gebhart/patrepeval huggingface dataset:
An adaptive dead-time control scheme for high-switching-frequency dual-active-bridge converter (2012)

In high-switching-frequency isolated dc-dc converters, dead-time has a great influence on the switching transition behavior of switching devices. Fixed dead-time is determined by the longest required dead-time and results in missing zero-voltage-switching (ZVS) in some operation conditions, which causes undesirable switching stress and ringing, and efficiency degradation of converter. This paper proposes an adaptive dead-time control scheme for the high-switching-frequency dual-active-bridge (DAB) dc-dc converter. The proposed scheme feedbacks the V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ds</inf> of primary side switch and can auto-tune the dead-time to make the primary side switching devices work under zero-voltage condition and to increase the converter efficiency. The scheme was implemented in a 5 kW 500 kHz DAB converter prototype, and the experimental results verified the effectiveness of proposed scheme.
Determination of SMN1/SMN2 Gene Dosage by a Quantitative Genotyping Platform Combining Capillary Electrophoresis and MALDI-TOF Mass Spectrometry (2006)

This quantitative genotyping platform is suitable for detection of SMA. The described approach may serve as a general quantitative genotyping method for molecular diagnosis of other inheritable diseases.
HDL cholesterol: results of interlaboratory proficiency tests. (1980)

Journal Article HDL cholesterol: results of interlaboratory proficiency tests. Get access G R Warnick, G R Warnick Search for other works by this author on: Oxford Academic Google Scholar J J Albers, J J Albers Search for other works by this author on: Oxford Academic Google Scholar E T Leary E T Leary Search for other works by this author on: Oxford Academic Google Scholar Clinical Chemistry, Volume 26, Issue 1, 1 January 1980, Pages 169–170, https://doi.org/10.1093/clinchem/26.1.169 Published: 01 January 1980
Treatment alternatives for Greater-Than-Class C low-level waste (1990)

Technically and economically viable treatment methods that are amenable to remote operation and that produce waste forms with acceptable properties are needed for treating Greater-Than-Class C low-level waste (GTCC LLW). Processes under consideration are size reduction, incineration, vitrification, cementation, decontamination, and plasma melting. Factors influencing the selection of these technologies, including waste characteristics and waste form disposal criteria are discussed in this paper. The bulk of GTCC LLW is activated and contaminated metals, but other identified materials are combustible trash, cartridge filters, sludges, and ion exchange resins. Methods for treating GTCC LLW are being evaluated to assure that the treated waste form will meet storage and disposal requirements as set forth by regulatory agencies. Appropriate treatment methods can improve waste form quality and save on disposal costs by minimizing volume. Over the next several years, the US Department of Energy, through its National Low-Level waste Management program, plans to perform bench- and pilot-scale tests on various treatment technologies. Radioactive demonstrations will then be conducted where appropriate in preparation for building a treatment facility. The purpose of this paper is to describe the treatment technologies under consideration in this effort. Factors influencing the selection, including waste characteristics and waste form disposalmore » criteria are also discussed. 9 refs., 2 tabs.« less
Detection of volatile organic compound vapors by using a vapochromic material on a tapered optical fiber (2000)

A low-cost optical fiber sensor to detect volatile organic compounds has been developed. Changes of up to 13.5 dB in the transmitted optical power have been detected with different concentrations of acetone and dichloromethane vapors. The device uses a standard single-mode fiber. The sensing mechanism relies on a vapor-induced refractive index change in a film of a vapochromic material deposited on the thinner region of a tapered fiber.
Genome-Wide Analysis of the Cyclin Family in Arabidopsis and Comparative Phylogenetic Analysis of Plant Cyclin-Like Proteins  (2004)

Cyclins are primary regulators of the activity of cyclin-dependent kinases, which are known to play critical roles in controlling eukaryotic cell cycle progression. While there has been extensive research on cell cycle mechanisms and cyclin function in animals and yeasts, only a small number of plant cyclins have been characterized functionally. In this paper, we describe an exhaustive search for cyclin genes in the Arabidopsis genome and among available sequences from other vascular plants. Based on phylogenetic analysis, we define 10 classes of plant cyclins, four of which are plant-specific, and a fifth is shared between plants and protists but not animals. Microarray and reverse transcriptase-polymerase chain reaction analyses further provide expression profiles of cyclin genes in different tissues of wild-type Arabidopsis plants. Comparative phylogenetic studies of 174 plant cyclins were also performed. The phylogenetic results imply that the cyclin gene family in plants has experienced more gene duplication events than in animals. Expression patterns and phylogenetic analyses of Arabidopsis cyclin genes suggest potential gene redundancy among members belonging to the same group. We discuss possible divergence and conservation of some plant cyclins. Our study provides an opportunity to rapidly assess the position of plant cyclin genes in terms of evolution and classification, serving as a guide for further functional study of plant cyclins.
Synthesis and characterization of novel spiro penta- and hexacoordinate anionic polysiliconate and polygermylate ionomers derived from the condensation of ({plus_minus}) 5,5{prime}, 6,6{prime} - Tetrahydroxy-1,1{prime} - spiro-bis(Indane) with trialkoxysilanes, tetraalkoxysilanes, and trialkoxygermanes (1993)

Synthesis of hybrid organic-inorganic materials with ionic functionality within the polymer backbone has been achieved. A new family of hypervalent spiro anionic polysiliconates and polygermylates has been prepared. These materials were shown to be thermally stable to moderate temperatures and are completely air and moisture stable. Analysis by solution and solid state NMR verified the presence of the hypervalent functionality. We are currently examining the effect that alteration of the condensing reagent and/or the counterion may have on bulk properties of the ionomeric material.
Habitat Utilization by Neotoma lepida in the Mohave Desert (1972)

Habitat utilization by the desert woodrat, Neotoma lepida, was investigated in the Mohave Desert. Neotoma lepida occurs in three types of habitat in Joshua Tree National Monument—semidesert rock outcrop, desert wash, and cactus. Construction of houses and dietary composition of food caches and stomachs were analyzed for each habitat and were found to be different. The desert woodrat has successfully increased its exploitation of these habitats by constructing houses from whatever materials are available in a particular habitat and also by utilizing a wide taxonomic and morphologic spectrum of food plants. Such methods of habitat utilization have, in those cases investigated, provided a degree of plasticity enabling successful coexistence with competing species.
A CMOS clock and data recovery with two-XOR phase-frequency detector circuit (2002)

This paper describes a 1.0 Gbps Clock and Data Recovery circuit with a simple PFD structure. The proposed circuit is based on a single loop controlled by a Phase Frequency Detector (PFD) which has two-XOR gates. The VCO composed of four differential buffer stages generates eight differential clocks each spaced by 45/spl deg/. The PFD generates the VCO control signal by comparing two different phase clocks and input data. The circuit operates on 800 Mbps to 1.2 Gbps data rate under 2.5 V supply using 0.25 /spl mu/m-CMOS HSPICE simulation. The circuit is under fabrication. The measured results are presented.
Reactivation of Herpes Simplex Virus after Decompression of the Trigeminal Nerve Root (1978)

Reactivation of herpes simplex virus was prospectively studied in patients after microneurosurgical decompression of the trigeminal sensory root, a new operation for trigeminal neuralgia in which the nerve is not sectioned. Reactivation was detected in 28 (50%) of 56 patients. Virus was cultured from oropharyngeal secretions in 25 patients, and 21 patients developed cutaneous herpetic lesions. Seven patients had positive throat-wash (TW) cultures but did not develop lesions, and the converse occurred in three patients. Eighteen patients had both positive TW cultures and herpetic lesions. In eight of nine instances in which a sequence was determinable, TW cultures were positive before lesions developed. A history of recurrent herpes labialis was associated with a higher risk of developing reactivation postoperatively (59.4% vs. 31.6%, P less than 0.05). These observations suggest that minimal stimulation or inapparent trauma to the trigeminal sensory root is sufficient to activate latent herpes simplex virus in humans. These patients provide unique opportunities to study immunologic responses and therapeutic measures.
Evaluation of the Effects of BioCell Collagen, a Novel Cartilage Extract, on Connective Tissue Support and Functional Recovery From Exercise. (2015)

The study's preliminary data are promising with regard to the beneficial effects of the extract on connective tissue protection and recovery in those engaged in routine resistance training and cardiovascular exercise. A larger study is warranted to confirm and refine these findings.
Inhibition of macrophage tumoricidal activity by glucocorticoids. (1988)

In this study, the effect of corticosteroids on the activation of macrophages to a fully tumoricidal state was examined. Thioglycolate-elicited peritoneal exudate macrophages from C3H/HeJ mice were rendered cytolytic for P815 mastocytoma cells in a two-signal tumoricidal assay that used recombinant interferon-gamma (rIFN-gamma; 1 to 10 U/ml) as a "priming" signal and butanol-extracted lipopolysaccharide (But-LPS; 0.1 to 5 micrograms/ml) as a "trigger" signal. Treatment of macrophages with either rIFN-gamma alone or But-LPS alone failed to result in significant cytolytic ability. Tumoricidal activity was markedly inhibited in a dose-dependent fashion when glucocorticoids were added simultaneously to the cultures with rIFN-gamma and But-LPS at concentrations ranging from 1 X 10(-10) to 1 X 10(-5) M. Nonglucocorticoid sex hormones failed to inhibit tumoricidal activity in this system under identical culture conditions. Inhibition was most effective if the glucocorticoids were added simultaneously with the priming and triggering signals (rIFN-gamma and But-LPS); however, if the glucocorticoids were added 24 hr after the signals were provided to the cultures, suboptimal inhibition was observed. Experiments that dissociated the priming phase of activation from the triggering phase showed that glucocorticoids inhibited both the rIFN-gamma-induced priming stage as well as the But-LPS-induced triggering stage of activation. These observations provide evidence that glucocorticoids, but not other steroid hormones, inhibit the activation of macrophages to a fully tumoricidal state by interfering with either the priming or triggering signals in this two-signal model of macrophage activation.
Detecting Design Defects Caused by Design Rule Violations (2009)

Research has shown that unintended violations of dependencies can incur modularity decay, higher maintenance cost, and software defects. However, dependency violations may be undetected by traditional software verification and validation techniques. In this paper, we present an approach to detect potential design defects caused by the violation of design rules. We identify the patterns of how different components change together to implement modification requests, and use a logical model to predict change scope according to the design rule theory. We then calculate the differences between the predicted and actual co-change patterns to reveal potential defects. To evaluate our approach, we investigated the version history of 15 releases of Hadoop and 9 releases of Derby. Our approach revealed such issues as poorly designed inheritance hierarchies, tightly coupled cyclical dependencies, and code clones. Some problems we identified were indeed refactored in later versions, validating the effectiveness of our approach. Categories and Subject Descriptors D.2.10 [Software Engineering]: Design—design defect
The prognostic significance of angiogenesis in epithelial ovarian carcinoma. (1999)

The molecular biology underlying the metastatic process in ovarian carcinoma remains poorly understood. For other neoplasms, the induction of angiogenesis by malignant cells has been shown to play a pivotal role in the process of tumor proliferation and metastasis. The purpose of this study was to characterize the degree of angiogenesis in epithelial ovarian malignancies and to determine whether the degree of neovascularization has prognostic significance for survival. Tissue sections obtained from 88 ovarian cancer patients were examined immunohistochemically for angiogenesis after staining with anti-human endothelial cell antibodies to von Willebrand factor and CD31. Light microscopy was performed, and individual microvessel counts were quantified at high power (x400). A chart review was completed, collating data regarding age, stage, grade, status of disease, and survival. Statistical exploratory methods were used to find potentially useful prognostic cutpoints for marker values of angiogenesis. Of the total 88 patients, tissue microvessel counts from 85 were evaluated via antibodies to von Willebrand factor and 87 for CD31. Overall, median survival was 2.7 years in women with cancers containing high microvessel counts versus 7.9 years in those with low microvessel counts (P = 0.03). A low microvessel count was associated with better 5-year survival in both early stage (I and II) and advanced stage (III and IV) disease. Our data suggest that the degree of neovascularization may have prognostic significance in epithelial ovarian carcinoma, especially for women with early-stage disease. In this group of women, the degree of angiogenesis may allow the selection of women at high risk for recurrence who may benefit from aggressive adjuvant therapy.
Collaborative Summarization of Topic-Related Videos (2017)

Large collections of videos are grouped into clusters by a topic keyword, such as Eiffel Tower or Surfing, with many important visual concepts repeating across them. Such a topically close set of videos have mutual influence on each other, which could be used to summarize one of them by exploiting information from others in the set. We build on this intuition to develop a novel approach to extract a summary that simultaneously captures both important particularities arising in the given video, as well as, generalities identified from the set of videos. The topic-related videos provide visual context to identify the important parts of the video being summarized. We achieve this by developing a collaborative sparse optimization method which can be efficiently solved by a half-quadratic minimization algorithm. Our work builds upon the idea of collaborative techniques from information retrieval and natural language processing, which typically use the attributes of other similar objects to predict the attribute of a given object. Experiments on two challenging and diverse datasets well demonstrate the efficacy of our approach over state-of-the-art methods.
Video as memorabilia (2012)

Digital memorabilia, such as video remixes, can increase the value of attending music events. Remixes can be made using video clips recorded by attendees during the event; however, producing them is a laborious task. In this paper we study the prospects of an automatic video remixing and present the results of a study on users' perceptions and attitudes towards collaborative automatic mobile video production. The three findings are as follows: People assess automatic video remix memorabilia as fairly equal to amateur-made manual ones, even if the manually-created video remixes are better in overall quality; as a remixing actor, a computer can be perceived to be more trustworthy than a human remixer; and, the quality of the video remix and the publication forum of the remix outcome plays a significant role when people are deciding whether or not they need public acknowledgement for their contribution. We conclude by discussing the design implications for collaborative automatic mobile video production.
<title>Subpixel distance maps and weighted distance transforms</title> (1993)

An algorithm for computing the Euclidean distance from the boundary of a given digitized shape is presented. The distance is calculated with sub-pixel accuracy. The algorithm is based on an equal distance contour evolution process. The moving contour is embedded as a level set in a time varying function of higher dimension. This representation of the evolving contour makes possible the use of an accurate and stable numerical scheme, due to Osher and Sethian.
A Retrotransposon-Mediated Gene Duplication Underlies Morphological Variation of Tomato Fruit (2008)

Edible fruits, such as that of the tomato plant and other vegetable crops, are markedly diverse in shape and size. SUN, one of the major genes controlling the elongated fruit shape of tomato, was positionally cloned and found to encode a member of the IQ67 domain-containing family. We show that the locus arose as a result of an unusual 24.7-kilobase gene duplication event mediated by the long terminal repeat retrotransposon Rider. This event resulted in a new genomic context that increased SUN expression relative to that of the ancestral copy, culminating in an elongated fruit shape. Our discovery demonstrates that retrotransposons may be a major driving force in genome evolution and gene duplication, resulting in phenotypic change in plants.
Integrated waveguide modulator using a LiNbO/sub 3/ TE to or from TM convertor for electrooptic coherence modulation of light (1988)

The authors report a wavelength independent TE-TM mode convertor used as a waveguide electrooptic modulator in a coherence modulated system. The modulation voltages thus obtained (20 V) are about 10 times lower than those previously reported in earlier coherence modulated devices. The modulator is a strip waveguide fabricated on Y-cut Z-propagation, Ti-indiffused LiNbO/sub 3/. When used in conjunction with a birefringent plate and polarizers, the modulator is shown to imprint on light a signal encoded into an optical delay greater than the source coherence length. Demonstration of the device is reported using a highly multimode laser diode at 820 nm.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Direct Transcription of Two‐Dimensional Colloidal Crystal Arrays into Three‐Dimensional Photonic Crystals (2012)

Abstract A simple protocol for the fabrication of three‐dimensional (3D) photonic crystals in silicon is presented. Surface structuring by nanosphere lithography is merged with a novel silicon etching method to fabricate ordered 3D architectures. The SPRIE method, sequential passivation reactive ion etching, is a one‐step processing protocol relying on sequential passivation and reactive ion etching reactions using C 4 F 8 and SF 6 plasma chemistries. The diffusion of fresh reactants and etch product species inside the etched channels is found to play an important role affecting the structural uniformity of the designed structures and the etch rate drift is corrected by adjusting the reaction times. High quality photonic crystals are thus obtained by adding the third dimension to the two‐dimensional (2D) colloidal crystal assemblies through SPRIE. Careful adjustments of both mask design and lateral etch extent balance allow the implementation of even more complex functionalities including photonic crystal slabs and precise defect engineering. 3D photonic crystal lattices exhibiting optical stop‐bands in the infrared spectral region are demonstrated, proving the potential of SPRIE for fast, simple, and large‐scale fabrication of photonic structures.
Charge distribution induced inside complex plasmonic nanoparticles (2010)

We developed a versatile numerical technique to compute the three-dimensional charge distribution inside plasmonic nanoparticles. This method can be easily applied to investigate the charge distribution inside arbitrarily complex plasmonic nanostructures and to identify the nature of the multipolar plasmon modes involved at plasmonic resonances. Its ability to unravel the physical origin of plasmonic spectral features is demonstrated in the case of a single gold nanotriangle and of a gold nano-antenna. Finally, we show how the volume charge distribution can be used to define and compute the first terms of the multipolar expansion.
Query optimization in a memory-resident domain relational calculus database system (1990)

We present techniques for optimizing queries in memory-resident database systems. Optimization techniques in memory-resident database systems differ significantly from those in conventional disk-resident database systems. In this paper we address the following aspects of query optimization in such systems and present specific solutions for them: (1) a new approach to developing a CPU-intensive cost model; (2) new optimization strategies for main-memory query processing; (3) new insight into join algorithms and access structures that take advantage of memory residency of data; and (4) the effect of the operating system's scheduling algorithm on the memory-residency assumption. We present an interesting result that a major cost of processing queries in memory-resident database systems is incurred by evaluation of predicates. We discuss optimization techniques using the Office-by-Example (OBE) that has been under development at IBM Research. We also present the results of performance measurements, which prove to be excellent in the current state of the art. Despite recent work on memory-resident database systems, query optimization aspects in these systems have not been well studied. We believe this paper opens the issues of query optimization in memory-resident database systems and presents practical solutions to them.
Inhibition of lipolysis may contribute to the acute regulation of plasma FFA and glucose by FGF21 in <i>ob</i>/<i>ob</i> mice (2009)

FGF21 is a unique member of the fibroblast growth factors (FGFs) and a novel hormone that regulates glucose, lipid, and energy homeostasis. The beneficial effects of FGF21 reported thus far have mostly been from chronic treatments. In order to better understand the mechanism for FGF21 action, we evaluated the acute effects of FGF21 in vivo and in vitro. Here we report that a single injection of FGF21 acutely reduced plasma free fatty acid levels similar to its acute effects on plasma glucose in ob/ob mice. In vitro, FGF21 inhibited lipolysis in adipocytes during a short treatment and reduced total lipase activity. These results demonstrate the potential importance of adipocyte lipolysis to the observed acute improvements in plasma parameters.
X-Y positioner driven by electrostatic motor (2002)

An X-Y positioner driven by an electrostatic motor named the dual excitation electrostatic motor was developed. Unique configuration of the positioner utilizing a characteristic of the motor balances inertia mass in the two axes to achieve good dynamic characteristics of the positioner. A prototype positioner was fabricated and tested. The prototype generated a thrust force of approximately 35 N in each axis, and a positioning resolution of 200 /spl mu/m was obtained. To improve the resolution, the electrode structure of the motor was modified, and very smooth motion was obtained.