gebhart/patrepeval huggingface dataset:
GraphTrek: Asynchronous Graph Traversal for Property Graph-Based Metadata Management (2015)

Property graphs are a promising data model for rich metadata management in high-performance computing (HPC) systems because of their ability to represent not only metadata attributes but also the relationships between them. A property graph can be used to record the relationships between users, jobs, and data, for example, with unique annotations for each entity. This high-volume, power-law distributed use case is a natural fit for an out-of-core distributed property graph database. Such a system must support live updates (to ingest production information in real time), low-latency point queries (for frequent metadata operations such as permission checking), and large-scale traversals (for provenance data mining). Large-scale property graph traversals are particularly challenging for distributed graph databases, however. Most existing graph databases implement a "level-synchronous" breadth-first search algorithm that relies on global synchronization in each traversal step. This traversal model performs well in many problem domains, but a rich metadata management system is characterized by imbalanced graphs, long traversal lengths, and concurrent workloads, each of which has the potential to introduce or exacerbate stragglers. We define stragglers as abnormally slow steps (or servers) in a graph traversal that lead to low overall throughput for synchronous traversal algorithms. The straggler problem can be mitigated by the use of asynchronous traversal algorithms. Asynchronous traversal has been successfully demonstrated in graph processing frameworks, but such systems require the graph to be loaded into a separate batch-processing framework. In this work, we propose GraphTrek, a general asynchronous graph traversal engine working with graph databases for processing rich metadata management in their native format. We also outline a traversal-aware query language and key optimizations (traversal-affiliate caching and execution merging) necessary for efficient performance. Our experiments show that the asynchronous graph traversal engine is more efficient than its synchronous counterpart in the case of HPC rich metadata processing, where more servers are involved and larger traversals are needed.
Design of bidirectional PWM Sepic/Zeta DC-DC converter (2007)

Bidirectional DC-DC converters allow transfer of power between two dc sources, in either direction. Due to their ability to reverse the direction of flow of power, they are being increasingly used in many applications such as battery charger/dischargers, dc uninterruptible power supplies, electrical vehicle motor drives, aerospace power systems, telecom power supplies, etc. This paper proposes a new bidirectional Sepic/Zeta converter. It has low switching loss and low conduction loss due to auxiliary communicated circuit and synchronous rectifier operation, respectively. Because of positive and buck/boost-like DC voltage transfer function (M=D/1-D), the proposed converter is desirable for use in distributed power system. The proposed converter also has both transformer-less version and transformer one. The paper also suggest some design guide line for the proposed converter.
Rollout strategies for real‐time multi‐energy scheduling in microgrid with storage system (2015)

The rising climatic concerns force the conventional power system to minimise the gas emissions. Microgrid integrating with renewable energy plays a key role in utilising power systems in a more environment friendly way. Compared with single renewable energy system, the microgrid with multi‐energy systems is more attractive in practice. The schedule problem is considered to schedule wind power, combined heating and power generation (CHP), battery, and power grid in order to satisfy the electricity load and heat loads in the microgrid with the minimal cost in real time. Owing to the stochastic nature of wind power generation, it is a challenge to solve the multi‐energy scheduling problem when using the obtained real‐time information. In this study, the joint scheduling of the microgrid with multi‐energy systems is formulated as a rolling horizon Markov decision process (MDP). Moreover, then the rollout algorithm is applied to solve the problem in order to deal with the large state and decision space of MDP, which is caused by the increase of the number of CHPs. The feasible base policy needed in the rollout algorithm is constructed using a greedy algorithm. Numerical results demonstrate that the algorithm can achieve the requirement of real‐time scheduling effectively.
Ontology-based modeling of production systems for design and performance evaluation (2014)

This paper presents the extension to an ontology-based data model supporting the design and performance evaluation of production systems. This extension aims to link the modeling of the spatial representation of physical objects with the characterization of their states and behavior. Furthermore, the formalization of the performance history of a production system and its components is addressed to capture both the spatial and state evolution of the objects. Such history can be provided by simulation runs or gathered from a monitoring system. A test case is described and then used to show how different software tools can be integrated to support the integrated design and evaluation of a production system.
Further Investigation of the Use of Intratracheally Administered Hyaluronic Acid to Ameliorate Elastase-Induced Emphysema (1997)

Previously, this laboratory has shown that intratracheally administered hyaluronic acid (HA) significantly reduces air-space enlargement in a hamster model of emphysema induced with pancreatic elastase. Whereas HA was given immediately following elastase in those initial studies, the current investigation determined the effect of instilling HA up to 2 h before or after intratracheal administration of elastase to hamsters. Both 1 and 2 mg HA, given 2 h before pancreatic elastase, significantly decreased (p < .05) air-space enlargement compared to controls (as measured by the mean linear intercept). Instillment of 2 mg HA, 1 h after pancreatic elastase, had a similar effect (p < .05). In contrast, 1 mg HA, given 1 or 2 h after pancreatic elastase, did not significantly affect the mean linear intercept. Against human neutrophil elastase, HA exhibited the same protective effect. While neutrophil elastase induced less air-space enlargement than pancreatic elastase, both 1 and 4 mg of HA, given 2 h prior to the enzyme, still produced a significant reduction (p < .05) in the mean linear intercept. HA exerted this effect despite the fact that it initiates a transient influx of neutrophils into the lung. Since HA does not slow the clearance of intratracheally instilled [14C] albumin from the lung, its mechanism of action may not involve physical interference with the movement of elastase through the lung, but may instead depend on interaction with elastic fibers. Evidence for an association between these two matrix constituents was provided by studies using fluorescein-labeled HA. Overall, these results further suggest that HA may be useful in preventing lung injury by elastases.
Surface tension of fatty acids and triglycerides (1999)

Abstract Surface tension as a function of temperature was measured for four fatty acids (lauric, myristic, palmitic, and oleic) and two triglycerides (tricaprylin and tripalmitin). These surface tension measurements were performed using a K12 vers. 3.1 (Krüss GmbH) tensiometer at temperatures from 20 (or the melting point of each substance) to 90°C. The constants for a van der Waals‐type correlation as well as for a linear equation are presented. Both equations are quite accurate, presenting mean deviations not exceeding 0.570%. Such correlation constants are valuable in the design or evaluation of processing equipment, especially that involving gas‐liquid contact such as distillation and stripping columns, deodorizers, reactors, and equipment for physical refining.
The “Peroxo Perrhenic Acid” H<sub>4</sub>Re<sub>2</sub>O<sub>13</sub>: An Oxygen‐Rich Metal Peroxide and Oxidation Catalyst (1996)

Abstract The rhenium oxides Re 2 O 7 and ReO 3 react with hydrogen peroxide solutions yielding peroxo complexes that efficiently catalyze the oxidation of olefins, aromatics, and certain organometallic compounds. In contrast, related oxides of molybdenum (MoO 3 ) and vanadium (V 2 O 5 ) do not activate H 2 O 2 under comparable conditions. The active rhenium peroxo complex was isolated from the system Re 2 O 7 /H 2 O 2 : the crystalline red‐orange, explosive compound of formula H 4 Re 2 O 13 is the most oxygen rich rhenium compound isolated to date. Its structure resembles a “peroxo perrhenic acid”. The binuclear compound could be isolated in the form of a diglyme adduct, structurally defined as two corner‐sharing pentagonal bipyramids with apical oxo and aquo ligands; the equatorial positions are occupied by the bridging oxygen and by n 2 ‐peroxo groups (two [O 2 ] 2− ligands per rhenium). In contrast to the known complex [CH 3 ReO(O 2 ) 2 ].H 2 O, the new peroxo species [O{ReO(O 2 ) 2 .H 2 O} 2 ] decomposes hydrolytically during the catalytic cycle and can thus not compete in terms of catalytic activity in oxidation reactions involving H 2 O 2 . Hydrolysis yields “perrhenic acid” Re 2 O 7 .2H 2 O, the diglyme adduct of which compound was also characterized by means of an X‐ray diffraction analysis.
Microdevices for dielectrophoretic flow-through cell separation (2003)

A novel dielectrophoretic cell-separation technique has been developed for the separation of white blood cells. A microdevice was constructed from two consecutive arrays of microelectrodes, one to focus the particles into a sheet and the second to separate them using a combination of positive and negative dielectrophoresis. At a flow rate of 1 ml/hour, experiments showed that THP-1 cells were captured on the electrode array. The experimental results were compared with a 2-D numerical simulation of the particle dynamics. The device is shown to be effective at fractionating subpopulations of cells into different bands along the array.
Synthesis of amino acids and related compounds. 29. Synthesis and hypolipidemic activities of 5-thienyl-4-oxazoleacetic acid derivatives (1986)

A series of 2,5-disubstituted 4-oxazoleacetic acid derivatives was synthesized and evaluated for hypolipidemic activity. Among them, those with a thienyl group at C-5 of the oxazole ring exerted highly potent hypolipidemic effects in rats. 2-(4-Fluorophenyl)-5-(3-thienyl)-4-oxazoleacetic acid (88) was the most potent derivative: it was about 2 times as active in normal SD male rats and about 4 times as active in hereditary hyperlipidemic rats (THLR/1) as clofibrate with an improved antiarteriosclerosis index (HDL-Cho/Total-Cho). In addition, it showed inhibition of platelet aggregation ex vivo.
Gamma-distorted fringe image modeling and accurate gamma correction for fast phase measuring profilometry (2011)

In fast phase-measuring profilometry, phase error caused by gamma distortion is the dominant error source. Previous phase-error compensation or gamma correction methods require the projector to be focused for best performance. However, in practice, as digital projectors are built with large apertures, they cannot project ideal focused fringe images. In this Letter, a thorough theoretical model of the gamma-distorted fringe image is derived from an optical perspective, and a highly accurate and easy to implement gamma correction method is presented to reduce the obstinate phase error. With the proposed method, high measuring accuracy can be achieved with the conventional three-step phase-shifting algorithm. The validity of the technique is verified by experiments.
<i>C</i>‐Acylierung von 5 gliedrigen N‐Heterocyclen, I. Acylierung an C‐2 von Imidazolen und Benzimidazolen (1977)

Abstract 1‐Alkyl‐ und 1‐Arylimidazole 1 reagieren mit Carbonsäurechloriden in Gegenwart von Triethylamin in polaren Solventien zu den 2‐Imidazolylketonen 4 , 5 und 7 . Analog reagieren die Verbindungen 1 mit Chlorameisensäureestern zu den 2‐Imidazolcarbonsäureestern 6 ; aus 1‐Methylimidazol ( 1 , R = CH 3 ) entsteht mit Oxalsäure‐ethylester‐chlorid der (1‐Methyl‐2‐imidazolyl)oxoessigsäure‐ethylester ( 7 5 , Tabelle 4). — Unsubstituiertes Imidazol ( 8 ) bildet mit Phthalsäuredichloriden 9 die Imidazo[1,2‐ b ]isochinolin‐5,10‐dione 12 , die mit Nucleophilen unter Ringspaltung in die Ketone 13 übergeführt werden. Analog werden mit Benzimidazol die Benzimidazo[1,2‐ b ]isochinolin‐6,11‐dione 14 gebildet, die bei der Ringöffnung in die Ketone 15 übergehen.
Ligand Exchange Chromatography of Carbohydrates at Alkaline pH: Effects of Mobile Phase Additives and Temperature (1994)

Journal Article Ligand Exchange Chromatography of Carbohydrates at Alkaline pH: Effects of Mobile Phase Additives and Temperature Get access Morgan Stefansson, Morgan Stefansson * Department of Analytical Pharmaceutical Chemistry, Uppsala University, Biomedical Center, Box 574, S-751 23 Uppsala, Sweden *Author to whom correspondence should be addressed. Search for other works by this author on: Oxford Academic PubMed Google Scholar Douglas Westerlund Douglas Westerlund Department of Analytical Pharmaceutical Chemistry, Uppsala University, Biomedical Center, Box 574, S-751 23 Uppsala, Sweden Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Chromatographic Science, Volume 32, Issue 1, January 1994, Pages 46–49, https://doi.org/10.1093/chromsci/32.1.46 Published: 01 January 1994 Article history Received: 06 August 1992 Revision received: 12 July 1993 Published: 01 January 1994
ROMP Reactivity of <i>e</i><i>ndo</i>- and <i>e</i><i>xo</i>-Dicyclopentadiene (2002)

The activation parameters for the ring-opening metathesis polymerization (ROMP) of endo- (1) and exo-dicyclopentadiene (2), endo-1,2-dihydrodicylopentadiene (3), and norbornene (4) in the presence of Grubbs' catalyst were determined using in situ NMR. The exo isomer of DCP was found to be more than an order of magnitude more reactive than the endo isomer. endo-DCP was found to have reactivity similar to its partially saturated counterpart 3, suggesting that the cause of the rate difference between the two isomers of DCP is primarily steric in nature. This interaction is shown to be predominantly entropic and is suspected to originate from an interaction of the penultimate repeat unit and the incoming monomer. Additionally, the alkylidene generated during the polymerization of endo-DCP was found to form an intramolecular complex, but this complex only affects the rate slightly.
Activation requirements of cloned inducer T cells. II. The failure of some clones to respond to antigen presented by activated B cells. (1986)

Inducer/helper T cells recognize nominal antigen in association with Ia on the surface of the antigen-presenting cell (APC). Recent studies have shown that B cells can effectively function as APC. In the present study we have assessed the ability of cloned inducer T cells to discriminate between activated B cells or splenic macrophages as APC. We found that most of the clones tested demonstrated an equivalent response to antigen presented by activated B cells or splenic adherent cells. Some clones were very efficiently stimulated by antigen presented by activated B cells, whereas other clones failed to respond or responded very poorly when activated B cells were used to present antigen. We attempted to determine the mechanism responsible for the inability of certain clones to proliferate in response to antigen presented by activated B cells.
Glucose Deprivation Increases mRNA Stability of Vascular Endothelial Growth Factor through Activation of AMP-activated Protein Kinase in DU145 Prostate Carcinoma (2005)

The induction of proangiogenic cytokines such as vascular endothelial growth factor (VEGF) is a critical feature of tumor angiogenesis. In the present study, we examined the mechanisms of VEGF gene expression induced by glucose deprivation in cancer cells, a role of AMP-activated protein kinase (AMPK) in the process, and the signal transduction pathway. AMPK functions as an energy sensor to provide metabolic adaptation under ATP-depleting conditions such as hypoxia and nutritional deprivation. Here, we show that glucose deprivation leads to a significant increase in the mRNA level of VEGF, GLUT1, and PFKFB3 genes in several cancer cells via a hypoxia-inducible factor-1-independent mechanism, and we demonstrate an essential role of AMPK in these gene expressions. Our data suggest that VEGF mRNA induction by glucose deprivation is due to an increase in mRNA stability, and the AMPK activity is necessary and sufficient to confer the stability to VEGF mRNA. We further show that reactive oxygen species is involved in glucose deprivation-induced AMPK activity in DU145 human prostate carcinomas, and c-Jun amino-terminal kinase acts as an upstream component in AMPK activation cascades under these conditions. LKB1, which was recently identified as a direct upstream kinase of AMPK, was not detected in DU145 cells. In conclusion, our results demonstrate a novel and major role of AMPK in the post-transcriptional regulation of VEGF, further implying its potential role in tumor angiogenesis.
Complete nucleotide sequence of the tycA gene coding the tyrocidine synthetase 1 from<i>Bacillus brevis</i> (1988)

Journal Article Complete nucleotide sequence of the tycA gene coding the tyrocidine synthetase 1 from Bacillus brevis Get access Renate Weckermann, Renate Weckermann Institut für Biochemie und Molekulare BiologieTU Berlin, Franklinstrasse 29, 1000 Berlin 10, GDR Search for other works by this author on: Oxford Academic PubMed Google Scholar Rainer Fürbaβ, Rainer Fürbaβ Institut für Biochemie und Molekulare BiologieTU Berlin, Franklinstrasse 29, 1000 Berlin 10, GDR Search for other works by this author on: Oxford Academic PubMed Google Scholar Mohamed A. Marahiel Mohamed A. Marahiel * Institut für Biochemie und Molekulare BiologieTU Berlin, Franklinstrasse 29, 1000 Berlin 10, GDR * To whom correspondence should be addressed Search for other works by this author on: Oxford Academic PubMed Google Scholar Nucleic Acids Research, Volume 16, Issue 24, 23 December 1988, Page 11841, https://doi.org/10.1093/nar/16.24.11841 Published: 23 December 1988 Article history Accepted: 26 October 1988 Published: 23 December 1988
KINETICS OF HYDROGEN ATOM RECOMBINATION ON SURFACES<sup>1</sup> (1961)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKINETICS OF HYDROGEN ATOM RECOMBINATION ON SURFACES1Bernard J. Wood and Henry WiseCite this: J. Phys. Chem. 1961, 65, 11, 1976–1983Publication Date (Print):November 1, 1961Publication History Published online1 May 2002Published inissue 1 November 1961https://pubs.acs.org/doi/10.1021/j100828a015https://doi.org/10.1021/j100828a015research-articleACS PublicationsRequest reuse permissionsArticle Views953Altmetric-Citations143LEARN 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 options Get e-Alerts
Citrate Modulates Calcium Oxalate Crystal Growth by Face-Specific Interactions (2011)

Because of its ability to inhibit the growth of calcium oxalate monohydrate (COM) crystals, citrate plays an important role in preventing the formation of kidney stones. To determine the mechanism of inhibition, we studied the citrate-COM interaction using a combination of microscopic and simulation techniques. Using scanning confocal interference microscopy, we found that addition of citrate preferentially inhibits crystal growth in <100> and, to a lesser extent, <001> directions, suggesting that citrate adsorbs to the faces of COM in the order {100} > {121} > {010}. Scanning electron microscopy showed that the resulting crystals are plate shaped, with large {100} faces and rounded ends. Molecular-dynamics simulations predicted, however, that citrate interacts with the faces of COM in a different order, i.e. {100} > {010} > {121}. Our simulations showed that citrate molecules align with the rows of Ca²⁺ ions on the {010} face but do not form close contacts, presumably because of electrostatic repulsion by the carboxylate groups that project from the Ca²⁺-rich plane. We propose that this weak interaction is responsible for citrate's limited inhibition of COM growth in <010> directions. Overall, these findings indicate that electrostatic interactions with the Ca²⁺-rich faces of COM crystals are responsible for the growth-modulating properties of citrate.
Optimal Probabilistic Encryption for Secure Detection in Wireless Sensor Networks (2014)

We consider the problem of secure detection in wireless sensor networks operating over insecure links. It is assumed that an eavesdropping fusion center (EFC) attempts to intercept the transmissions of the sensors and to detect the state of nature. The sensor nodes quantize their observations using a multilevel quantizer. Before transmission to the ally fusion center (AFC), the senor nodes encrypt their data using a probabilistic encryption scheme, which randomly maps the sensor's data to another quantizer output level using a stochastic cipher matrix (key). The communication between the sensors and each fusion center is assumed to be over a parallel access channel with identical and independent branches, and with each branch being a discrete memoryless channel. We employ J-divergence as the performance criterion for both the AFC and EFC. The optimal solution for the cipher matrices is obtained in order to maximize J-divergence for AFC, whereas ensuring that it is zero for the EFC. With the proposed method, as long as the EFC is not aware of the specific cipher matrix employed by each sensor, its detection performance will be very poor. The cost of this method is a small degradation in the detection performance of the AFC. The proposed scheme has no communication overhead and minimal processing requirements making it suitable for sensors with limited resources. Numerical results showing the detection performance of the AFC and EFC verify the efficacy of the proposed method.