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Four Thirds logo. The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) design and development. [1] Four Thirds refers to both the size of the image sensor (4/3") as well as the aspect ratio (4:3). The Olympus E-1 was the first Four Thirds DSLR, announced and released in 2003.
The base of a reciprocating internal combustion engine is the engine block, which is typically made of cast iron (due to its good wear resistance and low cost) [22] or aluminum. In the latter case, the cylinder liners are made of cast iron or steel, [ 23 ] or a coating such as nikasil or alusil .
Military budget of China, USSR, Russia and US in constant 2021 US$ billions Military spending as a percent of federal government revenue. The military budget of the United States is the largest portion of the discretionary federal budget allocated to the Department of Defense (DoD), or more broadly, the portion of the budget that goes to any military-related expenditures.
The Linux kernel is a free and open source, [11]: 4 Unix-like kernel that is used in many computer systems worldwide. The kernel was created by Linus Torvalds in 1991 and was soon adopted as the kernel for the GNU operating system (OS) which was created to be a free replacement for Unix.
The cost of attendance per year is approximately $77,400. [115] However, 51% of full-time undergraduates receive financial aid covering 100% of their need. [ 116 ] The admit rate of Hopkins undergraduates to medical school is 80% and to law school is 97%, some of the highest rates in the US. [ 117 ]