Abstract: The invention relates to a method and an arrangement for carrying out construction measures, in particular foundation engineering measures, on a construction site with a number n of construction machines, in particular foundation engineering machines, on which attachment components, in particular construction tools, are fixed in a releasable and changing manner, wherein a number N of attachment components are kept on the construction site, wherein N>n>2.

Abstract: The invention relates to a civil engineering machine for producing a foundation in the ground, which is configured to create a hole in the ground to a specified target depth for forming at least one foundation element in the ground or to introduce at least one foundation element directly into the ground to the specified target depth, comprising a control unit, into which the target depth can be input, and a display device, in particular a screen, on which data on the operation of the civil engineering machine can be displayed by the control unit. According to the invention, it is provided that the control unit is configured to calculate, based on the input target depth and depending on parameters that can be or are input to the control unit for producing of the foundation, an expected target reaching time until the input target depth is reached and to display it by means of the display device.

Abstract: A method for heating a catalytic converter includes a) switching on a compressor; b) at least partially opening an injection valve; c) setting a combustion-air/fuel ratio of ?<1 in combustion chambers; d) detecting an actual value of the oxygen content in the exhaust gas; and e) comparing the actual value with a target value, where the target value corresponds to an exhaust-gas oxygen content that would be set in a region of the catalytic converter if the combustion-air/fuel ratio in the combustion chambers is approximately ?=1, where a manipulated variable output by a controller on a basis of a deviation of the actual value from the target value is kept constant when the actual value reaches one of two limit values of a value range within which the target value is ranged, and where the two limit values deviate from the target value by approximately 3%.

Abstract: The invention relates to a method and a device for separating carbon dioxide from a respiratory gas mixture. The separation is carried out by means of a membrane which acts as a molecule filter.

Abstract: The invention relates to a civil engineering tool for attachment to a civil engineering machine with a carrier, with at least one sensor for acquiring operating data on the civil engineering tool. It is provided according to the invention that arranged on the civil engineering tool is an operating data unit, which is autarkic of the civil engineering machine and which has the at least one sensor and a data storage device, in which the acquired operating data are stored and are retrievable on the civil engineering tool independently of the carrier.

Abstract: A method for heating a catalytic converter includes a) switching on a compressor; b) at least partially opening an injection valve; c) setting a combustion-air/fuel ratio of ?<1 in combustion chambers; d) detecting an actual value of the oxygen content in the exhaust gas; and e) comparing the actual value with a target value, where the target value corresponds to an exhaust-gas oxygen content that would be set in a region of the catalytic converter if the combustion-air/fuel ratio in the combustion chambers is approximately ?=1, where a manipulated variable output by a controller on a basis of a deviation of the actual value from the target value is kept constant when the actual value reaches one of two limit values of a value range within which the target value is ranged, and where the two limit values deviate from the target value by approximately 3%.

Abstract: A method for three-dimensional reproduction of a biological tissue in the framework of tissue engineering. A substrate is provided and primary cells of a first cell type are deposited on the substrate. A first precursor of a substance adhering the cells is arranged on at least a selection of the primary cells of the first cell type. A second precursor of the substance adhering the cells is arranged in a locally targeted manner on the selection of primary cells of the first cell type according to a structure formed by cells of the first cell type in the tissue to be reproduced. The first precursor and the second precursor react with each other to form the substance adhering the cells, which substance adheres the selection of the primary cells of the first cell type according to the structure formed by the cells of the first cell type in the tissue to be reproduced.

Abstract: A water gun comprising a pressure tank, a nozzle, a tube and valve with a valve conduit has an increased shooting range if the pressure tank has an outlet being connected to an inlet of the tube, the tube has an outlet being connected to an inlet port of the valve conduit and an outlet port of the valve conduit is in fluid communication with the nozzle.

Abstract: The invention relates to a working machine and a method for working the ground with the working machine, having a mast, along which, by means of a positioning means, a power rotary head is moved vertically, by which a telescopic Kelly rod having at least two Kelly bars is displaced and guided, wherein, for the purpose of torque transmission, the Kelly bars are provided on their external and/or internal sides with axially running drive keys as well as locking recesses on the drive keys and/or axial latch elements which are moved into the locking recesses for axially locking the Kelly bars or moved out of the locking recesses for unlocking.

Abstract: System for assisting a patient in speaking, comprising at least one ventilation apparatus and a patient interface, the ventilation apparatus comprising at least one controllable respiratory gas source and being designed to identify two or more respiratory phases, at least inspiration and expiration, of the patient, and the patient interface having at least one speaking tube and a respiratory tube and being configured to conduct speaking gas to the patient via the speaking tube and to conduct respiratory gas to and/or from the patient via the respiratory tube. The system is configured to provide speaking gas to the patient at least temporarily in a speaking mode in order to enable speaking.

Abstract: The invention relates to a working machine and a method for working the ground with the working machine, having a mast, along which, by means of a positioning means, a rotary head is moved vertically, by which a telescopic Kelly rod having at least two Kelly bars is displaced and guided. According to the invention the Kelly bars are locked or unlocked automatically by means of a control, wherein by means of a first detection means a rotation angle of at least one Kelly bar is detected and/or by means of a second detection means a force, torque or pressure change is detected in a hydraulic system. By the control a locking and/or unlocking of the Kelly bars is determined depending on the detected rotation angle and/or the detected change.

Abstract: The invention relates to a microbioreactor assembly (01) having a plurality of microbioreactors. The microbioreactor assembly comprises a microtiter plate (02) having numerous wells (09) in a predefined grid arrangement, a closed bottom surface (14) and an open upper face. An insert unit (03) is also provided, which is arranged on the upper face of the microtiter plate (02) and has numerous inserts (11) in the same grid arrangement, each insert (11) engaging in a well (09), and the well (09) being divided into at least two regions (12, 17). Finally, the microbioreactor assembly comprises an activation unit (04), which is placed on the insert unit (03) and has numerous pumps (26), each of which is connected to supply channels (19), which allow the transport of fluid between the two regions (12, 17).

Abstract: The invention relates to a cell culture carrier for cultivating biological cell material (07). The cell culture carrier comprises: a carrier plate (01); a membrane (02), which is supported by the carrier plate (01) and provides a colonization surface (06) for the cell material (07), the colonization surface (06) being permeable for a main flow (10) of a nutrient solution; and a holding cage (03), which is covered by the membrane (02) at an end and into which the cell material (07) can be introduced and through which the main flow (10) can flow. The carrier plate (01) provides a plurality of flow openings (08), which are positioned outside of the holding cage (03) in peripheral distribution and which allow a secondary flow (11) of the nutrient solution, the flow velocity of which secondary flow is greater than the flow velocity of the main flow (10) of the nutrient solution that flows through the holding cage (03) and the colonization surface (06).

Abstract: The present invention relates firstly to a method for reproducing a stem cell niche of an organism. The invention further relates to a reproduction of a stem cell niche of an organism. According to the invention, an image of a tissue of an organism is generated, which tissue comprises at least one stem cell niche. The image is filtered in order to obtain a structural pattern of the imaged stem cell niche. In a further step, a lithographic mask is generated from the structural pattern. According to the invention, a starting material of a substrate is structured by means of indirect or direct application of the lithographic mask, whereby a structured substrate is obtained which represents the reproduction of the imaged stem cell niche of the organism. The reproduction can be characterised as biolithomorphic.

Abstract: The invention relates to a working machine and a method for working the ground with the working machine, having a mast, along which, by means of a positioning means, a rotary head is moved vertically, by which a telescopic Kelly rod having at least two Kelly bars is displaced and guided. According to the invention the Kelly bars are locked or unlocked automatically by means of a control, wherein by means of a first detection means a rotation angle of at least one Kelly bar is detected and/or by means of a second detection means a force, torque or pressure change is detected in a hydraulic system. By the control a locking and/or unlocking of the Kelly bars is determined depending on the detected rotation angle and/or the detected change.

Abstract: A machine and a method for earth-working with a machine, having a mast, along which a top drive can be moved vertically by an adjusting device, through which top drive a telescopic kelly bar is displaceably guided, which has at least one outer kelly bar, which is designed to come to lie on the top drive, and one inner kelly bar, which comprises a rope suspension for a rope, through which the inner kelly bar is moved vertically by a rope winch. The adjusting device for the top drive and/or the main rope winch for the kelly bar is/are automatically controlled, wherein the inner kelly bar is moved relative to the top drive in some areas in a rapid travel mode at a first speed and in some areas in a conservative travel mode, in which the speed is reduced in comparison with the first speed.

Abstract: The present invention relates firstly to a method for reproducing a stem cell niche of an organism. The invention further relates to a reproduction of a stem cell niche of an organism. According to the invention, an image of a tissue of an organism is generated, which tissue comprises at least one stem cell niche. The image is filtered in order to obtain a structural pattern of the imaged stem cell niche. In a further step, a lithographic mask is generated from the structural pattern. According to the invention, a starting material of a substrate is structured by means of indirect or direct application of the lithographic mask, whereby a structured substrate is obtained which represents the reproduction of the imaged stem cell niche of the organism. The reproduction can be characterised as biolithomorphic.

Abstract: A machine and a method for earth-working with a machine, having a mast, along which a top drive can be moved vertically by an adjusting device, through which top drive a telescopic kelly bar is displaceably guided, which has at least one outer kelly bar, which is designed to come to lie on the top drive, and one inner kelly bar, which comprises a rope suspension for a rope, through which the inner kelly bar is moved vertically by a rope winch. The adjusting device for the top drive and/or the main rope winch for the kelly bar is/are automatically controlled, wherein the inner kelly bar is moved relative to the top drive in some areas in a rapid travel mode at a first speed and in some areas in a conservative travel mode, in which the speed is reduced in comparison with the first speed.

Abstract: A method for replicating a structure of a biological tissue provides a plastically deformable film that is subjected to a pressure in order to press it into a mold. The mold comprises formations for pit-like depressions, recesses and notches. The recesses each border on at least one of the pit-like depressions and are opened up. The notches form at least one film hinge in the film. The shaped film is folded into a stack having at least two layers of film, the film hinge forming the folding edge for the folding process. The pit-like depressions are closed along their direction of extension by a neighboring layer of the stack and form each time a capillary. At least two of the opened recesses are arranged one on top of another and form a canal arranged perpendicular to the plane of extension of the film.

Abstract: Embodiments of the present invention provide a memristor having a first electrode, a second electrode and a memristive layer arranged between the first electrode and the second electrode. Thereby, the memristor is adapted to obtain an asymmetrical current density distribution in the memristive layer.