We compare multivariate aging notions of conditionally independent lifetimes with corresponding univariate aging notions of their one-dimensional marginal distributions. Let G(t|θ) (t ≥ 0) be a one-dimensional survival function indexed by θ; for simplicity’s sake, we assume here that θ is a non-negative scalar quantity; let, furthermore, Π be a probability distribution over [0,∞) and consider t...

We investigate out-of-equilibrium stationary processes emerging in a Discrete Nonlinear Schrödinger chain in contact with a heat reservoir (a bath) at temperature TL and a pure dissipator (a sink) acting on opposite edges. We observe two different regimes. For small heat-bath temperatures TL and chemical-potentials, temperature profiles across the chain display a non-monotonous shape, remain re...

We study the impact of power state transitions on the lifetime of base stations (BSs) in mobile networks. In particular, we propose a model to estimate the lifetime decrease/increase as a consequence of the application of power state changes. The model takes into account both hardware (HW) parameters, which depend on the materials used to build the device, and power state parameters, that inste...

This research uses soft system methodology in exploring a real world problem in managing the performance of banks’ branches. In the first step, a rich picture is drawn based on the semistructured interviews with experienced personnel and managers of Iranian commercial banks. Extracting a rich picture about the problem situation and roots of the problem, and based on literature review and well-k...

despite a renewed focus in the field of global health on strengthening health systems, inadequate attention has been directed to a key ingredient of high-performing health systems: management. we aimed to develop the argument that management – defined here as the process of achieving predetermined objectives through human, financial, and technical resources – is a cross-cutting function necessa...

the current limited focus on management in global health activities is highly problematic given the amounts of financial and human resources that are pouring into health system strengthening interventions and the complexity of clinical operations across settings. by ensuring that public health and healthcare practitioners in domestic and international settings receive management training in the...

background and aims: given the ever-increasing importance and value of information, providing management with a reliable information system, which can facilitate decision making regarding planning, organization and control, is vitally important. this study aimed to analyze and evaluate information needs at statistics and medical records departments of iranian medical universities. the findings ...

Rebooting is one of the commonly used approaches to recover from undesired crash or performance degradation in software systems. Recently, however, planned and periodic restart or rejuvenation has been proposed as a reliability management tool for avoiding unwanted failure of long-running systems. This paper presents an interesting observation that periodic rejuvenation alters the lifetime dist...

There is much to be said for entrusting the long-term management of children with congenital nasal defects to a few large centres, where the necessary radiological, maxillofacial, neurosurgical and other skills are readily available. Few otolaryngologists will gain significant experience, during their working lifetime, in the care of such children and, moreover, many of these patients have addi...

The design of wireless embedded systems for real-time applications requires a careful management of timing and energy requirements. This paper describes a wireless communication protocol that can guarantee both message deadlines and system lifetime by properly allocating the network bandwidth to each node. The protocol allows multi-hop wireless communication under different network topologies. ...