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Kin 260 Computer Applications for Kinesiology Majors Introductory Lecture Jackie Kiwata Introductions Tell us… • Your Name • Year in School • Favorite Website and Why? Overview • • • • Hardware Software Networks Security What do computers consist of? Best Buy ad for Sony Laptop Specs read: •Intel® Centrino® Duo Processor Technology Intel® Core™ 2 Duo Processor •Windows Vista™ Home Premium •1024MB DDR2 memory •160GB hard drive •Dual-layer DVDs and CDs •15.4" XBRITE-ECO™ Widescreen (VGN-N395E/B) The Processor • The brain of the computer • Interprets computer program instructions and processes data • Specs are given in terms of clock speed, cache and front side bus • E.g. 2.60 GHz (clock speed), 4MB L2 (cache), 800 MHz (bus speed) • Back in 2001, fastest PC specs: – 1.13 GHz Memory • Technically, it is any form of electronic storage • The faster the memory, the faster the overall speed of the computer RAM – Random Access Memory • Memory commonly refers to fast, temporary storage • DDR2 memory is a form of RAM that stands for double-data-rate 2 synchronous random access memory – Extremely fast type of temporary memory • What type of applications use memory? Hard Drive Examples of devices with hard drives: 1 TB 4 GB 20 GB Putting the numbers into perspective Symbol Name Kilobyte Abbreviation KB Value 1000 = 103 Megabyte Gigabyte Terabyte MB GB TB 10002 = 106 10003 = 109 10004 = 1012 Petabyte … PB 10005 = 1015 Display • 15.4" XBRITE-ECO™ Widescreen refers to the monitor – But monitors don’t work alone – Must also consider the Graphics card • High-end graphics cards have a chip and memory built on the card •The better the card, the better the display Computer Buying Checklist Decide on a price range that you can afford. Use the Web to read product reviews and get smart buying tips. Make sure you're buying from a reputable source. Buy as much RAM as you can reasonably afford. Don't get less than 128 MB. Get the biggest hard drive you can reasonably afford. Don't get less than 10 GB. You can cut costs by looking for a CPU that is a few steps behind the current cutting-edge speed processor. Don't get less than a 1.5 GHz processor. Make sure your machine has at least has a a DVD-ROM drive. If you can afford it, get a CD-RW burner. Consider buying a flat-panel monitor (also called LCD and TFT displays), which can offer a top-quality, no-glare picture. Software • 2 types • Systems Software – Low level programs that interact with the device at a very basic level • Applications Software – Programs designed for endusers Systems Software Example • Operating System • The purpose of an OS is to organize and control hardware and software on a device • May serve a variety of purposes, interact with users in complicated ways, and keep up with needs that change over time OS Examples Applications Software • Sits “on top of” systems software • Examples: Filename Extensions • When applications create files, the files are given a 3 or 4 character tag • This tag at the end of a filename indicates what kind of file it is • Common file extensions to know: Extension File Type Program .jpg, .gif, .bmp Image Files Photoshop, Paint .doc, .txt Text Editor Files Word .xls Spreadsheet Files Excel .ppt Presentation Files PowerPoint .pdf Page Layout File Acrobat, Reader .exe Executable File Any Program .html, .xhtml Web Files Browser, Text editor .mp3 Audio File Itunes, Real Player Networks • composed of multiple connected computers that communicate over a wired or wireless medium to share data and other resources • Main types of networks: – LAN: Local Area Network – WAN: Wide Area Network – Internetwork LAN • A network covering a small geographic area • High data-transfer rates • Use of ethernet technology to connect PCs WAN • A network covering a large geographic area (i.e. country-to-country or across continents) • Transmission through optic fiber provided by telephone companies Internetwork • Connects 2 or more LANS, WANS or LAN/WAN combination • Most notable example is the Internet – Requires the use of the Internet Protocol (IP) and Transmission Control Protocol (TCP) Why you need to protect your PC PC Security in a nutshell 1. Keep Antivirus software updated 2. Use a spyware, pop-up and spam blocker 3. Use a firewall 4. Make a rescue disk 5. Back up important data files regularly Antivirus Software • Programs that attempt to identify and eliminate malicious software • Scans files looking for known viruses • Identifies suspicious behavior from any computer program that might indicate infection • Issues? Blockers • Popup blockers – Usually a service provided by the Internet browser – Embedded in software Blockers (con’t.) • Spam blockers – Embedded in the email client – Incoming messages are passed through a filter and categorized as Safe » inbox Unsafe/Annoying » spam folder Blockers (con’t.) • Spyware blockers – Usually comes with antivirus software – Some ISPs will provide for extra $$ Firewall • Software that prevents unauthorized intrusion into a network • Inspects network traffic • Permits or denies entry to the network based on a set of rules More info • New PC Reviews: http://www.pcmag.com/ • Networks: http://en.wikipedia.org/wik i/Network • Security: http://pcworld.about.com /news/Oct292003id113175. htm