cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A mechanochemical model for the simulation of molecules and molecular crystals under hydrostatic pressure
Creators: name: Stauch, Tim
Publisher: name: Universität Bremen
Year: 2020
Subjects: subject: Density Functional Theory
subject: Electronic structure methods
subject: Molecular geometry
subject: Computational methods
subject: Dimerization
subject: Hydrostatics
subject: 540

description: A novel mechanochemical method for the simulation of molecules and molecular crystals under hydrostatic pressure, the eXtended Hydrostatic Compression Force Field (X-HCFF) approach, is introduced. In contrast to comparable methods, the desired pressure can be adjusted non-iteratively and molecules of general shape retain chemically reasonable geometries even at high pressure. The implementation of the X-HCFF approach is straightforward, and the computational cost is practically the same as for regular geometry optimization. Pressure can be applied by using any desired electronic structure method for which a nuclear gradient is available. The results of the X-HCFF for pressure-dependent intramolecular structural changes in the investigated molecules and molecular crystals as well as a simple pressure-induced dimerization reaction are chemically intuitive and fall within the range of other established computational methods. Experimental spectroscopic data of a molecular crystal under pressure are reproduced accurately.
A Quantum Like Interpretation and Solution of Einstein, Podolsky, and Rosen Paradox in Quantum Mechanics
Creators: name: Conte, Elio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the Einstein, Podolsky, and Rosen paradox as it was formulated by Asher Peres in 1992 [4]. On this basis we realize an algebraic quantum like elaboration showing that in this formulation the paradox may be still interpreted and solved.
description: 9 pages
title: ADCO, Cartulaire de Cîteaux dit Cartularium Vetus (milieu XIIIe siècle) et Notices du XIIe siècle, Cart. 169 (11 H 63), f. 0062v
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/2011
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi

description: Cartulaire de Cîteaux dit Cartularium Vetus (milieu XIIIe siècle) et Notices du XIIe siècle, Archives départementales de la Côte-d'Or, Cart. 169 (11 H 63), f. 0062v, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Cîteaux dit Cartularium Vetus (milieu XIIIe siècle) et Notices du XIIe siècle, Archives départementales de la Côte-d'Or, Cart. 169 (11 H 63), f. 0062v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Dynamics of Strongly Twisted Relativistic Magnetospheres
Creators: name: Parfrey, Kyle
name: Beloborodov, Andrei M.
name: Hui, Lam
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Magnetar magnetospheres are believed to be strongly twisted, due to shearing of the stellar crust by internal magnetic stresses. We present time-dependent axisymmetric simulations showing in detail the evolution of relativistic force-free magnetospheres subjected to slow twisting through large angles. When the twist amplitude is small, the magnetosphere moves quasi-statically through a sequence of equilibria of increasing free energy. At some twist amplitude the magnetosphere becomes tearing-mode unstable to forming a resistive current sheet, initiating large-scale magnetic reconnection in which a significant fraction of the magnetic free energy can be dissipated. This "critical" twist angle is insensitive to the resistive length scale. Rapid shearing temporarily stabilizes the magnetosphere beyond the critical angle, allowing the magnetosphere of a rapidly differentially rotating star to store, and dissipate, more free energy. In addition to these effects, shearing the surface of a rotating star increases the spindown torque applied to the star. If shearing is much slower than rotation, the resulting spikes in spindown rate can occur on timescales anywhere from the long twisting timescale to the stellar spin period or shorter, depending both on the stellar shear distribution and the existing distribution of magnetospheric twists. A model in which energy is stored in the magnetosphere, and released by a magnetospheric instability, therefore predicts large changes in the measured spindown rate before SGR giant flares.
description: 28 pages, 23 figures, published in ApJ
Mechanical Switching of Aromaticity and Homoaromaticity in Molecular Optical Force Sensors for Polymers
Creators: name: Stauch, Tim
Publisher: name: Wiley
Year: 2018
Subjects: subject: Density functional calculations
subject: Mechanochemistry
subject: Optical force sensors
subject: Polymer chemistry
subject: Quantum Chemistry
subject: 540

description: The sensing of mechanical stress in polymers is indispensable for investigating the origin and propagation of cracks that lead to material failure and for designing mechanically responsive polymers. Here the unique approaches of using the force-induced switching of aromaticity and homoaromaticity in molecular optical force sensors for the real-time measurement of mechanical forces acting in stretched polymers are suggested. The mechanical switching of aromaticity in Dewar benzene is an irreversible event, whereas the degree of π-orbital overlap in homoaromatic compounds like homotropylium can be adjusted progressively over a wide range of forces. Using computational methods, it is demonstrated that both approaches lead to significant changes in the visible part of the UV/Vis spectra of the force sensors upon application of weak forces (pN–nN). Polymers that incorporate such molecular force sensors therefore change their color well before material failure occurs.
Spectral Energy Distributions of High Mass Proto Stellar Objects - Evidence for High Accretion Rates
Creators: name: Fazal, F. M.
name: Sridharan, T. K.
name: Qiu, K.
name: Robitaille, T. P.
name: Whitney, B. A.
name: Zhang, Q.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The spectral energy distributions (SEDs), spanning the mid-infrared to millimeter wavelengths, of a sample of 13 high-mass protostellar objects (HMPOs) were studied using a large archive of 2-D axisymmetric radiative transfer models. Measurements from the Spitzer GLIMPSE and MIPSGAL surveys and the MSX survey were used in addition to our own surveys at millimeter and submillimeter wavelengths to construct the SEDs, which were then fit to the archive of models. These models assumed that stars of all masses form via accretion and allowed us to make estimates for the masses, luminosities and envelope accretion rates for the HMPOs. The models fit the observed SEDs well. The implied envelope accretion rates are high, $\approx 10^{-2.5} \msun/yr$, consistent with the accretion-based scenario of massive star formation. With the fitted accretion rates and with mass estimates of up to $\sim 20 \msun$ for these objects, it appears plausible that stars with stellar masses $M_{\ast} > 20 \msun$ can form via accretion.
description: 10 pages; 3 figures; 3 tables
Discretely self-similar solutions to the Navier-Stokes equations with data in $L^2_{\mathrm{loc}}$ satisfying the local energy inequality
Creators: name: Bradshaw, Zachary
name: Tsai, Tai-Peng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Chae and Wolf recently constructed discretely self-similar solutions to the Navier-Stokes equations for any discretely self similar data in $L^2_{\mathrm{loc}}$. Their solutions are in the class of local Leray solutions with projected pressure, and satisfy the "local energy inequality with projected pressure". In this note, for the same class of initial data, we construct discretely self-similar suitable weak solutions to the Navier-Stokes equations that satisfy the classical local energy inequality of Scheffer and Caffarelli-Kohn-Nirenberg. We also obtain an explicit formula for the pressure in terms of the velocity. Our argument involves a new purely local energy estimate for discretely self-similar solutions with data in $L^2_{\mathrm{loc}}$ and an approximation of divergence free, discretely self-similar vector fields in $L^2_{\mathrm{loc}}$ by divergence free, discretely self-similar elements of $L^3_w$.
On the Average Number of Maxima in a set of Vectors and Applications
Creators: name: J. L. Bentley
name: H. T. Kung
name: M.  Schkolnick
name: C. D. Thompson
Publisher: name: Carnegie Mellon University
Year: 1998
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: A maximal vector of a set is one which is not less than any other vector in all components. We derive a recurrence relation for computing the average number of maximal vectors in a set of n vectors in d-space under the assumption that all (n!)d relative orderings are equally probable. Solving the recurrence shows that the average number of maxima is 0((ln n)d-1) We use this result to construct an algorithm for finding all the maxima that has expected running time linear in n (for sets of vectors drawn under our assumptions.) For a given set of random points, the result in also used to derive an upper bound on the expected number of points from the set which are on the boundary of the convex hull of the set.
Wilson Lines and Entanglement Entropy in Higher Spin Gravity
Creators: name: Ammon, Martin
name: Castro, Alejandra
name: Iqbal, Nabil
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Holographic entanglement entropy provides a direct connection between classical geometry and quantum entanglement; however the usual prescription does not apply to theories of higher spin gravity, where standard notions of geometry are no longer gauge invariant. We present a proposal for the holographic computation of entanglement entropy in field theories dual to higher spin theories of gravity in AdS3. These theories have a Chern-Simons description, and our proposal involves a Wilson line in an infinite-dimensional representation of the bulk gauge group. In the case of spin-2 gravity such Wilson lines are the natural coupling of a heavy point particle to gravity and so are equivalent to the usual prescription of Ryu and Takayanagi. For higher spin gravity they provide a natural generalization of these ideas. We work out spin-3 gravity in detail, showing that our proposal recovers many expected results and computes thermal entropies of black holes with higher spin charge, finding agreement with previous expressions in the literature. We encounter some peculiarities in the case of non-unitary RG flow backgrounds and outline future generalizations.
description: 52 pages + appendices, 5 figures; v2: references added, expanded discussion in Appendix C; v3: minor typos corrected, accepted version JHEP; v4: minor typos corrected
Nitrile‐Substituted 2‐(Oxazolinyl)‐Phenols: Minimalistic Excited‐ State Intramolecular Proton Transfer (ESIPT)‐Based Fluorophores
Creators: name: Göbel, Dominik
name: Duvinage, Daniel
name: Stauch, Tim
name: Nachtsheim, Boris Johannes
Publisher: name: Royal Society of Chemistry
Year: 2020
Subjects: subject: Excited-State Intramolecular Proton Transfer (ESIPT)
subject: Fluorophores
subject: Time-dependent density functional theory (TDDFT)
subject: Emission mapping
subject: Crystal structure analysis
subject: 2-(oxazolinyl)-phenols
subject: 540

description: Herein, we present minimalistic single-benzene, excited-state intramolecular proton transfer (ESIPT)-based fluorophores as powerful solid-state emitters. The very simple synthesis gave access to all four regioisomers of nitrile-substituted 2-(oxazolinyl)-phenols (MW = 216.1). In respect of their emission properties they can be divided into aggregation-induced emission enhancement (AIEE) luminophores (1-CN and 2-CN), dual state emission (DSE) emitters (3-CN) and aggregation-caused quenching (ACQ) fluorophores (4-CN). Remarkably, with compound 1-CN we discovered a minimalistic ESIPT-based fluorophore with extremely high quantum yield in the solid state ΦF = 87.3% at λem = 491 nm. Furthermore, quantum yields in solution were determined up to ΦF = 63.0%, combined with Stokes shifts up till 11.310 cm−1. Temperature dependent emission mapping, crystal structure analysis and time-dependent density functional theory (TDDFT) calculations gave deep insight into the origin of the emission properties.
Heating Through Phonon Excitation Implied by Collapse Models
Creators: name: Adler, Stephen L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We calculate the rate of heating through phonon excitation implied by the noise postulated in mass-proportional-coupled collapse models, for a general noise power spectrum. For white noise with reduction rate $λ$, the phonon heating rate reduces to the standard formula, but for non-white noise with power spectrum $λ(ω)$, the rate $λ$ is replaced by $λ_{\rm eff}=\frac{2}{3 π^{3/2}} \int d^3w e^{-\vec w^2} \vec w^2 λ(ω_L(\vec w/r_c))$, with $ω_L(\vec q)$ the longitudinal acoustic phonon frequency as a function of wave number $\vec q$, and with $r_C$ the noise correlation length. Hence if the noise power spectrum is cut off below $ω_L(|\vec q| \sim r_c^{-1})$, the heating rate is sharply reduced.
description: Latex, 7 pages; v2 & v3 have Ref. 7 updated, and Added Notes and Appendix dealing with the multi-atom unit cell case
TOXICITY ASSESSMENT OF KEDROSTIS AFRICANA COGN A MEDICINAL PLANT USED IN THE MANAGEMENT OF OBESITY IN SOUTH AFRICA USING BRINE SHRIMP.pdf
Creators: name: Unuofin, Jeremiah Oshiomame
Publisher: name: figshare
Year: 2018
Subjects: Toxicology

description: Baboon's Cucumber (Kedrostis africana (Linnaeus) Cogn is a monoecious caudiciform plant that belongs to Cucurbitaceae family. Baboon's Cucumber is used traditionally for the management of syphilis and obesity in South Africa. In the present study, we examined the hatchability and lethality of Baboon's Cucumber bulb extracts against brine shrimps. The tested samples were aqueous extract, acetone extract, and ethanol extract. Cytotoxicity was screened using Brine Shrimp Lethality Test (BSLT). The hatching success was in the order: ethanol extracts (49.2%) >aqueous extract (45.4%) >acetone extract (45.2%). All the extracts hatching success were significantly higher than the positive control (potassium dichromate) (p <0.05). Based on Clarkson’s toxicity index, LC50> 1 mg/mL were considered non-toxic for acetone extract while the aqueous and ethanolic extracts were considered to be moderately toxic (LC50 100-500 μg/mL) with LC50 of 0.298 and 0.489 mg/mL respectively. In conclusion, since the aqueous and ethanolic bulb extracts of K. africana exhibits potent cytotoxic property comparable to that of standard drug. Therefore, this might be utilized for the development of novel anticancer drug leads and the nontoxic acetonic extracts could further be exploited for the development of plant-based pharmaceuticals.
Towards MQGP
Creators: name: Dhuria, Mansi
name: Misra, Aalok
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For the Ouyang embedding we calculate the chemical potential mu_C due to a U(1) gauge field on the w.v. of N_f D7-branes wrapped around a 4-cycle in a resolved warped deformed conifold with (M)N (fractional)D3-branes of [1], and show the possible thermodynamical stability up to linear order in the embedding parameter. In the spirit of [2] we obtain the local type IIA mirror using SYZ mirror symmetry near (theta_{1,2},psi)=(,{0,2pi,,4pi}) and then oxidize the same to M theory. We take two limits of this uplift:(i)g_s,g_sN_f,g_sM^2/N,g_s^2M N_f<<1,g_sM,g_sN>>1 similar to [1] effected by M eps^{-3d/2}, N eps^{-19d},g_s epsn^d,d>0 and eps<=O(0.01);(ii)the `MQGP limit' g_sM^2/N<<1, g_sN>>1 for finite g_s,M, effected by: g_s eps, M eps^{-3d/2},N eps^{-39d},d>0, eps=0,pi due to poles. Introducing a small-angle cut-off c and using the =c,(pi-c)-local uplift the specific heat from the IR-finite part of the action (c-independent) turns out to be positive indicative of the thermodynamical stability of the uplift. An ALD-gravity-type interpretation can be given to the counter-terms for(i). Its verified that the black M3-brane entropy S r_h^3 from M-theoretic thermodynamical methods and the horizon areas of types IIB/IIA/M3-brane solutions.
description: 1+58 pages, LaTeX; v4 some minor corrections, results unchanged
Flux and Spectral Variation Characteristics of 3C 454.3 at the GeV Band
Creators: name: Zhang, Hai-Ming
name: Zhang, Jin
name: Lu, Rui-Jing
name: Yi, Ting-Feng
name: Huang, Xiao-Li
name: Liang, En-Wei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyze the long-term lightcurve of 3C 454.3 observed with Fermi/LAT and investigate its relation to the flux in the radio, optical, and X-ray bands. By fitting the 1-day binned GeV lightcurve with multiple Gaussian function (MGF), we propose that the typical variability timescale in the GeV band is 1--10 days. The GeV flux variation is accompanied by the spectral variation characterized as flux-tracking, i.e., "harder when brighter". The GeV flux is correlated with the optical and X-ray fluxes, and a weak correlation between gamma-ray flux and radio flux is also observed. The gamma-ray flux is not correlated with the optical linear polarization degree for the global lightcurves, but they show a correlation for the lightcurves before MJD 56000. The power density spectrum of the global lightcurve shows an obvious turnover at ~7.7 days, which may indicate a typical variability timescale of 3C 454.3 in the gamma-ray band. This is also consistent with the derived timescales by fitting the global lightcurve with MGF. The spectral evolution and an increase of the optical linear polarization degree along with the increase of the gamma-ray flux may indicate that the radiation particles are accelerated and the magnetic field is ordered by the shock processes during the outbursts. In addition, the nature of 3C 454.3 may be consistent with the self-organized criticality system, similar to Sagittarius A, and thus the outbursts are from plasmoid ejections driven by magnetic reconnection. This may further support the idea that the jet radiation regions are magnetized.
description: 29 pages, 9 figures, accepted for publication in RAA
The MaMBA facility as a testbed for bioregenerative life support systems
Creators: name: Heinicke, Christiane
name: Verseux, Cyprien
Publisher: name: Elsevier Science
Year: 2023
Subjects: subject: Extraterrestrial habitation
subject: Mars exploration
subject: BLSS
subject: Test platform
subject: Human centered design
subject: 600

description: The Moon and Mars Base Analog (MaMBA) is a concept for an extraterrestrial habitat developed at the Center of Applied Space Technology and Microgravity (ZARM) in Bremen, Germany. The long-term goal of the associated project is to create a technologically functioning prototype for a base on the Moon and on Mars. One key aspect of developing such a prototype base is the integration of a bioregenerative life support system (BLSS) and its testing under realistic conditions. A long-duration mission to Mars, in particular, will require BLSS with a reliability that can hardly be reached without extensive testing, starting well in advance of the mission. Standards exist for comparing the capabilities of various BLSS, which strongly focus on technological aspects. These, we argue, should be complemented with the use of facilities that enable investigations and optimization of BLSS prototypes with regard to their requirements on logistics, training, recovery from failure and contamination, and other constraints imposed when humans are in the loop. Such facilities, however, are lacking. The purpose of this paper is to present the MaMBA facility and its potential usages that may help close this gap. We describe how a BLSS (or parts of a BLSS) can be integrated into the current existing mock-up at the ZARM for relatively low-cost investigations of human factors affecting the BLSS. The MaMBA facility is available through collaborations as a test platform for characterizing, benchmarking, and testing BLSS under nominal and off-nominal conditions.
High quality mechanical and optical properties of commercial silicon nitride membranes
Creators: name: Zwickl, B. M.
name: Shanks, W. E.
name: Jayich, A. M.
name: Yang, C.
name: Jayich, A. C. Bleszynski
name: Thompson, J. D.
name: Harris, J. G. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have measured the optical and mechanical loss of commercial silicon nitride membranes. We find that 50 nm-thick, 1 mm^2 membranes have mechanical Q > 10^6 at 293 K, and Q > 10^7 at 300 mK, well above what has been observed in devices with comparable dimensions. The near-IR optical loss at 293 K is less than 2E-4. This combination of properties make these membranes attractive candidates for studying quantum effects in optomechanical systems.
description: 4 pages, 4 figures
The light bound states of $\mathcal{N}=1$ supersymmetric SU(3) Yang-Mills theory on the lattice
Creators: name: Ali, Sajid
name: Bergner, Georg
name: Gerber, Henning
name: Giudice, Pietro
name: Münster, Gernot
name: Montvay, Istvan
name: Piemonte, Stefano
name: Scior, Philipp
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article we summarise our results from numerical simulations of $\mathcal{N}=1$ supersymmetric Yang-Mills theory with gauge group SU(3). We use the formulation of Curci and Veneziano with clover-improved Wilson fermions. The masses of various bound states have been obtained at different values of the gluino mass and gauge coupling. Extrapolations to the limit of vanishing gluino mass indicate that the bound states form mass-degenerate supermultiplets.
description: 18 pages, 11 figures
Detecting Similarity of Rational Plane Curves
Creators: name: Alcázar, Juan Gerardo
name: Hermoso, Carlos
name: Muntingh, Georg
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Computational Geometry (cs.CG)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 14Q05, 68W30

description: A novel and deterministic algorithm is presented to detect whether two given rational plane curves are related by means of a similarity, which is a central question in Pattern Recognition. As a by-product it finds all such similarities, and the particular case of equal curves yields all symmetries. A complete theoretical description of the method is provided, and the method has been implemented and tested in the Sage system for curves of moderate degrees.
description: 22 pages
title: ADCO, Boursier de Cîteaux : comptes (1489-1493) (11 H 1166), f. 00072
Creators: name: de la Côte-d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
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: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Boursier de Cîteaux : comptes (1489-1493), Archives départementales de la Côte-d'Or, (11 H 1166). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Boursier de Cîteaux : comptes (1489-1493), Archives départementales de la Côte-d'Or, (11 H 1166), f. 00072, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
On Stirling Numbers and Euler Sums
Creators: name: Adamchik, Victor S.
Publisher: name: Carnegie Mellon University
Year: 1973
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: In this paper, we propose another yet generalization of Stirling numbers of the first kind for noninteger values of their arguments. We discuss the analytic representations of Stirling numbers through harmonic numbers, the generalized hypergeometric function and the logarithmic beta integral. We present then infinite series involving Stirling numbers and demonstrate how they are related to Euler sums. Finally, we derive the closed form for the multiple zeta function ζ(p, 1,…, 1) for Re(p)>1.
Twist and Return−Induced Ring Strain Triggers Quick Relaxation of a (Z)-Stabilized Cyclobisazobenzene
Creators: name: Slavov, Chavdar
name: Yang, Chong
name: Heindl, Andreas Hans
name: Stauch, Tim
name: Wegner, Hermann A.
name: Dreuw, Andreas
name: Wachtveitl, Josef
Publisher: name: American chemical society
Year: 2018
Subjects: subject: Absorption
subject: Isomerization
subject: Molecular structure
subject: Photoisomerization
subject: Ultrafast phenomena
subject: 540

description: Continuous irradiation of the thermodynamically stable (Z,Z)-cyclobisazobenzene does not lead to accumulation of a (Z,E) or (E,E) isomer as one might expect. Our combined experimental and computational investigation reveals that Z → E photoisomerization still takes place on an ultrafast time scale but induces large ring strain in the macrocycle, which leads to a very fast thermal back-isomerization, preventing photostationary accumulation of (E)-isomers.
Doi-Peliti Path Integral Methods for Stochastic Systems with Partial Exclusion
Creators: name: Greenman, Chris D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Doi-Peliti methods are developed for stochastic models with finite maximum occupation numbers per site. We provide a generalized framework for the different Fock spaces reported in the literature. Paragrassmannian techniques are then utilized to construct path integral formulations of factorial moments. We show that for many models of interest, a Magnus expansion is required to construct a suitable action, meaning actions containing a finite number of terms are not always feasible. However, for such systems, perturbative techniques are still viable, and for some examples, including carrying capacity population dynamics, and diffusion with partial exclusion, the expansions are exactly summable.
Lettre de Esprit-Claude-François Calvet à Jean-François Séguier, 1766-10-18
Creators: name: Calvet, Esprit-Claude-François
name: Esprit-Claude-François Calvet
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2021
Subjects: Bibliographie
Librairie

description: [transcription] Monsieur

Je reçus hier votre lettre avec celle qui était adressée à M. de Vérone. Outre que je m'acquitte de vos commissions avec le plus grand plaisir, j'ai fait celle-ci d'autant plus volontiers que je vois tous les jours M. de Vérone le père qui a le malheur d'être atteint de la pierre dans la vessie et qui doit être opéré au premier jour. M. son fils a été charmé d'apprendre par vous-même que ces cailloux de Remusat vous aient fait plaisir, il me recommande très fortement de vous assurer de son respect et de vous offrir ses services.

Je n'oublie point votre commission du portrait de Laure mais M. l'abbé de Sade est toujours à Saumanes et cette absence m'arrête tout court. Car je suis confus d'avoir été obligé de différer de vous faire copier ce tableau. Il y a ici à vendre un tableau qui représente la fontaine de Vaucluse [fol. 81v] avec le commencement de son cours, il est de bonne main, ce paysage figurerait très bien dans un salon oùse trouverait le portrait de Laure.

L'ouvrage de M. Bertrand est enfin entre les mains du public, vous vous doutez bien que je n'ai rien de plus pressé que de vous en envoyer un exemplaire. Je vous prie de l'agréer, M. Bertand voulu mettre l'avertissement quevous y lirez, je n'ai pu me refuser à ses vues et il a fallu me donner publiquement pour l'éditeur de cet ouvrage.

Conservez-vous toujours, Monsieur, et soyez persuadé de l'attachement respectueux avec lequel je suis

Monsieur

Votre très humble et très obéissant serviteur

Calvet

Avignon ce 18octobre 1766

En attendant le tableau je vous envoie l'estampe de Laure et celle de Pétrarque, ces portraits tant l'un et l'autre d'après les originaux de M. de Sade.
description: [objet joint à la lettre] Gravure
description: Gravure
description: [description objet] Estampe représentant de Pétrar Estampe représentant Laure de
description: [personnes citées] Denis Moreau de Vérone, Élie Bertrand, Jacques-François-Paul Adonce de Sade, Père Vérone
description: [reférence bibliographique citée] Bertrand élie, Recueil de divers traités sur l'histoire naturelle de la terre et des fossiles, Avignon, L. Chambeau 1766.
description: Source: [lieu de Conservation] Nîmes, Bibliothèque Carré d'Art [cote]ms. 140, fol. 81-81v
description: Source: ark:/12148/btv1b10015185m
Alliacane-Type Secondary Metabolites from Submerged Cultures of the Basidiomycete Clitocybe nebularis
Creators: name: Schrey, Hedda
name: Scheele, Tarek
name: Ulonska, Conrad
name: Nedder, Dana Leoni
name: Neudecker, Tim
name: Spiteller, Peter
name: Stadler, Marc
Publisher: name: American chemical society
Year: 2022
Subjects: subject: Absolute configuration
subject: Carbon
subject: Chemical structure
subject: Circular dichroism spectroscopy
subject: Sesquiterpenoids
subject: 540

description: Seven sesquiterpenoids, named nebucanes A–G (1–7), featuring a rare alliacane scaffold with unprecedented furan or pyrrole functions, were isolated from the fermentation broth of Clitocybe nebularis. Their structures were established on the basis of 1D/2D NMR spectroscopic analyses, HR-(+)-ESIMS spectra, and comparison of measured and calculated CD spectra for determination of the absolute configuration. Assessing the biological activities, nebucane D (4) exhibited antifungal effects against Rhodotorula glutinis, while nebucane G (7) displayed significant cytotoxicity against MCF-7 and A431 cell lines.
The Health Care System in India
Creators: name: Ghosh, Soumitra
Publisher: name: Universität Bremen
Year: 2025
Subjects: subject: India
subject: health
subject: health care
subject: health care system
subject: 300

description: This country report provides a description of the emergence of a health care system under public responsibility in India. The inception of the health care system refers to the first legislation stipulating entitlements to medical care. The report also includes a brief description of major health care reforms, and the current organization of the health care system in India. This report is part of the CRC 1342 Social Policy Country Briefs Series.
On Statistical Query Sampling and NMR Quantum Computing
Creators: name: Avrim  Blum
name: Yang, Ke
Publisher: name: Carnegie Mellon University
Year: 1972
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We introduce a "statistical query sampling" model, in which the goal of an algorithm is to produce an element in a hidden set S⊆{0,1}n with reasonable probability. The algorithm gains information about S through oracle calls (statistical queries), where the algorithm submits a query function g(·) and receives an approximation to Prx∈S[g(x)=1]. We show how this model is related to NMR quantum computing, in which only statistical properties of an ensemble of quantum systems can be measured, and in particular to the question of whether one can translate standard quantum algorithms to the NMR setting without putting all of their classical postprocessing into the quantum system. Using Fourier analysis techniques developed in the related context of statistical query learning, we prove a number of lower bounds (both information-theoretic and cryptographic) on the ability of algorithms to produce an x∈S, even when the set S is fairly simple. These lower bounds point out a difficulty in efficiently applying NMR quantum computing to algorithms such as Shor's and Simon's algorithm that involve significant classical postprocessing. We also explicitly relate the notion of statistical query sampling to that of statistical query learning.
The VLT-FLAMES survey of massive stars: atmospheric parameters and rotational velocity distributions for B-type stars in the Magellanic Clouds
Creators: name: Hunter, I.
name: Lennon, D. J.
name: Dufton, P. L.
name: Trundle, C.
name: Simon-Diaz, S.
name: Smartt, S. J.
name: Ryans, R. S. I.
name: Evans, C. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We provide atmospheric parameters and rotational velocities of a large sample (~400) of O- and early B-type stars, analysed in a homogeneous and consistent manner, for use in constraining theoretical models. Comparison of the rotational velocities with evolutionary tracks suggest that the end of core hydrogen burning occurs later than currently predicted. We also show that the large number of the luminous blue supergiants observed in the fields are unlikely to have directly evolved from main-sequence massive O-type stars as neither their low rotational velocities or position on the H-R diagram are predicted. We suggest that blue-loops or mass-transfer binary systems may populate the blue supergiant regime. By comparing the rotational velocity distributions of the Magellanic Cloud stars to a similar Galactic sample we find that (at 3sigma confidence level) massive stars (above 8Msun) in the SMC rotate faster than those in the solar neighbourhood. However there appears to be no significant difference between the rotational velocity distributions in the Galaxy and the LMC. We find that the vsini distributions in the SMC and LMC can modelled with an intrinsic rotational velocity distribution which is a Gaussian peaking at 175km/s (SMC) and 100km/s (LMC). We find that in NGC346 in the SMC, the 10-25Msun main-sequence stars appear to rotate faster than their higher mass counterparts. Recently Yoon et al. (2006) have determined rates of GRBs by modelling rapidly rotating massive star progenitors. Our measured rotational velocity distribution for the 10-25Msun stars is peaked at slightly higher velocities than they assume, supporting the idea that GRBs could come from rapid rotators with initial masses as low as 14Msun at low metallicities. (abridged).
description: 25 pages with tables. 11 figures. Submitted to A&A and corrected for referee's comments
Observation of long phase-coherence length in epitaxial La-doped CdO thin films
Creators: name: Yun, Yu
name: Ma, Yang
name: Tao, Songsheng
name: Xing, Wenyu
name: Chen, Yangyang
name: Su, Tang
name: Yuan, Wei
name: Wei, Jian
name: Lin, Xi
name: Niu, Qian
name: Xie, X. C.
name: Han, Wei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The search for long electron phase coherence length, which is the length that an electron can keep its quantum wave-like properties, has attracted considerable interest in the last several decades. Here, we report the long phase coherence length of ~ 3.7 micro meters in La-doped CdO thin films at 2 K. Systematical investigations of the La doping and the temperature dependences of the electron mobility and the electron phase coherence length reveal contrasting scattering mechanisms for these two physical properties. Furthermore, these results show that the oxygen vacancies could be the dominant scatters in CdO thin films that break the electron phase coherence, which would shed light on further investigation of phase coherence properties in oxide materials.
description: 13 pages, 6 figure. SI: 8 pages. To appear in Phys. Rev. B
Perturbation approach for computing frequency- and time-resolved photon correlation functions
Creators: name: Holdaway, David I. H.
name: Notararigo, Valentina
name: Olaya-Castro, Alexandra
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We propose an alternative formulation of the sensor method presented in [Phys. Rev. Lett 109, 183601 (2012)] for the calculation of frequency-filtered and time-resolved photon correlations. Our approach is based on an algebraic expansion of the joint steady state of quantum emitter and sensors with respect to the emitter-sensor coupling parameter ε. This allows us to express photon correlations in terms of the open quantum dynamics of the emitting system only and ensures that computation of correlations are independent on the choice of a small value of ε. Moreover, using time-dependent perturbation theory, we are able to express the frequency- and time- resolved second-order photon correlation as the addition of three components, each of which gives insight into the physical processes dominating the correlation at different time scales. We consider a bio-inspired vibronic dimer model to illustrate the agreement between the original formulation and our approach.
description: 12 pages, 5 figures
Joint Unitary Triangularization for Gaussian Multi-User MIMO Networks
Creators: name: Khina, Anatoly
name: Livni, Idan
name: Hitron, Ayal
name: Erez, Uri
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The problem of transmitting a common message to multiple users over the Gaussian multiple-input multiple-output broadcast channel is considered, where each user is equipped with an arbitrary number of antennas. A closed-loop scenario is assumed, for which a practical capacity-approaching scheme is developed. By applying judiciously chosen unitary operations at the transmit and receive nodes, the channel matrices are triangularized so that the resulting matrices have equal diagonals, up to a possible multiplicative scalar factor. This, along with the utilization of successive interference cancellation, reduces the coding and decoding tasks to those of coding and decoding over the single-antenna additive white Gaussian noise channel. Over the resulting effective channel, any off-the-shelf code may be used. For the two-user case, it was recently shown that such joint unitary triangularization is always possible. In this paper, it is shown that for more than two users, it is necessary to carry out the unitary linear processing jointly over multiple channel uses, i.e., space-time processing is employed. It is further shown that exact triangularization, where all resulting diagonals are equal, is still not always possible, and appropriate conditions for the existence of such are established for certain cases. When exact triangularization is not possible, an asymptotic construction is proposed, that achieves the desired property of equal diagonals up to edge effects that can be made arbitrarily small, at the price of processing a sufficiently large number of channel uses together.
description: Extended version of published paper in IEEE Transactions on Information Theory, vol. 61, no. 5, pp. 2662-2692, May 2015
On static reachability analysis of IP networks
Creators: name: Xie, Geoffrey G.
Publisher: name: Carnegie Mellon University
Year: 1994
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "The primary purpose of a network is to provide reachability between applications running on end hosts. In this paper, we describe how to compute the reachability a network provides from a snapshot of the configuration state from each of the routers. Our primary contribution is the precise definition of the potential reachability of a network and a substantial simplification of the problem through a unified modeling of packet filters and routing protocols. In the end, we reduce a complex, important practical problem to computing the transitive closure to set union and intersection operations on reachability set representations. We then extend our algorithm to model the influence of packet transformations (e.g., by NATs or ToS remapping) along the path. Our technique for static analysis of network reachability is valuable for verifying the intent of the network designer, troubleshooting reachability problems, and performing 'what-if' analysis of failure scenarios."
The Role of Oxygen in Ionic Liquid Gating on 2D Cr2Ge2Te6: a Non-Oxide Material
Creators: name: Chen, Yangyang
name: Xing, Wenyu
name: Wang, Xirui
name: Shen, Bowen
name: Yuan, Wei
name: Su, Tang
name: Ma, Yang
name: Yao, Yunyan
name: Zhong, Jiangnan
name: Yun, Yu
name: Xie, X. C.
name: Jia, Shuang
name: Han, Wei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Ionic liquid gating can markedly modulate the materials' carrier density so as to induce metallization, superconductivity, and quantum phase transitions. One of the main issues is whether the mechanism of ionic liquid gating is an electrostatic field effect or an electrochemical effect, especially for oxide materials. Recent observation of the suppression of the ionic liquid gate-induced metallization in the presence of oxygen for oxide materials suggests the electrochemical effect. However, in more general scenarios, the role of oxygen in ionic liquid gating effect is still unclear. Here, we perform the ionic liquid gating experiments on a non-oxide material: two-dimensional ferromagnetic Cr2Ge2Te6. Our results demonstrate that despite the large increase of the gate leakage current in the presence of oxygen, the oxygen does not affect the ionic liquid gating effect (< 5 % difference), which suggests the electrostatic field effect as the mechanism on non-oxide materials. Moreover, our results show that the ionic liquid gating is more effective on the modulation of the channel resistances compared to the back gating across the 300 nm thick SiO2.
description: 17 pages, 6 figure. To appear in ACS Applied Materials & Interfaces
On solving Boolean combinations of generalized 2SAT constraints
Creators: name: Sanjit A. Seshia
name: K  Subramani
name: Bryant, Randal
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "We consider the satisfiability problem for Boolean combinations of generalized 2SAT constraints, which are linear constraints with at most two, possibly unbounded, integer variables having coefficients in [-1, 1]. We prove that if a satisfying solution exists, then there is a solution with each variable taking values in [-n ┬╖ ([superscript b]max + 1), n ┬╖ ([superscript b]max + 1)], where n is the number of variables, and b[subscript max] is the maximum over the absolute values of constants appearing in the constraints. This solution bound improves over previously obtained bounds by an exponential factor. Our result enables a new enumerative approach to satisfiability checking. An experimental evaluation demonstrates the efficiency of this approach over previous techniques. As a corollary of our main result, we obtain a polynomial-time algorithm for approximating optima of generalized 2SAT integer programs to within an additive factor."
An improved Landauer Principle with finite-size corrections
Creators: name: Reeb, David
name: Wolf, Michael M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Landauer's Principle relates entropy decrease and heat dissipation during logically irreversible processes. Most theoretical justifications of Landauer's Principle either use thermodynamic reasoning or rely on specific models based on arguable assumptions. Here, we aim at a general and minimal setup to formulate Landauer's Principle in precise terms. We provide a simple and rigorous proof of an improved version of the Principle, which is formulated in terms of an equality rather than an inequality. The proof is based on quantum statistical mechanics concepts rather than on thermodynamic argumentation. From this equality version, we obtain explicit improvements of Landauer's bound that depend on the effective size of the thermal reservoir and reduce to Landauer's bound only for infinite-sized reservoirs.
description: v2: 33 pages, 3 figures, minor changes and additions, references updated; v3: published version, title changed, 23+11 pages, 3 figures, some sections and appendices reordered, many minor changes, results unchanged
On Representing Biological Systems through Multiset Rewriting
Creators: name: S.  Bistarelli
name: Iliano  Cervesato
name: G.  Lenzini
name: R.  Marangoni
name: F.  Martinelli
Publisher: name: Carnegie Mellon University
Year: 1974
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We model qualitative and quantitative aspects of metabolic pathways by using a stochastic version of Multiset Rewriting (SMSR). They offer a natural way of describing both the static and the dynamic aspects of metabolic pathways. We argue that, due to its simple conceptual model, SMSR may be conveniently used as an intermediate language where many higher level specification languages may be compiled (e.g., as in the security protocol example). As a first step, we show also how SMSR may be used to simulate Stochastic Petri Nets for describing metabolic pathways.