2013 — One of the most southerly populations of polar bears in the world -- and the best studied -- is struggling to cope with climate-induced changes to sea ice‚ new research reveals. Based on over 10 years’ data the study‚ published in the British Ecological Society’s Journal of Animal Ecology‚ sheds new light on how sea ice conditions drive polar bears’ annual migration on and off the ice. Share This: 69 Related Ads: * Climate Change * See Polar Bears * Global Warming * Animals See Also:
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1 Multi-Channel Scheduling and Spanning Trees: Throughput-Delay Trade-off for Fast Data Collection in Sensor Networks ¨ Amitabha Ghosh‚ Ozlem Durmaz Incel‚ V. S. Anil Kumar‚ and Bhaskar Krishnamachari Two primary factors that affect the data collection rate (throughput) and timeliness (delay) are: (i) efficiency of the link scheduling protocol‚ and (ii) structure of the routing tree in terms of its node degrees and radius. In this paper‚ we utilize multiple frequency channels and design an
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given fair weather the sun is visible for the full 24 hours. The number of days per year with potential midnight sun increases the farther towards either pole one goes. Although approximately defined by the polar circles‚ in practice midnight sun can be seen as much as 90 km outside the polar circle‚ as described below‚ and the exact latitudes of the farthest reaches of midnight sun depend on topography and vary slightly year-to-year. There are no permanent human settlements south of the Antarctic
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Plot a graph <y> versus t (plot t on the abscissa‚ i.e.‚ x-axis). Results 2: Task 3. Plot a graph <y> versus t2 (plot t2 on the abscissa‚ i.e.‚ x-axis). The equation of motion for an object in free fall starting from rest is y = ½ gt2‚ where g is the acceleration due to gravity. This is the equation of a parabola‚ which has the general form y = ax2. Results 3: Task 4. Determine the slope of the line and compute an experimental value of g from the slope value. Remember‚ the slope of this graph represents
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uncertainty about the real value of the respective cost‚ which can take any value in the interval‚ independently from the costs associated with the other edges of the graph. Adopting the model described above‚ the classic optimality criterion of the minimum spanning tree problem (where a fixed cost is associated with each edge of the graph) does not apply anymore‚ and
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times throughout the year‚ they can function well in society. This is why during the maple season in the spring‚ Canadian vampires create many maple products to replenish themselves. Many foreigners believe that Canadians own polar bears as pets‚ this is true where polar bears live. Elsewhere in Canada‚ black bears and grizzly bears are kept as pets. Bears are considered dangerous animals‚ and sometimes monsters‚ due to their size and the story’s of them attacking people. Canadians have been able
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References: of Mathematics and Statistics ‚The University of Melbourne‚ 2006 [2] E. W. Dijkstra. A note on two problems in connexion with graph[J]‚ Numerische Mathematic‚ 1959 Engineering‚ Petra Christian University‚ 2005 [4] Liang Dai‚ Fast Shortest Path Algorithm for Road Network and Implementation‚ Carleton University School of Computer Science‚ 2012 [5] Xiang Liu‚ Daoxiong Gong‚ A comparative
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this pattern is expected to continue as climates everywhere changes and temperatures go up. As Earth warms up‚ the glaciers in the Arctic start to melt‚ and species such as the polar bear and the arctic fox that depend on the sea ice‚ will start to disappear and only be available for viewing in places such as zoos. The polar bear and the arctic fox are not just the only species that will be affected. The fish‚ birds‚ marine mammals‚ and even the algae that grows on the undersides of the glaciers will
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Origami : Kusudama. One important point to be made on assembling modular origami is the color arrangement‚ where the planar graph theory‚ polyhedral‚ and also a coloring-theorem potentially as notorious as the Four Color Theorem‚ come into play. A planar graph is‚ by definition‚ on which edges intersect at vertex points only. And in modular origami‚ such graphs are often “capped”—meaning they would have pyramid shapes capped on each face‚ resulting in a spiky surface. To find a way to color
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Administration within the Department of Commerce‚ is responsible for managing cetaceans‚ otariids‚ and phocids. The U.S. Fish and Wildlife Service‚ part of the Department of the Interior‚ is responsible for managing odobenids‚ sirenians‚ otters‚ and polar
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