이동 애드 혹 네트워크에서 QoS를 지원하는 AODV 라우팅 프로토콜

吳世德,趙榮泰,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance victor routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end point is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average date reception rate. At that time, we used evaluation parameters such as node's mobility -stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.3% for 0 mobility-stop second case and 4.7% for 300 mobility-stop second case.

어린이에서 함치성 낭과 연관된 매복 소구치와 대구치의 치료

신차욱,김영재,김정욱,장기택,이상훈,김종철,한세현 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.4

치아 매복은 어린이 환자 진료시에 자주 관찰되는 맹출 장애이다. 어린 환자에서 매복된 치아가 존재하는 경우,함치성 낭과 연관이 있을 가능성이 높다. 함치성 낭은 제3대구치를 제외하고는 상악 견치,하악 소구치 부위에서 가장 호발하며,점진적인 증식으로 악골이 팽윤되어 안모를 변화시키며,주위 악골의 파괴와 치근의 흡수를 야기하거나 침범된 치아의 변위를 유발할 수 있으므로,조기 진단과 적절한 치료가 무엇보다도 중요하다. 함치성 낭과 연관된 치아가 과잉치나 지치라면,치아의 발거를 포함한 완전한 낭종 적출술이 적절한 치료라 할 수 있지만,그렇지 않은 경우에는 환자의 심리적,정선적 외상을 예방하기 위해 원인 치아의 보존이 고려되어야 할 것이다. 이뿐만 아니라,치아의 변위 정도,골 파괴 정도,치근의 성숙도,주위 치아와의 관계,환자의 교합과 구강 악안면 영역의 성장 양상 등도 같이 고려되어야 할 것으로 생각된다. 본 증례에서는 위와 같은 사항들을 고려하여,함치성 낭과 연관된 매복 소구치와 대구치블 낭종 적출술 후 공간 유지,외과적 수술과 교정적 견인,외과작 발거 후 교정적 배열 등의 방법을 통해 양호한 치료 결과를 얻었기에 보고하는 바이다. Tooth impaction is a frequently observed eruption anomaly in pediatric dental practice. Young patients with impacted or unerupted teeth have more prediction for dentigerous cyst formation. Dentigerous cyst presents radiographic features. unilocular or multilocular radioluscency. Cysts occur most frequently in the premolar region except third molar. Dentigerous cysts can grow to a considerable size, and large cysts may be associated with a painless expansion of the bone in the involved area. Extensive lesions may result in facial asymmetry, osseous destruction, root resorption of proximal teeth and displacement of associated tooth. The nature of the causative tooth influences the type of surgical treatrnent required for the dentigerous cyst. If the cyst is associated with a supernumerary or wisdom tooth. complete enucleation of the cyst along with extraction of tooth may be the first treatment choice. Otherwise. preservation of the associated teeth should be considered to prevent a young patient from psychological and mental trauma because of the loss of tooth. We should consider the degree of tooth displacement. osseous destruction and growth pattern of oromaxillofacial area when planning treatment. Thus a proper and logical treatment planning can help a proper growth and development of oromaxillofacial area and can save the patient from a psychological and mental trauma. This report describes 4 cases of the management of impacted premolars and molars associated with dentigerous cysts in children.

GMAHN 환경에 적응하는 에러 복구기능을 이용한 AODV 라우팅 프로토콜

정찬혁,오세덕,배진승,이기원,장양근,이광배,김현욱,유충렬,하재승 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-

Mobile nodes in ad hoc mobile networks typically communicate over wireless channels and are capable of movement. These are networks that support multihop communication and can be formed on a temporary basis. This paper proposes a solution that allows mobile nodes to access the wired Internet and to roam from base station to base station. And we also develop the efficient method that adapts in Global MANET which can be changed over time. It is observed that we can reduce not only error detection time but also network load, thus increasing the data reception rate in Global MANET Environment.

MANET 라우팅 프로토콜 QoS 지원서비스의 성능평가에 관한 연구

鄭燦赫,金鉉郁,李光培,姜景仁,朴京培,劉忠烈,吳世德,裵振勝,趙榮泰 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we evaluated two main QoS supporting routing protocol on wireless ad hoc network. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS support service between source and destination becoming a very important issue. Of all routing protocols, DSR and AODV are very important routing protocol in MANET. So we simulated DSR and AODV QoS Routing Protocol Through simulation evaluation tool NS(Network Simulation) based on various environments.

임베디드 시스템에서 Mobile IP 프로토콜 구현

宋東勳,裵振勝,鄭燦赫,吳世德,李基源,劉忠烈,河載承,李光培,金玄郁 명지대학교 산업기술연구소 2005 産業技術硏究所論文集 Vol.24 No.-

With rapid growth of the internet, need for the mobile communication networks is increasing. In this paper, we implement and test Mobile IP Protocol in Embedded System. Our Mobile IP-based testbed consisted of two sub-networks and each sub-network was configured to operate independently through use of router. To satisfy integrated wired/wireless network model established on the testbed design and show generality of the testbed, we implemented mobile nodes, home agent, foreign agent and router on the basis of Linux operating system. As the results of the evaluation, we confirmed that mobile nodes operated properly according to Mobile IP Protocol.

이동 애드 혹 네트워크에서의 환경적응형 QoS AODV 라우팅 프로토콜에 관한 연구

裵振勝,宋東勳,吳世德,鄭燦赫,金玄郁,李光培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance vector routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end points is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average data reception rate. At that time, we used evaluation parameters such as node's mobility-stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.293%, 15.914%, 17.238% for 300 mobility-stop second case and 4.809%, 4.264%, 2.956% for 300 mobility-stop second case.

초기 성공적인 심폐소생술후 혈청 Interleukin-6 농도의 발현양상

박규남,박승현,황두영,김형국,이환,최경호,이원재,정욱성,김학주,김세경 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4

Objective : To investgate patterns of serial serum interleukin-6(IL-6) concentrations after initial successful cardiopulmonary resuscitation, and to access differences in serum IL-6 concentrations in patients with Cerebral Performance Category(CPC, 1-2) and CPC(3-5) at the 5th day after cardiacpulmonary resuscitation(CPR). Methods : We studied prospectively 12 patients with spontaneous circulation after cardiopulmonary resuscitation. Venous blood samples were taken 2, 4, 12, 24, 48 and 72 hours after restoration of spontaneous circulation to measure serum IL-6 levels by the enzyme-linked immunosorbent assay. Results : Serum IL-6 concentrations in the severe neurolgically disabled group(CPC, 3-5) were significantly increased at 2, 24 and 48 hours after restoration of spontaneous circulation compared with the less neurolgically disabled group. Also, serum IL-6 concentrations in the severe neurolgic disabled group showed dual peak at 4 and 24 hours. Conclusion : Our study demonstrates significant increase of serum IL-6 in patients with CPC(3-5) after successful cardiopulmonary resuscitation and the significant correlation between early increase of serum IL-6 and poor neurologic outcome. It suggests that early increase of serum IL-6 can be used as a prognostic marker after successful cardiopulmonary resuscitation.

상수원 이용 호소의 산림유래 난분해성물질 거동평가

이혜리(Hyeri Lee),이상희(Sanghee Lee),조윤해(Yoonhae Cho),이준배(Junbae Lee),간종범(Jongbeom Khan),이세용(Seyong Lee),이보미(Bo-Mi Lee),김소희(Sohui Kim),허진(Jin Hur),신현상(Hyunsang Shin),이수형(Soohyung Lee),천세억(Se-Uk Cheon) 환경독성보건학회 2016 한국독성학회 심포지움 및 학술발표회 Vol.2016 No.6

Optical Charge Pumping Technique for Extracting Interface States of Nano-Scale SONOS Flash Memories

Lee Sunyeong,김대환,Choi Chang-Min,Jeon Ki-Chan,Kang Gu-Cheol,Kim Dong Myong,Kim Kwan-Young,Kim Se-Woon,Lee Jang-Uk,Lee Jong Duk,Park Jun-Hyun,박병국,Park So-Ra,Roh Kang-Seob,Seo Seung-Hwan,Shin Hyungcheol 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.III

The optical charge pumping (CP) technique is proposed as a simple and fast method for extracting the energy distribution of interface trap, $D_{it}$, of silicon-oxide-nitride-oxide-silicon (SONOS) flash memories. It is based on the optical response of a subthreshold slope of a SONOS memory cell transistor and is more effectively applicable to nano-scale emerging devices than the conventional CP technique, because no electrical pulse is required during extraction and because the current is measured not from the substrate, but from the drain contact. This means that a large gate current can be easily corrected by monitoring both the gate current and the drain current, no parasitic effect is caused by excluding the pulse measurement setup, and the extraction of $D_{it}$ in devices on silicon-on-insulator substrates is possible. The results applied to SONOS memories show that the generation rate of interface traps with program/erase cycles is higher in the NAND flash scheme rather than in the NOR flash scheme.

Association between Non-Alcoholic Fatty Liver Disease Incidence and Colorectal Cancer

( Se Hwa Kim ),( Haein Bak ),( Sungwon Jang ),( Ha Seok Lee ),( Chan Uk Lee ),( Young Sun Lee ),( Young Kul Jung ),( Ji Hoon Kim ),( Yeon Seok Seo ),( Hyung Joon Yim ),( Kwan Soo Byun ),( Minjin Lee ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1

Aims: Non-alcoholic fatty liver disease (NAFLD) is one of the most common chronic liver diseases(CLD) globally(prevalence of 25.2%). Recently, It is stipulated that NAFLD may be an independent risk factor for developing colorectal cancer(CRC). We analyzed the prevalence of NAFLD in patients with CRC and the effect of NAFLD on the prognosis of CRC. Methods: Total 293 patients with CRC were enrolled from March 2003 to April 2018. Patients who had other CLD including chronic viral hepatitis B/C, autoimmune hepatitis, and primary biliary cholangitis and significant alcohol abuse (more than 140 g/week in women and 210 g/week in men) were excluded. Hepatic steatosis was evaluated by non-enhanced computed tomography (CT) scan. We measured values of regions of interest (ROI) for 3 times in liver and spleen, respectively. We diagnosed NAFLD when the average ROI of liver 10 less than it of spleen. 123 healthy controls who took non-enhanced CT scan were also analyzed. Results: The median age was 65.0(interquartile range[IQR] 54.0-73.0 years), and median Body mass index(BMI) was 24.02 (IQR 21.4-26.1). The median BMI of CRC patients without NAFLD was 23.75(IQR 21.3-25.7), and CRC patients with NAFLD was 25.16(IQR 21.8-27.0). The prevalence of Hypertension was 49.8%(146/293) in CRC group, and 35.77%(4/123) in control group (P=0.009). The prevalence of Diabetes Mellitus was 32.08% (94/293) in CRC group, and 16.26%(20/123) in control group(P=0.001). The prevalence of NAFLD was significantly higher in CRC group(24.57%, 72/293) than in the healthy group. (13%, 16/123) (P=0.008). Overall survival did not showed significant difference between NAFLD group and non-NAFLD group (P=0.706 by log-rank test). Conclusions: The prevalence of NAFLD in patients with CRC is significantly higher than control group. But the overall survival didn’t show singnificant difference. Further studies are needed to specify the effect of NAFLD on CRC prognosis in terms of recurrence and progression.