Abstract: A low profile board-to-board connector assembly includes a receptacle and a detachable plug. The receptacle has a receptacle housing with a plurality of arrayed first contacts mounted therein. Each first contact has a base portion, a first solder tail portion extending outwardly from one end of the base portion for connection with a first PCB, a retention portion perpendicular to the base portion, and a free first spring contact portion bent from the other end of the base portion and extending parallel to the retention portion. The plug has a plug housing with a plurality of arrayed second contacts mounted therein. Each second contact has a U-shaped portion with a pair of legs one of which is a free second spring contact portion and the other of which is a locking portion, and a second solder tail potion bent from an end of the locking portion and extending outwardly for connection with a second PCB.

Abstract: A low profile board-to-board connector assembly includes a receptacle and a detachable plug. The receptacle has a receptacle housing with a plurality of arrayed first contacts mounted therein. Each first contact has a base portion, a first solder tail portion extending outwardly from one end of the base portion for connection with a first PCB, a retention portion perpendicular to the base portion, and a free first spring contact portion bent from the other end of the base portion and extending parallel to the retention portion. The plug has a plug housing with a plurality of arrayed second contacts mounted therein. Each second contact has a U-shaped portion with a pair of legs one of which is a free second spring contact portion and the other of which is a locking portion, and a second solder tail potion bent from an end of the locking portion and extending outwardly for connection with a second PCB.

Abstract: The present invention more efficiently retrieves and processes data stored on an optical disk in a DVD-ROM format. Generally, the retrieval and processing of data includes inner and outer code error correction for a Reed-Solomon product like code and an error detection process for evaluating an extent of errors in a sector of data. For this device, the sector of data is encoded within a plurality of inner codes and parts of plural sectors encoded within each outer code. The device calculates an initial and an intermediate error detection value for data within the sector. The target for the error detection value is non-zero because the data within the sector are scrambled. If there is a match between the initial or intermediate error detection value, the sector can be presumed to be free of errors.

Abstract: The present invention more efficiently retrieves and processes data stored on an optical disk in a DVD-ROM format. Generally, the retrieval and processing of data includes inner and outer code error correction for a Reed-Solomon product like code and an error detection process for evaluating an extent of errors in a sector of data. For this device, the sector of data is encoded within a plurality of inner codes and parts of plural sectors encoded within each outer code. The device calculates an initial and an intermediate error detection value for data within the sector. The target for the error detection value is non-zero because the data within the sector are scrambled. If there is a match between the initial or intermediate error detection value, the sector can be presumed to be free of errors.

Abstract: The present invention more efficiently retrieves and processes data stored on an optical disk in a DVD-ROM format. Generally, the retrieval and processing of data includes inner and outer code error correction for a Reed-Solomon product like code and an error detection process for evaluating an extent of errors in a sector of data. For this device, the sector of data is encoded within a plurality of inner codes and parts of plural sectors encoded within each outer code. The device calculates an initial and an intermediate error detection value for data within the sector. The target for the error detection value is non-zero because the data within the sector are scrambled. If there is a match between the initial or intermediate error detection value, the sector can be presumed to be free of errors.

Abstract: A method of analyzing a protein, namely determining the amino acid sequence of a protein is described. Trypsin is added to a protein to form a liquid phase mixture of trypsin and the protein. The disulfide linkages of the protein may be reduced and the resulting sulfhydryl groups alkylated either before or after the addition of trypsin. The trypsin is allowed to digest the protein long enough to cleave protein into tryptic fragments. A portion of the digested mixture is ionized by ion evaporation to produce gas phase ions of the tryptic fragments, the gas phase ions being predominantly doubly charged with one charge at each end of the doubly charged ions. The gas phase ions of the tryptic fragments are analyzed by sequentially selecting therefrom ions of a desired mass to charge ratio in a first mass analyzer. The selected ions are fragmented by collision in a second mass analyzer to produce daughter ions, and the daughter ions are then analyzed in a third mass analyzer.

Abstract: A method of analyzing a protein, namely determining the amino acid sequence of a protein is described. Trypsin is added to a protein to form a liquid phase mixture of trypsin and the protein. The disulfide linkages of the protein may be reduced and the resulting sulfhydryl groups alkylated either before or after the addition of trypsin. The trypsin is allowed to digest the protein long enough to cleave protein into tryptic fragments. A portion of the digested mixture is ionized by ion evaporation to produce gas phase ions of the tryptic fragments, the gas phase ions being predominantly doubly charged with one charge at each end of the doubly charged ions. The gas phase ions of the tryptic fragments are analyzed by sequentially selecting therefrom ions of a desired mass to charge ratio in a first mass analyzer. The selected ions are fragmented by collision in a second mass analyzer to produce daughter ions, and the daughter ions are then analyzed in a third mass analyzer.

Abstract: A method of analyzing a protein, namely determining the amino acid sequence of a protein is described. Trypsin is added to a protein to form a liquid phase mixture of trypsin and the protein. The disulfide linkages of the protein may be reduced and the resulting sulfhydryl groups alkylated either before or after the addition of trypsin. The trypsin is allowed to digest the protein long enough to cleave protein into tryptic fragments. A portion of the digested mixture is ionized by ion evaporation to produce gas phase ions of the tryptic fragments, the gas phase ions being predominantly doubly charged with one charge at each end of the doubly charged ions. The gas phase ions of the tryptic fragments are analyzed by sequentially selecting therefrom ions of a desired mass to charge ratio in a first mass analyzer. The selected ions are fragmented by collision in a second mass analyzer to produce daughter ions, and the daughter ions are then analyzed in a third mass analyzer.