Abstract: A heat exchanger has multiple laminated fins 30. Each fin 30 has multiple tops 34 and multiple bottoms 36 arranged to have a preset acute angle ? (for example, 30 degrees) to an air flow line at an air inlet and to make an air flow in a cavity region behind each of multiple heat transfer tubes 22a to 22c in an air flow direction at an air outlet. This design of the fins 30 produces effective secondary flows of the air to improve the heat transfer efficiency and makes an additional contribution to heat exchange, due to the air flow in the cavity region behind each of the heat transfer tubes 22a to 22c in the air flow direction. This arrangement effectively prevents separation of the air flow and a local speed increase of the air flow, while improving the overall heat exchange efficiency by production of the effective secondary flows of the air.

Abstract: There is provided an electrostatic induction conversion device which is small, has high conversion efficiency between electric energy and kinetic energy, and can prevent degradation of an electret. The electret is formed by injecting an electric charge into the vicinity of the surface of an insulating material, is disposed between two conductors, and is constructed so that it moves relatively to at least one of the conductors opposite to the electret and converts between electric energy and kinetic energy. As the insulating material forming the electret, it is preferable to use a polymer having a fluorine-containing aliphatic cyclic structure.

Abstract: A cell separation device which can perform a continuous processing without bonding fluorescent molecules or magnetic particles to the surface of the cell membrane, a cell separation system, and a cell separation method, wherein when a sample cell suspension containing the desired target cells is supplied continuously from a sample inlet and physiological saline is supplied continuously from a physiological saline inlet, the sample cell suspension flows together with the physiological saline in a liquid flow path and an adsorption force acts on the target cells due to affinity bonding from the adsorbing portions of adsorbing regions in the form of strips formed in a planar wall portion. Since the adsorbing regions in the form of strips are disposed in an asymmetric fashion to the flow path direction of the liquid flow path, the adsorption force acting on the target cells has a constituent perpendicular to the flow path direction. As a result, the target cells shown in FIG.

Abstract: There is provided an electrostatic induction conversion device which is small, has high conversion efficiency between electric energy and kinetic energy, and can prevent degradation of an electret. The electret is formed by injecting an electric charge into the vicinity of the surface of an insulating material, is disposed between two conductors, and is constructed so that it moves relatively to at least one of the conductors opposite to the electret and converts between electric energy and kinetic energy. As the insulating material forming the electret, it is preferable to use a polymer having a fluorine-containing aliphatic cyclic structure.

Abstract: There is provided an electrostatic induction conversion device which is small, has high conversion efficiency between electric energy and kinetic energy, and can prevent degradation of an electret. The electret is formed by injecting an electric charge into the vicinity of the surface of an insulating material, is disposed between two conductors, and is constructed so that it moves relatively to at least one of the conductors opposite to the electret and converts between electric energy and kinetic energy. As the insulating material forming the electret, it is preferable to use a polymer having a fluorine-containing aliphatic cyclic structure.

Abstract: A heat exchanger has multiple laminated fins 30. Each fin 30 has multiple tops 34 and multiple bottoms 36 arranged to have a preset acute angle ? (for example, 30 degrees) to an air flow line at an air inlet and to make an air flow in a cavity region behind each of multiple heat transfer tubes 22a to 22c in an air flow direction at an air outlet. This design of the fins 30 produces effective secondary flows of the air to improve the heat transfer efficiency and makes an additional contribution to heat exchange, due to the air flow in the cavity region behind each of the heat transfer tubes 22a to 22c in the air flow direction. This arrangement effectively prevents separation of the air flow and a local speed increase of the air flow, while improving the overall heat exchange efficiency by production of the effective secondary flows of the air.

Abstract: There is provided an electrostatic induction conversion device which is small, has high conversion efficiency between electric energy and kinetic energy, and can prevent degradation of an electret. The electret is formed by injecting an electric charge into the vicinity of the surface of an insulating material, is disposed between two conductors, and is constructed so that it moves relatively to at least one of the conductors opposite to the electret and converts between electric energy and kinetic energy. As the insulating material forming the electret, it is preferable to use a polymer having a fluorine-containing aliphatic cyclic structure.