Abstract: A method of operating a switching power converter having at least one power switch controlled by a drive signal having a switching frequency is disclosed. The method includes monitoring an output power of the switching power converter, determining whether the output power has decreased below a threshold level and, in response to the output power decreasing below the threshold level, changing the switching frequency of the drive signal from a first switching frequency to a second switching frequency when an operating condition of the switching power converter is satisfied. Also disclosed are controllers and switching power converters (including PFC converters).

Abstract: A cost effective solution for construction of high frequency, double ended, isolated, push pull, center tapped power transformers operating in continuous/discontinuous mode with minimized winding proximity losses comprises at least two identical sets of windings with identical coupling coefficients. Each set of windings consists of at least one primary winding and at least one secondary winding tightly coupled to each other. Both the sets of windings are loosely coupled to each other with a magnetic field isolating separator.

Abstract: A cost effective solution for power factor correction in power devices operating at two widely separated input voltages comprises two unequal power rails. One power rail is optimized for operation at high line voltage only, while the other power rail is designed only for low line voltage. When operating at high line voltage, the second rail is disabled. At low line, both power rails are enabled but by virtue of unequal boost inductors, the high line power rail handles only about 30% of the power while the low line power rail handles the remaining power. Hence, the efficiency at high line voltage is maximized. As the inductance used in the high line power rail is much higher in value, it stays in continuous conduction mode for all load conditions and hence the power factor is significantly improved.

Abstract: In accordance with one or more aspects, a key protector for a storage volume is created by generating an intermediate key and protecting, based at least in part on a public/private key pair, the intermediate key. A volume master key for encrypting and decrypting one or more volume encryption keys that are used to encrypt the storage volume can be encrypted in different manners, including being encrypted based at least in part on the intermediate key. A key protector for the storage volume is stored that includes both the encrypted volume master key and information indicating how to obtain the intermediate key. Subsequently, the key protector can be accessed and, based at least in part on a private key of the entity associated with the key protector, the intermediate key can be decrypted. The intermediate key can then be used to decrypt the volume master key.

Abstract: A portable secure data file includes an encrypted data portion and a metadata portion. When a request associated with a current user of a device to access a portable secure data file is received, one or more records in the metadata portion are accessed to determine whether the current user is permitted to access the file data in the encrypted data portion. If a record indicates the user is permitted to access the file data, a content encryption key in that record is used to decrypt the encrypted data portion.

Abstract: In a storage system, multiple information units are individually associated with an access control policy (ACP) of multiple ACPs. Each respective information unit corresponds to a respective information unit encryption key (IUEK). The multiple information units are grouped into encryption zones based on their associated ACPs. In a described implementation, each ACP is associated with a zone root key (ZRK). In another described implementation, each IUEK corresponding to a given information unit is encrypted by an IUEK corresponding to an information unit at a most-proximate linked node of the storage system.

Abstract: Methods of regulating an output voltage of a multi-output isolated power converter are disclosed. One method includes allowing the output voltage to vary unregulated when the output voltage is below a threshold value and preventing the output voltage from increasing when the output voltage reaches the threshold value. Additional methods and multi-output power supplies are also disclosed.

Abstract: A method for sealing joints formed by the intersection and/or overlap of roofing membranes is disclosed. The method comprises the steps of applying strips of double sided tape to roofing membranes so as to secure the membranes to one another and to fill voids created at the intersection of the membranes. Securing the membranes using double-sided tape creates a tight seal which prevents the seepage of water and debris into the joint. A roof joint patch kit is also disclosed which comprises a roll of roofing membrane and a plurality of double-sided tape strips.

Abstract: A method and system for allocating a plurality of subcarriers to a plurality of subscriber devices in a wireless network. A set of characteristics is identified (302) for a transmission on each of the plurality of subcarriers. A dynamic weight is assigned (304) to at least one subscriber device of the plurality of subscriber devices at each decision instance of the transmission corresponding to the at least subscriber device. The assignment of the dynamic weight is based on at least one of a throughput, delay, packet-loss and queue length requirement of one or more flows of the subscriber device. Further, a set of optimum values is determined (306) for the set of characteristics based on the dynamic weights and channel feedback. The plurality of subcarriers are allocated (308) to the at least one subscriber device based on at least one optimum value of the set of optimum values.

Abstract: A method and apparatus for resource allocation and scheduling within a wireless communication system is provided herein. During resource allocation, a maximum total system transmit power (P), a maximum number of codes available (N), a maximum number of codes for each user in the system (N=(N1, . . . , Nd)), a maximum SINR value (S=(S1, . . . , Sd)) for each user in the system, and a SINR per watt of transmit power for each user in the system (e=(e1, . . . , ed)) is received by a scheduler. Scheduler then outputs an optimal number of codes per user (n) and power levels per user to (p).

Abstract: One embodiment of the present invention provides a system that facilitates faster execution of code on a memory-constrained computing device that has fast on-chip RAM, wherein the fast on-chip RAM is located on a processor chip, but is not cache memory. The system operates by copying a compiled method from an object heap to the fast on-chip RAM on the memory-constrained computing device. Additionally, the system updates an execution pointer to point to the compiled method in the fast on-chip RAM, wherein the execution pointer can also point to a compiled method in the object heap or an interpreted method in the object heap.

Abstract: A mobile station (150) senses (300) at least one boundary of a wireless communication packet (200) which includes a plurality of frames. The mobile station (150) then determines (310) at least a first group (210) and a second group (230) of frames at least in part in relation to the sensed boundary. The first group (210) of frames is received (320) at a first target reliability, and the second group (230) of frames is received (330) at a second target reliability. Optionally, the frames are sent (400) or received at a variable reliability in relation to the frames' distances from one or more boundaries (240, 250) of the packet (200).

Abstract: A method of controlling a power converter having at least one switching device for supplying an output voltage and a load current to a load is disclosed. The method includes sensing the output voltage and sensing the load current. The method further includes controlling a duty cycle of the switching device according to the sensed output voltage and a voltage control loop when a rate of change of the load current does not exceed a threshold level. The method also includes adjusting the duty cycle of the switching device set by the voltage control loop when the rate of change of the load current exceeds the threshold level.

Abstract: Various embodiments are described to address the need for channel maintenance/channel quality signaling that can better utilize reverse link capacity and conserve battery life. Generally expressed, a remote unit (101) enters (403) a high-rate-channel-maintenance mode in which it transmits channel maintenance signaling. When a low-rate condition is met (405), the remote unit enters (407) a low-rate-channel-maintenance mode in which it transmits channel maintenance signaling at either a lower rate or a lower transmit power than when in the high-rate-channel-maintenance mode. Then when a high-rate condition is met (409), the remote unit reenters the high-rate-channel-maintenance mode.

Abstract: A method and information processing system for wirelessly transmitting at least one of a downlink channel descriptor and an uplink channel descriptor for reception by at least one wireless device (104). The method comprises selecting at least one transmission time for transmitting a pointer that indicates a transmission time for a DCD and/or a UCD. The pointer is transmitted at a time between a first transmission and a second transmission of the at least one of downlink channel descriptor and uplink channel descriptor. The transmission time is selected to reduce a time interval for the at least one wireless device (104) to search for the at least one of the DCD and UCD. Also, a message that includes DCD information and/or UCD information associated with at least one neighboring cell can also be chosen to transmit at specifically chosen times to the at least one wireless device (104).

Abstract: A process (10) to facilitate determination of a particular data rate to use when communicating data with respect to a mobile station comprises providing (11) historical information regarding past radio frequency channel conditions, data quantity information (12) as corresponds to a current data file to be transmitted, and assessing (13) historical data transmission as correspond to the mobile station. One then selects (14) a data rate as a function of such information. In a preferred embodiment, this comprises varying a time scaling factor as a function of relative data file size, which time scaling factor serves to influence the extent to which past history serves to otherwise influence the selection of a particular data rate.

Abstract: A method and system for executing and undoing distributed server change operations for a collection of server objects across multiple target servers in a transaction-safe manner is provided. In one embodiment, server change operations for a collection of server objects, such as files and configuration file entries, are specified in a transaction package. The target servers to which the specified change operation are directed are also identified in the transaction package. Parameter values for each of the identified target servers are specified through a parameter file in the transaction package. The transaction package is sent to the identified target servers, which execute the change operations on the target servers in a transaction-safe manner using these parameter values.

Abstract: A method for managing allocation of connection identifiers (CIDs) to a wireless device in a network is provided. The method comprises allocating a CID to at least first wireless device based on a predefined criteria. The CID is allocated for at least one service accessed by the wireless device. The CID includes predetermined bit locations. The predetermined bit locations includes first predetermined bit locations and second predetermined bit locations. Further, the method comprises instructing the at least first wireless device to be responsive to messages that contain predetermined bit locations from the CID.

Abstract: In a storage system, multiple information units are individually associated with an access control policy (ACP) of multiple ACPs. Each respective information unit corresponds to a respective information unit encryption key (IUEK). The multiple information units are grouped into encryption zones based on their associated ACPs. In a described implementation, each ACP is associated with a zone root key (ZRK). In another described implementation, each IUEK corresponding to a given information unit is encrypted by an IUEK corresponding to an information unit at a most-proximate linked node of the storage system.

Abstract: A method and information processing system for wirelessly transmitting at least one of a downlink channel descriptor and an uplink channel descriptor for reception by at least one wireless device (104). The method comprises selecting at least one transmission time for transmitting a pointer that indicates a transmission time for a DCD and/or a UCD. The pointer is transmitted at a time between a first transmission and a second transmission of the at least one of downlink channel descriptor and uplink channel descriptor. The transmission time is selected to reduce a time interval for the at least one wireless device (104) to search for the at least one of the DCD and UCD. Also, a message that includes DCD information and/or UCD information associated with at least one neighboring cell can also be chosen to transmit at specifically chosen times to the at least one wireless device (104).