Week 3 Lecture Notes
Week 3 Lecture Notes IST 195 - M001
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Popular in Information technology
This 4 page Class Notes was uploaded by Alicia Notetaker on Wednesday September 16, 2015. The Class Notes belongs to IST 195 - M001 at Syracuse University taught by J. Rubin in Fall 2015. Since its upload, it has received 25 views. For similar materials see Information Technologies in Information technology at Syracuse University.
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Date Created: 09/16/15
Monday September 14 2015 IST 195 Week 3 Lecture Notes Binary Digit The bit 1 bit 2 values 1 or 0 2 bits 4 values 10 01 11 00 3 bits 8 values 000 010 001 011 100110111 101 4 bits 16 values 5 bits 32 values 6 bit 64 values 7 bit 128 values 8 bit 256 values also known as a byte Decimal vs Binary Any decimal number can be transferred to binary any binary number can be transferred to decimal EX137 2561286432168421 0 1 0 0 0 1 0 0 1 quotDrop your leading zeros meaning start with your first 1 Answer 10001001 ASCII 7 bit or 128 values Takes care of 09 AZ punctuation Uses chart of decimals to convert to binary Monday September 14 2015 UNICODE More than 100000 characters Universal character set Includes ASCII Practical Uses of RFID Radio Frequency Identification 0 Example EZ Pass It is a system that transmits the identity of an object or person wirelesst using radio waves It s an Automatic Identification Technology AutoID Other AutoID technologies are bar code systems optical character readers Two types of RFID tags L Passive Tags commonly used Does not need battery power Activates itself and transmits data using power generated by the radio waves from the RFID reader Usually less than 3 meters I Active Tags It is battery powered It has improved operating range Costs most then passive tags Ranger is greater than 100 meters and 100 MPH RFID Readers Built with an antenna for communicating radio signals with the RFID tags May have multiple antennas for sending and receiving radio waves Monday September 14 2015 Barcode vs RFID Barcode Require line of sight to be read Can only be read individually Cannot be read if damaged or dirty Can only identify the type of item Cannot be updated Require manual tracking and therefore are susceptible to human error RFID Can be read without sight of line Multiple tags can be read simultaneously Can cope with harsh or dirty environments Can identify a specific item New information can be overwritten Can be automatically tracked removing human error Cost RFID rags cost as little as 5 cents per tag Active tags can be more than 100 per tag Introducing BTLE Bluetooth Low Energy Continuous low power connection lndoor GPS alternative Your phone is currently connected to satellites and cell towers but what if your phone could talk to your laptop TV lights or your home Monday September 14 2015 Doesn39t need to connect with a deviceno action required Doesn39t waste battery iBeacon Protocol introduced by apple and now supported by iOS 7 Android Blackberry Let s developers take advantage of BTLE Your phone listens for a signal and wakes up when one is found In order to take advantage 1 An app needs to be downloaded and installed Bluetooth needs to be on App must be able to access location data PFJOPD App must be able to receive notifications iBeacon Possibilities Providing visitors to a museum with information about the art they are standing in front of almost like a selfguided tour Unlocking hotel door Getting around campus in and out of buildings Upgrading your seats sporting event concert