• Journal of Sensor Science and Technology
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• v.5 no.4
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• pp.81-87
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• 1996

This paper presents the optimal design method of SAW filters with arbitrary frequency characteristics. The design program using the unconstrained nonlinear optimization method and FFT algorithm is developed for optimal design of SAW filters with arbitrary frequency characteristics. As a design example, a SAW TV IF filter with asymmetric-amplitude and nonlinear-phase frequency characteristics is designed.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.11a
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• pp.1053-1057
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• 1996

The purpose of this study is to bring out the optimal design factors which effect on dynamic characteristics in the design of proportional flow control valve with fast response characteristics, and to verify the validity of the design factors In this study, force feedback type flow control valve with nozzle-flapper is studied. And, the influences which fixed orifice, nozzle diameter, and maximum displacement between nozzle and flapper effect on dynamic characteristics are analyzed. We have done simulations using the optimal design factors and simulink(Matlab) as a simulation tool, and verified the validity of our simulations by means of comparison our simulation results with an experimental results of another similar valve.

• Journal of the military operations research society of Korea
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• v.25 no.2
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• pp.62-72
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• 1999

Taguchi´s parameter design is to determine the optimal settings of design parameters of a product or a process such that the characteristics of a product exhibit small variabilities around their targer values. His analysis of the problem has focused only on a single characteristic or response. However the quality of most products is seldom defined by a characteristic, and is rather the composite of a great number of characteristics which are often interrelated and nearly always measured in a variety of units. The critical problem in dealing with multiple characteristics is how to compromise the conflict among the selected levels of the design parameters for each individual characteristic. In this paper, Methodology using SN ratio optimized by unvariate technique is proposed and a parameter design procedure to achieve the optimal compromise among several different response variables is developed. One existing case study is solved by the proposed method and the results are compared with ones by the sum of SN ratios, the expected weighted loss, the desirability functions, and EXTOPSIS model.

• Korean Institute of Interior Design Journal
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• no.29
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• pp.163-172
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• 2001

An office is understood as a system consisted of three subsystem : office work, technology and organization. In the age of information, an office is a complicated device in an organization to create, process, modify and deliver various information for organizational goals. The purpose of this study is to provide design guidelines on office workstations based on the analysis of employees' preference and work-style responding to current changes of an organization and work process. Through a literature survey, the study briefly reviewed characteristics of interior design to find changing factors and directions of office interior. Work characteristics in an office are analyzed based on information, activity and communication characteristics while office environment is analyzed based on physical and technological factors. Finally, questionnaire items are derived from a critical comparison between work characteristics and workstation organization(furniture etc) factor. workplace strategies by preference are suggested to increase office productivity, employee satisfaction and to reduce space costs.

• Korean Institute of Interior Design Journal
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• no.37
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• pp.71-79
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• 2003

Architecture is changing rapidly with contact of various cultures and development of modern technology and it is also becoming Polycentric. We can look at the tendency of deconstruction that denies logical rationality of modernism and minimalism that is known as a vertex of modernism. This kind of flow appears to be one of tendencies of interior design. Therefore, to satisfy the residents with the interior design, our study proposes a better space improving monotonousness of the existing apartment through case study. Through the case study, if we analyze the tendency applied to the characteristics of minimalism, we can divide into shape and space. Minimalism space says that the resident can build his/her own space according to the characteristics of the object. Also, it has an advantage of the resident being able to bring in furniture or decoration to change the characteristics of the space. With more accurate understanding and borrowing, we should do multilateral study to research the mixed loading and uncertain minimalism through the case study of apartment space.

• Korean Institute of Interior Design Journal
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• v.17 no.6
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• pp.92-101
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• 2008

In the current age, as the importance of image is increased, brand images are strengthened, and various ways of expressing space are suggested considering the life styles of consumers. Recently, flagship stores are attempting various ways of expressing interior deigns and the flow of life culture, which can maximize the characteristics of image in a large, complex space. Centering on this trend, this study is conducted to explore an objective standard for the stylistic image characteristics reflecting the formative expression trend; to investigate various expression methods of images that are suggested by flagship stores; and to suggest the indicators of design. Based on this background, the formative trend is classified into the expression trends of minimalism and deconstructionism. An image evaluation test was conducted on the selected brand cases by applying the classification, and the following results are obtained from a comparative analysis. In this study, a stylistic analysis of expression methods is suggested from the stylistic image characteristics of each brand as well as from the reliability and validity of the expression trend. It can be concluded that such stylistic image characteristics are important factors in relation with fashion and architecture, and they can be used for differentiating design expression methods.

• International Journal of Naval Architecture and Ocean Engineering
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• v.10 no.4
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• pp.508-519
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• 2018

In order to design the hull form of an underwater vehicle in the conceptual design phase, the dynamic characteristics depending on the hull form parameters should be identified. Course-keeping stability, turning ability, yaw-checking ability, and mission competence are set to be the indices of the dynamic characteristics, and the geometric parameters for the bare hull and rudder are set to be the hull form design parameters. The total sensitivity of the dynamic characteristics with respect to the hull form parameters is calculated by the chain rule of the partial sensitivity of the dynamic characteristics with respect to the hydrodynamic coefficients, and the partial sensitivity of the hydrodynamic coefficients with respect to the hull form parameters. Based on the sensitivity analysis, important hull form parameters are selected, and those optimal values to satisfy the required intercept time of mission competence of a specific underwater vehicle and turning rate are estimated.

• Journal of the Korean Society of Clothing and Textiles
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• v.45 no.1
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• pp.17-27
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• 2021

The pursuit of a healthier life has created life style changes through exercise; in addition, an athleisure look as well as a combination of everyday clothes and sportswear has rapidly spread through sharing based on image-based SNS. Fashion related images shown in an image-based SNS are considered important resources for grasping micro-needs with regard to the sensibility of consumers. Therefore, this study analyzes the design characteristics of an athleisure look shown in image-based SNS. In order to analyze the athleisure look, images of the entire garment were collected and classified to enable content analysis methods that analyzed the design characteristics of each type. As a result, types were classified as sporty-athleisure, modern-athleisure, high-end athleisure, retro-athleisure, and romantic-athleisure. Looking at the characteristics of the athleisure look, it was shown that the design characteristics of each type were well expressed through differences in the direction, material, and details by matching between the items used. This study can be used in design development processes by deriving the characteristics of athleisure looks through an analysis of fashion images that appear in image-based SNS.

• Journal of the Korea Fashion and Costume Design Association
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• v.8 no.3
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• pp.101-111
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• 2006

Jeans fashion in contemporary fashion has various meanings and values, and the importance of it increases. The purpose of this study is to analyze the formative feature characteristics and the aesthetic values of Korean jeans fashion. Fashion photograghs from leading monthly fashion magazines from 2000 to 2005 were analyzed. The types of styles and the formative feature characteristics and the aesthetic values of Korean jeans fashion were studied. The major conclusions of the study are as follows 1. The types of Korean jeans fashion styles were western style, punk style, neo classic style and ethnic style. 2. The characteristics of Korean jeans fashion designs were the varieties in material, color, technique of expression and application. 3. The formative feature characteristics were traditionalism, sexualism, extraordinarily and exhibitionism. Korean jeans fashion has developed creative and decorative designs through various designs and styles. As the activities of the people can be increased in the future, the function and the design of jeans fashion can be developed diversely.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.8 no.1
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• pp.25-32
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• 2012

Korea Hydro & Nuclear Power Co. (KHNP) has developed and implemented the maintenance effectiveness monitoring (MR) programs for the operating nuclear power plants. The MR program is developed by reflecting design characteristics of the operating nuclear power plants to monitor the plant performance for improving the safety and reliability. Recently, KHNP has built a new nuclear power plant, and developed the MR program to establish the advanced maintenance system by reflecting unique design characteristics based on the OPR1000 standard model. So, the MR program developed in this study has another characteristics in comparison with the OPR1000 standard model, and we will verify the suitability of the MR program through evaluating initial performance of the plant. The safety and reliability of the new plant will be improved by developing and implementing the MR program.