Background In early 2012, National Health Insurance Scheme (NHIS) members in Ashanti Region were allowed to choose their own primary healthcare providers. This paper investigates the factors that enrolees in the Ashanti Region considered in choosing preferred primary healthcare providers (PPPs) and direction of association of such factors with the choice of PPP.   Methods Using a cross-sectiona...

This paper gives close attention to the term ‘Multiplayer Online Battle Arena’ (MOBA), establishing what it implies in popular discourses as a term with specific generic connotations and more critically, what its short but eventful history represents alongside wider participatory trends across the Internet. Despite its far reaching influence and now commonplace usage, MOBA is not a neutral term...

(1) Any LT wi th S as i t s roo t m u s t have A as a daughte r . (2) No LT wi th C as a d a u g h t e r a l so has D as a daughter . S t a t e m e n t s such as (1) and (2) are CCRs. CCRs are exp re s s ions of f i r s t o rde r predica te logic us ing t wo pr imi t ive pred ica tes , R(a, t) 'el is the roo t o f LT t' and D(eL, t) 'el is a d a u g h t e r in LT t'. [1] CCRs have one of the th...

Problem 1 (a) Recall that the null space and the range of a matrix A ∈ C m×n are defined as: N (A) = {x ∈ C n |Ax = 0} R(A) = {y ∈ C m |y = Ax, for some x ∈ C n } Note that N (A) is a subspace of C n since it contains 0 ∈ C n (A0 = 0) and is closed under addition and scalar multiplication: x 1 , x 2 ∈ N (A) ⇒ Ax 1 = 0 and Ax 2 = 0 ⇒ Ax 1 + Ax 2 = 0 ⇒ A(x 1 + x 2) = 0 ⇒ x 1 + x 2 ∈ N (A) x ∈ N (...

Reputation management is a powerful security tool that helps establish the trustworthiness of users in online applications. One of the most successful use of reputation systems is on e-commerce web sites such as eBay.com and Amazon.com, which use reputation systems to root out fraudulent sellers. Reputation systems can also play an important role in social networks to enforce various security r...

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