Abstract:
Described herein is a sensor (100) for a coincidence radiation detection device (300). The sensor (100) is formed on a single integrated circuit board (112) and comprises a photomultiplier device (102) powered by an input power signal (114) and configured to receive incident optical pulses of photons (116) from an associated scintillator device (118) and, in response, generate an input electrical signal (120) having corresponding electrical pulses. A charge sensitive amplifier (106) is configured to receive the input electrical signal (120) and output an amplified electrical signal (126) in which the electrical pulses are amplified and stretched in time. An edge-peak detector circuit (108) is configured to detect: (i) a fast rising edge of the electrical pulses; (ii) a beginning of a trailing edge of the electrical pulses; and (iii) a pulse peak value of the electrical pulses. A local microcontroller (110) is provided, which includes: a timing circuit (131) configured to generate timestamp values for each of the detected pulses in response to a detected pulse edge and to synchronise the timestamp values with a reference clock signal (133) to generate timestamp values for the pulses; an analog to digital converter (128) configured to record pulse height values of the electrical pulses; and a communications interface (135) configured to communicate the timestamp values and pulse height values to a memory device.
Abstract:
A simulation system comprising: a plurality of physical components, each corresponding to one of a plurality of physical component types, an attachment panel comprising an arrangement of attachment locations, such that one or more of the physical components are attachable to the attachment panel; a display system configured to provide a visualisation on or proximate one or both of the attachment panel and the plurality of physical components; a capture device configured to capture image data of a current status of the attachment panel and the plurality of physical components; and a controller configured, when at least one physical component is coupled to the attachment panel, to: a) determine a configuration of physical components one or more of which are coupled to the attachment panel; b) create a configuration of virtual components by assigning a virtual component for each physical component of the configuration of physical components; c) identify a user's physical interaction with the configuration of physical components and determine a corresponding change to behavioural properties of the configuration of virtual components; d) apply a selected modelling template to the current arrangement of virtual components to generate a visualisation comprising an indication of a physical effect associated with the change to the behavioural properties; and e) cause the display system to display the visualisation.
Abstract:
A method comprising upgradeable and extendable smart contracts (82, 83, 84) hosted on and executed by decentralised virtual machines (12) of a decentralised network, including: with a processor, generating a first layer (82) of business logic smart contracts stored on the decentralised network and configured to interact with a distributed ledger maintained and validated by the decentralised virtual machines; with a processor, generating a second layer (83) of token control smart contracts stored on the decentralised network and configured to interact with the distributed ledger; with a processor, generating a third layer (84) of data smart contracts stored on the decentralised network and configured to interact with the distributed ledger; with an application programming interface (API) (81), receiving requests and forwarding requests to the first layer (82) of business logic smart contracts; wherein the first layer (82) of business logic smart contracts validates data sent via the API (81) and forwards validated data to the second layer (83) of token control smart contracts, the second layer (83) of token control smart contracts validating the first layer of business logic smart contracts (81) and providing selective access to predetermined functions of the third layer (84) of data smart contracts, the third layer (84) of data smart contracts is configured to modify data and enable a plurality of owners according to a corresponding plurality of percentages to be assigned for each one of the token control smart contracts (83).
Abstract:
Disclosed is an asbestos identification apparatus, comprising an optical component having a magnification factor, for obtaining a magnified image of a sample; an image acquisition means to acquire an image data from the magnified image; and an image processing module which is adapted to receive the image data, to determine whether an asbestos signature is present in the image data.
Abstract:
A powder composition for forming 3D printed article, the composition comprises: an aggregate; a cementitious material selected from Portland cement and/or Calcium Sulfoaluminate (CSA) cement to bind the aggregate when mixed with a binder to form a 3D printed article; and an accelerator selected from calcium aluminate, calcium sulfate hem i hydrate (plaster of Paris) or lithium salt to accelerate setting of the article formed; and a flow control agent to control flowability of the powder. There is also provided a method of forming a 3D printed article, using a 3D printer comprising a powder feeder, a bed for receiving powder from the powder feeder, and a print head for applying a binder to the bed.
Abstract:
The present application discloses a spectroscopy probe for a Raman spectroscopy system, and methods for preparing filters for the probe. A method for forming an SERS substrate which can optionally be used with the probe is also described. The spectroscopy probe is formed using a double-clad optical fibre probe tip, the double-clad optical fibre (DCF) having a single mode core, multimode inner cladding, and outer cladding, and a micro-filter fixed to the distal end of the optical fibre probe tip. The micro-filter has a short pass or band pass filter configured to align with the DCF core to filter silica Raman background generated by laser excitation in the single mode core, and a long pass filter configured to suppress Rayleigh scattering from the sample while allowing Raman scattered wavelengths to be transmitted through the inner cladding.
Abstract:
A dry-mix composition for forming an ambient temperature cured, strain hardening geopolymer composite (SHGC) is disclosed. The dry-mix composition consists of (a) aluminosilicate material that is rich in silica and alumina in an amorphous form and (b) an alkali activator powder. Furthermore, the dry-mix composition is selected to (i) enable the ambient temperature cured SHGC to be formed without addition of liquid activator and (ii) exhibit strain hardening behavior accompanied by multiple cracking behaviour. Also disclosed is An ambient temperature cured, strain hardened geopolymer composite (SHGC) formed by adding water and a method of forming an ambient temperature cured SHGC.
Abstract:
H:\sxd\Interwoven\NRPortbl\DCC\SXD\6709386_1.doc-5/09/2014 - 40 - ABSTRACT The invention relates to materials that exhibit biocidal activity and in particular to surfaces that exhibit novel surface topography that is lethal to cells on contact. The invention also relates to devices comprising such surfaces, to methods of producing the surfaces and to methods of eliminating or reducing cellular survival wherein cells are exposed to the surfaces. In particular the invention relates to a synthetic biocidal surface comprising an array of nanospikes that are lethal to cells on said surface due to piercing of cell membranes by said nanospikes and to a method of producing a synthetic biocidal surface comprising an array of nanospikes that are lethal to cells on said surface due to piercing of cell membranes by said nanospikes, which comprises exposing a silicon comprising substrate surface to reactive-ion etching.
Abstract:
The invention relates to a method of generating an ordered deposition geometry on a surface of a compound optical fibre, which comprises: (a) arranging a plurality of optical fibres and/or compound optical fibres in common orientation and close packed configuration to form a bundle; (b) drawing the bundle under suitable conditions to produce a compound optical fibre of desired diameter; (c) processing the compound optical fibre to produce a substantially planar surface ; (d) subjecting said surface to an etching agent to produce surface relief; (e) subjecting said surface with relief to metal coating. The invention also covers a compound optical fibre having an ordered deposition geometry on a substantially planar surface that is substantially transverse to compound optical fibre longitudinal axis, wherein the compound optical fibre comprises individual optical elements of less than about 1000nm in diameter.