• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.11a
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• pp.337-338
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• 2008

We have studied electro-optic characteristics of a high performance liquid crystal display using Fringe In-plane field Switching (FIS) mode. The strong electric fields cause more liquid crystals to reorient almost in plane above and between the pixel electrodes. As a result, the operation voltage is lower and transmittance is higher than those of Fringe Field Switching (FFS) and In-Plane Switching (IPS) modes. Apparently, the transmittance depends on voltage applied at the configurations of FIS mode which are proposed. Therefore, we have studied certain length of between electrodes for maximum transmittance and light intensity.

• Journal of the Korean Society of Tobacco Science
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• v.8 no.1
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• pp.13-21
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• 1986

The fragility, which express the fineness index, increased linearly with the moisture content for various tobacco shreds and showed a high correlation to the moisture content. Then, fineness index (FIs) at reference moisture content(l2.5%) was obtained by following equation. FIs=FIm+A(12.5-Mm) A" denote the gradient of simple linear regression equation between the fineness index and moisture content. FIm; the fineness index measured at the standard moisture content(12.5%). The characteristics of fragility concerning with some kinds of tobacco raw materials, stalk position, moisture content and storaged time were investigated. The following results were obtained. 1. The moisture content range of less fragile of tobacco raw material was from 16% to 20%. whereas the rolled process sheet tobacco was from 12% to 16%. 2. The Bright yellow and the paper process sheet tobacco were less fragile than that of the other tobacco raw materials. 3. The leaves were more distant from middle stalk position, and its become more fragile. 4. Physical properties of the storaged tobacco leaves were determined as a function of each storageunction of each storage time. The long-term storaged leaves(more than 3 years) were slightly lighter weight, more fragility and lower equilbrium moisture content than thos of the mid-term storaged leaves.(less than 3 years). 5. Contents of chemical component of the storaged leaves were determined every storage time. The long-term storaged leaves were slightly lower content of nicotine and chlorine than those of mid-term storaged leaves, but contents of crude fiber, total ash and calcium were increased significantly.

• Journal of the East Asian Society of Dietary Life
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• v.22 no.2
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• pp.199-207
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• 2012

Many factors influence food choices and many studies show personal traits that influence food choices, which can be called food neophobia and food involvement. For example, an individual's food-related tastes are thought to certainly influence personal food choices. This study aimed to determine food choice motives, the food neophobia scale (FNS) and food involvement scale (FIS) of Asians staying in or leaving Korea, and the relationship of those personal traits and food choice motives. Subjects (N=370) completed a questionnaire consisting of food choice motives (15 questions), FNS (10 questions), FIS (12 questions) and socio-demographic conditions (10 questions). Items were analyzed to determine the differences according to nationality using ANOVA. Factor analysis and reliability analysis were conducted to identify the indicators of food choice motives. And correlation analysis was conducted to confirm the relationship between food choice motives and food neophobia / food involvement. The result of analysis suggests that food neophobia and food involvement affect food choice motives and that food choice motives are unique to ethnicity and culture.

• Journal of Power Electronics
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• v.8 no.2
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• pp.181-191
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• 2008

The task performed by induction motors grows increasingly complex in modern industry and hence improvements are sought in the field of fault diagnosis. It is essential to diagnose faults at their very inception, as unscheduled machine down time can upset critical dead lines and cause heavy financial losses. Artificial intelligence (AI) techniques have proved their ability in detection of incipient faults in electrical machines. This paper presents an application of AI techniques for the detection of inter-turn insulation and bearing wear faults in single-phase induction motors. The single-phase induction motor is considered a proto type model to create inter-turn insulation and bearing wear faults. The experimental data for motor intake current, rotor speed, stator winding temperature, bearing temperature and noise of the motor under running condition was generated in the laboratory. The different types of fault detectors were developed based upon three different AI techniques. The input parameters for these detectors were varied from two to five sequentially. The comparisons were made and the best fault detector was determined.

• Earthquakes and Structures
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• v.22 no.1
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• pp.53-64
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• 2022

This study proposes an intelligent semi-active isolation system combining a variable-stiffness control device and ground motion characteristic prediction. To determine the optimal control parameter in real-time, a genetic algorithm (GA)-fuzzy control law was developed in this study. Data on various types of ground motions were collected, and the ground motion characteristics were quantified to derive a near-fault (NF) characteristic ratio by employing an on-site earthquake early warning system. On the basis of the peak ground acceleration (PGA) and the derived NF ratio, a fuzzy inference system (FIS) was developed. The control parameters were optimized using a GA. To support continuity under near-fault and far-field ground motions, the optimal control parameter was linked with the predicted PGA and NF ratio through the FIS. The GA-fuzzy law was then compared with other control laws to verify its effectiveness. The results revealed that the GA-fuzzy control law could reliably predict different ground motion characteristics for real-time control because of the high sensitivity of its control parameter to the ground motion characteristics. Even under near-fault and far-field ground motions, the GA-fuzzy control law outperformed the FPEEA control law in terms of controlling the isolation layer displacement and the superstructure acceleration.

• Journal of Embryo Transfer
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• v.19 no.3
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• pp.283-289
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• 2004

This study was conducted to determine the effects of incubation time after cooling on mouse meiotic spindle and chromosome alignment and the optimal incubation time for their restoration. Oocytes at the metaphase II were obtained from superovulated mice. Control oocytes were held at 37$^{\circ}C$ during the experiment. Oocytes were rapidly cooled to $0^{\circ}C$, held for 30 minutes, warmed and incubated at 37$^{\circ}C$ for 5, 15, 30, 60 and 120 minutes, respectively. The morphological features of spindle and chromosomes in oocytes were evaluated by immunofluorescent staining. Meiotic spindle of control oocytes exhibited a normal-looking bipolar configuration(barrel-shaped) and highly fluorescent microtubles. The chromosomes were clustered in a discrete bundles at metaphase plate. Disassembly of meiotic spindle and chromosome dispersion were occurred immediately after chilling of oocyte. Fluorescence intensity index(FIS), normal chromosomes aligned and normal spindle configuration were compared according to incubation time at 37$^{\circ}C$. Restoration of a barrel-shaped spindle and normal chromosome alignment was occurring after 5 minutes incubation at 37$^{\circ}C$, improved as a incubation time increased, and decreased gradually after 120 minutes incubation(P<0.05). The optimal incubation time for restoration of meiotic spindle and chromosomes in cooled oocytes was 60 minutes.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.4
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• pp.518-524
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• 2011

This paper presents a study on the calibration of accelerometer data in the gyroscope free inertial navigation system(GFINS) using fuzzy inference system(FIS). The conventional INS(inertial navigation system) which can measure yaw rate and linear velocity using inertial sensors as the gyroscope and accelerometer. However, the INS is difficult to design as small size and low power because it uses the gyroscope. To solve the problem, the GFINS which does not have the gyroscope have been studied actively. However, the GFINS has cumulative error problem still. Hence, this paper proposes Fuzzy-GFINS which can calibrate the data of an accelerometer using FIS consists of two inputs that are ratio between linear velocity of the autonomous ground vehicle(AGV) and the accelerometer and ratio between linear velocity of the encoders and the accelerometer. To evaluate the proposed Fuzzy-GFINS, we made the AGV with Mecanum wheels and applied the proposed Fuzzy-GFINS. In experimental result, we verified that the proposed method can calibrate effectively data of the accelerometer in the GFINS.

• The Bulletin of The Korean Astronomical Society
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• v.26 no.1
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• pp.56-56
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• 2001

• The Bulletin of The Korean Astronomical Society
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• v.27 no.2
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• pp.56-56
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• 2002

• The Bulletin of The Korean Astronomical Society
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• v.26 no.2
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• pp.56-56
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• 2001