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Automatic Heart Sound Analysis for Tele-Cardiac Auscultation
Sumeth Yuenyong,Waree Kongpravechnon,Kanokwech Tungpimolrut,Akinori Nishihara 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper presents heart sound signal processing that is a part of an automatic tele-auscultation system. Segmentation of the heart sound is performed using ECG signal as reference. Feature vector is constructed for each cardiac cycle by analyzing the systole and diastole of each cycle by applying discrete wavelet transform. Features are classified using pattern recognition neural network. The study incorporates four types of valve-related cardiac disorder that are normally diagnosed by auscultation: aortic regurgitation, aortic stenosis, mitral regurgitation and mitral stenosis. The result shows that for limited set of heart sounds, correct classification can be achieved
Physiological character and molecular mapping of leaf-color mutant wyv1 in rice (Oryza sativa L.)
Xian-chun Sang,Li-kui Fang,Yuenyong Vanichpakorn,Ying-hua Ling,Peng Du,Fang-ming Zhao,Zheng-lin Yang,Guang-hua He 한국유전학회 2010 Genes & Genomics Vol.32 No.2
The seed of an excellent indica restorer line Jinhui10 (Oryza sativa L. ssp. indica) was treated by ethyl methanesulfonate (EMS); a leaf-color mutant displaying distinct phenotype throughout development grown in paddy field was identified from the progeny. The mutant leaf showed white-yellow at seedling stage and then turned to yellow-green at tillering stage, after that, virescent color appeared until to maturity. The mutant was thus temporarily designed as wyv1. The chlorophyll contents decreased significantly and the changing was consistent with the chlorotic level of wyv1 leaves. Chlorophyll fluorescence kinetic parameters measured at the seedling stage showed that co-efficiency of photochemical quenching (qP),actual photosystem II efficiency (ΦPS II), electron transport rate (ETR) and initial chlorophyll fluorescence level (Fo), net photosynthetic rate (Pn) and maximum photochemical efficiency (Fv / Fm) significantly decreased in severe chlorotic leaf of the mutant compared with that of wild type. However,no significant differences were observed for Pn and Fv/Fm between virescent leaf and normal green leaf. Genetic analysis suggested that the mutant phenotype was controlled by a single recessive nuclear gene which was finally mapped between SSR marker Y7 and Y6 on rice chromosome 3 based on F2 population of Xinong1A / wyv1. Genetic distances were 0.06 cM and 0.03 cM respectively, and the physical distance was 84kb according to the sequence of indica rice 9311. The results must facilitate map-based cloning and functional analysis of WYV1 gene.