julilili42/papers huggingface dataset:
Modelling time variation of gravity gradients due to water level fluctuations
2004-01-01

The water level fluctuations of the Danube River in Budapest during the great flood in 2002 were recorded. The 3D model of the river bed allowed us to build an accurate polyhedral model of the time variation of mass changes of the flood. This mass density variation model made it possible to compute and compare time variations of various gravity field functionals. Gravity and full gravity gradient tensor changes were computed on a regular grid for the model area and these changes were compared with accuracies attainable for gravity measurements. This way we were able to evaluate which kind of gravity field parameter is more suitable for detecting gravity field variations due to near-site mass changes. Gravity changes were also compared with actual gravity field measurements made during the flood with two LCR gravimeters. We studied also the possibility of predicting gravity changes from certain combinations of measured gravity gradients where no mass variation model is available. This latter technique may be relevant in the future to support absolute gravity measurements by detecting the effect of local gravity field changes through repeated gravity gradient measurements.
The Miller scheme in semigroup theory
2004-01-01

In this paper we apply a set-up introduced by R. K. Miller to transform a linear, inhomogeneous Cauchy problem for the generator of a semigroup on a Banach space into a homogeneous one for a matrix operator, which is the generator of a semigroup on a suitable product space. By using restriction theorems and extrapolation spaces we obtain new results for the inhomogeneous Cauchy problem for Hille-Yosida operators in Favard spaces.
On the Use of Structured P2P Indexing Mechanisms in Mobile Ad-Hoc Scenarios
2004-01-01

Recently, Distributed Hash Tables evolved to a preferred approach for decentralized data management in widely distributed systems. Due to their crucial characteristics -- namely scalability, flexibility, and resilience -- they are quite interesting for being applied in ad-hoc networks. But, there are plenty of open questions concerning the applicability of Distributed Hash Tables in mobile ad-hoc scenarios: Do new problems arise when both technologies are used together? -- Are there any synergy effects when both technologies are combined? -- Are the results and assumptions, made for the infrastructural Internet, still true if a mobile ad-hoc network is used instead? -- In this paper, we discuss these and further questions and offer some solutions for using Distributed Hash Tables in ad-hoc networks.
Two-Pion Production in Proton-Proton Collisions
2004-01-01

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation M. Bashkanov, S. Abdel‐Samad, K.‐Th. Brinkmann, H. Calén, F. Cappellaro, H. Clement, L. Demiroers, E. Doroshkevich, S. Dshemuchadse, C. Ekström, A. Erhardt, W. Eyrich, K. Fransson, H. Freiesleben, M. Fritsch, A. Gillitzer, L. Gustafsson, B. Höistad, M. Jacewicz, T. Johansson, L. Karsch, S. Keleta, K. Kilian, I. Koch, J. Kress, E. Kuhlmann, S. Kullander, A. Kupsc, S. Marcello, P. Marciniewski, R. Meier, K. Möller, B. Morosov, H. P. Morsch, C. Pauly, Y. Petukhov, E. Roderburg, P. Schönmeier, W. Schröder, M. Schulte‐Wissermann, W. Scobel, T. Sefzick, T. Skorodko, J. Stepaniak, G. J. Wagner, M. Wagner, U. Wiedner, P. Wintz, P. Wüstner, J. Zabierowski, J. Zlomanczuk, P. Zupranski, CELSIUS‐WASA Collaboration, COSY‐TOF Collaboration; Two‐Pion Production in Proton‐Proton Collisions. AIP Conf. Proc. 30 August 2004; 717 (1): 241–244. https://doi.org/10.1063/1.1799710 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Applications of Superconductivity
2004-01-01

This chapter contains sections titled: Superconducting Magnetic Coils Superconducting Permanent Magnets Applications of Superconducting Magnets Superconductors for Power Transmission: Cables, Transformers, and Current-Limiting Devices Superconducting Resonators and Filters Superconducting Detectors Superconductors in Microelectronics
Mobile Agents: A Construction Kit for Mobile Device Applications.
2004-01-01

Mobile Agents are a well-known programming paradigm nowadays. There is a multitude of research concerning Mobile Agent Systems with emphasize on agent coordination, agent languages and agent migration technology. On the one hand, it is often argued, that Mobile Agents are well-suited for the use in the Internet and especially with Mobile Devices and roaming users. On the other hand, there are only few publications describing the actual implementation of a Mobile Agent System for Mobile Devices. In this paper we present our implementation of the Mobile Agent System Okeanos for the use in mobile environments with emphasize in agent routing and forwarding.
Multisite spectroscopic and photometric observations of the pulsating sdB star PG 1605+072
2004-01-01

Abstract We present the first results from the MultiSite Spectroscopic Telescope (MSST) observations of the sdBV star PG 1605+072. Pulsating sdB stars (V361 Hya stars) offer the chance to gain new insights into the formation and evolution of extreme Horizontal Branch stars using the tools of asteroseismology. PG 1605+072 is an outstanding object in its class, with the richest frequency spectrum, the longest periods, and the largest variations. The MSST campaign took place in 2002 May/June and we present here the massive data set, made up of 399 hr of photometry and 151 hr of spectroscopy. The overall aims of the project are to examine light/velocity amplitude ratios and phase differences, changes in equivalent width/line index, and λ -dependence of photometric amplitudes, and to use these properties for mode identification.
The quasar 3C 273 observed by XMM-Newton and RXTE
2004-01-01

XMM–Newton has observed the quasar 3C 273 several times between 2000 June and 2003 January. Two simultaneous observations using NASA’s Rossi X–ray Timing Explorer (PCA) enables the comparison of the high energy part (2.5–10 keV) of the EPIC spectra with an independent instrument. The spectral parameters are in good agreement between the two satellites. RXTE fluxes are about 30% higher than the XMM EPIC fluxes. The variability of the high energy component (>2.5 keV) is presented. The high energy component is well described by a single power law model with indices between 1.60-1.79. The individual observations show no evidence for either a narrow or a broad iron line.
Observation of the AXP 4U 0142+61 with XMM-Newton
2004-01-01

We present results of a recent observation with the EPIC cameras on XMMNewton of the anomalous X-ray pulsar 4U 0142+61 which was performed on 2003 January 24. The object belongs to a small class of pulsars with very soft spectra and spin periods around 10 seconds. These objects often were debated to be powered either by a decaying strong magnetic field or by accretion from a residual disk. Therefore, we tried to look for cyclotron lines in the X-ray band resulting from strong magnetic fields. The observation was done in EPIC pn small window mode and for both MOS in timing mode. Data from all detectors can be well described by a black body plus power law spectral model, with kTBB = 0.398(7) keV and Γ = 3.71(6). These results agree with the last observation by Chandra. No evidence for additional spectral features like cyclotron lines was found. The flux of ≈ 5.1 · 10erg seccm (2 − 10 keV) is consistent with previous observations. A period search for this object using the method of epoch folding resulted in a period of 8.6886(3) sec. 1. The Anomalous X-Ray Pulsar 4U 0142+61 Anomalous X-Ray pulsars are a small group of objects which have in common a spin period in the range of 6 − 12 sec with long term spin down of Ṗ/P ≈ 1 × 10 [s]. They also have a characteristic soft spectrum (Γ ≈ 3) and low luminosity compared to High Mass X-ray Binaries (Israel et al. 2002). No evidence for a binary companion star is established. Searches for an optical counterpart rule out bright O/B stars. Send offprint requests to: E. Gohler, goehler@astro.uni-tuebingen.de 0.3−1.3keV 0 2 0.042 0.044 0.046 0.048 0.050 0.052
Fundamental Properties of Superconductors
2004-01-01

This chapter contains sections titled: The Vanishing of the Electrical Resistance Ideal Diamagnetism, Flux Lines, and Flux Quantization Flux Quantization in a Superconducting Ring Superconductivity: A Macroscopic Quantum Phenomenon Quantum Interference
Superconducting Elements, Alloys, and Compounds
2004-01-01

This chapter contains sections titled: Conventional and Unconventional Superconductors Superconducting Elements Superconducting Alloys and Metallic Compounds Fullerides Chevrel Phases and Boron Carbides Heavy-Fermion Superconductors Natural and Artificial Layered Superconductors The Superconducting Oxides Organic Superconductors Superconductivity Due to the Field Effect
Activity of the lipoxygenase inhibitor 1-phenyl-3-pyrazolidinone (phenidone) and derivatives on the expression of adhesion molecules on human umbilical vascular endothelial cells
2004-01-01

on Intensive Care and Emergency Medicine seal is maintained by gentle pressure on the TT keeping the cuff pressing on the vocal cords.During percutaneous tracheostomy the bougie remains in the trachea.When ventilation through the tracheostomy tube (cuff inflated) is confirmed, the TT and bougie are withdrawn.Throughout the procedure, if ventilation difficulties occur, the TT can be easily re-inserted using the bougie as a guide.Results Three different bougies were used: types (number used) were Eschmann (29), size 10 Portex disposable (four) and size 12 Portex disposable (13).Three patients were trauma cases: a neutral cervical position was maintained.In 33 cases the Blue Rhino dilator and in 12 cases the Ultra-Perc (White Rhino) dilator was used.One case was a serial dilator (see later). ConclusionThe bougie for airway control for percutaneous tracheostomy was associated with zero hypoxic episodes in 46 cases.Minor bougie damage in two cases caused no problems.Other complications seen were either minor or unlikely to be due to the bougie. P3Percutaneous dilational tracheostomy in critically ill patients: progressive vs single dilatation techniques
Josephson Junctions and Their Properties
2004-01-01

This chapter contains sections titled: Current Transport Across Interfaces in a Superconductor The RCSJ Model Josephson Junctions Under Microwave Irradiation Vortices in Long Josephson Junctions Quantum Properties of Superconducting Tunnel Junctions
Thermodynamics and Thermal Properties of the Superconducting State
2004-01-01

This chapter contains sections titled: General Aspects of Thermodynamics Specific Heat Thermal Conductivity Ginzburg-Landau Theory Characteristic Lengths of Ginzburg-Landau Theory Type-I Superconductors in a Magnetic Field Type-II Superconductors in a Magnetic Field Fluctuations Above the Transition Temperature States Outside Thermodynamic Equilibrium
Modeling He-Rich Disks in AM CVn Binaries
2004-01-01

We have developed a new code for the calculation of synthetic spectra and vertical structures of accretion disks in cataclysmic variables and compact X-ray binaries. Here we present results for the CV system AM CVn. AM CVn stars are a special type of cataclysmic variables, also called helium cataclysmics. They are systems of interacting binary white dwarfs, consisting of a degenerate C-O white dwarf primary and a low mass semi-degenerate secondary. The secondary loses mass, almost, pure helium, to the primary, forming an accretion disk. They have all in common a helium-rich composition, analoguous to the hydrogen-rich cataclysmic variables. They show photometric variabilities on time scales of ~ 1000s, the prototype of the class, AM CVn, e.g. exhibits a variability of ~ 18 min (Nelemans et al. 2001).
Phase-resolved Spectroscopy of the Crab Pulsar with XMM-Newton
2004-01-01

The Crab pulsar (PSR B0531+21) has been observed with the EPIC-pn camera on board the ESA XMM-Newton satellite. The high time resolution of the EPIC camera (7 μs) in its special Burst mode in combination with the huge effective area and the high quantum efficiency of the pn-CCD allows phase resolved spectroscopy of good quality over the energy range 0.6–8.5 keV. We performed phase resolved spectroscopy of the modulated flux of the Crab pulsar and found a significant hardening of the photon index in the inter-pulse region. Also the second pulse is harder in index by 0.1 than the first pulse.
Magnetic Field Topology of Accreting White Dwarfs
2004-01-01

Abstract We report first results of our systematic investigation of the magnetic field structure of rotating single magnetic white dwarfs and of white dwarfs in magnetic cataclysmic variables. The global magnetic field distributions on the isolated white dwarf HE 1045-0908 and the accreting white dwarfs in EF Eri and CP Tuc have been derived from phase-resolved flux and polarization spectra obtained with FORS1 at the ESO VLT using the systematic method of Zeeman tomography.
Alkali‐Ion‐Crown Ether in Art and Conservation:The Applied Bioinorganic Chemistry Approach
2004-01-01

Dried varnish is rich in many ester moieties, which may be broken down into small, soluble compounds by esterase activity or alkaline hydrolysis. Two methods for varnish removal have been developed, including the treatment of either lipase or RbOH / PEG-400 crown ether which allow aged oil varnishes or paint coverings to be removed or thinned. These techniques are designed to proceed in a controlled manner without damaging lower paint or base layers. Unfortunately, lipase did not react with the aged ester groups of dried linseed oil varnish. Surprisingly, the varnish came off in the presence of Tris buffer alone which, in addition, formed reactive metal complexes. A better choice was the use of high M(r) alkali ion polyethylene glycol-400 (PEG-400) crown ether type chelates. PEG-400 complexes alkali ions including rubidium and other alkaliions impeding the diffusion of their basic counter ions into lower varnish or paint layers. Possible migration of alkali metal ions into the paint layer during alkaline varnish removal was determined by labelling the cleansing solutions with (86)Rb. Fortunately, varnish is degraded on the surface only. Lower paint or varnish layers are not attacked even if chemically similar to the varnish or over painting to be removed as virtually no (86)Rb was detected on the paint surface.
The Primex Proposal, Minimum Bid Price Requirements, And NASDAQ Market Woes
2004-01-01

The objective of this case is to teach and initiate a class discussion about the Primex proposal and minimum bid price requirements at NASDAQ. The discussion is facilitated by a real world case example that focuses on current NASDAQ market woes. Issues central to the performance of NASDAQ as a market place are analyzed. In addition, this study considers the effect of the merger of Instinet and Island on NASDAQ and evaluates NASDAQ's IPO decision.
Reduced toxicity of F-deficient Sendai virus vector in the mouse fetus
2004-01-01

Current concerns over insertional mutagenesis by retroviral vectors mitigate investigations into alternative, potentially persistent gene therapy vector systems not dependent upon genomic integration, such as Sendai virus vectors (SeVV). Prenatal gene therapy requires efficient gene delivery to several tissues which may not be achievable by somatic gene transfer to the adult. Initially, to test the potential and tropism of the SeVV for gene delivery to fetal tissues, first generation (replication and propagation competent) recombinant SeVV, expressing s-galactosidase was introduced into late gestation immunocompetent mice via the amniotic and peritoneal cavities and the yolk sac vessels. At 2 days this resulted in very high levels of expression particularly in the airway epithelium, mesothelium and vascular endothelium, respectively. However, as expected, substantial vector toxicity was observed. The efficiency of gene transfer and the level of gene expression were then examined using a second generation Sendai virus vector. The second generation was developed to be still capable of cytoplasmic RNA replication and therefore high level gene expression but incapable of vector spread due to lack of the gene for viral F-protein. Vector was introduced into the fetal amniotic and peritoneal cavities, intra-vascularly, intra-muscularly and intra-spinally; at 2 days, expression was observed in the airway epithelia, peritoneal mesothelia, unidentified cells in the gut wall, locally at the site of muscle injection and in the dorsal root ganglia, respectively. Mortality was dramatically diminished compared with the first generation vector.
A Probabilistic Framework for Robust and Accurate Matching of Point Clouds
2004-01-01

We present a probabilistic framework for matching of point clouds. Variants of the ICP algorithm typically pair points to points or points to lines. Instead, we pair data points to probability functions that are thought of having generated the data points. Then an energy function is derived from a maximum likelihood formulation. Each such distribution is a mixture of a bivariate Normal Distribution to capture the local structure of points and an explicit outlier term to achieve robustness. We apply our approach to the SLAM problem in robotics using a 2D laser range scanner.
Path dependence without deliberation - an excercise model connecting rationality and evolution -
2004-01-01

Traditional game theory usually relies on commonly known decision rationality meaning that choices are made in view of their consequences (the shadow of the future). Evolutionary game theory, however, denies any cognitive deliberation by assuming that choice behavior evolves due to its past success (the shadow of the past) as typical in evolutionary biology. Indirect evolution does not consider the two opposite approaches as mutually exclusive but allows to combine them in various ways (Berninghaus et al., 2003). Here we provide a simple application allowing any linear combination of rational deliberation and path dependence, i.e. of the two shadows.
Technological Progress and Market Growth: An Empirical Study Based on the Quality-Ladder Approach
2004-01-01

This paper develops an extended version of the quality-ladder model by allowing for heterogeneous markets. Based on this model, it presents an empirical analysis of innovation-based growth at the market level using a technometric measurement concept. It can be shown that a growth-promoting effect due to technological progress in a particular, single year is observed after between two and up to seven years. This is true not only for highly innovative markets, but also for those in which fewer R&amp;D resources are invested.
Functions Describing Preferred Orientation in Flat Aggregates of Flake-Like Clay Minerals and in Other Axially Symmetric Fabrics*
2004-01-01

The oriented aggregates of flake-like clay minerals, prepared in the laboratory for X-ray identification purposes, are axially symmetric fabrics, with the axis of symmetry or pole perpendicular the surface. The density of the vectors normal to the basal planes of the clay particles has its maximum at the pole. A given number of particles is considered, and the degree of orientation is assumed variable with one single parameter t, defined as maximum density over constant average density D. The decline of the basal vector density from the pole to the equator may then be described by a power of the cosine of the polar angle ~: D(~, t) = t-/)-(eos ~o) t-1. (9) This formula yields a quantitative description of orientation patterns measured on artificial fabrics by means of X-ray diffraction and on the universal stage. In some cases, the description may be refined by using a function composed of two additive cosine powers. The cosine power is by no means a mathematically unique solution but other possible functions are less versatile and yield no better fit with the experimental data. The Gauss distribution may be regarded as an approximation of (9) for very high degrees of orientation. Introduction Oriented aggregates of f lake-l ike c lay par t ic les are commonly p repa red in the l a b o r a t o r y in order to ob ta in enhanced basa l reflect ions in X r a y di f f ract ion for ident i f ica t ion purposes. An enhancemen t also of the d iagnos t ica l ly i m p o r t a n t (0k0) ref lect ions m a y be achieved in a su i t ab ly a l igned Guinier camera b y the use of o r ien ted aggregates as well (Lippmann, 1968). These p repara t ions , f lake-l ike themselves , a lbe i t on a much larger scale t h a n the ind iv idua l par t ic les , mus t be expec ted to exhib i t ax ia l s y m m e t r y wi th the axis of s y m m e t r y pe rpend icu la r to the f lake surface. The var ious techniques of p repar ing or ien ted c lay aggregates do no t de l ibe ra te ly a im a t ax ia l symmet ry . I t is more a by -p roduc t of the efforts to ob t a in a homogeneous c lay fi lm with a cons tan t th ickness over the whole face. To this end, no th ing is done which might create a pr iv i leged di rec t ion wi thin the p lane of the specimen. Such a direct ion, if present , would have to be descr ibed b y an az imu th angle, i .e. b y an angle with some reference d i rec t ion in the specimen surface, e.g. wi th a slide edge. F r o m the absence of a n y process which might br ing abou t an az imu tha l dependence of or ien ta t ion dur ing specimen p repa ra t ion we m a y conclude t h a t the resul t ing or iented aggregates are indeed ax ia l ly symmetr ic . * Herrn Prof. Dr. Wolf v. Engelhardt zum 60. Geburtstag gewidmet. 6 Contr. Mineral. and Petrol., Vol. 25
SystemC and SystemVerilog: Where do they fit? Where are they going?
2004-01-01

There is tremendous interest in design languages these days - and more particularly, SystemC and SystemVerilog. Sometimes the truth about design languages can be obscured by marketing and the press. This panel is meant to deepen the technical understanding of the DATE audience on the issue of design languages. It contains five technical experts - an academic expert in design languages and SystemC and SystemVerilog in particular; a language expert for each of SystemC and SystemVerilog; and a user expert for these two languages. The language experts have been heavily involved in the specification and evolution of their respective languages. The user experts have been heavily involved in developing use methodologies for these languages within their own design communities, and in applying them to real design problems. The panellists will consider the questions: 1) what are the key capabilities of these languages and what do they offer to users?; 2) which design problems are they best used for? what is their scope?; 3) how has application of these languages to real design problems improved the productivity of designers and the quality of the design results?; and 4) where should the languages develop further capabilities?.