-The proposed paper shows existing problems in VCO’s and synthesizers due to the nonlinearities in the active devices and external integrated circuits. This paper proposes a design guidance on how to minimize such effects in oscillators by using nonlinear, rather than linear, tools. In synthesizers, the reference frequency and its harmonics will mix with the output frequency in the phase detect...

Design of a new intelligent driver assistance system based on traffic sign detection with Persian context is concerned in this paper. The primary aim of this system is to increase the precision of drivers in choosing their path with regard to traffic signs. To achieve this goal, a new framework that implements fuzzy logic was used to detect traffic signs in videos captured along a highway f...

A multiple-detector system for powder diffraction using synchrotron radiation was built and has been operated at the Photon Factory in Tsukuba since May, 1995. The optics design is based on a flat-specimen-reflection geometry using parallel-beam, and the intensity data are collected by using asymmetric 2@stepscanning at a fixed incident angle. The multiple-detector system makes it possible to c...

In this paper we study the implementability of different classes of failure detectors in several models of partial synchrony. We show that no failure detector with perpetual accuracy (namely, P , Q, S, and W) can be implemented in any of the models of partial synchrony proposed in [3] and [5] in systems with even a single failure. We also show that, in these models of partial synchrony, it is n...

X-ray photon correlation spectroscopy (XPCS) provides an opportunity to study the dynamics of systems by measuring the temporal fluctuations in a far-field diffraction pattern. A two-dimensional detector system has been developed to investigate fluctuations in the frequency range of several Hz to kHz. The X-ray detector system consists of a thin 100 microm scintillation crystal coupled to a Gei...

To improve the performance of a quantum key distribution (QKD) system, high speed, low dark count single photon detectors (or low noise homodyne detectors) are required. However, in practice, a fast detector usually is noisy. Here, we propose a “dual detectors” method to improve the performance of a practical QKD system with realistic detectors: the legitimate receiver randomly uses either a fa...

A position sensitive detector for 9 MeV gamma rays has been developed as part of a contraband detection system for airports. The system images contraband, such as explosives or drugs, in a geometry similar to medical x-ray computed tomography. A point source of gamma rays shines through an unknown object. Transmission projections of the areal density of detected gamma rays are reconstructed int...

The paper describes a system for controlling a virtual mouse using the mioelectric signal from voluntary contractions of the masseter and temporal muscles. The average energy of each of the data packets is compared to a threshold, established by a process of personal calibration executed before starting the system. The threshold energy value was computed using two different adaptive techniques:...

Typical freeway inductance loop detection systems, under normal operation, aggregate individual loop detector actuations sampled at 60 Hz into 20 second or 30 second average velocity, flow, and lane occupancy measurements. While such aggregations are appropriate for serving as inputs to control system algorithms, and save disk space for archiving loop data, much useful data regarding individual...