this research has tried to find most proper leadership styles based on a approved model to direct hospital manpower appropriately. the main objective of this research was the comparison between manager’s existing leadership styles and suggested styles to them in order to direct existing styles toward suggested ones. in this cross- sectional study all qom province hospital managers participated....

In the present study, small scale effect on critical buckling loads of triangular nano- composite plates under uniform in-plane compression is studied. Since at nano-scale the structure of the plate is discrete, the size dependent nonlocal elasticity theory is employed to develop an equivalent continuum plate model for this nanostructure incorporating the changes in its mechanical behavior. The...

‘Quasirationality’ (i.e., the combination of intuitive and analytic thought) is increasingly considered to be widespread and beneficial in management. This paper provides an overview of this concept as it is defined by Cognitive Continuum Theory (Hammond, 1996, 2000), and highlights the relevance of the theory for studying managerial judgment and decision making. According to Cognitive Continuu...

In this article, classical plate theory (CPT) is reformulated using the nonlocal differential constitutive relations of Eringen to develop an equivalent continuum model for orthotropic triangular nanoplates. The equations of motion are derived and the Galerkin’s approach in conjunction with the area coordinates is used as a basis for the solution. Nonlocal theories are employed to bring out the...

We study the zero mode and the spontaneous symmetry breaking on the light front. We use the discretized light-cone quantization a la Maskawa-Yamawaki to treat the zero mode in a clean separation from all other modes. It is then shown that the Nambu-Goldstone (NG) phase can be realized on the trivial light-front vacuum only when an explicit symmetry-breaking mass of the NG boson m is introduced....

this paper investigates the lateral vibration of single-layered graphene sheets based on a new theory called doublet mechanics with a length scale parameter. after a brief reviewing of doublet mechanics fundamentals, a sixth order partial differential equation that governs the lateral vibration of single-layered graphene sheets is derived. using doublet mechanics, the relation between natural f...

A linear stability analysis has been done to a magnetized disk under a linear gravity. We have reduced the linearized perturbation equations to a second-order differential equation which resembles the Schrödinger equation with the potential of a harmonic oscillator. Depending on the signs of energy and potential terms, eigensolutions can be classified into “continuum” and “discrete” families. W...

this paper presents the thermal vibration analysis of double-layer graphene sheet embedded in polymer elastic medium, using the plate theory and nonlocal continuum mechanics for small scale effects. the graphene is modeled based on continuum plate theory and the axial stress caused by the thermal effects is also considered. nonlocal governing equations of motion for this double-layer graphene s...

In this paper, we present a new control strategy for continuous backbone (continuum) ”trunk and tentacle” robots. Control of this emerging new class of robots has proved difficult due to the inherent complexity of their dynamics. Using a recently established full dynamic model, we introduce a new nonlinear model-based control strategy for continuum robots. The approach is applicable to continuu...