gebhart/patrepeval huggingface dataset:
Does beta adrenergic blockade influence the prognostic implications of post-myocardial infarction exercise testing? (1988)

The influence of beta blockade on the ability of ST depression, during pre-discharge exercise testing, to predict coronary anatomy and subsequent complications was studied in 300 consecutive post-infarct patients, 125 of whom underwent cardiac catheterisation. At the time of exercise 62 patients were taking a beta blocker. The exercise test had a higher sensitivity in predicting multivessel disease in patients who were not taking beta blockers than in patients who were (95% v 76%). beta Blockade did not, however, influence the ability of the test to identify patients at risk of subsequent cardiac events (sensitivity 84% and 85% respectively). These results suggest that it is not necessary to stop treatment with beta blockers before predischarge exercise testing of patients who have had an acute myocardial infarction.
Electrochemical Properties of Helical Carbon Nanomaterials Formed on LiCoO2 by CVD Method (2009)

We used chemical vapor deposition (CVD) to fabricate helical carbon nanomaterials (HCNs) on the surface of LiCoO2 particles and estimated their electrochemical properties. Through SEM measurements, we observed mainly four morphological types of HCNs. It was found that the electrochemical properties of cells with the HCNs were not as good as those of cells with acetylene black (AB).
Multimedia Protection using Content and Embedded Fingerprints (2011)

Improved digital connectivity has made the Internet an important medium for multimedia distribution and consumption in recent years. At the same time, this increased proliferation of multimedia has raised significant challenges in secure multimedia distribution and intellectual property protection. This dissertation examines two complementary aspects of the multimedia protection problem that utilize content fingerprints and embedded collusion-resistant fingerprints. The first aspect considered is the automated identification of multimedia using content fingerprints, which is emerging as an important tool for detecting copyright violations on user generated content websites. A content fingerprint is a compact identifier that captures robust and distinctive properties of multimedia content, which can be used for uniquely identifying the multimedia object. In this dissertation, we describe a modular framework for theoretical modeling and analysis of content fingerprinting techniques. Based on this framework, we analyze the impact of distortions in the features on the corresponding fingerprints and also consider the problem of designing a suitable quantizer for encoding the features in order to improve the identification accuracy. The interaction between the fingerprint designer and a malicious adversary seeking to evade detection is studied under a game-theoretic framework and optimal strategies for both parties are derived. We then focus on analyzing and understanding the matching process at the fingerprint level. Models for fingerprints with different types of correlations are developed and the identification accuracy under each model is examined. Through this analysis we obtain useful guidelines for designing practical systems and also uncover connections to other areas of research. A complementary problem considered in this dissertation concerns tracing the users responsible for unauthorized redistribution of multimedia. Collusion-resistant fingerprints, which are signals that uniquely identify the recipient, are proactively embedded in the multimedia before redistribution and can be used for identifying the malicious users. We study the problem of designing collusion resistant fingerprints for embedding in compressed multimedia. Our study indicates that directly adapting traditional fingerprinting techniques to this new setting of compressed multimedia results in low collusion resistance. To withstand attacks, we propose an anti-collusion dithering technique for embedding fingerprints that significantly improves the collusion resistance compared to traditional fingerprints.
Yacimiento de A Lanzada (Pontevedra) conservación material, equilibrio ambiental y accesibilidad turística (2012)

Comunicación publicada en actas del Congreso por el Grupo Español del I.I.C.(http://hdl.handle.net/10261/49252)
Water‐Soluble Free Radical Addition Polymerizations: Polyacrylamides (2014)

Plastics Engineering is the official publication of the Society of Plastics Engineers (SPE). We provide plastics professionals with a wealth of information about machinery, technological advances, materials innovations, sustainability, and more.
Steam-gasication of biomass in a uidised-bed of olivine particles (2000)

Naturally occurring catalytic substances are employed in biomass steam-gasication processes to enhance the yield of fuel gas and reduce its tar content by cracking and reforming the high molecular weight organic components. Calcined dolomite is widely used for this purpose; it exhibits good catalytic activity under the operating conditions of the gasier. However, due to its poor mechanical strength, it gives rise to a large production of nes in a uidised-bed environment. This work reports an investigation into the catalytic behaviour of olivine, a common, naturally occurring mineral containing magnesium, iron oxides and silica: iron is known to play a positive role in tar decomposition reactions. The gasication runs, performed with a laboratory scale, biomass gasication unit, show that the olivine activity is close to that exhibited by dolomite under comparable operating conditions. Olivine has the additional advantage, however, that its resistance to attrition in the uidised bed is much greater, similar to that of sand. Parametric sensitivity studies of a gasication process, utilising olivine as the uidised-bed inventory, indicate an optimum gasication temperature of just above 800 C, and little inuence of the steam=biomass ratio in the range 0.5{1. c 2000 Elsevier Science Ltd. All rights reserved.
Amide-Glyoxal Reaction Products<sup>1</sup> (1962)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmide-Glyoxal Reaction Products1Sidney L. Vail, Clifford M. Moran, Harry B. Moore, and Russell M. H. KullmanCite this: J. Org. Chem. 1962, 27, 6, 2071–2074Publication Date (Print):June 1, 1962Publication History Published online1 May 2002Published inissue 1 June 1962https://pubs.acs.org/doi/10.1021/jo01053a039https://doi.org/10.1021/jo01053a039research-articleACS PublicationsRequest reuse permissionsArticle Views419Altmetric-Citations16LEARN 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
Scanning Magnetoresistance Microscopy for Imaging Magnetically Labeled DNA Microarrays (2009)

We demonstrate the use of a magnetic tunnel junction (MTJ) sensor as a probe for non-contact scanning microscopy of magnetically labeled DNA microarrays. Induced magnetic stray fields from 2.8 mum diameter magnetic particles are detected using the MTJ sensor, while two dimensional scanning generates the magnetic map of the DNA microarray with a spatial resolution of 1 mum over a large scan area exceeding 1 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Current particle-sensor spacing of ~20 mum results in a detection resolution of ~30 magnetic particles within each 100 mum diameter DNA spot. Our results highlight the use of scanning magnetoresistive microscopy as a convenient and powerful technique for the accurate detection and identification of biomolecules tagged with magnetic particles.
Gas-liquid separation with the rotational particle separator (2003)

Based on known Rotational Particle Separator design principles and fluid flow relations a natural gas - liquid separator is designed. A particular feature of this design is that the filter element is freely mounted in bearings and rotates, without the need of a motor, by introducing swirl in the fluid flowing towards the filter element. The design is particularly suited for operation under high pressures as the rotating filter element is fully contained within a cylindrical pipe. The shaft does not pin through the external wall, so no sealing is required.
Mechanism and kinetics of tetrachlorosilane reactions in an argon-hydrogen microwave plasma (1984)

The dissociation mechanism of silicontetrachloride to silicon by plasma with argon or in mixtures of argon and hydrogen was investigated by sampling the microwave induced plasma and its chemical components by (i) electrostatic double floating probe system (DFPS), (ii) quadrupole mass spectrometry (QMS), and (iii) electron spin resonance (ESR). Plasma diagnostics, i.e., determination of mean electron energy and positive ion density, were performed by DFPS. The reaction rate for chlorosilane fragmentation, polymerization, and silicon formation, in the plasma state were evaluated by QMS sampling of the plasma along the gas flow. ESR was used to investigate the amounts of free radicals adsorbed on solid alumina from different regions of the plasma. Comparing the two plasmas {SiCl4+Ar} to {SiCl4+Ar+H2} it was found that the dissociation of SiCl4 to Si in the argon plasma is mainly controlled by an ion-molecule mechanism while the dissociation in the presence of H2 is mainly controlled by the radical mechanism.
3.1.2 - Development of a 3D capable probing system based on electrical near-field interactions for micro- and nanocoordinate metrology (2016)

With decreasing structure dimensions and rising aspect ratios of the products the demands for microand nano-metrology to measure the components of microsystems and components with microstructure have increased. Therefore nanometre resolving 3D capable probing sensors and corresponding 3D positioning systems are required. At the Friedrich-Alexander-Universitt Erlangen-Nrnberg a mechanical contact-free, sub-nanometre-resolving 3D micro probing system based on electrical near-field interactions has been developed and investigated. This system is as a probing system integrated in the nanopositioning and nanomeasuring machine NMM-1. To improve the measuring dynamics and expand the application possibilities the probing system has been extended with a 3D movable piezoelectric nanoscanner to directly detect its probing direction from the measurement signals.
Performance Analysis of TCP NewReno over a Cellular Last-Mile: Buffer and Channel Losses (2014)

TCP NewReno is one of the most widely deployed TCP versions in today's Internet. However, a full understanding of the complex inter-dependencies between the losses due to wireless channel errors and those due to buffer overflows, and their (joint) impact on TCP NewReno's congestion control algorithm in wireless and wired-cum-wireless networks is still lacking. In this paper, we develop a comprehensive analytical model for, and study the performance of, TCP NewReno with a cellular last-mile access, taking into account both types of losses. We assume a frame-level Markovian loss model, and build a model that features the system's basic controllable parameters (such as the number of retransmissions and the buffer size), so as to study how they (jointly) affect the TCP-level throughput. We model certain finer aspects, e.g., correlations in wireless and buffer losses and their cross-correlation. We provide a summary of numerical results highlighting several non-trivial findings. In particular, we demonstrate that there exist optimal (i.e., TCP throughput maximizing) pairs of the number of retransmissions and the buffer size.
A GPU‐accelerated Monte Carlo dose calculation platform and its application toward validating an MRI‐guided radiation therapy beam model (2016)

A Monte Carlo simulation platform was developed based on a GPU- accelerated version of penelope. This platform was used to validate that both the vendor-provided head model and fast Monte Carlo engine used by the MRIdian system are accurate in modeling radiation transport in a patient using 2%/2 mm gamma criteria. Future applications of this platform will include dose validation and accumulation, IMRT optimization, and dosimetry system modeling for next generation MR-IGRT systems.
Reactions of the melatonin metabolite <i>N</i><sup>1</sup>‐acetyl‐5‐methoxykynuramine with carbamoyl phosphate and related compounds (2009)

N-[2-(6-methoxyquinazolin-4-yl)-ethyl] acetamide (MQA) is a compound formed from the melatonin metabolite N(1)-acetyl-5-methoxykynuramine (AMK). We followed MQA production in reaction systems containing various putative reaction partners, in the absence and presence of hydrogen peroxide and/or copper(II). Although MQA may be formally described as a condensation product of either N(1)-acetyl-N(2)-formyl-5-methoxykynuramine (AFMK) with ammonia, or AMK with formamide, none of these combinations led to substantial quantities of MQA. However, MQA formation was observed in mixtures containing AMK, hydrogen peroxide, hydrogen carbonate and ammonia, or AMK, hydrogen peroxide, copper(II) and potentially carbamoylating agents, such as potassium cyanate or, more efficiently, carbamoyl phosphate. In the presence of hydrogen peroxide, copper(II) and carbamoyl phosphate, MQA was the major product obtained from AMK, but the omission of copper(II) mainly led to another metabolite, 3-acetamidomethyl-6-methoxycinnolinone (AMMC). This was caused by nitric oxide (NO) generated under oxidative conditions from carbamoyl phosphate, as shown by an NO spin trap. MQA formation with carbamoyl phosphate was not due to the possible decomposition product, formamide. The reaction of AMK with carbamoyl phosphate under oxidative conditions, in which inorganic phosphate and water are released and which differs from the typical process of carbamoylation via isocyanate, may be considered as a new physiological route of MQA formation.
THE STRUCTURE OF CARBOXYPEPTIDASE A, VI. SOME RESULTS AT 2.0-Å RESOLUTION, AND THE COMPLEX WITH GLYCYL-TYROSINE AT 2.8-Å RESOLUTION (1967)

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Exact error probability analysis of orthogonal space-time block codes over correlated Rician fading channels (2005)

Exact expressions for the symbol error probability at the output of the maximum likelihood (ML) decoder are obtained for multiple-input multiple-output (MIMO) systems coded by orthogonal space-time block codes (OSTBCs) over correlated fading channels. Such expressions are derived for the general case of arbitrary input signal constellations and OSTBC, as well as arbitrary correlations of Rayleigh-Rician fading channel coefficients
Observation of temperature dependent thicknesses in ultrathin polystyrene films on silicon (1993)

The temperature dependent thicknesses of ultrathin polystyrene films under vacuum on Si (111) substrates were investigated via x-ray reflectivity in situ. The contraction of ultrathin polymer films was directly observed for the first time to the author's knowledge. The degree of contraction depends on the initial thickness of the ultrathin polystyrene film, with the magnitude of contraction increasing with decreasing initial film thickness. This contraction ranged from 0--17 % and occurred at temperatures well below the reported bulk polystyrene glass transition temperature.
New smart readout technique performing edge detection designed to control vision sensors dataflow (2012)

In this paper, a new readout strategy for CMOS image sensors is presented. It aims to overcome the excessive output dataflow bottleneck; this challenge is becoming more and more crucial along with the technology miniaturization. This strategy is based on the spatial redundancies suppression. It leads the sensor to perform edge detection and eventually provide binary image. One of the main advantages of this readout technique compared to other techniques, existing in the literature, is that it does not affect the in-pixel circuitry. This means that all the analogue processing circuitry is implemented outside the pixel, which keeps the pixel area and Fill Factor unchanged. The main analogue block used in this technique is an event detector developed and designed in the CMOS 0.35μm technology from Austria Micro Systems. The simulation results of this block as well as the simulation results of a test bench composed of several pixels and column amplifiers using this readout mode show the capability of this readout mode to reduce dataflow by controlling the ADCs. We must mention that this readout strategy is applicable on sensors that use a linear operating pixel element as well as for those based on logarithmic operating pixels. This readout technique is emulated by a MATLAB model which gives an idea about the expected functionalities and dataflow reduction rates (DRR). Emulation results are shown lately by giving the pre and post processed images as well as the DRR. This last cited does not have a fix value since it depends on the spatial frequency of the filmed scenes and the chosen threshold value.
Upper stage rocket guidance and control using discontinuous reaction control thrusters via sliding modes (1997)

In spring 1995 a very significant academic project took place at the University of Alabama in Huntsville. This integrated project supported by NASA Marshal Flight Center and major aerospace, companies aimed at designing the MSLS upper stage, based on an hybrid rocket design. This project included the design of the avionics system, and of the guidance and control subsystem (G&C). This paper presents the architecture of the G&C, and the design of corresponding algorithms. Given the discontinuous nature of the attitude thrusters used in the reaction control system, the proposed design is based on the output tracking sliding mode technique. The proposed implementation of the design replaces the traditional high frequency relay switching by a so called smoothing sliding mode controller. It uses a saturation law, where the amplitude of the control modulates the duration of thruster's pulses.
Global trade liberalization and forest product trade patterns. (2002)

This study assesses the impacts of NAFTA and GATT/WTO on the global trade flows of forestry, lumber, and pulp and paper products using a computable general equilibrium model. Tabulated results are presented and discussed. The results provides both intrasectoral and intersectoral impacts of the tariff reductions under these trade agreements. The current trade tariffs for forest products vary across products and regions/countries. In general, the tariffs among developed countries or treaty countries are relatively low, and those among developing countries and between developed countries and developing countries are relatively high.
Using network dynamic fMRI for detection of epileptogenic foci (2015)

Our current results suggest that data driven functional MRI methods that target network dynamics hold promise in providing clinically valuable tools for identification of epileptic regions.
A large number of protein expression changes occur early in life and precede phenotype onset in different animal models for Huntington's disease (2009)

Huntington's disease (HD) is fatal in humans within 15 to 20 years of symptomatic disease. Although late stage HD has been studied extensively, protein expression changes that occur at the early stages of disease and during disease progression have not been reported. In this study, we used a large 2‐D gel/mass spectrometry based proteomics approach to investigate HD‐induced protein expression alterations and their kinetics at very early stages and during the course of disease. Different HD animal models were investigated at absence, early, intermediate and late stage HD. Preliminary results showed that in at least two animal models HD‐stage‐specific protein changes (above 70%) as well as a drastic alteration in protein expression already occurred before symptoms appeared. Early changes included in both cases the dys‐regulation of proteins involved in glycolysis/gluconeogenesis and the actin‐cytoskeleton formation. This suggests a period of highly variable protein expression which precedes the onset of an HD phenotype. More animal models will be investigated to further characterize protein alteration kinetics and their role in HD. Our observations suggest that HD is characterized by a highly dynamic disease pathology not represented by linear protein concentration alterations over the course of disease.
Baseline and postfusion opioid burden for patients with low back pain. (2018)

The opioid burden in the LBP population is high and is further elevated in those who subsequently undergo fusion surgery. Long-term opioid prescriptions persisted in 27% of fusion patients 12 months post surgery. Efforts to identify efficacious alternative therapies to treat LBP may reduce the societal burden of chronic opioid use.
High-Performance and Area-Efficient Reduction Circuits on FPGAs (2006)

Field-programmable gate arrays (FPGAs) have become an attractive option for scientific applications. However, due to the pipelining in the FPGA-based floating-point units, data hazards may occur during reduction of series of values. A typical example of reduction is the accumulation of sets of floating-point values, which is needed in many scientific operations such as dot product and matrix-vector multiplication. Reduction circuits can significantly impact the overall performance, impose unrealistic buffer requirements, or occupy large area on the FPGA. In this paper, we introduce a high-performance and area-efficient FPGA-based reduction circuit. It can reduce multiple sets of sequentially delivered floating-point values without stalling the pipeline. In contrast with previous works, the proposed circuit uses one floating-point adder, and can handle input sets of arbitrary size. The buffer size needed by the circuit is independent of the size of the individual sets and the number of input sets. Using a Xilinx Virtex-II Pro FPGA as the target device, we implement the proposed reduction circuit and present performance and area results.
An electromagnetic drift instability in the magnetic reconnection experiment and its importance for magnetic reconnection (2005)

The role which resistivity plays in breaking magnetic field lines, heating the plasma, and plasma-field slippage during magnetic reconnection is discussed. Magnetic fluctuations are observed in the MRX (magnetic reconnection experiment) [M. Yamada, H. Ji, S. Hsu, T. Carter, R. Kulsrud, N. Bertz, F. Jobes, Y. Ono, and F. Perkins, Phys. Plasmas 4, 1936 (1997)] that are believed to provide resistive friction or wave resistivity. A localized linear theory has been proposed for their origin as an obliquely propagating lower hybrid drift instability. In this paper, the linear theory of the instability is summarized, and the resulting heating and slippage are calculated from quasilinear theory. Making use of measured amplitudes of the magnetic fluctuations in the MRX, the amount of these effects is estimated. Within the experimental uncertainties they are shown to be quite important for the magnetic reconnection process.