• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.729-730
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.741-742
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 2005.10a
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• pp.642-644
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• 2005

• Proceedings of the Korean Nuclear Society Conference
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• 2005.10a
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• pp.432-433
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• 2005

• Structural Engineering and Mechanics
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• v.52 no.4
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• pp.739-753
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• 2014

There have been many packages that can be employed to analyze plane frames. However, because most structural analysis packages suffer from closeness of system, it is very difficult to integrate it with an optimization package. To overcome the difficulty, we proposed a possible alternative, DAMDO, which integrate Design, Analysis, Modeling, Definition, and Optimization phases into an integrative environment. The DAMDO methodology employs neural networks to integrate structural analysis package and optimization package so as not to need directly to integrate these two packages. The key problem of the DAMDO approach is how to generate a set of reasonable random designs in the first phase. According to the characteristics of optimized plane frames, we proposed the ratio variable approach to generate them. The empirical results show that the ratio variable approach can greatly improve the accuracy of the neural networks, and the plane frame optimization problems can be solved by the DAMDO methodology.

• International conference on construction engineering and project management
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• 2005.10a
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• pp.515-519
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• 2005

Most information within a construction project roots in drawings and contract documents. Although several methodologies, such as A/E/C and 4D, have employed such a peculiarity to integrate project information, they failed to integrate information in terms of efficiency and consistency. In this research, a MD (Multi-Dimensional) CAD model is developed to improve the process of integrating information for construction projects. This research describes the processes of creating MD CAD objects and embedding information required throughout the project life cycle within MD CAD building components. In addition, a case study is presented to show the efficiency and effectiveness of using MDIIS (Multi-Dimensional Information Integration System) to integrate information for construction projects.

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.743-744
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• 2005

• JSTS:Journal of Semiconductor Technology and Science
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• v.15 no.6
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• pp.658-663
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• 2015

In the previous work, we have proposed an integrate-and-fire neuron circuit and synaptic device based on the floating body MOSFET [1-3]. Integrate-and-Fire(I&F) neuron circuit emulates the biological neuron characteristics such as integration, threshold triggering, output generation, refractory period using floating body MOSFET. The synaptic device has short-term and long-term memory in a single silicon device. In this paper, we connect the neuron circuit and the synaptic device using current mirror circuit for summation of post synaptic pulses. We emulate spike-timing-dependent-plasticity (STDP) characteristics of the synapse using feedback voltage without controller or clock. Using memory device in the logic circuit, we can emulate biological synapse and neuron with a small number of devices.

• Journal of the Korea Society of Computer and Information
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• v.3 no.4
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• pp.78-85
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• 1998

In this paper, we analyzed the performances for FH/CPFSK system with limiter - discriminator detection and integrate-and-dump post-detection filtering under thermal noise and partial-band jamming noise. And, we considered intersymbol interference - related SNR and differential phase parameters for all eight of the possible adjacent bit data patterns, FM noise clicks for evaluating FH/CPFSK and CPFSK systems. In result, the optimum modulation index h was 0.7 and the optimum value of bandwidth-time product D was 1.0. Next, when we considered the thermal noise under the partial-band jamming, the thermal noise significantly influenced the error probability of system below 20dB approximately but could ignore above 20dB.

• Journal of Environmental Impact Assessment
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• v.14 no.4
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• pp.203-215
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• 2005

Recently, a number of high school, college and university run the School-Based Enterprises(SBE). The purpose of this study is to integrate Education for Sustainable Development(ESD) into the SBE run by vocational high schools. To achieve this goal, this paper takes following research considerations. First of all, this study review the theories of SBE and ESD. Secondly, We extract the factors to analyze from the ESD point of view and integrate them into the SBE in vocational high schools. Thirdly, this study suggests the necessity and methods to integrate ESD into the SBE. ESD could serve important roles to promote the SBE by stimulating the sustainable development and improving human abilities in solving both the environment and development problems.