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대규모 LPWA기반 네트워크에서 분산된 주차 공간 관리서비스의 설계 및 구현
박신열 ( Shinyeol Park ),정종필 ( Jongpil Jeong ),박동범 ( Dongbeom Park ),박병준 ( Byungjun Park ) 한국정보처리학회 2018 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.7 No.10
도시의 급속한 발전과 인구유입에 따른 차량의 증가로 부족한 도시의 주차 공간에 대한 효율적인 관리가 필요하고 사용자에게 보다 편리함을 제고할 필요가 증대되고 있다. 그러나 기존의 주차장 관리시스템은 공간적 및 시간적으로 제한되어 있거나, 편리함을 제공하지 못하고 있다. 본 논문에서는 광역의 분산된 주차 공간 관리서비스에 LPWA기반의 통신, IoT 클라우드를 구축하여 주차 공간 관리서비스에 대한 효율화 및 편리성을 높이도록 제안한다. 주차 센서는 주차장의 주차 공간 정보를 수집하며 저전력 광역 네트워크를 통해 전송되며, 모든 주차 데이터는 IoT 클라우드에서 처리되고 분석되어, 주차 공간관리 서비스 시스템을 통하여, 도시의 사람들에게 주차 가능 면적을 확인하도록 하여 시간적인 편리함과 주차 공간에 대한 면적 효율화를 제공한다. Due to the development of cities and the increase of vehicles, effective control of parking space management service in cities is needed. However, the existing parking lot management system does not provide limited or convenient service in terms of space and time. In this paper, we propose distributed parking space management service based on large scale LPWA (Low-Power Wide-Area). The parking sensor collects parking space information from the parking lot and is transmitted over a low-power wide network. All parking data is processed and analyzed in the IoT cloud. Through a parking space management service system in all cities, users are given the temporal convenience of determining the parking space and the area efficiency of the parking space.
Park, Jongpil,Song, Miyeon,Jung, Won Mok,Lee, Won Young,Kim, Hanggeun,Kim, Youngkwon,Hwang, Chahwan,Shim, Il-Wun The Royal Society of Chemistry 2013 Dalton transactions Vol.42 No.29
<P>Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (CZTS) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. First, Cu<SUB>2</SUB>SnS<SUB>3</SUB> (CTS) nanoparticles were synthesized by the sonochemical method with a 91.3% yield. Second, ZnS was coated on Cu<SUB>2</SUB>SnS<SUB>3</SUB> nanoparticles by the same method. Then, they were transformed into CZTS nanoparticles of 90–300 nm diameter by heating them at 450 °C for 1 hour. The ratios between Zn and Sn could be controlled from 0.20 to 1.32 by adjusting the relative concentrations of Cu<SUB>2</SUB>SnS<SUB>3</SUB> and ZnCl<SUB>2</SUB>. With relatively lower Zn : Sn ratios (0.20–0.41), there was a mixture of CTS and CZTS nanoparticles. The prepared nanoparticles show different band gaps from 1.19 to 1.52 eV depending on the zinc to tin ratio. In this sonochemical method without using any toxic or high temperature solvents, the specific stoichiometric element ratios in CZTS were controllable on demand and their experimental results were always reproducible in separate syntheses. The CZTS nanoparticles were investigated by using X-ray diffraction, a UV-Vis spectrophotometer, a scanning electron microscope, Raman spectroscopy, and a high resolution-transmission electron microscope.</P> <P>Graphic Abstract</P><P>Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (CZTS) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3dt50849h'> </P>
Park, Jongpil,Lee, Won Young,Hwang, Cha Hwan,Kim, Hanggeun,Kim, Youngkwon,Shim, Il-Wun Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.8
$Cu_2SnSe_3$ (CTSe) and $Cu_2ZnSnSe_4$ (CZTSe) nanoparticles were synthesized by sonochemical reactions under multibubble sonoluminescence (MBSL) conditions. First, $Cu_2SnSe_3$ nanoparticles were synthesized by the sonochemical method with an 85% yield, using CuCl, $SnCl_2$, and Se. Second, ZnSe was coated on the CTSe nanoparticles by the same method. Then, they were transformed into CZTSe nanoparticles of 5-7 nm diameters by heating them at $500^{\circ}C$ for 1 h. The ratios between Zn and Sn could be controlled from 1 to 3.75 by adjusting the relative concentrations of CTSe and ZnSe. With relatively lower Zn:Sn ratios (0.75-1.26), there are mostly CZTSe nanoparticles but they are believed to include very small amount of CTS and ZnSe particles. The prepared nanoparticles show different band gaps from 1.36 to 1.47 eV depending on the Zn/Sn ratios. In this sonochemical method without using any toxic or high temperature solvents, the specific stoichiometric element Zn/Sn ratios in CZTSe were controllable on demand and their experimental results were always reproducible in separate syntheses. The CZTSe nanoparticles were investigated by using X-ray diffractometer, a UV-Vis spectrophotometer, scanning electron microscope, Raman spectroscopy, and a high resolution-transmission electron microscope.
Cognitive Bias and Information Security Research: Research Trends and Opportunities
Park, Jongpil,Oh, Chang-Gyu The Korea Society of Management Information System 2016 Asia Pacific Journal of Information Systems Vol.26 No.2
Human cognition and decision-making related to information systems (IS) is a major area of interest in IS research. Among these areas, cognitive bias rooted in behavioral economics is gaining considerable attention from researchers. In the present study, we identify the role of cognitive biases and discuss how they shape the information security behavior. We also seek research opportunities to provide directions and implications for future research.
Jongpil Park,오익근 한국관광학회 2012 International Journal of Tourism Sciences Vol.12 No.1
Social media marketing plays an increasingly important role in the hotel and tourism industry. This study examines how social networking services, microblogs and social commerce sites are used in the field of tourism in a case study of KAL (Korean Airline) Tour, one of the leading travel agencies based in Korea. This study shows that companies make a substantial amount of profits from their investments in social media marketing activities. KAL Tour uses a variety of social media for effective social marketing activities. By understanding the characteristics of each social medium, the effectiveness of the company’s marketing activities is maximized. As such, this case study provides opportunities to understand consumer behaviors influenced by new information technologies.