1,720,964 research outputs found
Dıagnosıs and Segmentatıon of S1 and S2 Heart Sounds with Dıgıtal
No full textListening with stethoscope is a preferential method that the doctors use in order to
differentiate normal cardiac systems from the abnormal ones that come out. On the
other hand, with the ECG method which is used to diagnosis heart abnormalities, is
experienced the difficulties at diagnosis heart murmur and abnormal heart sounds. At
the health center or village clinic, due to use of low cost equipment and deficiency of
medical expert, the heart auscultation is preferred because of diagnosis. But, for the
diagnosis of heart abnormalities, doctor must need experience and skill with traditional
auscultation equipment. To determinate of heart abnormalities and segmentation of
heart sounds, development auxiliary systems should be important for doctors who have
not experience and skills. In this thesis, a system has been developed for doctors that it
can be assist to doctor and it analyze the heart sounds using the Digital Signal
Processing (DSP) technique. In this system, sounds that are taken with electronic
stethoscope will be untied and sounds will be subjected to Digital Signal Processing
technique. These techniques are Fast Fourier Transform (FFT), Discrete Fourier
Transform (DFT), Shannon Energy, and Power Spectrum Density (PSD). For more
powerful application, sounds are more convenient using Hamming, Hanning and
Blackman windowing functions for DSP technique. As a result of, these DSP
techniques will be comparing and optimum DSP technique and windowing function
will be chose for heart sound analysis.Kalbin dinlenilmesi (kalbin çalışması ve kan akışı sırasında meydana gelen seslerin
izlenmesi), kalp hastalıklarının teşhisinde temel bir yöntemdir. Kalp hastalıklarının
teşhisinde kullanılan EKG yöntemi ile bazı yapısal anormalliklerin, kalp üfürümlerinin
ve anormal seslerin teşhisinde zorluklarla karşılaşılmaktadır. Birincil sağlık
kuruluşlarında düşük maliyetli cihaz kullanımı ve EKG bulgularının yorumlanabilmesi
için uzman hekim gerekliliği nedeniyle teşhis ve izleme amacıyla dinleme yöntemi
tercih edilir. Fakat geleneksel dinleme cihazları ile yapılan dinlemelerde teşhise
ulaşabilmek için hekimlerin uzun yıllar boyunca elde edilebileceği tecrübe ve
deneyimlere ihtiyacı vardır. Bu deneyime sahip olmayan hekimler için kalpteki
anormalliğin tespit edilebilmesi, kalp seslerinin ayrıştırılabilmesi için yardımcı
sistemlerin geliştirilmesi önem arz etmektedir. Bu tez çalışmasında hekime yardımcı
olabilecek, kalp seslerinin görüntülendiği, Sayısal İşaret İşleme (Sİİ) teknikleri
kullanılarak analizlerinin yapıldığı, S1 ve S2 seslerinin tespit edilebildiği bir sistem
geliştirilmiştir. Geliştirilen sistem ile elektronik steteskoptan alınan ses paketlerinin
formatı çözülerek Sİİ tekniklerinden Ayrık Fourier Dönüşümü (AFD), Hızlı Fourier
Dönüşümü (HFD), Shannon Enerji ve Güç Spektrum Yoğunluğu (PSD) uygulanmıştır.
Sİİ uygulamasının daha etkili ve hızlı olabilmesi için Hamming, Hanninig ve
Blackman pencereleme fonksiyonları kullanılarak, Sİİ için daha kullanışlı hale
getirilmiştir. Sonuç olarak bu tez çalışmasında pencereleme ve Sİİ teknikleri
karşılaştırılarak kalp seslerinin incelenmesi için en uygun Sİİ metodu belirlenmiştir
DEVELOPING AGRICULTURAL IRRIGATION TECHNOLOGY COMPATIBLE WITH NATIONAL ENERGY EFFICIENCY POLICY
No full textIEEE International Symposium on INnovations in Intelligent SysTems and Applications (INISTA) -- JUN 19-21, 2013 -- BULGARIAWhen you look at the usage percentage of water resources in the world in terms of sectors you figure out that it is mostly used in agricultural production with 69 percent of the rate. It is vital that managing such kind of resource perfectly and supplying it to the needs of human being is as important as water itself if you pay attention the earth is static and the population has been rising continuously. When the studies inspected, there are a lot of information concerning the conscious and controlled usage of agricultural water. However the studies have calculated the irrigation periods looking soil moisture, temperature, plant diversity and other parameters. In the irrigation plan offered in the study, it was determined that via night-irrigation and caring the needs of the plants, 20,46 percent of the water saving and 23,9 percent of the energy saving were provided. 20,46 percent of the water saving shows that water resources will be able to used longer if you take care that 69 percent of existing water resources is being used in agricultural irrigation.IEEE,Bulgarian Sci Acad,Bulgarian Acad Sci, Inst Informat & Commun Technologies,IEEE Bulgarian Sec
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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