238,688 research outputs found
The pan-European mobile radio system: Part I
No full textFollowing the launch of the Pan-European digital mobile radio (GSM) system its salient features are summarised in this tutorial review [I, 8]. Time Division Multiple Access (TDMA) with eight users per carrier is used at a multi-user rate of 27.1 kbit/s, demanding a channel equaliser to combat dispersion. The error protected chip-rate of the full-rate traffic channels is 22.8 kbit/s, while in half-rate channels is 11.4 kbit/s. There are two speech traffic channels, five different-rate data traffic channels and 14 various control and signalling channels to support the system's operation. A moderately complex, 13 kbit/s Regular Pulse Excited speech codec with long term predictor (LTP) is used, combined with an embedded three-class error correction codec and multi-layer interleaving to provide sensitivity-matched unequal error protection for the speech bits. An overall speech delay of 57.5 ms is maintained. Slow frequency hopping at 217 hops/s yields substantial performance gains for slowly moving pedestrians
pan-gene matrix in R
No full textThis code takes a binary gene matrix of 1s and 0s from QuartetS (ortholog prediction from amino acid FASTA files) output and sequentially adds each column, counting each row with one or more 1s. The process is repeated 1,000 times, each time the order of the columns being permuted. The output is a matrix in R where the variation of each permutation is contained in each row. A pan-gene curve can then be plotted by calculating the median of each column and incorporating variation into the curve by including all values.<br
A historical comment about the GVT in short interval
No full textIn this article, the author introduces the history, progress and method in the Goldbach-Vinogradov Theorem in short interval by which every sufficiently large odd integer could be expressed as the sum of three almost equal prime numbers.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000183488400018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701MathematicsCPCI-S(ISTP)
Pan-Tompkins++: A Robust Approach to Detect R-peaks in ECG Signals
No full textR-peak detection is crucial in electrocardiogram (ECG) signal processing as it is the basis of heart rate variability analysis. The Pan-Tompkins algorithm is the most widely used QRS complex detector for the monitoring of many cardiac diseases including arrhythmia detection. However, the performance of the Pan-Tompkins algorithm in detecting the QRS complexes degrades in low-quality and noisy signals. This article introduces Pan-Tompkins++, an improved Pan-Tompkins algorithm. A bandpass filter with a passband of 5--18 Hz followed by an N-point moving average filter has been applied to remove the noise without discarding the significant signal components. Pan-Tompkins++ uses three thresholds to distinguish between R-peaks and noise peaks. Rather than using a generalized equation, different rules are applied to adjust the thresholds based on the pattern of the signal for the accurate detection of R-peaks under significant changes in signal pattern. The proposed algorithm reduces the False Positive and False Negative detections, and hence improves the robustness and performance of Pan-Tompkins algorithm. Pan-Tompkins++ has been tested on four open source datasets. The experimental results show noticeable improvement for both R-peak detection and execution time. We achieve 2.8% and 1.8% reduction in FP and FN, respectively, and 2.2% increase in F-score on average across four datasets, with 33% reduction in execution time. We show specific examples to demonstrate that in situations where the Pan-Tompkins algorithm fails to identify R-peaks, the proposed algorithm is found to be effective. The results have also been contrasted with other well-known R-peak detection algorithms.</p
Compressive Sensing for PAN-Sharpening
No full textBased on compressive sensing framework and sparse reconstruction technology, a new pan-sharpening method, named Sparse Fusion of Images (SparseFI, pronounced as sparsify), is proposed in [1]. In this paper, the proposed SparseFI algorithm is validated using UltraCam and WorldView-2 data. Visual and statistic analysis show superior performance of SparseFI compared to the existing conventional pan-sharpening methods in general, i.e. rich in spatial information and less spectral distortion. Moreover, popular quality assessment metrics are employed to explore the dependency on regularization parameters and evaluate the efficiency of various sparse reconstruction toolboxes
Letter to B. R. Colson from the Pan-American Life Insurance Company
No full textLetter from the Pan-American Life Insurance Company to B. R. Colson about a loan application for Dixieland College in Gainesville, Florida. The typed correspondence is on Pan-American Life Insurance Company letterhead and is signed by the agency directors, Simmons and Mabry
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
XIII General Ordinary Congress of the Pan American Sports Organization
No full textThis manuscript titled "Sport, Treasure of Youth: Take Care of it " was written by Mario Vasquez R., President of The Executive Committee of the Pan American Sports Organization. The manuscript is also known until title ""XIII General Ordinary Congress of the Pan American Sports Organization" or "XIII Congreso Ordinario de la Organización Deportiva Panamericana" The book discusses the Pan American Sports Organization and the objectives and ideals of the organization. It begins with the agenda for the inauguration of the organization that took place on October 8-9 in 1975, consisting of opening remarks, working sessions, commission meetings, and plenary sessions. The book also discusses the speech made by Lord Killanin, who was the President of the International Olympic Committee, at the Inauguration of the Pan American Sports Organization General Assembly. Paso's new executive committee is also given, with images of each of the members provided. The Act of Treasury Transfer is also pCall number for this book is: GV 586 P35 1975
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
“Sergipanamericanos”: a mídia televisiva de Sergipe no Pan Rio-2007
No full textEste estudo analisou a cobertura jornalística sobre os atletas sergipanos que participaram dos Jogos Pan-Americanos do Rio de Janeiro a partir da mídia televisiva. O material de análise desta pesquisa descritiva, com enfoque qualitativo, foi uma matéria veiculada em dezembro de 2007 em uma emissora local que apontou a retrospectiva deste grande evento esportivo para Sergipe. Há uma evidente tentativa de “sergipanizar” os atletas em função da naturalidade, ainda que estes residam e treinem fora do estado. A estratégia da mídia televisiva recorre à dialética local-global para criar entre os telespectadores um sentimento de identidade com os atletas.Rede cede
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