• Advances in Computational Design
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• v.3 no.4
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• pp.385-404
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• 2018

The study investigated an area of sustainable structural design that is often overlooked in practical engineering applications. Specifically, a novel method to simultaneously optimise the cost and embodied carbon performance of steel building structures was explored in this paper. To achieve this, a parametric design model was developed to analyse code compliant structural configurations based on project specific constraints and rigorous testing of various steel beam sections, floor construction typologies (precast or composite) and column layouts that could not be performed manually by engineering practitioners. Detailed objective functions were embedded in the model to compute the cost and life cycle carbon emissions of the different material types used in the structure. Results from a comparative numerical analysis of a real case study illustrated that the proposed optimisation approach could guide structural engineers towards areas of the solution space with realistic design configurations, enabling them to effectively evaluate trade-offs between cost and carbon performance. This significant contribution implied that the optimisation model could reduce the time required for the design and analysis of multiple structural configurations especially during the early stages of a project. Overall, the paper suggested that the deployment of automated design procedures can enhance the quality as well as the efficiency of the optimisation analysis.

• Proceedings of the IEEK Conference
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• 2002.06b
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• pp.181-184
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• 2002

본 논문에서는 600Hz 무선 LAN 시스템에 탑재를 위한 600㎓ 대역 전력증폭기 모듈을 개발 하였다. 600㎓ 대역 전력증폭기 모듈에 실장된 600㎓ 대역 전력증폭기 MMIC는 ETRI에서 설계 및 제작한 것으로 칩의 크기는 2.80 × 1.75㎟이며, on-wafer측정을 하여 얻은 결과는 동작 주파수 58~620Hz에서 소신호 이득은 12.4dB이고, 최대 소신호 이득은 59~60G보z에서 ISdB이며, 출력전력(Pldn)은 16.3~16.7dBm을 얻었다. 이와 같은 특성을 갖는 전력증폭기 MMIC를 사용하여 모듈을 제작하였으며, RF feed line을 위해 Rogers 사의 R03003 기판을 사용하였다. 모듈의 입출력은 동작 주파수 대역에 적합한 WRl5라는 waveguide 형태를 사용하였고, DC 바이어스 공급을 위해 3.5㎜ K-connector를 사용하였다 제작한 모듈의 크기는 40 × 30 × 15㎣이며, 최적의 성능을 얻고자 tuning bar를 상하로 이동하여 최적점을 찾았으며 나사로 고정하여 상태를 유지하도록 하였다. DC 바이어스 및 RF feed line과 칩의 연결은 본딩에 의한 인덕턴스를 최소화하기 위하여 3mil 두께의 리본 본딩을 하였다 전력증폭기 모듈을 측정한 결과, 동작주파수 600㎓ 대에서 소신호 이득은 6dB 이상, 입력 정합은 -lOdB 이하, 출력 정합은 -4dB 이하로 측정되었긴, 출력전력은 SdBm 이상으로 측정되었다. 동국대에서 제작한 600Hz 무선 LAN 시스템에 전력증폭기 모듈을 시스템 송신부에 탑재 시험한 결과, 동영상을 실시간으로 전송하는데 성공하였다.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.1
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• pp.63.3-63.3
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• 2018

A comparison study between two low temperature opacity tables has been conducted. The opacity is the one of the major input physics in stellar model construction. Opacity is generally provided in a tabular form and as a function of 3 parameters, ie, density, temperature and chemical composition. Among available opacity tables, it has been common practice to utilize OPAL opacity table (Iglesias & Rogers, 1996) augmented with Ferguson opacity table (Ferguson et al. 2005) for the low temperature domain. For low temperature domain, another table, AESOPUS (Marigo & Aringer, 2009), has been announced in 2007. Reportedly, this opacity covers even lower temperature region, and is compatible with that of Ferguson in the overlapping temperature domain. To test the compatibility, stellar models and isochrones for various ranges in mass, metallicity and chemical composition, have been constructed. It is confirmed that there is no significant difference in the stellar models and isochrones constructed with the two different low temperature opacities. Therefore, in the construction of stellar models and isochrones, Ferguson low temperature opacity can be replaced with the AESOPUS opacity. The wider range in the temperature and chemical mixtures, and the easier accessibility make AESOPUS favorable in practical purpose.

• Journal of the Korean Society of Costume
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• v.32
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• pp.183-200
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• 1997

The purpose of this study was to find out the mutual relations of self-efficacy proximity of cosmetic to self and proximity of clothing to self. The researcher used the scale of Sherer Mercadante Maddux Rrentice-Dunn Jacobs and Rogers(1982) for a general and social self-efficacy. The scale of Ryckman Roddins Thorton and Cantrell(1982) for a physical self-efficacy. The researcher corrected and supplemented the tools on the basis of Sontag(1987)'s scale for proximity of clothing to self. The researcher developed proximity of cos-metic to self. The subjects of this study were 172 girl students in the university. The research was analyzed by MANOVA Scheff post hoc test and Cronback a. The Results of this study were as follows: 1. The person who had a higher self-efficacy was higher in the hoy and skin-carve in the sub-causes of proximity of cosmetic to self. There was no difference in social-confidence self-satisfaction and disguise. 2. The person who had a higher self-efficacy was high in the self-expression and the physi-cal satisfaction in the sub-causes of proximity of clothing to self. There was no difference in the joy self-consciousness the consciousness of others and the novelity. 3. The person who had a higher proximity of cosmetic to self was higher in the joy, self-ex-pression and self-consciousness of others and the novelity. There was no difference in the physical satisfaction.

• Journal of Information Technology Services
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• v.13 no.3
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• pp.25-50
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• 2014

The purpose of this study is to examine factors affecting the diffusion and the intention to use, and how these factors differ among adopter categories. A survey was done to analyze the diffusion of smart-phone, the most popular and innovative product nowdays. We collected 197 survey questionnaires from smart-phone user and analyzed the data using SPSS 18.0 and Smart PLS 2.0. PLS (Partial Least Square) analysis was implemented before multiple group-innovator, early adopter, eraly majority- analysis which is categoriezed by Innovation Diffusion Model of Rogers (1995). The results show that firstly, in innovator group (n=63), the functional and the safety value have significantly positive effect on user satisfaction. In addition, we found that user satisfaction and the brand loyalty are significatly associated with the intention of use. Secondly, in early adopter group (n = 67), the design value has significantly positive effect on user satisfaction and it has significantly positive effect on brand loyalty. Finally, in early majority group (n = 67), the design value has significantly positive effect on the user satisfaction and it has stronger effect on the intention of use and brand loyalty. We conclude this paper with the implication of this study to both academia, business practice, and policy making.

• Journal of Veterinary Clinics
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• v.23 no.2
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• pp.180-182
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• 2006

One male Arabian horse, 5-year-old, reared in Gort, Co Galway, Ireland was diagnosed as conjunctivitis. Acupuncture and aquapuncture with dexamethasone were done at BL01, BL02 and ST01, twice a week, and oculo-acupuncture was done into Shangjiao area using with oculo-acupuncture needle for human use. At session 3, there were no lacrimation, ocular discharge and hyperemia in the eye. The present patient was a case with equine conjunctivitis which showed favorable therapeutic response by acupuncture treatment.

• International Journal of Automotive Technology
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• v.3 no.1
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• pp.1-8
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• 2002

There is Increasing world-wide interest in diesel particulate filters (DPF) because of their proven effectiveness in reducing exhaust smoke and particulate emissions. Fine particulates have been linked to human health . DPF use requires a means to secure the bum-out of the accumulated soot, a process called regeneration. If this is not achieved, the engine cannot continue to operate. A number of techniques are available, but most are complex, expensive or have a high electrical demand. The use of fuel additives to catalyse soot bum-out potentially solves the problem of securing regeneration reliably and at low cost. Work on organo-metallic fuel additives has shown that certain metals combine to glove exceptional regeneration performance. Best performance was achieved with a combination of iron and strontium based compounds. Tests were carried out un a bed engine and on road vehicles, which demonstrated effective and reliable regeneration from a tow dose fuel additive, using a single passive DPF. No control valves, flow diverters. heaters or other devices were employed to assist regeneration. Independent particle size measurements showed that there were no harmful side effects from the use of the iron-strontium fuel additive.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.9
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• pp.2253-2265
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• 2012

A novel folded dipole type microstrip patch antenna designed for ultrahigh frequency (UHF) band radio frequency identification (RFID) tag is presented in this paper, which can be used on the metallic objects. The presented antenna is fabricated on a very thin Rogers 5880 substrate with a thickness of 0.508 mm. The structure consists of two folded dipole and two symmetrical shorting pins placed at both sides of feed point. An adjustable frequency response can be easy obtained via modify the location and radius of the shorting pins. The antenna has been analyzed by full wave simulations soft. The simulated bandwidth is about 67.2 MHz, which covers the Europe and North America UHF RFID frequency range. A manufactured prototype has been fabricated and measured to demonstrate the antenna performances. The simulation results agree with the measurement data well. The measured maximum reading range of the prototype can be reached 4.1 m in free space, and 3.2 m on a metal plate whose size is $150{\times}150{\times}8mm^3$.

• Journal of Veterinary Clinics
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• v.23 no.1
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• pp.6-8
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• 2006

One male Arabian horse, 13-year-old reared in Galway, Ireland, was diagnosed as laminitis. Hemo-acupuncture at TH01, SI01 and ST45 was used. Injection acupuncture with dexamethasone was also applied at the same acupoints after homo-acupuncture twice a week. Bee-venom was injected into GV01 at session 2. After session 3, the patient showed almost normal walking.

• Journal of Distribution Science
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• v.16 no.8
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• pp.15-27
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• 2018

Purpose - The purpose of the study is to examine the relationships among the following retail operations variables: retail store operations (i.e., store management, sales personnel, promotion of merchandise), success of assortment planning, firm performance (i.e., market share, overall competitive position, profitability, product quality, consumer satisfaction), and retail buyer's demographics and firm's characteristics. Research design, data, and methodology - After conducting a pilot test, the survey was conducted in Seoul, South Korea. With using the listwise deletion method, 378 usable data sets were analyzed. For data analysis, descriptive statistics, factor analysis, and Structural Equation Modeling (SEM) methods were employed. Results - As evidenced from the path diagram, the relationship between retail store operations and the success of assortment planning is strong and significant. Retail store operations affect firm performance, though at a weaker significance than it affects the success of assortment planning. The relationship between the success of assortment planning and firm performance, is the strongest relationship observed by this research. Conclusions - The findings of this empirical study contribute to the retail/fashion buying/management field by confirming (a) the importance of assortment planning for retail firm performance and (b) the role of store operations for successful assortment planning and firm performance for fashion retailers.