Abstract: In an apparatus for filtering gases with a closed container which is divided by a horizontal perforated plate into a lower compartment provided with a gas inlet and an upper compartment provided with a gas outlet, and with tubular or candle-shaped filter elements which are sealingly suspended in holes of the perforated plate and are supported by a flange-type enlargement at their upper end on the perforated plate, in order to also ensure reliable sealing during swivel motion of the filter elements relative to the perforated plate, it is proposed that the flangetype enlargement form a bearing surface which lies on the surface of a sphere with center point above the bearing surface and on the vertical center axis of the filter element, and that the hole in the perforated plate so surround at a distance the filter shell of the filter element downwardly adjoining the enlargement that the filter element can swivel over a certain angular range about the center point of the sphere.

Abstract: A method and system for automatic detection of cells and determination of cell features from cytological smear preparations which can recognize cells and extract their features independently of known visual cell descriptions through digital classification in a data processing system confines evaluation of the cell to the cell nuclei.

Abstract: A solar cell arrangement with an associated optical collecting lens system. The lens system focuses a light impingement area onto the solar cell to intensify incident radiation. The collecting lens system includes an optically active layer provided between the light impingement area and the solar cells. The optically active layer images and disperses the incident light in a manner adapted to the surface and light absorption characteristics of the solar cells.