gebhart/patrepeval huggingface dataset:
A novel pressure array sensor based on contact resistance variation: Metrological properties (2001)

The working principle and the metrological performances of a novel array sensor devoted to pressure map measurements are experimentally analyzed here. The physical principle on which the sensor elements are sensitive to the pressure is the variation of the contact resistance. Pressure maps from 1 up to 500 kPa can be measured. The prototype here utilized for the metrological characterization has been an 8×8 matrix sensor with a 5 mm spatial resolution over both x and y direction and a total thickness of 150 μm. The materials that have been chosen to assemble the prototype yielded to a very flexible and robust sensor which can easily be fitted over round surfaces without being damaged or leading to an alteration of its measuring properties. The static and the dynamic metrological performances of the sensor that have been studied and discussed are the response function and the calibration curve, the repeatability, the sensitivity, the time drift, the hysteresis, and the dynamic response. In spite of its functional and constructive simplicity, the metrological performances the sensor has exhibited, together with its peculiar constructive feature, have indicated the possibility to utilize it to effectively measure pressure maps in every application for which the sensor could be shaped in.
Neural Systems for Error Monitoring (2007)

Complex behavior requires a flexible system that maintains task performance in the context of specific goals, evaluating behavioral progress, adjusting behavior as needed, and adapting to changing contingencies. Generically referred to as performance monitoring, a key component concerns the identification and correction of differences between an intended and an executed response (i.e., an error). Brain mapping experiments have now identified the temporal and spatial components of a putative error-processing system in the large-scale networks of the human brain. Most of this work has focused on the medial frontal cortex and an associated electrophysiological component known as the error-related negativity (or error negativity). Although the precise role, or roles, of this region still remain unknown, investigations of error processing have identified a cluster of modules in the medial frontal cortex involved in monitoring/maintaining ongoing behavior and motivating task sets. Other regions include bilateral anterior insula/inferior operculum and lateral prefrontal cortex. Recent work has begun to uncover how individual differences might affect the modules recruited for a task, in addition to the identification of associations between pathological states and aberrant error signals, leading to insights about possible mechanisms of neuropsychiatric illness.
Varietal differences in albumin and globulin fractions of <i>Triticum aestivum</i> and <i>T. durum</i> (1969)

Abstract Albumin and globulin fractions of several varieties of Triticum aestivum and T. durum were analysed by disc‐electrophoresis on polyacrylamide gel. With this procedure 14 albumin and 15 globulin bands were obtained. After aniline blue‐black staining, all albumin bands were coloured blue‐black, whereas the globulins were green. Varietal differences were found mostly in the fast‐moving albumin electrophoretic bands.
Prevention and Treatment of Virulent Bacterial Biofilms with an Enzymatic Nitric Oxide-Releasing Dressing (2012)

The use of percutaneous medical devices often results in nosocomial infections. Attachment of microorganisms to the surfaces of these medical devices triggers biofilm formation, which presents significant complications to the health of a patient and may lead to septicemia, thromboembolism, or endocarditis if not correctly treated. Although several antimicrobials are commonly used for prevention of biofilm formation, they have limited efficacy against formed biofilms. In this study, we report the use of an enzymatic, gaseous nitric oxide (gNO)-releasing dressing for the prevention and treatment of Acinetobacter baumannii, methicillin-resistant Staphylococcus aureus, and Pseudomonas aeruginosa biofilms. Results show that the bactericidal activity against biofilms of the test strains was dependent on time and rate of gNO release from the dressing. Following 6 h of treatment, gNO-releasing dressings significantly inhibited the growth of test strains relative to vehicle control dressings, demonstrating eradication of bacterial concentrations of up to 10(5) CFU/cm(2). Complete cell death was observed for both prevention of biofilm formation and treatment of 24-h-grown biofilms after 6 h of treatment with the gNO-releasing dressings. Further, gNO-releasing dressings were more efficient against formed biofilms than other antimicrobial agents currently used. These results demonstrate that the gNO-releasing dressing can produce sufficient levels of gNO over a therapeutically relevant duration for maximal bactericidal effects against virulent bacterial strains known to cause nosocomial infections.
Optical investigations on isovalent δ layers in III-V semiconductor compounds (1995)

In contrast to usual quantum wells or barriers having a thickness of some lattice constants, spatially well-separated, electronically uncoupled monolayers of group-III or V elements are considered as isovalent δ doping or δ layers. Similar to the case of randomly distributed nitrogen dopants in GaP bulk material, it is shown that the two-dimensional arrangement of isovalent atoms brings forth a new quality of III-V semiconductor compounds: The optical emission and absorption properties near the fundamental band gap of indirect-gap, and even of direct-gap, host material, where the isovalent layers are incorporated, are drastically improved. Low-temperature luminescence and transmission experiments on metal-organic vapor-phase epitaxially grown InAs δ layers in GaAs, AlAs δ layers in GaAs, and GaAs monolayers in AlAs are dealt with.
Preparation and Properties of Some Allylic Peroxides (1951)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Properties of Some Allylic PeroxidesTod W. Campbell and Galvin M. CoppingerCite this: J. Am. Chem. Soc. 1951, 73, 4, 1788–1789Publication Date (Print):April 1, 1951Publication History Published online1 May 2002Published inissue 1 April 1951https://pubs.acs.org/doi/10.1021/ja01148a108https://doi.org/10.1021/ja01148a108research-articleACS PublicationsRequest reuse permissionsArticle Views135Altmetric-Citations15LEARN 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
Design of three-dimensional domain-swapped dimers and fibrous oligomers (2001)

Three-dimensional (3D) domain-swapped proteins are intermolecularly folded analogs of monomeric proteins; both are stabilized by the identical interactions, but the individual domains interact intramolecularly in monomeric proteins, whereas they form intermolecular interactions in 3D domain-swapped structures. The structures and conditions of formation of several domain-swapped dimers and trimers are known, but the formation of higher order 3D domain-swapped oligomers has been less thoroughly studied. Here we contrast the structural consequences of domain swapping from two designed three-helix bundles: one with an up-down-up topology, and the other with an up-down-down topology. The up-down-up topology gives rise to a domain-swapped dimer whose structure has been determined to 1.5 A resolution by x-ray crystallography. In contrast, the domain-swapped protein with an up-down-down topology forms fibrils as shown by electron microscopy and dynamic light scattering. This demonstrates that design principles can predict the oligomeric state of 3D domain-swapped molecules, which should aid in the design of domain-swapped proteins and biomaterials.
La ampliación de la UE (1994)

Post-mortem concentrations of progesterone, 5alpha-pregnane-3,20-dione (5alpha-DHP) and 3alpha-hydroxy-5alpha-pregnane-20-one (allopregnanolone) were measured in 17 brain areas and serum in five fertile and five postmenopausal women. Steroid concentrations were measured with radioimmunoassay after extraction of brain tissue with ethanol and purification with celite chromatography. There were regional differences in brain concentrations of all three steroids. The highest progesterone levels were noted in the amygdala, cerebellum and hypothalamus and the highest levels of 5alpha-DHP and allopregnanolone were seen in the substantia nigra and basal hypothalamus. Brain concentrations of all three steroids were significantly higher in the fertile women in luteal phase compared to their postmenopausal controls (P < 0.01). In general, the study showed that there is a variation in brain concentrations depending on ovarian steroid production, indicating that the secretion pattern during the menstrual cycle is reflected in the brain. However, regional differences in brain steroid levels imply local mechanisms for steroid uptake and binding as well. Investigations of gonadal steroid distributions in the human brain might be of importance considering the actions of these steroids in the central nervous system. Such studies could provide information about physiological mechanisms, such as the ovulation, and also form a baseline for comparative studies of normal and pathological conditions involving steroids, for instance, catamenial epilepsy and the premenstrual tension syndrome.
Coordination variability and skill development in expert triple jumpers (2008)

The aim of this study was to examine the influence of skill of expert triple jumpers on the coordination variability of lower extremity intra-limb couplings. In contrast to the traditional motor learning perspective, we hypothesized that as skill and thus performance increases, movement coordination variability will also increase. Three-dimensional kinematic and ground reaction force data were collected during the hop-step transition phase of the triple jump. Relative motion plots and a modified vector coding technique were used to quantify the coordination variability across the trials. The results were consistent with a U-shaped curve, representing coordination variability, as skill increases. The high coordination variability in less skilled athletes is present while the appropriate characteristics defining the movement coordination patterns are acquired. This coordination variability may not be beneficial to performance. As the refinement of these characteristics is achieved, coordination variability decreases, resulting in a more consistent or regulated performance. In the final stages of developing a skilled performance, a functional variability is accessed that brings flexibility to the system allowing it to cope with perturbations. This study highlights the need to address the learning effect when analysing coordination variability from a dynamical systems perspective.
Identification and Dynamics of Two Classes of Aurora-Like Kinases in Arabidopsis and Other Plants (2005)

Aurora-like kinases play key roles in chromosome segregation and cytokinesis in yeast, plant, and animal systems. Here, we characterize three Arabidopsis thaliana protein kinases, designated AtAurora1, AtAurora2, and AtAurora3, which share high amino acid identities with the Ser/Thr kinase domain of yeast Ipl1 and animal Auroras. Structure and expression of AtAurora1 and AtAurora2 suggest that these genes arose by a recent gene duplication, whereas the diversification of plant alpha and beta Aurora kinases predates the origin of land plants. The transcripts and proteins of all three kinases are most abundant in tissues containing dividing cells. Intracellular localization of green fluorescent protein-tagged AtAuroras revealed an AtAurora-type specific association mainly with dynamic mitotic structures, such as microtubule spindles and centromeres, and with the emerging cell plate of dividing tobacco (Nicotiana tabacum) BY-2 cells. Immunolabeling using AtAurora antibodies yielded specific signals at the centromeres that are coincident with histone H3 that is phosphorylated at Ser position10 during mitosis. An in vitro kinase assay demonstrated that AtAurora1 preferentially phosphorylates histone H3 at Ser 10 but not at Ser 28 or Thr 3, 11, and 32. The phylogenetic analysis of available Aurora sequences from different eukaryotic origins suggests that, although a plant Aurora gene has been duplicated early in the evolution of plants, the paralogs nevertheless maintained a role in cell cycle-related signal transduction pathways.
A New Dialyzer for Use as an Artificial Kidney (1951)

An efficient and safe dialyzer suitable for continuous operation under sterile conditions is described. It is made up of a variable number of component channels according to surface area desired. Sterility is accomplished by autoclaving as a whole and optional controlled ultrafiltration is possible.
HOXB13, a Target of DNMT3B, Is Methylated at an Upstream CpG Island, and Functions as a Tumor Suppressor in Primary Colorectal Tumors (2010)

This is the first report that identifies several important tumor suppressors and transcription factors as direct DNMT3B targets in colon cancer and as potential biomarkers for this cancer. Further, this study shows that methylation at an upstream CGI of HOXB13 is unique to colon cancer.
A hand-held 3D display system that facilitates direct manipulation of 3D virtual objects (2009)

Digital 3D media has become more and more popular in recent years because of the availability of various 3D displaying devices. However, such 3D displaying devices are either limited in display size, mobility and weight. They can be extremely expensive too. In this paper, we proposed a movable 3D display system which uses a projector to project 3D display content onto an ordinary cardboard without any special patterns printed on it or any special sensors attached to it. The 3D perception is created by motion parallax. That means the user can observe different views of the virtual 3D object by adjusting the orientation of the projected cardboard. Such a system can give users greater freedom of control such as the viewing angle and distance, so the user can directly manipulate the virtual objects without using other indirect pointing devices such as a mouse. At the same time, the size of the cardboard can be made to a size that fits one's application. In our system, a projector-camera pair is calibrated and used as the tracking and projection system. We use a vision based algorithm to detect and track the display subsequent motion. Display content is then transformed, pre-warped and projected onto the cardboard. Experimental results show that our system can allow the user to view and directly manipulate a 3D virtual object on a movable cardboard by using motion parallax.
Wildlife and Domestic Animal-Vehicle Collisions in Utah (2006)

The Utah Department of Transportation Wildlife Quality Improvement Team found domestic animal-vehicle collisions to be as significant as wildlife animal-vehicle collisions and recommended the development of this toolkit. A list of “Hot Spots” for Utah domestic and wildlife animal-vehicle collisions are included as well as GIS maps indicating these areas. The objective of this toolkit is to contain a summary of mitigation measures used in Utah, other states, North America and abroad regarding animal-vehicle collisions that can be used consistently throughout the Department regardless of the current phase of a project (Long Range Planning, Concept, Scoping, Preconstruction, Construction, Maintenance, etc.) to reduce the number of animal-vehicle collisions. This toolkit is to be updated as needed to reflect current practices.
Oscillometric Blood Pressure Measurements by Different Devices Are Not Interchangeable (1996)

Blood pressure (BP) is frequently measured in patients by noninvasive blood pressure (NIBP) monitors.Values obtained by oscillometric devices of different brands may appear in one patient's record as if they were interchangeable; their concordance, however, has not been established. In 25 patients with major depression who were treated with electroconvulsive therapy (ECT) BP was measured on either arm by devices manufactured by SpaceLabs (SpL, 12 patients, 182 data points) and Marquette (Marq, 13 patients, 193 data points), respectively, and comparisons were made with simultaneous measurements on the opposite arm by Dinamap 1846SX (DIN), during the awake state and at 1-min intervals up to 5-7 min after ECT. Because ECT is associated with an intense, but short-lasting hyperdynamic state, comparisons of BP values could be made over a wide range of pressures. Bland-Altman plots were constructed to show the distribution of pressure differences at all pressures. Agreements between two instruments were judged according to guide lines by the American Association for Advancement of Medical Instrumentation (AAMI). The standard deviation of the difference (SDD) between two DIN devices was 7 mm Hg for systolic (SBP) and 6.3 mm Hg for diastolic blood pressure (DBP), whereas mean differences were 0.9 and 0.2 mm Hg, respectively (P = not significant [NS]), thus showing reproducibility. Corresponding SDD values SpL versus DIN were 9.1 for SBP and 8.3 mm Hg for DBP, while the mean differences were 1.6 (P = 0.026) and 7.3 (P = 0.0001) mm Hg, respectively. Corresponding SDD values for Marq versus DIN were 11.8 and 9.7 mm Hg with mean differences of 0.8 (P = NS) and 0.3 (P = NS) mm Hg. Whereas SBP differences DIN versus DIN exceeded 10 mm Hg in only 10% of observations, they exceeded that threshold in 31% and 32% of observations for SpL versus DIN and Marq versus DIN, respectively. In view of the variability that exceeds the AAMI guidelines and the one out of three occurrence of individual SBP differences exceeding 10 mm Hg for comparisons of SpL or Marq versus DIN, measurements by these three oscillometric devices are not interchangeable. (Anesth Analg 1996;82:377-81)
Synthesis of repetitive control systems and its application (1985)

A new control scheme named repetitive control is proposed, in which the controlled variables follow the periodic reference commands with high accuracy. The error convergence condition for linear plants is derived by applying the small gain theorem and a synthesis algorithm using the methods of Kalman Filter and the perfect regulation is presented. We also investigate the repetitive control for a class of nonlinear systems described by x(t)=Ax(t)+Bu(t)+f(x(t)) and y(t)=Cx(t)+Du(t). The stability condition is developed using the passivity theorem. The scheme is applied to the trajectory control for a three-link manipulator.
A Miniature High-Q Bandpass Filter Employing Dielectric Resonators (1968)

The miniaturization of high-Q resonant microwave structures is of great importance. This must he done to keep pace with the size reduction of other related components. The need has led to an investigation into the feasibility of using dielectric materials as microwave resonators. This paper deals with the application of the TiO/sub 2/ dielectric resonator in a narrowband bandpass filter operating in the 2200 to 2300 MHz telemetry band. The study confirms the theory that a bandpass filter employing dielectric resonators is practical to build, is compact, and will approach the performance of an equivalent waveguide filter. The design employed five resonators mounted in a cylindrical tube that was 1.4 inches in diameter by 4.3 inches long and weighed 4.6 ounces. An equivalent waveguide filter would be approximately 2.3x4.5x16 inches long and would weigh approximately 64 ounces (WR-430). The thermal sensitivity of the dielectric resonator employing TiO/sub 2/ is an inherent problem and oven regulation for narrowband applications will be required. Small, inexpensive thermal jackets are available that will control the filter stability to a value equal to, or better than, that obtained with a filter utilizing aluminum cavities operating in a typical uncontrolled temperature environment.
Analogue IC design using switched-currents (1990)

Most IC signal processors employ digital techniques with an analogue interface to the outside world. Frequently, the analogue interface employs switched-capacitor circuits performing A-D or D-A conversion, sample and hold, filtering etc. Unfortunately, switched-capacitors have never been compatible with VLSI processing as they invariably employ special processing options to make linear capacitors. As IC processing shrinks into the sub-micron region necessitating lower supply voltage working, switched-capacitors will suffer performance degradation. To overcome these problems 'switched-currents' were introduced about one year ago. Since then, the technique has undergone a number of developments. These include re-definition of the integrator structure to improve component sensitivity, noise, speed and linearity. Differentiator structures have also been introduced. Either integrators or differentiators may be used as building blocks for implementing signal processors using design-automation techniques. The circuits have inherent high bandwidth since they do not employ operational amplifiers. The paper will describe these recent developments which make the switched-current technique a real contender to succeed switched-capacitors in future VLSI systems.<
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Preliminary Clinical Experience with the First Dual Chamber Pacemaker Defibrillator (1997)

The lack of specificity of VT detection is a significant shortcoming of current ICDs. In a French multicenter study, 18 patients underwent implantation of the Defender 9001 (ELA Medical), an ICD utilizing dual chamber pacing and arrhythmia detection. Over a mean follow-up period of 7.1 +/- 4.5 months, 176 tachycardia episodes recorded in the device memory were analyzed, and physician diagnosis was compared with that by the device. All 122 VT/VF episodes were correctly diagnosed, as were 51 of 53 supraventricular tachyarrhythmias. Two episodes of AF with rapid regular ventricular rates were treated as VT, and a third episode, treated as VT, could not be diagnosed with certainty. A dual chamber pacemaker defibrillator offers improved diagnostic specificity without loss of sensitivity, in addition to the hemodynamic benefit of dual chamber pacing.
Exploring Bis(cyclometalated) Ruthenium(II) Complexes as Active Catalyst Precursors: Room‐Temperature Alkene–Alkyne Coupling for 1,3‐Diene Synthesis (2014)

Described is the development of a new class of bis(cyclometalated) ruthenium(II) catalyst precursors for C-C coupling reactions between alkene and alkyne substrates. The complex [(cod)Ru(3-methallyl)2] reacts with benzophenone imine or benzophenone in a 1:2 ratio to form bis(cyclometalated) ruthenium(II) complexes (1). The imine-ligated complex 1 a promoted room-temperature coupling between acrylic esters and amides with internal alkynes to form 1,3-diene products. A proposed catalytic cycle involves C-C bond formation by oxidative cyclization, β-hydride elimination, and C-H bond reductive elimination. This Ru(II)/Ru(IV) pathway is consistent with the observed catalytic reactivity of 1 a for mild tail-to-tail methyl acrylate dimerization and for cyclobutene formation by [2+2] norbornene/alkyne cycloaddition.