gebhart/patrepeval huggingface dataset:
Current-source charge-pump power-factor-correction electronic ballast (1998)

A current-source charge-pump power-factor-correction (CS-CPPFC) electronic ballast is presented in this paper. Unity-power-factor condition and principle of operation using the CP concept are derived and analyzed. Based on the steady-state analysis, the design considerations are discussed in detail. It is shown that the power switch only deals with the resonant load current, which is the same as in the two-stage approach so that small-current rating devices can be used. The developed CS-CPPFC electronic ballast can save one inductor and has a potentially low cost. The CS-CP electronic ballast with switching frequency modulation to improve crest factor is developed, implemented, and tested. It is shown that 0.99 power factor, 11.3% total harmonic distortion (THD), and 1.54 crest factor can be achieved for 85-W fluorescent lamps.
Gonadotropin-Releasing Hormone Deficiency in the Human (Idiopathic Hypogonadotropic Hypogonadism and Kallmann’s Syndrome): Pathophysiological and Genetic Considerations (1998)

I. Introduction II. Ontogeny of Normal GnRH Secretion A. Fetal life B. Neonatal and childhood periods C. Puberty D. Adulthood III. Historical Perspective IV. Clinical Presentation of GnRH Deficiency A. Congenital GnRH deficiency B. Adult-onset GnRH deficiency C. Variant or partial forms of GnRH deficiency D. Associated anomalies in KS E. Differential diagnosis V. Approaches to Studying GnRH Secretion A. Animal and in vitro studies B. Human studies VI. Patterns of GnRH Secretion in Men with GnRH Deficiency VII. Patterns of GnRH Secretion in Women with GnRH Deficiency VIII. Genetic Studies IX. X-Linked Genes Controlling GnRH Secretion A. Kallmann’s syndrome gene B. Adrenal hypoplasia congenita (AHC) gene product X. Autosomal Genes Controlling GnRH Secretion A. The genetics of autosomal inheritance B. GnRH gene C. GnRH receptor gene D. Other autosomal genes XI. Conclusion
Synthesis and Characterization of Diketopyrrolopyrrole‐based D‐π‐A‐π‐D Small Molecules for Organic Solar Cell Applications (2016)

Four new small molecules – CTDP , BCTDP , CFDP , and BCFDP having D‐π‐A‐π‐D molecular architecture, possessing carbazole and benzocarbazole as electron donors, diketopyrrolopyrrole core as acceptor and thiophene/furan acting as spacer/bridge between donor (carbazole and benzocarbazole) and acceptor (diketopyrrolopyrrole) units are synthesized. All the four compounds exhibited absorption in the range of 300 to 700 nm, and, in particular, more intense absorption found in the 500 to 660 nm region. The estimated band gaps are found to be 1.92 eV for CTDP, 1.92 eV for BCTDP, 1.94 eV for CFDP, and 1.92 eV for BCFDP from their intersection point of absorption and emission spectra. The electrochemical studies revealed that the highest occupied molecular orbital/lowest unoccupied molecular orbital energy levels of all the four compounds, CTDP (−5.03/−3.65 eV), BCTDP (−5.03/−3.65 eV), CFDP (−4.94/−3.65 eV), and BCFDP (−4.90/−3.62 eV) are well matched with PCBM and expected to be act as donor materials in small molecule bulk hetero junction organic solar cells. All the compounds are thermally stable up to 382–416°C.
Die Tablette: Handbuch der Entwicklung, Herstellung und Qualitätssicherung (2012)

The life of the tablet maker is not a happy one – wusste R.C. White bereits 1920.<br/><br/>Für eine erfolgreiche Tablettenfertigung ist dieses umfassend illustrierte Standard- und Referenzwerk unentbehrlich. Neben den Grundlagen werden verschiedene Vorgehensweisen mit ihren Vor- und Nachteilen sowie zahlreiche auf dem Markt befindliche Maschinen erläutert.<br/><br/>Aus dem Inhalt:<br/><br/>Tabletten: Eigenschaften und Standards<br/>Hilfsstoffe: eine Übersicht mit Anwendungsbeispielen<br/>Granulieren: Wie wird‘s gemacht? Welche Alternativen gibt es; was sind die Vor- und Nachteile<br/>Der Vorgang des Komprimierens: zum Verständnis der resultierenden Tabletteneigenschaften<br/>Tablettenpressen: Exzenter, Rundläufer und Spezialpressen – Gemeinsamkeiten und Unterschiede<br/>Tipps, Tricks & Kniffe: Bei Komplikationen lernen Sie hier die Ursachen und die Behebung von Problemen kennen.<br/>Tablettenprüfungen<br/>Bedrucken, Konfektionieren, Abfüllen, Verpacken und Lagern der fertigen Tabletten in der Tablettenfabrik.<br/>Expertenwissen in der 4., überarbeiteten und erweiterten Auflage 2022: unverzichtbar in Entwicklung, Fertigung und Qualitätsmanagement.
Cylindrical mirror with a controlled radius of curvature (1975)

It is shown experimentally that a cylindrical mirror can have a radius of curvature controlled by elastic deformation of its substrate.
Development testing of the cryogenic capillary pumped loop (1997)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Jane Baumann, Brent Cullimore, Ed Kroliczek, Jentung Ku; Development testing of the cryogenic capillary pumped loop. AIP Conf. Proc. 10 January 1997; 387 (1): 593–600. https://doi.org/10.1063/1.52052 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Risk of tuberculosis infection and disease associated with work in health care settings. (2007)

Tuberculosis (TB) in health care workers (HCWs) was not considered a serious problem following the advent of effective antibiotic therapy. Interest was re-stimulated by the occurrence of several major nosocomial outbreaks.We have reviewed the available published literature regarding prevalence and incidence of TB infection and disease among HCWs in countries categorised by mean income. We included studies published in English since 1960 from low- and middle-income countries (LMICs) and since 1990 from high-income countries (HICs). We excluded outbreak reports and studies based only on questionnaires.The median prevalence of latent TB infection (LTBI) in HCWs was 63% (range 33-79%) in LMICs and 24% in HICs (4-46%). Among HCWs from LMICs, LTBI was consistently associated with markers of occupational exposure, but in HICs it was more often associated with non-occupational factors. The median annual incidence of TB infection attributable to health care work was 5.8% (range 0-11%) in LMICs and 1.1% (0.2-12%) in HICs. Rates of active TB in HCWs were consistently higher than in the general population in all countries, although findings were variable in HICs. Administrative infection control measures had a modest impact in LMICs, yet seemed the most effective in HICs.TB remains a very important occupational risk for HCWs in LMICs and for workers in some institutions in HICs. Risk appears particularly high when there is increased exposure combined with inadequate infection control measures.
Improvement of Piezoelectric Properties of (K,Na)NbO<sub>3</sub> Films Deposited by Sputtering (2011)

(K,Na)NbO 3 (KNN) films with high transverse piezoelectric coefficients were successfully deposited onto Pt/Ti/SiO 2 /Si substrates by RF magnetron sputtering. These films were polycrystalline and had pseudo-cubic perovskite structures with preferential <001 > orientation. To improve their piezoelectric properties, we investigated the effects of annealing after the deposition and the Na/(K+ Na) ratio of the films. Annealing in air at 750 °C led to a decrease in the residual strain in the KNN crystal and the disappearance of openings at the grain boundary, thereby improving the transverse piezoelectric coefficient and leakage current properties. We also investigated the transverse piezoelectric coefficient and dielectric constant as a function of the Na/(K+ Na) ratio; both had maximum values at a ratio of approximately 0.55. For the KNN films, e 31 * ranged between -10.0 and -14.4 C/m 2 ; thus, it was superior to previously reported values for lead-free piezoelectric films and was comparable to the best commercially available Pb(Zr,Ti)O 3 films.
Low-dose CT denoising with convolutional neural network (2016)

To reduce the potential radiation risk, low-dose CT has attracted much attention. However, simply lowering the radiation dose will lead to significant deterioration of the image quality. In this paper, we propose a noise reduction method for low-dose CT via deep neural network without accessing original projection data. A deep convolutional neural network is trained to transform low-dose CT images towards normal-dose CT images, patch by patch. Visual and quantitative evaluation demonstrates a competing performance of the proposed method.
Development of the single nucleotide polymorphism marker of the wheat Lr1 leaf rust resistance gene. (2004)

The range of publicly available data on plant nucleotide sequences opens a new possibility in the design of SNP assays. The purpose of this study was to identify point mutations in genomic sequences closely linked to the Lr1 leaf rust resistance gene, and to develop SNP markers based on primer extension (SNuPE) facilitating efficient marker-based selection procedures, e.g. the pyramiding of resistance genes. Studies were performed on the panel of 37 wheat cultivars, the set of 41 Thatcher near-isogenic lines of spring wheat and on the 21 individuals derived from doubled-haploid (DH) lines derived from 'Henika' (Lr1) x 'IPG-SW-14'. A minisequencing reaction run with Lr1_98F primer detected four genotypes (T, C+T, C and "null") in the set of all Triticum aestivum varieties tested. In this study, it turned out that the T allele is associated with the Lr1 gene in a wide genetic background.
Self-Assembly and Stability of Hydrogen-Bonded Networks of Bridged Triphenylamines on Au(111) and Cu(111) (2015)

The adsorption, chemical nature, and self-assembly of diaminotriazinyl- and carboxyl-substituted triphenylamines with dimethylmethylene bridges were studied on Au(111) and Cu(111) at submonolayer coverage by low-temperature scanning tunneling microscopy and density functional theory. On Au(111), both molecules form extended porous honeycomb networks. The geometry of the networks agrees well with density functional theory optimized hydrogen-bonded gas phase structures. Therefore, the self-assemblies on Au(111) are strongly directed by intermolecular hydrogen bond interactions. In contrast, on Cu(111) both molecules aggregate in dense islands owing to the stronger molecule–surface interaction. While the carboxyl substituents partially deprotonate at room temperature on Cu(111), the diaminotriazinyl-substituted triphenylamines adsorb mainly intact. The diaminotriazinyl groups deprotonate gradually at increased adsorption temperatures.
Body fluid balance : exercise and sport (1996)

Control of Body Fluid Balance During Exercise Mechanisms Controlling Fluid Ingestion: Thirst and Drinking, J.E. Greenleaf and T. Morimoto Gastrointestinal Physiology During Exercise, C.V. Gisolfi and A.J. Ryan Hormonal Control of Body Fluid Volume, C.E. Wade The Kidney and Body Fluid Balance During Exercise, E.J. Zambraski Fluid and Electrolyte Balance of the Lung During Exercise, E.A. Birks and R.M. Effros Integrated Control of Body Fluid Balance During Exercise, P.C. Szlyk-Modrow, R.P. Francesconi, and R.W. Hubbard Environmental Influences on Body Fluid Balance During Exercise Body Fluid Balance During Exercise: Heat Exposure, M.N. Sawka, S.J. Montain, and W.A. Latzka Environmental Influences on Body Fluid Balance During Exercise: Cold Exposure, B.J. Freund and A.J. Young Environmental Influences on Body Fluid Balance During Exercise: Altitude, R.W. Hoyt and A. Honig Renal, Endocrine, and Hemodynamic Effects of Water Immersion in Humans, M. Epstein Special Considerations in Regard to Body Fluid Balance During Exercise Age, Gender, and Fluid Balance, M.D. Van Loan and R.A. Boileau Hormonal Control of Fluid Balance During Exercise Among Women, S.M. Fortney Fluid Replacement During Exercise and Recovery From Exercise, L.E. Armstrong and C.M. Maresh Effects of Acute Body Weight Loss in Weight Controlling Athletes, E.R. Buskirk and S.M. Puhl Clinical Complications of Body Fluid and Electrolyte Imbalance, J.P. Knochel
Wrinkling of a compressed elastic film on a viscous layer (2002)

A compressively strained elastic film bonded to a viscous layer can form wrinkles. The present study provides a theoretical model for the wrinkling process. The elastic film is modeled with the nonlinear theory of a thin plate subject to in-plane and out-of-plane loads. The flow of the viscous layer is modeled with the theory of lubrication. The interface between the elastic film and the viscous layer is assumed to be perfect with no slipping or debonding. A set of partial differential equations evolves the deflection and the in-plane displacements as functions of time. A linear stability analysis identifies the critical wave number, below which the elastic film is unstable and the wrinkles can grow. For any fixed wave number less than the critical wave number, the wrinkles reach a kinetically constrained equilibrium configuration, in which the stress is partially relaxed in the elastic film and the viscous layer stops flowing. Numerical simulations reveal rich dynamics of the system with many unstable equilibrium configurations.
Towards a two-layered video metadata model (2002)

We propose a model for video metadata that supports video retrieval based on video content, video structure and/or video attributes. Our model supports video retrieval based on the relationships among videos and between videos and real world objects. This model is also appropriate for providing personalization and recommendation functionality in video based services, while it takes into account events covered by more than one cameras. Our model is two-layered: in the first layer, a set of core classes appropriate for supporting any video type (e.g. news, movies, football matches, etc.) is defined; in the second layer, we define a set of classes, specific for each video type, that permit a more complete description of the videos of that type. We decided to implement our model using the functionality provided by MPEG-7.
Gradients in the Liver's Extracellular Matrix Chemistry from Periportal to Pericentral Zones: Influence on Human Hepatic Progenitors (2008)

Embryonic mesenchymal feeders produce paracrine signals requisite for ex vivo survival and expansion of hepatic progenitors. The signals consist of a subset of soluble factors found in conditioned medium, and a subset of insoluble factors found in extracellular matrix that include collagens and basal adhesion molecules. We have identified key matrix components required for ex vivo maintenance of human hepatic progenitors produced by biologically active feeders. These components are similar to those found in zone 1 of the liver acinus (e.g., space of Disse) between layers of parenchyma and endothelia. Within these layers are transition chemistry matrix gradients, from zone 1 to zone 3. Use of purified zone 1 matrix components enables attachment and expansion of human hepatic progenitors independent of feeders. Cells aggregated into spheroid-like structures on laminin or spread into monolayers on type III or IV collagens. Contrastingly, a zone 3 matrix component, type I collagen, elicited growth arrest and differentiation. Another zone 3 matrix component, fibronectin, inhibited attachment. Use of specific matrix components, along with soluble paracrine signals from feeders, should enable one to maintain hepatic progenitors ex vivo without feeders and under wholly defined conditions.
Comment on “Jamming at zero temperature and zero applied stress: The epitome of disorder” (2004)

Phys. Rev. E. 68, 011306 (2003)] claim that a special point J of a "jamming phase diagram" (in density, temperature, stress space) is related to random close packing of hard spheres and that it represents, for their suggested definitions of jammed and random, the recently introduced maximally random jammed state. We point out several difficulties with their definitions and question some of their claims. Furthermore, we discuss the connections between their algorithm and other hard-sphere packing algorithms in the literature.
A multi-level video codec for network distribution in the presence of errors (1994)

Describes an experiment in which the authors investigate the effects of bit errors during network distribution on coded video traffic. In this experiment, a video sequence is encoded using the progressive spectral selection mode of the JPEG international standard to produce a number of separate streams of coded video data. A simulation testbed is used to digitise and encode frames of video and to simulate the effect of transmission errors on the coded video data. The coded data is decoded to produce a number of re-animated video sequences. These sequences demonstrate the effects of bit errors on the separate streams of coded video data. The authors conclude that the separate streams have different tolerances to bit error effects and that the progressive spectral selection mode provides a flexible means of splitting encoded video data into separate streams in order to reduce the effects of bit errors on the received video data.
L-acetylcarnitine in depressed elderly subjects. A cross-over study vs placebo. (1987)

An open, cross-over study was performed on a population of 24 geriatric patients hospitalized because of depressive syndrome. They were subdivided, according to Hamilton's Scale as modified for the aged, into low- and high-score subgroups. The study period covered 2 months. Half the patients received acetylcarnitine for 1 month and placebo thereafter (Group A); the other half received placebo and acetyl-carnitine thereafter (Group B). Statistical evaluation was twofold: parametrical analysis of variance was carried out on 4 subgroups (A1, A2, B1 and B2) and analysis of the score percentage modifications before and after treatment was performed on Groups A and B. The experimental results showed that acetylcarnitine treatment was highly effective and statistically significant in subgroups A1/B1, A2/B2, A1, B1 and B2. In particular, it should be noted that depressive tendencies were significantly modified in most groups, whereas general somatic symptoms as well as anxiety, asthenia and sleep disturbances proved to be little affected. Clinical evaluation, carried out by calculation of modifications in pre- and post-treatment score percentages, provided clear evidence that acetylcarnitine was particularly effective in patients showing more serious clinical symptoms. The drug caused no side-effects at the doses and regimens used.
ADC residual dynamic range constraints in multistandard mobile terminals employing wideband-IF sampling (2003)

Wideband sampling and multirate digital signal processing are considered to be important steps towards the realization of software-defined multistandard mobile terminals. This paper proposes a unified approach to the estimation of ADC dynamic range requirements in the receive path of multistandard mobile terminals based on a wideband-IF sampling topology. In contrast to worst case predictions, usually derived from the superposition of several single-standard interferer/blocker characteristics assuming switchable IF filters, this work is based on a receiver architecture employing a common IF filter for all standards. The paper gives an overview on the derivation of key figures required for dynamic range estimation of UTRA-FDD, GSM and DECT. It is shown how the concept of residual dynamic range estimation allows the design and evaluation of suitable IF filter and ADC transfer characteristics considering dynamic constraints imposed by subsequent signal processing stages. Although the results derived in this work focus on a triple-standard mobile receiver the approach presented is readily extendable to include additional standard specifications.
Mining frequent patterns across multiple data streams (2011)

Mining frequent patterns from data streams has drawn increasing attention in recent years. However, previous mining algorithms were all focused on a single data stream. In many emerging applications, it is of critical importance to combine multiple data streams for analysis. For example, in real-time news topic analysis, it is necessary to combine multiple news report streams from dierent media sources to discover collaborative frequent patterns which are reported frequently in all media, and comparative frequent patterns which are reported more frequently in a media than others. To address this problem, we propose a novel frequent pattern mining algorithm Hybrid-Streaming, H-Stream for short. H-Stream builds a new Hybrid-Frequent tree to maintain historical frequent and potential frequent itemsets from all data streams, and incrementally updates these itemsets for efficient collaborative and comparative pattern mining. Theoretical and empirical studies demonstrate the utility of the proposed method.
Lens Designs for a 2032-mm f/8 Doublet Achromat (1966)

A lens to be used in photographing the sun's corona in monochromatic light was developed from an existing Fraunhofer design. Measured performance of the constructed lens exceeded predictions. The original lens design was evaluated and modifications prescribed by machine analysis with the LASL program, which makes a statistical analysis of the traced skew rays that generate the geometrical image spots.
Rendering parametric surfaces in pen and ink (1996)

This paper presents new algorithms and techniques for rendering parametric free-form surfaces in pen and ink. In particular, we introduce the idea of "controlled-density hatching" for conveying tone, texture, and shape. The fine control over tone this method provides allows the use of traditional texture mapping techniques for specifying the tone of pen-and-ink illustrations. We also show how a planar map, a data structure central to our rendering algorithm, can be constructed from parametric surfaces, and used for clipping strokes and generating outlines. Finally, we show how curved shadows can be cast onto curved objects for this style of illustration.
<i>Escherichia coli</i>interaction with human brain microvascular endothelial cells induces signal transducer and activator of transcription 3 association with the C-terminal domain of Ec-gp96, the outer membrane protein A receptor for invasion (2008)

Our inability to develop new therapeutic strategies to prevent meningitis due to Escherichia coli K1 is attributed to our incomplete understanding of the pathophysiology of the disease. Previously, we demonstrated that outer membrane protein A of E. coli interacts with a gp96 homologue, Ec-gp96, on human brain microvascular endothelial cells (HBMEC) for invasion. However, signalling events mediated by Ec-gp96 that allow internalization of E. coli are incompletely understood. Here, we demonstrate that signal transducer and activator of transcription 3 (Stat3) activation and its interaction with Ec-gp96 were critical for E. coli invasion. The activated Stat3 was colocalized with Ec-gp96 at the actin condensation sites, and overexpressing a dominant negative (DN) form of Stat3 in HBMEC significantly abrogated the invasion. Furthermore, overexpression of Ec-gp96Delta200, the C-terminal 214-amino-acid truncated Ec-gp96, prevented the invasion of E. coli in HBMEC. In contrast, lack of ATP binding by gp96 did not affect the invasion. Overexpression of DN forms of either phosphatidyl inositol-3 kinase (PI3-kinase) subunit p85 or protein kinase C-alpha (PKC-alpha) had no effect on the activation of Stat3 and its association with Ec-gp96, whereas overexpression of DN-Stat3 abolished the activation of both PI3-kinase and PKC-alpha. Together, our findings identified a novel interaction of Stat3 with Ec-gp96, upstream of PI3-kinase and PKC-alpha activation that is required for the invasion of E. coli into HBMEC.