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This paper presents GEMINI, an entire read-out System-on-Chip (SoC) to be used with the Triple Gas-Electron Multiplier (GEM) detector. Designed in CMOS 180 nm technology, GEMINI pushes towards the state-of-the-art for this peculiar detector front-end, as regards the count rate and detector pixel parasitic capacitance sustainability. It is composed of 16 channels, each performing a charge-to-voltage...
All living body has been shown to emit radiation into space surrounding their body. The radiation field encloses the physical body and emits the characteristics of frequency radiation. This study discusses the analysis of human body radiation wave on the human torso and compares their frequency characteristics between genders. At first, the characteristic of radiation frequency is determined by employing...
Fraud detection in telecommunications is an area where pattern recognition and so called “intelligent” techniques have found widespread use. Due to fraud, companies suffer not only direct economic losses but also the risk of bad publicity. In this paper real cases of fraud are being treated in order to develop a detection system with low number of false alarms and good sensitivity. Call data records...
The application of adaptive systems trained in a supervised manner to approximate the Neyman-Pearson detector is considered. The general expression of the function approximated when using the LMSE criterion is calculated. To evaluate the sensitivity of the decision rule based on this function to threshold variations, a novel strategy is proposed based on the calculus of the partial derivative of the...
In the paper, we report a high photoexcited carrier multiplication photodetector operating at room temperature. The photodetector has double AlAs barriers in which a layer of InAs self-assembled quantum dots and thin quantum well is embedded in the center of the GaAs quantum well. Unlike previous AlGaAs QD-RTD, its shows high sensitivity to the weak light irradiation at low bias voltage and the operating...
In this paper we present and evaluate a semiautomatic labeling prototype to enable the creation of fully labeled energy disaggregation datasets from sub-metered data. Our results advocate in favor of our approach and show that it is possible to extract individual appliance transitions with considerable precision, as long as the individual appliance information is present in the sub-metered data, and...
In this paper, a hybrid integrated detector system is presented. The system of the detector includes waveguide to microstrip transition, watching network, diode and low pass filter (LPF). The waveguide to microstrip transition is implemented by probe transition. The beam lead detector diode HSCH-9161 is adopted to build a zero-bias direct detector. An accurate physical model of diodes is established,...
This paper presents a novel architecture for a patient-specific epileptic seizure onset detector using scalp electroencephalography. The proposed architecture exploits the benefits of both channel selection and feature enhancement to improve the detector performance. The novel architecture results in higher energy difference between the pre-seizure and seizure states and hence performs better in terms...
This paper reports a cantilever with comb structure, inspired by a bristled wing of thrips which acts as a continuous membrane wing because of the effects of low Reynolds numbers. The comb structures are formed at the edges of the cantilever and its surrounding frame. When differential pressure is applied to the cantilever, both comb structures act as airflow suppression through the gap. The leakage...
Photoconductive terahertz detectors based on single GaAs/AlGaAs core-shell nanowire have been designed and fabricated. The devices were characterised in a terahertz time-domain spectroscopy system, showing excellent sensitivity comparable to the standard bulk ion-implanted InP receiver, with a detection bandwidth of 0.1 ∼ 0.6 THz. Finite-difference time-domain simulations were performed to understand...
The setup of PET scanners usually requires an external positron source. A correct setup procedure has to ensure that the detectors are calibrated for gain adjustments, photopeak locations, and positioning maps for individual detector crystals. In order to verify the quality of the setup on a daily basis, daily quality checks are performed where the variations are checked with an external source and...
Before the image reconstruction process takes place, emission data from a PET scanner must be corrected for scatter and changes for detector sensitivity. Normalization process should take care of the variations in the detector sensitivity. Because of the need of high statistics for large number of line-of-responses (LORs), component-based normalization method was implemented in the state-of-the-art...
The Multimodal Imaging of Neurological Disorders (MINDview) project aims to develop a high resolution and sensitivity dedicated brain Positron Emission Tomography (PET) system capable of visualizing neurotransmitter pathways and their disruptions for mental disorders for diagnosis and treatment follow-up. Moreover, this compact PET system should be fully compatible with a Magnetic Resonance Imaging...
Edge illumination (EI) X-ray phase-contrast imaging has great potential for applications in a wide range of research, industrial and clinical fields. The optimization of the EI experimental setup for a given application is therefore essential, in order to take full advantage of the capabilities of the technique. In this work, we analyze the dependence of the angular sensitivity, spatial resolution...
Modern small-animal SPECT systems use multiple pinhole apertures per detector to obtain high sensitivity while still maintaining high resolution. This resolution is a combination of aperture resolution combined with detector resolution, which is mitigated by magnification. Higher magnification results in better resolution, but fewer apertures per detector. When multiple apertures project onto the...
We proposed to explore extremely fast digital switching devices used in telecommunications for use as photon counting, energy resolving x-ray detectors. The HEMT (High Electron Mobility Transistor), used in ultra-fast switches and low noise amplifiers, offers a very low noise and high frequency operation. For this study a HEMT-based photon-counting energy-resolving ultra-fast x-ray detector with improved...
Gamma ray detectors merging continuous and pixelated crystal arrays are described. We show a pilot study about the detector performance of an innovative scintillation design that simultaneously uses both a continuous and a crystal array. This novel idea is the base of a high-resolution and high-sensitivity gamma ray detector. Alternatively monolithic or crystal arrays can be mounted on the front or...
A new detector is being developed at the National Superconducting Cyclotron Laboratory (NSCL) to measure low energy charged-particles from beta-delayed particle emission. These low energy particles are very important for nuclear astrophysics studies. The use of a gaseous system instead of a solid state detector decreases the sensitivity to betas while keeping high efficiency for higher mass charged...
The ZnS scintillator-based two-dimensional detector was developed for time-of-flight neutron imaging with a high spatial resolution and with a low gamma-ray sensitivity. The developed detector based on neutron counting method exhibited a high spatial resolution of less than 100 µm in full width at half maximum with a moderate count rate capability of several tens kcps. Its low gamma-ray sensitivity...
The possibility was studied of using highly efficient heavy inorganic oxide solid-state scintillation detectors for the detection of mixed gamma-neutron radiation. In the detection of gamma-neutron radiation, the gamma detection efficiency for such detectors reaches 70–80%, with neutron detection efficiency not less than 40%. Detection efficiencies were measured for the heavy oxide scintillator crystals...
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