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his implies that twitter s resembles more of a one way one to many publishing service more than a two way peer to peer communication network while all follow a long tail some long tails are longer than others via harvard business blog and some more twitter stats from techcrunch here read more summary only at 7 04 2009 0 comments labels men vs women technology interesting articles of the week how the us surplus became a deficit why e books are stuck in a black and white world know thyself tracking every facet of life 24 7 365 for first time over 1 2 of energy funding goes to clean energy which has quadrupled in last 4 years giving up my ipod for a walkman read more summary only at 7 04 2009 0 comments labels interesting articles friday july 03 2009 first hybrid solar power plant opens in israel concentrating solar power csp plants are an amazing wonderful renewable energy technology as long as the sun is shining however solar power alone cannot provide on demand power especially in the case of off grid applications aora solar out of yavne israel is almost complete with the world s first ever solar hybrid plant which will combine concentrated solar power with a hybrid microturbine to generate power 24 hours a day this technology could help provide off grid communities the necessary power without having to run miles of costly transmission lines installation of the new hybrid system is less than 10 days away from being completed at the kibbutz sammar in israel once up and running on june 24th the plant will generate 100 kw of on demand power plus 170 kw of thermal power the plant consists of 30 heliostats mirrors that track the sun and direct its rays up to the 30 meter tall tower where all the sunlight from the heliostats is concentrated this concentrated sunlight heats compressed air which drives an electric turbine the tower itself is a welcome change from other power towers we have seen in the past it actually looks good with its tulip flower shape the hybrid part of the plant allows for on demand power due to its inline microturbine when the sun has set for the day or if it is cloudy biodiesel natural gas or bio fuels can be used to run the microturbine which then drives the electric turbine the hybrid system has the capacity to power 70 homes 24 7 a hybrid system like this has the potential to provide distributed generation or off grid power to communities companies or factories as production of bio fuels becomes more efficient and sustainable we re hoping to see more and more hybrid solar concentrating systems i like how it has the ability to use other fuels when the sun isn t shining this solves the intermittency problem of solar power i wonder how much it cost to build and how much they will charge per kwh via inhabit and tree hugger read more summary only at 7 03 2009 1 comments labels energy environmentalism solar sylvia earle s ted prize wish to protect our oceans sylvia earle explains her ted prize wish to bring knowledge of our oceans to a wide audience and galvanize support in favor of marine protected areas we invite a variety of responses from tedsters in pursuit of this goal development of technologies that would permit deep sea exploration in order to make the invisible visible supporting or organizing expeditions to explore proposed hope spots helping make the scientific case for a network of mpas identifying and exploring candidate mpas creating a media campaign in support of mpas backing the upcoming oceans documentary to ensure wide viewership i think this is a great wish and hope she is successful in her endeavor as loyal fat knowledge readers know i am a huge fan of deep sea exploration mapping the bottom of the ocean is 4 on my list of scientific achievements i am looking forward to and wish all of nasa s funds would be redirected here her deep search foundation is a worthy cause as well aside it pains me to see that another of the ted prizes went to jill tarter who wants to improve seti if there is a bigger waste of brain power in the world than seti i don t know what it is while the chance of finding new strange and fascinating terrestrial life at the bottom of the ocean is almost 100 these guys are spending their time trying to find et which has worse odds than the lottery the more mpas the better i believe that mpas allow fishermen to have larger catches as well i am sure i have read this but can t find the link right now which gives it an economic rational as well the world database on protected areas is a cool google maps mashup that shows where all the mpas in the world are located hopefully we can go from 1 of the sea being protected to 5 in the next 50 years read more summary only at 7 03 2009 2 comments labels environmentalism nature video deforestation causes boom and bust development in the amazon clearing the amazon rainforest increases brazilian communities wealth and quality of life but these improvements are short lived according to new research published today 12 june in science the study by an international team including researchers at the university of cambridge and imperial college london shows that levels of development revert back to well below national average levels when the loggers and land clearers move on since 2000 155 thousand square kilometres of rainforest in the brazilian amazon have been cut down for timber burnt or cleared for agricultural use forest clearance rates have averaged more than 1 8 million hectares per year roughly the area of kuwait and the deforestation frontier is advancing into the forest at a rate of more than four football fields every minute the researchers analysis revealed that the quality of local people s lives measured through levels of income literacy and longevity as mentioned above increases quickly during the early stages of deforestation this is probably because people capitalise on newly available natural resources including timber minerals and land for pasture and higher incomes and new roads lead to improved access to education and medical care and all round better living conditions however the new results suggest that these improvements are transitory and the level of development returns to below the national average once the area s natural resources have been exploited and the deforestation frontier expands to virgin land quality of life pre and post deforestation was both substantially lower than the brazilian national average and was indistinguishable from one another this article shows that greed isn t the problem here but rather short sightedness that even from a selfish perspective it is not in anyone s long term interest to cut down the trees instead of using an environmental argument to stop those that would cut down the forest it would be more effective to show how it is not in their selfish long term interest to do so via sciencedaily read more summary only at 7 03 2009 0 comments labels economics environmentalism thursday july 02 2009 netflix ratings and the napoleon dynamite problem bertoni says it s partly because of napoleon dynamite an indie comedy from 2004 that achieved cult status and went on to become extremely popular on netflix it is bertoni and others have discovered maddeningly hard to determine how much people will like it when bertoni runs his algorithms on regular hits like lethal weapon or miss congeniality and tries to predict how any given netflix user will rate them he s usually within eight tenths of a star but with films like napoleon dynamite he s off by an average of 1 2 stars the reason bertoni says is that napoleon dynamite is very weird and very polarizing it contains a lot of arch ironic humor including a famously kooky dance performed by the titular teenage character to help his hapless friend win a student council election it s the type of quirky entertainment that tends to be either loved or despised the movie has been rated more than two million times in the netflix database and the ratings are disproportionately one or five stars worse close friends who normally share similar film aesthetics often heatedly disagree about whether napoleon dynamite is a masterpiece or an annoying bit of hipster self indulgence when bertoni saw the movie himself with a group of friends they argued for hours over it half of them loved it and half of them hated it he told me and they couldn t really say why it s just a difficult movie mathematically speaking napoleon dynamite is a very significant problem for the netflix prize amazingly bertoni has deduced that this single movie is causing 15 percent of his remaining error rate or to put it another way if bertoni could anticipate whether you d like napoleon dynamite as accurately as he can for other movies this feat alone would bring him 15 percent of the way to winning the 1 million prize and while napoleon dynamite is the worst culprit it isn t the only troublemaker a small subset of other titles have caused almost as much bedevilment among the netflix prize competitors when bertoni showed me a list of his 25 most difficult to predict movies i noticed they were all similar in some way to napoleon dynamite culturally or politically polarizing and hard to classify including i heart huckabees lost in translation fahrenheit 9 11 the life aquatic with steve zissou kill bill volume 1 and sideways i wonder if the problem isn t the movies as much as the rating system itself instead of a single 1 5 star rating maybe they should also include a score for the variance or list the probabilities that you will rank the movie from 1 5 stars when you looked at napoleon dynamite it could say you have a 30 chance of rating it 1 star 10 chance for 2 star 20 3 star 10 4 star and 30 5 star whereas x men might look like 5 1 star 20 2 star 50 3 star 20 4 star and 5 5 star while on average you are likely to give both a 3 star rating you could choose whether to take the gamble on a movie that you might love or stick with seeing on that you are likely to find very average more interesting information on the netflix prize and how people are trying to solve it in the article i am also curious how much the recommendations for any one person differ between the various engines does one engine do a significantly better job of recommending movies for some people than the other engines if that is the case then netflix should allow you which engine you want to use similar to how you could choose which of staff members on the staffs picks you wanted to go with but think twice before going with a gene pick over a vincent via ny times read more summary only at 7 02 2009 0 comments labels other nintendo wii vitality sensor and it looks like nintendo s answer to microsoft s project natal is a pulse detector yep ninty s just announced the wii vitality sensor a finger sensor which attaches to the wiimote to read your pulse details on how the accessory is going to be used in games are pretty vague but it appears the idea is to check stress help you relax and just generally chill out and be groovy i am curious to see how nintendo integrates this into games i used the emwave before and it was kind of cool to see you heart beat show up on the computer screen the biofeedback made it easier to relax other interesting takes on this include the simmer down sprinter a game by philips design and the stresseraser but i bet nintendo will do a much better job of making it fun to use i am not a big fan of the wired finger clip though i hope nintendo makes this thing wireless and attaches it to your arm or ear instead via engadget read more summary only at 7 02 2009 2 comments labels technology culture requires a dense population mark thomas and his colleagues at university college london suggest that cultural sophistication depends on more than just the evolution of intelligence it also requires a dense population if correct this would explain some puzzling features of the archaeological record that have hitherto been put down to the arbitrary nature of what has survived to the present and what has not they are trying to explain the pattern of apparent false starts to modern human culture the species is now believed to have emerged 150 000 200 000 years ago in africa and to have begun spreading to the rest of the world about 60 000 years ago but signs of modern culture such as shell beads for necklaces the use of pigments and delicate sophisticated tools like bone harpoons do not appear until 90 000 years ago they then disappear before popping up again and also sometimes disappearing until they really get going around 35 000 years ago in europe the team drew on an earlier insight that it requires a certain number of people to maintain skills and knowledge in a population below this level random effects can be important the probability of useful inventions being made is low and if only a few have the skills to fabricate the new inventions they may die without having passed on their knowledge in their model dr thomas and his colleagues divided a simulated world into regions with different densities of human groups individuals in these groups had certain skills each with an associated degree of complexity such skills could be passed on more or less faithfully thus yielding an average level of skills that could vary over time the groups could also exchange skills the model suggested that once more than about 50 groups were in contact with one another the complexity of skills that could be maintained did not increase as the number of groups increased rather it was population density that turned out to be the key to cultural sophistication the more people there were the more exchange there was between groups and the richer the culture of each group became dr thomas therefore suggests that the reason there is so little sign of culture until 90 000 years ago is that there were not enough people to support it it is at this point that a couple of places in africa one in the southernmost tip of the continent and one in eastern congo yield signs of jewellery art and modern weapons but then they go away again that dr thomas suggests corresponds with a period when human numbers shrank climate data provides evidence this shrinkage did happen according to dr thomas therefore culture was not invented once when people had become clever enough and then gradually built up into the edifice it is today rather it came and went as the population waxed and waned via the economist read more summary only at 7 02 2009 0 comments labels other wednesday july 01 2009 the ecological disaster that is dolphin safe tuna is dolphin safe tuna really better for the environment southern fried science makes the case that switching from following dolphins to using floating objects to catch tuna is actually worse overall for sea life let s compare the bycatch rates of floating object associated tuna and dolphin associated tuna ten thousand sets of purse seine nets around immature tuna swimming under logs and other debris will cause the deaths of 2...
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