gebhart/patrepeval huggingface dataset:
A Threshold Blind Digital Signature Scheme Using Elliptic Curve Dlog-Based Cryptosystem (2015)

In a (t,n) threshold Blind Digital signature scheme, only t or more users can generate a group signature on behalf of the entire group in a cryptographically secure manner. Such signatures require that a signer be able to sign a document without knowing its contents. Moreover, should the signer ever see the document/signature pair, he should not be able to determine when or for whom he signed it. By using blind digital signature, we can design protocols for secure distributed electronic banking, and secure online voting with multiple voting centers. In this paper, a blind threshold signature scheme based on elliptic curve discrete logarithm problem has been proposed. The proposed scheme provides high level of secrecy for small key sizes compared to the threshold signature schemes based on discrete logarithm problem (DLP) over a finite field or an integer factorization problem (IFP). Moreover, our proposed scheme has moderate timings, and timing do not vary significantly with changing the key size which reflects the suitability of the proposed scheme for applications where the devices are resource constrained such as mobile phones, PDAs, and sensor nodes.
Large scale circuit simulation exploiting combinatorial multigrid on massively parallel architectures (2018)

The complexity of modern very large scale integrated circuits renders circuit simulation very essential in the design process, as it is the only feasible way to verify circuit's behaviour prior to manufacturing. The heart of circuit simulation relies on the solution of huge systems resulting after the modelling using Modified Nodal Analysis. Matrices arising in those systems are sparse Symmetric Diagonally Dominant (SDD) matrices, and as a result, iterative methods for efficiently manipulating them are very crucial to the performance of the simulation. In recent years, the emphasis has been placed on preconditioning methods which reduce the number of iterations for solving such systems, while significant advancements have been accomplished in efficient implementations on massively parallel architectures like GPUs. This paper presents a GPU-accelerated simulator, based on the Preconditioned Conjugate Gradient method, which exploits the Combinatorial Multigrid, a reliably efficient SDD solver based on support theory principles, for fast DC and transient analysis of large-scale circuits. Experimental results on IBM power grids, demonstrate speedups up to 4.56x and 5.10x for the PCG method and the CMG preconditioning algorithm, respectively, compared to the optimized CPU implementations.
Non-contact mechanical and chemical analysis of single living cells by microspectroscopic techniques (2017)

Innovative label-free microspectroscopy, which can simultaneously collect Brillouin and Raman signals, is used to characterize the viscoelastic properties and chemical composition of living cells with sub-micrometric resolution. The unprecedented statistical accuracy of the data combined with the high-frequency resolution and the high contrast of the recently built experimental setup permits the study of single living cells immersed in their buffer solution by contactless measurements. The Brillouin signal is deconvoluted in the buffer and the cell components, thereby revealing the mechanical heterogeneity inside the cell. In particular, a 20% increase is observed in the elastic modulus passing from the plasmatic membrane to the nucleus as distinguished by comparison with the Raman spectroscopic marker. Brillouin line shape analysis is even more relevant for the comparison of cells under physiological and pathological conditions. Following oncogene expression, cells show an overall reduction in the elastic modulus (15%) and apparent viscosity (50%). In a proof-of-principle experiment, the ability of this spectroscopic technique to characterize subcellular compartments and distinguish cell status was successfully tested. The results strongly support the future application of this technique for fundamental issues in the biomedical field.
Double Tree: An Advanced KWIC Visualization for Expert Users (2010)

In this paper we present Double Tree, a new visualization of Key Word In Context (KWIC) displays targeted to support linguistic analysis. Inspired by Wattenberg's and Viégas' [1] Word Tree visualization, Double Tree extends the idea of representing KWIC results as trees. We address several issues with Word Trees with respect to the specific demands of linguists and discuss the design decisions and implementation details that we chose for Double Tree. In particular we present our approach for displaying a two-sided tree. We describe details of the layout, including how frequency and linguistic information is incorporated, and what user interaction is supported. We conclude with some consideration on possible next steps for Double Tree.
<i>α</i>-Galactosidase from Alfalfa Seeds (<i>Medicago sativa</i>L.) (1979)

An α-galactosidase from alfalfa seeds was purified 140-fold by ammonium sulfate fractionation, and column chromatography on Sephadex G-100, DEAE- and CM-Sephadex. Polyacrylamide-gel electrophoresis of the purified enzyme showed a single protein band. The molecular weight was estimated to be approximately 57,000 by gel-filtration. The purified enzyme hydrolyzed p-nitrophenyl α-d-galactoside more rapidly than raffinose. The maximal enzyme activities were obtained at pH 4.0 and 5.5 for p-nitrophenyl α-d-galactoside and at 4.5 for raffinose. The enzyme was shown to be inhibited by Hg2+ and Ag+ ions, and d-galactose.
Stereoscopic television system for use with the operating microscope (1985)

A new and simple method of stereoscopic television imaging of surgical procedures performed under an operating microscope has been developed. Two television cameras of the same type, two television monitors of the same size, and a mirror box for fusion of the two visual objects on the two television monitors are used. No significant modifications of available components are necessary. The method can be applied to all operating microscopes with a beam splitter.
Roles of alphabeta and gammadelta T Cell Subsets in Viral Immunity (1992)

The current status of T-cell subset involvement in viral immunity is summarized for experimental studies in mice. The immunobiology of the normal host response is discussed, with particular reference to lymphocytic choriomeningitis (LCM) and influenza. The general impression is that CD8+ cytotoxic T lymphocytes, CD4+ TH1 cells, gamma interferon, and IL-2 are of major importance, with these different components of the immune system interacting to promote an optimal response. However, experiments with a variety of virus systems indicate that there is considerable plasticity, at least in young, adult mice. Other mechanisms often compensate if a key lymphocyte subset is absent throughout the development of the immune response. Influenza-infected mice depleted of either CD4+ or CD8+ T cells clear virus and recover, though the latter may not be true for the elimination of LCM virus. Emerging information on the involvement of gamma delta T cells in viral pneumonia is summarized, but there is as yet no understanding of the biological significance (if any) of these lymphocytes in viral immunity. The point is made that alpha beta T-cell memory to viruses is long-lived, and the need for antigen persistence to maintain such memory is questioned.
A Herpesvirus Associated with Mass Mortality of Juvenile and Adult Koi, a Strain of Common Carp (2000)

A herpesvirus was isolated from adult koi, a strain of common carp Cyprinus carpio, suffering mass mortality in two outbreaks-one in the mid-Atlantic region of the United States and the second in Israel. The principal external signs of dying fish were pale and irregularly colored gills. There were few consistent internal signs in either outbreak. The most prominent microscopic lesions were in the gills, where hyperplasia and necrosis of the epithelium were severe. Other lesions included interstitial nephritis, splenitis, and enteritis. Affected cells often contained nuclei with marginated chromatin and faint intranuclear inclusions. Typical herpesvirus particles were present in branchial epithelial cells, hepatocytes, and among circulating leukocytes. Inoculations of the koi fin (KF-1) cell line with tissue extracts from the gill and kidney-spleen resulted in cytopathic effects characterized by severe vacuolation first detected after 7 d incubation at 20°C. Exposures of adult koi to the herpesvirus as propagated in KF-1 cells by bath or intraperitoneal injections resulted in 80-100% mortality during a 26-d period, and the virus was reisolated from the gill, kidney, liver, spleen, intestine, and brain of dead fish. The viral agents from koi in Israel and the United States appear to be similar if not identical; both could be distinguished from Herpesvirus cyprini by indirect fluorescent antibody tests with rabbit anti-H. cyprini serum. Other factors should be examined but we strongly suspect that this newly recognized koi herpesvirus (KHV) has the potential to be a significant cause of mortality among koi and presumably common carp.
Aberrant Wnt/β-catenin signaling can induce chromosomal instability in colon cancer (2006)

Chromosomal instability (CIN), a hallmark of most colon tumors, may promote tumor progression by increasing the rate of genetic aberrations. CIN is thought to arise as a consequence of improper mitosis and spindle checkpoint activity, but its molecular basis remains largely elusive. The majority of colon tumors develop because of mutations in the tumor suppressor APC that lead to Wnt/beta-catenin signaling activation and subsequent transcription of target genes, including conductin/AXIN2. Here we demonstrate that Wnt/beta-catenin signaling causes CIN via up-regulation of conductin. Human colon tumor samples with CIN show significantly higher expression of conductin than those without. Conductin is up-regulated during mitosis, localizes along the mitotic spindles of colon cancer cells, and binds to polo-like kinase 1. Ectopic expression of conductin or its up-regulation through small interfering RNA-mediated knock-down of APC leads to CIN in chromosomally stable colon cancer cells. High conductin expression compromises the spindle checkpoint, and this requires localized polo-like kinase 1 activity. Knock-down of conductin by small interfering RNA in colon carcinoma cells or gene ablation in mouse embryo fibroblasts enforces the checkpoint.
Color texture moments for content-based image retrieval (2003)

We adopt a local Fourier transform as a texture representation scheme and derive eight characteristic maps for describing different aspects of cooccurrence relations of image pixels in each channel of the (SVcosH, SVsinH, V) color space. Then we calculate the first and second moments of these maps as a representation of the natural color image pixel distribution, resulting in a 48-dimensional feature vector. The novel low-level feature is named color texture moments (CTM), which can also be regarded as a certain extension to color moments in eight aspects through eight orthogonal templates. Experiments show that this new feature can achieve good retrieval performance for CBIR.
Ion transport in conducting polymers (1999)

The ion transport properties and electrochemistry of chemically prepared polypyrrole/poly(styrene-4-sulfonate), poIy(3,4-ethyIenedioxythiophene)/poly(styrene-4- sulfonate), and electrochemically prepared poly(3,4-ethylenedioxythiophene)/poly(styrene- 4-sulfonate) composites have been investigated by cyclic voltammetry and impedance spectroscopy in a variety of electrolyte solutions. These polymers exhibited facile electrochemistry, fast ion transport, and good electrochemical stability. The chemically prepared polymers are approximately ten times more porous than their electrochemically prepared counterparts, and therefore have ionic conductivities that are higher by a similar factor and show less potential dependence. The ionic conductivities of these polymers are strongly dependent on the concentrations and conductivities of the electrolyte solution used. At low electrolyte concentrations, the ionic conductivities of these polymers also show some potential dependence. It is concluded that these polymers consist of permselective polymer phases containing incorporated counter- ions and pores containing the electrolyte solution. The incorporated ions account for the dependence of ionic conductivity on the applied potential and the polymer's intrinsic ionic conductivity, while the electrolyte solution in the pores explains the strong dependence of ionic conductivity on the solution concentration and conductivity. In high concentration electrolyte solutions, ion transport is dominated by electrolyte in the pores, while at low electrolyte concentrations, incorporated ions in the polymer phases become significant.
[Ser2]- and [Ser(P)2]Incretin Analogs (2004)

Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP; also known as gastric inhibitory polypeptide) are incretin hormones that reduce postprandial glycemic excursions via enhancing insulin release but are rapidly inactivated by enzymatic N-terminal truncation. As such, efforts have been made to improve their plasma stability by synthetic modification or by inhibition of the responsible protease, dipeptidyl peptidase (DP) IV. Here we report a parallel comparison of synthetic GIP and GLP-1 with their Ser2- and Ser(P)2-substituted analogs, examining receptor binding and activation, metabolic stability, and biological effects in vivo. Both incretins and their Ser2-substituted analogs showed similar EC50s (0.16-0.52 nm) and IC50s (4.3-8.1 nm) at their respective cloned receptors. Although both phosphoserine 2-modified (Ser(PO3H2); Ser(P)) peptides were able to stimulate maximal cAMP production and fully displace receptor-bound tracer, they showed significantly right-shifted concentration-response curves and binding affinities. Ser2-substituted analogs were moderately resistant to DP IV cleavage, whereas [Ser(P)2]GIP and [Ser(P)2] GLP-1 showed complete resistance to purified DP IV. It was shown that the Ser(P) forms were dephosphorylated in serum and thus in vivo act as precursor forms of Ser2-substituted analogs. When injected subcutaneously into conscious Wistar rats, all peptides reduced glycemic excursions (rank potency: [Ser(P)2]incretins > or = [Ser2] incretins > native hormones). Insulin determinations indicated that the reductions in postprandial glycemia were at least in part insulin-mediated. Thus it has been shown that despite having low in vitro bioactivity using receptor-transfected cells, in vivo potency of [Ser(P)2] incretins was comparable with or greater than that of native or [Ser2]peptides. Hence, Ser(P)2-modified incretins present as novel glucose-lowering agents.
Formation of Mesostructured Nanoparticles through Self-Assembly and Aerosol Process (1999)

Silica nanoparticles exhibiting hexagonal, cubic, and vesicular mesostructures have been prepared using aerosol assisted, self-assembled process. This process begins with homogennous aerosol droplets containing silica source, water, ethanol, and surfactant, in which surfactant concentration is far below the critical micelle concentration (cmc). Solvent evaporation enriches silica and surfactant inducing interfacial self-assembly confined to a spherical aerosol droplet and results in formation of completely solid, ordered spherical particles with stable hexagonal, cubic, or vesicular mesostructures.
Content-based Management of Document Access Control. (2001)

Three different security models have been advocated to determine the access rights to documents in a network of computers; DAC, MLS, and RBAC. Each of these models has its strength and weakness. No one can urge that any of these models can offer alone by itself an automated support for either the security or the access rights. In this paper, we propose a content-based management model for the access control to documents in a large enterprise. The model determines the access rights to documents based on their content and automatically classifies the access levels or detects possible incorrect settings. The content-based document access control can be used in advanced business applications to allow developers to provide a high level integration of security models within business applications. 1
Preparation and photoluminescence of highly ordered TiO2 nanowire arrays (2001)

Highly ordered TiO2 nanowire (TN) arrays were prepared in anodic alumina membranes (AAMs) by a sol-gel method. The TNs are single crystalline anatase phase with uniform diameters around 60 nm. At room temperature, photoluminescence (PL) measurements of the TN arrays show a visible broadband with three peaks, which are located at about 425, 465, and 525 nm that are attributed to self-trapped excitons, F, and F+ centers, respectively. A model is also presented to explain the PL intensity drop-down of the TN arrays embedded in AAMs: the blue PL band of AAMs arises from the F+ centers on the pore walls, and the TNs first form in the center area of the pores and then extend to the pore walls.
Economic Model Predictive Control for building climate control in a Smart Grid (2012)

Model Predictive Control (MPC) can be used to control a system of energy producers and consumers in a Smart Grid. In this paper, we use heat pumps for heating residential buildings with a floor heating system. We use the thermal capacity of the building to shift the energy consumption to periods with low electricity prices. In this way the heating system of the house becomes a flexible power consumer in the Smart Grid. This scenario is relevant for systems with a significant share of stochastic energy producers, e.g. wind turbines, where the ability to shift power consumption according to production is crucial. We present a model for a house with a ground source based heat pump used for supplying thermal energy to a water based floor heating system. The model is a linear state space model and the resulting controller is an Economic MPC formulated as a linear program. The model includes forecasts of both weather and electricity price. Simulation studies demonstrate the capabilities of the proposed model and algorithm. Compared to traditional operation of heat pumps with constant electricity prices, the optimized operating strategy saves 25-35% of the electricity cost.
<i>Hoxa11</i>and<i>Hoxd11</i>regulate branching morphogenesis of the ureteric bud in the developing kidney (2001)

Hoxa11 and Hoxd11 are functionally redundant during kidney development. Mice with homozygous null mutation of either gene have normal kidneys, but double mutants have rudimentary, or in extreme cases, absent kidneys. We have examined the mechanism for renal growth failure in this mouse model and find defects in ureteric bud branching morphogenesis. The ureteric buds are either unbranched or have an atypical pattern characterized by lack of terminal branches in the midventral renal cortex. The mutant embryos show that Hoxa11 and Hoxd11 control development of a dorsoventral renal axis. By immunohistochemical analysis, Hoxa11 expression is restricted to the early metanephric mesenchyme, which induces ureteric bud formation and branching. It is not found in the ureteric bud. This suggests that the branching defect had been caused by failure of mesenchyme to epithelium signaling. In situ hybridizations with Wnt7b, a marker of the metanephric kidney, show that the branching defect was not simply the result of homeotic transformation of metanephros to mesonephros. Absent Bf2 and Gdnf expression in the midventral mesenchyme, findings that could by themselves account for branching defects, shows that Hoxa11 and Hoxd11 are necessary for normal gene expression in the ventral mesenchyme. Attenuation of normal gene expression along with the absence of a detectable proliferative or apoptotic change in the mutants show that one function of Hoxa11 and Hoxd11 in the developing renal mesenchyme is to regulate differentiation necessary for mesenchymal-epithelial reciprocal inductive interactions.
An Efficient Stereoselective Synthesis of Sphingosine (1998)

A stereocontrolled synthesis of d-(+)-erythro-sphingosine (1), starting from d-xylose as chiral pool material and employing the addition-fragmentation reaction of tosyl hydrazone of 2,3 : 4,5-di-O-isopropylidene-d-xylose as key step for the chain extension with concomitant trans-selective C=C bond formation, is described.
Residual migration velocity analysis in the plane‐wave domain (2000)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2000Residual migration velocity analysis in the plane‐wave domainAuthors: Junru JiaoPaul L. StoffaMrinal K. SenRoustam K. SeifoullaevJunru JiaoDepartment of geological sciences and the Institute for Geophysics, the University of Texas at Austin, Paul L. StoffaDepartment of geological sciences and the Institute for Geophysics, the University of Texas at Austin, Mrinal K. Senthe Institute for Geophysics, the University of Texas at Austin, and Roustam K. Seifoullaevthe Institute for Geophysics, the University of Texas at Austinhttps://doi.org/10.1190/1.1816231 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1816231FiguresReferencesRelatedDetailsCited ByAmplitude-variation-with-offset and prestack-waveform inversion: A direct comparison using a real data example from the Rock Springs Uplift, Wyoming, USAGEOPHYSICS, Vol. 80, No. 2Fast velocity model building by plane‐wave migration in tilted coordinates, automated volume‐based picking, and tomographyAntoine Guitton, Moritz Fliedner, Biondo Biondi, and Francisco Ortigosa15 December 2008Synthetic Source Record Interactive Residual Migration Velocity Analysis Based on Controlled Illumination31 May 2013 | Chinese Journal of Geophysics, Vol. 50, No. 3 SEG Technical Program Expanded Abstracts 2000ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2000 Pages: 2484 publication data© 2000 Copyright © 2000 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 04 Jan 2005 CITATION INFORMATION Junru Jiao, Paul L. Stoffa, Mrinal K. Sen, and Roustam K. Seifoullaev, (2000), "Residual migration velocity analysis in the plane‐wave domain," SEG Technical Program Expanded Abstracts : 942-945. https://doi.org/10.1190/1.1816231 Plain-Language Summary PDF DownloadLoading ...
User manual for Streamtube Curvature Analysis: Analytical method for predicting the pressure distribution about a nacelle at transonic speeds, appendix (1972)

The computer program listing of Streamtube Curvature Analysis is presented. The listing includes explanatory statements and titles so that the program flow is readily discernable. The computer program listing is in CDC FORTRAN 2.3 source language form, except for three subroutines, GETIX, GETRLX, and SAVIX, which are in COMPOSE 1.1 language.