Is 'traditional medicine' mumbo-jumbo, as I was given to understand as a doctor's son in then British-run Uganda? Any link the witch-doctors had with modern times was the constant pinching of syringes from Mulago Hospital. They plunged them into their customers with unsterilised needles, I remember overhearing. Victims often ended up being treated in Mulago, occassionally with cattle urine in t...

A Distributed Routing and Channel Selection Scheme for Multi-Channel Wireless Sensor Networks Amitangshu Pal 1, Sarbani Roy 2 and Asis Nasipuri 3 1 Temple University, Philadelphia, PA; [email protected] 2 Jadavpur University, Kolkata, West Bengal; [email protected] 3 The University of North Carolina at Charlotte, Charlotte, NC; [email protected] * Correspondence: amitangshu.pal...

One of the main challenges that prevents the large-scale deployment of Wireless Sensor Networks (WSNs) is providing the applications with the required quality of service (QoS) given the sensor nodes’ limited energy supplies. WSNs are an important tool in supporting applications ranging from environmental and industrial monitoring, to battlefield surveillance and traffic control, among others. M...

Cellular, laptop, tablet and handheld devices support WLAN technology. In addition to the spectral efficiency and security issues, power consumption is a vital issue in making the usage of these devices widespread. Efforts are underway in improving power conservation in those devices and thus increasing the duration between recharging the battery. Power consumption is mainly due to the transmis...

The Public Wireless Local Area Network (PWLAN) is an emerging service for wireless access to the Internet. However, the service coverage of the PWLAN is limited by the deployment of access points (APs) because only those who stay near the AP can access the PWLAN. A feasible way of extending the service coverage of a PWLAN is to deploy mobile ad hoc access networks (MAHANs) so that users who are...

The importance of overhearing, and other ways of monitoring communicative behaviour not explicitly directed at oneself, has been illustrated in numerous ethnographic studies of computer-supported cooperative work. This paper is concerned with a particular form of monitoring. A &&peripheral participant'' is de"ned as someone who has a legitimate interest in monitoring a joint task (being carried...

A characteristic feature that is frequently met in nearby supernova remnants (SNRs) the existence of two antisymmetric, local protrusions are projected as "ears" morphology nebula. In this work, we present a novel scenario for "ear" formation process according to which lobes formed through interaction SNR with bipolar circumstellar medium (CSM) was surrounding explosion center. We conduct dimen...

Wireless sensor networks (WSNs) comprise a number of autonomous sensors and one or more sinks to cooperatively monitor physical or environmental conditions. Energy efficiency is a key design factor of a MAC protocol for WSNs. Due to the importance of the problem, a number of energy efficient MAC protocols have been developed for WSNs. Preamble-sampling based MAC protocols (e.g., B-MAC and X-MAC...

This paper proposes an enhanced B-MAC (ENBMAC), a carrier sense Medium Access Control (MAC) protocol with ultra low power operations for wireless sensor networks. Due to battery-operated computing and sensing devices in wireless sensor networks, the development of MAC protocols that efficiently reduce power consumption is an important issue. B-MAC provides bidirectional interfaces such as Clear...