The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Background Young people in the UK are at highest risk of sexually transmitted infections and report higher levels of unsafe sex than any other age group. Involving peer supporters in intervention delivery is acceptable to students and effective in reducing risk behaviours via ‘diffusion of innovation’, particularly where peer supporters are influential in their networks. Informal peer-led interventions...
The Australian Square Kilometre Pathfinder ASKAP Design Enhancement (ADE) is the second generation architecture based on a distributed antenna system (DAS) with radio over fiber transmission (RFoF) from planar phased array feed (PAF) to the central site digital signal processing (DSP). With 36 × 12m reflector antennas and 188 elements per PAF, there are 6840 ports with signal and conversion (SAC)...
We present the integration, laboratory verification, and field testing of the first full-size Mk II Phased-Array Feed (PAF) built for the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope. The ASKAP PAFs are a 94 port × 2 polarisation version of a planar connected “chequerboard” array (Hay and O'Sullivan, Radio Science, 43, no. 6, 2008). They operate over 0.7 GHz to 1.8 GHz and...
The preservation of a radio quiet site for both ASKAP and SKA telescopes relies on maintaining EMC compliance of all equipment. A potential source of radio frequency interference (RFI) is from leakage of RF signals from equipment housed within the antenna structure (most notably the pedestal electronics and power systems) through the foundations.
The Australian SKA Pathfinder (ASKAP) [1] is a new survey telescope, using phased-array feeds (PAFs) to provide a wide field of view, with 300MHz instantaneous bandwidth over the frequency range 0.7–1.8 GHz. ASKAP is currently under construction in outback Western Australia at the Murchison Radio-astronomy Observatory (MRO). ASKAP will consist of an array of thirty-six 12-metre diameter dishes, each...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.