Abstract: A vinyloxy group-containing vinyl polymer, useful as a heat or light curing reactive prepolymer, containing at least a constituent unit expressed by the following formula (I):

Abstract: A vinyloxy group-containing vinyl polymer, useful as a heat or light curing reactive prepolymer, containing at least a constituent unit expressed by the following formula (I):

Abstract: There is provided a knowledge analysis system configured to be connectable to plural client terminals via network, which supports analysis requested by each of client terminals to knowledge accumulated in knowledge database, comprising: access control means for conducting user authentication to the client terminal requesting for access for permitting knowledge analysis from the client terminal; and knowledge analysis means for clustering knowledge accumulated in the knowledge database to create cluster database in which each of the knowledge is classified into clusters defined based on category; wherein the knowledge analysis means has means for setting important words having priority in clustering at creation of the cluster database, and carries out clustering to create an axis of cluster on the basis of the important words.

Abstract: There is provided a knowledge analysis system configured to be connectable to plural client terminals via network, which supports analysis requested by each of client terminals to knowledge accumulated in knowledge database, comprising: access control means for conducting user authentication to the client terminal requesting for access for permitting knowledge analysis from the client terminal; and knowledge analysis means for clustering knowledge accumulated in the knowledge database to create cluster database in which each of the knowledge is classified into clusters defined based on category; wherein the knowledge analysis means has means for setting important words having priority in clustering at creation of the cluster database, and carries out clustering to create an axis of cluster on the basis of the important words.

Abstract: Disclosed is a medical valve apparatus having a valve assembly which comprises a valve seat and a movable valve, and which is arranged in a duct of a medical appliance, wherein a plurality of through holes for the passage of a fluid are formed through the valve seat, the movable valve is composed of a flexible membrane, and the movable membrane is fixed on the valve seat substantially at the central point thereof. The flexible membrane has a corolla-like shape at the time of a forward flow to allow a free flow of the fluid passing in the through holes, and at the time of a back flow, the flexible membrane is wide-spread to adhere to the valve seat and close the through holes whereby the passage of the regurgitation is prevented. Preferably, the peripheral edge of the valve seat is integrated with the inner wall of the duct of the medical appliance without a seam therebetween.