• Journal of Sensor Science and Technology
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• v.18 no.3
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• pp.202-206
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• 2009

Flat type catalytic combustible hydrogen sensors were fabricated using platinum micro-heaters and sensing material pastes. The platinum micro-heater was formed on an alumina substrate by sputtering method. The paste for the sensing materials was prepared using ${\gamma}-Al_2O_3$ 30 wt%, $SnO_2$ 35 wt%, and Pd/Pt 30 wt% and coated on the platinum micro-heater. The sensing performances were tested for the prepared sensors with different substrate sizes. The micro catalytic combustible hydrogen sensors showed quick response time, high reliability, and good selectivity against various gases(CO, $C_3H_8,\;CH_4$) at low operating temperature of $156^{\circ}\C$.

• Proceedings of the KSME Conference
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• 2000.04a
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• pp.475-480
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• 2000

A new positioning mechanism with Parallel type actuator using piezoelectric material and with dual type actuators using voice coil motor (VCM) and piezoactuator is proposed for optical disk drive or near-field recording type drive, and high speed position and vibration control are investigated. Parallel type bimorph piezoactuator is used as a fine motion actuator with self-sensing technique, which allows a piezoelectric material to concurrently sense and actuate in a closed loop frame work, and positive position feedback control algorithm is adopted to further control residual vibration. For positioning control of VCM, PID control algorithm is adopted.

• Proceedings of the IEEK Conference
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• 2002.07c
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• pp.1555-1557
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• 2002

We have investigated the precharge type sense amplifier, it is suitable fur voltage sensing in a NOR type single transistor ferroelectric field effect transistor (1T FeFET) memory read operation. The proposed precharge type sense amplifier senses the bit line voltage of 1T FeFET memory. Therefore, the reference celt is not necessary compared to current sensing in 1T FeFET memory, The high noise margin is wider than the low noise margin in the first inverter because requires tile output of precharge type sense amplifier high sensitivity to transition of input signal. The precharge type sense amplifier has very simple structure and can sense the bit line signal of the 1T FeFET memory cell at low voltage.

• Journal of the Korea Institute of Military Science and Technology
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• v.18 no.5
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• pp.525-531
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• 2015

In this paper, a novel impact sensing device for an ESAF(Electronic Safe and Arming Fuze) is presented. An impact sensing device is mounted in front of a weapon, and it detects an impact when it crashes against a target. There are two main design requirements to enhance the firing functional reliability of the ESAF; an operational reliability and a reduced latency, which is a delay time needed for sensing the impact. The design method of the contact-type impact sensing device, which employs an FPCB(Flexible Printed Circuit Board) so it can be used other weapons, is proposed. The tests demonstrated that the design described in this work show a reduced delay time with ensuring the operational reliability.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.05a
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• pp.318-322
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• 2001

This paper deals with sensing ability of smart sensor that has a sensing ability to distinguish materials according to surface types of smart sensor. We have developed a new signal processing method that can distinguish among different materials. The smart sensor was developed for recognition of materials. We made two types of smart sensors in our experiment. Then, we estimated the ability to recognize objects according to smart sensor type. We estimated the sensing ability of smart sensor with the $R_{SAI}$ method. Experiments and analysis were executed to estimate the ability to recognize objects according to surface types of smart sensor. Sensing ability of smart sensors was evaluated relatively through a new $R_{SAI}$ method. Applications of smart sensors are for finding abnormal conditions of objects (auto-manufacturing), feeling of objects (medical product), robotics, safety diagnosis of structure, etc.etc.

• Journal of Fisheries and Marine Sciences Education
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• v.19 no.2
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• pp.288-300
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• 2007

The study was designed to lay the ground for effective guidance toward adaptive coping behavior by finding out differences in ego-resiliency in terms of personality types in the Murphy-Meisgeier Type Indicator for Children(MMTIC). For the study, personality types and ego-resiliency of 180 fifth- and sixth-grade students from 3 elementary schools located in Busan were measured. The instrument for personality types was MMTIC, which was developed by Meisgeier and Murphy in the US in 1990 and standardized in Korea in 1993 by Jungtaek Kim and Hyesook Shim. In order to measure Ego-Resiliency, Block & Kremen(1996)'s Ego-Resiliency scale translated and remodified by Sungkyung Yoo(2004) was used. The collected data were analyzed using ANOVA. The study found the followings: Firstly, according to the children's preference for personality types, participants' ego-resiliency scores appeared significantly higher in 'Extraversion', 'iNtuition', and 'Feeling' than in 'Introversion', 'Sensing', and 'Thinking' respectively. There was no significant difference in the score between in 'Judging' and 'Perceiving'. Secondly, according to function types of MMTIC, the participants' ego-resiliency score in 'iNtuition-Feeling' type showed the highest among scores in the other three types. The score in 'iNtuition-Feeling' type was significantly higher than 'Sensing-Thinking', 'Sensing-Feeling', and 'iNtuition-Thinking' type respectively.

• Journal of the Korean Society of Safety
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• v.11 no.2
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• pp.67-78
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• 1996

Gas sensing element, $\gamma-Fe_2O_3$was synthesized by dehydration, reduction, and oxidation of $$${\gamma}$-FeOOH, which was synthesized with $FeSO_4\;{\cdot}\;7H_2O$ and NaOH. They were produced as a bulk-type, a thick film-type. Then, their responses and mechanisms of response to the gas of liquefied-petroleum were studied. The qualities of gas sensing elements are decided by the structure and the relative surface area. In the process of $\alpha-FeOOH $synthesis, the effects of reaction conditions as the equivalent ratio, on the structure and the relative surface area of gas sensing element were observed. The changes of the structure were measured with XRD, SEM, TG-DTA and BET. The resistance changes of the synthesized gas sensor in the air were measured. The response ratio were also measured for the changes of working temperature and gas concentration. As a result of analysis with XRD, it was confirmed that the the best conditions for the synthesis of $\alpha -FeOOH$ were equivalent ratio 0.65. The thick film-type element of $\gamma-Fe_2O_3$responded more quickly than the bulk-type did. The structure and the relative surface area of the $\alpha-FeOOH $were confirmed as the important factors deciding gas response charcteristics.

• Proceedings of the Korean Magnestics Society Conference
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• 2013.12a
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• pp.77-78
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• 2013

• Korean Journal of Remote Sensing
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• v.6 no.1
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• pp.11-24
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• 1990

This is the study about the meteorological satellite cloud image classification by objective methods. For objective cloud classification, linear discriminant analysis was tried. In the linear discriminant analysis 27 cloud characteristic parameters were retrieved from GMS infrared image data. And, linear cloud classification model was developed from major parameters and cloud type coefficients. The model was applied to GMS IR image for weather forecasting operation and cloud image was classified into 5 types such as Sc, Cu, CiT, CiM and Cb. The classification results were reasonably compared with real image.

• The Research Journal of the Costume Culture
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• v.14 no.4
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• pp.635-646
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• 2006

The purpose of this study was to determine if personality types affect hair style and clothing image. Personality types was applied using Myers-Briggs Type Indicator(MBTI). Subjects were 101 students at Keimyung University in Daegu, Korea. Data analysis was performed using SPSS package, which included ANOVA, t-test and ${\chi}^2-test$. The results were summarized as follows. 1. There was only significant relationship between hair style and personality type. Sensing type preferred hair wave style than intuition type. 2. There were several significant differences between clothing image and personality type. Extroversion preferred avantgarde clothing image more than introversion type. Intuition type preferred exotic and avantgarde clothing image more than sensing type. Feeling type preferred active clothing image more than thinking type. Judging type preferred elegance clothing image more than perceiving type. 3. There was significant relationship between hair style and clothing image preference by personality types in college students. Intuition type preferred exotic and avantgarde clothing image and waveless hair style.