cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A new route for the synthesis of functionalized benzothiadiazine 1,1-dioxide derivatives via intramolecular C–H activation reactions of N,N′,N′′-trisubstituted guanidines and benzenesulfonylchloride
Creators: name: Nazari, Maryam
name: Nematpour, Manijeh
name: Rezaee, Elham
name: Jahani, Mehdi
name: Sayyed Abbas Tabatabai
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 111714 Mental Health
subject: FOS: Health sciences

description: In this study, a simple and appropriate procedure for the synthesis of functionalized benzothiadiazine 1,1-dioxide with good yields via the Cu-catalyzed intramolecular C–H activation reaction from benzenesulfonylchloride and N,N′,N′′-trisubstitutedguanidines, generated by copper(II) oxide-catalyzed hydroamination of carbodiimides, is reported.
Effective Meson Lagrangian with Chiral and Heavy Quark Symmetries from Quark Flavor Dynamics
Creators: name: Ebert, D.
name: Feldmann, T.
name: Friedrich, R.
name: Reinhardt, H.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: By bosonization of an extended NJL model we derive an effective meson theory which describes the interplay between chiral symmetry and heavy quark dynamics. This effective theory is worked out in the low-energy regime using the gradient expansion. The resulting effective lagrangian describes strong and weak interactions of heavy $B$ and $D$ mesons with pseudoscalar Goldstone bosons and light vector and axial--vector mesons. Heavy meson weak decay constants, coupling constants and the Isgur--Wise function are predicted in terms of the model parameters partially fixed from the light quark sector. Explicit $SU(3)_F$ symmetry breaking effects are estimated and, if possible, confronted with experiment.
description: 31 pages (LaTex); HUB--IEP--94/8, UNIT\"U-THEP-11/94
Lettre de Karl Frederik Ferber à Jean-François Séguier, 1770-11-30
Creators: name: Ferber, Karl Frederik
name: Ferber, Karl Frederik
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021
Subjects: Librairie

description: [transcription] Monsieur,

J'ai eu l'honneur de vous écrire le 20e juin passé pour répondre à votre lettre du 16 du même mois et je ne doute pas que ma lettre ne vous soit parvenue. Ayant eu depuis peu la nouvelle de mon ami de Stockholm que l'ouvrage de Monsieur de Linné, que je lui avais demandé pour vous, Monsieur, a été remis à un capitaine de vaisseau qui en est parti il y a six semaines pour Marseille, je crois qu'il vous fera plaisir d'apprendre que ledit ouvrage ne tardera d'arriver. Mais ce qui me fait de la peine c'est que ce capitaine restera deux mois à Marseille et [fol. 12 v] par conséquent son arrivée à Sète ne sera que dans environ trois mois, ce qui différera le plaisir que j'aurai de vous l'offrir. En attendant, j'ai l'honneur d'être avec le plus parfait respect.

Monsieur,

Votre très humble et très obéissant serviteur,

Charles F. Ferber

A Montpellier, le 30 novembre 1770.
description: [reférence bibliographique citée] Linné, Carl von, Systema naturae, 12e éd., Stockholm, 1766-1768, 3 vol.
description: Source: [lieu de Conservation] Nîmes, Bibliothèque Carré d'Art [cote]ms. 94_1, fol. 12-13
description: Source: ark:/12148/btv1b100150711
The Complex Phase Lag Behavior of the 3-12 Hz Quasi-Periodic Oscillations during the Very High State of XTE J1550-564
Creators: name: Wijnands, Rudy
name: Homan, Jeroen
name: van der Klis, Michiel
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study of the complex phase lag behavior of the low-frequency (<20 Hz) quasi-periodic oscillations (QPOs) in the X-ray transient and black-hole candidate XTE J1550-564 during its very high state. We distinguish two different types of low-frequency QPOs, based on their coherence and harmonic content. The first type is characterized by a 6 Hz QPO with a Q (the QPO frequency divided by the QPO width) of <3 and with a harmonic at 12 Hz. The second type of QPO is characterized by a 6 Hz QPO with a Q value of >6 and with harmonics at 3, 12, 18, and possibly at 9 Hz. Not only the Q values and the harmonic content of the two types are different, but also their phase lag behavior. For the first type of QPO, the low energy photons (<5 keV) of both the 6 Hz QPO and its harmonic at 12 Hz lag the hard energy photons (>5 keV) by as much as 1.3 radian. The phase lags of the second type of QPO are more complex. The soft photons (<5 keV) of the 3 and the 12 Hz QPOs lag the hard photons (>5 keV) by as much as 1.0 radian. However, the soft photons of the 6 Hz QPO precede the hard ones by as much as 0.6 radian. This means that different harmonics of this type of QPO have different signs for their phase lags. This unusual behavior is hard to explain when the lags are due to light-travel-time differences between the photons at different energies, e.g., in a Comptonizing region surrounding the area where the QPOs are formed.
description: Accepted for publication in ApJ Letters, 29 September 1999
Regular cylindrical algebraic decomposition
Creators: name: Davenport, J. H.
name: Locatelli, A. F.
name: Sankaran, G. K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: Symbolic Computation (cs.SC)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 14P10, 57N99, 68W30

description: We show that a strong well-based cylindrical algebraic decomposition P of a bounded semi-algebraic set is a regular cell decomposition, in any dimension and independently of the method by which P is constructed. Being well-based is a global condition on P that holds for the output of many widely used algorithms. We also show the same for S of dimension at most 3 and P a strong cylindrical algebraic decomposition that is locally boundary simply connected: this is a purely local extra condition.
Experimental Validation of a 3GPP Compliant 5G-Based Positioning System
Creators: name: Dhungel, Sarik
name: Duggal, Gaurav
name: Ron, Dara
name: Tripathi, Nishith
name: Buehrer, R. Michael
name: Reed, Jeffrey H.
name: Shah, Vijay K
Publisher: name: arXiv
Year: 2024
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The advent of 5G positioning techniques by 3GPP has unlocked possibilities for applications in public safety, vehicular systems, and location-based services. However, these applications demand accurate and reliable positioning performance, which has led to the proposal of newer positioning techniques. To further advance the research on these techniques, in this paper, we develop a 3GPP-compliant 5G positioning testbed, incorporating gNodeBs (gNBs) and User Equipment (UE). The testbed uses New Radio (NR) Positioning Reference Signals (PRS) transmitted by the gNB to generate Time of Arrival (TOA) estimates at the UE. We mathematically model the inter-gNB and UE-gNB time offsets affecting the TOA estimates and examine their impact on positioning performance. Additionally, we propose a calibration method for estimating these time offsets. Furthermore, we investigate the environmental impact on the TOA estimates. Our findings are based on our mathematical model and supported by experimental results.
description: 8 pages, 9 figures, Accepted in ACM Wintech 2024
Wopper, Version 1.1: A Monte Carlo Event Generator for Four Fermion Production at LEP-II and Beyond
Creators: name: Anlauf, Harald
name: Dahmen, Hans D.
name: Himmler, Angelika
name: Manakos, Panagiotis
name: Mannel, Thomas
name: Ohl, Thorsten
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on the status of the Monte Carlo event generator WOPPER. Version 1.1 of WOPPER describes four fermion production at LEP-II and beyond with leading logarithmic radiative corrections in the double W pole approximation. These approximations are appropriate for almost all practical purposes, but the inclusion of these finite width effects and radiative corrections is nevertheless indispensable for LEP-II physics.
description: 6 pages LaTeX (Elsevier proceedings style) with 7 PostScript figures, (Contribution to the Teupitz Workshop 1994), IKDA 94/9
The Effect of a Workfare Programme on Psychological Wellbeing in India
Creators: name: Tsaneva, Magda
name: MAGDA TSANEVA
name: Uttara Balakrishnan
name: UTTARA BALAKRISHNAN
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Little is known about the effect of poverty alleviation programmes on mental health. In this paper we use variation in district implementation dates and location of residence to examine the short-run effect of the National Rural Employment Guarantee Scheme in India on psychological wellbeing. We find that in the first year of the programme, women in recipient districts were less likely to experience depression symptoms. The effects of the programme on men’s mental health, on the other hand, are generally not statistically significant and are not robust to different specifications. We provide suggestive evidence that one mechanism through which the programme could have affected women, at least in the short-run, was providing them with greater economic security and independence.
Energy distributions of an ion in a radiofrequency trap immersed in a buffer gas under the influence of additional external forces
Creators: name: Rouse, I.
name: Willitsch, S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: An ion held in a radiofrequency trap interacting with a uniform buffer gas of neutral atoms develops a steady-state energy distribution characterised by a power-law tail at high energies instead of the exponential decay characteristic of thermal equilibrium. We have previously shown that the Tsallis statistics frequently used as an empirical model for this distribution is a good approximation when the ion is heated due to a combination of micromotion interruption and exchange of kinetic energy with the buffer gas [I. Rouse and S. Willitsch, Phys. Rev. Lett. 118, 143401 (2017)]. Here, we extend our treatment to include the heating due to additional motion of the ion caused by external forces, including the "excess micromotion" induced by uniform electric fields and rf phase offsets. We show that this also leads to a Tsallis distribution with a potentially different power-law exponent from that observed in the absence of this additional forced motion, with the difference increasing as the ratio of the mass of the neutral atoms to that of the ion decreases. Our results indicate that unless the excess micromotion is minimised to a very high degree, then even a system with very light neutrals and a heavy ion does not exhibit a thermal distribution.
description: 16 pages, 9 figures
Polarization Rotation Effects due to Parity Violation in Atoms
Creators: name: Botz, G. W.
name: Bruß, D.
name: Nachtmann, O.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a study of parity (P) violating polarization rotations of atoms in external electric fields. Five different types of rotations are identified and the consequences of time reversal invariance (T) are discussed. The role played by Zeldovich's electric dipole moment of unstable states is elucidated. To calculate the effects, we use the standard model of elementary particle physics where P violation in atoms is due to the exchange of the Z boson between the quarks in the nucleus and the atomic electrons. We consider in detail hydrogen-like systems in $n=2$ states, especially $^1_1$H, $^4_2$He$^+$, and $^{12}_6$C$^{5+}$. We discuss ways to obtain in some cases large enhancement factors for the P-violating polarization rotations and show that e.g. for $^1_1$H one could in principle observe rotations as large as a few percent, where for a statistically significant result one would need a total of $10^{15}$ polarized atoms. We point out that some of our P-violating polarization rotations are very sensitive to the nuclear spin-dependent part of the P-violating Hamiltonian which receives a contribution from the polarized strange quark density in polarized nuclei.
description: 71 pages, LaTeX (uses rotating.sty), 27 pages with figures (compressed ps-file, uuencoded) appended at the end
Weak lensing analysis of MS 1008-1224 with the VLT
Creators: name: Athreya, R.
name: Mellier, Y.
name: Van Waerbeke, L.
name: Fort, B.
name: Pello, R.
name: Dantel-Fort, M.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a gravitational lensing analysis of the cluster of galaxies MS 1008-1224 (z=0.30), based on very deep observations obtained using the VLT with FORS and ISAAC during the science verification phase. We reconstructed the projected mass distribution from B,V,R,I bands using two different methods independently. The mass maps are remarkably similar, which confirm that the PSF correction worked well. The ISAAC and FORS data were combined to measure the photometric redshifts and constrain the redshift distribution of the lensed sources. The total mass inferred from weak shear is 2.3 10^{14} h^{-1} Mo on large scales, in agreement with the X-ray mass. The measured mass profile is well fit by both Navarro, Frenk and White and isothermal sphere with core radius models although the NFW is slightly better. In the inner regions, the lensing mass is about 2 times higher than the X-ray mass, which supports the view that complex physical processes in the innermost parts of clusters are responsible for the X-ray/lensing mass discrepancy. The central part of the cluster is composed of two mass peaks whose the center of mass is 15 arcsecond north of the cD galaxy. This provides an explanation for the 15 arcsecond offset between the cD and the center of the X-ray map reported elsewhere. The optical, X-ray and the mass distributions show that MS 1008-1224 is composed of many subsystems which are probably undergoing a merger. MS 1008-1224 shows a remarkable case of cluster-cluster lensing. The photometric redshifts show an excess of galaxies located 30 arcseconds south-west of the cD galaxy at a redshift of about 0.9 which is lensed by MS 1008-1224. These results show the importance of getting BVRIJK images silmultenously. The VLT is a unique tool to provide such datasets.
description: 22 pages, submitted to A&A, paper with `big' figures available at ftp://ftp.cita.utoronto.ca/pub/waerbeke/ms1008paper/
title: ADCO, Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Cart. 31 (G 135), 549 folios, f. 0250
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Archives départementales de la Côte-d'Or, Cart. 31 (G 135), 549 folios, f. 0250, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Huitième cartulaire de Saint-Étienne de Dijon (1661-1667), Archives départementales de la Côte-d'Or, Cart. 31 (G 135), 549 folios, f. 0250, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
HST-NICMOS Color Transformations and Photometric Calibrations
Creators: name: Stephens, Andrew W.
name: Frogel, Jay A.
name: Ortolani, Sergio
name: Davies, Roger
name: Jablonka, Pascale
name: Renzini, Alvio
name: Rich, R. Michael
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper presents color transformations for HST NICMOS camera 2 observations to the ground-based CIT/CTIO photometric system, using observations of nineteen moderately bright, red stars in Baade's window in the color range 0.7 < (J-K) < 1.6. We estimate an extension of the transformation to 0.4 < (J-K) < 3.0 with five standards observed by STScI. Convolving near-IR spectra taken above the atmosphere with different filter transmission profiles, we simulate both NICMOS and ground-based photometry, obtaining results which are consistent with our transformation and its extension.
description: 12 pages with 3 figures, AAS LaTeX v4.0 macros, submitted to AJ
Gamma-Ray Bursts as a Probe of the Very High Redshift Universe
Creators: name: Lamb, Donald Q.
name: Reichart, Daniel E.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The recent evidence that the light curves and the spectra of the afterglows of GRB 970228 and GRB 980326 appear to contain a SN component, in addition to a relativistic shock wave component, provide direct clues that at least the long GRBs detected by BeppoSAX are a result of the collapse of massive stars. We show that, if this is indeed the case, GRBs and their afterglows provide a powerful probe of the very high redshift (VHR) (z > 5) universe. We first establish that GRBs and their afterglows are both detectable out to VHRs. We then show that one expects GRBs to occur out to at least z ~ 10 and possibly z \~ 15 - 20, redshifts that are far larger than those expected for the most distant quasars. This implies that there are large numbers of GRBs with peak photon number fluxes below the detection thresholds of BATSE and HETE-2, and even below the detection threshold of Swift. The mere detection of VHR GRBs would give us our first information about the earliest generations of stars. We show that GRBs and their afterglows can be used as beacons to locate core collapse SNe at redshifts z >> 1, and to study the properties of these SNe. We describe the expected properties of the absorption-line systems and the Ly-alpha forest in the spectra of GRB afterglows, and discuss various strategies for determining the redshifts of VHR GRBs. We then show how the absorption-line systems and the Ly-alpha forest visible in the spectra of GRB afterglows can be used to trace the evolution of metallicity in the universe, and to probe the large-scale structure of the universe at VHRs. Finally, we show how measurement of the Ly-alpha break in the spectra of GRB afterglows can be used to constrain, or possibly measure, the epoch at which re-ionization of the universe occurred, using the Gunn-Peterson test.
description: Accepted to the Astrophysical Journal, 40 pages, LaTeX
GUT effects in the soft supersymmetry breaking terms
Creators: name: Polonsky, Nir
name: Pomarol, Alex
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In minimal supergravity theories the soft supersymmetry breaking (SSB) parameters are universal (flavor blind) near the Planck scale. Nevertheless, one often assumes universality at the grand-unification scale $M_{G} \approx 10^{16}$ GeV instead, and corrections to the SSB parameters arising from their evolution between the Planck and GUT scales are neglected. We study these corrections and show that large splittings between the scalar mass parameters can be induced at $M_{G}$. These effects are model dependent and lead to significant uncertainties in the low-energy predictions of supersymmetric models, in their correlations and in the allowed parameter space.
description: 11 pages, UPR-0616T, LaTex + RevTex 3.0, uuencoded postscript file (including 3 figures) is attached. Also available via anonymous ftp from dept.physics.upenn.edu (dir pub)
Relativistic Low Angular Momentum Accretion: Long Time Evolution of Hydrodynamical Inviscid Flows
Creators: name: Mach, Patryk
name: Piróg, Michał
name: Font, José A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate relativistic low angular momentum accretion of inviscid perfect fluid onto a Schwarzschild black hole. The simulations are performed with a general-relativistic, high-resolution (second-order), shock-capturing, hydrodynamical numerical code. We use horizon-penetrating Eddington-Finkelstein coordinates to remove inaccuracies in regions of strong gravity near the black hole horizon and show the expected convergence of the code with the Michel solution and stationary Fishbone-Moncrief toroids. We recover, in the framework of relativistic hydrodynamics, the qualitative behavior known from previous Newtonian studies that used a Bondi background flow in a pseudo-relativistic gravitational potential with a latitude-dependent angular momentum at the outer boundary. Our models exhibit characteristic "turbulent" behavior and the attained accretion rates are lower than those of the Bondi-Michel radial flow. For sufficiently low values of the asymptotic sound speed, geometrically thick tori form in the equatorial plane surrounding the black hole horizon while accretion takes place mainly through the poles.
description: 28 pages, 17 figures, to appear in Class. Quantum Grav
Magnetic defects in an unbalanced mixture of two Bose-Einstein condensates
Creators: name: Gallemí, A.
name: Pitaevskii, L. P.
name: Stringari, S.
name: Recati, A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: When the spectrum of magnetic excitations of a quantum mixture is much softer than the density spectrum, the system becomes effectively incompressible and can host magnetic defects. These are characterized by the presence of a topological defect in one of the two species and by a local modification of the density in the second one, the total density being practically unaffected. For miscible mixtures interacting with equal intraspecies coupling constants the width of these magnetic defects is fixed by the difference between the intraspecies and interspecies coupling constants and becomes larger and larger as one approaches the demixing transition. When the density of the filling component decreases, the incompressibility condition breaks down and we predict the existence of a critical filling, below which all the atoms of the minority component remain bound in the core of the topological defect. Applications to the sodium case both in uniform and harmonically trapped configurations are considered and a protocol to produce experimentally these defects is discussed. The case of binary mixtures interacting with unequal intraspecies forces and experiencing buoyancy is also addressed.
description: 10 pages, 6 figures
CRITICISMS OF THE FUTURE AVAILABILITY IN SUSTAINABLE GENDER GOAL, ACCESS TO LAND AND NON-LAND UNDER THE POPULATIONS AND CLIMATE CHANGE
Creators: name: Kasun D Ramanayake R.A
Publisher: name: figshare
Year: 2018
Subjects: subject: 90601 Circuits and Systems
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper begins with the understanding that criticizes in one of the Sustainable development gender goal, “Undertake reforms to give women equal rights to economic resources, as well as access to ownership and control over land and other forms of property ” under the Populations growth and Climate Change. Because an increasing population generates a number of challenges for today and also in the future world. According to the results of World Population Prospect 2015, world population reached 7.3 billion as of mid-2015 and continually increasing to 11.2 billion in 2100, In the meanwhile world tempter anticipated to increase between 2.6 RCP and 8.6 RCP, therefore, world average sea level increase in between from 0.4m and 0.9 m in 2010 (IPCC,2014).as a reason world need to face negative demographical change send of this century. According to gender goals, UN wants to increase the women's new land access. but it generates the number of unsustainable results in future, because climate change and population growth affected to huge density and land ownership problems. Therefore in this paper criticized this Sustainable Development Goal and gender indicators, as same as discussed technological and sustainable suggestions under the Populations growth and Climate Change.
Observational Test of Environmental Effects on The Local Group Dwarf Spheroidal Galaxies
Creators: name: Tamura, Naoyuki
name: Hirashita, Hiroyuki
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, we examine whether tidal forces exerted by the Galaxy or M31 have an influence on the Local Group dwarf spheroidal galaxies (dSphs) which are their companions. We focus on the surface brightness profiles of the dSphs, especially their core radii because it is suggested based on the numerical simulations that tidal disturbance can make core radii extended. We examine the correlation for the dSphs between the distances from their parent galaxy (the Galaxy or M31) and the compactnesses of their surface brightness profiles by using a parameter ``C'' defined newly in this paper. Consequently, we find no significant correlation. We make some remarks on the origin of this result by considering three possible scenarios; tidal picture, dark matter picture, and heterogeneity of the group of dSphs, each of which has been often discussed to understand fundamental properties and formation processes of dSphs.
description: 14 pages LaTeX, 2 PostScript figures, to appear in ApJ Letters
Heavy quark limit in the model with confined light quarks and infrared heavy quark propagators
Creators: name: Ivanov, M. A.
name: Mizutani, T.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have studied the weak decay constants and the Isgur-Wise form factor of the B and D mesons in the heavy quark limit, by employing a relativistic quark confinement model. It is an attempt to improve our previous work within the same line of thinking, but by incorporating a couple of novel aspects. First, the infrared behavior of the heavy quark is considered by modifying its conventional propagator in terms of a single parameter $ν$. Second, the mass difference of the heavy meson and heavy quark: $E=m_H-M_Q$ has been included. It is found that the weak decay constants depend strongly on the mass difference E with a relatively mild $ν$ dependence. As for the Isgur-Wise function it is controlled more sensitively by the infrared parameter $ν$, leading to its suppression at maximum meson recoil.
Evolution of Multi-mass Globular Clusters in Galactic Tidal Field with the Effects of Velocity Anisotropy
Creators: name: Takahashi, K.
name: Lee, H. M.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the evolution of globular clusters with mass spectra under the influence of the steady Galactic tidal field, including the effects of velocity anisotropy. Similar to single-mass models, velocity anisotropy develops as the cluster evolves, but the degree of anisotropy is much smaller than isolated clusters. Except for very early epochs of the cluster evolution, nearly all mass components become tangentially anisotropic at the outer parts. We have compared our results with multi-mass, King-Michie models. The isotropic King model better fits to the Fokker-Planck results because of tangential anisotropy. However, it is almost impossible to fit the computed density profiles to the multi-mass King models for all mass components. Thus if one attempts to derive global mass function based on the observed mass function in limited radial range using multi-mass King models, one may get somewhat erratic results, especially for low mass stars. We have examined how the mass function changes in time. Specifically, we find that the power-law index of the mass function decreases monotonically with the total mass of the cluster. This appears to be consistent with the behaviour of the observed slopes of mass functions for a limited number of clusters, although it is premature to compare quantitatively because there are other mechanisms in contributing the evaporation of stars from the clusters. The projected velocity profiles for anisotropic models with the apocenter criterion for evaporation show significant flattening toward the tidal radius compared to isotropic model or anisotropic model with the energy criterion. Such a behaviour of velocity profile appears to be consistent with the observed profiles of collapsed cluster M15.
description: 13 pages including 18 figures in mn style
Decays of $\ell=1$ Baryons --- Quark Model versus Large-$N_c$
Creators: name: Carone, Christopher D.
name: Georgi, Howard
name: Kaplan, Lev
name: Morin, David
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study nonleptonic decays of the orbitally excited, \su6 \rep{70}-plet baryons in order to test the hypothesis that the successes of the nonrelativistic quark model have a natural explanation in the large-$N_c$ limit of QCD. By working in a Hartree approximation, we isolate a specific set of operators that contribute to the observed s- and d-wave decays in leading order in $1/N_c$. We fit our results to the current experimental decay data, and make predictions for a number of allowed but unobserved modes. Our tentative conclusion is that there is more to the nonrelativistic quark model of baryons than large-$N_c$.
description: LaTeX 49pp. (38 pp. landscape), PicTex, PrePicTex, PostPicTex required for 3 figures, Harvard Preprint HUTP-94/A008. (Two additional operators are included, but conclusions are unchanged.)
Kinematics of ionized and molecular hydrogen in the core of M100
Creators: name: Knapen, J. H.
name: Shlosman, I.
name: Heller, C. H.
name: Rand, R. J.
name: Beckman, J. E.
name: Rozas, M.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high angular and velocity resolution two-dimensional kinematic observations in the spectral lines of H alpha and CO J=1-0 of the circumnuclear starburst region in the barred spiral galaxy M100, and compare them with kinematics derived from our previously published numerical modeling. The H alpha data, fully sampled and at sub-arcsecond resolution, show a rotation curve that is rapidly rising in the central ~140 pc, and stays roughly constant, at the main disk value, further out. Non-circular motions are studied from the H alpha and CO data by detailed consideration of the velocity fields, residual velocity fields after subtraction of the rotation curve, and sets of position-velocity diagrams. These motions are interpreted as the kinematic signatures of gas streaming along the inner part of the bar, and of density wave streaming motions across a two-armed mini-spiral. Comparison with a two-dimensional velocity field and rotation curve derived from our 1995 dynamical model shows good qualitative and quantitative agreement for the circular and non-circular kinematic components. Both morphology and kinematics of this region require the presence of a double inner Lindblad Resonance in order to explain the observed twisting of the near-infrared isophotes and the gas velocity field. These are compatible with the presence of a global density wave driven by the moderately strong stellar bar in this galaxy. We review recent observational and modeling results on the circumnuclear region in M100, and discuss the implications for bar structure and gas dynamics in the core of M100 and other disk galaxies.
description: 24 pages, includes 15 postscript figures. Accepted, ApJ (Vol. 528 #1, Jan 1, 2000 issue). Higher quality figures on ftp://star.herts.ac.uk/pub/Knapen/m100/
Correlation Functions of the Abell, APM, and X-ray Clusters of Galaxies
Creators: name: Lee, Sungho
name: Park, Changbom
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the correlation functions of the optically selected clusters of galaxies in the Abell and the APM catalogs, and of the X-ray clusters in the X-ray-Brightest Abell-type Clusters of galaxies (XBACs) catalog and the Brightest Clusters Sample (BCS). The same analysis method and the same method of characterizing the resulting correlation functions are applied to all observational samples. We have found that the amplitude of the correlation function of the APM clusters is much higher than what has been previously claimed, in particular for richer subsamples. The correlation length of the APM clusters with the richness R >= 70 (as defined by the APM team) is found to be r_0 = 25.4(+3.1,-3.0) h^(-1)Mpc. The amplitude of correlation function is about 2.4 times higher than that of Croft et al. (1997). The correlation lengths of the Abell clusters with the richness class RC >= 0 and 1 are measured to be r_0 = 17.4(+1.2,-1.1) and 21.0(+2.8,-2.8) h^(-1)Mpc, respectively, which is consistent with our results for the APM sample at the similar level of richness. The richness dependence of cluster correlations is found to be r_0 = 0.40*d_c + 3.2 where d_c is the mean intercluster separation. This is identical in slope with the Bahcall & West (1992)'s estimate, but is inconsistent with the weak dependence of Croft et al. (1997). The X-ray bright Abell clusters in the XBACs catalog and the X-ray selected clusters in the BCS catalog show strong clustering. The correlation length of the XBACs clusters with L_x >= 0.65*10^44 h^(-2)erg/s is 30.3(+8.2,-6.5) h^(-1)Mpc, and that of the BCS clusters with L_x >= 0.70*10^44 h^(-2)erg/s is 30.2(+9.8,-8.9) h^(-1)Mpc. The clustering strength of the X-ray clusters is much weaker than what is expected from the optical clusters.
description: 10 pages, 4 figures, references for more recent works are added
Studies of Strong Electroweak Symmetry Breaking at Photon Colliders
Creators: name: Cheung, Kingman
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It has recently been shown that the studies of strongly-interacting electroweak symmetry breaking (EWSB) at photon colliders, via photon splitting into $W$ pair followed by longitudinal $W$-boson scattering, could be possible. Here we present a signal-background analysis for the scattering channels $W^+_L W^-_L \to Z_L Z_L$ and $W^+_L W^-_L \to W^+_L W^-_L$ with background coming from the standard model (SM) production of $γγ\to WW ZZ$ and $WWWW$, respectively. We illustrate the analysis using the SM with a heavy Higgs boson $(m_H\approx 1$ TeV) to represent a typical strongly-interacting EWSB model and the SM with a light Higgs boson ($m_H\approx 0.1$ TeV) to represent the background. We come up with a set of kinematic acceptance to enhance the signal-to-background ratio. Extension of the kinematic acceptance to other strongly-interacting EWSB models is then trivial, and the signal cross sections for various EWSB models are calculated. We found that it is very feasible to probe the EWSB sector at a photon collider of center-of-mass energy of 2 TeV with a luminosity of just 10~fb$^{-1}$.
description: 22 pages, 7 figures (not included but available upon request), standard LaTeX, Report number NUHEP-TH-94-13
Multi-Frequency Study of the B3-VLA Sample II. The Database
Creators: name: Vigotti, M.
name: Gregorini, L.
name: Klein, U.
name: Mack, K. -H.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present total flux densities of 1049 radio sources in the frequency range from 151 MHz to 10.6 GHz. These sources belong to the B3-VLA sample, which is complete down to 100 mJy at 408 MHz. The data constitute a homogeneous spectral database for a large sample of radio sources, 50 times fainter than the 3C catalogue, and will be used to perform a spectral ageing analysis, which is one of the critical points in understanding the physics and evolution of extragalactic radio sources.
description: 14 pages, 3 figures, accepted for publication in Astronomy & Astrophysics Supplement Series, gzipped postscript file also available at http://multivac.jb.man.ac.uk:8000/ceres/papers/papers.html or http://gladia.astro.rug.nl:8000/ceres/papers/papers.html
From continuous to discontinuous transitions in social diffusion
Creators: name: Tuzón, Paula
name: Fernández-Gracia, Juan
name: Eguíluz, Víctor M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Models of social diffusion reflect processes of how new products, ideas or behaviors are adopted in a population. These models typically lead to a continuous or a discontinuous phase transition of the number of adopters as a function of a control parameter. We explore a simple model of social adoption where the agents can be in two states, either adopters or non-adopters, and can switch between these two states interacting with other agents through a network. The probability of an agent to switch from non-adopter to adopter depends on the number of adopters in her network neighborhood, the adoption threshold $T$ and the adoption coefficient $a$, two parameters defining a Hill function. In contrast, the transition from adopter to non-adopter is spontaneous at a certain rate $μ$. In a mean-field approach, we derive the governing ordinary differential equations and show that the nature of the transition between the global non-adoption and global adoption regimes depends mostly on the balance between the probability to adopt with one and two adopters. The transition changes from continuous, via a transcritical bifurcation, to discontinuous, via a combination of a saddle-node and a transcritical bifurcation, through a supercritical pitchfork bifurcation. We characterize the full parameter space. Finally, we compare our analytical results with Montecarlo simulations on annealed and quenched degree regular networks, showing a better agreement for the annealed case. Our results show how a simple model is able to capture two seemingly very different types of transitions, i.e., continuous and discontinuous and thus unifies underlying dynamics for different systems. Furthermore the form of the adoption probability used here is based on empirical measurements.
description: 7 pages, 3 figures
Merging Rate of Dark Matter Halos: Evolution and Dependence on Environment
Creators: name: Gottloeber, Stefan
name: Klypin, Anatoly
name: Kravtsov, Andrey V.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the impact of the cosmological environment on the evolution of dark matter halos using a high-resolution simulation within a spatially flat LCDM cosmology.
description: 4 pages, 1 figure, contribution to the Morphology Conference in Johannesburg, September 1999
Layer specific observation of slow thermal equilibration in ultrathin metallic nanostructures by femtosecond x-ray diffraction
Creators: name: Pudell, J.
name: Maznev, A.
name: Herzog, M.
name: Kronseder, M.
name: Back, C.
name: Malinowski, G.
name: von Reppert, A.
name: Bargheer, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Ultrafast heat transport in nanoscale metal multilayers is of great interest in the context of optically-induced demagnetization, remagnetization and switching. We investigate the structural response and the energy flow in the ultrathin double-layer system Gold (Au) on ferromagnetic Nickel (Ni) by ultrafast x-ray diffraction (UXRD). The penetration depth of light exceeds the bilayer thickness, preventing unambiguous layer-specific information from optical probes. Even though the excitation pulse is incident from the Au side, we observe a very rapid heating of the Ni lattice, whereas the Au lattice initially remains cold; the subsequent heat transfer from Ni to the Au lattice is found to be two orders of magnitude slower than predicted by the conventional heat equation and much slower than electron-phonon coupling times in Au. Both observations are independent of the excitation wavelength, although for the same fluence 400nm light excites electrons in Au ten times more than 800nm light. Simple model calculations show that the different specific heat of electrons in Ni and Au as well as the different electron-phonon coupling rapidly force the majority of thermal energy into the Ni lattice. Our results show that femtosecond UXRD provides an experimental account of heat transport over single digit nanometer distances as the thermal framework for ultrafast spin dynamics.
The Effect of a Workfare Programme on Psychological Wellbeing in India
Creators: name: Tsaneva, Magda
name: Uttara Balakrishnan
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Little is known about the effect of poverty alleviation programmes on mental health. In this paper we use variation in district implementation dates and location of residence to examine the short-run effect of the National Rural Employment Guarantee Scheme in India on psychological wellbeing. We find that in the first year of the programme, women in recipient districts were less likely to experience depression symptoms. The effects of the programme on men’s mental health, on the other hand, are generally not statistically significant and are not robust to different specifications. We provide suggestive evidence that one mechanism through which the programme could have affected women, at least in the short-run, was providing them with greater economic security and independence.
Quantum Chromodynamics and Multiplicity Distributions
Creators: name: Dremin, I. M.
Publisher: name: arXiv
Year: 1994
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quantum chromodymamics (QCD) approach to the problem of multiplicity distributions in high energy particle collisions is described. The solutions of QCD equations for generating functions of the multiplicity distributions in gluon and quark jets are presented for both fixed and running coupling constants. The newly found characteristics very sensitive to distribution shapes is discussed. The predictions are confronted to experimental data. Evolution of the multiplicity distributions with decreasing phase space windows is considered and discussed in connection to the notions of intermittency and fractality. Some other QCD effects are briefly described.
description: Submitted to Physics - Uspekhi Latex document, 60 pages. Preprint number FIAN TD-6, 1994
Energetics and Luminosity Function of Gamma-ray Bursts
Creators: name: Kumar, Pawan
name: Piran, Tsvi
Publisher: name: arXiv
Year: 1999
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma-ray bursts are believed to be some catastrophic event in which material is ejected at a relativistic velocity, and internal collisions within this ejecta produce the observed $γ$-ray flash. The angular size of a causally connected region within a relativistic flow is of the order the angular width of the relativistic beaming, $γ^{-1}$. Thus, different observers along different lines of sights could see drastically different fluxes from the same burst. Specifically, we propose that the most energetic bursts correspond to exceptionally bright spots along the line of sight on colliding shells, and do not represent much larger energy release in the explosion. We calculate the distribution function of the observed fluence for random angular-fluctuation of ejecta. We find that the width of the distribution function for the observed fluence is about two orders of magnitude if the number of shells ejected along different lines of sight is ten or less. The distribution function becomes narrower if number of shells along typical lines of sight increases. The analysis of the $γ$-ray fluence and afterglow emissions for GRBs with known redshifts provides support for our model i.e. the large width of GRB luminosity function is not due to a large spread in the energy release but instead is due to large angular fluctuations in ejected material. We outline several observational tests of this model. In particular, we predict little correlation between the $γ$-ray fluence and the afterglow emission as in fact is observed. We predict that the early (minutes to hours) afterglow would depict large temporal fluctuations whose amplitude decreases with time. Finally we predict that there should be many weak bursts with about average afterglow luminosity in this scenario.
description: Latex, 16 pages
Toward a better understanding of the interaction between somatostatin receptor 2 and its ligands: a structural characterization study using molecular dynamics and conceptual density functional theory
Creators: name: Santhosh Kumar Nagarajan
name: Sathya Babu
name: Honglae Sohn
name: Panneer Devaraju
name: Thirumurthy Madhavan
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Computational Biology

description: This study is a part of the extensive research intending to provide the structural insights on somatostatin and its receptor. Herein, we have studied the structural complexity involved in the binding of somatostatin receptor 2 (SSTR2) with its agonists and antagonist. A 3D QSAR study based on comparative molecular field analysis and comparative molecular similarity analysis (CoMSIA) discerned that a SSTR2 ligand with electronegative, less-bulkier, and hydrogen atom donating/accepting substitutions is important for their biological activity. A conceptual density functional theory (DFT) study was followed to study the chemical behavior of the ligands based on the molecular descriptors derived using the Fukui’s molecular orbital theory. We have performed molecular dynamics simulations of receptor–ligand complexes for 100 ns to analyze the dynamic stability of the backbone Cα atoms of the receptor and strength and approachability of the receptor–ligand complex. The findings of this study could be efficacious in the further studies understanding intricate structural features of the somatostatin receptors and in discovering novel subtype-specific ligands with higher affinity. Communicated by Ramaswamy H. Sarma
Supplementary document for The broadband optical response and ultrafast all-optical modulation of Nb4C3 - 6435447.pdf
Creators: name: Hu, Yibiao
name: YANG, ZHAN
name: Zhang, Tianju
name: Chen, Chenduan
name: Wang, Zixin
name: Dong, Ningning
name: Wang, Jun
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supporting Information