Motorola

About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.

Mass Transport of Aluminum by Momentum Exchange with Conducting Electrons

Abstract: A failure mode commonly found in high power devices and integrated circuits appears when aluminum conductors carry current densities in excess of 105 amperes per square centimeter at temperatures above 100°C The mode of failure is an open circuit which often is observed as a "crack" in the aluminum and is commonly referred to as "cracked stripe" or "disappearing aluminum" This paper presents a study of this failure mode which has been identified with the mass transport of aluminum by momentum exchange between activated aluminum ions and conducting electrons The activation energy for the reaction has been obtained and equations relating temperature, current density and film structure to conductor life are presented The activation energy appears to be identical to that for the lattice self-diffusion of aluminum modified by factors involving both surface diffusion and grain-boundary diffusion These latter two factors are important in films formed by the condensation of aluminum vapor

Apparel having multiple alternative sensors and corresponding method

Abstract: One or more items of apparel have a plurality of sensors (10, 11, and 12) disposed therein (either permanently or temporarily). These sensors sense physical states of the individual wearing the items of apparel and/or of the local environment. In one embodiment, multiple sensors sense, in alternative ways, a parameter that corresponds to a physical state of interest. Information from these alternative sensing approaches is co-processed to yield a resultant parameter value that can be used in various ways. In one embodiment, the parameter value is locally or remotely displayed. In one embodiment, the parameter value is used in comparison against risk thresholds to ascertain a degree of risk to the individual.

Uniform emission backlight

Abstract: A backlight having lamps inserted into ends of a transparent member is disclosed. A top surface of the member is polished and contains an opaque section opposing the lamps. A bottom surface of the member is uniformly frosted so that variations in the average depth of surface irregularities are minimized.

Supporting concurrent applications in wireless sensor networks

Abstract: It is vital to support concurrent applications sharing a wireless sensor network in order to reduce the deployment and administrative costs, thus increasing the usability and efficiency of the network. We describe Melete 1 , a system that supports concurrent applications with efficiency, reliability, flexibility, programmability, and scalability. Our work is based on the Mate virtual machine [1] with significant modifications and enhancements. Melete enables reliable storage and execution of concurrent applications on a single sensor node. Dynamic grouping is used for flexible, on-the-fly deployment of applications based on contemporary status of the sensor nodes. The grouping procedure itself is programmed with the TinyScript language. A group-keyed code dissemination mechanism is also developed for reliable and efficient code distribution among sensor nodes. Both analytical and simulation results are presented to study the impact of several key parameters and optimization techniques on the code dissemination mechanism. Simulation results indicate satisfactory scalability of our techniques to both application code size and node density. The usefulness and effectiveness of Melete is also validated by empirical study.

Portable electronic device having directional proximity sensors based on device orientation

Abstract: A portable electronic device having one or more proximity sensors. The portable electronic device comprises a housing, one or more signal emitters to direct source signal(s) based on the orientation of the housing, and one or more signal receivers to receive return signals corresponding to the source signal(s). For one embodiment, the device may include multiple signal emitters and a sensor to identify an orientation of the housing. The appropriate signal emitter may be selected based on the orientation of the housing as identified by the sensor. For another embodiment, the device may include a mechanism to redirect a source signal from a signal emitter in an appropriate direction based on the orientation of the housing.