Tunable quantum cascade laser

first_img Copyright 2010 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. More information: Kazuue Fujita, Tadataka Edamura, Shinichi Furuta, and Masamichi Yamanishi, “High-performance, homogenous broad-gain quantum cascade lasers based on dual-upper-state design,” Applied Physics Letters (2010). Available online: link.aip.org/link/APPLAB/v96/i24/p241107/s1 Explore further (PhysOrg.com) — One of the issues associated with lasers is their tunability. In many cases, if you want to produce a particular wavelength, you have to build a laser to accomplish this. In order to get another wavelength, you may have to build a different laser. A tunable laser would provide an opportunity to adjust the wavelength, without the use of another laser. One novel quantum cascade laser design that could achieve this is based on a dual upper state design. Citation: Tunable quantum cascade laser (2010, July 7) retrieved 18 August 2019 from https://phys.org/news/2010-07-tunable-quantum-cascade-laser.htmlcenter_img A team at the Central Research Laboratory at Hamamatsu Photonics K.K. in Japan has come up with, and tested, a tunable quantum cascade laser design that demonstrates broad optical gain. Their work is published in Applied Physics Letters: “High-performance, homogenous broad-gain quantum cascade lasers based on dual-upper-state design.”“Usually, quantum cascade laser designs have only one upper state, except for superlattice active region,” Kazuue Fujita, the lead author on the paper, tells PhysOrg.com in an email interview. In this case, though, there is an additional upper state added to the design of the laser. “The additional upper state is created by a first quantum well adjacent to the injection barrier. This state corresponds to a lowest energy state in the first quantum well.”Fujita goes on to explain that the regular upper state, seen in most conventional quantum cascade lasers, is designed to be nearly the same energy at operating condition as the state in the first quantum well. “Electrons are injected into the higher upper state via resonant tunneling from the previous injector. And then, electrons populated in the both upper states transit from both upper states to a lower state.” Both of these transitions contribute to optical gain.This new laser design would have a number of advantages over current quantum cascade laser designs insists Fujita. This laser design allows for broadband tuning. On top of that, there is weak dependence on voltage by these lasers, and they are not sensitive to temperature change. “Slow efficiency at threshold is observed to be nearly constant over the wide range. Also I-L characteristics show super-linear behavior. These distinctive features have never been observed in a quantum cascade laser so far,” Fujita explains. “I think this design concept holds large potentialities.”Fujita says that the design has actually been tested. “We have already fabricated and measured many lasers with the design. The lasers demonstrate very good performances. In addition, high temperature, continuous wave operation of the laser has also been achieved.”In terms of application, Fujita sees a great deal of usefulness, especially in terms of spectroscopy. Trace gas sensing is considered one of the more likely applications, since wide tunability is desired. “The external cavity quantum cascade laser with this design may operate very stable due to its low dependences on voltage and temperature,” he says. Due to its tunability, this quantum cascade laser design could also increase the cost efficiency of some applications. “This design can lead to high-performance broadband tuning. Therefore, the laser allows a reduction in the number of lasers in a spectroscopic analysis system.” Compact, wavelength-on-demand Quantum Cascade Laser chip created 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

Selfinflating bike tires campaign for dollars

first_imgPumpTire developers have in mind two end products, one for casual cyclists and the other for cyclists who want high performance. For the latter, The City Pro has a max 100 psi, and the City Cruiser is a 26″ x 1.5″ tire with a maximum 65 psi.In the video showing how it works, the founder of the project, Benjamin Krempel, hops on his bicycle and takes it for a ride. We see the pressure on the tire rising from 22 to 52 psi in over a mile. As for the higher-performance tire product, the user is allowed to set the pressure from 65 to 95 psi.True to the Kickstarter project practice, Krempel and team are posting project details on the Kickstarter site, hoping backers will donate toward their goal, which is $250,000. They want to use that money to work with vendors and engineers to put in place the right materials and processes and to get tools and materials for assembly. The project will only be funded if at least $250,000 is pledged by October 5, according to the site. At the time of this writing, they have $3,619 with 43 backers. As offers to those who pledge, they give those who pledge $75 two Cruiser tires, two valves and two tubes at the expected retail value of $129.90. Those who pledge $45 get one Cruiser tire, (you guessed it). one valve and one tube at the expected retail price of $64.95. Pledges of one dollar or more get the team’s warm thanks for doing a good deed. Explore further (PhysOrg.com) — Bicycle owners are being offered a no-hassle solution to keeping their bicycle tires sidewalk and road-worthy. The solution is called the PumpTire, billed as the world’s first self-inflating bicycle tire. Thanks simply to the rolling motion of the tire, and inventor ingenuity, it can happen. Right now, it’s an advanced prototype, not something to yank off any shelf. PumpTire is promoting this off the Kickstarter project site. The PumpTire team hopes that, with enough donations, they can transform their prototype into products for cyclists everywhere. Citation: Self-inflating bike tires campaign for dollars (2011, August 26) retrieved 18 August 2019 from https://phys.org/news/2011-08-self-inflating-bike-campaign-dollars.html © 2011 PhysOrg.com PumpTire is the company and product name of a set of items that consist of a tire, a tube, and detachable valve. The inner tube clips into the tire to allow the air to pass from the tire to the tube. Once the desired pressure is reached, the pump stops. The valve senses the increase in pressure. and closes the air pathway so that no more air is pumped into the tire. 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. PumpTire prototype takes riders off of pumping grind More information: www.kickstarter.com/projects/8 … flating-bicycle-tirelast_img read more

Uhoh Intel Globalfoundries to fastforward into 14nm

first_img Citation: Uh-oh, Intel. Globalfoundries to fast-forward into 14nm (2012, September 24) retrieved 18 August 2019 from https://phys.org/news/2012-09-uh-oh-intel-globalfoundries-fast-forward-14nm.html © 2012 Phys.org This is a nonplanar architecture optimized for low-power, mobile system-on-chip (SoC) designs. These chips will deliver a 40 percent to 60 percent improvement in battery life compared to two-dimension planar transistors at the 20nm node. Globalfoundries will go “3-D” in the use of three-dimensional “FinFET” transistors. The big deal about “FinFET” rests in its promoted superior low-power attributes. The FinFET architecture takes a traditional two-dimensional transistor design and turns the conductive channel on its side, resulting in a three-dimensional fin structure, surrounded by a gate controlling the flow of current. The 3-D transistor design operates at a lower voltage with minimal current leakage. This leads to a longer battery life for mobile applications and less power consumption for plugged-in applications. The power-consumption advantage could have important implications for networking chips in data centers.Intel’s challenge is not only in the rival company’s technology but also in 14nm timelines. Globalfoundries is speeding up its timeline for its 14nm process. Chip watchers note that in so doing it is playing leapfrog over other companies. The company will be ready to roll with a 14-nanometer process that will include its three-dimensional transistor architecture. This is said to be similar to Intel’s Tri-Gate method. Enthusiasts say that the 14nm-XM design is expected to carry performance and power benefits of three-dimensional FinFET transistors, possibly influencing a newer generation of mobile devices.With the Globalfoundries plan, chip designers will be able to start producing sample 14 nanometer chips in 2013. In 2014 or early 2015, the 14 nm chips will be part of the consumer marketplace. Technology development of the 14nm-XM has begun in Globalfoundries’ Fab 8, a fabrication plant in Saratoga County, New York. The company is making early process design kits (PDKs) which are available now. Customer tape-outs—the final result of the design—are expected in 2013. Globalfoundries was formerly a manufacturing arm of AMD. Headquartered in Milpitas, California, Globalfoundries now counts itself as one of the largest foundries in the world by revenue. Imec releases industry’s first 14nm process development kit More information: www.globalfoundries.com/technology/14XM.aspx Explore further (Phys.org)—Globalfoundries has made an announcement that amounts to a direct challenge to Intel, in the latter’s race to get further ahead in the mobile device ecosystem. Both Globalfoundries and Intel will be racing for a more dominant position with higher performing and power efficient systems for smartphones and other devices. In short, Globalfoundries announced Thursday that it is accelerating its technology roadmap. Its newest design achievement for the mobile market is in the form of 14nm chip technology. The company provided some details about its 14nm-XM (“extreme mobility”) process. 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

Researchers investigate stellar populations in the central region of the Andromeda galaxy

first_imgThe Andromeda galaxy. Credit: Adam Evans. German astronomers have conducted a study of the central bulge of the Andromeda galaxy and analyzed its stellar populations. The research could improve our understanding of the bulge’s structure and formation history. Results of the study are presented in a paper published July 24 on the arXiv pre-print repository. More information: The stellar populations of the central region of M31, arXiv:1807.09284 [astro-ph.GA] arxiv.org/abs/1807.09284AbstractWe continue the analysis of the dataset of our spectroscopic observation campaign of M31, by deriving simple stellar population properties (age metallicity and alpha-elements overabundance) from the measurement of Lick/IDS absorption line indices. We describe their two-dimensional maps taking into account the dust distribution in M31. 80% of the values of our age measurements are larger than 10 Gyr. The central 100 arcsec of M31 are dominated by the stars of the classical bulge of M31. They are old (11-13 Gyr), metal-rich (as high as [Z/H]~0.35 dex) at the center with a negative gradient outwards and enhanced in alpha-elements ([alpha/Fe]~ 0.28+- 0.01 dex). The bar stands out in the metallicity map, where an almost solar value of [Z/H] (~0.02+-0.01 dex) with no gradient is observed along the bar position angle (55.7 deg) out to 600 arcsec from the center. In contrast, no signature of the bar is seen in the age and [alpha/Fe] maps, that are approximately axisymmetric, delivering a mean age and overabundance for the bar and the boxy-peanut bulge of 10-13 Gyr and 0.25-0.27 dex, respectively. The boxy/peanut-bulge has almost solar metallicity (-0.04+- 0.01 dex). The mass-to-light ratio of the three components is approximately constant at M/LV ~ 4.4-4.7 Msol/Lsol. The disk component at larger distances is made of a mixture of stars, as young as 3-4 Gyr, with solar metallicity and smaller M/LV (~3+-0.1 Msol/Lsol). We propose a two-phase formation scenario for the inner region of M31, where most of the stars of the classical bulge come into place together with a proto-disk, where a bar develops and quickly transforms it into a boxy-peanut bulge. Star formation continues in the bulge region, producing stars younger than 10 Gyr, in particular along the bar, enhancing its metallicity. The disk component appears to build up on longer time-scales. Groundbreaking study sheds new light on galaxy evolution © 2018 Phys.org Located some 2.5 million light years away from the Earth, the barred spiral Andromeda galaxy, also known as Messier 31, or M31 for short, is the nearest major galaxy to the Milky Way. Due to its proximity, M31 is an excellent target to study the detailed evolutionary history of large spiral galaxies.Andromeda’s central bulge is crucial for such studies, so recently, a team of researchers from Germany led by Roberto Philip Saglia of the Max Planck Institute for Extraterrestrial Physics in Garching, decided to analyze the stellar populations of this region in detail.For their research, the team used the 2.7 meter telescope at the McDonald Observatory in Texas to obtain spectroscopic data of M31. The observational campaign allowed the astronomers to uncover simple stellar population properties of the central region of this galaxy, including age, metallicity and alpha-elements abundance.”We observed M31 for 14 nights with the integral-field spectrograph VIRUS-W attached to the 2.7m telescope at the McDonald Observatory, Texas, covering the bulge area with a filling factor of 1/3 and sampling the disk along six different directions, reaching approximately one scalelength along the major axis,” the scientists wrote in the paper.According to the study, the stellar populations in the central region of M31 are fairly old—more than 10 billion years old. In comparison, the stars of the galaxy’s disk are younger by 5 to 6 billion years.In particular, the researchers found that the central 100 arcsec of this galaxy is dominated by old, metal-rich stars at the center with a negative gradient outwards and enhanced in alpha elements.The study reveals that M31’s bulge as well as bar have solar metallicities. The team also found that the bar and bulge have a mean age of 10 and 13 billion years respectively.The authors of the paper concluded that their result suggest a two-phase formation scenario for the inner region of M31.”A classical stellar bulge forms together with a primordial disk, from a quasi-monolithic collapse or violent instability of the turbulent inner proto-disk. On larger scales, the proto-disk develops a bar. The bar buckles and transforms the proto-disk into the boxy-peanut B/P bulge. The stars in this region are mainly old,” the researchers concluded.The team plans further studies of M31 that might shed further light on the sequence of events that built the central regions of this galaxy. Moreover, they will try to calculate the rate of microlensing events expected from the self-lensing of the different populations of the central region of the Andromeda galaxy. Explore further 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: Researchers investigate stellar populations in the central region of the Andromeda galaxy (2018, August 6) retrieved 18 August 2019 from https://phys.org/news/2018-08-stellar-populations-central-region-andromeda.htmllast_img read more

Lets pimp the disco

first_imgTell us a bit about yourselves and how did you guys come together as a band?We’ve both been individual musicians for awhile now prior to this collaboration. Saba has been singing with a bunch of other bands as well as working as a professional sessions vocalist and playback singer, and Imaad is the frontman/ guitarist for The Pulp Society, as well as produces solo under the moniker Madboy. Imaad heard Saba’s voice at a late night jam with some friends and immediately knew he had to get her to sing on some of his productions. Also Read – ‘Playing Jojo was emotionally exhausting’And how did the name come about?It’s basically a combination of two solo projects. Madboy is Imaad’s project as a solo producer and Mink is Saba’s moniker as a producer and DJ. So we just thought combining the two would be simple and non-pretentious. Tell us about what drives you guys, what are your influences?Our personal influences are extremely varied and diverse but for this project we are focusing on a sound which is driven by old style Harlem swing and bringing that into context with production that’s rooted in disco and funk. It’s our own trademark sound and it’s hard to explain too much- it’s something that needs to be experienced. Also Read – Leslie doing new comedy special with NetflixTell us a bit about the songs you have planned for this chapter at Raasta?We haven’t been releasing too much of our material online, because we like each of our releases to be really special and when the EP is released, It’s going to be pretty hyped. But in spite of that, a lot of our tunes have been spreading by word of mouth and gigs that have travelled all over the place. Our songs – Pimp the Disco, Taste your kiss, Lemonade (which was our first single release and is on Soundcloud) Trouble, Soulboy etc and many more will all be on the set list. What’s next in the pipeline for you guys?We play Sunburn in Goa which is the last gig for the year for us coming at the end of our first year as ‘Madboy/Mink’ and it’s been a very busy year in terms of gigs. We’re just going to take stock, lock ourselves in the studio for a little while, and complete the final mixes for our EP which will be out most probably by the end of Feb or beginning of March – and will be followed by a comprehensive tour across the country.WHEN: 25 December, 9 pm onwardsWHERE: Raasta, Hauz Khas Villagelast_img read more

Knots and stitches

first_imgThe 29th edition of India Carpet Expo showcases more than 275 reputed manufacturer exporters from all over country like – U.P., Rajasthan, Haryana, Jammu and Kashmir, Punjab, Madhya Pradesh, Himachal Pradesh, Andhra Pradesh etc. A record number of 450 overseas carpet buyers from around 57 countries mainly USA, Germany, France, UK, Turkey, Brazil, China, Canada, Denmark, Japan, Korea, European Union Countries etc shall be visiting the expo to generate business for this rural based cottage sector. Also Read – ‘Playing Jojo was emotionally exhausting’The event is organised by Carpet Export Promotion Council of India (CEPC) setup by Ministry of Textiles government o?f India. CEPC was established to promote the exports of hand-made / hand-knotted carpets and other floor coverings. CEPC therefore, helps in skill enhancement of weavers, artisans, entrepreneurs, strengthening base in existing markets, identifying potential markets, educating about government policies and its compliances, providing financial assistance for brand building of Indian hand-made carpets, through publicity, participating in world renowned trade fairs and expositions.Where: Hall no. 8- 11, Pragati MaidanWhen: March 27 – 30last_img read more

15 dead 10 injured in road accident in AP

first_imgAt least 15 people, including three children, were killed on Saturday and 21 injured when a mini truck carrying a marriage party collided with a bus near Kandukur town in Prakasam district of Andhra Pradesh.Police said a mini truck carrying a marriage party coming from Kandukur hit the bus coming from the opposite direction.Fifteen people have been killed in the mishap after the bus caught fire in the mishap, Inspector of Police (Kandukur) M Lakshman said. Also Read – Punjab on alert after release of excess water from Bhakra damThe mini truck was carrying 40 passengers while there were no passengers on board in the bus. Fire tenders were pressed into service to douse the flames.The officer said the injured are being shifted to Kandukur, Ongole and Nellore districts for treatment. Andhra Pradesh transport minister Sidda Raghava Rao also reached the spot and is supervising the rescue operations.District Collector Sujatha Sarma also visited the mishap site.The deceased were identified as — N Subhasini (31), P Prasad (30), R Subba Rao (50), E Chiranjeevi (45), S Chandu (10), S Adinarayana (10), Srilakha (8), M Padma (40), K Sushela (47), S Venkateswara Rao (40), S Rajamma (40), V Subbaiah (30), V Chinnaya, S Rajayya, and B Hazarataiah.last_img read more

Live better with strawberries

first_imgStrawberries or garden strawberry, commonly known as Fragaria ananassa an edible fruit which is a hybrid species of French and Argentinean varieties, is cultivated across the globe. The fruit is juicy and hence keeps your body rehydrated during summers. Also, it is very useful for cognitive development and gives you a strong vision. 1.Vitamin C in strawberries strengthens the immunity system of the body. The content of vitamin C fights against cough, cold, flu and viral infections. Strawberries contain antioxidants which allow proper functioning of the cells in the body. Vitamin C, itself being an antioxidant, prevents inflammation and free radicals. Also Read – Add new books to your shelf 2. Strawberry consists of an element called alpha-hydroxy acid which acts as a natural scrubber. Thus it can be used as a scrubber to remove the dead skin cells. Also, aspartic acid in strawberry removes the toxins from the skin. So experience complete rejuvenation and get the naturally embraceable glowing skin with strawberries to feel that touch! 3. Blessed with antioxidants, flavonoids, fibre, potassium, vitamin C and folate, strawberry is a great fruit to successfully fight against a variety of heart ailments. These essential nutrients help to lower the levels of bad cholesterol in the body. Flavonoids help to regulate the proper functioning of arteries and prevent blood clotting even. Vitamin C is effective in making the heart muscles strong and efficient. Potassium and magnesium reduce the risk of high blood pressure. So, all the heart patients will surely embrace strawberries with joy!last_img read more

Bhangar project Construction suspended after inconclusive meeting

first_imgKolkata: The construction work for installing a tower at the power grid project in Bhangar has been suspended as the meeting held between the local people and the district administration officials on Friday failed to arrive at a consensual decision.Another meeting would take place on 31 December in this regard. The local residents and the members of the Jami Jibika Bastutantra O Paribesh Rakshya Committee (JJBPRC) refused to allow the construction of the tower unless their demands are met by the district administration. Also Read – Rain batters Kolkata, cripples normal lifeThe meeting was held for nearly five hours on Friday morning but the issue was not resolved. The members of the JJBPRC staged a demonstration at the project site on Thursday, stalling the construction work of the tower. Some of the villagers and committee members alleged that other development projects which were promised by the government earlier have been stalled as well and hence they would not allow the power project to continue. JJBPRC members also alleged that the local administration had assured them that dredging of river would take place and a hospital would be set up but no steps have been taken so far. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedThey also alleged that the district administration had agreed to meet certain demands of them, including the introduction of vocational training for the unemployed youths in the area and also setting up of a cold storage for fishermen and farmers. But nothing has happened, they said. It may be mentioned here that a logjam had been created in the power grid project in Bhangar for sometime as they local people did not want the project to take place. The matter was finally resolved following the intervention of the Power department and administration officials in the district. Chief Minister Mamata Banerjee, during her administrative meeting in the district on Thursday, expressed her dissatisfaction over the non-completion of the power grid project and sought an explanation from the Power department officials as to why the project has not been completed despite the efforts made by the state government in this regard.last_img read more

Sleep well to avoid eating junk food due to job stress

first_imgStress at your job can lead to overeating and intake of junk food at dinnertime, but there could be a buffer to this harmful pattern. New research suggests that a good night’s sleep can serve as a protecting factor between job stress and unhealthy eating in the evening.”We found that employees who have a stressful workday tend to bring their negative feelings from the workplace to the dinner table, as manifested in eating more than usual and opting for more junk food instead of healthy food,” said study co-author Chu-Hsiang Chang, Associate Professor of Psychology at Michigan State University in the US. Also Read – Add new books to your shelfThe research, published online in the Journal of Applied Psychology, involved two studies of 235 workers in China. One study dealt with information technology employees who regularly experienced high workload and felt there was never enough time in the workday. The second study involved call-centre workers who often got stressed from having to deal with rude and demanding customers.In both cases, workday stress was linked to employees’ negative mood while on the job, which in turn was linked to unhealthy eating in the evening, study co-author Yihao Liu, Assistant Professor at the University of Illinois, said. Also Read – Over 2 hours screen time daily will make your kids impulsiveThe study proposed two potential explanations, Liu said.”First, eating is sometimes used as an activity to relieve and regulate one’s negative mood, because individuals instinctively avoid aversive feelings and approach desire feelings,” he said. “Second, unhealthy eating can also be a consequence of diminished self-control. When feeling stressed out by work, individuals usually experience inadequacy in exerting effective control over their cognitions and behaviours to be aligned with personal goals and social norms,” Liu added.The finding that sleep protects against unhealthy eating following workday stress shows how the health behaviours are related, Chang pointed out.”A good night’s sleep can make workers replenished and feel vigorous again, which may make them better able to deal with stress at work the next day and less vulnerable to unhealthy eating,” she said.last_img read more

Commemorating 70 years of Indias independence

first_imgA wide swath of the millennia-old Indian civilization came alive through a cluster of artefacts of astonishing brilliance as the National Museum, recently, began a nearly two-month transcontinental exhibition. The showcase takes the viewers on an intriguing and exhilarating trip of the country’s spectacular past and its links with the outside world since antiquity. ‘India and The World: A History in Nine Stories’, the first of its kind event in India, marks an unprecedented collaboration in museum exhibition with the British Museum, London; National Museum, New Delhi; Chhatrapati Shivaji Maharaj Vastu Sanghahalaya (CSMVS), Mumbai; and some 20 private collections pooling in their resources for the phenomenal show. Also Read – Add new books to your shelfChief Guest Ram Bahadur Rai, President, IGNCA, formally inaugurated the exhibition, unveiling a unique line-up of around 200 ancient and modern exhibits which offer a chronological and thematic depiction of the evolution of India with multiple expressions of art and artefacts, stories and aesthetics. Some of the eye-popping objects on display include the oldest known hand-axe in the world (1.7-1.07 million years) from Attirampakkam, Tamil Nadu, a replica of the dancing girl of Mohenjodaro (2500 BC), a gold-horned Harappan humped bull (1800 BC), a Mughal miniature-inspired work by Rembrandt, an Ashokan edict (250 BC); and an imprint of the Constitution of India having more than 50 paintings supervised by the renowned artist Nandalal Bose. Also Read – Over 2 hours screen time daily will make your kids impulsiveRai described the exhibition as a “journey through history”, taking Indians to “moments in history that are a matter of pride for us”.”This is also a celebration of cultural exchanges and a moment to remember that our civilization has existed for millions of years and what it has given to the world in terms of culture, science and spirituality,” he said.In a message, Matt Hancock, UK Secretary of State for digital, culture, media and sport, said: “Culture is at the heart of the UK-India relationship and the living bridge that connects our two nations. This exhibition not only explores our shared history, but shows how our institutions are building partnerships that will last well into the future. I am delighted that it has reached new audiences in Delhi and I look forward to seeing it myself when I host a launch event next week.” A host of dignitaries, including British High Commissioner to India Dominic Asquith, L.N. Sharma, Chief Post Master General, Delhi Circle, Dr Hartwig Fischer, Director, British Museum, and Sabyasachi Mukherjee, Director General, CSMVS were present at the inauguration.On the occasion, National Museum released three books: Divyambara: Masterpieces of Costume from the National Museum Collection by Lotika Varadarajan; Kaivalyam: Jain Painting in the National Museum by Dr S.V. Tripathi and Pawan Jain; and An introduction to the Indus Valley Civilization by Sanjib Kumar Singh and Gunjan Kumar Srivastava. Unveiling a special postal cover brought out by the Department of Post, L.N. Sharma said the exhibition showcases Indian history from two million years ago to the present day, not just displaying the regional connects but global links that provide visitors with a lifetime opportunity and a great learning experience. The exhibition will run till June 30 from 10 am to 6 pm, except on Mondays and public holidays.last_img read more

Learning physics may activate new brain areas

first_imgBrain areas that are traditionally not associated with learning science can become active when people are confronted with solving physics problems, finds a study. This shows that the brain’s activity can be modified by different forms of instruction.”The neurobiological processes that underpin learning are complex and not always directly connected to what we think it means to learn,” said lead author Eric Brewe, Associate Professor at Drexel University in Pennsylvania, US. Also Read – Add new books to your shelfThe findings, published in the journal Frontiers in ICT, showed that newer brain regions associated with attention, working memory and problem solving – the lateral prefrontal cortex and parietal cortex, sometimes called the brain’s ‘central executive network’ – showed activity when dealing with such problems.Another area that became active was the posterior cingulate cortex, which is linked to episodic memory and self-referential thought.”These changes in brain activity may be related to more complex behavioural changes in how students reason through physics questions post- relative to pre-instruction,” Brewe noted. Also Read – Over 2 hours screen time daily will make your kids impulsive”These might include shifts in strategy or an increased access to physics knowledge and problem-solving resources,” he said.Using fMRI (functional magnetic resonance imaging) to measure blood flow in the brain, the researchers looked to map what areas become active when completing a physics reasoning task, both before a course on the concepts and after. A small group of students were taught a physics course that utilised ‘Modeling Instruction’, a style of teaching which encourages students to be active participants in their learning. “This suggests that learning physics is an imaginative process, which is not typically how people think of it,” Brewe said, in reference to the study which aimed to explore how students use their own mental models to understand new concepts.”The idea of mental models is something that people who research learning love to talk about, but have no evidence of what is happening inside brains other than what people say or do,” Brewe said. “We are actually looking for evidence from inside the brain,” he added.last_img read more

A Shattered Love Gave Rise to the Most Vengeful Female Pirate in

first_img“Hell hath no fury like a woman scorned.” These words could certainly apply to Jeanne de Clisson, a French noblewoman turned pirate who was known as the scourge of the Normandy coast during the early years of the Hundred Years War, in the mid-14th century. With a fleet of only three ships painted black with red sails, she would go down in history as one of the most vicious pirates of her time.Jeanne’s grudge against Philip VI of France started when the King executed her husband, Olivier de Clisson, for treason. Jeanne’s heart was broken and from this moment on her life became one of vengeance and piracy to get back at the crown who had wronged her.Coat of Arms of the Clisson Family. Photo by Caracal Rooikat CC BY SA 4.0The Hundred Years War — a series of conflicts in which two ruling houses, the House of Plantagenet (who ruled England) and the House of Valois (who ruled France), battled for the French throne — lasted from 1337 to 1453. Following the death of the Duke of Brittany, John III, in 1341, both houses claimed the right to control this strategic region of northwest France.Frenchman Charles de Blois was named the new Duke of Brittany, and the English challenge was led by John Montfort. Olivier de Clisson, who fought in the ranks Charles de Blois, was captured by the English and a ransom was set for his freedom.Exécution d’Olivier IV de Clisson, 1343.Judging the ransom as too low, De Blois was became suspicious of Olivier’s loyalty, presuming that he was sent back as a spy.Although without any substantial evidence, King Phillip backed De Blois’ claim, ordering Olivier’s capture and public execution — a sentence reserved only for common criminals. It was certainly not a dignified way for a noble to go.This came as a shock to local aristocrats, who were even more appalled when Olivier’s head was impaled on a spike and exhibited in the region’s capital, Nantes.Charles de Blois.After this, Jeanne swore to get her revenge. Allegedly, she even took her two sons to see their father’s head on display to entrench their hatred towards Phillip VI and his accomplice, Charles de Blois.Olivier’s property was confiscated, leaving Jeanne and her children homeless.Forced to sell all her belongings, the widow used the funds to raise a small army, advocating for the secession of Brittany from France. During her campaign she made several attacks on French outposts, massacring the garrisons, making no exception.Battle of Crecy.However, once news reached Paris, the element of surprise was lost for Jeanne de Clisson. She turned to piracy, as it proved easier to conduct hit-and-run actions at sea.Her “Black Fleet” began raiding transport vessels belonging to Phillip VI around the year 1343, disrupting supply lines and crippling the French army. In her quest for vengeance, she was not alone. Jeanne, who earned the nickname “Lioness of Brittany,” was sponsored by both the British and separatists within Brittany. In return, she provided the English with supplies during the Battle of Crecy in 1346.Standing tall on her flagship My Revenge, Jeanne de Clisson patrolled stealthily across the English Channel, harnessing great wealth through pillage. She was known to be especially merciless when encountering aristocrats loyal to the French crown.Tales of her cruelty echoed all the way to the throne room in Paris, as she would usually leave one or two survivors to tell stories first-hand.Philip VI the Fortunate.By 1350, however, Phillip VI was dead and the House of Montfort took power in Brittany. Nevertheless, Jeanne continued raiding French ships as the Hundred Years War raged on.After her flagship was sunk during a battle in 1356, she was adrift for five days together with her sons. One of them died of exposure before they were rescued by the Montforts.After this terrible mishap, Jeanne de Clisson, The Lioness of Brittany decided that she would be a pirate no more.Forced her to seek security for herself and her surviving son after their life of adventure, she married Sir Walter Bentley, a high-ranking officer in the English army, and settled in the port town of Hennebont, which was under the protection of her allies, the Montforts.There she lived until her death in 1359.Her story has been an inspiration for many written accounts and legends. Although there is evidence of her existence and many of her actions in a court verdict, pronouncing her guilty of treason in absentia, as well as several mentions in other documents confirming her alliance with the English.Read another story from us: The Epic and Gruesome Last Stand of Blackbeard – History’s Most Famous PirateIn the end, she did get the revenge she sought, as her actions largely contributed to several English victories.last_img read more

Cryptic 2014 tweet predicted CubsIndians World Series Game 7 would go to

first_img Advertisement On the night that saw the Cubs win their first World Series in 108 years, a cryptic tweet from 2014 surfaced online that seemingly predicted the whole thing. Well, almost.As the 10-inning classic unfolded, users on Twitter began posting a tweet from another user, @RaysFanGio, that laid out how the entire thing would unfold. The tweet wouldn’t have created an uproar, except it was written in 2014. The time stamp on the post confirms the date.It read, “2016 Series: Cubs vs. Indians. And then the world will end with the score tied in Game 7 in extra innings. #apocalypse.”2016 World Series.Cubs vs IndiansAnd then the world will end with the score tied in game seven in extra innings #apocalypse— GIO (@RaysFanGio) November 4, 2014 It’s scarily accurate. Cubs and Indians, 2016 World Series, extra innings. Pretty remarkable.The one area the tweet fell short was in its prediction of the game ending in a tie due to the apocalypse. The Cubs won the game and the Series, so no tie.But, to be fair, Chicago isn’t done partying yet, so the apocalypse could still be at hand.last_img read more

Russell Westbrook is in the pager business the Warriors are the iPhone

first_imgIn sports and in life, Colin likes consistent people who are focused on the right things. In his personal life, he hangs out with guys who into their families and show up on time. He likes working with people that are consistent, and that he can depend on. It’s why Colin likes Andrew Luck.Aside from last season, when he was playing with a lacerated kidney, Luck has been consistently better than Cam Newton in his career, and he is fully committed to football. Cam, on the other hand, has been surrounded by better players, but has been inconsistent. He also has a million things going on off the field. Oh, and Luck had to follow Peyton Manning, while Cam had to replace Jimmy Clausen. Colin doesn’t understand why people are so quick to defend Cam, but bash Luck at any opportunity.“Andrew Luck is in a different class than Cam Newton.”In the NBA last night, Klay Thompson dropped 60 points in just 29 minutes. Steve Kerr pulled him at the end of the third quarter because the Warriors were leading the Raptors by 35. He didn’t play in the fourth quarter. Colin likes the Warriors because they care about winning over chasing individual stats. In another game last night, Russell Westbrook posted his sixth consecutive triple double.Westbrook is taking on the NBA all by himself this year, while the Warriors are playing a team game based on ball movement and finding the open man. Colin thinks Russell is stuck in an old mindset that doesn’t work in today’s NBA, while the Warriors are playing a style that wins titles in the modern NBA. It’s easy to see why Kevin Durant left Oklahoma City for Golden State.“[Westbrook]’s #1 in the pager business, the Warriors are the iPhone 7.”The University of Houston has a problem. They keep getting, then losing, elite head coaches. First, it was Kevin Sumlin, who left for Texas A&M. Tom Herman just left Houston to take the Texas job. Colin says Houston should stop being insecure, and accept that they are a stepping stone job. They should be happy they keep getting quality coaches. Lane Kiffin is being rumored to replace Herman, but if he takes the job, it’s not a final destination, it’s a stepping stone to the next. Houston needs to realize what it is, and be comfortable accepting it.“You’ve got be comfortable, Houston, with what you are. You’re a second-tier program.”Guests:Peter King – MMQB Editor-in-Chief joins the show to break down the Jets debacle against the Colts, whether Todd Bowles is on the hot seat, what’s wrong with Cam, who he likes for Coach of the Year, why the Rams decided to extend Jeff Fisher, and his take on the red hot Raiders.Joe Buck – Fox Sports play-by-play announcer is in-studio to discuss his new book, Lucky Bastard: My Life, My Dad, and the Things I’m Not Allowed to Say on TV, which stadium is his favorite to broadcast from, his worst professional broadcasting experience, what it’s like to call a game in Dallas with Troy Aikman, and what it was like to call the final out of the Cubs World Series win.Eric Mangini – Former NFL head coach is in-studio to talk to Jeff Fisher’s contract extension, the short rope that NFL coaches typically have, why organizational consistency is the key to NFL success, and if New England is vulnerable this year despite their record.last_img read more

How Cloud Computing Saved My Business

first_img 5 min read Opinions expressed by Entrepreneur contributors are their own. Some might find it strange that something as ephemeral as the “cloud” could have as great an impact on businesses as more tangible transformational technologies such as the smartphone and computer.With the cloud, businesses don’t have to invest in and maintain costly backroom hardware and software. They are freed from costly, time consuming maintenance and administrative duties and can concentrate on what they really want to do — run a profitable operation.But the cloud is not just transforming how businesses operate. It has been critical to the survival of some companies. Here are three examples of entrepreneurs who have turned to the cloud to both establish and save their businesses.Post.Bid.Ship CEO Micky Thompson1. Post.Bid.Ship A Tucson, Ariz.-based service that matches shippers with goods to haul and carriers looking for freight on their return trips after a delivery.Dilemma: Unable to track marketing efforts or provide sales insights. Post.Bid.Ship was launched in July 2010 to provide matchmaking services between carriers and shippers, but it needed to improve and better coordinate its operations. The company initially had a three-step process — acquiring leads and converting them into clients, handling customer relations, and matching carriers and shippers — each a separate operation relying on traditional media and phone calls.Solutions: Customer relationship management (CRM) service SalesForce.com and Spark by Marketo marketing automation software. The company instituted a nearly paperless combination of online database resources, email and social media, along with the cloud-based SalesForce.com and Spark by Marketo.Instead of print ads or trade shows, Post.Bid.Ship now generates sales leads via the U.S. Department of Transportation’s online Motor Carrier Division databases, supported by email responses to link clicks on its Web site and electronic newsletters. When a lead is entered into any of its systems, the data appears almost instantaneously in the others. When a client shipper or carrier posts a listing on the company’s website, bids with complete information are generated in minutes from SalesForce and Marketo.Related: How to Share Documents in the Cloud, SecurelyUsing targeted online and social media, the company now registers new customers at a nearly 300 percent higher rate than it did using trade shows, print ads and direct sales. What’s more, it has cut sales costs by nearly 71 percent.Without the cloud-based services, Post.Bid.Ship would have needed nearly twice as much initial and operating capital, as well as an around-the-clock IT division and twice as many employees, says CEO Micky Thompson.Other examples cloud-based marketing automation services include Addemar (plans range from $74-$738 a month) and Pardot (plans range from $1,000-$3,000 a month).Patrick Albrecht, owner of Atlanta’s Great Foods Group2. Great Foods Group Operator of four Atlanta-area restaurants: Paul’s, Social Vining’s, The Vinings Fish Company and Dos Amigos Cantina.Dilemma: Managing a growing mountain of paperwork. At one point, Great Foods Group owner Patrick Albrecht had tens of thousands of documents — invoices, receipts, employee checks and pay stubs, tax papers, health department reports — crammed in every nook and cranny of his home and offices. It would take hours to track down documents.Solution: Storing all paperwork with document scanning service Evernote. Albrecht started using Evernote in early 2011, once the software was available with mobile syncing. By committing nearly six years’ worth of documents to the cloud, Albrecht could not only quickly locate specific papers in seconds, but also could compare past transactions to determine which vendors provided the best prices.Albrecht says Evernote helped accelerate the opening of his fourth restaurant, Dos Amigos Cantina, by several weeks. He used the service to create a “new restaurant” checklist of tasks and shared folders with his partners and managers so they could access architectural plans, health department permits and other documents from any device.Related: Why Google Drive Won’t Be a Dropbox KillerEvernote costs $45 a year for 1 GB of document uploads a month. But Albrecht figures moving documents to the cloud cut the company’s overall expenses by about 2 percent a month. He also has emptied his home and offices of boxes, removing an emotional strain on his marriage and creating more space for supplies and seating at the restaurants.Examples of other cloud-based marketing automation services include SpringPad and SimpleNote, both free.CDL Helpers founder and CEO Tucker Robeson3. CDL Helpers Based in Winona, Minn., CDL consults with trucking companies to reduce personnel turnover and increase productivity.Dilemma: Spiraling costs of phone systems. Founded in April 2011, CDL Helpers lends a sympathetic ear to thousands of truckers nationwide. Its half-dozen tactical management agents spend nearly seven hours a day talking with drivers of client companies, collecting anonymous information about their experiences.An automated switchboard phone system to keep in touch with drivers across the country would have cost $1,500, plus another $3,000 to $5,000 to set up and is not easily expandable. In addition, long-distance phone bills would have totaled about $500 a month according to CDL founder and CEO Tucker Robeson.Solution: VoIP-based phone system RingCentral. Launching on a shoestring, Robeson opted instead to use cloud-based RingCentral, which costs $50 a month. It allows Robeson to add lines and extensions via his PC quickly and inexpensively. The only phone equipment CDL needs are $50 PC gaming headsets.Thanks to the cloud, CDL says, it has been able to pass along its cost savings to customers and attract new clients at a faster rate.Another cloud-based expandable phone system is Line2 Professional ($14.95 per month or $149.50 per year).Related: One Tool for Managing All Your Business Schedules May 16, 2012 This hands-on workshop will give you the tools to authentically connect with an increasingly skeptical online audience. Free Workshop | August 28: Get Better Engagement and Build Trust With Customers Now Enroll Now for Freelast_img read more

Why the TSA Now Wants You to Turn On Your Cell Phone

first_img After U.S. intelligence officials discovered earlier this year that al Qaeda was fashioning new bomb varieties, the Transportation Security Administration (TSA) announced today that some travelers flying to America from overseas will have to power up their phones prior to takeoff.“During the security examination, officers may ask that owners power up some devices, including cell phones,” the TSA said in a press release. “Powerless devices will not be permitted onboard the aircraft.”While travelers may be familiar with shuttering their phones prior to takeoff, this new measure aims to thwart bombs potentially concealed within electronic devices, reports ABC News.Related: British Airways Testing ‘Happiness Blanket’ to Make First-Class More ComfortableIt is unclear which airports overseas will be impacted by the new processes.Sources told ABC that officials are taking precautions against Syrian terrorist groups working alongside al Qaeda’s branch in Yemen. The fear is that terrorists might ultimately corroborate with “one of the thousands of Americans and other foreign fighters carrying U.S. and European passports” in order to carry out an attack, the outlet reports.“Aviation security includes a number of measures, both seen and unseen, informed by an evolving environment,” stated U.S. Secretary of Homeland Security, Jeh Johnson in an announcement preceding the enhanced security procedures.Related: Surprising Tricks: How to Sleep on a Plane 2 min read Listen Now July 7, 2014center_img Hear from Polar Explorers, ultra marathoners, authors, artists and a range of other unique personalities to better understand the traits that make excellence possible. How Success Happenslast_img read more

Say Hello to Musio a Ridiculously Cute AI Robot Thats Keen to

first_img 2 min read If you’ve ever wanted to hang out with an adorable robot and casually shoot the breeze with it — naturally, (mostly) with ease, kind of like you do with your real-life friends — Musio might be your man. Or woman. Or, well, thing. Recently launched on Indiegogo, Musio is an artificially intelligent personal assistant robot that its creators describe as a “kind, crazy and smart friend.” The small stationary bot chats back and forth with you, reminds you of important dates, expresses its “feelings” and gets smarter with every interaction.Related: People Prefer Robot Bosses, Study ShowsLike Apple’s Siri and Microsoft’s Cortana AI personal assistants, Musio also fields questions and fires back answers, lame jokes included. Only it’s a lot cuter and less snarky. The Android device, which looks to be a friendlier, more personable version of the Jibo personal robot, is produced by AKA. The Korean tech upstart, which developed Musio at its Santa Monica, Calif. R&D lab, specializes in using artificial intelligence and big data to improve English learners’ speaking skills, another cool thing Musio is programmed to do.When paired with its sidekick (at added cost), a smaller white plastic gizmo called Sophy, Musio controls nearby Bluetooth “smart” home devices, such as TVs, lights, thermostats and other connected objects. Related: These Tiny Robots Have Superhero Strength (VIDEO)Edutainment and smart device bennies aside, we’re taken by how adorable Musio looks. The molded plastic droid, marketed to adults and kids alike, features goofy pointed ears, long droopy arms, short, squat legs and dual mini screens — one for its animated digital eyes and one for its pixelated beating heart. Musio’s squeaky, high-pitched cartoonish voice is cute, too, but could get old fast.So far Musio has raised more than $17,000 toward its $50,000 crowdfunding goal, with 35 days to go. Pricing for the affable gadget starts at $99. To see Musio charm a pair of giggly kid testers, check out the video below:Related: This Robotic Butler Could Make Your Next Hotel Stay…Interesting Free Workshop | August 28: Get Better Engagement and Build Trust With Customers Now June 1, 2015center_img This hands-on workshop will give you the tools to authentically connect with an increasingly skeptical online audience. Enroll Now for Freelast_img read more

At 83 Donald Rumsfeld Takes a Shot at App Development

first_img 3 min read Free Webinar | Sept 5: Tips and Tools for Making Progress Toward Important Goals Register Now » All’s fair in politics and war … but what about card games?For Winston Churchill, the same rules apparently applied: #NeverGiveIn.In a bizarre twist, this phrase now serves as the tagline for former Secretary of Defense Donald Rumsfeld’s inaugural mobile game Churchill Solitaire, which he created in partnership with a team of coders.Related: 6 Lessons in How to Build a Successful App“I’ve done business, politics, and war,” the 83-year-old wrote in a blog post announcing its release. “Now I’m trying my hand at mobile gaming.”Churchill Solitaire is essentially a more challenging version of the traditional card game. In place of a single deck players use two decks, and work with 10 rows of cards rather than the typical seven. Churchill played the game during World War II to sharpen his strategic thinking skills, according to Rumsfeld. In Rumsfeld’s app, there are varying levels and difficulties as players move up the ranks. Created for the most cunning of minds, a series of rules and limitations make the game especially challenging. For example, if the player doesn’t make a move in 30 seconds, he’s forced to surrender.The game’s “diabolical rules,” Rumsfeld says, are what “make it the hardest game of solitaire — and probably the most challenging and strategic game of logic or puzzle — I’ve ever played.”Rumsfeld said he learned the card game from one of the Churchill’s former proteges, André de Staercke, during a plane ride in the 1970s. Staercke had learned the game from Churchill himself.Until recent years, only a few people knew about the game and even fewer were able to find their way to victory.Inspired to share the tradition, Rumsfeld and his wife worked with a team of developers to perfect the game. The non-profit endeavor took years to build after the Churchill family gave the project their blessing. All profits will go to charity. However, a free version is available in the Apple Store for both iPhones and iPads.The motivation for the app, Rumsfeld wrote, was best explained by Staercke himself.“As my friend Andre de Staercke once put it to me, ‘What one needs in life are the pessimism of intelligence and the optimism of will,’ Rumsfeld wrote. “Play a couple hands of Churchill Solitaire, and you’ll know precisely what he meant.”Related: Lessons for the New CEO From 5 Great Leaders of HistoryA previous version of this story misidentified Donald Rumsfeld as Secretary of State. Rumsfeld served as Secretary of Defense. January 26, 2016 Attend this free webinar and learn how you can maximize efficiency while getting the most critical things done right. Opinions expressed by Entrepreneur contributors are their own.last_img read more

How to Drive App Discovery and Engagement

first_img This story originally appeared on Bizness Apps Free Webinar | Sept. 9: The Entrepreneur’s Playbook for Going Global August 10, 2016 Growing a business sometimes requires thinking outside the box. Register Now » “I made my app, but where are all my customers?!” As consumers look to mobile apps for the majority of their product and service needs, it’s more crucial than ever for businesses to capitalize on this market. Creating your business application is a great first step, but having customers download and return to your app is a whole other battle. Proper marketing is what sets your app apart from your competitors, ensuring top customer acquisition and retention.Check out some of the most important tactics that successful marketers are using to drive app discovery and engagement through Google.Organic searchWhen you’re just getting started, it’s important your business allocates its budget as efficiently as possible. Utilizing natural –or unpaid — Google search results through app indexing can make your app easily discoverable. App indexing allows you to attract potential users through Google search, matching what customers search with your app’s relative content. Basic SEO strategy can be used to ensure your app ranks well in Google’s natural search results, allowing you to boost app downloads at little to no cost.Paid searchGoogle play store adsReach billions of Android users with ads that appear within the Google Play Store’s search results. You can now manage your app’s ads like you do traditional text ads with keywords and bids. Google also offers tools to track metrics, such as app installations.Mobile app install adsIt’s a new world. There are now more Google searches on mobile than desktops. Search engines allow you to capitalize on this volume of traffic with paid search results. Much like organic search, mobile app install ads can be customized to particular searches to drive downloads to your app. Google is also looking to launch “streamable” apps that allow users to test them out before downloading, which would increase the importance of app indexing & paid mobile engagement ads.Re-engaging customersEnsuring that customer returns to your app is extremely important and equally difficult. A year ago, nearly 20% of apps were abandoned after their first use. Although this number is likely to decline, it is crucial to build a retention strategy that sets your app up for success.Deep linking is an extremely effective re-engagement strategy. Proper app indexing strategies will allow users to return to your app directly from the Google search results page. You can deep link searches into an already installed app and continue to market it just as you would before the user downloaded. This helps ensure your users return frequently. Be sure to keep up with your app’s push notifications too. An effective push notification strategy is a simple way to re-engage app users and improve retention rates.Your mobile app presence is absolutely necessary in today’s world. Be sure to leverage your app’s potential. 3 min readlast_img read more