불량매립지 보수를 위한 분류체계모형 개발

홍상표,구성회,우세홍,김을환,최한영 서울보건대학 1997 서울보건대학 부설 한국보건과학연구소 논문집 Vol.4 No.1

LHR(Landfill Site Hazard Ranking Model)was developed for assessing the relative hazard of landfill sites by using the method of value-structured approach. LHR consists of combining a multiattribute decision-making method with a qualitative risk assessment approach. AHP(Analytic Hierarchy Process)based on the pairwise comparison method was applied to determine weights of landfill site factors related. To determine the relative hazard of landfill sites evaluated, hydrogeological factors, waste characteristics factors and recptors factors were evaluated by LHR. LHR can help decision-makers prioritization of remediation of landfill sites through the relatively convenient and concise evaluation metl10d of landfill site features related. LHR focuses mainly on pathways of groundwater and surfacewater for evaluating landfill hazard to receptors including humans. To validiate the applicability of LHR, Nanjido Landfill site, Metropolitan Landfill site, and Hwasung Landfill site were evalulated. LHR scores of the above-mentioned landfills were 55, 19, and 7 respectively.

자가 Fibrin Glue와 연골세포를 이용한 연골조직 공학 기법에 관한 연구

홍성표,범진식,박재경,김진영,이두형 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

Neomorphogenesis of cartilage using chondrocyte-polymer constructs is a potential source for development of cartilage reconstruction. Current tissue engineering techniques of neocartilage rely on in vivo implantation of polymer-chondrocyte constructs. The purpose of this study was to find a way to bioengineer cartilage in vitro by entrapping chondrocytes in a molded autologous fibrin glue. Chondrocytes isolated from the cartilage of rabbit joints were combined with fibrinogen extracted by a single cryoprecipitation of autologous plasma, and they were then polymerized with thrombin to create a fibrin glue with a final cell density of 2.5x10?? cells/ml. The collagen for a control study was used as a polymer. The polymer-chondrocyte constructs were cultured for 4 weeks and the fibrin-chondrocyte constructs molded in the shape of a human ear were cultured for 6 weeks in vitro. Morphometric, histochemical, and histomorphometric analysis including glycosaminoglycan quantitation confirmed the following results: 1) Highly-concentrated autologous fibrinogen was easily extracted by a single cryoprecipition of autologous olasma. 2) The fibrin-chondrocyte constructs demonstrated the presence of actively proliferating chondrocytes with the production of cartilaginous matrix(collagen and glycosaminoglycan) at 1 week after culture, as well as gross and histologic evidence similar to those of normal cartilage at 3∼4 weeks after culture. 3) The collagen-chondrocyte constructs demonstrated lower degrees of hardness and transparency, as well as a lower density of cells and glycosaminoglycan during the culture period. 4) Neocartilage generated from fibrin-chondrocyte constructs in the shape of a human ear nearly retained their original configuration and size without degeneration for 6 weeks of culture in vitro. This study demonstrated a novel method for bioengineering the molded cartilage in vitro using autologous fibrin glue as a matrix scaffold. The generated cartilage showed gross and histologic evidence similar to those of normal cartilage, retaining the original gross dimension. With further refinement, this may be a new application of tissue engineering for the reconstruction of cartilage.

폐결핵 환자의 우울 상태

홍정표,최선희,조만종,이성주,박종,김기순,김양옥 朝鮮大學校 附設 醫學硏究所 1997 The Medical Journal of Chosun University Vol.22 No.1

The main purpose of this study is to identify and evaluate the depressive states for the patients with chronic pulmonary tuberculosis. A questionnaire(Self-rating Depression Scale, SDS) survey was performed toward 57 pulmonary tuberculosis patients with initial treatment who started chemotherapy and 53 pulmonary tuberculosis patients with retreatment, admitted to one tuberculosis-centered hospital and two general hospital. Fifty three healthy persons as control group were investigated with the same questionnaire for comparison. The survey was performed from July to August 1996. The results are as follws : 1. The patients had significantly high scores in the depression than control and the patient with retreatment showed significantly high scores in the depression than the patient with initia1treatment(P<0.01). 2. The depressive levels of the patients were associated with duration of admission and the expectancy of recovery (P<0.05). 3. The percentage of the subjects with 40 or more scores tentatively classifiable as psychologically depressed was 67.1% of the total subjects, 48.4% of the control groups, 75.0% of the patient with initial treatment and 84.1% of the patient with retreatment. Because patient with pulmonary tuberculosis with initial treatment showed higher depression scores than normal persons, and patients with retreatment due to failure of initial treatment showed higher depression scores than initial treatment, it is necessary to give attention to depression of the patients during treatment of pulmonary tuberculosis.

메모리 공유형 다중 프로세서의 동기화를 위한 Spin-Lock 기법의 성능 분석

홍춘표,이종임,남상균 대구대학교 과학기술연구소 1997 科學技術硏究 Vol.4 No.3

Most of the shared-memory multiprocessor system provide a hardware primitive for supporting mutually exclusive accesses to shared data. The hardware primitive consists of instructions that atomically read and write a single memory location. When a processor is accessing a shared data, the lock is set to busy, and other processors must wait until the lock is released. This paper analyse the characteristics of four spin-lock alternatives, and compare the performance of the proposed scheme through the simulation on shared-memory multiprocessor (Sequent-Balance). The simulation results show that all the spin-lock alternatives for synchronization degrade overall performance as the number of spinning processors increases. In addition, a variant of Ethernet backoff scheme shows good performance even for large numbers of spinning processors. Because of its simplicity, backoff scheme has better performance when there is no contention for the lock.

粘性土地盤의 N値와 土質特性과의 相關性

홍원표,박성현 중앙대학교 기술과학연구소 2001 기술과학연구소 논문집 Vol.31 No.-

지반조사에서는 원위치시험으로는 표준관입시험, 정적콘관입시험, 동적콘관입시험, 스웨덴 식사운딩시험, 베인시험 등이 실시되고 있다. 특히, 이들 가운데 표준관입시험은 간편하면서도 유용한 원위치시험으로 가장 널리 이용되어져 오고 있다. 표준관입시험으로부터 얻어진 N치는 지반의 지지력, 침하량, 점착력, 내부마찰각, 상대밀도, 변형계수 등 다양한 해석정보를 얻는데 활용되고 있으나, N치의 지반특성과의 관계의 상관성에 대하여 아직 명확히 조사되어있지 않은 실정이다. 본 연구에서는 점성토지반에서의 표준관입시험에 의한 N치와 지반특성의 상관성을 규명하여 보고자 우리나라 서남해안지역의 연약한 점성토 및 내륙지역의 견고한 점성토에 대한 현장지반조사 및 실내시험 자료를 분석하였다. 본 연구의 결과는 결국, Atterberg한계, 자연함수비, 습윤 및 건조밀도, 일축압축강도와 압축지수 등과 같은 물리적, 역학적 특성의 예측에 이용될 수 있을 것이다. In soil investigations, in situ tests, such as standard penetration test, static cone penetration test, dutch cone penetration test, Swedish sounding test, vane test, etc, are performed as a part of main investigation. Especially, standard penetration test is most widely used as useful test in situ. N-value from the standard penetration test could give a numerous interpretation such as judgement of ground bearing capacity, settlements, cohesion, internal friction angle, relative density, modulus of deformation, etc. Nevertheless, in some respect to clear the correlations between N-value and soil properties are not enough yet. In this study, in order to find the correlations between N-value and soil properties in cohesive soils, the soil test data have been analyzed. The data was given by both the field soil investigation and laboratory test performed on soft clay in west and south coasts and stiff clay of inland areas in Korea. The results of this study might be available to predict some soil properties, such as the Atterberg limit, natural water content, wet and dry densities, unconfined compression strength and compression index, by use of the standard penetration test results in fields.

정보통신 기업의 질적 연구개발활동과 기업규모간 관계에 대한 실증분석 : 연구계획의 우수성을 중심으로

홍성표,박상욱 충남대학교 경영경제연구소 2002 경영경제연구 Vol.25 No.1

기술개발중심 기업은 연구개발 활동이 기업의 성공과 실패에 지대한 영향을 미치므로 기업 내·외부 여건을 고려하여 연구개발활동에 자원투자를 하여야 한다. 따라서 기업규모외 연구개발 결과물간의 관계를 살펴보는 것은 기업이 연구개발 정책수립시 보다 나은 선택을 할 수 있다는 데에 가치가 있다 하겠다. 본 논문에서는 기업규모가 상대적으로 중요하지 않다는 정보통신분야에서 기업규모가 연구개발활동에 미치는 영향을 살펴보았으며 이를 토대로 정보통신산업분야에 있어 연구개발정책수립이 효율적으로 수립될 수 있을 것이다.

환경갈등의 대안적 분쟁해결을 위한 환경영향평가

홍상표 청주대학교 2017 産業科學硏究 Vol.35 No.1

1985년에 경상북도 상주시에서 온천 보호구역으로 지정하며 촉발된 문장대 온천 개발사업의 갈등해결을 위하여 대안적 분쟁해결 기법(ADR)을 적용하기 위한 환경영향평가(EIA)를 효과적으로 활용하는 것은 지속가능한 발전목표(SDG)를 실행할 수 있는 과학적이며 제도적 방안으로서 실질적인 정책수단이다. 문장대 온천개발의 환경갈등을 해결할 수 있는 방안으로서 온천 개발계획을 승인하기 전에 온천 폐수로 피해를 받을 행정구역의 시장/군수의 의견을 반드시 반영하도록 하며, 온천 용출수의 온도가 현행 25℃이상에서 40℃ 이상으로 되어야 한다로 온천법을 개정시켜야 무분별한 온천개발의 환경훼손을 방지할 수 있다.

CTBN고무 분산 에폭시 복합재의 기계적물성 및 파단면에 관한 연구

洪錫杓,崔相久 全北大學校 1989 論文集 Vol.31 No.-

We examined the mechanical properties (flexural and impact) and fracture surface of CTBN(carboxyl terminated butadiene acrylonitrile) rubber dispersed epoxy composites which are cured with MTHPA(methyl tetrahydro phthalic anhydride) or DICY(dicyandiamide). Rubber dispersed epoxy composites are prepared to blend epoxy mixture with CTBN rubber or CTBN rubber modified epoxy. It contains 0-25% CTBN rubber of liquid compoment. The results obtained in this experiment are as follows ; 1. The flexural stength is better in using the CTBN rubber than CTBN rubber modified epoxy. 2. In excess of 25% CTBN rubber, the cured epoxy composites are closed to rubber rather than epoxy in properties. It is very flexible. 3. In respect of the flexural stength and flexural modulus, CTBN x13 rubber is superior to CTBN x8 rubber. In excess of 5% CTBN rubber, The mechanical properties of both decrease sharply. 4. In respect of the impact stength, flexural stength and rubber dispersion, MTHPA is superior to DICY.

녹내장에서 격자무늬 자극 시유발전위검사와 망막전위도검사

홍승표,김상하 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.1

목적 : 격자무늬 자극을 이용한 시유발전위검사와 망막전위도검사는 신경절 세포의 기능을 나타내는 것으로 알려져 있다. 저자들은 녹내장 한자에서 민감하게 변화하는 격자무늬 자극 시유발검사 (PVEP) 및 격자무늬 자극 망막전위도검사 (PERG)의 parameter를 알아보고자 하였다. 대상 및 방법 : 정상안 78안, 고안압증 14안, 초기 녹내장안 24안 및 중증 녹내장안 34안을 대상으로 시야검사, 전기생리검사를 실시하였으며, 전기생리검사는 The International Society for Clinical Electrophysiology of Vision에서 제시된 방법에 의하여 PVEP 및 PERG를 실시하였다. 결과 : 정상안에서 PVEP 및 PERG는 개인간의 차이가 상당히 심하였다. PVEP의 진폭과 정점잠시는 성별 및 연령에 따라 유의한 차이를 보였다. 여성이 남성보다 정점잠시는 더 짧았으며 진폭은 더 높았다. 2.0c/deg PVEP의 진폭과 정점잠시에서 연령과의 상관관계를 보였으며 고령에서 진폭이 더 높아지고 정점잠시는 더 지연되었다. PERG에서는 transient-state PERG의 P50 정점잠시를 제외한 대부분의 parameter에서 연령과의 유의한 상관관계를 보였으며, 고령에서 transient-state PERG의 P50과 N95의 진폭, steady-state PERG의 second harmonic component의 magnitude 등은 감소되었으며 phase shift는 더 지연되었다. ANACOVA로 연령과 성별을 보정하고 실시한 정상안과 다른 군간의 비교에서 초기 녹내장안과 중증 녹내장안에서만 유의한 차이를 보였으며 0.5c/deg PVEP의 P100 진폭과 transient-state PERG의 N95 진폭등이 다른 지표들에 비하여 녹내장에 더 예민하게 반응하였다. PVEP 및 PERG는 자동시야검사 표준지표들과 거의 모든 parameter에서 유의한 상관관계를 보였다. 결론 : 이상의 결과로 PVEP 및 PERG가 초기 녹내장에서 유의하게 변화하는 것을 알 수 있었는데, PVEP 및 PERG는 연령이나 성별에 따라 변화하고 개인간에 상당한 차이가 있으므로 실제 임상에서 사용하는데 어려움이 있으며 정상 범위의 설정이나 분석방법에 대한 더 많은 연구가 필요할 것으로 사료된다. The pattern-reversal visual evoked potential and pattern-reversal electroretinogram has been known to reflect the activity of ganglion cell. Visual field and electrophysiological tests were carried out in 78 normal control eyes, 14 eyes with ocular hypertension, 24 eyes with early glaucoma, and 34 eyes with advanced glaucoma. The PERG and PVEP were performed according to the recommendation of the International Society for Clinical Electrophysiology of Vision. In normal control data, variability was sufficiently large that it must be considered before a functional abnormality could be established in clinical patients. There were alterations in the PVEP amplitude and latency related to gender and age. In female, the P100 latency tended to shorten and the P100 amplitude to increase. In the elderly, the P100 amplitude at 2.0 c/deg was increased and P100 latency at 2.0c/deg delayed. In both the transient- and steady-state PERG, all the parameters, except P50 latency, revealed significant correlations with age. The P50 amplitude, N95 amplitude, and magnitude of the second harmonic component decreased with age. The phase shift of the second harmonic component also revealed age-dependent increase. An analysis of covariance revealed that only early and advanced glaucoma could be differentiated from normals. The P100 amplitude of the PVEP at 0.5 c/deg and the N95 amplitude of the transient-state PERG may be the most valuable indicators suggesting the glaucomatous damage. The parameters of the PVEP and PERG had significant correlations with the visual field indices.

수도권 매립지 粘土遮水膜의 透水特性에 관한 연구

洪相杓,金丁勖 서울大學校 環境大學院 1993 環境論叢 Vol.31 No.-