Japanese Device Uses Laser Plasma to Display 3D Images in the Air

first_img Explore further A collaboration of the Japanese National Institute of Advanced Industrial Science and Technology (AIST), Keio University and Burton Inc. has produced a device to display “real 3D images” consisting of dot arrays in empty space. Copyright 2006 PhysOrg.com Many previous displays in 3D have been virtual images on 2D planes which, due to human binocular disparity, appear as 3D. However, the limitation of our visual field and the physical discomfort caused by wrongly identifying virtual images makes these displays less than perfect.The new device uses the plasma emission phenomenon near the focal point of focused laser light. By controlling the position of the focal point in the direction of the x-, y-, and z-axes, real 3D-images in air (3D-space) can be displayed. A 3D-object displayed using a 3D-image spatial drawing device. Credit: National Institute of Advanced Industrial Science and Technology. Various 2D and 3D objects drawn by the display device. Credit: National Institute of Advanced Industrial Science and Technology MEMS-in-the-lens architecture for laser scanning microscopy Citation: Japanese Device Uses Laser Plasma to Display 3D Images in the Air (2006, February 27) retrieved 18 August 2019 from https://phys.org/news/2006-02-japanese-device-laser-plasma-3d.html Our living space and the objects within it are three-dimensional but while 3D imaging is well documented on the Internet, we don’t see “real 3D-images” on our computer screens. This is because our monitors are unable to display them.Keio University and Burton Inc. noticed that, when laser beams are strongly focused, air plasma emission can only be induced near the focal point. So, they experimented by fabricating a device to display 2D-images in the air. The images are constructed from dot arrays produced by a technique combining a laser light source and galvanometric mirrors. To form 3D-images in the air, the scanning of the focal point in the depth direction along the laser optical axis is essential. However, to do this, the quality of the laser and the technique for varying the position of the focal point must be improved. This explains why we do not yet have the technology to display 3D images.By modifying the 2D image device with a linear motor system and a high-quality and high-brightness infrared pulse, the AIST, Keio University and Burton Inc. created a spatial display of “real 3D images” consisting of dot arrays.The linear motor system can vary the position of the laser focal point by high-speed scanning of a lens set on the motor orbit. Incorporation of this system makes the image scanning in the direction of the z-axis possible. For scanning in the x and y axis directions, conventional galvanometric mirrors are used.The high-quality and high–brightness infrared pulsed laser (repetition frequency of pulse: approximately 100 Hz), enables plasma production to be more precisely controlled, resulting in brighter and higher contrast image drawing. Furthermore, the distance between the device and drawing points can be extended by several meters.The emission time of the laser pulse light is approximately a nanosecond (10-9 sec). The device uses one pulse for each dot. The human eye will recognize the after-image effect of plasma emission from displays up to 100 dot/sec. By synchronizing these pulses and controlling them with software, the device can draw any 3D objects in air. Overview of the 3D-image spatial drawing device. Credit: National Institute of Advanced Industrial Science and Technology. 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

Einsteins green refrigerator making a comeback

first_imgIn 1930, Einstein and Leo Szilard designed a refrigerator that required no electricity and had no moving parts. While almost everybody knows how Einstein revolutionized physics with his theories of relativity, many people may not know that the great scientist had a domestic side, too. Well, sort of – in 1930, Einstein and his former student Leo Szilard designed a refrigerator that required no electricity and had no moving parts. However, as refrigerator technology became more efficient, Einstein’s design was nearly forgotten. Citation: Einstein’s green refrigerator making a comeback (2008, September 25) retrieved 18 August 2019 from https://phys.org/news/2008-09-einstein-green-refrigerator-comeback.html Now, Malcolm McCulloch, an electrical engineer at Oxford, is trying to bring Einstein’s refrigerator back. McCulloch explains that the design is environmentally friendly and could prove especially useful in developing countries, where demand for cooling appliances is quickly increasing.McCulloch’s team has recently built a prototype of Einstein and Szilard’s refrigerator. Instead of compressing man-made greenhouse gases called freons, as typical refrigerators do, the prototype uses pressurized gas to keep items cold. The refrigerator just requires a way to heat the liquids, and McCulloch has been working on developing a solar energy system to meet this requirement.The refrigerator is based on the idea that liquids boil at low temperatures when the surrounding air pressure is low. “If you go to the top of Mount Everest, water boils at a much lower temperature than it does when you´re at sea level, and that´s because the pressure is much lower up there,” McCulloch said.In their refrigerator prototype, the scientists filled a flask with liquid butane (which is also commonly sold as a liquid in cigarette lighters and as a gas for cooking). Then the scientists introduced a new vapor to decrease the air pressure, which decreases the liquid boiling temperature, causing the butane to boil. As the butane boils, it takes energy from the surroundings, and lowers the temperature inside the refrigerator. Although Einstein and Szilard´s original design was not as efficient as the freon refrigerators that replaced them, McCulloch plans to improve the design by using different kinds of gases. He predicts these improvements could quadruple the refrigerator´s efficiency. The fact that the refrigerator has no moving parts could also be advantageous, he explains, as it would require minimal maintenance and so could be particularly useful in rural areas. McCulloch emphasizes that the refrigerator is still just a prototype, but he hopes to one day commercialize it. The work is part of his team’s three-year project to develop robust appliances that can be used in locations without electricity.via: The Guardian 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

Destination determines direction

first_imgWhat made you realise that motivation speaking was your calling?My life is a result of a contribution of all the people I have met in all these years and they are responsible for enriching it. Books, too, have had a very positive influence in my life and has played a huge role in making me who I am today. When I started noticing that these positive influences had changed my life for the better, I wanted to carry them forward for others. With that in mind I started volunteering my time in maximum security prisons in the United States and started teaching prisoners about and attitude-self esteem programmes. After observing them, I thought of bringing these fundamentals to the corporate world and started working with corporate giants. Eventually after publishing my book Also Read – ‘Playing Jojo was emotionally exhausting’You Can Win in 1997 people started attending my sessions after reading my book and things fell into place. What are you referring to when you talk about bringing about a positive change in people’s lives?The most important change is the change of attitude, because invariably, many times in life we do not realise that we are our own biggest problems. We never analyse our own behaviour, instead we keep trying to control other people’s behaviour, not realising that other people’s behaviour is a reflection of our own. It is impossible to change how others behave but by changing my own actions and reaction, I can influence how others behave towards me. Also Read – Leslie doing new comedy special with NetflixAnother important factor we need to understand is that we cannot solve all our problems but we can certainly learn how to handle them. Life is full of choices and compromises, it seems like a contradiction but  really it’s not. If I ill-treat someone, I have chosen to be ill-treated myself, if I drink too much tonight, I have chosen that horrible headache the next morning, so life is full of choices and if you look at it, right from morning till night we keep making choices one after the other including what time we choose to wake up, to what we eat to how we dress up, everything is a choice we make.  In life we cannot choose the cards we are dealt with, but what we can choose is how we play the game. Sometimes nature gives us a lemon, it is our choice whether we cry or we make lemonade out of it.What are the ‘golden rules’ for  success?Persistence, hard work and focus are key to achieving success. Persistence is basically ability to bounce back even after several failures. Be it Thomas Edison or Bill Gates or Steve Jobs, they are all prefect examples of persistence. There is no substitute to hard work in life. These days’ people talk about working smarter versus harder. Take for example Olympic gold medallist and record holder Michael Phelps who has trained for over 10,000 hours for 15 seconds of performance. Most people want to succeed but very few are willing to pay the price to prepare to succeed.Most of us lack focus in life, unless you have a clear destination, how can you find directions? Most of us lose focus of our target and hence, end up not succeeding in life. To succeed, you need to do whatever it takes to achieve the target, put in that extra effort, even when it hurts. The difference between a good and a bad professional is that a good professional is that even on a bad day, a good professional’s output remains the same as that on a good day. They won’t compromise on the quality of performance. Could you tell us about your future plans or projects that you are working on?Well I am in the process of writing four more books on leadership, parenting skills, customer service and time management. So these four books, two of them should be out by September this year. Beyond it, we have a couple of things in mind. We are looking at starting to offer leadership programme in management institutes because today graduates that are coming out from engineering and management schools and NASDAQ did a study and Narayan Murthy said it too, that 90 % of them are unemployable. Would we be seeing you back in politics any time soon?Well, all I can say is that my getting into the political arena was not a trend or a fad that came in. You see when some things bother you deep inside and they keep coming back to haunt you and one has to take an action. All these issues of corruption etc. that have been raised in the recent past, I have already filed a petitions regarding the same in the court ten years back and I am still fighting them. I haven’t ruled out anything at this point and there are political parties that are in touch with me. I am still looking at how I can make a contribution; I may not necessarily have a ticket and fight the elections but I will certainly be supporting some good people.last_img read more

The film theory

first_imgAt the closing ceremony national award winning director Tigmanshu Dhulia addressed the event at NDMC Convention Centre, Connaught Place.On the occasion, Sanjay Maharaj, actors Gagan Malik and N.G. Perera of the film Siddharth Gautama with Ariel Cohen, director of closing film, Take Mama were present and witnessed the event.The seven days long festival not only showcased films but also gave a platform to creative people. The festival celebrated the success of world cinema with other competitions like ‘Face of the year’, ‘Best  Singer’, ‘Best Painter’, ‘Best Poet’ and ‘Best Sculpture’ and also rewarded for ‘Best Feature Film’, ‘Best Documentary’, ‘Best Story’, ‘Best screenplay’ & ‘Best Short Film’.  174 Films from 39 countries around the world were showcased during the festival.Indian Documentaries like Women Prayed and preyed upon and The River with some other short films from other countries like, Aab, Magnetism, Please Forgive me were a part of the elaborate line-up.last_img read more

Australia to tighten immigration laws crackdown on extremists

first_img“This year, the government will consider what further legislation is needed to combat terrorism and keep Australians safe,” Prime Minister Tony Abbott on Monday said while releasing a Review of Australia’s Counter-Terrorism Machinery in Canberra.The review came after the deadly siege in December at a Sydney cafe where a self-styled extremist cleric took 18 people hostage inside the cafe and demanded he be delivered an Islamic State flag. The cleric and two hostages were killed. Also Read – Pro-Govt supporters rally as Hong Kong’s divisions deepenIn his National Security statement, Abbott stressed that Australia faced?a new, long-term era of heightened terrorism threat, with a much more significant “home grown” element.Abbott said the government would seek to change the laws to enable authorities to revoke or suspend Australian citizenship in the case of dual nationals.“I am announcing that the Government will look at new measures to strengthen immigration laws, as well as new options for dealing with Australian citizens who are involved in terrorism. We cannot allow bad people to use our good nature against us. “The Government will develop amendments to the Australian Citizenship Act so that we can revoke or suspend Australian citizenship in the case of dual nationals,” he said. Also Read – Pak Army ‘fully prepared’ to face any challenge: Army spokesman“Those could include restricting the ability to leave or return to Australia, and access to consular services overseas, as well as access to welfare payments,” he said.He said people who fight against Australia “forfeit their citizenship” and that Australian nationals would also risk losing “privileges” if they were involved in terrorism. Abbott also suggested that tougher laws to target “hate preachers”, pointing to the political group Hizb ut-Tahrir. He said the actions against such groups would include programs to “challenge terrorist propaganda” and provide online material “based on Australian values”.“It will include stronger prohibitions on vilifying, intimidating or inciting hatred,” he added. “We will clamp down on those organisations that incite religious or racial hatred. No-one should make excuses for Islam-ist fanatics in the Middle East or their imitators here in Australia.” He said that it would also include stronger prohibitions on vilifying, intimidating or inciting hatred.last_img read more

Food essentials for lustrous skin

first_imgDig into sprouts, kiwi, yogurt and other nutritious food items for a radiant skin, says an expert.Here are some of the beauty essentials suggested by capital-based dermatologist Navin Taneja:* Protein repairs damaged tissue. Eatables like eggs, yogurt and beans offer a good dose of protein.* Eat foods high in antioxidants that help protect your skin from damage. Cherries, blueberries and other deeply coloured berries are best source of antioxidant. They help you in fighting off blemishes. Also Read – ‘Playing Jojo was emotionally exhausting’* Essential fatty acids help to retain the elasticity of the skin and are good fats which must be included in the diet. Walnut is the type of nut that contains significant amount of omega-3 fatty acid. Other great sources of fatty acids are spinach, cauliflower and broccoli.* Vitamins help to keep the skin hydrated and make it glow. Food such as papaya, strawberries, kiwi, orange, guava, sprouts and green leafy vegetables are rich in vitamins and help to enhance the radiance of the skin.* Essential minerals like zinc and sulphur are a must in one’s diet to prevent acne and skin related issues. Minerals are also responsible for rebuilding keratin and collagen that are important ingredients for glowing skin and shiny hair. Pumpkin, mushroom and sunflower seed are high in minerals.last_img read more

India can become engine of global economic growth

first_imgIndia has the potential, resources and talent to become the engine of global economic growth. Anil Agarwal, Chairman, Vedanta Group, stated that India’s potential of attracting investment worth $100 billion is a great opportunity to create value for its people. Vedanta, India’s only diversified natural resources company, is participating at the Hindustan Times Leadership Summit 2015, held on Friday and tomorrow. While attending the Hindustan Times Leadership Summit, Agarwal said, “I am confident it will emerge as a global investment destination and an easier place to do business.” Also Read – Punjab & Sind Bank cuts MCLR by up to 20 basis points The Indian government needs to take a broader perspective of its policies and reduce process time to ensure a faster and transparent decision. Stressing for higher extraction of natural resources in the country, Agarwal, while commending Honourable Prime Minister Narendra Modi’s ambitious ‘Make In India’ mission, suggested that it needs to be supported by ‘Find In India’ and ‘Mine in India’, thus skilling the youth and creating thousands of SME’s and create job opportunities. Vedanta has created value for all the stakeholders, including the Union Government, and has produced tremendous job opportunities across the natural resources value chain. It is Agarwal’s dream for Vedanta to be India’s flagship and world class diversified natural resources company which represents the country on the global map. Also Read – ‘The great gold bull market has begun’Agarwal is committed towards poverty eradication and making India a self-sufficient economy. He believes that for every young individual to truly become an active participant in India’s economic growth the tripartite network of government, academia and industry is crucial. It will engage, enable and empower these bright minds thus boosting not just employability but also enterprise.Today India looks poised to grow at over 7.5%. While, it is a robust rate, Anil Agarwal is confident that it can achieve double-digit growth. The nation’s billion plus population houses over 600 million women. 50% of its total population is between the ages of 0-25, which makes India one of the youngest nations globally. Such demographic wealth is unmatched. But it can only be tapped when its youth are educated, when its women are empowered.last_img read more

Spanner in the works Cyclists making main thoroughfares accidentprone

first_imgKolkata: Cycling on main thoroughfares by flouting ban imposed by the city police is posing a serious threat to drivers, thereby putting a stumbling block on the smooth implementation of the Safe Drive Save Life campaign.Though there has been no report of any cyclist falling victim to road accidents in recent times, senior police officers said that there may be major accidents at important road intersections as cyclists have a tendency to flout traffic rules. Also Read – Rain batters Kolkata, cripples normal lifeIt may be mentioned that Chief Minister Mamata Banerjee has launched the state-wide Safe Drive Save Life campaign, with an aim to bring down the number of road accidents. Both Kolkata Police and West Bengal Police have taken up several “Safe Drive Save Life” programmes, following direction of the Chief Minister. At the same time, steps have been taken for prosecuting those violating traffic norms.”But the entire effort of bringing down the number of road accidents would receive a major blow, if a major accident takes place in the city due to cycling on the roads where it is banned,” said a police officer on condition of anonymity. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedHe further added that there is a need to take immediate steps to check cycling on the 62 roads where it has been banned by the Kolkata Police by issuing a notification as per the West Bengal Motor Vehicles Rules, 1989.Names of the roads and the timing during which there will be restrictions on cycling were mentioned in the notification, after stating that the order to restrict plying of vehicles including cycle van, hand cart, pull cart and bicycle, was given to provide “safe and uninterrupted movement of vehicular traffic”. There are as many as 174 roads where there is restriction on plying of cycle vans, hand carts and pull carts for a particular time in a day. Similarly, there are 62 roads and bridges where there is restriction on cycling.There is restriction from 7 am to 11 pm on roads including Ashutosh Road, Rani Rashmoni Avenue, Chittaranjan Avenue, Rash Behari Connector, Jawaharlal Nehru Road, Chowringhee Road, Mahatma Gandhi Road and Shyama Prasad Mukherjee Road. There is restriction on cycling for 24 hours on thoroughfares and flyovers including Camac Street, Red Road, Government Place West, Old Court House Street, BBD Bag East, BBD Bag North, Lock Gate Flyover, Chingrighata Flyover, Park Street Flyover, Gariahat Flyover, Sealdah Flyover and Brabourne Road Flyover.last_img read more

Lombardy Governor team likely to attend BGBS on February 78

first_imgKolkata: A delegation from Italy’s Lombardy is all set to attend the Bengal Global Business Summit (BGBS) scheduled to be held on February 7 and 8, 2019. Governor Attilio Fontana is also likely to attend the event.Digging into elaborate details about Bengal’s potential to offer a favourable climate for trade and investment for Italian investors, Chief Minister Mamata Banerjee made a passionate appeal, reminding the audience of several social schemes that her government has introduced to empower the grassroots sector, which can be developed as a potential area of investment. Also Read – Rain batters Kolkata, cripples normal lifePointing to the skilled and cheap manpower that Bengal has to offer, she said Italian technology in various fields such as leather, fashion design, jewellery, steel and mining among education, tourism and others could find greater synergy. After the meeting, Banerjee wrote on her Facebook page: “Today, I had an excellent round of discussions with Attilio Fontana, president of the Lombardy Regional Government of Italy. Talks centred around strengthening relations between the Lombardy region of Italy and Bengal and explore areas of mutual collaboration in business, education, tourism and other key sectors. I took the opportunity to invite him to the Bengal Global Business Summit, 2019 and requested him to lead a delegation to Bengal to have a first-hand feel of the opportunities available here in the state. He has accepted the invitation and has expressed keen willingness to come to Bengal with a strong business delegation”. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedBanerjee and Fontana spoke in detail about the areas of business where both of them can participate. The Chief Minister suggested that in skill development, Italy and Bengal can be great partners. “We are number one in skill development in India and here Italian participation is welcome.” It may be mentioned that while addressing the gathering of industrialists and representatives of different Chambers of Commerce in Milan on Monday, she had said: “Italy has the technology and we have skill and development can take place if Italy and Bengal collaborate.” She said in fashion designing, Italy, which is one of the leading fashion centres of the world, can invest in a design hub that is being planned in Bengal. Umesh Chowdhary, Vice-Chairman and Managing Director of Titagarh Wagons, has purchased a factory in Lombardy and both Italy and Bengal can explore the possibilities in the steel sector. Expressing her zeal towards football and portraying Kolkata’s ardent fan following for Italian football, she said: “We have three football clubs — Mohun Bagan, East Bengal and Mohammedan Sporting and we love your football, particularly AC Milan.”last_img read more

South Eastern Railway conducts antilittering drives

first_imgKolkata: The South Eastern Railway (SER) conducted special anti-littering drives on Saturday and Sunday at Santragachhi and Howrah Stations. During the two-day drive around Rs 27,000 was collected as fine.According to the SER, on Saturday officers and ticket checking staff were deputed in and around of Santragachhi Station’s platforms. The intention was to sensitise the passengers travelling not to make the platforms and other areas of the stations dirty by spitting or other means. Each passenger found littering the area was fined up to Rs 500. Also Read – Rain batters Kolkata, cripples normal lifeAccording to the SER officials, the drive was conducted not only to prosecute the passengers but to spread awareness among people. Sources informed that people found spitting was charged Rs 100 and people found throwing garbage on railway tracks or at platforms were fined Rs 500. On Saturday, the SER collected Rs 13,000 from the persons caught littering the area. Around 100 people were prosecuted including some without ticket passengers. On Sunday, the drive was conducted at the New Complex of Howrah Station. Around 108 persons were prosecuted for littering the station area and the SER has collected approximately Rs 14,000 as fine. The SER has announced that such drives will continue as a surprise check across the SER jurisdiction in future. “Such type of drives will continue at different stations under SER jurisdiction. The teams will consist of Commercial Inspector with Ticket examiner and RPF staff as it was on Saturday and Sunday,” said spokesperson from the SER.last_img read more