Before Class

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Before Class

• Look over Opening Case on Radiology p 260
• How is voice recognition software used?
• How is the software evaluatedthat is, how is
  product evaluated
• What are other similar applications?

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Outline

• Week prior to break
• Social and Ethical Issues
• This week
• Today Hardware I
• Wednesday Lab, Project Evaluation
• Friday Hardware II

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Current Event/Web Site

• Onion.com

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Access Project

• Criteria Sheet at end of lesson
• Time provided today for team discussions of final
  plans

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8
Computer Hardware
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Table 8.1Using Voice Recognition in Radiology

• How is voice recognition software used?
• How is the software evaluatedthat is, how is
  product evaluated
• What are other similar applications?

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Hardware I

• Performance
• Variables and Measures
• Overview
• Architectures

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Table 8.2Performance Variables for IT

• FUNCTIONAL CAPABILITIES AND LIMITATIONS-- WHAT
  TYPES OF PROCESSING IS THE TECHNOLOGY SUPPOSED TO
  PERFORM AND WHAT CAPABILITIES DOES IT HAVE?
• Capacity
• How much information can it store or process?
• Speed
• How fast can it process data or instructions?
• Price-performance
• How many dollars does it cost per amount of
  information stored or for a given calculation
  speed?
• Reliability
• How long will it likely continue operating
  without errors or unplanned interruptions.
• Operating conditions
• How much space does it take up?
• How much does it weigh?
• What temperature does it require?
• How much electricity does it use?

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Table 8.2Performance Variables for IT

• EASE OF USE--HOW EASY IS IT TO USE THIS
  TECHNOLOGY?
• Quality of user interface
• How intuitive and easy to learn is the method for
  instructing the technology to perform its task?
• Ease of becoming proficient
• How much effort is required to become proficient
  in using the technology?
• Portability
• How easy is it for the user to move the
  technology in the course of doing work?

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Table 8.2Performance Variables for IT

• COMPATIBILITY--HOW EASY IS IT TO GET THIS
  TECHNOLOGY TO WORK WITH OTHER COMPLEMENTARY
  TECHNOLOGIES?
• Conformance to standards
• To what extent does the technology conform to
  accepted industry standards?
• Interoperability
• To what extent does the technology use the same
  internal coding and external interfaces as other
  technology it must operate with or substitute for?

• MAINTAINABILITY--HOW EASY IS IT TO KEEP THE
  TECHNOLOGY OPERATING OVER TIME?
• Modularity
• Is it divided into modules that can be snapped
  together when building systems?
• Can these modules be replaced by equivalent
  modules if necessary?
• Scalability
• Is it possible to significantly increase or
  decrease capacity without major disruptions?
• Flexibility
• Is it possible to change important aspects of
  system operation without major disruptions?

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Measures

• Data Amounts
• Time
• Rate of Transfer
• Internal Clock Speed
• Speed of Execution

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Data Amounts

• Rank from smallest to largest
• A. Megabyte
• B. Terabyte
• C. Gigabyte
• D. Kilobyte

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Time

• Rank from smallest amount of time to largest
• A. Microsecond
• B. Picosecond
• C. Nanosecond
• D. Millisecond

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Clock Speeds and Transmission

• Rank from the lowest freq to highest freq
• A. Kilohertz
• B. Hertz
• C. Megahertz
• D. Gigahertz

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Overview of Computer Systems

• Basic Model
• Types of Computers
• Architectures

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Figure 8.3Four approaches to computing in
organizations
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Figure 8.3Four approaches to computing in
organizations
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Table 8.3Cost of Ownership for Personal
Computers, Network Computers, and Net PCs

• DESKTOP
• Equipment outlay
• Technical support and administration
• End-user operations
• Desktop annual cost

185020113464 7325
980 13101799 4089
173313922073 5198

• NETWORK
• Network equipment outlay
• Network tech support and administration
• Network end user
• Network annual cost
• Total costs

682 1190 588 2460 9785
689 841 392 1922 6011
664 973 434 2071 7267
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Figure 8.4Client-server versus centralized
mainframe computing
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Summary

• Performance
• Variables and Measures
• Overview
• Architectures
• Now, assess project status, coordinate completion

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