cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Time-Dependent Turbulent Heating of Open Flux Tubes in the Chromosphere, Corona, and Solar Wind
Creators: name: Woolsey, Lauren N.
name: Cranmer, Steven R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate several key questions of plasma heating in open-field regions of the corona that connect to the solar wind. We present results for a model of Alfven-wave-driven turbulence for three typical open magnetic field structures: a polar coronal hole, an open flux tube neighboring an equatorial streamer, and an open flux tube near a strong-field active region. We compare time-steady, one-dimensional turbulent heating models (Cranmer et al., 2007) against fully time-dependent three-dimensional reduced-magnetohydrodynamics modeling of BRAID (van Ballegooijen et al., 2011). We find that the time-steady results agree well with time-averaged results from BRAID. The time-dependence allows us to investigate the variability of the magnetic fluctuations and of the heating in the corona. The high-frequency tail of the power spectrum of fluctuations forms a power law whose exponent varies with height, and we discuss the possible physical explanation for this behavior. The variability in the heating rate is bursty and nanoflare-like in nature, and we analyze the amount of energy lost via dissipative heating in transient events throughout the simulation. The average energy in these events is 10^21.91 erg, within the "picoflare" range, and many events reach classical "nanoflare" energies. We also estimated the multithermal distribution of temperatures that would result from the heating-rate variability, and found good agreement with observed widths of coronal differential emission measure (DEM) distributions. The results of the modeling presented in this paper provide compelling evidence that turbulent heating in the solar atmosphere by Alfven waves accelerates the solar wind in open flux tubes.
description: 13 pages, 15 figures; accepted to The Astrophysical Journal
An Analysis of the Working Relationships Between In-House and Outsourced Sports Marketing Departments in Division I-A College Athletics
Creators: name: Driscoll, Gregory J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: The purpose of this study was to examine the working relationships between the inhouse and outsourced marketing groups of major NCAA Division I athletics programs. Forty-four outsourced general managers (GMs) and 39 senior in-house marketing administrators (SMAs) participated for a response rate of 69.2%. Descriptive analysis indicated the firms were similar in regards to office location, amount of contact, work experience, and pressure. The data also indicated possible inherent differences between the outsourced and in-house realms. Actual outsourced pressure exceeded in-house pressure, and the GMs and SMAs tended to overstate their counterparts' pressure levels. Also, GMs had more experience working in-house than SMAs had working for outsourced firms. Responses from GMs and SMAs indicated a healthy relationship despite the presence of the arms race in college athletics, as each group exhibited tendencies of conceding portions of their own ideals for the benefit of the overall working relationship.
On the $ππ$-scattering lengths in the theory with effective Lagrangian
Creators: name: Shabalin, E. P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Use of the effective Lagrangian incorporating both the scalar and pseudoscalar mesons gives a possibility to calculate the $ππ$-scattering lengths without attraction of the ChPT theory.
description: 7 pages, 0 figures
Development, implementation, and evaluation of a vascular access management program
Creators: name: Kane, Danielle A.
Publisher: name: No Publisher Supplied
Year: 2022

description: Purpose: Intravenous (IV) cannulation is a standard procedure associated with a high failure rate. To improve IV access techniques, this quality improvement project implemented a Vascular Access Management Program including the modified Adult Difficult IntraVenous Access tool (A-DIVA) and ultrasound to guide IV placement with the overall goal to improve IV access success.Methods: The program included didactic and simulation training followed by implementation and evaluation. Evaluation included an anonymous Likert-type survey evaluating the usefulness of the tool, impact on productivity, the effectiveness of ultrasound, and the perceived sustainability of the program. Outcomes were analyzed and reported as the mean and standard deviation. Results: Key findings of this project include the highly favorable feedback regarding the simplicity and efficiency of the modified A-DIVA tool and the usefulness it provided in identifying high-risk patients. Additionally, this project shed light on the importance of thorough education to enable competency in the use of advanced technologies such as ultrasound to guide IV access. Conclusion: Overall, this project successfully developed, implemented, and evaluated the vascular access management program and outcomes support a change in practice to include these techniques to ultimately improve patient care.
Frustrated Heisenberg antiferromagnet on the honeycomb lattice with spin quantum number $s \geq 1$
Creators: name: Li, P H Y
name: Bishop, R F
name: Campbell, C E
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ground-state (GS) phase diagram of the frustrated spin-$s$ $J_{1}$--$J_{2}$--$J_{3}$ Heisenberg antiferromagnet on the honeycomb lattice is studied using the coupled cluster method, for spin quantum numbers $s=1,\,\frac{3}{2},\,2\,,\frac{5}{2}$. We study the case $J_{3}=J_{2}=κJ_{1}$, in the range $0 \leq κ\leq 1$, which includes the point of maximum classical ($s \to \infty$) frustration, viz., the classical critical point at $κ_{\rm cl}=\frac{1}{2}$, separating the Néel phase for $κ< κ_{\rm cl}$ and the collinear striped AFM phase for $κ> κ_{\rm cl}$. Results are presented for the GS energy, magnetic order parameter and plaquette valence-bond crystal (PVBC) susceptibility. For all spins $s \geq \frac{3}{2}$ we find a quantum phase diagram very similar to the classical one, with a direct first-order transition between the two collinear AFM states at a value $κ_{c}(s)$ which is slightly greater than $κ_{\rm cl}$ [e.g., $κ_{c}(\frac{3}{2}) \approx 0.53(1)$] and which approaches it monotonically as $s \to \infty$. By contrast, for the case $s=1$ the transition is split into two such that the stable GS phases are ones with Néel AFM order for $κ< κ_{c_{1}} = 0.485(5)$ and with striped AFM order for $κ> κ_{c_{2}} = 0.528(5)$, just as in the case $s=\frac{1}{2}$ (for which $κ_{c_{1}} \approx 0.47$ and $κ_{c_{2}} \approx 0.60$). For both the $s=\frac{1}{2}$ and $s=1$ models the transition at $κ_{c_{2}}$ appears to be of first-order type, while that at $κ_{c_{1}}$ appears to be continuous. However, whereas in the $s=\frac{1}{2}$ case the intermediate phase appears to have PVBC order over the entire range $κ_{c_{1}} < κ< κ_{c_{2}}$, in the $s=1$ case PVBC ordering either exists only over a very small part of the region or, more likely, is absent everywhere.
The Convex Hull of the Highest Weight Orbit and the Carathéodory Orbitope
Creators: name: Redding, Nigel
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2017
Subjects: Orbitopes
Representation Theory

description: In this thesis, we study the polynomial equations that describe the highest weight orbit of an irreducible finite dimensional highest weight module under a semisimple Lie group. We also study the connection of the convex hull of this orbit and the Carathéodory orbitope.
title: Cognitive and affective benefits of an animated pedagogical agent: Considering contextual relevance and aesthetics
Creators: name: Veletsianos, George
Publisher: name: Journal of Educational Computing Research
Year: 2007
Subjects: Aesthetics
Computer animation

description: Choi and Clark (2006) argue that learning is attributed to the instructional method rather than the specific medium used to deliver instruction (i.e. the pedagogical agent). Additionally, they consider pedagogical agents as unnecessarily expensive tools, whose instructional affordances can be replicated by less expensive options. In this response to Choi and Clark (2006), I argue that pedagogical agents are not a new iteration of the media debate because the anthropomorphous features and social affordances of pedagogical agents elicit psychological responses from learners that other media cannot educe. As such, when considering the implementation of pedagogical agents, researchers need to consider the agent’s (a) contextual relevance, and (b) aesthetic properties. It is important to note that none of these factors influence the instructional method used to deliver instruction via a pedagogical agent.
The effect of changes in individual communication behaviors during PREP on couples' risk for becoming maritally distressed
Creators: name: Aldridge, William Allen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: The recent findings of Schilling, Baucom, Burnett, Allen, and Ragland (2003) and Baucom, Hahlweg, Engl, Thurmaier, and Schilling (in press) suggest that increasing female positive communication or decreasing female negative communication during the Prevention and Relationship Enhancement Program (PREP) may increase risk for marital distress among program participants. The current investigation re-examines the couples studied by Schilling et al., using ratings on individual communication behaviors, not composite communication scores, to predict risk for marital distress in both males and females participating in a weekend version of PREP. Results suggest that increasing females' clear and constructive communication, decreasing their argument-encouraging behaviors, or decreasing their denial behaviors increases risk for distress in PREP participants. Results concerning male individual communication behaviors as well as participants' initial risk for marital distress are also discussed and new hypotheses regarding the effects of communication change in PREP females on risk for marital distress are outlined.
Spatial control of laser-induced doping profiles in graphene on hexagonal boron nitride
Creators: name: Neumann, Christoph
name: Rizzi, Leo
name: Reichardt, Sven
name: Terrés, Bernat
name: Khodkov, Timofiy
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Beschoten, Bernd
name: Stampfer, Christoph
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a method to create and erase spatially resolved doping profiles in graphene-hexagonal boron nitride (hBN) heterostructures. The technique is based on photo-induced doping by a focused laser and does neither require masks nor photo resists. This makes our technique interesting for rapid prototyping of unconventional electronic device schemes, where the spatial resolution of the rewritable, long-term stable doping profiles is only limited by the laser spot size (~600 nm) and the accuracy of sample positioning. Our optical doping method offers a way to implement and to test different, complex doping patterns in one and the very same graphene device, which is not achievable with conventional gating techniques.
Moving Walls and Geometric Phases
Creators: name: Facchi, Paolo
name: Garnero, Giancarlo
name: Marmo, Giuseppe
name: Samuel, Joseph
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We unveil the existence of a non-trivial Berry phase associated to the dynamics of a quantum particle in a one dimensional box with moving walls. It is shown that a suitable choice of boundary conditions has to be made in order to preserve unitarity. For these boundary conditions we compute explicitly the geometric phase two-form on the parameter space. The unboundedness of the Hamiltonian describing the system leads to a natural prescription of renormalization for divergent contributions arising from the boundary.
description: 16 pages, 5 figures
Hubble Space Telescope Astrometry of the Procyon System
Creators: name: Bond, Howard E.
name: Gilliland, Ronald L.
name: Schaefer, Gail H.
name: Demarque, Pierre
name: Girard, Terrence M.
name: Holberg, Jay B.
name: Gudehus, Donald
name: Mason, Brian D.
name: Kozhurina-Platais, Vera
name: Burleigh, Matthew R.
name: Barstow, Martin A.
name: Nelan, Edmund P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The nearby star Procyon is a visual binary containing the F5 IV-V subgiant Procyon A, orbited in a 40.84 yr period by the faint DQZ white dwarf Procyon B. Using images obtained over two decades with the Hubble Space Telescope, and historical measurements back to the 19th century, we have determined precise orbital elements. Combined with measurements of the parallax and the motion of the A component, these elements yield dynamical masses of 1.478 +/- 0.012 Msun and 0.592 +/- 0.006 Msun for A and B, respectively. The mass of Procyon A agrees well with theoretical predictions based on asteroseismology and its temperature and luminosity. Use of a standard core-overshoot model agrees best for a surprisingly high amount of core overshoot. Under these modeling assumptions, Procyon A's age is ~2.7 Gyr. Procyon B's location in the H-R diagram is in excellent agreement with theoretical cooling tracks for white dwarfs of its dynamical mass. Its position in the mass-radius plane is also consistent with theory, assuming a carbon-oxygen core and a helium-dominated atmosphere. Its progenitor's mass was 1.9-2.2 Msun, depending on its amount of core overshoot. Several astrophysical puzzles remain. In the progenitor system, the stars at periastron were separated by only ~5 AU, which might have led to tidal interactions and even mass transfer; yet there is no direct evidence that these have occurred. Moreover the orbital eccentricity has remained high (~0.40). The mass of Procyon B is somewhat lower than anticipated from the initial-to-final-mass relation seen in open clusters. The presence of heavy elements in its atmosphere requires ongoing accretion, but the place of origin is uncertain.
description: Accepted by Astrophysical Journal
Early Athlete Sport Specialization and the Impact on Play and Burnout Mentalities in Division I College Athletes
Creators: name: Leeke, Rachel
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: In recent years, the National Collegiate Athletic Association has stated an increased focus on health and wellness. It is important to understand an athlete’s mental outlook in an effort to impede the likelihood of burnout as a result of negative sport experience. This study’s focus is to assess the student-athlete's perspective as they approach their sport by examining the age of sport specialization and other independent variables.  Doing so can aid coaches in instituting more targeted measures (i.e. team bonding events, alteration of coaching style, etc.) in order for students to get the most out of their athletic experience. Additionally, understanding mitigating factors such as when an athlete started sport, gender, individual v. team sport and revenue v. Olympic sport factors could influence future parenting decisions and encourage sport-governing bodies to provide recommendations for better mental health accommodations.  The creation of the Play Mentalities Instrument (PMI-20) used in conjunction with the Athlete Burnout Questionnaire filled an important gap in research examining collegiate athletes mentalities toward their sport considering no study has combined the two measures to gain perspective on the mindset of Division I athletes.  As a result, an inverse relationship was uncovered between play and burnout.
Non-linear two-photon resonance fluorescence on a single artificial atom
Creators: name: Ardelt, P. -L.
name: Koller, M.
name: Simmet, T.
name: Hanschke, L.
name: Bechtold, A.
name: Regler, A.
name: Wierzbowski, J.
name: Riedl, H.
name: Müller, K.
name: Finley, J. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report two-photon resonance fluorescence of an individual semiconductor artificial atom. By non-linearly driving a single quantum dot via a two-photon transition, we probe the linewidth of the two-photon processes and show that, similar to their single-photon counterparts, they are close to being Fourier limited at low temperatures. The evolution of the population of excitonic states with the Rabi frequency exhibits a clear s-shaped behavior, indicative of the non-linear response via the two-photon excitation process. We model the non-linear response using a 4-level atomic system representing the manifold of excitonic and biexcitonic states of the quantum dot and show that quantitative agreement is obtained only by including the interaction with LA-phonons in the solid state environment. Finally, we demonstrate the formation of dressed states emerging from a two-photon interaction between the artificial atom and the excitation field. The non-linear optical dressing induces a mixing of all four excitonic states that facilitates the tuning of the polarization selection rules of the artificial atom.
title: Reproducing Taint-Analysis Results with ReproDroid
Creators: name: Pauck, Felix
name: Bodden, Eric
name: Wehrheim, Heike
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: Android Taint Analysis||Tools||Benchmarks||Empirical Studies||Reproducibility

description: More and more Android taint-analysis tools appear each year. Any paper proposing such a tool typically comes with an in-depth evaluation of its supported features, accuracy and ability to be applied on real-world apps. Although the authors spent a lot of effort to come up with these evaluations, comparability is often hindered since the description of their experimental targets is usually limited. To conduct a comparable, automatic and unbiased evaluation of different analysis tools, we propose the framework ReproDroid. The framework enables us to precisely declare our evaluation targets, in consequence we refine three well-known benchmarks: DroidBench, ICCBench and DIALDroidBench. Furthermore, we instantiate this framework for six prominent taint-analysis tools, namely Amandroid, DIALDroid, DidFail, DroidSafe, FlowDroid and IccTA. Finally, we use these instances to automatically check whether different promises commonly made in the associated proposing papers are kept.
Luminescence of photochromic centers in calcium fluoride crystals doped with Lu$^{3+}$ ions
Creators: name: Shendrik, Roman
name: Myasnikova, Alexandra
name: Sizova, Tatiana
name: Radzhabov, Evgeny
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report data on the luminescence spectra associated with photochromic centers in X-ray irradiated calcium fluoride crystals doped with Lu ions. Irradiation in low energy photochromic centers absorption band excites emission, which can be identify with transitions into photochromic centers. Ab initio calculation of absorption spectrum of photochromic center agrees rather well with experimental data.
SOLO editorial and publishing platform based on ARPHA
Creators: name: Penev, Lyubomir
name: Georgiev, Teodor
name: Stoev, Pavel
name: Metodiev, Teodor
name: Mehandzhiyski, Nikolay
name: Mietchen, Daniel
Publisher: name: Zenodo
Year: 2023

description: This repo contains a presentation given at the SOLO kick-off meeting, 17 – 19 January 2023, in Leipzig, Germany. It sketches out the development of the ARPHA-based publishing platform that the project will use to share its outcomes.
Three octave spanning supercontinuum by red-shifted dispersive wave in photonic crystal fibers
Creators: name: Sharma, Mohit
name: Konar, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: This paper presents a three layer index guided lead silicate (SF57) photonic crystal fiber which simultaneously promises to yield large effective optical nonlinear coefficient and low anomalous dispersion that makes it suitable for supercontinuum generation. At an operating wavelength 1550 nm, the typical optimized value of anomalous dispersion and effective nonlinear coefficient turns out to be ~4 ps/km/nm and ~1078 W^(-1) km^(-1), respectively. Through numerical simulation it is realized that the designed fiber promises to exhibit three octave spanning supercontinuum from 900 to 7200 nm by using 50 fs sech optical pulses of 5 kW peak power. Due to the cross-phase modulation and four-wave mixing processes, a long range of red-shifted dispersive wave generated, which assist to achieve such large broadening. In addition, we have investigated the compatibility of supercontinuum generation with input pulse peak power increment and briefly discussed the impact of nonlinear processes on supercontinuum generation.
description: 10 pages, 16 figures
Multivariate analysis of the globular clusters in M87
Creators: name: Das, Sukanta
name: Chattopadhyay, Tanuka
name: Davoust, Emmanuel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: 85-08

description: An objective classification of 147 globular clusters in the inner region of the giant elliptical galaxy M87 is carried out with the help of two methods of multivariate analysis. First independent component analysis is used to determine a set of independent variables that are linear combinations of various observed parameters (mostly Lick indices) of the globular clusters. Next K-means cluster analysis is applied on the independent components, to find the optimum number of homogeneous groups having an underlying structure. The properties of the four groups of globular clusters thus uncovered are used to explain the formation mechanism of the host galaxy. It is suggested that M87 formed in two successive phases. First a monolithic collapse, which gave rise to an inner group of metal-rich clusters with little systematic rotation and an outer group of metal-poor clusters in eccentric orbits. In a second phase, the galaxy accreted low-mass satellites in a dissipationless fashion, from the gas of which the two other groups of globular clusters formed. Evidence is given {\bf for a blue stellar population in the more metal rich clusters, which we interpret by Helium enrichment.} Finally, it is found that the clusters of M87 differ in some of their chemical properties (NaD, TiO1, light element abundances) from globular clusters in our Galaxy and M31.
description: 19 pages, 10 figures,Accepted in Publications of The Astronomical Society of Australia
Dis-owning Knowledge: Anarchist Intervention in Intellectual Property Rights
Creators: name: Shank, Cara Elizabeth
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Several streams of contemporary activism oppose hegemonic concepts of privatized property and question ownership of intellectual production. In this paper I focus on anarchist contributions to this discussion. I examine an American anarchist perspective, as it is expressed in both the content and writing practices of a contemporary anarchist publication, the Crimethinc Ex-Workers Collective's Days of War, Nights of Love. Through analysis of the book, I infer anarchist engagement with knowledge as a commons, and trace the philosophy that anyone can produce art, writing, and other tasks often relegated to an expert. My questions are: What are contemporary anarchist conceptions of private property? How is the anarchist objection, or challenge, to private property articulated in the debate over intellectual property? How does Crimethinc understand Days of War, Nights of Love as a form of direct action?
Analog Optical Computing Primitives in Silicon Photonics
Creators: name: Jiang, Yunshan
name: DeVore, Peter T. S.
name: Jalali, Bahram
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical computing accelerators may help alleviate bandwidth and power consumption bottlenecks in electronics. We show an approach to implementing logarithmic-type analog co-processors in silicon photonics and use it to perform the exponentiation operation. The function is realized by exploiting nonlinear-absorption-enhanced Raman amplification saturation in a silicon waveguide.
Medication adherence among outpatient congestive heart failure patients
Creators: name: Wohlgemuth, Courtney E.
Publisher: name: No Publisher Supplied
Year: 2022

description: Purpose of Project: Poor medication adherence is a multi-factorial problem among heart failure (HF) patients due to comorbidities including polypharmacy management (Shah et al., 2015). The purpose of this project is to determine if the use of an educational video, a self-management tool, in conjunction with a pillbox will improve patient adherence to medication and disease management. The intervention is designed to increase their knowledge about HF management, including lifestyle and medication adherence, as well as early symptom recognition while collaborating with a primary healthcare provider. Methodology: A quasi-experimental study with a pre/post survey, a 7-minute educational heart failure video, a self-medication form, and the use of a pillbox over thirty days. Evaluation of adherence was measured by the pre/post surveys. Descriptive and inferential tests using IBM SPSS Statistics version 25 were used to perform a McNemar and Chi-Square test.Results: There was a statistical significance showing improved medication adherence with the use of the pillbox among the heart failure population.Implications for Practice: This model can be used for heart failure patients when used in conjunction with a primary health care provider, an educational video, a self-medication form, and a pillbox.
On the analysis of stage I in the resistivity recovery of electron irradiated iron
Creators: name: Apostolopoulos, G.
name: Kotsina, Z.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The experimental results of Takaki et al. [1] on the stage I resistivity recovery of electron irradiated iron are analyzed using the analytical theory of diffusion annealing formulated by Simpson & Sossin [2] and Schroeder [3] taking into account the recent first-principles calculations of Fu et al. [4] regarding the mobility of interstitials. Excellent agreement between theory and experiment is obtained by a minimal set of adjustable parameters. The results show that the diffusion annealing equations can be successfully employed for the analysis of recovery experiments in iron.
description: 8 pages, 3 figures
Degenerate integrability of quantum spin Calogero--Moser systems
Creators: name: Reshetikhin, N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The main result of this note is the proof of degenerate quantum integrability of quantum spin Calogero--Moser systems and the description of the spectrum of quantum Hamiltonians in terms of the decomposition of tensor products of irreducible representations of corresponding Lie algebra.
description: 15 pages
Quantum physics and the beam splitter mystery
Creators: name: Henault, Francois
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Optical lossless beam splitters are frequently encountered in fundamental physics experiments regarding the nature of light, including "which-way" determination of light particles, N. Bohr's complementarity principle, or the EPR paradox and all their measurement apparatus. Although they look as common optical components at first glance, their behaviour remains somewhat mysterious since they apparently exhibit stand-alone particle-like features, and then wave-like characteristics when inserted into a Mach-Zehnder interferometer. In this communication are examined and discussed some basic properties of these beamssplitters, both from a classical optics and quantum physics point of view. Herein some convergences and contradictions are highlighted, and the results of a few emblematic experiments demonstrating photon existence are discussed. An alternative empirical model in wave optics is also proposed in order to shed light on some remaining questions
description: 15 pages
Periodic perturbations of unbounded Jacobi matrices I: Asymptotics of generalized eigenvectors
Creators: name: Świderski, Grzegorz
name: Trojan, Bartosz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 47B25, 47B36, 42C05 (Primary), 60J80 (Secondary)

description: We study asymptotics of generalized eigenvectors associated with Jacobi matrices. Under weak conditions on the coefficients we identify when the matrices are self-adjoint and show that they satisfy strong non-subordinacy condition.
description: 34 pages
28 GHz and 73 GHz Millimeter-Wave Indoor Propagation Measurements and Path Loss Models
Creators: name: Deng, Sijia
name: Samimi, Mathew K.
name: Rappaport, Theodore S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper presents 28 GHz and 73 GHz millimeter- wave propagation measurements performed in a typical office environment using a 400 Megachip-per-second broadband sliding correlator channel sounder and highly directional steerable 15 dBi (30 degrees beamwidth) and 20 dBi (15 degrees beamwidth) horn antennas. Power delay profiles were acquired for 48 transmitter-receiver location combinations over distances ranging from 3.9 m to 45.9 m with maximum transmit powers of 24 dBm and 12.3 dBm at 28 GHz and 73 GHz, respectively. Directional and omnidirectional path loss models and RMS delay spread statistics are presented for line-of-sight and non-line-of-sight environments for both co- and cross-polarized antenna configurations. The LOS omnidirectional path loss exponents were 1.1 and 1.3 at 28 GHz and 73 GHz, and 2.7 and 3.2 in NLOS at 28 GHz and 73 GHz, respectively, for vertically-polarized antennas. The mean directional RMS delay spreads were 18.4 ns and 13.3 ns, with maximum values of 193 ns and 288 ns at 28 GHz and 73 GHz, respectively.
description: 7 pages, 9 figures, 2015 IEEE International Conference on Communications (ICC), ICC Workshops
Periodic perturbations of unbounded Jacobi matrices II: Formulas for density
Creators: name: Świderski, Grzegorz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 42C05 (Primary)

description: We give formulas for the density of the measure of orthogonality for orthonormal polynomials with unbounded recurrence coefficients. The formulas involve limits of appropriately scaled Turán determinants or Christoffel functions. Exact asymptotics of the polynomials and numerical examples are also provided.
description: 21 pages, 2 figures, 2 tables
Exploring the speciation continuum of slow worms: Location and extent of the Anguis fragilis/veronensis hybrid zone in southeastern France
Creators: name: Dufresnes, Christophe
name: Sourrouille, Patricia
name: Olivier, Anthony
name: Ballouard, Jean-Marie
name: Leccia, Marie-France
name: Tiné, Rémi
name: Cheylan, Marc
name: Henanff, Maxime Le
name: Nicolas, Jean
name: Caron, Sébastien
name: Massez, Grégoire
name: Cluchier, Alexandre
name: Levasseur, Romain
name: Pille, Fabien
name: Peyre, Olivier
name: Thibault, Marc
name: Crottini, Angelica
name: Fuento, Nicolas
name: Crochet, Pierre-André
Publisher: name: Brill Online
Year: 2023
Subjects: Ecology not elsewhere classified

description: With five currently recognized species that form several secondary contact zones, slow worms (Anguidae: Anguis) offer a valuable model to study the fate of evolutionary lineages in the face of hybridization and genetic introgression. The relationships between the Western Slow Worm Anguis fragilis and the Italian Slow Worm Anguis veronensis are particularly puzzling. Their respective distributions remain poorly known on the edges of their parapatric ranges, as both species lack external differentiation. Contra earlier mitochondrial phylogenies, new phylogenomic inferences have shown that A. fragilis and A. veronensis are sister taxa, thus casting doubts on their specific status. In this study, we analyze the A. fragilis/veronensis transition in southeastern France, based on one mitochondrial (ND2) and two nuclear (PRLR and HA1) genetic markers in 81 specimens from 61 localities. The ranges of A. fragilis and A. veronensis roughly extends northwest and southeast of the Rhône-Durance valleys, respectively, with clear signs of introgressive hybridization in the areas of contact (notably the eastern parts of the low Rhône valley). Based on the three molecular markers analyzed, gene flow does not seem to reach outside the narrow hybrid zone, which likely indicates (incomplete) intrinsic reproductive isolation. Hence, we provisionally suggest maintaining A. veronensis as a separate species from A. fragilis. More generally, patterns of genetic divergence, external differentiation, and hybridization (both historical and contemporary) in Anguis ssp. supports a speciation continuum spanning from cryptic, genetically compatible alloparapatric lineages to phenotypically distinct, deeply diverged and fully reproductively isolated taxa able to coexist in sympatry.
Study 1: Tracking the developmental trajectory of auditory discrimination in preschool-aged children
Creators: name: Williams, Rondeline
name: Frank, Michael
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Developmental Psychology
subject: Child Psychology
subject: Cognitive Psychology
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: This study explores young children's auditory discrimination skills under changing sound levels.
3 neutrino mass experiments fit a strange 3 + 3 model, but will KATRIN reveal the model's unique 3-part signature?
Creators: name: Ehrlich, Robert
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Evidence is presented in support of an unconventional $3+3$ model of the neutrino mass eigenstates with specific $m^2>0$ and $m^2<0$ masses. The two large $m^2>0$ masses of the model were originally suggested based on a SN 1987A analysis, and they were further supported by several dark matter fits. The new evidence for one of the $m^2>0$ mass values comes from an analysis of published data from the $\emph{three}$ most precise tritium $β-$decay experiments. The KATRIN experiment by virtue of a unique 3-part signature should either confirm or reject the model in its entirety.
Globular clusters and their contribution to the formation of the Galactic halo
Creators: name: Carretta, Eugenio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This is a "biased" review because I will show recent evidence on the contribution of globular clusters (GCs) to the halo of our Galaxy seen through the lens of the new paradigm of multiple populations in GCs. I will show a few examples where the chemistry of multiple populations helps to answer hot questions including whether and how much GCs did contribute to the halo population, if we have evidence of the GCs-halo link, what are the strengths and weak points concerning this contribution.
description: invited review to appear in Proc. IAU Symp. 317, XXIXth IAU General Assembly, August 2015, Honolulu (HI, USA); eds. A. Bragaglia, M. Arnaboldi, M. Rejkuba, D. Romano, (7 pages, 4 figures, LaTeX, using iau.cls)
Clinical Balance Assessments for Older Adults: An Analysis of Cognitive Function
Creators: name: Bomberger, Stephanie Allene
Publisher: name: University of North Carolina at Chapel Hill
Year: 2012

description: In the elderly, functional decline is most often diagnosed with performance assessments for physical function without any neuropsychological testing. Purpose: To investigate the relationship between cognitive function and physical performance assessments in elderly volunteers. Methods: Age-adjusted linear and multiple regressions were run between assessments of cognitive function (Symbol Digit Modalities Test) and balance (Single-Leg Stance Test, SLS; Tandem Stance Test, TS; Four Square Step Test, FSST), mobility (Gait Velocity from the 10-Meter Walk Test, 10MWT), and strength (Timed Chair Rise Test, TCR). Results: Independent of age, nearly 28% of SDMT scores were uniquely explained by FSST (rpart = 0.278, p = 0.002) and Gait Velocity (rpart = 0.253, p = 0.005). None of the other variables attained statistical significance. Conclusions: In the clinical setting, FSST and Gait Velocity can be used to gather information regarding both physical and cognitive functionality in elderly individuals.
Endotrivial representations of finite groups and equivariant line bundles on the Brown complex
Creators: name: Balmer, Paul
Publisher: name: arXiv
Year: 2015
Subjects: subject: Group Theory (math.GR)
subject: Algebraic Topology (math.AT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20C20, 55N91

description: We relate endotrivial representations of a finite group in characteristic p to equivariant line bundles on the simplicial complex of non-trivial p-subgroups, by means of weak homomorphisms.
description: 12 pages
Student Engagement Strategies in Undergraduate Nursing Education: A Scoping Review Protocol
Creators: name: Iduye, Damilola
Publisher: name: Open Science Framework
Year: 2022

description: Objective: The objective of this scoping review is to identify and chart teaching strategies that educators use in classroom settings to engage diverse students in undergraduate nursing education programs. Introduction: Student engagement is critical to facilitating academic success and significant learning experiences for undergraduate nursing students. However, students from diverse backgrounds face challenges in undergraduate nursing programs, and these challenges impact their academic engagement and sense of belonging and inclusion. Creating conditions in nursing education that foster engagement by meeting the learning needs of diverse learners could facilitate their success, which ultimately might strengthen the nursing workforce diversity. Inclusion criteria: This review will consider papers on how educators engage undergraduate nursing students from diverse backgrounds in classroom settings, including online, face-to-face, and blended formats, irrespective of the country. Evidence obtained from all sources including qualitative, quantitative, and mixed methods studies, systematic reviews, as well as gray literature will be considered for inclusion. Methods: JBI methodology for scoping reviews, which includes a three-step search strategy, will be employed. First, keywords will be identified from relevant articles in CINAHL and ERIC. Second, another search using the identified keywords and index terms across select databases will be conducted. Third, the reference lists of all identified articles will be screened for additional papers. Titles and abstracts will be screened by two independent reviewers, and then followed by the full text review of included articles against the inclusion criteria by two independent reviewers. Data will be extracted from included articles and the findings will be presented in tables, figures, and narratively as appropriate. Keywords: Diversity; nursing education; student engagement; teaching; undergraduate
A fast and intuitive method for calculating dynamic network reconfiguration and node flexibility
Creators: name: Chinichian, Narges
name: Kruschwitz, Johann D.
name: Reinhardt, Pablo
name: Palm, Maximilian
name: Wellan, Sarah A.
name: Erk, Susanne
name: Heinz, Andreas
name: Walter, Henrik
name: Veer, Ilya M.
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit
subject: task-based fMRI
subject: dynamic functional connectivity
subject: network neuroscience
subject: template-based flexibility
subject: community detection
subject: dynamical network analysis
subject: modular structure

description: Dynamic interactions between brain regions, either during rest or performance of cognitive tasks, have been studied extensively using a wide variance of methods. Although some of these methods allow elegant mathematical interpretations of the data, they can easily become computationally expensive or difficult to interpret and compare between subjects or groups. Here, we propose an intuitive and computationally efficient method to measure dynamic reconfiguration of brain regions, also termed flexibility. Our flexibility measure is defined in relation to an a-priori set of biologically plausible brain modules (or networks) and does not rely on a stochastic data-driven module estimation, which, in turn, minimizes computational burden. The change of affiliation of brain regions over time with respect to these a-priori template modules is used as an indicator of brain network flexibility. We demonstrate that our proposed method yields highly similar patterns of whole-brain network reconfiguration (i.e., flexibility) during a working memory task as compared to a previous study that uses a data-driven, but computationally more expensive method. This result illustrates that the use of a fixed modular framework allows for valid, yet more efficient estimation of whole-brain flexibility, while the method additionally supports more fine-grained (e.g. node and group of nodes scale) flexibility analyses restricted to biologically plausible brain networks.
A Long Shadow of Childhood Disadvantage on Late-Life Health Trajectories in China
Creators: name: Xu, Zhenhua
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Childhood disadvantage casts a long shadow on health trajectories over the life course, but little is known on how these associations vary by birth cohorts. This paper examines whether childhood disadvantage is associated with health trajectories and how cohort effects moderate the associations among Chinese elderly. Drawn data from the Chinese Longitudinal Healthy Longevity Survey (CLHLS), I find inadequate access to health care, poor nutrition and no schooling during childhood are associated with poor health in late life, while birth in rural areas and having a father with lower occupational status are associated with better health. Cross-over health trajectories by birth cohorts indicate that being born in rural areas and having father in low SES are advantageous for older cohorts but disadvantageous among younger cohorts. Residential stratified analysis suggest that China’s rapid economic growth and unprecedented social inequality since late 1970s shaped late-life health distinctively for rural and rural elderly.
OLONITE QUESTIONNAIRE, SURVEY AND OBSERVATION RESPONSE EXTRACT
Creators: name: OLONITE, Oluyemi Ayodele
Publisher: name: Zenodo
Year: 2022
Subjects: Olonite Questionnaire Response Extract, Olonite Survey Response Extract, Olonite Observation Extract, OQRE, OSRE, OOEX. OQSOTRE, UNOQESRET

description: Many research have only focused on a single way of analysing the collected data when other available data are available. This study proposes a template for researchers who intend to use either the qualitative or quantitative means in extracting data for analysis. The template shows the unified Olonite Questionnaire, Survey and Observation Response Extract Template (UNOQESRET) in which the first segment of the template shows the Olonite Questionnaire Response Extract (OQRE) the second segment shows the Olonite Survey Response Extract (OSRE) while the third segment captured the Olonite Observation Extract (OOEX). The UNOQESRE entails the OQRE, OSRE and the OOEX for research that entails both qualitative and quantitative. This paper recommends the Olonite Questionnaire, Survey and Observation Response Extract Template (UNOQESRET) for researchers who probably might need to extract information on a question-answer format, surveys and observation in a single research for possible triangulation.
Implementation barriers for mHealth for non-communicable diseases prevention and management in low and middle income countries: a survey among implementers
Creators: name: van Olmen, Josefien
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: implementation research
subject: LMIC
subject: mhealth

description: A two-stage web-based survey on implementation barriers was performed within a NCD research network and through two online platforms on mHealth.
OLONITE SURVEY RESPONSE EXTRACT (OSRE)
Creators: name: OLONITE, Oluyemi Ayodele
Publisher: name: Zenodo
Year: 2022
Subjects: Olonite Survey Response Extract, OSRET, Researcher, Data Collection

description: Many researchers have only focused on a single way of extracting needed data when other methods are available. This study proposes a template for researchers who intend to use the quantitative means in extracting data for analysis which is called the Olonite Survey Response Extract Template (OSRET)
description: Oluyemi Ayodele OLONITE