Algorithm is a procedure for solving a mathematical problem in a finite number of steps that frequently involves repetition of an operation
broadly : a step-by-step procedure for solving a problem or accomplishing some end
The current term of choice for a problem-solving procedure, algorithm, is commonly used nowadays for the set of rules a machine (and especially a computer) follows to achieve a particular goal.
Polypropylene, a hard to recycle plastic, has successfully been biodegraded by two strains of fungi in a new experiment led by researchers at the University of Sydney.
It's a common plastic used for a wide variety of products from packaging and toys to furnishing and fashion, it accounts for roughly 28 percent of the world's plastic waste, but only 1 percent of it is recycled.
Neuroscientists confirmed that electronic addiction was "rewiring" the human brain, depleting attention span and degrading the quality of sleep. In fact, as they withdrew from the physical world into their texts and their tweets, adults could see the same things happening to themselves. The term "distracted parenting" was invented to describe the parent who could barely focus on his or her children anymore, certainly not to the degree required to enforce a few hours of abstinence from devices a day. And what good could a parent do when the schools themselves increasingly use laptops and iPads as instruments of learning? The small screens seems to have swallowed the world.
18-55mm f/3.5-5.6 means that the lens has a lens speed of f/3.5 at the 18mm focal length, but a lens speed of f/5.6 at the 55mm focal length.
EF-S 18-55mm f/3.5-5.6 IS II is a standard zoom offering a 28.8-88mm equivalent focal length range.
Lens speed refers to the amount of light that travels through the lens while the shutter is open. This is controlled by the size of aperture. The faster a lens, the larger the maximum aperture in the diaphragm and the more light will hit the sensor at the same shutter speed.
Focal length is the distance between the point of convergence of your lens and the sensor or film recording the image. The focal length of your film or digital camera lens dictates how much of the scene your camera will be able to capture.
Lens focal length tells us the angle of view—how much of the scene will be captured—and the magnification—how large individual elements will be. The longer the focal length, the narrower the angle of view and the higher the magnification, and vice versa.
Depth of field is the distance between the closest and farthest objects in a photo that appears acceptably sharp. Large apertures, which correlate to small f-stop numbers, produce a very shallow depth of field, and vice versa. Another important factor affecting depth of field is the distance between the camera and the subject. The shorter that distance, the smaller the depth of field.
