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HC-06 Bluetooth based driver module for emergency LED Multi-Directional Indicator
정준석,권종만,비투무키자 조셉,정순호,이민우,차재상 사단법인 한국위성정보통신학회 2017 한국위성정보통신학회논문지 Vol.12 No.1
In this paper we present the search on HC-06 Bluetooth based driver module for emergency LED Multi-Directional Indicator. Nowadays, a growing trends in which electronic displays such as LED, LCD or plasma monitors are being installed in public places like bars, stores, entertainment areas, restaurants, lobbies, etc. In this paper, the study is curried out on efficiency of HC-06 Bluetooth module based controller driver that relates generally to the field of emergency signage management systems for displaying various indicator contents remotely on electronic displays in public and privates venues. It allows user smart devices interaction remotely with digital signage by providing content for displaying on at least one display in a venue. Depending on the emergency case, HC-06 Bluetooth based driver module proves the high efficiency as well as good performance of processing and communicating remotely the indicator based message that is displayed from a venue management control system by using smart devices. The system combines smart device that linked to HC-06 Bluetooth module with ATmega168/328 embedded micro controller which result by switching the displayer containing the digital signage indicator based message.
정준석,박정응 한국수자원학회 1973 한국수자원학회논문집 Vol.6 No.2
The coefficient of the current meter generally determined by the maker Its coefficient is subject to being changed with time. Therefore the coefficient of the current meter has to be checked up before it is ready to be used Such an inspection is termed a current meter rating The current meter equipped an electronic apparatus and all the others are to be rated in a rating flume. The price current meter which is most widely used for measuring flow velocities ranging between 0.3m/sec and 3.5m/sec has been used in this study. The length of the flume and the optimum range of the rating in the cross section are determined in the range of 20∼120cm deep, 50∼160cm wide of the flume. In this study, the 23 different kinds of the current meter rating enabled us to determine the constants a and b of the following equation. V=an+b(m/sec) where, n is number of revolution per second(n=N/T) V is velocity(v=D/T) The above constant can be determined by the least squares method and plotting, using the velocity(V=D/T) and the number of revolution per second(n=N/T) obtained from the running distance(D), time(T), the number of revolutin(N), and the running number(m). From the experiments the following conclusions are drawn: 1) The rating flume is large enough if the flume is 110∼120cm deep, and 40∼50m long. 2) The optimum depth for rating of a current meter is in the range of h=40∼50cm.
정준석,임국창 한국수자원학회 1973 한국수자원학회논문집 Vol.6 No.1
Presented is the results of a model study about scouring around a bridge pier. 24 different types of piers were inestigated for the depth and width of scouring. The grain size of sand used in the experiment ranges from 0.149 to 2, 380mm, The time required to reach the stable bed formation was about 30min, with the range of Froud number from 0.58 to 0.69. It has been found that the scouring is most severe at the frontal side of the pier and decreases with decreasing a contact angle (between the center line of the pier and tangent to the frontal face). For design purposes, it is recomanded that the contact angle at the frontal face is 25 degrees for a triangular type and 40 deyrees for a circular type respectively.
스마트폰 기반의 신뢰성 있는 Push Notification 미들웨어 및 모듈 개발
정준석,김태용,Jung, Joon-Seok,Kim, Tae Yong 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.3
Push Notification Service technology is to provide platform competition rather than unit-based technology. In Korea, only the type of a service using the technology provided by this main platform has been studied and the study of the based technology has not been developed consistently. In this paper, new types of Push Notification Service capable of domestic technology acquisition was proposed and designed. Push Notification Service 기술은 단위 서비스가 아닌 플랫폼 경쟁을 위한 기반 기술이다. 국내에서는 이러한 메인 플랫폼에서 제공하는 기술을 기반으로 한 서비스 형태만이 연구되고 개발되고 있는 실정이며 기반 기술에 대한 연구는 지속적으로 이루어지지 못하고 있다. 본 연구에서는 국산 기술 확보 차원에서 새로운 형태의 Push Notification System을 제안하고 설계하였다.