cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Accurate simulation estimates of cloud points of polydisperse fluids
Creators: name: Buzzacchi, Matteo
name: Sollich, Peter
name: Wilding, Nigel B.
name: Mueller, Marcus
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We describe two distinct approaches to obtaining cloud point densities and coexistence properties of polydisperse fluid mixtures by Monte Carlo simulation within the grand canonical ensemble. The first method determines the chemical potential distribution $μ(σ)$ (with $σ$ the polydisperse attribute) under the constraint that the ensemble average of the particle density distribution $ρ(σ)$ matches a prescribed parent form. Within the region of phase coexistence (delineated by the cloud curve) this leads to a distribution of the fluctuating overall particle density n, p(n), that necessarily has unequal peak weights in order to satisfy a generalized lever rule. A theoretical analysis shows that as a consequence, finite-size corrections to estimates of coexistence properties are power laws in the system size. The second method assigns $μ(σ)$ such that an equal peak weight criterion is satisfied for p(n)$ for all points within the coexistence region. However, since equal volumes of the coexisting phases cannot satisfy the lever rule for the prescribed parent, their relative contributions must be weighted appropriately when determining $μ(σ)$. We show how to ascertain the requisite weight factor operationally. A theoretical analysis of the second method suggests that it leads to finite-size corrections to estimates of coexistence properties which are {\em exponentially small} in the system size. The scaling predictions for both methods are tested via Monte Carlo simulations of a novel polydisperse lattice gas model near its cloud curve, the results showing excellent quantitative agreement with the theory.
description: 8 pages, 6 figures
Hall resistivity of granular metals
Creators: name: Kharitonov, M. Yu.
name: Efetov, K. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the Hall conductivity $\sig_{xy}$ and resistivity $ρ_{xy}$ of a granular system at large tunneling conductance $g_{T}\gg 1$. We show that in the absence of Coulomb interaction the Hall resistivity depends neither on the tunneling conductance nor on the intragrain disorder and is given by the classical formula $ρ_{xy}=H/(n^* e c)$, where $n^*$ differs from the carrier density $n$ inside the grains by a numerical coefficient determined by the shape of the grains. The Coulomb interaction gives rise to logarithmic in temperature $T$ correction to $ρ_{xy}$ in the range $\Ga \lesssim T \lesssim \min(g_T E_c,\ETh)$, where $\Ga$ is the tunneling escape rate, $E_c$ is the charging energy and $\ETh$ is the Thouless energy of the grain.
description: 4 pages, 1 figure
Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
Creators: name: Vasilev, Teodor Borislavov
name: Bouhmadi-López, Mariam
name: Martín-Moruno, Prado
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the possibility of a scalar field being the fundamental description of dark energy. We focus on shift-symmetric scalar-tensor theories since this symmetry potentially avoids some fine-tuning problems. We also restrict attention to theories satisfying that the propagation speed of gravitational waves is equal to the speed of light. These considerations lead us to investigate shift-symmetric Kinetic Gravity Braiding theories. Analysing the stability of scalar linear perturbations, we discuss the conditions that seems to be necessary to describe (super) accelerated cosmic expansion without introducing instabilities. However, it has been previously established that the linearised analysis does not guarantee the stability of this non-canonical scalar theory, as potentially dangerous interactions between dark energy fluctuations and tensor perturbations (essentially gravitational waves) appear at a higher order in perturbation theory. Indeed, although we shall point out that the standard proof of absence of dark energy stable braiding models due to this interaction has a possible way-out, we find general arguments suggesting that there are no dark energy stable solutions that can exploit this loophole. Thus, we discuss future research directions for finding viable fundamental descriptions of dark energy. We also provide a dictionary between the covariant version of the scalar field theory and that of the Effective Field Theory approach, explicitly computing the parameters in the latter formalism in terms of the functions appearing in the covariant version, and its derivatives. To the best of our knowledge, this is the first time these expressions are explicitly obtained up-to arbitrary order in perturbation theory.
description: 21 pages, 6 figures. v2: 22 pages, references added, typos corrected, minor changes in the text, no physics changes. This version accepted for publication in Physics of the Dark Universe
Assessment of Long-Term Outcomes of Lower Limb Fractures Managed by Non-orthopaedic Specialist Surgeons in Rural Rwanda: A Pilot Feasibility Study
Creators: name: Velin, Lotta
name: Zhuang, Alex
name: Bigirimana, Simon P.
name: Wladis, Andreas
name: Mfura, Heritier
name: Hakizimana, Jean-Bertrand A.
name: Barrett, Ellen
name: Barth, Cornelia Anne
name: Bekele, Abebe
name: Riviello, Robert
name: Meunier, Andreas
name: Niyinkunda, Innocent
name: Iradakunda, Jules
name: Alayande, Barnabas T.
Publisher: name: Springer Nature
Year: 2025
Subjects: Physical Medicine & Rehabilitation
Trauma
Orthopedics east africa
functional and clinical outcome
functional disability
health-related quality of life
long-term outcome
low-and middle-income country
lower extremity trauma

description: Introduction Sub-Saharan Africa is disproportionately affected by injuries, and short-term morbidity and mortality are high in this context. Lower limb fractures (LLFs) are a common type of injury that can lead to severe disability with extensive negative social and economic consequences. However, little is known about the long-term outcomes of LLFs in sub-Saharan Africa. In this pilot study, we describe the feasibility of assessing epidemiological patterns of LLFs, the state of care, and long-term outcomes in rural Rwanda. Methods This study was conducted from July to December 2021. It consists of retrospective data collection from hospital charts and a cross-sectional, phone-based follow-up. Functional outcomes were assessed using the World Health Organization Disability Assessment Schedule (WHODAS; World Health Organization, Geneva, Switzerland) 2.0, and health-related quality of life (QoL) was assessed using a 36-Item Short Form Health Survey questionnaire (SF-36). Results Eighteen patients were included in the study, of which the majority were males (n=11, 61%), young adults (mean age 29, standard deviation (SD) 25), and without any previous comorbidities (n=16, 89%). Most patients had a single fracture, although nearly one-third presented with multi-trauma (n=5, 28%). The most common injury cause was falls (n=10, 56%). Fractures were most common in the femur/hip (n=10, 56%), and most fractures were closed (n=14, 78%) and non-comminuted (n=9, 50%). Disability was described as high, with a total mean WHODAS summary score of 80 (SD 29), whereas health-related QoL varied across the SF-36 domains, with "general health" being the lowest rated domain with a mean score of 30 (SD 25). Conclusion This study highlights the challenges of long-term follow-up after LLFs in a rural, low-resource setting but demonstrates that such a study is feasible if planned with contextual considerations. Self-perceived disability is high, and health-related QoL is low at long-term follow-up, which should be viewed in light of the fact that it primarily affects a young, previously healthy population.
The inside-out formation of nuclear discs and the absence of old central spheroids in barred galaxies of the TIMER survey
Creators: name: Bittner, Adrian
name: Sánchez-Blázquez, Patricia
name: Gadotti, Dimitri A.
name: Neumann, Justus
name: Fragkoudi, Francesca
name: Coelho, Paula
name: de Lorenzo-Cáceres, Adriana
name: Falcón-Barroso, Jesús
name: Kim, Taehyun
name: Leaman, Ryan
name: Martín-Navarro, Ignacio
name: Méndez-Abreu, Jairo
name: Pérez, Isabel
name: Querejeta, Miguel
name: Seidel, Marja K.
name: van de Ven, Glenn
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The centres of disc galaxies host a variety of structures built via both internal and external processes. In this study, we constrain the formation and evolution of these central structures, in particular nuclear rings and nuclear discs, by deriving maps of mean stellar ages, metallicities and [$α$/Fe] abundances. We use observations obtained with the MUSE integral-field spectrograph for the TIMER sample of 21 massive barred galaxies. Our results indicate that nuclear discs and nuclear rings are part of the same physical component, with nuclear rings constituting the outer edge of nuclear discs. All nuclear discs in the sample are clearly distinguished based on their stellar population properties. As expected in the picture of bar-driven secular evolution, nuclear discs are younger, more metal-rich, and show lower [$α$/Fe] enhancements, as compared to their immediate surroundings. Moreover, nuclear discs exhibit well-defined radial gradients, with ages and metallicities decreasing, and [$α$/Fe] abundances increasing with radius out to the nuclear ring. Often, these gradients show no breaks from the edge of the nuclear disc until the centre, suggesting that these structures extend to the very centres of the galaxies. We argue that continuous (stellar) nuclear discs may form from a series of bar-built (initially gas-rich) nuclear rings that grow in radius, as the bar evolves. In this picture, nuclear rings are simply the (often) star-forming outer edge of nuclear discs. Finally, by combining our results with those from a accompanying kinematic study, we do not find evidence for the presence of large, dispersion-dominated components in the centres of these galaxies. This could be a result of quiet merger histories, despite the large galaxy masses, or perhaps high angular momentum and strong feedback processes preventing the formation of these kinematically hot components.
description: Accepted for publication in A&A; 29 pages, 12 figures, 1 table, including 3 appendices; FITS files with the derived (spatially-resolved) mean stellar population properties (age, metallicity, and [$\alpha$/Fe] abundance) for all TIMER galaxies are available at https://www.muse-timer.org/data
Islands in the landscape
Creators: name: Clifton, T.
name: Linde, Andrei
name: Sivanandam, Navin
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The string theory landscape consists of many metastable de Sitter vacua, populated by eternal inflation. Tunneling between these vacua gives rise to a dynamical system, which asymptotically settles down to an equilibrium state. We investigate the effects of sinks to anti-de Sitter space, and show how their existence can change probabilities in the landscape. Sinks can disturb the thermal occupation numbers that would otherwise exist in the landscape and may cause regions that were previously in thermal contact to be divided into separate, thermally isolated islands.
description: 31 pages, 8 figures
On the Relevance of Cross-project Learning with Nearest Neighbours for Commit Message Generation
Creators: name: Etemadi, Khashayar
name: Monperrus, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Commit messages play an important role in software maintenance and evolution. Nonetheless, developers often do not produce high-quality messages. A number of commit message generation methods have been proposed in recent years to address this problem. Some of these methods are based on neural machine translation (NMT) techniques. Studies show that the nearest neighbor algorithm (NNGen) outperforms existing NMT-based methods, although NNGen is simpler and faster than NMT. In this paper, we show that NNGen does not take advantage of cross-project learning in the majority of the cases. We also show that there is an even simpler and faster variation of the existing NNGen method which outperforms it in terms of the BLEU_4 score without using cross-project learning.
A family of representations of braid groups on surfaces
Creators: name: An, Byung Hee
name: Ko, Ki Hyoung
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F36, 20F10

description: We propose a family of new representations of the braid groups on surfaces that extend linear representations of the braid groups on a disc such as the Burau representation and the Lawrence-Krammer-Bigelow representation.
description: 21 pages, 4 figures
Strong Noninertial Radiative Shifts in Atomic Spectra at Low Accelerations
Creators: name: Arya, Navdeep
name: Stargen, D. Jaffino
name: Lochan, Kinjalk
name: Goyal, Sandeep K.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Despite numerous proposals investigating various properties of accelerated detectors in different settings, detecting the Unruh effect remains challenging due to the typically weak signal at achievable accelerations. For an atom with frequency gap $ω_0$, accelerated in free space, significant acceleration-induced modification of properties like transition rates and radiative energy shifts requires accelerations of the order of $ω_0 c$. In this paper, we make the case for a suitably modified density of field states to be complemented by a judicious selection of the system property to be monitored. We study the radiative energy-level shift in inertial and uniformly accelerated atoms coupled to a massless quantum scalar field inside a cylindrical cavity. Uniformly accelerated atoms experience thermal correlations in the inertial vacuum, and the radiative shifts are expected to respond accordingly. We show that the noninertial contribution to the energy shift can be isolated and significantly enhanced relative to the inertial contribution by suitably modifying the density of field modes inside a cylindrical cavity. Moreover, we demonstrate that monitoring the radiative energy shift, as compared to transition rates, allows us to reap a stronger purely-noninertial signal. We find that a purely-noninertial radiative shift as large as 50 times the inertial energy shift can be obtained at small, experimentally achievable accelerations ($ a \sim 10^{-9} ω_{0} c$) if the cavity's radius $R$ is specified with a relative precision of $δR/R_{0} \sim 10^{-7}$. Given that radiative shifts for inertial atoms have already been measured with high accuracy, we argue that the radiative energy-level shift is a promising observable for detecting Unruh thermality with current technology.
description: 8+7 pages, 4 figures
Canonical X-Ray Fluorescence Line Intensities as Column Density Indicators
Creators: name: Rahin, Roi
name: Behar, Ehud
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-ray line fluorescence is ubiquitous around powerful accretion sources, namely active galactic nuclei and X-ray binaries. The brightest and best-studied line is the Fe K$α$ line at $λ= 1.937$Å(6.4\,keV). This paper presents a survey of all well-measured Chandra/HETG grating spectra featuring several K$α$ fluorescence lines from elements between Mg and Ni. Despite the variety of sources and physical conditions, we identify a common trend that dictates the K$α$ line intensity ratios between elements. For the most part, the line intensities are well described by a simple, plane-parallel approximation of a near-neutral, solar-abundance, high column density ($N_{\textrm{H}} > 10^{24}$ cm$^{-2}$) medium. This approximation gives canonical photon-intensity line ratios for the K$α$ fluorescence of all elements, e.g., 0.104:\,0.069:\,1.0:\,0.043 for Si:\,S:\,Fe:\,Ni, respectively. Deviations from these ratios are shown to be primarily due to excess column density along the line of sight beyond the Galactic column. Therefore, measured fluorescence line ratios provide an independent estimate of $N_{\textrm{H}}$ and insight into the environment of accretion sources. Residual discrepancies with the canonical ratios could be due to a variety of effects such as a fluorescing medium with $N_{\textrm{H}} < 10^{24}$\,cm$^{-2}$, a non-neutral medium, variations in the illuminating spectrum, non-solar abundances, or an irregular source geometry. However, evidently and perhaps surprisingly, these are uncommon, and their effect remains minor.
description: Submitted to ApJ, comments welcome
Adaptive Compression of Massive MIMO Channel State Information with Deep Learning
Creators: name: Mismar, Faris B.
name: Kaya, Aliye Özge
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper proposes the use of deep autoencoders to compress the channel information in a \review{massive} multiple input and multiple output (MIMO) system. Although autoencoders perform lossy compression, they still have adequate usefulness when applied to massive MIMO system channel state information (CSI) compression. To demonstrate their impact on the CSI, we measure the performance of the system under two different channel models for different compression ratios. We disclose a few practical considerations in using autoencoders for this propose. We show through simulation that the run-time complexity of this deep autoencoder is irrelative to the compression ratio and thus an adaptive compression rate is feasible with an optimal compression ratio depending on the channel model and the signal to noise ratio.
description: 5 pages, 7 figures, submitted to IEEE Network Letters SI on Advances in AI for 6G Networks, September 2024
Areal Foliation and AVTD Behavior in T^2 Symmetric Spacetimes with Positive Cosmological Constant
Creators: name: Clausen, Adam
name: Isenberg, James
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prove a global foliation result, using areal time, for T^2 symmetric spacetimes with a positive cosmological constant. We then find a class of solutions that exhibit AVTD behavior near the singularity.
description: 15 pages, 0 figures, 2 references added
Resonant x-ray scattering study of charge-density wave correlations in YBa$_{2}$Cu$_{3}$O$_{6+x}$ under uniaxial stress
Creators: name: Nakata, S.
name: Betto, D.
name: Schierle, E.
name: Hameed, S.
name: Liu, Y.
name: Kim, H. -H.
name: Souliou, S. M.
name: Lacmann, T.
name: Fürsich, K.
name: Loew, T.
name: Weschke, E.
name: Mackenzie, A. P.
name: Hicks, C. W.
name: Tacon, M. Le
name: Keimer, B.
name: Minola, M.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a comprehensive study of the uniaxial stress response of charge-density-wave (CDW) correlations in detwinned single crystals of the high temperature superconductor YBa$_2$Cu$_3$O$_{6+x}$ (YBCO$_{6+x}$) with $0.40 \leq x \leq 0.93$ (hole-doping levels $0.072 \leq p \leq 0.168$) by means of Cu $L_3$-edge resonant energy-integrated x-ray scattering (REXS). We show that the influence of uniaxial stress is strongly doping dependent: the quasi-two-dimensional CDW is enhanced by in-plane uniaxial stress in a wide hole doping range ($0.45 \leq x \leq 0.80$), but only barely affected in the most underdoped and optimally doped samples ($x = 0.40$ and 0.93), where the CDW correlation length is minimal. A stress-induced three-dimensionally long-range ordered (3D) CDW was observed only in YBCO$_{6.50}$ and YBCO$_{6.67}$. The temperature dependence of the 3D CDW clearly indicates a strong competition with superconductivity. Based on the systematic strain-, doping-, and temperature-dependent REXS measurements reported here, we discuss the relationship between charge order and superconductivity in YBCO$_{6+x}$ and other cuprates.
description: 11 pages, 10 figures
Additional file 1 of Longitudinal DNA methylation dynamics as a practical indicator in clinical epigenetics
Creators: name: Komaki, Shohei
name: Ohmomo, Hideki
name: Hachiya, Tsuyoshi
name: Sutoh, Yoichi
name: Ono, Kanako
name: Furukawa, Ryohei
name: Umekage, So
name: Otsuka-Yamasaki, Yayoi
name: Tanno, Kozo
name: Sasaki, Makoto
name: Shimizu, Atsushi
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Figures. S1–S13.
Low-Complexity Interference Cancellation Algorithms for Detection in Media-based Modulated Uplink Massive-MIMO Systems
Creators: name: Mandloi, Manish
name: Gurjar, Devendra Singh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Media-based modulation (MBM) is a novel modulation technique that can improve the spectral efficiency of the existing wireless systems. In MBM, multiple radio frequency (RF) mirrors are placed near the transmit antenna(s) and are switched ON/OFF to create different channel fade realizations. In such systems, additional information is conveyed through the ON/OFF status of RF mirrors along with conventional modulation symbols. A challenging task at the receiver is to detect the transmitted information symbols and extract the additional information from the channel fade realization used for transmission. In this paper, we consider a massive MIMO (mMIMO) system where each user relies on MBM for transmitting information to the base station, and investigate the problem of symbol detection at the base station. First, we propose a mirror activation pattern (MAP) selection based modified iterative sequential detection algorithm. With the proposed algorithm, the most favorable MAP is selected, followed by the detection of symbol corresponding to the selected MAP. Each solution is subjected to the reliability check before getting the update. Next, we introduce a $K$ favorable MAP search based iterative interference cancellation (KMAP-IIC) algorithm. In particular, a selection rule is introduced in KMAP-IIC for deciding the set of favorable MAPs over which iterative interference cancellation is performed, followed by a greedy update scheme for detecting the MBM symbols corresponding to each user. Simulation results show that the proposed detection algorithms exhibit superior performance-complexity trade-off over the existing detection techniques in MBM-mMIMO systems.
description: 26 pages, 12 figures. Telecommun Syst (2021)
The effectiveness of visualization as a strategy to teach intramuscular injection administration to nursing students
Creators: name: Klimek, Connie Marie
Publisher: name: University of British Columbia
Year: 2009

description: Visualization is a technique researched extensively in a variety of disciplines for its effects on psychomotor skill learning. Although the results of such studies support the use of visualization as a teaching strategy, the effectiveness of using visualization in psychomotor skill learning in nursing education has rarely been investigated. Of the few nursing studies that have been done, the results were inconclusive. The purpose of this study was to test the effectiveness of visualization as a strategy to teach second year undergraduate baccalaureate nursing students how to administer a medication by intramuscular (I.M.) injection. The use of visualization with video demonstration and physical practice was compared to using only video demonstration and physical practice to teach this group of students I.M. injection administration. Stallings'(1982) Information Processing Model was used to conceptualize visualization in relation to psychomotor skill learning. An experimental, post test only design was used to test the effectiveness of using visualization as a teaching strategy. Data were gathered from a convenience sample of 37 nursing students learning to administer I.M. injections for the first time. Two instruments were used in the data collection procedure. First, prior to learning I.M. injection administration in a scheduled laboratory, students were rated on their ability to produce mental images using The Betts' Questionnaire Upon Mental Imagery (QMI) Vividness of Imagery Scale (Sheehan, 1967). The scores from this test were used to rate participants as having either a high or low imaging ability. High and low imagers were equally divided between the treatment and control groups. At the end of the injections laboratory, all study participants had one of their I.M. injections video-taped. Upon completion of the injections laboratory sessions, the investigator viewed the video tapes and rated each participant's performance using The I.M. Injection Performance Appraisal (Klimek, 1994). The data were analyzed by using the univariate factorial (2X2) analysis of variance (ANOVA). Analysis of the data revealed no significant effect of the visualization treatment on participants' performance scores. However, several methodological and conceptual problems within the study's design and in the utilization of Stallings' conceptual framework could be responsible for the lack of significant findings. The implications of the findings for nursing education, practice, and administration were discussed.
The Separation and H-alpha Contrasts of Massive Accreting Planets in the Gaps of Transitional Disks: Predicted H-alpha Protoplanet Yields for Adaptive Optics Surveys
Creators: name: Close, Laird M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a massive accreting gap (MAG) planet model that ensures large gaps in transitional disks are kept dust free by the scattering action of three co-planar quasi-circular planets in a 1:2:4 Mean Motion Resonance (MMR). This model uses the constraint of the observed gap size, and the dust-free nature of the gap, to determine within ~10% the possible orbits for 3 massive planets in an MMR. Calculated orbits are consistent with the observed orbits and H-alpha emission (the brightest line to observe these planets) for LkCa 15 b and PDS 70 b and PDS 70 c within observational errors. Moreover, the model suggests that the scarcity of detected H-alpha planets is likely a selection effect of the current limitations of non-coronagraphic, low (<10%) Strehl, H-alpha imaging with Adaptive Optics (AO) systems used in past H-alpha surveys. We predict that as higher Strehl AO systems (with high-performance custom coronagraphs; like 6.5-m Magellan Telescope MagAO-X system) are utilized at H-alpha the number of detected gap planets will substantially increase by more than tenfold. For example, we show that >25 new H-alpha "gap planets" are potentially discoverable by a survey of the best 19 transitional disks with MagAO-X. Detections of these accreting protoplanets will significantly improve our understanding of planet formation, planet growth and accretion, solar system architectures, and planet disk interactions.
description: 36 pages, 8 Figures, Accepted by the Astronomical Journal
Ramsey interferometry with ultracold atoms
Creators: name: Seidel, D.
name: Muga, J. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the passage of ultracold two-level atoms through two separated laser fields for the nonresonant case. We show that implications of the atomic quantized motion change dramatically the behavior of the interference fringes compared to the semiclassical description of this optical Ramsey interferometer. Using two-channel recurrence relations we are able to express the double-laser scattering amplitudes by means of the single-laser ones and to give explicit analytical results. When considering slower and slower atoms, the transmission probability of the system changes considerably from an interference behavior to a regime where scattering resonances prevail. This may be understood in terms of different families of trajectories that dominate the overall transmission probability in the weak field or in the strong field limit.
description: 5 figures, 4 pages
Analytically solvable model to the spin Hall effect with Rashba and Dresselhaus spin-orbit couplings
Creators: name: Zhang, Rui
name: Biao, Yuan-Chuan
name: You, Wen-Long
name: Wang, Xiao-Guang
name: Zhang, Yu-Yu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: When the Rashba and Dresslhaus spin-orbit coupling are both presented for a two-dimensional electron in a perpendicular magnetic field, a striking resemblance to anisotropic quantum Rabi model in quantum optics is found. We perform a generalized Rashba coupling approximation to obtain a solvable Hamiltonian by keeping the nearest-mixing terms of Laudau states, which is reformulated in the similar form to that with only Rashba coupling. Each Landau state becomes a new displaced-Fock state with a displacement shift instead of the original Harmonic oscillator Fock state, yielding eigenstates in closed form. Analytical energies are consistent with numerical ones in a wide range of coupling strength even for a strong Zeeman splitting. In the presence of an electric field, the spin conductance and the charge conductance obtained analytically are in good agreements with the numerical results. As the component of the Dresselhaus coupling increases, we find that the spin Hall conductance exhibits a pronounced resonant peak at a larger value of the inverse of the magnetic field. Meanwhile, the charge conductance exhibits a series of plateaus as well as a jump at the resonant magnetic field. Our method provides an easy-to-implement analytical treatment to two-dimensional electron gas systems with both types of spin-orbit couplings.
description: 9 pages,3 figures
Commutative families in DIM algebra, integrable many-body systems and $q,t$ matrix models
Creators: name: Mironov, A.
name: Morozov, A.
name: Popolitov, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We extend our consideration of commutative subalgebras (rays) in different representations of the $W_{1+\infty}$ algebra to the elliptic Hall algebra (or, equivalently, to the Ding-Iohara-Miki (DIM) algebra $U_{q,t}(\widehat{\widehat{\mathfrak{gl}}}_1)$). Its advantage is that it possesses the Miki automorphism, which makes all commutative rays equivalent. Integrable systems associated with these rays become finite-difference and, apart from the trigonometric Ruijsenaars system not too much familiar. We concentrate on the simplest many-body and Fock representations, and derive explicit formulas for all generators of the elliptic Hall algebra $e_{n,m}$. In the one-body representation, they differ just by normalization from $z^nq^{m\hat D}$ of the $W_{1+\infty}$ Lie algebra, and, in the $N$-body case, they are non-trivially generalized to monomials of the Cherednik operators with action restricted to symmetric polynomials. In the Fock representation, the resulting operators are expressed through auxiliary polynomials of $n$ variables, which define weights in the residues formulas. We also discuss $q,t$-deformation of matrix models associated with constructed commutative subalgebras.
description: 51 pages, LaTeX
Developing Enterprise Cyber Situational Awareness
Creators: name: Gorham, Christopher L
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The topic will focus on the U.S. Department of Defense strategy towards improving their network security defenses for the department and the steps they have taken at the agency level where components under DOD such as The Defense Information Systems Agency are working towards adding tools that provides additional capabilities in the cyber space. This approach will be analyzed to determine if DOD goals address any of their vulnerabilities towards protecting their networks. One of the agencies under the DOD umbrella called The Defense Information Systems Agency provides DOD a template on how to build a network that relies upon layers of security to help it combat cyber attacks against its network. Whether that provides an effective solution to DOD remains a question due to the many components that operate under its direction. Managing these networks is the principle responsibilities for the Department of Defense. Nevertheless, it does demonstrates that there are tools available to help DOD build an strong enterprise cyber network of situational awareness that strengthens the ability to protect their network infrastructure.
Electric dipole moments of three-nucleon systems in the pionless effective field theory
Creators: name: Yang, Zichao
name: Mereghetti, Emanuele
name: Platter, Lucas
name: Schindler, Matthias R.
name: Vanasse, Jared
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the electric dipole moments (EDMs) of three-nucleon systems at leading order in pionless effective field theory. The one-body contributions that arise from permanent proton and neutron EDMs and the two-body contributions that arise from CP-odd nucleon-nucleon interactions are taken into account. Neglecting the Coulomb interaction, we consider the triton and ${}^3$He, and also investigate them in the Wigner-SU(4) symmetric limit. We also calculate the electric dipole form factor and find numerically that the momentum dependence of the electric dipole form factor in the Wigner limit is, up to an overall constant (and numerical accuracy), the same as the momentum dependence of the charge form factor.
The Dark Side of mSUGRA
Creators: name: Allanach, B C
name: Lester, C G
name: Weber, A M
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the mu<0 branch of the minimal supergravity ansatz of the minimal supersymmetric standard model. The extent to which mu<0 is disfavoured compared to mu>0 in global fits is calculated with Markov Chain Monte Carlo methods and bridge sampling. The fits include state-of-the-art two-loop MSSM contributions to the electroweak observables M_W and sin^2 theta_w^l, as well as the anomalous magnetic moment of the muon (g-2)_mu, the relic density of dark matter and other relevant indirect observables. mu<0 is only marginally disfavoured in global fits and should be considered in mSUGRA analyses. We estimate that the ratio of probabilities is P(mu<0) / P(mu>0)=0.07-0.16.
description: 31 pages, 18 figures, revised version constitutes a re-ordering of sections and minor re-wording. Extra figure added: mass spectrum in no-WMAP fits
Additional file 1 of Prediction of total hospital expenses of patients undergoing breast cancer surgery in Shanghai, China by comparing three models
Creators: name: Chen, Minjie
name: Wu, Xiaopin
name: Zhang, Jidong
name: Dong, Enhong
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology
subject: Cancer
subject: Science Policy
subject: Plant Biology

description: Additional file 1.
Quantum Metrology with Coherent Superposition of Two Different Coded Channels
Creators: name: Xie, Dong
name: Xu, Chunling
name: Wang, An Min
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the advantage of coherent superposition of two different coded channels in quantum metrology. In a continuous variable system, we show that the Heisenberg limit $1/N$ can be beaten by the coherent superposition without the help of indefinite causal order. And in parameter estimation, we demonstrate that the strategy with the coherent superposition can perform better than the strategy with quantum \textsc{switch} which can generate indefinite causal order. We analytically obtain the general form of estimation precision in terms of the quantum Fisher information and further prove that the nonlinear Hamiltonian can improve the estimation precision and make the measurement uncertainty scale as $1/N^m$ for $m\geq2$. Our results can help to construct a high-precision measurement equipment, which can be applied to the detection of coupling strength and the test of time dilation and the modification of the canonical commutation relation.
description: 6pages,2figures
Challenges and Prospects of Investigative Journalism in the South Caucasus
Creators: name: Ulviyya, Karimli
Publisher: name: Zenodo
Year: 2023

description: Abstract:

This research paper delves into the challenges faced by investigative journalists in the South Caucasus, focusing on Armenia, Azerbaijan, and Georgia. In an era marked by increasing threats to press freedom, this study seeks to understand the impact of restricted access to information, the role of existing laws in supporting independent media, and the challenges posed by digital transformation. Qualitative research methods, including in-depth interviews with investigative journalists and media experts, serve as the primary means of data collection. The study aims to shed light on the current state of investigative journalism in the region and provide recommendations for its advancement.
Tidal Barrier and the Asymptotic Mass of Proto Gas-Giant Planets
Creators: name: Dobbs-Dixon, Ian
name: Li, Shu Lin
name: Lin, D. N. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Extrasolar planets found with radial velocity surveys have masses ranging from several Earth to several Jupiter masses. While mass accretion onto protoplanetary cores in weak-line T-Tauri disks may eventually be quenched by a global depletion of gas, such a mechanism is unlikely to have stalled the growth of some known planetary systems which contain relatively low-mass and close-in planets along with more massive and longer period companions. Here, we suggest a potential solution for this conundrum. In general, supersonic infall of surrounding gas onto a protoplanet is only possible interior to both of its Bondi and Roche radii. At a critical mass, a protoplanet's Bondi and Roche radii are equal to the disk thickness. Above this mass, the protoplanets' tidal perturbation induces the formation of a gap. Although the disk gas may continue to diffuse into the gap, the azimuthal flux across the protoplanets' Roche lobe is quenched. Using two different schemes, we present the results of numerical simulations and analysis to show that the accretion rate increases rapidly with the ratio of the protoplanet's Roche to Bondi radii or equivalently to the disk thickness. In regions with low geometric aspect ratios, gas accretion is quenched with relatively low protoplanetary masses. This effect is important for determining the gas-giant planets' mass function, the distribution of their masses within multiple planet systems around solar type stars, and for suppressing the emergence of gas-giants around low mass stars.
Galactic Rotation Curves of LSB Galaxies using core-halo FDM configurations
Creators: name: Alvarez-Rios, Ivan
name: Bernal, Tula
name: Chavanis, Pierre-Henri
name: Guzman, Francisco S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we construct galactic halos in order to fit the rotation curves (RCs) of a sample of low surface brightness (LSB) galaxies. These halos are made of Fuzzy Dark Matter (FDM) with a multimode expansion of non-spherical modes that in average contribute to the appropriate density profile consisting of a core and an envelope needed to fit the rotation curves. The coefficients of the expansion are calculated using a genetic algorithm, that minimizes the difference between the spatial average density of the multimode order parameter describing the FDM and the target dark matter density that fits the RCs. The FDM halos are constructed assuming a solitonic core at the center and two types of envelopes, Navarro-Frenk-White and Pseudo-Isothermal density profiles. The resulting FDM configurations are then evolved in order to show how the average density changes in time due to the secular dynamical evolution, along with a condensation process that lead to the growth of the solitonic core.
description: 12 pages, 5 figures. Accepted - Phys. Rev. D
Spectral properties of X-ray bright variable sources in the Taurus Molecular Cloud
Creators: name: Franciosini, E.
name: Pillitteri, I.
name: Stelzer, B.
name: Micela, G.
name: Briggs, K. R.
name: Scelsi, L.
name: Telleschi, A.
name: Audard, M.
name: Palla, F.
name: Guedel, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze 19 bright variable X-ray sources detected in the XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST), in order to characterize the variations with time of their coronal properties and to derive informations on the X-ray emitting structures. We performed time-resolved spectroscopy of the EPIC PN and MOS spectra of the XEST sources, using a model with one or two thermal components, and we used the time evolution of the temperatures and emission measures during the decay phase of flares to derive the size of the flaring loops. The light curves of the selected sources show different types of variability: flares, long-lasting decay or rise through the whole observation, slow modulation or complex flare-like variability. Spectral analysis shows typical quiescent plasma temperatures of 5-10 MK and 15-35 MK; the cool component generally remains constant, while the observed flux changes are due to variations of the hot component. During flares the plasma reaches temperatures up to 100 MK and luminosities up to $\sim 10^{31}$ erg s$^{-1}$. Loop sizes inferred from flare analysis are generally smaller than or comparable to the stellar radius.
description: 18 pages, 11 figures, 3 tables. Accepted by A&A, to appear in a special section/issue dedicated to the XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST)
Cálculo de la integral escalar a un lazo $A(m^2)$ mediante el teorema del residuo
Creators: name: García-Aguilar, J. D.
name: Gómez-Izquierdo, J. C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Radiative corrections in the phenomenology of particle physics lead to great predictions on the observables of the Standard Model (SM) which are in good agreement with different measurements on Particle Accelerators and Detectors and in the case of numeric predictions on Quantum Chromodynamics (QCD) and its study in the lattice for the low energy regime. This is a pedagogical paper in which we calculate the one loop scalar integral $A(m^2)$, that arises in the simplest radiative correction calculation, by means of the dimensional regularization. As main result, we perform also the evaluation of this integral by using the Residue Theorem on complex variable. In addition, the equivalence between the two procedures is shown through Gamma function properties.
description: in Spanish
การฟื้นฟู สืบสานและสร้างมูลค่าเพิ่มแก่ทุนวัฒนธรรมอาหารไท-ยวน เพื่อเสริมสร้างสุขภาวะและเศรษฐกิจชุมชนเชิงสร้างสรรค์ อำเภอสีคิ้ว จังหวัดนครราชสีมา
Creators: name: ธนิดา ผาติเสนะ
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: การฟื้นฟูและสืบสาน, การสร้างมูลค่าเพิ่ม, ทุนวัฒนธรรมอาหารไท-ยวน, เศรษฐกิจชุมชนเชิงสร้างสรรค์ (Restoration and inheritance, Value-added, Culture of Thai-Yuan food, Creative community economics)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 15-26
การศึกษาแนวทางการส่งเสริมการจัดการเรียนรู้รายวิชาการจัดบริการแนะแนวในโรงเรียน สำหรับนักศึกษาสาขาวิชาจิตวิทยาการปรึกษาและการแนะแนว คณะครุศาสตร์ มหาวิทยาลัยราชภัฏนครราชสีมา
Creators: name: กนกกร เมตตาจิต
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: การจัดบริการแนะแนวในโรงเรียน, การส่งเสริม, การเรียนรู้ (Management in school guidance sevices, Guidelines to develop, Learning)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 27-38
มาตรการทางกฎหมายในการให้ความคุ้มครองการทำนิติกรรมของบุคคลวิกลจริต
Creators: name: ศิริเพ็ญ จันทร์นิยม
Publisher: name: หจก.เลิศศิลป์ สาส์ณ โฮลดิ้ง
Year: 2562
Subjects: มาตรการทางกฎหมาย, การให้ความคุ้มครอง, การทำนิติกรรมของบุคคลวิกลจริต (Legal measures, Protection, Legal acts of insane persons)

description: วารสารชุมชนวิจัย มหาวิทยาลัยราชภัฏนครราชสีมา, 13, 2, 39-52
Orbital entanglement and correlation from pCCD-tailored Coupled Cluster wave functions
Creators: name: Nowak, Artur
name: Legeza, Ors
name: Boguslawski, Katharina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Wave functions based on electron-pair states provide inexpensive and reliable models to describe quantum many-body problems containing strongly-correlated electrons, given that broken-pair states have been appropriately accounted for by, for instance, a posteriori corrections. In this article, we analyse the performance of electron-pair methods in predicting orbital-based correlation spectra. We focus on the (orbital-optimized) pair-coupled cluster Doubles (pCCD) ansatz with a linearized coupled-cluster (LCC) correction. Specifically, we scrutinize how orbital-based entanglement and correlation measures can be determined from a pCCD-tailored CC wave function. Furthermore, we employ the single-orbital entropy, the orbital-pair mutual information, and the eigenvalue spectra of the two-orbital reduced density matrices to benchmark the performance of the LCC correction for the one-dimensional Hubbard model with periodic boundary condition as well as the N$_2$ and F$_2$ molecules against DMRG reference calculations. Our study indicates that pCCD-LCC accurately reproduces the orbital-pair correlation patterns in the weak-correlation limit and for molecules close to their equilibrium structure. Hence, we can conclude that pCCD-LCC predicts reliable wave functions in this regime. In the strong-correlation limit and for molecules with stretched bonds, the LCC correction, generally, overestimates orbital-pair correlations.
description: 4 figures