• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2003.11a
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• pp.496-500
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• 2003

In This paper, a pole-zero optimized design method for multi-layed planar interdigital stripeline linear group delay bandpass filter with tap input port is presented. As a design example, a four-pole group delay filter with center frequency of 2.14GHz, bandwidth of 160MHz, and group delay variation of ${\pm}0.1nS$ for LTCC technology or multilayerd PCB technology is designed. In the design process, as well the whole structure is not necessary to be simulated, and within three times of optimizing process we have good result as well. This design method could be useful for controlling error correction of manufacturing process as well as design stage.

• Korean Institute of Interior Design Journal
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• v.23 no.4
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• pp.140-148
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• 2014

The objective of this study is to address Effective Learning Methodology by subjects to acquire National Certification which is an essential requirement to get employed. For this purpose, analysis was completed after conducting a survey on the class to obtain Interior Architecture Engineer Certification. 23 applicants were selected based on effectiveness of each subject, level of difficulty, degree of understanding, mentoring effect, self-driven learning, and group discussion. Results are as below. Upon the first written test, Interior Design Theory and Chromatics showed a high learning effectiveness in self-driven learning and mentoring. Ergonomics showed a high learning effectiveness in mentoring, self-driven learning and group discussion while Building Materials, Architecture Construction presented a high effectiveness only in mentoring and group discussion. Architecture Environment showed average learning effectiveness in mentoring and group discussion and showed a low effectiveness in self-driven learning. Upon the second practice test, Interior Architecture Construction and Planning/Management of Construction Materials presented an average learning effectiveness in mentoring and group discussion. Process Control and Adding Up(Supply Calculation) showed a low learning effectiveness in self-driven learning and presented an average to below average learning effectiveness in mentoring and group discussion. Lastly, Interior Design Plan, Interior Design Drawings presented average learning effectiveness in mentoring and group discussion however they showed a high effectiveness in self-driven learning.

• The Journal of Korean Academy of Prosthodontics
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• v.40 no.4
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• pp.352-364
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• 2002

There has been a great interest in the use of titanium for fixed and removable prostheses in recent because of its excellent biocompatibility. However the high melting temperature and chemical reactivity of titanium necessitates casting systems different from those used in conventional casting. The current titanium casting systems are based on an electric-arc design for melting the metal in an argon atmosphere and its exclusive investment. Despite the new developments in Ti casting systems, inadequate mold filling and internal porosity are frequently observed casting defects. Therefore, the study on the fabrication technique including sprue design to solve these casting defects is still necessary. In this study to evaluate the effect of sprue design on the castability of simulated cast titanium crowns, 10 cylindrical cast crowns for each group with four different sprue design(Single group. Double group, Runner bar group. Reservoir group) were fabricated. An impression of the entire casting margin was made and cut at $90^{\circ}$ intervals, and the sections were photographed in a microscope at $100{\times}$ magnification to record marginal discrepancy. The internal porosities of the cast crowns were disclosed by radiographs. Within the limits of this study. the following conclusions were drawn. 1. The overall mean marginal discrepancies for each group were as follows: Double group, $43.65{\mu}m$; Reservoir group, $50.27{\mu}m$; Single group, $54.17{\mu}m$; Runner bar group, $58.90{\mu}m$ (p<0.05). 2. The mean of marginal discrepancies for wax patterns was $10.65{\mu}m$. 3 The numbers of internal porosity showed the most in Runner bar group followed by Single group, Reservoir group, and Double group.

• Fashion & Textile Research Journal
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• v.22 no.3
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• pp.287-295
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• 2020

This study examined body perception, body design behavior and clothing style for women in their 20s according to the period of body design experience. Body perception was analyzed from the two viewpoints of seeing the body as the subject of social suppression and as the means of self-expression. This could lead to understanding how modern women perceive their bodies based on experiences of body design. In-depth Interviews conducted through semi-structured questionnaires among women in their 20s were divided into body design experience less than 24 months and the group of body design experience more than 24 months. The results of this study are as follows. First, both groups did not feel satisfaction in terms of body perception. Women in the less than 24 months group showed their eager for firm body as well as skinny body influenced by social media, while the group with more than 24 months, felt a strong suppression to have a perfect body as a professional due to the expectations of others. Second, the group with less than 24 months conducted body designs to satisfy themselves, while group with more than 24 months focused on the body shape changes through systematic exercise and a strict diet plan that indicated a strong desire to show their perfect body to others. Third, the two groups showed differences in their clothing style.

• Journal of the Korean Society of Clothing and Textiles
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• v.41 no.4
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• pp.615-632
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• 2017

This study conducted a wearing evaluation of fall impact protective clothing developed in the previous study that evaluated activity, appearance, and practicality for elderly women. A total of 6 kinds of pants, which consisted of the three kinds of pads and two kinds of designs, were evaluated and the results are as follows. First, the activity of the protective clothing was tested with six women in their 60's and scored highly in most criterions that indicated satisfactory activity. The honeycomb type pad was superior in four of ten criterions for the activity evaluation results by pad types. Design B without a knee pad was evaluated as more comfortable on two motions that put pressure on the knee area. Second, the expert group considered design A to be better than design B, while the subject group preferred design B over design A in design appearance evaluation. Both the subject group and expert group evaluated that design A is better than design B in consideration of pads. Third, in the assessment of practicability, both the expert group and the subject group provided the highest score on the question of if elderly women needed protective clothing. The evaluation of washing ability indicated no noticeable change in the clothing form and size before and after washing.

• Proceedings of the Korean Geotechical Society Conference
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• 2009.09a
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• pp.923-932
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• 2009

Generally most of pile foundations are constructed with group pile rather than single pile. The study on efficiency and bearing capacity which are major elements for rational design of this group pile has been actively progressed, whereas there are truly only a few studies of negative skin friction working on group pile due to the consolidation of ground. The purpose of this study is to determine, among the elements of negative skin friction applied to pile, the occurrence modality of negative skin friction at center, side, and corner of $3{\times}3$ group pile using model test and, based on those observations, to propose the effective design direction of group pile.

• Nuclear Engineering and Technology
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• v.55 no.10
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• pp.3648-3658
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• 2023

The early localization of a fuel subassembly with a failed (wet rupture) fuel pin is very important in reactors to limit the associated radiological and operational consequences. This requires a fast and reliable system for failure detection and their localization in the core. In the Prototype Fast Breeder Reactor, the system specially designed for this purpose is Failed Fuel Location Modules (FFLM) housed in the control plug region. It identifies a failed sub-assembly by detecting the presence of delayed neutrons in the sodium from a failed sub-assembly. During the commissioning phase of PFBR, it is mandatory to demonstrate the FFLM effectiveness. The paper highlights the engineering and physics design aspects of FFLM and the integrated simulation towards its function demonstration with a source assembly containing a perforated metallic fuel pin. This test pin mimics a MOX pin of 1 cm² of geometrical defect area. At 10% power and 20% sodium flow rate, the counts rate in the BCCs of FFLM system range from 75 cps to 145 cps depending upon the position of DN source assembly. The model developed for the counts simulation is applicable to both metal and MOX pins with proper values of k-factor and escape coefficient.

• Korean Journal of Human Ecology
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• v.15 no.2
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• pp.353-362
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• 2006

The purpose of this study is to develop a group counseling program for career exploration and to explore its effects on college students' self-efficacy. Main program activities consisted of 8-week sessions. Equivalent control group pretest-posttest design was employed for this study. 40 college students voluntarily participated in a group counseling of career exploration. Another 40 students were selected for a control group of this study design. The self-efficacy (23 items) was administered to both the experimental and the control groups before and after the 8-week treatments. The results of this research showed that the differences (program effects) of the experimental group in the scale were higher than those of the control group. In conclusion, a group counseling program for the career exploration had significant effects on the career exploration and self-efficacy of college students.

• Journal of Service Research and Studies
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• v.13 no.3
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• pp.160-171
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• 2023

The importance of design utilization as a method for establishing policies and services in the public sector is increasing. Accordingly, Korea has introduced a public service design development method and has implemented and operated a national design group for consumer-centered policy development since 2014. This study analyzes the cases of the National Design Group to expand the use of design in the public sector and propose sustainable public service design strategies. The time range of this study is from 2014 to 2021, when the National Design Group was implemented, and the content is limited to tasks that can be found on the Gwanghwamun 1st Street website and the National Design Group casebook. This study was conducted as follows. First, we looked for implications for how to use and identify the role of design in the public policy development stage by referring to the literature on design policy and public service design, and second, based on major implications, we analyzed the task name and contents. Based on literature studies and case studies, we found implications that design can be used in various public fields, and the policy implications proposed to expand the use of sustainable design in the public sector are as follows. First, by raising awareness of service design in public policies and services, it continues to provide opportunities for the use of design to expand as a role that leads to voluntary behavioral changes of citizens beyond civic participation. Second, more active publicity is needed for the successful cases of the National Design Group, a product of the active use of public service design. Third, a more specific evaluation system should be introduced to verify the effectiveness and effectiveness of public service design. Through this, it is expected that it will greatly contribute to reducing the error in policy delivery and realizing citizen-centered public services by utilizing design for various problems facing our society.

• Journal of the Korean Home Economics Association
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• v.48 no.6
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• pp.1-8
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• 2010

The purpose of this study is to classify body type by BMI and to inquire about body satisfaction and fitness apparel depending on body type among women 20-50years of age. As a result, body types are classified into three groups: lean, normal, and obese figures. On front silhouette, the normal type occupies most in women belonged to lean figure group, the obese lower part of the bodytype in normal figure group, and the obese upper part of the body type in obese figure group. On the other, in side silhouette, the slender type is prevalent in lean figure group, hip obesity in normal figure group, and trunk obesity in obese figure group. In particular, women in the obese figure group were distributed among the various body types. The obese figure group had a lower fitness apparel in the measurement of circumference(e.g., chest, waist, and hip) related to obesity in comparison with measurement of length. Therefore, the development of an optimal sizing system in response to the various body types in the obese figure group is needed to provide more diversity in aesthetic design and continuity among various sizing systems.