• IE interfaces
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• v.15 no.4
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• pp.364-373
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• 2002

This paper developed an operating software for the manufacturing cell of a model plant. The model plant, which was manufactured by Fishertechnik, consists of an assembly cell, a machining cell, and supplementary material handling equipments. Each I/O module of the model plant communicates with the INTERBUS controller devices via High-level Language Interface(HLI). The machining center has two machining cells, which consists of 4 machines respectively, two 3-axis portal transporters, and a rail guided vehicle(RGV). The Petri-Net was used to investigate the dynamics of each machining cell, e.g., the relation of material handling equipments and machines. The operating software was analyzed and designed by Object Oriented Technique. The software was implemented using Delphi 3.0 under Windows 95/NT operating system.

• Membrane Journal
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• v.1 no.1
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• pp.59-59
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• 1991

A theoretical and experimental study made in order to determine the performance of mem-brane contactors in water carbonation is presented. In particular on the basis of experimental results pre-viously obtained it has been derived an expression in which the effect of some parameters as temprera-ture water and CO₂ flow rate CO₂ pressure trans-membrane pressure on the performance of the process is taken into account. The study refers to hollow fiber membrane contactors used for the experimental tests. The main scope has been to verify if by membrane contactors it is possible to reach the same de-gree of water carbonation as by trditional methods (1-5 g/1) and to derive for the module used a cor-relation able to describe the performance of the process at several operating conditions. The high CO₂ removal observed confirms the interesting potentialties of membrane contactors also in gas streams purification.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.542-545
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• 2002

This paper deals with the optimization inverter design and minimization Conduced EMI noise by customizing IPM(Intelligent Power Module). Generally, In case of IPM, we realized that the trade-off relation between switching loss and spike voltage. Higher gate resistor causes tile lower spike voltage and the higher turn-off switching loss. But we know that the life cycle of inverter and the susceptibility of noise, so we optimized the gate resistor. Proposed method is that optimized the gate resistor suitable for the inverter and motor. The simulation and experimental results show that the spike voltage and Conduced EMI noise can be reduced without the additional circuit.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.04a
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• pp.241-244
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• 2008

This study focused on the checking of design guideline using concept of reference plane as a promoting tool in order to apply to practical affair in relation to material standardization in housing build. For this purpose, we above all defined the role of reference plane. After establishing structural type can correspond to planning module of building components and coordination condition, we did exemplicated the sub-detail of building components which be to detach according to design method using the concept of reference plane that be complexed with spacial territory and replace cycle of building component or material.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.525-527
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• 2005

The LED light source has many excellent advantages for the application of LCD backlight module. As we know, the operational temperature can significantly influence the characteristics of LEDs. Heat can decrease LED's output light intensity and make its dominant wavelength (${\lambda}d$) drift. These two factors make display's color temperature change and induce different NTSC results. Here, we perform an important relation between NTSC and the above two factors of LED-LCD display.

• Korean Membrane Journal
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• v.1 no.1
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• pp.59-64
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• 1999

A theoretical and experimental study made in order to determine the performance of mem-brane contactors in water carbonation is presented. In particular on the basis of experimental results pre-viously obtained it has been derived an expression in which the effect of some parameters as temprera-ture water and {{{{{CO }_{2 } }}}}} flow rate {{{{{CO }_{2 } }}}}} pressure trans-membrane pressure on the performance of the process is taken into account. The study refers to hollow fiber membrane contactors used for the experimental tests. The main scope has been to verify if by membrane contactors it is possible to reach the same de-gree of water carbonation as by trditional methods (1-5 g/1) and to derive for the module used a cor-relation able to describe the performance of the process at several operating conditions. The high {{{{{CO }_{2 } } }}}} removal observed confirms the interesting potentialties of membrane contactors also in gas streams purification.

• Proceedings of the IEEK Conference
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• 2000.07b
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• pp.1119-1122
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• 2000

This paper describes on RF circuit simulation technique, especially on a RF modeling and a model extraction of a LDMOS(Lateral Diffused MOS) that has gate-width (Wg) dependence. Small-signal model parameters of the LDMOSs with various gate-widths extracted from S-parameter data are applied to make the relation between the RF performances and gate-width. It is proved that a source inductance (Ls) was not applicable to scaling rules. These extracted small-signal model parameters are also utilized to remove extrinsic elements in an extraction of a large-signal model (using HP Root MOSFET Model). Therefore, we can omit an additional measurement to extract extrinsic elements. When the large-signal model with Ls having the above gate-width dependence is applied to a high-power LDMOS module, the simulated performances (Output power, etc.) are in a good agreement with experimental results. It is proved that our extracted model and RF circuit simulation have a good accuracy.

• Journal of the Korean housing association
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• v.15 no.3
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• pp.11-19
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• 2004

The purpose of this study is to explain the tectonic characteristics of 'Kan' which is an unit of composition in the head residence of Uisong Kims. Here, the 'Kan' is assumed as a conceptual framework to organize a house and also a maneuvering tool to control the spatial order with relationship between the whole and the part. Not limited to the simple conceptual aspects, but the interrelated elements such as the site conditions, modules, functions, structure and aesthetic factors. Through the process of the study, the role of 'Kan' is proved to be a tectonic tool for self-regulating architectural order by relation matrix of elements. 'Kan' is not only a fixed measuring tool for functions and material of a house but also a flexible device to control the building composition. 'Kan' is certainly a relative subject for measurement of form, space and aesthetic quality.

• Proceedings of the KIEE Conference
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• 2005.10c
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• pp.241-243
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• 2005

This paper describes development of intelligent solid insulated switchgear for next generation distribution line. Nowadays, for switchgear, increased to substitute eco-friendly environment and smart ability. In relation to a project to development of intelligent solid insulated switchgear, a comparison of insulation for substitution insulation medium, to show a composition of intelligent solid Insulated switchgear and valuation on characteristics for each of module.

• Korean Journal of Mathematics
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• v.28 no.4
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• pp.699-715
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• 2020

In this paper, we give estimates of the Hankel determinant H₂(1) in a novel class 𝓝 (𝜀) of analytical functions in the unit disc. In addition, the relation between the Fekete-Szegö function H₂(1) and the module of the angular derivative of the analytical function p(z) at a boundary point b of the unit disk will be given. In this association, the coefficients in the Hankel determinant b₂, b₃ and b₄ will be taken into consideration. Moreover, in a class of analytic functions on the unit disc, assuming the existence of angular limit on the boundary point, the estimations below of the modulus of angular derivative have been obtained.