gebhart/patrepeval huggingface dataset:
Reservoir Simulation of H2S Production During a SAGD Process Using a New Sulfur-Based-Compositional Kinetic Model (2015)

Abstract Nowadays steam injection is commonly used as a thermal EOR method due to its efficiency for recovering hydrocarbons from heavy oils and bitumen. Reservoir models simulating this process describe the thermal effect of the steam injection, but generally neglect the chemical reactions induced by the steam injection. These reactions are called aquathermolysis and have been previously investigated through laboratory experiments. Based on these experimental results, this paper proposes a new compositional kinetic model to reproduce these reactions in the context of reservoir modeling. In particular the proposed reactions model accounts for the formation of the highly toxic and corrosive acid gas H2S in the presence of sulfur-rich heavy oil and predicts the modification of the oil SARA composition versus time that results from the aquathermolysis reactions. The overall objective of this paper is to understand the aquathermolysis reactions in reservoir undergoing steam injections and to provide the Oil companies with a numerical model for reservoir simulators that forecasts H2S production risks. The new Sulfur-Based-Compositional Kinetic Model is firstly presented and then validated in the context of laboratory-scale experiments. Its H2S and SARA composition predictions are based on a new simplified reactive scheme of 5 reactions coupled to a compositional and thermal reservoir simulation with no mass transfer (0D). Finally the thermo-kinetic modeling is coupled with a 2D reservoir simulation of a SAGD process for a generic Athabasca oil sand. The H2S to SARA (bitumen) production ratio against time computed by the reservoir simulation is found to be consistent with data from a SAGD process in Athabasca, which validates the modeling approach followed.
Blue-green laser diodes made from II-VI semiconductors (1991)

Laser diodes fabricated from II-VI semiconductors are discussed. These devices emit coherent light at a wavelength of 490 nm from a ZnSe-based single-quantum-well structure under pulsed current injection at 77 K. The device structure consists of a Cd/sub 0.2/Zn/sub 0.8/Se single quantum well in a ZnSe-ZnS/sub 0.07/Se/sub 0.93/ waveguide, grown by MBE on a
Source counting in real-time sound source localization using a circular microphone array (2012)

Recently, we proposed an approach inspired by Sparse Component Analysis for real-time localization of multiple sound sources using a circular microphone array. The method was based on identifying time-frequency zones where only one source is active, reducing the problem to single-source localization for these zones. A histogram of estimated Directions of Arrival (DOAs) was formed and then processed to obtain improved DOA estimates, assuming that the number of sources was known. In this paper, we extend our previous work by proposing three different methods for counting the number of sources by looking for prominent peaks in the derived histogram based on: (a) performing a peak search, (b) processing an LPC-smoothed version of the histogram, (c) employing a matching pursuit-based approach. The third approach is shown to perform very accurately in simulated reverberant conditions and additive noise, and its computational requirements are very small.
Atovaquone and Proguanil Hydrochloride for Treatment of Malaria (1999)

Atovaquone and proguanil hydrochloride is a safe and effective combination for treatment of malaria.
Proposition of a Solution for the Setting of the Abrasive Waterjet Cutting Technology (2013)

Abstract The submitted paper aims to clarify the abrasive waterjet technology, particularly from the point of view of produced surface topography. It provides a new insight into the deformation process caused by the effect of abrasive waterjet and into the possibilities of using the surface topography for solving the issues of optimization of the process. The subject of study is a system of cutting tool, material and final surface topography and optimization of their parameters. The cutting or disintegrating tool of abrasive waterjet technology is flexible. The trajectory of its cut traces is strictly determined here by disintegration resistance at critical moments of tool-material interaction. The physico-mechanical character of the interaction within the cut will manifest itself in the final surface condition. This process can be re-analysed by measuring the selected elements of topography and roughness on the final surface, namely depending on the depth of the cut, technological parameters of the tool and mechanical parameters of the material. The mentioned principle is the basis of the presented solution. It lies in the analytical processing and description of correlation interrelations between set technological and measured topographical quantities in relation to the depth of cut and the type of material.
Structure-activity studies of 20-deoxo-20-amino derivatives of tylosin-related macrolides. (1989)

Reductive amination of the C-20 aldehyde group of tylosin and related macrolides yielded a large series of derivatives with potentially useful antibiotic properties. Evaluation of these new compounds was conducted on the basis of: 1) Broad antimicrobial spectrum in vitro, with particular emphasis on inhibition of Pasteurella multocida and Pasteurella haemolytica; 2) in vivo efficacy, especially when given orally, against P. multocida in experimental infections in chicks; and 3) bioavailability after oral administration to laboratory animals. The most useful activity was found within a series of derivatives produced by reductive amination of desmycosin with secondary amines.
Looper H-infinity control for hot strip mills (2002)

The H-infinity control theory has been applied to some engineering fields including the steel making process. The H-infinity control theory makes it possible to apply multivariable control with frequency domain design method and to get robust stable control systems. The author developed a looper H-infinity multivariable control system for hot strip finishing mills, and have obtained better results than conventional control methods. The looper control is one of the most important control methods in hot strip mills. The loopers are placed between each rolling stand, and control the interstand strip tension. It is very important to control stably both looper and strip tension at each of their target values. Especially, the authors intended to reduce strip tension fluctuation than looper angle fluctuation, because strip tension severely affects thickness and width gage. This paper presents the design method of the looper H-infinity control system. Also showing some actual control data, they compare the performance of conventional PI control, noninteractive control, and H-infinity control.
Prenatal testing for late infantile neuronal ceroid lipofuscinosis (2000)

Classic late infantile neuronal ceroid lipofuscinosis (LINCL) is a neurodegenerative disease in which autofluorescent "curvilinear" storage bodies accumulate in tissues from affected patients. Recently, the LINCL gene (CLN2) has been found to code for a pepstatin-insensitive lysosomal protease whose activity is deficient in LINCL specimens. We report the first 2 cases of successful prenatal testing for LINCL by using DNA and enzyme-based methods on amniocytes, and describe a new private mutation in one of the families analyzed. These approaches allow definitive prenatal diagnosis and represent a significant improvement over previous pathological methods.
Design Study of an Optical System for Panoramic Imagery. (1976)

In meeting requirements for ever larger field angles in training devices, such as for helicopter pilots, tank drivers, etc., a design study of a lens system for panoramic imagery was made. Two designs have been brought to the point where their manufacture can commence: Design A with 50mm image diameter, F/5, elevation angles of +60 and -30 deg; Design B with 95mm image diameter, F/10, and elevation angles of +28 and -15 deg. The optical system consists of two (protected) confocal hyperboloidal mirrors acting as a reversed Gallilean telescope, followed by a refractive system. The system can be used as a camera and as projection lens; it has been designed to withstand the heat of a high power arc lamp. Resolution is about 40 lines/mm, but there is room for further improvements.
Interaction of a bistable injection laser with an external optical cavity (1982)

Experimental results on interactions of a bistable laser with an external optical cavity are presented. Switching of a bistable injection laser can be done by varying the amount of optical feedback. The optical switching is accompanied by a switching of the voltage across the absorber section. This can be utilized in digital optical disk readout. A bistable laser with an antireflection coating on one facet is more suitable for this task. No pulsations can be observed in a bistable laser with optical feedback if the absorber section is biased with a constant current source; but when it is biased with a voltage source, pulsation occurs at the external cavity round trip frequency. This indicates that even though the intrinsic absorption of the semiconductor material does not saturate easier than the gain, the presence of such absorptions in GaAs lasers can still produce pulsations when the electrical aspect is taken into account.
Optical switch failure protection in mesh networks with arbitrary non-planar architectures (2003)

This paper presents a general methodology for protecting a network with an arbitrary non-planar architecture from a network switch failure. The protection procedure involves identifying a family of cycles with special characteristics, called protection cycles, and grouping and interconnecting these cycles in a way that ensures failure restoration for at least one of the active connections passing through the failed network switch. The protection process proposed is fast, distributed and autonomous and does not rely on a central manager or a centralized database.
Heterogeneous Relational Kernel Learning (2019)

Recent work has developed Bayesian methods for the automatic statistical analysis and description of single time series as well as of homogeneous sets of time series data. We extend prior work to create an interpretable kernel embedding for heterogeneous time series. Our method adds practically no computational cost compared to prior results by leveraging previously discarded intermediate results. We show the practical utility of our method by leveraging the learned embeddings for clustering, pattern discovery, and anomaly detection. These applications are beyond the ability of prior relational kernel learning approaches.
Facilitating hydroxide transport in anion exchange membranes via hydrophilic grafts (2014)

Alkaline exchange membranes (AEMs) are a promising class of polyelectrolytes whose alkaline operating environment enables the use of non-precious metal catalysts in low-temperature fuel cells. However, their poor ionic conductivities, which are often an order of magnitude lower than traditional acidic membranes (e.g., Nafion), have limited their practicality. The performance problem can partially be ascribed to the poorly-defined morphologies of typical random copolymer AEMs, leading to tortuous ion transport pathways. Here, we show the ability to form nanoscale (5 to 10 nm diameter) anion transport channels by grafting hydrophilic poly(ethylene glycol) side-chains along a model benzyltrimethylammonium polysulfone-based AEM. Concomitant with the structure formation is a 100% increase in the IEC-normalized hydroxide conductivity from 20.2 mS g cm−1 mmol−1 to 40.3 mS g cm−1 mmol−1 as well as a 50% increase in the peak power density from 118 mW cm−2 to 180 mW cm−2 when incorporated into a fuel cell.
Comparative analysis of distributed mass micromachined gyroscopes fabricated in SCS-SOI and EFAB (2006)

This paper studies a design approach that yields robust vibratory MEMS gyroscopes. The design is based on multiple drive-mode resonators with incrementally spaced frequencies, distributed symmetrically around the center of a supporting frame. These resonators are structurally constrained in the tangential direction with respect to the supporting frame. In the presence of an angular rotation rate about the z-axis, a harmonic Coriolis force is induced on each proof mass. These force vectors lie in the tangential direction, generating a resultant torque on the supporting frame. The net Coriolis torque excites the supporting frame into torsional oscillation about the z-axis, which is capacitively detected to generate angular rate measurement. Two batches of prototypes have been fabricated using in-house single crystal silicon on insulator (SCS-SOI) bulk-micromachining and EFAB<sup>TM</sup> process commercially available from Microfabrica. Wideband drive operation was demonstrated in SOI devices. EFAB process yielded 850 Hz devices with quality factor 250 in air (bandwidth 3 Hz) and 850 in vacuum. Increase of temperature from 25<sup>o</sup> to 125<sup>o</sup>C shifts the resonant frequency down by roughly bandwidth, while quality factor drops by 8%. Parasitics model associated with EFAB consists of only a lumped capacitor and is simpler than two-parametric parasitics circuit in SOI devices. Nonlinear parametric excitation of motion at resonant frequency by super-harmonic AC voltage was experimentally characterized. This actuation method provides high amplitude of motion and separates motion from parasitics in frequency domain. The actuation method can potentially further improve the bandwidth and gain characteristics of distributed mass gyroscope.
Master Transduction Curve for Field-Structured Chemiresistor Calibration (2010)

Chemiresistors are gas sensors for volatile organic compounds that are composed of conducting particle networks in a polymer matrix. In the presence of an analyte that is compatible with the polymer phase, the sensor conductance decreases as the analyte is absorbed, eventually reaching a steady-state value that is a measure of the analyte's concentration. The response curve, which is the relationship between steady-state conductance and analyte activity (normalized concentration), is strongly dependent on both the chemical affinity of the analyte for the polymer and the stress field within the chemiresistor composite. Calibration of an individual sensor would seem to necessitate mapping out the response curve for each analyte of interest, a tedious and expensive proposition. In a recent paper, we have shown that the transduction curve of any particular sensor is a function of polymer swelling alone, regardless of the chemical nature of the analyte. This master transduction curve implies that sensor calibration requires only a knowledge of the polymer mass-sorption isotherm for any set of analytes of interest, data that can be collected once and for all. Any single analyte can then be used to calibrate the response of a particular sensor as a function of analyte activity, and the response to other analytes can be predicted. As a corollary, a calibrated sensor can be used to determine the mass-sorption data for any other analyte of interest. In this paper, we provide a detailed description of the construction of the master transduction curve, show how this curve can be used to measure polymer sorption with a calibrated chemiresistor, and demonstrate the use of a single analyte to calibrate sensors of disparate sensitivities and predict their response to two other analytes.
Characterization of a Highly Attenuated Japanese Encephalitis Virus Generated from Molecularly Cloned cDNA (1995)

Six recombinant Japanese encephalitis virus (JEV) isolates were recovered from infectious RNAs transcribed by T7 RNA polymerase from molecularly cloned cDNA templates. Three of the recombinant viruses had characteristics similar to the wild-type parent virus, JaOArS982. The other 3 recombinant viruses exhibited an attenuated phenotype in mice. An avirulent recombinant virus, IC47, was characterized and compared with the wild-type parent virus and a virulent recombinant virus, IC37. IC47 produced smaller plaques than parent or IC37 viruses and exhibited no viremia or neuroinvasion in young adult mice inoculated subcutaneously and no mortality when inoculated intracerebrally. IC47 was also immunogenic and protective in the murine model. The probable basis for attenuation, revealed by nucleotide sequence analysis, was a single amino acid substitution at position 138 (Glu to Lys) in the E protein.
Low-latency VLSI architecture for neural cross-frequency coupling analysis (2017)

Growing evidence suggests that cross-frequency coupling (CFC) is a key mechanism in neuronal computation, communication, and learning in the brain. Abnormal CFC has been implicated in pathological brain states such as epilepsy and Parkinson's disease. A reduction in excessive coupling has been shown in effective neuromodulation treatments, suggesting that CFC may be a useful feedback measure in closed-loop neural stimulation devices. However, processing latency limits the responsiveness of such systems. A VLSI architecture is presented which implements three selectable measures of CFC to enable the application specific trade-off between low-latency and high-accuracy processing. The architecture is demonstrated using in-vitro human neocortical slice recordings, with a latency of 48ms.
Characterization of Nanoaerosol Size Change During Enhanced Condensational Growth (2010)

Increasing the size of nanoaerosols may be beneficial in a number of applications including filtration, particle size selection, and targeted respiratory drug delivery. A potential method to increase particle or droplet size is enhanced condensational growth (ECG), which involves combining the aerosol with saturated or supersaturated air. In this study, we characterize the ECG process in a model tubular geometry as a function of initial aerosol size (mean diameters - 150, 560 and 900 nm) and relative humidity conditions using both in vitro experiments and numerical modeling. Relative humidities (99.8 - 104%) and temperatures (25 - 39 °C) were evaluated that can safely be applied to either targeted respiratory drug delivery or personal aerosol filtration systems. For inlet saturated air temperatures above ambient conditions (30 and 39 °C), the initial nanoaerosols grew to a size range of 1000 - 3000 nm (1 - 3 μm) over a time period of 0.2 seconds. The numerical model results were generally consistent with the experimental findings and predicted final to initial diameter ratios of up to 8 after 0.2 s of humidity exposure and 14 at 1 s. Based on these observations, a respiratory drug delivery approach is suggested in which nanoaerosols in the size range of 500 nm are delivered in conjunction with a saturated or supersaturated air stream. The initial nanoaerosol size will ensure minimal deposition and loss in the mouth-throat region while condensational growth in the respiratory tract can be used to ensure maximal lung retention and to potentially target the site of deposition.
Self-optimizing control of cooling tower for efficient operation of chilled water systems. (2012)

The chilled-water systems, mainly consisting of electric chillers and cooling towers, are crucial for the ventilating and air conditioning systems in commercial buildings. Energy efficient operation of such systems is thus important for the energy saving of commercial buildings. This paper presents an extremum seeking control (ESC) scheme for energy efficient operation of the chilled-water system, and presents a Modelica based dynamic simulation model for demonstrating the effectiveness of the proposed control strategy. The simulated plant consists of a water-cooled screw chiller and a mechanical-draft counter-flow wet cooling tower. The ESC scheme takes the total power consumption of the chiller compressor and the tower fan as feedback, and uses the fan speed setting as the control input. The inner-loop controllers for the chiller operation include two proportional-integral (PI) control loops for regulating the evaporator superheat and the chilled water temperature. Simulation was conducted on the dynamic simulation model of the whole plant including the screw chiller and the cooling tower for different scenarios. The simulation results demonstrated the effectiveness of the proposed ESC strategy in searching for the optimal tower fan speed set-point under tested circumstances, and the potential for energy saving is also evaluated.
ENDOCRINE STRATEGIES FOR INSECT CONTROL (1982)

Analogs of juvenile hormone III have been successfully applied to the control of several adult insect pests. Since these hormones are ineffective for the control of immature insects which are most important in agriculture through their feeding damage to crops, we searched for and discovered hormone antagonists as natural constituents of plants in the genus Ageratum. These anti‐hormones (Precocenes) induce lethal precocious metamorphosis in immature stages and sterilize adult insects. Mode of action and metabolism studies have revealed that the precocenes undergo a lethal activation within the endocrine gland which secretes juvenile hormone, resulting in destruction of the gland. RÉSUMÉ Stratégies endocrines pour la lutte contre les insectes Puisque les hormones des insectes contrôlent leurs métamorphose, reproduction, diapause et comportement, une technique agissant sur la biosynthese, la sécrétion ou l'action des hormones devrait fournir une excellente méthode de lutte contre les insectes. La découverte. l'isolement et l'identification des hormones juvéniles des insectes ont provoqué très tôt un intérèt commercial, et des efforts pour optimaliser les synthèses suivirent la mise au point d'analogues d'hormones supérieurs qui trouvèrent leurs applications dans la lutte contre les insectes d'importance économique au stade imaginal. Des analogues d'hormones sont maintenant utilisés dans la lutte contre les moustiques, les mouches du fumier, les moucherons de champignons et certains insectes de serre. Puisque la plupart des dégâts en agriculture sont dus à la voracité des stades larvaires (non affectés par un excès d'hormone juvénile) nous avons conscience que de nouvelles stratégies seraient nécessaires. Convaincus des limites des hormones juvéniles dans la protection des cultures, nous avons recherché des méthodes pour contrecarrer l'hormone juvénile et nous avons été récompensés par la découverte de deux composés végétaux qui possèdent une activité antagoniste de l'hormone juvénile. Ils induisent une métamorphose précoce létale et stérilisent les adultes. Par les recherches sur les relations entre leur structure et leur activé biologique, et les études métaboliques et histologiques, il est maintenant clair que les précocènes sont activés par oxydation en epoxydes réactifs qui alcalisent des éléments cellulaires importants, produisant une condensation destructrice des cellules dans les corpora allata et éventuellement une destruction complète de la glande endocrine. Bien qu'il ne soit pas évident que les précocènes naturels deviendront importants dans la lutte contre les insectes, ils fournissent la preuve de stratégies défensives subtiles des plantes et servent d'exemples des possibilités d'obtenir une protection contre les insectes par une altération des processus induits par le système endocrine.