형성층 전기저항을 이용한 조경용 수목 활력도 분석

황동규,김동엽,Hwang, Dong Kyu,Kim, Dong Yeob 응용생태공학회 2016 Ecology and resilient infrastructure Vol.3 No.4

수목의 활력도는 다양한 방법으로 측정한다. 수목의 형성층 전기저항은 전기생리학적 진단 방법을 이용하여 수목의 활력도를 간접적으로 나타낸다. 본 연구는 Shigometer를 이용하여 몇 가지 수목의 활력도를 측정하고 수종 간 차이를 비교하고자 하였다. 그리고 개엽 시기, 방위, 수피 온도 등 전기저항 값에 영향을 주는 요인들을 파악하고자 하였다. 측정용 탐침의 길이를 일정하게 유지하여 측정오차를 최소화하였다. 대상 수종은 성균관대학교 자연과학캠퍼스에 있는 30-40년생 느티나무, 은행나무, 메타세쿼이아, 잣나무 및 튜울립나무로 하였고 각 종당 3개체를 선정하였다. 측정 시기는 2011년 3월부터 5월까지, 지면으로부터 60 cm와 흉고높이인 1.2 m에서 동서남북 4개 방위 별로 전기저항 값을 측정하였다. 수목 부근의 토양환경과 식물의 스트레스 반응을 함께 측정하였다. 측정 결과를 바탕으로 전기저항과 영향 요인과의 상관관계를 살펴보았다. 개엽 시기 이전인 3월 중순까지는 대체적으로 전기저항 값이 높았으나 4월부터 점차 낮아지기 시작하여 5월 11일에는 가장 낮은 값을 보였다. 전기저항 값의 시기별 변화는 토양수분, 토양전도도, 토양온도, 수목의 스트레스 반응과 비슷한 경향을 보였다. 잣나무의 경우 겨울에도 잎이 떨어지지 않아 측정 기간 동안 전기저항 값의 변화는 크기 않았다. 느티나무, 은행나무 및 메타세쿼이아는 남쪽 방향의 수피 온도가 다른 방위에 비하여 높았으며 전기저항 값은 가장 낮았다. Shigometer는 수목의 활력도를 현장에서 간단하게 측정함으로써 수목 관리에 유용하게 이용할 수 있을 것으로 생각된다. There are various methods to evaluate tree vigor. Cambial electrical resistance represents tree vigor using the method of electrophysiological diagnosis. This study investigated the vigor of several tree species using Shigometer, and compared the differences among the species. The factors, such as foliation, trunk orientation and bark temperature, which affect electrical resistance were also investigated. The needle penetration into cambium was controlled to keep the depth consistent in order to minimize measurement error. Each of three trees were selected from Zelkova serrata, Ginkgo biloba, Metasequoia glyptostroboides, Pinus koraiensis, and Liriodendron tulipifera. The electrical resistances were measured at 60 and 120 cm height of the stem in 4 directions from March until May 2011. The soil conditions in surrounding areas and tree stress responses were also measured. The results were analyzed for the relationship between electrical resistance and the affecting factors. The electrical resistance showed a relatively higher level before foliation until mid-March. The values started to decline from April and recorded a minimal level on May 11. The changes of soil moisture, soil electric conductivity, and tree stress responses during the measurement period showed a similar trend to that of electrical resistance. The Pinus koraiensis, an evergreen conifer, showed few changes on the electrical resistance values during the measurement period. Zelkova serrata, Ginkgo biloba, and Metasequoia glyptostroboides showed the highest bark temperatures and lowest electrical resistances at their south-facing stem. Shigometer can provide measures simple to assess tree vigor in the fields, and to the management of trees.

프로 스포츠선수의 소셜 미디어 활동 속성이 구단 이미지, 구단 충성도, 관람의도에 미치는 영향

황동규(Hwang, Dong-Kyu),한진욱(Han, Jin-Wook),허정석(Heo, Jung-Seok) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.3

The purpose of this study was to investigate the relationship between social activity attributes of the professional sport athletes, team image, team loyalty and visiting intention. Toward this end, fan cafe members of the professional sports athletes were selected as a study population. A total of 247 members was conveniently selected and responded to on-line survey questionnaire. 237 usable data were utilized in data analyses procedure including frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and multivariate multiple regression analysis with SPSS 23.0. The results of this study were as follows. Firstly, all the three sub-dimensions of the social media activity attributes had significant influence on team image. Secondly, information and entertainment sub-dimensions had significant effects on team loyalty. Thirdly, interactivity and entertainment sub-dimensions significantly affected visiting intention. Discussions and additional implications were also suggested.

Koebner 현상을 보인 당뇨병성 유지방성 괴사생성

황동규(Dong Kyu Hwang),박종민(Jong Min Park),권상진(Sang Jin Kwon),유희준(Hee Joon Yu),박용욱(Yong Wook Park) 대한피부과학회 2000 대한피부과학회지 Vol.38 No.2

The isomorphic response of Koebner is a well-known phenomenon commonly associated with psoriasis, but it has been also described in conjuction with a host of other disorders. However it has seldom been associated with necrobiosis lipoidica diabeticorum, a rare skin manifestation of diabetes mellicuts. In this report, we describe a 59-year-old woman who developed necrobiosis lipoidica diabeticorum on the left shin where a mosquito had bitten her 2 months ago. Four months ago, she was diagnosed as necrobiosis lipoidica diabeticorum on the right forearm and shin by biopsy and the lesions were improved with corticosteroids intralesional injection. The lesions were asymptomatic and had grown slowly. Histopathological findings showed a large palisading granulomas composed of histiocytes, epithelioid cells and areas of necrobiosis of collagen with multinucleated giant cells. Van Gieson stain showed decreased and fragmented elastic fibers and there were no deposits of mucin in the necrobiotic areas. The lesions were improved with triamcinolone acetonide intralesional injection and there was no recurrence during 4 months. (Korean J Dermatol 2000;38(2):245~248)

경기도 마을숲의 보전 및 관리에 관한 연구

황동규 ( Dong Kyu Hwang ),김동엽 ( Dong Yeob Kim ) 한국전통조경학회 2015 한국전통조경학회지 Vol.33 No.4

본 연구는 경기지역 마을숲의 위치, 형태, 환경, 식물상 등을 조사하고 변화과정을 바탕으로 경기도 마을숲의 보존 및 관리를 위한 방안을 제시하는 것을 목적으로 하였다. 현존하는 경기도 마을숲은 23개소이다. 경기도의 마을숲은 풍수적 배경을 가진 경우가 10개소로 가장 많았다. 특히 용인 및 이천의 남동지역에 다수의 마을숲이 남아있었다. 마을숲의 소유주체는 마을 9개소, 개인 8개소였다. 개인이 관리하고 있는 마을숲은 2개소였고 나머지는 마을에서 공동관리하고 있었다. 마을숲의 형태는 전체의 52.1%가 띠형이었으며, 풍수 및 재해방지를 위해 조성된 것임을 알 수 있었다. 마을숲의 면적은 평균 3,046㎡로 비교적 작았다. 마을숲을 구성하고 있는 수종은 느티나무와 소나무가 가장 많았으며, 단순교목림과 교목-아교목림의 수직구조를 보이는 마을숲이 56.5%로 과반수를 차지했다. 수목 피해가 30%이상인 마을숲은 총 7개소였다. 피해 원인은 숲에 인접한도로 건설, 토양 답압, 복토로 인한 고사 등이었으며 피해목의 활력도는 정상수목에 비해 활력이 현저히 저하되었다. 마을숲은 동제 존속 여부, 제도적 보호, 상수원보호구역 지정, 도로 건설, 토지이용 변화, 풍수해 및 산림 개발의 영향을 받아 변화한것으로 나타났다. 마을숲의 보존 및 관리를 위하여 숲의 과다한 이용을 제한하고 수목을 보호하며 토양 환경을 개선하여 숲의 생육 환경을 유지해야 한다. 그리고 숲 주변지역의 개발을 제한하고 마을공동체 활동을 중심으로 숲의 원형을 유지 또는 복원할 필요가 있다. 또한 마을숲을 보호하고 지원하는 제도를 체계화하여 마을숲의 소실을 최소화해야 한다. The objectives of this study were to investigate the location, shape, environment, and vegetation of the Village Forest in Gyeonggi-do and to evaluate the ecological integration and changes of the Village Forests to figure out the measures for conservation and management. There were 23 Village Forests remain in Gyeonggi-do. Ten Village Forests were established based on Feng-shui background. Many of them were found in Yongin area and southeast of Icheon. The Village Forests were owned by local community at 9 village and privately owned at 8 villages. Most Village Forests were managed by local communities except for the two managed by private person. Fifty-two percent of the Village Forests were in strip shape, and most of them were established by Feng-shui background or for the prevention of disasters. The average size of the Village Forests was relatively small at 3,046 m2. The most frequent tree species found at the Village Forest were Zelkova serrata and Pinus densiflora. Over half of the number of Village Forests showed vertical structure of overstory trees only or overstory-sub overstory combination, which seemed to be resulted from the loss of understory plants by the activities of local residents. The Village Forests that had over 30% of damaged trees were found at 7 villages. The damages were caused by the road construction close to the groves, soil compaction, and tree death by covering lower stem with soil. The vitality of the damaged trees seemed to be significantly low compared to that of the undamaged. There were factors that determined the changes in the Village Forests: community ritual, institutional protection, designation as a water resource protection district, road construction, land use change, windstorm hazards, and development of forest areas. In order to conserve and manage the Village Forests appropriately, it is necessary to limit excessive use of the grove areas and maintain proper tree growing conditions by improving the soil environment. The development of neighborhood areas need to be controlled and community activities should be encouraged to maintain or restore the original landscape of the groves. Protection measures and supporting policies need to be enforced to keep the Village Forests from disappearing in near future.

스포츠브랜드 콜라보레이션 유형이 브랜드 태도에 미치는 영향: 희소성 메시지와 독특성 욕구의 조절 효과

황동규 ( Dong-kyu Hwang ),한진욱 ( Jin-wook Han ) 한국체육학회 2020 한국체육학회지 Vol.59 No.3

본 연구는 스포츠브랜드의 콜라보레이션 유형(동질 vs. 이질)이 소비자의 브랜드 태도에 미치는 영향에 있어 희소성 메시지(유/무)와 독특성 욕구 수준의 조절효과를 규명하는데 목적이 있다. 이러한 연구목적을 달성하기 위해 스포츠브랜드 콜라보레이션 제품을 구매할 계획을 가지고 있거나 스포츠브랜드 콜라보레이션 제품을 직접 구매한 경험이 있는 소비자를 대상으로 비확률표본추출법 중 판단표본추출법을 통해 설문지를 배포하여 총 144부의 유효 표본을 수집하여 자료분석을 실시하였다. 자료처리는 SPSS 23.0을 통해 빈도분석, 탐색적 요인분석, 신뢰도 분석, 상관분석 및 이원분산분석을 실시하였다. 연구 결과에 따르면, 첫째, 스포츠브랜드 콜라보레이션 유형(동질 vs. 이질)은 브랜드 태도에 유의한 영향을 미치는 것으로 나타났다. 둘째, 스포츠브랜드 콜라보레이션 유형이 브랜드 태도에 미치는 영향은 희소성 메시지(유/무)에 따라 차이가 있는 것으로 나타났다. 셋째, 스포츠브랜드 콜라보레이션 유형이 브랜드 태도에 미치는 영향은 독특성 욕구 수준(고/저)에 따라 차이가 있는 것으로 나타났다. 이와 함께 연구 결과에 따른 논의와 제언을 제시하였다. The purpose of this study was to examine the moderating effects of scarcity message and need for uniqueness in the relation between sports brand collaboration type and brand attitude. Toward this end, a total of 144 usable data was collected with purposive sampling method. Data analyses included frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and two-way ANOVA with SPSS 23.0. The results of this study were as follows. Firstly, sports brand collaboration type had a significant effect on brand attitude. Secondly, the effect of sports brand collaboration type on brand attitude was different depending on the presence of scarcity message. Thirdly, the impact of sports brand collaboration type on brand attitude was different depending on consumer’s need for uniqueness. Discussions and additional implications were also suggested.

철도개발지역의 환경생태 정보 데이터베이스 구축

김민경(Min-kyeong Kim),황동규(Dong-Kyu Hwang),김동엽(Dong Yeob Kim) 한국철도학회 2019 한국철도학회 학술발표대회논문집 Vol.2019 No.11

Keratosis Follicularis Squamosa (Dohi)

노영석(Young Suck Ro),황동규(Dong Kyu Hwang) 대한피부과학회 1999 대한피부과학회지 Vol.37 No.9

N/A

연구실 안전관리 현황 및 정책 추진방향

정승필(Seong-Pil Chung),황동규(Dong-Kyu Hwang),이현주(Hyun-Ju Lee),권용익(Yong-Ik Kwon),전형준(Hyung-Jun Jeon),홍진혁(Jin-Hyuk Hong),이황원(Hwang-Won Lee),노영희(Young-Hee Roh) 한국가스학회 2021 한국가스학회 학술대회논문집 Vol.2021 No.5

스포츠 OTT 플랫폼 서비스의 이용동기가 이용만족도 및 지속이용의도에 미치는 영향

김도균(Kim, Do-Kyun),황동규(Hwang, Dong-Kyu) 한국체육과학회 2023 한국체육과학회지 Vol.32 No.3

The purpose of this study was to investigate the relationship between Sport OTT platform service motivation user satisfaction and continuous use intention. Toward this end, utilizing sports OTT platform services were selected as a study population. A total of 250 users was conveniently selected and responded to online survey. 232 usable data were utilized in data analyses. The collected data were analyzed using frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, multiple regression analysis with SPSS 28.0. The results of this study were as follows. Firstly, the motivation for sports OTT platform services (information, diversity, interactivity, usefulness) have a significant impact on satisfaction. Second, the motivation for sports OTT platform services (information, diversity, interactivity, usefulness) have a significant impact on the intention to continue using the service. Discussions and additional implications were suggested as well.

포도구균성 열상 피부 증후근 , 20 예의 고찰

박진우(Jin Woo Park),황동규(Dong Kyu Hwang),유희준(Hee Joon Yu) 대한피부과학회 2002 大韓皮膚科學會誌 Vol.40 No.9

N/A Background: Staphylococcal scalded skin syndrome is a relatively uncommon but well described syndrome defined by clinical, microbiological and histological criteria, The spectrum of the disease in children includes not only a severe and acute exfoliative form(generalized form) but also a scarlatiniform eruption(abortive form) and bullous impetigo(localized form), Objective: We performed the study to review the clinical, microbiological and histological features of staphylocaccal scalded skin syndrome in Korean children. Methods: We reviewed retrospective1y medical records, clinica1 photographs, microbiologic results and histopathologic findings of 20 cases of staphylococcal scalded skin syndrome diagnosed at Hanyang University Kuri Hospital from February 1998 to November 2001. Results: 1. Of the 20 patients, 13 were generalized type and 7 were abortive type and male to female sex ratio was 1:1.5. The mean age of onset was 3.2 years. 2. The ordinary cultures from the suspected sites of primary infection revealed methicillin-sensitive Staphylococcus aureus in 7 of the 18 patients, and methicillin-resistant Staphylococcus aureus in 6 of the 18 patients. The colonized sites were conjunctiva(23%), throat(23%), skin(23%), nasal cavity(23%) and ear(8%) in 13 cases. 3. Perioral crusting and fissuring was observed in all cases and the erythema was accentuated in the flexural areas. 4. Histopathologic findings of 11 cases showed intraepidermal cleavage, with splitting occuring beneath and within the stratum granulosum. In 6 of 8 generalized forms, several acantholytic epithelial cells were observed. 5. The coexisting diseases were variable, including atopic dermatitis(5 cases), polycystic kidney disease(1 case) and varicella(1 case). 6. All the patients were treated with first generation cephalosporin and vencomycin therapy without significant sequelae. Conclusion: There are no significant relation between clinical types of SSSS and causative organisms. Methicillin-resistant Staphylococcus aureus may induce generalized form and abortive farm of staphylococcal scalded skin syndrome but should be confirmed by production of exfoliation in the new-born mouse assay, (Korean J Dermatol 2002;40(9): 1051-l057)