gebhart/patrepeval huggingface dataset:
Sintering, Microstructure, and Properties of Submicrometre Cemented Carbides (1997)

AbstractThe effect of initial particle size on the sintering behaviour, microstructure, and physical and mechanical properties of submicrometre grain sized hardmetals manufactured from WC powders of different particle sizes (0·3 – 0·8 μ m) has been studied. The composition of the powders was WC–6Co with additions of VC and Cr3C2 grain growth inhibitors. The sintering was carried out in vacuum followed by hipping at 1380°C for 1 h. Ultrafine hardmetals exhibit substantially improved mechanical properties with a good combination of hardness, fracture toughness, and transverse rupture strength when hipping is applied after sintering. The finer the initial WC powder, the higher is the degree of shrinkage during the initial solid stage of densification. The analysis of sintering kinetics using dilatometric techniques showed that initial densification occurs by an interfacial diffusion mechanism in ultrafine powders as well as in regular powders, while the activation energy of the fine powders is considerably lower. The microstructure of sintered hardmetals is characterised by very fine grain size. A high volume fraction of direct WC–WC low angle and high angle grain boundaries with no Co interlayer was observed by scanning transmission electron microscopy/energy dispersive spectroscopy techniques. PM/0733
Surface roughness and scattering: papers from the first topical meeting (1993)

This is an introduction to the feature on surface roughness and scattering.
Wide field-of-view Talbot grid-based microscopy for multicolor fluorescence imaging (2013)

The capability to perform multicolor, wide field-of-view (FOV) fluorescence microscopy imaging is important in screening and pathology applications. We developed a microscopic slide-imaging system that can achieve multicolor, wide FOV, fluorescence imaging based on the Talbot effect. In this system, a light-spot grid generated by the Talbot effect illuminates the sample. By tilting the excitation beam, the Talbot-focused spot scans across the sample. The images are reconstructed by collecting the fluorescence emissions that correspond to each focused spot with a relay optics arrangement. The prototype system achieved an FOV of 12 × 10 mm(2) at an acquisition time as fast as 23 s for one fluorescence channel. The resolution is fundamentally limited by spot size, with a demonstrated full-width at half-maximum spot diameter of 1.2 μm. The prototype was used to nimage green fluorescent beads, double-stained human breast cancer SK-BR-3 cells, Giardia lamblia cysts, and the Cryptosporidium parvum oocysts. This imaging method is scalable and simple for implementation of high-speed wide FOV fluorescence microscopy.
Essential Role of Aspartokinase in L-Threonine Production by<i>Escherichia coli</i>W Mutants (1986)

We previously constructed an l-threonine-producing strain of E. coli W, KY8280, which is an Ile+ revertant of KY8279 which requires l-methionine, a,£-diaminopimelic acid and l-isoleucine [H. Kase et al., Agric. Biol. Chem., 35, 2089 (1971)]. From KY8280, another l-threonine-hyperproducing strain, KY8366, was obtained as an α-amino-β-hydroxy valeric acid (AHV, a threonine analog)-resistant mutant. Enzymatic analysis revealed that KY8280 constitutively expressed 8-fold higher l-threonine-sensitive aspartokinase I activity than KY8279. In addition, KY8366 constitutively expressed 13-fold higher l-lysine-sensitive aspartokinase III activity than KY8280. Such elevated levels of aspartokinases may contribute to the hyperproduction of l-threonine by these mutant strains. KY8366 produced 28 mg/ml of l-threonine in a culture medium fed with 12% glucose.
Beamforming adaptive arrays with graphics processing units (2017)

Beamforming is a signal processing technique by\nwhich an array of receivers sensitive to signals from all directions\ncan be processed to form one larger more sensitive receiver\nthat can identify which direction signals originate. Conventional\nbeamforming methods can allow signals from noisy interferers\nto mask signals of interest if these interferers lie close to\nthose directions to which the beamformer is sensitive. Adaptive\nbeamforming (ABF) attempts to overcome this by minimizing the\nbeamformer’s output subject to certain constraints. At its core\nABF is an optimization problem, and a robust ABF procedure\nthat consistently provides an optimal solution is computationally\nexpensive. Nevertheless, ABF is of particular interest to the US\nNavy, where personnel trained to analyze acoustic data from\nsonar receivers can locate and track quiet targets of interest, e.g.\nsubmarines, that may be masked by sources of both ambient and\ndirectional noise in the ocean.\nABF can be implemented to operate concurrently on sets of\nfrequency-independent data, thus making ABF well-suited for\nparallel processing. Additionally, due to ABF’s high density of\narithmetic operations, it is a suitable candidate for implementation\non modern graphics processing units (GPUs). GPUs have\nbeen designed to quickly perform many concurrent arithmetic\noperations on large amounts of data. Furthermore, as of early\n2007 they have reached a point at which they are not only capable\nof performing general-purpose tasks completely unrelated to\ngraphics but also can be programmed to do such tasks far more\neasily and more naturally than has previously been possible.\nI show a method for parallelizing an existing serial ABF\nalgorithm on an NVIDIA Geforce 8800 GTX, one of the first\nGPUs to use a generalized stream processor-based architecture. I\ntake a single program, multiple data (SPMD) approach where the\nsame software kernel executes over multiple blocks of frequencyindependent\ndata in parallel. Further parallelism is exploited\nby subdividing each block into smaller subsets, independent\nof the direction the array is steered, and operating on these\nconcurrently. Although initial results indicate that the GPU-based\nbeamformer yields lower throughput than its serial counterpart,\na number of possible optimizations are discussed that can allow\nthe GPU implementation to match, if not exceed, the serial\nimplementation.
Symbol by symbol APP decoding with a generalized Viterbi decoder (2003)

We discuss a symbol by symbol optimal a-posteriori probability (APP) decoding algorithm that only uses forward recursions. Originally, this algorithm was described for optimum soft-output detection for channels with ISI and is called the optimum soft-output algorithm (OSA). We have proven the convergence of the OSA and show that it is a generalization of the Viterbi algorithm.
Diastereoselective 1,2-addition of lithiated N-(trialkylsilyl)methylphenylsulfoximines to aldehydes: preparation of 1,4,3-oxathiazin-2(6H)-one 4-oxides as novel cyclic sulfoximines (1987)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiastereoselective 1,2-addition of lithiated N-(trialkylsilyl)methylphenylsulfoximines to aldehydes: preparation of 1,4,3-oxathiazin-2(6H)-one 4-oxides as novel cyclic sulfoximinesKi Jun Hwang, Eugene W. Logusch, Lawrence H. Brannigan, and Michael R. ThompsonCite this: J. Org. Chem. 1987, 52, 15, 3435–3441Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published inissue 1 July 1987https://pubs.acs.org/doi/10.1021/jo00391a049https://doi.org/10.1021/jo00391a049research-articleACS PublicationsRequest reuse permissionsArticle Views294Altmetric-Citations30LEARN 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
Cell delay variation in an ATM multiplexer (1997)

Abstract In this paper Cell Delay Variation (CDV) in an ATM multiplexer is investigated in the case where a Constant Bit Rate ( CBR ) traffic stream is mixed with a background traffic stream that arrives in the form of independent and identically distributed batches with general batch size distribution (Batch Bernoulli process). An exact Markovian solution approach is presented which gives the entries in the underlying transition matrix in closed form. In addition an approximate diffusion approach that is both computational simple and provides insight into the point process properties of the CBR stream after passing through the multiplexer is presented. It is demonstrated that the diffusion approximation has nice properties: it is second order exact in the heavy traffic case, and it provides fast and reasonable accuracy results over a wide range of system parameters.
Rapamycin increases oxidative stress response gene expression in adult stem cells (2012)

Balancing quiescence with proliferation is of paramount importance for adult stem cells in order to avoid hyperproliferation and cell depletion. In some models, stem cell exhaustion may be reversed with the drug rapamycin, which was shown can suppress cellular senescencein vitro and extend lifespan in animals. We hypothesized that rapamycin increases the expression of oxidative stress response genes in adult stem cells, and that these gene activities diminish with age. To test our hypothesis, we exposed mice to rapamycin and then examined the transcriptome of their spermatogonial stem cells (SSCs). Gene expression microarray analysis revealed that numerous oxidative stress response genes were upregulated upon rapamycin treatment, including superoxide dismutase 1, glutathione reductase, and delta-aminolevulinate dehydratase. When we examined the expression of these genes in 55-week-old wild type SSCs, their levels were significantly reduced compared to 3-week-old SSCs, suggesting that their downregulation is coincident with the aging process in adult stem cells. We conclude that rapamycin-induced stimulation of oxidative stress response genes may promote cellular longevity in SSCs, while a decline in gene expression in aged stem cells could reflect the SSCs' diminished potential to alleviate oxidative stress, a hallmark of aging.
Hardware architecture for matrix factorization in mimo receivers (2007)

This paper presents the hardware realization of the factorization algorithm required in a MIMO OFDM receiver to make the detection and decoding a non-orthogonal space-time code. Requirements of a real scenario represented by the standard IEEE 802.11n for WLAN have been analyzed and exploited to draw out the specifications of the proposed implementation. A very high throughput hardware realization has been obtained able to factorize 128 8x8 real channel matrices during the channel updating period of 28 μs, with a final throughput of 4,63 millions of matrices processed per second. Synthesis results on both 0.13 μm CMOS standard cell technology and FPGA compare favourably to previous implementations.
Sudbury neutrino observatory neutral current detector acquisition software overview (2004)

The Sudbury Neutrino Observatory begins a new phase of operation in the autumn of 2003 with the installation of the neutral current detectors (NCDs). This paper focuses mainly on the object-oriented real-time control and acquisition (ORCA) software that is the framework for the data acquisition system of the NCD array. Particular emphasis is given to the general purpose nature of ORCA and the manner in which it provides generic object-oriented software modules that can be configured and connected together at run-time to build general-purpose data acquisition applications. ORCA is the main graphical user interface for the NCD experiment and is used for hardware initialization, run control, data readout, and data shipping.
Trabajo sobre Consultoría Jurídica El Dictamen Legal (2010)

Este es el primero de los trabajos que con relacion al Dictamen Legal de una entidad, el autor se propone escribir partiendo de la idea de unificar y sistematizar, el trabajo de atencion a las personas juridicas que en estos momentos se lleva a cabo por las Consultorias del MINJUS, Consultorias Especializadas, la Organizacion Nacional de Bufetes Colectivos y otras Sociedades Civiles.
Treatment of cutaneous leishmaniasis with intralesional sodium stibogluconate (2009)

Intralesional SSG treatment is safe, effective and well tolerated with minimal side-effects.
Visual Analytics of Mobility and Transportation: State of the Art and Further Research Directions (2017)

Many cities and countries are now striving to create intelligent transportation systems that utilize the current abundance of multisource and multiform data related to the functionality and the use of transportation infrastructure to better support human mobility, interests, and lifestyles. Such intelligent transportation systems aim to provide novel services that can enable transportation consumers and managers to be better informed and make safer and more efficient use of the infrastructure. However, the transportation domain is characterized by both complex data and complex problems, which calls for visual analytics approaches. The science of visual analytics is continuing to develop principles, methods, and tools to enable synergistic work between humans and computers through interactive visual interfaces. Such interfaces support the unique capabilities of humans (such as the flexible application of prior knowledge and experiences, creative thinking, and insight) and couple these abilities with machines' computational strengths, enabling the generation of new knowledge from large and complex data. In this paper, we describe recent developments in visual analytics that are related to the study of movement and transportation systems and discuss how visual analytics can enable and improve the intelligent transportation systems of the future. We provide a survey of literature from the visual analytics domain and organize the survey with respect to the different types of transportation data, movement and its relationship to infrastructure and behavior, and modeling and planning. We conclude with lessons learned and future directions, including social transportation, recommender systems, and policy implications.
A canine-specific anti-nerve growth factor antibody alleviates pain and improves mobility and function in dogs with degenerative joint disease-associated pain (2015)

These pilot data demonstrate a positive analgesic effect of anti-NGF antibody in dogs suffering from chronic pain. The magnitude of the effect appeared identical to that expected with an NSAID.
Role of hydrophobic counteranions in the ion pair extraction of lanthanides(iii) with an electrically neutral extractant (2003)

The effect of a hydrophobic and weakly coordinate bonding anion, tetrakis[3,5-bis(trifluoromethyl)phenyl] borate (TFPB−), on the extraction of lanthanides(III) with an electrically neutral extractant, tetraoctyldiglycolamide (TODGA), has been examined. By adding H+TFPB−, the extraction of these metal ions is greatly enhanced; besides, the selectivity is also much improved. The metal extraction with TFPB− working as a counteranion is, formally, in a category of ion pair extraction, involving ion exchange of H+ paired with TFPB− for the metal ion. However, with such a hydrophobic anion, a peculiar phenomenon, which has never been seen in traditional ion pair extraction, occurs, i.e., the distribution ratio of a lanthanide(III) is only slightly dependent on the concentration of TODGA over a wide range, at least, from 5 × 10−4 to 0.4 M, or rather, it is somewhat decreased at high TODGA concentrations. This is, seemingly, against the general rule of solvent extraction, but can be explained coherently from the viewpoint of chemical equilibrium. Two ion pair extraction equilibria, one of which has the opposite sign to the other in the dependence of the distribution ratio of the metal on the concentration of TODGA, are postulated. The slight change in the metal distribution ratio over the wide range of the TODGA concentration is understood as a “buffer zone” occurring between the two different ion pair extraction equilibria with TFPB−.
Antibiotic release from an experimental biodegradable bone cement (1988)

An experimental biodegradable bone cement [poly(propylene fumarate)-methylmethacrylate] (PPF-MMA) has been compared in vivo with polymethylmethacrylate (PMMA) as a carrier agent for local release of antibiotics. This approach is potentially applicable to the treatment of chronic osteomyelitis where the clinical goal is to achieve sustained high concentrations of antibiotics locally in the infected bone. In our experiments, gentamicin- and vancomycin-impregnated cylindrical PMMA and PPF-MMA cement specimens were implanted subcutaneously in rats, and blood and wound fluid samples were obtained over a 2-week period. Antibiotic levels were determined using immunoassays, and microbiologic activity was confirmed with agar diffusion techniques. The biodegradable PPF-MMA cement achieved and maintained considerably higher wound antibiotic levels than did PMMA cement. Vancomycin levels for the PPF-MMA cement were greater than 20 times those for the PMMA cement at all sampling times from 24 h to 14 days. For both cements, the serum antibiotic concentrations remained safely below maximum levels recommended for parenteral therapy. Mechanical testing of the PPF-MMA cement showed that admixture of 3% by weight of antibiotic did not adversely affect material properties. We conclude that this experimental biodegradable bone cement (PPF-MMA) can be used as a carrier to achieve high sustained local levels and low serum levels of antibiotics. Because it is biodegradable and thus does not require a secondary procedure for removal, it has special potential for use in treatment of chronic osteomyelitis.
Dynamic mechanical analysis of pineapple leaf/glass hybrid fiber reinforced polyester composites (2009)

Abstract The dynamic mechanical properties of randomly oriented intimately mixed hybrid composites based on pineapple leaf fibers (PALF) and glass fibers (GF) in unsaturated polyester (PER) matrix were investigated. The PALFs have high‐specific strength and improve the mechanical properties of the PER matrix. In this study, the volume ratio of the two fibers was varied by incorporating small amounts of GF such as PALF/GF, 90/10, 80/20, 70/30, and 50/50, keeping the total fiber loading constant at 40 wt%. The dynamic modulus of the compositeswas found to increase on GF addition. The intimately mixed (IM) hybrid composites with PALF/GF, 80/20 (0.2 V f GF) showed highest E ′ values and least damping. Interestingly, the impact strength of the composites was minimum at this volume ratio. The composites with 0.46 V f GF or PALF/GF (50/50) showed maximum damping behavior and highest impact strength. The results were compared with hybrid composites of different layering patterns such as GPG (GF skin and PALF core) and PGP (PALF skin and GF core). IM and GPG hybrid composites are found more effective than PGP. The activation energy values for the relaxation processes in different composites were calculated. The overall results showed that hybridization with GF enhanced the performance properties. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers
Characterization of a petunia acetyltransferase involved in the biosynthesis of the floral volatile isoeugenol (2006)

Petunia flower petals emit large amounts of isoeugenol, which has been shown to be synthesized by isoeugenol synthase (PhIGS1) from an ester of coniferyl alcohol, hypothesized to be coniferyl acetate. This paper describes the identification and characterization of a novel petunia gene encoding an enzyme belonging to the BAHD acyltransferase family whose expression correlates with isoeugenol biosynthesis. RNAi suppression of this gene results in inhibition of isoeugenol biosynthesis. Biochemical characterization of the protein encoded by this gene showed that it has acetyltransferase activity and is most efficient with coniferyl alcohol among the alcohol substrates tested. Overall, these data support the conclusion that coniferyl acetate is the substrate of isoeugenol synthase.
Optical properties of columnar InAs quantum dots on InP for semiconductor optical amplifiers (2008)

Optical properties of polarization-controlled columnar quantum dots (QDs) grown by metalorganic vapor-phase epitaxy for semiconductor optical amplifier (SOA) applications are reported. The photoluminescence peak wavelength and polarization sensitivity depended on the time of AsH3 preflow before InAs growth as well as the InAs supply amount, and these changes in the optical properties are considered to be attributed to the change in the strain rather than the change in the height of the columnar QDs. Nearly polarization-insensitive QDs in the 1.5 μm region were obtained by 13-fold columnar QDs and finely controlling polarization of columnar-QD SOAs was demonstrated by changing barrier thickness by 0.05 ML steps.
Permanent-Magnet Coupled Power Inductor for Multiphase DC–DC Power Converters (2016)

Using a coupled power inductor (CPI) in a multiphase dc-dc power converter instead of using multiple single-phase power inductors (PIs) reduces the inductor size and achieves better steady state and transient performances. To further reduce the inductor size and weight used in multiphase power converters, this paper presents a two-phase CPI that utilizes a permanent magnet (PM) to achieve almost doubled saturation current with the same size or equivalently achieve significant size and weight reduction. Operation principle of the presented permanent magnet coupled power inductor (PMCI) and required PM dimensions are derived and used as a design guide. The three-dimensional physical model of the PMCI is developed by using ANSYS/Maxwell software package to “visualize” the saturation current doubling. The fabricated PMCI design, with specifications of 24 A/phase, ~4.25 μH/phase equivalent steady-state inductance, and ~2.3 μH equivalent transient inductance, is tested in a 4-8 V two-phase dc-dc boost power converter with up to 50 A input current. Results show that compared to a conventional CPI design with the same size, weight, and inductance, the fabricated PMCI almost doubles the saturation current (from 13 to 24 A/phase). Compared to another CPI with a larger size but with even a smaller saturation current (18 A/phase), the core volume of the PMCI is reduced to 51.9% and the core weight is reduced to 51.2%. In addition, the PMCI achieves ~76.3% core size and ~73.4% core weight reductions compared to two separate single-phase PIs with the same steady-state inductance and similar saturation current (~22 A) due to the dual flux cancelation effect from the coupling and PM realized by the presented PMCI structure.