gebhart/patrepeval huggingface dataset:
A closed‐form expression for the total degradation in OFDM systems (2014)

Summary In this paper, building upon Bussgang's theorem, we present a new expression for the total degradation (TD) in OFDM systems. This novel expression is applicable to any high power amplifier (HPA) model. In case of ideal clipping HPA model and for particular realizations of Rapp and Saleh HPA models, it and can be expressed in closed form. It enables a significant speed‐up in computing TD, because it avoids end‐to‐end system simulations. As a consequence, it simplifies the evaluation of TD as a function of the back‐off, yielding a more accurate evaluation of the optimum HPA back‐off (i.e., the back‐off value that minimizes TD). Numerical results show a perfect agreement between the proposed analytical framework and the Monte Carlo simulation results.Copyright © 2014 John Wiley & Sons, Ltd.
The liposomal encapsulation of ropivacaine and its in vitro release (1999)

SCOPUS: cp.j
Trace formation during locomotion of L929 mouse fibroblasts continuously recorded by interference reflection microscopy (IRM) (2000)

The recently reported formation of highly ordered traces by migrating cells has been studied on L929 fibroblasts in time lapse experiments by means of interference reflection microscopy (IRM) as well as by conventional microscopy. Formation of pronounced traces on glass substrates correlates to migration after cell division, and the trace arrangement on the substrate depends on migration velocity: slow migration results in a highly branched, broad, and relatively short trace, while fast migration yields a slim and long trace with few branches. IRM-irradiation caused cessation of locomotion and trace formation and accelerated degradation of existing traces. Traces consist of cord-like cytoplasmic strands, which contain F-actin filaments and they seem to be enveloped by a membrane. It is supposed that cell traces are homologous to filopodia. Traces arise mainly from non-retracted filopodia at the rear margin of the migrating cell. The branches within the traces are the result of the repeated stretching out of a backwardly directed lamellipodium. They arise from the formation of new filopodia that emerge at the actin ribs of the lamellipodium.
Spectral beam combining of fiber lasers with increased channel density (2007)

Incoherent spectral beam combining (SBC) by means of volume Bragg gratings (VBGs) has been shown to be a simple and robust technique for generating high-power laser radiation. Combination of laser radiation from multiple sources into a single near-diffraction-limited beam results in energy brightness increase, while spectral brightness is preserved. High-efficiency VBG recording in photo-thermo-refractive (PTR) glass has been recently developed. While being photosensitive in the UV, PTR glass offers high transmittance in the near-IR and visible parts of spectrum. Moreover, this glass has excellent mechanical properties and refractive index independent of temperature. These features enable VBGs in PTR glass to withstand high-power laser radiation, making them ideal elements for high-power SBC. We present experimental results of successful 5-channel SBC with reflecting VBGs in PTR glass with small channel spacing (~0.43 nm around 1064 nm). Absolute system efficiency of 93.5% is demonstrated. Combined beam is shown to be near-diffraction-limited with M<sup>2</sup>=1.11. Behavior of narrow-band reflecting VBGs in high-power beams is studied. VBGs are shown to withstand 570 W CW radiation around 1064 nm with diffraction efficiency in excess of 92%. Pathway to near-diffraction-limited high-power laser systems via SBC with VBGs is shown. High-efficiency SBC system with 0.2 nm channel spacing is designed.
Combined infrared and ultraviolet-visible spectroscopy matrix-isolated carbon vapor (1990)

Infrared and UV-visible absorption spectra have been measured on the same sample of matrix-isolated carbon vapor in order to establish correlations between absorption intensities of vibrational and electronic transitions as a function of sample annealing. A high degree of correlation has been found between the IR feature at 1998 cm−1 recently assigned to C8 and a UV absorption feature at about 3100 Å. Thus, for the first time, direct evidence is given for the assignment of one of the unknown UV-visible features of the long-studied matrix-isolated carbon vapor spectrum.
Loss of microbial diversity and pathogen domination of the gut microbiota in critically ill patients (2019)

Among long-stay critically ill patients in the adult intensive care unit (ICU), there are often marked changes in the complexity of the gut microbiota. However, it remains unclear whether such patients might benefit from enhanced surveillance or from interventions targeting the gut microbiota or the pathogens therein. We therefore undertook a prospective observational study of 24 ICU patients, in which serial faecal samples were subjected to shotgun metagenomic sequencing, phylogenetic profiling and microbial genome analyses. Two-thirds of the patients experienced a marked drop in gut microbial diversity (to an inverse Simpson's index of <4) at some stage during their stay in the ICU, often accompanied by the absence or loss of potentially beneficial bacteria. Intravenous administration of the broad-spectrum antimicrobial agent meropenem was significantly associated with loss of gut microbial diversity, but the administration of other antibiotics, including piperacillin/tazobactam, failed to trigger statistically detectable changes in microbial diversity. In three-quarters of ICU patients, we documented episodes of gut domination by pathogenic strains, with evidence of cryptic nosocomial transmission of <i>Enterococcus faecium</i>. In some patients, we also saw an increase in the relative abundance of apparent commensal organisms in the gut microbiome, including the archaeal species <i>Methanobrevibacter smithii</i>. In conclusion, we have documented a dramatic absence of microbial diversity and pathogen domination of the gut microbiota in a high proportion of critically ill patients using shotgun metagenomics.
ChemInform Abstract: Poly(ethylene Glycol)‐containing Supports for Solid‐Phase Synthesis of Peptides and Combinatorial Organic Libraries (1998)

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.
ChemInform Abstract: Reactions of o‐Bonded Alkyl‐ and Aryliron Porphyrins with Nitric Oxide. (1986)

Abstract Die o‐gebundenen Alkyl‐ oder Aryl ‐ Fe‐Porphyrinkomplexe (I) reagieren mit NO schnell unter Bildung der Derivate (II), in denen das Metall, stabilisiert durch die NO‐Gruppe, als Fe(II) vorliegt.
Drying Foods at Home (1980)

This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.
Modeling dynamic cerebral blood volume changes during brain activation on the basis of the blood‐nulled functional MRI signal (2007)

Recently, vascular space occupancy (VASO) based functional magnetic resonance imaging (fMRI) was proposed to detect dynamic cerebral blood volume (CBV) changes using the blood-nulled non-selective inversion recovery (NSIR) sequence. However, directly mapping the dynamic CBV change by the NSIR signal change is based on the assumption of slow water exchange (SWE) around the capillary regime without cerebral blood flow (CBF) effects. In the present study, a fast water exchange (FWE) model incorporating with flow effects was derived from the Bloch equations and implemented for the quantification of dynamic CBV changes using VASO-fMRI during brain activation. Simulated results showed that only subtle differences in CBV changes estimated by these two models were observed on the basis of previously published VASO results. The influence of related physiological and biophysical factors within typical ranges was evaluated in steady-state simulations. It was revealed that in the transient state the CBV curves could be delayed in comparison with measured NSIR curves owing to the imbalance between the inflowing and outflowing blood signals.
Molecular Mediators of α<sub>v</sub>β<sub>3</sub>-Induced Endothelial Cell Survival (2006)

The alphavbeta3 integrin interaction with the extracellular matrix (ECM) plays an essential role in inhibiting apoptosis in endothelial cells. We have recently shown that alphavbeta3 ligation on rat aortic endothelial cells (RAECs) specifically activates the transcription factor nuclear factor kappaB (NF-kappaB) and promotes cell survival. Inhibiting NF-kappaB nuclear translocation abolished the protective effect of alphavbeta3 ligands. Here, we report that ligation of alphavbeta3 by its ligand, osteopontin (OPN), induces the phosphorylation and activation of inhibitory kappa B kinase beta IKKbeta and promotes the specific degradation of inhibitory kappa Balpha (IkappaBalpha) in RAECs. Overexpression of a dominant negative (DN) IKKbeta protein prevents IkappaBalpha phosphorylation, NF-kappaB activation, and inhibits the protective effects of OPN. The NF-kappaB-inducing kinase (NIK) has been shown to be one of the upstream kinases involved in IKK activation. OPN-mediated NF-kappaB activity is increased upon NIK wild-type (WT) overexpression and blocked following NIK DN overexpression. In addition, NIK-/-mouse embryonic fibroblasts (MEFs) plated on OPN display reduced NF-kappaB activity and decreased IkappaBalpha phosphorylation compared to NIK+/+MEFs. Finally, functional inhibition of integrin beta3-dependent NF-kappaB signaling decreases OPN-induced IkappaBalpha, IKKbeta and NIK phosphorylation. These studies for the first time show that the alphavbeta3-NF-kappaB-dependent endothelial survival pathway is dependent on IkappaBalpha, IKKbeta, and NIK.
[Regulation of antibody production by monokines and glucocorticoids]. (1990)

The antibody production by B lymphocytes is regulated by a number of interleukins produced by T lymphocytes and/or monocytic cells: IL-1, IL-2, IL-4, IL-5, IL-6 and interferons. This response is also under the influence of other mediators such a glucocorticosteroid hormones. The in vivo administration of pharmacological doses of steroids do not markedly suppress the in vivo antibody response to exogeneous antigens. This is due to a contrasting effect: they prefoundly inhibit the production of most interleukins whereas they directly stimulate B lymphocyte response. We recently analyzed the mechanisms of this latter phenomenon and showed that glucocorticosteroids synergize with the monocyte-derived cytokines IL-1 and IL-6 to potentiate the in vitro B lymphocyte differentiation.
A Realization of Haptic Skill Database by Bilateral Motion Control (2006)

This paper proposes the novel technology for the haptic skill database. In recent years, skill preservation and skill acquisition have been serious problems in various fields. However, the conventional recording technology of visual and audio information is not suitable for the preservation and acquisition of the skill. This is because the expert skill requires haptic information that is obtained from the real environment. So, in order to realize the preservation and acquisition of the skill, the novel database which is able to store and replay bilateral haptic information as well must be developed. Thus, in this paper, the haptic skill database based on bilateral control that is able to preserve the skill and to replay it is proposed. The experimental results show the viability of the proposed methods
STUDIES IN THE TYROSINE METABOLISM OF PHENYLKETONURICS (1970)

In phenylketonuria there is a deficiency of phenylalanine hydroxylase, the degree of deficiency determining the clinical severity of the disease. A total lack of the enzyme is found in the classical disease (Jervis, 1953; Mitoma et al., 1957; Wallace et al., 1957; Kaufman, 1958) while a partial lack has been demonstrated in cases of hyperphenylalaninaemia (Justice et al., 1967; Kang et al., 1970). The enzyme is necessary for the hepatic conversion of ingested l-phenylalanine to l-tyrosine.
Influence of wall vibrations on the sound of brass wind instruments (2010)

The results of an experimental and theoretical investigation of the influence of wall vibrations on the sound of brass wind instruments are presented. Measurements of the transmission function and input impedance of a trumpet, with the bell both heavily damped and freely vibrating, are shown to be consistent with a theory that assumes that the internal pressure causes an oscillation of the diameter of the pipe enclosing the air column. These effects are shown to be most significant in sections where there are flaring walls, which explains why damping these vibrations in cylindrical pipes normally produces no measurable effects.
Hyperlipidemia after allogeneic stem cell transplantation: prevalence, risk factors, and impact on prognosis (2012)

Hyperlipidemia is one of the late complications after allogeneic stem cell transplantation (SCT). Although intrahepatic cholestasis caused by chronic graft-versus-host disease (GVHD) or calcineurin inhibitors has been considered as possible etiologies, its prevalence, risk factors, and impact on prognosis have not been investigated well. We performed a retrospective analysis of 194 patients who underwent allogeneic SCT between 1995 and 2008 in our institute and survived more than 100 d after SCT. Overall, 83 (42.8%) and 99 (50.8%) patients developed hypercholesterolemia (≥240 mg/dL) and hypertriglyceridemia (≥200 mg/dL), respectively. In multivariate analysis, the development of chronic GVHD (hazard ratio [HR] 2.04, p < 0.05) and steroid use (HR 2.24, p < 0.01) were independently associated with hypercholesterolemia, while administration of calcineurin inhibitors was not. As for the prognostic impact, multivariate analysis showed that the patients with hypercholesterolemia had a tendency of lower rate of relapse (HR: 0.44, p = 0.07). There was no difference in non-relapse mortality or overall survival between the groups. In conclusion, the development of hypercholesterolemia is regarded as one of the symptoms accompanied with chronic GVHD and might indicate a better control of the primary disease.
Transition Metal Chelate‐Fulleride Compounds: Electrocrystallization of Semiconducting  [ Ru ( bpy ) 3 ]  (  C 60 ) 2 (1993)

We report the electrochemical synthesis and conductivity of the transition metal chelate‐fulleride compound (where bpy = 2,2'‐bipyridine). This compound was prepared via the electrogeneration of in dichloromethane media saturated with . Two point conductivity measurements demonstrate that this black crystalline material exhibits Arrhenius behavior typical of semiconductors at temperatures between 80 and 308 K. The specific conductivity at 298.15 K is 0.01 Ω−1 cm−1, and the activation energy is 0.15 eV.
Structural Concrete-Biaxial Bending and Compression (1973)

This note presents a modification of the extended Newton-Raphson method for the study of the moment-curvature characteristics of structural concrete sections subjected to biaxial bending moments and axial load.
Solving Stereo Matching Problems Using Interior Point Methods (2008)

This paper describes an approach to reformulating the stereo matching problem as a large scale Linear Program. The approach proceeds by approximating the match cost function associated with each pixel with a piecewise linear convex function. Regularization terms related to the first and second derivative of the disparity field are also captured with piecewise linear penalty terms. The resulting large scale linear program can be tackled using interior point methods and the associated Newton Steps involve matrices that reflect the structure of the underlying pixel grid. The proposed scheme effectively exploits the structure of these matrices to solve these linear systems efficiently. 1. Introduction and Related
A Numerical and Experimental Study on the Flow and Heat Transfer Characteristics in Co-Rotating Disk Systems. (1983)

The flow between parallel disks has its unique features because of the radius effect. When the disks are set into motion, the angular momentum transport from the rotating disks to the fluid makes the flow complicated through centrifugal force and eventually yields enhancement of heat transfer. In this study, the characteristics of the flow and of the heat transfer in stationary and in rotating disk systems were analyzed numerically and experimentally. In the numerical analysis, the SIMPLER method was applied to the laminar and to the turbulent flow with a k-(epsilon) model. Some improvement was made to the conventional algorithm for faster convergency. The analysis revealed detailed profiles of velocity and pressure distribution and the mechanism of the heat transfer enhancement of the rotating flow. Also the effects of rotation number, Reynolds number, Pr and tl number and geometry on the flow field and on heat transfer were investigated. A conventional method for experimental determination of heat transfer performance, namely the single blow technique, was modified for better accuracy and the merits of the new method were discussed. Average Nusselt numbers were measured experimentally in the Reynolds number range of 500 to 4000 with disk rotation speeds from zero to 3600 RPM. Theory compared qualitatively well with experimental results in heat transfer performance. The discrepancy between them was attributed to the nonidentical geometrical and operating conditions.
Growth of Ultralong ZnS/SiO<sub>2</sub> Core−Shell Nanowires by Volume and Surface Diffusion VLS Process (2008)

Nanowires of up to 1 cm in length and approximately 30 nm in diameter were synthesized through a simple chemical vapor deposition process. Scanning electron microscopy (SEM) data showed that these nanowires were well-aligned and grew in the direction along the flow of the carrier gas. Through transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis, the nanowires were found to be composed of a single-crystalline ZnS core and amorphous SiO2 shell. Gold catalyst particles were found at the tips of the nanowires and completely encased by a silica shell. Photoluminescence (PL) measurements were performed on nanowire samples in which the synthesis time was systematically varied to provide information regarding growth dynamics. After a systematic study on the structure, we propose that the core−shell nanowires were formed via a distinct volume and surface diffusion process occurring simultaneously for different chemical species in and on the gold catalyst particle.
Thermodynamics of Metal Chelate Formation. V. Nitrilotriacetic Acid<sup>1</sup> (1956)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of Metal Chelate Formation. V. Nitrilotriacetic Acid1Vincent L. Hughes and Arthur E. MartellCite this: J. Am. Chem. Soc. 1956, 78, 7, 1319–1324Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs.acs.org/doi/10.1021/ja01588a015https://doi.org/10.1021/ja01588a015research-articleACS PublicationsRequest reuse permissionsArticle Views158Altmetric-Citations19LEARN 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
Pixel-Wise Unified Rate-Quantization Model for Multi-Level Rate Control (2013)

In this paper, we present a pixel-wise unified rate quantization (R-Q) model for a low-complexity rate control on configurable coding units of high efficiency video coding (HEVC). In the case of HEVC, which employs hierarchical coding block structure, multiple R-Q models can be employed for the various block sizes. However, we found that the ratios of distortions over bits for all the blocks are a nearly constant because of employment of the rate distortion optimization technique. Hence, one relationship model between rate and quantization can be derived from the characteristic of similar ratios of distortions over bits regardless of block sizes. Thus, we propose the pixel-wise unified R-Q model for HEVC rate control working on the multi-level for all block sizes. We employ a simple leaky bucket model for bit control. The rate control based on the proposed pixel-wise unified R-Q model is implemented on HEVC test model 6.1 (HM6.1). According to the evaluation for the proposed rate control, the average matching percentage to target bitrates is 99.47% and the average PSNR degradation is 0.76 dB. Based on the comparative study, we found that the proposed rate control shows low bit fluctuation and good RD performance, compared to R-lambda rate control for long sequences.
Optimal linear dispersion codes for correlated MIMO channels (2008)

The design of space-time codes for frequency flat, spatially correlated MIMO fading channels is considered. The focus of the paper is on the class of space-time block codes known as linear dispersion (LD) codes, introduced by Hassibi and Hochwald. The LD codes are optimized with respect to the mutual information between the inputs to the space-time encoder and the output of the channel. The use of the mutual information as both a design criterion and a performance measure is justified by allowing soft decisions at the output of the space-time decoder. A spatial Fourier (virtual) representation of the channel is exploited to allow for the analysis of MIMO channels with quite general fading statistics. Conditions, known as generalized orthogonal conditions (GOC's), are derived for an LD code to achieve an upper bound on the mutual information, with the understanding that LD codes that achieve the upper bound, if they exist, are optimal. Explicit code constructions and properties of the optimal power allocation schemes are also derived. In particular, it is shown that optimal LD codes correspond to beamforming to a single virtual transmit angle at low SNR, and a necessary and sufficient condition for beamforming to be optimal is provided. Due to the nature of the code construction, it is further observed that the optimal LD codes can be designed to adapt to the statistics of different scattering environments. Finally, numerical results are provided to illustrate the optimal code design for three examples of sparse scattering environments. The performance of the optimal LD codes for these scattering environments is compared with that of LD codes designed assuming the i.i.d. Rayleigh fading (rich scattering) model, and it is shown that the optimal LD codes perform significantly better. The optimal LD codes are also compared to beamforming LD codes and it is shown that beamforming is nearly optimal over a range of SNR's of interest.
Dispersed Fourier Transform Spectrographs: The Next Generation (2009)

We compare a first and second generation dispersed FTS, which is a combination of an FTS and grating spectrometer. We include a quantitative analysis of resulting increase in sensitivity, and preliminary results.