Abstract: An opening and shutting apparatus for a flow control to adjust a fluid flow inside a duct, especially, in which a kinematical structure is used, and so the sum of the moment acting on the knob on closing-up the inside of the duct is forced to come to zero, so that the inside of the duct can be stably closed up without special locking projection or spring, etc.

Abstract: An opening/shutting apparatus for flow control includes a damper door that opens/shuts a fluid channel of an interior of a duct, a knob that adjusts the damper door, a link coupled to an end of the damper door, and a rod hinged with both the knob and the link, the rod transmitting a rotational force of the knob to the link. The rod is configured to have a hinged structure where one end thereof is hinged with the link and the other end is hinged with the knob, and, when the interior of the duct is hermetically sealed, a rotational center of the knob is placed on a straight extension line connecting respective hinged points of the rod.

Abstract: A method of effectively testing whether a service bundle operates by changing the configuration and function of bundles included in a test tool for an OSGi service platform and a test tool using the method are provided. The OSGi service platform test tool includes a framework in which test cases are installed, an adaptor enabling the framework to function in a test execution environment, a director bundle providing a UI of a test tool, services that manage the test, and OSGi services, and an agent bundle relaying message movement with the test case bundle to a framework of a target host.

Abstract: A panel-type speaker mounting structure is provided. In the mounting structure, an LCD window is exposed on the top end of an upper casing frame of a main body. An LCD module is disposed under the LCD window with a gap between the LCD module and the LCD window within the main body, and the LCD module has a polarizing plate divided into a first portion corresponding to the LCD window and the LCD module has a second portion extended from the first portion, for mounting a panel-type speaker.