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.

미생물을 이용한 페놀 폐수지처리에 관한 연구

박상헌,심학보,이수구,서성조 서울산업대학교 산업대학원 1992 大學院論文集 Vol.1 No.1

본 연구는 혼합 미생물을 이용한 페놀 함유폐수의 생물학적 처리에 관한 연구로서, 높은 페놀 농도에서의 이를 분해시킬 수 있는 균주를 개발하고 페널 함유폐수의 효과적인 처리를 위한 실험연구이다. 각종 공장폐수, 슬러지, 토양 등 40여종의 시료로부터 페놀 분해균을 선별하였으며, 페놀농도를 단계적으로 높여 미생물을 적응시킨 결과, 페놀농도 1,000ppm의 높은 농도에서도 잘 증식하며 페놀을 효과적으로 분해시킬 수 있었다. 혼합 미생물을 분리 동정한 결과, 우점종은Pseudomonas PI인 것으로 나타났다. 회분식 실험에서 초기 페놀농도, 균체량 및 glucose 농도 등을 변수로 실험하였느데, 페놀 분해속도는 시간에 따라 증가함을 나타내었다. 또한 페놀이 완전 제거되는데 소요되는 시간은 초기 페놀 농도에 비례하였으며, 균체 주입량에 다른 초기 MLSS농도의 대수식으로 나타낼 수 있었다. 연속식 활성 슬러지법에 의한 실험에 있어서, 본 실험조건에서 페놀이 완전 제거되는데 필요한 반응기내의 체류시간은 유입 페놀농도 500ppm인 경우 20시간이 소요되는 것으로 나타났다. This investigation was carried out to study the biodegradation of phenol in wastewater using mixed microorganisms. The mixed clutures of phenol degrading microorganisms were selected from various sources such as industrial wastewaters, sludges and soils. The mixed cultures could be adapted to high concentration of phenol by increasing the phenol concentration step by step. The phenol was degraded easily even up to 1,000ppm of phenol using these microorganisms. The predominant bacteria was isolated and characterized as Pseudomonas PI. In a batch system, the removal rate of phenol increased with time due to the lag time of microorganism adapation. The duration time during which phenol could be completely removed was linearly proportional to the initial phenol concentration. And the duration time(td) could be expressed as a funtion of logarithmic initial MLSS concentration(x) as follows. td=?? [8.68-In(x)] In a continuous system, the required residence time to remove phenol completely was found to be 20 hours and 35 hours 500 ppm and 800 ppm of influent phenol concentrations, respectively.

국내에서 생산 판매되는 담배 각초에 존재하는 보습제 함량 비교

박병주,임흥빈,이학수 충북대학교 연초연구소 2006 煙草硏究 Vol.20 No.-

This study was carried out to compare humectant contents existed in tobacco shred from 69 cigarette brands being on sale in Korea. Humectant in tobacco shred were extracted by AOAC official method and analysed by gas chromatography. Mean value of glycerol, propylene glycol, and triethylene glycol contents from 69 cigarette brands were 13.6 ± 4.5 mg/g, 6.5 ± 2.6 mg/g, and 0.8 ± 0.2 mg/g, respectively. Humectant contents existed in tobacco shred of cigarette brands manufactured by small tobacco companies were relatively lower than that of the other four major tobacco companies in Korea. These results indicates that humectant contents in tobacco shred from cigarette have to determine periodically in order to give a basic information for quality evaluation of cigarette smoke in connection with smoking and healths, because it plays an important role the formation toxic cigarette smoke components. 본 실험은 국내에서 시판되고 있는 69종의 궐련담배 각초를 재료로 하여 실시하였다. 궐련담배 각초에 함유되어 있는 보습제의 함량을 측정하고 궐련담배 주류연의 tar 및 nicotine 함량을 측정하여 비교분석한 결과는 다음과 같다. 1. 국내에서 시판되는 귈련담배 각초 보습제 성분의 평균함량은 glycerol 13.6±4.5 mg/g, propylene glycol 6.5±2.6 mg/g, triethylene glycol 0.8±0.2 mg/g이었다. 2. 군소업체 귈련담배 각초에 존재하는 보습제 함량은 대규모업체에 비해 상대적으로 매우 낮은 수준을 유지하고 있었다

잡초성벼의 superoxide dismutase cDNA cloning과 재배벼로의 형질전환

박상규,박종석,이승인,서석철,김병극,조윤래,서학수 한국환경농학회 2002 한국환경농학회지 Vol.21 No.2

냉해나 한발등의 환경스트레스에 대해 저항성을 유발하는 유전자를 환경스트레스에 강한 잡초성벼로부터 선발하고 이들 유전자를 재배벼에 도입하여 도입유전자 산물의 과량 발현을 통해 냉해나 한발 등에 대한 저항성이 향상된 벼를 선발하고자 하였다. 잡초성벼인 Bhutan 14Ad로부터 냉해 및 한발 저항성 유전자로 알려진 superoxide dismutase (SOD) cDNA를 분리하고자 mRNA를 분리하고 이 분리된 mRNA를 이용해 reverse transcriptase PCR방법으로 SOD cDNA를 cloning 하였다. 그 결과 2종의 SOD cDNA가 cloning되어 SOD-A, SOD-B로 명명하였다. 이들 cDNA의 염기서열을 결정한 결과 이들은 아미노산 서열 상동성이 88.4%를 나타내었으며, SOD-A는 oryza sativa 계열의 Cu/Zn SOD유전자인 GenBank accession No. L36320와 99.3%로 동일하였으며, SOD-B는 accession No. D01000과 100% 동일하였다. 이들 SOD-A와 SOD-B cDNA를 재배벼인 낙동벼에 형질전환하여 형질전환체 벼를 선발하였으며, 이들 형질전환체 벼의 냉해저항성 및 한발저항성 검정을 통해 저항성이 향상된 형질전환체 벼를 선발하고 있다. Two different cDNA clones for superoxide dismutase (SOD) were isolated from an weedy rice variety (Oryza sativa, cv. Bhutanl4Ad) and were introduced into a cultivated rice variety (Oryza sativa, cv. Nakdong) in order to develop the environmental stress-resistant rice plants. Sequence analysis of the cloned cDNAs indicated that the deduced amino acid sequence of SOD-A is 88.4% identical to that of SOD-B. Furthermore, the nucleotide sequence of SOD-A is 99.3% identical to that of a Cu/Zn SOD gene of Oryza sativa (GenBank accession No. L36320). The nucleotide sequence of SOD-B was identical to that of the previously published SOD gene (Accession No. D01000). A cultivated rice variety, Nakdong-byeo, was transformed with chimenc SOD genes containing a actin promoter of rice and pin2 terminator using a particle bombardment technique. Transformed calli were selected on an selection medium containing phosphinothricin (PPT). Transgenic rice plants were regenerated from the PPT-resistant calli. PCR analysis with genomic DNAs from transgenic plants revealed that transgenes are introduced into rice genome.

약물 수송 및 분자 영상기법을 위한 나노 기술적 접근

박학수,황성주,박정숙 충남대학교 약학대학 의약품개발연구소 2007 藥學論文集 Vol.22 No.-

Nanotechnology, a multidisciplinary scientific undertaking, involves creation and utilization of materials, devices or systems on the nanometer scale. The field of nanotechnology is currently undergoing explosive development on many fronts. The technology is expected to create innovations and play a critical role in various biomedical applications, not only in drug delivery, but also in molecular imaging, biomarkers and biosensors. Target-specific drug therapy and methods for early diagnosis of pathologies are the priority research areas where nanotechnology would play a vital role. This review considers different nano-technology-based drug delivery and imaging approaches, and their economic impact on pharmaceutical and biomedical industries.

뇌파기술훈련이 골프선수의 경기성과에 미치는 영향

박범영,왕석우,신학수 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

The Purpose of this study is to suggest the effectively Psychological Program that compare and analyze the Player's Psychological condition and Athletic Accomplishment among EEG feedback training for 8 weeks on golf Player. The subjects of this study were 16 golf Player, and separated 2 Group. They have examined Golf Rounding test(Driving Accuracy. Green in Regulation, Putting, Score) at pre and post. For the statistical test. the Paired t-test and independent t-test were conducted. The results of the study are as follows. The EEG feedback training group was significantly differences in Driving Accuracy,(t=-8.871, P<.001) Putting(t=2.333, P<.05) and Score(t=4.117, P<.001), also the Control group was significantly differences in Green in Regulation(t=-5.978, P<.001) and Score(t= 2.516, P<.05). But the EEG feedback training group was not significantly differences in Green in Regulation(t= -1.338, P>.05). also the Control group was not significantly in Driving Accuracy(t=-2.290, P>.05) and Putting(t=-1.413, P>.05).

생분해성 폴리락타이드/폴리에틸렌글리콜 공중합체 마이크캡슐의 제조와 방출거동에 대한 연구

박수진,김승학,홍성권 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.4

본 연구에서는 생분해성 poly(L-lactide) (PLA)/poly(ethylene glycol) (PEG) 마이크로캡슐을 액중건조법으로 제조하고, PLA 마이크로캡슐에 PEG를 첨가함에 따른 분해거동, 크기분포 그리고 방출거동에 미치는 영향을 살펴보았다. 그 결과, PLA/PEG 공중합체는 PLA보다 친수성이 크게 나타났고, 낮은 유리전이 온도를 가짐을 알 수 있었다. PLA/PEG 마이크로캡슐의 표면은 PLA 마이크로캡슐보다 부드럽지 못했고, 제조된 PLA와 PLA/PEG 마이크로캡슐의 평균크기는 40과 57 ㎛이었으며, 또한 구형의 형태를 나타내는 것이 image analyzer와 SEM을 통하여 관찰되었다. PLA/PEG 마이크로캡슐의 약물 방출거동은 UV/Vis. spectra를 통하여 살펴보았고, 방출 속도는 PEG의 첨가에 따라 두드러지게 증가하였는데, 이는 친수성기의 증가와 PEG의 팽윤성으로 설명되어질 수 있다. In this work, biodegradable poly(L-lactide) (PLA)/poly(ethylene glycol) (PEG) microcapsules were prepared by emulsion solvent evaporation method. The effect of PEG segments on the degradation, size distribution, and release behavior of the microcapsules was studied. According to the experimental results, PLAPEG copolymers were more hydrophilic and exhibited lower glass transition temperatures compared to PLA homopolymer. The surface of PLAPEG microcapsules was not as smooth as that of PLA microcapsules. The mean diameters of the PLA and PLA/PEG microcapsules were 40 and 57 pm, respectively. The spherical forms were observed by image analyzer and scanning electron microscope (SEM). Drug release from microcapsules was determined by UV/Vis spectra. It was found that the drug release rates of the microcapsules were significantly increased with adding of PEG, which could be attributed to the increase in their hydrophilicity and swelling characteristics.

Passive Sampler를 이용한 환경대기 중 VOC 분석에 관한 연구

박민수,김학민,김선태 大田大學校 環境問題硏究所 1999 환경문제연구소 논문집 Vol.4 No.-

Resently VOCs become one of the most interesting compounds in the atmospheric environment because of its toxicity, carcinogenesis, durability, dispersion characteristics and accumulation in human body with very low level. Also, it was proved that VOCs act as the precursors of oxidants forming. So kinds of analysis methods were recommended and carried out toward the standardization, generally the thermal desorptin/GC/MS(or FID) system is recommended as a standard method. Nevertheless, because this method needs an expensive special equipment and continuous maintenance, it makes difficulties to measure spatial distributions of VOCs in ambient air. Therefore in this study we evaluated the passive sampler which were designed as a measuring tool of working area conditions, on the prupose of measuring the spatial distribution or average concentration of VOCs in the ambient air. This study was carried out to estimate the sampling period of pasive sampler, to evaluate repeatability, reproducibility of GC/FID analysis results, and to examine calculation procedure. AS the results, the sampling period must be satisfied to capture more than 1ppm(gn/㎕) of VOC in the liquid sample, so at least 7days or more are needed in ambient air sampling. The repeatability and reproducibility which are examined by relative standard deviation(%) with a poing of retention time and peak area at within-run and between-ren anaysis were proved to be suitable. And the calibration method was examined by least square, logarithmic and constant slope method, among these methods the outcome of least square method was superior(r value exceeds 0.998).

골프 지속 행동에 영향을 미치는 참여결정요인 분석

박수정,김학운 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study was to Exploratory analysis of the determinants on golf participants, in order to meet this purpose, this study used qualitative research method. Comprehensive selection strategy was used for selecting of research informants. The participants of this study are consisted of 2 males and 3 females of which have engaged in golf, This study employed In-Depth interview Method. On the basis of the procedure, the conclusions were drawn as follows; The participation determinants factors of golf participants were 4: significant others, goal, ecstacy, competition. The conclusion suggested that understanding of various experience such golf participants go through is deemed highly meaningful as it will trigger a change in terms of concepts of leisure as well as behavior towards leisure in a positive way, which will, in turn, change overall life patterns of individuals while enhancing quality of life.

해고에 대한 생존자들의 반응

김학수,박미라 경남대학교 산업경영연구소 2000 産業經營 Vol.27 No.-