General Electric

About: General Electric is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Turbine & Rotor (electric). The organization has 76365 authors who have published 110557 publications receiving 1885108 citations. The organization is also known as: General Electric Company & GE.

Accelerating peer-to-peer content distribution

Abstract: The acceleration of peer-to-peer downloads of content files wherein a tracker performs a condition based peer selection that is dynamically adjustable. A further feature relates to the use of enhanced message scheme for communications. One embodiment is a system in a swarm having at least one origin seed capable of at least initially storing the content files with at least one tracker maintaining a list of peers wherein the tracker uses at least one dynamically adjusting peer selection algorithm to generate a condition based peer-list and provides the condition based peer-list to a requesting peer.

Fatigue of 60/40 Solder

Abstract: Plastic strain versus fatigue life data are presented for tests run at -- 50, 35, 125, and 150°C. It was found that these data could be correlated by the Coffin-Manson fatigue law, with an exponent of approximately 0.5 for the tests run at -35°C to 125°C. At 150°C the exponent was reduced to 0.37. These results were obtained for plastic strain limited tests. Different results are obtained when total strain limits are employed. This difference is discussed. The influence of cycling frequency and temperature changes are also discussed. A model is presented which describes the influence of plastic strain and cycling frequency. Corrections to the model predicted fatigue life, which account for temperature changes, cycling waveshape, and joint geometries, are also discussed.

Sintering of Covalent Solids

Abstract: The sintering behavior of primarily covalently bonded β-SiC, Si, and Si3N4 was studied using surface area and densification measurements as well as observations of microstructures developed during firing. The existence of highly dense, microscopic regions and large (≥100°) dihedral angles in fired compacts of β-SiC and Si which experience little macroscopic densification suggests that macroscopic densification is not intrinsically limited by the effects of surface energy. The mechanism proposed to explain the microstructure that develops in unsinterable covalent solids which do not undergo a phase change is based on the existence of a high ratio of surface and/or vapor-phase matter transport-to-volume and/or grain-boundary transport. The addition of boron to both β-SiC- and Si-containing carbon retards surface and/or vapor-phase transport and grain growth at lower temperatures, which results in enhanced densification at high temperatures. Macroscopic densification of β-SiC and α-Si3N4 can also be retarded by the formation of a continuous network of high-aspect-ratio grains of the polymorphic form that rigidities the sintering body. Finally, the sintering of pure Si depends sensitively on particle size in the submicron range. Nearly theoretical density is achieved in Si powder of ∼0.06-μm size. This result suggests that other pure covalently bonded solids can also be sintered to high density without applied pressure.