• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.584-590
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• 1993

The constructed closed recycling system discussed in this technical report will be economically viable in future for the production of fish and vegetable in earth, space station and space colony, further, it will contribute a lot in the prevention of pollution in the world's ecological system. To make combined system, water management (Nitrification) is required, and it took 45 days to breed microorganism which facilitates this process. After this period , the recycle was confirmed to be working .Using derived equations, the expected nutrient characteristics of waste water were determined and it was found that the resulting nutrient balance was almost same as that in hydroponic solution when KOH was added to maintain pH level. Reverse osmosis (RO) system could solve the problem of the low nutrient concentration . It was found that plants grow well in fish waste water which was produced using RO system. RO system could combine fish and plant production through the advantageous use of separated high concentration water for plant and permeated water for fish in integrated combined system.

• 한국유기농업학회지
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• 제22권4호
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• pp.561-579
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• 2014

This research estimates the necessity of a better governance plan on the purpose of fulfillment energy recovery by building resource recycling system for biomass resources and waste resources that derive from agricultural and mountain village areas. The utilization of new renewable energy technology which uses waste and biomass sources diverse as variety of resources, collecting method, operator etc. and is structurally complicated the formation of policy is also very difficult. There is failure because of the problems which occurs from the policy led by government. Biomass Town Development Project should be made through the central government and the local government integrated support system and should be formed a consultative group in order to process the project mutually with these two department including the experts from the related areas. This consultative group, while government organizations carry out the hub function of strategic knowledge management, should carry out the control tower function to be able to be net working transfer the information with the cooperation of private and government so vitalize the communication area among the related actors. And to be able to increase the participation rate of the local people the consistent and various educations should be given so a smooth business promotion progress will be desired through the change of perception and coactive participation of people.

• 한국가구학회지
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• 제20권6호
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• pp.581-589
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• 2009

Under 'The Design Street' Project, one of the urban environment improvement projects of Seoul, the facilities on the street have been greatly varied in terms of design. In addition, the municipal authority has pushed each district to develop its own identity based on the integrated design of the city. This study was aimed to propose a design which could solve the current problem in street furniture in terms of environmental improvement through an analysis on current street conditions in "Y" District as a part of Seoul Design Street Project. It has attempted to propose 11 street furnitures based on the basic strategy of 'Soft City' which has been promoted by Seoul City in accordance with the Seoul Public Facility Guidelines as 1. Airy Design, 2. Integrated Design, 3. Collaborative Design and 4. Sustainable Design. Among them, for the total design in Seoul six facilities - kiosk, manhole, traffic signal controller, public phone, road sign and waste receptacle were proposed by Seoul City have been accepted. For local differentiation, on the contrary, five items - planter bench, bollard, lifter, bike rack and fence have been newly designed and proposed. Furthermore, it is essential to carry out systematic supervision and continuous management on the detail design and construction of current regional design development projects.

• 한국유기농업학회지
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• 제21권1호
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• pp.1-18
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• 2013

Animal and crop production systems were integrated on a single farm. This integrated farming system recycled nutrients on the farm. The separation of animal and crop production with the introduction of cheap commercial fertilizers, farms were not used land-applied manure. The on-line manure matching is one of the emerging business in the achievement of recycling and resource recovery. The manure matching actively promotes the reuse and recycling of by-products and manure. This study constructs to manure matching information system to solve the exchange problems between herders and croppers. Manure matching web sites designed. This paper introduces a web-based animal manure matching system. A manure matching service, part of the manure transport, links farmers who produce excess manure with farmers who can use the manure. Farmers registered with the service have requested manure. The manure matching service supports the transport project by linking farmers with excess manure with those farmers who can utilize the manure safely as a nutrient source. The goal of the service is to protect water quality by fostering efficient land application. Benefits to those who use the manure network include reduced disposal costs, lower purchase costs and recycling of manure. The manure matching is based on the principle that 'one persons waste is another person's fertilizer.' It provides a free online matchmaking service for environmentally safe manure recycling management system.

• Management Science and Financial Engineering
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• 제18권1호
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• pp.1-12
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• 2012

In this paper, we report a case study on the common due-date assignment and scheduling problem in a paper remanufacturing system that produces corrugated cardboards using collected waste papers for a given set of orders under the make-to-order (MTO) environment. Since the system produces corrugated cardboards in an integrated process and has sequence-dependent setups, the problem considered here can be regarded as common due-date assignment and sequencing on a single machine with sequence-dependent setup times. The objective is to minimize the sum of the penalties associated with due-date assignment, earliness, and tardiness. In the study, the earliness and tardiness penalties were obtained from inventory holding and backorder costs, respectively. To solve the problem, we adopted two types of algorithms: (a) branch and bound algorithm that gives the optimal solutions; and (b) heuristic algorithms. Computational experiments were done on the data generated from the case and the results show that both types of algorithms work well for the case data. In particular, the branch and bound algorithm gave the optimal solutions quickly. However, it is recommended to use the heuristic algorithms for large-sized instances, especially when the solution time is very critical.

• International Journal of Computer Science & Network Security
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• 제22권1호
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• pp.85-92
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• 2022

In this article, we look at the application of BIM (Building Information Modeling) in sustainable infrastructures. In response to global warming, energy shortages, and environmental degradation, people are trying to build eco-friendly, low-carbon cities and promote eco-friendly homes. A "green" building is the entire life cycle of a building that includes maximizing the conservation of resources (energy, water, land, and materials), protecting the environment, reducing pollution, providing people with healthy, comfortable, and efficient use of space, and establishing harmony between nature and architecture. In the field of ecological and sustainable buildings, BIM modeling can be integrated into buildings with analog energy, air flow analysis, and solar building ecosystems. Using BIM technologies, you can reduce the amount of waste and improve the quality of construction. These technologies create "visualization" of digital building models through multidimensional digital design solutions that provide" modeling and analysis "of Scientific Collaboration Platforms for designers, architects, utility engineers, developers, and even end users. Moreover, BIM helps them use three-dimensional digital models in project design and construction and operational management.

• 정보기술응용연구
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• 제2권1호
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• pp.55-81
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• 2000

21세기 정보화 시대를 맞이하여 요즈음 전자행정에 대한 논의가 활발히 진행되고 있다. 종래의 작고 효율적인 사무행정조직이라는 협의의 시각에서 탈피하여 이제는 보다 광의의 관점에서 고객 중심적이고 양질의 정보서비스를 제공함으로써 행정의 효율성과 생산성을 증진시키는 것이 전자사무행정이라고 라고 보는 것이 타당하다. 그러나 지금까지 정부 기관을 중심으로 의욕적으로 추진되어온 전자행정을 위한 사무자동화 시스템 즉 전자결재 시스템은 업무의 생산성 향상에 크게 도움이 되지 못하였는데, 그 가장 큰 이유는 통합적 차원에서의 문서관리시스템 구축이 이루어지지 않고 전자결재위주의 시스템을 구축함으로서 문서의 생성 및 결재기능의 정보화에는 기여하였으나 생산된 문서에 대한 보관/보존/활용 및 폐기 활동에는 큰 도움이 되지 못하였기 때문이다. 따라서 문서의 생성, 결재, 유통, 배포, 검색, 활용, 보존, 폐기에 이르는 일련의 과정을 연속적으로 처리하는 통합전자문서관리시스템(IEDMS)의 구축이 필요하게 되었다. 본 연구는 이러한 인식을 바탕으로 현행전자문서관리체계의 문제점을 사례연구를 통해 분석한 후 통합전자문서관리체계 구현을 위한 시스템 요구기능을 도출함으로서 향후 전자문서관리체계 구축시 이를 하나의 기준으로 활용하도록 함으로서 효과적인 전자문서관리체계 정착에 기여하고자 한다.

• 산업공학
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• 제16권spc호
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• pp.1-6
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• 2003

This study deals with the problem of selecting 6 sigma projects. Traditionally, such selection was based on CTQ (critical to quality) or COPQ (cost of poor quality) derived within business units. Since the objective of 6 sigma is to achieve business goals in a short period, 6 sigma projects should be selected and carried out in coincidence with the whole company's strategies. This paper proposes two methods of selecting 6 sigma projects: one is to identify CTQ's by analyzing the company's BSC's (balanced score card) and then deploying them into subunits of the company and the other is to identify those projects with large hidden COPQ or cost of waste by applying value stream analysis and process model simulation to derive process cost models.

• 한국멀티미디어학회논문지
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• 제5권1호
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• pp.68-76
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• 2002

이동 호스트에서의 멀티캐스트에는 호스트이동성, 멀티캐스트 결정 문제, 삼각라우팅, 터널 집중성 문제, 재전송의 폭주, 대역폭 낭비 등의 문제가 있다. 무선에서의 대역폭 낭비는 전송률을 떨어뜨리는 결정적 요인이다. 본 논문에서는 대역폭 낭비를 해결하는 방법으로 호스트 이동성, 그룹관리, 멀티 캐스트 라우팅 프로토콜을 통합하여 신뢰성 있는 패킷 손실 복구를 할 수 있는 FIM을 제안한다. FIM은 IP Mobility Support와 IGMP, DVMRP를 통합하고, FEC와 수신자 기반 지역복구방식을 사용하였다. 제안한 프로토콜의 성능은 동종 독립 손실, 이종 독립 손실, 상호 의존적 손실로 나누어 분석 하였다. 손실 모델에 대한 평가는 전송그룹의 크기가 일정크기를 넘어서면, 지역그룹의 크기와 비례하여 성능이 향상되고 있음을 세 모델 전체에서 확인할 수 있었다. 따라서 제안된 프로토콜은 이동 호스트에서 데이터의 양과 수신자의 수가 많은 환경에서 효율적 임을 나타내었다.

• Environmental Engineering Research
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• 제25권3호
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• pp.299-308
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• 2020

Composting is among the most effective integrated waste management strategies used to recycle sewage sludge (SS) waste and generate a useful product. An encapsulated lifting system is a relatively new industrial-scale composting technology. The objective of this study was to evaluate the effectiveness of composting dewatered stabilized SS mixed with green waste using this new technology. The composting process was monitored by changes in the physico-chemical properties, UV-visible spectra, and fourier transform infrared (FTIR) spectra. The composting temperature was steady in the thermophilic range for 24 and 12 d in the intensive and maturation phases, respectively, which fulfilled the disinfection requirement. Moreover, the temperature increased rapidly to 76.8℃ within three days, and the thermophilic temperatures peaked twice and lasted longer than in traditional composting, which accelerated SS degradation and decreased the composting period necessary to obtain mature compost. FTIR spectroscopic analysis showed a diminished in methyl group derived from methylene C-H aliphatic groups because of organic matter degradation by microorganisms and an increased number of aromatic chains. The new technology may be a viable and sustainable alternative for SS management that converts waste into compost that is useful as a soil amendment.