cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modified DMRG algorithm for the zigzag spin-1/2 chain with frustrated antiferromagnetic exchange: Comparison with field theory at large $J_2/J_1$
Creators: name: Kumar, Manoranjan
name: Soos, Zoltan G.
name: Sen, Diptiman
name: Ramasesha, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A modified density matrix renormalization group (DMRG) algorithm is applied to the zigzag spin-1/2 chain with frustrated antiferromagnetic exchange $J_1$, $J_2$ between first and second neighbors. The modified algorithm yields accurate results up to $J_2/J_1 \approx 4$ for the magnetic gap $Δ$ to the lowest triplet state, the amplitude $B$ of the bond order wave (BOW) phase, the wavelength $λ$ of the spiral phase, and the spin correlation length $ξ$. The $J_2/J_1$ dependences of $Δ$, $B$, $λ$ and $ξ$ provide multiple comparisons to field theories of the zigzag chain. The twist angle of the spiral phase and the spin structure factor yield additional comparisons between DMRG and field theory. Attention is given to the numerical accuracy required to obtain exponentially small gaps or exponentially long correlations near a quantum phase transition.
description: 7 pages, 8 figures, submitted to PRB
title: Effects of a Wildfire on Seed Rain and Soil Seed Reserve Dynamics of a Good Condition Sagebrush-Grass Rangeland in Central Utah
Creators: name: Hassan, Mohamed Ali
Publisher: name: Utah State University
Year: 1983

description: The objectives of this research were to investigate the ecological importance of soil seed reserves and seed rain on regeneration of a good condition sagebrush- grass range vegetation after a wildfire and draw conclusions leading to better understanding and management of such ecosystems. Investigations were conducted for two successive years on a community where major plants were neither rhizomatous nor sprouting. In such cases soil seed reserves and seed rain have to be the main source of regeneration. In addition to monitoring soil seed reserves and seed rain, vegetation changes during the past two years and the historical conditions of the study area were examined.
Study of germinable soil seed reserve dynamics showed that fire can have a destructive effect on this portion of the community. Cheatgrass soil seed reserves were high even in good condition sagebrush-grass vegetation. Although fire reduced the Bromus tectorum seed bank by half, the cover of this grass increased to almost twice the level observed on the control (unburned) plots a year later. This shows the enormous reproductive capacity of this highly competitive weed species following a wildfire.
Even though the pre-burn vegetation contained a high proportion of native perennial plants, soil seed reserves and seed rain had very small proportions of their germinable seeds.
Timing of the fire is likely important in controlling undesirable range plants and their seeds. Had the fire occurred earlier when more seeds were attached to the culms, greater reduction in cheatgrass probably would have been obtained. Timing of the fire was just right to control sagebrush, because it occurred before their seed set and complete destruction of this species was achieved. Mormon tea was the only shrub to reestablish its cover relatively rapidly. This was related to its strong ability to sprout from root crowns.
Greater germinable soil seed reserves were found under shrub canopies than in the inter spaces. This is probably related to the semi-logarithmic dispersal of seed where seed fall is greatest closest to mother plants (Harper 1977). Since flammable fuel follows the same pattern, it was found that fire has a serious impact on soil seed reserves at "hot" points, but temperatures were apparently not hot enough to cause much damage on seed banks at "cold" points in the former interspaces.
Since soil seed reserves accumulate in significantly higher proportions in the surface 0-2 cm, fire has a more serious impact on the seeds in surface soil than those lower lower down.
Variance of the germinable seed rain was so high that none of the grand totals, life forms totals and species values were statistically significant at alpha
DIFFERENTIAL IMPACTS OF EXCHANGE RATE FLUCTUATIONS ON TRADE BALANCE AND ECONOMIC OUTPUT
Creators: name: Raden Parianom
name: Kery  Utami
name: Siti Hidayati
Publisher: name: Zenodo
Year: 2024
Subjects: Exchange Rate Fluctuations, Trade Performance, Economic Growth, ASEAN, NARDL (Non-Linear Autoregressive Distributed Lag), Long-Term Relationship.

description: Abstract

This study investigates the asymmetric influences of exchange rate fluctuations on trade performance and economic growth within eight of ASEAN's largest economies over a comprehensive period spanning from 1970 to 2019. Employing the non-linear autoregressive distributed lag (NARDL) methodology, the empirical analysis confirms a long-term equilibrium relationship among exchange rates, trade dynamics, and output trajectories. The findings reveal distinct short-term and long-term responses to currency movements across countries. While ASEAN experienced short-term trade and output boosts from both currency appreciation and depreciation, Singapore witnessed the opposite. Indonesia and Malaysia exhibited improved short-term trade and growth following currency appreciation, but long-term trends favored depreciation. Cambodia and Vietnam displayed similar patterns, except for a marginally negative short-term trade impact from currency depreciation. Overall, the study indicates that both currency appreciation and depreciation have adverse effects on long-term trade balances across most ASEAN nations, although depreciation often stimulates short-term trade. Similarly, currency depreciation tends to positively influence short-term growth, whereas appreciation generally has a negative impact. Based on these results, the study concludes with policy recommendations tailored to the continent's specific economic conditions.
title: Homeless Social Service Workers as Street-Level Bureaucrats
Creators: name: Smith, Curtis
Publisher: name: Utah State University
Year: 2018

description: Social service outreach workers serving homeless populations exemplify what Michael Lipsky calls street-level bureaucrats (SLBs) who exercise discretionary power in the performance of their professional roles. This dissertation draws on over 200 hours of ethnographic fieldwork in an urban center in the Mountain West to examine the challenges faced by homeless outreach workers and case managers in serving the needs of homeless clients and the practices they use to manage those challenges. Using a grounded theory analysis of participant observation and interview data, this dissertation focuses on what is termed “aggressive advocacy” in which social service SLBs creatively and actively pursue work arounds and solutions to potential barriers to homeless services for their clients. The analytic concept of “fitting stories” is used to describe the ways in which SLBs assist their clients in developing service-worthy narratives. They implement the Service Prioritization Decision Assistance Tool in ways that probe clients’ conditions and experiences to capture potentially missed vulnerabilities and enhance service-eligible vulnerability scores. Homeless SLBs also invoke discretionary power in negotiating with other agency gatekeepers and landlords, and they may go beyond their official job descriptions to spend time helping homeless clients who are resistant to services or at risk of losing them. In each of these aggressive advocacy activities, homeless SLBs demonstrate discretionary power in supporting their clients and fulfilling their agencies’ mission to serve homeless clients. Several implications of these findings for better understanding social services for the homeless are addressed as well as the broader implications of this study for understanding street-level bureaucracy more generally.
EXPLORING THE COGNITIVE IMAGE OF A TOURISM DESTINATION
Creators: name: Stylos, Nikolaos
name: Andronikidis, Andreas
Publisher: name: tourismos
Year: 2021

description: This paper explores and evaluates the structure of the cognitive component of tourism destination image. The empirical study is operationalized in a sun-andsand tourism destination of a Greek region. Given the reported multidimensionality of the construct, and the critic on the psychometric properties of previously defined scales measuring tourism destination image, this study examines the applicability of a new scale and provides empirical evidence to propose an alternative component structure for the formation of cognitive tourism destination image. Our analysis suggests four image dimensions: (1) must-be conditions (2) attractive conditions, (3) appealing activities, and (4) natural environment. Implications are discussed.
description: tourismos, Vol. 8 No. 3 (2013)
IMAGE COMPONENTS OF NIGHTLIFE-CLUBBING DESTINATIONS
Creators: name: Kamenidou, Irene
name: Mamalis, Spyridon
name: Kokkinis, George
name: Geranis, Christos
Publisher: name: tourismos
Year: 2013

description: This study explored 141 British tourists’ perception of Kavos’ Corfu as a destination. It measured the components of Kavos’ destination image. Data was collected with an aided self –completion questionnaire and data analysis included descriptive statistics (frequencies, percentages and means), reliability, and factor and cluster analysis. 18 destination components were rated on a 5-point Likert scale and continuously factor analyzed, producing 4 factors and accounting for 80.7% of the total variance. Segmentation based on factors produced 3 segments with N=32; 50 and 59 British tourists respectively and with Final Cluster Centers ranging from 3.03 to 4.60. This research has contributed to the theoretical gap of the tourism industry literature regarding destination image formation in the Mediterranean and specifically Greece. These results can be used as a basis for destination improvement and strategy formation.
description: tourismos, Vol. 8 No. 3 (2013)
title: The Effects of Noncontingent Reinforcement with Signals on Problem Behavior in the Classroom Setting
Creators: name: Pozulos, Jannica
Publisher: name: Utah State University
Year: 2018

description: Research has shown noncontingent reinforcement (NCR) to be an effective intervention in reducing inappropriate behavior (i.e., problem behavior) when implemented prior to its occurrence in both clinical and applied settings. Some research suggests problem behavior of teenagers and adults with disabilities may be reduced at greater rates when NCR is implemented in combination with signals (e.g., visual timers). Additional research is warranted to investigate if the positive effects of NCR can be enhanced using signals when working with young children with autism. This study evaluated the effects of NCR when implemented with and without a visual timer on the problem behavior of three preschoolers with autism attending a special education day treatment program. All interventions were implemented by classroom staff during typical learning activities. Overall results were inconsistent in determining if NCR with signals may be an effective intervention for reducing problem behavior of preschoolers with autism. However, results suggest NCR with signals may contribute to a reduction in problem behavior for some preschoolers with autism. Additional research will be needed to verify these tentative conclusions.
title: Chronic Migraines and Couples: A Grounded Theory of Adaptation to Chronic Migraines for Patients and their Partners
Creators: name: McPhee, Douglas P.
Publisher: name: Utah State University
Year: 2018

description: This study was completed to better understand and treat couples wherein one partner suffers from chronic migraines. I interviewed eight couples about their experiences in dealing with migraines as a patient, as a partner, and together. The interviews were transcribed and analyzed by a team of seven researchers. We developed a theory that can be used to understand how patients and their partners adapt to chronic migraines. The theory was grounded in the experiences of the patients and partners who were interviewed. We found that patients and partners alike dealt with burdens and costs associated with chronic migraines. Coping, healthcare, couple experience, and identity were found to be the means through which patients and partners adapted to their burdens. These concepts are broken down and discussed in greater detail. A model is provided that can be used to create a visual representation of how well a couple deals with migraines. Suggestions for couples who are dealing with chronic migraines, and for medical providers and therapists who work with couples affected by chronic migraines, are provided.
title: tourismos, Vol. 8 No. 3 (2013)
Creators: name: Tourismos
Publisher: name: University of the Aegean
Year: 2013

description: From Heritage to Terrorism: Regulating Tourism in An Age of Uncertainty...165-169 EXPLORING BRAND CONFUSION THROUGH HOTEL ADVERTS...151-163 POSITIONING AND BRANDING A WILDERNESS TOURIST ATTRACTION TO MEET ALL STAKEHOLDERS OBJECTIVES...129-150 FROM E-BUSINESS TO C-COMMERCE: COLLABORATION AND NETWORK CREATION FOR AN E-MARKETING TOURISM STRATEGY...113-128 IMAGE COMPONENTS OF NIGHTLIFE-CLUBBING DESTINATIONS...99-111 EXPLORING THE COGNITIVE IMAGE OF A TOURISM DESTINATION...77-97 PUBLIC SECTOR ALLIANCES IN MARKETING URBAN HERITAGE TOURISM: A POST-COMMUNIST PERSPECTIVE...59-76 TOURISM PROPERTY ACQUISITION IN SOUTH AFRICA: A DESTINATION MARKETING ANALYSIS...39-57 INTENTIONS TO BOYCOTT “UNETHICAL” HOTELS: A CONJOINT ANALYSIS...21-37 STOCK-OPTION-BASED EXECUTIVE COMPENSATION PLANS AND LODGING FIRMS’ RISK-TAKING...1-20 Initial Pages & Editorial...i-xv
Avoiding a pair of patterns in multisets and compositions
Creators: name: Jelínek, Vít
name: Mansour, Toufik
name: Ramírez, José L.
name: Shattuck, Mark
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05A05 (Primary), 05A15 (Secondary)

description: In this paper, we study the Wilf-type equivalence relations among multiset permutations. We identify all multiset equivalences among pairs of patterns consisting of a pattern of length three and another pattern of length at most four. To establish our results, we make use of a variety of techniques, including Ferrers-equivalence arguments, sorting by minimal/maximal letters, analysis of active sites and direct bijections. In several cases, our arguments may be extended to prove multiset equivalences for infinite families of pattern pairs. Our results apply equally well to the Wilf-type classification of compositions, and as a consequence, we obtain a complete description of the Wilf-equivalence classes for pairs of patterns of type (3,3) and (3,4) on compositions, with the possible exception of two classes of type (3,4).
description: 26 pages
THE ROLE OF PUBLIC PRIVATE PARTNERSHIP ON STRENGTHENING THE HEALTH SYSTEMS IN DEVELOPING COUNTRIES - THE CASE OF KOSOVO AND ALBANIA
Creators: name: Naser Rugova
name: Besmira Manaj
name: Martin Henze
Publisher: name: Zenodo
Year: 2024
Subjects: Public-Private Partnerships, Healthcare, Developing Countries, Kosovo, Albania, Health Systems.

description: Abstract

Intoduction - Low- and middle-income countries in the Western Balkans Region that continue to go through challenging periods of political and socio-economic transition face similar challenges in their capacity to improve population health. Kosovo and Albania continue to face such challenges, of the nature of inadequate policies, infrastructure in the public sector, stable financing and the lack of necessary capacities to provide quality health services that meet the needs of citizens. Lack of Health Information System in the health system of Kosovo and largely in the whole territory of Albania, inadequate health infrastructure, out-of-pocket payments of about 40%, lack of modern health equipment and technology and long waits for specific treatments at any level where solutions are mostly not provided, impose pragmatic solutions with affordable costs on the part of decision-making institutions in both countries. The beginning of the implementation of this new approach and technical-managerial platform Public Private Partnership (PPP) in some sectors of the health systems of both countries is being seen as an alternative which might neutralize these challenges of the health systems of both countries. Aim - of this paper is to make a comprehensive analysis considering the impact of the application of PPPs in the health sector of the two countries for strengthening, raising the quality and reforming process according to the contemporary trends of the health systems in both countries. Research methodology - is based on a mixed approach, using a qualitative method and semi-structured interviews with managers of different health system institutions as research tools, as well as the comparative method for both countries and specific sectors of the health systems at the secondary and tertiary levels of the sector. Results - from the findings of this research, it results that in some specific sectors of the health systems of both countries, the application of PPPs is seen as a real and necessary solution when it is well managed andimplemented in raising the quality of health services and protecting patients from financial risk. Conclusions - we estimate that the application of PPPs in a certain sector of the health systems of both countries strengthens the health systems, raises the quality of health services, reduces costs and reduces the financial risk for patients but it has to be managed correctly.
Applications of computational geometry to the molecular simulation of interfaces
Creators: name: Usabiaga, Florencio Balboa
name: Duque, Daniel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The identification of the interfacial molecules in fluid-fluid equilibrium is a long-standing problem in the area of simulation. We here propose a new point of view, making use of concepts taken from the field of computational geometry, where the definition of the "shape" of a set of point is a well-known problem. In particular, we employ the $α$-shape construction which, applied to the positions of the molecules, selects a shape and identifies its boundary points, which we will take to define our interfacial molecules. A single parameter needs to be fixed (the "$α$" of the $α$-shape), and several proposals are examined, all leading to very similar choices. Results of this methodology are evaluated against previous proposals, and seen to be reasonable.
description: 22 pages, 8 figures
title: Contextual Factors in the Identity Development of Native American and Latinx Undergraduates in STEM Fields
Creators: name: Enno, Angela Marie
Publisher: name: Utah State University
Year: 2018

description: This study includes two papers that aimed to provide insights into the experiences of high-achieving Latinx and Native American college students studying science. We wanted to better understand factors that influence these students’ ability to develop a sense of identity that weaves together their hoped-for careers as scientists as well as their cultural identities. We looked at how they feel about working with mentors in science fields who were like them in a variety of ways. We found that many students (especially those with a stronger sense of cultural identity) valued working with mentors who were similar to them in demographic characteristics; but overall, the whole group of students agreed that the most important areas of similarity in their opinions were their values and thoughts about how to interact with other people. Students who felt they were similar to their mentors on demographic characteristics were also more likely to believe they were similar in values and ways of interacting. We also examined identity development in three different aspects: ethnic identity, scientist identity, and combining the two into one identity that incorporates being a Native American scientist or a Latinx scientist. We found that the students in this study may find it difficult at times to develop a strong sense of their identity that weaves together both parts of themselves without favoring one over the other, and without seeing the two identities as separate or conflicting. At the same time, we found that when mentors do behave in ways that are more similar with students’ ways of interacting, those students develop a stronger sense of themselves as scientists, and when students have a stronger sense of themselves as scientists, they are more likely to commit to their education. We suggest that people working with Native American and Latinx college students studying science should work on understanding those students’ cultural backgrounds and find ways to relate with them, in order to make it more likely that those students will finish school and choose to continue with a career in science.
Applying different angular ordering constraints and $k_t$-factorization approaches to the single inclusive hadron production in the $e^+e^-$ annihilation processes
Creators: name: Modarres, M.
name: Taghavi, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the differential cross section of the single inclusive $e^+e^-$ annihilation to the hadrons via $γ$-production, in the different ${k_{t}}$-factorization frameworks. In order to take into account the transverse momenta of the incoming partons, for the first time, we apply the Kimber et al (KMR) method to calculate the unintegrated parton fragmentation functions (UFFs) from the ordinary integrated one, i.e., the parton fragmentation functions (FFs), which satisfy the similar DGLAP evolution equations, such as those of parton distribution functions (PDFs). Also, by utilizing the different angular ordering constraints the results corresponding to the Martin et al (MRW) in the leading order (LO) and the next-to-leading-order (NLO) are obtained. The LO sets of DSS library for the input FFs is used. The numerical results are compared with the experimental data in the different energies which are reported by the different collaborations, such as TASSO, AMY, MARK II, CELLO, DELPHI, SLD, ALEPH and Belle with the other QCD+fragmentation models such as Pythia 6.4 and 8.2 parton showers. The behaviors of the normalized differential cross sections and the multiplicity versus the "transverse momentum" ($p_\bot$) are discussed. The final results demonstrate that the KMR and MRW UFFs give a good description of data and there is not much significant difference between the above three schemes. On the other hand, our results become closer to the data for the lower values of $p_\bot$ and the higher values of center of mass energies.
description: Phys.Rev. D to accepted for publication
USING INTERACTIVE METHODS IN TEACHING MATHEMATICS
Creators: name: Auezbaeva, Gulayim
Publisher: name: Zenodo
Year: 2024

description: This article explores the implementation of interactive methods in mathematics teaching and their potential to improve student engagement, understanding, and problem-solving skills. Traditional teaching methods often fail to fully engage students in the learning process, particularly in mathematics, where abstract concepts can be challenging to grasp. Interactive methods, such as problem-based learning, collaborative learning, the Socratic method, and technology-enhanced learning tools, offer a more dynamic and student-centered approach. Grounded in educational theories like constructivism, social development theory, and experiential learning, these methods encourage active participation, critical thinking, and collaboration.
title: Papel de la radiología en el estudio de la enfermedad tiroidea en pediatría
Creators: name: Taboada Rodriguez, Vanesa
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neoplasia
subject: Endocrine disorders
subject: Congenital
subject: Education
subject: Ultrasound-Colour Doppler
subject: MR
subject: Thyroid / Parathyroids
subject: Paediatric
subject: Head and neck

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Conocer la anatomía tiroidea radiológica normal en niños Exponer los principales hallazgos radiológicos de las anomalías de desarrollo,
la patología nodular benigna y maligna y la enfermedad difusa del tiroides Revisar los criterios...
title: Lesiones Deportivas de la Extremidad Inferior en el Niño y Adolescente.
Creators: name: García de Pereda De Blas, Verónica
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: MR
subject: Ultrasound
subject: Conventional radiography
subject: Extremities
subject: Musculoskeletal soft tissue
subject: Paediatric

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Revisar los hallazgos radiológicos de las lesiones deportivas más frecuentes en niños y adolescentes centrándonos en las que afectan a la extremidad inferior,
excluyendo las fracturas traumáticas...
title: Growth Characteristics of Lactobacillus Wasatchensis and Its Detection and Enumeration Using Quantitative Polymerase Chain Reaction
Creators: name: Bowen, Isaac Brockbank
Publisher: name: Utah State University
Year: 2018

description: There are numerous challenges encountered during the manufacturing and storage of cheese by both the large-scale and artesian producers. One such challenge has been the formation of late gassy defect, which occurs when gas is produced by certain lactic acid bacteria found in the cheese block during storage and aging over a three month time period. Negative consequences of late gas production are slits and cracks in the cheese block and puffy cheese packaging, which cause significant financial losses for manufacturers along with poor consumer acceptance.
Lactobacillus wasatchensis is one such lactic acid bacterium shown to produce gas during cheese storage. This bacterium has now been found in cheese samples exhibiting late gas defect in the Midwest and Western states. The goal of this study was to further characterize and understand the growth attributes of Lb. wasatchensis, and thereby gain some understanding on how it enters the cheese vats and if there are possible ways to limit or inhibit its subsequent growth. An additional goal was to determine if we could effectively extract Lb. wasatchensis DNA from cheese samples and visualize using the qPCR molecular technique. If possible, this detection method would allow a faster and more sensitive approach to determining if Lb. wasatchensis is present in cheese blocks, which would help manufacturers know how long they should age their cheeses.
It was discovered that Lb. wasatchensis does not survive processing through an industrial heat exchanger and therefore must be entering the cheese vats by other means such as: cross-contamination, biofilm formation or aerosolizing. We also showed growth of Lb. wasatchensis is limited at an increased salt-in-moisture ratio in cheese. Additionally, we found that Lb. wasatchensis DNA can be extracted from cheese and visualized using qPCR, although further experimentation is needed to optimize this method.
title: Development and Application of a Reverse Genetics System for Zika Virus
Creators: name: Frank, Jordan C.
Publisher: name: Utah State University
Year: 2018

description: Zika virus (ZIKV) has emerged in many regions of the world, with infection outcomes spanning from no apparent illness to crippling nervous system disease. ZIKV and its close relatives, West Nile virus, Japanese encephalitis virus, dengue virus, and yellow fever virus are primarily transmitted by mosquitoes. Three ZIKVs were selected: MR-766 (Uganda, 1947), P6-740 (Malaysia, 1966), and PRVABC-59 (Puerto Rico, 2015), whose place of origin and time of isolation differ substantially. Stable, complementary DNA (cDNA) copies of the three ZIKV RNA genomes were cloned to examine the significance of viral and host genetic variations in directing ZIKV infection outcomes. Using a new toolbox for ZIKV genome engineering and protein analysis, combined with various cell culture and mouse infection model systems, the following were determined: (1) Genome-wide landscape of viral gene products and their related species, with several immuno-reactive gene products identified in the case of all three cloned ZIKVs. (2) Viral replicability in cultured cells, varied significantly depending on the virus strain and host cell type, with one cow cell line being resistant to ZIKV infection. (3) Virus induced neurological disease in mice, differed dramatically depending on the virus dose and strain, mouse age and strain, route of infection, and presence or absence of immune system components. Overall, the findings demonstrate the impact of the viral and host genetic backgrounds on the ability of ZIKV to replicate and cause disease. The ZIKV strain-specific characterizations and molecular instruments described will provide multiple avenues for developing and testing medical countermeasures.
title: Additively-Manufactured Hybrid Rocket Consumable Structure for CubeSat Propulsion
Creators: name: Chamberlain, Britany L.
Publisher: name: Utah State University
Year: 2018

description: Three-dimensional, additive printing has emerged as an exciting new technology for the design and manufacture of small spacecraft systems. Using 3-D printed thermoplastic materials, hybrid rocket fuel grains can be printed with nearly any cross-sectional shape, and embedded cavities are easily achieved. Applying this technology to print fuel materials directly into a CubeSat frame results in an efficient, cost-effective alternative to existing CubeSat propulsion systems. Different 3-D printed materials and geometries were evaluated for their performance as propellants and as structural elements. Prototype "thrust columns" with embedded fuel ports were printed from a combination of acrylonitrile utadiene styrene (ABS) and VeroClear, a photopolymer substitute for acrylic. Gaseous oxygen was used as the oxidizer for hot-fire testing of prototype thrusters in ambient and vacuum conditions. Hot-fire testing in ambient and vacuum conditions on nine test articles with a combined total of 25 s burn time demonstrated performance repeatability. Vacuum specific impulse was measured at over 167 s and maximum thrust of individual thrust columns at 9.5 N. The expected ΔV to be provided by the four thrust columns of the consumable structure is approximately 37 m/s. With further development and testing, it is expected that the consumable structure has the potential to provide a much-needed propulsive solution within the CubeSat community with further applications for other small satellites.
QCD $θ$-vacuum in a Uniform Magnetic Field
Creators: name: Adhikari, Prabal
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the $θ$-vacuum of QCD using two-flavor chiral perturbation theory ($χ$PT) in the presence of a uniform, background magnetic field calculating the magnetic field-dependent free energy density, the topological density, the topological susceptibility and the fourth cumulant at one-loop order. We find that the topological susceptibility is enhanced by the magnetic field while the fourth topological cumulant is diminished at weak fields and enhanced at larger fields when $θ=0$. However, in the QCD vacuum with $θ\neq 0$, the topological susceptibility can be either monotonically enhanced or diminished relative to their $θ$-vacuum values. The fourth cumulant also exhibits monotonic enhancement or suppression except for regions of $θ$ near $0$ and $2π$, where it is both diminished and enhanced. Finally, the topological density is enhanced for all magnetic fields with its relative shift being identical to the relative shift of the up and down quark condensates in the $θ$-vacuum.
description: 18 pages, 5 figures
title: Primeros pasos: Guía esencial de tomosíntesis
Creators: name: Rocha Garcia, Ana Maria
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Mammography
subject: Breast

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Correlación de los hallazgos mamográficos en estudios de rutina y pacientes remitidos por nódulo palpable con los hallazgos en el estudio de tomosíntesis complementario Fig....
title: Supporting Students with Autism Spectrum Disorder in Post-Secondary Education Settings: Common Barriers and Needed Accommodations and Supports
Creators: name: Paskins, Ryan T.
Publisher: name: Utah State University
Year: 2018

description: Students with Autism Spectrum Disorder (ASD) are enrolling in colleges and universities at an increasing rate. Although there is greater attendance in PSE settings, the graduation rate of this population is below the standard average. Improved services to help these students achieve their college and university goals are needed. Disability service professionals provide services to these students, yet oftentimes are not prepared to do so. In an effort to take a step toward addressing this concern, the current study began the exploratory process of identifying whether services provided by campus disability resources centers (DRC) align with the best practices that enhance the success of students with ASD.
The current study began by asking an expert panel consisting of disability service professionals to develop and agreed upon a list of (a) barriers in providing academic accommodation (b) individual and systemic barriers faced by the student, and (c) supports that can help reduce these barriers. The final instrument identified 34 barriers to providing academic accommodation, 47 systemic barriers, and 37 individual barriers students with ASD experience in PSE settings. Additionally, DRC counselors identified 45 supports and services that would help address the identified barriers. Results of the study were discussed in the context of the literature related to identifiable barriers that prevent success in PSE settings as well as supports and services that can best benefit student with ASD. Additionally, implications, limitations, and recommendations for future research were discussed.
VITALISE D2.4 Standard Version 3
Creators: name: Petsani Despoina
name: Petronikolou  Silia
name: Santonen Teemu
name: Kehayia Eva
name: Azevedo Nancy
name: Makroglou Lina
name: Leidy, Vanessa
name: Anagnostopoulou Alexandra
name: Konstantinidis Evdokimos
Publisher: name: Zenodo
Year: 2022

description: Although Living Labs have emerged as resilient research and innovation infrastructures and have proved to be a “key” to the integration of research and innovation processes in real-life settings, they still fail to provide and function according to unified and harmonized processes that are easily accessible and exploitable by academic and industry researchers. Towards this end, VITALISE aims to create the first Harmonization guidelines for Living Labs that will facilitate the access of researchers to the provided infrastructures. This document presents the work performed for the Harmonization of the way Living Labs work for the third semester of VITALISE. Taking as a starting point the work performed for the Standard v0.1 and the Standard v.02, VITALISE conducted several Harmonization activities with consortium partners and external stakeholders in order to create the Standard v0.3 presented in this document. Standard v0.1 included the state of the art information about Living Labs in the VITALISE consortium and was the first deliverable that set up the structure of the VITALISE Standards. Standard v0.2 included activities for the production and dissemination of a wiki page that included the Standard v0.1 and work was also done towards updating the parts of the Standard that describe the data and technologies used in living labs, using a Delphi study method and collected the first set of terms for the living lab lexicon. Moreover, during the second semester, the Harmonization Board was established and a meeting with the Harmonization Body took place as well. The implemented activities for the current deliverable included the preparation of two templates for the co-creation sessions performed during the Joint Research Activities (JRAs). Also, for the current update of the Standard, it was conducted a session for updating the devices and technologies taxonomy (Delphi study), some meetings and sessions devoted to the services and procedures categorization, as well as some meetings and activities for collecting and reaching a preliminary consensus upon the terms of the living lab lexicon. In addition, during this third semester, took place the 2nd plenary meeting of the project in Helsinki, as well as the 2nd Harmonization Body meeting. The final Section of this document presents the Standard v0.3 that will be also published in the living lab harmonization wiki page.
An exploratory study of job attraction and job satisfaction
Creators: name: Van Westerborg, Dennis
Publisher: name: University of British Columbia
Year: 2010

description: A conceptual framework of job attraction is formulated and several operational definitions of job attraction proposed. Data from a sample of professionals (113 professional engineers) are reported on the relationship of these definitions (and of corresponding job satisfaction definitions) to two measures of overall job attraction and two traditional measures of overall job satisfaction. It was found that all of the operational definitions of job attraction (and job satisfaction) do not yield empirically comparable measures of attraction (satisfaction). Several of these measures, two of which were discrepancy scores, correlated better with the overall rating of job attraction than did the others. A convergent and discriminant validity matrix analysis suggested that it is possible to validly measure people's attraction to various facets of their jobs. The effect of Rotter's Internal-External orientation on the relationship of job attraction formulations and overall attraction was explored. Certain formulations were found to be better predictors of overall attraction (and satisfaction) for Externals or Internals than others. Several suggestions are delineated with respect to future studies designed to further develop a theory of job attracti on.
Asymptotic behavior of the Kleinberg model
Creators: name: Carmi, Shai
name: Carter, Stephen
name: Sun, Jie
name: ben-Avraham, Daniel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We study Kleinberg navigation (the search of a target in a d-dimensional lattice, where each site is connected to one other random site at distance r, with probability proportional to r^{-a}) by means of an exact master equation for the process. We show that the asymptotic scaling behavior for the delivery time T to a target at distance L scales as (ln L)^2 when a=d, and otherwise as L^x, with x=(d-a)/(d+1-a) for ad+1. These values of x exceed the rigorous lower-bounds established by Kleinberg. We also address the situation where there is a finite probability for the message to get lost along its way and find short delivery times (conditioned upon arrival) for a wide range of a's.
Initial and final de Sitter universes from modified $f(R)$ gravity
Creators: name: Cognola, G.
name: Elizalde, E.
name: Odintsov, S. D.
name: Tretyakov, P.
name: Zerbini, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Viable models of modified gravity which satisfy both local as well as cosmological tests are investigated. It is demonstrated that some versions of such highly non-linear models exhibit multiply de Sitter universe solutions, which often appear in pairs, being one of them stable and the other unstable. It is explicitly shown that, for some values of the parameters, it is possible to find several de Sitter spaces (as a rule, numerically); one of them may serve for the inflationary stage, while the other can be used for the description of the dark energy epoch. The numerical evolution of the effective equation of state parameter is also presented, showing that these models can be considered as natural candidates for the unification of early-time inflation with late-time acceleration through dS critical points. Moreover, based on the de Sitter solutions, multiply SdS universes are constructed which might also appear at the (pre-)inflationary stage. Their thermodynamics are studied and free energies are compared.
description: 25 pages, 8 figures, 2 references added; PRD accepted version
Quasi-planar optics: computing light propagation and scattering in planar waveguide arrays
Creators: name: Thongrattanasiri, Sukosin
name: Elser, Justin
name: Podolskiy, Viktor A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We analyze wave propagation in coupled planar waveguides, pointing specific attention to modal cross-talk and out-of-plane scattering in quasi-planar photonics. An algorithm capable of accurate numerical computation of wave coupling in arrays of planar structures is developed and illustrated on several examples of plasmonic and volumetric waveguides. An analytical approach to reduce or completely eliminate scattering and modal cross-talk in planar waveguides with anisotropic materials is also presented.
title: An Examination of What Motivates Utah Residents to Adopt the Practice of Rainwater Harvesting
Creators: name: Honaker, D. Wayne
Publisher: name: Utah State University
Year: 2018

description: Although most of the earth is covered in water, a very limited amount of that water is fresh water, which is essential to our survival. Therefore, it is imperative that we do all that is possible to conserve and protect our extremely limited water resources, especially in arid regions such as the American West. While there are many ways and means to protecting and preserving our water resources, this thesis focuses on the strategy of rainwater harvesting (RWH) as it is done throughout the state of Utah. RWH is defined as taking the precipitation that falls on our built structures and putting it to good use when it would often otherwise end up in gutters, pipes, and storm drains to be processed and/or disposed of at a distant location. RWH systems consist of several different components including a catchment area (usually, but not always, a rooftop), gutters, a place for storage, and some way of future dispersal and use of the collected water. There are numerous documented benefits to RWH.
Historically, RWH has not been allowed in states—such as Utah—that follow the doctrine of prior appropriation, which strongly defends the case for water rights and affirms that senior water rights should not be infringed upon. According to the law, when someone practiced RWH they were infringing on the water rights of others. However, in 2010, the Utah State Legislature modified these long-standing laws to allow residents of Utah to legally harvest up to 2,500 gallons at a time without fear of infringement on others’ water rights. Since then, many Utahans have adopted RWH. However, the number of Utah residents who are practicing RWH is still a tiny percentage of the entire Utah population.
This research included surveying self-identified rainwater harvesters throughout Utah and sought to discover and understand their motivations for adopting the practice. This information has the potential to assist planners, water districts, water managers, cities, state agencies, and legislators in persuading others throughout the state to also adopt the practice. It was found that an emergency supply of water and concern for the environment are the most important motivators for Utah rainwater harvesters. Unsurprisingly, financial savings also had a significant influence on harvesters and their decision to practice RWH, although they spent considerably less on their RWH systems than is typically spent in other states and countries.
A secondary aspect of the research was to examine Utah State Senate Bill 32, the current law in Utah concerning RWH. It was found that the current laws are written in a restrictive manner and should be changed and adjusted in order for a greater percentage of the Utah population to be motivated to adopt RWH.
The hunt for theta13 at the Daya Bay nuclear power plant
Creators: name: Wang, Wei
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Daya Bay reactor neutrino experiment is located at the Daya Bay nuclear power plant in Shenzhen, China. The experiment deploys eight "identical" antineutrino detectors to measure antineutrino fluxes from six 2.9 GW_{th} reactor cores in three underground experimental halls at different distances. The target zone of the Daya Bay detector is filled with 20 t 0.1% Gd doped LAB liquid scintillator. The baseline uncorrelated detector uncertainty is ~0.38% using current experimental techniques. Daya Bay can reach a sensitivity of <0.01 to $sin^2 2theta_{13}$ with baseline uncertainties after 3 years of data taking.
description: The proceeding submitted to NuFact09
Observations of multiple NH$_3$ transitions in W33
Creators: name: Tursun, K.
name: Henkel, C.
name: Esimbek, J.
name: Tang, X. D.
name: Wilson, T. L.
name: Malawi, A.
name: Alkhuja, E.
name: Wyrowski, F.
name: Mauersberger, R.
name: Immer, K.
name: Asiri, H.
name: Zhou, J. J.
name: Wu, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: At a distance of 2.4kpc, W33 is an outstanding massive and luminous 10pc sized star forming complex containing quiescent infrared dark clouds as well as highly active infrared bright cloud cores heated by young massive stars. We report measurements of ammonia (NH$_3$) inversion lines in the frequency range 18--26GHz, obtained with the 40" resolution of the 100 m Effelsberg telescope. We have detected the ($J$, $K$)=(1,1), (2,2), (3,3), (4,4), (5,5), (6,6), (2,1) and (3,2) transitions. There is a maser line in the (3,3) transition towards W33 Main. Brightness temperature and line shape indicate no significant variation during the last $\sim$36yr. We have determined kinetic temperatures, column densities and other physical properties of NH$_3$ and the molecular clouds in W33. For the total-NH$_3$ column density, we find for 40"(0.5pc) sized regions 6.0($\pm$2.1)$\times$10$^{14}$, 3.5($\pm$0.1)$\times$10$^{15}$, 3.4($\pm$0.2)$\times$10$^{15}$, 3.1($\pm$0.2)$\times$10$^{15}$, 2.8($\pm$0.2)$\times$10$^{15}$ and 2.0($\pm$0.2)$\times$10$^{15}$cm$^{-2}$ at the peak positions of W33 Main, W33 A, W33 B, W33 Main1, W33 A1 and W33 B1, respectively. W33 Main has a total-NH$_3$ fractional abundance of 1.3($\pm$0.1)$\times$10$^{-9}$ at the peak position. High values of 1.4($\pm$0.3)$\times$10$^{-8}$, 1.6($\pm$0.3)$\times$10$^{-8}$, 3.4($\pm$0.5)$\times$10$^{-8}$, 1.6($\pm$0.5)$\times$10$^{-8}$ and 4.0($\pm$1.2)$\times$10$^{-8}$ are obtained at the central positions of W33 A, W33 B, W33 Main1, W33 A1, and W33 B1. From this, we confirm the already previously proposed different evolutionary stages of the six W33 clumps and find that there is no hot core in the region approaching the extreme conditions encountered in W51-IRS2 or Sgr B2. The ortho-to-para-NH$_3$ abundance ratios suggest that ammonia should have been formed in the gas phase or on dust grain mantles at kinetic temperatures of $\gtrsim$20K.
description: 30 pages, 21 figures, accepted by A&A