This research was performed to simulate shellfish production systems and sales in Gamak Bay, South Korea. To study the way the shellfish system generates maxima, a numerical model was developed to simulate the model under a control and a number of different scenarios. The program calculates the EMERGY flows by multiplying the flows of energy and materials by the appropriate solar transformity. In this study, an energy systems model was built to simulate the variation of sustainability for oyster aquaculture. The results of the simulation based on 2005 data that as oyster production yield slightly increases, money and assets increase to a steady state. When the program is run control simulation, the system reaches carrying capacity after 8 years. The simulation of models with price of purchased inputs increased with 3.5% inflation rate per year showed maximum benefit of shellfish production occurs after 6 years but amounts are less than control simulation, and then decreases slightly in money and yield results. The results with 3.5% inflation and increase of oyster price annually showed steady and slightly increase of money and yield.

The objective of this research is to apply more scientific, quantitative methods and procedures of environmental investigation to the development of the natural environment and the improvement of the human environment during the establishment of a sewage treatment plant and special facilities using environmental accounting. This research was performed to develop a method of strategic environmental assessment on the operation of sewage treatment plant and reuse of shellfish seeding areas through the use of environmental accounting based on EMERGY evaluation. The result was applied to marine environment policy in order to evaluate the real wealth of the regional environment and economy for both the present phase and the proposed developed phase. Using results from the comparison of EMERGY indices between the present situation and future scenarios, cost benefit analysis was performed for three different scenarios: (1) construction of a new sewage treatment plant, (2) relocation and recovery of the shellfish seeding area , and (3) relocation and re-seeding of shellfish area and construction of a new sewage treatment plant. Cost-benefit ratios of the three scenarios are 1.88, 0.94, and 1.38, respectively.

This research outlines a new method for evaluation of shellfish production in Gamak Bay based on the concept of EMERGY. Better understanding of those environmental factors influencing oyster production and the management of oyster stocks requires the ability to assess the real value of environmental sources such as solar energy, river, tide, wave, wind, and other physical mechanisms. In this research, EMERGY flows from environment sources were 76% for shellfish aquaculture in Gamak Bay. EMERGY yield ratio, Environmental Loading Ratio, and Sustainability Index were 4.26, 0.31 and 13.89, respectively. Using the Emergy evaluation data, the predicted maximum shellfish aquaculture production in Gamak Bay and the FDA (Food and Drug Administration, U.S.) designated area in Gamak Bay were 10,845 ton/y and 7,548 ton/yr, respectively. Since the predicted shellfish production was approximately 1.3 times more than produced shellfish production in 2005, the carrying capacity of Gamak Bay is estimated to be 1.3 times more than the present oyster production.

Statistical analysis technique was applied to operating parameters and removal efficiency data sets obtained from advanced wastewater treatment plant during 1 year. Through factor analysis three factors derived varimax rotation were selected each plant. Three components explained 96%, 87% of the total variance of the process, respectively. The components on A2O plant were identified in the following order：1) Shortening the SRT during high-flow period, 2) Keeping biomass high on winter 3) factor was related to DO. On DNR plant, we defined them as follows: factor 1, Prolonged the SRT during high-flow period; factor 2 was related to sludge return; factor 3, Influent BOD during low-DO period. This technique was believed to assist operators in identifying priorities to improve operation efficiency.

In Korea, a regulation of visual impact evaluation on development plan in natural environment is provided at the Natural Environment Conservation Act, but it was difficult to obtained the effectiveness enough to conserve natural landscape. So, the visual impact review on development plan is introduced to the act, through the revision of the Natural Environment Conservation Act in 2005. The basic directions of visual impact review are preservation, restoration, view protection, and harmony. The items of review are as follows; (1) development alternations for the provided plan, (2) executive reduction plan of visual impacts including consideration of growth of plants, (3) deliberation process between persons or parties concerned, etc. For rapid settlement of visual impact review system, it needs that the validity, the reliability, and the objectivity should be confirmed through steady research about reasonable guidance of review.

본 논문에서는 Jahanshahloo et al (2007)가 새롭게 제시한 모형을 이용하여 2004년도, 국내 26개 항만들을 대상으로 2개의 투입변수(접안능력, 하역능력)와 3개의 산출변수(수출화물처리량, 수입화물처리량, 입출항척수) 가 있는 경우의 CCR[Charnes, Cooper, Rhodes(l978)] 효율성을 측정하였다. 또한 효율성이 1인 효율적인 항만들을 제거하는 방법과 나머지 항만들의 효율성을 평균하는 방법을 이용하여 효율적인 항만들의 정확한 순위를 측정하였다. 실증분석의 핵심적인 결과를 살펴보면, 가장 효율적인 항만의 순위는 옥포, 삼척, 울산, 대산, 부산, 고현항의 순위로 나타났다. 10개의 컨테이너항만을 제외한 16개 일반 항만들 중에서는 삼척항이 가장 강력한 효율적인 항만으로 나타났다. 정책적인 함의는 항만정책당국이 본 논문에서 사용한 분석방법과 더 장기적인 기간을 대상으로 효율성 분석을 시행하고 효율적으로 판명된 항만들에 대해서는 정확한 순위를 파악하고 그러한 결과를 차후 항만투자와 개발 시에 반드시 고려하고 반영해야만 한다는 점이다.

Allotment gardens with log house in rural area as a rural growth tool are able to adapt to current market mechanisms by communication and promotion techniques. It is important to know what and how allotment garden's users seek their benefits to market segmentations. The primary purpose of this study was to segment and profile the benefits of allotment garden's potential users so as to provide a better understanding of allotment garden in Korea. A self-administered survey was obtained from 298 allotment gardens users in the study area. Four distinct segments were identified based on the benefits; relaxer(23.7%), educator(21.9%), want-it-all gardener(42.3%), and grower(12.2%), and these were profiled with respect to socio-demographics and civic garden-related features. We suggest that the relaxers are target market of allotment gardens with log house because they have willingly intented to pay a higher rent.

전자교과서는 1990년대 현 사회의 패러다임 변화에 따른 교육의 새로운 대안으로 제시된 이래, 최근의 컴퓨터 기술의 발전으로 도입에 당면해 있다. 그러나 이에 대한 실질적인 기초 연구는 부족한 실정이다. 이에 본 연구는 전자교과서의 성격을 학습자의 자기주도적 학습을 지원하는 형태로 규정하고, 학습자의 자발적인 참여를 위한 전자교과서의 설계 방안을 논의하고자 하였다. 이를 위하여 전자교과서의 개념을 간단히 정리하여 보고, 전자 교과서의 특성, 유형을 살펴보고, 현황 및 문제점을 간단히 짚어보았다. 그리고 학습 동기(ARCS) 이론과 최근 주목받고 있는 몰입(flow) 이론의 개념과 구성 요인 등을 검토하였고, 이를 토대로 앞으로 개발될 전자 교과서에서 고려해야 할 점을 기술적 측면과 내용 구성 체제 측면에서 각각 전망해 보았다. 컴퓨터 관련 기술의 발달과 함께 전자교과서의 모습은 계속해서 변화와 발전을 해 나갈 것이다. 이러한 전자교과서 개발에 있어 본 연구는 기초 연구의 성격을 띤다고 할 수 있다.

본 연구는 스포츠 동호회 세 집단(인라인스케이트, 철인 3종 경기, 스포츠 클라이밍)을 선정하여 동호인들의 운동중독 과정과 증상에 대한 체험을 기술하고 근거이론(grounded theory)을 개발하는데 목적이 있다. 운동중독 상태에 있는 동호인 9명을 대상으로 포커스집단 면접(focus group interview)과 개인별 심층면접을 실시하여 운동중독에 이르는 과정과 운동중독 증상 체험에 관한 자료를 수집하였다. 질적 자료 분석의 일반적인 절차에 따라 자료를 분석하였다. 그 결과 운동지속과 운동중독에 영향을 주는 요인, 운동중독의 증상 체험, 운동중독에 따른 장단점 인식, 운동중독 극복전략과 결과에 대해 다양한 측면에서 논리적이고 연계성 있는 설명이 가능한 근거이론 모형을 개발하였다. 본 연구의 결과는 우리나라 스포츠 동호인들에게 운동중독을 이해하기 위한 기초 자료를 제공하고 운동중독의 예방과 대처를 위한 다양한 연구 활동을 촉진하는 역할을 할 것으로 기대된다.

본 연구에서는 유역규모의 응답과정에 대한 지표면유동과 하천유동의 상대적 기여도를 평가해 보고자 한다. 이를 위하여 GIUH 모형의 적률을 금강수계 보청천유역의 자료에 적용하였다. 본 연구에서 유도된 GIUH 모형은 하천 및 지표면에 대한 개별적인 배수경로들로 구성된다. 사전에 예상된 바와 같이, 양자의 특성속도는 현저하게 구별될 수 있었다. 이를 Rodriguez-Iturbe and Valdes(1979)의 모형에 의한 특성속도와 비교해본 결과 본 연구