electrochemical aptamer-based sensors attract a lot of interest as useful methods because of their low cost, accuracy, sensitivity, and simplicity. an electro-active redox molecule comprises the main part of the electrochemical-based sensors. ferrocene is one of the most popular redox molecule used in biosensor fabrication. but, instability of ferrocenium ion in strong nucleophilic reagents and...

In wireless sensor network applications where data gathered by different sensor nodes is correlated, not all sensor nodes need to be active for the wireless sensor network to be functional. Given that the sensor nodes that are selected as active form a connected wireless network, the inactive sensor nodes can be turned off. Allowing some sensor nodes to be active and some sensor nodes inactive ...

The four-image gravitational lens system MG 0414+0534 was observed with the GHz images reveal structure in the components which is consistent with that seen at other wavelengths. There was no detection of other extended emission, nor were there detections of the lensing galaxy or the " component x " seen in optical images. Detections of polarized emission show that the fractional polarized inte...

This work describes a portable multi-color fluorescence detection system based on a CMOS image sensor and polarization signal isolation. Taking advantage of the wavelength independent nature of the cross-polarization scheme, microparticles with different emission can be excited and detected simultaneously. By changing excitation light polarization the detection can be switched between bright an...

In this paper we describe how the combination of several vision sensors can be used to track multiple human targets in a typical surveillance situation. The experimental system devised is made up of a xed camera and a binocular active vision system. The xed camera is used to provide the system with peripheral motion detection capabilities. The human activity is monitored by extracting several p...

In this paper, we propose a novel method to estimate the slant of omni-directional image sensors which can acquire images of an environment with a FOV close to 360◦×180◦. The proposed method consists of two steps: a low resolution voting followed by a least squares method (LSM). First, the direction of each edge pixel in the omni-directional image is computed and projected to the plane of Z = 1...