Cover Vol.5 No.1, February 2008

cover vol.5 no.1, february 2008

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Spotlight Issue No1 August 2008

• National adult HIV prevalence has declined from 7.0% in 2003/4 to 5.7% in 2007/8 • HIV prevalence has decreased for both women and men, and across most age groups. • The estimated number of people living with HIV in Tanzania in 2008 is approximately down from 1.12 million in 2004. • Seventeen out of twenty-one regions registered a decline in the proportion of 15-49 year HIV. • The proportion ...

Journal of Uncertain Systems, Vol5 No1, 2011, World Academic Union (World Academic Press)

Multi Period–Multi Product (MPMP) production planning problems are well-known in the literature and several researches had been carried out in this area. However, designing a well organized control mechanism in terms of time– cost point of views had not been taken into considerations. In this paper, such a control mechanism is implemented successfully using earned value analysis which is well-k...

Journal of Uncertain Systems, Vol5 No1, 2011, World Academic Union (World Academic Press)

This paper deals with rough set approach on lattice theory. We represent the lattices for rough sets determined by an equivalence relation. Without any loss of generality, we have defined the rough set as a pair of sets (lower approximation set, upper approximation set) and then we showed that the collection of all rough sets of an approximations by an equivalence relation form a lattice by som...

Journal of Uncertain Systems, Vol5 No1, 2011, World Academic Union (World Academic Press)

This paper deals with the problem of testing hypothesis when both the hypotheses and the available data are fuzzy. First, four different kinds of fuzzy hypotheses are defined. Then, a procedure is developed for constructing the fuzzy point estimation based on fuzzy data. Also, the concept of fuzzy test statistic is defined based on the α-cuts of the fuzzy null hypothesis and the α-cuts of the c...

Cover vol. 9, no.1, February 2012