cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Numerically efficient modeling of saturable ac machines for power systems electromagnetic transients simulation programs
Creators: name: Therrien, Francis
Publisher: name: University of British Columbia
Year: 2015

description: Extensive computer simulations are necessary to operate power systems in a stable, secure, and optimal manner. This thesis considers electromagnetic transients (EMT) simulators, which are widely used to study modern power systems of which rotating machines are essential components. In EMT simulations, induction and synchronous machines are usually represented by general-purpose lumped-parameter models, which can be formulated using different sets of coordinates and state variables. While algebraically equivalent, these models’ numerical properties can differ greatly, which in turn can significantly affect the numerical accuracy and efficiency of entire EMT simulations. The ultimate goal of this thesis is to increase the numerical efficiency of EMT simulators without degrading their numerical accuracy and stability. This is achieved by proposing several new machine models with improved numerical properties. Models are presented for both families of EMT simulators, namely nodal-analysis-based (EMTP-type) and state-variable-based (SVB) programs. Moreover, we incorporate the effect of saturation to improve modeling fidelity. This thesis makes several important contributions to the state of the art. As a first step, the implicit flux correction (FC) method frequently used in SVB programs is reformulated to achieve explicit qd models with main flux saturation. Next, we propose new highly efficient saturable SVB voltage-behind-reactance (VBR) machine models with constant-parameter interfacing circuits. A new and accurate EMTP-type VBR induction machine model with a saturation-independent interfacing circuit is then proposed, thereby avoiding numerically costly re-factorizations of the network’s conductance matrix. Finally, the numerical efficiency of this VBR model is further improved by using multirate techniques. Numerous case studies demonstrate the superior combination of numerical accuracy and efficiency of the proposed models, and their beneficial impact on the speed of EMT simulations. It is envisioned that the proposed models will eventually be included in commercial EMT programs, extending their reach to thousands of engineers worldwide.
Turbulence in Zeeman Measurements from Molecular Clouds
Creators: name: Cao, Zhuo
name: Li, Hua-bai
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Magnetic fields (B-fields) play an important role in molecular cloud fragmentation and star formation, but are very difficult to detect. The temporal correlation between the field strength (B) and gas density (n) of an isolated cloud has been suggested as an indication of the dynamical importance of B-fields relative to self-gravity. This temporal B-n relation is, however, unobservable. What can be observed using Zeeman measurements are the "spatial B-n relations" from the current plane of the sky. Nevertheless, the temporal B-n relation argument has still been widely used to interpret observations. Here we present the first numerical test of the legitimacy of this interpretation. From a simulation that can reproduce the observed Zeeman spatial B~n^2/3 relation, we found that temporal B-n relations of individual cores bear no resemblance to the spatial B-n relations. This result inspired us to discover that the true mechanism behind the 2/3 index is random turbulence compression instead of symmetrical gravitational contraction.
description: accepted by ApJL
Identification of a Helium Donor Star in NGC 247 ULX-1
Creators: name: Zhou, Changxing
name: Feng, Hua
name: Bian, Fuyan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: With Very Large Telescope (VLT) Multi Unit Spectroscopic Explorer (MUSE) observations, we detected highly variable helium emission lines from the optical counterpart of the supersoft ultraluminous X-ray source (ULX) NGC 247 ULX-1. No Balmer lines can be seen in the source spectrum. This is the first evidence for the presence of a helium donor star in ULXs, consistent with a prediction that helium donor stars may be popular in ULXs. The helium lines with a FWHM of about 200 km/s are likely produced on the outer accretion disk. Their strong variation implies that the central X-ray source can be significantly obscured to the outer disk. Also, a ring or a double-ring structure is revealed in the MUSE image. It is unknown whether or not it is related to the progenitor of the ULX binary.
description: accepted for publication in ApJ
Effects of turbulent mixing on critical behaviour in the presence of compressibility: Renormalization group analysis of two models
Creators: name: Antonov, N. V.
name: Kapustin, A. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 76F30

description: Critical behaviour of two systems, subjected to the turbulent mixing, is studied by means of the field theoretic renormalization group. The first system, described by the equilibrium model A, corresponds to relaxational dynamics of a non-conserved order parameter. The second one is the strongly non-equilibrium reaction-diffusion system, known as Gribov process and equivalent to the Reggeon field theory. The turbulent mixing is modelled by the Kazantsev-Kraichnan "rapid-change" ensemble: time-decorrelated Gaussian velocity field with the power-like spectrum k^{-d-ξ}. Effects of compressibility of the fluid are studied. It is shown that, depending on the relation between the exponent ξand the spatial dimension d, the both systems exhibit four different types of critical behaviour, associated with four possible fixed points of the renormalization group equations. The most interesting point corresponds to a new type of critical behaviour, in which the nonlinearity and turbulent mixing are both relevant, and the critical exponents depend on d, ξand the degree of compressibility. For the both models, compressibility enhances the role of the nonlinear terms in the dynamical equations: the region in the d-ξplane, where the new nontrivial regime is stable, is getting much wider as the degree of compressibility increases. In its turn, turbulent transfer becomes more efficient due to combined effects of the mixing and the nonlinear terms.
description: 25 pages, 4 figures
УПРАВЛЕНИЕ МАРКЕТИНГОВОЙ ДЕЯТЕЛЬНОСТЬЮ РЕГИОНАЛЬНЫХ ТОРГОВЫХ СЕТЕЙ НА ПОТРЕБИТЕЛЬСКИХ РЫНКАХ
Creators: name: ПАВЛОВСКАЯ ВИКТОРИЯ ЮРЬЕВНА
Publisher: name: Практический маркетинг
Year: 2020
Subjects: КОНКУРЕНТНАЯ СРЕДА
РОЗНИЧНАЯ ТОРГОВЛЯ
КОНКУРЕНТНЫЕ ПРЕИМУЩЕСТВА
ТОРГОВАЯ ПЛОЩАДЬ
МАРКЕТИНГОВЫЕ СТРАТЕГИИ РЕГИОНАЛЬНЫХ ТОРГОВЫХ СЕТЕЙ
COMPETITIVE ENVIRONMENT
RETAIL
COMPETITIVE ADVANTAGES
TRADE AREA
MARKETING STRATEGIES OF REGIONAL RETAIL CHAINS

description: Статья посвящена модернизации и развитию организационно-экономического и методического обеспечения маркетинг-менеджмента региональных торговых сетей. Авторский вклад представлен развитием существующих научных взглядов и подходов в следующих основных направлениях: конкурентные преимущества и маркетингово-конкурентные стратегии региональных торговых сетей; региональная торговая сеть как эффективная система маркетинговых каналов продвижения потребительской продукции; перспективные маркетинговые возможности мультиформатной стратегии розничных торговых сетей; маркетинговое управление конкурентоспособностью региональной торговой сети; методика оценки конкурентоспособности региональной торговой сети на региональном потребительском рынке. Информация, полученная в ходе исследования может быть использована при маркетинговом контроле эффективности операционной деятельности и маркетинговых стратегий региональных торговых сетей, маркетинговом планировании и аудите деятельности объектов, включенных в торговую сеть.
Dynamic Gated Recurrent Neural Network for Compute-efficient Speech Enhancement
Creators: name: Cheng, Longbiao
name: Pandey, Ashutosh
name: Xu, Buye
name: Delbruck, Tobi
name: Liu, Shih-Chii
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper introduces a new Dynamic Gated Recurrent Neural Network (DG-RNN) for compute-efficient speech enhancement models running on resource-constrained hardware platforms. It leverages the slow evolution characteristic of RNN hidden states over steps, and updates only a selected set of neurons at each step by adding a newly proposed select gate to the RNN model. This select gate allows the computation cost of the conventional RNN to be reduced during network inference. As a realization of the DG-RNN, we further propose the Dynamic Gated Recurrent Unit (D-GRU) which does not require additional parameters. Test results obtained from several state-of-the-art compute-efficient RNN-based speech enhancement architectures using the DNS challenge dataset, show that the D-GRU based model variants maintain similar speech intelligibility and quality metrics comparable to the baseline GRU based models even with an average 50% reduction in GRU computes.
description: Proceedings of Interspeech 2024
Impossibility of the Existence of the Universal Density Functional
Creators: name: Bobrov, V. B.
name: Trigger, S. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using the virial theorem it is shown that the hypothesis of the existence of the universal density functional is invalid.
description: 3 pages, 0 figures
АНАЛИЗ И УТОЧНЕНИЕ АТРИБУТОВ ПОЗИЦИОНИРОВАНИЯ РЕГИОНА ДЛЯ АУДИТОРИИ ИНВЕСТОРОВ
Creators: name: ПОНОМАРЕВ ИВАН НИКОЛАЕВИЧ
name: СТАРИКОВА МАРИЯ СЕРГЕЕВНА
Publisher: name: Практический маркетинг
Year: 2020
Subjects: ПОЗИЦИОНИРОВАНИЕ РЕГИОНА
ИНВЕСТИЦИОННАЯ ПРИВЛЕКАТЕЛЬНОСТЬ РЕГИОНА
ЦЕЛЕВЫЕ АУДИТОРИИ РЕГИОНА
МАРКЕТИНГ ТЕРРИТОРИЙ
ПРОДВИЖЕНИЕ РЕГИОНА
POSITIONING OF THE REGION
INVESTMENT ATTRACTIVENESS OF THE REGION
TARGET AUDIENCES OF THE REGION
TERRITORY MARKETING
PROMOTION OF THE REGION

description: В статье на основе обобщения теоретических подходов к трактовке сущности и содержания позиционирования на уровне региона обоснована значимость дифференцированного определения критических атрибутов привлекательности регионального продукта для разных целевых аудиторий. Предложено определять наиболее значимые атрибуты позиционирования региона для бизнес-сообщества, исходя из параметров оценки, используемых в публикуемых рейтингах инвестиционной привлекательности. В результате критического сопоставления детерминант, выявленных на основе анализа пяти национальных рейтингов инвестиционной привлекательности, и маркетинговых конструктов, представленных на инвестиционных порталах субъектов ЦФО, сделан вывод о необходимости целевой адаптации позиций регионов под запросы инвесторов. Целесообразно учитывать в системе позиционирования региона параметры экологической среды, криминогенной обстановки, финансовой безопасности, инновационности и стабильности развития.
Selecting and improving the functionality of DNAzymes
Creators: name: Liu, Erkai
Publisher: name: University of British Columbia
Year: 2016

description: DNAzymes are strands of catalytic DNA first discovered in 1994. These species are isolated through in vitro selection and are capable of catalyzing many different types of reactions. RNA-cleaving DNAzymes are one subset that have many biological implications; however, more work needs to be done to make them suitable for therapeutic in vivo applications. Modifying DNAzymes with protein functionalities represents a promising strategy to evolve efficient cleavage in vivo. Chapter 2 described the syntheses of five modified 2'-deoxyuridine triphosphates and the enzymatic incorporation of these modified dUTPs. The modifications were introduced at the 5-position, and consist of a carboxylate group, indole group and napthyl group. The enzymatic incorporation of these modified nucleotide triphosphates evaluated their suitability for use in an in vitro selection. It was found that Vent (exo-) DNA polymerase was able to incorporate all the modified dUTPs successfully. In Chapter 3 and Chapter 4, two all-RNA-cleaving DNAzyme selections were described. DNAzyme clone 25 was selected in Chapter 3 against an HIV RNA target, which had a self-cleavage rate constant of 3.3 min-¹. However, when the DNAzyme was tested for intermolecular cleavage activity, the result was unsatisfactory. It was found that the maximum rate constant had not been reached under 2 µM substrate, indicating a low substrate binding affinity. With this disappointing result, DNAzyme clone 25 was not considered for in vivo studies. Conversely, DNAzyme clone 11 was selected in Chapter 4 and displayed a robust trans-cleavage activity and a high binding affinity towards a c-Myc oncogene target sequence. DNAzyme clone 11 was obtained from this process, which had a self-cleavage rate constant of 0.84 min-¹. The intermolecular cleavage study showed that it had a cleavage kmax of 4.3 min-¹ and Km of 297 nM. The DNAzyme was then shown to be highly sequence-specific. Solid-phase synthesis of the modified DNAzyme was attempted, and the crude oligonucleotide mixture obtained showed trans-cleavage activity. Lastly, Chapter 5 described several failed DNAzyme selections in which no promising active strands were obtained.
A redshifted excess in the broad emission lines after the flare of the $γ$-ray narrow-line Seyfert 1 PKS 2004-447
Creators: name: Hon, W.
name: Berton, M.
name: Sani, E.
name: Webster, R.
name: Wolf, C.
name: Rojas, A. F.
name: Marziani, P.
name: Kotilainen, J.
name: Congiu, E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: PKS 2004-447 is a narrow-line Seyfert 1 (NLS1) harbouring a relativistic jet with gamma-ray emission. On 2019-10-25, the Fermi-Large Area Telescope captured a $γ$-ray flare from this source, offering a chance to study the broad-line region (BLR) and jet during such violent events. This can provide insights to the BLR structure and jet interactions, which are important for active galactic nuclei and host galaxy coevolution. We report X-Shooter observations of enhancements in the broad line components of Balmer, Paschen and He I lines seen only during the post-flare and vanishing 1.5 years after. These features are biased redward up to $\sim$250 km s$^{-1}$ and are narrower than the pre-existing broad line profiles. This indicates a connection between the relativistic jet and the BLR of a young AGN, and how $γ$-ray production can lead to localised addition of broad emission lines.
description: 19 pages, 14 figures, 3 tables, including appendix. Accepted for publication on A&A Letters
Prosody of speech production in latent post-stroke aphasia
Creators: name: Zhang, Cong
name: Li, Tong
name: DeDe, Gayle
name: Salis, Christos
Publisher: name: arXiv
Year: 2024
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This study explores prosodic production in latent aphasia, a mild form of aphasia associated with left-hemisphere brain damage (e.g. stroke). Unlike prior research on moderate to severe aphasia, we investigated latent aphasia, which can seem to have very similar speech production with neurotypical speech. We analysed the f0, intensity and duration of utterance-initial and utterance-final words of ten speakers with latent aphasia and ten matching controls. Regression models were fitted to improve our understanding of this understudied type of very mild aphasia. The results highlighted varying degrees of differences in all three prosodic measures between groups. We also investigated the diagnostic classification of latent aphasia versus neurotypical control using random forest, aiming to build a fast and reliable tool to assist with the identification of latent aphasia. The random forest analysis also reinforced the significance of prosodic features in distinguishing latent aphasia.
Additional file 1 of Turing miRNA into infinite coordination supermolecule: a general and enabling nanoengineering strategy for resurrecting nuclear acid therapeutics
Creators: name: Li, Liya
name: He, Wangxiao
name: You, Weiming
name: Yan, Jin
name: Liu, Wenjia
Publisher: name: figshare
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Information Systems not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 1. Figure S1. Vis-UV spectrum of RNA (miR-30C) and IacsRNA (Iacs-miR-30C). Figure S2. Gene set enrichment analysis (GSEA) showing the cell cycle checkpoints and cell cycle mitotic differentially expressed in response to IacsRNA. Figure S3. Cell cycle of B16F10 cells after 1-day miR-30C and Iacs-miR-30C treatment at a dosage of 100 nM. Figure S4. Representative IF staining for Bcl9 and IHC staining for β-catenin in B16F10 tumors with different treatments. Figure S5. Representative IF staining for c-Myc and Cyclin D1 in B16F10 tumors with different treatments. Table S1. Hydrodynamic diameter at different pH values measured by DLS. Supplementary experimental section.
Game-Changer or Game-Over for Pakistan? An Analysis of the China-Pakistan Economic Corridor
Creators: name: Qamar, Ali Alam
Publisher: name: figshare
Year: 2020
Subjects: subject: 159999 Commerce, Management, Tourism and Services not elsewhere classified
subject: FOS: Economics and business
subject: 150306 Industrial Relations

description: This research paper conducts an analysis of the China-Pakistan Economic Corridor, scheduled to cost an estimated US$60 Billion. In particular, the paper examines Chinese motivations for investment in Pakistan, the benefits of the corridor to Pakistan, the specific impact on the economy of Pakistan of projects under this scheme; and the global and domestic threats that may hamper its realisation. The paper begins by introducing the essential themes of the CPEC, before undertaking an overview of the relevant research literature. The methodical approach adopted in the course of the study is examined, and the paper’s findings are presented and discussed. Finally, the research paper develops a set of conclusions and recommendations, which will be crucial to the successful development of the projects and to maximising the socio-economic possibilities and potential of the corridor.
A carefully characterised trans-neptunian survey
Creators: name: Alexandersen, Mike
Publisher: name: University of British Columbia
Year: 2015

description: The Trans-Neptunian objects (TNOs) preserve evidence of planet building processes in their orbital and size distributions. While all populations show steep size distributions for large objects, recently a relative deficit of Neptunian Trojans and scattering objects with diameters D<100 km was detected. We have investigated this deficit with a 32 square degree survey, in which we detected 77 TNOs brighter than a limiting r-band magnitude of 24.6. Our Plutino sample (18 objects in 3:2 mean motion resonance with Neptune) also shows a deficit of D<100 km objects. We reject a single power-law size distribution at >99% confidence. The fact that three independent samples of three different populations show this trend suggests that it is a real feature, possibly shared by all hot TNO populations as a remnant of ''born big'' planetesimal formation processes. We surmise the existence of 9000 ± 3000 Plutinos with absolute magnitude Hr ≤ 8.66 and estimate 37000 +12000/-10000 Plutinos with Hr ≤ 10.0 (95% confidence ranges). Our survey also discovered one temporary Uranian Trojan, one temporary Neptunian Trojan and one stable Neptunian Trojan. With these discoveries, combined with our survey characteristics, we derive populations of 110 +500/-100, 210 +900/-200 and 150 +600/-140 for these populations, respectively, with Hr ≤ 10.0. With such approximately equal numbers, the temporary Neptunian Trojans cannot be previously stable Trojans that happen to be escaping the resonance now; they must be captured from another reservoir. Our population estimate also reveals that the Neptunian Trojans are less numerous than the main belt asteroids (semi-major axis 2.06<a<3.65), which has 592 asteroids with Hr ≤ 10.0. As the bias against detection of objects grows with larger semi-major axis, our discovery of three 3:1 resonators and one 4:1 resonator adds to the growing evidence that the high-order resonances are far more populated than can currently be explained theoretically.
The origin of the density scaling exponent for polyatomic molecules and the estimation of its value from the liquid structure
Creators: name: Kaskosz, Filip
name: Koperwas, Kajetan
name: Grzybowski, Andrzej
name: Paluch, Marian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this article, we unravel the problem of interpreting the density scaling exponent for the polyatomic molecules representing the real van der Waals liquids. Our studies show that the density scaling exponent is a weighted average of the exponents of the repulsive terms of all interatomic interactions occurring between molecules, wherein the potential energy of a given interaction represents its weight. It implies that potential energy is a key quantity required to calculate the density scaling exponent value for real molecules. Finally, we use the well-known method for potential energy estimation and show that the density scaling exponent could be successfully predicted from the liquid structure for fair representatives of the real systems.
Locally Perturbed Random Walks with Unbounded Jumps
Creators: name: Paulin, Daniel
name: Szász, Domokos
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G50, 60J65

description: In \cite{SzT}, D. Szász and A. Telcs have shown that for the diffusively scaled, simple symmetric random walk, weak convergence to the Brownian motion holds even in the case of local impurities if $d \ge 2$. The extension of their result to finite range random walks is straightforward. Here, however, we are interested in the situation when the random walk has unbounded range. Concretely we generalize the statement of \cite{SzT} to unbounded random walks whose jump distribution belongs to the domain of attraction of the normal law. We do this first: for diffusively scaled random walks on $\mathbf Z^d$ $(d \ge 2)$ having finite variance; and second: for random walks with distribution belonging to the non-normal domain of attraction of the normal law. This result can be applied to random walks with tail behavior analogous to that of the infinite horizon Lorentz-process; these, in particular, have infinite variance, and convergence to Brownian motion holds with the superdiffusive $\sqrt{n \log n}$ scaling.
description: 16 pages
Emerging farmer movements and alternative land access initiatives in British Columbia, Canada
Creators: name: Dennis, Jessica Elizabeth
Publisher: name: University of British Columbia
Year: 2015

description: In British Columbia (BC), Canada, the number of young farm operators is declining while the average age of farm operators is at a historic high. A rising population, urbanization and natural resource and industrial development in BC continue to place pressure on the province’s limited agricultural land base. BC also has the most expensive farmland in Canada, driven by the valuation of farmland for non-agricultural uses. It is predicted that there will be a significant transfer of farmland in the coming decades; how the land will be transferred and to whom is of fundamental concern to the trajectory of agriculture in this province. In response to farmland access challenges, young and beginning farmer networks and alternative land access initiatives have emerged in BC. In this thesis I explore these emerging young and beginning farmer and land access initiatives through the lens of the agrarian question and food sovereignty. This research was part of a collaborative community-based project and employed a survey and ethnographic methods. I argue that there is an emerging movement of young and beginning farmers in BC entering agriculture from non-farming backgrounds seeking to redress the impacts of the corporate food regime through the practice of locally oriented, ecological farming. Narratives employed by new farmer movements share discursive commonalities with the theory of repeasantization and food sovereignty movements. I provide a characterization of the diversity of alternative land access models practiced by farmers in BC and the motivations for their establishment. My analysis of these models suggests that the potential for furthering community-led land reform efforts in BC is inhibited by the high cost of land, tenure insecurity, societal attitudes favouring individual ownership, and high transaction costs. There is a need for an attitudinal and policy shift towards the management of farmland as a public good rather than a market commodity in order to support new farmer establishment, community-based land management, and the continuity of locally oriented agriculture. I conclude with policy recommendations to support new farm entrants and farmland access in British Columbia.
Seismic behaviour and nonlinear modeling of reinforced concrete flat slab-column connections
Creators: name: AlHarras, Omar
Publisher: name: University of British Columbia
Year: 2015

description: The contemporary structural design practice of tall buildings typically incorporates a lateral force resisting system, along with a gravity system that often includes reinforced concrete flat slabs. A major challenge with the design of this system is ensuring adequate strength and deformation capacities of the flat slab-column connections, especially when the structure is prone to strong seismic excitations. When a flat slab-column connection is subjected to a combination of gravity and lateral loads, failure may occur in multiple modes. Comprehensive literature reviews of the experimental studies and the analytical models related to reinforced concrete flat slabs, and flat slab-column connections are presented in Chapters 2 and 3, respectively. The existing nonlinear models that are currently available in literature were developed as assessment tools for old flat-plate structures. Thus, they are not capable of capturing the hysteretic behaviour of ductile flat slab-column connections with shear reinforcement. In Chapter 4, a new nonlinear model for flat slab-column connections is proposed. Utilizing the proposed model allows detecting potential failures due to all the possible modes of failure. The model was verified and calibrated using data from actual experimental studies. Chapter 5 investigates the effects of flat slabs on the global seismic response of typical high-rise concrete shear wall buildings. Two analytical case studies were conducted using a prototype building designed in Vancouver, Canada. The results from nonlinear dynamic analyses confirmed that including flat slabs in the analysis models of tall buildings is important to obtain accurate estimates of the structural responses and seismic demands. A concise summary of the research outcomes is presented in Chapter 6.
A new class of gamma-ray bursts from stellar disruptions by intermediate mass black holes
Creators: name: Gao, H.
name: Lu, Y.
name: Zhang, S. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It has been argued that the long gamma-ray burst (GRB) of GRB 060614 without an associated supernova (SN) has challenged the current classification and fuel model for long GRBs, and thus a tidal disruption model has been proposed to account for such an event. Since it is difficult to detect SNe for long GRBs at high redshift, the absence of an SN association cannot be regarded as the solid criterion for a new classification of long GRBs similar to GRB 060614, called GRB 060614-type bursts. Fortunately, we now know that there is an obvious periodic substructure observed in the prompt light curve of GRB 060614. We thus use such periodic substructure as a potential criterion to categorize some long GRBs into a new class of bursts, which might have been fueled by an intermediate-mass black hole (IMBH) gulping a star, rather than a massive star collapsing to form a black hole. Therefore, the second criterion to recognize for this new class of bursts is whether they fit the tidal disruption model. From a total of 328 Swift GRBs with accurately measured durations and without SN association, we find 25 GRBs satisfying the criteria for GRB 060614-type bursts: seven of them are with known redshifts and 18 with unknown redshifts. These new bursts are ~6% of the total Swift GRBs, which are clustered into two subclasses: Type I and Type II with considerably different viscous parameters of accretion disks formed by tidally disrupting their different progenitor stars. We suggest that the two different kinds of progenitors are solar-type stars and white dwarfs: the progenitors for four Type I bursts with viscous parameter of around 0.1 are solar-type stars, and the progenitors for 21 Type II bursts with viscous parameter of around 0.3 are white dwarfs. The potential applications of this new class of GRBs as cosmic standard candles are discussed briefly
description: 25 pages,8 figures
The orbital and physical properties of five southern Be+sdO binary systems
Creators: name: Wang, Luqian
name: Gies, Douglas R.
name: Peters, Geraldine J.
name: Han, Zhanwen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Close binary interactions may play a critical role in the formation of the rapidly rotating Be stars. Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope to form a hot and faint helium star. FUV spectroscopy has led to the detection of about 20 such binary Be+sdO systems. Here we report on a three-year program of high quality spectroscopy designed to determine the orbital periods and physical properties of five Be binary systems. These binaries are long orbital period systems with $P =$ 95 to 237 days and with small semi-amplitude $K_1<11$ km s$^{-1}$. We combined the Be star velocities with prior sdO measurements to obtain mass ratios. A Doppler tomography algorithm shows the presence of the He II $λ4686$ line in the faint spectrum of the hot companion in four of the targets. We discuss the observed line variability and show evidence of phased-locked variations in the emission profiles of HD 157832, suggesting a possible disk spiral density wave due to the presence of the companion star. The stripped companions in HD 113120 and HD 137387 may have a mass larger than the 1.4 $M_\odot$ indicating that they could be progenitors of Type Ib and Ic supernovae.
description: 50 pages, 23 figures, 16 tables
Development of Jones matrix tomography for functional ophthalmic imaging
Creators: name: Ju, Myeong Jin
Publisher: name: University of British Columbia
Year: 2015

description: Optical coherence tomography (OCT) provides the axial profile of back-scattered light from biological tissues and enables non-invasive, three-dimensional structure imaging. Since the introduction of OCT technique, OCT has shown its powerful utility especially in the field of ophthalmology. However its capability is still limited to the structural investigation. Because many eye diseases are tightly associated with tissue functions such as blood circulation and tissue microstructure, development of functional OCT is important. Since the necessity of functional extension of OCT technique got more attention, Doppler OCT and polarization-sensitive OCT (PS-OCT) have been developed for blood flow and birefringence measurements, respectively, and have been widely utilized for ophthalmic imaging for clinical and pathological research purposes. Jones-matrix-based OCT, also named as Jones matrix tomography (JMT), was originally designed as one type of PS-OCTs capable of measuring the polarization properties of biological tissue. In this dissertation, an advance version of JMT system is developed and also novel applications of JMT in ophthalmology is introduced. New JMT algorithms are developed, which make JMT system being capable of multi-contrast imaging including scattering, localized flow, and polarization contrasts. Novel spectral shift compensation and adaptive averaging methods are devised for achieving sensitivity-enhanced scattering OCT and polarization property measurements. Especially, by stabilizing the phase of the system, Doppler flow measurement is achieved with a high sensitivity. As a new clinical application, JMT is utilized for three-dimensional volumetric in vivo imaging of human eyelid. With the degree of polarization uniformity contrast (DOPU), one of the polarization contrasts produced by JMT, meibomian glands (MGs) are exclusively segmented from OCT volumetric image. With MG segmentation, its age-dependent morphological characteristics are further investigated. As another clinical application, JMT is also utilized for investigating corneal collagen cross-linking (CXL) effect on cornea stroma. Fresh bovine corneas are treated by two different CXL protocols (standard and accelerated CXL) and measured ex vivo. Morphological changes on the cornea after the two different protocols are cross-examined to evaluate their treatment outcomes in terms of the cross-linking effectiveness and progression. Through this study, JMT is shown to have great potential to monitor and diagnose many different ocular diseases non-invasively.
Dead and deader : the treatment of the corpse in latin imperial epic poetry
Creators: name: McClellan, Andrew Michael
Publisher: name: University of British Columbia
Year: 2015

description: This dissertation examines the maltreatment of dead bodies in the epic poems of Lucan (Bellum Ciuile), Statius (Thebaid), and Silius Italicus (Punica). I focus on the depiction of corpses, their varied functions in each epic, and the literary engagement these authors have with the treatment of corpses in epics past, particularly Homer’s Iliad and Virgil’s Aeneid. I demonstrate the ingenuity with which these poets deploy corpses in their works by emphasizing the interplay and intertextuality between these authors, how they strive to be different from their epic predecessors and each other through their skillful elaborations on a major epic motif. The two main categories of maltreatment I analyze include the physical abuse directed at an enemy corpse and, similarly, the withholding or perversion of burial rites. In my Introduction I identify a major gap in scholarship concerning the treatment of corpses in Roman Imperial epic that my dissertation aims to fill. My project begins from a number of studies on corpse treatment in the Iliad, and my desire to provide a similar analysis of this theme for the Roman epics. Chapter 2 sets a baseline for epic corpse treatment by looking in detail at the Iliad and Aeneid, with the intention of establishing a normative framework which proves valuable for highlighting deviations from the norm in the treatment of corpses in Imperial epic. Chapter 3 analyzes decapitation in Lucan, Statius, and Silius, scenes which directly target and exploit less explicit constructions in Homer and Virgil. Chapter 4 looks at the wide array of burial perversions and abuses in Lucan, with a focus on Pompey’s fragmented burial rites. Chapters 5 and 6 analyze burial perversions in Statius and Silius, respectively, structured around Creon’s burial denial edict in the Thebaid and Hannibal’s warped funerals for Roman generals in the Punica. A brief Conclusion summarizes my findings, and looks ahead to further research on this topic. My project shows that encapsulated in the corpses and their treatment, these epics reveal a deep concern with violence, horror, life, and death, that reflects the larger disturbed functioning of each poet’s epic universe.
Hearts and Minds: the Propaganda War Over the British Nuclear Deterrent, 1957 – 1963
Creators: name: Cohen, Philip
Publisher: name: UH Research Archive
Year: 2020
Subjects: Propaganda
Nuclear
Deterrent
Macmillan
CND
Media
Newspapers
Television
Film
Cold
Secrecy

description: The main subject of this thesis is Britain’s independent nuclear deterrent between the years 1957 and 1963 and the propaganda surrounding it. The thesis examines both the promotion of the nuclear deterrent by the Conservative governments led by Harold Macmillan in this time period, and the presentation of the case from the main opposition movement in this field, the Campaign for Nuclear Disarmament (CND). Three research questions are posed which add new thinking, using primary archive material to illustrate the arguments. First, what was the significance of the role of Charles Hill as the government’s information co-ordinator? The thesis focuses on how Hill introduced a professional approach to government propaganda management and communicated the case for the nuclear deterrent to the press, public, academics and scientists. Second, how did the changing media and communications environment of the period shape the propaganda war, such as the emergence of television as the most popular mass medium? The BBC faced twin challenges from commercial television, and its own broadcasters wanting to scrutinise government policies such as the deterrent. Newspapers with huge circulations, which largely supported the nuclear deterrent, experienced commercial pressures to entertain which influenced their choice of what was newsworthy. Third, what were the challenges to CND in making its case, both from a hostile media and internal weaknesses? CND harnessed the talents of radical designers to make a powerful appeal for public sympathy on moral grounds, and successfully discredited the official case for civil nuclear defence. But it never resolved an internal debate about how to gain media attention. The thesis situates its argument in the ‘cultural turn’ that has recently developed in British Cold War historiography, namely the emphasis on the impact of the Cold War on the everyday lives of citizens, as opposed to a previous focus on high-level strategic and diplomatic policy. The thesis also analyses for the first time how documentary film was produced by CND and the government as an important propaganda tool. The research shows how secrecy and denying a platform to alternative views was a feature of the official handling of nuclear deterrent policy. Two case studies, on Civil Defence and the Cuban Missile Crisis of 1962, examine the effectiveness of propaganda strategies in this debate.
Supersymmetric Index from Black Hole Entropy
Creators: name: Dabholkar, Atish
name: Gomes, Joao
name: Murthy, Sameer
name: Sen, Ashoke
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For BPS black holes with at least four unbroken supercharges, we describe how the macroscopic entropy can be used to compute an appropriate index, which can be then compared with the same index computed in the microscopic description. We obtain exact results incorporating all higher order quantum corrections in the limit when only one of the charges, representing momentum along an internal direction, approaches infinity keeping all other charges fixed at arbitrary finite values. In this limit, we find that the microscopic index is controlled by certain anomaly coefficients whereas the macroscopic index is controlled by the coefficients of certain Chern-Simons terms in the effective action. The equality between the macroscopic and the microscopic index then follows as a consequence of anomaly inflow. In contrast, the absolute degeneracy does not have any such simple expression in terms of the anomaly coefficients or coefficients of Chern-Simons terms. We apply our analysis to several examples of spinning black holes in five dimensions and non-spinning black holes in four dimensions to compute the index exactly in the limit when only one of the charges becomes large, and find perfect agreement with the result of exact microscopic counting. Our analysis resolves a puzzle involving M5-branes wrapped on a 5-cycle in K3 x T^3.
description: LaTeX file, 68 pages
Children's pre-existing perceptions of ADHD behaviours predict their sociometrics given to peers with ADHD
Creators: name: Na, Jennifer Jiwon
Publisher: name: University of British Columbia
Year: 2015

description: Children with ADHD show severe impairment in their peer relationships (Hoza, 2007; Whalen & Henker, 1992). Investigations of why children with ADHD experience difficulties in their peer relationships have nearly exclusively focused on the characteristics of children with ADHD that contribute to social rejection by their peers. Meanwhile, the contributions that the peers make to the social impairment of children with ADHD have not been explored. This study examined children’s pre-existing perceptions of ADHD as a potential contribution of the peer group to the impairment of peer relationships in children with ADHD. Participants were 137 children (male = 66; ADHD diagnosis = 24; 6-9 years) who were unacquainted prior to the study and participated in a 2-week summer camp. At the start of the camp, children read about a hypothetical child with ADHD and were asked to rate their inclination to like the hypothetical child, attribution of uncontrollability for ADHD behaviours, and inclination to help the hypothetical child. On the last day of the camp, their sociometrics (“like”, “dislike”, friend nominations and liking ratings) given to previously unacquainted, real- life classmates with ADHD were measured. Results showed that children have pre-existing attitudes and beliefs about children with ADHD that predict their nominations and ratings given to new, previously unacquainted peers with ADHD. Findings shed light to why peer relationships for children with ADHD may remain impaired even after receiving medication or behavioural treatment for ADHD symptoms—as these treatments do not attempt to alter the pre-existing beliefs and attitudes held by peers toward children with ADHD. Clinical implications and future directions are discussed.
Klein tunneling through an oblique barrier in graphene ribbons
Creators: name: Oh, J. H.
name: Ahn, D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a transmission coefficient of graphene nanoribbons with a top gate which acts as an oblique barrier. Using a Green function method based on the Dirac-like equation, scattering among transverse modes due to the oblique barrier is taken into account numerically. In contrast to the 2-dimensional graphene sheet, we find that the pattern of transmission in graphene ribbons depends strongly on the electronic structure in the region of the barrier. Consequently, irregular structures in the transmission coefficient are predicted while perfect transmission is still calculated in the case of metallic graphene independently of angle and length of the oblique barrier.
Some Inequalities for Nilpotent Multipliers of Powerful $p$-Groups
Creators: name: Mashayekhy, Behrooz
name: Mohammadzadeh, Fahimeh
Publisher: name: arXiv
Year: 2010
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20C25, 20D15, 20E10, 20F12

description: In this paper we present some inequalities for the order, the exponent, and the number of generators of the c-nilpotent multiplier (the Baer invariant with respect to the variety of nilpotent groups of class at most $c \geq 1$) of a powerful p-group. Our results extend some of Lubotzky and Mann$^{,}$s (Journal of Algebra, 105 (1987), 484-505.) to nilpotent multipliers. Also, we give some explicit examples showing the tightness of our results and improvement some of the previous inequalities.
description: 14 pages
Characterization of the breakup channel in the asymmetric systems $^{40,48}$Ca+$^{12}$C at 25 and 40 MeV/nucleon
Creators: name: Piantelli, S.
name: Casini, G.
name: Ottanelli, P.
name: Baldesi, L.
name: Barlini, S.
name: Borderie, B.
name: Bougault, R.
name: Camaiani, A.
name: Chbihi, A.
name: Ciampi, C.
name: Duenas, J. A.
name: Fabris, D.
name: Fable, Q.
name: Frankland, J. D.
name: Frosin, C.
name: Gramegna, F.
name: Gruyer, D.
name: Hong, B.
name: Kordyasz, A.
name: Kozik, T.
name: Kweon, M. J.
name: Lemarie', J.
name: LeNeindre, N.
name: Lombardo, I.
name: Lopez, O.
name: Marchi, T.
name: Mazurek, K.
name: Nam, S. H.
name: Parlog, M.
name: Park, J.
name: Pasquali, G.
name: Poggi, G.
name: Rebillard-Soulie', A.
name: Stefanini, A. A.
name: Upadhyaya, S.
name: Valdre', S.
name: Verde, G.
name: Vient, E.
name: Vigilante, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: An analysis of the asymmetric reactions $^{40,48}$Ca+$^{12}$C at 25 and 40 MeV/nucleon is presented. Data have been collected with six modules of the FAZIA array. The analysis is focused on the breakup channel of sources produced in dissipative collisions, partially corresponding to incomplete fusion processes. The study has been performed both on detected fragments and on some resonances reconstructed by means of particle-fragment correlations, with a focus on the evolution of the breakup channel with the beam energy and the neutron content of the system, looking in particular at the relative velocity between the breakup fragments. Results show that also Carbon fragments reconstructed by means of particle correlations can be in large part interpreted as the light partner of a scission.