cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Studies of radiant heat transfer from pure gases
Creators: name: Benitez, L. E.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: This report contains an outline of some of the experimental measurements and theoretical considerations which are required for the calculation of the emissivity of nitric oxide. Because of lack of suitable apparatus, the experimental part of the program was restricted to the determination of apparent absorption coefficients for the fundamental vibration-rotation band of nitric oxide. Theoretical calculations of emissivity were originally suggested by Dr. Martin Summerfield.  The present calculations were made by the use of an approximate procedure which has been developed recently at the Jet Propulsion Laboratory by S. S. Penner for the determination of the emissivity of pure diatomic gases. The results presented in this report facilitate making approximate estimates of the emissivity of nitric oxide as a function of temperature and optical density. For these emissivity calculations it is recommended to correct the experimentally determined apparent absorption coefficients by analogy with available data for carbon monoxide.
The 22-Year Hale Cycle in Cosmic Ray Flux - Evidence for Direct Heliospheric Modulation
Creators: name: Thomas, Simon R
name: Owens, Mathew J
name: Lockwood, Mike
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The ability to predict times of greater galactic cosmic ray (GCR) fluxes is important for reducing the hazards caused by these particles to satellite communications, aviation, or astronauts. The 11-year solar cycle variation in cosmic rays is highly correlated with the strength of the heliospheric magnetic field. Differences in GCR flux during alternate solar cycles yield a 22-year cycle, known as the Hale Cycle, which is thought to be due to different particle drift patterns when the northern solar pole has predominantly positive (denoted a qA>0 cycle) or negative (qA<0) polarities. This results in the onset of the peak cosmic ray flux at Earth occurring earlier during qA>0 cycles than for qA<0 cycles and hence the peak being more domed for qA>0 and more sharply peaked for qA<0. In this study, we demonstrate that properties of the large-scale heliospheric magnetic field are different during the declining phase of the qA<0 and qA>0 solar cycles, when the difference in GCR flux is most apparent. This suggests that particle drifts may not be the sole mechanism responsible for the Hale Cycle in GCR flux at Earth. However, it is also demonstrated that these polarity-dependent heliospheric differences are evident during the space-age but much less clear in earlier data: using geomagnetic reconstructions, it is shown that for the period of 1905 - 1965, alternate polarities do not give as significant a difference during the declining phase of the solar cycle. Thus we suggest that the 22-year cycle in cosmic ray flux is at least partly the result of direct modulation by the heliospheric magnetic field and that this effect may be primarily limited to the grand solar maximum of the space-age.
description: 16 pages, 7 figures
Experimental determination of the thermal conductivity of porous copper
Creators: name: Pinkerton, Charles C.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: The techniques of powder metallurgy have produced porous variations of the metals copper, steel and nickel. The proposed application of these porous metals in the sweat-cooling of jet propulsion engines demands an exact knowledge of their thermal as well as their physical properties.

This thesis presents an experimental determination of the thermal conductivity of copper as a function of porosity, and an insight into the way this conductivity depends on temperature.

The experiments were performed on a simplified version of the apparatus used by the Bureau of Standards for solid metals. Four copper specimens varying in porosity from 22 to 42 per cent were measured. The results obtained are consistent with those predicted by other investigators from entirely different considerations.

The results are summarized in two graphs. The first shows temperature versus thermal conductivity. The second gives thermal conductivity versus porosity. It is shown that porosity largely determines thermal conductivity while temperature is distinctly a second-order influence. An analytical expression for the variation of thermal conductivity with porosity is introduced, and general agreement with the experimental results is noted.
Dualities and bosonization of massless fermions in three dimensional space-time
Creators: name: Moreno, E. F.
name: Schaposnik, F. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the bosonization of massless fermions in three-dimensional space-time. Using the path-integral approach as well as the operator formalism, we investigate new duality relations between fermionic and bosonic theories. In particular, we show that a theory of massless fermions is dual to three different, but equivalent bosonic theories which are quadratic in the bosonic fields: a non-local Maxwell- Chern-Simons-type theory, a non-local self-dual-type vector theory, and a local free massless bosonic theory. The equivalence is proven at the level of current correlation functions and current algebra analysis.
description: 12 pages
Equation-of-state-independent relations in neutron stars
Creators: name: Maselli, Andrea
name: Cardoso, Vitor
name: Ferrari, Valeria
name: Gualtieri, Leonardo
name: Pani, Paolo
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Neutron stars are extremely relativistic objects which abound in our universe and yet are poorly understood, due to the high uncertainty on how matter behaves in the extreme conditions which prevail in the stellar core. It has recently been pointed out that the moment of inertia I, the Love number lambda and the spin-induced quadrupole moment Q of an isolated neutron star, are related through functions which are practically independent of the equation of state. These surprising universal I-lambda-Q relations pave the way for a better understanding of neutron stars, most notably via gravitational-wave emission. Gravitational-wave observations will probe highly-dynamical binaries and it is important to understand whether the universality of the I-lambda-Q relations survives strong-field and finite-size effects. We apply a Post-Newtonian-Affine approach to model tidal deformations in compact binaries and show that the I-lambda relation depends on the inspiral frequency, but is insensitive to the equation of state. We provide a fit for the universal relation, which is valid up to a gravitational wave frequency of ~900 Hz and accurate to within a few percent. Our results strengthen the universality of I-lambda-Q relations, and are relevant for gravitational-wave observations with advanced ground-based interferometers. We also discuss the possibility of using the Love-compactness relation to measure the neutron-star radius with an uncertainty of about 10% or smaller from gravitational-wave observations.
description: 5 pages, 2 figures, 2 tables
Introduction to heavy ion physics with avenues to sPHENIX
Creators: name: Hemmick, Thomas
Publisher: name: Zenodo
Year: 2021
Subjects: rhic
heavy ion
qcd
phenix
sphenix
school21

description: Broad introduction into Heavy Ion Physics, and the role of the sPHENIX experiment at RHIC. Presented at the PHENIX School in 2021.
Fluctuational internal Josephson effect in topological insulator film
Creators: name: Efimkin, Dmitry K.
name: Lozovik, Yurii E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Tunneling between opposite surfaces of topological insulator thin film populated by electrons and holes is considered. We predict considerable enhancement of tunneling conductivity by Cooper electron-hole pair fluctuations that are precursor of their Cooper pairing. Cooper pair fluctuations lead to the critical behavior of tunneling conductivity in vicinity of critical temperature with critical index ν=2. If the pairing is suppressed by disorder the behavior of tunneling conductivity in vicinity of quantum phase transition is also critical with the index μ=2. The effect can be interpreted as fluctuational internal Josephson effect and it is general phenomenon for electron-hole bilayers. The peculiarities of the effect in other realizations of electron-hole bilayer are discussed.
description: 8 pages and 7 figures. Extended version accepted to Phys. Rev. B
Nonequilibrium Kondo transport through a quantum dot in a magnetic field
Creators: name: Smirnov, Sergey
name: Grifoni, Milena
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze universal transport properties of a strongly interacting quantum dot in the Kondo regime when the quantum dot is placed in an external magnetic field. The quantum dot is described by the asymmetric Anderson model with the spin degeneracy removed by the magnetic field resulting in the Zeeman splitting. Using an analytical expression for the tunneling density of states found from a Keldysh effective field theory, we obtain in the whole energy range the universal differential conductance and analytically demonstrate its Fermi-liquid and logarithmic behavior at low- and high-energies, respectively, as a function of the magnetic field. We also show results on the zero temperature differential conductance as a function of the bias voltage at different magnetic fields as well as results on finite temperature effects out of equilibrium and at a finite magnetic field. The modern nonequilibrium experimental issues of the critical magnetic field, at which the zero bias maximum of the differential conductance starts to split into two maxima, as well as the distance between these maxima as a function of the magnetic field are also addressed.
description: Published version; First submission to NJP: 27.03.2013; Second submission to NJP: 06.05.2013
Electronic phase separation in iron pnictides
Creators: name: Sboychakov, A. O.
name: Rozhkov, A. V.
name: Kugel, K. I.
name: Rakhmanov, A. L.
name: Nori, Franco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A mechanism for electronic phase separation in iron pnictides is proposed. It is based on the competition between commensurate and incommensurate spin-density-wave phases in a system with an imperfect doping-dependent nesting of a multi-sheeted Fermi surface. We model the Fermi surface by two elliptical electron pockets and three circular hole pockets. The interaction between a charge carrier in a hole band and a carrier in an electron band leads to the formation of spin-density-wave order. The commensurate spin density wave in the parent compound transforms to the incommensurate phase when doping is introduced. We show that, for certain parameter values, the uniform state is unstable with respect to phase separation. The resulting inhomogeneous state consists of regions of commensurate and incommensurate spin-density-wave phases. Our results are in qualitative agreement with recent observations of incommensurate spin density waves and electronic inhomogeneity in iron pnictides.
description: 11 pages, 4 figures, RevTeX, the revised version of arXiv:1304.2175 taking into account remarks of the referees
Phenomenological Aspects of R-parity Violating Supersymmetry with A Vector-like Extra Generation
Creators: name: Chang, Xue
name: Liu, Chun
name: Tang, Yi-Lei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Phenomenological analysis to the R-parity violating supersymmetry with a vector-like extra generation is performed in detail. It is found that, via the trilinear couplings, the correct neutrino spectrum can be obtained. The Higgs mass rises to 125 GeV by new up-type Yukawa couplings of vector-like quarks with no need of very heavy superpartners. Phenomena of new heavy fermions at LHC are predicted.
description: 30 pages, 1 table, 7 figures. Accepted for publication in Phys. Rev. D
A correlation of repeated tension impact tests with other tension tests of 17ST duralumin
Creators: name: Lee, Edwin Samuel
name: Sterling, Cedric Warren
Publisher: name: California Institute of Technology
Year: 1943
Subjects: Aeronautics
Aeronautical Engineering

description: The strain distribution after repeated tension impacts along the length of several differently dimensioned specimens of 17ST Duralumin is determined for various energies per blow. An attempt is made to determine a relationship between the one energy available per blow, the dimensions of the specimen, and the number of blows required to cause failure of the specimen by repeated tension impacts. A relationship is determined between the percent total elongation and the length-to-diameter ratio. A relationship is determined between the energy per unit volume required to cause failure and the length-to-diameter ratio under static tension, dynamic tension, and repeated tension impact conditions. A “Modulus of Destructiveness" is proposed for 17ST duralumin. A method is presented for predicting the number of repeated tension impact blows necessary to cause failure of a part.
Geology of a portion of the south side of the Santa Clara Valley near Newhall, California
Creators: name: Hagen, Robert Christian
Publisher: name: California Institute of Technology
Year: 1939
Subjects: subject: Placerita Canyon
subject: Humphreys Quadrangle
subject: Mint Cany
subject: Sylmar Quadrangle
subject: Santa Clara River
subject: Geology
subject: FOS: Earth and related environmental sciences

description: The area is located between the foot of the San Gabriel
Mountains and the Santa Clara River and is about four miles
east of Newhall and Saugus, California. It is about thirty-six miles north of Los Angeles, California.

The area is approximately two by two and a half miles in
size and contains about five square miles. It is bounded on
the north by the Santa Clara River; on the east, by the area
worked by John A. Battle; on the south, by the San Gabriel
Mountains and Placerita Canyon; and on the west, by Longitude 118 28'.

The area is conveniently reached by one of two roads.
The side to the north is reached from the Palmdale-Los Angeles State Highway which runs along the northern boundary. Someday this highway will pass through the area. From this highway, dirt roads lead towards the center of the area, passing through the valleys draining into the Santa Clara River. The south side is entered by means of the Placerita Canyon Road which turns off just north of the outskirts of Newhall. This road is paved part way, but is dirt the rest of the way. It is, however, passable, and makes it easy to get into the southern end. From this road, the center of the area can be reached by hiking up abandoned roads and trails. No part of the area is more than one mile's hike to reach.
Strain mediated suppression of the metal-insulator transition in EuNiO3 thin films
Creators: name: Meyers, D.
name: Middey, S.
name: Kareev, M.
name: van Veenendaal, M.
name: Moon, E. J.
name: Gray, B. A.
name: Freeland, J. W.
name: Chakhalian, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ultrathin epitaxial films of EuNiO3 were grown on a series of substrates traversing highly compressive (- 2.4%) to highly tensile (2.5%) lattice mismatch. X-ray diffraction measurements showed the expected c-lattice parameter shift for compressive strain, but no detectable shift for tensilely strained substrates, while reciprocal space mapping confirmed the tensile strained film maintained epitaxial coherence. Transport measurements showed a successively (from tensile to compressive) lower resistance and a complete suppression of the metalinsulator transition at highly compressive lattice mismatch. Corroborating these findings, X-ray absorption spectroscopy measurements revealed a strong multiplet splitting in the tensile samples that progressively weakens with increasing compressive strain that, combined with cluster calculations, showed enhanced covalence between Ni-d and O-p orbitals leads to the metallic state.
Transverse Single Spin Asymmetry in $e+p^\uparrow \to e+J/ψ+X $ and Transverse Momentum Dependent Evolution of the Sivers Function
Creators: name: Godbole, Rohini M.
name: Misra, Anuradha
name: Mukherjee, Asmita
name: Rawoot, Vaibhav S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend our analysis of transverse single spin asymmetry (SSA) in electroproduction of $J/ψ$ to include the effect of the scale evolution of the transverse momentum dependent (TMD) parton distribution functions and gluon Sivers function. We estimate SSA for JLab, HERMES, COMPASS, and eRHIC energies using the color evaporation model of charmonium production, using an analytically obtained approximate solution of TMD evolution equations discussed in the literature. We find that there is a reduction in the asymmetry compared with our predictions for the earlier case considered by us, wherein the $Q^2$ dependence came only from DGLAP evolution of the unpolarized gluon densities and a different parametrization of the TMD Sivers function was used.
description: 12 pages, 6 figures. arXiv admin note: text overlap with arXiv:1201.1066
Supplementary Material, contents from The problematic Cambrian arthropod Tuzoia and the origin of mandibulates revisited
Creators: name: Izquierdo-López, Alejandro
name: Caron, Jean-Bernard
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences
subject: 60301 Animal Systematics and Taxonomy
subject: 60310 Plant Systematics and Taxonomy

description: The origin of mandibulates, the hyperdiverse arthropod group that includes pancrustaceans and myriapods, dates back to the Cambrian. Bivalved arthropod groups such as hymenocarines have been argued to be early mandibulates, but many species are still poorly known, and their affinities remain uncertain. One of the most common and globally distributed Cambrian bivalved arthropods is Tuzoia. Originally described in 1912 from the Burgess Shale based on isolated carapaces, its full anatomy has remained largely unknown. Here, we describe new specimens of Tuzoia from the Canadian Burgess Shale (Wuliuan, Cambrian) showcasing exceptionally preserved soft tissues, allowing for the first comprehensive reconstruction of its anatomy, ecology and evolutionary affinities. The head bears antennae and differentiated cephalic appendages. The body is divided into a cephalothorax and a homonomous trunk bearing ca 10 pairs of legs with heptopodomerous endopods and enlarged basipods, and two pairs of caudal rami form a tail fan. These traits suggest that Tuzoia swam along the seafloor and used its spinose legs for predation or scavenging. Tuzoia is retrieved by a Bayesian phylogenetic analysis as an early mandibulate hymenocarine lineage, exemplifying the rapid diversification of this group in open marine environments during the Cambrian Explosion.
Unraveling of the fractional topological phase in one-dimensional flatbands with nontrivial topology
Creators: name: Budich, Jan Carl
name: Ardonne, Eddy
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider a topologically non-trivial flat band structure in one spatial dimension in the presence of nearest and next nearest neighbor Hubbard interaction. The non-interacting band structure is characterized by a symmetry protected topologically quantized Berry phase. At certain fractional fillings, a gapped phase with a filling-dependent ground state degeneracy, and fractionally charged quasi-particles emerges. At filling 1/3, the ground states carry a fractional Berry phase in the momentum basis. These features at first glance suggest a certain analogy to the fractional quantum Hall scenario in two dimensions. We solve the interacting model analytically in the physically relevant limit of a large band gap in the underlying band structure, the analog of a lowest Landau level projection. Our solution affords a simple physical understanding of the properties of the gapped interacting phase. We pinpoint crucial differences to the fractional quantum Hall case by studying the Berry phase and the entanglement entropy associated with the degenerate ground states. In particular, we conclude that the `fractional topological phase in one-dimensional flatbands' is not a one-dimensional analog of the two-dimensional fractional quantum Hall states, but rather a charge density wave with a nontrivial Berry phase. Finally, the symmetry protected nature of the Berry phase of the interacting phase is demonstrated by explicitly constructing a gapped interpolation to a state with a trivial Berry phase.
description: Final version
Measurement of masses in the t t-bar system by kinematic endpoints in pp collisions at sqrt(s) = 7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for t t-bar events selected in the dilepton final state from a data sample corresponding to an integrated luminosity of 5.0 inverse femtobarns collected by the CMS experiment in pp collisions at sqrt(s) = 7 TeV. The analysis is based on endpoint determinations in kinematic distributions. When the neutrino and W-boson masses are constrained to their world-average values, a top-quark mass value of M[t] = 173.9 +/- 0.9 (stat.) +1.7/-2.1 (syst.) GeV is obtained. When such constraints are not used, the three particle masses are obtained in a simultaneous fit. In this unconstrained mode the study serves as a test of mass determination methods that may be used in beyond standard model physics scenarios where several masses in a decay chain may be unknown and undetected particles lead to underconstrained kinematics.
description: Replaced with published version. Added journal reference and DOI
Correction of a proof in "Connes' embedding conjecture and sums of hermitian squares"
Creators: name: Burgdorf, Sabine
name: Dykema, Ken
name: Klep, Igor
name: Schweighofer, Markus
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L10 (Primary) 11E25, 13J30 (Secondary)

description: We show that Connes' embedding conjecture (CEC) is equivalent to a real version of the same (RCEC). Moreover, we show that RCEC is equivalent to a real, purely algebraic statement concerning trace positive polynomials. This purely algebraic reformulation of CEC had previously been given in both a real and a complex version in a paper of the last two authors. The second author discovered a gap in this earlier proof of the equivalence of CEC to the real algebraic reformulation (the proof of the complex algebraic reformulation being correct). In this note, we show that this gap can be filled with help of the theory of real von Neumann algebras.
description: This correction fills a gap in the article arXiv:math/0607615 by the last two authors published in Advances in Mathematics 217, No. 4, 1816-1837 (2008). (The first version of this correction contained itself a gap in the proof that (iv) implies (i) in Proposition 3.2.)
When the Higgs meets the Top: Search for t --> ch^0 at the LHC
Creators: name: Chen, Kai-Feng
name: Hou, Wei-Shu
name: Kao, Chung
name: Kohda, Masaya
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The newly discovered "Higgs" boson h^0, being lighter than the top quark t, opens up new probes for flavor and mass generation. In the general two Higgs doublet model, new ct, cc and tt Yukawa couplings could modify h^0 properties. If t --> ch^0 occurs at the percent level, the observed ZZ^* and γγsignal events may have accompanying cbW activity coming from t\bar{t} feeddown. We suggest that t --> ch^0 can be searched for via h^0 --> ZZ^*, γγ, WW^* and b\bar{b}, perhaps even τ^+τ^- modes in t\bar{t} events. Existing data might be able to reveal some clues for t --> ch^0 signature, or push the branching ratio B(t --> ch^0) down to below the percent level.
description: 5 pages, 3 figures, version to appear in PLB
Entwicklung interaktives Quiz für das Verkehrshaus
Creators: name: Ellenberger, Sarah
Publisher: name: Hochschule für Life Sciences FHNW
Year: 2023
Subjects: subject: 370 - Erziehung, Schul- und Bildungswesen

description: Im Verkehrshaus Luzern (Museum) ist eine neue Ausstellung zum Thema «Mobilität und Inklusion von Menschen mit einer körperlichen Beeinträchtigung» geplant. Im Rahmer dieser Arbeit wurde ein Ausstellungselement, welches das Thema der Inklusion aufarbeiten soll, entwickelt. Die Arbeit gliedert sich in zwei Kernelemente: der Erarbeitung des Wissens, welches an die Besucher weiter gegeben wird und in die technische Entwicklung eines Prototyps. Der Prototyp ist ein interaktives Quiz-Spiel, wo die Besucher Fragen zum Thema körperliche Beeinträchtigung beantworten können.
On the Growth of Cities: Human Capital and Portfolio Rebalancing
Creators: name: Lin, Yu Peng
Publisher: name: Zenodo
Year: 2021
Subjects: City growth
portfolio rebalancing
manufacturing belt

description: This research aims to present a conceptual framework relating a city’s industry mix to the population growth and its human capital stock. The author argues that when an industry matures or shows signs of decline, a better-managed city can quickly identify other potential industries to sustain its growth. The city has a greater likelihood of upgrading its workforce and improving the quality of its human capital. Better quality human capital in turn helps to advance the city’s industry planning and sustain its economic position. The suggestive evidence from a sample of eight manufacturing-belt cities and a case study on the city of Detroit follows the conjecture of the framework. When a city exercises a meaningful industry strategy and rebalancing, the educational attainment/human capital of its adult population improves. In turn, the better-quality human capital improves a city’s industry mix and reinforces its economic position. While the city of Detroit’s financial insolvency has been examined by researchers from various fields and several factors are considered attributable to the event, the author believes the center of all issues is merely the city’s lack of a diversification strategy. While the auto industry did deliver Detroit a period of prosperity, this over-reliance on one industry inevitably brought financial difficulties on the city, as the industry matures along with increased competition. This unfortunate outcome derived from a non-diversifying strategy is well predicted by the Portfolio theory. Thus, the author believes that with an appropriate strategy of diversification, the city of Detroit could largely avoid its financial insolvency. This study suggests at least two avenues that warrant future research. First, although it is well recognized that a city’s growth and decline is highly related to the life cycle of its industries, there is very little scholarly effort to systematically analyze this issue in the context of the Portfolio Theory. The current effort could stimulate research attention toward this direction. Second, a systematic analysis on the factors that contribute to a city’s economic development is much needed.
Far-IR Emission From Dust-Obscured Galaxies
Creators: name: Calanog, J. A.
name: Wardlow, J.
name: Fu, Hai
name: Cooray, A.
name: Assef, R. J.
name: Bock, J.
name: Casey, C. M.
name: Conley, A.
name: Farrah, D.
name: Ibar, E.
name: Kartaltepe, J.
name: Magdis, G.
name: Marchetti, L.
name: Oliver, S. J.
name: Perez-Fournon, I.
name: Riechers, D.
name: Rigopoulou, D.
name: Roseboom, I. G.
name: Schulz, B.
name: Scott, Douglas
name: Symeonidis, M.
name: Vaccari, M.
name: Viero, M.
name: Zemcov, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dust-obscured galaxies (DOGs) are a UV-faint, IR-bright galaxy population that reside at z~2 and are believed to be in a phase of dusty star-forming and AGN activity. We present far-IR observations of a complete sample of DOGs in the 2 deg2 of COSMOS. The 3077 DOGs have =1.9+/-0.3 and are selected from 24um and r+ observations using a color cut of r+ - [24]>=7.5 (AB mag) and S24>=100uJy. Based on the near-IR SEDs, 47% are star-formation dominated and 10% are AGN-dominated. We use SPIRE far-IR photometry from HerMES to calculate the IR luminosity and characteristic dust temperature for the 1572 (51%) DOGs that are detected at 250um (>=3σ). For the remaining 1505 (49%) that are undetected, we perform a median stacking analysis to probe fainter luminosities. Detected and undetected DOGs have average IR luminosities of (2.8+/-0.4) x 1012 LSun and (0.77+-0.08)x10^12LSun, and dust temperatures of 34+/-7 K and 37+/-3 K, respectively. The IR luminosity function of DOGs with S24>=100uJy is calculated, using far-IR observations and stacking. DOGs contribute 10-30% to the total star formation rate density of the Universe at z=1.5-2.5, dominated by 250um detected and bump DOGs. For comparison, DOGs contribute 30% to the star-formation rate density of the Universe for all galaxies at z=1.5-2.5 with S24>=100uJy. DOGs have a large scatter about the star-formation main sequence and their specific star-formation rates show that the observed phase of star-formation could be responsible for their observed stellar mass at z~2.
description: 11 Pages, 9 figures, ApJ accepted
Friction forces on phase transition fronts
Creators: name: Megevand, Ariel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In cosmological first-order phase transitions, the microscopic interaction of the phase transition fronts with non-equilibrium plasma particles manifests itself macroscopically as friction forces. In general, it is a nontrivial problem to compute these forces, and only two limits have been studied, namely, that of very slow walls and, more recently, ultra-relativistic walls which run away. In this paper we consider ultra-relativistic velocities and show that stationary solutions still exist when the parameters allow the existence of runaway walls. Hence, we discuss the necessary and sufficient conditions for the fronts to actually run away. We also propose a phenomenological model for the friction, which interpolates between the non-relativistic and ultra-relativistic values. Thus, the friction depends on two friction coefficients which can be calculated for specific models. We then study the velocity of phase transition fronts as a function of the friction parameters, the thermodynamic parameters, and the amount of supercooling.
description: 34 pages, 7 figures. v2: minor corrections
Muon spin rotation studies of niobium for superconducting RF applications
Creators: name: Grassellino, A.
name: Beard, C.
name: Kolb, P.
name: Laxdal, R.
name: Lockyer, N. S.
name: Longuevergne, D.
name: Sonier, J. E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: In this work we investigate superconducting properties of niobium samples via application of the muon spin rotation/relaxation (muSR) technique. We employ for the first time the muSR technique to study samples that are cutout from large and small grain 1.5 GHz radio frequency (RF) single cell niobium cavities. The RF test of these cavities was accompanied by full temperature mapping to characterize the RF losses in each of the samples. Results of the muSR measurements show that standard cavity surface treatments like mild baking and buffered chemical polishing (BCP) performed on the studied samples affect their surface pinning strength. We find an interesting correlation between high field RF losses and field dependence of the sample magnetic volume fraction measured via muSR. The muSR line width observed in ZF-muSR measurements matches the behavior of Nb samples doped with minute amounts of Ta or N impurities. An upper bound for the upper critical field Hc2 of these cutouts is found.
description: 20 pages, 14 figures
Gravitating vortons as ring solitons in general relativity
Creators: name: Kunz, Jutta
name: Radu, Eugen
name: Subagyo, Bintoro
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Vortons can be viewed as (flat space-) field theory analogs of black rings in general relativity. They are made from loops of vortices, being sustained against collapse by the centrifugal force. In this work we discuss such configurations in the global version of Witten's U(1)xU(1) theory. We first consider solutions in a flat spacetime background and show their non-uniqueness. The inclusion of gravity leads to new features. In particular, an ergoregion can occur. Also, similar to boson stars, we show that the vortons exist only in a limited frequency range. The coupling to gravity gives rise to a spiral-like frequency dependence of the mass and charge. New solutions of the model describing 'semitopological vortons' and 'di-vortons' are also discussed.
description: 34 pages, 19 figures
Künstler, Freund und Zeitgenosse. Zur Porträtdarstellung bei Georg Schrimpf und seines Umkreises in den 20er Jahren
Creators: name: Oellers, Adam C.
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 54-55 (1986-1987): Aachener Kunstblätter
Comparison of post-Newtonian templates for extreme mass ratio inspirals
Creators: name: Varma, Vijay
name: Fujita, Ryuichi
name: Choudhary, Ashok
name: Iyer, Bala R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Extreme mass ratio inspirals (EMRIs), the inspirals of compact objects into supermassive black holes, are important gravitational wave sources for the Laser Interferometer Space Antenna (LISA). We study the performance of various post-Newtonian (PN) template families relative to the high precision numerical waveforms in the context of EMRI parameter estimation with LISA. Expressions for the time domain waveforms TaylorT1, TaylorT2, TaylorT3, TaylorT4 and TaylorEt are derived up to 22PN order, i.e $\mathcal{O}(v^{44})$ ($v$ is the characteristic velocity of the binary) beyond the Newtonian term, for a test particle in a circular orbit around a Schwarzschild black hole. The phase difference between the above 22PN waveform families and numerical waveforms are evaluated during two-year inspirals for two prototypical EMRI systems with mass ratios $10^{-4}$ and $10^{-5}$. We find that the dephases (in radians) for TaylorT1 and TaylorT2, respectively, are about $10^{-9}$ ($10^{-2}$) and $10^{-9}$ ($10^{-3}$) for mass ratio $10^{-4}$ ($10^{-5}$). This suggests that using 22PN TaylorT1 or TaylorT2 waveforms for parameter estimation of EMRIs will result in accuracies comparable to numerical waveform accuracy for most of the LISA parameter space. On the other hand, from the dephase results, we find that TaylorT3, TaylorT4 and TaylorEt fare relatively poorly as one approaches the last stable orbit. This implies that, as for comparable mass binaries using the 3.5PN phase of waveforms, the 22PN TaylorT3 and TaylorEt approximants do not perform well enough for the EMRIs. The reason underlying the poor performance of TaylorT3, TaylorT4 and TaylorEt relative to TaylorT1 and TaylorT2 is finally examined.
description: 10 pages
title: Entwicklung einer Lernsoftware für das Fach "Pathologie"
Creators: name: Neemann, Jannes
Publisher: name: Hochschule Hannover
Year: 2021
Subjects: subject: 610 Medizin, Gesundheit
subject: 004 Informatik

description: In der Arbeit wird untersucht, wie Aufgaben im pathologischen Kontext automatisiert bewertet und für die Lernenden lernförderliches Feedback generiert werden kann. Dafür wurde eine Lernsoftware entwickelt, welche das Erstellen und automatisierte Bewerten der Aufgaben ermöglicht. Das Feedback informiert die Lernenden nicht nur darüber, ob eine Aufgabe richtig oder falsch gelöst worden ist, sondern unterstützt auch bei der Findung der richtigen Lösung. Hierzu wurde untersucht, wie das Feedback in einer Lernsoftware aufgebaut sein muss, um den Lernerfolg zu fördern. Auf dieser Grundlage wurden mit den Stakeholdern der Medizinischen Hochschule Hannover die Anforderungen an die Lernsoftware definiert und umgesetzt.
Advanced Study on Economic Structural Change and Economic Growth in Egypt
Creators: name: Elshamy, Hany M.
Publisher: name: Zenodo
Year: 2021
Subjects: Economic structural change
economic growth
Egypt

description: This paper reasons about the economic structural change and economic growth in Egypt amid the period 1983-2014. This paper utilizes the procedure of Vries et a. 2014. The paper utilizes the novel Penn World Table (PWT) adaptation 9 information base to cover the period somewhere around 1983 and 2014. It is found that there were economic structure changes amid the period 1983-2014 as the significance of the agriculture sector declined over the time, the significance of the industry sector expanded since to 1990, and the significance of the service sector expanded following 2000. Additionally, this exploration affirms that there is a solid connection (with a coefficient correlation of 85.11 percent) between the two series of employment and GDP growth rates. As indicated by the labour productivity deterioration the inside impact was constantly more noteworthy than the aggregate reallocation impact However, in the event that we take a gander at the two parts of the aggregate reallocation impact, unmistakably the dynamic reallocation impact has a major part in deciding the total productivity growth. Therefore, another strategy ought to be intended to support the voluntary labour movement crosswise over sectors and areas in Egypt.
The photino sector and a confining potential in a supersymetric Lorentz-symmetry-violating model
Creators: name: Belich, H.
name: Bernald, L. D.
name: Gaete, Patricio
name: Helayël-Neto, J. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the spectrum of the minimal supersymmetric extension of the Carroll-Field-Jackiw model for Electrodynamics with a topological Chern-Simons-like Lorentz-symmetry violating term. We identify a number of independent background fermion condensates, work out the gaugino dispersion relation and propose a photonic effective action to consider aspects of confinement induced by the SUSY background fermion condensates, which also appear to signal Lorentz-symmetry violation in the photino sector of the action. Our calculations of the static potential are carried out within the framework of the gauge-invariant but path-dependent variables formalism which are alternative to the Wilson loop approach. Our results show that the interaction energy contains a linear term leading to the confinement of static probe charges.
description: 11 pages, photino dispersion relation is extended to included the case the photino acquires mass through spontaneous SUSY breaking
Geologic report of Black Butte, Antelope Valley, California. Geologic report of Puente Hills, Puente, California
Creators: name: Van Dyke, Gilbert Rusk
Publisher: name: California Institute of Technology
Year: 1940
Subjects: subject: conglomerate
subject: upper Puente Formation
subject: shale
subject: Puente Hills
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Geologic report of Black Butte, Antelope Valley, California:

The Black Butte is a distinct hill among other remnant hills in the southern Antelope Valley. Nearly all the other buttes in the vicinity are grayish tan in color and consist of granite cut by numerous splite and pegmatite dikes. The Black Butte has, besides this granite massif, a cap of diorite which weathers black and hence gives the hill its name.

Geologic report of Puente Hills, Puente, California:

A portion of the Puente Hills west of the Pass and Covina Road and east of the town of Puente comprises the area. The structure under the hills are an anticline plunging to the west, a fault running north, and south through the center of the area, and overturning to the north of the eastern portion of the fold. Two rock types, shale and conglomerate, of upper Puente Formation of Upper Miocene time, comprise the area.
The role of exterior Weyl fluids on compact stellar structures in Randall-Sundrum gravity
Creators: name: Ovalle, J
name: Linares, F
name: Pasqua, A
name: Sotomayor, A
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of the Randall-Sundrum braneworld, the minimal geometric deformation approach (MGD) is used to generate a new physically acceptable interior solution to Einstein's field equations for a spherically symmetric compact distribution. This new solution is used to elucidate the role of exterior Weyl stresses from bulk gravitons on compact stellar distributions. We found strong evidences showing that the exterior dark radiation ${\cal U}^+$ always increases both the pressure and the compactness of stellar structures, and that the exterior "dark pressure" ${\cal P}^+$ always reduces them.
description: 14 pages, 1 figure. References added. Final version to appear in CQG
Utz, Clement; Westphalen, Klaus: GrammaDux - die lateinische Kurzgrammatik
Creators: name: Esders, Bettina
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Utz, Clement; Westphalen, Klaus: GrammaDux - die lateinische Kurzgrammatik. Bamberg: Buchner 1998 (ISBN3-7661-5240-8).
description: Forum Classicum, Nr. 4 (1998): Forum Classicum
title: Libri esemplari. Le biblioteche d’autore a Roma Tre
Creators: name: de Pasquale, Elena
name: Storari, Piera
Publisher: name: Roma TrE-Press
Year: 2022

description:

Il volume, nato grazie alla collaborazione di docenti, bibliotecarie e bibliotecari dell’Università degli Studi Roma Tre, presenta una serie di contributi critici sui fondi di persona conservati presso la nostra istituzione. Attraverso immagini e parole si potranno idealmente sfogliare le pagine dei libri di alcune delle biblioteche d’autore custodite a Roma Tre, interpretandole alla luce della vicenda biografica e intellettuale dei loro possessori, o considerandone gli aspetti biblioteconomici in funzione della loro tutela, fruizione e valorizzazione. Questi libri sono al contempo testimonianze archivistiche e documenti materiali, che raccontano storie di studi, ricerche, interessi, orientamenti, incontri, affetti e legami delle personalità che li hanno selezionati e raccolti. Ai saggi seguono le schede descrittive, compilate grazie a ricerche condotte attraverso fonti d’archivio, bibliografiche e orali. Viene così presentato il primo censimento delle biblioteche d’autore della nostra Università. In questo modo il volume intende anche fornire, in occasione del trentennale dalla sua nascita, un contributo e un’originale prospettiva di lettura della storia del nostro Ateneo.
Some classes of order α for second-order differential inequalities
Creators: name: Shiraishi, Hitoshi
name: Kuroki, Kazuo
name: Owa, Shigeyoshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C45

description: For analytic functions f(z) in the open unit disk U with f(0)=f'(0)-1=0, S. S. Miller and P. T. Mocanu (Integral Transform. Spec. Funct. 19(2008)) have considered some sufficient problems for starlikeness. The object of the present paper is to discuss some sufficient problems for f(z) to be in some classes of order α.
Anomaly Detection 1
Creators: name: , Luís
Publisher: name: Zenodo
Year: 2021

description: The datasets are: HDFS, Blue Gene/L (BGL), Thunderbird from [1] and [2]. The datasets are collected between 2004 and 2006 from real-world supercomputing systems. [1] A. Oliner and J. Stearley, “What supercomputers say: A study of five system logs,” in 37th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN’07). IEEE, 2007, pp. 575– 584. [1] S. He, J. Zhu, P. He, and M. R. Lyu, “Loghub: a large collection of system log datasets towards automated log analytics,” arXiv preprint arXiv:2008.06448, 2020.
Magnetic Field Focusing of Hyperfine Interaction in Hydrogen
Creators: name: Andreichikov, M. A.
name: Kerbikov, B. O.
name: Simonov, Yu. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We find a new correction to the hydrogen atom ground state hyperfine energy levels splitting in magnetic field. It can be interpreted as magnetic focusing of the wave function at the origin. The effect might be within the reach of experiment.
description: 8 pages, 3 figures
Graph-based research field analysis by the use of natural language processing: An overview of German energy research
Creators: name: Richarz, Jan
name: Wegewitz, Stephan
name: Henn, Sarah
name: Müller, Dirk
Publisher: name: RWTH Aachen University
Year: 2022
Subjects: subject: 600
subject: Keyword extraction
subject: Network analysis
subject: Research funding
subject: Research trends
subject: Text mining

description: 57 Seiten (2022).
The O_{D,D} Geometry of String Theory
Creators: name: Berman, David S.
name: Blair, Chris D. A.
name: Malek, Emanuel
name: Perry, Malcolm J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct an action for double field theory using a metric connection that is compatible with both the generalised metric and the O_{D,D} structure. The connection is simultaneously torsionful and flat. Using this connection one may construct a proper covariant derivative for double field theory. We then write the doubled action in terms of the generalised torsion of this connection. This action then exactly reproduces that required for doubled field theory and gauged supergravity.
description: 26 pages, latex, v2 typos corrected and references added
title: Great Lakes ice duration, winter severity index, cumulative freezing degree days, and atmospheric teleconnection patterns, 1973 – 2018
titleType: Other
Creators: name: Wang, Jia
name: Ting-Yi, Yang
name: Kessler, James
name: Hu, Haoguo
name: Chu, Philip
Publisher: name: Oceanic and Atmospheric Research Laboratories (U.S.), Great Lakes Environmental Research Laboratory
Year: 2020

description: NOAA Technical Memorandum GLERL ; 174