Abstract: According to an example aspect of the present invention, there is provided an apparatus comprising a microelectromechanical, MEMS, capacitor comprising two plates and a gap between the plates, a gas conveyor configured to cause gas to flow through the gap, and readout circuitry configured to measure a capacitance of the MEMS capacitor.

Abstract: Method for calibrating a spectral imaging device comprises forming first calibration light by illuminating a first calibration region of a calibration sample with illuminating light, forming second calibration light by illuminating a second calibration region of the calibration sample with the illuminating light, measuring a first spectrum of the first calibration light by using the spectral imaging device, measuring a second spectrum of the second calibration light by using the spectral imaging device, and determining or verifying a spectral calibration function of the spectral imaging device by comparing the measured spectra with reference spectra. The spectral calibration function specifies a relation, which associates values of a control parameter with actual spectral positions. The first calibration light has a first spectral peak at a first peak wavelength, and the second calibration light has a second spectral peak at a second peak wavelength.

Abstract: A Fabry-Perot interferometer includes a first mirror plate with a first semi-transparent mirror, a second semi-transparent mirror to define an optical cavity together with the first mirror, and one or more first supporting elements to support the first mirror plate, wherein the first mirror plate has a first substantially planar surface and a second substantially planar surface defining the maximum thickness of the first mirror plate, wherein the first mirror plate is bonded to the one or more first supporting elements by three or more joints, wherein each joint is bonded to the first mirror plate at a bonding region, wherein the distance between each bonding region and the first substantially planar surface is greater than 30% of the thickness of the mirror plate, and the distance between each bonding region and the second substantially planar surface is greater than 30% of the thickness of the mirror plate.

Abstract: According to an example aspect of the present invention, there is provided a wafer level package for a device, the package comprising: a first substrate and a second substrate, a sealing structure comprising a seal ring and a bonding layer between the first substrate and the second substrate, and a lateral electrical connection line on a surface of the first substrate, which lateral electrical connection line extends through the seal ring for creating an electrical connection between the device inside the package and an electrical circuit outside the package.

Abstract: A method of selectively catalytically oxidizing dinitrogen oxide present in a gaseous sample, comprising: heating a NiO catalyst to a temperature of at least 250° C.; and bringing the gaseous sample into contact with the heated NiO catalyst to oxidize dinitrogen oxide of the gaseous sample in the presence of the heated NiO catalyst.

Abstract: The invention relates to an acoustically coupled thin-film BAW filter, comprising a piezoelectric layer, an input-port on the piezoelectric layer changing electrical signal into an acoustic wave (SAW, BAW), and an output-port on the piezoelectric layer changing acoustic signal into electrical signal. In accordance with the invention the ports include electrodes positioned close to each other, and the filter is designed to operate in first order thickness-extensional TE1 mode.

Abstract: According to an example aspect of the present invention, there is provided a rapid, economically feasible method for producing continuous films with excellent properties using nanocellulose suspensions at high consistency.

Abstract: An acoustic wave filter device with two-stage acoustic wave filters is provided. Each of the two stages includes a respective acoustic wave filter element. A first acoustic wave filter element (100a) includes a first input electrode (150a), a first output electrode (174a), and a first counter electrode (120a). The first input electrode and the first output electrode are located on a top surface of piezoelectric layer (650), and the first counter electrode is located on a bottom surface of the piezoelectric layer. A second acoustic wave filter element (100b) includes a second input electrode (154b), a second output electrode (174b), and a second counter electrode (120b). The second input electrode and the second output electrode are located on the top surface of the piezoelectric layer, and the second counter electrode is located on a bottom surface of the piezoelectric layer. The two acoustic wave filter elements are connected in series through a common floating electrode (602).

Abstract: An ultrasound sensor apparatus comprises at least one ultrasound transmitter, which outputs ultrasound into fluid, and a frequency controller, which receives information on temperature of the fluid and controls the frequency of the ultrasound output by the at least one ultrasound transmitter as a function of the temperature of the fluid.

Abstract: The present invention relates to an antenna stack comprising a ground plane and a plurality of antenna layers for separate operating frequency bands, the antenna stack comprising i) an antenna on one antenna layer and at least one antenna array on at least one different antenna layer or ii) at least two antenna arrays, each on a different antenna layer. Each individual antenna layer comprises an antenna or an antenna array that operates on a frequency band that is specific to the respective antenna layer and different from frequency band or bands of other antenna layer or layers. The antenna layer comprises antenna elements manufactured by patterning conductor material on a respective flexible and/or bendable sheet of insulating material. Antenna elements on the respective antenna layer is a circularly polarized crossed dipole antenna element or a crossed dipole antenna element that is electrically configurable into circularly polarized or linearly polarized configuration.

Abstract: A method and apparatus for treating raw material in a fluidized bed reactor comprising at least two bed materials are provided. The second bed material is subjected into a lower part of the fluidized bed reactor that includes first the bed material having electroconductive material. A fluidizing agent is fed to a bottom of the fluidized bed reactor, and the fluidizing agent flows through the lower part of the reactor to an upper part of the fluidized bed reactor. The first bed material is inductively heated and heat is transferred from the first bed material to the fluidizing agent and/or to the second bed material in the lower part of the reactor. The heated second bed material is fluidized by the fluidizing agent to the upper part of reactor. The raw material is fed to the upper part of the reactor where the raw material is treated.

Abstract: An optical assembly for realizing horizontal and vertical spot-size conversion to couple light from a thin waveguide to a thick waveguide is disclosed. The assembly comprises at least one first thin waveguide with a first section having a first optical mode field and a horizontal spot-size expansion section providing spot-size conversion for a first horizontal dimension of said first optical mode field of a light beam propagating in said first waveguide, and at least one second thick waveguide with a second section having a second optical mode field and a horizontal spot-size reduction section providing spot-size conversion for a second horizontal dimension of said second optical mode field of a light beam propagating in said second waveguide.

Abstract: According to an example aspect of the present invention, there is provided an apparatus for an antenna, comprising, a first power amplifier and a second power amplifier and a common ground between the first power amplifier and the second power amplifier, wherein a Radio Frequency, RF, output of the first power amplifier is coupled to the common ground and a RF output of the second power amplifier is coupled to the common ground.

Abstract: A hybrid millimeter-wave Wilkinson divider comprises an input port (1), a first output port (2), a second output port (3), and transmission lines connecting the input port (1) to the first and second output ports (2, 3) implemented by transmission lines in a carrier substrate (PCB, 31). An isolation resistor of the Wilkinson divider connected between the first and second output ports (2, 3) is integrated in a monolithic micro-wave integrated circuit (MMIC) chip (40) installed on the carrier substrate. On the MMIC chip the isolation resistor is connected between RF input metal pads. A compensation circuit for parasitic capacitances caused by the RF input metal pads is provided on the MMIC chip (40) so that the on-chip resistor appears as a pure resistance to the output ports (2, 3) of the Wilkinson divider on the carrier substrate (PCB, 31).

Abstract: The invention relates to an apparatus and a method for enhancing dissolution of gas in liquid. The apparatus comprises an outer structure and at least one inner structure, at least one gas inlet for injecting gas to a gas space between the outer and inner structures, a wall of the inner structure having holes with the gas arranged to flow through the holes into the inner structure, at least one liquid inlet for feeding liquid into the inner structure to provide a swirl flow arranged to capture gas bubbles of the gas from an inner surface of the wall to form a liquid-gas mixture, and the inner structure designed such that volume of space inside the inner structure increases in the direction of the liquid flow, and at least one outlet for discharging the liquid-gas mixture out from the apparatus. Further, the invention relates to the use of the apparatus.

Abstract: A method and a process arrangement for producing hydrocarbons from plastic-based raw material by a gasification in an integrated process The integrated process includes a gasification unit for forming a gasification product, a steam cracking unit for forming a cracking product and a recovery unit for recovering hydrocarbons. The plastic-based raw material is gasified with steam in the gasification unit having at least one fluidized bed gasifier and the gasification product is formed, the gasification product is cooled at least partly for slowing and/or stopping the chemical reactions after the gasification, The gasification product is supplied to a quench tower of the gasification unit in which the gasification product is treated and condensable components are removed from the gasification product forming a treated gasification product, and the treated gasification product and the cracking product of the steam cracking unit are supplied to the recovery unit for separating and recovering hydrocarbons.

Abstract: A single-screw extruder and method are disclosed wherein the extruder includes a cylindrical rotor member arranged in a barre, and a drive system for rotation of the rotor member in the barrel. The extruder includes an outlet-provided with a die, having an outer ring arranged to the barrel, and an inner die part, the die establishing a flow channel that is continuously circular in all its cross-sections.

Abstract: According to an example aspect of the present invention, there is provided a method for foam assisted drying of nano- and microfibrillated cellulose, which is easily up-scalable and cost-efficient.

Abstract: A light source device includes a first light source to provide a first input light beam in the direction of a central axis of the light source device, a second light source to provide a second input light beam in the direction of the central axis, a central reflector, a catadioptric reflector to focus light of the first input light beam to the central reflector, and to focus light of the second input light beam to the central reflector, and at least one actuator to change the angular position of the central reflector, so as to cause the central reflector to form an output beam by sequentially reflecting light of the first input light beam and light of the second input light beam to the axial direction.

Abstract: According to an example aspect of the present invention, there is provided a method for producing an oxidised lignin based high performance surface active agent in techno-economically feasible manner within kraft pulp mill without interfering the main process.