Wireless Sensor Networks (WSNs) are networks of small devices with limited resources which able to collect different information for a variety purposes. Energy and security play key role in these MAC aspects fundamental their management. The classical approaches not suitable WSNs given the nodes, subsequently require lightweight cryptography mechanisms order achieve high levels. In this paper, ...

- Knee pathologies including focal cartilage injuries, osteoarthritis (OA), and ligament injuries are common. The poor regeneration and healing potential of cartilage has led to the search for other treatment modalities with improved healing capacity. Furthermore, with an increasing elderly population that desires to remain active, the burden of knee pathologies is expected to increase. Increas...

New archaeological evidences of the so-called "Bactrian-Margiana Archaeological Complex" (= BMAC) has invited a change in our knowledge of the cultural relations between Oxus civilization and south-eastern Iran during the III-II millennium B.C. transition period. The new archaeological projects in southern and western Turkmenistan, as well as attested at Gonur Depe, have showed a wider and more...

Wireless sensor networks (WSNs) are one of the fastest changing ICT related areas both in industry and research fields, having a big impact on modern society. Nevertheless, designing a WSN requires considering a set of constraints and low energy is one of the most important of them [1]. From previous approaches we saw that the energy efficiency issue is addressed at different levels, including ...

LWT-MAC is a new Low Power Listening MAC protocol for WSNs designed to rapidly react to instantaneous increases of the network load. It takes advantage of overhearing by waking up all nodes at the end of a transmission to send or receive packets without needing to transmit the long preamble before. In this work, detailed analytical models of the LWT-MAC and B-MAC protocols, for both saturated a...

: A Key Challenge in wireless sensor networks is the power efficiency as sensor nodes are small sized, low power, low cost micro electro mechanical system (MEMS) which is capable of Sensing, Computing and Communicating. In this paper on the basis of different T-MAC protocols like BMAC, SPEC-MAC-D, X-MAC the protocol MIX-MAC is analyzed on the basis of power used and network delay, so that life ...

This paper introduces Human Energy Harvesting Medium Access Control (MAC) protocol (HEHBMAC), a hybrid polling MAC suitable for Wireless Body Area Networks (WBANs) powered by human energy harvesting. The proposed protocol combines two different medium access methods, namely polling (IDpolling) and probabilistic contention (PC) access, to adapt its operation to the different energy and state (ac...