gebhart/patrepeval huggingface dataset:
Peripheral Vasculature: Whole-Body MR Angiography with Midfemoral Venous Compression—Initial Experience (2004)

Five volunteers and 10 patients suspected of having peripheral vascular disease underwent multistation contrast material-enhanced three-dimensional whole-body magnetic resonance (MR) angiography. The first examination, based on standard protocol, lasted 72 seconds, while the following two examinations, performed with a high-spatial-resolution T1-weighted gradient-recalled-echo sequence for the last two stations (lower extremities) lasted 170 seconds. In the second high-resolution examination, midfemoral venous compression was used. Intraindividual comparison showed the high-resolution protocol with venous compression resulted in the best qualitative and quantitative image quality through higher signal-to-noise and contrast-to-noise ratios in the calf arteries. Despite prolonged acquisition times, there was no venous contamination. The data suggest that midfemoral venous compression should be incorporated in multistation protocols of the lower extremities to improve depiction of calf arteries without disturbing venous overlap.
Investigation of dirithromycin and erythromycylamine uptake by human neutrophils <i>in vitro</i> (1994)

Dirithromycin, a new semisynthetic 14-membered-ring macrolide was avidly concentrated by human neutrophils in a time- but not concentration-dependent manner with mean cellular/extracellular, concentration ratios (C/E) of 9 within the first 5 min and up to 47 at 120 min. Erythromycylamine, the hydrolysis product of dirithromycin, was concentrated significantly less by neutrophils, reaching C/E values of 4 and 19 (at 5 and 120 min). A point of interest was the interindividual variability in the antibiotic uptake kinetics; in particular, 7 out of 47 neutrophil samples from different healthy volunteers displayed very slow uptake of both drugs (C/E values at 30 min: dirithromycin, 5.8; erythromycylamine, 4.6). The reason(s) for this is unknown. The uptake of both drugs was decreased at acidic pH and increased at basic pH. Chloroquine, an antimalarial drug which is concentrated in and alkalinizes azurophilic granules, reduced uptake by half. Metabolic inhibitors (2-4 dinitrophenol, sodium fluoride, potassium cyanide and sodium azide) did not impair the uptake of either drug but, interestingly, ouabain, an inhibitor of membrane Na+/K+ ATPase activity, impaired uptake by about 30%. Competitive inhibitors of some transport systems identified on neutrophil membrane (nucleosides, D-glucose and various aminoacids) did not alter the uptake of either drug. Dirithromycin and to a lesser extent, erythromycylamine, reached intracellular concentrations much higher than those required to inhibit the growth of sensitive microorganisms. Although the mechanism of uptake is not clear, one interesting hypothesis involves trapping by protonation into acidic compartments of neutrophils.
A Dogleg "Optimal" Channel Router with Completion Enhancements (1981)

Routing algorithms have been developed for use in automatic Integrated Circuit (IC) layout programs. The algorithms address the following issues: (1) completion enhancements to eliminate cyclic constraints and achieve 100 percent routing completion, although possibly sacrificing optimality; (2) a dogleg optimal channel router which allows more than one horizontal segment per net and uses a branch and bound method to find a minimal routing for the given set of nets; and (3) shortcut techniques to reduce the amount of time spent using the branch and bound method.
NEOS and Condor (2000)

We discuss the use of Condor, a distributed resource management system, as a provider of computational resources for NEOS, an environment for solving optimization problems over the Internet. We also describe how problems are submitted and processed by NEOS, and then scheduled and solved by Condor on available (idle) workstations
On-Chip Test Circuit for Measuring Substrate and Line-to-Line Coupling Noise (2006)

An on-chip test circuit has been developed to directly measure substrate and line-to-line coupling noise. This test circuit has been manufactured in a 0.35 /spl mu/m double-well double polysilicon CMOS process and consists of noise generators and switched-capacitor signal processing circuitry. On-chip analog-to-digital conversion and calibration are used to eliminate off-chip noise and to extend the measurement accuracy by removing system noise. A scan circuit is described that enables the noise waveform to be reconstructed. On-chip generators ranging in area from 0.25 /spl mu/m/sup 2/ to 1.5 /spl mu/m/sup 2/ produce noise at the receiver decreasing from 3.14 mV//spl mu/m to 0.73 mV//spl mu/m. Open and closed guard rings reduce the noise by 20% and 85%, respectively. Measurement of test circuits manufactured with an epitaxial process-5.5-/spl mu/m-thick epitaxy with 20 /spl Omega//spl middot/cm resistivity on top of a 120 /spl mu/m bulk with 0.03 /spl Omega//spl middot/cm-exhibits a frequency limit of 50MHz below which coupling is insensitive to substrate noise. The difference between experimental results and an analytic model of the line-to-line coupling capacitance ranges from 8.5% to 17.7% for different metal layers.
THE BIOLOGICAL ACTIVITY OF α-TOCOPHERYLHYDROQUINONE AND α-TOCOPHERYLQUINONE (1950)

A major obstacle in relating the biochemical action of cu-tocopherol with an oxidation-reduction system in the body has been the large and apparently convincing volume of evidence indicating that its p-quinone, cr-tocopherylquinone, and a-tocopherylhydroquinone are devoid of vitamin E activity.Thus Karrer and coworkers (2), John, Dietzel, and Emte (3), Wright and Drummond (4), Karrer and Geiger (5), and Golumbic and Mattill (6) found that the quinone was inactive in the rat.Golumbic and Mattill also reported that the hydroquinone, a-tocopherylhydroquinone, was inactive in this species.These same workers (7) found no activity when a-tocopherylquinone was administered orally or parenterally to rabbits deficient in vitamin E. While Evans et al. ( 8) reported the p-quinone to be almost as effective as a-tocopherol itself in the rat, a 4 mg.dose producing fertility in half of the animals tested, later experiments by Tishler and Evans (9) showed that 100 mg.doses of a well characterized preparation were devoid of activity.Utilizing the methods employed by Mackenzie and McCollum (10) in their demonstration of the cure of nutritional, muscular dystrophy in rabbits by ar-tocopherol, we have found that both a-tocopherylquinone and the hydroquinone are potent sources of vitamin E when injected intravenously.Furthermore, both of these compounds have been shown to cure effectively muscular dystrophy when administered in higher doses per 0s. Materials and Methodsa-Tocopherylquinone was prepared by oxidizing 2 gm. of dl-a-tocopherol' with 10 gm. of ferric chloride in 200 ml. of absolute ethanol for 24 hours at *The authors wish to express their appreciation to the Armour Fund for Research in Muscular Disease and to the Nutrition Foundation, Inc., for funds that greatly aided in these experiments.
PLANET: A Tool for Telecommunication Network Planning and its Applications in Hungary (1994)

Abstract-PLANET is an integrated software package aiding several steps of the transmission network planning, as well as the traffic simulation. The database of PLANET consists of the structural and the cost models of the transmission systems, the topological alternatives, the circuit routing and grouping rules, etc. The topological and transmission plans of the networks are obtained based on the traffic planning results checked by sim-ulation and they are stored systematically with the input data in the database of plans. The results describe the network to-pology, the circuit routes meeting different kinds of routing conditions, the grouping solutions and the equipment assign-ments to the circuit demands of different services. The users of PLANET are provided with lists and graphical documentation that can be directly used in the development of the network. The global structure of the software package as well as the al-gorithms of specific phases are discussed and the results ob-tained by the application of PLANET are demonstrated. I.
Low line memory visually lossless compression for color images using non-uniform quantizers (2011)

The paper proposes a novel method to compress color images with imperceptible quality loss. The algorithm explores the difference in error perceptibility of human visual system (HVS) for various areas. It is done by implementing different non-uniform quantizers for flat, detail and random blocks of pixels. These blocks are classified based on principle component analysis (PCA) and prediction error. For hardware implementation purpose, the algorithm is designed to use very low line memory. Simulation results show that the proposed compression is visually lossless in all categories of tested images with high compression ratio.
Diversified redundancy in the measurement of Euler angles using accelerometers and magnetometers (2007)

Euler angle determination plays an important role in control of aerial vehicles. Euler angles can be determined based on the measurements of the projections of earth magnetic field and gravity on the three body axes of the vehicle. The proposed approach utilizes seven methods to compute the Euler angles and each of these methods employs a different subset of the six measurements. The capability of computing the Euler angles in multiple ways provides a diversified redundancy required for fault tolerance. This diversified redundancy can be also used to separate the desired measurement from extraneous interferences and to identify sensor failures.
Tracking replication-competent HIV reservoirs in infected individuals (2013)

Given that the majority of infected CD4(+) T cells in vivo carry replication-defective HIV, longitudinal measurements of the frequency of cells carrying replication-competent HIV along with other quantitative virologic parameters, such as levels of plasma viremia and cell-associated viral nucleic acid, can provide critical insight into the dynamics of the persistent viral reservoirs. Information related to HIV pathogenesis and the feasibility of eradicating the virus in infected individuals receiving ART in combination with novel therapeutic agents can also be gained from these analyses.
Gene Structures and Regulation of the Alkane Hydroxylase Complex in <i>Acinetobacter</i> sp. Strain M-1 (2001)

In the long-chain n-alkane degrader Acinetobacter sp. strain M-1, two alkane hydroxylase complexes are switched by controlling the expression of two n-alkane hydroxylase-encoding genes in response to the chain length of n-alkanes, while rubredoxin and rubredoxin ruductase are encoded by a single gene and expressed constitutively.
Cytoplasmic Aldo-Keto Reductases: A Class of Drug Metabolizing Enzymes (1976)

Aldehyde and ketone xenobiotic substances are preferentially reduced to alcohols by cytoplasmic enzymes in mammals. These enzymes are widely distributed in the tissues, have broad substrate specificities, have similar physical-chemical characteristics, and require reduced nicotinamide adenine dinucleotide as cofactor for the reductions. These reductases define a system of detoxification for aldehyde and ketone groups.
Omnidirectional stereo vision using fisheye lenses (2014)

This work presents an omnidirectional stereo system with a direct application to autonomous logistics. The omnidirectional system uses fisheye lenses to inspect the surroundings of the automated forklift. The lenses are mounted on the top of the vehicle to allow a 360° scene reconstruction with a single stereo pair. The system provides the list of obstacles detected around the vehicle. The reconstruction of the scene is possible via a division of the fisheye images into several rectified images. A stereo matching algorithm is applied to each pair of rectified images. The computed 3D points corresponding to the rectified pairs are unified into a single cloud. The obstacle detection module operates on the unified cloud of 3D points.
Congestion control for intelligent networks (2003)

Due to the centralized control architecture in intelligent networks (IN), service control points (SCPs) working as central servers have to carry out a large number of service requests coming from underlying service switching points (SSPs). Appropriate congestion control, considering the special IN aspects, is required. In view of the importance of ensuring the SCP throughput during network overload, it was judged worthwhile to perform a comparative study of the effectiveness of two different SCP congestion control methods. The first one is the call rate based control using the call gapping or leaky bucket principle, the second is the window method. This study required the development of a simulation program, to determine the call throughput resulting from use of these methods under various types of overload traffic. The results of these simulations are presented and discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The Psychological Appeal of Personalized Content in Web Portals: Does Customization Affect Attitudes and Behavior? (2006)

Internet technology has made possible the widespread dissemination of individualized media messages, but we know very little about their psychological import. A between-subjects experiment ( N =60) with three levels of customization (low, medium, high) was designed to examine whether greater levels of personalized content engender more positive attitudes. The results not only confirm this hypothesis but also reveal the mediating role played by users’ perceptions of relevance, involvement, interactivity, and novelty of portal content. In addition, customization has behavioral effects in that it affects users’ browsing activity.
Structure and expression of major histocompatibility complex-binding protein 2, a 275-kDa zinc finger protein that binds to an enhancer of major histocompatibility complex class I genes. (1992)

We have isolated a cDNA encoding a transcription factor that binds to the enhancer of major histocompatibility complex (MHC) class I genes. MHC-binding protein 2 (MBP-2) is a 275-kDa protein, containing two sets of widely separated zinc fingers and a stretch of highly acidic amino acids, a putative transactivation domain. The two zinc finger regions, when expressed individually as bacterial fusion proteins, bind with highest affinity to the MHC class I gene enhancer. Several proteins found in mammalian nuclear extracts bind the MHC class I enhancer in an electrophoresis mobility shift assay. Only one of these, a ubiquitously expressed factor, forming a slow-migrating retarded complex, can be supershifted by a MBP-2 antiserum. The same antiserum also precipitates a protein of greater than 250 kDa from COS cells transfected with a MBP-2 expression vector. Our data indicate that MBP-2 is a transcription factor involved in the regulation of MHC class I gene expression.
Generating a mixed mesh of hexahedra, pentahedra and tetrahedra from an underlying tetrahedral mesh (2000)

The decomposition of an arbitrary polyhedral domain into tetrahedra is currently more tractable than its decomposition into hexahedra. However, for some engineering applications, a mesh composed of hexahedra, or even a mixture of hexahedra, pentahedra and tetrahedra, is preferable. One such application is the p-type finite element method, where the total number of elements should be as small as possible. We show in this paper that given a tetrahedral decomposition, some of the tetrahedra can be efficiently combined into hexahedra and pentahedra. The basis of the method is a classification, using a generalized graph representation, of all possible tetrahedral decompositions of pentahedra and hexahedra. We then present a tetrahedral merge algorithm that utilizes this result to search for the subgraphs of hexahedra and pentahedra in a tetrahedral mesh. The problem of finding an optimal solution is NP-complete. We present heuristics to increase the number of hexahedra and pentahedra, within a reasonable amount of computation time. The algorithm has been implemented in the PolyFEM mesher, and examples showing the typical merge success of the algorithm are included. Copyright © 2000 John Wiley & Sons, Ltd.
An Investigation of Flow Through Screens (1951)

Abstract Analytical and experimental studies on the three principal aspects of flow through screens are described: (a) The relative drop in pressure as a function of screen form and solidity ratio; (b) the capacity of screens to modify the velocity distribution; and, (c) the characteristics of the turbulence which screens produce. Because of their frequent hydraulic application, primary attention is given to relatively coarse lattices and perforated plates. Results are presented in dimensionless graphs which are immediately usable for design purposes.
Neural network-based face detection (1996)

We present a neural network-based face detection system. A retinally connected neural network examines small windows of an image and decides whether each window contains a face. The system arbitrates between multiple networks to improve performance over a single network. We use a bootstrap algorithm for training the networks, which adds false detections into the training set as training progresses. This eliminates the difficult task of manually selecting non-face training examples, which must be chosen to span the entire space of non-face images. Comparisons with other state-of-the-art face detection systems are presented; our system has better performance in terms of detection and false-positive rates.
Alkaline hydrolysis of 7,8-dimethyl-10-(formylmethyl)isoalloxazine. A kinetic study (1980)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkaline hydrolysis of 7,8-dimethyl-10-(formylmethyl)isoalloxazine. A kinetic studyIqbal Ahmad, H. David C. Rapson, Paul F. Heelis, and Glyn O. PhillipsCite this: J. Org. Chem. 1980, 45, 4, 731–733Publication Date (Print):February 1, 1980Publication History Published online1 May 2002Published inissue 1 February 1980https://pubs.acs.org/doi/10.1021/jo01292a040https://doi.org/10.1021/jo01292a040research-articleACS PublicationsRequest reuse permissionsArticle Views169Altmetric-Citations37LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Identification of Campylobacter species by southern hybridization of genomic DNA using an oligonucleotide probe for 16S rRNA genes (1987)

Nine strains of four species of Campylobacter (C. jejuni, C. fetus, C. coli, C. laridis) were studied by genomic Southern hybridization. Restriction digests of chromosomal DNA prepared by treatment with either Eco RV or Rsa I were probed with an oligonucleotide specific for Campylobacter 16S ribosomal RNA genes. Six distinct hybridization patterns were obtained, each indicating the presence of 2–4 copies of the 16S rRNA gene are encoded in Campylobacter DNA. Differences in the hybridization patterns were observed not only between members of two species, but also between individual strains of the same species. Of the four C. jejuni strains tested, two different hybridization patterns were evident. Similar results were observed with different strains of C. coli and C. laridis. The relative simplicity of the patterns obtained, combined with the apparent diversity among individual strains, suggests that DNA-fingerprinting with the 16S rRNA gene probe could be a potentially useful identification method in epidemiological studies of Campylobacter infection.
The Oxidation of Thebaine with <i>m</i>‐Chloroperbenzoic Acid. Studies in the (+)‐Morphinan Series. III (1977)

Zur Oxydation von Thebain mit m ‐Chlorperbenzoesäure, III Die Oxydation von Thebain ( 1 ) mit m ‐Chlorperbenzoesäure ist stark abhängig von den gewählten Reaktionsbedingungen. In unserem Fall wird neben 14‐Hydroxy‐codeinon ( 2 ) auch das bekannte, mono‐acetylierte Diol 3 erhalten. Die Rückführung von 3 in 2 und die Verknüpfung mit dem bekannten Ketodiol 5 , über das bisher nicht beschriebene 8, 14‐Dihydroxydihydrothebain ( 4 ) wird gezeigt.
Quantitative radiographic imaging using a photostimulable phosphor system (1990)

We have evaluated a photostimulable phosphor x-ray imaging system [Philips Computed Radiography (PCR) system] for use in quantification of x-ray exposure in diagnostic radiography. An exponential function was fitted to data yielding quantitative x-ray exposure values as a function of digital pixel values. We investigated several factors that affect the accuracy of exposure measurement using the PCR including repeatability, background noise as a function of time delay between plate erasure and use, sensitivity variation between different plates, nonuniformity of sensitivity within a plate, decay of the latent image between time of exposure and readout (observed as a change in sensitivity), and the accuracy with which the (exponential) calibration function yields exposure values as a function of digital pixel values. The calibration was performed over the exposure range from 5.1 X 10(-9) to 2.0 X 10(-5) C/kg (0.02-75 mR). The accuracy of exposure measurements made with a single imaging plate is between 1.6% and 4.2%. If measurements from several plates are involved, the uncertainty in the final measurement will be between 5% and 5.9%.
An Empirical Testing Hysteresis in Unemployment for Eight Eastern Europe Countries: A Panel SURADF Approach (2015)

The hysteresis hypothesis in unemployment for the eight Eastern Europe countries is tested using the newly developed Panel SURADF tests of Breuer et al. (2001) for the period 2002-2014. While the other Panel-based unit root tests are joint tests of a unit root for all members of the panel and are incapable of determining the mix of I(0) and I(1) series in the panel setting, the Panel SURADF tests a separate unit-root null hypothesis for each individual panel member; it therefore identifies how many and which series in the panel are stationary processes. The hysteresis hypothesis does not hold for all eight Eastern Europe countries except for Lithuania when Breuer et al.'s Panel SURADF tests are conducted.