From July 2012 Nature Publishing Group launches Emerging Microbes & Infections, an online-only, open access journal publishing Original Articles, Reviews, Editorials, Case Reports, News and Views, Letters to the Editor and Research Summaries pertaining to all areas of emerging microbes and infectious diseases.
" Mobile Learning is about self-actuated personalization.
As learning practices and technology tools change, mobile learning itself will continue to evolve. For 2013, the focus is on a variety of challenges, from how learners access content to how the idea of a “curriculum” is defined."
By considering the unique sea-level "fingerprint" created by a melting ice sheet, a team of geophysicists in North America has developed a new method for pinpointing the sources of global sea-level rise. Their approach could provide a way to measure the impact of the Greenland and West Antarctic ice sheets – the greatest sources of uncertainty in projections of future sea-level changes.
Long-term variations in sea level are caused by processes including thermal expansion of the water, changes in ocean circulation, and changes in the size of glaciers and ice sheets. Measurements from tide gauges indicate a global average sea-level rise of 1–2 mm/yr during the 20th century. However, this estimate ignores geographical variations in sea level, and provides no information about the contribution of different processes.
One possible way to pick apart the total sea-level change is to look for the distinct pattern, or fingerprint, of a melting ice sheet. Close to the ice sheet, for example, the sea level tends to fall. This is a result of both the local uplift of the Earth's crust after being relieved of the great weight of the ice and a reduction in the ice sheet's gravitational pull on the ocean. Moving further away from the ice sheet, however, the sea level rises progressively.
Melt rates of 0.3 and 0.5 mm/yr were assumed for the Greenland (GIS) and West Antarctic (WAIS) ice sheets, respectively, along with their predicted fingerprints. The researchers then applied the Kalman filter to this synthetic dataset, initializing the algorithm with melt rates of zero.
The algorithm was found to estimate the melt rates most accurately when applied to the maximum number of tide gauges, providing enough information for the ice-sheet fingerprints to be separated from the globally uniform trend. The final estimated melt rates for the GIS and WAIS were 0.21 and 0.38 mm/yr, respectively, close to the values used in the synthetic dataset. The 1σ uncertainties associated with these values indicate the magnitude of ice-sheet melting that could potentially be detected in real sea-level records.
Icons and symbols are small visual elements that you can attach to topics in your mind maps, which add meaning and context to them. These miniature images can be used to depict priority, types of activities, tasks, and types of information and ideas.
This site makes it easy to create images merged with QR codes. It's great for creating stylish interactive logos or add QR links or info to photos. Just choose an image, enter the QR code details, drag into place and download the result.
"A versatile, yet easy-to-use tool for organizing ideas and data. Creates mind maps that intuitively illustrate your thought process. Outputs a wide variety of document styles and formats. Delivers presentations from mind maps with built-in modes and MS PowerPoint export. Perfect for brainstorming, project planning, meeting management, note taking, and more."