gebhart/patrepeval huggingface dataset:
Battery Energy Storage System Models for Microgrid Stability Analysis and Dynamic Simulation (2017)

With the increasing importance of battery energy storage systems (BESS) in microgrids, accurate modeling plays a key role in understanding their behavior. This paper investigates and compares the performance of BESS models with different depths of detail. Specifically, several models are examined: an average model represented by voltage sources; an ideal dc source behind a voltage source converter; a back-to-back buck/boost and bidirectional three-phase converter, with all models sharing the same control system and parameters; and two additional proposed models where the switches are replaced by dependent sources to help analyze the differences observed in the performance of the models. All these models are developed in PSCAD and their performances are simulated and compared considering various issues such as voltage and frequency stability and total harmonic distortion in a benchmark test microgrid. It is shown through simulation results and eigenvalue studies that the proposed models can exhibit a different performance, especially when the system is heavily loaded, highlighting the need for more accurate modeling under certain microgrid conditions.
High-Speed Recording up to 15,000 rpm Using Thin Optical Disks (2008)

We propose a high-speed optical disk system using thin flexible optical disks (HS-FOD) recording up to 15,000 rpm. The thin optical disk system is composed of three technical elements: media employing a thin and flexible substrate 0.1 mm thick, a mechanical stabilizer, and a high-speed tracking servo employing a feed-forward control with zero phase error tracking (ZPET-FF control). The HS-FOD system has an optical head with numerical aperture (NA) of 0.85 and is compatible with the optical system of a Blu-ray disc or a broadcast-use optical disk. We have successfully performed disk rotation stably and have performed precisely a focus servo and a tracking servo at 15,000 rpm. We also achieved writing and reading data at 15,000 rpm and recording 252 Mbps of random pattern data and could get small values of jitter below the tolerance. These results are enough to record professional high-definition television (HDTV) video signals in formats such as HD-D5 for broadcast-use.
Photocleavable Regenerative Network Materials with Exceptional and Repeatable Viscoelastic Manipulability (Adv. Sci. 19/2021) (2021)

Photocleavable Regenerative Network Materials In article number 2101143, Minami Oka, Satoshi Honda, and co‐workers develop a photocleavable regenerative network material derived from star‐shaped polydimethylsiloxanes. This material exhibits repeatable and dramatic change in their mechanical properties upon photoirradiation, enabling the fabrication of remotely‐controlled photo‐melt adhesive and photo‐scissible rubber string with their spatially and temporally local manipulability, solventless handleability, and excellent reversibility. [Image: see text]
Site-protected fixation and immobilization ofEscherichia coli cells displaying surface-anchored ?-lactamase (1999)

Bacteria displaying heterologous receptors or enzymes on their surface hold great potential as whole-cell adsorbents and biocatalysts, respectively. For industrial applications, such surface-engineered cells need to be killed and chemically fixed to prevent disintegration and leakage of the displayed proteins under process conditions. It is also highly desirable to couple the chemically stabilized cells onto a solid support matrix for additional mechanical stability, flexibility in reactor choice, and easy separation from processed medium. Recently, we described the development of a readily scalable methodology for cell killing, fixation, and outer membrane stabilization via glutaraldehyde fixation followed by secondary crosslinking (Freeman, A., Abramov, S. and Georgiou, G. 1996. Biotechnol. Bioeng. 52: 625-630). Glutaraldehyde treatment was also found, however, to reduce the specific activity of a model enzyme, beta-lactamase displayed on the surface of E. coli. Here, we show that crosslinking carried out in the presence of beta-lactamase inhibitors, namely phenyl boronic acid or sodium borate, protects the active site from chemical modification resulting in up to threefold higher specific activities without affecting the cell-stabilizing effect of the glutaraldehyde treatment. To prepare an immobilized whole cell biocatalyst, residual unreacted surface aldehyde groups were employed to immobilize covalently the fixed bacteria onto chitosan-coated cellulose powder. The binding of the bacteria onto chitosan-coated cellulose was quantitative up to cell loading of 83 mg dry cell weight/g of support. Cell immobilization did not introduce mass transfer limitations and created only a modest reduction in Vmax. Thus, chemical crosslinking, affected in presence of reversible active-site inhibitors and coupled with cell immobilization on chitosan-coated cellulose represents a widely useful methodology for the process application of recombinant bacteria displaying surface-anchored heterologous proteins.
Paraganglioma of the paranasal sinuses and the parapharyngeal space related to "Carney triad" – case report (2021)

Introduction Head and neck paragangliomas are rare (0.5 % of head and neck tumors), but they are a very important differential diagnosis due to their hypervascularization and partly malignant growth.
An opportunistic energy-efficient medium access scheme for wireless sensor networks (2005)

This paper introduces an opportunistic medium-access control (MAC) scheme for controlling the uplink message transfer from sensor nodes to a central controller in wireless sensor networks (WSN). By equipping the controller with multiple antennas to communicate with single-antenna sensors, we propose a scheme that benefits from diversity reception at the controller and leads to a considerable reduction of battery energy consumption in sensor nodes. The performance of the scheme is illustrated using a Rayleigh fading channel model.
Investigating addition effect of hafnium in InZnO thin film transistors using a solution process (2010)

The effects of adding Hf into a InZnO (IZO) system, particularly the electrical characteristics of their thin film and thin film transistors (TFTs), were investigated as a function of atomic concentration from 0 to 10 at. % of Hf and Ga/Zn. Because Hf has a high affinity for oxygen in IZO system, the Hf suppresses carrier generation more effectively than does Ga. At 10 at. % of Hf/Zn atomic concentration, the HfInZnO TFTs showed wider on-to-off ratios than those of GaInZnO TFTs due to the low standard-electrode-potential of Hf and sharp subthreshold swings due to low trap density.
Stability study of thymoquinone, carvacrol and thymol using HPLC-UV and LC-ESI-MS (2020)

The aim of this study was to investigate the stability of three major antioxidants of Nigella sativa: thymoquinone (TQ), carvacrol (CR) and thymol (THY), under different stress conditions using HPLC and LC-MS/MS. Forced degradation for each compound was performed under different conditions, including oxidation, hydrolysis, photolysis and thermal decomposition. The results showed that both CR and THY were stable under the studied conditions, whereas TQ was not affected by acidic, basic and oxidative forced conditions but the effect of light and heat was significant. The degradation products of TQ were further investigated and characterized by LC-MS/MS. HPLC-UV method has been fully validated in terms of linearity and range, the limit of detection and quantitation, precision, selectivity, accuracy and robustness. The method was successfully applied to quantitative analysis of the principal antioxidants of Nigella sativa TQ, CR and THY in different phytopharmaceuticals.
Decision-directed interference cancellation applied to satellite broadcast reception (2006)

This paper investigates the usage of established interference cancellation techniques applied to the simultaneous reception of geostationary satellite broadcast signals from two or more satellites. In particular the reduction of interference from adjacent satellites is of interest, which would allow a reduction of the antenna size and the requirements on the directivity of the installation. The rejection of unwanted adjacent satellite interferers can imply a large equivalent parabolic reflector size to achieve the required spatial separation of the signals. The usage of small and cheap reception antennas at the end-user premises can be facilitated by the reduction of the requirements on the antenna characteristics in terms of adjacent satellite interference rejection, in particular for the joint reception of signals from two or more simultaneous geostationary orbital locations. In this study the novel approach of using simple decision directed interference reduction techniques at the symbol detection level is considered to relax the requirements on the reception system front-end.
The Prognostic Utility of Intraoperative Allograft Vascular Inflow Measurements in Donation After Circulatory Death Liver Transplantation (2021)

Donation after circulatory death (DCD) liver transplantation improves deceased donor liver use and decreases waitlist burden, albeit at an increased risk of biliary complications and inferior graft survival. Employing liver vascular inflow measurements intraoperatively permits allograft prognostication. However, its use in DCD liver transplantation is hitherto largely unknown and further explored here. DCD liver transplantation patient records at a single center from 2005 to 2018 were retrospectively scrutinized. Intraoperative flow data and relevant donor parameters were analyzed against endpoints of biliary events and graft survival. A total of 138 cases were chosen. The incidence of cumulative biliary complications was 38%, the majority of which were anastomotic strictures and managed successfully by endoscopic means. The ischemic cholangiopathy rate was 6%. At median thresholds of a portal vein (PV) flow rate of <92 mL/minute/100 g and buffer capacity (BC) of >0.04, both variables were independently associated with risk of biliary events (P = 0.01 and 0.04, respectively). Graft survival was 90% at 12 months and 75% at 5 years. Cox regression analysis revealed a PV flow rate of <50 mL/minute/100 g as predictive of poorer graft survival (P = 0.01). Furthermore, 126 of these DCD livers were analyzed against a propensity-matched group of 378 contemporaneous donation after brain death liver allografts (1:3), revealing significantly higher rates (P < 0.001) of both early allograft dysfunction (70% versus 30%) and biliary complications (37% versus 20%) in the former group. Although flow data were comparable between both sets, PV flow and BC were predictive of biliary events only in the DCD cohort. Intraoperative inflow measurements therefore provide valuable prognostication on biliary/graft outcomes in DCD liver transplantation, can help inform graft surveillance, and its routine use is recommended.
A Study on Branding of Eggs in Select Areas of Tamilnadu (2016)

This study was initiated with the motive to check branding of eggs in select areas of Tamilnadu. A total of 100 customers, 20 retailers and 20 producers had been chosen and obtained their views on the branding of eggs. Data were collected by presenting well-structured questionnaire in the hands of respondents. Chi-square test, factor analysis, regression equation coefficient, and mean scores analysis were used to analyze the data. Results revealed that there is significant relationship exists between demographic profile of customers and their awareness on branded eggs. Factor analysis confirmed that brand, egg variants, egg content, food preparation and egg price relatively influenced on egg buying behaviour of customers. Retailers opined that there is no significant difference between the sale of branded and non-branded eggs. There is ample scope for egg producer to sale their egg under a brand name. It is concluded that customers are not completely aware about the sale of branded egg, but for consumption purpose often consider many variables. Retailers are preferred to sell non-branded eggs to low price segment and branded eggs to high quality segment. Concentrating on brand building will yield extra-ordinary returns to the producers.
The pessimism behind optimistic simulation (1994)

In this paper we make an analogy between the time that storage must be maintained in an optimistic simulation and the blocking time in a conservative simulation. By exploring this analogy, we design two new Global Virtual Time (GVT) protocols for Time Warp systems. The first protocol is based on null message clock advancement in conservative approaches. Our main contribution is a new protocol inspired by Misra's circulating marker scheme for deadlock recovery. It is simple enough to be implemented in hardware, takes no overhead in the normal path, can be made to work over non-FIFO links, and its overhead can be dynamically tuned based on computational load.
Whole-genome sequencing data of Kazakh individuals (2021)

Blood samples have been collected from five ethnic healthy Kazakh individuals living in Kazakhstan. The genomic DNA was extracted from blood and sequenced. Sequencing was performed on Illumina HiSeq2000 next-generation sequencing platform. We sequenced and analyzed the whole-genomes of ethnic Kazakh individuals with the coverage ranging from 26 to 32X. Ranging from 98.85 to 99.58% base pairs were totally mapped and aligned on the human reference genome GRCh37 hg19. Het/Hom and Ts/Tv ratios for each whole genome ranged from 1.35 to 1.49 and from 2.07 to 2.08, respectively. Sequencing data are available in the National Center for Biotechnology Information SRA database under the accession number PRJNA374772.
Intermolecular insertion reactions of phosphoryl nitrenes (1974)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntermolecular insertion reactions of phosphoryl nitrenesR. Breslow, A. Feiring, and F. HermanCite this: J. Am. Chem. Soc. 1974, 96, 18, 5937–5939Publication Date (Print):September 1, 1974Publication History Published online1 May 2002Published inissue 1 September 1974https://pubs.acs.org/doi/10.1021/ja00825a042https://doi.org/10.1021/ja00825a042research-articleACS PublicationsRequest reuse permissionsArticle Views458Altmetric-Citations56LEARN 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
Sulfide Precipitation in Titanium-Added Steel with Residual Level of Copper (1) &mdash;Precipitation in Austenite Region&mdash; (2009)

The authors previously reported that even a trace level of copper (0.01% Cu) acts as a sulfide-former to form copper sulfide (Cu-S) in non-Ti-added steel in which Mn has been thought to be the only sulfide-former so far. A new concept of copper-related sulfide precipitation is now extended to Ti-added steel. In addition, the total sulfide precipitation in Ti-added steel is reconfigured with the new knowledge of Cu-S. The new concept is shown in three consecutive papers. This first paper focuses on the sulfide precipitation in austenite-heat-treated Ti-added steel.Through TEM observation and quantitative chemical analysis, it is reported that the sulfide precipitation in austenite-heat-treated Ti-added steel reflects not only the precipitation in the austenite region but also the inevitable precipitation behavior during the cooling process from austenite to ferrite region, especially trace-level-Cu-induced Cu-S precipitation in ferrite region during rapid cooling. The mechanism of the inevitable sulfide precipitation during the cooling process is mainly based upon TiS-decomposition-induced morphological change and the re-precipitation of sulfur which remains solute over precipitatable limit during the heat-treatment in austenite region, and is precisely discussed in relation with Cu-S precipitation.
The quiet embryo hypothesis: Molecular characteristics favoring viability (2007)

It has been proposed that the viability of early mammalian embryos is associated with a metabolism that is "quiet" rather than "active" (Leese HJ, 2002:BioEssays 24:845-849). The data on which this hypothesis was based were largely drawn from measurements on the depletion and appearance of amino acids from the culture medium. Data on the de novo synthesis of protein in in vivo- and in vitro-derived bovine embryos, as determined from the flux of radiolabeled methionine, have provided further support of the hypothesis and are interpreted to provide a new set of testable propositions that could illuminate the molecular basis of the quiet metabolism phenotype. The propositions are based on the premise that the extent of DNA damage, and the RNA and protein content of the immature oocyte, are key factors in determining whether the zygote progresses to the blastocyst stage. We propose that stochastic events and environmental stresses determine whether the condition of the genome, transcriptome, and proteome of the zygote will support development. Several molecular components are identified that may determine the viability of a zygote, and we speculate that the cellular response to unfavorable events or excessive DNA damage may be the premature activation of the embryonic genome and of apoptosis.
Microfabricated microdialysis microneedles for continuous medical monitoring (2002)

Enzyme based biosensors suffer from loss of activity and sensitivity through a variety of processes. One major reason for the loss is through large molecular weight proteins settling onto the sensor and affecting sensor signal stability and disrupting enzyme function. One way to minimize loss of sensor activity is to filter out large molecular weight compounds before sensing small biochemicals such as glucose. A novel microdialysis microneedle is introduced that is capable of excluding large MW compounds based on size. Preliminary experimental evidence of membrane permeability is shown, as well as diffusion and permeability modeling. Solutions should be able to equilibrate across the microdialysis membrane in a few seconds, as opposed to a few minutes with existing technologies. Microdialysis microneedles present an attractive first step towards decreasing size, patient discomfort and energy consumption of portable medical monitors over existing technologies.
Low-Temperature and High-Strain-Rate Superplasticity of Ultrafine-Grained A7075 Processed by High-Pressure Torsion (2018)

An A7075 alloy was processed by high-pressure torsion (HPT) under an applied pressure of 6 GPa for 1, 3 and 5 revolutions with a rotation speed of 1 rpm at room temperature. Vickers microhardness saturated to a level of 220 Hv after the HPT processing and the grain size was refined to ∼120 nm at the state of the hardness saturation. Tensile tests were conducted with initial strain rates from 2.0 × 10−2 to 2.0 × 10−4 s−1 at a temperature in the range of 200–400°C. It was shown that high-strain rate superplasticity (>1.0 × 10−2 s−1) and/or low-temperature superplasticity (0.5–0.6Tm) occurred in the HPT-processed A7075 alloy, where the superplasticity deformation is controlled by grain boundary sliding through grain boundary diffusion.
NOTES and Other Emerging Trends in Gastrointestinal Endoscopy and Surgery: The Change That We Need and the Change That Is Real (2009)

In this inaugural year of a historic presidency, gastroenterologists and gastrointestinal surgeons may well want to turn their attention to more immediate transformative events that have the potential to revolutionize their own practice in the near future. The most visible and, perhaps, controversial of these is natural orifice transluminal endoscopic surgery (NOTES), but other equally important changes are emerging as investigators around the globe vie with one another in the demonstration of increasingly audacious procedures. As is to be expected, we are also already seeing a backlash from more conservative scholars attempting to temper what they believe to be the surgical equivalent of irrational exuberance. However, by far the most common attitude among gastroenterologists toward these changes is one of indifference. In this piece, we discuss the circumstances that led to the development of NOTES and other innovative procedures, the peril that lies in ignoring them, and the true promise that they hold for our specialties.
Angiopoietin-2 Functions as a Tie2 Agonist in Tumor Models, Where It Limits the Effects of VEGF Inhibition (2012)

The angiopoietins Ang1 (ANGPT1) and Ang2 (ANGPT2) are secreted factors that bind to the endothelial cell-specific receptor tyrosine kinase Tie2 (TEK) and regulate angiogenesis. Ang1 activates Tie2 to promote blood vessel maturation and stabilization. In contrast, Ang2, which is highly expressed by tumor endothelial cells, is thought to inhibit Tie2 activity and destabilize blood vessels, thereby facilitating VEGF-dependent vessel growth. Here, we show that the inhibition of tumor xenograft growth caused by an Ang2-specific antibody (REGN910) is reversed by systemic administration of the Tie2 agonist Ang1. These results indicate that Ang2 blockade inhibits tumor growth by decreasing Tie2 activity, showing that Ang2 is a Tie2 activator. REGN910 treatment of tumors resulted in increased expression of genes that are repressed by Tie2 activation, providing further evidence that REGN910 inhibits Tie2 signaling. Combination treatment with REGN910 plus the VEGF blocker aflibercept reduced tumor vascularity and tumor perfusion more dramatically than either single agent, resulting in more extensive tumor cell death and more potent inhibition of tumor growth. Challenging the prevailing model of Ang2 as a destabilizing factor, our findings indicate that Ang2 plays a protective role in tumor endothelial cells by activating Tie2, thereby limiting the antivascular effects of VEGF inhibition. Thus, blockade of Ang2 might enhance the clinical benefits currently provided by anti-VEGF agents. .
A Note on the Broadcast Channel With Stale State Information at the Transmitter (2015)

This paper shows that the Maddah-Ali–Tse (MAT) scheme, which achieves the symmetric capacity of two example broadcast channels with strictly causal state information at the transmitter, is a simple special case of the Shayevitz–Wigger (SW) scheme for the broadcast channel with generalized feedback, which involves block Markov coding, Gray–Wyner compression, superposition coding, and Marton coding. Focusing on the class of symmetric broadcast channels with state, we derive an expression for the maximum achievable symmetric rate using the SW scheme. We show that the MAT results for the two-receiver case can be recovered by evaluating this expression for the special case in which superposition coding and Marton coding are not used. We then introduce a new broadcast channel example that shares many features of the MAT examples. We show that another special case of our maximum symmetric rate expression in which superposition coding is also used attains a higher symmetric rate than the MAT scheme. The symmetric capacity of this new example is not known, however.