Si(100)에 이온 주입 시 에너지, 조사량과 빔 전류에 따른 면저항의 변화

김형인,정영완,이명희,강석태,Kim, Hyung-In,Jeong, Young-Wan,Lee, Myeung-Hee,Kang, Suk-Tai 한국진공학회 2011 Applied Science and Convergence Technology Vol.20 No.2

이온을 Si(100) 기판에 주입할 때 조사량과 에너지, 빔 전류가 면저항에 영향을 미치는 원인을 규명하기 위해 여러 연구자가 행하였던 실험과 동일한 조건으로 Crystal TRIM 프로그램을 이용하여 컴퓨터 시뮬레이션을 실행하였다. 주입한 $As^+$이온의 조사량을 $1{\times}10^{15}/cm^2$로 일정하게 하고 에너지를 5, 10, 15 keV로 변화시켜 계산한 결과 에너지가 커질수록 Rp값은 표면에서 깊어지는 반면에, 표면근방에 축적되는 격자손상은 증가하였다. 20keV의 B+이온을 $5{\times}10^{15}/cm^2$의 동일한 조사량으로 1mA와 7 mA의 빔 전류에 해당하는 값을 이용하여 계산한 결과 빔 전류가 커질수록 표면근방 100 nm 이내에서 격자손상이 증가하였다. 20 keV의 일정한 에너지로 B+이온을 $1{\times}10^{15}$, $3{\times}10^{15}/cm^2$ 조사량과 0.8 mA와 8 mA의 빔 전류로 각각 계산한 결과 조사량이 많아질수록, 빔 전류가 커질수록 표면 근방에 축적되는 격자손상의 양이 증가하였다. 이러한 에너지, 조사량과 빔 전류증가에 의한 시료표면의 격자손상 증가는 시료표면의 면저항을 감소시킨다. Simulations were performed using Crystal TRIM software under the same conditions used by previous researchers in order to clarify the mechanism that determines sheet resistance various doses, energies and beam currents. The results showed that the peak of the depth profile (Rp) in the same sample gradually shifts inward and damage increases near the surface as the energy increases for $As^+$ equal dose of $1{\times}10^{15}/cm^2$ implanted into Si(100) energies of 5, 10, and 15 keV. From a theoretical calculation of B+ ion implantation processes at energy of 20 keV using parameters that correspond to 1 mA and 7 mA beam currents with the same dose of $5{\times}10^{15}/cm^2$, it was found that the higher beam currents resulted in more damage near the surface (<100 nm). Likewise, In the simulations employing sets of doses ($1{\times}10^{15}$, $3{\times}10^{15}/cm^2$) and beam currents (0.8 mA, 8 mA), more damage was produced at larger doses and higher current. Thus, sheet resistance at the surface was reduced by the intensified damage from increases in beam energy, dose and beam currents.

12주 OROS-Methylphenidate 약물 치료 후 ADHD 아동의 삶의 질 변화

김형인(Hyung In Kim),김붕년(Bung-Nyun Kim),조수철(Soo-Churl Cho),신민섭(Min-Sup Shin),유희정(Hee-Jeong Yoo),김재원(Jae-Won Kim),김지훈(Ji-Hoon Kim),손정우(Jung-Woo Son),신윤미(Yun-Mi Shin),정운선(Un-Sun Chung),한덕현(Doug-Hyun Han) 대한소아청소년정신의학회 2012 소아청소년정신의학 Vol.23 No.3

Objectives:The aim of this study is to investigate the effectiveness of treatment with osmotic-release oral system methylphenidate (OROS-MPH) on quality of life (QOL) in children with attention-deficit hyperactivity disorder (ADHD). Another aim is to assess the relationship between change in QOL and other factors including children’s symptoms and academic performance or parents’ depression and parenting stress. Methods:A total of 111 medication-naive children with ADHD in a multicenter, open-label, 12-week trial of OROS-MPH completed an evaluation using diverse rating scales at two time points; at baseline and after 12 weeks of treatment. Scales for investigation of children included the Parent Report Form-Children’s Health and Illness Profile-Children’s Edition (PRF-CHIP-CE) on QOL, the ADHD Rating Scale-IV on symptoms, and the Academic Performance Rating Scale (APRS). The Beck Depression Inventory and Parenting Stress Index were used for assessment of their parents. Results:Total scores for mean PRF-CHIP-CE increased from 207.9±26.7 at baseline to 226.3±25.9 after 12 weeks of treatment (p<.001). The change of APRS showed the strongest correlation with the increment of PRF-CHIP-CE scores (Pearson coefficient=0.561, p<.001), even after controlling for other factors (partial correlation coefficient=0.420, p<.001). Conclusion:Treatment with MPH-OROS results in improvement of QOL in children with ADHD in Korea. The advance in academic performance plays a key role in this change of QOL.

논문 : 미국의 토착적 평등주의와 개인주의

김형인(Hyung In Kim) 한국미국사학회 2001 미국사연구 Vol.14 No.-

차상컴퓨터장치 식별 코딩 설계방법에 대한 연구

최권희(Choi Kwon-Hee),라준호(Ra Joon-Ho),심재철(Shim Jae-Chul),김형인(Kim Hyung-In),정성윤(Jung Sung-Yun) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-

In a high speed train, OBCS(On-Board Computer System) is a up-to-date computer control system that provide controlling, monitoring, maintaining and reparing of the important device, supporting a driver, status of a train, service maintenance, managing the remote control mode, driving order & control, control of a electrical or pneumatic circuit and a passenger service. In general, OBCS is located in each car but in a power car, both main and auxiliary computers are used. These avoid a network collision and maintain the independence of condition and failure records with the information of line number, train number and car number. This paper is intended to provide the information about the identification coding method of domestic and foreign OBCS, for the new high speed train (KTX-II).

고속전철 네트워크용 네트워크 계층 구현

김석헌(Kim Seok-Heon),김형인(Kim Hyung-In),정성윤(Jung Sung-Youn),김한도(Kim Han-do),박재현(Park Jaehyun) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

Recently, a high speed rail consists of many train coaches and power cars. For keeping the reliable train communication system with train coaches and power cars, train uses the OSI model(Open Systems Interconnection Basic Reference Model) and KTX(Korea Train eXpress) only uses the Physical to Transport layer of OSI model. This paper describes the analysis of CLNP(Connectionless Network Protocol) and ES-IS(End System to Intermediate System) protocols used in KTX for the network layer. CLNP is used to end data to other system and ES-IS protocol is used to route and send information between end systems and intermediate systems. Also this paper presents the protocol parsing program and implementation of Network layer.

KTX OBCS 하부장치 프로토콜 분석방법

정성윤(Jung Sung-Youn),김형인(Kim Hyung-In),강기석(Kang Ki-Sok),김현식(Kim Hyun-Sik),정도원(Jung Do-Won) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월

경부고속열차(KTX)의 차상컴퓨터(OBCS)의 하부장치는 차량의 안전과 유지보수에 도움이 되는 유지보수와 고장정보현시장치이며 이용객에게 편의시설과 환경을 제공하는 서비스제공 장치들이다. KTX 차량의 하부장치에는 크게 운전자지원단말기인 TECA와 행선지표시장치인 PID 그리고 승무원고 장표시장치인 FDTR과 객실온도 조절장치인 HVAC, 무선데이터 송수신을 위한 MDT등이 있다. 그러나 이러한 하부장치는 유지보수와 고장분석 그리고 노후장치의 개발을 위해 하부장치에 대한 하드웨어 사양분석과 함께 OBCS 장치와 하부장치의 통신프로토콜의 분석이 병행되어야 한다. 이러한 하부장치 통신 분석을 위한 접근을 위해 프로토콜 분석기를 이용한 분석방법을 정의함으로서 올바른 데이터 수집과 분석 그리고 Data 응용을 통한 유지보수기능의 향상과 하부장치개발에 도움이 되고자 한다. Peripheral devices of OBCS in kyeongbu KTX serve various function. those services operate to make sure the safety of trains by displaying some malfunction signs of system and help maintain them appropriately. and they also provide various services for passengers in KTX They divide into TECA which supports drivers with various data, PID which displays where to go, FDTR, HVAC, MDT etc. To develop superannuated devices, maintain and check its malfunction, we need to analyse hardware specification, OBCS and also protocol for communication devices simultaneously. here, we're trying to find how to find efficient approach by using a protocol analyser properly. We're going to develop peripheral devices to elevate and improve maintenance functions by collecting, compiling data.

KTX 고장코드 수집 소프트웨어의 구조와 기능개선

정성윤(Jung Sung-Youn),김형인(Kim Hyung In),정도원(Jung Do Won),조택선(Cho Taek Seon) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

The collection of KTX trainset fault code is made by DEP software. We can improve software function and update data after understanding DEP software function and software structure. For the improvement of trainset function and its performance, the same improvement of performance and structure change as DEP software, which collects and analyzes train"s fault information, are required. Accordingly, we made a research for functional strucfure of KTX fault code collection software, STR3F, variable declaration through Script.rxr file and code analysis method and proceeded research for realizing more improved user environment of DEL software and fault analysis method.

KTX 운전자지원 단말기의 하드웨어와 장치개발에 대한 연구

정성윤(Jung Sung-Youn),김형인(Kim Hyung-In),강기석(Kang Ki-Sok),김현식(Kim Hyun-Sic),정도원(Jung Do-Won) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

TECA(Terminal Cabin) has train information, fault display, maintenance function and training function for driver, as sub-device of Seoul-Pusan Express train"s on-board computerized device. Concerning KTX train"s driving, signal driving is required for high speed driving, and it is true that we have difficulty in troubleshooting and acquisition of basic information through long train and one-man driving. Therefore, rapid and correct processing about various information and TECA device for maintenance are indispensable for its utilization. But there is not study example in hardware, maintenance about this device and device development according to new requirements. Therefore, this study will help understanding of driver assistance terminal device"s maintenance performance development, describing TECA"s basic functions necessary for device development and its requirements. Accordingly, I suppose that this thesis will be utilized to complete specification, necessary for new driver assistance terminal device development.

KTX OBCS의 고장정보수집 및 고장감시기능의 활용

정성윤(Jung Sung-Youn),김형인(Kim Hyung-In),강기석(Kang Ki-Seok),정도원(Jung Do-Won) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

KTX OBCS has computers, peripheral devices and command control channels. The computers are connected to TORNAD* network. The peripheral devices are connected to computers. The command control channels are used for the KTX vehicle's control, monitoring and maintenance. The OBCS provides drivers and maintenance engineers with the analysis and monitoring of the hindrance to the train service by utilizing the vehicle network information and low-voltage input/output control channel. The operation and maintenance feature of the OBCS enables KTX to have safe train service and immediate maintenance for the hindrance. also makes it possible to monitor the static and dynamic status of each device and compatibility of the system by analysing malfunction and integrity under certain circumstances and by enhancing equipments quality. This paper could introduce the efficient maintenance system and new applications and serve as a reference material for the immediate and safe analysis of KTX vehicle and its devices.

고속 열차용 네트워크의 MAC 계층 개발

이범용(Lee Bum-Yong),김형인(Kim Hyung-In),정성윤(Jung Sung-Youn),박재현(Park Jaehyun) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-

Real-time communication network is important for KTX high speed train system because small problem can make a huge accident. Communication network for KTX high speed train system consists of IEEE 802.4 token bus network and FM0 encoding. The network device is developed by using MC68824 TBC, MC68185 TPM and MC68020 MPU. The network device make available to analysis of the network protocol among vehicles for Kyung-Boo high-speed train system.