The growing rate of ICT utilization particularly the Internet and mobile
phones has influenced at an exponential rate online interaction and
communication among the generality of the populace. However, with the
enormity of businesses on the Internet, Tanzania is yet to harness the
opportunities for optimal financial gains. This study is exploratory in
nature as it attempts to unveil the prospects of ecommerce implementation,
participation, motivation and opportunity to the developing countries like
Tanzania where by the domestic market is very big to ensure the growth of
agricultural sector. The paper proposes to investigate the ability of
consumers to purchase online, the available motivation to do so, and the
opportunities for Internet access. We argue the Government and central bank
to encourage innovative new technological developments by pre-regulating
electronic money to familiarize itself with electronic money schemes
generally. Findings revealed that Tanzanians have the ability to participate
in e-commerce, but there is need for improved national image to bring in the
element of trust and discipline within, and before the international
communities. Currently, consumers source for information online but make
purchases the traditional way.
Wireless sensor networks (WSN) have been involved in different applications including monitoring many environmental phenomena such as air quality assessment, forest fire monitoring, flood rivers control.. In this paper, a WSN architecture where nodes are equipped with gas , temperature and dust sensors and Arduino-uno as microcontroller have been designed for air quality monitoring for some sensible area in Annaba City East of Algeria. The previous design included several units mainly: MSP430 Microcontroller, Gas and dust sensors, and the current regulator circuit. The new design is based on Arduino-Uno as micro-system. Comparing of normal gas levels for the clean air, the obtained results indicate that there is a big difference in the gas levels of both gases (LPG , NO2 and CO) which obtained from the several tests. However, the acquired results for the air quality control in some areas in Annaba city show no risky situation to be considered for further actions. In this work we cover the field of Air quality monitoring electronic Nodes design and wireless transmission of fusion data. Then A GUI has been designed for simulation of the WSN in controlling the environment air Quality. Tests are encouraging; the flexibility off the shelf components and the ease of design facilitates the implementation of this system.
The use of UML Activity Diagrams for modeling global dynamic behaviors of systems is very widespread. UML diagrams support developers by means of visual conceptual illustrations. However, the lack of firm semantics for the UML modeling notations makes the detection of behavioral inconsistencies difficult in the initial phases of development. The use of formal methods makes such error detection possible but the learning cost is high. Integrating UML with formal notation is a promising approach that makes UML more precise and allows rigorous analysis. In this paper, we present an approach that integrates UML Activity Diagrams with Rewriting Logic language Maude in order to benefit from the strengths of both approaches. The result is an automated approach and a tool environment that transforms global dynamic behaviors of systems expressed using UML models into their equivalent Maude specifications for analysis purposes. The approach is based on Graph Transformation and the Meta-Modeling tool AToM 3 is used. The approach is illustrated through an example.
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