cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effect of nano-scale surface roughness on transverse energy spread from GaAs photocathodes
Creators: name: Karkare, Siddharth
name: Bazarov, Ivan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High quantum yield, low transverse energy spread and prompt response time make GaAs activated to negative electron affnity, an ideal candidate for a photocathode in high brightness photoinjectors. Even after decades of investigation, the exact mechanism of electron emission from GaAs is not well understood. We show that a nanoscale surface roughness can affect the transverse electron spread from GaAs by nearly an order of magnitude and explain the seemingly controversial experimental results obtained so far. This model can also explain the measured dependence of transverse energy spread on the wavelength of incident light.
description: 3pages, 3figures
Shear behavior of full-scale reinforced concrete members strengthened with anchored CFRP materials
Creators: name: Alotaibi, Nawaf Khaled
Publisher: name: The University of Texas at Austin
Year: 2024
Subjects: CFRP
Shear
Anchored

description: Numerous studies on shear strengthening with CFRP material are reported in the literature. However, the majority of these studies were conducted on small-scale specimens that have little or no transverse reinforcement. A comprehensive review of the literature showed that without proper anchorage, CFRP materials did not increase the shear strength of the member due to debonding between the material and the concrete surface. In order to better understand the shear behavior of members strengthened with anchored CFRP strips, ten tests were performed on large-scale T-beams. The beams were tested with various CFRP layouts, CFRP reinforcement ratios, and transverse steel reinforcement ratios. The test results provided invaluable information on the shear behavior of strengthened members when sufficient anchorage is provided for CFRP material and debonding failure is precluded. A detailed discussion of the interaction between the materials is presented based on the observations from the experimental tests. The performance of the test specimens was compared at service loads, and at ultimate capacity. The results of this study were added to a database that was used to develop design recommendations to estimate the shear capacity of members strengthened with anchored CFRP material. The comparison between predicted shear capacities and experimental test results showed that the proposed design recommendations provided much more accurate estimates of shear strength than existing guidelines. The tests reported in this dissertation are not only critical for understanding the shear behavior of members strengthened in shear with anchored CFRP material, but also extremely valuable in filling the gaps in the literature and expanding the limited data available.
Debating nature : science and decision-making in pacific salmon hatcheries
Creators: name: Hawkins, Timothy John
Publisher: name: University of British Columbia
Year: 2019

description: The presence of hatcheries in the management of Pacific salmon in North America, in the fact they constitute a literal interface between humans and nature, is unique in the species that humans actively manage for food or other benefit. This, in tandem with the scientific criticism they face through salmon management literature, situate hatcheries as an opportune subject for the study of decision-making about science in natural resource management or conservation settings. This thesis explores the broader question of how decisions are made regarding new science in Pacific Salmon hatcheries through the study of two separate contexts at two different scales. The first research chapter addresses the question: how have hatcheries and the scientific research that is focused on them been discussed in the public sphere? This is achieved through a newspaper content analysis with a focus on the examination of framing mechanisms in the words of the journalists and those they feature. This chapter reveals that hatcheries are portrayed and debated based on the benefits they provide, but also on the scientific and economic concerns that people have about them. These risks and benefits were directly pitted against each other in a media debate regarding a question involving interpretation of the United States Endangered Species Act, which involved brought much of the scientific research about hatcheries into the public sphere. The second research chapter focuses in at a much finer scale, on the hatchery management system on Canada's west coast. In this chapter, perspectives on selective breeding as a tool in broodstock management are explored through interviews with individuals working for hatcheries and the Department of Fisheries and Oceans - Canada's salmon management authority. This chapter reveals that, though individuals hold various views about the merit and acceptability of selective breeding, there is a unanimous desire within the sample of hatchery management staff to pursue decisions that advance the naturalness of hatchery fish and overall salmon populations. Together, these inquiries contribute to a fuller understanding of the social dynamics involved in decision-making about science in the management of Pacific salmon hatcheries.
BHJet: A scale-invariant, steady-state, multi-zone model for accreting black hole jets
Creators: name: Ceccobello, Chiara
name: Lucchini, Matteo
name: Markoff, Sera
name: Kini, Yves
name: Chhotray, Atul
name: Connors, Riley
name: Crumley, Patrick
name: Falcke, Heino
name: Kantzas, Dimitrios
name: Maitra, Dipankar
Publisher: name: Zenodo
Year: 2021

description: Extensive multiwavelength campaigns of black hole X-ray binaries and large-sample AGN studies have recently provided a wealth of data capturing the phenomenon of accretion and ejection of matter in accreting black hole systems at all scales. These observations challenge our classical interpretation of the components of these systems, such as the jet and the disk, responsible for the radio-to-x-ray spectral energy distribution. In particular, a more accurate modelling of the jet properties is required to account for the wildly changing jet spectral break across many orders of magnitude in frequency and jet dynamics among sources or outburst states. Based on decades of work from our group, we have developed a new and improved version of a scale invariant, steady-state, multi-zone jet model, the BHJET code, that compared to earlier models has several new features and improvements. I will focus on the inclusion of an Inverse-Compton scattering routine that captures the transition between single and multiple scattering regimes, that accounts for a more accurate treatment of the radiative transfer and it is benchmarked on the well-known CompPS model. I will then showcase a few applications of the code to demonstrate its new capabilities, with particular attention to the prototypical X-ray binary GX339-4 in a bright hard state. The model provide two best fits to this dataset that consist in either the case of an extended optically thin and hot jet base or the physical realisation of the lamp post model where the X-ray emitting region is compact, optically thick and the electron population is relatively cool. The code is on GitHub: github.com/matteolucchini1/BHJet/.
Direct ink writing of yttrium barium copper oxide and iron silicon
Creators: name: Coveney, Arthur
Publisher: name: Loughborough University
Year: 2021
Subjects: Other physical sciences not elsewhere classified

description: Additive manufacturing has introduced new technologies to manufacture complex and intricate components. A sub-process of the additive manufacturing process, material extrusion is direct ink writing. Direct ink writing is able to process ceramic and metallic materials that are too brittle to be processed traditionally. Two materials of interest were iron silicon and yttrium barium copper oxide. Iron silicon powders with a silicon content of 3 wt%, 6 wt% or 15 wt% were formulated into a paste using the screen printing medium, System 3. These were the commercially available iron silicon’s at the time. A solid loading of 89 wt% was found to be printable for the 3 wt% and 6 wt% iron silicon powders. The addition of 0.1 wt% of fumed silica enabled the 15 wt% Iron Silicon powder to have a 90 wt% solid loading. Components were printed at a speed of 5 mms−1 through a nozzle diameter of 410 µm. Post processing consisted of drying at 80 ◦C and binder removal at 500 ◦C in air. Components were finally sintered between 1050 ◦C and 1300 ◦C in a 5 % hydrogen, 95 % argon atmosphere to reduce oxidation and remove any ferrous oxide phases. Yttrium barium copper oxide was synthesised through the solid state reaction method. An optimal calcination temperature of 900 ◦C was obtained through X-ray diffraction and magnetometery characterisations. The resultant powder was formulated into a shear thinning paste with a solid loading of 90 wt% using an oil based binder of 45 wt% ICP solvent and 55 wt% linseed oil. Components were printed at a speed of 5 mms−1 through a nozzle diameter of 254 µm. Components were post processed through drying at 80 ◦C and binder removal at 600 ◦C. The components were then sintered at 900 ◦C between 24 and 120 hours. Electrically superconducting transitions were observed in the additively produced components previously unreported in literature. Fluorine impurities were found to have doped the yttrium barium copper oxide crystal i and produced an insulating outer shell of barium fluoride. Despite these impurities, a transition temperature of 87.4 K and a lower critical field of 0.148 T was observed. Alterations to the tool path of the extruded material showed no significant changes in the superconducting properties of YBCO components. It was shown that bulk yttrium barium copper oxide components can be produced cheaply and effectively without the need for expensive laboratory equipment. Further post process was performed at 900 ◦C for 48 hours in an oxygen atmosphere. Significant improvements of the electrical properties were seen for samples sintered for shorter times. The critical current density and the magnetisation greatly improved after annealing in oxygen
Predicting Type 2 Diabetes Risk: A Non-negative Matrix Factorization Approach for Feature Selection
Creators: name: Kumar, Praveen
name: Metzger, Vincent T.
Publisher: name: Zenodo
Year: 2024
Subjects: Type 2 Diabetes

description: The use of machine learning (ML) models for predicting type 2 diabetes (T2D) is growing rapidly due to the availability of large patient datasets and advanced ML frameworks. Most studies focus on supervised classification, which relies on labeled examples, but the absence of true negative examples can weaken predictions. Toovercome this, we propose a novel unsupervised method to estimate the likelihood of T2D in undiagnosed individuals. Our study suggests that comorbid conditions such as hyperparathyroidism, iron deficiency anemia, hyperlipidemia, and vitamin D deficiency may contribute to T2D development.

Clinical relevance: Our study has the potential to enable early detection of T2D in undiagnosed patients by utilizing their co-occurring health conditions and medication history. This approach may assist healthcare providers in implementing timely interventions, ultimately leading to improved patient outcomes
The heartfelt spirit : capitalism, affect, and Pentecostal modernity in the Americas
Creators: name: Doran, Justin Michael
name: 0000-0001-7226-1734
Publisher: name: The University of Texas at Austin
Year: 2017
Subjects: Pentecostalism
Capitalism
Affect theory
Brazil
Prosperity gospel
Edir Macedo
Modernity
Americas
Canada
Houston

description: This dissertation examines how local experiences of capitalism have been mediated by Christian charismatic practices into a global Pentecost over the twentieth century. It analyzes those mediations through a series of historical vignettes that link the origins of nineteenth-century American primitivist piety to the confluence of twenty-first century global Pentecostalism in Houston. Its narrative arc embodies a continuous lineage connecting watershed changes in Christian piety across the Americas, including the proliferation of divine healing, speaking in tongues, baptizing in Jesus’ name, casting out devils, and providential sacrifice. Together, these vignettes demonstrate how Pentecostalism operated as a dynamic circulatory system for charismatic practices rather than a network of churches linked by common doctrines. The circulation of these charismatic practices both sustained local congregations and vitalized global Pentecost. I argue throughout that the historical intimacy between late capitalism and Pentecostalism suggests that Pentecost is a kind of modernity, rather than a reaction to it. In Pentecostal modernity, Christians re-formed themselves through Pentecost amid lifeways that were continually being fractured by capitalism’s relentless integration of human components into the machinery of accumulation.
Costs and Benefits of Cleaning U.S. Corn: Overview and Implications
Creators: name: Lin, William
name: Lin, Chin-Zen
name: Leath, Mack N.
name: Lin, William
name: Lin, Chin-Zen
name: Leath, Mack N.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Broken corn and foreign material (BCFM)
subject: corn
subject: costs
subject: benefits
subject: breakage susceptibility
subject: mechanical cleaning

description: Although foreign buyers show a strong preference for clean corn, cleaning is not the solution to the U.S. corn cleanliness issue. The cost of cleaning corn above and beyond the current level at the least net-cost locations, at both inland subterminals and river elevators, would exceed all benefits by $49 million per year. Costs of additional cleaning would exceed benefits in both domestic and international markets at all points in the production-marketing system. Corn price, not quality, was regarded as the most important criterion in importers' purchase decisions in most importing countries included in this study. The best way to address the corn cleanliness issue is to reduce breakage susceptibility in corn through carefully selecting drying systems and developing genotypes or hybrid varieties that are less prone to breakage.
title: Evolution of the cylindrical nanopore morphology under diffusion processes
Creators: name: Vakaeva , A.B.
name: Shuvalov,  G.M.
name: Kostyrko , S.A.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: In the present paper, we provide a theoretical approach to the analysis of nanopore morphological stability under diffusion taking into account surface elasticity. It is assumed that the pore shape may change during stress relaxation. The surface atomic flux is caused by the nonuniform distribution of chemical potential, which depends on bulk and surface stresses as well as pore surface curvature. The change in surface relief is described by the linearized evolution equation, which is derived taking into account the solution of the boundary value problem of plane elasticity for determining the elastic and surface energy. For this purpose, we use a first-order approximation of the boundary perturbation method. The solution of the linearized evolution equation allows us to analyze the influence of physical and geometrical parameters of the problem on pore surface morphological stability.
On the origin of radio-loudness in AGNs and its relationship with the properties of the central supermassive black hole
Creators: name: Chiaberge, Marco
name: Marconi, Alessandro
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the relationship between the mass of central supermassive black holes and the radio loudness of active galactic nuclei. We use the most recent calibrations to derive virial black hole masses for samples of radio loud QSOs for which relatively small masses (M_BH<10^8 M_sun) have been estimated in the literature. We take into account the effect of radiation pressure on the BLR which reduces the effective gravitational potential experienced by the broad-line clouds and affects the mass estimates of bright quasars. We show that in well defined samples of nearby low luminosity AGNs, QSOs and AGNs from the SDSS, radio-loud (RL) AGN invariably host SMBHs exceeding ~10^8 M_sun. On the other hand, radio-quiet (RQ) AGNs are associated with a much larger range of black hole masses. The overall result still holds even without correcting the BH mass estimates for the effects of radiation pressure. We present a conjecture based on these results, which aims at explaining the origin of radio-loudness in terms of two fundamental parameters: the spin of the black hole and the black hole mass. We speculate that in order to produce a RL AGN both of the following requirements must be satisfied: 1)the black hole mass M_BH has to be larger than ~10^8 M_sun; 2)the spin of the BH must be significant, in order to satisfy theoretical requirements. Taking into account the most recent observations, we envisage a scenario in which the merger history of the host galaxy plays a fundamental role in accounting for both the properties of the AGN and the galaxy morphology, which in our picture are strictly linked. RL sources might be obtained only through major dry mergers involving BH of large mass, which would give rise to both the core morphology and the significant black hole spin needed.
description: 11 pages, 4 figures, accepted for publication in MNRAS
The effect of interval training (very short, short) on RSA speed repetition efficiency in under 19-year-old football players
Creators: name: Younes Idrees, hawamdeh
name: yahyaoui, mohamed
Publisher: name: Zenodo
Year: 2024

description: This study examines how different interval training intensities impact young football players' repetitive sprinting ability. The study focuses on comparing two interval training intensities: "very short" and "short". For this purpose, an experimental design was employed. Eighteen players (age: 18 ± 0.5 years, height: 175 ± 4 cm, weight: 70 ± 3 kg) were purposefully selected and equally divided into two groups. Each group underwent a specific interval training protocol for a duration of 12 weeks. Group 1 performed a 'very short' program (10s high-intensity ;120% MAS, 10s rest), while Group 2 performed a 'short' program (20s high- intensity ;105% MAS, 20s rest). The RSA test was used to measure the fatigue index. After collecting and statistically analyzing the data using t-test, the findings showed the effectiveness of very short interval training in improving the repetitive sprint ability in football players under 19 years old
The politics of place on Lingít Aaní : regulating settler space in Juneau, Alaska
Creators: name: Meachum, Dabney Jael
Publisher: name: University of British Columbia
Year: 2019

description: This thesis looks at how settler-colonialism materializes through the conjoined city-making projects of image-making, tourism and homelessness regulation in Juneau, Alaska. Using the analytic method of haunting, I examine how these urban processes bring historical tactics of violence and erasure from the past into the present. By bringing literatures on settler-colonialism, place-making, and homelessness in conversation, I examine the urban boosterist imagining of Alaska as the Last Frontier as a practice of colonial violence and discuss how this imaginary produces conditions and practices of harm, particularly ones that target Tlingit people and place. I argue that this imaginary is positioned within a logic of elimination that seeks to undermine Indigenous ways of knowing and being on the land and seeks to further construct structures of settler hegemony in Juneau and elsewhere. The purpose of this project is to understand the relationship between settler-colonialism and the settler imaginary of place-making in Southeast Alaska. By specifically tracing these ideas through processes of unsettling in the city through the regulation of homelessness and the project of tourism, I identify how these explicit materializations of settler-colonialism in Juneau, Alaska are tied up in “imagining”. This project is about how settler space-making through the settler-imaginary is a specific tool of settler-colonialism that continues to produce Juneau and dispossess Tlingit people.
Multiwavelength Study of M8.9/3B Solar Flare from AR NOAA 10960
Creators: name: Kumar, Pankaj
name: Srivastava, A. K.
name: Filippov, B.
name: Uddin, Wahab
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a multi-wavelength analysis of a long duration white-light solar flare (M8.9/3B) event that occurred on 4 June 2007 from NOAA AR 10960. The flare was observed by several spaceborne instruments, namely SOHO/MDI, Hinode/SOT, TRACE and STEREO/SECCHI. The flare was initiated near a small, positive-polarity, satellite sunspot at the centre of the AR, surrounded by opposite-polarity field regions. MDI images of the AR show considerable amount of changes in a small positive-polarity sunspot of delta configuration during the flare event. SOT/G-band (4305 A) images of the sunspot also suggest the rapid evolution of the positive-polarity sunspot with highly twisted penumbral filaments before the flare event, which were oriented in the counterclockwise direction. It shows the change in orientation and also remarkable disappearance of twisted penumbral filaments (~35-40%) and enhancement in umbral area (~45-50%) during the decay phase of the flare. TRACE and SECCHI observations reveal the successive activations of two helical twisted structures associated with this sunspot, and the corresponding brightening in the chromosphere as observed by the time-sequence images of SOT/Ca II H line (3968 A). The secondary-helical twisted structure is found to be associated with the M8.9 flare event. The brightening starts 6-7 min prior to the flare maximum with the appearance of secondary helical-twisted structure. The flare intensity maximizes as this structure moves away from the AR. This twisted flux-tube associated with the flare triggering, is found to be failed in eruption. The location of the flare is found to coincide with the activation site of the helical twisted structures. We conclude that the activations of successive helical twists in the magnetic flux tubes/ropes plays a crucial role in the energy build-up process and triggering of M-class solar flare without a CME.
description: 22 pages, 12 figures, Accepted for Publication in Solar Physics
Spinning, sliding, flexing, and jumping of theophylline sulfate between concomitant polymorphs and hydrates
Creators: name: Spoletti, Enrico
name: Albarren Velo, Richardo
name: Phelan, Cathal
name: Williams, Cian
name: Lusi, Matteo
Publisher: name: University of Limerick
Year: 2025
Subjects: classificationCode: 34
subject: Chemical sciences
subject: FOS: Chemical sciences

description: The solid form screening of theophylline (TP) and sulfuric acid led to a collection of new crystals including two anhydrous sulfate salts (TPH+HSO4- form I and TPH+HSO4- form II) and two hydrated salts (bis-theophyllinium sulfate monohydrate ([TPH+]2SO42-·H2O) and theophyllinium hydrogen sulfate dihydrate (TPH+HSO4-·2H2O)). The new structures were determined and their stability was investigated, suggesting multiple modes of movement for the ions in the solid state. Anhydrous TPH+HSO4- form II exhibits unusually large anisotropic linear thermal expansion, associated with the elongation of a unique sulfate−π contact. Additionally, thermal dehydration of TPH+HSO4-·2H2O occurs in a salient, rocketlike manner that may be caused by the sudden release of water vapor trapped inside the particles. © 2024 The Authors. Published by American Chemical Society.
The structure, energy, and electronic states of vacancies in Ge nanocrystals
Creators: name: Bayus, Kenneth
name: Paz, O.
name: Beckman, S. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The atomic structure, energy of formation, and electronic states of vacancies in H-passivated Ge nanocrystals are studied by density functional theory (DFT) methods. The competition between quantum self-purification and the free surface relaxations is investigated. The free surfaces of crystals smaller than 2 nm distort the Jahn-Teller relaxation and enhance the reconstruction bonds. This increases the energy splitting of the quantum states and reduces the energy of formation to as low as 1 eV per defect in the smallest nanocrystals. In crystals larger than 2 nm the observed symmetry of the Jahn-Teller distortion matches the symmetry expected for bulk Ge crystals. Near the nanocrystal's surface the vacancy is found to have an energy of formation no larger than 0.5 to 1.4 eV per defect, but a vacancy more than 0.7 nm inside the surface has an energy of formation that is the same as in bulk Ge. No evidence of the self-purification effect is observed; the dominant effect is the free surface relaxations, which allow for the enhanced reconstruction. From the evidence in this paper, it is predicted that for moderate sized Ge nanocrystals a vacancy inside the crystal will behave bulk-like and not interact strongly with the surface, except when it is within 0.7 nm of the surface.
description: In Press at Phys. Rev. B
title: Personalentwicklung in KMU
title: Erarbeitung von Handlungsempfehlungen
titleType: Subtitle
Creators: name: Preimesberger, Sabine
Publisher: name: FH Vorarlberg (Fachhochschule Vorarlberg)
Year: 2021
Subjects: subject: 650 Management

description: Kleine und mittlere Betriebe sind die wichtigsten Treiber der österreichischen Wirtschaft. Damit die Unternehmen wettbewerbsfähig bleiben können, werden Mitarbeitende mit den entsprechenden Qualifikationen und Kompetenzen benötigt. Diese Masterarbeit widmet sich der Fragestellung, wie in kleinen und mittleren Betrieben mit bis zu 100 Mitarbeitenden Personalentwicklung organisiert ist und welche ergänzenden bzw. neue, innovative Ansätze sich zeigen. Nach dem zuerst die allgemeine Theorie zur Personalentwicklung dargestellt wird, wird im weiteren Verlauf auf spezielle Aspekte im Bereich KMU eingegangen. Der praxisorientierte Abschnitt wird in zwei Teile gegliedert. Im ersten Teil werden eingesetzte Maßnahmen bzw. Methoden anhand von Best-Practice-Beispielen erläutert. Singuläre Ansätze werden im zweiten Teil dieses Kapitels vertiefend beschrieben. Eine Schlussbetrachtung der Ergebnisse sowie die Erstellung von Handlungsempfehlungen für KMU runden diese Arbeit ab. Diese Masterarbeit richtet sich an Interessierte, die Personalentwicklung in kleinen und mittleren Betrieben einführen oder bereits bestehende Konzepte modernisieren und adaptieren wollen.
description: Small and medium-sized enterprises are the most important drivers of the Austrian economy. Employees with the appropriate qualifications and competencies are needed to maintain companies’ competitiveness. This Master's thesis is dedicated to the question of how human resource development is organized in small and medium-sized enterprises with up to 100 employees and which complementary or new and innovative approaches emerge. After describing the general theory of human resource development, this thesis continues by looking at specific aspects of SMEs. The practice-oriented section is divided into two parts. In the first part, applied measures and methods are explained based on best-practice examples. Singular approaches are described in more detail in the second part of this chapter. A final review of the results and the preparation of recommendations for SMEs complete this study. This Master's thesis is aimed at interested parties who want to introduce human resource development in small and medium-sized enterprises or who want to modernize and adapt already existing concepts.
Note on Custodial Symmetry in the Two-Higgs-Doublet Model
Creators: name: Grzadkowski, B.
name: Maniatis, M.
name: Wudka, Jose
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a simple and transparent method to study custodial symmetry in the Two-Higgs-Doublet Model. The method allows to formulate the basis independent, sufficient and necessary, conditions for the custodial symmetry of the scalar potential. The relation between the custodial transformation and CP is discussed and clarified.
Twisted-light-induced optical transitions in semiconductors: Free-carrier quantum kinetics
Creators: name: Quinteiro, G. F.
name: Tamborenea, P. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically investigate the interband transitions and quantum kinetics induced by light carrying orbital angular momentum, or twisted light, in bulk semiconductors. We pose the problem in terms of the Heisenberg equations of motion of the electron populations, and inter- and intra-band coherences. Our theory extends the free-carrier Semiconductor Bloch Equations to the case of photo-excitation by twisted light. The theory is formulated using cylindrical coordinates, which are better suited to describe the interaction with twisted light than the usual cartesian coordinates used to study regular optical excitation. We solve the equations of motion in the low excitation regime, and obtain analytical expressions for the coherences and populations; with these, we calculate the orbital angular momentum transferred from the light to the electrons and the paramagnetic and diamagnetic electric current densities.
description: 11 pages, 3 figures
Walking with the dead : transit, transfer, and transformation in São Paulo's devotion to souls
Creators: name: Amoruso, Michael Benjamin
name: 0000-0002-2559-5560
Publisher: name: The University of Texas at Austin
Year: 2024
Subjects: Religion
Brazil
São Paulo
Movement
Religious transit
Syncretism
Death
Spirits
Souls

description: On Mondays—widely known as “the day of the souls” in Brazil—devotees across São Paulo visit cemeteries and Catholic churches to pray to the souls of the dead. But not all practitioners are Catholic, and some are Catholic and something else too. For this reason, observers call the devotion to souls syncretic. While some scholars have criticized the term for positing essential religious forms degraded through mixture, in Brazil, it is part of the vernacular. There it is wedded to a national racial ideology that characterizes Brazilians as a mixture of Portuguese, African, and indigenous peoples. According to this logic, Brazilians mix religions because they themselves are racially mixed. This dissertation considers this devotion to souls as a vector for religious movement. Turning syncretism on its head, it attends to how souls, living and departed, move and mingle. It argues that the devotion to souls is a point of transit and transfer between realms—that is, it connects devotees to departed kin and other souls in the spiritual world—and between religious theologies, identities, and institutions. Put more plainly, it suggests that devotees move across religious boundaries, and that movement changes religious spaces.
omparing the Emergency Food Assistance Program and The Food Stamp Program: Recipient Characteristics, Market Effects, and Benefit/Cost Ratios
Creators: name: Levedahl, J. William
name: Ballenger, Nicole
name: Harold, Courtney
name: Levedahl, J. William
name: Ballenger, Nicole
name: Harold, Courtney
Publisher: name: Unknown
Year: 1994
Subjects: subject: Agricultural and Food Policy
subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Emergency Food Assistance Program (TEFAP)
subject: Food Stamp Program (FSP)
subject: commodity distribution
subject: food and nutrition programs
subject: surplus commodities

description: The Emergency Food Assistance Program (TEFAP), a commodity-based program, and the coupon-based Food Stamp Program can, for a given level of expenditure, serve more needy households than either program can serve alone. TEFAP distributes Government surpluses and purchased commodities to needy households. Although TEFAP expenditures ($300 million per year since 1989) are small compared with those of the Food Stamp Program ($23.6 billion in FY1993), a commodity-based program such as TEFAP can complement food stamps by distributing food to households unwilling to apply for food stamps because of complicated application procedures and the stigma attached to food stamps. TEFAP can also increase awareness of eligibility for food stamps and other Federal assistance. This report compares the programs’ recipients, effects on food and nonfood markets, and benefit/cost ratios.
Attachment, articulation and agency : a glimpse into the world of women digest writers in Pakistan
Creators: name: Ahmed, Kiran Nazir
Publisher: name: The University of Texas at Austin
Year: 2024
Subjects: Women fiction writers
Pakistan
Agency
Affect
Attachment
Ethnography as fiction

description: This dissertation presents an ethnographic account of women fiction writers’ engagement with digest genre and the community (of readers and writers) formed around it. Digest genre is published in Urdu monthly magazines, usually known as women’s digests. These fictional stories are extremely popular and have the highest circulation of all fictional genres in Pakistan. However, they are socially perceived as “low brow” and disavowed as having no literary merit. In this context, this ethnography traces the specific forms attachment, articulation and agency take in the lives of women whose stories resonate with many, but who also face the critique of not being authentic writers. It does so by exploring questions such as: How do digest writers develop attachments and bonds of friendship in the absence of physical proximity (since writers rarely meet each other or their readers)? How do digest writers articulate lived realities—both of attachments in the digest community and the larger dynamics of living as a woman in Pakistan’s changing social milieu? How do they see fiction writing and what role do they see it playing in their individual lives? What challenges or opportunities do writers experience as they enter the arena of script writing for television, and how do they speak back to notions of their writing as inauthentic and frivolous? Methodologically, this research draws on twenty months of fieldwork, carried out in four urban cities (Islamabad, Rawalpindi, Lahore and Karachi) and villages in two provinces (Sindh and Punjab). Fieldwork took the form of archival work, semi-structured interviews, focus group discussions, and participant observation. I closely followed the daily lives and work of digest writers of varying ages, ethnicities, and educational backgrounds. In addition, I conducted work with editors (who select and tailor digest narratives), admins (volunteers who manage readers’ groups through social media), readers and voluntary non-readers (individuals who are familiar with this genre but choose not to read it), television channel heads (who employ digest writers as script writers) and content managers at production houses (who select and tailor digest narratives for television audiences).
Photonic Band Gap Effects in Two-dimensional Polycrystalline and Amorphous Structures
Creators: name: Yang, Jin-Kyu
name: Schreck, Carl F.
name: Noh, Heeso
name: Liew, Seng-Fatt
name: Guy, Mikhael I.
name: O'Hern, Corey S.
name: Cao, Hui
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study numerically the density of optical states (DOS) in two-dimensional photonic structures with short-range positional order, and observe a clear transition from polycrystalline to amorphous photonic systems. In polycrystals, photonic band gaps (PBGs) are formed within individual do- mains, which leads to a depletion of the DOS similar to that in periodic structures. In amorphous photonic media, the domain sizes are too small to form PBGs, thus the depletion of the DOS is weakened significantly. The critical domain size that separates the polycrystalline and amorphous regimes is determined by the attenuation length of Bragg scattering, which depends not only on the degree of positional order but also the refractive index contrast of the photonic material. Even with relatively low refractive index contrast, we find that modest short-range positional order in photonic structures enhances light confinement via collective scattering and interference.
description: 20 pages, 10 figures
Some noteworthy alternating trilinear forms
Creators: name: Draisma, Jan
name: Shaw, Ron
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 15A69, 15A72, 51E20

description: Given an alternating trilinear form T on the V=F^n let L_T denote the set of T-singular lines in the projective space PV. These are all lines for which the linear form T(a,b,.) is identically zero. Amongst the immense profusion of different kinds of T we single out a few which we deem noteworthy by virtue of the special nature of their set LT.
Interactive roles of core clock components and histone methyltransferases in circadian chromatin regulation in Arabidopsis
Creators: name: Huang, Tien-Yu
name: 0000-0002-9063-7544
Publisher: name: The University of Texas at Austin
Year: 2017
Subjects: Circadian
Clock
Histone

description: The importance of circadian clock function has been demonstrated in almost all organisms examined to date. Despite divergences in oscillator components, a chromatin-dependent mechanism of clock gene regulation appears to be common in the circadian system among different organisms. Previous studies have shown that rhythmic expression of core clock components correlates with circadian oscillations of active chromatin markers at the promoters. In this study, we investigate the time-dependent pattern of activating chromatin marks H3K4me3 and H3K9ac on a genomic scale to identify genes with a circadian chromatin profile in Arabidopsis. We found that about one fourth of loci with H3K4me3 occupancy or H3K9ac occupancy showed a rhythmic chromatin oscillation. We further identified that the H3K4me3 methyltransferases Arabidopsis Thaliana Trithorax Protein 1 (ATX1) and the Arabidopsis ASH1 HOMOLOG 2 (ASHH2) are subjected to clock control. In addition, ASHH2 was shown to be a novel regulator of core clock genes. Our findings propose a functional link between core clock regulators and temporal modification of activating chromatin marks in plant.
Escuelitas and children's literature of Texas
Creators: name: Barragán Goetz, Philis M.
Publisher: name: The University of Texas at Austin
Year: 2016
Subjects: Mexican American studies
Education
Childhood

description: Between 1880 and 1930, ideas around inclusion and exclusion in American society often revolved around the increasing importance of language and citizenship. Within this context, ethnic Mexicans’ relationship to education—their enrollment in the public school system, as well as in escuelitas—provided a means for both resisting and complying with the dominant United States society’s demands for a linguistically homogenous populace. The escuelitas’ proliferation during various time periods points to an unfulfilled need, and likewise, their decline signals their growing irrelevance amongst the ethnic Mexican population. Essentially, their existence—their rises and their falls— points to junctures of ethnic Mexican cultural negotiation. This dissertation examines the proliferation and decline of escuelitas in the context of the expansion of the public school system, modernization, progressivism, and the Mexican Revolution. Mapping escuelitas’ vicissitudes against the backdrop of these historical developments also maps the role of education in the transformation of how Texas Mexicans became Mexican Americans.
title: ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð¾Ð´ÑÑÐ°Ð½ÑÐ¸Ð¸ 110/35/10 ÐºÐ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Design of substation110/35/10 kV
Creators: name: ÐÐ¼Ð°Ðº, ÐÐ»Ð¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³ÐµÑÐ¸ÐºÐ°
ÑÐ»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾Ð´ÑÑÐ°Ð½ÑÐ¸Ð¸
Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
Ð²ÑÐ±Ð¾Ñ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ
Ð²ÑÐ±Ð¾Ñ Ð¸Ð·Ð¼ÐµÑÐ¸ÑÐµÐ»ÑÐ½ÑÑ ÑÑÐ°Ð½ÑÑÐ¾ÑÐ¼Ð°ÑÐ¾ÑÐ¾Ð²
electricity
electric substations
design
equipment selection
choise of gauging transformers

description: Ð ÑÐ°Ð±Ð¾ÑÐµ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¾ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ°ÑÑÐ¸ Ð¿Ð¾Ð´ÑÑÐ°Ð½ÑÐ¸Ð¸ 110/35/10 ÐºÐ. ÐÑÐ±ÑÐ°Ð½Ð° ÑÑÑÑÐºÑÑÑÐ½Ð°Ñ ÑÑÐµÐ¼Ð°, ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½Ñ ÑÐ¾ÐºÐ¸ ÐºÐ¾ÑÐ¾ÑÐºÐ¾Ð³Ð¾ Ð·Ð°Ð¼ÑÐºÐ°Ð½Ð¸Ñ, Ð²ÑÐ±ÑÐ°Ð½Ð¾ Ð¾ÑÐ½Ð¾Ð²Ð½Ð¾Ðµ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿Ð¾Ð´ÑÑÐ°Ð½ÑÐ¸Ð¸, ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° Ð³Ð»Ð°Ð²Ð½Ð°Ñ ÑÑÐµÐ¼Ð° ÑÐ»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ð¹.
description: In this work the designing of the electrical scheme of substation 110/35/10 kV was done. The structural scheme was chosen, the short circuit currents were calculated, after that the main equipment was chosen and the main electrical scheme produced.
The unbalancing act : proxy preservation for censorship resistance systems
Creators: name: Spacek, Jodi
Publisher: name: University of British Columbia
Year: 2019

description: Internet censorship is a form of digital authoritarianism in certain countries that restrict access to the internet. Internet freedom, to a degree, is possible even in these countries by means of proxies maintained outside of the censor's boundaries. These proxies can be compromised by censors who pose as legitimate users to discover proxies. Censors are powerful adversaries and may block access to any proxy once they know about it. We propose a novel technique to address the proxy distribution problem in this thesis. We introduce the needle algorithm that preserves proxies by limiting their distribution. We show that it is a useful mechanism for both preserving proxies and maintaining client service under a censorship threat model. We examine characteristics of the needle algorithm in a simulation. Three measures are important under the censorship threat model; the enumeration or discovery of all proxies, load balancing guarantees, and the collateral damage of innocent bystanders. We compare the results of these experiments with two well-known algorithms, uniform random and power of 2 choices, as well as Tor's bridgedb proxy assignment mechanism.
The stability of a crystal with diamond structure for patchy particles with tetrahedral symmetry
Creators: name: Noya, Eva G.
name: Vega, Carlos
name: Doye, Jonathan P. K.
name: Louis, Ard A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The phase diagram of model anisotropic particles with four attractive patches in a tetrahedral arrangement has been computed at two different values for the range of the potential, with the aim of investigating the conditions under which a diamond crystal can be formed. We find that the diamond phase is never stable for our longer-ranged potential. At low temperatures and pressures, the fluid freezes into a body-centred-cubic solid that can be viewed as two interpenetrating diamond lattices with a weak interaction between the two sublattices. Upon compression, an orientationally ordered face-centred-cubic crystal becomes more stable than the body-centred-cubic crystal, and at higher temperatures a plastic face-centered-cubic phase is stabilized by the increased entropy due to orientational disorder. A similar phase diagram is found for the shorter-ranged potential, but at low temperatures and pressures, we also find a region over which the diamond phase is thermodynamically favored over the body-centred-cubic phase. The higher vibrational entropy of the diamond structure with respect to the body-centred-cubic solid explains why it is stable even though the enthalpy of the latter phase is lower. Some preliminary studies on the growth of the diamond structure starting from a crystal seed were performed. Even though the diamond phase is never thermodynamically stable for the longer-ranged model, direct coexistence simulations of the interface between the fluid and the body-centred-cubic crystal and between the fluid and the diamond crystal show that, at sufficiently low pressures, it is quite probable that in both cases the solid grows into a diamond crystal, albeit involving some defects. These results highlight the importance of kinetic effects in the formation of diamond crystals in systems of patchy particles.
description: 15 pages, 13 figures
Changing Structure of U.S. Dairy Farms
Creators: name: Perez, Agnes M.
name: Perez, Agnes M.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Livestock Production/Industries
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Dairy
subject: structure
subject: milk production
subject: large farms
subject: small farms
subject: milk cow inventories
subject: farm numbers

description: Large dairy farms (with 100 or more milk cows) housed nearly half of the U.S. dairy herd in 1993. These large dairies represented just 13.6 percent of all U.S. farms with milk cows, but they were responsible for about 50 percent of total milk production. Farms with fewer than 30 milk cows have declined in both number and share of all farms with milk cows continuously since 1977. Farms with 30-49 milk cows also have declined in number, but their share of all farms with milk cows gradually increased until 1990, and then began a slow decline. Farms with 50 or more milk cows have increased in recent years, with farms having 100 or more milk cows increasing most in both number and share of all farms with milk cows. The largest farms are also increasing most in the West and Southwest. The traditional milk-producing States of the Northeast and Lake States have seen their share of milk production become stable and then decline in recent years.