cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Short GRBs and dark matter seeding in neutron stars
Creators: name: Perez-Garcia, M. Angeles
name: Daigne, F.
name: Silk, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a mechanism based on internal self-annihilation of dark matter accreted from the galactic halo in the inner regions of neutron stars that may trigger the full or partial conversion into a quark star. We explain how this effect may induce a gamma ray burst that could be classified as short, according to the usual definition based on time duration of the prompt gamma-ray emission. This mechanism differs in many aspects from the most discussed scenario associating short gamma-ray bursts with compact object binary mergers. We list possible observational signatures that should help to distinguish between these two possible classes of progenitors.
description: 14 pages, 4 figures, accepted for publication in ApJ
«Εισαγωγή στη Μηχανική Μάθηση και στην Αναλυτική Δεδομένων»
Creators: name: Georgiou, Harris
Publisher: name: Zenodo
Year: 2023
Subjects: machine learning
data analytics
artificial intelligence

description: «Εισαγωγή στη Μηχανική Μάθηση και στην Αναλυτική Δεδομένων» Περιεχόμενα: Βασικές έννοιες Τεχνητής Νοημοσύνης, Μηχανικής Μάθησης και Αναλυτικής Δεδομένων / συλλογή, προεπεξεργασία και ανακατασκευή δεδομένων / σχεδίαση ροής (pipeline) / επιλογή χαρακτηριστικών (features) / εκπαίδευση μοντέλων με επίβλεψη (classification, regression) και χωρίς επίβλεψη (clustering, associations) / απεικόνιση δεδομένων (visual analytics). Επίπεδο γνώσεων (από): Μαθητές Γυμνασίου – Λυκείου Προαπαιτούμενα: Στοιχειώδεις γνώσεις Μαθηματικών
Formation of magnetic nanocolumns during vapor phase deposition of a metal-polymer nanocomposite: experiments and kinetic Monte Carlo simulations
Creators: name: Rosenthal, L.
name: Greve, H.
name: Zaporojtchenko, V.
name: Strunskus, T.
name: Faupel, F.
name: Bonitz, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Metal-polymer nanocomposites have been investigated extensively during the last years due to their interesting functional applications. They are often produced by vapor phase deposition which generally leads to the self-organized formation of spherical metallic nanoparticles in the organic matrix, while nanocolumns are only obtained under very specific conditions. Experiments\cite{Grev+06} have shown that co-evaporation of the metallic and organic components in a simple single-step process can give rise to the formation of ultrahigh-density Fe-Ni-Co nanocolumnar structures embedded in a fluoropolymer matrix. Here we present a kinetic Monte Carlo approach which is based on an new model involving the depression of the melting point on the nanoscale and a critical nanoparticle size required for solidification. In addition we present new experimental results down to a deposition temperature of \cel{-70} and also report the magnetic properties. The simulations provide a detailed understanding of the transition from spherical cluster growth to formation of elongated structures and are in quantitative agreement with the experiments.
title: gezeigt. Hermann Maue • Hans Sachs ein al ter Hut?« Copyprint von SusGraphische Sammlung der Stadt Nürnberg. Hans Sachs im Dürerhaus. Ausstellung vom 22 . Mai bis 28. August 1994 im Albrecht-Dürer-Haus Nürnberg
Creators: name: Mende, Matthias
Publisher: name: University Library Heidelberg
Year: 2016

description: [nicht vorhanden / not available]
Laser interferometry with coating-free mirrors
Creators: name: Friedrich, Daniel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Interferometry
subject: thermal noise
subject: waveguide gratings
subject: SiN membranes
subject: Interferometrie
subject: thermisches Rauschen
subject: Wellenleitergitter
subject: SiN Membranen
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Charmless weak $B_s$ decays in the relativistic quark model
Creators: name: Faustov, R. N.
name: Galkin, V. O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The form factors of the weak $B_s$ transitions to the ground state and orbitally excited strange mesons are calculated in the framework of the QCD-motivated relativistic quark model based on the quasipotential approach. These form factors are expressed through the overlap integrals of meson wave functions found in their mass spectrum evaluations. The momentum dependence of the form factors is determined in the whole accessible kinematical range without any additional assumptions and extrapolations. Relativistic effects, including the wave function transformation from the rest to a moving reference frame as well as contributions of the intermediate negative-energy states, are consistently taken into account. The calculated form factors are used for the evaluation of the charmless semileptonic decay rates and two-body nonleptonic $B_s$ decays in the factorization approximation. The obtained results are confronted with previous predictions and available experimental data.
description: 18 pages, 6 figures. arXiv admin note: text overlap with arXiv:1212.3167
Least-squares finite element methods for coupled generalized Newtonian Stokes-Darcy flow
Creators: name: Münzenmaier, Steffen
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Least-squares finite element method
subject: non-Newtonian fluids
subject: Beavers-Joseph-Saffman condition
subject: a-posteriori error estimator
subject: adaptive refinement
subject: Gauß-Newton method
subject: Least-squares Finite-Element-Methode
subject: nichtnewtonsche Fluide
subject: Beavers-Joseph-Saffman Bedingung
subject: a-posteriori Fehlerschätzer
subject: adaptive Verfeinerung
subject: Gauß-Newton Verfahren
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: [no abstract]
Exploring the magnetoroton excitations in quantum wires: Inverse dielectric functions
Creators: name: Kushwaha, Manvir S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A theoretical investigation has been made of the magnetoplasmon excitations in a quantum wire characterized by a confining harmonic potential and subjected to a perpendicular magnetic field. We study the (nonlocal, dynamic) inverse dielectric function to examine the charge-density excitations within a two-subband model in the framework of Bohm-Pines' random-phase approximation. A particular stress is put on the (intersubband) magnetoroton excitation which changes the sign of its group velocity twice before merging with the respective single-particle continuum. It has already been suggested that the electronic device based on such magnetoroton excitations can act as an {\it active} laser medium [see, e.g., Phys. Rev. B {\bf 78}, 153306 (2008)]. Scrutinizing the real and imaginary parts of the inverse dielectric function provides us with an important information on the longitudinal and transverse (Hall) resistances of the system.
Las relaciones sociales de poder ladino-indígena en una comunidad quiché del occidente guatemalteco durante el siglo XX : la experiencia de San Juan Olintepeque del departamento Quetzaltenango
Creators: name: Rincón Alarcón, José Manuel
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2014
Subjects: subject: Local power relations
subject: local development Guatemala
subject: Lokale Machtbeziehungen
subject: Ladinos - Indígenas
subject: lokale Entwicklung Guatemala
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie

description: [no abstract]
Simulating rare events using a Weighted Ensemble-based string method
Creators: name: Adelman, Joshua L.
name: Grabe, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We introduce an extension to the Weighted Ensemble (WE) path sampling method to restrict sampling to a one dimensional path through a high dimensional phase space. Our method, which is based on the finite-temperature string method, permits efficient sampling of both equilibrium and non-equilibrium systems. Sampling obtained from the WE method guides the adaptive refinement of a Voronoi tessellation of order parameter space, whose generating points, upon convergence, coincide with the principle reaction pathway. We demonstrate the application of this method to several simple, two-dimensional models of driven Brownian motion and to the conformational change of the nitrogen regulatory protein C receiver domain using an elastic network model. The simplicity of the two-dimensional models allows us to directly compare the efficiency of the WE method to conventional brute force simulations and other path sampling algorithms, while the example of protein conformational change demonstrates how the method can be used to efficiently study transitions in the space of many collective variables.
title: Теория машин и механизмов
Creators: name: ELS IPR BOOKS
Publisher: name: Книта
Year: 2020

description: В учебном пособии «Теория машин и механизмов» изложен лекционныйматериал по 14 темам дисциплины, наиболее характерным для производственной деятельности педагога профессионального обучения транспортного профиля. Содержание соответствует Государственному образовательному стандарту высшего образования и методическим требованиям, предъявляемым к учебным изданиям. Учебное пособие предназначено для студентов, обучающихся по направлению подготовки 44.03.04 Профессиональное обучение. Ремонт и эксплуатация автомобильного транспорта, также оно может быть использовано студентами других отраслей профессионального обучения при изучении дисциплин ТММ и «Прикладная механика».
Stellar populations and evolution of early-type cluster galaxies: Constraints from optical imaging and spectroscopy of z=0.5-0.9 galaxy clusters
Creators: name: Jorgensen, Inger
name: Chiboucas, Kristin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an analysis of stellar populations and evolutionary history of galaxies in three similarly rich galaxy clusters MS0451.6-0305 (z=0.54), RXJ0152.7-1357 (z=0.83), and RXJ1226.9+3332 (z=0.89); based on high S/N ground-based optical spectroscopy and HST imaging for 17-34 members in each cluster. We find no indication of evolution of sizes or velocity dispersions with redshift at a given dynamical galaxy mass. We establish the Fundamental Plane (FP) and scaling relations between absorption line indices and velocity dispersions. We confirm the steeper FP at z=0.86 compared to the low redshift FP, indicating (under the assumption of passive evolution) the formation redshift, z_form, depends on the galaxy velocity dispersion (or mass). z_form varies from z_form=1.24+-0.05 at velocity dispersion of 125 km/s to 1.95+-0.25 at 225 km/s. The three clusters and the low redshift sample follow similar scaling relations between absorption line indices and velocity dispersions. The strength of the higher order Balmer lines Hdelta and Hgamma implies z_form>2.8. From the line strengths we find that [M/H] for MS0451.6-0305 is about 0.2 dex below that of the other clusters, and confirm our previous result that [alpha/Fe] for RXJ0152.7-1357 is about 0.3 dex higher than that of the other clusters. These differences between the high-redshift clusters and the low redshift sample are inconsistent with a passive evolution scenario for early-type cluster galaxies over the redshift interval studied. (abridged)
description: Accepted for publication in Astronomical Journal, 77 pages, uses emulateapj.cls, 36 figures. High resolution color figures available by e-mail request to the first author
Deceleration of SS433 radio jets
Creators: name: Panferov, A. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The mildly relativistic jets of SS\,433 are believed to inflate the surrounding supernova remnant W\,50 depositing in its expansion possibly more than 99% of their kinetic energy (\cite[1998]{Dub98}). Where and how this transformation of energy is curried out, it is not yet known. What can we learn from it that the jets decelerate and the deceleration is non-dissipative, i.e. radiatively dark. In this paper we unclose the observed deviations of the precessing radio jets of SS\,433, within a few arcseconds from a jets source, from the ballistic track, described by the kinematic model, as a signature of the deceleration which, on other hand, issues from the jets colliding with ambient medium. For that we model kinematics of these colliding jets. The ram pressure on the jets is estimated from the observed profile of brightness of synchrotron radiation along the radio jets. We have found that to fit observed locus the radio jets should be decelerated and twisted, additionally to the precession twist, mostly within the first one-fifth of precession period, and further they extend imitating ballistic jets. The fitted physical parameters of the jet model turned out to be physically reliable and characteristic for SS\,433 jets that unlikely to be occasional. This model explains naturally, and meets approval by a) the observed shock-pressed morphology of the radio jets and their brightness, b) the observed $\sim 10%$ deflections from the standard kinematic model --- just a magnitude of the jet speed decrement in the model, c) regularly observed for the radio jets the precession phase deviation from the standard kinematic model prediction, d) dichotomy of distance to the object, 4.8\,kpc vs. 5.5\,kpc, determined on the basis of the radio jets kinematics on scales of a sub-arcsecond and several arcseconds.
description: 10 pages, 2 figures
Anomalous Paths in Quantum Mechanical Path-Integrals
Creators: name: Grimsmo, Arne L.
name: Klauder, John R.
name: Skagerstam, Bo-Sture K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate modifications of the discrete-time lattice action, for a quantum mechanical particle in one spatial dimension, that vanish in the naïve continuum limit but which, nevertheless, induce non-trivial effects due to quantum fluctuations. These effects are seen to modify the geometry of the paths contributing to the path-integral describing the time evolution of the particle, which we investigate through numerical simulations. In particular, we demonstrate the existence of a modified lattice action resulting in paths with any fractal dimension, d_f, between one and two. We argue that d_f=2 is a critical value, and we exhibit a type of lattice modification where the fluctuations in the position of the particle becomes independent of the time step, in which case the paths are interpreted as superdiffusive Lévy flights. We also consider the jaggedness of the paths, and show that this gives an independent classification of lattice theories.
description: 7 pages,6 figures
Development of a novel alignment sensing and control technique for the output mode cleaner at GEO600
Creators: name: Bisht, Aparna
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2020
Subjects: subject: Gravitationswelle
subject: Differentielle Wellenfrontabtastung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We are in the era of multi-messenger astronomy, with gravitational wave detectors playing a pivotal role. All current long-baseline detectors are advanced versions of the basic Michelson interferometer. One of them is GEO600, located in Hannover, Germany, where this thesis is based. Once a detector is commissioned, it has to be maintained at a favourable operating state. This is mostly done with automatic control loops. Two of the most important kinds of control are length control and angular control. This thesis is about the development of a high bandwidth autoalignment control scheme for the detector's output beam to the output mode cleaner located just before the main photodiode. The scheme is called modulated differential wavefront sensing (MDWS) and is based on the well-known differential wavefront sensing alignment technique into the regime of beams with strong higher-order mode content. The MDWS control surpasses the pendulum resonances without additional auxiliary modulations. Due to these advantages, it is foreseen that it can replace the current autoalignment scheme called the beacon dither scheme that has a low bandwidth of less than 20\,mHz. In chapter 2, the implementation of the MDWS scheme for a stable-low-bandwidth state is shown where a bandwidth of up to 2 Hz could be achieved. This is already 100 times more than the beacon scheme's bandwidth. During the course of this work, challenges were encountered that prevented the full time implementation in a high-bandwidth state. To better understand the observed behaviour, the system was modelled in Simulink (described in chapter 3) along with a combination of modelling tools like Mathematica and Finesse and a noise budget was made with the help of the SimulinkNb tool. To make the model realistic, measurements were performed that gave a deeper understanding of several subsystems and these results have been used as model input. The knowledge gained about the system through the modelling work will form the basis of further development of the MDWS scheme and eventually in its full-time implementation.
title: Pairing OER with Adaptive Learning to Support Non-traditional Learners: Promises, Unicorns, and Barriers
Creators: name: Anderson, Jeremy
name: Roberts, Michael
Publisher: name: University of Massachusetts Amherst
Year: 2019

description: High access institutions face a double challenge in needing to control prices while maintaining high quality learning opportunities. Pairing OER with an adaptive learning system serve both outcomes, but presents its own challenges. This session will describe the efforts at The American Women’s College to leverage the benefits of each technology at scale by eliminating barriers to adoption.

This session will introduce the mission, vision, and student demographics of The American Women’s College (TAWC) in order to provide context for a description of the college’s adoption of OER and adaptive technology. Benefits – lower prices for students, personalized learning experiences at scale, improved learning outcomes – will be weighed against challenges – lack of technical standards, need for new business models to evaluate the current return on investment. These challenges compound the baseline barriers to adoption for each technology on its own. The presentation will then turn to describing a variety of methods for overcoming these challenges – strategic partnerships, investigation of OER technical structure, etc. – that have facilitated the successful integration of OER and adaptive learning at TAWC. Future directions will also be shared with the hopes of eliciting cross-institutional collaboration.

Attendees will be engaged in a variety of ways. The session will begin with live polls to learn about the attendees and their prior knowledge/experience with OER and adaptive. A back-channel Twitter feed will be used to collect open-ended questions throughout. Time will be devoted at the midpoint and end of the presentation to address these questions.

Attendees with an intermediate or advanced knowledge of OER and adaptive will benefit most from this session.
Towards Subject-Specific Therapy Planning for Non-Invasive Blood Brain Barrier Opening in Mice by Focused Ultrasound
Creators: name: Gross, Carl
name: Hopp, Torsten
name: Grudzenski-Theis, Saskia
name: Heger, Stefan
name: Fatar, Marc
name: Ruiter, Nicole V.
Publisher: name: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2021

description: Focused ultrasound (FUS) is a promising method to open the blood brain barrier (BBB) for treatment of neurodegenerative diseases. Accurate targeting is essential for a successful BBB opening (BBBo). We aim to develop a robust therapy planning for BBBo in mice, which is challenging due to the size of the brain and the influence of the skull on the ultrasound pressure distribution. For enabling mouse individual therapy planning, a simulation tool is proposed, developed and validated. We used the k-Wave toolbox to enable 3D acoustic simulations of the commercial FUS system from Image Guided Therapy (IGT). Micro-CT scans were used to model the geometry of skulls. Simulations using a mouse skull showed an attenuation of approx. 20–24% depending on the position of penetration, which was validated by hydrophone measurements in the same range. Based on these validations we planned BBBo in m ice by placing the transducer at different positions over the mouse brain and varying the excitation amplitude. With different transducer positions, the peak pressure in the brain varied between 0.54 MPa and 0.62 MPa at 11% output level, which is expected to enable safe BBBo. Subsequently, in vivo experiments were conducted using the aforementioned simulation parameters. BBBo was confirmed by contrast enhanced T1 weighted magnetic resonance images immediately after sonication.
Feasibility Evaluation of VANET using Directional-Location Aided Routing (D-LAR) Protocol
Creators: name: Raw, Ram Shringar
name: Das, Sanjoy
name: Singh, Nanhay
name: Kumar, Sanjeet
name: Kumar, Shailender
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Vehicular Ad hoc Networks (VANETs) allow vehicles to form a self-organized network without any fixed infrastructure. VANETs have received wide attention and numerous research issues have been identified in the recent time. The design and implementation of efficient and scalable routing protocols for VANETs is a challenging task due to high dynamics and mobility constraints. In this paper, we have proposed D-LAR (Directional-Location Aided Routing), is an extension of Location Aided Routing (LAR) with Directional Routing (DIR) capability. D-LAR is a greedy approach based-position based routing protocol to forward packet to the node present in request zone within the transmission range of the source node as most suitable next-hop node. We have justified the feasibility of our proposed protocol for VANET.
Essays in behavioral and labor economics
Creators: name: Straub, Alexander
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2019
Subjects: subject: competitiveness
subject: distributional preferences
subject: labor market discrimination
subject: Wettbewerbsverhalten
subject: Verteilungspräferenzen
subject: Arbeitsmarktdiskriminierung
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: Diese Dissertation untersucht die Rolle einzelner Aspekte menschlichen Verhaltens und deren Auswirkungen auf Arbeitsmarktergebnisse unter Zuhilfenahme von Experimental- und Sekundär- daten. Das erste Kapitel stellt die Relevanz des Themas heraus und zeigt mögliche politische Implikationen auf. Im zweiten Kapitel wird untersucht, ob sich Männer und Frauen in Wettbewerbsverhalten und Leistungsfähikeit unter Druck im Freizeitsport voneinander unterscheiden. Unter Verwendung von Daten aus dem Kegelsport, der sich durch gemischtgeschlechtlichen und direkten Wettbe- werb auszeichnet, finden sich keine Unterschiede im Wettbewerbsverhalten gegen das andere Geschlecht, sobald individuelle Fähigkeiten berücksichtigt werden. Die Leistungsfähikeit von Männern und Frauen unter Druck unterscheidet sich ebenfalls nicht. Das dritte Kapitel behandelt die Determinanten von Verteilungspräferenzen und deren Beziehung zu Löhnen. Im ersten Schritt werden in einem anreizkonformen Experiment offenbarte Verteilungs- präferenzen in Bezug zu Persönlichkeitsmerkmalen gesetzt. Im zweiten Schritt werden indikative Belege aufgezeigt, dass Ungleichheitsaversion und Boshaftigkeit die Einkommen in Deutschland verringern und teilweise geschlechtsspezifische Lohnunterschiede erklären können. Das vierte Kapitel untersucht unter Verwendung von Daten aus einem Laborexperiment, ob Aussehen und Religionsausübung von Bewerbern Einfluss auf Einstellungsentscheidungen haben. Es finden sich, je nach Berufsbild und Charakteristiken der Entscheider, heterogene Effekte von Verschleierung auf die Wahrscheinlichkeit, zum Vorstellungsgespräch eingeladen zu werden. Bessere Arbeitsmarktcharakteristiken der Bewerber können Diskriminierung aufgrund des Kopftuches überkompensieren. Das fünfte Kapitel analysiert, wie sowohl das eigene Erscheinungsbild als auch die Attraktivität von Mitbewerber die eigenen Chancen beeinflussen, zu einem Vorstellungsgespräch eingeladen zu werden. Basierend auf einem Laborexperiment mit randomisierten Lebensläufen zeigt sich, dass das Erscheinungsbild der gleichgeschlechtlichen Mitbewerber zusätzlich zum eigenen Schrönheitsbonus einen inkrementellen Erklärungsbeitrag liefert.
Kepler-68: Three Planets, One With a Density Between That of Earth and Ice Giants
Creators: name: Gilliland, Ronald L.
name: Marcy, Geoffrey W.
name: Rowe, Jason F.
name: Rogers, Leslie
name: Torres, Guillermo
name: Fressin, Francois
name: Lopez, Eric D.
name: Buchhave, Lars A.
name: Christensen-Dalsgaard, Joergen
name: Desert, Jean-Michel
name: Isaacson, Howard
name: Jenkins, Jon M.
name: Lissauer, Jack L.
name: Chaplin, William J.
name: Basu, Sarbani
name: Metcalfe, Travis S.
name: Elsworth, Yvonne
name: Handberg, Rasmus
name: Hekker, Saskia
name: Huber, Daniel
name: Karoff, Christoffer
name: Kjeldsen, Hans
name: Lund, Mikkel N.
name: Lundkvist, Mia
name: Miglio, Andrea
name: Charbonneau, David
name: Ford, Eric B.
name: Fortney, Jonathan J.
name: Haas, Michael R.
name: Howard, Andrew W.
name: Howell, Steve B.
name: Ragozzine, Darin
name: Thompson, Susan E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: NASA's Kepler Mission has revealed two transiting planets orbiting Kepler-68. Follow-up Doppler measurements have established the mass of the innermost planet and revealed a third jovian-mass planet orbiting beyond the two transiting planets. Kepler-68b, in a 5.4 day orbit has mass 8.3 +/- 2.3 Earth, radius 2.31 +/- 0.07 Earth radii, and a density of 3.32 +/- 0.92 (cgs), giving Kepler-68b a density intermediate between that of the ice giants and Earth. Kepler-68c is Earth-sized with a radius of 0.953 Earth and transits on a 9.6 day orbit; validation of Kepler-68c posed unique challenges. Kepler-68d has an orbital period of 580 +/- 15 days and minimum mass of Msin(i) = 0.947 Jupiter. Power spectra of the Kepler photometry at 1-minute cadence exhibit a rich and strong set of asteroseismic pulsation modes enabling detailed analysis of the stellar interior. Spectroscopy of the star coupled with asteroseismic modeling of the multiple pulsation modes yield precise measurements of stellar properties, notably Teff = 5793 +/- 74 K, M = 1.079 +/- 0.051 Msun, R = 1.243 +/- 0.019 Rsun, and density 0.7903 +/- 0.0054 (cgs), all measured with fractional uncertainties of only a few percent. Models of Kepler-68b suggest it is likely composed of rock and water, or has a H and He envelope to yield its density of about 3 (cgs).
description: 32 pages, 13 figures, Accepted to ApJ
title: Этнолингвистика
Creators: name: ELS IPR BOOKS
Publisher: name: Книта
Year: 2021

description: Учебно-методическое пособие содержит краткий лекционный материал, планы практических занятий, тестовые задания по дисциплине, этнолингвистическую тематику для студенческих научных работ, терминологический минимум, список рекомендованной литературы, вопросы для подготовки к зачету, которые разработаны в соответствии с учебным планом по дисциплине «Этнолингвистика». Учебное издание предназначено для студентов 4 курса филологического факультета очной и заочной форм обучения по направлению подготовки 45.03.01 «Филология. Отечественная филология. Русский язык и литература», 45.03.01 «Филология. Русский язык и литература, иностранный язык (английский)».
“Beyond being analysts of doom”: scientists on the frontlines of climate action
Creators: name: Artico, Daniele
name: Durham, Sarah
name: Horn, Laura
name: Mezzenzana, Francesca
name: Morrison, Malik
name: Norberg, Anna
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: activism
subject: advocacy
subject: transformative change
subject: civil disobedience
subject: climate change
subject: ecological crisis
subject: 170 Ethik (Moralphilosophie)
subject: 550 Geowissenschaften

description: What happens when scientists become activists? In this paper, we discuss the principles, commitments and experiences of Scientist Rebellion (SR), a movement of scientists, academics, and researchers committed to activism, advocacy and non-violent civil disobedience against the (in)actions of governments, corporations and other institutions, including academic ones. In sharing experiences from the frontlines of direct actions with SR along with the perspectives from individual scientists, coming from a variety of geographical locations, and a range of academic levels and disciplines, we reflect on the need to transgress the boundaries of a system of knowledge production and education that is effectively reproducing the very structures that have led us into climate and ecological crises. This article provides a reflective and critical engagement with Scientist Rebellion, drawing on a range of interviews with activists, as well as material from and about Scientist Rebellion. We conclude with a reflection on the relation between scientists and their institutions, as well as a mobilizing plea to the scientific community to take action.
Das survival of motoneuron (SMN) Protein und axonales Wachstum : Bedeutung für die molekulare Pathologie der spinalen Muskelatrophie
Creators: name: Van Bergeijk, Jeroen
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2007
Subjects: subject: SMN
subject: Actin
subject: Neuriten
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Efficient particle filtering through residual nudging
Creators: name: Luo, Xiaodong
name: Hoteit, Ibrahim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Statistics Theory (math.ST)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce an auxiliary technique, called residual nudging, to the particle filter to enhance its performance in cases that it performs poorly. The main idea of residual nudging is to monitor, and if necessary, adjust the residual norm of a state estimate in the observation space so that it does not exceed a pre-specified threshold. We suggest a rule to choose the pre-specified threshold, and construct a state estimate accordingly to achieve this objective. Numerical experiments suggest that introducing residual nudging to a particle filter may (substantially) improve its performance, in terms of filter accuracy and/or stability against divergence, especially when the particle filter is implemented with a relatively small number of particles.
description: Accepted to publish in Quarterly Journal of the Royal Meteorological Society (QJRMS)
Einfluss dynamischer Navigation auf das Verkehrsgeschehen in städtischen Straßennetzen
Creators: name: Matschke, Irina
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2007
Subjects: subject: Navigation
subject: Routenwahl
subject: mikroskopische Simulation
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::380 | Handel, Kommunikation, Verkehr

description: [no abstract]
Performances Evaluation of Enhanced Basic Time Space Priority combined with an AQM
Creators: name: Kafhali, Said El
name: Hanini, Mohamed
name: Bouchti, Abdelali El
name: Haqtq, Abdelkrim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Active Queue Management(AQM) is an efficient tool in the network to avoid saturation of the queue by warning the sender that the queue is almost full to reduce its speed before the queue is full. The buffer management schemes focus on space management, in the other hand scheduling priorities (focusing on time management) attempt to guarantee acceptable delay boundaries to applications for which it is important that delay is bounded. Combined mechanisms (time and space management) are possible and enable networks to improve the perceived quality for multimedia traffic at the end users. The key idea in this paper is to study the performance of a mechanism combining an AQM with a time-space priority scheme applied to multimedia flows transmitted to an end user in HSDPA network. The studied queue is shared by Real Time and Non Real Time packets. We propose a mathematical model using Poisson and MMPP processes to model the arrival of packets in the system. The performance parameters are analytically deducted for the Combined EB-TSP and compared to the case of Simple EB-TSP. Numerical results obtained show the positive impact of the AQM added to the EB-TSP on the performance parameters of NRT packets compared to the Simple EB-TSP.
description: 7 pages
Darstellung und Nutzung von Festphasen-gebundenen Palladium- und Ruthenium-Katalysatoren zur Verwendung in Durchflussreaktoren
Creators: name: Mennecke, Klaas
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2007
Subjects: subject: Enabling-Technik
subject: reversible Immobilisierung
subject: Palladium
subject: Ruthenium
subject: Katalyse
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Minuartia fastigiata Rchb.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: M.fastigiata (Sm.) Rchb. (M. fasciculata [L.] Hiern,Als. fasciculata Wahlenb.,Als. Jacquini Koch) Cat. 49. Bis 2000 m. 1 Nach Braun-Blanquet et Thellung Lit.1921, S.20; hier sind versehentlich die Höhenzahlen bei M.laricifolia und rostrata vertauscht. 2 Vgl. die vorige Fussnote. l: La Bâtiaz-Ravoire (Becherer und Farquet). - 2: Ausserberg (Kummer); Raron (Christ). - 3: Bei «Rive Haute» ob Orsières (Heinis und Wirz); bei Liddes (iidem);Mont-Chemin (F.); Nendaz (J.); Clebe (J.); Nax (Pannatier); Vernamiège (idem); Briex (J.); Zeneggen (Stebler); unterhalb Findelen (Zermatt) bis 2000m (Huber); Visperterminen (J., Beauverd u. a.); Gamsen (Becherer und Zwicky).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Orbital Migration of Protoplanets in a Marginally Gravitationally Unstable Disk
Creators: name: Boss, Alan P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Core accretion and disk instability require giant protoplanets to form in the presence of disk gas. Protoplanet migration models generally assume disk masses low enough that the disk's self-gravity can be neglected. However, disk instability requires a disk massive enough to be marginally gravitationally unstable (MGU). Even for core accretion, a FU Orionis outburst may require a brief MGU disk phase. We present a new set of three dimensional, gravitational radiation hydrodynamics models of MGU disks with multiple protoplanets, which interact gravitationally with the disk and with each other, including disk gas mass accretion. Initial protoplanet masses are 0.01 to 10 $M_\oplus$ for core accretion models, and 0.1 to 3 $M_{Jup}$ for Nice scenario models, starting on circular orbits with radii of 6, 8, 10, or 12 AU, inside a 0.091 $M_\odot$ disk extending from 4 to 20 AU around a $1 M_\odot$ protostar. Evolutions are followed for up to $\sim$ 4000 yr and involve phases of relative stability ($e \sim$ 0.1) interspersed with chaotic phases ($e \sim$ 0.4) of orbital interchanges. The 0.01 to 10 $M_\oplus$ cores can orbit stably for $\sim$ 1000 yr: monotonic inward or outward orbital migration of the type seen in low mass disks does not occur. A system with giant planet masses similar to our Solar System (1.0, 0.33, 0.1, 0.1 $M_{Jup}$) was stable for over 1000 yr, and a Jupiter-Saturn-like system was stable for over 3800 yr, implying that our giant planets might well survive a MGU disk phase.
description: 27 pages, 7 figures, 3 tables - in press, ApJ
Das Glykom und Proteom des porcinen Eileiters : Charakterisierung der an der Spermatozoen-Eileiter-Interaktion beteiligten Kandidaten-Glykoproteine
Creators: name: Tsolova, Miroslava
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2007
Subjects: subject: Oviduktglykoproteine
subject: N-Glykane
subject: MALDI-TOF-MS
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Precision Measurement of the e+e- --> K+K-(gamma) Cross Section with the Initial-State Radiation Method at BaBar
Creators: name: The BaBar Collaboration
name: Lees, J. P.
name: Others
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A precise measurement of the cross section for the process e+e- --> K+K-(gamma) from threshold to an energy of 5 GeV is obtained with the initial-state radiation (ISR) method using 232 fb^{-1} of data collected with the BaBar detector at e+e- center-of-mass energies near 10.6 GeV. The measurement uses the effective ISR luminosity determined from the e+e- --> mu+mu-(gamma)gamma_ISR process with the same data set. The corresponding lowest-order contribution to the hadronic vacuum polarization term in the muon magnetic anomaly is found to be a_mu^{KK, LO}=(22.93 +- 0.18_{stat} +- 0.22_{syst}) * 10^{-10}. The charged kaon form factor is extracted and compared to previous results. Its magnitude at large energy significantly exceeds the asymptotic QCD prediction, while the measured slope is consistent with the prediction.
description: 32 pages, 56 postscript figures, submitted to PRD
Effect of the Feedback Function on the QoS in a Time Space Priority with Active Queue Management
Creators: name: Hanini, Mohamed
name: Kafhali, Said El
name: Haqtq, Abdelkrim
name: Berqta, Amine
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The basic idea behind an active queue management (AQM) is to sense the congestion level within the network and inform the packet sources about, so that they reduce their sending rate. In literature a lot off mechanisms of AQM are studied. But there are not used in the context of the DiffServ architecture where different types of packet with different requirements of QoS share the same link. In this paper, we study an access control mechanism for RT and NRT packets arriving in a buffer implemented at an end user in HSDPA. The mechanism uses thresholds to mange access in the buffer and gives access priority to RT packets. In order to control the arrival rate of the NRT packets in the buffer an active queue management is used. We study the effect of the feedback function on the QoS parameters for both kinds of packets .Mathematical description and analytical results are given, and numerical results show that the proposed function achieves higher QoS for the NRT packets in the system.
description: 5 pages
title: Unverzichtbar im Alltag. Textilhandwerk bei den spätneolithischen Pfahlbauern
Creators: name: Banck-Burgess, Johanna
Publisher: name: University Library Heidelberg
Year: 2016

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 45, Nr. 1 (2016), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Теория коммуникации
Creators: name: ELS IPR BOOKS
Publisher: name: Книта
Year: 2021

description: Учебно-методическое пособие разработано в соответствии с учебным планом по дисциплине «Теория коммуникации» и ориентировано на оказание помощи студенту в изучении теоретического материала курса, при подготовке к семинарским занятиям, в овладении процессом коммуникации, практическими навыками и умениями, необходимыми для будущего специалиста. Учебное издание предназначено для студентов-филологов очной и заочной форм обучения, изучающих учебную дисциплину «Теория коммуникации», а также всех, кто желает углубить свои знания в сфере коммуникологии.
Observable effects of Interplanetary Coronal Mass Ejections on ground level neutron monitor counting rates
Creators: name: Blanco, J. J.
name: Catalán, E.
name: Hidalgo, M. A.
name: Medina, J.
name: García, O.
name: Rodríguez-Pacheco, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this work, non-recurrent Forbush decreases (FDs) triggered by the passage of shock-driven interplanetary coronal mass ejections (ICMEs) have been analyzed. Fifty-nine ICMEs have been studied but only the 25% of them were associated to a FD. We find that shock-driving magnetic clouds (MCs) produce deeper FDs than shock-driving ejecta. This fact can be explained regarding to the observed growing trends between decreases in neutron monitor (NM) count rate and MC/ejecta speed and its associated rigidity. MCs are faster and have higher associated rigidities than ejecta. Also the deceleration of ICMEs seems to be a cause in producing FDs as can be inferred from the decreasing trend between NM count rate and deceleration. This probably implies that the interaction between the ICME traveling from the corona to the Earth and the solar wind can play an important role to produce deeper FDs. Finally, we conclude that ejecta without flux rope topology are the less effective in unchaining FDs.
description: 14 pages, 5 figures
Scale-dependent correction to the dynamical conductivity of a disordered system at unitary symmetry
Creators: name: Ostrovsky, P. M.
name: Nakayama, T.
name: Muttalib, K. A.
name: Wölfle, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Anderson localization has been studied extensively for more than half a century. However, while our understanding has been greatly enhanced by calculations based on a small epsilon expansion in d = 2 + epsilon dimensions in the framework of non-linear sigma models, those results can not be safely extrapolated to d = 3. Here we calculate the leading scale-dependent correction to the frequency-dependent conductivity sigma(omega) in dimensions d <= 3. At d = 3 we find a leading correction Re{sigma(omega)} ~ |omega|, which at low frequency is much larger than the omega^2 correction deriving from the Drude law. We also determine the leading correction to the renormalization group beta-function in the metallic phase at d = 3.
description: 5 pages, 3 figures
Effect of Mobility and Traffic Models on the Energy Consumption in MANET Routing Protocols
Creators: name: Kafhali, Said El
name: Haqiq, Abdelkrim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: A Mobile Ad hoc Network (MANET) is a group of mobile nodes that can be set up randomly and formed without the need of any existing network infrastructure or centralized administration. In this network the mobile devices are dependent on battery power, it is important to minimize their energy consumption. Also storage capacity and power are severely limited. In situations such as emergency rescue, military actions, and scientific field missions, energy conservation plays an even more important role which is critical to the success of the tasks performed by the network. Therefore, energy conservation should be considered carefully when designing or evaluating ad hoc routing protocols. In this paper we concentrated on the energy consumption issues of existing routing protocols in MANET under various mobility models and whose connections communicate in a particular traffic model (CBR, Exponential, and Pareto). This paper describes a performance comparison of the AODV, DSR and DSDV routing protocols in term of energy consumed due to packet type (routing/MAC) during transmission and reception of control packets. The mobility models used in this work are Random Waypoint, Manhattan Grid and Reference Point Group. Simulations have been carried out using NS-2 and its associated tools for animation and analysis of results.
description: 8 pages. arXiv admin note: substantial text overlap with arXiv:1304.2035
Isogeometric cohesive elements for two and three dimensional composite delamination analysis
Creators: name: Nguyen, Vinh Phu
name: Kerfriden, Pierre
name: Bordas, Stephane
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Isogeometric cohesive elements are presented for modeling two and three dimensional delaminated composite structures. We exploit the knot insertion algorithm offered by NURBS (Non Uniform Rational B-splines) to generate cohesive elements along delamination planes in an automatic fashion. A complete computational framework is presented including pre-processing, processing and post-processing. They are explained in details and implemented in MIGFEM--an open source Matlab Isogemetric Analysis code developed by the authors. The composite laminates are modeled using both NURBS solid and shell elements. Several two and three dimensional examples ranging from standard delamination tests (the mixed mode bending test), the L-shaped specimen with a fillet, three dimensional (3D) double cantilever beam and a 3D singly curved thick-walled laminate are provided. To the authors' knowledge, it is the first time that NURBS-based isogeometric analysis for two/three dimensional delamination modeling is presented. For all examples considered, the proposed framework outperforms conventional Lagrange finite elements.