Abstract:
A device and method for drawing off and recirculating cooling streams, specifically for drawing off and recirculating a cooling stream of fuel for cooling at least one aircraft engine accessory, is disclosed. The device having a tubular jacket part defining a flow cross-section through which a primary stream, specifically a fuel stream, flows by way of an extraction pipe which is positioned approximately in the center of the flow cross-section, or jacket part, in order to draw off a cooling stream from the primary stream, by way of a hollow strut extending in the radial direction to divert this cooling stream from the device with the aid of the extraction pipe and to supply it to at least one accessory to be cooled, and by way of a return opening to recirculate the cooling stream directed through the accessory for cooling purposes to the primary stream.
Abstract:
A device and method for drawing off and recirculating cooling streams, specifically for drawing off and recirculating a cooling stream of fuel for cooling at least one aircraft engine accessory, is disclosed. The device having a tubular jacket part defining a flow cross-section through which a primary stream, specifically a fuel stream, flows by way of an extraction pipe which is positioned approximately in the center of the flow cross-section, or jacket part, in order to draw off a cooling stream from the primary stream, by way of a hollow strut extending in the radial direction to divert this cooling stream from the device with the aid of the extraction pipe and to supply it to at least one accessory to be cooled, and by way of a return opening to recirculate the cooling stream directed through the accessory for cooling purposes to the primary stream.
Abstract:
A device for automatically controlling the edges of a web of sheeting has a first deflecting roller and a second deflecting roller, which are arranged parallel to each other, and also a drive for shifting the deflecting rollers in opposite axial directions. A sensor detects the position of the sheeting. The drive shifts the deflecting rollers in opposite axial directions and the ratio between the friction of the sheeting on the first deflecting roller and the friction of the sheeting on the second deflecting roller is changed on the basis of the position of the sheeting detected by the sensor.
Abstract:
A semiconductor structure includes a light emitting region, a p-type region disposed on a first side of the light emitting region, and an n-type region disposed on a second side of the light emitting region. At least 10% of a thickness of the semiconductor structure on the first side of the light emitting region comprises indium. Some examples of such a semiconductor light emitting device may be formed by growing an n-type region, growing a p-type region, and growing a light emitting layer disposed between the n-type region and the p-type region. The difference in temperature between the growth temperature of a part of the n-type region and the growth temperature of a part of the p-type region is at least 140° C.
Abstract:
In a method according to embodiments of the invention, a III-nitride layer is grown on a growth substrate. The III-nitride layer is connected to a host substrate. The growth substrate is removed. The growth substrate is a non-III-nitride material. The growth substrate has an in-plane lattice constant a substrate. The III-nitride layer has a bulk lattice constant a layer. In some embodiments, [(|a substrate−a layer|)/asubstrate]*100% is no more than 1%.
Abstract:
In a method according to embodiments of the invention, a III-nitride layer is grown on a growth substrate. The III-nitride layer is connected to a host substrate. The growth substrate is removed. The growth substrate is a non-III-nitride material. The growth substrate has an in-plane lattice constant a substrate. The III-nitride layer has a bulk lattice constant a layer. In some embodiments, [(|a substrate−a layer|)/asubstrate]*100% is no more than 1%.
Abstract:
In a III-nitride light emitting device, a ternary or quaternary light emitting layer is configured to control the degree of phase separation. In some embodiments, the difference between the InN composition at any point in the light emitting layer and the average InN composition in the light emitting layer is less than 20%. In some embodiments, control of phase separation is accomplished by controlling the ratio of the lattice constant in a relaxed, free standing layer having the same composition as the light emitting layer to the lattice constant in a base region. For example, the ratio may be between about 1 and about 1.01.
Abstract:
In a III-nitride light emitting device, a ternary or quaternary light emitting layer is configured to control the degree of phase separation. In some embodiments, the difference between the InN composition at any point in the light emitting layer and the average InN composition in the light emitting layer is less than 20%. In some embodiments, control of phase separation is accomplished by controlling the ratio of the lattice constant in a relaxed, free standing layer having the same composition as the light emitting layer to the lattice constant in a base region. For example, the ratio may be between about 1 and about 1.01.
Abstract:
A light emitting device in accordance with an embodiment of the present invention includes a first semiconductor layer of a first conductivity type having a first surface, and an active region formed overlying the first semiconductor layer. The active region includes a second semiconductor layer which is either a quantum well layer or a barrier layer. The second semiconductor layer is formed from a semiconductor alloy having a composition graded in a direction substantially perpendicular to the first surface of the first semiconductor layer. The light emitting device also includes a third semiconductor layer of a second conductivity type formed overlying the active region.
Abstract:
The present prefabricated structural element is especially adapted for the formation of balconies or other cantilevered structures. To this end a floor slab section or main section is joined to a balcony or cantilevered section by reinforcing steel elements which are connected to or in both sections and which bridge a gap between the sections. The gap width between the sections is preferably narrower than the top width of a supporting member, such as a wall or header, so that the gap may be filled with poured-in-place concrete once the element is properly placed in the desired position on top of the header or other supporting structure.