gebhart/patrepeval huggingface dataset:
Transmitter Identification Signal Analyzer (2008)

ATSC 방식의 지상파 디지털 TV 방송에서는 단일 주파수 망(Single Frequency Network: SFN) 구성 시 단일 주파수 사용에 따른 인접 송신기 혹은 중계기에 대한 간섭 문제가 발생한다. 이를 해결하기 위해 ATSC 권고에서는 각 송신기 및 중계기에 식별(Transmitter Identification: TxID) 신호를 할당하여 송신 및 중계 신호에 부가하여 전송하고, TxID 신호분석기를 통하여 각 송신기 및 중계기에 의해 발생되는 채널환경을 검출하여 망을 제어한다. 본 논문에서는 TxID 신호로 사용되는 Kasami 수열의 생성 및 DTV 신호로의 삽입방법에 관해 살펴보고, TxID 신호의 효율적인 분석을 위한 TxID 신호분석기의 구조를 제안한다. 또한, 수학적인 분석을 통해 제안된 TxID 신호분석기의 성능을 고찰하고, 전산실험 및 실험실 테스트를 통해 제안된 TxID 신호분석기의 성능을 검증한다. Single frequency network (SFN) design based on the Advanced Television Systems Committee (ATSC) specification, a terrestrial digital television (DTV) system, normally causes a interference problem, among signals from multiple transmitters or repeaters. To solve this, the ATSC recommended practice (RP) introduces a transmitter identification (TxID) signal embedded in a signal from each transmitter or repeater. A TxID signal analyzer is then used to detect the TxID signal, and following the analysis results, a SFN design can be adjusted. This paper discusses the generation and usages of Kasami sequence, is used the TxID signal. The configuration of the TxID signal analyzer to efficiently detect TxID signal is proposed and the results of theoretical performance analysis are provided. Moreover, computer simulation and laboratory test results are provided to evaluate the performance of TxID signal analyzer and the theoretical performance analysis.
Polarimetric sensor systems for airborne ISR (2014)

Over the last decade, polarimetric imaging technologies have undergone significant advancements that have led to the development of small, low-power polarimetric cameras capable of meeting current airborne ISR mission requirements. In this paper, we describe the design and development of a compact, real-time, infrared imaging polarimeter, provide preliminary results demonstrating the enhanced contrast possible with such a system, and discuss ways in which this technology can be integrated with existing manned and unmanned airborne platforms.
Purification and properties of an 8-hydroxy-5-deazaflavin-reducing hydrogenase from Methanobacterium thermoautotrophicum. (1982)

A coenzyme F430-reducing hydrogenase from Methanobacterium thermoautotrophicum has been purified 25-fold, to approximately 50% homogeneity. Following anaerobic preincubation in high salt under reducing conditions, the purified enzyme exhibits equal catalytic activity (turnover number = 725 s-1) toward the artificial 1-electron acceptor, methyl viologen, and the physiological 2-electron acceptor, 7,8-didemethyl-8-hydroxy-5-deazaflavin (F420). The enzyme had the following Km values (micromolarity) under the described assay conditions: 420 (methyl viologen, pH 9.0), 19 (F420, pH 7.2), 34 (Fo, 7.8-didemethyl-8-hydroxy-5-deazariboflavin, pH 7.2), 10 (H2, Fo as co-substrate, pH 7.2), 2 (H2, methyl viologen as co-substrate, pH 9.0). The native protein is oligomeric (apparent Mr greater than 500,000) and is composed of three distinct subunits with Mr - 40,000, 31,000, and 26,000 in the ratio of 2:2:1, leading to a minimum Mr = 170,000. In addition to 33 atoms of Fe and 24 atoms of acid-labile sulfur, the F420-hydrogenase contains 2.3 mol of FAD/mol of Mr - 170,000. This activity is chromatographically distinct from a smaller methanogen hydrogenase capable of rapid viologen reduction, but which only very slowly reduces 5-deazariboflavins.
Effect of immunosuppressive therapy on interferon γ release assay for latent tuberculosis screening in patients with autoimmune diseases: a systematic review and meta-analysis (2015)

Our meta-analysis showed that IGRA results are negatively affected by immunosuppressive therapy. IGRA alone may not be sufficiently sensitive to diagnose LTBI in patients on immunosuppressive therapy. Patients should preferably be screened for LTBI before initiation of immunosuppressive therapy, especially before anti-TNF therapy.
The design and implementation of HomeRF: a radio frequency wireless networking standard for the connected home (2000)

The HomeRF Working Group (WG) is a consortium of more than 100 companies from the computer, telecommunications, and consumer electronics industries. This group has developed an open specification called the Shared Wireless Access Protocol-Cordless Access (SWAP-CA) that enables radio frequency (RF) wireless connectivity between a diverse set of devices and computing resources in and around a typical home. Built around an RF spectrum with worldwide availability, SWAP-CA includes operational support for both managed and ad hoc networks of devices. It combines and extends wireless networking and cordless telephony into a single unified protocol allowing mobile devices to communicate via both voice and data traffic simultaneously over the Internet and/or over the public switched telephone network (PSTN). For batter-operated devices, it includes a power management mechanism than ensures connection longevity. The technology has been specifically optimized for consumer applications and price points, and, consequently, the HomeRF WG has the broad backing of the major corporate stakeholders interested in enabling tetherless networking within the home.
The Escherichia coli heat shock gene htpY: mutational analysis, cloning, sequencing, and transcriptional regulation (1993)

We have identified a new heat shock gene, designated htpY, located 700 bp upstream of the dnaK dnaJ operon. We cloned it and showed that it is transcribed clockwise vis-à-vis the Escherichia coli genetic map, in the same direction as the dnaK dnaJ operon. The htpY gene encodes a 21,193-Da polypeptide. Promoter mapping experiments and Northern (RNA) analysis showed that the htpY gene belongs to the classical heat shock gene family, because the transcription from its major promoter is under the positive control of the rpoH gene product (sigma 32) and resembles canonical E sigma 32-transcribed consensus promoter sequences. This conclusion has been strengthened by the construction and analysis of a phtpY-lacZ promoter fusion. Despite the fact that htpY null bacteria are viable, the expression of various E sigma 32 heat shock promoters is significantly decreased, suggesting that HtpY plays an important role in the regulation of the heat shock response. Consistent with this interpretation, overproduction of the HtpY protein results in a generalized increase of the heat shock response in E. coli.
ChemInform Abstract: Clay‐Catalyzed Rearrangement of Substituted Allyl Phenyl Ethers. Synthesis of ortho‐Allyl Phenols, Chromans, and Coumarans. (1991)

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.
Exact evaluation of memory size for multi-dimensional signal processing systems (2002)

Memory cost is typically responsible for up to 80% of the chip and/or board area of most video and image processing system realizations. We present a novel technique - founded on data-flow analysis - which allows us to address the problem of background memory size evolution for a given nonprocedural algorithm specification. Usually, the number of signal instances is huge, so a new data-flow model grouping scalar signals in so-called basic sets is proposed. The method also incorporates a way to trade-off memory size with computational and controller complexity.
Injection of Cerium Oxide Nanoparticles to Treat Spinal Cord Injury in Rats (2022)

This study investigated the effects of local injection of cerium oxide nanoparticles (CeONPs) in a rat spinal cord injury (SCI) model. Thirty-six adult male Wistar rats were divided into 4 groups: controls (healthy animals), sham (laminectomy), SCI (laminectomy+SCI induction), and treatment (laminectomy+SCI induction+intrathecal injection of CeONPs immediately after injury). SCI was induced using an aneurysm clip at the T12-T13 vertebral region. Motor performance and pain threshold tests were performed weekly; H&E staining and measurement of cavity sizes were performed 6 weeks after injury. The expression of granulocyte colony-stimulating factor (GCSF), P44/42 MAPK, P-P44/42 MAPK, Tau, myelin-associated glycoprotein(MAG) was evaluated after 6 weeks by Western blot. The Basso, Beattie, and Bresnahan locomotor scoring scales improved in animals receiving CeONPs compared with SCI animals. The cavity sizes were less in the treatment group. GCSF expression was similar in the animals receiving CeONPs compared with the SCI group but the expression of ERK1/ERK2 and phospho-ERK was lower than in the SCI group. Expression levels of Tau and MAG were significantly increased in treated animals compared to the SCI group. These data indicate that the use of CeONPs may improve motor functional recovery in SCI.
New genus and species of lithistid demosponges from submarine caves in Nuku Hiva (Marquesas Islands) and Tahiti Iti (Society Islands), French Polynesia (2021)

Lithistid demosponges are well known from limestone caves of karstic origin in the Mediterranean Sea. However, they have never been reported from submarine caves of volcanic origin in the South Pacific. Here, we describe and provide DNA barcodes for four new lithistid demosponges including one new genus. All species grew on basaltic rocks inside lava tubes on Nuku Hiva Island (Marquesas Islands) and Tahiti Iti peninsula on Tahiti Island (Society Islands) in French Polynesia. Three of the species have rhizoclone desmas as choanosomal skeletons and belong to the family Scleritodermidae (Microscleroderma miritatarata sp. nov. and Microscleroderma lava sp. nov.) and Siphonidiidae (Gastrophanella basaltica sp. nov.). The new genus Levispongia gen. nov. belongs to the family Corallistidae. The new species Levispongia meyeri gen. nov. sp. nov. has dicranoclone desmas, complex dichotrianes with strongly spinose upper surfaces of the cladome and microstyles as the only microscleres. Phylogenetic relationships of these new species are discussed and compared with other material from the Caribbean and Central to the West Pacific Ocean.urn:lsid:zoobank.org:pub:844E385C-9A92-4F1B-B85C-9C1E319CD13F
Detection of Li-ion battery failure and venting with Carbon Dioxide sensors (2020)

Li-ion battery thermal runaway is a critical safety issue for Electric Vehicles. The proposed global technical regulation No. 20 by the United Nations on Electric Vehicle Safety requires an advanced warning 5 minutes prior to the evolution of hazardous conditions caused by thermal runaway. To achieve this 5-min advanced warning, a robust and sensitive detection methodology is required. Gas venting is often a precursor of thermal runaway, and therefore the use of gas-based detection method was evaluated in this paper to explore its response and implementation within a battery pack. The composition of battery vent-gas during a thermal runaway event includes CO2, CO, H2 and volatile organic compounds (VOCs). Among these gas species, there is still some debate about which is most suitable for detection. To resolve this debate, the composition of vent-gas under different testing conditions is summarized from the literature and CO2 is proposed as the target gas species due to its significant presence and early occurrence in all venting events. After evaluating available sensors, the Non-Dispersive Infrared (NDIR) CO2 sensor is considered due to its robustness and cost effectiveness. To further clarify the responsiveness of the NDIR CO2 sensor, an overcharging experiment leading to cell venting was conducted with a prototype gas sensor suite. The measured CO2 concentrations of over 30,000 ppm were detected with the gas sensor. Lastly, we demonstrate how a representative venting experiment of a single cell can be used to guide and set the sensed CO2 threshold that will trigger an alarm in a battery pack volume.
Highly Conductive Freestanding Graphene Films as Anode Current Collectors for Flexible Lithium-Ion Batteries (2014)

The electrodes in lithium-ion batteries (LIBs) are typically films that are arranged on metal foil current collectors with a thickness of several tens of μm. Here, we report on the preparation of a thick free-standing graphene film synthesized by CVD as an alternative to Cu foil as an anode current collector. As a model system, MoS2 anodes with a flower-like morphology were anchored onto the surface of the thick graphene film. A hybrid and binder free anode without a conventional metal current collector exhibited an excellent capacity value of around 580 mAh/g (@50 mA/g) and reasonable charge/discharge cyclability. The work presented here may stimulate the use of graphene films as replacements for conventional current collectors and additive free electrode in LIBs.
Quinolobactin, a New Siderophore of Pseudomonas fluorescens ATCC 17400, the Production of Which Is Repressed by the Cognate Pyoverdine (2000)

Transposon mutant strain 3G6 of Pseudomonas fluorescens ATCC 17400 which was deficient in pyoverdine production, was found to produce another iron-chelating molecule; this molecule was identified as 8-hydroxy-4-methoxy-quinaldic acid (designated quinolobactin). The pyoverdine-deficient mutant produced a supplementary 75-kDa iron-repressed outer membrane protein (IROMP) in addition to the 85-kDa IROMP present in the wild type. The mutant was also characterized by substantially increased uptake of (59)Fe-quinolobactin. The 75-kDa IROMP was produced by the wild type after induction by quinolobactin-containing culture supernatants obtained from the pyoverdine-negative mutant or by purified quinolobactin. Conversely, adding purified wild-type pyoverdine to the growth medium resulted in suppression of the 75-kDa IROMP in the pyoverdine-deficient mutant; however, suppression was not observed when Pseudomonas aeruginosa PAO1 pyoverdine, a siderophore utilized by strain 3G6, was added to the culture. Therefore, we assume that the quinolobactin receptor is the 75-kDa IROMP and that the quinolobactin-mediated iron uptake system is repressed by the cognate pyoverdine.
ChemInform Abstract: Rh‐Catalyzed Reagent‐Free Ring Expansion of Cyclobutenones and Benzocyclobutenones. (2016)

Abstract The title reaction gives a variety of indanones [e.g. (II)] and poly‐substituted cyclopentenones [e.g. (VIII)] without additional oxidants or reductants.
Scalable Self-Organizing Overlays (2006)

Recent developments including peer-to-peer networks and application-level multicast have generated interest in overlays, and by extension in algorithms for automatically maintaining overlay structures. In this paper, we present a self-organizing protocol for forming and managing overlays that scales to at least tens of thousands of nodes. Previous algorithms target small scale overlays and do not scale well in terms of protocol overhead with the number of nodes. Our key contribution is to show how to apply the concept of hierarchy to overlay management to achieve scalability, without degrading the quality of the resulting overlay. We provide simulation results that show our hierarchical overlays incur a low delay penalty, make effective use of network bandwidth, and handle failures gracefully. We also demonstrate that there are significant advantages in using a selforganizing overlay as compared to the ad hoc techniques currently being used in peer-to-peer networking. I.
Mass spectrometry and Web 2.0 (2007)

The term Web 2.0 is a convenient shorthand for a new era in the Internet in which users themselves are both generating and modifying existing web content. Several types of tools can be used. With social bookmarking, users assign a keyword to a web resource and the collection of the keyword 'tags' from multiple users form the classification of these resources. Blogs are a form of diary or news report published on the web in reverse chronological order and are a popular form of information sharing. A wiki is a website that can be edited using a web browser and can be used for collaborative creation of information on the site. This article is a tutorial that describes how these new ways of creating, modifying, and sharing information on the Web are being used for on-line mass spectrometry resources.
Lattice strain and lattice expansion of the SrRuO3 layers in SrRuO3/PbZr0.52Ti0.48O3/SrRuO3 multilayer thin films (2002)

In SrRuO3/PbZr0.52Ti0.48O3/SrRuO3 multilayer thin films on SrTiO3 substrates the different lattice distortion behavior of the top and the bottom SrRuO3 film layer is found and characterized by means of transmission electron microscopy. The bottom SrRuO3 layer is compressively strained in the film plane by a constraint of the SrTiO3 substrate. In contrast, in the interface area of the top SrRuO3 layer, a lattice dilatation is measured not only in the film plane but also parallel to the film normal. The misfit strain, the lead interdiffusion and the oxygen concentration in this area are investigated and discussed as possible reasons for the unexpected lattice dilatation along the film normal direction.
Synthesis of Nuclear-Associated Proteins by Lymphocytes Within Minutes After Contact with Phytohemagglutinin (1972)

Abstract The interaction of lymphoid cells with phytohemagglutinin (PHA) gives rise to a series of chemical and morphologic changes that culminate in the mitosis of the lymphoid cell (1). Although mitosis is not detectable for 2 to 3 days after contact with PHA, earlier changes in the lymphocyte have been described (2–17). The molecular mechanism underlying the activation of the lymphocyte are unknown and little is known concerning the chemical nature of the proteins synthesized shortly after contact with PHA. Using a double isotope technique we have identified a class of nuclear proteins whose synthesis is stimulated within 20 min after contact with PHA. These proteins may be associated with nucleic acids and represent aggregates with a molecular weight greater than 1,000,000. Lymph nodes were obtained from strain 2 guinea pigs 2 to 6 weeks after injection with 0.1 ml of complete Freund's adjuvant into each of the foot pads. The lymph nodes were teased apart with fine pointed forceps and the released lymphocytes were washed once in medium. The resuspended cells were then filtered through two layers of cotton gauze, counted, diluted in medium, and aliquots of 1 ml containing 107 cells were distributed to 16 x 126 mm test tubes. The medium used in all experiments consisted of Eagle's minimal essential medium lacking leucine, supplemented with penicillin, streptomycin and nonessential amino acids. Cultures were incubated at 37°C in a humidified atmosphere containing 10% CO2.
Polyferrocenyldisiloxane from the Platinum-Catalyzed Reactions of Tertiary Bis(dimethylsilyl)ferrocene in a Polar Aprotic Solvent (2009)

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTPolyferrocenyldisiloxane from the Platinum-Catalyzed Reactions of Tertiary Bis(dimethylsilyl)ferrocene in a Polar Aprotic SolventDamion Miles, Jon Ward, and Daniel A. Foucher*View Author Information Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, Ontario, Canada M5B 2K3*Corresponding author. E-mail: [email protected]Cite this: Macromolecules 2009, 42, 22, 9199–9203Publication Date (Web):October 8, 2009Publication History Received20 August 2009Revised29 September 2009Published online8 October 2009Published inissue 24 November 2009https://pubs.acs.org/doi/10.1021/ma9018608https://doi.org/10.1021/ma9018608brief-reportACS PublicationsCopyright © 2009 American Chemical SocietyRequest reuse permissionsArticle Views629Altmetric-Citations30LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Catalysts,Polymerization,Polymers,Sandwich compounds,Solvents Get e-Alerts
Comparison of methods for exploiting symmetry in calculating the Fourier spectra of circularly symmetric functions (2020)

Four different methods for calculating the radial profile of the Fourier transform of a circularly symmetric function are discussed and evaluated. Applications to optics, in which the circularly symmetric function represents the distribution of field across a circular aperture, are many. The four approaches include: (1) numerical integration of the zero-order Hankel transform equation (using the Gauss–Kronrod method); (2) extraction of the radial profile of a two-dimensional Fourier transform; (3) the projection-transform method that makes use of the projection-slice theorem of Fourier analysis; and (4) the quasifast Hankel transform introduced by Siegman. The results indicate that the projection-transform method is the fastest method and that it has accuracy that is second only to numerical integration.
COVID-19: Famotidine, Histamine, Mast Cells, and Mechanisms (2021)

SARS-CoV-2 infection is required for COVID-19, but many signs and symptoms of COVID-19 differ from common acute viral diseases. SARS-CoV-2 infection is necessary but not sufficient for development of clinical COVID-19 disease. Currently, there are no approved pre- or post-exposure prophylactic COVID-19 medical countermeasures. Clinical data suggest that famotidine may mitigate COVID-19 disease, but both mechanism of action and rationale for dose selection remain obscure. We have investigated several plausible hypotheses for famotidine activity including antiviral and host-mediated mechanisms of action. We propose that the principal mechanism of action of famotidine for relieving COVID-19 symptoms involves on-target histamine receptor H<sub>2</sub> activity, and that development of clinical COVID-19 involves dysfunctional mast cell activation and histamine release. Based on these findings and associated hypothesis, new COVID-19 multi-drug treatment strategies based on repurposing well-characterized drugs are being developed and clinically tested, and many of these drugs are available worldwide in inexpensive generic oral forms suitable for both outpatient and inpatient treatment of COVID-19 disease.
ChemInform Abstract: Shaping up to Proteins (1996)

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.