gebhart/patrepeval huggingface dataset:
Non-destructive testing of refractories, especially AZS materials, with ultrasound, microwaves and γ-radiation (1995)

In principle four different methods (ultrasound, microwaves, γ-radiation and x-rays) are available for the non-destructive testing of refractories. Three of these methods, i. e. ultrasound, microwaves and γ-radiation, are in use by different producers of AZS materials to carry out the quaUty control of their products. This paper will compare the three methods on the basis of the physical properties, present the existing devices, and show the advantages as well as the hmits of the different methods. γ-radiography, the oldest method in use, has one main disadvantage, which is the requirement of protection against radioactive radiation. Furthermore, while cracks and cavities can be detected with this method, structural changes can not be monitored. Therefore, the ultrasonic method was developed that allows to detect variations of porosity and grain size as well as cracks and voids when the ultrasonic parameters are tuned as well as possible. As an alternative method testing with microwaves is also possible. This method, however, shows its best results when testing sintered refractory products with open porosity.
Surface Sensor Systems in Plant Immunity (2019)

Protein complexes at the cell surface facilitate the detection of danger signals from diverse pathogens and initiate a series of complex intracellular signaling events that result in various immune responses.
A compact class-AB bulk-driven quasi-floating gate current mirror for low voltage applications (2013)

A compact class-AB bulk-driven quasi-floating gate current mirror is proposed. The circuit is based on an active class-A current mirror using bulk-driven quasi-floating gate (BD-QFG) MOS transistors and low voltage bulk-input pseudo-differential amplifier. The circuit can operate from a supply voltage as low as V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</sub> +V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">DSAT</sub> . The performance of the circuit is verified by SPECTRE, using a standard 0.18 μm CMOS process with a 0.5 V supply voltage. The circuit demonstrates low input impedance (934 Ω) and relatively high output impedance (1.13 MΩ). The circuit can drive the output current 8 times larger than the quiescent current. The power dissipation under quiescent condition is 8.2 μW.
Amphiphilic &#945;-Helical Antimicrobial Peptides and Their Structure / Function Relationships (2005)

To facilitate microbial membrane invasion, amphiphilic alpha-helical antimicrobial peptides (alpha-AMPs) show a spatial segregation of hydrophobic and hydrophilic residues about the alpha-helical long axis. Here we discuss potential mechanisms by which these peptides are able to disrupt membrane structure and the structural characteristics, which are required for function.
Research and Design of Teaching Evaluation System Based on Fuzzy Model (2011)

Teaching quality evaluation is an effective method to test teaching. Teaching quality evaluation is a typical uncertainty problem. With my school's teaching evaluation indexes, this paper proposes the design scheme of teaching evaluation system based on fuzzy model, in accordance with experts knowledge and experience. The system could make an accurate and efficient evaluation for teaching quality and provide a significant reference value.
Polarization imaging and mapping (1983)

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 Herbert B. Hallock and John Halajian, "Polarization imaging and mapping," Appl. Opt. 22, 964-966 (1983) Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Sprite position statement: use distributed state for failure recovery (2003)

The authors advocate keeping state in main memory instead of logging state to disk, so that higher performance services can be implemented. They are motivated by their distributed file system which uses stateful servers to support a high-performance distributed caching system. For reliability, a server's state is replicated in the main memory of other hosts so that the system can recover from the failure of a server. After a server reboots, its clients help it rebuild its internal state. The authors point out that as networks and processors get faster, but disks do not, relying on other hosts will be more efficient than using disks.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Derivatizat Ion of Primary Aromatic Amines with Fluorescamine (1980)

Abstract Fluorescamine forms stable, fluorescent derivatives with sterically-unhindered primary aromatic amines in both aqueous (borate buffer, pH 9/acetonitrile) and nonaqueous (pyridine/-acetonitrile) media. Aromatic amines with a substituent such as a methyl group or an aromatic ring ortho to the amine functionality either derivatized poorly or not at all because of steric hindrance. Key Words: FluorescaminePrimary Aromatic AminesFluorescence AnalysisNonaqueous and Aqueous Systems
Metabolism of chlorpromazine and promazine<i>in vitro</i>: Isolation and characterization of<i>N</i>-oxidation products (1988)

1. The syntheses of the secondary hydroxylamines of nor1chlorpromazine and nor1promazine via their corresponding primary hydroxylamines and oximes are described. 2. The N-oxidation products are unstable to analysis by g.l.c. without prior derivatization; the decomposition products and the structures of the trimethylsilyl (TMS) and trifluoroacetyl (TFA) derivatives were characterized by g.l.c.-mass spectrometry. 3. Chlorpromazine, promazine and their demethylated products were shown to undergo metabolic N- and alpha-C-oxidation, to yield hydroxylamines and carboxylic acids, on incubation with fortified 9000 g liver homogenates of male New Zealand white rabbits. 4. A condensation product, an artifact formed by reaction of the metabolically derived primary hydroxylamines with acetaldehyde, an impurity in the extraction solvent, diethyl ether, was identified. 5. N-hydroxynor1- and N-hydroxynor2chlorpromazine undergo metabolic reduction to the parent amines, and the secondary hydroxylamine undergoes N-demethylation to yield the corresponding primary hydroxylamine.
Deep Learning Approach for Image Denoising and Image Demosaicing (2017)

Color image normally contain of three main colors at the each pixel, but the digital cameras capture only one color at each pixel using color filter array (CFA). While through capturing in color image, some noise/artifacts is added. So, the both demosaicing and de-noising are the first essential task in digital camera. Here, both the technique can be solve sequentially and independently. A conventional neural network based de-noising technique has applied for the removal of noise/artifacts. Afterwards, frequency based demosaicing with the convolutional neural network based image reconstruction algorithm is apply to acquire another two missing color component. The result analysis presented in this paper demonstrate that our proposed de-nosing and demosaicing exhibits the better performance and it is applicable for a large variety of images.
Velocity analysis using prestack depth migration: Linear theory (1988)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1988Velocity analysis using prestack depth migration: Linear theoryAuthors: John T. EtgenJohn T. EtgenStanford Universityhttps://doi.org/10.1190/1.1892387 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1892387FiguresReferencesRelatedDetailsCited byKinematics of common-image gathers — Part 2: Tomographic ray tracing and applicationsJean-Philippe Montel and Gilles Lambaré16 September 2019 | GEOPHYSICS, Vol. 84, No. 5Tomographic velocity analysis and wave-equation depth migration in an overthrust terrain: A case study from the Tuha Basin, ChinaBin Lyu, Qin Su, and Kurt J. Marfurt14 November 2017 | Interpretation, Vol. 6, No. 1The time delay exploding reflector method: An efficient approach to scenario testing and WEMVAMark Roberts1 September 20163. Estimating subsurface parameter fields for seismic migration: Velocity model buildingIan F. Jones13 October 2015Analysis of residual moveout after migration of walk-away VSP dataYue Du, Robert R. Stewart, and Mark E. Willis19 August 2013Ray-based gridded tomography for tilted transversely isotropic mediaXiaoxiang Wang and Ilya Tsvankin4 January 2013 | GEOPHYSICS, Vol. 78, No. 1Application of RTM 3D angle gathers to wide-azimuth data subsalt imagingYan Huang, Bing Bai, Haiyong Quan, Tony Huang, Sheng Xu, and Yu Zhang22 November 2011 | GEOPHYSICS, Vol. 76, No. 5Prestack residual migration in the frequency domainPaul C. Sava4 April 2003 | GEOPHYSICS, Vol. 68, No. 2 SEG Technical Program Expanded Abstracts 1988ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1988 Pages: 1359 publication data© 1988 Copyright © 1988 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 10 Feb 2005 CITATION INFORMATION John T. Etgen, (1988), "Velocity analysis using prestack depth migration: Linear theory," SEG Technical Program Expanded Abstracts : 909-912. https://doi.org/10.1190/1.1892387 Plain-Language Summary PDF DownloadLoading ...
A next-generation countermeasure architecture to prevent explosives attacks at large public events (2009)

A concept has been developed for a next-generation integrated countermeasure architecture to detect improvised explosive devices hidden on people or left behind in unstructured crowds. The work is part of the Standoff Technology Integration and Demonstration Program of the U.S. Department of Homeland Security's (DHS's) Science and Technology Directorate. The architecture uses a layered-defense approach that automates screening operations, prioritizes threats, and mobilizes resources accordingly. A system tracks people in motion, integrating and automating sensor control and scan acquisition to optimize threat-identification accuracy and allocation of screening resources. A threat-based decision module prioritizes screening targets based on user-defined rules. Operators manage system-wide risk and mobilize field teams for interdiction. DHS is working with industry on technology development and testing to achieve the required level of system integration and economics in crowd conditions.
Effects of truncations of the cytoplasmic tail of the luteinizing hormone/chorionic gonadotropin receptor on receptor-mediated hormone internalization. (1992)

The LH/CG receptor is a member of the family of G protein-coupled receptors and consists of a large N-terminal extracellular domain (which is responsible for binding hormone) attached to a region that spans the plasma membrane seven times, ending with an intracellularly located C-terminus. Binding of LH or human CG (hCG) to the LH/CG receptor causes a stimulation of adenylyl cyclase, presumably via activation of Gs. The binding of hormone also leads to its subsequent internalization by receptor-mediated endocytosis. In order to investigate the role of the cytoplasmic tail of this receptor in these events, we prepared a series of mutants in which progressively larger portions of the cytoplasmic tail were deleted. Deletion of 58 amino acids from the C-terminus, in which only 11 cytoplasmic residues remain, resulted in a receptor that was not expressed on the plasma membrane. Receptors rat LHR (rLHR)-t653 and rLHR-t631, in which 21 or 43 amino acids were removed, respectively, were properly expressed. These results suggest that a region(s) between residues 616 and 631 of the rLH/CG receptor are required for proper insertion and/or targeting of the receptor into the plasma membrane. Cells expressing rLHR-t653 or rLHR-t631 bound hCG with the same high affinity as cells expressing the full-length receptor, and basal levels of cAMP were the same among the cells. However, cells expressing the truncated receptors responded to hCG with approximately 2-fold greater levels of maximal cAMP accumulation than cells expressing the full-length receptor. Deletion of up to 43 amino acids from the C-terminus of the rLH/CG receptor had no deleterious effect on hCG internalization. In fact, mutants lacking 21 and 43 amino acids exhibited progressively faster rates of hCG internalization as compared to the full-length receptor. Once internalized, hCG was also degraded at a faster rate in cells expressing the truncated LH/CG receptors. Since hCG-stimulated cAMP stimulation and hCG internalization are retained by rLHR-t631, it can be concluded that the residues, not necessarily the same, required for these functions reside within the 26 amino acids of the cytoplasmic tail closest to the seventh transmembrane helix and/or residues within the intracellular loops. Our data show, however, that both hCG-stimulated cAMP production and hCG internalization are enhanced by the removal of the distal portion of the cytoplasmic tail.
Definition of Histopathologic Changes in Gastroesophageal Reflux Disease (2000)

A series of 71 patients with multiple measured biopsies of the gastroesophageal junctional region permitting assessment of the presence and length of different glandular epithelial types is presented. All but nine of 53 patients in whom a 24-hour pH study was performed had abnormal reflux, suggesting that endoscopic recognition of an abnormal columnar mucosa at the gastroesophageal junction sufficient to precipitate multiple-level biopsies indicates a high probability of abnormal reflux. All patients had cardiac mucosa (CM) or oxyntocardiac mucosa (OCM). CM was present in 68 of 71 patients. The prevalence of intestinal metaplasia increased with increasing CM+OCM length, and was present in all 22 patients with a CM+OCM length >2 cm and in 20 of 49 patients with a CM+OCM length <2 cm. Patients with a CM+OCM length >2 cm had a markedly higher acid exposure than patients with a CM+OCM length <2 cm. The findings suggest that the presence of CM and OCM in the junctional region are predictive of abnormal acid exposure, and that increasing OCM+CM length correlates strongly with the amount of acid exposure. The histologic finding of CM and OCM represents a sensitive histologic criterion for gastroesophageal reflux rather than normal epithelia. These diagnostic criteria represent the first useful histologic definitions for assessing the presence and severity of reflux.
The Integration of Capillary Pressures and Pickett Plots for Determination of Flow Units and Reservoir Containers (2001)

Abstract The concept of flow (or hydraulic) units and reservoir containers has been used in the oil industry with a good deal of success during the last few years. The process or delivery speed k/f can be used in many instances to define a flow unit. Correlation of flow units between wells helps to establish reservoirs containers and to forecast reservoir performance. This study shows that a Pickett crossplot of effective porosity vs. true resistivity (in some cases apparent resistivity or true resistivity affected by a shale group) should result in parallel straight lines for intervals with constant process speed k/f. The slope of the straight lines is related to the porosity exponent m, the water saturation exponent n, and constants in the absolute permeability equation. From the straight lines it is possible to determine directly capillary pressures and pore throat apertures for each flow unit at any water saturation. Pore throats at 65% water saturation compare very well with Winland r35 values. The method has not been published previously in the literature. Building lines of constant k/ϕ allows displaying complete capillary pressure curves on the Pickett plot including regions that are and are not at irreducible water saturation. Previous empirical methods for determining absolute permeability of a given interval assume that the water saturation is at irreducible conditions. This paper presents a technique that allows estimating absolute permeability even if the interval contains moveable water. The use of this technique is illustrated with previously published data from the Morrow sandstone in the Sorrento field of Southeastern Colorado and carbonates from the Mission Canyon formation in the Little Knife field of North Dakota. It is concluded that flow units can be determined reliably from the integration within one single log-log graph of Pickett plots, capillary pressures, pore throat apertures and Winland r35 values. The correlation of the flow units between wells leads to the definition of reservoir containers.
Optical clock distribution using a mode-locked semiconductor laser diode system (1991)

The distribution of the master clock in high-speed digital-switching machines is a longstanding problem. Because of limitations in electronic fan-out capability, clock distribution is typically achieved by cascading many buffer amplifiers and finally shipping the output of each final buffer, via point-to-point transmission line, to the destination printed circuit board.
Garbage Collection Techniques for Flash-Resident Page-Mapping FTLs (2015)

Storage devices based on flash memory have replaced hard disk drives (HDDs) due to their superior performance, increasing density, and lower power consumption. Unfortunately, flash memory is subject to challenging idiosyncrasies like erase-before-write and limited block lifetime. These constraints are handled by a flash translation layer (FTL), which performs out-of-place updates, wear-leveling and garbage-collection behind the scene, while offering the application a virtualization of the physical address space. A class of relevant FTLs employ a flash-resident page-associative mapping table from logical to physical addresses, with a smaller RAM-resident cache for frequently mapped entries. In this paper, we address the problem of performing garbage-collection under such FTLs. We observe two problems. Firstly, maintaining the metadata needed to perform garbage-collection under these schemes is problematic, because at write-time we do not necessarily know the physical address of the before-image. Secondly, the size of this metadata must remain small, because it makes RAM unavailable for caching frequently accessed entries. We propose two complementary techniques, called Lazy Gecko and Logarithmic Gecko, which address these issues. Lazy Gecko works well when RAM is plentiful enough to store the GC metadata. Logarithmic Gecko works well when RAM isn't plentiful and efficiently stores the GC metadata in flash. Thus, these techniques are applicable to a wide range of flash devices with varying amounts of embedded RAM.
Syntheses of new 'large core' discogens based on the triphenylene, azatriphenylene and hexabenztrinaphthylene nuclei (2001)

Abstract We have synthesized new discogens based on polyphenylated triphenylene, polyphenylated azatriphenylene and hexabenztrinaphthylene. A procedure for the extension of the aromatic core by Suzuki coupling is described, which minimizes competitive reductive dehalogenation.
StarTrack next generation: a scalable infrastructure for track-based applications (2010)

StarTrack was the first service designed to manage tracks of GPS location coordinates obtained from mobile devices and to facilitate the construction of track-based applications. Our early attempts to build practical applications on StarTrack revealed substantial efficiency and scalability problems, including frequent client-server roundtrips, unnecessary data transfers, costly similarity comparisons involving thousands of tracks, and poor fault-tolerance. To remedy these limitations, we revised the overall system architecture, API, and implementation. The API was extended to operate on collections of tracks rather than individual tracks, delay query execution, and permit caching of query results. New data structures, namely track trees, were introduced to speed the common operation of searching for similar tracks. Map matching algorithms were adopted to convert each track into a more compact and canonical sequence of road segments. And the underlying track database was partitioned and replicated among multiple servers. Altogether, these changes not only simplified the construction of track-based applications, which we confirmed by building applications using our new API, but also resulted in considerable performance gains. Measurements of similarity queries, for example, show two to three orders of magnitude improvement in query times.
Soluble Thrombomodulin Increases in Patients with Disseminated Intravascular Coagulation and in Those with Multiple Organ Dysfunction Syndrome after Trauma (1995)

Soluble TM as a novel endothelial cell injury marker increases in patients with DIC and also in those with MODS after trauma. Neutrophil elastase may be involved in the pathogenesis of the injury. Soluble TM is a marker of the severity of injury and is a good predictor of MODS.
ESCRT-I components of the endocytic machinery are required for Rim101-dependent ambient pH regulation in the yeast Yarrowia lipolytica (2005)

Ambient pH signalling involves a cascade of conserved Rim or Pal products in ascomycetous yeasts or filamentous fungi, respectively. Insertional mutagenesis in the yeast Yarrowia lipolytica identified two components of the endosome-associated ESCRT-I complex involved in multivesicular body (MVB) vesicle formation, YlVps28p and YlVps23p. They were shown to be required at alkaline pH, like Rim factors, for transcriptional activation of alkaline-induced genes and repression of acid-induced genes. The constitutively active YlRIM101-1119 allele, which suppresses the pH-signalling defects of Ylrim mutations, also suppresses Ylvps defects in pH response, but not in endocytosis. The contribution of the ESCRT-III component Snf7p could not be assessed due to the essential nature of this component in Y. lipolytica. Unlike Rim factors, YlVps4p, a component of the MVB pathway acting downstream from ESCRT complexes, seems not to be required for the alkaline response. In Y. lipolytica, all vps mutations including those affecting YlVPS4, affected growth at acidic pH, a feature not exhibited by Ylrim mutations. These results suggest that Rim and Vps pathways cooperate in ambient pH signalling and that this relation is conserved across the full range of hemiascomycetous yeasts.
Passivating contacts for silicon solar cells with 800 °C stability based on tunnel-oxide and highly crystalline thin silicon layer (2016)

Passivating contacts based on nanostructured highly crystalline thin silicon layers are presented. The contact layer stack is optimized towards full crystallinity targeting high transparency. We present an optimization of an electron selective contact and demonstrate excellent surface passivation on n-type and also p-type wafers with such highly crystalline layers. On n-type wafers, the electron selective contact attains an implied open-circuit voltage of 718 mV at an annealing temperature of 925°C. For p-type wafers we find optimum conditions between 850°C and 900°C attaining an implied open-circuit voltage of 723 mV. First tests with hole-selective contacts have yielded an implied open-circuit voltage of up to 676 mV after thermal annealing at 800°C.