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A fluctuation in how much electricity is produced so we need smart grades and the test lab. test facilities here and yes in addition to this roof we have a test area and i'm saying ns and another one in here just that and it in and sing and it's twenty five percent of the energy requirements and in his estate and no less than one hundred percent is produced locally from solar power the future of the energy transition seems to have arrived the synchronous grid of continental europe as it's called will only remain stable in its fifty heads frequency if we manage to keep the days centralized prod...

Black softens while the red gets the most. and the onboard computer automatically drives the tractor to the weed infested areas. the quantity of herbicide is measured precisely. two weeks later the drone flies to the treated test area to check the results things look promising. because we used up to sixty percent less herbicide last year dealing with missiles and the sugar beets. using a drone has economic but mostly environmental benefits and since i only treat those areas where we'd start growing. drones or even finding a place in biodiversity research such as rescuing endangered butterflies...

Can be mapped with a drone in a few minutes. but first the data from the drone has to be processed at the university's institute of medicine. from a jigsaw puzzle of single images a very accurate overall picture of the test area is produced. that's followed by a complex image analysis. and classification into weeds crop plants and soil for example where we're growing sugar beet is done with a pixel density measurement using an image analysis program. we measure the number of green pixels between the rows. it works like a we test. if the number of green pixels exceeds a certain threshold these ...

Activity there for the first time in several weeks. the officials say there appear to be modifications around a key tunnel entrance to an underground test area. >> it would look like they're preparing for another nuclear test. the tempo has increased the last couple of years. >> reporter: u.s. officials say military options for north korea have been updated and will be presented to president trump if kim's regime conducts another nuclear test, but it is not clear if the u.s. would respond militarily. tonight the secretary of state is blasting kim for acting like a mafia don to pay for his weap...

Can't you do this on models sxwnchts. >> the short answer is no. >> the director of the university of maryland, since 1949 they tested everything from plane models to cars to roofing, for form and high winds. >> that will tell you how efficient or inefficient it is. >> or whether it will survive in the case of a hurricane. >> the week we were there, they watched how safety signs for offshore oil rigs would stand up for one hour to 100 miles an hour winds. >> what you can find out is whether that particular product will survive in any given wind speed. >> barlow took us inside the wind tunnels,...