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Tutorial on Web-Based Collaborative Tools Introduction. March 1 2001 ERDC Vicksburg Geoffrey Fox, Ahmet Uyar Florida State University Department of Computer Science and CSIT (School of Computational Science and Information Technology) 400 Dirac Science Library Tallahassee

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tutorial on web based collaborative tools introduction

Tutorial on Web-BasedCollaborative ToolsIntroduction

March 1 2001ERDC Vicksburg

Geoffrey Fox, Ahmet Uyar

Florida State University

Department of Computer Science and

CSIT (School of Computational Science and Information Technology)

400 Dirac Science Library

Tallahassee

Florida 32306-4120

fox@csit.fsu.edu

http://aspen.csit.fsu.edu/project/cctutorialjan01

topics to be covered i
Topics to be Covered I
  • 1. Introduction: What is a Collaboratory and Collaboration Technology; Tools, Standards, Portals
  • 2. Web Conferencing Tools (Centra, WebEx, PlaceWare, Latitude) + demos of Centra and PlaceWare
  • 3. Learning Management Systems (Blackboard and WebCT) + demos of Blackboard and WebCT using WebEx.
  • 4. Shared display in WebEx and VNC
  • 5 Management Tools: TMD (Training Management Database) and Virtual Classroom Manager (“NPAC Grading System”)
  • 6. Learning Object standards: IMS and ADL

http://aspen.csit.fsu.edu/project/cctutorialjan01

topics to be covered ii
Topics to be Covered II
  • 7. Authoring and Authoring Standards from Macromedia, Adobe, .. Flash, SVG, VML, OpenOffice.org
  • 8. HearMe Voice over IP including demo
  • 9. Access Grid high end audio-video conferencing
  • 10. Instant Messengers (Yahoo, MSN, AOL, Jabber)
  • 11. Calendars and Schedulers
  • 12. Palmtop Interfaces and Comments on Palmtop Technology
  • 13. Portals for education and computing.

http://aspen.csit.fsu.edu/project/cctutorialjan01

what are we trying to do i
What are we Trying to do I?
  • Build web-based support for people to interact with each other and with other resources: computers, documents, instruments
  • This was originally called a Collaboratory by Bill Wulf in a famous Science article in volume 261, 13 Aug 1993
  • We must do this while technology is rapidly changing and while we are not certain what collaborative tools, scientists will actually use i.e. requirements are not known
  • We will find a set of successful capabilities where some consensus exists as to what they do and how they look to users – these are typically (now) commercialized
  • There are some clearly useful technologies and standards on which to build – we will mention these en passant
  • Need to identify those areas where there is a potential requirement and Industry will not provide (or render our solution invalid) in next year or so

http://aspen.csit.fsu.edu/project/cctutorialjan01

what are we trying to do ii
What are we Trying to do II?
  • Object Web technology suggests how systems ought to built today
    • Program in Java
    • Data Structures in XML
    • Use multi tier architecture
  • There are some important internet trends which suggest where systems will go –
    • Bandwidth and latency of networks (Gilder’s law)
    • growing use of Palmtop devices
  • Advising you as to what systems work and how to support them
  • Discussing differences and similarities between support of training, administration and research

http://aspen.csit.fsu.edu/project/cctutorialjan01

collaboratory applications
Collaboratory Applications
  • Distance Education including advanced seminars and training
  • Help Desk including
    • Microsoft helping user debug problem on home PC (connected to Internet)
    • MSRC consulting staff interacting over distance in real time with a user with a program bug
    • Yahoo staff asking in depth questions from users browsing either their knowledge or Shopping sites
  • Scientists brainstorming difficult research issues in distributed locations
  • Virtual communities around the world from children chatting to each other or integration of distributed organizations (like ARL)
  • Indian Nation remaining in their homeland but participating electronically in modern economy (digital.indigineousworld.org)
  • Implementing next round of PET activities
  • Crisis Management and Command and Control for Military

http://aspen.csit.fsu.edu/project/cctutorialjan01

basic principles in building systems
Basic Principles in Building Systems

Object 1

Object 2

  • Everything electronic is by definition an Object
    • Some objects are easier to deal with than others
  • All (systems) software will be written in Java
    • As it has best software engineering properties
  • All Object (meta)data and data streams will be defined in XML
    • Whether you use COM, CORBA, Jini/RMI, SOAP, HLA Object Model
  • All Systems built in multi-tier fashion so front end rendering and back end functionality are disassociated

XML Datastream

XML Interfaces

http://aspen.csit.fsu.edu/project/cctutorialjan01

object web portals think of things as objects and services
Object Web Portals think of things as objects and services

System View

User View

RenderingEngine

CORBA or Java

Broker or Server

Objects

XML Requestfor service

followed byreturn of XMLresult

XML

Browser(HTML)

RenderingEngine

Universal Interfaces

IDL or XML

“Computing Portals”portalML Interface

www.computingportals.org

“Grid Forum”resourceML Interface

www.gridforum.org

http://aspen.csit.fsu.edu/project/cctutorialjan01

use of object technology in computing i
Use of Object Technology in Computing I
  • Basic Principle: Use object technology wherever possible
    • This will give you a more productive development environment which are easier to maintain
  • Objects can be used at different granularities
  • Fine and Very Fine Grain
    • The computational kernel
    • The linkage of different kernels as different routines
    • Characterized by low latency (memory access or subroutine call or at worst MPI invocation) -- a few nanoseconds to a microsecond
    • Object technologies are not essential here although eventually languages like C++ and Java will be preferred solution here
      • Maybe you have a lot of legacy Fortran code in this category
      • Converting to Java is probably not the best use of scientists’ time

http://aspen.csit.fsu.edu/project/cctutorialjan01

use of object technology in computing ii
Use of Object Technology in Computing II
  • Coarse Grain objects characterized by modest latency ( but maybe high bandwidth) are where you use Object web technology immediately
    • All programs, sensors, datasets, simulations are objects
  • There are many competing object models -- Java, COM, CORBA, SOAP but doesn’t matter -- use XML to define all objects -- we can convert
    • Data format is not 16I5 or 8F10.4 or even a Java or C++ data structure -- it is defined in XML. This ensures interoperability between sensors and programs
  • Objects can have multiple views -- Oracle can think in rows and columns; the user as a correlated time series -- Internet technology filters convert very easily
  • Each Science field should set these XML based coarse grain object standards for its area
    • IMS and ADL are doing this for education and training. Thousands of other efforts

http://aspen.csit.fsu.edu/project/cctutorialjan01

example of xml specifying a program as an object
Example of XML Specifying a Program as an Object

<?xml version="1.0"?>

<!DOCTYPE application SYSTEM "ApplDescV2.dtd">

<application id=”Casc2d" installable="No"> selected application

<target id="aga.npac.syr.edu"> selected host

<status installed="Yes"/>

<installed>

<CmdLine command="/npac/home/haupt/CASC2D/casc2d" />

<input>

<inFile Path="/npac/home/haupt/CASC2D/lms/" Name="sand.map"/>

<source Host="maine.npac.syr.edu" Path="C:\LMS\fromEdys\" Name="S.map" >

</input>

<output>

<outFile Path="/npac/home/haupt/CASC2D/lms/" Name="sed.out"/>

<dest Host="maine.npac.syr.edu" Path="C:\LMS\toEdys\" Name="sed.out" >

</output>

<stdout Host="aga.npac.syr.edu" Path="/npac/home/haupt/CASC2D/history/" Name="job2001.out" >

<stderr Host="aga.npac.syr.edu" Path="/tmp/" Name="haupt_job2001.err" >

</installed>

</target>

</application>

how to run it

it expects this input file

it generates this output file

Actual location of the file

store it permanently here

save stdout

and stderr

http://aspen.csit.fsu.edu/project/cctutorialjan01

aspects of collaboration
Aspects of Collaboration
  • Collaboration means Sharing and we identify three classes of capability
    • Share the people: Audio/Video Conferencing
    • Basic Tools: email, Instant Messenger, Bulletin Boards, White board
    • Shared resources i.e. shared objects (Basic tools are special case where object is a text message or simple drawing)
  • Objects can be shared in several ways
    • Shared display
    • Shared export
    • Shared event
  • Which trade off ease of use versus flexibility versus ease of implementation
  • If we share objects and we have a lot of them, then we must have management capabilities so we can store and retrieve them
    • Management issues have special needs in some areas e.g. store grades and homework in learning systems

http://aspen.csit.fsu.edu/project/cctutorialjan01

collaborative visualization
Collaborative Visualization

Output

Filter

Map

Transform

Shared “events”

Event

Adapter

Object

Broker

A

Input

Custom

W3C

Input

Filter

Map

Transform

Event

Adapter

Object

Broker

B

Output

Master User BCollaboratorsA and C

SharedDisplay

Output

C

  • Consider a computer program (object above) and then its output and input wend their way through multiple filters(tiers) until they are finally rendered onsome sort of device: CAVE through PDA.
  • One can share “object” at any stage in pipeline

http://aspen.csit.fsu.edu/project/cctutorialjan01

architecture of collaboration i
Architecture of Collaboration I
  • The web is full of objects – web pages sitting on web servers – and these support asynchronous collaboration
    • You post a web page and I later look at it in my own time
  • Replacing web document by a “CGI script” or servlet (web interface to program, database etc.) gives general multi-tier object sharing
  • This is Publish/Subscribe mechanism
    • If add some mechanism (automatic email or word of mouth) to tell viewing client when new information is posted
    • We use JMS (Java Message Service) as Industry standard for publish/subscribe systems
  • Synchronous Collaboration provides “real-time” notification and automatic update of changed objects

http://aspen.csit.fsu.edu/project/cctutorialjan01

architecture of collaboration ii
Architecture of Collaboration II
  • All forms of Collaboration are Event based
    • Different modes: Display, Export, “Event” correspond to events generated at different places in object rendering pipeline
  • Shared Display – Events contain updates to frame buffer
  • Shared “Event” – Events contain updates to state of either original or transformed object
  • Shared Export – Convert (rendering of) object to some standard form that is more flexible than bitmap of Shared Display. Build a custom sharing for this exported form
    • WebeX uses “patented sharing of virtual printer” which is equivalent to sharing export to PDF
    • I like shared HTML (web pages) or SVG described later

http://aspen.csit.fsu.edu/project/cctutorialjan01

architecture of collaboration iii
Architecture of Collaboration III
  • Objects are all “copies” of each other with events maintaining state
  • Result can be identical or different renderings – e.g. one can choose on subscribing client to resize rendering to a larger (so can see) or smaller (as PDA) size

Pub/SubServer

Receive eventson subscribedchannels

PostEvents

Subscribe

Exported

Object

SubscribingObject II

SubscribingObject I

http://aspen.csit.fsu.edu/project/cctutorialjan01

architecture of collaboration iv
Architecture of Collaboration IV

Exported

Object

Original

Object

  • For each collaborative model, we are sharing and replicating an object
  • We just need to choose which version of original object to use

This is replicated between

each collaborating client.It is “frame buffer”,“original object”,Web/SVG/PDF/.. Exportfor Shared display, eventand export models

Render

Export

http://aspen.csit.fsu.edu/project/cctutorialjan01

requirements of collaboration i
Requirements of Collaboration I
  • We have learnt a lot from our own experiments (systems called Tango (synchronous) and WebWisdom/Virtual Classroom Manager (asynchronous))
  • and from study of commercial models
    • WebeX Centra and Placeware (and others) have evolved to more or less identical synchronous models
    • Yahoo, Excite, NetCenter are asynchronous information portals
    • WebCT and Blackboard are asynchronous education portals
  • There are technology trends of importance
  • Abstract some lessons and requirements for (future) systems

http://aspen.csit.fsu.edu/project/cctutorialjan01

technology trends and principles
Technology Trends and Principles
  • All performance and capability measures of infrastructure continue to improve
  • Gilder’s law says that network bandwidth increases 3 times faster than CPU Performance (Moore’s Law)
  • The Telecosm eclipses the Microcosm ….

George Gilder Telecosm :How Infinite Bandwidth Will Revolutionize Our World

(September 2000, Free Press; ISBN: 0684809303, #146 in Amazon Sales Jan 15 2001)

http://aspen.csit.fsu.edu/project/cctutorialjan01

small devices increasing in importance
Small Devices Increasing in Importance

CM5

  • There is growing interest in wireless portable displays in the confluence of cell phone and personal digital assistant markets
  • By 2005, 60 million internet ready cell phones sold each year
  • 65% of all BroadbandInternet accesses via non desktop appliances

http://aspen.csit.fsu.edu/project/cctutorialjan01

palm tops help define client model
Palm Tops help define Client Model
  • One needs to design web systems so they can be accessed from either a PDA or a PCor a Powerwall
  • This implies that only code in browser should be that immediately needed to relay events between user and web system – all “logic” (state) should be outside browser.
  • Supports Server based Computing model with clients “just” for rendering

http://aspen.csit.fsu.edu/project/cctutorialjan01

requirements of collaboration ii
Requirements of Collaboration II
  • Need to support both synchronous and asynchronous models in an integrated fashion
    • Some think asynchronous web based education will replace conventional methods
    • Maybe role of synchronous (teacher-student interaction) shifts from lecturing to mentoring
    • Implies need to archive synchronous sessions for later replay
    • Implies build collaborative portals
  • Need to support PDA and PC seamlessly
    • Define content in XML and use style-sheets or other transformation tools to map into HTML (PC) or WML (PDA)
    • This is part of portalML
  • Collaboration implies sharing objects – the better object structure exposed, the better sharing is possible
    • So define everything you can in XML (ResourceML)
    • We can share Word/PowerPoint best in Web or SVG form as this is universal export. Could build a custom office sharing tool but hard

http://aspen.csit.fsu.edu/project/cctutorialjan01

requirements of collaboration iii
Requirements of Collaboration III
  • Predict that future will see higher quality web pages as Web allows more competition (e.g. between education providers)
    • So need to understand how to share pages written with Macromedia Flash and other high end authoring tools
  • Need to migrate to evolving standards whether “sure things” like SMIL (multimedia) or W3C Universal Access or possibles like OpenOffice or WML
  • Must assume all commercial and indeed academic products will evolve (rapidly) and so generic collaboration framework strongly preferred
  • Special requirements of Science and HPCC
    • Share Mathematics (MathML) and other science symbols (e.g. molecules) in scientific whiteboard etc.
    • Share Computing (submit jobs, visualization etc.)

http://aspen.csit.fsu.edu/project/cctutorialjan01

summary of architecture
Summary of Architecture
  • Multi-tier with resourceML to define Objects and portalML to define client server interface and dissociate Object and its rendering
  • Server side logic to allow range of clients and exploit increasing network bandwidth
    • Automatically gives universal archiving
  • Publish/Subscribe can be used as universal mechanism for synchronous and asynchronous collaboration
    • “only” need latencies of fractions of a second as this built already due to browser update time, long distance transmission time etc. (JMS latencies around 0.1 second for modest size message going from publisher to subscriber)
    • Will need multicast (not in JMS) to scale to lots of clients
  • Naturally supported by event based model of computing with all transactions expressed as time stamped messages (events) which are archived and forwarded by middle tier

http://aspen.csit.fsu.edu/project/cctutorialjan01

mypet portal interface
myPET Portal Interface
  • Yahoo Messenger is an interesting model for the myPET or more generally myProfessor (Education) or myHPCC (general computing) interface
  • “Small” Application that invokes browser
  • Runs on PC or Palmtop and “only” contains summary information suitable for Palms – can we use Java (J2ME)
  • Has services like file manipulation, send a message and set of custom buttons
    • Access News, Weather, Stocks etc.
  • Develop myPET with computers, papers, programs and sensors instead of news and stocks
  • Develop myProfessor with school events, classes etc.

http://aspen.csit.fsu.edu/project/cctutorialjan01

typical virtual class meeting room
Typical Virtual Class(Meeting)room
  • Invoke this from myACES or myProfessor
  • See Centra, Placeware, WebEx….

Control buttons for Audio/Video/Floor Control etc.

Lecture Page

Annotations

(student, teacher)

Pointers etc.

index

Alert/Raise Hands

Chat Room

Invoke Quiz

http://aspen.csit.fsu.edu/project/cctutorialjan01

typical myprofessor interface
Typical MyProfessor Interface

My Professor

Log Out

Main Menu

My Courses

Home

Courses

Edit

Intro To Java

Visible

Schedule

Next Class: Thursday, 9/14/2000, 4 pm

Message: 5 new, 2 unread, 15 total

View

Messages

To Do’s

Edit

Java: Swing

Agents

Next Class: Thursday, 9/14/2000, 2 pm

Message: 0 Total

Preferences

View

Profile

Edit

Java: AWT

Now

Next Class: Tuesday, 9/12/2000, 1 pm

Message: 1 new, 0 unread, 3 total

Today

View

8

Announcements & News

FSU announces 50 new online courses.

9

New speech recognition spanish course available.

10

11

Alerts & Notifications

Your Java: AWT class starts in 3 min.

12

Routine maintenance for 9/16 @ 1:00 am

13

Java: AWT

14

ScheduleSeptember, 2000

15

View

16

Month

Week

Su

M

Tu

W

Th

F

Sat

17

Activity

1

2

18

3

4

5

6

Add

7

8

Del

9

10

11

12

13

14

15

16

2 alerts

6 new msgs

17

18

19

20

21

22

23

24

25

26

27

28

29

30

  • Messages will give you access to email, instant messenger, voice messages, alerts etc.
  • Agents scan for useful resources you requested e.g. news about Enterprise Javabeans
  • Calendar and Scheduler supports CDIS, CAP and CIP data Interchange, access and Interoperability standards (see iPlanet Calendar Server 2.1)

http://aspen.csit.fsu.edu/project/cctutorialjan01

synchronous virtual environments
Synchronous Virtual Environments
  • Several similar systems offering shared display and shared export (for PowerPoint)
    • Commercial: WebeX Centra Placeware Latitude NetMeeting
    • Public Domain: VNC shared display
  • Limited functionality in areas of archiving, export models, management and PDA support
  • VNC designed for “different problem” – client doing administration on multiple remote machines and not optimized for one master and lots of clients
  • Audio-Video Support limited – Centra has built in Windows audio (with Java front end). WebeX using Lipstream and perhaps HearMe
  • Have built in shared annotation of display and chat/whiteboard tools

http://aspen.csit.fsu.edu/project/cctutorialjan01

commercial collaboration and training systems i
Commercial Collaboration and Training Systems I
  • October 19 2000: WebEx Communications, Inc. the leader in communications infrastructure for Web meetings, today announced record results for its third quarter, ending September 2000. WebEx added more than 700 new customers this quarter, bringing the total number of customers to more than 1800.
  • During the third quarter, AT&T and Global Crossing announced the integration of WebEx services into their communications solutions, and Commerce One announced that WebEx services have been integrated into their next generation Commerce One.netTM. WebEx's list of new customers this quarter contains industry leaders in aerospace, automotive, computer software, computer hardware, consulting services, financial services, healthcare, real estate and legal services. New customers include 3-M, Aberdeen Group, Ace Hardware, Altera, Associated General Contractors (ACG), BancTec Inc., Blue Martini, Briggs & Stratton, Brown Brothers Harriman & Co., CheckFree Corp., Cosine Communications, Emory University, Enron Energy Info Solutions, Fiserve, Inc., FleetBoston Financial, Forrester Research, Grubb & Ellis, Hewlett-Packard, Keystone Solutions, Kyocera Wireless Corp., Medtronic, Motorola, NEC America, Nexprise, Proxicom, Razorfish, Sunguard, Toyota Motors, Wilson Sonsini Goodrich & Rosati, ZDNet and Ziff-Davis among others.

http://aspen.csit.fsu.edu/project/cctutorialjan01

commercial collaboration and training systems ii
Commercial Collaboration and Training Systems II
  • Oct. 12, 2000-- Centra the world's leading provider of software infrastructure and ASP services for live eLearning and Internet business collaboration, today announced results for the third quarter and nine months ended September 30, 2000.
  • Centra added 73 new customers in the third quarter, bringing the total customer base to 350 accounts. Some highlights include:
  • Centra continues to grow its extensive customer base, serving more than one million users across all industry sectors and geographies. Contributions to this rapid growth in the third quarter were highlighted by:
  • The selection of Centra by Andersen Consulting, one of the world's largest professional services firms, as the company's standard infrastructure for the delivery of live eLearning to the company's 65,000 employees.
  • A significant initial deployment at Coca-Cola Company, the world's largest soft drink provider with over 35,000 employees, to provide eLearning delivery infrastructure for global SAP end user training and ongoing change management initiatives.
  • Siemens AG selected Centra as the corporate eLearning and collaboration standard to support communications and planning among the company's top 1,500 global operations executives. In addition, Siemens, which operates in over 190 countries, will use Centra to support their extensive SAP rollout through hands-on end user training over the Internet.

http://aspen.csit.fsu.edu/project/cctutorialjan01

learning management systems
Learning Management Systems
  • Learning Object standards ADL and IMS from DoD and education community
  • Most education and training stresses asynchronous or web support for conventional delivery
  • WebCT Blackboard Lotus(IBM) and others offer LMS systems with limited synchronous capability
    • Support typical educational needs like grading, quizzes, homework, glossaries, group email
    • Varying database backend and
    • Varying authoring support
  • Popular with colleges as supports not so expert faculty
  • DoD use less clear as don’t need homework etc.
  • No built in support for areas like “programming labs” (VPL from NPAC did this)

http://aspen.csit.fsu.edu/project/cctutorialjan01

learning management tools
Learning Management Tools
  • “Integrated solutions” have problem that cannot compete well in any one area
    • E.g. Blackboard (initially) did not support Java applets in curriculum pages
    • Quizzes do not support (yet) CAPA capabilities to personalize them (http://capa4.lite.msu.edu/capa-bin/class.html)
  • We mention two projects built at NPAC with focused capabilities
    • TMD supports training at ASC
    • Virtual Classroom Manager (Mehmet Sen Thesis) which was used for several years in PET to support classes for homework and grading with very simple quizzes
  • Instant Messenger and Calendar/Schedulers are other generic tools which can be used if you adopt modular approach

http://aspen.csit.fsu.edu/project/cctutorialjan01

learning objects
Learning Objects
  • Given changing technology, need standards to protect investment in authoring and administrative data generated and stored in databases
  • Educational Environment Educause set up IMS – http://www.imsproject.org Instructional Management System with selection of companies and universities
    • IMS focus was changed to drop implementation work and is now “Global Learning Consortium” Inc.
  • Department of Defense (which has huge training needs) set up ADL Advanced Distributed Learning Initiative
    • www.adlnet.org whose links section includes all other useful URL’s
  • IEEE (Computing Community) set up P1484 Learning Technology Standards Committee LTSC

http://aspen.csit.fsu.edu/project/cctutorialjan01

lms model used by adl
LMS Model used by ADL

LearningServer

Content Server(s)

External systems:

“Learning

HR, E-Commerce, ERP...

Management

Course

Interchange:

System”

Course

LMS

Structure

Format (CSF),

Metadata

Migration

Adapter

Services or Adapter

Learning Server

Adapter

Server Side

Runtime

Client Side

Environment:

Launch, API,

Browser

Data Model

API

Adapter

Application

HTML+

Critical InterchangeCapability

Server

Client

http://aspen.csit.fsu.edu/project/cctutorialjan01

areas object properties covered
Areas (Object Properties) Covered
  • Metadata from IEEE and IMS
    • Roughly Properties of educational objects thought of as “documents” (author, title …)
  • Course Packaging from SCORM and IMS
    • How to form bigger units of instruction from smaller units
    • Called Content Packaging by IMS and Course Structure Format (CSF) by SCORM which goes in greater depth than IMS
  • Tests and Quizzes from IMS
  • Specialized CSF descriptors from SCORM (via CMI)
    • Such as objectives, prerequisites, completion requirements
  • LMS Runtime API from SCORM – I am doubtful about value
  • Enterprise Properties from IMS
    • Link to people and organization databases (rather incomplete at present but must be important as probably can agree)

http://aspen.csit.fsu.edu/project/cctutorialjan01

audio video conferencing
Audio-Video Conferencing
  • In Tango training, audio-video conferencing was always problematical
    • Video may or may not be necessary – Internet only supports “postage stamp” talking heads
    • Audio only requires a few kilobits per second but quality of service critical and not likely to be supported on current Internet
  • HearMe desktop audio: Support general mix of internet and “ordinary” phone lines which have:
    • Quality of service and good echo canceling etc. on high-end phones
    • Should work with modem (28.8 kilobits per second)
  • Access-Grid community audio/video: Supports multiple high-quality audio and video streams
    • Each client client needs 20 megabits per second

http://aspen.csit.fsu.edu/project/cctutorialjan01

authoring
Authoring
  • Authoring on the Web can include
    • Basic HTML
    • Macromedia/Adobe/etc. packages like Fireworks, Dreamweaver, Illustrator
    • PowerPoint and Word exported
  • Also can include RealNetworks or Microsoft or .. Format Multimedia
    • Note Streaming multimedia formats have larger buffers than A/V conferencing formats
  • Pressure to improve web quality
  • Training and Education need a lot of material and so custom editing of each page not practical
  • Using XML to specify content and include this in beautiful framework seems best
  • SVG and SMIL are 2D vector graphics and multimedia standards
    • HTML does not give reproducible pages
    • Flash can be thought of as “proprietary SVG”

http://aspen.csit.fsu.edu/project/cctutorialjan01

hand held internet
Hand Held Internet
  • So we will have convenient hand-held devices linked to the “wireless internet”
  • Wireless Internet is basically the same as conventional Internet except that content is optimized for size and communication limitations of wireless systems
    • Current bandwidth is around 14.4 kbaud – “poor modem”
    • Maybe WAN Cellphone bandwidth will be limited for near future
    • “Bluetooth” standard should give hand-held devices megabit per second communication bandwidth for LAN
  • Two positives for the wireless hand-held device
    • Cheaper than a PC (relevant for students)
    • More portable and more pervasively useable than a PC
  • Grid on the Go Meeting April 2001

http://aspen.csit.fsu.edu/project/cctutorialjan01

collaborative palm tops
Collaborative Palm Tops
  • Shared Display: Share pixels between clients
  • Shared Event: Share URL between clients – in general have different versions (WAP for Palm-top, HTML/HTTP for PC’s) of display controlled by same XML content

Collaboration Server

URL or (scaled)frame buffer

……………..

HTTP-HTML

WAP

Web Server

http://aspen.csit.fsu.edu/project/cctutorialjan01

hand held devices and wireless
Hand Held devices and Wireless
  • Ubiquitous access to resources from palm-top devices will new access modes from simple job submission through visualization of results
    • Control large screendisplays – Banksand Erlebacher
    • Control active walls ofFlat Panel screens (Sunray)
    • Support in Gateway forjob submittal
    • Collaborativeclient inresearch or training
    • Shared display or Sharedweb-page with differentmodes for each type of device

http://aspen.csit.fsu.edu/project/cctutorialjan01

two hand held prototypes
Two Hand Held Prototypes
  • Latest release of VNC (public domain shared display) for Palm tops is quite impressive – fast and includes server side resizing for reducing “shared display” for smaller hand held display
  • We have a prototype of a Java client in a Palm controlling 3D object on PowerWall through a wireless connection

PalmVNC

http://aspen.csit.fsu.edu/project/cctutorialjan01

real time collaborative systems
Real Time Collaborative Systems
  • Real time situations demand immediate response from anywhere expert
    • spacecraft reports unexpected problem
    • IMT test surprise
    • Commanders or field personnel in Crisis Management
    • Scientific analysis during aftershocks of Earthquake
  • Collaboration (must bring in special expert) and support of diverse displays – maybe critical person only has Palmtop – are particularly important in these application
    • Synchronous and asynchronous

http://aspen.csit.fsu.edu/project/cctutorialjan01

slide43

WAKE UP!

WAKE UP!

page

ALARM

Caltech

quake location, size --

page

disp

disloc

JPL

sorted station potential --

modem

Dial Stations(and database)

USGS

station raw files --

page

WAKE UP!

GIPSY/auto_p

JPL

station motions --

JPL

disloc

simplex

JPL

--maps for

civil authorities

single-fault model

multi-fault model

Virtual_California

Boulder

(University of Colorado)

web simplex

JPL

--graphics

--refined fault model

collaboration

--graphics

--hazard model

http://aspen.csit.fsu.edu/project/cctutorialjan01

slide44

SharedBrowserof

Simulation

Results

Will become

myACES

Chatroom

Shared map of faults/sensors

SCEC Demo (Sept 99)Collaboration in GEM

Earthquake Analysis System

Conferencing

http://aspen.csit.fsu.edu/project/cctutorialjan01

collaborative portal
Collaborative Portal

Data

base

Data

base

WebPage

Persistent Store of Earthquake Data

Simulations

Real Time control

And sensor data

ResourceML

Asynchronous Access

Store

Real time Share

CollaborativemyACES

Synchronous Distributed Science

PersonalServer

PortalML

“Client”

HTML WML/WAP Rendering Standards

http://aspen.csit.fsu.edu/project/cctutorialjan01

what is a web portal
What is a Web Portal?
  • It is a “just” a web-based application
  • Commodity Portal is Web-based Information Source (Yahoo) or Shop (Amazon)
  • Enterprise Information Portal is “Lotus Notes done right”
  • Education Portal is a Web-based University
  • Computing Portal is a “Problem Solving Environment”
  • Well defined Interfaces based on
    • Grid Forum -- Computing
    • IMS/ADL/IEEE LTSC -- Education
  • And a set of Services and Tools

http://aspen.csit.fsu.edu/project/cctutorialjan01

commodity portals are web interfaces for consumers
Commodity Portals are Web Interfaces for Consumers

Yahoo, NetCenter, Amazon.com, Ebay.com etc. are portals fore-commerce, news etc.

http://aspen.csit.fsu.edu/project/cctutorialjan01

portals in computing and education
Portals in Computing and Education
  • Merrill Lynch predicts that Enterprise Information portal market will be $15B by 2002
  • Unfortunately it is not trivial to re-use some key commodity systems as they do not provide the right level of interfaces to add capabilities like collaboration and security
  • We must adopt architecture that maximizes chance that can use new commercial capabilities when they become available
    • Multi-media, Handheld infrastructure are areas where industry ahead of academia

Hardest Problem

Wish to re-usecomponents

betweenEducation and

Computing

http://aspen.csit.fsu.edu/project/cctutorialjan01

hierarchy of portals and their technology
Hierarchy of Portals and Their Technology

……...

……...

Portal Building Tools and Frameworks (XUL, Ninja, iPlanet, E-Speak, Portlets, WebSphere, www.desktop.com)

Generic Portals

Collaboration

Universal Access

Security …….

Generic Services

User customization,

component libraries,fixed channels

Information Services

Databases …….

Enterprise Portals

Quizzes Grading ...

www.computingportals.org

Education Services

Compute Services

Grid Services

Visualization ...

MathML etc

Education andTraining Portals

Science Portals

K-12

University

Biology

GEM

http://aspen.csit.fsu.edu/project/cctutorialjan01

gem computational environment multi tier architecture
GEM Computational Environment Multi-Tier Architecture

Geophysical

“Web” Info

Seismic Sensors

Field Data

General

“Web” Info

Databases

(HPCC) Computers

(Java) Interactive Analysis

Client Visualization

Backend Services

Middleware

Bunch of

Web Servers

and Object

Brokers

Collaboration

SecurityLookup

Registration

Agents/Brokers

Application Integration

Visualization Server

Seamless Access

Clients

http://aspen.csit.fsu.edu/project/cctutorialjan01

pet computing portal driving requirements
PET Computing Portal: Driving Requirements
  • Goal is to maximize productivity of (Super)computer center user
  • Provide in a single web interface “myPET”, all resources needed for HPCMO and DoD Research and Computing
    • Display Sensor results
    • Initiate and visualize simulations
    • Necessary information -- from program documentation to latest technical reports
    • Contact colleagues in real-time (audio/video conferencing) or asynchronously (email etc.)
    • Support access from hand-held (Palm) devices
    • Allow customization of choice and arrangement of material

http://aspen.csit.fsu.edu/project/cctutorialjan01

services in computing portals
Services in Computing Portals
  • Security
  • Fault Tolerance
  • Object Lookup and Registration
  • Object Persistence and Database support (as in EIP’s)
  • Event and Transaction Services
  • Collaboration among scientists around world
  • Job Status as in HotPage (NPACI) and myGrid (NCSA)
  • File Services (as in NPACI Storage Resource Broker)
    • Support (XML based) computational science specific metadata like MathML, XSIL
  • Visualization
  • Programming
  • Application Integration (chaining services viewed as backend compute filters)
  • “Seamless Access” and integration of resources between different users/application domains
  • Parameter Specification Service (get data from Web form into Fortran program wrapped as backend object)

AnyPortal

http://aspen.csit.fsu.edu/project/cctutorialjan01

gateway portal
Gateway Portal

HPC

Resources,

Mass

Storage,

DBs

Apache

Tomcat

PSE

Browser

ORB

HTTP

WebFlow

Servers

Charon

SECIOP

ORB

ORB

ORB

SECIOP

krsh, krcp

  • Supports Kerberos Security for DoD
  • Supported by DoD HPCMO: ASC and ARL
  • Involves work by Furmanski (Syracuse) and Haupt (MSU)

PortalML

ResourceML

http://aspen.csit.fsu.edu/project/cctutorialjan01

select code to run
Select Code to Run

“Wrapped Codes”Use Caltech XSILfor XML specification

a sample collaboratory
A Sample Collaboratory
  • Here is a sample collaboratory designed for “HallD” – a proposed experiment at DoE’s Jefferson Laboratory
  • HallD produces 1015 data or simulation objects per year
  • HallD involves hundreds of scientists around the country collaborating in taking data, processing it and analyzing it to find nifty science breakthroughs
  • One first would establish HallD Digital Object Standard covering everything from LED on experimental apparatus, data produced in each part of apparatus, plots and other analysis artifacts, presentations and papers

http://aspen.csit.fsu.edu/project/cctutorialjan01

myhalld collaborative portal
MyHallD Collaborative Portal
  • MyHallD is the portal door to the
    • Virtual HallD Experiment Control Room
    • Virtual HallD Monte Carlo Farm
    • Virtual HallD DST Factory
    • Virtual HallD Physics Engine
    • Virtual HallD Board Room
    • HallD Education and Outreach Area
  • These share access to HallD digital objects but access (and make) them in different ways and are optimized in different ways
  • They share certain features and services
    • All actions are logged (in XML) and archived
    • Common security infrastructure
    • Access can be from PC or Hand Held device

http://aspen.csit.fsu.edu/project/cctutorialjan01

features of myhalld and it s halld virtual places
Features of MyHallD and it’s HallD Virtual Places
  • MyHallD would have:
    • “Handles” to open 6 Community Virtual Places as well as ability to open private virtual rooms
    • HallD/Jefferson/HEP Calendar, Phone lists etc.
    • News Items with browser links
    • Experiment Status etc.
    • Invoke basic Collaboration Tools – Internet Phone; Local and remote cameras; Chat; Whiteboard
    • Automatic Update (to myHallD) Feature
    • Indicator as to which places you are in and who else is active there.
    • To do list for you in HallD
    • Gentle and Crass ways of getting people’s attention

http://aspen.csit.fsu.edu/project/cctutorialjan01

features of virtual myhalld places
Features of Virtual MyHallD Places
  • HallD Board room can be done today for some capabilities using WebEx Placeware or Centra
  • DST Factory and Monte Carlo Farm do not require significant synchronous collaboration; build computing portals for standard Physics packages
    • Need strong management functions
  • HallD Physics Engine could benefit from innovative user interfaces and collaboration in analysis of results
    • Here is where difficult decisions made (how to run Minuit optimization program) and distributed experts could be useful
    • Share analysis results and choice of parameters for future large analysis (which partial waves to include)
  • HallD Education and Outreach can use Virtual Classroom model being developed by several vendors

http://aspen.csit.fsu.edu/project/cctutorialjan01

features of virtual myhalld places62
Features of Virtual MyHallD Places
  • Virtual Experiment Control Room could be a big win as (unexpected) real-time decisions need “experts-on-demand”
    • Similar model with DoD and IMT experiments or NASA for remote spacecraft mission control and real-time scientific analysis of earthquakes
    • Needs to evaluate collaborative decision making (vote?) and planning tools
    • Needs to allow shared streaming data as well as shared read-outs of experimental monitors (output of all devices must be distributed objects which can be shared)
    • Needs to support experts caught on their sailboat with poor connectivity or in their car with just a cell phone and a PDA

http://aspen.csit.fsu.edu/project/cctutorialjan01