지중내 공동 탐지를 위한 비파괴 검사 기법에 대한 실험적 연구

유정동(Jund Dong?Yoo),양학모(Hak Mo?Yang),장기창(Ki Chang?Jang),강승민(Seung Min?Kang),조소현(So Hyun?Cho),김현기(Hyun-Ki?Kim),Seung Soo?Kim,Da Bin?Jin 대한토목학회 2018 대한토목학회 학술대회 Vol.2018 No.10

韓國河川의 流出率과 流出指標로서의 洪水直前 流量

金熙鍾,柳又秀,金佳鉉,申東守,韓健模,全裕燦 東亞大學校 大學院 1984 大學院論文集 Vol.9 No.-

This paper is a study on relation between run-off ratio and antecedent discharge, run-off ratio and antecedent discharge per unit area, antecedent discharge and antecedent precipitation, by the data from the five major river basins in Korea and the small river basins in Pusan. The Nak-Dong rivers(An-Dong upper stream) f=0.4780+0.0124 ln qA r=0.99 qA=0.3368e0.1101R r=0.99 f=0.5793+0.0146 ln(qA/A) r=0.99 The Nak-Dong rivers except Ga-song station f=0.2017-0.0840 ln qA r=0.75 f=0.7012+0.0750 ln(aA/A) r=0.71 The Han rivers f=-0.0035+01267 on qA r=0.75 f=1.1311+0.1263 ln(qA/A) r=0.71 L=302.9064-43.8490 ln qA r=0.84 The Geun rivers(Mu-sin Cheon) f=0.295+0.1823 ln qA r=0.93 f=0.8417+0.1823 ln(qA/A) r=0.93 L=40.0456+62.0346 ln qA r=0.94 The Yeong-san rivers f=0.3766+0.0598 ln qA r=0.79 f=0.8084+0.0599 ln(qA/A) r=0.79 The Seom-jin rivers f=-1.3875+0.6505 ln qA r=0.92 f=2.1633+0.3465 ln(qA/A) r=0.76 Small river basin in Pusan f=0.3635+0.1120 ln qA r=0.87

自殺企圖患者에 對한 臨床的 考察

劉東洙 大韓神經精神醫學會 1978 신경정신의학 Vol.17 No.4

The author studied 84 suicide attempters hospitalized to the department of neuropsychiatry of Seoul National University Hospital, from 1975 to 1978. Some of the clinical characteristics of the suicide attempters were as follows; 1. Females outnumbered males. Most common age bracket was from 29 to 30 years. About three fourths of them belonged to middle and lower social classes and a majority of them had education of high school and college. One third of them belonged to the diagnostic category of affective disorders, the other one third to schizophrenia, and the rest to neuroses, personality disorders and others. 2. Those who attempted suicide two times or more were 44% (37 cases) of the total attempters. 3. Drug was the most common method of the attempt (63%), and hyponsedative was the most common drug (42%). Seventeen % of the attempts were done by drugs prescribed by psychiatrists. 4. A majority of the suicide attempts occured after precipitating events, after an average period of 13 days, 91% of which occurred within 4 weeks. 5. The precipitating events were found in 55% of the attempters; those, in order of frequency, were frustrated love affair, family disharmony, and financial and personal loss. About half of the of the attempts were associated directly with psychiatric symptoms such as depression, delusion and auditory hallucination. The other half was motivated directly by attention seeking or inferiority resulting from conflictful interpersonal relationships such as frustrated love affair and family disharmony. 6. Direct or indirect communication of suicide intent was expressed in 73% or more of the subjects. 7. Fifty one percent of them were attempters with intermediate seriousness. Among the cases of "forced admission", there was no attempter with the lowest seriousness, but all of such case (11%) were those with intermediate and highest seriousness. Remaining 86%, (72 case) of the attempters were admitted compliantly by advice. 8. The number of attempters discharged prematurely whithin 2 weeks was 24 (29%). Especially the number of patients with depressive neurosis, chronic alcoholism, and personality disorders discharged in less than 2 weeks was about 3 times as many as control patients with the same diagnoses. The mean duration of hospitalization of the attempters with alcoholism, and personality disorders was about 11 days, wherea that of the control patients with same diagnoses was 35 days. 9. The number of patients dischargedagainst discharged against medical advice was 32 (38%), and about half of them (15 cases) were discharged due to inadequate understanding of psychiatry on the part of the patients and their family. 10. Thirty one patients (37%) never entered in follow-up care recommended by their attending doctors. A majority of them (18 cases) were patients with depressive and hysterical neuroses, alcoholism and personality disorders. A great majority (41 cases) of 49 cases who received follow-up care for one month or more were patients with schizophrenia and major affective disorders. The patients with depressive and hysterical neuroses hospitalized for suicide attempt were followed up in a small minority of them only ; follow up rate of the control group with the same diagnoses was much higher. All of the eight attempters (10%) with alcoholism and personality disorders failed to receive follow-up care. Suicide attempters with underlying mental disorders including antisocial and other personality disorders, alcoholism, and depressive and hysterical neuroses seemed to have hostility in their basic personality make-up. Therapist is advised to have not only an understanding of this basic problem but also an insight into the possible countertransference feelings of the therapist himself. Furthermore, it is important that the family should be taught about the lethality of suicide attempt, and should be prepared to be more cooperative to the treatment and to be able to help the suicide attempters when hearing "the cry for help". The author considered about some limitations of this study. In sampling control group, the attitudes of the subjects and their family toward psychiatry should have been considered. In addition, geographical and numerical limitation of the samples inevitably prevented the author from a generalization of the data into a premature conculusion applying to suicide attemrts in Korea. We have still crude ability of predictation of or protection from the suicide. The author attempted to reach an understanding of and method of dealing with the underlying psychopathology of the suicide attempters who might happen to end their own lives.

일부 도시지역 성인들의 혈중지질치의 참고치 및 저콜레스테롤혈증에 미치는 요인 분석

유기하,이동배,이태용,조영채,김수영 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.1

Data from 3.982 adults participating in a health examination in a university hospital were analysed to determine the reference values of hyperlipidemia and hypolipidemia, and those were compared with American data. Also health related behaviors affecting hypocholesterolemia were investigated. 29.3% of the males diseased subjects, and as were 25.6% of the females in their twenties, 69.5% of the males in their 60s and 78.6% of the females in their 50s. The rate of diseased subjects tended increase with increasing age. The rates of the diseased were 60.1% for males and 55.2% for females. Among cardiovascular risk factors, the proportion of hyperlipidemia was 46.6%, fat liver 42.2%, hypertension 21.8%, glucose intolerance 13.7%, abnormal EKG 11. 0%, obesity 2.9% and anemia 1.7% for male subjects and hyperlipidemia was 31.2%, fat liver 29. 5%, anemia 27.5%, hypertension 21.1%, abnormal EKG 15.7%, obesity 7.3% for females in that order. The rates of cardiovascular risk factors were higher in males than in females except for anemia, abnormal EKG and obesity. The total cholesterol levels of 95 percentile for males and females were 227.0 mgldl, 226.0 mg/dl and the 5 percentile levels for males and females were 134.0 rag/dl, 131.0 mgldl, respectively. The LDL cholesterol level of 95 percentile for males and females were 150.0 mg/dl, 147.0 mgldl, and the 5 percentile were 53.0 mgldl, 51.0 mg/dl, respectively. The HDL cholesterol 95 percentile levels for males and females were 82.0 mg/dl, 83. 0 mg/dl, and those of 5 percentile were 36.0 mg/dl and 39.0 mg/dl, respectively. These data show that the mean levels of total cholesterol, triglyceride, LDL cholesterol were related to increased age in both sexes, and were slightly higher in the females than in the males over all ages, but those of HDL cholesterol decreased. The high cholesterol level group was associated with age, the amount of alcohol consumption, smoking and body mass index. But that was not associated with meat intake and regular exercise. No significant difference were found among the rates of all diseases except for diseases and anemia up to 160 mg/dl of cholesterol level in both sexes. Sex, regular exercise and glucose intolerance were revealed as influencing factors in the low serum cholesterol levels, but disease and abnormal EKG had a lowing effect for the low cholesterol risks. In conclusion, the reference values of Korean serum lipids were 5-25 mg/dl lower than Americans. The cut-off value to diagnosis hypolipidemia for the Korean is recommended as below 140 mg/dl of serum total cholesterol. The hyperlipidemia cut-off value should above 220 mg/dl of serum total cholesterol.

고등급 보안 시스템을 위한 IPSec 시스템 기능 명세

유희준,김영미,최진영,서동수,노병규 고려대학교 컴퓨터과학기술연구소 2001 JOURNAL OF COMPUTER SCIENCE & ENGINEERING TECHNOLO Vol.3 No.-

현대 사회는 인터넷 사용자의 증가와 제반 기술의 비약적인 발전으로 사회활동 전반에 대한 인터넷 기반 서비스가 이루어지고 있다. 이런 과정에서 발생한 중요한 문제중의 하나가 불특정 다수가 자유로이 통신을 하기 위해 개발된 인터넷상에서 사용자의 보안을 보장해주는 것이다. 최근에 와서 인터넷상에서 개인 정보유출로 인한 많은 피해가 발생하면서 정보보호에 대한 관심이 더욱 증가하고 있다. 현재 이 문제를 해결하기 위하여 많은 보안 관련 시스템들이 개발되고 있으며, 세계 각 국의 표준 기구에서는 이러한 시스템에 대한 등급을 평가하고 있다. 각 등급을 살펴보면, 시스템 개발 초기부터 정형기법을 이용하여 개발되어진 시스템들이 고등급을 획득하고 있다. 국내에서도 한국정보보호센터(KISA)에서 보안 시스템에 대한 등급을 평가를 수행하면서 정형기법을 이용하여 땅세 검증된 시스템에게 K5이상의 고등급을 부여하고 있다. 이러한 등급을 살펴보면, 시스템의 기능을 정형명세언어를 이용해서 명세하는 부분을 공통적으로 요구하고 있다. 본 논문에서는 높은 보안 등급의 IPSec 관련 시스템을 개발하기 위해서 정형명세언어인 Z를 이용해서 IPSec의 동작을 명세하였다. The modern community is moving across the whole areas based on Internet with the growing Internet users and the great technological development. One of the important things that can be problem in this community is that the Internet should assure secure networking and security mechanism for the many security-ignorant users. Recently, Due to a lot of damages like a personal drain, security concerns is growing very rapidly. Now, many security application system is developing to solve this problem and each of the world standard organizations is evaluating these security application systems. Considering the each levels, we found that system using formal methods from the initial system development process acquired the high-level. In domestic, KISA manages the evaluation of security system and gives the higher than K5 to the system that specified and verified using formal methods. In this all levels, it should be required the system specification part. In this paper, we specified IPSec using formal specification language Z to develope the high-level IPSec system.

혼화재 종류 및 친환율에 따른 콘크리트의 염소이온 침투저항성 평가에 관한 연구

유재강,김동석,이상수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

This research was to investigate the invasion and diffusion properties of chloride ion on the concrete containing mineral admixtures. Mineral admixtures contained in mixes were fly-ash, ground granulated blast-furnace slag, silica fume, and meta-kaolin. For the Rapid Chloride Penetration Test(RCPT), Tang and Nilsson's test method was used to estimate chloride ion diffusion coefficients of that mixes. And the RCPT test results were compared with the penetration depth measured from long-term ponding test with 3.6% sodium chloride solution. As a result, the diffusion coefficient of chloride ion were reduced with the use of mineral admixtures and the compressive strength was related with the diffusion coefficient of chloride ion. The diffusion coefficients from the RCPT and the penetration depth at 91 days of ponding test with the sodium chloride solution have a well established.

확률론적 해석법에 의한 연직배수 영향인자 민감도 분석

유남재,전상현,정길수,김동건 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B

A probabilistic analysis model, one of reliability analysis methods introducing the concept of probabilistic variables, was developed to investigate the uncertainty of dominant factors influencing the degree of consolidation in the radial consolidation theories. Based on the developed probabilistic analysis model, sensitivity study of those factors was performed to find their trends of affecting the degree of consolidation in the vertical drain method. Various radial consolidation theories, Proposed by Barron(1948), Hansbo(1979), Yoshikuni(1979) and 0noue(1988), were used for this parametric study with the influencing factors such as size of smear zone, reduction ratio of permeability in the smear zone, discharge capacity, permeability for horizontal flow and coefficient of consolidation for horizontal flow. As results of this sensitivity study, for the given consolidation theory, contribution of each factor to the degree of consolidation was figure out and compared to each other. For the given value of each factor, the sensitivity to the degree of consolidation in the various theories was evaluated and their applicability and limitations were assessed.

펄스 옥시미터 시스템 구현에 관한 연구

유동주,허 웅,김근이,이호재,임현수 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-

In this paper, we implemented a pulse oximeter system which is measured oxygen saturation coefficient of a human blood in vivc We use the Beer-Lambert Law to measure the percentage of hemoglobin is oxygen saturation. The oximeter sensor are consisted of two LED(RED and INFRARED LED) and a single photodiode. The photodiode measures lights which transmitted through the tissue from two light source alternately, We calculated a ratio of light transmittance between two LEDs and then, it applied for the oxygen saturation coefficient calculation to formula. As a result, the oxygen saturation coefficient that measured from normal conditions men was 96.43[%]

교대말뚝기초의 측방유동에 관한 원심모형실험

최동혁,정길수,박병수,유남재 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B

This paper is an experimental result of investigating lateral soil movements at piled bridge abutments by using the centrifuge model facility. Three different centrifuge model experiments, changing the methods of ground improvement at bridge abutment on the soft clayey soil (no improvement, preconsolidation and plastic board drain (PBD), sand compaction pile (SCP) + PDB), were carried out to figure out which method is the most appropriate for resisting against the lateral soil movements. In the centrifuge modelling, construction process in field was reconstructed as close as possible. Displacements of abutment model, ground movement, vertical earth pressure, cone resistance after soil improvement and distribution of water content were monitored during and after centrifuge model tests. As results of centrifuge model experiments, preconsolidation method with PBD was found to be the most effective against the lateral soil movement by analyzing results about displacements of abutment model, ground movement and cone resistance. Increase of shear strength by preconsolidation method resulted in increasing the resistance against lateral soil movement effectively although SCP could mobilize the resistance against lateral soil movement. It was also found that installment with PBD beneath the backfill of bridge abutment induced effective drainage of excess pore water pressure during the consolidation by embanking at the back of the abutment and resulted in increasing the shear strength of clay soil foundation and eventually increasing the resistance of lateral soil movement against piles of bridge abutment.

중추신경계질환에서 병소부위에 다른 요류역학적 관찰

이동국,이상도,유영수,박영춘,임정근,이 형 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.2

This study was undertaken to evaluate the correlation between urodynamic findings and localization of CNS lesions in patient with voiding disturbance. The patient group consisted of 48 patients (35 male and 13 female) with various localization of CNS lesions confirmed by CT or MRI among which were 9 cerebral cortex, 8 putamen and internal capsule, 6 thalamus and internal capsule, 7 brain stem and 18 spinal core. m and 18 spinal core. Nineteen of the 42 patients with various CNS lesions above sacral crod showed detrusor hyperreflexia. Six of the 7 patients who had suprasacral cord lesion and detrusor hyperreflexia showed detrusor sphincter dyssynergia. In 6 patients with sacral cord lesions, 5 patients showed detrusor areflexa. In summary, detrusor sphincter dyssynergia with detrusor hyperreflexia and detrusor areflexia seemed to be specific urodynamcic pattern of suprasacral spinal cord and sacral cord lesion, respectively. But other CNS lesion showed no consistent specific urodynamic pattern.