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Facts 및 Text 정보검색시스템을 위한 소프트웨어 - 인간공학적 해법
김도완 한국신호처리시스템학회 2001 융합신호처리학회 논문지 (JISPS) Vol.2 No.1
본 논문은 소프트웨어-인간공학적 원칙 (Software-Ergonomic principles)이 어떻게 사용자 우호적 HCI(Human-Computer Interaction) 디자인에 있어서 효율적으로 기여할 수 있는가를 보여준다. 다양한 실증적 연구를 통하여 우리는 하나의 이론적 모델(WOB-Model)을 만들었으며, 이 모델은 다수의 시스템 개발에 적용되어 그 가치가 인정되었다. 본 모델에 기초하여 디자인 된 시스템을 가지고 행한 사용자테스트는 소프트웨어시스템에서 일반적으로 자주 나타나는 사용상의 문제점이 없어 질 수 있음을 보여주었다. This article shows how general software-ergonomic principles are successfully applied in the design of user friendly graphical interfaces. A theoretical model(WOB-Model) is derived from empirical studies and validated in the development of several systems. It provides basic principles within a well-balanced framework and leads to concrete design guidelines. The user tests with the software shows that many of the common usability problems can be eliminated.
Application of Constraint Algorithm for High Speed A/D Converters
여수아,김만호,김종수,Nguyen, Minh Son,Yeo, Soo-A,Kim, Man-Ho,Kim, Jong-Soo 한국신호처리시스템학회 2008 융합신호처리학회 논문지 (JISPS) Vol.9 No.3
In the paper, a new Constraint algorithm is proposed to solve the fan-in problem occurred in the encoding circuitry of an ADC. The Flash ADC architecture uses a Double-Base Number System(DBNS). The DBNS has been known to represent the Multidimensional Logarithmic Number System (MDLNS) used for implementing the multiplier accumulator architecture of FIR filter in Digital Signal Processing (DSP) applications. The authors use the DBNS with the base 2 and 3 in designing ADC encoder circuits, which is called as Double Base Integer Encoder(DBIE). A symmetric map is analyzed first, and then asymmetric map is followed to provide addition ready DBNS for DSP circuitry. The simulation results of the DBIE circuits in 6-bit and 8-bit ADC show the effectiveness of the Constraint algorithm with $0.18{\mu}m$ CMOS technology. The DBIE yields faster processing speed compared to the speed of Fat Tree Encoder (FAT) circuits by 17% at more power consumption by 39%.
Modified Weighted Filter Algorithm for Noise Elimination In Mixed Noise Environments
김남호,Gao, Yinyu,Kim, Nam-Ho 한국신호처리시스템학회 2012 융합신호처리학회 논문지 (JISPS) Vol.13 No.2
Noise is regarded as an unwanted component of the image because it significantly reduces image quality. And image is often corrupted by mixed noise. In this paper an efficient modified weighted filter algorithm which combines spatial weight and intensity weight is proposed for removing mixed noise. In the proposed method, the filtering mask is separated into the four sub-windows and the parameters of the weights are confirmed by calculating local standard deviation and the mean of four sub-windows' standard deviations. Considering the spatial information and intensity information, the proposed method has good performance on not only noise elimination but also preservation of details. Simulation results demonstrate that the proposed method performs better than conventional algorithms.