MPLS의 GSMP 인터페이스에 관한 연구

차영욱,김진년,백현규 安東大學校 工業技術硏究所 2001 공업기술연구논문집 Vol.8 No.1

계층 3의 라우팅과 계층 2의 레이블 스위칭 기술을 통합한 MPLS는 고속의 전달, 트래픽 엔지니어링 그리고 가상 사설망 서비스의 지원을 가능하게 한다. 레이블 스위치 및 제어기 사이에서 동작하는 GSMP 프로토콜을 연결, 구성, 장애, 성능관리 및 동기화 기능을 제공하는 개방형 인터페이스이다. 개방형 인터페이스는 다양한 융통성을 제공하는 반면에 전통적인 스위치-대-스위치 연결설정에 비하여 지연을 감수하여야 한다. GSMP 기반의 개방형 인터페이스에서 망 관리를 위한 SNMP에이전트는 레이블 스위치 또는 제어기에 탑재될 수 있다. 본 논문에서는 MPLS네트워크의 전달평면과 제어평면사이에 적용된 GSMP 인터페이스에서 병렬형 연결설정 방안과 망 관리 모델에 대하여 제안하였다. MPLS, which integrates routing of layer 3 and switching of layer 2, enables support of fast forwarding, traffic engineering and virtual private network services. GSMP is open interface, which provides connection, configuration, event and performance management and adjacency protocol between label switch and controller. The GSMP open interface separates control plane and transport plane. This separation allows flexibility in the network, but it suffers more setup delay than the traditional switch-by-switch connection setup. In the GSMP open interface, the functions of network management will be located either in controller or in label switch. This paper proposes parallel mechanism of connection establishment and network management model, in which the GSMP open interface is applied between control plane and transport plane of the MPLS network.

Cerebral Dissecting Aneurysms in Patients with Essential Thrombocythemia

Baek, Jin Wook,Kim, Young Don The Korean Neurosurgical Society 2014 Journal of Korean neurosurgical society Vol.56 No.3

The etiologies of intracranial artery dissection are various, the exogenous as well as inherited connective tissue disorders. We report on a patient who presented with diffuse subarachnoid hemorrhage who had been suffered from essential thrombocythemia. He was diagnosed to multiple dissecting aneurysms of left superior cerebellar artery, left posterior inferior cerebellar artery and right pericallosal artery and treated with endovascular coil embolization.

Advantages and disadvantages of the ENVOY 6F distal access guiding catheter in endovascular coiling for anterior circulation aneurysms

JIN WOOK BAEK,Sung-Chul Jin,Sung Tae Kim,Young Jin Heo,Ji Yeon Han,Jung Hwa Seo,Sung Hwa Paeng,Jung Soo Kim,Hae Woong Jeong,Young-Gyun Jeong 대한뇌혈관외과학회 2019 Journal of Cerebrovascular and Endovascular Neuros Vol.21 No.1

Objective : Selecting an appropriate guiding catheter to provide both sufficient supportability for working devices and sufficient distal navigability is essential for ensuring the success of a procedure. This study aimed to evaluate the advantages and disadvantages of using the ENVOY 6F distal access (DA) guiding catheter in coil embolization of anterior circulation cerebral aneurysms. Methods : We included 98 patients (72 [73.5%] women, median age: 63 [range: 25-84] years) who underwent endovascular coiling with the ENVOY 6F DA guiding catheter from May to November 2016. We analyzed data on patient demographics and the number of co-axial techniques to position the guiding catheter, initial and final location of the catheter, and complications related to the catheter. Results : The co-axial technique was used to position the ENVOY 6F DA guiding catheter in the internal carotid artery (ICA) in 20 cases (20.41%). The initial position of the ENVOY 6F DA guiding catheter involved the cervical ICA (79.6%), horizontal petrous ICA (17.3%), and vertical petrous ICA (3.1%). Final control angiograms after endovascular coiling showed proximal change in the final, compared to the initial, position of the ENVOY 6F DA guiding catheter in 25 cases (25.51%). Procedure-related complications were observed in nine patients (9.18%), involving vasospasm in all cases; however, there was no symptomatic case. Conclusion : The ENVOY 6F DA guiding catheter had relatively sufficient distal navigability without symptomatic procedural complications. However, the change in the catheter position after endovascular coiling denoted insufficient supportability.

Comparative Analysis of Three Different Cervical Lateral Mass Screw Fixation Techniques by Complications and Bicortical Purchase : Cadaveric Study

Baek, Jin-Wook,Park, Dong-Mook,Kim, Dae-Hyun The Korean Neurosurgical Society 2010 Journal of Korean neurosurgical society Vol.48 No.3

Objective : The purpose of this study is to compare the incidence of possible complications of cervical lateral screw fixation and the achievements of bicortical purchase using the Roy-Camille, Magerl and the modified methods. Methods : Six fresh-frozen cervical spine segments were harvested. The Roy-Camille technique was applied to C3 and C4, and the Magerl technique was applied to C5, C6, and C7 of one side of each cadaver. The modified technique was applied to the other side of each cadaver. The nerve root injury, violation of the facet joint, vertebral artery injury, and the bicortication were examined at each screwing level. Results : No vertebral artery injury was observed in any of the three methods. One nerve root injury was observed in each cervical spine segment using the Roy-Camille method (8.3%), the Magerl method (5.6%), and the modified method (3.3%). Facet joint injuries were observed in two cervical spinal segments using the Roy-Camille method (16.7%) and three with the Magerl method (16.7%), while five facet joint violations occurred when using the modified method (16.7%). Bicortical purchases were achieved on ten cervical spinal segments with the Roy-Camille method (83.3%) and Magerl method (55.6%), while twenty bicortical purchases were achieved in the modified method (66.7%). Conclusion : The advantages of the modified method are that it is performed by using given anatomical structures and that the complication rate is as low as those of other known methods. This modified method can be performed easily and safely without fluoroscopic assistance for the treatment of many cervical diseases.

로켓 데이터 분석과 실시간 통신 계획 수립

박진욱(Jin-wook Park),박소정(So-jeong Park),민성희(Sung-hee Min),백승연(Seung-yeon Baek),한효원(Hyo-won Han),김태오(Tae-oh Kim),김대욱(Dae-wook Kim) 한국추진공학회 2022 한국추진공학회 학술대회논문집 Vol.2022 No.5

본 논문은 2021년도에 제작 및 발사한 로켓의 개선점을 파악하기 위해 각 시스템 별로 분석을 실시하였다. 추진 시스템에서는 예상 추력과 연소 실험에서 측정된 추력이 상이하였고 그 원인 파악을 시도하였다. 전자 시스템에서는 GPS 연결에 실패해 데이터 수집이 되지 않았고, 기압계로 고도를 추정하였다. 회수 시스템의 경우, 낙하산 사출은 정상적으로 이루어졌지만 낙하산이 끊어져 로켓이 훼손되었다. 분석 결과를 바탕으로 시스템 별 목표를 설정하였다. Long range wireless technology를 이용한 실시간 통신으로 GPS 연결 상태를 모니터링하고, 낙하산 강제 사출을 구현하는 것을 2022년도 핵심 목표로 결정하였다. This paper analyzed each system of rocket manufactured and launched in 2021 to understand improvements. In propulsion system, expected thrust was not equal to thrust measured in combustion test and tried to figure out causes. In avionics system, collecting data was failed because of failure to connect GPS and expect altitude with barometer. In case of recovery system, parachute ejection was successful but rocket was broken because parachute’s ropes were cut. Based on the analysis results, goals for each system were set. Monitoring GPS connection status and implementing parachute forced ejection with real-time communication using long range wireless technology were determined as the key goals for 2022.

입체 3D 이미지 초해상도 알고리즘

백진욱(Jin-Wook Baek),이인권(In-Kwon Lee) 한국컴퓨터그래픽스학회 2013 한국컴퓨터그래픽스학회 학술대회 Vol.2013 No.6

Analysis of Genetic Similarity Detected by AFLP and PCoA among Genotypes of Kenaf (Hibiscus cannabinus L.)

Kim, Wook-Jin,Kim, Dong-Sub,Kim, Sang-Hoon,Kim, Jin-Baek,Goh, Eun-Jeong,Kang, Si-Yong 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.4

Seventeen kenaf varieties collected from several regions around Asia and Europe were grown in Korea and their genetic diversity was analyzed using morphological characters and AFLP technique. In the morphological analysis, the 17 varieties were divided into two major groups according to stem diameter, plant height, and flowering periods. The late varieties, which could yield more bio-mass compared with the early-medium varieties, were included in one of two major groups. Nonetheless, it is difficult to identify individual varieties based on morphological characters because of their limited variation. For the AFLP analysis, 34 primer combinations generated a total of 3,193 polymorphic bands (out of 3,914) with a polymorphic rate of 82%. The clusters were divided into two major groups with a similarity coefficient of 0.63 by UPGMA analysis method; but each group did not show a common tendency. Additionally, the results of the AFLP analysis did not show similar tendency compared with morphological data, a result that might be explained in terms of convergent evolution, i.e. the acquisition of morphologically similar traits between distinctly unrelated varieties.

ISO 26262에 근거한 건설기계 스마트 브레이크 HARA 선행 연구

백진욱(Jin-Wook Baek),김명곤(Myoung-Gon Kim),김수인(Su-In Kim),조용근(Young-Geun Cho) 대한기계학회 2019 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.7 No.2

현재 건설기계는 자동화를 넘어 초연결 스마트 건설기계로의 개발이 활발히 진행 중이지만 아쉽게도 건설기계의 전기전자제어 시스템 기능 안전에 대한 표준은 현업의 스마트 부품 개발의 속도를 따라가고 있지 못한 실정이며 산업계에 혼란을 야기할 수도 있는 실정이다. 따라서 현재 활발한 논의와 개발이 이루어지고 있는 차량용 기능 안전 표준에 대한 선행 연구를 통해 건설기계 부품에 대한 적용시뮬레이션을 수행하였다. ISO 26262는 2018년 개정 작업을 통해 표준의 명확화를 이루었고 이에 따라 machine control의 하나의 중요한 기능이라고 할 수 있는 스마트 브레이크에 대한 초기 단계의 분석을 진행하였다. 스마트 브레이크 기능에 대한 FMEA와 HARA를 진행하여 SIL 등급을 산정하는 시뮬레이션을 진행하였고 이것은 추후 구체적인 개발 사양과 함께 참조할 만한 자료가 될 것이다. Nowadays construction equipment are developing into hyper-connectivity and smart system beyond the autonomous. Therefore, we carried out the simulation about part of construction equipment through a preliminary study of the automotive functional safety under active discussion and development currently, and then we performed an initial analysis of smart brake function which is an important function among the machine control. FMEA and HARA of smart brake functions have been conducted to simulate the determination of SIL rating, and this work product will be a reference to develop the part.

불소계 폴리올에스테르의 합성과 윤활 특성

백진욱 ( Jin Wook Baek ),정근우 ( Keun Wo Chung ),김영운 ( Young Wun Kim ) 한국공업화학회 2002 공업화학 Vol.13 No.8

2-에틸헥실 카르복실산, 스테아린산 및 퍼플루오르옥틸 카르복실산을 NPG 및 TMP의 폴리올과 축합반응하여 새로운 불소계 폴리올 에르테르를 합성하여 ^1H-NMR과 FT-IR 스펙트라로 구조를 확인하였다. 퍼플루오르옥틸 카르복실산으로 합성한 폴리올 에스테르는 오일에 대한 용해성이 전혀 없었으며 2-에틸헥실 카르복실산과 혼합하여 합성한 부분-불소화 폴리올 에스테르는 구조에 따라 용해성의 차이를 나타내었다. ASTM D 2266과 ASTM D 2783에 의해 4구 마모성능과 극압성능을 관찰한 결과, 4구 마모성능은 부분-불소화 폴리올에스테르를 첨가하여도 별 효과를 관찰하지 못하였지만 극압성능은 불소 함량이 증가함에 따라 현저히 향상되었으며 폴리올 에스테르의 구조에 따라 차이를 나타내었다. 또한, 부분-불소화 폴리올 에스테르를 가솔린 엔진오일에 첨가하여 극압성능을 시험한 결과 비교 제품인 테프론 입자를 첨가하였을 때보다 우수한 극압성능을 나타내었다. New partially fluorinated polyol esters were synthesized by condensation reaction of polyols (NPG and TMP) and carboxylic acids such as 2-ethylhexanoic acid, stearic acid and perfluorooctanoic acid. The structures of polyol esters were confirmed by FT-IR and ^1H-NMR. And, the fluorinated polyol esters were insoluble in several oils, however the partially fluorinated polyol esters were soluble in several oils depending on the structures of polyol esters. The physical properties such as 4-ball wear properties and extreme-pressure (EP) properties were characterized by ASTM D 2266 and by ASTM D 2783 method, respectively. As the results, wear scar diameters of oils in which the semi-fluorinated polyol esters were added were not changed compared to those of non-added oils. On the contrary, extreme-pressure properties remarkably increased with fluorine contents of the esters and were affected by the structure of acid moiety and polyol moiety. Also, the extreme-pressure property of semi-fluorinated NPG polyol ester in gasoline engine oil was better than that of commercial Teflon coating additive.

무용지도자의 언어적·비언어적 커뮤니케이션이 수강생들의 만족과 장기적관계지향성에 미치는 영향

백승진(Baek, Seung-Jin),한진욱(Han, Jin-Wook),박혜리(Park, Hye-Ri) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.4

The purpose of the study was to examine how the verbal and nonverbal communication of dance instructors affects the satisfaction and long-term relationship intention of trainees. To achieve this goal, 250 trainees were conveniently selected from sports centers, community centers, and culture centers in Seoul and Gyeonggi-do. 238 usable samples were utilized data analysis including frequency analysis, reliability analysis, exploratory factor analysis, correlation analysis, simple regression analysis, and multiple regression analysis. The results of this study were as follows. Firstly, the verbal communication of dance instructors significantly affected customer satisfaction. Secondly, body language, paralanguage, and physical appearance subfactors of the dance instructors’ nonverbal communication, significantly affected customer satisfaction, while spatial language did not. Thirdly, customer satisfaction had a significant impact on long-term relationship intension. Also, the study presented details on discussions and on-site application plans as well as future research opportunities.