• Canada
• Scholarship at UWindsor close

The Pea Ridge Fe-oxide deposit is hosted by a sequence of 1.45--1.48 Ga rhyolite tuffs of the St. Francois terrane of S.E. Missouri. Mineralization comprises early actinolite-apatite-magnetite alteration and a magnetite-apatite orebody. Rare earth elements (REE) in these stages are concentrated in monazite inclusions within apatite. Hematite replaces magnetite around the margins of the orebody. Subsequent alteration of the host rhyolites resulted in the sequential deposition of quartz, andalusite, muscovite and K-feldspar, indicating that an acidic fluid at temperatures above 341°C increased in pH and decreased in temperature during alteration. Comparisons previously made with the Olympic Dam deposit are justified based on the presence of hematite-REE breccias and quartz-sericite alteration. However important differences exist, most notably the presence of andalusite and alkali feldspar, abundant apatite and monazite (rather than bastnasite), actinolite rather than chlorite, negative rather than positive Eu anomalies, higher Th/U ratios and much lower Cu. (Abstract shortened by UMI.)Dept. of Earth Sciences. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1998 .K47. Source: Masters Abstracts International, Volume: 39-02, page: 0461. Adviser: I. M. Samson. Thesis (M.Sc.)--University of Windsor (Canada), 1998.

The contribution critically discusses Walton's (and Reed’s and Macagno’s) argumentation scheme approach. On the one hand, its enormous richness and closeness to the empirical argumentation material is appreciated, but, on the other, fundamental conceptual weaknesses are revealed. Although the approach more recently has been declared to strive for “true beliefs and correct choices” it has not systematically developed the proposed schemes in a way that these goals are reached. Accordingly, many proposed schemes are fallacious from an epistemological standpoint.

In contemporary copyright law, there is an ongoing debate around the nature and scope of the rights users should have to copyright works, exacerbated by ongoing technological developments. Within that debate, this article queries the value of looking at the remedies users may have against copyright holders restricting their legitimate uses of works, as a means to further elucidate the nature and scope of user rights. While there is some value in looking at remedies to situate copyright user rights, an access to justice perspective to rights and remedies suggests that such approach may be too limiting with respect to the position of potential claimants in a legal system. On that basis, this paper identifies structural deficiencies of copyright user rights and proposes an analytical framework towards achieving greater &ldquo both in the realm of public law and private law. justice for users&rdquo

© 2015, Springer International Publishing Switzerland. The geographic range of an invasive species is a key determinant of relative impact in the invaded region. Comparison of invasive species that are widespread or rare in invaded ranges can highlight mechanistic traits that determine the risk of impact from invasion. Round Goby (Neogobius melanostomus) is more geographically widespread and abundant than Tubenose Goby (Proterorhinus semilunaris) across invaded ranges of the Laurentian Great Lakes. We used stable isotopes of carbon (δ13C) and nitrogen (δ15N) in liver and muscle to contrast the isotopic niche breadth and niche plasticity of Round Goby and Tubenose Goby near the inflow and outflow of Lake St. Clair and in western Lake Superior. At all sites, Round Goby and Tubenose Goby that matched in size (21–53 mm standard length) had distinct isotopic niches with no overlap, driven by higher δ15N in Round Goby. The variation in isotopic niche, and the mean difference in δ13C and δ15N between muscle and liver, was greater for Round Goby, suggesting both greater seasonal shifts in diet and niche plasticity in this more widely established invader. Round Goby that were significantly larger than Tubenose Goby had broader isotopic niches and greater niche plasticity in the majority of cases and this was associated with isotopic niche overlap with smaller Round Goby and Tubenose Goby. Our findings suggest that a broad and plastic isotopic niche provides scope for wider establishment range in invasive fish species.

This thesis deals with the synthesis of [2]rotaxanes with single and double sites of recognition, containing pyridinium ethane units in their linear components. In the first part, one pyridinium ethane axle with a triethylphosphonium group on one end was synthesized and the possibility of its complexation with 24C8 derivatives was investigated. Although [2]pseudorotaxane formation was limited due to the bulk of the PR4+ stopper, [2]rotaxanes were formed utilising 24-crown-8 ether, benzo-24-crown-8 ether and naphtho-24-crown-8 ether. The crystal structure of the [2]rotaxane containing 24C8 was determined. The dynamic "flip-switch" activity of the asymmetric crown ethers was analysed by variable temperature NMR experiments and two translational isomers for each were observed. The second part of the thesis describes the novel synthesis of a [2]rotaxane molecular shuttle containing two identical ethane sites connected by a bipyridinium centre in the thread component. The symmetrical DB24C8 ring shuttles between the two sites. The originality of the method consists of first creating one bonding site, then introducing the crown ether, the second site and stopper at the same time. In addition, the effect of the solvent on the motion of the crown was investigated. It was determined that the shuttling of the crown between the two sites is faster in acetonitrile than in methylene chloride. (Abstract shortened by UMI.)Dept. of Chemistry and Biochemistry. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2003 .G4674. Source: Masters Abstracts International, Volume: 43-01, page: 0218. Adviser: Stephen J. Loeb. Thesis (M.Sc.)--University of Windsor (Canada), 2004.

In this thesis we investigate the effects of stiffness, damping and temperature on the performance of a MEMS vibratory gyroscope. The stiffness and damping parameters are chosen because they can be appropriately designed to synchronize the drive and sense mode resonance to enhance the sensitivity and stability of MEMS gyroscope. Our results show that increasing the drive axis stiffness from its tuned value by 50%, reduces the sense mode magnitude by ~27% and augments the resonance frequency by ~21%. The stiffness and damping are mildly sensitive to typical variations in operating temperature. The stiffness decreases by 0.30%, while the damping increases by 3.81% from their initial values, when the temperature is raised from -40 to 60C. Doubling the drive mode damping from its tuned value reduces the oscillation magnitude by 10%, but ~0.20% change in the resonance frequency. The predicted effects of stiffness, damping and temperature can be utilized to design a gyroscope for the desired operating condition.

This study examined coping skills and experiences of childhood abuse and neglect in four groups of offenders (i.e., those who have committed Sexual (SO), Violent (VO), Violent and Sexual (VSO), and Other offences), and in two subgroups of sexual offenders (i.e., child molesters and perpetrators against peers/adults). The study also sought to determine whether coping skills predicted the severity of sexual offending, as gauged by the number of victims, the degree of victim-offender physical contact, and the variety of sexually abusive behaviours. Archival data on 471 adolescent males from two correctional facilities in Michigan were used. Coping was assessed using the Youth Coping Index, while abuse variables were assessed using the Childhood Trauma Questionnaire and the Sexual Abuse Exposure Questionnaire. Biased responding was controlled for using Paulhus's Social Desirability Index. Multiple regression analyses failed to detect a relationship between coping styles and the severity of sexual offending. SO and non-SO showed no differences in their reliance on masturbatory coping, but VO were more likely to use aggression as a means of coping than those who committed nonviolent offenses. A 2 x 2 MANCOVA found that experiences of childhood Sexual Abuse, Emotional Abuse and Neglect, Physical Abuse and Coping using Incendiary Communication and Tension Management were higher in SO than in those who committed non-sexual offences. Non-sexual offenders were more likely to report Coping using Positive Appraisal and Problem Solving. VO obtained higher scores on Physical Neglect and Coping using Incendiary Communication and Tension Management than those who committed non-violent offenses. Logistic regression analysis indicated that Sexual Abuse predicted SO status, and Physical Neglect and Coping using Incendiary Communication and Tension Management predicted VO status. Child molesters reported more experiences of Physical Neglect than perpetrators against peers/adults, but the two types of sexual offenders did not differ on the other predictors. The implications of these findings for clinical work and research are discussed.Dept. of Psychology. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2004 .U545. Source: Dissertation Abstracts International, Volume: 66-02, Section: B, page: 1188. Adviser: Steve Hibbard. Thesis (Ph.D.)--University of Windsor (Canada), 2004.

Populations of Redside Dace Clinostomus elongatus have declined in many areas across the species' North American range. Therefore, the development of sperm cryopreservation technology would provide an invaluable means of preserving genetic diversity in populations that are in imminent danger of extirpation. We developed cryopreservation protocols by testing the effects of diluent (buffered sperm motility-inhibiting saline solution [BSMIS]; BSMIS+ glycine; sucrose; and Hanks' balanced salt solution [HBSS]), cryoprotectant (dimethyl sulfoxide [DMSO]; propylene glycol [PG]; N,N-dimethylacetamide [DMA]; and methanol), freezing rate (1, 5, and 10 degrees C/min), and male-to-male variation on sperm quality. Incubating sperm in extenders affected motility; BSMIS+ glycine + methanol, BSMIS+ glycine + PG, and HBSS + methanol were the only treatments for which motility was not significantly different from that of fresh sperm. Sperm frozen with sucrose had higher motility than sperm frozen with BSMIS + glycine, and sperm frozen with DMSO had higher motility than sperm frozen with methanol. Freezing rates were evaluated for BSMIS + glycine, HBSS, and sucrose; all diluents were frozen with DMSO. The effect of freezing rate was not significant for BSMIS + glycine or for HBSS, but an effect was detected for sucrose, with sperm frozen at 5 degrees C/min or 10 degrees C/min having higher motility than sperm frozen at 1 degrees C/min. The effect of extender was not significant at 1 degrees C/min or 5 degrees C/min, but an effect was detected at 10 degrees C/min such that sperm frozen with sucrose had the highest motility. Male-to-male variability was evaluated by using sucrose + DMSO and a freezing rate of 10 degrees C/min. For these males, the sperm motility recovery index ranged from 6.67% to 79.27%, and the sperm velocity recovery index ranged from 21.37% to 57.33%. Our findings demonstrate that cryopreservation of Redside Dace sperm in a sucrose + DMSO extender at a freezing rate of 10 degrees C/min is adequate for preserving genetic diversity via sperm banks. Received August 27, 2012; accepted December 1, 2012

Source: Masters Abstracts International, Volume: 40-07, page: . Thesis (M.Sc.)--University of Windsor (Canada), 1987.