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손호준(Ho Jun, Son),선유정(Yu Jeong, Seon),유호석(Ho Suk, Ryu) 한국전지학회 2021 한국전지학회지 Vol.1 No.1
최근 무인기 중에서 많은 사람들이 스포츠, 완구, 모빌리티 형태로 사용하고 있는 멀티콥터(드론)의 시장은 급격하게 성장하고 있다. 다양한 기능을 가진 드론의 개발에 따라 큰 성능이 필요하게 되었다. 멀티콥터동력의 핵심 부품인 이차 전지의 고용량, 고출력 성능, 안전성 등과 관련 관심사도 증가하고 있다. 또한 멀티콥터에서 최근 이러한 전지(이차전지) 단독으로 사용되는 것 이외에도 태양전지, 내연기관, 연료전지 등과 혼용되는 등 다양한 형태로 사용되고 있다. 그러므로 본 논문은 멀티콥터와 멀티콥터에 사용되는 이차전지의 특성과 사용에 대하여 알아보도록 하겠다. Recently, market of the multi-copter (drone), which is used by many people in the form of sports, toys, and mobility, is growing rapidly. The development of drones with various functions required great performance. Interests related to high capacity, high power performance, and safety of secondary batteries, which are key components of drone power, are also increasing. In addition to being recently used exclusively by drones, it has been used in various forms, including solar cells, internal combustion engines, and fuel cells. Therefore, this paper will examine the characteristics and use of secondary batteries used in drones and drones.
Ⅰ분과 : 청옥산(경북 봉화) 산림습원의 식물상 및 식생
손호준 ( Ho Jun Son ),김영설 ( Young Sol Kim ),윤주웅 ( Ju Ung Yun ),전근우 ( Kun Woo Chun ),박완근 ( Wan Geun Park ) 한국산림과학회 2014 한국산림과학회지 Vol.103 No.3
The purpose of this study was to provide basic data for preserving forest ecosystem with understandingforest wetland condition of Mt. Cheongok. It was found from this research that vascular plants of surveyed areawere composed of 72 families, 167 genera, 209 species, and 2 subspecies, 27 varieties, 5 formae. totaling 243 taxa. Among the investigated vascular plants, Korea endemic plants were 9 species, rare plants 15 species, and naturalizedplants 8 species, respectively. According to the occurrence frequency within the wetland investigated, obligate uplandplants (OBU) accounted for 75.72% (184) among the total species investigated, wherea obligate wetland plant(OBW) were four species (4.65%). There were 26 of hygrophyte plants and 2 of emergent plants in the research areaaccording to wet degree. According to habitat category, the most frequently occurred habitat was forest (136 species,55.97%), and the others were in the order of meadow and shrubland (70 species, 28.81%), wet meadow (35 species,14.40%), and aquatic environment (2 species, 0.82%), respectively. In the result of analysis of important value,Fraxinus rhynchophylla and Carex pseudosinensis was the highest as 22.17% and 10.40%. It was confirmed that thespecies diversity was relatively high. Shannon-Wiener``s species diversity index was calculated as 2.507. Based on theseresults, long-term monitoring survey should be urgently needed for ecological restoration and recovery.
춘천시 도심하천(태백천)과 도시림에 있어서 귀화식물의 분포특성
손호준 ( Ho Jun Son ),안치호 ( Chi Ho Ahn ),안승일 ( Seung Il Ahn ),김남영 ( Nam Young Kim ),김영설 ( Young Sol Kim ),박완근 ( Wan Geun Park ) 한국산림과학회 2011 한국산림과학회지 Vol.100 No.2
This study was carried out to investigate the distribution status and invasional characteristics of the naturalized plants. The vascular plants in these areas were consisted of total 381 taxa: 81 families, 234 genera, 295 species, 2 subspecies, 66 verieties, 18 forms. Among the investigated vascular plants, naturalized plants (Sicyos angulatus, Barbarea vulgaris, Thlaspi arvense, Amorpha fruticosa, Trifolium pratense, Ambrosia artemisiifolia, Ambrosia trifida, Aster pilosus, Rumex acetosella etc.) were 41 taxa. The Naturalization Index (NI) was 10.70% and the Urbanization Index (UI) was 15.30% at Chuncheon city. The Invasion Index was 63.41% at urban river and 97.56% at stream high, 19.51% at urban forest area.
DMZ 인근지역 산림유전자원보호구역(대성산, 주파령)의 식물상 및 식생군집분석
손호준 ( Ho Jun Son ),김영설 ( Young Sol Kim ),안치호 ( Chi Ho Ahn ),박완근 ( Wan Geun Park ) 한국산림과학회 2016 한국산림과학회지 Vol.105 No.1
This study examined the flora and community classification in the Forest Genetic Resources Reserves (FGRR) at Mt. Daeseng and Juparyeong to understand the degree of disturbance and the state of forest stand development within the Civilian Control Line (CCL) and to provide baseline data for preservation and management. Of the vascular plants dispersed throughout the study site, there were 98 families, 311 genera, 507 species, 6 subspecies, 65 varieties, and 10 forms, for a total of 588 taxa. Of these, 92 families, 290 genera, 459 species, 6 subspecies, 58 varieties, and 9 forms, for a total of 532 taxa of native plants, were determined to be dispersed around the FGRR at Mt. Daeseng, and 94 families, 259 genera, 364 species, 6 subspecies, 50 varieties, and 8 forms, for a total of 428 taxa of native plants, were confirmed to be dispersed around the FGRR at Juparyeong. There were 21 taxa of endemic Korean plants growing in the FGRR at Mt. Daeseng, with 14 taxa growing in the FGRR at Juparyeong. In terms of rare plants, 26 taxa were confirmed in the FGRR at Mt. Daeseng, and 10 taxa were confirmed in the FGRR at Juparyeong. A Cluster analysis was performed using vegetation data taken from 58 sample plots in each FGRR. The results showed a total of three representative community classifications from Mt. Daeseng: mixed mesophytic forest, Quercus mongolica.Acer pseudosieboldianum, and Quercus mongolica.Fraxinus rhynchophylla communities. Four representative community classifications were observed from Juparyeong: Quercus mongolica.broad leaved forest, Fraxinus rhynchophylla.broad leaved forest, Quercus mongolica, and Quercus communities. On the whole, the species diversity of the communities in Mt. Daeseng FGRR was greater than for the communities in Juparyeong FGRR. At Mt. Daeseng, the mixed mesophytic forest had the highest species diversity index at 1.590, while at Juparyeong, the Fraxinus rhynchophylla.broad leaved forest had the highest species diversity index at 1.319. These study results should serve as useful baseline data for future preservation and management of the demilitarized zone (DMZ) and the surrounding area.
기상학적 및 수문학적 가뭄지수를 활용한 가뭄 전이 및 피해 특성 분석
김지은,손호준,김태식,김원범,김태웅,Kim, Ji Eun,Son, Ho-Jun,Kim, Taesik,Kim, Won-Beom,Kim, Tae-Woong 대한토목학회 2024 대한토목학회논문집 Vol.44 No.3
가뭄 전이는 기상학적 가뭄이 오랜기간 지속되어 수문학적 가뭄으로 발달하는 현상으로 가뭄 전이 사상은 비전이 가뭄사상보다 지역에 큰 피해를 야기한다. 기존에 수행된 가뭄 전이 연구들은 주로 상관분석을 통해 지체시간을 파악하고 있으며, 가뭄 전이 및 비전이 사상 간의 피해 양상을 비교하는 연구는 부족한 실정이다. 본 연구에서는 충청권역 시군구 단위의 가뭄지수를 활용하여 기상학적 및 수문학적 가뭄간의 중복전이 및 풀링전이를 고려하여 가뭄 전이 여부를 판단하고, 가뭄의 전이 특성(풀링, 감쇠, 지체, 연장)을 분석하였다. 분석 결과 충청북도 충주시에서 2010년 기상학적 가뭄(비전이 사상)이 발생하였으나, 가뭄 피해는 발생하지 않았다. 하지만, 2017-2018년에 발생한 가뭄은 기상학적 가뭄이 수문학적 가뭄으로 전이되면서 심도는 약하지만 지속기간이 길어짐에 따라 가뭄으로 인한 피해가 발생하였다. 이와 비슷하게 2017년 청양군에서는 기상학적 가뭄(비전이 사상)이 발생하였으나, 가뭄 피해는 발생하지 않았다. 하지만, 바로 인접지역인 부여군에서는 동일한 기간에 비슷한 크기의 기상학적 가뭄이 수문학적 가뭄으로 전이되어 가뭄으로 인한 피해가 발생하였다. 본 연구를 통해 비전이 사상보다 전이 사상에서 피해가 심각한 것을 확인하였으며, 이러한 결과는 지역에 적합한 가뭄 대응 정책을 수립하는데 기초자료로 활용할 수 있다. Sustained meteorological drought can lead to hydrological drought, known as drought propagation. The propagated droughts cause more damage to the region than the non-propagated droughts. Recent studies on drought propagation have focused on identifying the lag time using correlation analysis. There is a lack of studies comparing damage patterns between propagated and non-propagated droughts. In this study, the overlap and pooling propagation between meteorological and hydrological droughts were analyzed using drought indices in Chungcheong Province to identify drought propagation, and the propagation characteristics such as pooling, attenuation, lag and extension were analyzed. The results showed that although Chungju-si experienced a meteorological drought in 2010, no damage was caused by the drought. However, a meteorological drought in 2017 and 2018 propagated into a hydrological drought of longer duration but less severity, resulting in drought-affected damage. Similarly, Cheongyang-gun experienced a meteorological drought in 2017, but no damage was reported from the drought. However, in the neighboring county of Buyeo-gun, a meteorological drought with a similar magnitude propagated to a hydrological drought during the same period, resulting in drought-affected damage. The overall results indicated that the damage from propagated drought events was more severe than the non-propagated drought events, and these results can be used as basic data for establishing drought response policies suitable for the region.