cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 4: of Heterogeneous burden of lung disease in smokers with borderline airflow obstruction
Creators: name: Pirozzi, Cheryl
name: Gu, Tian
name: Quibrera, Pedro
name: Carretta, Elizabeth
name: Han, MeiLan
name: Murray, Susan
name: Cooper, Christopher
name: Tashkin, Donald
name: Kleerup, Eric
name: Barjaktarevic, Igor
name: Hoffman, Eric
name: Martinez, Carlos
name: Christenson, Stephanie
name: Hansel, Nadia
name: R. Graham Barr
name: Bleecker, Eugene
name: Ortega, Victor
name: Martinez, Fernando
name: Kanner, Richard
name: Paine, Robert
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Cell Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Figure S3. Venn diagram illustrating patients within the discordant group (ever-smokers with normal FEV1 and FEV1/FVCâ >â LLN but
Fractional Quantum Mechanics and Levy Path Integrals
Creators: name: Laskin, Nikolai
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The fractional quantum and statistical mechanics have been developed via new path integrals approach.
description: 8 pages, added references for section 2
CROSS-RELATIONAL INFLUENCE OF INSECTS DIVERSITY ON SCIENCE STUDENTS LEARNING OUTCOMES IN NORTH CENTRAL STATES COLLEGES OF EDUCATION, NIGERIA
Creators: name: Arowolo, Jacob, Gbemiga, PhD
name: Daramola, Olamide, Temitope
name: Olarongbe, Ganiyu, Oladimeji
name: Bello, Paul
Publisher: name: TOP Journal
Year: 2025
Subjects: Insects diversity
Learning outcomes
Physical environment
Science students

description: The cross-relational influence of terrestrial versus aquatic insects’ activities on the learning outcomes of science students in colleges of education was conducted in north central states. 3 research questions and 2 hypotheses were focused for findings. It covered 480 science students within 3 purposefully sampled colleges, checklists of insects’ Direct distribution to science students of structured questionnaire whose validity was ascertained and the reliability coefficient of .891 was computed through Cronbach Alfa was used to obtain data for this study. Data obtained from the instrument were analysed descriptively and inferentially. It was discovered among other things that, there were harmful and beneficial effects from the various interactions that existed between science students and the terrestrial as well as aquatic insects that were present within their college’s premises. This study established the possibility of adopting eco-friendly ways like; exposing insects to their natural enemies as a means of keeping their populations within ecologically permissive limits while curtailing the devastating activities of these insects even as science students co-exist harmoniously with them in the same physical environment. Recommendations made include adopting the use of natural phyto-chemicals to control the activities of insects.
สภาพแวดล้อมการทำงาน และความปลอดภัยในการทำงานของแรงงานไทยภาคเกษตรกรรมในรัฐอิสราเอล
Creators: name: วงศกร อังคะคำมูล
Publisher: name: สถาบันวิจัย จัดการความรู้ และมาตรฐานการควบคุมโรค
Year: 2560
Subjects: สภาพแวดล้อมการทำงาน
สารกำจัดศัตรูพืช
การบาดเจ็บจากการทำงาน
แรงงานไทยในรัฐอิสราเอล

description: วารสารควบคุมโรค, 43, 1, 12-24
Open groups of constraints - Integrating arbitrary involutions
Creators: name: Batalin, Igor
name: Marnelius, Robert
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A new type of quantum master equation is presented which is expressed in terms of a recently introduced quantum antibracket. The equation involves only two operators: an extended nilpotent BFV-BRST charge and an extended ghost charge. It is proposed to determine the generalized quantum Maurer-Cartan equations for arbitrary open groups. These groups are the integration of constraints in arbitrary involutions. The only condition for this is that the constraint operators may be embedded in an odd nilpotent operator, the BFV-BRST charge. The proposal is verified at the quasigroup level. The integration formulas are also used to construct a generating operator for quantum antibrackets of operators in arbitrary involutions.
description: 9 pages,Latexfile,improved text
Imperfect fluid description of modified gravities
Creators: name: Faraoni, Valerio
name: Coté, Jeremy
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Brans-Dicke-like field of scalar-tensor gravity can be described as an imperfect fluid in an approach in which the field equations are regarded as effective Einstein equations. After completing this approach we recover, as a special case, the known effective fluid for a scalar coupled nonminimally to the Ricci curvature and we describe the imperfect fluid equivalent of f(R) gravity. A symmetry of electrovacuum Brans-Dicke gravity is translated into a symmetry of the corresponding effective fluid. The discussion is valid for any spacetime geometry.
description: Added some explanation in the text, typographical errors corrected. Matches version to appear in Phys. Rev. D
How [FeFe]-hydrogenase facilitates bidirectional proton transfer
Creators: name: Senger, Moritz
name: Eichmann, Viktor
name: Laun, Konstantin
name: Heberle, Joachim
Publisher: name: Freie Universität Berlin
Year: 2019
Subjects: subject: bidirectional proton transfer
subject: metalloenzymes
subject: [FeFe]-hydrogenase
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: Hydrogenases are metalloenzymes that catalyze the conversion of protons and molecular hydrogen, H2. [FeFe]-hydrogenases show particularly high rates of hydrogen turnover and have inspired numerous compounds for biomimetic H2 production. Two decades of research on the active site cofactor of [FeFe]-hydrogenases have put forward multiple models of the catalytic proceedings. In comparison, our understanding of proton transfer is poor. Previously, residues were identified forming a hydrogen-bonding network between active site cofactor and bulk solvent; however, the exact mechanism of catalytic proton transfer remained inconclusive. Here, we employ in situ infrared difference spectroscopy on the [FeFe]-hydrogenase from Chlamydomonas reinhardtii evaluating dynamic changes in the hydrogen-bonding network upon photoreduction. While proton transfer appears to be impaired in the oxidized state (Hox), the presented data support continuous proton transfer in the reduced state (Hred). Our analysis allows for a direct, molecular unique assignment to individual amino acid residues. We found that transient protonation changes of glutamic acid residue E141 and, most notably, arginine R148 facilitate bidirectional proton transfer in [FeFe]-hydrogenases.
Prospects of Detecting Baryon and Quark Superfluidity from Cooling Neutron Stars
Creators: name: Page, Dany
name: Prakash, Madappa
name: Lattimer, James M.
name: Steiner, Andrew
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Baryon and quark superfluidity in the cooling of neutron stars are investigated. Observations could constrain combinations of the neutron or Lambda-hyperon pairing gaps and the star's mass. However, in a hybrid star with a mixed phase of hadrons and quarks, quark gaps larger than a few tenths of an MeV render quark matter virtually invisible for cooling. If the quark gap is smaller, quark superfluidity could be important, but its effects will be nearly impossible to distinguish from those of other baryonic constituents.
description: 4 pages, 3 ps figures, uses RevTex(aps,prl). Submitted to Phys. Rev. Lett
General RG Equations for Physical Neutrino Parameters and their Phenomenological Implications
Creators: name: Casas, J. A.
name: Espinosa, J. R.
name: Ibarra, A.
name: Navarro, I.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The neutral leptonic sector of the Standard Model presumably consists of three neutrinos with non-zero Majorana masses with properties further determined by three mixing angles and three CP-violating phases. We derive the general renormalization group equations for these physical parameters and apply them to study the impact of radiative effects on neutrino physics. In particular, we examine the existing solutions to the solar and atmospheric neutrino problems, derive conclusions on their theoretical naturalness, and show how some of the measured neutrino parameters could be determined by purely radiative effects. For example, the mass splitting and mixing angle suggested by solar neutrino data could be entirely explained as a radiative effect if the small angle MSW solution is realized. On the other hand, the mass splitting required by atmospheric neutrino data is probably determined by unknown physics at a high energy scale. We also discuss the effect of non-zero CP-violating phases on radiative corrections.
description: 42 pages, LaTeX, 4 PS figures
[(7-chloroquinolin-4-yl)amino]acetophenones and their copper(II) derivatives: synthesis, characterization, computational studies and antimalarial activity
Creators: name: Parra, Yonathan De J.
name: Andueza L, Felix D.
name: Ferrer M, Rosa E.
name: Bruno Colmenarez, Julia
name: Acosta, María E.
name: Charris, Jaime
name: Rosenthal, Philip J.
name: Gut, Jiri
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2019
Subjects: acetophenone
antimalarial
copper
DFT
fragmentation
quinoline

description: The synthesis of the compounds [(7-chloroquinolin-4-yl)amino]acetophenones (4, 5) and their copper(II) complexes (4a, 5a) is reported. The compounds were characterized using a wide range of spectroscopic and spectrometric techniques, such as FTIR, UV-vis, NMR, EPR, ESI-CID-MS2. The spectral results suggested that the ligand acted as chelating species coordinating the metal through the endocyclic nitrogen of the quinoline ring in both complexes, with general formulae expressed in two ways, according to the phase in which they are: [Cu(L)2Cl2] for solid phase and [Cu(L)2][2Cl] for liquid phase. The EPR study of the Cu (II) complexes indicated a probable distorted tetrahedral coordination geometry. This result was confirmed by the calculated optimized structures at the DFT/B3LYP method with the 6-31G (d,p) basis set. The characterization of the fragmentation pattern of protonated free ligands was extended here to fragments as low as m/z 43, while for coordination complexes it extends to fragments at m/z 80 and m/z 111. The antimalarial activity of the compounds was determined through three different tests: inhibitory activity against in vitro growth of Plasmodium falciparum (W2), inhibition of hemozoin formation (β-hematin) and in vitro inhibitory activity against recombinant falcipain-2, where compound 5 showed considerable activity. However, the activity of free ligands against P. falciparum was increased by complexing with the Cu (II) metal ion. The values of the HOMO-LUMO energy gap of 3.847 eV (4a) and 3.932 eV (5a) were interpreted with high chemical activity and thus, could influence on biological activity. In both compounds, the total electron density surface mapped with electrostatic potential clearly revealed the presence of high negative charge on the Cu atom. Also, this study reported the molecular docking of free ligands (4, 5) using software package ArgusLab 4.0.1. The results revealed the importance of water molecules as interaction bridges through hydrogen bonds between free ligands and β-hematin; at the same time, the hypothesis that π–π interaction between quinoline derivatives and the electronic system of hematin governs the formation of adducts was confirmed.
description: EXCLI Journal; 18:Doc962; ISSN 1611-2156
Non-Adherence to Anti-Tuberculosis Treatment And Associated Factors Among TB Patients Attending Anti-TB treatments  In Some Selected Centers In Mogadishu Somalia,2024
Creators: name: Hassan, Omar Alim
Publisher: name: Zenodo
Year: 2025
Subjects: Non-Adherence to Anti-Tuberculosis Treatment And Associated Factors Among TB Patients Attending
Anti-TB treatments In Some Selected Centers In Mogadishu Somalia,2024

description: ABSTRACT

 

Background: Tuberculosis continuous to be public health challenge around the world. Non-adherence to tuberculosis (TB) treatment is main barrier of tuberculosis treatment success rate for prevention and control of tuberculosis. Poor adherence of tuberculosis treatment may result in persistent infectious diseases, drug resistance, relapse and death.
Additional file 1 of The predictive performance of short-linear motif features in the prediction of calmodulin-binding proteins
Creators: name: Yixun Li
name: Maleki, Mina
name: Carruthers, Nicholas
name: Stemmer, Paul
name: Alioune Ngom
name: Rueda, Luis
Publisher: name: figshare
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Pharmacology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: Dataset. Dataset of 194 human CaM-binding proteins and 193 Mitochondrial proteins used in this study. (PDF 36 kb)
Existence of Resonances for the Spin-Boson-Model with Critical Coupling Function
Creators: name: Reker, Jana
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A two-level atom coupled to the quantized radiation field is studied. In the physical relevant situation, the coupling function modeling the interaction between the two component behaves like $|k|^{-1/2}$, as the photon momentum tends to zero. This behavior is referred to as critical, as it constitutes a borderline case. Previous results on non-existence state that, in the general case, neither a ground state nor a resonance exists. Hasler and Herbst have shown [10], however, that a ground state does exist if the absence of self-interactions is assumed. Bach, Ballesteros, Könenberg, and Menrath have then explicitly constructed the ground state this specific case [2] using the multiscale analysis known as Pizzo's Method [13]. Building on this result, the existence of resonances is considered. In the present paper, using multiscale analysis, a resonance eigenvalue of the complex deformed Hamiltonian is constructed. Neumann series expansions are used in the analysis and a suitable Feshbach-Schur map controls the exponential decay of the terms in the series.
Excavations in Compound A, Casa Grande National Monument 1963
Creators: name: Steen, Charlie R.
Year: 1963
Subjects: subject: Classic Period
valueUri: https://core.tdar.org/browse/temporal-keyword/125/classic-period
subject: Hohokam
valueUri: https://core.tdar.org/browse/culture-keyword/21/hohokam
subject: Great House / Big House
valueUri: https://core.tdar.org/browse/site-type/317/great-house-big-house
subject: Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/256/domestic-structures
subject: Plaza
valueUri: https://core.tdar.org/browse/site-type/331/plaza
subject: Shell
valueUri: https://core.tdar.org/browse/material-type/14/shell
subject: Ceramic
valueUri: https://core.tdar.org/browse/material-type/1/ceramic
subject: Ground Stone
valueUri: https://core.tdar.org/browse/material-type/7/ground-stone
subject: Architectural Documentation
valueUri: https://core.tdar.org/browse/investigation-type/16/architectural-documentation
subject: Archaeological Overview
valueUri: https://core.tdar.org/browse/investigation-type/1/archaeological-overview
subject: Data Recovery / Excavation
valueUri: https://core.tdar.org/browse/investigation-type/5/data-recovery-excavation

description: This document is a 1963 report by Charlie Steen. It includes sketches and maps of Compound A illustrating both the outer buildings and the Great House along with charts and photographs about the artifacts found during excavation. It discusses the damage done by previous archaeologists and superintendents to the plaza in terms of future archaeology efforts and the inability to capture information going forward.
Sima mocquerysi André, 1890, nov. sp.
Creators: name: André, E.
Publisher: name: Zenodo
Year: 1890
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Hexapoda
Hymenoptera
Formicidae
Sima
Sima mocquerysi

description: Sima Mocquerysi nov. sp.
Ouvriere: Tete rectangulaire, plus longue que large, a cotes paralleles; yeux assez grands, situes un peu plus pres du bord posterieur de la tete que de son extremite anterieure; ocelles tres distincts, sauf l'anterieur qui est plus ou moins obsolete. Mandibules finement et longitudinalement striees, munies de 4 a 5 dents dont l'anterieure est assez longue et pointue. Epistome non avance et tres finement crenele au milieu de son bord anterieur. Thorax presque plan eu dessus: son profil dorsal a peu pres rectiligne, vu de cote. Pronotum nettement borde et carene lateralement; metanotum assez distinctement borde mais non carene. Pronotum un peu plus long que large, retreci en arriere; mesonotum tres court, en forme de croissant ou de bourrelet transversal, saillant et separe des deux segments voisins par des sutures profondes et nettement marquees. Face declive du metanotum oblique, peu convexe, rejoignant la face basale par une surface largement arquee. Premier n oe ud du petiole obtusement triquetre, elargi en arriere, courtement pedicule, haut et tres convexe dans le sens longitudinal quand il est examine de cote; second n oe ud pyriforme, plus grand que le premier, mais plus bas et moins convexe.
Tete densement reticulee-ponctuee et peu luisante ainsi que le thorax qui est plus irregulierement reticule; petiole et abdomen superficiellement reticules, presque lisses et luisants. Tout le corps revetu d'une pubescence jaunatre, fine, courte et peu serree, plus longue et plus abondante sur l'abdomen. Pilosite rare, nulle sur les antennes et les pattes; bord anterieur de l'epistome cilie de longs poils.
Entierement noire ou d'un brun noir tres fonce, bord anterieur de la tete rougeatre, mandibules (sauf l'extremite des dents), antennes, articulations des pattes, tibias et tarses d'un jaune un peu rougeatre, cuisses brunatres, tibias posterieurs parfois en partie assombris. - Long. 6 mill.
Parait voisine de S. Sahlbergii Forel, mais bien distincte par la presence des ocelles, par son pronotum lateralement carene, son metanotum non gibbeux, sa taille plus grande et ses antennes entierement d'un jaune rougeatre.
description: Published as part of André, E., 1890, Matériaux pour servir a la faune myrmécologique de Sierra-Leone (Afrique occidentale)., pp. 311-327 in Revista de Entomologia 9 on page 319
EMC effect in the next-to-leading order approximation based on the Laplace transformation
Creators: name: Sheibani, Javad
name: Mirjalili, Abolfazl
name: Tehrani, S. Atashbar
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, using Laplace transformation , an analytical solution is obtained for the DGLAP evolution equation at the next-to-leading order of perturbative QCD. The technique is also employed to extract, in the Laplace $s$-space, an analytical solution for the nuclear structure function, $F_2^A(x, Q^2)$. Firstly, the results for separate nuclear parton distributions for all parton types are presented which include valence quark densities, the anti-quark and strange sea PDFs and finally the gluon distribution. Based on the Laplace transformation, the obtained parton distribution functions and the nuclear structure function in the $x$-space are compared with the results from the [Phys.\ Rev.\ C series 86, 064301 (2012)] model. Our calculations are in good agreement with the available DIS experimental data as well as theoretical models which contain both small and large values of $x$-Bjorken variable. We compare our nuclear PDFs sets with those from other recent collaborations, in particular with the [ nCTEQ15 ] and [ HKN07] sets. The comparison between our results and those from the literature indicates a good agreement .
description: 12 Pages,11 figures
title: PP_1959-1960_Exercice_Colonne
Creators: name: Panerai, Philippe
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2024
Subjects: subject: enseignement
subject: Atelier Arretche
subject: architecture
subject: beaux-arts
subject: Écoles des beaux-arts

description: Travaux scolaires de Philippe Panerai à l'École des beaux-arts.
Searching for Sub-Second Stellar Variability with Wide-Field Star Trails and Deep Learning
Creators: name: Thomas, David
name: Kahn, Steven M
Publisher: name: arXiv
Year: 2018
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a method that enables wide field ground-based telescopes to scan the sky for sub-second stellar variability. The method has operational and image processing components. The operational component is to take star trail images. Each trail serves as a light curve for its corresponding source and facilitates sub-exposure photometry. We train a deep neural network to identify stellar variability in wide-field star trail images. We use the Large Synoptic Survey Telescope (LSST) Photon Simulator to generate simulated star trail images and include transient bursts as a proxy for variability. The network identifies transient bursts on timescales down to 10 milliseconds. We argue that there are multiple fields of astrophysics that can be advanced by the unique combination of time resolution and observing throughput that our method offers.
Additional file 1: of “Stroke - 65 Plus. Continued Active Life”: a study protocol for a randomized controlled cross-sectoral trial of the effect of a novel self-management intervention to support elderly people after stroke
Creators: name: Pallesen, Hanne
name: Næss-Schmidt, Erhard
name: Kjeldsen, Simon
name: Sedsel Pedersen
name: Sørensen, Susanne
name: Brunner, Iris
name: Nielsen, Jørgen
Publisher: name: figshare
Year: 2018
Subjects: Medicine
Developmental Biology
Science Policy

description: SPIRIT 2013 Checklist: Recommended items to address in a clinical trial protocol and related documents*. (DOC 121 kb)
Additional file 1: of Addressing the needs of terminally-ill patients in Bosnia-Herzegovina: patientsâ perceptions and expectations
Creators: name: S. Aebischer Perone
name: R. Nikolic
name: R. Lazic
name: E. Dropic
name: T. Vogel
name: B. Lab
name: S. Lachat
name: P. Hudelson
name: C. Matis
name: S. Pautex
name: F. Chappuis
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Interview guide. Questionnaire used to assess patientâ s perceptions, needs and expectations. (DOCX 131Â kb)
Connections between Dynamical and Renormalization Group Techniques in Top Condensation Models
Creators: name: Blumhofer, Andreas
name: Dawid, Richard
name: Lindner, Manfred
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Predictions for the ratio $M_W/m_t$ arise in top condensation models from different methods. One type of prediction stems from Pagels--Stokar relations based on the use of Ward Identities in the calculation of the \GB decay constants and expresses $M_W$ in terms of integrals containing the dynamically generated mass function $Σ_t(p^2)$. Another type of prediction emerges from the renormalization group equations via infrared quasi--fixed--points of the running top quark Yukawa coupling. We demonstrate in this paper that in the limit of a high cutoff these two methods lead to the same predictions for $M_W/m_t$ and $M_W/M_H$ in lowest loop order.
description: Slightly revised version. LaTeX and uuencoded, packed Postscript figures. The complete paper, including figures, is also available via WWW at the following http URL http://www.physik.tu-muenchen.de/tumphy/d/T30d/PAPERS/TUM-HEP-216-95.ps.gz
On Second-Quantized Open Superstring Theory
Creators: name: Johnson, Clifford V.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The SO(32) theory, in the limit where it is an open superstring theory, is completely specified in the light-cone gauge as a second-quantized string theory in terms of a ``matrix string'' model. The theory is defined by the neighbourhood of a 1+1 dimensional fixed point theory, characterized by an Abelian gauge theory with type IB Green-Schwarz form. Non-orientability and SO(32) gauge symmetry arise naturally, and the theory effectively constructs an orientifold projection of the (weakly coupled) matrix type IIB theory (also discussed herein). The fixed point theory is a conformal field theory with boundary, defining the free string theory. Interactions involving the interior of open and closed strings are governed by a twist operator in the bulk, while string end-points are created and destroyed by a boundary twist operator.
description: 20 pages,in harvmac.tex `b' mode; epsf.tex for 12 figures
Evolution of Stellar Collision Products in Globular Clusters -- I. Head-on Collisions
Creators: name: Sills, Alison
name: Lombardi, James C.
name: Bailyn, Charles D.
name: Demarque, Pierre
name: Rasio, Frederic A.
name: Shapiro, Stuart L.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the evolution of collisionally merged stars in the blue straggler region of the HR diagram. The starting models for our stellar evolution calculations are the results of the smoothed particle hydrodynamics (SPH) simulations of parabolic collisions between main sequence stars performed by Lombardi, Rasio and Shapiro (1996). Since SPH and stellar evolution codes employ different and often contradictory approximations, it is necessary to treat the evolution of these products carefully. The mixture and disparity of the relevant timescales (hydrodynamic, thermal relaxation and nuclear burning) and of the important physical assumptions between the codes makes the combined analysis of the problem challenging, especially during the initial thermal relaxation of the star. In particular, the treatment of convection is important, and semiconvection must be modeled in some detail. The products of seven head-on collisions are evolved through their initial thermal relaxation, and then through the main sequence phase to the base of the giant branch. Their evolutionary tracks are presented. In contrast to the assumptions in previous work, these collision products do not develop substantial convective regions during their thermal relaxation, and therefore are not mixed significantly after the collision.
description: 45 pages, 8 figures (encapsulated postscript), uses AASTeX, to be published in Astrophysical Journal volume 487
The California-Kepler Survey. VI: Kepler Multis and Singles Have Similar Planet and Stellar Properties Indicating a Common Origin
Creators: name: Weiss, Lauren M.
name: Isaacson, Howard T.
name: Marcy, Geoffrey W.
name: Howard, Andrew W.
name: Petigura, Erik A.
name: Fulton, Benjamin J.
name: Winn, Joshua N.
name: Hirsch, Lea
name: Sinukoff, Evan
name: Rowe, Jason F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The California-Kepler Survey (CKS) catalog contains precise stellar and planetary properties for the \Kepler\ planet candidates, including systems with multiple detected transiting planets ("multis") and systems with just one detected transiting planet ("singles," although additional planets could exist). We compared the stellar and planetary properties of the multis and singles in a homogenous subset of the full CKS-Gaia catalog. We found that sub-Neptune sized singles and multis do not differ in their stellar properties or planet radii. In particular: (1.) The distributions of stellar properties $M_\star$, [Fe/H], and $v\mathrm{sin}i$ for the Kepler sub Neptune-sized singles and multis are statistically indistinguishable. (2.) The radius distributions of the sub-Neptune sized singles and multis with $P > 3$ days are indistinguishable, and both have a valley at $\sim1.8~R_\oplus$. However, there are significantly more detected short-period ($P < 3$ days), sub-Neptune sized singles than multis. The similarity of the host star properties, planet radii, and radius valley for singles and multis suggests a common origin. The similar radius valley, which is likely sculpted by photo-evaporation from the host star within the first 100 Myr, suggests that planets in both singles and multis spend much of the first 100 Myr near their present, close-in locations. One explanation that is consistent with the similar fundamental properties of singles and multis is that many of the singles are members of multi-planet systems that underwent planet-planet scattering.
description: Accepted for publication in the Astronomical Journal. 23 pages, 9 figures
Design of the tertiary optical system for the Large Latin American Millimeter Array radio telescope
Creators: name: Rasztocky, Emiliano
name: Hampel, Matias Rolf
name: Reeves, Rodrigo
name: Lepine, Jacques R. D.
name: Romero, Gustavo Esteban
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Many modern radio telescopes employ an observational strategy that involves maximizing the use of their available spaces (cabins), outfitting them with various receivers at different frequencies to detect incoming signals from the sky simultaneously or individually. The Large Latin American Millimeter Array (LLAMA), is a joint venture between Argentina and Brazil consisting of the installation and operation of a 12-meter aperture Cassegrain telescope. It features three available cabins for instrumentation and plans to install six single-pixel heterodyne receivers, covering different bandwidths in the 30 to 950 GHz window of the electromagnetic spectrum, in its two lateral Nasmyth cabins at different phases of the project. Therefore, it is crucial not only to design a tertiary optical system that couples the antenna beam to those receivers, but also to do it in a scalable way. The primary goal for the design is to simultaneously maximize the antenna efficiency while minimizing optical aberrations for all receivers, both fundamental aspects for the optimal functioning of cutting-edge astronomical instruments. In this paper, we present the entire design process, starting from the quasi-optical approach based on the propagation of a fundamental Gaussian beam mode, continuing with the validation of the design based on physical optics simulations, and ending with a tolerance analysis of the system. As a result of this process, a frequency independent tertiary optical system has been achieved for almost all the receivers, which is expected to provide high optical performance for the radio telescope.
description: 44pages, 28 figures, 14 tables
Unitary unravelling for the Dissipative Continuous Spontaneous Localization model: application to optomechanical experiments
Creators: name: Nobakht, J.
name: Carlesso, M.
name: Donadi, S.
name: Paternostro, M.
name: Bassi, A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Continuous Spontaneous Localization (CSL) model strives to describe the quantum-to-classical transition from the viewpoint of collapse models. However, its original formulation suffers from a fundamental inconsistency in that it is explicitly energy non-conserving. Fortunately, a dissipative extension to CSL has been recently formulated that solves such energy-divergence problem. We compare the predictions of the dissipative and non-dissipative CSL models when various optomechanical settings are used, and contrast such predictions with available experimental data, thus building the corresponding exclusion plots.
Discovery of Proton Decay: A Must for Theory, a Challenge for Experiment
Creators: name: Pati, Jogesh C.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is noted that, but for one missing piece -- proton decay -- the evidence in support of grand unification is now strong. It includes: (i) the observed family-structure, (ii) the meeting of the gauge couplings, (iii) neutrino-oscillations, (iv) the intricate pattern of the masses and mixings of all fermions, including the neutrinos, and (v) the need for $B-L$ as a generator, to implement baryogenesis. Taken together, these not only favor grand unification but in fact select out a particular route to such unification, based on the ideas of supersymmetry, SU(4)-color and left-right symmetry. Thus they point to the relevance of an effective string-unified G(224) or SO(10)-symmetry. A concrete proposal is presented, within a predictive SO(10)/G(224)-framework, that successfully describes the masses and mixings of all fermions, including the neutrinos - with eight predictions, all in agreement with observation. Within this framework, a systematic study of proton decay is carried out, which pays special attention to its dependence on the fermion masses, including the superheavy Majorana masses of the right-handed neutrinos. The study shows that a conservative upper limit on the proton lifetime is about (1/2 - 1)$\times10^{34}$ yrs, with $\overlineνK^{+}$ being the dominant decay mode, and as a distinctive feature, $μ^{+}K^{0}$ being prominent. This in turn strongly suggests that an improvement in the current sensitivity by a factor of five to ten (compared to SuperK) ought to reveal proton decay. Otherwise some promising and remarkably successful ideas on unification would suffer a major setback.
description: LaTex file 29 pages, no figures. Minor corrections
The Zero Point of Extinction Toward Baade's Window
Creators: name: Gould, Andrew
name: Popowski, Piotr
name: Terndrup, Donald M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We measure the zero point of the Stanek (1996) extinction map by comparing the observed (V-K) colors of 206 K giant stars with their intrinsic (V-K)_0 colors as derived from their Hβindices. We find that the zero point of the Stanek map should be changed by ΔA_V = -0.10 +/- 0.06 mag, obtaining as a bonus a three-fold reduction of the previous statistical error. The most direct way to test for systematic errors in this determination would be to conduct a parallel measurement based on the (V-K) colors of RR Lyraes (type ab).
description: 10 pages, 1 figure
Solenopsis orbuloides André, 1890, nov. sp.
Creators: name: André, E.
Publisher: name: Zenodo
Year: 1890
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Solenopsis
Solenopsis orbuloides

description: Solenopsis orbuloides nov. sp.
Ouvriere: Tout a fait semblable au S. orbula Em., avec les differences suivantes: la tete est un peu moins allongee, les yeux sont plus apparents, moins ponctiformes, la massue des antennes est un peu plus courte et plus epaisse, le thorax est plus distinctement etrangle entre le mesonotum et le metanotum, le petiole est sensiblement plus etroit, la pilosite est beaucoup plus rare et la taille est generalement plus petite, depassant rarement d mill.
description: Published as part of André, E., 1890, Matériaux pour servir a la faune myrmécologique de Sierra-Leone (Afrique occidentale)., pp. 311-327 in Revista de Entomologia 9 on page 321
title: ADCO, Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.2 (2e moitié XIIIe siècle), Cart. 167 (11 H 67), f. 0016r
Creators: name: de la Côte d'Or, Archives départementales
name: CG21/F.PETOT/2010
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.2 (2e moitié XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 167 (11 H 67), f. 0016r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de l'abbaye de Cîteaux dit Cartulare Antiquum t.2 (2e moitié XIIIe siècle), Archives départementales de la Côte-d'Or, Cart. 167 (11 H 67), f. 0016r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Continuum approximations to systems of correlated interacting particles
Creators: name: Berlyand, Leonid
name: Creese, Robert
name: Jabin, Pierre-Emmanuel
name: Potomkin, Mykhailo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider a system of interacting particles with random initial conditions. Continuum approximations of the system, based on truncations of the BBGKY hierarchy, are described and simulated for various initial distributions and types of interaction. Specifically, we compare the Mean Field Approximation (MFA), the Kirkwood Superposition Approximation (KSA), and a recently developed truncation of the BBGKY hierarchy (the Truncation Approximation - TA). We show that KSA and TA perform more accurately than MFA in capturing approximate distributions (histograms) obtained from Monte Carlo simulations. Furthermore, TA is more numerically stable and less computationally expensive than KSA.
The Standard Model on a Planck Lattice: Mixing Angles vs Quark Masses
Creators: name: Preparata, Giuliano
name: Xue, She-Sheng
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Proceeding in our research programme on the Standard Model (SM) on a Planck lattice (PLSM) we analyse the emergence of the quark masses through a ``superconducting'' mechanism of spontaneous violation of the chiral symmetry of the Standard Model. Due to the peculiar structure of the lattice coupling of the $W^\pm$ gauge bosons, we discover four new relationships between the angles of the mixing matrix and the (current) quark masses. In particular, we predict the CP-violating phase $δ_{13}\simeq 79^\circ$.
description: 7 pages, latex, one figure, which will be available upon request
Minimal Paths for Tubular Structure Segmentation with Coherence Penalty and Adaptive Anisotropy
Creators: name: Chen, Da
name: Zhang, Jiong
name: Cohen, Laurent D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The minimal path method has proven to be particularly useful and efficient in tubular structure segmentation applications. In this paper, we propose a new minimal path model associated with a dynamic Riemannian metric embedded with an appearance feature coherence penalty and an adaptive anisotropy enhancement term. The features that characterize the appearance and anisotropy properties of a tubular structure are extracted through the associated orientation score. The proposed dynamic Riemannian metric is updated in the course of the geodesic distance computation carried out by the efficient single-pass fast marching method. Compared to state-of-the-art minimal path models, the proposed minimal path model is able to extract the desired tubular structures from a complicated vessel tree structure. In addition, we propose an efficient prior path-based method to search for vessel radius value at each centerline position of the target. Finally, we perform the numerical experiments on both synthetic and real images. The quantitive validation is carried out on retinal vessel images. The results indicate that the proposed model indeed achieves a promising performance.
description: This manuscript has been accepted by IEEE Trans. Image Processing, 2018
Momentum expansion of massive two-loop Feynman graphs around a finite value
Creators: name: Ghinculov, A.
name: Yao, Y. P.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give an algorithm for obtaining expansions of massive two-loop Feynman graphs in powers of the external momentum around a finite, nonzero value of the momentum. This is based on our general two-loop formalism to reduce massive two-loop graphs with renormalizable interactions into a standard set of special functions. After the algebraic reduction, the final results are obtained by numerical integration. We apply the expansion algorithm to treat the top-dependent corrections of O(g^2 alpha_s) to the b quark self-energy and extract its momentum expansion on-shell.
Comparative Assessment of Soil-Structure Interaction Regulations of ASCE 7-16 and ASCE 7-10
Creators: name: Khosravikia, Farid
name: Mahsuli, Mojtaba
name: Ghannad, Mohammad Ali
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: This paper evaluates the consequences of practicing soil structure interaction (SSI) regulations of ASCE 7-16 on seismic performance of building structures. The motivation for this research stems from the significant changes in the new SSI provisions of ASCE 7-16 compared to the previous 2010 edition. Generally, ASCE 7 considers SSI as a beneficial effect, and allows designer to reduce the design base shear. However, literature shows that this idea cannot properly capture the SSI effects on nonlinear systems. ASCE 7-16 is the first edition of ASCE 7 that considers the SSI effect on yielding systems. This study investigates the consequences of practicing the new provisions on a wide range of buildings with different dynamic characteristics on different soil types. Ductility demand of the structure forms the performance metric of this study, and the probability that practicing SSI provisions, in lieu of fixed-base provisions, increases the ductility demand of the structure is computed. The analyses are conducted within a probabilistic framework which considers the uncertainties in the ground motion and in the properties of the soil-structure system. It is concluded that, for structures with surface foundation on moderate to soft soils, SSI regulations of both ASCE 7-10 and ASCE 7-16 are fairly likely to result in a similar and larger structural responses than those obtained by practicing the fixed-base design regulations. However, for squat and ordinary stiff structures on soft soil or structures with embedded foundation on moderate to soft soils, the SSI provisions of ASCE 7-16 result in performance levels that are closer to those obtained by practicing the fixed-base regulations. Finally, for structures on very soft soils, the new SSI provisions of ASCE 7-16 are likely to rather conservative designs.
description: ASCE Structures Congress, Fort Worth, TX, USA, April 19-21 (2018)
Double transition of information spreading in a two-layered network
Creators: name: Wu, Jiao
name: Zheng, Muhua
name: Wang, Wei
name: Yang, Huijie
name: Gu, Changgui
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: A great deal of significant progress has been seen in the study of information spreading on populations of networked individuals. A common point in many of past studies is that there is only one transition in the phase diagram of the final accepted size versus the transmission probability. However, whether other factors alter this phenomenology is still under debate, especially for the case of information spreading through many channels and platforms. In the present study, we adopt a two-layered network to represent the interactions of multiple channels and propose a SAR (Susceptible-Accepted-Recovered) information spreading model. Interestingly, our model shows a novel double transition including a continuous transition and a following discontinuous transition in the phase diagram, which originates from two outbreaks between the two layers of the network. Further, we reveal that the key factors are a weak coupling condition between the two layers, a large adoption threshold and the difference of the degree distributions between the two layers. Then, an edge-based compartmental theory is developed which fully explains all numerical results. Our findings may be of significance for understanding the secondary outbreaks of the information in real life.
Kepler's third law of n-body periodic orbits in a Newtonian gravitation field
Creators: name: Sun, Bohua
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This study considers the periodic orbital period of an n-body system from the perspective of dimension analysis. According to characteristics of the n-body system with point masses $(m_1,m_2,...,m_n)$, the gravitational field parameter, $α\sim Gm_im_j$, the n-body system reduction mass $M_n$, and the area, $A_n$, of the periodic orbit are selected as the basic parameters, while the period, $T_n$, and the system energy, $|E_n|$, are expressed as the three basic parameters. Using the Buckingham $π$ theorem, We obtained an epic result, by working with a reduced gravitation parameter $α_n$, then predicting a dimensionless relation $T_n|E_n|^{3/2}=\text{const} \times α_n \sqrt{μ_n}$ ($μ_n$ is reduced mass). The const$=\fracπ{\sqrt{2}}$ is derived by matching with the 2-body Kepler's third law, and then a surprisingly simple relation for Kepler's third law of an n-body system is derived by invoking a symmetry constraint inspired from Newton's gravitational law: $T_n|E_n|^{3/2}=\fracπ{\sqrt{2}} G\left(\frac{\sum_{i=1}^n\sum_{j=i+1}^n(m_im_j)^3}{\sum_{k=1}^n m_k}\right)^{1/2}$. This formulae is, of course, consistent with the Kepler's third law of 2-body system, but yields a non-trivial prediction of the Kepler's third law of 3-body: $T_3|E_3|^{3/2}= \fracπ{\sqrt{2}} G \left[\frac{(m_1m_2)^3+(m_1m_3)^3+(m_2m_3)^3}{m_1+m_2+m_3}\right]^{1/2}$. A numerical validation and comparison study was conducted. This study provides a shortcut in search of the periodic solutions of three-body and n-body problems and has valuable application prospects in space exploration.
description: 6 pages, 11 figues