• 한국통신학회논문지
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• 제27권10C호
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• pp.999-1007
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• 2002

본 논문에서는 DSSS (Direct Sequence Spread Spectrum) 수신기에서 초기동기 탐색에 사용될 수 있는 정합필터에 대해서 연구하였다. 하드웨어기술언어 (HDL)로 정합필터를 구현하기 위한 모델이 제시되었다. 제안된 모델은 고속 처리를 위해 병렬처리와 파이프라인 구조를 기반으로 하는데 환형버퍼, 곱셈기, 덧셈기, 코드참조표 등으로 구성되어 있다. 제안된 모델에 대해 성능을 분석하였고 일반적인 DSP (Digital Signal Processor)로 구현할 경우와 비교하였다. 제안된 모델을 FPGA (Field Programmable Gate Array)상에 구현하였고 타이밍 시뮬레이션 결과를 통해서 동작을 검증하였다.

• 한국광학회:학술대회논문집
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• 한국광학회 1989년도 제4회 파동 및 레이저 학술발표회 4th Conference on Waves and lasers 논문집 - 한국광학회
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• pp.85-88
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• 1989

Introducing and optimizing it-significance to the Hopfield model, ten highly correlated binary images, i.e., numbers "0" to "9", are successfully stored and retrieved in a 6x8 node system. Unlike many other neural networks models, this model has stronger error correction capability for correlated images such as "6", "8", "3", and "9". the bit-significance optimization is regarded as an adaptive learning process based on least-mean-square error algorithm, and may be implemented with another neural nets optimizer. A design for electro-optic implementation including the adaptive optimization networks is also introduced.uding the adaptive optimization networks is also introduced.

• 동아시아식생활학회지
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• 제19권5호
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• pp.827-835
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• 2009

컴퓨팅 테그놀로지 도입은 직장이나 조직내에서 커다란 변화를 가져온다고 한다. 이 연구는 레스토랑 내에서의 IT도입이 종사자들의 직업에 대한 태도와 고객에 대한 행동에 미치는 영향을 파악하는 것을 목적으로 한다. 이 연구에서 IT 도입에 따른 종사자들의 태도를 측정하는 변수는 IT 도입에 대한 인식, 내적 동기 부여, 전반적인 직업의 만족도, 조직에 대한 긍지이며, 종사자들의 행동 변수로는 고객에 대한 긍정적인 행동이 사용되었다. 이 연구의 표본은 full-service, mid-scale의 레스토랑에 종사하는 종업원들이다. 제안된 연구 모형에 포함된, IT 도입에 따른 종사자들의 태도와 행동의 변화를 조사하기 위하여 6개의 가설이 수립되었다. 이 연구는 조직 환경의 변화에 따른 직무에 대한 인식과 태도의 연관성에 대한 지식을 발전시킨다는 면에서 의미가 있다. 이 연구의 산업계에 대한 실증적인 공헌은 레스토랑 owner나 manager에게 컴퓨터 기술 도입에 대한 결정을 하는데 유용한 시사점을 줄 수 있다는 것이다.

• 한국IT서비스학회지
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• 제9권1호
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• pp.141-156
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• 2010

Service industry has become the integral part of economy. And the activation of industry requires a scientific and systematic approach. As one of these kinds of efforts, IBM presented a service model which consisted of strategies, processes, technology, manpower and so on through Service Science. And IBM raised the needs of considering the main issue and methodology of service model's scientific approach. On that account, this study worked out factorial definitions and measurable items by the four components of service model presented by Service Science in order for it to be measured through studies on related literature and interviews of specialists. In order to prepare an opportunity of categorizing the conception of the service model of which character was strongly intangible and of systematically approaching to it, the investigator examined related literature and applied it QFD methodology. Through this kind of redefinition, the investigator concretely conceptualized the service model which was standstill at the level of theoretical approach so far and presented guidelines with which researchers could classify it more concretely. In addition, the investigator tried to present a systematic frame which could be applied to business by working-level officials or decision-makers. Therefore, the investigator expects that study findings will be used as references for the design or implementation of service-oriented business model.

• 조명전기설비학회논문지
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• 제28권12호
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• pp.74-83
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• 2014

This paper proposes a study on the configuration of balancing of plant(BOP) and implementation of battery management system(BMS) functions for vanadium redox flow battery(VRFB) and propose a method consists of sensor and required design specifications BOP system configuration. And it proposes an method of the functions implementation and control algorithm of the BMS for flow battery. Functions of BMS include temperature control, the charge and discharge control, flow control, level control, state of charge(SOC) estimation and a battery protection through the sensor signal of BOP. Functions of BMS is implemented by the sensor signal, so it is recognized as a very important factor measurement accuracy of the data. Therefore, measuring a mechanical signal(flow rate, temperature, level) through the BOP test model, and the measuring an electrical signal(cell voltage, stack voltage and stack current) through the VRFB charge-discharge system and analyzes the precision of data in this paper. Also it shows a good charge-discharge test results by the SOC estimation algorithm of VRFB. Proposed BOP configuration and BMS functions implementation can be used as a reference indicator for VRFB system design.

• 농업과학연구
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• 제48권4호
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• pp.815-829
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• 2021

The purpose of this study is to construct a flatfish outlook model that is consistent with the "Fisheries outlook" monthly publication of the fisheries outlook center of the Korea Maritime Institute (KMI). In particular, it was designed as a partial equilibrium model limited to flatfish items, but a model was constructed with a dynamic ecological equation model (DEEM) system, considering biological breeding and shipping times. Due to limited amounts of monthly data, the market equilibrium price was calculated using a recursive model method as the inverse demand. The main research results and implications are as follows. As a result of estimating young fish inventory levels, the coefficient of the young fish inventory in the previous period was estimated to be 0.03, which was not statistically significant. Because there is distinct seasonality, when estimating the breeding outcomes, the elasticity of breeding in the previous period was found to exceed 0.7, and it increased more as the weight of the fish increased, in addition, the shipment coefficient gradually increased as the weight increased, which means that as the fish weight increased, the shipment compared to the breeding volume increased. When estimating shipments, the elasticity of breeding in previous period was estimated to respond elastically as the weight increases. The price flexibility coefficient of the total supply was inelastically estimated to be -0.19. Finally, according to a model predictive power test, the Theil U1 was estimated to be very low for all of the predictors, indicating excellent predictive power.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2003년도 봄 학술발표회 논문집
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• pp.145-152
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• 2003

This paper develops a relatively comprehensive and sophisticated constitutive model of concrete for finite element analysis of concrete structures. The present model accounts for the hydrostatic pressure sensitivity and Lode angle dependence behavior of concrete, not only in its strength criterion, but also in its hardening characteristics. The implementation is carried out through incorporating the developed concrete model in User Subroutine Material(UMAT) of the general-purpose FE program ABAQUS(v.5.8). It is found that the model can sufficiently predict the hardening as well as the softening behaviour of concrete under high confining pressure.

• 한국시뮬레이션학회논문지
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• 제8권2호
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• pp.57-72
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• 1999

With the rapidly increasing complexity of decision-marking or system development in the fields of industry, management, etc., modelling techniques using simulation has become more highlighted. Particularly, the advent of parallel computer systems not only has opened a new horizon of parallel simulation, but also has greatly contributed to the speed-up of the execution of simulation. The implementation of parallel simulation, however, is not a easy job for those who accustomed to the existing computer systems. And it is also necessarily confronted with the problem of synchronization conflict in the process. Thus, how to allow a wider community of users to gain access to parallel simulation while solving synchronization conflicts has become an important issue in simulation study. As a method to solve these problems, this paper is primarily concerned with the implementation of GPSS which is a generally used simulation language for discrete event simulation, onto a parallel computer using C-LINDA. For that, this paper, is to suggest a model and algorithm and to experiment it using a case.

• International Journal of Internet, Broadcasting and Communication
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• 제10권3호
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• pp.51-58
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• 2018

In order to utilize various data provided by Korea public open data portal, data should be systematically managed using a database. Since the range of open data is enormous, and the amount of data continues to increase, it is preferable to use a database capable of processing big data in order to analyze and utilize the data. This paper proposes data modeling and implementation method suitable for public data. The target data is subway related data provided by the public open data portal. Schema of the public data related to Seoul metro stations are analyzed and problems of the schema are presented. To solve these problems, this paper proposes a method to normalize and structure the subway data and model it in NoSQL database. In addition, the implementation result is shown by using MongDB which is a document-based database capable of processing big data.

• 공학교육연구
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• 제11권2호
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• pp.42-49
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• 2008

한국공학교육인증원의 첫 번째 인증기준인 ‘프로그램 교육목표’는 두 번째 인증기준인 ‘프로그램 학습성과 및 평가’에 비해 용어로서의 익숙함은 있으나, 실제 실천 방안이나, 인증평가를 위한 준비에 대한 이해는 부족하였다. 심지어 용어의 익숙함으로 인해 오히려 인증기준에 적절하지 않고 측정 가능하지 않은 추상적인 어휘를 사용하여 교육목표를 설정하여 인증평가 시 부족사항으로 지적 받는 경우도 있었다. 본 연구는 인증에서 요구하는 성과중심과 수요자중심 교육의 철학을 만족하고, 교육프로그램의 지속적인 개선이 가능하도록 ‘프로그램 교육목표’에 대한 실천방안과 인증평가 준비에 대해 모형을 갖춰 제시하고자 한다. 본 모형은 ‘프로그램 교육목표’ 기준의 5가지 하위 세부기준을 분석하여 이들도 모두 만족할 수 있는 방안을 제시하였다. 그러므로 각 프로그램은 본 모형을 적절히 이용하여 자신들만의 특성화를 이룩할 수 있으며, 부차적으로 교육목표에 대한 인증평가도 무난히 준비할 수 있으리라 기대한다.