• The Transactions of the Korea Information Processing Society
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• v.7 no.2
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• pp.520-528
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• 2000

he speed of microprocessor getting faster, the data transfer width between the microprocessor and the memory becomes a critical part to limit the system performance. So the study of the computer architecture with the high code density is cmerged. In this paper, a tentative Bi-Length Instruction Set Computer(BISC) that consists of 16 bit and 32 bit length instructions is proposed as the high code density 32 bit microprocessor architecture. The 32 bit BISC has 16 general purpose registers and two kinds of instructions due to the length of offset and the size of immediate operand. The proposed 32 bit BISC is implemented by FPGA, and all of its functions are tested and verified at 1.8432MHz. And the cross assembler, the cross C/C++ compiler and the instruction simulator of the 32 bit BISC are designed and verified. This paper also proves that the code density of 32 bit BISC is much higher than the one of traditional architecture, it accounts for 130~220% of RISC and 130~140% of CISC. As a consequence, the BISC is suitable for the next generation computer architecture because it needs less data transfer width. And its small memory requirement offers that it could be useful for the embedded microprocessor.

• Journal of Educational Research in Mathematics
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• v.16 no.4
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• pp.367-386
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• 2006

There are two strands for considering tile relationships between education and technology. One is the viewpoint of 'learning from computers' and the other is that of 'learning with computers'. In this paper, we call mathematics education with computers as 'computers and mathematics education' and this computer environments as microworlds. In this paper, we first suggest theoretical backgrounds ai constructionism, mathematization, and computer interaction. These theoretical backgrounds are related to students, school mathematics and computers, relatively As specific strategies to design a microworld, we consider a physical construction, fuctiionization, and internet interaction. Next we survey the different microworlds such as Logo and Dynamic Geometry System(DGS), and reform each microworlds for mathematical level-up of representation. First, we introduce the concept of action letters and its manipulation for representing turtle actions and recursive patterns in turtle microworld. Also we introduce another algebraic representation for representing DGS relation and consider educational moaning in dynamic geometry microworld. We design an integrating microworld between Logo and DGS. First, we design a same command system and we get together in a microworld. Second, these microworlds interact each other and collaborate to construct and manipulate new objects such as tiles and folding nets.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.436-437
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• 2009

본 논문에서는 로봇을 제작하고 응용함으로써 창의력을 키우고 실험과 제작을 통하여 협동심을 기르도록 하는 공학 과정을 설계하였다. 마이크로프로세서 및 무선 전송 장치 등의 차세대 유비쿼터스 개념을 통하여 이해하고 응용 및 활용하는 과정과, 반도체에 응용 제품인 컴퓨터에 대한 이론을 배우고 실습하는 과정으로 이루어져 있다. 청소년들에게 로봇을 통한 대화 공간 마련과 로봇 프로그램을 통해 과학 및 로봇분야의 인재 발굴에 기여하고 로봇에 대한 공감대 확산 및 과학 프로그램의 모델을 제시 하였다.

• The Journal of Korean Academy of Prosthodontics
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• v.57 no.3
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• pp.219-224
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• 2019

Purpose: The image registration of radiographic image and digital surface data is essential in the computer-guided implant guide system. The purpose of this study was to examine the effects of using micro-screw on the working time and convenience of operators in the process of image matching for guided implant surgery. Materials and methods: A mandibular dental model was prepared in partial edentulism for Kennedy class I classification. Two micro-screws were placed on the each side of retromolar area. Radiographic and scan images were taken using computed-tomography and digital scanning. The images were superimposed by 12 operators in software in two different conditions: using remaining teeth image alone and using teeth and micro-screws images. Working time, operator convenience and satisfaction were obtained, and analyzed using the Mann-Whitney U test (${\alpha}=.05$). Results: The working time was not statistically different between image registration conditions (P>.05); however, operator convenience and satisfaction were higher in the teeth and micro-screw assisted condition than in the teeth-alone assisted condition (P<.001). Conclusion: The use of micro-screw for the image registration has no effect in working time reduction, but improves operator convenience and satisfaction.

• The Inventors News
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• no.33
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• pp.7-7
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• 2005

이라 미츠로의 `워크맨` - 모리슨의 `원반` - 마틴의 `음성조정 마이크로 컴퓨터` - 차량용 햇빛 가리개

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1990.06a
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• pp.535-538
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• 1990

• Proceedings of the KIEE Conference
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• 1979.08a
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• pp.12-15
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• 1979

• The Science & Technology
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• v.12 no.6 s.121
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• pp.39-41
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• 1979

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1985.04a
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• pp.33-35
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• 1985

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1985.04a
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• pp.44-47
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• 1985