gebhart/patrepeval huggingface dataset:
Effects of heat and proteolysis on deamidation of food proteins using peptidoglutaminase (1992)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of heat and proteolysis on deamidation of food proteins using peptidoglutaminaseJamel S. HamadaCite this: J. Agric. Food Chem. 1992, 40, 5, 719–723Publication Date (Print):May 1, 1992Publication History Published online1 May 2002Published inissue 1 May 1992https://pubs.acs.org/doi/10.1021/jf00017a003https://doi.org/10.1021/jf00017a003research-articleACS PublicationsRequest reuse permissionsArticle Views386Altmetric-Citations37LEARN 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
Sapphire substrate-bonded ultra-low threshold 850 nm VCSEL array (2003)

Oxide-confined vertical-cavity surface-emitting laser (VCSEL) 8/spl times/8 arrays were fabricated and off set flip-chip bonded onto sapphire substrates. These devices were further wire bonded in pin-grid-array (PGA) packages as optical transmitters. Optical output of the top-emitting 850 nm VCSEL array was transmitted through the transparent sapphire substrate. Lasing threshold as low as 24 /spl mu/A was found from some of these devices at room temperature.
Robust Current Controller based solar-inverter system used for voltage regulation at a substation (2014)

This paper is a continuation of the work conducted in Chhabra, M., Barnes, F., “Robust Current Controller Design using Mu-Synthesis for Grid-Connected Three Phase Inverter” [1]. High penetration of distributed photovoltaic generation on a distribution system can present several challenges and opportunities for utilities. Voltage sags and swells cannot always be compensated for by slowly responding utility equipment, resulting in degradation in power quality. Voltage variations are commonly caused by rapidly varying solar irradiance, and/or variations in the load. In this paper a robust current controller based solar-inverter system is used for voltage regulation at a substation. Conventional inverter current controllers based on proportional-integral (PI) control may not always offer the superior tracking performance, and harmonic rejection ability of robust controllers. We use the repetitive control strategy, in tandem with a mu-synthesis based controller, to attain optimal sinusoidal reference tracking and harmonic rejection. Musynthesis based control is chosen to attain optimal reference tracking in the presence of plant uncertainties. By applying the mu-synthesis principle, a feedback controller that simultaneously achieves robust stability and robust tracking performance is obtained. To test the proposed inverter current controller, the inverter is interconnected to a 500kW solar system model and operated in volt-var control mode. Ten such 500kW solar-inverter systems are paralleled and interconnected to a substation. The substation is modeled with multiple loads, tap changing transformers, and a 70MVar variable capacitor bank. Simulation performance is compared to an H∞ based optimal current controller, and a PI based current controller.
Process For The Production Of Arachidonic And/or Eicosapentaenoic Acid (Patent GB 2431158 A) (2007)

A process for the production of arachidonic acid and/or eicosapentaenoic acid in plants through the co-expression of a W -12-/ W -15-desaturase, W -9-elongase, W -8-desaturase and a W -5-desaturase and a process for the production of lipids or oils having an increased content of unsaturated fatty acids, in particular l -3 and l -6 fatty acids having at least two double bonds and a 18 or 20 carbon atom chain length. Preferably the arachidonic acid and eicosapentaenoic acid are produced in at least a 1:2 ratio. The invention furthermore relates to the production of a transgenic plants, preferably a transgenic crop plant, having an increased content of arachidonic acid and/or eicosapentaenoic acid. The invention additionally relates to specific nucleic acid sequences encoding for proteins with W -12-/ W -15-desaturase-, W -9-elongase-, W -8-desaturase- or W -5-desaturase-activity, nucleic acid constructs, vectors and transgenic plants containing said nucleic acid sequences.
MR susceptibility misregistration correction (1993)

The authors present a new in vivo method to correct the nonlinear, object-shape-dependent and material-dependent spatial distortion in magnetic resonance (MR) images caused by magnetic susceptibility variations. This distortion across the air/tissue interface before and after the correction is quantified using a phantom. The results are compared to the distortion-free computed tomography (CT) images of the same phantom by fusing CT and MR images using fiducials, with a registration accuracy of better than a millimeter. The distortion at the bone/tissue boundary is negligible compared to the typical MRI (MR imaging) resolution of 1 mm, while that at the air/tissue boundary creates displacements of about 2 mm (for G(x) 3.13 mT/m). This is a significant value if MRI is to provide highly accurate geometric measurements, as in the case of target localization for stereotaxic surgery. The correction scheme provides MR images with accuracy similar to that of CT: 1 mm. A new method to estimate the magnetic susceptibility of materials from MR images is presented. The magnetic susceptibility of cortical bone is measured using a SQUID magnetometer, and is found to be -8.86 ppm (with respect to air), which is quite similar to that of tissue (-9 ppm).
Superconducting nanowire single photon detectors fabricated from an amorphous Mo0.75Ge0.25 thin film (2014)

We present the characteristics of superconducting nanowire single photon detectors (SNSPDs) fabricated from amorphous Mo0.75Ge0.25 thin-films. Fabricated devices show a saturation of the internal detection efficiency at temperatures below 1 K, with system dark count rates below 500 cps. Operation in a closed-cycle cryocooler at 2.5 K is possible with system detection efficiencies exceeding 20% for SNSPDs which have not been optimized for high detection efficiency. Jitter is observed to vary between 69 ps at 250 mK and 187 ps at 2.5 K using room temperature amplifiers.
Distributed Cross-Layer Protocol Design for Magnetic Induction Communication in Wireless Underground Sensor Networks (2015)

Wireless underground sensor networks (WUSNs) enable many applications such as underground pipeline monitoring, power grid maintenance, mine disaster prevention, and oil upstream monitoring among many others. While the classical electromagnetic waves do not work well in WUSNs, the magnetic induction (MI) propagation technique provides constant channel conditions via small size of antenna coils in the underground environments. In this paper, instead of adopting currently layered protocols approach, a distributed cross-layer protocol design is proposed for MI-based WUSNs. First, a detailed overview is given for different communication functionalities from physical to network layers as well as the QoS requirements of applications. Utilizing the interactions of different layer functionalities, a distributed environment-aware protocol, called DEAP, is then developed to satisfy statistical QoS guarantees and achieve both optimal energy savings and throughput gain concurrently. Simulations confirm that the proposed cross-layer protocol achieves significant energy savings, high throughput efficiency and dependable MI communication for WUSNs.
Threat-Specific Security Risk Evaluation in the Cloud (2018)

Existing security risk evaluation approaches (e.g., asset-based) do not consider specific security requirements of individual cloud computing clients in the security risk evaluation. In this paper, we propose a threat-specific risk evaluation approach that uses various security attributes of the cloud (e.g., vulnerability information, the probability of an attack, and the impact of each attack associated with the identified threat(s)) as well as the client-specific security requirements in the cloud. Our approach allows a security administrator of the cloud provider to make fine-grained decisions for selecting mitigation strategies in order to protect the outsourced computing assets of individual clients based on their specific security needs against specific threats. This is different from the existing asset-based approaches where they do not have the functionalities to provide the security evaluation of the cloud with respect to specific threats. On the other hand, the proposed approach enables security administrators to compute a range of more effective client-specific countermeasures with respect to the importance of security requirements and threats. The experimental evaluation results demonstrate that effective security solutions vary due to specific threats prioritized by different clients for an application in the cloud. Further, the proposed approach is not limited to only the cloud-based systems, but can easily be adopted to other networked systems. We have also developed a software tool to support the proposed approach.
Mitochondrial mutations drive prostate cancer aggression (2017)

Nuclear mutations are well known to drive tumor incidence, aggression and response to therapy. By contrast, the frequency and roles of mutations in the maternally inherited mitochondrial genome are poorly understood. Here we sequence the mitochondrial genomes of 384 localized prostate cancer patients, and identify a median of one mitochondrial single-nucleotide variant (mtSNV) per patient. Some of these mtSNVs occur in recurrent mutational hotspots and associate with aggressive disease. Younger patients have fewer mtSNVs than those who diagnosed at an older age. We demonstrate strong links between mitochondrial and nuclear mutational profiles, with co-occurrence between specific mutations. For example, certain control region mtSNVs co-occur with gain of the MYC oncogene, and these mutations are jointly associated with patient survival. These data demonstrate frequent mitochondrial mutation in prostate cancer, and suggest interplay between nuclear and mitochondrial mutational profiles in prostate cancer.In prostate cancer, the role of mutations in the maternally-inherited mitochondrial genome are not well known. Here, the authors demonstrate frequent, age-dependent mitochondrial mutation in prostate cancer. Strong links between mitochondrial and nuclear mutational profiles are associated with clinical aggressivity.
Network-Assisted Dynamic Adaptation (NADA): A Unified Congestion Control Scheme for Real-Time Media (2020)

This document describes NADA (network-assisted dynamic adaptation), a
novel congestion control scheme for interactive real-time media
applications, such as video conferencing. In the proposed scheme, the
sender regulates its sending rate based on either implicit or explicit
congestion signaling, in a unified approach. The scheme can benefit
from explicit congestion notification (ECN) markings from network
nodes. It also maintains consistent sender behavior in the absence of
such markings, by reacting to queuing delays and packet losses
instead.
Data Enrichment Using Data Sources on the Web (2012)

As businesses seek to monetize their data, they are leveraging Web-based delivery mechanisms to provide publicly available data sources. Also, as analytics becomes a central part of many business functions such as customer segmentation, competitive intelligence and fraud detection, many businesses are seeking to enrich their internal data records with data from these data sources. As the number of sources with varying degrees of accuracy and quality proliferate, it is a non-trivial task to effectively select which sources to use for a particular enrichment task. The old model of statically buying data from one or two providers becomes inefficient because of the rapid growth of new forms of useful data such as social media and the lack of dynamism to plug sources in and out. In this paper, we present the data enrichment framework, a tool that uses data mining and other semantic techniques to automatically guide the selection of sources. The enrichment framework also monitors the quality of the data sources and automatically penalizes sources that continue to return low quality results.
Subjective VoIP speech quality evaluation based on network measurements (2002)

A system for measuring application-level voice over IP (VoIP) quality of service (QoS) is introduced. We also present a simple method for combining measurement data with speech coding simulation software, thus enabling reliable evaluation of subjective speech quality of the measured connection. An example measurement with mean opinion score (MOS) test results is presented and results are summarized.
Quantitative analysis of the fermentative metabolism of glycerol in <i>Escherichia coli</i> (2011)

Availability, low price, and high degree of reduction have made glycerol a highly attractive and exploited carbon source for the production of fuels and reduced chemicals. Here we report the quantitative analysis of the fermentative metabolism of glycerol in Escherichia coli through the use of kinetic modeling and metabolic control analysis (MCA) to gain a better understanding of glycerol fermentation and identify key targets for genetic manipulation that could enhance product synthesis. The kinetics of glycerol fermentation in a batch culture was simulated using a dynamic model consisting of mass balances for glycerol, ethanol, biomass, and 11 intracellular metabolites, along with the corresponding kinetic expressions for the metabolism of each species. The model was then used to calculate metabolic control coefficients and elucidate the control structure of the pathways involved in glycerol utilization and ethanol synthesis. The calculated flux control coefficients indicate that the glycolytic flux during glycerol fermentation is almost exclusively controlled by the enzymes glycerol dehydrogenase (encoded by gldA) and dihydroxyacetone kinase (DHAK) (encoded by dhaKLM). In agreement with the MCA findings, overexpression of gldA and dhaKLM led to significant increase in glycerol utilization and ethanol synthesis fluxes. Moreover, overexpression of other enzymes involved in the pathways that mediate glycerol utilization and its conversion to ethanol had no significant impact on glycerol utilization and ethanol synthesis, further validating the MCA predictions. These findings were then applied as a means of increasing the production of ethanol: overexpression of glycerol dehyrdogenase and DHAK enabled the production of 20 g/L ethanol from crude glycerol, a by-product of biodiesel production, indicating the potential for industrial scale conversion of waste glycerol to ethanol under anaerobic conditions.
Miniature SQUID susceptometer (1984)

We present a new dc superconducting quantum interference device (SQUID) configured as a susceptometer for the study of the magnetic properties of small (&lt;10 μm) particles and thin-film samples. The SQUID consists of two series pick-up loops wound in opposite sense over a hole in the groundplane and connected to remotely located tunnel junctions by low inductance transmission lines. An integrated field coil with provision for balance allows application of a magnetic field of 0–30 G to a sample positioned in either pick-up loop. For an applied field of 5 G the device having an intrinsic energy sensitivity of ∼25 h is able to resolve the superconducting transition of a 5-μm tin particle with a signal-to-noise ratio of ∼106.
Elemental Analysis of Sub-Hourly Ambient Aerosol Collections (2004)

Simultaneous multielement graphite furnace atomic absorption spectrometry was used to determine Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Sb, Se, and Zn in ambient air sampled at 170 L·min−1 for 30 min and collected as a slurry after dynamic preconcentration. In PM20 samples collected at College Park, MD, results were > 2σ above system blank in > 95% of samples for Al, Cd, Cu, Cr, Fe, Mn, Pb, and Zn, and > 2σ above system blank in > 80% of samples for As, Ni, and Se. Analyses of slurries of NIST SRM 1648, Urban Particulate Matter, were typically within 10% of expected values for all elements except Al, Cr, and Fe, elements for which deviations were mostly due to difficulties in transferring large particles. This problem will be reduced for urban fine particulate matter samples (PM2.5). Trends in the concentrations of elemental source markers were readily correlated with wind direction and other meteorological factors to identify the influences of local industrial emissions, including motor vehicle traffic, coal- and oil-fired power plants, and municipal incinerators. Factor analysis was applied to the 88-sample data set to extract 7 factors: urban dust, meteorological factors, incinerators, coal-fired power plants, Tour Bus emission, unknown As source, and oil-fired power plants. Factor analysis was also applied to an 18-sample data set representing 2.5 h averages of the 30 min data to simulate the effect of longer sample collection times. Only 6 factors were extracted from this data set, which shows that increased temporal resolution enhances the power of factor analysis to resolve sources. These results indicate that a wealth of detailed information is revealed at this level of temporal resolution.
Multiplex identification of bacteria in bacterial mixtures with surface‐enhanced Raman scattering (2009)

Abstract Surface‐enhanced Raman scattering (SERS) is a technique capable of identifying each component in a mixture because of its intrinsically narrow spectral bands. In a clinical setting, the identification of bacteria from its initial culture by collecting the colonies on the culture plate significantly decreases the analysis time and the cost. The identification of bacteria from their mixtures is attempted using SERS. A simple mixing procedure of bacterial samples and concentrated colloidal suspension is proven to be mostly satisfactory for the generation of the reproducible SERS spectra that can be used for bacterial identification. The mixture of three different but related bacterial species Shigella sonnei, Proteus vulgaris , and Erwinia amylovara and three Escherichia coli strains (BFK13, BHK7, DH5 α) are used as model systems to test the feasibility of the approach. The results indicate that it is possible to identify the composition of a bacterial mixture. This approach can easily be utilized for the bacteria originating from the same source with similar growth profiles. Copyright © 2009 John Wiley & Sons, Ltd.
Synthesis and Biological Evaluation of Non-Peptidic Cyclophilin Ligands (2003)

Peptidylprolyl isomerase cyclophilins play critical roles in a variety of biological processes. Recent findings that cyclophilins are present at high levels in the CNS and that cyclosporin A may possess neuroprotective/neurotrophic effects have prompted us to search for nonimmunosuppressant small molecule cyclophilin ligands. To this end, we report the lead identification through "virtual screening" and the synthesis of our first series of non-peptidic cyclophilin ligands, along with the preliminary biological results.
Double-random-phase encryption with photon counting for image authentication using only the amplitude of the encrypted image (2016)

We present a photon-counting double-random-phase encryption technique that only requires the photon-limited amplitude of the encrypted image for decryption. The double-random-phase encryption is used to encrypt an image, generating a complex image. Photon counting is applied to the amplitude of the encrypted image, generating a sparse noise-like image; however, the phase information is not retained. By not using the phase information, the encryption process is simplified, allowing for intensity detection and also less information to be recorded. Using a phase numerically generated from the correct encryption keys together with the photon-limited amplitude of the encrypted image, we are able to decrypt the image. Moreover, nonlinear correlation algorithms can be used to authenticate the decrypted image. Both amplitude-based and full-phase encryption using the proposed method are investigated. Preliminary computational results and performance evaluation are presented.
ChemInform Abstract: OPTICAL TO ELECTRICAL ENERGY CONVERSION‐ CADMIUM TELLURIDE‐BASED PHOTOELECTROCHEMICAL CELLS EMPLOYING TELLURIDE DITELLURIDE ELECTROLYTES (1976)

Abstract CdTe(n‐Typ)‐Photoelektroden können in 5m NaOH‐Elektrolyten durch Zusatz von Na 2 Te (bildet beim Auflösen Te 2‐ , das an CdTe zu Te 2 2‐ oxidierbar ist) stabilisiert werden.
A cascaded continuous-time ΣΔ modulator with 80 dB dynamic range (2004)

This paper presents the implementation of the first 2-1-1, cascaded continuous-time (CT) sigma-delta (/spl Sigma//spl Delta/) modulator. The successful realization is shown by measurements and a dynamic range of 80 dB is achieved. Special attenuation has been paid to the gain-error mismatch and a previously reported digital correction. Therefore, the modulator has been implemented on a circuit board to be able to test this nonideal behavior and to compensate for it. It could be shown, that cascaded CT /spl Sigma//spl Delta/ modulators have the potential to be integrated as high-speed, high-resolution circuits.
Categorization and Segmentation of Intestinal Content Frames for Wireless Capsule Endoscopy (2012)

Wireless capsule endoscopy (WCE) is a device that allows the direct visualization of gastrointestinal tract with minimal discomfort for the patient, but at the price of a large amount of time for screening. In order to reduce this time, several works have proposed to automatically remove all the frames showing intestinal content. These methods label frames as {intestinal content- clear} without discriminating between types of content (with different physiological meaning) or the portion of image covered. In addition, since the presence of intestinal content has been identified as an indicator of intestinal motility, its accurate quantification can show a potential clinical relevance. In this paper, we present a method for the robust detection and segmentation of intestinal content in WCE images, together with its further discrimination between turbid liquid and bubbles. Our proposal is based on a twofold system. First, frames presenting intestinal content are detected by a support vector machine classifier using color and textural information. Second, intestinal content frames are segmented into {turbid, bubbles, and clear} regions. We show a detailed validation using a large dataset. Our system outperforms previous methods and, for the first time, discriminates between turbid from bubbles media.