Unmanned Aerial Vehicle (UAV) swarm networks have been presented as a promising
paradigm for conducting monitoring, and inter-connecting tasks in unattended or even …

Recently, new ideas for harvesting energy of the sensor nodes from the surroundings are
proposed. As compared to these renewable energy sources, radio frequency (RF) signals …

Wireless sensors emerged as narrowband, resource‐constrained devices to provide
monitoring services over a wide life span. Future applications of sensor networks are …

Wireless sensor networks have a broad variation of applications within the surveillance,
military, atmosphere monitoring and medical fields. Coverage and connectivity of sensor …

One of the first steps to provide security for sensor networks is to pre-distribute cryptographic
keys among sensor nodes for bootstrapping security. Each node can use stored keys to …

Key pre-distribution in nodes is often employed to address the problems of security with a
single secret key and management with pair-wise secret keys in ad hoc and sensor …

Availability is a critical requirement in any modern information system. For many classes of
sensor networks, random deployment cannot be avoided and the associated wireless …

In this paper we propose that the energy efficiency of wireless sensor networks can be
enhanced by optimally selecting number of cluster head in a hierarchical-based routing …

A low profile antenna array designed for Customer Premise Equipment (CPE) at 800 MHz is
studied in this paper. The antenna array consists of two L-shaped monopole antennas and a …

H εκρηκτική ανάπτυξη των ασύρματων επικοινωνιών αύξησε σημαντικά την ανάγκη για
συμπαγείς κεραίες, οι οποίες συνεπάγονται στενό εύρος ζώνης, κακή προσαρμογή και …