cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Time-Dependent Models of Accretion Disks Formed from Compact Object Mergers
Creators: name: Metzger, B. D.
name: Piro, A. L.
name: Quataert, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present time-dependent models of the accretion disks created during compact object mergers, focusing on the energy available from accretion at late times and the composition of the disk and its outflows. We calculate the dynamics near the outer edge of the disk, which contains the majority of the mass and sets the accretion rate onto the central black hole. This allows us to follow the evolution over much longer timescales than current hydrodynamic simulations. At late times the disk becomes advective and its properties asymptote to self-similar solutions with accretion rate dM/dt ~ t^(-4/3) (neglecting outflows). This late-time accretion can in principle provide sufficient energy to power the late-time activity observed from some short-duration gamma-ray bursts (GRBs). However, because outflows during the advective phase unbind the majority of the remaining mass, it is difficult for the remnant disk alone to produce significant accretion power well beyond the onset of the advective phase. Unless the viscosity is quite low (alpha ~1e-3), this occurs before the start of observed flaring at ~ 30 s; continued mass inflow thus appears required to explain the late-time activity from short GRBs. We show that the composition of the disk freezes-out relatively neutron-rich (electron fraction Ye ~ 0.3). Roughly 1e-2 Msun of this neutron-rich material is ejected by winds at late times. During earlier, neutrino-cooled phases of accretion, neutrino irradiation of the disk produces a wind with Ye ~ 0.5, which synthesizes at most ~ 1e-3 Msun of Ni56. We highlight what conditions are favorable for Ni56 production and predict, in the best cases, optical and infrared transients peaking ~ 0.5-2 days after the burst, with fluxes a factor of ~ 10 below the current observational limits.
description: 19 pages, 15 figures; minor changes to figures and text; temperature figure added; Accepted to MNRAS
Capillipedium huegelii A. Camus 1921
Creators: name: Tiwari, Arjun Prasad
name: Chorghe, Alok
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Capillipedium
Capillipedium huegelii

description: 2. Capillipedium huegelii (Hackel 1889: 492) A. Camus (1921: 306). (Fig. 2)
Basionym:— Andropogon huegelii Hackel (1889: 492).
Lectotype (designated here):— INDIA. Rajasthan: Sirohi district, Mount Abu, J. F. Duthie 6764 [W19160028261 (digital image!)].
Distribution:— INDIA: Andhra Pradesh, Gujarat, Madhya Pradesh, Karnataka, Maharashtra, Rajasthan, Tamil Nadu and Uttarakhand (endemic to the country; Singh et al. 2015).
Notes:— Hackel (1889) described Andropogon huegelii based on two gatherings from India [Asia (Hügel n. 2243 in h. Vind., verisimiliter, ut ex num. cit. patet, in India ad pades Himalayae lectus); Radschputana in m. Abu (Duthie in h. m.)], but no specific herbarium sheet was designated as the holotype. According to Stafleu & Cowan (1976), Hackel’s type specimens are mainly housed at W, which was the herbarium where he deposited his collections, with duplicates sent to several herbaria. Attempts were made to locate the type specimens at W, as well as other herbaria (BM, GB & K). The two sheets of A. huegelii housed at W [J.F. Duthie 6764 (W19160028261!); C.A.A. Hügel 2243 (W0027493!)] correspond to the original material cited by Hackel (1889). These two specimens are syntypes, because a single specimen was not designated by Hackel (1889) as the type. We chose the sheet W19160028261 as the lectotype because it the best and having complete specimen with original annotation by Hackel. It is agrees well with the protologue.
description: Published as part of Tiwari, Arjun Prasad & Chorghe, Alok, 2020, Lectotypification Of Three Names In The Genus Capillipedium (Andropogoneae: Poaceae), pp. 186-190 in Phytotaxa 429 (2) on page 187, DOI: 10.11646/phytotaxa.429.2.10, http://zenodo.org/record/13876749
Electronic transport and specific heat of 1T- VSe2
Creators: name: Yadav, C. S.
name: Rastogi, A. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The results of low temperature thermoelectric power and the specific heat of 1T-VSe2 (Vanadium diselenide) have been reported along with the electrical resistivity, and Hall coefficient of the compound. The Charge Density Wave (CDW) transition is observed near 110K temperature in all these properties. The Thermoelectric power has been measured from 15K to 300K spanning the incommensurate and commensurate CDW regions. We observed a weak anomaly at the CDW transition for the first time in the specific heat of VSe2. The linear temperature dependence of resistivity and thermoelectric power at higher temperatures suggests a normal metallic behavior and electron-phonon scattering above the CDW transition. The positive thermoelectric power and negative Hall coefficient along with strongly temperature dependent behavior in the CDW phase suggest a mixed conduction related to the strongly hybridized s-p-d bands in this compound.
description: 17 pages, 4 figures. to appear in Solid State Communication
Capillipedium pteropechys Stapf 1922
Creators: name: Tiwari, Arjun Prasad
name: Chorghe, Alok
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Capillipedium
Capillipedium pteropechys

description: 3. Capillipedium pteropechys (Clarke) Stapf (1922: sub t. 3085). (Fig. 3)
Basionym:— Andropogon pteropechys Clarke (1889: 88).
Lectotype (designated here):— INDIA. Nagaland: Naga Hills, Kegwima edge, 10 November 1885, C. B. Clarke 61896 C [K001057406 (digital image!)]. Isolectotype: K001057408 (digital image!).
Distribution:— INDIA: Assam and Nagaland (endemic to the country; Singh et al. 2015).
Notes:—When Clarke (1889) described Andropogon pteropechys, he cited two gatherings [Kohima, alt. 5500 feet (n. 41187); Jakpho, alt. 7500 feet (n. 41896)] as part of the original material consulted. According to Stafleu & Cowan (1976), Clarke’s collections are mainly housed at K and CAL, with duplicates in several herbaria. We found three sheets of specimens collected by Clarke at K [Nagaland, Kegwima Edge, Naga Hills, 10 November 1885, C.B. Clarke 61896C (K001057406!), 61896E (K001057408!); Kegwima, Naga Hills, 26 October 1885, C.B. Clarke 41187A (K001057407!)] which bears all details in Clarke’s own handwriting. Besides, we also found one of Clarke’s collections in W (W19160028300!), annotated only as “ Andropogon pteropechys ” in Clarke’s handwriting, without further details on the label. It is possible that he had used this specimen (W barcode W19160028300) as type when he published his work. The specimen 61896C (K001057406) is designated here as the lectotype because it bears details of date, locality, and number in C.B. Clarke’s own handwriting, an annotation as “sp nova”, and also illustrations of the floral parts made by Clarke that correspond to the original description (Fig. 3).
description: Published as part of Tiwari, Arjun Prasad & Chorghe, Alok, 2020, Lectotypification Of Three Names In The Genus Capillipedium (Andropogoneae: Poaceae), pp. 186-190 in Phytotaxa 429 (2) on page 189, DOI: 10.11646/phytotaxa.429.2.10, http://zenodo.org/record/13876749
Neolygus rufifemoratus Yasunaga 2024, n. sp.
Creators: name: Yasunaga, Tomohide
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Miridae
Neolygus
Neolygus rufifemoratus

description: Neolygus rufifemoratus n. sp.
Figs. 5J–L, 12A–C, 20G–O
Material examined. Holotype (♂). TAIWAN: Taichung City, Huping, Wuling-Chika, Mt. Hsueshan (1900–2400 m alt.), 24.36, 121.31, 13 Aug 1990, M. Tomokuni (NSMT) (AMNH _ PBI 00378773). Paratypes: TAIWAN: Taichung City, Huping, Yunlong, Shanchuang, 2500 m alt., UV lighting, 4 Aug 1990, M. Tomokuni, 1♂ (NSMT); Huping, Szuyuan–Yushong, 1900–2300 m alt., 1 Aug 1990, M. Tomokuni, 1♀ (NSMT).
Diagnosis. Recognized by its generally pale green, moderate-sized, elongate, subparallel-sided body (Fig. 5J– K); darkened apex of clypeus (Fig. 5L); narrow brown macula at apex of corium; reddish brown apical 1/2–1/3 of metafemur; projected phallotheca with a subapical fold (Fig. 20O); and narrow, spatulate vesical ventral sclerite with a small, hooked process at apex (Fig. 20O). A combination of these characters enables this new species to be distinguished from other Asian congeners.
Description. Body elongate-oval, subparallel-sided, moderate in size; basic coloration pale green; dorsal surface with uniformly distributed, pale, simple, short, reclining-semierect setae. Head pale brown, weakly tinged with red, shining; basal transverse carina of vertex slightly narrower than pronotal collar. Antenna pale brown; apex of segment II, entire III and IV brown. Labium pale reddish brown, slightly exceeding apex of mesocoxa, shorter than metafemur; apex of segment IV darkened. Pronotum and scutellum shining, partly tinged with red; thoracic pleura pale reddish brown; scent efferent system pale brown, subtriangular with small peritreme (Fig. 20H). Hemelytra shiny pale green; clavus more or less tinged with brown; apex of corium with a brown, narrow macula; membrane smoky brown, speckled with semitransparent, pale portions. All coxae creamy pale brown; legs pale brown; basal 1/2–1/3 of metafemur reddish brown (Fig. 5L); apex of each tarsomere III darkened; meta-tarsomere II slightly longer than III (Fig. 20I); pretarsal structure as in Fig. 20J; parempodia relatively short. Ventral side of abdomen yellowish green.
Male genitalia (Figs. 12A–C, 20K–O): Sensory lobes of parameres moderately produced at apex (Figs. 12A– B, 20L–N); right paramere with hooked hypophysis (Fig. 12B, 20N); vesica with weakly curved spiculum and spatulate, narrow ventral sclerite (Figs. 12C, 20O).
Female genitalia: Not examined.
Measurements: See Table 1.
Etymology. From Latin, rufi- (rufus, red) combined with femoratus (= femur), referring to the reddish femora of this new species; an adjective.
Distribution. Taiwan (Taichung).
Biology. Unknown.
description: Published as part of Yasunaga, Tomohide, 2024, New species of the plant bug genus Neolygus Knight from Japan, Taiwan and Thailand (Hemiptera: Heteroptera: Miridae: Mirini), pp. 451-487 in Zootaxa 5446 (4) on pages 473-475, DOI: 10.11646/zootaxa.5446.4.1, http://zenodo.org/record/11102124
Towards an Automatic Proof of Lamport's Paxos
Creators: name: Goel, Aman
name: Sakallah, Karem A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: Lamport's celebrated Paxos consensus protocol is generally viewed as a complex hard-to-understand algorithm. Notwithstanding its complexity, in this paper, we take a step towards automatically proving the safety of Paxos by taking advantage of three structural features in its specification: spatial regularity in its unordered domains, temporal regularity in its totally-ordered domain, and its hierarchical composition. By carefully integrating these structural features in IC3PO, a novel model checking algorithm, we were able to infer an inductive invariant that identically matches the human-written one previously derived with significant manual effort using interactive theorem proving. While various attempts have been made to verify different versions of Paxos, to the best of our knowledge, this is the first demonstration of an automatically-inferred inductive invariant for Lamport's original Paxos specification. We note that these structural features are not specific to Paxos and that IC3PO can serve as an automatic general-purpose protocol verification tool.
description: "to be published in Formal Methods in Computer-Aided Design (FMCAD) 2021, see https://fmcad.org/FMCAD21"
The forgotten monoid
Creators: name: Novelli, Jean-Christophe
name: Schilling, Anne
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We study properties of the forgotten monoid which appeared in work of Lascoux and Schutzenberger and recently resurfaced in the construction of dual equivalence graphs by Assaf. In particular, we provide an explicit characterization of the forgotten classes in terms of inversion numbers and show that there are n^2-3n+4 forgotten classes in the symmetric group S_n. Each forgotten class contains a canonical element that can be characterized by pattern avoidance. We also show that the sum of Gessel's quasi-symmetric functions over a forgotten class is a 0-1 sum of ribbon-Schur functions.
description: 13 pages; in version 3 the proof of Proposition 3 is corrected
Методологические и прикладные проблемы медицинской (клинической) психологии (Поляковские чтения): о конференции к 90-летию Ю. Ф. Полякова
Creators: name: Сергиенко Алексей Анатольевич
name: Строгова Светлана Евгеньевна
name: Зверева Наталья Владимировна
name: Зверева Мария Вячеславовна
Publisher: name: Медицинская психология в России
Year: 2018
Subjects: медицинская психология; клиническая психология; патопсихология; конференция; Ю.Ф. Поляков.

description: Статья посвящена итогам прошедшей в Москве 15—16 марта 2018 года конференции «Методологические и прикладные проблемы медицинской (клинической) психологии» приуроченной к 90-летию Ю.Ф.Полякова (1927—2002). Конференция организована в содружестве двух организаций: Московского государственного психологопедагогического университета (ФГБОУ ВО МГППУ) и Научного центра психического здоровья (ФГБНУ НЦПЗ). Это вторая масштабная конференция по медицинской (клинической) психологии, посвященная Ю.Ф.Полякову, которая с этого года имеет подзаголовок: «Поляковские чтения». Юрий Федорович Поляков — выдающийся советский психолог, крупный специалист в области патопсихологии, ближайший ученик и соратник Б.В. Зейгарник, организатор науки и образования в области клинической психологии. Один из аспектов проведенной конференции — уточнение роли Ю.Ф. Полякова для развития современной клинической психологии в ее научном, практическом и образовательном аспектах. В статье изложены основные события конференции, дан обзор направлений научных секций, отмечены ключевые доклады, мастер-классы, освещена проведенная постер-сессия молодых ученых в области клинической психологии. Обсуждаются итоги дискуссии, состоявшейся в рамках Круглого стола Поляковских чтений-2018, в контексте современных тенденций образования и практических трендов в клинической психологии.
The Dark Matter Annihilation Signal from Galactic Substructure: Predictions for GLAST
Creators: name: Kuhlen, Michael
name: Diemand, Jürg
name: Madau, Piero
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present quantitative predictions for the detectability of individual Galactic dark matter subhalos in gamma-rays from dark matter pair annihilations in their centers. Our method is based on a hybrid approach, employing the highest resolution numerical simulations available (including the recently completed one billion particle Via Lactea II simulation) as well as analytical models for the extrapolation beyond the simulations' resolution limit. We include a self-consistent treatment of subhalo boost factors, motivated by our numerical results, and a realistic treatment of the expected backgrounds that individual subhalos must outshine. We show that for reasonable values of the dark matter particle physics parameters (M_X ~ 50 - 500 GeV and ~ 10^-26 - 10^-25 cm^3/s) GLAST may very well discover a few, even up to several dozen, such subhalos, at 5 sigma significance, and some at more than 20 sigma. We predict that the majority of luminous sources would be resolved with GLAST's expected angular resolution. For most observer locations the angular distribution of detectable subhalos is consistent with a uniform distribution across the sky. The brightest subhalos tend to be massive (median Vmax of 24 km/s) and therefore likely hosts of dwarf galaxies, but many subhalos with Vmax as low as 5 km/s are also visible. Typically detectable subhalos are 20 - 40 kpc from the observer, and only a small fraction are closer than 10 kpc. The total number of observable subhalos has not yet converged in our simulations, and we estimate that we may be missing up to 3/4 of all detectable subhalos.
description: 19 pages, 12 figures, ApJ accepted, a version with higher resolution figures can be downloaded from http://www.sns.ias.edu/~mqk/transfer/VL2_GLAST_predictions.pdf
Storing vector-vortex states of light in intra-atomic frequency comb
Creators: name: Chanchal
name: Teja, G. P.
name: Simon, Christoph
name: Goyal, Sandeep K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Photons are one of the prominent candidates for long-distance quantum communication and quantum information processing. Certain quantum information processing tasks require storage and faithful retrieval of single photons preserving the internal states of the photons. Here we propose a method to store the vector-vortex states of light in the intra-atomic frequency comb based quantum memory. We show that an atomic ensemble with two intra-atomic frequency combs corresponding to $Δm = \pm1$ transitions of similar frequency are sufficient for a robust and efficient quantum memory for vector-vortex states of light. As an example, we show that the Cs and Rb atoms are good candidates for storing these internal modes of light.
Derivatives of Knots and Second-order Signatures
Creators: name: Cochran, Tim
name: Harvey, Shelly
name: Leidy, Constance
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25; 57M10

description: We define a set of "second-order" L^(2)-signature invariants for any algebraically slice knot. These obstruct a knot's being a slice knot and generalize Casson-Gordon invariants, which we consider to be "first-order signatures". As one application we prove: If K is a genus one slice knot then, on any genus one Seifert surface, there exists a homologically essential simple closed curve of self-linking zero, which has vanishing zero-th order signature and a vanishing first-order signature. This extends theorems of Cooper and Gilmer. We introduce a geometric notion, that of a derivative of a knot with respect to a metabolizer. We also introduce a new equivalence relation, generalizing homology cobordism, called null-bordism.
description: 40 pages, 22 figures, typographical corrections, to appear in Alg. Geom. Topology
Coherent states in the symmetric gauge for graphene under a constant perpendicular magnetic field
Creators: name: Díaz-Bautista, Erik
name: Negro, Javier
name: Nieto, Luis Miguel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we describe semiclassical states in graphene under a constant perpendicular magnetic field by constructing coherent states in the Barut-Girardello sense. Since we want to keep track of the angular momentum, the use of the symmetric gauge and polar coordinates seemed the most logical choice. Different classes of coherent states are obtained by means of the underlying algebra system, which consists of the direct sum of two Heisenberg-Weyl algebras. The most interesting cases are a kind of partial coherent states and the coherent states with a well-defined total angular momentum.
description: 24 pages, 13 figures
Constraining the Two-Higgs-Doublet-Model parameter space
Creators: name: Kaffas, Abdul Wahab El
name: Ogreid, Odd Magne
name: Osland, Per
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We confront the Two-Higgs-Doublet Model with a variety of experimental constraints as well as theoretical consistency conditions. The most constraining data are the \bar B\to X_sγdecay rate (at low values of M_{H^\pm}), and Δρ(at both low and high M_{H^\pm}). We also take into account the B\bar B oscillation rate and R_b, or the width Γ(Z\to b\bar b) (both of which restrict the model at low values of \tanβ), and the B^-\toτν_τdecay rate, which restricts the model at high \tanβand low M_{H^\pm}. Furthermore, the LEP2 non-discovery of a light, neutral Higgs boson is considered, as well as the muon anomalous magnetic moment. Since perturbative unitarity excludes high values of \tanβ, the model turns out to be very constrained. We outline the remaining allowed regions in the \tanβ-M_{H^\pm} plane for different values of the masses of the two lightest neutral Higgs bosons, and describe some of their properties.
description: 17 pages, 17 figures
title: Tiryns, Griechenland. Die Arbeiten der Jahre 2015 bis 2018
Creators: name: Maran, Joseph
name: Papadimitriou, Alkestis
name: Birndorfer, Thomas
name: Khamnueva, Svetlana
name: Bork, Hans-Rudolf
name: Unkel, Ingmar
name: Kroll, Helmut
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: e-Forschungsberichte, Faszikel 1 (2019)
description: This report deals with recent research in the Northwestern Lower Town of Tiryns, built in the early 12th century BC as a new part of the site. It focuses on the cultural and social changes between the late Palatial Period and the older half of the Post-Palatial Period (c. 1220–1130 BC).
title: Olympia, Griechenland. Das Leonidaion. Die Arbeiten der Jahre 2016 bis 2018
Creators: name: Mächler, Claudia
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: e-Forschungsberichte, Faszikel 1 (2019)
description: After already having published a preliminary report on the campaigns in 2014 and 2015, this series shall be continued by a summary of the work performed between 2016 and 2018. During this period the building survey could be finished, over 1000 workpieces were assigned to the Leonidaion, a structure from motion based 3D-model was created and the trial trenches that complemented the mere survey proved to be of great importance, since they shed new light on the dating of the so-called first Roman Imperial refashioning of the Leonidaion.
Hankel hyperdeterminants, rectangular Jack polynomials and even powers of the Vandermonde
Creators: name: Belbachir, Hacene
name: Boussicault, Adrien
name: Luque, Jean-Gabriel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E05, 05E35, 15A15, 15A69, 68R05

description: We investigate the link between rectangular Jack polynomials and Hankel hyperdeterminants. As an application we give an expression of the even power of the Vandermonde in term of Jack polynomials.
Comparison of three vision screening measures for use with primary school students
Creators: name: Reynolds, Jeanette
Publisher: name: University of British Columbia
Year: 2010

description: Literature regarding the vision care needs of school children indicates that a variety of visual anomalies occur in sufficient numbers among children to warrant recommendation of a comprehensive school vision screening programme. A quasi-experimental study was conducted to investigate the referral efficacy (accuracy) of the Keystone Telebinocular (KTT), the Modified Telebinocular (MTT), and the Snellen against a standard optometric exam. Sixty children, aged 6-0 to 9-11, who had scheduled appointments with one of five optometrists in Coquitlam, Surrey, and White Rock, British Columbia, were administered the three screening measures, a letter identification test, and a standard optometric examination. Subjects' performance on each screening measure was compared to their performance on the standard optometric exam and categorized as a positive referral, a negative referral, an overreferral, or an underreferral. Chi-square and phi coefficient analyses were used to make the following comparisions: 1) the referral efficacy of the MTT versus that of the KTT, 2) the referral efficacy of the MTT versus that of the Snellen, 3) the referral efficacy of the KTT versus that of the Snellen. The MTT had greater efficacy than the Snellen for positive referrals (X² ( 1 ) = 7 . 000 , p<.0l) and underref errals (X² ( 1 )=8 . 909, p<.0l). The Snellen had greater efficacy than either the MTT (X² (1 ) =7 . 363 , p<.01 ) or the KTT (X² (1)=5 . 444, p<.05) for overreferrals. Overreferrals and underreferrals were both undesirable, with underreferrals being the more serious. In addition to statistical performance, the suitability of test requirements for the target population and ease of administration were also considered in evaluating the usefulness of a screening measure. When all the factors of vision screening were considered, the MTT proved to be the superior procedure for identifying children requiring professional care.
A new method for determining the sensitivity of X-ray imaging observations and the X-ray number counts
Creators: name: Georgakakis, A.
name: Nandra, K.
name: Laird, E. S.
name: Aird, J.
name: Trichas, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new method for determining the sensitivity of X-ray imaging observations, which correctly accounts for the observational biases that affect the probability of detecting a source of a given X-ray flux, without the need to perform a large number of time consuming simulations. We use this new technique to estimate the X-ray source counts in different spectral bands (0.5-2, 0.5-10, 2-10 and 5-10keV) by combining deep pencil-beam and shallow wide-area Chandra observations. The sample has a total of 6295 unique sources over an area of $\rm 11.8deg^2$ and is the largest used to date to determine the X-ray number counts. We determine, for the first time, the break flux in the 5-10 keV band, in the case of a double power-law source count distribution. We also find an upturn in the 0.5-2keV counts at fluxes below about 6e-17erg/s/cm2. We show that this can be explained by the emergence of normal star-forming galaxies which dominate the X-ray population at faint fluxes. The fraction of the diffuse X-ray background resolved into point sources at different spectral bands is also estimated. It is argued that a single population of Compton thick AGN cannot be responsible for the entire unresolved X-ray background in the energy range 2-10keV.
description: Accepted for publication in MNRAS. Data products available at http://astro.imperial.ac.uk/research/xray/
Hydrogel sphere impact cratering, spreading and bouncing on granular media
Creators: name: Ye, Xiaoyan
name: van der Meer, Devaraj
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The impact of a hydrogel sphere onto a granular target results in both the deformation of the sphere and the formation of a prominent topographic feature known as impact crater on the granular surface. We investigate the crater formation and scaling, together with the spreading diameter and post-impact dynamics of the spheres by performing a series of experiments, varying the Young's modulus $Y$ and impact speed $U_{0}$ of the hydrogel spheres, and the packing fraction and grain size of the granular target. We determine how the crater diameter and depth depend on $Y$ and find the data to be consistent with those from earlier experiments using droplets and hard spheres. Most specifically, we find that the crater diameter data are consistent with a power law, where the power exponent changes more sharply when $Y$ becomes less than $200$ Pa. Next, we introduce an estimate for the portion of the impact kinetic energy that is stored in elastic energy during impact, and thus correct the energy that remains available for crater formation. Subsequently, we determine the deformation of the hydrogel sphere and find that the normalized spreading diameter data are well collapsed introducing an equivalent velocity from an energy balance of the the initial kinetic energy against surface and elastic energy. Finally, we observe that under certain intermediate values for the Young's modulus and impact velocities, the particles rebound from the impact crater. We determine the phase diagram and explain our findings from a comparison of the elastocapillary spreading time and the impact duration.
Conformal oxide coating of Carbon Nanotubes
Creators: name: Kawasaki, S.
name: Catalan, G.
name: Fan, H.
name: Saad, M. M.
name: Gregg, J. M.
name: Correa-Duarte, M. A.
name: Rybczynski, J.
name: Morrison, F. D.
name: Tatsuta, T.
name: Tsuji, O.
name: Scott, J. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The International Roadmap for Ferroelectric Memories requires three-dimensional integration of high-dielectric materials onto metal interconnects or bottom electrodes by 2010. We report the first integration of high-dielectric oxide films onto carbon nanotube electrodes with an aim of ultra-high integration density of FeRAMs (Tb/in2).
description: 4 pages, 3 figures
title: Athen, Griechenland. Aufarbeitung der Geschichte des DAI Athen. Die Arbeiten der Jahre 2017 und 2018
Creators: name: Kankeleit, Alexandra
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: e-Forschungsberichte, Faszikel 1 (2019)
description: In July 2016 the project “Reappraising the History of the DAI Athens during the National Socialist Era” began. At the end of the project, the research findings are due to be presented in a monograph. Since then, there have been regular progress reports in the form of talks and essays on specific topics and questions. The research in both German and Greek archives offers insight into an historical epoch from which we are now divided by over two generations. The focus is on concrete events and activities, but also personal feelings and experiences which can provide information about the role of the German Archaeological Institute in Athens.
BCB Based Packaging for Low Actuation Voltage RF MEMS Devices
Creators: name: Peyrou, David
name: Pennec, Fabienne
name: Achkar, Hikmat
name: Pons, Patrick
name: Coccetti, Fabio
name: Aubert, Hervé
name: Plana, Robert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: This paper outlines the issues related to RF MEMS packaging and low actuation voltage. An original approach is presented concerning the modeling of capacitive contacts using multiphysics simulation and advanced characterization. A similar approach is used concerning packaging development where multi-physics simulations are used to optimize the process. A devoted package architecture is proposed featuring very low loss at microwave range.
Magnetic textures in a hexaferrite thin film and their response to magnetic fields revealed by phase microscopy
Creators: name: Kotani, Atsuhiro
name: Harada, Ken
name: Malac, Marek
name: Nakajima, Hiroshi
name: Kurushima, Kosuke
name: Mori, Shigeo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated magnetic textures in a Sc-doped hexaferrite film by means of phase microscopy (PM) with a hole-free phase plate in a transmission electron microscope. In a zero magnetic field, the stripe-shaped magnetic domains coexist with magnetic bubbles. The magnetization in both magnetic domains was oriented perpendicular to the film and the domain walls have an in-plane magnetization. In the remnant state at 9.2 mT, several magnetic bubbles were formed with the formation of stripe-shaped magnetic domains, and the out-of-plane component in the stripe-shaped domains gradually appeared as the film thickness increased. As the film thickness increases further, the magnetic bubbles with clockwise or counter-clockwise spin helicities formed a triangular lattice. These results in the remnant state suggest that the domain wall energy in the magnetic bubble domains is lower in the thicker region.
IQ, cognitive level, and related information processing variables as predictors of problem finding ability in intellectually gifted children
Creators: name: Porath, Marion
Publisher: name: University of British Columbia
Year: 2010

description: This study was an investigation of the roles of IQ, cognitive level, and related information processing variables as predictors of problem finding ability in intellectually gifted children. It was hypothesized that cognitive level would contribute the most to the prediction of problem finding, followed in importance firstly by the information processing variable of insight and secondly by IQ. It was further hypothesized that cognitive level would mediate the prediction of problem finding by insight. The sample consisted of 76 children in grades five, six, and seven. Subjects of varying ability were included in the sample in order to clarify the hypothesized predictive relationships. The children were administered a problem finding task, a set of insight puzzles, a test of formal reasoning, and a group IQ test. Using the linear multiple regression model, the criterion variable, problem finding, was regressed on the predictor variables cognitive level, insight, and IQ. Backward and stepwise selection procedures were used. A replacement-deletion procedure was used to test the mediation of insight by formal operations. Additional correlational analyses supplemented the primary regression analysis. The results revealed that cognitive level and insight were not significant predictors of problem finding. This was thought to be due to a "floor effect" stemming from the low cognitive maturity of the sample. IQ as a predictor of problem finding was in the expected direction, although the amount of variance accounted for was minimal. Formal reasoning was found to mediate the prediction of problem finding by insight. Significant correlations between certain of the formal reasoning schemata and two of the insight processes appeared to support this mediating effect. It was concluded that even bright children are constrained by maturation in their ability to find problems and solve insight puzzles. There are implications inherent in these constraints for age-appropriate definitions of giftedness. Age-appropriate curriculum for the gifted was another implication stemming from the findings of the study.
title: Eswatini. Maßnahmen zur Verbesserung der Kulturgüterschutzinfrastruktur. Die Arbeiten der Jahre 2017 und 2018
Creators: name: Linstädter, Jörg
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: e-Forschungsberichte, Faszikel 1 (2019)
description: The DAI is currently engaged in several activities in Eswatini (former Swaziland). In 2017, we supplied the National Museum with shelves and packaging material and during two campaigns repacked all artefacts from the old excavations. These were then brought to a new store room, relabeled and reorganized and made assessable for future research. Furthermore, we are supporting the Eswatini National Trust Commission set up a national heritage register by relocating old sites and conducting surveys to discover new sites. In 2019, we will document the endangered site Enkambeni. Finally, we are supporting the University of Eswatini (UNESWA), initiate an archaeology study program. After offering a field school in 2017, we designed an introductory module which is currently being proposed to the university senate.
title: Silk Road Fashion, China. The City and a Gate, the Pass and a Road – Four components that make Luoyang the capital of the Silk Roads between 1st and 7th century AD. The year 2018
Creators: name: Wertmann, Patrick
Publisher: name: Deutsches Archäologisches Institut
Year: 2019

description: Research E-Papers, Faszikel 1 (2019)
description: Im Fokus unserer Forschungen zur Geschichte der alten Seidenstraßen standen vier Fundplätze innerhalb und im Umkreis der zentralchinesischen Stadt Luoyang: (1) die Paläste, Tempel und internationalen Märkte der Stadt Luoyang aus der Zeit der Östlichen Han- bis Nördlichen Wei-Dynastie (1.–6. Jh.) , (2) das Dingding-Stadttor aus der Sui- und Tang-Dynastie (gebaut 605), (3) das bisher einzige physisch erhaltene Straßensegment, der sog. Shihao-Abschnitt der alten Xiaohan-Route, und (4) die als Hangu-Pass bekannte Han-zeitliche Befestigungsanlage und Karawanserei Hangu-Pass (114 v. Chr. – 240 n. Chr.). Für das Funktionieren des überregionalen Seidenstraßenhandels hatten diese vier Orte eine Schlüsselbedeutung und belegen den Status des alten Luoyang als östlichsten Knotenpunkt des weitreichenden Handelsnetzwerks. Alle vier Fundplätze wurden national als große archäologische Entdeckungen Chinas und international mit dem Siegel des UNESCO-Weltkulturerbes ausgezeichnet. Durch den Bau von modernen Fundplatzmuseen sollen ihre Geschichten national und international verbreitet werden. Vor allem aber will man die heutige Stadt Luoyang als Industrie- und Handelszentrum dadurch stärken, dass man an ihre Blüte in historischen Zeiten erinnert. Wagenspuren und Fußabdrücke von Händlern und ihren Lastentieren lassen Erinnerungen an geschäftiges Treiben wieder aufleben. Im Wettbewerb mit der Stadt Xi’an (einst Chang’an) um den Status als „wahren“ östlichen Ausgangspunkt der Seidenstraßen ist das besonders wichtig. Als Teil einer globalen Geschichte über internationale Beziehungen und Austausch spielen die vier Fundplätze heute politisch und wirtschaftlich als Soft-Power eine große Bedeutung für den chinesischen Staat, insbesondere innerhalb der 2013 ins Leben gerufenen Belt-und-Road-Initiative.
Temperature of superconducting transition for very strong coupling in antiadiabatic limit of Eliashberg equations
Creators: name: Sadovskii, M. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is shown that the famous Allen -- Dynes asymtotic limit for superconducting transition temperature in very strong coupling region $T_{c}>\frac{1}{2π}\sqrtλΩ_0$ (where $λ\gg 1$ - is Eliashberg - McMillan electron - phonon coupling constant and $Ω_0$ - the characteristic frequency of phonons) in antiadiabatic limit of Eliashberg equations $Ω_0/D\gg 1$ ($D\sim E_F$ is conduction band half-width and $E_F$ is Fermi energy) is replaced by $T_c>(2π^4)^{-1/3}(λDΩ_0^2)^{1/3}$, with the upper limit for $T_c$ given by $T_c
description: 4 pages, 2 figures
IGR J22517+2218=MG3 J225155+2217: a new gamma-ray lighthouse in the distant Universe
Creators: name: Bassani, L.
name: Landi, R.
name: Malizia, A.
name: Fiocchi, M. T.
name: Bazzano, A.
name: Bird, A. J.
name: Dean, A. J.
name: Gehrels, N.
name: Giommi, P.
name: Ubertini, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the identification of a new soft gamma ray source, namely IGR J22517+2218, detected with IBIS/INTEGRAL. The source, which has an observed 20-100 keV flux of ~4 x10^-11 erg cm-2 s-1, is spatially coincident with MG3 J225155+2217, a quasar at z=3.668. The Swift/XRT 0.5-10 keV continuum is flat (Gamma=1.5) with evidence for a spectral curvature below 1-2 keV either due to intrinsic absorption (NH=3 +/- 2 x 10^22 cm-2) or to a change in slope (Delta Gamma= 0.5). X-ray observations indicate flux variability over a 6 days period which is further supported by a flux mismatch between Swift and INTEGRAL spectra. IGR J22517+2218 is radio loud and has a flat radio spectrum; optically it is a broad line emitting quasar with the atypical property of hosting a narrow line absorption system. The Source Spectral Energy Distribution is unusual compared to blazars of similar type: either it has the synchrotron peak in the X/gamma-ray band (i.e. much higher than generally observed) or the Compton peak in the MeV range (i.e. lower than typically measured). IGR J22517+2218=MG3 J225155+2217 is the second most distant blazar detected above 20 keV and a gamma-ray lighthouse shining from the edge of our Universe.
description: 4 pages, 4 figures, Accepted for publication in Astrophysical Journal Letters
The causal structure of dynamical charged black holes
Creators: name: Hong, Sungwook E.
name: Hwang, Dong-il
name: Stewart, Ewan D.
name: Yeom, Dong-han
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the causal structure of dynamical charged black holes, with a sufficient number of massless fields, using numerical simulations. Neglecting Hawking radiation, the inner horizon is a null Cauchy horizon and a curvature singularity due to mass inflation. When we include Hawking radiation, the inner horizon becomes space-like and is separated from the Cauchy horizon, which is parallel to the out-going null direction. Since a charged black hole must eventually transit to a neutral black hole, we studied the neutralization of the black hole and observed that the inner horizon evolves into a space-like singularity, generating a Cauchy horizon which is parallel to the in-going null direction. Since the mass function is finite around the inner horizon, the inner horizon is regular and penetrable in a general relativistic sense. However, since the curvature functions become trans-Planckian, we cannot saymore about the region beyond the inner horizon, and it is natural to say that there is a 'physical' space-like singularity. However, if we assume an exponentially large number of massless scalar fields, our results can be extended beyond the inner horizon. In this case, strong cosmic censorship and black hole complementarity can be violated.
description: 23 pages, 23 figures
PERFORMANCES OF A CM-SCALE WATER FLOW ENERGY HARVESTER IN REAL ENVIRONMENT FOR AUTONOMOUS FLOWMETERS
Creators: name: Saoutieff, Elise
name: Gasnier, Pierre
name: Boisseau, Sebastien
name: OjerAranguren, Javier
name: Rodot, Isabelle
Publisher: name: Zenodo
Year: 2018
Subjects: energy harvester
autonomous flowmeters

description: The H2020 European project InDeal is an innovative project focused on the development of energy-efficient, eco-friendly and cost effective solutions for district heating and cooling system (DHCS). The project’s goal is to lower energy demand for DHC and to improve systems’ efficiency by creating the tools for better system monitoring what can lower energy losses and reduce bills for the consumers. In the project, CEA developed 2 demonstrators, one water flow energy harvester and one thermal energy harvester. The aims are (i) to make smart flow meters able to work for years without any human intervention by replacing batteries and (ii) to improve the quality and to reduce the costs of water networks monitoring (flowrate, temperature, pressure,leakage detection, pH meters ...).
The Star Formation Rate - Dense Gas Relation in Galaxies as Measured by HCN (3-2) Emission
Creators: name: Bussmann, R. S.
name: Narayanan, D.
name: Shirley, Y. L.
name: Juneau, S.
name: Wu, J.
name: Solomon, P. M.
name: Bout, P. A. Vanden
name: Moustakas, J.
name: Walker, C. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present observations made with the 10m Heinrich Hertz Sub-Millimeter Telescope of HCN (3-2) emission from a sample of 30 nearby galaxies ranging in infrared luminosity from 10^10 - 10^12.5 L_sun and HCN (3-2) luminosity from 10^6 - 10^9 K km s^-1 pc^2. We examine the correlation between the infrared luminosity and HCN (3-2) luminosity and find that the best fit linear regression has a slope (in log-log space) of 0.74+/-0.12. Including recently published data from Gracia-Carpio et al. tightens the constraints on the best-fit slope to 0.79+/-0.09. This slope below unity suggests that the HCN (3-2) molecular line luminosity is not linearly tracing the amount of dense gas. Our results are consistent with predictions from recent theoretical models that find slopes below unity when the line luminosity depends upon the average gas density with a power-law index greater than a Kennicutt-Schmidt index of 1.5.
description: 4 pages, 1 table, 2 figures; accepted to the ApJL
Discovery of diffuse radio emission at the center of the most X-ray-luminous cluster RX J1347.5-1145
Creators: name: Gitti, Myriam
name: Ferrari, Chiara
name: Domainko, Wilfried
name: Feretti, Luigina
name: Schindler, Sabine
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on new VLA radio observations of the distant cluster RX J1347.5-1145, which is the most luminous in X-rays. We aim at investigating the possible presence of diffuse and extended radio emission in this very peculiar system which shows both a massive cooling flow and merging signatures. New low resolution (~18 arcsec) VLA radio observations of this cluster are combined with higher resolution (~2 arcsec) data available in the VLA archive. We discover the presence of a diffuse and extended (~500 kpc) radio source centered on the cluster, unrelated to the radio emission of the central AGN. The properties of the radio source, in particular a) its occurrence at the center of a massive cooling flow cluster, b) its total size comparable to that of the cooling region, c) its agreement with the observational trend between radio luminosity and cooling flow power, indicate that RX J1347.5-1145 hosts a radio mini-halo. We suggest that the radio emission of this mini-halo, which is the most distant object of its class discovered up to now, is due to electron re-acceleration triggered by the central cooling flow. However, we also note that the morphology of the diffuse radio emission shows an elongation coincident with the position of a hot subclump detected in X-rays, thus suggesting that additional energy for the electron re-acceleration might be provided by the submerger event.
description: 5 pages, 6 figures, accepted for publication in A&A Letters
New coins from old, smoothly
Creators: name: Holtz, Olga
name: Nazarov, Fedor
name: Peres, Yuval
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 65C50, 41A10, 41A25, 41A17, 60C05, 68U20, 41A36, 41A27, 41A28

description: Given a (known) function $f:[0,1] \to (0,1)$, we consider the problem of simulating a coin with probability of heads $f(p)$ by tossing a coin with unknown heads probability $p$, as well as a fair coin, $N$ times each, where $N$ may be random. The work of Keane and O'Brien (1994) implies that such a simulation scheme with the probability $¶_p(Nn)$ decaying exponentially in $n$ for every $p \in S$. We prove that for $α>0$ non-integer, $f$ is in the space $C^α[0,1]$ if and only if a simulation scheme as above exists with $¶_p(N>n) \le C (Δ_n(p))^α$, where $Δ_n(x)\eqbd \max \{\sqrt{x(1-x)/n},1/n \}$. The key to the proof is a new result in approximation theory: Let $\B_n$ be the cone of univariate polynomials with nonnegative Bernstein coefficients of degree $n$. We show that a function $f:[0,1] \to (0,1)$ is in $C^α[0,1]$ if and only if $f$ has a series representation $\sum_{n=1}^\infty F_n$ with $F_n \in \B_n$ and $\sum_{k>n} F_k(x) \le C(Δ_n(x))^α$ for all $ x \in [0,1]$ and $n \ge 1$. We also provide a counterexample to a theorem stated without proof by Lorentz (1963), who claimed that if some $ϕ_n \in \B_n$ satisfy $|f(x)-ϕ_n(x)| \le C (Δ_n(x))^α$ for all $ x \in [0,1]$ and $n \ge 1$, then $f \in C^α[0,1]$.
description: 29 pages; final version; to appear in Constructive Approximation