cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Short Distance QCD Contribution to the Electroweak Mass Difference of Pions
Creators: name: Natale, A. A.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is known that the short distance QCD contribution to the mass difference of pions is quadratic on the quark masses, and irrelevant with respect to the long distance part. It is also considered in the literature that its calculation contain infinities, which should be absorbed by the quark mass renormalization. Following a prescription by Craigie, Narison and Riazuddin, of a renormalization group improved perturbation theory to deal with the electromagnetic mass shift problem in QCD, we show that the short distance QCD contribution to the electroweak pion mass difference (with $m_u=m_d\neq0$) is finite and, of course, its value is negligible compared to other contributions.
description: 8 pages, Revtex, submitted to Phys.Rev.D
Additional file 16 of An identical-by-descent segment harbors a 12-bp insertion determining fruit softening during domestication and speciation in Pyrus
Creators: name: Song, Bobo
name: Li, Xiaolong
name: Cao, Beibei
name: Zhang, Mingyue
name: Korban, Schuyler S.
name: Yu, Li’ang
name: Yang, Wenxi
name: Zhao, Kejiao
name: Li, Jiaming
name: Wu, Jun
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 16: Fig. S3. KEGG analysis of genes within the 3 Mbp IBD-ER.
Quantum Phase Transitions in the Shastry-Sutherland Model for $\rm\bf SrCu_2 (BO_3)_2$
Creators: name: Koga, Akihisa
name: Kawakami, Norio
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the quantum phase transitions in the frustrated antiferromagnetic Heisenberg model for $\rm SrCu_2(BO_3)_2$ by using the series expansion method. It is found that a novel spin-gap phase, which is adiabatically connected to the plaquette-singlet phase, exists between the dimer and the magnetically ordered phases known so far. When the ratio of the competing exchange couplings $α(=J'/J)$ is varied, this spin-gap phase exhibits the first- (second-) order quantum phase transition to the dimer (the magnetically ordered) phase at the critical point $α_{c1}=0.677(2)$ ($α_{c2}=0.86(1)$). Our results shed light on some controversial arguments about the nature of the quantum phase transitions in this model.
description: 4 pages, accepted for publication in Phys. Rev. Lett
Some Challenges of Specifying Concurrent Program Components
Creators: name: Hayes, Ian J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Programming Languages (cs.PL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The purpose of this paper is to address some of the challenges of formally specifying components of shared-memory concurrent programs. The focus is to provide an abstract specification of a component that is suitable for use both by clients of the component and as a starting point for refinement to an implementation of the component. We present some approaches to devising specifications, investigating different forms suitable for different contexts. We examine handling atomicity of access to data structures, blocking operations and progress properties, and transactional operations that may fail and need to be retried.
description: In Proceedings Refine 2018, arXiv:1810.08739
Braunia incana Mull. Hal.
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Leucodontales
Hedwigiaceae
Braunia
Braunia incana

description: Braunia incana Müll. Hal.
 = Braunia cirrhifolia (Mitt.) A. Jaeger, fide VAN DER WIJK & al. (1959: 232).
 Specimen. – Roches éruptives, au NE du Cerro de San Tomas, mars 1881, Balansa 3683 (G, G00040401) [published in BESCHERELLE, 1885:17].
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 158, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
Frequency-dependent magnetotransport and particle dynamics in magnetic modulation systems
Creators: name: Badran, Esmael
name: Ulloa, Sergio E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze the dynamics of a charged particle moving in the presence of spatially-modulated magnetic fields. From Poincare surfaces of section and Liapunov exponents for characteristic trajectories we find that the fraction of pinned and runaway quasiperiodic orbits {\em vs}. chaotic orbits depends strongly on the ratio of cyclotron radius to the structure parameters, as well as on the amplitude of the modulated field. We present a complete characterization of the dynamical behavior of such structures, and investigate the contribution to the magnetoconductivity from all different orbits using a classical Kubo formula. Although the DC conductivity of the system depends strongly on the pinned and runaway trajectories, the frequency response reflects the topology of all different orbits, and even their unusual temporal behavior.
description: Submitted to PRB - 14 figure files - REVTEX text
Stock Market Portfolio Management: A Walk-through
Creators: name: Patel, Jayeshkumar Madhubhai
Publisher: name: figshare
Year: 2019
Subjects: Applied Computer Science

description: Stock market portfolio management has remained successful in drawing attention of number of researchers from the fields of computer science, finance and mathematics all around the world since years. Successfully managing stock market portfolio is the prime concernfor investors and fund managers in the financial markets. This paper is aimed to provide a walk-through to the stock market portfolio management. This paper deals with questions like what is stock market portfolio, how to manage it, what are the objectives behind managing it, what are the challenges in managing it. As each coin has two sides, each portfolio has two elements – risk and return. Regarding this, Markowitz’s Modern Portfolio Theory, or Risk-Return Model, to manage portfolio is analyzed in detail along with its criticisms, efficient frontier, and suggested state-of-the-art enhancements in terms of various constraints and risk measures. This paper also discusses other models tomanage stock market portfolio such as Capital Asset Pricing Model (CAPM) and Arbitrage Pricing Theory (APT) Model.
Axion-photon mixing in quantum field theory and vacuum energy
Creators: name: Capolupo, A.
name: De Martino, I.
name: Lambiase, G.
name: Stabile, An.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze axion--photon mixing in the framework of quantum field theory. The condensate structure of the vacuum for mixed fields induces corrections to the oscillation formulae and leads to non-zero energy of the vacuum for the component of the photon mixed with the axion. This energy generates a new effect of the vacuum polarization and it has the state equation of the cosmological constant, $w = -1$. This result holds for any homogeneous and isotropic curved space-time, as well as for diagonal metrics. Numerical estimates of the corrections to the oscillation formulae are presented by considering the intensity of the magnetic field available in the laboratory. Moreover, we estimate the vacuum energy density induced by axion--photon mixing in the Minkowski space-time. A value compatible with that of the energy density of the universe can be obtained for axions with a mass of $(10^{-3}-10^{-2}) eV$ in the presence of the strong magnetic fields that characterize astrophysical objects such as pulsars or neutron stars. In addition, a value of the energy density less than that of the Casimir effect is obtained for magnetic fields used in experiments such as PVLAS. The vacuum polarization induced by this energy could be detected in next experiments and it might provide an indirect proof of the existence of the axion--photon mixing. The quantum field theory effects presented in this work may lead to new methods for studying axion-like particles.
description: 8 pages, 2 figures. Accepted for publication on Phys. Lett. B
Unsupervised Abnormality Detection through Mixed Structure Regularization (MSR) in Deep Sparse Autoencoders
Creators: name: Freiman, Moti
name: Manjeshwar, Ravindra
name: Goshen, Liran
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Deep sparse auto-encoders with mixed structure regularization (MSR) in addition to explicit sparsity regularization term and stochastic corruption of the input data with Gaussian noise have the potential to improve unsupervised abnormality detection. Unsupervised abnormality detection based on identifying outliers using deep sparse auto-encoders is a very appealing approach for medical computer aided detection systems as it requires only healthy data for training rather than expert annotated abnormality. In the task of detecting coronary artery disease from Coronary Computed Tomography Angiography (CCTA), our results suggests that the MSR has the potential to improve overall performance by 20-30% compared to deep sparse and denoising auto-encoders.
description: Accepted for publication in the journal: "Medical Physics" (2019)
Bryum argenteum var. corrugatum Besch.
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Bryales
Bryaceae
Bryum
Bryum argenteum
Bryum argenteum var. corrugatum (hampe) besch.

description: Bryum argenteum var. corrugatum (Hampe) Besch.
 = Bryum argenteum Hedw., fide CRUM & STEERE (1957: 488).
 Specimen. – L’Assomption - sur la terre, dans les clairières des broussailles, 14 août 1874, Balansa 1259 (Herb. DC., G00042200) [published in BESCHERELLE, 1877: 263].
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 158, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
Additional file 4 of A member of wheat class III peroxidase gene family, TaPRX-2A, enhanced the tolerance of salt stress
Creators: name: Su, Peisen
name: Yan, Jun
name: Li, Wen
name: Wang, Liang
name: Zhao, Jinxiao
name: Ma, Xin
name: Li, Anfei
name: Wang, Hongwei
name: Kong, Lingrang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 4: Figure S1. Class III peroxidase phylogenetic tree. (a) Subfamily VI of class III peroxidases; (b) All subfamilies.
Photon-3-Pion And Pion-2-Photon Form Factors From Dynamical Constituent Quarks
Creators: name: Li, Xiaoyuan
name: Liao, Yi
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the form factors of the low energy anomalous pion-2-photon and photon-3-pion processes in the nonlocal chiral quark model which incorporates the momentum dependence of the dynamical quark mass and realizes correctly the chiral symmetries. The obtained slope parameter for pion-2-photon is in reasonable agreement with the direct experimental results but smaller than the ones invoking vector meson dominance. Our result for the photon-3-pion form factor interpolates between the two extremes of theoretical approaches, with the largest one provided by the vector meson dominance and the smallest one by the Schwinger-Dyson approach. But all of them are well below the single data point available so far. This situation will hopefully be clarified by the experiments at CEBAF and CERN.
description: 15 pages, Latex, 2 figs using Axodraw. Minor changes: (1) more detailed description of the model; (2) some re-wording for clarification
Primordial Magnetic Fields, Right Electrons, and the Abelian Anomaly
Creators: name: Joyce, M.
name: Shaposhnikov, M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the standard model there are charges with abelian anomaly only (e.g. right-handed electron number) which are effectively conserved in the early universe until some time shortly before the electroweak scale. A state at finite chemical potential of such a charge, possibly arising due to asymmetries produced at the GUT scale, is unstable to the generation of hypercharge magnetic field. Quite large magnetic fields ($\sim 10^{22}$ gauss at $T\sim 100$ GeV with typical inhomogeneity scale $ \sim \frac{ 10^6}{T}$) can be generated. These fields may be of cosmological interest, potentially acting as seeds for amplification to larger scale magnetic fields through non-linear mechanisms. Previously derived bounds on exotic $B-L$ violating operators may also be evaded.
description: Revised version, to appear in Phys. Rev. Lett.. Analysis has been extended to larger chemical potentials, for which large magnetic fields survive at the electroweak scale. Previous bounds on $B-L$ violating operators are also evaded in this case
Bruchia aurea Besch.
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Dicranales
Bruchiaceae
Bruchia
Bruchia aurea

description: Bruchia aurea Besch. in Mém. Soc. Sci. Nat. Cherbourg 21: 259. 1877.
 Type citation. – “Assomption, juillet 1876, Balansa 1261 ”.
 Type specimens. – Isotypes: L’Assomption, juillet 1876, Balansa 1261 (Herb. Boiss. [non-original Balansa label], G00046209; Herb. DC. [1878], G00046206).
 Type designation. – RUSHING (1986: 57): holotype (BM), isotypes (G, H-BR, NY, PC, S).
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 158, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
Additional file 5 of A member of wheat class III peroxidase gene family, TaPRX-2A, enhanced the tolerance of salt stress
Creators: name: Su, Peisen
name: Yan, Jun
name: Li, Wen
name: Wang, Liang
name: Zhao, Jinxiao
name: Ma, Xin
name: Li, Anfei
name: Wang, Hongwei
name: Kong, Lingrang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 5: Figure S2. Domain and exon-intron structure diagrams of class III peroxidase in A. thaliana, V. vinifera, T. aestivum, P. patens, T. dicoccoides, T. urartu, Ae. tauschii, B. distachyon, C. reinhardtii, Z. mays, O. sativa and S. moellendorffii. Filled boxes: red represents the PRX domain; white boxes represent the other exon regions; black boxes represent the untranslated regions (UTRs); lines represent the PRX introns; numbers 0, 1, and 2 represent the exon phases. The long introns are shortened by “//”.
Acceptor binding energies in GaN and AlN
Creators: name: Mireles, Francisco
name: Ulloa, Sergio E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We employ effective mass theory for degenerate hole-bands to calculate the acceptor binding energies for Be, Mg, Zn, Ca, C and Si substitutional acceptors in GaN and AlN. The calculations are performed through the 6$\times $6 Rashba-Sheka-Pikus and the Luttinger-Kohn matrix Hamiltonians for wurtzite (WZ) and zincblende (ZB) crystal phases, respectively. An analytic representation for the acceptor pseudopotential is used to introduce the specific nature of the impurity atoms. The energy shift due to polaron effects is also considered in this approach. The ionization energy estimates are in very good agreement with those reported experimentally in WZ-GaN. The binding energies for ZB-GaN acceptors are all predicted to be shallower than the corresponding impurities in the WZ phase. The binding energy dependence upon the crystal field splitting in WZ-GaN is analyzed. Ionization levels in AlN are found to have similar `shallow' values to those in GaN, but with some important differences, which depend on the band structure parameterizations, especially the value of crystal field splitting used.
description: REVTEX file - 1 figure
Correctness of Concurrent Objects under Weak Memory Models
Creators: name: Smith, Graeme
name: Winter, Kirsten
name: Colvin, Robert J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Programming Languages (cs.PL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: In this paper we develop a theory for correctness of concurrent objects under weak memory models. Central to our definitions is the concept of observations which determine when effects of operations become visible, and hence determine the semantics of objects, under a given memory model. The resulting notion of correctness, called object refinement, is generic as it is parameterised by the memory model under consideration. Our theory enforces the minimal constraints on the placing of observations and on the semantics of objects that underlie object refinement. Object refinement is suitable as a reference for correctness when proving new proof methods for objects under weak memory models to be sound and complete.
description: In Proceedings Refine 2018, arXiv:1810.08739. arXiv admin note: text overlap with arXiv:1802.04954
On phase transitions in two-dimensional disordered systems
Creators: name: Fendley, Paul
name: Konik, Robert M.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The low-energy limits of models with disorder are frequently described by sigma models. In two dimensions, most sigma models admit either a Wess-Zumino-Witten or a theta term. When such a term is present the model can have a stable critical point with gapless excitations. We describe how such a critical point appears, in particular in two-dimensional superconductors with disorder. The presence of such terms is required by the underlying (anomalous) symmetries of the original electron model. This indicates that the usual symmetry classes of disordered systems in two dimensions can be further refined. Conversely, our results also indicate that models previously thought to be in different universality classes are in fact the same once the appropriate extra terms are included.
description: 5 pages, new material on d_{x^2-y^2} superconductors, and an addition on the spin quantum Hall effect
Nonfactorizable contributions to the decay mode D^0 -> K^0 \bar{K^0}
Creators: name: Eeg, J. O.
name: Fajfer, S.
name: Zupan, J.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We point out that the decay mode D^0 -> K^0 \bar{K^0} has no factorizable contribution. In the chiral perturbation language, treating D^0 as heavy, the O(p) contribution is zero. We calculate the nonfactorizable chiral loop contributions of order O(p^3). Then, we use a heavy-light type chiral quark model to calculate nonfactorizable tree level terms, also of order O(p^3), proportional to the gluon condensate. We find that both the chiral loops and the gluon condensate contributions are of the same order of magnitude as the experimental amplitude.
description: 20 pages, 8 figures
title: Non occlusive mesenteric ischemia caused by diabetic ketoasidosis
Creators: name: Bilgili, Yasemin
Publisher: name: EURORAD
Year: 2021
Subjects: subject: Abdominal imaging
subject: Abdomen
subject: Emergency
subject: Gastrointestinal tract
subject: CT
subject: Acute
subject: Haemodynamics / Flow dynamics
subject: Ischaemia / Infarction
subject: Clinical Cases

description: Clinical History: 38-year-old female without a previous significant medical record admitted  to emergency department due to syncope.

Blood glucose was significantly high (520 mg/dl) and ketone body was positive in urine.

She had no response to painful stimulus.

description: 38 years, female
Barbula pallidoviridis Mull. Hal.
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Pottiales
Pottiaceae
Barbula
Barbula pallidoviridis

description: Barbula pallidoviridis Müll. Hal. in Hedwigia 36: 103. 1897.
 = Tortella humilis (Hedw.) Jenn., fide CRUM & STEERE (1957: 471).
 Type citation. – “Paraguay ‘bords du Mobay’ in truncis arborum, Julio 1881, B. Balansa Coll. 3652 et 3652a ”.  Type specimens. – Syntypes: Bords du Mbay, sur le tronc des arbres, juillet 1881, Balansa 3652 (G [1885],  G00042221; Herb. Boiss., G00042222; Herb. DC. [1884], G00042220) .
 Type designation. – None found.
 Specimens. – Guarapi, sur le tronc des arbres, juin 1879, Balansa 3652a (G [1885], G00042219; Herb. Boiss., G00042223; Herb. DC. [1884], G00042218) [published in BESCHERELLE, 1885: 17].
 Comments. – Number 3652a, with the locality “Bords du Mobay”, was used by MÜLLER (1897) as one of the two types of Barbula pallidoviridis Müll. Hal. The G specimens for collection number 3652a have different locality information and a different collection date than those cited in the protologue under the same number. The G material under number 3652a is thus not treated as potential type material herein.
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 158, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
Scalar Field Dynamics in Friedman Robertson Walker Spacetimes
Creators: name: Boyanovsky, D.
name: Cormier, D.
name: de Vega, H. J.
name: Holman, R.
name: Singh, A.
name: Srednicki, M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the non-linear dynamics of quantum fields in matter and radiation dominated universes, using the non-equilibrium field theory approach combined with the non-perturbative Hartree and the large N approximations. We examine the phenomenon of explosive particle production due to spinodal instabilities and parametric amplification in expanding universes with and without symmetry breaking. For a variety of initial conditions, we compute the evolution of the inflaton, its quantum fluctuations, and the equation of state. We find explosive growth of quantum fluctuations, although particle production is somewhat sensitive to the expansion of the universe. In the large N limit for symmetry breaking scenarios, we determine generic late time solutions for any flat Friedman-Robertson-Walker cosmology. We also present a complete and numerically implementable renormalization scheme for the equation of motion and the energy momentum tensor in flat FRW cosmologies. In this scheme the renormalization constants are independent of time and of the initial conditions.
description: 43 pages, 12 figures, uses epsf
The NAD+-dependent family of sirtuins in cerebral ischemia and preconditioning.
Creators: name: Khoury, Nathalie
name: Koronowski, Kevin
name: Young, Juan
name: Perez-Pinzon, Miguel
Publisher: name: Health Research Alliance
Year: 2019
Subjects: Neuroscience

description: This review summarizes the studies involving the sirtuin family of proteins in the context of preconditioning and cerebral ischemia.
Yanson point-contact spectroscopy of Weyl semimetal WTe2
Creators: name: Naidyuk, Yu. G.
name: Bashlakov, D. L.
name: Kvitnitskaya, O. E.
name: Aswartham, S.
name: Morozov, I. V.
name: Chernyavskii, I. O.
name: Shipunov, G.
name: Fuchs, G.
name: Drechsler, S. -L.
name: Hühne, R.
name: Nielsch, K.
name: Büchner, B.
name: Efremov, D. V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We carried out point contact (PC) investigation of WTe2 single crystals. We measured Yanson d2V/dI2 PC spectra of the electron-phonon interaction (EPI) in WTe2. The spectra demonstrate a main phonon peak around 8 meV and a shallow second maximum near 16 meV. Their position is in line with the calculation of the EPI spectra of WTe2 in the literature, albeit phonons with higher energy are not resolved in our PC spectra. An additional contribution to the spectra is present above the phonon energy, what may be connected with the peculiar electronic band structure and need to be clarified. We detected tiny superconducting features in d2V/dI2 close to zero bias, which broadens by increasing temperature and blurs above 6K. Thus, (surface) superconductivity may exist in WTe2 with a topologically nontrivial state. We found a broad maximum in dV/dI at large voltages (>200 mV) indicating change of conductivity from metallic to semiconducting type. The latter might be induced by the high current density (~10^8 A/cm^2) in the PC and/or local heating, thus enabling the manipulation of the quantum electronic states at the interface in the PC core.
description: 4 figs., 11 pages with supplement, will be presented at APS March Meeting, March 4-8, Boston
First-order quantum phase transition in the orthogonal-dimer spin chain
Creators: name: Koga, Akihisa
name: Okunishi, Kouichi
name: Kawakami, Norio
Publisher: name: arXiv
Year: 2000
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the low-energy properties of the orthogonal-dimer spin chain characterized by a frustrated dimer-plaquette structure. When the competing antiferromagnetic couplings are varied, the first-order quantum phase transition occurs between the dimer and the plaquette phases, which is accompanied by nontrivial features due to frustration: besides the discontinuity in the lowest excitation gap at the transition point, a sharp level-crossing occurs for the spectrum in the plaquette phase. We further reveal that the plateau in the magnetization curve at 1/4 of the full moment dramatically changes its character in the vicinity of the critical point. It is argued that the first-order phase transition in this system captures some essential properties found in the two-dimensional orthogonal-dimer model proposed for $\rm SrCu_2(BO_3)_2$.
description: 7 pages, submitted to Phys. Rev. B
Refining Santa: An Exercise in Efficient Synchronization
Creators: name: Sekerinski, Emil
name: Yao, Shucai
Publisher: name: arXiv
Year: 2018
Subjects: subject: Programming Languages (cs.PL)
subject: Logic in Computer Science (cs.LO)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The Santa Claus Problem is an intricate exercise for concurrent programming. This paper outlines the refinement steps to develop a highly efficient implementation with concurrent objects, starting from a simple specification. The efficiency of the implementation is compared to those in other languages.
description: In Proceedings Refine 2018, arXiv:1810.08739
title: Datenanalyse zu potentiellen Unterschieden im Trinkwasserbedarf verschiedener Siedlungsgebiete anhand siedlungsstruktureller Kennzahlen unter Verwendung eines automatisierten FME (Feature Manipulation Engine)-Prozesses
Creators: name: Kip, Frederik S.
Publisher: name: UNSPECIFIED
Year: 2021

description: Für die Erstellung von exakten Trinkwasserbedarfsprognosen für einzelne Siedlungsgebiete wird eine Methode entwickelt, mit Hilfe von frei verfügbaren Daten statistische Zusammenhänge zwischen Bevölkerungsdichten und siedlungsstrukturellen Kennzahlen zu identifizieren. Mit Hilfe einer speziellen Konvertierungs- und Transformationssoftware wird eine Möglichkeit zur automatisierten Verarbeitung von im Bundesland Nordrhein-Westfalen frei verfügbaren Geodaten, wie z.B. 3D-Gebäude-, Kataster- und Zensusdaten geschaffen. Durch die EU-weite Normung dieser Daten ist diese Automatisierung auf andere Regionen übertragbar. Die siedlungsstrukturellen Kennzahlen, wie die Grundflächenzahl, die Geschossflächenzahl oder auch Kompaktheit, werden aus 3D-Gebäudedaten und Katasterdaten berechnet und in den Datensätzen für einzelne Flurstücke gespeichert. Zensusdaten werden auf einzelne Flurstücke interpoliert. Aus den Daten werden durch eine Clusteranalyse Gruppen gebildet, deren Mitglieder sich in ihren Eigenschaften stark ähneln, gegen andere Gruppen stark abgegrenzt sind. So lassen sich durch ein Geoinformationssytem Versorgungsgebiete identifizieren, bei denen ein mittlerer Wasserbedarf die geringste Abweichung von den Einzelverbräuchen darstellt.
Charm-Baryon Production in Proton-Proton Collisions
Creators: name: He, Min
name: Rapp, Ralf
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent measurements of charm-baryon production in proton-proton collisions at the LHC have found a surprisingly large yield relative to those of $D$-mesons. We propose that this observation can be explained by the statistical hadronization model (SHM), by employing a largely augmented set of charm-baryon states beyond the current listings of the particle data group. We estimate the additional states using guidance from the relativistic quark model and from lattice QCD. Using charm- and strange-quark fugacity factors to account for the well-known suppression of heavy flavor in elementary collisions, we compute the yields and spectra of $D$, $D_s$ and $Λ_c$ hadrons in proton-proton collisions at $\sqrt{s}=5$\,TeV. Our main finding is that the enhanced feeddown from excited charm baryons can account for the $Λ_c/D^0$ ratio measured by ALICE at midrapidity, with some caveat for the forward-rapidity LHCb data. Furthermore, assuming independent fragmentation of charm quarks but with the hadronic ratios fixed by the SHM, the measured transverse-momentum ($p_T$) spectra of $D$-mesons and $Λ_c$ can also be described; in particular, the low-$p_T$ enhancement in the observed $Λ_c/D^0$ ratio is attributed to the enhanced feeddown from "missing" charm-baryon states. We comment on the implications of these findings for measurements of $D_s$ and $Λ_c$ in heavy-ion collisions.
description: 7 pages, 3 figures; Ref.[17] updated
Campylopus amabilis Paris
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Dicranales
Dicranaceae
Campylopus
Campylopus amabilis

description: Campylopus amabilis (Müll. Hal.) Paris
 = Campylopus pyriformis (Schultz) Brid., fide FRAHM (1982: 49).
 Specimens. – Cordillère de Péribebui, dans les terrains dénudés, 1879, Balansa 3660 (G [1885], G00048097; Herb. Boiss., G00048096; Herb. DC. [1884], G00048095) [published in BESCHERELLE, 1885: 17].
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 159, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
Correlation and symmetry effects in transport through an artificial molecule
Creators: name: Ramirez, F.
name: Cota, E.
name: Ulloa, S. E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spectral weights and current-voltage characteristics of an artificial diatomic molecule are calculated, considering cases where the dots connected in series are in general different. The spectral weights allow us to understand the effects of correlations, their connection with selection rules for transport, and the role of excited states in the experimental conductance spectra of these coupled double dot systems (DDS). An extended Hubbard Hamiltonian with varying interdot tunneling strength is used as a model, incorporating quantum confinement in the DDS, interdot tunneling as well as intra- and interdot Coulomb interactions. We find that interdot tunneling values determine to a great extent the resulting eigenstates and corresponding spectral weights. Details of the state correlations strongly suppress most of the possible conduction channels, giving rise to effective selection rules for conductance through the molecule. Most states are found to make insignificant contributions to the total current for finite biases. We find also that the symmetry of the structure is reflected in the I-V characteristics, and is in qualitative agreement with experiment.
description: 25 figure files - REVTEX - submitted to PRB
Anacalypta paraguensis Besch.
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Dicranales
Rhachitheciaceae
Anacalypta
Anacalypta paraguensis

description: Anacalypta paraguensis Besch. in Mém. Soc. Sci. Nat. Cherbourg 21: 261. 1877.
 Ξ Uleastrum paraguense (Besch.) W. R. Buck in Candollea 40: 203. 1985.
 Type citation. – “Peragu [Pirayu], sur le tronc du Cocos yatai, Balansa 1220 ”.  Type specimens. – Syntypes: Pirayu, sur le tronc du Cocos yataï, mai 1877, Balansa 1220 (G [1878], G00048151;  Herb. Boiss., G00048152) .
 Type designation. – Type designation not indicated in BUCK (1985).
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 157, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
A Chandra Survey of Milky Way Globular Clusters II: Testing the Hills-Heggie Law
Creators: name: Cheng, Zhongqun
name: Li, Zhiyuan
name: Xu, Xiaojie
name: Li, Xiangdong
name: Zhu, Zhenlin
name: Fang, Taotao
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Binary-single and binary-binary encounters play a pivotal role in the evolution of star clusters, as they may lead to the disruption or hardening of binaries, a novel prediction of the Hills-Heggie law. Based on our recent {\it Chandra} survey of Galactic globular clusters (GCs), we revisit the role of stellar dynamical interactions in GCs, focusing on main-sequence (MS) binary encounters as a potential formation channel of the observed X-ray sources in GCs. We show that the cumulative X-ray luminosity ($L_X$), a proxy of the total number of X-ray-emitting binaries (primarily cataclysmic variables and coronally active binaries) in a given GC, is highly correlated with the MS binary encounter rate ($Γ_{b}$), as $L_X \propto Γ_{b}^{0.77\pm0.11}$. We further test the Hills-Heggie law against the {\it binary hardness ratio}, defined as the relative number of X-ray-emitting hard binaries to MS binaries and approximated by $L_{X}/(L_{K}f_{b})$, with $L_{K}$ being the GC K-band luminosity and $f_b$ the MS binary fraction. We demonstrate that the binary hardness ratio of most GCs is larger than that of the Solar neighborbood stars, and exhibits a positive correlation with the cluster specific encounter rate ($γ$), as $L_{X}/(L_{K}f_{b}) \propto γ^{0.65\pm0.12}$. We also find a strong correlation between the binary hardness ratio and cluster velocity dispersion ($σ$), with $L_{X}/(L_{K}f_{b}) \propto σ^{1.71\pm0.48}$, which is consistent with the Hills-Heggie law. We discuss the role of binary encounters in the context of the Nuclear Star Cluster, arguing that the X-ray-emitting, close binaries detected therein could have been predominatly formed in GCs that later inspiralled to the Galactic center.
description: 11pages, 2 figures, 1 tables, accepted for publication in ApJ
Additional file 1: of Characterizing the transitioning epidemiology of herpes simplex virus type 1 in the USA: model-based predictions
Creators: name: Ayoub, Houssein
name: Chemaitelly, Hiam
name: Abu-Raddad, Laith
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
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: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Supplemental information including technical details about the mathematical model (Supplemental Information 1), the parameter values (Supplemental Information 2), and HSV-1 genital herpes 50% seroprevalence turning point (Supplemental Information 3). Tables S1-S2. Figure S1-S7. (DOCX 3158 kb)
Orientationally-averaged diffusion-attenuated magnetic resonance signal for locally-anisotropic diffusion
Creators: name: Herberthson, Magnus
name: Yolcu, Cem
name: Knutsson, Hans
name: Westin, Carl-Fredrik
name: Özarslan, Evren
Publisher: name: arXiv
Year: 2018
Subjects: subject: Applied Physics (physics.app-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Diffusion-attenuated MR signal for heterogeneous media has been represented as a sum of signals from anisotropic Gaussian sub-domains. Any effect of macroscopic (global or ensemble) anisotropy in the signal can be removed by averaging the signal values obtained by differently oriented experimental schemes. The resulting average signal is identical to what one would get if the micro-domains are isotropically (e.g., randomly) distributed, which is the case for "powdered" specimens. We provide exact expressions for the orientationally-averaged signal obtained via general gradient waveforms when the microdomains are characterized by a general diffusion tensor possibly featuring three distinct eigenvalues. Our results are expected to be useful in not only multidimensional diffusion MR but also solid-state NMR spectroscopy due to the mathematical similarities in the two fields.
description: 13 pages (manuscript) + 12 pages (supplementary material), 4 figures
Fermion propagator in out of equilibrium quantum-field system and the Boltzmann equation
Creators: name: Niégawa, A.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We aim to construct from first principles a perturbative framework for studying nonequilibrium quantum-field systems that include massless Dirac fermions. The system of our concern is quasiuniform system near equilibrium or nonequilibrium quasistationary system. We employ the closed-time-path formalism and use the so-called gradient approximation. Essentially no further approximation is introduced. We construct a fermion propagator, with which a well-defined perturbative framework is formulated. In the course of construction of the framework, we obtain the generalized Boltzmann equation (GBE) that describes the evolution of the number-density functions of (anti)fermionic quasiparticles.
description: 27 pages
Maxwell's equations in the context of the Fock transformation and the magnetic monopole
Creators: name: Takka, Naimi
name: Bouda, Ahmed
name: Foughali, Taoufik
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the R-Minkowski space-time, which we recently defined from an appropriate deformed Poisson brackets that reproduce the Fock coordinate transformation, we derive an extended form for Maxwell's equations by using a generalized version of Feynman's approach. Also, we establish in this context the Lorentz force. As in deformed special relativity, modifying the angular momentum in such a way as to restore the R-Lorentz algebra generates the magnetic Dirac monopole.
Aulacopilum balansae Mull. Hal.
Creators: name: Price, Michelle J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Orthotrichales
Erpodiaceae
Aulacopilum
Aulacopilum balansae

description: Aulacopilum balansae Müll. Hal. in Flora 70: 447. 1887.
 = Erpodium glaucum (Wilson) I. G. Stone, fide STONE (1997: 487).
 Type citation. – “Guarapi, in truncis Aurantiorum, Junio 1881, Balansa 3643 ”.
 Type specimens. – Syntypes: Guarapi, sur le tronc des orangers, juin 1881, Balansa 3643 (G [1885], G00042261; Herb. Boiss., G00042262; Herb. Boiss., G00042263; Herb. DC. [1884], G00042264).
 Type designation. – None found.
 Comments. – Number 3643 was also used as the original specimen by BESCHERELLE (1885: 18) for the nomen nudum “ Aulacopilum paraguense ”.
description: Published as part of Price, Michelle J., 2012, Catalogue of the Benjamin Balansa moss collections from Paraguay in Herbarium Genavense (G), pp. 153-179 in Candollea 67 (1) on page 158, DOI: 10.15553/c2012v671a17, http://zenodo.org/record/5719346
Additional file 1: of Clear aligner treatment: different perspectives between orthodontists and general dentists
Creators: name: DâApuzzo, Fabrizia
name: Perillo, Letizia
name: Carrico, Caroline
name: Castroflorio, Tommaso
name: Grassia, Vincenzo
name: Lindauer, Steven
name: Shroff, Bhavna
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology

description: Final version of the Questionnaire. (PDF 122 kb)
Investigation of routes and funnels in protein folding by free energy functional methods
Creators: name: Plotkin, Steven S.
name: Onuchic, Jose N.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We use a free energy functional theory to elucidate general properties of heterogeneously ordering, fast folding proteins, and we test our conclusions with lattice simulations. We find that both structural and energetic heterogeneity can lower the free energy barrier to folding. Correlating stronger contact energies with entropically likely contacts of a given native structure lowers the barrier, and anticorrelating the energies has the reverse effect. Designing in relatively mild energetic heterogeneity can eliminate the barrier completely at the transition temperature. Sequences with native energies tuned to fold uniformly, as well as sequences tuned to fold by a single or a few routes, are rare. Sequences with weak native energetic heterogeneity are more common; their folding kinetics is more strongly determined by properties of the native structure. Sequences with different distributions of stability throughout the protein may still be good folders to the same structure. A measure of folding route narrowness is introduced which correlates with rate, and which can give information about the intrinsic biases in ordering due to native topology. This theoretical framework allows us to systematically investigate the coupled effects of energy and topology in protein folding, and to interpret recent experiments which investigate these effects.
description: 12 pages, 1 figure, to appear in Proc. Natl. Acad. Sci
SENSEI: Direct-Detection Constraints on Sub-GeV Dark Matter from a Shallow Underground Run Using a Prototype Skipper-CCD
Creators: name: Abramoff, Orr
name: Barak, Liron
name: Bloch, Itay M.
name: Chaplinsky, Luke
name: Crisler, Michael
name: Dawa
name: Drlica-Wagner, Alex
name: Essig, Rouven
name: Estrada, Juan
name: Etzion, Erez
name: Fernandez, Guillermo
name: Gift, Daniel
name: Taenzer, Joseph
name: Tiffenberg, Javier
name: Haro, Miguel Sofo
name: Volansky, Tomer
name: Yu, Tien-Tien
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present new direct-detection constraints on eV-to-GeV dark matter interacting with electrons using a prototype detector of the Sub-Electron-Noise Skipper-CCD Experimental Instrument. The results are based on data taken in the MINOS cavern at the Fermi National Accelerator Laboratory. We focus on data obtained with two distinct readout strategies. For the first strategy, we read out the Skipper-CCD continuously, accumulating an exposure of 0.177 gram-days. While we observe no events containing three or more electrons, we find a large one- and two-electron background event rate, which we attribute to spurious events induced by the amplifier in the Skipper-CCD readout stage. For the second strategy, we take five sets of data in which we switch off all amplifiers while exposing the Skipper-CCD for 120k seconds, and then read out the data through the best prototype amplifier. We find a one-electron event rate of (3.51 +- 0.10) x 10^(-3) events/pixel/day, which is almost two orders of magnitude lower than the one-electron event rate observed in the continuous-readout data, and a two-electron event rate of (3.18 +0.86 -0.55) x 10^(-5) events/pixel/day. We again observe no events containing three or more electrons, for an exposure of 0.069 gram-days. We use these data to derive world-leading constraints on dark matter-electron scattering for masses between 500 keV to 5 MeV, and on dark-photon dark matter being absorbed by electrons for a range of masses below 12.4 eV.
description: 5 pages, submitted to PRL
Zeeman splitting of shallow donors in GaN
Creators: name: Mireles, Francisco
name: Ulloa, Sergio E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Zeeman splitting of the donor spectra in cubic- and hexagonal-GaN are studied using an effective mass theory approach. Soft-core pseudopotentials were used to describe the chemical shift of the different substitutional dopants. The donor ground states calculated range from 29.5 to 33.7 meV, with typically 1 meV higher binding in the hexagonal phase. Carbon is found to produce the largest donor binding energy. The ionization levels and excited states are in excellent agreement with Hall and optical measurements, and suggest the presence of residual C in recent experiments.
description: REVTEX file - 2 figures
Additional file 19 of An identical-by-descent segment harbors a 12-bp insertion determining fruit softening during domestication and speciation in Pyrus
Creators: name: Song, Bobo
name: Li, Xiaolong
name: Cao, Beibei
name: Zhang, Mingyue
name: Korban, Schuyler S.
name: Yu, Li’ang
name: Yang, Wenxi
name: Zhao, Kejiao
name: Li, Jiaming
name: Wu, Jun
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 19: Fig. S6. Sanger DNA sequencing of the CAMTA3 gene in Asian and European pears showing the 9-bp insertion mutation unique to Asian pears. (A) Sequence alignment of the coding sequences of the PbCAMTA3 gene from eight European and nine Asian pear accessions. (B) Gene structure showing the introns and exons of PbCAMTA3 (upper) and the predicted domains (IPT (transcription factor immunoglobulin), IQ motifs (calmodulin-binding), CG-1 (a DNA-binding domain specific to sequence), and ankyrin (ANK) repeats) in the PbCAMTA3 protein structure.