Abstract: An HEMT device includes a semiconductor epitaxial layer, a source electrode, a drain electrode, a gate electrode, a field plate structure, a first passivation layer, and a second passivation layer. The gate electrode includes a gate foot and a gate cap. The field plate structure includes a first portion, a second portion, a third portion, an extension portion. The second passivation layer has a first groove. The first groove has a first sidewall and a second sidewall. The first sidewall forms a first inclining angle with an imaginary line parallel to a gate length direction. The second sidewall and the imaginary line form a second inclining angle. Both of the first inclining angle and the second inclining angle are formed outside the first groove, and the first inclining angle is greater than the second inclining angle. A method for manufacturing the HEMT device is also provided.

Abstract: The invention provides aqueous formulations containing a compound that stimulates cardiac P2X receptor activity, and methods for their use in stimulating cardiac P2X receptor activity and treating medical disorders, such as heart failure.

Abstract: A fan impeller system has a rotor element (10), a multiplicity of fan impeller blades (30) and a multiplicity of adapter elements (20). The rotor element (10) has a multiplicity of receptacles (11) that are evenly distributed in a circumferential direction (U) with an adapter element (20). The adapter element (20) is arranged between the respective fan impeller blade (30) and the respective receptacle (11). The adapter elements (20) may differ at least in their shape and/or dimensions. The fan impeller blades (30) may differ at least in their shape and/or dimensions.

Abstract: A fan impeller system has a rotor element (10), a multiplicity of fan impeller blades (30) and a multiplicity of adapter elements (20). The rotor element (10) has a multiplicity of receptacles (11) that are evenly distributed in a circumferential direction (U) with an adapter element (20). The adapter element (20) is arranged between the respective fan impeller blade (30) and the respective receptacle (11). The adapter elements (20) may differ at least in their shape and/or dimensions. The fan impeller blades (30) may differ at least in their shape and/or dimensions.