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  • Phys.org - wind velocity
    meteors A surprise flurry of meteors or shooting stars caught the eye of several casual observers in Western Europe on the night of 9 10 September The meteors were apparently quite fast with some bright enough to qualify as Sep 19 2013 in Space Exploration 0 0 Loess landscapes could be major source of dust Dust which affects weather and climate and can be hazardous to health can be generated when sand or silt grains are either dislodged from the surface by other windblown grains saltation or lifted by wind directly direct Sep 03 2013 in Earth Sciences 0 0 Team succeeded in precisely measuring expansion velocity of shockwave of supernova remnant W44 A research team led by Tomoro Sashida and Tomoharu Oka Keio University has succeeded in precisely measuring the expansion velocity of a shockwave of the supernova remnant W44 The remnant is located in the constellation Aug 13 2013 in Astronomy 0 0 90 million laser shots bring wind satellite back on track Phys org Developing new ways of monitoring Earth is always demanding but ESA s Aeolus mission has faced some particularly difficult technical challenges However with the success of intense high energy tests on its Apr 18 2013 in Space Exploration 0 8 Lasers on planes to prevent fatal crashes Phys org A low cost laser sensor that can quickly and accurately measure the velocity of commercial passenger aircrafts could complement existing sensors and help prevent fatal aeroplane crashes say University of New Aug 03 2012 in Engineering 0 0 A new insight into horse flu The management of influenza outbreaks in horses will directly benefit from research by the Faculty of Veterinary Science at the University of Sydney Apr 24 2012 in Plants Animals 0 0 Weather patterns help predict dengue fever outbreaks High temperatures

    Original URL path: http://phys.org/tags/wind+velocity/ (2016-02-13)
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  • Phys.org - trees
    change prompts makeover of New England s forests study finds Forest soils across New England will store fewer nutrients and metals some beneficial some harmful as climate change prompts maples and other deciduous trees to replace the region s iconic evergreen conifers a Dartmouth Jan 29 2016 in Environment 8 0 A new global team tracks temperature change through time High on mountains across Alaska Canada Europe and Russia near the upper tree line even the hardiest of conifers are at the edge of survival Their annual rings tell a story of extreme cold that limited their growth and Jan 29 2016 in Earth Sciences 8 0 Nine year old boy plants seed that yields three trillion trees Talk about mighty oaks growing from little acorns A 9 year old s homework assignment has led to the world s most comprehensive tree counting project which in turn stands to increase the value of upcoming missions from NASA Jan 29 2016 in Environment 69 0 Uncertainties in tree ring based climate reconstructions probed Current approaches to reconstructing past climate by using tree ring data need to be improved on so that they can better take uncertainty into account new research led out of New Zealand s University of Otago suggests Jan 27 2016 in Earth Sciences 10 0 To find energy rich food like tropical ripe fruit is a challenge for chimpanzees In our supermarkets we buy raspberries in winter and chestnuts in summer But how challenging would life become if we needed to consume large amounts of fruit for our daily meal and had to collect them ourselves With a Jan 22 2016 in Plants Animals 12 0 New genus of tree hole breeding frogs found in India Scientists describe and name a new genus of tree hole breeding frogs from India according to a study published January 20 2016 in the open access journal PLOS ONE by S D Biju from the University of Delhi and colleagues Jan 20 2016 in Plants Animals 41 0 1 2 3 4 5 6 7 8 Next Tree A tree is a perennial woody plant It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance A minimum height specification at maturity is cited by some authors varying from 3 m to 6 m some authors set a minimum of 10 cm trunk diameter 30 cm girth Woody plants that do not meet these definitions by having multiple stems and or small size are called shrubs Compared with most other plants trees are long lived some reaching several thousand years old and growing to up to 115 m 379 ft high Trees are an important component of the natural landscape because of their prevention of erosion and the provision of a weather sheltered ecosystem in and under their foliage Trees also play an important role in producing oxygen and reducing carbon dioxide in

    Original URL path: http://phys.org/tags/trees/ (2016-02-13)
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  • Phys.org - surface area
    How thin can a camera be Very say Rice University researchers who have developed patented prototypes of their technological breakthrough Nov 23 2015 in Engineering 1591 1 Graphene and metal nitrides improve the performance and stability of energy storage devices Supercapacitors can be charged and discharged tens of thousands of times but their relatively low energy density compared to conventional batteries limits their application for energy storage Now A STAR researchers have Nov 18 2015 in Nanomaterials 49 0 A hairy situation Hair increases surface area for animals by 100 times Georgia Institute of Technology researchers combed through more than two dozen studies and did surface measurements for 27 mammals and insects to better understand how animals are able to clean themselves The findings could Nov 09 2015 in Plants Animals 48 0 New catalyst features unsurpassed selectivity Catalysts that power chemical reactions to produce the nylon used in clothing cookware machinery and electronics could get a lift with a new formulation that saves time energy and natural resources Oct 29 2015 in Materials Science 39 0 Nanotechnology offers new approach to increasing storage ability of dielectric capacitors Oct 21 2015 was the day that Doc Brown and Marty McFly landed in the future in their DeLorean with time travel made possible by a flux capacitor Oct 23 2015 in Nanomaterials 1595 0 1 2 3 4 5 6 7 8 Next Surface area Surface area is the measure of how much exposed area a solid object has expressed in square units Mathematical description of the surface area is considerably more involved then the definition of arc length of a curve For polyhedra objects with flat polygonal faces the surface area is the sum of the areas of its faces Smooth surfaces such as a sphere are assigned surface area

    Original URL path: http://phys.org/tags/surface+area/ (2016-02-13)
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  • Phys.org - wind forces
    RapidScat provided forecasters with information about Tropical Storm Guillermo revealing that the strongest winds were on the northern and eastern sides Aug 05 2015 in Earth Sciences 28 0 Tropical storm Enrique re classified as a Tropical Storm Although it appeared that Tropical Storm Enrique had weakened to a tropical depression satellite data revealed that there was still some punch left in the system and it was re classified a tropical storm on July 17 Scatterometer Jul 17 2015 in Earth Sciences 6 0 RapidScat shows Enrique holding tropical storm status The National Hurricane Center deemed that the Eastern Pacific Ocean s tropical cyclone Enrique continued to hold onto tropical storm status during the morning of July 16 based on surface wind data from NASA s RapidScat instrument Jul 16 2015 in Earth Sciences 3 0 NASA sees heavy rain in Tropical Cyclone Chan Hom The Global Precipitation Measurement or GPM mission core satellite passed over Tropical Cyclone Chan Hom and found heavy rainfall in the newborn storm Jul 01 2015 in Earth Sciences 39 0 Image Snow covered northeastern United States Yet another potent winter storm battered the northeastern United States on Feb 14 15 2015 The nor easter brought 12 to 20 inches 30 to 50 centimeters of snow across much of eastern New England along with tropical storm Feb 19 2015 in Earth Sciences 9 1 NOAA s DSCOVR Offering a new view of the solar wind There s a fascinating spot some 932 000 miles away from Earth where the gravity between the sun and Earth is perfectly balanced This spot captures the attention of orbital engineers because a satellite can orbit this spot Feb 06 2015 in Space Exploration 28 0 Newborn Tropical Storm Tapah threatens Saipan and Tinian A tropical storm warning is in

    Original URL path: http://phys.org/tags/wind+forces/ (2016-02-13)
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  • How trees withstand a storm
    we need to make progress in this area Explore further Beetle suspect in deaths of red bay trees Provided by University of Connecticut 0 shares feedback to editors Tweet Favorites Email Print PDF Featured Last comments Popular Detection of gravitational waves would open new window on universe Feb 10 2016 58 Gravitational waves detected 100 years after Einstein s prediction Feb 11 2016 144 Physicists create first photonic Maxwell s demon 15 hours ago 3 GPS tracking down to the centimeter Feb 11 2016 10 A metal that behaves like water Feb 11 2016 2 more Phys org on facebook Relevant PhysicsForums posts The great basic question of science on origin of life 1 hour ago How to create microscope videos 2 hours ago Fly feeling 11 hours ago Why do you get pressure drop in central circulation 12 hours ago Novel Idea on the Origin of Life 13 hours ago Opening the blood brain barrier with collapsing bubbles 21 hours ago More from Biology and Medical Related Stories Beetle suspect in deaths of red bay trees February 27 2006 Red bay trees across the southern United States are being threatened by a fungus introduced into the trees stems by Asian Ambrosia beetles Shade trees fight global warming in Calif September 4 2006 Sacramento Calif has decided that when it comes to battling global warming Mother Nature knows best and nothing is better than planting a tree Judge rules for Floridians who lost trees December 11 2007 A Palm Beach Fla circuit court judge has ruled in favor of homeowners who lost citrus trees when the state tried to halt the spread of canker disease Computer mimics nature by watching TV w Video January 28 2010 PhysOrg com Computer scientists at the University of Bath have developed a new way of making life like animations of trees using video footage of the real thing The Dynamics of Forest Canopy Motion January 29 2010 PhysOrg com While it s well known that wind causes trees to sway it s less widely recognized that the movement of the trees in turn affects the wind Mark Rudnicki an assistant professor in the Department of Natural Book examines how trees change as they age and grow What do these clues tell us July 19 2011 Knowing how trees grow and how they age may be key to further understanding how trees react to a warmer climate for instance and other changes Little is known however about the cause of the physical changes associated Recommended for you Jaws may help humans grow new teeth shark study suggests February 12 2016 A new insight into how sharks regenerate their teeth which may pave the way for the development of therapies to help humans with tooth loss has been discovered by scientists at the University of Sheffield Urbanization leads to change in type of bacteria in the home February 12 2016 Whether it s a jungle hut or a high rise apartment your home is covered in

    Original URL path: http://phys.org/news/2011-09-trees-storm.html (2016-02-13)
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  • Phys.org - Physical Review E
    to imagine that you have 128 tennis balls and can arrange them in any way you like The Jan 27 2016 in General Physics 1177 9 A seemingly obvious way to make the electricity market better may actually make it worse Restaurants often have their best specials in the middle of the week as a way to increase business on their slowest days By evening out the flow of customers carefully timed sale prices can reduce fluctuations in demand Jul 23 2015 in General Physics report 1120 49 The origin of the very first species and the start of Darwinian evolution During the earliest evolution on earth life probably resembled one big genetic jumble At some time presumably around 3 8 to 3 5 billion years before today the very first biological species appeared the ancestor of Nov 23 2015 in General Physics 324 32 Locusts interact with several neighbours to swarm together Swarming locusts interact with at least two of their neighbours when aligning themselves in order to march in the same direction says new research led by our mathematicians Nov 06 2015 in Plants Animals 581 0 Researchers further explain unique high altitude snow formations Phys org A team of researchers with the Institute of Industrial Physics and Chemistry in France has modified an explanation for the formation and spacing of high altitude snow formations known as penitents In their Oct 01 2015 in General Physics report 35 0 New model sheds light on flocking behaviour Understanding how turbulence can alter the shape and course of a flock of birds a swarm of insects or even an algal bloom could help us to better predict their impact on the environment May 26 2015 in General Physics 37 0 Researcher finds sports events are surprisingly predictable November 1 marked

    Original URL path: http://phys.org/journals/physical-review-e/ (2016-02-13)
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  • Trees found to break at near the same wind speed regardless of size or species
    and how they came up with a scaling law to describe the point at which a tree will break due to wind stress People have noticed for some time that when high winds strike trees regardless of size age or species all seem to snap in a given area but only when the wind reaches some given speed Up until now it has not been clear if all trees snap at the same wind speed or if there is a gradient of sorts To find out the researchers in France conducted experiments where they attached water buckets to wooden rods to measure both their flexibility and the point at which they would break In so doing the team found that the rods tended to break at near the same point Next the team combined their lab experiments with data collected by others over time that suggested that trees tend to snap when wind speeds reach approximately 42 meters per second Using all the information at hand the team came up with a scaling law to describe when a tree will break due to wind force V D 0 75 L where V is wind velocity D is diameter of the wood and L is its length When applied to trees rather than just rods the team found that variance due to physical differences between species was minimal doubling the size of the tree for example made a difference of just 9 percent and oak trees notorious for their strength broke at speeds just 10 percent higher than pine The researchers explain that the size of a tree does not play a bigger role because they grow at a rate where their height is proportional to diameter and because the larger a tree grows the more defects in the wood come

    Original URL path: http://phys.org/print374310774.html (2016-02-13)
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  • Researchers measure cavitation noise in trees
    the acoustic signals emitted by trees and to obtain further information in the evolution of wood under dry stress conditions 1 shares feedback to editors 2013 Phys org Tweet Favorites Email Print PDF Featured Last comments Popular Detection of gravitational waves would open new window on universe Feb 10 2016 58 Gravitational waves detected 100 years after Einstein s prediction Feb 11 2016 144 Physicists create first photonic Maxwell s demon 15 hours ago 3 GPS tracking down to the centimeter Feb 11 2016 10 A metal that behaves like water Feb 11 2016 2 more Phys org on facebook Relevant PhysicsForums posts The great basic question of science on origin of life 1 hour ago How to create microscope videos 2 hours ago Fly feeling 11 hours ago Why do you get pressure drop in central circulation 12 hours ago Novel Idea on the Origin of Life 13 hours ago Opening the blood brain barrier with collapsing bubbles 21 hours ago More from Biology and Medical Related Stories Why juniper trees can live on less water February 27 2008 An ability to avoid the plant equivalent of vapor lock and a favorable evolutionary history may explain the unusual drought resistance of junipers some varieties of which are now spreading rapidly in water starved regions Book examines how trees change as they age and grow What do these clues tell us July 19 2011 Knowing how trees grow and how they age may be key to further understanding how trees react to a warmer climate for instance and other changes Little is known however about the cause of the physical changes associated Seeing the wood for the trees New study shows sheep in tree ring records July 27 2011 Nibbling by herbivores can have a greater impact on the width of tree rings than climate new research has found The study published this week in the British Ecological Society s journal Functional Ecology could help increase The case of the dying aspens December 12 2011 Over the past 10 years the death of forest trees due to drought and increased temperatures has been documented on all continents except Antarctica This can in turn drive global warming by reducing the amount of carbon dioxide Semi dwarf trees may enable a green revolution for some forest crops September 27 2012 Phys org The same green revolution concepts that have revolutionized crop agriculture and helped to feed billions of people around the world may now offer similar potential in forestry scientists say with benefits Researchers find trees worldwide more sensitive to drought than previously thought November 22 2012 Phys org A multinational team of researchers has found that trees worldwide are more sensitive to drought than scientists realized By analyzing data on trees around the world the teams has as they write in their paper Recommended for you Jaws may help humans grow new teeth shark study suggests February 12 2016 A new insight into how sharks regenerate their teeth which may pave

    Original URL path: http://phys.org/news/2013-04-cavitation-noise-trees.html (2016-02-13)
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