gebhart/patrepeval huggingface dataset:
Feed array metrology and correction layer for large antenna systems in ASIC mixed signal technology (2014)

The paper deals with a possible use of the feed array present in a large antenna system, as a layer for measuring the antenna performance with a self-test procedure and a possible way to correct residual errors of the Antenna geometry and of the antenna distortions. Focus has been concentrated on a few key critical elements of a possible feed array metrology program. In particular, a preliminary contribution to the design and development of the feed array from one side, and the subsystem dedicated to antenna distortion monitoring and control from the other, have been chosen as the first areas of investigation. Scalability and flexibility principles and synergic approach with other coexistent technologies have been assumed of paramount importance to ensure ease of integrated operation and therefore allowing in principle increased performance and efficiency. The concept is based on the use of an existing feed array grid to measure antenna distortion with respect to the nominal configuration. Measured data are then processed to develop a multilayer strategy to control the mechanical movable devices (when existing) and to adjust the residual fine errors through a software controlled phase adjustment of the existing phase shifter The signal from the feed array is converted passing through a FPGA/ASIC level to digital data channels. The kind of those typically used for the scientific experiments. One additional channel is used for monitoring the antenna distortion status. These data are processed to define the best correction strategy, based on a software managed control system capable of operating at three different levels of the antenna system: reflector rotation layer, sub reflector rotation and translation layer (assuming the possibility of controlling a Stewart machine), phase shifter of the phased array layer. The project is at present in the design phase, a few elements necessary for a sound software design of the control subsystem have been developed at a technological demonstrator level while the ASIC board for generating the digital data stream has been fully developed. A prototype for control accurately the position of the sub-reflector up to a diameter of 5 meters (similar to the sub reflector size of a large antenna) using a Stewart mechanism is being planned. The selection strategy of the correction modes will depend on the dynamics of the phased array (i.e. the available bits of the A/D conversion). The reaction time allowed for the correction, depending on the error type and the inertia of the sub systems. Typically, the compensation can be divided among all the adjusting elements.
Complex fluoro anions in solution. I. Homo- and heteropolyfluoro anions of niobium and tantalum (1973)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex fluoro anions in solution. I. Homo- and heteropolyfluoro anions of niobium and tantalumS. BrownsteinCite this: Inorg. Chem. 1973, 12, 3, 584–589Publication Date (Print):March 1, 1973Publication History Published online1 May 2002Published inissue 1 March 1973https://pubs.acs.org/doi/10.1021/ic50121a018https://doi.org/10.1021/ic50121a018research-articleACS PublicationsRequest reuse permissionsArticle Views234Altmetric-Citations34LEARN 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
Indium doped cadmium sulfide films deposited by cylindrical magnetron reactive sputtering (1981)

Cadmium sulfide coatings about 500 nm thick were deposited by reactive sputtering onto borosilicate glass substrates at temperatures in the range 150°–350° C using pure and In-doped Cd cylindrical magnetron sputtering sources. The working gas was Ar–H2S with various H2S injection rates. Deposition rates were ∠1 nm/s. Adatom desorption was found to limit the cadmium sulfide accumulation rate to the extent to which the Cd could interact with the S to produce CdS. Consequently, the undoped deposits were nearly stoichiometric, with resistivities of ∠104 Ω cm. The resistivities of the doped coatings were found to be critically dependent on the H2S injection rate, apparently because of compensation by Cd vacancies. Resistivities in a range 0.1–5 Ω cm, suitable for Cu2S/CdS solar cells, were obtained for target doping levels of 0.1–1 at.% when the deposition flux was rich in Cd. Higher H2S injection rates yielded resistivities in the range 103 Ω cm. Electron Hall mobilities ranged from 2 to 15 cm2/V s in the doped CdS to 20 cm2/V s in the undoped material.
A PNA<sub>4</sub> Quadruplex (2004)

A tetrameric PNA, TGGG, has been shown to form an intermolecular G-quadruplex. Nanoelectrospray mass spectrometry, combined with solution-phase H/D exchange, established formation of a specific tetramolecular complex. UV melting studies show that this complex undergoes a quadruplex melting transition. This is a novel four-stranded structure that offers the gross structural features of a DNA quadruplex, but without the negatively charged backbone.
Nanoscale Similarities in the Substructure of the Exines ofFagusPollen Grains andLycopodiumSpores (1998)

The exine substructure of an angiosperm, Fagus syl atica (beech) pollen and a pteridophyte, Lycopodium cla atum (a club moss) spore was investigated by scanning tunnelling microscopy. These pollen and spores, despite their distinct differences in structure and morphology on a micrometre scale, have very similar substructure on a nanometre scale. The substructure appears to consist of a multi-helix, i.e. a helical chain in turn wound into a helix with a self-similarity at smaller and smaller length scales. A simple vectorial form is proposed to describe quantitatively the multi-helical substructure.
Incretin hormones and beta-cell mass expansion: what we know and what is missing? (2013)

Pancreatic beta-cell mass expands through beta-cell proliferation and neogenesis while it decreases mainly via apoptosis. The loss of balance between beta-cell death and regeneration leads to a reduction of beta-cell functional mass, thus contributing to the pathogenesis of type 2 diabetes mellitus (T2DM). The pathogenetic mechanisms causing T2DM are complex, and also include a significant reduction of the incretin effect. A better understanding of the role of incretin hormones in glucose homeostasis has led to the development of incretin-based therapies. Recently, incretin hormones have been shown to stimulate the beta-cell growth and differentiation from pancreas-derived stem/progenitor cells, as well as to exert cytoprotective, antiapoptotic effects on beta-cells. However, the role and the molecular mechanisms by which GLP-1 and its agonists regulate beta-cell mass have not been fully investigated. This review focuses the current findings and the missing understanding of the effects of incretin hormones on beta-cell mass expansion.
Improving the operational conditions for the sucker-rod pumping system (2009)

In this work a new perspective of a sucker-rod pumping system control is presented. The strategy consists in associating the bottom hole pressure measurement and dynamometer cards analysis in a cascaded control. In the proposal, the widely applied control strategies based on dynamometer cards are combined with the strategy based on the measurement of the bottom hole pressure, since the development of low cost downhole sensors turned possible the measurement of downhole variables. The simulation results are analyzed in order to evaluate the operational conditions propitiated by the sucker-rod pumping cascaded control, in a hardware in the loop platform.
A Reconfigurable Auto-Loop Microgrid (2015)

This letter proposes a novel reconfigurable auto-loop microgrid (ALMG). The new configuration combines the advantages of auto-loops and microgrids. In addition, the ALMG offers the possibility of balancing loads for economic operation.
MLP aware heterogeneous memory system (2011)

Main memory plays a critical role in a computer system's performance and energy efficiency. Three key parameters define a main memory system's efficiency: latency, bandwidth, and power. Current memory systems tries to balance all these three parameters to achieve reasonable efficiency for most programs. However, in a multi-core system, applications with various memory demands are simultaneously executed. This paper proposes a heterogeneous main memory with three different memory modules, where each module is heavily optimized for one the three parameters at the cost of compromising the other two. Based on the memory access characteristics of an application, the operating system allocates its pages in a memory module that satisfies its memory requirements. When compared to a homogeneous memory system, we demonstrate through cycle-accurate simulations that our design results in about 13.5% increase in system performance and a 20% improvement in memory power.
Caffeine and Activation Theory (2006)

Arousal and Caffeine: Physiological, Behavioral, and Pathological Effects Barry D. Smith, Uma Gupta, and B. S. Gupta Caffeine: The Drug The Arousal Drug of Choice: Sources and Consumption of Caffeine Barry D. Smith, Thom White, and Rachel Shapiro Pharmacological Properties and Neurophysiological Effects of Caffeine Astrid Nehlig Cardiovascular Effects Acute Cardiovascular Effects of Caffeine: Hemodynamics and Heart Function Barry D. Smith and Katherine Aldridge The Multifactorial Model of Cardiovascular Pathology: Is Caffeine Pathogenic in Coronary Heart Disease? Barry D. Smith, Radha Gholkar, Mark Mann, and Nancy Toward Blood Pressure Effects of Dietary Caffeine Are a Risk for Cardiovascular Disease Jack E. James Effects of Coffee and Caffeine Consumption on Serum Lipids and Lipoproteins Ming Wei and Harvey A. Schwertner Menstrual and Reproductive Effects Menstrual Endocrinology and Pathology: Caffeine, Physiology, and PMS Hoa T. Vo, Barry D. Smith, and Solmaz Elmi Effects of Caffeine Intake on Female Fertility: A Critical Review Kate Northstone and Jean Golding Mood and Performance and Psychopathology Effects of Caffeine on Mood Hendrik J. Smit and Peter J. Rogers Caffeine, Mood, and Performance: A Selective Review Lorenzo D. Stafford, Jennifer Rusted, and Martin R. Yeomans Caffeine and Multicomponent Task Performance Uma Gupta and B. S. Gupta Caffeinism: History, Clinical Features, Diagnosis, and Treatment Iulian Iancu, Ahikam Olmer, and Rael D. Strous Green and Black Teas Catechins and Caffeine in Tea: A Review of Health Risks and Benefits Raymond Cooper, Talash A. Likimani, D. James Morre, and Dorothy M. Morre Integration and Conclusion Caffeine, Physiology, Pathology, and Behavior Barry D. Smith, Uma Gupta, and B. S. Gupta
Enzymes from Higher Eukaryotes for Industrial Biocatalysis (2004)

The industrial production of fine chemicals, feed and food ingredients, pharmaceuticals, agrochemicals and their respective intermediates relies on an increasing application of biocatalysis, i.e. on enzyme or whole-cell catalyzed conversions of molecules. Simple procedures for discovery, cloning and over-expression as well as fast growth favour fungi, yeasts and especially bacteria as sources of biocatalysts. Higher eukaryotes also harbour an almost unlimited number of potential biocatalysts, although to date the limited supply of enzymes, the high heterogeneity of enzyme preparations and the hazard of infectious contaminants keep some interesting candidates out of reach for industrial bioprocesses. In the past only a few animal and plant enzymes from agricultural waste materials were employed in food processing. The use of bacterial expression strains or non-conventional yeasts for the heterologous production of efficient eukaryotic enzymes can overcome the bottleneck in enzyme supply and provide sufficient amounts of homogenous enzyme preparations for reliable and economically feasible applications at large scale. Ideal enzymatic processes represent an environmentally friendly, »near-to-completion« conversion of (mostly non-natural) substrates to pure products. Recent developments demonstrate the commercial feasibility of large-scale biocatalytic processes employing enzymes from higher eukaryotes (e.g. plants, animals) and also their usefulness in some small-scale industrial applications.
Overcoming Hadoop Scaling Limitations through Distributed Task Execution (2015)

Data driven programming models like MapReduce have gained the popularity in large-scale data processing. Although great efforts through the Hadoop implementation and framework decoupling (e.g. YARN, Mesos) have allowed Hadoop to scale to tens of thousands of commodity cluster processors, the centralized designs of the resource manager, task scheduler and metadata management of HDFS file system adversely affect Hadoop's scalability to tomorrow's extreme-scale data centers. This paper aims to address the YARN scaling issues through a distributed task execution framework, MATRIX, which was originally designed to schedule the executions of data-intensive scientific applications of many-task computing on supercomputers. We propose to leverage the distributed design wisdoms of MATRIX to schedule arbitrary data processing applications in cloud. We compare MATRIX with YARN in processing typical Hadoop workloads, such as WordCount, TeraSort, Grep and RandomWriter, and the Ligand application in Bioinformatics on the Amazon Cloud. Experimental results show that MATRIX outperforms YARN by 1.27X for the typical workloads, and by 2.04X for the real application. We also run and simulate MATRIX with fine-grained sub-second workloads. With the simulation results giving the efficiency of 86.8% at 64K cores for the 150ms workload, we show that MATRIX has the potential to enable Hadoop to scale to extreme-scale data centers for fine-grained workloads.
Investigation of neutral endopeptidases (EC 3.4.24.11) and of neutral proteinases (EC 3.4.24.4) using a new sensitive two‐stage enzymatic reaction (1989)

A sensitive two-stage enzymatic reaction for mammalian and bacterial metalloendopeptidases has been developed using the substrate 3-carboxypropanoyl-alanyl-alanyl-leucine-4-nitroanilide supplemented with Streptomyces griseus amino-peptidase. Neutral endopeptidase EC 3.4.24.11 from bovine kidney hydrolyzes the substrate (pH 7.5, 25 degrees C) with a catalytic efficiency (kcat = 1.2 x 10(2) s-1, Km = 0.15 mM) of the highest ever reported for the enzyme acting on synthetic chromophoric and fluorogenic substrates. Thermolysin hydrolyzes the substrate at a faster rate (kcat = 1.2 x 10(3) s-1) but the overall efficiency is diminished by a higher Km (4.2 mM). Suspensions of human neutrophil cells and culture filtrates of Bacillus cereus have been assayed sensitively for their neutral endopeptidases and neutral proteinase activities, respectively. The assay provides a convenient tool for the kinetic investigation of neutral endopeptidases and neutral proteinases and for assessing their function in biological systems.
A divide-by-three regenerative frequency divider using a subharmonic mixer (2011)

A regenerative frequency divider topology is used with a ×2 subharmonic mixer to realize a divide-by-three frequency divider. The circuit accepts input signals in the range of 5.2 GHz to 5.5 GHz and produces signals from 1.73 GHz to 1.83 GHz. Measured results show a maximum conversion gain of 0 dB and at least a 30 dB suppression of all undesired harmonic components at the output. The circuit core consumes 44 mW of dc power and ideas are provided on how to reduce the power draw. The chip was fabricated on a standard 0.13-μm CMOS process and it occupies an area of 1.0 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> including bonding pads.
The vitamin A-storing cells in the human and rat pancreas. (1990)

Vitamin A-storing cells with lipid droplets and fluorescence characteristic of vitamin A were observed in the normal human and rat pancreas, using light, fluorescence, and electron microscopy. Vitamin A-storing cells in the normal human pancreas, as well as in the rat pancreas, were located predominantly in a perivascular area, and had lipid droplets with a fluorescence characteristic of vitamin A, Pancreatic vitamin A-storing cells had more numerous jipid droplets and more distinct fluorescence of vitamin A in vitamin A-loaded rats than in normal rats. In the rat, hepatic vitamin A-storing cells contained significantly more lipid droplets and had more distinct vitamin A fluorescence than pancreatic vitamin A-storing cells. Pancreatic sections from human subjects with chronic alcoholic pancreatitis revealed abundant vitamin A-storing cells surrounded by collagen fibers in an area of fibrosis. These results indicate that vitamin A-storing cells are widely distributed in the normal human and rat pancreas, although pancreatic vitamin A-storing cells have less storage capacity for vitamin A than do hepatic cells. Vitamin A-storing cells, as well as fibroblasts, may participate in the development of pancreatic fibrosis in chronic alcoholic pancreatitis, similar to the way hepatic vitamin A-storing cells participate in hepatic fibrosis.
Divergent functions of the proneural genes <i>Mash1</i> and <i>Ngn2</i> in the specification of neuronal subtype identity (2002)

The neural bHLH genes Mash1 and Ngn2 are expressed in complementary populations of neural progenitors in the central and peripheral nervous systems. Here, we have systematically compared the activities of the two genes during neural development by generating replacement mutations in mice in which the coding sequences of Mash1 and Ngn2 were swapped. Using this approach, we demonstrate that Mash1 has the capacity to respecify the identity of neuronal populations normally derived from Ngn2-expressing progenitors in the dorsal telencephalon and ventral spinal cord. In contrast, misexpression of Ngn2 in Mash1-expressing progenitors does not result in any overt change in neuronal phenotype. Taken together, these results demonstrate that Mash1 and Ngn2 have divergent functions in specification of neuronal subtype identity, with Mash1 having the characteristics of an instructive determinant whereas Ngn2 functions as a permissive factor that must act in combination with other factors to specify neuronal phenotypes. Moreover, the ectopic expression of Ngn2 can rescue the neurogenesis defects of Mash1 null mutants in the ventral telencephalon and sympathetic ganglia but not in the ventral spinal cord and the locus coeruleus, indicating that Mash1 contribution to the specification of neuronal fates varies greatly in different lineages, presumably depending on the presence of other determinants of neuronal identity.
Science in motion: common molecular pathological themes emerge in the hereditary spastic paraplegias: Table 1 (2003)

The hereditary spastic paraplegias are a group of neurodegenerative conditions that all share the principal clinical feature of progressive lower limb spastic paralysis, caused by either failure of development or progressive degeneration of the corticospinal tract. The conditions are characterised by extreme genetic heterogeneity, with at least 20 genes involved. Until recently, no functional overlap was apparent in the associated molecular pathological mechanisms. However, with recent progress in hereditary spastic paraplegia gene identification, common pathological themes are now emerging.
The location of inhibitory specificities in human mucus proteinase inhibitor (MPI): separate expression of the COOH-terminal domain yields an active inhibitor of three different proteinases (1990)

Human mucus proteinase inhibitor (MPI) consists of 107 amino acids arranged in two domains showing high homology to each other. This protein is an inhibitor of different serine proteinases including trypsin, chymotrypsin, leukocyte elastase and cathepsin G. On the basis of sequence comparisons it has been suggested that the first domain inhibits trypsin, whereas the second one was thought to be active against chymotrypsin and elastase. To prove the location of the different inhibitory activities gene fragments for both domains have been cloned separately and expressed in Escherichia coli. Inhibition assays with the isolated recombinant domains showed that the second domain is active against chymotrypsin, neutrophil elastase and trypsin, whereas for the first domain only a weak activity against trypsin could be detected. These results suggest that the inhibitory activities of the native molecule towards these three proteinases are all located in the second domain.
Vena Cavography with CO<sub>2</sub>versus with Iodinated Contrast Material for Inferior Vena Cava Filter Placement: A Prospective Evaluation (2000)

CO(2) cavography is well tolerated, safe, and adequate for identification of the parameters necessary for filter deployment. It is especially valuable in patients with a history of reaction to iodinated contrast material or renal insufficiency.
A cost-benefit analysis of a cardiovascular disease prevention trial, using folate supplementation as an example. (1998)

This study illustrates how Bayesian methods may help in assessing the societal cost-benefit consequences of proposed disease prevention trials, deciding which trials are worth sponsoring, and designing cost-effective trials.
Normal Establishment of Epithelial Tight Junctions in Mice and Cultured Cells Lacking Expression of ZO-3, a Tight-Junction MAGUK Protein (2006)

ZO-1, ZO-2, and ZO-3 are closely related MAGUK family proteins that localize at the cytoplasmic surface of tight junctions (TJs). ZO-1 and ZO-2 are expressed in both epithelia and endothelia, whereas ZO-3 is exclusively expressed in epithelia. In spite of intensive studies of these TJ MAGUKs, our knowledge of their functions in vivo, especially those of ZO-3, is still fragmentary. Here, we have generated mice, as well as F9 teratocarcinoma cell lines, that do not express ZO-3 by homologous recombination. Unexpectedly, ZO-3(-/-) mice were viable and fertile, and rigorous phenotypic analyses identified no significant abnormalities. Moreover, ZO-3-deficient F9 teratocarcinoma cells differentiated normally into visceral endoderm epithelium-like cells in the presence of retinoic acid. These cells had a normal epithelial appearance, and the molecular architecture of their TJs did not appear to be affected, except that TJ localization of ZO-2 was upregulated. Suppression of ZO-2 expression by RNA interference in ZO-3(-/-) cells, however, did not affect the architecture of TJs. Furthermore, the speed with which TJs formed after a Ca(2+) switch was indistinguishable between wild-type and ZO-3(-/-) cells. These findings indicate that ZO-3 is dispensable in vivo in terms of individual viability, epithelial differentiation, and the establishment of TJs, at least in the laboratory environment.