gebhart/patrepeval huggingface dataset:
Silicon/silicon oxide and silicon/silicon nitride multilayers for XUV optical applications (1991)

Si/Si02 and Si/Si3N4 multilayers have been fabricated using a locally made reactive diode if-sputtering systern. 'Ihe layer alternation is obtained by modulating a partial pressure of oxygen or nitrogen near the sample using a silicon target and argon as sputtering gas. 02 and N2 partial pressure conditions were optimized to deposit stoechiornetric Si02 and Si3TV4 films without significant reaction with the silicon target. In-situ kinetic ellipsometry was used to monitore both thick film and multilayer deposition. 'I'he different interfaces appear very sharp with a little contamination of the silicon layers especially using oxygen. The multilayers were characterized by gazing X-ray reflection ( Cu - K line ), and the reflectivity was measured in the soft X-ray range (120 - 350 A ) by synchrolroii radiation. BotI1 Si/Si02 and SiIS13N4 multilayers exhibit well defmed Bragg peaks with very narrow bandpasses ( two to three times lower than the conventional M'/Si multilayer ),and high absolute reflectivities (up to 22% at 1 30 A ). The soft X-ray performances of these mirrors are explained using the physical characteristics deduced from kinetic ellipsometry, grazing X-ray reflection, infrared absorption and transmission electron microscopy measurements.
Plant Diversity and Carbon Storage Assessment in an African Protected Forest: A Case of the Eastern Part of the Dja Wildlife Reserve in Cameroon (2016)

Although the forests of the Congo basin are known for their richness in species, there are still several works in assessing their biomass. Mindful of this fact, the present study performed in the Dja biosphere reserve aims to assess plant diversity and carbon stocks. 10 transects of 5 ha each were assessed. 9,293 individuals divided into 47 families, 150 genera and 205 species were recorded. Euphorbiaceae was the most important family. The overall carbon stocks assessed was, 354.73 Mg C/ha. In the secondary forest the quantity of carbon stocks evaluated was 330.67±40.07 Mg C/ha. The Raphiales and Wetlands accumulated a quantity of carbon stocks of 15.06±0.08 and 9.00±2.06 Mg C/ha respectively. Euphorbiaceae stored an amount of 68.38 Mg C/ha, followed by the Mimosaceae which stores the amount of 51.07 Mg C/ha and the Irvingiaceae which stores an amount of 26.07 Mg C/ha. Uapaca guineensis stored 53.60 Mg C/ha. Pentaclethra macrophylla, Petersianthus macrocarpus and Desbordesia glaucescens all stored 117.56 Mg C/ha. For an index of diversity of 3.71, secondary forest stores approximately 93% of the total carbon stock. The test of comparison carried out showed a significant difference between the carbon stocks obtained on the land cover type (LCT) (ANOVA, F = 45.76; P < 0.001).
Negative Protein 1, Which Is Required for Function of the Chicken Lysozyme Gene Silencer in Conjunction with Hormone Receptors, Is Identical to the Multivalent Zinc Finger Repressor CTCF (1997)

The transcriptional repressor negative protein 1 (NeP1) binds specifically to the F1 element of the chicken lysozyme gene silencer and mediates synergistic repression by v-ERBA, thyroid hormone receptor, or retinoic acid receptor. Another protein, CCCTC-binding factor (CTCF), specifically binds to 50-bp-long sequences that contain repetitive CCCTC elements in the vicinity of vertebrate c-myc genes. Previously cloned chicken, mouse, and human CTCF cDNAs encode a highly conserved 11-Zn-finger protein. Here, NeP1 was purified and DNA bases critical for NeP1-F1 interaction were determined. NeP1 is found to bind a 50-bp stretch of nucleotides without any obvious sequence similarity to known CTCF binding sequences. Despite this remarkable difference, these two proteins are identical. They have the same molecular weight, and NeP1 contains peptide sequences which are identical to sequences in CTCF. Moreover, NeP1 and CTCF specifically recognize each other's binding DNA sequence and induce identical conformational alterations in the F1 DNA. Therefore, we propose to replace the name NeP1 with CTCF. To analyze the puzzling sequence divergence in CTCF binding sites, we studied the DNA binding of 12 CTCF deletions with serially truncated Zn fingers. While fingers 4 to 11 are indispensable for CTCF binding to the human c-myc P2 promoter site A, a completely different combination of fingers, namely, 1 to 8 or 5 to 11, was sufficient to bind the lysozyme silencer site F1. Thus, CTCF is a true multivalent factor with multiple repressive functions and multiple sequence specificities.
Serum C-reactive protein concentration in acute myocardial infarction and its relationship to mortality during 24 months of follow-up in patients under thrombolytic treatment (1996)

High serum C-reactive protein concentrations in acute myocardial infarction patients treated with thrombolytic drugs predict increased mortality up to 6 months following the infarction. Accordingly, reduction of inflammatory reaction by successful thrombolytic treatment may make an important contribution to the survival benefit of thrombolytic treatment of acute myocardial infarction.
Generation of oxidative stress contributes to the development of pulmonary hypertension induced by hypoxia (2001)

Chronic hypoxia causes pulmonary hypertension and right ventricular hypertrophy associated with pulmonary vascular remodeling. Because hypoxia might promote generation of oxidative stress in vivo, we hypothesized that oxidative stress may play a role in the hypoxia-induced cardiopulmonary changes and examined the effect of treatment with the antioxidant N-acetylcysteine (NAC) in rats. NAC reduced hypoxia-induced cardiopulmonary alterations at 3 wk of hypoxia. Lung phosphatidylcholine hydroperoxide (PCOOH) increased at days 1 and 7 of the hypoxic exposure, and NAC attenuated the increase in lung PCOOH. Lung xanthine oxidase (XO) activity was elevated from day 1 through day 21, especially during the initial 3 days of the hypoxic exposure. The XO inhibitor allopurinol significantly inhibited the hypoxia-induced increase in lung PCOOH and pulmonary hypertension, and allopurinol treatment only for the initial 3 days also reduced the hypoxia-induced right ventricular hypertrophy and pulmonary vascular thickening. These results suggest that oxidative stress produced by activated XO in the induction phase of hypoxic exposure contributes to the development of chronic hypoxic pulmonary hypertension.
Retinobenzoic Acids and Nuclear Retinoic Acid Receptors. (1991)

Retinoids (retinoic acid and its analogs) are widely involved in the control of cell proliferation, cell differentiation and embryonic development. A series of potent and novel synthetic retinoids named retinobenzoic acids has been developed. Retinobenzoic acids have proven to be useful tools in the investigation of the molecular mechanisms of retinoidal actions. Retinoids elicit their biological effects by binding to and activating specific nuclear receptors for retinoids (RAR's) which belong to the steroid/thyroid nuclear receptor superfamily. Recent investigations concerning the structure and function of nuclear receptors, namely of RAR's, are reviewed. Three subtypes of RAR (RAR-alpha, RAR-beta and RAR-gamma) have been identified so far. Each RAR is considered to play particular roles in the retinoidal actions. The role of each RAR is discussed in relation to their features and to the structure-activity relationships of retinoids. RAR's act as retinoid-dependent transcription factors which bind to a specific site of the gene and control its expression. Recent progress in the investigation of the interaction of RAR's with the responsive genes and with nuclear co-factors is reviewed. The diversity of retinoidal actions are possibly explained by the diversity of RAR's in their structure and in their spatial and temporal distribution, by the diversity of base sequences which interact with RAR's, by the diversity of cell type-specifically determined hierarchy of gene expression, and by the diversity of the nuclear factors which interact with RAR's.
Real-Time Embedded System for Gesture Recognition (2018)

Recognition from body movement is a challenging domain of research that lies at an intersection of machine learning, biometric security and cognitive functions domain. It can be highly beneficial for expert systems, lie detectors, border control, medical emergencies, as well as search and rescue operations. This paper describes a first prototype of a real-time system capable of recognizing four gestures that correlate to human emotions based on the arm movements. Features extracted from the 3D skeleton using Kinect v2 sensor are classified using an SVM method. The system is tested in real-time on a Kinect database with the embedded system using an optimized algorithm for skeleton extraction in real-time.
Bound analysis of closed queueing networks with workload burstiness (2008)

Burstiness and temporal dependence in service processes are often found in multi-tier architectures and storage devices and must be captured accurately in capacity planning models as these features are responsible of significant performance degradations. However, existing models and approximations for networks of first-come first-served (FCFS) queues with general independent (GI) service are unable to predict performance of systems with temporal dependence in workloads. To overcome this difficulty, we define and study a class of closed queueing networks where service times are represented by Markovian Arrival Processes (MAPs), a class of point processes that can model general distributions, but also temporal dependent features such as burstiness in service times. We call these models MAP queueing networks. We introduce provable upper and lower bounds for arbitrary performance indexes (e.g., throughput, response time, utilization) that we call Linear Reduction (LR) bounds. Numerical experiments indicate that LR bounds achieve a mean accuracy error of 2 percent. The result promotes LR bounds as a versatile and reliable bounding methodology of the performance of modern computer systems.
Immune Response of Human Propagated γδ-T-Cells to Neuroblastoma Recommend the Vδ1+ Subset for γδ-T-cell–based Immunotherapy (2008)

Human peripheral gammadelta-T-cells are able to induce cytolysis of neuroblastoma (Nb) tumor cells. Besides innate effector functions against infected cells and tumors, gammadelta-T-cells are involved in T-helper 1/T-helper 2 (TH1/TH2) differentiation of alphabeta-T-cells. However, as different gammadelta-T-cell subsets vary considerably in their functional properties, the aim of the present study was to define repertoires of cytokines, chemokines, and angiogenic factors of in vitro expanded Vdelta1+ and Vdelta2+ T cells in response to Nb. After short-term culture, both subsets released TH1 [interleukin (IL)-2, interferon (IFN)-gamma, IL-12, tumor necrosis factor (TNF)-alpha, TNF-beta)] and TH2 cytokines (IL-4, -5, -6, -10, -13, Vdelta1 also transforming growth factor (TGF)-beta, chemokines (I-309, monocyte chemotactic protein (MCP)-1-3, regulated upon activation, normal T-cell expressed and secreted), ILs (IL-1, -8, -15), cytokines (leptin) as well as angiogenic growth factors [angiogenin (ANG), vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), Insulin-like growth factor (IGF)-I]. These molecules were expressed at higher levels in Vdelta2+ than Vdelta1+ T cells. Nb challenge changed protein expression. TH2 cytokine and IFN-gamma release was blocked in both gammadelta-T-cell subsets. In Vdelta2 gammadelta-T-cells, TH1 cytokines were down-regulated and tumor growth-promoting factors (ANG, VEGF, EGF, and IGF-I) were strongly up-regulated. In contrast, Vdelta1+ gammadelta-T-cells stopped the release of tumor-supportive factors and tolerogenic TGF-beta, and strongly up-regulated TNF-alpha, TNF-beta, MCP-1 and -2 and maintained their IL-2 production. In summary, our data show that after being challenged with Nb cells, propagated Vdelta1+ rather than Vdelta2+ T cells support antitumor responses by secretion of proinflammatory cytokines. Furthermore, in contrast to other cell types, Vdelta1+ T cells do not sustain a growth-promoting or tolerogenic microenvironment. These data make Vdelta1+ T cells an ideal candidate for upcoming immunotherapy trials in Nb.
Some Physical Properties of Eight Refractory Oxides and Carbides (1950)

An investigation of eight hot‐pressed refractory oxides and carbides for possible gas‐turbine application was undertaken. The properties, short‐time tensile strength at elevated temperatures, thermal‐shock resistance, coefficient of linear expansion, and density, were determined. The compositions of the ceramics included beryllium oxide, magnesium oxide, stabilized zirconia, zircon, boron carbide, 85% silicon carbide plus 15% boron carbide, titanium carbide, and zirconium carbide. The short‐time tensile strengths of these ceramics were determined at 1800° and 2200°F. Resistance to thermal shock was determined by rapid cooling in air to room temperature from 1800°, 2000°, 2200°, and 2400°F. The thermal‐expansion characteristics of these materials were studied from room temperature to 1100°F. Zirconium carbide was the strongest material at 2200°F. with a maximum short‐time tensile strength of 15,850 lb. per sq. in.; however, it exhibited extremely poor resistance to oxidation. Boron carbide had a short‐time tensile strength of 22,550 lb. per sq. in. at 1800°F., and was the strongest material at this temperature. Boron carbide also had very poor resistance to oxidation and was among the worst compositions investigated in its ability to resist fracture by thermal shock. The evaluation of strength of boron carbide at 2200°F. was unsuccessful because it fluxed with the grips. Titanium carbide had the best resistance to thermal shock, and had strengths of 15,850 lb. per sq. in. at 1800°F. and 9400 lb. per sq. in. at 2200°F. It was the most promising of the eight compositions investigated. Hot‐pressing of these eight highly refractory bodies indicated that a density of at least 93% of theoretical density could be obtained by this fabrication method.
Radiation Dose Reduction With Chest Computed Tomography Using Adaptive Statistical Iterative Reconstruction Technique (2010)

Adaptive statistical iterative reconstruction helps reduce chest CT radiation dose and improve image quality compared with the conventionally used FBP image reconstruction.
Sunlamp-irradiated phase-transfer catalysis. 1. Cobalt carbonyl catalyzed SRN1 carbonylations of aryl and vinyl halides (1983)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSunlamp-irradiated phase-transfer catalysis. 1. Cobalt carbonyl catalyzed SRN1 carbonylations of aryl and vinyl halidesJean Jacques Brunet, Christian Sidot, and Paul CaubereCite this: J. Org. Chem. 1983, 48, 8, 1166–1171Publication Date (Print):April 1, 1983Publication History Published online1 May 2002Published inissue 1 April 1983https://pubs.acs.org/doi/10.1021/jo00156a004https://doi.org/10.1021/jo00156a004research-articleACS PublicationsRequest reuse permissionsArticle Views1746Altmetric-Citations88LEARN 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
Photodissociation of tetramethyldioxetane (1978)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodissociation of tetramethyldioxetaneKevin K. Smith, Ja-Young Koo, Gary B. Schuster, and Kenneth J. KaufmannCite this: J. Phys. Chem. 1978, 82, 21, 2291–2293Publication Date (Print):October 1, 1978Publication History Published online1 May 2002Published inissue 1 October 1978https://pubs.acs.org/doi/10.1021/j100510a007https://doi.org/10.1021/j100510a007research-articleACS PublicationsRequest reuse permissionsArticle Views38Altmetric-Citations9LEARN 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
Single-channel digital filter design for seismic applications (1994)

Abstract A general least-squares, time-domain filter design methodology has been developed that is easy to use for a variety of seismic filtering applications. The 1-D finite-impulse response frequency filter can efficiently provide the noise attenuation and selectivity needed in modern data processing. Flexibility of design allows a choice of all basic types of single-channel filters commonly used in processing. These include low-pass, high-pass, band-pass, band-reject, and notch filters. In addition, multiple bands may be passed or rejected using a single operator design without increasing the length of the filter. The ability to reject multiple noise bands with one filter is convenient and also reduces data processing costs. The filter can be viewed as a minimum-phase Wiener-Levinson predictive deconvolution filter designed to reject specified frequency bands. The filter is designed from an exact mathematical description of the specified stop bands that provide an explicit expression for the required autocorrelation lags in the normal equations. The filter's desired frequency response (transition zone width and rejection level) is simply related to two input parameters—operator length and white noise level.
Synthesis and Characterization of New MAX Phase Alloys (2014)

The cover image is based on a cross-sectional TEM micrograph of a high current pulsed cathodic arc deposited (Cr 0.8 Mn 0.2 ) 2 AlC thin film (20 nm thickness), revealing its island-like nature.
How Much Practice Is Required to Reduce Performance Variability in a Virtual Reality Mining Simulator? (2019)

Virtual reality allows researchers to explore training scenarios that are not feasible or are potentially risky to recreate in the real world. The aim of this research was to examine whether using a tutorial session prior to using the mining simulator could adequately reduce the performance variability and increase the consistency of participant performance metrics. Eighteen participants were randomly assigned to a tutorial or a non-tutorial group. The tutorial group completed a five-minute tutorial that introduced them to the basics of the machine and virtual reality environment. All participants then completed five sessions in the simulator lasting five minutes each. Personality scores were recorded and participants answered questions to test their situational awareness after each session. Performance metrics such as number of collisions and perception response time were recorded by the simulator. A Wilcoxon signed rank test was used to determine at what point a significant difference in performance metrics was apparent across the five sessions. A mixed effects multilevel regression was done to evaluate the change in variability across time. There were no significant correlations between the personality questionnaire scores and the number of collisions or the perception response time. Both groups demonstrated high standard deviation scores for collisions and perception response time, but the tutorial group had decreasing variability across time. Both groups began to exhibit more consistent scores in the simulator after 10 min of use. Situational awareness questions require some refinement prior to further testing.
Statistical Investigation of Correlations Between Serum Potassium Levels and Electrocardiographic Findings in Patients on Intermittent Hemodialysis Therapy (1970)

Simultaneous determinations of serum potassium and sodium, blood pH, blood pressure, and 12-lead electrocardiograms were obtained in hyperkalemic patients with chronic renal failure. Statistical investigation of the data showed a high correlation between serum potassium levels and ventricular repolarization abnormalities. "Mean intracellular potassium concentration" derived from total body potassium and total body water values was not accurate enough to show significant correlations to ECG changes and did not improve on the already significant correlations with serum potassium levels. Equations are presented which would permit the estimation of serum potassium levels (in a narrow range) from electrocardiographic findings in patients with chronic renal failure and suspected hyperkalemia.
The role of pharmacological enhancement in protease inhibitor-based highly active antiretroviral therapy (2003)

Having changed the landscape in the treatment of HIV infection, the functional efficacy of current protease inhibitors (PIs) remains limited by their pharmacokinetic and pharmacodynamic profiles. Complex metabolism by the cytochrome P450 system (particularly the 3A4 isoenzyme), action of membrane drug transporter elements (such as P-glycoprotein and multi-drug resistance-associated proteins) and activation of the nuclear receptor steroid xenobiotic receptor may alter exposures and compromise the antiretroviral activity of these drugs. These factors, as well as inadequate adherence, can facilitate the emergence of PI resistance and lead to regimen failure. Coadministration of ritonavir can enhance exposures of a primary PI by inhibiting CYP3A4 metabolism, P-glycoprotein activity and multi-drug resistance protein-1-mediated efflux. Adding ritonavir, however, is not without cost. Dyslipidaemia (possibly increasing the risk of cardiovascular events), gastrointestinal intolerance, multiple drug-to-drug interactions and activation of steroid xenobiotic receptor can all result and must be balanced against the pharmacokinetic improvement rendered by the addition of ritonavir. Understanding the pharmacological origins for the variations in exposures of PIs, both between and within patients, is important for the successful use of these agents.