cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Probing a composite spin-boson environment
Creators: name: Oxtoby, Neil P.
name: Rivas, Ángel
name: Huelga, Susana F.
name: Fazio, Rosario
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider non-interacting multi-qubit systems as controllable probes of an environment of defects/impurities modelled as a composite spin-boson environment. The spin-boson environment consists of a small number of quantum-coherent two-level fluctuators (TLFs) damped by independent bosonic baths. A master equation of the Lindblad form is derived for the probe-plus-TLF system. We discuss how correlation measurements in the probe system encode information about the environment structure and could be exploited to efficiently discriminate between different experimental preparation techniques, with particular focus on the quantum correlations (entanglement) that build up in the probe as a result of the TLF-mediated interaction. We also investigate the harmful effects of the composite spin-boson environment on initially prepared entangled bipartite qubit states of the probe and on entangling gate operations. Our results offer insights in the area of quantum computation using superconducting devices, where defects/impurities are believed to be a major source of decoherence.
description: 20 pages, 9 colour figures, I.O.P. style, published version; See Video Abstract at http://www.quantiki.org/video_abstracts/09014470
Objektinformationen für die Veröffentlichung im Portal Deutsche Digitale Bibliothek strukturieren: Pflichtelemente und Ausbaumöglichkeiten
Creators: name: Marchini, Chiara
Publisher: name: Zenodo
Year: 2023
Subjects: Datenqualität
Deutsche Digitale Bibliothek
Normdaten
LIDO
Kernfeldkatalog
Museen
NFDI4Culture

description: Vortrag im Rahmen der NFDI4Culture-Workshopreihe "In vier Schritten zu mehr Nachhaltigkeit. Datenqualitäts-Strategien für Museen und Sammlungen" (Workshop 3 "Weichenstellungen für mehr Qualität: Objektbezogene Informationen strukturieren, kontrollierte Vokabulare einsetzen"), 30.6.2023 (online)
Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses
Creators: name: Al-Wardat, Mashhoor Ahmad
name: Hussein, Abdallah M.
name: Al-Naimiy, Hamid M.
name: Barstow, Martin A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Precise measurement of the fundamental parameters of stellar systems, including mass and radius, depends critically on how well the stellar distances are known. Astrometry from space provides parallax measurements of unprecented accuracy, from which distances can be derived, initially from the Hipparcos mission, with further refinement of that analysis provided by van Leeuwen in 2007. The publication of the Gaia DR2 catalogue promises a dramatic improvement in the available data. We have recalculated the dynamical masses of a sample of 1 700 close visual binary stars using Gaia DR2 and compared the results with masses derived from both the original and enhanced Hipparcos data. We show the van Leeuwen analysis yields results close to those of Gaia DR2, but the latter are significantly more accurate. We consider the impact of the Gaia DR2 parallaxes on our understanding of the sample of visual binaries.
description: 18 pages, 26 Figures, and 5 tables
The interplay between helicity and rotation in turbulence: implications for scaling laws and small-scale dynamics
Creators: name: Pouquet, A.
name: Mininni, P. D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Invariance properties of physical systems govern their behavior: energy conservation in turbulence drives a wide distribution of energy among modes, observed in geophysical or astrophysical flows. In ideal hydrodynamics, the role of helicity conservation (correlation between velocity and its curl, measuring departures from mirror symmetry) remains unclear since it does not alter the energy spectrum. However, with solid body rotation, significant differences emerge between helical and non-helical flows. We first outline several results, like the energy and helicity spectral distribution and the breaking of strict universality for the individual spectra. Using massive numerical simulations, we then show that small-scale structures and their intermittency properties differ according to whether helicity is present or not, in particular with respect to the emergence of Beltrami-core vortices (BCV) that are laminar helical vertical updrafts. These results point to the discovery of a small parameter besides the Rossby number; this could relate the problem of rotating helical turbulence to that of critical phenomena, through renormalization group and weak turbulence theory. This parameter can be associated with the adimensionalized ratio of the energy to helicity flux to small scales, the three-dimensional energy cascade being weak and self-similar.
title: Patología costal en la radiografía de tórax.¿Solo fracturas?
Creators: name: Fernandez Muñoz, Israel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Thorax

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Losobjetivos de este trabajoson: -conocer la anatomía y el aspecto radiológico normal de las costillas;
- determinar los signos más frecuentes que sugieren lesión costal,
así como las variantes normales más comunes;
- definir las...
title: Investigations of Variable Importance Measures Within Random Forests
Creators: name: Merrill, Andrew C.
Publisher: name: Utah State University
Year: 2009

description: Random Forests (RF) (Breiman 2001; Breiman and Cutler 2004) is a completely nonparametric statistical learning procedure that may be used for regression analysis and. A feature of RF that is drawing a lot of attention is the novel algorithm that is used to evaluate the relative importance of the predictor/explanatory variables. Other machine learning algorithms for regression and classification, such as support vector machines and artificial neural networks (Hastie et al. 2009), exhibit high predictive accuracy but provide little insight into predictive power of individual variables. In contrast, the permutation algorithm of RF has already established a track record for identification of important predictors (Huang et al. 2005; Cutler et al. 2007; Archer and Kimes 2008). Recently, however, some authors (Nicodemus and Shugart 2007; Strobl et al. 2007, 2008) have shown that the presence of categorical variables with many categories (Strobl et al. 2007) or high colinearity give unduly large variable importance using the standard RF permutation algorithm (Strobl et al. 2008). This work creates simulations from multiple linear regression models with small numbers of variables to understand the issues raised by Strobl et al. (2008) regarding shortcomings of the original RF variable importance algorithm and the alternatives implemented in conditional forests (Strobl et al. 2008). In addition this paper will look at the dependence of RF variable importance values on user-defined parameters.
Continuity of quantum channel capacities
Creators: name: Leung, Debbie
name: Smith, Graeme
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We prove that a broad array of capacities of a quantum channel are continuous. That is, two channels that are close with respect to the diamond norm have correspondingly similar communication capabilities. We first show that the classical capacity, quantum capacity, and private classical capacity are continuous, with the variation on arguments epsilon apart bounded by a simple function of epsilon and the channel's output dimension. Our main tool is an upper bound of the variation of output entropies of many copies of two nearby channels given the same initial state; the bound is linear in the number of copies. Our second proof is concerned with the quantum capacities in the presence of free backward or two-way public classical communication. These capacities are proved continuous on the interior of the set of non-zero capacity channels by considering mutual simulation between similar channels.
description: 12 pages, Revised according to referee's suggestions
title: Semiología ecográfica de la mama: Anatomía y estados fisiológicos.
Creators: name: Fernández Cuadriello, Estela
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Ultrasound
subject: Breast

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Nuestro objetivo es describir la anatomía mamaria con el fin de localizar adecuadamente cada estructura y elementos que la componen,
así como de conocer los diferentes cambios que sufre esta glándula durante las diferentes etapas evolutivas en la...
Generation of atomic entangled states in a bi-mode cavity via adiabatic passage
Creators: name: Chen, Li-Bo
name: Shi, Peng
name: Gu, Yong-Jian
name: Xie, Lin
name: Ma, Li-Zhen
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose schemes to prepare atomic entangled states in a bi-mode cavity via stimulated Raman adiabatic passage (STIRAP) and fractional stimulated Raman adiabatic passage (f-STIRAP) tech- niques. According to the simulation results, our schemes keep the cavity modes almost unexcited and the atomic excited states are nearly unpopulated during the whole process. The simulation also shows that the error probability is very small.
description: 6 pages, 3 figures
An adaptive 3D virtual learning environment for training software developers in scrum
Creators: name: Scott, Ezequiel
name: Campo, Marcelo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Scrum is one of the most used frameworks for agile software development because of its potential improvements in productivity, quality, and client satisfaction. Academia has also focussed on teaching Scrum practices to prepare students to face common software engineering challenges and facilitate their insertion in professional contexts. Furthermore, advances in learning technologies currently offer many virtual learning environments to enhance learning in many ways. Their capability to consider the individual learner preferences has led a shift to more personalised training approaches, requiring that the environments adapt themselves to the learner. We propose an adaptive approach for training developers in Scrum, including an adaptive virtual learning environment based on Felder's learning style theory. Although still preliminary, our findings show that students who used the environment and received instruction matching their preferences obtained sightly higher learning gains than students who received a different instruction than the one they preferred. We also noticed less variability in the learning gains of students who received instruction matching their preferences. The relevance of this work goes beyond the impact on learning gains since it describes how adaptive virtual learning environments can be used in the domain of Software Engineering.
ASSESSMENT OF STRAWBERRY CULTIVATION MANAGEMENT (GHARB AND LOUKKOS)
Creators: name: Sanaa Oudebji
name: Najoua Mouden
name: Karima Selmaoui
name: Jamila Dahmani
name: Amina Ouazzani Touhami
name: Allal Douira
Publisher: name: Zenodo
Year: 2024
Subjects: Variety, North-west Morocco, Loukkos, Gharb, Strawberry, Phytosanitary, Management.

description: Abstract

The study surveyed 11 phytosanitary boxes and 37 strawberry growers in Gharb and Loukkos, North-West Morocco, to understand strawberry crop management issues, practices, and farmers' knowledge. Chemical pest management is achieved using a variety of pesticides, with fungicides being the most common. However, less than 30% of growers have adequate education on pesticide use. Integrated pest and disease management is shared by 56% of farmers in Loukkos and 42% in Gharb. Over 70% are willing to introduce biological control as a new phytosanitary approach. Thus, the phytosanitary statue of strawberry cropping fields seemd disquieting, even potential hazards for the environment, farmers and consumers in Gharb-Loukkos perimeter are expected.
title: Incorporating Technology in Mathematics Education: A Suite of E-Activities for the Modem Mathematics Classroom
Creators: name: Youngberg, Jennifer E.
Publisher: name: Utah State University
Year: 2001

description: National studies indicate major deficiencies in students' understanding of mathematics. Research suggests that students tend to view mathematics as a set of computational rules rather than a process of discovery and a tool for problem-solving. Most students fail to grasp the concepts behind the computations.
Technology provides a partial solution to this problem. Over the past decade, computers have emerged as a powerful tool in education. Computers place the control of action in the learning process with the student. They allow students to experiment with, explore, and discover mathematics at their own pace. With computers, students can consider more examples than are possible with a pencil and paper. The graphic capability of computers aids students in concept visualization; the computational capacity allows them to focus on concepts while the computer executes the tedious computations.
The purpose of this thesis is to facilitate the effective use of computers in mathematics education. The primary component of this thesis is a CD-ROM containing a suite of computer manipulatives intended for use in the mathematics classroom. An explanation of the manipulatives accompanies the CD-ROM, as does a description of the creation process.
title: Manisfestaciones óseas de la Histiocitosis de células de Langerhans: de lo frecuente a lo infrecuente.
Creators: name: Acosta González, Sara
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Musculoskeletal system

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Describir las formas de presentación más frecuentes y algunas atípicas de la Histiocitosis de células de Langerhans con afectación ósea tras una revisión retrospectiva de los casos de un hospital pediátrico recopilados desde 2006 a...
title: Plume Contamination Measurements of an Additively-Printed GOX/ABS Hybrid Thruster
Creators: name: Brewer, David A.
Publisher: name: Utah State University
Year: 2018

description: This thesis examines the impact of the physical contamination on optical surfaces of spacecraft by an ABS/GOX thruster. Plume contamination presents a significant operational hazard for spacecraft solar arrays and thermal control surfaces can lead to decreased power production and increased spacecraft temperatures. Historically, due to the lack of a reliable, on-demand, and multiple-use ignition methodology, hybrid rockets have never been previously considered for in-space propulsion. Recent advancements in hybrid rocket technologies, have made hybrid systems feasible for in space propulsion. However, prior to this study no research had ever been performed with regard to plume contamination effects due to hybrid rockets. This paper presents the results from a set of preliminary plume contamination measurements on a prototype small spacecraft hybrid rocket system, collected under both ambient and vacuum chamber conditions.
Light's Bending Angle in the Equatorial Plane of a Kerr Black Hole
Creators: name: Iyer, Savitri V.
name: Hansen, Edward C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present here a detailed derivation of an explicit spin-dependent expression for the bending angle of light as it traverses in the equatorial plane of a spinning black hole. We show that the deflection produced in the presence of the black hole angular momentum explicitly depends on whether the motion of the light ray is in the direction, or opposite to the spin. Compared to the zero-spin Schwarzschild case, the bending angle is greater for direct orbits, and {\em smaller} for retrograde orbits, confirming our physical intuition about the loss of left-right symmetry from a lensing perspective. In addition, we show that for higher spins, the effect is more pronounced resulting in tighter winding of direct orbits with respect to the axis of rotation, and a higher degree of unwinding of retro orbits. A direct consequence of this effect is a shift in image positions in strong gravitational lensing.
description: 6 figures
title: Complicaciones postneumonectomía
Creators: name: Guijo Hernandez, Teresa
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: CT
subject: Conventional radiography
subject: Lung

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
La cirugía de resección pulmonar constituye una de los tratamientos fundamentales en el cáncer de pulmón.
Tambien se emplea en el tratamiento de bronquiectasias,
lesiones congénitas,
traumatismos… El radiólogo debe conocer la evolución...
The GloWorm Project: Compiling regional level data to understand large-scale distributions of native and non-native species
Creators: name: Phillips, Helen R P
name: Cameron, Erin K
Publisher: name: Zenodo
Year: 2023
Subjects: earthworms
species lists
taxonomy
global
biodiversity
non-native species

description: Short project overview for the GloWorm project. Note, this document has not been peer-reviewed, it has been produced to provide background information for an ongoing project.
Structural and interactive relationships between intertidal Fucus populations and associated faunal assemblages
Creators: name: Nassichuk, M. D.
Publisher: name: University of British Columbia
Year: 2010

description: Intertidal populations of Fucus at two sites along the British Columbia coast were investigated in an attempt to establish relation ships between various structural components of the alga and associated faunal assemblages. Experimental field and laboratory techniques were utilized along with a sampling program designed to monitor temporal variation in faunal diversity and to determine the role of algal complexity in the formation and maintenance of associated animal communities. Algal structure was shown to be correlated with faunal diversity although other factors, i.e., Fucus height diversity, were more strongly associated with faunal diversity at certain times of the year. The diversity of the fauna associated with Fucus differed between the two study areas and possible reasons for the differences are discussed. The factors controlling the lower intertidal distribution of Fucus were examined through field and laboratory experimentation. Biological interactions appear to be of primary importance in controlling the lower distribution of the alga.
title: Biomass and Phycocyanin from Oil and Natural Gas Extraction Produced Water Utilizing a Cyanobacteria Dominated Rotating Algal Biofilm Reactor (RABR)
Creators: name: Wood, Jonathan L.
Publisher: name: Utah State University
Year: 2018

description: The production of cyanobacterial biofilm biomass and phycocyanin from Rotating Algal Biofilm Reactors utilizing undiluted produced water from oil and natural gas extraction as a culture medium was investigated in this study. Produced water is the largest waste stream generated by the oil and natural gas industries and represents a large volume of non-potable water that may be available for algae culture with minimal impact on freshwater resources. Combining the use of produced wastewater as culture medium with the production of high value algal pigments, such as phycocyanin, may increase the economic viability of algae culture and wastewater purification. High value phycocyanin pigment production and methods to increase phycocyanin yields with light limitation were examined in this study. A unique cyanobacteria species was isolated from the Logan City Wastewater Treatment Facility in Logan, Utah and used in conjunction with the Rotating Algal Biofilm Reactor platform for the duration of this study.
Between the “high” and “low” light treatments used in this study, the high light treatment showed nearly twice the biomass production as the low light culture (4.8±0.7 vs. 2.7±0.4 g/m2-day). The low light biomass contained 87.6% more of the phycocyanin pigment, with a 230% increase in purity, then the biomass from the high light treatment. The areal footprint productivity of phycocyanin per day was the same for both the light treatments.
An evaluation of growth attachment materials was conducted with cotton rope and cotton conveyer cloth materials found to be the most durable and having the highest yields of harvestable biomass. The cotton rope and cotton conveyor cloth materials were evaluated on a floating Rotating Algal Biofilm Reactor operating in a 2000 L outdoor produced water pond. The cotton rope yielded a 140% increase in biomass vs. the cotton cloth although the compositions varied greatly. The cotton cloth biomass was composed of mainly healthy algae with higher phycocyanin yields while the cotton rope showed a higher proportion of non-algae organisms and little phycocyanin. These results show promise for the utilization of produced water to grow cyanobacteria biofilms with modifiable biomass characteristics as a source of high value phycocyanin pigments.
THE MODERATING ROLE OF HUMAN CAPITAL DEVELOPMENT IN BANKING SECTOR DEVELOPMENT AND ECONOMIC GROWTH NEXUS: THE CASE OF SUB-SAHARA AFRICA (2000 – 2020)
Creators: name: DINKA'A, ADRIAN YEBIT
name: NJIE IMMACULATE LUM
name: ASEH VICTOR TEMBENG
name: CHINYERE C. ONYEJIAKU
name: JOSAPHAT UCHECHUKWU JOE ONWUMERE
name: JOY ENEMUO
Publisher: name: Zenodo
Year: 2024
Subjects: Human Capital Development, Banking Sector Development, Economic Growth, Sub-Saharan Africa.

description: Abstract

This study examined the interactive effect between human capital development and banking sector development on economic growth in Sub-Saharan Africa (SSA) for the period 2000 to 2020. Specifically, the study investigated the long-run and short-run relationship between banking sector development and economic growth and the long-run and short-run relationship between human capital development and economic growth in SSA. Using an ex-post research design, the study analysed data of 28 selected SSA countries obtained from World Development Indicators, (2022). The dependent variable was economic growth captured by GDP per capita growth. The independent variables were education, health, Physical Capital, Broad Money, Bank Credit to Private Sector, Interactive effect of health and education, Employed labour force, Openness to trade, Terms of Trade and Inflation. The panel Auto Regressive Distributed Lag (ARDL) model was used for estimation and the findings show that, human capital development and banking sector development both impacted economic growth positively and significantly in the long run. Also, a higher rate of economic growth was observed when human capital development was interacted with banking sector development. However, the variables did not have a significant effect on economic growth in the short run.  The study suggested the need to invest more in human capital development as a means to maximise the effect of banking sector development on economic growth.
title: Changes in Cultural Capital for Native English and Native Spanish-Speaking Families' Children Who Do and Do Not Participate in an Elementary Spanish Dual Immersion Program
Creators: name: Smithee, Allen
Publisher: name: Utah State University
Year: 2018

description: This study is framed in Bourdieu’s theory of capital, which asserts that the choices we make are usually designed to help us become better off economically; that economic capital is, to some degree, exchangeable with other types of capital (e.g., social and cultural); and that other types of capital can be exchanged for economic capital. The purpose of this study was to understand which forms of capital native English-speaking and native Spanish-speaking families believed they would acquire by choosing to participate in or not participate in Spanish dual language immersion.
In this study I interviewed four native Spanish-speaking students who did not participate in dual language immersion, and their parents, and four native English-speaking students who did participate in dual language immersion, and their parents. I also conducted a focus group with the teachers of both the native Spanish and native English-speaking students.
I found that the native English-speaking families perceived that they were able to use the dual language immersion program to gain many forms of capital. By contrast, the native Spanish-speaking families also perceived that they gained capital by not participating in the program, but not as much as if they had participated in dual language immersion. I suggest some ways to make participation in dual language immersion more equitable for all families.
Classes of AdS4 type IIA/IIB compactifications with SU(3)xSU(3) structure
Creators: name: Lust, Dieter
name: Tsimpis, Dimitrios
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce an ansatz which allows us to solve the supersymmetry equations for warped N=1 AdS4 type II supergravity compactifications of general SU(3)xSU(3) structure. As a byproduct we obtain a set of necessary conditions which every supersymmetric AdS4 vacuum should obey. The case of AdS4 compactifications of IIB on manifolds of static SU(2) structure is examined in detail. Several examples of solutions are presented. In the limit of four-dimensional Minkowski space, we present examples of supersymmetric IIB warped compactifications with partially localized NS5- and D5-branes. We also present `massive' non-supersymmetric AdS4xM6 solutions of IIA, where M6 can be any six-dimensional Einstein-Kaehler manifold.
description: 30 pages, 1 figure; added references; version to appear in JHEP; typo corrected in eq. 2.15
Cultural Offer and Distance in a Spatial Interaction Model for Tourism
Creators: name: Patuelli, Roberto
name: Mussoni, Maurizio
name: Candela, Guido
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: SECS-P/02 Politica economica

description: Culture is more and more considered as an important driver of tourism. However, it is critical, for policymakers, to evaluate the potential returns from investments in culture and generally cultural offer, in particular in multiregion settings with a potentially inefficient distribution of cultural offer. Our paper focuses on the role of distance (between the tourist’s origin and destination regions) in mediating the tourism impact of cultural offer. This
research question is investigated by means of a spatial interaction model, applied to the case of Italian domestic tourism. We find that distance indeed matters: a destination’s endowment in culture appears to be more attractive for long-distance tourists, while an origin region’s endowment seems to dinsincentivate long-distance trips to a greater extent.
Flavourful hadronic physics
Creators: name: El-Bennich, B.
name: Ivanov, M. A.
name: Roberts, C. D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review theoretical approaches to form factors that arise in heavy-meson decays and are hadronic expressions of non-perturbative QCD. After motivating their origin in QCD factorisation, we retrace their evolution from quark-model calculations to non-perturbative QCD techniques with an emphasis on formulations of truncated heavy-light amplitudes based upon Dyson-Schwinger equations. We compare model predictions exemplarily for the B\toπtransition form factor and discuss new results for the g_{D*Dπ} coupling in the hadronic D* decay.
description: Based on a talk given at Light Cone 2009: Relativistic Hadronic And Particle Physics, 8-13 July 2009, Sao Jose dos Campos, Sao Paulo, Brazil
Near-IR Search for Lensed Supernovae Behind Galaxy Clusters - II. First Detection and Future Prospects
Creators: name: Goobar, A.
name: Paech, K.
name: Stanishev, V.
name: Amanullah, R.
name: Dahlen, T.
name: Jonsson, J.
name: Kneib, J. P.
name: Lidman, C.
name: Limousin, M.
name: Mortsell, E.
name: Nobili, S.
name: Richard, J.
name: Riehm, T.
name: von Strauss, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Powerful gravitational telescopes in the form of massive galaxy clusters can be used to enhance the light collecting power over a limited field of view by about an order of magnitude in flux. This effect is exploited here to increase the depth of a survey for lensed supernovae at near-IR wavelengths. A pilot SN search program conducted with the ISAAC camera at VLT is presented. Lensed galaxies behind the massive clusters A1689, A1835 and AC114 were observed for a total of 20 hours split into 2, 3 and 4 epochs respectively, separated by approximately one month to a limiting magnitude J<24 (Vega). Image subtractions including another 20 hours worth of archival ISAAC/VLT data were used to search for transients with lightcurve properties consistent with redshifted supernovae, both in the new and reference data. The feasibility of finding lensed supernovae in our survey was investigated using synthetic lightcurves of supernovae and several models of the volumetric Type Ia and core-collapse supernova rates as a function of redshift. We also estimate the number of supernova discoveries expected from the inferred star formation rate in the observed galaxies. The methods consistently predict a Poisson mean value for the expected number of SNe in the survey between N_SN=0.8 and 1.6 for all supernova types, evenly distributed between core collapse and Type Ia SN. One transient object was found behind A1689, 0.5" from a galaxy with photometric redshift z_gal=0.6 +- 0.15. The lightcurve and colors of the transient are consistent with being a reddened Type IIP SN at z_SN=0.59. The lensing model predicts 1.4 magnitudes of magnification at the location of the transient, without which this object would not have been detected in the near-IR ground based search described in this paper (unlensed magnitude J~25). (abridged)
description: Accepted by AA, matches journal version
CIFRA National Survey: Uruguay October 1997
Creators: name: CIFRA, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Frequency of reading newspapers; approval of district mayor; approval of President Julio Maria Sanguinetti; personal medical service choices; membership status of social service program; preliminary election votes; likability of politicians and presidential candidates; economic situation of the country; relationship with grandparents; interest in politics; approval of presidents of public organizations; violence in the country; placement of armed forces in the streets; development of country; importance of country's use of technology; technology to improve sectors in society; economic situation of your family; political spectrum position; past voting history; future voting tendencies. National Agency for Research and Innovation (ANII) Collection.
Liver transplantation for transthyretin amyloidosis: experience of a single center in Italy
Creators: name: Berardi, Sonia <1974>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: MED/18 Chirurgia generale
MED/09 Medicina interna

description: Liver transplantation is the only definitive treatment for transthyretin amyloidosis, with an excellent
5-year survival in endemic countries where the Met30 mutation is predominant. We report our
experience of liver transplantation for transthyretin amyloidosis. We reviewed the clinical records
of 17 transplanted patients (11 males, 6 females; age at liver transplant: 45.7±11.7 years).
We had a wide spectrum of non-Met30 mutations (52.9%), with a predominance of Gln89 (23.5%).
Five-year survival after transplantation was 43.8%; at multivariate analysis, both non-Met30
mutations (HR 17.3, 95% CI 1.03-291.7) and modified BMI (HR 0.50, 95% CI 0.29-0.87) showed
significant and independent prognostic roles (P=0.048 and P=0.015, respectively). Five out of the 9
non-Met30 carriers received combined heart transplantation because of severe cardiomyopathy;
they showed a trend towards a better prognosis vs. the 4 patients who did not receive combined
heart transplantation (although not statistically significant; P=0.095). At follow-up, no significant
improvement of transthyretin amyloidosis manifestations was observed.
The results of liver transplantation for transthyretin amyloidosis in our population are poorer than
those reported in the literature probably because of the high prevalence of non-Met30 mutations.
Supplementary Information: 1 Model; 2 Experiment; 3 Meta-analysis from Elevated temperature increases genome-wide selection on de novo mutations
Creators: name: Berger, David
name: Stångberg, Josefine
name: Baur, Julian
name: Walters, Richard J.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Biophysics
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology

description: Extended Methods and results for all three main sections of the manuscript
title: Use of Verified Twitter Accounts During Crisis Events
Creators: name: Anderson, Kai
Publisher: name: Utah State University
Year: 2018

description: This thesis reports on the use of verified Twitter accounts during crisis events. Twitter is a social media platform that allows users to broadcast and exchange public text messages and it can be used as a communication tool during crisis events. Verified Twitter accounts are those accounts that Twitter has investigated and found to be genuinely maintained by the claimed owner. Celebrities, public officials, and other well-known persons or companies often seek this account status. The owners of these accounts are likely to provide more accurate or relevant information during a crisis event because they represent a brand, whether themselves or an organization.
To study the role verified Twitter accounts play in a crisis event, information was collected from Twitter’s API (Application Programming Interface) from February 28, 2018 through March 3, 2018 during a powerful storm on the East Coast of the United States called a Nor’easter. Through data collection and analysis, this thesis describe show verified Twitter accounts communicated during a crisis event. Three exploratory questions were proposed to better understand the use of verified Twitter accounts: Who are the verified Twitter users that tweet about a crisis event? What types of information do verified Twitter users tweet about a crisis event? When do verified Twitter users tweet about a crisis event? Results show that verified Twitter accounts create more original messages, share more informative messages, and spread less spam than their non-verified counterparts.
Testing the Simultaneity of Forbush Decreases with Algorithm-Selected Forbush Event Catalogue
Creators: name: Alhassan, J. A.
name: Okike, O.
name: Chukwude, A. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Accurate detection and precise timing of transient events such as X-ray photons, γ-ray burst, coronal mass ejections (CMEs), ground level enhancements (GLEs) and Forbush decreases (FDs) frequently raise issues that remain on the cutting edge of research in astrophysics. In an attempt to automate FD event selection, a combination of Fast Fourier transform as well as FD detection algorithms implemented in the statistical computing software R was developed and recently used to calculate the magnitude and FD event timing. The R-FD code implemented in the present study includes several different calculations. Some subroutines detect both small and large transient intensity reductions (minima/pits) as well as increases (maxima/peaks) in cosmic ray (CR) data. Others calculate event amplitude, timing and cataloging of the events identified. As the current work focuses on reductions in CR flux (FDs), the subroutine that identifies increases was disabled. Totals of 229 FDs at Magadan neutron monitor (NM), 230 (Oulu NM) and 224 (Inuvick NM) were identified with daily averaged data, while 4032 (Magadan), 4144 (Oulu) and 4055 (Inuvick) were detected with hourly averages. FDs identified as simultaneous at the three stations totaled 99 for the daily and 261 for the hourly CR averages respectively.
description: 26 pages, 6 figures, Accepted in Journal of Astrophysics and Astronomy
TEACHERS' PERSPECTIVES AND UNDERSTANDING OF THE USE OF TECHNOLOGY IN SPECIAL EDUCATION
Creators: name: S. SRI DEVI BANU
name: Dr. PREETHI SHESHADRI
name: Dr. A. CHITRA DEVI
Publisher: name: Zenodo
Year: 2024
Subjects: Special Education, Special Needs Students, Technology Integration.

description: Abstract

The contemporary age is continuously witnessing rapid technological developments that are changing the outlook of the education sector. The modern scenario prioritises digital education and technology integration, especially in a special educational setting. The current research article focuses on investigating the perspectives of teachers and their understanding of technology in special education. Evidence shows that teachers specialising in teaching children with special needs are seeing a major potential of technology in facilitating academic growth. However, there are certain obstacles hindering the proper incorporation of education technology essentially in terms of resources inefficiency lack of knowledge and lack of confidence to accept new technology.
The dynamics of individual nucleosomes controls the chromatin condensation pathway: direct AFM visualization of variant chromatin
Creators: name: Montel, Fabien
name: Menoni, Hervé
name: Castelnovo, Martin
name: Bednar, Jan
name: Dimitrov, Stefan
name: Angelov, Dimitar
name: Faivre-Moskalenko, Cendrine
Publisher: name: arXiv
Year: 2009
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Chromatin organization and dynamics is studied in this work at scales ranging from single nucleosome to nucleosomal array by using a unique combination of biochemical assays, single molecule imaging technique and numerical modeling. We demonstrate that a subtle modification in the nucleosome structure induced by the histone variant H2A.Bbd drastically modifies the higher order organization of the nucleosomal arrays. Importantly, as directly visualized by AFM, conventional H2A nucleosomal arrays exhibit specific local organization, in contrast to H2A.Bbd arrays, which show "beads on a string" structure. The combination of systematic image analysis and theoretical modeling allows a quantitative description relating the observed gross structural changes of the arrays to their local organization. Our results strongly suggest that higher-order organization of H1-free nucleosomal arrays is mainly determined by the fluctuation properties of individual nucleosomes. Moreover, numerical simulations suggest the existence of attractive interactions between nucleosomes to provide the degree of compaction observed for conventional chromatin fibers.
description: Biophys J. in press
Large microwave generation from d.c. driven magnetic vortex oscillators in magnetic tunnel junctions
Creators: name: Dussaux, A.
name: Georges, B.
name: Grollier, J.
name: Cros, V.
name: Khvalkovskiy, A. V.
name: Fukushima, A.
name: Konoto, M.
name: Kubota, H.
name: Yakushiji, K.
name: Yuasa, S.
name: Zvezdin, K. A.
name: Ando, K.
name: Fert, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin polarized current can excite the magnetization of a ferromagnet through the transfer of spin angular momentum to the local spin system. This pure spin-related transport phenomena leads to alluring possibilities for the achievement of a nanometer scale, CMOS compatible and tunable microwave generator operating at low bias for future wireless communications. Microwave emission generated by the persitent motion of magnetic vortices induced by spin transfer effect seems to be a unique manner to reach appropriate spectral linewidth. However, in metallic systems, where such vortex oscillations have been observed, the resulting microwave power is much too small. Here we present experimental evidences of spin-transfer induced core vortex precessions in MgO-based magnetic tunnel junctions with similar good spectral quality but an emitted power at least one order of magnitude stronger. More importantly, unlike to others spin transfer excitations, the thorough comparison between experimental results and models provide a clear textbook illustration of the mechanisms of vortex precessions induced by spin transfer.
THE CONSTITUTIONAL BALANCES AND THEIR IMPACT ON THE POLITICAL SYSTEM IN JORDAN - A COMPARATIVE STUDY
Creators: name: Dr. ABDUL-MAHDI AL-DOMOUR
Publisher: name: Zenodo
Year: 2024
Subjects: Constitutional Balances, the Jordanian Constitution, Constitutional Amendments, Public Freedoms, the Political System.

description: Abstract

This research work aims at identifying the importance and status of constitutional balances in Jordan and their impact on political life (a field study in the Hashemite Kingdom of Jordan), where the researcher will use the realistic inductive approach, relying on his extensive knowledge and research in several books and legal studies. Through his work in the field of law as a professor in one of the prestigious Jordanian universities, specifically in the Faculty of Law, and by virtue of his previous experiences in political and administrative work in the Hashemite Kingdom of Jordan, and through his follow-up, reading, and knowledge of the provisions of the Jordanian Constitution and its amendments, the researcher tried in this study to focus on the most important factors affecting stability and Constitutional balances and their impact on the Jordanian political system and the citizens, and how this system is contributing to maintaining the political, social and economic stability of the Hashemite Kingdom of Jordan. The researcher concluded at the end of the research that the ongoing constitutional amendments and the legislator's sophistication and keenness to preserve the constitutional balances in the Hashemite Kingdom of Jordan, have actually contributed to preserving the Jordanian political system, which contributed to the positive action to manage community resources and achieve internal and external security for the Hashemite Kingdom of Jordan and achieve the greatest public interests and work to reduce social contradictions.
title: A Deep Learning Approach to Recognizing Bees in Video Analysis of Bee Traffic
Creators: name: Tiwari, Astha
Publisher: name: Utah State University
Year: 2018

description: Colony Collapse Disorder (CCD) has been a major threat to bee colonies around the world which affects vital human food crop pollination. The decline in bee population can have tragic consequences, for humans as well as the bees and the ecosystem. Bee health has been a cause of urgent concern for farmers and scientists around the world for at least a decade but a specific cause for the phenomenon has yet to be conclusively identified.
This work uses Artificial Intelligence and Computer Vision approaches to develop and analyze techniques to help in continuous monitoring of bee traffic which will further help in monitoring forager traffic. Bee traffic is the number of bees moving in a given area in front of the hive over a given period of time. And, forager traffic is the number of bees entering and/or exiting the hive over a given period of time. Forager traffic is an important variable to monitor food availability, food demand, colony age structure, impact of pesticides, etc. on bee hives. This will lead to improved remote monitoring and general hive status and improved real time detection of the impact of pests, diseases, pesticide exposure and other hive management problems.
Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX7
Creators: name: Brightman, Murray
name: Bachetti, Matteo
name: Earnshaw, Hannah
name: Fürst, Felix
name: Heida, Marianne
name: Israel, Gian Luca
name: Pike, Sean
name: Stern, Daniel
name: Walton, Dominic J
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: M51 ULX7 is among a small group of known ultraluminous X-ray pulsars (ULXP). The neutron star powering the source has a spin period of 2.8s, orbits its companion star with a period of 2 days, and a super-orbital period of 38 days is evident in its X-ray lightcurve. Here we present NuSTAR and XMM-Newton data on the source from 2019 obtained when the source was near its peak brightness. We detect the pulsations, having spun up at a rate of 3$\pm0.5\times10^{-10}$ s s$^{-1}$ since they were previously detected in 2018. The data also provide the first high-quality broadband spectrum of the source. We find it to be very similar to that of other ULXPs, with two disk-like components, and a high energy tail. When combined with XMM-Newton data obtained in 2018, we explore the evolution of the spectral components with super-orbital phase, finding that the luminosity of the hotter component drives the super-orbital flux modulation. The inclination the disk components appear to change with phase, which may support the idea that these super-orbital periods are caused by disk precession. We also reexamine the super-orbital period with 3 years of Swift/XRT monitoring, finding that the period is variable, increasing from 38.2$\pm0.5$ days in 2018--2019 to 44.2$\pm0.9$ days in 2020--2021, which rules out alternative explanations for the super-orbital period.
description: Accepted for publication in ApJ
Nuclear Physics of Neutron Stars
Creators: name: Piekarewicz, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Understanding the equation of state (EOS) of cold nuclear matter, namely, the relation between the pressure and energy density, is a central goal of nuclear physics that cuts across a variety of disciplines. Indeed, the limits of nuclear existence, the collision of heavy ions, the structure of neutron stars, and the dynamics of core-collapse supernova, all depend critically on the equation of state of hadronic matter. In this contribution I will concentrate on the special role that nuclear physics plays in constraining the EOS of cold baryonic matter and its impact on the properties of neutron stars.
description: 10 pages, 5 figures, Proceedings of the 5th FRIB Workshop on Bulk Nuclear Properties