CMOS active pixel sensor (APS) technology has been developed as a potential replacement for charge-coupled devices (CCDs) for solid-state imaging. The CMOS APS has several advantages over CCDs for camera systems including much lower camera power, smaller camera size, lower camera cost, and on-chip functionality. This paper describes the CMOS APS technology.

A new type of image sensor is emerging from the most advanced image sensor R&D laboratories in Japan. This sensor, termed an active pixel sensor (APS), may one day supplant charge-coupled devices (CCDs) in many applications. The charge-coupled device relies on the shifting of charge to read out the image. The active pixel sensor acts like a random access memory (RAM) device wherein each pixel c...

In a wireless sensor networks, many topics have been studied in several filed. Most of them are concentrated on efficient use of energy to prolong the network lifetime. In a special environment like as remote battlefield, desert, forest, it is more difficult to recharging the battery of sensor. In this paper, we propose a density control method in a dense wireless sensor. We prolong the lifetim...

Selecting a partial set of sensor nodes for execution and still maintaining the system sensing coverage is an important issue in wireless sensor networks. The previous research was concentrated on the location-aware sensor networks but little attention has been devoted to the location-free environments. This paper describes an approach to determining active nodes for full coverage without locat...

Thepresent paper discusses active vibration control of a cantilever beam subjected to random base excitation. The smart materials used are piezoelectric patches for both as sensor and actuator, and actuation based on the surface strains. Finite element model of the smart beam is obtained using Euler-Bernoulli formulation. Positive Position Feedback (PPF) controller is proposed for active dampin...

Abstract- Tracking a target which is sensed by a collection of randomly deployed, limited-capacity, and short-ranged sensors is a tricky problem and, yet applicable to the empirical world. In this paper, this challenge has been addressed a by introducing a nested algorithm to track a maneuvering target entering the sensor field. In the proposed nested algorithm, different modules are to fulfill...

Wireless sensor networks have been widely used in many surveillance applications. Due to the importance of sensor nodes in such applications, certain level of protection need to be provided to them. In [1], Wang, Zhang and Liu first formally introduced the self protection problem in wireless sensor networks. A wireless sensor network is p-self-protected, if at any moment, for any wireless senso...

A chip designed in a 0.18 μm CMOS Image Sensor Technology (CIS) is presented which incorporates different pixel design alternatives for Active Pixel Sensor (APS). CIS technology improves characteristics such as sensitivity, dark current and noise, that are strongly layout dependent. This chip includes a set of pixel architectures where different parameters have been modified: layout of active d...

Vision is an important sensor used for mobile robot navigation. One approach to localization which is based on vision is to compute camera egomotion with respect to base images. What characterizes this method of localazation is that its performance varies greatly in different positions. Active navigation is an approach to path and sensing planning which is designed to address varying performanc...