cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Assessment and Status of the US Gulf of Maine-Georges Bank Acadian Redfish stock
Creators: name: Miller, Timothy J.
name: Cadrin, Steven X.
Publisher: name: ASC 2011 - Theme session A
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.From the 1930s through the 1970s, Acadian redfish supported a substantial domestic commercial fishery in the Gulf of Maine and on Georges Bank. Since the stock’s collapse in the 1980s, there has been little targeted fishing effort. In 2001, the stock was determined to be overfished with a rebuilding plan begun in 2004 as part of Amendment 13 to the Multispecies Fisheries Management Plan. The last assessment of Acadian redfish in 2008 determined that the stock was still overfished although it was projected to be rebuilt with high probability in 2011 with current levels of fishing. Recovery was projected to occur more quickly than expected owing to healthy recruitment and lack of any significant fishing pressure for a protracted period of time. Preliminary results from the same model used in the most recent assessment, but updated with survey indices and catches through 2009, suggest that the stock has been recovering as predicted by the 2008 assessment.
On two assimilation processes in Greek and English
Creators: name: Efstathiadis, Stathis
Publisher: name: Selected papers on theoretical and applied linguistics
Year: 1987

description: (no abstract available)
description: Selected papers on theoretical and applied linguistics, Vol 1 (1987): Proceedings of the First Symposium on English and Modern Greek: Description and/or Comparison of the Two Languages, Thessaloniki 1-3 April 1987
Statistics of Gravitational Microlensing Magnification. I. Two-Dimensional Lens Distribution
Creators: name: Kofman, Lev
name: Kaiser, Nick
name: Lee, Man Hoi
name: Babul, Arif
Publisher: name: arXiv
Year: 1996
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: (Abridged) In this paper we refine the theory of microlensing for a planar distribution of point masses. We derive the macroimage magnification distribution P(A) at high magnification (A-1 >> tau^2) for a low optical depth (tau << 1) lens distribution by modeling the illumination pattern as a superposition of the patterns due to individual ``point mass plus weak shear'' lenses. We show that a point mass plus weak shear lens produces an astroid- shaped caustic and that the magnification cross-section obeys a simple scaling property. By convolving this cross-section with the shear distribution, we obtain a caustic-induced feature in P(A) which also exhibits a simple scaling property. This feature results in a 20% enhancement in P(A) at A approx 2/tau. In the low magnification (A-1 << 1) limit, the macroimage consists of a bright primary image and a large number of faint secondary images formed close to each of the point masses. Taking into account the correlations between the primary and secondary images, we derive P(A) for low A. The low-A distribution has a peak of amplitude ~ 1/tau^2 at A-1 ~ tau^2 and matches smoothly to the high-A distribution. We combine the high- and low-A results and obtain a practical semi-analytic expression for P(A). This semi-analytic distribution is in qualitative agreement with previous numerical results, but the latter show stronger caustic-induced features at moderate A for tau as small as 0.1. We resolve this discrepancy by re-examining the criterion for low optical depth. A simple argument shows that the fraction of caustics of individual lenses that merge with those of their neighbors is approx 1-exp(-8 tau). For tau=0.1, the fraction is surprisingly high: approx 55%. For the purpose of computing P(A) in the manner we did, low optical depth corresponds to tau << 1/8.
description: 35 pages, including 6 figures; uses AASTeX v4.0 macros; submitted to ApJ
Additional file of Detecting copy number status and uncovering subclonal markers in heterogeneous tumor biopsies
Creators: name: Parisi, Fabio
name: Ariyan, Stephan
name: Narayan, Deepak
name: Bacchiocchi, Antonella
name: Hoyt, Kathleen
name: Cheng, Elaine
name: Xu, Fang
name: Li, Peining
name: Halaban, Ruth
name: Kluger, Yuval
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file of Detecting copy number status and uncovering subclonal markers in heterogeneous tumor biopsies
Inflections and Syntactic Groups: A Comparative Study in English and Greek
Creators: name: Mela-Athanasopoulou, Elizabeth
Publisher: name: Selected papers on theoretical and applied linguistics
Year: 1987

description: (no abstract available)
description: Selected papers on theoretical and applied linguistics, Vol 1 (1987): Proceedings of the First Symposium on English and Modern Greek: Description and/or Comparison of the Two Languages, Thessaloniki 1-3 April 1987
title: Multidecadal growth‐increment chronologies for North Pacific and North Atlantic rockfish species
Creators: name: Black, Bryan A.
name: Schroeder, Isaac D.
name: Sydeman, William J.
name: Bograd, Steven J.
Publisher: name: ASC 2011 - Theme session A
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author.Tree‐ring (dendrochronology) techniques have been increasingly applied to develop environmentally sensitive growth chronologies from annual otolith increment widths of various rockfish (Sebastes) species. Final chronologies are multidecadal, exactly dated, and can be used to (i) describe long‐term growth histories, (ii) determine the effects of climate on growth, and (iii) integrate with other biological time‐series to quantify relationships across diverse taxa and ecosystems. In the California Current of the Northeast Pacific, splitnose and yelloweye rockfish chronologies span as many as 71 years and strongly relate to each other as well as other biological indicators, including records of seabird reproductive success. Synchrony across these diverse timeseries is driven by their shared sensitivities to winter ocean conditions, and years with favourable climate (strong February and March upwelling) are characterized by robust rockfish growth, early seabird lay dates, and high fledgling success. These results provide long‐term, corroborating evidence as to the importance of winter ocean conditions for ecosystem productivity. Similar approaches are also possible for Atlantic rockfish species. A 30‐year Acadian redfish (S. fasciatus) chronology has recently been developed for the Gulf of Maine, which significantly (p < 0.01) correlates to climate indices, especially the Atlantic Multi‐decadal Oscillation. These correlations indicate that cool conditions are associated with strong growth, consistent with species in the Pacific. Overall, chronology development could be more widely applied in the North Atlantic to better understand long‐term rockfish growth patterns, their relationships to climate, and interactions with other biological components of the ecosystem.
The Little Dippers: Transits of Star-grazing Exocomets?
Creators: name: Ansdell, Megan
name: Gaidos, Eric
name: Jacobs, Tom L.
name: Mann, Andrew W.
name: Manara, Carlo F.
name: Kennedy, Grant M.
name: Vanderburg, Andrew M.
name: Kenworthy, Matthew
name: Hirano, Teruyuki
name: LaCourse, Daryll M.
name: Hedges, Christina
name: Frasca, Antonio
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We describe EPIC 205718330 and EPIC 235240266, two systems identified in the K2 data whose light curves contain episodic drops in brightness with shapes and durations similar to those of the young "dipper" stars, yet shallower by ~1-2 orders of magnitude. These "little dippers" have diverse profile shapes with durations of ~0.5-1.0 days and depths of ~0.1-1.0% in flux; however, unlike most of the young dipper stars, these do not exhibit any detectable infrared excess indicative of protoplanetary disks, and our ground-based follow-up spectra lack any signatures of youth while indicating these objects as kinematically old. After ruling out instrumental and/or data processing artifacts as sources of the dimming events, we investigate possible astrophysical mechanisms based on the light curve and stellar properties. We argue that the little dippers are consistent with transits of star-grazing exocomets, and speculate that they are signposts of massive non-transiting exoplanets driving the close-approach orbits.
description: 14 pages, 9 Figures; accepted to MNRAS
Importance of ITKs in cost-effective livestock health management: An opportunities and challenges
Creators: name: Neethu J S1, Prarthana R2, Manjula N3 Mohammed Umer M4, and Anil Kumar G K5
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: Indigenous technical knowledge refers to the traditional, local, and often informal knowledge systems developed by indigenous communities over generations to address their specific needs and challenges, encompassing practices, skills, techniques, and innovations related to agriculture, medicine, ecology, architecture, and more. It helps people use their reasoning and creative thinking to solve the majority of their problems, also known as Farmers Wisdom or Farmers Knowledge, Indigenous Knowledge System (IKS), Local Knowledge (LK), Traditional Knowledge (TK), and Indigenous Technical Knowledge. This is a functional knowledge system that is centred on communities and has been developed, maintained, and improved over generations through interactions, observations, and experiments with the environment. In rural areas, especially in farming communities, ITK plays a big role in people’s lives. The farming community continues to have a strong belief in its traditional knowledge despite advancements in technology. This knowledge is primarily communicated orally among members of specific cultures and is expressed through myths, stories, songs, rituals, beliefs, etc.
SUSY Signals from QCD Production at the Upgraded LHC
Creators: name: Han, Tao
name: Ismail, Ahmed
name: Haghi, Barmak Shams Es
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Weak-scale supersymmetry remains to be one of the best-motivated theories of physics beyond the Standard Model. We evaluate the sensitivities of the High Luminosity (HL) and High Energy (HE) upgrades of the LHC to gluinos and stops, decaying through the simplified topologies $\tilde{g} \to q \bar{q} χ^0$, $\tilde{g} \to t \bar{t} χ^0$ and $\tilde{t} \to t \tildeχ^0$. Our HL-LHC analyses improve on existing experimental projections by optimizing the acceptance of kinematic variables. The HE-LHC studies represent the first 27 TeV analyses. We find that the HL-(HE-)LHC with 3 ab$^{-1}$ (15 ab$^{-1}$) of integrated luminosity will be sensitive to the masses of gluinos and stops at 3.2 (5.7) TeV and 1.5 (2.7) TeV, respectively, decaying to massless neutralinos.
description: 17 pages, 4 figures, 2 tables. v2: typos corrected, minor changes, conclusions unaffected, version published in PLB
Fluctuations, response and aging dynamics in a simple glass-forming liquid out of equilibrium
Creators: name: Kob, Walter
name: Barrat, Jean-Louis
Publisher: name: arXiv
Year: 1999
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By means of molecular dynamics computer simulations we investigate the out of equilibrium relaxation dynamics of a simple glass former, a binary Lennard-Jones system, after a quench to low temperatures. We study both one time quantities and two-times correlation functions. Two-times correlation functions show a strong time and waiting time $t_w$ dependence. For large $t_w$ and times corresponding to the early $β$-relaxation regime the correlators approach the Edwards-Anderson value by means of a power-law in time. at long times $τ$ the correlation functions can be expressed as $C_{\rm AG}(h(t_w+τ)/h(t_w))$ and compute the function $h(t)$. This function is found to show a $t$-dependence which is a bit stronger than a logarithm and to depend on the observable considered. Finally we discuss our measurements of the time dependent response function. We find that at long times the correlation functions and the response are not related by the usual fluctuation dissipation theorem but that this relation is similar to the one found for spin glasses with one step replica symmetry breaking.
description: 23 pages, 14 figures
Additional file 2: of Patient perspectives on use of electronic health records for research recruitment
Creators: name: Beskow, Laura
name: Brelsford, Kathleen
name: Hammack, Catherine
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Table S2–1. Questionnaire responses – trust, attitudes toward research. Table S2–2. Additional illustrative quotes. Figure S2. Summary – acceptable and most appropriate recruitment approaches. (PDF 187 kb)
Type-II superconductivity in W5Si3-type Nb5Sn2Al
Creators: name: Wu, Jifeng
name: Liu, Bin
name: Cui, Yanwei
name: Wang, Hangdong
name: Wang, Zhicheng
name: Ren, Zhi
name: Cao, Guanghan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the discovery of superconductivity in the ternary aluminide Nb$_{5}$Sn$_{2}$Al, which crystallizes in the W$_{5}$Si$_{3}$-type structure with one-dimensional Nb chains along the $c$-axis. It is found that the compound has a multiband nature and becomes a weakly coupled, type-II superconductor below 2.0 K. The bulk nature of superconductivity is confirmed by the specific heat jump, whose temperature dependence shows apparent deviation from a single isotropic gap behavior. The lower and upper critical fields are estimated to be 2.0 mT and 0.3 T, respectively. From these values, we derive the penetration depth, coherence length and Ginzburg-Landau parameter to be 516 nm, 32.8 nm and 15.6, respectively. By contrast, the isostructural compound Ti$_{5}$Sn$_{2}$Al dose not superconduct above 0.5 K. A comparison of these results with other W$_{5}$Si$_{3}$-type superconductors suggests that $T_{\rm c}$ of these compounds correlates with the average number of valence electrons per atom.
description: Accepted for publication in Supercond. Sci. Technol
Aspects Of Heavy Quark Theory
Creators: name: Bigi, I.
name: Shifman, M.
name: Uraltsev, N.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent achievements in the heavy quark theory are critically reviewed. The emphasis is put on those aspects which either did not attract enough attention or cause heated debates in the current literature. Among other topics we discuss (i) basic parameters of the heavy quark theory; (ii) a class of exact QCD inequalities; (iii) new heavy quark sum rules; (iv) virial theorem; (v) applications (|V_cb| from the total semileptonic width and from the B->D* transition at zero recoil). In some instances new derivations of the previously known results are given, or new aspects addressed. In particular, we dwell on the exact QCD inequalities. Furthermore, a toy model is considered that may shed light on the controversy regarding the value of the kinetic energy of heavy quarks obtained by different methods.
description: 67 pages, 6 Figures; plain LaTeX. Changes: Some equations in Sect.4 related to spin-nonsinglet sum rules are corrected. The references are updated.
Additional file 1: of Applicability of the WHO maternal near miss tool in sub-Saharan Africa: a systematic review
Creators: name: Abera Tura
name: Trang, To
name: Akker, Thomas
name: Roosmalen, Jos
name: Scherjon, Sicco
name: Zwart, Joost
name: Stekelenburg, Jelle
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Search strategy. The list of data bases searched and keywords used for searching. (DOC 62 kb)
Fluctuations in confined nematic liquid crystals in a regime of critical wetting
Creators: name: Ivanov, N. B.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Within the macroscopic Landau-de Gennes approach, we examine the Gaussian normal mode fluctuations of semi-infinite nematic liquid crystals in a regime of critical wetting. It is argued that surface free-energy potentials that strongly suppress the long-range nematic order favor the appearance of bound biaxial nematic-director fluctuation modes, located in the domain occupied by the thermodynamic phase wetting the wall. Instead, substrates enhancing the orientational order promote the existence of uniaxial nematic-director local excitations. Close to the phase coexistence temperature both types of local exciations are strongly softened as compared to their bulk counterparts and acquire characteristic cusplike low-energy spectra. These spectrum peculiarities are directly connected to the critical behavior of the mean-field interface position and can provide a valuable insight on the nature of surface interactions and critical wetting phenomena in nematic liquid crystals. Possible changes in the local director mode properties resulting from the critical interface position fluctuations and order electricity effects are also discussed.
description: 13 pages, RevTex, 3 eps figures. Phys. Rev. E, submitted
Statistics of Gravitational Microlensing Magnification. II. Three-Dimensional Lens Distribution
Creators: name: Lee, Man Hoi
name: Babul, Arif
name: Kofman, Lev
name: Kaiser, Nick
Publisher: name: arXiv
Year: 1996
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In Paper I we studied the theory of gravitational microlensing for a planar distribution of point masses. In this second paper, we extend the analysis to a three-dimensional lens distribution. First we study the lensing properties of three-dimensional lens distributions by considering in detail the critical curves, the caustics, the illumination patterns, and the magnification cross-sections sigma(A) of multiplane configurations with two, three, and four point masses. For N_\ast point masses that are widely separated in Lagrangian space, we find that there are ~ 2^{N_\ast} - 1 critical curves in total, but that only ~ N_\ast of these produce prominent caustic-induced features at the high magnification end of sigma(A). In the case of a low optical depth random distribution of point masses, we show that the multiplane lens equation near a point mass can be reduced to the single plane equation of a point mass perturbed by weak shear. This allows us to calculate the caustic-induced feature in the macroimage magnification distribution P(A) as a weighted sum of the semi-analytic feature derived in Paper I for a planar lens distribution. The resulting semi-analytic caustic-induced feature is similar to the feature in the planar case, but it does not have any simple scaling properties, and it is shifted to higher magnification. The semi-analytic distribution is compared to the results of previous numerical simulations for optical depth tau ~ 0.1, and they are in better agreement than a similar comparison in the planar case. We explain this by estimating the fraction of caustics of individual lenses that merge with those of their neighbors. For tau=0.1, the fraction is approx 20%, much less than the approx 55% for the planar case.
description: 52 pages, including 15 figures (Figures 3, 6, and 10 have been bitmapped); uses AASTeX v4.0 macros; submitted to ApJ
Knowledge is power: a critique of positivist accounts of the foundation of public libraries from the cultural studies perspective
Creators: name: Casselden, Lindsay
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Knowledge is power: a critique of positivist accounts of the foundation of public libraries from the cultural studies perspective
H$_2$/HD molecular data for analysis of quasar spectra in search of varying constants
Creators: name: Ubachs, W.
name: Salumbides, E. J.
name: Murphy, M. T.
name: Abgrall, H.
name: Roueff, E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Absorption lines of H$_2$ and HD molecules observed at high redshift in the line of sight towards quasars are a test ground to search for variation of the proton-to-electron mass ratio $μ$. For this purpose, results from astronomical observations are compared with a compilation of molecular data of the highest accuracy, obtained in laboratory studies as well as in first-principles calculations. Aims: A comprehensive line list is compiled for H$_2$ and HD absorption lines in the Lyman ($B^1Σ_u^+$ - $X^1Σ_g^+$) and Werner ($C^1Π_u$ - $X^1Σ_g^+$) band systems up to the Lyman cutoff at 912 Angstroms. Molecular parameters listed for each line $i$ are the transition wavelength $λ_i$, the line oscillator strength $f_i$, the radiative damping parameter of the excited state $Γ_i$, and the sensitivity coefficient $K_i$ for a variation of the proton-to-electron mass ratio. Methods: The transition wavelengths $λ_i$ for the H$_2$ and HD molecules are determined by a variety of advanced high-precision spectroscopic experiments involving narrowband vacuum ultraviolet lasers, Fourier-transform spectrometers, and synchrotron radiation sources. Results for the line oscillator strengths $f_i$, damping parameters $Γ_i$, and sensitivity coefficients $K_i$ are obtained in theoretical quantum chemical calculations. Results: A new list of molecular data is compiled for future analyses of cold clouds of hydrogen absorbers, specifically for studies of $μ$-variation from quasar data. The list is applied in a refit of quasar absorption spectra of B0642$-$5038 and J1237$+$0647 yielding constraints on a variation of the proton-to-electron mass ratio $Δμ/μ$ consistent with previous analyses.
description: 4 pages. Accepted by Astronomy and Astrophysics. The 3 tables containing the molecular data are available at http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/622/A127 and are contained in the source package of the arXiv submission (in "Other formats")
Vibration-induced "thermally activated" jamming transition in granular media
Creators: name: D'Anna, G.
name: Gremaud, G.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The quasi-static frequency response of a granular medium is measured by a forced torsion oscillator method, with forcing frequency $f_{p}$ in the range $10^{-4}$ Hz to 5 Hz, while weak vibrations at high-frequency $f_{s}$, in the range 50 Hz to 200 Hz, are generated by an external shaker. The intensity of vibration, $Γ$, is below the fluidization limit. A loss factor peak is observed in the oscillator response as a function of $Γ$ or $f_{p}$. In a plot of $\ln f_{p}$ against $1/Γ$, the position of the peak follows an Arrhenius-like behaviour over four orders of magnitude in $f_{p}$. The data can be described as a stochastic hopping process involving a probability factor $\exp(-Γ_{j}/Γ)$ with $Γ_{j}$ a $f_{s}$-dependent characteristic vibration intensity. A $f_{s}$-independent description is given by $\exp(-τ_{j}/τ)$, with $τ_{j}$ an intrinsic characteristic time, and $τ=Γ^{n}/2πf_{s}$, n=0.5-0.6, an empirical control parameter with unit of time. $τ$ is seen as the effective average time during which the perturbed grains can undergo structural rearrangement. The loss factor peak appears as a crossover in the dynamic behaviour of the vibrated granular system, which, at the time-scale $ 1/f_{p}$, is solid-like at low $Γ$, and the oscillator is jammed into the granular material, and is fluid-like at high $Γ$, where the oscillator can slide viscously.
description: Final version to appear in PRE
Superconducting quantum refrigerator: Breaking and rejoining Cooper pairs with magnetic field cycles
Creators: name: Manikandan, Sreenath K.
name: Giazotto, Francesco
name: Jordan, Andrew N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a solid state refrigeration technique based on repeated adiabatic magnetization/demagnetization cycles of a superconductor which acts as the working substance. The gradual cooling down of a substrate (normal metal) in contact with the working substance is demonstrated for different initial temperatures of the substrate. Excess heat is given to a hot large-gap superconductor. The on-chip refrigerator works in a cyclic manner because of an effective thermal switching mechanism: Heat transport between N/N versus N/S junctions is asymmetric because of the appearance of the energy gap. This switch permits selective cooling of the metal. We find that this refrigeration technique can cool down a 0.3cm$^{3}$ block of Cu by almost two orders of magnitude starting from 200mK, and down to about 1mK starting from the base temperature of a dilution fridge (10mK). The corresponding cooling power for a 1cm$\times$1cm interface are 25 nW and 0.06 nW respectively, which scales with the area of the interface.
description: 8 pages, 4 figures
Persistent current in a mesoscopic ring with diffuse surface scattering
Creators: name: Samokhin, K. V.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The persistent current in a clean mesoscopic ring with ballistic electron motion is calculated. The particle dynamics inside a ring is assumed to be chaotic due to scattering at the surface irregularities of atomic size. This allows one to use the so-called ``ballistic'' supersymmetric σmodel for calculation of the two-level correlation function in the presence of a nonzero magnetic flux.
description: REVTeX, 4 pages; to be published in PRB (June 1999)
Two-loop QCD corrections to semileptonic b decays at maximal recoil
Creators: name: Czarnecki, Andrzej
name: Melnikov, Kirill
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a complete $O(α_s^2)$ correction to the differential width of the inclusive semileptonic decay $b\to clν_l$ at the kinematical point of vanishing invariant mass of the leptons, $q^2=0$. Together with the recently computed $O(α_s^2)$ correction at the upper boundary of the lepton invariant mass spectrum, this new information permits an estimate of the $O(α_s^2)$ effect in the total inclusive semileptonic decay width $b\to clν_l$. We argue that the non-BLM part of the $O(α_s^2)$ correction gives at most 1% correction to the inclusive semileptonic decay width $b\to clν_l$. This significantly improves the credibility of extracting $|V_{cb}|$ from the inclusive semileptonic decays of the b-hadrons.
description: 8 pages, revtex
Higher spin fields and the problem of cosmological constant
Creators: name: Dolgov, A. D.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The cosmological evolution of free massless vector or tensor (but not gauge) fields minimally coupled to gravity is analyzed. It is shown that there are some unstable solutions for these fields in De Sitter background. The back reaction of the energy-momentum tensor of such solutions to the original cosmological constant exactly cancels the latter and the expansion regime changes from the exponential to the power law one. In contrast to the adjustment mechanism realized by a scalar field the gravitational coupling constant in this model is time-independent and the resulting cosmology may resemble the realistic one.
description: 15 pages, Latex twice
Classifying Snapshots of the Doped Hubbard Model with Machine Learning
Creators: name: Bohrdt, Annabelle
name: Chiu, Christie S.
name: Ji, Geoffrey
name: Xu, Muqing
name: Greif, Daniel
name: Greiner, Markus
name: Demler, Eugene
name: Grusdt, Fabian
name: Knap, Michael
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum gas microscopes for ultracold atoms can provide high-resolution real-space snapshots of complex many-body systems. We implement machine learning to analyze and classify such snapshots of ultracold atoms. Specifically, we compare the data from an experimental realization of the two-dimensional Fermi-Hubbard model to two theoretical approaches: a doped quantum spin liquid state of resonating valence bond type, and the geometric string theory, describing a state with hidden spin order. This approach considers all available information without a potential bias towards one particular theory by the choice of an observable and can therefore select the theory which is more predictive in general. Up to intermediate doping values, our algorithm tends to classify experimental snapshots as geometric-string-like, as compared to the doped spin liquid. Our results demonstrate the potential for machine learning in processing the wealth of data obtained through quantum gas microscopy for new physical insights.
description: 4 pages, 3 figures + 4 pages, 5 figures
The mechanism of thickness selection in the Sadler-Gilmer model of polymer crystallization
Creators: name: Doye, Jonathan
name: Frenkel, Daan
Publisher: name: arXiv
Year: 1998
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: Recent work on the mechanism of polymer crystallization has led to a proposal for the mechanism of thickness selection which differs from those proposed by the surface nucleation theory of Lauritzen and Hoffman and the entropic barrier model of Sadler and Gilmer. This has motivated us to reexamine the model used by Sadler and Gilmer. We again find a fixed-point attractor which describes the dynamical convergence of the crystal thickness to a value just larger than the minimum stable thickness, l_min. This convergence arises from the combined effect of two constraints on the length of stems in a layer: it is unfavourable for a stem to be shorter than l_min and for a stem to overhang the edge of the previous layer. The relationship between this new mechanism and the explanation given by Sadler and Gilmer in terms of an entropic barrier is discussed. We also examine the behaviour of the Sadler-Gilmer model when an energetic contribution from chain folds is included.
description: 15 pages, 13 figures, revtex
Synthesis, α-amylase and α-glucosidase inhibition and molecular docking studies of indazole derivatives
Creators: name: Nawaz, Muhammad
name: Taha, Muhammad
name: Qureshi, Faiza
name: Ullah, Nisar
name: Selvaraj, Manikandan
name: Shahzad, Sumaira
name: Chigurupati, Sridevi
name: Abubshait, Samar A.
name: Ahmad, Tauqir
name: Chinnam, Sampath
name: Hisaindee, Soleiman
Publisher: name: Taylor & Francis
Year: 2021
Subjects: Biochemistry
Space Science
Medicine
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified

description: Herein, we report the synthesis and inhibitory potential of indazole (Methyl 1H-indazole-4-carboxylate) derivatives (1–13) against α-amylase and α-glucosidase enzymes. The described derivatives demonstrated good inhibitory potential with IC50 values, ranging between 15.04 ± 0.05 to 76.70 ± 0.06 µM ± SEM for α-amylase and 16.99 ± 0.19 to 77.97 ± 0.19 µM ± SEM for α-glucosidase, respectively. In particular, compounds (8–10 and 12) displayed significant inhibitory activities against both the screened enzymes, with their inhibitory potential comparable to the standard acarbose (12.98 ± 0.03 and 12.79 ± 0.17 µM ± SEM, respectively). Additionally, the influence of different substituents on enzyme inhibition activities was assessed to study the structure activity relationships. Molecular docking simulations were performed to rationalize the binding of derivatives/compounds with enzymes. All the synthesized derivatives (1–13) were characterized with the aid of spectroscopic instruments such as 1H-NMR, 13C-NMR, HR-MS, elemental analysis and FTIR. Communicated by Ramaswamy H. Sarma
SIMULADOR DE SENSOPERCEPCIÓN VISUAL, COMO HERRAMIENTA DE APOYO AL PROCESO DE APRENDIZAJE EN EDUCACIÓN A DISTANCIA
Creators: name: Cardona, Marcela
Publisher: name: figshare
Year: 2019
Subjects: subject: 130306 Educational Technology and Computing
subject: FOS: Educational sciences

description: Los simuladores educativos son una importante herramienta pedagógica para que el estudiante ejecute en práctica los conocimientos teóricos adquiridos durante su formación profesional, toda vez que el simulador semeja situaciones reales en las que el estudiante experimenta y contextualiza su conocimiento, teniendo como objetivo aportar en el mejoramiento de la enseñanza y aprendizaje, pues a pesar de la gran variedad de oportunidades que implica el uso de la realidad virtual en labores educativas se ve como hoy en día, no es común contar con este tipo de herramientas dentro del aula, por ello durante este artículo se muestra el desarrollo de un simulador en sensopercepción como apoyo para potencializar el proceso de enseñanza como estrategia pedagógica, para ello se estudiaron todos los riesgos potenciales y se seleccionaron alternativas propuestas para reducir o eliminar los riesgos durante el desarrollo del simulador. La metodología utilizada es el modelo de ingeniería del software espiral , que proporciona el potencial para el desarrollo rápido de versiones incrementales del software ya que se divide en un número de actividades, donde cada una está compuesta por otro grupo de tareas, las cuales se adaptan a las características del proyecto que se desarrolló. El entorno virtual propuesto para el tema de sensopercepción es una herramienta de integración de contenidos, la cual facilita y complementa el proceso de enseñanza - aprendizaje del tema;, en conclusión, el simulador ayuda a disminuir el tiempo de realización de los ejercicios, demostraciones y experimentos donde el 90% de los estudiantes manifestaron que la herramienta los ayuda a entrenarse en sensopercepción visual, ya que lo pueden utilizar todas las veces que sea necesario.
Why is the bandwidth of sodium observed to be narrower in photoemission experiments?
Creators: name: Yasuhara, H.
name: Yoshinaga, S.
name: Higuchi, M.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The experimentally predicted narrowing in the bandwidth of sodium is interpreted in terms of the non-local self-energy effect on quasi-particle energies of the electron liquid. The calculated self-energy correction is a monotonically increasing function of the wavenumber variable. The usual analysis of photo-emission experiments assumes the final state energies on the nearly-free-electron-like model and hence it incorrectly ascribes the non-local self-energy correction to the final state energies to the occupied state energies, thus leading to a seeming narrowing in the bandwidth.
description: 9 pages
Electron-Phonon Coupling from $\textit{Ab Initio}$ Linear-Response Theory within the $GW$ Method: Correlation-Enhanced Interactions and Superconductivity in Ba$_{1-x}$K$_x$BiO$_3$
Creators: name: Li, Zhenglu
name: Antonius, Gabriel
name: Wu, Meng
name: da Jornada, Felipe H.
name: Louie, Steven G.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a new first-principles linear-response theory of changes due to perturbations in the quasiparticle self-energy operator within the $GW$ method. This approach, named $GW$ perturbation theory ($GW$PT), is applied to calculate the electron-phonon ($e$-ph) interactions with the full inclusion of the $GW$ non-local, energy-dependent self-energy effects, going beyond density-functional perturbation theory. Avoiding limitations of the frozen-phonon technique, $GW$PT gives access to $e$-ph matrix elements at the $GW$ level for all phonons and scattering processes, and the computational cost scales linearly with the number of phonon modes (wavevectors and branches) investigated. We demonstrate the capabilities of $GW$PT by studying the $e$-ph coupling and superconductivity in Ba$_{0.6}$K$_{0.4}$BiO$_3$. We show that many-electron correlations significantly enhance the $e$-ph interactions for states near the Fermi surface, and explain the observed high superconductivity transition temperature of Ba$_{0.6}$K$_{0.4}$BiO$_3$ as well as its doping dependence.
Quark mixings as a test of a new symmetry of quark Yukawa couplings
Creators: name: González, H.
name: W., S. R. Juárez
name: Kielanowski, P.
name: Castro, G. López
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Based on the hierarchy exhibited by quarks masses at low energies, we assume that Yukawa couplings of up and down quarks are related by $Y_u\propto Y_d^2$ at grand unification scales. This ansatz gives rise to a symmetrical CKM matrix at the grand unification (GU) scale. Using three specific models as illustrative examples for the evolution down to low energies, we obtain the entries and asymmetries of the CKM matrix which are in very good agreement with their measured values. This indicates that the small asymmetry of the CKM matrix at low energies may be the effect of the renormalization group evolution only.
description: LaTeX file, 10 pages including 1 table
Euscorpius (Polytrichobothrius) italicus
Creators: name: Yağmur, Ersen Aydın
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Scorpiones
Euscorpiidae
Euscorpius
Euscorpius italicus

description: Euscorpius (Polytrichobothrius) italicus
(Herbst, 1800)
 MATERIAL (not examined). Turkey, İstanbul, 13 September 1972, leg. E. Lampe (NMM/0189); İstanbul, at km 20 on the road to İzmit, 13 September 1972, leg. E. Lampe (NMM/0190); İstanbul, 1893, leg.? (NMM/0202).
 COMMENTS. Euscorpius italicus was recorded by Pavesi (1876) from Turkey for the first time, from İstanbul. Existence of E. italicus there was confirmed by Vachon (1951), Kinzelbach (1982) and Karataş (2006). E. italicus specimens listed by Kinzelbach (1982: 65) were not examined in this study due to its abundance in İstanbul and no conflict in systematics. It is a synanthropic species with a very little variation across its wide range including Turkey (Gantenbein et al., 2006).
description: Published as part of Yağmur, Ersen Aydın, 2021, On R. Kinzelbach's euscorpiid specimens from Turkey deposited in the Naturhistorisches Museum Mainz, Germany (Scorpiones: Euscorpiidae), pp. 1-5 in Euscorpius 334 on page 4, DOI: 10.5281/zenodo.5742093
Distribution of a Global CO2 Budget - A Comparison of Resource Sharing Models
Creators: name: Sargl, Manfred
name: Wiegand, Daniel
name: Wittmann, Günter
name: Wolfsteiner, Andreas
Publisher: name: Zenodo
Year: 2024
Subjects: climate policy
Paris Ambition Mechanism
Paris compatible emission paths
emission paths
CO2 budget
resource sharing
burden sharing
effort sharing
Global Stocktake
NDCs
Paris Agreement

description: In view of the connection between the cumulative CO2 emissions and global warming, as described in the IPCC reports, the key question arises how a globally remaining budget could be realistically distributed among countries. The discussion of this issue can contribute to NDCs that are Paris-compatible in sum.

Resource sharing models directly address the allocation of such a remaining global budget. This article will therefore give an overview of the properties of resource sharing models that, in principle, use current emissions and population as a distribution key. With the current emissions, the current reality and with the population climate justice can be mapped.

We also identified a possible additional helpful assessment criterion for NDCs: the implicit weighting of population.

Web applications for analysed approaches:

Regensburg Model: http://RM.climate-calculator.info

ESPM: http://short.national-budgets.climate-calculator.info

RM Scenario Types: http://paths.climate-calculator.info
The Role of Engagement, Brand Equity, and Trust
Creators: name: Santos, Sara
name: Leitão, Joana
name: Rego, Belmiro
Publisher: name: International Journal of Business Innovation
Year: 2024

description: Over the past few years, the consumer has increasingly engaged with brands on social networks, thus becoming crucial to evaluating trust and brand equity. This study aims to understand whether trust and brand equity are essential to the consumer in the case of telecommunications brands. A quantitative methodology was used through a survey, where the variables of positive engagement, negative engagement, brand trust, and brand equity were analyzed. In addition to the survey, a content analysis was conducted on the social networks of the three Portuguese telecommunications brands under study (Meo, Nos, and Vodafone). The study concludes that brand equity and trust are essential to consumers' opinions. There is also greater positive engagement than negative engagement with Facebook telecommunications brands. In addition, the frequency of brand publications does not result in greater Facebook engagement.
description: International Journal of Business Innovation, Volume 3 Issue 1 (2024)
La educación a distancia y el e-learning en la sociedad de la información: una revisión conceptual
Creators: name: Cardona, Marcela
Publisher: name: figshare
Year: 2019
Subjects: Computer Engineering

description: Este artículo se realizó con el objetivo de tener una revisión actualizada de los elementos de la Educación a Distancia(EaD), su relación con el e-learning y el proceso de aprendizaje de los individuos dentro de la Sociedad de laInformación (SI). El documento describe la evolución de los conceptos EaD y e-learning, las características relevantes de cada uno, así como la caracterización del proceso de aprendizaje. Además, presenta información delas más sobresalientes teorías de aprendizaje indicando las ventajas y desventajas en el proceso formativo. Como conclusión, se puede decir que a pesar de no existir definiciones unificadas para EaD y e-learning, hay características que se mantienen en el tiempo, las cuales se tuvieron en cuenta para la nueva definición de e-learning, expresada en el texto. Finalmente, la SI ha permitido que la evolución y uso de las Tecnologías de la Información y Comunicación se conviertan en herramientas para potenciar el aprendizaje, especialmente en la EaD.
A generalized spherical version of the Blume-Emery-Griffits model with ferromagnetic and antiferromagnetic interactions
Creators: name: Savel'ev, S. E.
name: Ramirez-Santiago, Guillermo
Publisher: name: arXiv
Year: 2000
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have investigated analitycally the phase diagram of a generalized spherical version of the Blume-Emery-Griffiths model that includes ferromagnetic or antiferromagnetic spin interactions as well as quadrupole interactions in zero and nonzero magnetic field. We show that in three dimensions and zero magnetic field a regular paramagnetic-ferromagnetic (PM-FM) or a paramagnetic-antiferromagnetic (PM-AFM) phase transition occurs whenever the magnetic spin interactions dominate over the quadrupole interactions. However, when spin and quadrupole interactions are important, there appears a reentrant FM-PM or AFM-PM phase transition at low temperatures, in addition to the regular PM-FM or PM-AFM phase transitions. On the other hand, in a nonzero homogeneous external magnetic field $H$, we find no evidence of a transition to the state with spontaneous magnetization for FM interactions in three dimensions. Nonethelesss, for AFM interactions we do get a scenario similar to that described above for zero external magnetic field, except that the critical temperatures are now functions of $H$. We also find two critical field values, $H_{c1}$, at which the reentrance phenomenon dissapears and $H_{c2}$ ($H_{c1}\approx 0.5H_{c2}$), above which the PM-AFM transition temperature vanishes.
description: 21 pages, 6 figs. Title changed, abstract and introduction as well as section IV were rewritten relaxing the emphasis on spin S=1 and Figs. 5 an 6 were improved in presentation. However, all the results remain valid. Accepted for publication in Phys. Rev. B
Additional file 1: of Patient perspectives on use of electronic health records for research recruitment
Creators: name: Beskow, Laura
name: Brelsford, Kathleen
name: Hammack, Catherine
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Science Policy

description: Table S1â 1. Study location (county) demographics. Table S1â 2. Participant questionnaire development. Table S1â 3. Consolidated Criteria for Reporting Qualitative Research (COREQ). (PDF 164 kb)
Paris-compatible Emission Targets for the Six Major Emitters
Creators: name: Sargl, Manfred
name: Wiegand, Daniel
name: Wittmann, Günter
name: Wolfsteiner, Andreas
Publisher: name: Zenodo
Year: 2025
Subjects: Climate policy
Paris ambition mechanism
Paris compatible NDCs
Paris compatible emission paths
Paris compatible emission targets
NDCs
Effort sharing
NDC
CO2 budget
national CO2 budget
CO2 budgets
Global Stocktake

description: What are realistic emissions targets for the world's six largest emitters that sum up to Paris-compatible emissions?

To answer this question, this paper varies key framework data on the available global CO2 budget and the sharing mechanism to calculate top-down national emissions targets using the Extended Smooth Pathway Model (ESPM). The results will also be compared with the NDCs submitted by the six largest emitters.

The Paris Ambition Mechanism is based on a bottom-up approach. However, if the national targets are not Paris-compatible in sum, the question arises whether national targets represent an adequate contribution to the necessary global efforts. An open and transparent discussion of this issue can contribute to NDCs that are Paris-compatible in sum.

Here is a simplified web apps to reproduce the results:

National CO2 budgets: http://national-budgets.climate-calculator.info

Emission paths that comply with a predetermined budget: https://paths.climate-calculator.info