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Web Colour - Human Resource - Lecture Slides, Slides of Human Resource Management

Shoolini University of Biotechnology and Management SciencesHuman Resource Management

In these Lecture Slides of HRM, the lecturer has illustrated the following major aspects of Human Resource Management : Web Colour, Monitors, Millions, Per Pixel, Bits, Older Computers, Greyscale, Colour Palettes, Fast Download, Compact Formats

Typology: Slides

2012/2013

Uploaded on 07/26/2013

dilhara
dilhara 🇮🇳

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web colour
•how many colours?
–PC monitors – millions – 24 bits per pixel
… but the ‘same’ colour may look very different
•N.B. usually only 72–96 dpi
–older computers, PDAs, phones …
•perhaps only 16 bits or 8 bits per pixel … 256 colours
•or even greyscale
•colour palettes
–choose useful 256 colours
–different choices, but Netscape ‘web safe’ 216 are common
–each GIF image has its own palette – use for fast download
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web colour

  • how many colours?
    • PC monitors – millions – 24 bits per pixel … but the ‘same’ colour may look very different - N.B. usually only 72–96 dpi
    • older computers, PDAs, phones …
      • perhaps only 16 bits or 8 bits per pixel … 256 colours
      • or even greyscale
  • colour palettes
    • choose useful 256 colours
    • different choices, but Netscape ‘web safe’ 216 are common
    • each GIF image has its own palette – use for fast download

movies and sound

  • problems
    • size and download… like graphics but worse!
    • may need special plug-ins
    • audio not so bad, some compact formats (MIDI)
  • streaming video
    • play while downloading
    • can be used for ‘broadcast’ radio or TV

(i) page loads

user’s machine

web server

movie plays

syuh how gtwhsio i ert ag tyghn ty we ghty chdi qw oatyfwet dfla ght a^ syuh how gtwhsio i ert ag tyghn ty we ghtychdi qw oatyfwet dfla ght a^ syuh how gtwhsio i ert ag tyghn ty we ghtychdi qw oatyf wet dfla ght a (ii) user watches

the active web

  • early days of the web
    • static pages … mostly text
    • some gateways (ftp, gopher)
    • usability … easy - one simple model (except frames break the model!)
  • dynamic content
    • what is the model/metaphor ???
      • passive pages or active interface
      • each leads to different user understanding
    • no easy answers!

what happens where?

  • architectural design is about what happens where
  • this affects:
    • feedback
      • seeing results of one’s own actions
    • feedthrough
      • seeing effects of other people’s actions
    • also affects complexity of implementation and hence maintenance

technology

where does it happen

client

  • applets , Flash, JavaScript & DHTML

server

  • CGI scripts, Java servlets , JSP, ASP, PHP, etc,

another machine

  • author’s machine, database server, proxy

people

  • socio-techncal solutions

security

• for computation

  • code and data at same place!

• problem

  • data - needs to be secure
  • web-server - least secure machine
  • client machine even worse

… and networks!

examples

• … TO DO … …

coin race uses JavaScript

dancing histograms are a Java applet