Abstract: A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the flow of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Abstract: A detector inlet for providing a sample to an analytical apparatus for detecting an aerosol, the detector inlet comprising; an intake for inhaling a flow of gaseous fluid to be sampled by the analytical apparatus; a mixing region; a first conduit for carrying a first part of the flow of gaseous fluid from the intake to the mixing region; a second conduit for carrying a second part of the flow of gaseous fluid from the intake to the mixing region; and a heater configured to heat the first part more than the second part, and wherein the detector inlet is configured to combine the first part with the second part in the mixing region.

Abstract: A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the flow of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Abstract: A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the how of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Abstract: A detector inlet for providing a sample to an analytical apparatus for detecting a substance of interest, the detector inlet comprising a plenum for allowing passage of a flow of a gaseous fluid, the plenum comprising a sampling volume a sampling inlet arranged in the plenum and arranged to collect samples of the gaseous fluid from the sampling volume and to provide the samples to the analytical apparatus, wherein the flow carries particulates and a flow director arranged to create circulatory flow of the gaseous fluid around the plenum encircling the sampling inlet thereby to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet without entering the sampling volume.

Abstract: An ion mobility spectrometer comprising an ioniser for ionising a sample; a detector separated from the ioniser by a drift chamber along which ions can travel from the ioniser toward the detector; a gate for controlling the passage of ions from the ioniser to the drift chamber; an ion modifier arranged between the ioniser and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

Abstract: A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the how of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Abstract: A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the flow of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Abstract: An ion mobility spectrometer comprising an ioniser for ionising a sample; a detector separated from the ioniser by a drift chamber along which ions can travel from the ioniser toward the detector; a gate for controlling the passage of ions from the ioniser to the drift chamber; an ion modifier arranged between the ioniser and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

Abstract: An ion mobility spectrometer comprising an ionizer for ionizing a sample; a detector separated from the ionizer by a drift chamber along which ions can travel from the ionizer toward the detector; a gate for controlling the passage of ions from the ionizer to the drift chamber; an ion modifier arranged between the ionizer and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

Abstract: A detector inlet for providing a sample to an analytical apparatus for detecting a substance of interest, the detector inlet comprising a plenum for allowing passage of a flow of a gaseous fluid, the plenum comprising a sampling volume a sampling inlet arranged in the plenum and arranged to collect samples of the gaseous fluid from the sampling volume and to provide the samples to the analytical apparatus, wherein the flow carries particulates and a flow director arranged to create circulatory flow of the gaseous fluid around the plenum encircling the sampling inlet thereby to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet without entering the sampling volume.

Abstract: A detector inlet for providing a sample to an analytical apparatus for detecting an aerosol, the detector inlet comprising; an intake for inhaling a flow of gaseous fluid to be sampled by the analytical apparatus;a mixing region;a first conduit for carrying a first part of the flow of gaseous fluid from the intake to the mixing region;a second conduit for carrying a second part of the flow of gaseous fluid from the intake to the mixing region; and a heater configured to heat the first part more than the second part,and wherein the detector inlet is configured to combine the first part with the second part in the mixing region.

Abstract: A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume,and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the flow of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Abstract: Systems and techniques for cleaning a corona discharge point are described. A controller (150) can be operatively coupled to a corona discharge point (108) to control the operation of the corona discharge point (1089. The controller (150) and the corona discharge point (108) can be included with, for example, an ion mobility spectrometry (IMS) system (100). The controller (150) can be used to operate the corona discharge point (108) at an operating voltage for a first time interval, with or without an additional higher pulse voltage, to produce a corona discharge, and to operate the corona discharge point (108) at a cleaning voltage greater than the operating voltage for a second time interval subsequent to the first time interval to produce a corona discharge.

Abstract: An ion mobility spectrometer comprising an ioniser for ionising a sample; a detector separated from the ioniser by a drift chamber along which ions can travel from the ioniser toward the detector; a gate for controlling the passage of ions from the ioniser to the drift chamber; an ion modifier arranged between the ioniser and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

Abstract: Systems and techniques for cleaning a corona discharge point are described. A controller (150) can be operatively coupled to a corona discharge point (108) to control the operation of the corona discharge point (1089. The controller (150) and the corona discharge point (108) can be included with, for example, an ion mobility spectrometry (IMS) system (100). The controller (150) can be used to operate the corona discharge point (108) at an operating voltage for a first time interval, with or without an additional higher pulse voltage, to produce a corona discharge, and to operate the corona discharge point (108) at a cleaning voltage greater than the operating voltage for a second time interval subsequent to the first time interval to produce a corona discharge.

Abstract: In accordance with an embodiment, an edge processor may be configured to communicate with intelligent mobile devices via one or more mobile device networks. The edge processor may also be configured to access an entity's applications and data via a network of the entity. The edge processor may include one or more embedded applications. The edge processor may also include a command processor that is configured to route requests received from the intelligent mobile devices to the one or more embedded applications. The edge processor may also include at least one agent broker component that is configured to broker requests made from the one or more embedded applications to the entity's applications and data. At least one intelligent agent may facilitate communication between the one or more embedded applications and the entity's applications and data via the at least one agent broker component.

Abstract: An IMS or other detection system has an entry gate (3) controlled by a pseudo-random binary sequence that is bit-flipped to reduce noise. Matrix algebra is used to carry out deconvolution and analysis of the cell output.

Abstract: A display device, such as a liquid crystal display, can be integrated into each key of a keyboard, numeric keypad, or other keyed input device. The display device can display a symbol when it is active. For example, a “1” when pressing that key will input a “1” and a “!” when that key input a “!.” In addition to a display device, each key top can include a key cap, generally made of a transparent plastic so that the display can be seen. The key cap can be formed in the shape of a key and will generally be the portion of the input device that a user presses on to input information. A plurality of key caps can be combined to form a keyboard, numeric keypad, or other keyed input device. Throughout the rest of this application the term keyboard will generally be used in place of keyboard, numeric keypad, or other keyed device. In another embodiment a display device can be overlaid with a key cap skin to form a keyed input device, such as a keyboard. The display device can be a touch sensitive screen.

Abstract: A system and method for retracting an electronic mail document stored in a mail database of a Server sent from a sender to a recipient. A fetch monitor at the Server monitors activity on the mail document and marks the status of the mail document accordingly. A fetch control issues a request to retract the mail document to a fetch queue at the Server. The request is retrieved by a fetcher at the Server from the fetch queue, which then proceeds to retract the mail document based on the marked status of the mail document, and then reports the retraction.