플라즈마 EGR 조합시스템 전자제어 컴먼레일 디젤기관의 성능 및 NO_(x)ㆍTHC 배출물 특성

배명환,구영진,이동윤 慶尙大學校 經營行政大學院 2004 工學硏究院論文集 Vol.20 No.-

The aim in this study is to develop the combined turbo intercooler EGR system with a non-thermal plasma reactor for reducing exhaust emissions and improving fuel economy in ECU common-rail diesel engines. At the first step, the characteristics of performance and NO_(x) · THC emissions under four kinds of engine loads are experimentally investigated by using a four-cycle, four-cylinder, direct injection type, water-cooled ECU common-rail diesel engine with a combined turbo intercooler plasma exhaust gas recirculation(EGR) system operating at three kinds of engine speeds. The EGR and turbo intercooler system are used to reduce NO_(x) emissions, and the non-thermal plasma reactor and turbo intercooler system are used to reduce THC emissions. In this study, the plasma system is a flat-to-flat type reactor operated by a plasma power supply. The fuel is sprayed by pilot and main injections at the variable injection timing between BTDC 15˚ and ATDC 1˚ according to experimental conditions. It is found that the specific fuel consumption rate with increasing EGR rate is increased, but the fuel economy is better than that of mechanical injection type diesel engine as compared with the same output. Results show that NO_(x) emissions are decreased, but THC emissions are increased, as the EGR rate is elevated. NO_(x) and THC emissions are also slightly decreased as the applied electrical voltage of the non-thermal plasma reactor is elevated.

갑상선 초음파검진의 유용성

배오근,김재권,강명순,조영익,김임봉,신유진,임성규,서민호 한국건강관리협회 2000 건협 Report Vol.3 No.-

대형 2행정 디젤기관용 모터구동 실린더 주유펌프의 퀼 어큐뮬레이터 특성

배명환,옥현진 慶尙大學校 經營行政大學院 2004 工學硏究院論文集 Vol.20 No.-

Minimizing the cylinder wear and the consumption rate of cylinder oil in a large two-stroke diesel engine is of great economic importance. In Korean, a motor-driven cylinder lubricator was first developed for a large two-stroke marine diesel engine manufactured by W?rtsil? Switzerland Ltd. by author through the joint research of industry-university. In this study, the effects of revolution speed, plunger stroke and cylinder back pressure on maximum discharge pressure, maximum loss pressure, delivery delay duration and oil feed rate are experimentally investigated by the home-manufactured cylinder lubricator. The maximum discharge pressure with a spot of 0.03 m and the maximum loss pressure at spots of 10 m away from the end of lubricator slot are increased as plunger stroke, revolution speed and back pressure are elevated, and the delivery delay duration is shortened as plunger stroke, revolution speed are increased. Also, oil feed rate is increased as plunger stroke and revolution speed are raised, but lowered as the back pressure is increased.

치료환경에 따른 만성정신질환자의 삶의 질

배 안,김진학,박수희,김명규,김중원 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.6

연구목적: 일 지역사회(나주시) 만성정신질환자 대상의 치료환경을 그 환경적 특성에 따라 전통적인 외래치료환경, 개방적인 입원치료환경, 폐쇄적인 입원치료환경으로 분류하고, 각각의 치료환경에 거주하는 만성정신질환자의 주관적 및 객관적 삶의 질을 평가 비교함으로서 치료환경의 특성과 차이를 알아보고자 하였다. 방 법: 전통적인 외래치료환경 환자 85명, 개방병동 입원환자 67명, 폐쇄병동 입원환자 58명이었다. 이들에게 Lehman quality of life scale을 사용하여 반구조적 면담을 시행하여 삶의 질의 객관적 및 주관적 지표들의 지수를 측정하고 세 환경간 측정치를 비교하였다. 세 집단간의 차이를 분석하기 위해 ANOVA Test와 χ²검증을 사용하였다. 결 과: 환자들의 자율성과 다양한 정신사회재활 서비스가 제공되고 있는 개방병동 환자들의 전반적인 생활에 대한 만족도가 지역사회 및 폐쇄병동의 환자들에 비해 더 높았다. 지역사회에서 외래치료를 받는 환자들은 한달 쓰는 용돈이 많고 피해를 본 경험이 적었지만, 여가활동 및 사회적 접촉빈도가 입원환자에 비해 더 낮았고, 건강과 재정, 여가활동의 주관적 만족도도 더 낮았다. 입원치료중인 만성질환자들은 지역사회 환자들에 비해 여가활동 및 사회적 접촉빈도가 더 많았고, 월 평균 쓰는 비용이 더 적었지만 주관적 만족도는 오히려 더 높았다. 또한 이들은 최근 1년간 폭력 및 비폭력에 피해를 당한 경험이 더 많았으며, 건강에 관한 만족도는 더 높았다. 결 론: 치료환경의 특성에 따라 만성정신질환자가 보고하는 삶의 질에 차이를 보였으며, 개방병동에서 생활하고 있는 만성정신질환자들의 삶의 질이 가장 높았다. 향후 지역사회에 거주하고 있는 환자들의 삶의 질 향상을 위해서는 다양한 정신사회재활 서비스가 제공될 필요성이 있을 것으로 보았다. Objectives: This study aimed to figure out the characteristics and differences of therapeutic environment by classifying into closed-ward inpatient, open-ward inpatient and community residence out-patient environment and comparing objective and subjective quality of life of each group. Methods : The subjects consisted of 67 open-ward chronic inpatients, 58 closed -ward inpatients in the National Naju Mental Hospital and 85 outpatients living in Naju. We measured objective and subjective quality of life using semi-structural interview by Leman`s quality of life scale and compared the 3 groups. We used one-way ANOVA and chi-square test to analyze the differences of the 3 groups. Results: Open-ward inpatients who have autonomy and various community service program were more satisfied with their general life than the others. Community residence outpatients spent more money and less assaults experience but their leisure activities and social contact frequencies were lower than in the inpatients. Outpatients were less satisfied with their health, finances and leasure activities. Inpatients had made leisure activities and higher social contact frequency than outpatients. They were more satisfied with their finances despite of the spending less the money monthly than the outpatients. They experienced violence and damage more often for the past one year and were more satisfied with their health. Conclusions: The quality of life reported by chronic mental patients differed according to the characteristics of therapeutic environment. The life-quality of open-ward inpatients were the highest among the 3 groups. It is necessary to serve various community service program so that we can improve the life-quality of community residence outpatients.

이동 객체의 부분차원 스카이라인 검색 알고리즘

金鎭鎬,李慧明,朴永培 명지대학교 산업기술연구소 2008 産業技術硏究所論文集 Vol.27 No.-

Most of previous works for skyline queries have focused only on static attributes of target objects. With the advance in mobile applications, however, the need of continuous skyline queries for moving objects has been increasing. Even though several techniques to process continuous skyline queries have been proposed recently, they cannot process subspace queries, which use only the subset of attribute dimensions. Therefore it is not feasible to utilize those methods for mobile applications which must consider moving objects and subspaces simultaneously, In this paper, we propose a dominant object-base pruning method to compute subspace skyline of moving objects efficiently at query time and present the experimental results to show the effectiveness of the proposed method.

Cathelin-related antimicrobial peptide (CRAMP)의 화학합성 및 구조- 항생물활성

하종명,이상현,하배진 신라대학교 자연과학연구소 1998 自然科學論文集 Vol.5 No.-

CRAMP, a cathelin-related antimicrobial peptide was identified from cDNA sequence derived from mouse bone marrow cells. In this study, in order to investigate the structure-antibiotic function relationships of CRAMP, the mature CRAMP was synthesized by solid phase method using Fmoc-chemistry. CRAMP showed more potent antimicrobial activity against gram-positive bacteria than gram-negative bacteria. Minimum inhibitory concentrations of CRAMP against Bacillus subtilis and Escherichia coli were 3.125-6.25μM and 50μM, respectively. CRAMP displayed a powerful antitumor activity against human small cell lung cancer cell lines (50% growth inhibitory concentration : 13 μM). However, CRAMP did not show hemolytic activity against human erythrocytes at peptide concentration of 50 μM. CD spectra analysis showed that CRAMP will form an amphipathic α-helical structure similar to other antimicrobial peptides such as cecropins, melittin and magainins.

다시마 액즙의 추출조건

김명희,이영재,강훈이,강동수,김해섭,배태진 여수대학교 1998 論文集 Vol.13 No.2

To improve the utilization of sea tangle, the processing conditions of extracts, such as kind of additives, particle size of a sample, sample to solvent ratio, extracting temperature and time were studied. Among five extracting methods used for sea tangle extraction, the optimal method was water extraction. The most appropriate particle size of sea tangle powder, extracting temperature and mixing ratio of sea tangle to water were 5 mesh, 60℃ and 1 to 13(w/v), respectively. The basis of solids yield in sea tangle extract, optimal extracting time was about 2 hours. The yield of soluble solids under above-mentioned conditions was 5.1%.

새조개 가공부산물을 이용한 속성 액젓의 제조 및 저장안정성

김명희,조영철,배태진,손정호,김귀식 여수대학교 1997 論文集 Vol.11 No.2

A rapid processing for fermented fish sauce from cockle shell by-product and their quality and storage stability was investigated. The weight ratio of cockle shell by-product about the whole cockle shell was 32.7%, and contents of moisture, portein, lipid, carbohydrate and ash were 83.1%, 10.7%, 2.4%, 1.0% and 2.9%, respetively. The cockle shell by-product was homogenized with addition of water and hydrolyzed at 50℃ for 8 hours added 4% Protease N.P.(3.14ㆍ10⁴U/g). The hydrolysate was thermally treated at 100℃ for 60 minutes with 4% invert sugar and 20% table salt was finally added to the product. The chemical compositon of moisture, carbohydrate, ash, salinity, total nitrogen and amino type nitrogen of fermented sauce from cockle shell by-product were 65.4%, 3.9%, 20.8%, 18.9%, 1,683 mg% and 1,426 mg%, respectively. The major nucleotides and their relative compounds in the product were AMP and hypoxanthine and their contents were 3.36μ mole/g and 1.95μ mole/g. And major free amino acid were glutamic acid, lysine, leucine, valine and aspatic acid.

모 축전지 회사 근로자들의 연폭로 지표에 대한 경시적 관찰

강명식,김용배,이용진,리갑수,김화성,황규윤,장봉기,이성수,안규동,이병국 순천향대학교 산업의학연구소 1998 순천향산업의학 Vol.4 No.1

Lead poisoning is still prevalent and one of important occupational disease in Korea. To prevent undue high lead burden and maintain good health condition of lead workers in lead using industries, periodic health examination and regular biological monitoring of lead workers are often required in addition to the fundamental improvement of their working condition. To evaluate the effect of comprehensive occupational health program with regular biological monitoring on the level of lead exposure of lead workers in lead using industries, 11 year database from 1983 to 1994 of one storage battery factory was reviewed. From 1983 to end of 1986 only periodic health examination was provided to the lead workers, but from 1987 comprehensive occupational health program with regular biological monitoring was provided to maintain better health condition of lead workers. Selected study variables for lead exposure were blood lead(PbB), zinc protoporphyrin in blood(ZPP), δ-aminolevulinic acid in urine(ALAU), hemoglobin(Hb), hematocrit(HCT). Information on sex, age and work duration was also reviewed. 5 years data from 1983 to 1987 and 3 years data from 1990, 1993 and 1994 were available for all lead exposure indices except ALAU which has only 5 years data from 1983 to 1997. The results of 11 years longitudinal observation of lead indices are all follows: 1. The mean value of ZPP of lead workers in 1983 was 148.7±73.1 ㎍/㎗(Male: 145.5±72.3, Female: 168.1±79.1), whereas that of ZPP of lead workers in 1994 was decreased to 64.3±32.7 ㎍/㎗(Male: 60.2±28.8, Female: 95.2±43.4). 2. The mean value of PbB of lead workers in 1983 was 56.4±18.8 ㎍/㎗(Male: 55.59±19.1, Female: 59.6±19.1), whereas that of PbB of lead workers in 1994 was dcreased to 35.4±11.9 ㎍/㎗(Male: 35.7±12.0, Female: 32.8±10.8). 3. The mean value of Hb of lead workers in 1983 was 14.1±1.4 g/㎗(Male: 14.4±1.1, Female: 11.7±0.8), whereas that of Hb of lead workers in 1994 was increased to 15.6±1.5 g/㎗(Male: 15.9±1.2, Female: 12.9±1.1). 4. Blood lead is most highly correlated with ZPP(r=0.522, male:0.54 and female:0.50) and also correlated with ALAU and work duration also. 5. The simple regression analysis of PbB and ZPP showed different coefficient of regression by the measurement year, but there was no difference of coefficient of regression between sex. The slope of equation of pooled data for 1983-1986 without comprehensive occupational health program was 2.16 and differed from that of pooled data for 1987-1994(1.25). This difference suggests that the unit effect of blood lead on ZPP was relatively smaller in later period of comprehensive occupational health program than carly period without comprehensive program. The slope change in the analysis of linear regression of PbB on ZPP in lead workers can be used to evaluate the possible effect of health intervention to prevent undue high lead absorption in lead using industries. 6. 11 years occupational health service in this storage battery factory brought out considerable improvement of health status of lead workers in terms of decrease of PbB and ZPP and increase of Hb and the improvement was more remarkable after the introduction of comprehensive occupational health program.

부분차원 기반의 고차원 클러스터링 알고리즘

이혜명,김진호,박영배 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

Although many clustering algorithms for datamining are developed, most approaches are not designed for a clustering of high-dimensional data. Therefore, the performance of existing algorithms degenerates rapidly with increasing dimension because of especially the inherent sparsity of the data points. The subspace clustering technique by incremental projection. The incremental projection uses data distribution-dependent partitioning for optimal partitioning of data set. It makes better quality of the cluster by ensuring the efficiency and the effectiveness.