Monday 27 October 2014

Watch The Antares Rocket Launch LIVE

Weather permitting, tens of millions of people in the northeast United States will be able to view the launch of the Orbital Sciences’ Antares rocket tonight for the ISS Commercial Resupply Services Mission (Orb-3). The rocket is currently set to launch at 6:45 pm EDT from NASA’s Wallops Flight Facility in Virginia. This will be the third Cygnus resupply mission to the ISS and the first night launch.









In the minutes that follow liftoff, the rocket will be visible to those living up in Massachusetts all the way down to those in North Carolina. Orbital Sciences has developed this map that will indicate when the rocket will be five degrees above the horizon for various locations. Of course, this map might not be perfectly accurate due to weather conditions, and the view could be blocked entirely by mountains, trees, skyscrapers, or other obstructions.


Freedawn Scientia - Watch The Antares Rocket Launch Tonight Live


The vessel is loaded with 2,290 kilograms (5,050 pounds) of cargo destined for the International Space Station, which is the heaviest payload delivered by a Cygnus vessel yet. Contents of the cargo include food and care packages for the crew, parts, experiments, and the Arkyd-3 satellite from Planetary Resources. This will test the gear to be used on the upcoming Arkyd Space Telescope, which had a monstrously successful Kickstarter campaign in the summer of 2013.



Watch the Launch Live from the NASA site











Watch The Antares Rocket Launch LIVE

Light-matter interaction can turn opaque materials transparent

All objects’ colors are determined by the way that light scatters off of them. By manipulating the light scattering, scientists can control the wavelengths at which light is transmitted and reflected by objects, changing their appearance.









In a new study published in Physical Review Letters, researchers have developed a new method for manipulating light scattering. They theoretically show how to induce transparency in otherwise opaque materials using the complex dipole-dipole interactions present in a large number of interacting quantum emitters, such as atoms or molecules. This ability could have several potential applications, such as producing slow light or stopped light, along with applications in the field of attosecond physics.


“The significance of our work is in the discovery of a very neat phenomenon (dipole-induced electromagnetic transparency [DIET]), which may be used to control light propagation in optically active media,” coauthor Eric Charron, Professor at the University of Paris-Sud in Orsay, France, told Phys.org. “We showed how light scattering by a nanometric size system, collectively responding through strongly coupled two-level atoms/molecules, can be manipulated by altering the material parameters: an otherwise opaque medium can be rendered transparent at any given frequency, by adequately adjusting the relative densities of the atoms/molecules composing it.”


As the scientists explain, light scattering is very well understood when dealing with individual quantum emitters; that is, single atoms or molecules. But the physics becomes much more complex when dealing with two or more interacting emitters. In this case, the electromagnetic field experienced by an emitter depends not only on the light beam striking its surface, but also on all of the electromagnetic fields radiated by all of its neighbors, which in turn are affected by the emitter in question.


Each quantum emitter can have a dipole, meaning a positive side and a negative side, due to an uneven distribution of electrons within the emitter. In a dense “vapor” of many quantum emitters, strong dipole-dipole couplings can then occur. The collective effects usually result in an enhancement of the light-matter interaction, although a very complicated one.


Here, the researchers have theoretically shown that strong dipole-dipole interactions in a dense vapor of quantum emitters can be used to manipulate the spectral properties of the light scattered by the emitters. In particular, the medium may become transparent at a particular frequency that can be controlled to a certain extent.


The scientists explain that, on the most basic level, DIET results from destructive interference between the electromagnetic waves emitted by the quantum emitters. DIET is also closely related to another phenomenon, called electromagnetically-induced transparency (EIT). EIT is also based on destructive interference, but it is induced by a laser instead of dipole-dipole interactions.


The scientists expect that DIET could have many of the same applications as EIT, which include the generation of slow light or stopped light by interactions with the medium. Slow light has a variety of optical applications, including information transmission, switches, and high-resolution spectrometers. Also, in the field of attosecond physics, DIET could potentially be used to generate high harmonics in dense atomic or molecular gases.


The researchers anticipate that DIET can be experimentally implemented in a few different ways, including in atomic vapor confined in a cell as well as in ultracold dense atomic clouds. However, both systems still face challenges for demonstrating DIET, which must be addressed in the future.


“Currently our goal is to hunt for the observation of DIET in multilevel atomic or molecular systems,” Charron said. “Each emitter will behave as a series of oscillating dipoles, and this is expected to yield a series of transparency windows, thus opening the way for more elaborate and flexible manipulation strategies. We will publish new results on this topic in Arxiv in the next few weeks. Moreover, DIET offers yet another way to slow the light due to strong anomalous dispersion. We thus plan to develop the study of slow light with DIET in the near future, with potential applications for information processing.”









– Credit and Resources –


Raiju Puthumpally-Joseph, et al. “Dipole-Induced Electromagnetic Transparency.” Physical Review Letters. DOI: 10.1103/PhysRevLett.113.163603. Also at arXiv:1407.1970 [quant-ph]



Light-matter interaction can turn opaque materials transparent

How Do Cells Know which way to Move?

Movement is crucial to development, wound healing and immune response in animals, not to mention cancer metastasis. In two new studies from Johns Hopkins, researchers answer long-standing questions about how complex cells sense the chemical trails that show them where to go—and the role of cells’ internal “skeleton” in responding to those cues.









In following these chemical trails, cells steer based on minute differences in concentrations of chemicals between one end of the cell and the other. “Cells can detect differences in concentration as low as 2 percent,” says Peter Devreotes, Ph.D., director of the Department of Cell Biology at the Johns Hopkins University School of Medicine. “They’re also versatile, detecting small differences whether the background concentration is very high, very low or somewhere in between.”


Working with Pablo Iglesias, Ph.D., a professor of electrical and computer engineering at Johns Hopkins, Devreotes’ research group members Chuan-Hsiang Huang, Ph.D., a research associate, and postdoctoral fellow Ming Tang, Ph.D., devised a system for watching the response of a cellular control center that directs movement. They then subjected amoebas and human white blood cells to various gradients and analyzed what happened. “Detecting gradients turns out to be a two-step process,” says Huang. “First, the cell tunes out the background noise, and the side of the cell that is getting less of the chemical signal just stops responding to it. Then, the control center inside the cell ramps up its response to the message it’s getting from the other side of the cell and starts the cell moving toward that signal.” The results appear on the Nature Communications website on Oct. 27.


But to get going, the cell has to have first arranged its innards so that it’s not just a uniform blob but has a distinct front and back, according to another study from Devreotes’ group. In that work, visiting scientist Mingjie Wang, Ph.D., and postdoctoral fellow Yulia Artemenko, Ph.D., tested the role of so-called polarity—differences in sensitivity to chemicals between the front and back of a cell—in responding to a gradient. “In previous studies, researchers added a drug that totally dismantled the cells’ skeleton and therefore eliminated movement. They found that these cells had also lost polarity,” Artemenko says. “We wanted to know whether polarity depended on movement and how polarity itself—independent of the ability to move—helped to detect gradients.”


The team used a pharmaceutical cocktail that, rather than dismantling the cells’ skeleton, froze it in place. Then, as in Huang’s experiments, they watched the response of the cellular control center to chemical gradients. “Even though the cells couldn’t remodel their skeleton in order to move, they did pick up signals from the gradients, and the response to the gradient was influenced by the frozen skeleton,” Artemenko says. “This doesn’t happen if the skeleton is completely gone, so now we know that the skeleton itself, not its ability to remodel, influences the detection of gradients.” The results appear in the Nov. 6 issue of Cell Reports.


By fleshing out the details of how cells move, the results may ultimately shed light on the many crucial processes that depend on such movement, including development, immune response, wound healing and organ regeneration, and may provide ways to battle cancer metastasis.










How Do Cells Know which way to Move?

Friday 24 October 2014

In the Life of a Pygmy Marmoset

So since I was a kid, I have always wanted a monkey. This is probably something that most children want and now as an adult I can clearly see the difficulties that would come with owning a monkey. Although this never stopped me from looking at the different kind of monkeys and looking at which one I was going to have as a child. The one monkey that I always kept finding myself wanting as a kid and the one I was going to have as an adult was the Pygmy Marmoset. These little monkeys have to be by far my favorite, with their tiny hands and little furry faces. :) Anyway, this is why I have decided to do a post for the over looked Pygmy Marmosets









TAXONOMY


Suborder: Haplorrhini

Infraorder: Simiiformes

Family: Cebidae

Subfamily: Callitrichinae

Genus: Callithrix

Subgenus: Cebuella

Species: C. pygmaea

Subspecies: C. p. niveiventris, C. p. pygmaea


Other names: Cebuella pygmaea; dwergzijdeaapje (Dutch); ouistiti mignon (French); chambira, chichico, leoncillo, micoleãozinho, or titi (Spanish); dvärgmarmosett or dvärgsilkesapa (Swedish)


Life span: 12 years

Regions: Brazil, Ecuador, Bolivia, Colombia, and Peru

Gestation: 4.5 months (142 days)

Height: 136 mm (M & F)

Weight: 119 g (M & F)


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MORPHOLOGY


Pygmy marmosets are the smallest monkeys in the world, weighing a mere 119 g (4.20 oz) on average and measuring, on average, 136 mm (5.35 in) (Soini 1988; Rowe 1996). Males and females are very similar in size, though females are slightly heavier (Soini 1988). There are few distinguishing morphological differences between the subspecies, which may only differ slightly in ventral pelage color (Groves 2001). They have brownish-gold fur with black ticking on their shoulders, backs, and heads, while their ventral fur is light yellow to white. Infants are born with different pelage than is seen in adults; they are a lemon-yellow color with black ticking over their bodies while the head is a dark grey with yellow fur on and around their ears. By the end of the first month, they lose this coat and resemble adults (Soini 1988). Adult pygmy marmosets have tails that are longer than their bodies and marked with conspicuous black rings. The fur on their faces sweeps back over their forehead and ears and they have two white marks on either side of their mouth and a white, vertical line on their noses (Soini 1988). These facial markings probably serve to enhance perception of facial expression and head movements in visual communication in the diffuse light of dense forests (Soini 1988).


Though they exhibit squirrel-like patterns of locomotion, including quadrupedally running up and down tree trunks, vertically clinging to tree trunks as they feed on sap, and branch and vine-running on both the top and underside surfaces of horizontal substrates, they are not more closely related to squirrels than other primates (Kinzey 1997). Their small body size allows them to use very slender supports but does not inhibit their locomotion; pygmy marmosets can leap up to five meters (Rowe 1996; Kinzey 1997). They are also able to turn their heads 180 degrees, an adaptation which allows them to scan the environment for predators while vertically clinging to a tree (Kinzey 1997). Pygmy marmosets are able to support their weight on the tips of their long, sharp, claw-like nails (called tegulae) which are different from the flat nails (called ungulae) seen in other primates, including humans, and are probably an adaptation to a life spent clinging to trees (Kinzey 1997; Sussman 2000). An additional characteristic that aids in their exudate-eating behavior is the shape of their lower incisors. They are narrow and elongated such that the five teeth in the front and center of the lower jaw are all the same length. This helps them gnaw into trees efficiently and stimulate sap flow (Sussman 2000). They also have an enlarged cecum, a part of the digestive tract which allows extended time for the breakdown of plant gums (Sussman 2000). Another unusual characteristic seen in pygmy marmosets and other callitrichines is the pattern of giving birth to non-identical twins more frequently than singletons (Soini 1988).


Range


Found in Peru, Ecuador, Colombia, Bolivia, and Brazil, pygmy marmosets range over a large area and the subspecies are isolated by geographic barriers which include several large rivers. The northern subspecies, C. p. pygmaea, is found in the state of Amazonas, Brazil, southern Colombia, northern Bolivia, northeastern Ecuador, and eastern Peru (van Roosmalen 1997; Yépez et al. 2005). Its range is bound by the Rio Solimões and Rio Caquetá. C. p. niveiventris is found in eastern Peru and Amazonas, Brazil south of the Rio Solimões and north of the Rio Purus. It extends as far east as the Rio Madeira and is bound in the west by the Andes (van Roosmalen 1997; Groves 2001).


Given their tiny body size and the type of forests in which they are found, wild pygmy marmosets have been poorly studied and there is a lack of detailed behavioral and ecological data (Soini 1982; Heymann &Soini 1999). Many short-term field studies were carried out in the late 1960s and early 1970s, but the first long-term field study of pygmy marmosets occurred in the mid-1970s to 1980s by Pekka Soini. His findings dramatically increased knowledge about pygmy marmoset social behavior and ecology (Kinzey 1997). Additionally, pygmy marmosets have been studied in captivity at the Anthropological Institutes of Zurich University in Switzerland and at the Wisconsin National Primate Research Center, adding to the knowledge of reproductive parameters, development, behavior patterns, and communication (Soini 1988).


Habitat


Pygmy marmosets occupy mature evergreen forests in and at the edges of periodically inundated river floodplains. They are habitat specialists that prefer areas with no more than two or three meters of standing water for more than three months out of the year and are found in highest densities in river-edge forests (Soini 1988). If they are found in highland areas, it is usually along small, seasonal forest streams that are subjected to frequent, minor flooding (Soini 1988). They utilize vertical strata of the forest from ground level up to 20 m (65.6 ft) and rarely venture into the highest level of the canopy. The understory is composed of reeds, tall grasses, and a few herbaceous plants, vines, shrubs, and saplings. There are also dense thickets formed by bamboo reeds, shrubs, and vines. The tallest trees in this area often have crown heights between 30 and 40 m (98.4 and 131 ft) which support hanging vines and epiphytes (Soini 1982).


Freedawn Scientia - Pygmy Marmonset, information, facts cute little monkey pictures, smallest monkey, Facts, Information, Cute, Pictures


Data on rainfall and temperature have been reported for a study site in Peru in the Rio Maniti basin where the rainy season lasts from October to May and the dry season lasts from June to September (Soini 1982; Soini 1986). The highest amount of rain falls in March, with levels reaching more than 340 mm (1.12 ft). During the driest part of the year, only about 150 mm (5.9 in) of rain falls per month. Temperatures remain fairly constant throughout the year, hovering around 27° C (80° F) and 80% humidity (Soini 1982). In Ecuador at the Cuyabeno Faunal Production Reserve, average monthly rainfall from March to August exceeds 250 mm (9.84 in) with considerably drier periods during September through February. Average temperatures fluctuate between 22 and 29° C (71 to 84° F) with the rainy season seeing warmer temperatures (de la Torre &Snowdon 2002). Rivers begin to rise in the beginning of the dry season such that between February and June, the floodplain becomes inundated. During this time, there is an abundance of fruits, but as the floodplain dries out during the dry season, fruits also become noticeably scarce (Soini 1986).









Ecology


Characteristics such as elongated, sharp incisors and claw-like nails are adaptations to the very specific diet of the pygmy marmoset — gums and other exudates. They are exudativore -insectivores and spend the majority of their time gouging holes into trees or vines with their sharp lower teeth and then eating the gum, sap, resin, or latex that is exuded (Soini 1988). Holes are generally ten to 20 mm (.787 in) wide, four to 18 mm (.157 to .709 in) deep, and nearly perfectly circular. The “oldest” holes on a tree are closer to the ground and they get “newer” farther up the tree, indicating a pattern of usage (Ramirez et al. 1977). Insects make up the other important part of the diet, and grasshoppers are especially coveted. Pygmy marmosets forage in the crown foliage of trees at about five to 15 m off the ground, looking in vine-tangles and shrubby vegetation for spiders, orthopterans, butterflies, moths, beetles, and ants (Soini 1988). While 60 to 80% of their total feeding time is spent on exudates, they spend between 12 and 16% on insects, and supplement their diet with fruits, buds, flowers, nectars, and very occasionally small lizards (Soini 1988; Yépez et al. 2005).


Pygmy marmosets use sleeping sites, or roosts, each night and their day starts shortly after sunrise when all members of the group leave the sleeping site. Sleeping sites are generally made of dense tangles of vines or, on rare occasion, tree holes. Each group has two or three sleeping sites but only use one on a regular basis (Soini 1988; Sussman 2000). In heavy rain or dark, overcast mornings, pygmy marmosets take up to an hour longer to leave the sleeping site. Once it has left the roost, the group travels directly to their primary exudate tree where the marmosets feed for 30 to 90 minutes on gum that has been exuded during the night (Soini 1988). After this feeding bout, there is a shift in activity to more social activities such as huddling, grooming, and playing. After this brief period of rest from foraging, the group begins to focus on insect foraging and exudate foraging until midday when rest and social behavior become the predominant activities. Intense feeding activities begin again in late afternoon until the group travels back to the roost for the night (Ramirez et al. 1977; Soini 1988). The two peaks of exudate feeding occur between 6:00 and 9:00 a.m. and again between 3:00 and 6:00 p.m. (Yépez et al. 2005). Activities are not always coordinated between all group members; some may be foraging for insects while others are feeding on exudates nearby (Soini 1988).


A pygmy marmoset group, ranging in size from two to nine individuals, utilizes a primary exudate tree in its home range until the exudate yield declines at which point they gradually move to a new area, if one is available, in the vicinity of the old home range (Ramirez et al. 1977; Soini 1988). Groups of pygmy marmosets exchange home ranges as one group leaves an area and allows an exudate tree to recover, approximately every few months. When an area remains unoccupied long enough for a tree to begin producing gum in large amounts again, it is a potential new home range for a different group (Soini 1988). Densities of pygmy marmosets are quite high in riverine forests and are up to 233 individuals per km² (90.0 per mi²). Removed from a river’s edge, pygmy marmosets are found in densities closer 50 or 60 individuals per km² (19.3 or 23.2 per mi²) (Soini 1988). With such high densities, home ranges for each group are very small, averaging .003 km² (.001 mi²) but less than .005 km² (.002 mi²), and the horizontal day range within these home ranges about 300 m (.186 mi), but they may travel much farther when considering vertical movement within their home range (Soini 1988). Home ranges of neighboring groups do not overlap and there are few, if any, interactions between groups (Soini 1982).


Other primates that are found in the habitats occupied by pygmy marmosets include Saguinus fuscicollis (saddleback tamarin), Saguinus mystax (mustached tamarin), Saguinus nigricollis (black-mantle tamarin), Saguinus tripartitus (golden-mantle saddle-back tamarin), Callicebus torquatus (collared titi monkey), Callicebus moloch (dusky titi monkey), Saimiri sciureus (squirrel monkey), and Aotus (owl monkey species) (Soini 1988; Yépez et al. 2005). Saddleback and mustached tamarins sometimes feed from holes gouged by pygmy marmosets and have been seen aggressively chasing the smaller primates from the tree in order to feed. Interactions with other sympatric primates are uneventful (Soini 1988). Exudate holes are also subject to predation by ants, which move in at night when the pygmy marmosets are not feeding and carry away solidified exudate. Excessive predation by ants forces marmosets to abandon a feeding site (Soini 1988).


Because of their extremely small body size, pygmy marmosets are subject to predation by raptors, small felids, and climbing snakes. In some cases, they exhibit mobbing behavior in which the entire group flocks to an intruder, loudly vocalizing and attacking the intruder until it retreats; other times, they remain frozen until the threat has passed (Soini 1988; Kinzey 1997).


Freedawn Scientia - Pygmy Marmonset, information, facts cute little monkey pictures, smallest monkey


These are the smallest monkeys in the world although there are some primates that are bit smaller (pygmy mouse lemurs and pygmy tarsiers). The body weight of adults in the wild averages only 4 ounces! You can see from the picture above why they are often called “finger monkeys.” They are about 5 inches (13cm) tall, not including the tail. Which means they might be hard to observe in the wild as they tiny enough to be high-up in the trees on small branches. Up there, they have to be on the lookout for birds of prey. They are able to jump more than 16 ft or 5 m! Quite a distance for such a small monkey.


Quick Facts about the Pygmy Marmoset


> The Pygmy Marmoset is the world’s smallest monkey.


> A fully grown adult can easily fit into the hand of a human.


> A fully grown adult weighs less than a stick of butter.


> Its tail is longer than its whole body.


> The Pygmy Marmoset can rotate their heads 180 degrees.


> They travel in groups of up to 9 members, called a troop.


> The parents stay together for life, never leaving each other side if possible.


> They almost always give birth to twin babies.


> The father helps deliver the babies and carries them on his back for the first two weeks.


> They can leap 15 feet into the air


> They have a 12 year lifespan.


> They are banned from the United States.


Videos and Documentaries about the Pygmy Marmosets


and some other monkeys :)


UK wind power share shows record rise Due to hurricane

The United Kingdom wind power production has been enjoying an upward trajectory, and on Tuesday wind power achieved a significant energy production milestone, reported Brooks Hays for UPI. High winds from Hurricane Gonzalo were the force behind wind turbines outproducing nuclear power plants on Tuesday—supplying 14.2 percent of all electricity, compared with nuclear’s 13.2 percent. For a 24-hour period, said the BBC, “spinning blades produced more energy than splitting atoms.” Gonzalo brought gusts of up to 70 mph to the northern parts of the UK, according to National Grid.









Earlier this week, James Murray for BusinessGreen said that “figures from National Grid also show that wind power outperformed nuclear power throughout the whole weekend and into Monday morning, and allowed a number of coal power plants to be taken offline.” “Wind power set a new peak record of generating 7,998 megawatts (MW) over a half-hour period at midday on Saturday once local turbines are factored in,” said a press release from trade association RenewableUK.


Nonetheless, the wind power victory needs to be put in perspective considering other factors that were at play. Windy conditions raised turbine output at a time when a number of the UK’s nuclear reactors were offline for repairs, said reports. This can be regarded as “an unlikely turning of the tables with more electricity in the country generated by wind turbines than nuclear power for a day,” as the nuclear power portal, NuclearStreet put it. Similarly, the BBC remarked that “wind power’s ascendancy over nuclear is expected to be temporary.” NuclearStreet identified the reactors that were down: Sizewell B, down due to a “statutory outage,” Hunterston B Reactor 4 shut down for maintenance, two units at Dungeness B off, one for refueling and the other to repair a boiler pump. Back in August, four reactors were taken offline after a crack was found on a boiler spine, said the BBC.


“Wind power is often used as a convenient whipping boy by political opponents and vested interests; all the while, it’s been quietly powering millions of homes across the UK and providing a robust response to its vocal detractors,” said RenewableUK’s Director of External Affairs, Jennifer Webber.


The government, meanwhile, continues to speak about a “diverse energy mix” as the way to go to satisfy UK’s needs and for UK’s energy security. The BBC quoted a government spokesperson who said that “we need a diverse energy mix that includes renewable sources like wind and solar alongside nuclear and technologies like carbon capture and storage so we can continue to use fossil fuels in a cleaner way.”


Check out the UK’s National Grid Status here


So How do Wind Turbines actually work?


Freedawn Scientia - How does a Wind turbine work


So how do wind turbines make electricity? Simply stated, a wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity. View the wind turbine animation to see how a wind turbine works or take a look inside.


Wind is a form of solar energy and is a result of the uneven heating of the atmosphere by the sun, the irregularities of the earth’s surface, and the rotation of the earth. Wind flow patterns and speeds vary greatly across the United States and are modified by bodies of water, vegetation, and differences in terrain. Humans use this wind flow, or motion energy, for many purposes: sailing, flying a kite, and even generating electricity.


The terms wind energy or wind power describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity.









Types of Wind Turbines

Modern wind turbines fall into two basic groups: the horizontal-axis variety, as shown in the photo to the far right, and the vertical-axis design, like the eggbeater-style Darrieus model pictured to the immediate right, named after its French inventor. Horizontal-axis wind turbines typically either have two or three blades. These three-bladed wind turbines are operated “upwind,” with the blades facing into the wind.


Wind turbines can be built on land or offshore in large bodies of water like oceans and lakes. Though the United States does not currently have any offshore wind turbines, the Department of Energy is funding efforts that will make this technology available in U.S. waters.



Sizes of Wind Turbines

Utility-scale turbines range in size from 100 kilowatts to as large as several megawatts. Larger wind turbines are more cost effective and are grouped together into wind farms, which provide bulk power to the electrical grid. In recent years, there has been an increase in large offshore wind installations in order to harness the huge potential that wind energy offers off the coasts of the U.S.


Single small turbines, below 100 kilowatts, are used for homes, telecommunications dishes, or water pumping. Small turbines are sometimes used in connection with diesel generators, batteries, and photovoltaic systems. These systems are called hybrid wind systems and are typically used in remote, off-grid locations, where a connection to the utility grid is not available.


For more information and an awesome interactive video about how Wind Turbines work, check out this site.










UK wind power share shows record rise Due to hurricane

Thursday 23 October 2014

Two Australian Bee Species Battle Over Territory |Bee info and Facts

An international team of ecologists have discovered evidence of a massive Game of Thrones-style war between two species of stingless bees in Brisbane, Australia. These bees battled to the death for months on end, all over possession of a honey-filled hive, in a massacre that would make George R. R. Martin proud. Paul Cunningham of Queensland University of Technology is lead author of the paper published in the journal The American Naturalist.









Tetragonula carbonaria is a species of stingless bee native to Australia. They are commonly regarded as sugarbag bees because of the honey they produce in their hives. While this honey is desired by humans for consumption, it also makes the bees a target for invasion by other colonies who seek to control the vast stores of food. Thousands of raiders will descend upon the hive, ready to fight to the death, usurping the home colony and taking control of the territory. It was initially assumed that these wars would occur between different colonies of the same species, but Cunningham’s team found that this was not the case.


“The defending colony was, as we expected, Tetragonula carbonaria, but the attacking colony turned out to be a related species originating from further north, called Tetragonula hockingsi,” co-author James Hereward said in a press release.


A swarm of hockingsi worker bees blitzed the carbonaria hive, pulling out bees and mercilessly killing them. The ultimate goal of the hockingsi bees was to get their own queen in there, therefore taking control of the hive and its honey. Though carbonaria and hockingsi are both stingless species, they are incredibly formidable fighters due to their strong jaws and unceasing commitment. When opposing bees latch onto one another to fight, they never let go.


“Neither the attacker nor defender survives in these one-on-one death battles, during which a carpet of dead and dying bees can be seen on the ground. It is a sheer numbers game as to who wins,” Cunningham added. “It took three consecutive attacks over several weeks before the hockingsi bees won out. When they eventually broke through the defenses, they smothered the hive in a huge swarm, mercilessly ejecting the resident workers, drones and young queens. It was carnage!”


Months after the fighting ceased and the bees had settled, the team performed genetic analysis of the bees currently living in the hive. It confirmed that the hockingsi colony had successfully overthrown the carbonaria bees. The current queen of the hive was a hockingsi, a daughter of the queen whose army led the attack.


This melee was not an isolated incident. The team studied 250 hives over the course of five years, finding evidence of 46 separate bee slaughters, though the outcomes were not always predictable.


“And the hockingsi bees are not always the winners,” Cunningham concluded. “We still have many questions to answer, such as what instigates the attacks, and whether the young in the usurped hive are spared and reared as slaves, or killed outright.”









Information about the Caring Bee


Bees are dependent on pollen as a protein source and on flower nectar or oils as an energy source. Adult females collect pollen primarily to feed their larvae. The pollen they inevitably lose in going from flower to flower is important to plants because some pollen lands on the pistils (reproductive structures) of other flowers of the same species, resulting in cross-pollination. Bees are, in fact, the most important pollinating insects, and their interdependence with plants makes them an excellent example of the type of symbiosis known as mutualism, an association between unlike organisms that is beneficial to both parties.


Most bees have specialized branched or feathery body hairs that help in the collection of pollen. Female bees, like many other hymenopterans, have a defensive sting. Some bees produce honey from flower nectar. Honey bees and stingless bees commonly hoard large quantities of honey-a characteristic that is exploited by beekeepers, who harvest the honey for human consumption.


There are about 20,000 species of bees worldwide. Some species may not yet have been discovered, and many are either not named or have not been well studied. Bees are found throughout the world except at the highest altitudes, in polar regions, and on some small oceanic islands. The greatest diversity of bee species is found in warm, arid or semiarid areas, especially in the American Southwest and Mexico. Bees range in size from tiny species only 2 mm (0.08 in) in length to rather large insects up to 4 cm (1.6 in) long. Many bees are black or gray, but others are bright yellow, red, or metallic green or blue.


Solitary Bees

The primitive bees, like their relatives the wasps, are solitary. Each female makes her own burrow, in which she constructs earthen chambers to contain her young. She deposits pollen moistened with nectar or oil into individual cells until enough food has accumulated to provide for the young bee from egg hatching until the larva reaches full size. She then lays an egg on the pollen mass and seals the cell before going on to construct another cell.


Some bees are communal. They are like solitary bees except that several females of the same generation use the same nest, each making her own cells for housing her eggs, larvae, and pupae. A few kinds of bees are semisocial-they live in small colonies of two to seven bees of the same generation, one of which is the queen, or principal egg layer; the others are worker bees. About 1000 species of bees live in small colonies consisting of a queen and a few daughter workers. In these colonies, the differences in appearance and behavior between workers and queens are scarcely distinguishable. Such species, called primitively eusocial, form temporary colonies that die out in autumn, and only the fertilized queens survive the winter. Bumble bees are familiar examples.


The eusocial, or truly social, bees live in large colonies consisting of females of two overlapping generations: mothers (queens) and daughters (workers). Males play no part in the colony’s organization and only mate with the queens. Larvae are fed progressively-that is, cells are opened as necessary or are left open so that workers can tend the larvae. Highly eusocial bees, a few hundred species, form permanent colonies in which the queen and worker castes are markedly different in structure, each specialized for its own activities and unable to survive without the other. Colonies of eusocial bees are complex, highly coordinated societies. Individual bees may have highly specialized functions within the colony. The tasks of defense, food collection and storage, reproduction, and many other activities are regulated by the colony’s response to environmental conditions inside and outside the hive. Individuals communicate by means of chemical messages, touch, sound, and, in the case of honey bees, a symbolic dance language. The nests of many eusocial bees are very elaborate and may be constructed partially of wax secreted by the bees.


Bee Parasites and Diseases


Parasitic, or cuckoo, bees are those that do not forage or make nests themselves but use the nests and food of other species of bees to provide for their parasitic young. Parasitic bees are of two types: cleptoparasitic bees and social parasites. Cleptoparasitic bees invade the nests of solitary bees, hide their eggs in the brood chambers before the hosts lay theirs, and close the chambers. The young of the parasitic bees then feed on the food that was stored in the chamber by the host female. The eggs or young larvae of the host bee are killed either by the parasitic female or by her larvae. Social parasites are bees that kill the resident queen, lay their own eggs in the host’s cells, and then force the host’s workers to raise the young parasitic bees. Females of parasitic bees lack such special features as pollen baskets or pollen brushes since they do not forage for food for their young.


Varroa mites

Varroa destructor and Varroa jacobsoni are parasitic mites that feed on the bodily fluids of adult, pupal and larval bees. Varroa mites can be seen with the naked eye as a small red or brown spot on the bee’s thorax. Varroa mites are carriers for a virus that is particularly damaging to the bees. Bees infected with this virus during their development will often have visibly deformed wings.


Varroa mites have led to the virtual elimination of feral bee colonies in many areas, and are a major problem for kept bees in apiaries. Some feral populations are now recovering—it appears they have been naturally selected for Varroa resistance.


Varroa mites were first discovered in Southeast Asia in about 1904, but are now present on all continents except Australia. They were discovered in the United States in 1987, in New Zealand in 2000, and in Devon, United Kingdom in 1992.


Freedawn Scientia Varroa mites, Parasitic Bees, information facts of bees


These mites are generally not a problem for a strongly growing hive. When the hive population growth is reduced in preparation for winter or due to poor late summer forage, the mite population growth can overtake that of the bees and can then destroy the hive. Often a colony will simply abscond (leave as in a swarm, but leaving no population behind) under such conditions.


Varroa in combination with deformed wing virus and bacteria have been theoretically implicated in colony collapse disorder.


Treatment – A variety of treatments are currently marketed or practiced to attempt to control these mites. The treatments are generally segregated into chemical and mechanical controls.


Common chemical controls include “hard” chemicals such as Amitraz (marketed as Apivar), fluvalinate (marketed as Apistan), and coumaphos (marketed as CheckMite). “Soft” chemical controls include thymol (marketed as ApiLife-VAR and Apiguard), sucrose octanoate esters (marketed as Sucrocide), oxalic acid and formic acid (sold in gel packs as Mite-Away, but also used in other formulations). According to the U.S. Environmental Protection Agency, when used in beehives as directed, these treatments kill a large proportion of the mites while not substantially disrupting bee behavior or life span. Use of chemical controls is generally regulated and varies from country to country. With few exceptions, they are not intended for use during production of marketable honey.


Common mechanical controls generally rely on disruption of some aspect of the mites’ lifecycle. These controls are generally intended not to eliminate all mites, but merely to maintain the infestation at a level which the colony can tolerate. Examples of mechanical controls include drone brood sacrifice (varroa mites are preferentially attracted to the drone brood), powdered sugar dusting (which encourages cleaning behavior and dislodges some mites), screened bottom boards (so any dislodged mites fall through the bottom and away from the colony), brood interruption and, perhaps, downsizing of the brood cell size. A device called the varroa mite control entrance (VMCE) is under development as of 2008. The VMCE works in conjunction with a screened bottom board, by dislodging varroa mites from bees as they enter and exit a hive.


Acarine (Tracheal) mites

Acarapis woodi is a small parasitic mite that infests the airways of the honey bee. The first known infestation of the mites occurred in the British Isles in the early 20th century. First observed on the Isle of Wight in 1904,[5] the mystery illness known as Isle of Wight Disease was not identified as being caused by a parasite until 1921. It quickly spread to the rest of Great Britain. It was regarded as having wiped out the entire native bee population of the British Isles (although later genetic studies have found remnants that did survive) and it dealt a devastating blow to British beekeeping. Brother Adam at the Buckfast Abbey developed a resistant hybrid bee known as the Buckfast bee, which is now available worldwide to combat acarine disease.


Diagnosis for tracheal mites generally involves the dissection and microscopic examination of a sample of bees from the hive.


Acarine mites, formerly known as tracheal mites are believed to have entered the US in 1984, via Mexico.


Mature female acarine mites leave the bee’s airway and climb out on a hair of the bee, where they wait until they can transfer to a young bee. Once on the new bee, they will move into the airways and begin laying eggs.


Treatment – Acarine mites are commonly controlled with grease patties (typically made from 1 part vegetable shortening mixed with 3–4 parts powdered sugar) placed on the top bars of the hive. The bees come to eat the sugar and pick up traces of shortening, which disrupts the mite’s ability to identify a young bee. Some of the mites waiting to transfer to a new host will remain on the original host. Others will transfer to a random bee—a proportion of which will die of other causes before the mite can reproduce.


Menthol, either allowed to vaporize from crystal form or mixed into the grease patties, is also often used to treat acarine mites.


Nosema

Nosema apis is a microsporidian that invades the intestinal tracts of adult bees and causes nosema disease, also known as nosemosis. Nosema infection is also associated with black queen cell virus. It is normally only a problem when the bees can not leave the hive to eliminate waste (for example, during an extended cold spell in winter or when the hives are enclosed in a wintering barn). When the bees are unable to void (cleansing flights), they can develop dysentery.


Nosema disease is treated by increasing the ventilation through the hive. Some beekeepers treat hives with antibiotics such as fumagillan.


Nosemosis can also be prevented or minimized by removing much of the honey from the beehive, then feeding the bees on sugar water in the late fall. Sugar water made from refined sugar has lower ash content than flower nectar, reducing the risk of dysentery. Refined sugar, however, contains fewer nutrients than natural honey, which causes some controversy among beekeepers.


In 1996, a similar type of organism to Nosema apis was discovered on the Asian honey bee Apis cerana and subsequently named Nosema ceranae. This parasite apparently also infects the western honey bee.


Exposure to corn pollen containing genes for Bacillus thuringiensis (Bt) production may weaken the bees’ defense against Nosema. In relation to feeding a group of bees with Bt corn pollen and a control group with non-Bt corn pollen: “in the first year, the bee colonies happened to be infested with parasites (microsporidia). This infestation led to a reduction in the number of bees and subsequently to reduced broods in the Bt-fed colonies as well as in the colonies fed on Bt-toxin-free pollen. The trial was therefore discontinued at an early stage. This effect was significantly more marked in the Bt-fed colonies. (The significant differences indicate an interaction of toxin and pathogen on the epithelial cells of the honeybee intestine. The underlying mechanism which causes this effect is unknown.)”


This study should be interpreted with caution given that there was no repetition of the experiment nor any attempt to find confounding factors. In addition, BT toxin and transgenic BT pollen showed no acute toxicity to any of the life stages of the bees examined, even when the BT toxin was fed at concentrations 100 times that found in transgenic BT pollen from maize.


Small hive beetle

Aethina tumida is a small, dark-colored beetle that lives in beehives. Originally from Africa, the first discovery of small hive beetles in the Western Hemisphere was made in St. Lucie County, Florida, in 1998. The next year, a specimen that had been collected from Charleston, South Carolina in 1996 was identified, and is believed to be the index case for the United States.[8] By December 1999, small hive beetles were reported in Iowa, Maine, Massachusetts, Minnesota, New Jersey, Ohio, Pennsylvania, Texas, and Wisconsin, and was found in California by 2006.


The lifecycle of this beetle includes pupation in the ground outside of the hive. Controls to prevent ants from climbing into the hive are believed to also be effective against the hive beetle. Several beekeepers are experimenting with the use of diatomaceous earth around the hive as a way to disrupt the beetle’s lifecycle. The diatoms abrade the insects’ surfaces, causing them to dehydrate and die.


Treatment – Several pesticides are currently used against the small hive beetle. The chemical Fipronil (marketed as Combat Roach Gel) is commonly applied inside the corrugations of a piece of cardboard. Standard corrugations are large enough that a small hive beetle will enter the cardboard through the end, but small enough that honey bees can not enter (and thus are kept away from the pesticide). Alternative controls such as oil-based top bar traps are also available, but they have had very little commercial success.


Wax moths

Galleria mellonella (greater wax moths) will not attack the bees directly, but feed on the wax used by the bees to build their honeycomb. Their full development to adults requires access to used brood comb or brood cell cleanings—these contain protein essential for the larval development, in the form of brood cocoons. The destruction of the comb will spill or contaminate stored honey and may kill bee larvae.


When honey supers are stored for the winter in a mild climate, or in heated storage, the wax moth larvae can destroy portions of the comb, though they will not fully develop. Damaged comb may be scraped out and will be replaced by the bees. Wax moth larvae and eggs are killed by freezing, so storage in unheated sheds or barns in higher latitudes is the only control necessary.


Because wax moths cannot survive a cold winter, they are usually not a problem for beekeepers in the northern U.S. or Canada, unless they survive winter in heated storage, or are brought from the south by purchase or migration of beekeepers. They thrive and spread most rapidly with temperatures above 30 °C (90 °F), so some areas with only occasional days that hot, rarely have a problem with wax moths, unless the colony is already weak due to stress from other factors.


Freedawn Scientia Varroa mites, Parasitic Bees, information facts of bees, Bee treatment, Bee hives


Treatment – A strong hive generally needs no treatment to control wax moths; the bees themselves will kill and clean out the moth larvae and webs. Wax moth larvae may fully develop in cell cleanings when such cleanings accumulate thickly where they are not accessible to the bees.


Wax moth development in comb is generally not a problem with top bar hives, as unused combs are usually left in the hive during the winter. Since this type of hive is not used in severe wintering conditions, the bees will be able to patrol and inspect the unused comb.


Wax moths can be controlled in stored comb by application of the aizawai variety of Bacillus thuringiensis spores by spraying. It is a very effective biological control and has an excellent safety record.[citation needed]


Wax moths can be controlled chemically with paradichlorobenzene (moth crystals or urinal disks). If chemical methods are used, the combs must be well-aired for several days before use. The use of naphthalene (mothballs) is discouraged because it accumulates in the wax, which can kill bees or contaminate honey stores. Control of wax moths by other means includes the freezing of the comb for at least 24 hours.


You can find lots more information on Bee Parisites, Mites and Diseases here, or you can download a helpful information and treatment pack (PDF) here.


Here is another very helpful and very detailed ebook with lots of information about bees and if you are wanting to start your own hive, a very good place to start.









Bee Facts


Their sting has some benefits

A toxin in bee venom called melittin may prevent HIV. Melittin can kill HIV by poking holes into the virus’s protective envelope. (Meanwhile, when mellitin hitches a ride on certain nanoparticles, it will just bounce off normal cells and leave them unharmed.) Scientists at Washington University in St. Louis hope the toxin can be used in preventative gels.


Bee stings may also ease pain caused by rheumatoid arthritis. Researchers at the University of Sao Paulo found that molecules in bee venom increase your body’s level of glucocorticoid, an anti-inflammatory hormone.


When they change jobs, they change their brain chemistry

Bees are hardwired to do certain jobs. Scout bees, which search for new sources of food, are wired for adventure. Soldier bees, discovered in 2012, work as security guards their whole life. One percent of all middle-aged bees become undertakers—a genetic brain pattern compels them to remove dead bees from the hive. But most amazingly, regular honeybees—which perform multiple jobs in their lifetime—will change their brain chemistry before taking up a new gig.


Their brains defy time

When aging bees do jobs usually reserved for younger members, their brain stops aging. In fact, their brain ages in reverse. (Imagine if riding a tricycle didn’t just make you feel young—it actually made your brain tick like a younger person’s.) Scientists at Arizona State University believe the discovery can help us slow the onset of dementia.


They have personalities

Even in beehives, there are workers and shirkers. Researchers at the University of Illinois found that not all bees are interchangeable drones. Some bees are thrill-seekers. Others are a bit more timid. A 2011 study even found that agitated honeybees can be pessimistic, showing that, to some extent, bees might have feelings.


They have Viking-like supervision

Bees use the sun as a compass. But when it’s cloudy, there’s a backup—they navigate by polarized light, using special photoreceptors to find the sun’s place in the sky. The Vikings may have used a similar system: On sunny days, they navigated with sundials, but on cloudy days, sunstones—chunks of calcite that act like a Polaroid filter—helped them stay on course.


They’re nature’s most economical builders

Serial killers behave like bees. They commit their crimes close to home, but far away enough that the neighbors don’t get suspicious. Similarly, bees collect pollen near their hive, but far enough that predators can’t find the hive. To understand how this “buffer zone” works, scientists studied bee behavior and wrote up a few algorithms. Their findings improved computer models police use to find felons.


Quick Facts


> Bees are the only insect in the world that make food that people can eat
> Honey contains all of the substances needed to sustain life, including enzymes, water, minerals and vitamins
> Eating honey can help you smarter! It is the only food to contain ‘pinocembrin’ that is an antioxidant that improves brain function.
> One bee will only make 1/12 of a teaspoon on honey in its entire life
> Many plants rely on insects like bees in order to be pollinated; which is why they provide nectar to say thanks
> A colony of bees can contain between 20,000 and 60,000 bees, but only one queen bee
> A bee’s wings beat 190 times a second, that’s 11,400 times a minute!
> Worker bees, who are all female, are the only ones who will attack you, and only if they feel threatened
> It has been estimated that it would take 1,100 bee stings to produce enough venom to be fatal
> Each colony smells different to bees, this is so they can tell where they live!
> It would take 1,100 bees to make 1kg of honey and they would have to visit 4 million flowers
> There are 900 cells in a bee’s brain
> The queen bee will lay around 1,500 eggs a day
> Bees have two separate stomachs; one for food and another just for nectar
> Honey has natural preservatives so that it won’t go bad
> A third of all the plants we eat have been pollinated by bees
> Bees have been around for more than 30 million years
> Bees communicate by smells called ‘pheromones’ and by performing special ‘dances’
> Bee keepers only take the honey that the bees do not need, but this can be as much as 45kg from one hive!
> There are lots of different types of honey which taste different depending on the flowers used to make it









Some Awesome and Factual Bee Pictures










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Two Australian Bee Species Battle Over Territory |Bee info and Facts