cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Entropy Dynamics of Phonon Quantum States Generated by Optical Excitation of a Two-Level System
Creators: name: Hahn, Thilo
name: Wigger, Daniel
name: Kuhn, Tilmann
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In quantum physics, two prototypical model systems stand out due to their wide range of applications. These are the two-level system (TLS) and the harmonic oscillator. The former is often an ideal model for confined charge or spin systems and the latter for lattice vibrations, i.e., phonons. Here, we couple these two systems, which leads to numerous fascinating physical phenomena. Practically, we consider different optical excitations and decay scenarios of a TLS, focusing on the generated dynamics of a single phonon mode that couples to the TLS. Special emphasis is placed on the entropy of the different parts of the system, predominantly the phonons. While, without any decay, the entire system is always in a pure state, resulting in a vanishing entropy, the complex interplay between the single parts results in non-vanishing respective entanglement entropies and non-trivial dynamics of them. Taking a decay of the TLS into account leads to a non-vanishing entropy of the full system and additional aspects in its dynamics. We demonstrate that all aspects of the entropy's behavior can be traced back to the purity of the states and are illustrated by phonon Wigner functions in phase space.
Barriers to Immediate Post-Partum Intra-Uterine Contraceptive Device Uptake among Mothers Delivering at Meru Hospital
Creators: name: Kirigia, Consolata
Publisher: name: figshare
Year: 2020
Subjects: subject: 111006 Midwifery
subject: FOS: Health sciences

description: Barriers to Immediate Post-Partum Intra-Uterine Contraceptive Device Uptake among Mothers Delivering at Meru Hospital
Cosmological DCBH formation sites hostile for their growth
Creators: name: Chon, Sunmyon
name: Hosokawa, Takashi
name: Omukai, Kazuyuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The direct collapse (DC) is a promising mechanism that provides massive seed black holes (BHs) with $\sim 10^{5}~M_{\odot}$ in the early universe. To study a long-term accretion growth of a DCBH thus formed, we perform cosmological radiation-hydrodynamics simulations, extending our previous work where we investigated its formation stage. With a high spatial resolution down below the Bondi radius, we show that the accretion rate onto the BH is far below the Eddington value. Such slow mass growth is partly because of the strong radiative feedback from the accreting BH. Moreover, we find that the BH has a large velocity of $\sim 100~{\rm km~s^{-1}}$ relative to the gas after it falls into the first galaxy, which substantially reduces the accretion rate. The latter effect stems from the fact that the DCBHs form in metal-free environments typically at $\sim 1~$kpc from the galaxy. The BH accelerates as it approaches the galactic center due to the gravity. The relative velocity never damps after that, and the BH does not settle down to the galactic center but continues to wander around it. An analytic estimate predicts that the DCBH formation within $\sim 100$~pc around the galactic center is necessary to decelerate the BH with dynamical friction before $z=7$. Since metal enrichment with $Z \sim 10^{-5} - 10^{-3}~Z_\odot$ is expected in such a case, the formation of DCBHs in the metal-poor environments is preferable for the subsequent rapid growth.
description: 13 pages, 8 figures, submitted to MNRAS
Ulrich bundles on ruled surfaces
Creators: name: Aprodu, Marian
name: Costa, Laura
name: Miro-Roig, Rosa Maria
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this short note, we study the existence problem for Ulrich bundles on ruled surfaces, focusing our attention on the smallest possible rank. We show that existence of Ulrich line bundles occurs if and only if the coefficient $α$ of the minimal section in the numerical class of the polarization equals one. For other polarizations, we prove the existence of rank two Ulrich bundles.
On the Dynamics of Generalized Coherent States. I. Exact and Stable Evolution
Creators: name: Nikolov, B. A.
name: Trifonov, D. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The exact and stable evolutions of generalized coherent states (GCS) for quantum systems are considered by making use of the time-dependent integrals of motion method and of the Klauder approach to the relationship between quantum and classical mechanics. It is shown that one can construct for any quantum system overcomplete family of states (OFS), related to the unitary representations of the Lie group G by means of integral of motion generators, and the possibility of using this group as a dynamical symmetry group is pointed out. The relation of the OFS with quantum measurement theory is also established.
description: Latex, 10 pages. Electronic file of a 1981 Communication of JINR. Several short (clarifying) footnotes added. For Part II see quant-ph/0407261
Detecting User Engagement in Everyday Conversations
Creators: name: Yu, Chen
name: Aoki, Paul M.
name: Woodruff, Allison
Publisher: name: arXiv
Year: 2004
Subjects: subject: Sound (cs.SD)
subject: Computation and Language (cs.CL)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: I.5.4; I.2.7; H.5.2; H.4.3

description: This paper presents a novel application of speech emotion recognition: estimation of the level of conversational engagement between users of a voice communication system. We begin by using machine learning techniques, such as the support vector machine (SVM), to classify users' emotions as expressed in individual utterances. However, this alone fails to model the temporal and interactive aspects of conversational engagement. We therefore propose the use of a multilevel structure based on coupled hidden Markov models (HMM) to estimate engagement levels in continuous natural speech. The first level is comprised of SVM-based classifiers that recognize emotional states, which could be (e.g.) discrete emotion types or arousal/valence levels. A high-level HMM then uses these emotional states as input, estimating users' engagement in conversation by decoding the internal states of the HMM. We report experimental results obtained by applying our algorithms to the LDC Emotional Prosody and CallFriend speech corpora.
description: 4 pages (A4), 1 figure (EPS)
Interaction of Impurity Atoms in Bose-Einstein-Condensates
Creators: name: Klein, Alexander
name: Fleischhauer, Michael
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The interaction of two spatially separated impurity atoms through phonon exchange in a Bose-Einstein condensate is studied within a Bogoliubov approach. The impurity atoms are held by deep and narrow trap potentials and experience level shifts which consist of a mean-field part and vacuum contributions from the Bogoliubov-phonons. In addition there is a conditional energy shift resulting from the exchange of phonons between the impurity atoms.
description: 8 pages, 6 figures
Derived Functors and Hilbert Polynomials
Creators: name: Theodorescu, Emanoil
Publisher: name: arXiv
Year: 2004
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: Let $R$ be a commutative Noetherian ring, $I$ an ideal, $M$ and $N$ finitely generated $R$-modules. Assume $V(I)\cap Supp(M)\cap Supp(N)$ consists of finitely many maximal ideals and let $ł(\e^i(N/I^nN,M))$ denote the length of $\e^i(N/I^nN,M)$. It is shown that $ł(\e^i(N/I^nN,M))$ agrees with a polynomial in $n$ for $n>>0$, and an upper bound for its degree is given. On the other hand, a simple example shows that some special assumption such as the support condition above is necessary in order to conclude that polynomial growth holds.
Density-scaling exponents and virial potential-energy correlation coefficients for the (2n,n) Lennard-Jones system
Creators: name: Friisberg, Ida M.
name: Costigliola, Lorenzo
name: Dyre, Jeppe C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: This paper investigates the relation between the density-scaling exponent $γ$ and the virial potential-energy correlation coefficient $R$ at several thermodynamic state points in three dimensions for the generalized $(2n,n)$ Lennard-Jones (LJ) system for $n=4, 9, 12, 18$, as well as for the standard $n=6$ LJ system in two, three, and four dimensions. The state points studied include many low-density states at which the virial potential-energy correlations are not strong. For these state points we find the roughly linear relation $γ\cong 3nR/d$ in $d$ dimensions. This result is discussed in light of the approximate "extended inverse power law" description of generalized LJ potentials [N. P. Bailey et al., J. Chem. Phys. 129, 184508 (2008)]. In the plot of $γ$ versus $R$ there is in all cases a transition around $R\approx 0.9$, above which $γ$ starts to decrease as $R$ approaches unity. This is consistent with the fact that $γ\rightarrow 2n/d$ for $R\rightarrow 1$, a limit that is approached at high densities and/or temperatures at which the repulsive $r^{-2n}$ term dominates the physics.
On the Dynamics of Generalized Coherent States. II. Classical Equations of Motions
Creators: name: Nikolov, B. A.
name: Trifonov, D. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Using the Klauder approach the stable evolution of generalized coherent states (GCS) for some groups (SU(2), SU(1,1) and SU(N)) is considered and it is shown that one and the same classical solution z(t) can correctly characterize the quantum evolution of many different (in general nonequivalent) systems. As examples some concrete systems are treated in greater detail: it is obtained that the nonstationary systems of the singular oscillator, of the particle motion in a magnetic field, and of the oscillator with friction all have stable SU(1,1) GCS whose quantum evolution is determined by one and the same classical function z(t). The physical properties of the constructed SU(1,1) GCS are discussed and it is shown particularly that in the case of discrete series D_k^+ they are those states for which the quantum mean values coincide with the statistical ones for an oscillator in a thermostat.
description: Latex, 13 pages. Electronic file of a 1981 Communication of JINR. Several short (clarifying) footnotes added. For Part I see quant-ph/0407260
title: Trakiya - Redicovering. Generating. Integrating : strategy for the urban development of a prefabricated housing neighbourhood in Plovdiv, Bulgaria
Creators: name: Balezdrova-Krasteva, Galina
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Städtebau
subject: Plattenbau
subject: Bulgarien
subject: Urban planning
subject: Concrete panel buildings
subject: Bulgaria

description: Die Großwohnsiedlung Trakiya ist der drittgrößte sozialistische Projekt Bulgariens. Sie befindet sich in der südlichen, 6000 Jahre alten Stadt - Plovdiv. Entstanden zwischen den Jahren 1971 und 1983, ist Trakiya das jungste Quartier Plovdivs. Zunächst wurde der Ort nach dem sozialistischen Prinzip für Homogenisierung und Gleichheit mit Menschen verschiedenen Ursprungs besiedelt, diese stammten sowohl vom Zentrum der Stadt, als auch von den umliegenden Dörfer. Circa 40 Jahre später, ist Trakiya einer der attraktivsten Quartiere für junge Famillien geworden und erwartet ihre vierte Generation von Bewohnern. In diesem Zeitraum und vor allem nach der Wende 1989 wurde das Quartier transformiert und an den Bedürfnisse und den Wünschen der Einwohner, die im Laufe der Zeit auch Eigentümer der Wohnungen geworden sind, fast unkontrolliert geändert. Eine komplexe Analyse, die die sozialanthropologischen und architektonischen Aspekte des Quartiers untersucht, bezweckt das Hervorheben eines Problemes, das die positive Weiterentwicklung des Quartiers die Probe stellt. Eine top-down städtebauliche Intervention wird geplant, dessen Ziel es ist bottop-up Aktivitäten zu stimulieren.
description: The housing estate of Trakiya is the third biggest socialistic Project of Bulgaria. It is located in the south part of the 6000 years old city of Plovdiv. Build between 1971 and 1983, Trakiya is the youngest district of Plovdiv. At first the place was populated according to the socialistic principle for homogeneity and equality with inhabitants from different origin. Those originated as well from the centre of the city as from the surrounding villages. About 40 years later Trakiya has become one of the most appealing districts to young families and awaits its 4th generation of inhabitants. During this time period and especially after Die Wende in 1989 the district transformed and changed almost uncontrolled according to the needs and wishes of its inhabitants that meanwhile became owners of the apartments. A complex analysis that aims to examine the social anthropological and architectural aspects of the district purposes to highlight a problem that disturbs the positive further development of the district. A top-down urban intervention is planned aiming to stimulate bottom-up activities.
Single photo-electron trapping, storage, and detection in a one-electron quantum dot
Creators: name: Rao, Deepak Sethu
name: Szkopek, Thomas
name: Robinson, Hans Daniel
name: Yablonovitch, Eli
name: Jiang, Hong-Wen
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There has been considerable progress in electro-statically emptying, and re-filling, quantum dots with individual electrons. Typically the quantum dot is defined by electrostatic gates on a GaAs/AlGaAs modulation doped heterostructure. We report the filling of such a quantum dot by a single photo-electron, originating from an individual photon. The electrostatic dot can be emptied and reset in a controlled fashion before the arrival of each photon. The trapped photo-electron is detected by a point contact transistor integrated adjacent to the electrostatic potential trap. Each stored photo-electron causes a persistent negative step in the transistor channel current. Such a controllable, benign, single photo-electron detector could allow for information transfer between flying photon qubits and stored electron qubits.
description: 4 Pages, 5 Figures
The Spanish electoral cycle of 2019: a tale of two countries
Creators: name: Rodon, Toni
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: In 2019 alone, Spanish citizens went to the polls at least four times – two general elections, European elections, local elections and, for some, regional elections. Moreover, in the 2016–19 legislature, the country witnessed a successful vote of no confidence that replaced a Conservative prime minister with a Socialist one; experienced an important constitutional crisis over the 2017 referendum on Catalan independence; observed the emergence for the first time of a viable far-right party; and ended with the first coalition government in the modern democratic history. The November 2019 election, the last in this long electoral cycle, left a fragmented and polarized political landscape and a left-wing cabinet – PSOE and Podemos – that does not have a majority in the chamber. This article presents the background, the results of the different elections and discusses how and why Spanish politics experienced a radical transformation likely to have an impact in the next years.
Communicating "forest" : co-managing crises and opportunities with Northern Secwepemc First Nations and the Province of British Columbia
Creators: name: Greskiw, Garth East
Publisher: name: University of British Columbia
Year: 2010

description: The following research inquires about the communication challenges for co-management of natural resources in traditional territories of Secwepemc First Nations. The results will be of interest to First Nations, lands and resource planners of British Columbia and others who are interested in developing acceptable strategies for co-management of indigenous lands with ’post-colonial’ governments. The purpose of the study is to find out how co-management can occur so that learning and continual adaptation to new knowledge is planned. Communication by speaking and listening and by sharing stories continues to be important for maintaining culture--but communication by reading and writing is the dominant method currently used by management authorities. Communication crises occur when traditional ecological knowledge is required to fit within a rigid technology of literacy (Nadasdy 1999). There is little presently known about how the Province of British Columbia and First Nations can communicate so that acceptable co-management of forests can be achieved. Nevertheless, co-management is required as the method for resolving the Canadian constitutional conflict between First Nations’ title and rights and the natural resources jurisdiction of the Province. A hypothesis is tested that the Northern Secwepemc First Nations are leading transformation initiatives toward sustainable management in their territories and that shared knowledge emerges from new growth opportunities in crisis situations. Crises in forest management can create opportunities for cross-scale institutional improvement of co-management if First Nations and Provincial decision-making is shared in learning organizations. The project used the case study survey method for inquiry. Community contact persons provided direction in finding acceptable terms of reference for the project and the cases for study. Interviews were based on questions derived from the current provincial forest-planning framework, the communities’ vision for co-management and from the research of common property resource management by Ostrom (1990) and Pinkerton (1992). The analysis used in this research was tailored to the grounded theory method for data analysis (Glaser 1998). Research findings indicated that there is potential for transformation of forest management in Northern Secwepemc territories in times of crises, however certain conditions, such as adequate staffing, funding and training, must first exist at the site level of management in order to make the best use of emergent opportunities for collaboration. Systemic and democratic conversation among First Nations and provincial planners in British Columbia must be encouraged. This should be accomplished in institutional frameworks that are well supported for local learning organizations to inform management continuously and adaptively, across scales from the site level to the provincial level.
Earth-skimming UHE Tau Neutrinos at the Fluorescence Detector of Pierre Auger Observatory
Creators: name: Aramo, C.
name: Insolia, A.
name: Leonardi, A.
name: Miele, G.
name: Perrone, L.
name: Pisanti, O.
name: Semikoz, D. V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ultra high energy neutrinos are produced by the interaction of hadronic cosmic rays with the cosmic radiation background. More exotic scenarios like topological defects or new hadrons predict even larger fluxes. In particular, Earth-skimming tau neutrinos could be detected by the Fluorescence Detector (FD) of Pierre Auger Observatory. A detailed evaluation of the expected number of events has been performed for a wide class of neutrino flux models. An updated computation of the neutrino-nucleon cross section and of the tau energy losses has been carried out. For the most optimistic theoretical models, about one Earth-skimming neutrino event is expected in several years at FD.
description: 26 pages, 13 figures, version accepted for publication on Astroparticle Physics
NGC 3894: a young radio galaxy seen by Fermi-LAT
Creators: name: Principe, G.
name: Migliori, G.
name: Johnson, T. J.
name: D'Ammando, F.
name: Giroletti, M.
name: Orienti, M.
name: Stanghellini, C.
name: Taylor, G. B.
name: Torresi, E.
name: Cheung, C. C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. According to radiative models, radio galaxies may produce gamma-ray emission from the first stages of their evolution. However, very few such galaxies have been detected by the Fermi Large Area Telescope (LAT) so far. Aims. NGC 3894 is a nearby (z = 0.0108) object that belongs to the class of compact symmetric objects (CSOs, i.e., the most compact and youngest radio galaxies), which is associated with a gamma-ray counterpart in the Fourth Fermi-LAT source catalog. Here we present a study of the source in the gamma-ray and radio bands aimed at investigating its high-energy emission and assess its young nature. Methods. We analyzed 10.8 years of Fermi-LAT data between 100 MeV and 300 GeV and determined the spectral and variability characteristics of the source. Multi-epoch very long baseline array (VLBA) observations between 5 and 15 GHz over a period of 35 years were used to study the radio morphology of NGC 3894 and its evolution. Results. NGC 3894 is detected in gamma-rays with a significance >9 sigma over the full period, and no significant variability has been observed in the gamma-ray flux on a yearly time-scale. The spectrum is modeled with a flat power law ($Γ$ = 2.0$\pm$0.1) and a flux on the order of 2.2 $\times$ 10$^{-9}$ ph cm$^{-2}$ s$^{-1}$. For the first time, the VLBA data allow us to constrain with high precision the apparent velocity of the jet and counter-jet side to be $β_{\mathrm{app,NW}}$ = 0.132$\pm$0.004 and $β_{\mathrm{app,SE}}$ = 0.065$\pm$0.003, respectively. Conclusions. Fermi-LAT and VLBA results favor the youth scenario for the inner structure of this object, with an estimated dynamical age of 59$\pm$5 years. The estimated range of viewing angle (10° < $θ$ < 21°) does not exclude a possible jet-like origin of the gamma-ray emission.
description: Accepted by A&A on February 28, 2020. 8 pages, 7 figures
Ulrich line bundles on Enriques surfaces with a polarization of degree four
Creators: name: Aprodu, Marian
name: Kim, Yeongrak
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this paper, we prove the existence of an Enriques surface with a polarization of degree four with an Ulrich bundle of rank one. As a consequence, we prove that general polarized Enriques surfaces of degree four, with the same numerical polarization class, carry Ulrich line bundles.
description: to appear in a volume of Ann. Univ. Ferrara dedicated to the memory of Alexandru Lascu
Fabrication and Electric Field Dependent Transport Measurements of Mesoscopic Graphite Devices
Creators: name: Zhang, Yuanbo
name: Small, Joshua P.
name: Pontius, William V.
name: Kim, Philip
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have developed a unique micromechanical method to extract extremely thin graphite samples. Graphite crystallites with thicknesses ranging from 10 - 100 nm and lateral size $\sim$ 2 $μ$m are extracted from bulk. Mesoscopic graphite devices are fabricated from these samples for electric field dependent conductance measurements. Strong conductance modulation as a function of gate voltage is observed in the thinner crystallite devices. The temperature dependent resistivity measurements show more boundary scattering contribution in the thinner graphite samples.
description: 3 pages, 3 figures included, submitted to Appl. Phys. Lett
Superfluid spin transport in magnetically ordered solids
Creators: name: Sonin, E. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The paper reviews the theory of the long-distance spin superfluid transport in solid ferro- and antiferromagnets based on the analysis of the topology, the Landau criterion, and phase slips. Experiments reporting evidence of the existence of spin superfluidity are also overviewed.
description: Review article, 29 pages, 10 figures
title: Business fruits hotel : Entwurf eines Businesshotels im Mostviertel
Creators: name: Fuchshuber, Julia Valentina
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Hotelbau
subject: Architektur
subject: Hotel
subject: Architektur

description: Business Fruits Hotel Das Mostviertel ist für seine beeindruckende Hügellandschaft mit Obstbäumen, seine regionalen Spezialitäten und die traditionellen Vierkanthöfe bekannt. Besonders im Frühling zur Birn- und Apfelbaumblüte ist die Region ein beliebtes Ausflugsziel, vor allem für Radfahrer und Radfahrerinnen. Durch die Nähe zu Linz, Steyr, Amstetten und Perg und die Ansiedelung von einigen internationalen Großbetrieben in St.Valentin kommt es zu steigendenden Nächtigungszahlen von Businesstouristen. Diese schätzen die Ruhe und die kostengünstigere Übernachtungsmöglichkeit des im Nordwesten des Mostviertels gelegenen Standorts, im Vergleich zu Linz und Steyr. Das 'Business Fruits Hotel' geht besonders auf die Bedürfnisse der Businessreisenden ein und bietet einerseits Möglichkeiten für ungestörtes Arbeiten und Seminarveranstaltungen, andererseits auch ein Spa und einen Fitnessbereich als Orte der Ruhe und Entspannung. Das Hotel verfügt über dreißig Zimmer, sowie zwei Business Suiten, eine Honeymoon Suite und eine längerfristig mietbare Business Wohnung. Alle Zimmer gewähren einen beeindruckenden Ausblick in die Gegend, welcher auch zentraler Teil des Konzepts ist. Im Foyer spiegelt sich die Landschaft zudem in einer Obstbaumallée wider, wodurch sich der Gast auf das Mostviertel einstim- men und jederzeit Äpfel und Birnen aus der Region verkosten kann.
description: Business Fruits Hotel The Mostviertel is known for its impressive hill land with fruit trees, its regional specialities and the traditional four-sided farmyard named 'Vierkanthof'. Especially in spring, when the apple and pear trees bloom, the region is a popular place of excursions, particulary for cyclists. Due to the proximity to Linz, Steyr, Amstet- ten and Perg and because of the settlement of big international corporations in St.Valentin, a rising number of overnight stays of business guests is recognizable. They appreciate the calm and more cost- ef cient accomodation of the location in the northwest of the Mostviertel, compared to Linz and Steyr. The 'Business Fruits Hotel' adresses to the needs of business travellers and offers possibilities for undisturbed working, seminars and workshops. On the other hand it provides peaceful places for relaxation as the spa and the tness areaW. The hotel has thirty rooms, as well as two business suites, one honeymoon suite and one rentable business at. All rooms offer an impressive view of the region, which is also a central part of the concept. The design of the lobby including apple and pear trees re ects the special charme of the unique Mostviertel. Business travellers can taste the fruits of the region at any time.
11D supergravity at ${\cal O}(l^3)$
Creators: name: Tsimpis, Dimitrios
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute certain spinorial cohomology groups controlling possible supersymmetric deformations of eleven-dimensional supergravity up to order $l^3$ in the Planck length. At ${\cal O}(l)$ and ${\cal O}(l^2)$ the spinorial cohomology groups are trivial and therefore the theory cannot be deformed supersymmetrically. At ${\cal O}(l^3)$ the corresponding spinorial cohomology group is generated by a nontrivial element. On an eleven-dimensional manifold $M$ such that $p_1(M)\neq 0$, this element corresponds to a supersymmetric deformation of the theory, which can only be redefined away at the cost of shifting the quantization condition of the four-form field strength.
description: 10 pages, 1 figure. v2: references added
End-to-End Fast Training of Communication Links Without a Channel Model via Online Meta-Learning
Creators: name: Park, Sangwoo
name: Simeone, Osvaldo
name: Kang, Joonhyuk
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: When a channel model is not available, the end-to-end training of encoder and decoder on a fading noisy channel generally requires the repeated use of the channel and of a feedback link. An important limitation of the approach is that training should be generally carried out from scratch for each new channel. To cope with this problem, prior works considered joint training over multiple channels with the aim of finding a single pair of encoder and decoder that works well on a class of channels. In this paper, we propose to obviate the limitations of joint training via meta-learning. The proposed approach is based on a meta-training phase in which the online gradient-based meta-learning of the decoder is coupled with the joint training of the encoder via the transmission of pilots and the use of a feedback link. Accounting for channel variations during the meta-training phase, this work demonstrates the advantages of meta-learning in terms of number of pilots as compared to conventional methods when the feedback link is only available for meta-training and not at run time.
Bivariate Hilbert Functions for the Torsion Functor
Creators: name: Theodorescu, Emanoil
Publisher: name: arXiv
Year: 2004
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13D40

description: Let $(R,P)$ be a commutative, local Noetherian ring, $I$, $J$ ideals, $M$ and $N$ finitely generated $R$-modules. Suppose $J + ann_R M + ann_R N$ is $P$-primary. The main result of this paper is Theorem 6, which gives necessary and sufficient conditions for the length of $\t_i(M/I^nM,N/J^mN)$, to agree with a polynomial, for $m$, $n \gg 0$. As a corollary, it is shown that the length of $\t_i(M/I^nM,N/I^nN))$ always agrees with a polynomial in $n$, for $n \gg 0$, provided $I + ann_R M + ann_R N$ is $P$-primary.
The clustering of gamma-ray bursts in the Hercules-Corona Borealis Great Wall: the largest structure in the Universe?
Creators: name: Horvath, I.
name: Szécsi, D.
name: Hakkila, J.
name: Szabó, Á.
name: Racz, I. I.
name: Tóth, L. V.
name: Pinter, S.
name: Bagoly, Z.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Hercules-Corona Borealis Great Wall is a statistically significant clustering of gamma-ray bursts around redshift 2. Motivated by recent theoretical results indicating that a maximal Universal structure size may indeed coincide with its estimated size (2-3Gpc), we reexamine the question of this Great Wall's existence from both observational and theoretical perspectives. Our statistical analyses confirm the clustering's presence in the most reliable data set currently available, and we present a video showing what this data set looks like in~3D. Cosmological explanations (i.e. having to do with the distribution of gravitating matter) and astrophysical explanations (i.e. having to do with the rate of star formation over cosmic time and space) regarding the origin of such a structure are presented and briefly discussed and the role of observational bias is also discussed at length. This, together with the scientific importance of using gamma-ray bursts as unique cosmological probes, emphasises the need for future missions such as the THESEUS satellite which will provide us with unprecedentedly homogeneous data of gamma-ray bursts with measured redshifts. We conclude from all this that the Hercules-Corona Borealis Great Wall may indeed be the largest structure in the Universe - but to be able to decide conclusively whether it actually exists, we need THESEUS.
description: Accepted for publication in MNRAS. 12 pages, 3 figures, 3 tables
ISOCAM observations in the Lockman Hole - II The 14.3 micron deep survey: data reduction, catalogue and source counts
Creators: name: Rodighiero, G.
name: Lari, C.
name: Fadda, D.
name: Franceschini, A.
name: Elbaz, D.
name: Cesarsky, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new analysis of the ISOCAM 14.3 micron deep survey in a 20x20 square arcmins area in the Lockman Hole. This survey is intermediate between the ultra-deep surveys and the shallow surveys in the ELAIS fields. The data have been analyzed with the method presented by Lari et al. (2001). We have produced a catalogue of 283 sources detected above the 5-sigma threshold, with fluxes in the interval 0.1-8 mJy. The catalogue is 90% complete at 1 mJy. The positional accuracy, estimated from the cross-correlation of infrared and optical sources, is around 1.5 arcsec. The search for the optical counterparts of the sources in the survey is performed on a medium-deep r' band optical image (5-sigma depth of r'=25), making use of the radio detections when available. The photometry has been checked through simulations and by comparing the data with those presented in a shallower and more extended ISOCAM survey in the Lockman Hole, that we have presented in a companion paper. Only 15% of the 14.3 micron sources do not have an optical counterpart down to r'=25 mag. We use the 6.7/14.3 micron colour as a star/galaxy separator, together with a visual inspection of the optical image and an analysis of the observed Spectral Energy Distribution of the ISOCAM sources. The stars in the sample turn out to be only 6% of the sample. We discuss the 14.3 micron counts of extragalactic sources, combining our catalogue with that obtained from the shallower ISOCAM survey. The data in the two surveys are consistent, and our results fully support the claims in previous works for the existence of an evolving population of infrared galaxies, confirming the evident departure from non-evolutionary model predictions.
description: Version accepted by Astronomy and Astrophysics. Images have been heavily degraded to fill the archive size. A full resolution version can be downloaded at the following link http://dipastro.pd.astro.it/giulia/Deep/1252.ps.gz
Electric Field Modulation of Galvanomagnetic Properties of Mesoscopic Graphite
Creators: name: Zhang, Yuanbo
name: Small, Joshua P.
name: Amori, Michael E. S.
name: Kim, Philip
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electric field effect devices based on mesoscopic graphite are fabricated for galvanomagnetic measurements. Strong modulation of magneto-resistance and Hall resistance as a function of gate voltage is observed as sample thickness approaches the screening length. Electric field dependent Landau level formation is detected from Shubnikov de Haas oscillations in magneto-resistance. The effective mass of electron and hole carriers has been measured from the temperature dependant behavior of these oscillations.
description: 4 pages, 4 figures included, submitted to Phys. Rev. Lett
K-band Properties of Well-Sampled Groups of Galaxies
Creators: name: Ramella, M.
name: Boschin, W.
name: Geller, M. J.
name: Mahdavi, A.
name: Rines, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use a sample of 55 groups and 6 clusters of galaxies ranging in mass from 7 x 10^11 Msun to 1.5 x 10^15 Msun to examine the correlation of the Ks-band luminosity with mass discovered by Lin et al. (2003). We use the 2MASS catalog and published redshifts to construct complete magnitude limited redshift surveys of the groups. From these surveys we explore the IR photometric properties of groups members including their IR color distribution and luminosity function. Although we find no significant difference between the group Ks luminosity function and the general field, there is a difference between the color distribution of luminous group members and their counterparts (generally background) in the field. There is a significant population of luminous galaxies with H-Ks > 0.35 which are rarely, if ever, members of the groups in our sample. The most luminous galaxies which populate the groups have a very narrow range of IR color. Over the entire mass range covered by our sample, the Ks luminosity increases with mass as L ~ M^(0.64 +/- 0.06) implying that the mass-to-light ratio in the Ks-band increases with mass. The agreement between this result and earlier investigations of essentially non-overlapping sets of systems shows that this window in galaxy formation and evolution is insensitive to the selection of the systems and to the details of the mass and luminosity computations.
description: 38 pages, 9 figures, 2 tables. Accepted for publication on Astronomical Journal
الامن الغذائى العربى والتغيرات الاقتصادية العالمية
Creators: name: Soliman, Ibrahim
name: Soliman, Ibrahim
Publisher: name: Unknown
Year: 2000
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: International Development
subject: Public Economics
subject: Food Security of Arab Countries and International Economic Changes
subject: Food Security
subject: Arab Countries

description: 8th Conference of Agricultural Economists, "Agriculture for Arab and the challenges of the twenty-first century", the Egyptian Society of Agricultural Economics 27-28 September, 2000
Towards Resolution of Hierarchy Problems in a Cosmological Context
Creators: name: Yoshimura, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A cosmological scenario is proposed, which simultaneously solves the mass hierarchy and the small dark energy problem. In the present scenario an effective gravity mass scale (inverse of the Newton's constant) increases during the inflationary period. The small cosmological constant or the dark energy density in the present universe is dynamically realized by introducing two, approximately O(2) symmetric dilatons, taking the fundamental mass scale at TeV.
description: 12 pages, no figure
Survival estimates for the invasive American bullfrog
Creators: name: Howell, Paige E.
name: Muths, Erin
name: Sigafus, Brent H.
name: Hossack, Blake R.
Publisher: name: Brill Online
Year: 2020
Subjects: subject: 60299 Ecology not elsewhere classified
subject: FOS: Biological sciences

description: American bullfrogs (Lithobates catesbeianus) are significant invaders in many places and can negatively impact native species. Despite their impact and wide distribution, little is known about their demography. We used five years of capture mark-recapture data to estimate annual apparent survival of post-metamorphic bullfrogs in a population on the Buenos Aires National Wildlife Refuge in their invaded range in Arizona, U.S.A. This population is a potential source of colonists into breeding ponds used by the federally threatened Chiricahua leopard frog (L. chiricahuensis). Results from robust-design Cormack-Jolly-Seber models suggested that survival of bullfrogs was influenced by sex and precipitation but not body condition. Survival was higher for females (mean = 0.37; 95% CI = 0.15, 0.72) than males (mean = 0.17; 95% CI = 0.02, 0.49), and declined with reduced annual precipitation (mean = ‒0.36, 95% CI = ‒2.09, 0.84). These survival estimates can be incorporated into models of population dynamics and to help predict spread of bullfrogs.
title: A legacy system migration and software evolution
Creators: name: Fürnweger, Andreas
Publisher: name: TU Wien
Year: 2017
Subjects: subject: legacy system
subject: maintenance
subject: software migration

description: Software ages. Maintenance costs tend to increase, and modifications to an application make future adaptions more difficult. As the surrounding software components are updated and modernized, static software becomes even more outdated relative to them. As soon as a system notably resists modification and evolution, it becomes legacy software and the stakeholders, such as architects and managers, have to decide whether to preserve or redesign the system. The main research questions are: What software evolution approaches are feasible and how to evaluate their cost and risk criteria? How do these criteria affect an actual migration based on a large, real-world software package? The chosen evaluation methods are: Research software evolution and related topics to identify different evolution approaches, and create a list of software evolution criteria for them. Apply those criteria to a real-world application to find an appropriate evolution approach; break it down to milestones; implement and evaluate the success of the implementation. The results are: The evolution can be preservation or migration driven; many offsetting costs/benefits and risk/reward profiles must be considered. As for real-world instances of migrations, there exist several tools to ease migrations and enable cross-platform application development. A code analysis is a useful way to quantify the success of the implementation.
Modeling of many-body interactions between elastic spheres through symmetry functions
Creators: name: Boattini, Emanuele
name: Bezem, Nina
name: Punnathanam, Sudeep N.
name: Smallenburg, Frank
name: Filion, Laura
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Simple models for spherical particles with a soft shell have been shown to self-assemble into numerous crystal phases and even quasicrystals. However, most of these models rely on a simple pairwise interaction, which is usually a valid approximation only in the limit of small deformations, i.e. low densities. In this work, we consider a many-body yet simple model for the evaluation of the elastic energy associated with the deformation of a spherical shell. The resulting energy evaluation, however, is relatively expensive for direct use in simulations. We significantly reduce the associated numerical cost by fitting the potential using a set of symmetry functions. We propose a method for selecting a suitable set of symmetry functions that capture the most relevant features of the particle environment in a systematic manner. The fitted interaction potential is then used in Monte Carlo simulations to draw the phase diagram of the system in two dimensions. The system is found to form both a fluid and a hexagonal crystal phase.
description: 10 pages, 9 figures
التقييم الاقتصادى للاثار المترتبة على جائحة أنفلونزا الخنازير
Creators: name: Soliman, Ibrahim
name: Soliman, Ibrahim
Publisher: name: Unknown
Year: 2010
Subjects: subject: Farm Management
subject: Livestock Production/Industries
subject: Public Economics
subject: Economic assessment of the effects of the swine flu pandemic
subject: swine flu

description: Journal of contemporary Egypt, number 497, Year 100, Jan, 2010, published by the Egyptian Society of political economy, statistics and legislation Cairo Egypt
The Level of Burden and Coping Strategies among the Caregivers of Older Adults at Selected Areas, Puducherry
Creators: name: R, Vijayakumar
name: Baby Rathinasabapathy
name: Chitra, Felicia
name: Manjubala Dash
Publisher: name: figshare
Year: 2020
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: Introduction: Today aging is a concern worldwide. Care givers provide support to the old age people, but they face lot of burden while caring for the old age peoples. The objectives of the study were to assess the level of burden & coping strategies among the caregivers of older adults. Methods: A descriptive survey research design of 200 care givers of older adults in the age groups of 30-50 years was selected at Puducherry. The data were collected by using standardized Zarit burden scale and coping strategy inventory. The data were analyzed based on frequency, percentage distribution, mean, and standard deviation, Correlation ‘r’ and chi square test. Results: Out of 200 care givers of older adults, majority 47% had moderate level of burden, 45.5% had mild and 7.5% of care givers of older adults had severe burden. 58.5% had moderate coping strategies and 41.5% had inadequate coping strategies. The level of burden and coping strategies indicate positive correlations and r value is (0.746) which was highly significant at the level of p value <0.000. The association of the levels of burden of socio demographic variables as gender, siblings, type of family, occupation, and income are found to be statistically significant at the level of P value < 0.05. The association of coping strategies levels of demographic variables as marital status, number of siblings and type of family are statistically significant at the level of P<0.05.and occupation and income are highly significant, at the level of P<0.001. Conclusions: The study concluded the majority of care givers are facing burden while providing care to the older adults. Care givers use spiritual aspect of the coping strategies Interventional strategies may be planned to overcome the burden. Community mental health nursing can take up the role to overcome these problems by identifying the high risk population and providing care.