지리정보 기반의 배너광고 시스템 개발

권재혁(Jae Hyuk Kwon),김동수(Dongsoo Kim) 한국전자거래학회 2009 한국전자거래학회지 Vol.14 No.2

최근 실세계의 지리정보를 웹에 표현하여 활용하는 애플리케이션들이 많아지고 있으며, GPS 기능이 내장되어 개인의 위치정보를 실시간으로 기록할 수 있는 장치의 보급이 점차 늘고 있다. 인터넷 비즈니스 기업은 지리정보를 활용하여 지역에 근거한 보다 유용한 서비스를 인터넷 사용자에게 제공할 수 있다. 현재 성공하고 있는 인터넷 기업은 대부분 Web 2.0 기술을 반영하고 있다. Web 2.0 기술은 사용자의 참여를 유발하고 있으며, 개방성과 공유를 강조한다. 특히 공개 API의 이용은 응용프로그램의 개발 비용을 절감시킬 수 있다. 본 논문에서는 공개 API를 활용하여 지리정보 기반의 배너광고 시스템을 설계하고 구현하였다. 지리정보를 활용한 지리정보 기반 배너광고 비즈니스 모델을 도출하고, 이를 반영한 프로토타입 시스템을 구현하여 제안한 비즈니스 모델의 운영 방식을 예시하였다. 마지막으로 제안한 비즈니스 모델의 가치 발생요인을 설명하여 본 연구에서 제안한 시스템의 장점을 기술하였다. 지리정보가 많이 활용되는 여행, 부동산 등의 분야에서 본 연구에서 제안한 비즈니스 모델을 적용한 배너광고 시스템이 실제로 활용될 것으로 기대된다. Lots of applications that represent and utilize geographic information on the Web have emerged on the Web. In addition, personal electronic devices equipped with GPS function, which can record personal location information in real time, are being increasingly adopted by people. Such geographic information enables Internet business companies to provide users more useful services based on the location information. Most successful Internet business companies have adopted and utilized Web 2.0 technologies, which promote users’ participation and emphasize openness and information sharing. Especially, using open APIs (Application Programming Interfaces) can reduce the costs of a program development. In this study, we design and develop a banner advertisement system based on geographic information using open APIs. We propose a business model using the advertisement system, and a prototype system has been illustrated in order to explain the proposed business model. Finally, we summarize the benefits of our system by describing factors generating values of the proposed business model. Hopefully, main ideas proposed in this paper can be applied to real industry sectors that use geographic information widely such as travel, real estate and so on.

순환골재를 뒷채움재로 이용한 보강토 옹벽 개발에 관한 연구

권재혁 ( Jae-hyuk Kwon ),김성우 ( Sung-woo Kim ),박병수 ( Byung-soo Park ) 한국환경기술학회 2013 한국환경기술학회지 Vol.14 No.2

본 연구는 건설폐기물인 순환골재를 옹벽 뒷채움재로 재활용하기 위한 실험적 연구이다. 순환골재에 대한 기본물성 및 역학시험을 실시하여 뒷채움재 적합여부를 판단하고, 현장 내시공성 시험 및 현장시험시공을 실시하여 그의 현장 거동을 파악하였다. 연구결과, 순환골재의 최대입경, No.200체 통과율, 소성지수, 내부마찰각은 구조물 기초설계 기준에 의한 뒷채움재 조건을 만족하는 것으로 나타났으며 현장 내시공성 시험결과, 경사방향의 인장강도가 시험 전보다 시험 후 약 7% 감소하는 것으로 분석되었다. 또한, 현장시험시공 결과, 최대 연직침하량은 토사와 순환골재 각각 14, 18mm로 침하에 대해 안정하였고 인장변형은 수평변위가 큰 상단에서 크게 발생하였으며 변형정도는 토사 0.08~0.65%, 순환골재 0.16~0.70%로 나타났다. This is experimental study to reuse the recycled aggregate as a construction waste for backfill. Suitability of backfill was determined by basic characteristic and mechanical test for the recycled aggregate. From the results, it was found that the maximum grain size, passing rate of No. 200, plastic index, internal friction angle of recycled aggregate satisfy the backfill conditions of design standard of foundation. It was also found that the tensile strength of main rib was decreased 7% after the test. After the field test, it was found that 14mm and 18mm of the maximum vertical settlement for the earth and recycled aggregate were in stable condition. Tensile deformation was significant at the top 0.08~0.65% and 0.16~0.7% of deformation rate were measured for the earth and aggregate, respectively.

뒷채움재 및 그리드 종류에 따른 인발특성

권재혁 ( Jae-hyuk Kwon ),김성우 ( Sung-woo Kim ),박병수 ( Byung-soo Park ) 한국환경기술학회 2013 한국환경기술학회지 Vol.14 No.1

본 연구는 보강토 옹벽의 뒷채움재로 순환골재의 적용 가능성을 알아보기 위한 뒷채움재-보강재의 인발특성에 대한 실험적 연구이다. 실내인발시험을 위한 대형 모형토조를 제작하고 지반을 조성한 후, 보강 그리드에 스트레인 게이지를 설치하고 공기압 주입식 에어백으로 상재하중을 가하여 인발실험을 실시하였다. 지반조성용 뒷채움재는 순환골재와 일반토사로 하였고 보강 그리드의 종류를 2가지로 변화시켜 각각의 시험 종류에 따른 마찰효율을 평가하였다. 연구결과, 뒷채움재가 순환골재일때 토사와 비교하여 그리드의 최대인장강도가 약 14~17% 증가하였고, 그리드에 따른 마찰강도의 변화는 크게 차이나지 않았으나 뒷채움재 종류에 따라 토사 보다는 순환골재일때 마찰강도 값이 크게 나타났다. In this study, the applications of the recycled aggregate as a backfill of reinforced has been estimated and experimented for the pull-out of backfill-reinforced material. After the large model box was made, pull-out test was performed installing strain gage at the reinforced grid and surcharged by pressurized air bag. Backfill was made by recycled aggregate and soil, estimated frictional efficiency was estimated according to 2 types of reinforced grid. From the results, the maximum tensile strength was 14~17% higher when backfill is recycled aggregate. Frictional strength was not changed according to grid. However, frictional strength was higher when backfill is recycled aggregate.

허용 부하량 산정을 위한 저수유량 산정 방안

정윤민,권재혁,강상혁,Jung, Yoon-Min,Kwon, Jae-Hyuk,Kang, Sang-Hyuk 한국공간정보학회 2009 한국공간정보학회지 Vol.17 No.2

우리나라 중소규모의 대부분 하천의 경우 유량 자료의 부족 또는 미계측 지역으로 인하여 효율적인 저수유량 산정이 어려운 실정이다. 따라서 본 연구의 목적은 수계별 환경용량을 고려한 허용부하량 산정을 위해 면적함수 관계식을 이용한 저수유량의 산정방안을 제시하는 것이다. 이를 위해 남한강 상류 지역의 유역면적 $606km^2$인 주천강 유역과 미계측 유역면적 $4,551km^2$인 옥동천 합류 후인 한강 유역을 시험하천으로 선정하였다. 적용결과, 주천 하류부의 저수 유량은 $1.9m^3/s$로, 미계측 유역인 옥동천과 한강의 합류 후의 저수유량은 $20.7m^3/s$로 계산되었다. 이를 영월군에서 고려하고 있는 BOD목표치 1.0-1.2mg/l로 계획하면 허용부하량은 각각 164-197kg/day 및 1,788-2,146kg/day로 추정되었다. 본 연구에서 제시한 허용부하량 산정방법은 자료가 충분하지 않은 유역이나 미계측 유역에 대해 유용하게 이용될 것으로 기대한다. The low fow analysis for small-mid sized river basins is very difficult because of insufficient flow data or ungauged basins. The objective of this study is to suggest effective method of low flow using area function method for calculating Total Maximum Daily Loads (TMDL) by considering environmental carrying capacity. Two watersheds which are Juchon watershed having $606km^2$ areas and ungauged watershed having $4,551km^2$ areas were selected for this study. As a result of application, the low flow in the downstream of Juchon River and the Han River after confluence of Okdong River were $1.9m^3/s$ and $20.7m^3/s$, respectively. Then we consider the target BOD of 1.0-1.2mg/l in Youngwol prefecture, the TDML was estimated 164-197kg/day and 1,788-2,146kg/day, respectively. This approach will useful for estimating TDML to insufficient watershed of flow data and ungauged watershed of flow data.

GIS를 이용한 도시화 진행상황의 평가 및 유출에 미치는 영향에 관한 연구

강상혁,권재혁,전병덕,Kang, Sang-Hyeok,Kwon, Jae-Hyuk,Jun, Byung-Duk 한국방재학회 2001 한국방재학회논문집 Vol.1 No.2

호우로 인한 수해피해의 발생은 유역의 지리적 사회적 환경요인이 결부되어 발생한다. 본 연구에서는 2000년 9월 일본의 동해지역에서 발생한 호우재해를 대상으로 도시화의 확대에 따른 수해 발생요인의 도출과 함께 유역 주민의 수해에 대한 의식조사를 실시, 분석하였다. 아울러 기존 GIS데이터의 비교 분석을 통하여 시가화율의 정량적인 산정과 그에 따른 도시화의 진전이 유출기구에 미치는 영향을 평가하였다. 또한 이를 유역주민에게 유효하게 전달 공유하는 방안을 제시하였으며, 이러한 수해정보의 공유는 재해에 대한 대처능력을 고양함으로써 호우에 따른 피해를 줄이는데 기여할 것이다. The flood damage due to heavy rainfall caused by not only geographical factor, but also social factors. In this paper we derived the flooding potential factors, and analyzed resident's understanding of flooding through the Tokai disaster of Japan, occurred in september 2000. Furthermore, the urban rate obtained by the data comparison between 1975 and 1985 using GIS is evaluated to estimate the effect of rainfall-runoff mechanism due to the urbanization. These efforts could be served as the information of flood damage for the communication with the residents and it would be helped the minimization of flood damage.

생물막 반응조에서 돈사폐수의 유기물 특성 및 동력학계수 산정

한동준,임재명,권재혁 江原大學校 産業技術硏究所 1996 産業技術硏究 Vol.16 No.-

This research was performed for the fundamental data using a advanced treatment process of piggery wastewater. Characteristics of influent wastewater was divided with various methods in fixed biofilm batch reasctor. Fractons of organic were divided into readily bioderadable soluble COD(Ss), slowly biodegradable COD(Xs), nonbiodegradable soluble COD(S?),and nonbiodegradable suspended COD(X?). Experimental results were summerized as following : i)biodegradable organics fraction in piggery wastewater was asbout 88.1 percent, and fraction of readily biodegrasdable soluble COD was about 66.1 percent. ii)Fractions of nonbiodegradable soluble COD was 11~12 percent, and soluble inert COD by metabolism was producted about 6~8 percent. iii) Active biomass fraction of attached biofilm was about 54.7percent, annd substrate utilization rate and maximum specific growth rate of heterotrophs were 8.315 d and 3.823 d? respectively.

여재의 개선에 따른 유기물 제거효율 및 질산화 비교

민선홍,김병욱,권재혁 三陟大學校 2000 論文集 Vol.33 No.2

Where control of algal growths in the receiving water is necessary to protect beneficial uses, removal or reduction of nitrogen in wastewater prior to charge may be desirable. An object of this study is development of nitrification(conversion TKN to nitrate) rate in domestic wastewater treatment. A bench scale reactor used in this study has reused media(SWPP media). This study was conducted to investigate the performance and bioflim characteristics of modified media(RUN 2) in comparison with conventional media(RUN 1) on wastewater treatment system. Influent BOD, COD and TKN concentration were ranged 254.1 to 270.4 mg/L, 473.0 to 498.4 mg/L and 19.3 to 21.4 mg/L, respectively. During operating time for 116 day, organic loading rates were 0.254 to 1.044 kgBOD/㎥/day and nitrogen loading rates were 19 to 86 gTKN/㎥day. The results were as follows ; Nitrogen removal efficiency was 22.3, 36.1, 90.4 and 95.8% in RUN 1 and 25.2, 75.1, 95.1 and 96.7% in RUN 2. Effluent NO₃-N concentration in RUN1 and RUN2 were 0∼15.54mg/L, 0.09∼15.99 mg/L, respectively.

재생여재를 이용한 폐수처리시 생물막의 생물·물리적 특성

권재혁 三陟大學校 産業科學技術硏究所 1998 産業科學技術硏究論文集 Vol.3 No.-

A correlation between the biofilm thickness and biomass density in a laboratory scale submerged media aeration system was evaluted. The laboratory units had Luffa type and SWPP media and the piggery wastewater was used as a substrate. Hydraulic retention time of the laboratory units were 1 day respectively and influent organic loading rate were 25.2 - 38 g COD/m²·day. Following conclusion can be drawn from the operational results : i) the maximum biofilm density of 130 mg/cm³was observed at biofilm thickness of 180 to 200 ㎛ ranges, ii) the active biomass content represented as VSS per unit area was increased up to 10 days of operating time, iii) the COD removal rate was rapidly increased up to the 200 ㎛ of biofilm thickness, however no further increment of COD removal rate was observed between 200 to 1,200㎛ of biofilm thickness.

하수슬러지의 건설재로의 이용 타당성에 관한 연구

권재혁,박병수 三陟大學校 1999 論文集 Vol.32 No.2

Feasibility of using the mixture of a wastewater sludge and additive as liner and the cover materials in disposal landfill. Granite weathered soil flyash, produced as a by-produced as a by-product in the power plant, were used as the primary additives to improve geotechnical engineering properties of sludge. For secondary additives, bentonite and cement were mixed with sludge to decrease the permeability and to increase the shear strength, irrespectively. Various kinds of laboratory test, required to evaluate the design criteria for the liner and the cover materials, were carried out by changing the mixing ratio of sludge with the additives. Basic soil property tests of specific gravity, grain size distribution, the liquid and the plastic limits were performed to evaluate their properties and to analyze their effects on permeability, compaction of mixtures. Various test results with mixtures were assessed to evaluate whether their properties met the requirements as the liner and the cover materials in waste disposal landfill.

소규모 축산폐수 처리를 위한 RBC/AFBR 공정의 Package화

임재명,권재혁,류재근 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

Using rotating biological contactor(RBC) with artificial endofleneus stage and aerobic fixed biofilm reactor(AFBR), organic material removal and biological nitrification of piggery wastewater has been studied at a pilot plant RBC was operated in the endogenous phase at a interval of every 25 days, The concentration of COD, BOO and TKN in influent wastewater were from 2,940 to 3,800 ㎎/L, from 1,190 to 1,850 ㎎/L and from 486 to 754 ㎎/L respectively, The maximum active biomass content represented as VSS per unit aera was 2.0㎎/㎠ and biofilm dry density of 17 ㎎/㎤ was observed at biofilm thickness of 900 ㎛. It was observed that the pilot scale RBC/AFBR process exhibited 72 percentage to 93 percentage of BOD removal, In order to obtain more than 90 percentage of BOD removal, the organic loading rate to the RBC/AFBR Process should be maintained less than 0,09 ㎥/㎡. day(125,9 gBOD/㎥.d), The TKN removal efficiencies was from 455 to 90,9 Percentage according to vary influent loading rate, It was estimated that the RBC/AFER Process consumed approximately 6,2 ㎎/L(as CaCO_(3) ) of alkalinity per 1 ㎎/L a of N_(3)-N oxidized as the nitrification took piace.