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Energy transfer between dark matter and gas during collisions
Get PDF1 online resource (vii, 43 pages) : colour charts, graphsIncludes abstract.Includes bibliographical references (pages 42-43).Using the simulation code GIZMO, two different configurations of dark matter and gas were collided at three different resolutions in order to study the energy transfer between the dark matter and gas. The first configuration is of two dark matter halos offset from a central gas distribution. Energy was transferred from the dark matter into the gas, and an increase in the gas temperature and kinetic energy occurred. The second configuration is of two mixed gas and dark matter halos offset from each other. This collision sees a spike in temperature initially, and then an adiabatic expansion and cooling that leaves the gas cooler then it was initially, while also seeing an increase in kinetic energy. When normalized by taking the energy values as a ratio of the initial total energy, the energy transfer from the dark matter to the gas ended up being roughly the same value ( 0.025) for the two collisions, at the highest resolutions
Confronting colonial legacies and neoliberal hegemony in global health and development : creative Cuban social medicine adaptions from Venezuela to Timor-Leste
Get PDF1 online resource (392 pages) : colour illustrations, colour maps, charts, graphsIncludes abstract.Includes bibliographical references (pages 362-392).Despite recent and significant declines in health outcomes and health services in Cuba as well as a retreat of Cuba's medical internationalist program, this dissertation argues that there is a potential wealth of lessons to be learned from Cuba's successes and challenges in both Timor-Leste and Venezuela, particularly throughout the 2003-2020 era. Cuba provides particularly important considerations, especially in its assistance to developing Venezuela’s Misión Barrio Adentro (MBA) primary public health programme, that could help overcome fragmented Global North healthcare systems which struggle with the hospitalization of primary care to reimagine a truly patient-centred, team-based, proactive/preventive primary care and education system. Cuban efforts in Timor-Leste also have significant potential internationally in development efforts which could capacitate, through their creative medical education programmes, those in the Global South to meet their own health needs in an effort to buttress against future pandemics and global health
challenges. In both examples, Cuba accomplished these feats with comparatively far less material and financial resources than Global North development efforts. However, Cuba's subaltern healthcare example has often been dismissed by many, either explicitly as part of a larger neoliberal geo-political project, or unconsciously, assumed by many to be too poor or undeveloped a country to learn from. As such, with the help of a political economy framework, this dissertation will evidence how health outcomes cannot be separated from power and inequality, nor can subaltern / oppressed voices reach those who would benefit from their knowledge in the current neoliberal hegemony
Trivial pursuit for safer science labs
Get PDF1 online resource (89 pages) : colour charts, colour graphsIncludes abstract and appendices.Includes bibliographical references (pages 57-68).This study examines the impact of instructional formats on learning, retention of laboratory
safety knowledge, and participant satisfaction. Using a multi-framework approach integrating safety psychology and educational theories, we compared traditional lectures to interactive trivia-based learning. Participants were randomly assigned to one of the two safety training formats. Effectiveness was assessed at baseline, immediately after treatment, and at a two-week follow-up to evaluate knowledge retention and behaviours. Participants also rated their satisfaction and perceived performance after the intervention.
Results showed both formats significantly improved safety knowledge from pre- to posttreatment, while only the lecture group experienced a significant decline at the two-week follow-up. Satisfaction surveys indicated that trivia-based participants reported significantly higher satisfaction and perceived better performance compared to the lecture group. These findings suggest that while both methods are effective, integrating interactive elements like trivia can enhance engagement, boost confidence, and improve satisfaction in safety training
Evaluating the magmatic history, magmatic source fertility, and metal contributions to goldbearing hydrothermal systems, Mooshla Intrusive Complex, Doyon-Bousquet-LaRonde mining camp, Abitibi Greenstone Belt, Quebec
Get PDF1 online resource (432 pages) : illustrations (some colour), maps (some colour), charts (some colour), graphs (some colour)Includes abstract.Includes bibliographical references (pages 28-38, 91-113, 379-393).The Mooshla Intrusive Complex is an Archean polyphase tonalite-trondhjemite-quartz
diorite-gabbroic magmatic body located in the Doyon-Bousquet-LaRonde mining camp of the Abitibi greenstone belt, Québec, Canada. The complex is spatially and temporally associated with numerous gold-rich volcanogenic massive sulfide, epizonal intrusion-related Au ± Cu, and shear zone-hosted orogenic gold and/or remobilized volcanogenic massive sulfide deposits. The intrusive complex has been characterized by numerous methods including high-precision U-Pb geochronology, accessory mineral trace element composition (i.e., zircon, titanite, anhydrite, quartz), silicate melt inclusions, and isotopic analyses. This provides a comprehensive study on the melt and pressure-temperature-time evolution of the magmatic system and potential influence the system had in supplying metals to the gold deposits. Additionally, two gold deposits hosted in the Mooshla Intrusive Complex have been studied to document the ore mineralogy and trace element and isotopic characteristics that aid in identifying a magmatic fluid source for these systems
Drivers of functional diversity in native Ericaceae species across Nova Scotia
Get PDF1 online resource (50 pages) : colour illustrations, maps, charts (some colour), graphs (some colour)Includes abstract and appendix.Includes bibliographical references (pages 46-50).Plant functional diversity is defined by variation in morphological, chemical, or phenological characteristics that influence the way a plant functions. Variation in such traits across different species can be influenced by evolutionary history and environmental factors. Functional traits can also vary within species, and the level of within-species trait plasticity can vary among species and habitats. This study investigates the relative influence of evolutionary history and environmental variation (light, nutrient availability, water) in driving plant functional diversity across 24 species from the Ericaceae family. Plants were sampled across three habitat types (barren, bog, and forest) in Nova Scotia. Morphological traits measured were specific leaf area (SLA), leaf dry matter content (LDMC), leaf thickness (Lth), leaf size (LS), and leaf arrangement (alternate or opposite). Chemical traits measured were leaf pH, and phenological traits were leaf lifespan (evergreen or deciduous) and flowering strategy (precocious or serotinous). Leaf arrangement, leaf lifespan, and leaf pH were influenced by evolutionary history, but the relative influence of evolutionary history was weaker at the family level than at a broader taxonomic scale. All traits were influenced by environmental factors and all traits except
leaf pH and leaf arrangement are likely driven more by variation in light than soil water
availability. In addition, some species exhibited higher trait plasticity than others. Understanding which environmental factors influence traits, which species had higher levels of plasticity, and the role that evolution and the environment play in shaping those traits is important to understand how species will cope with increasing environmental pressures from climate change
Measurement of charge-changing cross section of neutron-rich nitrogen isotopes for determining their proton radii
Get PDF1 online resource (x, 84 pages) : illustrations, charts (some colour), graphs (some colour)Includes abstract.Includes bibliographical references (pages 78-84).Exploring neutron-rich nuclei near the drip-line exposes exotic phenomena, including neutron halo or skin and the (dis)appearance of the existing magic numbers. A systematic study of point proton radii along an isotopic chain provides insights into the extended neutron wavefunction’s impact on protons. This work, conducted at RIKEN, Japan, presents the first determination of the charge-changing cross section (σcc) for 23N as well as the σcc for 21N, with a secondary beam energy of around 250Α MeV. The measured σcc values for 21N and 23N were 752 ± 4 mb and 747 ± 3 mb, respectively. Their comparable σcc suggests that the center-of-mass of the two valence neutrons in 23N is not spatially separated from that of the core. Combined with the previously reported σcc of 22N, these results indicate a shell closure at Ν = 16 for nitrogen isotopes. A higher two-neutron separation energy in 23N supports the presence of a shell closure at N = 16 and raises questions about the reported large matter radius of this drip-line nitrogen isotope.</p
Becoming a critically engaged storyteller: an interrogation of ArcGIS StoryMaps as a public communication tool in archaeology
Get PDF1 online resource (iv, 59 pages) : colour illustrations, colour maps, chartsIncludes abstract.Includes bibliographical references (pages 56-59).Despite their responsibility to share the findings of their research with the public, archaeologists have not always done so in a way that is accessible and engaging to public audiences. This thesis examines the ArcGIS StoryMaps feature developed by the GIS software company Esri to determine if it can serve as a useful tool for accessible and engaging public communication in the discipline of archaeology. For this research, a StoryMap about the archaeological excavations at Isert Kelly Castle, a towerhouse site in Co. Galway in Ireland, was created and shared on social media and information was gathered from three other archaeological groups who have employed StoryMaps. Through an analysis of the social media engagement data and other analytics that were gathered about this StoryMap as well as the information gathered from the other archaeological groups, numerous advantages of the platform for archaeologists were uncovered.
StoryMaps offer a unique opportunity for archaeologists to easily integrate current digital
datasets (e.g. 3D models, hypermedia, digital mapping) and interactivity into their work while simultaneously unravelling an intriguing archaeological narrative that is engaging to the public. Furthermore, by embracing the role of a “critically engaged storyteller” and the “multiple perspective model” of public archaeology, archaeologists can use StoryMaps to engage with the public in a way that democratizes the discipline, making it more accessible, ethical, open to criticism, and inclusive of a plurality of perspectives. This thesis suggests that the platform has numerous features that are particularly advantageous for archaeologists as critically engaged storytellers, including the editability and general accessibility of StoryMaps, and their ability to effectively engage with existing audiences. A more accessible and engaging archaeology is also beneficial for the public who draw their own personal value from and form their own individual interpretations about archaeological research
A synthetic investigation of substituted cyclopentadienyl complexes of bismuth and germanium
Get PDF1 online resource (xiv, 76 pages) : illustrations, chartsIncludes abstract and appendix.Includes bibliographical references (pages 57-64).A series of novel cyclopentadienyl bismuth and germanium metal complexes were prepared by using the sterically bulky 2,6-bis(2,4,6- trimethylphenyl)phenylcyclopentadienyl (TerMesCp) ligand. Mono-, bis-, and trisTerMesCp metal complexes were prepared by reacting TerMesCp-K with the metal halides: GeCl2, BiCl3, and BiI3. The bismuth complexes, TerMesCpBiI2, (TerMesCp)2BiI, and (TerMesCp)3Bi contained trigonal pyramidal bismuth metal centers coordinated to the cyclopentadienyl ring with hapticities of η1. The intermediate germanium complex, TerMesCpGeCl, contained a germanium metal center coordinated to the cyclopentadienyl ring with a hapticity of η1. Upon further reactivity, cationic germanium species [TerMesCpGe][GaCl4] and [TerMesCpGe][ B(3,5-CF3-C6H3)] were synthesized with germanium metal centers coordinated to the cyclopentadienyl ring with hapicities of η4 and η3 respectively. In some cases, stabilizing aryl interactions with the mesityl ring of the TerMesCp ligand are present. Cationic germanium species, [TerMesCp-Ge]+ , were synthesized by chloride abstraction from the germanium chloride using GaCl3, or by metathesis with Na[B(3,5-CF3-C6H3)]
An investigation of the applications of localization delocalization matrices on the prediction of reaction characteristics
Get PDF1 online resource (vii, 38 pages) : illustrations, charts, graphsIncludes abstract and appendix.Includes bibliographical references (pages 32-37).The localization delocalization matrix (LDM) is a complete chemical graph that ties the quantum theory of atoms in molecules (AIM) with chemical graph theory (CGT), allowing for quantitative structure activity relationships (QSAR) to be developed. The utility of the LDM for mechanistic analysis has been explored, and the mean topological contribution of the Frobenius distance between mechanisms has been isolated as a potential metric for analyzing mechanistic similarity. The mechanisms of two crossed dimerization reactions of substituted 1,3,5,7-cyclooctatetraenes have been computationally explored using density functional theory (DFT)
Developmental Divergence of Tendon
Get PDF1 online resource (iv, vii, 147 pages) : illustrations (some colour), charts (some colour), graphs (some colour)Includes abstract and appendix.Includes bibliographical references (pages 106-147).Tendinopathies cause some of the most prevalent disabilities in Canada, giving rise to
both widespread suffering and socioeconomic stress. Effective treatments remain elusive, and the incidence of tendinopathy is increasing. In recent years, the implantation of artificial tendon has emerged as a possible method for restoring tendon function. However, attempts at developing implants that mimic tendon properties have been hindered by insufficient knowledge of tendon development. To improve collective understanding, the present research investigated the fetal development of two functionally distinct tendons with characteristics that, in maturity, are fine tuned for the distinct mechanical roles each class of tendon experiences in life: the bovine energy storing superficial digital flexor tendon and positional common digital extensor tendon. Functional
intermolecular cross–linking and morphology were evaluated via hydrothermal isometric tension testing, transmission electron microscopy, and polarized light microscopy. Structural idiosyncrasies identified between the two functionally distinct tendons during gestation, across all three methods of analysis, suggested the combined effect of differences in other early developmental cues — rather than mechanoregulation — to be the principal catalyst for the initial divergence of multiple tendon–specific characteristics. This finding points to prenatal tendon development as a rich area for future study of the control mechanisms responsible for the structure of collagenous tissues