gebhart/patrepeval huggingface dataset:
Titanium(IV) oxide photocatalysts with palladium (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTitanium(IV) oxide photocatalysts with palladiumJ. Papp, H. S. Shen, R. Kershaw, K. Dwight, and A. WoldCite this: Chem. Mater. 1993, 5, 3, 284–288Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1021/cm00027a009https://doi.org/10.1021/cm00027a009research-articleACS PublicationsRequest reuse permissionsArticle Views567Altmetric-Citations95LEARN 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
Comparisons of multiple photon coincidence imaging techniques (1990)

The authors compare analytically techniques for multiple-photon coincidence imaging in terms of spatial resolution, detector efficiency (or simply efficiency), and system sensitivity for a spherical water phantom (or simply sensitivity). One analysis consists of comparing photon-photon coincidence single-photon-emission computerized tomography (PP-SPECT) with the angularly unconstrained, electronically collimated triple-photon coincidence imaging technique (TPCIT). A second analysis compares positron-emission tomography using time-of-flight information (TOF-PET) with angularly constrained, electronically collimated TPCIT, The angularly unconstrained TPCIT has a similar spatial resolution, higher efficiency, and higher sensitivity when compared to PP-SPECT. The angularly constrained TPCIT has similar spatial resolution, lower efficiency, and lower sensitivity when compared to TOF-PET. However, the angularly constrained TPCIT can, for brain imaging, reduce the localization range of photon-emission sites along projection rays from about 20 cm to about 1 cm during data acquisition, while TOF-PET currently reduces the range to about 7 cm.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Pulse-Testing Response for Unequal Pulse and Shut-In Periods (includes associated papers 14253, 19365, 20792, 21608, 23476 and 23840 ) (1975)

Abstract A theoretical study was carried out to developthe general equations relating-time lags and responseamplitudes to the length of the pulse cycles andthe pulse ratios of these cycles for pulse testswith unequal pulse and shut-in times. Thesevariables were related to the reservoir parameters using appropriate dimensionless groups. Theequations were developed by using the unsteady-stateflow model of the line source for an infinite, homogeneous reservoir that contains a single-phase, slightly compressible fluid. A computer programwas written to calculate the values of The three corresponding time lags and the response amplitudesat given dimensionless cycle periods and pulseratios using these general equations. For different values of the pulse ratio rangingfrom a 0.1 to 0.9, the time lags and responseamplitudes were calculated for dimensionless cycleperiods ranging from 0.44 to 7.04. This range ofcycle period and pulse ratio covers all practicalranges over which pulse testing can be usedeffectively. Curves relating the dimensionless timelag to the dimensionless cycle period and thedimensionless response amplitude were constructed JOT each case. It was also found that both thedimensionless cycle period and the dimensionlessresponse amplitude can be represented as simple exponential junctions of the dimensionless timelag. The coefficients of these relations are functionsonly of the pulse ratio. Introduction Two wells are used to run a pulse test.These two wells are termed the pulsing well and theresponding well. A series of flow disturbances isgenerated at the pulsing well and the pressureresponse is recorded at the responding well.Usually, alternate periods of flow and shut in (or injection and shut in) are used to generate the flowdisturbances at the pulsing well. The pressureresponse is recorded using a highly sensitive differential pressure gauge. Pulse testing has received considerable attentionbecause of be advantages A has over theconventional interference tests. The pressureresponse from a pulse test can be easily detectedfrom unknown trends in reservoir pressure. Pulsetest values are more sensitive to between-wellformation properties; thus, a detailed reservoirdescription can be obtained from pulse testing. In all the work that has been reported on pulsetesting, it was assumed that the flow disturbancesat the pulsing well were generated by alternate periods of flow and shut in or injection and shut in.The pulsing period and shut-in period were alwaysequal. There bas been no study of pulse testing with unequal pulse and shut-in periods. Such a studymight have indicated whether other pulse ratioswill produce higher response amplitudes than theequal-period tests. The main purpose of this studyis to determine the response of pulse testing tounequal pulse and shut-in periods and to find theoptimum pulse ratio that gives the maximum responseamplitude. PULSE-TEST TERMINOLOGY Fig. 1 shows the pulse-test terminology as usedin this paper. SPEJ P. 399^
Sponsored Visits (1980)

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On the design of pre-equalized square-root raised cosine matched filters for DSP based digital receivers (2002)

A matched filter implemented in a DSP based modem is followed or preceded by additional analog filtering. The non-uniform gain and phase of these analog filters cause filter mismatch and leads to undesired intersymbol interference. This paper describes a technique to design digital matched filters which includes the spectral gain and phase compensation required to equalize the known characteristics of the analog filters in the transmitter and receiver paths.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A miniature mobile parts feeder: operating principles and simulation results (2003)

A miniature mobile vibratory parts feeder is proposed. This feeder, exploiting the unique capabilities of a closed-loop planar linear motor, is designed to reorient, separate, and position parts using only horizontal vibrations. The actuators used for generating the feed vibrations are also capable of large planar motions, allowing the feeder to serve multiple overhead robots. This feeder is designed with a minimum of critical physical dimensions, allowing different parts to be fed with only software changes. The basic feed principle is presented, followed by experimental verification. Although a prototype has not yet been fabricated, a model for the motion of parts on the complete feeder is derived and simulation results are presented.
Experiments with Love waves on layered glass (2002)

Love waves are horizontally polarized shear waves (SH waves) guided along a surface by a low-velocity layer which covers a higher velocity substrate. In our experiments this low-velocity layer is a thin sheet of glass bonded to a very thin (32 micron) polymer film. The film in turn is bonded to a much thicker soda-lime glass base plate. We are using two transducers which can be moved freely about the glass surface, to vary the distance between them or to check the glass for uniformity. In these transducers, longitudinal waves at 5.6 MHz are first converted to bulk shear waves by reflection from a tilted surface; the shear waves are then focused upon a wedge-shaped edge which rests on the glass under gentle pressure and vibrates so as to generate SH waves in the glass. Group velocity, phase velocity and propagation loss were measured on substrates using several kinds of glass and various polymers. Experimental data correlate well with computation and indicate that some of these compound plates could make excellent touch-sensitive panels.
Estimated coronary heart disease attributable to insulin resistance in populations with and without type 2 diabetes mellitus. (2001)

Preventing or modifying insulin resistance may reduce the morbidity, mortality, and costs associated with CHD.
Effects of nucleating agents on the morphologies and performances of poly(vinylidene fluoride) microporous membranes via thermally induced phase separation (2012)

Abstract The effects of nucleating agents on the morphology and performance of poly(vinylidene fluoride) (PVDF) microporous membranes via thermally induced phase separation were investigated. The nucleating agents studied were dicyclohexyl benzene amide (TMB‐5), 2,2‐methylene bis(4,6‐tertiary butyl phenol) sodium phosphate (TMP‐1), and 1,3 : 2,4‐di‐ p ‐methylbenzylidene sorbitol (DM–LO). Light transmittance experiments and differential scanning calorimetry (DSC) were performed to obtain phase diagrams of PVDF/tributyl citrate/di(2‐ethylhexyl) phthalate/nucleating agent doped solutions. The morphology and performance of the prepared PVDF microporous membranes were characterized with scanning electron microscopy and microfiltration experiments. The results show that the thermodynamics of liquid–liquid phase separation were not affected by the addition of the nucleating agents, but solid–liquid phase separation was influenced. The system with 0.3 wt % TMB‐5 had the fastest crystallization rate and a better nucleation ability. The PVDF microporous membranes had a partly closed, lacy bicontinuous structure with TMP‐1 and DM–LO, whereas the membrane with 0.3 wt % TMB‐5 had an interconnected bicontinuous structure. The pore size distribution became narrower with the addition of nucleating agent. With 0.3 wt % TMB‐5, the membrane had the minimum mean pore size (0.095 μm), a porosity of 80.3%, and a pure water flux of 270 L·m −2 ·h −1 ; these values were higher than those of the pure PVDF membrane. The performances of the membranes decreased with additions of TMB‐5 of greater than 0.3 wt %. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
The antimicrobial activity of fusidic acid (1990)

Fusidic acid, a fusidane that interferes with protein synthesis via the translocase enzyme, is mainly notable for its activity against staphylococci, coagulase-positive and negative, whether or not they are resistant to methicillin and related penicillins. It is also active against corynebacteria and against many genera of strict anaerobes and microaerophiles. Mutants showing resistance, by more than one mechanism, may readily be selected in vitro. Combination of fusidic acid with other antibiotics generally gives addition or indifference, but also delays emergence of resistant mutants.
Analytical comparison of a US generic enoxaparin with the originator product: The focus on comparative assessment of antithrombin-binding components (2016)

Enoxaparin sodium, a low-molecular-weight heparin (LMWH) prepared from porcine intestinal heparin, is widely used for the prevention and treatment of venous thromboembolism. The antithrombotic activity of heparin is mediated mainly through its activation of antithrombin (AT) and subsequent inhibition of coagulation factors. Heparin is a complex heteropolymer and the sulfation pattern of its alternating uronic acid and glucosamine sugar units is a major factor influencing its biological activity. The manufacturing process itself is associated with the introduction of exogenous microheterogeneities that may further affect its biological efficacy. This is important since enoxaparin is prepared by depolymerizing the heparin with the aim of optimizing its biological activity and safety. Changes during its manufacture could thus affect its biological activity and safety. The current study was performed to assess potential differences between the originator enoxaparin and a new generic enoxaparin commercialized by Teva. Heparinase digestion, AT affinity chromatography, gel permeation chromatography, anion exchange chromatography, and nuclear magnetic resonance methodologies were used. The results indicated differences in oligosaccharides related to the cleavage selectivity around the heparin AT-binding sequences of the Teva Enoxaparin Sodium Injection, USP and the originator Sanofi enoxaparin. These differences influence the strength of the AT-binding affinity of the individual oligosaccharides, their ability to activate AT and, therefore, the inhibitory potency on the proteases of the coagulation cascade. This study, together with other published analytical reports, describes specific compositional differences between generics and originator LWMHs. However, it is yet to be established whether such variations might have any clinical relevance.
Computer‐assisted morphometry using video‐mixed microscopic images and computer graphics (1986)

A microcomputer system has been developed for collection and analysis of morphometric data from video images of histological sections. Microscopic fields of view are visualized on a video monitor and are overlaid with computer-generated graphics by means of a video mixer. Planimetric data are entered by drawing on a digitizing tablet while observing the drawn image superimposed on the tissue. Programs are available to calculate various geometric parameters, count objects in a field, perform descriptive statistics, and measure volume and surface area of a solid from a series of cross sections. A program for point-counting stereology presents single points for scoring within a user-defined reference area. The potential applications of interactive graphics in morphometry are discussed.
Thermal Properties of Binary Mixtures of Liquid Crystals (1974)

Abstract Binary mixtures of liquid crystals have been studied for a variety of reasons. For many applications a mixture will extend the mesophase temperature region particularly to cover ambient temperatures. Mixtures are sometimes used to investigate the existence of liquid crystalline phases for monotropic substances which cannot be supercooled sufficiently to allow for direct observation.15,22 A great many studies have used mixtures to determine miscibility of the two liquid crystals and the morphology of the resulting textures.1–12 Recently mixtures have been shown to be important as solvents for nuclear magnetic resonance studies and as stationary phases for gas chromatography separations.27,18
Analytical Methods in Vibrations (1967)

Book on analytical methods in vibrations covering general mathematical formulations of common features of various vibrating systems
CRISIS Y COYUNTURA DE LA ECONOMIA MEXICANA (1979)

EN MEXICO, LA CRISIS ECONOMICA TODAVIA ESTA MUY LEJOS DE SUPERARSE, A PESAR DE QUE YA SE ESTAN ALCANZANDO TASAS RELATIVAMENTE ALTAS DE CRECIMIENTO DEL PRODUCTO INTERNO BRUTO (PIB). SIN AMBERGO, ESTA CRISIS SE SIGUE MANIFESTADO BASICAMENTE EN UNA ELEVADA CONCENTRACION DE INGRESO; EN LA IMPORTACION DE GRANOS, ASI COMO EN EL SUBEMPLEO Y DESEMPLEO, OPINA EL LICENCIADO LUIS ANGELES, PROFESOR DE LA FACULTAD DE ECONOMIA Y AUTOR DE UN LIBRO SOBRE ESTE PROBLEMA TITULADO CRISI Y COYUNTURA DE LA ECONOMIA MEXICANA, QUIEN HA ESCRITO ADEMAS OTROS TRABAJOS RELACIONADOS CON EL ESTUDIO DE LA ECONOMIA NACIONAL.
A General Synthetic Route to 3,5-Substituted Boron Dipyrromethenes: Applications and Properties (2012)

An efficient protocol for the direct synthesis of 3-substituted and 3,5-disubstituted BODIPY derivatives via electrophilic attack with NBS was developed. Various substituents like ethers, sugar, hydroxyl, thiophene, sulfur, azide, tertiary amines, alkyne, vinyl, or phosphonate groups were obtained in moderate to excellent yields. The amine-substituted derivatives display unusual spectroscopic and electrochemical properties which were analyzed in solution in the presence of HCl. The diethylamino-substituted derivative has a proton association constant of log β = 4.7, and the disubstituted derivative has two association constants of log β = 6.2 and 12.1 in ethanol. In both cases, the quenching of the fluorescence is explained by photoinduced electron transfer from the tertiary amine to the Bodipy excited state.
Formation of endothelial lumens requires a coordinated PKCϵ-, Src-, Pak- and Raf-kinase-dependent signaling cascade downstream of Cdc42 activation (2009)

In this study, we present data showing that Cdc42-dependent lumen formation by endothelial cells (ECs) in three-dimensional (3D) collagen matrices involves coordinated signaling by PKCepsilon in conjunction with the Src-family kinases (SFKs) Src and Yes. Activated SFKs interact with Cdc42 in multiprotein signaling complexes that require PKCepsilon during this process. Src and Yes are differentially expressed during EC lumen formation and siRNA suppression of either kinase, but not Fyn or Lyn, results in significant inhibition of EC lumen formation. Concurrent with Cdc42 activation, PKCepsilon- and SFK-dependent signaling converge to activate p21-activated kinase (Pak)2 and Pak4 in steps that are also required for EC lumen formation. Pak2 and Pak4 further activate two Raf kinases, B-Raf and C-Raf, leading to ERK1 and ERK2 (ERK1/2) activation, which all seem to be necessary for EC lumen formation. This work reveals a multicomponent kinase signaling pathway downstream of integrin-matrix interactions and Cdc42 activation involving PKCepsilon, Src, Yes, Pak2, Pak4, B-Raf, C-Raf and ERK1/2 to control EC lumen formation in 3D collagen matrices.
Fabrication and modeling of electrochemical double-layer capacitors using carbon nano-onion electrode structures (2013)

Electrochemical capacitors or ultracapacitors (UCs) that are commercially available today overcome battery limitations in terms of charging time (from tens of minutes to seconds) and limited lifetime (from a few thousand cycles up to more than one million) but still lack specific energy and energy density (2-5% of a lithium ion battery). The latest innovations in carbon nanomaterials, such as carbon nanotubes as an active electrode material for UCs, can provide up to five times as much energy and deliver up to seven times more power than today's activated carbon electrodes. Further improvements in UC power density have been achieved by using state-of-the-art carbon nano-onions (CNOs) for ultracapacitor electrodes. CNO UCs could exhibit up to five times the power density of single-wall CNT UCs and could substantially contribute to reducing the size of an energy storage system as well as the volume and weight, thus improving device performance. This dissertation describes the fabrication of CNO electrodes as part of an UC device, the measurement and analysis of the new electrode's performance as an energy storage component, and development of a new circuit model that accurately describes the CNO UC electrical behavior. The novel model is based on the impedance spectra of CNO UCs and cyclic voltammetry measurements. Further, the model was validated using experimental data and simulation. My original contributions are the fabrication process for reliable and repeatable electrode fabrication and the modeling of a carbon nano-onion ultracapacitor. The carbon nano-onion ultracapacitor model, composed of a resistor, an inductor, a capacitor (RLC), and a constant phase element (CPE), was developed along with a parameter extraction procedure for the benefit of other users. The new model developed, proved to be more accurate than previously reported UC models.
Detection, Localization, and Action of the INSL3 Receptor, LGR8, in Rat Kidney (2005)

Recent molecular and pharmacologic studies have identified LGR8, a member of the leucine-rich repeat-containing G-protein-coupled receptor family, as a cognate receptor for insulin-like peptide-3 (INSL3). LGR8 mRNA has been detected in various tissues, but the precise roles of these INSL3-LGR8 systems are unknown. In this study we first investigated the presence and cellular localization of LGR8 mRNA in both adult and developing rat kidney and subsequently examined the possible role of INSL3-LGR8 signaling in cultured mesangial cells. LGR8 mRNA was detected in the kidney by polymerase chain reaction and localized by in situ hybridization in mature glomerular mesangial cells within the renal cortex, with highest levels detected at embryonic day 18 and lowest levels in adult kidney. Synthetic INSL3 inhibited the proliferation of mesangial cells in primary culture, indicating the presence of functional LGR8 on these cells. These findings suggest that INSL3/LGR8 signaling may be involved in the genesis and/or developmental maturation of renal glomeruli and in the regulation of mesangial cell density in the adult kidney.
FeatureHub: Towards Collaborative Data Science (2017)

Feature engineering is a critical step in a successful data science pipeline. This step, in which raw variables are transformed into features ready for inclusion in a machine learning model, can be one of the most challenging aspects of a data science effort. We propose a new paradigm for feature engineering in a collaborative framework and instantiate this idea in a platform, FeatureHub. In our approach, independent data scientists collaborate on a feature engineering task, viewing and discussing each others' features in real-time. Feature engineering source code created by independent data scientists is then integrated into a single predictive machine learning model. Our platform includes an automated machine learning backend which abstracts model training, selection, and tuning, allowing users to focus on feature engineering while still receiving immediate feedback on the performance of their features. We use a tightly-integrated forum, native feature discovery APIs, and targeted compensation mechanisms to facilitate and incentivize collaboration among data scientists. This approach can reduce the redundancy from independent or competitive data scientists while decreasing time to task completion. In experimental results, automatically generated models using crowdsourced features show performance within 0.03 or 0.05 points of winning submissions, with minimal human oversight.
Apoptotic markers p53, Bcl-2 and Bax in primary lung cancer. (2007)

The expression of p53, Bcl-2 and Bax was altered in lung cancer tissue compared to histologically normal bronchial epithelium. The difference between apoptotic marker expression in NSCLC and SCLC could reflect the different pathogenesis of these two lung pathologies.
Planar Object Detection using Local Feature Descriptors (2011)

Object recognition is a rapidly developing area of research. In our work we concentrate on detection and recognition of planar objects, like images and logos. a planar object is located in an image by finding a homography between the images. We describe the overall methodology for finding this homography using local feature description and matching. We also describe the most prominent algorithms used for locating and describing local features. We present multiple criteria for the homography to reduce the number of false positives and measure their impact on hand-made ground truth datasets.
Numerical Calculation of Secondary Fluorescence Effects Near Phase Boundaries in EPMA (2008)

Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008