• Title/Summary/Keyword: NAT2

Search Result 2,636, Processing Time 0.032 seconds

A Study on Relay Server Topology inside NAT for Pure P2P (순수 P2P를 위한 NAT 내부의 Relay Server 토폴로지에 관한 연구)

  • Shon, Hyung-Doh;Kang, Seung-Chan
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.12 no.3
    • /
    • pp.575-580
    • /
    • 2008
  • Lately, the use of the NAT has become unavoidable with the increase of P2P traffic along with the exhaustion of IPv4 IP address. Due to NAT properties, NAT's internal host can only be connected through a relay method using the outside server. Accordingly, there is a lot of resource exhaustion of the relay server on the NAT exterior and network traffic increases. This essay proposes a topology that can form sessions to the NAT interior from the NAT exterior and that will decrease network traffic by placing NAT exterior relay servers in the NAT interior.

Relationships between Dapsone Metabolic Activity and Polymorphism of Arylamine N-acetyltransferase 2 in the F2 Hybrid Rats (잡종 2세대(Fischer 계: Wistar-Kyoto 계) 흰쥐에서 Arylamine N-acetyltransferase 2의 다형성과 Dapsone의 대사능과의 연관성에 대한 연구)

  • 신인철;강주섭;고현철;이창호;안동춘;백두진;심성한;조율희
    • Biomolecules & Therapeutics
    • /
    • v.10 no.3
    • /
    • pp.193-199
    • /
    • 2002
  • The arylamine N-acetyltransferases (NATs) are a family of enzymes that N-acetylate mylhydrazines and arylamines through transfer of an acetyl group from acetyl coenzyme A. This activity was found to vary among individuals as a Mendalian trait and the basis of the genetic differences in human NAT activity is one of the best of the genetic studied examples of pharmacogenetic variation. The classical N-acetylation polymorphism is regulated at the NAT2 locus, which segregates individuals into rapid, intermediate, and slow acetylator phenotypes. In this study, the relationship between NAT2 activity phenotype using HPLC:UV assay for the determination of dapsone and monoacetyldapsone in plasma and NAT2 genotype by PCR-RFLP (polymerase chain reaction-restriction fragment length polymorphism) was investigated in the F2 hybrid (Fischer 344 vs Wistar-Kyoto) rats. Three Common mutant alleles at the NAT2 gene locus have been identified in the F2 generation progeny of Fischer 344 rats as raid acetylator and Wistar-Kyoto rats as slow acetylator segregated into three modes (low, intermediates, and high) with simple Mendelian inheritance. The metabolic activity of NAT2 of the intermediate and rapid acetylators is significant1y greater than slow acetylator, but the metabolic activity of rapid acetylator is not significantly different from Intermediate type. Therefore, we could observe that complete trimodal NAT2 genotypic alleles and incomplete trimodal NAT2 metabolic phenotypic distribution in tile F2 hybrid rats. These observations suggest that the relationships between NAT2 genotype and metabolic phenotype exists and F2 hybrid (Fischer 344: Wistar-Kyoto) animal models about NAT2 polymorphism might be applied in the toxicity and pharmacogenetic studies of arylamine drugs and carcinogens.

Association of CYP2E1 and NAT2 Polymorphisms with Lung Cancer Susceptibility among Mongolian and Han Populations in the Inner Mongolian Region

  • Zhang, Jing-Wen;Yu, Wan-Jia;Sheng, Xiao-Min;Chang, Fu-Hou;Bai, Tu-Ya;Lv, Xiao-Li;Wang, Guang;Liu, Su-Zhen
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.15 no.21
    • /
    • pp.9203-9210
    • /
    • 2014
  • Purpose: To explore associations of CYP2E1 and NAT2 polymorphisms with lung cancer susceptibility among Mongolian and Han populations in the Inner Mongolian region. Materials and Methods: CYP2E1 and NAT2 polymorphisms were detected by PCR-RFLP in 930 lung cancer patients and 1000 controls. Results: (1) Disequilibrium of the distribution of NAT2 polymorphism was found in lung cancer patients among Han and Mongolian populations (p=0.031). (2) Lung cancer risk was higher in individuals with c1, D allele of CYP2E1 RsaI/PstI, DraI polymorphisms and slow acetylation of NAT2 (c1 compared with c2, OR=1.382, 95%CI: 1.178-1.587, p=0.003; D compared with C, OR=1.241, 95%CI: 1.053-1.419, P<0.001; slow acetylation compared with rapid acetylation, OR=1.359, 95%CI:1.042-1.768, p=0.056) (3) Compared with c2/c2 and rapid acetylation, c1/c1 together with slow acetylation synergetically increased risk of lung cancer 2.83 fold. (4) Smokers with CYP2E1 c1/c1, DD, and NAT2 slow acetylation have 2.365, 1.916, 1.841 fold lung cancer risk than others with c2/c2, CC and NAT2 rapid acetylation, respectively. (5) Han smokers with NAT2 slow acetylation have 1.974 fold lung cancer risk than others with rapid acetylation. Conclusions: Disequilibrium distribution of NAT2 polymorphism was found in lung cancer patients among Han and Mongolian populations. Besides, Han smokers with NAT2 slow acetylation may have higher lung cancer risk compared with rapid acetylation couterparts. CYP2E1 c1/c1, DD and NAT2 slow acetylation, especially combined with smoking, contributes to the development of lung cancer. CYP2E1 c1/c1 or DD genotype and NAT2 slow acetylation have strong synergistic action in increasing lung cancer risk.

ESTIMATION OF ERRORS IN INS WITH GPS

  • Chang, Yu-Shin;Kim, Jae-Sik;Ha, S-K;Kim, C-S;Kim, E-J;Hong, S-P;Lee, M-H
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2002.10a
    • /
    • pp.53.1-53
    • /
    • 2002
  • $\textbullet$ Contents 1. Introduction $\textbullet$ Contents 2. Error Models of Navigation $\textbullet$ Contents 3. Observablity Properties of GPS/INS $\textbullet$ Contents 4. Measurement System for INS Error Estimation $\textbullet$ Contents 5. Numerical Simulation Results $\textbullet$ Contents 6. Conclusions

  • PDF

Future 2nd generation face prediction web service using StyleGAN (StyleGAN을 이용한 미래 2세대 얼굴 예측 웹 서비스)

  • Hwang Kim;Min-Jeong Kim;JI-Hyeon Lee;Jin-Ah Jung;Dong-Uk Kim;Ho-Young Kwak
    • Proceedings of the Korean Society of Computer Information Conference
    • /
    • 2024.01a
    • /
    • pp.329-330
    • /
    • 2024
  • 최근 생성형 AI에 대한 수요가 상승하고 있으며, MZ세대의 자기애 성향으로 자신의 얼굴을 활용한 미디어 콘텐츠에 대한 호기심이 높아지고 있다. 이에 따라 본 논문에서는 MZ세대의 창의성과 미디어 소비를 고취시키기 위해, StyleGAN 기술을 중심으로 자신과 닮은 2세의 가상 모습을 생성하는 웹 서비스를 설계하고 구현하였다.

  • PDF