gebhart/patrepeval huggingface dataset:
Recovering structure and 3-D motion parameters of a rigid planar patch using moments (1991)

It is shown that a binocular observer can recover the 3-D structure and motion of a rigid planar patch. This is accomplished by combining motion and stereo to obtain linear equations in the unknowns, which yield unique solutions. The approach is based on the aggregate stereo method and on the general theory of moments. The computation of a limited set of moments of four images is required. The images of the rigid planar patch involved are two before and two after the motion. Real-time application of the approach is possible, since image moments can be computed in real time (frame rates). Knowledge of point-to-point correspondences between the different images is not required. The approach presented solves the problem of motion estimation by looking at the object as an array of 3-D points. It is assumed that there is only one object in the image and that the object is undergoing rigid motion.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Repercusiones fiscales del sector informal en San Martin Texmelucan, Puebla / Tax implications of the informal sector in San Martin Texmelucan, Puebla (2015)

El presente trabajo da a conocer los resultados del estudio realizado en la ciudad de San Martin Texmelucan, Puebla para determinar el impacto en la recaudación fiscal de la economía informal, tomando en cuenta las cifras de INEGI 2010 y el reporte oficial de la Secretaria de Finanzas con respecto a la base de contribuyentes inscritos en los regímenes de: pequeños contribuyentes e Intermedio de las personas físicas con actividades empresariales. En la realización de este estudio se aplicó una encuesta trescientos setenta y siete comerciantes ambulantes del centro de la ciudad, para determinar los ingresos aproximados que generan sus actividades y calcular los impuestos que deberían enterar a la autoridad fiscal si este sector económico estuviera dentro del marco legal tributario vigente que le corresponde.
Stereoselective Synthesis of 1,2‐Diamino‐1,2‐diarylethane Derivatives. (2005)

Abstract For Abstract see ChemInform Abstract in Full Text.
Rethinking the design of virtual machine monitors (2005)

A virtual machine monitor is a software system that partitions a single physical machine into multiple virtual machines. Traditionally, VMMs have created a precise replica of the underlying physical machine. Through faithful emulation, VMMs support the execution of legacy guest operating systems such as Windows or Linux without modifications. However, traditional VMMs suffer from poor scalability and extensibility. To overcome the poor scalability and extensibility of traditional virtual machine monitors that partition a single physical machine into multiple virtual machines, the Denali VMM uses paravirtualization to promote scalability and hardware interposition to promote extensibility.
Conductive conformal thin film coatings for textured PV: ALD versus sputtering (2011)

Next-generation photovoltaic structures require well-established deposition routes to conformal and conducting materials with defined chemical, physical and electronic composition. This work reports on the preliminary findings associated with conformal metal oxides on structured substrates including: 1) Discovery of sputtering process conditions that can be made semi-conformal when combined with in-situ techniques such as ion-beam milling for honing surface structures; 2) Development of relevant ALD chemistries that are materials-properties competitive with sputtered materials; 3) Evaluation of chemically-functionalized surface structures that maximize surface area but are structurally tailored for efficient gas flow and to minimize line-of-sight shadowing. The initial experiments have centered on combinations of amorphous and crystalline indium oxide, zinc oxide, aluminum zinc oxide, indium tin oxide, fluorinated tin oxide and indium zinc oxide. This presentation will describe these initial experiments and elucidate key physiochemical nature of the deposited thin films.
Experimental Validation of Energy Harvesting-System Availability Improvement Through Battery Heating (2017)

Operation of wireless sensor nodes or battery powered embedded systems in cold and harsh environments requires careful battery selection and management. In this paper, we first provide a general model of an energy harvesting sensor system and the respective energy flows. We then present a maximum power point tracking solar harvesting system according to that model. The system is coupled with rechargeable Li-ion batteries and equipped with a battery heating mechanism. The significant signals of that system are monitored to have a deeper insight into the energy distribution. Real-world experiments demonstrate benefits of battery heating during high irradiation periods at temperatures below safe charging conditions. The presented case study for a cold winter day shows that the additional energy, which can be stored thanks to battery heating would more than double the autonomy of the sensor system.
Ion beam extraction from a plasma with aberration reduction by method of mutual exclusion (1981)

Using an algorithm for solution of the Poisson-Vlasov equations for ions extracted from a plasma, an electrode shape is considered which has high optimum perveance and low beam divergence.
Neurological Principles and Rehabilitation of Action Disorders (2011)

In this chapter, the authors use the computation, anatomy, and physiology (CAP) principles to consider the impact of common clinical problems on action. They focus on 3 major syndromes: paresis, apraxia, and ataxia. They also review mechanisms that could account for spontaneous recovery, using what is known about the best-studied clinical dysfunction--paresis--and also ataxia. Together, this and the previous chapter lay the groundwork for the third chapter in this series, which reviews the relevant rehabilitative interventions.
Influence of Breed, Sex, Age and Electrical Stimulation on Carcass and Palatability Traits of Three Bovine Muscles1 (1984)

Sixty bulls and sixty steers representing four breeds (Charolais, Simmental, Hereford and Angus) were assigned randomly, within breeds, to one of three slaughter age end points (12, 15 or 18 mo). The right side from each carcass was electrically stimulated (ES) within 1 h postmortem. The longissimus (LD), semimembranosus (SM), infraspinatus (IS) and biceps femoris (BF) muscles were removed at 7 d postmortem for sensory and shear analysis. Breed had few significant or practical effects on palatability traits. In contrast to previously reported results, bulls and steers at 12 mo of age were generally less tender than those slaughtered at 18 mo. Total cooking losses were less from bulls except in the 18 mo slaughter group. Bulls were rated more tender than steers at 15 mo but the trend was reversed at 18 mo. Electrical stimulation improved ratings for heat ring (two-toning), lean color and lean firmness. These effects were greater in the 12 mo slaughter age group and greater for steers.
Synthesis of 1-Alkenyl Alkyl Ethers (1958)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of 1-Alkenyl Alkyl EthersJ. L. E. ERICKSON and M. Z. WOSKOWCite this: J. Org. Chem. 1958, 23, 5, 670–672Publication Date (Print):May 1, 1958Publication History Published online1 May 2002Published inissue 1 May 1958https://pubs.acs.org/doi/10.1021/jo01099a007https://doi.org/10.1021/jo01099a007research-articleACS PublicationsRequest reuse permissionsArticle Views294Altmetric-Citations10LEARN 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
SIMBA for Students: teaching preclinical medical and pharmacy students endocrinology through online simulation - a pilot study (2022)

Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | ISSN 1479-6848 (online)
Designer hydrogels: Shedding light on the physical chemistry of the pancreatic cancer microenvironment (2018)

Pancreatic ductal adenocarcinoma (PDAC) is currently the third leading cause of cancer mortality in the United States, with a 5-year survival of ∼8%. PDAC is characterized by a dense and hypo-vascularized stroma consisting of proliferating cancer cells, cancer-associated fibroblasts, macrophages and immune cells, as well as excess matrices including collagens, fibronectin, and hyaluronic acid. In addition, PDAC has increased interstitial pressures and a hypoxic/acidic tumor microenvironment (TME) that impedes drug delivery and blocks cancer-directed immune mechanisms. In spite of increasing options in targeted therapy, PDAC has mostly remained treatment recalcitrant. Owing to its critical roles on governing PDAC progression and treatment outcome, TME and its interplay with the cancer cells are increasingly studied. In particular, three-dimensional (3D) hydrogels derived from or inspired by components in the TME are progressively developed. When properly designed, these hydrogels (e.g., Matrigel, collagen gel, hyaluronic acid-based, and semi-synthetic hydrogels) can provide pathophysiologically relevant compositions, conditions, and contexts for supporting PDAC cell fate processes. This review summarizes recent efforts in using 3D hydrogels for fundamental studies on cell-matrix or cell-cell interactions in PDAC.
Maintaining a Healthy Equity Structure: A Policy Change at Producers Cooperative Association (2010)

Within its sales territory, Producers Cooperative Association of Bryan, Texas is a dominant feed, fertilizer, and farm supply business. This case study enables students to understand the operating philosophies of this cooperative as it faces over twenty-one different major competitors. The case is designed to give students an understanding of the equity financing of a cooperative; a greater appreciation for creating member value within a cooperative; and an illustration of a successful board decision-making process. This case is intended for use in junior or senior level cooperative management or strategic management classes. Alternatively, the case can also be used in board of director and/or manager training. A separate teaching note explains the authors’ desired case learning outcomes and also answers student questions.
General Considerations In Attempting To Characterize Non-uniform, Non-planar Electromagnetic Field Environments (2005)

Power density and electric field strength are often used almost interchangeably to describe t he intensity of an electromagnetic environment. However, the simple relationship (PD=E /377) between them is invalidated if the field is non-uniform and non-planar. Consequently, a more complex definition of power density is required. This paper discusses expanded definitions of power density in terms of rms electric and/or magnetic field strengths. Measurements of electric and magnetic fields demonstrating the relationships of these various definitions and their range of applicability and usefulness are presented and discussed. Recommendations concerning the acceptance of these proposed definitions in electromagnetic hazards work are proferred. 2
Mechanisms of myocardium-coronary vessel interaction (2009)

The mechanisms by which the contracting myocardium exerts extravascular forces (intramyocardial pressure, IMP) on coronary blood vessels and by which it affects the coronary flow remain incompletely understood. Several myocardium-vessel interaction (MVI) mechanisms have been proposed, but none can account for all the major flow features. In the present study, we hypothesized that only a specific combination of MVI mechanisms can account for all observed coronary flow features. Three basic interaction mechanisms (time-varying elasticity, myocardial shortening-induced intracellular pressure, and ventricular cavity-induced extracellular pressure) and their combinations were analyzed based on physical principles (conservation of mass and force equilibrium) in a realistic data-based vascular network. Mechanical properties of both vessel wall and myocardium were coupled through stress analysis to simulate the response of vessels to internal blood pressure and external (myocardial) mechanical loading. Predictions of transmural dynamic vascular pressure, diameter, and flow velocity were determined under each MVI mechanism and compared with reported data. The results show that none of the three basic mechanisms alone can account for the measured data. Only the combined effect of the cavity-induced extracellular pressure and the shortening-induced intramyocyte pressure provides good agreement with the majority of measurements. These findings have important implications for elucidating the physical basis of IMP and for understanding coronary phasic flow and coronary artery and microcirculatory disease.
The thermal energy dependence (10–20 eV) of electron impact induced fragmentation of C60 in molecular beams: Experiment and model calculations (1995)

We have studied the dependence of electron impact induced ionization and fragmentation of C60 molecules in effusive molecular beams upon the initial thermal excitation in the temperature range of 1190–1875 K, corresponding to an average vibrational energy of 10–20 eV. This is the largest energy range of parent molecule thermal excitation ever reported for electron-impact mass-spectrometric studies. The normalized curves of electron energy (Ee) dependent ion currents of C+60 and C+58 were measured and analyzed for the temperatures (T0) of 1190, 1435, 1570, 1695, and 1875 K. Similar measurements were done for C+2n (n=26–28) fragments for T0=1190 and 1875 K. We have developed an expression for the dependence of C+58 fragment ion current i58(Ee,T0), formed via the decay process C+60→C+58+C2, on electron energy and initial temperature. Using this expression and the strong temperature dependence observed, we have proposed a simple experimental method for estimating the energy deposition function—the probability density of vibrational excitation ε by an ionizing electron of energy Ee. The effective (apparent) value of maximum deposited energy was found to be εm(Ee)=Ee−E*, where E*=30±5 eV. Possible interpretations for this surprisingly low value are discussed. Comparing the experimental i58(Ee,T0) curves with the calculated ones over the range of Ee=30–80 eV we find that for T0≤1600 K, good agreement is obtained assuming that the C60 initial internal excitation is determined by the source temperature alone. For the higher temperature range 1600 K≤T0≤1900 K, we had to use a modified calculation taking into account radiative cooling and ensemble evaporative cooling processes along the molecular beam flight path. As a result, we have obtained an accurate simulation of the complete family of i58(Ee,T0) curves over all the temperature range measured, using a single set of independently measured physical quantities, and without any adjustable parameter. Uniqueness and sensitivity were thoroughly checked and demonstrated. The good agreement between experiment and calculation basically confirms our description of the underlying process and provides an additional support for the values of the independent physical parameters used. We have used maximum energy deposition parameter of E*=31 eV, an activation energy of E0=4.3–4.5 eV for the neutral fragmentation channel C60→C58+C2 and E1=4.0 eV for the ion fragmentation channel C+60→C+58+C2, and pre-exponential factors of A0=A1=2.5×1013 s−1. These values are very close to former ones obtained by us from analysis of time-of-flight distributions and integrated flux decay measurements of hot C60 molecular beams. Correspondence with other results reported in the literature is discussed and a two-step dissociation mechanism is proposed.
Avian influenza surveillance in Central and West Africa, 2010–2014 (2014)

Avian influenza virus (AIV) is an important zoonotic pathogen, resulting in global human morbidity and mortality and substantial economic losses to the poultry industry. Poultry and wild birds have transmitted AIV to humans, most frequently subtypes H5 and H7, but also different strains and subtypes of H6, H9, and H10. Determining which birds are AIV reservoirs can help identify human populations that have a high risk of infection with these viruses due to occupational or recreational exposure to the reservoir species. To assess the prevalence of AIV in tropical birds, from 2010 to 2014, we sampled 40 099 birds at 32 sites in Central Africa (Cameroon, Central African Republic, Congo-Brazzaville, Gabon) and West Africa (Benin, Côte d'Ivoire, Togo). In Central Africa, detection rates by real-time RT-PCR were 16·6% in songbirds (eight passerine families, n = 1257), 16·4% in kingfishers (family Alcedinidae, n = 73), 8·2% in ducks (family Anatidae, n = 564), and 3·65% in chickens (family Phasianidae, n = 1042). Public health authorities should educate human cohorts that have high exposure to these bird populations about AIV and assess their adherence to biosecurity practices, including Cameroonian farmers who raise small backyard flocks.
Pulse characteristics of a passively mode-locked thulium fiber laser with positive and negative cavity dispersion (2010)

We investigated of the output characteristics of a spectrally filtered stretched-pulse thulium fiber laser in dependence of cavity dispersion and pump power. The experimental results together with corresponding theoretical modeling allow for a deeper insight into the pulse shaping mechanisms.
Curb Detection Based on a Multi-Frame Persistence Map for Urban Driving Scenarios (2008)

An approach for the detection of straight and curved curbs (border of relevant traffic isles, sidewalks, etc) is presented, in the context of urban driving assistance systems. A rectangular elevation map is built from 3D dense stereo data. Edge detection is applied to the elevation map in order to highlight height variations. We propose a method to reduce significantly the 3D noise from dense stereo, using a multiframe persistence me persistence map: temporal filtering is performed for edge points, based on the ego car motion, and only persistent points are validated. The Hough accumulator for lines is built with the persistent edge points. A scheme for extracting straight curbs (as curb segments) and curved curbs (as chains of curb segments) is proposed. Each curb segment is refined using a RANSAC approach to fit optimally the 3D data of the curb. The algorithm was evaluated in an urban scenario. It works in real-time and provides robust detection of curbs.
A structured and model-based hazard analysis and risk assessment method for automotive systems (2013)

The released ISO 26262 standard requires a hazard analysis and risk assessment for automotive systems to determine the necessary safety measures to be implemented for a certain feature. In this paper, we present a structured and model-based hazard analysis and risk assessment method for automotive systems. The hazard analysis and risk assessment are based on a requirements engineering process using problem frames. Their elements are represented by a UML notation extended with stereotypes. The UML model enables a rigorous validation of several constraints expressed in OCL. We illustrate our method using an electronic steering column lock system.
Predictive medicinal metabolites fromMomordica dioicaagainst comorbidity related proteins of SARS-CoV-2 infections (2021)

<i>Momordica dioica</i> have proven medicinal potential of antidiabetic, antiviral and immune stimulating properties. Flavonoids and triterpenoids from <i>M. dioica</i> were more extensively investigated for antiviral, antidiabetic and immunomodulatory activities. In this present study, we have predicted the reported bioactive flavonoids and triterpenoids of the plant against the SARS-CoV-2 main protease, RNA-dependent RNA polymerase (RdRp), spike protein, angiotensin converting enzyme (ACE-2) receptor and dipeptidyl peptidase (DPP4) receptor through molecular docking and <i>in silico</i> ADME predictions methods. According to the binding affinities, the two triterpenoids, hederagenin and oleanolic acid exhibited the best docking scores with these proteins than the catechin and quercetin with compared to standard remdesivir, favipiravir and hydroxychloroquine. The <i>in vitro</i> protein-drug studies have also showed significant interaction of catechin and quercetin compounds than standard drugs. The <i>in silico</i> binding studies correlated with the <i>in silico</i> binding studies. Further, <i>M. dioica</i> being used as antidiabetic and its metabolite had significant interaction with DDP4, a comorbidity protein involved in aiding the viral entry. Out of all the natural ligands, quercetin was reported relatively good and safe for humans with high gastrointestinal tract permeability and poor blood brain barrier crossing abilities. Hence, <i>M. dioica</i> phytocompounds reflects promising therapeutic properties against SARS-CoV-2 infections under comorbid conditions such as diabetes, cardiovascular disease and kidney disorders.Communicated by Ramaswamy H. Sarma.
Supernatant cell counts from long-term bone marrow culture correlate with the speed of engraftment following autologous bone marrow transplantation. (1991)

This study evaluates the relationship between bone marrow growth in a long-term bone marrow culture (LTBMC) system and speed of engraftment of the same marrow following autologous bone marrow transplantation (ABMT). Bone marrow from 21 patients transplanted with unmanipulated, non-cryopreserved autologous marrow was cultured. Samples from 21 normal donors were cultured to establish the normal supernatant cell count range. Supernatant counts from LTBMCs established from marrow taken from patients at the time of bone marrow harvest were compared with the time to neutrophil and platelet engraftment. Supernatant counts, particularly after 1 week in culture, showed close correlation with time to neutrophil and platelet engraftment following ABMT (r = 0.733, p less than 0.01; r = 0.735, p less than 0.01 respectively). Where supernatant cell counts were within the normal range rapid engraftment was predicted (neutrophils greater than 0.5 x 10(9)/l within 21 days, platelets greater than 50 x 10(9)/l within 28 days) and if supernatant counts were below this range, engraftment was predicted to be delayed. After 1 week in culture, the speed of neutrophil and platelet engraftment were correctly predicted in 19 and 18 cases respectively. Preliminary data suggest that LTBMC of marrow obtained 2-6 weeks before harvesting provides similar data, thus allowing the opportunity to intervene, for example with growth factors, in selected patients.
Surfactant-free synthesis of hollow mesoporous organosilica nanoparticles with controllable particle sizes and diversified organic moieties (2016)

The versatility of the surfactant-free synthesis of hollow organosilica nanoparticles was shown in terms of particle diameters and organic moieties. The porous structures were investigated precisely by advanced adsorption–desorption measurements.