• International Journal of Computer Science & Network Security
• /
• 제23권11호
• /
• pp.183-189
• /
• 2023

A stroke is a medical disease where a blood vessel in the brain ruptures, causes damage to the brain. If the flow of blood and different nutrients to the brain is intermittent, symptoms may occur. Stroke is other reason for loss of life and widespread disorder. The prevalence of stroke is high in growing countries, with ischemic stroke being the high usual category. Many of the forewarning signs of stroke can be recognized the seriousness of a stroke can be reduced. Most of the earlier stroke detections and prediction models uses image examination tools like CT (Computed Tomography) scan or MRI (Magnetic Resonance Imaging) which are costly and difficult to use for actual-time recognition. Machine learning (ML) is a part of artificial intelligence (AI) that makes software applications to gain the exact accuracy to predict the end results not having to be directly involved to get the work done. In recent times ML algorithms have gained lot of attention due to their accurate results in medical fields. Hence in this work, Stroke disease identification system by using Machine Learning algorithm is presented. The ML algorithm used in this work is Artificial Neural Network (ANN). The result analysis of presented ML algorithm is compared with different ML algorithms. The performance of the presented approach is compared to find the better algorithm for stroke identification.

• 대한의용생체공학회:의공학회지
• /
• 제36권5호
• /
• pp.198-203
• /
• 2015

The purpose of the study is to examine the effects of pacemaker location on cardiac pumping efficacy theoretically. We used a three-dimensional finite element cardiac electromechanical model of canine ventricles with models of the circulatory system. Electrical activation time for normal sinus rhythm and artificial pacing in apex, left ventricular free wall, and right ventricular free wall were obtained from electrophysiological model. We applied the electrical activation time maps to the mechanical contraction model and obtained cardiac mechanical responses such as myocardial contractile ATP consumption, stroke work, stroke volume, ejection fraction, and etc. Among three artificial pacing methods, left ventricle pacing showed best performance in ventricular pumping efficacy.

• 한국전문물리치료학회지
• /
• 제2권2호
• /
• pp.98-107
• /
• 1995

Physical therapists use assumptions about motor control in every aspect of their work in treating stroke patients. An understanding of the recovery process after stroke, some neural mechanism of recovery and therapeutic model is critical factor for physical therapist to evaluate and obtain a higher final stage of recovery. The purpose of this article was to review the recovery process after stroke, some neural mechanism of recovery, the role of rehabilitation in the process of recovery, therapeutic model and its limitation. This article will help understanding of recovery process. evaluation, and treatment of the stroke patients. Each therapeutic method consists of a different set of assumptions and they are not completely independent of one another. Therefore specializing in any techniques of physical therapy will not be enough to treat stroke, so we are in need of integrated approach and objective measurement instrument to adequately evaluate and treat stroke patients.

• International Journal of Automotive Technology
• /
• 제8권4호
• /
• pp.403-411
• /
• 2007

This article describes a methodology based on experiments and 1D modeling work related to the exhaust system analysis of a small two-stroke engine. The primary goal of this work was to understand how the design criteria of a compact exhaust system influenced the exhaust port pressure, since its evolution controls not only engine performance but also exhaust emissions. On the experimental side, a fully instrumented 50cc two-stroke engine was used to check the behavior of three different exhaust systems. A problem related to instantaneous pressure measurements in unsteady, hot flow was detected and solved during the study. To build the 1D model of the three exhaust systems, experimental information on the steady flow and the impulse test rigs was obtained under controlled conditions in specific facilities. Accurate comparisons between measured and calculated exhaust port instantaneous pressures were obtained from the following different exhaust system configurations: a straight duct, a tapered pipe and the three compact exhaust systems. The last step in the method used this model to analyze the pressure waves inside the exhaust system and detect the influence of the geometric parameters. The results should lead to improvements in the design process of complex compact exhaust systems in two-stroke engines.

• 한국전산구조공학회:학술대회논문집
• /
• 한국전산구조공학회 2001년도 봄 학술발표회 논문집
• /
• pp.375-382
• /
• 2001

This paper deals with the compensation method of AMD stroke by adopting variable gain feedback control strategy. The gains, generally known to be constant, are designed to have variable values according to the structural responses and the AMD stroke. This strategy has the advantage of compensating AMD stroke under any kind of loadings, on the other hand the conventional strategies work only under the specific loading. The strategy shows that the AMD stroke is compensated to prevent the stroke saturation and the control force is found not affected by the compensating operation while the control force is reduced and the control efficiency is decreased during the compensating operation in the conventional strategies.

• Journal of Dental Anesthesia and Pain Medicine
• /
• 제22권1호
• /
• pp.11-18
• /
• 2022

Background: The vasoconstrictive effect of epinephrine in local anesthetics affects the heart, which leads to hesitation among dentists in injecting local anesthetics into patients with cardiovascular disease. Due to its vasoconstrictive effects, the present study investigated the effects of vasopressin administration on cardiac function in rats. Methods: Experiment 1 aimed to determine the vasopressin concentration that could affect cardiac function. An arterial catheter was inserted into the male Wistar rats. Next, 0.03, 0.3, and 3.0 U/mL arginine vasopressin (AVP) (0.03V, 0.3V, and 3.0V) was injected into the tongue, and the blood pressure was measured. The control group received normal saline only. In Experiment 2, following anesthesia infiltration, a pressure-volume catheter was placed in the left ventricle. Baseline values of end-systolic elastance, end-diastolic volume, end-systolic pressure, stroke work, stroke volume, and end-systolic elastance were recorded. Next, normal saline and 3.0V AVP were injected into the tongue to measure their effect on hemodynamic and cardiac function. Results: After 3.0V administration, systolic blood pressures at 10 and 15 min were higher than those of the control group; they increased at 10 min compared with those at baseline. The diastolic blood pressures at 5-15 min were higher than those of the control group; they increased at 5 and 10 min compared with those at baseline. The preload decreased at 5 and 10 min compared to that at baseline. However, the afterload increased from 5 to 15 min compared with that of the control group; it increased at 10 min compared with that at baseline. Stroke volume decreased at 10 and 15 min compared with that of the control group; it decreased from 5 to 15 min compared with that at baseline. Stroke work decreased from 5 to 15 min compared with that of the control group; it decreased from 5 to 15 min compared with that at baseline. Conclusion: Our results showed that 3.0 U/mL concentration of vasopressin resulted in increased blood pressure, decreased stroke volume and stoke work, decreased preload and increased afterload, without any effect on myocardial contractility.

• 대한한의학회지
• /
• 제28권1호통권69호
• /
• pp.35-41
• /
• 2007

Objectives : To gain better insights on the characteristics of stroke patients admitted to oriental medical hospitals, we analyzed the data of 363 consecutive patients with acute ischemic stroke from Hanbang Stroke Registry supported by the Ministry of Science and Technology of Korea. Methods : Subjects' enrollment was in the oriental medical hospitals of 3 universities located in the metropolitan region from October 2005 to October 2006. We assessed the subjects' general characteristics, risk factors, and etiology of stroke. Each patient's TOAST classification type was confirmed by two independent specialists. Those were small vessel occlusion (SVO), large artery atherosclerosis (LAA), cardioembolism (CE), stroke with other determined etiology (SOE), and stroke with undetermined etiology (SUE).Results 'The distribution of the subjects' general characteristics and risk factors for stroke were similar with result storm previous reports. However, in the TOAST classification, SVO was the major type occupying 78.5% in the total subjects, which is the highest share compared with other research with similar methods. These results imply that patients with more severe symptoms rarely visit oriental medical hospitals. Conclusion : Assuming that this research will continue adding patient's data continuously, this work will help us to understand the features of stroke patients at oriental medical hospitals, and contribute to expansion of the Korean Hanbang Stroke Data Bank.

• 한국노년학
• /
• 제30권4호
• /
• pp.1239-1261
• /
• 2010

본 연구는 장기간 노인(전문)병원 및 요양시설에서 생활하고 있는 뇌졸중 생존 노인들의 건강관련 삶의 질에 미치는 요인들이 무엇인지 규명함으로써 대상자들의 삶의 질 증진을 위한 사회복지 실천 방안들을 제언하고자 시행되었다. 연구 대상자는 충청지역 및 D 광역시 소재 노인(전문)병원 18곳과 요양시설 13곳에서 장기 입원(입소)하고 있는 55세 이상의 뇌졸중 생존 노인들이며 서베이 방법을 사용하여 직접면담조사를 실시하였다. 조사는 2008년 12월 16일부터 2009년 1월 17일까지 실시되었고, 총 328부의 설문지가 통계분석에 이용되었다. 연구결과 대상자들이 인지하고 있는 건강관련 삶의 질은 비교적 낮게 나타났고, 특히 건강관련 삶의 질을 구성하고 있는 하위 영역 중 사회적 관계 영역이 가장 낮게 나타났다. 투입된 독립변수들이 건강관련 삶의 질에 미치는 상대적 영향력은 '우울', '향후 경제적 부담감', '일상생활수행능력', '장애수용', '중복질환', '경제적 주부양자가 배우자인 경우'순으로 나타났다. 본 연구를 통해 장기재활 및 요양서비스를 이용하고 있는 뇌졸중 생존 노인들의 건강관련 삶의 질에 질병관련 요인뿐만 아니라 심리사회적 요인, 환경적 요인 모두 중요한 영향을 미치고 있다는 것이 규명되었고, 그 가운데서도 심리사회적 요인의 영향력이 제일 큰 것으로 밝혀졌다. 이를 바탕으로 노인의료복지시설에서 생활하고 있는 뇌졸중 생존 노인들의 삶의 질을 향상시키고 더 나아가 사회복지사들의 역량을 고취시킬 수 있는 사회복지 방안들이 논의되었다.

• 한국자동차공학회논문집
• /
• 제9권3호
• /
• pp.1-8
• /
• 2001

The flow field inside a cylinder of four-valve Sl engine was investigated quantitatively using a three-dimensional Laser Doppler Velocimetry system, to determine how stroke changes affect the flow field. The purpose of this work was to develop quantitative methods which correlate in-cylinder flows to engine performance. For this study, the sane intake manifold, engine head, cylinder, and the piston were used to examine the flow characteristics in different strokes. Quantification of the flow field was done by calculating three major parameters which are believed to adequately characterize in cylinder motion. These quantities were TKE, tumble and swirl ratios. The LDV results reveal that flow patterns are similar, the flow velocities scale with piston speed but another parameters such as TKE, and tumble and swirl numbers are not the same for different stroke systems.

• 한국산학기술학회논문지
• /
• 제18권6호
• /
• pp.165-170
• /
• 2017

본 연구는 뇌졸중 발병 후 지역사회 참여에 영향을 미치는 요인들을 알아봄으로서 지역사회 중심 재활에 중요한 자료를 제공하는 것을 그 목적으로 하였다. 연구 대상은 발병 기간이 6개월 이상인 뇌졸중 환자 100명이었다. 대상자의 사회 참여 정도를 파악하기 위해 한국판 크레이그 장애 평가(Craig Handicap Assessment and Reporting Technique: K-CHART)를 실시하였고, 일상생활활동의 독립 수준을 알아보기 위해 한국판 수정 바델 지수(Korean-Modified Barthel Index: K-MBI) 검사를 통해 대상자의 지역 사회 참여에 영향을 미치는 요인을 알아보았다. 결과, 뇌졸중 환자의 지역 사회 참여의 관련요인은 다음과 같이 나타났다. 일상생활활동, 연령, 고용의 유무보다는 뇌졸중 환자의 신체적 독립, 인지적 독립, 이동성, 작업, 사회 통합이 참여에 높은 설명력을 나타났다. 또한 신체적 독립, 인지적 독립, 이동성, 작업, 사회 통합이 참여에 영향을 미치는 요인들로 나타났다. 모든 항목에서 통계적으로 유의한 수준이었다(p<.01). 뇌졸중 환자의 사회참여를 증진하기 위한 작업치료의 초점에 대한 정보를 제공하며, 참여에 영향을 미치는 요인들에 대하여 적절한 평가와 중재가 참여를 증진하기 위해 필수적인 재활이 될 것이라 사료된다.