외부 프리스트레스 도입에 의한 노후된 콘크리트 거더교의 보강성능평가

박승범,홍석주,이봉춘,장석호,권혁준 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

One of the promising methods to enhance the flexural strength of a externally prestressed girder is to place the tendons with large eccentricities. The analysis and design of composite girders prestressed by external tendons involve difficulties related mainly to the position of anchorages and the construction sequences. This study was conducted on the concrete bridges reinforced by the continuous girders and the external prestressing. The test results in this study showed that the external prestressing of a composite girder increased the range of the elastic behavior, reduced deflections, increased ultimate strength, and added to the redundancy by providing the multiple stress paths.

교원 근무성적 평정제도 개선에 관한 연구

박천순,신현석 고려대학교 교육문제연구소 1996 敎育問題硏究 Vol.8 No.-

南北 詩文學 比較 硏究 : Centered on Poems of 1980's 80년대 詩를 중심으로

朴喆石 東亞大學校 1993 東亞論叢 Vol.30 No.1

Centering on North Korean Gi-Ga in 1980's, I hgave studied generally heterogenity beteen South Korean poems and North Koerens' in many aspects. North Korean Si-Ga has differences in many aspect with South Korean poems in characteristics of genres, figure of expression, themes, and matrials. This is due to the fact that North Korean Si-Ga should be made by the strict policy of literature and art following the nation and the party with difference from South Korean poems that have scarcely factors to be limited. Consequenlty North Korean Si-Ga has been being written by writing order of subjective theory of literature and art, based on characteristics of party, of class, and of the people. This differentiating South Korean poems and North Korean that seperation between south and north for nearly 40 years incur cannot be easily overcome. But the possibility of overcoming it from the standpoint of us wishing united literature should not be given up in advance. The fortunate thing is that a possibility of overcoming can be found in both changes of South Korean poems and North Koreans'. Reality of South Korean Public poetry or Labour poetry and expansion of lyricism in North Korean Si-Ga in 1980's, must contantly support the possibility of approch of both poems to each other.

소각장 환경영향평가시 수은 배출 계수에 관한 연구

전미경,박석순 이화여자대학교 환경문제연구소 1998 이화환경연구 Vol.2 No.-

The amount of mercury emitted from an incinerator depends on the properties of waste, combustion condition, and control devices. Mercury concentration in air proportionates to the increase of incinerator installation. The purpose of this study is to provide a method for determination of mercury emission factor which can predict the amount of mercury emitted from each incinerator specifically. Case study was performed for N municipal waste incinerator. Based on the method presented in this paper, we obtained mercury emission factor as 1.85∼1.95g Hg/t at N Municipal waste Incinerator and this result was regarded as reasonable when compared with existing mercury emission factor in reference cases. Fluorescent lamps turned out to be the most important source(44.4%) of mercury in municipal waste and its amount will tend to increase, while batteries less significants. In additions, medical waste is one of the major source of mercury.

콘크리트 교량 및 강교의 상시감시 시스템에 관한 연구(Ⅰ)

박승범,홍석주,이봉춘 忠南大學校 産業技術硏究所 1998 산업기술연구논문집 Vol.13 No.1

The construction of large scale civil and building structures which form the base of social economy has been grown greatly. As the increasing of aged and deteriorated structure, it is necessary to evaluate the safety of those structures. The deterioration, safety evaluation repair and rehabilitation are important problems in the construction area that every country faces. This paper presents the general information on how to conduct a data analysis of long-term monitoring system and evaluate the characteristics of surveying methods.

고온고습으로 저장된 백미의 이화학적 및 취반 특성

박석규,전순실,박미연 순천대학교 기초과학연구소 1994 基礎科學硏究誌 Vol.5 No.-

The quality difference of milled rice stored at a low temperature and optimum humidity(LTH) and a high temperature and humidity (HTH) was determined by the methods of acidity of fat, brown color index, reducing sugar and microflora. Moisture contents of milled rice stored at LTH and HTH for 10 weeks were 14.7% and 19.5%, respectively. Moisture content after 8 weeks of LTH and 4 weeks of HTH exceeded 13% on dry basis, growth-limiting moisture of mold. Brown color index and reducing sugar contents of milled rice stored at HTH were slightly higher than those of LTH. There was a notable difference in acidity of fat between milled and brown rice stored at HTH. The apperance(p<0.05) and texture(p<0.01) of cooked rice after storage for 10 weeks at LTH and HTH were significantly different in sensory evaluation with no significant difference in odor and taste. Mean values of breaking test in rheometer were better in LTH than in HTH for taste score. Growth of mold and bacteria in rice were not increased by storage. Rice weevil exhibited imago in brown rice and milled rice after storage of 5 weeks and HTH. Milled rice stored at LTH for 2 weeks did not absorb Kimchi odor from refrigerated chamber.

染色廢水의 Simultant 處理

이춘식,김형석,박승조 동아대학교 환경문제연구소 1993 硏究報告 Vol.16 No.1

When the dyeing complex wastewater was treated with simultant process using the 8.0% aluminum sulphate solution and MMA(goods on trial sale), the optimum dose of 8.0% aluminum sulphate solution and MMA, the fluction of MLSS concentration, COD removal rate and SS removal rate were analyzed. The following conclusions were obtained from the experimental results ; 1) In case the MMA of 400, 600mg/l was injected, effluent COD and MLSS were respectively 38mg/l and 894, 1,235mg/l. This case showed excellent results as compared with the case that the same concentration of 8.0% aluminum sulphate solution was injected. 2) Incase the 8% aluminum sulphate solution of 400, 600mg/l was injected, effluent COD and MLSS were 53.48mg/l and 502, 540mg/l, respectively. 3) In case the 8% aluminum sulphate solution and MMA were not injected into aeration tank, the MLVSS in aeration tank was about 400-500mg/l and COD, SS of effluent were 68mg/l and 74mg/l, respectively.

임대아파트의 수선비용 관리시스템을 위한 데이터베이스 구축

이춘경,정영한,박태근,김광우,김창덕,김옥규,황영삼,박홍석 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

It shows that a variety of side effects result from the housing-supply policy focused in quantity. In a rental apartment for the low-income group, a shortage of maintenance cost in facilities become aggravated. The rapid progress of obsolete leads the lessor to the economic loss as well as a baneful influence to national economy. Also, the maintenance skill brings inadequacy by reason of technique development focused on new construction. As a result, the cost which needs for maintenance should get accomplished to application toward economy analysis and attempt considered management and financial affairs. Simultaneously, it should keep and administer a lot of data of maintenance affairs during life cycle in apartment and set up the way for aiding the situation of maintenance process.

두부 외상 환자의 고혈당과 예후와의 상관관계

현석천,이종안,박준석,박상문,김갑득,장인성,김승열,송화식 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

Severe head injury is associated with a stress response that includes hyperglycemia, which has been shown to worse outcome during cerebral ischemia. To better define the relationship between head injury and hyperglycemia, admission glucose level were analyzed in 150 head injured patients from January 1995 to December 1995. Our retrospective study demonstrated a higher glucose level in patients with low Glasgow Coma Scale(GCS) score, especially at 3-5 GCS score, compared to those with high GCS scores. Also a higher glucose level was noted in patients with vegetative state and dead than in those with good recovery and moderate disability. Hyperglycemia(serum glucose level≥200mg%) was associated with decreased level of consciousness and a poor outcome. We conclude that admission hyperglycemia is a significant indicator of severity of injury(p<0.001), but not significant predictor outcome from head injury. After controlling for the influence of the GCS score, glucose levels do not have an independent effect on outcome.

복부외상 환자에 관한 임상적 고찰

현석천,박준석,김갑득,송화식 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

This report is a retrospective clinical study of 60 patients with abdominal trauma admitted and treated at the department of emergency medicine of DanKuk University hospital during the period from January 1995 to December 1995. we obtained following results. 1) The sex distribution was 45 males(75%) and 15(25%) females with significant predominence in male(3:1), and the age distribution revealed high incidence in second to fourth decades(50%). 2) The cases of the abdominal trauma were traffic accident(80%) in most common, violence, fall down in order frequency. All were blunt trauma. 3) The clinical manifestations and physical examination were abdominal pain(92%), abdominal tenderness, rigidity, decreased bowel sound, rebound tenderness in order frequency. 4) The shock status on admission(below 80 mmHg in systolic) were 10 cases with high mortality(30%). 5) The hematocrit changes in serial check after admission were 36 cases(60%). 6) The diagnostic methods were abdominal paracentesis, simple X-ray, abdominal sonography, abdominal CT, and DPL(Diagnostic Peritoneal Lavage). The abdominal paracentesis showed positive 36 cases(63%) among 48 cases. Abdominal paracentesis was one of the valuable diagnostic method in abdominal trauma. The Abdominal CT was the best diagnostic method in solitary organ injury, but the diagnostic rate was very low(25%) in small bowel injury. 7) The injured intraabdominal organs were small bowel(41%), liver(30%), spleen(20%), and kidney(17%). 8) The commonly associated extraabdominal injury were chest trauma(30%), upper and lower extremity injuries(20%), head trauma(15%). 9) The overall mortality rate was 5%, in abdominal trauma with multiple injury.