cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Statistical approach to dislocation dynamics: From dislocation correlations to a multiple-slip continuum plasticity theory
Creators: name: Limkumnerd, Surachate
name: Van de Giessen, Erik
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Due to recent successes of a statistical-based nonlocal continuum crystal plasticity theory for single-glide in explaining various aspects such as dislocation patterning and size-dependent plasticity, several attempts have been made to extend the theory to describe crystals with multiple slip systems using ad-hoc assumptions. We present here a mesoscale continuum theory of plasticity for multiple slip systems of parallel edge dislocations. We begin by constructing the Bogolyubov-Born-Green-Yvon-Kirkwood (BBGYK) integral equations relating different orders of dislocation correlation functions in a grand canonical ensemble. Approximate pair correlation functions are obtained for single-slip systems with two types of dislocations and, subsequently, for general multiple-slip systems of both charges. The effect of the correlations manifests itself in the form of an entropic force in addition to the external stress and the self-consistent internal stress. Comparisons with a previous multiple-slip theory based on phenomenological considerations shall be discussed.
description: 12 pages, 3 figures
Generalized perfect numbers
Creators: name: Bege, Antal
name: Fogarasi, Kinga
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A25, 11Y70

description: In this paper some new ways of generalizing perfect numbers are investigated, numerical results are presented and some conjectures are established.
Valuation of Human Health: An Integrated Model of Willingness to Pay for Mortality and Morbidity Risk Reductions
Creators: name: Gerking, Shelby
name: Dickie, Mark
name: Veronesi, Marcella
name: Gerking, Shelby
name: Dickie, Mark
name: Veronesi, Marcella
Publisher: name: Unknown
Year: 2012
Subjects: subject: Health Economics and Policy
subject: willingness to pay
subject: children
subject: environmental hazards
subject: health
subject: integrated analysis
subject: morbidity
subject: mortality
subject: value of a statistical life
subject: cancer
subject: stated preference

description: This paper develops and applies an integrated model of human mortality and morbidity valuation that is consistent with principles of welfare economics. The standard expected utility model of one person facing two health states (alive and dead) is extended to a setting in which two family members (a parent and a child) face three health states (healthy, sick, and dead). A key finding is that total health benefits of public programs equate to the sum of willingness to pay for reduced mortality risk plus a fraction of the willingness to pay for reduced morbidity risk. Implications of the integrated model are tested using two field data sets from the U.S. on skin cancer and leukemia risk reductions. Results obtained show how the integrated model can be used to increase the accuracy of health benefit estimation for benefit-cost analyses as well as for the design of public hazard reduction programs.
Track-aligned Extents: Matching Access Patterns to Disk Drive Characteristics (CMU-CS-01-119)
Creators: name: Jiri  Schindler
name: Griffin, John Linwood
name: Lumb, Christopher R.
name: Ganger, Gregory R.
Publisher: name: Carnegie Mellon University
Year: 2002
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Track-aligned extents (traxtents) utilize disk-specific knowledge to match access patterns to the strengths of modern disks. By allocating and accessing related data on disk track boundaries, a system can avoid most rotational latency and track crossing overheads. Avoiding these overheads can increase disk access efficiency by up to 50% for mid-sized requests (100-500 KB). This paper describes traxtents, algorithms for detecting track boundaries, and some uses of traxtents in file systems and video servers. For large-file workloads, a version of FreeBSD’s FFS implementation that exploits traxtents reduces application run times by up to 20% compared to the original version. A video server using traxtent-based requests can support 56% more concurrent streams at the same startup latency and buffer space. For LFS, 44% lower overall write cost for track-sized segments can be achieved.
Mesoporous ZnCr2O4 Nanocatalyst with High Specific Surface Area for Facile Synthesis of Flavonoid Derivatives
Creators: name: Amiri, Behnam
name: Nazarpour, Roya
name: Mohave, Fouad
name: Ghaemi, Arezoo
name: Tavakkoli, Haman
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: ZnCr2O4 nanoparticles with a high specific surface area have been fabricated using a hydrothermal synthetic process and were used as an effective catalyst to synthesize flavonoid derivatives. The textural and structural properties of the spinel were studied by X-ray diffraction (XRD), Field Emission scanning electron microscope (FE-SEM), nitrogen sorption techniques, and Fourier transform infrared spectroscopy (FT-IR). XRD confirmed the formation of cubic Zinc Chromite spinel with a small crystallite size of 5.04 nm. While Transmission Electron Microscopy (TEM) illustrated the particle size of ∼8, 10, and 16 nm. Textural analysis by N2 sorption revealed a mesoporous system with a high specific surface of 215 m2/g for ZnCr2O4. Moreover, all desired flavonoids were obtained in high yields under solvent-free conditions with the aid of the ZnCr2O4 catalyst. Structures of all flavonoid derivatives were confirmed by 1H-NMR, 13C-NMR, FT-IR, and their melting points.
High Resolution Optical Spectroscopy of the F Supergiant Proto-Planetary Nebula V887 Her=IRAS 18095+2704
Creators: name: Sahin, Timur
name: Lambert, David L.
name: Klochkova, Valentina G.
name: Tavolganskaya, N. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An abundance analysis is presented for IRAS 18095+2704 (V887 Her), a post-AGB star and proto-planetary nebula. The analysis is based on high-resolution optical spectra from the McDonald Observatory and the Special Astrophysical Observatory. Standard analysis using a classical Kurucz model atmosphere and the line analysis program MOOG provides the atmospheric parameters: Teff = 6500 K, log g = +0.5, and a microturbulent velocity Vt = 4.7 km/s and [Fe/H] = -0.9. Extraction of these parameters is based on excitation of FeI lines, ionization equilibrium between neutral and ions of Mg, Ca, Ti, Cr, and Fe, and the wings of hydrogen Paschen lines. Elemental abundances are obtained for 22 elements and upper limits for an additional four elements. These results show that the star's atmosphere has not experienced a significant number of C- and s-process enriching thermal pulses. Abundance anomalies as judged relative to the compositions of unevolved and less-evolved normal stars of a similar metallicity include Al, Y, and Zr deficiencies with respect to Fe of about 0.5 dex. Judged by composition, the star resembles a RV Tauri variable that has been mildly affected by dust-gas separation reducing the abundances of the elements of highest condensation temperature. This separation may occur in the stellar wind. There are indications that the standard 1D LTE analysis is not entirely appropriate for IRAS 18095+2704. These include a supersonic macroturbulent velocity of 23 km/s, emission in H-alpha and the failure of predicted profiles to fit observed profiles of H-beta and H-gamma.
description: Accepted for publication in MNRAS
TREX : an innovative view of HPC usage applied to Quantum Monte Carlo simulations
Creators: name: Scemama, Anthony
name: de Oliveira Castro, Pablo
name: Valensi, Cedric
name: Jalby, William
Publisher: name: Zenodo
Year: 2021

description: TREX : an innovative view of HPC usage applied to Quantum Monte Carlo simulations
 The TREX[1] European Center of Excellence focuses on high accuracy quantum
 mechanical methods, essential in many different fields of application such as
 new material design or photochemistry. Among these methods, Quantum Monte Carlo
 (QMC) approaches are particularly well adapted to exascale architectures.
 Our ambition is to the help the community take advantage of exascale machines
 through the use of our HPC software. We will review in the presentation progress along the three following axes: * TREXIO[2]: A common I/O library and file format for easily exchanging data between
 applications, facilitating high-throughput computing workflows, * QMCkl[3]: A library of computational kernels specific to QMC applications
 written together by QMC and HPC experts, taking advantage of both CPUs and GPUs, * An integrated workflow including performance analysis (MAQAO[4]) and numerical
 accuracy measurements (Verificarlo[5]) to be used for the development of QMC
 kernels and more generally for improving the applications. In particular, we
 plan to identify the best performance usage of QMCkl and also to adjust the
 performance with numerical precision requirements. ------------------------------------ [1] https://trex-coe.eu
 [2] https://github.com/trex-coe/trexio
 [3] https://trex-coe.github.io/qmckl
 [4] https://www.maqao.org
 [5] https://github.com/verificarlo ------------------------------------
Kinematic structure of the atmosphere and envelope of the post-AGB star HD56126
Creators: name: Klochkova, Valentina
name: Chentsov, Eugenij
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of an analysis of the optical spectrum of the post-AGB star HD56126 (IRAS 07134+1005) based on observations made with the echelle spectrographs of the 6-m telescope with spectral resolutions of R=25000 and 60000 at 4012-8790 AA. The profiles of strongest lines (HI; FeII, YII, BaII absorptions, etc.) formed in the expanding atmosphere at the base of the stellar wind have complex and variable shapes. To study the kinematics of the atmosphere, the velocities of individual features in these profiles must be measured. Differential line shifts of up to Vr=15-30 km/s have been detected from the lines of metals and molecular features. The star's atmosphere simultaneously contains both expanding layers and layers falling onto the star. A comparison of the data for different times demonstrates that both the radial velocity and the velocity pattern in whole are variable. The position of the molecular spectrum is stable, implying stability of the expansion velocity of the circumstellar envelope around HD56126 detected in observations in the C_2 and NaI lines.
description: 16 pages, 7 figures, 1 table
On sequences of Toeplitz matrices over finite fields
Creators: name: Price, Geoffrey
name: Wortham, Myles
Publisher: name: arXiv
Year: 2018
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 15A33 (Primary) 15A57 (Secondary)

description: For each non-negative integer $n$ let $\mathcal{A}_n$ be an $n+1$ by $n+1$ Toeplitz matrix over a finite field, $F$, and suppose for each $n$ that $\mathcal{A}_n$ is embedded in the upper left corner of $\mathcal{A}_{n+1}$. We study the structure of the sequence $ν= \{ν_n :n \in \mathbb{Z}^+\}$, where $ν_n = \text{null}(\mathcal{A}_n)$ is the nullity of $\mathcal{A}_{n}$. For each $n\in \mathbb{Z}^+$ and each nullity pattern $ν_0,ν_1,\dots,ν_n$, we count the number of strings of Toeplitz matrices $\mathcal{A}_0,\mathcal{A}_1,\dots,\mathcal{A}_{n}$ with this pattern. As an application we present an elementary proof of a result of D. E. Daykin on the number of $n\times n$ Toeplitz matrices over $GF(2)$ of any specified rank. (This is a corrected version of the paper published in Linear Algebra and Its Applications $561$ \, $(2019), 63-80$.) 2000 MSC Classification 15A33, 15A57
description: This manuscript replaces 1804.00983 which was submitted to Linear Algebra and Its Applications. In a revised form the paper was accepted by LAA. Errors in Theorems 10 and 11 in the published article are corrected here
Synthesis Anticonvulsant and Cytotoxic Evaluation of Benzimidazole-Quinoline Hybrids Schiff Base Analogs
Creators: name: Tiglani, Devleena
name: Salahuddin
name: Mazumder, Avijit
name: Kumar, Rajnish
name: Yar, Mohammad Shahar
name: Ahsan, Mohamed Jawed
name: Shabana, Km
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Both, benzimidazole and quinoline pharmacophores have shown various activities against cancer, tuberculosis, malaria, fungal, viral, and bacterial infections. These moieties are considered highly potent nuclei in medicinal chemistry. Thus, this research work aims to produce a synergistic effect involving both nuclei in a single structure. A Series of literature work resulted in the synthesis of novel derivatives of 2‐(1H‐1,3‐benzothiazole‐2‐yl)‐N'‐substituted quinoline‐4‐carbohydrazide 5a–q using a multiple-step reaction. Characterization of all compounds was successfully done using IR and 1HNMR, 13CNMR as well as elemental analysis. Furthermore, screening of all synthesized compounds has been shown a positive response as an anticonvulsant and antidepressant activity in mice. Compounds 5b, 5h, 5l, and 5n have shown potentially active on pentylenetetrazole-induced seizures in mice. The synthesized compounds were also screened on a panel of 60 cell lines by the National Cancer Institute according to standard screening protocol. Ten compounds were selected and evaluated via a single high dose (10−5 M). In a one-dose assay, compounds 5j and 5o showed the highest activity on leukemia (CCRF-CEM) and renal cancer (A498) with growth inhibition (GI) of 70.91 and 61.15%.
An indefinite nonlinear problem in population dynamics: high multiplicity of positive solutions
Creators: name: Feltrin, Guglielmo
name: Sovrano, Elisa
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34B08, 34B15, 34B18

description: Reaction-diffusion equations have several applications in the field of population dynamics and some of them are characterized by the presence of a factor which describes different types of food sources in a heterogeneous habitat. In this context, to study persistence or extinction of populations it is relevant the search of nontrivial steady states. Our paper focuses on a one-dimensional model given by a parameter-dependent equation of the form $u'' + \bigl{(} λa^{+}(t)-μa^{-}(t) \bigr{)}g(u) = 0$, where $g\colon \mathopen{[}0,1\mathclose{]} \to \mathbb{R}$ is a continuous function such that $g(0)=g(1)=0$, $g(s) > 0$ for every $0
description: 26 pages, 13 PDF figures
India's Contribution to Arab mathematics
Creators: name: Jaouiche, Khalil
Publisher: name: arXiv
Year: 2010
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics

description: This paper was presented at the Colloque de Saint-Denis de la Reunion, November 3-7, 1997, and published in the book L'Océan Indien au carrefour des mathématiques arabes, chinoises, européennes et indiennes (pp. 211-223), Tournès, Dominique (ed.), Saint-Denis, Réunion, I.U.F.M. de La Réunion, 1998. The article is an introductory survey of the in?uence of India on the mathematics of the Islamic world.
description: 13 pages
Towards Self-Predicting Systems: What if You Could Ask “What-if”? (CMU-PDL-05-101)
Creators: name: Thereska, Eno
name: Dushyanth  Narayanan
name: Ganger, Gregory R.
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Today, management and tuning questions are approached using if...then... rules of thumb. This reactive approach requires expertise regarding of system behavior, making it difficult to deal with unforeseen uses of a system’s resources and leading to system unpredictability and large system management overheads. We propose a What...if... approach that allows interactive exploration of the effects of system changes, thus converting complex tuning problem into simpler search problems. Through two concrete management problems, automating system upgrades and deciding on service migrations, we identify system design changes that enable a system to answer What...if... questions about itself.
The Late Mesozoic-Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling
Creators: name: Stein, Ruediger
Publisher: name: FID GEO
Year: 2019

description: Over the past 3–4 decades, coincident with global warming and atmospheric CO2 increase, Arctic sea ice has significantly decreased in its extent as well as in thickness. When extrapolating this alarming trend, the central Arctic Ocean might become ice-free during summers within about the next 2–5 decades. Paleoclimate records allow us to better understand the processes controlling modern climate change and distinguish between natural and anthropogenic forcing. In this context, detailed studies of the earlier Earth history characterized by a much warmer global climate with elevated atmospheric CO2 concentrations are important. The main focus of this review paper is the long-term late Mesozoic-Cenozoic Arctic Ocean climate history from Greenhouse to Icehouse conditions, with special emphasis on Arctic sea ice history. Starting with some information on the Cretaceous Arctic Ocean climate, this paper will concentrate on selected results from Integrated Ocean Drilling Program (IODP) Expedition 302 (Arctic Ocean Coring Expedition (ACEX)), the first scientific drilling in the permanently ice-covered Arctic Ocean, dealing with the Cenozoic climate history. While these results from ACEX were unprecedented, key questions related to the Cenozoic Arctic climate history remain unanswered, largely due to the major mid-Cenozoic hiatus (if existing) and partly to the poor recovery of the ACEX record. Following-up ACEX and its cutting-edge science, a second scientific drilling on Lomonosov Ridge with a focus on the reconstruction of the continuous and complete Cenozoic Arctic Ocean climate history has currently been proposed and scheduled as IODP Expedition 377 for 2021.
Fe3O4@Diamine-CuI Nanocomposite: A Novel and Highly Reusable Nanomagnetic Catalyst for Ecofriendly Synthesis of Triaryl Imidazoles
Creators: name: Jabbar, Abdullah Hasan
name: Mezan, Salim Oudah
name: Alameri, Ameer A.
name: Prakaash, A. S.
name: Al-Dhalimy, Aiman Mohammed Baqir
name: Younes, Ahmad
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biophysics
Biochemistry
Physical Sciences not elsewhere classified
Biotechnology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified

description: Molecules that have an imidazole ring in their structure show different biological effects, the most important of which are antifungal, antibacterial, and medical properties. In this paper, we reported that copper (I) iodide supported on the surface of magnetic Fe3O4 nanoparticles modified with 3,4-diaminobenzoic acid [Fe3O4@Diamine-CuI] is a new, recoverable, and highly efficient nanocatalyst for the preparation of 2,4,5-trisubstituted imidazoles through the one-pot three-component reaction of aromatic aldehydes with benzil and ammonium acetate as the nitrogen source at refluxing water. The structure of the as-constructed Fe3O4@Diamine-CuI nanomaterial is well characterized by FT-IR spectroscopy, SEM, EDX, TEM, XRD, VSM, EDX elemental mapping, and ICP-OES techniques. It is worth mentioning that the Fe3O4@Diamine-CuI nanocatalyst was easily separated from the reaction medium using a magnetic magnet and could be reused for 8 times without reducing its catalytic activity. The advantages of this catalytic system include ecofriendly conditions, easy separation of the catalyst, ability to recycle the catalyst, low cost, very short reaction time, water as the solvent, and simple purification of the products.
Ballistic electron channels including weakly protected topological states in delaminated bilayer graphene
Creators: name: Lane, T. L. M.
name: Anđelković, M.
name: Wallbank, J. R.
name: Covaci, L.
name: Peeters, F. M.
name: Fal'ko, V. I.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that delaminations in bilayer graphene (BLG) with electrostatically induced interlayer asymmetry can provide one with ballistic channels for electrons with energies inside the electrostatically induced BLG gap. These channels are formed by a combination of valley-polarised evanescent states propagating along the delamination edges (which persist in the presence of a strong magnetic field) and standing waves bouncing between them inside the delaminated region (in a strong magnetic field, these transform into Landau levels in the monolayers). For inverted stacking between BLGs on the left and right of the delamination (AB-2ML-BA or BA-2ML-AB), the lowest energy ballistic channels are gapless, have linear dispersion and appear to be weakly topologically protected. When BLG stacking order on both sides of the delamination is the same (AB-2ML-AB or BA-2ML-BA), the lowest energy ballistic channels are gapped, with gap $\varepsilon_g$ scaling as $\varepsilon_g\propto W^{-1}$ with delamination width and as $\varepsilon_g\proptoδ^{-1}$ with the on-layer energy difference within the delamination. Depending on their width, delaminations may also support several `higher energy' waveguide modes. Our results are based on both an analytical study of the wavematching of Dirac states and tight binding model calculations, and we analyse in detail the dependence of the delamination spectrum on electrostatic conditions in the structure, such as the vertical displacement field.
description: 12 pages, 9 figures
Vacuum - induced stationary entanglement in radiatively coupled three - level atoms
Creators: name: Derkacz, L.
name: Jakobczyk, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a pair of three - level atoms interacting with a common vacuum and analyze the process of entanglement production due to spontaneous emission. We show that in the case of closely separated atoms, collective damping can generate robust entanglement of the asymptotic states.
description: published version
A Statistical Study of the Magnetic Imprints of X-Class Solar Flares
Creators: name: Lu, Zekun
name: Cao, Weiguang
name: Jin, Gaoxiang
name: Zhang, Yining
name: Ding, Mingde
name: Guo, Yang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Magnetic imprints, the rapid and irreversible evolution of photospheric magnetic fields as a feedback from flares in the corona, have been confirmed by many previous studies. These studies showed that the horizontal field will permanently increase at the polarity inversion line (PIL) after eruptions, indicating that a more horizontal geometry of photospheric magnetic field is produced. In this study, we analyze 20 X-class flares since the launch of the Solar Dynamics Observatory (SDO) in 15 active regions (ARs) with heliographic angle no greater than 45 degrees. We observe clear magnetic imprints in 16 flares, whereas 4 flares are exceptional. The imprint regions of the horizontal field are located not only at the PIL but also at sunspot penumbra with strong vertical fields. Making use of the observed mass and speed of the corresponding coronal mass ejections (CMEs) , we find that the CMEs with larger momenta are associated with stronger magnetic imprints. Furthermore, a linear relationship, with a Kendall's Tau-b coefficient 0.54, between the CME momentum and the change of Lorentz force is revealed. Based on that, we quantify the back reaction time to be around 70 s, with a 90% confidence interval from about 50 s to 90 s.
description: 11 pages, 5 figures, 2 tables, accepted for publication on The Astrophysical Journal
title: ADCO, Quatrième cartulaire de Saint-Etienne de Dijon (XIIIe siècle), Cart. 36 (G 128), 31 folios, f. 0015
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: CG21/F.PETOT/2009
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Quatrième cartulaire de Saint-Etienne de Dijon (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 36 (G 128), 31 folios, f. 0015, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Quatrième cartulaire de Saint-Etienne de Dijon (XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 36 (G 128), 31 folios, f. 0015, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Thermokinetics and synergistic effect analysis of peat-lignite coal co-pyrolysis
Creators: name: Bakkaloğlu, Esra
name: Ceylan, Selim
name: Topcu, Yıldıray
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: In this study, the synergistic effect between peat and lignite coal was investigated in terms of kinetic energy and mass loss trends using a thermogravimetric analyzer. Thermogravimetric non-isothermal studies were conducted at different heating rates under inert nitrogen atmosphere. Kinetic analysis was performed using model-free KAS, OFW, and Starink methods and the average activation energies varied between 88.62 kJ/mol and 204.28 kJ/mol. Differential mass loss trends were determined using experimental and theoretical data. An obvious deviation was obtained at a blend ratio of PT:CL40:60. Thus, results revealed that the PT and CL co-pyrolysis has synergistic effects, especially for sample PT:CL40:60. SEM and BET analyses were performed on the coke sample of peat, coal, and PT:CL40:60 blend ratio samples for further analysis. The surface area of peat and coal was determined to be 416 m2/g and 83.06 m2/g, respectively. It was concluded that the porosity and surface area of coal (187.02 m2/g) increased with the addition of peat. The results are expected to be useful in the design of peat biomass and coal co-pyrolysis systems.
Synthesis and Antimicrobial Activity of New Carbohydrazide Bearing Quinoline Scaffolds in Silico ADMET and Molecular Docking Studies
Creators: name: Nipate, Amol S.
name: Jadhav, Chetan K.
name: Chate, Asha V.
name: Dixit, Prashant P.
name: Sharma, Prachi
name: Gill, Charansingh H.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: In search of a more potent and new series of fluorine-containing quinoline, hybrid Schiff bases (6a–o) analogues were synthesized by a facile and efficient conventional method. They were developed via condensation of quinoline-4-carbohydrazide intermediate and aromatic aldehydes in presence of ethanol. All compounds viz., 6a–o were efficiently synthesized in good yields in ranges of 76–84%, respectively. All synthesized compounds were well characterized by using various spectroscopic techniques such as FT-IR, 1H NMR, 13C NMR, Mass spectroscopy. Moreover, all newly synthesized hybrid Schiff bases (6a–o) have been screened for their antifungal and antibacterial activity. Among these compounds (6a–d) shows good antibacterial activity, while compound 6b was found to be effective against a fungal pathogen Aspergillus niger and compound 6a was found to inhibit the visible growth of Staphylococcus aureus ATCC 6538 at low concentration with MIC 340 µg/.
title: DETECTION OF NITRIC-OXIDE IN THE DARK CLOUD L134N
Creators: name: MCGONAGLE, D
name: ZIURYS, LM
name: Irvine, William M.
name: MINH, YC
Publisher: name: University of Massachusetts Amherst
Year: 1990
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://adsabs.harvard.edu/full/1990ApJ...359..121M
description: The first detection of interstellar nitric oxide (NO) in a cold dark cloud, L134N is reported. Nitric oxide was observed by means of its two 2 Pi 1/2, J = 3/2 - 1/2, rotational transitions at 150.2 and 150.5 GHz, which occur because of Lambda-doubling. The inferred column density for L134N is about 5 x 10 to the 14th/sq cm toward the SO peak in that cloud. This value corresponds to a fractional abundance relative to molecular hydrogen of about 6 x 10 to the -8th and is in good agreement with predictions of quiescent cloud ion-molecule chemistry. NO was not detected toward the dark cloud TMC-1 at an upper limit of 3 x 10 to the -8th or less.
Local quasiparticle density of states of superconducting SmFeAsO$1-x$F$x$ single crystals: Evidence for spin-mediated pairing
Creators: name: Fasano, Y.
name: Maggio-Aprile, I.
name: Zhigadlo, N. D.
name: Katrych, S.
name: Karpinski, J.
name: Fischer, Ø.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We probe the local quasiparticles density-of-states in micron-sized SmFeAsO$_{1-x}$F$_{x}$ single-crystals by means of Scanning Tunnelling Spectroscopy. Spectral features resemble those of cuprates, particularly a dip-hump-like structure developed at energies larger than the gap that can be ascribed to the coupling of quasiparticles to a collective mode, quite likely a resonant spin mode. The energy of the collective mode revealed in our study decreases when the pairing strength increases. Our findings support spin-fluctuation-mediated pairing in pnictides.
description: 11 pages, 4 figures
Enhanced third-order optical nonlinearity driven by surface-plasmon field gradients
Creators: name: Kravtsov, Vasily
name: AlMutairi, Sultan
name: Ulbricht, Ronald
name: Kutayiah, A. Ryan
name: Belyanin, Alexey
name: Raschke, Markus B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Achieving efficient nonlinear optical frequency conversion in small volumes is key for future on-chip photonic devices that would provide a higher-speed alternative to modern electronics. However, the already intrinsically low conversion efficiency severely limits miniaturization to nanoscale dimensions. Here we demonstrate that gradient-field effects can provide for an efficient, conventionally dipole-forbidden nonlinear response, offering a new approach for enhanced nonlinear optics in nanostructures. We show that a {\em longitudinal} nonlinear source current can dominate the third-order optical nonlinearity of the free electron response in gold in the technologically important near-IR frequency range where the nonlinearities due to other mechanisms are particularly small. Using adiabatic nanofocusing to spatially confine the excitation fields, from measurements of the $2ω_1 - ω_2$ four-wave mixing response as a function of detuning $ω_1 - ω_2$, we find up to $10^{-5}$ conversion efficiency with a gradient field contribution to $χ^{(3)}_{\mathrm{Au}}$ of up to $10^{-19}~\mathrm{m}^2 / \mathrm{V}^2$. The results are in good agreement with theory based on plasma hydrodynamics. Our results demonstrate an increase in nonlinear conversion efficiency with decreasing sample size that can offset and even overcompensate the volume decrease of conventional dipolar pathways. This will enable more efficient nonlinear optical devices and frequency converters and facilitate the extension of coherent multidimensional spectroscopies to the nanoscale.
description: 14 pages, 4 figures
Emergent three-dimensional sperm motility: Coupling calcium dynamics and preferred curvature in a Kirchhoff rod model
Creators: name: Carichino, Lucia
name: Olson, Sarah D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: 92B05, 74F10, 74F25, 74K10

description: Changes in calcium concentration along the sperm flagellum regulate sperm motility and hyperactivation, characterized by an increased flagellar bend amplitude and beat asymmetry, enabling the sperm to reach and penetrate the ovum (egg). The signaling pathways by which calcium increases within the flagellum are well established. However, the exact mechanisms of how calcium regulates flagellar bending are still under investigation. We extend our previous model of planar flagellar bending by developing a fluid-structure interaction model that couples the three-dimensional motion of the flagellum in a viscous, Newtonian fluid with the evolving calcium concentration. The flagellum is modeled as a Kirchhoff rod: an elastic rod with preferred curvature and twist. The calcium dynamics are represented as a one-dimensional reaction-diffusion model on a moving domain, the centerline of the flagellum. The two models are coupled assuming that the preferred curvature and twist of the sperm flagellum depend on the local calcium concentration. To investigate the effect of calcium on sperm motility, we compare model results of flagellar bend amplitude and swimming speed for three cases: planar, helical (spiral with equal amplitude in both directions), and quasi-planar (spiral with small amplitude in one direction). We observe that for the same parameters, the planar swimmer is faster and a turning motion is more clearly observed when calcium coupling is accounted for in the model. In the case of flagellar bending coupled to the calcium concentration, we observe emergent trajectories that can be characterized as a hypotrochoid for both quasi-planar and helical bending.
Towards Higher Disk Head Utilization: Extracting "Free" Bandwidth From Busy Disk Drives (CMU-CS-00-130)
Creators: name: C.  Lumb
name: J.  Schindler
name: G. R. Ganger
name: D. F. Nagle
name: E.  Riedel
Publisher: name: Carnegie Mellon University
Year: 2000
Subjects: subject: 80499 Data Format not elsewhere classified
subject: FOS: Computer and information sciences

description: Freeblock scheduling is a new approach to utilizing more of a disk's potential media bandwidth. By filling rotational latency periods with useful media transfers, 20-50% of a never-idle disk's bandwidth can often be provided to background applications with no effect on foreground response times. This paper describes freeblock scheduling and demonstrates its value with simulation studies of two concrete applications: segment cleaning and data mining. Free segment cleaning often allows an LFS file system to maintain its ideal write performance when cleaning overheads would otherwise reduce performance by up to a factor of three. Free data mining can achieve over 47 full disk scans per day on an active transaction processing system, with no effect on its disk performance.
Synthesis and antimicrobial Evaluation of Novel 2'-aryl-4-aryl-2,4'-Bisthiazole and 2'-aryl-4-Pyridyl-2,4'-Bisthiazole Derivatives as Potential Antibacterial Agents
Creators: name: Nalawade, Jitendra
name: Shinde, Abhijit
name: Abhale, Yogita K.
name: Nandurkar, Yogesh
name: Bobade, Vivek D.
name: Sarkar, Dhiman
name: Mhaske, Pravin C.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Infectious Diseases
subject: FOS: Health sciences

description: In continuation of our research work to explore bisthiazole derivatives as potential antimicrobial agents, herein we reported the synthesis of a series of novel 2'-aryl-4-aryl-2,4'-bisthiazole (7a-t) and 2'-aryl-4-pyridyl-2,4'-bisthiazole (9a-l) by cyclocondensation of 2-aryl thiazole-4-carbothioamide 5a-d with 2-bromo-1-arylethanone (6a-e) and bromo-1-(pyridin-2/3/4-yl)ethanone (8a-c), respectively. These novel candidates were evaluated in vitro for their antibacterial potential against four pathogenic bacteria, Escherichia coli (NCIM 2576), Pseudomonas flurescence (NCIM 2059), Staphylococcus aureus (NCIM 2602), and Bacillus subtilis (NCIM 2162). The synthesized compounds were also screened for their in vitro antifungal activity against Candida albicans (NCIM 3100). Among them, compounds 7b, 9d, 9 g, 9i, and 9 l exhibited excellent antibacterial activity with MIC 2.1 to 12.3 µg/mL against all tested strains. Most of the compounds reported moderate antifungal activity. The pyridine ring-substituted bisthiazole reported good to excellent antibacterial activity as compared to phenyl ring-substituted bisthiazole. The potential antibacterial activity suggested that bisthiazole derivatives could assist in the development of lead compounds to treat microbial infections.
Localization of Gauge Fields and Monopole Tunnelling
Creators: name: Dvali, G.
name: Nielsen, H. B.
name: Tetradis, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the dynamical localization of a massless gauge field on a lower-dimensional surface (2-brane). In flat space, the necessary and sufficient condition for this phenomenon is the existence of confinement in the bulk. The resulting configuration is equivalent to a dual Josephson junction. This duality leads to an interesting puzzle, as it implies that a localized massless theory, even in the Abelian case, must become confining at exponentially large distances. Through the use of topological arguments we clarify the physics behind this large-distance confinement and identify the instantons of the brane world-volume theory that are responsible for its appearance. We show that they correspond to the (condensed) bulk magnetic charges (monopoles), that occasionally tunnel through the brane and induce weak confinement of the brane theory. We consider the possible generalization of this effect to higher dimensions and discuss phenomenological bounds on the confinement of electric charges at exponentially large distances within our Universe.
description: 11 pages, 3 figures, improvements in the presentation, version to appear in Physical Review D
title: Correspondance par mail avec Martin Delaney, copie à Dominique Mathez, retransféré à Marc Olivier Girard le 12 février 2007.
Creators: name: Delaney, Martin
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: En pièce jointe, l'article de Françoise Barré-Sinoussi et de Luc Montagnier, "Historical accuracy of HIV isolation" extrait de Nature Medicine, 2003.
description: Source: http://www.calames.abes.fr/pub/ms/Calames-20193111132347720
description: created: start=2005-08-10;end=2007-02-12
Gravitational corrections to light propagation in a perturbed FLRW-universe and corresponding weak lensing spectra
Creators: name: Cuesta-Lazaro, Carolina
name: Quera-Bofarull, Arnau
name: Reischke, Robert
name: Schaefer, Bjoern Malte
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: When the gravitational lensing of the large-scale structure is calculated from a cosmological model a few assumptions enter: $(i)$ one assumes that the photons follow unperturbed background geodesics, which is usually referred to as the Born-approximation, $(ii)$ the lenses move slowly, $(iii)$ the source-redshift distribution is evaluated relative to the background quantities and $(iv)$ the lensing effect is linear in the gravitational potential. Even though these approximations are small individually they could sum up, especially since they include local effects such as the Sachs-Wolfe and peculiar motion, but also non-local ones like the Born-approximation and the integrated Sachs-Wolfe effect. In this work we will address all points mentioned and perturbatively calculate the effect on a tomographic cosmic shear power spectrum of each effect individually as well as all cross-correlations. Our findings show that each effect is at least 4 to 5 orders of magnitude below the leading order lensing signal. Finally we sum up all effects to estimate the overall impact on parameter estimation by a future cosmological weak lensing survey such as Euclid in a $w$CDM cosmology with parametrisation $Ω_\mathrm{m}$, $σ_8$,$n_\mathrm{s}$, $h$, $w_0$ and $w_\mathrm{a}$, using 5 tomographic bins. We consistently find a parameter bias of $10^{-5}$, which is therefore completely negligible for all practical purposes, confirming that other effects such as intrinsic alignments and magnification bias will be the dominant systematic source in future surveys.
Magnetic fluctuations and formation of large-scale inhomogeneous magnetic structures in a turbulent convection
Creators: name: Rogachevskii, I.
name: Kleeorin, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Magnetic fluctuations generated by a tangling of the mean magnetic field by velocity fluctuations are studied in a developed turbulent convection with large magnetic Reynolds numbers. We show that the energy of magnetic fluctuations depends on magnetic Reynolds number only when the mean magnetic field is smaller than $B_{eq} / 4 Rm^{1/4}$, where $B_{eq}$ is the equipartition mean magnetic field determined by the turbulent kinetic energy and Rm is magnetic Reynolds number. Generation of magnetic fluctuations in a turbulent convection with a nonzero mean magnetic field results in a decrease of the total turbulent pressure and may cause formation of the large-scale inhomogeneous magnetic structures even in an originally uniform mean magnetic field. This effect is caused by a negative contribution of the turbulent convection to the effective mean Lorentz force. The inhomogeneous large-scale magnetic fields are formed due to the excitation of the large-scale instability. The energy for this instability is supplied by the small-scale turbulent convection. The discussed effects might be useful for understanding the origin of the solar nonuniform magnetic fields, e.g., sunspots.
description: 16 pages, 8 Figures, Physical Review E, in press
Spectral Analysis of Sunspot Penumbrae Observed with HINODE
Creators: name: Franz, Morten
name: Schlichenmaier, Rolf
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: To investigate the penumbral plasma flow on a small scale, spectropolari- metric data of sunspots recorded by HINODE was used. Maps of Doppler velocities were created by evaluating the bisector in the line-wing, thereby visualizing the flow pattern in the low photosphere where the Evershed effect is most pronounced. In penumbrae close to the disk center, the vertical component of the Evershed flow dominates. The latter consists of a series of elongated up-flow patterns extending radially through the entire center-side penumbra at a constant azimuth. Along this structure, strong up-flows appear in concentrated patches separated by weaker up-flows or even down-flows. The strong up-flows appear at the bright heads and the umbral side of the dark-core of the filament, while the down-flows are rather located at the penumbral side of the filament. Projection effects lead to an overall red-shift of the limb- side penumbra, but the described pattern of up- and down-flows is still ascertainable.
Oxygen-isotope effect on the superconducting gap in the cuprate superconductor Y_{1-x}Pr_xBa_2Cu_3O_{7-δ}
Creators: name: Khasanov, R.
name: Strässle, S.
name: Conder, K.
name: Pomjakushina, E.
name: Bussmann-Holder, A.
name: Keller, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The oxygen-isotope (^{16}O/^{18}O) effect (OIE) on the zero-temperature superconducting energy gap Δ_0 was studied for a series of Y_{1-x}Pr_xBa_2Cu_3O_{7-δ} samples (0.0\leq x\leq0.45). The OIE on Δ_0 was found to scale with the one on the superconducting transition temperature. These experimental results are in quantitative agreement with predictions from a polaronic model for cuprate high-temperature superconductors and rule out approaches based on purely electronic mechanisms.
description: 5 pages, 3 figures
FPA-FL: Incorporating Static Fault-proneness Analysis into Statistical Fault Localization
Creators: name: Feyzi, Farid
name: Parsa, Saeed
Publisher: name: arXiv
Year: 2017
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Despite the proven applicability of the statistical methods in automatic fault localization, these approaches are biased by data collected from different executions of the program. This biasness could result in unstable statistical models which may vary dependent on test data provided for trial executions of the program. To resolve the difficulty, in this article a new fault-proneness-aware statistical approach based on Elastic-Net regression, namely FPA-FL is proposed. The main idea behind FPA-FL is to consider the static structure and the fault-proneness of the program statements in addition to their dynamic correlations with the program termination state. The grouping effect of FPA-FL is helpful for finding multiple faults and supporting scalability. To provide the context of failure, cause-effect chains of program faults are discovered. FPA-FL is evaluated from different viewpoints on well-known test suites. The results reveal high fault localization performance of our approach, compared with similar techniques in the literature.