소화기의 역할 고찰을 통한 활용 방안 연구

백명기,손은수,송재수,조원철,이태식,Baek. Myoung-Gi,Sun. Eun-Su,Song. Jae-Soo,Cho. Won-Cheol,Lee. Tae-Shik 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1

The paper is to show the methodology that they have a new understanding of a fire extinguisher`s function and utilization through a deeper look. This new approach method will help to extinguish a accidental fire practically

채란계의 수익을 높이는 10가지 요점

백명기 대한양계협회 1976 월간 양계 Vol.8 No.7

A study for production simulation model generation system based on data model at a shipyard

백명기,이동건,신종계,우종훈 대한조선학회 2016 International Journal of Naval Architecture and Oc Vol.8 No.5

Simulation technology is a type of shipbuilding product lifecycle management solution used to support production planning or decisionmaking. Normally, most shipbuilding processes are consisted of job shop production, and the modeling and simulation require professional skills and experience on shipbuilding. For these reasons, many shipbuilding companies have difficulties adapting simulation systems, regardless of the necessity for the technology. In this paper, the data model for shipyard production simulation model generation was defined by analyzing the iterative simulation modeling procedure. The shipyard production simulation data model defined in this study contains the information necessary for the conventional simulation modeling procedure and can serve as a basis for simulation model generation. The efficacy of the developed system was validated by applying it to the simulation model generation of the panel block production line. By implementing the initial simulation model generation process, which was performed in the past with a simulation modeler, the proposed system substantially reduced the modeling time. In addition, by reducing the difficulties posed by different modeler-dependent generation methods, the proposed system makes the standardization of the simulation model quality possible.

Effects of Castration on Expression of Lipid Metabolism Genes in the Liver of Korean Cattle

백명기,Trang Hoa Nguyen,정진영,박민우,강혁중 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.1

Castration induces the accumulation of body fat and deposition of intramuscular fat in Korean cattle, resulting in improved beef quality. However, little is known about the metabolic adaptations in the liver following castration. To understand changes in lipid metabolism following castration, hepatic expression levels of lipid metabolism genes were compared between Korean bulls and steers. Steers had higher (p<0.001) hepatic lipids contents and higher (p<0.01) mRNA levels of lipogenic acetyl-CoA carboxylase. This differential gene expression may, in part, contribute to increased hepatic lipid content following the castration of bulls. However, we found no differences in the hepatic expression levels of genes related to triglyceride synthesis (mitochondrial glycerol-3-phosphate acyltransferase, diacylglycerol O-acyltransferase 1 and 2) and fatty acid (FA) oxidation (carnitine palmitoyltransferase 1A, C-4 to C-12 straight chain acyl-CoA dehydrogenase, very long chain acyl-CoA dehydrogenase) between bulls and steers. No differences in gene expression for very-low-density lipoprotein (VLDL) secretion, including apolipoprotein B mRNA and microsomal triglyceride transfer protein (MTTP) protein, were observed in the liver although MTTP mRNA levels were higher in steers compared to bulls. In conclusion, FA synthesis may contribute to increased hepatic lipid deposition in steers following castration. However, hepatic lipid metabolism, including triglyceride synthesis, FA oxidation, and VLDL secretion, was not significantly altered by castration. Our results suggest that hepatic lipid metabolism does not significantly contribute to increased body fat deposition in steers following castration.

대입스트레스증후군에 관한 정신의학적 연구

백명기,이길홍,이규항,민병근 중앙대학교 의과대학 의과학연구소 1988 中央醫大誌 Vol.13 No.1

The author attempted to analyze the effect of collage entrance test stress on adolescent‘s mental disorder to secure effective measures coping with collage entrance test stress syndrome. The subjects consisted of 29 third grade high school students and 24 repeatees who were admitted to the neuropsychiatric department of Chung Ang University Hospital and Yongsan Hospital from January 1981 to September 1987. Wide spectra of data from the personal history were obtained through administration of KARI-M questionnaire developed by Korean Adolescent Research Institute, medical records available through psychiatric interview and MMPI and opinions of staff psychiatrists, psychiatric residents, nurses and social workers. The collected data were processed by IBM PC AT computer, using SPSS program, and were statistically analyzed by findings were as follows: 1. Among the total number of psychiatrically hospitalized adolescent inpatients, 11.9% was found to be third graders of senior high school and repeatees, of which 56.6% was found to be hospitalized due to college entrance test stress. A66.7 percent of repeatees, as compared to 48.3% of third graders of senior high school, experienced college entrance test stress. Increment of hospitalization rate due to college entrance test stress markedly changed from 35.7% in 1985-1986 to 70.6% in 1987. 2. The diagnostic categories of examinees were classified as neurotic disorder (30.2%), psychotic disorder (28.3%), adjustment disorder (18.9%), affective disorder (15.1%) and drug dependence (7.5%) etc in the order of frequency. Minor neurotic disorders such as somatization disorder and anxiety disorder were more frequently observed in the third graders of senior high school who were preparing college entrance examination, whereas the control group was more likely to be serious schizophrenic. 3. Third grade examinees with test stress who had been relatively stable in premorbid adaptation level experienced moderate level of stress related especially to changes in school life such as poor academic performance, whereas the control group was found to be suffered from stress arising from changers in family life. 4. The main complaint items of examinees were tension (30.2%), depressed affect (24.5%), suicidal idea (18.9%), persecutory idea (17.0%), headache (15.1%), broken sleep (15.1%), dizziness (15.1%), shyness (15.1%), in these orders, respectively. Also found, among them, were frustration (11.3%), dysphoria (9.4%), loss of interest (9.4%), rage (9.4%), numbness (9.4%), and restlessness (9.4%) etc. In regard to the complaining symptom complex, examinees showed the most frequently somatization (30.2%), and next, depression (18.9%), anxiety (13.2%), sleep disturbance (11.3%) and psychotic symptom complex (11.3%). Examinees with college entrance test stress much more complained of somatizations including headche, abnormal sensation of extremities etc, and anxieties such as tension and restlessness. 5. Examinees with college entrance test stress were more oftenly led to the hospital by their parents and admitted to open wards for about 2 weeks, but were more likely to be rehospitalized due to recurrence of symptoms. It was tended to be more likely that third graders visit the hospital during the first week of March to June, while repeatees were hospitalized most frequently during January and February immediately after the entrance examination. 6. A 34.0 percent of patient‘s guardians showed a lot of resistances to therapeutic milieu, not desiring of exposure of their patient’s demerits, but insisting on their children being treated medically under their consents, further lacking of the insight concerning their children‘s mental problems. This result suggested that the parents tend to deny their children’s problems due to college entrance test stress. It was found that reassurance technique was most effective in order to reduce parent‘s resistances to therapeutic situations. 7. A93.0 percent of examinees showed various resistance including to therapeutic systems. Somatization (22.6%), rebelliousness (18.9%), persistent avoidance (18.9%) and intellectual pursuit (7.5%) etc. In particular, college entrance test stress group showed more often persistent avoidance and intellectual pursuit than control group. 8. The main drugs prescribed to the examinees with college entrance test stress were amitriptyline (20.8%), chlorpromazine (18.9%), and thioridazine (17.0%) etc. Particularly antidepressants such as amitriptyline were more frequently prescribed to patients with college entrance test stress (46.8%) than to the control patients (30.4%). 9. A 67.9 percent of examinees were found to have personality disorders before hospitalization. Significant among these personality disorders were dramatic cluster (37.7%) including histrionic personality, borderline personality, and antisocial personality, anxious cluster (20.8%), an odd cluster (9.4%) such as schizoid personality and paranoid personality. 10. The analysis of MMPI revealed that examinees showed more significant hysterical and hypochondriacal profiles and less significant psychopathic profiles and neurasthenic profiles. These results taken together suggest final conclusions as follows: 1. The college entrance test stress groups show much more depressive trend, various fluctuation in school life, more sensitivity in stress perception, short stay in hospital and higher rate of rehospitalization, even though more stable in premorbid adaptation ability and against anxiety, as compared with control groups. The college entrance test stress patients tend to be hospitalized to open ward most frequently in the first week of March to June which is the first semester of school period. Most patients receive drug treatments including antipsychotic, antimanic, and anticonvulsant drugs along with group therapy, rather than behavior therapy. 2. Repeatees with the college entrance test stress have more seriously psychopathological problems, as compared to the graders showed higher psychotic trend due to family conflict and/or schooling avoidant introverted disposition.

육계소비추세에 따른 가격변동과 예측의 실제

백명기 대한양계협회 1988 월간 양계 Vol.20 No.1

특강 ( 번식 ) ; Transgenic 동물의 생산 및 응용

백명기 한국동물자원과학회 ( 구 한국축산학회 ) 1993 한국축산학회 심포지움자료집 Vol.- No.-

Chemistry and Biology

백명기 한국고분자학회 2001 고분자 과학과 기술 Vol.12 No.2

WiBro 시스템에서 다중 안테나를 이용한 인지 무선 스펙트럼 센싱

백명기,허시영,양재수,김진영 한국정보통신설비학회 2008 한국정보통신설비학회 학술대회 Vol.2008 No.1

Cognitive Radio (CR) technology is proposed for using the unused spectrum band efficiently because of the spectrum scarcity problems. Spectrum sensing is one of the most challenging issues in cognitive radio system. In this paper, we focus on the signal detection of WiBro system band. As most of the modulated signals can be treated as cyclostationary random process, we can detect the signal of the OFDM signals in WiBro system. OFDM symbols using WiBro system have several pilot subcarriers and periodic pilots have cyclostationary characteristic. To improve of the detection performance, we get diversity gain using multiple antennas.

지능형 교통 시스템에서 협력 통신을 이용한 신호 검출

백명기,김진영 한국ITS학회 2008 한국ITS학회 학술대회 Vol.2008 No.1