• 대한수학교육학회지:학교수학
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• 제4권2호
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• pp.147-160
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• 2002

The purpose of this study is to examine the The correlation between information processing types and mathematical communication abilities / word problem solving abilities. The results obtained are as follows: 1 Simultaneous/continuous information process types showed statistically high correlation with mathematical communication abilities. However, the correlation between simultaneous information process and mathematical communication abilities is a little higher than the correlation between continuous information process and mathematical communication abilities. 2. There is a high correlation between mathematical communication abilities and word problem solving abilities. Especially, speaking ability is much more correlated with four factors of word problem solving than reading, writing and listening, Through this study, we can conclude that information process types should be consider ed in order to improve mathematical communication abilities and mathematical communication abilities is essential in word problem solving.

• 한국기계연구소 소보
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• 통권10호
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• pp.35-48
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• 1983

When the hydrodynamic coefficients of the ship maneuvering equation are estimated by captive model test, it is difficult to take account of the scale effect between model and full scale ship. This scale effect problem can be overcome by processing the sea trial data with system identification. Extended Kalman filter is used as a system identification technique for the modification of the simulation equation as well as the estimation of hydrodynamic coefficients. The phenomena of simultaneous drifting of linear coefficients occur. It is confirmed that two coefficients in each pair-($Y_v$', $Y_r$' -m' u'), ($N_v$', $N_r$' )-are simultaneously drifting and all 4 coefficients are simultaneously drifting together. Particularly simultaneous drifting of 2 coefficients in each pair is more significant. It is also shown that the simultaneous drifting of 4 coefficients can be reduced by choosing the input data which have the random v'/r' curve and 4 coefficients are estimated within 2-4% error, which may be noise level. So, it is recommended to operate the rudder randomly in sea trial or model test for the application of system identification technique.

• 한국과학교육학회지
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• 제20권1호
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• pp.155-165
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• 2000

이 연구는 초등학교 6학년 235명을 대상으로 학생의 정보 처리 유형과 인지 양식에 따른 과학 문제 해결 정도를 알아보는 것을 목적으로 하였다. 이 연구의 결과는 다음과 같다. 첫째, 학생들은 두 가지 정보처리 방식에서 높은 점수를 받을수록 과학 성취 문항과 창의적 문제해결 문항을 잘 해결하였다. 그리고 동시적 정보 처리 검사에서 높은 점수를 받을수록 과학개념 이해 문항을 잘 해결하였다. 둘째, 학생들이 장독립적 성향이 높을수록 과학 성취 문항과 창의적 문제해결 문항을 잘 해결하였다. 그리고 과학개념 이해 문항의 해결에서는 특히 좀 더 높은 장독립적 성향이 요구되었다. 마지막으로, 정보 처리 유형에 따른 인지 양식의 분포에 통계적으로 유의미한 차이가 있었다. 학생들이 두 가지 정보 처리 방식에서 높은 점수를 받을수록 그들의 인지 양식은 장독립적 성향이 높았다.

• 한국대기환경학회지
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• 제20권2호
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• pp.185-193
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• 2004

A catalyst with CuO ceramic filter for simultaneous treatment of dust and HAP was prepared and characterized. Catalytic ceramic filter can not only potentially achieve the substantial savings in energy but provide with effective optimization and integration of process for simultaneous removal of SO$_2$, NO$_{x}$ and particulates from flue gases. Catalytic ceramic filters remove simultaneously particulates on exterior surface of filters and reduce NO to $N_2$ and $H_2O$ by SCR (Selective Catalytic Reduction) process. Preparation of catalyst impregnated ceramic filter with disk shape (Ψ 50) follow the processing of alumino-silicate ceramic filter, support impregnation and catalyst impregnation (copper oxide). Preparation routes of alumino-silicate catalyst carrier suitable for production of catalytic filters practically were studied and developed using the sol-gel and colloidal processing, homogeneous precipitation and impregnation method. Characterization of the catalyst, catalyst carrier catalytic filter materials have been performed the using various techniques such as BET, XRD, TGA, SEM. Combination of the sol-gel and colloidal processing and impregnation method is recommended to prepare catalyst carriers economically for catalytic filter applications.s.

• 한국컴퓨터정보학회논문지
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• 제26권4호
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• pp.63-74
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• 2021

위치 기반 서비스(LBS)는 가장 바쁜 시간에 동시에 도착하는 최단 경로 및 k-최근접 이웃 질의를 포함한 다양한 공간 질의를 효과적으로 처리한다. 동시에 도착하는 공간 질의를 빠르게 처리하기 위한 간단한 해결 방법은 LBS 서버를 추가하는 것이다. 이 방법은 서비스 운영 비용을 많이 증가시킨다. 최근에는 공유 가능한 계산을 사용하여 일련의 질의를 한꺼번에 모아서 처리하는 일괄 처리 방법이 제안되었다. 본 연구에서는 교통 상황에 따라 각 도로 구간의 이동 시간이 빈번하게 변하는 동적 공간 네트워크에서 움직이는 k-최근접 이웃 질의를 한꺼번에 처리하는 방법을 연구한다. 순차적 질의 처리를 기반으로 하는 LBS 서버는 중복 계산으로 인해 한꺼번에 요청이 들어오는 움직이는 k-최근접 이웃 질의를 효과적으로 처리하지 못한다. 본 연구의 목표는 움직이는 k-최근접 이웃 질의를 한꺼번에 처리하고 공유 가능한 계산을 재사용하여 알고리즘을 효율성을 개선한다. 실제 지도 데이터를 사용한 실험 평가는 최신 방법보다 제안된 방법이 우수하다는 것을 보여준다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.149-151
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• 2002

We had been developing the variety of parallel processing systems in order to improve the processing speed of visual media applications. These systems were using multi-access memory system(MAMS) as a parallel memory system, which provides the capability of the simultaneous accesses of image points in a line-segment with an arbitrary degree, which is required in many low-level image processing operations such as edge or line detection in a particular direction, and so on. But, the performance of these systems did not give a faithful speed because of asynchronous feature between MAMS and processing elements. To improve the processing speed of these systems, we have been investigated a pipelined parallel processing system using MAMS. Although the system is considered as being the single instruction multiple data(SIMD) type like the early developed systems, the performance of the system yielded about 2.5 times faster speed.

• 한국음향학회지
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• 제43권2호
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• pp.184-199
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• 2024

잔여의 채널 간 간섭은 일반적인 시역전 처리 기반의 동시 다중 집속에서의 주요 문제점으로 고려되어진다. 본 논문에서는, 다수의 음원이 존재하는 수중 도파관환경에서의 채널 간 간섭을 완화하기 위해 그람-슈미트 과정을 시역전 처리에 적용하였다. 해상 실험 데이터 기반 수치 시뮬레이션을 통해 여러 위치로의 널 형성 및 서로 다른 음원의 위치에서의 각기 다른 신호의 왜곡 없는 동시 다중 집속이 가능함을 능동 시역전 처리 관점에서 검증하였다. 또한, 적응 시역전 처리 방법에 비해 수신기 개수의 감소에 상대적으로 적은 영향을 받는 것을 확인하였다. 제안된 알고리즘을 통해 수동 다중 입·출력 수중 통신에서의 채널 간 간섭이 효율적으로 제거됨을 해상 실험 데이터를 통해 보였다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2007년도 춘계학술발표대회
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• pp.1294-1296
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• 2007

The IEEE 802.11 DCF forces neighboring nodes of an active transmitter to switch into inactive state. This conservative nature brings frame latency at transmitter neighborhood. This work exploits the IEEE 802.11n Frame Aggregation scheme to allow simultaneous transmissions from nodes that are neighbors to each-other. This is accomplished by the synchronization of control and data transmissions in slots of fixed length. Proposed scheme reduces the frame latency and improves aggregated network throughput.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.215-220
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• 2005

Nowadays, various speech processing systems are being introduced in the fields of robotics. However, real-time processing and high performances are required to properly implement speech processing system for the autonomous robots. Achieving these goals requires advanced hardware techniques including intelligent software algorithms. For example, we need nonlinear amplifier boards which are able to adjust the compression radio (CR) via computer programming. And the necessity for noise reduction, double-buffering on EPLD (Erasable programmable logic device), simultaneous multi-channel AD conversion, distant sound localization will be explained in this paper. These ideas can be used to improve distant and omni-directional speech recognition. This speech processing system, based on embedded Linux system, is supposed to be mounted on the new home service robot, which is being developed at KIST (Korea Institute of Science and Technology)

• 한국정보처리학회논문지
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• 제7권7호
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• pp.2179-2187
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• 2000

This paper provides a heuristic analysis technique which determines an optimal number of V\ulcorner/V\ulcorner pads meeting allowable Simultaneous Switching Noise(SN) budget, early in the design phase. Until now, in determining the number of V\ulcorner/V\ulcorner pads, designers had to simulate packaging models case by case in the design phase or roughly allocate the power/ground pins in an inaccurate way according to typical design rules. However, due to the high density and frequency trends of IC technologies, the V\ulcorner/V\ulcorner pads allocation method can affect an adverse effect on IC operations, which requires more accurate and efficient methods be devised. Thus, this paper proposes an analytic V\ulcorner/V\ulcorner pads calculation method that gives a practical help for packaging designs early in the design phase. The proposed method is applied to a design example of a 1/8x208 pin plastic quad flat package (PQFP) and the results are verified through simulation using HSPICE.