Numerical Studies on the Cost Impact of Incorrect Assumption and Information Delay in a Supply Chain

Heung?Kyu Kim 한국경영과학회 2010 Management Science and Financial Engineering Vol.16 No.3

In this paper, the impact of various system parameters such as the parameters of actual demand process, the review periods and the lead times, under each combination of inventory policies and information sharing, on the long run average inventory cost per period incurred at each participant in a supply chain, is considered. For this purpose, numerical studies are conducted, from which some valuable information as to how sensitive our long run average inventory cost per period are as the model parameters change is gleaned, from which, in turn, some managerial insights are gleaned in order for industry practitioners to perform better in supply chain management.

직장인의 스트레스 수준과 대처행동에 관한 연구

김흥규 ( Kim Heung-kyu ),김홍섭 ( Kim Hong-seob ) 인하대학교 교육연구소 2005 교육문화연구 Vol.11 No.-

The objectives of this study are to find out 1) the overall stress level of the industrial employees, 2) the differences of demographic variables(sex, age, religion, birth order, social level, income, residence style, home ownership and home scale) of the industrial employees, 3) the higher stress item among the stress cases of the industrial employees, 4) the differences in industrial employees stress coping methods according to sex, age, religion, birth order, social level, income, residence style, home ownership and home scale, 5) the differences on the overall stress situations of the industrial employees. Participants were 733 industrial employees between 20's and 50's(540 males and 193 females). The data were collected by the following tools: Social Re-adaptive Diagnostic Scale(42 items) standardized by Holmes and Rahe, Diagnostic Scale of Stress Situations developed by Kim Heung-Gyu(1994). The collected data were analyzed frequency analysis, t-test, and one-way ANOVA by SPSS 10.0. The findings of this study were as follows: First, 92.1% of the industrial employees showed no stress related problem, 7.9% of the employees showed serious level of stress conditions. Second, according to demographic analysis only sex, age, home ownership and home scale were found the differences of stress. Third, the most stressful factor during one year for the industrial employees was in the working condition. Fourth, Males have more confidence in coping with stress compares to females. Finally, the study shows that 40.8%(299 people) of the employees, the larger portion in the study, can in fact control their stress.

소아의 치과 외상에 관한 연구

손흥규,김옥경 大韓小兒齒科學會 1990 大韓小兒齒科學會誌 Vol.17 No.1

A statistical analysis of 324 children with traumatic injury charts was carried out to document and describe the dental trauma of patients visited pediatric dentistry in infirmary of dental cooege of Yonsei University, aged 0 to 14 years. The traumatic injury chart was analyzed for the distribution of age, sex, time of trauma, time elapsed, cause, occlusion, traumatized tooth/teeth, number of traumatized tooth/teeth, type of trauma, and emergency treatment. Of the 3546 patients treated initially in pediatric dentistry for one and a half years from Jan. 4, 1988 to Jun. 30, 1989, traumatically injured children were 324 patients. Results of this study were as follows: 1. The rate of traumatically injured patients was 9.1%. 2. Trauma to primary teeth reached a peak in prevalence between 2 and 3 years, and those to permanent teeth at the age of 9 years. 3. Boys suffered injuries more often than girls, the male to female ratio of the study patients being 1.5:1. The sex difference reached a peak at the age of 4 years. 4. The prevalent traumatized time was afternoon regardless of ages. 5. Sixty two percents of traumatized patients visited dental clinic within a day. 6. Fall down and collision to some material accounted for 68.1% of the causes of trauma. 7. The most prevalent traumatized teeth were maxillary central incisors in both dentition. 8. Average number of traumatized teeth were two. 9. Among the types of trauma, displacements were relatively frequent in deciduous teeth, and fractures in permanent teeth. 10. Of the emergency treatments, observation without actual treatment comprised 55% in deciduous teeth, 43.7% in permanent teeth. In decending order of frequency, splint, extration, pulpectomy comprised the treatments in deciduous teeth, and splint, pulpectomy, replantation in permanent teeth.

폐경기후 골다공증의 약물요법

노흥규,송치운,이진홍,안미애,송민호 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Postmenopausal osteoporosis is an enormous public health problem. Estrogens, and various drugs were developed and used for prevention and treatment of postmenopausal bone loss. In this study, We evaluated the effects of cycloprogynova, cyclofenil and ipriflavone on postmenopausal bone loss. Fourty post menopausal women were divided into 3 groups by treatment modalities Cyclofenil group (groupl), Cycloprogynova group(group 2) and Ipriflavone group(group 3). Basal bone mineral densities in all subjects were determined by DEXA(Dual Energy X-ray Absorptiometry) and those were compared with bone mineral densities after medication. The durations of medication in all groups were showed no statistical difference, group 1 11.4 ± 3.4 months, group 2 10.6 ± 3.9 months, group 3 12.9 ± 3.4 months. The patients of group 2 showed significant increase in bone mineral densities and the patients of group 1 and group 3 revealed no significant bone loss on paired T-test. Comparing with rates of bone loss in normal Korean postmenopausal women, the rates of bone loss in all subjects were effectively retarded. The significant bone loss (above longterm intertest coeffcient of variation) was noted in 8 patients out of 23 subjects in group 1, in 9 patietns out of 11 subjects in group 2 and in 2 patients out of 6 subjects in group 3. In conclusion, estrogen/progesteron(Cycloprogynova) replacemnt therapy showed most prominent bone preserving effect and Cyclofenil and Ipriflavone also effectively delays shorterm bone loss in postmenopausal women.

한정 액세스 수신 기술 동향

류영규,윤호선,조현숙,염흥열 순천향대학교 부설 산업기술연구소 1999 순천향 산업기술연구소논문집 Vol.5 No.2

방송에서의 제한 수신 시스템 (CAS) 은 모든 수신자에게 방송 정보를 수신토록 하는 것이 아니라 수신 권한(Entitlement) 이 있는 수신자만이 특정 방송 채널의 수신을 가능케 하는 시스템이다. 비용의 절감. 세계 시장 규모의 확대, 장비의 호환성 등의 이유 때문에 각 나라뿐만 아니라, 국제적 표준안을 규정 및 연구해가고 있다. 본고에서는 OPIMA, ARIB, DVB, ETSI, ITU에서 사용된 방송용 한정 액세스의 표준화를 동향을 살펴본다.

UR에 대응한 지역농업의 발전방안 : 시설원예농업을 중심으로 With an Emphasis on the Greenhouse Horticulture Farming

배흥규,김진수,이영기,정순재,정해진,이상학 東亞大學校 1995 東亞論叢 Vol.32 No.-

The production of greenhouse horticultural products in the east region of Kyungnam province is now increasing, though the productions of other argicultural sectors have been rapidly decreasing. However, as the agricultural market lies under the big pressure of the WTO system having a goal of free trade of all commodities, greenhouse horticultural farming in the region also meets with many new problems. To identify problems and prepare development strategies of the greenhouse horticultural farming for the easten Kyungnam region, 10 villages in Kimhae, Yangsan and Miryang areas were selected as sample areas and 204 greenhouse vegetable or floriculture farms were surveyed using prepared questionaires during March-April 1995. From the analysis of the regional survey results, the following proposals are suggested for the development of regional horticultural farming : 1) There were still old-fashioned greenhouse facilities such as tunnel-type vynil house, no heating system and man-power watering. Greenhouse facilities should be modernized and automated in order to overcome the severe labour shortage problem constraining the increase of the greenhouse farming size and the enhance the degree of the commodity value by uniform quality control and year-round production. The money for the modernization and automation of greehouse facilities ned to be supported by the central government, because farmers lack the ability to fund the investment. 2) Not many farmers visited agricultural extension officers to obtain cultivation techniques of greehouse horticulture farming, because extension officers lack the manpower to help solving the greehouse farming problems. Agricultural system should be adjusted to the changing agricultural production structure. Extension manpower specialized in greehouse horticultural farming need be increased and located in the regional extension offices. 3) The major reason of farmer's pessimistic prospect for the future of greegouse horticulture was the possibility of overproduction of some horticultural products. To avoid the overproduction, new entrants to the greenhouse horticultural farming of products already culticated extensively should be limited and the government support must be given to the existing greenhouse farms and major production areas. 4) Local goverment, associated agencies, and farmers should work hard cooperatively to increase the export of horticultural products especially to Japan, the largest importer of agricultural products in the world. Local governments and associated agencies can provide informations related to the export market and provide the fund for the facilities of standardization of export products. Farmers must observe the export contracts, even though the domestic price exceeds the export price. 5) Collective marketing activities of greenhouse products were found to be mainly limited to transportation and handling of sales revenue. Central and local government should support the formation and collective activities of cooperatives of specilaized producers to enhance the bargaining power of farmers. 6) The role of local government should be increased. They should actively participate in the orientation of regional greenhouse farming and play an important role in the marketing of regional greenhouse products.

B형간염 Vaccination후의 혈청 항HBs 항체 양성율에 관한 고찰 : According to the Method of Vaccination and Serologic Test

노흥규,한성필 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.1

To evaluate the positive rate of serum Anti-HBs antibody after vaccinaton for Hepatis B, the authors screened out the serum Anti-HBs Ab by PHA and RIA methods in 377 healthy subjects who finished 3 times of Hepatitis B vaccination. Those were serologically negative for HBsAg and HBsAb before vaccination in mass screening test with PHA test. The results were as follows. 1. The serum Anti-HBs were positive in 76.8% among 254 subjects with either PHA or RIA methods at 16 months after vaccination on hip or triceps muscle at various clinics. 2. In 57 cases who received the vaccine on the gluteal area the Anti-HBs(+) were in 59.6% with PHA and 63.2% with RIA test 12 months after vaccination. 3. In 66 cases who received the vaccine on triceps muscle, the Anti-HBs(+) were in 78. 0% with PHA and 92. 0% with RIA tests 4 months after vaccination at Dept. of Nuclear Medicine, CNUH. With the above results, it would be recommended that the site of injection, the careful handling of the vaccine were important to obtain immunity and the RIA method was much more correct to detect the serum Anti-HBs Antibody.

갑상선 기능항진증 환자의 골밀도에 관한 연구 : 예보

노흥규,성기양,윤상임 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.2

A preliminary study to evaluate the effect of thyroid function on the bone mineral density(BMD) was done. BMD was measured at lumbar spine 2, 3, 4 (A-P view) in 10 euthyroid nodular goiter, 8 primary hypothyroidism and 20 hyperthyroidism patients, perimenopausal or postmenopausal periods. Serum calcium, phosphorus, thyroid hormone concentrations and other parameters were measured to analysis. The results were as follows. 1. The BMDs of euthyroidism, hypothyroidism, and hyperthyroidism were 0.85± 0.16gm/㎠ (M±SD), 0.83±0.29 and 0.79±0.16 respectively, without any significant difference, but the BMD of hyperthyroidism was lowest. 2. The BMD of postmenopause of all thyroid disease patients was significantly lower than that of perimenopause patients. 3. There was no significant relationship between BMD and serum calcium, phosphorus, T_3, T_4 or duration of treatment for thyroid disease. In conclusion, the BMD is affected mainly by the age and thyroid function, so attention to osteoporosis must be considered for the patients of thyroid disease in menopause.

그레이브스병 환자에서 방사성 옥소(^131Ⅰ)치료의 효과

노흥규,안봉수,신재규,주언찬,송민호 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.2

Graves' disease is characterized by diffuse hyperplasia of thyroid gland, hypersecretion of thyroid hormones, ophthalmopathy, and localized pretibial myxema. Although the pathogenesis of Graves' disease is still obscure, but the TSH receptor antibodies have pathophysiological role in the hyperplasia of the gland and autonomous over production of thyroid hormones through the stimulation of TSH receptor. Radioiodine (^1311I) has been used for the treatment of Graves' disease for many years and is regarded as an treatment for the cases who is not remit following a course of antithyroid drug. To evaluate the efficacy and side effects of radioiodine treatment in Graves' disease, we studied clincal outcome after fixed dose(5-20mCi) of ^131I The results were as followings; 1) The mean dose of 9. 1mCi of ^131I administration makes 12 patients euthyroid out of 41 patients with Graves' disease. The dose of radioiodine(^131I) used for the treatment was not significantly different in hypothyroid group (3/41; 7.3%) or hyperthyroid group(26/41; 63.4%) after ^131I treatment. 2) The clinical outcomes after radioiodine (131I) treatment was not depend on the age and sex and thyrotropin receptor binding inhibitory immunoglobulins(TBII) of radioiodine(^131I) administered patients, but only the short duration of antithyroid drug treatment(the period of observation of the responce to antithyroid drug) before the radioiodine administration increase the incidence of radioiodine induced hypothyroidism. 3) The cumulative incidence of hypothyoidism after radioiodine(^131I) administration was 39.4% after third treatment. In conlusion, radioiodine treatment in fixed-dose is effective; it can induce euthyroidism or hypothyroidism in 33 out of 41 patients without major complications. With this study, we could confirm the efficacy of radioiodine treatment in a minor groups of patient who its difficult to maintain remission after antithyroid drug.

Adriamycin이 Mouse 십이지장선의 점액분비에 미치는 영향

오흥룡,이범이,이규식,정호삼 漢陽大學校 環境科學硏究所 1991 環境科學論文集 Vol.12 No.-

1.Alcian blue(pH 2.5)-PAS 이중 염색에서, adriamycin 투여 후 6시간 경과 후 mouse 십이지장선의 세포저부는 미약한 적색을 나타내었으나 세포첨부는 약한 적색을 나타내었다. Adriamycin 투여 후 12시간 및 24시간 경과군 mouse 십이지장선의 세포저부는 미약한 적색을 나타내었고 세포첨부는 중등도 적색을 나타내었으며, adriamycin 투여 후 48시간 경과군 mouse 십이지장선의 세포저부는 미약한 적색을 나타내었고 세포첨부는 약한 적색을 나타내었다. Adriamycin 투여 후 72시간 경과군 mouse의 대부분의 십이지장선은 세포저부 및 세포첨부에서 강한 적색을 나타냈으나 일부 십이지장선은 강한 청색을 나타내었다. 2. Alcian blue(pH 1.0)-PAS 이중 염색에서, Adriamycin 투여 후 6시간 mouse 십이지장선의 세포저부는 미약한 적색을 나타내었으나 세포첨부는 약한 적색을 나타내었다. Adriamycin 투여 후 12시간, 24시간 및 48시간 경관 mouse 십이지장선의 세포저부는 미약한 적색을 나타내었고 세포첨부는 중등도 적색을 나타내었다. Adriamycin 투여 후 72시간 경과군 mouse의 대부분의 십이지장선은 세포저부 및 세포첨부에서 중등도 적색을 나타내었다. 이상의 소견을 종합한 바, mouse에 adriamycin을 투여하면 십이지잔선의 세포에서 세포독성으로 작용하여 점액의 합성 및 분비를 억제하는 것으로 사료된다. 1. In alcian blue(PH 2.5)-PAS stain, the trace red color for PAS was observed at the alveolar cells in mouse duodenal glands of 6, 12, 24 and 48 hours groups treated with adriamycin, but strong red color was revealed at the alveolar cells in most of duodenal glands of 72 hours group and strong blue color for alcian blue was also observed at parts of glands. 2. In alcian blue(pH 1.0)-PAS stain, the trace red color was observed at the alveolar cells in mouse duodenal glands of 6, 12, 24 and 48 hours groups treated with adriamycin, but moderate red color was revealed in duodenal glands of 72 hours group. On the basis of the above results, it is consequently suggested that reduction of stain activity for mucin in adriamycin treated mouse duodenal glands was resulted from the adriamycin induced cytotoxicity to cytoplasmic organelles of alveolar cells.