gebhart/patrepeval huggingface dataset:
Contactless radio frequency probes for high‐temperature characterisation of microwave integrated circuits (2014)

The first ever demonstration of a viable contactless radio frequency (RF) probing technique at elevated temperatures is presented. The design utilises an inverted microstrip design for the probe, which is suspended over and placed in close proximity to the input/output microstrip lines of the device under test to couple signals in and out. To demonstrate the efficacy of the contactless RF probing technique, three example circuits, namely, a microstrip spurline bandstop filter, a microstrip pin diode series switch and a monolithic microwave integrated circuit amplifier mounted on a microstrip line were designed, fabricated and performance measured against temperature up to 200°C.
ChemInform Abstract: Polyaniline Nanofibers: A Unique Polymer Nanostructure for Versatile Applications (2009)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Audio-visual synchrony for detection of monologues in video archives (2003)

In this paper we present our approach to detect monologues in video shots. A monologue shot is defined as a shot containing a talking person in the video channel with the corresponding speech in the audio channel. Whilst motivated by the TREC 2002 video retrieval track (VT02), the underlying approach of synchrony between audio and video signals are also applicable for voice and face-based biometrics, assessing of lip-synchronization quality in movie editing, and for speaker localization in video. Our approach is envisioned as a two part scheme. We first detect occurrence of speech and face in a video shot. In shots containing both speech and a face, we distinguish monologue shots as those shots where the speech and facial movements are synchronized. To measure the synchrony between speech and facial movements we use a mutual-information based measure. Experiments with the VT02 corpus indicate that using synchrony, the average precision improves by more than 50% relative compared to using face and speech information alone. Our synchrony based monologue detector submission had the best average precision performance (in VT02) amongst 18 different submissions.
Mouse P450RAI (CYP26) Expression and Retinoic Acid-inducible Retinoic Acid Metabolism in F9 Cells Are Regulated by Retinoic Acid Receptor γ and Retinoid X Receptor α (1998)

We have cloned a mouse cDNA homolog of P450RAI, a cytochrome P450 belonging to a new family (CYP26), which has previously been isolated from zebrafish and human cDNAs and found to encode a retinoic acid-inducible retinoic acid hydroxylase activity. The cross-species conservation of the amino acid sequence is high, particularly between the mouse and the human enzymes, in which it is over 90%. Like its human and zibrafish counterparts, the mouse P450RAI cDNA catalyzes metabolism of retinoic acid into 4-OH-retinoic acid, 4-oxo-retinoic acid, 18-OH-retinoic acid, and unidentified water-soluble metabolites when transfected into COS-1 cells. Retinoic acid-inducible retinoic acid metabolism has previously been observed in F9 murine embryonal carcinoma cells and some derivatives lacking retinoid receptors. We were interested in determining whether P450RAI could be responsible for retinoic acid metabolism in F9 cells and in studying the effect of retinoid receptor ablation on P450RAI expression. In wild-type F9 cells and derivatives lacking RAR gamma, RAR alpha, and/or RXR alpha, we observed a direct relationship between the level of retinoic acid metabolic activity and retinoic acid-induced P450RAI mRNA. These experiments, as well as others using synthetic receptor subtype-specific retinoids, suggest that the RAR gamma and RXR alpha receptors mediate the effects of retinoic acid on the expression of the P450RAI gene.
Semiconductor-Type MEMS Gas Sensor for Real-Time Environmental Monitoring Applications (2013)

Low power consuming and highly responsive semiconductor-type microelectromechanical systems (MEMS) gas sensors are fabricated for real-time environmental monitoring applications. This subsystem is developed using a gas sensor module, a Bluetooth module, and a personal digital assistant (PDA) phone. The gas sensor module consists of a NO2 or CO gas sensor and signal processing chips. The MEMS gas sensor is composed of a microheater, a sensing electrode, and sensing material. Metal oxide nanopowder is drop-coated onto a substrate using a microheater and integrated into the gas sensor module. The change in resistance of the metal oxide nanopowder from exposure to oxidizing or deoxidizing gases is utilized as the principle mechanism of this gas sensor operation. The variation detected in the gas sensor module is transferred to the PDA phone by way of the Bluetooth module.
Semisynthesis and Biological Evaluation of Ganodermanontriol and Its Stereoisomeric Triols (2011)

The first synthesis of ganodermanontriol, a bioactive lanostane triterpene from the medicinal mushroom Ganoderma lucidum, has been achieved in 15.3% yield over nine steps, along with its three stereoisomeric triols and ganoderol A. The key steps leading to this family of isomers involve the reconstruction of the trisubstituted alkene by stereoselective and chemoselective phosphonate reactions and the formation of the unusual Δ7,9(11)-diene core by the mild acidic opening of a lanosterone-derived epoxide. Ganodermanontriol showed promising activity on the inhibition and proliferation of breast cancer cells. The effect of ganodermanontriol and its isomers on cell proliferation was assayed; IC50 values of 5.8 and 9.7 μM on breast cancer cell lines MCF-7 and MDA-MB-231, respectively, were found for ganodermanontriol.
Intracavity frequency doubling of an optically-pumped, external-cavity surface-emitting semiconductor laser (2001)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text W. J. Alford, T. D. Raymond, M. H. Crawford, and A. A. Allerman, "intracavity frequency doubling of an optically-pumped, external-cavity surface-emitting semiconductor laser," in Advanced Solid State Lasers, M. Fejer, H. Injeyan, and U. Keller, eds., Vol. 26 of OSA Trends in Optics and Photonics (Optica Publishing Group, 1999), paper MF6. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Industry survey of state of practice for helical piles and tiebacks (2014)

AbstractThe last 25 years have seen exponential growth in the use of helical piles and tiebacks. Helical piles and tiebacks are now considered a standard of practice in the deep foundation industry. With the dramatic growth of this technology and the proliferation of available technical information, a synthesis paper on the current state of the practice was considered a valuable addition to the literature as a way to quantify and summarize the current state-of-practice. Based on the increased interest and global applications of helical foundations, in 2013 the Helical Piles and Tiebacks Committee (HPTC) commissioned a state-of-practice survey of current practices in the use, design and installation of helical piles and tiebacks. The major goals of the survey were to understand the current status of applications of helical piles and tiebacks, their design and construction, quantify perceived needs and to identify future trends. The results for the present survey are very encouraging and have clearly demons...
Gas coupled laser acoustic detection for ultrasound inspection of composite materials (2000)

A novel laser based technique for the detection of ultrasound radiated from solid materials has been developed. In this approach, a probe beam is directed parallel to the surface of a sample. Ultrasonic waves in the solid are detected when an acoustic wave is radiated from the surface into the ambient air, where the density variations cause a beam deflection. Because the laser beam is not reflected from the sample surface, the technique is not dependent upon the surface optical properties of the material under investigation. It is particularly useful for testing graphite/polymer composites and other materials with poorly reflecting surfaces. Gas coupled laser acoustic detection (GCLAD) has been used to record well through transmission and surface acoustic waveforms in various materials. GCLAD has also been incorporated into a C-scanning system where it has been used to image subsurface discontinuities in graphite/polymer composite panels. Recent studies have investigated the inspection of curved surfaces. To this end, the flanges and corner of an angled graphite reinforced composite panel were scanned using this technique. In addition, the prospect of using surface acoustic waves (SAWs) for the interrogation of the skins on multi-layer materials has also been studied. Using GCLAD, Lamb, and Rayleighmore » waves have been detected in composites, polymers, thin metal films, and metal plates.« less
Hex-dominant mesh generation for basin modeling with complex geometry (2010)

Basin modeling aims to reconstruct the geological history of a basin and its oil system by means of fluid flow simulations, which is done by using a series of meshes describing basin geometry at each geological instant. These meshes are preferably hexahedral rather than tetrahedral in virtue for better numerical results. The basin can simply consist of geological layers delimited one from another by horizons. It can be geometrically complex with one or more faults interrupting the layers, which is barely studied but increasingly demanded. This paper exposes an automatic method which generates hex-dominant meshes for basin modeling with complex geometry. Firstly, based on their triangulations at the latest instant, 3D surface grids are generated with identical topology for all the horizons, and with some quadrilaterals being split across the diagonals to adapt to fault traces. Afterwards, all instants are iterated to generate corresponding meshes by firstly applying horizon and fault displacement on the mesh generated for precedent instant; the method then connects the bottom and top surface grids of the new layer along corresponding nodes, and splits certain cells along faults when necessary. Simulations have been carried out on generated meshes with satisfactory results.
Physicochemical properties of new solid urea-nitric phosphate fertilizers. 1. Products from nitric acid, phosphate rock, and urea (1988)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysicochemical properties of new solid urea-nitric phosphate fertilizers. 1. Products from nitric acid, phosphate rock, and ureaJack M. Sullivan, John H. Grinstead Jr., Yong K. Kim, and Kjell R. WaerstadCite this: Ind. Eng. Chem. Res. 1988, 27, 5, 851–857Publication Date (Print):May 1, 1988Publication History Published online1 May 2002Published inissue 1 May 1988https://pubs.acs.org/doi/10.1021/ie00077a023https://doi.org/10.1021/ie00077a023research-articleACS PublicationsRequest reuse permissionsArticle Views63Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
New synchronization schemes for UWB systems (2009)

This paper addresses the decision rules for synchronization in ultra-wideband (UWB) systems. The conventional decision rule cannot guarantee a good performance in receiver operations such as detection and decoding after the synchronization. To solve this problem, in this paper, we propose new decision rules for synchronization in UWB systems. We first derive an optimal decision rule based on the maximum likelihood (ML) criterion and then a simpler suboptimal decision rule. Simulation results show that the proposed decision rules have better synchronization performance than the conventional decision rule.
Co-channel interference cancellation for HDTV receivers (1999)

A new method of co-channel interference rejection for digital television receivers is presented that uses a different rejection filter from the comb filter that was used in the prototype built by Zenith. This filter is optimized for rejection of co-channel NTSC interference in the presence of white noise and hence suffers a penalty of only 0.4 dB in AWGN as compared to 3.5 dB with the comb. The receiver structure with this filter, including required equalizer and trellis decoder modifications is presented, along with simulation results showing the improvement in performance in co-channel-plus-AWGN interference and hence in coverage area.
Iron Stabilization with Phytic Acid in Model Wine and Wine (2010)

When present in high concentrations in wine and other beverages, polyvalent metal cations such as iron may cause objectionable sensory and physicochemical properties including metallic taste, discoloration, oxidative changes, and formation of haze and cloudiness. Reducing metal concentrations in beverages, especially wines, has long been desirable. In this investigation, phytic acid was added to red, white, or model wine to chelate polyvalent iron cations in a phytic acid to iron molar ratio of 1:1, which corresponds to 0.018 mM phytic acid or 11.8 mg/L phytic acid for each 1 mg/L iron present. A calcium salt was then added to coprecipitate the complex quantitatively, at a calcium to phytic acid molar ratio of 5:1, which corresponds to 9.0 mg/L CaCO<sub>3</sub> for each 1 mg/L iron subsequently removed by filtration. The method removes excessive iron in wine, sparkling wine, and other beverages and overcomes the problems of alternative methods; for example, it binds iron to the most complete extent possible, produces no toxic products even with overclarification, and acts selectively on iron and calcium ions but not on copper or potassium ions. Color and phenolic attributes were measured spectrophotometrically and were not greatly affected by phytic acid and calcium carbonate treatments. Titratable acidity and pH were slightly changed after treatment; however, such changes could likely be diminished with further work.
2,3,7,8,12,13,17,18-Octafluoro-5,10,15,20-tetraarylporphyrins and Their Zinc Complexes:  First Spectroscopic, Electrochemical, and Structural Characterization of a Perfluorinated Tetraarylmetalloporphyrin (1997)

We report a convenient and general synthesis of β-octafluoroporphyrins bearing meso-tetraaryl substituents, including the first synthesis and full characterization of a perfluorinated tetraarylporphyrin, perfluoro-5,10,15,20-tetraphenylporphyrin, 2. The structural, spectroscopic, and electrochemical data indicate that β-octafluoro-meso-tetraarylporphyrins are a new class of planar, electron-deficient ligands. Particularly impressive is the 0.5 V window over which the formal oxidation potential can be tuned using only aryl substituents. The invariance of the ligand structure with increasingly positive formal oxidation potential is a key advance; electronic effects have been severed from the nonplanar conformations exhibited by all other highly electron-deficient porphyrins.
Protein Kinase C and Acute Respiratory Distress Syndrome (2013)

The acute respiratory distress syndrome (ARDS) is a major public health problem and a leading source of morbidity in intensive care units. Lung tissue in patients with ARDS is characterized by inflammation, with exuberant neutrophil infiltration, activation, and degranulation that is thought to initiate tissue injury through the release of proteases and oxygen radicals. Treatment of ARDS is supportive primarily because the underlying pathophysiology is poorly understood. This gap in knowledge must be addressed to identify urgently needed therapies. Recent research efforts in anti-inflammatory drug development have focused on identifying common control points in multiple signaling pathways. The protein kinase C (PKC) serine-threonine kinases are master regulators of proinflammatory signaling hubs, making them attractive therapeutic targets. Pharmacological inhibition of broad-spectrum PKC activity and, more importantly, of specific PKC isoforms (as well as deletion of PKCs in mice) exerts protective effects in various experimental models of lung injury. Furthermore, PKC isoforms have been implicated in inflammatory processes that may be involved in the pathophysiologic changes that result in ARDS, including activation of innate immune and endothelial cells, neutrophil trafficking to the lung, regulation of alveolar epithelial barrier functions, and control of neutrophil proinflammatory and prosurvival signaling. This review focuses on the mechanistic involvement of PKC isoforms in the pathogenesis of ARDS and highlights the potential of developing new therapeutic paradigms based on the selective inhibition (or activation) of specific PKC isoforms.
PPG Sensor Contact Pressure Should Be Taken Into Account for Cuff-Less Blood Pressure Measurement (2020)

This study suggests that widely pursued PPG-based BP measurement devices including those that detect PTT should maintain the CP or include a CP measurement in the calibration equation for deriving BP.
Cloning of the late genes in the ergosterol biosynthetic pathway of<i>Saccharomyces cerevisiae</i>—A review (1995)

Research on the ergosterol biosynthetic pathway in fungi has focused on the identification of the specific sterol structure required for normal membrane structure and function and for completion of the cell cycle. The pathway and its end product are also the targets for a number of antifungal drugs. Identification of essential steps in ergo-sterol biosynthesis could provide new targets for the development of novel therapeutic agents. Nine of the eleven genes in the portion of the pathway committed exclusively to ergosterol biosynthesis have been cloned, and their essentiality for aerobic growth has been determined. The first three genes, ERG9 (squalene synthase), ERG1 (squalene epoxidase), and ERG7 (lanosterol synthase), have been cloned and found to be essential for aerobic viability since their absence would result in the cell being unable to synthesize a sterol molecule. The remaining eight genes encode enzymes which metabolize the first sterol, lanosterol, to ultimately form ergosterol. The two earliest genes, ERG11 (lanosterol demethylase) and ERG24 (C-14 reductase), have been cloned and found to be essential for aerobic growth but are suppressed by mutations in the C-5 desaturase (ERG3) gene and fen1 and fen2 mutations, respectively. The remaining cloned genes, ERG6 (C-24 methylase), ERG2 (D8AE7 isomerase), ERG3 (C-5 desaturase), and ERG4 (C-24(28) reductase), have been found to be nonessential. The remaining genes not yet cloned are the C-4 demethylase and the C-22 desaturase (ERG5).
Hydrogel Nanoparticle Harvesting of Plasma or Urine for Detecting Low Abundance Proteins (2014)

Novel biomarker discovery plays a crucial role in providing more sensitive and specific disease detection. Unfortunately many low-abundance biomarkers that exist in biological fluids cannot be easily detected with mass spectrometry or immunoassays because they are present in very low concentration, are labile, and are often masked by high-abundance proteins such as albumin or immunoglobulin. Bait containing poly(N-isopropylacrylamide) (NIPAm) based nanoparticles are able to overcome these physiological barriers. In one step they are able to capture, concentrate and preserve biomarkers from body fluids. Low-molecular weight analytes enter the core of the nanoparticle and are captured by different organic chemical dyes, which act as high affinity protein baits. The nanoparticles are able to concentrate the proteins of interest by several orders of magnitude. This concentration factor is sufficient to increase the protein level such that the proteins are within the detection limit of current mass spectrometers, western blotting, and immunoassays. Nanoparticles can be incubated with a plethora of biological fluids and they are able to greatly enrich the concentration of low-molecular weight proteins and peptides while excluding albumin and other high-molecular weight proteins. Our data show that a 10,000 fold amplification in the concentration of a particular analyte can be achieved, enabling mass spectrometry and immunoassays to detect previously undetectable biomarkers.
Differences in Surface Expression of NspA among<i>Neisseria meningitidis</i>Group B Strains (1999)

NspA is a highly conserved membrane protein that is reported to elicit protective antibody responses against Neisseria meningitidis serogroups A, B and C in mice (D. Martin, N. Cadieux, J. Hanel, and B. R. Brodeur, J. Exp. Med. 185:1173-1183, 1997). To investigate the vaccine potential of NspA, we produced mouse anti-recombinant NspA (rNspA) antisera, which were used to evaluate the accessibility of NspA epitopes on the surface of different serogroup B strains by an immunofluorescence flow cytometric assay and by susceptibility to antibody-dependent, complement-mediated bacteriolysis. Among 17 genetically diverse strains tested, 11 (65%) were positive for NspA cell surface epitopes and 6 (35%) were negative. All six negative strains also were resistant to bactericidal activity induced by the anti-rNspA antiserum. In contrast, of the 11 NspA surface-positive strains, 8 (73%; P < 0.05) were killed by the antiserum and complement. In infant rats challenged with one of these eight strains, the anti-rNspA antiserum conferred protection against bacteremia, whereas the antiserum failed to protect rats challenged by one of the six NspA cell surface-negative strains. Neither NspA expression nor protein sequence accounted for differences in NspA surface accessibility, since all six negative strains expressed NspA in outer membrane preparations and since their predicted NspA amino acid sequences were 99 to 100% identical to those of three representative positive strains. However, the six NspA cell surface-negative strains produced, on average, larger amounts of group B polysaccharide than did the 11 positive strains (reciprocal geometric mean titers, 676 and 224, respectively; P < 0.05), which suggests that the capsule may limit the accessibility of NspA surface epitopes. Given these strain differences in NspA surface accessibility, an rNspA-based meningococcal B vaccine may have to be supplemented by additional antigens.
Full Spectrum Photoluminescence Lifetime Analyses on Silicon Bricks (2013)

Bulk lifetime and doping images on silicon bricks can be obtained by spectral luminescence intensity ratio analysis as established recently. Here, we report on calibrated full spectrum band-to-band luminescence measurements taken on the flat side faces of mono- and multicrystalline silicon bricks at room temperature. Our results verify the physical modeling used for the spectral intensity ratio imaging. We further investigate three fitting methods employing spectrally resolved photoluminescence data to obtain bulk lifetime information.