• 반도체디스플레이기술학회지
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• 제10권3호
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• pp.1-6
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• 2011

In this paper, the IC(Integrated Circuit) for multi-channel synchronous communication was designed by using FPGA and VHDL language. The existing chips for synchronous communication that has been used commercially are composed for one to two channels. Therefore, when communication system with three channels or more is made, the cost becomes high and it becomes complicated for communication system to be realized and also has very little buffer, load that is placed into Microprocessor increases heavily in case of high speed communication or transmission of high-capacity data. The designed IC was improved the function and performance of communication system and reduced costs by designing 8 synchronous communication channels with only one IC, and it has the size of transmitter/receiver buffer with 1024 bytes respectively and consequently high speed communication became possible. It was designed with a communication signal of a form various encoding. To detect errors of communications, the CRC-ITU-T logic and channel MUX logic was designed with hardware logics so that the malfunction can be prevented and errors can be detected more easily and input/output port regarding each communication channel can be used flexibly and consequently the reliability of system was improved. In order to show the performance of designed IC, the test was conducted successfully in Quartus simulation and experiment and the excellence was compared with the 85C3016VSC of ZILOG company that are used widely as chips for synchronous communication.

• 한국치위생학회지
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• 제11권4호
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• pp.595-602
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• 2011

Objectives : This study purpose were the effect of toothbrushing for decreasing halitosis for gingivitis and periodontitis patients. Methods : The university staffs were examined oral condition and analysised a change of oral health state score after using 3 types of toothbrushing. Results : The results were as followed : OHI-S shows that the decreasing effect takes place in the M. bass method and Tooth pick method, but shows no differences by each method. GI for Self test method shows decreasing effect after 2nd week during education while the M. bass method and Tooth pick method shows after 1st week during education. The M. bass method shows much greater effect of halitosis amongst 3 kind of method. PI for Self test method and Tooth pick method show decreasing effect. Decreasing effect during education shows until 2nd week by 3 kind of method, but it shows no differences after 3rd week. VSC(ppb) for M. bass method and Tooth pick method show decreasing effect. Decreasing effect during education shows after 3rd week by 3 kind of method, but it shows no differences until 2nd week. PHP for Self test method, M. bass method and Tooth pick method show decreasing effect after 2nd week during education. But, there is no differences of decreasing effect by among 3 kind of method. Conclusions : This study reports that it is necessary to carry outt further studies on the improvement of oral health management of adults based on the development of oral health education.

• Journal of Ginseng Research
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• 제33권4호
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• pp.367-377
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• 2009

구강악취 원인 물질인 $H_2S$를 발생시키는 NaHS로 RAW 264.7 세포를 자극시킨 결과, VSCs 생성에 관련된 CSE 유전자 발현증가와 함께 IL-6, COX-2, iNOS와 같은 염증매개 cytokine이 증가하며, 아울러 본 대식세포나 백혈구 활성에 관련된 세포내 골격단백질인 ERM의 발현증가가 유도되었다. 이러한 사실은 이전의 연구결과인 VSCs의 생성이 위점막 염증 및 손상과 연관되어 있다는 이전의 연구를 증빙해주는 사실인데, 더욱 흥미로운 사실은 고려 홍삼의 전처치를 통하여 CSE의 억제는 물론 염증 연관 cytokine 및 ERM의 발현억제를 유도할 수 있으며, 이는 세포내 신호전달계인 p38 및 ERK의 억제, 주로는 ERK 비활성화를 통하여 작동됨을 규명하였다. 고려홍삼이 구강악취 환자에게서 증상 완화내지는 소멸을 위하여 매우 유용하다는 이전의 연구결과에 본 연구결과가 추가됨으로 고려홍삼에 의한 VSC 생성억제 기전이 관련된 유전자의 약화는 물론 cytokine 억제 및 백혈구 활성에 관련된 인자억제를 통한 항염증 작용에 근거한다는 기전을 추가할 수 있었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.999-1004
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• 2005

An algorithm for a hybrid controller consists of a sliding mode control part and a fuzzy logic part which ar purposely for nonlinear systems. The sliding mode part of the solution is based on "eigenvalue/vector"-type controller is used as the backstepping approach for tracking errors. The fuzzy logic part is a Mamdani fuzzy model. This is designed by applying sliding mode control (SMC) method to the dynamic model. The main objective is to keep the update dynamics in a stable region by used SMC. After that the plant behavior is presented to train procedure of adaptive neuro-fuzzy inference systems (ANFIS). ANFIS architecture is determined and the relevant formulation for the approach is given. Using the error (e) and rate of error (de), occur due to the difference between the desired output value (yd) and the actual output value (y) of the system. A dynamic adaptation law is proposed and proved the particularly chosen form of the adaptation strategy. Subsequently VSC creates a sliding mode in the plant behavior while the parameters of the controller are also in a sliding mode (stable trainer). This study considers the ANFIS structure with first order Sugeno model containing nine rules. Bell shaped membership functions with product inference rule are used at the fuzzification level. Finally the Mamdani fuzzy logic which is depends on adaptive neuro-fuzzy inference systems structure designed. At the transferable stage from ANFIS to Mamdani fuzzy model is adjusted for the membership function of the input value (e, de) and the actual output value (y) of the system could be changed to trapezoidal and triangular functions through tuning the parameters of the membership functions and rules base. These help adjust the contributions of both fuzzy control and variable structure control to the entire control value. The application example, control of a mass-damper system is considered. The simulation has been done using MATLAB. Three cases of the controller will be considered: for backstepping sliding-mode controller, for hybrid controller, and for adaptive backstepping sliding-mode controller. A numerical example is simulated to verify the performances of the proposed control strategy, and the simulation results show that the controller designed is more effective than the adaptive backstepping sliding mode controller.

• 생명과학회지
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• 제23권3호
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• pp.443-447
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• 2013

본 연구는 오미자 추출물의 구강병원균에 대한 항균활성과 항구취 효과를 조사하기 위해 수행되었다. 오미자 MeOH 추출물이 열수추출물에 비해 구강병원균에 대한 항균활성이 더 뛰어난 것으로 나타났다. 특히 MeOH 추출물의 EA 분획물은 Streptococcus mutans, S. sanguinis, S. salivaris subsp. thermophols 그리고 Porphyromons gingivalis에 대한 활성이 뛰어난 것으로 조사되었다. 오미자 2% MeOH 추출물의 항구취 효과를 oral chroma를 이용한 실제실험에서 측정한 결과, 황화수소, 메틸머캅탄 그리고 황화디메틸을 각각 91.15, 78.72 그리고 71.58% 감소시키는 것으로 측정되었다. 본 연구 결과, 오미자 추출물은 몇몇의 구강병원균에 대한 항균활성을 보였고 휘발성 화합물을 억제하는 효과가 뛰어난 것으로 나타났다. 그러므로 오미자의 추출물은 항균용 합성약품과 구강위생용품을 대체할 수 있는 소재로 판단된다.