cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Space based microlensing planet searches
Creators: name: Beaulieu, J. P.
name: Tisserand, P.
name: Batista, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The discovery of extra-solar planets is arguably the most exciting development in astrophysics during the past 15 years, rivalled only by the detection of dark energy. Two projects unite the communities of exoplanet scientists and cosmologists: the proposed ESA M class mission EUCLID and the large space mission WFIRST, top ranked by the Astronomy 2010 Decadal Survey report. The later states that: "Space-based microlensing is the optimal approach to providing a true statistical census of planetary systems in the Galaxy, over a range of likely semi-major axes". They also add: "This census, combined with that made by the Kepler mission, will determine how common Earth-like planets are over a wide range of orbital parameters". We will present a status report of the results obtained by microlensing on exoplanets and the new objectives of the next generation of ground based wide field imager networks. We will finally discuss the fantastic prospect offered by space based microlensing at the horizon 2020-2025.
description: 8 pages, Proceedings to the ROPACS meeting "Hot Planets and Cool Stars" (Nov. 2012, Garching), invited contribution
Weighted projected networks: mapping hypergraphs to networks
Creators: name: López, Eduardo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Many natural, technological, and social systems incorporate multiway interactions, yet are characterized and measured on the basis of weighted pairwise interactions. In this article, I propose a family of models in which pairwise interactions originate from multiway interactions, by starting from ensembles of hypergraphs and applying projections that generate ensembles of weighted projected networks. I calculate analytically the statistical properties of weighted projected networks, and suggest ways these could be used beyond theoretical studies. Weighted projected networks typically exhibit weight disorder along links even for very simple generating hypergraph ensembles. Also, as the size of a hypergraph changes, a signature of multiway interaction emerges on the link weights of weighted projected networks that distinguishes them from fundamentally weighted pairwise networks. This signature could be used to search for hidden multiway interactions in weighted network data. I find the percolation threshold and size of the largest component for hypergraphs of arbitrary uniform rank, translate the results into projected networks, and show that the transition is second order. This general approach to network formation has the potential to shed new light on our understanding of weighted networks.
description: 4 figures. 3 tables. 28 pages. Expanded discussion about application
Development of a competitive technique for the comparison of strong oxidation inhibitors
Creators: name: Tunder, Richard Steve
Publisher: name: California Institute of Technology
Year: 1961
Subjects: Chemistry

description: The mechanism of the inhibited chain oxidation of
cumene has been carefully investigated in previous studies.
A competitive technique for determining relative efficiencies of strong inhibitors was to be tried in this study. Such a study might extend and verify work of a similar nature on weaker inhibitors. However the relative efficiencies determined were not constant. They varied because of possible side reactions of N,N'-dipheny1-p-phenylenediamine, the inhibitor chosen as a standard. For the same reason variation of the initial concentration of the standard inhibitor caused slight unexpected deviations in the results.

Hydroquinones were found to reduce N,N'-diphenyl-p-quinonimine, the oxidation product of the standard inhibitor, back to the inhibitor while stopping chains at the same time. As in previous studies, the strength of an inhibitor was found to increase with increasing ortho steric hindrance as well as with increasing electron density in the aromatic ring. Initiator concentration was found to be first order with respect to termination rate as would be expected in a chain reaction in which an inhibitor molecule stops two radical chains. The oxidation product formed from a phenolic inhibitor was found not to affect the standard inhibitor.
Additional file 1 of Barriers and facilitators for treatment and control of high blood pressure among hypertensive patients in Kathmandu, Nepal: a qualitative study informed by COM-B model of behavior change
Creators: name: Bhandari, Buna
name: Narasimhan, Padmanesan
name: Vaidya, Abhinav
name: Subedi, Madhusudan
name: Jayasuriya, Rohan
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. IDI and FGD guides. Description: It contains the IDI guides for patients with high blood pressure (I), health care workers (II) and FGD guide for the patients with high blood pressure (III).
Musée de Ravestein. Catalogue descriptif par E. de Meester de Ravestein, Liege 1871
Creators: name: Fiedler, Franz
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Musée de Ravestein. Catalogue descriptif par E. de Meester de Ravestein. Tome 1. Liege 1871. gr. 8. 572 SS. M. Abbildung des château de Ravestein sous Hever (bei Mecheln). Tom. Ilde et dern. 1872. 380 SS. Mit Abbildung der Galerie des Museums und einer päpstlichen Medaille.
description: Bonner Jahrbücher, Bd. 52 (1872): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Die Weiheinschrift des Clematius in der Ursulakirche zu Köln
Creators: name: Düntzer, Heinrich
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 55/56 (1875): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Symmetries of Vector Perturbations during the de Sitter Epoch
Creators: name: Biagetti, Matteo
name: Kehagias, Alex
name: Morgante, Enrico
name: Perrier, Hideki
name: Riotto, Antonio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the class of models where a suitable coupling between the inflaton field and the vector field gives rise to scale-invariant vector perturbations. We exploit the fact that the de Sitter isometry group acts as conformal group on the three-dimensional Euclidean space for the super-Hubble fluctuations in order to characterize the correlators involving the inflaton and the vector fields.
description: v2: References added, last paragraph of section 4 clarified. Submitted to JCAP
Der alte Gereons-Altar in der gleichnamigen Kirche zu Köln
Creators: name: Ennen, Leonard
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 55/56 (1875): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
Supplementary document for Pseudoheterodyne interferometry for multicolor near-field imaging - 6392191.pdf
Creators: name: Vicentini, Edoardo
name: NUANSING, WIWAT
name: Niehues, Iris
name: Amenabar, Iban
name: Bittner, Alex
name: Hillenbrand, Rainer
name: Schnell, Martin
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplement
Yvonne Schmuhl, Römische Siegesmonumente republikanischer Zeit. Untersuchungen zu Ursprüngen, Erscheinungsformen und Denkmalpolitik
Creators: name: Laube, Ingrid
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Yvonne Schmuhl, Römische Siegesmonumente republikanischer Zeit. Untersuchungen zu Ursprüngen, Erscheinungsformen und Denkmalpolitik. Antiquitates. Archäologische Forschungsergebnisse, Band . Verlag Dr. Kovač, Hamburg 2008. 360 Seiten, 168 Abbildungen
description: Bonner Jahrbücher, Bd. 208.2008(2010): Bonner Jahrbücher
High catalytic activity and stability of X/CoAl2O4 (X = Ni, Co, Rh, Ru) catalysts with no observable coke formation applied in the autothermal dry reforming of methane lined on cordierite monolith reactors
Creators: name: Khalighi, Reza
Publisher: name: figshare
Year: 2022
Subjects: Forensic chemistry
Other chemical sciences not elsewhere classified
Analytical chemistry not elsewhere classified
Analytical spectrometry
Flow analysis
Electroanalytical chemistry
Quality assurance, chemometrics, traceability and metrological chemistry
Separation science

description: The autothermal dry reforming of methane was performed using the novel CoAl2O4 spinel as a catalyst support on the monolithic and fixed bed reactors. X/CoAl2O4 (X = Ni, Co, Rh, Ru) and Ni/γ-Al2O3 nanocrystalline mesoporous catalysts were characterized by XRD, BET, SEM, FESEM, HRTEM and TGA. The effects of different experimental parameters, such as temperature and gas hourly space velocity on CH4 and CO2 Conversions, H2 yield and H2/Co ratio were examined and studied. The monolithic reactor has a much higher capacity and efficiency than a fixed bed reactor. Methane conversion and catalyst stability at 700 °C were enhanced via the addition of Nobel metals such as Ru and Rh. Maximum methane conversions of 98% was observed for the sample with the CoAl2O4 support and Rh content (3 wt%), with no sign of catalyst deactivation or carbon formation, making these promising materials for the dry reforming reaction.
Microporous and Mesoporous Materials.pdf
Creators: name: Khalighi, Reza
Publisher: name: figshare
Year: 2022
Subjects: Forensic chemistry
Other chemical sciences not elsewhere classified
Analytical chemistry not elsewhere classified
Analytical spectrometry
Flow analysis
Electroanalytical chemistry
Quality assurance, chemometrics, traceability and metrological chemistry
Separation science

description: The autothermal dry reforming of methane was performed using the novel CoAl2O4 spinel as a catalyst support on the monolithic and fixed bed reactors. X/CoAl2O4 (X = Ni, Co, Rh, Ru) and Ni/γ-Al2O3 nanocrystalline mesoporous catalysts were characterized by XRD, BET, SEM, FESEM, HRTEM and TGA. The effects of different experimental parameters, such as temperature and gas hourly space velocity on CH4 and CO2 Conversions, H2 yield and H2/Co ratio were examined and studied. The monolithic reactor has a much higher capacity and efficiency than a fixed bed reactor. Methane conversion and catalyst stability at 700 °C were enhanced via the addition of Nobel metals such as Ru and Rh. Maximum methane conversions of 98% was observed for the sample with the CoAl2O4 support and Rh content (3 wt%), with no sign of catalyst deactivation or carbon formation, making these promising materials for the dry reforming reaction.
Effects of planform curvature in supersonic wings
Creators: name: Hoeijmakers, Hendrik Willem Marie
Publisher: name: California Institute of Technology
Year: 1974
Subjects: Aeronautics

description: In this thesis a method is developed for calculating supersonic wings with curved subsonic leading edges. The linearized theory is used throughout the thesis.

The wing with the curved subsonic leading edges is transformed into a wing with straight subsonic leading edges by means of a transformation as used by Coene for quasi-homogeneous approximations to the solution of this problem. The Mach cone is invariant under the transformation.

The solution of the transformed Prandtl-Glauert equation is expressed in terms of Fenain's solutions for the delta wing. In general the solution is an infinite sum of terms, each term related to a solution for the delta wing. However, a condition is formulated under which certain families of wings with curved leading edges possess solutions in closed form. It is shown that any boundary value problem for such wings can be solved by the superposition of these exact solutions of the Prandtl-Glauert equation. The problem is thus reduced to determining the number of terms necessary to approximate the given boundary values within satisfactory bounds, and within a satisfactory region of the wing.

One family of wings with curved leading edges that has a solution in closed form is found. The flat plate with these leading edges is studied in detail. In order to find a reasonable approximation to the flat plate, in a satisfactory region of the wing, up to five solutions are superposed. It has been found that the curvature has a considerable effect on the perturbation velocity and the leading edge suction force. The leading edge suction force thus found is compared with that calculated by some other approximate methods.
Geology of a portion of the Sunland Quadrangle, Los Angeles County, California
Creators: name: Anderson, Keith Elliott
Publisher: name: California Institute of Technology
Year: 1940
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: The area studied consists of a portion of the Sunland
quadrangle in Southern California. The area is about seventeen miles northwest of Pasadena, California, and is best reached by automobile from Pasadena by driving westward on Foothill Boulevard.

The area is slightly over one mile square in size,
and is bounded on the west by Bartholomaus Canyon, and on the east by Little Tujunga Canyon. The district is cultivated in orange and lemon groves in the southern section, and the entire area, especially Kagel Canyon, is well populated.

Field work was done with pace and Brunton compass on
a photographic enlargement of U.S.G.S. topographic map of
the Sunland quadrangle. The mapping and report were done in
partial fulfillment of the requirements for the degree of
Bachelor of Science at the California Institute of Technology.

About twenty days were spent in the field in mapping and
gathering of data. Work was done from January to June, 1940.
Archaeological Excavations at Archaic Period Site of Maria de La Cruz, Puerto Rico-2013 Report.pdf
Creators: name: Oliver, Jose R.
Publisher: name: figshare
Year: 2022
Subjects: Archaeology

description: The results of the 2012 excavation at this cave are discussed and compared with those of obtained previously by Alegría. Our study confirms Alegría’s stratigraphic sequence. The new date (Cal. AD 20-210) fits well with two others reported previously. The upper strata indicate that by this time the Archaic group had vacated the cave and that the activities related only to groups bearing Saladoid ceramics. But our evidence shows that from its inception the Archaic group interacted with nearby Saladoid settlers. The cave had a specialized function: a locus for processing and consuming a limited range of hunted and gathered wild resources during this early phase. The late phase is marked by two changes: intensive limestone rock burning and a different funerary practice (random bone scattering). We conclude that the cave was never used as residential locus but as a logistical station for specialized wild food processing activities. The Archaic probably resided in open sites (yet to be identified), whereas the Saladoids most likely resided in Hacienda Grande and/or Vacía Talega. Although the cave was occasionally a locus of funerary rituals it was not exclusively dedicated to religious ceremonialism
Experimental deflection survey of cantilever sectors of uniform thickness
Creators: name: Henry, William E.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: The purpose of this investigation was to study the deflection patterns of uniform thickness 24ST aluminum alloy sectors fixed on one radius and subjected to transverse loads.

This investigation consisted of obtaining deflection data in the form of influence coefficients for cantilever sectors of opening angles varying from 0 to 180 degrees.

The deflection data are presented in a form that requires only a matrix multiplication to obtain the deflection pattern of any sector of the same material constants and dimensions as those used in this investigation. For sectors of different material constants and dimensions the deflection pattern may be obtained by interpolation of the data presented in this investigation and use of elementary elastic relationships.

The comparison of the experimental and analytical solution of the deflection pattern of a 45 degree sector subjected to a shear loading and radial moments along the curved boundary showed satisfactory agreement.

This investigation was carried out at the Guggenheim Aeronautical Laboratory, California Institute of Technology, Pasadena, California (referred to hereafter as GALCIT).
Measuring the likelihood of models for network evolution
Creators: name: Clegg, Richard G.
name: Landa, Raul
name: Haddadi, Hamed
name: Rio, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Applications (stat.AP)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Many researchers have hypothesised models which explain the evolution of the topology of a target network. The framework described in this paper gives the likelihood that the target network arose from the hypothesised model. This allows rival hypothesised models to be compared for their ability to explain the target network. A null model (of random evolution) is proposed as a baseline for comparison. The framework also considers models made from linear combinations of model components. A method is given for the automatic optimisation of component weights. The framework is tested on simulated networks with known parameters and also on real data.
description: Published in INFOCOM NetSciCom Workshop 2009. http://dl.acm.org/citation.cfm?id=1719896
Entanglement at a Two-Dimensional Quantum Critical Point: a Numerical Linked Cluster Expansion Study
Creators: name: Kallin, Ann B.
name: Hyatt, Katharine
name: Singh, Rajiv R. P.
name: Melko, Roger G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a method to calculate the bipartite entanglement entropy of quantum models, in the thermodynamic limit, using a Numerical Linked Cluster Expansion (NLCE) involving only rectangular clusters. It is based on exact diagonalization of all n x m rectangular clusters at the interface between entangled subsystems A and B. We use it to obtain the Renyi entanglement entropy of the two-dimensional transverse field Ising model, for arbitrary real Renyi index alpha. Extrapolating these results as a function of the order of the calculation, we obtain universal pieces of the entanglement entropy associated with lines and corners at the quantum critical point. They show NLCE to be one of the few methods capable of accurately calculating universal properties of arbitrary Renyi entropies at higher dimensional critical points.
description: 5 pages, 4 figures
The Crab Nebula and the class of Type IIn-P supernovae caused by sub-energetic electron capture explosions
Creators: name: Smith, Nathan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: What sort of supernova gave rise to the Crab Nebula? There are several indications that the Crab arose from a sub-energetic explosion of an 8-10 Msun star, this appears to conflict with the high luminosity indicated by historical observations. This paper shows that several properties of the Crab are best suited to Type IIn-P explosions (Type IIn spectra with plateau light curves). These events probably arise from relatively low-energy (1e50 erg) explosions with low 56Ni yield resulting from electron-capture SNe (ecSNe), but their high luminosity and Type IIn spectra are dominated by shock interaction with CSM. After about 120 days, nearly all of the mass in the CSM and ejecta ends up in a slow dense shell. In the scenario proposed here for SN1054, this thin shell is accelerated by the growing pulsar wind nebula, producing the complex network of filaments seen today. There is no need to invoke the invisible fast SN envelope hypothesized to reside outside the Crab. SNeIIn-P explain several observed features of the Crab: (1) No blast wave or rapidly expanding SN envelope outside the filaments, (2) a total mass of 5 Msun swept up in a thin shell, (3) a high peak luminosity despite the low kinetic energy, and (4) chemical abundances consistent with an 8-10 Msun star and low 56Ni yield. A number of other implications are discussed, concerning other Crab-like remnants, dust in the Crab filaments, diversity in the initial masses of SNe IIn, and an association between ecSNe and SN impostors. This model predicts that if light echoes from SN1054 are discovered, they will be consistent with a Type IIn-P spectrum.
description: 13 pages, 4 figures, accepted
Supplementary document for Spin-orbit interaction in nanofiber-based Brillouin scattering - 6406266.pdf
Creators: name: Zerbib, Maxime
name: Romanet, Maxime
name: Sylvestre, Thibaut
name: Wolff, Christian
name: Stiller, Birgit
name: Beugnot, Jean Charles
name: Huy, Kien Phan
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: subject: 20503 Nonlinear Optics and Spectroscopy
subject: FOS: Physical sciences

description: Supplemental document
Spectral Transition for Random Quantum Walks on Trees
Creators: name: Hamza, Eman
name: Joye, Alain
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 82C41

description: We define and analyze random quantum walks on homogeneous trees of degree $q\geq 3$. Such walks describe the discrete time evolution of a quantum particle with internal degree of freedom in $\C^q$ hopping on the neighboring sites of the tree in presence of static disorder. The one time step random unitary evolution operator of the particle depends on a unitary matrix $C\in U(q)$ which monitors the strength of the disorder. We prove for any $q$ that there exist open sets of matrices in $U(q)$ for which the random evolution has either pure point spectrum almost surely or purely absolutely continuous spectrum, thereby showing the existence of a spectral transition driven by $C\in U(q)$. For $q\in\{3,4\}$, we establish properties of the spectral diagram which provide a description of the spectral transition.
description: 25 pages, 7 figures
Equilibrium and kinetics studies for the adsorption of Basic Red 46 on nickel oxide nanoparticles-modified diatomite in aqueous solutions
Creators: name: Khalighi, Reza
Publisher: name: figshare
Year: 2022
Subjects: Carbon capture engineering (excl. sequestration)
Chemical and thermal processes in energy and combustion
Chemical engineering design
Process control and simulation
Reaction engineering (excl. nuclear reactions)
Separation technologies
Wastewater treatment processes
Water treatment processes

description: The nickel oxide nanoparticles-modified diatomite (NONMD) as a low-cost adsorbent was investigated for the removal of C.I. Basic Red 46 (BR46) from aqueous solution. Various physico-chemical parameters were studied such as solution pH, adsorbent dosage, adsorbent size, initial dye concentration, temperature, contact time and salt (NaCl, NaHCO3 and Na2SO4). The mean size and the surface morphology of the adsorbent were characterized by SEM, BET, FTIR, XRD, EDX and elemental analysis. The maximum percentage of BR46 dye removal from aqueous solution was 99.48% (124.35 mg/g) when 0.005 g of NONMD was applied at pH 8, temperature 25 ± 1 °C, agitation speed of 200 rpm, initial dye concentration of 25 mg/L, and a mixing time of 60 min. Furthermore, under the same conditions, the maximum adsorption of dye on raw diatomite was 84.49% (105.61 mg/g). The experimental data showed that the adsorption of dye on raw diatomite follows the Langmuir model, but its adsorption on modified diatomite followed the BET model. The kinetics results were found to conform well to pseudo-second order kinetics model with good correlation. Thus, this study demonstrated that the NONMD could be used as a low-cost natural adsorbent for removal of BR46 from aqueous solution.
Defect Motifs for Constant Mean Curvature Surfaces
Creators: name: Kusumaatmaja, Halim
name: Wales, David J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The energy landscapes of electrostatically charged particles embedded on constant mean curvature surfaces are analysed for a wide range of system size, curvature, and interaction potentials. The surfaces are taken to be rigid, and the basin-hopping method is used to locate the putative global minimum structures. The defect motifs favoured by potential energy agree with experimental observations for colloidal systems: extended defects (scars and pleats) for weakly positive and negative Gaussian curvatures, and isolated defects for strongly negative Gaussian curvatures. Near the phase boundary between these regimes the two motifs are in strong competition, as evidenced from the appearance of distinct funnels in the potential energy landscape. We also report a novel defect motif consisting of pentagon pairs.
description: 10 pages, 4 figures, accepted for publication in Physical Review Letters
Two-mode back-action-evading measurements in cavity optomechanics
Creators: name: Woolley, M. J.
name: Clerk, A. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study theoretically a three-mode optomechanical system where two mechanical oscillators are coupled to a single cavity mode. By using two-tone (i.e. amplitude-modulated) driving of the cavity, it is possible to couple the cavity to a single collective quadrature of the mechanical oscillators. In such a way, a back-action-evading measurement of the collective mechanical quadrature is possible. We discuss how this can allow one to measure both quadratures of a mechanical force beyond the full quantum limit, paying close attention to the role of dissipation and experimental imperfections. We also describe how this scheme allows one to generate steady-state mechanical entanglement; namely, one can conditionally prepare an entangled, two-mode squeezed mechanical state. This entanglement can be verified directly from the measurement record by applying a generalized version of Duan's inequality; we also discuss how feedback can be used to produce unconditional entanglement.
description: 28 pages, 7 figures
Spherical Collapse of a Unified Dark Fluid with Constant Adiabatic Sound Speed
Creators: name: Xu, Lixin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper, we test the spherical collapse of a unified dark fluid (UDF) which has constant adiabatic sound speed. By choosing the different values of model parameters $B_s$ and $α$, we show the nonlinear collapse for UDF and baryons which are considered for their formation of the large scale structure of our Universe. The analyzed results show that larger values of $α$ and $B_s$ make the structure formation faster and earlier.
description: 5 pages, 4 figures, accepted for publication in Eur. Phys. J. C
The composition, texture, structure, and probable origin of the "Gatchell" sand
Creators: name: Regan, Louis John
Publisher: name: California Institute of Technology
Year: 1941
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: The purpose of the research has been to gather data on the structural and stratigraphic relations, composition, and texture of the "Gatchell" sand, and to attempt to interpret the conditions of deposition of the sand body in the light of this data. The "Gatchell" is the producing sand of the East Coalinea Extension Oil Field.

Several structure contour maps, an isopach map and two structure sections are presented to show the general structural relations of the "Gatchell". The sand body is thicker on the north than on the south; moreover the rate of eastward thickening is much more rapid in the northern area. The zero isopach, or line of pinch-out of the sane body, is remarkably straight and trends about north-south.

The sand is arkosic, containing between 20-30% feldspar. The feldspar is practically all potash feldspar, orthoclase and microcline being present in subequal amounts. Accessory or heavy minerals are scanty both in number of species and in total amount present. The assemblage is a very stable one, relatively rich in zircon, garnet, and tourmaline. The presence of glaucophane points to a Coast Range origin for at least some of the material. Whether the bulk of the sand was derived from the east or from the west cannot yet be shown.

The sand is very angular and coarse, but very well sorted, It is suggested that the agent transporting and depositing the sand was marine currents. Since the northern sand is older,* it is suggested that the sand body grew from north to south, and that the immediate source of the material may have been on the north.

The internal structure of the sand cannot be shown by bedding, which is lacking, nor by mineral zones, but a generalized picture can be obtained from a consideration of
charts showing the median grain size of the sand against depth. A number of these charts are presented in the appendix; it is suggested that in the southern area, at least, "Gatchell" sands transgressed from east to west over Hondo silts. The sand in wells on the west, near the line of pinch-out, is represented in wells on the east by the upper part of the sand body only.

The environment of deposition of the "Gatchell" cannot yet be demonstrated. However, four hypotheses are suggested and discussed, which fit some of the evidence. These hypotheses are (l) the baymouth bar-spit hypothesis (2) the offshore bar hypothesis (3) the shoreface terrace hypothesis and (4) the interfingering hypothesis.
An investigation of the effects of angle of attack and airfoil model size on the occurrence of shock waves in a two dimensional wind tunnel
Creators: name: Chambers, L. S.
name: Doll, R. E.
name: Harrell, D. A.
Publisher: name: California Institute of Technology
Year: 1944
Subjects: Aeronautics
Aeronautical Engineering

description: This paper presents the results of an investigation of the flow in the vicinity of one of the newer symmetrical NACA laminar flow airfoil sections at and above the orbital speed of the section, in the form of schlieren photographs and wall pressure distributions. The investigation was carried out in a two dimensional tunnel, designed for this purpose by the authors, at the Guggenheim Aeronautical Laboratory of the California Institute of Technology during the spring of 1944.

The formation and variation of the shock waves with angle of attack and Mach number are presented in a series of high speed photographs.  An attempt is made to indicate the effect of model size in a tunnel of fixed cross sectional area by presenting photographic results of the tests on airfoils of 2", 4", and 6" chord lengths.

Curves of C[subscript L] versus Mach number at constant angle of attack are presented for the three airfoils.
Improved QCD sum rule study of $Z_{c}(3900)$ as a $\bar{D}D^{*}$ molecular state
Creators: name: Zhang, Jian-Rong
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In the framework of QCD sum rules, we present an improved study of our previous work [Phys. Rev. D {\bf80}, 056004 (2009)] particularly on the $\bar{D}D^{*}$ molecular state to investigate that the possibility of the newly observed $Z_{c}(3900)$ as a $S$-wave $\bar{D}D^{*}$ molecular state. To ensure the quality of QCD sum rule analysis, contributions of up to dimension nine are calculated to test the convergence of operator product expansion (OPE). We find that the two-quark condensate $$ is very large and makes the standard OPE convergence (i.e. the perturbative at least larger than each condensate contribution) happen at very large values of Borel parameters. By releasing the rigid OPE convergence criterion, one could find that the OPE convergence is still under control. We arrive at the numerical result $3.86\pm0.27 {GeV}$ for $\bar{D}D^{*}$, which agrees with the mass of $Z_{c}(3900)$ and could support the explanation of $Z_{c}(3900)$ in terms of a $S$-wave $\bar{D}D^{*}$ molecular state.
description: the version accepted for publication in Phys. Rev. D; some reference and discussions added; 8 pages, 3 eps figures
Measuring the rotation period distribution of field M-dwarfs with Kepler
Creators: name: McQuillan, Amy
name: Aigrain, Suzanne
name: Mazeh, Tsevi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have analysed 10 months of public data from the Kepler space mission to measure rotation periods of main-sequence stars with masses between 0.3 and 0.55 M_sun. To derive the rotational period we introduce the autocorrelation function and show that it is robust against phase and amplitude modulation and residual instrumental systematics. Of the 2483 stars examined, we detected rotation periods in 1570 (63.2%), representing an increase of a factor ~ 30 in the number of rotation period determination for field M-dwarfs. The periods range from 0.37-69.7 days, with amplitudes ranging from 1.0-140.8 mmags. The rotation period distribution is clearly bimodal, with peaks at ~ 19 and ~ 33 days, hinting at two distinct waves of star formation, a hypothesis that is supported by the fact that slower rotators tend to have larger proper motions. The two peaks of the rotation period distribution form two distinct sequences in period-temperature space, with the period decreasing with increasing temperature, reminiscent of the Vaughan-Preston gap. The period-mass distribution of our sample shows no evidence of a transition at the fully convective boundary. On the other hand, the slope of the upper envelope of the period-mass relation changes sign around 0.55 M_sun, below which period rises with decreasing mass.
description: Accepted for publication in MNRAS. 15 pages, 14 figures, 5 tables. Full machine-readable versions of tables 2-5 are available as ancillary files, or with plots of the light curves, ACFs and periodograms at http://www.physics.ox.ac.uk/StellarRotation
Observation of micro-macro entanglement of light
Creators: name: Lvovsky, A. I.
name: Ghobadi, R.
name: Chandra, A.
name: Prasad, A. S.
name: Simon, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Schroedinger's famous thought experiment involves a (macroscopic) cat whose quantum state becomes entangled with that of a (microscopic) decaying nucleus. The creation of such micro-macro entanglement is currently being pursued in several fields, including atomic ensembles, superconducting circuits, electro-mechanical and opto-mechanical systems. For purely optical systems, there have been several proposals to create micro-macro entanglement by greatly amplifying one half of an initial microscopic entangled state of light, but experimental attempts have so far been inconclusive. Here we experimentally demonstrate micro-macro entanglement of light. The macro system involves over a hundred million photons, while the micro system is at the single-photon level. We show that microscopic differences (in field quadrature measurements) on one side are correlated with macroscopic differences (in the photon number variance) on the other side. On the other hand, we demonstrate entanglement by bringing the macroscopic state back to the single-photon level and performing full quantum state tomography of the final state. Our results show that it is possible to create and demonstrate micro-macro entanglement for unexpectedly large photon numbers. Schroedinger's thought experiment was originally intended to convey the absurdity of applying quantum mechanics to macroscopic objects. Today many quantum physicists believe that quantum principles in fact apply on all scales. By combining the present approach with other (e.g. mechanical) systems, or by applying its basic ideas in different contexts, it may be possible to bring quantum effects ever closer to our everyday experience.
The War on Terror and the War of Terror. The Reflective Politics of an Elite of Grievances and Their Young Acolytes Quest for Justice. The Case of Al Ghurabaa and The Saved Sect
Creators: name: Genovese, Danila
Publisher: name: Italian Sociological Review
Year: 2023

description: In the aftermath of an “Islamist” attack, public discussion of the causes of terrorism seems limited to the assumption that there could be no explanation for terrorism beyond the fanaticism of its perpetrators. This study attempts to comprehend the discourses and practices engaged in by two “extremist” Islamist parties: al Ghurabaa and the Saved Sect. On the basis of the author’s empirical work, the paper examines how their self-representation and their agenda are reflective of the strategies of the War on Terror. It introduces the concept of a fetishist desire for politics and it explores the dynamics of radicalization operating among them. Keywords: Islamism, terrorism, racism.
description: Italian Sociological Review, Vol. 13 No. 2 (2023)
No Country for Women. Women Working in the Italian Music Industry
Creators: name: Paraciani, Rebecca
Publisher: name: Italian Sociological Review
Year: 2023

description: The article looks at the characteristics of workers in the Italian music industry from a gender perspective. I studied female workers in the Italian music industry, which is analyzed as a male-dominated context. Based on 38 interviews conducted in Italy, this paper investigates female worker participation in the industry in question, stressing the perception of existing gender differences that show how female workers explain inequalities. The discourse analysis of the interviews collected focuses on the characteristics of the interviewees’ jobs, on their perceptions about their relationships with colleagues and on their work role. The study highlights that Italian music industry seems to be “No country for women”. First, there is the existence of “women’s jobs” and “men’s jobs” within the Italian music industry. Secondly, an exclusive club emerges, from which female workers feel they are shut out. Lastly, the distancing of female music workers from “other” women is highlighted, tending to define themselves “super-women”.
description: Italian Sociological Review, Vol. 13 No. 2 (2023)
100-year DASCH Light Curves of Kepler Planet-Candidate Host Stars
Creators: name: Tang, Sumin
name: Sasselov, Dimitar
name: Grindlay, Jonathan
name: Los, Edward
name: Servillat, Mathieu
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present 100 year light curves of Kepler planet-candidate host stars from the Digital Access to a Sky Century at Harvard (DASCH) project. 261 out of 997 host stars have at least 10 good measurements on DASCH scans of the Harvard plates. 109 of them have at least 100 good measurements, including 70% (73 out of 104) of all host stars with g<=13 mag, and 44% (100 out of 228) of all host stars with g<=14 mag. Our typical photometric uncertainty is ~0.1-0.15 mag. No variation is found at 3-sigma level for these host stars, including 21 confirmed or candidate hot Jupiter systems which might be expected to show enhanced flares from magnetic interactions between dwarf primaries and their close and relatively massive planet companions.
description: 7 pages, 3 figures. Accepted for publication in PASP
From National to Local (and Back). Religious Freedom and the Right to the City in Italy
Creators: name: Bossi, Luca
name: Ricucci, Roberta
Publisher: name: Italian Sociological Review
Year: 2023

description: Urban space can be seen as the social field in which the religious diversification of European societies emerges and assumes visibility. In this contexts, minority places of worship can be used at the same time as the marker of the presence – past and/or present – of a specific religious group and a reliable marker of religious diversity, helping assess the state of health of religious pluralism in itself. More than the national level of State-religions relationships, the local milieu of the city contributes in shaping and assessing contemporary forms of religious life. At the same time, cities represent the arena where old and new minorities struggle for space, visibility and recognition. At this level, the right to religious freedom interacts with the right to the city: local public institutions increasingly stand at the forefront in the regulation of religion-driven needs. This contribution presents evidences from research conducted in the city of Turin, a representative case in the Italian scenario on the above-mentioned issues. Based on a comparative case study, it focuses on the different dynamics of symbolical positioning and material placing enacted by four different minorities: Islam, Judaism, Orthodoxy, and Scientology. Drawing on empirical evidences collected over a period of three years, we analyse the actor constellation involved in the regulation of religious diversity in the city, discussing both policy implications and policy transferability guidelines.
description: Italian Sociological Review, Vol. 13 No. 2 (2023)
High-energy emission from pulsar binaries
Creators: name: Mochol, Iwona
name: Kirk, John G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Unpulsed, high-energy emission from pulsar binaries can be attributed to the interaction of a pulsar wind with that of a companion star. At the shock between the outflows, particles carried away from the pulsar magnetosphere are accelerated and radiate both in synchrotron and inverse Compton processes. This emission constitutes a significant fraction of the pulsar spin-down luminosity. It is not clear however, how the highly magnetized pulsar wind could convert its mainly electromagnetic energy into the particles with such high efficiency. Here we investigate a scenario in which a pulsar striped wind converts into a strong electromagnetic wave before reaching the shock. This mode can be thought of as a shock precursor that is able to accelerate particles to ultrarelativistic energies at the expense of the electromagnetic energy it carries. Radiation of the particles leads to damping of the wave. The efficiency of this process depends on the physical conditions imposed by the external medium. Two regimes can be distinguished: a high density one, where the EM wave cannot be launched at all and the current sheets in the striped wind are first compressed by an MHD shock and subsequently dissipate by reconnection, and a low density one, where the wind can first convert into an electromagnetic wave in the shock precursor, which then damps and merges into the surroundings. Shocks in binary systems can transit from one regime to another according to binary phase. We discuss possible observational implications for these objects.
description: 4 pages, 1 figure. Proceedings of Gamma2012, July 9-13, Heidelberg, Germany
Living Together in the Company: Operational Efficiency as a Function of Social and Relational Dynamics in Organizations
Creators: name: Sartori, Riccardo
name: Tommasi, Francesco
name: Ceschi, Andrea
name: Zene, Mattia
name: Morandini, Sofia
name: Monti, Michele
name: Gostimir, Marija
Publisher: name: Italian Sociological Review
Year: 2023

description: As Gozzoli (2016) points out, living together in the company has always been a complex challenge, since in organizations people find themselves interacting, developing relationships, producing, and share spaces and time, with little chance to choose each other, a phenomenon known as organizational coexistence. And yet people in the company are asked to cooperate to achieve the organizational goals, that is to say, goals set by the company, not by workers and employees. The article is a critical review that deals with the concepts of operational efficiency (good job performance) and interactive efficiency (good organizational climate) in the perspective of organizational coexistence, and reaffirms the concept expressed by Bass (1960) that without interactive efficiency, operational efficiency is less likely to be achieved.
description: Italian Sociological Review, Vol. 13 No. 2 (2023)
Burning rate for a solid propellant ramjet developing constant thrust
Creators: name: Arbo, Paul Edward
Publisher: name: California Institute of Technology
Year: 1952
Subjects: Aeronautics

description: An analysis of a solid propellant ramjet which carries the propellant in the combustion chamber was made, and a procedure outlined for calculating the required burning rate of such a ramjet which develops constant thrust. The two factors which influenced this development were:

1) The solid propellant ramjet’s combustion chamber varies in size with time due to burning of the fuel.
2) The solid propellant ramjet develops constant thrust.

These factors were coordinated with the analysis of the internal flow system of the ramjet, and an expression for the required burning rate was derived.
Use of Digital Social Media at Night, Awareness of the Associated Risks, Beliefs and Driving Factors
Creators: name: Adeoye, Adeponle Olayode
name: Jegede, Ayodele Samuel
Publisher: name: Italian Sociological Review
Year: 2023

description: Studies have reported the effects of using digital social media (DSM) platforms at night on sleep and health. However, there is paucity of studies on awareness of the risks and determinants of this behaviour. This study examined awareness about the risks associated with nocturnal use of DSM and factors driving its use at night. Twenty in-depth interviews were conducted in Ibadan North Local Government Area of Oyo State to assess awareness of DSM users about the risks associated with nocturnal use of DSM, beliefs about nocturnal use of DSM, activities driving the use of the platform at night and quality of sleep of DSM users. Data analysis involved verbatim transcription, content analysis and thematic organization of responses. Users were aware of the risks associated with the nocturnal use of DSM but there was the lack of willingness to take them serious among some users. Participants believe that the use of DSM at night is a form of leisure. Networking, social obligations, engagements at daytime, free and affordable internet data were the identified factors driving nocturnal use of DSM. The study concluded that users were aware of the risks associated with the nocturnal use of DSM but the willingness to take them serious differ among them. Social activities are the drivers of nocturnal use of DSM, predisposing users to poor sleep and its effects. These findings suggest the need for more sensitization about the benefits of adequate sleep at night on health to reduce risky behaviours that may affect sleep such as nocturnal use of DSM.
description: Italian Sociological Review, Vol. 13 No. 2 (2023)