gebhart/patrepeval huggingface dataset:
A Neural Network Model for Predicting the Dielectric Permittivity of Epoxy- Aluminum Nanocomposite and Its Experimental Validation (2015)

The dielectric properties of epoxy nanocomposites with oxide-coated aluminum nanofillers were investigated at relatively low filler concentrations. The dielectric permittivities of the nanocomposites at different filler concentrations were evaluated and the optimum filler concentration was experimentally determined for two different size fillers, viz. 70 and 40 nm. Since the experiments could be conducted with only some discrete sizes and percentage of nanoparticles, an artificial neural network model was developed to predict the dielectric permittivities of the nanocomposites with different size fillers at different filler concentrations. For training the neural network model, the experimental results obtained for 70 nm nanocomposites were used. After training and validation, this model is capable of predicting the dielectric constant of the nanocomposite for any filler size at different filler concentrations. This is proved by comparing the predicted values for 40-nm composites with the corresponding experimental values. The results show that predicted values and experimental values match well at low filler concentrations. Using this model, the dielectric permittivities of the nanocomposites with fillers of varying size and concentration can be predicted.
Norrbottenskommunismen och sabotagefaran. (1950)

Journal Article Norrbottenskommunismen och sabotagefaran Get access Norrbottenskommunismen och sabotagefaran. From Dagens Nyheter. Stockholm, Albert Bonniers, 1949. 44 pp. 7′​′×434′​′Kr.1.25. J. K. H. J. K. H. Search for other works by this author on: Oxford Academic Google Scholar International Affairs, Volume 26, Issue 4, October 1950, Page 566, https://doi.org/10.2307/2607200 Published: 01 October 1950
The International Intercomparison of SAR Measurements on Cellular Telephones (2009)

This paper describes the results of an international intercomparison of specific absorption rate (SAR) measurements made with actual wireless telephones, following a similar program involving standard dipole antennas and flat phantoms. This study involved 17 laboratories in 11 different countries. All the participating laboratories supplied their data to the University of Maryland. The test of the reliability of dosimetric assessments involved an intercomparison of SAR measurements made in a head phantom filled with simulant fluid. These measurements are made using small electric field probes placed in the head phantoms. Two different wireless phones, a Motorola Model V290 and a Nokia Model 6310, were circulated to each participating laboratory, which provided its own electric field probes, head phantom, base station emulator to activate the phones, scanning system, and a simulant fluid prepared to a required prescription. The measurement technique to be followed was guided by the specifications given in the IEEE 1528 Compliance standard. At the conclusion of each laboratory's measurements, its results were communicated to the coordinators including 1 and 10 g maximum SARs for each phone at both 900 and 1800 MHz, and for the left and right cheeks, and left and right tilt positions relative to the phantom.
New burlesque et post-féminisme. Entre régression et transgression (2012)

Les images ont été supprimées pour la diffusion.
Distributed structural health monitoring system based on smart wireless sensor and multi-agent technology (2005)

This paper presents a new parallel distributed structural health monitoring technology based on the wireless sensor network and multi-agent system for large scale engineering structures. The basic idea of this new technology is that of adopting the smart wireless sensor with on-board microprocessor to form the monitoring sensor network and the multi-agent technology to manage the whole health monitoring system. Using this technology, the health monitoring system becomes a distributing parallel system instead of a serial system with all processing work done by the central computer. The functions, the reliability, the flexibility and the speed of the whole system will be greatly improved. In addition, with wireless communication links instead of wires, the system weight and complexity will be lowered. In this paper, the distributed smart wireless sensor network is designed first based on the Berkeley Mote Mica wireless sensor platform. Two kinds of sensor have been adopted: piezoelectric sensors and electric resistance wires. They are connected to a Mica MPR board though a designed charge amplifier circuit or bridge circuit and MTS101 board. Seven kinds of agents are defined for the structural health monitoring system. A distributed health monitoring architecture based on the defined agents is proposed. Finally, a composite structural health monitoring system based on a Mica wireless platform and multi-agent technology is developed to evaluate the efficacy of the new technology. The developed system can successfully monitor the concentrated load position or a loose bolt position.
Unusual Influence of the Structures of Transition Metal Complexes on Catalytic C–S and C–Se Bond Formation Under Homogeneous and Heterogeneous Conditions (2007)

Abstract In the presence of transition metal catalysts, hydrothiolation and hydroselenation reactions, as well as bisthiolation and bisselenation reactions, have been successfully carried out with high selectivities and yields. New transition metal‐catalyzed synthetic methods have been developed for the preparation of vinyl sulfides and vinyl selenides of various types. Mechanistic study has revealed that a homogeneous catalytic system based on phosphine complexes of palladium is the best choice for carrying out stereoselective additions of disulfides and diselenides to alkynes. A heterogeneous Ni‐catalyzed reaction with a unique self‐organized nanostructured catalyst was superior for carrying out regioselective additions of thiols and selenols to alkynes.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Gene Transfer to the Desiccation-Tolerant Cyanobacterium <i>Chroococcidiopsis</i> (2001)

ABSTRACT The coccoid cyanobacterium Chroococcidiopsis dominates microbial communities in the most extreme arid hot and cold deserts. These communities withstand constraints that result from multiple cycles of drying and wetting and/or prolonged desiccation, through mechanisms which remain poorly understood. Here we describe the first system for genetic manipulation of Chroococcidiopsis . Plasmids pDUCA7 and pRL489, based on the pDU1 replicon of Nostoc sp. strain PCC 7524, were transferred to different isolates of Chroococcidiopsis via conjugation and electroporation. This report provides the first evidence that pDU1 replicons can be maintained in cyanobacteria other than Nostoc and Anabaena . Following conjugation, both plasmids replicated in Chroococcidiopsis sp. strains 029, 057, and 123 but not in strains 171 and 584. Both plasmids were electroporated into strains 029 and 123 but not into strains 057, 171, and 584. Expression of P psb A - luxAB on pRL489 was visualized through in vivo luminescence. Efficiencies of conjugative transfer for pDUCA7 and pRL489 into Chroococcidiopsis sp. strain 029 were approximately 10 −2 and 10 −4 transconjugants per recipient cell, respectively. Conjugative transfer occurred with a lower efficiency into strains 057 and 123. Electrotransformation efficiencies of about 10 −4 electrotransformants per recipient cell were achieved with strains 029 and 123, using either pDUCA7 or pRL489. Extracellular deoxyribonucleases were associated with each of the five strains. Phylogenetic analysis, based upon the V6 to V8 variable regions of 16S rRNA, suggests that desert strains 057, 123, 171, and 029 are distinct from the type species strain Chroococcidiopsis thermalis PCC 7203. The high efficiency of conjugative transfer of Chroococcidiopsis sp. strain 029, from the Negev Desert, Israel, makes this a suitable experimental strain for genetic studies on desiccation tolerance.
Reperfusion injury to endothelial cells following cold ischemic storage of rat livers (1989)

Storage of donor livers in Euro-Collins solution for human transplantation surgery is limited to about 8 hr. Here, tissue damage to isolated rat livers stored under the same conditions as human livers was characterized following reperfusion. The purpose of this work was to determine the importance of nutritional status on injury due to cold storage and reperfusion, to establish whether lethal injury occurs during cold storage or only after reperfusion, and to identify the cell types most vulnerable to damage. Rat livers were perfused with Krebs-Henseleit-bicarbonate buffer, stored 8 to 48 hr in Euro-Collins solution and reperfused with warm, oxygenated Krebs-Henseleit buffer for 15 min. Nuclear trypan blue uptake and lactate dehydrogenase release were used as indices of cell death. After 8 hr of cold storage and reperfusion, little loss of parenchymal or nonparenchymal viability occurred. After 24 or 48 hr, virtually all parenchymal cells remained viable. However, severe damage to nonparenchymal cells was observed, and about 40% of nonparenchymal cells were trypan blue positive. Nutritional status (fed vs. fasted) did not affect the extent of cell damage. Nonparenchymal cell killing was accompanied by cellular rounding, nuclear pyknosis and protrusion of cells into sinusoidal lumens. Scanning electron micrographs demonstrated denudation of the sinusoidal lining. Rounding and pyknosis were not observed in 24-hr-stored livers which were not reperfused, and trypan blue uptake did not occur in stored livers infused with cold, anoxic Euro-Collins solution. Based on cytochemistry and electron microscopy, lethal cell injury occurred predominantly to endothelial cells.(ABSTRACT TRUNCATED AT 250 WORDS)
Children's Interpersonal Perceptions as a Function of Sociometric and Peer-Perceived Popularity (1999)

Abstract This study extends previous research on the distinction between sociometric popularity and peer-perceived popularity among middle school children. The accuracy and consensus of children's perceptions regarding popularity were examined. A sample of 135 4th- and 5th-grade children (81 girls and 54 boys) answered questions about whom they liked, whom they disliked, who they believed was popular, and who they believed was unpopular in their class. Consistent with past research, results showed a discrepancy between classifications based on sociometric popularity and those based on peer-perceived popularity. Furthermore, girls demonstrated somewhat higher levels of accuracy than boys in identifying who was perceived as popular or unpopular by the class, and unpopular children evidenced less consensus with the rest of the class in whom they liked and disliked. Results are discussed in terms of the predictive utility of the alternative form of classification based on children's perceived status rather than sociometric status in the group.
4‐Chloroprolines: Synthesis, conformational analysis, and effect on the collagen triple helix (2007)

Collagen is an abundant, triple-helical protein comprising three strands of the repeating sequence: Xaa-Yaa-Gly. (2S)-Proline and (2S,4R)-4-hydroxyproline (Hyp) are common in the primary structure of collagen. Here, we use nonnatural proline derivatives to reveal determinants of collagen stability. Specifically, we report high-yielding syntheses of (2S,4S)-4-chloroproline (clp) and (2S,4R)-4-chloroproline (Clp). We find that the molecular structure of Ac-Clp-OMe in the solid state is virtually identical to that of Ac-Hyp-OMe. In contrast, the conformational properties of Ac-clp-OMe are similar to those of Ac-Pro-OMe. Ac-Clp-OMe has a stronger preference for a trans amide bond than does Ac-Pro-OMe, whereas Ac-clp-OMe has a weaker preference. (Pro-Clp-Gly)(10) forms triple helices that are significantly more stable than those of (Pro-Pro-Gly)(10). Triple helices of (clp-Pro-Gly)(10) have stability similar to those of (Pro-Pro-Gly)(10). Unlike (Pro-Clp-Gly)(10) and (clp-Pro-Gly)(10), (clp-Clp-Gly)(10) does not form a stable triple helix, presumably due to a deleterious steric interaction between proximal chlorines on different strands. These data, which are consistent with previous work on 4-fluoroprolines and 4-methylprolines, support the importance of stereoelectronic and steric effects in the stability of the collagen triple helix and provide another means to modulate that stability. (
A gene homologous to Saccharomyces cerevisiae SNF1 appears to be essential for the viability of Candida albicans (1997)

The SNF1 gene of Saccharomyces cerevisiae (ScSNF1) is essential for the derepression of catabolic repression. We report here the isolation and characterization of an SNF1 homolog from Candida albicans (CaSNF1) which is apparently essential for the viability of this organism. The putative amino acid sequence of CaSNF1 has 68% identity with that of ScSNF1 and can restore the S. cerevisiae snf1 delta mutant's ability to utilize sucrose. Disruption of one of the CaSNF1 alleles resulted in morphological changes and decreased growth rates but did not modify the carbon source utilization pattern. Repetitive unsuccessful attempts to generate a snf1/snf1 homozygote by disruption of the second allele, using various vectors and approaches, suggest the lethal nature of this mutation. Integration into the second allele was possible only when a full-length functional SNF1 sequence was reassembled, further supporting this hypothesis and indicating that the indispensability of Snf1p prevented the isolation of snf1/snf1 mutants. The mutant bearing two disrupted SNF1 alleles and the SNF1 functional sequence maintained its ability to utilize sucrose and produced stellate colonies with extensive hyphal growth on agar media. It was demonstrated that in a mouse model, the virulences of this mutant and the wild-type strain are similar, suggesting that hyphal growth in vitro is not an indicator for higher virulence.
Fluorescence sensing of intermolecular interactions and development of direct molecular biosensors (2006)

Molecular biosensors are devices of molecular size that are designed for sensing different analytes on the basis of biospecific recognition. They should provide two coupled functions - the recognition (specific binding) of the target and the transduction of information about the recognition event into a measurable signal. The present review highlights the achievements and prospects in design and operation of molecular biosensors for which the transduction mechanism is based on fluorescence. We focus on the general strategy of fluorescent molecular sensing, construction of sensor elements, based on natural and designed biopolymers (proteins and nucleic acids). Particular attention is given to the coupling of sensing elements with fluorescent reporter dyes and to the methods for producing efficient fluorescence responses.
A design of VSB receiver IC for digital television (1999)

This paper describes a single ASIC chip that demodulates and decodes vestigial side band (VSB) digital TV signals. The VSB IC has been implemented for the receiver based on the ATSC digital TV standard. It features fast digital carrier recovery and robust channel equalization. The IC is fabricated with 0.35 /spl mu/m CMOS technology with 3 metal layers. It can be applied to both modes of signal reception -8 VSB for terrestrial broadcast and 16 VSB for cable transmission.
Bacteriophage T4 MotA and AsiA proteins suffice to direct Escherichia coli RNA polymerase to initiate transcription at T4 middle promoters. (1995)

Development of bacteriophage T4 in Escherichia coli requires the sequential recognition of three classes of promoters: early, middle, and late. Recognition of middle promoters is known to require the motA gene product, a protein that binds specifically to the "Mot box" located at the -30 region of these promoters. In vivo, the asiA gene product is as critical for middle mode RNA synthesis as is that of the motA gene. In vitro, AsiA protein is known to loosen the sigma 70-core RNA polymerase interactions and to inhibit some sigma 70-dependent transcription, presumably through binding to the sigma 70 subunit. Here we show that, in vitro, purified MotA and AsiA proteins are both necessary and sufficient to activate transcription initiation at T4 middle promoters by the E. coli RNA polymerase in a sigma 70-dependent manner. AsiA is also shown to inhibit recognition of T4 early promoters and may play a pivotal role in the recognition of all three classes of phage promoters.
Cyclic vs Continuous Enteral Feeding With ω‐3 and γ‐Linolenic Fatty Acids: Effects on Modulation of Phospholipid Fatty Acids in Rat Lung and Liver Immune Cells (1997)

Given the rapid changes in lung and liver immune cell phospholipid fatty acids, short-term provision of EPA and GLA-enriched diets cyclically or continuously may prove clinically relevant for modulating the fatty acid composition and potential eicosanoid formation by these cells.
Purchasing and Supply Management: Trends and Changes Throughout the 1990s (1998)

Understanding the changes and trends affecting purchasing requires replacing anecdotal evidence with research‐based observations. Using data collected annually from leading firms worldwide, this article details the real and projected changes and trends that have affected and will continue to affect purchasing and sourcing professionals. These changes and trends appear within seven areas: (1) performance improvement requirements, (2) supplier and purchasing/sourcing importance, (3) organization, (4) systems development, (5) performance measurement, (6) supply base management, and (7) purchasing responsibilities and activities. A lack of awareness concerning these trends by purchasing professionals limits their ability to anticipate change and respond in a way that will create competitive advantage for their organization.
Partial Purification and Properties of S-Adenosylmethionine: (R), (S)-Norlaudanosoline-6-O-Methyltransferase from Argemone platyceras Cell Cultures (1983)

A new enzyme, S-adenosylmethionine: (R), (S)-norlaudanosoline-6-O-methyltransferase, was isolated from the soluble protein extract of A. PLATYCERAS cell cultures and purified approximately 80-fold. This enzyme catalyses the formation of 6-O-methylnorlaudanosoline, and, to a minor extent, 7-O-methylnorlaudanosoline from SAM and (S), as well as (R), norlaudanosoline. The apparent molcular weight of the enzyme is 47000 Dalton. The pH-optimum of the enzyme is 7.5, the temperature optimum, 35 degrees C. Apparent K (M) values for (S) and (R)-norlaudanosoline were 0.2 mM, and for SAM, 0.05 mM. The transferase shows high substrate specificity for tetrahydrobenzylisoquinoline alkaloids. Simple orthophenols, like phenylpropane derivatives, coumarins or flavonoids, are not accepted as substrates. The enzyme is widely distributed in benzylisoquinoline-containing plant cell cultures and is present in differentiated plants like PAPAVER SOMNIFERUM.
Process Development of 5-Fluoro-3-[3-[4-(5-methoxy-4-pyrimidinyl)-1- piperazinyl]propyl]-1<i>H</i>-indole Dihydrochloride (1997)

5-Fluoro-3-[3-[4-(5-methoxy-4-pyrimidinyl)-1-piperazinyl]propyl]-1H-indole dihydrochloride (1) facilitates 5-HT neurotransmission and was an antidepressant drug candidate. The development of a safe, rugged process for the large-scale, chromatography-free preparation of this compound is described. The main areas of optimization included a Fischer indole synthesis, preparation and chlorination of a monohydroxypyrimidine, and coupling of the resultant fragments to prepare the drug substance.
Priority based packet reservation demand assignment TDMA system (1983)

Abstract This paper proposes a Priority‐based Packet Reservation Demand Assignment TDMA (PR‐TDMA) system by dividing the TDMA channels into two kinds of channels. They are fixed assigned channels and demand assigned channels; in this way it is possible to integrate various communication services such as interactive data, voice, video, file, etc. in satellite packet communications. We have classified the user traffic into three classes. the fixed assigned TDMA channels are used for interactive data and reservation information, while the demand assigned channels are used for bursty file and video, and real time voice transmission by reserving demand assigned channels. the coexistence of two forms of traffic, traffic requiring high speed transmission capacity and traffic requiring time transparency, is made possible by reserving the channels on the basis of slot length and repeated frame period. an access algorithm and an approximate analytic model are described for the evaluation of channel utilization and message delay. Theoretical results are examined by computer simulation and design trade‐offs are considered.
Control of a center-node unified power flow controller in transmission line applications (2002)

The modeling, analysis and linearizing control of a new device, the center-node unified power flow controller (C-UPFC), fitted at the midpoint of a transmission line is the theme of this paper. C-UPFC consists of a rectifier connected through an excitation transformer to the midpoint of the line and two inverters whose outputs are connected through series transformers with the transmission line. The output of the rectifier through a coupling DC capacitor sources the inverters. With six independent control variables, it is shown that both the source and load real and reactive powers can be controlled in addition to maintaining the transmission line midpoint and DC capacitor voltages at specified voltage magnitudes, ensuring complete system controllability and maximum power transfer. Performance curves and dynamic simulation results are given which show the control possibilities and the usefulness of the linearizing control scheme.
Unbalance Response of a Two Spool Gas Turbine Engine With Squeeze Film Bearings (1981)

This paper presents a dynamic analysis of a two-spool gas turbine helicopter engine incorporating intershaft rolling element bearings between the gas generator and power turbine rotors. The analysis includes the nonlinear effects of a squeeze film bearing incorporated on the gas generator rotor. The analysis includes critical speeds and forced response of the system and indicates that substantial dynamic loads may be imposed on the intershaft bearings and main bearing supports with an improperly designed squeeze film bearing. A comparison of theoretical and experimental gas generator rotor response is presented illustrating the nonlinear characteristics of the squeeze film bearing. It was found that large intershaft bearing forces may occur even though the engine is not operating at a resonant condition.
Design, Preparation, X-ray Crystal Structure, and Reactivity of <i>o</i>-Alkoxyphenyliodonium Bis(methoxycarbonyl)methanide, a Highly Soluble Carbene Precursor (2012)

The preparation, X-ray structure, and reactivity of new, highly soluble, and reactive iodonium ylides derived from malonate methyl ester and bearing an ortho substituent on the phenyl ring are reported. These new reagents show higher reactivity than common phenyliodonium ylides in the Rh-catalyzed cyclopropanation, C-H insertion, and transylidation reactions under homogeneous conditions.