gebhart/patrepeval huggingface dataset:
Alloying effects of mechanical properties of B2-NiAl intermetallic compound calculated by first-principles method (2006)

Using the first-principles pseudopotential plane-wave methods based on the density functional theory,the geometric and electronic structures of(NiX)Al supercells with different alloying elements X(X=Cr,Mn,Fe,Co and Cu) or different Fe contents,e.g.0,3.125%,4.167% and 6.25%(mole fraction) are calculated.Several mechanical properties parameters such as elastic constant C_(44),Cauchy pressure parameter(C_(12)-C_(44)),elastic modulus E,the shear modulus G and their ratio G/B_0 are used to characterize and assess the effect of alloying element and Fe content on the ductility and hardness of NiAl intermetallic compounds,respectively.The result shows that high addition of alloying element X(6.25%) can not enhance the ductility of NiAl intermetallic compound although it makes the hardness of NiAl improve as following order: NiAl(Ni_7Cu)Al_8(Ni_7Cr)Al_8(Ni_7Fe)Al_8(Ni_7Co)-Al_8(Ni_7Mn)Al_8.And the decreasing order of ductility of NiAl induced by alloying element X is opposite to their hardness increasing order.With the increase of Fe content,the hardness of NiAl is elevated.And the upper limit making the hardness of NiAl increase is about 4%.Meanwhile a gradual improvement of the ductility of NiAl is also observed as Fe addition content decreases.From this variation tendency of the ductility of NiAl versus Fe content,a deduction is made.The intrinsic embitterment of NiAl can be restrained if Fe content is enough low.
A Novel 1.2 kV 4H-SiC Buffered-Gate (BG) MOSFET: Analysis and Experimental Results (2017)

A novel 1.2-kV-rated 4H-SiC buffered-gate MOSFET (BG-MOSFET) structure is proposed and experimentally demonstrated to have superior high frequency figures-of-merit (HF-FOMs) for the first time. From the measured data on devices fabricated in a 6-in foundry, the BGMOSFET is demonstrated to have 4.0× and 2.6× smaller HF-FOM [R <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ON</sub> × Q <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">gd</sub> ], and 3.6× and 2.1× smaller HF-FOM [R <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ON</sub> × C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">gd</sub> ], when compared with the conventional MOSFET and split-gate MOSFET, respectively.
Galactic rotational velocities and dark neutrino matter (2000)

It has been assumed that neutrinos with non-vanishing rest mass contribute the gravitational field of our Galaxy. This contribution can be studied empirically from the orbiting velocities of galactic objects. In this way hints for the neutrino rest mass can be obtained from the rotation curve of our Galaxy.
Lymphokines secreted by an established lymphocyte line modulate receptor-mediated endocytosis in macrophages derived from human monocytes. (1983)

As little as 1 microliter of serum-free supernatant from Mo(t), an established lymphocyte line, when added to a 500-microliters incubation of macrophages derived from human monocytes, significantly decreased the receptor-mediated uptake and degradation of three cholesterol-rich molecules: low density lipoprotein (LDL); LDL complexed to dextran sulfate; and LDL modified by malondialdehyde (MDA-LDL). In contrast, the receptor-mediated uptake and degradation of mannosyl bovine serum albumin was increased three-fold. The Mo(t) supernatant did not contain competitive inhibitors of the cholesterol-rich ligands, and it did not alter macrophage receptor-independent endocytosis, protein synthesis, or phagocytosis of heat-killed yeast. The effect of the Mo(t) supernatant was specific for macrophages and was abolished by preincubation of the supernatant with trypsin, which indicates that the active substances are protein in nature. The decrease in the uptake and degradation of MDA-LDL induced by preincubating the macrophages with Mo(t) supernatant appeared to result from a decrease in the number of receptors for this ligand at the cell surface. The isolation of these lymphokines should offer new insights into macrophage receptor-mediated endocytosis, and may yield substances useful in preventing foam cell formation in atherosclerosis.
A combined register-stack architecture (1978)

A stack is the simplest mechanism for evaluating arithmetic expressions, while a group of general registers is the simplest mechanism for quick access to a small number of common subexpressions or loop control variables. Until now, computers have been designed around either a stack mechanism or a register mechanism, but no machine has included both in a convenient way. In this paper, we propose a new <u>combination</u> architecture in which there are general registers, but one of these registers is the top of an evaluation stack. This combination is intended entirely for calculation, and is not related to the use of stacks in main memory for holding activation records of Algol-like procedures, or to the use of stacks for holding subroutine linkage information. The mechanism can be implemented entirely in a fixed number of hardware registers, with no elaborate stack spilling mechanism. The combination architecture meshes perfectly with existing general-register architectures, while providing the advantages of a stack for expression evaluation. One way to view the combination architecture is that it provides access to about twice as many fast registers with no increase in the number of instruction bits needed to address them.
Circularly Polarized Photoluminescence from Gradient-Pitch Chiral-Nematic Films (2001)

A mixture consisting of a nematic acrylate and a chiral diacrylate lightly doped with Exalite 428, a laser dye, was prepared into thin films for in situ photopolymerization. The laser dye served to regulate the photocuring intensity profile into the film and as a light emitter. With optimized chemical composition, photocuring intensity, and temperature, a gradient-pitch film with a broad resonance band was produced to cover the emission peak of the laser dye. The SEM image provided new insight into the distribution of pitch length across the film thickness, consistent with the selective reflection spectra. Upon UV excitation, the observed sense and degree of circularly polarized photoluminescence were qualitatively interpreted on the basis of the photoexcitation intensity received by the dopant molecules and by the wavelength-dependent interaction of emitted light with an asymmetric structure.
A Display-Independent High Dynamic Range Television System (2016)

High dynamic range (HDR) television (TV) has captured the imagination of the broadcast and movie industries. This paper presents an overview of the BBC's “Hybrid Log-Gamma” solution, which is designed to meet the requirements of HDR TV. The signal is display independent and requires no complex mastering metadata. In addition to providing high-quality HDR pictures, it also delivers a high-quality “compatible” image to legacy standard dynamic range screens and can be mixed, resized, and compressed using standard tools and equipment. The technical requirements for a high-quality HDR TV system are presented. Quantization effects (or “banding”) are analyzed theoretically and confirmed experimentally. It is shown that quantization effects are comparable to or below competing HDR solutions. The psychovisual effects of presenting images on emissive displays in dim environments are shown experimentally, and the analysis informs the design of this HDR system.
Ver, ler e participar do anúncio impresso da cerveja SOL (2012)

This article is a small part of a dissertation defended in May 2011 with the necessary updates. The paper presents a theoretical analysis, and somewhat technical, about a SOL Beer print ad in Brazil. For that, draws some theoretical concepts of image analysis (iconic) and advertising rhetoric focused on one type of print ad with interactive elements that requires manipulation by the receiver. This manipulation is based on texts by Arlindo Machado and Alex Primo talking about interactivity. Whereas the semiotic analysis allows an understanding of the multiple dimensions and manifestations of different languages will be taken based here on the theories of signs by Charles Sanders Peirce, as well as Umberto Eco and Roland Barthes. For related approaches to imaging studies will be used the foundations of Martine Joly and others, as well as the semiotics applied by texts from Lucia Santaella and Denise Guimarães mainly.
Real-time event driven architecture for activity monitoring and early warning (2005)

There is an increasing demand outside of the military and intelligence community for real-time and near real-time applications and solutions, especially in areas where continuous adaptation to the environment is critical. In this paper, we survey the recent evolution of the event driven applications and discuss their potential implications on the system and middleware trends. These applications include service provisioning for telecommunication, trading system for financial services, logistics and asset management in manufacturing, digital oil field for the production of oil and gas, telematics for automotive maintenance, and disease surveillance for public health. These applications likely drive the emergence of a new class of middleware components and system architectures that are optimized for event processing and routing. At the system level, event processing drives the convergence of message gateways and routers. At the middleware level, event based application necessitates the emergence of programmable event processing engine to compliment traditional database management systems and application servers.
Benzoate Metabolism in <i>Pseudomonas putida</i> ( <i>arvilla</i> ) mt-2: Demonstration of Two Benzoate Pathways (1973)

Benzoate-grown cells of Pseudomonas putida(arvilla) mt-2 contain both metapyrocatechase and pyrocatechase activities, although the former activity is much higher than that of the latter. A spontaneous mutant deficient in metapyrocatechase and 2-hydroxymuconic semialdehyde hydrolyase, the first two enzymes in the meta-cleavage pathway of the ring of catechol, has been isolated from this strain. This mutant grows well on a minimal medium containing benzoate as a sole carbon source and has the high activity of pyrocatechase. These findings indicate that the strain mt-2 possesses the genetic capacity for enzymes of both the meta- and ortho-cleavage pathways of benzoate degradation, but its phenotypic expression is the meta pathway.
Space‐time diversity‐enhanced QoS provisioning for real‐time service over MC‐DS‐CDMA based wireless networks (2007)

Abstract In order to support the quality‐of‐service (QoS) requirements for real‐time traffic over broadband wireless networks, advanced techniques such as space‐time diversity (STD) and multicarrier direct‐sequence code division multiple access (MC‐DS‐CDMA) are implemented at the physical layer. However, the employment of such techniques evidently affects the QoS provisioning algorithms at the medium access control (MAC) layer. In this paper, we propose a space‐time infrastructure and develop a set of cross‐layer real‐time QoS‐provisioning algorithms for admission control, scheduling, and subchannel‐allocations. We analytically map the parameters characterizing the STD onto the admission‐control region guaranteeing the real‐time QoS. Our analytical analyses show that the proposed algorithms can effectively support real‐time QoS provisioning. Also presented are numerical solutions and simulation results showing that the STD can significantly improve the QoS provisioning for real‐time services over wireless networks. Copyright © 2007 John Wiley & Sons, Ltd.
Iterative Receiver for MIMO-OFDM Systems with Joint ICI Cancellation and Channel Estimation (2008)

In MIMO-OFDM systems, the time-varying fading of channel can destroy the orthogonality of subcarriers. This causes serious intercarrier interference (ICI), thus leading to significant system performance degradation, which becomes more severe as the normalized Doppler frequency increases. In this paper, we propose a low-complexity iterative receiver with joint frequency-domain ICI cancellation and pilot-assisted channel estimation to minimize the effect of time-varying channel. At the first stage of receiver, the interference between adjacent sub-carriers is subtracted from received OFDM symbols. The parallel interference cancellation (PIC) detection with decision statistics combining (DSC) is then performed to suppress the interference from different antennas. By restricting the interference to the limited number of neighboring subcarriers, the computational complexity of our proposed receiver can be significantly reduced. Furthermore, channel parameters estimated with pilot symbols placed in equispaced groups on FFT grid are used to improve the system performance during iteration. Simulation results show that the proposed MIMO-OFDM iterative receiver can effectively mitigate the effect of ICI and approach the ICI-free performance over time-varying frequency-selective fading channels.
Passive mechanical gravity compensation for robot manipulators (2002)

A simple mechanical method for passively compensating for gravitationally induced joint torques is presented. This energy-conservative gravity-compensation method is suitable for a variety of manipulator designs. With cables and appropriate pulley profiles, changes in potential energy associated with link motion through a gravity field can be mapped to changes in strain energy storage in spring elements. The resulting system requires significant energy input only for acceleration and deceleration or to resist external forces. A testbed with both single- and double-link configurations has demonstrated the efficiency and accuracy of this gravity compensation method, as well as its robustness under dynamic loading conditions.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Protein-based optical computing and memories (1992)

The current and potential uses of bacteriorhodopsin in optical computing and memory devices are reviewed. The protein has significant potential for use in these applications due to unique intrinsic photophysical properties, and the range of chemical and genetic methods available for optimizing performance for specific application environments. The intrinsic properties of the native bacteriorhodopsin protein are described. The applications of bacteriorhodopsin in spatial light modulators, integral components in a majority of one-dimensional and two-dimensional optical processing environments, and holographic associative memories are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
OMP AMMP analysis with Sun ONE Studio 8 (2008)

The Sun ONE Studio 8 release of compilers, libraries and tools incorporate new and improved functionality to help understand the execution of multithreaded (and multiprocess) applications and the analysis of memory and cache performance. One of the applications from the SPEC OMP(M) benchmark suite, AMMP, is studied to demonstrate how data-oriented analysis and a customisable chart of profile and trace events complement existent functionality to direct the tuning of applications to execute more efficiently on modern multiprocessor systems.
1,6-ADDITION OF HYDROGEN TO UNSATURATED 1,4-DIKETONES (1929)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,6-ADDITION OF HYDROGEN TO UNSATURATED 1,4-DIKETONESRobert E. LutzCite this: J. Am. Chem. Soc. 1929, 51, 10, 3008–3023Publication Date (Print):October 1, 1929Publication History Published online1 May 2002Published inissue 1 October 1929https://pubs.acs.org/doi/10.1021/ja01385a020https://doi.org/10.1021/ja01385a020research-articleACS PublicationsRequest reuse permissionsArticle Views82Altmetric-Citations5LEARN 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
Disposable Attenuated Total Reflection-Infrared Crystals from Silicon Wafer: A Versatile Approach to Surface Infrared Spectroscopy (2012)

Attenuated total reflection-infrared (ATR-IR) spectroscopy is increasingly used to characterize solids and liquids as well as (catalytic) chemical conversion. Here we demonstrate that a piece of silicon wafer cut by a dicing machine or cleaved manually can be used as disposable internal reflection element (IRE) without the need for polishing and laborious edge preparation. Technical aspects, fundamental differences, and pros and cons of these novel disposable IREs and commercial IREs are discussed. The use of a crystal (the Si wafer) in a disposable manner enables simultaneous preparation and analysis of substrates and application of ATR spectroscopy in high temperature processes that may lead to irreversible interaction between the crystal and the substrate. As representative application examples, the disposable IREs were used to study high temperature thermal decomposition and chemical changes of polyvinyl alcohol (PVA) in a titania (TiO(2)) matrix and assemblies of 65-450 nm thick polystyrene (PS) films.
Endocrine cells share expression of N‐CAM with neurones (1987)

The expression of the neural cell adhesion molecule, N-CAM, was examined in the anterior lobe of rat hypophysis by immunocytochemistry at light and electron microscope levels. In addition, N-CAM antigenic determinants present in adrenal medulla, anterior hypophysis and PC12 cells were compared by immunoblotting with those found in cerebellum. All secretory cells in the anterior hypophysis were found to be N-CAM positive on their surfaces, but not all of the three polypeptide determinants typical of cerebellum were present in the endocrine tissues or cell line tested. In addition, a new N-CAM determinant of 49 kDa not present in cerebellum was found in adrenal medulla and hypophysis, although it was absent from PC12 cells. The possible implications of these data are discussed.
Generation of a proton motive force by histidine decarboxylation and electrogenic histidine/histamine antiport in Lactobacillus buchneri (1993)

Lactobacillus buchneri ST2A vigorously decarboxylates histidine to the biogenic amine histamine, which is excreted into the medium. Cells grown in the presence of histidine generate both a transmembrane pH gradient, inside alkaline, and an electrical potential (delta psi), inside negative, upon addition of histidine. Studies of the mechanism of histidine uptake and histamine excretion in membrane vesicles and proteoliposomes devoid of cytosolic histidine decarboxylase activity demonstrate that histidine uptake, histamine efflux, and histidine/histamine exchange are electrogenic processes. Histidine/histamine exchange is much faster than the unidirectional fluxes of these substrates, is inhibited by an inside-negative delta psi and is stimulated by an inside positive delta psi. These data suggest that the generation of metabolic energy from histidine decarboxylation results from an electrogenic histidine/histamine exchange and indirect proton extrusion due to the combined action of the decarboxylase and carrier-mediated exchange. The abundance of amino acid decarboxylation reactions among bacteria suggests that this mechanism of metabolic energy generation and/or pH regulation is widespread.
Polaprezinc prevents oral mucositis associated with radiochemotherapy in patients with head and neck cancer (2010)

Oral mucositis is frequent but serious adverse event associated with radiotherapy or radiochemotherapy in head and neck cancer severely impairs health-related quality of life, leading to poor prognosis due to discontinuation of the therapy. Although a number of compounds have been tested for prophylaxis of oral mucositis, few of them are satisfactory. We investigated the effect of polaprezinc (zinc L-carnosine), a gastric mucosal protective drug, on radiochemotherapy-induced oral mucositis, pain, xerostomia and taste disturbance in patients with head and neck cancer. Patients were randomly assigned to receive polaprezinc (n = 16) or azulene oral rinse as the control (n = 15). The incidence rates of mucositis, pain, xerostomia and taste disturbance were all markedly lower in polaprezinc group than in control. Moreover, the use of analgesics was significantly (p = 0.003) less frequent and the amount of food intake was significantly (p = 0.002) higher in polaprezinc group than in control. On the other hand, tumor response rate in patients with neoadjuvant radiochemotherapy was not significantly affected by polaprezinc, in which the response rate (complete plus partial response) was 88% for polaprezinc and 92% for control (p = 1.000). Therefore, it is highly assumable that polaprezinc is potentially useful for prevention of oral mucositis and improvement of quality of life without reducing the tumor response.
Highly Stereoselective Synthesis of Two Natural Olefinic Diols via <i>N</i>-Oxide [2,3]Sigmatropic Rearrangement (1990)

Abstract The [2,3]sigmatropic rearrangement of α-substituted N,N-dimethylmethallylamine N-oxides results in a highly stereoselective formation of trans olefins oxygenating at the allylic position, and providing a quite efficient synthesis of cuspidiol and plaunotol.
Zur Kenntnis von Nitrothiazolverbindungen III (1950)

Abstract Es wurde 2‐Nitro‐5‐bromthiazol synthetisiert und die Eigenschaften und Reaktionen dieses Körpers wurden mit denjenigen des isomeren 2‐Brom‐5‐nitrothiazols verglichen. Ferner wurde 2‐Methyl‐5‐nitrothiazol dargestellt und andererseits durch Abbau der 2‐Methyl‐thiazol‐5‐carbonsäure 2‐Methyl‐5‐acetylaminothiazol gewonnen.
New books - Solvent extraction chemistry (1967)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew books - Solvent extraction chemistryD. Dyrssen, J.-O. Liljenzin, and J. RydbergCite this: Anal. Chem. 1967, 39, 14, 82A–83APublication Date (Print):December 1, 1967Publication History Published online21 September 2008Published inissue 1 December 1967https://pubs.acs.org/doi/10.1021/ac50157a015https://doi.org/10.1021/ac50157a015research-articleACS PublicationsRequest reuse permissionsArticle Views65Altmetric-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