Euro airliner firm Airbus is sponsoring a glider capable of soaring to greater altitudes than the famous SR-71 Blackbird spy aircraft.…
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We learn a lot about objects by manipulating them: poking, pushing, prodding, and then seeing how they react. We obviously can't do that with videos — just try touching that cat video on your phone and see what happens. But is it crazy to think that we could take that video and simulate how the cat moves, without ever interacting with the real one? Researchers from MIT's Computer Science and Artificial Intelligence Laboratory have recently done just that, developing an imaging technique called Interactive Dynamic Video (IDV) that lets you reach in and “touch” objects in videos. Using traditional cameras and algorithms, IDV looks at the tiny, almost invisible vibrations of an object to create video simulations that users can virtually interact with.
Image credit: Abe Davis/MIT CSAIL
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The Yellowstone River in Yellowstone National Park after a late spring snowstorm. Earlier annual snowmelt periods may decrease streamflow and reduce forests' ability to regulate atmospheric carbon dioxide, according to a new study. By mid-century, a shift in snowmelt timing could lead to 45 percent reduction of forest CO2 uptake.
Image credit: Theodore Barnhart
When an earnest undergraduate quizzed the aged E M Forster about the good life, the novelist is supposed to have replied: “Don't ask about the good life. Find out what you enjoy.” I'm not sure of the source of the story, which I've heard in more than one version, but the dictum attributed to the novelist encapsulates a popular type of liberal philosophy. Arguments about the good are unending and inconclusive. Despite Aristotle, Buddha, Laozi and all those who followed them, there is no more agreement on the subject than there was two and a half millennia ago. Given the essential elusiveness of goodness, why not focus on something we can judge with reasonable confidence? After all, we all know what we like. If we stick to what we enjoy, we can hardly go wrong.
The trouble is that, in fact, what we like is often unclear to us. As Tom Vanderbilt writes:
Related: The secret of taste: why we like what we like | Tom Vanderbilt
Continue reading..."I think the Bayindir finds are Phrygian."
"This is a fabulous discovery. I have never seen anything like it. Each and every piece is of purely Phrygian type."
"Thanks Suzan. I've written about this with Keith DeVries in 2012, and we still stand by that."
"Dear Suzan, you may consult the catalog entry of the exhibition Assyria to Iberia, at the Dawn of the Classical Age, edited by Joan Aruz, Sarah B. Graff and Yelena Rakic, New York, 2014, p. 308, nr. 180 with previous references as well as the attached article on the same subject. Should you need any further help, do not hesitate to contact me.
Athanasia"
"Initially attributed to a Greek artist under strong Near Eastern influence, more recently the figurine has been convincingly suggested to have originated from a Phrygian workshop. It has also been proposed that this unique object was made as a decorative attachment for the magnificent throne of Midas. . . ."
"Although it could be argued that stylistic analysis is in the end largely subjective, even a cursory look at the items compared shows no components of the Delphi figure's face (mouth, eyes, etc.) or hair reflect Phrygian features."
"The ivory piece from Delphi, currently on display at the University Museum in Philadelphia, is assuredly not Phrygian [emphasis added], in my opinion, but the product of a west Anatolian or East Greek workshop. The meander is found in Phrygian furniture, but it came to be such a widely used motif that one cannot use it to determine origin. It is a strange piece that I have wondered about for years. The lion, for whatever reason has an erection, for which I know of no parallels."
"That is not an erection!"
"Have you read Brian Rose's 2012 article in The Archaeology of Phrygian Gordion? His comparanda is not convincing[emphasis added], and it is generally acknowledged by colleagues that there is no evidence [emphasis added] that the ivory Lion Tamer statuette is Phrygian in style per se.
The Delphi Museum's posted description [you emailed me] is much more accurate than Rose's contention. Do you know if the Delphi Museum post is official? Is this what the museum label for the Lion Tamer says? Can you please let me know? I am curious.
In terms of the meander design on the base (which is published upside down in Rose's article), this exact pattern is not found on any Phrygian furniture that I know of, and the cross-within-a-square is particularly unusual in that regard.
In terms of form and joinery, the piece was recovered in fragments and has been restored; not all of it is preserved, and I have not seen the bottom of the base. There is a mortise (square cutting) in the back of the figure, but it is shallow, suggesting that the Lion Tamer was not a structural element but decorative. I am not sure how or where the Lion Tamer would have been attached to whatever it once belonged to.
Apart from the style of the ivory figure, the pattern on the base, and its form and joinery, however, one must consider whether the Lion Tamer is from a piece of Phrygian furniture at all -- and whether there is any evidence that it "is" or "may be" from Midas's famous throne.
1. First, a large collection of Phrygian royal furniture survives from the tombs at Gordion, and none of it has carved figures as elements, let alone ivory figures of this sort. You can see what the Gordion furniture looks like from my publications, particularly my 2010 Brill book on the furniture from Tumulus MM (in the MMA library, the Bard Graduate Center library, and elsewhere). A brief summary and bibliography can be found in the Wikipedia article:
https://en.wikipedia.org/wiki/Gordion_Furniture_and_Wooden_Artifacts
Although there are no "thrones" from the Gordion tombs, there was a small chair in Tumulus MM, but it has no carved human figures -- only a crest with small animals in panels carved in relief.
There were ancient Near Eastern thrones that had carved human figures (or deities) as elements, but there is no evidence of this from Phrygia. Such figural elements occur initially in the third millennium B.C., and they are found later in Assyria, Urartu, and elsewhere in the first millennium B.C.
Ivory attachments of various types are well known from the second and first millennia in the ANE [Ancient Near East], but ivory attachments are not found on the royal furniture from the Gordion tombs. Several small, square ivory plaques were excavated in association with wood fragments from Megaron 3 on the City Mound at Gordion, but the figures carved in relief on these plaques are Phrygian in style, like those on the crest rail of the chair from Tumulus MM -- and bear no stylistic resemblance to the Lion Tamer from Delphi. You can read about ANE furniture in my article, "Furniture in Ancient Western Asia," here attached.
Rather, the design and decoration of Phrygian royal furniture involved the abstraction of three-dimensional forms, and elaborate inlaid geometric patterns with complex symmetry, including mazes, apotropaic and religious symbols, and "genealogical patterns." Phrygian furniture seems to be completely different from its eastern counterparts. The examples we have are made of wood, typically boxwood inlaid with juniper and walnut, which survived in relatively good condition in several tombs at Gordion.
So, the ivory Lion Tamer is in no way characteristic of Phrygian furniture, in terms of extant evidence. In fact, it looks completely unrelated in this regard.
2. Second, might the Lion Tamer have come from the throne that Midas dedicated in the sanctuary of Apollo at Delphi? Although I suppose it is remotely possible, there is absolutely no evidence for this contention. As already discussed, there is no evidence that the statuette is actually Phrygian, although it may have been made somewhere in Anatolia. And carved figures of this type are not found on Phrygian royal furniture as we know it.
But let's just imagine that Midas did have a throne with carved figures on it. Maybe he imported it from Urartu or Assyria. Even if that were the case, there is no evidence that this particular carved figure came from it [emphasis in original]. Indeed, the Lion Tamer does not look either Assyrian or Urartian, and it is hard to tell exactly where it was made or what it was once attached to.
I do not doubt that Herodotus saw a throne at Delphi that he believed was dedicated by King Midas [Herodotus 1.14). Unfortunately, he does not describe it.
I gave a lecture on April 2, 2016, at the Penn Museum at the conference, "The World of Phrygian Gordion," in which I said all these things. Brian Rose was in attendance, as the convener of the conference. He heard what I said and appeared to acknowledge the cogency of my argument. Nonetheless he continues to stand by his 2012 article.
Oscar[Muscarella]'s source article on the Lion Tamer is very good on the various issues. I also plan to write an article on "Midas's Throne," as it is important that Rose's article not stand unchallenged."
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Looking for a healthy variety of bugs? You might want to try searching in your wealthiest friend's house. Neighborhood income is a good predictor of the number of kinds of bugs in homes.
Nighttime driving restrictions on teens may save lives, a study finds, but should probably be shifted to include late evening. A third of all fatal crashes with teen drivers happen after dark.
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A Red Deer Stag in a misty meadow, photographed so that the low morning sun created a halo around its velvet-covered antlers.
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Pentacon 30mm f/3.5
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Seymour Papert was a pioneer in artificial intelligence and learning with technology. He died this week at 88.
Despite a server breached at the DNC and the controversy over Hillary Clinton's private email server, a prominent cybersecurity expert say she's the better choice for president.
DraftKings and FanDuel suspended operations there after the state's attorney general argued they were essentially gambling sites. A new state law declares fantasy sports to be games of skill.
A Hillary Clinton fundraiser will take place at BlackHat in Las Vegas. Cybersecurity experts there say they support her over Donald Trump despite all the controversy over her email server.
The Vacuum Cleaner Museum in St. James, Mo., houses more than 750 vacuums, including some that date back to just after the Civil War. Curator Tom Gasko is a former door-to-door vacuum salesman.
The Design Business Association surveyed its membership three weeks after the Brexit vote to get a snapshot of how the industry is feeling. Despite the tangible and real sense of unease around the uncertainty Brexit has created, the industry continues to be optimistic, and there will be many who grasp the opportunities that change brings with both hands.
One member, Make It Clear member Jay Nicholl, says: “Design is about embracing change and realising the opportunities it brings. We only do our jobs if we help our clients change something.
“Design can be a positive force for encouraging clients to embrace the change that the referendum result will bring, helping frame challenges as opportunities and designing solutions.”
The success of the industry moving forward depends a great deal of course upon the ability of the government to bring stability and reassurance that trade, free movement of talent and international relations will be prioritised and supported during the EU negotiations.
In addition the government will need to invest in and nurture the future of creative talent in the UK. The recent EBACC decision presents a worrying outlook on how government views creative thinking and its potential to differentiate the UK. Without the flow of creative talent coming through the pipeline either from UK schools, or through immigration, creative talent could be severely compromised.
This is where a strong trade association is essential. The DBA will be lobbying government and business at every opportunity, spreading the message that UK design is a potent business asset and a sound commercial investment.
The findings of the survey are currently being fed into work the DBA is doing with the Creative Industries Federation, and the Creative Industries Council, as well as guiding our direct discussions with government in the coming months.
Our members have shown us that there are three main areas that they are concerned about and three areas, which are can become opportunities.
Design operates on a global stage, and a broad international perspective is imperative for creative ability and essential to help drive up standards. We need the best of the best. If the flow of creative talent through immigration is restricted, the pressure is on the government to support the design industry and education sector to develop home-grown talent, by investing in and championing creative subjects. And why do they need to? Because the creative industries contribute massively to the UK economy, and design is the fastest growing sector within it.
Is the UK going to be viewed as too insular to be able to offer a valid global perspective when delivering creative work? The cultural richness of our creative industries is fundamentally important. All UK businesses will need to communicate skilfully and loudly to the world design agencies can help with this.
Consultancies that work with public sector, cultural institutions, charities, higher education, research and similar sectors are concerned that work flowing through EU funded projects will reduce. Also that UK design consultancies will now be cut off from access to the database of large EU tenders, which EU regulations require to be shared widely across member states. Government must ensure that small companies are able to go for, and win, government tenders.
Fluctuating sterling, business uncertainty and the potential for those who only see design as a commodity to cut that spend first are all seen as barriers to growth. But as sterling remains weak, the opportunity increases to win more overseas projects, as UK agencies become more competitive on price.
Change requires communication and design does some of its best and most effective work in dynamic environments. As real and perceived challenges arise, design agencies are well placed to help their clients navigate them. Design is an investment, not a cost and it demonstrates ROI time and time again.
The onus is on us now to develop new ways of doing international business. It's a global marketplace and there's a clear opportunity for British design to grow its status across the globe.
The post 6 things designers should consider following Brexit appeared first on Design Week.
Airbnb opened Samara this week, an innovation and design studio which looks to bring together design and engineering experts.
Based within the company's San Francisco headquarters, the space hopes to transform Airbnb from a design-focused company providing a service for consumers to a studio capable of designing and supporting other projects.
The first project to come out of Samara is the Yoshino Cedar House, a permanent house designed for an exhibition space in Tokyo, which looks to encourage a better relationship between hosts and guests.
Following the exhibition, the house will be installed in small Japanese village Yoshino and will be available to hire. Projects like this aim to increase services available to Airbnb's community of users.
Instagram has taken a turn towards fleeting photo and video reels, which disappear after 24 hours a strikingly similar feature to rival social media app Snapchat.
Snapchat Stories also lets users personalise photos and videos with emojis and images and “draw” on them with text and paintbrushes.
The UX design update takes the social media platform away from static images and more towards a moving, living reel of action perhaps a shift that complements Instagram's rebrand earlier this year, which saw it drop its vintage-looking camera icon for a more modern, minimal look.
Many social media apps are turning to live media now, with Facebook which owns Instagram investing heavily in 360° video and silent/subtitled video for its mobile newsfeed advertising, and Snapchat of course kicking off the temporary video clip trend in 2011.
Theatre set design is increasingly becoming less restricted by a physical stage this week, the National Theatre opened a virtual reality studio which showcases how shows are using advanced technology to captivate existing audiences, and entice new ones.
The studio will be a space where set and digital designers can work with directors, writers and actors to produce immersive experiences, and also use VR within the design process itself.
Currently the Immersive Storytelling Studio presents four very different pieces of work that the theatre has created using VR technology: a music video experience from last year's Wonder.Land show; an educational story created in collaboration with the BBC about the 1916 Easter Rising; emotional insight into a Sudanese refugee's journey through the Calais Jungle; and a look at a National Theatre cast rehearsal.
The studio is a signifier towards the future of set design, and will be a springboard for more advanced VR applications in the future.
The Beijing Organising Committee for the 2022 Olympic and Paralympic Winter Games announced this week that it is looking for people to express interest in creating the games' logos.
The brief is currently vague, but states that the visual identities would need to reference the Beijing event and broader Chinese culture, capture the spirit of the Olympics and Paralympics, and embody the culture and values of the host city.
The Beijing Organising Committee has not yet made clear whether only professional designers can apply, or whether anybody can.
The Tokyo 2020 Olympic and Paralympic Games previously saw much controversy, when logos created by professional designer Kenjiro Sano were dropped and replaced following a plagiarism row and a subsequent competition open to the public.
An extensive report from research charity Nesta and Creative England has shown that design is performing exceptionally well compared to other creative sectors.
Between 2007 and 2014, the research shows that design had the highest employment rates, and has the most number of businesses as well as the highest turnover, alongside the software and digital sector.
It also proves that the creative industries as a whole are growing faster than any other business sector in the UK, with its Gross Value Added (GVA) totalling £84.1 billion in 2014.
While London is the most thriving location for the creative sector, responsible for 40% of jobs, the report highlighted other nationwide hotspots, such as Glasgow, Brighton and Liverpool.
The makers of the report hope the research will act as sufficient evidence for government to invest more in creativity, and to focus on developing areas outside of London.
The report reads: “Over half of Local Enterprise Partnerships fail to mention the creative industries in their strategy plans. We hope that [this] evidence…will persuade some of them to…take action to boost the creative industries' growth that is taking place on their doorsteps.
“We also believe that national and devolved governments can play a more active role to scale up creative clusters outside London and the South East.”
The post 5 important things that happened in design this week appeared first on Design Week.
A peninsula near Monaco is home to an array of modernist architecture, including houses by two stars of the scene, and a revamped visitor centre is helping to show it all in the best light
Cap Martin is a rocky finger barely 2km long that pokes out into the Mediterranean at Roquebrune, just east of Monaco but it's one of the most important sites in the history of modern architecture, and of women in design. The collection of fabled buildings at its heart was rebranded Cap Moderne when it received visitors for the first time in 2015 (only ad hoc access was possible before this).
Recently, a new, permanent visitor centre opened up in a former train carriage at the nearby SNCF station; a shipping container had been used as a temporary information post. Le Corbusier's simple holiday home, Le Cabanon has been open for guided visits for a few years but now the famous Etoile de Mer restaurant next door sadly no longer a functioning eatery is open too, since the death last year of Robert Rebutato, son of the former restaurateur.
Continue reading...The sameness of office life has a way of dulling your senses, lulling you into a dreamlike state and turning you into a task robot, mindlessly staring into the world wide ether day after day. Your only solution to avoid becoming that sad sap who is so immune to the world around them that they wear their phone headset both into and out of the bathroom, while carrying on a conversation with the caller the entire time, is to bust out of your confines and go on a creative road trip. You heard that right a creative road trip, which marries the freedom and exploration of travel with your artistic passion. It's the chance to move outside of your normal working conditions, where you have all of your tools, and force yourself to make something outside of your comfort zone.
The route that Winslow (right) and Ackerman (left) took from Maine to Oregon.
Take 3D artist Craig Winslow. When he moved from Portland, Maine to Portland, Oregon, he turned the coast-to-coast drive into a personal quest to produce daily, impromptu light installation projections at each of his 15 city stops, many of which were hundreds of miles apart and completely new to him. Oh, and he pushed himself to finish one light installation each day, and that often meant he had to grind away through the night to complete each concept before sunrise. The endeavor, Projecting West, was one-part scenic drive, one-part the chance to make work unlike any other he had created, and one-part personal challenge to see if he could do it.
Winslow convinced his buddy Mike Ackerman, a Bay Area concept designer, to join him and the two packed themselves, a pair of light projectors, and one generator into a gray Honda Element and took off. Though they had successfully raised $7,038 via Kickstarter to cover their expenses, they hit the road weeks before the funds actually were transferred into their bank account. “We were always going to do it for ourselves, whether or not we raised the money,” says Winslow. He handled the projection mapping at each stop, while Ackerman designed the different elements that would be projected. For setting backdrops, they used mooring buoys in a Maine harbor, an empty silo in Buffalo, New York, an old wall advertisement in Omaha, Nebraska, a barn and fence in Montana, and a small forest grove in Idaho. While the locales were unique, their process was uniform: pull into a town in the early evening and throw an installation up against an unsuspecting backdrop. Then they'd orchestrate their light show that revolved around a fictional narrative of their main “character” Little Buddy taking a trip, videotape the result to show their backers, and pack up their equipment by the time dawn broke. Sometimes they'd catch a few winks during the day, other times if they were in a real hurry they simply went sleepless.
The trip resulted in more than personal satisfaction and self-discovery; Winslow had a catchy side project that ultimately helped him land a spot as an Adobe Creative Resident this year, where he is being paid a 12-month salary to further explore the field of light projection.
Here Winslow shares his advice on how to set up your own creative road trip that will spark your imagination, compel you to adapt on the fly, and help you strike a balance between the pressures and pleasure of working on a challenging albeit rewarding project.
“When we arrived in the cities, we usually had a vision of what we wanted to do, but we still had to find the right location. Our goal wasn't to find a blank wall. That would be a curse for me. If you have a blank canvas, you tend to overscope and go nuts with it. When you have limitations, it forces you to make decisions quickly based on your landscape, so we were looking for existing elements that could provide an interesting surface like grass or trees. Coming into Chicago, I really wanted to project under a bridge, and we found a great spot under a bridge that wasn't super dark, but had very interesting shadows. Instead of fighting the streetlights, we embraced them, focusing on the shadows to put new architecture into story as Little Buddy wandered through a city, following his compass. The very next night, we arrived in Omaha and didn't find a location until midnight. Feeling impending failure, we wandered around this massive downtown sculpture, Spirit of Nebraska's Wilderness, which depicts travelers on the Oregon Trail. A sobering feeling washed over us, realizing their venture was far more treacherous than ours. Suddenly, we realized the old wall advertisement from earlier in the night was a perfect canvas. (A year later, that day's concept turned into the idea for my entire Adobe Creative Residency.) And on day nine, our plan was to camp in Yellowstone National Park and project off of something there. When we got close to the campsite, however, a huge storm had flooded the area, so we backtracked and ended up in the cute town of Sheridan, Wyoming, and stayed at a KOA campground. We thought it would be an uninspiring location, but we got a tent site with electricity, so we could avoid generator noise, and turned a rock into a digital campfire, and a tree into a dreamscape recalling heartbreak. It was one of our favorite overall projections, perfect for a drizzly night.”
“Up until this project, it was often hard for me to fully collaborate with someone else. I've worked on teams and initiated projects before where each person owned a part of a project, but on this one, Mike contributed to every level of narrative, design, and ideas as much as I did. We were fully entwined into one singular project. During the start of the trip, I felt like I had this edge of East Coast hustle and could stay up later and get more work done. Mike, who had been living in San Francisco for a few years, adopted a more laidback personality. When you're racing against the clock, that can become a point of stress. I was really trying to push him, but I didn't want to be harping on him. Plus, I preferred to drive most of the time, putting a lot of pressure on him to be productive during the drives. Halfway through our trip, this hit a peak: We got ambitious, Mike passed out, then I passed out, and we missed a day (see point #4). I realized it was all a give and take and, over the course of two weeks of non-stop making things, Mike's stamina-based approach helped us pace ourselves. The trip helped me learn to trust him and share the load.”
In the above video, Winslow describes the ideas behind his different Projecting West videos.
“While we were raising money on Kickstarter, we were offering higher level sponsorships for each day. There was a moment where a previous client of mine said they would be happy to be a sponsor, but only if we agree to a specific installation at their shop, at a certain time during the day. That would have felt very obviously sponsorship-y, especially for a crowd-funded project. Like, why are we doing this part of the story in a retail store? That's when we realized this was a chance to not have corporate sponsorships and retain full creative freedom. It was a defining moment to make sure this cross country trip was very worthwhile for us and our creative ambitions, and not a point of stress fulfilling sponsorship requests.”
“Usually after we decided on our locations, we averaged four hours of work until the installation was complete. However, on day seven, we we didn't get to the Badlands in South Dakota until the sun had set, so we were working in the dark. As I mentioned before, with no location limitations, our ideas and concepts that night became very general and complex we wanted to project on every single peak around us to create a parallel universe. The time got later and later and we still weren't finished. We decided to take a half hour nap around 3 a.m., and when we got up and tried to make more animations, we heard birds chirping. At this point on earlier days that went long, we'd be packing up our equipment, but we hadn't even driven to our location yet. We rushed off, unprepared, but it was too bright already. That was the worst feeling; we let our backers down. We had failed to do one projection every day. The more we reflected on the failure over the next day, however, we realized the thing we needed to do for the rest of the trip was to just have fun and not succumb to time pressure. If we fail, we fail — we shouldn't feel pressure not to fail. We adjusted our scope and efficiently busted out two installations the next night, catching ourselves up. And even better — we got to bed early.”
“On the road from one town to the next Mike and I would ‘real talk' a lot about where we were in life, our struggles and about our perspective moves out west, to inform the narrative of our project. Because we were racing against the clock, we often felt like we should be working during those drives, but we knew we couldn't push ourselves creatively 100 percent of the time because— well, you know how people get their best ideas in the shower or doing something else mundane? We needed that downtime to not think about or do anything. It was such a challenge for me as a perfectionist, to attempt one projection a day. Time itself became a large point of stress. If I were to do it again, I would abolished the whole “thing-a-day” sentiment and committed to a projection every other day a driving/scouting day, followed by a creating day. One installation a day was very ambitious, especially in the long days of summer.”
“By the time we got to Portland we wanted to have a grand finale and not unlike previous nights, we raced the sunrise to wrap up the narrative. Little Buddy and two characters that joined him along the way finish their journey but discover giant new monsters await them in Portland. But from their past struggles, they've gained the strength and courage for what new adventures lies ahead. Boom, what a story! Once we were done, the sun started to rise in my backyard, which has a heated, shared pool, so our reward was to jump in a steaming hot pool. Right as we dove in though, we rapidly learned that the heater broke the day before— and the water was freezing cold.”
“I've always had a knack for staying up all night— when I'm on a roll with something, I tend to stay up until 3 a.m or 4 a.m. especially if there are any impending deadlines, but Projecting West gave me some appreciation for figuring out how to find a better work / life balance. When I take on ambitious projects now where I wish certain working conditions or timelines could be better, I look back at Projecting West and remember what I accomplished under such challenging limitations. Beyond that, I've realized how important it is to be selective and aware of what I'm currently working on at any moment, and how it contributes to what I want to be doing in the future. Pursuing that weird self-initiated project that came from your gut is the best way to really discover what you want to be working toward in life.”
the five sports represented by the athletes include hurdles; discus; javelin; high jump; and long jump.
The post these animated athletes represent the olympic symbol's five rings appeared first on designboom | architecture & design magazine.
LOTHAR FISCHER (1933 - 2004).
two french designers have proposed a keyboard of emoticons that would allow people to communicate using pokémon characters.
The post pokémoji keyboard brings emoticon pokémon to your fingertips appeared first on designboom | architecture & design magazine.
Like Jack and Rose
A swarm of 10,000 or more black holes may be orbiting the Milky Way's supermassive black hole, according to observations from NASA's Chandra X-ray Observatory in 2015. This would represent the highest concentration of black holes anywhere in the Galaxy. These relatively small, stellar-mass black holes, along with neutron stars, appear to have migrated into the Galactic Center over the course of several billion years.
"The Center of our Milky Way Galaxy is a place of extremes," says Mark Morris, an expert on The Galactic Center at UCLA. "For every star in our nighttime sky, for example, there would be a million for someone looking up from a planet near the Galactic center."
The discovery was made as part of Chandra's ongoing program of monitoring the region around Sagittarius A* (Sgr A*), the supermassive black hole at the center of the Milky Way, reported by by Michael Muno of the University of California, Los Angeles (UCLA) at a 2015 meeting of the American Astronomical Society.
Among the thousands of X-ray sources detected within 70 light years of Sgr A*, Muno and his colleagues searched for those most likely to be active black holes and neutron stars by selecting only the brightest sources that also exhibited large variations in their X-ray output. These characteristics identify black holes and neutron stars that are in binary star systems and are pulling matter from nearby companion stars. Of the seven sources that met these criteria, four are within three light years of Sgr A*.
"Although the region around Sgr A* is crowded with stars, we expected that there was only a 20 percent chance that we would find even one X-ray binary within a three-light-year radius," said Muno. "The observed high concentration of these sources implies that a huge number of black holes and neutron stars have gathered in the center of the Galaxy."
Mark Morris, also of UCLA and a coauthor on the present work, had predicted a decade ago that a process called dynamical friction would cause stellar black holes to sink toward the center of the Galaxy. Black holes are formed as remnants of the explosions of massive stars and have masses of about 10 suns. As black holes orbit the center of the Galaxy at a distance of several light years, they pull on surrounding stars, which pull back on the black holes.
Among the thousands of X-ray sources detected within 70 light years of Sgr A*, Muno and his colleagues searched for those most likely to be active black holes and neutron stars by selecting only the brightest sources that also exhibited large variations in their X-ray output. "Although the region around Sgr A* is crowded with stars, we expected that there was only a 20 percent chance that we would find even one X-ray binary within a three-light-year radius," said Muno. "The observed high concentration of these sources implies that a huge number of black holes and neutron stars have gathered in the center of the Galaxy."
The images above are part of a Chandra program that monitors a region around the Milky Way's supermassive black hole, Sagittarius A* (Sgr A*). Four bright, variable X-ray sources (circles) were discovered within 3 light years of Sgr A* (the bright source just above Source C). The lower panel illustrates the strong variability of one of these sources. This variability, which is present in all the sources, is indicative of an X-ray binary system where a black hole or neutron star is pulling matter from a nearby companion star.
"Stars are packed quite close together in the center zone," says Morris. "Then, there's that supermassive black hole that is sitting in there, relatively quiet for now, but occasionally producing a dramatic outpouring of energy. The UCLA Galactic center group been use the Keck Telescopes in Hawaii to follow its activity for the last 17 years, watching not only the fluctuating emission from the black hole, but also watching the stars around it as they rapidly orbit the black hole."
Morris had predicted a decade ago that a process called dynamical friction would cause stellar black holes to sink toward the center of the Galaxy. Black holes are formed as remnants of the explosions of massive stars and have masses of about 10 suns. As black holes orbit the center of the Galaxy at a distance of several light years, they pull on surrounding stars, which pull back on the black holes. The net effect is that black holes spiral inward, and the low-mass stars move out. From the estimated number of stars and black holes in the Galactic Center region, dynamical friction is expected to produce a dense swarm of 20,000 black holes within three light years of Sgr A*. A similar effect is at work for neutron stars, but to a lesser extent because they have a lower mass.
Once black holes are concentrated near Sgr A*, they will have numerous close encounters with normal stars there, some of which are in binary star systems. The intense gravity of a black hole can induce an ordinary star to "change partners" and pair up with the black hole while ejecting its companion. This process and a similar one for neutron stars are expected to produce several hundreds of black hole and neutron star binary systems.
The black holes and neutron stars in the cluster are expected to gradually be swallowed by the supermassive black hole, Sgr A*, at a rate of about one every million years. At this rate, about 10,000 black holes and neutron stars would have been captured in a few billion years, adding about 3 percent to the mass of the central supermassive black hole, which is currently estimated to contain the mass of 3.7 million suns.
In the meantime, the acceleration of low-mass stars by black holes will eject low-mass stars from the central region. This expulsion will reduce the likelihood that normal stars will be captured by the central supermassive black hole. This may explain why the central regions of some galaxies, including the Milky Way, are fairly quiet even though they contain a supermassive black hole.
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The Daily Galaxy via chandra.harvard.edu
Image top of page: nustar.caltech.edu
UCLA astronomers have made the first accurate measurement of the abundance of oxygen in a distant galaxy. Oxygen, the third-most abundant chemical element in the universe, is created inside stars and released into interstellar gas when stars die. Quantifying the amount of oxygen is key to understanding how matter cycles in and out of galaxies.
This research is published online in the Astrophysical Journal Letters, and is based on data collected at the W. M. Keck Observatory on Mauna Kea, in Hawaii.
"This is by far the most distant galaxy for which the oxygen abundance has actually been measured," said Alice Shapley, a UCLA professor of astronomy, and co-author of the study. "We're looking back in time at this galaxy as it appeared 12 billion years ago."
Knowing the abundance of oxygen in the galaxy called COSMOS-1908 is an important stepping stone toward allowing astronomers to better understand the population of faint, distant galaxies observed when the universe was only a few billion years old and galaxy evolution, Shapley said.
COSMOS-1908 shown above, contains approximately 1 billion stars. In contrast, the Milky Way contains approximately 100 billion stars; some galaxies in the universe contain many more, while others contain many fewer. Furthermore, COSMOS-1908 contains approximately only 20 percent the abundance of oxygen that is observed in the sun.
Typically, astronomers rely on extremely indirect and imprecise techniques for estimating oxygen abundance for the vast majority of distant galaxies. But in this case, UCLA researchers used a direct measurement, said Ryan Sanders, astronomy graduate student and the study's lead author.
"Close galaxies are much brighter, and we have a very good method of determining the amount of oxygen in nearby galaxies," Sanders said. In faint, distant galaxies, the task is dramatically more difficult, but COSMOS-1908 was one case for which Sanders was able to apply the "robust" method commonly applied to nearby galaxies. "We hope this will be the first of many," he said.
Shapley said that prior to Sanders' discovery researchers didn't know if they could measure how much oxygen there was in these distant galaxies.
"Ryan's discovery shows we can measure the oxygen and compare these observations with models of how galaxies form and what their history of star formation is," Shapley said.
The amount of oxygen in a galaxy is determined primarily by three factors: how much oxygen comes from large stars that end their lives violently in supernova explosions -- a ubiquitous phenomenon in the early universe, when the rate of stellar births was dramatically higher than the rate in the universe today; how much of that oxygen gets ejected from the galaxy by so-called "super winds," which propel oxygen and other interstellar gases out of galaxies at hundreds of thousands of miles per hour; and how much pristine gas enters the galaxy from the intergalactic medium, which doesn't contain much oxygen.
"If we can measure how much oxygen is in a galaxy, it will tell us about all these processes," said Shapley, who, along with Sanders, is interested in learning how galaxies form and evolve, why galaxies have different structures, and how galaxies exchange material with their intergalactic environments.
Shapley expects the measurements of oxygen will reveal that super winds are very important in how galaxies evolved. "Measuring the oxygen content of galaxies over cosmic time is one of the key methods we have for understanding how galaxies grow, as well as how they spew out gas into the intergalactic medium," she said.
The researchers used an extremely advanced and sophisticated instrument called MOSFIRE (Multi-Object Spectrometer for Infra-Red Exploration) installed on the Keck I telescope at the Keck Observatory. This five-ton instrument was designed to study the most distant, faintest galaxies, said UCLA physics and astronomy professor Ian McLean, project leader on MOSFIRE and director of UCLA's Infrared Laboratory for Astrophysics. McLean built the instrument with colleagues from UCLA, the California Institute of Technology and UC Santa Cruz and industrial sub-contractors.
MOSFIRE collects visible-light photons from objects billions of light years away whose wavelengths have been stretched or "redshifted" to the infrared by the expansion of the universe. Due to the finite speed of light, MOSFIRE is providing a view of these galaxies as they existed billions of years ago, when the light first started traveling to Earth.
MOSFIRE is a type of instrument known as a "spectrograph," which spreads the light from astronomical objects out into a spectrum of separate wavelengths (colors), indicating the specific amount of energy emitted at each wavelength. Spectrographs enable astronomers to determine the chemical contents of galaxies, because different chemical elements -- such as oxygen, carbon, iron or hydrogen -- each provide a unique spectral fingerprint, emitting light at specific wavelengths.
To characterize the chemical contents of COSMOS-1908, Sanders analyzed a particular wavelength in the MOSFIRE spectrum of this galaxy that is sensitive to the amount of oxygen. "MOSFIRE made Ryan's measurement possible," said Shapley, who described it as an "amazing instrument."
The galaxy NGC 1291 shown at the top of the page is about 12 billion years. So what's it doing with a ring of newborn stars around it? In this newly released image from NASA's Spitzer Space Telescope, trapped gas at the galaxy's outskirts have triggered star birth.
The Daily Galaxy via UCLA
Is anybody out there? How would we know? And what happens if there is? In this episode of StarTalk All-Stars, host Carolyn Porco, a planetary scientist and imaging team leader for the Cassini mission at Saturn, and her guest Dan Werthimer, principal investigator of the Breakthrough Listen Initiative, answer Cosmic Queries about the search for ET, chosen by co-host Chuck Nice. You'll learn why Breakthrough Listen is the most comprehensive search for extraterrestrial intelligence ever, a new leap forward able to scan 10 times more of the sky and 5 times more of the radio spectrum, with 50 times greater sensitivity than any previous SETI project.
You'll hear about the search for life on the moons of exoplanets, as well as the possibility of microbial life here in our solar system. Explore the difficulties with the Drake Equation, which predicts the likelihood of intelligent alien civilizations, as well as the difficulties of designing instruments and spacecraft to detect life forms that could be quite different from us. Find out what a “second genesis” in our solar system could tell us about the chances for life in the rest of the universe.
Carolyn and Dan discuss the protocols that are in place for responding to an alien signal and ponder an even bigger question: who should speak for Earth if we do make contact? Finally, dive into one of the most controversial issues being debated today: should humanity be broadcasting our existence to the galaxy at large, or is that a recipe for disaster that could end up with humanity's enslavement…or worse?
Listening for Aliens Radio Program
europeanspaceagency posted a photo:
Candidate coatings for a new space antenna undergoing testing at ESA's technical heart in the Netherlands.
“Protective coatings safeguard antennas against temperature extremes or other environmental factors such as ultraviolet radiation,” explains antenna engineer Elena Saenz, performing the testing at ESA's technical centre in Noordwijk.
“Working with industry, we were asked to evaluate several candidate coatings for the coming MetOp microwave imager which sounds the atmosphere at various frequencies to gather data on rainfall, water vapour, temperature and clouds.
“The testing needs to measure the radio frequency behaviour of sample coatings across a very wide range of frequencies, from 18.7 GHz up to a maximum 191.3 GHz checking, for instance, that they do not cause unacceptable signal losses.”
Feed horns send out radio signals to be reflected across the table to the coating and back again, to assess performance.
Two of the candidates proved most promising to coat the carbon-fibre reinforced polymer honeycomb microwave imager antenna. ESA's antenna test facilities carry out around several of these kind of campaigns annually.
Higher frequencies were tested on the cleanroom tabletop system seen here, while testing for lower frequencies below 50 GHz was undertaken in ESA's Compact Antenna Test Range, normally used for antenna testing but adaptable for materials testing as well.
Credit: ESAG. Porter
Small carrion beetle (Catops sp.) collected near Inuvik, Northwest Territories, Canada, and photographed at the Centre for Biodiversity Genomics (sample ID: BIOUG23268-C06; specimen record: http://www.boldsystems.org/index.php/Public_RecordView?processid=GMOLH393-15; BIN: http://www.boldsystems.org/index.php/Public_BarcodeCluster?clusteruri=BOLD:ACX9198)
Casa Mirante by Brazilian firm FGMF
Experimental magazine BLAD explores modern urban growing
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Soviet poster for ANDROMEDA NEBULA (Yevgeni Sherstobitov, USSR, 1967)
Artist: Shulgin
Poster source: Posteritati