gebhart/patrepeval huggingface dataset:
Dielectric properties of crystalline and amorphous transition metal oxides and silicates as potential high-κ candidates: the contribution of density-functional theory (2005)

A review is given of various first-principles studies of the dielectric properties of crystalline and amorphous transition metal oxides and silicates, which have drawn considerable attention as potential high-kappa materials. After a brief summary of the principal equations of density-functional theory related to the dielectric properties of solids, the results obtained for group IVb M = (Hf, Zr, Ti) and IIIb M = (Y, La, Lu) transition metals crystalline oxides and/or silicates are discussed.\nFor the group IVb transition metals, four crystalline phases (cubic, tetragonal, monoclinic and rutile) of dioxide MO2 with M = (Hf, Zr, Ti) have been considered in the literature. The results of density-functional theory calculations of the dielectric properties of three crystalline transition metal silicates (hafnon HfSiO4, zircon ZrSiO4 and a hypothetical TiSiO4 structure) are also presented. For the group IIIb transition metals, two crystalline phases (cubic and hexagonal) of sesquioxides M2O3 with M = Lu have been investigated within density-functional theory.\nFinally, the first-principles results that have been obtained for the amorphous silicates are discussed. A presentation is given of a scheme recently introduced which relates the dielectric constants to the local bonding of Si and metal atoms. It is based on the definition of parameters characteristic of the basic structural units centred on Si and metals atoms and including their nearest O neighbours. Applied to amorphous Zr silicates, it provides a good description of the measured dielectric constants, both of the optical and the static ones.
Preparation of High-T<sub>c</sub> Superconducting Bi-Ca-Sr-Cu-O Ceramics by the Melt Quenching Method (1988)

Superconducting Bi-Ca-Sr-Cu-O ceramics with T c (onset)=102 K and T c (zero)=92 K were prepared by a melt quenching method, in which the melt of nominal composition BiCaSrCu 2 O x was first quenched and then annealed at 800∼850°C for 24 h in oxygen atmosphere. It was found that the rapidly cooled samples after annealing show high T c and sharp superconducting transition, but the samples slowly cooled in the furnace after annealing show low T c and broad transition with a tail. The critical current density at 77 K in the zero magnetic field for the rapidly cooled sample after annealing at 800°C was 102 A/cm 2 .
Airborne and ground‐based studies of thunderstorms in the vicinity of Langmuir Laboratory (1980)

Abstract Flights through the central regions of thunderstorms were made over New Mexico on 6 and 15 August 1977 with the ONR/NMIMT Schweitzer aeroplane which carried equipment designed to measure all three components of the electric field, and the charge, Q , and diameter, d , of individual precipitation elements. On the earlier day, information was also obtained with: a rain‐gauge network surrounding Langmuir Laboratory; a 3 cm radar; an acoustic system for locating lightning channels; a ground‐based field‐change meter. The first cell on 6 August produced precipitation at the ground but no lightning. Vertical fields, Ex , of up to about 50kVm −1 and precipitation charge densities ρ of up to −0.5 C km −3 were recorded within the cloud. The second cell, which grew as the first one decayed, produced 7 lightning strokes in 9 minutes during which time the radar revealed vigorous vertical growth in a narrow zone containing precipitation. Thunder reconstructions showed the acoustic sources for the first flash of this cell to be very near the top of the cloud at an altitude of 10 km a.s.1. The subsequent flashes produced acoustic signals from progressively lower in the cloud. When the radar echo reached its maximum height lightning activity ceased. Ex values of up to about 50kVm −1 and pp values of down to −1 Ckm −3 were measured. ρp was consistently negative, individual charges being less than ±40 pC. Q values were within the inductive limit for a thundercloud at breakdown but no systematic relation between Q and d was found. Six penetrations were made through the thundercloud of 15 August, which produced only two lightning strokes. The Ex records were indicative of a (±) dipole located near the cloud top, at around –13°C. Fields of up to about 100kVm −1 and ρp values (positive and negative) of around 5Ckm −3 were measured. Q values of up to ±250 pC were recorded, with charges around ±50 pC being commonly found. No systematic Q‐ d relation was revealed, and smaller precipitation particles frequently carried charges (positive or negative) in excess of the inductive limit. On both days estimated precipitation rates were of order 10mmh −1 and on most occasions the pilot reported precipitation particles to be either ‘ice’ or ‘mixed liquid water and ice’.
Unconventional methods of imaging: computational microscopy and compact implementations (2016)

In the past two decades or so, there has been a renaissance of optical microscopy research and development. Much work has been done in an effort to improve the resolution and sensitivity of microscopes, while at the same time to introduce new imaging modalities, and make existing imaging systems more efficient and more accessible. In this review, we look at two particular aspects of this renaissance: computational imaging techniques and compact imaging platforms. In many cases, these aspects go hand-in-hand because the use of computational techniques can simplify the demands placed on optical hardware in obtaining a desired imaging performance. In the first main section, we cover lens-based computational imaging, in particular, light-field microscopy, structured illumination, synthetic aperture, Fourier ptychography, and compressive imaging. In the second main section, we review lensfree holographic on-chip imaging, including how images are reconstructed, phase recovery techniques, and integration with smart substrates for more advanced imaging tasks. In the third main section we describe how these and other microscopy modalities have been implemented in compact and field-portable devices, often based around smartphones. Finally, we conclude with some comments about opportunities and demand for better results, and where we believe the field is heading.
Editorial: First Quarter 2020 IEEE Communications Surveys and Tutorials (2020)

I welcome you to the first issue of the IEEE COMMUNICATIONS SURVEYS AND TUTORIALS in 2020. This issue includes 25 papers covering different aspects of communication networks. In particular, these articles survey and tutor various issues in "Wireless and Cellular Communications," "5G Communications," "Vehicular and Sensor Communications," "IoT and M2M," "SDN and NFV," "Internet Technologies," and "Network Security." A brief account for each of these papers is given below.
TIRC7 Inhibits T Cell Proliferation by Modulation of CTLA-4 Expression (2006)

Ab targeting of TIRC7 has been shown previously to inhibit T cell proliferation and Th1 lymphocyte-associated cytokine production. In this study, we demonstrate that Ab targeting of TIRC7 induces early cell surface expression of CTLA-4. The majority of stimulated CD4+ and CD8+ human T cells coexpress CTLA-4 and TIRC7. Similar to CTLA-4, TIRC7 rapidly accumulates at the site of Ag adhesion upon T cell activation. TIRC7 seems to colocalize with CTLA-4 in human T cells, and both molecules are associated with clathrin-coated vesicles, indicating they share intracellular transport systems. Moreover, Ab targeting of TIRC7 results in an early activation of CTLA-4 transcription. The inhibition of cell proliferation mediated by TIRC7 is dependent on CTLA-4 expression because the TIRC7-mediated inhibitory effects on cell proliferation and cytokine expression are abolished by Ab blockade of CTLA-4. Splenocytes obtained from CTLA-4-deficient mice are not responsive to TIRC7 Ab targeting. Thus, TIRC7 acts as an upstream regulatory molecule of CTLA-4 expression.
Metal ion catalyzed reactions of acrylonitrile, acrylamide, and ethyl acrylate by way of their Diels-Alder cycloadducts (1987)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal ion catalyzed reactions of acrylonitrile, acrylamide, and ethyl acrylate by way of their Diels-Alder cycloadductsPalaniappan Nanjappan and Anthony W. CzarnikCite this: J. Am. Chem. Soc. 1987, 109, 6, 1826–1833Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://pubs.acs.org/doi/10.1021/ja00240a037https://doi.org/10.1021/ja00240a037research-articleACS PublicationsRequest reuse permissionsArticle Views522Altmetric-Citations31LEARN 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
Comparing propofol with placebo for early resolution of acute migraine in adult emergency department patients: A double‐blind randomised controlled trial (2020)

Abstract Objective To compare propofol with placebo in adult ED patients with acute migraine. Primary outcome was headache resolution by 1 h. Secondary outcome was reduction in headache severity by two or more points on a numerical rating scale. Methods Double‐blind randomised controlled clinical trial comparing propofol (10 mg/mL) with placebo (20% intralipid). Adults with acute migraine without aura were included. The study drug was administered as an initial dose of 4 mL followed by up to five doses of 2 mL, delivered 5 min apart. Pain scores were taken prior to each dose and further administration was ceased when either the pain score was zero or the maximum dosage reached (140 mg of propofol or 14 mL of 20% intralipid). Results Of 40 recruited patients, 21 received propofol and 19 placebo. Headache resolution occurred for 5 (24%, 95% CI 13–57) and 6 (32%, 95% CI 13–57) patients, respectively, difference 8% (95% CI −20 to 36). Headache severity reduction by two or more numerical rating scale points was reported by 17 (81%, 95% CI 58–95) and 7 (37%, 95% CI 16–62) patients, respectively, difference 44% (95% CI 17–71). Conclusions Propofol was not superior to placebo for the primary outcome of early headache resolution. Superiority of propofol for the secondary outcome of headache severity reduction suggests that further research may be warranted.
Superparamagnetic Iron Oxide Labeling and Transplantation of Adipose-Derived Stem Cells in Middle Cerebral Artery Occlusion-Injured Mice (2007)

MRI proved useful in transplantation of adipose-derived stem cells in vivo. This imaging technique may be useful for studies of CNS stem cell therapies.
Effects of protein kinase C modulation by PEP005, a novel ingenol angelate, on mitogen-activated protein kinase and phosphatidylinositol 3-kinase signaling in cancer cells (2008)

PEP005 (ingenol-3-angelate) is a novel anticancer agent extracted from Euphorbia peplus that was previously shown to modulate protein kinase C (PKC), resulting in antiproliferative and proapoptotic effects in several human cancer cell lines. In Colo205 colon cancer cells, exposure to PEP005 induced a time- and concentration-dependent decrease of cells in S phase of cell cycle and apoptosis. In Colo205 cells exposed to PEP005, a variety of signaling pathways were activated as shown by increased phosphorylation of PKCdelta, Raf1, extracellular signal-regulated kinase 1/2 mitogen-activated protein kinase (MAPK), c-Jun NH(2)-terminal kinase, p38 MAPK, and PTEN. PEP005-induced activation of PKCdelta was associated with its translocation from the cytosol to the nucleus and other cellular membranes. Interestingly, PEP005 treatment also resulted in reduced expression of PKCalpha and reduced levels of phosphorylated active form of AKT/protein kinase B. These data suggest that PEP005-induced activation of PKCdelta and reduced expression of PKCalpha resulted in apoptosis by mechanisms mediated by activation of Ras/Raf/MAPK and inhibition of the phosphatidylinositol 3-kinase/AKT signaling pathways. This study supports ongoing efforts targeting PKC isoforms in cancer therapy with PEP005 alone and in combination with other cytotoxic agents.
<title>MOSAD IR focal plane per pixel A/D development</title> (1996)

An on focal plane digital readout development suggested by the Army Night Vision & Electronics Sensors Directorate is proceeding under a combined program with the development of two color HCT detector arrays. The on focal plane A/D process is based on the Amain patented multiplexed oversample A/D, MOSAD, technology. In the first year of the program, prototype on focal plane analog to digital converters for both staring arrays and scanning arrays were built and demonstrated. The prototypes included a 2 loop double ended switched MOSAD and a 1 loop single ended MOSAD. Results from the original experimental prototypes showed conclusively that better than 14 bits could be achieved and that well capacity could be increased to support high background HCT needs approaching 10<SUP>9</SUP> electrons. In the second year, a 64 X 64 staring array for HCT LWIR detectors, 50 micron centers, was built based on these original prototype designs. The layout of the per pixel MOSAD A/D staring array used Orbit 1.2 micron CMOS process and achieved a pixel size of 40 microns with a well capacity of 1.9 X 10<SUP>8</SUP> electrons. Integration capacitors were built using Orbit's normal double poly capacitors with a standard buffered direct inject TIA detector interface configuration. Preliminary testing has been completed indicating complete functionality. Fermionics LWIR HCT detectors with cutoff at 9 microns have been built for attachment to the readout but indium bumping was not completed in time to report system level testing results. However, some noise tests have been performed using on array current mirrors. These tests indicate that better than 12 bits has been achieved, but lower noise current sources will be required for a more accurate measurement.
Self-Seeded RSOA based WDM-PON Transmission Capacities (2013)

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 Q. Deniel, F. Saliou, P. Chanclou, and D. Erasme, "Self-Seeded RSOA based WDM-PON Transmission Capacities," in Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, OSA Technical Digest (online) (Optica Publishing Group, 2013), paper OW4D.3. Export Citation BibTex Endnote (RIS) HTML Plain Text Get Video Citation alert Save article
FHA-Mediated Cell-Substrate and Cell-Cell Adhesions Are Critical for Bordetella pertussis Biofilm Formation on Abiotic Surfaces and in the Mouse Nose and the Trachea (2011)

Bordetella spp. form biofilms in the mouse nasopharynx, thereby providing a potential mechanism for establishing chronic infections in humans and animals. Filamentous hemagglutinin (FHA) is a major virulence factor of B. pertussis, the causative agent of the highly transmissible and infectious disease, pertussis. In this study, we dissected the role of FHA in the distinct biofilm developmental stages of B. pertussis on abiotic substrates and in the respiratory tract by employing a murine model of respiratory biofilms. Our results show that the lack of FHA reduced attachment and decreased accumulation of biofilm biomass on artificial surfaces. FHA contributes to biofilm development by promoting the formation of microcolonies. Absence of FHA from B. pertussis or antibody-mediated blockade of surface-associated FHA impaired the attachment of bacteria to the biofilm community. Exogenous addition of FHA resulted in a dose-dependent inhibitory effect on bacterial association with the biofilms. Furthermore, we show that FHA is important for the structural integrity of biofilms formed on the mouse nose and trachea. Together, these results strongly support the hypothesis that FHA promotes the formation and maintenance of biofilms by mediating cell-substrate and inter-bacterial adhesions. These discoveries highlight FHA as a key factor in establishing structured biofilm communities in the respiratory tract.
Reactivity of MgB2 with common substrate and electronic materials (2002)

The reactivity of MgB2 with powdered forms of common substrate and electronic materials is reported. Reaction temperatures between 600 and 800 °C, encompassing the range commonly employed in thin-film fabrication, were studied. The materials tested for reactivity were ZrO2, yttria stabilized zirconia, MgO, Al2O3, SiO2, SrTiO3, TiN, TaN, AlN, Si, and SiC. At 600 °C, MgB2 reacted only with SiO2 and Si. At 800 °C, however, reactions were observed for MgB2 with Al2O3, SiO2, Si, SiC, and SrTiO3. The Tc of MgB2 decreased in the reactions with SiC and Al2O3.
Global and grain‐specific accumulation of glycoside hydrolase family 10 xylanases in transgenic maize (<i>Zea mays</i>) (2011)

In planta expression of cell wall degrading enzymes is a promising approach for developing optimized biomass feedstocks that enable low-cost cellulosic biofuels production. Transgenic plants could serve as either an enzyme source for the hydrolysis of pretreated biomass or as the primary biomass feedstock in an autohydrolysis process. In this study, two xylanase genes, Bacillus sp. NG-27 bsx and Clostridium stercorarium xynB, were expressed in maize (Zea mays) under the control of two different promoters. Severe phenotypic effects were associated with xylanase accumulation in maize, including stunted plants and sterile grains. Global expression of these xylanases from the rice ubiquitin 3 promoter (rubi3) resulted in enzyme accumulation of approximately 0.01 mg enzyme per gram dry weight, or approximately 0.1% of total soluble protein (TSP). Grain-specific expression of these enzymes from the rice glutelin 4 promoter (GluB-4) resulted in higher-level accumulation of active enzyme, with BSX and XynB accumulating up to 4.0% TSP and 16.4% TSP, respectively, in shriveled grains from selected T0 plants. These results demonstrate the potential utility of the GluB-4 promoter for biotechnological applications. The phenotypic effects of xylanase expression in maize presented here demonstrate the difficulties of hemicellulase expression in an important crop for cellulosic biofuels production. Potential alternate approaches to achieve xylanase accumulation in planta without the accompanying negative phenotypes are discussed.
Array of InGaAsSb light-emitting diodes (λ = 3.7 μm) (2009)

Spectral, current-voltage, and light-current characteristics of p-InAsSbP/n-InGaAsSb/n +-InAs narrow-gap diode structures with 130 × 130 μm lateral dimensions of active elements are presented. The 2D distribution of light emitted by the samples fabricated in the form of emitting flip-chip 1 × 4 arrays is examined, including analysis of the emission uniformity. The limiting effective temperature created by an emitter of this type is determined.
Finite-element analysis of the rotor/stator contact in a ring-type ultrasonic motor (1992)

A way to understand mechanical characteristics of an ultrasonic motor is presented. First, the vibration mode of a stator is calculated using a finite-element method (FEM) code. The path of the elliptic motion of the stator's teeth is obtained. The computed vibration mode at the surface of the stator is compared with that measured by an electrooptical displacement transducer. Next, the contact condition of the rotor/stator is calculated. The displacement and velocity of the rotor/stator, the distortion of the stick/slip area, the rotational speed of the rotor, and the friction loss of the motor are obtained. The calculated rotor displacement and torque-rotational speed curve correspond closely to the experimentally measured ones. The internal loss of the rotor/stator and the loss of the supporting felt are measured. The total loss of these losses and the calculated friction loss agree with the measured total loss. The calculated and the measured efficiency of the motor also agree.
Chaotic Neural Network for Biometric Pattern Recognition (2012)

Biometric pattern recognition emerged as one of the predominant research directions in modern security systems. It plays a crucial role in authentication of both real-world and virtual reality entities to allow system to make an informed decision on granting access privileges or providing specialized services. The major issues tackled by the researchers are arising from the ever-growing demands on precision and performance of security systems and at the same time increasing complexity of data and/or behavioral patterns to be recognized. In this paper, we propose to deal with both issues by introducing the new approach to biometric pattern recognition, based on chaotic neural network (CNN). The proposed method allows learning the complex data patterns easily while concentrating on the most important for correct authentication features and employs a unique method to train different classifiers based on each feature set. The aggregation result depicts the final decision over the recognized identity. In order to train accurate set of classifiers, the subspace clustering method has been used to overcome the problem of high dimensionality of the feature space. The experimental results show the superior performance of the proposed method.
A matrix density based algorithm to hierarchically co-cluster documents and words (2003)

This paper proposes an algorithm to hierarchically cluster documents. Each cluster is actually a cluster of documents and an associated cluster of words, thus a document-word co-cluster. Note that, the vector model for documents creates the document-word matrix, of which every co-cluster is a submatrix. One would intuitively expect a submatrix made up of high values to be a good document cluster, with the corresponding word cluster containing its most distinctive features. Our algorithm looks to exploit this. We have defined matrix density, and our algorithm basically uses matrix density considerations in its working.The algorithm is a partitional-agglomerative algorithm. The partitioning step involves the identification of dense submatrices so that the respective row sets partition the row set of the complete matrix. The hierarchical agglomerative step involves merging the most similar submatrices until we are down to the required number of clusters (if we want a flat clustering) or until we have just the single complete matrix left (if we are interested in a hierarchical arrangement of documents). It also generates apt labels for each cluster or hierarchy node. The similarity measure between clusters that we use here for the merging cleverly uses the fact that the clusters here are co-clusters, and is a key point of difference from existing agglomerative algorithms. We will refer to the proposed algorithm as RPSA (Rowset Partitioning and Submatrix Agglomeration). We have compared it as a clustering algorithm with Spherical K-Means and Spectral Graph Partitioning. We have also evaluated some hierarchies generated by the algorithm.