contributor:
Crocket, J.H.
Geology

abstract: Title: A Structural-Geochemical Investigation of a Mineralized Breccia and Associated Vein System at the Contact of the Strathy Batholith and the Temagami Greenstone Belt, Strathy TWP., Ontario., Author: Mark E. Baknes, Location: Thode

abstract:
A 400 by 80 m tabular chalcopyrite-molybdenite
mineralized breccia body and associated vein system, are
hosted in basic tholeiitic metavolcanics of the Temagami
greenstone belt, adjacent to the contact with the Strathy-Chambers
batholith.

Mapping of the breccia and enclosing volcanics was conducted
on a 400 by 600 m grid at a scale of 1:500. Features of the
breccia measured were, fragment size, proportion of matrix,
aspect ratio of fragments, attitude of tabular fragments and
the thickness of plagioclase rims on fragments. Mapping of
the remaining 4 km^2 study area at a scale of 1:2000
established the nature of the volcanic-Strathy-Chambers
batholith contact zone and the extent of quartz veining and
related structural features.

Structural orientations measured were primarily of
joints, veins, breccia fragments, faults and foliations.
Joint densities were also recorded to establish any spatial
relation between joint density and proximity to the breccia.

Major, trace and rare earth element analysis were
conducted on a suite of granitic samples away from the
breccia, toward the core of the batholith. A suite of the
tholeiitic basalts that host the breccia and a collection of
basalt breccia fragments were analysed for major and trace
elements.

The dominantly quartz cemented breccia varies in style
from zones of pervasive breccia, where fragmentation is
extensive, and the breccias are matrix supported, to areas
of low matrix incipient breccia, where the breccias contain
large (> 30 cm) unrotated blocks. Plagioclase feldspar
often forms selvages on fragments as well as in veins within
close proximity to the breccia. Sulphide mineralization is
concentrated in breccias without plagioclase and in areas of
relatively small fragment size. All fragmental material is
of the basaltic host and these fragments are exclusively
angular, and are often tabular. No evidence of fragment
abrasion or matrix rock flour were noted. These features,
together with the tabular unrotated fragments and a lack of
rebrecciation indicates brecciation was relatively
instantaneous, and passive in so much as fluid streaming was
not important.

Two and possibly three steeply dipping joint
populations were defined. One set essentially parallels the
long axis of the breccia, the other cuts accross the breccia
at a high angle. Analysis of joint densities suggests that
the density of joints increases with proximity to the
breccia. This feature and the observation that tabular
fragments are orthogonal to the joint sets suggests that the
joints were the failure or tensile fractures along which
brecciation occurred.

Quartz veins trend toward 071/85NW, parallel to, and
perhaps related to a significant shear zone on the east side
of Net Lake. Within approximately 150 m of the breccia
veins have a much more variable orientation suggesting that
the more regional stresses controlling veins were overridden
by forces related to breccia formation.

Gresens calculations for the identification of element
mobility indicated that volcanic breccia fragments
associated with sulphide mineralization and biotite
alteration had experienced K and Rb metasomatism similar to
that found in porphyry coppper deposits.

Major, trace element, and REE modelling indicate that
compositional variation identified in the intrusive suite
resulted primarily from plagioclase fractionation, with
minor fractionation of biotite hornblende, ilmenite,
magnetite, sphene, apatite and allanite. Granitic rocks are
more differentiated and display fluid saturation textures
toward the contact zone opposite the breccia, suggesting
that this zone represents the apical portion of a
differentiated and fluid saturated magma chamber.

Brecciation is thought to have been caused by second
boiling processes related to differentiation of the Strathy-Chambers
batholith that subsequently caused tensile failure
and brecciation of the overlying volcanic roof rocks. Based
on the similarity of vein-breccia mineral assemblages to
contact metamorphic assemblages the breccia and veins likely
formed during peak metamorphism (475-550 °C) at a depth of
less than 8-10 km.

abstract: Thesis

abstract: Master of Science (MS)


abstract: Title: A Base and Precious Metal Study of BIF Associated Interflow Metasediments, Kirkland Lake, Ontario., Author: Albert G. Chong, Location: Thode

abstract:
The interflow sediments studied are part or the
Boston iron range in the Larder Lake Group near
Kirkland Lake, Ontario.
Due to the proximity or the Lebel stock, transitional
contact metamorphism between
hornblende-hornfels Facies and albite-epidote-hornfels
facies has been inferred for the study area. A later
regional overprint or lower greenschist Facies has also
been interpreted.

Base metal mineralization in the area is Zn rich.
However, it is not genetically related to the BIF.
Instead, the base metal mineralization may have been
introduced during the intrusion or the Lebel stock by
metasomatic processes associated with contact metamorphism.

Anomalous Au abundances ( > 10 ppb) in the study
area is inferred to be associated with sulphide
mineralization and possibly active carbon. Sulphide
samples associated with anomalous Au concentrations usually
display the annealing recrystallization of fine grained
cataclastic pyrite. A statistically positive correlation
between Zn and Au was also determined. This may imply that
the Au was introduced synchronously with or post
intrusion or the Lebel stock. Anomalous Au values in
the chemical sediments were noted to coincide with high As
and Sb concentrations.

abstract: Thesis

abstract: Bachelor of Science (BSc)


contributor:
Reeds, L.G.
Geography

abstract: Title: Agricultural Underdevelopment in Caistor Township, Author: Benard W. Darnel, Location: Thode

abstract:
The purpose of this study is to describe and explain
the extent of agricultural underdevelopment in Caistor Township.

Full credit for the author's incentive to investigate
this area must go to Dr. L.G. Reeds of McMaster University,
who in 1964 conducted a survey of the agricultural conditions
in the Niagara Peninsula, on the basis of which a more detailed
study of several areas, including Caistor Township, seemed
warranted.

The information for this study originated from a
variety of sources. The most important of these was direct
observations in the field, which after a brief reconnaissance
survey in the early part of May, were carried out systematically
during the months of June, July, and August of 1966. Interviews
were conducted in all parts of the township, in addition
an attempt was made to interview all people in four sample
block areas. It is estimated that out of a total of 165
interviews, 90 involved the owners of "commercial farms";
other people interviewed were retired farmers, non-farming
residents, township officials, clergy men, and store owners.

Field observations provided the basis for the
Land Capability Map (Fig.3), for the map showing "Quality of
Land use" (Fig. 5), while information about the distribution
of non-farm dwellings (Fig . 4) and the location of "Century
Farms" (Fig. 2) was obtained from the township office and
from a 4-H club member respectively.

Other pertinent data was provided by the Dominion
Census Report for 1961, which is the most recent source of
information on farm classification, farm income, landuse,
and values of agricultural products sold. Finally, the
Soil Survey of Lincoln County, and the Physiography of
Southern Ontario proved to be useful guides in the assessment
of the physiographic conditions of the township.

The methodology employed in this study was selected
so as to best facilitate the attainment of the stated objective,
but limited time for investigation and lack of sufficient
quantitative data about individual farms precluded the use
of statistical methods.

The study is divided into eight chapters. Chapters
one, three and four deal exclusively with the physical conditions
and with related problems, while chapter two gives
a brief account of relevant historical factors. Chapters five
and six examine the status of agricultural development in
the township, the findings of which are evaluated in chapter
seven. The final chapter contains the summary and conclusion.

abstract: Thesis

abstract: Bachelor of Arts (BA)


contributor:
McNutt, R.H.
Geology

abstract: Title: Seawater Alteration of Pillow Lavas, Bay of Islands Ophiolite Complex, Western Newfoundland, Author: Michael T. Franklyn, Location: Thode

abstract:
The pillow lavas of the lower Crabb Creek area or the Bay of Islands Ophiolite complex exhibit geochemical and petrographic characteristics
similar to metamorphosed mid-ocean ridge basalts. Depletions of Ca and Mg and the enrichment or K, P, Na, Si and H2O are the result of hydrothermal alteration and the metasomatic influence seawater on fresh basalts.

All samples exhibit typical low grade, greenschist Facies metamorphic mineral assemblages. 'Fresh', moderately altered and
severely altered suites can be recognized by the degree or degradation of the phenocryst and matrix phases. Immobile trace elements show
these metabasalts to originally be ocean-floor tholeiites .

abstract: Thesis

abstract: Bachelor of Science (BSc)


contributor:
Walker, R.G.
Geology

abstract: Title: Sedimentology and Allostratigraphy of Falher Memebers A and B of the Lower Cretaceous Spirit River Formation, Northwestern Alberta, Canad, Author: Richard G. Rouble, Location: Thode

abstract:
The 10 to 30m thick coarsening-upward sandbody successions of Falher Members A and B of the Lower Cretaceous (Early Albian) Spirit River Formation in northwestern Alberta are each split by a mudstone tongue at the seaward end. This mudstone tongue can be correlated landward with an abrupt grain size change within the main sandbody succession, where cross-bedded sandstones or conglomerate overlie swaley cross-stratified sandstones. The grain size change can be correlated with the top of a regionally extensive coal landward of the sandbody. The mudstone tongue and grain size change represent a marine flooding surface that splits each existing Falher member into two separate allostratigraphic units. Each of the four allomembers now recognized (A1, A2, B1, B2) was deposited as a barrier-strandplain system.

The transgressive systems tract is preserved as barrier sands, transgressive successions consisting of coastal plain to lagoonal deposits, and transgressive lag deposits. The lagoonal and lag deposits were partially
preserved seaward of the barrier during shoreface retreat. The transgressive systems tract also includes an estuary fill and onlapping transgressive offshore storm deposits.

The highstand systems tract comprises a shoreface succession which prograded as a strandplain formed of sandy and gravelly beach ridges. Backspit lagoons are locally encased in the shoreface sands. In most allomembers, the beach conglomerate trends parallel to the barrier, on the seaward side.

In existing Falher member B, a lowstand systems tract is represented by a south-north trending channel incision (Allomember B3) that cuts into
shoreface deposits of Allomembers B1 and B2. This channel incision was
probably feeding a lowstand wedge to the north.

Each transgressive-regressive allomember has an estimated duration of
approximately 305,500 years. The changes in relative sea level during
deposition of the allomembers may have been controlled by combined allocyclic and autocyclic processes.

abstract: Thesis

abstract: Master of Science (MS)


title: Aspects of the Geology in the Peter Strides Pond Area, Southwestern Newfoundland

contributor:
Clifford, Paul M.
Geology

subject: Geology, Peter Strides Pond Area, southwestern, Newfoundland, foliation parallel, quartz, compositions

abstract:
 The Peter Strides Pond study area, approximately 150 km^2, is located in the Southern Long Range Mountains in southwestern Newfoundland. It lies at the southern margin of the Paleozoic Central Mobile Belt in the Dunnage tectonostratigraphic zone. A felsic intrusion, granoblastic gneiss, heterolithic conglomerate and basalt form foliated, linear bodies across the study area parallel to the regional, northeast striking, structural grain; gabbro, diabase and rhyolite have non-linear exposure and no internal fabric. Two parallel mylonite zones traverse the study area. The Victoria River Shear Zone (VRSZ) to the north and the Peter Strides Pond Shear Zone (PSPSZ) to the south are concordant with the regional fabric and separate domains which increase in metamorphic grade from lower greenschist in the northwest to upper amphibolite facies to the southeast. Veins and lenses of variable form and composition are observed in several lithologies but the focussed occurrence of milky white, foliation parallel quartz veins in both the VRSZ and the felsic pluton is significant to these
units.

 A tentative stratigraphic succession for the study area utilizes regional correlations, radiometric ages and fossil evidence because limited exposure does not reveal contacts between adjacent lithologies. Basalt of the Victoria Lake Group and gneiss of the Bay du Nord Group are the oldest units in the area. Conglomerate unconformably overlies the Victoria Lake Group and contains volcanic and sedimentary clasts derived from the underlying group. Mafic to felsic plutonic igneous rocks intrude volcanic rocks of the Victoria Lake Group. Undated gabbro, diorite and diabase may be coeval with Devonian adamellite-granodiorite.
Parallel shear zones are concordant with the regional structural grain and follow lithologic contacts closely. Megacrystic granite cross-cuts PSP mylonite, adamellite and Bay du Nord gneiss. It is the youngest unit in the study area. The study area's tectonic framework represents a compressional environment which dominated during, and continued after Iapetus closure. Mafic volcanic rocks adjacent to ophiolite complexes represent back arc basins preserved via obduction. Continued compression was accomodated by crustal thickening through reverse, northwest directed, thrust faults. The inhomogeneously thickened crust provided a host of potential magma compositions to be intruded locally.

abstract: Thesis

abstract: Master of Science (MSc)


title: SCANNING TRANSMISSION X-RAY AND FLUORESCENCE MICROSCOPY OF LIPID BILAYERS

contributor:
Hitchcock, Adam
Moran-Mirabal, Jose
Chemistry

abstract: Cationic antimicrobial peptides (cAMPs) are of interest as a possible solution to the problem of bacterial resistance to antibiotics. In order to facilitate identification of useful cAMPs, the mechanism of action in killing prokaryotic cells is of interest. Robert Hancock (UBC) has proposed that charge interaction between cAMPs and the negatively-charged bacterial membrane is a major factor that contributes to the disruption of the bacterial membrane. The goal of this thesis is to contribute to the development of a method based on scanning transmission X-ray microscopy (STXM) to investigate the electrostatic interaction hypothesis as the method by which cAMPS interact with negatively charged bacterial membranes, using fluorescence microscopy (FM) as a guide. Methods were developed to generate phase-segregated lipid bilayers as model membranes on the silicon nitride membranes. C 1s, N 1s and O 1s X-ray absorption spectra of 3 lipid species - 1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine (DOPC), 1,2-dioctadecanoyl-sn-glycero-3-phosphocholine (DSPC), and 1,2-di-(9Z-octadecenoyl)-3-trimethylammonium-propane (chloride salt) (DOTAP) were obtained to be used as reference standards in future studies. FM and STXM were used to map the saturated and unsaturated domains in dried lipid bilayers exhibiting phase segregation. Attempts were also made to image the lipid bilayers under hydrated conditions using both static and flow cells. Efforts to develop a flow cell for STXM using 3D printing are outlined. The potential to evolve this line of research to enable systematic studies of protein and peptide interactions with lipid bilayers under static and dynamic conditions is discussed.

abstract: Thesis

abstract: Master of Science (MSc)


title: Beverly Township the study of a Rural Area

contributor:
Thompson, H.R.
Geography

abstract: Title: Beverly Township the Study of a Rural Area, Author: Richard D. McQueen, Location: Thode

abstract:
Geography is a scientific subject dealing with man and his physical environment. The task of the geographer is to determine what effect the physical environment has on man and how man is best able to adapt himself to his particular environment.

Man's environment is important in all of his activities. This is especially true in the case of the farmer. Geological and geomorphological forces sculpture the shape of his land, climatic and biological forces form the soil. Once man starts working the land these forces continue to influence him n various ways. How well he adapts himself and his farming methods to the physical factors helps to determine whether he will be a success or a failure. The farmer's human environment is as important as his physical one. He is dependent on other for supplies and for a market for his goods.

 The agricultural region is a very significant field for the geographer to study for here he can see an in his environment without many of the technological devices of modern civilization that tend to remove or protect man from his natural setting. Thus the object of this thesis is to study rural area, Beverly Township, and determine if man has made a suitable adjustment with his environment, both physical and human.

In a study of this type we must look at the physical nature of the region before we study man's activities. In chapter one we study geomorphological history of the township that affects present landscape. We do not delve too deeply into the subject for fear of getting lost in irrelevancies.

After the physical setting has been studied it is necessary to see how man has developed and used the land in the past. The often quoted phrase "the past is the key to the present" is a sound one in regards to this type of study. Chapter two studies the historical development of the township. Again, we try to select only the facts that will give us a better understanding of present conditions.

In chapter three we look at man and his agricultural endeavors. We see if and how he has adjusted to his environment. We look at the forces her has conquered and those with which he continues to struggle.

 Although Beverly Township is basically an agricultural area. we must not forget the urban function of the small centers nor should we ignore any industries that have helped to develop the township and that might complement the agricultural function of the community. Chapter four studies the non-agricultural activities.

Chapter five is the most important chapter in the study. It is in this chapter that all our findings and conclusion are gathered together and given meaning.

abstract: Thesis

abstract: Bachelor of Arts (BA)


abstract: Title: Sedimentology, Petrography, and Depositional Environment of Dore Sediments Above the Helen-Eleanor Iron Range, Wawa, Ontario, Author: Katheryn L. Neale, Location: Thode

abstract:
Archean sediments of the Dore group, located in the Wawa greenstone belt, were studied. The sediments are stratigraphically above the carbonate facies Helen-Eleanor section of the Michipicoten Iron Formation. A mafic volcanic unit, 90 m thick, lies between the iron range and the sediments.

 Four main facies have been identified in the first cycle of clastic sedimentation above the mafic flow rocks, a 170 m break in stratigraphy separates the volcanics from the first facies. The basal sedimentary facies in an unstratified and poorly sorted granule-cobble conglomerate, 200 m thick, interpreted as an alluvial mass flow deposit. Above the conglomerate, there is a 20 m break in the statigraphic column. The second facies, 220  m to 415 m thick, consists of laminated (0.1-2 cm) argilites and siltstones, together with massive, thick-bedded (8-10 cm) greywackes. The argillites and siltstones are interpreted as interchannel deposits on an upper submarine fan, and the greywackes are explained as in-channel turbidity current deposition. The third facies, 750 m to 1300 m thick, consists of normally graded greywackes (15-20 cm thick beds) interbedded with sharp based siltstones; respective interpretations are overbanked and in-channel deposition on the middle fan. Above the siltstones, there is a 100 m break in the stratigraphic sequence. The fourth facies is a subarkosic sandstone, 1400 m to 1625 m thick, which is characterized by alternating cycles of ripples, megaripples and parallel lamination--suggesting deposition by an ephermal or braided river. The sedimentary cycle is terminated by the intervention of the thick gabbroic sill.

The thick-bedded greywackes of the second facies contain significant amounts of authigenic talc, magnesite, ferroan dolimte and chlorite; they are not rich in detrital quartz (up to 33%) and feldspar (less than 1%). The scarcity of detrital minerals does not strictly comply with the definition of greywacke. However, based on the Mg-Fe character of the authigenic assemblage, the original or detrital minerals are thought to have been ferromegnesian.

abstract: Thesis

abstract: Bachelor of Science (BSc)


title: The Abundances and Geochemistry of Some Noble Metals in Thetford Mines Ophiolites, P. Q.

contributor:
Crocket, James H.
Geology

subject: abundances, geochemistry, noble metals, Thetford Mines, Ophiolites, rocks

abstract:
 Ophiolites are generally regarded as fragments of ancient oceanic crust and upper mantle emplaced on the continents. Thetford Mines ophiolites probably formed in a marginal or back-arc basin by three separate but related igneous events. The first event involved the partial melting of a rising mantle diapir. The melt produced later underwent extensive fractional crystallization involving olivine, spinel, pyroxene and plagioclase to form a layered sequence of dunitic, pyroxenitic and gabbroic cumulate rocks. The residual magma fraction after this extensive fractional crystallization was later erupted as part of hypabyssal rocks and MgO, Cr and Ni poor lavas. During the second and third stages, the residual mantle material from the first episode of melting was remelted to produce melts from which low TiO2 lavas were formed. The low TiO2 lavas are also depleted in other incompatible elements such as Zr and Y which presumably were lost into the magma produced by the first stage melting of the mantle. The mantle residue after the multi-stage melting of the mantle is believed to be represented by the harzburgite occurring at the base of the ophiolite suite.

 The cumulates display wide variability in their major and trace as well as noble metal contents principally in response to fractional crystallization while the harzburgite displays uniform chemistry, compatible with its origin as a residue of extensive partial melting of the mantle. However, on the average, Thetford Mines plutonic rocks have similar noble metal contents to Mt. Albert pluton, Gaspe, but have higher PGE than the Troodos ophiolites. Thetford Mines rocks are also depleted in the noble metals in comparison to the stratiform layered complexes such as Bushveld and Stillwater. The volcanic rocks can be classified into three groups on the basis of their noble metal contents viz., i) low Ir, low Pd lavas, ii) low Ir, high Pd and iii) high Ir, high Pd lavas. These groups correspond to the lavas produced during the first, second and third igneous events respectively. The noble metal contents of the first group are similar to
most ocean floor basalts while the third group lavas are comparable only to oceanic island and intraplate basalts.

 During fractional crystallization of the parental magma of the
cumulates, Ir was strongly partitioned into early formed rocks such as the olivine-chromite cumulates while Pt and Pd were progressively enriched in the residual magma fraction. Au, however, was less sensitive to fractional crystallization than the PGE.

 After the formation of the ophiolites, the lavas and hypabyssal rocks were metamorphosed to greenschist facies by hydrothermal sea water, and the ultramafic rocks were serpentinized, first in the oceanic environment by sea water and later on the continent by meteoric water, Most of the major and trace elements were mobilized during the hydrothermal alteration of the lavas but the PGE were immobile. It is suggested that the redox potential of the hydrothermal solution was not high enough to oxidize the noble metals and so permit mobilization. Au, however, shows some degree of mobilization, and it is believed that some Au occurred along grain boundaries and was carried as particulate material (mechanically) by hydrothermal solution. The noble metals were only slightly mobilized during the continental serpentinization episode. Their inertness during the oceanic serpentinization episode is attributed to the reducing condition of the oceanic environment which prevented formation of soluble noble metal complex ions.

 Unlike many ophiolite occurrences, Thetford Mines rocks appear to have very little economic potential with respect to base and noble metals, principally because of lack of abundant sulfides to act as concentrators of the metals.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: A Geographical Study of Keppel Township

contributor:
Reeds, L. G.
Geography

subject: geographical, Keppel Township, land

abstract: The two maps are located at the end of the thesis.

abstract: Abstract Not Provided.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Three-Phase Inverter Design Using Wide-Bandgap Semiconductors to Achieve High Power Density

contributor:
Emadi, Ali
Electrical and Computer Engineering

subject:
three-phase inverter
optimality
silicon carbide
wide-bandgap
power electronics
automotive

abstract:
Electric and more-electric vehicle proliferation continues unabated as government mandates worldwide demand fuel economies in excess of what conventional internal combustion engines are capable of. Vehicle electrification, to any degree, is perceived to be the means by which automotive companies may meet these targets. Electrification introduces a myriad of problems including cost, weight and reliability, all of which must be addressed in their own right. The rapid commercialisation of wide-bandgap semiconductor materials which, as a whole, exhibit properties superior to ubiquitous Silicon, provides the opportunity for power electronic converter minimisation and efficiency maximisation, easing the challenge of meeting current and incoming standards.

This thesis concerns itself with the design methodology of a highly power dense converter, as applied to a three-phase inverter. By using figures of merit, simple modelling techniques and novel discrete component selection tools, a converter is designed that is capable of switching 30kW of electric power at 100kHz in a small package. Testing results show that the converter, with a simple forced air heatsinking solution, can effectively switch 9kW of power and is capable of reaching 15kW. Given the temperature rise of one phase leg of the inverter relative to the others, a superior heatsink design would allow the inverter to reach its rated power levels.

abstract: Dissertation

abstract: Master of Applied Science (MASc)


abstract: Title: Petrology and Geochemistry of Felsic Volcaniclastic Rocks along the Sherman Mine Road, Temagami Greenstone Belt, Strathy Township, Ontario, Author: Timothy C. Schwartz, Location: Thode

abstract:
Felsic volcaniclastic rocks and intrusions along the Sherman Mine road, Temagami greenstone belt, were studied to determine if the petrological and chemical characteristics of these rocks indicate they are favourable hosts for volcanogenic massive sulphide deposits. Mapping of these felsic rocks was done at a scale of 1:5000 utilizing a 100 m spaced cut grid and pace and compass. Since outcrop is scarce and exposures are poor in this area, most correlation of the felsic horizons was done on the basis of trace and rare-earth element geochemistry.

On the basis of the chemistry of the rocks, three distinct felsic horizons were defined. The quartz feldspar porphyries are FI type cacl-alkaline felsic intrusives with [La/Yb]n ratio from 16 to 29 and no Eu anomaly. The Link Lake and Sherman Gate horizons are FII type calc-alkaline volcaniclastic horizon with [La/Yb]n ratio from 5 to 7 and weak negative to positive Eu anomalies. The Upper and Lower Felsic horizons are FIIIa type tholeiitic rhyolite lava flows and valcaniclastics. These horizons have [La/Yb]n ratios from 1 to 3 and strong negative Eu anomalies from 0.16 to 0.42.

Petrology and net transfer of material calculations indicate the Upper and Lower Felsic Horizons have been silicified, resulting in a net addition of Si and Al to these rocks. There is no distinct pattern of chemical changes which would indicate proximity to a single volcanogenic massive sulphide alteration pipe, however, an enrichment of the light rare-earth elements in the eastern section of the thesis area suggests this area maybe more
proximal to an alteration pipe, and thus a vent. Lithological characteristics of the eastern section of the thesis area also suggests it is more proximal to a vent than the western section.

Pyrite clasts are present in several of the volcaniclastic units. While the presence of sulphide rich clasts can be an indicator of proximity to a volcanogenic massive sulphide deposit, the textural and chemical characteristics of these clasts indicate they originated from shale horizons in this area. For this reason, these clasts should not be used as an indicator of proximity to a volcanogenic massive sulphide deposit.

Trace and rare-earth element classifications indicate both the Link Lake and Sherman Gate horizons, and Upper and Lower Felsic horizons are favourable host rocks for volcanogenic massive sulphide style mineralization while the quartz feldspar porphyries, such as the Milne vent and the City Dump vent, are not. Although the felsic volcanic packages are relatively thin, potential exploration targets would be the upper contact of the Upper Felsic horizon and the Link Lake and Sherman Gate horizons./

abstract: Thesis

abstract: Master of Science (MS)


title: IDENTIFY AND MODEL FIREFIGHTER LOWER EXTREMITY POSTURES

contributor:
MacDermid, Joy C
Rehabilitation Science

subject: posture analysis Dartfish

abstract:
Firefighting is associated with high rates of musculoskeletal (MSK) injury. Overexertion is the most common source of MSK injury among firefighters. Evaluation of how tasks are performed can identify injury risks. Use of video-based software can help quantify firefighter tasks, but requires accuracy despite complex movement and equipment/clothing interfering with line of sight. Therefore, the purpose of this study was to describe hip and knee joint motion performance while lifting a high-rise pack (HRP) from floor to shoulder and to determine the relationship between hip joint displacement and isolated hip and knee joint angles.
All the tasks were captured and measured as part of a larger FIREWELL study involving a total of 48 active firefighters. The kinematic information was extracted with the Dartfish© program using angle tracking and positional coordinates methods.
The results of the current study indicate that lifting a high-rise pack involves a knee arc of motion of 84 ⁰ (SD = 29⁰) for the left side and 96 ⁰ (SD = 33⁰) for the right side. Displacement of the hip joint may be useful to estimate knee motion where angle measurements cannot be reliably obtained. The need to normalize displacement by height remains unclear.
Future studies on video capture methods should focus on the a) reliability, b), ability to potential measure for change, c) predictive value of different movement indicators in task retraining videos.

abstract: Thesis

abstract: Master of Science (MSc)


title: The Lattice of Equational Classes of Commutative Semigroups

contributor:
Bruns, G.
Mathematics

subject: lattice, equational, classes, commutative semigroups

abstract: Commutative semigroup equations are described, and rules of inference for them are given. Then a skeleton sublattice of the lattice of equational classes of commutative semigroups is described, and a partial description is given of the way in which the rest of the lattice hangs on the skeleton.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: The Influence of Temperature and Precipitation on Picea Mariana at Treeline

contributor:
MacDonald, Glen
Geography

subject: influence, temperature, precipitation, Picea Mariana, Treeline, climate

abstract: Statistical analyses between the relationship of tree-ring widths with variations in climate were used to examine the limiting climatic factors upon the growth rate of Picea mariana along the treeline and in hopes of reconstructing past climate. Tree-ring widths were used as a proxy measure of growth rates to establish the relationship of annual variances in temperature and precipitation on the growth rate of trees. Twelve tree cores were sampled from separate trees along the treeline northeast of Yellowknife, Northwest Territories. The trees, (with cores spanning 40 -160 years per tree), were compared to monthly and seasonal variations of both temperature and precipitations. A stepwise regression model was used to examine the climate-growth response. No climatic variables were found to illicit a general response pattern. The growth rate of trees along the treeline, northeast of Yellowknife do not appear to be dependent upon variations in the regional climate. Therefore, no climatic reconstructions were possible.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Incoming Radiation and Vertical Temperature Profiles in a Polluted Urban Atmosphere

contributor:
Rouse, W. R.
Geography

subject: radiation, vertical temperature, polluted, urban, atmosphere

abstract:
 Simultaneous measurements of incoming short and longwave radiation were made at a rooftop site in the industrial heart of Hamilton, Ontario, and at a control station several miles to the south of the city at Mt. Hope airport. Direct comparison of these measurements was facilitated by selecting clear sky days from the winter solstice to the end of April.

 Results indicate that the decrease in solar radiation intensity due to atmospheric pollution is balanced by a comparable increase in the flux of incoming longwave radiation from the sky. Receipts of total incoming radiation are therefore the same at both sites.

 Vertical air temperature profiles over the industrial site and the control site were measured using a specially designed aircraft-mounted sensor. Profiles were determined on the same days that radiation measurements were made.

 While the temperature profiles at the control site occasionally exhibited a slight subsidence inversion, the industrial profiles consistently showed a marked inversion whose magnitude diminished with increasing solar altitude and increased again toward sunset. This behaviour is attributed to the enhanced shortwave absorptivity and longwave emissivity properties of the polluted atmosphere.

 The height of the inversion increased during the morning hours and fell again during the afternoon in response to atmospheric convection caused by surface and atmospheric heating during the day. The top of the inversion, however, always coincided exactly with the top of the visible pollution dome.

abstract: Thesis

abstract: Master of Science (MSc)


title: Evolution of Inter-Regional Migration Patterns in Canada; 1951-1986

contributor: Papageorgiou Anderson Geography

subject: evolution, inter-regional, migration, patterns, Canada

abstract:
Abstract Not Provided.
Thesis
Candidate in Philosophy


title: Fine Structure in Thermal Neutron (n,α) Reactions

contributor:
Macfarlane, R. D.
Physics

subject: fine structure, thermal, neutron, reactions, electrostatic, alpha decay

abstract: Fine structure in thermal neutron (n, α) reactions has been studied for 149Sm, 147Sm, and 143Nd by means of an instrument called an electrostatic particle guide. This device, which was designed to eliminate the problems of background and low energy tailing in (n,α) spectroscopy, is described in detail. Alpha decay has been observed from thermal neutron capture states to levels in the daughter nucleus to greater than 2 MeV excitation. Cross sections and alpha energies are presented for each transition and as well, the alpha decay schemes for 146Nd, 144Nd, 140Ce. Experimental reduced widths have been calculated and are discussed in terms of Mang's theory of alpha decay. Evidence is presented for the (n, γα) process in the 143Nd (n,α) 140Ce reaction.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


contributor:
McCann, S.B.
Geography

abstract: Title: The Determination of a Set of Terrain Units fro Durham County, Ontario, Using Aerial Photographs, Author: Jane Law, Location: Thode

abstract: This study attempts to evolve a methodology for defining terrain types from vertical aerial photographs; to determine the extent to which aerial photographs can serve as a basis for terrain unit mapping; to produce a classification of terrain types for the Durham County and by so doing to provide a small contribution towards the knowledge about the study area.

abstract: Thesis

abstract: Master of Science (MS)


contributor:
Carter, G.
Thampson, D.A.
Engineering Physics

abstract: Title: Ion-Beam Induced Mixing Processes and Gas Sputtering, Author: Richard G. Newcombe, Location: Thode

abstract:
Section I of this report discusses ion-beam induced mixing processes in solid targets. It is shown theoretically that cascade mixing can be approximated as a diffusion process. Further calculations attempt to show that some of the phenomena of ion-plating can be explained by this mixing process. Experimental data was obtained on the mixing of
thin (~200 nm) layers of Ag into a Si substrate by bombardment
with 35keV Ar+ ions, at fluences up to 6 x 10^14 ions/mm2. The results were observed by 2.0 MeV He+ ion Rutherford backscattering.

In Section II, the release of trapped Kr from Ni is discussed. Kr, doped with radioactive 85Kr*, was implanted as 20keV ions, and subsequently released by post-bombardment with 5keV, 20keV and 80keV Kr+ ions. Three sets of Ni samples were Kr implanted to fluences of 5 x 10^12 ions/mm2, 5 x 10^13 ions/mm2 , or 5 x 10^14 ions/mm2 . The post-bombardment was carried out to fluences ranging from 5 x 10^12 ions/mm2 to 3.5 x 10^14 ions/mm2 . The relative quantities of trapped
Kr * were determined by counting radioactive decay events for a fixed time interval.

The results of this preliminary work show that many more experiments are required before these processes can be
well-understood.

abstract: Thesis

abstract: Master of Science (MS)


contributor:
Pengelly, L.D.
Bharghava, Liaw
Bharghava, Anami
Taylor, S.M.
Geography

abstract: Title: Spatial Variation in Respiratory Disease in Hamilton, Ontario, Author: Andrea Nordoff, Location: Thode

abstract:
The main objective of this study is to examine the effects of the outdoor environment as well as confounding indoor environmental factors upon school-age children in Hamilton, Ontario. This research paper allows for the spatial variation of respiratory disease to be outlined according to
five regions of Hamilton: West Mountain, East Mountain, West Lower, East Lower, and North Barton. Due to the high concentration of pollution in the East Lower region, the area north of Barton Street was considered a region in itself. Information was obtained from a study conducted by Dr. L. D. Pengelly of the Urban Air Environment Group and Department of Medicine of McMaster University in 1982. The sample used in the study consisted of 3500 school-age children in conjunction with the Hamilton Board of
Education. The data was collected in two ways: a questionnaire conducted by a trained interviewer which took place in the individual household, regarding the child's health history, their home and family as well as pulmonary testing within the schools. Sample characteristics were
compiled to evaluate response variations between regions. The results show that as the outdoor environment worsens or approaches the industrial core, several respiratory symptoms increase in occurrence indicating the impact of external pollution on respiratory health. The key indoor factor of parental smoking tends to have the most effect on respiratory symptoms, especially wheeziness for all five regions of Hamilton with gas stove use and forced air heating showing little if any significance.

abstract: Thesis

abstract: Bachelor of Arts (BA)


contributor: Reader Geography

abstract: Title: An Investigation of Consumer Loyalty to Stores, Author: Gordon W.F. Parsons, Location: Thode

abstract:
In recent years there has been growing commercial and academic interest into the question of consumer purchasing behaviour at stores, and a great deal of research has been done on this topic using aggregate consumer data. The main study objective of this investigation was to ascertain the nature of consumer store loyalty across different product
fields, consumer characteristics, and shopping trip characteristics, based on an analysis of consumer purchasing sequences carried out by the 'run test'. The analysis of data extracted from the Cardiff Consumer Panel, a data set which includes continuous records of the grocery shopping
behaviour using the this approach revealed a number observations on the nature of consumer purchasing behaviour, including a link between car ownership and store loyalty.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Crystallographic Study of Alkali Metal Dichromates

contributor:
Brown, I. D.
Physics

subject: crystallographic, study, Alkali metal, dichromates, polymorphs, structures, anions

abstract:
 The alkali metal dichromates show extensive polymorphism. The crystal structures of the polymorphs α-Na2Cr2O7, β-Na2Cr2O7, β1-Rb2Cr2O7 and P21/c NaRbCr2O7 have been determined with x-ray methods. Crystal data were determined for β2-Rb2Cr2O7, P1 Cs2Cr2O7 and the P21/c NaCsCr2O7.

 The dichromate ions found in this work have been compared with the dichromate ions found in other crystal structure determinations. The anions are described in terms of the bridging oxygen angles b and the torsion angles α1 and
α2. Many of the dichromate ions are close to having C2v symmetry with values for α1 and α2 close to zero and bridging angles of around 124°. But there is a number of dichromates with α1 = -α2 and 0°<|α|<60° for which the bridging angle varies between 131° to 141°.

 The structures determined in this work are discussed as part of a unified description of thortveitite like and dichromate like structures in terms of layers of Y2O7 anions. In terms of
this description and Brown and Calvo's classification a structure is proposed for the β2Rb2Cr2O7, while for the structure of NaCsCr2O7 it is suggested that it is isostructural to that of P21/c NaRbCr2O7. The phase transition of α-Na2Cr2O7 to β-Na2Cr2O7 is considered and it is suggested that a twisting thermal mode plays an important role in this as well as in other transitions.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


contributor:
Adronov, Alex
Chemistry

abstract: Title: Dendrimers for Cancer Therapy and Diagnostic Imaging, Author: Matthew C. Parrott, Location: Thode

abstract:
The enhanced permeation and retention (EPR) effect is a phenomenon that allows macromolecular (or polymeric) structures to passively concentrate in tumour tissue. The large size and high molecular weight of macromolecular-drug conjugates increase their blood circulation time, which allows for significant accumulation in tumor tissue over an extended
period of time. Linking chemotherapeutic agents to the backbone of water-soluble polymers has resulted in a number of polymer therapeutics currently in clinical trials.

A growing number of researchers are utilizing the EPR effect to develop new macromolecular-drug conjugates for the treatment and/or diagnostic imaging of diseased tissue. We have added to this research by constructing three novel carborane containing
dendrimers for drug delivery. We were able to synthesize these materials using a bifunctional carborane synthon bearing a carboxylic acid and protected alcohol functionality. This bifunctional synthon could be integrated into an aliphatic polyester dendrimer using esterification conditions followed by further dendronization. This approach led to three water soluble dendrimers that contain 4, 8, and 16 hydrophobic carborane cages within their interior. The sensitive balance between the hydrophobic nature of the carborane cages and hydrophilic nature of the dendrimer scaffolds led to materials that had a lower critical solution temperature (LCST), a phenomenon where material precipitates from solution at
high temperatures. The final dendrimers had a high molecular weight, were water soluble, and had a large concentration of boron encapsulated within the dendritic interior. These characteristics are ideal for potential agents for Boron Neutron Capture Therapy (BNCT), a well known treatment for cancer and rheumatoid arthritis. However, the inability to track each dendrimer in vivo and determine its biodistribution was a major drawback.

To overcome this limitation we synthesized three additional dendrimers. These dendrimers were synthesized to a high molecular weight using a unique orthogonal protecting group strategy. Following the removal of a toluene sulfonyl ethanol protecting group located at the core of the dendrimer, we were able to introduce a metal chelating ligand using standard amidation chemistry. This ligand was comprised of a tri-nitrogen bis-pyridyl moiety known to chelate an atom of radioactive technetium-99m with high affinity. Technetium-99m
is the most widely used radionuclide in diagnostic nuclear medicine due to its ideal nuclear properties, low cost, widespread availability, and its ability to be tracked in vivo using Single Photon Emission Computed Tomography (SPECT). By placing the radioactive nuclide at the core of the dendrimer we were able to provide a unique environment that maintained overall
dendrimer solubility characteristics, provided protection from the external environment, and minimized the interaction between the metal/ligand complex and biological tissues. These were the first dendritic compounds to utilize the core functionality for radioactive labeling, and the first dendritic compounds to chelate radioactive technetium-99m. Real-time dynamic SPECT and three dimensional SPECT-CT were performed on all three radioactive dendrimers, and an in depth biodistribution study was performed on the largest macromolecule.

This work opens the possibility for combining carborane-containing dendrimers with
the 99mTc-label, allowing the potential development of a dendrimer that can 1) passively target diseased tissue via the EPR effect, 2) be tracked and imaged in vivo by SPECT, and finally 3) be used to treat diseased tissue by way of BNCT.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: The Ion Binding Properties of Cytochrome C and A Study of a Possible Involvement of Lysine Residues

contributor:
Morton, R. A.
Biochemistry

subject: ion binding, properties, cytochrome, lysine residues, ionic strength, oxidation reduction

abstract:
 This thesis describes the ionic strength and ion binding effects on the oxidation reduction properties of cytochrome c and its lysine modified derivatives.

 Cytochrome c has been modified in two different ways: a complete modification of all lysine residues and specific modification of one lysine residue. Some properties of the modified derivatives are described.

 Ion binding properties of cytochrome c and its lysine modified derivatives were studied by measuring the apparent equilibrium constant of the reaction between the
ferri- form of the protein and potassium ferrocyanide. It was found that unmodified cytochrome c binds one cation (K+, Na+) per molecule, and binding is much stronger to the reduced form of the protein. Binding of cations is not changed upon modification of the lysine residues. For binding of the chloride, there are two binding sites on the cytochrome c molecule, and the binding is much stronger to the oxidized form of the protein. It was shown that upon the modification of the lysine residues in either way the binding of chloride was considerably changed. It was concluded that one of these two binding sites for chloride on cytochrome c involves lysine residue, probably the residue number 13.

abstract: Thesis

abstract: Master of Science (MSc)


contributor:
Thompson, D.A.
Carter, G.
Engineering Physics

abstract: Title: Some Ion-Bombardment Effects on Copper-Gold Alloys, Author: Richard G. Newcombe, Location: Thode

abstract: This report discusses some of the effects of medium-energy ion-bombardment on various copper-gold alloys. Thin (20nm-150nm) films of copper-gold alloys, on Si or SiO2 substrates, were bombarded with 30keV Ar+, 45keV Ar+, or 45 keV Bi+ ions, to fluences of up to 8 x 10^14 ions/mm2. One of the targets was held at ~50°K; the others were irradiated at room temperature. The effects were observed by 1.00 and 2.00 MeV He+ ion Rutherford backscattering. The results are discussed in terms of preferential sputtering, gas trapping, and surface topography.

abstract: Thesis

abstract: Master of Engineering (ME)


contributor:
Baird, M.H.I.
Chemical Engineering

abstract: Title: Transitional Phenomena in Oscillating Liquid Columns, Author: Julian R.S. Park, Location: Thode

abstract:
The damping of free oscillations in liquid-filled U-tube manometers was investigated. The laminar damping coefficients determined were in good agreement with those obtained in previous studies; allowances were made for the secondary flow patterns existing. Two Reynolds numbers were used to characterize the onset of turbulence for both fully-developed
and boundary layer type velocity profiles occurring in the system. There is evidence that transition in oscillating liquid columns is influenced by the internal tube surface, and the transition height may well be dependent on the damping exponent for the turbulent flow prior to transition.

abstract: Thesis

abstract: Master of Engineering (ME)


title: Two-Neutron Stripping Reactions Leading to the 153Sm, 178Yb, and 180Hf Nuclei

contributor:
Burke, D. G.
Physics

subject: two-neutron, stripping reactions, nuclei, angular, distributions

abstract:
 The (t,p) reaction has been performed on targets of 151Sm, 176Yb and 178Hf. The experiment was performed with 15 MeV tritons. The outgoing protons were analyzed with the Enge split-pole spectrograph. Angular distributions were measured for all three nuclei with special emphasis being placed on L=0 transitions.

 The angular distributions for the 151Sm(t,p)153Sm reaction showed that the distribution of L=0 strength among the low-lying states is not consistent with expectations based on the detailed wavefunctions for 151Sm and 153Sm calculated by two independent groups; Katajanheimo and Hammaren (1978) and
Rekstad et al. (1978). The distributions also showed that the total L=0 strength, summed over the four observed states in 153Sm, is much less than for neighbouring nuclei.

 Angular distributions of the (t,p) reaction on 176Yb and 178Hf targets showed strong L=0 transitions to levels at ~ 1.3 MeV excitation. It is believed that the N=108 energy gap in the Nilsson diagram is the cause of the large L=0 strength observed. At present no quanitative calculation has reproduced the observed phenomenon, however a calculation based on the Volkov model is presently being considered.

abstract: Thesis

abstract: Master of Science (MSc)


title: Optical Time domain Reflectometry

contributor:
Godfrey, L.A.
Engineering Physics

abstract: Title: Optical Time domain Reflectometry, Author: Randall E. Park, Location: Thode

abstract:
This report is a theoretical and experimental study of optical time domain reflectometry techniques as applied to fiber optic systems. It predicts system performance for measurements of fiber breaks and
discontinuities, fiber attenuation, and fiber dispersion. Two systems are shown to be needed for the two common types of future fiber systems.
For single mode fibers at 1300 nm, an ultra short (<100 psec) light
pulse is needed for a system which could check for breaks and measure
dispersion. For graded index fibers at 900 nm, a sensitive system using
a 1 nsec pulse and amplifiers could be built to measure fiber attenuation properties using Rayleigh backscattering as well as for break detection and dispersion measurements. An ultra fast light source was constructed and used in an experimental optical time domain reflectometer system which is described. Recommendation as to components to use in the system are given.

abstract: Thesis

abstract: Master of Engineering (ME)


contributor:
Banaschewski, B.
Mathematics

abstract: Title: Quotient-Like Extension of Rings of Functions, Author: Young L .Park, Location: Thode

abstract:
In this thesis we study the quotient-like extensions of the rings of all real continuous functions on a topological space previously considered by Fine-Gillman-Lambek and certain generalizations of these. In particular we obtain a result on the absence of real maximal ideals in certain such rings; a connection between the maximal ideal spaces or such rings and projective covers of compact Hausdorff spaces; and a useful description of the relationship between the quotient-like extensions of rings of real
functions and their complex counterpart.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Attitudinal and Conflict Perspectives on Environmental Issues

contributor:
Taylor, S. M.
Geography

subject: attitudinal, conflict, perspectives, environmental issues, quality

abstract:
 Environmental quality has become an important political and social issue in recent years. This paper focuses on community attitudes toward the natural environment and their role in engendering conflict over such issues. It is argued that environmental conflict originates from variations in environmental attitudes and philosophies. A conceptual model of environmental
conflict is developed. The model includes five fundamental elements. These are: (i) community evaluations of environmentally disruptive actions, (ii) individual and group strategies adopted in light of these evaluations, (iii) reactions of official agencies (public or private) to community involvement, (iv) resultant outcomes and (v) the effect of these outcomes on subsequent issues. As an empirical example of environmental conflict, the proposal to build an expressway through the Red Hill Creek Valley is used to assess the validity of the model. The findings indicate that attitudinal and conflict perspectives have much to offer concerning the analysis of environmental issues.

abstract: Thesis

abstract: Master of Arts (MA)


title: Effects of the Hamilton Street Railway Strike of 1982 on Downtown Businesses

contributor:
Hall, F. L.
Geography

subject: Hamilton Street Railway, downtown, businesses, transit strikes, revenues

abstract:
 This study investigates the effects of transit strikes on the central business districts (C.B.D. 's) of large cities. It focuses directly on the Hamilton Street Railway (H.S.R.) strike which occurred during the summer of 1982, and attempts to outline exactly what age-groups
were affected the most and whether or not the merchants of the downtown were significantly affected monetarily. Information was acquired from merchants through the circulation of a questionnaire which was distributed in September and October of 1983. A regression equation was formulated which took into account some possible causes for diminishing revenues other than the transit strike. The findings of this analysis were that the transit strike had a significant effect on the revenues of downtown businesses, as well as on the age-groups that were present in the downtown at the time of the strike. The regression analysis found that the other factors which were considered did not account for a very significant proportion of decreased revenues when compared to transit strikes.

abstract: Thesis

abstract: Candidate in Philosophy


contributor:
MacLean, David B.
Chemistry

abstract: Title: The Role of 2-Piperidneacetic Acid in the Biosythesis of Lycopodine, Author: Thi T. Nguyen, Location: Thode

abstract:
The role of 2-piperidineacetic acid in the biosynthesis of lycopodine was tested by feeding experiments with β-14C-2-piperidineacetic acid hydrochloride. The compound was synthesized starting from
2-picolylchloride which was treated with K14CN yielding the labeled
2-pyridineacetonitrile. Conversion of the nitrile to the ester was followed by reduction of the pyridine ring and hydrolysis of the ester function. The labeled β-14C-2-piperidineacetic acid was obtained in 60% radiochemical yield. When administered to L. tristachyum, alone or along with radioactive lysine, β-14C-2-piperidineacetic acid showed very low
incorporation into lycopodine. The incorporation of lysine into lycopodine
showed however that the alkaloid was being synthesized in the plant in the course of the feeding experiments. These results cast doubt on the hypothesis that 2-piperidineacetlc acid is an intermediate on the pathway to lycopodine from lysine.

abstract: Thesis

abstract: Master of Science (MS)


title: The Calculation of Solar Radiation over Lake Ontario

contributor:
Davies, J. A.
Physics

subject: calculation, solar radiation, Lake Ontario, meteorological

abstract: Simultaneous solar radiation and meteorological observations were taken from an instrumented tower located in southwestern Lake Ontario. During the four month period of this study (July-November, 1969) it was found that short-term fluxes of incoming global radiation could be predicted with a standard error which was better than 0.05 cal cm^-2min^-1 under cloudless conditions. Under cloudy conditions the lowest standard of prediction error (0.14 cal cm^-2min^-1) was obtained using a model which takes into account cloud type transmission. Under cloudless conditions the Fresnel curve underpredicts the albedos observed for low zenith angles and overpredicts when the zenith angle is high. This is mostly due to a backscatter effect estimated to be between 1.5 to 2% and to the albedo of diffuse radiation which was confirmed to be 6.5 to 7%.

abstract: Thesis

abstract: Master of Science (MSc)


contributor:
Prevec, L.
Biology

abstract: Title: Replication of Vesicular Stomatitis Virus in L Cells, Author: Martin Petric, Location: Thode

abstract: A heat resistant strain (HR-LT) of the Indiana serotype of vesicular stomatitis virus was characterized. Virus specific RNA and protein components of the cytoplasmic extract of cells infected with this strain of virus in the presence and absence of interference, were examined.

abstract: Thesis

abstract: Master of Science (MS)


title: Mode Choice for the Urban Work Trip

contributor:
Taylor, S.M.
Geography

abstract: Title: Mode Choice for the Urban Work Trip, Author: Luciano P. Piccioni, Location: Thode

abstract:
This research paper investigates the factors which influence mode choice (choice of car or bus) for the urban journey to work. A main objective of the study is to determine the validity of the attitudinal approach to explaining mode choice which explains mode choice by using
the traveller's subjective impressions of the attributes of different modes. The second objective is to study the mode choice decision-making process and its relationship to actual mode choice, socioeconomic, demographic, and transportation characteristics.

Information was obtained from a sample of McMaster University employees using a questionnaire which was distributed in November of 1986. Respondents were asked to
indicate their degree of preference for car or bus in response to hypothetical mode choice situations. The utility of this controlled simulation approach was also evaluated.

The results provide support for the attitudinal modelling of mode choice and for the general paradigm which seeks to explain human travel behaviour through the use of controlled simulation. The results provide information regarding the relative weighting of travel time and travel cost in the mode choice decision process. Also, hypothetical mode choice preference was shown to be related to actual mode choice but not to socioeconomic, demographic
or transportation characteristics.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: The Decomposition of Butyl Acetates over Charcoal Catalyst

contributor:
Anderson, R. B.
Chemical Engineering

subject: decomposition, Butyl, acetates, charcoal catalyst, reactor, gas-phase, kinetic

abstract: This thesis presents an experimental study of the decomposition of the four isomers of butyl acetate over charcoal catalyst in a fixed bed reactor. The research attempts to determine the kinetics and mechanism of butyl acetate decomposition over a high surface area, non-selective catalyst, and to compare the catalyzed reactions of butyl acetates with their gas-phase reactions. When interpreting the experimental kinetic data it is hypothesized that each of the butyl acetates follows the same mechanism when reacting on charcoal. The best theoretical equation for expressing the rate of butyl acetate reaction was selected from the Langmuir-Hinshelwood equations.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


abstract: Title: Refractor Plates Optimization and Data Analysis of a Correlation Spectrometer, Used as a Remote Sensing Instrument, Author: William W.M. Ng, Location: Thode

abstract:
The work described in this report was conducted at Atmospheric Enviroment Service of Canada from May 28th to September 28th, 1973 under a cooperative arrangement between Atmospheric Environment Service of Canada and McMaster University, Hamilton. The aim was to provide an M. Eng. student from McMaster with an opportunity to
gain experience in an industrial environment while fulfilling a need generated by industry. This report was part of a project on a modified correlation spectrometer, developed to be used as a point sample.

abstract: Thesis

abstract: Master of Engineering (ME)


title: Investigation of Cavity Wall Ties

contributor:
Drysdale, Robert G.
Civil Engineering

subject: cavity, wall ties, metal, specimens

abstract:
 This report contains the results of an exploratory investigation into the strength (compressive and tensile) of the most commonly used cavity wall ties. Z, Truss, Ladder and Corrugated metal ties were tested in the Applied Dynamics Laboratory at McMaster University.

 A total of 110 specimens were constructed and tested. Fifty-five specimens were tested in compression, another 55 specimens were tested in tension. The influence of different cavity widths and lengths of mortar imbedment on the strengths of the ties were also
investigated.

 The ultimate load capacity, for each tie investigated, was related to loading on a unit of wall area by taking into consideration the recommended spacings for each tie.

 A strength comparison of the ties tested was made. Finally, conclusions were drawn and recommendations made.

abstract: Thesis

abstract: Master of Engineering (MEngr)


contributor:
Horsley, R.J.
Mak, S.
Biology

abstract: Title: The Ultraviolet Radiosensitivity of Oedogonium cardiacum Cells at Various Stages of the Cell Cycle, Author: Kirsten E. Parker, Location: Thode

abstract:
The ultraviolet radiosensitivity of synchronously growing O. cardiacum, was measured during the first generation cycle and compared to the radio sensitivity to ionizing radiation. Both radiosensitivity patterns were approximately the same in shape exhibiting a maximum resistance in S and a minimum in G2. Following x-radiation Do and n values varied with age by a factor of 7 and 40 respectively. In contrast following UV radiation Do varied by a factor of 2.5 and n remained essentially constant. A
seasonal variation in the magnitude of the UV radiosensitivity was observed and is attributed to seasonal differences in UV cytoplasmic absorption . A complex survival curve was obtained at all cell ages and dose levels. An explanation for the shape of the complex curve involving
cytoplasmic UV attenuation and the additive effects of UV-induced
cytoplasmic damages at high dose levels is favoured. Preliminary investigations showed that photoreactivation does occur.

abstract: Thesis

abstract: Master of Science (MS)


title: Nuclear Moments of 140La, 147Nd, and 149Nd

contributor:
Summers-Gill, R. G.
Physics

subject: nuclear moments, atomic beam, magnetic, resonance, polarization

abstract:
 Using atomic beam magnetic resonance techniques the hyperfine structure (hfs) constants for the magnetic dipole and electric quadrupole interaction, AJ and BJ, have been measured for the following isotopes: 40-hour 140La, 1.8-hour 149Nd and 11-day 147Nd.

 For 140La the hfs constants are (relative to the J = 5/2 state of 2D) |A5/2| = 55.9(4) MHz, |B5/2| = 38(4) MHz, B5/2/A5/2 > 0. Application of the Fermi-Segre relations in
comparison with 139La yields the nuclear moments; μI = (+)0.73(3) n.m., and Q =(+)0.11(4) b. The adopted signs are based on Blok's measured sign of Q for 140La.

 For 149Nd the hfs constants are: |A4| = 91.0(19) MHz, |B4| = 266(53) MHz, and B4/A4 > 0. Comparison with 145Nd yields μI = (-)0.350(10) nm., and Q = +1.3(3)b. The signs of these moments are based on Q>0 as indicated by nuclear systematics in this region.

 For 147Nd the hfs constants are |A4| = 143(4) MHz, |B4| = 181(64) MHz, and B4/A4 > 0. Comparison with 145Nd yields |μI| = 0.553(15) n.m., |Q| = 0.9(3) b and μI/Q <0.

 The error in the 140La magnetic moment allows for a possible 2% hfs anomaly. The quadrupole moments allow for a possible 25% error in the core polarization correction
(Sternheimer).

 These results are discussed in terms of the shell model, the quasi-particle model, and the Nilsson model.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: On the Motion of a Naturally Curved and Twisted Slender Rod

subject: motion, naturally curved and twisted, slender rod, frequencies, helical spring

abstract:
A set of equations describing the motion of a naturally curved and twisted slender elastic rod is determined in this thesis. In particular, a study of the vibration of a helical spring is made, and the natural frequencies from the theory presented are compared with those from a simpler theory. Comparison of the two theories shows that the simpler theory is valid for most
springs. The simpler theory is then used to show how the natural frequencies for a helical spring can be obtained when the spring is subjected to any boundary conditions. Finally, an analytical and experimental study of the vibration of a helical spring clamped at both ends is
made in order to investigate the validity of the theory presented.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Evaluation of the Performance of the Gamma Densitometers of Atomic Energy of Canada Limited (Part A)

contributor:
Stern, F.
Engineering Physics

subject: gamma densitometers, Atomic Energy, Canada Limited, performance, temperature, drift

abstract:
 The Three Beam Gamma Densitometers developed by AECL-WNRE for measurement of void fraction in flowing steam/water mixtures were investigated to determine the major causes of drift and slow response to changes in void fraction. Available remedies were evaluated. The study indicated the following: (1) Using the existing current mode system, considerable reductions in drift and response time may be possible through the following
inexpensive modifications: (a) design changes in the photo multiplier tube high voltage
circuit,
(b) replacement of the detectors with Cadmium Telluride semi-conductor detectors,
(c) replacement of the scintillation phosphor with one which exhibits no afterglow such as Bismuth Germanate or Cesium Fluoride,
(d) matching voltages of photo multiplier tube outside wall and photocathode,
(e) improved stabilization of high voltage and detector temperature. (2) Drift would probably be reduced to less than 0.1%/hour if the existing current mode system were replaced with a simple integral counting mode system at an approximate cost of $5,200 per densitometer. (3) Additions to the above counting mode system of a single channel analyser (S.C.A.) and an automatic gain control unit which uses a reference light would probably completely eliminate drift as well as substantially improve system response. This would require an additional $4,900 per densitometer.

 It is recommended that these modifications be implemented in the same order as above, on a trial basis, as far as further expenditure is justified.

abstract: Thesis

abstract: Master of Engineering (MEngr)


title: Ion Implanted Solar Cells

contributor:
Schewchun, J.
Physics

abstract: Title: Ion Implanted Solar Cells, Author: J. Bruce Neilson, Location: Thode

abstract:
A topic of much interest recently is energy production, and one means of production with much to recommend it is the solar cell, a device which converts sunlight directly into electrical energy. In addition to the possible use as a general energy source, solar cells have current uses, including power generation for space stations and satellites, and the powering of remote installations such as weather stations where other power sources are not feasible.

The solar cell is, in essence, a semiconductor p-n junction with a contact grid on the surface and a low resistance contact
covering the bottom. Incident light generates electron-hole pairs, some of which diffuse across the junction and generate a voltage across it, and thus a voltage between the top and bottom contacts. The most efficient solar cells currently available (10% to 20% conversion) are single crystal silicon cells, and it is with these cells that this project is concerned.

A number of different fabrication methods are currently used in the production of single crystal silicon solar cells, including gas and spin-on diffusion techniques, MOS structures and thin film heterojunctions. The purpose of this project is to investigate the feasibility of the use of ion implantation as a fabrication method, and to study the effect of implant parameters on solar cell efficiency with a view to optimization.

Much work has been done on the use of implantation doping in the
fabrication of devices and integrated circuits. However, little has been
done to investigate its potential in the fabrication of solar cells(1,2).
Several advantages of the use of ion implantation are apparent. There is
greater control of the dopant distribution than with conventional diffusion
techniques. In particular, very shallow junctions are possible , allowing
the formation of the "blue-shifted" cell(3), which shows an enhanced
response to the short wavelength end of the spectrum. This should result
in increased efficiency for terrestrial applications, but of more importance
for space applications. Also, the geometry control available with the implantation technique facilitates the fabrication of grating cells(4),
which also have an enhanced blue response and correspondingly increased
terrestrial efficiency possibilities.

In the first part of this project, p-type silicon substrates were implanted with arsenic and phosphorous at energies from 20 keV to 120 keV, at implant temperatures from 40°K to 300°K. The samples were vacuum annealed, aluminum contacts were made, and the solar cell efficiencies were measured under a solar simulator.

For the second part of the project, the most significant implants were duplicated in samples in which the carrier concentrations and Hall mobilities at room temperature were measured using the Hall effect.

abstract: Thesis

abstract: Master of Science (MS)


abstract: Title: Housing Preferences of the Elderly in Midland, Ontario, Author: Patty Pantos, Location: Thode

abstract:
As Canada's population ages, researchers have been increasingly concerned with issues related to housing the elderly. This paper addresses the question of " housing preferences of the elderly" in Midland, Ontario and investigates reasons for these preferences.

The results of this research indicate that the elderly preferred accommodations that offered them independence, privacy, and access to health care.

Through cross tabulations , and chi-square analysis the independent variables that influenced the elderly's housing preferences were identified. These variables were present dwelling, marital status, income, age, and use of limited services.

These findings provide us with a better
understanding of the elderly's housing needs and preferences and will enable us to better facilitate the elderly's housing needs.

abstract: Thesis

abstract: Bachelor of Arts (BA)


contributor:
Mohanty, S.G.
Mathematics

abstract: Title: Joint Distributions of Several Non-Parametric Statistics and Tests Based on Them, Author: C. I. Petros, Location: Thode

abstract:
This thesis deals with joint distributions of several non-parametric
statistics, and considers certain tests based on them. It also discusses the question of determining significance probability bounds for any observation on the basis of the joint distribution.

abstract: Thesis

abstract: Master of Science (MS)


title: Nuclear Structure of 21Ne and 29Si

contributor:
Kuehner, John A.
Physics

subject: nuclear, structure, properties, angular distribution, linear polarization, nuclei

abstract: The properties of the levels of 21Ne and 29Si have been studied via γ-ray angular distribution and linear polarization measurements and γ-γ coincidence studies yielding a number of new spin-parity assignments to the states of both nuclei. Comparison of the results with the Nilsson model for odd nuclei indicate that for 21Ne, good agreement is in general obtained. Nevertheless, a number of interesting discrepancies exist with regard to the negative parity states of 21Ne and explanations have been proposed for some of these. The agreement is also quite good for 29Si with a calculation using a minimum of free parameters, confirming the oblate shape for this nucleus.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


abstract: Title: Children's Play Behaviour in the Urban Environment, Author: Ellen J. Nightingale, Location: Thode

abstract: This thesis studies the play behaviour of children, examining specifically their choice of environments, reasons for the selection, activities in each place, and territorial range. Using a questionnaire, data were collected from children in Grade Five or Six in two public schools in Burlington, Ontario. The results of the study show that children play in a wide range of environments - parks, planned indoor recreation centres, schoolgrounds, home areas, streets, institutions, general open space areas, and commercial places. Seven types of reasons were mentioned, including design, function, and locational characteristics of play places. Activities mentioned included both active and passive types, and solitary and group play. Hypotheses relating play behaviour to the personal characteristics of the children were tested. Several significant relationships emerged, with sex and housing type being the most useful independent variables. Other variables considered were length of residence, number of siblings, amount of play with parents, mobility, extra-curricular lessons, occupational aspiration, and amount of television-viewing. Implications of the results for the planning of play environments are discussed in the concluding chapter.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Vegetational Development on Young Raised Beaches in Northwestern Ontario

contributor:
Kershaw, K. A.
Biology

subject: vegetational, development, young raised beaches, lichen-heath, soil organic matter, environmental factors

abstract: The vegetational colonization and development preceding the establishment of lichen-heath was examined on a Hudson Bay coastal raised-beach system. A continuous and directional developmental sequence of approximately 200 years was quantified on both a coastal intraridge sample sequence and on an inland interridge sample sequence. Increasing gradients of elevation, soil peat thickness and soil organic matter coincide with the vegetational development, however no appreciable changes in soil pH or concentrations of available nutrients were detected and it is concluded that these parameters have little influence on the development of lichen-heath at this site. Community composition over the ridge profile forms a second major vegetational gradient which appears to be affected primarily by environmental factors related to ridge morphology and orientation. The interactions of environmental factors in the development of lichen-heath are discussed.

abstract: Thesis

abstract: Master of Science (MSc)


contributor:
Smeltzer, W.W.
Metallurgy

abstract: Title: The Role of Structural Defects in the Growth of Thin Nickel Oxide Films, Author: John M. Perrow, Location: Thode

abstract:
In this these, the nature and distribution of the structural defects present in thin nickel oxide films formed at 500° and 600°C have been determined, as a function of oxidation time, by means of transmission electron microscopy. For nickel oxide films of thickness up to at least 3500 and 5000Å, formed at 500° and 600°C respectively, the films were relatively uniform in thickness on individual metal grains and were composed of small oxide crystallites. The increase in crystallite size with oxidation time has been related to recrystalization and grain growth processes occurring in the films. An oxide film model has been advanced correlating the oxidation kinetics and simultaneous lattice diffusion and short-circuit diffusion via crystallite boundaries.

At a later stage of growth the films consisted of large oxide grains containing randomly distributed dislocations of well defined sub-boundaries. These films exhibited non-uniform growth which has been attributed to the short-circuit diffusion of nickel via dislocations of sub-boundaries oriented approximately perpendicular to the plane of the film.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: Development and Optimization of Sodium Magnetic Resonance Advanced Techniques in the In Vivo Assessment of Human Musculoskeletal Tissue

contributor:
Noseworthy, Michael D.
Biomedical Engineering

subject:
Magnetic Resonance Imaging
Sodium
MRI
Quantum Filter
Triple Quantum Filter (TQF)
Non-Cartesian

abstract:
Sodium (23Na) plays a pivotal role in cellular homeostasis throughout all life forms. In the human body it has a plethora of physiological functions including regulation of bodily fluids, muscle contraction, neuronal transmission, and connective tissue integrity. The 23Na nucleus can be visualized using magnetic resonance imaging (MRI) because it has spin 3/2 and is the 100% naturally abundant isotope of sodium. However, unlike hydrogen (1H), the nucleus of choice for MRI scanning, 23Na MR clinical applications are almost non-existent, even though it is the second most MR visible nucleus after 1H. This is primarily because 23Na requires its own customized hardware (i.e. radiofrequency RF coil) and software (i.e. pulse sequence/acquisition and image reconstruction techniques). Additionally, 23Na MR is challenging because of significantly lower signal-to-noise ratio (SNR), which translates to a requirement for lengthy scans and lower spatial resolution. Hence, development and optimization of 23Na MR acquisition techniques is an ongoing subject of research. In this dissertation development and optimization of approaches that exploit sodium as a biomarker for musculoskeletal health are described. Specifically, discussions of advanced 23Na MR techniques fall into two main categories: magnetic resonance imaging (MRI) and spectroscopy (MRS).
    The work first explored development of a MRI compatible electrical muscle stimulation (EMS) system that could be used as a consistent alternative to voluntary muscle contraction. A variety of MRI methods were used to confirm the similarity between stimulation and voluntary activation of muscles of the lower leg. In a follow- up study quantum filtered (QF) 23Na MRS was used to assess dynamic changes in skeletal muscle before, during and following voluntary exercise. Total (single quantum filtered, SQF) and bound intracellular sodium (triple quantum filtered, TQF) were measured in 9 healthy subjects with a 12s temporal resolution. Total sodium (SQF) significantly increased 4% (p < 0.01), while bound intracellular sodium content decreased 7% (p < 0.01) with exercise. Both returned to baseline following exercise; TQF after a few seconds and SQF after approximately 12 minutes (p < 0.05). In a preliminary study the MR-compatible EMS unit demonstrated similar QF 23Na MRS results.
    Sodium MR imaging, like typical 1H-MRI scanning, can be performed by rasterizing k-space. However, this approach is both temporally and SNR inefficient. There- fore newer optimized 23Na MRI pulse sequence approaches have been developed. The cost-benefit of extending the acquisition window length in terms of SNR gain and blurring in the in vivo 23Na MRI of the human knee was explored in 3 healthy subjects using a density adapted 3-dimensional projection reconstruction (DA-3DPR) sequence. Mean SNR doubled when the acquisition window was increased from 4 to 25ms. Concurrently, the FWHM, as a measure of cartilage blurring, increased by only 1±0mm across three different sections of articular cartilage. In a second imaging experiment, a pseudo-random 3D non-Cartesian k-space acquisition scheme for 23Na MRI was introduced. This scheme was highly effective in minimizing the aliasing artifacts leading to 9 times less number of shots required to cover k-space compared to a fully-sampled acquisition scheme. Hence, this resulted in a 9-fold reduction in scan time to cover k-space. Images of a resolution phantom and healthy human knee, with 3mm isotropic resolution (zero padded to 1mm isotropic resolution), were reconstructed using a non-uniform fast Fourier transform (NUFFT).

abstract: Dissertation

abstract: Doctor of Philosophy (PhD)


title: Benchmarking of G4STORK for the Coolant Void Reactivity of the Super Critical Water Reactor Design

contributor:
Buijs, Adriaan
Nuclear Engineering

subject: SCWR MCNP GEANT4 G4STORK Benchmark

abstract: The objectives of this thesis were the validation of G4STORK to use it for the investigation of the SCWR lattice cell. MCNP6 was chosen as the program that the methodology of G4STORK would be validated against. Over multiple steps, the methodology of G4STORK was matched to that of MCNP6 (described here, 3.4). After each step, the output of the two programs were compared, allowing us to pinpoint why and where discrepancies came about. At the end of this process, we were able to show that when G4STORK used the same assumptions as MCNP6, it produced similar results (shown here, 4.1.4). The results of G4STORK simulating the SCWR lattice cell, using its more accurate default methodology, was then compared to those of MCNP6 (shown here, 4.2.1). Large differences in the results were seen to occur, because of the inaccurate assumptions used by MCNP6, during transient cases. We concluded that despite the existence of minor discrepancies between the results of MCNP and G4STORK for some cases, G4STORK is still the theoretically more accurate method for simulating lattice cell cases such as these, due to MCNP’s use of the generational method.

abstract: Thesis

abstract: Master of Applied Science (MASc)


title: Rare Gas Fission Yields of Am241 and Am242

contributor:
Thode, H. G.
Physics

subject: rare gas, fission, xenon, krypton, yield curve, neutron, shell

abstract:
The yields of xenon and krypton from the neutron- induced fission of Am241 and Am242
have been measured with a mass spectrometer. This was accomplished by irradiating samples of Am241 for different lengths of time so that the effect of the growth of highly fissionable Am242 could be determined. These studies reveal that both the degree of fine structure in the mass yield curve and the fission-product charge distribution are dependent on the energy of the incident neutrons. This has not been previously observed for any fissioning nuclide. These studies also reveal effects of the 50-neutron shell and of the neutron-proton ratio of the fissioning nuclide on the mass yield curve.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


contributor:
Preston, M.A.
Physics

abstract: Title: The Electric Quadrupole Interaction in Beta-Decay, Author: John M. Pearson, Location: Thode

abstract:
Although it has been customary in beta-decay theory to assume that the field in which the decay electron moves is spherically symmetrical, there is often a strong quadrupole interaction, comparable in magnitude at the nuclear surface to the central interaction. This will couple together different angular momentum states of both the electron and the daughter nucleus. In this work the wave functions of these coupled states have been
obtained by an essentially exact solution of the Dirac equation for an electron in a non-central potential. It was found that the coupling between different daughter nuclear states was 1% at the very most, which is insufficient to account for some observed anomalies in branched decays of strongly deformed nuclei.

abstract: Thesis

abstract: Doctor of Philosophy (PhD)


title: The Mathematical Simulation of a Three-Feed Demethanizer-Absorber

contributor:
Johnson, A. I.
Chemical Engineering

subject: mathematical, simulation, three-feed, demethanizer-absorber

abstract: The steady state and dynamic behaviour of a demethanizer-absorber have been studied using the IBM 7040 computer. The model considers as many as 10 components and 30 ideal trays, and three feeds to the column are permitted; this allows comparison with a real column in the Polymer Corporation plant in Sarnia. The steady state solution is obtained using the Thiele-Geddes calculational procedure and the θ-method of inducing convergence. In addition other means of ensuring convergence have been extended and tested. The transient model was studied using a third-order Runge-Kutta process. Although successful, this method was extremely slow. Equilibrium constant data in numerical form based on the Braun charts have been presented and tested. The enthalpy correlations of Yen and Alexander have also been examined and used.

abstract: Thesis

abstract: Master of Engineering (MEngr)


contributor:
Webber, M.J.
Geography

abstract: Title: Empirical Tests of an Entropy Maximizing Model of Retail Location and Consumer Behaviour, Author: Morton E. O'Kelly, Location: Thode

abstract:
The aim of this research paper is to show that entropy maximising
models of urban land use are better than first generation large scale land use
models. In order to substantiate this claim it will be argued that entropy
maximising models are internally consistent, theoretically based, realistic
and parsimonious.

First it is shown that an extended family of consistent spatial
interaction models can be built using the entropy maximising (information
minimising) formalism.

The second step is to develop a detailed model. The model presented
represents several aspects of urban spatial interaction. In the model,
individuals are assigned to place of residence, place of work and shop trip
pattern for an arbitrary distribution of service centres. An entropy statistic,
defined over the assignment of individuals is used to determine, endogenously,
the entropy maximising distribution of centres. Thus, the model predicts
the location of retail facilities as well as residential location, shopping
patterns and work trip interchanges. The model also has a theoretical
basis in that results using a similar formulation for a linear city show
that the entropy maximising distribution of service centres includes
downtown.
 Having set up a theoretically based, consistent model, the next
step is to establish that this model produces a realistic representation
of the city. Data from Hamilton, Ontario are used to test the fit of the
model.

Results show that the model reproduces the observed data with some
accuracy. Furthermore, the endogenously predicted distribution of service
centres includes downtown. This result supports the contention that
theoretically based entropy models can produce realistic results, and
establishes the argument of the paper.

abstract: Thesis

abstract: Master of Arts (MA)


title: The Partial Oxidation of Ortho-Xylene in a Transported-Bed Reactor

contributor:
Hoffman, T. W.
Chemical Engineering

subject: partial oxidation, ortho-xylene, transported-bed, reactor, catalytic

abstract:
 The partial, catalytic oxidation of ortho-xylene was investigated in a transported-bed reactor in which the vanadium pentoxide catalyst in the form of extremely small particles (average particle size of 45 microns) was conveyed upward by the reacting gases.

 The reaction was studied at a contact time of about 0.2 seconds, at air-to-o-xylene molar ratios of 42 to 86, at catalyst-to-gas ratios of 8 to 23, and at a reaction temperature of 750°F (400°C).

 Reaction products were analyzed by Gas Chromatography and Nuclear Magnetic Resonance Spectroscopy.

 Product analysis indicated a high yield of o-tolualdehyde, small yields of other oxidation products, but only trace amounts of phthalic anhydride. These results are consistent with proposed mechanisms for this reaction.

abstract: Thesis

abstract: Master of Engineering (MEngr)


contributor:
Kramer, James R.
Geography and Geology

abstract: Title: Physical and Chemical Aspects of Granite Weathering in North Central New Brunswick, Author: Richard B. Needham, Location: Thode

abstract:
The purpose of this study is to describe the forms
produced and processes involved in the weathering of granite
in North Central New Brunswick. This is accomplished by
the analysis of physical, geochemical and petrographic
evidence gathered in the field and laboratory.

The field work was done in the summer of 1978 while
working for the Geological Survey of Canada under the
supervision of C. Gauthier. The study of the granite was
of interest because of:
(1) The development of unusual granite forms and "deep"
accumulation of angular grus in the vicinity of Big Bald
Mountain.
(2) The development and exposure of a deep (4 m) weathering
profile along the south branch of the Nepisiguit River.
The presence of these granite weathering profiles
and forms are of special significance to the glacial history
of the area because their presence may suggest that the area
has not been glaciated.

abstract: Thesis

abstract: Bachelor of Arts (BA)


title: Analytical Audit Flowcharting Graphics

contributor:
Masterson, J.
Computation

subject: analytical, audit, flowcharting, graphics, computer, terminal, parametric

abstract:
 This project is a contribution towards the development of one component of an analytical
audit flowcharting system using computer graphics. The component to be developed will be concerned with producing graphical displays on an intelligent graphics terminal; the configuration of these displays is determined by parametric data supplied through the terminal keyboard. The software is designed in such a way that input options may be exercised to experiment with the shape and size of the component parts of the flowchart.

abstract: Thesis

abstract: Master of Science (MSc)


title: FOUNDATIONAL WORK FOR A NATIONAL RESEARCH PROGRAM IN ORGAN DONOR CARE

contributor:
Meade, Maureen
Health Research Methodology

subject:
organ donation
prospective cohort study
waived consent model

abstract:
This thesis is divided in three chapters: (i) introduction to organ donation, (ii) rationale, implementation and design of a pilot observational study currently underway and (iii) justification for use of a waived consent model for observational research studies on organ donor care.
Organ donation is a complex event that remains a mystery to most health care providers. The first chapter reports knowledge gaps in clinical management of deceased organ donors across Canada and summarizes ongoing trials in organ donor care. The persistent deficit in transplantable organs along with the limited scientific evidence to guide the clinical management of the organ donor justify the need for a national research program in organ donor care.
There are logistical and methodological challenges unique to the design and conduct of research on deceased donors. To identify potential stakeholders involved in the process of organ donation and to provide an accurate description of usual management of deceased donor and assess its variability, we developed and initiated a prospective observational study called DONATE. The second chapter of this thesis described the pilot phase of this study. It contains the following sections: i) objectives of the study ii) the screening process, iii) data collection, iv) clinical outcomes, v) methods of measurement, vi) analysis plan and vii) strategies used to minimize the biases inherent to observational studies.
The normative goal of obtaining informed consent from participants may not be appropriate for an observational study in organ donor care. The third chapter summarizes the justification for use of a waived consent model for observational studies of organ donation medicine. In this chapter, I discuss regulatory, ethical and logistical issues relevant to use of a waived consent model in organ donation research.

abstract: Thesis

abstract: Master of Science (MSc)

abstract: Organ donation saves lives and it is the most effective therapy available to treat end stage organ failure of a number of organs. Unfortunately, there is a growing gap between the number of donors and the number of patients waiting for transplantation. This thesis summarizes the foundational work of a national research program in deceased donor management. It describes the study design of a 4 centre prospective observational study in deceased donor management with outcome assessment on corresponding organ-recipients. This thesis also contains a justification for waiving the procurement of consent to research on organ donor management. Finally, it will inform investigators of future national multicentre observational studies on design and implementation issues related to donor management, in order to improve care provided to donors and outcomes of recipients while reducing the gap between transplant needs and organ supply.


title: The gender binary, the third space, and public university washrooms

contributor:
Marwah, Inder
Political Science

abstract: Sexed bathrooms are key locations for sex and gender violence and oppression. Recent political events have made the problem of gendered bathrooms in public spaces much more visible. This project aims to address this issue in part as an iteration of the ways that gender and sex can be critiqued and practiced. It presents and critiques the problem of the gender binary from two perspectives—the feminist, and the feminist poststructuralist—and argues that Homi Bhabha’s third space approach to constructing identity offers us a unique way of critiquing the gender binary while keeping in mind the discursiveness, and fluidity of gender, but also the fundamentality to which many people ascribe their own gender identity. As a demonstration of the way the third space can address the problem of the gender binary this project contextualizes the third space by applying it to gender neutral washrooms. It will also offer case studies of two Canadian universities—Queen’s and Victoria—who have put gender neutral washrooms in place on their campuses.

abstract: Thesis

abstract: Master of Arts (MA)


title: Methodological challenges in evidence gathering and assessment for guideline development in rare diseases: an example from hemophilia

contributor:
Iorio, Alfonso
Health Research Methodology

subject:
care models
delivery of health care
hemophilia
integrated care
guideline methodology
indirect evidence
chronic conditions
health care team

abstract: The guideline development process can be challenging when diseases are rare. The development of the NHF-McMaster Guideline on Care Models for Hemophilia Management presented an opportunity to identify methodological challenges for guideline development in rare diseases. Several methodological challenges were identified in the evidence gathering and assessment stages. Eight challenges were presented in the development of a systematic review on care models for hemophilia management. The barriers to conducting the systematic review were mostly due to the paucity of high quality evidence in hemophilia care models. Due to the paucity of high-quality evidence typical of a rare condition such as hemophilia, indirect evidence from other chronic conditions were sought through an overview of reviews. Seven challenges were identified in the development of an overview on integrated multidisciplinary care for the management of chronic conditions in adults. The barriers were mainly due to unestablished methodology for conducting overviews, and the challenge of applying this evidence in the context of hemophilia for the guideline. To overcome the methodological challenges with evidence gathering and assessment for rare disease guideline development, the decision-making process to derive solutions were transparently presented. Overall, the methodological challenges as well as apparent facilitators from a rare disease setting are shown to be related to the barriers and facilitators at the research, clinical, and guideline development phase. As a result, using an example from hemophilia, this thesis has demonstrated that it is possible to develop high quality guidelines for rare diseases.

abstract: Thesis

abstract: Master of Science (MSc)