일정축력 및 반복 횡하중을 받는 철골철근콘크리트 기둥의 내력과 변형성능

정수영,연길환,임경택,윤석천,한병찬 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2

An experimental investigation was conducted to investigate the strength and deformation capacity of Wide Flange Steel Encased Reinforced Concrete(SRC) Columns subjected to constant axial compression and cyclic lateral loading conditions. Six one-third scale specimens were tested, each consisting of a structural steel size encased in reinforced concrete. The parameters studied in the test program included the effects of B/t ratios of encased steel(=13, 18, 23), ratios of axial force(=1/3, 1/6). As a result, capacity prediction based on superimposing the moment-axial-load interaction surfaces of the steel shape and reinforced concrete produced good results; the average of the experimental-to-predicted capacity ratio being equal to 0.99∼1.20. The observed hysteretic behavior of the test specimens indicated that adequated ductility can be achieved and the concrete core must be inhibited to buckling of wide flange.

고호모시스테인증과 동반된 소뇌출혈 1예

홍석찬,안재영,조수진,정진상,이광호,홍승철,변홍식 대한신경과학회 1999 대한신경과학회지 Vol.17 No.3

두개저부 골절에 대한 임상적 분석

장수찬,박철완,한기수,이상구,김영보,이언,정환영 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.5

청각장애자 운동지도를 위한 프로그램 고찰

김정수,박정래,노일환,원충희,김흥식,강신일,박찬홍,김달영,이철원,이찬규 公州大學校스포츠科學硏究所 1987 스포츠科學硏究所論文集 Vol.- No.1

Hearing impairement in varying degrees constitutes one of the most common disabilites affecting school aged children. Eight out of every 1,000 students under the age of twenty have significant hearing loss. Hearing disabilities range from slight to total loss of sound perception. Statistics indicate that only one out of every ten hearing impaired children will become deaf. Most motor activities can be included students may possess low levels of static and/ or dynamic balance, but the greatest majority possess normal motor and physical capabilities. All the hearing impaired youngsters should be properly assessed and given the identical testing batteries as normal children. Hearing impaired students have, essentialy, a communication handicap and suffer from inability to understand verbal instructions. All physical educators should be able to use minimal finger spelling and signing for hearing impaired students.

강관구속된 철근콘크리트 기둥의 변형성능에 관한 실험연구

한병찬,임경택,정수영 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

A new method to prevent reinforced concrete columns from brittle failure. The method is called transversely reinforcing method in which only the critical regions are confined in steel tube. The steel tube can change the failure mode of the latter columns from the shear to the flexure. The steel tube also increase the compressive strength, shear strength and deformation capacity of the in-filled concrete. This paper described results of an investigation conducted to study the ductility of high-strength RC rectangular short columns subjected to constant axial and reversed cyclic lateral load. The variables in the test program were the amount of lateral steel, and shear span to depth ratio.

HSC 기둥의 내진성능에 대한 횡보강근의 효과

한병찬,황선경,성수용,정수영 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

In seismic-resistant design of buildings of ductile frame, the possibility of formation of plastic hinge at column end demands sufficient member ductility. The paper summarizes results of an experimental study of reinforced concrete columns with high-strength materials and subjected to simulated seismic loadings. The experimental program consisted of 6, approximately one-third-scale, rectilinearly confined, high-strength reinforced concrete columns with concrete compressive strengths of approximately 700kgf/cm2. The primary variables of the testing program were the volumetric ratio, spacing, and configuration of transverse reinforcement. Experimental results indicate as follows : 1.There is no expectation of improved effectiveness of deformability by the types of transverse reinforcement when using high yielding strength transverse reinforcement. 2.When using high yielding strength transverse reinforcement, it is possible to widen the spacing that are designed based on seismic provision of ACI 318-89 and get an appropriate deformability as well. 3.The significant parameter to determine the deformability is the spacing of transverse reinforcement in the HSC columns.

호남 서해안지방과 영동지방의 강설 특성에 관한 비교 연구

柳贊洙,鄭炳玉 조선대학교 기초과학연구소 1996 自然科學硏究 Vol.19 No.1

This paper aims to describe the characteristics of snowfall between Youngdong region and west seaside district at Honam region in Korea. Snowfall datas for Gojin, Kangnung and Samchok where located in Youngdong region and Kwangju, Kunsan and Magilsan adjacent to Sosan where located in west seaside district at Honam region. For this study, it was investigated secular variation of snowy days and snowfall, the monthly occurrence frequency of snowy days and snowfall, and pressure pattern governing snowfall at two regions. Especially, for the cases study of heavy snowfall day, it was investigated mixing ratio field by using the upper air data, which composed of 33 stations and nephanalysis by using GMS picture data. The results were summarized as follows ; 1) Annual mean occurrence frequency of snowy days were about 32.1days in west seaside district at Honam region and 20.0days in Youngdong region, respectively. The order of monthly occurrence frequency of snowy days and snowfall were Jan., Dec., Feb. and Mar. in west seaside district at Honam region, and Feb., Mar., Jan. Dec., in Youngdong region, respectively. The secular variation(1980-1990) of snowy days and snowfall showed increasing trend. 2) The pressure patterns governing snowfall in Honam region were classified broadly into three types ; 1. cP dominant type, 2. Through or Low dominant type 3. Cut-off High type. The pressure pattern which had the most occurrence frequency of snowy days and snowfall was cP dominant type. And the pressure patterns governing snowfall in Youngdong region were classified broadly into two types ; 1. cP dominant type, 2. NE air flow type. The pressure pattern which had the most occurrence frequency of snowy days was NE air flow type, which the most snowfall was cP dominat type. 3) On the heavy snowfall day, the moisture layer existed below 850hPa in west seaside district at Honam region and below 700hPa in Youngdong region, respectively. 4) In the mixing ratio field on the heavy snowfall day, the moisture tongue existed at both SFC and 850hPa level in case of heavy snowy day of Youngdong region and the meridional gradient of mixing ratio at SFC at South region in west seaside district at Honam region.

한국인 모발과 내부장기조직간 Cd, Hg, Pb 및 Zn함량의 상호관련성

유영찬,이상기,양자열,김기욱,이수연,정규혁 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.1

In order to study the relationships between trace element concentrations of hair and internal organs, autopsy samples of hair, liver, kidney cortex, kidney medulla, heart, lung, spleen, cerebrum, testis and bone from 162 Korean subjects were analyzed for Cd, Hg, Pb and Zn by inductively coupled plasma atomic emission spectrometry. High significant positive correlations were found between the Cd concentration in hair and bone and Pb in hair and lung. Hair Hg levels were highly significantly correlated with organ Hg levels in the liver, kidney cortex, kidney medulla, heart, lung, spleen, cerebrum, testis and bone. And hair Zn levels were highly significantly correlated with organ Zn levels in the kidney cortex, kidney medulla, spleen, testis and bone.

住民의 價値觀과 政策受容度에 關한 硏究

金秉燦,金學守,李相魯,鄭正佶,金元主 경북대학교 교육대학원 1973 논문집 Vol.4 No.-

1. Introduction Governmental policies should receive strong support from the general public to be effectively implemented. Therefore to find some clue as to how public policies might receive nation-wide support is very important. As the research objective was to find some factors which effect degree of policy acceptability, we interviewed 1,179 persons(633 citizens of Tae-gu city and 546 persons from rural communities in Kyung-puk Province) from July 10 to August 20, 1973, by stratified sampling. Stratifying criteria were sex, age, financial assets and educational background. X^2 was used as a tool to test the hypotheses that there may be differences in values and degree of policy acceptance among persons of different strata and that there may be differences in degree of policy acceptance among persons who have different values. 2. General Tendency Forty percent of those interviewed choose the item "None" among the choices to the following question; Question; Which one do you choose, if you can choose only one of three? Answer; 1) Money or wealth 2) Power 3) Honour 4) None Let us call the persons who choose 1) "Money-oriented" and so "Power-oriented", "Honour-oriented". More persons interviewed preferred a self-restraining life to a hedonistic life, and egoistic, to altruistic. Egoists here means the persons who choose item 1, 2, 3, and altruists, 4 and 5 in the following question; Question; For whom do you think you live? Answer; 1) My-self 2) Children 3) Ancestor 4) Community 5) Nation or country More persons believed that the moral order of a society is more important than economic affluence. Almost seventy percent of the interviewed preferred that public policies be formulated for a better future life for the people than for immediate present well-being. Economic policies including those for increasing national income and increasing export were believed to be goood and effective in their implementation. However, taxes were regarded as too heavy. This shows that people rely much on the government for economic development on the one hand, but do not recognize their responsibilities to support those governmental efforts through taxes on the other. The Sae-Ma-Ul movement received as strong support as the economic policies and city development policies received sufficient support. But educational policies such as school expenses and ethics and moral education were denounced, as were the public health policies. 3. Differences among Strata ⑴ Region: people of rural communities regarded power and honour with more value than their urban counterparts, while urban people were more money-oriented. Rural people accepted tax policies more readily than did urban people, but they denounced the public health policies and educational policies mentioned above more severely than urban people. ⑵ Sex: men were more power and honour-oriented than women. Men preferred the moral order of scociety more than women, while women preferred economic affluence more than men. Export increasing policies, public health policies and school expense policies were accepted more readily by women. However, city development policies were accepted more readily by men. ⑶ Education: the more educated persons were more honour-oriented, emphasized the moral order of society and the better future life of the people more strongly than less educated persons. All these reflect the effects of moral education. However, from non-educated persons to high school graduates, the more educated the more money and power-oriented they were, while college graduates were far less money and power-oriented than middle or high school graduates. This points out the good effects of college education and some problems of middle and high school moral and ethics education. The more educated regarded the present compulsory educational system as more effective and school expences less expensive than the less educated. However, college graduate gave less support to the new school entrance system, while they gave the highest support to the Sae-Ma-Ul movement. ⑷ Age: the older persons emphasized the moral order of society more frequently and showed more political apathy than younger persons. They also accepted the public health policies more readily than the younger people. ⑸ Assets: the richer persons were more honour-oriented and regarded school expenses as less expensive than the poor persons. 4. Correlation between Values and Policy Acceptance ⑴ Money-oriented persons(who choose Money among given items of Money, Power, Honour and None) were much more egoistic (mentioned above in General Tendency) than the honour-oriented persons. ⑵ Honour-oriented persons accepted more readily than the money-oriented persons policies for increasing national income, reestablishing law, moral order and a better atmosphere of a society and the Sae-Ma-Ul movement (three of five policies analized in detail to test our hyphotheses about correlation between people's values and the degree of policy acceptance). Altruists supported policies for increasing national income and city development policies more strongly than the egoists. Therefore we assume that honour-oriented persons or altruists accept the public policies more readily than money-oriented persons or egoists.

ECLMS 알고리즘을 이용한 동시통화 반향 제거

오학준,정찬수 崇實大學校 生産技術硏究所 2001 論文集 Vol.31 No.-

This paper compares and analyzes the performance of the ECLMS algorithm and conventional LMS algorithms under a double-talk situation. The LMS algorithm has been a popular method to train adaptive FIR filters for echo cancellation due to its simplicity. In a double-talk situation, the LMS algorithm performs poorly when both near-end and far-end signals are presented. The error signal for obtaining the gradient becomes considerably large in such a double-talk situation. Conventional LMS algorithms usually stop adaptation when this situation happens to keep the coefficients freeze under a double-talk condition. Stopping rap adaptation is just a passive action to handle double-talk conditions, which results in lower adaptation speed. To solve this problem, expanded correlation LMS (ECLMS) algorithm has been proposed. It utilizes correlation as an input signal instead of the input signal itself. This algorithm could adapt the parameters continuously even in the double-talk situation, and showed good convergence property compared with conventional LMS algorithms as the normalized LMS (NLMS).