Class Notes Weeks 7-10
Class Notes Weeks 7-10 INFO 1010
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This 9 page Bundle was uploaded by Alexandra Tilton on Wednesday November 18, 2015. The Bundle belongs to INFO 1010 at University of Denver taught by Professor Gisella Bassani in Fall 2015. Since its upload, it has received 89 views. For similar materials see Analytics 1: Data Management and Analysis in Business at University of Denver.
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Date Created: 11/18/15
INFO 1010 Data Management and Analysis Class Notes Mon 1102 Probability 0 Experiment 0 A controlled process that yields a wellde ned outcome 0 Sample Space All possible outcomes 0 Sample Point One outcome 0 Event Collection of sample points ie I m going to throw a group of coins 4 times 2 event 39 Pevent Sum of P sample points in event 0 Probability 0 A real number between 0 and 1 inclusive that tells us the percent of time an event should occur 0 O 2 never going to happen 0 1 2 always going to happen 0 How to determine probability 0 Counting classical 0 Number of ways to get 5 people in a row 0 5 5x4x3x2x1 0 Combinations and Permutations 0 Combinations Order doesn t matter 0 Permutation Order does matter 0 Guessing Subjective 0 Expert opinion we hope 0 People who should know Alexandra Tilton Page 1 of 9 INFO 1010 Data Management and Analysis Class Notes Mon 1104 Overview of Connected World 0 Network Categories 0 Local Area Network LAN Connects a group of computers in close proximity such as an of ce building school or home 0 Wide Area Network WAN Spans a large geographic area such as a state province or country 0 Metropolitan Area Network MAN A large computer network usually spanning a city 0 Network Providers 0 National Service Providers NSPs Private companies that own and maintain the worldwide backbone that supports the Internet 0 Network Access Points NAPs Traf c exchange points in the routing hierarchy of the internet that connects NSPs 0 Regional Service Providers RSPs Offer internet service by connecting to NSPs but they also can connect directly to each other 0 Network Access Technologies 0 Bandwidth The maximum amount of data that can pass from one point to another in a unit of time 0 Broadband A highspeed internet connection that is always connected Alexandra Tilton Page 2 of 9 0 Network Protocols Protocol A standard that specifies the format of data as well as the rules to be followed during transmission Transmission control protocol Internet Protocol TCP IP Provides the technical foundation for the public Internet as well as for large numbers of private networks Domain Name System Converts IP addresses into domains 0 Network Convergence Network Convergence The efficient coexistence of telephone video and data communication within a single network offering convenience and exibility not possible with separate infrastructures Unified Communication UC The integration of communication channels into a single service PeerToPeer P2P A computer network that relies on the computing power and bandwidth of the participants in the network rather than a centralised server Voice Over IP VoIP Uses IP technology to transmit telephone calls Internet Protocol TV IPTV Distributes digital video content using IP across the Internet and private IP networks 0 Bene ts of a Connected World Alexandra Tilton Sharing resources 0 Intranet 0 Extranet 0 Virtual private network Providing opportunities Reducing travel Page 3 of 9 Challenges of a Connected World 0 Networks create a diverse globally connected world eliminating time and distance 0 Networks make it possible to communicate in ways not previously imaginable 0 Challenges in security social ethical political issues Security 0 SSL Certificate An electronic document that confirms the identity of a website or server and veri es that a public key belongs to a trustworthy individual or company 0 Secure Hypertext Transfer Protocol SHTTP or HTTPS A combination of HTTP and SSL to provide encryption and secure identi cation of an Internet server Social Ethical and Political Issues 0 Digital Divide A worldwide gap giving advantage to those with access to technology 0 Personal Area Network 0 Personal Area Networks PAN Provide communication over a short distance that is intended for use with devices that are owned and operated by a single user 0 Bluetooth Wireless PAN technology that transmits signals over short distances between cell phones computers and other devices Wireless LAN 0 Wireless LAN WLAN A local area network that uses radio signals to transmit and receive data over distances of a few hundred feet 0 Wireless Fidelity WiFi A means by which portable devices can connect wirelessly to a local area network using access points that send and receive data via radio waves 0 Access Point The computer or network device that serves as an interface between devices and the network Alexandra Tilton Page 4 of 9 Wireless Access Point Enables devices to connect to a wireless network to communicate with each other Multiplein Multipleout technology Multiple transmitters and receivers allowing them to send and receive greater amounts of data than traditional networking devices Wireless MAN WMAN A metropolitan area network that uses radio signals to transmit and receive data Worldwide Interoperability for Microwave Access WiMAX A communications technology aimed at providing high speed wireless data over metropolitan area networks 0 Wireless WAN Cellular Wireless WAN WWAN A wide area network that uses radio signals to transmit and receive data Smart Phone Offers more advanced computing ability and connectivity than basic cellphones 3G A service that brings wireless broadband to mobile phones Streaming A method of sending audio and video les over the internet Satellite A space station that orbits the Earth receiving and transmitting signals from Earthbased stations over a wide area 0 Business Application of Wireless Networks Alexandra Tilton Radio Frequency Identification RFID Uses electronic tags and labels to identify objects wirelessly over short distances RFID tag An electronic identification devices that is made up of a chip and an antenna RFID reader RFID interro gator A transmitter receiver that reads the contents of RFID tags in the area Passive RFID tag Does not have a power source Page 5 of 9 Active RFID tag Contains a transmitter and a power source typically a battery 0 Radio Frequency Identi cation Semipassive RFID tag Uses a battery to run the microchip s circuitry but communicates by drawing power from the RFID reader Asset tracking Occurs when a company places active or semipassive RFID tags on expensive products or assets to gather data on the item s location with little or no manual intervention RFID accelerometer A device that measures the acceleration of an item and is used to track truck or taxi speeds Chipless RFID tag Uses plastic or conductive polymers instead of siliconbased microchips allowing them to be washed or exposed to water without damaging the chip 0 Global Positioning System Alexandra Tilton Global Positioning System GPS A satellitebased navigation system providing extremely accurate position time and speed information Automatic Vehicle Location AVL Uses GPS tracking to track vehicles Latitude Represents a north south measurement of position Longitude Represents a east west measurement of position Geocache A GPS technology adventure game that posts the longitude and latitude location for an item on the Internet for users to nd Geocoin A round coinsized object uniquely numbered and hidden in geocache Page 6 of 9 0 Estimated Time of Arrival ETA The time of day of an expected arrival at a certain destination and is typically used for navigation applications 0 Estimated Time of Enroute ETE The time remaining before reaching a destination using the present speed and is typically used for navigation applications 0 Geographic Information System GIS Consists of hardware software and data that provide location information for display on a multidimensional map 0 Cartography The science and art of making an illustrated map or chart 0 Edge matching warping rubber sheeting Occurs when paper maps are laid edge to edge and items that run across maps but do not match are recon gured to match 0 GIS map automation Links businesses assets to a centralised system where they can be tracked and monitored over time 0 Spatial data geospatial data or geographic information Identi es the geographic location of features and boundaries on Earth such as nature or constructed features oceans and more 0 Geocoding A spatial databases coding process that assigns a digital map feature an attribute that serves as a unique ID or classi cation 0 Location Based Services LBS Applications that use location information to provide a service 0 Bene ts of Business Mobility 0 Enhance mobility 0 Provides immediate data access 0 Increases location and monitoring capability 0 Improves work ow Alexandra Tilton Page 7 of 9 0 Provides mobile business opportunities 0 Provides alternatives to wiring 0 Challenges of Business Mobility 0 Protecting against theft Protecting wireless connections Preventing viruses on a mobile device Addressing privacy with RFID and LBS Wired Equivalent Privacy WEP An encryption algorithm designed to protect wireless transmission data 0 War Challlting The practice of tagging pavement with codes displaying where WiFi access is available 0 War Driving Deliberately searching for WiFi signals while driving by in a vehicle INFO 1010 Data Management and Analysis Class Notes Mon 1109 Probability Review 0 Counting Rule 0 Example one 6sided die and one 3sided die 36 18 0 Counting Rule 0 Example How many ways to get 5 books on a bookshelf 5 54321 Combination order does not matter Permutation order DOES matter Union 2 A or B Intersection A and B Mutually exclusive CANNOT happen at the same time Alexandra Tilton Page 8 of 9 INFO 1010 Data Management and Analysis Class Notes Mon 1109 Probability Review 0 Conditional Probability 0 Saying that the probability of A is GIVEN that B has already happened 0 Bayes theorem Alexandra Tilton Kind of like backwards conditional probability You know PB A but you want to know PA B You need four numbers P03 A PB AC PA PAC Page 9 of 9
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