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이준배 한국농업경제학회 2009 農業經濟硏究 Vol.50 No.5
Multidimensional Scaling(MDS), Self-Organizing Map(SOM) and K-means method are common tools for clustering analysis in market segmentation. This study investigate validity analysis of alternative clustering results obtained using the algorithm named MSK(MDS+SOM+K-means) composite model. Thus, the MSK uses the combined MDS and SOM model to determine an initial solution, and then applies K-means algorithm to find the final solution for the rice market segmentation. In order to verify the MSK composite model, the subjects selected for the analysis were 284 housewives living in Seoul. The reported results show that the MSK model is significantly better than the MDS, SOM, K-means, and MDS+SOM model with respect to mean within cluster variations(MWCV). As a result, the MSK model showed the optimal segments number and the rice market in Korea was divided into 9 segments. Each segment was identified by distinctive characteristics such as consumer behavior, demographic characteristics and purchasing attitudes. Therefore, there are consumer groups with various shopping orientations and purchasing behaviors in the rice market.
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이준배 대한영상의학회 1983 대한영상의학회지 Vol.19 No.3
The authors analyzed ultrasonographically the total 45 cases of thyroid disease verified by historical diagnosis, functional diagnosis, and morphological diagnosis at the Department of Radiology, Busan National University Hospital from June to September 1982. The results obtained were as follows : 1. In the sex distribution female was 38 cases (84.4%), and male 7 cases (15.6%). The second, third, and fourth decades of age (78.0%) were most prevalent. 2. Among the total 45 cases thyroid adenoma was 24 cases (53.3%), nodular hyperplasis 8 cases (17.7%), thyroid carcinoma 7 cases (15.6%), diffuse hyperplasia 3 cases (6.7%), Hashimoto's thyroiditis 1 cases (2.2%), subacute thyroiditis 1 cases (2.2%), tuberculous thyroiditis 1 cases (2.2%) in orders. 3. On ultrasonogram, total 24 cases of thyroid adenoma showed a single nodule in 24 cases (100.0%), smooth outer margin in 23 cases (95.8%), capsular echo in 23 cases (95.8%), pure cystic nodule in 4 cases (16.7%), and increased echogenicity in 17 cases (85.0%) among the 20 cases excluded the pure cystic nodules. 4. Total 7 cases of thyroid carcinoma showed no capsular echo in 4 cases (57.1%), irregular outer margin in 4 cases, no pure cystic nodule in all cases, and enlargement of metastatic lymphonde in 4 cases (57.1%). 5. Total 8 cases nodular hyperplasia showed enlargement of thyroid gland and multiple nodule in 8 cases (100.0%), and increased echogenicity in 7 cases (87.5%). 6. Total 3 cases of diffuse hyperplasia showed enlargement of thyroid gland and increased echogenicity in 3 cases (66.7%). 8. The cold area visualized on radionuclide scan could be differentiated from a solid mass and cystic one by ultrasonogram.
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이준배 대한영상의학회 1990 대한영상의학회지 Vol.26 No.2
Authors studied on the radiological findings of chest radiographs of 1,028 welders engaged at the shipyard in Pusan from January 1st, 1985 to December 31 th, 1986, and also analyzed the radiologic findings by age, duration of dust exposure, subjective symptoms and other associated abnormal radiologic findings. the results were as follows : 1. Small rounded opacities which suggest pneumoconiosis were noted in 107 cases (10.4%). 2. According to ILO classification of the profusion of small rounded opacities, 49 cases (4.8%) are category 0/1 and 58 cases 95.6%) are category 1/0-2/2. 3. The prevalence rate4 of pneumoconiosis increased significantly as the age and the duration of dust exposure increases. 4. The shape and size of regular opacities in pneumoconiosis were 46.6% of p type, 53.4% of q type, and there was no r type. Large opacities were not found. 5. The prevalence rate of pulmonary tuberculosis was radiologically 2.4% in all subjects, It was higher in pneumoconiosis grou (5.6%) than that of non-pneumoconiosis (2.1%). (P,0.05) 6. The main subjective symptoms were sputum (26.2%) mild dyspnea (14.6%), coughing 912.3%), easy fatigability (8.7%) and chest pain 97.4%). The incidence of mild dyspnea and coughing increased significantly in pneumoconiosis group (P<0.01). The 63..6% of pneumoconiosis and 75.8% of non-pneumoconiosis were asymptomatic.
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이준배,우장명 한국농업경제학회 2002 農業經濟硏究 Vol.43 No.5
Many forces have challenged to agriculture and educational systems in agricultural college. At present, their main forces are rapid social changes and educational reform including the structural transformation of college system, reorganization of curriculum, diverse recruitment of student, and specialization of university development. The purposes of this study were to analyze the present status and educational problems of agricultural economics in university and to suggest directions for improvement of that in the changing and reforming age. Those objectives were carried out through the literature and mail survey. Ten departments of agricultural economics in university were investigated to collect the educational philosophy and goals, curriculum and instructions, research and other educational activities. Also, to study about the adjustment and values on their major of the students of agricultural economics, data were collected from 752 students at 10 departments of agricultural economics by administering a questionnaire. One of the basic data for curriculum development of department is taxonomy of agricultural economics. Major areas can be classified and organized by the knowledge of structure of taxonomy of agricultural economics. Unfortunately, there is no taxonomy of agricultural economics which will be agreed by agricultural economists and will be useful data for curriculum development. Analyzing the curriculum of 10 departments, we can find that the subject matters of curricular are almost same among the departments of the each university. Most of departments of agricultural economics operate both of undergraduate and graduate program without considering of quality of faculty members, students, and facilities. One of the reasons for lack of characteristics of each department of agricultural economics is that educational objectives of each department are not developed objectively and not described exactly. The educational objectives and goals of agricultural economics should be defined with identity and the justification of agricultural economics set up in the post-industrialized society in changing world. Curriculum of the department of agricultural economics are also reorganized to meet the development of agricultural science and industry, needs of the students, the society and notion.
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이준배,이예람,남윤성,김진웅 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.8
Temperature-responsive hydrogels were fabricated by the photo-polymerization of bis-acryloyl poloxamer tri-block copolymers, and their temperature-responsive behavior and physiological effect on skin were investigated. For this, poloxamer macromers were prepared by end-capping both terminal hydroxyl groups of poloxamer tri-block copolymers with acrylates. They were then photo-polymerized to generate polymeric hydrogels with structural integrity that allowed excellent stability against dilution in an aqueous environment. The resulting hydrogels exhibited dramatic reversible swelling behavior upon changes in temperature. A demonstration experiment, in which the hydrogels were applied topically to the skin, showed that they shrank rapidly as a result of the increase in temperature, owing to the contact with the skin surface, highlighting their effectiveness for instantaneously moisturizing the skin.
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