Showing posts with label Science and Tech.. Show all posts
Showing posts with label Science and Tech.. Show all posts

10 Disruptive Technologies

Did the invention of the food dehydrator really change your life? How about the Internet? Some technologies have little impact on the world around us, while others are like major earthquakes on the seismographs of history. --Heather Whipps


10.) Magnetic Stripe Card
It's hard to imagine banking, shopping or traveling without the swish-swipe of a plastic card. Invented by IBM in the 1960s for a security system commissioned by the U.S. government, the strip relies on data encrypted in the form of tiny magnets. It is now one of the most universal technologies on earth.


9.) Gun Powder
Imagine the alchemist's surprise when a compound he mixed searching for eternal life nearly killed him instead! Chinese scientists first combined sulfur, saltpeter and charcoal in the 8th century and it wasn't long before someone thought to turn the mixture into a weapon. Warfare would never be the same.


8.) Iron Smelting
The Iron Age began at different times all over the globe starting around 1200 BC and, when it did, brought major changes to every day life. Both farming and war became easier with better tools. As a widely available ore across the ancient world, it also made trade less of a necessity and settlements more independent.


7.) Rubber
It drips from a tree like maple syrup, but the gooey liquid known as latex is much more important than the sweet stuff you pour on pancakes. The product was a mere curiosity when first discovered in the New World by European sailors, but became a hot commodity with the advent of the car. The automotive industry now uses nearly 70 percent of the world's rubber supply.


6.) X-Rays
Tell someone plucked from the past that you can look right inside the body without cutting it open and you'd be branded a wizard. X-ray technology had an enormous impact on the field of medicine right from its beginnings in the late 1800s, illuminating the diseases and disorders that lurked beneath patients' skin.


5.) Microprocessor
Once upon a time, an entire room was necessary to house one computer no more powerful than today's typical laptop. We live in a different era now thanks to the microprocessor (or CPU), that tiny beating heart of your desktop or laptop that just keeps getting smaller at the same time its gets more powerful.


4.) Electricity
Nobody is certain about the whole key, kite and lightning story, but Benjamin Franklin was part of the team effort to unravel the mystery of electricity in the 18th century, along with other great minds such as Edison, Tesla and Volta. The shift from the era of mechanization saw power become instant and easy to access.


3.) Nuclear Fission
In the 1930s, a handful of brilliant physicists figured out how to coax apart a teeny atom of uranium to produce energy of unimaginable magnitude. The discovery would lead directly to the nuclear bomb and change warfare forever (again). Nuclear fission isn't all doomsday and destruction, however; love it or condemn it, nuclear power plants also rely on fission science.


2.) Flight
With apologies to the balloonists and hang gliders of the 1800s, it was the Wright Brothers' twelve-second flight in 1903 that really set the world on a new course. Getting to another continent now takes a few hours, instead of weeks or even months. Flight has brought the planet together like nothing else, for better or for worse.


1.) The Internet
Most of us can remember that moment in the '90s when we first chatted online or listened to the blips and beeps of dial-up access. The technology behind the Internet was actually in place by the 1980s, but didn't gain a public face until the first "world wide web" site was published by Swiss-based laboratory CERN in 1991. The rest is history, which, like everything else, is all documented on the Internet.




source : livescience.com

10 Common Animation to Explain Complex Principles

Wondering how mechanical things work without getting too technical? Well here are some explanation using simple animations showing you how various mechanical principles work, like the car transmission, airplane turbine engine, sewing machines, gun loading  etc. Interesting and worth knowing.

Aircraft Radial Engine
Oval Regulation

Sewing Machine

Malta Cross Movement-second hand movement used to control the clock

Auto Change File Mechanism

Auto Constant Velocity Universal Joint

Gun Ammunition Loading System

Rotary Engine-an internal combustion engine, the heat rather than the piston movement into rotary movement


Car Engine Cylinders Diagram

Ten Things You Didn't Know About You



The human body is a great, sweaty, fluid-filled machine, moving and mixing chemicals with precision and coordination, making everything from memories to mucus. Here we explore some of the complex, beautiful or just plain gross mysteries of how you function.--Ben Mauk

10.) Your Stomach Secretes Corrosive Acid
There's one dangerous liquid no airport security can confiscate from you: It's in your gut. Your stomach cells secrete hydrochloric acid, a corrosive compound used to treat metals in the industrial world. It can pickle steel, but mucous lining the stomach wall keeps this poisonous liquid safely in the digestive system, breaking down lunch.
9.) Body Position Affects Your Memory
Can't remember your anniversary, hubby? Try getting down on one knee. Memories are highly embodied in our senses. A scent or sound may evoke a distant episode from one's childhood. The connections can be obvious (a bicycle bell makes you remember your old paper route) or inscrutable. A recent study helps decipher some of this embodiment. An article in the January 2007 issue of Cognition reports that episodes from your past are remembered faster and better while in a body position similar to the pose struck during the event.
8.) Bones Break (Down) to Balance Minerals
In addition to supporting the bag of organs and muscles that is our body, bones help regulate our calcium levels. Bones contain both phosphorus and calcium, the latter of which is needed by muscles and nerves. If the element is in short supply, certain hormones will cause bones to break down--upping calcium levels in the body--until the appropriate extracellular concentration is reached.
7.) Much of a Meal is Food For Thought
Though it makes up only 2 percent of our total body weight, the brain demands 20 percent of the body's oxygen and calories. To keep our noggin well-stocked with resources, three major cerebral arteries are constantly pumping in oxygen. A blockage or break in one of them starves brain cells of the energy they require to function, impairing the functions controlled by that region. This is a stroke.
6.) Thousands of Eggs Unused by Ovaries
When a woman reaches her late 40s or early 50s, the monthly menstrual cycle that controls her hormone levels and readies ova for insemination ceases. Her ovaries have been producing less and less estrogen, inciting physical and emotional changes across her body. Her underdeveloped egg follicles begin to fail to release ova as regularly as before. The average adolescent girl has 34,000 underdeveloped egg follicles, although only 350 or so mature during her life (at the rate of about one per month). The unused egg follicles then deteriorate. With no potential pregnancy on the horizon, the brain can stop managing the release of ova.
5.) Puberty Reshapes Brain Structure, Makes for Missed Curfews
We know that hormone-fueled changes in the body are necessary to encourage growth and ready the body for reproduction. But why is adolescence so emotionally unpleasant? Hormones like testosterone actually influence the development of neurons in the brain, and the changes made to brain structure have many behavioral consequences. Expect emotional awkwardness, apathy and poor decision-making skills as regions in the frontal cortex mature.
4.) Cell Hairs Move Mucus
Most cells in our bodies sport hair-like organelles called cilia that help out with a variety of functions, from digestion to hearing. In the nose, cilia help to drain mucus from the naval cavity down to the throat. Cold weather slows down the draining process, causing a mucus backup that can leave you with snotty sleeves. Swollen nasal membranes or condensation can also cause a stuffed schnozzle.
3.) Big Brains Cause Cramped Mouths
Evolution isn't perfect. If it were, we might have wings instead of wisdom teeth. Sometimes useless features stick around in a species simply because they're not doing much harm. But wisdom teeth weren't always a cash crop for oral surgeons. Long ago, they served as a useful third set of meat-mashing molars. But as our brains grew our jawbone structure changed, leaving us with expensively overcrowded mouths.
2.) The World Laughs with You
Just as watching someone yawn can induce the behavior in yourself, recent evidence suggests that laughter is a social cue for mimicry. Hearing a laugh actually stimulates the brain region associated with facial movements. Mimicry plays an important role in social interaction. Cues like sneezing, laughing, crying and yawning may be ways of creating strong social bonds within a group.
1.) Your Skin Has Four Colors
All skin, without coloring, would appear creamy white. Near-surface blood vessels add a blush of red. A yellow pigment also tints the canvas. Lastly, sepia-toned melanin, created in response to ultraviolet rays, appears black in large amounts. These four hues mix in different proportions to create the skin colors of all the peoples of Earth.



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