gebhart/patrepeval huggingface dataset:
Evaluating E-marketplace Mobile Application Based on People At the Center of Mobile Application Development (PACMAD) Usability Model (2019)

The existence of e-marketplace on mobile platform facilitates transactions anywhere and anytime, making e-commerce in Indonesia grow rapidly. Competitive pressure on e-marketplace demands continuous improvement. Usability is an important aspect of e-commerce because today's consumers are not only satisfied with the mobile app that simply allow them to shop, the experience must also be pleasant. This study evaluates the usability of the three most popular mobile applications in Indonesia: Tokopedia, Bukalapak, and Shopee. The evaluation based on the People at the Center of Mobile Application Development (PACMAD) usability model developed by emphasizing limitations and characteristics of mobile devices. The usability evaluation includes seven aspects: effectiveness, efficiency, learnability, memorability, errors, satisfaction, and cognitive load. The results are Bukalapak was leading in almost all aspects: effectiveness, efficiency, learnability, memorability, errors, and cognitive load, followed by Tokopedia and Shopee. Bukalapak was excel because not only the interactions were simple and easy but also it worked well when the connection was interrupted. However, it turns out various promotions given by Shopee affected user perceptions about the usability of the application, resulted that Shopee was preferably and had the highest score of satisfaction.
Single lead Electrocardiogram feature extraction for the human verification (2015)

Over the past years, Electrocardiogram (ECG) as a biometric characteristic, has been investigated in several works. The human heart is physiologically a liveness indicator. Feasibility of continuous signal acquisition and demonstration of subject aliveness, are the most important properties of ECG based authentication systems which makes them different from common authentication methods like fingerprints. In this paper, after signal denoising, two different feature extraction methods are proposed. By selecting reference beats, four artificial features are generated for every extracted feature and then they are classified using five different classifiers. As it is worthwhile to have a verification system with low number of features, the proposed method achieved to %99.38±0.04 accuracy and %0.62±0.04 EER with 5 features and SVM classifier.
Microstructure of Silicon Nitride Containing β‐Phase Seeds: II (2002)

The microstructure of silicon nitride containing different percentages of β‐seeds was investigated. The average grain size and volume fraction of large grains increased with the incorporation of β‐seeds. The length and aspect ratio of large grains in sintered Si 3 N 4 initially increased by incorporating β‐seeds, and then decreased. Similar trends were observed in the fracture toughness. The toughening mechanisms and fracture behaviors were correlated with the grain morphology measured from image analysis. Plots of measured toughness versus volume fraction of large grains fit very well with the equation derived by Becher and Budiansky, which strongly suggested the essential role of debonding length in the toughness of silicon nitride. Further improvement of fracture toughness in silicon nitride may be possible by tailoring the amount of incorporated β‐phase seeds and leading to optimize the volume fraction, grain size, and aspect ratio of the elongated grains.
Single Mode Microwave Heating of Copper Powder Metal Compacts (2006)

We present numerical simulations that complement our experimental results of the microwave heating of copper powder metal compacts in separate electric (E) and magnetic (H) fields of a TE102 cavity. In general, thermal dissipation in the compacts may be attributed to resistive heating, dielectric losses, and magnetic losses. These dissipative mechanisms are coupled to the fields by the effective conductivity, effective complex permittivity, and effective complex permeability of the compacts, respectively. We model the fields of the cavity and the heating trends of the compacts by incorporating the separate losses into COMSOL using independently measured values of the electromagnetic parameters. The simulation results show good agreement with experimental ones and help to provide a self-consistent picture of the interaction of microwave fields with powdered metals.
THE TITANIUM/SILICONE RUBBER CLIP FOR FEMALE STERILIZATION (1981)

Summary A composite titanium/silicone rubber clip has been developed for female sterilization. The 12–7 mm long metal clip is lined with silicone rubber and is bent round the Fallopian tube by means of an applicator that can be used laparoscopically. As tubal necrosis occurs, the rubber expands to keep the lumen blocked. The tube eventually divides and the stumps heal, closed. Since the Mark 3 version of the clip was introduced, over 5700 women in several countries have been sterilized. The first 540 British women who were folio wed‐up for five to 17 months experienced one method failure (ectopic) and two operator failures, a total failure rate of 5·5/ 1000. Clip‐related complications were minimal and long‐term sequelae were comparable to tubal ligation. The clip causes minimal destruction but still seems effective for tubal occlusion and it can accommodate thick tubes.
Early healing rates and wound area measurements are reliable predictors of later complete wound closure (2008)

This study was undertaken to determine if healing rates are reliable early predictors of ultimate complete wound closure in venous leg ulcers and diabetic foot wounds. We conducted a retrospective analysis of 306 venous leg ulcers and 241 diabetic foot ulcers enrolled in two large controlled, prospective, randomized pivotal trials to compare topical wound treatments, to determine whether certain early markers of healing could be correlated with later total wound closure. Two-sided tests at 95% confidence demonstrated that wound margin advance, initial healing rate, percent wound surface area reduction, and wound healing trajectories (all p<0.001) were powerful predictors of complete wound healing at 12 weeks. Wounds with poor healing progress by these criteria at 4 weeks were highly likely to remain unhealed after 8 additional weeks of treatment. Analysis of the diabetic foot ulcers and venous leg ulcers subgroups separately demonstrated consistent statistical test results with high significance; similarly, the results remained valid independent of the topical treatment used. The early prediction of eventual wound healing or nonhealing using early healing rates may enable more efficient triage of patients to advanced healing technologies. We believe that these surrogate markers are robust predictors of healing regardless of wound etiology and that they merit wider use in clinical trials and routine patient care.
Polar Anionic Metabolome Analysis by Nano-LC/MS with a Metal Chelating Agent (2009)

We have developed a practical method for the comprehensive analysis of polar anionic metabolites in biological samples with the use of a nano-LC/MS system. A polyamine-bonded polymer-based apHera NH2 column, which is compatible with ammonium carbonate buffer, effectively retained anionic polar metabolites, such as organic acids, sulfates, and phosphates, but multiply phosphorylated or carboxylated compounds showed highly distorted peak shapes on chromatograms. We found that addition of a trace amount of the metal chelating reagent ethylenediaminetetraacetic acid (EDTA) to the sample solution dramatically improved peak shapes of multiply charged anionic compounds, even though the mass spectra showed no trace of adduct ions in the absence of EDTA. The detection limits of typical polar anionic metabolites in the full-scan mode were from 0.19 to 2.81 pmol. After optimization of all the procedures from sample preparation to nano-LC/MS analysis, we applied our method to real biological samples: Hela cells, mouse brain, human cerebrospinal fluid (CSF), and human plasma. Our results indicated that phosphorylated metabolites were abundant in Hela cells and brain, while plasma and cerebrospinal fluid (CSF) mostly contained organic acids. Phosphorylated compounds might not be secreted into CSF/plasma or might be unstable in CSF/plasma. Finally, the method was used to examine the mode of action of the anticancer drug methotrexate (MTX), which inhibits purine de novo biosynthesis and thymidine biosynthesis. In addition of the expected changes of metabolite levels, we found that a previously unreported metabolite, probably a methylated uridine 5'-triphosphate (UTP), was produced by MTX-treated Hela cells.
Magnetic-flux quanta in superconducting thin films observed by electron holography and digital phase analysis (1991)

Singly quantized magnetic fluxes in superconducting lead films have been directly observed in the form of magnetic-flux-line distributions by using an electron-holography technique. Combining this with the digital-phase-analysis method, we were able to determine the flux quantum h/2e for individual fluxes with a precision of \ensuremath{\sim}h/100e, and analyze the distributions of field-vector components around the fluxon centers. The internal-field distributions obtained were compared with those calculated from the Ginzburg-Landau equations with use of some models, and an overall agreement was found between them. We also observed the changes of the magnetic-flux structures of lead thin films as a function of their thickness. Fluxon pairs were observed in 0.2-\ensuremath{\mu}m-thick films, which may correspond to those suggested by Kosterlitz-Thouless theory.
Characteristics of relaxor-based piezoelectric single crystals for ultrasonic transducers (2002)

For ultrasonic transducers, piezoelectric ceramics offer a range of dielectric constants (K/spl sim/1000-5000), large piezoelectric coefficients (d/sub ij//spl sim/200-700 pC/N), and high electromechanical coupling (k/sub T//spl cong/50%, k/sub 33//spl cong/75%). For several decades, the material of choice has been polycrystalline ceramics based on the solid solution Pb(Zr/sub 1-x/,Ti/sub x/)O/sub 3/ (PZT), compositionally engineered near the morphotropic phase boundary (MPB). The search for alternative MPB systems has led researchers to revisit relaxor-based materials with the general formula Pb(B/sub 1/,B/sub 2/)O/sub 3/ (B/sub 1/:Zn/sup 2+/, Mg/sup 2+/, Sc/sup 3+/, Ni/sup 2+/..., B/sub 2/:Nb/sup 5+/, Ta/sup 5+/...). There are some claims of superior dielectric and piezoelectric performance compared to that of PZT materials. However, when the properties are examined relative to transition temperature (Tc), these differences are not significant. In the single crystal form, however, relaxor-PT materials, represented by Pb(Zn/sub 1/3/Nb/sub 2/3/)O/sub 3/-PbTiO/sub 3/ (PZN-PT), Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-PbTiO/sub 3/ (PMN-PT) have been found to exhibit longitudinal coupling coefficients (k/sub 33/)>90%, thickness coupling (k/sub T/)>63%, dielectric constants ranging from 1000 to 5000 with low dielectric loss <1%, and exceptional piezoelectric coefficients d/sub 33/>2000 pC/N, the latter promising for high energy density actuators. For single crystal piezoelectrics to become the next generation material of ultrasonic transducers, further investigation in crystal growth, device fabrication and testing are required.
Estimating porosity from 3D seismic inversion and 3D geostatistics (1997)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1997Estimating porosity from 3D seismic inversion and 3D geostatisticsAuthors: John V. PendrelPaul Van RielJohn V. PendrelJason Geosystems Canada and Paul Van RielJason Geosystems B. V., The Netherlandshttps://doi.org/10.1190/1.1886142 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1886142FiguresReferencesRelatedDetailsCited ByHigh-resolution acoustic impedance inversion to characterize turbidites at Marlim Field, Campos Basin, BrazilInterpretation, Vol. 2, No. 3Inversion and interpretation of a 3D seismic data set from the Ouachita Mountains, OklahomaAbuduwali Aibaidula and George McMechan20 February 2009 | GEOPHYSICS, Vol. 74, No. 2Viscoelastic true-amplitude prestack reverse-time depth migrationGEOPHYSICS, Vol. 73, No. 4Sensitivity analysis of data-related factors controlling AVA simultaneous inversion of partially stacked seismic amplitude data: Application to deepwater hydrocarbon reservoirs in the central Gulf of MexicoGEOPHYSICS, Vol. 72, No. 1Seismic impedance inversion and interpretation of a gas carbonate reservoir in the Alberta Foothills, western CanadaGEOPHYSICS, Vol. 68, No. 5Processing, inversion, and interpretation of a 2D seismic data set from the North Viking Graben, North SeaGEOPHYSICS, Vol. 68, No. 3 SEG Technical Program Expanded Abstracts 1997ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1997 Pages: 2067 publication data© 1997 Copyright © 1997 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 10 Feb 2005 CITATION INFORMATION John V. Pendrel and Paul Van Riel, (1997), "Estimating porosity from 3D seismic inversion and 3D geostatistics," SEG Technical Program Expanded Abstracts : 834-837. https://doi.org/10.1190/1.1886142 Plain-Language Summary PDF DownloadLoading ...
Interleukin‐1<i>β</i>converting enzyme: A novel cysteine protease required for IL‐1<i>β</i> production and implicated in programmed cell death (1995)

Interleukin-1 beta converting enzyme is the first member of a new class of cysteine proteases. The most distinguishing feature of this family is a nearly absolute specificity for cleavage at aspartic acid. This enzyme has been the subject of intense research because of its role in the production of IL-1 beta, a key mediator of inflammation. These studies have culminated in the design of potent inhibitors and determination of its crystal structure. The structure secures the relationship of the enzyme to CED-3, the product of a gene required for programmed cell death in Caenorhabditis elegans, suggesting that members of this family function in cell death in vertebrates.
Angiotensin II and Proximal Tubule Sodium Transport (1991)

As a target site for angiotensin II (A-II), renal proximal tubule is unique in that it may be equipped with a local A-II generating system and that both basolateral and apical membranes may be accessible for A-II's action. We have recently conducted studies to examine these possibilities. With in vitro cultured proximal tubular cells, we have demonstrated de novo synthesis of angiotensinogen and renin. With isolated renal brush border membrane (BBM), we have confirmed the presence of A-II receptors and found that A-II directly stimulated BBM Na(+)-H+ exchange. In search of the signal transduction mechanism, we have found that A-II also activated BBM phospholipase A2 (PLA) and that BBM contained a pertussis toxin-sensitive guanine nucleotide binding protein (G-protein) which mediates the effects of A-II. Further studies showed that prevention of PLA activation abolished A-II's effect on Na(+)-H+ exchange, and that activation of PLA by mellitin and addition of arachidonic acid similarly enhanced Na(+)-H+ exchange activity, suggesting that PLA activation may mediate the stimulatory effect of A-II on Na(+)-H+ exchange. These results thus indicate that a local signal transduction mechanism involving G-protein mediated PLA activation exists in renal BBM which mediates A-II's effect on Na(+)-H+ exchange. Taken together, we propose that, independent of A-II in the circulation, local luminal A-II may serve as an important regulatory system on sodium transport in renal proximal tubule.
Avalanche enhancement of optical nonlinearities in semiconductor junctions (1990)

We examine the effects of avalanche processes on several classes of nonlinear optical interactions in semiconductor junctions. A silicon avalanche photodiode (APD) geometry is predicted to provide large enhancements of both the electronic nonlinearity (free-carrier plasma interaction) as well as the thermal nonlinearity. The thermal nonlinearity at a wavelength λ=1.06 μm in an APD is examined under normal operating conditions and a nonlinear interaction more than 5000 times that of the unbiased diode is observed.
Pd−Smopex-111:  A New Catalyst for Heck and Suzuki Cross-Coupling Reactions (2007)

Smopex-111, a commercially available metal-scavenging styryl thiol-grafted polyolefin fiber was treated with palladium acetate giving a reagent with a palladium loading of 4.4−4.7 (wt %). The Pd−Smopex-111 thus generated was found to be a highly active catalyst for Heck and Suzuki coupling reactions and was found to be reusable with negligible leaching of palladium.
Constrained Adaptive Backstepping Controller Design for Aircraft Landing in Wind Disturbance and Actuator Stuck (2012)

An adaptive backstepping controller is designed for the automatic landing of a fixed-wing aircraft. The backstepping control scheme is adopted by using the nonlinear six degree-of-freedom dynamics of the aircraft during the landing phase. The adaptive law is integrated along with the backstepping controller in order to estimate the aircraft modeling errors as well as the external disturbance. The dynamic constraints of the states and the actuator inputs are taken into account in the parameter adaptation. This is done to prevent an aggressive adaptation and to provide reliable control commands. Numerical simulations were performed to verify the performance of the proposed control law for the landing of the aircraft with the presence of gust and actuator stuck.
How to Fix the Position of the Classical literature in the Chinese Department (2008)

Sometimes,innovation means to find a new place for an object.So,it is discussed of the position of the course of classical literature concerning the factors of education,target of education and methodology.
DISEASES, PARASITES AND SURVIVAL OF COYOTES IN SOUTH-CENTRAL GEORGIA (1992)

Serologic testing, radio-telemetry and post-mortem diagnostic evaluations were used to investigate survival and causes of mortality among 17 coyotes (Canis latrans) in south-central Georgia (USA). Prevalence of canine heartworm (Dirofilaria immitis) microfilariae was lower (P = 0.057) among fall-captured (22%) than among winter-captured (75%) coyotes. Prevalence of heartworm was higher among adults than juveniles in the fall, but no significant difference was detected between animals captured in winter. Antibodies were found against canine parvovirus (65%), canine parainfluenza virus (59%), infectious canine hepatitis virus (41%), and Toxoplasma gondii (18%). Antibodies were not found to Brucella canis, canine coronavirus, five serovars of Leptospira interrogans, or canine distemper virus. Seroprevalence of canine parvovirus was lower (P = 0.009) among fall-captured animals (33%) than winter-captured animals (100%). The Kaplan-Meier estimate of annual survival was 0.500 for all animals. Juvenile survival did not differ (P = 0.79) from adult survival, but male survival (S = 0.217) was lower (P = 0.11) than female survival (S = 0.804). Two of nine (22%) mortalities were human-caused, one was due to concurrent canine parvovirus and canine distemper virus infections, one animal died of trauma, two were considered natural mortalities of unknown cause, and no cause of death could be determined for the remaining three animals. Natural mortality may be significant for coyotes in south-central Georgia, although there was no apparent link between exposure to pathogens and the animals' subsequent fate in our small sample.
Changes in Selected Nutrient Contents and in Protein Quality of Common and Quality-Protein Maize During Rural Tortilla Preparation (1990)

Cereal Chem. 67(6):515-518 A total of eleven common maize cultivars and one variety of quality- results showed increases in Ca and Mg from raw maize to tortilla and protein maize (QPM) called Nutricta were processed into cooked maize a small decreases in Na and K. Total dietary fiber decreased from raw and tortillas by the method used in rural areas. Samples of raw and maize to masa, and then it increased in tortillas. Fatty acid composition cooked maize and their respective tortillas were analyzed for major nutrient was similar among the maize samples and distribution was not affected components, as well as for total dietary fiber, calcium, magnesium, sodium, by the lime cooking process. Protein quality was significantly higher and potassium. Four of the common maize samples, the QPM, and their (P < 0.03) in tortillas than in raw maize. In this respect QPM as a processing products were analyzed for fatty acid content, and were also raw grain and as tortillas was statistically significantly superior to common evaluated for protein quality. For both common maize and QPM the maize.
A transistorized overvoltage relay (1956)

PERHAPS the most important single protective device in any aircraft electric system is the overvoltage relay. Overvoltage conditions cannot only cause serious damage to connected load equipment and to the power generation equipment, if not removed, but can cause the loss of the entire electric power system. Overvoltage relays are designed to have inverse time-voltage characteristics because most of the damage caused by overvoltage is because of overheating. To obtain overvoltage protection and still not get nuisance operations on normal system transients, the relay must operate very rapidly on extreme overvoltages and relatively slowly on slight overvoltages. Upon completion of the time delay the relay contacts close the trip coil of the generator control relay, thus de-energizing the faulty system.
A Prediction of Stirling Engine Performance : 1st Report, Simple Method (1985)

A single acting Stirling engine with two pistons is considered to consist of five parts of an expansion space, a heater, a regenerator, a cooler and a compression space. The performance of the engine is easily calculated under the assumptions that the temperatures in those spaces are kept constant at each level through any cycle and that the pressure in uniform in all the regions. Calculations have made clear that the optimum phase difference is about 120°, the optimum ratio of swept volume is about 0.85 and the volume of the cooler affects the engine performance more largely than the other heat exchange volumes.
Central nervous system neurons acquire mast cell products via transgranulation (2005)

Resting and actively degranulating mast cells are found on the brain side of the blood-brain barrier. In the periphery, exocytosis of mast cell granules results in the release of soluble mediators and insoluble granule remnants. These mast cell constituents are found in a variety of nearby cell types, acquired by fusion of granule and cellular membranes or by cellular capture of mast cell granule remnants. These phenomena have not been studied in the brain. In the current work, light and electron microscopic studies of the medial habenula of the dove brain revealed that mast cell-derived material can enter neurons in three ways: by direct fusion of the granule and plasma membranes (mast cell and neuron); by capture of insoluble granule remnants and, potentially, via receptor-mediated endocytosis of gonadotropin-releasing hormone, a soluble mediator derived from the mast cell. These processes result in differential subcellular localization of mast cell material in neurons, including free in the neuronal cytoplasm, membrane-bound in granule-like compartments or in association with small vesicles and the trans-Golgi network. Capture of granule remnants is the most frequently observed form of neuronal acquisition of mast cell products and correlates quantitatively with mast cells undergoing piecemeal degranulation. The present study indicates that mast cell-derived products can enter neurons, a process termed transgranulation, indicating a novel form of brain-immune system communication.