종 분포 모형을 이용한 구상나무림의 지속 및 쇠퇴에 관한 연구 - 전라남도 광양시 백운산을 중심으로 -

조선희 ( Seon Hee Cho ),박종영 ( Jong Young Park ),박정호 ( Jeong Ho Park ),이양근 ( Yang Geun Lee ),문이만 ( Lee Man Mun ),강상호 ( Sang Ho Kang ),김광현 ( Gwang Hyun Kim ),윤종국 ( Jong Guk Yun ) 한국산림과학회 2015 한국산림과학회지 Vol.104 No.3

The present study investigated the habitats of Korean fir trees (Abies koreana E. H. Wilson) on Mt. Baekwun (Baekwun-san), determined the current distribution, quantified the contribution of biological and nonbiological environmental factors affecting the distribution, derived actual and potential habitats, presented a plan for the establishment of protected areas, applied RCP 8.5 climate change scenario to analyze the effects of climate change on the future distribution of Korean fir trees, and predicted future potential habitats. According to the results of the study, 3,325 Korean fir trees (DBH >= 2.5 cm) inhabited Mt. Baekwun, and their distribution area was approximately 150 ha. Populations of Korean fir trees were confirmed to exist at an altitude of 900 m above sea level and were distributed up to 1,200 m. Based on potential distribution, areas appropriate for habitation by Korean fir trees were analyzed to be 450 ha, three times the current distribution area, with a focus on Sang Peak (Sang-bong), Eokbul Peak (Eokbul-bong), Ddari Peak (Ddari-bong), and Dosol Peak (Dosol-bong). The forest stands near Sang Peak, the main peak, were evaluated as those with the most appropriate potential for the habitation of Korean fir trees, and populations of the trees tended to prefer the northern slope rather than the southern slope. When climate change scenario RCP 8.5 was applied and future potential distribution was analyzed, the habitats were expected to decrease in area to 20 ha by 2050, with a focus on Sang Peak, and areas appropriate for habitation were predicted not to exist by 2080. Judging from such results, as global warming accelerates, the habitats of Korean fir trees are clearly expected to move from lowlands to highlands.

사업장 소음 폭로에 의한 일과성 역치 상승과 회복

조수헌,하미나,한상환,주영수,성주헌,강종원,윤덕로,송동빈,이명학,김선태 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.2

To determine the recovery time from noise-induced temporary threshold shift(TTS), a prospective field study was conducted at three worksites where workers are known to be exposed high level of noise. Subjects were selected according to answers on a questionnaire which inquired about otological history and previous noise exposure, including avocational, military and occupational exposures. After excluding employee with past otologic problems, recent exposure to high level noise, and under medications, total 92 employees participated in the study. Among 92 participants, complete consecutive audiometric examinations were carried out at 0∼2 hours, 5∼7 hours, 14∼16 hours after worktime noise exposure on 26 participants wearing hearing protectors and 22 participants wearing no protective devices. The difference between the hearing level 0∼2 hours after noise exposure and 5∼7 hours is statistically significant by paired t-test(p<0.01). The median recovery times calculated from the data of 22 participants wearing no protective hearing devices are 15.6 hours at 4000Hz, and 7.7 hours, 10.3 hours, 8.4 hours at 1000Hz, 2000Hz and 8000Hz respectively. These data suggest that when measuring the pure tone audiometry for noise exposed workers, at least 16 hours noise-free interval is required.

한국형 출혈열 환자에서 분리한 한타 바이러스의 핵산 분석

조종태,윤성철,안규리,한진석,김성권,이정상 단국대학교 1998 論文集 Vol.33 No.-

Hemorrhagic fever with renal syndrome(HFRS)is an infectious disease showing diverse clinical manifestations according to different serotypes of hantavirus. On the assumption that the antigenicity, nucleotide and amino acid sequence diversity of hantaviruses, as well as immune response diversity of individual KHF patients may be present, this study was performed to analyse the genetic diversity of hantaviruses isolated from patients with KHF. In the 13 samples hantaviral RNAs were extracted, cDNAs of partial M segment were amplified by RT-PCR using genus-reactive primer, amplified cNNAs were analyzed by direct sequencing method, and then the nucleotide and deduced amino acid sequences were compared with previously known sequences of four serotypes of hantavirus isolated from rodent hosts and each other by the computer assistance. The results were as follows. The nucleotide and amino acid sequences of 11 samples among the 13 human isolates showed 90.3∼95.5%, 86.7∼97.9% the other 1 samples 82.7%, 71.9% homology respectively to those of Hantaan virus 76-118 strain, and another 1 sample showed 83.7%, 75.3% homology respectively to those of Seoul virus B1 strain isolated from rodent host. The nucleotide and amino acid sequences of 7 among 12 Hantaan samples showed differences within 5%, 10% respectively each other and high genetic similarities, but those of the oehr 5 among 12 Hantaan samples showed low genetic similarities each other. In conclusion, hantaviruese isolated from KHF patients showed genetic diversity compared with previously known hantaviruses isolated from rodent hosts.

디자인에 있어서 모듈러 시스템구축의 유효성에 관한 연구 : 중성펜 디자인개발 사례를 중심으로 concentrated on the Jelly Pen Design

조창연,이성남 한국디자인과학학회 1998 디자인과학연구 Vol.1 No.-

오늘날 디자인의 문제인식과 해결의 방법은 빠르게 전개되는 기술적 진보와. 문화적 분기에 따라 다양하게 시도되고 있다. 특히 컴퓨터를 응용한 디자인 작업은 제품정보의 통합적인 관리와 효과적인 처리를 할 수 있으므로 생산성 향상을 위한 방법으로 널리 사용되고 있다. 본 연구는 이러한 컴퓨터 응용기술을 A사의 중성펜 디자인 개발에 적용한 사례로서, "중성펜의 부품모들(Module)을 제품개념에 맞도록 최적화 시킨다'는 재발이념을 실천하며 추출한 8개 모델의 개발과정과 방법을 제시하였다. According to the development of technology and cultural divergence progressing rapidly, the critical recognition and the means of solution of Design are trying to realize diversely. Especially, since the Computer Aided Design work can manage the product information and process it effectively, it has been used for the method of higher productivity. This study is a example of the application of Computer Aided Design for the development of"Neutral-Pen" that is produced by "A" Co. producing stationery. This study shows the process and the method of the product development defined by "To be most suitable the parts module of the product according to the product concept" for eight models of Neutral-Pen.

작업장 누적소음 노출과 혈압과의 관련성

이상윤, 김재용*, 임형준, 윤기정, 최홍렬*, 고상백**, 강대희, 조수헌 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.2

목적 : 작업장에서의 누적소음노출값과 혈압의 변화 사이의 관계를 관찰하기 위한 단면 연구를 시행하였다. 방법 : 소음발생 제조업체의 남성근로자 중 건강진단 자료, 설문지 자료, 인사기록이 모두 갖추어진 852명을 연구대상으로 하였다. 작업장 소음측정값은 34개 지점에서 측정된 작업환경 측정 보고서 값을 사용하였고, 혈압은 건강진단시 측정한 수축기 혈압과 이완기 혈압 각각의 평균을 이용하였다. 가능한 교란변수들을 건강진단시 설문조사를 통하여 조사하였다. 근로자의 근무기간과 근무했던 작업부서의 소음노출값을 이용하여 누적소음노출값을 추정하였고, 이에 따라 전체 연구대상 근로자를 저소음노출군, 중등도소음노출군, 고소음노출군, 과다소음노출군으로 구분하였다. 누적소음노출값으로 구분한 소음노출군 사이에 평균 수축기 혈압 및 이완기 혈압의 차이가 있는 지를 나이, 비만도지수, 혈중 콜레스테롤값, 고혈압의 가족력, 흡연력, 음주력 등의 가능한 교란변수들의 영향을 통제한 상태에서 비교하였다. 결과 : 가능한 교란변수들을 보정한 상태에서 저소음노출군에서 과다소음노출군으로 갈수록 수축기 혈압 및 이완기 혈압의 증가가 있는지를 관찰하기 위해 일반선형모델을 이용하여 분석하였을 때, 수축기 혈압 및 이완기 혈압 모두 소음노출군이 혈압 변화의 유의한 설명변수였고, 수축기 혈압 및 이완기 혈압 모두 저소음노출군에 비해 과다소음노출군이 각각 2.1 mmHg, 2.7 mmHg 만큼 높았다. 결론 : 이는 만성적으로 누적된 고소음에의 노출로 인하여 혈압 상승의 가능성이 있음을 시사한다. Objectives : The association of workplace cumulative noise exposure and blood pressure was investigated in this study using cross-sectional design. Methods : The study population comprised 852 manufacturing male workers of whom occupational health examination data, questionnaire and personnel records were available. Workplace ambient noise monitoring data was used for calculating individual cumulative noise exposure level. Mean of each systolic and diastolic blood pressure of occupational health examination data was used for individual systolic and diastolic blood pressure level. Possible confounding variables including family history of hypertension, smoking habit, alcohol drinking habit were collected by questionnaire. On the basis of job location and duration of work at the location, a cumulatlve time-weighted average noise level was calculated for each workers. According to this cumulative noise exposure level, each study subject was categorized as low noise exposure group, moderate noise exposure group, high noise exposure group, very high noise exposure group. Among noise exposure groups, mean of systolic and diastolic blood pressure was compared after adjusting possible confounding variables such as age, body mass index, serum cholesterol level, family history of hypertension, smoking history, alcohol drinking habit. Results : After adjusting possible confounding variables, noise exposure group was signnificant explanatory variables for both systolic and diastolic blood pressure, and mean of both systolic and diastolic blood pressure of very high exposure group was higher than that of low exposure group. Conclusions : These findings suggested that the high cumulative noise exposure might elevate the blood pressure.

Carotenoids 식이와 알코올이 혈액학적 성분과 간조직에 미치는 영향에 관한 연구

조만희,김연선,이상한,우기민,장예진,김창세 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.2

Alcohol is well known agent which can damage the human tissues such as liver via stimulating lipid peroxidation and storage, denaturation of macromolecules, and inhibiting protein metabolism. On the other hand, carotenoids in addition to vitamins A, C, E and lipoic acid, play important roles in protecting these oxidative damages as well as preventing the production of free radicals. This study was carried out to elucidate the precise effects of alcohol administration into rats on the antioxidative functions of dietary carotenoids and isolated β-carotene, and to find out any parameters to uncover more detailed biochemical mechanisms of these agents. For these purposes, two different approaches were performed: 1) examination of the changes in hematological parameters (e.g., total proteins, A/G ratio, ALT/AST et. al) and statistical correlations among inter- and intragroups, 2) examination of the histopathological changes by an electron microscope. The results were analyzed and summarized as following; (1) Carrot diet for one week caused a slight increase in albumin. A/G ratio and AST levels, and a slight decrease in ALT, ALP, BUN and uric acid levels. Two-week alcohol administration following carrot diet increased total proteins, albumin A/G ratio and BUN levels. However, both groups were shown to have little significant changes in cholesterol concentrations. (2) Cheese diet for one week caused a significant increase in total proteins, albumin, AST, ALP, uric acid and total cholesterol levels, and a significant decrease in A/G ratio and glucose concentrations. However, two-week β-carotene diet following cheese intake increased total proteins albumin, A/G ratio, BUN and total cholesterol levels, whereas AST, ALT, ALP and uric acid levels were decreased. (3) Alcohol administration for one week caused an increase in AST activities and a decrease in total proteins, albumin, ALT, ALP and BUN levels. A successive β-carotene diet following alcohol administration increased total proteins, albumin, ALT, ALP and BUN levels, whereas decreased AST and uric acid levels. However, there were not significant changes in A/G ratio, glucose and total cholesterol levels in both groups. (4) β-carotene diet for one week caused a slight increase in albumin, glucose, AST and uric acid levels, and a slight decrease in ALP and BUN levels. Two-weeks alcohol administration following β-carotene diet increased albumin, glucose, BUN and total cholesterol levels, whereas decreased AST, ALT, ALP and uric acid levels. (5) Although the pathological investigation on the liver did not reveal significant changes, cheese diet group (CH-BC/1-CH) was shown to have some lipid deposits. Some results were unexpected and different from typical hematological changes shown by other researchers. Nonetheless, these results strongly suggest that the liver damage or hepatism caused by alcohol intake affects many kinds of biochemical metabolisms, which results in significant changes in many hematological parameters. In addition, dietary carotenoid and isolated β-carotene were shown to have protective roles against the biochemical changes by alcohol intake.

情神分裂病 患者의 腦梁과 視床 : 腦 磁氣共鳴映像 硏究 Magnetic Resonance Imaing Study

조성연,강민희,이정섭 대한생물치료정신의학회 2002 생물치료정신의학 Vol.8 No.2

남성 정신분열병 환자에서 대조군에 비하여 뇌량무릎(genu)부위가 유의하게 작았으며 여성 정신분열병 환자군에서는 양군에서 차이가 없었다. 시상의 면적에서는 양군의 차이가 없었다. 이러한 결과는 남성 정신분열병에서 전전두엽의 크기가 작을 가능성을 시사하며, 또한 남성 정신분열병이 여성에 비하여 신경발달학적인 이상이 많을 가능성을 생각할 수 있다. Magnetic resonance imaging study about size of corpus callosum and thalamus of the shizophrenic patient. Many previous studies have been performed. But the result have been inconsistent. We studied with developed semiautomated measurement method. Using DSM-Ⅳ diagnostic criteria of schizphrenia, we selected 20 subjects and 22 controls. We measured area of corpus callosum and thalamus in midsagittal image with NIH image software. Divided 7 areas of corpus callosum as Witelson method and area of thalamus were measured. Significant difference was found in genu area of male corpus callosum, but no significant difference was found in female between schizophrenia and control. Above finding suggests that male schizophrenia may have neurodevelopmental abnormalities and prefrontal abnormalities.

인공치아 이식 후 발생한 편측성 상악동염 1예

조성일,최지윤 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

Recently, dental implant is frequently performed in dentistry. It can give rise to complications such as maxillary sinusitis, oroantral fistula, displacement of implants and others. Among these complications, maxillary sinusitis is one of the severe complication, which is being reported to occur rarely. The complications of dental implant are often accompanied by gingival swelling, pain, fistula and other symptoms, for which immediate therapeutic measures may be implemented. The clinical diagnosis of sinusitis after dental implant is confirmed by radiologic findings and clinical symptoms. It can be treated with medical and surgical therapy. The authors experienced a case with unilateral maxillary sinusitis developed after dental implant performed at the dental clinic, which was alleviated by performing endoscopic sinus surgery. By reporting this case, we aimed to call attention to the complications of sinusitis and consider implant displacement in suspicious cases of acute maxillary sinusitis.

CBT를 이용한 안전한 멀티캐스트 그룹 관리

윤성현,장주만,조원환 高麗大學校附設 컴퓨터科學技術硏究所 1999 JOURNAL OF COMPUTER SCIENCE & ENGINEERING TECHNOLO Vol.2 No.-

보다 높은 대역폭에서 안전한 멀티캐스트 통신을 하고자 욕구는 기업, 정부, 그리고 인터넷을 사용하는 모든 단체에서의 고조되고 있고 또한 주요 관심사이다. 멀티캐스트 환경에서 보안성을 제공하기 위해 최근까지 진행되어 오고 있는 연구는 주로 그룹 키 관리 기법에 관한 것들이다. 본 논문에서는 화장성이 우수한 CBT 멀티캐스트 라우팅 프로토콜을 기반으로 안전한 인터넷 멀티캐스트를 위한 CBT기반 그룹 관리 시스템을 제안한다. 본 논문에서 제안하는 기법은 핵심라우터가 키 생성, 키 재구성, 그룹 가입, 탈퇴 등 그룹 관리 뿐 아니라 여러 가지 보안사항을 고려한 기능도 제공해 준다. The need for high bandwidth, very dynamic secure internet multicast communications is increasingly evident in a wide variety of commercial, government, and Internet communities. One of the most recently researches is mainly about the group key management schemes. In this paper, We'll propose a CBT-based group management system with scalable CBT multicast routing protocol. The benefits of this proposed technique are that it offers not only key generation, rekey, group join and leaving but also many functions lated security of multicast group.

한국 재래산양의 위장관에 분포하는 내분비세포의 면역조직화학적 연구

조성환,김무강,류시윤,허민도 대한해부학회 1992 Anatomy & Cell Biology Vol.25 No.1