가상주행시험을 위한 차량 운전자 모델 개발

이홍기,전형호,탁태오 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

In this study, a driver model based on the lead-lag controller for stable maneuver of a highly nonlinear, multi-dimensional, numerically stiff multibody vehicle model according to the various handling test requirements such as steady-state cornering, double lange change, etc. is presented The lead-lag controller is developed with lead and lag compensation. Which use the transfer function with cross-over frequency by frequency response method. The proposed driver model is applied to a vehicle model in steady-state and slalom maneuver to verify its effectiveness and validity. The results show that the proposed path control strategy is excellent both in pursuing the desired course and stability of the vehicle.

공공부조 수급자의 생활실태와 소득활동에 관한 연구 : 광주광역시 서구 영구임대주택 거주 국민기초 생활보장 수급자를 중심으로

조원탁,이형하,윤종성 한국사회복지정책학회 2004 사회복지정책 Vol.19 No.-

본 연구에서는 소득활동에 참여하는 국민기초생활보장제도 수급자의 일과 생활에서 나타나는 급여수 행태와 욕구를 확인하고 소득획득금액이라는 변수를 활용하여 욕구별 차이를 살펴보았다. 먼저 일하는 수급자의 일반적 특성을 사회복지전담공무원이 활용하는 보건복지종합행정시스템의 자료를 활용하여 기초통계 분석을 실시하였으며 다음으로 가족특성과 근로형태를 고려하여 선정된 44사례에 대해 귀납적 방법으로 욕구 분석을 하였다. 또한 욕구별 소득획득금액의 차이를 복지급여액과 기타 지원내용을 현금화한 자료와 빈곤을 구성하는 지수를 통해 분석하였다. 분석결과를 요약하면 첫째, 일하는 수급자의 특성에서 여성가구주는 자녀교육과 양육에 대한 부담이 크고 남성가구주는 질병과 장애가 있는 가구원 보호에 대한 부담이 큰 것으로 나타났다. 20대에서는 양육과 보호에 대한 욕구, 30~40대에서는 교육비지원에 대한 욕구, 50대에서는 일자리 유지와 질병에 대한 욕구가 강한 것으로 나타났다. 둘째, 일하는 수급자의 생활에서 파악된 급여 수급형태는 일반 장기관에 신고되지 않는 소득활동에 참여하는 형식으로 나타났다. 주된 욕구문제는 질병문제 교육비 부담, 가사부담, 아동보육, 불안정한 소득기반, 빈곤생활의 지속, 부채 등으로 나타났다. 셋째, 복지급여액과 기타 지원내용을 현금화한 소득획득금액을 산출을 통한 분석 결과 일하는 수급자들은 국가가 정한 최저생계비 대비 130%의 수입효과를 얻는 것으로 나타났다. 따라서 향후 차상위계층의 소득획득금액의 분석을 통해 비교연구를 하는 것이 필요하다. This study intends to examine the behaviours within daily lives of recipients of national basic livelihood protection, who participate in economic activities, and get the bottom of the efficiency of their needs. First, I conducted fundamental statistics analysis on general data of working recipients by using materials from health and welfare general administration system, which is used by governmental employees in social welfare department. Then I selected 44 cases considering their family career and type of business they are engaged in, and conducted analysis on their needs inductively. In addition, I conducted this analysis by converting welfare allowance and other support into money to determine the result of behaviours for their needs. The result can be summarized as follows. First, it is found out that female householders worry about the educational expenditure of their children and the cost of bringing up their children the most and that male householders family members who suffer from illnesses or disorders the most. It is shown that the recipients in their 20s are interested in the bringing up and protection of their children, in their 30s to 40s meeting the educational expenditure of their children, and in their 50s keeping being employed and maintaining their health. Second, they avoid getting usual jobs, prefer self-support jobs provided by the government to usual ones and work close to their home, and mostly participate in economic activities, which are not registered in social security institutes, as I examined their strategies by conducting intensive interview on their life and job. They mostly worry about their health, educational expenditure, household duties, bringing up their children, unstable income, continuation of poverty and debt. Third, they earn 130% of minimum cost of living, which is determined by the government, according to the analysis on their needs and efficiency. Especially, the efficiency was found high in cases where recipients seem to worry about education, protection of their children and debt. This study has significance as it intends to examine the recipients who live in permanent rental apartments and evaluate their needs and efficiency of the allowance in a situation where their residential space and health care are insured. Second, this study proved the adequacy of implementing separate allowance system in areas such as residence, health care and education, by clarifying strategies by needs and conducting analysis on efficiency.

대학운동선수들의 일상 의식과 태도에 대한 질적 분석

윤여탁,이형일 연세대학교 체육연구소 2002 체육연구논문집 Vol.9 No.1

본 연구의 목적은 대학교에 재학중인 운동선수들의 일상활동인 학습과 운동훈련 속에서 선수개인이 느끼는 의식과 태도를 분석함으로써, 지도자들에게 운동선수들의 학업관리와 훈련지도에 기초자료를 제공하기 위한 것이다. 또한 선수 개인들에게도 반성을 통한 삶의 과정을 자각케 함으로써 대학생활 기간 중 자아정체성 확립에 도움을 주는 데 있다. 이 같은 연구목적을 수행하기 위하여 본 연구에서는 대학운동선수들이 직접 경험한 사실들을 후기 실증주의적 방법론을 사용하여 분석하였다. 이 분석 방법은 운동선수 자신들의 관점으로부터 개인의 삶의 형태와 사회, 그리고 대학교육을 인식하는 방식을 분석 가능케 한다. 운동선수들의 일산의식에 대한 연구는 선수개인이 자신의 역할을 어떻게 내면화하고 자신에게 주어지는 의무를 어떻게 해석하느냐를 분석하는 것이다. 다시 말해, 운동선수의 주관적 경험에 대한 해석을 현상학적으로 밝혀내는 작업이다. 이러한 관점에서, 선수 개인들이 자신의 경험을 스스로 구성하는 심층 면접법이 적합하다고 보며, 이를 통해, 선수들이 바라보는 사회와 교육의 전반적 현상을 구체적으로 범주화시킬 수 있었다. 논의의 결과 대학운동선수들의 일상의식과 태도에 대한 범주화로 훈련에 대한 부담과 집착, 진로에 대한 기대, 통제에 대한 순응, 학사관리의 부담, 인간적인 소외감 등의 하위영역으로 분류되었다. 대학 운동선수들은 학교생활 속에서 과도한 운동연습으로 인한 학습할 권리의 침해와 다른 학생들과의 교류 부족으로 인한 정체성에 갈등을 느끼고 있었다. 그러나, 자신의 진로를 위해 개인운동능력 향상을 목적으로 개인훈련을 꾸준히 하고 있었다. 또한, 운동과 학습의 병행에 따라 개인의 인간적 삶을 제약받고 있고, 통제된 환경에 대해서는 운동선수를 스스로 선택한 만큼 자율적 문제로 인정하며, 수업관리에는 큰 고충을 느끼고 있었다. The purpose of this study was to investigate elite student-athletes recognize self-identity and self-awareness, provide an university of the athletes' policy for university manager and coaches being responsibility of athletes' training and management with the voice of athletes directly. Data collection included mainly in-depth interviews and participation observation. This study explored the development of such critical using elite student-athletes as the experiential base. I argue that they must be conceived of as a unity in understanding the social construction of elite student-athletes, as well as in developing and embodying critical perspectives. The results were divided into five categorization which were attachment on practice, expectation on the job, docility on control, hardness on the participation of classes, and ailenation, they were life-consciousness and attitude of elite student-athletes in university.

The relationship between visit-to-visit variability in blood pressure and incidence of metabolic syndrome: a general population-based cohort study in Korea

Hyung Tak Lee,June Namgung,Young-Hyo Lim,박환철,Jin-Kyu Park,신진호 대한고혈압학회 2019 Clinical Hypertension Vol.25 No.3

Background: Previous studies demonstrated that visit-to-visit variability of blood pressure (BP) has significant relationship with cardiovascular disease. Visit-to-visit variability in BP might have prognostic value for cardiovascular disease. The aim of this study is to evaluate the effect of visit-to-visit variability in BP on development of metabolic syndrome in general population without cardiovascular disease, diabetes mellitus, metabolic syndrome, and BP medication. Method: We used data from the Korean Genome Epidemiology Study conducted by the Korean Centers for Disease Control and Prevention. All cohorts who were followed first 3 periods formed the basis of the study sample, which consisted of 7195 people. Of these samples, 3431 subjects who had cardiovascular disease, diabetes mellitus, or metabolic syndrome were excluded, and 312 subjects who were using antihypertensive medication in first 3 periods were excluded. Our final study sample consisted of 3452 cohorts. Results: The mean age was 53.5 (8.25) years. The proportion of male was 50.2%. Average follow-up duration was 5.91 (0.17) years. In generalized estimating equation, the development of metabolic syndrome was associated with mean systolic BP (SBP) (Odd ratio (OR) 1.042, 95% confidence interval (CI) 1.035–1.048, p < 0.001), mean diastolic BP (DBP) (OR 1.058, 95% CI 1.049–1.069, p < 0.001), standard deviation (SD) of SBP (OR 1.036, 95% CI 1.017–1.055, p < 0.001), SD of DBP (OR 1.053, 95% CI 1.027–1.080, p < 0.001), and coefficient of variation (CV) of DBP (OR 1.025, 95% CI 1.005–1.046, p = 0.016) after adjusted for age, sex, and metabolic syndrome component. When mean SBP, mean DBP, SBP variability, and DBP variability were entered all together in the analysis model, SD of DBP (OR 1.033, 95% CI 1.003–1.063, p = 0.030) and CV of DBP (OR 1.027, 95% CI 1.004–1.051, p = 0.020) were significantly associated with the development of metabolic syndrome. Conclusion: In general population without cardiovascular disease, diabetes mellitus, metabolic syndrome, and BP medication, SD of DBP and CV of DBP was associated with the development of metabolic syndrome. Visitto-visit variability in DBP might be helpful for the prediction of future metabolic syndrome development.

T-cell-restricted intracellular antigen 1 facilitates mitochondrial fragmentation by enhancing the expression of mitochondrial fission factor

Tak, Hyosun,Eun, Jung Woo,Kim, Jihye,Park, So Jung,Kim, Chongtae,Ji, Eunbyul,Lee, Heejin,Kang, Hoin,Cho, Dong-Hyung,Lee, Kyungbun,Kim, Wook,Nam, Suk Woo,Lee, Eun Kyung Macmillan Publishers Limited, part of Springer Nat 2017 Cell death and differentiation Vol.24 No.1

<P>Mitochondrial morphology is dynamically regulated by the formation of small fragmented units or interconnected mitochondrial networks, and this dynamic morphological change is a pivotal process in normal mitochondrial function. In the present study, we identified a novel regulator responsible for the regulation of mitochondrial dynamics. An assay using CHANG liver cells stably expressing mitochondrial-targeted yellow fluorescent protein (mtYFP) and a group of siRNAs revealed that T-cell intracellular antigen protein-1 (TIA-1) affects mitochondrial morphology by enhancing mitochondrial fission. The function of TIA-1 in mitochondrial dynamics was investigated through various biological approaches and expression analysis in human specimen. Downregulation of TIA-1-enhanced mitochondrial elongation, whereas ectopic expression of TIA-1 resulted in mitochondria fragmentation. In addition, TIA-1 increased mitochondrial activity, including the rate of ATP synthesis and oxygen consumption. Further, we identified mitochondrial fission factor (MFF) as a direct target of TIA-1, and showed that TIA-1 promotes mitochondrial fragmentation by enhancing MFF translation. TIA-1 null cells had a decreased level of MFF and less mitochondrial Drp1, a critical factor for mitochondrial fragmentation, thereby enhancing mitochondrial elongation. Taken together, our results indicate that TIA-1 is a novel factor that facilitates mitochondrial dynamics by enhancing MFF expression and contributes to mitochondrial dysfunction.</P>

Range Migration Compensation in a Stepped-Frequency Radar

Hyung Young Tak,Jeon Min,Hyung Kun Park,Jeong Soo Lee,Young Soo Kim 대한전자공학회 1995 대한전자공학회 학술대회 Vol.1995 No.11

Articles : Analysis and Operation of Cooling Water Flows in a Heat Exchangers Network

( Hyung Tak Lee ),( Bom Sock Lee ),( In Beum Lee ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.4

In general, the flow rates of cooling water flowing in a heat exchangers network should be measured for its operational purpose. However, it is difficult to install flow meters on every spot because of the financial and technical reasons. This work presents an explicit algorithm for determining the flow rates of cooling water flowing in the heat exchangers network in the chemical plant. An algorithm is also presented to obtain the desired flow rates of cooling water in each heat exchanger. In order to solve this problem, multivariable optimization techniques will be used to minimize the differences between the desired flow rates and the present cooling water flow rates which flows through the heat exchanger. The commercial computer program GAMS/MINOS which solves the nonlinear optimization problem is used. Numerical examples are presented to illustrate the scope of this work which can be handled with the formulation.

Thermoresponsive Phase Transitions of PLA-block-PEO-block-PLA Triblock Stereo-Copolymers in Aqueous Solution

Hyung Tak Lee,Doo Sung Lee 한국고분자학회 2002 Macromolecular Research Vol.10 No.6

Altered Eye-Movement Patterns During Text Reading in Obsessive–Compulsive Disorder and Internet Gaming Disorder

Lee, Tak Hyung,Kim, Minah,Kwak, Yoo Bin,Hwang, Wu Jeong,Kim, Taekwan,Choi, Jung-Seok,Kwon, Jun Soo Frontiers Media S.A. 2018 Frontiers in Behavioral Neuroscience Vol.12 No.-

<P>Obsessive-compulsive disorder (OCD) and internet gaming disorder (IGD), which are similar in that both involve repetitive behaviors and related with cognitive dysfunctions, frequently begin in early adolescence, which is a critical period for learning. Although the deterioration in cognitive functioning caused by these conditions may have adverse effects on information processing, such as text reading, there has been no comprehensive research on the objective indicators of altered reading patterns in these patients. Therefore, we evaluated eye-movement patterns during text reading in patients with OCD or IGD. In total, 20 patients with OCD, 28 patients with IGD and 24 healthy controls (HCs) participated in the reading task using an eye tracker. We compared the fixation durations (FDs), saccade amplitudes and eye-movement regressions of the three groups during reading. We explored relationships between the parameters reflecting altered reading patterns and those reflecting the severity of clinical symptoms. The average FDs and forward saccade amplitudes did not differ significantly among the groups. There were more eye-movement regressions in patients with OCD than in patients with IGD and HCs. No correlation was found between altered eye-movement patterns during reading and the severity of clinical symptoms in any of the patient groups. The significantly increased number of regressions (NRs) in the OCD group during reading may reflect these patients’ difficulties with inferential information processing, whereas the reading pattern in the IGD group is relatively intact. These findings suggest that patients with OCD and patients with IGD have different eye-movement patterns during reading reflecting distinct cognitive impairments in the two patient groups.</P>

Thermoresponsive Phase Transitions of PLA-block-PEO-block-PLA Triblock Stereo-Copolymers in Aqueous Solution

Lee, Hyung-Tak,Lee, Doo-Sung The Polymer Society of Korea 2002 Macromolecular Research Vol.10 No.6

A series of PLA-PEO-PLA triblock stereo-copolymers with varying PLA/PEO and L-DL-LA ratios were synthesized via ring opening pelymerizations. Aqueous solutions of these copolymers undergo thermo-responsive phase transitions as the temperature monotonically increases. Further study shows that there is a critical gel concentration (CGC), and also lower and upper critical gel temperatures (CGTs), at which the thermo-responsive phase transition occurs. The CGC and CGTs are affected by various factors such as block length, as well as the compositions of the PLA blocks and of the additives. In particular, the changes in the phase diagram produced by varying the L-/DL-LA ratio in the PLA blocks were determined to be mainly due to consequent stereo-regularity changes in the PLA blocks.