cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Systematic Retrieval Analysis of Secondary Eclipse Spectra I: A Comparison of Atmospheric Retrieval Techniques
Creators: name: Line, Michael R.
name: Wolf, Aaron
name: Zhang, Xi
name: Knutson, Heather
name: Kammer, Joshua
name: Ellison, Elias
name: Deroo, Pieter
name: Crisp, Dave
name: Yung, Yuk
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Spectra of exoplanet atmospheres provide us the opportunity to improve our understanding of these objects just as remote sensing in our own solar system has increased our understanding of the solar system bodies. The challenge is to quantitatively determine the range of temperatures and species abundances allowed by the data. This challenge is often difficult given the low information content of most exoplanet spectra which commonly leads to degeneracies in the interpretation. A variety of temperature and abundance retrieval approaches have been applied to exoplanet spectra, but no previous investigations have sought to compare these approaches. In this investigation we compare three different retrieval methods: Optimal Estimation, Differential Evolution Markov Chain Monte Carlo, and Bootstrap Monte Carlo. We call our suite of retrieval algorithms the Caltech Inverse Modeling and Retrieval Algorithms (CHIMERA). We discuss what we can expect in terms of uncertainties in abundances and temperatures given current observations as well as potential future observations and what conclusions can be drawn given those uncertainties. In general we find that the three approaches agree for high quality spectra expected to come from potential future spaceborne missions, but disagree for low quality spectra representative of current observations. We also show that the Gaussian posterior probability distribution assumption made in the Optimal Estimation approach is valid for high quality spectral data. We also discuss the implications of our models for the inferred C to O ratios of exoplanetary atmospheres, which of course are important for understanding formation environments. More specifically we show that in the observational limit of a few photometric points, the retrieved C/O is biased towards values near solar and near one simply due to the assumption of uninformative priors.
description: 27 pages, 13 figures
title: Языковая личность учителя-словесника и преподавателя-филолога в аспекте проблем сохранения русского языка как национально-культурной ценности
Creators: name: Загоровская, Ольга
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Статья посвящена актуальным проблемам сохранения русского языка как национально-культурной ценности русского народа, которые рассматриваются во взаимосвязи с динамическими изменениями в развитии русского языка в новейший период его истории, состоянием филологического образования в современной России и характеристиками языковой личности учителя и преподавателя русского языка. Основное внимание уделяется типам речевых культур в современном российском обществе и обоснованию выводов об особой значимости культурноречевой составляющей языковой личности филологов, профессиональная деятельность которых связана с языковым образованием молодых носителей русского языка. Применительно к вопросам развития и сохранения русского языка, а также применительно к вопросам языкового образования и современной языковой политики теория типов речевых культур применяется впервые.
Sulfanyl chloride induced heterocyclization of N-(pyrazolyl)styrylacetamides
Creators: name: Danyliuk, Ivanna Yu.
name: Vas’kevich, Ruslan I.
name: Vas'kevich, Alla I.
name: Rusanov, Eduard B.
name: Vovk, Mykhailo V.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Plant Biology

description: Heterocyclization of N-(pyrazol-3-yl)styrylacetamides with arenesulfenyl chlorides yields the corresponding tetrahydrofuran-2-iminium perchlorates isolable after chromatography as trans-5-aryl-4-(arylthio)tetrahydrofuran-2-ones and 5-aryl-4-(arylthio)-1-(pyrazol-3-yl)pyrrolidin-2-ones, with the latter predominating. N-(Pyrazol-4-yl)styrylacetamides react under analogous conditions to give 5-aryl-4-(arylthio)-1-(pyrazol-4-yl)pyrrolidin-2-ones, 4-aryl-3-(arylthio)-4-chloro-N-(1-methylpyrazol-4-yl)butanamides, and tetrahydrofuran-2-iminium perchlorates which, when chromatographed, produce 5-aryl-4-(arylthio)dihydrofuran-2(3H)-ones and 4-aryl-3-(arylthio)-4-methoxy-N-(1-methyl-1H-pyrazol-4-yl)butanamides.
Theoretical study on copper's energetics and magnetism in TiO2 polymorphs
Creators: name: Assadi, M. Hussein. N.
name: Hanaor, Dorian A. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We carried out density functional theory calculations to model the electronic structure and the magnetic interactions in copper doped anatase and rutile titanium dioxide in order to shed light on the potential of these systems as magnetic oxides using different density functional schemes. In both polymorphs copper dopant was found to be most stable in substitutional lattice positions. Ferromagnetism is predicted to be stable well above room temperature with long range interactions prevailing in the anatase phase while the rutile phase exhibits only short range superexchange interaction among nearest neighbouring Cu ions. Additionally, energetic evaluation of dopants in scattered and compact configurations reveals a dopant clustering tendency in anatase TiO2.
description: 13 pages, five figures, one table
Process Development and Material Characterization for the Injection Molding of Long Glass Fiber-Reinforced Phenol Formaldehyde Resins
Creators: name: Maertens, Robert
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2022
Subjects: thermoset injection molding
phenolic molding compound
fiber length measurement
long
fiber processing
plasticizing work
injection work
screw mixing element
process data acquisition

description: Im Rahmen dieser Arbeit wird die Verarbeitung langglasfaserverstärkter Phenolharze im Spritzgießverfahren untersucht. Es wird die Entwicklung einer neuen Spritzgießprozessvariante beschrieben, welche mithilfe einer direkten Langglasfaserzuführung die Herstellung von Bauteilen aus kurz- und lang-glasfaserverstärktem Phenol-Formaldehyd-Harz ermöglicht. Dabei sind die Anteile der kurzen und langen Verstärkungsfasern individuell einstellbar. Die Struktur und die Eigenschaften der mit diesem Verfahren hergestellten Bauteile werden charakterisiert und mit denen von Bauteilen aus langglasfaserverstärkten, granulatförmigen Formmassen verglichen. Im Gegensatz zu thermoplastischen Polymeren stellt das duromere Phenol-harz aufgrund der irreversiblen chemischen Vernetzung bei der Verarbeitung zusätzliche Herausforderungen an die Prozessführung. Ein zentrales Entwicklungsziel dieser Arbeit ist die Abwägung zwischen der ungewünschten Faser-kürzung einerseits und der erforderlichen Homogenisierung von Fasern und Phenolharz andererseits. Die Entwicklung und die Validierung von duromer-spezifischen Mischelementen für das Spritzgießen werden vorangetrieben. Charakterisierungsmethoden für die Faserlängenmessung und die Bewertung der Materialhomogenität werden entwickelt, validiert und auf Zwischenprodukte sowie auf spritzgegossene Bauteile angewendet. Im Zusammenspiel mit etablierten Charakterisierungstechniken wie der dynamischen Differenz-kalorimetrie, der Rheologie, der Rasterelektronenmikroskopie, der mechanischen Charakterisierung und der optischen Bewertung von Schliffbildern werden somit die Prozess-Struktur-Eigenschafts-Beziehungen in der Spritzgießverarbeitung von lang- und kurzglasfaserverstärkten Formmassen herausgearbeitet.
Phosphorylation of pyridoxal azomethines. Synthesis of phosphorus containing azomethines and furopyridines
Creators: name: Pudovik, Michael A.
name: Kibardina, Lyudmila
name: Trifonov, Alexey
name: Dobrynin, Alexey
name: Katsyuba, Sergei
name: Burilov, Alexander
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: New O-phosphorylated pyridoxal derivatives have been synthesized through the reaction of azomethines with РV acid chlorides. 2-Chloro-2-thioxo-5,5-dimethyl-1,3,2-dioxaphosphinanes and diethylchlorothiophosphate have been employed as phosphorylating agents. Regardless of the nature of the phosphorylating agent, the reaction is regioselective at phenolic hydroxyl group. The structure of final products is determined by the nature of the substituent at the nitrogen atom. If R is alkyl or cycloalkyl group, the products of the reaction represent phosphorylated pyridoxal imines, whereas phosphorylated furopyridines are formed in the case R is aryl substituent.
Boolean and Non-Boolean Computation With Spin Devices
Creators: name: Sharad, Mrigank
name: Augustine, Charles
name: Roy, Kaushik
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Recently several device and circuit design techniques have been explored for applying nano-magnets and spin torque devices like spin valves and domain wall magnets in computational hardware. However, most of them have been focused on digital logic, and, their benefits over robust and high performance CMOS remains debatable. Ultra-low voltage, current-switching operation of magneto-metallic spin torque devices can potentially be more suitable for non-Boolean computation schemes that can exploit current-mode analog processing. Device circuit co-design for different classes of non-Boolean-architectures using spin-torque based neuron models in spin-CMOS hybrid circuits show that the spin-based non-Boolean designs can achieve 15X-100X lower computation energy for applications like, image-processing, data-conversion, cognitive-computing, pattern matching and programmable-logic, as compared to state of art CMOS designs.
description: arXiv admin note: substantial text overlap with arXiv:1206.3227
title: SYSTEMS OF THE MUCOSAL LECTINS FOR MEDICAL TECHNOLOGIES (BRIEF ANALYSIS)
Creators: name: Lakhtin, Vladimir M.
name: Aleshkin, Vladimir A.
name: Lakhtin, Mikhail V.
name: Afanas’iev, Stanislav S.
name: Pchelintsev, Sergey Yu.
name: Stepanov, Aleksey V.
name: Dmitriev, Georgiy A.
name: Leontieva, Nina I.
name: Gracheva, Nina M.
name: Shmeleva, Elena A.
name: Manuilov, Boris M.
name: Eyberman, Aleksandr S.
Publisher: name: Astrakhan State Medical University
Year: 2019

description: An evaluation of technological prospects of mucosal lectins of the human mucosal biotope is presented. Protective lectins act as imitators of cells, reveal properties of carriers, deliveries, and distributors of glycopolymers (prebiotics, therapeutics, surface décors supporting functioning cells, tissues and organs) against infections and tumors. The lectin systems recognizing and binding synthetic sets of glycopolymers serve effective instruments for constructing biotope consortia. The model of a minimal bioreactor for testing prebiotic properties of glycopolymers, lectins and/or metal cations  is proposed. Key words: glycoconjugates, lectin systems, probiotics, synbiotics, mucosal organ, mucosal immunity, Gram-positive bacteria, bifidobacteria, lactobacilli, yeast-like fungi.
Two-phase xenon emission detector with electron multiplier and optical readout by multipixel avalanche Geiger photodiodes
Creators: name: Akimov, D. Yu.
name: Akindinov, A. V.
name: Alexandrov, I. S.
name: Belov, V. A.
name: Bolozdynya, A. I.
name: Burenkov, A. A.
name: Buzulutskov, A. F.
name: Danilov, M. V.
name: Efremenko, Yu. V.
name: Kirsanov, M. A.
name: Kovalenko, A. G.
name: Stekhanov, V. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A successful operation of a new optical readout system (THGEM + WLS + MGPDs (multichannel array of multipixel avalanche Geiger photodiodes) in a two-phase liquid xenon detector was demonstrated.
Equivalence between Born-Infeld tachyon and effective real scalar field theories for brane structures in warped geometry
Creators: name: Bernardini, Alex E.
name: Bertolami, O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An equivalence between Born-Infeld and effective real scalar field theories for brane structures is built in some specific warped space-time scenarios. Once the equations of motion for tachyon fields related to the Born-Infeld action are written as first-order equations, a simple analytical connection with a particular class of real scalar field superpotentials can be found. This equivalence leads to the conclusion that, for a certain class of superpotentials, both systems can support identical thick brane solutions as well as brane structures described through localized energy densities, $T_{00}(y)$, in the $5^{th}$ dimension, $y$. Our results indicate that thick brane solutions realized by the Born-Infeld cosmology can be connected to real scalar field brane scenarios which can be used to effectively map the tachyon condensation mechanism.
description: 15 pages, 3 figures
Constraints on Warm Dark Matter models from high-redshift long gamma-ray bursts
Creators: name: de Souza, Rafael S.
name: Mesinger, Andrei
name: Ferrara, Andrea
name: Haiman, Zoltan
name: Perna, Rosalba
name: Yoshida, Naoki
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Structures in Warm Dark Matter (WDM) models are exponentially suppressed below a certain scale, characterized by the dark matter particle mass, $m_{\rm x}$. Since structures form hierarchically, the presence of collapsed objects at high-redshifts can set strong lower limits on $m_{\rm x}$. We place robust constraints on $m_{\rm x}$ using recent results from the {\it Swift} database of high-redshift gamma-ray bursts (GRBs). We parameterize the redshift evolution of the ratio between the cosmic GRB rate and star formation rate (SFR) as $\propto (1+z)^α$, thereby allowing astrophysical uncertainties to partially mimic the cosmological suppression of structures in WDM models. Using a maximum likelihood estimator on two different $z>4$ GRB subsamples (including two bursts at $z>8$), we constrain $m_{\rm x} \gtrsim 1.6$-1.8 keV at 95% C.L., when marginalized over a flat prior in $α$. We further estimate that 5 years of a SVOM-like mission would tighten these constraints to $m_{\rm x} \gtrsim 2.3 $ keV. Our results show that GRBs are a powerful probe of high-redshift structures, providing robust and competitive constraints on $m_{\rm x}$.
description: 11 pages, 7 figures, accepted for publication in MNRAS
The first X-ray crystal structure of a mercury(II) complex with an SP(N)3-based ligand: Synthesis and crystal structure of SP(NC5H10)3 and [Hg{SP(NC5H10)3}Cl2]2
Creators: name: Taherzadeh, Maryam
name: Pourayoubi, Mehrdad
name: Nečas, Marek
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: The synthesis, spectral characteristics (IR and NMR), elemental analysis and X-ray crystal structure of phosphorothioic triamide SP(NC5H10)3 (1) and its dinuclear mercury(II) complex [Hg2(μ-Cl)2(Cl)2{SP(NC5H10)3}2] (2) were investigated. A survey using the Cambridge Structural Database (CSD, version 5.38, May 2017) shows structures of coordination compounds of Au, Ag, Cd, Cu, Li, Mo, Ni, Pd, Te, Ti, Zn, and Zr with sulfur-donor SP(N)3-based ligands; the complex 2 is the first example of a mercury complex with the SP(N)3-based ligand studied by X-ray crystallography. Valence bond calculation was performed for the Hg–S bond in 2 and compared with the Hg–O bond in the only structure with a Cl2Hg–OP(N)3 structural motive in the CSD. The calculation confirms a more covalent nature of the Hg–S bond with respect to the Hg–O bond made by the EP(N)3-based ligands (E = S, O). The supramolecular structures based on C–H···S = P contacts in 1 and C–H···SP and C–H···Cl–Hg assemblies in 2 are discussed.
Entropy currents from holography in hydrodynamics with charge
Creators: name: Plewa, Grzegorz
name: Spalinski, Michal
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The holographic interpretation of the hydrodynamic entropy current is developed for the case of hydrodynamics with a conserved charge. This is carried out within a framework developed in earlier work, which showed how to associate entropy currents with horizons in the dual geometry. The entropy current defined by the event horizon in the dual bulk geometry is calculated. It is also shown that to second order in the gradient expansion the dual geometry possesses a unique Weyl-invariant apparent horizon which also defines an admissable entropy current. At first order both currents coincide with the result obtained on the basis of a purely hydrodynamic analysis.
description: Additional comments and references; version appearing in JHEP. arXiv admin note: text overlap with arXiv:1102.2885
Building one-time memories from isolated qubits
Creators: name: Liu, Yi-Kai
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: One-time memories (OTM's) are simple tamper-resistant cryptographic devices, which can be used to implement one-time programs, a very general form of software protection and program obfuscation. Here we investigate the possibility of building OTM's using quantum mechanical devices. It is known that OTM's cannot exist in a fully-quantum world or in a fully-classical world. Instead, we propose a new model based on "isolated qubits" -- qubits that can only be accessed using local operations and classical communication (LOCC). This model combines a quantum resource (single-qubit measurements) with a classical restriction (on communication between qubits), and can be implemented using current technologies, such as nitrogen vacancy centers in diamond. In this model, we construct OTM's that are information-theoretically secure against one-pass LOCC adversaries that use 2-outcome measurements. Our construction resembles Wiesner's old idea of quantum conjugate coding, implemented using random error-correcting codes; our proof of security uses entropy chaining to bound the supremum of a suitable empirical process. In addition, we conjecture that our random codes can be replaced by some class of efficiently-decodable codes, to get computationally-efficient OTM's that are secure against computationally-bounded LOCC adversaries. In addition, we construct data-hiding states, which allow an LOCC sender to encode an (n-O(1))-bit messsage into n qubits, such that at most half of the message can be extracted by a one-pass LOCC receiver, but the whole message can be extracted by a general quantum receiver.
description: 36 pages; v2: better organized, better motivated, and easier to read
Bounds of cavitation inception in a creeping flow between eccentric cylinders rotating with a small minimum gap
Creators: name: Monakhov, A. A.
name: Chernyavski, V. M.
name: Shtemler, Yu.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76-05 Experimental work

description: Bounds of cavitation inception are experimentally determined in a creeping flow between eccentric cylinders, the inner one being static and the outer rotating at a constant angular velocity, Ω. The geometric configuration is additionally specified by a small minimum gap between cylinders, H, as compared with the radii of the inner and outer cylinders. For some values H and Ω, cavitation bubbles are observed, which are collected on the surface of the inner cylinder and equally distributed over the line parallel to its axis near the downstream minimum gap position. Cavitation occurs for the parameters {H,Ω} within a region bounded on the right by the cavitation inception curve that passes through the plane origin and cannot exceed the asymptotic threshold value of the minimum gap, Ha, in whose vicinity cavitation may occur at H
description: 9 pages, 3 figures, 1 table
Syntheses and structural characterizations of 2-pyridyl(N/O)spirocyclotriphosphazene derivatives
Creators: name: Elmas, Gamze
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Plant Biology
subject: FOS: Biological sciences
subject: 60506 Virology

description: The Cl exchange reaction of hexachlorocyclotriphosphazene, N3P3Cl6 (1), with one equimolar amount of sodium salt of N/O donor type bidentate ligand containing a 2-pyridyl pendant arm (2) afforded, regioselectively, the partly substituted 2-pyridyl(N/O)spirocyclotriphosphazene (3; with a yield of 65%) in THF. The reactions of 3 with excess pyrrolidine, morpholine and 1,4-dioxa-8-azaspiro[4,5]decane (DASD) led to the formation of the tetraamino-2-pyridyl(N/O)spirocyclotriphosphazenes (3a-3c) in high yields. Compound 3 also gave both tetrapiperidino (3d) and gem-bispiperidino (3e) products with excess piperidine. The structures of all the compounds were determined by elemental analyses, ESI-MS, FTIR, HSQC, HMBC and 1H, 13C, and 31P NMR techniques. The crystal structure of 3c was identified by single crystal X-ray crystallography. Besides, the compound 3e had one stereogenic P atom, and its chirality was verified by 31P NMR spectroscopy in the presence of (S)-(+)-2,2,2-trifluoro-1-(9’-anthryl)-ethanol (CSA).
The outburst decay of the low magnetic field magnetar SGR 0418+5729
Creators: name: Rea, N.
name: Israel, G. L.
name: Pons, J. A.
name: Turolla, R.
name: Vigano, D.
name: Zane, S.
name: Esposito, P.
name: Perna, R.
name: Papitto, A.
name: Terreran, G.
name: Tiengo, A.
name: Salvetti, D.
name: Girart, J. M.
name: Palau, Aina
name: Possenti, A.
name: Burgay, M.
name: Gogus, E.
name: Caliandro, A.
name: Kouveliotou, C.
name: Gotz, D.
name: Mignani, R. P.
name: Ratti, E.
name: Stella, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the long term X-ray monitoring of the outburst decay of the low magnetic field magnetar SGR 0418+5729, using all the available X-ray data obtained with RXTE, SWIFT, Chandra, and XMM-Newton observations, from the discovery of the source in June 2009, up to August 2012. The timing analysis allowed us to obtain the first measurement of the period derivative of SGR 0418+5729: \dot{P}=4(1)x10^{-15} s/s, significant at ~3.5 sigma confidence level. This leads to a surface dipolar magnetic field of B_dip ~6x 10^{12} G. This measurement confirms SGR 0418+5729 as the lowest magnetic field magnetar. Following the flux and spectral evolution from the beginning of the outburst up to ~1200 days, we observe a gradual cooling of the tiny hot spot responsible for the X-ray emission, from a temperature of ~0.9 to 0.3 keV. Simultaneously, the X-ray flux decreased by about 3 orders of magnitude: from about 1.4x10^{-11} to 1.2x10^{-14} erg/s/cm^2 . Deep radio, millimeter, optical and gamma-ray observations did not detect the source counterpart, implying stringent limits on its multi-band emission, as well as constraints on the presence of a fossil disk. By modeling the magneto-thermal secular evolution of SGR 0418+5729, we infer a realistic age of ~550 kyr, and a dipolar magnetic field at birth of ~10^{14} G. The outburst characteristics suggest the presence of a thin twisted bundle with a small heated spot at its base. The bundle untwisted in the first few months following the outburst, while the hot spot decreases in temperature and size. We estimate the outburst rate of low magnetic field magnetars to be about one per year per galaxy, and we briefly discuss the consequences of such result in several other astrophysical contexts.
description: ApJ in press (15 pages, 11 figures)
Noether current from surface term, Virasoro algebra and black hole entropy in bigravity
Creators: name: Katsuragawa, Taishi
name: Nojiri, Shin'ichi
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: We consider the static, spherically symmetric black hole solutions in bigravity theory for minimal model with a condition $f_{μν} = C^{2} g_{μν}$ and evaluate the entropy for black holes. In this condition, we show that there exists the Schwarzschild solution for $C^{2} = 1$, which is unique consistent solution. We examine how the massive spin-2 field contributes and affects to the Bekenstein-Hawking entropy corresponding to Einstein gravity. In order to obtain the black hole entropy, we use a recently proposed approach which use Virasoro algebra and central charge corresponding to surface term in the gravitational action.
description: 7 pages, version to appear in Physical Review D
A Catalog of Ultra-compact High Velocity Clouds from the ALFALFA Survey: Local Group Galaxy Candidates?
Creators: name: Adams, Elizabeth A. K.
name: Giovanelli, Riccardo
name: Haynes, Martha P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a catalog of 59 ultra-compact high velocity clouds (UCHVCs) extracted from the 40% complete ALFALFA HI-line survey. The ALFALFA UCHVCs have median flux densities of 1.34 Jy km/s, median angular diameters of 10', and median velocity widths of 23 km/s. We show that the full UCHVC population cannot easily be associated with known populations of high velocity clouds. Of the 59 clouds presented here, only 11 are also present in the compact cloud catalog extracted from the commensal GALFA-HI survey, demonstrating the utility of this separate dataset and analysis. Based on their sky distribution and observed properties, we infer that the ALFALFA UCHVCs are consistent with the hypothesis that they may be very low mass galaxies within the Local Volume. In that case, most of their baryons would be in the form of gas, and because of their low stellar content, they remain unidentified by extant optical surveys. At distances of ~1 Mpc, the UCHVCs have neutral hydrogen (HI) masses of ~10^5 -10^6 M_sun, HI diameters of ~2-3 kpc, and indicative dynamical masses within the HI extent of ~10^7 - 10^8 M_sun, similar to the Local Group ultra-faint dwarf Leo T. The recent ALFALFA discovery of the star-forming, metal-poor, low mass galaxy Leo P demonstrates that this hypothesis is true in at least one case. In the case of the individual UCHVCs presented here, confirmation of their extragalactic nature will require further work, such as the identification of an optical counterpart to constrain their distance.
description: 24 pages, 16 figures, published in ApJ, article updated for corrections to published version
Chiral charge order in 1$T$-TiSe$_2$: importance of lattice degrees of freedom
Creators: name: Zenker, B.
name: Fehske, H.
name: Beck, H.
name: Monney, C.
name: Bishop, A. R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We address the question of the origin of the recently discovered chiral property of the charge-density-wave phase in 1$T$-TiSe$_2$ which so far lacks a microscopic understanding. We argue that the lattice degrees of freedom seems to be crucial for this novel phenomenon. We motivate a theoretical model that takes into account one valence and three conduction bands, a strongly screened Coulomb interaction between the electrons, as well as the coupling of the electrons to a transverse optical phonon mode. The Falicov-Kimball model extended in this way possesses a charge-density-wave state at low temperatures, which is accompanied by a periodic lattice distortion. The charge ordering is driven by a lattice deformation and electron-hole pairing (excitonic) instability in combination. We show that both electron-phonon interaction and phonon-phonon interaction must be taken into account at least up to quartic order in the lattice displacement to achieve a stable chiral charge order. The chiral property is exhibited in the ionic displacements. Furthermore, we provide the ground-state phase diagram of the model and give an estimate of the electron-electron and electron-phonon interaction constants for 1$T$-TiSe$_2$.
description: 13 pages, 11 figures, revised and extended version
title: UTML: Unified Transaction Modeling Language
Creators: name: Gioldasis, Nektarios
Publisher: name: Technical University of Crete
Year: 2002

description: This thesis proposes UTML (Unified Transaction Modeling Language) as a high level, formal and extensible modeling language for complex transaction models for transactional web applications. Web applications impose several new characteristics that alter the notion of transaction. Such new characteristics are the hierarchical structure of transactions, the dependencies imposed between transactions of the same structure, the distributed nature of resources in the web, the use of other transactional world-wide distributed web services, and the integration (re-use) of diverse resources like legacy systems that already exist in organizations for many years. This thesis does not propose any new specific transaction model or any new transaction management system. Rather it proposes a design language for transactional web applications that can be used by application designers to analyze, model and document the complex transactions of the web applications and services, as well as to communicate the transactional semantics of an application to any interested party (designers and implementers –current or future ones-, customers or other applications).
Quantum limit of laser cooling in dispersively- and dissipatively-coupled optomechanical systems
Creators: name: Weiss, Talitha
name: Nunnenkamp, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Mechanical oscillators can be cooled by coupling them to an optical or microwave cavity. Going beyond the standard quantum noise approach we find an analytic expression for the steady-state phonon number in systems where the position of the mechanical oscillator modulates the cavity frequency as well as the cavity line width. We trace the origin for the quantum limit of cooling to fluctuations in the optical force both at and away from the mechanical frequency. Finally, we calculate the minimal phonon number for the different types of coupling. Our study elucidates how to beneficially combine dispersive and dissipative optomechanical coupling.
description: 4+1 pages, 3 figures
Hydrolysis of phosphate esters in aqueous solution promoted by cobalt(III)-tetraamine metallohydrolases: Chromatographic and spectroscopic studies
Creators: name: Bhengu, Thokoza
name: Wood, Tim
name: Shumane, Manelisi
name: Tafesse, Fikru
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Computational Biology

description: A combination of chromatographic and spectroscopic (Q-ToF/MS; FTIR) studies were conducted to further understand hydrolytic processes in reactions of phosphate mono- and phosphodiesters with model Cobalt(III)-tetraamine metallohydrolases of the type [CoL(OH)(OH2)]2+; L = (en)2, (tn)2; en = 1,2-diaminoethane, tn = 1,3-diaminopropane. High resolution mass spectroscopic (HRMS) analysis of the reaction fragments indicates that the monoester substrates undergo initial coordination to the metal center followed by an intramolecular hydroxyl attack on phosphorus, a process that is concerted with liberation of the bound alcoholic leaving group. The CoIII(tn)2 complex displays twice as more reactivity towards both mono- and phosphodiesters compared to the (en)2 analog under similar conditions, a behavior that is discussed in terms of the structural differences in the coordinated amine ligands. Plausible mechanisms for Co(III)-promoted hydrolysis of both the mono- and phosphodiesters are proposed.
A PCA approach to stellar effective temperatures
Creators: name: Bermejo, Julián Muñoz
name: Ramos, Andrés Asensio
name: Prieto, Carlos Allende
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The derivation of the effective temperature of a star is a critical first step in a detailed spectroscopic analysis. Spectroscopic methods suffer from systematic errors related to model simplifications. Photometric methods may be more robust, but are exposed to the distortions caused by interstellar reddening. Direct methods are difficult to apply, since fundamental data of high accuracy are hard to obtain. We explore a new approach in which the spectrum is used to characterize a star's effective temperature based on a calibration established by a small set of standard stars. We perform principal component analysis on homogeneous libraries of stellar spectra, then calibrate a relationship between the principal components and the effective temperature using a set of stars with reliable effective temperatures. We find that our procedure gives excellent consistency when spectra from a homogeneous set of observations are used. Systematic offsets may appear when combining observations from different sources. Using as reference the spectra of stars with high-quality spectroscopic temperatures in the Elodie library, we define a temperature scale for FG-type disk dwarfs with an internal consistency of about 50 K, in excellent agreement with temperatures from direct determinations, but distinct from widely used scales based on the infrared flux method.
description: Pages 1-9 Article and pages 9-22 Table. 7 Figures
Adsorption studies of dimethyl and methyl-ethyl ester molecules on silicene nanoring: Application of DFT study
Creators: name: Nagarajan, V.
name: Chandiramouli, R.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Developmental Biology
subject: Plant Biology
subject: FOS: Biological sciences

description: The electronic and adsorption properties of dimethyl and methyl-ethyl ester molecules on a silicene nanoring (SiNR) are studied using first-principles calculations. The adsorption properties of dimethyl and methyl-ethyl ester molecules on the surface of a silicene nanoring is investigated in terms of density of states spectrum, adsorption energy, average energy gap variation, Mulliken charge and Bader charge transfer. The structural stability of the SiNR is ensured using formation energy. The variation in the electron density and energy gap is noticed upon adsorption of dimethyl and methyl-ethyl ester molecules in the SiNR base material compared with its isolated counterpart. The highlights of the present work are silicene nanoring is used as a base material for ester molecule adsorption. The adsorption behavior of ester molecules is studied using energy band structure. The DOS spectrum confirms the transfer of electrons between the SiNR and ester molecules. The findings suggest that a SiNR can be used as a base material for the detection of dimethyl and methyl-ethyl ester molecules.
The Black Metal Tribometer: high-resolution measurement of normal load-indentation curves and partial slip hysteresis cycles
Creators: name: Fochler, Daniel
name: Schwarz, Stefan
name: Kohlmann, Lukas
name: Krack, Malte
Publisher: name: arXiv
Year: 2025
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A new instrument has been designed for measuring frictional hysteresis cycles and normal load-indentation curves. The primary purpose of the BMT is the validation of more predictive modeling approaches for damping in friction joints. An important original feature of the BMT is its ability to measure both normal and tangential contact behavior without having to separate the samples. Special attention was paid to alignment and smooth motion in order to permit testing nominally flat-on-flat contacts in the microslip regime. Examples are shown for finely resolved, undistorted hysteresis cycles with relative tangential displacement amplitudes in the sub-micrometer range at about 50 MPa nominal normal pressure, which is maintained well over the tangential load cycle.
Yet more on the circumbinary disk of SS 433
Creators: name: Bowler, M G
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The H and He emission lines of the microquasar SS 433 contain features that look very like emission from a circumbinary ring. Phenomenological models have been successful but contain certain ad hoc features. In this note the lines are treated as recombination lines from a highly ionized environment and differences between H and He, previously unexplained, are understood in terms of the different ionization potentials. It now seems inconceivable that these spectral features have origin other than in a circumbinary ring orbiting at approximately 250 km/s - in which case the system mass is approximately 40 solar masses.
description: 6 pages, 7 figures. Submitted to A & A version 1.2 (25 Aug 13) has an additional section on the radiated intensity in H alpha. This is essentially the published version (see below)
LHC Data and Aspects of New Physics
Creators: name: Alanne, Tommi
name: Di Chiara, Stefano
name: Tuominen, Kimmo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the implications of current LHC data on new physics with strongly interacting sector(s). We parametrize the relevant interaction Lagrangian and study the best fit values in light of current data. These are then considered within a simple framework of bosonic technicolor. We consider first the effective Lagrangian containing only spin-0 composites of the underlying theory, which corresponds to a two Higgs doublet model. With respect to this baseline, the effects of the vector bosons, a staple in strong interacting theories, are illustrated by considering two cases: first, the case where the effects of the vector bosons arise only through their mixing with the electroweak SU(2)_L gauge fields and, second, the case where also a direct interaction term with neutral scalars exists. We find that the case of a W' coupling to the Higgs boson only via the mixing of vector fields produces a negligible improvement in the fit of the present data, while even a small direct coupling of the composite vector fields to the Higgs allows the tested model to fit optimally the experimental results.
description: 26 pages, 5 figures. Axial-vector added to the analysis in section IV, conclusions partially change; typos corrected
Entanglement spectrum and entangled modes of random XX spin chains
Creators: name: Pouranvari, Mohammad
name: Yang, Kun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study in this work the ground state entanglement properties of finite XX spin-1/2 chains with random couplings, using Jordan-Wigner transformation. We divide the system into two parts and study reduced density matrices (RDMs) of its subsystems. Due to the free-fermion nature of the problem, the RDMs take the form of that of a free fermion thermal ensemble. Finding spectrum of the corresponding entanglement Hamiltonian and corresponding eigenvectors, and comparing them with real space renormalization group (RSRG) treatment, we establish the validity of the RSRG approach for entanglement in the limit of strong disorder, but also find its limitations when disorder is weak. In the latter case our work provides a way to visualize the "effective spins" that form long distance singlet pairs.
description: 9 pages, 10 figures, 1 figure updated
Multicomponent synthesis of novel thiazolo[3,2-a]pyridin-8-yl-phosphonates as a model of plant growth regulator
Creators: name: Altuğ, Cevher
name: Saleh, Lange Yakubu
name: Caner, Esra
name: Güneş, Hanife
name: Sameeullah, Muhammad
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Plant Biology
subject: 60506 Virology

description: A series of thiazolo[3,2-a]pyridin-8-yl-phosphonate derivatives have been obtained by the reaction of diethyl (E)-((4-oxothiazolidin-2-ylidene)methyl)phospohonate, malononitrile and two equivalent of various aromatic aldehydes in a multicomponent reaction with good yields. The structures of the new compounds are confirmed by spectroscopic methods (IR, 1H, 13C, 31P NMR and HRMS). Compound diethyl-(Z)-(5-amino-6-cyano-2-(4-nitrobenzylidene)-7-(4-nitrophenyl)-3-oxo-3,7-dihydro-2H-thiazolo[3,2-a]pyridin -8-yl)phosphonate (4k) at 1 mM concentration enhanced biomass plant height, number of branches and leaf area of tomato plants of at least two-fold compared to the control plants. In common bean plants, this compound enhanced the chlorophyl content and delayed senescence in comparison to the control plants. Therefore, in future studies, the compound(s) would be further tested to evaluate deeply their mode of action at physiological, biochemical and molecular level to finally enhance crop productivity of various plants.
One-pot synthesis, theoretical study and antimicrobial activity of 5,5′-(1,4-phenylenebis-(methanylylidene))Bis(3-Aryl(Alkyl)-2-thioxoimidazolidin-4-one) derivatives
Creators: name: Shaker, Raafat M.
name: El-Naby, Hisham A. Abd
name: Ahmed, Essam Kh.
name: Ibrahim, Mahmoud A. A.
name: Gedamy, Sageda A.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified

description: A simple, facile, and convenient practical method for the one-pot synthesis of pharmaceutically interesting 5,5`-(1,4-phenylenebis-(methanylylidene))bis-thiohydantoins via a three-component condensation reaction of terephthalaldehyde, α-amino acids and isothiocyanates had been developed. The S-alkylated derivatives 6a and 6b were obtained by the alkylation of the bis-thiohydantoins 4a with methyl iodide and/or benzyl chloride in a basic media. The molecular structures of the synthesized compounds were confirmed by their elemental analyses and spectral data (IR, 1H, 13C NMR and MS). The assignment of more stable Z- or E-isomers as the major form of 4a, 6a, and 8a was investigated by DFT calculations at B3LYP/6-31+G* level. Some of the prepared compounds were screened for their in-vitro antimicrobial activity. Compounds 4a, 6 b, 8 b and 8c exhibited low antibacterial activity against gram-positive bacteria Bacillus cereus. (5Z,5′Z)-5,5′-(1,4-Phenylenebis(methanylylidene))bis(3-benzyl-2-thioxoimidazolidin-4-one) (4b) exhibited good fungicidal activity against Fusarium oxysporum.
Senckenberg Policy Brief - Diving through the darkness; Species information is vital for effective marine conservation
Creators: name: Kaiser, Stefanie
name: Sigwart, Julia
name: Niamir, Aidin
name: Saeedi, Hanieh
name: Chen, Chong
name: Hilário, Ana
name: Horton, Tammy
name: Howel, Kerry
name: Levin, Lisa
name: Osborn, Karen
name: Brandt, Angelika
Publisher: name: Zenodo
Year: 2022

description: World leaders and representatives of 196 contracting states are joining the 15th Conference of the Parties (COP15) to the Convention on Biological Diversity (CBD) in Montréal to discuss strategies to stem global biodiversity loss. Worldwide, one million species are currently threatened with extinction from increasing anthropogenic impacts. Recently discovered species are predicted to have unusually high risks of extinction; many of these occur in biodiversity-rich marine environments such as coral reefs and the deep sea. Conservation of deep-sea species found in “areas beyond national jurisdiction” is particularly Above: Diversity brought to light during a single deep-sea sampling campaign - the recent Aleut-Bio expedition to the Aleutian Trench on board RV Sonne (species not shown to scale). challenging because we know very little about them, and there is not yet an international framework to guide the implementation of conservation measures. Deep-sea ecosystems form the largest realm on Earth that harbour a vast number of species, but remain least explored. The deep sea and its unique and rich biodiversity play a key role in ecosystem services, such as food supply or regulating global climate by absorbing heat and sequestrating carbon dioxide from the atmosphere. However, scientists estimate that about 90% of species in the oceans are not yet discovered or have no name. We urge decision makers to further support species discovery, including deep-sea exploration activities. Protection of undescribed biodiversity must work alongside efforts to increase species information to ensure effective marine conservation.