gebhart/patrepeval huggingface dataset:
A Field Method for Controlling Drillstring Torsional Vibrations (1992)

Abstract Torsional vibrations are detrimental to the life of drillstring components (1,2,3,4). Although methods of controlling them have been proposed (1,3,4), their general dependence on strain gauges to measure drillstring torque make them unsuitable for the drilling environment. In this paper we describe a new, practical, system which does not use such a sensor, and present extensive field test results taken from a semisubmersible rig drilling in the North Sea. The system was shown to be very effective in suppressing torsional vibrations. It uses measurements of motor current, acceleration and a microprocessor to modulate the drive to the motor. An analysis is given to show that not only does the system performs just as well as one using a strain gauges sensor, but it also performs better than a system which uses motor current only. Considerations for the system design are also discussed. A significant reduction of drillstring torsional vibrations, DTV's, will reduce the cost of drilling wells by reducing damage to drillstring components and lost rig time. Drilling efficiency is enhanced through the suppression of "stick-slip" motion at the bit.
Exploitation of map data for the perception of intelligent vehicles (2015)

This thesis is situated in the domains of robotics and data fusion, and concerns geographic information systems. We study the utility of adding digital maps, which model the urban environment in which the vehicle evolves, as a virtual sensor improving the perception results. Indeed, the maps contain a phenomenal quantity of information about the environment : its geometry, topology and additional contextual information. In this work, we extract road surface geometry and building models in order to deduce the context and the characteristics of each detected object. Our method is based on an extension of occupancy grids : the evidential perception grids. It permits to model explicitly the uncertainty related to the map and sensor data. By this means, the approach presents also the advantage of representing homogeneously the data originating from various sources : lidar, camera or maps. The maps are handled on equal terms with the physical sensors. This approach allows us to add geographic information without imputing unduly importance to it, which is essential in presence of errors. In our approach, the information fusion result, stored in a perception grid, is used to predict the stateof environment on the next instant. The fact of estimating the characteristics of dynamic elements does not satisfy the hypothesis of static world. Therefore, it is necessary to adjust the level of certainty attributed to these pieces of information. We do so by applying the temporal discounting. Due to the fact that existing methods are not well suited for this application, we propose a family of discoun toperators that take into account the type of handled information. The studied algorithms have been validated through tests on real data. We have thus developed the prototypes in Matlab and the C++ software based on Pacpus framework. Thanks to them, we present the results of experiments performed in real conditions.
Psychological assessment measures of female sexual functioning in clinical trials. (1998)

The focus of this review is on the psychological measurement of female sexual functioning, and the particular requirements associated with the implementation of psychological instruments as outcomes measures in clinical trials. In addition to the general psychometric criteria which must be met by all psychological measures, unique confounds associated with the nosology of female sexual dysfunctions are also discussed. A rationale for the utilization of measurement models closely tied to the sexual response cycle is articulated, and five specific test instruments which reflect this rationale to varying degrees are reviewed as to their psychometric characteristics, and validity as potential outcomes measures in clinical trials.
Behavioral and physiological effects of a beta blocker and relaxation therapy on mild hypertensives. (1989)

In this industrial-based study we compared the blood pressure (BP)-lowering effectiveness of relaxation, a beta blocker, and the combined use of these two treatments in 47 untreated, mildly hypertensive blue collar steel workers. Using a randomized two by two factorial design, patients received either nadolol or placebo drug daily, and either a relaxation training or an education program, each lasting 8 weeks. A pre-intervention and post-intervention stress test measured response of heart rate and BP to mental and physical tasks. BP assessments were done at baseline, post-intervention, 1 month, and 3 month follow-up. Change in several self-report measures was determined. Results showed that beta blocker was more effective in lowering BP than placebo, but relaxation was not more effective in lowering BP than health education. The combined effect of beta blocker and relaxation was not superior to beta blocker alone. Compliance with relaxation practice was not superior to compliance with medication. We conclude that pharmacologic treatment is superior to the relaxation therapy tested.
Frequency discrimination in bobwhite quail (Colinus virginianus). (1985)

Bobwhite quail (Colinus virginianus) (N:9, aged 24 mo) were trained using a positive reinforcement paradigm to respond to an assigned "standard" frequency of either 1.0 or 3.5 kc/s by pressing a response key. Each S was trained in 2 phases to respond to its assigned frequency rather than to alternately presented tones of a different frequency. In every test each S discriminated its assigned frequency at greater than chance levels. Discrimination ability was poorest when delta F was at the minimum tested (0.25 kc/s). Birds whose standard frequency was 1.0 kc/s were better at the task than those trained to a 3.5-kc/s standard, especially when finer discriminations were required (Phase II). This superiority at 1.0 kc/s confirmed what was seen previously (Barton et al, J. Aud. Res., 1984, 24, 87-97) in the Bobwhite's audibility curve; it was hypothesized that the correspondence may have to do with the need for adult birds to recognize frequency variations near 1.0 kc/s that are uniquely made by immediate conspecifics rather than other members of the species. As such it may well represent a "fine tuning" of the bird's acoustic abilities.
Biredox Eutectic Electrolytes Derived from Organic Redox‐Active Molecules: High‐Energy Storage Systems (2019)

Abstract One promising candidate for high‐energy storage systems is the nonaqueous redox flow battery (NARFB). However, their application is limited by low solubility of redox‐active materials and poor performance at high current density. Reported here is a new strategy, a biredox eutectic, as the sole electrolyte for NARFB to achieve a significantly higher concentration of redox‐active materials and enhance the cell performance. Without other auxiliary solvents, the biredox eutectic electrolyte is formed directly by the molecular interactions between two different redox‐active molecules. Such a unique electrolyte possesses high concentration with low viscosity (3.5 m , for N ‐butylphthalimide and 1,1‐dimethylferrocene system) and a relatively high working voltage of 1.8 V, enabling high capacity and energy density of NARFB. The resulting high‐performance NARFB demonstrates that the biredox eutectic based strategy is potentially promising for low‐cost and high‐energy storage systems.
Application of Computational Redundancy in Dangling Pointers Detection (2006)

Many programmers manipulate dynamic data improperly, which may produce dynamic memory problems, such as dangling pointer. Dangling pointers can occur when a function returns a pointer to an automatic variable, or when trying to access a deleted object. The existence of dangling pointers causes the programs to behave incorrectly. Dangling pointers are common defect that are easy to commit, but are difficult to discover. In this paper we propose a dynamic approach that detects dangling pointers in computer programs. Redundant computation is an execution of a program statement(s) that does not contribute to the program output. The notion of redundant computation is introduced as a potential indicator of defects in programs. We investigate the application of redundant computation in dangling pointers detection. The results of the initial experiment show that, the redundant computation detection can help the debuggers to localize the source(s) of the dangling pointers. During the experiment, we find that, our approach may be capable of detecting other types of dynamic memory problems such as memory leaks and inaccessible objects, which we plan to investigate in our future research.
Endothelial-Specific Transgenesis of TNFR2 Promotes Adaptive Arteriogenesis and Angiogenesis (2010)

These in vivo data support a critical role for endothelial TNFR2 in ischemia-mediated adaptive angiogenesis. Therefore, specific expression and activation of TNFR2 in ECs may provide a novel strategy for the treatment of vascular diseases such as coronary artery disease and peripheral arterial disease.
Kaliski's explosive driven fusion experiments (1979)

An experiment performed by a group in Poland on the production of DD fusion neutrons by purely explosive means is discussed. A method for multiplying shock velocities ordinarily available from high explosives by a factor of ten is described, and its application to DD fusion experiments is discussed.
Gradient-Based Camera Exposure Control for Outdoor Mobile Platforms (2018)

We introduce a novel method to automatically adjust camera exposure for image processing and computer vision applications on mobile robot platforms. Because most image processing algorithms rely heavily on low-level image features that are based mainly on local gradient information, we consider that gradient quantity can determine the proper exposure level, allowing a camera to capture the important image features in a manner robust to illumination conditions. We then extend this concept to a multi-camera system and present a new control algorithm to achieve both brightness consistency between adjacent cameras and a proper exposure level for each camera. We implement our prototype system with off-the-shelf machine-vision cameras and demonstrate the effectiveness of the proposed algorithms on practical applications, including pedestrian detection, visual odometry, surround-view imaging, panoramic imaging, and stereo matching.
Geometry-Scalable Parasitic Deembedding Methodology for On-Wafer Microwave Characterization of MOSFETs (2009)

This paper presents a geometry-scalable parasitic deembedding technique for on-wafer <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">S</i> -parameter measurements of silicon MOSFETs. The proposed methodology is based on the transmission-line theory and the cascade and parallel combinations of two-port networks. We use only one ¿reflect¿ and one ¿thru¿ dummy structure on a wafer to remove the feeding networks with arbitrary geometry surrounding the MOS transistors. The shielding technique is employed to improve the substrate isolation and fixture scalability. To mitigate the parasitic effects of the dangling leg between the MOSFET and the ground plane, microstriplike interconnects are introduced to mount the devices. Full-wave electromagnetic simulations were also accomplished to substantiate the interconnect scalability and network combinations. The MOS transistors and deembedding dummy patterns were implemented in a 0.13-¿m standard CMOS technology and characterized up to 30 GHz. Compared with the conventional deembedding methods, the proposed approach consumes less than 33% of chip area and characterization time for modeling test keys, while still maintaining high accuracy.
Treatment of recurrent hepatitis C (2002)

1. Treatment of established recurrent hepatitis C with interferon-alpha monotherapy does not achieve sustained virologic response (SVR). 2. Treatment of established recurrent hepatitis C with combination interferon plus ribavirin achieves SVR rates of 17% to 27%, but dropout rates approach 30%. 3. Pretransplant prophylaxis against recurrent hepatitis C with combination interferon plus ribavirin is poorly tolerated in patients with decompensated hepatitis C cirrhosis. 4. Posttransplant prophylaxis with combination interferon plus ribavirin prevents both recurrent viremia and hepatitis in 15% to 20% of patients, but dropout rates approach 50%. 5. Hepatitis C virus genotype is the best predictor of response to antiviral prophylaxis and treatment of recurrent hepatitis C. 6. Interferon-alpha therapy is not associated with an increased risk of allograft rejection in liver transplant recipients. 7. Ribavirin therapy is associated with increased hemolysis in liver transplant recipients. 8. Preliminary data suggest pegylated interferon monotherapy will have similar efficacy but better tolerability than combination interferon plus ribavirin. 9. In a recent study, posttransplant immunoprophylaxis with polyclonal hepatitis C immunoglobulin had no effect on recurrent viremia or hepatitis.
STRAIGHT-LINE CORRESPONDENCES FROM AN IMAGE SEQUENCE FOR AUTONOMOUS VEHICLE DRIVING (1993)

In the guidance system for an autonomous vehicle, the vision task is particularly important, as it is fundamental for the system to be able to recover the structure of the surrounding environment, to recognize other vehicles present in a scene, and to estimate their motion. For the algorithm presented in this paper, a token-based approach to the matching process is applied. This uses straight lines as significant features. Straight lines are extracted by means of a modified version of the Hough Transform, called the Direct Hough Transform (DHT), which includes the information about the endpoints of segments. The algorithm proposed for the matching of straight lines is particularly fast, as it needs only three steps. Firstly, the search range is reduced by working directly in the Hough parameter space. A matching function for each pair of segments selected previously is then determined. The segment pairs that satisfy the match are then extracted. The algorithm has been tested on both synthetic and real images representing road scenes, and good results have been obtained. (A) For the covering abstract see IRRD 859610.
Millimeter Resonance Isolators Utilizing Hexagonal Ferrites (1963)

Ferrimagnetic resonance isolators operating over waveguide bandwidths have been developed in K, V and Q bands using hexagonal ferrites. Preliminary results on similar isolators operating in M and W bands have also been obtained. The materials employed in these isolators are highly anisotropic uniaxial hexagonal compounds. The compounds of interest for the first three frequency bands are from the Ni/sub 2/W family. The anisotropy field of Ni/sub 2/W is 12.6 kilo-oersteds (Koe). This uniaxial anisotropy field can be controlled over the range of 4 to 12.6 Koe by producing solid solutions of the above compound with that of Zn/sub 2/W and/or Co/sub 2/W, and controlled over the range of 12.6-19.0 Koe by aluminum substitutions. The following operating characteristics have been obtained over the full waveguide bands: K band (18-26.5 Gc), isolation (minimum)---25 db, insertion loss (maximum)---0.7 db, VSWR (maximum)--- 1.15, applied field---1000 oersteds, length---4 1/2 inches weight---6 1/2 ounces; v band (26.5-40 Gc), isolation (minimum)---25 db, insertion loss (maximum)---1.25 db, VSWR (maximum)---1.15, applied field---1000 oersteds, length---4 inches, weight---6 ounces; Q band (33-50 Gc), isolation (minimum)---25 db, insertion loss (maximum) ---1.5 db, VSWR (maximum)---1.15, applied field---1000 oersteds, length---3 1/2 inches, weight---5 1/2 ounces. Improved attenuation ratios and size are obtained when the band-width is reduced. Examples of this are K band where a ratio of 40 to 1 is maintained over a 4-Gc bandwidth in a 3-inch unit, and V band where a ratio of 40 to 1 is maintained over a 5-Gc bandwidth in a 2-inch unit. At the present time the M (50-75 Gc) and W (75-110 Gc) band units provide attenuation ratios exceeding 10 to 1 over 5-Gc bandwidths.
Estimation of methane emission flux at landfill surface using laser methane detector: Influence of gauge pressure (2016)

The aim of this study was to investigate the possibility of measuring methane emission fluxes, using surface methane concentration and gauge pressure, by analyzing the influence of gauge pressure on the methane emission flux and the surface methane concentration, as well as the correlation between the methane emission flux and surface methane concentrations. The surface methane concentration was measured using a laser methane detector. Our results show a positive linear relationship between the surface methane concentration and the methane emission flux. Furthermore, the methane emission flux showed a positive linear relationship with the gauge pressure; this implies that when the surface methane concentration and the surface gauge pressure are measured simultaneously, the methane emission flux can be calculated using Darcy's law. A decrease in the vertical permeability was observed when the gauge pressure was increased, because reducing the vertical permeability may lead to a reduced landfill gas emission to the atmosphere, and landfill gas would be accumulated inside the landfill. Finally, this method is simple and can allow for a greater number of measurements during a relatively shorter period. Thus, it provides a better representation of the significant space and time variations in methane emission fluxes.
Muscle Biopsy: A Practical Approach (1986)

of human behaviour.At least in the world of great clinical and histopathological experi-Parkinson's disease these distinguished men ence of the principal author and emphasises usually travel alone, being invited personally the need for expertise in both areas to solve to meetings in order to raise the level of de-most muscle problems.bate, and cast a few of their perceptive
Simple, efficient reduction column for use in the automated determination of nitrate in water (1974)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimple, efficient reduction column for use in the automated determination of nitrate in waterM. P. StaintonCite this: Anal. Chem. 1974, 46, 11, 1616Publication Date (Print):September 1, 1974Publication History Published online1 May 2002Published inissue 1 September 1974https://pubs.acs.org/doi/10.1021/ac60347a051https://doi.org/10.1021/ac60347a051research-articleACS PublicationsRequest reuse permissionsArticle Views720Altmetric-Citations55LEARN 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
The ALARA (as low as reasonably achievable) concept in pediatric interventional and fluoroscopic imaging: striving to keep radiation doses as low as possible during fluoroscopy of pediatric patients—a white paper executive summary (2006)

ALARA represents a practice mandate adhering to the principle of keeping radiation doses to patients and personnel As Low As Reasonably Achievable. This concept is strongly endorsed by the Society for Pediatric Radiology, particularly in the use of procedures and modalities involving higher radiation doses such as CT and fluoroscopic examinations of pediatric patients. There is no doubt that medical imaging, which has undergone tremendous technological advances in recent decades, is integral to patient care. However, these technological advances generally precede the knowledge of end-users concerning the optimal use and correct operation of the resulting imaging equipment, and such knowledge is essential to minimizing potential risks to the patients.

Current imaging methods must be optimized for radiation dose reduction in pediatric patients who might be as much as ten times more radiosensitive than adults. Unlike straightforward radiographic examinations, radiation dose to the patient during fluoroscopy is dependent on the operator’s training, experience with the fluoroscope, and efficiency in completing a diagnostic study. The range of pediatric radiation doses from fluoroscopy is wide because this examination is performed not only by pediatric radiologists but also by general radiologists who occasionally care for children, interventional cardiologists, gastroenterologists, urologists and others. Thus, a venue where multidisciplinary interaction by this variety of operators can occur serves to improve pediatric patient care.

The third ALARA conference organized by the Society for Pediatric Radiology was held in Orlando, Fla., on 11–2 February 2006. It was co-sponsored by the Office of Rare Diseases and the National Cancer Institute of the National Institutes of Health (NCI/NIH). The conference was funded by unrestricted educational grants from three manufacturers of fluoroscopic and interventional equipment (GE, Philips, Siemens) and financial support from the Society for Pediatric Radiology and NCI/NIH. The 22 faculty members consisted of 8 pediatric radiologists, 5 medical physicists, 3 pediatric subspecialists, 3 industry speakers, and 3 radiation epidemiology researchers. A diverse cadre of 74 pediatric radiologists, medical physicists, radiologic technologists, researchers, pediatric subspecialists and vendors met to examine the risk of radiation exposure from fluoroscopic and interventional procedures, identify means by which to reduce ionizing radiation exposure, and explore future technologic modifications that could optimize imaging while further reducing radiation exposures.
Electromechanical analysis of defects in piezoelectric materials (1996)

In this paper, electromechanical analysis is performed based on an extended Stroh formalism which considers the constitutive law of a linear anisotropic piezoelectric medium, the kinematics of two-dimensional small deformations and static equilibrium. By this formalism, several analytical closed-form solutions are obtained for holes, cracks or interface cracks in an infinite piezoelectric medium under various loading conditions. To have a practical use for engineering analyses, the Green's functions obtained from point load condition are embedded into the usual boundary integral equations. Thus, a special boundary element is developed to deal with the problems with finite boundaries.