Nikolaj Coster-Waldau by Bjorn Iooss (Vogue Italy)
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Sunday, July 31, 2016
shadowcats: Nikolaj Coster-Waldau by Bjorn Iooss (Vogue Italy)
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Supercomputers find a way of making 'imitation graphene' from salt
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Researchers from Moscow Institute of Physics and Technology (MIPT), Skolkovo Institute of Science and Technology (Skoltech),
the Technological Institute for Superhard and Novel Carbon Materials (TISNCM), the National University of Science and Technology MISiS (Russia), and Rice University (USA) used computer simulations to find how thin a slab of salt has to be in order for it to break up into graphene-like layers. Based on the computer simulation, they derived the equation for the number of layers in a crystal that will produce ultrathin films with applications in nanoelectronics.
From 3D to 2DUnique monoatomic thickness of graphene makes it an attractive and useful material. Its crystal lattice resembles a honeycombs, as the bonds between the constituent atoms form regular hexagons. Graphene is a single layer of a three-dimensional graphite crystal and its properties (as well as properties of any 2D crystal) are radically different from its 3D counterpart. Since the discovery of graphene, a large amount of research has been directed at new two-dimensional materials with intriguing properties. Ultrathin films have unusual properties that might be useful for applications such as nano- and microelectronics.
Previous theoretical studies suggested that films with a cubic structure and ionic bonding could spontaneously convert to a layered hexagonal graphitic structure in what is known as graphitisation. For some substances, this conversion has been experimentally observed. It was predicted that rock salt NaCl can be one of the compounds with graphitisation tendencies. Graphitisation of cubic compounds could produce new and promising structures for applications in nanoelectronics. However, no theory has been developed that would account for this process in the case of an arbitrary cubic compound and make predictions about its conversion into graphene-like salt layers.
Transition from a cubic arrangement into several hexagonal layers.SOURCE - Eurekalert
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Saturday, July 30, 2016
eccellenze-italiane: CAPRI casa di Matteo Thun
theclassyissue: Krystel Mari (Ford Europe) shot by Maximilian...
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Krystel Mari (Ford Europe) shot by Maximilian Rivera. @fordmodels
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Vortex laser encodes 10 times more data
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Researchers are pushing laser technology forward using another light manipulation
technique called orbital angular momentum, which distributes the laser in a corkscrew pattern with a vortex at the center.
Usually too large to work on today’s computers, the UB-led team was able to shrink the vortex laser to the point where it is compatible with computer chips. Because the laser beam travels in a corkscrew pattern, encoding information into different vortex twists, it’s able to carry 10 times or more the amount of information than that of conventional lasers, which move linearly.
The vortex laser is one component of many, such as advanced transmitters and receivers, which will ultimately be needed to continue building more powerful computers and datacenters.
The image above shows vortex laser on a chip. Because the laser beam travels in a corkscrew pattern, encoding information into different vortex twists, it’s able to carry 10 times or more the amount of information than that of conventional lasers. Credit:University of Buffalo.SOURCES - University of Buffalo
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bienenkiste: Photographed by BriAnne Willis for Pressure...
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Photographed by BriAnne Willis for Pressure Magazine
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Nanoblocks form pixels to enable meta-hologram
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By carefully arranging many nanoblocks to form pixels on a metasurface, researchers have demonstrated that they
can manipulate incoming visible light in just the right way to create a color "meta-hologram." The new method of creating holograms has an order of magnitude higher reconstruction efficiency than similar color meta-holograms, and has applications for various types of 3D color holographic displays and achromatic planar lenses.
The pixels on the new metasurface consist of three types of silicon nanoblocks whose precise dimensions correspond to the wavelengths of three different colors: red, green, and blue. To enhance the efficiency for the blue light, two identical nanoblocks corresponding to the blue light are arranged in each pixel, along with one nanoblock for red light and one for green light.
The researchers explain that each pixel can be thought of as a "meta-molecule" because it is the basic repeating, subwavelength unit of the larger metasurface that constitutes the entire hologram. The meta-molecules enable the metasurface to control light in ways that are not possible without modern nanoscale design.
When red, green, and blue lasers illuminate the hologram, each nanoblock manipulates the phase of its corresponding color. The researchers explain that a key achievement of the study was to minimize the interactions between nanoblocks so that the nanoblocks function almost independently of each other. Then by orienting the nanoblocks in different ways, the researchers could change the light's phase manipulation, resulting in different holographic images.
Nanoletters - Visible-Frequency Dielectric Metasurfaces for Multiwavelength Achromatic and Highly Dispersive Holograms AbstractDielectric metasurfaces built up with nanostructures of high refractive index represent a powerful platform for highly efficient flat optical devices due to their easy-tuning electromagnetic scattering properties and relatively high transmission efficiencies. Here we show visible-frequency silicon metasurfaces formed by three kinds of nanoblocks multiplexed in a subwavelength unit to constitute a metamolecule, which are capable of wavefront manipulation for red, green, and blue light simultaneously. Full phase control is achieved for each wavelength by independently changing the in-plane orientations of the corresponding nanoblocks to induce the required geometric phases. Achromatic and highly dispersive meta-holograms are fabricated to demonstrate the wavefront manipulation with high resolution. This technique could be viable for various practical holographic applications and flat achromatic devices.
SOURCES- Nanoletters
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New Hearable Wearables predicted to
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Samsung just introduced hearable wearables devices will at least get a mass-market introduction.
Hearables will help people of normal hearing by enhancing their ability to hear in the presence of noise.
WiFore Consulting predicts that hearables will be the fastest growing wearable market, exploding upward to over $16 billion by 2020. The reason is that hearing is perhaps the most important sense — even more than vision. Ask any videographer and they will confirm that a good audio track trumps the video track, which users will forgive for glitches if the audio track is pristine.
The Dash, $299 made by Bragi —a $3 million Kickstarter) won last year's CES Best Innovation Award, but has only become widely available this year.
The Dash uses balanced armature speakers, which don't push air—the same kind used in hearing aids. However, unlike your garden variety hearing aid, which lacks adequate bass when listening to music over Bluetooth, Knowles balanced armature speakers aim to outperform conventional air-pushing moving-coil "cone" speakers
SOURCE - EETIMES, BRAGI
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Skin-Like Oxide Thin-Film Transistors for Transparent Displays
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With the advent of the Internet of Things (IoT) era, strong demand has grown for wearable and transparent displays
CREDIT KAIST Advance Materials - Skin-Like Oxide Thin-Film Transistors for Transparent Displays
that can be applied to various fields such as augmented reality (AR) and skin-like thin flexible devices. However, previous flexible transparent displays have posed real challenges to overcome, which are, among others, poor transparency and low electrical performance. To improve the transparency and performance, past research efforts have tried to use inorganic-based electronics, but the fundamental thermal instabilities of plastic substrates have hampered the high temperature process, an essential step necessary for the fabrication of high performance electronic devices.
As a solution to this problem, a research team led by Professors Keon Jae Lee and Sang-Hee Ko Park of the Department of Materials Science and Engineering at the Korea Advanced Institute of Science and Technology (KAIST) has developed ultrathin and transparent oxide thin-film transistors (TFT) for an active-matrix backplane of a flexible display by using the inorganic-based laser lift-off (ILLO) method. Professor Lee's team previously demonstrated the ILLO technology for energy-harvesting
This image shows ultrathin, flexible, and transparent oxide thin-film transistors produced via the ILLO process.CREDIT KAIST Advance Materials - Skin-Like Oxide Thin-Film Transistors for Transparent Displays
The research team fabricated a high-performance oxide TFT array on top of a sacrificial laser-reactive substrate. After laser irradiation from the backside of the substrate, only the oxide TFT arrays were separated from the sacrificial substrate as a result of reaction between laser and laser-reactive layer, and then subsequently transferred onto ultrathin plastics (4μm thickness). Finally, the transferred ultrathin-oxide driving circuit for the flexible display was attached conformally to the surface of human skin to demonstrate the possibility of the wearable application. The attached oxide TFTs showed high optical transparency of 83% and mobility of 40 cm^2 V^(-1) s^(-1) even under several cycles of severe bending tests.
Professor Lee said, "By using our ILLO process, the technological barriers for high performance transparent flexible displays have been overcome at a relatively low cost by removing expensive polyimide substrates. Moreover, the high-quality oxide semiconductor can be easily transferred onto skin-like or any flexible substrate for wearable application."
AbstractFlexible transparent display is a promising candidate to visually communicate with each other in the future Internet of Things era. The flexible oxide thin-film transistors (TFTs) have attracted attention as a component for transparent display by its high performance and high transparency. The critical issue of flexible oxide TFTs for practical display applications, however, is the realization on transparent and flexible substrate without any damage and characteristic degradation. Here, the ultrathin, flexible, and transparent oxide TFTs for skin-like displays are demonstrated on an ultrathin flexible substrate using an inorganic-based laser liftoff process. In this way, skin-like ultrathin oxide TFTs are conformally attached onto various fabrics and human skin surface without any structural damage. Ultrathin flexible transparent oxide TFTs show high optical transparency of 83% and mobility of 40 cm2 V−1 s−1. The skin-like oxide TFTs show reliable performance under the electrical/optical stress tests and mechanical bending tests due to advanced device materials and systematic mechanical designs. Moreover, skin-like oxide logic inverter circuits composed of n-channel metal oxide semiconductor TFTs on ultrathin, transparent polyethylene terephthalate film have been realized.
SOURCES - Eurekalert, Advanced Materials
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Thursday, July 28, 2016
kingofcouture: DIOR par Raf Simons | Cruise 2016
exercicedestyle: Danakil Depression, Ethiopia by CHRIS JOHNS
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Danakil Depression, Ethiopia by CHRIS JOHNS
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helloworlditsjared: Kianna Stupakoff (Next LA) // Los Angeles,...
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Kianna Stupakoff (Next LA) // Los Angeles, CA
Shot by Jared Thomas Kocka
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blackfitnessrocks: blackgrlsaremagic: @rhoseflora Beautifu...
Wednesday, July 27, 2016
...ulf
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| wenchuan earthquake memorial museum |
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Monday, July 25, 2016
New super aircraft cannot land or recover aircraft for four days without failing and fixing this would require a redesign
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According to a June 28 memo, Michael Gilmore, the Defense Department's director of operational test and evaluation,
;said the most expensive warship in history [the new Gerald Ford aircraft carrier] continues to struggle launching and recovering aircraft, moving onboard munitions, conducting air traffic control and with ship self-defense.
"These four systems affect major areas of flight operations," Gilmore wrote in his report to Pentagon and Navy weapons buyers Frank Kendall and Sean Stackley. "Unless these issues are resolved ... they will significantly limit CVN-78's ability to conduct combat operations.
Fixing these problems would likely require redesigning the carrier's aircraft launch and recovery systems, according to Gilmore, a process that could result in another delay for a ship that was expected to join the fleet in September 2014.
Commanders said delays to the USS Gerald R. Ford have resulted in extended deployments for the operational carriers in order for the Navy to meet its commitments around the world, placing additional stress on sailors and crew members.
The report comes just days after the Navy announced the Ford will not be delivered before November 2016 due to unspecified testing issues, walking back testimony from April in which Stackley told Congress the Ford would be ready by September.
Now that delivery date could be pushed to 2017, according to the Navy.
To date, construction on the Ford is 98 percent complete with 88 percent of the test program finished.
Despite delays to the USS Gerald R. Ford's delivery, the Navy says that the Ford-class carriers will yield a $4 billion reduction per ship cost as compared to its predecessor, the Nimitz Class.
The next carrier in the Ford class, the USS John F. Kennedy (CVN 79), is scheduled to launch in 2020. That ship was 18% percent complete as of March.
Arresting GearThe Navy estimates the arresting gear could be operated for approximately 25 consecutive landings, or cycles, between critical failures. That means it has a “negligible probability of completing” a 4-day surge “without an operational mission failure,” Gilmore wrote.
The electro-magnetic launch system’s reliability is higher but “nonetheless I have concerns,” Gilmore wrote. Recent Navy data indicates the carrier can conduct only 400 launches between critical failures, “well below the requirement” of 4,166 takeoffs, Gilmore wrote.
Gilmore said the system would have to increase its reliability to 1,600 launches between critical failures “to have a 90 percent chance of completing a day of sustained operations.” The Navy program office’s determined that the carrier “has less than a 7 percent chance of completing the four-day combat surge” plan, Gilmore wrote.
The current MK 7 hydraulic arresting system outfitted on the ten Nimitz-class aircraft carriers will be replaced on the Gerald Ford-class carriers by the Advanced Arresting Gear (AAG)unit for recovery operations. The AAG is designed for a broader range of aircraft, including UAVs, while reducing manpower and maintenance. Rotary engines which use simple energy-absorbing water turbines (or twisters) coupled to a large induction motor provide finer control of the arresting forces.
Existing water twister systems are fixed in their capacity to absorb energy. For AAG there is a variable energy dissipation by the water twister. There is an actual moving plate inside the water twister that adjusts how much resistance to the water is generated. Initially there was an underestimation of the forces involved inside the water twister because it is a three-dimensional flow field. Internal plates that take the force of the water weren't strong enough and finding a solution has taken some time
In 2016 the Office of the Inspector General, U.S. Department of Defense found that the AAG remained unproven.
SOURCES - Bloomberg, Wikipedia
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The new US aircraft carrier and its planned F-35 fighter will both not be truly combat ready until after 2020
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The F-35 fighter plane will not truly be combat ready until 2022 and the aircraft carrier where the navy's F-35 would launch from will also not be combat ready until a redesigned launching and recovery system is built and installed. The current recovery system will likely break after 25 consecutive landings. High likelihood of failure for landing within 1 day and for launching within 4 days.
An independent watchdog group is saying that the long list of unresolved problems means that the F-35 won’t be ready for combat until 2022.The watchdog group, the well-respected Project on Government Oversight, is basing its analysis on a recent Department of Defense report that found numerous serious problems with the fifth-generation fighter.
The watchdog analysis comes after one of the three F-35 variants has already been declared combat ready. The F-35B, designed for the Marines, was declared ready to go in July 2015. However, the jet has not been used by the Marines in combat, despite plentiful opportunities in Syria and Iraq. And the Project on Government Oversight maintains that the declaration was premature, and that official testing proves that the jet is not ready for active duty. Some analysts have speculated that the Pentagon is trying to buy hundreds of planes before testing has been completed.
Aircraft carrier failing at key tasks of launching and recovering planes and reloading weapons According to a June 28 memo, Michael Gilmore, the Defense Department's director of operational test and evaluation,;said the most expensive warship in history [the new Gerald Ford aircraft carrier] continues to struggle launching and recovering aircraft, moving onboard munitions, conducting air traffic control and with ship self-defense.
"These four systems affect major areas of flight operations," Gilmore wrote in his report to Pentagon and Navy weapons buyers Frank Kendall and Sean Stackley. "Unless these issues are resolved ... they will significantly limit CVN-78's ability to conduct combat operations.
Fixing these problems would likely require redesigning the carrier's aircraft launch and recovery systems, according to Gilmore, a process that could result in another delay for a ship that was expected to join the fleet in September 2014.
The F-35 has cost taxpayers over $400 billion to date Arresting GearThe Navy estimates the arresting gear could be operated for approximately 25 consecutive landings, or cycles, between critical failures. That means it has a “negligible probability of completing” a 4-day surge “without an operational mission failure,” Gilmore wrote.
The electro-magnetic launch system’s reliability is higher but “nonetheless I have concerns,” Gilmore wrote. Recent Navy data indicates the carrier can conduct only 400 launches between critical failures, “well below the requirement” of 4,166 takeoffs, Gilmore wrote.
Gilmore said the system would have to increase its reliability to 1,600 launches between critical failures “to have a 90 percent chance of completing a day of sustained operations.” The Navy program office’s determined that the carrier “has less than a 7 percent chance of completing the four-day combat surge” plan, Gilmore wrote.
The Ford carrier has cost taxpayers over $20 billion so far ($5 for research, almost $15 billion for the first one and $4 billion or so for start of construction on the second.)
The current MK 7 hydraulic arresting system outfitted on the ten Nimitz-class aircraft carriers will be replaced on the Gerald Ford-class carriers by the Advanced Arresting Gear (AAG)unit for recovery operations. The AAG is designed for a broader range of aircraft, including UAVs, while reducing manpower and maintenance. Rotary engines which use simple energy-absorbing water turbines (or twisters) coupled to a large induction motor provide finer control of the arresting forces.
SOURCES- Bloomberg, Financial Times, Wikipedia
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Nanog Gene Reverses Aging in Adult Stem Cells
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The ability to reverse aging may reside in a stem cell gene named Nanog. In a series of experiments at the University at Buffalo, the gene kicked into action dormant cellular processes that are key to maintaining healthy bones, arteries and other telltale signs of growing old. The findings, published June 29 in the journal […]
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The ability to reverse aging may reside in a stem cell gene named Nanog. In a series of experiments at the University at Buffalo, the gene kicked into action dormant cellular processes that are key to maintaining healthy bones, arteries and other telltale signs of growing old. The findings, published June 29 in the journal […]
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Stem cell injections reduce scarring during bypass surgery and possibly increase survival of patients with surgery
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11 patients were injected with stem cells during bypass
surgery. The stem cells injected into their hearts caused a 40% reduction in the size of scarred tissue. Such scarring occurs during a cardiac event such as a heart attack, and can increase the chances of further heart failure. The scarring was previously thought to be permanent and irreversible.
At the time of treatment, the patients were suffering heart failure and had a very high (70%) annual mortality rate. But 36 months after receiving the stem cell treatment all are still alive, and none have suffered a further cardiac event such as a heart attack or stroke, or had any readmissions for cardiac-related reasons.
Twenty-four months after participants were injected with the stem cell treatment there was a 30% improvement in heart function, 40% reduction in scar size, and 70% improvement in quality of life, as judged by the Minnesota living with heart failure (MLHF) score.
Journal of Cardiovascular Translational Research - Implantation of a Novel Allogeneic Mesenchymal Precursor Cell Type in Patients with Ischemic Cardiomyopathy Undergoing Coronary Artery Bypass Grafting: an Open Label Phase IIa TrialHeart failure is a life-limiting condition affecting over 40 million patients worldwide. Ischemic cardiomyopathy (ICM) is the most common cause. This study investigates in situ cardiac regeneration utilizing precision delivery of a novel mesenchymal precursor cell type (iMP) during coronary artery bypass surgery (CABG) in patients with ischemic cardiomyopathy (LVEF less than 40 %). The phase IIa safety study was designed to enroll 11 patients. Preoperative scintigraphy imaging (SPECT) was used to identify hibernating myocardium not suitable for conventional myocardial revascularization for iMP implantation. iMP cells were implanted intramyocardially in predefined viable peri-infarct areas that showed poor perfusion, which could not be grafted due to poor target vessel quality. Postoperatively, SPECT was then used to identify changes in scar area. Intramyocardial implantation of iMP cells with CABG was safe with preliminary evidence of efficacy of improved myocardial contractility and perfusion of nonrevascularized territories resulting in a significant reduction in left ventricular scar area at 12 months after treatment. Clinical improvement was associated with a significant improvement in quality of life at 6 months posttreatment in all patients. The results suggest the potential for in situ myocardial regeneration in ischemic heart failure by delivery of iMP cells.
SOURCES - Guardian UK, Journal of Cardiovascular Translational Research
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Saturday, July 23, 2016
nn saprei dire perché ma la burocrazia intesa come documenti da...
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nn saprei dire perché ma la burocrazia intesa come documenti da ordinare compilare archiviare e poi buttare nn mi ha mai infastidita. forse per via di questo sticazzi che mi porto dentro
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Friday, July 22, 2016
Thursday, July 21, 2016
Scientists cut ‘Gordian knot’ in human genome
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A team of researchers co-led by Erez Lieberman Aiden of Rice University and Baylor College of
Medicine has discovered how mysterious, inactive genes in females hold sway over the superloops that connect DNA sequences at opposite ends of the chromosome.
The work by Aiden and colleagues at Florida State University and the Broad Institute of MIT and Harvard University sheds light on female development in mammals
Females have two X chromosomes in each of their cells. Fully unfolded, each copy is 2 inches long. One of these two X chromosomes is inactive — its genes are turned off. This copy folds into a structure called the Barr body, a mysterious configuration that was discovered in 1949.
Recently, scientists have shown that the Barr body contains massive superloops that bring DNA sequences at opposite ends of the chromosome together inside the nucleus of a cell.
The researchers determined which part of the DNA code is responsible for these superloops and have shown that it is possible to use this information to change the structure of the Barr body as a whole.
The Hi-C method measures how frequently two loci in the genome make physical contact in the nucleus of the cell. Here, a Hi-C contact map is rendered as a three-dimensional surface. Strong proximity between nearby genomic loci creates a ‘wall’ bisecting the landscape. Peaks in the contact map correspond to loops in the genome. Courtesy of Ido Machol and Erez Lieberman Aiden. Rendered by Ido Machol PNAS - Deletion of DXZ4 on the human inactive X chromosome alters higher-order genome architecture“X inactivation is fundamentally important for female development,” said Miriam Huntley, co-first author on the study. “Without it, females would generate too much of every gene product of the X chromosome.”
SignificanceIn human females, one of the two X chromosomes is inactive (Xi) and adopts an unusual 3D conformation. The Xi chromosome contains superloops, large chromatin loops that are often anchored at the macrosatellite repeat DXZ4, and is partitioned into two large intervals, called superdomains, whose boundary lies at DXZ4. Here, we use spatial proximity mapping, microscopy, and genome editing to study the Xi. We find that superloops and superdomains are conserved across humans, macaque, and mouse. By mapping proximity between three or more loci, we show that superloops tend to occur simultaneously. Deletion of DXZ4 from the human Xi disrupts superloops, eliminates superdomains, and alters chromatin modifications. Finally, we show that a model in which CCCTC-binding factor (CTCF) and cohesin extrude chromatin can explain the formation of superloops and superdomains.
AbstractDuring interphase, the inactive X chromosome (Xi) is largely transcriptionally silent and adopts an unusual 3D configuration known as the “Barr body.” Despite the importance of X chromosome inactivation, little is known about this 3D conformation. We recently showed that in humans the Xi chromosome exhibits three structural features, two of which are not shared by other chromosomes. First, like the chromosomes of many species, Xi forms compartments. Second, Xi is partitioned into two huge intervals, called “superdomains,” such that pairs of loci in the same superdomain tend to colocalize. The boundary between the superdomains lies near DXZ4, a macrosatellite repeat whose Xi allele extensively binds the protein CCCTC-binding factor. Third, Xi exhibits extremely large loops, up to 77 megabases long, called “superloops.” DXZ4 lies at the anchor of several superloops. Here, we combine 3D mapping, microscopy, and genome editing to study the structure of Xi, focusing on the role of DXZ4. We show that superloops and superdomains are conserved across eutherian mammals. By analyzing ligation events involving three or more loci, we demonstrate that DXZ4 and other superloop anchors tend to colocate simultaneously. Finally, we show that deleting DXZ4 on Xi leads to the disappearance of superdomains and superloops, changes in compartmentalization patterns, and changes in the distribution of chromatin marks. Thus, DXZ4 is essential for proper Xi packaging.
SOURCES- Rice university, Proceedings of national academy of science
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Wednesday, July 20, 2016
Room-temperature qubit breakthrough for quantum computing
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Material made from the ashes of mothball ingredient naphthalene shows quantum potential.
We are one step closer to a true quantum computer following a breakthrough which researchers say will allow qubits to be used at room-temperature.
One of the practical challenges of quantum computing has been the requirement to cool the quantum bits (qubits) to incredibly low temperatures, close to absolute zero and comparable to the temperature of space.
This super-cooling is necessary so that the quantum states of the qubit’s components remain ‘coherent’ and can perform computations.
University of Sydney’s Dr Mohammad Choucair, together with a team of researchers from Switzerland and Germany, has made a conducting carbon material and demonstrated its potential to perform quantum computing at real-world temperatures. It can also integrate into silicon, the chosen material of Sydney’s Centre for Quantum Computation and Communication Technology (CQC2T) own bid to build a quantum computer.
Carbon nanosphere SEM, Scanning electron microscope images, of the CNSs, Carbon nanospheres. (a) and (b) of the CNSs at low magnification, and (c) and (d) at higher magnification, with (c) being from a region in (b). Scale barsrepresent in (a) 5 µm, (b) 1 µm, (c) 200 nm, and (d) 200 nm. SEM images show an extensive formation of carbon nanoparticles spanning micron scales. Nature Communications - Room temperature manipulation of long lifetime spins in metallic-like carbon nanospheresThe material is made of the ashes from burning naphthalene, a chemical commonly found in moth balls.
“We have made quantum computing more accessible,” said Choucair. “This work demonstrates the simple ad-hoc preparation of carbon-based quantum bits.
“Chemistry gives us the power to create nanomaterials on-demand that could form the basis of technologies like quantum computers and spintronics, combining to make more efficient and powerful machines.”
Choucair’s paper, Room temperature manipulation of long lifetime spins in metallic-like carbon nanospheres, was published online on Nature Communications this evening.
He said he believed the discovery would help bring forward ‘practical quantum computing’ to ‘within a few years’.
AbstractThe time-window for processing electron spin information (spintronics) in solid-state quantum electronic devices is determined by the spin–lattice and spin–spin relaxation times of electrons. Minimizing the effects of spin–orbit coupling and the local magnetic contributions of neighbouring atoms on spin–lattice and spin–spin relaxation times at room temperature remain substantial challenges to practical spintronics. Here we report conduction electron spin–lattice and spin–spin relaxation times of 175 ns at 300 K in 37±7 nm carbon spheres, which is remarkably long for any conducting solid-state material of comparable size. Following the observation of spin polarization by electron spin resonance, we control the quantum state of the electron spin by applying short bursts of an oscillating magnetic field and observe coherent oscillations of the spin state. These results demonstrate the feasibility of operating electron spins in conducting carbon nanospheres as quantum bits at room temperature
15 pages of supplemental materialSOURCES- Australia CIO, Nature Communications
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