CHAPTER 6 & 7 Computers and Information Processing ...
Computer Hardware and Software Yong Choi School of Business CSU, Bakersfield Computer Hardware Comprehensive term for all the physical parts of a computer Tangible: things that you can actually touch and feel
disks, monitors, keyboards, printers, boards, speaker, and chips. Falling price of HW Technical driving force of the Information Age Computing Power
Faster Cheaper (PC: less than $500) Smaller Shorter computer product life cycle Storage Price of 1 MB hard drive space
1983 - $300 ** First PC in 1981 ** Early IBM PCs have 20 - 30 MB 1989 - $ 2, 1997 - $ .07, and today minimal Megabyte (MB) about 1 million bytes Gigabyte (GB) about 1 billion bytes Terabyte (TB) about 1 trillion bytes
Transmission I hr satellite teleconferencing 1985 - $100 1998 - less than $10 Today - minimal Internet dial-up service 1997: AVG. $40 DSL: less than $15
Hardware Trend More Multimedia Oriented. graphics, picture, sound, voice, video clip DMB Smaller, Smarter. Tablet PC (i.e., ipad), Smart phone
More powerful Massive parallel (process many tasks simultaneously) many networked CPUs vs. many tasks Computer Software Intangible: untouchable Written in various computer program languages C++, Java, VB.NET....
Set of instructions that hardware executes to carry out a specific task for you Changing of SW price More important than HW Y2K Two Major Categories of Software 1. Application software enables you to solve specific problems or perform specific tasks
APPA-8 Two Major Categories of Software 2. System software handles tasks specific to technology management and coordinates the interaction of all technology devices Two main types of system software
Operating system software Utility software APPA-9 Types of System Software Operating system software controls application software
and manages hardware devices Utility software provides additional functionality to your operating system Anti-virus Screen saver Etc. APPA-10
GUI vs. Command Driven DOS vs. Windows (i.e., XP, Vista..) User training Productivity Technical Compatibility
Demo of Command Driven Start programs accessories command prompt Try to delete sylacct360.ppt PowerPoint file from desktop (download and save the PPT file first) dir cd my documents or desktop (not case sensitive but space) dir (to see available files)
del sylacct360.ppt (dont forget the file extension) dir SW Considerations Compatibility with current software Outsourcing Off-the-shelf software More about computer
picotux - the smallest Linux Computer in the World Six Categories of Hardware Keyboard (input) CDs (storage)
Video card (connecting) CPU Cable modem (telecommunications) Monitor (output)
APPA-15 COMPUTER CATEGORIES (BY SIZE) PDA Notebook Tablet PC
Desktop APPA-16 CPU and RAM APPA-17 CPU and RAM
CPU and RAM work together to form the brain of your computer CPU speed measured in gigahertz (GHz) GHz number of billions of CPU cycles per second CPU (machine) cycle retrieve, decode, and execute instruction, then return result to RAM if necessary APPA-18
CPU Components Control unit directs what happens in the CPU and the rest of your computer Arithmetic logic unit (ALU) performs arithmetic, comparison, and logic operations CPU cache CPU memory where instructions wait until theyre needed CPU clock beats to keep instructions and information moving in synchronized fashion
APPA-19 System Bus System bus electrical pathways that move information between motherboard components, especially between CPU and RAM APPA-20
CPU and Ram at Work APPA-21 CPU (Machine Cycle) 1. Retrieve: The control unit sends to RAM for the instructions and information it needs 2. Decode: CPU gets the instruction out of cache and
examines it to see what to do 3. Execute: Does what the instruction says to do 4. Store: Sends the result of processing to be stored in RAM if necessary APPA-22 Notebook CPUs and RAM Mobile CPU type of CPU that changes speed, and therefore power consumption, in response to fluctuation in
use RAM for notebooks comes in smaller modules than RAM for desktops APPA-23 COMPUTER CATEGORIES (BY SIZE)
Minicomputers Supercomputer Mainframe APPA-24 Common Types of Flash Memory
Introduction Polymorphism "Program in the general" Derived-class object can be treated as base-class object "is-a" relationship Base class is not a derived class object Virtual functions and dynamic binding Makes programs extensible New classes added easily, can still be processed...
For example, red blood cells are surrounded by plasma. Plasma is made up of water, salts, sugars, and other particles. The concentration of these particles is kept in balance by osmosis. Water moves equally into and out of the cell....
Realists recognize flaws, limitations, and . flexibility . of . law and judges . must often make choices and consult their political and moral views. Law is what legal institutions are likely to do/not do
Figure 2. Electromyography (EMG) intensity for 7 shoulder muscles obtained at 20 percent endurance time window (black lines) and at 100 percent endurance time window (gray lines) of two speeds of wheelchair propulsion. Time zero indicates hands on pushrim.
Long live the king. France. At the time, Robert La Salle had no idea of just how large this area was. This now meant the "New France" was a vast empire. This "new france" ended up being the Louisiana Purchase...
signal decomposition is inverse problem Standard search is O(Nm) SVD search is O(Nm) SVD possible for any MxN matrix with M>N Dimension reduction: keep only a few singular values Arbitrary vector can be projected onto basis Different similarity measures emphasize...
Title: Control Unit Author: Jaejin Lee Last modified by: Sang Lyul Min Document presentation format: 사용자 지정 Other titles: Gill Sans ヒラギノ角ゴ ProN W3 Arial Georgia Bold ヒラギノ明朝 ProN W6 Georgia ヒラギノ明朝 ProN W3 맑은 고딕 굴림 Helvetica Courier New...
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