gebhart/patrepeval huggingface dataset:
Formation of fullerenes in highly concentrated solar flux (1993)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of fullerenes in highly concentrated solar fluxC. L. Fields, J. R. Pitts, M. J. Hale, C. Bingham, A. Lewandowski, and D. E. KingCite this: J. Phys. Chem. 1993, 97, 34, 8701–8702Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 August 1993https://pubs.acs.org/doi/10.1021/j100136a008https://doi.org/10.1021/j100136a008research-articleACS PublicationsRequest reuse permissionsArticle Views146Altmetric-Citations66LEARN 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 options Get e-Alerts
Local Feature Extraction Using Scale-Space Decomposition (2004)

In our recent work we have introduced a framework for extracting features from solid of mechanical artifacts in polyhedral representation based on scale-space feature decomposition [1]. Our approach used recent developments in efficient hierarchical decomposition of metric data using its spectral properties. In that work, through spectral decomposition, we were able to reduce the problem of matching to that of computing a mapping and distance measure between vertex-labeled rooted trees. This work discusses how Scale-Space decomposition frame-work could be extended to extract features from CAD models in polyhedral representation in terms of surface triangulation. First, we give an overview of the Scale-Space decomposition approach that is used to extract these features. Second, we discuss the performance of the technique used to extract features from CAD data in polyhedral representation. Third, we show the feature extraction process on noisy data — CAD models that were constructed using a 3D scanner. Finally, we conclude with discussion of future work.
Evaluation of the clinical efficacy of a TW3-based fully automated bone age assessment system using deep neural networks (2020)

This TW3-based system can be effectively used for bone age assessment based on hand-wrist radiographs of Korean children and adolescents.
A wide-tuning-range and reduced-fractional-spurs synthesizer combining &#x03A3;-&#x0394; fractional-N and integer Flying-Adder techniques (2009)

A frequency synthesizer architecture with a wide tuning range and reduced fractional spurs is presented. The proposed topology includes a Σ-Δ fractional-N synthesizer and an integer Flying-Adder architecture. Compared to the conventional Σ-Δ fractional-N frequency synthesizer, this approach has much wider tuning range. Compared to the fractional Flying-Adder frequency synthesizer, the proposed approach can achieve the same frequency resolution with reduced fractional spurs and alleviates the constraints on the adder design in the Flying-Adder architecture.
Development of Highly Fluid, Concentrated and Stable Fluorocarbon Emulsions for Diagnosis and Therapy (1992)

A challenging aim in developing injectable fluorocarbon emulsions is to combine good flow characteristics (especially at low shear rates) with the high fluorocarbon concentration required for high oxygen delivery or effective contrast in imaging, long shelf life, and biological acceptability. A good balance of these sometimes conflicting objectives has been achieved with 90% w/v concentrated emulsions of various fluorocarbons, including the radiopaque oxygen carrier perfluorooctylbromide (PFOB, perflubron). The sterile emulsions have viscosities of about 20 cPs at a shear rate of 1 sec−1; the viscosity decreases rapidly with fluorocarbon concentration, and at 60% w/v the viscosity is less than that of human blood. The emulsions are suitable for injection as prepared, and are stable unfrozen for over a year.
HMM based online handwriting recognition (1996)

Hidden Markov model (HMM) based recognition of handwriting is now quite common, but the incorporation of HMM's into a complex stochastic language model for handwriting recognition is still in its infancy. We have taken advantage of developments in the speech processing field to build a more sophisticated handwriting recognition system. The pattern elements of the handwriting model are subcharacter stroke types modeled by HMMs. These HMMs are concatenated to form letter models, which are further embedded in a stochastic language model. In addition to better language modeling, we introduce new handwriting recognition features of various kinds. Some of these features have invariance properties, and some are segmental, covering a larger region of the input pattern. We have achieved a writer independent recognition rate of 94.5% on 3,823 unconstrained handwritten word samples from 18 writers covering a 32 word vocabulary.
Conceptually New Sulfone Analogues of the Hormone 1α,25-Dihydroxyvitamin D<sub>3</sub>:  Synthesis and Preliminary Biological Evaluation (1999)

A conceptually new series of vitamin D(3)-like nonfluorinated and fluorinated 16-ene side chain tert-butyl sulfones 3-7 has been synthesized. Even though these novel C,D-ring side chain analogues of the hormone 1alpha,25-dihydroxyvitamin D(3) (1,1,25D(3)) lack a terminal OH group, thought previously to be essential for high biological activity, they are highly antiproliferative and, in several cases, transcriptionally active in vitro but desirably noncalcemic in vivo. The side chain sulfone group may be binding to the nVDR as a hydrogen-bond acceptor, in contrast to the hydrogen-bond donor function of the 25-OH group of natural 1,25D(3).
Semiochemical (Patent CA 2388964 A1) (2001)

cis-Jasmone has been discovered to be useful as a semiochemical that changes the behaviour of insects and/or the physiology of plants. It has direct signalling roles with plant-feeding aphids, in attraction of aphid predators and parasitoids, and may act as an airborne signal inducing production of volatile plant semiochemicals, including the monoterpene (E)-.beta.-ocimene, that stimulate foraging by parasitoids. It is an extremely benign compound having, to human beings, a pleasant aroma and gives a long-lasting effect after removal of the stimulus.
Pillars formed by laser ablation and modified by wet etching (2007)

Studies on surface texturing by chemically enhanced laser ablation in a variety of materials, particularly silicon and germanium are reported. The materials are exposed either to femtosecond or nanosecond laser irradiation in a variety of vacuum or gaseous environments including air, He, sulfur hexafluoride (SF<sub>6</sub>) or hydrogen chloride (HCl). The dynamics of pillar formation are elucidated and it is shown that the mechanisms are very different in these two pulse length regimes. Surface texturing responds to the combined effects of laser assisted chemical etching and laser ablation. Various processing steps either before or after laser irradiation allow us to modify the nature of the pillars that are formed. In this way we can make ordered arrays that extend over ≥1 cm<sup>2</sup> in just a few minutes of laser exposure. Post-laser processing wet etching can produce Si pillars that are over 50 &mgr;m long with tips that are only 10 nm across as well as macroporous silicon with crystallographically defined pores. A process we call solidification driven extrusion creates nanoscale spikes atop the pillars under certain circumstances - a process that is more prevalent for Ge than Si. Pillar-covered surfaces of Si and Ge are black; that is, they exhibit very low reflectivity. For Si this low reflectivity extends to wavelengths far below the band gap raising the possibility that we may be able to make other transparent materials highly absorptive by laser texturing.
RNA Interference and MicroRNA Modulation for the Treatment of Cardiac Disorders (2008)

The current status and challenges of RNA interference (RNAi) and microRNA modulation strategies for the treatment of myocardial disorders are discussed and related to the classical gene therapeutic approaches of the past decade. Section 2 summarizes the key issues of current vector technologies which determine if they may be suitable for clinical translation of experimental RNAi or microRNA therapeutic protocols. We then present and discuss examples dealing with the potential of cardiac RNAi therapy. First, an approach to block a key early step in the pathogenesis of a virus-induced cardiomyopathy by RNAi targeting of a cellular receptor for cardiopathogenic viruses (Section 3). Second, an approach to improve cardiac function by RNAi targeting of late pathway of heart failure pathogenesis common to myocardial disorders of multiple etiologies. This strategy is directed at myocardial Ca2+ homeostasis which is disturbed in heart failure due to coronary heart disease, heart valve dysfunction, cardiac inflammation, or genetic defects (Section 4). Whereas the first type of strategies (directed at early pathogenesis) need to be tailor-made for each different type of pathomechanism, the second type (targeting late common pathways) has a much broader range of application. This advantage of the second type of approaches is of key importance since enormous efforts need to be undertaken before any regulatory RNA therapy enters the stage of possible clinical translation. If then the number of patients eligible for this protocol is large, the actual transformation of the experimental therapy into a new therapeutic option of clinical importance is far more likely to occur.
Synthesis and Antituberculosis Activity of a Novel Series of Optically Active 6-Nitro-2,3-dihydroimidazo[2,1-<i>b</i>]oxazoles (2006)

In an effort to develop potent new antituberculosis agents that would be effective against both drug-susceptible and drug-resistant strains of Mycobacterium tuberculosis, we prepared a novel series of optically active 6-nitro-2,3-dihydroimidazo[2,1-b]oxazoles substituted at the 2-position with various phenoxymethyl groups and a methyl group and investigated the in vitro and in vivo activity of these compounds. Several of these derivatives showed potent in vitro and in vivo activity, and compound 19 (OPC-67683) in particular displayed excellent in vitro activity against both drug-susceptible and drug-resistant strains of M. tuberculosis H37Rv (MIC = 0.006 microg/mL) and dose-dependent and significant in vivo efficacy at lower oral doses than rifampicin in mouse models infected with M. tuberculosis Kurono. The synthesis and structure-activity relationships of these new compounds are presented.
Targeting <i>Loxosceles</i> spider Sphingomyelinase D with small-molecule inhibitors as a potential therapeutic approach for loxoscelism (2019)

Loxosceles spiders' venoms consist of a mixture of proteins, including the sphingomyelinases D (SMases D), which are the main toxic components responsible for local and systemic effects in human envenomation. Herein, based on the structural information of SMase D from Loxosceles laeta spider venom and virtual docking-based screening approach, three benzene sulphonate compounds (named 1, 5 and 6) were identified as potential Loxosceles SMase D inhibitors. All compounds inhibited the hydrolysis of the sphingomyelin substrate by both recombinant and native SMases D. Compounds 5 and 6 acted as SMases D uncompetitive inhibitors with Ki values of 0.49 µM and 0.59 µM, respectively. Compound 1 is a mixed type inhibitor, and presented a Ki value of 0.54 µM. In addition, the three compounds inhibited the binding of SMases D to human erythrocytes and the removal of glycophorin C from the cell surface, which are important events in the complement-dependent haemolysis induced by Loxosceles venom. Moreover, compounds 5 and 6 reduced the binding of SMases to human keratinocytes membrane and the venom induced cell death. Importantly, compounds 5 and 6 also controlled the development of the necrotic lesion in an in vivo model of loxoscelism. Together, our findings indicate that the novel SMase D inhibitors presented here are able to suppress both local and systemic reactions induced by Loxosceles venoms. Since the number of Loxosceles envenomation accidents is currently growing worldwide, our results indicate that both inhibitors are promising scaffolds for the rational design of new drugs targeting SMases D from these spiders.
Origami Quadrifilar Helix Antenna in UHF band (2014)

This paper presents an origami Quadrifilar Helix Antenna (QHA) which could work at different operating frequencies in Ultra High Frequency (UHF) band with different heights for optimum realized gain. This antenna is designed to be applied to space wireless communication with little limitations of storage or transportation due to a compact size. Principle of this design was first validated by the ideal helix antenna model. The simulated frequency reconfigurability of QHA is up to 1.92 GHz, and the height of the folded state is 26% of the height of the unfolded state.
Cable Routing in MRI Phase Array Coils (2003)

A method of routing RF cables along low electric field areas of a local coil in a predictable and reliable manner is presented. A conductive ring is introduced into proximity with the coil loops and connected to the ground shield of the RF cables creating a low electric field area. The RF cables are attached to the conductor along the ring to a point where they exit together as a unified cable. The ring, by defining an area of low electromagnetic field, reduces interference on the cables and coupling between loops allowing for a controlled cable layout.
Realtime estimation of human hand posture for robot hand control (2005)

The authors propose a system for searching the shape of human hands and fingers in real time and with high accuracy, without using any special peripheral equipment such as range sensor, PC cluster, etc., by a method of retrieving similar image quickly with high accuracy from a large volume of image database containing the complicated shapes and self-occlusions. In designing the system, we constructed a database in a way to be adaptable even to differences among individuals, and searched CG images of hand similar to unknown hand image, through extraction of characteristics using high-order local autocorrelational patterns, reduction of the amount of characteristics centering on principal component analysis, and prior rearrangement of data corresponding to the amount of characteristics. As a result of experiments, our system performed high-accuracy estimation of human hand shape where mean error was 7 degrees in finger joint angles, with the processing speed of 30 fps or over.
Dispersion-casting thin and ultrathin fabric-reinforced silicone rubber membrane for use in the membrane lung. (1975)

Pinholes in thin silicone rubber membrane have previously been traced to undispersed silica filer aggregates within the silicone rubber. This was overcome by centrifuging the dispersion to remove the aggregates prior to membrane fabrication. Thin (less than 75 mu) and ultra-thin (less than 25 mum) membrane could then be dispersion-cast. To facilitate handling and to increase mixing of blood in the membrane lung, it is often desirable to reinforce the silicone rubber membrane with fabric. Unfortunately, this process frequently introduces pinholes of its own. We have found than pinhole-free fabric-reinforced silicone rubber membrane can consistently be produced by the double-layer casting technique. First, the dispersion is cast onto aluminum foil, solvent evaporated, and partially cured. A second layer is next cast on top of it, followed by fabric. After solvent evaporation, final cure is under nitrogen using organic peroxide catalysts. This technique has permitted us to consistently cast strong pinhole-free membranes as thin as 9 mu.
A bifunctional enzyme (delta 1-pyrroline-5-carboxylate synthetase) catalyzes the first two steps in proline biosynthesis in plants. (1992)

Many plants synthesize and accumulate proline in response to osmotic stress. Despite the importance of this pathway, however, the exact metabolic route and enzymes involved in the synthesis of proline in plants have not been unequivocally identified. We report here the isolation of a mothbean (Vigna aconitifolia) cDNA clone encoding a bifunctional enzyme, delta 1-pyrroline-5-carboxylate synthetase (P5CS), with both gamma-glutamyl kinase and glutamic-gamma-semialdehyde dehydrogenase activities that catalyzes the first two steps in proline biosynthesis. The two enzymatic domains of P5CS correspond to the ProB and ProA proteins of Escherichia coli and contain a leucine zipper in each domain, which may facilitate inter- or intramolecular interaction of this protein. The Vigna P5CS enzyme activity is feedback regulated by proline but is less sensitive to end-product inhibition than is the E. coli gamma-glutamyl kinase. The P5CS gene is expressed at high levels in Vigna leaves and is inducible in roots subjected to salt stress, suggesting that P5CS plays a key role in proline biosynthesis, leading to osmoregulation in plants.
Design and verification of a novel multi-RC-triggered power clamp circuit for on-chip ESD protection (2013)

A novel multi-RC-triggered power clamp circuit is proposed in this paper. Effective capacitances of capacitors are multiplied by current mirrors and a modified asymmetric phase inverter is employed in the proposed circuit. Simulation and test results verify that the proposed circuit maintains enhanced ESD protection robustness with reduced chip-area.
Preparation of Monoclonal Antibodies against a Glycolipid Asialo GM1 (1987)

Five IgM monoclonal antibodies (MAbs), MW-1, MW-2, MW-3, MW-4, and MW-5, against a glycolipid asialo GM1 were prepared from hybridoma clones obtained by the fusion of mouse NS-1 myeloma cells with spleen cells from a mouse immunized with asialo GM1 adsorbed to naked Salmonella. All the MAbs reacted only with asialo GM1 when their reactivities were examined by enzyme-linked immunosorbent assay (ELISA) and thin-layer chromatography (TLC)-immunostaining using structurally related glycolipids. The MAbs showed a complement-dependent lysis of mouse natural killer (NK) cells, but the lytic activities were weaker than that of a rabbit polyclonal anti-asialo GM1 antibody. When they were mixed, the anti-NK activity was increased to a level almost comparable to that of the polyclonal antibody. These results suggest that all the MAbs obtained are specific for asialo GM1 and that they may be different in fine specificity for the glycolipid. Significance of the MAbs in immunological and neurochemical studies is discussed.
Microstructure and Sintering Mechanism of TiB<sub>2</sub>-ZrO<sub>2</sub>-SiC Composite (1992)

A ceramic TiB2-20wt% (2mol% Y2O3-ZrO2) composite has a high three-point bending strength of 1200MPa. However, this composite lacks sinterability, so that glass encapsulation HIP'ing is required to obtain a full dense sintered compact. However, addition of 2.5-5.0wt% SiC improved the sinterability drastically. TiB2-19.5wt% (2mol% Y2O3-ZrO2)-2.5wt%SiC was densified to 96% of its theoretical density by vacuum sintering at 1700°C for 14.4ks, and this sintered compact was hot isostatically pressed (HIP'ed) without glass encapsulation. In this work, the microstructure and sintering mechanism of TiB2-19-19.5wt% (2mol% Y2O3-ZrO2)-2.5-5.0wt% SiC were investigated. TiB2-19-19.5wt% (2mol% Y2O3-ZrO2)-2.5-5.0wt% SiC was densified drastically above 1600°C. TiB2-1.0-10.0wt% SiC had the same sinterability as TiB2-19-19.5wt% (2mol%Y2O3-ZrO2)-2.5-5.0wt% SiC. Therefore, SiC improved the sinterability of TiB2, regardless of the presence of ZrO2. The microstructure of HIP'ed compacts was observed with a SEM and a TEM. Enriched areas of SiC were not observed with the SEM. However, TEM observation showed that thin strip-like grain boundary phases consisting of Ti, Si and Zr exist between grain boundaries of TiB2 and ZrO2, and that (Ti, Zr)5Si3 exists at the triple points of grain boundaries. These grain boundary phases were formed by the reaction among SiC, Ti, and Zr. These were entirely or partially liquid phase at the sintering temperature of 1700°C. As a result, TiB2-19-19.5wt% (2mol% Y2O3-ZrO2)-2.5-5.0wt% SiC was densified by liquid phases sintering, which was the main mechanism in which sinterability was improved by the addition of SiC.
Precision Alignment Procedure for Troposcatter Systems. (1976)

This report contains a detailed investigation of a new approach to accomplishing alignment of troposcatter communications antennas along the great circle path. The new approach is based upon examination of the received CW signals doppler spectrum shape and its relation to antenna pointing angle. The doppler spectrum shape was examined through forming the cross-correlation function of the quadrature components of the received signal. Available experimental evidence suggests an alignment accuracy of + or - 1/8 deg. in less than one hour is attainable. (Author)
Sucrose-based epoxy monomers and their reactions with diethylenetriamine (1998)

Two sets of sucrose-based epoxy monomers, namely, epoxy allyl sucroses (EAS), and epoxy crotyl sucroses (ECS), were prepared by epoxidation of octa-O-allyl and octa-O-crotyl sucroses (OAS and OCS, respectively). Synthetic and structural characterization studies showed that the new epoxy monomers were mixtures of structural isomers and diastereoisomers that contained varying numbers of epoxy groups per sucrose. EAS and ECS can be tailored to contain an average of one to eight epoxy groups per sucrose. Quantitative 13C-NMR spectrometry and titrimetry were used independently to confirm the average number of epoxy groups per sucrose. Sucrose-based epoxy monomers were cured with diethylenetriamine (DETA) in a differential scanning calorimeter (DSC), and their curing characteristics were compared with those of diglycidyl ether of bisphenol A (DGEBA) and diepoxycrotyl ether of bisphenol A (DECEBA). EAS and DGEBA cured at 100 to 125°C and exhibited a heat of cure of about 108.8 kJ per mol epoxy. ECS and DECEBA cured at 150 and 171°C, respectively, and exhibited a heat of cure of about 83.7 kJ per mol epoxy. Depending upon the degree of epoxidation (average number of epoxy groups per sucrose) and the concentration of DETA, glass transition temperatures (Tgs) of cured EAS varied from −17 to 72°C. DETA-cured ECS containing an average of 7.3 epoxy groups per sucrose (ECS-7.3) showed no DSC glass transition between −140 and 220°C when the ratio of amine (NH) to epoxy group was 1:1 and 1.5:1. Maximum Tgs obtained for DETA-cured DGEBA and DECEBA polymers were 134 and 106°C, respectively. DETA-cured bisphenol A-based epoxy polymers degraded at about 340°C, as observed by thermogravimetric analysis (TGA). DETA-cured sucrose-based epoxy polymers degraded at about 320°C. Sucrose-based epoxies cured with DETA were found to bind aluminum, glass, and steel. Comparative lap shear tests (ASTM D1002–94) showed that DETA-cured epoxy allyl sucroses with an average of 3.2 epoxy groups per sucrose (EAS-3.2) generated a flexible adhesive comparable in bond strength to DGEBA. However, DETA-cured ECS-7.3 outperformed the bonding characteristics of both DGEBA and EAS-3.2. All sucrose-based epoxy polymers were crosslinked and insoluble in water, N,N-dimethylformamide, tetrahydrofuran, acetone, and dichloromethane. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. A Polym. Chem. 36: 2397–2413, 1998