摘要:
A modulatable laser diode for high frequencies, such as a tuneable turn guide distributed feedback laser diode, that has a central layer provided for a separate current supply located between a tuning layer and an active layer. The tuning layer has a quantum well structure. A ridge waveguide is provided for the laser diode and the layer sequence is limited to a strip-shaped mesa on the substrate in order to reduce the parasitic capacitances.
摘要:
The invention discloses a method for encrypting and/authenticating, comprising the following steps: Sending a request for a first bit combination or character combination as a first sub key (102); storing said first bit combination or character combination in the memory (104); generating a second bit combination or character combination as a second sub key (106), wherein the second bit combination or character combination is a random or pseudo random pattern; and combining said first sub key and second sub key to a key (108); further comprising at least one of the following steps: encrypting the data with the key (110); using the key as an authentication password (112); and a method of decrypting and/or authenticating, comprising the following steps: sending a request for a first bit combination or character combination as a first sub key (202); storing said first bit combination or character combination in the memory (204); repeating the following steps until a key has been verified as valid: generating one by one a second bit combination or character combination as a second sub key (206), wherein the second bit combination or character combination is one by one taken from the set of all possible second sub keys (208); combining said first sub key and second sub key to a key (210); verifying, whether the key is valid (212); if said key has been verified as valid, decrypting the data with the key (214) and/or using the key an authentication password (216).
摘要:
A rolling-element bearing assembly includes an inner ring, an outer ring and a plurality of rolling elements disposed between the inner ring and the outer ring on a common pitch circle diameter. A retaining device is attached to one of the inner ring and the outer ring and holds the rolling-element bearing assembly together without falling apart. The rolling elements include balls and rollers disposed on the common pitch circle diameter in an alternating manner. Further, at least one of the inner ring and the outer ring includes a raceway groove that axially supports the roller bearing balls.
摘要:
A method and apparatus are disclosed for a multi-spool gas turbine engine with a variable area turbine nozzle and a motor/alternator device on the highest pressure turbo-compressor spool for starting the gas turbine and power extraction during engine operation. During power down of the engine, the variable area turbine nozzle may be used in conjunction with power extraction to maintain a near constant combustor outlet temperature while controlling turbine inlet temperatures on the turbines downstream of the highest pressure turbine and controlling spool speed on the highest pressure turbine.
摘要:
The invention relates to a process for production of fatty acids directly from soapstock generated in the alkali refining process including the steps of (a) adding a lipase directly to the alkaline soapstock to facilitate hydrolysis of glycerides without prior neutralization, (b) neutralizing and splitting the soaps with strong acids, and (c) separating the fatty acid phase from the aqueous phase by settling and/or centrifugation. A second embodiment is a process in which the soapstock is first neutralized and split with strong acids, followed by adding a lipase to facilitate glyceride hydrolysis, and separating the fatty acid phase. The fatty acids so obtained can be esterified with C1-C6 alcohols using a lipase that is selective for fatty acids and does not transesterify the sterolesters, and the fatty acid esters and sterolesters are separated by distillation.The sterolesters are useful as supplements for food, as pharmaceutical agents for lowering cholesterol and as biofuel and biodiesel.
摘要:
The air guiding device has one or more air guiding bodies. Each air guiding body has an elongate attachment that extends in the longitudinal direction of the vehicle that bulges in a convex manner, is composed of a flexible or soft-elastic material and is embodied in the form of a half shell having a lateral elongate opening and can be adjusted automatically in the driving condition from a rest position into an operative position, in which it can be lowered in the direction of the roadway. In the rest position, the air guiding body is arranged close to the undersurface and, in the operative position, the air guiding body is held in a lowered position relative to the undersurface.
摘要:
According to the invention, a process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive substances which require a high separation efficiency is proposed, in particular a process for the working-up of a VE- or VEA-containing product stream. The process is characterized in particular in that, in a first purification stage, low-boiling products and unspecified isomers of the useful product are separated from the product stream virtually without loss of useful product and that, in a second purification stage, the useful product is removed in a stream having a purity of >97% by weight and a further stream having a purity of >92% by weight. A preferred embodiment of the process serves for working up VEA, in which the loss of useful product in the first purification stage is less than 5%, based on that amount of VEA in the feed which is added to the purification stage per unit time. Furthermore, the first purification stage may comprise a rectification column (1), from the top (1a) of which the low-boiling products and the unspecified isomers of VEA are taken off, a stream containing the useful product in purified form being taken off at the side (15) and/or at the bottom (1b) of the column (1).
摘要:
A fork assembly has a handle. The handle includes a first and second handle member. Each of the first and second handle members has a grip. The first and second handle members are joined together at their rear portione by a resilient member. The resilient member biases the first and second handle member so that they remain spaced apart until squeezed together by a user. The fork further has an ejector coupled to the handle. The ejector compresses and secures the first and second handle members within the predetermined distance when the fork is in a resting state. An abutment on the inside of the handle prevents over squeezing of the fork assembly
摘要:
A cutting board assembly has a cutting board with at least one cutting surface. A cutting board receptacle is configured for mounting to a countertop having an upper surface. The receptacle defines a recess for closely receiving the cutting board to prevent substantial lateral movement therein and has a sufficient depth so that the at least one cutting surface of the cutting board is generally flush with the upper surface of the countertop when the cutting board is received within the recess. The receptacle removably receives the cutting board so that the cutting board may be selectively and readily removed and replaced within the recess of the receptacle.
摘要:
The bartender's tip jar is an extruded plastic bottle having an open necked portion and a cylindrical body portion having two separable sections for inherently separating paper currency from the coins. The uppermost separable necked section is adjacent a centered truncated cone with its apex pointed up and having its peripheral base attached to the wall of the middle bottle section. The conical portion has peripheral coin receiving apertures alternating with raised isosceles triangle shaped coin deflectors adjacent the bottle wall. The bottom bottle section, the middle section, and the neck portion are connected together by threading regions. The outside bottle surface of the necked portion has one curved rectangular promotional insert window guide for insertion of an advertisement sheet of a beer or liquor brand, bar name and the like from an open top, and having a centered oval thumb slide opening to facilitate the removal of the sheet. The opposite surface of the bottle can be used to attach a label (without a window) advertising a product logo branding and the like. A plurality of light emitting diodes can be positioned proximate the bottom of the bottle and energized by battery to attract attention to the bartender's tip jar.