MADE Mobile Agents based system for Distance Evaluation - PowerPoint PPT Presentation

1 / 27
About This Presentation
Title:

MADE Mobile Agents based system for Distance Evaluation

Description:

Different weights given to different questions. Next question decided on the ... Compatible with CORBA and DCOM. Examination Process (Three Stages) Exam setting ... – PowerPoint PPT presentation

Number of Views:64
Avg rating:3.0/5.0
Slides: 28
Provided by: Vik44
Category:

less

Transcript and Presenter's Notes

Title: MADE Mobile Agents based system for Distance Evaluation


1
MADEMobile Agents based system for Distance
Evaluation
  • Vikram Jamwal
  • 99329009
  • KReSIT, IIT Bombay
  • Guide Prof. Sridhar Iyer

2
Contents
  • The application
  • Motivation
  • Domain
  • Existing Schemes
  • Distributed system structuring
  • Prevailing paradigms
  • Mobile agent approach
  • Mobile agent frameworks
  • Our model
  • Experimentation
  • Conclusions

3
Distance Evaluation
  • Emergence of distance education
  • Need for distance evaluation mechanisms
  • Alternatives to paper-based exams
  • Computer based and Internet based
  • Scheduled and uniform exams

4
Types of e-testing mechanisms
  • Where does the database reside?
  • Locally
  • Computer Based Testing (CBT)
  • Examples
  • GRE and GMAT
  • Remote
  • Internet based testing
  • Examples
  • www.eexam.com
  • www.netexam.com
  • Any Time exams

5
Computer Based Testing (CBT)
  • Different Question-Paper for each examinee
  • Generated dynamically
  • Adaptive
  • Different weights given to different questions
  • Next question decided on the basis of
  • difficulty level and
  • correctness of answer to previous question

6
Existing Internet Based Testing Schemes
  • Front End
  • Mostly HTML - form based
  • answers sent using GET and POST methods
  • Java applets, flash
  • Back End
  • CGI scripts
  • Java servlets
  • Security
  • Authentication done using login - password
  • May use https for secure exchange
  • Some issues
  • Web Servers are basically stateless

7
Important Points
  • Existing models are basically
  • Pull based
  • Client-Server
  • Extending Internet based evaluation techniques
  • Push model
  • Different kinds of content
  • Dynamic organization of content
  • Off-line examination V/S on-line examination
  • Subjective answers (not just objective)
  • Key technical issues
  • How to deliver the exam content?
  • How to evaluate the answers?
  • Our solution
  • Use Mobile Agents

8
Distributed System Structuring Mechanisms
Call to server procedure
Data
Client
Server
results
Procedure
Client Server
Procedure
Data
Client
Server
results
Remote Evaluation
Data
Client
Server
Procedure
Code on Demand
9
Procedure State
Data
Client
Server
Procedure State
Data
Server
Procedure State
Procedure State
Procedure State
Mobile Agents
10
How Mobile Agents Help?
  • Map directly to real life situations
  • Need a generic execution environment
  • Can work in both modes
  • push
  • pull
  • Can work off-line
  • Provide local interactions
  • Provide multi-hop solutions

11
Typical Mobile Agent Framework
Server
Laptop
System Resources
Data Base
Desktop
User Application
Legacy Software
Execution Environment Mobile Agent Service
Agent Application Agent Migration Local
Communication Global Communication
12
MAFs
  • Components
  • Life Cycle
  • Navigation
  • Communication
  • Security
  • Classification basis
  • Type of migration and code shipping mechanism
  • Agent tracking and directory service
  • Resource access control mechanism
  • Communication
  • Local, global, communicating partners
  • Systems Surveyed
  • 50 frameworks
  • Notable Aglets, Concordia, Voyager,
    Grasshopper, DAgents, Mole

13
Voyager - Our Choice
  • Better remote messaging
  • Generalized distributed object computing platform
  • Compatibility with latest java version
  • Easy creation of remote objects
  • Moving objects
  • relative and absolute
  • Other
  • Federated directory service
  • Different kinds of messaging (sync, one-way,
    future)
  • Object and agent persistence support
  • Distributed event handling
  • Security manager
  • Compatible with CORBA and DCOM

14
Examination Process (Three Stages)
  • Exam setting
  • examiners set the question papers
  • Distribution and testing
  • question papers are presented to the students
  • Evaluation and result compilation
  • answers are collected and results compiled
  • Design guidelines
  • Automate as much as possible
  • Simplify requirements of infrastructure at
    different ends
  • Reliability

15
Examination Setting Overview
16
Examination Setting Details
NS
Launcher
Controller GUI
NS Name Server N Paper Setter Node
Fetch Agent
Install Agent
Cloning
GUI
N-1
N-2
NS
NS
17
Dynamic Upgrade
18
Dynamic Upgradation
RemoteSetterGUI
FetchAgent
InstallAgent
NamingService
new RemoteSetterGUI()
register( )
getGUIName()
getGUIReference()
new EnhancePanel()
addEnhancePanel()
removeEnhancePanel()
19
Distribution and Testing
20
Evaluation and Result Compilation
21
Stage 2 and 3 Details
Examiner 2
Examiner 1
Paper Coordinator
Result Publishing Server
Answer Paper Agent
Evaluation Center
Objective Question Evaluator
Question Paper Courier Agent
Distribution Server 1
Distribution Server 2
Student- 1a
Student- 1b
Student- 2a
Student- 2b
22
Salient Features of the Design
  • Generic execution environments on each machine
  • Remote code installation
  • After distribution and before collection
  • The students work off-line
  • Agent creation by distribution servers
  • Not student machines
  • Workflow between examiners
  • Automated compilation of results

23
Measuring Response Times
24
(No Transcript)
25
Incorporating Dynamic Contents
  • MQPs can be organized into various skill levels
  • Once a person has finished one level, a new level
    2 can be sent

26
Conclusions
  • Mobile Agents provide effective and flexible
    mechanisms for structuring distributed systems
    like distance evaluation
  • Advantages
  • Student response times
  • Handling objective and subjective contents
  • Application level multicasting
  • Dynamic upgradation of applications
  • Support for heterogeneous execution environments
  • Centralized control and management of logistics
    and security of examination process
  • Some Issues
  • Reliability
  • Persistence
  • Security
  • Infrastructures

27
Questions ?Thank You ?
Write a Comment
User Comments (0)
About PowerShow.com