Elevational Distribution of Breeding Bird Communities in Seoraksan National Park, Korea

( Hyun-su Hwang ),( Jae-kang Lee ),( Tae-kyung Eom ),( Ho-kyoung Bae ),( Dong-ho Lee ),( Jong-hwan Lim ),( Sung-cheol Jung ),( Chan-ryul Park ),( Shin-jae Rhim ) 한국산림과학회(구 한국임학회) 2020 한국산림과학회지 Vol.109 No.1

In this study, the elevational distribution of breeding birds in Seoraksan National Park, Korea was investigated. Forty-six species of birds were documented from line transect surveys taken from Seorakdong at 230 m above sea level (a.s.l.) to the Daechungbong summit at 1708 m asl. Birdspecies richness and diversity were highest in Seorakdong and lowest at the Daechungbong summit. As elevation increased, bird species richness and diversity decreased, with a humped-shape trend being observed between 700 m and 1200 m a.s.l. Stepwise analyses revealed that breeding bird species diversity indices were significantly negatively correlated with elevation (r² = 0.327, P < 0.001) and positively correlated with vegetational coverage (r² = 0.324, P = 0.046). Higher elevations supported fewer birds than low and intermediate elevations. Projections at the local scale, including data on behavior and habitat use by birds, will be necessary for optimal conservation and management of the bird communities in Seoraksan National Park.

Elevational Distribution of Breeding Bird Communities in Seoraksan National Park, Korea

Hwang, Hyun-Su,Lee, Jae-Kang,Eom, Tae-Kyung,Bae, Ho-Kyoung,Lee, Dong-Ho,Lim, Jong-Hwan,Jung, Sung-Cheol,Park, Chan-Ryul,Rhim, Shin-Jae Korean Society of Forest Science 2020 한국산림과학회지 Vol.109 No.1

In this study, the elevational distribution of breeding birds in Seoraksan National Park, Korea was investigated. Forty-six species of birds were documented from line transect surveys taken from Seorakdong at 230 m above sea level (a.s.l.) to the Daechungbong summit at 1708 m asl. Birdspecies richness and diversity were highest in Seorakdong and lowest at the Daechungbong summit. As elevation increased, bird species richness and diversity decreased, with a humped-shape trend being observed between 700 m and 1200 m a.s.l. Stepwise analyses revealed that breeding bird species diversity indices were significantly negatively correlated with elevation (r² = 0.327, P < 0.001) and positively correlated with vegetational coverage (r² = 0.324, P = 0.046). Higher elevations supported fewer birds than low and intermediate elevations. Projections at the local scale, including data on behavior and habitat use by birds, will be necessary for optimal conservation and management of the bird communities in Seoraksan National Park.

한국장애인체육정책의 행정조직체계 개선에 관한 모델 연구

박준동,신동철 東亞大學校附設스포츠科學硏究所 2003 스포츠科學硏究論文集 Vol.21 No.-

Recently the Korean government has formally discussed what authorities are more effective in dealing with affairs in relation to sports for the disabled. Thus the purpose of this study is to propose models of the better management of such supports. For the purpose, this researcher reviewed current discussions between Ministries of Health & Welfare and Culture & Tourism about transferring the control of sports for the disabled and investigated foreign nations' administrative organizations and policies of such sports, which can be effectively useful to establishing such organizations and policies of this nation. As a result, the following models were proposed. 1. Proposal 1 : A model of development in the existing system under Ministry of Health & Welfare 2. Proposal 2 : A model of systematic development following the establishment of Korea Association of Sports for the Disabled(tentative) under Ministry of Health & Welfare 3. Proposal 3 : A model of step-by-step development through the transfer of the control of sports for the disabled from Ministry of Health & Welfare to Ministry of Culture & Tourism

한국 장애인체육 발전을 위한 증진 방안

박준동,신동철,김순금,김부환 東亞大學校附設스포츠科學硏究所 2003 스포츠科學硏究論文集 Vol.21 No.-

The purpose of this study is to find ways of promoting and developing sports for the disabled in Korea. For the purpose, this researcher made a literature research about the matter, and proposed the following ways of promoting such sports. 1. Change in competent authorities of sports for the disabled 2. The supplementation, enactment and revision of laws applicable to sports for the disabled 3. Improvement in the social recognition of disabled persons and sports for the disabled and increased participation in such sports 4. The expansion and increased use of facilities of sports for the disabled and the development of supplementary convenience facilities 5. Increase in administrative and financial supports to bodies of sports for the disabled 6. The training and increased allotment of instructors of sports for the disabled 7. The development and active distribution of special sport programs 8. The promotion of sport events for the disabled and the training of professional disabled players 9. Strengthening of systems of the information of sports for the disabled 10. Promotion of special school sports

스포츠·레저용품 구매행동에 관한 연구

박병주,노영태,이상봉,이영덕,전동호,박철준 釜山大學校 附設 體育科學硏究所 1997 體育科學硏究所 論文集 Vol.13 No.-

The decrease of working time and the increase of leisure time occused by the forms of Factory-Automation, Office-Automation and Household-Automation. The number of people involved in sports & leisure activities are world-widely increasing, and accordingly the demand of sports & leisure goods is outstandingly increased nowdays. In this regard, the main purpose of this study is to find out how the demand and desire of consumers are being formed by purchasing sports & leisure goods, to analysis major influencing consumers' purchasing activities by means of inspecting consumers' recogintion and attitude on sports & leisure goods. The following are results ; 1. In sports & leisure activity, this study is found out that 34 men(15.5%) play once in a week, 31(14.2%) play twice or thrice in a month, 29(13.3%) play twice or three in a week. But 31 women(14.2%) play twice or three in a month, 18(8.2%) play once in a week and 25(11.4%) never do it. 2. In use of purchasing goods, man in that to physical training 114(52.1%), to leisure 13(5.9%), etc 9(4.1%), women buy to leisure 75(34.3%), to physical training 5(2.3%), etc 3(1.3%). 3. The satisfied degrees of consumers is that man(3.82±0.7) is more than woman(2.86±0.7). 4. The determinant factors in purchasing is that woman is higher than, man in price, color, quality and design. But man is higher than woman in brand. 5. In improve method of sports and leisure goods, they answered in quality 113(51.6%), in design 66(30.2%), in price 16(7.3%), in brand 14(6.46%), in color 4(1.8%), etc 6(2.7%). 6. Information resources have mass media 52(23.7%), follow or friends 36(16.4%), show window or seller 21(9.6%). 7. The determinant factors of purchasing goods is 128(58.4%) in quality, 47(21.5%) in design, 37(16.9%) in color, 7(3.2%) in brand.

나일틸라피아 치어에 미치는 염화나트륨, 포르말린 및 과망간산칼륨의 급성독성

박인석,최경철,노재구,김동수 韓國海洋大學校 附設 海洋科學技術硏究所 2002 硏究論文集 Vol.11 No.1

염화나트륨(Nacl), 포르말린 및 과망간산칼륨(KMnO_4)에 대한 나일틸라피아, Oreochromis niloticus의 24시간 급성 독성을 조사하였다. 1. NaCl의 24시간 LC_50값은 18.6‰이었고 95% 신뢰한계의 상한치는 18.7‰, 하한치는 18.5‰이었다. 포르말린의 24시간 LC_50값은 152ppm이었고, 상한치는 156ppm, 하한치는 148ppm이었다. KMnO_4의 24시간 LC_50값은 2.09ppm이었고 상한치는 2.11ppm, 하한치는 2.07ppm이었다. 2. 모든 처리 화합물은 본 종에 대해 좁은 농도 범위 내에서 급성 독성 효과를 나타내었으며, 아울러 뚜렷한 농도 의존성을 보였다. 이상의 결과를 본 연구에서 사용된 3가지 화합물의 틸라피아 양식에서의 유용성과 연관시켜 논의하였다. A study on the acute toxicity in the Nile tilapia, Oreochromis niloticus fry showed that the 24hr-LC_50 was 18.6‰ for NaCl, 152 ppm for formaline and 2.1 ppm for KMnO_4. The fry responded to narrow range of concentration of all the tested chemicals and their toxic effects were dose-dependent.

패킷 폐기에 따른 ATM망 성능평가

박승섭,육동철 釜慶大學校 2000 釜慶大學校 論文集 Vol.5 No.-

ATM network mechanism is generally used for the solution of integrating multimedia service in high-speed Internet. In Internet protocol based on ATM services, the loss of single cell in ATM layer means that TCP packet is lost, as a result, TCP performance will be degraded. In this paper, to improve the TCP performance, we propose the new packet dropping scheme. To verify the efficiency of our proposed scheme, we compare our proposed scheme with other packet dropping scheme, i.e., EPD(Early Packet Discard), SPD (Selective Packet Dropping), and FBA(Fair Buffer Allocation). Through the simulation results, we know that our scheme can allocate more fairly each virtual channel(VC) than other schemes even if number of VC is increased, and no difference is shown in throughput.

Ⅱ급 부정교합자에서 Ⅱ급 고무사용에 의한 교정치료후 교합평면의 변화와 안정성에 관한 연구

박동철,홍성준 全北大學校 齒醫學硏究所 1991 전북치대논문집 Vol.9 No.1

The purpose of this study was to investigate the change and stability of the cant of occlusal plane affected by the use of Class Ⅱ elastic in Class Ⅱ individuals. Materials consisted of lateral roentgenocephalograms of 29 patients treated with full brackets system Cephalograms was taken at following 3 stages ; the begining of orthodontic treatment, the begining of retention, 2 years after orthodontic treatment. Measurements were done at following angles and distance. l. SN-Occlusal plane 2. Palatal plane-Occlusal plane 3. Mandibular plane-Occlusal plane 4. AB plane-Occlusal plane 5. Occlusal plane inclination 6. Xi-Occlusal plane distance The results were as follows ; 1. The changes of the occlusal plane mainly occured within the alveolar process. 2. The SN-Occlusal plane angle showed a great stability in 2 years after orthodontic treatment. 3. In this study it has likewise been shown that the changes in the inclination of the occlusal plane accompanied by treatment, have a little tendency to return to the original condition in those case exhibiting or no growth. 4. Since I have observed many cases 2 years after treatment in which the tipped occlusal plane has remained tipped. The relapse occured slightly, however, was not statistically significant.

백서의 실험적 치아이동시 Nitric Oxide Synthetase 발현에 관한 연구

박동권,김은철,김상철 원광대학교 생체재료·매식연구소 1997 원광생체재료·매식 Vol.6 No.1

Nitric oxide(NO) has been reported to be one of the mediators relating to bone remodeling. Nitric oxide is synthesized from L-arguinine by nitric oxide synthetase(NOS), which is largely divided into two groups. One group which is composed of NOS_1 and NOS_3, is dependent of calcium or calmodulin. The other consisted of NOS_2, which is independent of calcium or calmodulin. NOS is thought to be a possible intermediate affecting in the course of tooth movement. This study was designed to evaluate the expression of nitrous oxide synthetase(NOS) in periodontal tissue during the experimental movement of rat incisors, by LSAB(labelled streptavidine biotin) immunohistochemical staining for NOS_2 and NOS_3. Twenty seven Sprague-Dawley rats were divided into a control group(3 rats), and 6 experimental groups(24 rats), to which 75g of force was applied, with helical springs across the maxillary incisors. Rats of experimental groups were sacrificed at 12 hours, 1, 4, 7, 14 and 28 days after force application, respectively. After that, the tissues of the control group and experimental groups were studied immunohistochemically. The results were as follows : 1. In control group, the expression of NOS_3 was rare in gingiva, dentin, periodontal ligament and alveolar bone, and was mild in the capillaries of pulp and intermaxillary suture. And the expression of NOS_2 showed similar pattern to that of NOS_3. 2. There were no differences in the expression of NOS_2 or NOS_3 in dentin, gingiva, cementum, cementoblast and odontoblast, between control and experimental groups, regardless of the duration of the force application. 3. The expression of NOS_3 began to increase at 4 days and showed to the highest degree at 7 days after force application, in the apical region of pressure side of periodontal ligament in experimental groups. 4. The expression of NOS_3 in alveolar bone was rare until 7 days, after which it increased to mild degree at 14 days through 28 days in experimental group. But there was no difference between pressure and tension side of periodontal ligament. 5. The expression of NOS_2 in periodontal ligament was mild from 7 days after force application, regardless of the side of periodontium, which was generally more evident than that of NOS_3. 6. The expression of NOS_2 in alveolar bone increased to mild degree at 14 days after force application, and it was evident in osteoclasts and osteocytes. And the expression of NOS_2 was little more stronger in the tension side than that of pressure side of alveolar bone.

고속주축 모니터링용 광파이버 변위센서의 파이버 특성에 따른 센서 성능 연구

박찬규,신우철,배완성,홍준희,이동주 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

To make high speed spindle system work properly, sensors with outstanding resolution and dynamic characteristics are essential. An optical fiber displacement sensor is based on simple principles. Electrical signal responds to the optical flux change due to the displacement change between a target and a sensor probe. In this paper, the performance of optical fiber displacement sensor has been investigated according to properties of optical fiber. Firstly, optical loss has been measured before and after polishing optical fiber endface. Secondly, allowance of optical fiber bending has been tested. thirdly sensitivity and linear range of the sensor has been found out according to the shape of cross section of optical fiber.