2009 14th National Biomedical Engineering Meeting最新文献

Hemodynamic correlates of mental arithmetic task in migraine 偏头痛患者心算任务的血流动力学相关性

2009 14th National Biomedical Engineering Meeting Pub Date : 2011-07-02 DOI: 10.1109/biyomut.2009.5130330

Ebru Unlu, H. Bolay, A. Akın

引用次数: 4

Numerical simulation of flow through stenotic artery 狭窄动脉血流的数值模拟

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130387

H. Tarman

引用次数: 0

Delta oscillatory responses to somatosensory stimuli in blind humans 盲人对体感刺激的δ振荡反应

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130381

A. Oniz, B. Aydin, Cagdas Guducu, M. Ozgoren

{"title":"Delta oscillatory responses to somatosensory stimuli in blind humans","authors":"A. Oniz, B. Aydin, Cagdas Guducu, M. Ozgoren","doi":"10.1109/BIYOMUT.2009.5130381","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130381","url":null,"abstract":"The aim of this study was to investigate the delta oscillatory responses to non-painful tactile stimuli for the blind subjects. The measurements were performed with thirteen blind subjects (15.07 age ±1.65, 10 male) and thirteen healthy subjects (15.92 age ± 2.90, 8 male). One type of tactile stimuli, were applied to middle finger and index finger of the right hand. The electroencephalogram (EEG) was recorded from 64 channels, 3 of which (C<inf>Z</inf>, C<inf>3</inf>, C<inf>4</inf>) were primarily analyzed. Peak-to-peak maximum amplitudes and durations of delta (0.5–3.5 Hz) were measured in 1000 ms following stimuli. For the statistical analysis Wilcoxon test was used. In this present study, increases in delta (0.5–3.5 Hz) responses for non-painful tactile stimuli in blind subjects were compared with the control group. In each electrode area (C<inf>Z</inf>, C<inf>3</inf>, C<inf>4</inf>) the amplitude measurements of the blind group found higher than the control group and the difference found statistically significant in C4 electrode area (p≪0.05).The durations in each electrode area (C<inf>Z</inf>, C<inf>3</inf>, C<inf>4</inf>) for the blind group found statistically longer than the control group ( for each one p≪0.05).","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124277742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic analysis of ß lactamase ligand interaction 内酰胺酶配体相互作用的动态分析

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130306

Pinar Kanlikilicer, Nilay Budeyri, B. S. Akbulut, A. Hortaçsu, Elif Ozkirimli Olmez

{"title":"Dynamic analysis of ß lactamase ligand interaction","authors":"Pinar Kanlikilicer, Nilay Budeyri, B. S. Akbulut, A. Hortaçsu, Elif Ozkirimli Olmez","doi":"10.1109/BIYOMUT.2009.5130306","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130306","url":null,"abstract":"β-lactam antibiotics are the most commonly used antibiotics which cause bacterial cell lysis by inhibiting the enzyme responsible for the cell wall synthesis. Production of β-lactamase enzyme, which catalyzes the hydrolysis of β-lactam ring of β-lactam antibiotics is the most common mechanism of bacterial resistance. β-Lactamase Inhibitory Protein (BLIP), is an effective inhibitor of class A β-lactamases such as TEM-1 and SHV-1. TEM-1 and SHV-1 are the most commonly found β-lactamases and they are responsible for the resistance to β-lactam antibiotics of various pathogenic bacteria. In an effort to elucidate the mechanism of β-lactamase inhibiton by BLIP and to make predictions of binding affinity between these molecules, Molecular Dynamics (MD) simulations were performed on TEM-1 and SHV-1 bound to BLIP and BLIP based peptides. Asp49 residue which is known to play a critical role on binding on BLIP was mutated to Alanine to determine the contribution of this residue to binding. Binding free energy of the TEM-1 and SHV-1 bound BLIP, mutant BLIP (D49A) complexes were estimated by the molecular mechanics Poisson Boltzmann Surface Area method (MM-PBSA). Free energy of binding calculations show that the mutation on D49 causes a decrease in binding affinity for both TEM-1 and SHV-1 β-lactamase.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116867318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of complex wavelet transform with different levels in classification of ECG arrhytmias using complex-valued ANN 不同层次复小波变换在复值神经网络ECG心律失常分类中的作用

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130249

M. Ceylan, Y. Ozbay

引用次数: 1

Alternative hierarchical clustering approach in construction of phylogenetic trees 构建系统发育树的分层聚类方法

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130304

C. Kandemir-Cavas, E. Nasibov

引用次数: 4

The construction of biosensors with amperometric tranducers in biomedical engineering 生物医学工程中带安培传感器的生物传感器的构建

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130266

Ferit Volkan Suer, Dilek Cokeliler, I. Kocum

引用次数: 0

In epimuscularly connected muscle previous activity at high length yields sizable history effects causing decreased muscle force at low lengths 在肌外连接的肌肉中，先前的高长度活动产生相当大的历史效应，导致低长度肌肉力下降

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130297

F. Ates, P. Huijing, C. Yucesoy

{"title":"In epimuscularly connected muscle previous activity at high length yields sizable history effects causing decreased muscle force at low lengths","authors":"F. Ates, P. Huijing, C. Yucesoy","doi":"10.1109/BIYOMUT.2009.5130297","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130297","url":null,"abstract":"History effects are the changes in isometric forces of muscles previously activated at high length. The aim of our study was to investigate determinants of history effects in the context of epimuscular myofascial force transmission. Isometric forces of maximally active extensor digitorum longus (EDL) muscle, as well as tibialis anterior and extensor hallicus longus muscle complex (TA+EHL) of the rat were measured simultaneously. (i) length-force (l-f) data were collected and (ii) control measurements were performed at EDL optimum (higher) length and ii) at reference (lower) length. Between consecutive contractions muscles were allowed to recover for 2 min. History effects were quantified as Fl-f-Fcontrol for the indicated lengths. 4 conditions were studied: (1) in the intact condition, during extensor digitorum longus (EDL) lengthening, at low length of EDL, history effects were 45.49%. However, no significant effects were shown for the forces at high length of EDL and restrained TA+EHL. (2) Second control measurements taken 15 minutes after first ones showed that extra time increased the history effects (i.e. EDL proximal force decrease increased from 41.53% to 55.69%). (3) After simultaneous lengthening of EDL and TA+EHL history effects decreased by 42.12% (4) History effects decreased to %34.92 after blunt dissection and 29.56% after fasciotomy. Our study showed that history effect is a fundamental phenomenon determined by intrinsic muscle properties and epimuscular connections may change this effect.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120831730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Wiener Deconvolution Model in P300 Spelling Paradigm Wiener反卷积模型在P300拼写范式中的应用

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130259

Balkar Erdoğan, N. G. Gencer

{"title":"Application of Wiener Deconvolution Model in P300 Spelling Paradigm","authors":"Balkar Erdoğan, N. G. Gencer","doi":"10.1109/BIYOMUT.2009.5130259","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130259","url":null,"abstract":"Spelling Paradigm first introduced by Farwell and Donchin, is one of the Brain Computer Interface (BCI) applications that enables paralyzed people to communicate with their environment. In such a problem, user needs to focus on the characters which are randomly flashed row or column-wise on the computer screen in a small period of time. The accuracy in spelling words is the main problem in this scheme and the duration of the correct prediction is quite important. The purpose of this work is twofold: to analyze a user specific response to a spelling paradigm system considering the optimal frequency bands for P300 detection, and secondly to investigate the classification performance for the perception of row and columnwise flashings in the spelling system. The preprocessing is performed with Wiener Deconvolution Model (WDM) and optimal filters for user specific system is constructed. The proposed algorithm is applied to dataset IIb of BCI competition 2003 and the words for training and testing sets are predicted with 100% accuracy after first 4 trials, as compared to other winning algorithms (100% accuracy in 5 repetitions) of the competition. Furthermore, our classification results show that perception to row and column flashings may differ considerably.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124377935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Microcontroller based Hodgkin-Huxley model neuron simulation 基于单片机的霍奇金-赫胥黎模型神经元仿真

2009 14th National Biomedical Engineering Meeting Pub Date : 2009-05-20 DOI: 10.1109/BIYOMUT.2009.5130348

Y. Isler, M. Kuntalp, Gokhan Gonel

引用次数: 0