摘要:
The invention provides oxygen- resistant iron-hydrogenases ([Fe]-hydrogenases) for use in the production of H2. Methods used in the design and engineering of the oxygen-resistant [Fe]-hydrogenases are disclosed, as are the methods of transforming and culturing appropriate host cells with the oxygen-resistant [Fe]-hydrogenases. Finally, the invention provides methods for utilizing the transformed, oxygen insensitive, host cells in the bulk production of H2 in a light catalyzed reaction having water as the reactant.
摘要:
A lantern includes a housing, a fuel inlet, and a flame guard surrounding the region in which the fuel is burned. A shield is hingedly connected to the housing to allow movement between a closed position in which the shield protects the flame guard and blocks access to the fuel inlet, and an open position. The shield may be made of two parts, and a crenulated bail may be used to hang the lantern.
摘要:
The invention provides oxygen-resistant iron-hydrogenases ([Fe]-hydrogenases) for use in the production of H2. Methods used in the design and engineering of the oxygen-resistant [Fe]-hydrogenases are disclosed, as are the methods of transforming and culturing appropriate host cells with the oxygen-resistant [Fe]-hydrogenases. Finally, the invention provides methods for utilizing the transformed, oxygen insensitive, host cells in the bulk production of H2 in a light catalyzed reaction having water as the reactant.
摘要:
An interactive toy doll is provided having a torso defining a front portion and a back portion. The doll may additionally include legs extending from a lower portion of the torso, an image sensor located on the front portion of the torso, and an image display located on the back portion of the torso. The doll may further include a processor operatively connected to the image sensor and the image display. Additionally, the doll may include legs that may be grasped by a user while leaving the image sensor and the image display exposed so that a user may view an image on the image display while grasping the legs.
摘要:
A digitally-controlled, DC/DC converter includes a switched-mode power stage for the purpose of converting an input voltage (Vin) into an output voltage (Vout); the power stage including a controllable switching device, which is turned ON and OFF by a control device with temporal resolution Δt. The converter further includes a duty cycle control mechanism for controlling the duty cycle of the controllable switching device; the duty cycle control mechanism including a mechanism for estimating the output voltage error, and a selector mechanism for determining the turn OFF and turn ON times of the controllable switching device by choosing, cycle by cycle, an ON time/OFF time pair from a working set of two quantized ON time/OFF time pairs, choosing in such a manner that the amplitude of the output voltage error is continually minimized. At each switching cycle, the current output voltage error estimate is generated, and an ON time/OFF time pair is chosen. Where the output voltage error estimate is small, the choice is determined via a Bresenham sequence generator.
摘要:
A digitally-controlled, DC/DC converter includes at least one switched-mode power stage for the purpose of converting an input voltage (Vin) into an output voltage (Vout); the power stage including at least one controllable switching device, which is turned ON and OFF by a control device with temporal resolution Δt. The converter further includes a duty cycle control mechanism for controlling the duty cycle of the controllable switching device, the duty cycle control mechanism including a mechanism for estimating the output voltage error; a mechanism for estimating the target duty cycle; a duty cycle quantization mechanism for determining, for a target duty cycle estimate, a first set of quantized ON time/OFF time pairs suitable for controlling the switching device; and a selector mechanism for determining the turn ON and turn OFF times of said controllable switching device by choosing, cycle by cycle, an ON time/OFF time pair from a second set of quantized ON time/OFF time pairs, derived from said first set, choosing in such a manner that the amplitude of the output voltage error is continually minimized. At each switching cycle, the current output voltage error estimate is generated, and the ON time/OFF time pair from the second set of quantized ON time/OFF time pairs is chosen, after the switching cycle has begun, but before the turn OFF time implicit in the chosen pair
摘要:
A digitally-controlled, DC/DC converter includes at least one switched-mode power stage for the purpose of converting an input voltage (Vin) into an output voltage (Vout); the power stage including at least one controllable switching device, which is turned ON and OFF by a control device with temporal resolution Δt. The converter further includes a duty cycle control mechanism for controlling the duty cycle of the controllable switching device, the duty cycle control mechanism including a mechanism for estimating the target duty cycle, a duty cycle quantization mechanism for determining, for a target duty cycle estimate, a set of quantized ON time/OFF time pairs suitable for controlling the switching device, and a sequencing mechanism for determining the turn ON and turn OFF times of said controllable switching device by choosing, cycle by cycle, an ON time/OFF time pair from the set of quantized ON time/OFF time pairs, choosing in such a manner that the time-averaged value of the resultant duty cycle is equivalent to the estimated target duty cycle.
摘要:
A handle assembly includes a mounting bracket and a handle. The mounting bracket supports the handle which can pivot relative to the mounting bracket. The mounting bracket includes first and second mounting elements which prevent the handle from rotating more than approximately ninety degrees relative to the mounting bracket.
摘要:
Systems and methods for the allocation of computing resources in a fantasy sports contest. In one embodiment, software is disclosed that enables and operator to implement a fantasy sports league having a plurality of fantasy owners. Individual ones of the fantasy owners are enabled with the ability to activate one or more fantasy players from their team for a subset of a given contest. Accordingly, fantasy points are accrued that add and display each fantasy owner's points that have been accrued in a scoring period to track competitive rankings within the given fantasy league. The overall system may allocate computing resources using a content management system in order to optimize the operation of the fantasy league and provide for improved user experience.