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폐 정보통신기기(스마트폰, 노트북 PC)의 자원화 가치 분석
박승수,정민욱,김성민,한성수,정인상,박지환,박재구,Park, Seungsoo,Jung, Minuk,Kim, Seongmin,Han, Seongsoo,Jung, Insang,Park, Jihwan,Park, Jaikoo 한국자원리싸이클링학회 2018 資源 리싸이클링 Vol.27 No.3
In this study, metal and nonmetal contents and their economic values in ICT devices such as smart phones and laptop computers were evaluated. The electronic devices made by LG and Samsung were disassembled into 5 parts, which are printed circuit board assembly, battery, display, case and other electronic components. Metal and nonmetal contents in these parts were analyzed, and their economic values were calculated via multiplying the materials' contents by metal price obtained from KOMIS or nonmetal exchange price acquired from Korean recycling markets. Finally, the materials' contents and values according to each electronic parts and electronic devices were calculated. The results showed that the value of the smartphones and laptop computers of LG are 4,449.6 KRW (28,506 KRW/kg) and 6,830.2 KRW (7,053 KRW/kg), and those of Samsung are 1,849.3 KRW (13,499 KRW/kg) and 6,667.5 KRW (4,831 KRW/kg), respectively. It was also found that most of the value was concentrated in batteries and printed circuit board assemblies. In addition, Co, Au and Cu were found to be the most valuable resources in the devices.
연구논문 - 에너지 , 환경분과 : 배연탈황용 석회석의 분쇄성과 반응성
박승수,김기형,박상용 ( Seung Soo Park,Ki Hyung Kim,Sang Yong Park ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1990 No.3
N/A The Grindability and reactivity of domestic limestones for wet flue gas desulfurization were measured. The Bond Work Index correlated well with the Hardgrove Index and can be expressed as B.W.I = 16.78 - 0.08(H.G.I). No dependence was found between grindability and reactivity of limestone. Relative reactivity of limestone was affected significantly by specific surface area and solution composition.
프라이버시 보호를 위한 V2V 통신 인증 서비스의 간략화
박승수,한근희,김기천,Park, Sung-Su,Han, Keun-hee,Kim, Keecheon 한국사물인터넷학회 2016 한국사물인터넷학회 논문지 Vol.2 No.1
One of the next generation of automotive V2V communication technology is a core technology for next-generation ITS as a technique used for communications between the vehicle. Looking at the existing V2V communication using the pseudonym certificate authentication service structure to meet the security requirements for privacy protection. Since the issuance of multiple certificates when needed authority in issuing and managing to use the pseudonym certificate issued once and it takes a lot of time. In this paper, we present the method utilizing a vehicle ID to meet the security requirements for the privacy protection without the use of a pseudonym certificate. 차세대 자동차 기술 중의 하나인 V2V 통신은 차량 간에 통신할 때 사용되는 기법으로 차세대 ITS의 핵심기술이다. 기존 V2V 통신 인증 서비스 구조를 살펴보면 프라이버시 보호에 대한 보안 요구사항을 충족시키기 위해 가명 인증서를 사용한다. 가명 인증서를 사용하기 위해 발급 및 관리하는 기관이 필요하고 한번 발급할 때 여러 개의 인증서를 발급하기 때문에 시간이 많이 소요된다. 본 논문에서는 가명 인증서를 사용하지 않고 프라이버시 보호에 대한 보안 요구사항을 충족시키기 위해 차량 ID를 활용한 기법을 제시하고자 한다.
가압반응기를 이용한 배연탈황석고로부터 α형 반수석고의 생성
박승수,김기형,안희수,박광규,Park, Seung-Soo,Kim, Ki-Hyoung,An, Hi-Soo,Park, Kwang-Kyu 한국공업화학회 2006 공업화학 Vol.17 No.6
유연탄을 연소하는 화력발전소의 탈황설비에서 생산된 배연탈황석고를 대상으로 가압반응기를 이용하여 수열반응을 통한 알파형 반수석고의 생성과정을 살펴보았다. 실험 결과 첨가제를 사용하지 않아도 반응온도 $120{\sim}140^{\circ}C$ 범위 하에서는 용해-재석출 기구에 의하여 알파형 반수석고가 생성되었으나 아스펙트 비가 매우 높은 침상형 결정이 생성되었다. 호박산나트륨을 첨가제로 주입한 결과 결정형상은 침상형에서 각주형으로 변화되었으며 혼수 비(water/powder ratio)는 33%까지 감소하였다. 호박산나트륨의 농도는 20 mM이 적정하였으며 반응도중 성형체의 붕괴를 방지하고 성형체의 기공부피에 의한 모세관 효과를 최대화하기 위한 최적의 성형체 성형압력은 $30kgf/cm^2$이었다. This study was performed to investigate the formation process of calcium sulfate ${\alpha}$-hemihydrate from FGD gypsum produced at thermal power plant burning bituminous coal. The experimental results showed that calcium sulfate $\alpha$-hemihydrate with a large aspect ratio was produced in the temperature range of $120^{\circ}C$ and $140^{\circ}C$ in the absence of additives through dissolution-recrystallization mechanism. It was also observed that addition of Na-succinate as a catalyst changed crystal shape from acicular to prismatic, resulting in decreased water/powder ratio down to 33%. Optimum concentration of Na-succinate was 20mM. It was confirmed that the optimum moulding pressure and moisture content of moulded body from FGD gypsum were $30kg_f/cm^2$ and between 10% and 15% respectively, which prevent moulded body from collapsing and maximize the capillary effect by given pore volume while autoclaving.
웹 기반 구성주의 교수-학습 모형을 지원하는 보털 사이트 구축
박승수,한규정,Park, Seung-Su,Han, Kyu-Jung 한국정보교육학회 2003 정보교육학회논문지 Vol.7 No.1
In order to educate learners who cope with quickly to the information society of twenty-first century, it is required to develop ability to make a plan oneselves, solve the problem by collecting and examining information with various method. The purpose of this study is develop a constructive information searching model, present contents meet with learner's grade then help teacher and learner can search information that needed teaching and learning. In addition to it, this study enable learners to participate learning by self-directing, at the same time cope-learn throuth interaction with members, design of web-site that can be shared. exchanged new various information.