cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Integration of thin-film hexagonal boron nitride with photonic microstructures
Creators: Scheuer, Kyle G.
Publisher: name: University of Alberta Library
Year: 2022

Single photon emitters hosted in hexagonal boron nitride have attracted significant attention over the past 5 years. This is in part due to their room temperature operation, chemical and physical stability, and high quantum efficiency. Continuous hexagonal boron nitride thin films (~ 10 – 20 nm thick) are of particular interest because of their potential to be integrated with existing silicon photonics devices. Additionally, there have been multiple reports of the deterministic activation of hBN emitters through the introduction of strain on the materials crystal lattice.

This thesis describes the theory, fabrication, and characterization of hexagonal boron nitride coated nano-/micro-structures as a method of both deterministically activating defect centers as well as spatially aligning them to resonant antinodes in buckled microcavity devices. First, the design and construction of an epifluorescence spectroscope/microscope instrument crucial to the optical characterization of hBN emitters, is presented. A particular emphasis was placed on accounting for undesirable autofluorescence from microscope objectives.

Next, a thin-film transfer technique for hexagonal boron nitride (hBN) multilayers was developed and refined. The technique was then used to transfer continuous hBN films to SiO2 substrates patterned with structures ~ 100 – 200 nm in height with lateral dimensions on the order of a few μm. Blanketing the film over nanoscale-height features introduces strain on the hBN crystal lattice near feature edges, causing naturally present defects to emit across much of the visible range. Notably, the brightness of emitting arrays was characterized and shown to be much greater than emission from unintentional wrinkles in the film.

The transfer process was then used as a means of integrating hBN emitters inside recently demonstrated buckled microcavities, where two Bragg mirrors separated by a low-adhesion layer are thermally shocked resulting in the formation of a closed cavity structure due to the stress inherent to the thin films comprising the top mirror. Both the active and passive optical properties of the resulting devices were then measured. The scalability and deterministic placement provided by the hBN transfer process paired with the potential for cavity enhancement offers a promising platform for a real-world single photon source with broad applications in quantum information and computing.
Probing the non-equilibrium dynamics of hot and dense QCD with dileptons
Creators: name: Vujanovic, Gojko
name: Paquet, Jean-Francois
name: Denicol, Gabriel S.
name: Luzum, Matthew
name: Schenke, Bjoern
name: Jeon, Sangyong
name: Gale, Charles
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: It is argued that, in heavy ion collisions, thermal dileptons are good probes of the transport properties of the medium created in such events, and also of its early-time dynamics, usually inaccessible to hadronic observables. In this work we show that electromagnetic azimuthal momentum anisotropies do not only display a sensitivity to the shear relaxation time and to the initial shear-stress tensor profile, but also to the temperature dependence of the shear viscosity coefficient.
description: 4 pages, 6 figures, Proceedings for Quark Matter 2014, Darmstadt, Germany, May 19-24, 2014
OAHP Inventory, Building 189 Nurses Quarters, Fort Sam Houston, Texas
Creators: name: Walter, Chelsea
Publisher: name: Office of Archaeology and Historic Preservation
Year: 1978
Subjects: subject: Fort Sam Houston
valueUri: https://core.tdar.org/browse/geographic-keyword/83681/fort-sam-houston
subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Non-Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/309/non-domestic-structures
subject: OAHP
valueUri: https://core.tdar.org/browse/other-keyword/138292/oahp
subject: Nurse's Quarters
valueUri: https://core.tdar.org/browse/other-keyword/152871/nurses-quarters
subject: Building 189
valueUri: https://core.tdar.org/browse/other-keyword/146331/building-189
subject: Pentathlon Training Center
valueUri: https://core.tdar.org/browse/other-keyword/159052/pentathlon-training-center
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Architectural Survey
valueUri: https://core.tdar.org/browse/investigation-type/2/architectural-survey
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: An inventory form by the Office of Archaeology and Historic Preservation for Building 189 at Fort Sam Houston, Texas. The structure was built in 1918 as nurse's quarters and now serves as a pentathlon training center.
Letter from Scott Shepherd III to Leon, Briefing on SHPO Coordination Concerning Parking Lot Construction, Randolph Air Force Base, Texas
Creators: name: Shepherd, Scott B.
Publisher: name: Randolph Air Force Base
Year: 2009
Subjects: subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Randolph Air Force Base
valueUri: https://core.tdar.org/browse/geographic-keyword/78971/randolph-air-force-base
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Non-Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/309/non-domestic-structures
subject: Road, Trail, and Related Structures or Features
valueUri: https://core.tdar.org/browse/site-type/294/road-trail-and-related-structures-or-features
subject: Duplex Housing Area
valueUri: https://core.tdar.org/browse/other-keyword/158192/duplex-housing-area
subject: Housing
valueUri: https://core.tdar.org/browse/other-keyword/31892/housing
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: This is continued correspondence between Randolph Air Force Base and the State Historic Preservation Office concerning the difference in opinion on the proposed construction of parking lots in the Duplex Housing Area at Randolph.
title: ADVANCED VIRTUAL REALITY HEADSET BASED TRAINING TO IMPROVE YOUNG DRIVERS’ LATENT HAZARD ANTICIPATION ABILITY
Creators: name: Agrawal, Ravi
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: Driving safety among young novice driver is one of the largest concern in the transportation domain. Many Paper-based or PC- based training program have been developed over the years to train the young novice driver to improve their driving skills (Hazard Anticipation). This training programs does help young novice driver to improve their situational awareness and so the hazard anticipation skills. But, there is one common problem with most of the currently available training programs. They are not very immersive, because such training program mostly provide plain view of the training scenario’s along with some description about the scenario and the subject trained in such training method needs to translate the provided knowledge in the plain view into the real-world driving.
An Advanced training program on risk awareness and perception was developed and evaluated in Oculus rift platform. The primary objective is to train the young novice driver in the Virtual reality headset based risk awareness and perception training program and evaluate the trained driver in the driving simulator against the placebo trained young novice driver. The Virtual reality headset based risk awareness and perception training program (V-RAPT) is based on 3M Error-based Training approach where the driver will have 80 horizontal degrees’ and 90 vertical degrees’ field of view.
Thirty-six drivers will receive training in the respective training methods- V-RAPT (Virtual reality headset based risk awareness and perception training), RAPT (PC- based risk awareness and perception training) and placebo training. Twelve young novice driver trained in the V-RAPT group will served as experimental group. Twenty-four other young novice will receive training in the RAPT and Placebo training respective will serve as control group. After training all three-group trained driver will be evaluated in the advanced driving simulator and the eye movement of the all thirty-six participants are recorded and measured. Vehicle measures such as acceleration, velocity and brake position is also recorded. The drivers’ score will based on whether or not their eye-fixations indicated recognition of potential risks in different high risk driving situations. The evaluation driver included six scenarios used in the V-RAPT training (near transfer scenarios) and four scenarios that were not used in the V-RAPT training (far transfer scenarios).
Drivers who received the V-RAPT training are expected to drive more safely than the drivers who received either training. The V-RAPT trained drivers are expected to glance on regions (Hazard anticipation) where potential risks might appear than the drivers’ trained in the RAPT and Placebo training method. Further, The V-RAPT trained drivers are expected have slower average velocity and better brake position (Hazard mitigation) are compared to the driver trained in the other two training method.
Mid-infrared interferometry with K band fringe-tracking I. The VLTI MIDI+FSU experiment
Creators: name: Müller, A.
name: Pott, J. -U.
name: Mérand, A.
name: Abuter, R.
name: Delplancke-Ströbele, F.
name: Henning, Th.
name: Köhler, R.
name: Leinert, Ch.
name: Morel, S.
name: Duc, T. Phan
name: Pozna, E.
name: Ramirez, A.
name: Sahlmann, J.
name: Schmid, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: A turbulent atmosphere causes atmospheric piston variations leading to rapid changes in the optical path difference of an interferometer, which causes correlated flux losses. This leads to decreased sensitivity and accuracy in the correlated flux measurement. Aims: To stabilize the N band interferometric signal in MIDI (MID-infrared Interferometric instrument), we use an external fringe tracker working in K band, the so-called FSU-A (fringe sensor unit) of the PRIMA (Phase-Referenced Imaging and Micro-arcsecond Astrometry) facility at VLTI. We present measurements obtained using the newly commissioned and publicly offered MIDI+FSU-A mode. A first characterization of the fringe-tracking performance and resulting gains in the N band are presented. In addition, we demonstrate the possibility of using the FSU-A to measure visibilities in the K band. Methods: We analyzed FSU-A fringe track data of 43 individual observations covering different baselines and object K band magnitudes with respect to the fringe-tracking performance. The N band group delay and phase delay values could be predicted by computing the relative change in the differential water vapor column density from FSU-A data. Visibility measurements in the K band were carried out using a scanning mode of the FSU-A. Results: Using the FSU-A K band group delay and phase delay measurements, we were able to predict the corresponding N band values with high accuracy with residuals of less than 1 micrometer. This allows the coherent integration of the MIDI fringes of faint or resolved N band targets, respectively. With that method we could decrease the detection limit of correlated fluxes of MIDI down to 0.5 Jy (vs. 5 Jy without FSU-A) and 0.05 Jy (vs. 0.2 Jy without FSU-A) using the ATs and UTs, respectively. The K band visibilities could be measured with a precision down to ~2%.
description: 11 pages, 13 figures, Accepted for publication in A&A
Response from Scott Shepherd to Rolando Gonzales, Memorandum from Internal Renovation Building 100, Randolph Air Force Base, Texas
Creators: name: Shepherd, Scott B.
Publisher: name: Department of the Air Force, Air Education and Training Command
Year: 2009
Subjects: subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Randolph Air Force Base
valueUri: https://core.tdar.org/browse/geographic-keyword/78971/randolph-air-force-base
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Non-Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/309/non-domestic-structures
subject: Taj Mahal
valueUri: https://core.tdar.org/browse/other-keyword/153391/taj-mahal
subject: Building 100
valueUri: https://core.tdar.org/browse/other-keyword/153390/building-100
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: An evaluation was conducted concerning an internal renovation for Building 100 at Randolph Air Force Base. After reviewing the scope of work, it was determined that the proposed action will have "no adverse effect" on the historic property. This correspondence details the conditions to be met in order for the project to move forward.
The CRISIS Study: COVID-19 and Reading Impairments: Survey Investigating Socializing
Creators: Zabian, Samira
Publisher: name: University of Alberta Library
Year: 2022

An invisible disability, such as a reading impairment, can negatively influence one’s reading, writing, and spelling abilities. However, reading impairments also impact social and emotional wellbeing. Social interaction can act as a buffer against social and emotional stressors to enhance wellbeing. In the present study, we wanted to gain insight into the impact of a global emergency (the COVID-19 pandemic) on socializing in adults with and without reading impairments. Participants (N = 53; Mean Age = 26) completed an online survey which collected information on socio-demographics, health history, reading history, perceptions of the pandemic, anxiety, depression, and social and emotional measures. Standardized questionnaires of anxiety (Generalized Anxiety Disorder 7 (GAD-7)) and depression (e.g., Patient Health Questionnaire 9 (PHQ-9)) were used. Social measures included queries about social participation habits and social relationships. Emotional factors were measured using five subtests from the National Institute of Health (NIH) Toolbox Emotion Battery, including general life satisfaction, perceived stress, emotional support, instrumental support, and loneliness questionnaires. Results showed that social participation decreased over the pandemic for individuals with dyslexia and the general population, but to a greater extent for individuals with dyslexia (p= .026, p= .002, respectively). Adults with dyslexia reported lower instrumental support during the pandemic, in comparison to adults without dyslexia (p= .007). Adults with dyslexia reported greater depression scores (p= .041) and lower life satisfaction scores (p= .030), compared to adults without dyslexia, only before the pandemic. In general, adults who increased their social participation during the pandemic also reported higher life satisfaction scores on both parts A and B of the questionnaire (rs= .319, p = .026; rs= .304, p = .040, respectively), as well as higher emotional (rs= .501, p < .001) and instrumental support scores (rs= .466, p < .001). Importantly, loneliness was negatively correlated with social participation before the pandemic (rs= -.358, p = .011), but not during the pandemic. In accordance with the International Classification of Functioning, Disability and Health’s (ICF) dimension of participation, these findings underscore the protective and differential impacts of social participation for individuals with and without disabilities and the impacts of a global crisis on social participation particularly for individuals without disabilities. The differential impact of social participation for varying groups on aspects of mental health and other emotional factors during a pandemic are further discussed as well as the potential clinical implications.
Optimizing rooftop solar PV systems in urban regions considering economic and environmental aspects
Creators: Narjabadifam, Nima
Publisher: name: University of Alberta Library
Year: 2022

In recent years, utilization of photovoltaic (PV) solar systems in built-up regions have received more attention due to global warming issues and the significance of sustainable development. The rooftops of buildings are considered highly suitable for installing PV modules to harvest solar energy and thus mitigate greenhouse gas (GHG) emissions. As a result, the use of electricity generated by rooftop PV systems, which either could meet the full or partial electricity demand of buildings or act as a distributed energy resource, is expected to contribute significantly to the sustainable development of communities. In this context, the economic and environmental perspectives of the stakeholders towards roof-installed PV systems can be critical in expanding their use, and there is a need to develop a framework for optimizing rooftop solar PV systems in urban regions considering economic and environmental aspects.

This thesis develops a search space optimization method to find the optimum layout of PV panels on roofs of buildings in urban regions, considering complicated roof shapes extracted using an advanced computer vision method. Mutual shading of PV arrays and shading impacts of objects around PV systems on the annual output and installation of PVs on roofs are also investigated. Furthermore, the optimization algorithm provides a framework to simultaneously evaluate stakeholders' economic and environmental attitudes on PV modules arrangement on roofs. Payback time (PBT) and CO2 emission savings are economical and environmental criteria. Three buildings with cold climate conditions on the North Campus of the University of Alberta in Edmonton, Alberta, Canada, are investigated as case studies.

The results show the significance of stakeholders' economic and environmental perspectives on PV modules arrangement on roofs. Compared to a complete economic vision, having an environmental concern significantly enhances annual PV system output and CO2 emission savings with almost the same payback time. Furthermore, the complex shapes of roofs are also influential in choosing optimum parameters of PV systems, such as tilt angle, azimuth angle, and distances between arrays. Shading results also emphasize that not considering the shading impacts of objects around PV systems can overestimate remarkably the yearly output of PV systems. Finally, with current electricity prices and incentives considered in this study, the results show that the rooftop-installed PV projects may currently not be viable. However, applying incentives could make those projects feasible in the future.
Enhanced higher temperature (20-30 K) transport properties and irreversibility field in nano-Dy2O3 doped advanced internal Mg infiltration processed MgB2 composites
Creators: name: Li, G. Z.
name: Sumption, M. D.
name: Rindfleisch, M. A.
name: Thong, C. J.
name: Tomsic, M. J.
name: Collings, E. W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A series of MgB2 superconducting composite strands co-doped with Dy2O3 and C were prepared via an advanced internal Mg infiltration (AIMI) route.The transport properties and MgB2 layer growth were studied in terms of the Dy2O3 doping level, reaction temperature, and reaction time. Transport studies showed that both critical current densities, Jcs, and irreversibility fields, Birrs, were increased with Dy2O3 doping. The highest layer Jc was 1.35 x 10^5 A/cm2 at 4.2 K, 10 T, 30% higher than that of the best AIMI wires without Dy2O3 doping. The highest "non-barrier" Jc reached 3.6 x 10^4 A/cm2 at 4.2 K, 10 T, which was among the best results reported so far. The improvements were even more pronounced at higher temperatures where the field at which the layer Jc reached 10^4 A/cm2 was pushed out by 0.9 T at 20 K, 1.2 T at 25 K, and 1.4 T at 30 K. While little or no enhancement in Birr was seen at 10 K and 15 K, the increases in Jc at higher temperatures were consistent with observed increases in Birr of 17% at 20 K, 44% at 25 K, and 400% at 30 K. Also, there were some indications that the reaction and layer growth of MgB2 was enhanced by Dy2O3 doping.
description: 9 pages, 2 tables, 4 figures, Presented in ASC 2014, Charlotte NC (No. 2MPo2B-07)
A SiPM-based ZnS:$^6$LiF scintillation neutron detector
Creators: name: Stoykov, A.
name: Mosset, J. -B.
name: Greuter, U.
name: Hildebrandt, M.
name: Schlumpf, N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: In the work presented here we built and evaluated a single-channel neutron detection unit consisting of a ZnS:$^6$LiF scintillator with embedded WLS fibers readout by a SiPM. The unit has a sensitive volume of 2.4 x 2.8 x 50 mm$^3$; 12 WLS fibers of diameter 0.25 mm are uniformly distributed over this volume and are coupled to a 1 x 1 mm$^2$ active area SiPM. We report the following performance parameters: neutron detection efficiency $\sim 65\,$% at $1.2\,Å$, background count rate $< 10^{-3}$ Hz, gamma-sensitivity with $^{60}$Co source $< 10^{-6}$, dead time $\sim 20\,μ$s, multi-count ratio $< 1\,$%. All these parameters were achieved up to the SiPM dark count rate of $\sim 2\,$MHz. We consider such detection unit as an elementary building block for realization of one-dimensional multichannel detectors for applications in the neutron scattering experimental technique. The dimensions of the unit and the number of embedded fibers can be varied to meet the specific application requirements. The upper limit of $\sim 2\,$MHz on the SiPM dark count rate allows to use SiPMs with larger active areas if required.
description: 10 pages, 10 figures
title: State responsibility for international law violations involving non-state actors in armed conflict
Creators: name: Maddocks, Jennifer Helen
Publisher: name: University of Reading
Year: 2022

description: Contemporary conflict is replete with examples of states acting through private partners or proxies to pursue their foreign policy and security goals. Frequently, however, non-state actors (NSA) in receipt of state support act in a manner that potentially violates international law. This thesis considers states’ international responsibility for such breaches, examining the circumstances in which the law of state responsibility attributes an NSA’s conduct to a state. The principal objectives of the study are threefold: to clarify the precise circumstances in which private conduct is attributable to a state in contemporary conflict; to evaluate the sufficiency of the rules of attribution; and to assess how any inadequacies in the regulation of states’ support to NSAs in conflict situations should be remedied. Having examined the law’s practical impact, using three contemporary conflicts as case studies, the thesis argues that there is a gap in accountability that allows states to act via proxy in a manner that they could not lawfully act via their own organs. While this lacuna is partially filled by primary norms of international law, these are fragmented and incomplete in their effects. To properly regulate states’ dealings with NSAs in armed conflict, therefore, international law must evolve. First, a less stringent interpretation of the rules of attribution is necessary, to better meet the object and purpose of the law of state responsibility in light of the realities of states’ contemporary interactions with NSAs. Second, international law must hold states to account for their own actions in facilitating NSA conduct that would be internationally wrongful if perpetrated directly by the state. This can be addressed not only via the law of state responsibility but also by strengthening relevant primary norms of international law.
Preservation Brief 18, Rehabilitating Interiors in Historic Buildings: Identifying and Preserving Character-Defining Elements
Creators: name: H. Ward Jandl
Publisher: name: Technical Preservation Services, National Park Service
Year: 2004
Subjects: subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Conservation
valueUri: https://core.tdar.org/browse/other-keyword/1819/conservation
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Methodology, Theory, or Synthesis
valueUri: https://core.tdar.org/browse/investigation-type/6/methodology-theory-or-synthesis
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management
subject: Site Stabilization
valueUri: https://core.tdar.org/browse/investigation-type/11/site-stabilization

description: This is number eighteen of 42 preservation briefs prepared by the Technical Preservation Services of the National Park Service. This brief focuses on the rehabilitating interiors in historic buildings, specifically identifying and preserving character-defining elements. This Preservation Brief has been developed to assist building owners and architects in identifying and evaluating those elements of a building's interior that contribute to its historic character and in planning for the preservation of those elements in the process of rehabilitation. The guidance applies to all building types and styles, from 18th century churches to 20th century office buildings. The Brief does not attempt to provide specific advice on preservation techniques and treatments, given the vast range of buildings, but rather suggests general preservation approaches to guide construction work.
A 3D extinction map of the Northern Galactic Plane based on IPHAS photometry
Creators: name: Sale, S. E.
name: Drew, J. E.
name: Barentsen, G.
name: Farnhill, H. J.
name: Raddi, R.
name: Barlow, M. J.
name: Eislöffel, J.
name: Vink, J. S.
name: Rodríguez-Gil, P.
name: Wright, N. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a three dimensional map of extinction in the Northern Galactic Plane derived using photometry from the IPHAS survey. The map has fine angular ($\sim 10$ arcmin) and distance (100 pc) sampling allied to a significant depth ($\gtrsim 5$ kpc). We construct the map using a method based on a hierarchical Bayesian model as previously described by Sale (2012). In addition to mean extinction, we also measure differential extinction, which arises from the fractal nature of the ISM, and show that it will be the dominant source of uncertainty in estimates of extinction to some arbitrary position. The method applied also furnishes us with photometric estimates of the distance, extinction, effective temperature, surface gravity, and mass for $\sim 38$ million stars. Both the extinction map and the catalogue of stellar parameters are made publicly available via http://www.iphas.org/extinction .
description: 17 pages, 13 figures, accepted for publication in MNRAS. Data can be downloaded from http://www.iphas.org/extinction . References updated
An Interactive 3D Visualization Tool to Analyze the Functionality of Convolutional Neural Networks
Creators: Fatemi Pour, Farnoosh
Publisher: name: University of Alberta Library
Year: 2022

Convolutional Neural Networks have outperformed traditional image processing approaches for many image classification tasks. However, despite achieving high classification accuracy on multiple datasets, these machine learning approaches are not transparent and act more like a black box. For this reason, explaining how they work and how they perform classifications is essential for research and education.

This lack of interpretability prevents students and beginners in the field from fully understanding the internal functionality of these networks. Moreover, it makes it hard for an expert to debug the models and enhance their performance. Lastly, not explaining how a model produces an output decreases the user's trust in such machine learning models, especially in medicine.

Visualizing the internal variables of convolutional networks enables us to understand how the model processes the input data and generates the output classifications. It also allows us to show how neural networks work by exploring the sensitivity of the model to small changes in the input and how the internal variables affect the results of the classification.

These models usually have multiple convolutional and fully-connected layers with hundreds or even thousands of neurons in each layer. Visualizing this large number of variables intuitively is challenging as it is computationally expensive and hard to display with limited screen resolution.

This thesis proposes a novel interactive tool to visualize convolutional neural networks in using 3D graphics. The first part of our method partitions the feature maps into clusters instead of showing all feature maps simultaneously. We use a K-Means clustering algorithm to cluster the feature maps and then use principal component analysis to represent each cluster's parameters. The tool also allows the user to create modified versions of the original input by applying binary masks and helps them to analyze the impact of removing different regions of the initial input data.

We evaluate this new tool by surveying eight participants with diverse backgrounds and asking them multiple questions about its effectiveness and user experience. In addition, we ask participants to compare the proposed tool with another baseline visualization method. Our evaluation indicates that clustering the feature maps in each layer is an effective and helpful way for the user to understand how convolutional neural networks work.
Letter from Joseph Logan to Claudia Nissley, Building 156, Randolph Air Force Base, Texas
Creators: name: Logan, Joseph M.
Publisher: name: Randolph Air Force Base
Year: 1993
Subjects: subject: Randolph Field Historic Landmark District
valueUri: https://core.tdar.org/browse/geographic-keyword/83364/randolph-field-historic-landmark-district
subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Randolph Air Force Base
valueUri: https://core.tdar.org/browse/geographic-keyword/78971/randolph-air-force-base
subject: World War II
valueUri: https://core.tdar.org/browse/temporal-keyword/3992/world-war-ii
subject: WWII
valueUri: https://core.tdar.org/browse/temporal-keyword/5196/wwii
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Non-Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/309/non-domestic-structures
subject: Building 156
valueUri: https://core.tdar.org/browse/other-keyword/146304/building-156
subject: Temporary Building
valueUri: https://core.tdar.org/browse/other-keyword/158926/temporary-building
subject: World War II
valueUri: https://core.tdar.org/browse/other-keyword/124433/world-war-ii
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: An email with attachments concerning proposed undertakings for Building 156 at Randolph Air Force Base, Texas. This letter is part of a large packet of correspondence and associated documents concerning a complex proposal of undertakings for World War II temporary buildings located on Randolph Air Force Base, Texas. Many of the documents are drafts and letters from internal circulation within Randolph Air Force Base.
The Einstein-de Haas Effect in Yttrium Iron Garnet at Radio Frequencies
Creators: Dunsmore, Michael G
Publisher: name: University of Alberta Library
Year: 2022

The Einstein-de Haas (EdH) effect was measured for the first time more than a century ago, and a classical theory of its operational principle existed many years before the first observation of the effect. EdH torques are generated by the time rate of change of angular momentum and represent the close relationship between magnetism and mechanical angular momentum. This work serves to build upon a trend of miniaturizing EdH experiments, thereby increasing the frequency that EdH torques are applied. The pursuit of extending EdH torques to higher frequency outlines a distinct benefit of the EdH effect: the torque scales linearly in magnitude with drive frequency. This linear scaling of EdH torques is in stark contrast with conventionally studied cross-product torques, which scale linearly with applied DC field and are frequency independent. The first measurement of the EdH effect featured torques that were of order one million times smaller than cross-product torques. Enabled by nanofabrication of mechanical torsional resonators, we have brought measurements of the EdH effect to the nanoscale, and subsequently to radio frequencies where EdH and cross-product torques are of similar magnitude.Single crystal disks of yttrium iron garnet (YIG) with vortex ground states were affixed to the nanofabricated torsional resonators. Owing to the distinct origin of EdH and cross-product torques, we were able to simultaneously measure the torques and observed relative differences in the signal phases as the field was swept. The DC field where EdH and cross-product torque signals intersect allows us to calculate the magnetomechanical ratio g′ for YIG: the first measurement of its kind. Our results yield g′ = 1.78 ± 0.16. The uniformity of driving fields allows for the extension of EdH torque measurements beyond the low field and ultimately beyond annihilation of the vortex state. EdH torques in intermediate and high field ranges serve as a sensitive probe of magnetic surface defects. Future directions of this work are presented with an emphasis on testing the limit of the linear increase of EdH torque with frequency. We suggest that a phase-lag with respect to the driving field will emerge for high enough mechanical frequencies that will signal the out-pacing of spin lattice relaxation times.
Data Dissemination Performance in Large-Scale Sensor Networks
Creators: name: Meyfroyt, Thomas M. M.
name: Borst, Sem C.
name: Boxma, Onno J.
name: Denteneer, Dee
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: C.2.1
subject: 90B18

description: As the use of wireless sensor networks increases, the need for (energy-)efficient and reliable broadcasting algorithms grows. Ideally, a broadcasting algorithm should have the ability to quickly disseminate data, while keeping the number of transmissions low. In this paper we develop a model describing the message count in large-scale wireless sensor networks. We focus our attention on the popular Trickle algorithm, which has been proposed as a suitable communication protocol for code maintenance and propagation in wireless sensor networks. Besides providing a mathematical analysis of the algorithm, we propose a generalized version of Trickle, with an additional parameter defining the length of a listen-only period. This generalization proves to be useful for optimizing the design and usage of the algorithm. For single-cell networks we show how the message count increases with the size of the network and how this depends on the Trickle parameters. Furthermore, we derive distributions of inter-broadcasting times and investigate their asymptotic behavior. Our results prove conjectures made in the literature concerning the effect of a listen-only period. Additionally, we develop an approximation for the expected number of transmissions in multi-cell networks. All results are validated by simulations.
L’amour fait-il aimer les choux de Bruxelles ? La transformation des habitudes alimentaires pendant la vie conjugale chez les jeunes adultes
Creators: name: Fouquet, Angele
name: Fouquet, Angele
Publisher: name: Unknown
Year: 2022
Subjects: Food Consumption/Nutrition/Food Safety

description: Agir sur les comportements nutritionnels, comme le souhaitent certaines politiques de prévention, n’est possible qu’en tenant compte de l’influence des proches, qui est peu étudiée dans le cadre du couple cohabitant sans enfant. De plus, consommations et tâches domestiques alimentaires sont aujourd’hui un important enjeu d’égalitarisme entre femmes et hommes. Dans le cadre d’une thèse de sociologie, nous avons questionné l’interaction entre les pratiques alimentaires et la mise en couple. A quelle vitesse et pourquoi les alimentations sont-elles mises en commun ? Cela transforme-t-il les alimentations des hommes par rapport à celles des femmes ? Comment se décide qui prend en charge les tâches alimentaires ? Pour y répondre, nous avons comparé les habitudes alimentaires de couples de jeunes adultes (18-33 ans) hétérosexuels, avant et après leur récente installation dans un logement commun.
Letter from Michael Grizer to Mark Wolfe, Project Proposal to Install Sitting Area on Grounds of Quadrangle, Fort Sam Houston, Texas
Creators: name: Grizer, Michael J.
Publisher: name: Department of the Air Force, Fort Sam Houston
Year: 2011
Subjects: subject: JBSA-Sam Houston
valueUri: https://core.tdar.org/browse/geographic-keyword/82532/jbsa-sam-houston
subject: San Antonio
valueUri: https://core.tdar.org/browse/geographic-keyword/4149/san-antonio
subject: Bexar (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/4150/bexar-county
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Fort Sam Houston National Historic Landmark District
valueUri: https://core.tdar.org/browse/geographic-keyword/82955/fort-sam-houston-national-historic-landmark-district
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/318/governmental-structure
subject: Historic Governmental Structure
valueUri: https://core.tdar.org/browse/site-type/320/historic-governmental-structure
subject: Non-Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/309/non-domestic-structures
subject: Clock Tower
valueUri: https://core.tdar.org/browse/other-keyword/146776/clock-tower
subject: Building 40
valueUri: https://core.tdar.org/browse/other-keyword/146155/building-40
subject: Quadrangle
valueUri: https://core.tdar.org/browse/other-keyword/146777/quadrangle
subject: Building 16
valueUri: https://core.tdar.org/browse/other-keyword/146154/building-16
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: Fort Sam Houston is proposing to install two sitting areas on the grounds of the Quadrangle. The Quadrangle, Building 16, and the Clock Tower, Building 40, are both landmarks listed in the National Register of Historic Places. After careful review, the cultural resource staff at Fort Sam Houston has determined that this undertaking will result in no averse effect to these historic buildings or surrounding grounds.
Testing numerical implementations of strong field electrodynamics
Creators: name: Harvey, C. N.
name: Ilderton, A.
name: King, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We test current numerical implementations of laser-matter interactions by comparison with exact analytical results. Focussing on photon emission processes, it is found that the numerics accurately reproduce analytical emission spectra in all considered regimes, except for the harmonic structures often singled out as the most significant high intensity/multi-photon effects. We find that this discrepancy originates in the use of the locally constant field approximation.
description: 9 pages, 10 figures
Supporting Quality and Longevity in Alberta’s Family Day Home Educators: A Qualitative Study
Creators: Woodman, Laura A.
Publisher: name: University of Alberta Library
Year: 2022

Quality and longevity are two integral components in early learning and childcare. However, for family day home educators working in isolated and decentralized environments, providing quality and longevity in childcare is easier said than done. The current research on early childhood education largely focuses on centre-based care, leaving a marked gap of knowledge on the strengths and challenges of educators working in family day homes, and the supports needed for them to thrive. The aim of this research is to help fill that gap. Employing a community-based participatory research (CBPR) approach, this qualitative study explores the strengths and challenges facing Alberta’s contracted family day home educators, and the supports which enable them to offer quality and longevity in childcare. Five focus groups were conducted with twenty-six experienced educators and consultants working with licensed day homes in Alberta, and a directed approach to content analysis was used to analyze the data. The results of this study include educator strengths, challenges, and areas that can act as either strengths or challenges. Day home educator strengths include enjoying their work, networking and problem-solving, and advocacy. Challenges are guilt and worry leading to minimizing time off, day homes being treated the same as day cares, and misperceptions. Areas that can act as a strength or a challenge include relationships, inclusivity, and continuing education. This study’s findings contribute to knowledge about day home educator strengths, challenges, and supports enabling them to offer quality and longevity in childcare. Consistent with a CBPR approach, the results of this research should prompt targeted practice and policy change for educators and their support systems, which will benefit children and families, and ultimately contribute to a stronger, more cohesive and healthy society.
Microstructure, mechanical properties, corrosion, and wear behavior of high-entropy alloy AlCoCrFeNix (x>0) and medium-entropy alloy (x=0)
Creators: Sim, Rui Ken
Publisher: name: University of Alberta Library
Year: 2022

As one of the early studied high-entropy alloys, AlCoCrFeNi drew considerable attention due to its attractive mechanical properties. Efforts were made to improve this material by alloying with additional elements or modifying the ratio of its elements for improved properties. On the other hand, medium-entropy alloys with fewer elements can also have superior performance with less complication. In this study, we investigated the microstructures and properties of as-cast AlCoCrFeNix alloys (x = 0-2), focusing on the microstructural evolution and the corresponding mechanical properties and resistance to wear, corrosion, and corrosive wear. In particular, the Ni-free four-element medium-entropy alloy, AlCoCrFe, was examined and compared with its five-element high-entropy companion, AlCoCrFeNi. It was observed that the medium-entropy alloy was harder and had a higher resistance to wear and corrosion than the five-element alloy. Detailed microstructural analyses demonstrated that the medium-entropy alloy AlCoCrFe had a spinodal-decomposed nanostructure, which grew into a two-phase microstructure with phase transformation in the five-element high-entropy alloy. With increasing Ni content, one of the phases changed from a disordered BCC structure to a softer and more ductile FCC structure, further lowering the strength of the high-entropy alloy and its resistance to wear. The medium-entropy alloy showed certain advantages with superior properties while having less complicated microstructure features.
Monte Carlo Tree Search in the Presence of Model Uncertainty
Creators: Aghakasiri,  Kiarash
Publisher: name: University of Alberta Library
Year: 2022

Monte Carlo Tree Search (MCTS) is an extremely successful search-based frame- work for decision making. With an accurate simulator of the environment’s dynamics, it can achieve great performance in many games and non-games applications. However, without a perfect simulator, the performance degradation is so high that it can make the framework almost useless. Therefore, we propose two methods to improve the performance of MCTS in such a scenario: Deep Q-Network MCTS (DQMCTS) and Uncertainty Adapted MCTS (UAMCTS). In the former, we use the model-free algorithm DQN to evaluate the leaf nodes in the search tree. Although this approach shows promising improvement over baseline MCTS, our results show that there is still more room for improvement. In UAMCTS, we take a more fundamental approach and change the behavior of MCTS’s components to directly take the model incorrectness into account. Our results show that with an accurate measure of model incorrectness, UAMCTS can achieve the performance of MCTS with a perfect simulator in some cases. Even with a poor measure of model error, UAMCTS can still outperform plain MCTS with an imperfect simulator.