Abstract: A chitosan enhanced erosion control device is described. A walled elongated core member is disclosed having a first open end, a second end, an interior space and one or more openings in the wall communicating the interior space with the exterior of the core member. An outer filter member surrounds the core member. One or both the first and second ends of the core member can be open. One or both of the open ends can comprise couplers or connectors for connecting one core member to one or two complimentary core members. The core member may comprise a flexible plastic pipe, such as high-density polyethylene pipe having a plurality of perforations. Chitosan may be added to one or more device elements to assist in removing unwanted silt and contamination from passing fluid.

Abstract: A carrying case for portable communication devices employing vibrations to signal incoming messages or calls is disclosed. The case includes within it an exterior facing metallic member and an interior facing retaining member. The retaining member urges the communication device against the metallic portion, thereby aiding in transmitting the vibrations from the interior of the carrying case to the exterior of the carrying case to enhance the ability of the user to detect the vibration signally an incoming message or call.

Abstract: The present invention relates to methods of monitoring, via polymerase chain reaction, the clinical progression of human immunodeficiency virus infection and its response to antiretroviral therapy. According to the invention, polymerase chain reaction assays may be used to predict immunological decline and to identify, at an early stage, patients whose infection has become resistant to a particular antiretroviral drug regimen.