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There are several evidence of magnetic field alterations that have been registered instants before seismic activity, in different parts of the world. Under the hypothesis that there is a relation between both phenomena, a multiple disciplinary project is being developed for verifying this statement. In this paper, a prototype for a data acquisition system is presented for obtaining valuable information...
The article deals with algorithm design for object detection and identification using common mobile phone optical sensor. Final algorithm was implemented into the robotic device for visual navigation. Mobile phone platform is based on Android operating system. Several measurements were realised for evaluation of accuracy of object detection depending on different distances. Article includes the description...
Unattended ground sensors (UGS) are widely used for persistent, surveillance that detects potential threats from intruders without generating false alarms. Battery life is the limiting factor for solutions using digital processing. A 40nW subthreshold analog CMOS (complementary metal oxide semiconductor) chip is fabricated and tested, that wakes up a threat classifying stage. Subthreshold circuits...
The emergence of Internet of Things (IoT) has brought forth new opportunities by seamlessly integrating the physical world using computing, sensing, and wireless networks, transforming it into a cyber-physical system. An essential building block enabling an IoT is a sensing system. The use of “near-field communication (NFC)” has gained attention in recent years, as it enables low-power short-range...
Parking is almost limited and expensive in every metropolitan city of the world. Finding a vacant car parking space is becoming difficult owing to the fact that innovative parking system has not gained much popularity especially in some developing countries. With a prolific increase in number of public as well as private transportation on the road, traffic problems bound to exist. To make this problem...
Local variations are increasingly important in new technologies. This paper presents the design of adaptive circuits based on the concept of Adaptive Body Bias Islands and a Forward and Reverse Body Bias Generator for FDSOI technology. The proposed Body Bias generator design, based on a DLL, allows a 70% area reduction compared to the DAC-based conventional design and reduces local variability by...
A tracked crawler robot using body heat detection and a purpose built analogue tracking circuit is designed in this work. The infrared detection module consists of a single dual element pyroelectric infrared sensor. The drive and steering control system is designed using a single chip 74HCXX Quad 2-input NAND gate as the logic controller and providing constant forward propulsion whilst in real time...
Modern signals in for instance wireless communication systems and radars use very complex modulation with high peak-to-average ratio. Other signals, such as in reverberation chambers with mode stirring, vary very fast with a high dynamic range. Conventional probes, using thermocouples or diode detection, show wrong measurement results due to the slow response time of the detector or the analog-to-digital...
Diode detectors and thermocouple detectors are conventionally used to measure electromagnetic field strength. Both detectors have some disadvantages for applications where a fast response and a high dynamic range is required. The diode detector is limited in dynamic range. The dynamic range is important when considering modern pulsed wireless systems with a high peak-average ratio. The thermocouple...
Surface acoustic wave (SAW) devices are used as sensing elements in the best performing portable chemical detectors. The SAW device, with a selectively absorbing chemical coating, serves as a mass sensor which preferentially responds to various chemical exposures. To obtain the highest performance, a number of criteria must be optimized, including SAW microwave insertion loss, impedance matching,...
Deep-space Optical Terminals (DOT) is a concept for providing bi-directional communication between a spacecraft at planetary distances and ground. The objective is a system that delivers 10 times the data-rate of a state-of-the-art Ka-band system while putting a comparable mass and power burden on the spacecraft. Here we give an overview of the concept for the Ground Laser Receiver (GLR) terminal...
In this paper, a new method of resistance-examining for the results of field flow fractionation is presented, which can be used for separating resulting checking of separation technology using liquid separating carrier such as FFF, liquid chromatogram analysis, and so on. There is the difference of the detector with a detector having been used, which is that Wavelet Analysis has been used at the detector,...
The research developed an architecture and experimental system for autonomously operating a web of Earth sensing devices. Example sensing devices include orbiting spacecraft, ground surface sensors, ocean surface sensors, ocean subsurface sensors, wheeled vehicles, fixed ground systems, weather balloons, and aircraft. A wide variety of sensors, sensor platforms, and operational characteristics (e...
In this paper, a new method of resistance-examining for the results of field flow fractionation is presented, which can be used for separating resulting checking of separation technology using liquid separating carrier such as FFF, liquid chromatogram analysis, and so on. There is the difference of the detector with a detector having been used, which is that Wavelet Analysis has been used at the detector,...
Underwater surveillance against small and low signature targets is challenging, especially in disturbed and shallow water areas such as harbors. Today the most frequently used system for surveillance in harbors is active sonar. However, the detection range of an active system can rapidly degrade due to changes in the sound propagation conditions and in the ambient noise. We focus our research on how...
The DEPFET is a new type of active pixel particle detector. A MOSFET is integrated in each pixel providing the first amplification stage of the readout electronics. Excellent noise parameters are obtained with this layout. The DEPFET sensor will be integrated as an inner detector in the BELLE II experiment. A flexible measuring system with a wide control cycle range and minimal noise was designed...
The high-resolution radar echo is modeled as a range-spread target. Based on the generalized likelihood ratio test design procedure, the range-spread target detection in spherically invariant random vector clutter is addressed. And a binary integrator with constant false alarm rate property is proposed to detect the whole range-spread target, after single target scatterer detection in each range cell...
Continuous miniature crystal element (cMiCE) detectors are a potentially lower cost alternative to high resolution discrete crystal PET detector designs. We report on performance characteristics of a prototype PET scanner consisting of two cMiCE detector modules. Each cMiCE detector is comprised of a 50 mm by 50 mm by 8 mm LYSO crystal coupled to a 64 channel multi-anode PMT. The cMiCE detectors use...
The usual methods for state estimation of a continuous time system require the precise value of the output variable at all instants of time, or at equally spaced sampling instants. In this work an estimation technique is introduced for Linear Time Invariant (LTI) systems, when the only information on the output variable consists of the time instants at which it has reached certain fixed threshold...
A study of the performance of four zero-velocity detectors for a foot-mounted inertial sensor based pedestrian navigation system is presented. The four detectors are the acceleration moving variance detector, the acceleration magnitude detector, the angular rate energy detector, and a novel generalized likelihood ratio test detector, refereed to as the SHOE. The performance of each detector is assessed...
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