Abstract: An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) apply at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the at least one control value (SW) in a first state is determined by the first regulator (n_RGL), and in a second state is determined by the second regulator (n_RGL).

Abstract: Advanced bipropellant fuels with fast ignition upon mixing with storable oxidizer (N2O4, nitric acid) have been synthesized and demonstrated. The bipropellant fuels are based upon salts containing dicyanamide or tricyanomethanide anions and employ at least two hydrazine functionalities in the cations.

Abstract: An aspect of the present invention determines interface differences between different versions of an operating system. In one embodiment, the corresponding images of a first (older) version and a second (newer) version is inspected to identify whether access mechanism of a publicly accessible resource associated with a first interface provided by the first version is changed in the second version. Example of change in access mechanism includes a difference in the signature of function type resources, non-existence or change in the name or location of a file type resource and change in the physical file pointed to by a symbolic link type resource in the second version (as compared to that in the first version). A list of publicly accessible resources that are identified as having changed in the second version is then formed.

Abstract: The present invention provides a hot-trap device (1) comprising an enclosure (2) with at least one inlet (3), at least one outlet (5) at least one heating means (7) and at least one collector means (10) for the conversion of reaction by-products into products, wherein the collector means is arranged within the enclosure between the inlet and the outlet has a diameter that substantially matches the diameter of the enclosure and has at least one opening (18).

Abstract: A piece of seating furniture, particularly a chair with a resilient frame which, from the side view, is substantially configured Z-shaped and which includes an upper part of the frame, two lower parts of the frame and two middle parts of the frame, each connecting the lower part of the frame with the upper part of the frame. The middle parts of the frame each reach from the respective lower part of the frame in the rear area of a seat surface upwards at an angle to the upper part of the frame in the front area of the seat surface. The distance of the middle parts of the frame to one another at the upper part of the frame is up to a maximum of half, preferably up to a maximum of one third of the width of the seat surface in the front area. Thus, the piece of seating furniture which is particularly easy to stack, enables a large legroom for a person sitting on the piece of seating furniture and wherein the seat surface can be rocked towards the left and the right.

Abstract: The invention relates to a fan-and-filter unit to be mounted in the wall off a switch cabinet or housing, comprising a fan unit inserted in a fan housing, a filter mat arrangement mounted upstream of the fan unit and a fan cover immobilizing the filter mat. An embodiment advantageous for operation of the fan-and-filter unit consists in that the fan-and-filter unit has a filter mat monitoring unit which is designed to detect the service life and/or a degree of soiling of the filter mat arrangement and which comprises an insert integrated into the fan housing or the fan cover and having an illuminated display visible from the exterior of the fan cover facing away from the fan unit and being designed to display at least exceeding of a predetermined or predeterminable service life and/or a predetermined or predeterminable degree of soiling.

Abstract: To allow such a filter unit to be maintenanced easily, it provided according to the invention that the air passage grating is hinged indirectly or directly to the filter housing and can be adjusted between a closed position and an opened maintenance position. The filter housing has a retainer which positively blocks a catch of the air passage grating in the maintenance position.

Abstract: The invention relates to a louvered grille for an air conduction housing, comprising a plurality of louvers which are spaced apart from one another to form air passage openings, wherein the louvers extend in the widthwise direction of the louvered grille and have an upper louver face that is directed to the exterior and inclined transversely with respect to the vertical direction of the louvered grille. For better IP protection of such a louvered grille, according to the invention the upper louver face of at least some of the louvers has a convex curvature in at least some areas of the louvers, both in the widthwise direction of the louvered grill and in the vertical direction of the louvered grille.

Abstract: The invention relates to an air guidance system having an air guidance housing and an air passage grating fastened thereto, the air passage grating being held on the air guidance housing by means of a snap-lock connection. In order to simplify maintenance of such an air guidance system it is provided according to the invention that the air passage grating carries at least one latch having a snap-in shoulder that can be engaged in a snap-lock seat of the air passage grating and that the air passage grating pivotally accommodates a handle in a bearing seat, said handle disengaging the latch from the snap-lock seat when set from the locking position to the unlocking position.

Abstract: A latent heat store is provided having a plurality of heat exchanger units (2) arranged alongside one another with each being at least one phase change store in which a heat exchanger fluid with the storage medium flows at least between adjacent heat exchanger units (2). Latent heat store improved heat management is achieved by at least one common intake (10) for supplying the heat exchanger fluid to the heat exchanger units (2) and for dividing this fluid into a plurality of separate partial flow sections and also at least one common drain (11) for discharging the heat exchanger fluid from the heat exchanger units (2) and for bringing all partial flow sections back together such that the heat exchanger units (2) of the stack (13) collectively exposed to the flow are connected in parallel to one another wherein a variety of flow patterns are provided.

Abstract: An apparatus and method are provided for improved utilization of a sputter target in the longitudinal end regions. The focus of erosion in the end regions is widened, thereby extending the useful life of the target. This provides improved efficiency and reduces waste because a greater proportion of the target material in the more expansive central region can be harvested, because the target is utilized for a longer period of time.

Abstract: A condensate evaporator with an electrically heatable accommodation chamber for water of condensation which is produced in a cooling device and is to be evaporated. A design which is as compact and simple is achieved because the accommodation chamber is formed by a tube section on whose outer face at least one heating element which is in thermal contact with the tube section is arranged and at one end of which an inlet for the supplied water of condensation is arranged and at an other end of which an outlet for the steam which is produced from the water of condensation by the heating element is arranged. This invention also relates to a cooling device, in particular for a switchgear cabinet, having a condensate evaporator according to this invention.

Abstract: Methods of preparing heterocyclic triazolium-based nitrate salts by a streamlined process are provided. Such salts offer energetic performance as well as pharmaceutical potential.

Abstract: The present invention provides a hot-trap device (1) comprising an enclosure (2) with at least one inlet (3), at least one outlet (5) at least one heating means (7) and at least one collector means (10) for the conversion of reaction by-products into products, wherein the collector means is arranged within the enclosure between the inlet and the outlet has a diameter that substantially matches the diameter of the enclosure and has at least one opening (18).

Abstract: Provided is a hypergolic bipropellant formed by combining a IL fuel having a dicyanamide anion and a nitrogen-containing, heterocyclic-based cation with an oxidizer for such fuel.

Abstract: A method for cleaning a vacuum pump (10) having a pump chamber (12) with at least one pump rotor (14) includes performing the steps of: a) filling a cleaning liquid (28) into the pump chamber (12), b) distributing the cleaning liquid (28) in the pump chamber (12), c) dissolving impurities with the cleaning liquid (28), d) draining the cleaning liquid (28) from the pump chamber (12).

Abstract: A condensate evaporator with an electrically heatable accommodation chamber for water of condensation which is produced in a cooling device and is to be evaporated. A design which is as compact and simple is achieved because the accommodation chamber is formed by a tube section on whose outer face at least one heating element which is in thermal contact with the tube section is arranged and at one end of which an inlet for the supplied water of condensation is arranged and at an other end of which an outlet for the steam which is produced from the water of condensation by the heating element is arranged. This invention also relates to a cooling device, in particular for a switchgear cabinet, having a condensate evaporator according to this invention.

Abstract: In a device and method for computer-assisted 2D navigation in a medical procedure, parameters of projection matrices of a 3D calibration process of a C-arm unit are used for the 2D navigation.

Abstract: Methods of preparing heterocyclic triazolium-based nitrate salts by a streamlined process are provided. Such salts offer energetic performance as well as pharmaceutical potential.

Abstract: A contamination-resistant sensor element and methods for making the same are provided. A sensor element may include a contamination-resistant coating on at least a portion thereof. The coating may comprise gamma-delta alumina and lithium oxide and may have a thickness of about 100 to about 600 microns and a porosity of about 20 to about 70 percent. The method may include using gamma-delta alumina and lithium oxide to form a mixture, applying the mixture to at least a portion of a sensor element, and temperature treated the mixture to form a contamination-resistant coating on the surface of the measuring cell.