• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.385-388
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• 1999

A new local model for impact ionization coefficients is proposed to account for a non-local effect. New model uses an effective electric field which comes from the path integral of a tangent electric field at an arbitrary point. The model consists of local variables, such as doping concentration, carrier concentration and gradient of the field, and can be easily applied to a conventional drift-diffusion device simulator. By comparing the results with Monte Carlo simulation, it is confirmed that new model explains the non-local effect fairly well.

• Journal of Korean Society of Rural Planning
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• v.18 no.4
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• pp.1-12
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• 2012

This study postulates a partial mediation model(study model I) and a whole mediation model(study model II) to examine the effect on endogenous rural development of local innovation capability strengthening in the local industry promotion project, the establishment of promotion system, and the revitalization of local economy. To accomplish study purposes, 169 response samples from 85 project groups which drive the local industry promotion project were verified using SPSS 12.0 and AMOS 5.0. The results showed that in the partial mediation model, the local innovation capability strengthening had a significantly positive effect on the establishment of promotion system, the establishment of promotion system had a significant effect on the revitalization of local economy, and the revitalization of local economy had a significant effect on the endogenous rural development, while the establishment of promotion system and local innovation capability strengthening didn't have effect on the endogenous rural development. In the whole mediation model, the local innovation capability strengthening had a significant effect on the revitalization of local economy, the establishment of promotion system on the revitalization of local economy, and the revitalization of local economy on the endogenous rural development. According to the verifications of study model I and II, the endogenous rural development is achieved after the revitalization of local economy through the establishment of promotion system and the local innovation capability strengthening. From these results, this study presents suggestions, limits of study and directions in the future study.

• Proceedings of the Optical Society of Korea Conference
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• 2004.02a
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• pp.278-279
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• 2004

The multiplication region of an APD(Avalanche photodiode) plays a critical role in determining the gain, the multiplication noise, and the gain-bandwidth product. we compared and analyzed the local model and the non-local model for a 10Gb/s APD designing.

• Journal of Arbitration Studies
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• v.20 no.2
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• pp.199-225
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• 2010

This study investigates the characteristics of local arbitration committees in China based on arbitration institution evaluation model. Most of the literature on Chinese arbitration committees only focuses on CIETAC. However, the promulgation of 1994 Chinese arbitration act allows local arbitration committees to deal the arbitration cases related with foreign element. Before 1994, only CIETAC and CMAC handle the arbitration cases related with foreign element. For the evaluation of the local arbitration committees, this study establishes the arbitration institution evaluation model. This model has seven evaluation criteria: accessability, independence, neutrality, rapidity, economy, professionality, and extent of enforcement. Our findings are as follows. First, Chinese local arbitration committees have the strengths in the fields of accessability, economy and rapidity. However, they are deficient in the area of neutrality, professionality, and independence. Second, the spatial distribution of Chinese local arbitration committees is not equal in China. The number of local arbitration committees is big in the high growth region such as Shandong province. On the other hand, the number of local arbitration committees is small in the economically stagnant area. Third, the size and activity of local arbitration committees are various. Some of them are very active in dispute resolution through arbitration in China. For example, Beijing Arbitration Committee(BAC), Wuhan, Quangzou Arbitration Committee play the important role in dispute resolution through arbitration. However, the large part of local arbitration committees is financially weak and depend on the local government's financial support.

• Journal of Electrical Engineering and Technology
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• v.4 no.2
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• pp.149-158
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• 2009

It is important to derive reliable parameter values in the measurement-based load model development of electric power systems. However parameter estimation tasks, in practice, often face the parameter identifiability issue; whether or not the model parameters can be estimated with a given input-output data set in reliable manner. This paper introduces concepts and practical definitions of the local identifiability of model parameters. A posteriori local identifiability is defined in the sense of nonlinear least squares. As numerical examples, local identifiability of third-order induction motor (IM) model and a Z-induction motor (Z-IM) model is studied. It is shown that parameter ill-conditioning can significantly affect on reliable parameter estimation task. Numerical studies show that local identifiability can be quite sensitive to input data and a given local solution. Finally, several countermeasures are proposed to overcome ill-conditioning problem in measurement-based load modeling.

• Industrial Engineering and Management Systems
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• v.10 no.1
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• pp.84-94
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• 2011

In this paper, we propose a method to provide the distribution of option price under local volatility model when market-provided implied volatility data are given. The local volatility model is one of the most widely used smile-consistent models. In local volatility model, the volatility is a deterministic function of the random stock price. Before estimating local volatility surface (LVS), we need to estimate implied volatility surfaces (IVS) from market data. To do this we use local polynomial smoothing method. Then we apply the Dupire formula to estimate the resulting LVS. However, the result is dependent on the bandwidth of kernel function employed in local polynomial smoothing method and to solve this problem, the proposed method in this paper makes use of model averaging approach by means of bandwidth priors, and then produces a robust local volatility surface estimation with a confidence interval. After constructing LVS, we price barrier option with the LVS estimation through Monte Carlo simulation. To show the merits of our proposed method, we have conducted experiments on simulated and market data which are relevant to KOSPI200 call equity linked warrants (ELWs.) We could show by these experiments that the results of the proposed method are quite reasonable and acceptable when compared to the previous works.

• Journal of Institute of Control, Robotics and Systems
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• v.2 no.2
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• pp.88-95
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• 1996

It is inevitable for local systems to have deviations which represent interactions and modeling errors originated from the decomposition process of a large scale system. This paper presents a decentralized control scheme for interconnected systems using local linear models and a neuro-coordinator. In the proposed method, the local system is composed of a linear model and unknown deviations caused by linearizing the subsystems around operating points or by estimating parameters of the subsystems. Because the local system has unmeasurable deviations we define a local reference model which consists of a local linear model and a neural network to estimate the deviations indirectly. The reference model is reformed into a linear model which has no deviations through a transformation of input variables and we obtain an optimum feedback control law which minimizes a local performance index. Finally, we derive a decentralized feedback control law which consists of local linear states and neural network outputs. In the decentralized control, the neuro-coordinator generates a corrective control signal to cancel the effect of deviations through backpropagation learning with the errors obtained from the differences of the local system outputs and reference model outputs. Also, the stability of local system is proved by the degree of learning of the neural network under an assumption on a neural network learning index. It is shown by computer simulations that the proposed control scheme can be applied successfully to the control of a biased two-link planar robot manipulator.

• Journal of Environmental Science International
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• v.15 no.12
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• pp.1205-1220
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• 2006

This study was conducted to develop the evaluation model which can analyse local agenda 21 comprehensively and systematically from the making process to the designed contents. The evaluation model was devised through the theoretical review of local agenda 21 and designing the evaluation system composed of evaluation domains, related indicators and scales. The evaluation system was carefully constructed based on planning theories and the discussion and agreement of specialists regarding local agenda 21. This model has three evaluation domains of process, content, and evaluation of implementation with different weighting values. Each domain contains large indicators, medium indicators and small indicators. Each indicator has different weighting value according to its importance. Basically, each small indicator was scored by 3 or 5 point scale. This evaluation system can not only analyse local agenda 21 quantitatively, but also find out good points, problems, and limits of various phases of planning and implementing local agenda 21.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2002.10a
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• pp.354-361
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• 2002

This paper propose section properties factor to generate stress history for fatigue analysis and safety inspection of steel bridge. A methodology is described for the computation of numerical stress histories in the steel truss bridge, caused by the vehicles using section properties factor. The global 3-D beam model of bridge is combined with the local shell model of selected details. Joint geometry is introduced by the local shell model. The global beam model takes the effects of joint rigidity and interaction of structural elements into account. Connection nodes in the global beam model correspond to the end cross-section centroids of the local shell model. Their displacements are interpreted as imposed deformations on the local shell model. The load cases fur the global model simulate the vertical unit force along the stringers. The load cases fer the local model are imposed unit deformations. Combining these, and applying vehicle loads, numerical stress histories are obtained. The method is illustrated by test load results of an existing bridge.

• Journal of Korean Society of Rural Planning
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• v.18 no.3
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• pp.1-11
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• 2012

This study postulates a study model to examine the effect on the local economy revitalization of a selection of local resources, the local innovation capability strengthening, the establishment of promotion system and the creation of revenues for the participant groups of the local industry promotion project. To accomplish study purposes, 169 response samples from 85 project groups which drive the local industry promotion project were verified using SPSS 12.0 and AMOS 5.0. The results showed that firstly, the selection of local resources had a significant effect on the local innovation capability strengthening. Secondly, the local innovation capability strengthening had a significant effect on the establishment of promotion system. Thirdly, the establishment of promotion system had a significant effect on the creation of revenues. Fourthly, the selection of local resources didn't have an effect on the revitalization of local economy. Fifthly, both the local innovation capability strengthening and the establishment of promotion system didn't have an effect on the revitalization of local economy. Sixthly, the creation of revenues had a significant effect on the revitalization of local economy. According to the verifications of study model, the revitalization of local economy is achieved by inducing creation of revenues through the local innovation capability strengthening and the establishment of promotion system after the selection of local resources. From these results, this study presents suggestions, limits of study and directions in the future study.