1. Job Fair Pervasive Computing System
Design Report
Project Team: Dec0912
Client:
Iowa State University
Faculty Adviser:
Daji Qiao PhD
Course Coordinator:
Jason Boyd
Team Members:
Adam Lee
Kartik Subbu
Nicholas Oakman
Gabriel Semonis

2. Problem/Need
Problem
Career fair management becomes complex given the large number of students and employers involved.
Long queues at certain employers lead to inefficient use of time.
Need
System to automate the selection process of which employer to visit next based on student and employer criteria and line lengths.

3. Proposed Solution
Create a system where students can “check in” at employer booths to inform centralized server (database) that he/she is waiting in that booth’s respective queue.
Provide students information such as in which order they should visit employer booths if they want to save time using a matching algorithm.

4. Operating Environment
Indoors (65-75˚F)
2000 students and 300 employers at any point
Windows Laptops
Pentium III
Internet Explorer or Mozilla Firefox Web Browser
802.11b/g, or combo Ethernet cards
Free and usable USB Slot
AC Power Available
120 Volts 60 Hz
Wireless Internet Available
Speed 11 Mbps to 54 Mbps

5. Deliverables Functional Prototype System (small-scale)
Developer-friendly and Reusable Code and Schematic
User Manual

6. Overall System Design

7. Actual System Layout

8. Physical System Components
Touchatag RFID readers
Touchatag RFID tags
Server
PHP script support
MySQL database
Terminal Computers (USB compatibility)
Employer Station Laptops

9. Touchatag RFID Reader Interface Constraints USB connection
Must have active internet connection
Online applications launched
Must be logged in to a Touchatag account
Frequency & Detection Range
Compatibility
Microsoft Windows
13.56MHz & < 4 cm
Mozilla Firefox
Internet Explorer

10. Touchatag RFID Sticker
Proximity card standard (High Frequency RFID (ISO 14443) used.
Tags only store their unique ID so all associations must be done on a higher level
Have adhesive on the back so can be easily attached to business cards. Temporarily could be appended to ISU card.

11. System Design Student Registration Employer Registration
Main Entrance Check-In
Employer Booths
Terminals

12. Student and Employer Registration
Prior to the career fair, a few things need to be done:
Tags must be associated with a unique ID independent of student who will obtain it later.
Students must input their information online to associate their username with their major, year, and interest (full-time or co-op)
Information of employers must be input based on what majors they accept, school year classification(e.g. junior, senior) they take, and type of position they offer (full-time or co-op)

13. Registration and Assoctiation
Student Pre- Registration
Student associates address with his information including: major, year, full-time/co- op selection
Student Tag Association
Student can, after entering the career fair, obtain a tag and associate it with their username using a password
Employer Registration
Associate employer ID with their job opportunities based on major, year, full-time/co- op offerings
Employer IP/Scanner Association
Associate Employers to IP addresses of laptops provided or their unique scanners

14. Students Adding Information
Students will go to a website, for example
Here they will be able to create an account based on their ISU username f.e “john doe” and then securely submit their major, year, and desired position to obtain a password used for entry through the main entrance check-in.

15. Employer Information
We will be able to input this information based on what information is already available from these employers.
This data will be added to the database before the fair starts.
Employer name
Majors
Grades
Opportunities
Apple Computer
Computer Engineering
Computer Science
Software Engineering
Junior
Senior
Full Time
Co- Op

16. Example of Employer Registation GUI
NOTE: The employer registration screen will be scripted using PHP

17. Example of Student Registration GUI
NOTE: The student registration screen will be scripted using PHP

18. Main Entrance Check-in
The main entrance check-in is a term used to describe arriving at the career fair and associating your tag with your username and password.
Authentication performed pertaining to the username and password that was obtained by registering earlier.
Since each tag is already associated with an ID, we can check the ID for a username association. If none, then we can simply prompt for a username and password. F.e.
Print out of list of most-suited employers to go to based on matching algorithm handed out

19. Associating ID with Tag
This procedure can be done using Touchatag’s easy to use interface on their “control panel”. We will configure each tag to be associated with a certain URL f.e.
This data will be used later throughout the career fair in associating the user with that tag.

20. Associating ID with Tag
Control Panel to associate tags to URL’s

21. Employer Station Checkin
This is the most important feature of our system. It is when a student swipes his RFID card to indicate that he is in a queue for an employer(updates database)
Functionality:
Check Into Employer Queue
Indirectly Check out of Other Employer Queue

22. Employer Station Checkout
After a student is done visiting a employer, there are 3 ways he can checkout:
Manually swipe the tag again, which will check whether he is currently in a queue and remove him from it.
Swipe into another booth, which will lower the number of students in the previous booth and enter him into the new booth
Timeout – after an hour he will be automatically checked out

23. Employer Station Dataflow

24. Matching Algorithm
The Matching Algorithm is used in three components of the system:
Main Entrance Check-In
Terminals
Text-Messaging System

25. Terminals
Terminals are several desktop computers with Touchatag readers positioned all across the career fair.
They query the database using the Touchatag reader to get employer list which can be printed.
Functionality:
Query for Next Visit List
Print Out Next Visit List
Indirect Checkout

26. Terminals Dataflow

27. Text Messaging System Alternative to Terminals
If student status in the database shows “checked out” of all employer queues text message passively sent to student using SMPT server.
Text message contains list of next best-suited employers based on the algorithm.
Students may opt for this service since receiving text messages costs money.

28. Test Plan Touchatag Testing Using multiple units Code Unit Testing
Testing boundary cases, invalid inputs, etc.
Server Stress Testing
Rapid and multiple requests to server simulations

29. Testing Requirements Testing the Touchatag
We will be testing the Touchatag system using more readers (currently working with two) and check for conflicts etc. when using single or multiple IDs.
Unit Testing on PHP code
Create simple test programs to run each function on the script, taking care to test boundary conditions and anomalies

30. Resource Requirements
Cost
Resource Requirements
Item
Number of Items
Cost
Explanation
Poster 1
$40
Touchatag Readers 3
$120
Employer Station Laptops
free
Borrowing, Checking out
Terminal Computers
Server Computer
CSG is letting us use one
Totals
$160

31. Conclusion
Using RFID technology, PHP scripts and MySQL database the system will help students visit more prospective employers by keeping track of how many people are in the various employer’s lines and sending students to the shortest line based on set criteria.

32. Questions???