• Transactions of the Korean Society for Noise and Vibration Engineering
• /
• v.23 no.1
• /
• pp.56-64
• /
• 2013

Turbulent boundary layer noise is already a significant contributor to sonar self noise. For developing acoustic window of sonar system to reduce self noise, a parametric study of design factors of acoustic window is presented. Distance of sensor array from acoustic window, materials of acoustic window and characteristics of damping layer are studied as design factors to influence in the characteristics of the transfer function of self noise. As the result, these design factors make change the characteristics of transfer function slightly. Among design factors the location of sensor array is most important parameter in the self noise reduction

• Journal of the Korea Fashion and Costume Design Association
• /
• v.16 no.4
• /
• pp.177-188
• /
• 2014

This research is aimed at analyzing the evaluation for the design and satisfaction/unsatisfaction of the autumn and winter school uniform targeting junior students and sophomore students at academical and vocational high schools located in Ulsan, Korea. For this research, SPSS 12.0 was used to measure the frequency and the t-test analysis of 396 data. The results of this study are as follows. The most important factor of autumn-winter school uniforms was heat-retainment. It was showed significant differences between sphere and grade. They also answered body shape' faults and figure emphasis as the most distressed factors. In the design of the school uniform, It was not show significant differences between sphere and grade. They considered the silhouette when they worn the school uniform as the most important factor. The primary factors in purchasing a uniform appeared to be price. Repair experiences after purchasing a school uniform found to count more among students. Examination about transformed parts of uniforms for the students with experiences in uniform modification showed that many students in the academic sphere modified length and width of upper wears, and length of skirt, while many students in the vocational sphere modified waist and hip. Junior grade than sophomore grade appeared to have modified in all parts.

• Transactions of Materials Processing
• /
• v.9 no.4
• /
• pp.339-347
• /
• 2000

For the successful forming of tailored blank, it is important to control the deformation of the stretch flange mode, which is strong1y dependent upon the location of weld line and blank shape. In order to investigate the effects of tailored blank design factors on the stretch flange forming, we made the model die which can simulate stretch flange mode. Taguchi method was employed to analyze the sensitivity of blank design factors for the forming of tailored blank. From the results of experiment S/N ratios were calculated and using Variance Analysis, significance of parameters and optimal condition of each factors were extracted. Based on these analyses, the weld line height and the strength ratio and the arc center height were selected as effective parameter. The analysed result was practically applied for Side outer panel stamping process.

• Proceedings of the SAREK Conference
• /
• 2008.11a
• /
• pp.590-595
• /
• 2008

In this paper, the sensitivity analysis was examined about the main factors that compose an air-conditioning system with slab thermal storage by using the analytic solution. Those factors are the insulation performance of floor slab surface, the slab thickness, the heat capacity of floor slab, the air change rate, and the insulation performance of the wall. The slab thickness and heat capacity of floor slab that minimize heating loads was gained by sensitivity analysis. It is became clear that the insulation performance of slab surface, high airtightness and high heat insulation are important design factors in air conditioning system with slab thermal storage.

• Korean Institute of Interior Design Journal
• /
• v.14 no.1
• /
• pp.151-159
• /
• 2005

The atmosphere of a caf is one of the most important elements for cafe interior design since it is linked directly with profit. As human sensibility ergonomics which is recently signified In various fields is an attempt to quantitatively analyze factors of human sensibility and apply it to design operation, it can be apt for analyzing caf atmosphere. Employing human sensibility ergonomics this study examined issues to be considered for preferred caf interior design. The outcome of this study indicated that the most significant caf design factors are "'style', 'artificiality' and 'enjoyment'. It also suggested a design guideline by evaluating features of each factor. Constructing a successful interior design can be achieved by applying this design guideline.

• Journal of Microbiology and Biotechnology
• /
• v.8 no.1
• /
• pp.81-88
• /
• 1998

The determination of appropriate parameters and parameter conditions is very important for the optimization of production of target materials. Taguchi's method has been used widely as the basis for development trials and optimization during industrial process design. Reaction variables which influence product yield are easily determined and their effects are revealed by just a few reactions, negating the need for extensive experimental investigation. There are usually some factors that are responsible for variations in process characteristics, so called noise factors. Controlling noise factors is very costly and difficult or impossible. Taguchi's experimental design method was examined to determine the control factor's level that is less sensitive to the changes in environmental conditions and other noise factors without control of noise factors. In this study, optimization of lipase-catalyzed production of lysophosphatidic acid (LPA) which has various physiological functions was performed by Taguchi's method. We obtained LPA yields ($66.5\%$) with low variance (5.32) at 400 RPM, molar ratio of 40 : 3 (mol) (fatty acid: G-3-P), 48 h, and $50^{\circ}C$. Thus, bioactive LPA with a desired fatty acid moiety could be produced with high yields and low variance despite various environmental noise factors.

• Journal of Digital Convergence
• /
• v.16 no.11
• /
• pp.167-175
• /
• 2018

By conducting multiple regression analysis, we analyzed the major independent factors affecting user convenience and emotional factors, and identified the important functional elements in the design of the VR device, so that the functional elements to be developed can be grasped in advance. As a result of the study, satisfaction of handling of VR bicycle and satisfaction of speed control by paddling were considered as the most important technical factors as independent factors which have the greatest influence on user convenience and emotional factor among technical satisfaction. Also, it is possible to increase the probabilities of successful design by setting a model that predicts user convenience and the emotional part from the technical factors.

• Journal of Korean Society of Water and Wastewater
• /
• v.32 no.2
• /
• pp.115-122
• /
• 2018

Direct spring loaded pressure relief valve(DSLPRV) is a safety valve to relax surge pressure of the pipeline system. DSLPRV is one of widely used safety valves for its simplicity and efficiency. However, instability of the DSLPRV can caused by various reasons such as insufficient valve volume, natural vibration of the spring, etc. In order to improve reliability of DSLPRV, proper selection of design factors of DSLPRV is important. In this study, methodology for selecting design factors for DSLPRV was proposed. Dynamics of the DSLPRV disk was integrated into conventional 1D surge pressure analysis. Multi-objective genetic algorithm was also used to search optimum design factors for DSLPRV.

• Journal of Digital Convergence
• /
• v.9 no.1
• /
• pp.115-124
• /
• 2011

The property of the mobile phone is taking important role to choose it. In the present situation, exploring, comparing and analyzing the important properties of regular mobile phone(feature phone) and smart phone are very meaningful study. Therefore, the survey was carried out to get the properties of feature phone and smart phone and analyze the difference of those phones. And proposed the important variables for customer satisfaction which must be given priority. The result showed that 'design' and 'Quality' are important to both mobile phone user groups. The problems with mobile phones currently in use were 'poor performance' to feature phone users and 'expensive charge' and 'poor A/S' to smart phone users. Two groups also showed significant difference with the customer satisfactions, and smart phone user group showed higher satisfaction. For smart phone user group, four factors are induced from the properties but 'Hardware Quality' (representing 'call Quality', 'A/S', 'Convenience to use', 'Battery life') and 'Design & Function'(representing 'Internet', 'Convergence Functions', 'Design, 'Color') have significant and positive effects on Customer Satisfaction.

• The Research Journal of the Costume Culture
• /
• v.15 no.5
• /
• pp.888-901
• /
• 2007

The purpose of this study was to examine the differences in clothing selection criteria and store selection criteria between each consumer groups by the preference for fast fashion. The data was collected from a questionnaire conducted on 317 female adults. The results were as follows. First, the factor analysis used to identify clothing selection criteria involved the following four factors: fashion, quality/practicality, status symbol, and economics. The consumer group preferring fast-fashion regarded fashion and economics as important factors and the non-preferring group regarded status symbol factor more. Second, five factors(atmosphere, product service/salesperson, shopping convenience, promotion/facilities) of store selection criteria were constructed by factor analysis, The consumer group preferring fast-fashion regarded atmosphere and product as important factors and the non-preferring group considered service/salesperson and promotion/facilities factors more. Third, the consumers who were of low age, low education, low income and unmarried preferred fast fashion brand.