cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum stochastic cocycles and completely bounded semigroups on operator spaces II
Creators: name: Lindsay, J. Martin
name: Wills, Stephen J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 81S25, 46L53, Secondary 46N50, 47D06

description: Quantum stochastic cocycles provide a basic model for time-homogeneous Markovian evolutions in a quantum setting, and a direct counterpart in continuous time to quantum random walks, in both the Schrodinger and Heisenberg pictures. This paper is a sequel to one in which correspondences were established between classes of quantum stochastic cocycle on an operator space or C*-algebra, and classes of Schur-action `global' semigroup on associated matrix spaces over the operator space. In this paper we investigate the stochastic generation of cocycles via the generation of their corresponding global semigroups, with the primary purpose of strengthening the scope of applicability of semigroup theory to the analysis and construction of quantum stochastic cocycles. An explicit description is given of the affine relationship between the stochastic generator of a completely bounded cocycle and the generator of any one of its associated global semigroups. Using this, the structure of the stochastic generator of a completely positive quasicontractive quantum stochastic cocycle on a C*-algebra whose expectation semigroup is norm continuous is derived, giving a comprehensive stochastic generalisation of the Christensen--Evans extension of the GKS&L theorem of Gorini, Kossakowski and Sudarshan, and Lindblad. The transformation also provides a new existence theorem for cocycles with unbounded structure map as stochastic generator. The latter is applied to a model of interacting particles known as the quantum exclusion Markov process, in particular on integer lattices in dimensions one and two.
description: 44 pages; to appear in CMP
HI gas in rejuvenated radio galaxies: GMRT observations of the DDRG J1247+6723
Creators: name: Saikia, D. J.
name: Gupta, Neeraj
name: Konar, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of HI absorption towards the inner double of the double-double radio galaxy (DDRG) J1247+6723 with the Giant Metrewave Radio Telescope (GMRT). The inner double is a Giga-hertz peaked spectrum (GPS) source with a linear size of 14 pc while the overall size defined by the outer double is 1195 kpc, making it a giant radio source. The absorption profile is well resolved and consists of a number of components on either side of the optical systemic velocity. The neutral hydrogen column density is estimated to be N(HI)=6.73*10^{20}(T_s/100)(f_c/1.0) cm^{-2}, where T_s and f_c are the spin temperature and covering factor of the background source respectively. We explore any correlation between the occurrence of HI absorption and rejuvenation of radio activity and suggest that there could be a strong relationship between them.
description: 5 pages, 2 figures, accepted for publication in MNRAS Letters
A Laser-ARPES View of the 2D Electron Systems at LaAlO3/SrTiO3 and Al/SrTiO3 Interfaces
Creators: name: Walker, Siobhan McKeown
name: Boselli, Margherita
name: Martínez, Emanuel A.
name: Gariglio, Stefano
name: Bruno, Flavio Y.
name: Baumberger, Felix
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have measured the electronic structure of the two-dimensional electron system (2DES) found at the Al/SrTiO3 (Al/STO) and LaAlO3/SrTiO3 (LAO/STO) interfaces by means of laser angle resolved photoemission spectroscopy, taking advantage of the large photoelectron escape depth at low photon energy to probe these buried interfaces. We demonstrate the possibility of tuning the electronic density in Al/STO by varying the Al layer thickness and show that the electronic structure evolution is well described by self-consistent tight binding supercell calculations, but differs qualitatively from a rigid band shift model. We show that both 2DES are strongly coupled to longitudinal optical phonons, in agreement with previous reports of a polaronic ground state in similar STO based 2DESs. Tuning the electronic density in Al/STO to match that of LAO/STO and comparing both systems, we estimate that the intrinsic LAO/STO 2DES has a bare band width of ~ 60 meV and a carrier density of ~ 6 10^13 cm-2.
description: This is the submitted version of the manuscript. Accepted for publication in Advanced Electronic Materials
Large deviations for Kac-like walks
Creators: name: Basile, Giada
name: Benedetto, Dario
name: Bertini, Lorenzo
name: Orrieri, Carlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce a Kac's type walk whose rate of binary collisions preserves the total momentum but not the kinetic energy. In the limit of large number of particles we describe the dynamics in terms of empirical measure and flow, proving the corresponding large deviation principle. The associated rate function has an explicit expression. As a byproduct of this analysis, we provide a gradient flow formulation of the Boltzmann-Kac equation.
Precessing vortex motion and instability in a rotating column of superfluid 3He-B
Creators: name: Hanninen, R.
name: Eltsov, V. B.
name: Finne, A. P.
name: de Graaf, R.
name: Kopu, J.
name: Krusius, M.
name: Solntsev, R. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The flow of quantized vortex lines in superfluid 3He-B is laminar at high temperatures, but below 0.6 Tc turbulence becomes possible, owing to the rapidly decreasing mutual friction damping. In the turbulent regime a vortex evolving in applied flow may become unstable, create new vortices, and start turbulence. We monitor this single-vortex instability with NMR techniques in a rotating cylinder. Close to the onset temperature of turbulence, an oscillating component in NMR absorption has been observed, while the instability generates new vortices at a low rate ~ 1 vortex/s, before turbulence sets in. By comparison to numerical calculations, we associate the oscillations with spiral vortex motion, when evolving vortices expand to rectilinear lines.
description: revised version: 7.3 pages, 9 figures submitted to Phys. Rev. B
New security and control protocol for VoIP based on steganography and digital watermarking
Creators: name: Mazurczyk, Wojciech
name: Kotulski, Zbigniew
Publisher: name: arXiv
Year: 2006
Subjects: subject: Cryptography and Security (cs.CR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences
subject: C.2.0; K.4.6

description: In this paper new security and control protocol for Voice over Internet Protocol (VoIP) service is presented. It is the alternative for the IETF's (Internet Engineering Task Force) RTCP (Real-Time Control Protocol) for real-time application's traffic. Additionally this solution offers authentication and integrity, it is capable of exchanging and verifying QoS and security parameters. It is based on digital watermarking and steganography that is why it does not consume additional bandwidth and the data transmitted is inseparably bound to the voice content.
description: 8 pages, 4 figures, 1 table
A community-based approach to watershed conservation in Texas
Creators: name: Garrett, Gary
Publisher: name: F1000Research
Year: 2015

description: Texas Parks and Wildlife Department has initiated an innovative approach to fish and wildlife conservation in Texas. By working with alliances of landowners, we provide a holistic approach to technical guidance and help to secure funding for restoration and conservation actions throughout targeted watersheds. Although we have projects in many locations in the state, our most successful utilizes the State Fish of Texas (Micropterus treculii) as an iconic symbol that provides a positive, high-profile image of the need and benefits of conservation. We chose the Llano River Watershed to initiate the Guadalupe Bass Restoration Initiative and to date, have 16 restoration projects underway in the watershed that encompass 21,000 hectares and 56 kilometers of rivers and streams. Projects focus on actions that restore riparian areas, reduce soil erosion and runoff, increase infiltration and aquifer recharge, improve water quality and enhance habitat for both aquatic and terrestrial species. Through the initiative, we promote awareness and stewardship of fish and wildlife habitats, share Best Management Practices, organize community involvement in local habitat conservation projects provide technical guidance and planning assistance, and help leverage available resources. Additionally, in 2011 and 2012, we stocked over 275,000 genetically-pure Guadalupe bass in the South Llano River to reverse the trend of hybridization with the non-native smallmouth bass. We also supported studies on fish community and habitat analysis in the Llano River Watershed and partnered with landowners to develop a Watershed Conservation Plan. We are now in the process of developing a Habitat Conservation Demonstration Area (CDA) that extends over an eight-kilometer segment of the Llano River. The CDA will provide fishing, paddling and hiking opportunities, promote sustainable public use of the river, and highlight restoration actions through educational kiosks placed along paddling and upland hiking trails.
Recordings of child language and child-caregiver interaction with Child 10, a female child aged 5 years, 1 month, 28 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of object play between this child and her primary caregiver. Researcher present.

Audio and video recordings of free play between this child and her primary caregiver. Researcher not present.

Text file describing contents of recordings.

This is the same child as Child 32 in the materials collected in 2019 (Bundle 2018-19.070). She was not recorded in the 2022 materials, except incidentally in the recordings of her brother, recorded in 2022 as Child 17 and 2019 as Child 31.
Una Gap-Thematic Analysis sul concetto di Organizzazione a Rete: Da Architettura Sociale Atavica A “Innovazione” (Ri-)Emergente
Creators: name: Modarelli, Giuseppe
name: Rainero, Christian
Publisher: name: ----
Year: 2023
Subjects: network organization, boscimani, blockchain, antropologia, gap-thematic analysis, semiotica

description: La ricerca fornisce un’originale configurazione di base sull’enfasi emergente inerente all’architettura dell’organizzazione reticolare. Lo studio analizza questa dimensione sia come costrutto sociale pre-esistente, sia come artefatto contemporaneo. L’indagine, prevalentemente incentrata su una analisi letteraria, di base antropologico-etnografica indiretta e socio-organizzativa, tiene conto del parallelismo effettuato con la struttura socio-organizzativa dei Boscimani (popolazione primordiale dellAfrica meridionale). Viene altresì comparata la natura di sistemi a rete decentralizzata di stampo emergente come la blockchain. La dimensione di interesse sarebbe riscontrata dalla scarsa presenza di contributi letterari in tale ambito specifico integrato e transdisciplinare, tra innovazione, teoria organizzativa, antropologia e semiotica. In questo senso, i principali risultati sono stati forniti attraverso una prospettiva di analisi letteraria che tiene conto delle dimensioni sopra citate (organizzazione a rete contemporanea, atavico-tribale e architettura blockchain), intersecando rispettivamente una logica interagente di presente, passato e futuro, al fine di verificare l’effettiva utilità di investigare approfonditamente ulteriori aspetti connessi alla pratica della business anthropology, fornendo nuovi spunti di indagine. La ricerca di carattere esplorativo e posizionale evidenzia specificamente una analisi di relazione semiotica al fine di definire contesti e significati afferenti alla principale fonte investigativa: l’organizzazione a rete esaminata da un lato (i) sotto il profilo antropologico in relazione al sistema socio-organizzativo tribale dei Boscimani, dall’altro (ii) di innovazione in relazione alla dimensione strutturale della tecnologia blockchain e ancora sotto il profilo (iii) di (ri-)emergente considerazione della organizzazione a rete come soluzione win-win anticrisi.
description: ----, Vol 14, No 4 (2023): ISSUE 4/2023
Static Safety for an Actor Dedicated Process Calculus by Abstract Interpretation
Creators: name: Garoche, Pierre-Loïc
name: Pantel, Marc
name: Thirioux, Xavier
Publisher: name: arXiv
Year: 2006
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The actor model eases the definition of concurrent programs with non uniform behaviors. Static analysis of such a model was previously done in a data-flow oriented way, with type systems. This approach was based on constraint set resolution and was not able to deal with precise properties for communications of behaviors. We present here a new approach, control-flow oriented, based on the abstract interpretation framework, able to deal with communication of behaviors. Within our new analyses, we are able to verify most of the previous properties we observed as well as new ones, principally based on occurrence counting.
Electron doping of the iron-arsenide superconductor CeFeAsO controlled by hydrostatic pressure
Creators: name: Mydeen, K.
name: Jesche, A.
name: Meier-Kirchner, K.
name: Schwarz, U.
name: Geibel, C.
name: Rosner, H.
name: Nicklas, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the iron-pnictide material CeFeAsO not only the Fe moments, but also the local 4f moments of the Ce order antiferromagnetically at low temperatures. We elucidate on the peculiar role of the Ce on the emergence of superconductivity. While application of pressure suppresses the iron SDW ordering temperature monotonously up to 4 GPa, the Ce-4f magnetism is stabilized, until both types of magnetic orders disappear abruptly and a narrow SC dome develops. With further increasing pressure characteristics of a Kondo-lattice system become more and more apparent in the electrical resistivity. This suggests a connection of the emergence of superconductivity with the extinction of the magnetic order and the onset of Kondo-screening of the Ce-4f moments.
description: 6 pages, 3 figures + supplemental material
On the interest of semi-supervised approaches with spacial dependence in structural alphabet encoding
Creators: name: Allam, Ikram
name: Flatters, Delphine
name: Regad, Leslie
name: Anne-Claude Camproux
name: Nuel, Grégory
Publisher: name: F1000Research
Year: 2015

description: Structural alphabet (SA) has proved to be a powerful tool to compress the three dimensional protein conformations (3D) of proteins into a one-dimensional representation (1D) by encoding protein fragments  into structural sequences or Structural Letter sequences (SLs) which can be analysed using standard  sequence analysis Tools. SA has demonstrated its usefulness for protein analysis through many applications such as protein classification, structure alignment, structure fast comparison, extraction of functional motifs, etc.

The development of a SA able to integrate the flexibility of the 3D structure of proteins and their cavity (pocket) capable of binding drug is a crucial challenge in the drug design and drug discovery domains. This is now possible thanks to the growing number of protein 3D structures identified in the 3D protein databank PDB (≈99,642 structures).

In this work, we present a brief review of the various SA available to encode 3D PDB structures into SL. These various SA are based on mixture models, hidden Markov models (HMM) or classification tools. We then evaluate the interest of two fundamental concepts: a) unsupervised or semi-supervised training of SA; b) accounting or not for the spacial dependence between protein fragments.

The results show that the integration of the semi-supervised approach with fragment spacial dependence, typically through HMM, can dramatically improve the performance of SA. It could be a very promising approach for drug design applications.
Re II and Other Exotic Spectra in HD 65949
Creators: name: Cowley, C. R.
name: Hubrig, S.
name: Wahlgren, G. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Powerful astronomical spectra reveal an urgent need for additional work on atomic lines, levels, and oscillator strengths. The star HD 65949 provides some excellent examples of species rarely identified in stellar spectra. For example, the Re II spectrum is well developed, with 17 lines between 3731 and 4904 [A], attributed wholly or partially to Re II. Classifications and oscillator strengths are lacking for a number of these lines. The spectrum of Os II is well identified. Of 14 lines attributed wholly or partially to Os II, only one has an entry in the VALD database. We find strong evidence that Te II is present. There are NO Te II lines in the VALD database. Ru II is clearly present, but oscillator strengths for lines in the visual are lacking. There is excellent to marginal evidence for a number of less commonly identified species, including Kr II, Nb II, Sb II, Xe II, Pr III, Ho III, Au II, and Pt II (probably Pt-198), to be present in the spectrum of HD 65949. The line Hg II at 3984 [A] is of outstanding strength, and all three lines of Multiplet 1 of Hg I are present, even though the surface temperature of HD 65949 is relatively high. Finally, we present the case of an unidentified, 24 [mA], line at 3859.63 [A], which could be the same feature seen in magnetic CP stars. It is typically blended with a putative U II line used in cosmochronology.
description: ASOS9 Poster (Lund, Sweden, August 2007), to be published in Journal of Physics: Conference Series (JPCS), 6 pages 1 figure
Big data in health care and biomedical research
Creators: name: Quackenbush, John
Publisher: name: F1000Research
Year: 2015

description: Every major scientific and technological revolution in history has been driven by one thing: access to data. Today, the availability of Big Data from a wide variety of sources is transforming health and biomedical research into an information science, where discovery is fueled by our ability to effectively collect, manage, analyze, and interpret data, and where Improving outcomes and controlling cost require effective use of available information. Realizing Big Data’s full potential will require that we develop new analytical methods to address a number of fundamental issues and that we develop new ways of integrating, comparing, and synthesizing information, and that we develop approaches that allow us to communicate want we learn in an intuitive and useful fashion to a variety of “consumers” each of whom has unique needs for data access. If we are successful, we have the opportunity to both dramatically improve our understanding of human disease and to implement protocols that will ultimately help to contain costs. Using concrete examples from our work, I will present some vignettes that highlight the challenges and opportunities that present themselves in today’s data rich environment in health care and biomedical research.
Self-Compression of High-Intensity Femtosecond Laser Pulses in Low Dispersion Regime
Creators: name: Koprinkov, I. G.
name: Todorov, M. D.
name: Todorova, M. E.
name: Todorov, T. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Self-compression of femtosecond laser pulses and more than an order of magnitude increase of the peak intensity is found in a positive dispersion medium in low dispersion regime based on the (3+1)-dimensional nonlinear Schr{ö}dinger equation. A method of high-intensity femtosecond pulse formation can be developed on that basis.
description: 4 pages, miktex, 3 figures
On matrix Painlevé II equations
Creators: name: Adler, V. E.
name: Sokolov, V. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Painlevé--Kovalevskaya test is applied to find three matrix versions of the Painlevé II equation. All these equations are interpreted as group-invariant reductions of integrable matrix evolution equations, which makes it possible to construct isomonodromic Lax pairs for them.
description: 13 pages
Recent advances and future perspectives of single-photon avalanche diodes for quantum photonics applications
Creators: name: Ceccarelli, Francesco
name: Acconcia, Giulia
name: Gulinatti, Angelo
name: Ghioni, Massimo
name: Rech, Ivan
name: Osellame, Roberto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Photonic quantum technologies promise a revolution of the world of information processing, from simulation and computing to communication and sensing, thanks to the many advantages of exploiting single photons as quantum information carriers. In this scenario, single-photon detectors play a key role. On the one hand, superconducting nanowire single-photon detectors (SNSPDs) are able to provide remarkable performance on a broad spectral range, but their applicability is often limited by the need of cryogenic operating temperatures. On the other hand, single-photon avalanche diodes (SPADs) overcome the intrinsic limitations of SNSPDs by providing a valid alternative at room temperature or slightly below. In this paper, we review the fundamental principles of the SPAD operation and we provide a thorough discussion of the recent progress made in this field, comparing the performance of these devices with the requirements of the quantum photonics applications. In the end, we conclude with our vision of the future by summarizing prospects and unbeaten paths that can open new perspectives in the field of photonic quantum information processing.
AN OVERVIEW OF PERSPECTIVES AND UPDATES IN IMMUNIZATION FOR DENTAL CARIES
Creators: name: Heba Moneib Alkhateeb,Jamal Mousa Alotaibi,Talal Naif Almutairi,4Haitham Abdulrahman Alghamdi,Abrar Aqeel Jefri,Khalid Ahmed Alharbi,Saeed Abdullah Alghamdi
Publisher: name: Zenodo
Year: 2024

description: Dental caries is a non-reversible infectious condition caused by microorganisms. Streptococci mutans, S.sobrinus, and Lactobacillus are the main causative agents of dental caries. S.mutans adheres to the tooth pellicle via adhesions. This leads to the synthesis of GTF and subsequent glucan production, facilitating the colonization of new organisms. Consequently, the initiation of lactic acid formation occurs, resulting in the development of dental caries. To intervene in the immune response, one can inhibit the receptors that are essential for the bacteria's colonization or deactivate GTF. By implementing these strategies, it is possible to achieve immunization against dental caries.
X-ray irradiation of the stellar wind in HMXBs with B supergiants: Implications for ULXs
Creators: name: Krticka, J.
name: Kubat, J.
name: Krtickova, I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Wind-fed high-mass X-ray binaries are powered by accretion of the radiatively driven wind on the compact star. Accretion-generated X-rays alter the ionization state of the wind. Because higher ionization states drive the wind less effectively, X-ray ionization may brake acceleration of the wind. This causes a decrease in the wind terminal velocity and mass flux in the direction toward the X-ray source. We study the effect of X-ray ionization on the stellar wind of B supergiants. We determine the binary parameters for which the X-ray irradiation significantly influences the stellar wind. This can be studied in diagrams that plot the optical depth parameter versus the X-ray luminosity. For low optical depths or for high X-ray luminosities, X-ray ionization leads to a disruption in the wind aimed toward the X-ray source. Observational parameters of high-mass X-ray binaries with B-supergiant components appear outside the wind disruption zone. The X-ray feedback determines the resulting X-ray luminosity. For low X-ray luminosities, ionization is weak, and the wind is not disrupted by X-rays and flows at large velocities, consequently the accretion rate is relatively low. On the other hand, for high X-ray luminosities, the X-ray ionization disrupts the flow braking the acceleration, the wind velocity is low, and the accretion rate becomes high. These effects determine the X-ray luminosity of individual binaries. Accounting for the X-ray feedback, estimated X-ray luminosities reasonably agree with observational values. We study the effect of small-scale wind inhomogeneities, showing that they weaken the effect of X-ray ionization by increasing recombination and the mass-loss. This effect is particularly important in the region of the bistability jump. We show that ultraluminous X-ray binaries with $L_x<10^{40}$ erg/s may be powered by accretion of a B-supergiant wind on a massive black hole.
description: 11 pages, accepted for publication in Astronomy & Astrophysics
Cardiac physiology of the spiny dogfish (Squalus acanthias)
Creators: name: Gupta, Avinash
Publisher: name: University of British Columbia
Year: 2009

description: The elasmobranch heart is comprised of four sequentially arranged chambers, the sinus venosus, the atrium, the ventricle and the conus arteriosus. The heart lies within a semi-rigid, capacious pericardial cavity which is provided with a communicating duct to the abdomen, the pericardio-peritoneal canal. The first part of this investigation focused on clarifying the role of the conus arteriosus on output pressure and flow. Satchell & Jones (1967) proposed that the contraction of the conus serves to prolong cardiac contraction so that the upper tier of valves of the conus do not face the extreme negative intrapericardial pressure, created due to ventricular ejection. They further concluded that the conus does not contribute to either pressure or flow in the ventral aorta. The present work does not confirm these conclusions. Pressure and flow records from the ventral aorta of anaesthetised and unanaesthetised spiny dogfish (Squalus acanthias) show conclusively that conal contraction contributes to output pressure and flow, prolongs the ejection phase of the heart and may serve a depulsator function. Past research has emphasised that a semi-rigid pericardium allows development of negative intrapericardial pressure during ventricular ejection (Sudak 1965a, Johansen 1965, Satchell 1971, Shabetai et al 1985) which in turn aids in filling of the heart through suction (vis-d-fronte filling). However, recent studies on leopard sharks (Lai et al 1990) suggested that filling of the heart through suction is not important. Instead the heart is filled by positive venous pressure (vis-a-tergo [Page iii of abstract missing in original document]
Recordings of child language and child-caregiver interaction with Child 8, a female child aged 5 years, 2 months, 0 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of object play between this child and her primary caregiver. Researcher present.

Audio and video recordings of free play between this child and her primary caregiver. Researcher not present.

Text file describing contents of recordings.

This is the same child as Child 22 in the materials collected in 2019 (Bundle 2018-19.060). She was not recorded in the 2022 materials.
Recordings of child language and child-caregiver interaction with Child 7, a male child aged 5 years, 9 months, 26 days
Creators: name: Skilton, Amalia Horan
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: tca

description: Audio and video recordings of object play between this child and his primary caregiver. Researcher present.

Audio and video recordings of free play between this child and his primary caregiver. Researcher not present.

Text file describing contents of recordings.

This is the same child as Child 17 in the materials collected in 2019 (Bundle 2018-19.055). He was not recorded in the 2022 materials.
A characterization of submanifolds by a homogeneity condition
Creators: name: Skopenkov, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 57R50; 58A05; 53A04; 54H11

description: A very short proof of the following smooth homogeneity theorem of D. Repovs, E. V. Scepin and the author is presented. Let N be a locally compact subset of a smooth manifold M. Assume that for each two points x,y in N there exist their neighborhoods Ux and Uy in M and a diffeomorphism h : Ux \to Uy such that h(x)=y and h (Ux \cap N) = Uy \cap N. Then N is a smooth submanifold of M.
description: 4 pages, meaning-distorting typos corrected
Correlation-induced metal insulator transition in a two-channel fermion-boson model
Creators: name: Wellein, G.
name: Fehske, H.
name: Alvermann, A.
name: Edwards, D. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate charge transport within some background medium by means of an effective lattice model with a novel form of fermion-boson coupling. The bosons describe fluctuations of a correlated background. By analyzing groundstate and spectral properties of this transport model, we show how a metal-insulator quantum phase transition can occur for the half-filled band case. We discuss the evolution of a mass-asymmetric band structure in the insulating phase and establish connections to the Mott and Peierls transition scenarios.
description: 4 pages, 4 figures, 1 table, revised version accepted for publication in Phys. Rev. Lett
Quark condensates in the chiral bag with the NJL interaction
Creators: name: Yasui, S.
name: Hosaka, A.
name: Oka, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the quark condensate of the vacuum inside the baryon. We analyze the 1+1 dimensional chiral bag in analogy with the realistic 3+1 dimensional one. The Nambu--Jona-Lasinio (NJL) type interaction is used to investigate the quark condensate in the chiral bag. Considering the strong meson-quark coupling, we solve the mean field solution to the scalar and pseudoscalar channels by including the chiral Casimir effects. The self-consistent equation allows a finite value of the quark condensate and hence a finite dynamical quark mass inside the bag. It is shown that an approximate Cheshire Cat picture holds for massive quarks.
Heterotic compactifications with principal bundles for general groups and general levels
Creators: name: Distler, J.
name: Sharpe, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine to what extent heterotic string worldsheets can describe arbitrary E8xE8 gauge fields. The traditional construction of heterotic strings builds each E8 via a Spin(16)/Z2 subgroup, typically realized as a current algebra by left-moving fermions, and as a result, only E8 gauge fields reducible to Spin(16)/Z2 gauge fields are directly realizable in standard constructions. However, there exist perturbatively consistent E8 gauge fields which can not be reduced to Spin(16)/Z2, and so cannot be described within standard heterotic worldsheet constructions. A natural question to then ask is whether there exists any (0,2) SCFT that can describe such E8 gauge fields. To answer this question, we first show how each ten-dimensional E8 partition function can be built up using other subgroups than Spin(16)/Z2, then construct ``fibered WZW models'' which allow us to explicitly couple current algebras for general groups and general levels to heterotic strings. This technology gives us a very general approach to handling heterotic compactifications with arbitrary principal bundles. It also gives us a physical realization of some elliptic genera constructed recently by Ando and Liu.
description: 48 pages, LaTeX; v2: references added; v3: typos fixed
Hyperfine interaction and magnetoresistance in organic semiconductors
Creators: name: Sheng, Y.
name: Nguyen, D. T.
name: Veeraraghavan, G.
name: Mermer, Ö.
name: Wohlgenannt, M.
name: Scherf, U.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We explore the possibility that hyperfine interaction causes the recently discovered organic magnetoresistance (OMAR) effect. Our study employs both experiment and theoretical modelling. An excitonic pair mechanism model based on hyperfine interaction, previously suggested by others to explain magnetic field effects in organics, is examined. Whereas this model can explain a few key aspects of the experimental data, we, however, uncover several fundamental contradictions as well. By varying the injection efficiency for minority carriers in the devices, we show experimentally that OMAR is only weakly dependent on the ratio between excitons formed and carriers injected, likely excluding any excitonic effect as the origin of OMAR.
description: 10 pages, 7 figures, 1 table
With a Cole-Hopf transformation to solutions of the noncommutative KP hierarchy in terms of Wronski matrices
Creators: name: Dimakis, Aristophanes
name: Muller-Hoissen, Folkert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In case of the KP hierarchy where the dependent variable takes values in an (arbitrary) associative algebra A, it is known that there are solutions which can be expressed in terms of quasideterminants of a Wronski matrix which solves the linear heat hierarchy. We obtain these solutions without the help of quasideterminants in a simple way via solutions of matrix KP hierarchies (over A) and by use of a Cole-Hopf transformation. For this class of exact solutions we work out a correspondence with 'weakly nonassociative' algebras.
description: 10 pages
Genericity of blackhole formation in the gravitational collapse of homogeneous self-interacting scalar fields
Creators: name: Giambó, R.
name: Giannoni, F.
name: Magli, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The gravitational collapse of a wide class of self-interacting homogeneous scalar fields models is analyzed. The class is characterized by certain general conditions on the scalar field potential, which, in particular, include both asymptotically polynomial and exponential behaviors. Within this class, we show that the generic evolution is always divergent in a finite time, and then make use of this result to construct radiating star models of the Vaidya type. It turns out that blackholes are generically formed in such models.
description: 18 pages, 4 figures
Records management attributes in international open document exchange standards
Creators: name: Gregson, Harold Anthony
Publisher: name: University of British Columbia
Year: 2009

description: The thesis is a study of the ability of international open document exchange standards to capture the attributes of the archival document, or record in its electronic form using a set of decontextualized attributes developed by diplomatics. Open document exchange is the ability to exchange documents in their complete form between heterogeneous electronic document management systems. Three standards are examined: ISO 8613 Open Document Architecture (ODA), ISO 10166 Document Filing and Retrieval (DFR), and ISO 8879 Standard Generalized Mark Up Language (SGML) as realized in the Text Encoding Initiative; As distributed computing becomes common, there is a growing need for such standards, but their usefulness to archivists and recordskeeping systems depends on their ability to recognize the record. Open document exchange standards function by setting broad descriptive requirements without prescribing the specific implementation by any given system. In describing documents, they are therefore in need of a terminology that is free of any particular records context. The thesis proposes that the archival science of diplomatics is capable of providing a complete set of decontextualized descriptors, or attributes, that encompass all aspects of the archival document or record. Since diplomatics is based on a scientific analysis of documents, and makes use of terminology that has long been in use by records creators and keepers, it is proposed that diplomatics terminology should be treated as a surrogate international standard in defining the attributes of the document profile and the logical and layout structure of documents. Diplomatics concepts can then be used as the basis for describing records attributes in the document profile of electronic records management systems. The thesis demonstrates this proposition by means of a thesaurus which maps attributes and concepts of SGML, ODA, and DFR against diplomatic terminology.
The influence of knowledge risks on firm sustainability mediated by knowledge management capabilities
Creators: name: Borgia, Michele
name: Rangone, Adalberto
name: La Torre, Maura
Publisher: name: Economia Aziendale Online -
Year: 2023
Subjects: knowledge risks, sustainability, knowledge management capabilities, SMEs, mediation analysis, structural equation model

description: Since there has been a paucity of empirical research on the impact of knowledge risks on firm sustainability so far, this paper aims to contribute to the development of this strand by analysing the relationship between knowledge risks and firm sustainability, with knowledge management capabilities as a mediating variable. A structured questionnaire was validated and administered to a sample of 100 companies operating in several sectors.The hypotheses test was performed through a structural equation model, and the results were consistent with previous studies that found a negative effect of knowledge risks on firms’ sustainability performance. The hypothesised mediating effect of knowledge management capabilities was supported as well.
description: Economia Aziendale Online -, Vol 14, No 4 (2023): ISSUE 4/2023
Noise effects in the nonlinear thermoelectricity of a Josephson junction
Creators: name: Marchegiani, G.
name: Braggio, A.
name: Giazotto, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate the noise current in a thermally biased tunnel junction between two superconductors with different zero-temperature gaps. When the Josephson effect is suppressed, this structure can support a nonlinear thermoelectric effect due to the spontaneous breaking of electron-hole symmetry, as we recently theoretically predicted. We discuss the possibly relevant role played by the noise in the junction. While a moderate noise contribution assists the generation of the thermoelectric signal, further unveiling the spontaneous nature of the electron-hole symmetry breaking, a large noise contribution can induce a switching between the two stationary thermoelectric values, thus hardening the detection of the effect and its application. We demonstrate that the thermoelectric effect is robust to the presence of noise for a wide range of parameters and that the spurious fluctuations of the thermoelectric signal can be lowered by increasing the capacitance of the junction, for instance by expanding the junction's size. Our results pave the way to the future experimental observation of the thermoelectric effect in superconducting junctions, and to improved performance in quantum circuits designed for thermal management.
Transition from Baryon- to Meson-Dominated Freeze Out -- Early Decoupling around 30 A GeV?
Creators: name: Oeschler, H.
name: Cleymans, J.
name: Redlich, K.
name: Wheaton, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recently discovered sharp peak in the excitation function of the K+/pi+ ratio around 30 A GeV in relativistic heavy-ion collisions is discussed in the framework of the Statistical Model. In this model, the freeze-out of an ideal hadron gas changes from a situation where baryons dominate to one with mainly mesons. This transition occurs at a temperature T = 140 MeV and baryon chemical potential mu(B) = 410 MeV corresponding to an energy of sqrt(s) = 8.2 GeV. The calculated maximum in the K+/pi+ ratio is, however, much less pronounced than the one observed by the NA49 Collaboration. The smooth increase of the K-/pi- ratio with incident energy and the shape of the excitation functions of the Lambda/pi+, Xi-/pi+ and Omega/pi ratios all exhibiting maxima at different incident energies, is consistent with the presently available experimental data. The measured K+/pi+ ratio exceeds the calculated one just at the incident energy when the freeze-out condition is changing. We speculate that at this point freeze-out might occur in a modified way. We discuss a scenario of an early freeze-out which indeed increases K+/pi+ ratio while most other particle ratios remain essentially unchanged. Such an early freeze-out is supported by results from HBT studies.
description: 8 pages, 5 figures, SQM2006 conference, Los Angeles, March 2006
Evidence for overland dispersal in a flightless aquatic insect
Creators: name: Boersma, Kate
name: Lytle, David
Publisher: name: F1000Research
Year: 2015

description: Perennial desert streams are experiencing increasing rates of catastrophic failure due to anthropogenic water use and climate change. The ability of aquatic biota to survive periods of intermittency is determined in part by species-specific dispersal capacities, as dispersal may allow taxa to seek refuge from stream drying. Aquatic inhabitants of desert streams display a wide range of dispersal capacity, from fish that require perennial water to aquatic insects with a terrestrial adult stage. Giant water bugs, Abedus herberti, are intermediate dispersers between these extremes because they are flightless but breathe air, allowing them a limited capacity to travel over land before desiccating. Here I review the results of a laboratory study suggesting that A. herberti can use desiccation as a dispersal cue. Then, combining field and laboratory data, I present evidence both for and against the existence of overland dispersal in A. herberti and discuss the potential ecological and evolutionary consequences of dispersal tendency in fragmented systems.
FPGA: Fast Patch-Free Global Learning Framework for Fully End-to-End Hyperspectral Image Classification
Creators: name: Zheng, Zhuo
name: Zhong, Yanfei
name: Ma, Ailong
name: Zhang, Liangpei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Deep learning techniques have provided significant improvements in hyperspectral image (HSI) classification. The current deep learning based HSI classifiers follow a patch-based learning framework by dividing the image into overlapping patches. As such, these methods are local learning methods, which have a high computational cost. In this paper, a fast patch-free global learning (FPGA) framework is proposed for HSI classification. In FPGA, an encoder-decoder based FCN is utilized to consider the global spatial information by processing the whole image, which results in fast inference. However, it is difficult to directly utilize the encoder-decoder based FCN for HSI classification as it always fails to converge due to the insufficiently diverse gradients caused by the limited training samples. To solve the divergence problem and maintain the abilities of FCN of fast inference and global spatial information mining, a global stochastic stratified sampling strategy is first proposed by transforming all the training samples into a stochastic sequence of stratified samples. This strategy can obtain diverse gradients to guarantee the convergence of the FCN in the FPGA framework. For a better design of FCN architecture, FreeNet, which is a fully end-to-end network for HSI classification, is proposed to maximize the exploitation of the global spatial information and boost the performance via a spectral attention based encoder and a lightweight decoder. A lateral connection module is also designed to connect the encoder and decoder, fusing the spatial details in the encoder and the semantic features in the decoder. The experimental results obtained using three public benchmark datasets suggest that the FPGA framework is superior to the patch-based framework in both speed and accuracy for HSI classification. Code has been made available at: https://github.com/Z-Zheng/FreeNet.
description: 16 pages, 15 figures, IEEE Transactions on Geoscience and Remote Sensing, 2020
$N$-body Simulation of Planetesimal Formation Through Gravitational Instability of a Dust Layer
Creators: name: Michikoshi, Shugo
name: Inutsuka, Shu-ichiro
name: Kokubo, Eiichiro
name: Furuya, Izumi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We performed N-body simulations of a dust layer without a gas component and examined the formation process of planetesimals. We found that the formation process of planetesimals can be divided into three stages: the formation of non-axisymmetric wake-like structures, the creation of aggregates, and the collisional growth of the aggregates. Finally, a few large aggregates and many small aggregates are formed. The mass of the largest aggregate is larger than the mass predicted by the linear perturbation theory. We examined the dependence of system parameters on the planetesimal formation. We found that the mass of the largest aggregates increase as the size of the computational domain increases. However the ratio of the aggregate mass to the total mass $M_\mathrm{aggr}/M_\mathrm{total}$ is almost constant $0.8-0.9$. The mass of the largest aggregate increases with the optical depth and the Hill radius of particles.
description: 34 pages, 11 figures. Accepted for publication in ApJ