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3 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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Information Technology Foundations
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BIT 112

CHAPTER 5

Network Applications

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Chapter Outline



5.1 Network Applications



5.2 Web 2.0



5.3 E
-
Learning and Distance Learning



5.4 Telecommuting

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Learning Objectives


Describe the four major network applications.


Discuss the various techniques, applications, and web
sites that fall under the umbrella of Web 2.0.


Differentiate between e
-
learning and distance
learning.


Understand the advantages and disadvantages of
telecommuting for both employers and employees.

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Chapter Opening Case P. 136

Hannaford Bros. HQ


Checking out


Advertising meats

communications??

communications??

comm??

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5.1 Network Applications


4 Categories


Network applications can be used for up to four
purposes.


Discovery


Communications


Collaboration, and


Web 2.0 and/or Web Services

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Network Application Categories


1. Discovery


Discovery allows users to browse and search data
sources, in all topic areas, on the Web.


Search engines


Computer programs that search for specific information
by key words and report the results.


Metasearch

engines


Search several engines at once and integrate the findings
of the various search engines to answer queries posted
by users.


Portals


Web
-
based, personalized gateway to information.


Discovery of material in foreign languages can also be
accomplished on the Web because many engines perform
automatic translation.

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Four Largest Search Engines


Google



Yahoo



Microsoft Network



Ask

Handle
Over 90
Percent
Of All
Searches.

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Other Interesting Search Engines


FilesTube


Search and download files from file sharing and upload
sites




GoSasa


Metasearch engine that finds free online classified ads of all
kinds.


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Interesting Search Engines (continued)


WeShow


Human
-
powered search engine for finding online video




SearchCrystal


Allows you to visualize search results




Gnosh


Metasearch tool that lets you search large media sites as
well as social search engines




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Metasearch Engines


Surf
-
Wax




Metacrawler




Mamma




KartOO





Dogpile


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Publication of Material in Foreign
Languages



Translation products include:



Altavista




Google




Trados

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Altavista Translator

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Google Language Tools

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Discovery
-

Portals


Web
-
based, personalized gateway that provides
relevant information from different IT systems and the
Internet using search and indexing techniques.


Commercial (public) portals


content for diverse communities and are most popular
portals on the Internet.


Affinity portals


support communities such as a hobby group or a political
party.


Mobile portals


Corporate portals


Industrywide

portals

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Commercial Portal (example)

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Affinity Portal (example)

Auburn University Alumni Affinity Portal

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A Corporate Portal Framework


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Corporate Portal (example)


Fictional Company’s
Portal.


Note the toolbar on the
left, which contains:
administration, my
ebusiness, my
groupware, my
productivity, my
financials, and my
utilities.



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Corporate Portal (example)

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Industrywide Portal (example)

TruckNet Portal

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Network Application Categories


2. Communication


Electronic mail (e
-
mail)


Largest
-
volume application running on the Internet.


Web
-
based call centers (customer call center)


Provide effective personalize customer contact services as
an important part of Web
-
based customer support.


Electronic chat room


A virtual meeting place where groups of regulars come to
“gab”.


Voice Communication


digitizing your analog voice signals.

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Call Centers


Call Center in the United States


Call Center in India

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Electronic Chat Room

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Voice Communication


Two examples of Internet telephony. Voice
-
over IP
(VoIP) digitizes your analog voice signals, sections
them into packets, and sends them over the Internet.




Skype





Vonage

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Network Application Categories


3. Collaboration


Collaboration refers to efforts of two or more entities
(individuals, teams, groups or organizations) who
work together to accomplish certain tasks.


Work group


Refers specifically to two or more individuals who act
together to perform some task.


Virtual group (team)


Group members are in different locations.


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Types of Collaboration


Virtual collaboration


The use of digital technologies that enable organizations or individuals to collaboratively plan,
design, develop, manage and research products, services and innovative applications.


Workflow technologies


Facilitate the movement of information as it flows through the sequence of steps that make up an
organization’s work procedures. Includes workflow management and workflow systems.


Groupware


Software products that support groups of people who share a common task or goal and who
collaborate to accomplish it.


Teleconferencing


Use of electronic communication that allows two or more people at different locations to hold a
simultaneous conference.


Videoconference


Participants in one location can see participants at other locations and share data, voice, pictures,
graphics and animation by electronic means.


Web conferencing


Videoconferencing conducted over the Internet.


Real
-
time collaboration tools


Support synchronous communication of graphical and text information i.e. computer
-
based
whiteboards.

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Workflow and Groupware Technologies

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Telepresence

Systems
-

The Latest
Version of Videoconferencing


Enable participants to seamlessly share data, voice,
images, graphics, video, and animation electronically.


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Leading Telepresence Systems


Cisco Telepresence 3000

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Leading Telepresence Systems
(continued)



Hewlett
-
Packard Halo System

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Leading Telepresence Systems
(continued)



Polycom HDX 9000

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Whiteboard


A Real
-
time Collaboration
Tool


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Network Application Categories


4. Web Services (5.2 Web 2.0)


Web 2.0 is a term describing changing trends in the
use of Web technology and web design.


The aim is to enhance creativity, information sharing,
and collaboration among users.


These concepts have led to the development and
evolution of web
-
based communities and hosted
services, such as social
-
networking sites, video
sharing sites, wikis, blogs, and
folksonomies
.


Thus, Web 2.0 is a loose collection of the latest
information technologies and applications, and the
Web sites that use them.

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Web 2.0 Information Technologies and
Applications


AJAX


A web development technique that allows

portions of web pages to reload with fresh

data instead of requiring the entire web page to reload.


Tagging


A tag is a keyword or term that describes a piece of
information (e.g., blog, picture, article, video clip).



Blogs and blogging


A blog is a personal web site,

open to the public, in which the

site creator expresses his or her

feelings or opinions.


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Web 2.0 Information Technologies and
Applications (continued)


Wikis


Web site on which anyone can

post material and make changes

to other material.



Really Simple Syndication (
RSS
)


RSS

allows users to receive, or customize
the information they receive when they
want it without having to surf thousands of
web sites.



Podcasts and
Videocasts


A podcast is a digital audio file that is
distributed over the web using
RSS

for
playback on portable media players or
PCs. A
videocast

is the same as a podcast,
only with digital media and audio content.


Wikis used in business

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Categories of Web 2.0 Sites


Social Networking Sites


Allow users to upload their content to the web in the form
of text, voice, images, and video.


Aggregators


Provide collection of content from the web (e.g.,
Technorati, Digg, Simple thred).


Mashups


A web site that takes content from a number of other web
sites and mixes them together to create a new kind of
content (e.g., SkiBonk, Healthmap, ChicagoCrime)


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Social Networking Sites


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More Social Networking Sites


BusinessWeek

slideshow


Radar Networks has developed Twine, which claims
to be the first Web 3.0 social networking site.


Each user’s Twine home page is a personal dashboard. Its
central feature is a list of updates not unlike the
Facebook

News Feed

that allows a user to import any memo,
website, video, or photo from anywhere on the desktop or
Internet.


Twine then uses semantic web

technology to automatically

organize all of the user’s

information by theme and then

infer what other information

might also interest that user.


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Aggregators


Provide collection of content from the web.

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Mashup (Skibonk)


A web site that takes content from a number of other web
sites and mixes them together to create a new kind of
content.













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Mashup (HealthMap)


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Mashup (ChicagoCrime)

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More Mashups


BusinessWeek
slideshow

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Web Services and Service
-
Oriented
Architecture


Web Services


Applications delivered over the Internet that users can select
and combine through almost any device, from personal
computer to cell phones.


Using a set of shared protocols and standards, web service
applications permit different systems to share data and
service without requiring humans to translate.


Service
-
Oriented Architecture


An IT architecture that makes it possible to construct
business applications using web services.


The architecture enables the web services to be reused
(often in multiple applications) across the organization.


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Four Protocols of Web Services


Extensible Markup Language (XML)


Simple Object Access Protocol (SOAP)


Web Services Description Language (WSDL)


Universal Description, Discovery, and Integration
(UDDI)

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Web Services Architecture


Web services architecture has three major components:
(1) Web services provider, (2) Web services directory, (3)
Web services client (or consumer).












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Widgets


Time widget

Weather widget

Date widget

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5.3 E
-
Learning and Distance Learning


E
-
Learning


Learning supported by the
Web.






Distance learning (DL)



Any learning situation in
which teachers and
students do not meet face
-
to
-
face.




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Benefits of E
-
Learning


Self
-
paced learning increases content retention.


Online materials deliver high
-
quality, current content.


Students have the flexibility of learning from any
place at any time at their own pace.


Learning time generally is shorter, and more people
can be trained due to faster training time.


Training costs can be reduced.

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Drawbacks of E
-
Learning


Instructors may need training to be able to teach
electronically.


The purchase of additional multimedia equipment
may be necessary.


Students must be computer literate and may miss the
face
-
to
-
face interaction with instructors.


There are issues with assessing students’ work, as
instructors really do not know who completed
assignments.

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Virtual Universities (example)


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5.4 Telecommuting


Telecommuting allows workers to work anytime and
anyplace.

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Telecommuting Benefits


For Employees


Reduced stress, improved family life


Employment opportunities for single parents and persons
with disabilities


For Employers


Increased productivity


Ability to retain skilled employees

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Telecommuting Disadvantages


For Employees


Feelings of isolation


No workplace visibility


Potential for slower promotions


For Employers


Difficulties in supervising work


Potential information security problems


Additional training costs

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Do you want to telecommute?

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Chapter Closing Case P. 162

First Vermont Bank, a part
of the TD Banknorth family