Abstract: A system for selectively opening and closing a ventilation opening in a window glass panel. The system includes a shield gasket and a ring-shaped fixing frame inserted into the opening, with the gasket interposed between the opening and the fixing frame. A cover is inserted into the fixing frame to open and close the ventilation opening. Fixing frame alternatives include wherein the fixing frame comprises a drain structure, an exterior gutter, a filter, and peripheral elastic support hooks. Shield gasket alternatives include wherein a body part transforms into a cylindrical shape during installation of the fixing frame, and wherein a wall part comprises a circumferential elastic protruding part forming an inner space part therein. Cover alternatives include wherein the cover includes ring shaped shielding walls and a hook to engage fixing frame insertion groove.

Abstract: Provided is an indoor ventilation system which can ventilate an indoor space even without opening a glazed window. A ventilation window includes an opening which is formed through a glass plate thereof and can be opened or blocked. In the system, only a space corresponding to the opening is open to the outside so as to ventilate an indoor space without a glazed window, an open area of the opening is narrow so as to be secure against outside invasion and a falling accident, and a perimeter of a frame is short so as to minimize energy loss.

Abstract: Embodiments of the disclosed technology provide reliable and fast communication of a human through a direct brain interface which detects the intent of the user. An embodiment of the disclosed technology comprises a system and method in which least one sequence of a plurality of stimuli is presented to an individual (using appropriate sensory modalities), and the time course of at least one measurable response to the sequence(s) is used to select at least one stimulus from the sequence(s). In an embodiment, the sequence(s) may be dynamically altered based on previously selected stimuli and/or on estimated probability distributions over the stimuli. In an embodiment, such dynamic alteration may be based on predictive models of appropriate sequence generation mechanisms, such as an adaptive or static sequence model.