• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.8
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• pp.60-64
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• 2007

In this paper, we designed FFT for European DTV and implemented system with Stratix EP1S25F672C6 FPGA At the implemented FFT, we used SIC architecture. SIC architecture is composed of algorithm-specific processing element, RAM memory, registers, and a central or distributed control unit. Designed FFT was acceptable either 2K or 8K point FFT processing, and is selectable guard interval such as 1/4, 1/8, 1/16, 1/32. Consequently, it was suitable for the standard of DVB-T(Digital Terrestrial Video Transmission System) specification. It resulted in 12% of total logic gate and 53% of total memory bit in Stratix device.

• Korean Institute of Interior Design Journal
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• no.25
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• pp.198-204
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• 2000

Art Nouveau was a short-lived European phenomenon in art and architecture. Despite the fact that Art Nouveau architecture never fully succeeded as an anti-historical movement, it is important to identify its place in modern architectural historiography. The significance of Art Nouveau-that it incorporated decorative elements into the centre of architectural practice-certainly serves to acknowledge its place within the Modern Movement. Architectural works of Victor Horta, Hector Guimard and Charles Rennie Mackintosh are carefully examined in this paper to find out (1) how they individually emerged and manifested distinctive characteristics and creativity within their own local contexts, and (2) how they can collectively fit into historical discourse of Art Nouveau. Art Nouveau was not a mere fin-de-ci cle phenomenon, but a complicated transient phase at the dawn of European Modernism.

• Journal of the Korean Institute of Landscape Architecture
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• v.26 no.2
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• pp.259-268
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• 1998

This study was carried out to evaluate the effect of open space on temperature chang. In open space, lower temperature zones were formed, while high temperature zones were developed around urban areas. In forests and on water within open space, marked temperature reduction was recorded. The 10 % increase of the ratio of green space within fifty meters around the observation point decreased 0.33~0.43$^{\circ}C$ from the maximum temperature and 0.20~0.$25^{\circ}C$ from the minimum temperature. The increase of ten trees in the area decreased 0.33~0.49$^{\circ}C$ from the maximum temperature and 0.20~0.23$^{\circ}C$ from the minimum temperature.

• Journal of the Korean Institute of Rural Architecture
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• v.6 no.3
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• pp.39-48
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• 2004

The purpose of this study is to clarify the actual conditions of the plan composition of expressway service facilities. This study investigated the characteristics of both indoor space and outdoor space of 15 service facilities, and then analyzed attributes of users by the plan type along with their perception on the facility usage. The results of this study are summarized as follows; 1) When analyzing the attributes of expressway service facilities users, 36% respondents said that they used the expressway service facilities just to rest. The average distance of using the service plaza was found to be approximately 67km. 2) In terms of the indoor space of the expressway service facilities, as basic patterns, B(R+C+T)-type(53%), A(C+R+T)-type(40%), C(C+T+R)-type(7%) were found in order, all the service facilities need to expand them.

• Journal of the Korean Institute of Landscape Architecture
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• v.43 no.4
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• pp.37-49
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• 2015

The goal of this research is to examine air temperature changes according to tree type, plantation type, roadside green area structure, and green volume of street green area within a city. The plantation type that could be analyzed for comparison by tree type with over 3 species was 1 rows of tree+shrubs. The results of analysis of average air temperature difference between pedestrian and car streets vis-a-vis 1 row of tree+shrub in high air temperature areas were: Pinus densiflora, $1.35^{\circ}C$; Zelkova serrata, $1.84^{\circ}C$; Ginkgo biloba, $2.00^{\circ}C$; Platanus occidentalis, $2.57^{\circ}C$. This standard large wide canopy species was analyzed by the roadside to provide shade to have a significant impact on air temperature reduction. In terms of analysis of the relationship between plantation type of roadside trees and air temperature, the average air temperature difference for 1 row of tree type was $1.80^{\circ}C$; for 2 rows of trees it was $2.15^{\circ}C$. In terms of analysis of the relationship between the roadside green area structure and air temperature, for tree type, average air temperature $1.94^{\circ}C$: for tree+shrub type, average air temperature $2.49^{\circ}C$; for tree+mid-size tree+shrub type, average air temperature $2.57^{\circ}C$. That is, air temperature reduction was more effective in a multi-layer structure than a single layer structure. In the relationship analysis of green volume and air temperature reduction, the air temperature reduction effect was enlarged as there was a large amount of green volume. There was a relationship with the green volume of the road, the size of the tree and number of tree layers and a multi-layer structured form of planting. The canopy volume was large and there were a great number of rows of the tree layer and the plantation type of multi-layer structure, which is what is meant through a relationship with the green volume along the roadside. Green composition standards for air temperature reduction effects and functional improvement were proposed based on the result. For a pedestrian street width of 3m or less in the field being ideal, deciduous broadleaf trees in which the canopy volume is small and the structure of the tree+shrub type through the greatest 1m green bend were proposed. For a pedestrian street width of over 3m, deciduous broadleaf trees in which the canopy volume is large and is multi-layer planted with green bend over 1m, tree+mid-size tree+shrub type was proposed.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.56 no.3
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• pp.255-263
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• 2011

Projected increases in atmospheric $CO_2$ concentration ([$CO_2$]) and temperature ($T_a$) have the potential to alter in rice growth and yield. However, little is known about whether $T_a$ warming with elevated [$CO_2$] modify plant architecture. To better understand the vertical profiles of leaf area index (LAI) and the flag leaf morphology of rice grown under elevated $T_a$ and [$CO_2$], we conducted a temperature gradient field chamber (TGC) experiment at Gwangju, Korea. Rice (Oryza sativa L. cv. Dongjin1ho) was grown at two [$CO_2$] [386 (ambient) vs 592 ppmV (elevated)] and three $T_a$ regimes [26.8 ($\approx$ambient), 28.1 and $29.8^{\circ}C$] in six independent field TGCs. While elevated $T_a$ did not alter total LAI, elevated [$CO_2$] tended to reduce (c. 6.6%) the LAI. At a given canopy layer, the LAI was affected neither by elevated [$CO_2$] nor by elevated $T_a$, allocating the largest LAI in the middle part of the canopy. However, the fraction of LAI distributed in a higher and in a lower layer was strongly affected by elevated $T_a$; on average, the LAI distributed in the 75-90 cm (and 45-60 cm) layer of total LAI was 9.4% (and 35.0%), 18.8% (25.9%) and 18.6% (29.2%) in ambient $T_a$, $1.3^{\circ}C$ and $3.0^{\circ}C$ above ambient $T_a$, respectively. Most of the parameters related to flag leaf morphology was negated with elevated [$CO_2$]; there were about 12%, 5%, 7.5%, 15% and 21% decreases in length (L), width (W), L:W ratio, area and mass of the flag leaf, respectively, at elevated [$CO_2$]. However, the negative effect of elevated [$CO_2$] was offset to some extent by $T_a$ warming. All modifications observed were directly or indirectly associated with either stimulated leaf expansion or crop phenology under $T_a$ warming with elevated [$CO_2$]. We conclude that plant architecture and flag leaf morphology of rice can be modified both by $T_a$ warming and elevated [$CO_2$] via altering crop phenology and the extent of leaf expansion.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.658-660
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• 2004

소프트웨어 개발기술의 발달에 따라 컴포넌트 기반 개발 기법은 객체지향기법에서의 새로운 대안으로 제시되어왔다. 그러나 웹 기반 시스템의 개발은 설러 가지 요인으로 인하여 현재까지 소프트웨어 컴포넌트 도입의 초기단계에 머물고 있다. 본 연구에서는 컴포넌트 개발 기법을 이용한 웹 기반 성적처리 시스템을 구현하였다. 대상 하부 컴포넌트는 Java Beans로 구현하였으며, 컴포넌트 합성명세로는 C2 아키텍처 스타일 기법을 이용하였다. 이러한 결과로서 웹 기반 교육 시스템 분에의 개발에서 소프트웨어 컴포넌트 적용 일 운용에 관한 효율성을 보일 수 있었다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.373-375
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• 2001

소프트웨어를 아키텍쳐 수준에서 정확하고 엄밀하게 설계, 분석하는 것이 점차 중요해짐에 따라 사용이 쉬우면서 기술적으로 성숙된 아키텍쳐 기술언어(ADL Architecture Description Language)의 필요성이 커지고 있다. 본 논문에서는 컴포넌트 기반의 도메인 아키텍쳐 모델링 시 C2 스타일의 아키텍쳐 기술을 지원하는 ADL을 정의한다. 본 논문에서 정의한 ADL은 자바(Java)와 유사한 구문으로 컴포넌트 명세와 아키텍쳐 명세를 분리하여 기술할 수 있는 표기 형식을 제공한다.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.35C no.4
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• pp.50-59
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• 1998

This paper describes a 3.3V 8bit CMOS digital to analog converter (DAC) with two state current cell metrix architecture which consists of a 4 MSB and a 4 LSB current matrix stage. The symmetric two stage current cell matrix architecture allow the designed DAC to reduce hot only a complexity of decoding logics, but also a number of wider swing cascode curent mirros. The designed DAC with an active chip area of 0.8 mm$_{2}$ is fabricated by a 0.8 .mu.m CMOS n-well standard digital process. The experimental data shows that the rise/fall time, the settling time, and INL/DNL are6ns, 15ns, and a less than .+-.0.8/.+-.0.75 LB, respectively. The designed DAC is fully operational for the power supply down to 2.0V, such that the DAC is suitable for a low voltage and a low power system application. The power dissipation of the DAC with a single power supply of 3.3V is measured to be 34.5mW.

• Journal of Korea Multimedia Society
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• v.10 no.12
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• pp.1585-1590
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• 2007

This paper introduces adaptive PRML (Partial Response Maximum Likelihood) architecture with PR (a,b,c,d,e) channel type for the improved readability of high-density optical discs with capacity greater than 30GB. The proposed PRML architecture consists of an adaptive equalizer, a Viterbi detector and a channel identifier. Detailed description for each component is included. The architecture is implemented in chip and also confirmed its performance on the test board mounting the chip. Test results show that the proposed 5-tap PRML architecture is well operated, and less than $2{\times}10^{-4}$ of BER (Bit Error Rate) is achieved with radial and tangential tilt margin of ${\pm}0.6^{\circ}$ on self-made 30GB BD at 1x speed.