Scientists introduced a device that creates holograms using ultrasound & polystyrene ball

Researchers at the University of Sussex in the UK have introduced technology that can create holograms using ultrasound and a 2mm polystyrene ball. They can move and interact with the observer.


Scientists called the new technology "multimodal acoustic trap display" (multimodal acoustic trap display, or MATD). Images are created between two horizontal plates on which many tiny ultrasound speakers are mounted. They create an inaudible sound field in which there is a "pocket" of low pressure, where a polystyrene ball enters. By moving the "pocket", you can move the ball, forming an image. Colors are added to the image using the projector.
Through careful monitoring of the ultrasound field, scientists can add sound effects and music to animated images. Vibrations can be adjusted to receive sound waves in the entire range of human hearing and, for example, to imitate clear speech. In addition, you can interact with images and even feel them in your own hands.



The…

Thanks to DNA mutation, some people only need four hours of sleep

Do you need eight hours of sleep a night or are you gonna be okay on four? 

Is it OK to get 5 hours of sleep?
Is it OK to get 5 hours of sleep?

Biologists examined a family that sleeps much less than average and found that the family members owe their anomalous sleep rhythm to a gene mutation.

Biologist Ying-Hui Fu from the University of California, San Francisco, together with colleagues, analysed the genes of twelve members of a family that only sleeps 4.5 hours a night without getting tired. The researchers discovered that the family members have a mutation in the ADRB1 gene.

When the team then bred rats with the same mutation, the animals slept 55 minutes a day less than their peers. This was accompanied by an abnormal activity in a brain area that regulates sleep: part of bridge of Varolius.

Mutations

Brain cells in this region of the brain, in which the ADRB1 gene is expressed, are inactive in normal mice during most sleep stages. The cells are active when rats are awake. In the mutated rats, the cells are even more active than usual during waking hours. The researchers also discovered that they could wake sleeping rats by artificially activating the brain cells in which ADRB1 is expressed.

All in all, the results suggest that brain cells with ADRB1 promote wakefulness and that variations in the ADRB1 gene affect how long we can stay awake every day, says Fu.

Her team previously discovered that mutations in other genes, such as DEC2, can also cause people to need less sleep.

Imitating ADRB1

The gene mutations found do not seem to lead to negative health effects. Most people who sleep for short periods of time are very happy with their sleep pattern - they usually make the most of the extra time they have," says Fu.

So why don't we all have the ability to function with less sleep? Fu believes that ADRB1 and DEC2 mutations have only recently entered the human genome, and that they have not yet had time to spread widely. 

The 8-hour standard has been the standard for a long time, but somehow new mutations have occurred recently that make this seemingly beneficial property possible,' she says.

Who knows, we may one day be able to develop drugs that reduce the amount of sleep required by mimicking the effects of the ADRB1 mutation. But that's going to take some time, Fu says.


Comments

  1. I think this is one of the such a lot important info for me.

    And i am glad studying your article. But wanna statement on few general issues, The web site
    taste is wonderful, the articles is really great : D.
    Good process, cheers

    ReplyDelete
  2. My spouse and I stumbled over here from a different website and thought I
    might as well check things out. I like what I see so i am just following you.
    Look forward to looking over your web page for a second time.

    ReplyDelete
  3. Good way of explaining, and nice post to get information concerning my presentation focus, which i am
    going to convey in college.

    ReplyDelete
  4. If you desire to improve your experience only keep visiting this web site and
    be updated with the hottest news posted here.

    ReplyDelete
  5. Hi there! I'm at work browsing your blog from my new iphone
    3gs! Just wanted to say I love reading your blog and look forward to all your posts!

    Carry on the outstanding work!

    ReplyDelete
  6. I know this web site presents quality dependent articles or reviews and additional data, is
    there any other web page which provides such data in quality?

    ReplyDelete
  7. Hello everyone, it's my first pay a quick visit at this web site, and article is truly fruitful designed
    for me, keep up posting these posts.

    ReplyDelete
  8. Great beat ! I wish to apprentice while you amend your website, how
    can i subscribe for a blog web site? The account helped me a appropriate deal.

    I have been a little bit acquainted of this your broadcast provided vivid transparent idea

    ReplyDelete
  9. When I originally left a comment I appear to have clicked on the -Notify me when new comments are added- checkbox and now every time a comment is added I recieve 4 emails with the exact same comment.
    Perhaps there is a means you are able to remove me from that service?
    Cheers!

    ReplyDelete
  10. Hi there, I enjoy reading through your post. I like to write
    a little comment to support you.

    ReplyDelete
  11. What i don't understood is in fact how you're
    now not really a lot more well-preferred than you may be right now.

    You're so intelligent. You realize thus significantly in terms of this matter, made me personally consider it from so many various angles.
    Its like women and men don't seem to be fascinated except it's
    one thing to accomplish with Girl gaga! Your individual stuffs outstanding.
    All the time maintain it up!

    ReplyDelete

Post a Comment