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Implementation of network-based video surveillance system (영상을 이용한 네트워크 기반 감시 시스템 구현)

  • Lee, Ji-Hoon;Kim, Sun-Hyeng
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.510-512
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    • 2015
  • Recently, people fear is growing because of the various crimes that may occur when you go out. The growing is interest in security systems for the protection of an individual's property. In this paper, to establish a single central server based on the home network when intruders access to city, such as image processing values obtained through the IP camera and distance values disciplined use an ultrasonic sensor the user for an attacker city that will connect to the server the surveillance system provides the information that is received and implemented.

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Exhaust Performance of a Kitchen Hood System with a Supply Air Slot on a Kitchen Table (조리대에 급기구를 가진 주방 레인지후드의 배기 성능)

  • Sung, Sun-Kyung
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.28 no.12
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    • pp.489-494
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    • 2016
  • There have been many cases when an air curtain installed in the apartment could not remove the gases well, such as carbon dioxide and particles like as smoke, oils, and vapors generated during cooking to disperse pollutants into the room. This study used a numerical analysis to show how the pollutant-removing performance of the range hood is changed when the air curtain is installed front of the kitchen table. The result of this study was that when the air amount supplied by an air curtain through the slot was about 50% of the exhaust amount, the capturing efficiency of the range hood for pollutants increased 90% more than without an air curtain. Even when the amount of supplied air was small, the capturing efficiency improved markedly with the use of an upward air curtain. In case that the air flow rate of the slot was greater than 60%, the capturing efficiency decreased.

Wireless PKI Based Certificate Verification Using Virtual Identifier (무선 PKI 기반의 가상 식별자를 이용한 인증서 검증)

  • Choi Seung-Kwon;Shin Jung-Won;Shin Dong-Hwa;Kim Sun-Chul;Lee Byong-Rok;Cho Young-Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.8A
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    • pp.804-813
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    • 2006
  • In wireless Internet environment that demand of wireless Internet service increase steadily, wireless PKI(Public Key Infrastructure) service is appearing on stage as necessary essential base technology for information protection service offer, In this paper, we propose the method for verification to reduce the communication overload using VID to CSMP made with a goal of the performance guarantee for security and use in a real time and examine the existent certificate verification methods. The performance of security and the use in a real time is guaranteed by managing the note of authentification by the person who verifies and reducing the amount of the data transmission using VID.

Studies on the Surface Color and Tensile Property of Hair according to Bleaching Treatment (모발(毛髮)의 탈색정도(脫色程度)에 따른 인장특성(引長特性)과 표면색 변화 연구(表面色 變化 硏究))

  • Kim, Kyung-Sun;Jeon, Dong-Won;Ha, Byung-Jo
    • Journal of Fashion Business
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    • v.10 no.1
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    • pp.94-105
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    • 2006
  • Hair bleaching is a treatment process in which the melanic pigment is oxidized by hydrogen peroxide. With the increase of the number of treatments, $1{\sim}10$ levels of various colors develop, the hair luster diminishes, and the appearance becomes very rough. In this study, by changing the number of hair bleaching and bleaching conditions, the changes in the degree of hair damage and its process were observed through the use of scanning electron microscopy. The color changes were also compared through the use of spectrophotometer. In order to study the physical changes of the bleached hairs and to search for the optimum conditions to keep the hair damages minimum during bleaching, tensile properties were measured and reviewed. By increasing the number of hair bleaching and by the severe conditions, the scales became eroded and the protection layers were decreased, and the oxidation reached the inner sectors resulting in rough surface and fibrillation. The surface of the hairs became bright yellowish and transparent by the bleaching of melanic pigments or by the destruction of pigments. With the increase of bleaching degree, in terms of physical changes, the breaking strength decreased while the elongation increased a little.

Molecular Characteristics of Phytophthora katsurae Using PCR-SSCP Analysis (PCR-SSCP 분석에 의한 Phytophthora katsurae의 분자생물학적 특성)

  • Lee, Sun-Keun;Jang, Ha-Na;Lee, Dong-Hyeon;Lee, Sang-Hyun;Lee, Sang-Yong;Lee, Jong-Kyu
    • Research in Plant Disease
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    • v.17 no.2
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    • pp.169-176
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    • 2011
  • Phytophthora katsurae is the fungus responsible for chestnut ink disease. The objectives of this study were to determine if a single-strand conformation polymorphism (SSCP) analysis of rDNA-ITS region, elongation factor 1 alpha gene and ${\beta}$-tubulin gene could be used for rapid identification and genetic diversity of P. katsurae, and to assess the potential use of the SSCP technique as a diagnostic tool for P. katsurae. Each regions amplified by PCR using primers designed to overlap the genus Phytophthora were characterized for the Phytophthora species. PCR products were denatured and electrophoresed for SSCP analysis. P. katsurae isolates showed an unique pattern in SSCP analysis and were easily distinguished from other Phytophthora species used as the control. This indicates that SSCP analysis is an useful technique for distinguishing Phytophthora species from genetically close relatives, and show that the SSCP analysis of each region is an efficient detection tool for P. katsurae. But PCR-SSCP analysis of single-gene may have difficulty in distinguishing P. katsurae from other Phytophthora species. Therefore, PCR-SSCP analysis of multi-genes can be useful for rapid and effective identification of P. katsurae.

A Cost-Benefit Analysis of Groundwater Supply through Pumping Well Technology

  • Kim, Sun G.
    • Proceedings of the Korea Technology Innovation Society Conference
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    • pp.479-487
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    • 2015
  • In Korea, there are 1,474 thousand pumping wells nationwide which account for about 12% of total water use in 2012. As much as 39 hundred million tons of groundwater were used while 333 hundred million tons of total water were supplied in 2012. Because the water management authority projects that water demand will exceed supply by 2021, the authority is planning to extensively expand groundwater use in accordance with economic feasibility. Using the basic frameworks of cost-benefit analyses of the World Bank and the US Environmental Protection Agency (US EPA), the objective of this study is to examine the costs and benefits of the expansion of Korea's groundwater extraction through pumping wells. We conclude that the BC ratio of the groundwater pumping wells is 2.98. This signifies that the benefits are 2.98 times higher than the costs. The benefits include use and non-use values of pumping wells while the costs include the installation and maintenance of new wells, in addition to the restoration and pollution costs of abandoned wells, as well as fees for water quality tests, etc.

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A Study of the Architectural Characteristic Depending upon the Module in the BIPV System (BIPV 시스템에서의 모듈 종류에 따른 건축적 특성 연구 - 채광형 시스템을 중심으로 -)

  • Lee, Eung-Jik;Lee, Chung-Sik
    • 한국태양에너지학회:학술대회논문집
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    • pp.196-202
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    • 2008
  • Effective climate protection is a most important tasks of our time. The BIPV is one of the most interesting and promisingly possibilities of an active use of solar energy at the building. In this study it was analyzed by the case study the function of the requirement of the BIPV-module as building material and this architectural characteristic according to the kind of the module. Therefore the goal of this study is to get securing the application information of BIPV as windowpane. BIPV modules are manufactured in the form of G/G. In the case of the crystal type the Transparent and the light Transmission is to be adjusted by the spacer attitude of the cell. Although this type could not be optimal for light effect of indoors because of the inequality of shade, the moving shade play makes a dramatic Roomimage by the run of sun. The application of this type would be for canopy, window or roof in the corridor or resounds. With amorphous the type it is to be manufactured simply largely laminar, and thus that will shorten building process. There is a relatively good economy to use and to the window system easily. After the production technology is easy the transparency of the modules to adjust, and the module shows to a high degree constant characteristics of light permeability and transparency. Without mottle of module shade is good the use for the window or roof glazing of office, library, classroom, etc. to adapt. The BIPV modules took generally speaking a function as building material to the daylight use, shading, isolation and also to the sight. That means that BIPV modules have as multifunctional system to sustainable architecture good successes and they are at the same time as Design element for architecture effectively.

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A Cost-Benefit Analysis of Groundwater: Pumping Wells in Korea (지하수의 경제성 평가 연구: 지하수 관정을 중심으로)

  • Kim, Sun Geun
    • Economic and Environmental Geology
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    • v.47 no.3
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    • pp.219-225
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    • 2014
  • In Korea, there are 1,474 thousand pumping wells nationwide which account for about 12% of total water use in 2012. As much as 39 hundred million tons of groundwater were used while 333 hundred million tons of total water were supplied in 2012. Because the water management authority projects that water demand will exceed supply by 2021, the authority is planning to extensively expand groundwater use in accordance with economic feasibility. Using the basic frameworks of cost-benefit analyses of the World Bank and the US Environmental Protection Agency (US EPA), the objective of this study is to examine the costs and benefits of the expansion of Korea's groundwater extraction through pumping wells. We conclude that the BC ratio of the groundwater pumping wells is 2.98. This signifies that the benefits are 2.98 times higher than the costs. The benefits include use and non-use values of pumping wells while the costs include the installation and maintenance of new wells, in addition to the restoration and pollution costs of abandoned wells, as well as fees for water quality tests, etc.

Comparative Study of Groundwater Threshold Values in European Commission and Member States for Improving Management of Groundwater Quality in Korea (국내 지하수 수질관리체계 개선을 위한 유럽 지하수 문턱값 비교)

  • Nam, Sun-Hwa;Lee, Woo-Mi;Jeong, Seung-Woo;Kim, Hye-Jin;Kim, Huyn-Koo;Kim, Tae-Seung;An, Youn-Joo
    • Journal of Soil and Groundwater Environment
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    • v.18 no.3
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    • pp.23-32
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    • 2013
  • Korean groundwater quality standards were established in 1994, and revised in 2003 and 2010. The substances for which standards have been developed are classified into two groups, general pollutants, 4, and specific pollutants, 15. The standards have been applied to household water use, agriculture, aquaculture, and industrial use. However, there is no systematic methodology for either selecting candidate substances or establishing groundwater standards. We investigated various derivation methodologies for groundwater standards used by the European Commission and 27 member states and compared their methods for determining threshold values. The European Commission presented to their member states groundwater standards for two substances and a list of required substances for derivation of threshold values along with the member states. Interestingly, they first considered national background levels and then considered other criteria for water protection, such as drinking water standards, environmental quality standards, and irrigation standards. We suggest that Korean background levels in groundwater should be included in the methodology for establishing groundwater quality standards. These results may be useful in developing a systematic methodology for establishing Korean groundwater quality standards.

A Service Protection Scheme based on non-CAS for Mobile IPTV Service (Mobile IPTV 서비스 환경을 위한 non-CAS 기반의 서비스 보호 기법)

  • Roh, Hyo-Sun;Jung, Sou-Hwan
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.21 no.2
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    • pp.27-35
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    • 2011
  • Due to the advancement of IPTV technologies, Mobile IPTV service is needed to be supported for service and content protection. CAS is generally used in the IPTV service to protect service and content. However, the CAS is not efficient in the Mobile IPTV. The CAS needs too much bandwidth for Service Key update to the each subscriber. Moreover, the CAS is increasing computation burden for the service key refreshment in the key management server when the subscriber frequently changes of the IPTV service group. To solve the problems, we used hierarchical key structure based on pre-shared key that is securely stored into smart card or USIM and do not use the EMM for Service Key update. As a result, the proposed scheme decreases computation burden at the key management server and wireless bandwidth burden in the Mobile IPTV service.