4축 어레이 구조를 사용한 5G 안테나 빔포밍에 관한 연구

문창현(Chang-Hyun Moon),이태훈(Tae-Hun Lee),채상훈(Sang-Hoon Chai) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.3

In this study, we has implemented a directional antenna technology for 5G mobile communication that can control beamforming and beam direction without using a motor. Beamforming and beam steering of 5G mobile communication antenna is designed by designing an array type directional antenna with 4 axes, and then adjusting the signal power applied in two adjacent axes in the range of 0 to -31.5dBm by attenuator respectively. It has been confirmed that by fabricating an actual four-axis array antenna and attenuating it in the range of 0 to -31.5 dBm for each of the two axes, the beam direction can be controlled in the range of 0 to 90 ° along with the beamforming of the signal power generated from the antenna. By applying this, if two axes are coupled to each other to control four axes, beamforming and beam direction control can be performed in 360 ° all directions.

전통문화구역의 관광명소개발이 지역주민에 미치는 영향

문창현(Chang Hyun Moon) 한국관광연구학회 2008 관광연구저널 Vol.22 No.1

백령도지역의 관광지리적 특성과 관광개발의 잠재적 가능성 분석

문창현(Chang Hyun Moon) 한국관광연구학회 2005 관광연구저널 Vol.19 No.2

The purpose of this research is to suggest future prospects and the appropriate direction for the tourist development in Baengnyeongdo Island. First, tourism-geographical characteristics in physical and humanistic environments are confirmed to identify potential possibilities of tourist attractions. Second, advantages and defects, the major factors of opportunities and threats which have influenced the regional development of Baengnyeongdo Island toward a attractive tourist destination are examined to propose politic suggestions for the rational development through the SWOT analysis. Baengnyeongdo Island involves remarkable geomorphological and geological academic values, phenomenal aesthetics and outstandingly universal conservational values about biological multiplicity. So to speak, there are affluent scenic spots with the combination of various natural resources and examples of the ecosystem such as Dumujin Beach called `Haegeumgang of the Yellow Sea` with vertical cliffs and fantastic looking rocks, Sagot Beach which is famous for natural landing strip and similar to Italy`s Naples, Kongdol Beach which is composed of bead-like pebbles, Mulgae Bawi which is authorized a habitat of seals for the first time in Korea and designated as a Natural Monument by the Korean government, Peridotite-Basalt Coastal Park. In addition, Baengnyeongdo Island possesses prosperous humanistic characteristics for the tourist development, for instance Indangsu and Yeonbongbawi which were ascertained the real background of `Simcheongjeon`, Junghwadong Church at which the first gospel in Korea has landed, Jinchonri Shell Mounds as the largest midden in the South Korea and various monuments in relation to anticommunist partisan warfare. Therefore it must be the suitable spot for the field trip of cultural and historical relics, a pilgrimage and of national security inspection. Geographical situation as an separated island from inland and the back region of transportation infrastructure and the political distinctiveness caused by the worst military confrontation between the South and the North of Korea have become the motive power which has contributed Baengnyeongdo Island to preserve a world-wide rare superb view and the natural ecosystem without damage and destruction so far. With these tourism-geographical latent energy, the improvement of transportation infrastructure and the detente mood between the South and the North of Korea have given impetus to the expectation of regional growth and developmental investments. The potential values of future tourist development in Baengnyeongdo Island will be immeasurable, if the long-range master plan about hardware and software in tourist environments is established.

전통문화구역 관광개발에 대한 지역주민의 관광영향 지각과 관광개발 태도 분석

문창현(Moon Chang-Hyun) 한국지역사회학회 2007 지역사회연구 Vol.15 No.4

The purpose of this research is to suggest appropriate directions for desirable tourist attraction development in the traditional culture district through the investigation of the local residents' perception of tourism impact and the residents' attitude toward tourist attraction development in Jeonju Hanok Village which is the representative Korean traditional culture area. This study focus on the comparative analysis of the difference of the residents' perception of tourism impact and the residents' attitude among local residents in four sub-zones. Tourism impacts on Jeonju Hanok Village appear to be stronger in social and environmental aspects in the long run than in short-term economic aspect. Especially most local residents are not confirmed to perceive positive effects in the economic aspect like the increment of income and employment from tourism. And inhabitants are investigated to perceive the traffic congestion and crowdedness with tourists in the most seriousness among the whole tourism impacts. But it is a good thing that negative effects on Jeonju Hanok Village community in social aspect like crime, juvenile delinquency, decadent trend, extravagance appear to be slight. The success of tourist attraction development in Jeonju Hanok Village depends on the guarantee of providing economic benefit to local community and the encouragement of voluntary residents' participation. In other words, it is just the local resident that is able to preserve traditional culture as a regional place asset the most effectively in the traditional culture district.

박물관 관광 서비스품질의 관람객 만족도에 관한 연구 : history museum과 art museum과의 비교 분석을 중심으로

문창현(Moon Chang-Hyun),정성미(Jung Sung-Mi) 한국지역사회학회 2009 지역사회연구 Vol.17 No.1

The purpose of this research is to suggest appropriate directions for the museum management like exhibition, facilities through the investigation of the tourist's satisfaction with the SERVPERF of the museum tourism. This research focus on the comparative analysis of the tourist's satisfaction between Jeonju National Museum as a case of history museum and Jeonbuk Province Art Museum as a case of art museum. The results of this study for the tourist's satisfaction with the SERVPERF of the museum are summarized as follows. First, as a result of the test of significance, the difference of the tourist's satisfaction with the SERVPERF of the museum between Jeonju National Museum and Jeonbuk Province Art Museum is confirmed to be statistically significant. Second, the difference of the satisfaction with the SERVPERF of the museum in aspect of the tourist's demographic characteristics(sex, age and an academic background) is confirmed to be statistically significant. Third, the tourist's satisfaction with the SERVPERF of the museum appears to be positively correlative with the tourist's comprehensive satisfaction. In conclusion, subdivided museum management strategies, especially educational contents of exhibition and creative skills for display are investigated to be necessary to maximize the diverse demographic tourists' satisfaction effectively.

안면도지역의 공간적 특성과 국제관광휴양단지 개발에 따른 전망

문창현(Moon, Chang-Hyun) 한국관광연구학회 2002 관광연구저널 Vol.16 No.1

압축 종동 예하중이 요추 인대에 미치는 영향과 요통과의 관계

문창현(Chang-Hyun Moon),정태은(Tae-Eun Chung),신효철(Hyo-Chol Sin) 한국자동차공학회 2010 한국 자동차공학회논문집 Vol.18 No.6

정상 및 당뇨 흰쥐에서 주령과 절실에 의한 양파의 혈당조절작용 변화

문창현(Chang Hyun Moon),정이숙(Yi Sook Jung),김민화(Min Hwa Kim),이수환(Soo Hwan Lee),백은주(Eun Joo Baik),박세원(Se Won Park) 한국응용약물학회 1997 Biomolecules & Therapeutics(구 응용약물학회지) Vol.5 No.4

Onion (Allium cepa Linn) has been reported to have hypoglycemic activity in human and several animal models. In the present study, we performed intraperitoneal glucose tolerance test (IPGTT) in young (1.5 mo) and aged (5 mo) rats treated with onion in order to determine whether aging can influence on the anti-hyperglycemic effect of onion. In addition, we investigated the hypoglycemic effect of onion in streptozotocin-induced diabetic rats treated with aqueous extracts of onion (500 mg/kg, i.p., daily) for 4 weeks. Blood glucose level was determined in fasted and fed rats by using a glucometer (Johnson & Johnson). In glucose tolerance test, blood glucose level was maximally increased 15 min after glucose load (2 g/kg, i.p.), and recovered to the basal level 3 hr after glucose challenge in young and old rats. The maximum blood glucose levels of young and aged rat were 184 ± 7.49 and 225.2 ±12.55 mg/dl, respectively. A single i.p. injection of aqueous extract of onion (1 g/kg) 30 min before glucose challenge significantly decreased blood glucose levels at 15, 30, 60, 90 min after glucose load in aged rats, while the administration of onion did not show any significant effect in young rats. In onion-treated diabetic rats, significant hypoglycemic effect (p<0.05) was observed, and the effect was greater in fasted rats than in fed. In conclusion, these results suggest that anti-hyperglycemic effect of onion can be changed by age and fasting.

생태관광개발이 지역사회에 미치는 영향 : 경제적 · 사회문화적 · 환경적 측면의 지역주민 의식수준을 중심으로

문창현(Chang-Hyun Moon) 한국지역사회학회 2007 지역사회연구 Vol.15 No.1

The purpose of this research is to suggest appropriate directions and desirable plans for successful ecotourism development to local community through the investigation of residents' consciousness status about tourism effect in viewpoints of economy, socioculture and environment in the case of Suncheon Bay Area. To carry out the purpose, first, the regionally given basic conditions for the accomplishment of ecotourism in the physical environment of Suncheon Bay Area are confirmed through tourism-geographical and ecological approach to evaluate the potential possibility of ecotourism development in Suncheon Bay Area. Second, through the survey of inhabitants' consciousness status, the effect of ecotourism development on local community is identified in economic, sociocultural and environmental aspects. Third, on the basis of results identified above, appropriate direction and effective methods for successful ecotourism development in the local scale are proposed. Suncheon Bay Area involves remarkable ecologically academic values, phenomenal aesthetics and outstandingly universal conservational values with the combination of various immaculate natural resources and biodiversity. So this area is confirmed to arrive at the gratifying level in aspect of the ecological environment for the accomplishment of ecotourism. Ecotourism in Suncheon Bay Area has not matured enough to offer economic, social and cultural benefits to local community satisfactorily. So to speak, ecotourism in this area does not yet establish the stable foundation. But judging from the research survey intended for local inhabitants, the conservation of natural environment which is one of the most important object is identified to achieve appreciably. In conclusion, the success of ecotourism depends on the sustainability of ecological place assets, the guarantee of providing economic benefit to local community and the encouragement of voluntary local residents' participation in public affairs.

중요도-성취도 분석(IPA)에 의한 전주 자연생태박물관의 생태관광 매력성 평가

문창현(Chang Hyun Moon) 인간식물환경학회 2011 인간식물환경학회지 Vol.14 No.1

The purpose of this research is to suggest appropriate directions for the improvement of ecotourism service quality through the investigation of the museum visitors’ satisfaction by the importance-performance analysis in case of Jeonju Nature Ecological Museum. For this purpose it focuses on the comparative analysis of difference between importance and performance that ecotourists evaluate on the ecotourism destination’s attractiveness of Jeonju Nature Ecological Museum. The results may be summarized as follows. The visitors’ satisfaction level was confirmed to be lower than their importance level through the evaluation of the ecotourism destination’s attractiveness of Jeonju Nature Ecological Museum. Attributes concerning environmental interpretation and eco-experience need to keep up the good work as the representative ecotourism destination’s attractiveness. On the other hand, observational facilities and experiential programme of natural ecosystem were urgently required to improve with the concentrated complement for the enhancement of ecotourism service quality. And attributes concerning the condition of natural ecosystem must be sublated to input overkill because of extremely high performance compared with low importance.