EEG 센서 신호를 이용한 Brain-Computer Interface 시스템

배일한,이동우,명현,이민호 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

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.

다시마 액즙 제조

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

This study was intended to raise solids yield in the sea tangle extract. Sea tangle extracted by additions of acetone, methyl alcohol, isopropyl alcohol and ethyl alcohol. Among four solvents used for sea tangle extraction, the optimal solvent was ethyl alcohol. The most appropriate method of sea tangle extraction was two-stage extraction, that extracted with addition of ethyl alcohol and residue was extracted with water(1:13, w/v). As the optimal conditions of ethyl alcohol were 25℃ and 70%, respectively. The basis of solids yield in sea tangle extract, optimal extracting time was about 1 hour. The yield of soluble solids under above-mentioned conditions was 18.2%. Drinking product was made by adding 0.1% citric acid, 2% sorbitol and 2% oligosaccharide to the sea tangle extract(Brix 10).

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.

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%.

대전 관류(貫流) 하천에 서식하는 어ㆍ패류의 중금속함량 조사

김동현,곽명순,이동배 忠南大學校 環境問題硏究所 1992 環境硏究 Vol.10 No.-

In order to know the concentrations of heave metals in freshwater fishes and shellfishes, the fishes and shellfishes were sampled and analysed from GAPCHEON, YUDEUNGCHEON, TAEJONCHEON and KEUM River in Taejon city during the period from September through November 1990. The results were as follows: 1. The mean concentrations of the heave metals in fishes and shellfishes were : 0.147±0.034㎍/g Pb, 0.026±0.034㎍/g Cd, 2.439±1.181㎍/g Mn, 0.532±0.251㎍/g Cu and 0.146±0.099㎍/g Hg. The concentrations of the five trace metals in fishes and shellfishes were significantly different from each species. 2. The mean concentrations of the heave metals in fishes by streams were that Pb, Cd and Cu in KEUM River, Mn in TAEJONCHEON was higher then other streams. The mean concentrations of Mercury in fish were significantly from each species, whereas the mean concentrations of other elements in streams were not significant. 3. The mean concentrations of the heave trace metals in fish by streams were that Pb, Cd and Mn in KEUM River, Cu and Hg in TAEJONCHEON was higher then other streams. The mean concentrations of Mn and Hg in shellfish were significantly from each species, whereas the mean concentrations of other elements in streams were not significant. 4. The mean concentrations of the heave metals in fish and shellfish have a higher tendency to lowerstreams than upperstreams, but The mean concentrations of the heave metals in fishes and shellfishes by stream positions were not significant. 5. In correlations of concentrations among the heave metals in fishes, significant positive correlation were observed between Pb & Cd, Pb & Mn, Pb & Cu and Cd & Cu, whereas correlations among other elements were not significan. 6. In correlations of concentrations among the heave metals in shellfish significant positive coreelation were observed between Pb & Cu, Cd & Cu, Cd & Mn, and Mn & Hg, whereas correlations among other elements were not significant.

High Performance Liquid Chromatography를 이용한 Hemoglobin A1C 측정

변동원,서교일,유명희,김극배 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.2

Hemoglobin AIc(HbAlc) has been known to be an index of long-term glycemic control (6-8weeks), and offers several practical advantages for screening of diabetes mellitus and evaluation of effects of treatment. Authors introduced to measure and investigate HbAlc levels by high performance liquid chromatoraphy (HPLC ; LDC Milton Roy, USA), with cation exchange column, Mono S HR 5/5 (Pharmacia). The results were as follows; 1. The mean HbAlc level in normal adult control group (n=50) was 4.13±0.25% (Mean±S.D). 2. Within-run precisions of HbAlc levels measured by HPLC were 4.39±0.01% (Mean±S.D.), 1.41(C.V.) in normal control, and 8.95±0.02% (Mean±S.D.), 1.65(C.V.) in intermittently treated diabetic patients, and 11.02±0.01% (Mean±S.D.) 2.93(C.V.) in untreated diabetic patients. 3. Between-run precision of HbAlc levels measured by HPLC were 4.35±0.01% (Mean±S.D.), 2.76(C.V.) in normal control, and 8.98±0.01% (Mean±S.D.), 1.22(C.V.) in intermittently treated diabetic patients, and 10.95±0.15% (Mean±S.D.), 3.51(C.V.) in untreated patients. 4. The peak level of HbAlc was obtained in about 9 minutes and the whole program could be completed within 17 minutes. 5. Blood specimens could be stored for as long as 8 days at 4℃ without changes of HbAlc levels. These results suggest that the measurement of HbAlc by HPLC using cation exchange column is so accurate, simple and rapid that the clinical use is more wider.

객체 지향 S/W 설계 데이타 관리자의 개발

梁在東,崔東雲,金哲洙,裵明男 全北大學校 1993 論文集 Vol.35 No.-

In this paper, we propose an Object-Oriented Design Data Manager(ODM) for supporting the object-oriented software development environment based on Object Modeling Technique(OMT)[9]. That is, we design a scheme to properly manage various relationships among design data occured in the OMT-based software development environments.

만성신부전증 환자에서 Recombinant Human Erythropoietin 치료에 따른 혈액지표와 Hemoglobin A1c에 대한 연구

이세영,배성한,변동원,서교일,유명희,김극배 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2

Hemoglobin A1c is produced by a progressive, non-enzymatic reaction between glucose and hemoglobin within the erythrocytes. The HbA1c concentration is dependent on the plasma glucose level and the stage of development of the erythrocytes. Immature erythrocytes contain lower levels of glycosylated hemoglobin than mature erythrocytes. HbA1c level was decreased in short RBC life span. Therefore, HbA1c level is not only measure for assessment of moderate to long term glycemic status in diabetics, but also as a possible diagnostic parameter of anemia. The aim of this study was to evaluate the HbA1c level in patients with chronic renal failure with anemia. HbA1c concentration, iron, ferritin, TIBC and hematologic parameters were measured before treatment and 1, 2 months after administration of recombinant human erythropoietin. The HbA1c concentration was measured by high performance liquid chromatography with cation exchange column (Pharmacia). The results were as follows; 1. The mean of hemoglobin was 8.66 g/dL in the controls and 7.84 g/dL in the patients with chronic renal failure. The mean of hematocrit was 25.19 % in the controls and 23.14 % in the patients with chronic renal failure. The mean of MCV was 93.23 fL in the controls and 92.73 fL in the patients with chronic renal failure. The mean of MCH was 32.56 pg in the controls and 31.76 pg in the patients with chronic renal failure. The mean of HbA1c was 3.15 % in the controls and 2.95 % in the patients with chronic renal failure. 2. Hematologic parameters in the patients with chronic renal failure 1) The results of hemoglobins were 7.84 g/dL, 8.11 g/dL, 8.92 g/dL, the MCH were 31.76 pg, 32.87 pg, 33.20 pg, the results of MCV were 92.73 fL, 97.37 fL, 92.85 fL at before treatment and 1, 2 months after administration of r-HuEpo. 2) The results of hematocrits were 23.14 %, 23.73 %, 26.73 % at before treatment and 1, 2 months after administration of r-HuEpo. 3. Iron metabolism parameters in the patients with chronic renal failure 1) The results of iron test were 180.92 ㎍/dL, 137.79 ㎍/dL, 126.83 ㎍/dL at before treatment and 1, 2 months after administration of r-HuEpo. 2) The results of ferritin test were 1500.2 ng/ml, 1311.6 ng/ml, 1151.0 ng/ml at before treatment and 1, 2 months after administration of r-HuEpo. 3) The results of TIBC test were 282.17 ㎍/dL, 282.45 ㎍/dL, 278.83 ㎍/dL at before treatment and 1, 2 months after administration of r-HuEpo. 4. The results of HbA1c test were 2.95 %, 3.08 %, 3.18 % at before treatment and 1, 2 months after administration of r-HuEpo. It is suggested that, in patients with chronic renal failure, evaluation of HbA1c in diabetics who have anemia with chronic renal failure should be consider possible hematologic parameters, and HbA1c level would be one of the marker of anemia status, but further studies are needed.

초경 시작 시기가 여성 정신분열병 환자의 병의 경과에 미치는 영향

김진훈,윤선욱,배명지,임선진,정은기,장동원 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.5

Objectives : The protective effects of estrogen against the development of schizophrenia have been investigated in various perspectives, Previous studies showed patients with earlier age of menarche had later onset of schizophrenia and less frequent admissions. This study was performed to evaluate the effect of the age of menarche on subsequent courses including hospitalizations, suicidal attempts, Physical harm to others, and psychotic symptoms in women with schizophrenia. Methods : Self-report menarche age, onset of psychotic symptoms, and clinical status were collected in a sample of 108 Premenopausal women with the diagnosis of schizophrenia. Results : There was significant correlation between the age of menarche and the frequency of admissions (r=.321, p=.006). Also, Patients with history of physical harms to others showed later age of menarche than those without (t=2.025, df=106, p=.045). Conclusion : In women with schizophrenia, the age of onset of menarche affects subsequent courses indicated by frequency of admissions and violent behaviors. It is suggested that identifying the age of menarche might be helpful to predict the courses in women with schizophrenia. Further investigations regarding the relationship between estrogen and the courses of Schizophrenia in women are needed.