cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The large amplitude outburst of the young star HBC 722 in NGC 7000/IC 5070, a new FU Orionis candidate
Creators: name: Semkov, E.
name: Peneva, S.
name: Munari, U.
name: Milani, A.
name: Valisa, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery of a large amplitude outburst from the young star HBC 722 (LkHA 188 G4) located in the region of NGC 7000/IC 5070. On the basis of photometric and spectroscopic observations, we argue that this outburst is of the FU Orionis type. We gathered photometric and spectroscopic observations of the object both in the pre-outburst state and during a phase of increase in its brightness. The photometric BVRI data (Johnson-Cousins system) that we present were collected from April 2009 to September 2010. To facilitate transformation from instrumental measurements to the standard system, fifteen comparison stars in the field of HBC 722 were calibrated in the BVRI bands. Optical spectra of HBC 722 were obtained with the 1.3-m telescope of Skinakas Observatory (Crete, Greece) and the 0.6-m telescope of Schiaparelli Observatory in Varese (Italy). The pre-outburst photometric and spectroscopic observations of HBC 722 show both low amplitude photometric variations and an emission-line spectrum typical of T Tau stars. The observed outburst started before May 2010 and reached its maximum brightness in September 2010, with a recorded Delta V~4.7 mag. amplitude. Simultaneously with the increase in brightness the color indices changed significantly and the star became appreciably bluer. The light curve of HBC 722 during the period of rise in brightness is similar to the light curves of the classical FUors - FU Ori and V1057 Cyg. The spectral observations during the time of increase in brightness showed significant changes in both the profiles and intensity of the spectral lines. Only H alpha remained in emission, while the H beta, Na I 5890/5896, Mg I triplet 5174, and Ba II 5854/6497 lines were in strong absorption.
description: 4 pages, 6 figures, accepted for publication in A&A
Measuring social sustainability of the public realm : design of street frontages as a precondition for social sustainability
Creators: name: Atanackovic-Puzovic, Slavica
Publisher: name: University of British Columbia
Year: 2018

description: Recently sustainability has become a common consideration for urban development and design. However, its social dimension has been relatively neglected thus far (Vallanc, Perkins, and Dixon 2011; J. Robinson 2004, 378). This issue is especially significant when it comes to the development of the public realm of a city. Various elements of the public realm, including streets, are places where people meet, interact, and socialize. For this reason, the social aspect of sustainability should be one of the essential criteria when designing and developing public spaces. The focus of this study is the street as an element of the public realm and the relationship between the design of street frontages and the social sustainability of a street. From the complex spectrum of features of social sustainability, only those that are directly related to the design of street frontages were analyzed. The study was conducted at four locations in Vancouver. The results show that even though a particular area might be perceived as the one with high social qualities, it might still miss some of the critical elements of social sustainability. Additionally, it was concluded that certain features automatically induce many other qualities, promoting the development of social sustainability. The goal of this study was to generate information that could be used as a framework for future urban developments, so that cities can achieve social sustainability of the public realm.
Antisymmetric Tensor Fields in Randall Sundrum Thick Branes
Creators: name: Alencar, G.
name: Landim, R. R.
name: Tahim, M. O.
name: Muniz, C. R.
name: Filho, R. N. Costa
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article we study the issue of localization of the three-form field in a Randall-Sundrum-like scenario. We simulate our membrane by kinks embedded in D=5, describing the usual case (not deformed) and new models coming from a specific deformation procedure. The gravitational background regarded includes the dilaton contribution. We show that we can only localize the zero-mode of this field for a specific range of the dilaton coupling, even in the deformed case. A study about resonances is presented. We use a numerical approach for calculations of the transmission coefficients associated to the quantum mechanical problem. This gives a clear description of the physics involved in the model. We find in this way that the appearance of resonances is strongly dependent on the coupling constant. We study the cases $p=1,3$ and 5 for $α=-1.75$ and $α=-20$. The first value of $α$ give us one resonance peak for $p=1$ and no resonances for $p=3,5$. The second value of $α$ give us a very rich structure of resonances, with number deppending on the value of $p$.
description: 7 pages, 3 figures
MPEC 2023-X152 : DAILY ORBIT UPDATE (2023 December 8)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Ultrashort light bullets described by the two-dimensional sine-Gordon equation
Creators: name: Leblond, Hervé
name: Mihalache, Dumitru
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: By using a reductive perturbation technique applied to a two-level model, this study puts forward a generic two-dimensional sine-Gordon evolution equation governing the propagation of femtosecond spatiotemporal optical solitons in Kerr media beyond the slowly varying envelope approximation. Direct numerical simulations show that, in contrast to the long-wave approximation, no collapse occurs, and that robust (2+1)-dimensional ultrashort light bullets may form from adequately chosen few-cycle input spatiotemporal wave forms. In contrast to the case of quadratic nonlinearity, the light bullets oscillate in both space and time and are therefore not steady-state lumps.
Monte Carlo dosimetry of total body irradiation
Creators: name: Burns, Levi
Publisher: name: University of British Columbia
Year: 2018

description: The total body irradiation (TBI) technique at the Vancouver Cancer Centre uses a sweeping Cobalt-60 beam with patient-specific lung compensators and a stationary flattening filter, with the patient lying in supine and prone positions during each fraction. The dose calculations for this technique are limited to the dose delivered to a point at patient mid-separation at the level of the umbilicus, and the mean dose to the body must fall within a 10% tolerance of prescription. While the current technique is effective, it has been in place for over 23 years, and detailed dose data to critical organs is necessary before the technique can be upgraded to a more conformal technique that would offer an improved patient experience. For this purpose, a Monte Carlo simulation technique has been developed and applied to collect organ dose data from TBI treatments based on retrospective data of patients recently treated with 12 Gy in 6 fractions. 20 patients, including adults and pediatric patients, are simulated by constructing Monte Carlo phantoms in each of the supine and prone positions based on planning CT images. The supine and prone dose distributions are summed with a deformable registration tool and the doses to the lungs, kidneys, thyroid, and liver are analyzed as well as the dose delivered to the body. It is determined that while all doses fall within prescription, there is a trend where smaller patients receive lower mean body doses and viceversa (mean body dose range: 10.93-12.01 Gy). For most patients, the lungs and liver consistently receive doses below the mean body dose, and the thyroid and kidneys consistently receive higher doses than the mean body dose. This thesis presents an overview of the background physics and biology of TBI as well as a comprehensive survey of different techniques described in the literature. The Monte Carlo simulation technique used for the retrospective study is described with calibration, validation, and optimization details, and the organ dose results of the retrospective study are shown.
Higgs boson mass bounds in the presence of a very heavy fourth quark generation
Creators: name: Gerhold, P.
name: Jansen, K.
name: Kallarackal, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the effect of a potential fourth quark generation on the upper and lower Higgs boson mass bounds. This investigation is based on the numerical evaluation of a chirally invariant lattice Higgs-Yukawa model emulating the same Higgs-fermion coupling structure as in the Higgs sector of the electroweak Standard Model. In particular, the considered model obeys a Ginsparg-Wilson version of the underlying ${SU}(2)_L\times {U}(1)_Y$ symmetry, being a global symmetry here due to the neglection of gauge fields in this model. We present our results on the modification of the upper and lower Higgs boson mass bounds induced by the presence of a hypothetical very heavy fourth quark doublet. Finally, we compare these findings to the standard scenario of three fermion generations.
description: 9 pages, 3 figures
The Achilles Heel of Police Body-Worn Cameras: Understanding the Factors That Influence Variation in Body-Worn Camera Activation
Creators: name: Katz, Charles M.
name: Huff, Jessica
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Science Policy
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology

description: While body-worn cameras (BWCs) are increasingly becoming commonplace in police organizations, researchers and policymakers still know little about their implementation in the field and the factors related to their actual use. Using data collected from 146,601 incidents in Phoenix, Arizona, the present study examines the prevalence and correlates of BWC activation. In doing so, we examine the impact of incident-level factors, officer characteristics, neighborhood context, and changes in BWC activation policy on whether an officer who is assigned to wear a BWC activates their camera during a police-citizen contact. Cross-classified models are used to simultaneously assess the influence of factors at multiple levels of explanation. Our analysis suggests that a wide variety of individual, situational, organizational, and neighborhood factors are related to an officer’s decision to activate their camera. BWC policy that confines, structures, and checks officer activation has a robust impact on an officer’s decision to activate their BWC.
Triplet contribution to the Josephson current in the nonequilibrium SFS junction
Creators: name: Bobkova, I. V.
name: Bobkov, A. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Josephson current through a long s-wave superconductor/weak ferromagnet/s-wave superconductor weak link is studied theoretically in the regime of nonequilibrium spin-dependent occupation of electron states in the ferromagnetic intelayer. While under the considered nonequilibrium conditions the standard supercurrent, carried by the singlet part of current-carrying density of states, practically is not modified, the additional supercurrent flowing via the triplet part of the current-carrying density of states appears. Depending on voltage, controlling the particular form of spin-dependent nonequilibrium in the interlayer, this additional current can enhance or reduce the usual current of the singlet component and also switch the junction between $0$- and $π$-states.
description: 6 pages, 4 figures, extended version of arXiv:0911.1646
Boundary conditions and amplitude ratios for finite-size corrections of a one-dimensional quantum spin model
Creators: name: Izmailian, N. Sh.
name: Hu, Chin-Kun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the influence of boundary conditions on the finite-size corrections of a one-dimensional (1D) quantum spin model by exact and perturbative theoretic calculations. We obtain two new infinite sets of universal amplitude ratios for the finite-size correction terms of the 1D quantum spin model of $N$ sites with free and antiperiodic boundary conditions. The results for the lowest two orders are in perfect agreement with a perturbative conformal field theory scenario proposed by Cardy [Nucl. Phys. B {\bf 270}, 186 (1986)].
description: 15 pages
Collapse of ultrashort spatiotemporal pulses described by the cubic generalized Kadomtsev-Petviashvili equation
Creators: name: Leblond, Hervé
name: Kremer, David
name: Mihalache, Dumitru
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: By using a reductive perturbation method, we derive from Maxwell-Bloch equations a cubic generalized Kadomtsev-Petviashvili equation for ultrashort spatiotemporal optical pulse propagation in cubic (Kerr-like) media without the use of the slowly varying envelope approximation. We calculate the collapse threshold for the propagation of few-cycle spatiotemporal pulses described by the generic cubic generalized Kadomtsev-Petviashvili equation by a direct numerical method and compare it to analytic results based on a rigorous virial theorem. Besides, typical evolution of the spectrum (integrated over the transverse spatial coordinate) is given and a strongly asymmetric spectral broadening of ultrashort spatiotemporal pulses during collapse is evidenced.
Measurement of night sky brightness in southern Australia
Creators: name: Hampf, Daniel
name: Rowell, Gavin
name: Wild, Neville
name: Sudholz, Tristan
name: Horns, Dieter
name: Tluczykont, Martin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Night sky brightness is a major source of noise both for Cherenkov telescopes as well as for wide-angle Cherenkov detectors. Therefore, it is important to know the level of night sky brightness at potential sites for future experiments. The measurements of night sky brightness presented here were carried out at Fowler's Gap, a research station in New South Wales, Australia, which is a potential site for the proposed TenTen Cherenkov telescope system and the planned wide-angle Cherenkov detector system HiSCORE. A portable instrument was developed and measurements of the night sky brightness were taken in February and August 2010. Brightness levels were measured for a range of different sky regions and in various spectral bands. The night sky brightness in the relevant wavelength regime for photomultipliers was found to be at the same level as measured in similar campaigns at the established Cherenkov telescope sites of Khomas, Namibia, and at La Palma. The brightness of dark regions in the sky is about 2 x 10^12 photons/(s sr m^2) between 300 nm and 650 nm, and up to four times brighter in bright regions of the sky towards the galactic plane. The brightness in V band is 21.6 magnitudes per arcsec^2 in the dark regions. All brightness levels are averaged over the field of view of the instrument of about 1.3 x 10^(-3) sr. The spectrum of the night sky brightness was found to be dominated by longer wavelengths, which allows to apply filters to separate the night sky brightness from the blue Cherenkov light. The possible gain in the signal to noise ratio was found to be up to 1.2, assuming an ideal low-pass filter.
description: 9 pages, 9 figures. Accepted for publication in Advances in Space Research as Proc to COSPAR 2010
Intrinsic lifetimes and anharmonic frequency shifts of long-wavelength optical phonons in polar crystals
Creators: name: Deinzer, Gernot
name: Schmitt, Michael
name: Mayer, Andreas P.
name: Strauch, Dieter
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik

description: Quantitative calculations of phonon lifetimes due to anharmonic three-phonon processes require knowledge of cubic anharmonic coupling coefficients. In order to determine the temperature dependence of phonon frequencies, anharmonic force constants of up to fourth order are needed. In polar crystals, the macroscopic electric field gives rise to nonanalytic terms in these coefficients. It is shown how these non-analytic terms can be determined from other physical quantities including higher-order dipole moments, Raman coefficients, and nonlinear susceptibilities. The contribution of these terms to the intrinsic damping of the long-wavelength optical phonon modes in GaAs has been determined by an ab initio calculation.
title: The Relation Between EU Competition Policy and Consumers in Online Multi-Sided Platform Market
title: An Analysis Based on Consumer Welfare Standard
titleType: Subtitle
Creators: name: Ekingen, Erman
Publisher: name: Lancaster University
Year: 2027
Subjects: Eu competition law
online multi-sided platforms
platform regulation
consumer welfare

description: The Internet has unleashed a boom of entrepreneurship and competition which is unrivalled in history and in the modern era. As a natural consequence of the invention of the Internet and the development of technology and trade, different environments where trade can flourish also began to arise and they pose many differences and necessities which have to be considered by lawmakers. One of these new environments for trade is online multi-sided platforms (MSP). Even though they bring some advantages, they also introduce many new risks for organisations, consumers, governments and the global economy as the existing EU competition rules are planned and regulated to remove the problems within traditional single-sided markets, which consist of a single relationship between actors. One of the basic problems that can be seen is in the positions and conditions of consumers. The relationships between actors in online MSP markets are not as basic and separated as in traditional single-sided markets. For that reason, the behaviour of the online MSPs to consumers and the results of their specific practices can create anticompetitive results such as unfair pricing, lower quality, less variety of products and slower innovation in these markets. Therefore, this thesis aims to analyse how these emerging dynamics in online MSP markets affect consumers’ positions and conditions by reviewing the consumer welfare standard in different existing practices of these platforms. After the consumer welfare oriented competition analysis of geo-blocking, tying and bundling, and most-favoured-nation (MFN) practices of online MSPs, the discussion will conclude that it is necessary to secure greater competition among online MSPs, provide the right conditions for the digital single market in the EU, update existing competition tools in accordance with the need of online MSP markets and the digital economy, and finally provide a comprehensive set of rules for these markets.
Re-expression of the retinoblastoma-binding protein 2-homolog 1 reveals tumor-suppressive functions in highly metastatic melanoma cells
Creators: name: Roesch, Alexander
name: Becker, Bernd
name: Schneider-Brachert, Wulf
name: Hagen, Ilja
name: Landthaler, Michael
name: Vogt, Thomas
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 610 Medizin

description: The loss of cell cycle control in malignant melanomas is thought to be due to a lack of retinoblastoma protein (pRb) activity. We have recently reported a progressive deficiency of the retinoblastoma-binding protein 2-homolog 1 (RBP2-H1) in advanced and metastatic melanomas in vivo, suggesting a role of RBP2-H1 in loss of pRb-mediated control. Therefore, in this study, we re-established the pRb-modulating function of RBP2-H1 in highly metastatic A375-SM melanoma cells by re-expressing its C-term (cRBP2-H1). As previously shown, the corresponding domains comprise the pRb-binding region of the RBP2-H1 protein (non-T/E1A-pRb-binding domain (NTE1A)). As a result, we detected pRb-hypophosphorylation selectively at Ser795, but not at Ser780 and Ser807/811 throughout the G1 phase of the cell cycle. As a further consequence, a block in G1/S transition was observed accompanied by a significant decrease of DNA replication and cellular proliferation. As demonstrated by cDNA microarrays of cRBP2-H1-transduced cells and confirmed by quantitative TaqMan reverse transcriptase-PCR, differential expression of melanoma-progression-related genes was observed, among them bone morphogenetic protein 2, follistatin, transforming growth factor alpha, hepatocyte growth factor, transcription factor 4 and microphthalmia-associated transcription factor. Conclusively, these data suggest that RBP2-H1 exerts a broad tumor-suppressive function partially mediated by pRb modulation. Therefore, re-establishing of RBP2-H1 could evolve as an interesting novel approach in developing experimental treatments for metastatic melanomas.
Stroma-targeted palliative tumor therapy with biomodulators
Creators: name: Hafner, Christian
name: Landthaler, Michael
name: Vogt, Thomas
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 610 Medizin

description: In search of new strategies for the therapy of advanced tumors stroma-targeted approaches have been discussed recently, especially antiangiogenic therapies. It has turned out that some biomodulating drugs exhibit also effects against tumors beyond their original non-oncologic indication. Among these drugs are for example thalidomide,COX-2 inhibitors, PPARγ agonists (thiazolidindiones) and mTOR antagonists (rapamycin).The antitumor efficacy of these therapeutics is fundamentally based on indirect effects on the stroma of the tumors. Combination therapies of these therapeutics seem to be superior to the use of single agents. These new biomodulating therapy approaches represent an interesting option for the palliative treatment of advanced tumors, especially as a supplement or extension of established chemo- and immunotherapeutic therapies, since they can be performed in an outpatient setting, the observed side effects are usually mild, and the therapies are therefore well accepted by the patients.
 Auf der Suche nach neuen Strategien zur Therapie von Tumoren in fortgeschrittenen Stadien wurden in jüngster Zeit vermehrt Stroma-orientierte Ansätze diskutiert, insbesondere antiangiogenetische Therapien. Es hat sich gezeigt, dass einige biomodulierende Medikamente über ihre ursprüngliche nichtonkologische Indikation hinaus auch antitumoral wirksam sind. Zu diesen Medikamenten gehören z. B. Thalidomid, COX-2 Inhibitoren, PPARγ Agonisten (Thiazolidindione) und mTOR Antagonisten (Rapamycin). Ein wesentlicher Teil der antitumoralen Wirksamkeit dieser Therapeutika beruht dabei auf indirekten Effekten auf das Tumorstroma. Dabei scheinen Kombinationstherapien dieser Pharmaka den Monotherapien überlegen zu sein. Aufgrund der ambulanten Durchführbarkeit dieser Therapien, der meist geringen Nebenwirkungen und der dadurch guten Akzeptanz bei den Patienten stellen diese neuen biomodulierenden Therapieansätze eine interessante Option in der palliativen Therapie fortgeschrittener Tumoren dar, insbesondere auch als Ergänzung und Erweiterung der klassischen chemo- und immuntherapeutischen Möglichkeiten.
description: deutscher Titel: Stroma-orientierte palliative Tumortherapie mit Biomodulatoren
FABSPACE 2.0: THE OPEN-INNOVATION NETWORK FOR GEODATA-DRIVEN INNOVATION
Creators: name: Del Frate, F.
name: Mothe, J.
name: Barbier, C.
name: Becker, M.
name: Olszewski, R.
name: Soudris, D.
Publisher: name: Zenodo
Year: 2019
Subjects: FabSpace 2.0
IEEE
IGARSS 2017

description: Oral presentation slide
Spectroscopy of "Big Trio" objects using the "Scorpio" spectrograph of the 6-m telescope of the Special astrophysical observatory
Creators: name: Parijskij, Yurij N.
name: Kopylov, Alexander I.
name: Temirova, Adelina V.
name: Soboleva, Natalia S.
name: Zhelenkova, Olga P.
name: Verkhodanov, Oleg V.
name: Goss, William Miller
name: Fatkhullin, Timur A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the results of spectroscopy of 71 objects with steep and ultra-steep spectra ($α
description: 11 pages, 5 figures
$ρ^{0}$-vector meson elliptic flow ($v_{2}$) in $Au+Au$ collisions at $\sqrt{s_{NN}} = 200$ GeV in STAR at RHIC
Creators: name: Pujahari, Prabhat
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The first measurement of the $ρ^{0}$ - vector meson elliptic flow $v_{2}$ at mid-rapidity ($|y |$ $
description: 4 pages, 6 figures, proceeding for the 6th International Conference on Physics and Astrophysics of Quark Gluon Plasma (ICPAQGP 2010)
Ab initio calculation of the linewidth of various phonon modes in germanium and silicon
Creators: name: Deinzer, Gernot
name: Birner, Gerd
name: Strauch, Dieter
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: The 2n+1 theorem and the density-functional perturbation theory have been used to calculate anharmonic force constants completely ab initio. Explicit expressions for the anharmonic coupling constants are presented, i.e., for the third-order derivatives of the total energy with respect to atomic displacements. Using the harmonic as well as the anharmonic results the phonon linewidth of Ge and Si as a function of temperature has been calculated for various branches and various (in particular, for nonvanishing) wave vectors completely ab initio.
Realitätsnahe Bewertung des Einflusses der Oberflächenspannung flüssiger Zwischenmedien auf den maximalen Reibschluss zwischen Reifen und Fahrbahn
Creators: name: Bürckert, Matthias
Publisher: name: KIT Scientific Publishing
Year: 2019
Subjects: Reifen-Fahrbahn-Reibung
Zwischenmedium
nasse Fahrbahn
Oberflächenspannung
Benetzungsverhalten
tire-road-friction
intermediary substance
wet surface
surface tension
wetting behaviour

description: Nach einsetzendem Regen kann der Fall eintreten, dass der Reifen-Fahrbahn-Reibwert erheblich reduziert sein kann. Dies kann darauf zurückgeführt werden, dass sich nicht reines Wasser im Kontakt befindet, sondern dass in diesem Wasser auf der Straßenoberfläche befindliche Verschmutzungen gelöst oder dispergiert sein können. Dies kann dazu führen, dass sich die Viskosität oder/und die Oberflächenspannung des Wassers verändert und sich dies nachteilig auf den Reibwert auswirkt.
Про час появи печенігів на території України
Creators: name: Орлов, Руслан
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430101
subject: Archaeological science

description: Орлов Р.С. Про час появи печинігів на території України — Етнокультурні процеси в Південно-Східній Європі в І тис.н.е. - Київ-Львів, 1999. - с.174-185
Про час появи печинігів на території України
Creators: name: Орлов, Руслан
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430101
subject: Archaeological science

description: Орлов Р.С. Про час появи печинігів на території України — Етнокультурні процеси в Південно-Східній Європі в І тис.н.е. - Київ-Львів, 1999. - с.174-185
Effect of N-acetyl-L-cysteine on ROS production and cell death caused by HEMA in human primary gingival fibroblasts
Creators: name: Spagnuolo, Gianrico
name: D'Antò, Vincenzo
name: Cosentino, Claudia
name: Schmalz, Gottfried
name: Schweikl, Helmut
name: Rengo, Sandro
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: Dental resin; HEMA; Human gingival fibroblasts; NAC; Reactive oxygen species
subject: 570 Biowissenschaften, Biologie
subject: 610 Medizin

description: Previous investigations have shown that 2-hydroxyethyl methacrylate (HEMA) causes reactive oxygen species (ROS) production, which in turn affects cell survival and cell death. The purpose of this study was to evaluate the effects of the antioxidant N-acetyl-L-cysteine (NAC) on HEMA-induced toxicity in human primary gingival fibroblasts (HGF). HGF were treated with various concentrations of HEMA (0-12 mm) in the absence and presence of NAC (1, 5, and 10 mm). The 3-(4,5 dimethyiazol-2-1)-2-5-diphenyl tetrazolium bromide (MTT) assay was used to evaluate the mitochondrial dehydrogenase activity after HEMA exposure. Viability and cell death were determined by flow cytometry using Annexin V and PI staining. ROS production was detected by the increasing fluorescence of the oxidation-sensitive dye 2',7'-dichlorofluorescein diacetate (DCFH-DA) after HEMA treatment. After a 24h incubation period, HEMA concentrations higher then 10mm caused a decrease of cell viability, mitochondrial activity, and an increase of cell death. HEMA concentrations of 4-12 mm markedly increased ROS levels in a dose-dependent manner. High NAC concentrations (5 and 10 mm) significantly reduced cell death, and restored the mitochondrial activity after a 24 h co-treatment, but 1 mm NAC increased HEMA toxicity (p<0.05). All NAC concentrations significantly reduced ROS levels induced by HEMA after a 2 h exposure (p<0.05), but no such reduction was observed after a 4 h treatment. Furthermore, treatment with 10 mm HEMA and 1 mm NAC for 6h caused an increase in ROS levels compared to 10 mm HEMA alone (p<0.05). In conclusion, our results suggest that high NAC concentrations protect HGF against HEMA cytotoxicity by reducing the induced ROS levels.
A novel drug-eluting stent coated with an integrin-binding cyclic Arg-Gly-Asp peptide inhibits neointimal hyperplasia by recruiting endothelial progenitor cells
Creators: name: Blindt, Rüdiger
name: Vogt, Felix
name: Astafieva, Irina
name: Fach, Christian
name: Hristov, Mihail
name: Krott, Nicole
name: Seitz, Berthold
name: Kapurniotu, Aphrodite
name: Kwok, Connie
name: Dewor, Manfred
name: Bosserhoff, Anja-Katrin
name: Bernhagen, Jürgen
name: Hanrath, Peter
name: Hoffmann, Rainer
name: Weber, Christian
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 610 Medizin

description: OBJECTIVES: Novel stents loaded with an integrin-binding cyclic Arg-Gly-Asp peptide (cRGD) were analyzed for their potential to limit coronary neointima formation and to accelerate endothelialization by attracting endothelial progenitor cells (EPCs). BACKGROUND: Re-endothelialization is important for healing after arterial injury. METHODS: Effects of cRGD on EPC number, recruitment in flow, and invasion were analyzed in vitro. A durable polymer coating containing 67 microg cRGD per stent was developed for Guidant Tetra stents. Twelve cRGD-loaded polymer, 12 unloaded polymer, and 12 bare metal stents were deployed in porcine coronary arteries. Quantification of cRGD in peri-stent tissue was established by high-performance liquid chromatography (HPLC) and mass spectrometry (MS). Histomorphometry and immunostaining were performed after 4 and 12 weeks. Recruitment of labeled porcine EPCs was assessed 7 days after intracoronary infusion. RESULTS: The cRGD clearly supported the outgrowth, recruitment, and migration of EPCs in vitro. At 4 weeks, there was no difference for mean neointimal area and percent area stenosis in the cRGD-loaded, polymer, or bare metal stent group. At 12 weeks, neointimal area (2.2 +/- 0.3 mm2) and percent area stenosis (33 +/- 5%) were significantly reduced compared with polymer stents (3.8 +/- 0.4 mm2, 54 +/- 6%; p = 0.010) or bare metal stents (3.8 +/- 0.3 mm2, 53 +/- 3%; p < 0.001). The HPLC/MS confirmed cRGD tissue levels of 1 to 3 mug/stent at 4 weeks, whereas cRGD was not detectable at 12 weeks. Staining for CD34 and scanning electron microscopy indicated enhanced endothelial coverage on cRGD-loaded stents at 4 weeks associated with a significant increase in the early recruitment of infused EPCs. CONCLUSIONS: Stent coating with cRGD may be useful for reducing in-stent restenosis by accelerating endothelialization.
Difference system for Selberg correlation integrals
Creators: name: Forrester, Peter J.
name: Ito, Masahiko
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Selberg correlation integrals are averages of the products $\prod_{s=1}^m\prod_{l=1}^n (x_s - z_l)^{μ_s}$ with respect to the Selberg density. Our interest is in the case $m=1$, $μ_1 = μ$, when this corresponds to the $μ$-th moment of the corresponding characteristic polynomial. We give the explicit form of a $(n+1) \times (n+1)$ matrix linear difference system in the variable $μ$ which determines the average, and we give the Gauss decomposition of the corresponding $(n+1) \times (n+1)$ matrix. For $μ$ a positive integer the difference system can be used to efficiently compute the power series defined by this average.
description: 21 pages
Evaluating key assumptions of a hook-based relative abundance index derived from the catch of bottom longlines
Creators: name: Obradovich, Shannon Grace
Publisher: name: University of British Columbia
Year: 2018

description: Catches from bottom longline surveys are used to construct relative abundance indices for many demersal species. Due to their careful design, survey-based relative abundance indices are assumed to be proportional to the true species abundance. However, longlines catches may be affected by interspecific competition, gear saturation, and fine-scale gear and species interactions created by feeding behaviours and habitat preferences. A hook-based relative abundance index, the instantaneous rate of bait loss per species (λs), which accounts for hook competition and gear saturation, may resolve some of the problems with the common catch per unit effort (CPUE) index. I evaluated whether a linear or non-linear relationship exists between the λs index and abundance, and whether assumptions about bare hooks, species behaviours and fine-scale habitat affect the λs index. Using longlines targeting Yelloweye Rockfish (Sebastes ruberrimus) and Quillback Rockfish (S. maliger) in the inside waters of Vancouver Island, British Columbia, Canada, as a case study, I compared longline catches with underwater observations of the hooks and surrounding species from a Remotely Operated Vehicle in March (n = 13) and August (n = 12) of 2010. The results did not refute a linear model between the λs index and observed density, when compared to a non-linear model, except for the August Yelloweye index. The λs index did have a better fit with observed density than CPUE for Yelloweye, but not for Quillback. Adding hook-level habitat into the λs index improved the fit for Yelloweye, but not for Quillback. Additionally, observations showed that bare hooks were mainly due to non-target species, including large invertebrates. The annual λs index for the rockfish survey was estimated under different scenarios for bare hooks and species interactions, but the trends in the λs index were robust. Trends in the λs index differed from CPUE trends in some areas. My research results cast some doubt on the assumption that for a few inshore rockfish the λs index is consistently linearly related to abundance. Caution needs to be taken in extrapolating these results to other situations, as the experiments occurred in a small area and incorporated limited seasonal and temporal variation.
HERSCHEL-HIFI spectroscopy of the intermediate mass protostar NGC7129 FIRS 2
Creators: name: Johnstone, D.
name: Fich, M.
name: McCoey, C.
name: van Kempen, T. A.
name: Fuente, A.
name: Kristensen, L. E.
name: Cernicharo, J.
name: Caselli, P.
name: Visser, R.
name: Plume, R.
name: Herczeg, G. J.
name: van Dishoeck, E. F.
name: Wampfler, S.
name: Bachiller, R.
name: Baudry, A.
name: Benedettini, M.
name: Bergin, E.
name: Benz, A. O.
name: Bjerkeli, P.
name: Blake, G.
name: Bontemps, S.
name: Braine, J.
name: Bruderer, S.
name: Codella, C.
name: Daniel, F.
name: di Giorgio, A. M.
name: Dominik, C.
name: Doty, S. D.
name: Encrenaz, P.
name: Giannini, T.
name: Goicoechea, J. R.
name: de Graauw, Th.
name: Helmich, F.
name: Herpin, F.
name: Hogerheijde, M. R.
name: Jacq, T.
name: Jørgensen, J. K.
name: Larsson, B.
name: Lis, D.
name: Liseau, R.
name: Marseille, M.
name: Melnick, G.
name: Neufeld, D.
name: Nisini, B.
name: Olberg, M.
name: Parise, B.
name: Pearson, J.
name: Risacher, C.
name: Santiago-García, J.
name: Saraceno, P.
name: Shipman, R.
name: Tafalla, M.
name: van der Tak, F.
name: Wyrowski, F.
name: Yıldız, U. A.
name: Caux, E.
name: Honingh, N.
name: Jellema, W.
name: Schieder, R.
name: Teyssier, D.
name: Whyborn, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: HERSCHEL-HIFI observations of water from the intermediate mass protostar NGC7129 FIRS 2 provide a powerful diagnostic of the physical conditions in this star formation environment. Six spectral settings, covering four H216O and two H218O lines, were observed and all but one H218O line were detected. The four H2 16 O lines discussed here share a similar morphology: a narrower, \approx 6 km/s, component centered slightly redward of the systemic velocity of NGC7129 FIRS 2 and a much broader, \approx 25 km/s component centered blueward and likely associated with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate mass protostar, and the abundance of H2O is constrained to \approx 10-7 for the outer envelope. Additionally, the presence of a narrow self-absorption component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the H2O/CO relative abundance is found to be \approx 0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.
description: 6 pages, 4 figures, accepted by A&A
Ising model with mixed boundary conditions: universal amplitude ratios
Creators: name: Izmailian, N. Sh.
name: Yeh, Yeong-Nan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the vicinity of boundaries the bulk universality class of critical phenomena splits into several boundary universality classes, depending upon whether the tendency to order in the boundary is smaller or larger than in the bulk. For Ising universality class there are five different boundary universality classes: periodic, antiperiodic, free, fixed and mixed (mixture of the last two). In this paper we present the new set of the universal amplitude ratios for the mixed boundary universality class. The results are in perfect agreement with a perturbated conformal field theory scenario proposed by Cardy \cite{cardy86}.
description: 10 pages
Diffuse large B-cell lymphoma with overexpression of cyclin e substantiates poor standard treatment response and inferior outcome
Creators: name: Tzankov, Alexandar
name: Gschwendtner, Andreas
name: Augustin, Florian
name: Fiegl, Michael
name: Obermann, Ellen C.
name: Dirnhofer, Stephan
name: Went, Philip
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 610 Medizin

description: PURPOSE: Gold standard to predict survival and stratify patients for risk-adapted therapy in diffuse large B-cell lymphoma (DLBCL) is the international prognostic index, although it does not consider the molecular heterogeneity of DLBCL. Deregulation of cyclin E (CCNE) is a strong predictor of poor prognosis in some neoplastic diseases. In tumor cells, it induces chromosomal instability with an increased rate of aneuploidy/polyploidy. EXPERIMENTAL DESIGN: We analyzed in this retrospective study the prognostic value of immunohistochemical CCNE expression on a validated tissue microarray containing 101 de novo DLBCLs and, in 9 cases, the CCNE-induced chromosomal instability as assessed by cytometry. RESULTS: Forty-six of 98 evaluable DLBCLs expressed CCNE in a mean proportion of 20 +/- 29% of tumor cells; 38 cases expressed CCNE in >/=20% of tumor cells. CCNE-positive samples were aneuploid compared with near tetraploidy in CCNE-negative cases. Multivariate analysis showed CCNE expression in >/=20% of tumor cells to be an international prognostic index-independent, Adriamycin-based treatment-independent, and BCL2-independent prognostic factor for poor disease-specific survival. CCNE expression in >/=80% of tumor cells was associated with dismal short-term prognosis. CCNE expression in >/=50% of tumor cells emerged as an independent predictive factor for standard CHOP treatment resistance. CONCLUSIONS: CCNE expression assessment is easy on paraffin-embedded tissue. The high prognostic value of CCNE expression in DLBCL may be the basis for future prospective trials. In addition, a high CCNE expression hints at the presence of a possible target for individualized cancer therapy.
Electron density fluctuations accelerate the branching of streamer discharges in air
Creators: name: Luque, A.
name: Ebert, U.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Branching is an essential element of streamer discharge dynamics but today it is understood only qualitatively. The variability and irregularity observed in branched streamer trees suggest that stochastic terms are relevant for the description of streamer branching. We here consider electron density fluctuations due to the discrete particle number as a source of stochasticity in positive streamers in air at standard temperature and pressure. We derive a quantitative estimate for the branching distance that agrees within a factor of 2 with experimental values. As branching without noise would occur later, if at all, we conclude that stochastic particle noise is relevant for streamer branching in air at atmospheric pressure.
description: 5 pages, 4 figures
Evolution of Primordial Stars Powered by Dark Matter Annihilation up to the Main-Sequence Stage
Creators: name: Hirano, Shingo
name: Umeda, Hideyuki
name: Yoshida, Naoki
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Primordial stars formed in the early universe are thought to be hosted by compact dark matter (DM) halos. If DM consists of Weakly Interacting Massive Particles (WIMPs), such stars may be powered by DM annihilation during the early phases of their evolutions. We study the pre-main sequence evolutions of the primordial star using a detailed stellar evolution code under the assumption that the annihilation of adiabatically contracted WIMPs DM within the star provides a sufficient energy to sustain the stellar equilibrium. We follow the evolution of accreting stars using several gas mass accretion rates derived from cosmological simulations. We show that the stellar mass becomes very large, up to 900 - 1000 M_sun when the star reaches the main-sequence phase for a reasonable set of model parameters such as DM particle mass and the annihilation cross section. During the dark star phase, the star expands over a thousand solar-radii, while the surface temperature remains below 10^4 K. The energy generated by nuclear reactions is not dominant during this phase. We also study models with different gas mass accretion rates and the DM particle masses. All our models for different DM particle masses pass the dark star phase. The final mass of the dark stars is essentially unchanged for DM mass of m_DM <= 10 GeV. Gravitational collapse of the massive dark stars will leave massive black holes with mass as large as 1000 M_sun in the early universe.
description: 21 pages, 14 figures, accepted to ApJ
Measurement of the energy dependence of the total photon-proton cross section at HERA
Creators: name: ZEUS Collaboration
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The energy dependence of the photon-proton total cross section, sigma-tot, was determined from ep scattering data collected with the ZEUS detector at HERA at three values of the center-of-mass energy, W, of the gamma-p system in the range 194
description: 12 pages, 5 figures submitted to Phys. Lett. B
Single-photon cooling in a wedge billiard
Creators: name: Choi, S.
name: Sundaram, B.
name: Raizen, M. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Single-Photon Cooling (SPC), noted for its potential as a versatile method for cooling a variety of atomic species, has recently been demonstrated experimentally. In this paper, we study possible ways to improve the performance of SPC by applying it to atoms trapped inside a wedge billiard. The main feature of wedge billiard for atoms, also experimentally realized recently, is that the nature of atomic trajectories within it changes from stable periodic orbit to random chaotic motion with the change in wedge angle. We find that a high cooling efficiency is possible in this system with a relatively weak dependence on the wedge angle, and that chaotic dynamics, rather than regular orbit, is more desirable for enhancing the performance of SPC.
description: Submitted for Publication. 9 pages, 6 figures
title: Leadership Development Strategy for Successors in Family Businesses
Creators: name: Stanonik, Grega
Publisher: name: TU Wien
Year: 2024
Subjects: subject: Family Business
subject: Leadership
subject: Family Business Succession
subject: Leadership Development Strategy
subject: Succession Planning
subject: Competency Development

description: Family businesses play a significant role in the global economy but they face unique challenges, particularly when it comes to leadership succession. Ensuring a smooth transition from one generation to the next is critical for the sustainability and growth of these enterprises. This research seeks to address the unique challenges and opportunities faced by family business successors and design a comprehensive leadership development program to groom them for leadership roles within their family firms. The research explores the possibilities of succession planning, the development of leadership competencies, and the delicate balance between tradition and innovation in family businesses. It then leverages these insights in combination with qualitative research to design a tailored leadership development strategy. Moreover, It aims to provide actionable recommendations not only to family business owners but also to future researchers seeking to navigate the challenging landscape of leadership development in family enterprises. This thesis aspires to offer invaluable insights into creating effective leadership pathways for successors in family businesses, thereby making the long-term sustainability and prosperity of these essential economic pillars stronger. It represents a significant contribution to the field, enriching our understanding of family business management, succession planning, and leadership development.