Embodiments described herein generally relate to devices, systems and methods for measuring a volume or number of doses remaining in a drug delivery device that is used for delivering a dose to a patient. In some embodiments, a dose measurement system for measuring the liquid volume in a container includes a light guide disposed and configured to reflect electromagnetic radiation toward the container. The dose measurement system also includes a light guide disposed and configured to emit electromagnetic radiation into the light guide. A plurality of sensors are located in the apparatus that are optically coupleable to the light guide and are disposed and configured to detect the electromagnetic radiation emitted by at least a portion of the light guide. The apparatus also includes a processing unit configured to receive data representing the portion of the detected electromagnetic radiation from each of the plurality of sensors. The processing unit is further operable to convert the received data into a signature representative of the electromagnetic radiation detected by the plurality of sensors.

The invention relates to a method for determining the total volume and/or the true volume and the porosity of objects, wherein a gas chamber of a closed measurement chamber is compressed or expanded, this volume change ΔV in the measurement chamber causes a movement change of a membrane of a transducer, wherein the movement of this membrane of the transducer correlates linearly with the volume change ΔV in the measurement chamber, the mechanical movement of said membrane of the transducer being triggered by at least one frequency, as a function of the volume of an object in a measurement chamber, and the movement change of the membrane being measured by a sensor head. The invention also relates to a device suitable for the method.

The invention relates to a method for determining the total volume and/or the true volume and the porosity of objects, wherein a gas chamber of a closed measurement chamber is compressed or expanded, this volume change ΔV in the measurement chamber causes a movement change of a membrane of a transducer, wherein the movement of this membrane of the transducer correlates linearly with the volume change ΔV in the measurement chamber, the mechanical movement of said membrane of the transducer being triggered by at least one frequency, as a function of the volume of an object in a measurement chamber, and the movement change of the membrane being measured by a sensor head. The invention also relates to a device suitable for the method.

An arrangement for measuring a volume of sample is disclosed. The arrangement includes a first chamber for accommodating the sample; at least one second chamber connectable to the first chamber; a first gas path including a first valve connected to the first chamber and on the other end connected to a gas entry path; a second gas path including a second valve, connected to the second chamber and on the other end connected to the gas entry path; a pressure sensor; a third gas path including a third valve, the third gas path connected to the first chamber and on the other end connected, via the third valve, to the pressure sensor; a fourth gas path including a fourth valve, the fourth path being connected to the second chamber and on the other end connected, via the fourth valve, to the pressure sensor.

An arrangement for measuring a volume of sample is disclosed. The arrangement includes a first chamber for accommodating the sample; at least one second chamber connectable to the first chamber; a first gas path including a first valve connected to the first chamber and on the other end connected to a gas entry path; a second gas path including a second valve, connected to the second chamber and on the other end connected to the gas entry path; a pressure sensor; a third gas path including a third valve, the third gas path connected to the first chamber and on the other end connected, via the third valve, to the pressure sensor; a fourth gas path including a fourth valve, the fourth path being connected to the second chamber and on the other end connected, via the fourth valve, to the pressure sensor.

A process and a device for determining the volume of liquid remaining inside a flexible pouch provided with means for dispensing the liquid to be consumed comprises placing the pouch inside a rigid envelope filled with a known volume V1 of a first measuring liquid having an electrical conductivity C1, during the dispensing of a volume VA of liquid to be consumed, admitting inside the rigid envelope the same volume of a second measuring liquid present outside the rigid envelope and having an electrical conductivity C2 different from the electrical conductivity C1, measuring the electrical conductivity CM of the mixture of the measuring liquids present inside the rigid envelope, determining the volume VA of liquid to be consumed which has been dispensed from the measurement of the electrical conductivity C3, and calculating the volume Vr of liquid to be consumed remaining inside the pouch from the volumes Vi and VA.

Methods, systems, and devices are disclosed for imaging particles and/or cells using flow cytometry. In one aspect, a method includes transmitting a light beam at a fluidic channel carrying a fluid sample containing particles; optically encoding scattered or fluorescently-emitted light at a spatial optical filter, the spatial optical filter including a surface having a plurality of apertures arranged in a pattern along a transverse direction opposite to particle flow and a longitudinal direction parallel to particle flow, such that different portions of a particle flowing over the pattern of the apertures pass different apertures at different times and scatter the light beam or emit fluorescent light at locations associated with the apertures; and producing image data associated with the particle flowing through the fluidic channel based on the encoded optical signal, in which the produced image data includes information of a physical characteristic of the particle.

A non-rigid airship or hybrid air vehicle has a pressure-stabilised envelope (100) that includes at least one ballonet (102, 103). A system is provided for measuring the geometry of the lifting gas enclosure (101) within the pressure-stabilised envelope (100). The system comprises a plurality of sensors (104, 109) located outside the ballonet(s) but inside the envelope, for measuring the geometry of the enclosure. Some of the sensors (104) are arranged to measure an internal surface of the pressure-stabilised envelope (100), and others of the sensors (109) are arranged to measure an external surface of the at least one ballonet (102, 103).

A non-rigid airship or hybrid air vehicle has a pressure-stabilised envelope (100) that includes at least one ballonet (102, 103). A system is provided for measuring the geometry of the lifting gas enclosure (101) within the pressure-stabilised envelope (100). The system comprises a plurality of sensors (104, 109) located outside the ballonet(s) but inside the envelope, for measuring the geometry of the enclosure. Some of the sensors (104) are arranged to measure an internal surface of the pressure-stabilised envelope (100), and others of the sensors (109) are arranged to measure an external surface of the at least one ballonet (102, 103).

Methods and systems for determining caving volume estimations based on logging data and geomechanical models are provided. For example, a system can receive image log data measured during a drilling operation in a wellbore. The system can receive an identification of a breakout in a subterranean formation around the wellbore. The system can determine, using the image log data, a breakout angular width for the breakout. The system can determine a breakout depth for the breakout. The system can determine a caving volume based on the breakout depth and the breakout angular width substantially contemporaneously with the drilling operation. The system can output the caving volume estimation for use in substantially contemporaneously adjusting a drilling parameter for the drilling operation.