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(i) Definition of "mobile computing”
Mobile Computing is a variety of wireless devices that has the mobility to allow people to
connect to the internet, providing wireless transmission to access data and information from
where ever location they may be.
Mobile computing has three aspects: mobile communication, mobile hardware, and mobile
software. The first aspect addresses communication issues in ad-hoc and infrastructure networks
as well as communication properties, protocols, data formats and concrete technologies. The
second aspect is on the hardware, e.g., mobile devices or device components. The third aspect
deals with the characteristics and requirements of mobile applications.
(ii) Limitations of mobile computing devices
Insufficient bandwidth
Mobile Internet access is generally slower than direct cable connections, using technologies such
as GPRS and EDGE, and more recently PISDPA and HSUPA 3G networks. These networks are
usually available within range of commercial cell phone towers. Higher speed wireless LANs are
inexpensive but have very limited range.
Security standards
When working mobile, one is dependent on public networks, requiring careful use of VPN.
Security is a major concern while concerning the mobile computing standards on the fleet. One
can easily attack the VPN through a huge number of networks interconnected through the line.
Power consumption
When a power outlet or portable generator is not available, mobile computers must rely entirely
on battery power. Combined with the compact size of many mobile devices, this often means
unusually expensive batteries must be used to obtain the necessary battery life.
Transmission interferences
Weather, terrain, and the range from the nearest signal point can all interfere with signal
reception. Reception in tunnels, some buildings, and rural areas is often poor.
Potential health hazards
People who use mobile devices while driving are often distracted from driving are thus assumed
more likely to be involved in traffic accidents. (While this may seem obvious, there is
considerable discussion about whether banning mobile device use while driving reduces accidents or not. Cell phones may interfere with sensitive medical devices. There are allegations
that cell phone signals may cause health problems.
Human interface with device
Screens and keyboards tend to be small, which may make them hard to use. Alternate input
methods such as speech or handwriting recognition require training.
Kavungya answered the question on May 14, 2019 at 08:37
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(i) Serial mode.
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Analyse the following modes of communication with reference to-cost, speed of transmission
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(i) Serial mode.
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Date posted: May 14, 2019. Answers (1)
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Required:
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Describe the characteristics of the following information systems:
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ii) Sales and marketing...(Solved)
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Describe the characteristics of the following information systems:
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Date posted: May 14, 2019. Answers (1)
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ii) State five types of information systems
b) As the information system manager of a company whose operations are highly...(Solved)
a) i) Define the term "information systems
ii) State five types of information systems
b) As the information system manager of a company whose operations are highly automated,
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Identify four measures that you could adopt in order to minimize occupational over-use
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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b) Briefly describe four structural elements of a...(Solved)
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Date posted: May 14, 2019. Answers (1)
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i. Operator error.
ii. Hardware...(Solved)
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ii. Hardware malfunction,
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Date posted: May 14, 2019. Answers (1)
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(iii) Outline three major problems a company...(Solved)
(i) Define the term "knowledge management system".
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)
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Date posted: May 14, 2019. Answers (1)