• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.1022-1027
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• 2003

The Motion controllers provide the sophisticated performance and enhanced capabilities we can see in the movements of robotic systems. Several types of motion controllers are available, some based on the kind of overall control system in use. PLC (Programmable Logic Controller)-based motion controllers still predominate. The many peoples use MCU (Micro Controller Unit)-based board level motion controllers and will continue to in the near-term future. These motion controllers control a variety motor system like robotic systems. Generally, They consist of large and complex circuits. PLC-based motion controller consists of high performance PLC, development tool, and application specific software. It can be cause to generate several problems that are large size and space, much cabling, and additional high coasts. MCU-based motion controller consists of memories like ROM and RAM, I/O interface ports, and decoder in order to operate MCU. Additionally, it needs DPRAM to communicate with host PC, counter to get position information of motor by using encoder signal, additional circuits to control servo, and application specific software to generate a various velocity profiles. It can be causes to generate several problems that are overall system complexity, large size and space, much cabling, large power consumption and additional high costs. Also, it needs much times to calculate velocity profile because of generating by software method and don't generate various velocity profiles like arbitrary velocity profile. Therefore, It is hard to generate expected various velocity profiles. And further, to embed real-time OS (Operating System) is considered for more reliable motion control. In this paper, the structure of chip-based precision motion controller is proposed to solve above-mentioned problems of control systems. This proposed motion controller is designed with a FPGA (Field Programmable Gate Arrays) by using the VHDL (Very high speed integrated circuit Hardware Description Language) and Handel-C that is program language for deign hardware. This motion controller consists of Velocity Profile Generator (VPG) part to generate expected various velocity profiles, PCI Interface part to communicate with host PC, Feedback Counter part to get position information by using encoder signal, Clock Generator to generate expected various clock signal, Controller part to control position of motor with generated velocity profile and position information, and Data Converter part to convert and transmit compatible data to D/A converter.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.42 no.1
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• pp.57-67
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• 2005

Fast scalar multiplication of points on elliptic curve is important for elliptic curve cryptography applications. In order to vary field sizes depending on security situations, the cryptography coprocessors should support variable length finite field arithmetic units. To determine the effective variable length finite field arithmetic architecture, two well-known curve scalar multiplication algorithms were implemented on FPGA. The affine coordinates algorithm must use a hardware division unit, but the projective coordinates algorithm only uses a fast multiplication unit. The former algorithm needs the division hardware. The latter only requires a multiplication hardware, but it need more space to store intermediate results. To make the division unit versatile, we need to add a feedback signal line at every bit position. We proposed a method to mitigate this problem. For multiplication in projective coordinates implementation, we use a widely used digit serial multiplication hardware, which is simpler to be made versatile. We experimented with our implemented ECC coprocessors using variable length finite field arithmetic unit which has the maximum field size 256. On the clock speed 40 MHz, the scalar multiplication time is 6.0 msec for affine implementation while it is 1.15 msec for projective implementation. As a result of the study, we found that the projective coordinates algorithm which does not use the division hardware was faster than the affine coordinate algorithm. In addition, the memory implementation effectiveness relative to logic implementation will have a large influence on the implementation space requirements of the two algorithms.

• Korean Medical Education Review
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• v.11 no.2
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• pp.15-24
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• 2009

Medical Students' competencies depend on the medical school curriculum. Basic medical education, in particular, is an important starting point for further medical competency development. We aimed to identify the most important areas of reform in the basic medical education curriculum of Yonsei Medical School. To accomplish this, we sought case studies of different medical schools and discussion points for quality improvement methods. A qualitative comparison method saturated through the systematic discussions on the emerging thematic approaches to determine the current directions in medical school curriculum reform. The discussions, which involved 7 experts, spanned 8 months and were based on a literature review, with focus on the 7 selected case studies. From the discussions, we concluded that in order to improve basic medical education curriculum, the following measures need to be carried out. First, an outcome-based curriculum is to be designed. The expected outcome is to be deliberately and succinctly defined and should be expressed as teaching and learning objectives. Second, the core subjects and elective subjects are to be classified on the basis of the aim, content, and passage level of the subjects. Hence, the core curriculum must be treated as a standard part of medical knowledge, and the elective curriculum must be richer and more in-depth. Third, universities should institutionalize regular evaluation of their departments. Appropriate and just evaluations should be made, and feedback given to the school's administrative department. Fourth, the departmental and administrative management of the basic medical education curriculum should be harmonized with each other. Finally, teaching and learning resources are to be increased and diversified and made available to professors and students for basic medical education.

• Archives of design research
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• v.20 no.3 s.71
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• pp.235-246
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• 2007

The study aims to design an integrated remote controller, which is an increasingly essential device in the home, for more convenient use. For this purpose, an alternative user interface (UI) design was developed by applying the user interface system of a popular existing product to an integrated remote control highly usable and easy to learn for domestic use, and the usability was evaluated. For the existing popular product, a cellular phone was selected, the operation method of which is similar to the stick-type integrated remote control for which the user interface design was to be developed in this research. Common characteristics of the UI of the selected cellular phone were derived and the characteristics were applied as much as possible to the design of a stick-type integrated remote control. The prototype of the alternative design, which was simulated with Flash, went through two pilot tests for further improvement before making the final experimental prototype. Based on the results, prototype buttons that improved the feeling of use in terms of physical operation and feedback were made, and the usability of the new UI design of a stick-type integrated remote control for domestic use were evaluated with 41 university students in their 20s. According to the results of the experiment, the newly designed stick-type integrated remote control based on the UI of an existing product may improve the usability of remote controls and the outcome of this study is expected to provide a good model for R&D of new UI designs of stick-type integrated remote controls for domestic use.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.16 no.7 s.98
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• pp.671-680
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• 2005

The CFL linearisation chip which is one of key devices in ultra-narrowband mobile radio transmitter using CQPSK digital modulation method is designed and implemented with $0.35{\mu}m$ CMOS technology. The reduced size and low cost of transmitter are available by the use of direct-conversion and CFL ASIC chip, which improve the power effi챠ency and linearity of transmitting path. In addition, low power operation is possible through CMOS technology The performance test results of transmitter show -25 dBc improvement of IMD level at the 3 kHz frequency offset and then satisfy FCC 47 CFR 90.210 E emission mask in the operation of CFL ASIC chip. At that time, the transmitting power is about PEP(Peak-to-Envelope Power) 5 W. The main parameters to improve the transmitting characteristic and to compensate the distortion in feed back loop such as DC-offset, loop gain and phase value are interfaced with notebook PC to be controlled with S/W.

• Journal of the Korean Geographical Society
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• v.40 no.1 s.106
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• pp.109-125
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• 2005

The purpose of this study is to develop a role play instruction model to increase higher-order thinking abilities in geographical education. This study reviewed the references which included the contents of higher-order thinking abilities, and discussed the educational significance and application of role play instruction model. The developed role play instruction model was applied to four classes in high school in Korea. After applying the model, this study asked some question about the model to the students which engaged in this model. Higher-order thinking essentially means thinking that takes place in the higher-levels of the hierarchy of cognitive processing. Higher-order thinking abilities contain critical thinking abilities, creative thinking abilities, problem solving and decision making abilities, meta-cognition abilities. The role play instruction model is an effective method which can increase higher- order thinking abilities. The questioning to students which engaged in the class of applying to role play instruction model provides feedback about development instruction models to increase higher-order thinking abilities.

• Journal of Science Education
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• v.35 no.2
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• pp.149-158
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• 2011

The purpose of this study is to improve education program for Informal Science Education Institution by analyzing education program of Natural History Museum, one of informal science education institution. This research subject is Seodaemun Museum of Natural History, located in Seodaemun-Gu, Seoul. It is Public Natural History Museum, which runs more than 60 education programs every year continuously for recent 6 years. Objects of this study are 32 education programs for 3rd to 6th grade of elementary school. The result of study shows that teaching materials of programs, run by informal science education institution, don't contain enough script and activity for improving creativity and inquiring mind. As the result of the study, it is required that guidance plan of education program be developed with more activities, teaching method and script, to seek quality of class than quantity of that when developing education program of science education institutes. And it is required to develop teaching material using creative technique and to improve medium and long term program for development of feedback.

• Korean Security Journal
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• no.13
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• pp.71-90
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• 2007

Under the hypothesis that social behavior appears with personal differences. this study tried to make it clear that sociality factors are precedence variables, through characterization of the relationship between university students' sociality factors and multidimensional leadership factors. To achieve this goal, we have selected as a population university Taekwondo players participating in playing currently in 2006, sampled 228 subjects using the convenience sampling, and then finally used their data. Data were processed through descriptive analysis, factor analysis reliability analysis, correlation analysis and multiple regression analysis using SPSS 12.0, and conclusions were drawn as follows. Through such a process and method, we have yielded the following results. First, the responsibility our of the sociality factors appears to have significant influence on the types of training & direction, positive feedback, and social support at the level of p<.001, on the type of authoritative behavior at the level of p<.01, and on the type of democratic behavior at the level of p<.05. Second, the sociability out of the sociality factors proves to have significant influence on the type of training & direction at the level of p<.05. Third, the planning out of the sociality factors turns out to have significant influence on the type of social support at the level of .001, and on the types of democratic behavior and authoritative behavior at the level of p<.01.

• The Journal of the Korea Contents Association
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• v.16 no.10
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• pp.503-513
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• 2016

Innovator and Early Adopter are main clients of smart phone until now, but the silver generation enjoying price stability and the Internet emerges, so a strategy of the importance, systematic classification, and focus of a neglected class is needed. It is necessary to analyze UI that can departmentalize not a neglected class limited to the silver generation but potential users who can be voluntarily users and can secure them. To secure them, the researcher analyzes how Windows, Icons, Mouse Pull-Down-Menus(WIMP) of UI has been applied in the process that skeuomorphism UI of iPhone, Metro UI of MS, and Material UI of Google change. As a result of an analysis, skeuomorphism is not entirely new and has secured potential users slowly with a method to compensate and improve a part that users disregard. As a concept of touch UI, Metro UI considered potential users from the beginning but did not secure them with new and epoch-making UI. However, Material UI of Google compensates the weaknesses of skeuomorphism UI and Metro UI and emphasizes cost-effectiveness, so has developed into UI that can secure final consumers of potential users. Therefore, to secure potential users, it should make users themselves understand why they should use smart phone, and it should approach with more organized studies on UI through feedback of observation and direct talks.

• The Journal of the Korea Contents Association
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• v.17 no.12
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• pp.368-377
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• 2017

The purpose of this study was to find improvement measures of the internal accreditation system which is spontaneously operated by A university. To do so, this study reviewed the historical backgrounds and current issues of A university's internal accreditation system mainly based on government's accreditation and financial support programs on higher education institutes. And, this study also analyzed qualitative data which were collected via interviews with members of the committee of internal accreditation and the minutes of accreditation related meetings. These procedures were conducted by using Nvivo 11, which is specially designed for the qualitative research method. The main results of this study were the following: the current issues that A university's internal accreditation system faced included the faculties' unwillingness to participate due to the administrative work load caused by the internal accreditation program, and the difficulties of the preparation of evaluation reports caused by the ambiguity of evaluation standards. The measures for improving A university's internal accreditation system included (1)offering the enough time and detailed information for the preparation of evaluation reports, and (2)providing the specific feedback and the consistent and systematic management, (3)establishing the ordinary recording system of achievement, (4)setting the standards for the renewal of accreditation, (5)setting the evaluation standards that considers the uniqueness of various faculties, and lastly, (6)providing the official templates for evaluation reports.