cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stop production in Spanish-English bilingual children
Creators: name: Schnider, Raina
Publisher: name: Arts
Year: 2022
Subjects: subject: child language acquisition
subject: phonetics
subject: phonology
subject: acoustic analysis
subject: bilingual
subject: English
subject: Spanish
subject: language input
subject: language attitudes
subject: sociolinguistics
subject: Speech Communication
subject: Education--Bilingual and Multicultural
subject: Education--Early Childhood
subject: Linguistics
subject: FOS: Languages and literature

description: Stop sounds (i.e., [p, t, k, b, d, g]) are relatively early sounds in children’s acquisition and have specific features that can be measured and compared crosslinguistically. Spanish voiceless stops have shorter voice onset time values than English voiceless stops, and Spanish voiced stops vary allophonically to approximants, a process that does not occur in English. Because previous child bilingual language acquisition studies on these sounds have provided dissonant findings (e.g., Macken & Barton, 1978, 1980; Fabiano-Smith et al., 2015), this thesis investigates the phonetic productions of one child who has been exposed to Spanish and English from birth and examines the role of family language practices. The case study data were collected from one Spanish-English bilingual family (child aged 5;3; mother; father). Participants completed a picture naming task and narrative task in both languages. The mother also completed a language survey to gauge the language use and attitudes in the home. The quantitative and qualitative data were analyzed for correlations between the production task results and language input and attitudes. The findings reveal that the child’s Spanish voiceless and voiced productions were within her parents’ production ranges and within monolingual norms, and that her English voiceless stop production differs from her parents’ and falls within the English monolingual range as set out in previous literature, while the child’s English voiced stop acquisition may still be underway. These results provide evidence that her two languages are differentiated. This research adds to the literature on bilingual child language development and aims to improve our understanding of bilingual development to inform families and decision makers.
Overcoming the Local Trap Through Inclusive and Multi-Scalar Food Systems: A Case Study of EthniCity Catering in Calgary, Alberta
Creators: name: Landon, Abby
Publisher: name: Arts
Year: 2022
Subjects: subject: Local food
subject: Scale theory
subject: Cultural diversity
subject: Local trap
subject: Defensive localism
subject: Inclusive
subject: Multi-scalar
subject: Qualification
subject: Anthropology--Cultural
subject: Geography
subject: Ethnic and Racial Studies
subject: Food Science and Technology
subject: Engineering--Environmental

description: Current industrialized food systems have detrimental consequences for people and the planet. Relocalizing food systems offers one strategy to mitigate these harms; advocates point to opportunities for ecological, economic, and social benefits as reason to localize food production. However, the assumption that the local is inherently preferable to the global can lead academics, practitioners, and consumers into the local trap. With increasing ethnic diversity in Canada, the perception that local is inherently good and global is inherently bad can translate into defensive and exclusionary tendencies towards the food preferences and practices of those considered ‘non-local’, such as immigrants. While the literature identifies various manifestations of the local trap, it offers limited investigation of strategies that may overcome this pitfall. In contrast to defensive localism, alternative conceptualizations of scale may support action in favour of collaborative, inclusive, and diversity-receptive outcomes in food systems. Therefore, in this thesis, I aim to identify strategies that may include the food preferences and practices of newcomers while also addressing problematic aspects of industrial food systems. I also seek to understand the mechanisms and conceptualizations that enable such strategies. To accomplish this, 1) I completed a literature analysis to synthesize potential strategies and models and 2) empirically explored food practices and goals of the EthniCity Catering program (Centre for Newcomers) in Calgary, Alberta to illustrate the potential application of such strategies in a specific time and place. This thesis hopes to offer theoretical contributions to geographical discussions on scale in food systems as well as practical implications for food system practitioners.
OSVH Co-Design Toolbox for Village Hosts
Creators: name: Menichinelli, Massimo
name: De Spirito, Denise
name: Nieva, Elena Elizondo
name: Paz, Iván
Publisher: name: Zenodo
Year: 2023
Subjects: co-design
toolbox
social innovation

description: OSVH Co-Design Toolbox for Village Hosts
 Designed by Massimo Menichinelli, Denise de Spirito, Elena Elizondo Nieva, Iván Paz.
 v1.5
 04/2023 from the Open School for Village Hosts
 Project ID 2021-1-IT01-KA220-VET-000034855
 https://www.villagehosts.eu/ Based on: Menichinelli, Massimo, Priscilla Ferronato, Diana Pamela Villa Alvarez, and Marion Real. “SISCODE Toolbox for Co-Creation Journeys.” SISCODE, 2019. https://siscodeproject.eu/wp-content/uploads/2019/09/toolkit-27092019-1.pdf.
Zeta function regularization in Casimir effect calculations and J.S. Dowker's contribution
Creators: name: Elizalde, Emilio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A summary of relevant contributions, ordered in time, to the subject of operator zeta functions and their application to physical issues is provided. The description ends with the seminal contributions of Stephen Hawking and Stuart Dowker and collaborators, considered by many authors as the actual starting point of the introduction of zeta function regularization methods in theoretical physics, in particular, for quantum vacuum fluctuation and Casimir effect calculations. After recalling a number of the strengths of this powerful and elegant method, some of its limitations are discussed. Finally, recent results of the so called operator regularization procedure are presented.
description: 16 pages, dedicated to J.S. Dowker, version to appear in International Journal of Modern Physics A
Quasideterministic realization of a universal quantum gate in a single scattering process
Creators: name: Ciccarello, F.
name: Browne, D. E.
name: Kwek, L. C.
name: Schomerus, H.
name: Zarcone, M.
name: Bose, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that a flying particle, such as an electron or a photon, scattering along a one-dimensional waveguide from a pair of static spin-1/2 centers, such as quantum dots, can implement a CZ gate (universal for quantum computation) between them. This occurs quasi-deterministically in a single scattering event, hence with no need for any post-selection or iteration, {and} without demanding the flying particle to bear any internal spin. We show that an easily matched hard-wall boundary condition along with the elastic nature of the process are key to such performances.
description: 7 pages, 3 figures (including Suppl. Mater.)
Le pilier européen des droits sociaux: véritable dimension sociale de l'UEM ou simple poudre de perlimpinpin?. Revue ECU/EURO, N°53 (2018)
Creators: name: Navasartian Havani, Areg
Publisher: name: RESuME
Year: 2019

description: En novembre 2017, le nouveau Socle européen des droits sociaux a été proclamé conjointement par les institutions européennes et les Etats membres. Cet ensemble politique de 20 principes sociaux doit guider l'UE vers une Union plus juste et plus solidaire. La nécessité d'un tel pilier est toutefois apparue après qu'il est devenu évident que sauver la zone euro de la crise financière s'est fait au détriment des droits sociaux. Les conséquences ont été profondes et ont participé à une crise de légitimité importante, qui a récemment culminé avec le Brexit.Dans cet article, nous ferons un rappel sur la place accordée à la politique sociale et aux droits sociaux dans le cadre de l'UEM, avant de retracer l’historique et d’analyser le contenu et la forme du Socle. Nous tenterons de dresser une image complète des progrès réalisés dans ce contexte, mais aussi des défauts et faiblesses que le Socle présente.
Multimoment Radio Transient Detection
Creators: name: Spitler, Laura
name: Cordes, Jim
name: Chatterjee, Shami
name: Stone, Julia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a multimoment technique for signal classification and apply it to the detection of fast radio transients in incoherently dedispersed data. Specifically, we define a spectral modulation index in terms of the fractional variation in intensity across a spectrum. A signal whose intensity is distributed evenly across the entire band has a much lower modulation index than a spectrum with the same intensity localized in a single channel. We are interested in broadband pulses and use the modulation index to excise narrowband radio frequency interference (RFI) by applying a modulation index threshold above which candidate events are removed. The technique is tested both with simulations and using data from sources of known radio pulses (RRAT J1928+15 and giant pulses from the Crab pulsar). We find that our technique is effective at eliminating not only narrowband RFI but also spurious signals from bright, real pulses that are dedispersed at incorrect dispersion measures. The method is generalized to coherent dedispersion, image cubes, and astrophysical narrowband signals that are steady in time. We suggest that the modulation index, along with other statistics using higher-order moments, should be incorporated into signal detection pipelines to characterize and classify signals.
description: Version 2, 13 pages, 7 figures, accepted to Astrophysical Journal
Illuminating the Role of Opsin Proteins in Circadian Rhythm Regulation
Creators: name: Debnath, Nilakshi
Publisher: name: Cumming School of Medicine
Year: 2022
Subjects: subject: circadian rhythms
subject: opsin
subject: Neuroscience

description: Circadian rhythms allow organisms from bacteria to humans to entrain with the environmental light: dark cycle and regulate their physiological, metabolic, and behavioral activities. The rhythms are regulated by the oscillations of four core circadian genes: Period, Cryptochrome, BMAL1 and CLOCK. These rhythms synchronize to the light: dark cycle of the environment. Detecting light is necessary not only for vision but also for the proper synchronization of circadian rhythms. Opsins are proteins that detect light and are primarily expressed in the retina for visual light detection. Studies have demonstrated that opsins synchronize the circadian rhythms of an organism; however if opsins show rhythmic expression is still being studied. Furthermore, opsins are expressed in the skin where their function is poorly understood. Some of the current treatments for circadian rhythm disorders are light exposure based. Better understanding of the regulation of light-detecting proteins will aid in the development of more effective treatment. I focus on how mRNAs and proteins for opsins in the skin are regulated over 24 hours. Specifically, I studied opsin regulation in pigmented cells of the skin known as melanocytes (mammals) and melanophores (non-mammalian vertebrates). These cells exhibit dynamic pigmentation responses to environmental light and dark. Using Xenopus laevis as a model organism, I analyzed the expression of 22 opsin genes previously identified in this species in the skin by RT-PCR. Highly expressed in melanophores were: opn5 (a neuropsin), and the two melanopsin homologues opn4 and opn4b, as well as the four core clock genes. In-situ hybridization studies showed opn5 mRNA to be expressed in a punctate manner similar to the distribution of the melanosomes (organelles containing melanin pigment), suggesting a particular intracellular distribution of the mRNA. Protein distribution of the opsins, determined by immunohistochemistry, shows a similar pattern, suggesting specific localized expression of Opn5. Preliminary data suggest that while opn4b mRNA is regulated in a circadian manner, protein expression remains relatively constant. Whereas both the mRNA and protein of Opn5 show changes over time. My results indicate that at least two opsins are expressed in a cyclic manner in the pigmented skin cells.
A walker in the city
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 1951

description: The acclaimed story of a soul awakening to the ecstasy of the senses, the power of language, and the meaning of existence. Kazin's memorable description of his life as a young man as he makes the journey from Brooklyn to "Americanca"--The larger world that begins at the other end of the subway in Manhattan. A classic portrayal of the Jewish immigrant culture of the 1930s
Kayak-specific Motion Constraints for an Improved Android Smartphone GPS/INS Navigation Solution
Creators: name: Harke, Kelly
Publisher: name: Schulich School of Engineering
Year: 2022
Subjects: subject: Smartphone positioning, GPS, inertial navigation, GPS/INS, motion constraints, kayaking
subject: Education--Technology
subject: Engineering
subject: Engineering--Electronics and Electrical

description: In this thesis, a Global Positioning System (GPS) / inertial navigation system (INS) smartphone navigation solution to track a kayak accurately and continuously down a river is developed, implemented, and tested. A Google Pixel 4 was used to log raw GPS, accelerometer, and gyroscope measurements. Four field datasets were collected with commercial grade GNSS receivers for a reference solution and the smartphone fixed to the deck of a kayak. Traditional closed loop loosely and tightly coupled GPS/INS algorithms were compared. Both implementations were found to perform similarly with complete satellite coverage and both degraded rapidly in the event of a GPS outage. GPS signal outages may frequently occur on a river due to vegetation, canyon walls, and water splashing over the receiver and the solution becomes reliant on the INS alone. Low-cost inertial sensors, such as those found in a smartphone, were incapable of providing an accurate solution for a long period of time during GPS outages due to the accumulation of sensor errors. To minimize this INS error, the motion of a kayak was analyzed and constraints exclusive to kayaking were proposed to improve the solution. These kayak-specific motion constraints estimated the gyroscope bias, pitch and roll angles, and accelerometer bias based on the assumption that the kayak’s pitch and roll angles are centered around zero, cyclic in nature, and return to the same orientation at regular time intervals. These motion constraints were applied to the collected datasets in a loosely coupled filter to verify this solution. The velocity and position errors during a GPS outage were improved with motion constraints as opposed to a traditional filter without motion constraints. After a simulated 20 second GPS outage on one dataset, the horizontal and vertical errors improved from 31.077 to 12.538 metres and 8.874 to 1.342 metres respectively with the motion constraints applied. This improvement was verified with three additional datasets. Therefore, the proposed kayak-specific motion constraints were found to improve the GPS/INS navigation solution, particularly during a GPS outage.
An efficient external sorting algorithm for flash memory embedded devices
Creators: name: Cossentine, Tyler Andrew
Publisher: name: University of British Columbia
Year: 2012

description: Many embedded systems applications involve storing and querying large datasets. Existing research in this area has focused on adapting and applying conventional database algorithms to embedded devices. Algorithms designed for processing queries on embedded devices must be able to execute given the small amount of available memory and energy constraints. Sorting is a fundamental algorithm used frequently in databases. Flash memory has unique performance characteristics. Page writes to flash memory are much more expensive than reads. In addition, random reads from flash memory can be performed at nearly the same speed as sequential reads. External sorting can be optimized for flash memory embedded devices by favoring page reads over writes. This thesis describes the Flash MinSort algorithm that, given little memory, takes advantage of fast random reads and generates an index at runtime to sort a dataset. The algorithm adapts its performance to the memory available and performs best for data that is temporally clustered. Experimental results show that Flash MinSort is two to ten times faster than previous approaches for small memory sizes where external merge sort is not executable.
“I’m Doing Okay”: Strengths and Resilience of Children with and without ADHD
Creators: name: Charabin, Emma
Publisher: name: Werklund School of Education
Year: 2022
Subjects: subject: Attention-Deficit/Hyperactivity Disorder
subject: Strengths
subject: Resilience
subject: Children
subject: Educational Psychology
subject: Psychology
subject: FOS: Psychology

description: Research on attention-deficit/hyperactivity disorder (ADHD) has typically focused on deficits or the areas in which those with ADHD perform poorly. Nevertheless, the body of research directed at understanding the strengths and resilience of this population is growing. Seligman and Csikszentmihalyi (2000) propositioned that psychology needs to move towards understanding more about positive characteristics and how people are successful. Research focusing on ADHD has indicated strengths for individuals with ADHD in the areas of creativity, energy, and adventurousness (Halthe & Langvik, 2017; Ten et al., 2020). As well, resilience research focusing on ADHD has also found many protective and promotive factors that are important for promoting good outcomes (Dvorsky & Langberg, 2016). Continuing in the pursuit of positive psychology, this study aims to investigate positive qualities by examining the strengths and resilience of children with and without ADHD. The final sample included 56 children between the ages of 10 and 17 years (ADHD: n = 38; without ADHD: n = 18). Children in both the ADHD and without ADHD groups tended to report average levels of strengths and resilience with the exception of school functioning. Significant differences were found between groups for school functioning only. As hypothesized, significant correlations between strengths and resilience for both groups were found, indicating there is a significant positive relationship between self-reported strengths and resilience. Only family involvement was not significantly correlated with resilience for the without ADHD group. Results from this study emphasize the importance of taking a strength-based perspective when working with children diagnosed with ADHD.
Parents' Self-Stigma, Youth Self-Stigma, and Youth Self-Esteem in ADHD Families
Creators: name: Jelinkova, Kristina
Publisher: name: Werklund School of Education
Year: 2022
Subjects: subject: ADHD
subject: self-stigma
subject: self-esteem
subject: parents
subject: youth
subject: children
subject: adolescents
subject: internalized stigma
subject: Educational Psychology
subject: Mental Health
subject: Psychology--Social

description: Research shows that youth with attention-deficit/hyperactivity disorder (ADHD) and their parents are subject to stigma from the general population (Bisset et al., 2012; Charbonnier et al., 2019; Shi et al., 2019). Exposure to stigma from the general population poses the risk of individuals internalizing that stigma in what is known as “self-stigma” (Corrigan & Rao, 2012). Self-stigma in youth with various mental illnesses and their parents is associated with various negative outcomes, such as reduced self-esteem and poor mental health in both youth and parents (Corrigan et al., 2016; Eaton et al., 2020; Kaushik et al., 2017; Trigueros et al., 2022). However, little is known about the experiences of self-stigma in ADHD; therefore, this study sought to explore self-stigma in youth with ADHD and their parents in relation to each other and to self-esteem and ADHD symptoms in youth. The final sample included 52 children between the ages of eight and 17 years (males: n = 33; females: n = 19) and their parents. The study found that youth with ADHD reported lower scores of self-stigma compared to previous studies using samples with more severe conditions. Furthermore, self-stigma in youth was not related to age or gender. Parents also reported lower ratings of self-stigma compared to previous studies; however, there was a significant relationship with gender where parents of boys reported higher self-stigma scores compared to parents of girls. When looking at the factors that predict self-stigma in youth, contrary to the hypothesis, parents’ self-stigma did not predict youth self-stigma but inattentive symptoms did. Finally, higher self-stigma in youth predicted lower self-esteem, as hypothesized. The results of this study emphasize the need for self-stigma interventions for youth with ADHD and their parents and the need understand symptom severity in self-stigma research.
Hercules in the Garden: Gender, Affect, and Impact at the Villa d’Este in Tivoli
Creators: name: Eveleigh, Cassandra
Publisher: name: Arts
Year: 2022
Subjects: subject: Hercules
subject: Tivoli
subject: Ippolito d'Este
subject: Gardens
subject: Renaissance
subject: Ippolito d'Este's Villa d'Este
subject: Italy
subject: The Villa d'Este
subject: Herculean statues
subject: Hercules in a garden
subject: Gender
subject: Gender performance
subject: Gender theory
subject: Affect
subject: Affect theory
subject: Reception studies
subject: Renaissance gardens
subject: Cardinal Ippolito d'Este
subject: Art History
subject: Language--Ancient
subject: Economics--History
subject: Economics--Theory
subject: Gender Studies

description: Cardinal Ippolito II d’Este’s (1509-1572) display of Hercules statues in the gardens of his Villa d’Este presents a visual and affective form of gender performance and gender roles. However, this display of gender differs from other estates in the Renaissance as freedoms and fluidity for audiences occur due to Ippolito’s relationship and views on society and life. Here men could embody elements of femininity. The visibility of sexual freedoms and tolerance is present through Ippolito’s embrace of Hercules in his fluid totality. These observations deviate from current scholarly analyses on the reception of Hercules by viewing him as an affective vessel that portrays gender and sexual liminality to visitors of the garden—increasing tolerance and expanding one's understanding of the relationship between virtue and vice. These liminal elements in the garden are visible through two principal Hercules statues, the Reclining Hercules and the Lionskin-clad Hercules. Using a case study approach allows for the examination of nuanced tolerances and freedoms through the theoretical lens of gender and affect theory. Here, the select appropriation of classical culture and mythology, chosen by Ippolito’s upbringing, education, personal propaganda, and artistic ideologies, showcases the gender and sexual mentalities from the past reshaped and transported to the Villa d’Este through art. Further, since Ippolito differed from his contemporaries due to his holdover of pre-Counter-Reformation mentalities (lavish opulence and power inherent to a “Cardinal Prince”), presents the foundation for his artistic expression in the Villa d’Este. This foundation showcases that Ippolito’s deviations from normative gender and sexual ideals were true to his character and complement his appreciation for classical antiquity. Additional to the Herculean statues, the garden provides the pivotal context for Hercules as a liminal hero as the garden is a liminal space—wherein gender and sexuality likewise gain a degree of liminality. The two second-century Herculean statues present an ideal example of how classical culture affected audiences and allowed the moods and emotions created by the garden to interject into guests' minds. In turn, the garden space privileged the wealthy elite to engage with morphed gender and sexual ideals presented by Ippolito.
Free Phase Gas in Shallow Groundwater
Creators: name: Morais, Tiago Antonio
Publisher: name: Science
Year: 2022
Subjects: subject: Free phase gas
subject: In-well mixing and degassing
subject: Dissolved gas
subject: Groundwater gas detection
subject: Water pressure
subject: Field Parameters
subject: Total dissolved gas pressure
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Hydrology
subject: Environmental Sciences

description: The unintended migration of natural gases and saline fluids from deep formations into shallow aquifers can increase the risk of explosion during groundwater extraction, induce biogeochemical changes in aquifers containing potable groundwater, and increase greenhouse gas emissions into the atmosphere. Hence, long-term monitoring of gases present in shallow aquifers is essential to evaluate the occurrence and the potential environmental impacts associated with the presence of fugitive natural gas migration. However, accurate sampling and monitoring of dissolved and free-phase gases (FPG) is particularly challenging in gas-charged groundwater wells. In addition, the fate of fugitive natural gases in shallow aquifers around oil and gas wells with gas migration is not yet fully understood. This thesis investigates the best approaches for accurate monitoring and sampling of dissolved gases and FPG in shallow aquifers. In addition, a multidisciplinary field investigation was conducted around an oil and gas well with integrity failure to investigate the key mechanisms that govern transport and attenuation of fugitive gases in the shallow groundwater zone. Monitoring of Total Dissolved Gas Pressure (PTDG) and dissolved gas concentrations in a 'gassy' groundwater well demonstrated that bubble exsolution (i.e., FPG formation), bubble-driven micro advection, and thermally driven convection are key mechanisms controlling degassing in gas-charged groundwater wells. In addition, laboratory experiments indicated that the combined measurement of water pressure, electrical conductivity, and PTDG can accurately identify the occurrence of FPG in groundwater wells under non-flowing and flowing conditions. Finally, high-resolution monitoring of fugitive gases and hydrogeological conditions in the shallow groundwater zone around an oil and gas well with gas migration demonstrated that the transport of fugitive gases at the study well is controlled by the presence of preferential pathways along the well casing, the distribution of lenses of unconsolidated sediments with higher silt and clay content, and the groundwater flow direction. Together, these findings provided insights into the key mechanisms controlling in-well degassing in gas-charged wells, the usage of water pressure and continuously measured field parameters to detect the occurrence of FPG in groundwater wells, and the transport of fugitive natural gases in shallow aquifers around 'leaky' oil and gas wells.
The signature of the first stars in atomic hydrogen at redshift 20
Creators: name: Visbal, Eli
name: Barkana, Rennan
name: Fialkov, Anastasia
name: Tseliakhovich, Dmitriy
name: Hirata, Christopher
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dark and baryonic matter moved at different velocities in the early Universe, which strongly suppressed star formation in some regions. This was estimated to imprint a large-scale fluctuation signal of about 2 mK in the 21-cm spectral line of atomic hydrogen associated with stars at a redshift of 20, although this estimate ignored the critical contribution of gas heating due to X-rays and major enhancements of the suppression. A large velocity difference reduces the abundance of halos and requires the first stars to form in halos of about a million solar masses, substantially greater than previously expected. Here we report a simulation of the distribution of the first stars at z=20 (cosmic age of ~180 Myr), incorporating all these ingredients within a 400 Mpc box. We find that the 21-cm signature of these stars is an enhanced (10 mK) fluctuation signal on the 100-Mpc scale, characterized by a flat power spectrum with prominent baryon acoustic oscillations. The required sensitivity to see this signal is achievable with an integration time of a thousand hours with an instrument like the Murchison Wide-field Array or the Low Frequency Array but designed to operate in the range of 50-100 MHz.
description: 27 pages, 5 figures, close (but not exact) match to accepted version. Basic results unchanged from first submitted version, but justification strengthened, title and abstract modified, and substantial Supplementary Material added. Originally first submitted for publication on Oct. 12, 2011
Elliptic hypergeometric integrals and 't Hooft anomaly matching conditions
Creators: name: Spiridonov, V. P.
name: Vartanov, G. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Elliptic hypergeometric integrals describe superconformal indices of 4d supersymmetric field theories. We show that all 't Hooft anomaly matching conditions for Seiberg dual theories can be derived from $SL(3,\mathbb{Z})$-modular transformation properties of the kernels of dual indices.
description: Latex, 18 pages, 1 eps figure. Version 2: a reference added, misprints corrected
A note on sub-Riemannian structures associated with complex Hopf fibrations
Creators: name: Li, Chengbo
name: Zhan, Huaying
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C17, 70G45, 49J15, 34C10

description: Sub-Riemannian structures on odd-dimensional spheres respecting the Hopf fibration naturally appear in quantum mechanics. We study the curvature maps for such a sub-Riemannian structure and express them using the Riemannian curvature tensor of the Fubini-Study metric of the complex projective space and the curvature form of the Hopf fibration. We also estimate the number of conjugate points of a sub-Riemannian extremal in terms of the bounds of the sectional curvature and the curvature form. It presents a typical example for the study of curvature maps and comparison theorms for a general corank 1 sub-Riemannian structure with symmetries done by C.Li and I.Zelenko.
description: 6 pages. arXiv admin note: substantial text overlap with arXiv:0908.4397
Disentangling correlated scatter in cluster mass measurements
Creators: name: Noh, Yookyung
name: Cohn, J. D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The challenge of obtaining galaxy cluster masses is increasingly being addressed by multiwavelength measurements. As scatters in measured cluster masses are often sourced by properties of or around the clusters themselves, correlations between mass scatters are frequent and can be significant, with consequences for errors on mass estimates obtained both directly and via stacking. Using a high resolution 250 Mpc/h side N-body simulation, combined with proxies for observational cluster mass measurements, we obtain mass scatter correlations and covariances for 243 individual clusters along ~96 lines of sight each, both separately and together. Many of these scatters are quite large and highly correlated. We use principal component analysis (PCA) to characterize scatter trends and variations between clusters. PCA identifies combinations of scatters, or variations more generally, which are uncorrelated or non-covariant. The PCA combination of mass measurement techniques which dominates the mass scatter is similar for many clusters, and this combination is often present in a large amount when viewing the cluster along its long axis. We also correlate cluster mass scatter, environmental and intrinsic properties, and use PCA to find shared trends between these. For example, if the average measured richness, velocity dispersion and Compton decrement mass for a cluster along many lines of sight are high relative to its true mass, in our simulation the cluster's mass measurement scatters around this average are also high, its sphericity is high, and its triaxiality is low. Our analysis is based upon estimated mass distributions for fixed true mass. Extensions to observational data would require further calibration from numerical simulations, tuned to specific observational survey selection functions and systematics.
description: 18 pages, 12 figures, final version to appear in MNRAS, helpful changes from referee and others incorporated
Comprehensive Analysis of Mitigating the Losses for Photovoltaic Panels to Enhance the Conversion Efficiency of Output Power
Creators: name: Basavaraj, Gokul
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 400808
subject: Photovoltaic power systems

description: In summary, energy consumption is increasing due to the increasing global population and depletion of fossil fuels. PV cells are seen as a promising source of renewable energy, but their efficiency can be hindered by various factors, including high costs and reduced efficiency in developing countries. To address these challenges, this research proposes contemporary and cost-effective MPPT and cooling systems to enhance PV panel efficiency. It suggests using ANN and PCMs for cooling to mitigate the negative impacts of high temperatures for conversion efficiency improvement of the PV panels’ output power. The integration of PCM cooling can optimise PV panel performance, increase energy output, and promote broader adoption of solar energy as a reliable renewable source. The proposed model has been demonstrated to enhance the conversion efficiency of PV cells by minimising thermal losses through simulations and analyses performed using MATLAB/Simulink software.
Ideas of Europe: The European Political Community in the Thought of Buffon and Montesquieu
Creators: name: Pfeifer, Zachary
Publisher: name: Arts
Year: 2022
Subjects: subject: Political Science
subject: FOS: Political science

description: In this thesis, I examine eighteenth-century accounts of the idea of Europe as a distinct political community. In exploring the idea of Europe, I question the ways that it has attempted to make sense of, and give meaning to, the world and a particular people's place within it. In pursuit of this questioning, I will look to the works of Buffon and Montesquieu, who each provide models of thinking about Europe as an ideal political community and as an exceptional political community respectively. I will show that both models articulate an idea of universal human flourishing belonging to the particular conditions, values and practices of the European political community and that this association generates tensions between the idea of Europe and Europe's place in the world. In my examination of each thinker's model of Europe, I show that the critical tension revealed is the dilemma of articulating an idea of community that generates meaningful ideas about human flourishing that is simultaneously rooted in particular conditions and circumstances. Concerned with how notions of identity shape political projects and understanding of 'others', I consider the implications of these models of Europe as a distinct political community in relation to this concern.
Towards opportunistic UAV relaying for smart cities
Creators: name: Hardes, Tobias
name: Boos, Clemens
name: Sommer, Christoph
Publisher: name: European Association of Software Science and Technology
Year: 2021

description: With recent advances in cooperation among mobile computer systems, Unmanned Aerial Vehicles (UAVs) can be expected to be operated in large numbers and become a part of daily life for a variety of use cases. UAVs are already envi- sioned to act as mobile base stations, e.g., for situations with high node densities and strong communication requirements. However, UAVs are typically imagined to be provided specifically for this purpose. In this work, we study the effects of exploiting randomly passing UAVs at an urban intersection for the communication between vehicles on the ground. We show that a UAV, while following its pri- mary mission, can support cooperative driving vehicles in a purely opportunistic fashion by collecting periodic wireless broadcasts from vehicles and propagating all collected information periodically in an aggregated format. Using simulations, we show that such an opportunistic UAV relaying approach can lead to an improvement of approx. 6 percentage points (% points) in terms of perception of other vehicles.
description: Electronic Communications of the EASST, Volume 80: Conference on Networked Systems 2021 (NetSys 2021)
The Kauffman polynomial and trivalent graphs
Creators: name: Caprau, Carmen
name: Tipton, James
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M27, 57M15

description: We construct a state model for the two-variable Kauffman polynomial using planar trivalent graphs. We also use this model to obtain a polynomial invariant for a certain type of trivalent graphs embedded in three-dimensional space.
description: 24 pages, many figures; typos corrected, Theorem 3 modified
Cat's Got Your Tongue - Anxiety and Foreign Language Acquisition
Creators: name: Desgrosseilliers, Patrick
Publisher: name: Werklund School of Education
Year: 2022
Subjects: subject: Anxiety, Language Learning, ESL
subject: Education--Bilingual and Multicultural

description: This study investigated the impact of Foreign Language Anxiety (FLA) on English language learning and performance. The project was fundamentally concerned with answering the following two research questions: How do English language students perceive anxiety to be affecting their learning and competency? and What are the factors/contexts that typically result in the manifestation of language related anxiety? In order to discern the impact of anxiety on English language learning and performance, this study viewed the problem through an interpretive lens, employed case study as a methodology and used semi structured interviews as the principal data collection instrument. In total, eight university students based in Mérida, Yucatán, México were individually interviewed about what triggered their anxiety and how they perceived it to be impacting their learning and performance in English. Results indicated that participants perceive anxiety to be a highly negative phenomenon with adverse consequences for English language learning and performance. In this thesis, performance is defined as how skillfully language is deployed while learning is defined as the development of the core abilities needed to function in a language. Data collected from the interview process revealed that the perceived anxiety is triggered by various teaching, learning and ideological variables and that it produces an aversive physiological state. The study’s findings suggest that researchers and practitioners within the field of language education ought to make a number of fundamental adjustments in order to maximize the language learning potential of the students they serve.
Measurement of soot with organic coatings by laser-induced incandescence
Creators: name: Tjong, Hugo Arri Runtukahu
Publisher: name: University of British Columbia
Year: 2012

description: Time-Resolved Laser-Induced Incandescence (TR-LII) uses a high-energy laser pulse to detect airborne soot particles. When a laser pulse encounters a light-absorbing particle, the energy will be absorbed, resulting in an increase in temperature. If the temperature is high enough, incandescence can be used to quantity of the soot mass (EC). TR-LII tracks the incandescent light as the particle cools, providing information on the particle structure. It is a common in LII research to assume that the soot aggregate particles contain only Elemental Carbon (EC) and if these soot aggregate particles are internally mixed with Organic Carbon (OC), the intense energy from the laser beam evaporates the OC instantly. Unfortunately, these assumptions are inaccurate because the existence of OC will alter the structure and heat transfer properties of the aggregate. The existence of OC also has an effect on the energy absorption by the soot particulates. An experiment was conducted using India ink particles as a soot surrogate and Oleyl Alcohol as a model OC coating. The experiment’s objective is to study the effect of coating (OC) on the LII detection. The coating increased the peak temperature, but the apparent primary particle diameter decreased when more coating was introduced, whereas the main output variable (volume fraction) showed a mixed response. Up until a thickness of 40 nm, the apparent volume fraction value was declining, but for a thicker coating condition, the value was increasing. Another experiment was conducted to study the effect of the coating on the particulate distribution downstream of the laser heating in the LII detecting chamber. The soot fragmentation phenomenon was found to occur in the LII system and the existence of coating has an effect on the soot fragmentation phenomenon. Compared to uncoated particle, which produces small fragments (<40 nm), a coated particle produces additional quantity of middle size fragments (60 to 100 nm) but fewer of small size fragments. Overall, the present project shows that the existence of the coating cannot be ignored for an LII system especially in a condition where heavy coating are expected and a high accuracy is needed.
Understanding Camouflaging and Identity in Autistic Children and Youth Using Photovoice
Creators: name: Howe, Stephanie
Publisher: name: Werklund School of Education
Year: 2022
Subjects: subject: autism spectrum disorder
subject: children
subject: adolescents
subject: youth
subject: camouflaging
subject: social masking
subject: Photovoice
subject: photo-elicitation
subject: qualitative research
subject: Educational Psychology
subject: Mental Health
subject: Psychology--Clinical
subject: Psychology--Developmental
subject: Psychology--Social

description: Background: While it is well-established that autistic children and adolescents are vulnerable to developing mental health concerns, it is unclear what factors cause and maintain these mental health issues. Camouflaging, or the use of strategies by autistic people to minimize the visibility of their autistic traits in social situations, may be a risk factor for mental health concerns among autistic adults. However, there is relatively little research describing camouflaging among autistic children and adolescents. The present study provided evidence of emerging camouflaging behaviour among autistic children and adolescents and supplied rich descriptions of this phenomenon from those with lived experience. Methods: Photo-elicitation was used to actively engage participants in the research process, and to assist them in sharing their thoughts through photography. Seven autistic children and adolescents aged 10 to 14 years (M = 11.57, SD = 1.81) were given two to three weeks to take photographs in response to the topic and prompts provided. Individual interviews were conducted with each participant. Thematic analysis was used to identify major themes within interview data and an interpretive engagement framework was used to interpret participant images. Results: Qualitative analysis identified 13 themes. Camouflaging was perceived by autistic children and adolescents to be a response to negative social experiences, as well as a learned habit that was often unconscious and difficult to stop. Context (e.g., the audience, the activity) was important for determining when children and adolescents would camouflage. While some autistic children and adolescents camouflaged by suppressing their natural behaviours in social situations, many camouflaged by generally hiding their true selves (e.g., their interests, emotions, and opinions) from others. Camouflaging behaviour was reported to result in internal conflict, stress, and a need for time alone to recharge. Conclusions: Results from this qualitative study highlight that autistic children and adolescent as young as ten years old engage in camouflaging behaviour that can be pervasive and automatic. Camouflaging was reported to be a stressful, confusing, and energetically draining experience for autistic children and adolescents. Better understanding of the development and experience of camouflaging in childhood can inform prevention of mental health concerns in adulthood.
Characterization of Embryonic Microglia in the Developing Hypothalamus of Germ-Free Mice
Creators: name: Malik, Faizan
Publisher: name: Cumming School of Medicine
Year: 2022
Subjects: subject: brain
subject: development
subject: gut microbiome
subject: germ-free
subject: microglia
subject: morphometrics
subject: fractal analysis
subject: embryonic brain development
subject: microglia morphology
subject: Neuroscience

description: Emerging evidence suggests that the maternal microbiome may influence the colonization, development, and function of microglia during embryonic brain development. Our objective was to conduct an unbiased and comprehensive morphometric evaluation of microglia morphology over several embryonic timepoints in the germ-free (GF) and specific pathogen free (SPF) tuberal hypothalamus. We hypothesized that hypothalamic microglia exhibit subtle differences in colonization, morphology, and/or dynamics in the embryonic brain of germ-free mice. This investigation was performed using two primary imaging modalities including histological, and acute organotypic slice time-series, imaging. Few morphological disturbances were observed between GF and SPF microglia across all embryonic timepoints analyzed. However, the changes we did observe, were robust and striking. GF microglia along the ventricular zone of the E14.5 tuberal hypothalamus exhibited several significant differences indicative of excess ramification. This finding was corroborated by the marked absence of an ameboid and highly phagocytic population of microglia in GF acute organotypic brain slices, otherwise present in the SPF condition. Furthermore, we observed a global decrease in CD68 expression among microglia in the tuberal hypothalamus. Interestingly, microglia in the parenchyma appeared unaffected by the absence of the microbiome. Together this data suggests that the maternal microbiome may discriminately influence discrete subpopulations of microglia in the tuberal hypothalamus at developmentally relevant time-points.