Human-Computer Interaction: Communication, Cooperation, and Application Design

By Hans-Jörg Bullinger; Jürgen Ziegler | Go to book overview

be a function of time, the spatial position of the sensor, and its relationship to the environment.

By following where sensor nodes are positioned, spatial data will less likely be in error.

In comparison to traditional computer networks, it is also important that networks composed of such sensors be more fault tolerant and adaptive to environmental changes.

There are some commercial sensor-network nodes we can use. One of them is NeuronChip, the network node of LonWorks. It communicates using LonTalk Protocol, a protocol stack ensuring that nodes can interoperate using an efficient and reliable communication standard ( Hoske 1996). Applications can be developed for NeuronChip in a GUI-based programming environment using Neuron-C which provides implicit message passing through network variables.


3 Background

It is essential for sensor systems to be fault tolerant and have real-time capabilities. Takegaki proposed a task mapping algorithm based on a diffusion model for distributed real-time systems ( Takegaki 1991). His approach included the analysis of task scheduling on the basis of a Rate Monotonic algorithm. Nadig proposed a network architecture composed of a hierarchical de Bruijn network to prevent node isolation due to route failures ( Nadig 1993). The above works were generally intended for plants or large scale factories, but not for more human-centric environments such as offices or homes.

Exemplary works having such a goal include Ubiquitous Computing ( Weiser 1991) and TRON ( Koshizuka 1996). In their networks, components are mostly electrical equipment, while we aim at connecting not only electrical equipment but also non-electrical objects by embedding networked sensors in them. In addition, since they did not concern dynamic changes of a sensor network, any mechanism for position dependency was never implemented.

Some work considered the location of a network node. Active Badge Location System ( Want 1992) aimed at constructing an active office with providing various services using computers on which some sensors are attached. Every user of the system wears an active badge that broadcasts a message by infra-red waves in a certain period. The system handles update of users' location information, but it cannot estimate the location of sensors dynamically because the location of each sensor is assumed to be fixed. In addition, the system cannot obtain a precise location, while our sensor network system can obtain the almost precise locations of several sensors in a short period.

-242-

Notes for this page

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
One moment ...
Default project is now your active project.
Project items

Items saved from this book

This book has been saved
Highlights (0)
Some of your highlights are legacy items.

Highlights saved before July 30, 2012 will not be displayed on their respective source pages.

You can easily re-create the highlights by opening the book page or article, selecting the text, and clicking “Highlight.”

Citations (0)
Some of your citations are legacy items.

Any citation created before July 30, 2012 will labeled as a “Cited page.” New citations will be saved as cited passages, pages or articles.

We also added the ability to view new citations from your projects or the book or article where you created them.

Notes (0)
Bookmarks (0)

You have no saved items from this book

Project items include:
  • Saved book/article
  • Highlights
  • Quotes/citations
  • Notes
  • Bookmarks
Notes
Cite this page

Cited page

Style
Citations are available only to our active members.
Buy instant access to cite pages or passages in MLA, APA and Chicago citation styles.

(Einhorn, 1992, p. 25)

(Einhorn 25)

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Cited page

Bookmark this page
Human-Computer Interaction: Communication, Cooperation, and Application Design
Table of contents

Table of contents

Settings

Settings

Typeface
Text size Smaller Larger Reset View mode
Search within

Search within this book

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

Help
Full screen
/ 1364

matching results for page

    Questia reader help

    How to highlight and cite specific passages

    1. Click or tap the first word you want to select.
    2. Click or tap the last word you want to select, and you’ll see everything in between get selected.
    3. You’ll then get a menu of options like creating a highlight or a citation from that passage of text.

    OK, got it!

    Cited passage

    Style
    Citations are available only to our active members.
    Buy instant access to cite pages or passages in MLA, APA and Chicago citation styles.

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn, 1992, p. 25).

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences."1

    1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

    Cited passage

    Thanks for trying Questia!

    Please continue trying out our research tools, but please note, full functionality is available only to our active members.

    Your work will be lost once you leave this Web page.

    Buy instant access to save your work.

    Already a member? Log in now.

    Author Advanced search

    Oops!

    An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.