background: sleep disorders among heart failure (hf) patients negatively influence the quality of life. awareness of sleep disturbances, as one of the disturbing factors of the quality of life among hf patients, and its related factors would help health care staff to provide more comprehensive care. hence, this study was conducted to determine the quality of sleep and its related factors in hos...

Flow, the concept developed by Mihaly Csikszentmihalyi over the last forty years or so (see Csikszentmihalyi 1975) has been invoked quite often with respect to the way players engage with digital games (e.g. Baron 2012; Cowley et al. 2008; Sweetser and Wyeth 2005; Brathwaite & Schreiber, 2009; Fullerton, Swain, & Hoffman, 2008; Schell, 2008). However Kubey & Csikszentmihalyi (2002) argue that ‘...

Enterprise resource planning (ERP) packages provide generic off-the-shelf business and software solutions to customers. However, these packages are implemented in companies with different organisational and national cultures, and there is growing evidence that failure to adapt ERP packages to fit these cultures leads to projects that are expensive and late. This paper describes research that sy...

Let (Wt)0≤t≤1 be an r-dimensional Wiener process defined on a probability space (Ω, , P) and let ( t)0≤t≤1 denote the natural filtration of (Wt) such that 0 contains all P-null sets of . Let ξ be an 1-measurable d-dimensional square-integrable random variable. Let f be an Rd-valued process defined on R+ ×Ω×Rd ×Rd×r with values in Rd such that for all (y,z) ∈ Rd ×Rd×r , the map (t,ω) → f (t,ω, y...

In thiswork, the depreciation effect of public goods is considered in the public goods games, which is realized by rescaling the multiplication factor r of each group as r ′ = r( nc G ) β (β ≥ 0). It is assumed that each individual enjoys the full profit r of the public goods if all the players of this group are cooperators. Otherwise, the value of public goods is reduced to r . It is found tha...

where a, c : Z ® R+ are T-periodic functions, f Î C(Z × (0, ∞), R) is T-periodic with respect to t and singular at u = 0. Positive periodic solutions of second-order difference equations have been studied by many authors, see [1-6]. However, in these therein, the nonlinearities are nonsingular, what would happen if the nonlinearity term is singular? It is of interest to note here that singular ...

Visualization of incomplete data allows to simultaneously explore the data and the structure of missing values. This is helpful for learning about the distribution of the incomplete information in the data, and to identify possible structures of the missing values and their relation to the available information. The main goal of this contribution is to stress the importance of exploring missing...

a r t i c l e i n f o a b s t r a c t In this paper we deal with the N-dimensional Stokes system in a bounded domain with Dirichlet boundary conditions. The main result establishes the null controllability with internal controls having one vanishing component. This result improves the one

Consider the class of n-dimensional Riemannian spin manifolds with bounded sectional curvatures and diameter, and almost non-negative scalar curvature. Let r = 1 if n = 2, 3 and r = 2 + 1 if n ≥ 4. We show that if the square of the Dirac operator on such a manifold has r small eigenvalues, then the manifold is diffeomorphic to a nilmanifold and has trivial spin structure. Equivalently, if M is ...