Acoustic levitation allows small objects, like droplets of liquid, to float. Unless you travel into the vacuum of space, sound is all around you every day. But most of the time, you probably don't think of it as a physical presence. You hear sounds; you don't touch them. The only exceptions may be loud nightclubs, cars with window-rattling speakers and ultrasound machines that pulverize kidney stones. But even then, you most likely don't think of what you feel as sound itself, but as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids, liquids and heavy gases to float. The process can take place in normal or reduced gravity. In other words, sound can levitate objects on Earth or in gas-filled enclosures in space.
Ever wonder how your camera knows what you're looking at? See more cool camera stuff pictures. Autofocus is that great time saver that is found in one form or another on most cameras today. In most cases, it helps improve the quality of the pictures we take. In this article, you will learn about the two most common forms of autofocus, and find out how to determine which type of autofocus your camera uses. You will also learn some valuable tips about preventing the main causes of blurred pictures when using an autofocus camera. How Do I Know Which Autofocus System My Camera Has? Is Autofocus Always Accurate and Faster? When Should I Use Manual Focus? Autofocus (AF) really could be called power-focus, as it often uses a computer to run a miniature motor that focuses the lens for you. Focusing is the moving of the lens in and out until the sharpest possible image of the subject is projected onto the film.
Yet the production of free radicals is not always a bad thing. They are part of the immune system. Help fight off infection. Antioxidants are the armament the body uses for protection against damage from free radicals. It is when the production of free radicals overwhelms the body's protective system of antioxidants that disease-producing damage results. The heart and the blood vessels, like the lungs, are especially vulnerable to the effects of oxygen because their exposure to this element is so great. The blood is the route of transport for oxygen throughout the body. The blood is also the route of transport for many of the substances that can act on oxygen to produce free radicals. Cholesterol is carried through the blood, packaged in LDL particles; LDL is responsible for depositing cholesterol in the walls of the arteries. These deposits form the fatty plaques that eventually narrow the arteries, possibly leading to a heart attack.|When a product or device fails, you need to know why. Root cause failure analysis helps a business get to the source of a product failure. More importantly, it provides the manufacturer with the information needed to address and correct the issue causing the failure. Root cause failure analysis is usually a multidisciplinary process. The tools NTS uses during an analysis include visual inspections, metallographic, environmental and chemical analysis and simulation tests. The specific tests utilized depend on the type of product and the failure mode. Root cause failure examinations are designed to determine the cause of the failure. The corrective actions needed to prevent it. However, product failure can be a complicated process. In our experience, device failure is rarely due to a single event. The physical signs of failure, such as a cracked metal component or a malfunctioning electronic device, are the most obvious. However these signs are often little more than symptoms of failure. NTS looks for the root cause of the failure.
Being a video game developer allows you to flex your tech skills while earning a nice paycheck. Video Game Developer - Your mother might have told you there was nothing to learn playing video games, but tell that to the folks who make them. More than 42,000 people in 36 states and Puerto Rico are employed by the booming U.S. Employment is up 30 percent since 2009, and the pace is more than 13 times faster than the rest of the labor market. Graphic Designer/Illustrator - Who said doodling can't lead anywhere? The field of graphic design employs about 260,000 people at a median salary of more than $44,000 per year. The top 10 percent of designers earn more than $77,000 per year. Astronomer - Stargazing types could potentially make good money figuring out the nature of the universe. As of 2012, astronomers and physicists earned a median income of $106,000 per year.
The publication of this information does not constitute the practice of medicine, and this information does not replace the advice of your physician or other health care provider. Before undertaking any course of treatment, the reader must seek the advice of their physician or other health care provider. Antioxidants include some vitamins and minerals, but to appreciate the value of antioxidants, you first need to understand the potential dangers of free radicals, a form of oxygen that has been chemically modified into a highly unstable substance. Free radicals are unstable because they are missing electrons, which must be replaced. So they seek out other compounds in the body. Steal electrons to restore stability. If the compound giving up its electrons is the fat and protein in an LDL-cholesterol molecule, the result is the formation of fatty lesions in the walls of the blood vessels -- the hallmark of atherosclerosis. For instance, they form in the normal course of the day, just by our breathing in oxygen.
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