first_imgShare4Editor’s note: Links to a video and images for download appear at the end of this release.David [email protected] [email protected] hits confirm graphene’s strengthRice University lab test material for suitability in body armor, spacecraft protection HOUSTON – (Dec. 1, 2014) – Graphene’s great strength appears to be determined by how well it stretches before it breaks, according to Rice University scientists who tested the material’s properties by peppering it with microbullets.The two-dimensional carbon honeycomb discovered a decade ago is thought to be much stronger than steel. But the Rice lab of materials scientist Edwin “Ned” Thomas didn’t need even close to a pound of graphene to prove the material is on average 10 times better than steel at dissipating kinetic energy.The researchers report in the latest edition of Science that firing microscopic projectiles at multilayer sheets of graphene allowed the scientists to determine just how hard it is to penetrate at the nano level – and how strong graphene could be in macroscopic applications.Thomas suggested the technique he and his research group developed could help measure the strength of a wide range of materials.While other labs have looked extensively at graphene’s electronic properties and tensile strength, nobody had taken comprehensive measurements of its ability to absorb an impact, Thomas said. His lab found graphene’s ability to simultaneously be stiff, strong and elastic gives it extraordinary potential for use as body armor or for shielding spacecraft.The lab pioneered its laser-induced projectile impact test (LIPIT), which uses the energy from a laser to drive microbullets away from the opposite side of an absorbing gold surface at great speed. In 2012, they first used an earlier version of LIPIT to determine the properties of multiblock copolymers that could not only stop microbullets but also completely encase them.Since that study, Thomas and lead author Jae-Hwang Lee, a former research scientist at Rice and now an assistant professor at the University of Massachusetts at Amherst, have enhanced their technique to fire single microscopic spheres with great precision at speeds approaching 3 kilometers per second, much faster than a speeding bullet from an AK-47.The researchers built a custom stage to line up multilayer graphene sheets mechanically drawn from bulk graphite. They tested sheets ranging from 10 to 100 nanometers thick (up to 300 graphene layers). They then used a high-speed camera to capture images of the projectiles before and after hits to judge their speed and viewed microscope images of the damage to the sheets.In every case, the 3.7-micron spheres punctured the graphene. But rather than a neat hole, the spheres left a fractured pattern of “petals” around the point of impact, indicating the graphene stretched before breaking.“We started writing the paper about the petals, but as we went along, it became evident that wasn’t really the story,” said Thomas, the William and Stephanie Sick Dean of Rice’s George R. Brown School of Engineering. “The bullet’s kinetic energy interacts with the graphene, pushes forward, stretches the film and is slowed down.”The experiments revealed graphene to be a stretchy membrane that, in about 3 nanoseconds before puncture, distributes the stress of the bullet over a wide area defined by a shallow cone centered at the point of impact. Tensile stress cannot travel faster than the speed of sound in materials, and in graphene, it’s much faster than the speed of sound in air (1,125 feet per second).“For graphene, we calculated the speed at 22.2 kilometers per second, which is higher than any other known material,” Thomas said.As a microbullet impacts the graphene, the diameter of the cone it creates – determined by later examination of the petals – provides a way to measure how much energy the graphene absorbs before breaking.“The game in protection is getting the stress to distribute over a large area,” Thomas said. “It’s a race. If the cone can move out at an appreciable velocity compared with the velocity of the projectile, the stress isn’t localized beneath the projectile.”Controlled layering of graphene sheets could lead to lightweight, energy-absorbing materials. “Ideally you would have a lot of independent layers that aren’t too far apart or so close that they’re touching, because the loading goes from tensile to compressive,” Thomas said. That, he said, would defeat the purpose of spreading the strain away from the point of impact.He expects LIPIT will be used to test many experimental materials. “Before you scale a project up, you’ve got to know what will work,” he said. “LIPIT lets us develop rapid methodologies to test nanoscale materials and find promising candidates. We’re working to demonstrate to NASA and the military that these microscopic tests are relevant to macroscopic properties.”The paper’s co-authors are Rice graduate student Phillip Loya and Jun Lou, an associate professor of materials science and nanoengineering. The Defense Threat Reduction Agency and the Welch Foundation supported the research.-30-Ned Thomas shows how firing microbullets at graphene quantify its strength in this video: http://youtu.be/Sevm_DHu05oRead the abstract at http://www.sciencemag.org/content/346/6213/1092.shortThis news release can be found online at http://news.rice.edu/2014/12/01/microbullet-hits-confirm-graphenes-strength/Follow Rice News and Media Relations via Twitter @RiceUNewsRelated Materials:Thomas Research Group: http://msne.rice.edu/nedthomas/Lee Nano-engineering Laboratory: https://blogs.umass.edu/leejh/Rice Department of Materials Science and NanoEngineering: http://msne.rice.eduImages for download: http://news.rice.edu/files/2014/11/1208_GRAPHENE-3-web.jpgMaterials scientist Edwin “Ned” Thomas, left, dean of the George R. Brown School of Engineering at Rice University, and Jae-Hwang Lee, a former research scientist in his lab and now an assistant professor at the University of Massachusetts, Amherst, found graphene is stronger than steel in tests with microbullets. The researchers hold a polymer encasing bullets, the focus of a previous experiment. (Credit: Tommy LaVergne/Rice University) http://news.rice.edu/files/2014/11/1208_GRAPHENE-6-web.jpgA photo illustration shows the petal pattern left by a microbullet (inserted for size comparison) fired at graphene in an experiment at Rice University. The research demonstrated graphene is 10 times better than steel at absorbing the energy of a penetrating projectile. (Credit: Photo illustration by Jae-Hwang Lee/Rice University) http://news.rice.edu/files/2014/11/1208_GRAPHENE-5-web.jpgA graphic shows how a microbullet traveling at supersonic speed bursts through a sheet of multilayer graphene, but not before the graphene absorbs much of the energy of the impact. Measurements taken at Rice University show that graphene is 10 times better than steel at absorbing the energy of a penetrating projectile. (Credit: Thomas Research Group/Rice University) http://news.rice.edu/files/2014/11/1208_GRAPHENE-1-web.jpgRice University scientists fired microbullets at supersonic speeds in experiments that show graphene is 10 times better than steel at absorbing the energy of a penetrating projectile. (Credit: Jae-Hwang Lee/Rice University) FacebookTwitterPrintEmailAddThis http://news.rice.edu/files/2014/11/1208_GRAPHENE-2-web.jpgA microbullet traveling at supersonic speed is captured in this composite of three timed images as it makes its way toward a suspended sheet of multilayer graphene. Experiments carried out at Rice University show graphene is 10 times better than steel at absorbing the energy of a penetrating projectile. The bubble at left is a polymer film expanding away from the gold substrate that transfers energy from a laser to the microbullet. (Credit: Thomas Research Group/Rice University) Located on a 300-acre forested campus in Houston, Rice University is consistently ranked among the nation’s top 20 universities by U.S. News & World Report. Rice has highly respected schools of Architecture, Business, Continuing Studies, Engineering, Humanities, Music, Natural Sciences and Social Sciences and is home to the Baker Institute for Public Policy. With 3,920 undergraduates and 2,567 graduate students, Rice’s undergraduate student-to-faculty ratio is just over 6-to-1. Its residential college system builds close-knit communities and lifelong friendships, just one reason why Rice is highly ranked for best quality of life by the Princeton Review and for best value among private universities by Kiplinger’s Personal Finance. To read “What they’re saying about Rice,” go here. http://news.rice.edu/files/2014/11/1208_GRAPHENE-4-web.jpgA graphic shows how a microbullet traveling at supersonic speed bursts through a sheet of multilayer graphene, but not before the graphene absorbs much of the energy of the impact. Measurements taken at Rice University show that graphene is 10 times better than steel at absorbing the energy of a penetrating projectile. (Credit: Thomas Research Group/Rice University)last_img

Related Posts

first_img You have entered an incorrect email address! Please enter your email address here Editor’s Note: This is the eighth in a series of articles published by The Apopka Voice in 2016 that were the most noteworthy events of the year. The Apopka Voice will publish them starting today and running until Friday, December 30th. During the New Year’s weekend (Friday, December 30th – Sunday, January 1st) we will publish a poll and let the readers decide on which story is the most impactful of the year. Originally Published: June 15th, 2016The Apopka City Council voted 5-0 last night to  approve Chuck Carnesale as Apopka’s new fire chief. He takes over a department of more than 80 firefighters.“He started as an Explorer at age 13, graduated high school, Fire Academy and EMT school simultaneously in 1989, and was a dispatcher at age 17,” said Mayor Joe Kilsheimer. ” he has filled almost every position at The Apopka Fire department.”“I hate to mention I’ve been on this journey for 33 years when my mother dropped me off to look at fire trucks,” said Carnesale. “Thank you. I won’t let you down. I won’t let the public down. I won’t let the firefighters down.”Carnesale has served as assistant fire chief since 2013, heading up the fire department’s emergency medical and ambulance services. He is certified as a firefighter, EMT/paramedic, fire officer, fire inspector and instructor in various fields. In 1990, Carnesale was hired as a full-time firefighter/EMT. In 2000 he was recognized by then Gov. Jeb Bush as Apopka’s Firefighter of the Year.Chuck CarnesaleHe was promoted to engineer in 2001, lieutenant in 2005, captain and EMS coordinator in 2006 and assistant fire chief in 2013. Carnesale attended Seminole State and Valencia colleges, Florida State Fire College and the National Fire Academy in Emmitsburg, MD.He has served on several medical boards, and this year Orange County Medical Director Dr. George Ralls appointed him to the Orange County EMS Advisory Council.The City Council was pleased with Kilsheimer’s choice.“Chuck is an amazing person,” said Commissioner Kyle Becker. I know he is going to do a fantastic job. I couldn’t be more happy for you (Carnesale).”“I’m glad we brought someone in from our own fire department,” said Commissioner Billie Dean. “We have the best fire department in America. We should hire from within. I commend you (Kilsheimer) on the choice.”Carnesale replaces former Fire Chief Lee Bronson. TAGSApopka Fire DepartmentChuck CarnesaleFire Chief Previous articleBiggest Apopka stories of 2016: Warrant issued for Richard Anderson’s arrestNext article5 Ways to Beat Mindless Eating Denise Connell RELATED ARTICLESMORE FROM AUTHOR LEAVE A REPLY Cancel reply Florida gas prices jump 12 cents; most expensive since 2014 UF/IFAS in Apopka will temporarily house District staff; saves almost $400,000 Please enter your name here Please enter your comment! Share on Facebook Tweet on Twitter Gov. DeSantis says new moment-of-silence law in public schools protects religious freedom Save my name, email, and website in this browser for the next time I comment.last_img

first_imgShare on Facebook Tweet on Twitter Herb Weissman You have entered an incorrect email address! Please enter your email address here March 31, 2019 at 4:46 pm Mike, isn’t it the truth? There is that old saying, “Those that forget the past are doomed to repeat it. I have lived long enough to have seen a lot of change and not all of it was positive! We need to lean on Papa God more and our own wisdom less. Pray, and trust Him for He is our blessed hope, today, tomorrow, and forever. Blessings on you and yours my friend, Chaz LEAVE A REPLY Cancel reply Faith, I look forward to heaven for that reason “And there shall be no hurt or pain…” Praise God always, Chaz Mike McFadden March 31, 2019 at 8:35 am EJ March 31, 2019 at 2:50 pm March 31, 2019 at 8:56 am April 1, 2019 at 8:25 am Herb,if you enjoy it half as much as I do writing it? Wow. Thanks my friend, Chaz charles towne charles towne March 31, 2019 at 9:07 am Faith Fowler Reply charles towne Reply My grandfathers, my dad, a lot of others seemed to know what the old dog knew, that sometimes a good hard swat is the best lesson!They all knew that and sometimes it seems Papa God understands that gentle words just aren’t enough! Thanks for all the swats…I am still here and still learning! Reply Charles. I have nothing definitive to say except that I so enjoy you writing that I look forward to every Sunday for a new story. See you Tuesday. Yea Richard my friend, the lessons of life are sometimes difficult, but? Thanks Papa God for not molly coddling us . Thanks for the comment pal, Chaz Talk about a GUARDING ANGEL! GOD Keeps us safe even when we are not even Aware of it, often times only to relalise it if at all Years Later! Thank you Lord! The Anatomy of Fear Reply charles towne Reply I agree, you are a great story teller! Thanks Charles and have a blessed day. Reply Richard InspirationBy Charles Towne            The pup had reached the end of the trail.  With no idea what he had been following he had come face to face with his quarry.  Yes, he had reached the end of the trail and it could very well be his last, for the formidable creature that he faced could kill, horribly.  The young dog did not realize the danger it faced.         He had been following the old dog, eagerly watching as the veteran worked a covey of quail.  The covey had been hunted only a short time before, and now, each time the old dog thought he had brought the birds to a stand the quail would break, running along the ground to the next bit of cover.         Disgusted, the old dog quit following the fidgety birds and began casting about.  Near a stand of scrub oak, he discovered another covey.  He began a circling movement to bring the quail to a stand.         Following the old dog’s lead, the pup was also trailing a fresh scent.  Unlike the old dog the pup did not know what it was he trailed.  This was an unfamiliar scent and his curiosity drove him on.         Whatever it was that he followed; it had passed through a large stand of scrub palmetto, and then alongside the full length of an old burned out pine log to finally circle a small clearing. Totally engrossed in the trail the pup was using his nose to vacuum any vagrant wisps of scent from the ground.         This was not quail that the pup followed, oh no. Nor was it rabbit.  He had been cured of trailing rabbit.  If a rabbit were to leap from cover right under his nose he would ignore it.  He knew that his man didn’t want him to chase rabbits, nor did the old dog, and he wanted to please them both.         The scent that he followed was very faint, a strange musky odor, so vague as to be almost undetectable.  He was sure the old dog would be proud of him.  He continued on the trail. Hmmmm, whatever it was had entered a big gopher tortoise burrow!  The pup forced his head and shoulders into the burrow and snuffed deeply several times.  All he could detect was the turtle’s earthy scent. Backing out he immediately picked up the trail again.         He was approaching a small stand of scrub oak and was in the process of circling an old, fire-blackened pine stump when he came face to face with his quarry.         A peculiar, dry buzzing sound stopped him in his tracks.         His excitement was obvious as his tail wagged his entire hind end.  The pup had worked the trail to perfection and he was proud.         The only problem was that his first trailing experience could very well be his last.

         Only a few feet in front of his nose lay a very large and a very angry Eastern Diamondback Rattlesnake.  The deadly reptile was loosely coiled, its head slightly raised, that black tongue slowly flicking out, tasting the air.   The snake was telling the dog in no uncertain terms that it was ready to defend itself.         Over six feet in length and larger then a man’s arm, the powerful reptile turned away from the pup and began to crawl toward a large clump of scrub oak and palmetto growth.  As the snake moved so did the pup, taking two steps forward.         This movement on the dog’s part was more than the snake could tolerate.  It immediately stopped and assumed its full defensive position.  Coiled, head raised a foot above the ground, the air filled with the castanet sound of its rattles, the diamondback waited.         The large venomous reptile knew that it couldn’t eat the dog and it didn’t want a confrontation, but what must be would be.         The previous year a German shepherd had confronted the snake.  The diamondback had defended itself in the only way it knew. Struck full in the face the dog had received a massive dose of venom.   It was highly unlikely that anyone could have helped the dog even if that had been an option.  Abandoned, alone, the big dog died a terrible death, there in the stillness of the forest.         The pup, imitating the old dog in a beautiful point, was excited that he had been able to bring this noisy creature to bay. 
He had watched his teacher move in on a covey of quail with such stealth that he would come to a final point only inches from one of the birds.  Then he would hold that point until his master arrived to kick up the covey.         The pup’s movements were beautiful to behold as he slowly lowered his foot and then leaning forward he once again assumed that statuesque pose.  His intention was to approach as close to his subject as the old dog had been to the quail. Another small step and less than three feet remained to separate the youngster from an ugly death.   But he had no way of knowing this.         Usually dogs will stay away from rattlesnakes. Sadly, every year there are those few that do get struck and this youngster’s curiosity was getting the best of him.         The diamondback, eyes shining brightly, drew its head back in preparation as it measured the distance.         If snakes thought in words as humans do its thoughts would have been, “Come closer foolish one. Just one more step and I will teach you a most unpleasant lesson, the last lesson you will ever learn.’”         The pup, as if answering the snake’s unspoken suggestion, began to raise his right foreleg, his body already moving forward. When he stopped he would be within striking distance of those deadly fangs.         Then it happened!  There was a blur of movement and the pup was struck with such force he was knocked rolling, yipping in surprise and confusion.         The old dog had followed the pup.  Taking in the situation at a glance he acted. Charging from the side he struck the pup with his shoulder, instantly knocking the young dog out of range of the diamondback’s strike.         The snake struck!         Its mouth agape, fangs erect, it struck hard and fast, passing through the empty space beneath the old dog’s body.         The old dog, rumbling a warning to the pup, led him away from the place as the grandfather diamondback crawled away in the opposite direction.         Soon the two dogs were back with their human. The man was pleased with the two dogs as they ran toward him.   He thought, ‘that pup’s going to be as good a bird dog as his old man!’         The hunt had been a success.  There were quail in the bag and more importantly, the dogs had worked like the champions they were.         Oh yes, and unbeknownst to their human, thanks to the old dog, the pup would be there to hunt another day.         Meanwhile, back in the thicket of scrub oak, and saw palmetto, lying loosely coiled at the mouth of a gopher tortoise burrow is the grandfather diamondback. After its encounter with the dogs, it had happened upon a luckless cottontail rabbit.  The rabbit was not as fortunate as the pup.  The snake lay relaxed, its stomach full.   It would not need to eat again for several days, and tomorrow would be another day.AN OUTDOORSMAN’S PRAYER
Dear Lord, praise you oh mighty God, praise you.  Father, please lead me and guide me through the perils of this life.  Keep me safe from the wiles of that old serpent, known as Satan, or the devil.  I realize that I have placed myself in harms way many times, and you, gracious God that you are, placed yourself between me and great harm, even death.  How many times have you stepped between me and perilous situations I will not know until that great day and you will be able to share with me how you kept me from harm.  Lord, I love you, and I thank you, please stay with me, never leave me.  Thank you almighty God, thank you and praise you, in Jesus’ most holy name I ask it, Amen Charles Towne is first and foremost a Christian. An octogenarian, author, journalist, wildlife photographer, naturalist, caregiver, and survivor, his life has been and continues to be, a never-ending adventure filled with possibilities never imagined. He has adopted the philosophy that to Live fully, laugh uproariously, love passionately, and learn like there is no tomorrow, is a formula for a long and joy-filled life. Save my name, email, and website in this browser for the next time I comment.center_img March 31, 2019 at 9:54 am April 5, 2019 at 11:40 am Reply Great story by the master story teller. The young pup lives to hunt another day thanks to the quick thinking of experience. Socialism is much like the deadly rattlesnake and let’s pray today’s young politicians and voters learn from the plight of the people in the once prospering “burrow” known as Venezuela. If not, we are all in for a very painful experience that could lead to the death of this great country. CSG 14 COMMENTS Great story!It is a reminder of just howGod protects us, even whenwe don’t know we’re in danger!Lord, may we be ever sensitive to your guidance and alwayslearning from our experiences.Thank you for your loving mercyand protection around us each and everyday!AmenThanks Chuck! God bless you! charles towne charles towne Reply Dear CSG, His love is magnificent and each and every day is a reminder that He never ceases watching over each and every one of us even when we are determined to go our own way. You are so very special to Him dear one, and He will never fail to be there for you. Friends and family may drift away But He is and always will be there for you. Bless you dear friend, Chaz I found myself wanting to grab that pup and save it! So glad the ending was a good one for the dogs…sorry for the rabbit! April 5, 2019 at 5:54 pm Reply EJ, The day will come when the complete truth of the matter will be revealed to us and our eyes will be opened and we will be able to see the times when the evil one’s plans have been thwarted by divine intervention, wow! What a day of rejoicing that will be! Thanks pal, many blessings on you and yours, Chaz Please enter your comment! Reply TAGSCharles TowneInspiration Previous articleNonprofits that scrimp on overhead aren’t necessarily better than those spending moreNext articleSeafood specials for Lent Denise Connell RELATED ARTICLESMORE FROM AUTHOR March 31, 2019 at 9:15 am Free webinar for job seekers on best interview answers, hosted by Goodwill June 11 Reply June 1, 2019 at 7:36 pm Reply Reply NH, A life well lived is a great teacher, don’t you believe? Open our eyes Father that we may see and give us open minds and willing hearts that we may bless all. Bless you dear heart, Chaz June 27, 2020 at 3:26 pm Support conservation and fish with NEW Florida specialty license plate NH March 31, 2019 at 9:31 am charles towne Please enter your name here March 31, 2019 at 11:53 pm Reply last_img

first_img Vali Homes Prototype / colab studio + 180 degrees design Civil: Mechanical: United States “COPY” Area:  1500 ft² Year Completion year of this architecture project BDA engineers ShareFacebookTwitterPinterestWhatsappMailOrhttps://www.archdaily.com/580798/vali-homes-prototype-colab-studio-180-degrees-design Clipboard Save this picture!© Mark Bosclaire+ 17 Share Vali Homes Prototype / colab studio + 180 degrees designSave this projectSaveVali Homes Prototype / colab studio + 180 degrees design Houses Year:  City:PhoenixCountry:United StatesMore SpecsLess SpecsSave this picture!© Mark BosclaireText description provided by the architects. A triumvirate team of Developer/Sustainability-Consultant, Architect, and General Contractor engaged in creating a standard plan prototype house for infill lots in downtown Phoenix. Three main goals were:1. Create a prototype house inspired by the “case-study” homes of the 1960’s, designed for our time and place, and with the greatest amount of sustainability possible.Save this picture!© Mark Bosclaire2. Create a low-to-mid cost home with high design, quality, and sustainability.3. Create a design that may be replicated for any typical lot within Phoenix.Save this picture!© Mark BosclaireThe team processed six versions. We tested, energy-modelled, and priced each to find an optimal balance between design, performance, and cost.Save this picture!Floor PlanThe two-bedroom home is designed to fit on any typical lot downtown. The goal is to improve existing neighborhoods by building homes where derelict sites currently exist.Save this picture!© Mark BosclaireThe home surpassed LEED Platinum certification, and provided a blower test rating of .68 ach50. The 1500 GSF house uses about 6000 kWh (about $700 worth) of electricity per year offset by a 3.6 kw PV system for a net-positive energy house.Save this picture!SectionSave this picture!© Mark BosclaireProject gallerySee allShow lessCasa do Povo da Maia Nursery / M-ArquitectosSelected Projects1–6 Copper Lane N16 9NS / Henley Halebrown Rorrison ArchitectsSelected Projects Share CopyHouses•Phoenix, United States Architects: 180 degrees design, colab studio Area Area of this architecture project 2013 Projects Electrical: Otterbein Engineering DRW “COPY” Structural: ArchDaily Photographs Woodward Engineering Manufacturers: Fantech ShareFacebookTwitterPinterestWhatsappMailOrhttps://www.archdaily.com/580798/vali-homes-prototype-colab-studio-180-degrees-design Clipboard Photographs:  Mark Bosclaire Manufacturers Brands with products used in this architecture project CopyAbout this officecolab studioOfficeFollow180 degrees designOfficeFollowProductsWoodConcrete#TagsProjectsBuilt ProjectsSelected ProjectsResidential ArchitectureHousesWoodPhoenixHousesUnited StatesPublished on December 27, 2014Cite: “Vali Homes Prototype / colab studio + 180 degrees design ” 27 Dec 2014. ArchDaily. Accessed 11 Jun 2021. ISSN 0719-8884Browse the CatalogVentilated / Double Skin FacadeTechnowoodProfile Façade SystemGlassMitrexSolar PanelsMetal PanelsAurubisCopper Alloy: Nordic RoyalFiber Cements / CementsEQUITONEFiber Cement Facade Panel PicturaCultural / PatrimonialIsland Exterior FabricatorsSeptember 11th Memorial Museum Envelope SystemConcreteKrytonSmart ConcreteSignage / Display SystemsGoppionDisplay Case – B-ClassMetal PanelsLorin IndustriesAnodized Aluminum – Stainless Steel FinishesWoodStructureCraftEngineering – Mass TimberWindowspanoramah!®ah!38 – FlexibilityChairsSellexChair – IrinaBathroom FurnitureKaleBathroom Cabinets – ZeroMore products »Save世界上最受欢迎的建筑网站现已推出你的母语版本!想浏览ArchDaily中国吗?是否翻译成中文现有为你所在地区特制的网站?想浏览ArchDaily中国吗?Take me there »✖You’ve started following your first account!Did you know?You’ll now receive updates based on what you follow! Personalize your stream and start following your favorite authors, offices and users.Go to my streamlast_img

Leave a Reply

Your email address will not be published. Required fields are marked *