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.

논문 : 서비스 품질이 고객만족, 이미지와 구전의도 및 재이용의도에 미치는 영향 연구-NH농협은행 이용자를 중심으로-

장동헌 ( Dong Heon Jang ),송춘호 ( Chun Ho Song ),백승우 ( Seung Woo Baek ) 명지대학교 금융지식연구소 2015 금융지식연구 Vol.13 No.2

이 연구는 NH농협은행의 이용자를 대상으로 서비스 품질이 고객만족과 이미지, 구전의도 와 재이용의도에 미치는 영향을 규명하였다. 분석결과, 서비스 품질이 고객만족에 긍정적인 영향을 미치는 것은 유형성, 확신성, 공감성이며, 서비스 품질이 농협 이미지에 영향을 주는 요인은 유형성, 신뢰성이었다. 그리고 고객만족은 농협의 이미지에 긍정적인 영향을 주었을 뿐만 아니라, 구전의도에도 긍정적인 영향을 주었다. 또한 농협의 이미지는 구전의도와 재이용의도에 긍정적인 영향을 미치는 것으로 분석되었다. 이러한 연구결과는 경쟁이 심화되고 있는 금융시장에서 차별화 할 수 있는 마케팅적인 시사점을 주고 있다. This study identified the effects of service quality on customer satisfaction and image and the intentions of word-of-mouth and reuse, targeting the users of NH Bank. The analysis result showed that the positive influential factors of service quality on customer satisfaction included tangibles, assurance and empathy while the most influential factors on the image of the bank were tangibles and assurance. Also, customer satisfaction had a positive impact on the image of NH Bank, which in turn positively influenced the intention of word-of-mouth. It was also analyzed that the image of the bank had a positive impact on the intentions of word-of-mouth and reuse. Such results may suggest marketing implications that may differentiate services in the financial market, where there is an intensifying competition.

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.

주파수 영역에서 채널 특성을 고려한 IR-UWB 수신기

장동헌(Dongheon Jang),최호선(Hoseon Choi),양훈기(Hoongee Yang) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

In this paper, we present a frequency-domain based UWB receiver which estimates the multipath channel and demodulates a received signal by compensating the channel characteristic. We show the proposed system implements a matched filter receiver, which can maximize the output SNR. From the simulation results, we verify the proposed system excels a non-matched type system in performance.

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.-

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.

지방자치단체의 귀농관련 자치법규의 비교 분석 : 귀농의 조례 및 규칙을 중심으로

장동헌(Jang Dong-Heon) 한국지역사회학회 2009 지역사회연구 Vol.17 No.3

This research aims to provide basic data in order to promote a return-to-the-soil movement by reviewing the actual conditions of those returning to the farm and analysis of ordinances and regulations of local self-governments related with the issue. The major contents include governmental support to those who returned to the farm and settled down in a rural community, diversification of farming for stable income, practical financial aids by local seif-governments, concrete plans for financial support, varying assistance plans, and so on. Those efforts are expected to bring new drive for growth to the agricultural and rural communities.

도시농업의 인식 및 가치평가에 관한 연구 : 전주시 도시민을 사례로

장동헌(Jang Dong-Heon),소순열(Soh Soon-Yeol),유찬주(Yu Chan-Ju) 한국지역사회학회 2006 지역사회연구 Vol.14 No.3

This study considered urban agriculture as an object to be consistently maintained and conserved rather than transient or residual one and approached the urban agriculture from the point of view that regards it as one of local agriculture. In particular, this study estimated the recognition on agriculture of urban residents and the willingness to pay for the purpose of agricultural conservation. Main results can be put in order as follows; First, as for the value of urban agriculture, urban residents gave precedence to the provision of the landscape green zone. And urban residents gave the next precedence to the inheritance value for the next generation. Second, the recognition on conserving the urban agriculture is as follows; In terms of the recognition, the response that should use urban agriculture as other uses through external expansion was higher than the response that should use urban agriculture as a traditional agricultural form. For this purpose, respondents preferred the environmental-friendly development through experience programs and agriculture. Third, the urban resident's willingness to pay the fund for conservation of urban agriculture was 39.6%. It was shown that the fund should be used for the maintenance of landscape, site of field practice, supply of agricultural products, prevention of disaster or conservation of region in the descending order. The willingness to pay the estimated monthly average fund per household was 2,623 won. When applying the willingness percentage to pay, 39.6%, to the applied regions, the willingness to pay was shown as 216 million won for monthly average payment, and 2,592 million won for annual average payment.

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.

조사논문 : 가축분뇨 액비 이용농가의 중요도-만족도 분석

장동헌 ( Dong Heon Jang ),이상현 ( Sang Hyun Lee ),유찬주 ( Chan Ju Yu ) 한국축산경영학회,농업정책학회(구 한국축산경영학회) 2013 농업경영정책연구 Vol.40 No.3

To devise livestock manure utilization, this study analyzed importance and performance of farmers using livestock liquid manure by using IPA technique. Typically the main results and implications are as following. First, the surveyed farmers` agricultural products were rice (35.6%), fruits (17.8%),vegetables (43.6%) and their average age was 53.1 years old. The reason of livestock manure use was mainly recommendations from other farmers or agriculture-related organizations. 46.5% of them were experiencing conflicts with neighbours because of stench. Second, for the importance-performance of livestock liquid manure, importance was assessed by stench, fermentation degree, dusting impact, ingredient indication and uniform quality, whilst performance was done by chemical fertilizer reduction, circulation agriculture acknowledgement, subsidy and yields. Third, according to the matrix comparison analysis of pre- and post-use of livestock liquid manure, areas that need to be improved were shown at IV quadrant, which were ingredient indication, recommended rate of application, uniform quality, soil pollution degree, expert consultation/education, stench degree and ferment-ation degree. Therefore, it would be necessary to develop a systematic and comprehensive approach in order to improve the IV quadrant items. Furthermore, an intensive improvement would be required to achieve the desired results for the livestock liquid manure resource project.