논문 : 국립공원 탐방로 내 위험 급경사지 유지관리 방안 연구

김홍균 ( Hong Gyun Kim ),김태호 ( Tae Ho Kim ),김재학 ( Jae Hak Kim ),곽재환 ( Jae Hwan Kwak ),박성욱 ( Sung Wook Park ),최수원 ( Soo Won Choi ),송영갑 ( Young Karb Song ) 대한지질공학회 2016 지질공학 Vol.26 No.1

국립공원은 주로 산악 지형 내 조성되어 있으므로 산사태에 의한 피해 가능성을 항상 내포하고 있다. 본 연구는 산사태 연구의 일환으로 국립공원 탐방로 내 위험 급경사지를 체계적으로 유지관리하기 위한 방안을 마련하는데 목적이 있다. 국립공원에 특화된 자체 체크리스트를 제작하였으며, 전국 19개 국립공원 183개소 급경사지에 대한 실태조사가 이루어졌다. 실태조사의 최종 목적은 위험 급경사지에 대한 안정화 대책을 마련하는 것으로 현장조사와 안정해석의 과정을 거친다. 일부 급경사지에서는 위험성 판단을 위해 지상라이다 등 특수 장비를 이용한 조사를 시도하였다. 중장기 정비계획을 위한 투자우선순위 공식을 개발하였으며, 현장자료를 이용한 순위 및 위험등급을 산출하였다. 최종적으로 위험 급경사지의 향후 체계적인 관리를 위해 “국립공원 급경사지 유지관리시스템”을 개발하였으며, 모든 현장자료들은 시스템 내 DB화 되었다. National parks, which are located mainly in mountainous areas, are always at risk of damage by landslides. The goal of this study is to establish a method for systematically maintaining hazardous steep slopes along trails in national parks. We produced a checklist suitable for each of the 19 national parks nationwide and investigated 183 slopes. The aim of these investigations is to recommend appropriate slope-stability countermeasures, including field investigations and stability analysis. We made preliminary investigations at specific sites, evaluating the slope hazard using specialized equipment such as terrestrial LiDAR. An investment priority formula was developed, and ranking and hazardous grades were calculated as part of a long-term maintenance plan. Finally, to systematically manage dangerous slopes and to house all the field data within one system, we developed the “Slope Maintenance System in National Parks” based on web server that can show various information for slopes.

설악산국립공원 설악폭포 분비나무와 잣나무 1 m 수고생장 기간 조사

최은비(En-Bi Choi),박준희(Jun-Hui Park),김진원(Jin-Won Kim),김요정(Yojung Kim),서정욱(Jeong-Wook Seo) 국립공원연구원 2021 국립공원연구지 Vol.12 No.2

설악산국립공원 설악폭포에 위치한 아고산대 침엽수인 분비나무와 잣나무의 수고생장 기간을 조사하기 위해 본 연구를 수행하였다. 조사를 위해 분비나무 고사목 2본(SAPPAND01, 02)과 잣나무 고사목 1본(SAPPPKD03)을 선발하였다. 높이별 수고생장 기간을 조사하기 위해 뿌리와 줄기 경계를 기준으로 높이 0, 10, 20, 30, 40, 50, 60, 80, 100 cm에서 디스크를 채취하여 나이테(이하, 연륜) 분석을 실시하였다. 또한 고사연도 분석을 위해 생육중인 분비나무 15본에서 생장편을 채취하여, 연구지를 대표하는 연륜폭연대기를 작성하였다. 연륜 분석 결과, 분비나무인 SAPPAND01과 02의 생육 기간은 각각 102년(1915-2016)과 97년(1918-2014)이었으며, 잣나무인 SAPPPKD03은 62년(1926-1987)이었다. SAPPAND01과 02의 고사 시기는 각각 2016년 가을-2017년 봄과 2015년 여름-가을이었으며, SAPPPKD03의 고사 시기는 1987년 가을-1988년 봄이었다. 100 cm까지 수고생장을 하는데 소요되는 기간은 SAPPAND01이 41년으로 가장 길었으며, SAPPAND02와 SAPPPKD03은 각각 17년과 18년으로 조사되어 수종보다는 개체 간 차이가 큰 것으로 확인되었다. 하지만, 대상목 모두에서 수고 20 cm 전후까지 생장하는데 소요되는 기간은 공통적으로 긴 것으로 나타났다. 본 결과는 향후 우리나라 아고산대 침엽수 수령조사의 정확성을 향상 시키는데 중요한 기초자료가 될 것이다. This study aimed at investigating the height-growth duration of Abies nephrolepis and Pinus koraiensis which are the tree species growing in the subalpine area at Seorak Falls of the Seoraksan National Park. For the study, two dead Abies nephrolepis (SAPPAND01, 02) and one dead Pinus koraiensis were selected. To investigate the height-growth duration, 9 disks were collected at the height of 0, 10, 20, 30, 40, 50, 60, 80, 100 cm height from the collar to upward from the sample trees, and then their ring-width were measured. The site master chronology used to the reference to date the death years of the sampled trees was established using the increment cores from 15 living Abies nephrolepis. Through the tree-ring analysis, the ages of SAPPAND01 and 02, and SAPPPKD03 were verified 102 (1915-2016), 97 (1918-2014), and 62 years (1926-1987) years, respectively. The death seasons and years of SAPPAND01 and 02, and SAPPPKD03 were autumn in 2016 - spring in 2017, summer - autumn in 2015, and autumn in 1987 and spring in 1988, respectively. The height-growth durations up to 100 cm from the collars of SAPPAND01 and 02 and SAPPPKD03 were -41, 17, and 18 years, respectively, so that it was verified that the height-growth duration was not changing depending on tree species but individual trees. During the juvenile periods growing up to approximately 20 cm from the collar, however, all sample trees showed relatively taking long times. All results obtained from this study would be fundamental data to improve the accuracy of examining the age of conifers in the subalpine areas.

미세혈관 협심증 환자의 임상상 및 지표에 관한 연구

박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.

저방사화강(JLF-1)의 고온 피로균열진전거동에 관한 연구

박원조,정재욱,허선철,허정원 경상대학교 해양산업연구소 2002 해양산업연구소보 Vol.15 No.-

The objective of this study is to investigate life and fatigue crack propagation in the Reduced Activation Ferritic steel(RAFs) JLF-1. Crack growth rate tests on compact tension specimen of thickness 12mm were conducted by using sinusoidal waveform. Compact tension specimens were used and crack growth rate da/dN and stress intensity factor range ΔK were analyzed concerning to the R value of 0.1, 0.3 and 0.5 In order to find out the value of ΔK, load amplitude constant method was applied by the standard fatigue testing method describes in ASTM E647-95a. The effects of stress ratio and specimen size on the fatigue crack growth propagation for JLF-1 steel were discussed within the Paris law. As the result of this study, fatigue crack growth rate increased with in creasing the load ratio, Consequently, fatigue crack propagation of half size specimen was similar to those of full size specimen at room temperature. Also, there was no difference between base metal and weld metal at room temperature and high temperature.(400℃)

한국산 나비 目(Lepidoptera)의 발향린(Androconia)에 관한 주사전자현기경적 연구 III. 네발나비科

박원학,류성만,서경인,이종욱 嶺南大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.12 No.-

한국산 네발나비과에 보고된 77종 중 북한산 12종과 채집하지 못한 21종을 제외한 44종, 670여 개체를 재료로 광학현미경으로 발향린의 유무 및 분포를 확인하였다. 이중 발향린이 관찰된 10종을 대상으로 주사전자현미경으로 그 형태를 비교 연구하였다. 1. 발향린이 관찰된 종은 Brentis ino(R.), Argyronome laodice (P.). A. ruslana (M.). Damora sagana (D.), argynnis paphia (L.), Childrena zenobia (L.), Speyeria aglaja (L.), Fabriciana pallescens (B.), F. adippe (L.), F. nerippe(c.et R. F.) 10종이다. 2. 발향린은 암컷에서는 관찰되지 않았고, 수컷이 앞날개 표면에서만 관찰되었으며, 시맥위에서만 분포한다. 3. 확인, 관찰된 10종의 발향린은 나발막(fimbriae), 경부(neck), 잎새(laminar), 자루병반(foot stalk) 등 발향린의 전형적인 모양을 나타내었으며, 동종내 개체간 변이는 관찰되지 않았다. 4. Argyronome laodice, A. ruslana, Damora sagana, argynnis paphia, Childrena zenobia, Fabriciana pallescens 등 6종에서는 2가지 형태의 발향린이 관찰되었다. 5. 본 연구에서 관찰한 10종은 Subfamily Argynninae아과의 Argynnini족에서만 관찰되었으며, 관찰된 발향린중 Type ⅠⅠ의 형태는 종간에 큰 차이점이 없었고, Type Ⅰ은 많은 형태적 차이를 보이므로 분류학적으로 중요한 형질이라 사료된다. this paper observed through microscope the existance and the distribution of the androconia of the 44 species Nymphalidae among 77 ones that have been reported in Korea, excluding 12 species in North Korea and 21 one's not collected ten species that were observed the androconia among those were chifely compared and studied through Scanning Electron Microscope. 1. The 10 species that observed androconia is Brentis ino(R.), Argyronome laodice (P.). A. ruslana (M.). Damora sagana (D.), Argynnis paphia (L.), Childrena zenobia (L.), Speyeria aglaja (L.), Fabriciana pallescens (B.), F. adippe (L.), F. nerippe(C. et R. F.) 2. The androconia was not found at the female, but only on the dorsal surface of male's fore wings. 3. The androconia of 10 species was not observed intraspecific seasonal variation and individual variation. It was appeared the androconia as general type of fimbriae, neck, laminar and foot stalk. 4. Two types(typeⅠ and Ⅱ) of androconia were observed at the species of Argyronome laodice, A. ruslana, Damora sagana, Argynnis paphia, Childrena zenobia, Fabriciana pallescens. 5. According to this study, the androconia of 10 species observed only Argynnini, subfamily Argynniae. The type Ⅱ of the androconia similar to between species but type Ⅰ was observed multitudes of morphological difference. These difference of type Ⅰ was very important taxonomical characters.

강진만에서 미생물의 년 변화

박종천,오재영,정용욱,주현수,이원교,유춘만,이우범 國立 麗水大學校 환경문제硏究所 2001 環境硏究論文集 Vol.4 No.-

The biological surveys were performed at seven sites in the Gangjin bay from February, 1998 to November, 2001. In order to analysis of environmental variation, numbers of heterotrophic bacteria, general fungus and fecal coliforms were enumerated in each sample. The result showed that variation range of heterotrophic bacteria, general fungus, and fecal coliforms were 2.9 x 10^(3)~9.6 x 10^(3) CFU/ml, 17.2~80.1 CFU/ml, and 6.3~682.5 CFU/100ml for four tears(1988~2001), respectively. Density of heterotrophic bacteria and general fungus were gradually decreased for four tours, while fecal coliforms were suddenly increased. Specially, numbers of fecal colifoms were increased the more 100 times in 2001 than that 1998. We think that it was probably caused a little rainfall in February, 2001. There result suggests that ecosystem of Gangjin bay were mainly regulated by 2~3 factors, which were inflow of fresh water, salinity and variation of water temperature.

의미 치매 1예 : 신경심리 및 뇌영상 검사의 연속적인 추적 관찰 소견 Serial Follow-up Study of Neuropsychological and Neuroimaging Findings

박경원,김욱주,전진민,강도영,김재우 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.1

Semantic dementia (SD) is a very rare, distinct form of dementia which is characterized by impairment of naming and comprehension, prosopagnosia, visual agnosia for objects and relative preservation of other aspects of cognition, such as episodic memory, nonverbal problem-solving and visuospatial functions. A 68-year-old man visited our clinic for progressive speech disturbance since 1997. His main speech problems were word finding difficulty and loss of word meaning for objects. Language assessment demonstrated profound semantic memory loss for words with preserved fluency, corresponding to anomic aphasia. There were marked impairments in verbal and visual memory functions and word fluency tasks, but no grammatical or phonologic errors in speech. Also were remarkable anosognosia and object visual agnosia with preserved visuospatial function and calculation in neuropsychological tests. Serial follow-up study of language test showed more deterioration in comprehension and repetition, consistent with Wernicke's aphasia. Initial brain MR imaging and brain perfusion SPECT showed prominent focal atrophy in the left temporal lobe, and marked hypoperfusion in the left temporal and both frontal areas. Follow-up brain MR imaging and perfusion SPECT revealed more atrophy in both temporal lobes and showed more extensive hypoperfusion areas compared to the previous study.

온도 변화에 따른 DW-100 용접재의 기계적특성에 관한 연구

박원조,정재욱,변상열,허선철,유재환 경상대학교 해양산업연구소 2002 해양산업연구소보 Vol.15 No.-

In recent years, the studies of mechanical property of weld materials were one of the most important basic test of our welding indursty. The used specimen in this study is weld metal of DW-100 flux cored wire which is using for flux cored are welding and one type of flux cored wires were used in this test. This paper is based on the quality of the mechanical property of welding material under the different temperture, test temperature of each weld metal is from RT to 900℃ and temperature gap is 100℃ for each weld metal. It is particularly important to assess tensile properties and each specimen was examined using by the following methods; Reduction of area rate, Tensile strength test, and observation of SEM. All tensile tests were performed in accordance with the ASTM standard test method, tension testing of metallic materials (ASTM I-8). This study proves that the mechanical properties of until 400℃ were good as the increasing temperature compare with mechanical properties of RT. As the results of this study, the tensile strength of 300℃ was higher than other weld metals. Also the reduction of area rate was the lowest at 300℃ according to the previous test results. Consequently, this weld metal is a good substitute for the existing welding materials until 400℃ which is used in the development of welding industries today.

전동공구 내구성 평가 실험장치 개발

박근석,변영철,강이석,강배희,이동욱,차원준 忠南大學校 産業技術硏究所 1997 산업기술연구논문집 Vol.12 No.2

For the endurance test, it is necessary to test the portable electric tools under the same condition as the actual operation condition. It is also essential that the test equipment is convenient to fix the tool. Those are necessary to control the loaded torque and to acquire and analyze the test data with a computer. In this study, we have developed an endurance test equipment for portable electric tools, where a hydraulic control system with a proportional relief valve was applied to control the load for the test. The developed test equipment used an industrial hydraulic pump as a load supplier to ensure a firm endurance of the test equipment itself. The data acquisition system has been automated by composing with a personal computer and RS-232C communication nets. This test equipment reduced the manhour for the test and also improved the reliability of the tested data which were measured and graphed.

한국인 관상동맥질환의 위험 요인에 대한 환자 : 대조군 연구

박혜순,김영식,민원기,이철환,박성욱,박승정 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.6