摘要:
A ball grid array (BGA) includes straight pins at the corners and if desired along the edges of the array that are engaged with a PCB to reduce stress on the solder balls. The pins can be on the chip substrate of the BGA or on a separate frame that is glued to the chip substrate.
摘要:
A printed circuit board (PCB) for supporting a ball grid array (BGA) includes stress relief features to reduce stress on the solder balls. The stress relief features can be plural lines formed into the PCB along the edges of the BGA, and/or holes formed through the PCB near the corners of the BGA.
摘要:
Mechanical stress on solder joints that hold BGA modules to computer motherboards is reduced by adding to the motherboard a topmost layer, and forming V-shaped channels into the layer next to the BGA module so that stress is shielded from the BGA module and its solder joints.
摘要:
An apparatus, system, and method are disclosed for protecting a motion-sensitive device. The apparatus includes an identification module, a determination module, and a scheduler. The identification module identifies a use-intensive task involving the motion-sensitive device. The determination module determines a motion forecast that predicts a substantially motionless time interval. The scheduler schedules the use-intensive task such that the use-intensive task executes within the substantially motionless time interval. In this manner, a historical movement pattern is used to schedule future tasks such that the coincidence of task use of the motion-sensitive device and movement of the motion-sensitive device is minimized.
摘要:
An apparatus, system, and method are disclosed for balancing the read and write requirements of applications running in a computerized system against the requirements to protect a motion sensitive device in the system and requirements to protect data. The apparatus includes an application interface, a motion policy module, and a control module. The application interface delivers configuration parameters and system information to the motion policy module which establishes a policy for controlling the motion sensitive devices. The control module is configured to selectively communicate with one or more applications running in the computerized system and motion sensitive devices on the system. The control module executes actions to protect motion sensitive devices and system data and to maintain data read and write rates on the system in accordance with the configured protection policies and inputs from motion sensor devices.
摘要:
A wireless network access point is described which provides the resources of a backbone network to wireless clients. The access point is able to detect a degraded condition on the backbone network. Upon detecting the degraded condition, the access point selectively dissociates clients on the wireless network. In order to select which clients are dissociated first, a predetermined client dissociation policy is established. The policy can include account priority, bandwidth utilization, elapsed time since last transfer, and, amongst other criteria, whether the client is currently transferring in peer-to-peer mode on the wireless network. Upon detecting the degraded condition, either immediately or after a predetermined delay to ensure that the degraded condition is not temporary, clients on the wireless network are dissociated according to the preestablished policy.
摘要:
A method and corresponding network interface device for communicating between devices connected to a LAN includes attempting to communicate between the network devices over an initial subset of the network media wires. If the communication fails, a subsequent subset of media wires is selected. The wires of this subsequent subset differ from the wires of the initial subset. If the attempted communication succeeds, the current subset of network media wires is used as the media over which subsequent network data is transmitted. Attempting to communicate over the media may include sending an initialization sequence such as an Ethernet Auto-negotiate sequence. In one embodiment, the network media is implemented as 8 wires of CAT 5 cabling suitable for use with a Gigabit Ethernet. In this embodiment, any subsequent subsets of the network media wires may consist of 4 of the 8 wires over which 100 Mbps Ethernet operation may occur.
摘要:
A wireless network access point is described which provides the resources of a backbone network to wireless clients. The access point is able to detect a degraded condition on the backbone network. Upon detecting the degraded condition, the access point transmits or broadcasts a reassociation request to one or more clients associated with the access point. In addition, the rate at which new associations are made is halted or reduced during the degraded backbone condition. In one embodiment, the association rate is reduced by increasing the interval between beacons transmitted by the access point which identify the access to the backbone network.
摘要:
When an authenticated wireless computer loses connectivity to a wireless access point of a network and roams to another access point, the wireless computer (e.g., a hypervisor in the computer) determines whether the new access point is authorized for secure communication and if so, releases access to secure data on the network through the new access point.
摘要:
A system, method, and program product is provided that initializes a counter maintained in a nonvolatile memory of a security module to an initialization value. The security module receives requests for a secret from requesters. The security module releases the secret to the requesters and the released secrets are stored in memory areas allocated to the requesters. A counter is incremented when the secret is released. Requestors send notifications to the security module indicating that the requestor has removed the secret from the requestor's memory area. The security module decrements the counter each time a notification is received. When the computer system is rebooted, if the counter is not at the initialization value, the system memory is scrubbed erasing any secrets that remain in memory.