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The determining problem of several fracton mixture srtucture of materials grinding in the gas jet mill is considered. The problem is solved by comparing the standard deviation of the standart power spectral density of acoustics signals of individual fractions and of the mixture ones.
Indoor positioning systems provide location information without the ability to use GPS. Indoor positioning faces challenges of accuracies and pervasiveness. In this paper, we present SilentWhistle, a mobile system that incorporates acoustic information and motion traces on smart phones to locate users. SilentWhistle does not expose the identity of a mobile device as does Bluetooth or Wi-Fi communications...
Wirelessly networked systems of implantable medical devices endowed with sensors and actuators will be the basis of many innovative, sometimes revolutionary therapies. The biggest obstacle in realizing this vision of networked implantable devices is posed by the dielectric nature of the human body, which strongly attenuates radio-frequency (RF) electromagnetic waves. In this paper we present the first...
This paper will discuss an embedded system for Structural Health Monitoring (SHM). The system designed is a working proof of concept prototype made for an SHM system using Piezoelectronic transducers as the sensors. The system uses pulse-echo and pitch-catch techniques to find the location of damage and the width of the damage. If damage is present, the system will generate an email and send to the...
This paper presents a new technology for designing, simulation, implementation and validation of a driverless vehicle system with the use of the Arduino microcontroller, ultrasonic sensors and stepper motors are integrated to Lyapunov based control scheme. The goal is specifically to develop a driverless vehicle system which is able to move from an initial to target location in an obstacle free environment...
Collision warning and avoidance is a well-established area of research for the automotive industry. However, there is little research towards vitally important collision warning systems for cyclists, who are increasingly jeopardized by motorists on urban roads, especially as quiet, fast electric vehicles become more popular. This paper describes the hardware and software of a low-cost collision warning...
This paper presents the results of an indoor localization experiment that uses spread spectrum modulated audio signals. Indoor spaces do not have line-of-sight to global navigation satellite systems and do not have a truly universal localization system to allow mobile devices to localize themselves. Previous approaches focused in using custom made hardware with several types of signals that, even...
Assisted living for people with disabilities remains a current research challenge. Many systems have been developed to help disabled and frail people gain their self-sufficiency during their activities of daily living (ADL). In this article, we propose a new design concept to help visually impaired (VI) elderly patients move in their home environment. The system is made of a light-weight medical walker...
It is important to develop a communication-efficient solution to manage data distribution modeling in an environmental sensor system supported by a clustered structure of the network. Thus, sensor networks present significant systems challenges involving the use of large numbers of resource-constrained nodes operating essentially unattended and exposed to potential local communication failures. MEMS...
Modern armed forces are currently transforming into flexible rapid action forces. In international activities typically very few ships need to patrol a large sea area. Effective solutions are needed in order to develop and maintain capabilities for remote coastal monitoring. A network of underwater nodes can rapidly be deployed and fill these gap. In this context a group of leading European Research...
Currently the interest in underwater acoustic communication is growing rapidly as more and more underwater monitoring systems are deployed around the world. In order to cope with the challenges of the complex underwater acoustic channel many node platforms, networking protocols, and signal processing algorithms have been proposed. However, many of these protocols are still in the simulation stage...
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