• 한국항행학회논문지
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• 제21권4호
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• pp.386-393
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• 2017

칩을 개발하는 과정에서 설계된 칩의 검증을 위해 FPGA (field programmable gate array)를 많이 이용한다. FPGA에 다운로드 된 회로를 검증하기 위해서는 FPGA로 데이터를 입력해야 한다. PC와 외부 보드를 통한 칩과의 통신을 위한 많은 방식이 있지만 가장 간단하고 쉬운 방법은 범용 비동기화 송수신기 (UART; universal asynchronous receiver/transmitter)를 이용한 방식이다. 최근 대부분의 회로는 AMBA (advanced microcontroller bus architecture) 버스에 연결되도록 설계되어 있다. 즉, 설계된 회로를 검증하기 위해서는 UART를 거친 후에 AMBA 버스를 통해 데이터를 전달해야 한다. AMBA 버스도 최근에 버전 4.0까지 거치면서 다양한 버전이 존재하는데 간단히 테스트를 하기 위한 용도로는 APB (advanced peripheral bus)가 적합하다. 본 논문에서는 UART-to-APB 인터페이스를 위한 회로를 설계하였다. Verilog HDL을 이용하여 설계된 회로는 Altera Cyclone FPGA에서 구현되었고, 최대 380 MHz의 속도에서 동작이 가능하였다.

• 한국환경과학회지
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• 제11권3호
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• pp.169-176
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• 2002

The purpose of this study is designed to estimate the air quality of subway stations that have the underground platforms in Pusan Metropolitan City, from September to November 2000, over seven times. The subjects include Yonsan-dong station, Somyon station, Pusan station, Nampo-dong station, and Tushil station. The samplings were conducted at three points of each station, i.e. gate, ticket gates, and platforms. The major materials for analysis were CO, NO, NO$_2$, and $O_3$. The experiment was conducted at 7:00 pm with KIMOTO HS-seven Handy sampler and Tedlar Bag of SKC INC(U.S.A). In order to more fully understand station environments, we also measured temperature at each point. The results showed that $O_3$ average concentration at Yonsan-dong station was higher than others with 38~51 ppb. The average concentration of NO was high at ticket gate and platform at Somyon station(119 ppb, 122 ppb), Nampo-dong station(102 ppb, 100 ppb). These results show that the air pollution of stations with underground shopping malls was higher than others. At Somyon station having a junction station, NO and NO$_2$ concentration level of platform-2(noncrowded) was higher than platform-1(crowded). This is most likely due to the accumulation of air pollutants and inadequate ventilation systems.

• 한국조경학회지
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• 제35권3호
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• pp.92-104
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• 2007

This paper aims to discussion the characteristics of location and spatial organization on Hongneung and Yureung(royal tomb) in Namyangju through the interpretation of traditional oriental philosophy including Feng-Shui theory. To do this, we studied in two ways; analysis of the present conditions and photographing research materials about the form of physical structure and review of historical document. The result of analysis in sight of the location and spatial structure was good matched. Main finding of this paper are as follows: The location and landscape structure was characterized by the harmony with natural following traditional thinking and the Korean view of nature, while maintaining the dignity of the King. The spatial organization were placed in a straight line following the hierarchy of metaphysics by order of Neungchim(Tombs Vicinity) - Changmyungdeung(Stone Lantern) - Chungjakak(Pavilion) - Hongsalmun(Gate for Heavenly Gods) and was based on the Confucianism value, the natural contour and inner value. Through this study, we find the principles made it possibles to re-evaluate nature in modem society and provided us with new ways to conserve nature with the help of environmental theory.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.97-100
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• 1997

In order to predict the moldability of a injection molded part, a simulation of filling is needed. Especially when short shot is predicted by CAE simulation in the filling stage, there are mainly three ways to solve the problem. Modification of gate and runner, replacement of plastic resin, and adjustment of process conditions are the main ways. Among them, adjustment of process conditions is the most economic way in the cost and time since the mold doesn\\`t need t be modified at all. But it is difficult to adjust the process conditions appropriately in no times since it requires an empirical knowledge of injection molding. In this paper, a fuzzy neural network(FNN) based upon injection molding process is proposed to evaluate moldability in filling stage and also to solve the problem in case of short shot. An adequate mold temperature is generated through the fuzzy neural network where fill time and melt temperature are taken into considerations because process conditions affect each other.

• 예술인문사회 융합 멀티미디어 논문지
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• 제8권7호
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• pp.719-728
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• 2018

각 나라별로 선호하는 이미지와 효과적으로 전달하는 방법은 다르다. 본 연구에서는 한국의 전통화장 방법과 선호하는 이미지를 효과적으로 전달하기 위한 방법을 찾고자 한다. 조선시대의 고문서 중에서 백과사전 성격의 '규합총서(閨閤叢書)'는 10가지 시조를 통해 그 시대의 선호하는 눈썹을 시조형태로 표현한 '십미요(10 eyebrow poetry)'가 있다. 본 연구에서는 십미요를 적용하고 실제 모델에 제작해 문제 해결을 하고 문헌, 인터넷, 사례의 방법으로 구성되었다. 제작된 모형 자극물은 메이크업 전문가 10인과 70명 남, 녀 블라인드 길거리 실험을 진행하여 호감 및 선호도를 측정 하였다. 결과는 "Gaewon-eoaemi" 유형이 가장 좋아 보이며 이쁘고 매력적이며, 생각하는 눈썹 모양과 현재 유행하는 눈썹 모양과 가장 일치하는 유형이라고 인식 하였다. 고전에 표현되어 있는 다양한 비언어적인 방법으로 본 연구에서는 시각시를 활용하여 효과적으로 전달하기 위한 방법을 알아보았다. 본 연구는 시대별 문화의 흐름에 이해를 돕는 분야를 독료하고 디자인발상 전환에 기여하게 될 것이다.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2002년도 추계학술발표대회 논문집
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• pp.280-283
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• 2002

In the manufacturing of large scale composite structures, the cost-effective processing and the enhancement of structural performance are critical. One of the most effective ways for this purpose is to use stitched multiaxial warp knitted (MWK) perform in the resin transfer molding process. This study reports the effect of stitching on the mechanical properties of MWK composites, and the feasibility processing of the thick U-beam structure utilizing the stitched preforms. Permeability of the preform, viscosity and cure property of the epoxy resin have been measured. The results of resin flow analysis has been used in determining the gate/vent locations of the RTM mold. Cross-sectional observation of the channel beam prototype demonstrated that the resin impregnation was almost complete, except for some surrounding area of stitched yarns.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.205-208
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• 2002

The single phase induction motor(SPIM) with two windings, main and auxiliary winding, is widely used due to ruggedness, low maintenance and simplicity of construction. There are several ways of starting single phase induction motor. The most common method is to use centrifugal switch that is connected in series with a capacitor. But the centrifugal switch that is the external starting system has many problems. In this paper, we use triac to overcome defects that happen by centrifugal switch, Also we used inductor that connected with main winding to get a gate trigger voltage signal. Experiments are focused on a capacitor starling single phase induction motor.

• 한국게임학회 논문지
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• 제13권5호
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• pp.5-18
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• 2013

온라인 게임에서 게임통화의 순환과 관리는 단지 게임 내의 경제 밸런스 유지뿐만 아니라 상용화 게임으로서의 성공 여부를 판가름 짓는 중요한 요소로 인식되고 있다. 그리고 게임 머니의 발생과 흐름은 게임의 컨텐츠와 재미요소, 기획과 레벨 디자인이라는 요소들과도 밀접한 상관관계를 가지고 있다. 본 연구는 이러한 맥락에서 온라인 게임 경제, 특히 게임 통화관리라는 주제에 대해 이론적이고 실무적인 분석을 통해 다각적인 방향으로 접근을 시도했고 그것이 상용화 정책과 매출에 미치는 연관성에 대해서도 살펴보고 있다. 아울러 본 논문은 향후 '게임통화 관리모델'에 대한 다양한 연구와 접근방법의 유용한 토대로서 기여하고자 하며 게임제작과 관리운영에 실리적으로 활용가능한 연구결과를 이끌어 내고자 했다.

• Journal of Semiconductor Engineering
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• 제2권3호
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• pp.136-141
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• 2021

This paper analyzes the tree expansion for multiple-input multiple-output (MIMO) detection in the viewpoint of hardware implementation. The tree expansion is to calculate path metrics of child nodes performed in every visit to a node while traversing the detection tree. Accordingly, the tree-expansion unit (TEU), which is responsible for such a task, has been an essential component in a MIMO detector. Despite the paramount importance, the analyses on the TEUs in the literature are not thorough enough. Accordingly, we further investigate the hardware complexity of the TEUs to suggest a guideline for selection. In this paper, we focus on a pair of major ways to implement the TEU: 1) a full parallel realization; 2) a transformation of the formulae followed by common subexpression elimination (CSE). For a logical comparison, the numbers of multipliers and adders are first enumerated. To evaluate them in a more practical manner, the TEUs are implemented in a 65-nm CMOS process, and their propagation delays, gate counts, and power consumptions were measured explicitly. Considering the target specification of a MIMO system and the implementation results comprehensively, one can choose which architecture to adopt in realizing a detector.

• 패션비즈니스
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• 제25권1호
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• pp.96-107
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• 2021

The purpose of this study was to determine how to visualize classic makeup through Korean visual language in old literature. It provides consumers with creativity to understand and communicate and proposes a new conceptual visualization model. The research method was carried out by drawing from old literature studies, previous reproduction records, examples, and international standard diagram text language expression. First, the visualization work expressed in visual language in old literature was an objective and efficient method of information delivery as a characteristic of information design. Second, visual language expressed in old documents could be divided into makeup materials and actions. Also, the diagrams were appropriate for visualizing materials and materials for storytelling. Third, in the visualization of Korean classic makeup in old literature, images were more appropriate than diagrams in the case of action. The researcher proposed a method of visualizing historical knowledge that went one step beyond the existing simple event timing method. Timeline, correlation diagram, image, and text were combined in various ways to find the most effective historical knowledge visualization method. The representation of Korean classic makeup goes beyond the meaning of language or text and is the cultural content of re-creation, which requires systematic globalization.