지상라이다를 이용한 미기록 외래종 갯쥐꼬리풀(Spartina Alterniflora)의 분포특성과 관리방안 연구 -다도해 해상국립공원 진도 남동리 해안을 사례로-

박정원 ( Jung Won Park ),김하송 ( Ha Song Kim ),장성건 ( Seong Geon Jang ),천숙진 ( Sook Jin Chun ),육관수 ( Kwan Soo Yuk ) 한국도서(섬)학회 2015 韓國島嶼硏究 Vol.27 No.3

Spartina alterniflora is native to the Atlantic coast from Newfoundland, the south of Canada and northern Argentina. There it forms a dominant part of brackish coastal saltmarshes. Due to its strong growth, the Spartina alternifolra was introduced to the rider area and coast as a use for ecological engineering. The Spartina alterniflora community can crowd out native species, reduce the biodiversity of saltmarsh and alter the environment. As a result, the invertebrates living in mud flats disappeared due to the encroaching of Spartina alterniflora, and the birds which eat off invertebrates went along as well. The Spartina alterniflora was first introduced in South Korea in 2008 and is known to have flowed in the Dadohaehaesang National Park. Compared to 2008, in 2015 the distribution area of the Spartina alterniflora has increased 550 times. (11.54㎡ in 2008 to 6,394.22㎡ in 2015). The large increase of Spartina alterniflora calls for urgent management and additionary study on the subject. Thus, this study analyzed the geo-spatial information on the Spartina alterniflora such as its distribution area, the height of habitats and expected expansion area, and can act as the preliminary data for management.

미용사들의작업관련성 근골격계 장애에 관한 연구

박수경,최영진,문덕환,전진호,이종태,손혜숙 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.3

목적 : 미용사의 작업관련 근골격계 장애 실태와 관련 요인을 알아보고자 한 것이다. 방법 : 최종 대상이 된 미용사 267명에 대하여 2000년 3월부터 5월까지 Karasek의 J7Q와 N10SH의 표준화 설문지를 이용하여 일반적 특성, 직무관련 스트레스, 근골격계 장애 자각증상 등을 자기 기입식으로 작성하게 하였다. 결과 : N10SH 감시기준에 의한 근골격계 자각 증상 호소율은 전체적으로 94.4%으로 높은 편이었으며, 각 신체부위별로는 어깨 부위(61.0%), 목 부위(59.9%), 허리 부위(53.2%), 손 및 손목 부위(41.6%)의 증상 호소율이 비교적 높게 나타났으며, 상대적으로 무릎 및 허벅다리 부위(36.7%), 발 및 발목 부위(34.8%), 등 부위(28.8%), 팔 및 팔꿈치부위 (28.5%), 종아리 부위 (28.5%), 손가락 (22.8%) 등은 낮았다. 다변량 분석 결과, 미용사들의 WRMDS는 직무 스트레스와 건강관련 습관 등에 영향을 받은 것으로 관찰되었으며, 부위별로 목부위는 직무의 불안정성, 허리부위는 여자, 음주, 결정의 허용범위, 손 및 손목부위는 음주, 무릎 및 허벅다리 부위는 흡연, 발 및 발목부위는 흡연, 결정의 허용범위, 그리고 등부위는 직무의 불안정성 등이 유의한 요인으로 관찰되었다. 결론 : 주관적인 증상 호소만을 이용한 제한점에도 불구하고 산업보건의 명확한 대상이 되지 않고 있는 미용사 등의 서비스업 종사자에 대한 WRMDS 연구의 기초자료로서 활용될 수 있을 것이다. Objectives : To determine the prevalence and related factors of work related musculoskeletal symptoms in hairdressers. Methods : Informations on general characteristics, job strain, and musculoskeletal symptoms were obtained by a self-administered questionnaire, through adopting NIOSH instrument and JCQ (Job content questionnaire) , from 267 hairdressers, between March and May, 2000. Results : The symptom prevalence by N10SH surveillance criteria in total was high as 94.4%; shoulder (61.0%), neck (59.9%), low back (53.2%), hand and wrist (41.6%), etc. In multiple logistic regression, significant factors affecting the symptoms by body region , job insecurity on neck; gender, alcohol, decision latitude on low back; alcohol on hand and wrist; smoking on thigh and knee; smoking, decision latitude on ankle and foot; job insecurity on upper back. Conclusions : Musculoskeletal symptoms of hairdresser were highly prevalent, and associated with job strain and their health habits. This Is a basic data of work related musculoskeletal disorders among hairdressers who are not the subjects of occupational health service at the present time in Korea.

밤 전분의 이화학적 특성

박인순,김성곤,김춘수 한국응용생명화학회 1982 Applied Biological Chemistry (Appl Biol Chem) Vol.25 No.4

밤(품종, 은기) 전부의 성상, 이화학적 특성 및 전분 겔의 노화속도를 조사하였다. 전분의 입자는 장축 및 단축의 비가 1.4:1인 불규칙한 타원형으로서 크기는 2.9~21.4μ(평균 10 μ)이었다. X-ray 회절도는 2θ가 5.6°, 15.3°, 17.2°, 22.0°, 23.8°에서 peak를 보였으며, B형에 속하였다. 전분의 아밀로스 함량은 22.7%, 물 결합 능력은 81.5%, 호화온도는 55℃이었다. 전분의 swelling은 55℃까지는 큰 변화가 없었고, 이후 급격히 증가하였으나 65℃ 이후에는 그 변화가 완만하였다. 아밀로그라프에 의한 전분의 호화는 농도(5 및 6%)에 관계없이 비슷한 양상을 보였으며, 최고 점도는 나타나지 않았다. 밤 전분은 입자간의 결합강도가 강하며, 열 및 shear force에 의한 swollen granule의 저항성이 큰 특징을 보였다. 전분 겔(건물중으로 45%)의 노화 시간상수(속도 상수의 역수)는 21℃에서 1.68일이었다. Physicoshemical properties and aging of chestnut, Castanea cretana(Eungi), starch were investigated. The starch granules were irregular oval shape with the ratio of short and long axis of 1 : 1.4 and the size of 2.9-21.4μ(average 10μ). The starch showed a typical B-type X-type diffraction pattern. Amylose content and water binding capacity were 22.7% and 81.5%, respectively. The optical transmittance of 0. 1% starch suspension increased rapidly from 55℃. The swelling power of the starch repidly increased betwen 55℃ and 60℃, and its increase slowed down thereafter. Amylograms of starch at 5% and 6% concentrations indicated that the starch was stable against heat and shear force. The viscosity at 6% concentration was over twice higher than that at lower concentration. The time constant(reciprocal of rate constant) for 45% starch gel stored at 21℃ was 1.68 days.

펌프 吸水槽內의 渦流現象에 관한 硏究

朴春根,徐利洙,朴仁東 동아대학교 공과대학 부설 한국자원개발연구소 1986 硏究報告 Vol.10 No.1

It is important to design a pump suction sump with proper dimensions and configuration which will greatly influence the pump performance. This study was carried out to examine pump performance caused by vortex phenomenon and to research relation between critical submergence and width of suction sump, bell to bottom clearance, bell to rear wall clearance and suction bell outer diameter. The results obtained by this experiment are as follows. Sc is decreased with the increase of suction sump width x, and though the variation of Sc with variation Y is not clearly observed, in general, Sc tends to decrease with the increase of Y. Sc is increased with increase of Z and velocity, but Sc is decreased with the increase of D.

웨이브릿 변환 영역 적응필터에 의한 유한 임펄스 응답 필터시스템 확인

박순규,박남천,이수흠 慶南大學校 附設 工業技術硏究所 1998 硏究論文集 Vol.15 No.2

기존의 시간영역직 접형 유한 임펄스 응답 적응필터는 그 구조가 매우 간단하기 때문에 여러 분야에 응용되고 있으나, 이 적응필터는 일반적으로 수렴률이 매우 늦다. 변환영역 적응필터는 적응 알고리듬의 수렴속도 증가를 위해 유익하게 사용된다. 웨이브릿 변환은 프로세스가 비정적인 경우에도 Karhunen-Loeve변환과 매우 유사하다. 그러므로 웨이브릿 변환된 출력의 자동상관 마트릭스는 거의 대각이며, 변환 영역에서 간단한 전처리를 하면 수렴률을 매우 향상시킬 수 있다. 또한 변환에 Harr 웨이브릿을 이용하면 곱셈없이 변환이 가능하다. 이 논문에서는 웨이브릿 변환 영역 적응필터를 구성하고, 이를 유한 임펄스 시스템 확인에 적용하였다. 컴퓨터 시뮬레이션 결과를 DET 영역 적응 유한 임펄스응답 적응필터에 의한 결과와 함께 나타내었다. The conventional time domain direct-form FIR filter has been used for a variety of application, since it presents a very simple implemention, however, in general, the convergence rate of this adaptive filter is very slow. The transform domain adaptive filter can be used advantageously to increase the speed of convergence of the adaptive algorithm. The wavelet transform behaves as a good approximation to Karhunen-Loeve(KL) transform even when the underlying process is nonstationary. Therefore, the autocorrelation matrix of the wavelet transformed output is nearly diagonal. By using a simple preconditioning in the transformed domain, the conditioning can be improved resulting in dramatic increase in the convergence rates. And by using the Harr wavelet, we can transform without multiplication arithmetic. In this paper, a wavelet transform domain adaptive filter has been constructed and applied to the FIR filter system identification. Computer simulation results are shown with the results obtained by the DFT domain adaptive FIR filter.

非定常流의 亂流領域에서 오리피스 形狀에 따른 損失 및 流量에 관한 實驗的 硏究

朴春根,徐利洙 東亞大學校 大學院 1984 大學院論文集 Vol.8 No.2

To loss and discharge coefficients of several types of orifices are studied experimentally for Reynolds numbers for 10⁴to 10?, and square-edged and sharp-edged orifices are varied thickness and angle of inclinations. experimental results, for thickness front direction of flow scarcely ever be varied loss and discharge coefficients, but back direction of flow are changed loss and discharge coefficients when angle of inclination are varied, for back direction of flow if angle of inclination be increased, loss coefficients be decreased and discharge coefficients be increased.

래크 생산시스템의 생산능력 결정에 관한 연구

전태웅,박수희,이항진 조선대학교 경영경제연구소 1999 經營經濟硏究 = Management and economics research Vol.22 No.2

This study is concern to determine production capacity for rack production system using simulation. In rack production system, generally, the production capacity is determine by the number of operatior and the time of operator, that is decision parameters. The fourth-four alternatives that is eleven alternatives to the number of operator and four alternatives to the quaranty of production is simulated in this study. The overhead cost is decision criteria in the selection to alternatives.

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.

면역 부전 환자에서 병발한 급성 황색 포도상 구균에 의한 세균성 식도염 1예

박환양,김춘관,박영배,박재완,김성훈,강정원,문경협,양수현,변종훈 대한감염학회 2001 감염 Vol.33 No.5

Bacterial esophagitis is an uncommon disease and has not been well characterized. Bacterial infection of the esophagus is usually presented as a superimposed infection upon a preexisting viral or fungal esophagitis and most patients are immunocompromised hosts. A 67-year-old man was admitted for retrosternal pain and hematemesis, who had a past history of long-standing diabetes mellitus and end stage renal disease, also had a history of steroid medication. Extensive esophageal ulcerations of the mucosa were visualized by endoscopy. Staphylococcus aureus grew in blood culture. After the 2 weeks of antibiotics treatment, he was successfully recovered without any sequelae. Due to its rarity, this case is herein reported with a review of the corresponding literature. (Korean J Infect Dis 33:360∼363, 2001)

유전자 알고리즘과 신경망이론의 결합에 의한 영산강의 DO, BOD 농도예측

박성천,하수정 東新大學校 工業技術硏究所 2002 工業技術硏究 Vol.8 No.-

As the industrialization and the urbanization has increased, the water has been increasingly used, discharged industrial wastewater and filthy water of our daily life have been seriously polluted the water quality, the increased load quantity of polluting materials has caused the eutrophication of rivers, and so the natural purification ability of a river system has reached its limit. Accordingly, measures to prevent the water pollution resulting from sewage and wastewater and to effectively control the water quality are required. In this study, in order to develop a model for presupposing the water quality of a river, I intended to presuppose the density of DO, BOD, T-N, and T-P of Youngsan river, by using a genetic algorithm which is one of conceptual models and a nerve-network theory. As a result, I could find out that the coefficient of correlation for the items of water quality which I intended to presuppose was 0.87 and more, which is highly reliable. It means that the model which was developed in this study and combined the genetic algorithm and the nerve network was excellent for being applied to presupposing the water quality of a nonlinear river as it could find out the fittest parameter needed for the presupposition. Accordingly, I think that, if the model developed in this study is applied to a river and the construction of its daily or hourly data is preceded, a better model will be developed and the water quality of a river will be controlled more actively.