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Extrusion coating performances of iPP/LDPE blends
Kang, Gyung Bo,Kim, Mun Ho,Son, Younggon,Park, O. Ok Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of applied polymer science Vol.111 No.6
<P>The performance of iPP/LDPE blends in an extrusion coating process was investigated in the terms of coating width and draw-down ability. It is well known that iPP alone is not proper because of lower draw-down ability with severe draw resonance in elongational flow. To obtain higher draw-down ability, iPP was blended with LDPE. Additionally, iPPs having different molecular weight distribution (MWD) were used in this study to find out the effect of MWD of iPP on neck-in and draw-down ability. It was observed that iPP/LDPE blend with narrower MWD exhibits narrower coating width and higher draw-down ability. Neck-in and draw-down ability were correlated with shear and elongational properties obtained by several rheological measurements. From this study, the major rheological parameters affecting extrusion performance in iPP/LDPE blends could be assessed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009</P>
스마트폰 가속도 센서를 이용한 제스처 문자인식을 위한 센서 값 보정
강보경 ( Bo-gyung Kang ),배석찬 ( Seok Chan Bae ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.2
최근 출시된 IPhone이나 Android Phone들을 보면 인터페이스의 편리성과 엔터테이먼트적인 요소의 극대화를 위한 가속도센서, 디지털 나침반, 근접센서, 조도센서 등, 다양한 센서들을 디바이스에 포함하고 있다. 이들 중 가속도 센서를 이용한 다양한 인터페이스가 여러 스마트폰 게임과 어플리케이션들에서 사용되고 있는데 본 논문에서는 가속도 센서의 각축의 값들을 이용해 문자나 특정 입력 값을 기기에 전달할 수 있는 제스처 인식을 위한 센서 값들의 효율적인 사전 보정 알고리즘에 대해서 제안하고자 한다.
Java로 구현한 피부색 추출 기반 ATM 안면 인식 보안 시스템의 설계 및 구현
강보경 ( Bo-gyung Kang ),배석찬 ( Seok Chan Bae ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.1
요즘 현금카드나 신용카드를 훔치고 비밀번호를 알아내 ATM(현금자동지급기)에서 현금을 인출하는 범죄가 늘고 있는데 범인들은 대부분 선글라스, 안경, 마스크, 모자 등으로 얼굴을 가리고 인출을 함으로 은행의 CCTV는 범인색출에 거의 도움이 되지 않는다. 본 논문에서의 영상처리는 모두 Java언어를 사용하였으며 피부색을 사전 추출하는 과정을 거쳐 구현된 분류기능을 이용해 얼굴의 이목구비들의 위치를 인식하도록 한다. 이는 ATM이용자가 선글라스, 안경, 마스크 등으로 얼굴을 가리면 기기에서 애초에 서비스 받는 것을 불가능 하게 하여, 범죄를 예방할 수 있게 한다. 또한 카드의 사용자 정보와 서비스를 시도했던 시간과 캡쳐 이미지를 저장해 놓음으로써 범인의 인상착의, 알리바이 등을 확인하는데 크게 도움을 주는 ATM 안면 인식 보안 시스템의 가능성을 제안하고자 한다.
Impact of health education on the prevalence of enterobiasis in Korean preschool students
Kang, In-Soon,Kim, Dong-Hee,An, Hye-Gyung,Son, Hyun-Mi,Cho, Min Kyoung,Park, Mi-Kyung,Kang, Shin Ae,Kim, Bo Young,Yu, Hak Sun Elsevier 2012 Acta tropica Vol.122 No.1
<P><B>Graphical abstract</B></P><P>Providing health information about enterobiasis to parents could reduce the prevalence, as well as the rate of new infection or re-infection with <I>E. vermicularis</I> in their children.<ce:figure id='fig0005'></ce:figure></P><P><B>Highlight</B></P><P>► We evaluated the impact of health education on the prevalence of enterobiasis. ► We screened enterobiasis after education or medication. ► The infection rate in medication group was dramatically decreased. ► The infection rate of education group was shown to drop. ► New infection and re-infection cases in the education group were fewer.</P> <P><B>Abstract</B></P><P>Health education has been shown to be effective in slowing the spread of the disease, infectious disease in particular. To evaluate the impact of health education on the prevalence and pattern of new infection of enterobiasis, children from 6 kindergartens in Ulsan city, South Korea, were recruited after undergoing a screening for enterobiasis, and then divided into three groups, including group medication (GM), education (Edu), and control group. All children in GM group received medical treatment with 500mg albendazole twice, with 15 days interval. In the Edu group, only children diagnosed positive for <I>Enterobius vermicularis</I> eggs received medical treatment with 500mg albendazole twice, with 15 days interval and all parents in the group received brochures providing information about enterobiasis. In the control group, only children diagnosed positive for <I>E. vermicularis</I> eggs received medical treatment with 500mg albendazole twice, with 15 days interval, and no information about enterobiasis was provided to parents. Two post-treatment examinations were performed at three and six months after treatment. The infection rate in the GM group was dramatically decreased at 3 months, and this rate was almost the same as at 6 months after treatment. Infection rate of children in the Edu group was shown to drop from 9.9% to 3.0% at 3 months, and to 2.7% at 6 months after treatment; however, the infection rate in the control group continued to be higher than in the other two groups at both 3 and 6 months, with smaller change at 3 months compared to the other two groups. In addition, both new infection and re-infection cases in the Edu group were fewer, compared to those in the control group. In conclusion, although GM is the best method for eradication of enterobiasis, providing health information about enterobiasis to parents could reduce the prevalence, as well as the rate of new infection or re-infection with <I>E. vermicularis</I> in their children.</P>