cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Role of Nej1-Lif1 in Double Strand Break Repair Pathway Choice and Non-Homologous End-Joining
Creators: name: Sorenson, Kyle
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biology--Molecular
subject: Biochemistry
subject: Pathway choice
subject: Resection
subject: Non-homologous end-joining (NHEJ)
subject: Double-strand breaks
subject: Budding yeast

description: DNA Double strand breaks (DSBs) are the most deleterious form of DNA damage. Improper repair of DSBs can result in genomic instability and failed repair of even a single DSB results in cell death. Homologous recombination (HR) and Non-homologous end-joining (NHEJ) are the two major pathways of DSB repair and both are highly conserved from yeast to mammals. The choice between these pathways is largely based on 5’ to 3’ resection of DNA at the break site. Resection inhibition favours NHEJ, while extensive resection facilitates HR. The MRX complex, which plays a role in both HR and NHEJ in yeast, promotes the initiation of end-resection at the broken ends, while YKu70/80 rapidly binds DSB ends to prevent the initiation of 5’resection. Nej1 and Lif1 are two NHEJ proteins shown previously to promote the ligation of DSB ends by stimulating Dnl4 ligase activity. The Nej1-Lif1 interaction is also required for additional functions in NHEJ, except these functions were previously uncharacterized. Using nej1-F335A and nej1-V338A mutants that are unable to interact with Lif1, I show that the Nej1-Lif1 interaction plays a role in preventing end-resection initiation at broken ends in a manner epistatic with YKu70/80. Specifically, I demonstrate that Nej1-Lif1 prevents the Sgs1-Dna2 dependent initiation of end-resection to promote NHEJ pathway choice. I also show that the Nej1-Lif1 interaction plays a role in preventing genomic stability during DSB repair in a redundant manner with the end-bridging function of the Rad50 subunit of the MRX complex. Finally, the effect of Rad50 and Nej1 mutants on the nuclear periphery re-location of persistent DSB ends to either Mps3 or the nuclear pore complex (NPC) were studied. I show that cells lacking RAD50 absolutely require the NPC to survive even endogenous DNA damage, while cells harboring nej1Δ, yku70Δ, nej1-F335A or nej1-V338A mutants preferentially require Mps3 to promote cell survival and prevent genomic instability during the repair of persistent DSBs.
A Dynamic Systems Approach to Modelling Human-Machine Rhythm Interaction
Creators: name: Yuan, Zhongju
name: Van Ransbeeck, Wannes
name: Wiggins, Geraint
name: Botteldooren, Dick
Publisher: name: arXiv
Year: 2024
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: In exploring the simulation of human rhythmic perception and synchronization capabilities, this study introduces a computational model inspired by the physical and biological processes underlying rhythm processing. Utilizing a reservoir computing framework that simulates the function of cerebellum, the model features a dual-neuron classification and incorporates parameters to modulate information transfer, reflecting biological neural network characteristics. Our findings demonstrate the model's ability to accurately perceive and adapt to rhythmic patterns within the human perceptible range, exhibiting behavior closely aligned with human rhythm interaction. By incorporating fine-tuning mechanisms and delay-feedback, the model enables continuous learning and precise rhythm prediction. The introduction of customized settings further enhances its capacity to stimulate diverse human rhythmic behaviors, underscoring the potential of this architecture in temporal cognitive task modeling and the study of rhythm synchronization and prediction in artificial and biological systems. Therefore, our model is capable of transparently modelling cognitive theories that elucidate the dynamic processes by which the brain generates rhythm-related behavior.
Fusion of Terrestrial and Airborne Laser Data for 3D Modeling Applications
Creators: name: Mohammed, Hani
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Geotechnology
subject: Laser Scanner
subject: Fusion
subject: 3D modeling
subject: Registration
subject: Classification

description: This thesis deals with the 3D modeling phase of the as-built large BIM projects. Among several means of BIM data capturing, such as photogrammetric or range tools, laser scanners have been one of the most efficient and practical tool for a long time. They can generate point clouds with high resolution for 3D models that meet nowadays’ market demands. The current 3D modeling projects of as-built BIMs are mainly focused on using one type of laser scanner data, such as Airborne or Terrestrial. According to the literature, no significant (few) efforts were made towards the fusion of heterogeneous laser scanner data despite its importance. The importance of the fusion of heterogeneous data arises from the fact that no single type of laser data can provide all the information about BIM, especially for large BIM projects that are existing on a large area, such as university buildings, or Heritage places. Terrestrial laser scanners are able to map facades of buildings and other terrestrial objects. However, they lack the ability to map roofs or higher parts in the BIM project. Airborne laser scanner on the other hand, can map roofs of the buildings efficiently and can map only small part of the facades. Short range laser scanners can map the interiors of the BIM projects, while long range scanners are used for mapping wide exterior areas in BIM projects. In this thesis the long range laser scanner data obtained in the Stop-and-Go mapping mode, the short range laser scanner data, obtained in a fully static mapping mode, and the airborne laser data are all fused together to bring a complete effective solution for a large BIM project. Working towards the 3D modeling of BIM projects, the thesis framework starts with the registration of the data, where a new fast automatic registration algorithm were developed. The iii next step is to recognize the different objects in the BIM project (classification), and obtain 3D models for the buildings. The last step is the development of an occlusion removal algorithm to efficiently retain parts of the buildings occluded by surrounding objects such as trees, vehicles, or street poles.
Freestyle Urbanism: A Collaborative Approach for Healthy Public Space Design
Creators: name: Junnila, Leanne
Publisher: name: Environmental Design
Year: 2017
Subjects: subject: Urban and Regional Planning
subject: FOS: Social and economic geography
subject: health
subject: social engagement
subject: public space

description: In order to explore how the socio-political determinants of health in the built environment might inform the design of public space, major works of literature on the socio-politics of space and public health were reviewed. Tactical Urbanism and Integral Urbanism were selected as key models, which formed the basis of my theoretical framework. Data from the Active Neighbourhoods Project offered citizen input on areas for improvement in the selected community of Bridgeland, in Calgary, Canada. The key themes from the lilterature were laid out as a ‘thematic grid’, which was applied to selected neighbourhood sites in order to identify site-specific opportunities. These opportunities formed site-specific design objectives for the proposed redevelopment of a demonstration site: the Luke’s Drug Mart Plaza site in NorthEast Calgary.
Enhancement of Tc in the Superconductor-Insulator Phase Transition on Scale-Free Networks
Creators: name: Bianconi, Ginestra
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A road map to understand the relation between the onset of the superconducting state with the particular optimum heterogeneity in granular superconductors is to study a Random Tranverse Ising Model on complex networks with a scale-free degree distribution regularized by and exponential cutoff p(k) \propto k^{-γ}\exp[-k/ξ]. In this paper we characterize in detail the phase diagram of this model and its critical indices both on annealed and quenched networks. To uncover the phase diagram of the model we use the tools of heterogeneous mean-field calculations for the annealed networks and the most advanced techniques of quantum cavity methods for the quenched networks. The phase diagram of the dynamical process depends on the temperature T, the coupling constant J and on the value of the branching ratio / where k is the degree of the nodes in the network. For fixed value of the coupling the critical temperature increases linearly with the branching ration which diverges with the increasing cutoff value ξor value of the γexponent γ< 3. This result suggests that the fractal disorder of the superconducting material can be responsible for an enhancement of the superconducting critical temperature. At low temperature and low couplings T<<1 and J<<1, instead, we observe a different behavior for annealed and quenched networks. In the annealed networks there is no phase transition at zero temperature while on quenched network we observe a Griffith phase dominated by extremely rare events and a phase transition at zero temperature. The Griffiths critical region, nevertheless, is decreasing in size with increasing value of the cutoff ξof the degree distribution for values of the γexponents γ< 3.
description: (17 pages, 3 figures)
Stability and angular-momentum transport of fluid flows between corotating cylinders
Creators: name: Avila, Marc
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Turbulent transport of angular momentum is a necessary process to explain accretion in astrophysical disks. Although the hydrodynamic stability of disk-like flows has been tested in experiments, results are contradictory and suggest either laminar or turbulent flow. Direct numerical simulations reported here show that currently investigated laboratory flows are hydrodynamically unstable and become turbulent at low Reynolds numbers. The underlying instabilities stem from the axial boundary conditions, affect the flow globally and enhance angular-momentum transport.
description: 11 pages, 4 figures
A Brief Study Related to Treatment of Sigmund Freud'S Maxillary Jawbone Cancer by Hans Pichler and Varaztad Kazanjian
Creators: name: Riaud, Xavier
Publisher: name: Zenodo
Year: 2021
Subjects: Cancer
history of medicine
surgery
verrucous carcinoma

description: Ackerman’s tumour is a rare histological form of carcinoma, currently recognised as a clinical and independent histopathological entity. It can grow at all membrane levels located in the upper aerodigestive tract but occurs most frequently in oral cavities. From 1919 to his death, Sigmund Freud was treated for a maxillary jawbone cancer by two exceptional surgeons, the Austrian, Hans Pichler, and the American, Varaztad Kazanjian. Fleeing the Nazi regime, he went into exile in England where he died after numerous recurrences of the disease.
Search for resonant production of $t\bar{t}$ decaying to jets in $p\bar p$ collisions at $\sqrt{s}=1.96$ TeV
Creators: name: CDF Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This Letter reports a search for non standard model topquark resonances, $Z'$, decaying to $t\bar{t} \rightarrow W^+b W^-\bar{b}$ %\rightarrow qq'b qq' \bar{b}$, where both $W$ decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of $\ppb$ collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb$^{-1}$. No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model with width of $Γ_{Z'} = 0.012 M_{Z'}$. Within this model, we exclude $Z'$ boson with masses below 805 GeV$/c^2$ at the 95% confidence level.
description: 8 pages, 4 figues
The role of integrin-linked kinase in platelet-derived growth factor stimulated vascular smooth muscle cell migration
Creators: name: Abdoli Yazdi, Sahar
Publisher: name: University of British Columbia
Year: 2010

description: Background: Vascular smooth muscle cell migration and accumulation in response to growth factors extensively contribute to the development of intimal thickening within the vessel wall. Cumulative evidence has shown that actin cytoskeleton polymerization and rearrangement are critical steps during cellular spreading and migration. Integrin-linked kinase, an intracellular serine/threonine kinase, is a cytoplasmic interactor of integrin beta-1 and beta-3 receptors and has been reported to regulate cell-cell and/or cell-extracellular matrix interaction, cell contraction, extracellular matrix modification, and cell spreading and migration in response to various stimuli. However, the regulatory role of ILK during vascular smooth muscle cell migration and the importance of integrin signaling in occlusive vascular diseases have not yet been elucidated. Results: In the present study, we report that integrin-linked kinase controls mouse aortic smooth muscle cell migration in response to platelet-derived growth factor. We have also identified p38 mitogen activated protein kinase as a downstream signaling pathway of the integrin-linked kinase that regulates platelet-derived growth factor- induced actin polymerization and smooth muscle cell migration. Conclusion: This study provides new insight into the potential therapeutic value of modulating integrin signaling in an attempt to block or delay smooth muscle cell migration and the progression of vascular diseases.
Investigation of the maximum amplitude increase from the Benjamin-Feir instability
Creators: name: Karjanto, N.
name: van Groesen, E.
name: Peterson, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76B15, 35Q55

description: The Nonlinear Schrödinger (NLS) equation is used to model surface waves in wave tanks of hydrodynamic laboratories. Analysis of the linearized NLS equation shows that its harmonic solutions with a small amplitude modulation have a tendency to grow exponentially due to the so-called Benjamin-Feir instability. To investigate this growth in detail, we relate the linearized solution of the NLS equation to a fully nonlinear, exact solution, called soliton on finite background. As a result, we find that in the range of instability the maximum amplitude increase is finite and can be at most three times the initial amplitude.
description: 9 pages, 4 figures, presented in IAMS-Netherlands Seminar 2002
Asymptotic properties of the spectrum of neutral delay differential equations
Creators: name: Kyrychko, Y. N.
name: Blyuss, K. B.
name: Hoevel, P.
name: Schoell, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Spectral properties and transition to instability in neutral delay differential equations are investigated in the limit of large delay. An approximation of the upper boundary of stability is found and compared to an analytically derived exact stability boundary. The approximate and exact stability borders agree quite well for the large time delay, and the inclusion of a time-delayed velocity feedback improves this agreement for small delays. Theoretical results are complemented by a numerically computed spectrum of the corresponding characteristic equations.
description: 14 pages, 6 figures
The Experiences, Opinions and Use of Complementary and Alternative Medicine (CAM) among Alberta Midwives
Creators: name: Oguaju, Chinelo
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Education--Health
subject: Health Sciences
subject: Nursing
subject: FOS: Health sciences
subject: Obstetrics and Gynecology
subject: Public Health
subject: Complementary and Alternative Medicine (CAM)
subject: Midwives
subject: Alberta

description: Background: Midwives are maternity care providers who may recommend or provide CAM to assist with their clients’ pregnancy and childbirth, and early neonatal health. Objectives: To describe use, experiences, opinions and perceived CAM educational needs of midwives in Alberta. Method: A descriptive survey of Alberta Midwives. Result: The response rate was 23.7%. Slightly more than 90% of the participating midwives very often recommend CAM and 45.8% very often provide CAM to their patients. Client preferences and scientific evidence of efficacy were the most common reasons for recommending CAM. More than two-thirds (70.8%) of respondents believed that they lacked adequate CAM education. Participant midwives support the use of CAM and its integration into midwifery. Conclusion: CAM was frequently recommended by the midwives who participated in this study. However, the majority of the participants indicated that they lack adequate CAM knowledge and education. Consequently, providing more CAM education opportunities is needed.
MPEC 2023-W145 : EIGHT NEW TNOS
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: EIGHT NEW TNOS

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Two coupled Jaynes-Cummings cells
Creators: name: Xue, Peng
name: Ficek, Zbigniew
name: Sanders, Barry C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a theoretical framework to evaluate the energy spectrum, stationary states, and dielectric susceptibility of two Jaynes-Cummings systems coupled together by the overlap of their respective longitudinal field modes, and we solve and characterize the combined system for the case that the two atoms and two cavities share a single quantum of energy.
description: 7 pages, 4 figures
The Impact of the Implementation of the Nigerian Curriculum Initiatives on Secondary School Administrators and Teachers in Enugu State
Creators: name: Nzekwe, Osondu Jude
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Education--Curriculum and Instruction
subject: Curriculum
subject: Implementation
subject: Classroom practices

description: This study explored the impact of the implementation of the new Nigerian curriculum initiatives on the professional practices of selected school administrators and teachers from 4 secondary schools in Enugu education zone. Ten teachers and one school administrator each from Anglican, Catholic, Public, and Private secondary schools participated in the study. I employed qualitative case study utilizing the constructivist paradigm. Data collection was done using a one-time 60-90 minutes face to face semi structured interviews with each participant, document analysis, and site observation of participants’ schools. Combining Stake (1995) categorical aggregation and direct interpretation, data analysis and interpretation was done by reading and re-reading the interview scripts, memos, and the observation field notes underlining emerging themes and categories. MacShane and Von Glinow’s (2003) MARS model of individual behaviour and performance was applied as a theoretical framework to make meaning of the emerging themes and categories. The findings of the study showed that school administrator participants who carry heavy workload, lack institutional autonomy, lack funds to provide teacher’s needs, and are poorly paid have their professional practices negatively impacted by the implementation of the new Nigerian curriculum initiatives as they could not function well as facilitators of the curriculum implementation. Findings also showed lack of principal’s support and motivation, work overload, poor remuneration, and lack of instructional materials as what made the implementation of the new Nigerian curriculum initiatives impact negatively on teachers’ professional practices. The findings suggest providing teachers and administrators with relevant instructional materials, support and motivation, commensurate remuneration, and manageable workload as they struggle with the implementation of the new curriculum initiatives. Findings also suggest the necessity of allowing school administrators some autonomy in running their schools and providing them with necessary funds to achieve their goals.
Hodge-Lyubeznik numbers
Creators: name: Lopez, Ricardo Garcia
name: Sabbah, Claude
Publisher: name: arXiv
Year: 2024
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14B15, 13D45, 32S35

description: We define a Hodge-theoretical refinement of the Lyubeznik numbers for local rings of complex algebraic varieties. We prove that these numbers are independent of the choices made in their definition and that, for the local ring of an isolated singularity, they can be expressed in terms of the Hodge numbers of the cohomology of the link of the singularity. We give examples of isolated singularities with the same Lyubeznik numbers but different Hodge-Lyubeznik numbers.
description: V2: Final version, a few signs and typos corrected, Example 1 on p. 7 and Remark (a) on p. 8 added
Traumatic Appropriation in Maus and In The Shadow of No Towers
Creators: name: Nolan, Liam
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Literature--Comparative
subject: Comics
subject: Trauma
subject: Spiegelman

description: There are immense ethical concerns surrounding depicting another’s trauma and turning another’s trauma into a commodity for sale in the marketplace. Of these problems, competition and the denigration of the narratives of trauma sufferers are two of the most pervasive problems. Though comics are often considered low art – unfit for serious themes – through an examination of Art Spiegelman’s In the Shadow of No Towers and Maus, this thesis explores how one can utilize structural qualities of comics to create a moral depiction of trauma by embracing intertextuality and duplicating the structures of trauma. Intertextuality can allow an artist to deploy the cultural capital of certain traumatic events towards the recognition of other traumatic events.
Paleoecologic Controls on Early Triassic Refugia Distribution
Creators: name: Godbold, Amanda
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Paleoecology
subject: Refugia
subject: End-Permian Extinction
subject: Recovery
subject: Panthalassic Ocean

description: The end-Permian extinction (~252 ma) was the largest extinction event to have occurred during the Phanerozoic, resulting in the elimination of up to 78% of marine genera. Recovery from such a catastrophic event did not occur until the Middle Triassic, likely owing to prolonged environmental stress. Many have speculated as to the process with which marine ecosystems recovered following this event. The development of marine refugia, sanctuaries to which organisms migrate during time of environment stress, is one hypothesis. The focus of this thesis is to examine the distribution of marine refugia during the end-Permian extinction. Geochemical and paleoecologic data suggest that mid-depth settings deposited under oxic conditions are conducive to the development of refugia, by offering relief from lethally hot sea surface temperatures. In contrast, geochemical and paleoecologic data collected from two open Panthalassic seamounts suggest that these settings are not conducive to the development of marine refugia, potentially due to decreases in immigration rates owing to the development of a temperature barrier between oceanic islands and the continental margin.
Phenomenological Yoga: An Husserlian Approach to Patañjali's Yogasūtra
Creators: name: Humphrey, William Townsend
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Religion
subject: Religion--Philosophy of
subject: Theology
subject: yoga
subject: phenomenology
subject: Patañjali
subject: Husserl, Edmund
subject: comparative philosophy

description: This thesis examines Patañjali’s Yogasūtra, a Sanskrit treatise on the theory and practice of yoga, in light of the philosophy of Edmund Husserl, a key figure in the 20th century philosophical movement known as phenomenology. Using Husserl’s distinction between the natural attitude and the phenomenological reduction, this thesis distinguishes between two respective hermeneutical approaches to the Yogasūtra: the natural-cosmological and the transcendental-phenomenological. While a case can be made for either approach, this thesis argues that the latter proves to be more cogent and fruitful. It thereby explores the Yogasūtra’s metaphysics as an account of the principles that structure conscious experience, and it explores the Yogasūtra’s meditative praxis, particularly the meditative states known as samprajñāta samādhi and samāpatti, as the clarification of pure experience, in a spirit similar to Husserl’s phenomenological reduction.
Refined Prognostication in Coronary Artery Disease Using Routine Laboratory Test Data
Creators: name: Gerling, Michael
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Epidemiology
subject: Prognostication
subject: Risk Score
subject: coronary artery disease
subject: Routine Laboratory Data
subject: Vitamin D

description: Coronary artery disease (CAD) is a leading cause of morbidity and mortality. Numerous prognostic scores have been developed that rely on clinical information to predict risk of adverse outcomes and subsequently aid clinicians in determining appropriate intervention strategies. This thesis examines the ability of laboratory test data, including the complete blood count (CBC), electrolytes, estimated glomerular filtration rate (eGFR), and 25-OH vitamin D, to improve prognostic assessment in CAD patients beyond existing clinical risk factors. Although 25-OH vitamin D status was found to be inversely associated with mortality, it was neither associated with nor predictive of hospital readmission, and provided little additional prognostic information beyond existing risk factors. Conversely, a risk score derived from components of the CBC, electrolytes, and eGFR, in conjunction with age and sex, was strongly predictive of mortality, and led to considerable improvement in the ability to identify high-risk patients beyond existing risk factors.
The Influence of Diffusion Strategies on the Competition of Two Spatially Distributed Populations in Heterogeneous Environment
Creators: name: Kamrujjaman, Md.
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Education--Mathematics
subject: Economics--Agricultural
subject: Sociology--Theory and Methods
subject: Animal Culture and Nutrition
subject: Fisheries and Aquaculture
subject: Ecology
subject: FOS: Biological sciences
subject: Carrying capacity driven diffusion
subject: Ideal free distribution
subject: Competition
subject: Evolutionary stability
subject: System of partial differential equations

description: We study reaction-diffusion equations describing population dynamics of single harvested species and of two competing species. The main aim of the thesis is to study the roles of two different diffusion strategies: the regular diffusion and the directed diffusion. In directed diffusion, rather than the population itself, its ratio to either locally available resources (carrying capacity) or to a positive distribution function diffuses. We focus on how directed diffusion, especially, carrying capacity driven dispersion in the habitat influences selection. For single species, we present comparative numerical results between carrying capacity driven diffusion and regular diffusion for Gilpin-Ayala type growth and harvesting. For two competing species, we study the interaction between different types of dispersal: one of them is subject to a regular diffusion while the other moves in the direction of most per capita available resources. If spatially heterogeneous carrying capacities coincide, and intrinsic growth rates are proportional then competitive exclusion of a regularly diffusing population is inevitable. When the resource function of a regularly diffusing population is higher than of the other species, the two populations may coexist. For symmetric growth, we consider the case when the ideal free distribution is attained as a combination of the two strategies adopted by the two species. Then there is an ideal free pair, and the relevant coexistence equilibrium is a global attractor. In the event that only one of the diffusion strategies is proportional to the carrying capacity, we prove the competitive exclusion of the other species. In case of weak competition, both species can coexist even only one of the species adopts the ideal free dispersal strategy. When one of the species is following the directed dispersal strategy and the other is dispersing regularly, there is a unique coexistence solution if the difference between the carrying capacity and the directed function is a positive constant. Coexistence can be a result of the interplay of different diffusion coefficients or growth rates.
The Network of French Legal Codes
Creators: name: Mazzega, Pierre
name: Bourcier, Danièle
name: Boulet, Romain
Publisher: name: arXiv
Year: 2012
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose an analysis of the codified Law of France as a structured system. Fifty two legal codes are selected on the basis of explicit legal criteria and considered as vertices with their mutual quotations forming the edges in a network which properties are analyzed relying on graph theory. We find that a group of 10 codes are simultaneously the most citing and the most cited by other codes, and are also strongly connected together so forming a "rich club" sub-graph. Three other code communities are also found that somewhat partition the legal field is distinct thematic sub-domains. The legal interpretation of this partition is opening new untraditional lines of research. We also conjecture that many legal systems are forming such new kind of networks that share some properties in common with small worlds but are far denser. We propose to call "concentrated world".
The Association Between Income and Patient-Reported Diabetes Care: Results of a Cross-Sectional Survey
Creators: name: Saad, Nathalie
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Epidemiology
subject: Income
subject: Diabetes
subject: Access
subject: Care

description: The main objective of this study was to evaluate the association between income and indicators of access to care as well as indicators of guideline-concordant recommended care in patients with diabetes and poor glycemic control. We used data from a cross-sectional telephone survey of outpatients with diabetes and linked this data with administrative and laboratory data. The study population included adult outpatients living in Calgary, Alberta with diabetes. The exposure was the total household income in the prior 12 months, as reported by survey respondents. We conducted a poisson regression analysis to determine the association between income and each of the outcome variables. We found that participants with an annual household income of < $20,000 were less likely to report taking recommended aspirin as well as statin therapy compared to those with an annual household income > $50,000. Further research is required to delineate the underlying reasons for these results.
Generalization of the Central Limit Theorem to Critical Systems: Revisiting Perturbation Theory
Creators: name: Sahu, Sankarshan
name: Delamotte, Bertrand
name: Rançon, Adam
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Central Limit Theorem does not hold for strongly correlated stochastic variables, as is the case for statistical systems close to criticality. Recently, the calculation of the probability distribution function (PDF) of the magnetization mode has been performed with the functional renormalization group in the case of the three-dimensional Ising model [Balog et al., Phys. Rev. Lett. {\bf 129}, 210602 (2022)]. It has been shown in that article that there exists an entire family of universal PDFs parameterized by $ζ=\lim_{L,ξ_\infty\rightarrow\infty} L/ξ_\infty$ which is the ratio of the system size $L$ to the bulk correlation length $ξ_{\infty}$ with both the thermodynamic limit and the critical limit being taken simultaneously. We show how these PDFs or, equivalently, the rate functions which are their logarithm, can be systematically computed perturbatively in the $ε=4-d$ expansion. We determine the whole family of universal PDFs and show that they are in good qualitative agreement with Monte Carlo data. Finally, we conjecture on how to significantly improve the quantitative agreement between the one-loop and the numerical results.
description: v1) 15 pages, 11 figures; v2) minor corrections
High-energy emission from the pulsar striped wind: a synchrotron model for gamma-ray pulsars
Creators: name: Pétri, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: (abridged) Gamma-ray pulsars constitute a class of high and very high-energy emitters for which the known population is steadily increasing thanks to the Fermi/Large Area Telescope. In this paper, their gamma-ray luminosity and spectral features are explained in the framework of synchrotron radiation from particles located in the stripe of the pulsar wind. Apart from radiative losses, particles are also subject to a constant re-acceleration and reheating for instance by a magnetic reconnection induced electric field. The high-energy luminosity scales as $L_γ\approx 2\times10^{26} \textrm{W} \, (L_{\rm sd}/10^{28} \textrm{W})^{1/2} \, (P/1 \textrm{s})^{-1/2}$ where $L_{\rm sd}$ is the pulsar spindown luminosity and $P$ its period. From this relation, we derive important parameters of pulsar magnetosphere and wind theories. Indeed, we find bulk Lorentz factor of the wind scaling as $Γ_{\rm v} \approx 10 \, τ_{\rm rec}^{1/5} \, (L_{\rm sd}/10^{28} \textrm{W})^{1/2}$, pair multiplicity $κ$ related to the magnetization parameter $σ$ by $κ\,σ\, τ_{\rm rec}^{1/5} \approx 10^8$, and efficiency $η$ of spin-down luminosity conversion into particle kinetic energy according to the relation $η\,σ\approx1$. A good guess for the associated reconnection rate is then $τ_{\rm rec} \approx 0.5 \, (L_{\rm sd}/10^{28} \textrm{W})^{-5/12}$. Finally, pulses in gamma-rays are visible only if $L_{\rm sd}/P\gtrsim 10^{27} \textrm{W/s}$. This model differs from other high-energy emission mechanisms because it makes allowance not only for rotational kinetic energy release but also for an additional reservoir of energy anchored to the magnetic field of the stripe and released for instance by some magnetic reconnection processes.
description: 5 pages; 2 figures; accepted by MNRAS
Sand Control in Steam Assisted Gravity (SAGD) Wellbores
Creators: name: Fermaniuk, Brent
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Engineering--Petroleum
subject: Sand

description: Steam Assisted Gravity Drainage (SAGD) is a thermal recovery technology used to produce heavy oil and high viscosity bitumen from Alberta oil sands. The oil sands of Alberta are unconsolidated sands which require sand control within the horizontal wellbores to reduce the erosive power of the sand and plugging of sand control screens. Slotted liners have been extensively used in Alberta’s SAGD wells to provide sand control. Slotted liner slot width specifications can be effectively designed based on the particle size distribution of the in-situ reservoir sands and coupled reservoir parameters. Modified laser particle size analysis can simulate a sieve analysis to determine slot width sand control requirements and provide a means to estimate the particle size for stable arching of sand around a slot during production. The slot must be designed to allow free flow of fines and clays through the slot and near well pore space without plugging. Based on the findings of research documented in this thesis, the minimum slot width for the majority of slotted liners used for sand control in clastic heavy oil and bitumen formations is 0.012” (~300 μm). The results also reveal that a seamed slot, which provides a “keystone” profile, provides anti-plugging characteristics. Slotted liner manufacturing is a complex process of metal-to-metal slotting of an interrupted cut. Pipe grades, process of manufacture, chemical composition and physical properties can dramatically affect the machinability tool-life and sand control. The results of the research also show that machinability of the pipe is largely controlled by the combination of optimal microstructure (manufacture) and chemical composition (specifically sulfur content). Sulphur content has been widely known to improve machinability but too high of a sulphur content can have dramatic effects on the performance of a slotted liner when H2S is present. Tool-life tests proved that the carbon content of the pipe cannot be used as a predictor of the pipe’s machinability. Taylor’s tool-life equation can be successfully applied to blade slotting and a metric developed here, called the Relative Material Machinability Index, has can be used to relate slot manufacturing performance of differing grades of pipe, microstructure, and chemical composition.
On p-Compact mappings and p-approximation
Creators: name: Lassalle, Silvia
name: Turco, Pablo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46G20, 46B28

description: The notion of $p$-compact sets arises naturally from Grothendieck's characterization of compact sets as those contained in the convex hull of a norm null sequence. The definition, due to Sinha and Karn (2002), leads to the concepts of $p$-approximation property and $p$-compact operators, which form a ideal with its ideal norm $κ_p$. This paper examines the interaction between the $p$-approximation property and the space of holomorphic functions. Here, the $p$-compact analytic functions play a crucial role. In order to understand this type of functions we define a $p$-compact radius of convergence which allow us to give a characterization of the functions in the class. We show that $p$-compact holomorphic functions behave more like nuclear than compact maps. We use the $ε$-product, defined by Schwartz, to characterize the $p$-approximation property of a Banach space in terms of $p$-compact homogeneous polynomials and also in terms of $p$-compact holomorphic functions with range on the space. Finally, we show that $p$-compact holomorphic functions fit in the framework of holomorphy types which allows us to inspect the $κ_p$-approximation property. Along these notes we solve several questions posed by Aron, Maestre and Rueda in [2].
description: 30 pages
Cultural and Linguistic Lived Experiences of Chinese Student Newcomers in an EAP Program at a Western Canadian University
Creators: name: Lin, Chuanmei
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Education--Bilingual and Multicultural
subject: Cultural
subject: Linguistic
subject: Chinese
subject: EAP

description: This study investigates the cultural and linguistic lived experiences of Chinese international student newcomers in an EAP program at a western Canadian university and whether or not intercultural transformations occur in English learning. As Chinese English learners are immersed in the Canadian tertiary education settings, their normative assumptions about knowledge will be challenged. However, through the ongoing process of trial and error, they have experienced a cultural and linguistic integration which accelerates their adaptation to the host country. This study employs qualitative case studies as the selected methodology to document my participants’ identities, investment, and imagined communities which are embedded in their personal trajectories. There are eight themes that emerge from the data collected from the semi-structured one-on-one interviews with ten participants. Gender disparity is also visible in the study’s findings; shaping how learners transformed their identities within the larger society. This study aims to offer an epistemic lens and methodological contribution for western universities and instructors to increase the efficiency of the support offered to the Chinese student body who share the same aspiration to flourish in their future endeavors in a multicultural society, such as the one that exists in Canada.
Pursuing Postponement: The Eisenhower Administration's Policymaking for the Developing World
Creators: name: Smith, Brenan
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: History--United States
subject: Dwight Eisenhower
subject: John Foster Dulles
subject: Richard Nixon
subject: Policy-making
subject: Third World
subject: Postponement
subject: Vice President Nixon

description: This dissertation examines the Eisenhower administration’s positions and policies towards the developing world. During the presidency of Dwight Eisenhower, the complications involved in conducting an increasingly global Cold War presented Eisenhower and his officials with extensive and expanding problems. Nationalism, anti-colonialism, pushes for economic rebalancing, and other forms of self-assertion surged in regions across the globe described in this dissertation as the “Third World.” In Africa, Latin America, the Middle East, and Southeast Asia a variety of drives against the status quo confronted the Eisenhower administration, and Eisenhower in particular, with challenges of immense importance. The central focus of this dissertation is how Eisenhower chose to meet those challenges, and how officials like John Foster Dulles and Richard Nixon supported and agreed or (more often in Nixon’s case) diverged and disagreed with the President on his choices. This dissertation argues that Eisenhower chose to pursue a policy of postponement toward the Third World; not necessarily attempting to maintain the status quo, but seeking to delay and otherwise slow the forces of change at work in the Third World. Richard Nixon, by dint of his contentious mentor-protégé relationship with John Foster Dulles, and the fact that he simultaneously served as a crucial tool in, and active critic of Eisenhower’s policies and positions in the Third World, provides a representative example of the many officials in Eisenhower’s administration who perceived and disagreed with the pursuit of postponement. Dulles too, though more often than not a strident supporter of Eisenhower, was intrinsically torn between his duty and his fundamental belief in the necessity of dynamic foreign policies. This study explores the means by which Eisenhower pursued postponement in the Third World, and complications and frustrations which arose during this ultimately doomed pursuit.
Towards accurate in situ dissolved gas concentration estimations in gas-charged groundwater using field measured total dissolved gas pressure (PTDG)
Creators: name: Evans, Randal
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: Geology
subject: Hydrology
subject: Environmental Sciences
subject: dissolved gas
subject: total dissolved gas pressure
subject: gas-charged groundwater

description: To date, there are currently no dissolved gas sampling standard operating procedures and total dissolved gas pressure (PTDG) is seldom utilized in dissolved gas sampling. This study assessed the accuracy of dissolved gas concentrations from common sampling approaches in eight gas-charged groundwater monitoring wells in central and southern Alberta, and investigated how measurement of groundwater PTDG can improve their success. Measurement of real-time, downhole PTDG while pumping was necessary in gas-charged groundwater to obtain in situ gas pressure that represented the formation around the well screen. Gas mass loss occurred by drawdown-induced ebullition and was unavoidable in the standing water column or pump tubing when gas-charged groundwater was pumped to surface for sampling. All four dissolved gas sampling approaches, but particularly gas-water separation, were susceptible to atmospheric contamination, which was sometimes associated with methane oxidation. This study highlights the need for improved gas sampling methodology to obtain accurate dissolved gas concentrations.
Intelligence Systems Failures in Responding to Threats from Afghanistan
Creators: name: Hossack, Samantha
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Economics--History
subject: History--Middle Eastern
subject: History--Military
subject: History--Russian and Soviet
subject: History--United States
subject: Military Studies
subject: Political Science
subject: FOS: Political science
subject: Political Science--International Law and Relations
subject: Intelligence Systems
subject: Afghanistan
subject: Soviet Union
subject: United States
subject: Military History
subject: Intelligence Production
subject: Intelligence Consumption
subject: Military Strategy

description: The Soviet Union and United States wars in Afghanistan are widely considered disastrous affairs. The involvement of both states in Afghanistan resulted from intelligence systems failures, characterized by issues related to trust that caused a power imbalance between the intelligence community and the decision maker. In this thesis, I examine both the Soviet and American intelligence systems, testing the effectiveness of intelligence production and intelligence consumption. I further analyze the character traits of key members of the intelligence systems, the levels of bureaucracy, and the relationship between the intelligence community and decision makers, emphasizing an analysis of the levels of trust. I conclude that these two case studies represent instances when intelligence systems failed because decision makers placed too much or too little trust in the intelligence community.