What are those floaty things in your eye?

What are those floaty things in your eye?

Sometimes, against a uniform, bright background such as a clear sky or a blank computer screen, you might see things floating across your field of vision. What are these moving objects, and how are you seeing them? Michael Mauser explains the visual phenomenon that is floaters.

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We feature a secure and friendly online shopping experience, providing free shipping


Welcome to our online store!  We feature a secure and friendly online shopping experience, providing free shipping. We’re now open for business, and we look forward to serving you all in the future. If you have any questions about this store or the products found within, please don’t hesitate to contact us any time. Feel free to browse our entire product catalog, and let us know if you have any questions.

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At Ametvist we want to ensure that you are 100% happy with your purchase.

. If you have technical or sales queries, do not hesitate to contact us.
. If after you attempted to resolve issues with Support staff and feel the product(s) you purchased does/do not the best fit your requirements, we want to make things right.

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On behalf of our entire team, thanks so much for stopping by. We look forward to providing you with the best possible online shopping experience on the Web.

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UFO on Route 21 New Jersey

UFO on Route 21 New Jersey, 14.09.2020

On September 14th, thousands of eyewitnesses saw a UFO over New Jersey area. The UFO which was about 30 meters across and hovered over various parts of the city. People were seen on the freeways pulling their cars over to the side of the road and watching this UFO in the distance. That fact, that the event took place is obvious from all the videos currently being uploaded as we speak. Hopefully, more videos will be uploaded in the next few days.

Was a UFO spotted in New Jersey on Monday September 14th , 2020?
Or could it be the blimp scheduled to fly that same day in New Jersey

Things introduced to the world for the first time

Things introduced to the world for the first time

There are many things in the world take place for the first time. These things are related to science, history, and human achievements, etc. Before you pictures of the World’s First things Created!


World's first computer
ENIAC, the world’s first digital computer that performed ballistics trajectory calculations for the United States Army

world's firs robot

world's first engine train

world's first camera

world's first X-ray

world's firs official Cricket ball

world's first battery

world's first motor cycle

world's first aeroplane

world's first guitar

world's first refrigerator

world's first accident

world's first Miss World

world's first car

world's first Telephone

world's first machine gun

world's first computer virus

world's first helicopter

world's first movie theatre

world's first body builder

world's first soccer ball
Lifehand 2 Develops Sensational Prosthetic

Dismemberment Plan: Lifehand 2 Develops Sensational Prosthetic

Remember at the end of “The Empire Strikes Back” when Darth Vader lops off Luke Skywalker’s hand? Just before the credits roll we see Luke in a medical bay with a droid testing the reflex sensitivity of an easily attached, new bionic hand. That science fiction always seemed awfully convenient. He could bounce back from dismemberment that easily? Well as of this week, reality is one step closer to that convenience.

In the February issue of “Science Translational Medicine,” researchers reported that Denmark’s Dennis Aabo Sørensen became the first amputee to experience feeling in real-time through a prosthetic hand. Obviously, losing a hand is both disabling and traumatic. Until now,  Sørensen’s worn a prosthetic that detects his muscle movements to open and close on objects. “Lifehand 2,” a collaboration between several European universities and hospitals worked with Sørensen to develop sensation in his artificial limb. The team is led by Silvestro Micera at the Ecole Polytechnique Fédérale de Lausanne Center for Neuroprosthetics.

The problem Micera’s team sought to address was a hand replacement that provided the same sensations we naturally perceive through contact, with the equivalent speed of our nervous system. By using a sensory-enhanced prosthetic that was surgically wired into the nerves of Sørensen’s arm, they found their solution.

In January 2013, a group of surgeons and neurologists implanted transneural electrodes into the ulnar and median nerves on Sørensen’s left arm. These electrodes are described as “ultra-thin” and “ultra-precise” so they can relay weak electrical signals directly into the human nervous system. Significant research was done beforehand to ensure these electrodes would work after Sørensen’s arm formed post-surgery scar tissue over them.

The arm electrodes were just one part of this bionic hand’s success. Micrea’s team translated tension in the hand’s artificial tendons into a coarse electrical current. Through computer programming, they transformed the signal into an impulse that Sørensen’s nerves could interpret. This signal travelled through wires from the hand to the electrodes. For safety reasons, the electrodes were removed from Sørensen’s arm after a month. But the “Lifehand 2” team thinks they could have been kept in there for several years. The arm however would require rigorous wound care to prevent infection.

Outside of this major breakthrough for amputees, consider the other applications of this science.
Micera already studies other neural interfaces to:

  • rehabilitate stroke victims,
  • assess fall risks,
  • assist the disabled with lightweight exoskeletons
  • and to gauge our human response to the “uncanny valley” facial expressions of humanoid robots.

But there’s transhuman value here as well, with possibilities for body modification replacements, or even extra limbs. Before we jump that far ahead though, Micera’s group intends to miniaturize the sensory feedback electronics so this prosthetic is portable. It will also require some fine-tuning to improve its tactile resolution.

We’re one step close to bionic hands and hopefully two steps back from maiming our children with laser swords.

Lots More Information

Spinning Vinyl Records with Peter Goldmark

Spinning Vinyl Records with Peter Goldmark

I remember watching an interview with Thurston Moore once, where he preached his devotion to vinyl. Moore’s theory was that every time you listen to a record, the needle digs a little more into the grooves, creating these tiny imperfections that make the sound slightly different with each play. In other words, vinyl records are more organic than other audio formats. Maybe that’s how Goldmark considered it as well.

Goldmark was born in Budapest, Hungary on December 2, 1906. He played cello as a kid but decided to be an engineer instead of a professional musician after he fled to Austria in 1919 to escape the Hungarian communist revolution. He studied there until graduating with a doctorate in physics 1931. Originally working for the British radio company Pye Radio, Ltd., he relocated to New York City with the oncoming threat of World War II. He failed to get hired at the Radio Corp. of America (RCA), but in 1936 CBS recognized his genius and brought him aboard.

Under the leadership of executive Bill Paley, Goldmark and a team of eccentric inventors worked in a lab, hidden away from the rest of the company. A future CBS research center president described Goldmark as a “crazy Hungarian inventor, somewhere in the building, and no one really kept track of what he was doing.” Remarkably, what he was doing was developing a color television set and the concept of video recording. His team created the field sequential system used to send primary colors to the viewers’ eyes. Debuting in 1940, Goldmark’s television made use of the red, green and blue (RGB) spectrum that we still use for color processing of digital images today. Unfortunately, not many black-and-white television owners accepted Goldmark’s design as the new color standard and RCA took the lead with another system more compatible with then-existing televisions.

Peter Carl Goldmark Engineer. Inventor. Hungarian.
Peter Carl Goldmark Engineer. Inventor. Hungarian.

Other colleagues described Goldmark as “pensive” and “part child and part tyrant.” Despite these disagreeable personality traits, CBS invested more than $3 million in his projects over the years. Before he turned from television to music, Goldmark even helped design a jamming device to interfere with German radar during World War II. CBS also used Goldmark’s research center to develop a secret satellite-reconnaissance program to spy on the Soviet Union from space.

By 1946 Goldmark turned his ingenuity to records. He loved classical music, but hated having to flip his 10-inch, 78-rpm shellac discs every few minutes. So his team tested different materials at different speeds on the phonograph and found an ideal with a vinyl compound played at 33 ⅓ rpm. These records used much smaller grooves at only 0.0003 of an inch (0.076 millimeters), allowing him to multiply the number of grooves, lengthening the playing time per side considerably. The advance revolutionized the music industry, creating the “album” as a format for mass-marketed pop music.

Shortly after the success of the LP, Goldmark (the crazy, hidden inventor) was promoted to vice-president at CBS. This didn’t slow down his productivity one iota. Co-workers described his drive as almost detrimental, excluding everything else, including his multiple wives and children. In 1950 he built a scanning system so photographs could be relayed from the Moon to the Earth. He turned back to televisions and improved his own design by placing phosphor dots directly on the inside surface of the device’s tube. Not long after that accomplishment he produced the Electronic Video Recording (EVR), the predecessor to VHS. His idea was that families would order high-resolution film EVR film cartridges to educate themselves. Goldmark used the “sex life of grasshoppers” as his demonstration video to clients.

In his later years, Goldmark turned his attention to America’s urban problems and believed a telecommunications network using his EVR system would enhance the education and cultural lives of all citizens. He died in 1977 before he could use his technology to affect social change. Still, one could argue that the advent of the LP alone distributed new music and ideas to places they’d never have been available before, triggering both the civil rights and anti-war social movements.


SOURCES

  • Brewster, Mike J. “Peter Goldmark: CBS’s In-House Genius.” BusinessWeek Online. 8/26/2004.
  • Carey, Jr. Charles W., “Peter Carl Goldmark.” American National Biography (From Oxford University Press). 2010.
  • Editors of Encyclopedia Britannica. “Peter Carl Goldmark.” Encyclopedia Britannica. Accessed online 4/24/2014. http://www.britannica.com/EBchecked/topic/237886/Peter-Carl-Goldmark
  • Hajdu, David. “The iPod Blues.” New Republic. Volume 230. Issue 11. 3/29/2004
  •  “At the End of the Rainbow.” Time. Volume 56. Issue 23. Page 54. 1950.
  • “The Genius at CBS.” Time. Volume 91. Issue 25. 12/20/1968

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