• Journal of Institute of Control, Robotics and Systems
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• v.13 no.5
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• pp.422-428
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• 2007

This paper presents a neural network based adaptive control approach to a reconfigurable flight control law that keeps handling qualities in the presence of faults or failures to the control surfaces of an aircraft. This approach removes the need for system identification for control reallocation after a failure and the need for an accurate aerodynamic database for flight control design, thereby reducing the cost and time required to develope a reconfigurable flight controller. Neural networks address the problem caused by uncertainties in modeling an aircraft and pseudo control hedging deals with the nonlinearity in actuators and the reconfiguration of a flight controller. The effect of the reconfigurable flight control law is illustrated in results of a nonlinear simulation of an unmanned aerial vehicle Durumi-II.

• Journal of international Conference on Electrical Machines and Systems
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• v.1 no.2
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• pp.53-57
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• 2012

The mathematical model of a three-phase voltage source pulse-width modulation (PWM) DC/AC inverter is non-linear, and in view of the traditional linear control strategy it can not meet the requirements of designing a high-performance inverter. What's more, when the loads are not pure resistive loads, the inverter further requires that the controller possess high-performance. This paper proposes a nonlinear control strategy for the inverter called Passivity-based Control. We can alter the inverter model in three-phase abc coordinate to two-phase synchronous rotating dq coordinate for establishing the port-control Hamiltonian (PCH) model for this system. We can control the distribution of energy in the system to achieve the control aim. Simulation results show that the passivity-based control method can make this system possess a level of high-performance that is both robust and dynamic.

• Journal of the Korean Society of Food Science and Nutrition
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• v.24 no.4
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• pp.625-630
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• 1995

This study was conducted to develop pumpkin-citron-honey(PCH) drink. The product is made fro natural ingredients : pumpkin, citron and honey. It does not contain any kind of food additives. It's characteristics and effectiveness are as follows. The product is a water soluble pumpkin(WSP) paste from natural ingredients only. It is easily soluble in water, and becomes a PCH drink with a good taste and a beautiful color. Dried pumpkin powder and dried WSP paste powder contain β-carotene which contents are 1/3 of total carotenoids. The result of sensory evaluation of WSP paste and PCH drink showed good response to number of people.

• Resources Recycling
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• v.13 no.1
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• pp.59-67
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• 2004

A universal plasma-chemical module (PChM) for the industrial processing of different hydrocarbon raw material pyrolysis was designed and tested. Laboratory investigations for the plasma-chemical method of acetylene production from natural gas and different coals were made. Similar laboratory tests on the industrial production of acetylene as a raw material for organic syn-thesis were developed using the PChM. A comparison of the suggested plasma-chemical method with the traditional process of acetylene production were carried out. The outlook of the plasma-chemical method was shown.

• Korean Journal of Microbiology
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• v.31 no.2
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• pp.129-134
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• 1993

The pchAB genes of Pseudomonas sp. DJ-12 produce the enzymes of 4-chlorobipheny] (4CB) dioxygenase and dihydrodiol dehydrogenase which act on the first and second steps in degradation of 4CB and biphenyl. The genes were cloned in E coli XLI-Blue. The pcbAB genes of about 2.2 kb in size were contained in the pCUlO1 hybrid plasmid in the cloned cell of CUIOI. The genes were found to have their own promoter and three restriction sites for HindlII. 2,3-dihydroxybiphenyl was detected by the resting cell assay, as the metabolite transformed from biphenyl by the cloned cell of CUIOI. This means that the pcbAB genes are well expressed in E. coli. But dechlorination was unlikely involved in the pchAB gene expression but was believed to occur by functioning on 4CBA produced after ring-cleavage of 4CB.

• Journal of the Korean Chemical Society
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• v.25 no.5
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• pp.311-317
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• 1981

A new nickel(II) compound, $Ni(CH_2SiMe_3)_2((C_6H_5)_2PCH_2CH_2P(C_6H_5)_2)$, 1, has been prepared by the reaction of $NiCl_2((C_6H_5)_2PCH_2CH_2P(C_6H_5)_2)$ with $Me_3SiCH_2Li$. The compound, 1, is stable under nitrogen at room temperature both in solution and in the solid state. Thermal decomposition of 1 in solution or in the solid produces the reductive coupling product, $Me_3SiCH_2CH_2SiMe_3$ which is also afforded by the reactions of 1 with CO and $O_2$ at room temperature, and with $(C_6H_5)_2PCH_2CH_2P(C_6H_5)_2$ at 80${\circ}$C.

• The Journal of Korean Medicine
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• v.26 no.3 s.63
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• pp.124-134
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• 2005

Objectives : This study was peformed to evaluate the actual state and the effects of Smoking Prevention or Stop-Smoking Programs (Sp/SSP) for middle school students and to confirm students' needs for Oriental Medical Treatments (OMT) in SP/SSP. Methods : Thirty-nine middle school students who took part in the SP/SSP of the Public Health Center (PHC) in July 2004 answered the questionnaire. There were twenty students in $PHC{\alpha}$, and 19 students in $PHC{\beta}$. Resillts : 1. At the elementary school, SP/SSP is not enough, compared with middle school (p=.000). 2. Subjects preferred tile documents from PCH to those from school $(PCH{\alpha}: p-value=.002,\;PCH{\beta}: p-value=.004)$ 3. There was no mention of OMT in school SP/SSP. 4. The degree of thinking about need of teaming OMT in SSP has a positive correlationship (p-value=.000) with intention to be treated with auricular acupuncture therapy. Results : The SP/SSP for middle-school students must be improved to be more active, more experimental and more individual. Also, a more various, positive approach in OMT is required toward the Stop-Smoking Program.

• Bulletin of the Korean Chemical Society
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• v.19 no.12
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• pp.1380-1381
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• 1998

• International Journal of Control, Automation, and Systems
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• v.1 no.3
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• pp.315-320
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• 2003

This paper presents a control augmentation system (CAS) based on the dynamic model inversion (DMI) architecture for a highly maneuverable aircraft. In the application of DMI not treating actuator dynamics, significant instabilities arise due to limitations on the aircraft inputs, such as actuator time delay based on dynamics and actuator displacement limit. Actuator input saturation usually occurs during high angles of attack maneuvering in low dynamic pressure conditions. The pseudo-control hedging (PCH) algorithm is applied to prevent or delay the instability of the CAS due to a slow actuator or occurrence of actuator saturation. The performance of the proposed CAS with PCH architecture is demonstrated through a nonlinear flight simulation.

• Electrical & Electronic Materials
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• v.9 no.3
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• pp.265-269
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• 1996

We have studied the effect of the mesogenic core of nematic liquid crystals (NLCs) for polar (out-of-plane tilt) anchoring strength and surface order parameter on rubbed polyimide (PI) surfaces. The order of polar anchoring strength for NLCs on rubbed PI surfaces is 5CB > PCH5 > CCH5. From the above results, we suggest that the polar anchoring strength depends on the polarizability of the NLCs. The surface order parameter for NLCs is 5CB > PCH5 > CCH5 on rubbed PI surfaces. We conclude that the polar anchoring strength is strongly related to the surface order parameter on rubbed PI surfaces.