• The KIPS Transactions:PartC
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• v.10C no.6
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• pp.799-808
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• 2003

Existing security solutions such as Firewell and IDS (Intrusion Detection System) have a trouble in getting accurate detection rate about new attack and can not block interior attack. That is, existing securuty solutions have various shortcomings. Shortcomings of these security solutions can be supplemented with mechanism which guarantees an availability of systems. The mechanism which guarantees the survivability of node is various, we approachintrusion telerance using real time response mechanism. The monitoring code monitors related resources of system for survivability of vulnerable systm continuously. When realted resources exceed threshold, monitoring and response code is deployed to run. These mechanism guarantees the availability of system. We propose control mathod about resource monitoring. The monitoring code operates with this method. The response code may be resident in active node for availability or execute a job when a request is occurred. We suggest the node survivability mechanism that integrates the intrusion tolerance mechanism that complements the problems of existing security solutions. The mechanism takes asvantage of the automated service distribution supported by Active Network infrastructure instead of passive solutions. The mechanism takes advantage of the automated service distribution supported by Active Network infrastructure instead of passive system reconfiguration and patch.

• Journal of Embryo Transfer
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• v.16 no.2
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• pp.117-125
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• 2001

Vitrification of oocytes has been applied recently fur pigs, but remains elusive. The purpose of this study is to investigate the effects of vitrification in open pulled straws (OPS) on in vitro survival of porcine oocytes. When immature follicular oocytes frozen-thawed were cultured for in vitro maturation, maturation rates to metaphase-II stage were higher in oocytes with (25%) than without (15%) cumulus cells. After In vitro fertilization of oocytes frozen-thawed, the maturation rates were also significantly (P<0.05) higher in oocytes with (41%) that than without (17%) cumulus cells. However, the penetration rates were higher in oocytes without (19%) that than with (9%) cumulus. In another experiment, porcine oocytes matured in vitro were frozen and thawed for in vitro fertilization. The penetration rates were higher than in oocytes without (35%) that than with (26%) cumulus cells. However, the proportions of oocytes dead after in vitro fertilization were significantly (P<0.05) higher in oocytes with that than without cumulus cells. On the other hand, the rates of penetration and dead oocytes at 6 h after in vitro fertilization were not significant differences between oocytes with and without cumulus cells. However, the proportions of dead oocytes with (18%) and without (16%) cumulus cells were higher than in oocytes of control group (0%). These finding indicated the possible broader application for OPS, as they demonstrated that the maturation and fertilization in vitro by frozen-thawed oocytes may be accompained by cumulus cells and culture periods according to the requirements of the survival ability after freezing of mature and immature oocytes in pigs.

• Korean Journal of Animal Reproduction
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• v.24 no.3
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• pp.255-262
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• 2000

The aim of this work was to study the effects of ascorbic acid (Asc) and/or ferrous sulfate (Fe$^{2+}$) and spernatozoa preincubation on the in vitro fertilization in porcine. Porcine follicular oocytes matured in culture were inseminated with frozen-thawed boar spermatozoa preincubated for 0, 1, 2, 3, 4 and 5h. The penetration rates (37~51%) were not significantly different between durations of spermatozoa preincubation in medium with 0.1 mM Asc. The addition of 1.0 mM Fe$^{2+}$ during spermatozoa preincubation were not significantly affecting the penetration rates (41~56%). When spermatozoa were preincubated with Asc and Fe$^{2+}$, the penetration rates had a tendency to increase with time of spermatozoa preincubation, and were significantly (P<0.05) higher in spermatozoa preincubated with that than without Asc and Fe$^{2+}$ for 5 h. On the other hand, when spermatozoa were preincubated in fertilization medium without Asc and/or Fe$^{2+}$, the penetration rates were significantly (P<0.05) higher in medium with Fe$^{2+}$ than with Asc or Asc and Fe$^{2+}$ for in vitro fertilization. The rate of polyspermy in penetrated oocytes in medium with Asc and Fe$^{2+}$ decreased with the period of spermatozoa preincubation. Despite different culture conditions for spermatozoa preincubation, no differences were observed in polyspermy rates in the presence of Asc and/or Fe$^{2+}$ These results indicate the advantage of preincubating spermatozoa with Asc and Fe$^{2+}$ and an addition of Fe$^{2+}$ during in vitro fertilization with spermatozoa preincubated maintain penetration potential without increased polyspermy rates on in vitro fertilization in porcine oocytes.on in porcine oocytes.

• Korean journal of applied entomology
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• v.59 no.2
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• pp.117-127
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• 2020

We monitored on the hitchhiker insect pests from a total of 112 foreign vessels entering into Korea during 109 days from 1. Jun. to 17. Sep. in 2018. As the results, a total of 336 samples of the hitchhiker insects were collected using simply collecting method by hands, one of interception method and identified as 159 species of 47 families under nine orders on the basis of integrative species identification. Among them, 14 species of nine families under three orders were detected as undistributed species in South Korea. We reported on the 14 undistributed species in South Korea with the data sheets for the risk assessments on invasive or invasive likelihood species. Also, we suggested and used the term 'not-distributed species' for avoiding confusion with 'unrecorded species', 'unreported species', or 'new reported species'.

• Korean journal of applied entomology
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• v.60 no.3
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• pp.269-276
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• 2021

During 15 months from 13. Jul. 2018 to 29. Oct. 2019, we monitored on the hitchhiker insect pests from a total of 306 foreign vessels entering into Korea. As the results, a total of 805 samples of the hitchhiker insects were collected using simply collecting method by hands and identified as 379 species of 78 families under 12 orders on the basis of integrative species identification. Among them, 42 species (67 individuals) of 21 families under seven orders were detected as not-distributed species in South Korea. Of the 42 not-distributed species, seven species were multiply detected in 2018 and 2019, and two species, Erthesina fullo (Pentatomidae, Hemiptera) and Tessaratoma papilosa (Tessaratomidae, Hemiptera) were discovered as regulated insect pest. Therefore, we reported on the 42 not-distributed species in South Korea with the data sheets for the establishment of a monitoring plan on the not-distributed species and the risk assessments on invasive or invasive likelihood species.

• The KIPS Transactions:PartC
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• v.11C no.7 s.96
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• pp.993-998
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• 2004

As Worm Virus & DDoS attack appeares, the targets and damage of infringement accidents are extending from specific system or services to paralysis of the network itself. These attacks are expending very frequently and strongly, and ISP who will be used as the path of these attacks will face serious damages. But compare to Worm Virus & DDoS attack that generally occures in many Systems at one time with it's fast propagation velocity, network dimensional opposition is slow and disable to deal with the whole appearance for it is operated manually by the network manager. Therefore, this treatise present devices how to detect Worm Virus & DDoS attack's outbreak and the attacker(attacker IP adderss) automatically.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.123-126
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• 2013

Access control system, when operating the infrastructure manager and the permissions for the user to clearly define the terminology that is. Various IT incidents still happening frequently occur, and these incidents in order to prevent the situation of access control is needed. In this study, the Copy command by hackers hacking incidents, such as walking dangerous limits for instructions attacks in advance, and also the internal administrator accident accidental limit command to walk off the risk in advance and even if the incident occurred access to the command history log and post it as evidence through the analysis techniques that can be utilized are described.

• Clinical and Experimental Reproductive Medicine
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• v.25 no.3
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• pp.315-322
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• 1998

The objective of this study was to test the effect of catalase on penetration in vitro by spermatozoa preincubated with xanthine and/or xanthine oxidase. The penetration rates were, significantly (p<0.05) higher in spermatozoa preincubated without (66 and 38%) than with (40 and 15%) catalase for 0 and 30 min. When spermatozoa were preincubated and inseminated in medium with xanthine, the penetration rates were significantly higher (p<0.05) in medium with (68, 70 and 49% for 0, 30 and 60 min) than without (33, 41 and 19% for 0, 30 and 60 min) catalase. However, in oocytes were' inseminated with spermatozoa pre incubated with or without catalase in the presence of xanthine oxidase, no decrease in penetrations rates were observed for up to 60 min of preincubation. In another experiment, the penetration rates were significantly (p<0.00l) higher in medium with (75, 55 and 52%) than without (14, 4 and 8%) catalase when oocytes were inseminated with spermatozoa preincubated for 0, 30 and 60 min in the presence of xanthine plus xanthine oxidase. On the other hand, The rate of polyspermy in oocytes penetrated in medium without catalase in the presence of xanthine or xanthine plus xanthine oxidase decreased with time of spermatozoa preincubation. However, no differences were observed in polyspermy rates in the medium with xanthine oxidase alone despite presence of catalase. These results indicate the advantages of spermatozoa pre incubated with xanthine plus xanthine oxidase in the presence of catalase to increase penetration potential and with suppressed polyspermy in porcine.

• Review of KIISC
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• v.18 no.4
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• pp.54-60
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• 2008

바이오인식기술을 이용하는 개인인증을 수행하는 바이오인식 시스템으로 구성되어 물리적 접근제어, 인터넷 접근제어, 전자여권 등 다양한 장소에서 신원확인의 수단으로 이용되어지고 있다. 바이오인식 시스템은 다양한 장소에서 사용되므로, 바이오정보획득, 처리, 정합 등을 수행하는 시스템이 분리되어 구축된다. 이때 각 시스템 및 시스템에서 사용/전달되어지는 정보의 변환, 도용, 훼손에 대한 보호 및 시스템에서 비인가자의 불법적인 원격침입 가능성이 발생한다. 이와같은 공격의 취약성을 방지하기 위하여 텔레바이오메트릭 시스템에 대한 보호절차를 구성하였다. 개인인증을 위하여 생체정보를 수집하거나, 이용하는데 있어서 준수하여야 하는 바이오정보보호에 대한 중요사항을 제시하고, 안전한 이용환경을 제공하기 위하여 네트워크상에서 시스템이 수행될 때 발생하는 공격 취약점을 정의하였으며, 이를 보호하기 위한 가이드라인을 구성하였다. 텔레바이오인식 시스템보호 절차에서 제시하는 가이드라인은 바이오정보 보호 정책 개발방법, 위험분석, 바이오인식 시스템 운영 및 기술 개발시에 활용할수 있다. 본고는 현재 ITU-T SG17 Q.8(Telebiometrics)에서 KISA가 추진하여 년내에 X.tpp로 제정이 예상되는 국제표준을 상세히 설명하고 있으며, 이는 곧 바이오인식 시스템을 이용한 작은규모의 물리적 접근 제어 시스템으로부터 국가적 규모의 바이오인증 시스템까지 응용가능한 텔레바이오인식 시스템 전반에 적극 활용할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.441-444
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• 2016

Peace on the Korean Peninsula is threatened by physical aggressions and cyber terrors such as nuclear tests, missile launchings, senior government officials' smart phone hackings and DDos attacks to banking systems. Cyber attacks such as vulnerability for the hackings, malware distributions are generally defended by passive defense through the detecting signs of first invasion and attack, data analysis, adding library and updating vaccine programs. In this paper the concept of security program based on Google TensorFlow machine learning ability to perform adding libraries and solving security vulnerabilities by itself is researched and proposed.