복소 주파수 성분 처리를 통한 TR-UWB 시스템의 성능분석

장동헌,양훈기,Jang, Dong-Heon,Yang, Hoon-Gee 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.2

본 논문에서는 UWB 펄스 신호를 주파수 성분으로 분리해서 수 MHz정도의 ADC로 디지털 구현이 가능한 새로운 구조의 TR-UWB 시스템의 성능을 수학적으로 분석한 후 기존 시스템과 이론적으로 비교한다. TR-UWB 신호의 주파수 변환 특성 및 복소수 성분들의 평균, 분산 값을 유도하여 이를 활용한 이론적인 SNR 계산을 통해 시스템 성능을 분석하고 SNR 비 관점에서 기존 시스템과의 성능을 비교한다. 모의 실험에서는 AWGN 환경과 IEEE 802.15.3a의 다중경로 채널 환경에서의 BER을 통해 제시한 TR-UWB 시스템의 성능이 기존 시스템보다 우수함을 보인다. This paper, mathematically analyzes the performance of newly proposed TR-UWB system which the frequency components of a UWB pulse were processed so that the system could be implemented with ADCs of a few MHz sampling rate, and presents the comparison with an existing frequency-domain based TR-UWB system. The comparison is mainly based on the SNR ratio which depends on the mean and the variance of the frequency components. We also shows that the simulation results to support the theoretical analysis where the comparison is made under the IEEE 802.15.3a channel model as well as AWGN channel.

도시농업의 경영형태 변화에 관한 연구 - 서울시 농업을 사례로 -

장동헌 ( Dong Heon Jang ),소순열 ( Soon Yeol Soh ) 전북대학교 농업과학기술연구소 2005 농업생명과학연구 Vol.36 No.-

농지전용 주변지역의 주민인식 분석 -봉동읍 4개 리를 중심으로-

장동헌 ( Dong Heon Jang ) 한국농촌계획학회 2014 농촌계획 Vol.20 No.4

This study analyzed the recognition of local residents surrounding farmland conversion area. The details of the survey on the residents included recognition of farmland conversion, the usage and reason of farmland conversion in the surrounding area, impacts of farmland conversion on the local region and agricultural production, and change in farmland prices. According to the analysis, the aging of the local residents progressed, and the ratio of farming population was high in the case study area. There were many warehouse facilities and small scale factories in terms of farmland conversion in the case study area, due to the surrounding area characteristics of industrial complex and relatively cheaper land prices. The farmland conversion affected the local area and residents both positively and negatively, and the surrounding area`s land prices rose. The policy implications, based on the findings in this study, indicate the following need to be carried out: the consolidation of action on farmland pollution upon farmland conversion, review of planned collective conversion mode, and return of the land price hike profits to the affected local area and residents. Actually, farmland conversion should be conducted, after a comprehensive and systematic review, because it affects the local area and residents in a complex way.

전북 식품산업 클러스터의 발전방안 모색

장동헌 ( Dong Heon Jang ) 전북대학교 농업과학기술연구소 2008 농업생명과학연구 Vol.39 No.1

도시내 농촌동의 실태분석에 관한 연구 -전주시를 사례로-

장동헌 ( Dong Heon Jang ),유찬주 ( Chan Ju Yu ),최동칠 ( Domg Chil Choi ),장치진 ( Chi Jin Chang ),김동완 ( Dong Wan Kim ) 전북대학교 농업과학기술연구소 2007 농업생명과학연구 Vol.38 No.-

도시농업의 영농실태와 존속 가능성 모색 : 전주시를 사례로

장동헌(Jang Dong-Heon) 한국지역사회학회 2007 지역사회연구 Vol.15 No.4

In general, urban agriculture refers to agricultural activities in urban and surrounding regions in a wider sense. Also, it encompasses agricultural activities carried out in farming regions close to large consumption areas, in productive greens of urban areas and by civic farms, etc. From this perspective, farming activities in urban regions hold extremely great significance because it serves the role to provide multilateral functions through agriculture including the basic activity of agricultural production. However, despite the positive functions of urban agriculture, farming activities in urban regions are facing difficulties, such as conflict with urban residents and problems associated with safety of agricultural produces, farming water and agricultural labor course, etc. in the process of urbanization. Against such realities, this study intended to examine possibility of urban agriculture continuation in the future through analyzing status of agricultural activities carried out by farmers in urban regions. Also, on the basis of the findings, this study places significance in providing basic data to realize ecologically oriented urban agriculture. In particular, by examining the roles of agriculture in urban regions once again, this study intended to discuss such issues as establishment of new relationship between urban regions and agriculture, increase of added values through expansion of the fields of agriculture and roles of agriculture in relations to urban ecology, etc.

농지전용의 원인과 영향에 관한 연구

장동헌(Jang, Dong-Heon) 한국지역사회학회 2015 지역사회연구 Vol.23 No.2

This study analyzed the status of farmland conversion and the farmland converters" recognition in Wanju-gun. The investigation was made on the characteristics of farmland converters, acquisition type and purpose, conversion procedure, causes and effects on the region. The main details are as follows. As for the main agent of farmland conversion, individuals were more than corporations. The farmland acquisition type was mainly purchase, and the reason of farmland conversion was that conversion was suitable its the purpose. The farmland converters slightly felt inconvenience in terms of conversion procedure, but they were satisfied overall. Such positive impacts as job creation, increase in land prices and local development activation were pointed out. Negative impacts of farmland conversion were decrease in farmland area, the rise of farmland prices and damage to natural environment and landscape. The results of the analysis on the status of farmland conversion and on the recognition can be utilized to provide basic data for farmland conversion and to seek a policy direction.

생물권보전 신청지역의 지역주민 인식분석

장동헌(Jang, Dong-Heon),송춘호(Song, Chun-Ho),유찬주(Yu, Chan-Ju) 한국지역사회학회 2012 지역사회연구 Vol.20 No.4

This study deals with a survey of local residents in the preliminary application area for biosphere reserve on regional revitalization, image improvement, and community participation. The results can be summarized as follows. First, regional resources are highly valued and expected for regional development through promotions of agriculture, forestry, and fishery and ecotourism. Second, conservation and restoration of ecosystem is necessary to improve its image. Third, the biosphere reserve application is expected to provide positive effects on promotion and creation of regional resources. Fourth, local resident participation is highly expected, and thus, it is necessary to form a consultative group in order to facilitate project participation of local residents. According to the local resident survey, liaison and an integrated management system of regional nature, history, and culture are needed. Furthermore, an embodied support system is required for an abiding management.

완주군 생강산업 현황과 농가실태분석

장동헌(Jang, Dong Heon),송춘호(Song, Chun Ho),황재현(Hwang, Jae Hyun) 동국대학교 사회과학연구원 2017 사회과학연구 Vol.24 No.1

이 연구는 조사지역인 완주군의 생강산업 현황을 생산, 가공, 생강이용 및 유통경로를 중심으로 파악하였고, 완주군의 생강 주산지인 봉동읍의 생강재배 농가를 대상으로 실태분석을 실시하였다. 그리고 이러한 현황파악과 실태분석의 결과를 통해 생강산업의 발전을 위한 기초적인 자료를 제공하고자 한다. 생강산업의 현황과 재배농가의 인식실태의 주요 결과를 요약하면 다음과 같다. 첫째, 생강의 유통은 1차 생산물을 중심으로 이루어지고 있으며, 가공은 일부 생산농가에 한정되어 있는 실정이다. 둘째, 생강의 주산지에 설립된 가공업체는 다수 존재하지만, 가공업체 간의 연계성은 미흡하였다. 셋째, 생강재배 농가의 고령화율은 높게 나타났고, 연작피해의 경험이 많았다. 넷째, 조사농가는 토종생강과 개량생강의 이원적 지원을 원하였고, 출하는 특정시기에 집중되어 있었다. 다섯째, 생강의 명품화를 위한 지원 사업으로 연작피해 대책기술지원, 스토리텔링 지원 사업, 생산농가 대상 교육의 실시, 저장 시설의 지원 등을 요구하고 있었다. 이상의 내용을 중심으로 생강산업의 발전을 모색해 보면, 첫째, 생강과 관련된 이해관계자인 생산자조직, 가공업체 그리고 관련요소의 네트워킹을 강화해야 할 것이다. 둘째, 생강의 재배지를 밭에서 논으로 전환하여 연작피해를 줄여야 하며, 고령화에 따른 신규 생산 농가를 육성해야 할 것이다. 셋째, 토종생강과 개량생강의 이원적 육성 정책이 필요하며, 생강의 출하시기를 분산시키기 위한 저장시설 등의 확충이 필요할 것이다. This purpose of the present study is to provide basic data for the development of ginger industry by going through the results of the current state of ginger industry and awareness condition of ginger farms. To do that, we analyzed the current state of ginger industry of Wanju-gun, Korea, focusing on production, processing, utilization and goods distribution channel, and analyzed the awareness condition of ginger farms in Bongdong-eup, where is a major ginger producer of Wanju-gun. These findings are suggested as follows. First, the distribution of ginger processing companies is mainly focused on primary products, and the processed food products are very limited. Second, in the area of case study, there are many ginger related factors such as processing enterprises, but the level of connectivity is not enough. Third, the workforce ages of ginger farmers are high, and they have a lot of experience in repeated cultivation damage. Fourth, most farms ask for dualistic support that is native ginger and improved, moreover the shipment is concentrated on at certain times. Fifth, to prepare damage prevention technology in repeated cultivation, to make a storytelling using ginger related factors, to expand the support businesses, to take effect continuous education, and to support the ginger storage facility, these are the things for brand-name product projects. For a development strategy of the ginger industry based on the contents mentioned above, there are following examples. First, it is necessary to strengthen the networking of producer organizations, ginger processing companies and ginger related factors, which are ginger involved stakeholders. Second, It is necessary to reduce repeated cultivation damage by switching from ginger field cultivation to paddy field cultivation, and to promote new ginger farms associated with aging. Third, it is necessary to dualistic cultivate native ginger and improved and to expand storage facilities to distribute ginger release date.

UWB 기반의 TOA 위치인식 기법

장동헌(Dong-Heon Jang),최유신(You-Shin Choi),양훈기(Hoon-Gee Yang) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.7