• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.423-424
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• 2018

본 작품은 학생들의 캡스톤디자인 작품이다. 본 작품은 역사적으로 존재했던 공룡에 대한 이해와 생명에 대한 존중을 알리기 위한 앱으로, 단조로움을 피하기 위해 게임형식으로 퀴즈를 풀어 공룡관련지식을 얻을 수 있도록 개발하였다. 따라서 본 앱은 공룡알부터 어미가 되는 일대기를 앱으로 표현하고자 하였으며 알에서부터 성장까지 중간중간에 정답을 맞추게 함으로써 공룡알이 시간에 따라 점점 성장하는 형식으로 꾸며졌다. 본 앱의 타겟 사용자인 유아기 어린이들의 생명에 대한 애정과 책임감을 강조하였고, 오락적인 측면을 합친 교육용 게임 어플리케이션이다.

• Bulletin of the Society of Naval Architects of Korea
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• v.17 no.4
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• pp.46-54
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• 1980

The ship structural design problem is formulated as a general nonlinear optimization problem with constraints. Characteristics of the general structural problems and various optimization techniques are discussed, with special emphasis on penalty function method for constrained problems. A simple example of the solution of a midship structure design of cargo vessel, which complies with the rules of the Korean Register of Shipping is shown using SUMT-exterior method with some search methods.

• Proceedings of the IEEK Conference
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• 2003.11c
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• pp.64-67
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• 2003

This paper presents the design of dual-band VCO using PBG structure for IEEE 802.11A/B. By adding switch circuit to the single-band VCO, we could achieve a dual-band VCO. The center frequencies of dual-band VCO are 5.93GHz(-13dBm) and 2.37GHz (3.50dBm). The phase noise is improved about l0dB by using PBG Structure.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.5 no.4
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• pp.74-81
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• 1996

This paper is to estimate sizing design sensitivity of linear and nonlinear vehicle frame structure using structural ananlysis result from ANSYS. Using design sensitivity results, optimal design of plane vehicle frame structure with buckling constraint is carried out the gradient projection method. Optimal design results are compares gradient projection method resrult with SUMT result.

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.5-8
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• 2002

In this paper, we are designed and verified a FFT/IFFT processor that is possible from the wireless LAN environment which is adopted international standard of the IEEE802.11a. The proposed architecture of the FFT/IFFT has Radix-2 64point SDF(single-path delay feedback) Pipeline technique and DIF(Decimation in Frequenct) structure. The FFT/IFFT processor has each 8 bit complex input-output and 6 bit Twiddle factor. we used Max-PlusII for simulation and can see that processor is properly operated

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1574-1575
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• 2007

"Dynamic Neural Unit"(DNU) based upon the topology of a reverberating circuit in a neuronal pool of the central nervous system. In this thesis, we present a genetic DNU-control scheme for unknown nonlinear systems. Our methodis different from those using supervised learning algorithms, such as the backpropagation (BP) algorithm, that needs training information in each step. The contributions of this thesis are the new approach to constructing neural network architecture and its trainin.

• Korean Journal of Materials Research
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• v.7 no.12
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• pp.1089-1096
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• 1997

본 연구에서는 에폭시/산무수물계에 화학양론비(r=산무수물/에폭시)를 0.5, 0.7,0.9,1.1로 변화시켜 서로 다른 두종류의 경화촉진제 1-cyanoethy1-2-ethy1-4-methy1 imidazole(2E4MZ-CN)과 N,N-dimethy1 benzy1 amine(BDMZ)을 첨가한 시료에 대한 경화거동과 경화 후 물성을 관찰하였다. 이 시료의 등온 경화거동은 동역학 측정기(dynamic mechanical analyzer, DMA)와 시차주사 열량분석기(differential scanning calorimeter, DSC)를 이용하여 조사하였다. DMA로부터 구해진 결과를 보면 경화시 상대저장강성을 (relative storage rigidity, RSR)과 상대손실강성율(relative loss rigidity, RSR)과 상대손실강성율(relative loss rigidity, RLR)의 변화가 r값과 경화촉진제의 종류에 영향을 받았다. 그리고 DSC결과는 r값이 감소함에 따라 경화가 촉진되는 것으로 나타났다. 경화물의 성질을 조사하기 위하여 사용된 DMA로부터 얻어진 유리전이온도(glass transition temperature, T$_{g}$)와 가교결합간의 평균분자량(average molecular weigh between crosslinks, M$_{c}$은 사용한 두 경화촉진제에 대하여 r값의 영향이 다르게 나타났다. BDMA의 경우는 T$_{g}$가 1:1화학양론비인 r=0.9에서 최고치를 보였으나, 2E4MZ-CN은 r이 감소함에 따라 계속 증가하는 양상을 보였다. 이와 같은 경향은 2E4MZ-CN을 경화촉진제로 사용하였을 때 에폭시가 과량으로 될수록 잔류 에폭시기들간의 에케르반응이 추가적으로 일어나 M$_{c}$가 감소하기 때문이다.

• Journal of Digital Convergence
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• v.16 no.10
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• pp.415-420
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• 2018

This study focused on the designs for the pulley and electric cables for Hello, the artwork displayed at the Great Hall at the Incheon International AirportTerminal 2. This study presented designs for the pulley and cables, and the parts were applied and tested to analyze their durability and problems. Improvements were made for the final production of the work and three samples were produced respectively for the designs of the pulley and the cables. As are sult, this study found that for the pulley, the most efficient design was to fix the cables at its center. In the case of cables, it was most efficient touse flat cables with a wire in the core. These designs were applied to the artwork Hello, which is currently installed at the Great Hall at the Incheon International Airport Terminal 2. Future research will be conducted to make further improvements to the cable sand the pulley.

• Journal of the Korean Society of Clothing and Textiles
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• v.35 no.11
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• pp.1285-1296
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• 2011

This study examines the effects of fashion and beauty consumption behavior on self-satisfaction. A questionnaire method was used for the study method and the subjects of the study were females in their 20s- 50s. A total of 580 sets of questionnaires were distributed and 554 sets were used for the final analysis; in addition, SPSS 12.0 statistics program was utilized for factor analysis, reliability analysis, correlation analysis, one-way ANOVA, Duncan test and multiple regression analysis. The results of this study were: First, the factors of fashion consumption behavior are composed of physical supplementation, social symbolism, appearance styling, sexuality and conformity and those of beauty involvement consisted of hair styling, skin management, make-up and body shaping. Self-satisfaction was divided into living satisfaction, appearance satisfaction, economic satisfaction and interpersonal relations satisfaction. Second, (because of the examination of the effects of fashion consumption behavior on self-satisfaction) fashion physical supplementation and appearance styling of fashion consumption behavior influenced living satisfaction and interpersonal relations satisfaction for females in their 20s. However, fashion consumption behavior did not influence satisfaction for those in their 30s. It was shown that the social conformity factor of fashion consumption behavior influenced appearance satisfaction of self- satisfaction for those in their 40s and the conformity factor of fashion consumption behavior gave a negative influence on life satisfaction and economic satisfaction of self-satisfaction for those in their 50s. It was found (for beauty consumption behavior) that the body-shaping factor influenced economic satisfaction and interpersonal relations satisfaction of self-satisfaction for all age levels.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1987.10a
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• pp.35-35
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• 1987

Consider a job shop that is modelled as an open queueing network of the Jackson(l957) type. All work stations in the shop have the same number of parallel servers. Two problems are studied : the loading of stations and the assignment of servers, which are represented by loading and assingment vectors, respectively. Ma jorization and arrangement orderings are established to order, respectively, the loading and the assignment vectors. It is shown that reducing the loading vector under ma jorizat ion or increasing the assignment vector under arrangement ordering will reduce the congestion in the shop in terms of reducing the total number of jobs(in the sense of likelihood ratio ordering), the maximum queue length(in the sense of stochastic ordering), and the queue-length vector( in the sense of stochastic majorization). The results can be used to supprot production planning in certain job shops, and to aid the desing of storage capacity. (OPEN QUEUEING NETWORK; WJORIZATION; ARRANGEMENT ORDERINC; LIKELIHOOD RATIO ORDERINC; STOCHASTIC ORDERING)