gebhart/patrepeval huggingface dataset:
Unified Green’s function retrieval by cross-correlation; connection with energy principles (2007)

It has been shown theoretically and observationally that the Green's function for acoustic and elastic waves can be retrieved by cross-correlating fluctuations recorded at two locations. We extend the concept of the extraction of the Green's function to a wide class of scalar linear systems. For systems that are not invariant under time reversal, the fluctuations must be excited by volume sources in order to satisfy the energy balance (equipartitioning) that is needed to extract the Green's function. The general theory for retrieving the Green's function is illustrated with examples that include the diffusion equation, Schrödinger's equation, a vibrating string, the acoustic wave equation, a vibrating beam, and the advection equation. Examples are also shown of situations where the Green's function cannot be extracted from ambient fluctuations. The general theory opens up new applications for the extraction of the Green's function from field correlations that include flow in porous media, quantum mechanics, and the extraction of the response of mechanical structures such as bridges.
Initial studies on microelectromechanical system flux concentrators (2008)

To take advantage of the potential offered by the recent increase in the magnetoresistance of magnetic tunnel junctions, it is necessary to address the problem of 1∕f noise. ARL has been working on a device, the microelectromechanical system (MEMS) flux concentrator, that mitigates this problem by modulating the sensed magnetic field so that the sensor operates at a higher frequency region where the 1∕f noise is smaller. Initial results of testing the device are reported. Though the final step in the fabrication of the device appears to have adversely affected the MEMS motion, two important results were obtained. They are (1) applying the large amplitude voltage at kilohertz frequencies necessary to drive the MEMS structure does not increase the background noise and (2) even though the width of the drive voltage is several hertz, one can demodulate the signal using a lock-in amplifier in order to extract 1Hz modulation signals. This last result shows that the sensor can be used to detect slow moving or varying magnetic anomalies.
Image authentication techniques for surveillance applications (2001)

In automatic video surveillance (VS) systems, the issue of authenticating the video content is of primary importance. Given the ease with which digital images and videos can be manipulated, practically they do not have any value as legal proof, if the possibility of authenticating their content is not provided. In this paper, the problem of authenticating video surveillance image sequences is considered. After an introduction motivating the need for a watermarking-based authentication of VS sequences, a brief survey of the main watermarking-based authentication techniques is presented and the requirements that an authentication algorithm should satisfy for VS applications, are discussed. A novel algorithm which is suitable for VS visual data authentication is also presented and the results obtained by applying it to test data are discussed.
Shared determinants of receptor binding for subtype selective, and dual endothelin‐angiotensin antagonists on the AT<sub>1</sub> angiotensin II receptor (1998)

Site-directed interspecies amino acid exchange was used to compare the binding determinants of a novel dual endothelial-angiotensin receptor ligand, L-746,072, with type-1 angiotensin receptor (AT1) selective antagonists on AT receptors expressed in COS cells. These studies suggest that residues on AT receptors which are non-conserved between amphibian and mammalian species play a greater role in subtype selective ligand recognition than for dual receptor ligands. These data also support the hypothesis that a common non-peptide binding site exists within transmembrane domains on peptidergic receptors.
Data Transfer Nodes for Cloud-Storage Providers (2016)

We provide a case study of current inefficiencies in how traffic to well-known cloud-storage providers (e.g., Dropbox, Google Drive, Microsoft OneDrive) can vary significantly in throughput (e.g., a factor of 5 or more) depending on the location of the source and sink of the data. Our case study supplements previous work on resilient overlay networks (RON) and other related ideas. These inefficiencies exist in the presence of vendor-specific points-of-presence (POP), which try to provide better network performance to the clients. In fact, the existence of special-purpose networks (e.g., national research networks, PlanetLab) and complicated peering relationships between networks, means that performance problems might exist in many wide-area networks (WANs). Our main contribution is to continue the cataloging of network inefficiencies so that practitioners and experimenters are aware of them. But, we also show how simple routing detours, can improve throughput by factors of over 3x for client-to-cloud-storage. Routing detours are implemented by adding intermediate nodes in the routing path. These special-purpose intermediate nodes are called data transfer nodes (DTNs). We have also implemented an optimization in these DTNs in the form of cut-through routing. Although the specific inefficiencies in this paper might be transitory (and we agree with that characterization), WAN bottlenecks due to routing, sub-optimal middlebox configuration, and congestion persist as real problems to be cataloged, discussed, and addressed through the use of detours, or data transfer nodes (DTNs), or RONs. Additionally, we provide a brief overview of the beneficial routing detours in 20 PlanetLab nodes in North America.
ChemInform Abstract: Asymmetric Synthesis of (+)‐Morphine. The Phenanthrene Route Revisited. (1997)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.
Metallopeptidase inhibitors induce an up-regulation of endothelin-converting enzyme levels and its redistribution from the plasma membrane to an intracellular compartment (1996)

Endothelin-converting enzyme is a phosphoramidon-sensitive membrane metallopeptidase that catalyses the final step in biosynthesis of the potent vasoactive endothelin peptides. Immunomagnetic separation technology and immunohistochemistry have been used to demonstrate the co-localisation of endothelin-converting enzyme with the established ectoenzyme, aminopeptidase N, on the surface of endothelial cells. Unlike aminopeptidase N, however, endothelin-converting enzyme is seen to associate in clusters on the plasma membrane which can be distinguished from caveolae both biochemically and immunologically. Pre-treatment of endothelial cells with the metallopeptidase inhibitors phosphoramidon or thiorphan in the range 0.01-100 microM produced a dose-dependent increase in the levels of endothelin-converting enzyme protein and its accumulation in an intracellular compartment. No corresponding change in the levels of endothelin-converting enzyme-1 mRNA was detected under these conditions, nor in the levels of the closely related metalloenzyme, endopeptidase-24.11. The phosphoramidon and thiorphan-dependent increase is not due to direct inhibition of endothelin-converting enzyme not endopeptidase-24.11 but, rather, to an inhibition of the selective turnover of endothelin-converting enzyme protein.
Melt-processed all-polymer distributed Bragg reflector laser (2008)

We have assembled and studied melt-processed all-polymer lasers comprising distributed Bragg reflectors that were fabricated in large sheets using a co-extrusion process and define the cavities for dye-doped compression-molded polymer gain core sheets. Distributed Bragg reflector (DBR) resonators consisting of 128 alternating poly(styrene) (PS) and poly(methyl methacrylate) (PMMA) layers were produced by multilayer co-extrusion. Gain media were fabricated by compression-molding thermoplastic host poly notmers doped with organic laser dyes. Both processing methods can be used in high-throughput roll-to-roll manufacturing. Optically pumped DBR lasers assembled from these components display single and multimode lasing in the reflection band of the resonators, with a slope efficiency of nearly 19% and lasing thresholds as low as 90microJ/cm(2). The lasing wavelength can be controlled via the layer thickness of the DBR resonator films, and variation of the laser dye. Studies of threshold and efficiency are in agreement with models for end-pumped lasers.
Palladium Catalysts Synthesized by Atomic Layer Deposition for Methanol Decomposition (2010)

Atomic layer deposition (ALD) palladium films were deposited at 200 °C on various ALD metal oxide surfaces using sequential exposures to Pd(II) hexafluoroacetylacetonate (Pd(hfac)2) and formalin. In situ quartz crystal microbalance measurements as well as ex situ measurements performed on planar substrates revealed that the Pd growth begins with a relatively slow nucleation process and accelerates once an adequate amount of Pd has deposited on the surface. Furthermore, the Pd nucleation is faster on ALD ZnO surfaces compared to ALD Al2O3 surfaces. ALD was utilized to synthesize highly dispersed, uniform Pd nanoparticles (1 to 2 nm in diameter) on ALD ZnO and Al2O3 coated mesoporous silica gel, and the catalytic performances of these samples were compared in the methanol decomposition reaction. The ALD Pd−Al2O3 showed high activity and hydrogen selectivity at relatively low temperatures while the ALD Pd−ZnO showed very low activity as well as quick deactivation. In situ extended X-ray absorption fine structure (EXAFS) measurement revealed that the Pd supported on ZnO “dissolves” into the substrate during the methanol decomposition reaction which accounts for the gradual disappearance of its catalytic activity. By applying one cycle of ALD Al2O3 on top of the Pd−ZnO catalyst, the activity was enhanced and the catalyst deactivation was mitigated. This Al2O3 overcoating method stabilizes the Pd−ZnO and effectively prevents the dissolution of Pd into the ZnO substrate.
Enzyme immunoassay for anti-hepatitis B core (HBc) immunoglobulin G1 and significance of low-level results in competitive assays for anti-HBc (1989)

An enzyme immunoassay (EIA) for anti-hepatitis B core (HBc) immunoglobulin G1 (IgG1) was compared with a commercial radioimmunoassay (RIA) for anti-HBc antibody (Corab: Abbott Laboratories, North Chicago, Ill.). In parallel tests of 445 consecutive samples, discrepant results were obtained with 2 samples, 1 of which was positive only by the RIA and the other of which was positive only by the EIA for anti-HBc IgG1. In tests of another 192 samples with low blocking activity in the RIA (inhibition range, 90 to 30%), 10 samples gave discrepant results, 5 of which were positive only by the RIA and the other 5 of which were positive only by the EIA for anti-HBc IgG1. Of 12 samples with discrepant results, 11 samples were tested further for anti-HBc IgG3, IgM, and IgA1 by the EIA. Of these, seven samples were positive for anti-HBc IgG1, anti-HBc IgG3, or both. All seven samples were also positive for anti-hepatitis B surface (HBs) antigen. Three samples were negative for anti-HBc IgG1, anti-HBc IgG3, or both but were positive for anti-HBc IgM, anti-HBc IgA1, or both; and one sample was reactive only in the RIA. These four samples were all negative for anti-HBs. Thus, low-level results in the RIA caused by anti-HBc IgM, anti-HBc IgA, or both reflect the unspecific activation of immature B lymphocytes that is not related to previous exposure to hepatitis B virus (HBV). In contrast, the presence of anti-HBc IgG1, anti-HBc IgG3, or both indicates differentiated anti-HBc IgG-producing plasma cells and previous exposure to HBV, as was also shown by the presence of anti-HBs. On class and subclass determination for confirmation of positivity for anti-HBc in 19 serum samples, which was identified by screening of blood from 1,343 donors by a competitive EIA (Hepanostika; Organon), 9 samples with positive results, all low level, did not indicate previous exposure to HBV. It was concluded that determination of classes and subclasses of anti-HBc provides a tool for discriminating positive anti-HBc results not caused by HBV exposure.
Coal slurry fuel technology (1987)

Abstract Volatile oil markets experienced in the seventies have promoted renewed interest in coal‐based fuel technologies. Coal‐slurry fuels have emerged as viable technical alternatives for oil and gas in utility and industrial boilers. Despite current low prices and the abundance of oil, concerns over its long‐term availability and price, as well as strategic considerations, make coal‐slurry technology attractive. Initially, coal‐slurry fuels were based on coal‐oil mixtures, now the emphasis is largely on coal‐water fuels. This review assesses the status of the relevant technology. It covers the preparation of coal‐slurry fuels, slurry properties, combustion characteristics, emissions, current applications and concludes with their future outlook.
Fully-Differential 13 Gbps Clock Recovery Circuit for OC-255 SONET Applications (2005)

A fully differential, quasi-mixer based, half-rate clock recovery PLL has been implemented in a 0.18-/spl mu/m CMOS technology, and is optimized for high-speed of operation at 13 Gbit/s. A special differential varactor tuning arrangement is used to provide a wide operating frequency range from 6.2 GHz to 7.2 GHz, with a power consumption of 69 mW.
Glutathione synthesis is essential for mouse development but not for cell growth in culture (2000)

Glutathione (GSH) is a major source of reducing equivalents in mammalian cells. To examine the role of GSH synthesis in development and cell growth, we generated mice deficient in GSH by a targeted disruption of the heavy subunit of gamma-glutamylcysteine synthetase (gammaGCS-HS(tm1)), an essential enzyme in GSH synthesis. Embryos homozygous for gammaGCS-HS(tm1) fail to gastrulate, do not form mesoderm, develop distal apoptosis, and die before day 8.5. Lethality results from apoptotic cell death rather than reduced cell proliferation. We also isolated cell lines from homozygous mutant blastocysts in medium containing GSH. These cells also grow indefinitely in GSH-free medium supplemented with N-acetylcysteine and have undetectable levels of GSH; further, they show no changes in mitochondrial morphology as judged by electron microscopy. These data demonstrate that GSH is required for mammalian development but dispensable in cell culture and that the functions of GSH, not GSH itself, are essential for cell growth.
Homogeneous Asymmetric Catalysis (1966)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomogeneous Asymmetric CatalysisJohn C. Sheehan and D. H. HunnemanCite this: J. Am. Chem. Soc. 1966, 88, 15, 3666–3667Publication Date (Print):August 1, 1966Publication History Published online1 May 2002Published inissue 1 August 1966https://pubs.acs.org/doi/10.1021/ja00967a049https://doi.org/10.1021/ja00967a049research-articleACS PublicationsRequest reuse permissionsArticle Views1821Altmetric-Citations165LEARN 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
Narrowband active noise control using adaptive delay filter (1998)

An adaptive delay filter (ADF) consisting of one variable delay and gain is developed for narrowband active noise control. The ADF estimates the time delay and the gain difference between the primary and secondary paths at a given frequency. Multiple ADF systems are connected in parallel to control periodic noise with several narrowband components. Theoretical analysis shows that the amount of noise reduction is determined by the delay difference and the sampling rate.
ChemInform Abstract: The Azomethine Imine Route to Guanidines. Total Synthesis of (±)‐Saxitoxin. (1986)

Abstract The interaction of carboxylic hydrazides such as (II) [obtained by a multi‐step reaction sequence starting from (I)] with aldehyde acetals such as (III) produces azomethine imines, i.e. fused‐ring pyrazolidine derivatives such as (IV).
The Distribution of the Size of the Maximum Cluster of Points on a Line (1965)

Abstract N points are independently drawn from the uniform distribution on (0, 1). Denote by E(n|N; p), the event: There exists a subinterval of (0, 1) of length p that contains at least n out of the N points. We find the probability, P(n|N; p), of E(n|N; p) for n>N/2 in terms of simple tabulated quantities.
Advances in iterative non-uniformity correction techniques for infrared scene projection (2015)

Santa Barbara Infrared (SBIR) is continually developing improved methods for non-uniformity correction (NUC) of its Infrared Scene Projectors (IRSPs) as part of its comprehensive efforts to achieve the best possible projector performance. The most recent step forward, Advanced Iterative NUC (AI-NUC), improves upon previous NUC approaches in several ways. The key to NUC performance is achieving the most accurate possible input drive-to-radiance output mapping for each emitter pixel. This requires many highly-accurate radiance measurements of emitter output, as well as sophisticated manipulation of the resulting data set. AI-NUC expands the available radiance data set to include all measurements made of emitter output at any point. In addition, it allows the user to efficiently manage that data for use in the construction of a new NUC table that is generated from an improved fit of the emitter response curve. Not only does this improve the overall NUC by offering more statistics for interpolation than previous approaches, it also simplifies the removal of erroneous data from the set so that it does not propagate into the correction tables. AI-NUC is implemented by SBIR’s IRWindows4 automated test software as part its advanced turnkey IRSP product (the Calibration Radiometry System or CRS), which incorporates all necessary measurement, calibration and NUC table generation capabilities. By employing AI-NUC on the CRS, SBIR has demonstrated the best uniformity results on resistive emitter arrays to date.
<i>Bmpr1a</i> and <i>Bmpr1b</i> have overlapping functions and are essential for chondrogenesis <i>in vivo</i> (2005)

Previous studies have demonstrated the ability of bone morphogenetic proteins (BMPs) to promote chondrogenic differentiation in vitro. However, the in vivo role of BMP signaling during chondrogenesis has been unclear. We report here that BMP signaling is essential for multiple aspects of early chondrogenesis. Whereas mice deficient in type 1 receptors Bmpr1a or Bmpr1b in cartilage are able to form intact cartilaginous elements, double mutants develop a severe generalized chondrodysplasia. The majority of skeletal elements that form through endochondral ossification are absent, and the ones that form are rudimentary. The few cartilage condensations that form in double mutants are delayed in the prechondrocytic state and never form an organized growth plate. The reduced size of mutant condensations results from increased apoptosis and decreased proliferation. Moreover, the expression of cartilage-specific extracellular matrix proteins is severely reduced in mutant elements. We demonstrate that this defect in chondrocytic differentiation can be attributed to lack of Sox9, L-Sox5, and Sox6 expression in precartilaginous condensations in double mutants. In summary, our study demonstrates that BMPR1A and BMPR1B are functionally redundant during early chondrogenesis and that BMP signaling is required for chondrocyte proliferation, survival, and differentiation in vivo.
N-bit fully covered variable photonic time delay architectures for polarization mode dispersion compensation (2005)

N-bit programmable photonic time delay structures are proposed for the compensation of polarization mode dispersion (PMD). Our key design idea is to have one switchable differential group delay (DGD) module, that specially contains the zero DGD and the minimum DGD resolution step of t, connected to the rest of the variable photonic DGD bit modules that offer DGD values of (+/-)2t to (+/-)[2<sup>N-2</sup>]t. Our proposed variable photonic DGD architectures use 2x2 polarization maintaining optical switches or 90 degree polarization rotators to choose the desired DGDs. When all variable photonic DGD bit modules are attached to the polarization rotator, 2<sup>N</sup> DGD values ranging from -{[2<sup>N-1</sup>]-1}t to [2<sup>N-1</sup>]t are obtained. Our simulation study points out that compact programmable photonic DGD modules can be achieved by using materials with strong birefringence and our reflective configuration. In addition, materials with low wavelength sensitivity are preferred for use in broadband wavelength operation. Mirror-based programmable photonic DGD structures are also introduced.
Methylation of p15INK4b and Expression of ANRIL on Chromosome 9p21 Are Associated with Coronary Artery Disease (2012)

p15(INK4b) methylation is associated with CAD and ANRIL expression. The epigenetic changes in p15(INK4b) methylation and ANRIL expression may involve in the mechanisms of chromosome 9p21 on CAD development.
Fiber-optic sensor systems lor industrial monitoring applications (1984)

Optical sensing systems with the architecture shown schematically in Fig. 1 are being evaluated for use in research and industrial applications. An electrooptic multiplexer is used to direct radiation from a tunable laser to any of a number of remotely located fiber-optic probes. This enables a single laser to probe simultaneously multiple locations. The light travels to the fiber-optic sensor, interacts with the environment, and returns via another optical fiber. The signal is then optically demultiplexed and preprocessed before conversion to digital form and acquisition by a computer (which may form part of an active feedback loop).
MARINE APPLICATION OF MAGNUS EFFECT DEVICES (1985)

ABSTRACT The Magnus effect is an induced, very high lift phenomenon that has been used for wind propulsion of ships as early as 1924. More recently, this unique lift principle has been used for steering towboats. Recent research has indicated that Magnus effect roll stabilizers, water propellers, and air and water generators may be both feasible and have greater efficiency than traditional designs. The paper explains the Magnus effect, reviews the history of the Magnus effect, reviews current marine applications including the work of investigators in Germany, France, Sweden and Russia, discusses in detail Magnus effect rotor design, and proposes auxiliary wind propulsion Magnus effect devices for single screw oilers.