Designing a test of neutrinos as dark matter candidates

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center_img Citation: Designing a test of neutrinos as dark matter candidates (2008, January 11) retrieved 18 August 2019 from https://phys.org/news/2008-01-neutrinos-dark-candidates.html Explore furtherlast_img

Intels singlechip cloud computer

Posted on August 31, 2019Categories pjgcjovxTags , , , , , , , , , , ,   Leave a comment on Intels singlechip cloud computer

first_img This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. (PhysOrg.com) — Intel Labs has recently shown off a 48-core prototype chip it calls a “single-chip cloud computer” or SCC. AMD Planning 16-Core Server Chip For 2011 Release Explore further Citation: Intel’s single-chip cloud computer (2010, February 11) retrieved 18 August 2019 from https://phys.org/news/2010-02-intel-single-chip-cloud.htmlcenter_img © 2010 PhysOrg.com Single Chip Cloud Computer has 48 Intel cores and runs at as low as 25 watts. Chief technology officer with Intel, Justin Rattner, said the chip comprises 1.3-billion transistors arranged in a network of 24 tiles, each of which has two Pentium-class IA-32 cores, two L2 caches, plus a router to enable communications between cores. The system uses new software applications to control the power consumed by the cores, and to rapidly transfer data between the cores. This means data can go directly between cores without needing to go via the main memory, and this cuts the data transfer speed by 15 times. The software prevents the data being corrupted by instructing the cache sending the data to delete its copy after it is sent, and the receiving cache to delete old copies of the data before receiving the new. The software controlling power consumption allows application developers, rather than the operating system, to decide how power consumed by the cores is controlled. The tiles can all be independently controlled, which means the power consumption on some cores can be reduced to as low as 25 watts, while others can be up to 125 watts. While some developers are not yet sure what they will do with the feature, many are interested in learning more.Intel’s director of advanced microprocessor research, Nitin Borkar, said tasks could be programmed to run at greater power efficiency rather than higher power if appropriate, or individual cores could be throttled back after they have finished their computations. This would give the system the “compute on demand” feature of traditional data centers.Intel Labs are forming partnerships with industry and university researchers and producing 100 of the chips to enable research to refine the chip architecture and maximize its usefulness.The chip was unveiled at the IEEE International Solid-State Circuits Conference in San Francisco on 8 February.last_img read more

Suburban pocket airports proposed

Posted on August 31, 2019Categories gkdecinrTags , , , , , , , , , , ,   Leave a comment on Suburban pocket airports proposed

first_img Explore further (PhysOrg.com) — A proposal has been put forward by the CAFE foundation that a network of small suburban airports should be developed in the future for the use of Suburban Air Vehicles. Citation: Suburban ‘pocket airports’ proposed (2010, December 20) retrieved 18 August 2019 from https://phys.org/news/2010-12-suburban-pocket-airports.html An idealized pocket airport. Aircraft depicted are motor-gliders that have 50 foot wingspan. Image credit: CAFE Comparative Aircraft Flight Efficiency (CAFE) is a light-aircraft partner of NASA, and is running a US$1.65 million competition, the Green Flight Challenge, to find the best design for a short take-off personal aircraft that uses little fossil fuel, is cheap to run, and is quiet in operation. The competition will be judged in Santa Rosa, California in July 2011.CAFE envisages that Suburban Air Vehicles (SAVs) will become a common mode of transport in the future, with flights landing and taking off at small suburban “pocket airports.” (PDF) CAFE’s president, Dr. Brien Seeley, speaking at the Future of Electric Vehicles conference in San Jose, California earlier this month, said it was shocking that after a century of flight aviation has still failed to fulfill the dream of moving people fast, without needing roads.Dr. Seeley said the travel on the ground to and from airports often negated the time saved by flying, but having pocket airports to fly travelers to the main city airport from tiny suburban airports would considerably speed up the process. Passengers would fly in two to four-person SAVs operated (on autopilot) by air taxis or shuttle services. (Read: Puffin: the one-person electric aircraft (w/ Video)) This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. The Green Flight Challenge is NASA’s first step in developing a new infrastructure for aviation, featuring small auto-piloted aircraft. Challenge vehicles will need to operate safely and achieve at least 1.18 L/100 km fuel consumption. They will have a take-off distance of no more than 610 meters to clear a 15-meter obstacle, travel at 160 kph, and emit less than 78 decibels measured from 76 meters away. Each SAV would be equipped with parachutes. Dr. Seeley said he envisaged vehicles would be designed in future that did considerably better than the minimum requirements.Dr. Seeley said the SAV would offer pilots fast travel with a de-conflicted air highway through the sky taking them directly where they wanted to go. Flight paths would be coordinated via a central control system to avoid collisions. Dr. Seeley said the system would allow people to travel in 3-D instead of on the “insanity” of increasingly congested roads.CAFE has designs for a range of pocket airports, ranging from a 2-acre (0.8-hectare) single runway located in greenbelts just outside major urban areas and handling up to 120 operations an hour, up to a 12-acre (4.8-hectare) version with two sets of runways and parking for 320 ground vehicles. Flights would begin with a steep take-off to ensure the noise level was low enough by the time the SAVs reach the boundary.The Green Flight Challenge is expected to be followed by further competitions in 2013 and 2015, with higher prizes for the winner of each. The Green Flight Challenge sprang from the Personal Air Vehicle Challenge of 2007. © 2010 PhysOrg.com Puffin: the one-person electric aircraft (w/ Video)last_img read more

Fujifilm will introduce 1TB optical disc in 2015

Posted on August 31, 2019Categories wdymosaeTags , , , , , , , , , ,   Leave a comment on Fujifilm will introduce 1TB optical disc in 2015

first_imgThe structure of the two-photon absorption material (left) and the variation of the convex shape depending on the irradiation time of a laser light (right). Credit: TechOn! This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Citation: Fujifilm will introduce 1TB optical disc in 2015 (2012, November 18) retrieved 18 August 2019 from https://phys.org/news/2012-11-fujifilm-1tb-optical-disc.html More information: www.fujifilm.com/about/researc … /ff_rd056_005_en.pdf techon.nikkeibp.co.jp/english/ … 20121113/250732/?P=2 © 2012 Phys.org Explore further (Phys.org)—Fujifilm is working on a new recording method for optical discs. It has developed the new method through the use of two-photon absorption in order to generate heat, and the report in TechOn! notes that this two-photon method is suited for multilayer discs. As the reaction caused by two-photon absorption can be limited to the small area of the focal point of a laser light, it is possible to increase the number of recording layers. The nuance is that Fujifilm has combined a two-photon absorption method with a “heat-mode recording” method. The latter refers to technology that makes the most of a phenomenon where a change is caused by applying a laser light with a high energy density to instantaneously increase the temperature of a minute area of a recording material. Two-photon absorption refers to the simultaneous absorption of two photons of identical or different frequencies to excite a molecule from one state to a higher energy electronic state. According to Fujifilm, the procedure can bring about a recording density of 25 Gbytes per layer, the equivalent to the recording density of a Blu-ray Disc (BD), in addition to 20 layers per side of a disc. A double-sided optical disc with a 1TB storage capacity is possible. Fujifilm foresees bringing a 1TB optical disc to market in 2015. Fujifilm simplified the manufacturing process by using “web coating” to form the recording, ultraviolet curable resin and adhesive material layers and sticking them together. With BD, spin coating and sputtering are needed for each layer.”It takes 147 seconds to form a four-layer BD,” the company said. “With our method, it takes only 58 seconds to form eight layers.”Overall, Fujifilm said that the new disc’s manufacture will be cheaper than BD discs currently available. The two-photon absorption disc has a cost as low as that of a magnetic tape. A company spokesperson said that, “We will continue the development of the disc with help from drive makers.”This new recording method potentially will realize a 15-Tbyte disc. “In the future, it will be possible to realize a 15-Tbyte optical disc (25 Gbytes/layer x 3 (eight values) x 100 layers x 2 (two sides),” Fujifilm said.Fujifilm was scheduled to discuss its latest results at the International Broadcast Equipment Exhibition 2012 in Chiba Prefecture, Japan, which wound down over the weekend. This year’s event was described as focusing on “the next technological innovations beyond digitalization.” Fujifilm Introduces DVD+R Double Layer Media; New Technology Doubles Existing DVD Recording Capacity to 8.5 GBlast_img read more

Covalent postassembly modification cascade of selfassembled supramolecular structures

Posted on August 31, 2019Categories cryfsvynTags , , , , , , , , , , ,   Leave a comment on Covalent postassembly modification cascade of selfassembled supramolecular structures

first_img © 2017 Phys.org Explore further Inspired by natural signaling cascades, chemists have developed synthetic cascades that modify a self-assembled supramolecular structures post-assembly. Researchers from the University of Cambridge have developed a synthetic cascade that is triggered by norbornadiene (NBD) and relayed by a cyclopentadiene (CPD) intermediate resulting in the triggered change of two supramolecular structures. Their work appears in Nature Chemistry.After a one-pot self-assembly of two supramolecular structures, the Nitschke group developed a post-assembly modification (PAM) technique via a covalent signal cascade. PAM reactions are limited by the need to be sufficiently mild that they do not damage the supramolecular structure. They also need to be chemoselective and produce product in near-quantitative yields to eliminate the need for extensive purification and isolation. Diels-Alder reactions are good candidates for these types of reactions.Pilgram, et al. developed a system that underwent inverse-electron demand Diels-Alder (IEDDA) reaction with the initial triggering molecule, NBD, and a tetrazine-edged FeII8L12 cube, and subsequent Diels-Alder reaction with the relay molecule, CPD, and a tetrahedral complex. Their studies verified that the reactions required the triggering molecule and the relay molecule in order to work.Specifically, the synthetic scheme involved first making the terazine-edged cube in a one-pot synthesis. It then underwent the IEDDA reaction between the tetrazines and the NBD trigger molecule. After conducting model reaction tests, they used 2-octadecylnorbornadiene giving a pyridizine-edged cube and a 1-octadecylcyclopentadiene intermediate. This intermediate served as a relay molecule that bound to the maleimides on the tetrahedral complex via a Diels-Alder reaction.In one test, the final reaction involved forming a CPD intermediates with sufficiently long alkyl chains that the tetrahedral product transfers from an organic polar phase to a non-polar phase. Notably, without the initial triggering molecule, the final product is not formed and does not move into the non-polar phase, thus demonstrating a synthetic signal cascade in which a molecule changes lipophilicity as a result of an environmental trigger.Additionally, because the cell’s signal transduction pathways are often regulated by both triggering species as well as inhibitors, the Nitschke group investigated potential inhibitor molecules to their synthetic cascade. They found that cyclooctyne served as a good inhibitor by competitively reacting with the terazine molecules over the NBD trigger.Finally, another key finding of their synthetic cascade is that when the tetrahedral structure is complexed with an anionic guest (PF6-), the guest remains intact even after post-assembly modification of the structure. This allows the guest molecule to be transported from the polar to non-polar phase, which has implications for medicinal and other applications where molecule delivery is hindered by polarity or other environmental features.Dr. Nitschke told PhysOrg that future research includes designing cascades of reactions that are capable of being pushed backwards under out-of-equilibrium conditions. According to Nitschke, “Cascades of out-of-equilibrium reactions that are geared together such that one sequence of reactions either up-regulates or down-regulates another are fundamental building blocks of life. Understanding how they might work could help us understand prebiotic chemistry, as well as help us design complex synthetic assembly lines where substrates are passed along between capsules that chemically modify them.” More information: Ben S. Pilgrim et al. Signal transduction in a covalent post-assembly modification cascade, Nature Chemistry (2017). DOI: 10.1038/nchem.2839AbstractNatural reaction cascades control the movement of biomolecules between cellular compartments. Inspired by these systems, we report a synthetic reaction cascade employing post-assembly modification reactions to direct the partitioning of supramolecular complexes between phases. The system is composed of a self-assembled tetrazine-edged FeII8L12 cube and a maleimide-functionalized FeII4L6 tetrahedron. Norbornadiene (NBD) functions as the stimulus that triggers the cascade, beginning with the inverse-electron-demand Diels–Alder reaction of NBD with the tetrazine moieties of the cube. This reaction generates cyclopentadiene as a transient by-product, acting as a relay signal that subsequently undergoes a Diels–Alder reaction with the maleimide-functionalized tetrahedron. Cyclooctyne can selectively inhibit the cascade by outcompeting NBD as the initial trigger. Initiating the cascade with 2-octadecyl NBD leads to selective alkylation of the tetrahedron upon cascade completion. The increased lipophilicity of the C18-tagged tetrahedron drives this complex into a non-polar phase, allowing its isolation from the initially inseparable mixture of complexes. (Phys.org)—Within the cell chemical messages are passed through a signaling cascade. This cascade can be a series of chemical reactions or molecular changes that spurn the next reaction in a kind of assembly line process. This is how the cell responds to its environment and how communication happens over (biochemically ) long distances. Chemists build new chemical structures on unreactive bondscenter_img Citation: Covalent post-assembly modification cascade of self-assembled supramolecular structures (2017, September 6) retrieved 18 August 2019 from https://phys.org/news/2017-09-covalent-post-assembly-modification-cascade-self-assembled.html Depictions (same scale) of the X-ray crystal structures. a, Cube 1b. b, PF6 − adduct of tetrahedron 3. c, AsF6 − adduct of modified tetrahedron 4a. Atom colours: grey, C; white, H; red, O; blue, N; orange, Fe; light green, F. Disorder and non-encapsulated anions are omitted for clarity. Iron atoms are connected with orange lines to illustrate the overall geometry of each complex. Credit: (c) Nature Chemistry (2017). DOI: 10.1038/nchem.2839 Journal information: Nature Chemistry This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Wheat gluten found to restore bonds in brittle human hair

Posted on August 31, 2019Categories bfymlamyTags , , , , , , , , , , ,   Leave a comment on Wheat gluten found to restore bonds in brittle human hair

first_img This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. More information: Modification of wheat gluten for improvement of binding capacity with keratin in hair, Royal Society Open Science (2018). Published 7 February 2018.DOI: 10.1098/rsos.171216 , https://sp2.img.hsyaolu.com.cn/wp-shlf1314/2020/IMG9733.jpg” alt=”last_img” />

Sip a martini in the school library

Posted on August 31, 2019Categories lodfkjsaTags , , , , , , , , , ,   Leave a comment on Sip a martini in the school library

first_imgImagine Sipping a Cosmopolitan sitting inside the school library. Or having a pizza in the laboratory. Well, if school spells fun for you and if you are one of those adults who still fantasise about school, heading to Cafe Ludus might just hit the rewind button for you. While concept cafes and restaurants are an age-old concept, this one, with its cafeterias and libraries (complete with shelves and old radios and magazines on hangers) and an open terrace was actually quite interesting. Adding to the quirky factor is the menu card. Every page has some doodle or food-related graphic, making ‘visual’ that much more interesting. However, Cafe Ludus needs to work on the lighting — it is quite dim in most places.   Also Read – ‘Playing Jojo was emotionally exhausting’They have a separate section for an ‘all-day breakfast’, may be for PLUs who combine a lot of meals together and still want to ‘have breakfast’. Hmmmm, now that’s a thought.   The cuisine is mostly comfort and cafe style. So you have your usual pizzas and pastas, paninis and risottos. A lot of the dishes have been given Greek names to go with the concept. However, ordering will not be a tall task because the menu clearly specifies what each dish is made of. Also Read – Leslie doing new comedy special with NetflixThe food here is good. I liked most dishes that I ordered so I will suggest that you can take your pick according to your preferences when you visit. The portions are good and can be shared by 2-3 people. The lack of an alcohol license is a spoiler but that should be in place soon. Till then, enjoy the mocktails. Hey pssst! Do visit the washroom before you leave, even if you don’t need to.DETAILAt: Cafe Ludus, 24 & 25, 2nd Floor, MGF Metropolitian Mall, SaketTimings: Noon to 1 amPhone: 9599426426 Meal for Two: Rs 1,800 approxlast_img read more

Celebrating the best of Delhi

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first_imgIt was an enthralling evening to remember and cherish as Delhi’s glitterati came together to celebrate the unveiling of the second edition of coffee table book Delhi Primes: Men serving Mankind at a city hotel to support NGO Lakshyam’s cause.The guests who graced the occasion were actor Unnat Dutt, entrepreneur Bharat Sahni, Lalit Bhasin,  MS Bitta, chairman of All India Anti terrorist front, NGO activist Anshu Gupta, entrepreneur Pawan Jain, photographer Raghu Rai, entrepreneur Tushar Kumar, Life and Business Coach Ramon Llamba to name a few. Also Read – ‘Playing Jojo was emotionally exhausting’The event was a charity fashion show to raise funds in support of Lakshyam’s endeavour to uplift the standard of not so privileged children in Delhi. The coffee table book comprises some 35 odd prominent celebrities like Sandeep Jajodia, Jatin Das, Bharat Sahani, Kapil Dev,  Naresh Trehan, Shivendra Singh, Rohit Bal, Varun Jain, Keshav Suri, Lalit Bhasin, Vikram Baidyanath, Shiv Jatia, Pt. Birju Maharaj, Ravish Kapoor and few other powerful men from Delhi who have carved out a niche of their own and given back to society in an overwhelming manner. Also Read – Leslie doing new comedy special with NetflixFounded by Rashi Anand, the NGO is engaged in a number of social welfare activities in areas like child welfare, education, health, empowerment (women in particular) and promotion of practical, effective and innovative solutions to improve lives of underprivileged communities.The book is a salute to the 35 indomitable spirits who have made a difference to many in shaping up their lives and thoughts. It reflects an urge to excel and pursue one’s dreams even in times of struggle. Delhi Primes also highlights a description of these men whose contributions have led to social change and refinement in the minds of many who all have gathered courage and inspiration from their real-life stories.The book launch was followed by a beautiful act by the underprivileged children of the NGO, celebrating life and displaying the yearning to tread off-the-beaten-track with unflinching grit and determination.last_img read more

Summer days happy plates

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first_imgDoesn’t matter how much it rains, the heat and the humidity in the Capital always returns with a vengeance. After a relatively cool Saturday, Sunday was just that as we headed over to Shangri-La Eros Hotel’s Cafe Uno for a lazy brunch. The one adjective every one can easily associate with brunches is – laziness. The whole process of reaching the venue, choosing your dishes and your drinks must be done with complete disregard for time and haste. Otherwise, be rest assured, all a lavish lunch will be is a hurried lunch. Also Read – ‘Playing Jojo was emotionally exhausting’We took a walk around guided by sous chef Abhinandan Singh as we started off with smoked salmon, prawns, lobster, blackforest ham, salami and yes some very good sushi. All of this to go with the champagne. The coolest thing on offer, besides the cold cuts of course, is a live chaat counter right inside the cafe. So take your pick of gol gappas, raj kachoris and papri chaats if that is what you are craving on a weekend afternoon. And since gol gappas were on offer, could we possibly say no!? The cafe also has various flavours of lassi and chaanch, besides juice, to go with the Indian dishes. Also Read – Leslie doing new comedy special with NetflixIf you the kinds to steer clear off such quirks for a brunch, there is a pasta station and a pizza oven ready for you to customize the dishes to your taste. Cafe Uno offers an interesting mix of continental dishes along with Indian dishes when it comes to the heavier meals. Right from the Hungarian Goulash to the garlic mashed potatoes (topped off with bacon bits -heaven!), jacket potatoes, butter steamed vegetables and a grill where you can pick from prawns, fish and your meats to be cooked to your taste with your choice of sauce. The Indian spread has your papads, dal, paneer, mutton kofta, mutton raan, Hyderabadi fish kebabs and a lot more – clearly they intend to spoil you with options! For dessert they had a wonderful spread of ice creams and some exquisite pastries and you could also get pancakes or waffles made if you want. And yes – the fruits. Somehow for us fresh fruits trump most desserts so we were more than happy with our colourful plates. Rounding it all off with a cup of Darjeeling tea, office work was the last thing on our minds but well then! The cafe serves their brunch from noon to 3:30 pm and here are the rates – Rs 3, 200 plus taxes per person with unlimited champagne, Rs 2, 500 plus taxes per person with unlimited soft beverages and Rs1, 500 plus taxes for the kids buffet. Book your table soon!last_img read more