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Human–computer interface design issues for a multi-cultural and multi-lingual English speaking country — Botswana

Onibere, E.A.; Morgan, S.; Busang, E.M.; Mpoeleng, D. (Elsevier Science Ltd, www.elsevier.com/locate/intcom, NaN, 2001)

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Abstract:

This paper reports on research carried out to determine whether a localised interface is preferred by users in a multi-cultural and multi-lingual country where a non-local language is nationally used,. We attempted to discover whether local symbols are more acceptable to users as icons and also whether the current phrases used in menus and icon descriptions are clearly understood by the various communities. A survey was conducted nation-wide among computer end-users in Botswana. The results indicate an overwhelming desire from users for a localised interface. However, there appears to be little need for localised icons and no agreement as to which language to use for text-based interfaces.

URI:

http://hdl.handle.net/10311/887

Files in this item: 1

Mpoeleng_IC_2001.pdf (1.247Mb)

Improving the quality of service guarantee in an Asynchronous Transfer Mode (ATM) Network

Ogwu, F.J.; Talib, M.; Aderounmu, G.A. (Science Publications, http://www.scipub.org/scipub/c4p.php?j_id=JCS, NaN, 2007)

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Abstract:

This study presents a technique for improving the quality of service (QoS) guarantee in an ATM network. In the proposed model, it was assumed that high priority traffic have been allocated a switch resource to guarantee a given QoS and low priority cells are allowed to enter the buffer, to improve the exploitation of reserved resources. The proposed technique was backed up with an exact analytical model for evaluating the cell loss probability of high and low priority cells. The performance of the proposed model was evaluated using C++ programming language. The results of the simulation shows that the loss probability of both high and low cells reduces as the buffer capacity increase and that the performance of high priority cell is better than that of low priority cell.

URI:

http://hdl.handle.net/10311/818

Files in this item: 1

Ogwu_JCS11_2007.pdf (556.8Kb)

Stochastic estimator-based wireless traffic control schemes

Ogwu, F.J.; Talib, M.; Aderounmu, G.A. (Science Publications, http://www.scipub.org/scipub/c4p.php?j_id=JCS, NaN, 2007)

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Abstract:

Recent works on Available Bit Rate (ABR) traffic control have generated efficient control schemes for ABR traffic on Asynchronous Transfer Mode (ATM) network. This study examines the improved performance envisaged if these control schemes adjust dynamically to the varying ABR bandwidth capacity in a stochastic manner instead of conventional deterministic approach. The performance difference between setting explicit rate deterministically for transmitting ABR sources and doing the same stochastically using a learning automaton is of particular interest. The learning automaton used is the Stochastic Estimator Learning Automaton (SELA). The performance difference is measured by comparing the congestion levels of the SELA-based control scheme with the reference deterministic control mechanism. Simulation results show that the stochastic estimator gives a better performance. The higher average congestion level experienced by the conventional deterministic approach is mainly due to the propagation time delay in the closed-loop feedback control schemes.

URI:

http://hdl.handle.net/10311/817

Files in this item: 1

Ogwu_JCS_2007.pdf (502.1Kb)

Using merkle tree to mitigate cooperative black-hole attack in Wireless Mesh Networks

Om, S.; Talib, M. (The Science and Information Organization Inc., www.ijacsa.thesai.org, NaN, 2011)

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Abstract:

Security is always a major concern and a topic of hot discussion to users of Wireless Mesh Networks (WMNs). The open architecture of WMNs makes it very easy for malicious attackers to exploit the loopholes in the routing protocol. Cooperative Black-hole attack is a type of denial-of-service attack that sabotages the routing functions of the network layer in WMNs. In this paper we have focused on improving the security of one of the popular routing protocols among WMNs, Ad-hoc on demand distance vector (AODV) routing protocol and present a probable solution to this attack using Merkle hash tree.

URI:

http://hdl.handle.net/10311/1067

Files in this item: 1

Om_IJACSA_2011.pdf (294.4Kb)

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