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   Advanced imaging of droplet drying Alerter l'administrateur Recommander à un ami Lien de l'article 

  SSY-based LCLCs are composed of organic, charged, plank-like molecules that organize in water into column-like mesogenic stacks. The internal structure of these rods depends on a combination of non-covalent electrostatic, excluded volume, hydrophobic, and π–π stacking interactions46,49. The mesogen assemblies, in turn, organize into nematic or columnar LC phases, depending on temperature and concentration. Under ambient equilibrium conditions, the isotropic—nematic transition occurs at about 28% by weight and the nematic—columnar transition occurs at about 36% by weight50. Thus SSY concentration affects two levels of organization: mesogen assembly and LC formation. SSY was purchased from Sigma-Aldrich with 90% purity and was further purified using a precipitation method51. SSY solutions of various weight concentrations were prepared with deionized water (ρ≥18 MΩ cm).

  The SSY droplets were pipetted from vials containing the various initial solution concentrations and were deposited onto clean glass slides or coverslips. Initial contact angles of the drops were observed to vary depending on the SSY concentration and the substrate surface. Generally, as seen in Supplementary Fig. 7, drops with comparatively high initial concentrations of SSY tended to have larger contact angles than lower concentration solutions. Evidently, SSY molecules and associated mesogens adsorbed to the air-water interface cause the surface tension to increase with respect to its bare value, with the largest SSY concentrations causing the largest surface tension increments. We confirmed the surface tension increases by the pendant drop method as reported in Supplementary Fig. 8. In addition, drops at 20% SSY by weight had larger contact angles on coverslips (∼51°) than on glass slides (∼20°).

  Droplet microscopy observations

  To connect the observations in the drying droplets to the SSY equilibrium phase diagram, experiments were conducted on an SSY sample at room temperature with a concentration gradient (see Supplementary Note 2). The order of appearance of the phases was the same for both the ‘equilibrium' and drying droplets experiments, and the appearance of the phases themselves was similar for both the ‘equilibrium’ and drying droplet experiment.

  Typical droplet volumes were 0.2–0.5 μl. Droplet evaporation was observed in both ambient and slow-drying conditions. The latter conditions were achieved by placing droplets in semi-permeable cross-linked polydimethylsiloxane (PDMS) chambers bonded to the substrate and sealed with a cover slip. Evaporation times correspondingly varied, that is, from minutes in ambient conditions to hours in the PDMS chambers. Videos of the evaporation process were captured by transmission optical microscopy with and without crossed polarizers. The use of POM readily permitted assignment of LC phase (for example, isotropic, nematic and columnar) and provided structural information (director configuration). Finally, the predominant orientation of the columns was readily determined by measuring polarized LED High Bay Light absorption near the absorption peak of isotropic SSY, λ=470 nm (±15 nm FWHM). SSY assemblies exhibit linear dichroism, and since their absorption is greatest for light polarized perpendicular to the liquid crystal director51, absorption anisotropy can be utilized to assign director orientation.


  Aucun commentaire | Ecrire un nouveau commentaire Posté le 08-06-2017 à 03h56

 The Public Service Commission Alerter l'administrateur Recommander à un ami Lien de l'article 

Two years ago, Gardner was struck by an encounter with a local man who worked remotely for Facebook. He told Gardner that big corporations were actually deciding where to expand based on where they could get renewable energy. "He made it seem like there was literally a list with a lot of states with big X's marked in," says Gardner, "so that Facebook and others were not looking because [some states] were not going to be open to renewables."
The Public Service Commission worried the state was missing out. It quietly issued an — "a clear signal to people outside of the state," says Gardner — that if a big customer wanted renewable energy, Kentucky's utilities could cut a special deal to provide it. That gave utilities permission to offer renewable energy. But they still face challenges to produce it. The state's cheap coal makes it harder for renewables to compete, and to see a return on investment. What's more, Kenya Stump, of the Energy and Environment Cabinet, says Kentucky has only , and not much at all for wind. She says hydro power holds the most promise. Stump is working with companies that want to develop renewable power, but she doesn't foresee a major spike anytime soon. "Right now renewables are starting to compete on costs, but not reliability," she says. But she adds that once battery technology develops and solar or wind power can be stored, "all bets are off." Kentucky's utilities are also highly regulated. An energy activist says he's been heartened by a shift in the state's attitude, but thinks officials could do a lot more to encourage renewables. "The sun in Kentucky is as strong as it is in North Carolina and Ohio and New York, where the solar industry is employing tens of thousands of people," says Andy McDonald of the Kentucky Solar Energy Society.
 "Kentucky is not limited by our resources; it's limited by our policies." None of those challenges is stopping a slow transition. "This tract is about 60 acres," says David Crews, standing in a freshly mowed field where East Kentucky Power Cooperative is about to install 32,000 solar panels. It will be one of the state's first utility-scale solar farms, and it's there by popular demand — from businesses. Crews says some companies don't mind paying a bit more to meet their sustainability LED Canopy Light  goals. East Kentucky Power has no plans to build another coal plant. Crews says just because the new president doesn't want to limit carbon emissions, doesn't mean the next one won't. "The seesawing of regulations when we're trying to make a 50-year investment, it will drive you crazy," he says. "And that wouldn't be good for our customer base." The utility is marketing its new solar farm, and if demand is strong enough Crews says it will add more panels. At Toyota's plant in central Kentucky, Kevin Butt envisions installing solar panels on the roof. The company is also researching fuel cell technology, seeking the breakthrough that could help it eliminate carbon emissions.
 But for now, he's getting creative about finding renewable energy where he can. He drives me down a rutted dirt road, through towering brown hills. It's a landfill, and here and there, things stick up. "The black tube coming out," he says pointing, "it's a methane capture well." The methane is released as the trash rots. When it goes into the air, methane is a dirty greenhouse gas, but last year Toyota set up a generator here to turn it into . The power is sent through an underground line, straight to the Toyota plant 6 miles away, bypassing the local utility altogether. "They either have to put it in their system," Butt says, "or people will be looking at alternate ways to get that energy in a renewable form."
Correction
A previous version of this story incorrectly said 90 percent of Kentucky's energy comes from coal. It's actually 90 percent of the state's electricity.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 12-06-2017 à 04h19

 Buckwheat Zydeco On Mountain Stage Alerter l'administrateur Recommander à un ami Lien de l'article 

 But I just felt very comfortable here and I was uncomfortable with city life. I didn't consider myself to be built for urban life. I was more or less a kid that came out of a small town and I was a beach bum and loved the ocean and loved the sun and I liked the people that were here. I liked who I was when I was here. I wanted to continue writing about the things that I felt were important, and those things were pretty much here. I felt it kept me in close contact with where I came from, which I was interested in doing. I felt like a lot of my heroes from the past lost themselves in different ways once they had a certain amount of success, and I was nervous about that and I wanted to remain grounded. And living in this part of New Jersey LED Bulbs was something that was essential to who I was and continues to this day to be that way.  So we've been recording this interview in your home studio. Would you just tell us a little bit about the studio? I mean, it was built for you. Patti built this studio. She, with some help. This was just part of our garage. Yes, because I'm looking through a curtain, the curtain's closed now, but when it was open, there was a big vintage car or truck or motorcycle. Yeah, there's a lot of motorcycles over there. Most studios don't have a garage attached to it like that. We're surrounded by vintage automobiles and motorcycles. But this piece of the garage, Patti said, "Well let's make a studio out of it," because we were using the house across the street to record in for a long time. And I said, "Okay, go ahead, see what it's about," and she just did an incredible job building this facility here. But it's like, if I had died when I was 15 and went to heaven, this is where I think I would have ended up. We're surrounded by guitars, keyboards, recording decks. It's just a paradise. Bruce Springsteen, I can't thank you enough for inviting us into your studio and allowing us to do this interview. Thank you so much. Thank you so much, very enjoyable. And I really loved the book. Thanks a lot. 

  Buckwheat Zydeco On Mountain Stage Buckwheat Zydeco. In this encore edition of Mountain Stage, we revisit performance from 2006, featuring songs from his album Jackpot. For decades now, Buckwheat Zydeco has remained the most popular zydeco act on the live circuit. Not surprisingly, he has appeared on Mountain Stage seven times. A journeyman who cut his teeth as a guitarist with Clifton Chenier before becoming his natural successor, Stanley "Buckwheat" Dural Jr. puts his Louisiana spin on everything from original bayou and funk to roadhouse rock, complete with touches of synthesizer and trumpet. The first zydeco act ever signed to a major label, the band has earned countless appearances alongside artists such as , , and . Buckwheat Zydeco's most recent album, Lay Your Burden Down, features covers of tunes by , , and Captain Beefheart.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 13-06-2017 à 04h09

 Christopher Paul Stelling Explains His New Album Alerter l'administrateur Recommander à un ami Lien de l'article 

  Christopher Paul Stelling Explains His New Album 'Itinerant Arias,' Track By Track Itinerant Arias by Christopher Paul Stelling The first time I saw Christopher Paul Stelling his face was red and his eyes were wide, singing as if he were about to burst apart, as if he had so much to tell us and too little time, as if his mind was racing faster than his tongue could keep up with. He's a singer with the spirit of Woody Guthrie both deep within and showing on his sleeve. Stelling has a new collection of songs he has titled Itinerant Arias, which he says "sounds a lot better than 'travelin' songs,'" but that's exactly what they are. Songs which have in common no single origin, or sense of place. Like found objects, overheard stories, lost melodies.
 And so today, to mark the release of Itinerant Arias, we thought we'd let this man of words take you on a tour of his new record, track by track. "We begin at rock bottom, when all the layers of self-pity are peeled away and all we have left to do is remind LED Down Light ourselves that it can always get better from here. We are not destitute, even if we are going to meet our maker, because life in some form will go on. It's a song about depression and its antidote, about putting one foot in front of the other, about looking up. I think it's cheerful. A nice place to start." "I wrote this in a hotel room in Oostende, Belgium, a seaside town that prides itself for having provided refuge for a road-tired and drugged-out Marvin Gaye. I had just flown in on a red-eye for a festival, on no sleep and after driving straight there from Amsterdam. The hotel room was a six-floor walkup, no elevator. I passed out, only to be shaken awake by the promoter to get me to the gig. When i got back, the bones of the song were scrawled into my notebook. It's about that Faustian riddle — and you can dance to it." "This song was written for a painting; Hugo Simberg's 'Finnish Elegy.' A museum in Groningen, in the northern Netherlands, was asking artists to write songs inspired by paintings for an exhibit. It was through my connection with the museum that I was able to book my first show in Europe in 2014, but the song never received a proper studio recording until now. The painting shows a somber man, head down at sunset, standing over a canoe at the river bank.
To me it looked as though he were about to cast off into the night." "I woke up on a floor in the Bywater neighborhood of New Orleans without any idea how I'd gotten there — and with a splitting headache. There were teeth in the street outside in a perfect, bloody little pool. I was alone in a friend's house. I had a pack of matches in my pocket advertising a retirement home that had scrolled across the bottom: 'For A Day or A Lifetime.' After that, the three scenes wrote themselves — the three white teeth, the parade of young soldiers, the two dusty lonesome books on the shelf." "I became aware of the Syrian refugee crisis firsthand a couple years ago when crossing the English Channel from Calais to Dover. Seeing the camps, driving right past them; kind-eyed folks looking out at me from behind the fences, desperate to find a home, and me able to pass through cause I had the right passport, was the right nationality. It made me feel ill. "The next year, when making the same crossing, it had gotten worse; razorwire and plywood shanty towns. It was pouring rain, and we ran into the building where we'd be playing a small house concert that night.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 14-06-2017 à 07h43

 He actually never said what he thought Alerter l'administrateur Recommander à un ami Lien de l'article 

 He said, well, he actually confirmed the facts of the story, but then said the premise of the story was false. I'd gone through the same situation with McMaster where I'd written a story about McMaster in Iraq in 2006 that put his unit in a very good LED Flood Light and him in a very good light about the work they had done in taking a new approach in fighting the war. But there was one paragraph in it he disliked. He didn't dispute the truth of it. He just disliked it, and so he called me and yelled at me for two days over the phone in Iraq to complain about it. And I heard that exact same tone when he got up at the White House and called the story false.

He actually never said what he thought the wrong facts were, but he basically was saying I don't like that story. GROSS: Well, you wrote a column about this, and what he didn't like about the article you wrote is that you criticized his unit for what it did before he took it over. So you weren't criticizing him at all, but I - sounded to me like he didn't like the idea of you criticizing, you know, the military. He didn't want to break rank with that. RICKS: That's exactly right. He specifically wanted to defend his unit, his regiment and protect the morale of troops who he thought might be demoralized by seeing the previous tour of duty that they had criticized. I... GROSS: And you think that's what he's doing now is trying to kind of protect the president or protect the morale of the administration. RICKS: Yes. And I think he failed to see that his job is not to protect the president. It's to protect the nation. And what I fear General McMaster has done in recent weeks by coming out and seeking to protect the president is not his job. He shouldn't protect the president. He should protect the nation. And I fear that through his recent actions, he has enabled President Trump to continue to operate in this very reckless, ignorant way. Now, I think what McMaster thinks he's doing is the best he can do in that situation.

What I fear he doesn't see is he's enabling it to become worse. GROSS: So you've written that you don't think that McMaster will dutifully defend President Trump for long. Why do you think that? RICKS: It's a crushing burden to be in political power in Washington these days, and you see people almost lose their souls. I think Sean Spicer, the president's spokesman in recent weeks has been pushed almost to the edge of a nervous breakdown from his public appearance. And he's kind of lost a big part of his soul, and I think that's true of some other people. And H.R. McMaster is a man of great soul, of great feeling. I remember talking to him in Iraq, and his voice would grow thick. And when he was kind of angry a little bit, he'd rolled his shoulders as he talked to you, almost as if to loosen up those back muscles. And watching H.R. McMaster, an officer I do admire, over the last few weeks, I feel like I've seen him come out and give up a slice of his soul a few times.

And I wonder how many more times he can do that before he just says I am becoming part of the problem, not part of the solution here. GROSS: My guest is Tom Ricks, a former Pentagon correspondent for The Washington Post who now writes the blog The Best Defense for Foreign Policy magazine. His new book is called "Churchill And Orwell: The Fight For Freedom." After a break, he'll tell us how he helped make General Michael Flynn famous. Flynn is now most famous for being forced out of the Trump administration after 24 days. I'm Terry Gross, and this is FRESH AIR.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 15-06-2017 à 03h36


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