Anu Sharma

Questions and Answers (6) View all

• Question asked in Carbon Nanotubes
  7 Can anyone give me some information on a procedures concerning carbon nanotubes - synthesis , characterization or use for gas sensors ?
  The goal is to do some charaterization in order to make use or the carbon nanotubes as gas sensors in the future. 
  The goal is to do some charaterization in order to make use or the carbon nanotubes as gas sensors in the future.
  By Anu Sharma · Amity University
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• Answer added in Neurobiology and Brain Physiology
  5 What is the neuronal motor function which allows an image to be perceived on the eye?
  By Prashant Deshmukh · National Institute of Mental Health and Neuro Sciences
  Anu Sharma · Amity University

  The Human Visual System (HVS) is tricky. There are two components: the eye, which is the easy part to understand, and our perception of our eyes' sig... [more]

  The Human Visual System (HVS) is tricky. There are two components: the eye, which is the easy part to understand, and our perception of our eyes' signals as processed by our brains, which is the hard part. In bright light our eye's ISO drops and we see fine details and bright colors. In dim light our eye's ISO climbs (astronomers call this "dark adaptation") and we can see in the dark. Our eye's ISO climbs, which is why we see fuzzy grain while fumbling around in the dark. Our eyes only see in black-and-white in the dark. Our eyes can see in light much darker than urban and suburban dwellers experience. Our eyes adapt very quickly to bright light (although it may hurt a little as our irises contract when someone turns on the lights after a slide show), but take a longer time to become more sensitive to darkness. That's why we can't see anything when we first walk into the dark, and over several minutes begin to see more. Our eyes see nothing Our eyes don't send images to our brains. Images are constructed in our brains based on very simple signals sent from our eyes. The nerve signals from our eyes are still the subject of much study, and mostly represent edges, shapes and motion. They do not send images. The mental processing required to perceive images is so great that it represents about 40% of the body's at-rest caloric consumption. This is why it's so resting to close our eyes for a moment. (I forget the citation for the 40% number, let me know if you have it exactly.) "Seeing" is a very complex higher-order brain function, and a huge percentage of our brains (the largest, in fact, of any brain function) is required for doing nothing other than recognize what's in front of us. Pattern Recognition Our brains form images based on pattern recognition. We don't see images; our eyes see line and motion, our brains interpret that to attempt to recognize to what sort of thing those lines and motion might represent, and then our brains seamlessly cause us to perceive whatever that object might be. Pattern recognition is learned as we grow from babies. At first nothing makes sense, and as we learn about the world around us, more and more makes sense until as we grow into kids after which most of us forget what it was like when our visual systems were training. Adults rarely have instances where we realize our brains can't recognize something, and drive home how our eyes don't see anything themselves. I remember when I was very young and my visual system was still developing. (I've been curious about all this stuff since the day I was born.) I'd see lines and shapes, and it would take a moment until recognition kicked in and I'd suddenly "get" what was the object in front of me. Pattern recognition is why motorcyclists and bicyclists get run over every day by people who were looking right at them. Most drivers are looking for cars. If they're not looking for cyclists, people often won't perceive them, even if they are stopped right in front of a red light. The car driver runs right over them, and never saw them even though the car driver was looking right at them. If the car driver isn't paying attention, his brain doesn't perceive the lines and shapes from his eye's vision of the motorcycle as being a motorcycle. Notice how motorists will spot a police officer on a motorcycle a mile away. It's not just because of the white helmet; it's because the visual system is working hardest to manage all the inputs its receiving and prioritizing how it recognizes things. The brain can only recognize so much, so it's looking for what concerns it. Sadly it tends to miss things other than cars and trucks. hope it helps. regards anu .
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• Answer added in Programming Languages
  7 Which will be more beneficial for me in terms of income and placement in a multinational corporation (MNC), JAVA or PHP?
  By Jitinder Bardhen · RBIM
  Anu Sharma · Amity University

  mnc is multi national company 

  mnc is multi national company
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• Question asked in Nanoparticle Research
  1 Dielectric properties of carbon nanotubes?
  How do carbon nanotubes behave? Dielectric. 
  How do carbon nanotubes behave? Dielectric.
  By Anu Sharma · Amity University
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• Question asked in Nanoparticle Research
  Open How do carbon nanotubes become charged and get aligned on the nonuniform electric field in dielectrophoresis?
   
  By Anu Sharma · Amity University
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