cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spectral Evolution of a New X-ray Transient MAXI J0556-332 Observed by MAXI, Swift, and RXTE
Creators: name: Sugizaki, Mutsumi
name: Yamaoka, Kazutaka
name: Matsuoka, Masaru
name: Kennea, Jamie A.
name: Mihara, Tatehiro
name: Hiroi, Kazuo
name: Ishikawa, Masaki
name: Isobe, Naoki
name: Kawai, Nobuyuki
name: Kimura, Masashi
name: Kitayama, Hiroki
name: Kohama, Mitsuhiro
name: Matsumura, Takanori
name: Morii, Mikio
name: Nakagawa, Yujin E.
name: Nakahira, Satoshi
name: Nakajima, Motoki
name: Negoro, Hitoshi
name: Serino, Motoko
name: Shidatsu, Megumi
name: Sootome, Tetsuya
name: Sugimori, Kousuke
name: Suwa, Fumitoshi
name: Toizumi, Takahiro
name: Tomida, Hiroshi
name: Tsuboi, Yoko
name: Tsunemi, Hiroshi
name: Ueda, Yoshihiro
name: Ueno, Shiro
name: Usui, Ryuichi
name: Yamamoto, Takayuki
name: Yamauchi, Makoto
name: Yamazaki, Kyohei
name: Yoshida, Atsumasa
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the spectral evolution of a new X-ray transient, MAXI J0556-332, observed by MAXI, Swift, and RXTE. The source was discovered on 2011 January 11 (MJD=55572) by MAXI Gas Slit Camera all-sky survey at (l,b)=(238.9deg, -25.2deg), relatively away from the Galactic plane. Swift/XRT follow-up observations identified it with a previously uncatalogued bright X-ray source and led to optical identification. For more than one year since its appearance, MAXI J0556-332 has been X-ray active, with a 2-10 keV intensity above 30 mCrab. The MAXI/GSC data revealed rapid X-ray brightening in the first five days, and a hard-to-soft transition in the meantime. For the following ~ 70 days, the 0.5-30 keV spectra, obtained by the Swift/XRT and the RXTE/PCA on an almost daily basis, show a gradual hardening, with large flux variability. These spectra are approximated by a cutoff power-law with a photon index of 0.4-1 and a high-energy exponential cutoff at 1.5-5 keV, throughout the initial 10 months where the spectral evolution is mainly represented by a change of the cutoff energy. To be more physical, the spectra are consistently explained by thermal emission from an accretion disk plus a Comptonized emission from a boundary layer around a neutron star. This supports the source identification as a neutron-star X-ray binary. The obtained spectral parameters agree with those of neutron-star X-ray binaries in the soft state, whose luminosity is higher than 1.8x10^37 erg s^-1. This suggests a source distance of >17 kpc.
description: 14 pages, 8 figures, accepted for publication in PASJ
MIRRI-ERIC as a microbial, genetics and data resources hub to advance scientific discovery
Creators: name: M. P. Melo, Ana
Publisher: name: Zenodo
Year: 2024
Subjects: Research Infrastructure
MIRR-ERIC
ESFRI Roadmap
Microbial Resources
Culture Collections
Service Provision
FAIR

description: Presentation of MIRRI-ERIC in the ECCO (European Culture Collections' Organisation) XLII Meeting "Microbe & Microbiome Management for a Better Planet". Bari, 18-20 September 2024
Anwendung von Basisfunktionen höherer Ordnung auf gekrümmten Netzelementen zur beschleunigten Analyse von EMV Problemen mit der Momentenmethode
Creators: name: Jakobus, Ulrich
name: Tonder, Johann Van
Publisher: name: Berlin : VDE-Verlag
Year: 2014
Subjects: subject: Momentenmethode
subject: Feldberechnung
subject: Rechenzeit
subject: Speicherplatz
subject: Einsparpotenzial
subject: elektromagnetische Verträglichkeit
subject: Basisfunktion
subject: beschleunigte Analyse
subject: schnelle Multipolmethode
subject: Speicherplatzbedarf
subject: Netzelement
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Dieser Beitrag befasst sich mit einer Erweiterung des kommerziellen Feldberechnungsprograms FEKO [FEKO (www.feko.info), EM Software & Systems - S.A. (Pty) Ltd, PO Box 1354, Stellenbosch, 7599, Südafrika] wo im Rahmen der Momentenmethode (MoM) und der beschleunigten Version der schnellen Multipolmethode (MLFMM = multilevel fast multipole method) Basisfunktionen höherer Ordnung auf gekrümmten Oberflächenelementen zum Einsatz kommen. Konkret werden hierarchische Basisfunktionen höherer Ordnung (HOBFs = higher order basis functions) gemäß [Roberto D. Graglia, Donald R. Wilton and Andrew F. Peterson, "Higher Order Interpolatory Vector Bases for Computational Electromagnetics," IEEE Transactions on Antennas and Propagation, Vol. AP-45, Nr. 3, S. 329-342, Mar. 1997; Roberto D. Graglia, Andrew F. Peterson and Francesco P. Andriulli, "Curl-Conforming Hierarchical Vector Bases for Triangles and Tetrahedra," IEEE Transactions on Antennas and Propagation, Vol. AP-59, Nr. 3, S. 950-959, Mar. 2011] eingeführt, die die traditionellen RWG (Rao-Wilton-Glisson) Basisfunktionen nach [Sadasiva M. Rao, Donald R. Wilton and Allen Glisson, "Electromagnetic Scattering by Surfaces of Arbitrary Shape," IEEE Transactions on Antennas and Propagation, Vol. AP-30, Nr. 3, S. 409-418, May 1982] ergänzen. Neben einer genaueren Modellierung ist das primäre Ziel die Einsparung von Rechenzeit und Speicherplatz. Im Rahmen dieses Beitrags wurden Basisfunktionen höherer Ordnung für die MoM und die MLFMM auf krummlinigen dreieckförmigen Flächenelementen zweiter Ordnung im Feldberechnungsprogramm FEKO eingeführt. Die Extraktion der Singularitäten wird auf ebenen Dreiecken tangential zu den krummlinigen Flächenelementen vollzogen. Praxisbezogene EMV Beispiele haben die Genauigkeit dieses Verfahrens sowie das daraus resultierende Einsparpotential an Netzelementen und Unbekannten gezeigt, was direkt mit dem Speicherplatzbedarf und der Rechenzeit in Verbindung steht.
Zannichellia tenuis Sibth.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: A. tenuis Sibth. (A. vulgaris With., A. capillaris SchinzetThell.) Cat. 380. Var. Hornungiana (Schur) - l: Outre-Rhone (Garns). - 2: Ob Fully (Garns). Var. tenella (Gaudin) - 2: Ob Fully (J., Garns). Lus. flavescens (Coquoz) -l: Planajeur ob Les]V[arecottes1; Leizettes1; Salantin (alles: Coquoz).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Nonadiabatic Van der Pol oscillations in molecular transport
Creators: name: Kartsev, Alexey
name: Verdozzi, Claudio
name: Stefanucci, Gianluca
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The force exerted by the electrons on the nuclei of a current-carrying molecular junction can be manipulated to engineer nanoscale mechanical systems. In the adiabatic regime a peculiarity of these forces is negative friction, responsible for Van der Pol oscillations of the nuclear coordinates. In this work we study the robustness of the Van der Pol oscillations against high-frequency bias and gate voltage. For this purpose we go beyond the adiabatic approximation and perform full Ehrenfest dynamics simulations. The numerical scheme implements a mixed quantum-classical algorithm for open systems and is capable to deal with arbitrary time-dependent driving fields. We find that the Van der Pol oscillations are extremely stable. The nonadiabatic electron dynamics distorts the trajectory in the momentum-coordinate phase space but preserves the limit cycles in an average sense. We further show that high-frequency fields change both the oscillation amplitudes and the average nuclear positions. By switching the fields off at different times one obtains cycles of different amplitudes which attain the limit cycle only after considerably long times.
description: 12 pages, 7 figures
Towards a system for sea state forecasts in the Bulgarian Black Sea coastal zone: the case of the storm of 07-08 february 2012
Creators: name: Galabov, Vasko
name: Kortcheva, Anna
name: Dimitrova, Marieta
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The paper describes the existing operational sea state forecast system of NIMH- BAS for sea state in the Black Sea and our current progress on the implementation of an additional component for the forecasts of wind waves in the Bulgarian coastal zone. Wind Waves and especially the extreme ones, occurring during severe storms are a major hazard for the coastal zone, causing significant damages to the infrastructure, threat for the human lives and also causing significant damages to the protected areas around the coast. The numerical model WAVEWATCH III is in use for wind waves forecasts for the entire Black Sea with horizontal resolution of 1/8 degree (roughly 14 kilometers), which is sufficient for the open Sea, but not enough for a detailed coastal forecast. For the purposes of the coastal forecasts and early warnings in case of severe storms we decided to implement SWAN (Simulating the Waves Near Shore)- development of TU- DELFT. In this paper we will describe the brief details about the coastal sea state forecasting system of NIMH- BAS and a case study of the storm of 07-08 February 2012, which is the severest storm in our coastal area for the last decade (and probably longer period).
description: 8 pages, presented at the conference SGEM 2012
INNOVATSION IQTISODIY KOMPETENTLIKDA RAQAMLI TRANSFORMATSIYANING TA'SIRI
Creators: name: Usanov, Zafar
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada raqamli transformatsiyaning innovatsion iqtisodiy kompetentlikka ta'siri o‘rganiladi. Raqamli texnologiyalar iqtisodiy bilimlarni yangilash zaruriyatini keltirib chiqardi va texnologik ko‘nikmalarni rivojlantirishni talab qilmoqda. Maqolada raqamli iqtisodiyot sharoitida iqtisodiy muvaffaqiyat uchun texnologik yangiliklarni joriy etish, moslashuvchanlik va bozor o‘zgarishlariga tayyorlik muhim ekanligi tahlil qilinadi.
Mechanochemical synthesis, structure and properties of lead containing alkaline earth metal fluoride solid solutions MxPb1-xF2 (M = Ca, Sr, Ba)
Creators: name: Heise, M.
name: Scholz, G.
name: Düvel, Andre
name: Heitjans, Paul
name: Kemnitz, E.
Publisher: name: Amsterdam : Elsevier
Year: 2018
Subjects: subject: Mechanochemical synthesis
subject: Solid solutions
subject: 19F MAS NMR spectroscopy
subject: Impedance spectroscopy
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The paper deals with the mechanochemical synthesis of lead containing alkaline earth metal fluoride solid solutions MxPb1-xF2 (M = Ca, Sr, Ba) by high-energy ball milling. Several metal precursors and fluorinating agents were tested for synthesizing M0.5Pb0.5F2. Metal acetates and ammonium fluoride as precursors show the most promising results and were therefore used for the formation of MxPb1-xF2 with different metal cationic ratios. The characterization of the local fluorine coordination and the crystal structure was performed by 19F MAS NMR spectroscopy and X-ray diffraction. Additional calculations of 19F chemical shifts using the superposition model allow a deeper insight into the local structure of the compounds. The fluoride ion conductivity was followed by temperature dependent DC conductivity measurements. Significantly higher conductivities were found in comparison with those of the corresponding binary fluorides. The highest values were observed for samples with high lead content M0.25Pb0.75F2, bearing in mind the much higher conductivity of PbF2 compared to MF2.
title: Regulation and measurement of oxidative stress in apoptosis
Creators: name: Curtin, James
name: Donovan , Maryanne
name: Cotter, Thomas
Publisher: name: Technological University of Dublin
Year: 2002

description: Cells are constantly generating reactive oxygen species (ROS) during aerobic metabolism. As a consequence, each cell is equipped with an extensive antioxidant defence system to combat excessive production of ROS. Oxidative stress occurs in cells when the generation of ROS overwhelms the cell's natural antioxidant defences. There is a growing consensus that oxidative stress and the redox state of a cell plays a pivotal role in regulating apoptosis, a tightly controlled form of cell death in which a cell partakes in its own demise. More recently, a role for reactive nitrogen species (RNI) as both positive and negative regulators of cell death has been established. This review describes the major sources of ROS and RNI in a cell, the control of cell death by these species and the role of antioxidants as regulators of oxidative stress and apoptosis. Finally, the various methods that can be employed in establishing a role for both ROS and RNI in apoptosis will be discussed with particular emphasis on their intracellular detection.
Hyperfine interaction in CoCl$_2$ investigated by high resolution neutron spectroscopy
Creators: name: Chatterji, Tapan
name: Frick, Bernhard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated low energy nuclear spin excitations in the layered compound CoCl$_2$ by high resolution back-scattering neutron spectroscopy. We detected inelastic peaks at $E = 1.34 \pm 0.03$ $μ$eV on both energy loss and energy sides of the central elastic peak at $T = 2$ K. The energy of the inelastic peaks decrease with temperature continuously and become zero at $T_N \approx 25$ K at which the two ielastic peaks merge with the central elastic peak. We interpret the low energy excitations to be due to the transition between hyperfine field split nuclear levels. The present data together with the data on other Co compounds show that the energy of the nuclear spin excitations of a number of compounds follow a linear relationship with the electronic magnetic moment of the Co ion whereas that of other compounds deviate appreciably from this linear behaviour. We ascribe this anomalous behaviour to the presence of unquenched orbital moments of the Co ions.
description: arXiv admin note: substantial text overlap with arXiv:1205.4099
B-physics results from Tevatron
Creators: name: Borissov, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This review summarizes the most important results in B physics obtained at the Tevatron. They include the discovery of the new B hadrons, the measurement of their masses and lifetimes, the measurement of the oscillation frequency of $\Bs$ meson, the search for its rare decay $\Bs \to μ^+ μ^-$, and the study of the CP asymmetry in decays and mixing of $B$ mesons.
description: 52 pages, 27 figures, 126 references
A Detailed Kinematic Map of Cassiopeia A's Optical Main Shell and Outer High-Velocity Ejecta
Creators: name: Milisavljevic, Dan
name: Fesen, Robert A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present three-dimensional kinematic reconstructions of optically emitting material in the young Galactic supernova remnant Cassiopeia A (Cas A). These Doppler maps have the highest spectral and spatial resolutions of any previous survey of Cas A and represent the most complete catalog of its optically emitting material to date. We confirm that the bulk of Cas A's optically bright ejecta populate a torus-like geometry tilted approximately 30 degrees with respect to the plane of the sky with a -4000 to +6000 km/s radial velocity asymmetry. Near-tangent viewing angle effects and an inhomogeneous surrounding CSM/ISM environment suggest that this geometry and velocity asymmetry may not be faithfully representative of the remnant's true 3D structure or the kinematic properties of the original explosion. The majority of the optical ejecta are arranged in several well-defined and nearly circular ring-like structures with diameters between approximately 30 arcsec (0.5 pc) and 2 arcmin (2 pc). These ejecta rings appear to be a common phenomenon of young core-collapse remnants and may be associated with post-explosion input of energy from plumes of radioactive 56Ni-rich ejecta that rise, expand, and compress non-radioactive material. Our optical survey also encompassed Cas A's faint outlying ejecta knots and exceptionally high-velocity NE and SW streams of S-rich debris often referred to as `jets'. These outer knots, which exhibit a chemical make-up suggestive of an origin deep within the progenitor star, appear to be arranged in opposing and wide-angle outflows with opening half-angles of approximately 40 degrees.
description: 15 pages, 11 figures, accepted by ApJ, associated movie files can be found at https://www.cfa.harvard.edu/~dmilisav/
title: Siedlungshistorische und paläoethnologische Untersuchungen im Wadi Tidoua, Messak-Mellet, Zentralsahara. Behausungsstruktur, Artefaktverteilung und Geräteformen eines aterienzeitlichen Fundplatzes
Creators: name: Fiedler, Lutz
name: Lutz, Gabriele
name: Lutz, Rüdiger
name: Quehl, Horst
Publisher: name: University Library Heidelberg
Year: 2015

description: Im Südwesten Libyens befindet sich in den MessakBergen der Fundplatz A9922
im Wadi Tidoua, dessen Felswände mit zahlreichen steinzeitlichen Gravierungen versehen sind. Die Oberfläche des AterienFundgeländes
A9922 wurde in einem Ausschnitt von 25 x 15 m kartiert. Wir zählten dabei
13.367 Artefakte. Deren Verteilung hat die höchste Konzentration in der Südostecke unserer Fläche. Eine kreisförmige Steinsetzung von etwa 3 x 4 m befindet sich darin im Westen. Diese Struktur hat nach Osten hin einen Eingangsbereich. Bis auf wenige unzerbrochene Werkzeuge befinden sich keine Steine im Inneren. Man kann diesen Befund als Rest einer Behausung interpretieren. Die Steinwerkzeuge gehören einheitlich zum Aterien. Sie verteilen sich relativ gleichmäßig über den Fundplatz. Dennoch lassen
sich bestimmte Aktivitätszonen erkennen, vor allem ein Areal mit Schabern, großen Kratzern und messerähnlichen Werkzeugen im Osten. Das Spektrum des Artefaktinventars unterscheidet sich von solchen anderer Aterienfundstellen in den nahegelegenen Dünengebieten von Ubari und Murzuk. Auf unserem Platz gibt es mehr Kratzer, einfache Schaber, weniger Levalloisklingen und keine LaQuinaSchaber; dort gibt es mehr Levalloisklingen, gekerbte und eingeschnürte Klingen und Kratzer vom AurignacienTyp. Im Spektrum von A9922 erscheinen neben gewöhnlichen AterienFormen die KostenkiTechnik, Pointes fioliacees ä face plane (JerzmanoviceSpitzen), Blattspitzen und Keilmesser. Es gibt einen Stein mit einer großen eingepickten Mulde sowie einen flachen Klopfstein mit einer eingeritzten Darstellung. Wir halten es deshalb für möglich, daß ein Teil der frühen Felsbilder auch von AterienMenschen geschaffen worden sein kann. Wir interpretieren die von uns zuvor (1986 und 1988) untersuchten, über 10m langen und WestOst orientierten Windschirme des Aterien als Sommerbehausungen für größere Menschengruppen. Die geschlossene Behausung von A9922 wurde dagegen von einer kleinen Gruppe errichtet, die in der kälteren Jahreszeit im Wadi Tidoua war. Die topographische Lage des Fundplatzes und die Zusammensetzung des Artefaktspektrums sprechen für einen Jagdund Zerlegungsplatz. Wir denken, daß unterschiedliche Gerätespektren mit unterschiedlichen topographischen Situationen, soziokulturellen Anlässen und Versorgungssystemen zu tun haben. Sie sind jeweils Ausdruck eines übergeordneten technokulturellen Repertoires.
Hidden symmetries of deformed oscillators
Creators: name: Krivonos, Sergey
name: Lechtenfeld, Olaf
name: Sorin, Alexander
Publisher: name: Amsterdam : Elsevier B.V.
Year: 2017
Subjects: subject: Lie algebra
subject: Schrödinger
subject: oscillator
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We associate with each simple Lie algebra a system of second-order differential equations invariant under a non-compact real form of the corresponding Lie group. In the limit of a contraction to a Schrödinger algebra, these equations reduce to a system of ordinary harmonic oscillators. We provide two clarifying examples of such deformed oscillators: one system invariant under SO(2,3) transformations, and another system featuring G2(2) symmetry. The construction of invariant actions requires adding semi-dynamical degrees of freedom; we illustrate the algorithm with the two examples mentioned.
Effizientes Breitband-Netzwerkmodell zur Simulation von Spannungsversorgungsstrukturen auf Leiterplatten
Creators: name: Mantzke, Andreas
name: Leone, Marco
name: Friedrich, M.
Publisher: name: Berlin : VDE-Verlag
Year: 2014
Subjects: subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Ein neuartiges, effizientes und stabiles Netzwerkmodell zur Simulation von Parallelplattenstrukturen beliebiger Geometrie wurde entwickelt. Es basiert auf einer neuen, schnell konvergierenden Lösung für die Impedanzparameter. Das Netzwerk beinhaltet die Plattenkapazität, die statischen Eigen- und Gegeninduktivitäten sowie modale Schwingkreise, deren Anzahl über die erforderliche Frequenzbandbreite abgeschätzt werden kann. Zur Berechnung der Netzwerkelemente dient ein neuartiger numerischer Finite-Differenzen-Ansatz, der mit einer homogenen Vernetzung auskommt, die lediglich an die kürzeste zu betrachtende Wellenlänge anzupassen ist. Für eine gegebene Plattengeometrie kann damit eine beliebige Anzahl und Anordnung der Ports ohne Neuvernetzung analysiert werden. Zeit- und Frequenzbereichsrechnungen können mit herkömmlicher Schaltungssimulation bei beliebiger Beschaltung durchgeführt werden (linear/nichtlinear, aktiv/passiv). Die Validierung des vorgestellten Netzwerkmodells mittels 3D-Vollwellensimulation zeigt eine sehr gute Übereinstimmung, bei erheblich geringerem Modellierungs- und Rechenaufwand. Damit eignet sich der entwickelte Netzwerkmodell besonders gut für die praktische Anwendung, wie z.B. zur Optimierung von Spannungsversorgungslagen auf mehrlagigen Leiterplatten.
LISA phasemeter development: Advanced prototyping
Creators: name: Bykov, Iouri
name: Delgado, Juan Jose Esteban
name: Marín, Antonio Francisco Garcia
name: Heinzel, Gerhard
name: Danzmann, Karsten
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2009
Subjects: subject: LISA
subject: ADC
subject: DAC
subject: FPGA (field programmable gate array)
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present the status of our investigations on the LISA Phasemeter. The new prototype is based on a custom-designed breadboard with four high-speed ADC and two DAC channels, extended readout capabilities and a large FPGA (field programmable gate array). The required main functionalities and performance of the prototype have been demonstrated in laboratory conditions. © 2009 IOP Publishing Ltd.
A Novel Measure of Edge Centrality in Social Networks
Creators: name: De Meo, Pasquale
name: Ferrara, Emilio
name: Fiumara, Giacomo
name: Ricciardello, Angela
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Data Structures and Algorithms (cs.DS)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The problem of assigning centrality values to nodes and edges in graphs has been widely investigated during last years. Recently, a novel measure of node centrality has been proposed, called k-path centrality index, which is based on the propagation of messages inside a network along paths consisting of at most k edges. On the other hand, the importance of computing the centrality of edges has been put into evidence since 1970's by Anthonisse and, subsequently by Girvan and Newman. In this work we propose the generalization of the concept of k-path centrality by defining the k-path edge centrality, a measure of centrality introduced to compute the importance of edges. We provide an efficient algorithm, running in O(k m), being m the number of edges in the graph. Thus, our technique is feasible for large scale network analysis. Finally, the performance of our algorithm is analyzed, discussing the results obtained against large online social network datasets.
description: 28 pages, 5 figures
Comparing satellite- to ground-based automated and manual cloud coverage observations – a case study
Creators: name: Werkmeister, Astrid
name: Lockhoff, M.
name: Schrempf, Michael
name: Tohsing, Korntip
name: Liley, B.
name: Seckmeyer, Gunther
Publisher: name: Göttingen : Copernicus
Year: 2015
Subjects: subject: AVHRR Data
subject: Clear-Sky
subject: Part I
subject: CM-SAF
subject: Classification
subject: Validation
subject: Imagery
subject: Radiation
subject: Surface
subject: Dynamische Schwelle
subject: AVHRR-Daten
subject: klarer Himmel
subject: Klassifizierung
subject: Validierung
subject: Bild
subject: Strahlung
subject: Oberfläche
subject: Dynamic Thresholds
subject: AVHRR
subject: Strahlung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: In this case study we compare cloud fractional cover measured by radiometers on polar satellites (AVHRR) and on one geostationary satellite (SEVIRI) to ground-based manual (SYNOP) and automated observations by a cloud camera (Hemispherical Sky Imager, HSI). These observations took place in Hannover, Germany, and in Lauder, New Zealand, over time frames of 3 and 2 months, respectively. Daily mean comparisons between satellite derivations and the ground-based HSI found the deviation to be 6 14% for AVHRR and 8 16% for SEVIRI, which can be considered satisfactory. AVHRR’s instantaneous differences are smaller (2 22 %) than instantaneous SEVIRI cloud fraction estimates (8 29 %) when compared to HSI due to resolution and scenery effect issues. All spaceborne observations show a very good skill in detecting completely overcast skies (cloud cover 6 oktas) with probabilities between 92 and 94% and false alarm rates between 21 and 29% for AVHRR and SEVIRI in Hannover, Germany. In the case of a clear sky (cloud cover lower than 3 oktas) we find good skill with detection probabilities between 72 and 76 %. We find poor skill, however, whenever broken clouds occur (probability of detection is 32% for AVHRR and 12% for SEVIRI in Hannover, Germany). In order to better understand these discrepancies we analyze the influence of algorithm features on the satellite-based data. We find that the differences between SEVIRI and HSI cloud fractional cover (CFC) decrease (from a bias of 8 to almost 0 %) with decreasing number of spatially averaged pixels and decreasing index which determines the cloud coverage in each “cloud-contaminated” pixel of the binary map. We conclude that window size and index need to be adjusted in order to improve instantaneous SEVIRI and AVHRR estimates. Due to its automated operation and its spatial, temporal and spectral resolution, we recommend as well that more automated ground-based instruments in the form of cloud cameras should be installed as they cover larger areas of the sky than other automated ground-based instruments. These cameras could be an essential supplement to SYNOP observation as they cover the same spectral wavelengths as the human eye.
New design of electrostatic mirror actuators for application in high-precision interferometry
Creators: name: Wittel, H.
name: Hild, Stefan
name: Bergmann, Gerald
name: Danzmann, Karsten
name: Strain, Kenneth A.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2015
Subjects: subject: interferometry
subject: actuator
subject: electrostatic drive
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We describe a new geometry for electrostatic actuators to be used in sensitive laser interferometers, suited for prototype and table top experiments related to gravitational wave detection with mirrors of 100 g or less. The arrangement consists of two plates at the sides of the mirror (test mass), and therefore does not reduce its clear aperture as a conventional electrostatic drive (ESD) would do. Using the sample case of the AEI-10 m prototype interferometer, we investigate the actuation range and the influence of the relative misalignment of the ESD plates with respect to the test mass. We find that in the case of the AEI-10 m prototype interferometer, this new kind of ESD could provide a range of 0.28 mu m when operated at a voltage of 1 kV. In addition, the geometry presented is shown to provide a reduction factor of about 100 in the magnitude of the actuator motion coupling to the test mass displacement. We show that therefore in the specific case of the AEI-10 m interferometer, it is possible to mount the ESD actuators directly on the optical table without spoiling the seismic isolation performance of the triple stage suspension of the main test masses.
IMPACT OF THE COVID-19 CRISIS ON FIRM PERFORMANCE: AN EMPIRICAL INVESTIGATION IN THE TUNISIAN STOCK MARKET
Creators: name: INES BEN FLAH
name: AZHAAR LAJMI
Publisher: name: Zenodo
Year: 2024
Subjects: Firm Performance, COVID-19, Size, Capital Structure, Conjuncture, Risk Equity, Free Cash-Flow.

description: Abstract

Using financial data from Tunisian companies listed on the Tunis Stock Exchange (TSE), we study the impact of COVID-19 on firm performance. We show that COVID-19 has a negative impact on performance of the company. The empirical study uses panel data regression analysis, to examine data from 34 companies listed on the Tunis Stock Exchange during the period from 2016 to 2021. The results highlight the negative impact of the COVID-19 health crisis on company performance as approached by three measures (ROA, ROE and Stock Market Performance).

Jel Classification: G30, I18, L21, L25.
Interferometry for LISA and LISA pathfinder
Creators: name: García Marín, A.F.
name: Heinzel, Gerhard
name: Danzmann, Karsten
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2007
Subjects: subject: laser
subject: LISA
subject: NASA
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The Laser Interferometer Space Antenna (LISA) is a joint ESA-NASA mission designed to observe gravitational waves in the frequency range between 10 -4 to 1 Hz, where ground-based detectors are limited by terrestrial noise. Sources in this frequency range include supermassive black holes and galactic binary stars. LISA consists of three identical spacecraft separated by 5 million kilometers carrying a total of six free flying proof masses in heliocentric drag-free orbit. The fluctuations in separation between two test masses located in different satellites will be measured by laser interferometry with picometer precision. LISA Pathfinder is a technology demonstration mission for LISA consisting of only two test masses in one single satellite. It will be launched in 2009, five years before LISA. We provide here an overview of the development of LISA and LISA Pathfinder with particular emphasis on the interferometry.
ENHANCING MIRNA THERAPEUTICS USING LIGAND CONJUGATED AND CHEMICALLY MODIFIED TUMOR SUPPRESSIVE MIRNAS
Creators: name: Abdelaal, Ahmed M
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Oncology and carcinogenesis not elsewhere classified

description: miRNAs therapeutics have emerged as a potential cancer therapeutics due to their unique ability to target multiple genes, allowing a single miRNA to act as a multi-drug cocktail. However, toxicity associated with current delivery vehicles as well as the sensitivity of the miRNA to serum nucleases are critical hurdles that stand against their clinical utility. Ligand-targeted delivery approaches such as small molecules, aptamers, antibodies or glycoconjugates provide a promising strategy to achieve specific delivery of the therapeutic cargo to the intended targeted cells without any toxicity. We hypothesized that combining both ligand targeted approach along with modifying the miRNA would provide a perfect delivery system which does not only achieve specific delivery but also reduce the therapeutic dose. The data presented in this dissertation shows (i) that miR-34a delivered using a combination of targeting ligand (DUPA) and an endosomal escape agent (nigericin) enables selective delivery of miR-34a to prostate cancer cells, (ii) that the use of full chemical modification approach enhances miR-34a stability and activity both in vitro and in vivo. Overall, these results provide an advancement in the miRNA delivery field and will help the development of miRNA based therapeutics against cancer.
Reply to Comment on 'Species-selective lattice launch for precision atom interferometry'
Creators: name: Chamakhi, R.
name: Ahlers, Holger
name: Telmini, M.
name: Schubert, C.
name: Rasel, Ernst Maria
name: Gaaloul, N.
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: atom interferometry
subject: equivalence principle
subject: atomic fountains
subject: cold atoms
subject: Bose–Einstein condensates
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Reply to: Alexander D Cronin and Raisa Trubko: Comment on 'Species-selective lattice launch for precision atom interferometry'. In: New Journal of Physics 18 (2016), Nr. 11, 118001. DOI: https://doi.org/10.1088/1367-2630/18/11/118001
Existence, uniqueness and analyticity of space-periodic solutions to the regularised long-wave equation
Creators: name: Chertovskih, R.
name: Chian, A. C. -L.
name: Podvigina, O.
name: Rempel, E.
name: Zheligovsky, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Analysis of PDEs (math.AP)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider space-periodic evolutionary and travelling-wave solutions to the regularised long-wave equation (RLWE) with damping and forcing. We establish existence, uniqueness and smoothness of the evolutionary solutions for smooth initial conditions, and global in time spatial analyticity of such solutions for analytical initial conditions. The width of the analyticity strip decays at most polynomially. We prove existence of travelling-wave solutions and uniqueness of travelling waves of a sufficiently small norm. The importance of damping is demonstrated by showing that the problem of finding travelling-wave solutions to the undamped RLWE is not well-posed. Finally, we demonstrate the asymptotic convergence of the power series expansion of travelling waves for a weak forcing.
description: 29 pp., 4 figures, 44 references
Helicity amplitudes for photoexcitation of nucleon resonances off neutrons
Creators: name: Anisovich, A. V.
name: Burkert, V.
name: Klempt, E.
name: Nikonov, V. A.
name: Sarantsev, A. V.
name: Thoma, U.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The helicity amplitudes $A^{1/2}_n$ and $A^{3/2}_n$ for the photoexcitation of nucleon resonances off neutrons are determined in a multi-channel partial-wave analysis.
description: submitted to EPJ A
title: Biblioteka z wyobraźnią. Prace konkursowe studentów studiów magisterskich Zakładu Projektowania Wnętrz w Instytucie Architektury i Urbanistyki Wydziału Budownictwa, Architektury i Inżynierii Środowiska Politechniki Łódzkiej
Creators: name: Szczepaniak, Jolanta
name: Skubała, Elżbieta
Publisher: name: Wydawnictwo Politechniki Łódzkiej
Year: 2019

description: Celem konkursu „Biblioteka z wyobraźnią” było nadanie nowego oblicza tradycyjnym wnętrzom Biblioteki oraz wprowadzenie nowych funkcji wskazanych przez uczestników konkursu. Organizatorzy liczyli na nowatorskie spojrzenie studentów Wydziału Budownictwa i Architektury i ciekawe rozwiązania, które przełożą się na wyższy komfort dla pracowników oraz użytkowników Biblioteki. Do konkursu ”Biblioteka z wyobraźnią” na projekt nowej aranżacji przestrzeni bibliotecznej I i III piętra zostało zgłoszonych 29 prac. Album jest prezentacją wszystkich zgłoszonych projektów konkursowych.
Transit observations of the Hot Jupiter HD 189733b at X-ray wavelengths
Creators: name: Poppenhaeger, K.
name: Schmitt, J. H. M. M.
name: Wolk, S. 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: We present new X-ray observations obtained with Chandra ACIS-S of the HD 189733 system, consisting of a K-type star orbited by a transiting Hot Jupiter and an M-type stellar companion. We report a detection of the planetary transit in soft X-rays with a significantly larger transit depth than observed in the optical. The X-ray data favor a transit depth of 6-8%, versus a broadband optical transit depth of 2.41%. While we are able to exclude several possible stellar origins for this deep transit, additional observations will be necessary to fully exclude the possibility that coronal inhomogeneities influence the result. From the available data, we interpret the deep X-ray transit to be caused by a thin outer planetary atmosphere which is transparent at optical wavelengths, but dense enough to be opaque to X-rays. The X-ray radius appears to be larger than the radius observed at far-UV wavelengths, most likely due to high temperatures in the outer atmosphere at which hydrogen is mostly ionized. We furthermore detect the stellar companion HD 189733B in X-rays for the first time with an X-ray luminosity of log LX = 26.67 erg/s. We show that the magnetic activity level of the companion is at odds with the activity level observed for the planet-hosting primary. The discrepancy may be caused by tidal interaction between the Hot Jupiter and its host star.
description: 15 pages, accepted for publication in The Astrophysical Journal
title: An Evaluation of MIRU-VNTR Analysis and Spoligotyping for Genotyping of M. Bovis Isolates and a Comparison with RFLP Typing
Creators: name: McLernon, James
name: Costello, Eamon
name: Flynn, Orla
name: Madigan, Gillian
name: Ryan, Fergus
Publisher: name: Technological University of Dublin
Year: 2009

description: Common strain typing methods for differentiation of Mycobacterium bovis isolates include restriction endonuclease analysis (REA), restriction fragment length polymorphism (RFLP) analysis, spoligotyping and more recently, mycobacterial interspersed repetitive unit-variable-number tandem repeat (MIRU-VNTR) typing. Strain typing of Mycobacterium bovis isolates based on the variable-number tandem repeats of mycobacterial interspersed repetitive units (MIRU-VNTR) and on spoligotyping was evaluated in this study and these typing methods were compared with restriction fragment length polymorphism (RFLP) typing. A total of 386 M. bovis isolates from cattle, badgers and deer in the Republic of Ireland that had previously been typed by IS6110, polymorphic GC-rich sequence (PGRS) and direct repeat (DR) RFLP were included in the study. Spoligotyping and analysis of six VNTR loci (2163a, 2163b, 2165, 4052, 2996 and 1895) was performed on the samples. RFLP was the method that gave the greatest differentiation of strains with a Hunter Gaston discriminatory index (HGDI) of 0.927, the HGDI recorded for MIRU-VNTR was marginally lower at 0.918 and spoligotyping was the least discriminatory method with a HGDI of 0.7. Spoligotype SB0140 represented approximately 50% of the isolates. Within the group of isolates represented by SB0140 there was a much lower level of concordance between RFLP and MIRU-VNTR typing compared to groups represented by other spoligotypes. A combination of spoligotyping and MIRU-VNTR typing offered advantages over MIRU-VNTR typing alone. In a combined spoligotyping and MIRU-VNTR typing protocol the number of VNTR loci could be reduced to four (2163a, 2163b 2165 and 4052) while maintaining a high level of strain differentiation.
title: On the accurate resolution of hydraulic jumps in Open‐FOAM: Measurement techniques for the study of hydraulic jumps
Creators: name: López Castaño, Santiago
name: Verelst, Kristof
name: Van Hoydonck, Wim
Publisher: name: Flanders Hydraulics
Year: 2024

description: This report forms part of the project “On the accurate simulation of hydraulic jumps using OpenFOAM”, where CFD analyses and calibrations are conducted for the study of classical and sloped hydraulic jumps. Complementary physical experiments are conducted in an effort to collect fine‐grained data that could be used for verifying the numerical experiments. However, the development of PIV and LiDAR techniques is the primary objective of this report and not the presentation of a quantitative analysis for the experiments conducted. Following reports will detail the results obtained both in laboratory and numerical settings.In the current study, the development of several techniques for the processing of images in PIV and the cleaning of LiDAR measurements are presented. Experimental campaigns are conducted in FHR, where the measurements conducted present problems that may be alleviated by the aforementioned techniques. Such techniques come as a result trial‐and‐error and from the revision of existing literature on subjects related to computer vision and statistical data analysis. Here it is intended to document the solutions to the different problems encountered during the experiments and to serve as a precursor for more accurate measurements. Development of software for PIV and LiDAR measurements is still underway, including the techniques discussed here.
description: Title : FH reports. Flanders Hydraulics: Antwerp.
Volume : 20_035_1
Issue :
Pagination : VIII, 20
On spectral method in the axial channeling theory
Creators: name: Shul'ga, N. F.
name: Syshchenko, V. V.
name: Neryabova, V. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantization of the transverse motion energy in the continuous potentials of atomic strings and planes can take place under passage of fast charged particles through crystals. The energy levels for electron moving in axial channeling regime in a system of parallel atomic strings (for instance, [110] strings of a silicon crystal) are found in this work for the electron energy of order of several tens of MeV, when a total number of energy levels becomes large (up to several hundreds). High resolution of the spectral method used for energy level search has been demonstrated. Hence this method could be useful for investigation of quantum chaos problem.
description: 11 pages, 4 figures, presented on the conference "Channeling-2012", 23-28 September 2012 Alghero, Sardegna, Italy; accepted for publication in Nuclear Instruments and Methods B
Functional renormalization-group approach to decaying turbulence
Creators: name: Fedorenko, Andrei A.
name: Doussal, Pierre Le
name: Wiese, Kay Joerg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We reconsider the functional renormalization-group (FRG) approach to decaying Burgers turbulence, and extend it to decaying Navier-Stokes and Surface-Quasi-Geostrophic turbulence. The method is based on a renormalized small-time expansion, equivalent to a loop expansion, and naturally produces a dissipative anomaly and a cascade after a finite time. We explicitly calculate and analyze the one-loop FRG equations in the zero-viscosity limit as a function of the dimension. For Burgers they reproduce the FRG equation obtained in the context of random manifolds, extending previous results of one of us. Breakdown of energy conservation due to shocks and the appearance of a direct energy cascade corresponds to failure of dimensional reduction in the context of disordered systems. For Navier-Stokes in three dimensions, the velocity-velocity correlation function acquires a linear dependence on the distance, zeta_2=1, in the inertial range, instead of Kolmogorov's zeta_2=2/3; however the possibility remains for corrections at two- or higher-loop order. In two dimensions, we obtain a numerical solution which conserves energy and exhibits an inverse cascade, with explicit analytical results both for large and small distances, in agreement with the scaling proposed by Batchelor. In large dimensions, the one-loop FRG equation for Navier-Stokes converges to that of Burgers.
description: 39 pages, 25 figures
Biological, ecological, and conservational study of Kuhl's bat (Pipistrellus kuhlii) from Unizah province, Saudi Arabia
Creators: name: Alagaili, Abdulaziz N.
Publisher: name: Zenodo
Year: 2008
Subjects: B-Lymphocytes
Bone Marrow Transplantation
DNA
Graft vs Host Reaction
Humans
Hyperplasia
Immunoglobulin Isotypes
Lymph Nodes
Lymphoid Tissue
Lymphoma
Plasma Cells
Transplantation, Homologous
Biodiversity
Mammalia
Chiroptera
Chordata
Animalia
bats
bat

description: (Uploaded by Plazi for the Bat Literature Project) No abstract provided.
A Cramér moderate deviation theorem for Hotelling's $T^2$-statistic with applications to global tests
Creators: name: Liu, Weidong
name: Shao, Qi-Man
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: A Cramer moderate deviation theorem for Hotelling's $T^2$-statistic is proved under a finite $(3+δ)$th moment. The result is applied to large scale tests on the equality of mean vectors and is shown that the number of tests can be as large as $e^{o(n^{1/3})}$ before the chi-squared distribution calibration becomes inaccurate. As an application of the moderate deviation results, a global test on the equality of m mean vectors based on the maximum of Hotelling's $T^2$-statistics is developed and its asymptotic null distribution is shown to be an extreme value type I distribution. A novel intermediate approximation to the null distribution is proposed to improve the slow convergence rate of the extreme distribution approximation. Numerical studies show that the new test procedure works well even for a small sample size and performs favorably in analyzing a breast cancer dataset.
description: Published in at http://dx.doi.org/10.1214/12-AOS1082 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Evidence for effective mass reduction in GaAs/AlGaAs quantum wells
Creators: name: Hatke, A. T.
name: Zudov, M. A.
name: Watson, J. D.
name: Manfra, M. J.
name: Pfeiffer, L. N.
name: West, K. W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have performed microwave photoresistance measurements in high mobility GaAs/AlGaAs quantum wells and investigated the value of the effective mass. Surprisingly, the effective mass, obtained from the period of microwave-induced resistance oscillations, is found to be about 12% lower than the band mass in GaAs, $\mb$. This finding provides strong evidence for electron-electron interactions which can be probed by microwave photoresistance in very high Landau levels. In contrast, the measured magnetoplasmon dispersion revealed an effective mass which is close to $\mb$, in accord with previous studies.
Carex fragilis
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G. fragilis (L.) Pal. Cat. XLIXund400. Keine Fundorte bekannt.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556