gebhart/patrepeval huggingface dataset:
Construction of reservoir maps from seismic classifier maps (1990)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1990Construction of reservoir maps from seismic classifier mapsAuthors: Lars SonnelandOlav BarkvedOdd HagenesLars SonnelandGECO A.S, Norway, Olav BarkvedGECO A.S, Norway, and Odd HagenesGECO A.S, Norwayhttps://doi.org/10.1190/1.1890160 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1890160FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 1990ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1990 Pages: 1779 publication data© 1990 Copyright © 1990 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 10 Feb 2005 CITATION INFORMATION Lars Sonneland, Olav Barkved, and Odd Hagenes, (1990), "Construction of reservoir maps from seismic classifier maps," SEG Technical Program Expanded Abstracts : 241-244. https://doi.org/10.1190/1.1890160 Plain-Language Summary PDF DownloadLoading ...
Progress in efficient doping of high aluminum-containing group III-nitrides (2018)

The group III-nitride (InN, GaN, and AlN) class of semiconductors has become one of two that are critical to a number of technologies in modern life—the other being silicon. Light-emitting diodes made from (In,Ga)N, for example, dominate recent innovations in general illumination and signaling. Even though the (In,Ga)N materials system is fairly well established and widely used in advanced devices, challenges continue to impede development of devices that include aluminum-containing nitride films such as (Al,Ga)N. The main difficulty is efficient doping of films with aluminum-rich compositions; the problem is particularly severe for p-type doping, which is essential for Ohmic contacts to bipolar device structures. This review briefly summarizes the fundamental issues related to p-type doping, and then discusses a number of approaches that are being pursued to resolve the doping problem or for circumventing the need for p-type doping. Finally, we discuss an approach to doping under liquid-metal-enabled growth by molecular beam epitaxy. Recent results from a number of groups appear to indicate that p-type doping of nitride films under liquid-metal-enabled growth conditions might offer a solution to the doping problem—at least for materials grown by molecular beam epitaxy.
Using automated analysis of the resting twelve-lead ECG to identify patients at risk of developing transient myocardial ischaemia - an application of an adaptive logic network (1997)

The aim of this study was to introduce an adaptive logic network computing method for detecting patients who were likely to show transient ischaemic episodes during ambulatory Holter monitoring, using parameters from a previously recorded standard twelve-lead resting electrocardiogram (ECG). In the present study, the adaptive logic network computing method is compared with other commonly used classification methods, such as backpropagation network and discriminant analysis techniques. Of 1367 study subjects aged 65 and above, 733 were women and 634 were men. Ambulatory Holter recordings were made to detect episodic ischaemia in study patients. Those subjects showing ischaemic episodes were classified as 'ischaemic' patients, and the remaining subjects were 'non-ischaemic'. Accuracy was 67% using the adaptive logic network computing method, 56% using the backpropagation network computing method, and 65% using statistical discriminant analysis. We concluded that the adaptive logic network technique offers a slightly higher accuracy and shows several potential advantages for automated detection of ischaemia in resting electrocardiograms.
High detectivity InAs quantum dot infrared photodetectors (2004)

We report a high detectivity of 3×1011 cm Hz1/2/W at 78 K for normal-incidence quantum dot infrared photodetectors with ten layers of undoped InAs/InGaAs/GaAs quantum dot active regions. The high detectivity seen at 1.4 V corresponds to photoresponse peaks at 9.3 and 8.7 μm for positive and negative bias, respectively.
Effects of supplementary nutrition in Awassi ewes on sexual behaviors and reproductive traits. (2010)

The present study was conducted to improve sexual behavior in Awassi ewes by the nutritional supplement containing multiple nutrients, such as vitamins, minerals, amino acids and sorbitol. In addition, the purpose of this study was to evaluate the effect of this nutritional supplement on litter size in ewes and birth weight of lambs. Twenty six Awassi ewes (50 ± 3.20 kg), aged 2 to 4 years, and three sexually experienced Awassi rams (90 ± 5.30 kg), aged 3 years, were used. The ewes were sorted by age, body weight and litter size of them in previous years and assigned to one of the two groups (experimental; EG and control; CG). Each group consisted of 13 ewes. The daily ration of the ewes in EG was added 30 g/ewe the nutritional supplement for 5 days before mating period and 5 days during last month of gestation. Despite the fact that there were no statistically differences for sexual behaviors, the number of lambs born, lambing percentage and birth weights of lambs between groups (p > 0.05), our results showed that the combination of nutrients improving animal health and reproduction had a positive effect on embryonic survival, litter size and birth weight.
Stoichiometric and Catalytic Behavior of Cationic Silyl and Silylene Complexes (2002)

Reactions of Ir(III) silyl and silylene complexes with a variety of unsaturated substrates were investigated. The reactivity of these complexes toward small molecules was also examined, and this led to the discovery of a nitrile carbon−carbon bond cleavage under mild conditions. Both silyl and silylene complexes of Ir(III) are precatalysts for catalytic hydrosilylation of ketones, and the mechanism of this reaction is discussed. In the course of studying the catalytic reaction mechanism, analogous new ruthenium silylene complexes of the form [Cp*(PMe3)2Ru(SiR2)][B(C6F5)4] (Cp* = η5-C5Me5, R = iPr, SPh) were prepared. A comparison of [Cp*(PMe3)Ir(SiPh2)(H)][B(C6F5)4] and the known Lewis acid hydrosilylation catalyst B(C6F5)3 is also made.
CaM kinase signaling induces cardiac hypertrophy and activates the MEF2 transcription factor in vivo (2000)

Hypertrophic growth is an adaptive response of the heart to diverse pathological stimuli and is characterized by cardiomyocyte enlargement, sarcomere assembly, and activation of a fetal program of cardiac gene expression. A variety of Ca(2+)-dependent signal transduction pathways have been implicated in cardiac hypertrophy, but whether these pathways are independent or interdependent and whether there is specificity among them are unclear. Previously, we showed that activation of the Ca(2+)/calmodulin-dependent protein phosphatase calcineurin or its target transcription factor NFAT3 was sufficient to evoke myocardial hypertrophy in vivo. Here, we show that activated Ca(2+)/calmodulin-dependent protein kinases-I and -IV (CaMKI and CaMKIV) also induce hypertrophic responses in cardiomyocytes in vitro and that CaMKIV overexpressing mice develop cardiac hypertrophy with increased left ventricular end-diastolic diameter and decreased fractional shortening. Crossing this transgenic line with mice expressing a constitutively activated form of NFAT3 revealed synergy between these signaling pathways. We further show that CaMKIV activates the transcription factor MEF2 through a posttranslational mechanism in the hypertrophic heart in vivo. Activated calcineurin is a less efficient activator of MEF2-dependent transcription, suggesting that the calcineurin/NFAT and CaMK/MEF2 pathways act in parallel. These findings identify MEF2 as a downstream target for CaMK signaling in the hypertrophic heart and suggest that the CaMK and calcineurin pathways preferentially target different transcription factors to induce cardiac hypertrophy.
ABSORPTION OF METAL IONS AND SWELLING PROPERTIES OF POLY(ACRYLIC ACID-CO-ITACONIC ACID) HYDROGELS (2001)

Hydrogels of acrylic acid and itaconic acid has been synthesized with different monomers ratios. The swelling process of the different xerogels immersed in water and salt solutions has been studied. The swelling of hydrogels loaded with metal cations (Cu2+, Zn2+) was also investigated. The swelling process was monitored by the increase in the weight of hydrogel as a function of time. The absorption properties of metal ions were studied by using the hydrogel, and different concentrations of copper and zinc solutions (prepared from sulphate salts). The influence of pH on the absorption process was studied. For the absorption of metal ions, the amount of ions absorbed within the hydrogel can be calculated from the initial and equilibrium concentrations of the metal ions in aqueous phase, the weight of the hydrogel, and the volume of solution used. Metal absorption increased when pH, salt concentration in external solution and itaconic acid content is levelled. The swelling isotherms which consisted of an initial fast increase levelled off asymptotically to the equilibrium swelling limit. The experimental data clearly suggest that our hydrogels follow a second-order kinetics for both cases (unload and metal loaded). The kinetics rate constant and the equilibrium water content, K, have been calculated for every monomer ratio from the experimental data according to the kinetics equation. Both magnitudes decreased as the itaconic acid content decreases in the xerogels.
Invasion of Epithelial Cells by<i>Yersinia pestis</i>: Evidence for a<i>Y. pestis</i>-Specific Invasin (2000)

ABSTRACT The causative agent of plague, Yersinia pestis , is regarded as being noninvasive for epithelial cells and lacks the major adhesins and invasins of its enteropathogenic relatives Yersinia enterocolitica and Yersinia pseudotuberculosis . However, there are studies indicating that Y. pestis invades and causes systemic infection from ingestive and aerogenic routes of infection. Accordingly, we developed a gentamicin protection assay and reexamined invasiveness of Y. pestis for HeLa cells. By optimizing this assay, we discovered that Y. pestis is highly invasive. Several factors, including the presence of fetal bovine serum, the configuration of the tissue culture plate, the temperature at which the bacteria are grown, and the presence of the plasminogen activator protease Pla-encoding plasmid pPCP1, were found to influence invasiveness strongly. Suboptimal combinations of these factors may have contributed to negative findings by previous studies attempting to demonstrate invasion by Y. pestis . Invasion of HeLa cells was strongly inhibited by cytochalasin D and modestly inhibited by colchicine, indicating strong and modest respective requirements for microfilaments and microtubules. We found no significant effect of the iron status of yersiniae or of the pigmentation locus on invasion and likewise no significant effect of the Yops regulon. However, an unidentified thermally induced property (possibly the Y. pestis -specific capsular protein Caf1) did inhibit invasiveness significantly, and the plasmid pPCP1, unique to Y. pestis , was essential for highly efficient invasion. pPCP1 encodes an invasion-promoting factor and not just an adhesin, because Y. pestis lacking this plasmid still adhered to HeLa cells. These studies have enlarged our picture of Y. pestis biology and revealed the importance of properties that are unique to Y. pestis .
Structural Mechanism for Statin Inhibition of HMG-CoA Reductase (2001)

HMG-CoA (3-hydroxy-3-methylglutaryl-coenzyme A) reductase (HMGR) catalyzes the committed step in cholesterol biosynthesis. Statins are HMGR inhibitors with inhibition constant values in the nanomolar range that effectively lower serum cholesterol levels and are widely prescribed in the treatment of hypercholesterolemia. We have determined structures of the catalytic portion of human HMGR complexed with six different statins. The statins occupy a portion of the binding site of HMG-CoA, thus blocking access of this substrate to the active site. Near the carboxyl terminus of HMGR, several catalytically relevant residues are disordered in the enzyme-statin complexes. If these residues were not flexible, they would sterically hinder statin binding.
Epithelial cell polarity in early <i>Xenopus</i> development (1995)

The Xenopus blastula consists of two morphologically distinct cell types. Polarized epithelial cells build up the embryonic surface and fence off an inner non-polarized cell population. We examined the establishment of this early functional cell diversification in the embryo by single cell analysis, in vitro cell culture, and transplantation experiments. Single blastomeres from a 64-cell embryo (1/64 cells) exhibit several features of polarized cells. The plasma membrane of 1/64 cells consists of an apical domain, which is inherited from the original egg membrane, and a basolateral domain derived from newly formed membrane during cleavage. These are inherent, cell-autonomous properties of the blastomeres, as they form and are maintained in blastomeres raised in the absence of any cell interactions in calcium free medium. Upon in vitro culture a single 1/64 cell gives rise to an aggregate of two different cell types. Cells carrying a part of the former egg membrane domain differentiate into polarized epithelial cells, whereas cells lacking this membrane domain are not polarized. These results demonstrate that the inclusion of the egg membrane, rather than external signals related to the position of a cell in the intact embryo, is required for the apical/basolateral differentiation of the surface epithelium. This view is supported by cell transplantation studies. A single 1/64 cell was implanted into the blastocoel of a stage 8 blastula embryo. The progeny of the implanted cell proliferate within the host embryo and split into two morphologically distinct populations with different cell behaviours. Cells incorporating a part of the egg membrane form coherent patches of polarized epithelial cell sheets in the interior of the host embryo. In contrast, cells lacking egg membrane do not exhibit any characteristics of polarized cells and eventually spread into different regions of the host embryo. Our results show that the egg membrane and/or components of the submembrane cortex play a determinative role in the formation of the blastula epithelium.
Source Wanted (1965)

Source Wanted Get access I. Johnson I. Johnson 63 Etheldene Avenue, Muswell Hill, N.10. Search for other works by this author on: Oxford Academic Google Scholar Notes and Queries, Volume 12, Issue 1, 18 January 1965, Page 29, https://doi.org/10.1093/notesj/12.1.29 Published: 18 January 1965
Effects of Improvisational Music Therapy vs Enhanced Standard Care on Symptom Severity Among Children With Autism Spectrum Disorder (2017)

isrctn.org Identifier: ISRCTN78923965.
Threshold-based multicast for continuous media delivery (2001)

In this paper, we propose and evaluate the performance of a continuous media delivery technique, called threshold-based multicast. Similar to patching, threshold-based multicast allows two clients that request the same video to share a channel without having to delay the earlier request. It ensures sharing by permitting the client with the later arrival time to join an ongoing multicast session initiated for the earlier request. However, threshold-based multicast does not allow a later arriving client to always join an ongoing multicast session. If it has been some time since the ongoing multicast session was started, a new multicast session is initiated. That is, a threshold is used to control the frequency at which new multicast sessions are started. We derive the optimal threshold that minimizes the server bandwidth required. Our analytical result shows that threshold-based multicast significantly reduces the server bandwidth requirement. Furthermore, we perform a simulation study demonstrating the performance gain of continuous media delivery by threshold-based multicast.
Electrokinetic pumps and actuators (2000)

Flow and ionic transport in porous media are central to electrokinetic pumping as well as to a host of other microfluidic devices. Electrokinetic pumping provides the ability to create high pressures (to over 10,000 psi) and high flow rates (over 1 mL/min) with a device having no moving parts and all liquid seals. The electrokinetic pump (EKP) is ideally suited for applications ranging from a high pressure integrated pump for chip-scale HPLC to a high flow rate integrated pump for forced liquid convection cooling of high-power electronics. Relations for flow rate and current fluxes in porous media are derived that provide a basis for analysis of complex microfluidic systems as well as for optimization of electrokinetic pumps.
Auto-MPS: an automated master production scheduling system for large volume manufacturing (2002)

The Automated Master Production Scheduler (Auto-MPS) is a hybrid expert scheduling system which performs production scheduling of thousands of assemblies in a high-volume manufacturing environment. It generates schedules based on a set of rules and constraint satisfaction algorithms which reflect the scheduling strategies created by management to meet their customer demand while still controlling inventory and shipping costs. The Auto-MPS also identifies the existence of significant situations which need to be analyzed by management. A graphical user interface that includes sophisticated graphical displays and hypertext based editors allows the user to easily understand the status of the current production schedules and rapidly identify and analyze potential problems. The Auto-MPS has been in production for nearly two years and has significantly improved the scheduling processes at AlliedSignal Safety Restraint Systems.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A Convenient Synthesis of 3,4-Disubstituted-1,2,4-Thiadiazole-5(4H)-Thiones (1998)

3,4-Disubstituted-1,2,4-oxadiazole-5(4H)-ones were obtained from the reaction of substituted amide oximes with ethylchloroformate. These compounds were treated with P2S5 to give corresponding 1,2,4-oxadiazole-5-thiones. Rearrangement of 1,2,4-oxadiazole-5-thiones, catalysed by metallic copper, yielded 1,2,4-thiadiazole-5-ones. The reaction of 1,2,4-thiadiazole-5-ones with P2S5 gave 1,2,4-thiadiazole-5-thiones.
Dynamics of<i>Salmonella</i>small RNA expression in non-growing bacteria located inside eukaryotic cells (2012)

Small non-coding regulatory RNAs (sRNAs) have been studied in many bacterial pathogens during infection. However, few studies have focused on how intracellular pathogens modulate sRNA expression inside eukaryotic cells. Here, we monitored expression of all known sRNAs of Salmonella enterica serovar Typhimurium (S. Typhimurium) in bacteria located inside fibroblasts, a host cell type in which this pathogen restrains growth. sRNA sequences known in S. Typhimurium and Escherichia coli were searched in the genome of S. Typhimurium virulent strain SL1344, the subject of this study. Expression of 84 distinct sRNAs was compared in extra- and intracellular bacteria. Non-proliferating intracellular bacteria upregulated six sRNAs, including IsrA, IsrG, IstR-2, RyhB-1, RyhB-2 and RseX while repressed the expression of the sRNAs DsrA, GlmZ, IsrH-1, IsrI, SraL, SroC, SsrS(6S) and RydC. Interestingly, IsrH-1 was previously reported as an sRNA induced by S. Typhimurium inside macrophages. Kinetic analyses unraveled changing expression patterns for some sRNAs along the infection. InvR and T44 expression dropped after an initial induction phase while IstR-2 was induced exclusively at late infection times (> 6 h). Studies focused on the Salmonella-specific sRNA RyhB-2 revealed that intracellular bacteria use this sRNA to regulate negatively YeaQ, a cis-encoded protein of unknown function. RyhB-2, together with RyhB-1, contributes to attenuate intracellular bacterial growth. To our knowledge, these data represent the first comprehensive study of S. Typhimurium sRNA expression in intracellular bacteria and provide the first insights into sRNAs that may direct pathogen adaptation to a non-proliferative state inside the host cell.
A compact positioning and velocity RF sensor for improved inertial navigation (2009)

Navigation in GPS-denied or GPS-inhibited environments such as urban canyons, mountain areas, and indoors is often accomplished with an Inertial Measurement Unit (IMU). For portable navigation, minaturized IMUs suffer from poor accuracy due to bias, bias drift and noise. We propose to use a compact RF motion sensor to identify zero velocity periods during which the individual IMU sensor biases can be observed. The proposed motion sensor can also be used to detect the position and velocity of the IMU relative to the ground in real time, which provides additional independent information for sensor fusion. A prototype RF motion sensor has been constructed to demonstrate the concept and experimental results show that the proposed RF motion sensor is promising in position and velocity sensing.
Void and phase evolution during the processing of Bi-2212 superconducting wires monitored by combined fast synchrotron micro-tomography and x-ray diffraction (2011)

Recent study of the current-limiting mechanisms in Bi-2212 round wires has suggested that agglomeration of the residual Bi-2212 powder porosity into bubbles of filament-diameter size occurs on melting the Bi-2212 filaments. These pores introduce a major obstacle to current flow, which greatly reduces the critical current density (Jc). Here we present an in situ non-destructive tomographic and diffraction study of the changes occurring during the heat treatment of wires and starting powder, as well as a room temperature study of ex situ processed wires. The in situ through-process study shows that the agglomeration of residual porosity is more complex than previously seen. Filament changes start with coalescence of the quasi-uniform and finely divided powder porosity into lens-shaped defects at about 850 °C when the Bi-2201 impurity phase decomposes before the Bi-2212 starts to melt. These lens-shaped voids grow to bubbles of a filament diameter on melting of the Bi-2212 and continue to lengthen and then to agglomerate across multiple filaments while the filaments are in the liquid state. The experiment makes clear why melt processing is vital to developing high Jc and also shows how rearrangement of the residual filament porosity on melting imposes a strong longitudinal inhomogeneity in each filament. Reducing the bubble density is clearly an important path to reaching much higher Jc values in Bi-2212 round wires. Synchrotron micro-tomography is an exceptionally powerful technique for studying the spatial extent of the porosity on a scale of about 2 µm and larger.
An examination of recovery time of an integrated limiter/LNA (2004)

GaAs monolithic microwave integrated circuits (MMICs) are widely used in commercial and military microwave systems. Due to the fine geometry used in MMIC transistors, these circuits are susceptible to damage from high-power spurious electromagnetic (EM) radiation, either from microwave transmitters or nuclear electromagnetic pulse. Especially, low noise amplifiers (LNAs) in the front-end of microwave systems need high power protection because these amplifiers can sustain only low input power levels in the range of 10-20 dBm continuous wave (CW). To protect these circuits and maintain low noise figure, a high power and low loss limiter is required. The purpose of this application note is to document the test methodology employed and test results achieved measuring the small-signal gain recovery time of a balanced LNA with an integrated Schottky diode limiter and high power load.