가연성 흡음재의 화재 위험성에 관한 연구

한종원 한국화재조사학회 2022 한국화재조사학회 학술대회 Vol.2022 No.06

자동차 브레이크액 누유에 따른 발화 위험성 연구

한종원,이정봉,정오영 한국화재감식학회 2020 한국화재감식학회 학회지 Vol.11 No.2

The brake fluid plays an important role in braking device. It increases the water content and lowers the boiling point and the flash point, as the travel distance is increased. The possibility of vapor lock and the risk of fire is also increased. The brake fluid leakage due to the solenoid failure in the ABS module, which is a main component of the brake system, can be ignited by the circuit board terminal trekking short circuit. It has been confirmed that the leaked brake fluid caused by overheating of the drum and the disc due to repetition of braking can be ignited even in the case of short-circuit spark and high-temperature metal contact. Also, the leakage and the injected brake fluid due to the cylinder failure of the disc and the drum brake are ignited by overheating due to braking repetition.

한라산 모데미풀(미나리아재비과) 자생지 분포 특성

한종원,강신호,이가형,양선규 한국자원식물학회 2010 한국자원식물학회지 Vol.23 No.2

This study was conducted to provide basic information for conservation and restoration through investigation of vegetation and soil condition of Megaleranthis saniculifolia Ohwi, Korean endemic species, in Mt. Halla, Jeju Island. Very few individuals were discontinuously distributed and restricted at 1,075m above sea level, very steep slope (60-70°), rocky area of north face of Eorimok Valley. For investigation of environmental condition, we established two 10x10 quadrats in the habitats and one control quadrat. Twenty-four species were found at site 1 under 10-12m Carpinus laxiflora tree layer (35%) and soil conditions are pH 5.9, moisture content (field capacity) 9.39%, organic carbon 8.22% and organic matter 14.17%, respectively. Site2, 15 taxa were found under 8-12m Platycarya strobilacea tree layer (40%) and soil conditions are pH 5.07, moisture content 4.99%, organic carbon 5.34% and 9.21 percentage of organic matter. In the control quadrat, 14 taxa were found under 10m Carpinus laxiflora tree layer (10%) and soil conditions are pH 5.27, moisture content 6.23%, organic carbon 4.74% and organic matter 8.17%, respectively. The principal causes of threat which were investigated in this study are competition among company, very steep slopes, artificial management of valley. For restoration and conservation of habitats, it is needed to suitable plans. 한라산에 자생하는 한국특산 모데미풀의 보전 및 복원을 위한 기초자료를 제공하기 위하여 생육지 특성을 연구하였다. 모데미풀의 자생지는 해발 1,075m에 위치하고 경사는 60-70°로 매우 가파른 암석지대로, 어리목 계곡의 북사면 일대에 소수의 개체가 불연속적이며 제한적으로 분포하였다. 조사는 모데미풀이 확인된 2개 지역과 분포하지 않는 인근 지역을 조사하여 비교 하였다. 조사구 1은 교목층(35%)이 10-12m로 형성되어 24종류의 식물종이 확인되었으며, 토양은 pH 5.59, 수분함량 9.39%, 유기탄소함량 8.22%, 유기물함량 14.17%로 조사되었다. 조사구 2는 굴피나무, 고로쇠나무로 형성된 수관(8-12m, 40%)하에, 15종류의 식물종이 확인되었으며, 토양은 pH 5.07, 수분함량 4.99%, 유기탄소함량 5.34%, 유기물함량 9.21%로 조사되었다. 대조구의 경우는 서어나무 교목층(10m, 10%)하에, 14종류의 식물종이 확인되었으며, 토양은 pH 5.27, 수분함량 6.23%, 유기탄소함량 4.74%, 유기물함량 8.17%로 조사되었다. 본 연구에서 확인된 위협 요인으로는 다른 종과 생육지 경쟁에서의 도태, 매우 가파른 자생지 구조 등의 자연적인 요소와 계곡 정비와 같은 인위적인 요소로 판단되었으며, 보전을 위한 현지 내외 보호가 필요할 것으로 판단된다.

다래끼 유감

한종원 약업신문사 1996 의약정보 Vol.1996 No.1

ITS 염기서열에 의한 한국산 괭이눈속(Chrysosplenium)의 계통학적 연구

한종원,양선규,김현준,장창기,박정미,강신호 한국자원식물학회 2011 한국자원식물학회지 Vol.24 No.4

The internal transcribed spacer (ITS) regions of nuclear ribosomal DNA from genus Chrysosplenium were sequenced to address phylogenetic relationship. ITS including 5.8S sequence varied in length from 647 bp to 653 bp. Among them, 219 sites were variable sites with parsimony-informative. The aligned sequences were analyzed by maximum parsimony (MP) and neighbor-joining (NJ) methods. In the strict consensus trees of parsimony analysis, the monophyly of Chrysosplenium was supported by 100% bootstrap value. The first clade, C. pseudofauriei was at the basal position of the genus, and others formed two clades with high bootstrap support. The second clade included Ser. Pilosa and Ser. Oppositifolia and third clade included Ser. Alternifolia and Ser. Flagellifera. The NJ trees showed essentially the same topology. Finally, DNA sequences of ITS regions were useful phylogenetic marker in this genus. Based on the ITS and ridge seed morphological results, C. sphaerospermum Maxim. and C. valdepilosum (Ohwi) S.H. Kang & J.W. Han were discussed their scientific names and taxonomic positions. 괭이눈속 식물에 대한 계통 유연관계를 알아보기 위하여 핵 rDNA의 internal transcribed spacer(ITS) 지역에 대한 염기서열을 분석하였다. 5.8s를 포함한 ITS 염기서열은 647-653 bp로 그중 219개의 염기에서 유전적 다양성을 나타내었다. 정렬된 염기서열은 bootstrap을 포함한 parsimony 방법과 neighbor-joining 방법을 통하여 계통수를 평가하였다. 그 결과 C. pseudofauriei(선괭이눈)이 군내군의 가장 기부에 분계조를 형성하였고, Ser. Pilosa and Ser. Oppositifolia와 Ser. Alternifolia and Ser. Flagellifera가 높은 bootstrap 값으로 두 개의 분계조를 각각 형성하였다. Neighbor-joining 분석의 결과도 일치하였다. 본 연구결과 핵 rDNA의 ITS 염기서열 분석은 괭이눈속의 계통학적 연구에 유용한 마커로 확인되었으며, 최종적으로 ITS 염기서열과 종자 형태형질을 바탕으로 C. sphaerospermum Maxim. and C. valdepilosum (Ohwi) S.H. Kang & J.W. Han에 대한 분류학적 검토를 하였다.

한국특산 누른괭이눈(Chrysosplenium flaviflorum Ohwi)의 형태적 특성 및 분포

한종원,장창기,강신호,김현준,양선규 한국자원식물학회 2010 한국자원식물학회지 Vol.23 No.5

This study reports on the morphological characteristics and distribution for conservation and practical use in the Korean Peninsula of Chrysosplenium flaviflorum through a comparison with relative species. The morphological characters that were newly investigated in this study included subhypogaeus stolons and glabrous on the surface of leaves. The former has not been described by any taxonomist who had previously treated this species with the exclusion of Hara. Despite this, the latter is a very important key to using the identification of varieties of Ser. P wosa though there were no descriptions which included Ohwi. C. flaviflorum Ohwi which was endemic and known to be distributed only in the northern area of the Korean Peninsula, was also observed in the Gapyeong-gun, Gyeonggi-do, Cheorwon-gun, Gangwon-do, and Yeongdong-gun, Chungcheongbuk-do middle area since the latest collection report in 1943. There is a requirement for further study to be conducted on the distribution and management by designation for the Special Plant Species by the Korean Ministry of Environment. 본 연구는 한반도 특산식물 누른괭이눈(C. flaviflorum Ohwi)의 보전과 활용을 위하여 근연분류군과의 비교를 통한 형태학적 특성 조사와 새로운 분포지의 보고를 목적으로 하였다. 본 연구에서 새롭게 확인된 형질은 지하로 벋는 줄기의 생성과 잎 표면의 무모로, 전자는 본 분류군에 대한 선행연구 중 Hara를 제외한 모든 연구에서 언급되지 않은 형질이며, 후자는 Ser. pliosa 내의 변종의 동정에 매우 중요한 형질임에도 본 종을 발표한 Ohwi를 포함한 모든 연구자들이 기재하지 않았던 중요한 형질이다. 한국특산식물인 본 종은 현재까지 한반도 북부아구에만 한정 분포한다고 알려져 왔는데 본 연구에서 한반도 중부아구인 경기도 가평군과 강원도 철원군, 충청북도 영동군에 분포하는 것이 1943년 이후 처음으로 확인되었다. 따라서 본 종의 분포에 관한 정밀한 연구와 환경부 식물구계구분에 의한 특정식물종으로의 지정 등을 통한 관리가 필요하다.

Isolation of Total RNA from a Freshwater Green Alga, Zygnema cruciatum,Containing High Levels of Pigments

한종원,Gwang Hoon Kim,Key Pyoung Lee,Minchul Yoon 한국조류학회I 2007 ALGAE Vol.22 No.2

Conventional methods for the isolation and purification of mRNA from Zygnema were unsuccessful because of its high amount of pigments and RNA interactive molecules. In particular, pigments were difficult to remove using conventional protocols because they interacted with RNA during pulverization of the materials. This resulted in total degeneration of RNA in two to three hours. To alleviate this problem, we developed an isolation method that utilized DEAE-cellulose resin. The pigments bound to DEAE anion exchange resin and separated from the RNA. Purified total RNA showed an yield of 50 μg per 100 mg of tissue with this method. The amplified 2nd strand cDNA was distributed 300 bp and over.

Seismic event and phase detection using deep learning for the 2016 Gyeongju earthquake sequence

한종원,김성룡,신동훈,이동헌,이상준,유승훈,박동희 한국지질과학협의회 2023 Geosciences Journal Vol.27 No.3

Deep learning (DL) methods have a high potential for earthquake detection applications because of their high efficiency at processing measurement data, such as picking seismic phases. However, the performance of DL methods must be evaluated to ensure that they can replace conventional methods so that full automation can be achieved. State-of-art DL methods incorporate advanced techniques and train with large global datasets to enhance their earthquake detection capabilities. In this study, we tested a representative DL model on the 2016 Gyeongju earthquake sequence in the Korean Peninsula and compared the results with a previously established catalog and with the results of the conventional Short Time Average/Long Time Average (STA/LTA) method. The DL model demonstrated reasonable improvements in efficiency and performance by detecting more and smaller earthquakes within a much shorter runningtime than the other methods. In addition, the DL algorithms generally provided precise pickings of P- and S-wave phases. The DL model showed good generalization because it appropriately detected earthquakes in the study area that were not included in the training dataset. However, our results did suggest possible errors that should be accounted for, such as inconsistent phase picking, missing large earthquakes, and detecting non-natural earthquake signals. From the result of tests, local optimization may be important for realizing fully automatic earthquake monitoring, such as retraining with a local dataset, fine-tuning, or transfer learning. In addition, incorporating post-processing techniques such as phase association and discrimination into the DL framework is necessary.

약용식물명의 올바른 사용

한종원 한국종자연구회 2020 종자과학과 산업 Vol.16 No.1

America Latina, la Tierra de Promisio>n

한종원 한국외국어대학교 1964 한국외국어대학교 논문집 Vol.1 No.1