• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.38 no.3
• /
• pp.57-57
• /
• 2001

본 논문에서는 RFID를 위한 읽기 전용 CMOS 트랜스폰더를 one-chip으로 설계하였다. 리더에서 공급되는 자기장으로부터 트랜스폰더 칩의 전원을 공급하기 위한 전파정류기를 NMOS 트랜지스터를 사용하여 설계하였으며, 데이터 저장 소자로는 64비트의 ROM을 사용하였다. 메모리에 저장되어 있는 ID 코드는 Manchester 코딩되어 front-end 임피던스 변조 방식으로 리더에 전송된다. 임피던스 변조를 위한 감폭회로로는 리더와 트랜스폰더 사이의 거리가 변해도 일정한 감폭율을 갖는 새로운 감폭회로를 사용하였다. 설계된 회로는 0.65㎛ 2-poly, 2-metal CMOS 공정을 사용하여 IC로 제작되었다. 칩 면적은 0.9㎜×0.4㎜이다. 측정 결과 설계된 트랜스폰더 IC는 인식거리 내에서 약 20∼25%의 일정한 감폭율을 보이며, 125㎑의 RF에 대해 3.9kbps의 데이터 전송속도를 보인다. 트랜스폰더 칩의 전력소모는 읽기 모드시 약 100㎼이다. 인식거리는 약 7㎝이다.

• Korean Journal of Child Studies
• /
• v.28 no.4
• /
• pp.187-196
• /
• 2007

This study evaluated attachment representation of school aged children, its relation to classification of family drawings, and their association with children's perceptions about families. The attachment representation of 43 children 6-9 years of age was evaluated by the Manchester Attachment Story Task (Green, Stanley, & Goldwyn, 2003) children's family drawings were classified by Fury's Family Drawing Scales (1996). Results showed that 12 children (28%) were avoidant, 23 (54%) secure, 4 (9%) resistant, and 4 (9%) were disorganized. Classification of childhood attachment representation showed a high concordance rate (86%) with family drawings. Securely Attached children showed positive perceptions such as family pride/happiness and vitality/creativity while Insecure children showed negative perceptions like emotional distance, tension and bizarreness.

• Journal of Mechanical Science and Technology
• /
• v.15 no.2
• /
• pp.199-209
• /
• 2001

Modal analysis method (MAM) is introduced for the fully coupled structural dynamic problems. In this paper, the beam with active constrained layered damping (ACLD) treatment is considered as a representative problem. The ACLD beam consists of a viscoelastic layer that is sandwiched between the base beam structure and an active piezoelectric layer. The exact damped natural modes are spectrally formulated from a set of fully coupled dynamic equations of motion. The orthogonality property of the exact damped natural modes is then derived in a closed form to complete the modal analysis method. The accuracy of the present MAM is evaluated through some illustrative examples: the dynamic characteristics obtained by the present MAM are compared with the results by spectral element method (SEM) and finite element method (FEM). It is numerically proved that MAM solutions become identical to the accurate SEM solutions as the number of exact natural used in MAM is increased.

• Proceedings of the KSR Conference
• /
• 2007.05a
• /
• pp.1735-1740
• /
• 2007

Communication network in KTX (Korea Train eXpress), the express train system, has to transmit status variables periodically within tens of seconds and real-time control informations which has short reply like status transition or alarm. KTX uses $Tornad^*$ (TOken Ring Network Alsthom Device) network for this purpose. This network can send and receive messages which enable express train applications embedded in intelligence boards to communicate by itself. Layer 1, 2 of $Tornad^*$ is implemented with differential manchester encoding and IEEE 802.4 standard(token bus standard) respectively. To implement layer 1 and 2, we implemented twisted pair modem using FPGA for layer 1 and used MC68824 from Motorola for layer 2. MC68824 bus arbitration and memory controller is implemented using CPLD.

• International Journal of Control, Automation, and Systems
• /
• v.6 no.3
• /
• pp.339-350
• /
• 2008

A general active fault-tolerant control framework is proposed for nonlinear systems with sensor faults. According to their identifiability, all sensor faults are divided into two classes: identifiable faults and non-identifiable faults. In the healthy case, the control objective is such that all outputs converge to their given set-points. A fault detection and isolation module is firstly built, which can produce an alarm when there is a fault in the system and also tell us which sensor has a fault. If the fault is identifiable, the control objective remains the same as in the healthy case; while if the fault is non-identifiable, the control objective degenerates to be such that only the healthy outputs converge to the set-points. A numerical example is given to illustrate the effectiveness and feasibility of the proposed method and encouraging results have been obtained.

• Journal of Acupuncture Research
• /
• v.33 no.4
• /
• pp.181-190
• /
• 2016

Objectives : This study reports the clinical effects of Korean medical treatment on a patient with suspected diabetic muscle infarction (DMI). Methods : A patient diagnosed with spinal stenosis was suspected of DMI. The patient was treated with acupuncture, bee-venom pharmacopuncture and gastrocnemius stretching. Symptoms were evaluated by verbal numeric rating scale (vNRS), Oswestry disability index (ODI) and Manchester foot pain and disability index (MFPDI). Results : After approximately 5 weeks of Korean medical treatment, including 8 bee-venom treatments, vNRS, ODI, and MFPDI all decreased. Conclusion : The results suggest that Korean medical treatment is effective for treating pain caused by DMI.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.16 no.10
• /
• pp.881-886
• /
• 2003

This paper describes the design and implementation of a passive transponder chip for RFID applications. Passive transponders do not have their own power supply, and therefore all power required for the operation of a passive transponder must be drawn from the field of the reader. The designed transponder consists of a full wave rectifier to generate a dc supply voltage, a 128-bit mask ROM to store the information, and Manchester coding and load modulation circuits to be used for transmitting the information from the transponder to the reader. The transponder with a size 410 x 900 ${\mu}$m$^2$ has been fabricated using 0.65 ${\mu}$m 2-poly, 2-metal CMOS process. The measurement results show the data transmission rate of 3.9 kbps at RF frequency 125 kHz.

• Journal of the Korean Society for Industrial and Applied Mathematics
• /
• v.13 no.3
• /
• pp.181-188
• /
• 2009

Hundreds of thousands of South Korean protesters staged candlelight vigils and demonstrations against US beef imports in 2008. The problems, however, went far beyond that of beef imports. The political party veterans, who lost the presidential election, exploited labor unions that were discontent with the economy and ideological student groups to weaken the majority party. In this study, an epidemiological model is constructed with a system of three nonlinear differential equations. The model seeks to examine the dynamics of the system through stability analysis. Two threshold conditions that spread the protests are identified and a sensitivity analysis on the conditions is performed to isolate the parameters to which the system is most responsive. The results are also explored by deterministic simulations. This model can be easily modified to apply to other protests that may occur in various circumstances.

• STI Policy Review
• /
• v.1 no.1
• /
• pp.43-62
• /
• 2010

Whatever the country, nanotechnology features as a key priority of most national research and innovation policies. This focus on nanotechnology is due to the promises of this general purpose technology, this new technological wave. As 'one size does not fit all', policies supporting its development cannot just adopt the 'best practices' of the preceding wave. We argue that specific on-going dynamics of nanoscience and technology production justifies the existence of dedicated nanotechnology policies. It also questions the portfolio of instruments mobilized and their balance. In this article, we discuss policies developed for the preceding technological waves and, based on the characteristics of nanosciences and technologies, propose five dimensions of policies to be taken into consideration for their governance at the country and cluster levels.

• Journal of the Korea Safety Management & Science
• /
• v.10 no.4
• /
• pp.65-72
• /
• 2008

The Manchester Driver Behavior Questionnaire (DBQ) is the most commonly used frameworks for investigating the relationship between self-reported driving behavior and accident involvement. After Reason et al. introduced DBQ, there were many studies replicating the research of Reason et al. in many countries. There was, however, no study replication of the Reason's research in Korea. The aim of this study is to replicate the distinction among errors, lapses and violations, and to evaluate the relationship of these behaviors with road traffic accidents on Korean drivers. 223 Korean drivers completed the Korean version of original DBQ with questions regarding background information, such as age, gender, annual mileage and accident involvement. Participants answered self-assessment questions, also. Factor analysis revealed three factors like Reason et al. The three factors were dangerous errors, violations and relatively harmless errors.