Recent years have witnessed pilot deployments of inexpensive wireless sensor networks (WSNs) for active volcano monitoring. This paper studies the problem of picking arrival times of primary waves (i.e., P-phases) received by seismic sensors, one of the most critical tasks in volcano monitoring. Two fundamental challenges must be addressed. First, it is virtually impossible to download the real...

Deception Island is an active volcano located in the south Shetland Islands, Antarctica. It constitutes a natural laboratory to test geophysical instruments in extreme conditions, since they have to endure not only the Antarctic climate but also the volcanic environment. Deception is one of the most visited places in Antarctica, both by scientists and tourists, which emphasize the importance of...

A volcano observatory that is monitoring an erupting volcano(es) needs as much relevant data as it can get in a timely manner. InSAR has, potentially, a major role to play in delivering information on ground deformation and topographic change that can feed into the crisis management process. The Montserrat Volcano Observatory (MVO) has been observing the ongoing eruption of the Soufriere Hills ...

in recent years, the plasma antenna is a new technology for replacing the metal antennas that have been designed with better performance. in the steady state, the radiation pattern of a plasma antenna will be similar to the case of metallic antennas with the same form, size and performance at the same frequency and power. by sweeping the parameters in the plasma tube, we can change the operatin...

Hazard mapping in poorly known volcanic areas is complex since much evidence of volcanic and non-volcanic hazards is often hidden by vegetation and alteration. In this paper, we propose a semi-quantitative method based on hazard event tree and multi-hazard map constructions developed in the frame of the FP7 MIAVITA project. We applied this method to the Kanlaon volcano (Philippines), which is c...

conclusions the research revealed that nonsmokers showed better mental health and dyadic adjustment than smokers, thus suggesting that smoking endangers and can impair the tranquility of families and that smoking also threatens the dyadic adjustment of couples. background the mental health and dyadic adjustment of smokers is a matter of serious concern which brings many demerits on mental healt...

cigarette smoke is injurious to both oral cavity and internal body environment. saliva is the firstbody fluid to encounter the dangerous smoke. the aim of our present study was, therefore, toevaluate the influence of smoking on the antioxidant activity of saliva of healthy smokers.antioxidant capacity of saliva was determined using different methods in the centrifuged saliva from25 male smokers...

Dielectric Resonator Antennas (DRAs) have received increased interest in recent years for their potential applications in microwave and millimeter wave communication systems. DRAs are normally used with the support of a ground plane. The radiation and impedance properties therefore depend not only on their physical dimensions and dielectric properties, but also on the size of the ground plane. ...

In this paper a dual band and high gain H-plane horn antenna implemented by substrate integrated waveguide (SIW) using a single layer thin substrate is introduced. The proposed antenna consists of five parts of rectangular waveguide with different width arranged in a staircase manner to allow mode combination of fundamental and higher propagating modes of the structure. By adjusting the length ...