cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Kinetic Theory of the Presheath and the Bohm Criterion
Creators: name: Baalrud, S. D.
name: Hegna, C. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A kinetic theory of the Bohm criterion is developed that is based on positive-exponent velocity moments of the plasma kinetic equation. This result is contrasted with the conventional kinetic Bohm criterion that is based on a v^{-1} moment of the Vlasov equation. The salient difference between the two results is that low velocity particles dominate in the conventional theory, but are essentially unimportant in the new theory. It is shown that the derivation of the conventional kinetic Bohm criterion is flawed. Low velocity particles can cause unphysical divergences in the conventional theory. These divergent contributions are avoided with this new approach. The two theories are compared using example distribution functions from previous presheath models. The importance of ion-ion and electron-electron collisions to determining the particle distribution functions throughout the presheath is also discussed. A kinetic equation that accounts for wave-particle scattering by convective instabilities is used to show that ion-acoustic instabilities in the presheath of low temperature plasmas (where T_e \gg T_i) can cause both ions and electrons to obtain Maxwellian distribution functions near the sheath.
description: 28 pages, 6 figures
Search for gravitational wave ringdowns from perturbed intermediate mass black holes in LIGO-Virgo data from 2005-2010
Creators: name: Aasi, J.
name: Allen, Bruce
name: Ast, Stefan
name: Aufmuth, Peter
name: Danzmann, Karsten
name: Kaufer, S.
name: Lück, Harald
name: Meier, Tobias
name: Schnabel, R.
name: Vahlbruch, H.
name: Willke, Benno
name: Et Al.
name: LIGO Scientific Collaboration
name: Collaboration, Virgo
Publisher: name: College Park, MD : American Physical Society
Year: 2014
Subjects: subject: Gravitational waves
subject: Intermediate Mass Black Hole Binaries
subject: Gravitationswelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report results from a search for gravitational waves produced by perturbed intermediate mass black holes (IMBH) in data collected by LIGO and Virgo between 2005 and 2010. The search was sensitive to astrophysical sources that produced damped sinusoid gravitational wave signals, also known as ringdowns, with frequency 50≤f0/Hz≤2000 and decay timescale 0.0001≲τ/s≲0.1 characteristic of those produced in mergers of IMBH pairs. No significant gravitational wave candidate was detected. We report upper limits on the astrophysical coalescence rates of IMBHs with total binary mass 50≤M/M⊙≤450 and component mass ratios of either 1:1 or 4:1. For systems with total mass 100≤M/M⊙≤150, we report a 90% confidence upper limit on the rate of binary IMBH mergers with nonspinning and equal mass components of 6.9×10−8 Mpc−3 yr−1. We also report a rate upper limit for ringdown waveforms from perturbed IMBHs, radiating 1% of their mass as gravitational waves in the fundamental, ℓ=m=2, oscillation mode, that is nearly three orders of magnitude more stringent than previous results. © 2014 The American Physical Society
Three previously unrecognised classes of biosynthetic enzymes revealed during the production of xenovulene A
Creators: name: Schor, Raissa
name: Schotte, Carsten
name: Wibberg, Daniel
name: Kalinowski, Jörn
name: Cox, Russell J.
Publisher: name: London : Nature Publishing Group
Year: 2018
Subjects: subject: Acremonium strictum
subject: Alnus
subject: Aspergillus oryzae
subject: Sarocladium
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Xenovulene A is a complex fungal meroterpenoid, produced by the organism hitherto known as Acremonium strictum IMI 501407, for which limited biosynthetic evidence exists. Here, we generate a draft genome and show that the producing organism is previously unknown and should be renamed as Sarocladium schorii. A biosynthetic gene cluster is discovered which bears resemblance to those involved in the biosynthesis of fungal tropolones, with additional genes of unknown function. Heterologous reconstruction of the entire pathway in Aspergillus oryzae allows the chemical steps of biosynthesis to be dissected. The pathway shows very limited similarity to the biosynthesis of other fungal meroterpenoids. The pathway features: the initial formation of tropolone intermediates; the likely involvement of a hetero Diels-Alder enzyme; a terpene cyclase with no significant sequence homology to any known terpene cyclase and two enzymes catalysing oxidative-ring contractions. © 2018 The Author(s).
The tensor hypercontracted parametric reduced density matrix algorithm: coupled-cluster accuracy with O(r^4) scaling
Creators: name: Shenvi, Neil
name: Van Aggelen, Helen
name: Yang, Yang
name: Yang, Weitao
name: Schwerdtfeger, Christine
name: Mazziotti, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Tensor hypercontraction is a method that allows the representation of a high-rank tensor as a product of lower-rank tensors. In this paper, we show how tensor hypercontraction can be applied to both the electron repulsion integral (ERI) tensor and the two-particle excitation amplitudes used in the parametric reduced density matrix (pRDM) algorithm. Because only O(r) auxiliary functions are needed in both of these approximations, our overall algorithm can be shown to scale as O(r4), where r is the number of single-particle basis functions. We apply our algorithm to several small molecules, hydrogen chains, and alkanes to demonstrate its low formal scaling and practical utility. Provided we use enough auxiliary functions, we obtain accuracy similar to that of the traditional pRDM algorithm, somewhere between that of CCSD and CCSD(T).
description: 11 pages, 1 figure
Zeolite Synthesis under Insertion of Silica Rich Filtration Residues from Industrial Wastewater Reconditioning
Creators: name: Hartmann, Andrea
name: Petrov, V.
name: Buhl, Josef-Christian
name: Rübner, K.
name: Lindemann, M.
name: Prinz, C.
name: Zimathies, A.
Publisher: name: Delaware : Scientific Research Publishing Inc.
Year: 2014
Subjects: subject: Zeolites
subject: Superalkaline Conditions
subject: Filtration Residues
subject: Re-Use of Industrial Waste
subject: Reaction Kinetics
subject: Silica Residue
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: Zeolite synthesis was studied using two silica rich filtration residues (FR 1 and FR 2) as Si-source and sodium aluminate in a direct synthesis at 60°C at strong alkaline conditions (8 M - 16 M NaOH). In addition to these one-pot syntheses, a two-step process was investigated. Here, an alkaline digestion of FR at 60°C was followed by gel precipitation with sodium aluminate and gel crystallization under usual conditions of 80°C - 90°C. The results show that the substitution of chemical reagent sodium silicate by a waste material like FR as Si-source is possible but requires fine tuning of the reaction conditions as zeolite crystallization is a process under kinetic control. The solubility behaviour and impurities of the inserted filtration residues strongly influenced the course of reaction. Thus zeolites like hydrosodalite or intermediate zeolite between cancrinite and sodalite, or zeolite NaA or Z-21 in cocrystallization with hydrosodalite could be observed in the one pot syntheses already in a short time interval between 1 - 4 h depending on the alkalinity. The two step process yield to zeolites NaA and NaX in very good quality. The reaction process of FR in both reaction methods was characterized by chemical analyses, X-ray powder diffraction, Fourier transform infrared spectroscopy as well as scanning electron microscopy. Surface area and water content of selected products were further characterized by the BET-method and by thermogravimetry. Summing up the results, we can show that zeolite formation from filtration residues is possible by several reaction procedures as model cases for a re-use of industrial waste materials. Beside the importance for environmental protection, the reactions are of interest for zeolite chemistry as the re-use of FR is possible under economically conditions of low energy consumption at 60°C and short reaction periods.
Classification of complete projective special real surfaces
Creators: name: Cortés, Vicente
name: Dyckmanns, Malte
name: Lindemann, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C26 (Primary), 53A15 (Secondary)

description: We determine all complete projective special real surfaces. By the supergravity r-map, they give rise to complete projective special Kähler manifolds of dimension 6, which are distinguished by the image of their scalar curvature function. By the supergravity c-map, the latter manifolds define in turn complete quaternionic Kähler manifolds of dimension 16.
description: 30 pages
Search for gravitational waves from low mass compact binary coalescence in LIGO's sixth science run and Virgo's science runs 2 and 3
Creators: name: Abadie, J.
name: Affeldt, Christoph
name: Allen, Bruce
name: Aufmuth, Peter
name: Aulbert, C.
name: Ballardin, G.
name: Bauchrowitz, J.
name: Bertolini, A.
name: Bock, O.
name: Bogan, C.
name: Born, Michael
name: Breyer, J.
name: Brinkmann, M.
name: Britzger, M.
name: Dahl, K.
name: Danzmann, Karsten
name: Di Palma, Irene
name: Eberle, Tobias
name: Fehrmann, H.
name: Frede, M.
name: Friedrich, Daniel
name: Goetz, E.
name: Goßler, S.
name: Graef, C.
name: Grote, Hartmut
name: Hewitson, M.
name: Kaufer, Henning
name: Kawazoe, F.
name: Khalaidovski, Alexander
name: Kim, H.
name: Kranz, O.
name: Kringel, V.
name: Kühn, G.
name: Kwee, P.
name: Lastzka, N.
name: Leong, J.R.
name: Lück, Harald
name: Machenschalk, Bernd
name: Mazzolo, G.
name: Mehmet, Moritz
name: Meier, Tobias
name: Mossavi, K.
name: Müller-Ebhard, H.
name: Pickenpack, M.
name: Pletsch, H.J.
name: Pöld, J.
name: Prijatelj, M.
name: Prix, R
name: Puncken, O.
name: Röver, C.
name: Rüdiger, A.
name: Salemi, F.
name: Schilling, R.
name: Schnabel, Roman
name: Schreiber, E.
name: Schulz, B.
name: Shaltev, M.
name: Steinlechner, J.
name: Steinlechner, S.
name: Tarabrin, S.P.
name: Taylor, J.R.
name: Thüring, A.
name: Vahlbruch, H.
name: Veltkamp, C.
name: Wanner, A.
name: Weinert, M.
name: Wessels, P.
name: Westphal, Tobias
name: Wette, K.
name: Willke, Benno
name: Winkelmann, L.
name: Winkler, W.
name: Wittel, H.
name: Yamamoto, K.
name: Et Al.
name: LIGO Scientific Collaboration
name: Collaboration, Virgo
Publisher: name: College Park, MD : American Physical Society
Year: 2012
Subjects: subject: Gravitational waves
subject: Gravitationswelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report on a search for gravitational waves from coalescing compact binaries using LIGO and Virgo observations between July 7, 2009, and October 20, 2010. We searched for signals from binaries with total mass between 2 and 25M⊙; this includes binary neutron stars, binary black holes, and binaries consisting of a black hole and neutron star. The detectors were sensitive to systems up to 40 Mpc distant for binary neutron stars, and further for higher mass systems. No gravitational-wave signals were detected. We report upper limits on the rate of compact binary coalescence as a function of total mass, including the results from previous LIGO and Virgo observations. The cumulative 90% confidence rate upper limits of the binary coalescence of binary neutron star, neutron star-black hole, and binary black hole systems are 1.3×10−4, 3.1×10−5, and 6.4×10−6 Mpc−3 yr−1, respectively. These upper limits are up to a factor 1.4 lower than previously derived limits. We also report on results from a blind injection challenge. © 2012 The American Physical Society
Glyptacus fagineae Carmona 1972
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Acari
Eriophyidae
Glyptacus
Glyptacus fagineae

description: Glyptacus fagineae Carmona, 1972
 Glyptacus fagineae Carmona, 1972: 517–518.
 Glyptacus fagineae; Amrine & Stasny, 1994: 218.
 Glyptacus fagineae; Soika & Łabanowski, 2002a: 64.
 Host. Quercus faginea, Q. robur (Fagaceae).
 Relation to host. Vagrant.
 Distribution. Portugal, Poland.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 18, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
An improved chemical scheme for the reactions of atomic oxygen and simple unsaturated hydrocarbons - implications for star-forming regions
Creators: name: Occhiogrosso, Angela
name: Viti, Serena
name: Balucani, Nadia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent laboratory experiments have demonstrated that, even though contribution from other reaction channels cannot be neglected, unsaturated hydrocarbons easily break their multiple C-C bonds to form CO after their interactions with atomic oxygen. Here we present an upgraded chemical modelling including a revision of the reactions between oxygen atoms and small unsaturated hydrocarbons for different astrochemical environments. A first conclusion is that towards hot cores/corinos atomic oxygen easily degrades unsaturated hydrocarbons directly to CO or to its precursor species (such as HCCO or HCO) and destroys the double or triple bond of alkenes and alkynes. Therefore, environments rich in atomic oxygen at a relatively high temperature are not expected to be rich in large unsaturated hydrocarbons or polycyclic aromatic hydrocarbons. On the contrary, in O-poor and C-rich objects, hydrocarbon growth can occur to a large extent. In addition, new radical species, namely ketyl and vinoxy radicals, generated from other reaction channels can influence the abundances of hydrocarbons towards hot cores. We, therefore, suggest they should be included in the available databases. Hydrocarbon column densities are calculated in the 10(13)-10(15) cm(-2) range, in good agreement with their observed values, despite the small number of data currently published in the literature.
description: 9 pages, 2 figures, 6 tables, accepted by MNRAS
Host Star Properties and Transit Exclusion for the HD 38529 Planetary System
Creators: name: Henry, Gregory W.
name: Kane, Stephen R.
name: Wang, Sharon X.
name: Wright, Jason T.
name: Boyajian, Tabetha S.
name: von Braun, Kaspar
name: Ciardi, David R.
name: Dragomir, Diana
name: Farrington, Chris
name: Fischer, Debra A.
name: Hinkel, Natalie R.
name: Howard, Andrew W.
name: Jensen, Eric
name: Laughlin, Gregory
name: Mahadevan, Suvrath
name: Pilyavsky, Genady
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The transit signature of exoplanets provides an avenue through which characterization of exoplanetary properties may be undertaken, such as studies of mean density, structure, and atmospheric composition. The Transit Ephemeris Refinement and Monitoring Survey (TERMS) is a program to expand the catalog of transiting planets around bright host stars by refining the orbits of known planets discovered with the radial velocity technique. Here we present results for the HD 38529 system. We determine fundamental properties of the host star through direct interferometric measurements of the radius and through spectroscopic analysis. We provide new radial velocity measurements that are used to improve the Keplerian solution for the two known planets, and we find no evidence for a previously postulated third planet. We also present 12 years of precision robotic photometry of HD 38529 that demonstrate the inner planet does not transit and the host star exhibits cyclic variations in seasonal mean brightness with a timescale of approximately six years.
description: 10 pages, 6 figures, 4 tables, accepted for publication in ApJ
Performance Analysis of Security Certificate Management System in Vehicle-to-Everything (V2X)
Creators: name: Chen, Abel C. H.
name: Liu, Cheng-Kang
name: Lin, Chun-Feng
name: Lin, Bon-Yeh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Networking and Internet Architecture (cs.NI)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In Vehicle-to-Everything (V2X) communications, providing accurate information and safeguarding the privacy of end entities is one of the crucial information security issues. Therefore, several international standardization organizations have begun to develop V2X communication security standards in recent years. For instance, the IEEE 1609.2.1 standard designs a Security Credential Management System (SCMS) that specifies certificate application and issuance processes, as well as certificate revocation processes. Furthermore, the IEEE 1609.2 standard defines certificate formats and Secure Protocol Data Units (SPDUs) for secure data transmission based on these standards. As a result, end entity manufacturers and SCMS providers worldwide have started building V2X security systems in accordance with these standards and conducting interoperability testing. Although international standards mainly employ Elliptic-Curve Cryptography (ECC) for signature/verification and encryption/decryption functions, performance analysis remains a crucial issue for the practical deployment of these systems. Therefore, this study implements end entities and a SCMS conforming to IEEE 1609.2 and IEEE 1609.2.1 standards. It measures the computation and transmission times for each security communication action within the system from the perspective of end entities and identifies potential system bottlenecks. In the experimental results, this study analyzes the most performance-intensive actions and provides relevant suggestions for enhancing system efficiency for SCMS developers to reference.
description: in Chinese language
Bimodal substrate biasing to control γ-Al2O3 deposition during reactive magnetron sputtering
Creators: name: Prenzel, Marina
name: Kortmann, Annika
name: Stein, Adrian
name: von Keudell, Achim
name: Nahif, Farwah
name: Schneider, Jochen M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Al2O3 thin films have been deposited at substrate temperatures between 500°C to 600°C by reactive magnetron sputtering using an additional arbitrary substrate bias to tailor the energy distribution of the incident ions. The films were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The film structure being amorphous, nanocrystalline, or crystalline was correlated with characteristic ion energy distributions. The evolving crystalline structure is connected with different levels of displacements per atom (dpa) in the growing film as being derived from TRIM simulations. The boundary between the formation of crystalline films and amorphous or nanocrystalline films was at 0.9 dpa for a substrate temperature of 500°C. This threshold shifts to 0.6 dpa for films grown at 550°C.
Glyptacus glaucae Kuang 1987
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Acari
Eriophyidae
Glyptacus
Glyptacus glaucae

description: Glyptacus glaucae Kuang, 1987
 Glyptacus glaucae Kuang, 1987: 37.
 Glyptacus glaucae; Amrine & Stasny, 1994: 218.
 Glyptacus glaucae; Kuang, 1995: 40–41.
 Host. Quercus glauca (Fagaceae).
 Relation to host. Vagrant.
 Distribution. China (Fujian).
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 18, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
In the heart of representable metric jets
Creators: name: Burroni, Elisabeth
Publisher: name: arXiv
Year: 2013
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 58C25, 58A20, 54E35, 18D20

description: Here, I aim to immerse myself in the heart of the metric jets, more precisely of those which are representable, restricting myself to the main basic concepts, while going deeper into some notions already mentionned in our previous papers; this will give me the opportunity of lightening the previous texts (including some proofs), while precising some ideas and giving new examples (as the bifractal wave function) with a proof at the end of this paper. Concerning the concrete examples found all along this paper: they play the "starring role" in the understanding of our metric Differential Calculus!
description: 18 pages, 10 figures
Search for Eccentric Binary Black Hole Mergers with Advanced LIGO and Advanced Virgo during Their First and Second Observing Runs
Creators: name: Abbott, B.P.
name: Abbott, R.
name: Abbott, T.D.
name: Abraham, S.
name: Acernese, F.
name: Ackley, K.
name: Affeldt, Christoph
name: Aufmuth, Peter
name: Bergmann, G.
name: Bisht, A.
name: Booker, P.
name: Brinkmann, M.
name: Cabero, M.
name: Danilishin, S.L.
name: Danzmann, K.
name: De Varona, O.
name: Hanke, M.M.
name: Hennig, J.
name: Heurs, M.
name: Hochheim, S.
name: Junker, J.
name: Kaufer, S.
name: Khan, S.
name: Kirchhoff, R.
name: Koehlenbeck, S.M.
name: Koper, N.
name: Krämer, C.
name: Kringel, V.
name: Kuehn, G.
name: Leavey, S.
name: Lehmann, J.
name: Lough, J.D.
name: Lück, H.
name: Mehmet, M.
name: Meylahn, F.
name: Mukherjee, A.
name: Mukund, N.
name: Nery, M.
name: Oppermann, P.
name: Phelps, M.
name: Rüdiger, A.
name: Schreiber, E.
name: Schulte, B.W.
name: Setyawati, Y.
name: Standke, M.
name: Steinke, M.
name: Steinmeyer, D.
name: Vahlbruch, H.
name: Wei, L.-W.
name: Weinert, M.
name: Wellmann, F.
name: Weßels, P.
name: Wilken, D.M.
name: Willke, B.
name: Winkler, W.
name: Wittel, H.
name: Woehler, J.
name: Wu, D.S.
name: Et Al.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2019
Subjects: subject: Binary Black Hole
subject: LIGO
subject: Dewey Decimal Classification::500 | Naturwissenschaften::520 | Astronomie, Kartographie

description: When formed through dynamical interactions, stellar-mass binary black holes (BBHs) may retain eccentric orbits (e > 0.1 at 10 Hz) detectable by ground-based gravitational-wave detectors. Eccentricity can therefore be used to differentiate dynamically formed binaries from isolated BBH mergers. Current template-based gravitational-wave searches do not use waveform models associated with eccentric orbits, rendering the search less efficient for eccentric binary systems. Here we present the results of a search for BBH mergers that inspiral in eccentric orbits using data from the first and second observing runs (O1 and O2) of Advanced LIGO and Advanced Virgo. We carried out the search with the coherent WaveBurst algorithm, which uses minimal assumptions on the signal morphology and does not rely on binary waveform templates. We show that it is sensitive to binary mergers with a detection range that is weakly dependent on eccentricity for all bound systems. Our search did not identify any new binary merger candidates. We interpret these results in light of eccentric binary formation models. We rule out formation channels with rates ⪆100 Gpc-3 yr-1 for e > 0.1, assuming a black hole mass spectrum with a power-law index ≲2.
Conceptualisation, Content and Boundaries: Defining World Heritage Landscapes in Wales
Creators: name: Wakelin, Peter
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2017

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 62 (2016): ICOMOS – Hefte des Deutschen Nationalkomitees
title: Rural landscapes and urban development in Latin America - Identification, conservation and management
Creators: name: Castriota, Leonardo B.
name: Aguilar, Mario Ferrada
name: Adams, Betina
name: Olender, Marcos
name: Gutierrez, Zaxanda Salcedo
name: Calderón-Puente, Cecilia
name: Carsalade, Flavio Lemos
name: Motta, Graciele
name: Santibañez, Gabriela
name: Moretti, Graciela
name: Rincón, Pilar
name: Martinez, Sara E. Narvaez
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: Within the perspective opened in the last decades by the expansion of the concept of heritage, some new ideas have been playing a decisive and innovative role. One of them will be that of "cultural landscape", which, adopted by UNESCO since the early 1990s, inextricably combines the material and immaterial aspects of the concept, often thought separately, indicating the significant interactions between man and the natural environment. Thus, this concept seems to offer a rich perspective when applied also to the traditional ideas in the field of conservation, and may serve, for example, to broaden the perspective over the historical centers themselves, allowing interpretations that focus precisely on the interactions between the natural and cultural aspects, the tangible and intangible dimensions of these ensembles, often ignored. From this expanded understanding, it seems possible to propose integrated strategies of intervention that, by combining these different aspects, end up being much more complete answers to the complex challenges of urban conservation.
Orthogonal Dirac semimetal on honeycomb lattice and the electron spectral function in orthogonal metallic states
Creators: name: Zhong, Yin
name: Luo, Hong-Gang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recently, a concept of orthogonal metal has been introduced to reinterpret the disordered state of slave-spin representation in the Hubbard model as an exotic gapped metallic state. We have extended this concept to study the slave-spin representation of Hubbard model on the honeycomb lattice.[Phys. Rev. B \textbf{86}, 165134 (2012)] It is found that a novel gapped metallic state coined orthogonal Dirac semimetal is identified. Such state corresponds to the disordered phase of slave-spin and has the same thermal-dynamical and transport properties as Dirac semimetal but its singe-particle excitation is gapped. More importantly, for generical orthogonal metallic states, the electron spectral function which may be probed in future angle-resolved photoemission spectroscopy (ARPES) experiments are studied.
description: Part of this article will be published in Int. J. Mod. Phys. B. The discussion on electron spectral function in orthogonal metallic states are totally new. arXiv admin note: substantial text overlap with arXiv:1205.6064
Bubble Economics
Creators: name: Hirano, Tomohiro
name: Toda, Alexis Akira
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: This article provides a self-contained overview of the theory of rational asset price bubbles. We cover topics from basic definitions, properties, and classical results to frontier research, with an emphasis on bubbles attached to real assets such as stocks, housing, and land. The main message is that bubbles attached to real assets are fundamentally nonstationary phenomena related to unbalanced growth. We present a bare-bones model and draw three new insights: (i) the emergence of asset price bubbles is a necessity, instead of a possibility; (ii) asset pricing implications are markedly different between balanced growth of stationary nature and unbalanced growth of nonstationary nature; and (iii) asset price bubbles occur within larger historical trends involving shifts in industrial structure driven by technological innovation, including the transition from the Malthusian economy to the modern economy.
Industrielle Kulturlandschaften im Welterbe-Kontext
Creators: name: Ringbeck, Birgitta
Publisher: name: ICOMOS – Hefte des Deutschen Nationalkomitees
Year: 2017

description: ICOMOS – Hefte des Deutschen Nationalkomitees, Bd. 62 (2016): ICOMOS – Hefte des Deutschen Nationalkomitees
Glyptacus lithocarpi Keifer 1953
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Acari
Eriophyidae
Glyptacus
Glyptacus lithocarpi

description: Glyptacus lithocarpi Keifer, 1953
 Glyptacus lithocarpi; Amrine & Stasny, 1994: 218.
 Glyptacus lithocarpi; Baker, et al., 1996: 188.
 Host. Lithocarpus densiflora, L. densiflorus (Fagaceae).
 Relation to host. Vagrant.
 Distribution. USA.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on pages 18-19, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Search for gravitational waves from binary black hole inspiral, merger, and ringdown in LIGO-Virgo data from 2009-2010
Creators: name: Aasi, J.
name: Allen, Bruce
name: Ast, Stefan
name: Aufmuth, Peter
name: Danzmann, Karsten
name: Kaufer, S.
name: Lück, Harald
name: Meier, Tobias
name: Raja, S.
name: Schnabel, R.
name: Vahlbruch, H.
name: Willke, Benno
name: Et Al.
name: LIGO Scientific Collaboration
name: Collaboration, Virgo
Publisher: name: College Park, MD : American Physical Society
Year: 2013
Subjects: subject: Gravitational waves
subject: Binary Black Holes
subject: Gravitationswelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report a search for gravitational waves from the inspiral, merger and ringdown of binary black holes (BBH) with total mass between 25 and 100 solar masses, in data taken at the LIGO and Virgo observatories between July 7, 2009 and October 20, 2010. The maximum sensitive distance of the detectors over this period for a (20,20)M⊙ coalescence was 300 Mpc. No gravitational wave signals were found. We thus report upper limits on the astrophysical coalescence rates of BBH as a function of the component masses for nonspinning components, and also evaluate the dependence of the search sensitivity on component spins aligned with the orbital angular momentum. We find an upper limit at 90% confidence on the coalescence rate of BBH with nonspinning components of mass between 19 and 28M⊙ of 3.3×10−7 mergers Mpc−3 yr−1. © 2013 The American Physical Society
Bigraphical Arrangements
Creators: name: Hopkins, Sam
name: Perkinson, David
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C35, 05C25

description: We define the bigraphical arrangement of a graph and show that the Pak-Stanley labels of its regions are the parking functions of a closely related graph, thus proving conjectures of Duval, Klivans, and Martin and of Hopkins and Perkinson. A consequence is a new proof of a bijection between labeled graphs and regions of the Shi arrangement first given by Stanley. We also give bounds on the number of regions of a bigraphical arrangement.
description: Added Remark 19 addressing arbitrary G-parking functions; minor revisions
Über die elektronische Wechselwirkung bei der Adsorption und Okklusion von Wasserstoff und Deuterium durch dünne im Ultrahochvakuum aufgedampfte Palladiumfilme
Creators: name: Suhrmann, R.
name: Schumicki, G.
name: Wedler, G.
Publisher: name: Berlin : De Gruyter
Year: 1964
Subjects: subject: Wasserstoff
subject: Deuterium
subject: Ultrahochvakuum
subject: aufgedampfte Palladiumfilme
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Im Ultrahochvakuum aufgedampfte dünne Palladiumfilme werden bei 295°, 195°. 90° und 77 °K mit gemessenen Mengen n Wasserstoff oder Deuterium beladen und die hierdurch bewirkte Änderung des elektrischen Widerstandes R sowie der photoelektrischen Empfindlichkeit I/I0 der Filmoberfläche verfolgt.Bei allen Temperaturen nimmt I/I0 zu Anfang sehr stark ab. d. h. es bildet sich zuerst eine nach außen negative Adsorptionsschicht. R wird gleichzeitig erhöht. Noch vor der Ausbildung einer mono- a'omaren Adsorptionsschicht gewinnt ein zweiter Prozeß, der den Widerstand absinken läßt, das Übergewicht. Da I/I0 hierdurch nicht mehr beeinflußt wird. dringt das Gas bei dem zweiten Prozeß in den Film ein. Es kann bei 295 °K durch Abpumpen unter Widerstandszunahme zum Teil wieder desorbiert werden. Bei 195 °K, 90 °K und 77 °K werden unter den angewandten Drucken (p < 10-1 Torr), nachdem die Oberfläche besetzt ist, in einem dritten Prozeß wesentlich größere Gasmengen vom Palladium im Volumen aufgenommen. Dabei wächst R linear mit der aufgenommenen Gasmenge bis um 90% des Anfangswiderstandes. I/I0 fällt nur sehr wenig ab. Bei Deuteriumaufnahme ist die Widerstandszunahme größer als bei Aufnahme von Wasserstoff. Bei 195°K zerfällt die entstandene β-Phase, wenn der Gasdruck unter 10-4 Torr erniedrigt wird; die negative Adsorptionsschicht wird nicht desorbiert. Bei 90°K und 77°K ist die β-Phase auch bei Drucken unterhalb 10-7 Torr beständig. Die Widerstandszunahme ist bei dem Atomverhältnis H/Pd bzw. D/Pd =1 beendet, die β-Phase also voll ausgebildet. Anschließend wird bis zu D/Pd bzw. H/Pd ≈ 1,8 weiteres Gas aufgenommen. das den Widerstand jedoch nur wenig absinken läßt und beim Abpumpen wieder abgegeben wird. Es ist anzunehmen, daß beim Aufbau der β-Phase bis H/Pd bzw. D/Pd =1 die D- bzw. Η-Atome in die Oktaederlücken des Palladiumgitters eingebaut werden. Da beim Atomverhältnis 0,6 in dem linearen Anstieg von R/R0 vs Atomverhältnis keinerlei Besonderheit auftritt, ist nicht das Auffüllen der 4d-Lücken des Palladiumgitters, sondern die Störung des Leitungsmechanismus durch die eingebauten Fremdatome die Ursache der Widerstandszunahme bei der Aufnahme des Wasserstoffs bzw. Deuteriums bis zum Atomverhältnis eins. Die Bildung der β-Phase erfolgt von einzelnen Keimen aus, die bei weiterer Gasaufnahme wachsen. Nach dem Aufbau der β-Phase kann der Film zusätzlich Wasserstoff bzw. Deuterium aufnehmen; das zusätzlich aufgenommene Gas verursacht nur eine geringe Widerstands-Abnahme und kann wieder abgepumpt werden.
Hermitian versus non-Hermitian representations for minimal length uncertainty relations
Creators: name: Dey, Sanjib
name: Fring, Andreas
name: Khantoul, Boubakeur
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate four different types of representations of deformed canonical variables leading to generalized versions of Heisenberg's uncertainty relations resulting from noncommutative spacetime structures. We demonstrate explicitly how the representations are related to each other and study three characteristically different solvable models on these spaces, the harmonic oscillator, the manifestly non-Hermitian Swanson model and an intrinsically noncommutative model with Poeschl-Teller type potential. We provide an analytical expression for the metric in terms of quantities specific to the generic solution procedure and show that when it is appropriately implemented expectation values are independent of the particular representation. A recently proposed inequivalent representation resulting from Jordan twists is shown to lead to unphysical models. We suggest an anti-PT-symmetric modification to overcome this shortcoming.
description: 14 pages, 1 figure
Über die IR-Spektren ungesättigter N-heterocyclischer Verbindungen: I. Mitt.: Chinoxalin und Derivate
Creators: name: Perkampus, H.-H.
name: Roders, A.
Publisher: name: Berlin : De Gruyter
Year: 1960
Subjects: subject: Chinoxalin
subject: C-H-Deformations-Schwingungen
subject: Benzol
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Auf Chinoxalin und 17 Derivate dieser Verbindung werden die Regelmäßigkeiten, die im Bereich der nicht-ebenen C-H-Deformations-Schwingungen in Abhängigkeit von der Zahl der Substituenten am Benzolkern aufgestellt worden sind, angewandt. Es zeigt sich, daß auch diese Verbindungsklasse diesem Schema eingefügt werden kann.
Der Aachener Goldschmied Hans von Reutlingen (um 1465 bis um 1547). Versuch einer Dokumentation seines Werkes
Creators: name: Grimme, Ernst Günther
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 49 (1980-1981): Aachener Kunstblätter
The Outer Halo of the Nearest Giant Elliptical: A VLT/VIMOS Survey of the Resolved Stellar Populations in Centaurus A to 85 kpc
Creators: name: Crnojević, D.
name: Ferguson, A. M. N.
name: Irwin, M. J.
name: Bernard, E. J.
name: Arimoto, N.
name: Jablonka, P.
name: Kobayashi, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the first deep survey of resolved stellar populations in the remote outer halo of our nearest giant elliptical (gE), Centaurus A (D=3.8 Mpc). Using the VIMOS/VLT optical camera, we obtained deep photometry for four fields along the major and minor axes at projected elliptical radii of ~30-85 kpc (corresponding to ~5-14 R_{eff}). We use resolved star counts to map the spatial and colour distribution of red giant branch (RGB) stars down to ~2 magnitudes below the RGB tip. We detect an extended halo out to the furthermost elliptical radius probed (~85 kpc or ~14 R_{eff}), demonstrating the vast extent of this system. We detect a localised substructure in these parts, visible in both (old) RGB and (intermediate-age) luminous asymptotic giant branch stars, and there is some evidence that the outer halo becomes more elliptical and has a shallower surface brightness profile. We derive photometric metallicity distribution functions for halo RGB stars and find relatively high median metallicity values ([Fe/H]_{med} -0.9 to -1.0 dex) that change very little with radius over the extent of our survey. Radial metallicity gradients are measured to be ~-0.002 to -0.004 dex/kpc and the fraction of metal-poor stars (defined as [Fe/H]
description: 17 pages, 12 figures; MNRAS accepted
The quantum technologies roadmap: A European community view
Creators: name: Acín, Antonio
name: Bloch, Immanuel
name: Buhrman, Harry
name: Calarco, Tommaso
name: Eichler, Christopher
name: Eisert, Jens
name: Esteve, Daniel
name: Gisin, Nicolas
name: Glaser, Steffen J.
name: Jelezko, Fedor
name: Kuhr, Stefan
name: Lewenstein, Maciej
name: Riedel, Max F.
name: Schmidt, Piet O.
name: Thew, Rob
name: Wallraff, Andreas
name: Walmsley, Ian
name: Wilhelm, Frank K.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2018
Subjects: subject: Quantum communication
subject: Quantum computing
subject: Quantum control
subject: Quantum sensing
subject: Quantum simulation
subject: Quantum technologies
subject: Quantum theory
subject: Computation theory
subject: Quantum chemistry
subject: Quantum computers
subject: Quantum cryptography
subject: Quantum electronics
subject: Quantum entanglement
subject: Quantum optics
subject: Quantum Computing
subject: Quantum simulations
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Within the last two decades, quantum technologies (QT) have made tremendous progress, moving from Nobel Prize award-winning experiments on quantum physics (1997: Chu, Cohen-Tanoudji, Phillips; 2001: Cornell, Ketterle, Wieman; 2005: Hall, Hänsch-, Glauber; 2012: Haroche, Wineland) into a cross-disciplinary field of applied research. Technologies are being developed now that explicitly address individual quantum states and make use of the 'strange' quantum properties, such as superposition and entanglement. The field comprises four domains: quantum communication, where individual or entangled photons are used to transmit data in a provably secure way; quantum simulation, where well-controlled quantum systems are used to reproduce the behaviour of other, less accessible quantum systems; quantum computation, which employs quantum effects to dramatically speed up certain calculations, such as number factoring; and quantum sensing and metrology, where the high sensitivity of coherent quantum systems to external perturbations is exploited to enhance the performance of measurements of physical quantities. In Europe, the QT community has profited from several EC funded coordination projects, which, among other things, have coordinated the creation of a 150-page QT Roadmap (http://qurope.eu/h2020/qtflagship/roadmap2016). This article presents an updated summary of this roadmap.
Johnella chrysolepis Keifer 1959
Creators: name: XUE, XIAO-FENG
name: WANG, ZHEN
name: SONG, ZI-WEI
name: HONG, XIAO-YUE
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Actinedida
Eriophyidae
Johnella
Johnella chrysolepis

description: Johnella chrysolepis Keifer, 1959
 Johnella chrysolepis Keifer, 1959a: 652.
 Johnella chrysolepis; Amrine & Stasny, 1994: 221.
 Johnella chrysolepis; Baker, et al., 1996: 258.
 Host. Quercus chrysolepis (Fagaceae).
 Relation to host. Vagrant.
 Distribution. USA.
description: Published as part of XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), pp. 1-95 in Zootaxa 2253 (1) on page 19, DOI: 10.11646/zootaxa.2253.1.1, http://zenodo.org/record/5496215
Dark Energy Constraints from Pantheon+ Ia Supernovae Data
Creators: name: Torres-Arzayus, Sergio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Measurements of the current expansion rate of the Universe, $H_0$, using standard candles, disagree with those derived from observations of the Cosmic Microwave Background (CMB). This discrepancy, known as the Hubble tension, is substantial and suggests the possibility of revisions to the standard cosmological model (Cosmological constant $Λ$ and cold dark matter - $Λ$CDM). Dynamic dark energy (DE) models that introduce deviations in the expansion history relative to $Λ$CDM could potentially explain this tension. We used Type Ia supernovae (SNe) data to test a dynamic DE model consisting of an equation of state that varies linearly with the cosmological scale factor $a$. To evaluate this model, we developed a new statistic (the $T_α$ statistic) used in conjunction with an optimization code that minimizes its value to obtain model parameters. The $T_α$ statistic reduces bias errors (in comparison to the $χ^2$ statistic) because it retains the sign of the residuals, which is meaningful in testing the dynamic DE model as the deviations in the expansion history introduced by this model act asymmetrically in redshift space. The DE model fits the SNe data reasonably well, but the available SNe data lacks the statistical power to discriminate between $Λ$CDM and alternative models. To further assess the model using CMB data, we computed the distance to the last scattering surface and compared the results with that derived from the Planck observations. Although the simple dynamic DE model tested does not completely resolve the tension, it is not ruled out by the data and could still play a role alongside other physical effects.
description: 21 pages, 9 figures
Waveguide for Bose-Einstein condensates
Creators: name: Bongs, Kai
name: Burger, S.
name: Dettmer, S.
name: Hellweg, D.
name: Arlt, Jan J.
name: Ertmer, Wolfgang
name: Sengstock, K.
Publisher: name: American Physical Society
Year: 2001
Subjects: subject: Bose-Einstein condensates
subject: trap
subject: BEC
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report on the creation of Bose-Einstein condensates of 87Rb in a specially designed hybrid, optical dipole and magnetic trap. This trap naturally allows the coherent transfer of matter waves into a pure optical dipole potential waveguide based on a doughnut beam. Specifically, we present studies of the coherence of the ensemble in the hybrid trap and during the evolution in the waveguide by means of an autocorrelation interferometer scheme. We observe a mean-field dominated acceleration in the waveguide on a much longer time scale than in the free three-dimensional expansion. ©2001 The American Physical Society.
Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)
Creators: name: Moriya, Kei
name: Schumacher, Reinhard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The reaction gamma + p -> K+ + Sigma + pi was used to determine the invariant mass distributions or "line shapes" of the Sigma+ pi-, Sigma- pi+ and Sigma0 pi0 final states, from threshold at 1328 MeV/c^2 through the mass range of the Lambda(1405) and the Lambda(1520). The measurements were made with the CLAS system at Jefferson Lab using tagged real photons, for center-of-mass energies 1.95 < W < 2.85 GeV. The three mass distributions differ strongly in the vicinity of the I=0 Λ(1405), indicating the presence of substantial I=1 strength in the reaction. Background contributions to the data from the Sigma0(1385) and from K^* Sigma production were studied and shown to have negligible influence. To separate the isospin amplitudes, Breit-Wigner model fits were made that included channel-coupling distortions due to the NKbar threshold. A best fit to all the data was obtained after including a phenomenological I=1, J^P = 1/2^- amplitude with a centroid at 1394\pm20 MeV/c^2 and a second I=1 amplitude at 1413\pm10 MeV/c^2. The centroid of the I=0 Lambda(1405) strength was found at the Sigma pi threshold, with the observed shape determined largely by channel-coupling, leading to an apparent overall peak near 1405 MeV/c^2.
description: Figure got replaced during submission, fixed
Spatial contributions of electron trajectories to high-order-harmonic radiation originating from a semi-infinite gas cell
Creators: name: Kretschmar, Martin
name: Hernández-García, Carlos
name: Steingrube, Daniel S.
name: Plaja, Luis
name: Morgner, Uwe
name: Kovačev, Milutin
Publisher: name: American Physical Society
Year: 2013
Subjects: subject: Angular divergence
subject: Electron trajectories
subject: Generation process
subject: Harmonic radiation
subject: High order harmonics
subject: Phase coefficients
subject: Spatial beam profiles
subject: Spatial regions
subject: Cutoff frequency
subject: Gases
subject: Phase matching
subject: Harmonic analysis
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report on the analysis of the spatial beam profile of high-order harmonic radiation originating from a semi-infinite gas cell (SIGC). We experimentally assign contributions of electron trajectories to different spatial regions of the harmonic radiation beam. The angular divergence of the harmonic radiation is studied for the first time in a SIGC as a function of different phase-matching parameters. We relate the ratio of the dipole phase coefficients to the coherence time and divergence angle measurements. Simulations, including high-order-harmonic propagation, give further insight into the generation process and the influence of phase matching. The analysis reveals that the SIGC enables tuning of the cutoff frequency by altering the absorption of the generating medium. © 2013 American Physical Society.