Archive for November, 2012

Satellite connectivity solutions in rural areas

The recently announced partnership between Vodacom Business Services and Agri SA – the country’s foremost agriculture trade association – for satellite connectivity solutions is already seeing an uptake in remote rural areas. Agri SA members are welcoming the ability to obtain reliable and robust connectivity for their businesses, thus growing their markets. Vodacom Satellite Connect […]

Vendor-neutral satellite earth station for Africa

Teraco Data Environments has announced the launch of Africa’s first vendor neutral satellite earth station, due to be completed in March 2013. A satellite earth station is a terrestrial station with multiple parabolic antennas or receivers that function as a hub connecting a satellite with a terrestrial telecommunications network. The station, named the Teraco Teleport, […]

Delivering GW-scale low cost clean power solutions

by Daniel Schwab, BrightSource Recently Eskom released its multi year price determination (MYPD3) document, requesting from the national energy regulator a 16% increase per annum of its average electricity selling price, each year for the next five years, beginning in May 2013. Download the PDF document

Letter to editor

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Analysis of a solar absorption system with interior energy storage

by Bilsay Pastakkaya, University of Uludag, Turkey This study examines experimentally the cooling application of a solar absorption system with interior energy storage that uses two different auxiliary systems. The experiments were performed at Uludag University, Bursa, Turkey on 3 and 4 August 2010 that had the approximately same average outdoor temperature, 31°C Download the […]

Letter to the editor

“Renewable – but at what price?” asks Chris Yelland. Indeed! the cost is high. Download the PDF document

The vision thing

Sir The three Ghosts of Christmas, Ebenezer Scrooge and I were taking the year in review at our usual seasonal gathering. For lunch we had a turkey the size of which would have done the Cratchits proud and in the congenial postprandial atmosphere we were soon engrossed in a lively review of things past, present […]

Easy connection between Profibus and Profinet

Moxa´s new gateway MGate 5102-PBM-PN connects Profibus devices with Profinet and enables an easy entry into the Profinet technology. It extends Moxa´s MGate product family consisting of the models MGate 5101-PBM-MN for connecting Profibus to Modbus TCP and MGate 4101-MB-PBS for protocol conversion between Modbus and Profibus. Thanks to MGate 5102-PBM-PN, you can continue to use […]

Automation and drive solutions for water applications

Siemens has decided to reorganise its activities in the water business. The company intends to focus in the future on automation and drive solutions for the control of water applications for municipalities and industry. The business unit known as Siemens Water Technologies, which offers solutions for municipal and industrial water purification and wastewater treatment, is […]

Low phase noise and low G-sensitivity

By using TO-packaged 3rd and 5th overtone SC-cut crystals and noise-minimised electronic circuits, KVG’s engineers have succeeded in designing new RF OCXOs that provide very low phase noise and low G-sensitivity, thereby extending the range of applications for small packaged OCXOs. For a 100 MHz output signal the phase noise at 100 Hz from the […]