cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Simons Observatory: the Large Aperture Telescope Receiver (LATR) Integration and Validation Results
Creators: name: Xu, Zhilei
name: Bhandarkar, Tanay
name: Coppi, Gabriele
name: Kofman, Anna M.
name: Orlowski-Scherer, John L.
name: Zhu, Ningfeng
name: Ali, Aamir M.
name: Arnold, Kam
name: Austermann, Jason E.
name: Choi, Steve K.
name: Connors, Jake
name: Cothard, Nicholas F.
name: Devlin, Mark
name: Dicker, Simon
name: Dober, Bradley
name: Duff, Shannon M.
name: Fabbian, Giulio
name: Galitzki, Nicholas
name: Haridas, Saianeesh K.
name: Harrington, Kathleen
name: Healy, Erin
name: Ho, Shuay-Pwu Patty
name: Hubmayr, Johannes
name: Iuliano, Jeffrey
name: Lashner, Jack
name: Li, Yaqiong
name: Limon, Michele
name: Koopman, Brian J.
name: McCarrick, Heather
name: Moore, Jenna
name: Nati, Federico
name: Niemack, Michael D.
name: Reichardt, Christian L.
name: Sarmiento, Karen Perez
name: Seibert, Joseph
name: Silva-Feaver, Maximiliano
name: Sonka, Rita F.
name: Staggs, Suzanne
name: Thornton, Robert J.
name: Vavagiakis, Eve M.
name: Vissers, Michael R.
name: Walker, Samantha
name: Wang, Yuhan
name: Wollack, Edward J.
name: Zheng, Kaiwen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT), covering six frequency bands centering around 30, 40, 90, 150, 230, and 280 GHz. The SO observations will transform the understanding of our universe by characterizing the properties of the early universe, measuring the number of relativistic species and the mass of neutrinos, improving our understanding of galaxy evolution, and constraining the properties of cosmic reionization. As a critical instrument, the Large Aperture Telescope Receiver (LATR) is designed to cool $\sim$ 60,000 transition-edge sensors (TES) to $
description: 20 pages, 12 figures, submitted to the 2020 SPIE Astronomical Telescopes + Instrumentation
A Statistical Study of the Effects of Air Pollution on Children's Health
Creators: name: Stanwyck, Elizabeth Anne
Publisher: name: Maryland Shared Open Access Repository
Year: 2011
Subjects: Air Pollution
Children's Health
EPA
Meta-Analysis
NHIS

description: This research incorporates two approaches to the statistical analysis of ambient air pollution on children's health.  The first approach is an analysis of health and covariate data from the National Health Interview Survey and pollution data from the Environmental Protection Agency.  Extensive exploration of the relationships between the health outcomes asthma and respiratory allergies, covariates, and annual concentrations of TSP, SO2, NO2, CO, and O3 does not reveal a consistent connection between ambient air pollution concentrations and either health outcome.   Limitations of the data are discussed.  Due to the complex survey design of the National Health Interview Survey, design-based analysis is the gold standard in the cases when the entire data set is used, however in cases when the original data size is severely reduced, alternative methods of analysis may be preferred.  In order to compare the results of these two approaches, several different procedures are explored and the estimates of effect size and standard error are compared.  The second approach to analysis involves combining the results of published studies.  There have been numerous studies seeking to establish an association between air pollution and children's adverse health outcomes, and the ultimate findings are often varied. The conflicting results of these studies lead naturally to a novel application of statistical meta-analysis whose primary objective is to integrate or synthesize the findings from independent and comparable studies.  We conduct a meta-analysis focusing on the association between children's (binary) health outcomes (such as cough and respiratory symptoms) and four pollutants:  PM10, NO2, SO2, and O3.  While we find a statistically significant association in the case of every pollutant, in the cases of PM10, NO2, and SO2, there is heterogeneity among the estimated effect sizes.  We have explored the techniques of meta-regression by incorporating distinct study features to meaningfully explain the heterogeneity.
title: Replication of Spielman et al.'s 2020 Evaluation of the Social Vulnerability Index: Preregistration
Creators: name: Smith, Liam
name: Holler, Joseph
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Geographic Information Sciences
subject: Social and Behavioral Sciences
subject: Geography
subject: Principal Component Analysis
subject: Replicability
subject: Social Indicators
subject: Social Vulnerability
subject: Validity

description: Preregistration of a Replication study of Spielman et al's 2020 replication and reanalysis of the Social Vulnerability Index (SoVI) by Cutter, Boruff and Shirley (2003)
A MULTIPLE CRITERIA DECISION MAKING STATISTICAL METHOD FOR RANKING THE 2007-2011 CHESAPEAKE BAY REPORT CARD REGIONS
Creators: name: Sushon, Navneet Chana
Publisher: name: Maryland Shared Open Access Repository
Year: 2012
Subjects: Chesapeake Bay
MCDM
TOPSIS

description: An ecosystem health index combines vast quantities of environmental data across multiple components into a single value representing overall estuary health. Accurate assessment of estuary health is vital to informing spending and recovery priorities. In this thesis, we applied a Multiple Criteria Decision Making (MCDM) statistical technique in order to combine six indicators of Chesapeake Bay health into an overall health index. An index value was determined for each of the fifteen regions of the Bay, and the regions were ranked according to the index values. The ranks derived from the MCDM method were then compared to the ranks from the current report card methodology. In general, the results showed similar ranks between the two methods with a high level of agreement as measured by Spearman's rank correlation. Two regions, however, the Mid Bay and Upper Western Shore regions, differed considerably in rank and warrant further investigation.
Energy Distribution of the Universe in the Bianchi type II Cosmological Models
Creators: name: Aydogdu, Oktay
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper has been removed by arXiv administrators because it plagiarizes gr-qc/9910015, gr-qc/0008034, and hep-th/0308070. This paper also has excessive overlap with the following papers also written by the authors or their collaborators: gr-qc/0601070 and gr-qc/0509047.
description: This submission has been withdrawn by arXiv administrators due to inappropriate text reuse from external sources
Quantum Games in Open Systems using Biophysic Hamiltonians
Creators: name: Faber, Jean
name: Portugal, Renato
name: Rosa, Luiz Pinguelli
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the necessary physical conditions to model an open quantum system as a quantum game. By applying the formalism of Quantum Operations on a particular system, we use Kraus operators as quantum strategies. The physical interpretation is a conflict among different configurations of the environment. The resolution of the conflict displays regimes of minimum loss of information.
description: 9 pages, 4 figs, accepted in Phys. Lett. A
Barrier-Based Diabetes Self-Efficacy Survey: Measure Development and Implications for Self-Management of Type 2 Diabetes
Creators: name: Schumann, Kristina
Publisher: name: Maryland Shared Open Access Repository
Year: 2012
Subjects: Barriers
Diabetes
Measure Development
Self-Efficacy
Self-Management

description: Diabetes is a significant problem in the United States, particularly among ethnic minorities. Diabetes self-management, which requires a complex regimen of lifestyle behaviors that are difficult to initiate and maintain, is critical in obtaining and maintaining optimal glycemic control, and contributes to reducing or eliminating diabetes-related complications. Healthy eating, physical activity, and problem solving are particularly challenging self-management activities that are influenced by the individual's self-efficacy to perform these behaviors. There are a number of diabetes-specific measures of self-efficacy in the literature, however these existing measures, by and large, ignore situational contexts influencing diabetes self-management. The purpose of the current study was to assess the psychometric properties of a new measure of diabetes-specific self-efficacy, the Barrier-Based Diabetes Self-Efficacy Survey (BB-DSES), which evaluates self-efficacy for key, challenging self-management behaviors (i.e., healthy eating, physical activity, and problem solving) in specific situational contexts. It was hypothesized that these BB-DSES behavior specific scales would have multidimensional factor structures, adequate reliability and validity, and would explain a significant amount of variance in A1C. One hundred participants enrolled in a larger research study, Project DECIDE (Decision-making Education for Choices In Diabetes Everyday), were included in the analyses. Ten additional participants were invited to participate in cognitive interviews to better understand the BB-DSES. Cognitive interviews indicated that participants had very little difficulty interpreting and understanding the items on the BB-DSES. Exploratory factor analysis was conducted to analyze emerging factors within each of the behavior scales of the BB-DSES. Cronbach alpha coefficients, bivariate correlations, and OLS regression models were assessed to examine reliability and validity of the BB-DSES. Hierarchical multiple regression was used to examine the relations between behavior-specific self-efficacy and glycemic control. In the current study sample, factor analyses revealed a unidimensional factor structure of each behavior specific scale of the BB-DSES. The behavior scales of the BB-DSES uniquely predicted their respective self-management behaviors (i.e., healthful eating, physical activity, and effective problem solving). Overall the BB-DSES demonstrated adequate reliability and validity. However, the BB-DSES did not explain a significant amount of variance in glycemic control. Results are discussed in terms of both clinical and research significance.
An examination of social and role functioning among Baltimore youth at risk for psychosis
Creators: name: Wilson, Camille
Publisher: name: Maryland Shared Open Access Repository
Year: 2013
Subjects: prodrome
psychosis risk
schizophrenia

description: Social and role functioning have been determined to be risk factors and an outcome of interest for individuals who develop a psychotic disorder. Less is known about the nature of functioning for individuals at-risk for a psychotic disorder.  The current study examined the contribution of psychosis-risk symptoms to social and role functioning using multiple measures of functioning in a treatment-seeking sample of adolescents and young adults. Results of multiple regression analyses indicate that psychosis-risk symptoms contribute differentially to functioning based on the type of functioning (social and role), as well as the measure of functioning. Using an increased understanding of risk and general psychopathology to predict functioning within psychosis-risk samples may also provide valuable information that could aid early identification efforts to improve long-term functional outcomes, delay, or prevention of psychosis.
Elicitation on transitive verb agreement paradigms
Creators: name: Aguilar Láinez, Onísimo Basbaldo
name: Scott, Tessa
name: Sales, Henry
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mam

description: This is a remote video interview held using Zoom. Henry Sales, a Mam speaker from San Juan Atitán, provides translation between English and Mam using Mam and Spanish.

The elicitation focuses on agreement paradigms of the verbs il and ken both meaning "to see", and also includes some "when" clauses.

In this file bundle: 1 pdf of typed notes.
A Discrete, Three-Dimensional, Force-Based Mathematical Model of Collective Cell Migration
Creators: name: Stonko, David Patrick
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: Border Cells
Collective Cell Migration
Differential Equations
Drosophila Oogenesis
Mathematical Model

description: We present a novel mathematical approach to modeling the collective cell migration process that occurs during stages eight to ten of Drosophila oogenesis. This new approach uses the forces of adhesion, repulsion, migration and stochastic fluctuation to simulate the movement of discrete cells. At the start of oogenesis, the motile and non-motile cells of this system lie in the anterior follicular epithelium. These cells form a cluster and translocate as a collective to the posterior of the egg chamber, in the direction of the developing egg chamber. Our model captures the dynamics of these cells, as well as the epithelium that encloses the egg chamber, and the nurse cells that comprise the space that the cluster migrates through. We implement this using Identical Math Cells, or IMCs. These IMCs may each represent one biological cell of the system, or can be aggregated to model the dynamics of larger biological cells. They each can be assigned unique biophysical properties, which can be used to model a heterogeneous cell population. This also increases the diversity and biological accuracy of the cell-to-cell interactions that may potentially be modeled. Using this mathematical construct we have successfully simulated the migration of this cluster of cells. We have also used this model to investigate how altering the number of motile cells in the system affects the behavior of the migrating cluster. We show that decreasing the number of motile cells results in increased migration time, which has not been shown directly, but is believed to cause the loss of viability in vivo. We also show that the forces utilized in this model are sufficient to produce rotation of the cluster. Similar rotation has been observed in vivo and this result suggests that a more complex biophysical mechanism is not necessary to produce rotation of a migrating cluster. This model was developed to capture a heterogeneous cell population and was implemented with the flexibility to allow for diverse, but precise, initial position specification over a three-dimensional domain. Therefore, we believe that this model will be useful for not only examining aspects of Drosophila oogenesis, but also for modeling other two or three-dimensional systems that have multiple cell types and where investigating the forces between these cells is of interest.
Biospecimen Assessment
Creators: name: Danaher, Michelle R.
Publisher: name: Maryland Shared Open Access Repository
Year: 2012
Subjects: Bayesian order restricted modeling
biological constraints
estimation maximization algorithm
gene-environment interaction
methods for analyzing biospecimen measured in pools
testing for interaction

description: Biomaker evaluation has become a very important topic as epidemiologic studies increasingly depend on biomarkers to indicate exposure. In this dissertation, we contribute to the literature of biomaker assessment in two ways. First we consider pooling strategies for biomarker assessment. Pooling physically mixes two or more individual biospecimens and obtains a single biomarker measurement, thus reducing cost and the quantity of biospecimen required from each individual. Reducing cost without compromising power or efficiency may allow prohibitively expensive and very important hypotheses to be explored. For example, a pooling design that pools individuals in pairs will halve the costs associated with biomarker assessment. A particularly important hypothesis in studying complex diseases such as infertility, cancer, heart disease, and obesity is the gene-environment interaction. In this dissertation we propose novel pooling strategies for very inexpensive and efficient estimates of gene-environment interactions. Furthermore, we use the estimation maximization (EM) algorithm to estimate interaction effects of a logistic model when continuous biomarkers are measured in pools. Use of the EM algorithm when biomarkers are measured for pools rather than for each individual is an important and natural extension to the pooling literature. Second, we contribute to statistical methods for effectively incorporating known biological constraints in analyses of reproductive hormonal patterns during the menstrual cycle. Incorporating known biological constraints is important for proper statistical inference and it may increase model efficiency.
Investigation of ultrafast laser photonic material interactions: challenges for directly written glass photonics
Creators: name: Ams, M.
name: Marshall, G. D.
name: Dekker, P.
name: Dubov, M.
name: Mezentsev, V. K.
name: Bennion, I.
name: Withford, M. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Currently, direct-write waveguide fabrication is probably the most widely studied application of femtosecond laser micromachining in transparent dielectrics. Devices such as buried waveguides, power splitters, couplers, gratings and optical amplifiers have all been demonstrated. Waveguide properties depend critically on the sample material properties and writing laser characteristics. In this paper we discuss the challenges facing researchers using the femtosecond laser direct-write technique with specific emphasis being placed on the suitability of fused silica and phosphate glass as device hosts for different applications.
description: 11 pages, 87 references, 11 figures. Article in review
Digital art on the World Wide Web, 1996-1997
Creators: name: Johnson, Mia
Publisher: name: University of British Columbia
Year: 2009

description: This study draws upon what Howard Becker (1984) called "conventions" or characteristics that identify an art world, to determine conventions in the use of tools and techniques by digital artists. Two hundred images were sampled from approximately 600 "digital art" sites on the World Wide Web during 1996. A taxonomy of the characteristics or properties of these images was developed, partly by the researcher alone, and partly by the researcher in conjunction with five independent raters. Digital art conventions were identified, defined and analyzed in five categories: formal properties, content, styles, and digital properties unique to 2D and 3D graphics. The frequencies of 98 characteristics in these categories were then compared by gender, types of sites, types of programs and to each other. This study provides field-based groundwork for educators interested in developing curriculum for digital art, using approaches afforded by Discipline-based Art Education (DBAE). Following the summary of data, content analysis and discussion, this study assesses the findings in terms of their implications for discipline-based digital art production, aesthetics, criticism, and digital art history.
The influence of event-level factors and processes of change on safe sex and alcohol use among HIV+ men who have sex with men
Creators: name: Van Orden, Onna Rose
Publisher: name: Maryland Shared Open Access Repository
Year: 2013
Subjects: alcohol
condom use
event-level analyses
HIV
MSM
unprotected sex

description: This study involved secondary analyses of data from Positive Choices, a randomized clinical trial of a combined Motivational Interviewing and stage-based peer group intervention designed to reduce alcohol use and unprotected sexual behavior in a sample of 253 HIV+ men who have sex with men (MSM).  The primary aims sought to examine factors influencing the occurrence of heavy alcohol use and unprotected anal sex factors across the study, focusing on sexual-event level (i.e., each sexual event day) and participant-level (i.e., participant characteristics) as well as the effects of the intervention and processes of change based on the Transtheoretical Model of Intentional Behavior Change.  Major findings included an effect of main partner-type and an interaction between casual partner-type and depressive symptoms on unprotected anal sex at baseline, as well as evidence of complex relations between baseline behavior, younger age, and processes of change for safe sex and alcohol use in predicting same-day heavy alcohol use and unprotected anal sex across the 12-month study follow-up.  Implications of these findings for future research and interventions targeting HIV+ MSM are discussed.
Dissecting the stellar content of Leo I: a dwarf irregular caught in transition
Creators: name: Ruiz-Lara, T.
name: Gallart, C.
name: Monelli, M.
name: Fritz, T. K.
name: Battaglia, G.
name: Cassisi, S.
name: Aznar, M. Luis
name: Cabrera, A. V. Russo
name: Rodríguez-Martín, I.
name: Salazar-González, J. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Leo I is considered one of the youngest dwarf spheroidals (dSph) in the Local Group. Its isolation, extended star formation history (SFH), and recent perigalacticon passage (~1 Gyr ago) make Leo~I one of the most interesting nearby stellar systems. Here, we analyse deep photometric Hubble Space Telescope data via colour-magnitude diagram fitting techniques to study its global and radially-resolved SFH. We find global star formation enhancements in Leo I ~13, 5.5, 2.0, and 1.0 Gyr ago, after which it was substantially quenched. Within the context of previous works focused on Leo I, we interpret the most ancient and the youngest ones as being linked to an early formation (surviving reionisation) and the latest perigalacticon passage (transition from dIrr to dSph), respectively. We clearly identify the presence of very metal poor stars ([Fe/H]~-2) ageing ~5-6 and ~13 Gyr old. We speculate with the possibility that this metal-poor population in Leo I is related to the merging with a low mass system (possibly an ultra-faint dwarf). This event would have triggered star formation (peak of star formation ~5.5 Gyr ago) and accumulated old, metal poor stars from the accreted system in LeoI. Some of the stars born during this event would also form from accreted gas of low-metallicity (giving rise to the 5-6 Gyr low-metallicity tail). Given the intensity and extension of the 2.0 Gyr burst, we hypothesise that this enhancement could also have an external origin. Despite the quenching of star formation around 1 Gyr ago (most probably induced by ram pressure stripping with the Milky Way halo at pericentre), we report the existence of stars as young as 300-500 Myr. We also distinguish two clear spatial regions: the inner ~190 pc presents an homogeneous stellar content (size of the gaseous star forming disc in LeoI from ~4.5 to 1 Gyr ago), whereas the outer regions display a clear positive age gradient.
description: 20 pages, 11+5 figures, accepted for publication in MNRAS
The H$α$ star formation main sequence in cluster and field galaxies at $z\sim1.6$
Creators: name: Nantais, Julie
name: Wilson, Gillian
name: Muzzin, Adam
name: Old, Lyndsay J.
name: Demarco, Ricardo
name: Cerulo, Pierluigi
name: Balogh, Michael
name: Rudnick, Gregory
name: Chan, Jeffrey
name: Cooper, M. C.
name: Forrest, Ben
name: Hayden, Brian
name: Lidman, Chris
name: Noble, Allison
name: Perlmutter, Saul
name: Rhea, Carter
name: Surace, Jason
name: van der Burg, Remco
name: van Kampen, Eelco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We calculate H$α$-based star formation rates and determine the star formation rate-stellar mass relation for members of three SpARCS clusters at $z \sim 1.6$ and serendipitously identified field galaxies at similar redshifts to the clusters. We find similar star formation rates in cluster and field galaxies throughout our range of stellar masses. The results are comparable to those seen in other clusters at similar redshifts, and consistent with our previous photometric evidence for little quenching activity in clusters. One possible explanation for our results is that galaxies in our $z \sim 1.6$ clusters have been accreted too recently to show signs of environmental quenching. It is also possible that the clusters are not yet dynamically mature enough to produce important environmental quenching effects shown to be important at low redshift, such as ram pressure stripping or harassment.
description: 10 pages, 5 figures, accepted for publication in MNRAS
Conversational agents for learning foreign languages -- a survey
Creators: name: Petrovic, Jasna
name: Jovanovic, Mladjan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Conversational practice, while crucial for all language learners, can be challenging to get enough of and very expensive. Chatbots are computer programs developed to engage in conversations with humans. They are designed as software avatars with limited, but growing conversational capability. The most natural and potentially powerful application of chatbots is in line with their fundamental nature - language practice. However, their role and outcomes within (in)formal language learning are currently tangential at best. Existing research in the area has generally focused on chatbots' comprehensibility and the motivation they inspire in their users. In this paper, we provide an overview of the chatbots for learning languages, critically analyze existing approaches, and discuss the major challenges for future work.
description: Sinteza 2020 - International Scientific Conference on Information Technology and Data Related Research, Belgrade, Singidunum University, Serbia
Schwinger boson study of superconductivity mediated by antiferromagnetic spin-fluctuations
Creators: name: Erlandsen, Eirik
name: Sudbø, Asle
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study superconductivity in a normal metal, arising from effective electron-electron interactions mediated by spin-fluctuations in a neighboring antiferromagnetic insulator. Introducing a frustrating next-nearest neighbor interaction in a Néel antiferromagnet with an uncompensated interface, the superconducting critical temperature is found to be enhanced as the frustration is increased. Further, for sufficiently large next-nearest neighbor interaction, the antiferromagnet is driven into a stripe phase, which can also give rise to attractive electron-electron interactions. For the stripe phase, as previously reported for the Néel phase, the superconducting critical temperature is found to be amplified for an uncompensated interface where the normal metal conduction electrons are coupled to only one of the two sublattices of the magnet. The superconducting critical temperature arising from fluctuations in the stripe phase antiferromagnet can be further enhanced by approaching the transition back to the Néel phase.
description: 16 pages, 11 figures. Submitted to Physical Review B
Probing naturally light singlets with a displaced vertex trigger
Creators: name: Gershtein, Yuri
name: Knapen, Simon
name: Redigolo, Diego
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the physics case for a dedicated trigger on a low mass, hadronic displaced vertex at the high luminosity LHC, relying on the CMS phase II track trigger. We estimate the trigger efficiency with a simplified simulation of the CMS track trigger and show that the L1 trigger rate from fake vertices, B meson decays and secondary interactions with the detector material can likely be brought down to the kHz level with a minimal set of cuts. While it would with any doubt be a severe experimental challenge to implement, we conclude that a displaced vertex trigger could open qualitatively new parameter space for exotic Higgs decays, exotic B decays and even direct production of light resonances. We parametrize the physics potential in terms of a singlet scalar mixing with the Standard Model Higgs and an axion-like particle with a coupling to gluons, and review a number or relevant models motivated by the hierarchy and strong CP problems, dark matter and baryogenesis.
description: 18 pages, 8 figures
Discovery potential of radiative neutralino production at the ILC
Creators: name: Dreiner, Herbi K.
name: Kittel, Olaf
name: Langenfeld, Ulrich
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study radiative neutralino production e^+e^- \to \tildeχ^0_1 \tildeχ^0_1γat the linear collider with longitudinally polarised beams. We consider the Standard Model background from radiative neutrino production e^+e^- \to ν\barνγ, and the supersymmetric radiative production of sneutrinos e^+e^- \to \tildeν\tildeν^\ast γ, which can be a background for invisible sneutrino decays. We give the complete tree-level formulas for the amplitudes and matrix elements squared. In the Minimal Supersymmetric Standard Model, we study the dependence of the cross sections on the beam polarisations, on the parameters of the neutralino sector, and on the selectron masses. We show that for bino-like neutralinos longitudinal polarised beams enhance the signal and simultaneously reduce the background, such that statistics is significantly enhanced. We point out that there are parameter regions where radiative neutralino production is the only channel to study SUSY particles, since heavier neutralinos, charginos and sleptons are too heavy to be pair-produced in the first stage of the linear collider with \sqrt{s}=500 GeV.
description: 39 pages, 8 figures
Electro-viscous effects in capillary filling of nanochannels
Creators: name: Mortensen, Niels Asger
name: Kristensen, Anders
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We theoretically examine the widespread hypothesis of an electro-viscous origin of the increase in apparent viscosity observed in recent experiments on capillary filling of nanochannels. Including Debye-layer corrections to the hydraulic resistance we find that the apparent viscosity reaches a maximum in the mesoscopic regime where the channel height (or more generally the hydraulic radius) is comparable to the screening length. However, for realistic estimates of central parameters, we find that the electro-viscous contribution to the apparent viscosity is at most a 1% effect.
Genuine covariant description of Hamiltonian dynamics
Creators: name: Montesinos, Merced
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: After reviewing the covariant description of Hamiltonian dynamics, some applications are done to the non-relativistic isotropic three-dimensional harmonic oscillator, Rovelli's model, and SO(3,1) BF theories.
description: 13 pages, no figures, in VI Mexican School on Gravitation and Mathematical Physics, eds M. Alcubierre, J.L. Cervantes-Cota, and M. Montesinos (Bristol and Philadelphia: Institute of Physics Publishing, 2005)
Prequantum chaos: Resonances of the prequantum cat map
Creators: name: Faure, Frederic
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Prequantum dynamics has been introduced in the 70' by Kostant-Souriau-Kirillov as an intermediate between classical and quantum dynamics. In common with the classical dynamics, prequantum dynamics transports functions on phase space, but add some phases which are important in quantum interference effects. In the case of hyperbolic dynamical systems, it is believed that the study of the prequantum dynamics will give a better understanding of the quantum interference effects for large time, and of their statistical properties. We consider a linear hyperbolic map M in SL(2,Z) which generates a chaotic dynamics on the torus. This dynamics is lifted on a prequantum fiber bundle. This gives a unitary prequantum (partially hyperbolic) map. We calculate its resonances and show that they are related with the quantum eigenvalues. A remarkable consequence is that quantum dynamics emerges from long time behaviour of prequantum dynamics. We present trace formulas, and discuss perspectives of this approach in the non linear case.
description: 30 pages
Spectroscopic long-term monitoring of RZ Cas -- Part I: Basic stellar and system parameters
Creators: name: Lehmann, H.
name: Dervisoglu, A.
name: Mkrtichian, D. E.
name: Pertermann, F.
name: Tkachenko, A.
name: Tsymbal, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: RZ Cas is a short-period Algol-type system showing episodes of mass transfer and Delta Sct-like oscillations of its mass-gaining primary component. We analyse high-resolution spectra of RZ Cas that we obtained during a spectroscopic long-term monitoring lasting from 2001 to 2017. Spectrum analysis resulted in precise atmospheric parameters of both components, in particular in surface abundances below solar values. We find that the variation of orbital period is semi-regular and derive different characteristic timescales for different epochs of observation. We show that the radial velocity variations with orbital phase can be modelled when including two cool spots on the surface of the secondary component. The modelling leads to precise masses and separation of the components. The seasonal variation of several parameters, such as vsin(i), rotation-orbit synchronisation factor, strength of the spots on the cool companion, and orbital period, can be characterised by a common timescale of the order of nine years. We interpret the timescale of nine years as the magnetic activity cycle of the cool companion. In particular the behaviour of the dark spots on the cool companion leads us to the interpretation that this timescale is based on an 18-year magnetic dynamo cycle. We conclude that the mass-transfer rate is controlled by the variable depth of the Wilson depression in the magnetic spot around the Lagrangian point L1. In the result, based on available data, we observe a damped activity cycle of the star, starting with a high mass-transfer episode around 2001, followed by quiet periods in 2006 and 2009, slightly higher activity around 2013 and 2014, and again followed by quiet periods in 2015 and 2016. However, owing to missing data for years 2010 and 2011, we cannot exclude that a second high mass-transfer episode occurred within this time span.
description: 18 pages, 19 figures, 10 tables. Accepted for publication in Section 8 Stellar atmospheres of Astronomy and Astrophysics
Discovery of Radio Emission from the Tight M8 Binary: LP 349-25
Creators: name: Phan-Bao, N.
name: Osten, R. A.
name: Lim, J.
name: Martin, E. L.
name: Ho, P. T. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present radio observations of 8 ultracool dwarfs with a narrow spectral type range (M8-M9.5) using the Very Large Array at 8.5 GHz. Only the tight M8 binary LP 349-25 was detected. LP 349-25 is the tenth ultracool dwarf system detected in radio and its trigonometric parallax pi = 67.6 mas, recently measured by Gatewood et al., makes it the furthest ultracool system detected by the Very Large Array to date, and the most radio-luminous outside of obvious flaring activity or variability. With a separation of only 1.8 AU, masses of the components of LP 349-25 can be measured precisely without any theoretical assumptions (Forveille et al.), allowing us to clarify their fully-convective status and hence the kind of magnetic dynamo in these components which may play an important role to explain our detection of radio emission from these objects. This also makes LP 349-25 an excellent target for further studies with better constraints on the correlations between X-ray, radio emission and stellar parameters such as mass, age, temperature, and luminosity in ultracool dwarfs.
description: accepted by ApJ, referee's comments included, typo in equation 1 corrected
Orbital pericenters and the inferred dark matter halo structure of satellite galaxies
Creators: name: Robles, Victor H.
name: Bullock, James S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the phat-ELVIS suite of Milky Way-size halo simulations, we show that subhalo orbital pericenters, $r_{\rm peri}$, correlate with their dark matter halo structural properties. Specifically, at fixed maximum circular velocity, $V_{\rm max}$, subhalos with smaller $r_{\rm peri}$ are more concentrated (have smaller $r_{\rm max}$ values) and have lost more mass, with larger peak circular velocities, $V_{\rm peak}$, prior to infall. These trends provide information that can tighten constraints on the inferred $V_{\rm max}$ and $V_{\rm peak}$ values for known Milky Way satellites. We illustrate this using published pericenter estimates enabled by Gaia for the nine classical Milky Way dwarf spheroidal satellites. The two densest dSph satellites (Draco and Ursa Minor) have relatively small pericenters, and this pushes their inferred $r_{\rm max}$ and $V_{\rm max}$ values lower than they would have been without pericenter information. For Draco, we infer $V_{\rm max} = 23.5 \, \pm 3.3$ km s$^{-1}$ (compared to $27.3 \, \pm 7.1$ km s$^{-1}$ without pericenter information). Such a shift exacerbates the traditional Too Big to Fail problem. Draco's peak circular velocity range prior to infall narrows from $V_{\rm peak} = 21 - 49$ km s$^{-1}$ without pericenter information to $V_{\rm peak} = 25-37$ km s$^{-1}$ with the constraint. Over the full population of classical dwarf spheroidals, we find no correlation between $V_{\rm peak}$ and stellar mass today, indicative of a high level of stochasticity in galaxy formation at stellar masses below $\sim 10^7$ M$_\odot$. As proper motion measurements for dwarf satellites become more precise, they should enable useful priors on the expected structure and evolution of their host dark matter subhalos.
description: 6 Pages, 4 figures, submitted to MNRAS
Big Data for OPen innovation Energy Marketplace Deliverable 7.5.2 Pilot 5 – Danish pilot description and results
Creators: name: Richaud, Luc
name: Chone, Tanguy
name: Garella, Massimiliano
Publisher: name: Zenodo
Year: 2024

description: The BD4OPEM project aims to design, develop, and deploy a Marketplace in order to provide innovative energy services for the reliable operation of the smart grid. These energy services will be provided through a marketplace, acting as an open, modular data analysis toolbox and facilitating data exchange and advanced usage. In this way, the data coming from the diverse energy domain sources will be put at the disposal of advanced energy service developers through a marketplace. The main objective of WP7 is to oversee the implementation and demonstration of the services developed in the previous WPs. Through this implementation, the aim is to prove two points:

That the tools developed are compliant with the given objectives and, if not, analyse and identify the reason for the difference and provide recommendations about the tool optimization to reach better results.

That the Marketplace platform and the Analytics toolbox permits flexibility, replicability, and scalability of the services between data providers and service users with adapted features.

Overall, this work package consists in providing the input for the analysis of the impact of the whole system developed during BD4OPEM project and giving recommendation to optimise its use and management. It is as well the opportunity to gather feedbacks from different demonstration sites and their respective leaders upon the platform, the services, and the customer experience. This document describes the results of the implementation of the services for the Danish demonstration site.
Asymptotic dynamics on the worldline for spinning particles
Creators: name: Bonocore, Domenico
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There has been a renewed interest in the description of dressed asymptotic states a la Faddeev-Kulish. In this regard, a worldline representation for asymptotic states dressed by radiation at subleading power in the soft expansion, known as the Generalized Wilson Line (GWL) in the literature, has been available for some time, and it recently found applications in the derivation of factorization theorems for scattering processes of phenomenological relevance. In this paper we revisit the derivation of the GWL in the light of the well-known supersymmetric wordline formalism for the relativistic spinning particle. In particular, we discuss the importance of wordline supersymmetry to understand the contribution of the soft background field to the asymptotic dynamics. We also provide a derivation of the GWL for the gluon case, which was not previously available in the literature, thus extending the exponentiation of next-to-soft gauge boson corrections to Yang-Mills theory. Finally, we comment about possible applications in the current research about asymptotic states in scattering amplitudes for gauge and gravity theories and their classical limit.
description: 36 pages, 2 figures
Kudacoryne Maggioni 2021, gen. nov.
Creators: name: Maggioni, Davide
name: Schuchert, Peter
name: Arrigoni, Roberto
name: Hoeksema, Bert W.
name: Huang, Danwei
name: Strona, Giovanni
name: Seveso, Davide
name: Berumen, Michael L.
name: Montalbetti, Enrico
name: Collins, Richard
name: Galli, Paolo
name: Montano, Simone
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Cnidaria
Hydrozoa
Anthoathecata
Sphaerocorynidae
Kudacoryne

description: Kudacoryne Maggioni gen. nov.
http://zoobank.org/ urn:lsid:zoobank.org:act: 8BF43568-3611-402F-A24D-C54B060AA119
Diagnosis: Hydroids like in Sphaerocoryne; medusae unknown.
Genetic diagnosis: 45 molecular diagnostic characters differentiate Kudacoryne from other genera in the family, specifically 12 in the 16S, 17 in the COX1, 14 in the COX3, 1 in the 18S, and 1 in the 28S (table 2).
Etymology: The generic name derives from the combination of ‘Kuda’, meaning ‘little’ in Divehi (Maldivian) language, reflecting the smaller size of polyps compared to other sphaerocorynid species, and - coryne.
Type species: Kudacoryne diaphana Maggioni sp. nov.
description: Published as part of Maggioni, Davide, Schuchert, Peter, Arrigoni, Roberto, Hoeksema, Bert W., Huang, Danwei, Strona, Giovanni, Seveso, Davide, Berumen, Michael L., Montalbetti, Enrico, Collins, Richard, Galli, Paolo & Montano, Simone, 2021, Integrative systematics illuminates the relationships in two sponge-associated hydrozoan families (Capitata: Sphaerocorynidae and Zancleopsidae), pp. 487-525 in Contributions to Zoology 90 on page 500, DOI: 10.1163/18759866-BJA10023, http://zenodo.org/record/8343324
Parallel Regularized Maximum Likelihood Estimation For Proportional Odds Models
Creators: name: McHenry, Jonathan
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: fused lasso
matlab
multi-core
multinomial logistic regression
proportional odds
regularization

description: Ordinal categorical random variables are random variables which take on values from a finite ordered set of possible values. They often result from qualitative assessments, such as rating a movie from one to five stars. Unlike continuous variables whose values are also ordered, ordinal categories are qualitative, so the distance between them may not be well-defined. This work focuses on computational aspects of predicting ordinal categorical random variables. We employ multinomial logistic models as the workhorse of our methodology. Beginning with the proportional odds version of the cumulative logit model, usually called the Proportional Odds Model (POM), we develop a regularized variant of that model. In particular, we study a special case of the generalized L1 regularized POM which we call the Fused Proportional Odds Model (FPOM) because it can result in coefficients whose values are equal, they can be fused together. FPOM incorporates a penalty term composed of a positive combination of terms: the absolute value of each coefficient, the absolute differences of coefficients, and the absolute differences of consecutive intercepts. This penalty makes sense when there is a notion of adjacency among coefficients, as occurs in signal processing, and when reduction of degrees of freedom is desired, e.g., in the context of high dimensional predictors. The geometry of this optimization, convex with edges and points, can aid finding a sparse solution, which is desirable in some contexts. As an illustration, we apply FPOM to a wine quality assessment dataset. We show, using various measures of prediction accuracy, that our model is competitive with other methods that have been applied to this data. Using a simulation, we show that FPOM can be used for variable selection. For many modern problems, especially those involving automated data collection, large quantities of data can be produced. Analyzing this data in a reasonable amount of time can be of practical importance. Accordingly, we study the use of parallel computation to speed up FPOM parameter estimation. Using computational nodes with two multi-core processors, we show that enabling parallel computation can result in an order of magnitude speedup on a single computational node.
Neutrino-antineutrino pair production by a photon in a dense matter
Creators: name: Lobanov, A. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The possibility of radiative effects that are due to interaction of fermions with a dense matter is investigated. Neutrino-antineutrino photo-production is studied. The rate of this process is calculated in the Furry picture. It is demonstrated that this effect does not disappear even if the medium refractive index is assumed to be equal to unity. The rate obtained strongly depends on the polarization states of the particles involved. This leads to evident spatial asymmetries, which may have certain consequences observable in astrophysical and cosmological studies.
description: 10 pages, Latex
Elicitation on transitive verb agreement paradigms
Creators: name: Maldonado Sales, Nelly Idalia Nikte
name: Scott, Tessa
name: Sales, Henry
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mam

description: This is a remote video interview held using Zoom. Henry Sales, a Mam speaker from San Juan Atitán, provides translation between English and Mam using Mam and Spanish.

The elicitation focuses on a full paradigm of the verb il "to see" with various subjects and objects, and a few conjugations of the verb tzyun "to grab".

In this file bundle: 1 Zoom audio/video file, 1 pdf of typed notes.
Knots in a Spinor Bose-Einstein Condensate
Creators: name: Kawaguchi, Yuki
name: Nitta, Muneto
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that knots of spin textures can be created in the polar phase of a spin-1 Bose-Einstein condensate, and discuss experimental schemes for their generation and probe, together with their lifetime.
description: 4 pages, 3 figures