• Title/Summary/Keyword: All-IP

Search Result 617, Processing Time 0.033 seconds

Security Problem of National Major Facility's Parking Lot and its Improvement Method -Focused on Doonchi(Waterside) Parking Lot of National (국가중요시설의 주차장 보안의 문제점과 개선방안: 국회둔치주차장을 중심으로)

  • Lee, Sang-Hun;Lee, Sang-Yeol
    • Korean Security Journal
    • /
    • no.50
    • /
    • pp.61-87
    • /
    • 2017
  • National Assembly is a constitutional institution that is required to first consult the will of the people and it should do its effort continuously so that security of citizens using parking lot would be enhanced at the same time while improving parking service in order to increase customer satisfaction of the people. Under this recognition, in this study, Doonchi parking lot of National Assembly under consigned management was first reviewed in a perspective of criminal prevention through environmental design(CPTED) and particularly, fence installation and reinforcement work for securing 'territoriality' and operation of all round shooting camera and installation of No-trespassing warning board at entrance were suggested. Second, it was recommended to change independent control system in which CCTV security system of National Assembly Doonchi parking lot is operated separately from National Assembly safety situation room and integrate it with National Assembly safety situation room(revised to double safety system) and performance of CCTV camera was made to be increased to over 2m. In addition, video recording mode was converted to NVR mode for application to IP camera in the future and in order to avoid dead zone of security monitoring area and based on site inspection result, addition 3 places of newly installing CCTV were indicated. Third, it was recommended to introduce parking fare billing and management system through unmanned equipment in parking lot management and operation.(specialized management of professional parking service provider was reviewed). By doing so, risk of cash handling by charging personnel was removed by reducing current 7 working personnel to 3 and particularly, by converting parking lot management mode being operated temporarily from 9 A.M. to 9 P.M. at present to 24 hours operation mode and providing more specialized parking service, citizens visiting National Assembly were provided with convenience and image of National Assembly was also enhanced. This study was carried out in parallel with various literature and case studies, including data from the Office of the Defense Protection in the National Assembly.

  • PDF

A New Secure Multicast Protocol in Micro-Mobility Environments using Secure Group Key (마이크로 모빌리티 환경에서 보안 그룹키를 이용한 안전한 멀티캐스트 프로토콜)

  • Kang, Ho-Seok;Shim, Young-Chul
    • The KIPS Transactions:PartC
    • /
    • v.15C no.6
    • /
    • pp.573-586
    • /
    • 2008
  • The improved performance and miniaturization of computer and the improvement of wireless communication technology have enabled the emergence of many high quality services. Among them multicast services are receiving much attention and their usage is increasing due to the increase of Internet multimedia services such as video conference, multimedia stream, internet TV, etc. Security plays an important role in mobile multicast services. In this paper, we proposed a secure multicast protocol for a hierarchical micro-mobility environment. The proposed secure multicast protocol provides security services such as authentication, access control, confidentiality and integrity using mechanisms including symmetric/asymmetric key crypto-algorithms and capabilities. To provide forward/backward secrecy and scalability, we used sub-group keys based on the hierarchical micro-mobility environment. With this security services, it is possible to guard against all kinds of security attacks performed by illegal mobile nodes. Attacks executed by internal nodes can be thwarted except those attacks which delete packet or cause network resources to be wasted. We used simulator to measure the performance of proposed protocol. As a result, the simulation showed that effect of these security mechanisms on the multicast protocol was not too high.

Lazy Garbage Collection of Coordinated Checkpointing Protocol for Avoiding Sympathetic Rollback (동기적 검사점 기법에서 불필요한 복귀를 회피하기 위한 쓰레기 처리 기법)

  • Chung, Kwang-Sik;Yu, Heon-Chang;Lee, Won-Gyu;Lee, Seong-Hoon;Hwang, Chong-Sun
    • Journal of KIISE:Computer Systems and Theory
    • /
    • v.29 no.6
    • /
    • pp.331-339
    • /
    • 2002
  • This paper presents a garbage collection protocol for checkpoints and message logs which are staved on the stable storage or volatile storage for fault tolerancy. The previous works of garbage collections in coordinated checkpointing protocol delete all the checkpoints except for the last checkpoints on earth processes. But implemented in top of reliable communication protocol like as TCP/IP, rollback recovery protocol based on only last checkpoints makes sympathetic rollback. We show that the old checkpoints or message logs except for the last checkpoints have to be preserved in order to replay the lost message. And we define the conditions for garbage collection of checkpoints and message logs for lost messages and present the garbage collection algorithm for checkpoints and message logs in coordinated checkpointing protocol. Since the proposed algorithm uses process information for lost message piggybacked with messages, the additional messages for garbage collection is not required The proposed garbage collection algorithm makes 'the lazy garbage collectioneffect', because relying on the piggybacked checked checkpoint information in send/receive message. But 'the lazy garbage collection effect'does not break the consistency of the whole systems.

A Bit-Map Trie for the High-Speed Longest Prefix Search of IP Addresses (고속의 최장 IP 주소 프리픽스 검색을 위한 비트-맵 트라이)

  • 오승현;안종석
    • Journal of KIISE:Information Networking
    • /
    • v.30 no.2
    • /
    • pp.282-292
    • /
    • 2003
  • This paper proposes an efficient data structure for forwarding IPv4 and IPv6 packets at the gigabit speed in backbone routers. The LPM(Longest Prefix Matching) search becomes a bottleneck of routers' performance since the LPM complexity grows in proportion to the forwarding table size and the address length. To speed up the forwarding process, this paper introduces a data structure named BMT(Bit-Map Tie) to minimize the frequent main memory accesses. All the necessary search computations in BMT are done over a small index table stored at cache. To build the small index table from the tie representation of the forwarding table, BMT represents a link pointer to the child node and a node pointer to the corresponding entry in the forwarding table with one bit respectively. To improve the poor performance of the conventional tries when their height becomes higher due to the increase of the address length, BMT adopts a binary search algorithm for determining the appropriate level of tries to start. The simulation experiments show that BMT compacts the IPv4 backbone routers' forwarding table into a small one less than 512-kbyte and achieves the average speed of 250ns/packet on Pentium II processors, which is almost the same performance as the fastest conventional lookup algorithms.

A new algorithm for SIP parameter estimation from multi-frequency IP data: preliminary results (다중 주파수 IP 자료를 이용한 SIP 변수 추정)

  • Son, Jeong-Sul;Kim, Jung-Ho;Yi, Myeong-Jong
    • Geophysics and Geophysical Exploration
    • /
    • v.10 no.1
    • /
    • pp.60-68
    • /
    • 2007
  • Conventional analysis of spectral induced polarization (SIP) data consists of measuring impedances over a range of frequencies, followed by spectral analysis to estimate spectral parameters. For the quantitative and accurate estimation of subsurface SIP parameter distribution, however, a sophisticated and stable inversion technique is required. In this study, we have developed a two-step inversion approach to obtain the two-dimensional distribution of SIP parameters. In the first inversion step, all the SIP data measured over a range of frequencies are simultaneously inverted, adopting cross regularisation of model complex resistivities at each frequency. The cross regularisation makes it possible to enhance the noise characteristics of the inversion by imposing a strong assumption, that complex resistivities should show similar characteristics over a range of frequencies. In numerical experiments, we could verify that our inversion approach successfully reduced inversion artefacts. As a second step, we have also developed an inversion algorithm to obtain SIP parameters based on the Cole-Cole model, in which frequency-dependent complex resistivities from the first step are inverted to obtain a two-dimensional distribution of SIP parameters. In numerical tests, the SIP parameter images showed a fairly good match with the exact model, which suggests that SIP imaging can provide a very useful subsurface image to complement resistivity.

Effects of Follicle Stimulating Hormone on ${\gamma}$-Ray Irradiated Immature Mouse Ovarian Follicles (난포성숙호르몬이 감마선 조사된 미성숙 생쥐 난포에 미치는 영향)

  • Kim, Jin-Kyu;Lee, Chang-Joo;Lee, Young-Keun;Song, Kang-Won;Yoon, Yong-Dal
    • Journal of Radiation Protection and Research
    • /
    • v.23 no.2
    • /
    • pp.89-96
    • /
    • 1998
  • To assess the radioprotective effects of follicle stimulating hormone (FSH) on ovarian follicles, 3 week-old female mice were irradiated with 8.33 Gy of ${\gamma}$-ray (group R) and followed by 5 IU ip-injection of FSH (group RF). For control groups, 5 IU of saline (group C) or 5 IU of FSH (group F) was ip-injected. Ovaries were collected 0h, 6h, 12h, 14, 2d, 4d, and 8d after irradiation or saline/FSH injection, and followed by fixation in neutral buffered formalin for routine histochemistry. Immunohistochemistry was used to assess the status of follicles and DNA fragmentation was analyzed by agarose gel electrophoresis for total DNA. Staining specific for apoptotic follicles showed high intensity at 6h and 12h in group R and RF On the other hand, staining specific for proliferating follicles showed noticeably high intensity at 8d in group R and Rf. DNA fragmentation of 185bp increased with time in all experimental groups. Especially 370bp appeared at 6h in group R, then disappeared after 1d. In case of group RF, it appeared at 12h and disappeared after 1d. From the above results, the irradiated antral follicles become completely disappeared from 4d to 8d, and then new follicles started to grow again at 8d. FSH had delaying or suppressing effects on follicular atresia after irradiation. In addition, it became clear that radiation-induced follicular atresia was mediated by granulosa cell apoptosis.

  • PDF

Factors Influencing Protoplast Isolation and Culture in Three Capsicum Species (세 가지 고추속 식물의 원형질체 분리 및 배양에 미치는 요인)

  • 임학태;염옥희;전익조;조미애;양승균
    • Korean Journal of Plant Tissue Culture
    • /
    • v.28 no.3
    • /
    • pp.141-146
    • /
    • 2001
  • Protoplasts were isolated from cotyledons, hypocotyls, and mesophyll tissues of three species of Capsicum species (C. anuumm, C. bacatuum, and C. chacoense). Combination of Cellulysin (1%) and Macero-zyme (0.25%) in 0.65 M sorbitol was found to be the most effective for the digestion of cell wall, regardless of the Capsicum species. Antioxidant MES (2-[N-Morpholino]ethanesulfonic acid) in the enzyme solution helped protoplasts overcome browning. After 5 days of initial culture, Cell division occurred in modified K8p medium containing 1~5 mg/L zeatin, 0.5 mg/L IAA, 0.1~0.5 mg/L TDZ, and 1 mg/L 2,4-D under continuous dark condition at $25^{\circ}C$. Semi-solid agarose culture method was more effective than liquid culture, and it also protected the cells from browning caused by polyphenolic compound released during protoplast culture. A total of 4000 calli were obtained from protoplast culture of different capsicum species. All of these calli were transferred to the 100 combinations of regeneration media using various plant growth regulators; TDZ, IAA, 2ip, BAP, NAA, and zeatin. These calli derived from protoplast of three species of capsicum were, however, not differentiated into shoots.

  • PDF

A Design & Implementation of Remote Access Function for A Multimedia Database of The Tele-medical System Based on ATM/B-ISDN (ATM/B-ISDN 기반의 원격 의료정보 시스템을 위한 멀티미디어 데이터베이스 원격 접속기능 설계 및 구현)

  • 김호철;김영탁
    • Journal of Korea Multimedia Society
    • /
    • v.1 no.1
    • /
    • pp.98-108
    • /
    • 1998
  • In the multimedia tele-medical system the medical informations are stored and managed in multimedia database. Also, multimedia DBMS is essential in order to manage large scale medical informations, and the remote access function is necessary for the distributed processing at all around the hospital. For the multimedia tele-medical information that is composed of image/picture, data, video, and audio, a high-speed telecommunication network is necessary that can provide separated connections for each medical information type with different QoS. The commercial DBMSs are based on the TCP/IP socket API(Application Programming Interface) that does not provide multiple QoS. Also, each commercial DBMS has its own API that is incompatible with other DBMS. In this paper, we propose a multimedia DBMS agent for the remote access of the multimedia database in the tele-medical system. The proposed multimedia DBMS agent is based on the ATM API that can provide high-speed data transfer capability and multiple QoS connections. Also, the proposed multimedia DBMS agent is independent of the commercial DBMS. We explain the functional architecture of the multimedia DBMS agent, implementation technology on the ATM network environment, and the result of performance analysis.

  • PDF

Structures and some Properties of the Antimicrobial Compounds in the Red Alga, Symphyocladia latiuscula (참보라색우무에서 추출한 항균물질의 구조 및 특성)

  • LIM Chi-Won;LEE Jong-Soo;CHO Young-Je
    • Korean Journal of Fisheries and Aquatic Sciences
    • /
    • v.33 no.4
    • /
    • pp.280-287
    • /
    • 2000
  • Three antimicrobial compounds (SL-l, SL-2 and SL-3) were isolated and identified from the marine red alga, Symphyocladia latiuscula. In addition, their biological functionalities such as cytotoxicity and desmutagenic activity were investigated. From the cryophyllized S. JatiuscuJa, SL-l, SL-2 and SL-3 were purified by solvent extractions and HPLC.SL-2 was crystallized in benzene-diethyl ether solvent. On the EI-MS spectra, it was found that they had three bromines in their structure which showed typical signal strength ratios at $M^+, [M+2]^+, [M+4]^+, [M+6]^+ (13: 38: 37: 12)$. $SL-l$ was identified as 2,3,6-tribromo-4,5-dihydroxybenzyl alcohol ($C_8H_7Br_3O_3, MW=374$) by NMR and MS spectra. SL-2 was assigned as 2,3,6-tribromo-4,5-dihydroxybenzyl methyl ether ($C_8H_7Br_3O_3, MW=388$) and confirmed by X-ray crystallographic analysis. SL-3 was presumed as an isomer of SL-2. Methanol extract of the S. latiuscula showed antimicrobial activities against all strains tested (bacteria, 15 strains; yeasts, 17 strains; fungi, 4 strains), much or less. The strongest inhibition activity of the methanol extract was to the Vibrio mimicus ($50 {\mu}g/ml$) and V. vulnificus ($50 {\mu}g/ml$). The mice injected intraperitoneally with 3 mg of SL-l and 5 mg of 5L-2 showed no acute toxicity response. SL-2 showed higher desmutagenic activity than SL-l against PhIP and MeIQx.

  • PDF

Design and Implementation of user centric pavilion information guide system based on commercial mobile device (모바일 기기 기반 사용자 중심형 전시관 정보 안내 시스템의 설계 및 구현)

  • Yun Hyun-Joo;Bu So-Young;Choi Yoo-Joo
    • Journal of the Korea Society of Computer and Information
    • /
    • v.11 no.2 s.40
    • /
    • pp.187-199
    • /
    • 2006
  • This paper proposes the design of user centric pavilion information guide system based on mobile device such as PDA. which is composed of system interface factors as user wants. The suggested information guide system is convenient for user carrying because it is based on PDA mobile device and the used liquid browser system makes all data information displayed on a small screen in contrast with the other browser system. Indeed, factors of system interface can be re-composed by user interaction. And this system can effectively provide the detail information about the exhibited objects as various media data such as text, image, voice, music, video etc. The proposed system is made up of media database server. mobile system control server and mobile system interface which accepts user interaction and displays the information. Each system is networked based on TCP/IP and uses XML (extensible Markup Language) and JAVA 2 micro edition to be able to update data. This feature enhances a wide use to be able to load this system on the any mobile device.

  • PDF