• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.900-901
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• 2023

본 연구는 TFLite 기반의 경량화 AI 모델을 활용하여 쓰레기의 자동 분리수거 시스템을 구축하는 방법을 제안한다. 제안된 시스템은 객체 인식 기술을 활용해 쓰레기를 정확하게 분류하며, 테스트 결과 평균 90.33%의 mAP 성능을 나타낸다. Label 수와 데이터셋의 한계가 존재하지만, 본 연구를 확장하고 개선함으로써 자동 분리수거의 효율성을 더욱 높일 수 있을 것으로 기대된다.

• Proceedings of the Safety Management and Science Conference
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• 2000.11a
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• pp.91-94
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• 2000

본 연구에서는 차량용량이 같지 않은 복수의 다른 종류의 차량을 고려하여, 차량이 이동하면서 배달과 수거를 동시에 수행하고 수거지점으로부터 화물을 수거하여 차고지로 운송하는 귀로 화물(Backhauls)을 갖는 PDP(Pickup and Delivery Problem)문제를 그 연구 대상으로 한다. 동시에 차량을 통해 이동되는 품목이 단일 품목이 아니고, 배달 및 수거시간제약조건을 갖는 다품목 시간제약 수송차량 배차문제를 Time-space network를 이용하여 정수선형계획문제로 정식화한다. 이를 최적화 S/W LINGO를 이용하여 위의 모든 제약조건을 만족하면서 운용되는 차량수와 차량의 이동경로를 최소화하는 해를 구하고, 분석한 내용을 보여주고자 한다. 덧붙여 위 문제의 입·출력자료를 데이터베이스화하여 지리정보시스템(Geographic Information System : GIS)과 통합한 차량운행경로결정 지원시스템을 구축하기 위한 방법을 제시하고자 한다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.5 no.2
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• pp.50-61
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• 2002

This paper - following 'Functional requirement of marine waste cleaning ships and organization of the fleets'[1] - describes on the preliminary conceptual design procedure for the multi-purpose marine waste cleaning system for shallow waters. The working area of this system is Yellow Sea and part of South Sea of South Korea. As the first step, we determined the functional requirements including the daily target of waste collecting. Then, the preliminary conceptual design and general arrangements were carried out. In order to evaluate the safety and efficiency of this designed system, the stability check and the computer graphic simulation were carried out. Finally, the sea trial performance test of integrated systems in Yeosoo ports was performed and the designed system was shown its validity and effectiveness.

• Journal of the Korean Society of Marine Environment & Safety
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• v.14 no.1
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• pp.15-20
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• 2008

Contaminated sediments are the actual cause for deterioration of coastal-ecosystem. So the developed countries have been in the process of making an effort to develop new techniques for monitoring and solving this problem since 1960. In this research, suction type pump dredging system of pilot size for collecting the filth from the seabed has been designed and manufactured that can prevent or minimize the secondary pollution by filth diffusion. For the practical use, the application possibility of the developed system has been checked through a system performance test. And, the evaluation of system performance according to the underwater body type has been carried out for system optimization by using CFD. The performance tests for checking the efficiency of sediment collecting system are done under two conditions i.e. when the system is non-operational and when the system is self-propelled. The results of this research showed the possibility of the development of dredging system to remove just the upper parts of filth from seabed.

• Journal of the Korea Organic Resources Recycling Association
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• v.26 no.1
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• pp.13-19
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• 2018

25 local districts in Seoul have been running Waste Transfer Stations(WTSs) to secure regional collection bases, to connect between collection systems and waste treatment systems, and to commit various pre-screening of mixed wastes. There were, however, few previous researches to define how much WTSs are beneficial to waste collection system at least in Korea. So this study analyzed costs of waste collection systems with varied haul distances from waste sources(WSs) to WTS or building types of WTSs. Major results showed that the closer WTS is to WS or the cheaper the construction cost of WTS is, the lower the cost of waste collection system is. There was an additional result that WTS system with more than 15 km of total haul distance might be useful in Seoul and encapsulation of WTS in building or underground will make effective total haul distances longer up to 35km.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.5
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• pp.487-492
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• 2010

In this study, our system that the volume of collected human waste in the septic tank truck is measured accurately and the fee of disposing human waste can be calculated by using measured results has been developed. The level sensor and its circuits which can measure the height of the tank, the hand-held system that can be used by workers easily and simply with micro-controller have been developed. Also, this system has been built in the receipt printing function to charge for disposal fee. Even when working on a sloping field, this system can measure the accurate collected volume of human waste in the tank using the X-Y axis angle sensor. The results of this study expect that the popular complaints that generated from human waste can be reduced, the exportation possibility of our specialized systems can acquire foreign currency.

• Journal of Animal Environmental Science
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• v.17 no.2
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• pp.81-92
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• 2011

When we bury the infected poultry into the ground, we have many problems such as the difficulty of making sufficient area for burying, environmental contamination by the leachate, unpleasant ordor. Also, in case of burning the carcass of the infected poultry, there are some problems such as high cost, dust, unpleasant odor, etc. It could cause environmental contamination which many peoples and environmental organization complains about. In this study, we develop a treating system which treats the infected poultry carcass in a environmental method preventing the environment contamination. This system is composed of many processes. The euthanasia system uses rigid vinyl to trap and to do a euthanasia the infected poultry with lethal gas, carbon dioxide. And then, with the tractor attached grappler infected poultry carcass could be put into the carcass treating system. The euthanasia system uses rigid vinyl to trap the infected birds and to confine lethal gas, carbon dioxide. Infected poultry carcass are moved to carcass disposal system by collecting device which is attached at tractor. The carcass treatment system (capacity of disposal : 6.3 $m^3$) is installed on a truck and do one pass work, which is input, crush, stir, sterilize, and discharge treated carcass. 1,000 chickens was killed within 9.7min by $CO_2$ (300L/min) in the tent (10 $m^3$). The collecting device could carry 142 chickens at a time, and the movable carcass treatment system could sterilize 2 tons carcass per hour (at one time). This treatment systems was eco-friendly because it reduced the volume of carcass by 31.9% with no wastewater generation.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.216-219
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• 2020

본 논문은 폐기물 수거함 관리 프로그램을 구현하는 것을 통해 원격으로 생활 폐기물의 양을 측정, 관리함으로써 스마트 시티의 폐기물 관리 시스템을 구현하고자 하는 것을 목적으로 한다. 폐기물 수거함에 부착된 초음파 센서를 통해 폐기물의 양을 측정하고, 폐기물 수거 차량이 효과적으로 수거함을 방문할 수 있는 경로를 찾아 제시해줄 수 있도록 한다.

• Resources Recycling
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• v.26 no.5
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• pp.29-38
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• 2017

This study suggests optimal policy options for collection of used diapers through benchmarking of foreign countries and perception surveys. By conducting a survey, this study can identify the actual problems involved in the collection process and enhance the social acceptance toward diaper recycling policies. As a perception survey result, the economic burden of emission bags and sanitary issues were most important for the collection pilot test. Respondents thought that twice-a-week collection frequency was appropriate and that free emission bags might be preferable to participants. Currently municipal wastes are subject to waste management laws, which are applied by local governments. Diaper waste is categorized with municipal waste, so it seems to be treated by municipal waste systems. In terms of connection with government, possible alternatives were suggested to identify the relevant local government. Useful data could be obtained, to determine the economical viability of any future diaper recycling system implementation in the entire Seoul metropolis and adjacent areas of dense population.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.315-318
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• 2004

지금까지 대부분의 물류시스템은 생산자에서 최종 소비자에 이르는 생산물품의 수${\cdot}$배송에만 집중되어 왔으나, 최근 산업계에서는 기존의 수송시스템에 역방향 물류시스템을 통합하려는 시도가 이루어지고 있다. 본 논문에서는 배달화물과 수거화물이 혼합 적재되는 차량경로문제를 제안하고 이를 해결하기 위한 방안으로 유전알고리듬을 적용한 해법을 제시한다. 배달과 수거의 혼합적재를 허용함에 따라 고객지점에서는 적재된 혼합화물을 재배치하는 문제가 발생할 수 있다. 이 때 소요되는 적재화물의 재배치시간은 직관적인 수식으로 표현하였다. 유전알고리듬 개발과정에서 여러 가지 교차 연산자와 돌연변이 연산자들을 새롭게 고안하였다. 제안된 유전알고리듬 해법의 성능평가를 위하여 유사한 차량경로문제를 다루는 최신 알고리듬과 비교 계산실험을 수행하였다. 다양한 문제를 구성하여 실험한 결과, 제안된 유전알고리듬해법의 효과성이 입증되었다.