cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Those with blue hair please step forward: An economic theory of group formation and application to Cajas Rurales in Honduras
Creators: name: Elias, Carlos G.
name: Alwang, Jeffrey Roger
name: Elias, Carlos G.
name: Alwang, Jeffrey Roger
Publisher: name: Unknown
Year: 2008
Subjects: Agricultural Finance
Institutional and Behavioral Economics

description: This paper presents an economic model of group formation with an application to data collected from an agricultural credit program in western Honduras. We formulate a simple theory of group formation using the concept of centers of gravity to explain why individuals join a group. According to our theory, prospective members join based on the potential benefits and costs of group membership, and based on their perception of social distance between themselves and other group members. Social distance is unobservable by outsiders but known by the individual: if you are in then you know who has blue hair. Thus, we argue that social distance helps explain preferences for group formation. To test our theory we analyze data collected from members and non-members of PRODERT, a program that has helped create 188 “Cajas Rurales” (CRs). Using conjoint analysis we test for differences in preferences between members and non-members for the main attributes of the CR. We find that members and non-members exhibit similar preferences for the attributes of the CR; therefore non-membership is not related to supply factors. Using information gathered by executing field experiments, we estimate a proxy for social distance. We use this proxy to run a group formation equation and find that it explains, along with individual characteristics, participation in the CR. Finally we offer suggestions on how to balance performance and coverage in programs in which beneficiaries decide who joins. Small cohesive groups may show exceptional performance at the cost of low coverage, and the opposite may be true.
Associations of early life and childhood risk factors with obstructive sleep apnoea in middle-age
Creators: name: Senaratna, Chamara V
name: Lowe, Adrian
name: Walters, E Haydn
name: Abramson, Michael J
name: Bui, Dinh
name: Lodge, Caroline
name: Erbas, Bircan
name: Burgess, John
name: Perret, Jennifer L
name: Hamilton, Garun S
name: Dharmage, Shyamali C
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 32
subject: Biomedical and clinical sciences
classificationCode: 4202
subject: Epidemiology
classificationCode: 3201
subject: Cardiovascular medicine and haematology
classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: Background and Objective: Early-life risk factors for obstructive sleep apnoea (OSA) are poorly described, yet this knowledge may be critical to inform preventive strategies. We conducted the first study to investigate the association between early-life risk factors and OSA in middle-aged adults. Methods: Data were from population-based Tasmanian Longitudinal Health Study cohort (n = 3550) followed from 1st to 6th decades of life. Potentially relevant childhood exposures were available from a parent-completed survey at age 7-years, along with previously characterized risk factor profiles. Information on the primary outcome, probable OSA (based on a STOP-Bang questionnaire cut-off ≥5), were collected when participants were 53 years old. Associations were examined using logistic regression adjusting for potential confounders. Analyses were repeated using the Berlin questionnaire. Results: Maternal asthma (OR = 1.5; 95% CI 1.1–2.0), maternal smoking (OR = 1.2; 1.05, 1.5), childhood pleurisy/pneumonia (OR = 1.3; 1.04, 1.7) and frequent bronchitis (OR = 1.2; 1.01, 1.5) were associated with probable OSA. The risk-factor profiles of ‘parental smoking’ and ‘frequent asthma and bronchitis’ were also associated with probable OSA (OR = 1.3; 1.01, 1.6 and OR = 1.3; 1.01–1.9, respectively). Similar associations were found for Berlin questionnaire-defined OSA. Conclusions: We found novel temporal associations of maternal asthma, parental smoking and frequent lower respiratory tract infections before the age of 7 years with adult OSA. While determination of their pathophysiological and any causal pathways require further research, these may be useful to flag the risk of OSA within clinical practice and create awareness and vigilance among at-risk groups.
Asymptotics in Knuth's parking problem for caravans
Creators: name: Bertoin, Jean
name: Miermont, Grégory Marc
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F17; 60J25

description: We consider a generalized version of Knuth's parking problem, in which caravans consisting of a number of cars arrive at random on the unit circle. Then each car turns clockwise until it finds a free space to park. Extending a recent work by Chassaing and Louchard, we relate the asymptotics for the sizes of blocks formed by occupied spots with the dynamics of the additive coalescent. According to the behavior of the caravan's size tail distribution, several qualitatively different versions of eternal additive coalescent are involved.
description: 18 pages, 2 figures
Effects of Construction Variations Upon Dynamic Moduli of Asphaltic Concrete
Creators: name: Southgate, Herbert F.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: The two variables that most influence the behavior of asphaltic concrete pavements are subgrade modulus and thickness of the asphaltic concrete. Other significant variables are: temperature of the asphaltic concrete, asphaltic concrete modulus, frequency of the dynamic loading, asphalt content by weight in mix, and voids in the asphaltic concrete mix.  During a series of Road Rater tests on a experimental pavement in Kentucky, deflection test data varied widely from expected values. Test data reported by Kallas and Riley permitted the development of an equation relating asphaltic concrete modulus to its temperature and to the frequency of loading. However, after deflection data were adjusted for temperature and frequency, the variation was still greater than expected. Construction records for each test station were examined; the void content and asphalt cement content of the mix were found to vary considerably.
Strain Energy Analysis of Pavement Designs for Heavy Trucks
Creators: name: Southgate, Herbert F.
name: Deen, Robert C.
name: Mayes, Jesse G.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1982
Subjects: subject: Transportation Engineering

description: The first portion of this paper summarizes classical concepts of work, or strain energy, as applied to the analysis of stresses, strains, and deflections under various vehicular load configurations on pavement systems. Controlling equations for strain energy density are presented. When considering strain energy density, strain energy, or work, all components of stresses or strains must be taken into account so that total internal behavior can be evaluated. Previously, pavement thickness design systems have been developed using only a single component of strain, typically at the bottom of the asphaltic concrete layer or at the top of the subgrade. Strain energy concepts permit modifications to thickness design systems to account for the net effect of all components of strains or stresses.  The second portion of this paper illustrates the significance of detailed analyses. Effects of loads and load distributions on vehicles are summarized. One startling result shows the large increase in fatigue rate due to unequal distribution of loads between the two axles of a tandem group relative to the fatigue under an equal load distribution.  A third part of this paper deals with pavement thickness designs for heavily loaded trucks exceeding legal load limits. The effects of those vehicles on interstate pavements are compared to the effects of more normally loaded vehicles.
Does scarcity exacerbate the tragedy of the commons? Evidence from fishers’ experimental responses
Creators: name: Maldonado, Jorge Higinio
name: Moreno-Sanchez, Rocio Del Pilar
name: Maldonado, Jorge Higinio
name: Moreno-Sanchez, Rocio Del Pilar
Publisher: name: Unknown
Year: 2008
Subjects: Resource /Energy Economics and Policy

description: Economic Experimental Games (EEG) have challenged the theoretical prediction showing that individuals balance own and collective interests when making decisions that deviate away from suboptimal Nash equilibrium. However, few studies have analyzed whether these deviations from Nash equilibrium towards social optimum are affected as the stock of resource changes. Performing EEG with real fishers we test the hypothesis that behavior of participants –measured as relative deviations from Nash equilibrium- differs under a situation of abundance versus a situation of scarcity. The design of our EEG is based on a profit maximization model that incorporates intertemporal effects of aggregated extraction. Our findings show that in a situation of scarcity, players over extract the resource making decisions above the Nash equilibrium, obtaining less profit, mining the others-regarding interest, and exacerbating the tragedy of the commons. This result challenges previous general findings from the EEG literature. When individuals face abundance of the resource, however, they deviate downward from the individualistic and myopic behavior prediction. This phenomenon of private inefficient over exploitation is corrected when management strategies are introduced in the game, which underlines the importance of institutions.
Resnet-50 v1.5 PyTorch model
Creators: name: Vilchez, Antonio Tomas Nevado
Publisher: name: Zenodo
Year: 2017

description: Floating point 32 bits precision weights for the Resnet-50 v1.5 PyTorch deep learning model. This file is part of the TorchVision package: https://github.com/pytorch/vision
 TorchVision package license: https://github.com/pytorch/vision/blob/master/LICENSE
 Original file is hosted under the URL: https://download.pytorch.org/models/resnet50-19c8e357.pth
Interplay between superconductivity and non-Fermi liquid at a quantum-critical point in a metal. IV: The $γ$ model and its phase diagram at $1
Creators: name: Wu, Yi-Ming
name: Zhang, Shang-Shun
name: Abanov, Artem
name: Chubukov, Andrey V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this paper we continue our analysis of the interplay between the pairing and the non-Fermi liquid behavior in a metal for a set of quantum-critical (QC) systems with an effective dynamical electron-electron interaction $V(Ω_m) \propto 1/|Ω_m|^γ$ (the $γ$-model). In previous papers we studied the cases $01$ which become critical at $γ\to 2$. First, the density of states evolves towards a set of discrete $δ-$functions. Second, an array of dynamical vortices emerges in the upper frequency half-plane. These two features come about because on a real axis, the real part of the interaction, $V' (Ω) \propto \cos(πγ/2)/|Ω|^γ$, becomes repulsive for $γ>1$, and the imaginary $V^{''} (Ω) \propto \sin(πγ/2)/|Ω|^γ$, gets progressively smaller at $γ\to 2$. The features on the real axis are consistent with the development of a continuum spectrum of $E_{c,n}$ obtained using $Δ_n (ω_m)$ on the Matsubara axis. We consider the case $γ=2$ separately in the next paper.
description: 57 pages, 27 figures. The continuation of arXiv:2004.13220, arXiv:2006.02968 and arXiv:2007.14540
Exciton formation and dissociation in mass-asymmetric electron-hole plasmas
Creators: name: Fehske, H.
name: Filinov, V.
name: Bonitz, M.
name: Fortov, V.
name: Levashov, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: First-principle path integral Monte Carlo simulations were performed in order to analyze correlation effects in complex electron-hole plasmas, particularly with regard to the appearance of excitonic bound states. Results are discussed in relation to exciton formation in unconventional semiconductors with large electron hole mass asymmetry.
description: 8 pages, 4 figures, submitted J.of Phys.: Conference Series
Phonon Casimir effect in polyatomic systems
Creators: name: Lee, Gideon
name: Rodin, Aleksandr
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The phonon Casimir effect describes the phonon-mediated interaction between defects in condensed-matter systems. Using the path-integral formalism, we derive a general method for calculating the Helmholtz free energy due to vibrational modes in systems of arbitrary dimensionality and composition. Our results make it possible to extract the defect interaction energy at any temperature for various defect configurations. We demonstrate our approach in action by performing numerical calculations for mono- and diatomic chains, as well as a diatomic molecule, at zero and finite temperatures and validate our results using exact diagonalization.
description: 12 pages, 8 figures
Business Models and Producer-Owned Ventures: Choices, Challenges, and Changes
Creators: name: Kenkel, Philip L.
name: Park, John L.
name: Kenkel, Philip L.
name: Park, John L.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Institutional and Behavioral Economics
subject: Labor and Human Capital
subject: Cooperative
subject: value-added organizational form

description: Producer-owned business models are rapidly evolving. Producer-owned, value-added ventures face a number of organizational challenges, including capital acquisition, security exchange registration, antitrust exemption, borrowing eligibility, and operational flexibility. This paper examines the success of evolving producer-owned business models in addressing these challenges. The need for uniform criteria to distinguish producer-owned business from other business forms throughout the complex structure of policies and laws affecting value-added ventures is highlighted.
Centrality dependence of charged hadron and strange hadron elliptic flow from sqrt(s_NN) = 200 GeV Au+Au collisions
Creators: name: STAR Collaboration
name: Abelev, B. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present STAR results on the elliptic flow v_2 of charged hadrons, strange and multi-strange particles from sqrt(s_NN) = 200 GeV Au+Au collisions at RHIC. The detailed study of the centrality dependence of v_2 over a broad transverse momentum range is presented. Comparison of different analysis methods are made in order to estimate systematic uncertainties. In order to discuss the non-flow effect, we have performed the first analysis of v_2 with the Lee-Yang Zero method for K_s^0 and Lambda. In the relatively low p_T region, p_T <= 2 GeV/c, a scaling with m_T - m is observed for identified hadrons in each centrality bin studied. However, we do not observe v_2(p_T) scaled by the participant eccentricity to be independent of centrality. At higher p_T, 2 GeV/c <= p_T <= 6 GeV/c, v_2 scales with quark number for all hadrons studied. For the multi-strange hadron Omega, which does not suffer appreciable hadronic interactions, the values of v_2 are consistent with both m_T -m scaling at low p_T and number-of-quark scaling at intermediate p_T. As a function of collision centrality, an increase of p_T-integrated v_2 scaled by the participant eccentricity has been observed, indicating a stronger collective flow in more central Au+Au collisions.
description: 25 pages, as accepted for Phys. Rev. C. The data tables are at http://drupal.star.bnl.gov/STAR/files/starpublications/108/data.html
Body image concerns in women with polycystic ovary syndrome: A systematic review and meta-analysis
Creators: name: Davitadze, Meri
name: Malhotra, Kashish
name: Khalil, Halimah
name: Hebbar, Meghnaa
name: Tay, Chau Thien
name: Mousa, Aya
name: team, PCOS SEva
name: Teede, Helena
name: Brennan, Leah
name: Stener-Victorin, Elisabet
name: Kempegowda, Punith
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 3215
subject: Reproductive medicine
classificationCode: 3202
subject: Clinical sciences
classificationCode: 400304
subject: Biomedical imaging

description: Objective: To assess differences in body image concerns among women with and without polycystic ovary syndrome (PCOS). Design: This is a systematic review and meta-analysis. Methods: Electronic databases (MEDLINE, EMBASE, APA PsychInfo, PUBMED, Web-of-Science Core Collection, and Cochrane Controlled Register of Trials [CENTRAL]) were searched from inception through July 2022. Outcome measures included validated questionnaires reporting on body image concerns. Methodological quality was assessed by the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) system, and included studies were assessed for risk of bias. Meta-analyses were performed using the inverse variance method based on random or fixed effects models (Review Manager, Version 5). Results: A total of 918 women with PCOS and 865 women without PCOS from 9 studies were included. Meta-analysis of 3 studies using Multidimensional Body-Self Relations Questionnaire Appearance Scale (MBSRQ-AS) showed those with PCOS reported higher dissatisfaction with appearance evaluation and appearance orientation compared to those without PCOS (mean difference [MD] = -0.78, I2 = 0%, P < .00001, and MD = 0.22, I2 = 54%, P = .004, respectively). Meta-analysis of 2 studies showed higher dissatisfaction with overweight preoccupation, lower body area satisfaction, and body weight classification on MBSRQ-AS subscales in those with PCOS compared to those without PCOS (all P < .001). Meta-analysis of 2 studies using the Body Esteem Scale for Adolescents and Adults (BESAA) showed significantly lower scores for the weight subscale in those with PCOS compared to those without PCOS (P = .03). Conclusions: Those with PCOS experience more significant body image concerns, emphasising the importance of awareness in the clinical care of PCOS. Considering the limited evidence, further studies are warranted to identify drivers and mitigating factors.
Structured light for ultrafast laser micro- and nanoprocessing
Creators: name: Flamm, Daniel
name: Grossmann, Daniel Günther
name: Sailer, Marc
name: Kaiser, Myriam
name: Zimmermann, Felix
name: Chen, Keyou
name: Jenne, Michael
name: Kleiner, Jonas
name: Hellstern, Julian
name: Tillkorn, Christoph
name: Sutter, Dirk H
name: Kumkar, Malte
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The industrial maturity of ultrashort pulsed lasers has triggered the development of a plethora of material processing strategies. Recently, the combination of these remarkable temporal pulse properties with advanced structured light concepts has led to breakthroughs in the development of novel laser application methods, which will now gradually reach industrial environments. We review the efficient generation of customized focus distributions from the near infrared down to the deep ultraviolet, e.g., based on non-diffracting beams and 3D-beam splitters, and demonstrate their impact for micro- and nanomachining of a wide range of materials. In the beam shaping concepts presented, special attention was paid to suitability for both high energies and high powers.
description: Accepted manuscript, 19 pages, 20 figures and 111 references
Non-classical spin transfer effects in an antiferromagnet
Creators: name: Mitrofanov, Alexander
name: Urazhdin, Sergei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We simulate scattering of electrons by a chain of antiferromagnetically coupled quantum Heisenberg spins, to analyze spin-transfer effects not described by the classical models of magnetism. Our simulations demonstrate efficient excitation of dynamical states that would be forbidden by the semiclassical symmetries, such as generation of multiple magnetic excitation quanta by a single electron. Furthermore, quantum interference of spin wavefunctions enables generation of magnetization dynamics with amplitudes exceeding the transferred magnetic moment. The efficiency of excitation is almost independent of the electron spin polarization, and is governed mainly by the transfer of energy. Non-classical spin transfer may thus enable efficient electronic control of antiferromagnets not limited by the classical constraints.
description: version accepted by Physical Review Letters
Pearling instability of nanoscale fluid flow confined to a chemical channel
Creators: name: Koplik, J.
name: Lo, T. S.
name: Rauscher, M.
name: Dietrich, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the flow of a nano-scale incompressible ridge of low-volatility liquid along a "chemical channel": a long, straight, and completely wetting stripe embedded in a planar substrate, and sandwiched between two extended less wetting solid regions. Molecular dynamics simulations, a simple long-wavelength approximation, and a full stability analysis based on the Stokes equations are used, and give qualitatively consistent results. While thin liquid ridges are stable both statically and during flow, a (linear) pearling instability develops if the thickness of the ridge exceeds half of the width of the channel. In the flowing case periodic bulges propagate along the channel and subsequently merge due to nonlinear effects. However, the ridge does not break up even when the flow is unstable, and the qualitative behavior is unchanged even when the fluid can spill over onto a partially wetting exterior solid region.
description: 17 pages, 12 figures, submitted to Physics of Fluids, fixed equation numbering after Eq. (17)
Rough translation of file 009_A (collection LA 256)
Creators: name: Parker, Verdena
name: Lee-Wynant, Tyler
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-280318-10: Rough translation (minute-by-minute) of 009_A (tape 9, side A) from LA 256 (collection of recordings given to the Berkeley Language Center by Verdena), from start of file to 18:12 - no transcription in this session, translation only. Due to re-numbering, tape 009_A has been assigned to the CLA item number LA256.009, audio file LA256.009A.
Fermion enhanced first-order phase transition and chiral Gross-Neveu tricritical point
Creators: name: Liu, Yuzhi
name: Meng, Zi Yang
name: Yin, Shuai
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The fluctuations of massless Dirac fermion can not only turn a first-order bosonic phase transition (in the Landau sense) to a quantum critical point, but also work reversely to enhance the first-order transition itself, depending on the implementation of finite size effects in the coupling corrections. Here, we report a case study of the latter by employing quantum Monte Carlo simulation upon a lattice model in which the bosonic part featuring the Landau-Devonshire first-order phase transition and Yukawa coupled to the Dirac fermions. We find that the parameter range for the first-order phase transition becomes larger as the Yukawa coupling increases and the microscopic mechanism of this phenomena is revealed, at a quantitative level, as the interplay between the critical fluctuations and the finite-size effects. Moreover, the scaling behavior at the separation point between the first-order and the continuous phase transitions is found to belong to the chiral tricritical Gross-Neveu universality. Our result demonstrates that the interplay of massless Dirac fermions, critical fluctuations and the finite size effects could trigger a plethora of interesting phenomena and therefore great care is called for when making generalizations.
description: 9 pages, 6 figures
Accurate Analytic Model for the Weak Lensing Convergence One-Point Probability Distribution Function and its Auto-Covariance
Creators: name: Thiele, Leander
name: Hill, J. Colin
name: Smith, Kendrick M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The one-point probability distribution function (PDF) is a powerful summary statistic for non-Gaussian cosmological fields, such as the weak lensing (WL) convergence reconstructed from galaxy shapes or cosmic microwave background (CMB) maps. Thus far, no analytic model has been developed that successfully describes the high-convergence tail of the WL convergence PDF for small smoothing scales from first principles. Here, we present a halo-model formalism to compute the WL convergence PDF, building upon our previous results for the thermal Sunyaev-Zel'dovich field. Furthermore, we extend our formalism to analytically compute the covariance matrix of the convergence PDF. Comparisons to numerical simulations generally confirm the validity of our formalism in the non-Gaussian, positive tail of the WL convergence PDF, but also reveal the convergence PDF's strong sensitivity to small-scale systematic effects in the simulations (e.g., due to finite resolution). Finally, we present a simple Fisher forecast for a Rubin-Observatory-like survey, based on our new analytic model. Considering the $\{A_s, Ω_m, Σm_ν\}$ parameter space and assuming a Planck CMB prior on $A_s$ only, we forecast a marginalized constraint $σ(Σm_ν) \approx 0.08$ eV from the WL convergence PDF alone, even after marginalizing over parameters describing the halo concentration-mass relation. This error bar on the neutrino mass sum is comparable to the minimum value allowed in the normal hierarchy, illustrating the strong constraining power of the WL convergence PDF. We make our code publicly available at https://github.com/leanderthiele/hmpdf.
description: 15+4 pages, 11+2 figures, matches PRD published version
How to form a wormhole
Creators: name: Dai, De-Chang
name: Minic, Djordje
name: Stojkovic, Dejan
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide a simple but very useful description of the process of wormhole formation. We place two massive objects in two parallel universes (modeled by two branes). Gravitational attraction between the objects competes with the resistance coming from the brane tension. For sufficiently strong attraction, the branes are deformed, objects touch and a wormhole is formed. Our calculations show that more massive and compact objects are more likely to fulfill the conditions for wormhole formation. This implies that we should be looking for wormholes either in the background of black holes and compact stars, or massive microscopic relics. Our formation mechanism applies equally well for a wormhole connecting two objects in the same universe.
description: 6 pages, 8 figures
Frustrated Heisenberg $J_1-J_2$ model within the stretched diamond lattice of LiYbO2
Creators: name: Bordelon, Mitchell M.
name: Liu, Chunxiao
name: Posthuma, Lorenzo
name: Kenney, Eric
name: Graf, M. J.
name: Butch, N. P.
name: Banerjee, Arnab
name: Calder, Stuart
name: Balents, Leon
name: Wilson, Stephen D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the magnetic properties of LiYbO$_2$, containing a three-dimensionally frustrated, diamond-like lattice via neutron scattering, magnetization, and heat capacity measurements. The stretched diamond network of Yb$^{3+}$ ions in LiYbO$_2$ enters a long-range incommensurate, helical state with an ordering wave vector ${\bf{k}} = (0.384, \pm 0.384, 0)$ that "locks-in" to a commensurate ${\bf{k}} = (1/3, \pm 1/3, 0)$ phase under the application of a magnetic field. The spiral magnetic ground state of LiYbO$_2$ can be understood in the framework of a Heisenberg $J_1-J_2$ Hamiltonian on a stretched diamond lattice, where the propagation vector of the spiral is uniquely determined by the ratio of $J_2/|J_1|$. The pure Heisenberg model, however, fails to account for the relative phasing between the Yb moments on the two sites of the bipartite lattice, and this detail as well as the presence of an intermediate, partially disordered, magnetic state below 1 K suggests interactions beyond the classical Heisenberg description of this material.
description: 17 pages, 11 figures
Using a Balanced Scorecard to Identify Opportunities to Improve Code Review Effectiveness: An Industrial Experience Report
Creators: name: Hasan, Masum
name: Iqbal, Anindya
name: Islam, Mohammad Rafid Ul
name: Rahman, A. J. M. Imtiajur
name: Bosu, Amiangshu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Peer code review is a widely adopted software engineering practice to ensure code quality and ensure software reliability in both the commercial and open-source software projects. Due to the large effort overhead associated with practicing code reviews, project managers often wonder, if their code reviews are effective and if there are improvement opportunities in that respect. Since project managers at Samsung Research Bangladesh (SRBD) were also intrigued by these questions, this research developed, deployed, and evaluated a production-ready solution using the Balanced SCorecard (BSC) strategy that SRBD managers can use in their day-to-day management to monitor individual developer's, a particular project's or the entire organization's code review effectiveness. Following the four-step framework of the BSC strategy, we: 1) defined the operation goals of this research, 2) defined a set of metrics to measure the effectiveness of code reviews, 3) developed an automated mechanism to measure those metrics, and 4) developed and evaluated a monitoring application to inform the key stakeholders. Our automated model to identify useful code reviews achieves 7.88% and 14.39% improvement in terms of accuracy and minority class F1 score respectively over the models proposed in prior studies. It also outperforms human evaluators from SRBD, that the model replaces, by a margin of 25.32% and 23.84% respectively in terms of accuracy and minority class F1 score. In our post-deployment survey, SRBD developers and managers indicated that they found our solution as useful and it provided them with important insights to help their decision makings.
Matrix product state recursion methods for strongly correlated quantum systems
Creators: name: Tian, Yifan
name: White, Steven R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a method for extrapolation of real-time dynamical correlation functions which can improve the capability of matrix product state methods to compute spectral functions. Unlike the widely used linear prediction method, which ignores the origin of the data being extrapolated, our recursion methods utilize a representation of the wavefunction in terms of an expansion of the same wavefunction and its translations at earlier times. This recursion method is exact for a noninteracting Fermi system. Surprisingly, the recursion method is also more robust than linear prediction at large interaction strength. We test this method on the Hubbard two-leg ladder and present more accurate results for the spectral function than previous studies.
description: 14 pages, 16 figures
Large momentum part of fermions with large scattering length
Creators: name: Tan, Shina
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It is well known that the momentum distribution of the two-component Fermi gas with large scattering length has a tail proportional to $1/k^4$ at large $k$. We show that the magnitude of this tail is equal to the adiabatic derivative of the energy with respect to the reciprocal of the scattering length, multiplied by a simple constant. This result holds at any temperature (as long as the effective interaction radius is negligible) and any large scattering length; it also applies to few-body cases. We then show some more connections between the $1/k^4$ tail and various physical quantities, in particular the rate of change of energy in a DYNAMIC sweep of the inverse scattering length.
description: 11 pages, 1 figure; a typo corrected
Classical and ab initio preparation of reliable structures for polymeric coordination compounds
Creators: name: Jeschke, Harald O.
name: Salguero, L. Andrea
name: Valenti, Roser
name: Buchsbaum, Christian
name: Schmidt, Martin U.
name: Wagner, Matthias
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The detailed investigation of electronic and magnetic properties of polymeric coordination materials with accurate ab initio quantum mechanical methods is often computationally extremely demanding because of the large number of atoms in the unit cell. Moreover, usually the available structural data are insufficient or poorly determined, especially when the structure contains hydrogen atoms. In order to be able to perform controlled ab initio calculations on reliable structures, we use a two-step approach to systematically prepare model structures for polymeric coordination compound systems and to relax them to their equilibrium configuration. First, a structure is constructed on the basis of a crystallographic database and optimized by force field methods; in the second step, the structure is relaxed by ab initio quantum mechanical molecular dynamics. With this structure, we perform accurate electronic structure calculations. We will apply this procedure to a Fe(II) triazole compound and to a coordination polymer of Cu(II) ions with 2,5-bis(pyrazol-1-yl)-1,4-dihydroxybenzene.
description: 7 pages, 5 eps figures; proceedings of the symposium on "Spin- and charge-correlations in molecule-based materials", October 2005, Koenigstein (Taunus), Germany, final version
Neutrino dispersion in external magnetic fields
Creators: name: Kuznetsov, A. V.
name: Mikheev, N. V.
name: Raffelt, G. G.
name: Vassilevskaya, L. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the neutrino self-energy operator Sigma (p) in the presence of a magnetic field B. In particular, we consider the weak-field limit e B << m_\ell^2, where m_\ell is the charged-lepton mass corresponding to the neutrino flavor ν_\ell, and we consider a "moderate field" m_\ell^2 << e B << m_W^2. Our results differ substantially from the previous literature. For a moderate field, we show that it is crucial to include the contributions from all Landau levels of the intermediate charged lepton, not just the ground-state. For the conditions of the early universe where the background medium consists of a charge-symmetric plasma, the pure B-field contribution to the neutrino dispersion relation is proportional to (e B)^2 and thus comparable to the contribution of the magnetized plasma.
description: 9 pages, 1 figure, revtex. Version to appear in Phys. Rev. D (presentation improved, reference list revised, numerical error in Eq.(41) corrected, conclusions unchanged)
How to determine model Hamiltonians for strongly correlated materials
Creators: name: Lepetit, Marie-Bernadette
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The present paper reviews recent achievements on the ab initio determination of effective model Hamiltonians aimed at the description of strongly correlated materials. These models (Heisenberg, $t-J$, extended Hubbard, Kondo, etc) are crucial to solid state physicists for the description and understanding of the electronic remarkable properties such as magnetic orders, photo-induced magnetism, transport properties, high $t\_c$ super conductivity, etc. We will see how the association and the control of embedding techniques, fragment spectroscopy, effective or intermediate Hamiltonian theories, provides a systematic and well controlled method for the determination of trustworthy models Hamiltonians.
Incoherent Quantum Control
Creators: name: Pechen, Alexander
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Conventional approaches for controlling open quantum systems use coherent control which affects the system's evolution through the Hamiltonian part of the dynamics. Such control, although being extremely efficient for a large variety of problems, has limited capabilities, e.g., if the initial and desired target states have density matrices with different spectra or if a control field needs to be designed to optimally transfer different initial states to the same target state. Recent research works suggest extending coherent control by including active manipulation of the non-unitary (i.e., incoherent) part of the evolution. This paper summarizes recent results specifically for incoherent control by the environment (e.g., incoherent radiation or a gaseous medium) with a kinematic description of controllability and landscape analysis.
description: Contribution to the 28-th Conference on Quantum Probability and Related Topics, CIMAT-Guanajuato, MEXICO, 2-8 September 2007 (final version, minor editing)
Direct formation of nitrogen-vacancy centers in nitrogen doped diamond along the trajectories of swift heavy ions
Creators: name: Lake, Russell E.
name: Persaud, Arun
name: Christian, Casey
name: Barnard, Edward S.
name: Chan, Emory M.
name: Bettiol, Andrew A.
name: Tomut, Marilena
name: Trautmann, Christina
name: Schenkel, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Accelerator Physics (physics.acc-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report depth-resolved photoluminescence measurements of nitrogen-vacancy (NV$^-$) centers formed along the tracks of swift heavy ions (SHIs) in type Ib synthetic single crystal diamonds that had been doped with 100 ppm nitrogen during crystal growth. Analysis of the spectra shows that NV$^-$ centers are formed preferentially within regions where electronic stopping processes dominate and not at the end of the ion range where elastic collisions lead to formation of vacancies and defects. Thermal annealing further increases NV yields after irradiation with SHIs preferentially in regions with high vacancy densities. NV centers formed along the tracks of single swift heavy ions can be isolated with lift-out techniques for explorations of color center qubits in quasi-1D registers with an average qubit spacing of a few nanometers and of order 100 color centers per micrometer along 10 to 30 micrometer long percolation chains.
Kondo Regime of a Quantum Dot Molecule: A Finite-U Slave-Boson Approach
Creators: name: Vernek, E.
name: Sandler, N.
name: Ulloa, S. E.
name: Anda, E. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the electronic transport in a double quantum dot structure connected to leads in the Kondo regime for both series and parallel arrangements. By applying a finite-U slave boson technique in the mean field approximation we explore the effect of level degeneracy in the conductance through the system. Our results show that for the series connection, as the energy difference of the localized dot levels increases, the tunneling via the Kondo state is destroyed. For the parallel configuration, we find an interesting interplay of state symmetry and conductance. Our results are in good agrement with those obtained with other methods, and provide additional insights into the physics of the Kondo state in the double dot system.
description: 4 pages, 5 figures, to appear in Physica E
$\mathcal{N}=1$ Curves on Generalized Coulomb Branches
Creators: name: Bourton, Thomas
name: Pomoni, Elli
name: Zhang, Xinyu
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2021
Subjects: energy: low
mass: deformation
coupling: gauge
gauge field theory: supersymmetry
Coulomb
M-theory
Riemann surface
ultraviolet
infrared

description: We study the low energy effective dynamics of four-dimensional $\mathcal{N}=1$ supersymmetric gauge theories of class $\mathcal{S}_k$ on the generalized Coulomb branch. The low energy effective gauge couplings are naturally encoded in algebraic curves $\mathcal{X}$, which we derive for general values of the couplings and mass deformations. We then recast these IR curves $\mathcal{X}$ to the UV or M-theory form $\mathcal{C}$: the punctured Riemann surfaces on which the six-dimensional $\mathcal{N}=(1,0)$${A_{k-1}}$ SCFTs are compactified giving the class $\mathcal{S}_k$ theories. We find that the UV curves $\mathcal{C}$ and their corresponding meromorphic differentials take the same form as those for their mother four-dimensional $\mathcal{N}=2$ theories of class $\mathcal{S}$. They have the same poles, and their residues are functions of all the exactly marginal couplings and the bare mass parameters which we can compute exactly.
XX and Ising limits in integral formulae for finite temperature correlation functions of the XXZ chain
Creators: name: Göhmann, Frank
name: Seel, Alexander
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a multiple integral representation for a one-parameter generating function of the finite temperature $S^z$-$S^z$ correlation functions of the antiferromagnetic spin-1/2 XXZ chain in the XX limit and in the Ising limit. We show how in these limits the multiple integrals reduce to single integrals, thereby reproducing known results.
description: 16 pages, Contribution to the proceedings of the International Workshop on Classical and Quantum Integrable Systems, Dubna, January 24-28, 2005
ИСПОЛЬЗОВАНИЕ ЗАГАДОК ПРИ ИЗУЧЕНИИ РУССКОГО ЯЗЫКА КАК ИНОСТРАННОГО
Creators: name: Раджабова, Любовь
Publisher: name: Zenodo
Year: 2024

description: В данной статье рассматривается вопрос о происхождении загадок, об их роли в традициях русского народа, раскрывается их содержательная сторона для использования на занятиях при изучении русского языка как иностранного.
TEACHING PHILOSOPHY AND ITS ROLE IN EDUCATIONAL DEVELOPMENT
Creators: name: Muratova, Marfa
name: Tongotarova, Gulchehra
name: Barnoyev, Jahongir
name: Taniyev, To'lqin
Publisher: name: Zenodo
Year: 2024

description: This article is devoted to the problems of teaching philosophy in higher educational institutions, understanding the role of philosophy in modern society and in the education system. It is shown that, despite the presence of philosophy as a compulsory discipline of the basic part of the curriculum, it can be stated that there is no holistic image of its teaching. In this regard, views are outlined on the search for new approaches to teaching philosophical disciplines, taking into account the specifics of philosophical knowledge
A Study of Computer Anxiety among Teacher Trainees considering Gender and Geographic Disparities
Creators: name: MORE, VINAYAK
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 390113
subject: Science, technology and engineering curriculum and pedagogy
classificationCode: 390303
subject: Higher education
classificationCode: 390305
subject: Professional education and training
classificationCode: 390307
subject: Teacher education and professional development of educators
classificationCode: 390406
subject: Gender, sexuality and education
classificationCode: 390412
subject: Teacher and student wellbeing
classificationCode: 390405
subject: Educational technology and computing

description: The study investigates the levels of computer anxiety among Diploma in Education (D.Ed.) student-teachers in Pune, Maharashtra, with a focus on gender and geographic disparities. Utilizing the Computer Anxiety Rating Scale (CARS), data were collected from a sample of 206 student-teachers. The findings reveal that a majority (68.93%) experience medium levels of computer anxiety, with notable proportions experiencing low (16.99%) and high (14.04%) anxiety levels. Female student-teachers exhibit higher medium anxiety (71.65%) compared to males (63.89%), while males show a higher prevalence of high anxiety (19.44%). Geographic analysis indicates that urban student-teachers are more likely to experience low anxiety (25.42%) compared to rural counterparts (13.61%), who are more prone to high anxiety (17.69%). These patterns persist when examining sub-groups, with rural female student-teachers notably experiencing higher levels of anxiety. The study underscores the need for targeted interventions to address computer anxiety, particularly among male and rural student-teachers, to enhance their readiness and confidence in integrating technology into their future classrooms.
Duality between Coronavirus Transmission and Air-based Macroscopic Molecular Communication
Creators: name: Schurwanz, Max
name: Hoeher, Peter Adam
name: Bhattacharjee, Sunasheer
name: Damrath, Martin
name: Stratmann, Lukas
name: Dressler, Falko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Biological sciences

description: This contribution exploits the duality between a viral infection process and macroscopic air-based molecular communication. Airborne aerosol and droplet transmission through human respiratory processes is modeled as an instance of a multiuser molecular communication scenario employing respiratory-event-driven molecular variable-concentration shift keying. Modeling is aided by experiments that are motivated by a macroscopic air-based molecular communication testbed. In artificially induced coughs, a saturated aqueous solution containing a fluorescent dye mixed with saliva is released by an adult test person. The emitted particles are made visible by means of optical detection exploiting the fluorescent dye. The number of particles recorded is significantly higher in test series without mouth and nose protection than in those with a wellfitting medical mask. A simulation tool for macroscopic molecular communication processes is extended and used for estimating the transmission of infectious aerosols in different environments. Towards this goal, parameters obtained through self experiments are taken. The work is inspired by the recent outbreak of the coronavirus pandemic.
description: 9 pages, 6 figures, submitted to IEEE Transactions on Molecular, Biological, and Multi-Scale Communications for the special issue "Section II: Molecular Communications for Diagnostics and Therapeutic Development of Infectious Diseases"