The Greek School Network (GSN) is a closed educational network that offers advanced telematic and networking services to all units of primary and secondary education schools and administration offices in Greece. The main objective of GSN is the implementation of a network infrastructure for the interconnection of the school laboratories and the provision of a wide range of network and telematic...

Ethernet, wireless LAN, ADSL, cable modem and dialup are common access networks, but have dramatically different characteristics. Fast and accurate classification of access network type can improve protocol or application performance significantly. In this paper, we propose a simple and efficient end-end scheme to classify the type of an access network using packet pairs. Our scheme is based on...

The development and assessment of spectrum management methods for the copper access network are usually conducted under the assumption of accurate channel information. Acquiring such information implies, in practice, estimation of the crosstalk coupling functions between the twisted-pair lines in the access network. This type of estimation is not supported or required by current digital subscri...

This paper investigates the performance of media access protocols based on on-line scheduling for an optically connected star-coupled system with Wavelength Division Multiple Access channels. Hybrid access protocols combining reservation and pre-allocation of receiver channels have been recently proposed. Transmission consisted of a reservation phase followed by a data phase. Each node was allo...

This study analysed factors influencing food security status of female headed farm households in Abia state, Nigeria. Multistage random sampling technique was employed in selecting 240 female headed farm households from whom data were collected using structured questionnaire. Data collected were analyzed using descriptive statistics, food security indices and probit regression technique. Result...

The Present day workstations, low-power processors, computers and super computers are using fast Static Random Access Memory (SRAMs) and will require, in the future, larger density memories with faster access time and minimum power consumption. Acknowledging the intense requirements for power, in current high performance memories of computing devices, the circuit designers have developed a numb...

OBJECTIVE In MS, Socio-Economic status (SES) may influence healthcare and access to disease-modifying treatments (DMTs). Optimising delays to switch patients to a second-line DMT may hamper disease progression most effectively and achieve long term disease control. The objective of this study is to identify the influence of SES on the delay between first and second line DMT in RRMS patients, in...

The development of Wi-Fi network is not only about the installment of access point infrastructure, but also related to various factors such as signal strength of the access point, design and infrastructure of the room, distribution of groups of access point users, radio wave interferences, and signal obstacles. Therefore in a Wi-Fi network, the placement of access point has a significant impact...

BACKGROUND Assessment of physical access to health services is extremely important for planning. Complex methods that incorporate data inputs from road networks and transport systems are used to assess physical access to healthcare in industrialised countries. However, such data inputs hardly exist in many developing countries. Straight-line distances between the service provider and resident p...