cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phase Behavior and Physical Properties of Athabasca Bitumen and Solvent Mixtures
Creators: name: Haddadnia, Ali
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Bitumen
subject: Solvent-aided thermal recovery
subject: Dimethyl ether
subject: Phase behaviour
subject: Thermal recovery
subject: Oil sands
subject: Methane
subject: Engineering--Chemical
subject: Engineering--Petroleum

description: Solvent-aided thermal recovery techniques are gaining prominence for extracting bitumen and heavy oils. These methods involve co-injecting saturated steam and solvent into bitumen reservoirs. The phase behaviour of solvent and bitumen is crucial in designing and optimizing any solvent-assisted in-situ bitumen recovery. This study investigates vapor-liquid equilibrium (VLE) between various solvents (including dimethyl ether DME, C1, C2, C3, C4, n- C5, C1/n-C5, C1/n-C6, C1/n-C7, and C1/ C3+n-C4+n-C5) and Athabasca bitumen. Parameters such as equilibrium compositions (K-values), liquid-phase density, and viscosity were measured at temperatures up to 260 °C and pressures up to 6 MPa. Methane's solubility in bitumen showed minor temperature dependence (200, 230, and 260 ºC), while ethane, propane, and n-butane exhibited more significant temperature effects. The study also compared co-injection of DME/steam to traditional steam and steam/butane injections in a 2D sand-pack saturated with Athabasca bitumen. Results indicated DME's efficacy in enhancing bitumen recovery, making DME and steam co-injection promising. Another focus was the impact of solution gas (methane) on K-values in solvent/live bitumen and solvent dead bitumen systems. In the first stage of experiments, K-values, density and viscosity for methane/bitumen, propane/bitumen, and n-pentane/bitumen were measured. In the next step, methane, pentane, and bitumen were mixed at two concentrations (one with high and the other with low GOR live bitumen). Then K-value, density and viscosity of methane/n-hexane/bitumen and methane/n-heptane/bitumen system were measured. In the final stage of experimental data collection, K-values, density and viscosity of methane/propane, n-butane, and n-pentane/bitumen system were measured. The collected experimental PVT data of solvent and bitumen were modeled using PR-EoS, and experimental and calculated k-values of methane, propane, n-butane, n-pentane, n-hexane, and n-heptane data were compared for solvent/live bitumen and solvent dead bitumen system. Also, K-values of methane for methane /solvent(s) /bitumen and methane/bitumen systems were compared to study the effect of methane on the K-values of other hydrocarbon solvents. The results show the variation of methane and n-pentane K-values between various systems are within the experimental error, which means for the modeling and reservoir simulation purposes, we can use the K-values for any of these systems.
Effect of Light Fermions on the Confinement Transition in QCD-like Theories
Creators: name: Liao, Jinfeng
name: Shuryak, Edward
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Dependence of the confinement transition parameters on the fermion content provides information on the mechanism of confinement. Recent progress in lattice gauge theories has allowed to study it for light flavor number $N_f\sim O(10)$ and found this transition to shift toward significantly stronger coupling. We propose an explanation for that: light fermions can occupy the chromo-magnetic monopoles, via zero modes, making them "distinguishable" and unsuitable for Bose-Einstein Condensation. Such dilution of unoccuplied monopoles is compensated by stronger coupling that makes them lighter and more numerous. We also suggest that flavor-carrying quark-monopole objects account for the density beyond quark Fermi sphere seen in cold dense phase of $N_c=2$ lattice QCD.
description: 4 pages, 1 figure; few references added; close to the final published version
Nematronics: Reciprocal coupling between ionic currents and nematic dynamics
Creators: name: Dao, Chau
name: Everts, Jeffrey C.
name: Ravnik, Miha
name: Tserkovnyak, Yaroslav
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Adopting a spintronics-inspired approach, we study the reciprocal coupling between ionic charge currents and nematic texture dynamics in a uniaxial nematic electrolyte. Assuming quenched fluid dynamics, we develop equations of motion analogously to spin torque and spin pumping. Based on the principle of least dissipation of energy, we derive the adiabatic "nematic torque" exerted by ionic currents on the nematic director field as well as the reciprocal motive force on ions due to the orientational dynamics of the director. We discuss several simple examples that illustrate the potential functionality of this coupling. Furthermore, using our phenomenological framework, we propose a practical means to extract the coupling strength through impedance measurements on a nematic cell. Exploring further applications based on this physics could foster the development of nematronics -- nematic iontronics.
description: 13 pages including the supplemental material, 3 figures, Physical Review Letters
The HI absorption distance of HESS J1943+213 favours its extragalactic nature
Creators: name: leahy, Denis
name: Tian, Wenwu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The H.E.S.S. collaboration (Abramowski et al. 2011) dicovered a new TeV point-like source HESS J1943+213 in the Galactic plane and suggested three possible low-energy-band counterparts: a $γ$-ray binary, a pulsar wind nebula (PWN), or a BL Lacertae object. We measure the distance to the radio counterpart G57.76-1.29 of HESS J1943+213. We analyze Very Large Array observations to obtain a reliable HI absorption spectrum.The resulting distance limit is $\ge$ 16 kpc. This distance strongly supports that HESS J1943+213 is an extragalactic source, consistent with the preferred counterpart of the HESS collaboration.
description: 3 figures, 2 pages, A&A accepted
Ultra-Wideband Trained Artificial Neural Networks for Bluetooth Proximity Detection in Small Crowded Areas
Creators: name: Debnath, Satinath
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Bluetooth
subject: Ultra-wideband
subject: Proximity
subject: Engineering

description: Estimating the distance between indoor users is increasingly important in unexpected ways. One specific example is the need for electronic contact tracing demonstrated during the recent global pandemic. Smartphones are now routinely equipped with Bluetooth Low Energy radios, among other sensors, and these can be used for proximity detection based on received signal strength that is subject to errors due to poor modelling of the indoor propagation environment. Some high-end smartphones have now also been equipped with ultra-wideband ranging radios that provide a much more precise range measurement. This thesis demonstrates the concept of using a limited number of UWB-equipped smartphones to gather data to train Artificial Neural Networks (ANN) to improve short-range distance estimation among Bluetooth users. The trained RSSI to range model can be used for proximity determination by other Bluetooth users in small, crowded areas. Two ANN algorithms were trained using RSSI measurements from three BLE advertising channels and UWB range as ground truth and training data. The initial training and testing were conducted in a semi-empty office laboratory with 2130 observations. The RF model used 1917 samples (90% of data) for training and 213 samples (10%) for testing, while the CNN method used 1704 samples (80% of data) for training and 426 samples (20%) for evaluation. The trained neural network models were tested in two other office environments under different user conditions. The results indicate that the ANN models can estimate proximity in a new environment without further training with a mean error of less than 1.2 metres, within a range of up to 6 metres at line-of-sight (LOS). In highly constrained non-line-of-sight (NLOS) areas in the first office room, the proposed models provided proximity accuracy better than 2.9 metres. Furthermore, during testing across two adjacent office environments, each containing a single BLE device with complex furniture arrangements, the ANN models showed the proximity between the BLE devices with an error of less than 2-3 metres.
Prime numbers, quantum field theory and the Goldbach conjecture
Creators: name: Sanchis-Lozano, Miguel-Angel
name: G., J. Fernando Barbero
name: Navarro-Salas, Jose
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Motivated by the Goldbach conjecture in Number Theory and the abelian bosonization mechanism on a cylindrical two-dimensional spacetime we study the reconstruction of a real scalar field as a product of two real fermion (so-called \textit{prime}) fields whose Fourier expansion exclusively contains prime modes. We undertake the canonical quantization of such prime fields and construct the corresponding Fock space by introducing creation operators $b_{p}^†$ --labeled by prime numbers $p$-- acting on the vacuum. The analysis of our model, based on the standard rules of quantum field theory and the assumption of the Riemann hypothesis, allow us to prove that the theory is not renormalizable. We also comment on the potential consequences of this result concerning the validity or breakdown of the Goldbach conjecture for large integer numbers.
description: 20 pages in A4 format, 2 figures
Sleep Disturbances and Impairments in High School Sport Participants at Baseline and Following a Sport-Related Concussion
Creators: name: McCallum, Jocelyn Haley
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Concussion
subject: Sleep Disturbance
subject: Sleep-Related Impairment
subject: Adolescents
subject: Sport-Related Concussion
subject: Epidemiology
subject: Recreation

description: Introduction: Approximately one in five youth sustain at least one sport-related concussion by the time they complete high school. There are limited studies examining the association between the Patient-Reported Outcomes Measurement Information System (PROMIS) pediatric sleep questionnaires and common demographic and medical variables, including the Sport Concussion Assessment Tool 5 (SCAT5). How sleep changes throughout recovery has not yet been examined using the PROMIS sleep questionnaires. Objectives: 1) Describe PROMIS sleep questionnaire t-scores at baseline in a sample of adolescent sport participants, and to examine the association and interactions of age, sex, number of previous concussions, depression, anxiety, attention-deficit hyperactivity disorder (ADHD), and the SCAT5 symptom severity score on PROMIS Pediatric Sleep Disturbance and Sleep-Related Impairment scores. 2) Describe sleep disturbances and impairments using the PROMIS sleep questionnaires and the SCAT5 sleep-related symptom evaluation in the baseline, acute, and return-to-play (RTP) timepoints following concussion among male and female adolescent sport participants. Methods: Cross-sectional and prospective cohort designs. Participants completed the PROMIS questionnaires and SCAT5 at baseline. Adolescents who sustained a concussion completed the SCAT5 and PROMIS questionnaires acutely and completed the PROMIS questionnaires bi-weekly until RTP. Descriptive statistics illustrated sleep disturbances and impairments at baseline, acutely, and at RTP. For baseline t-scores, mean effects of covariates and their interactions were examined using random intercept regression models and likelihood ratio tests. Results: At baseline, 26% to 29% of males and 43% to 50% of females had mild to severe sleep disturbances or impairments. Furthermore, higher PROMIS scores were associated with being female, being an older adolescent, and the SCAT5 symptom severity score. Significantly higher sleep disturbance scores were observed in those with anxiety, and lower sleep-related impairment scores were observed in those with ADHD at baseline. In the acute phase of concussion, 38% to 44% of males and 37% to 48% of females had sleep disturbance and impairment scores within the mild to severe ranges. Conclusion: There are many factors influencing sleep in healthy adolescent sport participants. A high proportion of males and females had sleep disturbance and impairment scores over the ‘normal’ range at baseline and acutely following a concussion.
Attentional and cognitive consequences of migraine visual cortical hyperexcitability
Creators: name: Mickleborough, Marla Joy Sanderson
Publisher: name: University of British Columbia
Year: 2012

description: People with migraine have hyperexcitable visual cortical response to normal visual inputs between attacks. Given that our attentional and perceptual processing can be influenced by our sensory experience, we might expect migraine visual cortical hyperexcitability to have a forward cascade of effects on cognitive processing. With this in mind, this dissertation explored the functional consequences of migraine hyperexcitable visual cortices on attentional and cognitive processing between headache attacks. To begin with, given that top-down attentional control signals can affect excitability of sensory response in visual cortex, Chapter 2 assessed if this normal modulation is affected in migraineurs. Using a probabilistic spatial orienting task while measuring ERPs to attended vs. unattended foveal and parafoveal stimuli, Chapter 2 revealed that migraineurs manifest heightened sensory responses of to-be-ignored visual stimuli. Next, Chapter 3 examined the behavioral impact of hyperexcitability of migraine visual cortex in terms of its effect on bottom-up attentional processing, in this case reflexive attentional orienting. Using three behavioral spatial attention paradigms, this chapter provided evidence of heightened reflexive visual-spatial orienting specific to sudden-onset peripheral events. Lastly, Chapter 4 assessed post-spatial-selection consequences of visual cortical hyperexcitability in migraineurs. Participants viewed unfamiliar commercial logos in the context of a target identification task while brain responses were recorded via ERPs. Following this task, participants individually identified those logos that they most liked or disliked. The results of this chapter suggested that migraineurs were not only evaluating environmental stimuli more than controls over time, but also not adequately hedonically categorizing it for quick allocation of attention. Collectively, the research presented in this dissertation suggests that migraineurs have anomalies specifically pointing to increased allocation of attention to extraneous environmental stimuli. The final concluding chapter briefly recaps each research chapter and then critically examines the impact of these findings in the context of four outstanding questions exposed by this research. Specifically, are top-down attentional control signals in migraineurs intact? How might anomalies found in this dissertation be a result of or independent from known sensory cortical abnormalities? How do the findings fit with the migraineur experience? Finally, what are the real-world clinical implications for migraineurs?
Numerical stochastic inflation constrained by frozen noise
Creators: name: Tomberg, Eemeli
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Stochastic inflation can resolve strong inflationary perturbations, which seed primordial black holes. I present a fast and accurate way to compute these perturbations in typical black hole producing single-field models, treating the short-wavelength Fourier modes beyond the de Sitter approximation. The squeezing and freezing of the modes reduces the problem to one dimension, and the resulting new form of the stochastic equations, dubbed `constrained stochastic inflation,' can be solved efficiently with semi-analytical techniques and numerical importance sampling. In an example case, the perturbation distribution is resolved in seconds deep into its non-Gaussian tail, a speed-up of factor $10^9$ compared to a previous study. Along the way, I comment on the role of the momentum constraint in stochastic inflation.
description: 34 pages, 8 figures, 1 table. v2: Minor revisions in text. Published version
Engineering a broadly cross-protective vaccine against Haemophilus influenzae using transferrin binding proteins
Creators: name: Ewasechko, Nikolas Frederik
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Vaccines
subject: Transferrin binding proteins
subject: Haemophilus influenzae
subject: Protein engineering
subject: Mouse infection models
subject: Immunoassays
subject: Microbiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Haemophilus influenzae is a Gram-negative bacterium that can cause otitis media, respiratory tract infections, and invasive disease. H. influenzae can be classified into two groups: strains with a polysaccharide capsule and strains without a capsule, or “nontypeable” H. influenzae (NTHi). While a vaccine targeting H. influenzae serotype b (Hib) exists and is highly effective, this vaccine has no effect on other encapsulated serotypes or NTHi. Hence, H. influenzae remains a significant health problem worldwide. The overall objective of this thesis was to address this problem by developing a vaccine that would elicit protection against all H. influenzae strains, regardless of capsule type or presence of capsule. To accomplish this, the iron acquisition protein transferrin binding protein B (TbpB), which helps to bind and remove iron from the host glycoprotein transferrin, was targeted. TbpB is an attractive vaccine candidate as it has been found to be essential for bacterial survival and pathogenesis in the host. In addition, since TbpB is present in both encapsulated H. influenzae and NTHi, a TbpB-based vaccine has the potential to confer protection against both groups. Our group has previously shown that engineered TbpBs and TbpB subdomains can elicit broadly cross-reactive antiserum and prevent bacterial infections by strains expressing heterologous TbpB variants. Phylogenetic and immunological analyses have also suggested that a vaccine containing representative variants from each phylogenetic cluster can provide comprehensive protection. Hence, in this thesis, I evaluate the hypothesis that a strategically engineered TbpB-based vaccine can confer protection against infection by both encapsulated H. influenzae and NTHi strains using two distinct vaccine design strategies – one in which a set of representative TbpBs was selected for inclusion in a multivalent vaccine and another involving the use of a single conserved TbpB subdomain. The antigens produced using these two strategies were then compared for their ability to elicit a cross-reactive antibody response and to confer protection against invasive challenge with H. influenzae. Overall, the results presented herein provide support for the use of conserved TbpB subdomains for eliciting broad protection and highlight important considerations for establishing animal infection models for evaluating vaccines.
Multiple spreaders affect the indirect influence on Twitter
Creators: name: Shuai, Xin
name: Ding, Ying
name: Busemeyer, Jerome
Publisher: name: arXiv
Year: 2012
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: J.4; H.1.2

description: Most studies on social influence have focused on direct influence, while another interesting question can be raised as whether indirect influence exists between two users who're not directly connected in the network and what affects such influence. In addition, the theory of \emph{complex contagion} tells us that more spreaders will enhance the indirect influence between two users. Our observation of intensity of indirect influence, propagated by $n$ parallel spreaders and quantified by retweeting probability on Twitter, shows that complex contagion is validated globally but is violated locally. In other words, the retweeting probability increases non-monotonically with some local drops.
description: 2 pages, 2 figures; www2012 poster
Hadronic decays of the heavy-quark-spin molecular partner of $T_{cc}^+$
Creators: name: Jia, Zhao-Sai
name: Yan, Mao-Jun
name: Zhang, Zhen-Hua
name: Shi, Pan-Pan
name: Li, Gang
name: Guo, Feng-Kun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Starting from the hypothesis that the $T_{cc}^+$ discovered at LHCb is a $D^{\ast+} D^0/D^{\ast 0}D^+$ hadronic molecule, we consider the partial width of its heavy quark spin partner, the $T_{cc}^{\ast +}$ as a $D^{\ast +} D^{\ast 0}$ shallow bound state, decaying into the $D^{\ast}Dπ$ final states including the contributions of the $D^{\ast} D$ and $D^{\ast} π$ final state interaction by using a nonrelativistic effective field theory. Because of the existence of the $T_{cc}^+$ pole, the $I=0$ $D^{\ast} D$ rescattering can give a sizeable correction up to about $40\%$ to the decay widths considering only the tree diagrams, and the $D^{\ast} π$ rescattering correction is about $10\%$. The four-body partial widths of the $T_{cc}^{*+}$ into $D Dππ$ are also explicitly calculated, and we find that the interference effect between different intermediate $D^*Dπ$ states is small. The total width of the $T_{cc}^{*+}$ is predicted to be about 41 keV.
description: 31 pages, 10 figues. Results updated and extended, version to be published in Phys. Rev. D
Interplay of superconductivity and localization near a 2D ferromagnetic quantum critical point
Creators: name: Nosov, P. A.
name: Burmistrov, I. S.
name: Raghu, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the superconducting instability of a two-dimensional disordered Fermi liquid weakly coupled to the soft fluctuations associated with proximity to an Ising-ferromagnetic quantum critical point. We derive interaction-induced corrections to the Usadel equation governing the superconducting gap function, and show that diffusion and localization effects drastically modify the interplay between fermionic incoherence and strong pairing interactions. In particular, we obtain the phase diagram, and demonstrate that: (i) there is an intermediate range of disorder strength where superconductivity is enhanced, eventually followed by a tendency towards the superconductor-insulator transition at stronger disorder; and (ii) diffusive particle-particle modes (so-called `Cooperons') acquire anomalous dynamical scaling $z=4$, indicating strong non-Fermi liquid behavior.
description: 14 pages, 3 figures
Black rings with fourth dipole cause less hair loss
Creators: name: Chowdhury, Borun D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An example of entropy enigma with a controlled CFT dual was recently studied in arXiv:1108.0411. The enigmatic bulk configurations, considered within the STU model, can be mapped under spectral flow into black rings with three monopole and dipole charges. Even though the bulk and CFT configurations existed in the same region of parameter space, the Bekenstein-Hawking entropy of the bulk configurations was found to be lower than the microscopic entropy from the CFT. While it is possible that the difference in entropy is due to the bulk and boundary configurations being at different points in the moduli space, it is also possible that the bulk configurations embeddable within the STU model are not the most entropic. New families of BPS black ring solutions with four electric and four dipole magnetic charges have recently been explicitly constructed in arXiv:1201.2585. These black rings are not embeddable within the STU model. In this paper we investigate if these black rings can be entropically dominant over the STU model black rings. We find that the new black rings are always entropically subdominant to the STU-model black rings. However, for small fourth dipole charge these black rings continue to be dominant over the BMPV in a small region of parameters and are thus enigmatic.
description: v2: minor changes, references added, 15 pages, 9 figures (published version)
title: A Comparative Study of the Origins and Development of Municipal Housing in Liverpool and Newcastle, c.1835-1914
Creators: name: Dockerill, Bertie
Publisher: name: University of Liverpool Repository
Year: 2024

description: A longitudinal study anchored in deep archival research, this comparative work focuses upon the origins and development of municipal social housing in two of England’s most significant provincial urban centres, Newcastle and Liverpool, between c.1835 and 1914. This period tends to be overlooked within existent studies upon the history of British council housing, and where it is addressed, the spatial focus is usually overtly London-centric. With reference to both of these issues, therefore, this work contributes to addressing gaps within existent literature. The two Corporations of Liverpool and Newcastle were extreme counterpoints in terms of their mid-late nineteenth-century approaches to managing urban sanitation and health; the policy areas from which the local authority provision of working-class council housing emerged. Where Liverpool was (repeatedly) globally pioneering, Newcastle was far more laggardly in its approach to direct involvement in realms that, traditionally, were seen to be the preserve of the private sector. The study advocates that knowledge of local political contexts and culture is imperative to understanding the divergent policy-paths and records of individual authorities – especially in a period of robust corporate-civic individualism. In its analysis of the same, the work relies heavily upon the interrogation of archival sources at both local and national levels. Through so doing it challenges a range of existing academic interpretations whilst also offering fresh insights and new data. Whilst primacy is given to the analysis of local political contexts and individual policy debates (as well as the roles of specific individuals) in the development of the policies pursued by the two Corporations, local policies were also influenced by broader, national-level, developments. As this study details, the restructuring of local government alongside the passing of the 1890 Housing of the Working Classes Act fundamentally altered the ability of local authorities to demolish slums and construct working-class housing. Concurrent developments in the then protean discipline of town planning (such as the Garden City/Suburb movements), as well as heightened societal and central government expectations as to the style of accommodation in which the working classes should ideally be housed, and the rise of labour (issues and party) as an electoral force all further altered the parameters of debates pertaining to the municipal provision of working-class homes. Analysing the impact of these, and other, factors upon the nature, style, and location of the working-class (re)housing schemes constructed in Liverpool and Newcastle in the immediate pre-war period, the study concludes by considering the housing-challenges faced by the two cities’ authorities on the eve of the First World War.
Can my Intelligence Grow? A Comparative Study of Mindset Theory and Achievement Goals in Children with Attention-Deficit/Hyperactivity Disorder
Creators: name: Siemens, Theresa Elisabeth
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Mindset Theory
subject: ADHD
subject: Achievement Motivation
subject: Growth Mindset
subject: Achievement Goals
subject: Educational Psychology

description: Mindset theory explores the impact of implicit intelligence beliefs on achievement motivation. According to this theory, students who adopt a growth mindset by recognizing the malleability of intelligence are more academically resilient and strive for mastery in their learning. In contrast, students with a fixed mindset perceive intelligence as unchangeable, leading them to prioritize performance goals and respond less adaptively to challenges. While previous studies have extensively explored mindsets in typically developing (TD) students, the present study extends these research efforts to children with attention-deficit/hyperactivity disorder (ADHD). A sample of 53 children with ADHD and 26 TD counterparts, along with their respective parents, were recruited for the study. Participants completed the Implicit Theory of Intelligence Scales (Castella & Byrne, 2015; Dweck, 1999) and the revised Achievement Goal Questionnaire (Elliot & McGregor, 2001). The research questions compared the mindsets and achievement goals of children with ADHD to their peers, as well as explored the relationship between mindsets and achievement goals predicted by mindset theory. The study also examined the relationship between parents' and children's mindsets. Results showed that about two-thirds of children, regardless of ADHD, had a growth mindset. However, the relationships between mindsets and achievement goals, as proposed by the theory, could not be replicated. Children with ADHD displayed a complex motivational profile, pursuing both mastery and performance goals in their learning. Furthermore, there was no significant association between parents’ mindsets and those of their children. These findings suggest that students with ADHD generally believe in their potential to grow and develop. The study discusses the implications of these findings for both home and school settings.
A group-theoretic approach to the origin of chirality-induced spin selectivity in non-magnetic molecular junctions
Creators: name: Dednam, W.
name: García-Blázquez, M. A.
name: Zotti, Linda A.
name: Lombardi, E. B.
name: Sabater, C.
name: Pakdel, S.
name: Palacios, J. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Spin-orbit coupling gives rise to a range of spin-charge interconversion phenomena in non-magnetic systems where certain spatial symmetries are reduced or absent. Chirality-induced spin selectivity (CISS), a term that generically refers to a spin-dependent electron transfer in non-magnetic chiral systems, is one such case, appearing in a variety of seemingly unrelated situations ranging from inorganic materials to molecular devices. In particular, the origin of CISS in molecular junctions is a matter of an intense current debate. Here we derive a set of geometrical conditions for this effect to appear, hinting at the fundamental role of symmetries beyond otherwise relevant quantitative issues. Our approach, which draws on the use of point-group symmetries within the scattering formalism for transport, shows that electrode symmetries are as important as those of the molecule when it comes to the emergence of a spin-polarization and, by extension, to the possible appearance of CISS. It turns out that standalone metallic nanocontacts can exhibit spin-polarization when relative rotations which reduce the symmetry are introduced. As a corollary, molecular junctions with $\textbf{achiral}$ molecules can also exhibit spin-polarization along the direction of transport, provided that the whole junction is chiral in a specific way. This formalism also allows the prediction of qualitative changes of the spin-polarization upon substitution of a chiral molecule in the junction with its enantiomeric partner. Quantum transport calculations based on density functional theory corroborate all of our predictions and provide further quantitative insight within the single-particle framework.
description: 34 pages, 4 figures, 1 table
Guided Software Library Selection
Creators: name: Tanzil, Minaoar Hossain
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Software Library
subject: Software Library Selection Model
subject: Software Library Selection Tool
subject: Sentiment Analysis
subject: Contrastive Learning
subject: Noise Augmentation
subject: ChatGPT
subject: ChatGPT Correctness
subject: Stack Overflow
subject: Grounded Theory
subject: Mapping Study
subject: Engineering--Electronics and Electrical

description: Selection of an appropriate reusable software library is a non-trivial task. Developers spend hours every day browsing information online for gathering knowledge on technology and libraries. Though there are a few studies on qualifying factors of software libraries, a comprehensive study on the library selection process for developing a library selection too is still missing. Moreover, there are limitations of existing techniques that summarize library-related opinions for developers. This thesis aims to guide development teams for software library selection by providing them with specific recommendations and by developing foundational technical components that can be integrated into library selection tools. Following Straussian grounded theory, we interviewed 24 industry professionals for the library selection process. We conducted a mapping study with 384 Stack Overflow (SO) based software engineering (SE) research papers to understand the state-of-the-art techniques used around SO which is the most common source of library-related opinions for developers. We implemented a novel noise-augmentation approach on a contrastive learning-based deep learning model that can significantly improve library-related sentiment detection from the SO posts. Finally, we conducted an online survey with 135 industry practitioners to know the usage of large-language model (LLM) based chatbots and implemented an interactive prompting technique to detect chatbot incorrectness which was a major concern raised by the practitioners. We developed a theoretical framework of the library adoption model showing that while facing 7 barriers under 23 different conditions, developers follow 6 decision patterns to consider 28 factors in the 5-step library adoption process. Besides proposing seven recommendations for improving library selection efficiency, we also conceptualized a library selection tool COMPINER. Our noise-aware contrastive learning base technique, CLAN, outperformed all SOTA models by 2% in eight benchmarks and by up to 27% in online noisy data. The chatbot incorrectness detection tool CID can detect the correctness of the chatbot responses with 0.74-0.75 f1-score. The mapping study on SO produced a catalog of ten SE research themes for 384 papers. The results of the rigorously data-driven empirical studies and the tool implementations can support both industry practitioners and SE researchers in the library selection process and tools.
Supplementary document for Physics-model-based neural networks for inverse design of binary phase planar diffractive lens - 6273905.pdf
Creators: name: He, Jianmin
name: Guo, Zhenghao
name: Zhang, Yongying
name: Lu, Yiyang
name: Wen, Feng
name: Da, Haixia
name: Zhou, Guofu
name: Yuan, Dong
name: Ye, Huapeng
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental materials
The Role of Colonial Ideologies in Mediation: Racialized Young Learners’ Sense-making during Collective Reading of Science and Mathematics Picture Books
Creators: name: Wang, Xiao
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: science and mathematics picture book reading
subject: mediation
subject: ideologies-in-piece
subject: Asian students
subject: education equity
subject: identity
subject: coloniality
subject: Education--Early Childhood
subject: Education--Mathematics
subject: Education--Sciences

description: While picture books and read-aloud activities are recognized as tools for fostering disciplinary sense-making among young learners, little attention has been paid to the implicit influences of geopolitical colonial power (Mignolo, 2009) and settler colonialism (Bang et al., 2014; Marin et al., 2020) during such interactions. This study draws on sociocultural theory of mediation (Vygotsky, 1978; see also Cole, 1996; Esmonde, 2016) and the conceptual framing of ideologies-in-pieces (Philip, 2011) to examine the dynamic mediation and construction of the geopolitical colonial matrix of power and identity in early science and mathematics learning (Takeuchi, 2021) from the perspective of critical sociocultural theory. Employing critical and decolonial interaction analysis (Marin, 2020; Philip & Gupta, 2020) and critical discourse analysis (Fairclough, 2003), this study examines how young students (primarily Asian children) and a teacher understand science and mathematics concepts by responding to the taken-for-granted pieces of colonial ideologies inscribed in picture books in a Canadian kindergarten classroom. Findings reveal how racialized children perpetuate, subtly disrupt, and negotiate colonial ideologies circulated in/through collective reading activities. The study contributes to understanding the role of colonial ideologies in mediation, and questions the assumed neutrality of young learners’ disciplinary learning through classroom-based science and mathematics picture books reading activities, toward equity in early learning.
The envelope theory as a pedagogical tool
Creators: name: Semay, Claude
name: Balcaen, Maud
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The envelope theory is a reliable and easy to implement method to solve time independent Schrödinger-like equations (eigenvalues and eigenvectors). It is particularly useful to solve many-body systems since the computational cost is independent from the number of particles. The purpose of this paper is twofold. First, we want to make known a method that is probably too little used. Second, we also want to show that this method can be used as a pedagogical tool, thanks to its simplicity and the reliable results that can be obtained. To reach these goals, the envelope theory is applied to a simple problem in one dimension, the soft-Coulomb potential $-k/\sqrt{x^2+d^2}$, characterised by a bias distance $d$. Such interaction is used for the study of excitons, electron-hole bound pairs where the two charges are kept separated in two different one-dimensional regions (quantum wires). In addition to its physical interest, this system has never been treated with the envelope theory.
description: https://notebookarchive.org/the-envelope-theory-as-a-pedagogical-tool--2023-03-97cajed/
Application of Scientific Machine Learning Methods in Epidemical Modeling: Undetected COVID-19 Population Ratio Prediction
Creators: name: Liu, Xinyang
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Epidemical Modeling
subject: Universal Differential Equations
subject: Deep Learning
subject: Data-driven Methods
subject: Education--Mathematics

description: Combining deep learning techniques with mathematical models can compensate for the drawbacks of each method. Deep learning methods can help increase accuracy, while mathematical models can save computational costs by constraining the neural network (NN) structure. The combined method is efficient for capturing the dynamics of real-life data with a small sample size. In addition, the trained model can be sparsely regressed to a concise parametric model using data-driven methods for learning the mechanics, and used for prediction. In this thesis we focus on the application to epidemic modelling. Some theoretical background is introduced in Chapter 1. In Chapter 2, the methodology for developing scientific learning model on epidemic population data is explained. Discrete time-shifting is considered because of the latent detection of infected population. The undetected rate is modelled in two ways: using a constant detection rate, and by involving the detection rate as an output of the NN. The trained models are regressed to the dynamic systems via SINDy for learning the terms, and for prediction. In Chapter 3, we apply the model to the first wave of COVID-19 in Calgary where the data only contains 12 points of weekly detected infected population. In Chapter 4, the model is extended to the first wave of COVID-19 in Canada, where there is training data containing 18 weeks of the detected infected population and the deceased population. In Chapter 5, some conclusions are drawn and the future potential of this method is discussed.
Longitudinal thermal imaging for scalable non-residential HVAC and occupant behaviour characterization
Creators: name: Ramani, Vasantha
name: Martin, Miguel
name: Arjunan, Pandarasamy
name: Chong, Adrian
name: Poolla, Kameshwar
name: Miller, Clayton
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This work presents a study on the characterization of the air-conditioning (AC) usage pattern of non-residential buildings from thermal images collected from an urban-scale infrared (IR) observatory. To achieve this first, an image processing scheme, for cleaning and extraction of the temperature time series from the thermal images is implemented. To test the accuracy of the thermal measurements using IR camera, the extracted temperature is compared against the ground truth surface temperature measurements. It is observed that the detrended thermal measurements match well with the ground truth surface temperature measurements. Subsequently, the operational pattern of the water-cooled systems and window AC units are extracted from the analysis of the thermal signature. It is observed that for the water-cooled system, the difference between the rate of change of the window and wall can be used to extract the operational pattern. While, in the case of the window AC units, wavelet transform of the AC unit temperature is used to extract the frequency and time domain information of the AC unit operation. The results of the analysis are compared against the indoor temperature sensors installed in the office spaces of the building. It is realized that the accuracy in the prediction of the operational pattern is highest between 8 pm to 10 am, and it reduces during the day because of solar radiation and high daytime temperature. Subsequently, a characterization study is conducted for eight window/split AC units from the thermal image collected during the nighttime. This forms one of the first studies on the operational behavior of HVAC systems for non-residential buildings using the longitudinal thermal imaging technique. The output from this study can be used to better understand the operational and occupant behavior, without requiring to deploy a large array of sensors in the building space.
Macbeth as Avatar : fandom in British Romantic theatre audiences
Creators: name: Soulstein, Seth Koozel
Publisher: name: University of British Columbia
Year: 2012

description: This study aims to place two previously disconnected areas of academic inquiry, Romantic theatre studies and fandom studies, in dialogue with one another, to the mutual benefit of both fields. Towards this end, I focus on a particular manifestation of fan behavior, the deployment of popular iconography and mythology as a protest strategy – a mode of fandom recently codified as “Avatar activism” by Henry Jenkins, a leading fan scholar – and look for its existence in a specific moment in time in Romantic London: the 1809 Old Price Riots. Fandom studies, as a discipline, looks at active media audiences, and the ways in which they build upon source media texts. In the first chapter, I give an overview as to the history of this relatively young branch of scholarship, which brings us to the current moment, in which Avatar activism can be considered a mode of fan behavior. Following that, I focus on the Romantic period for the remainder of the thesis. In the second chapter, I choose three various case studies of engaged audiences – Sarah Siddons as celebrity icon; hippodrama and genre fandom; and intertextuality, transmedia, and what David A. Brewer has called “imaginative expansion” - which set the stage for the idea that fan behavior was alive and well in the early nineteenth century. In the final chapter, I focus on the Old Price Riots, and the rioters’ use of Shakespeare-as-icon and Shakespearean mythology as a Romantic manifestation of Avatar activism. With this study, I aim to provide a larger historical context for modern conceptions of fandom, as well as to offer greater insight into audience/text dynamics that existed in Romantic London.
Sensitivity of Resonant Axion Haloscopes to Quantum Electromagnetodynamics
Creators: name: Tobar, Michael E.
name: Thomson, Catriona A.
name: McAllister, Benjamin T.
name: Goryachev, Maxim
name: Sokolov, Anton
name: Ringwald, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently interactions between putative axions and magnetic monopoles have been revisited by two of us [arXiv:2205.02605 [hep-ph]]. It has been shown that significant modifications to conventional axion electrodynamics arise due to these interactions, so that the axion-photon coupling parameter space is expanded from one parameter $g_{aγγ}$ to three $(g_{aγγ},g_{aAB},g_{aBB})$. We implement Poynting theorem to determine how to exhibit sensitivity to $g_{aAB}$ and $g_{aBB}$ using resonant haloscopes, allowing new techniques to search for axions and a possible indirect way to determine if magnetically charged matter exists.
description: Published Version in Annalen der Physik https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.202200594
Gravitino dark matter and neutrino masses with bilinear R-parity violation
Creators: name: Restrepo, Diego
name: Taoso, Marco
name: Valle, J. W. F.
name: Zapata, Oscar
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Bilinear R-parity violation provides an attractive origin for neutrino masses and mixings. In such schemes the gravitino is a viable decaying dark matter particle whose R-parity violating decays lead to monochromatic photons with rates accessible to astrophysical observations. We determine the parameter region allowed by gamma-ray line searches, dark matter relic abundance and neutrino oscillation data, obtaining a limit on the gravitino mass $m_{\tilde G} \lsim$ 1-10 GeV corresponding to a relatively low reheat temperature $T_R \lsim$ few $\times 10^7-10^8$ GeV. Neutrino mass and mixing parameters may be reconstructed at accelerator experiments like the Large Hadron Collider.
description: 10 pages, 4 figures, match the published version
Supplementary document for Silicon MMI-based power splitter for multi-band operation at 1.55 and 2 μm wavebands - 6288695.pdf
Creators: name: Yi, Qiyuan
name: Cheng, Guanglian
name: Yan, Zhiwei
name: Li, qiyuan
name: Xu, Fanglu
name: Zou, Yongchao
name: Li, Ting
name: Sun, Yuhan
name: Zou, Yi
name: yu, yu
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Document 1