Objectives : This study was conducted to investigate the management status of extramural herbal dispensary facility, which could serve as a foundation for further research and policy establishment.Method : According to herbal dispensary data collected by Ministry of Health and Welfare, 78 sites were confirmed among 1,160 sites which checked extramural herbal dispensary facility. We carried out a survey on them. The survey consisted of 42 questions including general provisions, personnel management, spaces and facilities, equipment and utensils, procedure requirement for production and/or processing.Results : From their responses, hygiene was regarded generally admittable. In personnel management, some answers that herbal medicines were prepared not by Korean medicine doctor or pharmacist, but by general worker.On preparation method, dosage frequency and volume were different among preparation facilities. Regarding facility management, prescription inspection was substantially carried out in many extramural preparation facilities, however, some of them was not.
A PWM power conversion system connected to a grid through parallel-combined LCL filter is proposed in this paper. The system has four inverters paralleled and operates with PWM using 4-phase carrier for powering up and performance improvement. Four LCL filters have four separate filter inductors connected to individual inverters and one common LC filter which is composed of a filter capacitor and a grid inductor. The differential mode current circulates only through four inverters and four filter inductors. The differential mode current is completely eliminated from the filter capacitor and the connected power grid. Accordingly, performance improvement can be achieved since the current in the filter capacitor is reduced and the harmonic current into a grid is reduced. An 1.3kW single phase prototype system has been constructed and tested, and the proposed system has been verified.
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