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The world may be complicated and full of problems — but the 37 teams of students in this year's MIT IDEAS Global Challenge each envisioned a way to make it better.
Now in its 11th year, the IDEAS Global Challenge recognized 13 of those teams at its annual awards celebration — "the Oscars of social impact at MIT," in the words of Alison Hynd, one of the award presenters — on Thursday evening in the Stata Center. Teams were awarded a total of $72,500 in juried awards, with individual awards ranging from $5,000 to $10,000.
Bridging gaps
Three other teams whose projects won the most online votes — Samanvai Green Products, SMART Coops and IndianRaga — received Community Choice Awards of $1,500. Upon receiving awards, team members stepped to the podium to give brief overviews of their projects.
MIT junior Srikanth Bolla won funding for Samanvai Green Products, a company that would employ some of the 50 million people in India with multiple disabilities. Born visually challenged, Bolla knows firsthand how hard it is to overcome the stigmas and lack of training resources for disabled people. "I was one of the victims, but I could break all the barriers and reach MIT," he said. "There are millions of people who lack this opportunity."
SMART Coops and IndianRaga each won Community Choice Awards for their plans to connect people with resources they need. SMART Coops aims to link farmers with banks using a mobile app, hoping that if both sides have more information, banks can help farmers succeed by offering them lower interest rates. IndianRaga seeks to fill the role that royal patronage once played for Indian musicians, using technology to connect young musicians with potential new audiences.
Medical care for the developing world
As advancing technology in the developed world opens more and more possibilities for medical care, many people elsewhere remain unable to access and afford the devices and treatments that have emerged. Three of the IDEAS Global Challenge winners developed low-cost technologies for use in the developing world.
Wi-Care's Wound-Pump — used to promote wound healing by applying a vacuum to increase blood flow — has already been tested in Haiti, receiving positive feedback from patients as well as caregivers, mechanical engineering graduate student Danielle Zurovcik said. Her team's plastic accordion-folded cylinder aims to replace a large, expensive, cumbersome machine now in use.
For the 30 million people in the developing world who lack one or more limbs, the BETH Project designed an adjustable prosthetic socket to replace current prosthetics that must be custom-fitted to each user, a process that is often prohibitively expensive.
A team called Otto Clave came up with and distributed a sensor- and monitor-equipped autoclave for rural health practitioners. The team hopes to develop and deploy a text-messaging system to track the usage of their product and catch any problems that users have.
Managing urban waste
Two teams received funding through this year's Muhammad Yunus Innovation Challenge to Alleviate Poverty, the theme of which was "Waste: Put it to Use."
"Urban waste is a huge problem because there are very few ways to handle it effectively," said biological engineering graduate student Kevin Kung, one of the members of Takachar, a team that plans to produce charcoal from household organic waste. "Our innovation is to make carbonization possible for urban waste."
The other Yunus Challenge winner, wecyclers, developed a text-message-based platform that rewards residents of urban slums for delivering recyclables to a network of kiosks — awarding points redeemable for goods such as clean drinking water or cellphone minutes. The team's "crowd-sourced recycling" model tackles an environmental and health hazard created by accumulated waste in slums, said team member Alex Fallon, a graduate student at the MIT Sloan School of Management.
Disaster relief
Two teams won IDEAS funding for proposals aimed at disaster relief.
After a tornado hit their Massachusetts home in June 2011, sisters Morgan and Caitria O'Neill — an MIT graduate student in atmospheric physics and a recent Harvard College graduate, respectively — founded recovers.org, a web-based platform for disaster organization that includes software for collecting donations and connecting aid organizers in different areas. They saw firsthand the "serious endemic problems to disaster relief," Morgan O'Neill said, realizing, "There are really easy technologies we can apply to this."
Another IDEAS-winning team, OpenIR, proposed a web application whose user-friendly infrared data can provide information on water depth, oil spread and fault lines to help in responding to a variety of disasters.
A new age of innovation
"There is a gap in the global supply chain," said Jackie Stenson, a Harvard alumna who co-founded Essmart with MIT graduate student Diana Jue '09, MCP '12. Low-cost, life-improving technologies like water filters and solar lanterns are great, but only if they are available to the people that need them; when Essmart tried a novel distribution model in southern India, the two retail shops they worked with sold out of their products in a week.
Other IDEAS-winning teams included:
- inSight, which developed an electronic retina imager that attaches to a pair of glasses and allows early diagnosis of diabetic retinopathy, the leading cause of blindness in the United States
- Fula&Style, which developed loosely stitched predesigned and precut business clothing that could be quickly tailored to customers
While the projects addressed a wide range of problems, all are innovative and — like all infant ventures — risky. But, as opening speaker Joi Ito, director of the MIT Media Lab, urged IDEAS participants, "The cost of innovation has gone down so much that instead of trying to minimize risk, just try it. Just do it."


text: Sullen Clothing: 21 Questions with Myke Chambers Courtesy of Sullen Clothing: A few days ago I did our popular 21 questions with one of the coolest down to earth guys Myke Chambers. Myke is a part of our elite Sullen Art Collective team that consists of some of the best artists. This was a fun interview to do because Myke is so into Sullen and helping out us out. Sullen just launched a new tee design called the Myke Chambers which is his first artist collaboration piece. Myke is a huge fan of Traditional Americana imagery with tons of color and bold lines which is something we are a huge fan of as well, there are so many great black and grey artists, but when someone comes to us with awesome color work we are all over it... [Interview and pictures on expanded page] Sullen: What's up Myke how's everything going? Myke Chambers: Everything's actually pretty damn awesome! Just when I thought my life couldn't get any better it does! S: How long have you been tattooing? MC: Hmmm, around 16 years I guess. S: What's the reason you love tattooing? MC: Wow…that's a tough one. There's a lot of reasons I love tattooing. For one, I get to create my art on someone else's body. That's almost sacred in itself. I get to leave a part of myself with that person for the rest of their life. I guess most people might take that for granted or maybe it wouldn't matter so much if I was just doing a job and copying an image into someones skin…but i'm not. My tattoos may look simple but I put everything I have into every tattoo I do. S: Where are you from? MC: Hard to say. I was born in Panama City FL then moved to LA when I was 5 after my parents split. I guess if I was to claim something it would be between Long Beach CA and Austin TX. I'm now based in Philly PA when I'm not on the road. S: Did anyone influence you to start tattooing? MC: Yup….Mike Ness S: Do you compare your style to anyone? MC: No, I really try to do my own thing aside from using a lot of classic Americana imagery. I may get a little influence here and there but for the most part I want my work to stand apart from everyone else's. Every now and then I notice other people may be picking up on stuff I do so I change it. I'm constantly trying to learn, get better and evolve….not emulate. I want people to see my stuff and know it's mine. S: What kind of music do you like? I used to be all about hardcore punk but these days i'm pretty open to whatever sounds good at the time. Tho' for the last few years i've been all about Lucero. S: Black and Grey or Color which do you prefer? Color for sure. I do love a good black and grey tattoo though. S: Is there one thing that inspires you before you start working like music or anything? MC: Coffee. S: Your favorite place to eat? MC: Changes daily. Usually Mexican S: Favorite drink? MC: Coffee! Ha-ha-ha! S: What's the most memorable tattoo you have done? MC: I tattooed my Dad before he passed. S: How did your relationship with Sullen come about? MC: I was hanging out with Eva Huber when Ryan contacted her to do a shirt for the Sullen Angels and she mentioned to him I'd be interested in working with Sullen also. Thanks Eva! You guys made a good choice picking up Eva. She's a really good artist. I see big things for her. S: What's your favorite item from Sullen? MC: There's a lot of the clothing I really like and wear on a daily basis but I'd have to say the Blaq Paq Bag!! I take that thing everywhere! S: If you weren't tattooing what would you be doing? MC: Probably a therapist working with troubled youth. I mean I did go to college for it. I spend a lot of my free time speaking at juvenile detention centers and rehabs across the US. S: You are currently tattooing out of Art Machine Productions in Philadelphia PA, explain how that is going? MC: It's going really well. I work with Tim Pangburn, one of the best cover-up artists I've ever seen. The whole time I've been there it's been a completely private, appointment only studio but Tim decided to open it up to the public and move it to a street level shop in Philadelphia's hip/artsy Fishtown neighborhood. S: What's a hidden talent of yours? MC: Hmmm. Well I love to write. I've been working on a book about my life. Not a lot of people know that. Or how about my amazing talent of hiding the fact that I'm a huge nerd spending most of my nights reading about knights and wizards until 5- 6 a.m. almost every night. S: Anything on the horizon for you, any projects you want to let your fans know about? MC: My new Sullen shirt just came out!!!! Buy it! And yeah, there's a ton of stuff going on..just follow my FB "artist page" and twitter to find out! S: Best place you have traveled to? MC: The top of the Great Smoky Mountains in the fall…in the rain. S: Worst place you have traveled to? MC: The bottom of a bottle S: Anyone you wanna give shout outs to this is your time… MC: Really right now I just want to thank Ryan and the whole Sullen Crew for having me. The Collective is pretty amazing. Thanks Guys! (Myke can be found on the road and at Art Machine Productions in Philadelphia, PA. This post was orginally seen at the Sullen Blog. Visit Sullen's Blog for more info and stories: http://www.sullenclothing.com/Sullen-Blog.)

subset: commoncrawl


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Event organizers say a large LED screen being set up for the Ultra Music Festival collapsed in downtown Miami, injuring several people.
Fire rescue workers responded to Bayfront Park Thursday evening and took victims to a nearby trauma center. An event spokeswoman says that the accident occurred during preparations for the festival. It wasn't immediately clear how badly the workers were hurt. The event spokeswoman confirmed that two workers were injured, but other media outlets, quoting fire rescue officials, were reporting up to three or four people injured.
The annual outdoor electronic music festival is set to begin Friday and run over two weekends. Among those scheduled to perform are David Guetta, Swedish House Mafia, Deadmau5, Avicii and Snoop Lion, who was formerly known as Snoop Dogg.


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New gun charges have been filed against the Baltimore blogger who broadcast his standoff with police online via live radio as they tried to arrest him on an outstanding warrant last week, according to court records and police.
Police said they found an unregistered sawed-off shotgun in his home.
Frank James MacArthur, 47, a cab driver and prolific social media user who has branded himself as a citizen-journalist and city watchdog through Twitter posts and online radio broadcasts under the name Baltimore Spectator, peacefully turned himself over to police outside his home in the 600 block of McKewin Avenue about 11 p.m. Saturday.
Police, and a SWAT team, were at his home to serve two warrants. Court records show a warrant was issued by his probation agent stemming from a 2009 gun case and another for subsequent failure to appear in court. Police said the SWAT team's presence was a precaution after MacArthur allegedly made threatening comments online.
The standoff lasted more than five hours and involved MacArthur's broadcasting his conversation with a police negotiator over the Internet, to thousands of listeners. The standoff garnered international attention, largely because of the compelling storyline of a live police negotiation gone viral.
Police searched MacArthur's home after he turned himself in, and allegedly found the weapon in an upstairs bedroom. Police previously said they had recommended charges be filed because MacArthur has a previous gun conviction from 2002 that disqualified him from having a firearm.
MacArthur has been charged with illegal possession of a firearm and with having an unregistered shotgun, records show.
He remained in custody late Tuesday, according to court records.
Latest Crime


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Rodney Reed's Execution Approaches In Texas | All In | MSNBC
- published: 13 Nov 2019
- views: 10723
Chris Hayes looks at the case of Rodney Reed, who was originally scheduled for execution in 2015, and is now once again scheduled to be put to death. Aired on 11/12/19. » Subscribe to MSNBC: http://on.msnbc.com/SubscribeTomsnbc MSNBC delivers breaking news, in-depth analysis of politics headlines, as well as commentary and informed perspectives. Find video clips and segments from The Rachel Maddow Show, Morning Joe, Meet the Press Daily, The Beat with Ari Melber, Deadline: White House with Nicolle Wallace, Hardball, All In, Last Word, 11th Hour, and more. Connect with MSNBC Online Visit msnbc.com: http://on.msnbc.com/Readmsnbc Subscribe to MSNBC Newsletter: http://MSNBC.com/NewslettersYouTube Find MSNBC on Facebook: http://on.msnbc.com/Likemsnbc Follow MSNBC on Twitter: http://on.msnbc.com/Followmsnbc Follow MSNBC on Instagram: http://on.msnbc.com/Instamsnbc Rodney Reed\'s Execution Approaches In Texas | All In | MSNBC...


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For information online, our knee walker comparison chart shows all the differences between each product. If you are a fan of the phone, our mobility team is very well educated on each knee walker and can help you make the best decision possible. Please call us at 1(800) 893-1264.
Yes. Two of the three models we carry turn / steer. We have the Drive non-steerable knee walker as well. We found that some people wanted the simplest product possible.
Yes, all three of the knee walkers we carry do fold up to become considerably smaller and easier to transport.
Yes, all three of our knee walkers work on carpet.
We are an out of network provider with insurance carriers. Every insurance plan is different, so it's important to get information from your carrier to find out if your knee walker will be covered.
If your insurance carrier provides out of network benefits you can request reimbursement by submitting the following 3 documents…
For more information please see our in depth article on insurance reimbursement, or give us a call at 1(800) 893-1264.
If you're unhappy with your knee walker within the first 7 days you receive it, let us know and we'll send you a completely free exchange. Once you receive your new unit, you must drop the older unit off at your nearest FedEx facility within 3 business days. If you would like us to arrange a FedEx pickup of the knee walker at your home, we will pass on the approximate $13 fee that FedEx charges us for the service.
You can cancel your knee walker rental by notifying us within 4-days of the date of arrival for a refund after the cost of delivery and return shipping. The unit must be scanned into FedEx's system within 2-days of your notification. If you would like a FedEx pickup at your home, please call us so we can schedule it for you for a $13 fee, which is approximately what FedEx charges us for this service.
Never! We trust you.
Your rental start date should be the day you would like to receive your knee walker. Since we never charge for transit time, your rental starts the day it arrives. To see the expected date that your knee walker will be delivered based on your location, please take a look at the How Fast Can i Get It? page. If you're pre-ordering we will set aside your rental and make sure it's delivered on time.
You have the option to rent your knee walker for as much time as you like, but we only cover shipping, handling and other costs associated with your knee walker rental when it's reserved for at least 4 weeks. Usually people find it's more cost effective to rent for 4 weeks and have us cover knee walker delivery, rather than rent for less time and pay for the costs associated with a shipment themselves. If you would like your knee walker for less than 1 month, please call us at 1(800) 893-1264 for more details.
Yes! Extending your knee walker rental is seamless. Our monthly rental rates add up to less than our weekly and daily rates, and we make sure that you are billed the lowest possible price that you are entitled to. We have an auto billing system that accounts for this by charging your card for extra rental time on a monthly basis if your knee walker has not been shipped back sooner.
Please note we are a rent to own company. This means that if your knee walker rental adds up to the retail price we charge for a unit, we will stop billing you, and send you an email to let you know that we've switched your original rental into a purchase.
No, a prescription is not required to rent a knee walker, although we recommend asking for your doctor for one so you can submit to your insurance company for reimbursement.
Get it in 1-3 days, shipments and deliveries are Monday through Friday.
You can simply give us a call at 1(800) 893-1264 and we will look it up for you.
Place your knee walker in the box you received it in, and attach the included shipping label on the outside of the box. Drop it off at your closest FedEx location, or call us to request a pickup at your home or office. We pass along the $13 fee that FedEx charges us for their pickup service. Please note that you are responsible for the cost of return shipping. You can send the knee walker back using the pre-printed FedEx label in your package, or with any shipping carrier you desire. If you ship without the label we include, you must place your order ID as a reference # on the label. You will also need to provide tracking information on the package in case it is lost or damaged. When you use the FedEx label that we have included for you, the significant savings we receive from FedEx will be passed on to you, and it is not necessary to worry about order ID placement or tracking information. Once the unit is received, we will charge the cost of return shipping to the credit card we have on file.
Shipping time is never included with your rental. Your rental period starts the day your knee walker is received and ends the day that your knee walker is in FedEx's possession. To ensure accuracy, we check tracking numbers and make sure you are never charged for time that your knee scooter is in transit.
If renting, you will be responsible for the cost of return shipping back to our nearest facility. For your convenience we include a FedEx return label with your rental packet, and if used, the deep discounts we receive from FedEx will be passed on to you at the end of your rental.
Absolutely. You can either upgrade before completing your knee walker rental on our secure site, or by calling us to place an order. Since extra charges apply for faster shipping services, we pass this cost along to you.
No, we do not ship outside the continental United States.
Monday-Friday 8am - 8pm Eastern time.
Saturday-Sunday 10AM - 2PM Eastern time.
Monday-Friday 8am - 8pm Eastern time.
Saturday-Sunday 10AM - 2PM Eastern time.


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CHICAGO -- A Bally Total Fitness membership that had been signed by a developmentally disabled person in Indianapolis has been terminated, a Bally public relations official said today.
The family of Mark Hannon told Indianapolis TV station WRTV that two men representing a local Bally club went to the apartment of Hannon, whom the family says is developmentally disabled, and offered him a membership, even though the apartment complex in which Hannon lives has a policy against solicitation. The two men also allegedly drove Hannon to the club to sign the contract, which the family claims Hannon could not understand.
Hannon, 49, paid $69.98 for the first and last month of the contract—in addition to a services fee—and agreed to have $29.99 withdrawn from his bank account every month, according to the TV station.
"They knew he was developmentally challenged, and it did not bother them one bit," Joe Hannon, Mark's brother, told the TV station.The Bally official could not confirm the details of the transaction.


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50 Years of Guts & Glory
The Angola Rodeo, the longest running prison rodeo in the nation, got its start in 1965. The first arena was small, built by a handful of dedicated inmates and personnel. It wasn't much in those days, and the rodeo was stages just for the entertainment of prisoners and employees. But it was fun.
The 1967 rodeo was opened to the general public on a limited basis. There were no stands. Spectators had to sit on apple crates and the hoods of their cars to watch the performance.
The success on the 1967 and 1968 rodeos prompted constructions of a 4,500 seat arena for the 1969 rodeo. A near disaster occurred when the bleachers collapsed during one of the shows. Spectators weren't alarmed, most didn't even get up. They sat on the collapsed structure and continued to watch. The 1971 rodeo was the wettest in history, but the show went on.
As years passed, the rodeo grew in size, adding events and sponsorships. The official Professional Rodeo Cowboys Association rules were adopted in 1972 and the rodeo became a permanent fixture. The Angola spring Prison Rodeo is back Saturday, April 26 and Sunday, April 27, 2014.
In 1997, spectator capacity was expanded by 1000 seats and construction of a roof over the seating area began to provide increased comfort for spectators under Louisiana's blazing sun. Hobbycraft space was also expanded to the point where it is no longer just a little concession area on the side for some inmate organizations to make a few bucks. It is now an all day, full blown arts and crafts festival, complete with entertainment and food galore. The arts and crafts festival begins at 9 a.m. and continues throughout the rodeo which begins at 2 p.m. each Sunday in October. Many fans come to the rodeo for the arts and crafts show alone.
What began 40 years ago as a "fun" thing by a handful of rodeo loving inmates and employees is now big business. Proceeds from the Angola Prison Rodeo cover rodeo expenses and supplement the Louisiana State Penitentiary Inmate Welfare Fund which provides for inmate educational and recreational supplies.
There is widespread recognition today about the Angola Prison Rodeo which was formally established in 1964.
To clearly define goals and objectives of the Angola Prison Rodeo, the 2003 Angola Prison Rodeo Committee created a Charter, and amended it in March 2006. This Charter demonstrates the Angola Prison Rodeo Committee's commitment to stewardship of any proceeds derived from the productions of the Angola Prison Rodeo.
It is assumed that the rodeo was initially established to provide a source of recreation for the inmate populations as well as to provide a source of entertainment for employees of the Louisiana State Penitentiary and the immediate surrounding community. Eventually, the Angola Prison was expanded to include spectators from the general public.
Recognizing the potential for the growth of this unique event, since the 1995 rodeo season the Angola Prison Rodeo Committee has strived to provide a professional rodeo production which would prove beneficial to the internal inmate economy, but would also be beneficial to the Parish of West Feliciana tourism industry. Soliciting help and cooperation form the inmate populations provided an important mechanism to protect and improve the quality of the Angola Prison Rodeo, both economically and environmentally.
The objective of the Angola Prison Rodeo remains to provide the prison population at Louisiana State Penitentiary with an opportunity for positive behavior changes.
- Grand Entry-Angola Rough Riders enter the arena at full gallop and colors are presented.
- Bust out-All six chutes open simultaneously, releasing 6 angry bulls, with temporarily attached inmate cowboys. The last man to remain on the bull wins the event.
- Bareback Riding-Riders are expected to keep one hand in the air, and must stay on the horse for 8 seconds to qualify.
- Wild Horse Race-Six wild horses are simultaneously released into the arena with short ropes dragging behind them. Three-man teams attempt to grab the ropes and hold the horse long enough for a team member to mount. The first team to cross the finish line while still on top of the horse is the winner.
- Barrel Racing-This is the only event in which inmates do not participate. It is a tour stop for The Girl's Rodeo Association.
- Bull-Dogging-The animal is placed in a chute, with two cowboys positioned just outside the chute. Their job is to wrestle the animal to the ground as quickly as possible.
- Buddy Pick-Up-This event requires one man on a horse (riding bareback) to navigate the length of the arena, pick up another inmate who is standing on a barrel, and race back to the finish line.
- Wild Cow Milking-Teams of inmate cowboys chase the animals around the arena trying to extract a little milk. The first team to bring milk to the judge win the prize.
- Bull Riding-This dangerous and wide open event is what the fans come to see. Inexperienced inmate sit on top of a 2,000 pound Brahma bull. To be eligible for the coveted "All-Around Cowboy" title, a contestant must successfully complete the ride (6 seconds). The Professional Rodeo Cowboys Association's rules govern this event.
- Convict Poker-Four inmate cowboys sit at a table in the middle of the arena playing a friendly game of poker. Suddenly, a wild bull is released with the sole purpose of unseating the poker players. The last man remaining seated is the winner.
- Guts & Glory-A chit (poker chip) is tied to the meanest, toughest Brahma bull available. The object is to get close enough to the bull in order to snatch the chit. This is the last event of the day, and perhaps the most exciting.


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Nearly 45,000 deaths a year in the U.S. are associated with lack of health insurance, up from a previous estimate of about 18,000 a year, according to a new study by researchers at Harvard Medical School and the Cambridge Health Alliance.
That ranges from a low of 60 deaths a year in Vermont, where more than 15 percent of people are uninsured, to 4,675 deaths a year in Texas, where nearly 30 percent lack insurance.
Overall, uninsured, working-age Americans have a 40 percent higher risk of death than people with private insurance, up from a 25 percent excess death risk rate found in 2002, said Dr. Andrew Wilper, lead author of a study posted in the American Journal of Public Health.
"The uninsured have a higher risk of death when compared to the privately insured, even after taking into account socioeconomics, health behaviors and baseline health," Wilper said in a statement.
U.S. & World
Researchers analyzed data from national surveys from the Centers for Disease Control and Prevention. They looked at adults under age 65 who participated in the annual National Health and Nutrition Examination Surveys between 1986 and 1994. CDC tracked participants to see who died by 2000.
They estimated that lack of insurance causes 44,789 deaths a year. That was far higher than a similar study in 2002 by the Institute of Medicine, which found nearly 18,000 deaths linked to lack of insurance.


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Striker FLEXiT Hands-free, Flexible Task Light
Description: Striker is proud to introduce one of the most unique innovative task lights ever created—the FLEXiT. Imagine having a light you could bend like a sheet of paper to focus or spread light all around. It is a light that is able to wrap around tubes, bend into tight corners, and magnetically fasten securely to metal objects. The FLEXiT Light is a hands-free, flexible LED task light. It's ultra-thin, flexible silicone body allows an unlimited amount of light projections. The durable Shape-Loc frame makes it easy for users to bend, fold, wrap, stick or hook the FLEXiT around objects to position and aim the light. FLEXiT uses 16 Lumen Tech LEDs with three light functions (low, med, and high), and it can be bent into positions to create a focused spot or a broad flood light. The durable ABS base holds 3 AA batteries (included), the electronic switch and circuit, two large neodymium (rare-earth) magnets, and a loop to hang or mount the light. The FLEXiT is 0.85" thick, 7" wide, and 13" tall.
Price: $28.99 to $30.99


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Norm Zocher's Electric Strings Quartet
Please see the full events listing for upcoming events.
Guitarist and composer Norm Zocher brings his exciting genre-bending Electric Strings Quartet to the Berklee Performance Center. This concert, which draws from the classical and rock traditions, is the latest in a series of collaborations with Berklee faculty violinist Mimi Rabson. The program will feature excerpts from Zocher's composition "Rock Ethic" for solo violin, which was commissioned by Rabson with a Berklee grant. It premiered in New York City by former Metropolitan Opera Orchestra concertmaster Elmira Darvarova, and was featured in Strings magazine. The concert will also include Zocher's orchestral work, "Slow and Heavy," which was played by the Berklee World Strings under Rabson's baton. Along with Zocher on guitars and Rabson on violin, the Electric Strings Quartet features Berklee professor Bruno Raberg on bass, and Dave Jamrog on drums.
Can't make the concert? Watch it live on Concert Window!


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A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 36.1 fb(-1) from proton-proton collisions at root s = 13 TeV recorded in 2015 and 2016 by the ATLAS detector at the Large Hadron Collider. The search considers the Z boson decaying to electrons or muons and the H boson into a pair of b-quarks. No evidence for the production of an A boson is found. Considering each production process separately, the 95% confidence-level upper limits on the pp -> A -> ZH production cross-section times the branching ratio H -> bb are in the range of 14-830 fb for the gluon-gluon fusion process and 26-570 fb for the b-associated process for the mass ranges 130-700 GeV of the H boson and 230-800 GeV of the A boson. The results are interpreted in the context of two-Higgs-doublet models.
A search for supersymmetric partners of top quarks decaying as (t) over tilde (1) -> c (chi) over tilde (0)(1)and supersymmetric partners of charm quarks decaying as (c) over tilde (1) -> c (chi) over tilde (0 )(1)where (chi) over tilde (0)(1) is the lightest neutralino, is presented. The search uses 36.1 fb(-1) pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider and is performed in final states with jets identified as containing charm hadrons. Assuming a 100% branching ratio to c (chi) over tilde (0)(1), top and charm squarks with masses up to 850 GeV are excluded at 95% confidence level for a massless lightest neutralino. For m (t) over tilde (1,(c) over tilde1) - m((chi) over tilde 10)< 100 GeV, top and charm squark masses up to 500 GeV are excluded.
Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are presented using integrated luminosities of 0.49 nb(-1) of Pb + Pb collision data at root(NN)-N-s = 5.02 TeV and 25 pb(-1) of pp collision data at. root s= 5.02 TeV recorded with the ATLAS detector at the LHC. Photons with transverse momentum 63.1 < p(T)(gamma) < 200 GeV and vertical bar eta(gamma vertical bar) < 2.37 are paired with all jets in the event that have p(T)(jet) > 31.6 GeV and pseudorapidity vertical bar eta(Jet)vertical bar < 2.8. The transverse momentum balance given by the jet-to-photon p(T) ratio, x(j gamma), is measured for pairs with azimuthal opening angle Delta phi > 7 pi/8. Distributions of the per-photon jet yield as a function of x(j gamma), (1/N-gamma)(dN/dx(j gamma)), are corrected for detector effects via a two-dimensional unfolding procedure and reported at the particle level. In pp collisions, the distributions are well described by Monte Carlo event generators. In Pb + Pb collisions, the x(j gamma) distribution is modified from that observed in pp collisions with increasing centrality, consistent with the picture of parton energy loss in the hot nuclear medium. The data are compared with a suite of energy-loss models and calculations. (C) 2018 The Author(s). Published by Elsevier B.V.
Higgs boson production cross-sections in proton-proton collisions are measured in the H -> WW*-> e nu mu nu decay channel. The proton-proton collision data were produced at the Large Hadron Collider at a centre-of-mass energy of 13 TeV and recorded by the ATLAS detector in 2015 and 2016, corresponding to an integrated luminosity of 36.1 fb(-1). The product of the H -> WW* branching fraction times the gluon-gluon fusion and vector-boson fusion cross-sections are measured to be 11.4(-1.1)(+1.2)(stat.)(-1.7)(+1.8)(syst.) pb and 0.50(-0.22)(+0.24)(stat.) +/- 0.17(syst.) pb, respectively, in agreement with Standard Model predictions. (C) 2019 The Author. Published by Elsevier B.V.
A measurement of the production of a prompt J/psi meson in association with a W-+/- boson with W-+/- -> mu nu and J/psi -> mu(+)mu(-) is presented for J/psi transverse momenta in the range 8.5-150 GeV and rapidity |y(J/psi)| < 2.1 using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton-proton centre-of-mass energy of s = 8 TeV and correspond to an integrated luminosity of 20.3 fb(-1). The ratio of the prompt J/psi plus W-+/- cross-section to the inclusive W-+/- cross-section is presented as a differential measurement as a function of J/psi transverse momenta and compared with theoretical predictions using different double-parton-scattering cross-sections.
This paper presents a measurement of ZZ production with the ATLAS detector at the Large Hadron Collider. The measurement is carried out in the final state with two charged leptons and two neutrinos, using data collected during 2015 and 2016 in pp collisions at root s = 13 TeV, corresponding to an integrated luminosity of 36.1 fb(-1). The integrated cross-sections in the total and fiducial phase spaces are measured with an uncertainty of 7% and compared with Standard Model predictions, and differential measurements in the fiducial phase space are reported. No significant deviations from the Standard Model predictions are observed, and stringent constraints are placed on anomalous couplings corresponding to neutral triple gauge-boson interactions.
A search for a narrow scalar resonance decaying into an opposite-sign muon pair produced in events with and without b-tagged jets is presented in this paper. The search uses 36.1 fb(-1) of =13 TeV proton-proton collision data recorded by the ATLAS experiment at the LHC. No significant excess of events above the expected Standard Model background is observed in the investigated mass range of 0.2 to 1.0 TeV. The observed upper limits at 95% confidence level on the cross section times branching ratio for b-quark associated production and gluon-gluon fusion are between 1.9 and 41 fb and 1.6 and 44 fb respectively, which is consistent with expectations.
Limits are set on the pair production of scalar leptoquarks, where all possible decays of the leptoquark into a quark (t, b) and a lepton (, ) of the third generation are considered. The limits are presented as a function of the leptoquark mass and the branching ratio into charged leptons for up-type (LQ<sub ) and down-type (/t) leptoquarks. Many results are reinterpretations of previously published ATLAS searches. In all cases, LHC proton-proton collision data at a centre-of-mass energy of = 13 TeV recorded by the ATLAS detector in 2015 and 2016 are used, corresponding to an integrated luminosity of 36.1 fb(-1). Masses below 800 GeV are excluded for both LQu and LQd independently of the branching ratio, with masses below about 1 TeV being excluded for the limiting cases of branching ratios equal to zero or unity.
This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb(-1) at = 7 TeV and 12.2 to 20.3 fb(-1) at = 8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5 +/- 5.7 pb and 87.7 +/- 5.8 pb at = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 +/- 4.1 pb and 23.1 +/- 3.6 pb at = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 +/- 1.4 pb at = 8 TeV. The square of the magnitude of the CKM matrix element V-tb multiplied by a form factor f(LV) is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation |V-td|, |V-ts| << |V-tb|. All the |f(LV)V(tb)|(2) determinations, extracted from individual ratios at = 7 and 8 TeV, are combined, resulting in |f(LV)V(tb)| = 1.02 +/- 0.04 (meas.) +/- 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.
Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H -> invisible decays where H is produced according to the standard model via vector boson fusion, Z(ll)H, and W/Z(had)H, all performed with the ATLAS detector using 36.1 fb(-1) of pp collisions at a center-of-mass energy of root s = 13 TeV at the LHC. In combination with the results at root s = 7 and 8 TeV, an exclusion limit on the H -> invisible branching ratio of 0.26(0.17(-0.05)(+0.07)) at 95% confidence level is observed (expected).
Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to 37 fb(-1) = 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this paper. The results of experimental searches in a variety of final states are interpreted in terms of a set of spin-1 and spin-0 single-mediator dark matter simplified models and a second set of models involving an extended Higgs sector plus an additional vector or pseudo-scalar mediator. The searches considered in this paper constrain spin-1 leptophobic and leptophilic mediators, spin-0 colour-neutral and colour-charged mediators and vector or pseudo-scalar mediators embedded in extended Higgs sector models. In this case, also = 8 TeV pp collision data are used for the interpretation of the results. The results are also interpreted for the first time in terms of light scalar particles that could contribute to the accelerating expansion of the universe (dark energy).
This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25 pb(-1) of pp data and 360 mu b(-1) of p + Pb data, both at root S-NN = 5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p + Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p + Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets.
A measurement of the Higgs boson production cross sections via associated WH and ZH production using H -> WW* -> l nu l nu decays, where l stands for either an electron or a muon, is presented. Results for combined WH and ZH production are also presented. The analysis uses events produced in proton-proton collisions collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The data correspond to an integrated luminosity of 36.1 fb(-1) recorded at a centre-of-mass energy of 13 TeV. The products of the H -> WW* branching fraction times the WH and ZH cross sections are measured to be 0.67(-0.27)(+0.31)(stat.)(-0.14)(+0.18)(syst.) pb and 0.54(-0.24)(+0.31)(stat.)(-0.07)(+0.15)(syst.) pb respectively, in agreement with the Standard Model predictions.
The ratio of the cross sections for inclusive isolated-photon production in pp collisions at centre-of-mass energies of 13 and 8 TeV is measured using the ATLAS detector at the LHC. The integrated luminosities of the 13 TeV and 8 TeV datasets are 3.2 fb(-1) and 20.2 fb(-1), respectively. The ratio is measured as a function of the photon transverse energy in different regions of the photon pseudorapidity. The predictions from next-to-leading-order perturbative QCD calculations are compared with the measured ratio. The experimental systematic uncertainties as well as the uncertainties affecting the predictions are evaluated taking into account the correlations between the two centre-of-mass energies, resulting in a reduction of up to a factor of 2.5 (5) in the experimental (theoretical) systematic uncertainties. The predictions based on several parameterisations of the proton parton distribution functions agree with the data within the reduced experimental and theoretical uncertainties. In addition, this ratio to that of the fiducial cross sections for Z boson production at 13 and 8 TeV using the decay channels Z e(+)e(-) and Z (+-) is made and compared with the theoretical predictions. In this double ratio, a further reduction of the experimental uncertainty is obtained because the uncertainties arising from the luminosity measurement cancel out. The predictions describe the measurements of the double ratio within the theoretical and experimental uncertainties.
Cross-sections of associated production of a Higgs boson decaying into bottomquark pairs and an electroweak gauge boson, W or Z, decaying into leptons are measured as a function of the gauge boson transverse momentum. The measurements are performed in kinematic fiducial volumes defined in the simplified template cross-section' framework. The results are obtained using 79.8 fb(-1) of proton-proton collisions recorded by the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. All measurements are found to be in agreement with the Standard Model predictions, and limits are set on the parameters of an effective Lagrangian sensitive to modifications of the Higgs boson couplings to the electroweak gauge bosons.
Silicon pixel detectors are at the core of the current and planned upgrade of the ATLAS experiment at the LHC. Given their close proximity to the interaction point, these detectors will be exposed to an unprecedented amount of radiation over their lifetime. The current pixel detector will receive damage from non-ionizing radiation in excess of 10(15) 1 MeV n(eq)/cm(2), while the pixel detector designed for the high-luminosity LHC must cope with an order of magnitude larger fluence. This paper presents a digitization model incorporating effects of radiation damage to the pixel sensors. The model is described in detail and predictions for the charge collection efficiency and Lorentz angle are compared with collision data collected between 2015 and 2017 (<= 10(15) 1 MeV n(eq)/cm(2)).
A search for a right-handed gauge boson W-R, decaying into a boosted right-handed heavy neutrino N-R, in the framework of Left-Right Symmetric Models is presented. It is based on data from proton-proton collisions with a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider during the years 2015, 2016 and 2017, corresponding to an integrated luminosity of 80 fb(-1). The search is performed separately for electrons and muons in the final state. A distinguishing feature of the search is the use of large-radius jets containing electrons. Selections based on the signal topology result in smaller background compared to the expected signal. No significant deviation from the Standard Model prediction is observed and lower limits are set in the W-R and N-R mass plane. Mass values of the W-R smaller than 3.8-5 TeV are excluded for N-R in the mass range 0.1-1.8 TeV.
A search is conducted for the electroweak pair production of a chargino and a neutralino pp -> (chi) over tilde (+/-)(1)(chi) over tilde (0)(2), where the chargino decays into the lightest neutralino and a W boson, (chi) over tilde (+/-)(1) -> (chi) over tilde W-0(1)+/- while the neutralino decays into the lightest neutralino and a Standard Model-like 125 GeV Higgs boson,(chi) over tilde (0)(2) -> (chi) over tilde (0)(1)h. Fully hadronic, semileptonic, diphoton, and multilepton (electrons, muons) final. states with missing transverse momentum are considered in this search. Higgs bosons in the final state are identified by either two jets originating from bottom quarks (h -> b (b) over bar), two photons (h -> gamma gamma), or leptons from the decay modes h -> WW, h -> ZZ or h -> tau tau. The analysis is based on 36.1 fb(-1) of s root s = 13 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider. Observations are consistent with the Standard Model expectations, and 95% confidence-level limits of up to 680 GeV in (chi) over tilde (+/-)(1)/(chi) over tilde (0)(2) mass are set in the context of a simplified supersymmetric model.
A search is performed for localised excesses in dijet mass distributions of low-dijet-mass events produced in association with a high transverse energy photon. The search uses up to 79.8 fb(-1) of LHC proton-proton collisions collected by the ATLAS experiment at a centre-of-mass energy of 13 TeV during 2015-2017. Two variants are presented: one which makes no jet flavour requirements and one which requires both jets to be tagged as b-jets. The observed mass distributions are consistent with multi-jet processes in the Standard Model. The data are used to set upper limits on the production cross-section for a benchmark Z' model and, separately, on generic Gaussian-shape contributions to the mass distributions, extending the current ATLAS constraints on dijet resonances to the mass range between 225 and 1100 GeV.
A measurement of jet substructure observables is presented using data collected in 2016 by the ATLAS experiment at the LHC with proton-proton collisions at root s= 13 TeV. Large-radius jets groomed with the trimming and soft-drop algorithms are studied. Dedicated event selections are used to study jets produced by light quarks or gluons, and hadronically decaying top quarks and W bosons. The observables measured are sensitive to substructure, and therefore are typically used for tagging large-radius jets from boosted massive particles. These include the energy correlation functions and the N-subjettiness variables. The number of subjets and the Les Houches angularity are also considered. The distributions of the substructure variables, corrected for detector effects, are compared to the predictions of various Monte Carlo event generators. They are also compared between the large-radius jets originating from light quarks or gluons, and hadronically decaying top quarks and W bosons.
Multi-particle azimuthal cumulants are measured as a function of centrality and transverse momentum using 470 mu b(-1) of Pb+Pb collisions at root s(NN) = 5.02TeV with the ATLAS detector at the LHC. These cumulants provide information on the event-by-event fluctuations of harmonic flow coefficients v(n) and correlated fluctuations between two harmonics v(n) and v(m). For the first time, a non-zero four-particle cumulant is observed for dipolar flow, v(1). The four-particle cumulants for elliptic flow, v(2), and triangular flow, v(3), exhibit a strong centrality dependence and change sign in ultra-central collisions. This sign change is consistent with significant non-Gaussian fluctuations in v(2) and v(3). The four-particle cumulant for quadrangular flow, v(4), is found to change sign in mid-central collisions. Correlations between two harmonics are studied with three- and four-particle mixed-harmonic cumulants, which indicate an anti-correlation between v(2) and v(3), and a positive correlation between v(2) and v(4). These correlations decrease in strength towards central collisions and either approach zero or change sign in ultra-central collisions. To investigate the possible flow fluctuations arising from intrinsic centrality or volume fluctuations, the results are compared between two different event classes used for centrality definitions. In peripheral and mid-central collisions where the cumulant signals are large, only small differences are observed. In ultra-central collisions, the differences are much larger and transverse momentum dependent. These results provide new information to disentangle flow fluctuations from the initial and final states, as well as new insights on the influence of centrality fluctuations.
The azimuthal anisotropy of charged particles produced in sNN=8.16TeV p+Pb collisions is measured with the ATLAS detector at the LHC. The data correspond to an integrated luminosity of 165 nb-1 that was collected in 2016. Azimuthal anisotropy coefficients, elliptic v2 and triangular v3\, extracted using two-particle correlations with a non-flow template fit procedure, are presented as a function of particle transverse momentum (pT) between 0.5 and 50 GeV. The v2 results are also reported as a function of centrality in three different particle pTintervals. The results are reported from minimum-bias events and jet-triggered events, where two jet pT thresholds are used. The anisotropies for particles with pT less than about 2 GeV are consistent with hydrodynamic flow expectations, while the significant non-zero anisotropies for pT in the range 9-50 GeV are not explained within current theoretical frameworks. In the pTrange 2-9 GeV, the anisotropies are larger in minimum-bias than in jet-triggered events. Possible origins of these effects, such as the changing admixture of particles from hard scattering and the underlying event, are discussed.
The efficiency of the photon identification criteria in the ATLAS detector is measured using 36.1 fb1 to 36.7 fb1 of pp collision data at v s = 13 TeV collected in 2015 and 2016. The efficiencies are measured separately for converted and unconverted isolated photons, in four different pseudorapidity regions, for transverse momenta between 10 GeV and 1.5 TeV. The results from the combination of three data-driven techniques are compared with the predictions from simulation after correcting the variables describing the shape of electromagnetic showers in simulation for the average differences observed relative to data. Data-tosimulation efficiency ratios are determined to account for the small residual efficiency differences. These factors are measured with uncertainties between 0.5% and 5% depending on the photon transverse momentum and pseudorapidity. The impact of the isolation criteria on the photon identification efficiency, and that of additional soft pp interactions, are also discussed. The probability of reconstructing an electron as a photon candidate ismeasured in data, and compared with the predictions from simulation. The efficiency of the reconstruction of photon conversions is measured using a sample of photon candidates from Z. mu mu. events, exploiting the properties of the ratio of the energies deposited in the first and second longitudinal layers of the ATLAS electromagnetic calorimeter.
A search for a pair of neutral, scalar bosons with each decaying into two W bosons is presented using 36.1 fb(-1) of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. This search uses three production models: non-resonant and resonant Higgs boson pair production and resonant production of a pair of heavy scalar particles. Three final states, classified by the number of leptons, are analysed: two same-sign leptons, three leptons, and four leptons. No significant excess over the expected Standard Model backgrounds is observed. An observed (expected) 95% confidence-level upper limit of 160 (120) times the Standard Model prediction of non-resonant Higgs boson pair production cross-section is set from a combined analysis of the three final states. Upper limits are set on the production cross-section times branching ratio of a heavy scalar X decaying into a Higgs boson pair in the mass range of 260 GeV m(X) 500 GeV and the observed (expected) limits range from 9.3 (10) pb to 2.8 (2.6) pb. Upper limits are set on the production cross-section times branching ratio of a heavy scalar X decaying into a pair of heavy scalars S for mass ranges of 280 GeV m(X) 340 GeV and 135 GeV m(S) 165 GeV and the observed (expected) limits range from 2.5 (2.5) pb to 0.16 (0.17) pb.
A search for flavour-changing neutral current decays of a top quark into an up-type quark (q = u, c) and the Standard Model Higgs boson, t Hq, is presented. The search is based on a dataset of pp collisions at = 13 TeV recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 36.1 fb(-1). Two complementary analyses are performed to search for top-quark pair events in which one top quark decays into Wb and the other top quark decays into Hq, and target the Hbb and H (+-) decay modes, respectively. The high multiplicity of b-quark jets, or the presence of hadronically decaying -leptons, is exploited in the two analyses respectively. Multivariate techniques are used to separate the signal from the background, which is dominated by top-quark pair production. No significant excess of events above the background expectation is found, and 95% CL upper limits on the t Hq branching ratios are derived. The combination of these searches with ATLAS searches in diphoton and multilepton final states yields observed (expected) 95% CL upper limits on the t Hc and t Hu branching ratios of 1.1 x 10(-3) (8.3 x 10(-4)) and 1.2 x 10(-3) (8.3 x 10(-4)), respectively. The corresponding combined observed (expected) upper limits on the |(tcH)| and |(tuH)| couplings are 0.064 (0.055) and 0.066 (0.055), respectively.
A search for new particles decaying into a pair of top quarks is performed using proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at a center-of-mass energy of root s = 13 TeV corresponding to an integrated luminosity of 36.1 fb(-1). Events consistent with top-quark pair production and the fully hadronic decay mode of the top quarks are selected by requiring multiple high transverse momentum jets including those containing b-hadrons. Two analysis techniques, exploiting dedicated top-quark pair reconstruction in different kinematic regimes, are used to optimize the search sensitivity to new hypothetical particles over a wide mass range. The invariant mass distribution of the two reconstructed top-quark candidates is examined for resonant production of new particles with various spins and decay widths. No significant deviation from the Standard Model prediction is observed and limits are set on the production cross-section times branching fraction for new hypothetical Z' bosons, dark-matter mediators, Kaluza-Klein gravitons and Kaluza-Klein gluons. By comparing with the predicted production cross sections, the Z' boson in the topcolor-assisted-technicolor model is excluded for masses up to 3.1-3.6 TeV, the dark-matter mediators in a simplified framework are excluded in the mass ranges from 0.8 to 0.9 TeV and from 2.0 to 2.2 TeV, and the Kaluza-Klein gluon is excluded for masses up to 3.4 TeV, depending on the decay widths of the particles.
A search for four-top-quark production, t (t) over bart (t) over bar, is presented. It is based on proton-proton collision data with a center-of-mass energy root s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider during the years 2015 and 2016, corresponding to an integrated luminosity of 36.1 fb(-1). Data are analyzed in both the single-lepton and opposite-sign dilepton channels, characterized by the presence of one or two isolated electrons or muons with high-transverse momentum and multiple jets. A data-driven method is used to estimate the dominant background from top-quark pair production in association with jets. No significant excess above the Standard Model expectation is observed. The result is combined with the previous same-sign dilepton and multilepton searches carried out by the ATLAS Collaboration and an observed (expected) upper limit of 5.3 (2.1) times the four-top-quark Standard Model cross section is obtained at 95% confidence level. Additionally, an upper limit on the anomalous four-top-quark production cross section is set in the context of an effective field theory model.
Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb(-1) of pp and 0.49 nb(-1) of Pb + Pb collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The measurements are compared to predictions of Monte Carlo generators and to measurements of inclusively selected jets. In pp collisions, a different jet fragmentation function in photon-tagged events from that in inclusive jet events arises from the difference in fragmentation between light quarks and gluons. The ratios of the fragmentation functions in Pb + Pb events to that in pp events are used to explore the parton color-charge dependence of jet quenching in the hot medium. In relatively peripheral collisions, fragmentation functions exhibit a similar modification pattern for photon-tagged and inclusive jets. However, photon-tagged jets are observed to have larger modifications than inclusive jets in central Pb + Pb events.
This Letter presents a measurement of gamma gamma -> mu(+)mu(-)- production in Pb + Pb collisions recorded by the ATLAS detector at the Large Hadron Collider at root s(NN) = 5.02 TeV with an integrated luminosity of 0.49 nb(-1). The azimuthal angle and transverse momentum correlations between the muons are measured as a function of collision centrality. The muon pairs are produced from gamma gamma through the interaction of the large electromagnetic fields of the nuclei. The contribution from background sources of muon pairs is removed using a template fit method. In peripheral collisions, the muons exhibit a strong back-to-back correlation consistent with previous measurements of muon pair production in ultraperipheral collisions. The angular correlations are observed to broaden significantly in central collisions. The modifications arc qualitatively consistent with rescattering of the muons while passing through the hot matter produced in the collision.
A search for charged Higgs bosons heavier than the top quark and decaying via H-+/- tb is presented. The data analysed corresponds to 36.1 fb(-1) of pp collisions at TeV and was recorded with the ATLAS detector at the LHC in 2015 and 2016. The production of a charged Higgs boson in association with a top quark and a bottom quark, pp tbH(+/-), is explored in the mass range from m(H)+/- = 200 to 2000 GeV using multi-jet final states with one or two electrons or muons. Events are categorised according to the multiplicity of jets and how likely these are to have originated from hadronisation of a bottom quark. Multivariate techniques are used to discriminate between signal and background events. No significant excess above the background-only hypothesis is observed and exclusion limits are derived for the production cross-section times branching ratio of a charged Higgs boson as a function of its mass, which range from 2.9 pb at m(H)+/- = 200 GeV to 0.070 pb at m(H)+/- = 2000 GeV. The results are interpreted in two benchmark scenarios of the Minimal Supersymmetric Standard Model.
A search for Higgs boson pair production in the bb‾WW* decay mode is performed in the bb‾lvqq final state using 36.1 fb-1 of proton-proton collision data at a centre-of-mass energy of 13TeV recorded with the ATLAS detector at the Large Hadron Collider. No evidence of events beyond the background expectation is found. Upper limits on the non-resonant pp → HH production cross section of 10 pb and on the resonant production cross section as a function of the HH invariant mass are obtained. Resonant production limits are set for scalar and spin-2 graviton hypotheses in the mass range 500 to 3000 GeV.
A search is performed for a long-lived particle decaying into a final state that includes a pair of muons of opposite-sign electric charge, using proton-proton collision data collected at √s = 13 TeV by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 32.9 fb-1. No significant excess over the Standard Model expectation is observed. Limits at 95% confidence level on the lifetime of the long-lived particle are presented in models of new phenomena including gauge-mediated supersymmetry or decay of the Higgs boson, H, to a pair of dark photons, ZD. Lifetimes in the range cτ = 1-2400 cm are excluded, depending on the parameters of the model. In the supersymmetric model, the lightest neutralino is the next-to-lightest supersymmetric particle, with a relatively long lifetime due to its weak coupling to the gravitino, the lightest supersymmetric particle. The lifetime limits are determined for very light gravitino mass and various assumptions for the neutralino mass in the range 300-1000 GeV. In the dark photon model, the lifetime limits are interpreted as exclusion contours in the plane of the coupling between the ZD and the Standard Model Z boson versus the ZD mass (in the range 20-60 GeV), for various assumptions for the H -> ZDZD branching fraction.
A search for supersymmetry in events with large missing transverse momentum, jets, and at least one hadronically decaying tau-lepton is presented. Two exclusive final states with either exactly one or at least two tau-leptons are considered. The analysis is based on proton-proton collisions at root s = 13 TeV corresponding to an integrated luminosity of 36.1 fb(-1) delivered by the Large Hadron Collider and recorded by the ATLAS detector in 2015 and 2016. No significant excess is observed over the Standard Model expectation. At 95% confidence level, model-independent upper limits on the cross section are set and exclusion limits are provided for two signal scenarios: a simplified model of gluino pair production with tau-rich cascade decays, and a model with gauge-mediated supersymmetry breaking (GMSB). In the simplified model, gluino masses up to 2000 GeV are excluded for low values of the mass of the lightest supersymmetric particle (LSP), while LSP masses up to 1000 GeV are excluded for gluino masses around 1400 GeV. In the GMSB model, values of the supersymmetry-breaking scale are excluded below 110 TeV for all values of tan beta in the range 2 <= tan beta <= 60, and below 120 TeV for tan beta > 30.
A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T -> Zt/Wb/Ht, B -> Zb/Wt/Hb) is performed using 36.1 fb(-1) of pp collision data at root s = 13 TeV with the ATLAS detector at the Large Hadron Collider. The observed data are found to be in good agreement with the standard model background prediction in all individual searches. Therefore, combined 95% confidence-level upper limits are set on the production cross section for a range of vectorlike quark scenarios, significantly improving upon the reach of the individual searches. Model-independent limits are set assuming the vectorlike quarks decay to standard model particles. A singlet T is excluded for masses below 1.31 TeV and a singlet B is excluded for masses below 1.22 TeV. Assuming a weak isospin (T, B) doublet and vertical bar V-Tb vertical bar << vertical bar V-tB vertical bar, T and B masses below 1.37 TeV are excluded.
Results of dedicated Monte Carlo simulations of beam-induced background (BIB) in the ATLAS experiment at the Large Hadron Collider (LHC) are presented and compared with data recorded in 2012. During normal physics operation this background arises mainly from scattering of the 4 TeV protons on residual gas in the beam pipe. Methods of reconstructing the BIB signals in the ATLAS detector, developed and implemented in the simulation chain based on the FLUKA Monte Carlo simulation package, are described. The interaction rates are determined from the residual gas pressure distribution in the LHC ring in order to set an absolute scale on the predicted rates of BIB so that they can be compared quantitatively with data. Through these comparisons the origins of the BIB leading to different observables in the ATLAS detectors are analysed. The level of agreement between simulation results and BIB measurements by ATLAS in 2012 demonstrates that a good understanding of the origin of BIB has been reached.
A measurement of production cross sections of the Higgs boson in proton-proton collisions is presented in the H → τ τ decay channel. The analysis is performed using 36.1 fb-1 of data recorded by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy of √s = 13 TeV. All combinations of leptonic (τ → l v v‾ with l = e, μ) and hadronic (τ→ hadrons v) τ decays arc considered. The H → τ τ signal over the expected background from other Standard Model processes is established with an observed (expected) significance of 4.4 (4.1) standard deviations. Combined with results obtained using data taken at 7 and 8 TeV center-of-mass energies, the observed (expected) significance amounts to 6.4 (5.4) standard deviations and constitutes an observation of H → τ τ decays. Using the data taken at √s = 13 TeV, the total cross section in the H → τ τ decay channel is measured to be 3.77+0.60-0.59(stat)+0.87-0.74 (syst) pb, for a Higgs boson of mass 125 GeV assuming the relative contributions of its production modes as predicted by the Standard Model. Total cross sections in the H → τ τ decay channel are determined separately for vector-boson-fusion production and gluon-gluon-fusion production to be σVBFH → τ τ = 0.28 ± 0.09 (stat)+0.11-0.09 (syst) pb and σggFH → τ τ = 3.1 ± 1.0 (stat)+1.6-1.3 (syst) pb, respectively. Similarly, results of a fit are reported in the framework of simplified template cross sections. All measurements are in agreement with Standard Model expectations.
Measurements of the azimuthal anisotropy in lead-lead collisions at v s NN = 5.02 TeV are presented using a data sample corresponding to 0.49 nb -1 integrated luminosity collected by the ATLAS experiment at the LHC in 2015. The recorded minimum-bias sample is enhanced by triggers for " ultra-central" collisions, providing an opportunity to perform detailed study of flow harmonics in the regime where the initial state is dominated by fluctuations. The anisotropy of the charged-particle azimuthal angle distributions is characterized by the Fourier coefficients, v2-v7, which are measured using the two-particle correlation, scalar-product and event-plane methods. The goal of the paper is to provide measurements of the differential as well as integrated flow harmonics vn over wide ranges of the transverse momentum, 0.5 < pT < 60 GeV, the pseudorapidity, |.| < 2.5, and the collision centrality 0-80%. Results from different methods are compared and discussed in the context of previous and recent measurements in Pb+ Pb collisions at v s NN = 2.76TeV and 5.02TeV. In particular, the shape of the pT dependence of elliptic or triangular flow harmonics is observed to be very similar at different centralities after scaling the vn and pT values by constant factors over the centrality interval 0-60% and the pT range 0.5 < pT < 5 GeV.
ATLAS measurements of the production of muons from heavy-flavor decays in root s(NN) = 2.76 TeV Pb+Pb collisions and root s = 2.76 TeV pp collisions at the LHC are presented. Integrated luminosities of 0.14 nb(-1) and 570 nb(-1) are used for the Pb+Pb and pp measurements, respectively, which are performed over the muon transverse momentum range 4 < pT < 14 GeV and for five Pb+Pb centrality intervals. Backgrounds arising from in-flight pion and kaon decays, hadronic showers, and misreconstructed muons are statistically removed using a template-fitting procedure. The heavy-flavor muon differential cross sections and per-event yields are measured in pp and Pb+Pb collisions, respectively. The nuclear modification factor R-AA obtained from these is observed to be independent of pT, within uncertainties, and to be less than unity, which indicates suppressed production of heavy-flavor muons in Pb+Pb collisions. For the 10% most central Pb+Pb events, the measured R-AA is approximately 0.35. The azimuthal modulation of the heavy-flavor muon yields is also measured and the associated Fourier coefficients v(n) for n = 2, 3, and 4 are given as a function of pT and centrality. They vary slowly with pT and show a systematic variation with centrality which is characteristic of other anisotropy measurements, such as that observed for inclusive hadrons. The measured R-AA and v(n) values are also compared with theoretical calculations.
A determination of the top-quark mass is presented using 20.2 fb-1 of 8 TeV proton-proton collision data produced by the Large Hadron Collider and collected by the ATLAS experiment. The normalised differential cross section of top-quark pair production in association with an energetic jet is measured in the lepton+jets final state and unfolded to parton and particle levels. The unfolded distribution at parton level can be described using next-to-leading-order QCD predictions in terms of either the top-quark pole mass or the running mass as defined in the (modified) minimal subtraction scheme. A comparison between the experimental distribution and the theoretical prediction allows the top-quark mass to be extracted in the two schemes. The value obtained for the pole-mass scheme is: rnirle 171.1 0.4 (stat) 0.9 (syst) 173 (theo) GeV. The extracted value in the running-mass scheme is: rnt(rnt) = 162.9 0.5 (stat) 1.0 (syst) 1:12 (theo) GeV. The results for the top -quark mass using the two schemes are consistent, when translated from one scheme to the other.
The performance of identification algorithms (taggers) for hadronically decaying top quarks and W bosons in pp collisions at = 13TeV recorded by the ATLAS experiment at the Large Hadron Collider is presented. A set of techniques based on jet shape observables are studied to determine a set of optimal cut-based taggers for use in physics analyses. The studies are extended to assess the utility of combinations of substructure observables as a multivariate tagger using boosted decision trees or deep neural networks in comparison with taggers based on two-variable combinations. In addition, for highly boosted top-quark tagging, a deep neural network based on jet constituent inputs as well as a re-optimisation of the shower deconstruction technique is presented. The performance of these taggers is studied in data collected during 2015 and 2016 corresponding to 36.1fb-1 for the tt and +jet and 36.7-1 for the dijet event topologies.
A search for electroweak production of supersymmetric particles is performed in two-lepton and three-lepton final states using recursive jigsaw reconstruction, a technique that assigns reconstructed objects to the most probable hemispheres of the decay trees, allowing one to construct tailored kinematic variables to separate the signal and background. The search uses data collected in 2015 and 2016 by the ATLAS experiment in root s = 13 TeV proton-proton collisions at the CERN Large Hadron Collider corresponding to an integrated luminosity of 36.1 fb(-1). Chargino-neutralino pair production, with decays via W/Z bosons, is studied in final states involving leptons and jets and missing transverse momentum for scenarios with large and intermediate mass splittings between the parent particle and lightest supersymmetric particle, as well as for the scenario where this mass splitting is close to the mass of the Z boson. The latter case is challenging since the vector bosons are produced with kinematic properties that are similar to those in Standard Model processes. Results are found to be compatible with the Standard Model expectations in the signal regions targeting large and intermediate mass splittings, and chargino-neutralino masses up to 600 GeV are excluded at 95% confidence level for a massless lightest supersymmetric particle. Excesses of data above the expected background are found in the signal regions targeting low mass splittings, and the largest local excess amounts to 3.0 standard deviations.
A search for doubly charged scalar bosons decaying into W boson pairs is presented. It uses a data sample from proton-proton collisions corresponding to an integrated luminosity of 36.1fb-1 collected by the ATLAS detector at the LHC at a centre-of-mass energy of 13TeV in 2015 and 2016. This search is guided by a model that includes an extension of the Higgs sector through a scalar triplet, leading to a rich phenomenology that includes doubly charged scalar bosons H +/-+/-. Those bosons are produced in pairs in proton-proton collisions and decay predominantly into electroweak gauge bosons H +/-+/- W +/- W +/-. Experimental signatures with several leptons, missing transverse energy and jets are explored. No significant deviations from the Standard Model predictions are found. The parameter space of the benchmark model is excluded at 95% confidence level for H +/-+/- bosons with masses between 200 and 220 GeV.
Searches for non- resonant and resonant Higgs boson pair production are performed in the..WW * channel with the final state of.. .j j using 36.1 fb - 1 of protonpv roton collision data recorded at a centre- of- mass energy of s = 13 TeV by the ATLAS detector at the Large Hadron Collider. No significant deviation from the Standard Model prediction is observed. A 95% confidence- level observed upper limit of 7.7 pb is set on the cross section for nonresonant production, while the expected limit is 5.4 pb. A search for a narrow- width resonance X decaying to a pair of Standard Model Higgs bosons HH is performed with the same set of data, and the observed upper limits on s( pp. X) x B( X. HH) range between 40.0 and 6.1 pb for masses of the resonance between 260 and 500GeV, while the expected limits range between 17.6 and 4.4 pb. When deriving the limits above, the StandardModel branching ratios of the H... and H. WW * are assumed.
This paper describes a search for events with one top-quark and large missing transverse momentum in the final state. Data collected during 2015 and 2016 by the ATLAS experiment from 13 TeV proton-proton collisions at the LHC corresponding to an integrated luminosity of 36.1 fb(-1) are used. Two channels are considered, depending on the leptonic or the hadronic decays of the W boson from the top quark. The obtained results are interpreted in the context of simplified models for dark-matter production and for the single production of a vector-like T quark. In the absence of significant deviations from the Standard Model background expectation, 95% confidence-level upper limits on the corresponding production cross-sections are obtained and these limits are translated into constraints on the parameter space of the models considered.
A search for new phenomena in events with two same- charge leptons or three leptons and jets identi fi ed as originating from b - quarks in a data sample of 36.1 fb of pp collisions at ps = 13TeV recorded by the ATLAS detector at the Large Hadron Collider is reported. No signi fi cant excess is found and limits are set on vector- like quark, fourtop- quark, and same- sign top- quark pair production. The observed ( expected) 95% CL mass limits for a vector- like T - and B - quark singlet are mT > 0 : 98 ( 0 : 99) TeV and mB > 1 : 00 ( 1 : 01) TeV respectively. Limits on the production of the vector- like T5=3 - quark are also derived considering both pair and single production; in the former case the lower limit on the mass of the T5=3 - quark is ( expected to be) 1.19 ( 1.21) TeV. The Standard Model fourtop- quark production cross- section upper limit is ( expected to be) 69 ( 29) fb. Constraints are also set on exotic four- top- quark production models. Finally, limits are set on samesign top- quark pair production. The upper limit on uu ! tt production is ( expected to be) 89 ( 59) fb for a mediator mass of 1TeV, and a dark- matter interpretation is also derived, excluding a mediator of 3TeV with a dark- sector coupling of 1.0 and a coupling to ordinary matter above 0.31.
Results of a search for the pair production of photon-jets-collimated groupings of photons-in the ATLAS detector at the Large Hadron Collider are reported. Highly collimated photon-jets can arise from the decay of new, highly boosted particles that can decay to multiple photons collimated enough to be identified in the electromagnetic calorimeter as a single, photonlike energy cluster. Data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 36.7 fb(-1), were collected in 2015 and 2016. Candidate photon-jet pair production events are selected from those containing two reconstructed photons using a set of identification criteria much less stringent than that typically used for the selection of photons, with additional criteria applied to provide improved sensitivity to photon-jets. Narrow excesses in the reconstructed diphoton mass spectra are searched for. The observed mass spectra are consistent with the Standard Model background expectation. The results are interpreted in the context of a model containing a new, high-mass scalar particle with narrow width, X, that decays into pairs of photon-jets via new, light particles, a. Upper limits are placed on the cross section times the product of branching ratios sigma x B(X -> aa) x B(a -> gamma gamma)(2) for 200 GeV < m(X) < 2 TeV and for ranges of m(a) from a lower mass of 100 MeV up to between 2 and 10 GeV, depending upon m(X). Upper limits are also placed on sigma x B(X -> aa) x B(a -> 3 pi(0))(2) for the same range of m(X) and for ranges of m(a) from a lower mass of 500 MeV up to between 2 and 10 GeV.
A search for resonant and nonresonant pair production of Higgs bosons in the b (b) over bar tau(+)tau(-) final state is presented. The search uses 36.1 fb(-1) of pp collision data with root s = 13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the tau-lepton pairs with at least one tau lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV < m(X) < 402 GeV in the simplified hMSSM minimal supersymmetric model for tan beta = 2 and excluding bulk Randall-Sundrum gravitons G(KK) in the mass range 325 GeV < m(GKK) < 885 GeV for k/(M) over bar P-1 = 1.
This Letter presents a search for the production of a long-lived neutral particle (Zd) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) Z boson produced via an intermediate scalar boson, where Z → l+l- (l = e, μ). The data used were collected by the ATLAS detector during 2015 and 2016 pp collisions with a center-of-mass energy of √s = 13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1 ± 0.8 fb-1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its c τ from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a c τ approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for mzd between 5 and 15 GeV.
This paper describes a strategy for a general search used by the ATLAS Collaboration to find potential indications of new physics. Events are classified according to their final state into many event classes. For each event class an automated search algorithm tests whether the data are compatible with the Monte Carlo simulated expectation in several distributions sensitive to the effects of new physics. The significance of a deviation is quantified using pseudo-experiments. A data selection with a significant deviation defines a signal region for a dedicated follow-up analysis with an improved background expectation. The analysis of the data-derived signal regions on a new dataset allows a statistical interpretation without the large look-elsewhere effect. The sensitivity of the approach is discussed using Standard Model processes and benchmark signals of new physics. As an example, results are shown for 3.2fb-1 of proton-proton collision data at a centre-of-mass energy of 13TeV collected with the ATLAS detector at the LHC in 2015, in which more than 700 event classes and more than 105 regions have been analysed. No significant deviations are found and consequently no data-derived signal regions for a follow-up analysis have been defined.
A search for pair production of the supersymmetric partners of the Higgs boson (higgsinos (H) over tilde) in gaugemediated scenarios is reported. Each higgsino is assumed to decay to a Higgs boson and a gravitino. Two complementary analyses, targeting high- and low-mass signals, are performed to maximize sensitivity. The two analyses utilize LHC pp collision data at a center-of-mass energy root s = 13 TeV, the former with an integrated luminosity of 36.1 fb(-1) and the latter with 24.3 fb(-1), collected with the ATLAS detector in 2015 and 2016. The search is performed in events containing missing transverse momentum and several energetic jets, at least three of which must be identified as b-quark jets. No significant excess is found above the predicted background. Limits on the cross section are set as a function of the mass of the <(Hover tilde> in simplified models assuming production via mass-degenerate higgsinos decaying to a Higgs boson and a gravitino. Higgsinos with masses between 130 and 230 GeV and between 290 and 880 GeV are excluded at the 95% confidence level. Interpretations of the limits in terms of the branching ratio of the higgsino to a Z boson or a Higgs boson are also presented, and a 45% branching ratio to a Higgs boson is excluded for m(<(Hover tilde>) approximate to 400 GeV.


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My simple answer to the problem of Wind Raider mold reuse.
Many fans suggeste the Water Rider from the MYP show, and I think that toally makes sense.
Can be done with a few new parts, and a simple recoloring of the main piece.
To really get people to buy it, it could come with a pilot, which could be a straight repaint of the regular Wind Raider Pilot (which I will maybe post on its own later on)
Overall, that was a rushed job I did today. just a simple photo manipulation. It's more supposed to show they idea then being an actual design, so please forgive the roughness of some the ideas


text:
nietzsche wrote:is that the girl from mythbusters?
She's married and has at least one kid, now.
I remember seeing her in a season pregnant.
She is such a goddamn fine woman, though.
I've got a thing for redheads and dirty blondes. (Real ones, not fake, thanks... not that into gingers, though.)
Wouldn't mind a friendly game of hide the sausage with her...


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Commercial MythTV System
From MythTV Official Wiki
Commercial MythTV Systems
This is a list of companies who sell hardware bundled with a MythTV pre-install or sell uninstalled MythTV-compatible systems.
- Cosmos Engineering as seen in Aug06 Linux Journal. Based in Los Angeles.
- D1 : Australian company, sells a "Home Media Centre" based on MythTV (It is a pity that MythTV isn't credited in any way on their web site however. Hint hint.)
- Monolith Media Center : Sells Ubuntu MythTV units with automated setup scripts and a line of accessories too for the non-linux MythTV lovers!
- MythiC.TV : Sells Dragon, a Knoppmyth Reference Platform system, as seen in Dec06 Linux Magazine. Installation takes 13 minutes thanks to customized automation, and upgrades are easy because of KnoppMyth. The hardware specification is fully published, allowing the DIY crowd to build their own.
- OpenMedia : NZ based company that have developed myPVR, a supported pre-installed MythTV based hardware solution.
- SolarPC : Sells silent stationary or mobile MythTV solutions
- TV Ease : "Hannibal" Media Centers. Pre-installed systems, MythTV on Ubuntu Linux. Custom configurations available.


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