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Di seguito gli interventi pubblicati in questa sezione, in ordine cronologico.
A team of Northern Illinois University scientists, with a major role played by NIU Ph.D. students, has discovered a new, convenient and inexpensive way to make high performance hydrogen sensors using palladium nanowires.
The technology could help enable a scale-up for potential industrial applications, such as safety monitors in future hydrogen-powered vehicles.
Highly flammable hydrogen gas cannot be odorized like natural gas. The new technology produces nanoscale sensors that work extremely fast and would allow for closing of safety valves before dangerous concentrations of the gas could be reached.
Scientists have known that palladium nanowires demonstrated promise as hydrogen gas sensors in speed, sensitivity and ultra-low power consumption. But the utilization of single palladium nanowires faced challenges in several areas, including nanofabrication.
“We report on hydrogen sensors that take advantage of single palladium nanowires in high speed and sensitivity and that can be easily and cheaply made,” said lead author Xiaoqiao (Vivian) Zeng, a Ph.D. student in chemistry and biochemistry at NIU. The new research is published in the January edition of the American Chemical Society's prestigious journal Nano Letters.
“The new types of hydrogen sensors are based on networks of ultra-small (< 10 nanometers) palladium nanowires achieved by sputter-depositing palladium onto the surface of a commercially available and inexpensive filtration membrane,” Zeng said.
The research was conducted at both Northern Illinois University and Argonne National Laboratory. The scientists also found that the speed of the sensors increases with decreasing thicknesses of the palladium nanowires. The sensors are 10 to 100 times faster than their counterparts made of a continuous palladium film of the same thickness.
“The superior performance of the ultra-small palladium nanowire network-based sensors demonstrates the novelty of the fabrication approach, which can be used to fabricate high-performance sensors for other gases,” said NIU Presidential Research Professor of Physics Zhili Xiao, leader of the research team and co-adviser to Zeng.
Xiao noted that Zeng’s exceptional contribution to the research is particularly impressive for a Ph.D. candidate. Zeng came to NIU in the fall of 2008 after earning her master’s degree from the University of Science and Technology Beijing. She is now a recipient of the NIU Nanoscience Fellowship, jointly supported by the university and Argonne.
“It is extremely competitive to publish an article in Nano Letters, which has a very high impact factor that is better even than the traditionally prestigious chemical and physical journals,” Xiao said. “We’re proud of Vivian’s achievements and grateful for her creativity and diligence.
“Nanoresearch is truly interdisciplinary,” Xiao added. “Chemists have undoubtedly demonstrated advantages in nanofabrication by utilizing methods of chemical synthesis to obtain extreme nanostructures, while physicists have strengths in exploration of new physical properties at the nanoscale. This research benefitted tremendously from Vivian’s expertise in chemistry. In fact, the substrates used to form the novel networks of palladium nanowires are common filtration members known to chemists.”
Source: PhysOrg
We have previously reported on the development of prototype adaptive focus glasses at the University of Arizona (UA) that were able to switch focus electronically. Unlike manually adjustable focus glasses, such as TruFocals, that place a flexible liquid lens between two rigid lenses, the lenses of the prototype glasses consisted of a layer of liquid crystals sandwiched between two pieces of glass. By applying an electric charge, the orientation of the liquid crystals – and therefore the optical path length through the lens – was able to be changed, resulting in glasses that changed focus electronically. This technology is now on its way to consumers with PixelOptics showing its emPower! glasses at CES 2011.
Relying on liquid crystals, the glasses, which PixelOptics will bring to market under the brand name emPower!, are able to switch focus in the blink of an eye and with no moving parts – unless you count the reorientation of the liquid crystals. Being electronically activated also allows for a neat feature. While the wearer is able to manually activate the change of focus by touching the arm of the emPower! glasses, thanks to an accelerometer embedded in the arm, with a swipe they can also set the glasses to change focus automatically when they look down to read.
Being electronic also means batteries. The battery embedded in the glasses can be recharged in around two hours using an inductive charger and is good for two to three days, depending on usage patterns.
Calling them the “world’s first electronic focusing eyewear,” PixelOptics' emPower! glasses are based on the technology originally developed at UA, which licensed three patents to Johnson & Johnson, who then sold the patent licenses to PixelOptics to commercialize the technology. That commercialization is set to happen some time this year when PixelOptics plans to launch its emPower! glasses in around 36 different styles.
Source: GizMag - zeitnews.org
Bell, Book & Candle restaurant in the West Village is using its roof to grow sixty percent of its ingredients via energy-efficient Aeroponic growing towers. Led with Chef John Mooney’s locavore beliefs, Mooney’s initiatives transcend the typical local farm-to-table restaurant. By growing vertically, Mooney is able to control what goes into each vegetable, with a contained water system and no soil – meaning no additives or pesticides are necessary.
Furthermore, since Bell, Book & Candle is self-supplying, fruits and veggies are picked at their peak and used immediately, rather than being stored for long periods of time. A carbon neutral pulley brings each day’s harvest down into the kitchen to be turned into mouth-watering dishes such as Roasted Heirloom Pumpkin Soup, Rooftop Mixed Green Salad, and Gin & Tonic Wild Salmon with caramelized cauliflower. Any produce that isn’t sourced from above is instead purchased from a cold-weather greenhouse in nearby Lancaster, PA. But it really doesn’t get any fresher than rooftop-to-table!
Source: InHabitat - zeitnews.org
As I added in Luke’s previous post, our co-bloggers started really productive. Luke immediately composed another awesome article, containing some of the never before seen 3D pavement art photos. Read his article and check for more photos inside. There you can also find same locations, just shot from different angles. – Vurdlak
Eduardor Relero has made these amazing chalk drawings in the streets of Spain. However, this don’t look like your average Julian Beever drawings, each one could contain a hidden message about poverty or death such as “Amnesty International“, but I’m stumped for what these pictures could mean. I especially like the rich man or women holding the gun, it took me a while to see that. I also like the baby head and the skull drawings because they’re done so well! I appreciate the skull one more though, because if you look closely at the background the sun appears to be right above the drawing, but the drawing itself seems to create its own light source. How amazing is that?
Draw yourself to the article and see his brilliant creations. For now i say Muy Bien Eduardor! – Luke
Source: moillusions.com
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- 45. Don’t burn bridges. By that I mean maintain your relationships with people even if you think you are never going to see them again. For example, if you are quitting your job, don’t chew out your boss before leaving! You might run into him/her again later and life and wish you had never severed ties so harshly. You never know when you might need the help of someone you knew in the past. Plus there is already too much hatred in this world, why add more towards the people you interact with?
- 46. Keep a journal/diary. It sounds like a very monotonous habit at first, but when you get into it, that little book will become a great way to organize your thoughts and track your growth over the years. Most of us already stay awake in bed at night pondering the events of the day anyways so why not document those thoughts in an organized fashion? That will allow you to look back and observe how your way of thinking has changed over time.
- 47. Read “New Pyscho-Cybernetics” by Dr. Maxwell Maltz. This book will explain why the content of your thoughts has such a profound effect on your life through religious, philosophical and scientific arguments. A must read for completely understand who this life thing works.
- 48. Learn to use and trust your subconscious/intuition. When you spend time in silence everyday, listen not for words but for a feeling that tells you to do something. Do not mistake your own reasoning and thoughts for those of your subconscious. If you can track where the thought came from, (this thought led to that thought which led to this thought, etc.) then it was not from your subconscious. Learning to accurately discern between the two will allow you to tap into knowledge that you don’t consciously have.
- 49. Develop a charismatic personality. You know, the kind of personality that is surrounded by people constantly and is the life of the party. Start visualizing yourself as THAT person. Maybe take a short course on dynamic speaking and learn some jokes. Take the time to learn some party tricks and sleight of hand. Most importantly, believe that you already are charismatic even if you fail at beign the center point of the next party. Lie to yourself constantly and tell yourself that you are more warm and gregarious than Ronald Regan. Belief is the first step! Reality will come soon after.
- 50. Love is all there is. If you truly want to be a master of life, let love be in your every action. Love your friends, family and enemies alike. This is the most difficult thing to do out of this entire list, which is why it is listed at #50. But if you accomplish this, you will be seen as a leader among everyone that allows hate, envy, disgust and all other negative emotions into their lives. Think Gandhi. Love is so rare in this world when compared to the massive presence of hate that by exuding love, you will immediately see yourself and the people around you change. Love. Love. Love.
Source: highexistence.com
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- 38. Come up with a life mantra. You know, like “Carpe Diem” or “Live life to the fullest,” but not as cliché. Make it something that really hits home with you so that you will actually stick to it. Make sure it’ not so specific that it rarely applies but also not so general that it’s not personal.
- 39. Get good at something. Call it a hobby or a passion, whatever it is, just get damn good at it. Your occupation does not count! Make it something that you can practice often enough to excel at. Examples: Magic tricks, surfing, ping pong, creating short films, and unicycling. It can be anything but I would recommend choosing something that: 1) You are passionate about 2) You can bust out at any moment to display your skills for any discerning crowd. My mind goes immediately to aerobatics and break dancing, but that’s just me.
- 40. Work out those abs. Above any other muscle group in the entire body, the abs are the most important AND, for guys, the most impressive to the opposite sex. They constitute your core, the center point of your body. Your ability to balance comes almost completely from the strength of your abdominal muscles and balance is vital to performance in any physical activity. Summary: they’re very important. For more info on how to work out your abs, check out this video.
- 41. Keep your brain sharp. The majority of people are stuck in ruts. They go to the same job everyday, hang out with the same friends and eat at the same places. While that may feel safe, it’s not the most stimulating lifestyle for your brain. Those synapses have been built up enough, so try something that you do NOT know how to do! Buy a model car kit, master the art of sudoku or crosswords, or go pick up another major at your nearest college. The point is you need to be learning new things to keep your brain honest. Form new synapses by forcing your mind to work in ways it has not worked before. Just like physical workouts, doing too much of the same exercise will eventually give no results. Switch it up!
42. Read something inspirational right before bed and after waking. This will set get you in a great mood for sleep and for the day. Read anything from a famous speech to your favorite self-improvement book. Try to read something that get’s you really excited in the morning especially so that you’ll leave your house beaming with energy and wonder.
- 43. Do what you love. There is a huge difference between making a life and making a living; which one are you making right now? So many spend their entire lives trying to make as much money as possible so that they can afford to do what they really want later. It makes no sense to settle in life until you’re 65 so that you can retire and do what you want when you’re already WAY past your prime. We only live life once so why wouldn’t you want to spend it pursuing your bliss? To do anything else would be a tragic waste of the freedom you are allowed if you are reading this right now. Follow your bliss and you will be a thousand times more happy than your retirement date and 40+ years younger.
- 44. Choose your friends wisely. You are affected far more than you think by the people you spend your time with. Do your friends share your values? Do they encourage you when you speak of your goals and dreams or do they scoff? Make sure the people around you are conducive to the lifestyle you want to lead or you will find yourself being dragged again and again into behavior that distances you from your desires. Friends with a habit of producing negative thoughts will especially hinder you. This can be a hard task to follow through with if you realize you good friend is one of these saboteurs, but you must be firm! Don’t let anyone get in the way of you being all that you can be.
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- 30. Meditate everyday for at least 20 minutes. In this modern world where everyone is so connected to everything else via cell phones, TV and internet, most people rarely enjoy the beauty of silence. The ability to quiet your mind and relax your body is an art and skill that everyone should develop. Simply sit somewhere, preferably in nature, and focus on your breathing or try to think about nothing. This is going to be extremely hard at first! You might find it boring or just plain impossible to think of nothing, but you will get better and you will learn to love it. Post-meditation, you will feel extremely clear headed and.. well, just plain wonderful. The only way to really understand this sensation is to try it.
- 31. Learn to control your mind. What kind of skilled human are you if you cannot even control your own thoughts? While the human mind is described as being a stream of consciousness, that does not mean you can’t decide where your stream flows. Techniques like meditation and the 3 ways to flush out negative thoughts will aid you immensely in learning to control your mind.
- 32. Learn to control your emotions. The only person that can make you unhappy is you! You are the one that decides to be affected by the words and actions of others. Realize this so that the next time you experience a negative emotion, you can find the strength within yourself to overcome it.
- 33. Take a class in speed reading. Books are full of information that can enhance your knowledge-base, vocabulary and yourself as a person. Speed reading is an easy way to get at this info faster so that you can have more time for other endeavors.
- 34. Relax! This one is for you work-o-holics out there (myself included). Yes, work is very important and productive but you need to take some time to chill out everyday or you are going to burn out faster than a candle with no oxygen. Additionally, you need to reward yourself for a job well done. What’s the use of doing all of that work if you can’t have a little fun from time to time anyways?
- 35. Work on making good first impressions. Practice a strong, firm handshake and the small talk that generally goes along with meeting someone for the first time. People won’t know what to think of you if you have nothing more to say beyond “My name is _______, nice to meet you.” Also make sure you remember names, as mentioned previously. Who knows, you may be going into business with or marrying this person you’re meeting for the first time if you make a good impression. Be sure and make an excellent one.
- 36. Learn to use your eyes to their full potential:
- Make constant eye contact when in conversation. Looking away (especially down) is a sign of inferiority and unsureness. Instead, look at your conversation partner dead in the eyes and keep them locked on
- Master the piercing stare. You know when someone looks at you and it feels like they can see into your soul? Well that’s not a hereditary characteristic, it just takes practice. Work on sharpening your gaze in the mirror. You’ll know you have it when it’s intimidating to continue looking at yourself
- Master the one-eyebrow raise. This one isn’t necessary by any means, but hey, why not? Pick a brow to learn with and go look in a mirror. Raise both of your eyebrows but use your hand to hold down the brow that you want to stay down. This will probably feel very stupid at first but if you keep trying, you will eventually pin down the muscle you need to flex to get that one brow up
- 37. Be mysterious. Don’t let off everything about you and definitely leave out some major details. There is something both alluring and mesmerizing about someone that no one knows fully about. I’m not saying to confide in no one or to alienate yourself. Just think James Bond.
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21. Utilize ‘The Burning Method.’ Whenever a fear or worry or complaint comes to mind, close your eyes and imagine writing down the thought on a piece of paper. Then proceed to light the paper and fire and watch it disintegrate. Even better, actually write it down and burn it. You won’t have any problem ridding your mind of the thought after doing this.
- 22. Travel. Anyone who has ever gone anywhere will tell you that traveling is one of the most exciting and life-changing activities that you can do. Observing a different culture will expand your mind while making you further appreciate the life you already live. This goes back to becoming an explorer: this world is your jungle so go explore! Who knows, maybe you’ll find a place you love so much that you decide to move. Imagine the positive repercussions a new environment could have on your life.
- 23.The Rubber Band Method This is the third and final way to rid yourself of negative thoughts (hopefully by now you have figured out that this is very important!). Place a rubber band around your wrist and snap it against your skin anytime a negative thought finds its way into your head. This classical conditioning technique associates a slight pain with negative thoughts like Pavlov associated food/salivation with the sound of a bell. Sounds a bit cruel at first but it only stings for a second, I promise. Plus the outcome, having only positive thoughts, far outweighs a little slap on the wrist here and there.
- 24. Learn to be unaffected by the words of others. Most people get very upset when they are called negative names by others, but there is a simple trick to overcoming this. Here it is: If I went up to you and called you a fire hydrant, would you be upset? Of course not. Obviously you are not a fire hydrant, you are a human being. The same concept applies to when someone calls you something that you know you are not. They are foolish for saying such things, so why would you react with such anger? The only exception is when someone calls you something that is true! In this case, you should thank them for alerting you to a weakness, one that you can now work on changing.
- 25. Read “Zen and the Art of Happiness” by Chris Prentiss. This book will give you the knowledge and instruction to be happy at all times regardless of the circumstances. Yes, this sounds like an oversimplification of happiness, but I assure you that this book will change you in an amazing way.
- 26. Develop the ability to forgive. Forgiveness is something that most people fail miserably at even thought it’s so simple. Grudges only bring more misery to those who hold them and prevent good relations with the target. YOU makes mistakes all of the time so why not have mercy when other do? Remaining angry feels horrible while forgiving someone brings a refreshing sensation to the mind and healing to the relationship.
- 27. Be the person that makes others feel special. Be known for your kindness and sympathy.
- 28. Learn to lucid dream, or to realize when you are dreaming so that you can control your dreams. Sleep feels good, but its rather boring and unproductive. With lucid dreaming under your belt, night time can be even more exciting than when you are awake. You can do anything: fly, travel to other planets, party with a celebrity, get intimate with your dream boy/girl, etc. Many lucid dreams have also reported being able to speak directly with the subconscious during dreams by demanding to be taken to it after becoming lucid. For those that know a thing or two about your subconscious, that is a BIG deal.
- 29. Visualize daily. It has been said and proven time and time again that what you focus on is what you get. If you complain all of the time, you will run into more of the things you complain about. The same goes for good things like health, wealth and happiness. So spend some time in the morning imagining yourself achieving whatever it is that you currently desire. Focus is key in this exercise, so choose a quiet environment where you won’t be disturbed. If you’re having trouble focusing and continually find that your mind has wandered to something else, read about meditation in the following life tip. There is a lot more to this concept, so check out the full article on visualization and the law of attraction here.
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