Abstract: A light and relatively simple structure for preventing rain leakage in a tree house. A tree house using a trunk of a tree as a pillar inevitably has a gap between the trunk and a roof. Thus, a plurality of two-layer waterproof sheets are placed on top of the roof, so that each sheet can absorb rain water that would run down the trunk of the tree and enter the gap, and can drain the rain water onto the roof. This makes it possible to prevent rain leakage in the tree house through the gap between the trunk of the tree and the roof.

Abstract: A light and relatively simple structure for preventing rain leakage in a tree house. A tree house using a trunk of a tree as a pillar inevitably has a gap between the trunk and a roof. Thus, a plurality of two-layer waterproof sheets are placed on top of the roof, so that each sheet can absorb rain water that would run down the trunk of the tree and enter the gap, and can drain the rain water onto the roof. This makes it possible to prevent rain leakage in the tree house through the gap between the trunk of the tree and the roof.

Abstract: An outdoor unit includes an air heat exchanger; a compressor; a water heat exchanger; an expansion valve; a fan that moves air outside the outdoor unit into the air heat exchanger; a motor that rotates the fan; a power device used for driving the compressor; a heat sink located in a space that is an extension portion beyond the air heat exchanger, of a channel of air moved by rotation of the fan during heating of the water from outside the outdoor unit into the air heat exchanger, where the heat sink dissipates heat generated by the power device during driving of the compressor; and a control unit that provides control, upon completion of a water heating operation, to drive the compressor, to open the expansion valve, and to rotate the fan in the same direction as the rotation direction of the fan during heating of the water.

Abstract: A semiconductor device includes: a wiring board including an insulating board and a wiring layer, the insulating board having an element mounting surface, which is a first main surface, and a back surface, which is a second main surface on the opposite side of the element mounting surface, the wiring layer being formed on the back surface and including a wiring portion and a heat dissipation portion; a power element that is a semiconductor element, is mounted on the element mounting surface of the wiring board, and is connected to the wiring portion; a spacer that is interposed between the power element and the element mounting surface of the wiring board and is connected to the back-surface-side heat dissipation portion; and a heatsink that sandwiches, together with the spacer, the power element and is secured to the spacer.

Abstract: A semiconductor device includes: a wiring board including an insulating board and a wiring layer, the insulating board having an element mounting surface, which is a first main surface, and a back surface, which is a second main surface on the opposite side of the element mounting surface, the wiring layer being formed on the back surface and including a wiring portion and a heat dissipation portion; a power element that is a semiconductor element, is mounted on the element mounting surface of the wiring board, and is connected to the wiring portion; a spacer that is interposed between the power element and the element mounting surface of the wiring board and is connected to the back-surface-side heat dissipation portion; and a heatsink that sandwiches, together with the spacer, the power element and is secured to the spacer.

Abstract: Disclosed is an electronic bulletin board system, which communicates with a user computer via a network, and mediates information exchange therebetween by an electronic bulletin board function. The electronic bulletin board is accompanied with a database of a notable words collection storing a plurality of words that are appropriately selected, each word in which is linked with a corresponding URL. A message text from a user computer is checked by using the notable words collection. When the message text does not include a notable word in the notable words collection, the message is posted on the bulletin board. When a notable word is found in the text, the notable word in the message text is converted into a hypertext format having the URL to which the word is linked as a link destination, and the message is posted on the bulletin board.

Abstract: Disclosed is an electronic bulletin board system, which communicates with a user computer via a network, and mediates information exchange therebetween by an electronic bulletin board function. The electronic bulletin board is accompanied with a database of a notable words collection storing a plurality of words that are appropriately selected, each word in which is linked with a corresponding URL. A message text from a user computer is checked by using the notable words collection. When the message text does not include a notable word in the notable words collection, the message is posted on the bulletin board. When a notable word is found in the text, the notable word in the message text is converted into a hypertext format having the URL to which the word is linked as a link destination, and the message is posted on the bulletin board.

Abstract: A message desired to be posted on an electronic bulletin board sent from a user's computer is checked with a posting-prohibited word list and a heed-required word list. In the posting-prohibited word list, words previously selected as those inadequate to be posted are registered. In the heed-required list, words previously selected as those to be heeded about the social reaction even though the message is allowed to be posted are registered. When the message desired to be posted includes no posting-prohibited word, the message is posted on an electronic bulletin board. When the message includes any heed-required word, the posting of the message is reported to an operation manager computer. When the message includes any posting-prohibited word, a letter screen indicating that the message cannot be posted is sent to the user s computer which has sent the message, and the operation manager computer is informed of the rejection of the posting.

Abstract: Disclosed is an electronic bulletin board system, which communicates with a user computer via a network, and mediates information exchange therebetween by an electronic bulletin board function. The electronic bulletin board is accompanied with a database of a notable words collection storing a plurality of words that are appropriately selected, each word in which is linked with a corresponding URL. A message text from a user computer is checked by using the notable words collection. When the message text does not include a notable word in the notable words collection, the message is posted on the bulletin board. When a notable word is found in the text, the notable word in the message text is converted into a hypertext format having the URL to which the word is linked as a link destination, and the message is posted on the bulletin board.