• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.145-145
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• 2009

In this paper, we suggest how to adapt RFID system to train switching process, and then what we get the merit or problem. We analyze the train switching process to adapt RFID system on the process and have field test. The role of RFID system in train switching process is to automatically read car position information. The specification of the test system is 900MHz, and Gen2 passive tag. If we get the system which automatically read car position information in train switching yard, it prevents human errors and makes more reliability, the performance of train operation will grow up. Even though the environment of train switching yard is outdoors, the test result gives us the ability to adapt RFID system to train switching process and the process will be more simple.

• Proceedings of the IEEK Conference
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• 2001.06c
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• pp.209-212
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• 2001

In this paper, an intelligent notification system has been presented. The system operates on both wired and wireless internet. When a new message has been uploaded in a bulletin board systems(BBS) on HTTP web server, it sends the same message to their cellular phones of all members of a given group at the same time via SMS(Short Message Service). In addition, on reading SMS message, those who read them respond to a WAP server using pulling technique via wireless internet. Therefore, the HTTP server does know the members who did not read the message yet. Two different web servers, the HTTP server and the WAP server, running on a single system has been implemented. They share the single database which covers al1 related information about the BBS. The set of experiments shows that the notification system works well as we have expected Thus, we conclude that the proposed system that operates on both wired and wireless internet is the one of successful model for such environments.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.32A no.11
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• pp.52-62
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• 1995

We developed a two-dimensional numerical simulator which can analyze the electrical as well as optical characteristics and evaluate the detection performances of self-signal processing infrared detectors. It solves the poisson equation and the electron, hole current continuity equations including the optical generation and recombination models. To speed up convergency rate. the Newton algorithm is used. Automatic triangular grid generator make it easy to simulate the devices with the various read-out geometries. This simulator can show the variation of spatial resolution which is caused by the transit velocity and transit time dispersion in bifurcate and horn geometries respectively. Also, we calculated the responsivity, noise, and detectivity in respect of the applied electric field and background field-of-view. The results obtained from simulation correspond to those of experiments, and it is verified that horn read-out geometry has the superior spatial resolution and detection performance to bifurcate geometry.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.32A no.11
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• pp.71-78
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• 1995

Based on the popular 4-transistor SRAM cell, an analytical expression of the minimum cell ratio was derived by modeling the static read operation. By analyzing the relatively simple expression for the minimum cell ratio, which was derived assuming the ideal transistor characteristics, effects of the changes in supply voltage and process parameters on the minimum cell ratio was predicted, and the minimum power supply voltage for read operation was determined. The results were verified by simulations utilizing the suggested simulation method, which is suitable for monitoring the lower limit of supply voltage for proper cell operation. From the analysis, it was shown that the worst condition for cell operation is low temperature and low supply voltage, and that the operation margin can be effectively improved by reducing the threshold voltage of the cell transistors.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.647-650
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• 2005

In this paper, a low voltage SRAM using double boosting scheme is described. A low supply voltage deteriorates the static noise margin (SNM) and the cell read-out current. For read/write operation, a selected word line and cell VDD bias are boosted in a different level using double boosting scheme. This increases not only the static noise margin but also the cell readout current at a low supply voltage. A low voltage SRAM with 32K ${\times}$ 8bit implemented in a 0.18um CMOS technology shows an access time of 26.1ns at 0.8V supply voltage.

• JSTS:Journal of Semiconductor Technology and Science
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• v.14 no.5
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• pp.503-507
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• 2014

The on-state resistance ($R_{ON}$) instability of standard complementary metal-oxide-semiconductor (CMOS) antifuse cells has been observed for the first time by using acceleration factors: stress current and ambient temperature. If the program current is limited, the $R_{ON}$ increases as time passes during read operation.

• Journal of Urban Science
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• v.6 no.2
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• pp.11-16
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• 2017

Giuseppe Terragni was one of the founding member and a leading Italian Rationalist pursued a new and more rational synthesis between the nationalistic values of Italian Classicism and structural logic of the machine age. Casa Giuliani Frigerio, a four-story apartment housing in Como, is one of his last major work and is worth to investigate the composition of facades in terms of ambiguity. Unlike the Casa del Fascio, it is never possible to read an priori whole and to allow static and unified readings in a traditional alignment. Due to its misalignments found within the facades of Casa Giuliani Frigerio, it is evident to present unstable and disjunctive readings. These distinctive facades are read as layers applied onto some equally unstable underlying layer and form an ensemble of unexpected unity.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.775-778
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• 1998

근래에 들어 컴퓨터 기술은 멀티미디어 기수의 발달과 더불어 그에 따른 데이터량의 증가로 인해 데이터를 처리, 전송, 저장하는 모든 부문에서의 고속, 대용량화를 요구하고 있다. 이 중에서 특히 저장장치 부문은 응용 프로그램이 대형화되고 멀티미디어화에 따른 데이터량이 크게 증가하는 추세에 있기 때문에 지속적인 용량 증가가 요구되고 있다. 이런 상황에서 주목을 받고 있는 것이 신호처리 방식을 개선하여 저장장치의 기록 밀도를 향상시키는 기술의 하나인 partial response maximum likelihood (PRML) 기술이다. PRML 방식은 HDD 나 광 디스크로부터 데이터를 읽어낼때의 신호처리 기술 중의 ㅎ나로 신호간 간섭을 허용하여 데이터 속도를 증가시키고, 신호를 재생할 때 신호간 간섭을 보상하여 원래 신호를 복원해 내는 기술이다. 이를 이용하면 기존의 기록방식에 비해 기록밀도를 20-50% 정도 높일 수 있다.〔1〕〔2〕

• Journal of Engineering Education Research
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• v.14 no.2
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• pp.30-39
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• 2011

There is a problem that some spoken words are not consistent with the written words when Arabic numerals in Korean language are read. Since some rules for reading the Arabic numerals are not clear, the numerals should be read carefully by recognizing the position of the numbers in sentence, the relationship of the numerals with measurement nouns and other writing elements, and context. In view of technical writing, this work is to appreciate some rules for writing Korean numerals in place of Arabic numerals by studying the works regarding numerals, classifiers and measurement nouns.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.07a
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• pp.411-414
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• 2010

본 논문은 비디오 처리를 위한 고성능의 메모리 제어기를 설계하였다. 메모리 제어기는 arbiter에 의해 제어되며 이것은 메모리 억세스를 요구하는 모듈들의 요구 신호를 받아 데이터를 전송하는 역할을 해주게 된다. 구현된 메모리 제어기는 버스를 사용하기 위한 승인을 받기 위해서 마스터와 신호를 주고 받는 MAU블록, grant 신호를 디코딩하고 컨트롤 신호의 상태를 정의한 arbiter 블록, SDRAM의 ac parameter를 저장하고 bank의 준비 여부, read/write 가능 여부, precharge와 refresh의 가능 여부를 확인하여 system과 read/write가 준비되었다는 신호를 출력, SDRAM의 실질적인 입력신호를 생성하는 memory accelerator 블록, 생성된 입력신호를 저장하고 마스터에서 직접 write data를 입력 받는 memory I/F 블록으로 구성된다. 이 메모리 제어기는 174.28MHz의 주파수로 동작하였다. 본 설계는 VHDL을 이용하여 설계되었고, ALTERA의 Quartus II를 이용하여 합성하였다. 또한 ModelSim을 이용하여 설계된 회로를 검증하였다. 구현된 하드웨어는 StatixIII EP3SE80F1152C2 칩을 사용하였다.