안동주변수계의 저서성 대형무척추동물의 군집변동과 생물학적 수질평가

이종은,김명은,김은정 안동대학교 기초과학연구소 1996 基礎科學 硏究論文集 Vol.7 No.1

안동주변 수계의 수질평가를 위해 1995년 1월부터 1995년 7월까지 5지점을 선정하여 이화학적 및 생물학적 조사를 실시하였다. 수소이온농도, 용존산소, 질산성질소, 인산염, 화학적산소 요구량 등 이화학적 수질조사 결과는 조사지점별로 다소 차이는 있지만 모든 지점에서 II급수로 판정되었다. 또한 안동주변 수계에는 총 4문 5강 29과 50종의 저서성 대형무척추동물이 분포하는 것으로 나타났다. 생물학적 방법을 이용한 조사지점별 우점도지수 및 다양도지수를 산출하였으며, 군오탁지수에 의한 수질평가는 1,2,3지점은 II급수인 β-중부수성이였으며, 4,5지점은 III급수인 α-중부성으로 나타났다. 이화학적 방법과 생물학적 조사 결과의 차이점은 저서성 대형무척추동물의 서식에 영향을 주는 하상의 물리적구조와 이와 연관된 유기물의 퇴적층 등이 수서생물의 생존과 밀접한 관계가 있기 때문으로 사료된다. 일부 지점에서 이화학적 측정치와 일치되지 않는 곳도 있지만, 생물학적 조사에 의한 수질급수 판정이 장기간에 걸친 수계의 종합적 수환경을 대변할 수 있기 때문에 그 중요성이 고려되어야 할 것이다. We investigated the river system around Andong area for the evaluation of water quality. The research has been performed at 5 sites from January to July in 1995 based on the biological and physicochemical analysis. The results showed that the water quality of all sites was the Second degree of water quality in the physiochemical analyses such as pH, DO, NO3-N, PO3-P and COD, even though there are some variations depending on the site. The total number of benthic microinvertebrate taxa were composed of 50 species, 29 families, 5 classes, and 4 phyla. The indexes of the species dominance and diversity were calculated using a biological analysis. The evaluation of water quality by the Group Pollution Index showed that the water quality was β-mesosaprobic (the Second degree) at site 1, site 2, and site 3. The water quality of both site 4 and site 5was α-mesosaprobic (the Third degree). The different results between biological and physicochemical analysis might be due to the physical structure of the bottom side of river affecting the formation of organic deposit. Therefore, the physical structure of the bottom side of the river is closely related to the survival of the aquatic organisms. Although there are different results between physicochemical and biological analysis at some sites, we should consider the importance of the evaluation of water quality by the biological analysis because the results of this analysis could represent the comprehensive water environment of water system in long term.

99년도 안동지방 환경방사능 측정 및 분석

손연규 안동대학교 기초과학연구소 2000 基礎科學 硏究論文集 Vol.11 No.1

The objectives of the project are to monitor an abnormal level in Andong area and to provide a base-line data on enviromental radiation/radioactivity levels in case of any radiological emergency situation. The project is important in view of protecting the public health from the potential hazards of radiation and keeping up the clean environment. This report summarizes and interprets environmental radiation/radioactivity monitoring samples : Gamma exposure rates, airborne dust, precipitation, fall-out and drinking-water. Enviromental sample : grain products, pulses, vegetables, milk products, fishes/shellfish, eggs products meat products and seaweeds. Among the all 1999 radiological monitoring and environmental datas in Andong area were not found the extraordinary datas. And a nation-wide environmental radiation/radioactivity level survey results were all background levels attributed to terrestrial and cosmic radiation.

안동, 예천 지방의 삼림, 하천식생에 대한 식물사회학적 연구

송종석 안동대학교 기초과학연구소 1999 基礎科學 硏究論文集 Vol.10 No.1

안동, 예천지방에서 비교적 높은 자연성을 지니는 삼림식생과 하천변식생을 식물사회학적으로 조사하였다. 그 결과 삼림식생은 교목층의 우점종에 기본을 두어 14군락으로 구분되었다. 또 하천변식생은 18군락으로 구분되었다. 일부의 하천변식생의 식생단위는 기존의 식물사회학적 식생단위와 일치하였다. 현 식물사회학적 연구를 바탕으로 연구지역의 자연보전을 논하였다. The forest vegetation and the riverside vegetation having a high natural degree in Andong and Yechon areas were investigated phytosociologically. As a result the forest vegetation was classified into the thirteen communities on the basis of the dominant species in the tree layer(Tables 2 and 3). Also the riverside vegetation was classified into the eighteen communities. A part of the vegetation units of the riverside vegetation was coincided with the existing phytosociological units(Table 4), Based on the present phytosociological work, the nature conservation of the study area was discussed here.

The Dielectric Relaxation of Space Charge Polarization at Insulated Electrode/Conductive Dielectric/Partially Insulated Electrode Interface

윤석수 안동대학교 기초과학연구소 1991 基礎科學 硏究論文集 Vol.2 No.1

The theoretical analysis on the spectrum of complex dielectric permitivity at insulated electrode/conductive dielectric/partially insulated electrode interface shows two regions of Debye type dispersion due to space charge relaxation. The characteristic features of the proposed model are verified by the measurements of the complex dielectric permitivity for water, and adapted to monitoring of the hydration process of cement paste in the frequency range of 10^(4)-10^(6) Hz.

Production of Dense Plasma Foci in Hypocycloidal-Pinch as a Soft X-Ray Source

손연규 안동대학교 기초과학연구소 1991 基礎科學 硏究論文集 Vol.2 No.1

고출력 HCP장치는 단반형 전극으로 되어 있으며 고정밀 사진식각용 광원인 연 X-선을 발생시킬 수 있음이 연구되고 있는바, 고밀 plasma 초점은 압축되고 가숙된 plasma에서 생성되는 전류 sheaths와 sheets에 의해 형성된다. 초점이 형성될 때의 plasma밀도는 10(18)el/㎤이상이며 온도는 1KeV정도가 되는바, 이때에 밝고 해상력이 좋은 X-선이 발생된다. A new type of high-power hypocycloidal pinch (HCP) apparatus consisting of disk electrodes was investigated as a possible soft-x-ray source for a submicron lithography. Dense plasma foci are produced on the axis by collapse of the current sheets which compress and heat the plasma. The density and the temperature of the plasma reach Ne>10^(18)/㎤ and Te~lKeV when the energy of 20KJ is applied on the HCP device.

On Taylor Coefficient Multipliers of H1 into BMOA

권언근 안동대학교 기초과학연구소 1991 基礎科學 硏究論文集 Vol.2 No.1

The aim of this note is to correct a foolish error appeared at [K1].

Basic Properties Of CSL-ALGEBRAS

최택영 안동대학교 기초과학연구소 1990 基礎科學 硏究論文集 Vol.1 No.1

Let H be a complex Hilbert space and let Abe a subalgebra of B(H), the algebra of all bounded operators acting on H. An algebra Ais self-adjoint of A is in Afor every A in A. Otherwise, A is called a non-self-adjoint algebra. If L is a lattice of orthogonal projections acting on H, AlgL denotes the algebra of all bounded operators acting on H that leave invariant every orthogonal projection in L. A subspace lattice L is a strongly closed lattice of orthogonal projections acting on H, containing 0 and 1. Dually, if A is a subalgebra of B(H), then Lat A is the lattice of all orthogonal projections invariant for each operator in A. An algebra A is reflexve if A=AlgLatA and a lattice L is reflexive if L=LatAlgL. A lattice L is a commutative subspace lattice, or CSL, if each pair of projections in L communtes; Alg L is then called a CSL-algebra.

姙婦用 SLACKS의 原型設計法에 관한 硏究

김희숙 안동대학교 기초과학연구소 1990 基礎科學 硏究論文集 Vol.1 No.1

The purpose of this study was to develop a slacks pattern drafting method for pregnant women on the basis of their physical characteristics. The study procedures and results were as follows : 1. 112 pregnant women were measured on 40 items. 2. New slacks pattern drafting methods were developed based on the results of the data analysis. 3. The sensory test was applied to evaluate the new pattern for pregnant women by comparing it with one of the most used conventional patterns. An original rating scale was developed and used for the evaluation. According to a statistical analysis of the result of the 18 items on the questionnaire, 13 items showed significant difference (α<=0.01, α<=0.05) between two, with the new pattern having higher scores. The new drafting method proved to be better fitted, and to be comfortable.

한국산 애꽃벌 속의 분류학적 연구-1 : 털보 애꽃벌 아속 Subgenus Andrena (Hymenoptera : Apoidea)

김미량,서을원,이희무 안동대학교 기초과학연구소 1990 基礎科學 硏究論文集 Vol.1 No.1

Genus Andrena is belonging to the subfamily Andreninae of family Andrenidae. 32 species under the 15 subgenera were reported form Korea. But their taxonomic studies are very weak. Subgenus Andrena is the largest one in the genus Andrena. First, 6 species belonging to the subgenus Andrena were studied with remarks of classification, measurements, collecting sites and figures.

地盤改良工法 選定에 관한 小考

백승철 안동대학교 기초과학연구소 1991 基礎科學 硏究論文集 Vol.2 No.1

It is a complex problem to appropriately select soil improvement methods because the engineering judgement of soil improvement must be considered on the composite conditions of ground, especially in the soft ground. Hence, the optimum methods to improve the weak soils is essentially selected on the basis of the complete site investigation, the knowledge of their characteristics and the effects of the existing environments. Therefore, in the present study, the principles and characteristics of soil improvement methods proposed till now were analysed, and the guideline of the selection of the optimum soil improvement method was presented.