서울시 저영향개발(LID) 시범 시설에 대한 편익 특성 연구

이승원(Seung Won Lee),김이호(Reeho Kim) 대한환경공학회 2016 대한환경공학회지 Vol.38 No.6

서울시는 ‘건강한 물순환 도시’ 조성을 비전으로 선포하고 도시 물환경 악화에 따른 문제를 해결하기 위한 노력을 기울이고 있다. 이를 위해 서울시는 빗물의 침투 및 저류 기능 등을 이용하는 저영향개발(LID) 시설의 설치를 확산시키기 위한 정책 및 제도 개선을 추진하고 있다. 이러한 저영향개발 시설은 공공이 선도하는 물순환 도시 조성과 이를 위한 빗물의 표면유출 억제와 물이용 효율화를 목적으로 하고 있다. 또 악화된 물순환과 물환경을 회복하기 위해 다양한 저영향개발 시설이 설치 및 운영되고 있다. 그러나 이에 대한 체계적인 경제성 평가를 위한 편익 분석 방안은 미흡한 실정이다. 따라서 본 연구에서는 저영향개발 시설의 경제적․환경적․사회적 편익을 다각적으로 분석하기 위해 저영향개발 시설별로 물․에너지․대기질 개선․기후변화 대응의 4개 카테고리별로 편익 분석항목을 선정하였다. 이러한 카테고리별 분류에 따른 직간접인 편익효과의 정량화 및 가치 평가 결과, 각 시설별로 연간 1,191원의 단위면적 당 편익이 발생하는 것으로 산정되었다. 분석 항목별 편익 분포 특성은 시설의 특성에 따라 다양한 것으로 나타났다(물: 30~90%, 에너지: 4~44%, 대기질 개선: <1~2%, 기후변화 대응: 5~22%). TBL 분석 결과, 시설별로 경제적 편익의 비중이 가장 큰 것으로 나타났으며(75~90%), 환경적 편익(<1~2%) 및 사회적 편익(9~24%)이 산정되었다. 향후, 현재의 개별 저영향개발 시설에 대한 편익 분석 방안을 기반으로 단지 및 지구 단위의 물순환 연계 시스템이 적용될 경우, 도시 열섬 현상 및 홍수 재해 예방 등 저영향개발 시설 운영의 편익에 대한 시너지 효과 등을 평가할 수 있을 것으로 기대된다. Seoul metropolitan has established a vision as ‘Healthy water-cycle city’ to resolve urban water-environmental deterioration. And it established administrative structure to expand Low Impact Development (LID) facilities to recover aggravated water-cycle and water-environment. Therefore, various LID facilities are constructed and operated, however, benefit analytic plans for systematic valuation are insufficient. In this study, to analyze economic, environmental and social benefits of LID facilities, contents for benefit analysis were selected and categorized as water, energy, air quality and climate changes. As a result of quantification and valuation to the beneficial effects, LID facilities showed the total benefit as 1,191~3,292 won/yr. Characteristics of benefit distribution by analysis contents were various reflecting functional characteristics of each LID facility (Water: 30~90%, Energy: 4~44%, Air quality: <1~2%, Climate change: 5~22%). As a result of Triple Bottom Line analysis, economic benefit showed the greatest portion as 75~90%. As further studies, suggested benefit assessment plans for each LID facility should be applied to inter-connected LID systems on complex-scaled area, and synergy effects by various LID systems would be evaluated such as prevention of heat island and flood disasters.

콘크리트 포장의 구조해석

이승원,윤경구,김지원,유태석,Lee, Seung-Won,Yun, Gyeong-Gu,Kim, Ji-Won,Yu, Tae-Seok 한국도로학회 2002 도로포장공학회지 Vol.4 No.2

선별이적처리를 통한 운영 중인 매립지의 재이용 방안

이승원 ( Seung-won Lee ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.3

In this study, the amount of landfill by on-site excavation landfill waste was calculated, and. the density was corrected to calculate the reuse capacity of the landfill. The amount of landfill waste that has been brought in is expected to be 6,647,056 ton. In addition the reuse and waste produced by the sorting transfer method was plastic, and throughput of 910,312 ton. The density-corrected reclaimed landfill capacity was estimated to be 2,276,000 m³. The landfill amount calculated by excavation was 841,201 ton, and the reclaimable landfill capacity was predicted to be 2,103,000 m³. Assuming that 930,312 ton of plastic are sorted and 30 % of 273,094 ton are processed in relation to the SRF power facility, that will produce 0.96 kW/ton(SRF standard) of electricity at 40,000 won/kW and profit of 17,477,990,400 won is expected. Currently, there are problems in securing the site of a new landfill and stabilizing the natural landfill, so if is useful for the early stabilization and efficient operation of the landfill that is being operated by introducing the selective transfer method.

망막정맥폐쇄와 당뇨망막병증에서 황반부종 치료를 위한 유리체내 베바시주맙 주입술의 효과

이승원,김무상,김응석,곽형우,유승영,Seung Won Lee,MD,Moo Sang Kim,MD,Eung Suk Kim,MD,Hyung Woo Kwak,MD,Seung Young Yu,MD 대한안과학회 2009 대한안과학회지 Vol.50 No.2

Purpose: To evaluate the long-term results of intravitreal bevacizumab injection for macular edema (ME) due to retinal vein obstruction (RVO) and diabetic retinopathy (DR). Methods: The objects of study were patients with decreased visual acuity due to ME with RVO and DR for whom intravitreal injections of 1.25 mg (0.05 ml) bevacizumab were repeated three times with an interval of six weeks and who were available for a follow-up period of more than 12 months. The patients underwent additional bevacizumab injections if ME increased as assessed by optical coherence tomography (OCT). Best-corrected visual acuity (BCVA) and central macular thickness (CMT) were measured at baseline and follow-up visits. Results: There were 16 patients with RVO and 18 patients with DR. In the RVO group, the mean length of follow-up was 12.4±1.1 months, the mean baseline BCVA was 0.75±0.32 and the final BCVA was 0.42±0.25, a difference that was statistically significant (p<0.05). The mean CMT at baseline was 588.5±301.0 μm and this decreased to a mean of 191.8±112.0 μm at the end of the follow-up period (p<0.05). In the DR group, the mean length of follow-up was 15.4±3.2 months, the mean baseline BCVA was 0.63±0.33 and the final BCVA was 0.61±0.37, a difference that was not statistically significant (p>0.05). The mean CMT at baseline was 462.0±195.0 μm and decreased to a mean of 282.2±177.3 μm at the end of the follow-up period (p<0.05). Conclusions: In RVO and DR, three injections of intravitreal bevacizumab with an interval of six weeks and additional injections as indicated were effective in reducing ME and showed especially good results in improvement of visual acuity for ME due to RVO.

건조방법에 따른 하수슬러지 건조속도 비교 및 경제성 평가

박성훈 ( Seong-hun Park ),김한석 ( Han-seok Kim ),이승원 ( Seung-won Lee ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.3

In this study investigated the effect of the chemical injection ratio on the drying rate of sewage sludge. Then the economic efficiency was evaluated by comparing the results of the NIR(near infrared ray) and microwave drying rate test. The near infrared ray device showed drying speed of 31.9 %, 28.1 %, and 27.1 % at polymer dose ratio of 8 %, 10 %, and 12 %, respectively. Compared to 8 % polymer dose ratio, polymer dose ratio of 10 % and 12 % showed differences of 8.0 % and 13.6 % respectively, suggesting that drying efficiency decreased as polymer dose ratio increased. The microwave device showed drying speed of 26.2 %, 24.3 %, 21.3 % at polymer dose ratio of 8 %, 10 %, and 12 %, respectively. Compared to 8 % polymer dose ratio, polymer dose ratio of 10 % and 12 % showed differences of 5.2 % and 13.4 % respectively, suggesting that drying efficiency decreased as polymer dose ratio increased. Drying evaluation estimated the treatment cost of near infrared ray device at optimal dose ratio(6 %) was 35,591 won/ton while that of actual dose ratio(8 %) was 38,928 won/ton. Drying evaluation estimated treatment cost of microwave device at optimal polymer dose ratio(6 %) and at 8 % to be 16,683 won/ton and 18,352 won/ton, respectively.

TMS320C6201을 이용한 적응 다중 전송율을 갖는 광대역 음성부호화기의 실시간 구현

이승원,배건성,Lee, Seung-Won,Bae, Keun-Sung 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.9C

본 논문에서는 적응 다중 전송율을 갖는 광대역 음성부호화기인 AMR-WB 의 알고리즘을 분석하고, TI사의 고정소수점 DSP인 TMS320C6201를 이용한 실시간 구현 결과를 제시한다. AMR-WB 음성부호화기는 두 가지 대 역으로 분리된 신호가 독립적으로 부호화되며, 저대역 신호는 ACELP 방식으로、 고대역 신호는 잡음 여기신호와 선형예측 합성필터를 사용하는 방식으로 각각 합성된다. 구현된 AMR-WB 음성부호화기는 프로그램 메모리와 데이터 메모리가 각각 218 kbytes, 92kbytes의 크기를 가지며 , 한 프레임인 20 ms를 처리하는데 평균 920,267 정도의 클릭 수가 사용되어 약 5.75 ms의 시간이 소요 되였다. 또한, DSP로 구현한 AMR-WB 음성부호화기의 결과와 PC에서 시뮬레이션 한 결과가 서로 일치함을 확인하였다. This paper deals with analysis and real-time Implementation of a wide band adaptive multirate speech codec (AMR-WB) using a fixed-point DSP of TI's TMS320C6201. In the AMR-WB codec, input speech is divided into two frequency bands, lower and upper bands, and processed independently. The lower band signal is encoded based on the ACELP algorithm and the upper band signal is processed using the random excitation with a linear prediction synthesis filter. The implemented AMR-WB system used 218 kbytes of program memory and 92 kbytes of data memory. And its proper operation was confirmed by comparing a decoded speech signal sample-by-sample with that of PC-based simulation. Maximum required time of 5 75 ms for processing a frame of 20 ms of speech validates real-time operation of the Implemented system.

약품 주입비율에 따른 하수 슬러지 형태(소화·비소화)가 건조효율에 미치는 영향 - 근적외선 및 마이크로파를 중심으로 -

이승원,Lee, Seung-Won 한국환경과학회 2021 한국환경과학회지 Vol.30 No.3

In this study, we evaluated the effect of the type of sewage sludge (digested, non digested) on drying efficiency according to the polymer injection rate. The drying characteristics were shown using a near-infrared ray (NIR) and a microwave. As a result of the drying characteristics with NIR at a polymer dose ratio of 8%, the heating up period is up to 6 minutes after the start of the drying experiment. Afterwards, the constant rate drying period of the digested sludge (A, C and G sites) was 6 minute → 18 minute, showing a rapid decrease in moisture. On the other hand, non digested sludge (B, D, E, F, H, I, J and K sites) showed gradual drying characteristics compared to digested sludge until complete drying (10%). As the polymer dose ratio of 10% and 12%, the heating up period for digested sludge is up to 6 minute after the start of the experiment. Afterwards, the constant rate drying period of the digested sludge was 6 minute → 20 minute, showing a rapid decrease in moisture. On the other hand, the heating up period of non digested sludge was up to 10 minute after the start of the experiment, and the constant rate drying period was 10 minute → 22 minute, which was shorter than digested sludge. As a result of the drying characteristics with microwave at a polymer dose ratio of 8%, 10% and 12%, the constant rate drying period the digested sludge was 4 minute → 20~22 minute, showing a rapid decrease in moisture. On the other hand, non digested sludge of the constant rate drying period was 4 minute → 22~30 minute, which was longer than digested sludge.

기타 두경부 병변에서의 보툴리눔 독소의 이용

이승원,Lee, Seung Won 대한후두음성언어의학회 2012 대한후두음성언어의학회지 Vol.23 No.2

The usages of botulinum toxin were most commonly for the treatment of spasmodic dysphonia in the otolaryngology field. It has been not only widely used in otolaryngology-Head Neck surgery but also plastic surgery, ophthalmology, rehabilitation medicine, and orthopedics. Now botulinum toxin is used such as blepharospasm (excessive blinking), strabismus, cosmetic, muscle spasms, upper motor neuron syndrome, severe primary axillary hyperhidrosis (excessive sweating), cervical dystonia (spasmodic torticollis), chronic migraine, bruxism, and achalasia. The indication of this drug still gradually expanding with the times. In this articles, the author will demontrate how to use the botulinum toxin for treating cricopharyngeal spasm, arytenoid dislocation, sialocele, Frey syndrome, contact granuloma, bilateral vocal fold paralysis, and mutaional falsetto instead of conventional surgical treatment.

실시간 위치 기반 서비스를 위한 확장 SLDS 설계 및 구현

이승원,강홍구,홍동숙,한기준,Lee, Seung-Won,Kang, Hong-Koo,Hong, Dong-Suk,Han, Ki-Joon 한국공간정보학회 2005 한국공간정보시스템학회 논문지 Vol.7 No.2

최근 이동 컴퓨팅 기술과 무선 측위 기술이 급속도로 발전하고 무선 인터넷이 보편화됨에 따라 이동체의 위치 정보를 활용하는 위치 기반 서비스(LBS: Location Based Service)가 다양한 분야에서 제공되고 있다. 위치 기반 서비스를 제공하기 위해서는 이동체의 위치 정보를 주기적으로 저장하는 위치 데이타 서버가 필요하다. 기존에는 이동체의 위치 데이타를 저장하기 위해서 GIS 서버를 사용해 왔다. 하지만 GIS 서버는 정적 데이타를 기반으로 설계되었기 때문에 이동체의 위치 데이타를 저장하는데 적합하지 않다. 따라서, 본 논문에서는 이동체의 위치 데이타를 관리하기 위해 제안된 클러스터 기반 분산 컴퓨팅 구조를 갖는 GALIS(Gracefully Aging Location Information System) 아키텍처의 서브 시스템인 SLDS(Short-term Location Data Subsystem)를 확장하여 실시간 위치 기반 서비스를 위한 확장 SLDS를 설계 및 구현하였다. 확장 SLDS는 TMO(Time-triggered Message-triggered Object) 프로그래밍 기법을 이용하여 위치 데이타 처리의 실시간성을 보장하며, 이동체 데이타를 다수의 노드에 적절히 분산시킴으로써 대용량 위치 데이타를 효율적으로 관리할 수 있다. 그리고, 메인메모리에서 위치 데이타를 관리하기 때문에 검색 및 갱신 오버헤드가 적다. 또한, 실험을 통하여 확장 SLDS는 기존에 제시된 SLDS 보다 더 효율적인 저장과 부하 분산을 수행한다는 것을 확인하였다. Recently, with the rapid development of mobile computing, wireless positioning technologies, and the generalization of wireless internet, LBS (Location Based Service) which utilizes location information of moving objects is serving in many fields. In order to serve LBS efficiently, the location data server that periodically stores location data of moving objects is required. Formerly, GIS servers have been used to store location data of moving objects. However, GIS servers are not suitable to store location data of moving objects because it was designed to store static data. Therefore, in this paper, we designed and implemented an extended SLDS(Short-term Location Data Subsystem) for real-time Location Based Services. The extended SLDS is extended from the SLDS which is a subsystem of the GALIS(Gracefully Aging Location Information System) architecture that was proposed as a cluster-based distributed computing system architecture for managing location data of moving objects. The extended SLDS guarantees real-time service capabilities using the TMO(Time-triggered Message-triggered Object) programming scheme and efficiently manages large volume of location data through distributing moving object data over multiple nodes. The extended SLDS also has a little search and update overhead because of managing location data in main memory. In addition, we proved that the extended SLDS stores location data and performs load distribution more efficiently than the original SLDS through the performance evaluation.

손해보험 분쟁조정사례 - 고지의무 위반을 이유로 한 사기 의사 유무의 판단

이승원,Lee, Seung-Won 한국화재보험협회 2014 防災와 保險 Vol.151 No.-