2007 International Symposium on Information Technology Convergence (ISITC 2007)最新文献_第3页

Estimation of Central Blood Pressure Using Radial Pulse Waveform 利用径向脉搏波形估计中心血压

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.46

Ran Wei, J. Im, S. Park

{"title":"Estimation of Central Blood Pressure Using Radial Pulse Waveform","authors":"Ran Wei, J. Im, S. Park","doi":"10.1109/ISITC.2007.46","DOIUrl":"https://doi.org/10.1109/ISITC.2007.46","url":null,"abstract":"Arterial stiffness is an important determinant of cardiovascular risk and, consequently, it is necessary to develop a system which measures the central aortic blood pressure noninvasively. Recently, the aortic augmentation index (AIx), which can be calculated from the estimated aortic waveform based on the radial pressure waveform, has been used as a quantitative index of systemic arterial stiffness. The pressure waveform at various body sites is a composite of the forward and reflected waves and, therefore, the relationship between the aortic pressure and peripheral pressure is not fixed. Consequently, it is necessary to establish an algorithm for obtaining the central aortic pressure waveforms from the radial pressure waveforms. Transfer functions were established using a ICf order ARX model by setting the radial pulse as the input and the aortic pulse as the output, and their stability was verified through residual analysis. The objective of this study was to compare the central blood pressure values estimated from the radial pressure waveform using the ARX model with the central pressure waveforms acquired invasively from patients undergoing angioplasty using a RADI pressure wire. Fifty subjects (35 males and 15 females) participated in the study. The central aortic pressure waveforms obtained using the RADI pressure wire system and the radial arterial pulse waves obtained using a pressure sensor were acquired simultaneously. The results show that there was a linear relationship between the systolic pressure measured by the RADI pressure wire and that estimated using the ARX transfer function (r = 0.848). Also, the pulse pressures measured by the RADI pressure wire were linearly related to those estimated using the ARX transfer function (r = 0.893).","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129852627","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: 12

An Efficient Migration Scheme for Mobile Agents in Ubiquitous Environments 泛在环境下移动代理的有效迁移方案

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.20

Seungsang Sun, Hyun-Su Jang, Youn-Woo Kim, Y. Eom

引用次数: 1

Improved VoIP Design for the Advertisement Service 改进的VoIP广告服务设计

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.57

Se-young Jang, Seung-Sun Yoo, Hoon-Sung Kwak

{"title":"Improved VoIP Design for the Advertisement Service","authors":"Se-young Jang, Seung-Sun Yoo, Hoon-Sung Kwak","doi":"10.1109/ISITC.2007.57","DOIUrl":"https://doi.org/10.1109/ISITC.2007.57","url":null,"abstract":"VoIP (Voice over IP), so called Internet phone, provides several unique advantages, for instance, inexpensive long distance call service than the existing wire telephone network and various multimedia services from Internet network added to voice call service. The paper is intended to describe the results of the VoIP system designed and realized by using SIP, which was suggested to create, modify and end multimedia sessions. The VoIP system was developed as an Ads-receiving VoIP terminal, which may receive and save multimedia advertisement and the advertisement service model was suggested. The VoIP phone may save the advertisements received from a PUSH server of common carriers in its internal storage while it saves only the information necessary for a user and delivers it promptly at any time. Regarding the performance of the Ads-receiving VoIP phone, its processing time per kernel instruction, which is the time elapsed to form a packet and transmit it, was 18 ms. As a result of running the software, the receiver only accounted for 4 ms of the software processing time and connecting and disconnecting an outbound call took 93 ms, suggesting the result of 10 ~ 12 calls processed per second.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134114995","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

New Range and k-NN Query Processing Algorithms Using Materialization Technique on Spatial Network 基于空间网络物化技术的范围和k-NN查询处理新算法

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.69

Jung-Ho Um, N. K. Chowdhury, Jae-Woo Chang

引用次数: 7

Effects of Time and Frequency Resolution on Nonnegative Matrix Factorization 时间和频率分辨率对非负矩阵分解的影响

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.43

S. Sophea, S. Phon-Amnuaisuk

引用次数: 0

Korean Manual Alphabet (KMA) Recognition System Using USB Camera 使用USB摄像头的韩文手写字母识别系统

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.64

Young-Joon Oh, Kwang-Hyun Park, Z. Bien

引用次数: 15

A Collaborative Software Tool for the Evaluation of MRI Brain Segmentation Methods 一种评估MRI脑分割方法的协同软件工具

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.5

V. Barra, A. Lundervold

引用次数: 1

Research on LXI Bus Based on Wireless Technology 基于无线技术的LXI总线研究

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.77

Q. Honglei, Q. Changquan, Xin Lingfei

引用次数: 3

A Study on Antecedent Decision Rules for Natural Language Requirements Document in Korean 朝鲜语自然语言需求文档的先行词决策规则研究

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.18

K. Park, Moon-kun Lee, Dongun An, Yong-Seok Lee

引用次数: 1

Manufacturing Test Data Analysis-On Comparing Different Classification Algorithms 制造试验数据分析——不同分类算法的比较

2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.65

Jia Keat Lee, S. Phon-Amnuaisuk, Huat Chin Chew, C. Ho

引用次数: 0