gebhart/patrepeval huggingface dataset:
Caractérisation dynamique et thermique de la convection naturelle turbulente dans une cavité différentiellement chauffée comportant un linteau. (2007)

On présente une étude expérimentale ayant pour but de caractériser l'écoulement d'air dans une cavité de section droite verticale de 1 m X 1 m et de 0,32 m de profondeur. Deux parois verticales en vis-à-vis sont différentiellement chauffées et l'écart de température est fixé à 15° C, pour atteindre un régime d'écoulement de convection naturelle faiblement turbulente, caractérisé par une valeur du nombre de Rayleigh de l'ordre de 1,5.10 puissance 9. Une opération (un linteau) de 30 cm de hauteur, fait d'un matériau thermiquement isolant est positionnée au centre du plafond de cette cavité. Des cartographies de température d'air, réalisées à l'aide de deux micro-thermocouples, ainsi que des mesures des composantes horizontale et verticale de la vitesse, effectuées par LDV, permettent d'obtenir des champs thermique et dynamique dans le plan vertical médian. Ces mesures sont comparées aux résultats correspondants, obtenus dans une cavité non partitionnée afin de caractériser l'influence du linteau.
Interface Traps in Silicon Carbide MOSFETs (2008)

In classical MOS technology, reliability and performance limiting defects are, as a rule, precisely at the semiconductor/insulator and very near that on the dielectric side. In the Si/SiO2 system, the dominating defects have typically been silicon dangling bond defects. During the last few years there has been a great deal of interest in materials based MOS technologies. In these new devices, the physical location and chemical nature of performance limiting defects may be very different from the Si/SiO2 case. In this study we show that interface traps in 4H SiC MOSFETs may be very strongly influenced by the quality of the SiC substrate, with defects in that substrate present at densities which can be comparable to or in excess of the defect densities precisely at the semiconductor/ dielectric interface. Using DCIV and magnetic resonance measurements, we explore the physical location and chemical nature of these performance limiting defects in variously processed SiC MOSFETs.
Genotypic characterization of Acanthamoeba spp. causing ocular infections in Swedish patients: Identification of the T15 genotype in a case of protracted keratitis (2010)

The genus Acanthamoeba represents free-living amoebae typically widespread in soil and water. It consists of more than 20 known species representing 15 genotypes of different pathogenicity and virulence. The aim of the study was the genotypic characterization of Acanthamoeba spp. isolated from human keratitis cases in Sweden. Thirteen amoeba isolates obtained from contact lens users with suspected Acanthamoeba keratitis (AK) were subjected to polymerase chain reaction amplification and subsequent sequencing of the SSU rRNA gene fragment. Sequence analysis identified 4 different genotypes in the studied material. The majority of samples (92%) represented sequences of T3, T4 and T11, all belonging to a cluster of related genotypes frequently described in AK cases. Similar to other reports, genotype T4 was the most common finding in our material (77% of samples). Interestingly, an uncommon genotype, T15, mostly reported from environmental sources, was found in a sample from a patient suffering from a protracted keratitis.
Object detection using straight line matching in θ‐ρ space (2010)

Abstract The contours of many industrial parts contain straight lines and the positions of the lines are therefore useful information for object detection. This paper presents a matching technique for straight lines. The method consists of θ‐matching, ρ‐matching, and pose estimation. Any lines in 2D space are represented with parameters θ and ρ by the Hough transform. In order to find the corresponding lines in a model and a scene, the θ and ρ values are evaluated in θ‐matching and ρ‐matching. When an object is translated and rotated, the contour lines of the object are also transferred and the θ values of the lines are merely shifted by the rotation angle in the θ‐ρ space. Thus, the relative positions of the θ values are invariant. In θ‐matching, the corresponding lines of the model and the scene are selected so that the relative θ values of the corresponding lines are nearly equal. In ρ‐matching, the corresponding lines are evaluated further by computing the deviations of their ρ values. Finally, the transfer parameters of the selected pairs are estimated in pose estimation. The experiments show that this technique is robust to rotation, occlusion, and scaling of the objects. We also discuss the computation time, in which the preprocess such as edge detection and the Hough transform takes much of the time. © 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 93(3): 34–41, 2010; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecj.10176
Perceptual and response interference in children with attention‐deficit hyperactivity disorder, and the effects of methylphenidate (1999)

Fourteen children with attention-deficit hyperactivity disorder (ADHD) and 14 normal control children were compared with respect to stimulus- and response-related processes. Subjects with ADHD took part in two additional sessions under methylphenidate or placebo. In both experiments, performance and electrophysiological measures such as the P2, N2, and P3 components of event-related potential and electromyogram (EMG) activity were measured during an Eriksen flanker task. In both groups of children, reaction times (RTs) to arrow stimuli incongruent with the target were longer than those to neutral stimuli (response interference), which were again slower than RTs to target-alone stimuli (perceptual interference). Children with ADHD made more errors to incongruent stimuli and showed more response interference. For correct responses, no differences between the groups in response interference effects on reaction time, P2, N2, and P3 latency, or EMG onset were found. Methylphenidate had a general enhancing effect on accuracy but did not specifically reduce interference from the flanking stimuli. Methylphenidate had no effects on RT, N2 and P2 latency, P3 amplitude or latency, or EMG activity. The conclusion that methylphenidate did not influence response processes contrasts sharply with findings reported by authors using the Sternberg memory search task.
Comments on "The coverage-capacity tradeoff in cellular CDMA systems (2002)

For original paper see Veeravalli, V.V. and Sendonaris, A., ibid., vol.48, p.1443-50 (1999). We make some remarks concerning the coverage-capacity analysis in the above mentioned paper, in particular regarding the approximate statistical characterization of the received powers, and suggest how its accuracy could be increased.
Generation of multicolour Kerr solitons by cascaded Raman scattering (2008)

International audience
ChemInform Abstract: SYNTHESIS OF AMINES THROUGH NUCLEOPHILIC ADDITION ON NITROGEN (1985)

Abstract Das leicht zugängliche Tetraphenylcyclopentadienon (I) wird über das Oxim (II) in das Oximtosylat (III) übergeführt, das mit den Arylmagnesiumbromiden (Via) oder den Lithiumfuranen (IVb) mit hohen Ausb. zu den Aryliminen (V) reagiert.
Light-activated RNA interference using double-stranded siRNA precursors modified using a remarkable regiospecificity of diazo-based photolabile groups (2009)

Diazo-based precursors of photolabile groups have been used extensively for modifying nucleic acids, with the intention of toggling biological processes with light. These processes include transcription, translation and RNA interference. In these cases, the photolabile groups have been typically depicted as modifying the phosphate backbone of RNA and DNA. In this work we find that these diazo-based reagents in fact react very poorly with backbone phosphates. Instead, they show a remarkable specificity for terminal phosphates and very modest modification of the nucleobases. Furthermore, the photo deprotection of these terminal modifications is shown to be much more facile than nucleobase modified sites. In this study we have characterized this regiospecificity using RNA duplexes and model nucleotides, analyzed using LC/MS/MS. We have also applied this understanding of the regio-specificity to our technique of light activated RNA interference (LARI). We examined 27-mer double-stranded precursors of siRNA ('dsRNA'), and have modified them using the photo-cleavable di-methoxy nitro phenyl ethyl group (DMNPE) group. By incorporating terminal phosphates in the dsRNA, we are able to guide DMNPE to react at these terminal locations. These modified dsRNA duplexes show superior performance to our previously described DMNPE-modified siRNA, with the range of expression that can be toggled by light increasing by a factor of two.
Printed backfire wideband circularly polarised tapered gap loop antenna (2002)

A new type of broadband printed loop antenna is presented. The antenna produces backfire linearly polarised signals over a wide band of frequencies 1.2 to 2.2 GHz, with <3 VSWR. The front-to-back ratio of the antenna is 22 dB; its on-axis cross-polarisation level is around −25 dB at 1.5 GHz and is better than –16 dB over the entire frequency band. Backfire radiation is achieved by using a novel wide printed rectangular loop radiating element with integral tapered gaps. These gaps provide the phasing necessary for the radiating elements of the antenna to enable backfire radiation in the plane of the loop. Two such printed tapered gap loops are arranged in an orthogonal configuration to produce broadband circularly polarised radiation. Here for a VSWR ≤3 the bandwidth is more than an octave (1.1 to 2.4 GHz) with an axial ratio of <4 dB. Simulated and measured results are presented for both configurations.
Waveform Controlled Welding in ASME Section IX (2010)

Metallic pipe is produced to meet API, ISO or other industry specifications. When the manufacturing process involves welding of a longitudinal or spiral seam, the welding is typically done to the standards of ASME Section IX. Girth welding of pipe is often performed using ASME Section IX standards and pulsing waveforms. In 2006, a task group was set up in ASME Section IX to explore waveform controlled welding and recommend code changes. The recommendations were submitted for approval, and the resulting code changes were published in the 2010 edition of ASME Section IX. The changes deal with the way energy or power is measured and the resulting calculation of heat input. This paper will explore differences in the measurement and calculation methods when using waveform controlled welding and discuss why these occur. The code changes will be presented. Detailed explanations will be given of how to comply with the new standards using either new or existing procedure qualifications.
Fracture of Tungsten Wire in Metal Matrix Composites (1981)

Mechanical properties were measured for the tungsten-fiber-reinforced Type 6061 aluminum and Type 1010 steel matrix composite systems. The tensile strength of the latter system was appreciably lower than the theoretical rule-of-mixture value. Auger spectroscopy and electron microprobe analysis showed significant iron contamination in the tungsten fibers. In addition, the tensile fracture mode at room temperature was shown to change from ductile to completely brittle upon annealing at 800 to 950°C, that is, just slightly above the fabrication temperature. Quantitative microanalysis showed that penetration of the iron diffusion front into the tungsten fiber coincided exactly with an annular fracture feature observed by scanning electron microscopy of tensile fracture surfaces. The strength degradation in steel/tungsten composites was due to fiber embrittlement caused partly by microstructural polygonization during the recovery process, but primarily by grain boundary diffusion of elemental iron from the steel matrix.
Planning and Scheduling: Dynamic Assignment and Scheduling with Contingencies (1998)

Abstract : Planning and scheduling under uncertainty is important in many important Air Force operations. When real time monitoring of the progress of operations is available, it is possible to replan missions in response to contingencies. In this research, we investigated a class of planning and scheduling problems under uncertainty which captured important features of risky multiplatform Air Force missions. Planning and scheduling problems under uncertainty can be solved in principle by stochastic dynamic programming techniques. These techniques require large computations for moderate problems, as they must anticipate all of the possible future events. In this research, we investigated the use of approximate stochastic dynamic programming techniques to obtain near optimal schedules which anticipate future contingencies, and which can replan in response to contingencies. These approximations are based on techniques for obtaining estimates of the future costs associated with current decisions, using techniques such as rollout of heuristic strategies, off line training of approximations, or approaches such as neuro dynamic programming. The results indicate that, in the context of the mathematical problems investigated, the performance of some approximate dynamic programming algorithms is near that of the optimal performance. Further development and evaluation will establish the viability of these techniques for Air Force mission planning problems.
Studies of human myeloid antigens using monoclonal antibodies and variant lines from the promyeloid cell line HL60. (1982)

Monoclonal antibodies were produced using mice immunized with the human promyeloid cell line HL60. Two antibodies are described which identify antigens selectively expressed by myeloid cells. Studies using normal bone marrow and myeloid leukaemia cells demonstrated that one of these antibodies (AGF4.48) identifies an antigen expressed throughout the promyeloid to neutrophil stages of maturation. In contrast, the second antibody (AGF4.36) identifies an antigen expressed at the promyeloid to metamyeloid stages and is absent from most blood neutrophils. The HL60 line can be induced to differentiate into neutrophils by 1 . 25% dimethylsulphoxide (DMSO) (Collins et al., 1978). Variant lines from HL60, unresponsive to 1 . 25% DMSO, lack the 'transient' myeloid antigen (AGF4.36) and show a reduced expression of the myeloid antigen (AGF4.48). The variant lines can be induced to mature using higher DMSO concentrations (1 . 5-1 . 75%) and do not express the 'transient' antigen (AGF4.36) during their maturation. The use of these lines in studies of myelopoiesis is discussed.
Modelling of parameterized processes via regression in the model space. (2016)

We consider the modelling of parameterized processes, where the goal is to model the process for new parameter value combinations. We compare the classical regression approach to a modular approach based on regression in the model space: First, for each process parametrization a model is learned. Second, a mapping from process parameters to model parameters is learned. We evaluate both approaches on a real and a synthetic dataset and show the advantages of the regression in the model space.
4632 Evaluation of Self-Assembled Monolayers (SAMs) by Use of Sliding Angle of Liquid Droplets (2006)

A liquid droplet on a plate slides down at a critical inclination angle of the plate. Applying the theoretical results about the sliding angle of droplets obtained in the preceding report, the surface properties of SAMs were evaluated. The advancing and receding contact angles of SAMs plates made by immersion method were measured for BCA and ethylene glycol. From the results of 4 kinds of test plates with different immersion time, the contact angle hysteresis becomes minimum (about 3°) for the reference plate (immersion time 5min) with most homogeneous monolayers among others. The experimental sliding angles agreed well with theoretical ones. The sliding angle φ of the reference plate is minimum and the difference of φ from the other plates with some defects on the surfaces is more than 6° for BCA and 4° for ethylene glycol. Hence the surface defects on SAMs plates could be detected from the simple measurements of sliding angles of droplets
Effect of adrenochrome on adenine nucleotides and mitochondrial oxidative phosphorylation in rat heart. (1986)

Effects of adrenochrome, an oxidation product of epinephrine, on myocardial energy production were investigated by studying changes in adenine nucleotide content and mitochondrial oxidative phosphorylation activities in the isolated rat heart. Perfusion of the heart with 50 mg/L adrenochrome induced a marked decline in contractile force within 5 min and this was associated with a rapid decline in the myocardial ATP/AMP ratio. A significant decrease in ATP and ATP/ADP ratio as well as a significant increase in ADP and AMP content was observed at 10 min of perfusion with adrenochrome. Furthermore, mitochondrial oxidative phosphorylation activities were unchanged except that an increase in state 4 respiration and a decrease in RCI value were seen in the heart perfused with adrenochrome for 10 min. Autoradiography of the sections from hearts perfused with 14C-adrenochrome revealed the localization of a significant amount of radioactivity on mitochondria. Adrenochrome at concentrations of 20 mg/L or higher was found to inhibit the oxidative phosphorylation activities of heart mitochondria under in vitro conditions. The depressant effects of adrenochrome on mitochondrial oxidative phosphorylation were additive to those seen with calcium. These data suggest that adrenochrome in the presence of excess calcium in the myocardial cell may impair the process of energy production in mitochondria and this may result in contractile failure of hearts exposed to this cardiotoxic metabolite of epinephrine.
Supracricoid laryngectomy with cricohyoidopexy: A partial laryngeal procedure for selected supraglottic and transglottic carcinomas (1990)

The partial horizontal supracricoid laryngectomy with cricohyoidopexy consists of resection of the whole thyroid cartilage and paraglottic space, as well as the epiglottis and the whole pre-epiglottic space. The cricoid cartilage, the hyoid bone, and at least one arytenoid cartilage are spared. Sixty-eight patients with squamous cell carcinoma of the supraglottis who underwent this procedure during the period from 1974 through 1986 are presented. Conventional horizontal supraglottic laryngectomy was contraindicated in all cases. All but three patients (95.4%) recovered physiologic deglutition, and none required a permanent tracheostomy. The 3-year actuarial survival rate was 71.4%. No local recurrences were encountered. The indications for the procedure are carcinomas of the supraglottis that 1. involve the glottis and anterior commissure, 2. invade the ventricle, 3. present with a marked limitation of true vocal cord mobility (transglottic lesions), and 4. invade the thyroid cartilage. The procedure is presented as a useful alternative to radiation therapy, horizontal supraglottic laryngectomy, and total laryngectomy in select cases of supraglottic carcinoma.
Building a distributed robot garden (2009)

This paper describes the architecture and implementation of a distributed autonomous gardening system. The garden is a mesh network of robots and plants. The gardening robots are mobile manipulators with an eye-in-hand camera. They are capable of locating plants in the garden, watering them, and locating and grasping fruit. The plants are potted cherry tomatoes enhanced with sensors and computation to monitor their well-being (e.g. soil humidity, state of fruits) and with networking to communicate servicing requests to the robots. Task allocation, sensing and manipulation are distributed in the system and de-centrally coordinated. We describe the architecture of this system and present experimental results for navigation, object recognition and manipulation.
Computational Comparison of Shock Wave Propagation in Explosive Blast and Shock Tube Experiments (2013)

In this study, detonation of TNT was simulated using an FE code and the resulting mechanical behavior of air, in which the explosion took place, was studied as a function of distance. Incident and reflected pressure and impulse profiles were compared with published data. In addition, an FE model of a shock tube setup at Temple University was developed using equations of state for Helium and air as the driver and driven fluids. The characteristics of the shock wave developed from explosive blast and shock tube were compared. It was shown that merely the two variables commonly used in the literature to compare the results from a shock tube to that of blast, i.e., peak incident pressure and positive duration, could not thoroughly include all the characteristics of the shock wave. Other parameters such as reflected pressure and impulse, which includes the velocity of the particles in addition to the pressure, are also needed to describe the shock wave.
Intramolecular hydrogen bonding and conformation of a dipyrrolic derivative (1995)

Abstract The conformation of 1‐phenyl‐1‐(1,2‐dimethyl‐5‐pyrrolyl)‐2‐(2‐methyl‐5‐benzoyl‐1‐pyrroly)ethanol, with characteristics of a molecular propeller, is stabilized by intramolecular hydrogen bonding as detected by 1 H NMR, NOE difference experiments, 2D NMR, COSY, 13 C NMR, HETCOR, HMBC and 1 H NMR variable‐temperature experiments.
Initial Observations of the Pioneer Venus Orbiter Solar Wind Plasma Experiment (1979)

Initial results of observations of the solar wind interaction with Venus indicate that Venus has a well-defined, strong, standing bow shock wave. Downstream from the shock, an ionosheath is observed in which the compressed and heated postshock plasma evidently interacts directly with the Venus ionosphere. Plasma ion velocity deflections observed within the ionosheath are consistent with flow around the blunt shape of the ionopause. The ionopause boundary is observed and defined by this experiment as the location where the ionosheath ion flow is first excluded. The positions of the bow shock and ionopause are variable and appear to respond to changes in the external solar wind pressure. Near the terminator the bow shock was observed at altitudes of approximately 4600 to approximately 12,000 kilometers. The ionopause altitutde ranged fromn as low as approximately 450 to approximately 1950 kilometers. Within the Venus ionosphere low-energy ions (energy per untit charge < 30 volts) were detected and have been tentatively idtentified as nonflowing ionospheric ions incident from a direction along the spacecraft velocity vector.
Study on online monitoring system of PEMFC resistance based on electrochemical impedance spectroscopy (2009)

The ohmic resistance of proton exchange membrance fuel cell(PEMFC) is mostly decided by PEM's water content, which can directly affect the efficiency of electricity generation, so it is very important for the measurement and control of PEMFC's humidity by means of monitoring its internal resistance. However, the internal resistance is hard to measure exactly because of its non-linear and time-varying charateristic. To solve this problem, In this paper we propose a methodology based on Electrochemical Impedence Spectroscopy (EIS) to guide the hardware and software design of online montoring system of PEMFC internal resistance, and the experiment results prove that good effect is achieved by adopting this method.