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단일 플러딩 라우팅 알고리즘을 활용한 센서 네트워크의 시간 동기화 기법
신재혁,김영신,전중남,Shin, Jae-Hyuck,Kim, Young-Sin,Jeon, Joong-Nam 한국정보처리학회 2011 정보처리학회논문지 C : 정보통신,정보보안 Vol.18 No.1
일반적으로 센서 네트워크는 라우팅 트리를 구축한 후에 시간 동기화를 수행한다. 이로 인하여 시간 동기화가 늦어지고 교환하는 패킷이 증가하여 에너지를 많이 소모하는 문제를 유발한다. 본 논문에서는 한 번의 플러딩 과정으로 라우팅 트리를 구축하고 이와 동시에 시간 동기화를 수행하는 TSRA (Time Synchronization Routing Algorithm) 알고리즘을 제안한다. 라우팅 패킷에 패킷 수신 시간과 패킷 전송시간을 추가하여 두 노드간 시간 차이를 구하고, 시간 차이를 전송함으로써 노드들 간의 시간 동기화를 구현한다. 시뮬레이션에 의하여 제안하는 알고리즘은 기존의 동기화 알고리즘인 TPSN과 동등한 수준의 정확도를 보이면서 동기화 속도 및 에너지 소모 면에서 우수하다는 것을 입증하였다. Usually time synchronization is performed after routing tree is constructed. This thesis proposes a time synchronization algorithm combined with single-flooding routing tree construction algorithm in a single path. TSRA (Time Synchronization Routing Algorithm) uses routing packets to construct a routing tree. Two types of time information are added to the routing packet: one is the packet receiving time, and the other is the packet sending time. Time offset and transmission time-delay between parent node and child node could be retrieved from the added time information using LTS (Lightweight Time Synchronization) algorithm. Then parent node sends the time offset and transmission time to children nodes and children nodes can synchronize their time to the parent node time along the routing tree. The performance of proposed algorithm is compared to the TPSN (Timing-sync Protocol for Sensor Networks) which is known to have high accuracy using NS2 simulation tool. The simulation result shows that the accuracy of time synchronization is comparable to TPSN, the synchronization time of all sensor nodes is faster than TPSN, and the energy consumption is less than TPSN.
플러딩 라우팅 프로토콜과 양방향 LTS를 결합한 센서 노드의 시간 동기화 기법
신재혁,오현수,전중남,Shin, Jae-Hyuck,Oh, Hyun-Su,Jeon, Joong-Nam 한국정보처리학회 2011 정보처리학회논문지 C : 정보통신,정보보안 Vol.18 No.2
In wireless sensor networks Time synchronization used to be performed after routing tree is constructed. It results in increasing the number of packets and energy consumption. In this paper, we propose a time synchronization algorithm combined with flooding routing tree construction algorithm, which applies LTS (Lightweight Time Synchronization) information packed into the forwarding and backward routing packets. Furthermore, the proposed algorithm compensates the time error due to clock drift using the round time with fixed period. We prove that the proposed algorithm could synchronize the time of among sensor nodes more accurately compared to TSRA (Time Synchronization Routing Algorithm) using NS2 simulation tool. 일반적으로 센서 네트워크에서는 라우팅 트리를 구축한 후에 시간 동기화 작업을 따로 진행하였다. 그 때문에 패킷교환의 횟수가 늘어나고 전력의 소모를 유발한다. 본 논문에서는 라우팅 트리 구축과정에서 교환하는 정방향과 역방향의 패킷에 LTS(Lightweight Time Synchronization) 알고리즘 연산에 필요한 정보를 추가하여 플러딩 라우팅 트리 구축 알고리즘과 시간 동기화 과정을 결합한 알고리즘을 제안한다. 또한, 일정한 라운드 시간을 사용하여 클럭 휨으로 인한 시간 오류를 보정하였다. 제안하는 알고리즘이 TSRA(Time Synchronization Routing Algorithm) 방식보다 센서 노드들 간의 시간을 더욱 정교하게 동기화한다는 것을 NS2 시뮬레이터를 통해서 증명하였다.
『어약원방(御藥院方)』 「인후구치문(咽喉口齒門)」 중 치아질환 처방에 관한 고찰
신재혁,송지청,맹학영,엄동명,Shin, Jae-Hyuck,Song, Ji-Chung,Maeng, Hak-Young,Eom, Dong-Myung 한국의사학회 2012 한국의사학회지 Vol.25 No.1
Objectives : "Yayaoyuanfang" is a prescription book, compiled by Xuguozhen in 1267. In "Yayaoyuanfang", there are 13 chapters including "Throat, Mouth and Teeth". Because there are few prescription books focused only on mouth and teeth disease in traditional medicine, "Throat, Mouth and Teeth" in "Yayaoyuanfang" is distinctive. Methods : We try to analyze prescriptions by form, effectiveness and report experiences in "Yayaoyuanfang". Results : There are 95 prescriptions with 77 powder, 5 paste, 5 liquid, 2 granule and 5 other forms. Effectiveness of those are divided into teeth, gum and mouth. Effectiveness for teeth are about pains, weakness, cavity, discoloration and so on. Effectiveness for gum are about pain, swelling, weakness, shrinking, etc. Effectiveness for mouth is about bad breath. Conclusions : "Throat, Mouth and Teeth" in "Yayaoyuanfang" has professional prscriptions for throat, mouth and teeth with several form and effectiveness.
플러딩 라우팅 프로토콜과 양방향 LTS를 결합한 센서 노드의 시간 동기화 기법
신재혁 ( Jae-hyuck Shin ),오현수 ( Hyun-soo Oh ),전중남 ( Joongnam Jeon ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1
일반적으로 센서 네트워크에서는 라우팅 트리를 구축한 후에 시간 동기화 작업을 따로 진행하였다. 그 때문에 패킷교환의 횟수가 늘어나고 전력의 소모를 유발한다. 본 논문에서는 라우팅 트리 구축과정에서 교환하는 정방향과 역방향의 패킷에 LTS(Lightweight Time Synchronization) 알고리즘 연산에 필요한 시간정보를 추가하여 플러딩 라우팅 트리 구축 알고리즘과 시간 동기화 과정을 결합한 알고리즘을 제안한다. 또한 일정한 라운드 시간을 사용하여 클럭 휨으로 인한 시간 오류를 보정하였다. 제안하는 알고리즘이 TPSN(Timing-sync Protocol for Sensor Networks) 방식보다 적은 에너지를 사용하고 센서 노드들 간의 시간을 더욱 정교하게 동기화한다는 것을 NS2 시뮬레이터를 통해서 증명하였다.
신재혁(Jae-Hyuck Shin),송지청(Ji-Chung Song),맹학영(Hak-Young Maeng),엄동명(Dong-Myung Eom) 한국의사학회 2012 한국의사학회지 Vol.25 No.1
Objectives : 『Yayaoyuanfang』 is a prescription book, compiled by Xuguozhen in 1267. In 『Yayaoyuanfang』 there are 13 chapters including 「Throat, Mouth and Teeth」. Because there are few prescription books focused only on mouth and teeth disease in traditional medicine, 「Throat, Mouth and Teeth」 in 『Yayaoyuanfang』 is distinctive. Methods: We try to analyze prescriptions by form, effectiveness and report experiences in 『Yayaoyuanfang』. Results : There are 95 prescriptions with 77 powder, 5 paste, 5 liquid, 2 granule and 5 other forms. Effectiveness of those are divided into teeth, gum and mouth. Effectiveness for teeth are about pains, weakness, cavity, discoloration and so on. Effectiveness for gum are about pain, swelling, weakness, shrinking, etc. Effectiveness for mouth is about bad breath. Conclusions: 「Throat, Mouth and Teeth」 in 『Yayaoyuanfang』 has professional prscriptions for throat, mouth and teeth with several form and effectiveness.
『비급구법(備急灸法)』 중 「기죽마구법(騎竹馬灸法)」에 대한 고찰(考察)
신재혁 ( Jae Hyuck Shin ),송지청 ( Ji Chung Song ),엄동명 ( Dong Myung Eom ) 대한한의학원전학회(구 대한원전의사학회) 2011 대한한의학원전학회지 Vol.24 No.5
Objective: 「Qizhumajiufa」is one of the chapters in 『Beijijiufa』 and is also a name of method in moxibustion. Because it`s extraordinary way of form to find moxa-point out, there are several books that commented qizhumajiufa in history. We will try to explain how qizhumajiufa is showed in medical books(especilly in 『Beijijiufa』). Method: We try to find qizhumajiufa in medical books and its contents in those books. Result: In 1170, 『Weijibaoshu』 mentioned qizhumajiufa for the first time. In 1245, 『Beijijiufa』 also mentioned qizhumajiufa much more in detail with herbal prescriptins for disease related to qizhumajiufa. Besides, several books of moxa and acupuncture mentioned qizhumajiufa include Korean medical books. Conclusion: Qizhumajiufa is expert methods of moxibustion for abscess. In history it was a just methods of moxibustion but later it was mentioned a name of moxa-point.
『식료찬요(食療纂要)』에서 돼지고기를 이용한 식치(食治)에 대한 고찰(考察)
신재혁 ( Jae Hyuck Shin ),송지청 ( Ji Chung Song ),엄동명 ( Dong Myung Eom ) 대한한의학원전학회(구 대한원전의사학회) 2011 대한한의학원전학회지 Vol.24 No.3
『Shikryochanyo』written by Jeon Soonyi is a text that extracted paragraphs related to food therapy from medical books or materia medica of Korea and China. 『Shikryochanyo』treats disease by food instead of herbs(or drugs) and pork is the majority of methods as food therapy in『Shikryochanyo』. So there are 25 paragraphs of using pork, in 15 categories out of 45 in『Shikryochanyo』. However, it is known that pork is not recommended as a food when a person got disease and not allowed during medication in Oriental Medicine. As a food therapy in『Shikryochanyo』, not only pork itself but liver, kidney, stomach, bladder, heart, etc. are used and diverse food styles are applied as soup, porridge, roasting and so on.