동강의 어류상과 생태학적 군집분석

최준길 ( Jun Kil Choi ),오사무미타무라 ( Osamu Mitamura ),이동준 ( Dong Jun Lee ),신현선 ( Hyun Seon Shin ) 한국환경생태학회 2008 한국환경생태학회지 Vol.22 No.6

2006년 5월부터 2007년 5월까지 동강의 어류상과 생태학적 군집분석을 조사한 결과는 다음과 같다. 조사된 어종은 총 10과 31종이었다. 총 31종의 어종 중 일차담수어가 26종, 주연성 담수어가 5종으로 나타나 일차담수어의 구성비가 매우 높았다. 우점종은 참갈겨니(Zacco koreanus) 55.73%, 아우점종은 쉬리(Coreoleuciscus splendidus) 7.15%였으며, 우세종은 배가시리(Microphysogobio longidorsalis) 6.12%, 어름치(Hemibarbus mylodon) 4.87%, 참종개(Iksookimia koreensis) 4.49% 등이었다. 한국고유종은 묵납자루(Acheilognathus signifer), 줄납자루(A. yamatsutae), 가는돌고기(Pseudopungtungia tenuicorpus), 쉬리(C. splendidus), 긴몰개(Squalidus gracilis majimae) 그리고 어름치(H. mylodon) 등 19종(61.29%)으로 고유종의 빈도가 매우 높았으며, 천연기념물이 1종, 환경부지정 멸종위기 야생동물 II급 종이 5종으로 각각 확인되었다. 예상되는 종수(기대종)의 분석 결과, 동강의 전 조사지점에서는 18(지점 4, 5)∼22종(지점 3)이 서식하고 있을 것으로 나타났으며, 유사도 분석은 62.28%(지점 1과 2)∼84.13%(지점 1과 5)의 범위로 나타났다. 따라서 동강유역은 어류가 서식하기에 매우 적합한 수환경을 유지하고 있으며, 각 조사지점별 수환경도 매우 유사한 것으로 판단된다. The ichthyofauna and ecological community analysis in the Dong River, Korea, were investigated from May, 2006 to May, 2007. During the surveyed period, 31 species belonging 9 families were collected. Total of 31 species(primary freshwater: 26 species, peripheral freshwater: 5 species) were found with the primary freshwater fishes being highest. Dominant species was Zacco koreanus(55.73%), and subdominant species was Coreoleuciscus splendidus(7.15%). Also, Microphysogobio longidorsalis (6.12%), Hemibarbus mylodon(4.87%), Iksookimia koreensis(4.49%) were numerous. There were 19 Korean endemic species(61.29%), including Acheilognathus signifer, A. yamatsutae, Pseudopungtungia tenuicorpus, C. splendidus, Squalidus gracilis majimae, H. mylodon. Among them, 1 species was identified as qualifying for possible desigantion as a natural monument catergory, and 5 species were identified for designation required to protect under a wildlife category. As result of expected number of species according to rarefaction curve, the expected species of the Dong-river ranged from 19(St. 4, 5) to 22(St. 3) and result of similarity analysis ranged from 62.28%(St. 1 and 2) to 84.13%(St. 1 and 5). In conclusions, we could define that the Dong-river has a very good water conditions as habitat of fish, and habitat conditions also are very similar in every survey sites.

韓國河川의 流出率과 流出指標로서의 洪水直前 流量

金熙鍾,柳又秀,金佳鉉,申東守,韓健模,全裕燦 東亞大學校 大學院 1984 大學院論文集 Vol.9 No.-

This paper is a study on relation between run-off ratio and antecedent discharge, run-off ratio and antecedent discharge per unit area, antecedent discharge and antecedent precipitation, by the data from the five major river basins in Korea and the small river basins in Pusan. The Nak-Dong rivers(An-Dong upper stream) f=0.4780+0.0124 ln qA r=0.99 qA=0.3368e0.1101R r=0.99 f=0.5793+0.0146 ln(qA/A) r=0.99 The Nak-Dong rivers except Ga-song station f=0.2017-0.0840 ln qA r=0.75 f=0.7012+0.0750 ln(aA/A) r=0.71 The Han rivers f=-0.0035+01267 on qA r=0.75 f=1.1311+0.1263 ln(qA/A) r=0.71 L=302.9064-43.8490 ln qA r=0.84 The Geun rivers(Mu-sin Cheon) f=0.295+0.1823 ln qA r=0.93 f=0.8417+0.1823 ln(qA/A) r=0.93 L=40.0456+62.0346 ln qA r=0.94 The Yeong-san rivers f=0.3766+0.0598 ln qA r=0.79 f=0.8084+0.0599 ln(qA/A) r=0.79 The Seom-jin rivers f=-1.3875+0.6505 ln qA r=0.92 f=2.1633+0.3465 ln(qA/A) r=0.76 Small river basin in Pusan f=0.3635+0.1120 ln qA r=0.87

인축적 미생물의 인방출과 세포내 저장물질 합성관계

신응배,김미경,홍준혁,공동수 한국물환경학회 2004 한국물환경학회지 Vol.20 No.6

Biological phosphorus removal is characterized by complex interactions between different intracellular components of energy as PHA. Therefore, fundamental understanding of the behavior of the intracellular components and their influence on the removal of phosphorus is essential before control strategies to stabilize the proper process. The purpose of this study is to investigate relationship between release of phosphorus and synthesis of intracellular storage polymer. Mass of stored intracellular storage polymer was 21.2 ㎎ PHA/L, 28.8 ㎎ PHA / g MLSS. And phosphorus release/ intracellular storage polymer synthesis rate was 1.8545 ㎎ stored polymer/㎎ Phosphate. In the aerobic phase, mass of PAOs synthesis is 49.37 ㎎ PAOs/L. And PAOs fraction was 6.7-6.9%. Thus intracellular storage polymer synthesis by PAOs is calculated as 493㎎ PHA / g PAOs.

자동차 배기시스템의 배압특성에 관한 실험적연구

신동륜,이준서,차경옥 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

Based on Experimental analysis, the characteristics of back pressure in automotive exhaust system is tested for 4-stroke gasoline engine. The back pressure in automotive exhaust system is generated by resistance working of exhaust system, i.e. exhaust manifold, pipe length, pipe banding, difference system pressure with atmospheric pressure. This paper contains experimental results which are tested for the change of exhaust pipe length and torque change are tested under experimental conditions.

자율신경계의 활성도 측정을 위한 Data Acquisition System의 개발 및 임상응용

신동구,박종선,김영조,심봉섭,이상학,이준하 영남대학교 기초/임상의학연구소 2001 Yeungnam University Journal of Medicine Vol.18 No.1

Background: Power spectrum analysis method is a powerful noninvasive tool for quantifying autonomic nervous system activity. In this paper, we developed a data acquistion system for estimating the activity of the autonomic nervous system by the analysis of heart rate and respiratory rate variability using power spectrum analysis. Materials and methods: For the detection of QRS peak and measurement of respiratory rate from patient's ECG, we used low-pass filter and impedance method respectively. This system adopt an isolated power for patient's safety. In this system, two output signals can be obtained: R-R interval(heart rate) and respiration rate time series. Experimental ranges are 30∼240 BPM for ECG and 15∼80 BPM for respiration. Regults: The system can acquire two signals accurately both in the experimental test using simulator and in real clinical setting. Conclusion: The system developed in this paper is efficient for the acquisition of heart rate and respiration signals. This system will play a role in research area for improving our understanding of the pathophysiologic involvement of the autonomic nervous system in various disease states.

입자 크기에 따른 ITO 가스 센서의 가스 감지 특성

신동원,김봉철,전희권,이상태,이덕동,허증수 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

유도형 변위 센서의 전기 노이즈 분석과 센서 성능에 미치는 영향 고찰

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

Noise is a problem in many electronic circuits and active control system. Arising from spuriously coupled noise from other circuits, it corrupts the signal of interest and introduces an uncertainty into information it contains. In this paper, we have researched noise characteristics of the inductive displacement sensor which has been designed. we first present basic concept and characteristics of magnetic field-coupled noise in the sensor output signal. Then, we are present relation noise and sensor performances. Finally, we concentrate low noise design of a sensor driver and a signal detection circuit.

복합 운동프로그램이 초등학생의 신체구성, 혈중지질 및 체력에 미치는 영향

전종귀,이왕록,박희근,정준현,이영란,신동원,이경숙 충남대학교 체육과학연구소 2006 體育科學硏究誌 Vol.23 No.1

The purpose of the present study was to examine the effects of combined training on the changes of body composition, blood lipid profile and fitness in elementary school students. Thirty subjects participated in the present study. The subjects were divided into two groups either exercise group for 10weeks(15n) or control group for 10weeks(l5n) The results were described as follows; 1) There were significant differences in the body weight and lean body mass after the exercise program between two groups. 2) There were no significant differences in the blood TC, HDL-C, LDL-C, TG concentration after the exercise program between two groups. 3) There were significant differences in the sit-up and flexibility after the exercise group between two groups. In conclusion, it might be thought that the combined training improved the levels of body composition and health-related fitness in elementary subjects.

고출력 레이저에 의한 이종금속 용접특성

신호준,유영태,임기건,안동규 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

For many years and primarily for economical reasons, Dissimilar Metal Welds have been used as transition joints in a variety of equipment and applications. But Dissimilar Metal Welds have several fabrication and metallurgical drawbacks that can often lead to in-service failures. In this paper, the laser weldability of STS304 stainless steel and SM45C at dissimilar metal welds using a continuous wave Nd:YAG laser are experimentally investigated. An experimental study was conducted to determine effects of welding parameters, on eliminating or reducing the extent welding zone formation at dissimilar metal welds and to optimize those parameters that have the most influence parameters such as focus length, power, beam speed, shielding gas, and wave length of laser were tested.

높은 받음각에서 양항 특성의 향상을 위한 공력 보조 PANEL에 관한 연구

신동진,이봉준 한국항공운항학회 1994 한국항공운항학회지 Vol.2 No.-

항공기에 사용되는 2차 조종면은 플랩, 탭, 스포일러 등 여러 종류가 있으며 이중 spoiler는 공력제어 기능을 가지고 항공기의 조정성에 영향을 미치는 조종면으로 속도 감속이나 옆놀이 조종용으로 사용된다. 본 연구에서는 비행제어용 spoiler 기능과 고양항력을 얻을 수 있는 새로운 장치인 고양항력 panel에 대한 공력특성 및 비행제어 특성에 대하여 연구하였다. 이러한 고양항력 panel은 재래식인 spoiler가 양력을 감소시키고 항력만 증가시키는 장치인데 반하여 양력과 항력을 동시에 증가 시킬 수 있는 새로운 장치로서 날개의 앞전 뒷면에 스팬방향으로 설치하여 슬롯효과를 발생시킴으로써 최대 양력 받음각에서 앞전에서의 박리를 막아 비행기의 착륙시 양력의 급작스러운 감소로 인한 불안정성을 감소시키게 된다. 본 논문에서는 직사각형 날개 및 FA-200모형의 날개위에 고양항력 panel을 설치하여 풍동실험 및 수치계산을 한 결과를 기술하였다. 실험결과 직사각형 날개의 경우 고양항력 panel의 위치는 날개의 앞전에 설치할 경우 고받음각에서 실속지연의 효과와 함께 후방실속의 특성을 향상 시킬 수 있으며, 항력의 증가로 인한 스포일러 효과를 얻을 수 있다. 양항비특성은 고양항력 panel을 날개의 앞전에 설치하고, 그 폭이 시위의 1/5이고, 붙임각 θ가 10°, 높이가 시위의 3/20일 때 받음각 18° 이후에서 우수한 특성을 나타내었다. FA-200 모형의 경우 옆놀이 모멘트계수는 받음각이 작을 때 고양항력 panel의 슬롯간격과 붙임각이 작을수록 커지나 받음각이 커지면 붙임각이 커짐에 따라 증가함을 알 수 있다. 또한 키놀이 모멘트계수는 크게 변화하지 않으나 항력 특성은 고양항력 panel의 붙임각이 증가함에 따라 증가하였다. 고양항력 panel의 붙임각이 큰 범위에서(θ=10°) 공기력의 증가는 고양항력 panel의 시위가 날개시위의 30%이고 슬롯의 폭이 날개시위의 10%일 때 증가하는 결과를 얻을 수 있다.