gebhart/patrepeval huggingface dataset:
Unified constant-frequency integration control of three-phase active-power-filter with vector operation (2002)

In this paper, a unified constant-frequency integration control (UCI) scheme is proposed for a three-phase active power filter (APF). The proposed control method eliminates the need of sensing the three-phase load current, the nontrivial task of calculating the harmonics and reactive current components, as well as the use of any multipliers, as required by previously reported control methods. By applying one-cycle control and sensing the mains line current, unity power factor and low input current distortion can be realized by one integrator with reset along with a few linear and logic components such as flip-flops, comparators, and clock. All findings are supported by experimental results.
AN IMPROVED METHOD FOR THE CONVERSION OF SACCHARIDES INTO FURFURAL DERIVATIVES (1982)

Abstract An improved method for the preparation of furan compounds by dehydrating saccharides with hydrochloric acid either in a mixture containing water, organic solvent and a catalytic amount of a surface active agent or in the presence of magnesium halide is described.
Video-Based Noncooperative Iris Image Segmentation (2010)

In this paper, we propose a video-based noncooperative iris image segmentation scheme that incorporates a quality filter to quickly eliminate images without an eye, employs a coarse-to-fine segmentation scheme to improve the overall efficiency, uses a direct least squares fitting of ellipses method to model the deformed pupil and limbic boundaries, and develops a window gradient-based method to remove noise in the iris region. A remote iris acquisition system is set up to collect noncooperative iris video images. An objective method is used to quantitatively evaluate the accuracy of the segmentation results. The experimental results demonstrate the effectiveness of this method. The proposed method would make noncooperative iris recognition or iris surveillance possible.
Cross-linked enzyme crystals as robust biocatalysts (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCross-linked enzyme crystals as robust biocatalystsNancy L. St. Clair and Manuel A. NaviaCite this: J. Am. Chem. Soc. 1992, 114, 18, 7314–7316Publication Date (Print):August 1, 1992Publication History Published online1 May 2002Published inissue 1 August 1992https://pubs.acs.org/doi/10.1021/ja00044a064https://doi.org/10.1021/ja00044a064research-articleACS PublicationsRequest reuse permissionsArticle Views867Altmetric-Citations238LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts
THEORY AND APPLICATIONS OF LASER GENERATED ZERO-GROUP VELOCITY LAMB MODE RESONANCE (2008)

Lamb modes exhibit a resonant behavior at frequencies where the group velocity vanishes while the phase velocity remains finite. This type of zero group velocity (ZGV) point exists in most isotropic materials at the minimum frequency‐thickness product of the first order symmetric (S1) Lamb mode. Laser sources couple efficiently into this resonance and a sharp peak is observed with source and receiver on epicentre. A model for the laser generation of ultrasound in thin plates using an amplitude modulated laser source is presented. Lamb wave displacement spectra are measured using an amplitude modulated laser source for excitation and a Michelson interferometer coupled to an RF lock‐in amplifier for detection. The displacement spectra of Lamb waves generated in micron scale plates show good agreement with theoretical predictions. Experimental results are presented demonstrating excitation of the S1 ZGV resonance in a 4μm thick membrane using a high frequency (700 MHz) amplitude modulated laser source. Subsurface features below the membrane are detected by tracking the S1 ZGV resonance peak as the sample is scanned.
Surface plasmon coupled chemiluminescence from iron thin films: Directional and approaching fixed angle observation (2009)

We report the observation of surface plasmon coupled chemiluminescence (SPCC) from iron thin films. Theoretical Fresnel calculations were employed to determine the optimum thickness of iron thin films to be 15 nm, which is assessed by the value of minimum reflectivity curves for incident light upon the thin film. An overlayer 10 nm thick SiO2 was used to protect the iron thin films from oxidation by air or physical changes induced by chemiluminescent solutions. SPCC emission from blue, green, and chartreuse chemiluminescent solutions on iron films can be observed at a fixed angle of 60° for all the chemiluminescent solutions, while free-space emission was isotropic. Iron thin films do not have a catalytic effect on chemiluminescence emission.
A quantitative model for transforming reflectance spectra into the Munsell color space using cone sensitivity functions and opponent process weights (2003)

This article presents a computational model of the process through which the human visual system transforms reflectance spectra into perceptions of color. Using physical reflectance spectra data and standard human cone sensitivity functions we describe the transformations necessary for predicting the location of colors in the Munsell color space. These transformations include quantitative estimates of the opponent process weights needed to transform cone activations into Munsell color space coordinates. Using these opponent process weights, the Munsell position of specific colors can be predicted from their physical spectra with a mean correlation of 0.989.
Low-Pressure Flow Chemistry of CuAAC Click Reaction Catalyzed by Nanoporous AuCu Membrane (2018)

Click chemistry has been widely used in bioconjugation, polymer synthesis, and the development of new anticancer drugs. Here, we report a nanoporous membrane made of AuCu alloy nanowires, which can effectively catalyze copper(I)-catalyzed 1,3-dipolar cycloaddition between azide and terminal alkyne (CuAAC) in flow condition with pressure less than one bar. Comparison studies of the nanowires before and after the reaction using X-ray photoelectron spectroscopy reveal Cu(0) and Cu(I) are main species that promote the reaction. This simple strategy can be used to synthesize a variety of compounds with triazole linkage and extended to gram level chemical production.
Temperature-compensated sapphire resonator for ultra-stable oscillator capability at temperatures above 77 K (1995)

We report on the design and test of a whispering gallery sapphire resonator for which the dominant (WGH/sub n11/) microwave mode family shows frequency-stable, compensated operation for temperatures above 77 K. The resonator makes possible a new ultra-stable oscillator (USO) capability that promises performance improvements over the best available crystal quartz oscillators in a compact cryogenic package. A mechanical compensation mechanism, enabled by the difference between copper and sapphire expansion coefficients, tunes the resonator to cancel the temperature variation of sapphire's dielectric constant. In experimental tests, the WGH/sub 811/ mode showed a frequency turnover temperature of 87 K in agreement with finite element calculations. Preliminary tests of oscillator operation show an Allan Deviation of frequency variation of 1.4-6/spl times/10/sup -12/ for measuring times 1 s /spl les//spl tau//spl les/100 s with unstabilized resonator housing temperature and a mode Q of 2/spl times/10/sup 6/. We project a frequency stability 10/sup -14/ for this resonator with stabilized housing temperature and with a mode Q of 10/sup 7/.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
A humanized antibody with specificity for hepatitis B surface antigen. (1996)

A murine monoclonal antibody H67 was characterized for the binding specificity, which showed that H67 recognizes a disulfide-bond-dependent conformational epitope of common a antigenic determinant on the hepatitis B surface antigen. The result suggested that this antibody may have the potential of replacing hepatitis B immune globulin in the prevention of hepatitis B virus (HBV) infection. Therefore, we have constructed the humanized antibody HuS10 by grafting the complementarity determining regions and some framework amino acid residues of H67 onto the most homologous human antibody variable regions, 21/28 for heavy chain variable region and B1 and J kappa 2 for light chain variable region, followed by combining with human constant regions C gamma 1 and C kappa. The affinity of the HuS10 was the same as that of the H67, 8 x 10(8) x 10(8)M-1, and the HuS10 neutralized the in vitro infection of adult human hepatocyte primary culture by adr or ayw subtype of HBV. The neutralization assay showed that the HuS10 had approximately 2,000-times higher specific activity than commercially available polyclonal HBIG. These results suggest that the humanized antibody will be useful in the prevention or treatment of HBV infection.
Activating Mutations of <i>NOTCH1</i> in Human T Cell Acute Lymphoblastic Leukemia (2004)

Very rare cases of human T cell acute lymphoblastic leukemia (T-ALL) harbor chromosomal translocations that involve NOTCH1, a gene encoding a transmembrane receptor that regulates normal T cell development. Here, we report that more than 50% of human T-ALLs, including tumors from all major molecular oncogenic subtypes, have activating mutations that involve the extracellular heterodimerization domain and/or the C-terminal PEST domain of NOTCH1. These findings greatly expand the role of activated NOTCH1 in the molecular pathogenesis of human T-ALL and provide a strong rationale for targeted therapies that interfere with NOTCH signaling.
Development of a numerical simulator of human swallowing using a particle method (Part 2. Evaluation of the accuracy of a swallowing simulation using the 3D MPS method) (2013)

The aim of this study was to develop and evaluate the accuracy of a three-dimensional (3D) numerical simulator of the swallowing action using the 3D moving particle simulation (MPS) method, which can simulate splashes and rapid changes in the free surfaces of food materials. The 3D numerical simulator of the swallowing action using the MPS method was developed based on accurate organ models, which contains forced transformation by elapsed time. The validity of the simulation results were evaluated qualitatively based on comparisons with videofluorography (VF) images. To evaluate the validity of the simulation results quantitatively, the normalized brightness around the vallecula was used as the evaluation parameter. The positions and configurations of the food bolus during each time step were compared in the simulated and VF images. The simulation results corresponded to the VF images during each time step in the visual evaluations, which suggested that the simulation was qualitatively correct. The normalized brightness of the simulated and VF images corresponded exactly at all time steps. This showed that the simulation results, which contained information on changes in the organs and the food bolus, were numerically correct. Based on these results, the accuracy of this simulator was high and it could be used to study the mechanism of disorders that cause dysphasia. This simulator also calculated the shear rate at a specific point and the timing with Newtonian and non-Newtonian fluids. We think that the information provided by this simulator could be useful for development of food products, medicines, and in rehabilitation facilities.
Two-dimensional phononic crystal slab defect mode micromechanical resonators (2009)

By creating line defects cavities in the structure of a phononic crystal (PC) made by etching a hexagonal (honeycomb) array of holes in a 15μm-thick slab of silicon, high-Q PC resonators are fabricated and tested using a complimentary-metal- oxide-semiconductor-compatible process. The radii of the holes are approximately 6.4μm and the spacing between nearest holes is 15μm. We show that the complete phononic band gap of the PC structure supports resonant modes with quality factors of more than 6000 at frequencies as high as 126MHz in the resonator structure. The very good confinement of acoustic energy is achieved by using only a few PC layers confining the cavity region. The calculated frequencies of resonance of the structure using finite element method are in a very good agreement with the experimental data. The performance of these PC resonator structures makes them excellent candidates for wireless communication and sensing applications.
Insulin‐like Growth Factor II in Gynecological Cancers: A Preliminary Study (2003)

We propose that measurement and identification of IGF-II in the cervical biopsy may be a sensitive method of detecting cervical cancer and metastatic spread in the lymph nodes.
Ergonomic Redesign of a Laparoscopic Grasper (2003)

Laparoscopic surgery requires surgeons to perform complex procedures using a standardized set of tools. Most tools, including the common laparoscopic grasper, do not currently provide surgeons with comfortable, intuitive control. A new laparoscopic grasper has been designed which follows ergonomic principles for the handle and actuation of an articulated tip. This tool has been prototyped and will be tested by surgeons. This tool will benefit both the surgeon with reduced discomfort and the patient with a safer procedure.
Sample Adaptive Offset Design in HEVC (2013)

This paper is devoted to Sample Adaptive Offset (SAO). This technique was recently added into High Efficiency Video Coding (HEVC) standard. The concept of SAO is to reduce sample distortion of a region by classifying the region samples into multiple categories, obtaining an offset for each category, and then adding the offset to each sample, where the classifier index and the offsets are coded in the bit stream.
Microchannel Plate Streak Camera (1985)

The Development Of A Streak Camera Using Microchannel Plate Electron Multiplier As The Cathode Is Presented. Potential Applications To Y-Rays, Low Energy X-Rays And Charged Particles Are Described. Preliminary Test Shows That 150 Ps Resolution Can Be Obtained.
Novel View Synthesis of Dynamic Scenes With Globally Coherent Depths From a Monocular Camera (2020)

This paper presents a new method to synthesize an image from arbitrary views and times given a collection of images of a dynamic scene. A key challenge for the novel view synthesis arises from dynamic scene reconstruction where epipolar geometry does not apply to the local motion of dynamic contents. To address this challenge, we propose to combine the depth from single view (DSV) and the depth from multi-view stereo (DMV), where DSV is complete, i.e., a depth is assigned to every pixel, yet view-variant in its scale, while DMV is view-invariant yet incomplete. Our insight is that although its scale and quality are inconsistent with other views, the depth estimation from a single view can be used to reason about the globally coherent geometry of dynamic contents. We cast this problem as learning to correct the scale of DSV, and to refine each depth with locally consistent motions between views to form a coherent depth estimation. We integrate these tasks into a depth fusion network in a self-supervised fashion. Given the fused depth maps, we synthesize a photorealistic virtual view in a specific location and time with our deep blending network that completes the scene and renders the virtual view. We evaluate our method of depth estimation and view synthesis on a diverse real-world dynamic scenes and show the outstanding performance over existing methods.
3D Capacitive Interconnections for High Speed Interchip Communication (2007)

A 3D interconnection scheme based on capacitive coupling for high speed chip to chip communication has been implemented in a 0.13 <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">μ</i> m CMOS process. This paper provides detailed design example for both synchronous and asynchronous transmitter and receiver circuits. The first approach shows with electrodes 15×15 <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">μm<sup>2</sup></i> a wide range of operating frequency up to 900 <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">MHz</i> with an energy consumption of <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">41fJ/bit</i> . In the asynchronous scheme we demonstrate with electrodes 8×8 <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">μm<sup>2</sup></i> a vertical propagation of clock at <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1.7GHz and a propagation delay of <i>420ps</i> for general purpose signal with energy consumption of <i>80fJ/bit</i>. Functionality and performance have been demonstrated by using both die-level and wafer-level assembly flows and BER measurements show the reliability of these AC interconnections with no error on more than <i>10<sup>13</sup></i> bits transmitted.</i>
Melt processed microporous films from compatibilized immiscible blends with potential as membranes (2002)

Abstract Microporous flat films with potential as membranes were produced via melt processing and post‐extrusion drawing from immiscible polypropylene/polystyrene blends containing a compatibilizing copolymer. The blends were first compounded in a co‐rotating twin‐screw extruder and subsequently extruded through a sheet die to obtain the precursor films. These were uniaxially drawn (100%–500%) with respect to the original dimensions to induce porosity and then post‐treated at elevated temperatures to stabilize the resultant structure, which consisted of uniform microcracks in the order of a few nanometers in width. The effects of blend composition and extrusion process parameters on surface and cross‐sectional porosity and solvent permeability of the prepared films are presented and related to specific microstructural features of the films before and after drawing. Finite element modeling of the stretching operation in the solid state yielded a successful interpretation of the blend response to uniaxial tension that resulted in microcrack formation. Comparison of some of the novel microporous structures of this work with commercial membranes prepared by solvent‐based phase inversion processes suggests comparable pore size and porosity ranges, with narrower pore size distribution.
Glucose-Neopentyl Glycol (GNG) amphiphiles for membrane protein study (2012)

The development of a new class of surfactants for membrane protein manipulation, "GNG amphiphiles", is reported. These amphiphiles display promising behavior for membrane proteins, as demonstrated recently by the high resolution structure of a sodium-pumping pyrophosphatase reported by Kellosalo et al. (Science, 2012, 337, 473).
Peptide inhibitor of morphine- and beta-endorphin-induced analgesia. (1980)

The synthetic beta-endorphin analogs with the omission of the NH2-terminal [Met]enkephalin segment [beta-endorphin-(6-31) and beta-endorphin-(20-31)] are shown to inhibit morphine- or beta-endorphin-induced analgesia in mice by the tail-flick test, whereas the synthetic NH2-terminal pentadecapeptide beta-endorphin-(1-15) has no inhibitory activity. This study raises the possibility that endogenous inhibiting peptides exist in the brain which play a role in the regulation of endorphin actions.
Development of advanced lithium-ion rechargeable cells with improved low temperature performance (2002)

Due to future plans to explore Mars and the outer planets, NASA has interest in developing lithium-ion rechargeable batteries that are capable of operating at low temperatures. To address these problems, we have initiated research focused upon the development of advanced electrolyte systems for lithium-ion cells with improved low temperature performance. Promising electrolyte solutions were selected based on conductivity and stability considerations and incorporated into C/LiCoO/sub 2/ cells for evaluation. The discharge capacity and rate capability as a function of temperature were evaluated in two types of lithium-ion cells, consisting of graphite-based systems with EC-based electrolytes and coke-based systems with PC-based electrolytes. Some of the experimental lithium-ion cells fabricated with these electrolytes were found to be capable of operating at temperatures as low as -30/spl deg/C (both charging and discharging at -30/spl deg/C) and provide more than 55% of the room temperature capacity. Cycle life testing of the these cells at -20/spl deg/C and at room temperature is in progress. Some of the cells have completed more than 500 cycles to date (100% DOD).
Reduction of the streak artifacts in circular cone beam CT using scanograms (2007)

We propose a method to estimate line data from scanogram in a CT scan. Combining the circle data with the estimated line data, we can reconstruct the volumetric images by use of an exact filtered backprojection or backprojection filtration algorithm for circle-line trajectories. The results show that the streak artifacts are reduced significantly compared to that of circle-only reconstruction.
Preparation of Dichloroacetaldehyde Cyclic Trimer and Its Depolymerization (1993)

Abstract Dichlorination of paraldehyde followed by hydration gave white crystals of dichloroacetaldehyde(DCA) hydrate which were treated with concd sulfuric acid at 0 °C to afford a cyclic trimer of DCA as a quite stable precursor of DCA.