• 한국의류산업학회지
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• 제16권4호
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• pp.635-644
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• 2014

This study provides basic reference data for brassiere wearing conditions, design preferences of new silver women (50s-60s) and development of brassiere products. We compiled and compared 163 pieces of brassiere (considering of 105 domestic general brassieres and 58 foreign silver brassieres) analyzed using SPSS Statistics 21 program. A survey was then conducted on the actual wearing, purchasing conditions, design preferences for 176 females (50s-60s). The result of this study are as follows: First, comparing actual product conditions (domestic general products and foreign silver products), the ratio of full cup in cup height, V-shape type in neckline shape, long type in front-end length, wide type in wing width, U-shape type in shoulder strap form, wide type in shoulder strap width, no-wire brassieres in breast wire type, all-in-one type in shoulder strap separation, back type in closure type appeared higher than other types of brassiere in domestic general product. Second, a study also showed that 60s women's wearing time is lower than 50s women's; however, 60s women expressed a higher figure and preference for the purchasing ratio in the department store, full cup in cup height, short type in length of brassieres, wide type in wing width, U-shape in shoulder strap form, small type in shoulder strap width, back type in closure type and no-wire brassieres than those in their 50s. It was found they prefer fabric with a high natural content, nude tone color without decoration & pattern and camisole brassieres.

• Elastomers and Composites
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• 제52권4호
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• pp.317-325
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• 2017

Molding conditions can be described as factors that determine the quality of a product obtained from injection molding. Many studies have been performed on the injection molding pressure, injection temperature, packing pressure and other molding conditions related to part quality. However, the most accessible factor among the adjustable molding conditions during actual injection is the injection speed. In this study, we simulated the variation of the physical quantity according to injection speed and performed experiments to understand the effect of injection speed on the actual product. A CAE analysis program (Moldflow) was used to simulate and analyze the results using PC and PBT for two models. In order to compare these results with the experimental results, an actual injection molding was performed for each injection speed, and the correlation between simulation and injection molding, especially for the shrinkage of the molded article, was discussed.

• 한국기계가공학회지
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• 제16권5호
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• pp.105-112
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• 2017

In this study, plastics were deformed after molding due to the characteristics of the material. The Taguchi experimental design method was utilized to find the molding conditions that minimized deformation of the plastic bezel to be assembled in an automotive steering wheel. The injection molding conditions applied to the experimental design method are the melt temperature, cavity plate coolant temperature, core plate coolant temperature, and cooling time. Each condition was divided into five levels, and a total of 25 experiments were planned. However, instead of performing 25 actual molding experiments, the injection molding analysis was performed using the Moldflow program, and the deformation values for each molding analysis were obtained. The optimal molding conditions were obtained from these deformation values. The actual injection molding experiment using optimal molding conditions was compared with the deformation amount of the current molded product. The deformation was measured using a precise 3D scanner. The deformation amount of the molded product under optimal molding conditions was 16.1% lower than the deformation amount of the current molded product.

• 한국의류산업학회지
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• 제14권6호
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• pp.983-991
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• 2012

The purpose of this study was to provide basic reference data for the development of slim-fit dress shirts patterns for a variety of body somatotypes. For this study, a survey was conducted on the actual product conditions of slim-fit dress shirts of domestic brands(Actual wearing and purchasing conditions, fit, design preferences). The survey was conducted on 135 men in their 20s~30s. PASW Statistics 18 was used for data analysis. The result of this study are as follows : Analysis of the actual wearing conditions of dress shirts indicates that consumers own an average of 1~2 classic-fit shirts and 1~4 slim-fit shirts. These are normally worn once or twice a week, and purchased mainly at department stores, agencies, direct sales markets or outlets. With respect to the purchasing factors, price and style were the main priorities. Surveyed consumers had the greatest preference for designs with a non-darted front and a darted back, a semi-wide collar and the color white. By classifying the surveyed by somatotype, Type B preferred designs darted on both front and back, Type A preferred designs with a non-darted front and a darted back, while Type Y preferred designs non-darted on both front and back. All somatotypes displayed a preference for semi-wide collars and the color white.

• 대한예방한의학회지
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• 제12권3호
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• pp.9-20
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• 2008

The purpose of this study is to investigate the actual conditions of herbal medicine products for the establishment of drug utilization review system. To accomplish of the purpose, we investigated medical treatment pay of insurance and consumption of herbal medicine products in pharmacy at jeollabuk-do, two oriental hospital etc. To gain valid and reliable the actual conditions of herbal medicine products, it needed close relationship with oriental hospital, society for manufacture of herbal medicines etc and further study classify herbal medicines by Korean Medicine.

• 한국농공학회논문집
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• 제54권2호
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• pp.7-14
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• 2012

To analyze any given situation, it is necessary to have information on elements which affect the situation. Particularly, there is greater variability in both frequency and magnitude of agricultural product prices as they are affected by various unpredictable factors such as weather conditions etc. This is the reason why it is difficult for the farmers to maintain their stable income through agricultural production and marketing. In this research, attempts are made to quantify the entropy of various situations inherent in the price changes so that the stability of farmers' income can be increased. Through this research, we developed an entropy model which can quantify the uncertainties of price changes using the probability distribution of price changes. The model was tested for its significance by comparing its simulation outcomes with actual ranges and standard deviations of price variations of the past using monthly agricultural product prices data. We confirmed that the simulation results reflected the features of the ranges and standard deviations of actual price variations. Also, it is possible for us to predict standard deviations for changed prices which will occur after a certain time using the information entropy obtained from relevant agricultural product price data before the time.

• International Journal of Fluid Machinery and Systems
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• 제6권2호
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• pp.49-55
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• 2013

Water lubricated guide bearing was newly released and has been applied to actual hydro turbines with vertical shaft. As a result, they can have not only high bearing performance but environmental advantages in meeting the demand for reducing river pollution by oil leakage from oil lubricated guide bearing. The PTFE composite guide bearing was tested by experimental equipment operated under conditions similar to those of actual hydro turbines. Circumferential and axial tilting bearing segments help to improve the bearing performance and efficiency due to low friction loss in the bearing system. Furthermore, bearing cooling systems could be eliminated and maintenance periods could be extended, thus the initial investment and operating costs of the hydroelectric power plant are reduced.

• 한국조리학회지
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• 제8권2호
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• pp.77-91
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• 2002

This research was accomplished to prove that the females would be different bakery utilization by their age group and what was the main factor of bakery product at each age group. This subway was examined far 221 females by the self-administerd questionnaire method. The demographic characteristics of research examines showed that the twenties were 77(34.8%), the thirties and the over forties were 72(35.6%) respectively. 55.2% of them graduated a high school and housewives were 35.3%. They normally use the bakery 1 ~ 3 times per week(49.8%), especially they use it in the evening. They responded that the reason of using bakery product was the delicious taste. Twenties bought the bakery product for themselves but the over forties did it for their sons or daughter. The price for one purchasing was usually 2,000~5,000 won. Twenties showed the highest usage of cooked bread with vegetable or ham etc., the thirties liked plain bread but the over forties usually used the bread of sweat taste. Most of them considered the taste as the most important factor when the product was bought especially in twenties. However, the thirties and the over forties also thought the nutrition was important. They also needed the development of new bakery product, especially thirties asked the improvement of service of bakery.

• 한국의류산업학회지
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• 제17권4호
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• pp.626-634
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• 2015

This study analyzes the wearing and purchasing conditions of outdoor jackets by senior men who are over 50s, and examines product sizes of outdoor jackets in the market. A total of 134 questionnaires and sizing systems (or product size) of 10 outdoor brands were used as analytical data. The results were: a high number of senior men enjoyed hiking as an outdoor activity, with most of them following this activity1-3 times per month and as a preferred personal activity for over 5 years. Most needed outdoor wear suitable for these daily life activities. Outdoor wear satisfaction tends to decrease as people age. The major reason for the dissatisfaction with outdoor wear was price. Senior men aged 50s and 60s emphasize design and color when purchasing outdoor wear; however, men in their 70s considered price a priority. Senior men preferred outdoor brands based on a comfortable fit. An investigation on 10 outdoor brands indicated that they had not designated a specific target customer. A comparison of the product size of outdoor jackets with a similar silhouette indicated some deviations among sizes; however, the age of customers was not considered. The human body tends to shrink in stature and increase in girth as a person ages; consequently, we need to reflect body shape changes and senior's size in outdoor wear.

• 한국산업융합학회 논문집
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• 제21권3호
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• pp.141-147
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• 2018

In a time when product development cycles are getting shorter and shorter, many companies are making efforts to develop products with high reliability in a short period of time, accelerated life test is widely used as a method to quickly evaluate reliability. Accelerated life test reduces the test life or the life of the product from the observed data by shortening the lifetime of the product or abruptly lowering the performance under the worse condition than the actual condition in order to shorten the test cost or the test time. In this paper, BL3640A-06P+RB35, DC12V model, which is used in the support device of an automatic rotation type digital signage, which display various information such as textures and images on a display screen in a public place or a commercial space, BLDC motors were subjected to a constant stress test and at the rotational speed of 1rpm, $180^{\circ}$ rotation and reverse rotation under actual use conditions, the stress was imposed on the rotating speed of 2rpm and the weight of the actual installed product from 22.2kgf to 10kgf were installed. The lifetime of the actual use environment condition is 23,545 hours and the rotation speed is accelerated. The life time of the acceleration condition with the additional weight is 1,380 hours. The acceleration factor is calculated as 17.06, the one year guarantee test day is 235 days to 14 days, of the period from 470 days to 28 days, and the third year from 704 days to 42 days. The test date of the BLDC motor was tested on the shortened test date, and the rotational speed and the current value were measured. It is found that there is no defect even if it operates as the test date corresponding to the specified one year warranty period and the 3 year accelerated life test which is experimented. Using the statistical technique of the regression analysis the expected time for the motor to defect to #4 samples was 20 years.