• Korean Journal of Human Ecology
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• v.15 no.4
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• pp.631-646
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• 2006

The purpose of this study is to find out its effect on wearers' impression formated by combination of their body type with neutral tone clothing. The experimental materials developed for this study are a set of responses to stimulus in scales(7-point semantic). 45 pictures used as stimulus are, through computer simulation, manipulated to five wearers' body type and nine neutral tone wear. The subjects are 276(?) female undergraduate students in Kyung-nam area. Factors on wearers' impression suggested as responses to the stimulus consist of 5 different demensions (Tenderness, Cuteness, Attractiveness, Elegance, Intrepidity). The results of this study are as follows: first, combination of their body type with neutral tone wear significantly affects the formation of wearers' impression in the factor of Tenderness, Attractiveness, and Intrepidity (?); to the factor of Attractiveness, wearers' body type is rather more related than wearers' neutral tone wear is. Second, the harmony of their body type with neutral tone wear has a significant effect on wearers' impression in the factor of Cuteness. According to those results, the combination of wearers' body type with neutral tone wear has significant effects on the formation of wearers' impression.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.9_10 s.146
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• pp.1207-1218
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• 2005

The purpose of this study is to find out the effect of wearer's body type and clothing type, neutral tone combination on impression formation. The experimental materials developed for this study are a set of stimuli and response scales(The 7-point semantic). the stimuli are 90 pictures manipulated with wearer's body type, clothing type and neutral tone variation by computer simulation. The subjects are 540 female undergraduate students in Kyung-nam. The resulte of this study are as follows : Impression factor of the stimulus consisted of the 5 demensions(tenderness, cuteness, attractiveness, elegance, intrepidity). Wearer's body type had significant effects on all five factors. Especially, it had the strongest effects on attractiveness. Clothing type had significant effects on tenderness, attractiveness, intrepidity. Neutral tone combinations had significant effects on all factors except elegance. In regarding the effect of interaction between each variable, the combination of clothing type and neutral tone combination had significant effects on attractiveness, elegance, intrepidity.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.33 no.1
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• pp.8-15
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• 2001

Presence of small amount of old newsprints printed with waterbased flexographic inks leads to a significant loss brightness of the deinked pulp by flotation process. Recently there has been an increased interest in employing neutral deinking processes to solve the problems associated with waterbased flexo ink. A comparative experimental study was performed to evaluate the efficiency of neutral deinking and conventional alkaline deinking for ONP furnishes contaminated with flexo ink. It was shown that neutral deinking provides significant improvements in brightness, yield and freeness as compared with alkaline deinking. Flotation efficiency was different depending upon the type of surfactants used in neutral deinking. The result of this study showed that alcohol type surfactant is superior to fatty acid type surfactant in neutral deinking efficiency.

• Journal of the Semiconductor & Display Technology
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• v.17 no.3
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• pp.90-94
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• 2018

In this paper, we applied a three-level T-type inverter with the one more voltage level than two-level inverter. However, the three-level T-type inverter has a systematic problem with voltage unbalances. So neutral point control is essential. Therefore, the voltage unbalance problem of the three - phase inverter was confirmed to be controlled within 5V using the neutral point control algorithm in charge and discharge mode. In addition, total harmonic distortion was reduced in three phases (u phase, v phase, w phase) when neutral point control was performed in charging mode and also in three phases (u phase, v phase, w phase) in discharge mode. In this paper suggests a neutral point control algorithm to solve the voltage unbalance of a three-level T-type inverter, and shows the improvement of the performance of the proposed algorithm through experiment.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.1
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• pp.35-40
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• 2007

The one step type and two step type pole are used in distribution line. If the three phases are not balanced, the communication line can be damaged by induced voltage. This paper calculates the neutral current using KEPCO's distribution system model which is only composed by one step type pole. The used system model is modelled by using ATPDraw and the neutral current is calculated by using EMTP/MODELS. Many cases for abstracting the neutral current characteristics in KEPCO's distribution system are simulated and analyzed.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.484-485
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• 2006

The one step type pole and two step type pole are used in KEPCO's distribution system. The neutral current may occurs in three-phase four-wire distribution system due to unbalanced load. This paper presents neutral current both one step type pole and two step type pole in distribution system.

• Journal of the Korean Solar Energy Society
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• v.37 no.6
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• pp.1-12
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• 2017

The DC link of Grid-Connected 3-Phase 3-Level T-type Photovoltaic PCS (PV-PCS) consists of two series connected capacitors for using their neutral voltage. The mismatch between two capacitor characteristics and transient states happened in load change cause the imbalance of neutral voltage. As a result, PV-PCS performance is degraded and the system becomes unstable. In this paper, a mathematical model for analyzing the imbalance of neutral voltage is derived and a compensation method using offset voltage is proposed, where offset voltage adjusts the applying time of P-type and N-type small vectors. The validity of the proposed methods is verified by simulation and experiment.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.6
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• pp.1268-1273
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• 2011

The study on power capacity increase of superconducting fault current limiter (SFCL) is one of the most important researches to apply a SFCL in the power system. To achieve this, we thought that the unbalanced quenching problem generated in series connection of superconducting units should be solved. In this paper, we investigated the quenching characteristics of superconducting units in the transformer-type SFCL with or without the neutral line between secondary windings and superconducting units. In case of transformer-type SFCL without neutral line, the connection structure of superconducting units is identical to that of the resistive-type SFCL connected in series. Therefore, the unbalanced quenching was occurred by difference of critical current between superconducting units. However, in case of transformer-type SFCL with neutral line, the superconducting units with different critical current were simultaneously quenched. It was because the currents induced by secondary winding were separately flowed through the superconducting units. By these results, we confirmed that the resistances and consumption powers of the superconducting units were equally generated.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.3
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• pp.465-471
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• 2007

The one step type pole and two step type pole are used in KEPCO's distribution system. The neutral current increases in three-phase four-wire distribution system due to unbalanced load. Usually, power line and communication line are installed at contiguity by effect of topography in Korea. To this end, the damages such as electrostatic induction, electromagnetic induction and harmonic induction generated by induced voltage and current are occured in power line and communication line. This paper calculates the neutral current in KEPCO's distribution system using EMTP by composing various simulated conditions. Also, these results are verified by vector analysis.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.55 no.7
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• pp.290-296
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• 2006

If the three phases are not balanced, the current in neutral wire is not zero. Then, the induced voltage can be generated in communication line. The KEPCO's rule about unbalanced current for one step type in distribution pole is a twenty percent of phase current. But the unbalanced current for two step type in distribution pole can't decide the rule because there are many different views. This paper presents the calculation and analysis technique of neutral current in distribution poles using equivalent circuit analysis and EMTP simulation.