harddisk

harddisk keep data in disc with certain pattern that is called sector and track. track circle konsentris (concentric circles), while sector one part of the in track. stored data in it legible return by detect pattern.

track be bright coloured part that surrounds hard menyk, while sector little part dark coloured. a sector consist of byte certain, for example 256 or 512. collection several sector called with term cluster. track and sector made when hard menyk formattinged. hard menyk usually consist of a spindle that be centre or axis for amount of disc and often called also with term platter, place keeps data, platter motor, electronic series or circuit board, with cover casing that protect part component in hard menyk.
platter made from ingredient non-magnetik usually glass or alluminium and overlayed with magnetic layer. in kind hard menyk old fashion usually still to use iron oxide upon which
the magnetic. while hard menyk in this time majority use ingredient other, that is cobalt-based alloy.
moment hard menyk work, platter rolling with speed very tall. data is written and read into platter pass read-and-write head that present within call with surface platter, by detect and regulate magnetic level in surface platter quickly.
storage capacity in a hard menyk depend on total platter memilikinya. more and more total platter, so capacity hard menyk usually also ever greater. as description, hard menyk usually has three platter and six read-and-write head.
spindel hard menyk use air pressure in hard menyk to support part head so that can float when platter hard menyk in motion. environment outside linked to hard menyk pass puncture located in container hard menyk. hole very little with only ½ mm diameter.
by because use air pressure, hard menyk usually can not be operated at extreme height (above 3000 meter)s, for certain there hard menyk special for operation at height.

science

Science (from the Latin scientia, meaning "knowledge") is, in its broadest sense, any systematic knowledge-base or prescriptive practice that is capable of resulting in a prediction or predictable type of outcome. In this sense, science may refer to a highly skilled technique or practice.[1]


In its more restricted contemporary sense, science refers to a system of acquiring knowledge based on the scientific method, and to the organized body of knowledge gained through such research.[2][3] This article focuses on the more restricted use of the word. Science as discussed in this article is sometimes called experimental science to differentiate it from applied science, which is the application of scientific research to specific human needs—although the two are commonly interconnected.

Science is a continuing effort to discover and increase human knowledge and understanding through disciplined research. Using controlled methods, scientists collect observable evidence of natural or social phenomena, record measurable data relating to the observations, and analyze this information to construct theoretical explanations of how things work. The methods of scientific research include the generation of hypotheses about how phenomena work, and experimentation that tests these hypotheses under controlled conditions. Scientists are also expected to publish their information so other scientists can do similar experiments to double-check their conclusions. The results of this process enable better understanding of past events, and better ability to predict future events of the same kind as those that have been tested.

The ability of the general population to understand the basic concepts related to science is referred to as scientific literacy.