identifier: Liu, Hanwen <https://research.library.mun.ca/view/creator_az/Liu=3AHanwen=3A=3A.html>   (2017) Revised burst model for pipeline integrity assessment.  Masters thesis, Memorial University of Newfoundland.

abstract:
The failure of pipelines，often caused by corrosion affects the environment and
economy considerably. To prevent this, it is necessary to focus on the corrosion of the
pipelines. Burst pressure is a key factor to assess the integrity of a pipeline. There are
three ways to determine burst pressure, lab testing, evaluation criteria (based on
deterministic approach), and the Finite Element Method (FEM). The results of burst
pressure assessment using evaluation criteria are too conservative compared to the
results of an actual pipe burst experiment and FEM (Alves J L, 2003).
The objectives of this thesis are to analyze the changing trend of burst pressure of
pipelines with different defect dimensions; to compare the FEM results with those of
the evaluated criteria to indicate the conservative property; and to revise the DNV
burst model and verify its validity with actual burst experiments. The revised DNV
model predicts burst pressure more reliably that could result in better engineering
design of pipelines.


identifier: Barrett, Joshua <https://research.library.mun.ca/view/creator_az/Barrett=3AJoshua=3A=3A.html>   (2017) Commuters and communities: the social and economic impacts of labour mobility on source communities.  Masters thesis, Memorial University of Newfoundland.

type: Thesis NonPeerReviewed

abstract:
During the past two decades, great emphasis has been put on social and cultural
patterns of movement within the social sciences, leading to the establishment of what has
been called the ‘mobilities turn’. One type of mobility is known as Employment-Related
Geographical Mobility (E-RGM), which involves situations where workers consistently
cross municipal, provincial, and/or national boundaries to get to their place of
employment and back to their place of residence. The purpose of this Masters research is
to study the social and economic impacts of E-RGM on source communities. The
particular focus is on workers employed at Vale’s nickel processing facility in Long
Harbour, Newfoundland and Labrador who commute there from various communities
across the province and beyond, and how these workers spend their time and money in
their source communities. Results of this research indicate that while many Vale
processing workers have less time to participate in community activities since starting
their employment, certain work schedules and commute arrangements allow more time
for workers to engage in their communities. Further, many workers involved with
extended daily commutes are more inclined to purchase goods and services locally than to
travel to nearby urban centres. Overall, the way a worker engages with their community
depends on a variety of circumstances, including their particular commute and work
arrangement.


identifier: Whiteman, Jesse <https://research.library.mun.ca/view/creator_az/Whiteman=3AJesse=3A=3A.html>   (2017) Ethopharmacological approaches to the study of fear learning and memory: focus on the mTOR Kinase pathway and predator stress models.  Masters thesis, Memorial University of Newfoundland.

abstract: Traumatic experiences (rape, assault, combat) can cause Post-Traumatic Stress Disorder (PTSD), a source of substantial psychological suffering in those so affected. PTSD is defined by symptoms of traumatic re-experiencing, avoidance, and increased startle response (hyperarousal), along with disruptions in mood and cognition. The substantial social and individual burdens of the disorder strongly motivate research into its neural basis. Predator Stress (PS) models have been introduced to the literature over the last 30 years in order to facilitate this. However, the cat exposure test (Adamec & Shallow, 1993) has proven variable in its effects on rodent subjects. The experiments described here were performed with the aim of developing a more reliable and robust predator stress-based animal model of PTSD. Experiment 1 tested whether predator vocal sounds (cat calls) produced a PTSD-like phenotype in rats, and did not produce any significant effects. Experiment 2 modified the Rat Exposure Test (RET; Yang et al., 2004) and demonstrated predator stress effects on measures of contextual fear memory, anxiety-like behaviour, and hyperarousal, suggesting the RET is a useful model of PTSD. Experiment 3 tested whether inhibition of the mTOR kinase pathway with Rapamycin (RAP) would attenuate the consolidation of these memories. RAP blocked contextual fear memories and attenuated anxiety, but the effects of the RET were not as consistent as in Experiment 2. Reasons for the continued variability in predator stress models (and the neuroscience of learning in general) are discussed.


identifier: Liu, Jiabin <https://research.library.mun.ca/view/creator_az/Liu=3AJiabin=3A=3A.html>   (2017) Recovery of vanadium and nickel from oil fly ash.  Masters thesis, Memorial University of Newfoundland.

abstract:
Oil fly ash (OFA) is a by-product originated from burning of crude and residual oil for energy. OFA is defined as hazardous waste in many countries because it is acidic and contains harmful heavy metals, which raises the risk of its contamination to the surrounding environment. However, OFA contains up to 90% carbon and numerous studies have been conducted on developing adsorbents derived from OFA. The group in the Faculty of Engineering and Applied Science at Memorial University has been focusing on the research that utilizes modified OFA in water and wastewater treatment for the last seven years. However, the cleaning of the OFA prior to use has not been systemically investigated yet. In addition, studies showed that OFA can be a potential source for vanadium and nickel and it is possible to recover these metals from the OFA cleaning process, so that the economic value of the OFA can be further maximized.
The selection of OFA cleaning and metal (mainly vanadium and nickel) recovery processes is heavily dependent on the properties of the OFA such as ash content, metal composition & oxidization state, sulfur content, pH, and particle size. Although various methods with high recovery rates had been proposed in literatures, they may not obtain the same result with different OFAs. Therefore, the purpose of this study is to develop a practical integrated cleaning and metal (vanadium and nickel) recovery process specifically for the OFA that the group has been dealing with. In this work, the leachability of five major metals (vanadium, nickel, iron, magnesium, and aluminum) by sulfuric acid, sodium hydroxide and ammonia at different concentrations were tested. After identifying the preferred leaching conditions, three metal recovery methods (i.e., chemical precipitation, ion exchange resin and solvent extraction) were evaluated. Based on the results, three complete metal leaching and recovery processes were proposed and their performances were assessed by mass balance calculation.
Briefly, the study showed that both strong acid and strong base can effectively extract vanadium from the OFA, however, base leaching may require additional leaching processes to recover nickel and carbon. Therefore, strong acid, sulfuric acid in this case with concentration ranging from 0.5N to 1N, solid/liquid ratio of 1:10 and mild heating, was selected for the sequential selective metal recovery tests. Among those three metal recovery processes, solvent extraction showed better extraction rate and selectivity. Between the selected solvents, Trioctylamine (TOA) is preferred over Di-(2-ethylhexyl) phosphoric acid (D2EHPA) for high iron OFA (SPP) as it only extracts vanadium (V), while D2EHPA co-extracts both vanadium and iron. The complete integrated process showed that 89.7% nickel and 59.2% of vanadium was recovered by acid (sulfuric acid) leaching and TOA solvent extraction. The study also found that the metal content in OFA has great impact on the recovery rate as higher metal concentration in the leachate leads to higher extraction and precipitation rates. Since the vanadium and nickel content in OFA varies greatly, a segregation process is recommended to treat high carbon OFA and high metal OFA separately.


identifier: Dolny, John Robert <https://research.library.mun.ca/view/creator_az/Dolny=3AJohn_Robert=3A=3A.html>   (2017) A technical methodology for establishing structural limitations of ships in pack ice.  Masters thesis, Memorial University of Newfoundland.

abstract: This thesis presents a technical methodology for determining operational limitations for ships in pack ice from a structural risk perspective. The methodology relies on mechanics of ship-ice interaction and direct analysis of structural response. The limitations are presented in the form of so-called “safe speed” curves derived by a set of calculations under specific technical assumptions. These operational envelopes are useful in understanding a ship’s structural capability in a variety of ice types beyond the notional description of an ice class notation or lack thereof. The work focuses on hull forms and structural arrangements which are not necessarily intended for dedicated or aggressive ice operations and explores consequences of different operational demands. Non-ice strengthened and light ice class structures that may operate in light to medium pack ice present new technical challenges that require modifications to the conventional mechanics that form the basis of existing models and approaches. This thesis proposes several modifications and offers two case studies to demonstrate the methodology and highlight the influence of key parameters.


identifier: Baird, John-Ray <https://research.library.mun.ca/view/creator_az/Baird=3AJohn-Ray=3A=3A.html>   (2017) Experiences of beginning physical & health education substitute teachers: a narrative perspective.  Masters thesis, Memorial University of Newfoundland.

abstract:
The purpose of this research was to live, relive, tell and retell the experiences of
substitute Physical and Health Education (PHE) teachers, and the impact of these
experiences on teacher identity. Using the methodology of narrative inquiry, I first wrote
my own narrative beginnings of my life as a student of PHE, my journey throughout
Physical and Health Education Teacher Education (PHETE) and pre-service teaching, as
well as life as a substitute teacher. After understanding my own experiences, I narratively
inquired into two beginning PHE substitute teachers’ experiences. After learning of the
experiences of both beginning PHE substitute teachers, I weaved their experiences with
those of my own in order to determine resonant narrative threads that relate to teaching as
a beginning PHE substitute teacher. Within these resonant narrative threads, topics of
teaching identity and stories to live by; relationships with other teachers, students, and
community members; as well as identity conflict were discussed. Finally, shifting of
stories to live by were addressed to learn how to take the information learned throughout
this inquiry and use it as we continue to live as PHE substitute teachers.


identifier: Shen, Jiaben <https://research.library.mun.ca/view/creator_az/Shen=3AJiaben=3A=3A.html>   (2017) Power system operation with wind energy integrations.  Masters thesis, Memorial University of Newfoundland.

abstract:
Wind energy with its low environmental impacts and sustainability has taken up a
large share of the electricity generation market and it is expected to grow. The original
power systems are primarily dominated by synchronous generators while wind
generators utilize asynchronous induction machine to convert wind energy into
electricity. Moreover, wind speed is not controllable. The integrations of wind energy
into power systems have a great impact on power system operation. The influences
brought by wind generators should be understood for maintaining secure and reliable
operation of power systems.
The inclusion of power electronic devices enables the variable speed operation of the
wind generators. It largely facilitates the integrations of wind energy. This thesis
considers doubly fed induction generators (DFIGs) type of wind generators. The
appropriate modelling of wind generators for power system analysis is discussed.
Three aspects of power system operations are considered in this thesis, which are
steady state, small signal stability and transient stability analysis. The effects of wind
energy integrations on these three aspects of power systems are investigated in detail.
Different cases studies are provided throughout the thesis to illustrate effects brought
by wind energy and arrive at the conclusions.


identifier: Elfied, Khawla <https://research.library.mun.ca/view/creator_az/Elfied=3AKhawla=3A=3A.html>   (2017) Is SmB₆ a topological insulator?  Masters thesis, Memorial University of Newfoundland.

title: Is SmB₆ a topological insulator?

abstract:
We examined whether samarium hexaboride (SmB₆) is a topological insulator, or not
by reviewing and reanalyzing all published experimental results to date. Despite the
fact that the SmB₆ has long been known as a Kondo insulator, with strong correlations
and band hybridization, it is still of great interest because of low-temperature
transport anomalies which have recently been interpreted as evidence that SmB₆ is a
topological insulator. SmB₆ behaves electronically at high temperature like an insulator,
and at low temperature its resistance mysteriously saturates.
We studied de Haas van-Alphen quantum oscillation results to resolve the Fermi
surface topology in this material. Although dHvA measurement may be consistent
with two-dimensional conducting electronic states, we find an elongated 3D ellipsoidal
Fermi surface is also consistent with the experimental results. Furthermore, resistance
measurements also can give some evidence of SmB₆ surface conductivity, by studying
different geometries to determine whether the conduction is dominated by the surface
or the bulk. Also, we simulated the conductivity of a thin sample to assess whether the
experimental measurements on their sample are consistent with surface conductivity.
After analyzing these experiments and others, our conclusion is that the main
experimental results can be described as either bulk or surface conduction, but resistivity
measurements strongly suggest surface conduction. Even if further studies
prove the surface conductivity, further studies will be required to show that SmB₆ is a topological material.


identifier: Faghih, Mohammad Hassan <https://research.library.mun.ca/view/creator_az/Faghih=3AMohammad_Hassan=3A=3A.html>   (2017) Design of novel generation of rigid revolute, cardan and ball joints.  Masters thesis, Memorial University of Newfoundland.

abstract:
The thesis is focused on the design and fabrication of different joints as part of a team
member of three master’s students to design a parallel robot in the fishery. The general
approach of how to design a parallel robot is presented. Then, the design and fabrication of
a fully articulated snow crab as a model is given in order to use as a test model for the
parallel robot. A new design of the revolute joint with a novel concept is presented in this
work. The revolute joint with a conical shape uses two sleeves between the joint parts which
are coated with Molybdenum Disulfide (MoS₂). The role of MoS₂ is to lubricate the inner
parts of the revolute joint. A method for choosing the taper angle is presented based on the
application. The authors fabricated the proposed new design at the machine shop of
Memorial University and the joint proved to have successful functionality. Afterwards, the
design and fabrication of the fork revolute joint, cardan joint (universal joint) and ball joint
based on the design of the revolute joint is represented. Overall, the design of different joint
types in this thesis is usable not only in the parallel robot but also in many mechanisms and
applications.


identifier: Soran, Niketa <https://research.library.mun.ca/view/creator_az/Soran=3ANiketa=3A=3A.html>   (2017) The role of central drive and afferent feedback on corticospinal excitability during arm cycling.  Masters thesis, Memorial University of Newfoundland.

abstract: Corticospinal excitability to the biceps brachii muscle is modulated in a phase-dependent manner during arm cycling, being high during the elbow flexion phase and low during the elbow extension phase. As the intensity of cycling is increased by increasing the cadence, however, corticospinal excitability to the biceps brachii is enhanced during the elbow extension while spinal excitability is decreased. This led to the conclusion that the increase in corticospinal excitability during elbow extension was likely mediated via supraspinal mechanisms, though the potential mechanisms were not examined. This gave rise to the current study, the primary objective of which was determine whether the previous demonstration of a cadence-dependent increase in supraspinal excitability to the biceps brachii during the elbow extension phase of arm cycling was due to central drive and/or afferent feedback.


identifier: Driscoll, Shannon <https://research.library.mun.ca/view/creator_az/Driscoll=3AShannon=3A=3A.html>   (2017) Bariatric surgery and its impact on long-term (≥ 5 years) health related quality of life.  Masters thesis, Memorial University of Newfoundland.

abstract:
Bariatric surgery results in significant weight loss in the majority of patients living with severe
obesity (BMI≥35kg/m²). Improvement in Health Related Quality of Life (HRQoL) is an equally
important patient reported outcome; however, there are few studies reporting the impact of
bariatric surgery on long-term (≥5 years) HRQoL outcomes. The main aim of this thesis was
two-fold: first to conduct a SR in order to assess the quality of evidence and effectiveness of
bariatric surgery on HRQoL ≥ 5 years in patients ≥18 years compared to non-surgical control
groups and second to conduct a meta-analysis (MA) of studies that have been deemed
appropriate.
PubMed, Cochrane Review, EmBase, CINANL, PsycInfo, obesity conference abstracts, and
reference lists of published papers were searched. Keywords were bariatric surgery, obesity, and
quality of life. Studies were included if (1) there was ≥5 years follow-up, (2) patients had class II
or III obesity, (3) individuals completed a validated HRQoL survey, and (4) there was a nonsurgical
comparison group with obesity. Two reviewers independently assessed each study.
From the initial 1376 articles, 9 studies were included in the SR and 6 in the MA.
Inconsistent results for long-term improvements in physical and mental health emerged from the
SR. However, in contrast, the MA found significant improvements in these domains ≥5 years
after bariatric surgery. These study findings provide evidence for a substantial and significant
improvement in physical and mental health favoring the surgical group compared with controls
spanning 5 to 25 years after surgery, an important finding for patients, clinicians and decisionmakers.


identifier: Sun, Yuanxin <https://research.library.mun.ca/view/creator_az/Sun=3AYuanxin=3A=3A.html>   (2017) Antioxidant and biological activities of tyrosol, hydroxytyrosol and their esters.  Masters thesis, Memorial University of Newfoundland.

abstract: A series of lipophilic esters of tyrosol and hydroxytyrosol, two naturally occurring phenols in olive oil with interesting biological properties, were prepared by an enzymatic and simplified base extraction procedure. Both tyrosol and hydroxytyrosol are hydrophilic molecules with poor solubility in lipophilic media, resulting in limited usage in foods and limited uptake by the cells and bioavailability in vivo. The antioxidant activities of esters so produced were evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH), human low-density lipoprotein (LDL) oxidation, and DNA strand scission assays. The antiviral properties of selected esters were measured using hepatitis C virus (HCV) protease and alpha-glucosidase inhibitory activities. Antiglycation by bovine serum albumin (BSA)-glucose assay, protection effect against oxidative stress, generation anti-inflammatory products by nitrite assay, and cytotoxic properties by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay of selected esters were also evaluated. All methods used for the antioxidant activity evaluation indicated that tyrosol (TY) and its derivatives were less active than the corresponding hydroxytyrosols (HTY), which reflected the influence of the ortho-diphenolic (catechol) structure of the latter on antioxidant capacity. For hydroxytyrosol, the introduction of the lipid moiety decreased its antioxidant activity. We observed the inhibition of HTY saturated fatty acid esters against hydroxyl radical induced DNA oxidation decreased as alkyl chain length increased. Meanwhile, an unsaturation-dependent antioxidant effect was observed for TY and HTY esters in DNA strand scission assay, and for TY esters in DPPH assay. However, in the LDL oxidation assay, the polyunsaturated fatty acid (PUFA) moiety of TY esters may be oxidized. For antiviral properties of selected esters, most of the TY derivatives that showed potent inhibition on α-glucosidase were not active against HCV while HTY esters showed very good HCV protease inhibition, especially HTY caprylate, stearate and oleate esters which displayed 3-fold stronger inhibition than that of embelin (the positive control). Moreover, it was found that lipophilization by esterification could improve the anti-inflammatory and antiglycation effects of tyrosol and hydroxytyrosol. These results indicate that the lipophilic ester derivatives can served as antioxidant ingredients in food, as well as anti-inflammatory, antiglycation, and antiviral agents, and ingredients in other therapeutic applications, supplements and natural health products.


identifier: Farooqi, Zohaib H. <https://research.library.mun.ca/view/creator_az/Farooqi=3AZohaib_H=2E=3A=3A.html>   (2017) Implementation of nonlinear model predictive control on all terrain mobile robot.  Masters thesis, Memorial University of Newfoundland.

abstract:
The objective of this thesis is to control a mobile robot with nonholonomic constraints
to achieve two control objectives: point stabilization and trajectory tracking. This
research adopts Nonlinear Model Predictive Control (NMPC) to achieve these control
objectives. The mobile robot platform used in the research is Seekur Jr., which is a
skid-steering all terrain mobile robot with nonholonomic constraints. In this study
NMPC is developed and tested for both indoor and outdoor navigation. To address
the indoor localization issues, two methods have been adopted. In the former approach
for indoor localization, a map of the environment is generated using a laser
range finder. This map, along with laser range finder, is used to determine the pose
(position and orientation) of the mobile robot in the environment. In the second
approach, OptiTrack motion capture system has been used, which gives the position
data of the mobile robot in the environment and orientation is evaluated through
this. For outdoor navigation, Global Positioning System (GPS) is used to obtain the
localization. The implementation of NMPC involves solving a dynamic optimization
control problem, which makes the evaluation of control command time consuming.
Therefore, it is difficult to implement NMPC for mobile robots in real-time applications.
To address this issue, an open source toolkit solving Optimal Control Problem
(OCP) has been used to implement fast NMPC routine, which provides real-time
applicability of the control strategy. Obstacle avoidance feature is also added to the controller to avoid static obstacles in the trajectory of the mobile robot. The proposed
control strategy is evaluated on a number of simulations and experimental studies.
The results validate the real-time applicability of the proposed approach in indoor
and outdoor navigation.


identifier: Saeed, Yasir <https://research.library.mun.ca/view/creator_az/Saeed=3AYasir=3A=3A.html>   (2017) Youth violence and radicalization: a theoretical and conceptual analysis.  Masters thesis, Memorial University of Newfoundland.

abstract: Most of the theories on youth violence and radicalization focus on Western youth. It has been a challenge for researchers to link youth these theories to Orient. Edward Said acknowledged the biasness of analyzing these theories from specific lens by introducing the radical notions of Orientalism and Occidentalism. Orientalism is motivated by the suffering of gathering the information about countries, peoples and cultures of the Orient. Occidentalism is a counter-field of research which can be developed in the Orient in order to study the West from a non-Western world point of view. Said (1978) considered these differences between East and West as imaginative geographies. This paper interprets the youth violence and radicalization thesis as a sweeping caricature shot through Orientalist imaginaries. The culture of violence argument is considered to invoke imaginative geographies that problematically erase the contingency, fluidity and interconnectedness of the violent. Moreover, factors at different levels of social organization are also described in detailed in order to understand the underlying situation of youth violence and radicalization. However, in Orient, the focus has almost exclusively been on the use of Islam as a political ideology that justifies and promotes radicalization and violence in society. While other manifestations of the problem also exist (such as organized crime, and gangs), it is this strand that remains most critical to Occident interests. It is concluded that the factors outlined in the paper may vary according to the context, experience and situation of youth living in East and West. But there are differences in perspectives in understanding youth violence and radicalization in East and West.


identifier: Clements, Kendsey <https://research.library.mun.ca/view/creator_az/Clements=3AKendsey=3A=3A.html>   (2017) Le thème de l’émigration dans L’ignorance de Milan Kundera.  Masters thesis, Memorial University of Newfoundland.

abstract:
Le présent mémoire vise à étudier les questions existentielles qu’entraîne le phénomène de
l’émigration dans L’ignorance de Milan Kundera. En utilisant l’émigration comme sujet
principal, il traite des questions existentielles telles que l’identité, l’exil, la nostalgie, le retour, la
mémoire et l’oubli. Cette étude s’appuiera sur les travaux de Jean-Claude Kaufmann et d’Amin
Maalouf sur l’identité, d’Alexis Nouss et d’Edward Saïd sur l’exil, de Vladimir Jankélévitch sur
la nostalgie, et d’Edward Casey au sujet de la mémoire et l’oubli pour l’analyse du roman.
L’analyse thématique de cette oeuvre nous permettra de mieux comprendre l’expérience de
l’émigré et les questions existentielles que provoque le « piège de l’émigration ».
The present thesis aims to study the existential questions brought on by the phenomenon of
emigration in L’ignorance by Milan Kundera. By using emigration as the main subject of the
novel, the author deals with existential questions including: identity, exile, nostalgia, return,
memory and forgetting. This study will make reference to the works of Jean-Claude Kaufmann
and Amin Maalouf on identity, Alexis Nouss and Edward Saïd on exile, Vladimir Jankélévitch on
nostalgia and Edward Saïd on the subject of memory and forgetting for the analysis of the novel.
The thematic analysis of this novel will allow us to better understand the experience of the
émigré and the existential questions that provoke the “trap of emigration”.


identifier: Maddison-MacFadyen, Margôt <https://research.library.mun.ca/view/creator_az/Maddison-MacFadyen=3AMarg=F4t=3A=3A.html>   (2017) Reclaiming histories of enslavement from the maritime Atlantic and a curriculum: the history of Mary Prince.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
This
dissertation
explores
The
History
of
Mary
Prince,
A
West
Indian
Slave,
Related
by
Herself
(1831)
from
an
historical
perspective.
I
place
Prince
in
the
story
of
British
Abolition,
and
examine
Prince’s
and
her
family’s
relationships
with
their
Bermudian
slave-‐owners,
and
Prince’s
relationships
with
Moravian
missionaries
in
Antigua.
Oral
traditions
regarding
Prince
from
Grand
Turk
Island
and
Antigua
directed
my
archival
explorations,
which
resulted
in
findings
that
confirm
and
broaden
aspects
of
Prince’s
story.
I
also
located
two
still-‐standing
residences
associated
with
Prince
in
Bermuda.
As
well,
I
analyze
the
collaborative
writing
team
that
produced
Prince’s
slave
narrative
from
the
perspective
of
Abolition.
Mary
Prince
was
the
storyteller,
Susanna
Strickland
(later
Moodie)
was
the
compiler,
and
Thomas
Pringle
was
the
editor
and
financial
backer
of
the
project.
Additionally,
I
consider
Ashton
Warner’s
Negro
Slavery
Described
(1831),
which
was
a
product
of
the
same
team,
but
with
Warner
as
storyteller.
I
suggest
that
the
two
slave
narratives
were
a
duology
to
be
read
in
tandem.
I
draw
out
a
central
image
from
both
slave
narratives—the
enslaved,
bound,
and
flogged
black
woman—and
propose
that
abolitionists
used
this
image
to
bring
about
social
change
by
witnessing.
My
thesis
includes
a
curriculum
based
on
The
History
of
Mary
Prince,
which
works
with
Bermuda’s
Social
Studies
curriculum,
and
I
have
created
a
website,
maryprince.org,
to
supplement
this
curriculum.
The
website
also
stands
alone
as
an
educational
resource
for
students
and
teachers
worldwide.
The
fundamental
goal
of
the
curriculum
is
to
open
students’
historical
consciousness
to
the
Middle
Passage
and
to
colonial
enslavement
so
that
they
may
understand
a
root
cause
of
racism
in
the
Americas.
To
aid
with
this,
I
have
theorized
an
educational
approach
to
open
historical
consciousness
that
is
procedural
in
nature,
and
includes
autobiographical
survivor
accounts,
primary
sources,
visiting
significant
sites,
secondary
sources,
and
fictionalized
accounts.
I
use
the
metaphor
of
“nesting
dolls”
to
explain
this
approach.
I
also
argue
that
creolization
is
a
path
of
hope
and
that
a
history-‐infused
food
garden
is
a
place
where
we
may
learn
about
our
creolized
identity.


identifier: AlKusayer, Nouf Majed <https://research.library.mun.ca/view/creator_az/AlKusayer=3ANouf_Majed=3A=3A.html>   (2017) Psychometric analysis of Iowa infant feeding attitude scale to improve clinical use and efficacy among prenatal women in Canada.  Masters thesis, Memorial University of Newfoundland.

abstract: Breastfeeding is the optimal source of nutrition for newborns, and yet the rates of breastfeeding initiation and continuation in Canada, and specifically Newfoundland and Labrador (NL) are low. Maternal attitudes toward breastfeeding is the best predictor of breastfeeding behaviour, and can be assessed using the validated 17-item Iowa Infant Feeding Attitude Scale (IIFAS). This thesis aimed to 1) reduce the IIFAS to a more manageable length while maintaining its validity and reliability and 2) determine optimal cut-off scores for both the original and reduced IIFAS with the objective being to increase its clinical usefulness in various settings. A 13-item psychometrically and conceptually sound IIFAS is proposed. Cut-off scores of 60 on the original scale and 45 on the reduced item IIFAS scale are the optimal cut-off scores to identify intention to breastfeed and infant feeding outcomes at one month postpartum in mothers in their 3rd trimester of pregnancy.


identifier: Jacobs, Ashley <https://research.library.mun.ca/view/creator_az/Jacobs=3AAshley=3A=3A.html>   (2017) A comparison of two automated devices that measure refractive error.  Masters thesis, Memorial University of Newfoundland.

abstract: The present study compared the reliability, validity, and screening effectiveness of the Welch Allyn SureSight Autorefractor (WASS) and the PlusoptiX S09 Vision Screener (PS09). Eighty-nine children attending appointments at a pediatric ophthalmology clinic were tested twice each with the PS09 and the WASS. Each child then completed the gold standard examination of refractive error, cycloplegic retinoscopy, with one of two pediatric ophthalmologists. Refractive error scores from the two devices were compared to cycloplegic retinoscopy. Results indicated that the PS09 yielded better reliability than the WASS on both spherical refractive error (Coefficients of Repeatability [CORs] = 1.21D v. 1.63D) and cylindrical refractive error (CORs = 0.50D v. 0.58D). Although the PS09 yielded better agreement with cycloplegic retinoscopy than did the WASS on spherical refractive error (CORs = 3.53D v. 4.19D), the validity of both devices was quite poor. Furthermore, both devices significantly underestimated hyperopia. Compared to the PS09, the WASS yielded slightly better agreement with cycloplegic retinoscopy on cylindrical refractive error (CORs = 0.87D v. 1.06D). In terms of screening effectiveness, the WASS yielded superior sensitivity (WASS = 69%; PS09 = 46%), but the PS09 yielded superior specificity (PS09 = 90% v. 54%). These results demonstrate the impact of the selection of pass/fail criteria, and therefore, the screening accuracy of each device was also calculated. The PS09 was the more accurate device (PS09 = 66%; WASS = 62%). In all, the analyses suggest that the PS09 is the superior device, but only by a very small margin.


identifier: Alcock, Lynsey Rose <https://research.library.mun.ca/view/creator_az/Alcock=3ALynsey_Rose=3A=3A.html>   (2017) Short-interval intracortical inhibition influences cortical excitability to the biceps brachii during arm cycling, but is not different from an intensity-matched tonic contraction.  Masters thesis, Memorial University of Newfoundland.

abstract: Rhythmic and alternating movements, such as walking and cycling tasks, are studied to better understand the mechanisms of neural control involved in human voluntary motor output. Researchers can apply this understanding to current rehabilitative techniques commonly used among those suffering from disuse, disease, and disability. Studies have shown that although locomotor tasks are largely spinally-mediated, supraspinal centres (above the level of the spinal cord) are also involved in generating these movements. The motor cortex, for example, is comprised of both facilitative and inhibitory circuits which produce an overall effect on neurons projecting to muscles, resulting in either increased or decreased excitability. The mechanisms responsible for these effects are complex, variable depending on type of motor task, and are not well understood. Therefore, the purpose of this study was to examine a mechanism of cortical inhibition during arm cycling, which is a model of locomotor output.


identifier: Pedram, Pardis <https://research.library.mun.ca/view/creator_az/Pedram=3APardis=3A=3A.html>   (2017) Nutritional, hormonal and genetic factors in the development of overeating tendency toward food addiction.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
Overeating is believed to be the primary factor responsible for the increasing prevalence of human obesity. A proportion of people develops a chronic obsessive/compulsive relationship to foods that is defined as food addiction (FA). The degree that FA contributes to obesity in the general population, and the key factors involved in FA, are unknown. The aims of the thesis were to assess and to find: 1) The prevalence of FA in the general population; 2) If clinical symptom counts of FA were significantly correlated with body composition measurements; 3) If food addicts were significantly more obese than controls, 4) If any macronutrient intake is associated with FA, 5) The link of hormones and neuropeptides that regulate appetite and metabolism with FA, 6) The differences of dietary nutrient intakes (micro- and macro-nutrients) between obese individuals with FA (FAO) or without FA (NFO), and 7) Discovery of novel FA associated candidate genes.
The current thesis consists of three phases. In phase I, I found that the prevalence of FA in the general NL population was 5.4% and women had double the prevalence relative to men. FA was significantly associated with obesity (vs normals). Additionally, FA was positively correlated with severity of obesity.
In phase II, compared to NFO, FAO individuals had lower levels of TSH, TNF-α, and amylin, but higher levels of prolactin. The total calorie intake, the dietary intake of fat and the percent calorie intake from fat and carbohydrates was higher in the FAO. FAO subjects consumed more sugar, minerals (including sodium, potassium, calcium and selenium), fat and its components, omega 3 and 6 fatty acids, vitamin D and gamma-tocopherol than NFO.
The phase III by combining exome sequencing technology with genetic association analysis in 2 equally obese but with opposite extreme phenotype of FA, we discovered and validated two FA candidate genes: DRD2 and TIRAP. Our discoveries suggest that FA may represent a sub-group of obese individuals with unique nutritional, hormonal and genetic factors.


identifier: O'Brien, Renée <https://research.library.mun.ca/view/creator_az/O=27Brien=3ARen=E9e=3A=3A.html>   (2017) Une étude de la moralité et sa relation à la culture commune exprimée par "La Belle et la Bête".  Masters thesis, Memorial University of Newfoundland.

abstract: Ce mémoire se concentrera sur les contes de fées français du XVIIIe siècle, spécifiquement La Belle et la Bête. Madame de Villeneuve fut la première à écrire le conte et il a été publié dans son oeuvre La jeune Américaine et les contes marins en 1740. Seize ans plus tard, Madame Leprince de Beaumont a réécrit l'histoire dans une version beaucoup plus courte et elle l’a publiée dans son oeuvre Le magasin des enfants (1756). La version de Madame Leprince de Beaumont est celle que nous connaissons aujourd'hui, avec quelques adaptations. Nous allons aussi analyser le film Beauty and the Beast de Walt Disney (1991). En plus d'utiliser les deux contes « originaux » et la version de Disney susmentionnés, nous allons aussi construire notre analyse sur la base de la poursuite des idées de Jack Zipes dans son oeuvre, Fairy Tales and the Art of Subversion (2012). Nous allons démontrer que la morale enseignée à nous dans notre enfance par le moyen de contes de fées crée à son tour la moralité des adultes, ce qui façonne finalement les normes sociétales. En outre, nous allons analyser les archétypes de morales, en particulier leurs influences sur la culture populaire et la modernité en général. Tout d'abord, nous allons examiner « la Belle », le personnage féminin, à travers différentes versions de l'histoire. Nous allons étudier son développement à travers le temps et nous allons expliquer la façon dont elle a été « écrite » dans chaque version dans un contexte historique. Nous allons ensuite examiner « la Bête » de la même manière. Nous prévoyons analyser le rôle de quelques personnages secondaires ainsi. Enfin, nous tenons à entrer en détail dans la façon dont une morale commune peut à la fois opprimer et assurer la civilité parmi les masses. Les modèles de stéréotypes de caractères ont établi des croyances profondes, les rôles des sexes, la dynamique du pouvoir et le sectarisme dans la société. Tout cela a dissuadé et a rendu la femme impuissante, malgré de nombreux rôles féminins, y compris celles en dehors des normes sociétales. Cependant, dans un temps de tyrannie, ces rôles graisseront les roues vers la civilité.


identifier: Morshed, Munzarin <https://research.library.mun.ca/view/creator_az/Morshed=3AMunzarin=3A=3A.html>   (2017) Characterization of two-phase flow slug frequency and flow regimes using wavelet analysis.  Masters thesis, Memorial University of Newfoundland.

abstract:
The characteristics of multiphase fluid flow in pipes are useful to understand fluid
dynamics encountered in the oil and gas, chemical and production industries. During the
transport of different types of fluid, understanding the hydrodynamic behavior inside the
pipe network is important for flow assurance. The presence of relative agitation in the
interfaces and inconstant interactions among distinct phases, multiphase flow becomes a
complex conveyance phenomenality in contrast to single-phase flow. This study is focused
on gas/Newtonian and gas/non-Newtonian two-phase horizontal flow structure. This
investigation ranges from analyzing volume fraction, pressure drop, flow regime
identification, flow structure analysis, etc. This involves recognition of the two-phase flow
regimes for this flow loop and validates it with the existing flow maps in the literature. In
another study, slug frequency has been examined and compared with air/Newtonian and
air/non-Newtonian fluid in the flow loop. Finally, wavelet packet transformation is used to
decomposition pressure signals for different flow pattern.


identifier: Almostafa, Mervt <https://research.library.mun.ca/view/creator_az/Almostafa=3AMervt=3A=3A.html>   (2017) Tandem mass spectrometric analysis of a series of bacterial lipid as belonging to the Vibrionaceae family.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
This study presents the mass spectrometry structural elucidations of the extracted heterogeneous lipid As mixtures, obtained from native lipopolysaccharides (LPSs) isolated from different types of the Vibrionaceae family. As this Gram-negative bacteria family is well known to cause many serious animal diseases and human diseases. This investigation was originally aimed to investigate the treatment of bacterial infected fish with phages as a potential treatment for pathogenic bacterial infections. In this thesis, I shall discuss the electrospray ionization mass spectrometry (ESI-MS) and low-energy collision induced dissociation tandem mass spectrometry analysis (CID-MS/MS); and MALDI-TOF-MS/MS (high-energy CID-MS/MS) of a heterogeneous mixture of lipid As. These lipids As were isolated from the rough lipopolysaccharide (LPS) of the mutant wild strain of the Gram-negative bacteria Aeromonas. liquefaciens SJ-19, Aeromonas. hydrophilla SJ-55, and Aeromonas. salmonicidia SJ-113. These strains of bacteria were grown in the presence of phages and were isolated by the aqueous phenol method from this series of LPS of the rough wild strain of Gram-negative bacteria. Hydrolysis of the different LPS was accomplished with 1% acetic acid, and purification was by chromatography (Gel filteration affinity) using Sephadex G-50 and SephadexG-15.
These MS and MS/MS complex structural investigation were accomplished via the use of different hybrid MS instruments such as: ESI-MS with a fourier transform ion cyclotron (FTICR), a triple quadrupole (QqQ), and MALDI-TOF/TOF-MS instruments.
In that respect, low- and high-energy CID-MS/MS (known as tandem-in-space) and FTICR-MS/MS (known as tandem-in-time) mass spectrometry analyses were chosen for iii
the structural elucidation of this different series of lipid As isolated from A. liquefaciens SJ-19, hydrophilla SJ-55, and salmonicidia SJ-113a. Excellent elucidation structural results were obtained by using low collision induced (CID-MS/MS) analyses of the various heterogeneous mixtures of lipid As precursor deprotonated molecules with the two different triple quadrupole (QqQ) and FTICR-MS/MS instruments. The concomitant uses of high-energy CID-MS/MS obtained with the MALDI-TOF/TOF-MS instrument allowed the further elucidation of these complex biomolecules and can be effectively used for any structural identifaction studies.
Identifying the exact structures of these microheterogenious lipid As, obtained from Gram-negative bacteria grown in presence of phages, were by using mass spectrometry and tandem mass spectrometry techniques using different MSMS instruments, allowed to conclude that the biosynthesis of these series of mutant rough LPSs were indeed affected and produced a heterogeneous mixtures of different lipid As. Finally, this structural elucidation study provided us with a better understanding of the stereospecific gas-phase mass spectral fragmentation pathways; also, the exact sequence of these series of lipid A obtained from the rough bacteria LPSs, which have not yet been precisely established.


identifier: Hassan, Bilal <https://research.library.mun.ca/view/creator_az/Hassan=3ABilal=3A=3A.html>   (2017) Investigation of integrated geophysical methods to characterize near surface formations for environmental engineering.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract: Near surface nondestructive imaging for is aimed at evaluating unconsolidated to moderately consolidated porour or granular sediments. Usual targets of interest are depth to bedrock, depth of water table and mapping of subsurface morphology and evolution of toxic fluid (spills) flows such as oils, concentrated brines and their interactivity. Investigative propositions of interest span vast realm of geo-environmental engineering. This includes such applications as structural health and aseismic monitoring, hydraulic/hydrogeological characterization, geotechnical investigations including critical zones/sites identification in areas of public and industrial infrastructure development, groundwater management and natural resources exploration and exploitation associated activities such as mining and those termed unconventional in oil and gas industry. Conventional field methods include P- and S-wave surveys, and electrical resistivity (resistance) measurements. The presented results are outcomes and findings of two laboratory experimental studies designed, owing to their inherent amenability, on field scale concepts of the said methods, to advantage. In the first of two studies S-wave polarized propagation characteristics are exploited to quantitatively evaluate the combined architectural, rheological and fluid transport properties effect of fractured porous media (sandstone specimen) upon acquired or recorded (ultrasonic) S-wave signature when through transmitted with controlled source pulsing. Various time and frequency based analyses unambiguously delineate fracture geometry, stress effects of fracture stiffness and density, amplitude effects of fracture aperture size against the stationary effects of azimuth variability. Critical findings include the characteristic stop-band artifact in transmitted bandwidth signature of fracture planes and direct correlation of S-wave velocity anisotropy with permeability anisotropy. The second study involved spatio-temporal imaging of an immiscible fluid displacement (oil with brine) through an unconsolidated granular sediment analogue (glass-beads-pack) under controlled constant head flow conditions against gravity, using P-, S-wave and electrical resistance data, acquired as integrated. Dry and saturated granular material characteristics with different saturant (state) effects were evaluated post analyzed integrated offering fresh insights. Peculiar repeatable artifacts in imaged data not only unambiguously discriminated oil from brine, a consistent and significant "attenuation" signature of evolving fluid-fluid interface was discovered in ultrasonic data verifiable form electrical resistance observations. Ultrasonic velocity variation and frequency dependence could be understood employing usual anelastic/visco-elastic models of wave propagation, typically as Biot theory. Gassman and Biot theory applied to validate the results within a zero frequency and megahertz range appear to offer plausible analytical estimates of P-wave velocities. S-wave velocities are underestimated due to ambiguities surrounding the practiced procedures and methods of quantification of critical parameters, with no consideration to the nature of chraracteristics S-wave propagation being different compared to P-wave.


identifier: Ricketts, Alicia <https://research.library.mun.ca/view/creator_az/Ricketts=3AAlicia=3A=3A.html>   (2017) The effect of fitness on energy metabolism in lean and obese healthy men.  Masters thesis, Memorial University of Newfoundland.

abstract: This study was designed to assess the independent contributions of cardiorespiratory fitness (CRF) and adiposity to the metabolic health of obese individuals. It specifically focused on how body composition and CRF affect the relative contribution of glucose, fat and protein to energy production (EP) in resting state as well as during and after exercise. Eight obese fit (OF – 30±12 yrs., 178±6 cm, 105±8 kg) and eight lean fit (LF – 36±9 yrs., 181±5 cm, 82±5 kg) were screened for medical conditions and food/health supplement use and partook in two sessions – separated by 72 hr – that consisted of the following measurements: (1) a basal metabolic rate (BMR) in a fasting state for the determination of substrate oxidation (baseline) followed by an incremental running test for the determination of V̇O₂max and of exercise intensity that elicits maximal fat oxidation (MFO); (2) a BMR, an iso-caloric (300 kcal expenditure) treadmill exercise at MFO, a post-exercise metabolic rate (PEMR) in fasting state (30 min after exercise), and two PEMR in the fed state at 90 and 150 min after exercise. The fed state was achieved by a 300 kcal meal provided immediately after the first PEMR. Food intake and physical activity were monitored throughout the study. Although statistical significance was found in %FAT (p<0.001) between both groups (35±4% and 18±4 % for OF and LF, respectively), no differences were detected in V̇O₂max (OF:4.1±0.5 L·min⁻¹ and LF:4.2±0.5 L·min⁻¹) and V̇O₂MFO (OF:1.6±0.4 L·min⁻¹ and LF:1.8±0.5 L·min⁻¹) confirming CRF between-groups homogeneity. Further to these results, participants showed no substrate oxidation differences before, during, and after exercise. In conclusion, obese fit individuals display a pattern of substrate partitioning comparable to that observed in lean fit individuals, confirming that fitness can modulate the metabolic impacts of obesity and could reduce the risks of chronic diseases associated with obesity.


identifier: Caputo-Nimbark, Roshni <https://research.library.mun.ca/view/creator_az/Caputo-Nimbark=3ARoshni=3A=3A.html>   (2016) You wants aioli on that seal carpaccio, luh? On the viability of local dialect in the St. John's restaurant industry.  Masters thesis, Memorial University of Newfoundland.

abstract:
Nearly all dialects experience variation and change, and Newfoundland English (NE) is no
exception. As the growing service sector of Newfoundland and Labrador's capital city, St. John's,
strives to accommodate a competitive global enterprise culture (Harvey 2005), I question whether
spoken language is being reflected in these values. The aim of this thesis is twofold. First, to centralize
the workplace in variationist sociolinguistics research, looking specifically at two phonetic variables
within the St. John's restaurant industry. Second, to pursue an emic perspective (Eckert 2000) in
variationist research by inaugurating organizational identification (Cheney 1983; De Decker 2012), or
sense of oneness with one's place of work, as a new framework for analyzing linguistic variation.
I recorded a series of hour long, Labovian-style, semi-structured interviews with sixteen female
restaurant servers and hostesses from Newfoundland, working at any of six types of restaurant in St.
John's classified according to traditional sociolinguistic categories. Participants also completed an
Organizational Identification Questionnaire (OIQ) (Gautam et al. 2004). Interviews elicited tokens
corresponding to the phonetic variables of interest, slit fricative (Clarke 1986) and creaky voice (Yuasa
2010) in both casual and careful speech. Following interview transcriptions and coding of the two
variables, the influence of several external factors on OI and linguistic behaviour was analyzed with
multiple mixed-effects logistic regression models run using the glmer package in R (Johnson 2009).
The traditional variationist model shows local and expensive restaurant employees to exhibit
significantly less creak and affrication than employees of non-local and inexpensive restaurants
(p<0.000). The OI model presents nearly identical results, in that OI is strongest in local and expensive
restaurants and there is a strong negative correlation between OI and use of creaky voice and slit
fricative. Indeed, the relative lack of the observed variables among higher end restaurant employees,
coupled with incrementally higher OI, points to the linguistic capital (Bourdieu 1991) of neutral
speech, which appears to play a role in shaping the socially salient organizational image of the restaurant industry as a whole.
Overall, the OI model is seen as more meaningful than traditional variationist models because
rather than indexing an employee's linguistic behaviour to a fixed restaurant category, OI is viewed as
consonant with a restaurant's linguistic identity at a particular time and place, with ethnographies
providing emic, descriptive categorizations of restaurants, further qualifying the interaction between OI
and linguistic behaviour. It is hoped that this study encourages a discussion about how alignment with
perceived market identity relates to linguistic capital, how the economic evaluation of specific dialects
is temporarily manifested in variations of spoken English in the workplace, and how OI provides an
emic perspective for analyzing workplace variation.


identifier: Tang, Xiaoyan <https://research.library.mun.ca/view/creator_az/Tang=3AXiaoyan=3A=3A.html>   (2017) A semi-analytical streamline simulation in near-wellbore regions and its applications under constant pressure boundaries.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
Streamline simulation is a powerful tool that can be used for full field forecasting,
history matching, flood optimization, and displacement visualization. This research
thesis presents the extension of a semi-analytical streamline simulation method and
its application in the near-wellbore region in two-dimensional polar coordinate systems
and three-dimensional cylindrical coordinate systems. The main objective of
this research thesis is to study the effects of the permeability heterogeneity and well
completion details in the near-wellbore region. These effects dictate the streamline
geometries, which in turn influence well productivity. It is revealed that the semianalytical
streamline simulation method developed in this research thesis is the only
known streamline method with sufficient accuracy for streamline simulation in polar/
cylindrical geometries.
Previous streamline applications used a constant flow rate condition for each stream
tube. However, wells in low permeability reservoirs are often produced at constant
pressure. In this research thesis, streamline simulation is performed under constant
pressure boundaries. This is a novel and non-trivial extension of streamline simulation.
The semi-anlytical streamline method is applied in the perforated wells. Results indicate
that it is the only method that can accurately simulate the streamline path in such wells. A new skin calculation method based on the semi-anlytical streamline
simulation method is introduced and applied in perforated wells. This new skin
calculation method is believed to be superior and can be used to examine the effect
of the perforation parameters. It provides useful information for evaluating the well
completion strategy.
In this work, the two-phase displacement process is simulated along stream tubes. Solutions
are constructed by treating each stream tube as a flow unit by invoking novel
analytical solutions for such geometries. Visualization experiments are direct ways
to investigate the effect of the heterogeneity on flow distribution. Two-dimensional
radial waterflooding visualization experiments are performed under constant pressure
boundaries for homogeneous and heterogeneous porous media. The homogenous
case is used to history match and determine the relative permeabilities. Using these
relative permeabilities, the semi-analytical streamline simulation method is independently
validated against the results from the heterogeneous visualization experiments.


identifier: Westhues, Anne <https://research.library.mun.ca/view/creator_az/Westhues=3AAnne=3A=3A.html>   (2017) Emplacement, alteration history, ore genesis, and timing of mineralization, of iron oxide apatite ores and their host rocks in the Norrbotten region of northern Sweden.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
The origin of the iron oxide apatite (IOA) deposits around Kiruna in the Norrbotten region of northern Sweden, and similar deposits worldwide, has been debated for decades. Contrasting theories include: 1) iron oxide extracted from an immiscible silicate liquid-iron oxide melt; or 2) iron oxide transported and subsequently emplaced by hydrothermal fluids. This study is the first to combine detailed geochemical studies and in situ U-Pb dating on accessory minerals with tracer isotope geochemistry on the whole rock and mineral scale to explore the different hypotheses.
In situ U-Pb geochronology of zircon and titanite confirms a previously documented event around 1880-1900 Ma in the Norrbotten region, but dates the altered metavolcanic rocks in the footwall and hanging wall of the ore and a syenite more accurately at 1884 to 1880 Ma. A granite pluton has an age of 1874 Ma, in close overlap with zircon from two ore bodies (1877 – 1874 Ma). Zircon from the host rocks and the granite exhibit typical igneous growth zoning, whereas all zircon from the iron ore and some from intrusions show hydrothermal influences in texture and chemistry, including weight percent of water. Younger U-Pb dates from monazite and titanite suggest later events influencing the Kiruna IOA deposits between 1772 and 1628 Ma.
The isotopic systems used in this study, ranging from whole rock Sm-Nd and Lu-Hf to in situ oxygen and Lu-Hf in zircon, all show significant differences between samples from host rocks and ore. These differences can be best explained when invoking hydrothermal fluids at the magmatic-to-hydrothermal transition (T > 600 ºC) possibly exsolved from the intrusions, to mobilise and concentrate iron oxides as the massive IOA deposits. The main ore forming event is thought to have occurred around 1874 Ma, and Hf and Nd isotopic signatures suggest a depleted mantle source for these fluids, potentially related to the Kiruna greenstone group, which could also be an important iron source. Later hydrothermal events influenced the iron ores between 1772 and 1628 Ma and Sm-Nd isotope signatures of monazite indicate crustal inputs during this time frame, when part of the ore may have been remobilized.


identifier: Power, Barry Peter Frederick <https://research.library.mun.ca/view/creator_az/Power=3ABarry_Peter_Frederick=3A=3A.html>   (2017) Structures of bare and solvated metal ion - uracil complexes through infrared multiple photon dissociation spectroscopy and computational methods.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
Metal ions are essential to nucleic acid stability and activity, however at increased
levels, unwanted conformational changes are observed in nucleobases as a result of a direct
interaction with the ions. These changes can give rise to improper base pairing, and
subsequently lead to genetic mutations. Consequently, examination of the structure of metal
ion – nucleobase complexes has been of particular interest. These structures are studied
using gas phase techniques as a means of replicating the cellular environment, as condensed
phase analysis is hindered by bulk solvent effects. In order to observe the impact that
solvent molecules have on the isomerization of such complexes, microsolvation is
employed in gas phase experiments. Infrared multiple photon dissociation (IRMPD) is a
technique commonly used in the determination of these structures.
IRMPD spectra of alkaline earth metal complexes with uracil, both monomeric and
dimeric at varying degrees of hydration, are compared to those computed using electronic
structure calculations to determine the structures of these complexes. The spectra of the
structures calculated as lowest in energy offer good agreement with the experimental
spectra. In these lowest energy isomers, deprotonation of uracil is found to occur at the N3
position. In the dimeric complexes, the second uracil exists as a keto-enol tautomer, with
an intramolecular hydrogen bond formed between uracil moieties. In the case of hydrated
complexes, water coordination is always directly to the metal center.
Monomeric and dimeric uracil complexes with divalent d-block ions are also
examined, both hydrated and ammoniated. For the most part, good agreement is again
obtained between the calculated spectra of lowest energy isomers and the experimental spectra. These complexes also generally exhibit uracil deprotonation at the N3 position,
with the exception of copper complexes, where a distinct solvent effect is observed. As the
degree of hydration increases, the deprotonation site in uracil changes from the N1 to the
N3 position. The lowest energy singly hydrated Zn complex experiences proton transfer
from the water molecule to the uracil, resulting in a complex of the form [Zn(Ura)(OH)]⁺
where the uracil is a keto-enol tautomer. The ammoniated dimeric complexes adopt a
similar structure as that of the alkaline earth hydrated dimers, again with the exception of
the copper complex, where Jahn-Teller distortions result in a square planar structure with
ammonia coordination to the metal and a tridentate interaction with the neighbouring uracil
molecules.


identifier: Asaduzzaman, Md <https://research.library.mun.ca/view/creator_az/Asaduzzaman=3AMd=3A=3A.html>   (2017) A traffic signal control algorithm for emergency vehicles.  Masters thesis, Memorial University of Newfoundland.

abstract:
Signal preemption disrupts normal traffic signal to allow emergency vehicles to pass
through the intersection more safely and quickly. In medical emergency situations,
EVP (Emergency Vehicle Preemption) offers a faster response to the sufferer which
improves the chance of survival. Despite this lifesaving advantage, conventional preemption
has some problems which need more attention. Two important issues are
increased delay of overall traffic due to preemption and absence of prioritization of
conflicting preemption requests.
This thesis presents a traffic signal control algorithm that addresses the above.
We have used TSP (Transit Signal Priority) techniques to improve the EVP system.
TSP is a proven strategy to provide a better quality public transit operation in urban
areas. Our proposed algorithm adjusts signal phases using TSP techniques to serve
an emergency vehicle. We consider both single and multiple simultaneous emergency
vehicle requests. TSP techniques help us to alleviate the impact on general traffic. For
multiple emergency vehicle requests, a branch and bound algorithm is developed that
prioritizes among conflicting requests. Experiments have been conducted using the
VISSIM microscopic traffic simulator. Results show that the proposed traffic control
algorithm reduces overall traffic delay by up to 8% compared to conventional EVP
system.


identifier: Emami-Abarghouei, Babak <https://research.library.mun.ca/view/creator_az/Emami-Abarghouei=3ABabak=3A=3A.html>   (2016) Self-coach: an intelligent WBAN system for heart disease prediction using non-dominated sorting genetic algorithm.  Masters thesis, Memorial University of Newfoundland.

abstract:
Wireless Body Area Network (WBAN) is a new technology based on an
advanced healthcare system and Wireless Sensor Network (WSN). This domain has
been designed for monitoring patients using their physical signals by providing lowcost,
wearable, unobtrusive solutions for the continuous monitoring of cardiovascular
health and physical activity status. Recent studies have addressed the use of WBAN,
by means of real-time comprehensive health monitoring systems such as the Personal
Health Monitoring system (PHM). The aim of utilizing these systems is to provide a
fast and early diagnosis; however, WBAN has not fulfilled its potential while using
the existing methods of machine learning and data mining techniques. The proposed
method is a new framework for early heart failure prediction systems based on an
intelligent WBAN named Self-Coach. Self-Coach is an intelligent monitoring system
due to the detection/prediction method it uses, which provides real-time health status
monitoring using the Non-Dominated Sorting Genetic Algorithm.
In this study, Self-Coach is proposed as a new medical diagnosis method based on
the hybrid approach. This approach applies the Support Vector Machine (SVM) to
classification, where its parameter values are optimized and visualized by the Non-
Dominated Sorting Genetic Algorithm-II (NSGA-II). To predict a potential health
tolerance threshold for a particular patient, the optimal boundary curve between both
the healthy and unhealthy class and the patient's possible health positions based on
new conditions (blood pressure and heart rate) have been explored with NSGA-II. The optimal boundary is a set of non-dominated offspring from the unhealthy class
that has been generated with NSGA-II and verified with the SVM. These members
are plotted as a Pareto Front curve known as the optimal boundary curve. Based on
the SVM classification results, this is the most fitted curve which can separate the
healthy class from the unhealthy.
To explore the potential health position of a particular patient, new possible positions
will be generated with NSGA-II. To generate these points, the patient's dynamic
data (blood pressure and heart rate) will be increased and simulated utilizing NSGAII.
The potential tolerance threshold for each patient is the new health position for
that particular patient based on the new health conditions which will cross the optimal
boundary or be dominated by at least one of these members.
To evaluate the Self-Coach's performance, its experimental results (optimal boundary
members and explored tolerance thresholds for each individual) have been verified
using SVM and compared with the raw dataset classification results. Based on the
simulated results, this method can provide 24-hour health monitoring care for elderly
people and those who might have coronary heart disease. It is a new technology for
this domain. Real-time data analysis is a significant part of Self-Coach, which makes
it a good candidate for supporting a broad array of high-impact applications in the
domain of the healthcare system, for training, rehabilitation, surgical recovery and as
a home-based monitoring healthcare system.


identifier: Sayeed, Tanvir Mehedi <https://research.library.mun.ca/view/creator_az/Sayeed=3ATanvir_Mehedi=3A=3A.html>   (2017) Hydrodynamic interaction of wave driven icebergs in close proximity with a fixed offshore structure.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
Fixed or floating offshore structures and supply vessels in ice prone regions are subject to environmental loading from various forms of glacial ice fragments. Iceberg/bergy bit impact load with offshore structures is an important design consideration but a research gap exists in the study of the viscosity dominated, very near field region, where phenomena such as negative wave drift force (against the direction of propagation of the waves), shadowing, change in added mass, hydrodynamic damping, eccentric impact etc. have been observed in previous studies.
In order to better understand and quantify the hydrodynamic effects on small ice masses, a two phase, experimental and numerical, study has been conducted. Physical model experiments were conducted in the Ocean Engineering Research Center (OERC) at Memorial University of Newfoundland (MUN). In the first phase, experiments were conducted to investigate changes in wave loads on ice masses at different separation distances from the structure. The experimental results show that the distance to wavelength ratio dictates the corresponding wave loads in horizontal and vertical directions. The mean drift force in the horizontal direction becomes negative (against the direction of wave propagation) for most cases, when the body is close to the structure. As the body is positioned closer to the structure, the non-dimensional RMS forces in the horizontal direction decrease, and the non-dimensional RMS forces in the vertical direction increase.
In the second phase, experiments were conducted to investigate the change in wave induced motions for different sizes of free floating ice masses approaching a fixed structure. The experimental results of motion data show excellent correlation with the force data gathered in the first phase. Similar to previous studies, the separation distance to wavelength ratio is shown to dictate the corresponding wave induced motions. As the body gets close to the structure, the surge motion slows and at the same time the heave motion is increased. Some experiments are also conducted to understand the motion behaviour in irregular waves. The significant wave heights showed a standing wave pattern generated by the superposition of incident and reflected peak frequency wave. Further analysis showed that the significant heave forces and motions will increase and significant surge forces and motions will decrease as the body gets close to the structure.
Numerical simulations were conducted using RANS based commercial CFD code Flow3D. Flow3D showed promising results when compared against the force measurements demonstrating the highest and lowest forces at different locations from the structure. For the motion simulations, the velocity changes at node and antinode locations in front of the structure are well captured by the numerical simulations. The challenges lie in the proper modeling of geometry and mass properties of the physical model considering the limitations of computational resources. The simulation results for irregular waves show the capability to simulate random waves and force and motion results in irregular waves are also reasonable showing the expected trends.


identifier: Cui, Xue <https://research.library.mun.ca/view/creator_az/Cui=3AXue=3A=3A.html>   (2017) Lattice Boltzmann method and vortex methods for fluid animation.  Masters thesis, Memorial University of Newfoundland.

abstract:
Most fluid solvers for visual effects are based on splitting Navier-Stokes (N-S)
PDEs. In the N-S solver, a projection step is often applied to correct the minor errors
from advection and produces divergence free constraint for incompressible fluid flow in
order to output flows with swirls. It is one of the key steps in classic N-S solver, giving
us turbulence visual effects. We follow the conventional N-S based solver, but mainly
focus on a growing popular method named as LBM (Lattice Boltzmann Method).
Many visual effect researches have proposed to utilize LBM's straightforward parallelizable
feature but neglected its capabilities for generating appealing visual effects.
By investigating popular vortex methods of classic N-S solvers, we presented hybrid
methods for enriching visual complexity for LBM. They require additional steps for
vortex calculation and boundary conditions processing on macroscopic and microscopic
levels, but are able to provide rich details for the simualtion with acceptable
computation cost. Compared to introducting a complex turbulence model for LBM,
our approach is easy-to-implement and straightforward.


identifier: Gower, Heather K. <https://research.library.mun.ca/view/creator_az/Gower=3AHeather_K=2E=3A=3A.html>   (2017) The consideration of personal qualities in admissions for Canadian master's counselling and counselling psychology programs.  Masters thesis, Memorial University of Newfoundland.

abstract: Research demonstrates the need for counsellors and psychologists to possess certain personal qualities to be effective practitioners (e.g., Jennings & Skovholt, 1999). However, the degree to which some of these characteristics can be taught during graduate school is questionable (Pope & Kline, 1999), and, thus, some researchers argue that personal qualities are an important factor to assess during the admissions process (Halinski, 2009; McCaughan & Hill, 2015). However, little is known about how personal quality considerations are incorporated into the admissions process for Canadian master’s programs in counselling and counselling psychology. This study serves as a preliminary exploration of how a subset of Canadian faculty consider and assess personal qualities during admissions reviews for said programs. Participants were interviewed to explore the counsellor personal qualities deemed important by each individual as well as how such considerations currently, and might ideally, play into admissions decisions. Themes arising from these semi-structured interviews and their implications for future research and practice are explored.


identifier: Frank, Beatrice <https://research.library.mun.ca/view/creator_az/Frank=3ABeatrice=3A=3A.html>   (2012) The conflict-coexistence continuum: a human dimension case study on wild boar management in Italy.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
The expansion of human settlement into natural landscapes and the arrival of
species into rural and urban areas have led to frequent human-wildlife interactions.
Although such interactions can turn into positive or negative experiences for humans and
wildlife, researchers have conventionally looked at the negative side, focusing on
conflicts. This emphasis on conflict has represented a constraint to wildlife conservation ;
authorities have focused on reducingnegativeexperiences,ratherthanonincreasing
positive interactions between humans and wildlife.
The overarching goal of this dissertation is to address this gap by bener
encompassing coexistence in conservation. Thus, this dissertation explores the concepts
of conflict and coexistence as related events along a continuous line, with major conflicts
positioned at one end, and the integration and acceptance of wildlife within the human
landscape at the other. The conflict-coexistence continuum was developed using a
framework that examines negative to positive feelings toward species in wildlife
management and conservation. The specific objectives of this study investigate how the
conflict-coexistence continuum and framework were shaped by: I)theformatofthescale
used to explore this concept 2) the location in which participants' live; and 3) the
perceptions participants hold toward wildlife and its management. To investigate these
three objectives and implement the framework, a case study using wild boar was
completed in two protected areas of central Italy. Quantitative face-to-face interviews were carried out about wild boar and wild boar management in Circeo National Park (n=
801) and the Regional Nature Reserve Nazzano-Tevere-Farfa (n= 452).
While the emphasis on conflict outlined in this dissertation is notoriginal,theidea
of integrating conflict and coexistence along a continuum as a way to achieve
conservation is new. As demonstrated in this dissertation, conflict and coexistence are
related concepts influenced by factors such as the location of participants, their
perception of species, and their specific interactions with wildlife. It is shown that
researchers and managers should not simply focus on addressing negative experiences
between humans and wildlife. They should also be creative and innovative in using
coexistence interactions to increase the public's willingness to tolerate wildlife in their
proximity.


identifier: Zhang, Nan <https://research.library.mun.ca/view/creator_az/Zhang=3ANan=3A=3A.html>   (2017) A new semi-analytical streamline simulator and its applications to modelling waterflooding experiments.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
Reservoir simulation is a tool to model the fluid flow in a reservoir over time. Streamline simulation
has been proven to be an efficient approach for fine-scale geology models. With the
development of engineering applications of streamline methods, researchers are now facing
more challenges, for example, 1) tracing streamlines in structurally complex reservoirs; 2)
improving the computational accuracy and efficiency for modeling transport problems. This
research offers significant potential to meet these challenges. More specifically, this research
is mainly focused on the development of a new three-dimensional, two-phase streamline
simulator (using Matlab) that can model real physical displacement processes in a fast and
accurate manner.
This streamline simulator solves the pressure and saturation equations sequentially. First,
streamlines are traced by pressure distribution approximations; and then transport problems
are solved along streamlines.
This new streamline simulator applies new semi-analytical methods to trace streamlines,
including the Bilinear, Trilinear and Cubic methods. These methods generate streamlines
based on pressure distribution approximations using piece-wise polynomials. Then the velocity
field, streamline trajectory functions, and time-of-flight (the time a particle takes to
travel along a streamline) are derived accordingly. The new streamline method and Pollcok’s
method are systemically compared via pressure and velocity approximations, plus streamline
determinations. Through these comparisons, the new methods are proven to be more
accurate than Pollock’s method, especially in heterogeneous problems and/or when grid
resolution is low. When certain initial conditions are imposed, this new streamline simulator applies a Riemann
approach to solving transport problems along streamlines. Standard streamline simulators
apply the classical Riemann solution under constant total flow rate conditions. However,
the boundary conditions can also be specified by constant injection and production
pressures. In this case, the flow rate varies with time, and a new semi-analytical Riemann
solver presented in this thesis can be applied to map the Riemann solution along streamlines
in terms of time-of-flight. Through a series of case studies using different reservoir properties,
the abilities of the new streamline simulator to give sufficiently accurate solutions for
homogeneous, heterogeneous, and anisotropic problems are demonstrated. Moreover, a large
mobility ratio range (0.5 to 50) is tested to evaluate the performance of this streamline simulator.
Through comparisons with a standard reservoir simulator (Eclipse100, Schlumberger)
in these cases studies, it is demonstrated that this new streamline simulator significantly enhances
the calculation speed and improves the accuracy of simulations when the underlying
assumptions are valid.
Finally, the ability of the new simulator is validated and demonstrated by modeling physical
waterflooding displacements. This is the first time that waterflooding experiments are performed
under constant differential pressure boundaries in a two-dimensional heterogeneous
macro-model. Two experiments with the same reservoir and fluid properties are performed
under different boundary conditions. The new simulator is applied to history match and simulate
these two experiments. The predicted and observed results show excellent agreement.
The flow behavior of the fluid under a constant pressure boundary is also well understood by
using the visual power of the simulator. We conclude that the new streamline simulator is
very efficient and accurate in physical waterflooding processes simulations when the viscous
force dominates the flow.


identifier: Rendell, Evan <https://research.library.mun.ca/view/creator_az/Rendell=3AEvan=3A=3A.html>   (2016) An investigation of the effectiveness of a partial cladding pattern on Aluminum 7075 T651.  Masters thesis, Memorial University of Newfoundland.

abstract:
One of the primary motivations in developing new materials for the aerospace industry is maximizing specific strength. An often conflicting goal in developing new materials is maximizing corrosion resistance. This is due to the realities of aging aircraft and the rising costs of inspection and maintenance. Currently all aluminum sheet and plate used in the aerospace industry is Alclad to increase corrosion resistance. The Alclad layer can make up 5% of the total plate thickness and does not carry any load. The goal of this work is to show that weight savings in aircraft structures can be achieved by substituting a partial cladding pattern for the continuous Alclad layer while maintaining equivalent corrosion resistance.
In this work, the corrosion resistance of aluminum 7075 T651 in the Alclad, partially clad and bare forms were compared after corrosion exposure in an acidic salt spray cabinet test. The degree of corrosion was then evaluated through visual inspection, analysis of cross-sections, tensile test and fatigue tests. Following this, single clad spot panels with varying spot sizes were produced and corroded to investigate if there is a more efficient clad spot size than what was selected for the medium sized test panel.
After corrosion exposure, severe to moderate exfoliation corrosion was observed on the unprotected medium sized test panel, light general corrosion was observed on the upper section of the partially clad panel and patches of corrosion not penetrating past the clad layer were observed on the Alclad panel. Tensile and fatigue tests showed that the Alclad and partially clad tests panes resisted degradation of mechanical properties due to corrosion similarly well while outperforming the bare test panel.


identifier: Kilby, Robert <https://research.library.mun.ca/view/creator_az/Kilby=3ARobert=3A=3A.html>   (2017) An exploratory study of school to work transition experiences of applied science and technology students in southern Ontario.  Masters thesis, Memorial University of Newfoundland.

abstract:
This paper details a qualitative study undertaken on a small sampling of community college graduates. The graduates’ pathways from school to work have been studied in relation to existing scholarly transition models.
The author was able to discover only a small number of studies dealing with the college to work transition experience of applied science and technology students, no scholarly papers were found with respect to this student population in Ontario, Canada.
This study was an inquiry into the college to work transition experiences of a purposive sample of graduates from regional community colleges in Southern Ontario. Sixteen semi-structured qualitative interviews were conducted with recent graduates who had completed their studies within the field of applied science and technology.
Several themes emerged with respect to the school to work transition for the participants of this study. Co-op learning experiences were shown to provide a significant boost towards a smooth transition process. Networking, in the case of this study, was considered independently of co-op and also emerged as a valuable resource with the potential for workplace contacts and links to employment. The study also found that all subjects were aware of available career counselling resources, and many students chose not to partake. A few subjects made extensive use of career counselling and found a substantial payback for their efforts.
The participants of this study have transitioned from school to work through a variety of pathways which approximately matched theoretical school to work transition models. The transitions were unique to each student, there was no one size fits all transition process. The findings of this study could be used as a baseline for future studies to compare and contrast against, a growing body of knowledge will enable the refinement of college programs, policies and services, to the benefit of future college students.


identifier: Hayes, Ashli H. <https://research.library.mun.ca/view/creator_az/Hayes=3AAshli_H=2E=3A=3A.html>   (2017) Early autobiography memory specificity, depression and trauma in older adults.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
The overgeneral memory (OGM) bias, that is, the reduced tendency to produce
specific memories, has been shown to be related to affective symptoms in adults across
the age range. Specifically, OGM has been shown to be related to both current and past
depression as well as trauma-related disorders. There has been a paucity of research
concerning the OGM bias in older adults, and the current study aimed to address this gap
in the literature. In addition, early memory has been shown to be important to
psychological functioning in terms of the development of the life story, goal-directed
behaviours and problem solving. This facet of memory has not yet been investigated in
the context of the OGM bias in older adults. Thus, this represents another important gap
addressed by the current study, which investigated the relationship between early OGM,
as measured by the early Memory Fluency Task and the earliest Detailed Memory Task,
and the following clinical variables in a sample of community-dwelling older adults
between the ages of 50 and 75 years (N = 72): cognitive functioning (MoCA), current
depressive symptoms (BDI-II), lifetime history of depression (SCID-IV-Current and Past
Major Depressive Episodes), history of trauma (THQ), current trauma symptoms (IES-R)
and general psychopathology (BSI). The results of the current study suggest that earliest
OGM is related to lower levels of cognitive functioning, as well as higher number of past
experienced traumatic events and a history of Major Depressive episodes. This study also
has implications for categorization of OGM. The implications of relevant findings are
discussed in terms of future OGM research and clinical applications.


identifier: Walsh, Patrick <https://research.library.mun.ca/view/creator_az/Walsh=3APatrick=3A=3A.html>   (2017) Post-secondary educators' perspectives on EFL assessment methods in South Korea.  Masters thesis, Memorial University of Newfoundland.

abstract:
In Korea there has been a long tradition of using standardized tests to facilitate
advancement. With the drastic increase in English and a Foreign Language (EFL) studies
in the country, English proficiency tests also gained popularity as a way to differentiate
ones English ability. High scores on English proficiency tests became a requirement for
any person applying for work in many of the major corporations and educational
intuitions in Korea. Popular proficiency tests such as the Test of English for International
Communication (TOEIC), and the Test of English as a Foreign Language (TOEFL) have
become a major concern for students in post-secondary institutions as gaining high grades
on these tests has a large impact on their future prospects. Research on TOEIC and
TOEFL testing tends to have a student centric approach to data collection. This research
explores the feelings, perceptions, and opinions of post-secondary EFL educators in
Korea and the effects English proficiency testing has on the Korean post-secondary
environment. The educators were asked about their experience with Korean testing
culture, their opinions of proficiency tests such as TOEIC and TOEFL, and the perceived
impact these tests have on students, curriculum, or teaching styles. Educators were also
asked about teaching methods and assessment techniques that they saw as most beneficial
to language acquisition. Email interviews were held with eighteen post-secondary EFL
instructors who teach or have taught in the Korean post-secondary system. The findings
show educators believed that there is a general focus on test scores over fluency and they
question the ability of the prominent proficiency tests to accurately gauge ones language
abilities. These tests and the importance they have for students in Korea was seen to cause
much negative washback such as stress, anxiety, and depression and the for-profit nature
of these tests was criticized by participants. The negative attitude displayed raise
questions about the effectiveness of the current systems and educators argued that
alternative teaching and assessment strategies that utilize communicative skills and
engage their students to interact in English should be researched to help improve overall
fluency in the post-secondary environment.


identifier: Lv, Ze <https://research.library.mun.ca/view/creator_az/Lv=3AZe=3A=3A.html>   (2017) Improvement of high-productive biosurfactant producers through ultraviolet mutation and genome shuffling.  Masters thesis, Memorial University of Newfoundland.

abstract:
Biosurfactants have been widely considered as promising alternatives to chemical
synthetic surfactants since they are effective, biodegradable and less toxic. Despite having
these attractive advantages, compared with their synthetic counterparts the lack of powerful
biosurfactant-producers has been a challenge in application. To help fill the gap, this study
aimed at developing high-productive biosurfactant producers. Mutant M25 were developed
from Rhodococcus through UV irradiation, which showed excellent results with a CMD of
225 and dispersing abilities competitive with the most commonly used chemical synthetic
surfactant for oil dispersion (Corexit 9500A). GS43 was a recombinant improved from
Halomonas by the recently developed Genome Shuffling method. GS43 exhibited 4 times
more effective at the 10% Broth/Oil rate and GS43 was 100% greater than in the E24 wild
type. GS43 also showed more stable results over a wide range of temperature (5 -70 ºC)
and pH (1-12), as well as being salt-tolerant and higher emulsion effects with n-hexadecane,
mineral oil, crude oil, toluene, dodecane, Iso-octane, olive and corn oil. Moreover, GS43
possessed both emulsifying and surfactant (27.3 mN/m) properties.


identifier: Zhang, Wenbin <https://research.library.mun.ca/view/creator_az/Zhang=3AWenbin=3A=3A.html>   (2015) Using the Machine Learning Approach to Predict Patient Survival from High-Dimensional Survival Data.  Masters thesis, Memorial University of Newfoundland.

abstract:
Survival analysis with high dimensional data deals with the prediction of patient
survival  based  on  their  gene  expression  data  and  clinical  data.   A  crucial  task  for
the  accuracy  of  survival  analysis  in  this  context  is  to  select  the  features  highly
correlated with the patient’s survival time.  Since the information about class labels
is hidden, existing feature selection methods in machine learning are not applicable.
In  contrast  to  classical  statistical  methods  which  address  this  issue  with  the  Cox
score, we propose to tackle this problem by discretizing the survival time of patients
into a suitable number of subgroups via silhouettes clustering validity.  To cope with
patient’s  censoring,  we  use  “k-nearest  neighbor”  based  on  clinical  parameters  that
are truly associated with survival time.  These are selected using penalized logistic
regression  and  the  penalized  proportional  hazards  model  with  the  EM  algorithm.
They  are  then  used  to  estimate  censored  survival  time.   Next,  the  estimated  class
label is combined with feature selection to identify a list of genes that are correlated
with the survival time and classifiers are applied to this subset of genes to determine
which subtype is present in a future patient. By doing so, we expect that the identified
subgroups are not only biologically meaningful but also differ in terms of survival.
The effectiveness and efficiency of the proposed method are demonstrated through
comparisons with classical statistical methods on real-world datasets and simulation
datasets.


identifier: Persaud, Phyllis Marie <https://research.library.mun.ca/view/creator_az/Persaud=3APhyllis_Marie=3A=3A.html>   (1976) An individualized remedial reading program for ten grade three boys.  Masters thesis, Memorial University of Newfoundland.

abstract:
This internship was concerned with developing and implementing an individualized remedial reading program
for ten grade three boys. The students were selected for the program on the basis of their scores on a survey test,
information obtained from their cumulative records, and their teachers' observation of their performance. The
program was carried out during the school year September, 1975, to June, 1976, with the intern providing reading
instruction for eighty minutes each day.

The major components of the program were self-selection of books, independent reading, skill instruction,
follow-up activities, individual conferences, sharing time, and students' recording of the books they read. The
daily schedule was always flexible. On some days it included all of the above activities but on other days only a few.

To provide the students with appropriate reading material, high interest-low vocabulary books, information
books and selections from children's literature were borrowed from the school library and public libraries.
From these they selected books for independent reading. Their comprehension of the books was revealed in their
discussions with the intern during individual conferences and in their follow-up activities. Skill instruction was
provided both in small groups and individually to help the students improve their reading ability.

Changes in the students' reading achievement and attitude provided evidence that the internship had been
effective. The mean scores obtained on the pretest and posttest administrations of two standardized tests showed
gains of 1.2 years in reading comprehension and 1.6 years in word recognition. When compared with the anticipated
gains, these were statistically significant at the .01 level. Observations by both the intern and parents indicated
that the students had developed a more positive attitude towards reading and read more widely than they
had done prior to the internship.


identifier: Amin, Al <https://research.library.mun.ca/view/creator_az/Amin=3AAl=3A=3A.html>   (2017) Design, development and control of a managed pressure drilling setup.  Masters thesis, Memorial University of Newfoundland.

abstract:
Drilling in challenging conditions require precise control over hydrodynamic parameters
for safer and efficient operation in oil and gas industries. Automated managed
pressure drilling (MPD) is one of such drilling solution which helps to maintain operational
parameters effectively over conventional drilling technique. The main goal
is to maintain bottomhole pressure between reservoir formation pressure and fracture
pressure with kick mitigation ability. Real life MPD system has to confront nonlinearity
induced by drilling fluid rheology and flow parameters. To obtain a better
understanding of this operation, a lab scale experimental setup has been developed.
Reynolds number and pressure drop per unit length were considered to obtain hydrodynamic
similarity. A vertical concentric pipe arrangement has been used to represent
the drill string and annular casing region. A linearized gain switching proportional integral
(PI) controller and a nonlinear model predictive controller (NMPC) have been
developed to automate the control operation in the experimental setup. A linearizer
has been designed to address the choke nonlinearity. Based on the flow and pressure
criteria, a gain switching PI controller has been developed which is able to control
pressure and flow conditions during pipe extension, pump failure and influx attenuation
cases. On the other hand, a nonlinear Hammerstein-Weiner model has been
developed which assists in bottomhole pressure estimation using pump flow rate and
choke opening. The identified model has been integrated with a NMPC algorithm
to achieve effective control within predefined pressure and flow constraints. Lastly, a
performance comparison has been provided between the linearized gain switching PI
controller and NMPC controller.


identifier: Andrews, Phillip Gordon Patrick <https://research.library.mun.ca/view/creator_az/Andrews=3APhillip_Gordon_Patrick=3A=3A.html>   (2017) The role of the Pygopus chromatin modulator in cell growth and division.  Doctoral (PhD) thesis, Memorial University of Newfoundland.

abstract:
In adults, precisely regulated gene expression results in strict control of cell proliferation required for healthy tissues. Abnormal gene expression, on the other hand, can result in uncontrolled cell proliferation and tumor formation. Gene expression largely depends on changes to chromatin structure; it is remodeled in response to epigenetic stimuli to accommodate transcriptional activation and/or repression. Chromatin remodeling, therefore, is very broadly fundamental to normal and aberrant cellular function. Here, my research has focused on a key epigenetic effector that facilitates gene activation, called Pygopus 2 (Pygo2). Pygo2 functions primarily to link histone acetylation to active gene expression, by bridging transcription factors and modified histone proteins at gene promoters to histone acetyltransferases.
In this thesis, I first examined the role of Pygo2 in the canonical Wnt signaling pathway and found that Pygo2 is transiently and specifically acetylated when bound to the activated -catenin complex. Acetylation of Pygo2 correlated with a displacement of nuclear Pygo2 to the cytoplasm, suggesting that acetylation of Pygo2 may control the recycling of -catenin complexes, following target gene activation. Upon examination of the broader role of Pygo2 beyond Wnt signalling, I found that it promotes ribosomal (r)RNA transcription within the nucleolus. In this context, Pygo2 was required for histone H4 acetylation at the rDNA promoter, suggesting a novel involvement of Pygo2 in rRNA transcription. Finally, using a whole genome approach, I discovered that Pygo2 acts as a pleiotropic chromatin effector, revealing a function for Pygo2 in gene expression required for segregation and bi-orientation of chromosomes during mitosis. Further analysis identified an interaction between Pygo2 and c-myc oncoprotein, suggesting that the chromatin effector Pygo2 may cooperate with c-myc, directing the expression of growth and division genes.
Taken together, my findings suggest that in association with other important regulators of growth in cancer, Pygo2 facilitates gene expression by interpreting and relaying positive epigenetic marks on histones, which is essential to promote the expression of proliferation-related transcriptional programs.