gebhart/patrepeval huggingface dataset:
A Fully Parallel Architecture for Designing Frequency-Agile and Real-Time Reconfigurable FPGA-Based RF Digital Transmitters (2017)

Real-time frequency agility is one of the key limitations of current all-digital transmitters (ADTs). In this paper, to address this problem, an ADT based on direct-RF generation is proposed and implemented in a field-programmable gate array (FPGA). To achieve this, the pulse encoding is performed after the digital upconversion, which presents challenges in the pulse encoder implementation. However, the proposed design considerably improves the frequency agility when compared with current state-of-the-art approaches. Two different pulse encoders were designed in this paper, one is based on pulsewidth modulation (PWM) and the other on delta-sigma modulation (ΔΣM). These units are implemented with high parallelization to achieve the required equivalent sampling rates. The proposed design enables the implementation of all-digital RF transmitters in FPGA with a widely tunable carrier frequency. In this paper, a variation from 0.1 up to 6 GHz of carrier frequency, with a maximum frequency resolution of 1.5625 MHz, is demonstrated. Measurement results in terms of signal-to-noise ratio (SNR) and error-vector magnitude are presented and discussed. In the case of the PWM, maximum SNRs of 39 and 36 dB were obtained for a 5 and 10 MBd of symbol rates (SRs). In the case of ΔΣM, maximum SNRs of 38 and 35 dB were obtained for 20 and 40 MBd of the SR.
Effect of Time and Temperature on Thermal Barrier Coating Failure Mode Under Oxidizing Environment (2008)

Thermal barrier coatings (TBCs) have been recently introduced to hot section components, such as transition pieces and the first two stages of turbine blades and vanes of advanced F, G, and H class land-based turbine engines. The TBC is typically applied on metallic-coated components. The metallic bond coat provides oxidation and/or corrosion protection. It is generally believed that the primary failure mode of TBCs is delamination and fracture of the top ceramic coating parallel to the bond coat in the proximity of the thermally grown oxide (TGO) between coatings. One of the concerns associated with the use of a TBC as a prime reliant coating is its long-term stability. The effect of long-term operation at typical land based turbine operating temperatures of below 1010°C (1850°F) of the failure mode of TBCs is unknown. Long-term isothermal tests were conducted on the thermal barrier-coated specimens at three temperatures, 1010°C (1850°F), 1038°C (1900°F), and 1066°C (1950°F), to determine the effects of long term exposure on the TBC failure location (mode). Following the isothermal testing, the samples were destructively examined to characterize the degradation of the TBC and determine the extent of TGO cracking, TGO growth, bond coat oxidation, and TBC failure location after long term exposure for up to 18,000h. Optical microscopy and a scanning electron microscope (SEM) attached with an energy dispersive spectroscopy (EDS) system were used to study the degradation of the TBC and bond coatings. The results showed that long term isothermal exposure leads to a change in the TBC failure mode from the delamination of the TBC at the TGO∕TBC interface to the internal oxidation of the bond coat and bond coat delamination. In this paper, the effect of long-term exposure on the delamination of TBC and the bond coat failure mode is discussed.
In Vitro Detection of Porphyrin-Producing Wound Bacteria with Real-Time Fluorescence Imaging (2020)

<b>Aim:</b> Fluorescence imaging can visualize polymicrobial populations in chronic and acute wounds based on porphyrin fluorescence. We investigated the fluorescent properties of specific wound pathogens and the fluorescence detected from bacteria in biofilm. <b>Methods:</b> Utilizing Remel Porphyrin Test Agar, 32 bacterial and four yeast species were examined for red fluorescence under 405 nm violet light illumination. Polymicrobial biofilms, supplemented with δ-aminolevulinic acid, were investigated similarly. <b>Results:</b> A total of 28/32 bacteria, 1/4 yeast species and polymicrobial biofilms produced red fluorescence, in agreement with their known porphyrin production abilities. <b>Conclusion:</b> These results identify common wound pathogens capable of producing porphyrin-specific fluorescence and support clinical observations using fluorescence imaging to detect pathogenic bacteria in chronic wounds.
Design and implementation of downloading tool based on ML7098 (2005)

A new kind of tool to download the code from SRAM to FLASH was needed in order to simulate the debugging of softwareduring the period of developing RAM embedding system. The chip information of FLASH and a method to design and implement a toolof downloading execute code by serial port, which was explained following analysis of the boot mode of ML7098 were introduced, in-cluding the instruction format of boot loader receiver, PS software and PC software. Being a pure software product, it costs low andsuits to be used in the period of development and batch production.
Rapid Association Learning in the Primate Prefrontal Cortex in the Absence of Behavioral Reversals (2010)

The PFC plays a central role in our ability to learn arbitrary rules, such as "green means go." Previous experiments from our laboratory have used conditional association learning to show that slow, gradual changes in PFC neural activity mirror monkeys' slow acquisition of associations. These previous experiments required monkeys to repeatedly reverse the cue-saccade associations, an ability known to be PFC-dependent. We aimed to test whether the relationship between PFC neural activity and behavior was due to the reversal requirement, so monkeys were trained to learn several new conditional cue-saccade associations without reversing them. Learning-related changes in PFC activity now appeared earlier and more suddenly in correspondence with similar changes in behavioral improvement. This suggests that learning of conditional associations is linked to PFC activity regardless of whether reversals are required. However, when previous learning does not need to be suppressed, PFC acquires associations more rapidly.
Clotting factor concentrates given to prevent bleeding and bleeding-related complications in people with hemophilia A or B (2011)

There is strong evidence from randomised controlled trials and observational trials that prophylaxis preserves joint function in children with hemophilia as compared to on-demand treatment. There is insufficient evidence from randomised controlled trials to confirm the observational evidence that prophylaxis decreases bleeding and related complications in patients with existing joint damage. Well-designed randomised controlled trials and prospective observational controlled studies are needed to establish the best prophylactic regimen and to assess the effectiveness of prophylactic clotting factor concentrates in adult patients.
Reply to “Significance of a Single-Nucleotide Primer Mismatch in Hepatitis B Virus Real-Time PCR Diagnostic Assays” (2011)

We established a hepatitis B virus (HBV) DNA quantification system based on Taq Man chemistry, and it has been used not only in our laboratory but also in a commercial laboratory in Japan. This system has been working very well ([2][1]). In every assay, we use copy control of HBV DNA as described in
Synthesis of Homochiral 2‐C‐Trifluoromethyl D‐ and L‐Ribose via Trifluoromethylation of Pentopyranosid‐2‐uloses. (2003)

Abstract For Abstract see ChemInform Abstract in Full Text.
Ultraviolet laser ablation of organic polymers (1989)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltraviolet laser ablation of organic polymersR. Srinivasan and Bodil BrarenCite this: Chem. Rev. 1989, 89, 6, 1303–1316Publication Date (Print):September 1, 1989Publication History Published online1 May 2002Published inissue 1 September 1989https://pubs.acs.org/doi/10.1021/cr00096a003https://doi.org/10.1021/cr00096a003research-articleACS PublicationsRequest reuse permissionsArticle Views2781Altmetric-Citations521LEARN 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
Femotosecond switching in a dual-core-fiber nonlinear coupler (1988)

We report all-optical switching of 100-fsec pulses in a fused-quartz dual-core-fiber directional coupler. The length of the device is 0.5 cm, and the switching power is 32 kW. Pulses are routed to either of two separate fiber guides, depending on the input power. Measurements of pulse reshaping by the nonlinear coupler provide compelling evidence of the device's ability to response on a femotosecond time scale.
Inter-Area Resonance in Power Systems From Forced Oscillations (2015)

This paper discusses a recent event in the western American power system when a forced oscillation was observed at a frequency that was close to a well-known 0.38-Hz inter-area electromechanical mode frequency of the western system. The event motivates a systematic investigation in this paper on the possibility of resonant interactions between forced oscillations and electromechanical inter-area oscillatory modes in power systems. When the natural oscillatory mode of a power system is poorly damped, and the forced oscillation occurs at a frequency close to system mode frequency at critical locations for the mode, resonance is observed in simulation test cases of the paper. It is shown that the MW oscillations on tie-lines can be as high as 477 MW from a 10-MW forced oscillation in Kundur test system because of resonance. This paper discusses the underlying system conditions and effects as related to resonance in power systems caused by forced oscillations and discusses ways to detect such scenarios using synchrophasors. Simulated data from Kundur two-area test power system as well as measurement data from western American power system are used to study the effect of forced oscillations in power systems.
The Role of Progesterone in Traumatic Brain Injury (2011)

Espinoza, Tamara R. MD; Wright, David W. MDEditor(s): Glenn, Mel B. MD; (Editor) Author Information
Cloning and sequence of a region encoding a surface polysaccharide of Vibrio cholerae O139 and characterization of the insertion site in the chromosome of Vibrio cholerae O1 (1996)

Vibrio cholerae serogroup O139 Bengal is the first documented serogroup other than O1 to cause epidemic cholera. The O139 Bengal strains are very similar to V. cholerae serogroup O1 biotype El Tor strains. The major differences between the two serogroups are that O139 Bengal contains a distinct O antigen and produces a polysaccharide capsule. We previously described three TnphoA mutants of O139 strain AI1837 which abolish both O antigen and capsule production. These TnphoA insertions were mapped to a 21.5 kb EcoRI fragment of the O139 chromosome. We describe here the cloning and mapping of this 21.5 kb EcoRI fragment and it was shown to complement each of the mutants in trans to produce O antigen and capsule. The EcoRI fragment contains 13 kb of DNA that is specific to O139 and 8.5 kb of DNA that is common to O1 and O139. Sequence analysis of the 13 kb of O139-specific DNA revealed that it contains 11 open reading frames all of which are transcribed in the same direction. Eight of the 11 open reading frames are homologous to sugar biosynthesis genes from other organisms. Using extended polymerase chain reactions, we show that the extent of the DNA region in O139 that is not present in O1 is approximately 35 kb. The site of insertion of this O139-specific DNA in the O1 chromosome was mapped to the rfbO1 region. We also demonstrate that O139 Bengal strain AI1837 contains a deletion of 22 kb that in serogroup O1 strains contains the rfb region. Therefore, O139 Bengal probably arose from an O1 strain that had undergone genetic rearrangements including deletion of the O1 rfb region and acquisition of a 35 kb region of DNA which encodes O139 surface polysaccharide.
Coiled-Tubing-Conveyed Perforating in Shale (2011)

Abstract This is a study of the development and ultimate use of the CT (Coiled Tubing) Firing Transfer System used in three different scenarios and is a comprehensive examination of what specifically is required for use and the contrast between past and present methods in order to quantify perforating efficiency. The Coiled-Tubing-Conveyed CT Firing Transfer System has greatly improved Coiled Tubing perforating efficiencies when multiple zones are to be perforated during a single run in a well. Cost, capability and time, (cost of time) have always been limiting factors in bringing oil or gas to market profitably. The CT Firing Transfer System has been used in many hundreds of wells. An estimated 15,700 individual CT Firing Transfer Systems and perforating guns have fired over 90,000 perforating charges with a very high degree of reliability. The savings at the well site are substantial in direct imbedded equipment and maintenance costs savings to the end user over a period of just 3 years. The simplicity and methods of its use in many different scenarios have been developed and are in use successfully. Although originally developed for Coiled Tubing, the CT Firing Transfer System has also been used for Tubing Conveyed Perforating (TCP) applications.
Synthesis of Kojic Acid Derivatives Containing Phenolic Hydroxy Groups. (2003)

Abstract For Abstract see ChemInform Abstract in Full Text.
Complex Susceptibilities of Sr-doped YBa2Cu3O7-d Synthesized by the Polymerized Complex Method. (1994)

We measured complex susceptibilities of Sr-doped YBa2Cu3O7-d superconductors, YBa2-xSrxCu3O7-d (x=0-1.0) and determined the onset temperature of the superconducting transition. The samples were synthesized by the modified polymerized complex method. With increasing x, the onset temperature decreased, although the depletion was not large as those for Sr-doped YBa2Cu4Oy. Measurements of the phonon Raman spectra have revealed that with increasing x the frequencies of the Ba, Cu(2) and apex oxygen O(4) vibrational modes along c-axis change. Besides, at about 570 cm-1, a small growth of a peak was observed with increasing x, which may be caused by oxygen disorder in the CuO chains. But no appreciable changes in hole density were found from optical absorption spectra. 1
Analysis of a Gaussian process and feed-forward neural networks based filter for forecasting short rainfall time series (2013)

In this paper, an analysis of kernel (GP) and feedforward neural networks (FFNN) based filter to forecast short rainfall time series is presented. For the FFNN, the learning rule used to adjust the filter weights is based on the Levenberg-Marquardt method and Bayesian approach by the assumption of the prior distributions. In addition, a heuristic law is used to relate the time series roughness with the tuning process. The input patterns for both NN-based and kernel models are the values of rainfall time series after applying a time-delay operator. Hence, the NN's outputs will tend to approximate the current value of the time series. The time lagged inputs of the GP and their covariance functions are both determined via a multicriteria genetic algorithm, called NSGA-II. The optimization criteria are the quantity of inputs and the filter's performance on the known data which leads to Pareto optimal solutions. Both filters - FFNN and GP Kernel - are tested over a rainfall time series obtained from La Sevillana establishment. This work proposed a comparison of well-known filter referenced in early work where the contribution resides in the analysis of the best horizon of the forecasted rainfall time series proposed by Bayesian adjustment. The performance attained is shown by the forecast of the next 15 months values of rainfall time series from La Sevillana establishment located in (-31° 1'22.46"S, 62°40'9.57"O) Balnearia, Cordoba, Argentina.
Client-side Mobile Visual Search (2014)

Visual search systems present a simple way to obtain information about our surroundings, our location or an object of interest. Typically, mobile applications of visual search remotely connect to large-scale systems capable of dealing with millions of images. Querying such systems may induce considerable delays, which can severeley harm usability or even lead to complete rejection by the user. In this paper, we investigate an interim solution and system design using a local visual search system for embedded devices. We optimized a traditional visual search system to decrease runtime and also storage space in order to scale to thousands of training images on current off-the-shelf smartphones. We demonstrate practical applicability in a prototype for mobile visual search on the same target platform. Compared with the unmodified version of the pipeline we achieve up to a two-fold speed-up in runtime, save 85% of storage space and provide substantially increased recognition performance. In addition, we integrate the pipeline with a popular Augmented Reality SDK on Android devices and use it as a pre-selector for tracking datasets. This allows to instantly use a large number of tracking targets without requiring user intervention or costly server-side recognition.
Multivariate determination of glucose in whole blood by attenuated total reflection infrared spectroscopy. [Erratum to document cited in CA111:93227] (1995)

ADVERTISEMENT RETURN TO ISSUEPREVArticleMultivariate determination of glucose in whole blood by attenuated total reflection infrared spectroscopy. [Erratum to document cited in CA111:93227]H. M. Heise, R. Marbach, G. Janatsch, and J. D. Kruse-JarresCite this: Anal. Chem. 1995, 67, 4, 775Publication Date (Print):February 15, 1995Publication History Published online1 May 2002Published inissue 15 February 1995https://pubs.acs.org/doi/10.1021/ac00100a014https://doi.org/10.1021/ac00100a014research-articleACS PublicationsRequest reuse permissionsArticle Views74Altmetric-Citations3LEARN 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
Influence of bath temperature on microstructure and NH3 sensing properties of chemically synthesized CdO thin films (2019)

Abstract Cadmium oxide (CdO) thin films were synthesized using chemical bath deposition (CBD) method from aqueous cadmium nitrate solution. The bath temperatures were maintained at room temperature (25 °C) and at higher temperature (80 °C). The structural studies revealed that the films showed mixed phases of CdO and Cd(OH) 2 with hexagonal/monoclinic crystal structure. Annealing treatment removed the hydroxide phase and the films converted into pure CdO with cubic, face centered crystal structure. SEM micrographs of as-deposited films revealed nanowire-like morphology for room temperature deposited films while nanorod-like morphology for high temperature deposited films. However, cube-like morphology was observed after air annealing. Elemental composition was confirmed by EDAX analysis. Band gap energies of the as-deposited films varied over the range of 3 eV to 3.5 eV, whereas the annealed films showed band gap energy variation in the range of 2.2 eV to 2.4 eV. The annealed films were successfully investigated for NH 3 sensing at different operating temperatures and at different gas concentrations. The room temperature synthesized film showed a response of 17.3 %, whereas high temperature synthesized film showed a response of 13.5 % at 623 K upon exposure to 24 ppm of NH 3 .
Altered expression of CD44 isoforms in squamous-cell carcinomas and cell lines derived from them (1996)

CD44 is a transmembrane glycoprotein that binds hyaluronan, extracellular matrix proteins and growth factors. Multiple isoforms of CD44 are generated by alternative splicing of 10 separate exons (V1-V10). Expression of the variable exons has been correlated with tumour progression and metastasis in a range of cell types. However, multiple CD44 isoforms are expressed by normal stratified squamous epithelia, such as the epidermis and the lining of the oral cavity. The purpose of our study was to examine CD44 expression in squamous-cell carcinomas (SCC). By immunofluorescence we found reduced expression of one or more of the variant exons in a series of 13 oral SCC, with loss being most common in poorly differentiated tumours. Of the exons we examined, V3 was lost most frequently, but otherwise there was no consistent pattern as to which exons (V4/5, 6, 8) were missing. We also studied CD44 expression in a range of SCC lines, using Western blotting and semi-quantitative RT-PCR. All lines showed reduced expression of the terminal differentiation marker involucrin. Two lines showed selective loss of the largest forms of CD44 and one failed to express any of the variant exons. These cell lines, therefore, provide a useful experimental model with which to study the biological significance of exon loss in SCC.
Scanning Transmission Electron Tomography and Electron Energy Loss Spectroscopy of Silicon Metalattices (2020)

Transmission electron microscopy, scanning transmission electron tomography, and electron energy loss spectroscopy were used to characterize three-dimensional artificial Si nanostructures called "metalattices", focusing on Si metalattices synthesized by high-pressure confined chemical vapor deposition in 30-nm colloidal silica templates with ~7 and ~12 nm "meta-atoms" and ~2 nm "meta-bonds". The "meta-atoms" closely replicate the shape of the tetrahedral and octahedral interstitial sites of the face-entered cubic colloidal silica template. Composed of either amorphous or nanocrystalline silicon, the metalattice exhibits long-range order and interconnectivity in two-dimensional micrographs and three-dimensional reconstructions. Electron energy loss spectroscopy provides information on local electronic structure. The Si L2,3 core-loss edge is blue-shifted compared to the onset for bulk Si, with the meta-bonds displaying a larger shift (0.55 eV) than the two types of meta-atoms (0.30 and 0.17 eV). Local density of state calculations using an empirical tight binding method are in reasonable agreement.
Time domain multiconductor transmission line analysis using effective internal impedance (2002)

A compact skin effect circuit model is used to formulate a time domain boundary condition for lossy transmission lines. The resulting lossless-like multiconductor equations can be used in various time domain calculations, including FDTD.