Inf 245 mobile applications mobile devices
This presentation is the property of its rightful owner.
Sponsored Links
1 / 27

INF 245 Mobile applications Mobile Devices PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on
  • Presentation posted in: General

INF 245 Mobile applications Mobile Devices. Ola Bø Fall 2007. Introduction. Knowledge about mobile devices is relevant when choosing a device for an application.

Download Presentation

INF 245 Mobile applications Mobile Devices

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Inf 245 mobile applications mobile devices

INF 245 Mobile applicationsMobile Devices

Ola Bø Fall 2007

Molde University College INF 245 Fall 2007 OBø


Introduction

Introduction

  • Knowledge about mobile devices is relevant when choosing a device for an application

  • In some cases the device is not for us to choose. But we still need to have target devices to develop for. How do we choose the target?

Molde University College INF 245 Fall 2007 OBø


Input mechanisms i

Input-mechanisms I

  • Keypad

    • The standard for mobile phones is a 12-digit keypad

      • We can enter all letters using multipress

      • or we can use T9 (ca twice as quick as multitap). T9 is also called dictionary supported predictive input

T9

Molde University College INF 245 Fall 2007 OBø


Input mekanisms ii

Input-mekanisms II

  • Pen based input

    • Soft Keyboard (simple, but slow)

    • Letter Recognition–PocketPC (faster but more typing errors)

    • Hand-writing recognition

Molde University College INF 245 Fall 2007 OBø


Input mechanisms iii

Input-mechanisms III

  • Keyboard

    • Standard for portable PC

    • Accessory for smart phones and mobile phones

      • may be wireless

    • Some smart phones have usable inbuilt keyboards

      • Thumb-keyboards

  • Voice

    • Voice recognition

    • More advanced voice recognition may need a server – Voice gateway.

      • Voice XML

    • Problems

      • Socially acceptable?

      • Noisy environments?

Molde University College INF 245 Fall 2007 OBø


A solution for a full qwerty keyboard directly on the mobile phone

A solution for a full QWERTY-keyboard directly on the mobile phone

  • Virtual keyboard

  • Developed by vkb

  • http://www.virtual-laser-keyboard.com/

  • Figure shows the a prototype build into a Siemens SX1

  • Tests report

    • works well for low to medium typing speed.

    • takes time to adjust settings

    • works only in subdued light

  • Can be bought as accessory to PC, PDA or smart phone

Molde University College INF 245 Fall 2007 OBø


Input mechanisms iv digital camera

Input mechanisms IVDigital Camera

  • Augmenting proportion of phones have a camera

  • Augmenting number of pixels and camera featurs (auto focus, zoom, blitz)

  • Applications

    • Used as a camera to make pictures

      • Transfer to desktop, printer or lab

      • Transfer to other persons or firms

      • Blogging

    • Used as a scanner to read bar codes

      • Places or things

Wikipedia the free encyclopedia

Molde University College INF 245 Fall 2007 OBø


Input mechanisms v

Input mechanisms V

  • GPS (Global Positioning System)

    • Is beginning to be embedded in high end devices 2006/2007

  • Barcode scanner and/or RFID (Radio Frequency Identification) reader

    • Has been available on specialized devices for a number of years

Molde University College INF 245 Fall 2007 OBø


Output mechanisms

Output mechanisms

  • Screen

    • varies widely

    • from 96x68 black/white Nokia 1110i

    • to 240x320 262144 colors Nokia N73

    • or 800x352+240x320 Nokia E90

  • Sound

    • Improved sound generations

    • Voice synthesis

  • Projector?

Molde University College INF 245 Fall 2007 OBø


Wireless communications

Wireless communications

  • Three solutions:

    • Two cooperating devices e.g. a mobile computer and a mobile phone.

      • Can be connected using a cable, IR (infrared) or BlueTooth

    • Accessory (e.g. wlan-card)

    • Integrated solution (radio integrated in the device)

    • Several radios integrated in the device

We are movingin this direction.

Why?

Molde University College INF 245 Fall 2007 OBø


Classification of mobile devices

Is this illustration too simple?

Classification of mobile devices

From Mallick (2003)

Molde University College INF 245 Fall 2007 OBø


Web phones

Web-phones

  • Mobile phones

    • Voice

    • SMS

  • Wireless internet applications

  • But display and keyboard are limited

    • only suitable for applications with limited sets of data

  • Contains a wireless modem

  • Long battery service time

Nokia 1110i

Molde University College INF 245 Fall 2007 OBø


Low end smart phones

Low end smart phones

  • Similar to web-phones in size and screen

  • Smart phones can run local applications

    • Applications can be downloaded via radio

      • This is called OTA (Over The Air)-provisioning

    • Common applications: Games

    • J2ME is the standard programming platform for this kind of devices. (300 000 000 devices sold until autumn 2004)

  • Primary use: SMS and Telephony

  • Simple to use

Molde University College INF 245 Fall 2007 OBø


Top model smart phone

Top-model smart phone

  • Between the mobile phone and the PDA in size

  • Many models can be ”opened” to access larger screen and keyboard

  • Good integration with business software

  • Approaches PDA

Molde University College INF 245 Fall 2007 OBø


Top end smart phones

Top-end smart phones

Molde University College INF 245 Fall 2007 OBø


Handheld pcs

Handheld PCs

  • Designed as Laptops, but smaller

  • From 1980 Psion

  • Windows CE -> Handheld PC

  • Often ½ VGA i.e. 480x320

  • Instant on/off

  • weight ca 0,5 kg

  • Squeezed between PDA and mini-portable

Molde University College INF 245 Fall 2007 OBø


Tablet pc

Tablet PC

  • Smaller than laptop

    • weight can be a problem

  • Touch-screen and pen-input

    • Not as precise as a mouse.

      • Consequences?

  • Same storage and computing power as a laptop

  • Advantage over laptop

    • Can easily be used with one hand without a desk.

  • Advantage over mobile phone

    • Screen size and computing power

Molde University College INF 245 Fall 2007 OBø


Notebook laptop

Notebook/laptop

  • Advantages:

    • Same operating system and functionality as a desktop

      • But the computer power is often reduced – why?

    • Can use the same applications

    • Connectivity: an augmenting number of radios are integrated

      • WLAN, BlueTooth: Standard in new devices

      • EDGE, UMTS: Can be added using a card

  • Drawbacks:

    • Weight, Fragility, Battery capacity, Size

Molde University College INF 245 Fall 2007 OBø


Trends convergence and improvement

Trends – convergence and improvement

  • More and more technologies are melting together

    • Mobile phone + PDA + GPS + digital camera + mp3 and video-player

    • EDGE + UMTS + BlueTooth + WLAN + GPS

      • in the same device

      • roaming between networks

  • Cheap devices steadily gets more functionality

  • All devices gets faster processor and more memory

  • All devices gets a colour screen with augmenting number of pixels and colour depth

Molde University College INF 245 Fall 2007 OBø


Convergence ii

Convergence II

  • The makers of mobile devices

Consumer Electronics

Sony, Samsung,

Microsoft, Apple, Intel, HP,

Nokia, Ericsson

PC Industry

Wireless equipment

Molde University College INF 245 Fall 2007 OBø


Accessories

Accessories

  • Mobile printers

    • Weight ~ 2 kg

Canon PIXMA iP90v

Molde University College INF 245 Fall 2007 OBø


Conclusion

Conclusion

  • There is a substansial heterogeneity in mobile devices, but we also see some convergence

    • Consequence: If you develop an application that must be available for many different diveces it is often more expensive to adapt the application to all the units than it costs to develop it for the first device (Schlickum 2005)

      • Testing demands a great number of units and is expensive.

Molde University College INF 245 Fall 2007 OBø


Exercise

Exercise

Petrine’s Pizza wishes to make it possible to order Pizza from mobile equipment. The custormers should get an answer confirming that the order is received.

What kind of mobile devices should this application be made for?

Molde University College INF 245 Fall 2007 OBø


Exercise1

Exercise

The maintenance workers of a manufacturing company are servicing machines in production facilities in a number of sites within a large area.For each service job there is an there is an operating procedure and possibly drawings of the equipment to be serviced. The part inventory database and the log for service jobs should also be available and updatable. The service jobs are done regularly on a weekly to yearly schedule. The maintenance is done partly in places that are difficult to access demanding climbing ladders or passing through narrow openings. It is an advantage if the mobile equipment is available when the work is being carried out. The workers also need to communicate with each others and with the maintenance managers. Some of the work places ar without GSM or WLAN coverage.

Suggest mobile devices suitable for supporting the maintenance work and explain why the selected devices are suitable.

Molde University College INF 245 Fall 2007 OBø


Exercise2

Exercise

You are working with an application to support ornithologists. The main goal of the application is to enable registration of birds in an area. The date being registered are species, number of adults, number of eggs/offspring, date, time and comment. The registered information shall be transferred to a central data base. In rare cases, the ornithologist is in doubt as to which species he is observing. Therefore images and sounds for all species should be available on the mobile device. Some of the areas being observed are outside the coverage area of mobile networks.

Choose a suitable mobile device and explain why this device is appropriate.

Molde University College INF 245 Fall 2007 OBø


Oppgave

Oppgave

After testing opinion using a questionnaire there is a substantial amount of supplementary work punching the questionnaires into the database of results.

The cost and number of errors committed can be reduced by registering the answer directly into the database while the respondent is answering.

Suggest mobile devices that are practical for the employees of the opinion testing agency when the testing is being done by walking from door to door in an area or by stopping people in the street.

What is the difference between this work situation and that of the mobile maintenance workers?

Can the kind of questions asked in the questionnaire have any influence on what may be regarded as suitable equipment.

Molde University College INF 245 Fall 2007 OBø


References

References

Mallick, Martin (2003) Mobile and Wireless Design Essentials

Molde University College INF 245 Fall 2007 OBø


  • Login