Surface effect on forced vibration of DNS by viscoelastic layer under a moving load

The surface effect for a forced vibration of a double-nanobeam-system (DNS) coupled by a viscoelastic layer under a moving constant load is studied in this paper. The viscoelastic layer that couples the nanobeams to each other, is modelled as spring-damper system. The Euler- Bernoulli theory and a simply supported boundary condition are considered for both nanobeams. By using the analytical solution, the dynamic displacement is obtained by considering the surface elasticity and residual tension effect on each nanobeams. Furthermore, the several significant parameters such as the velocity of the moving load, spring constant, damping coefficient and also the surface effect have been studied using some plots and examples. Finally, by observing the diagrams it was concluded that as the length of the beams reduces, the surface effect has a considerable effect on each of nanobeams especially at Nano scale, where it was not achieved by classic theories

INTERNAL TECHNOLOGY TRANSFER BARRIERS IN DEVELOPING COUNTRIES

Studying and contemplating the current managerial structure of developed countries show that management and its strategic results have lost their own traditional and usual concept. In advanced countries, modern management has been developed by using new knowledge-based infrastructures methods. Managerial knowledge-based methods are a strategic solution to promote the control level, scientific and fundamental guidance of sciences in reaching defined programs and policies. This trend with the analysis of modern knowledge-based management in developed countries introduces new managerial backgrounds to us. For this reason, their managerial policies and reactions in encountering with inter-organizational or non-organizational problems and crises are appeared more guided than traditional management in developing countries. At present, the main index and identification of appropriate strategy of modern and knowledge-based management can be observed in the control process of crisis and natural disasters in developed countries that are extremely consistent and their crisis management methods based on the application of modern technologies and equipment. Therefore, the failure factors of developing countries in management should be considered in the lack of knowledge-based management. These countries have to be pioneer in the management and optimum guide of predicted and unpredicted organizational and non-organizational events like advanced countries

Ʌ-Hypernuclear States as Dihadronic Molecules

The study of exotic hypernuclei attracts a great deal of interest in nuclear physics. The reality of heavy hyperon hypernuclei is the subject of intense concern among theoreticians and experimenters in recent years. The core-hyperon model uses to explain abnormal nuclei spectra, recent observations of new exotic heavy hyperon hypernuclei cannot be explained or predicted by ordinary heavy core nuclei. These exotic hypernuclei states are a two-cluster bound states. We calculate the mass spectrum and constituent mass of particles in hypernuclei using the relativistic Schrödinger equation with molecular pseudoharmonic-type potential between particles inside the core and hyperon. Such calculations represent the interaction between the hyperon and the nuclei core. I review recent theoretical studies on the ground states and the excited states of hypernuclei bound states. Finally, we present explicit predictions of the exotic bound states based on the interactions obtained from quantum field theory and the projective unitary representation model. Studies have shown that by increasing the mass number of hyperon-core states,  the value of the constituent mass and energy eigenvalue of Ʌ-hypernucleus increases. Also, by growing and increasing the proton number in the (Ʌ-N) states the value of the constituent mass of Ʌ-hyperon increases

Is it appropriate to use Western guidelines for breaking bad news in non-Western emergency departments? A patients� perspective

Objective: To find whether Western guidelines on breaking bad news in a nonemergency department are appropriate for an emergency department of a non-Western country; according to patients� preferences. Method: We designed a 19 items questionnaire of Likert-type scale and interviewed 156 patients in the emergency department of a referral hospital in Iran. Results: The patients� preferences in 9 out of 19 statements were similar to the guidelines. �Using the maternal language� received the strongest agreement. The strongest disagreement was on �encouraging the patients to talk after receiving bad news.� The summative scores of subsection indicated strong agreement for cultural issues, followed by communication skills, breaking bad news session, and privacy. Conclusion: The patients� preferences were not completely consistent with the guidelines.We could not determine if it was a situational or cultural issue. However, it is reasonable to design a new guideline for breaking bad news, considering these factors. � The Author(s) 2015

Non-relativistic bound state solutions with

In this work, we studied the bound states and quantum theoretic-information measurements of an $$\alpha$$-deformed Kratzer-type potential with the Schrodinger equation. The ground state wave function in position-momentum spaces and the energy spectra equations for arbitrary quantum numbers are obtained in closed-form via the super-symmetric WKB method and Fourier transform. The obtained energy equation is bounded and reduces to the molecular Kratzer-type energy and the hydrogenic Coulomb’s energy upon proper adjustment of potential parameters. The wave function was used to obtain the Fisher, Shannon, Rényi and Tsallis theoretic-information measures numerically. Our results for the information measures obey the local Fisher inequality and the Bialynicki-Birula–Mycielski inequality. The Rényi and Tsallis entropies in position-momentum spaces were obtained for the index number $$q = 0.5$$ and $$q = 2$$ as a function of the potential parameter. The results of the theoretic-information quantities and probability densities revealed that the potential parameters strongly influence the localization and delocalization of the position of a nano particle

The influence of external magnetic and Aharonov–Bohm flux fields on bound states of the Klein–Gordon and Schrodinger equations via the SWKB approach

We obtained the approximate two-dimensional bound states solutions of a Klein–Gordon particle moving in a quantum mechanical solvable potential under the influence of the external magnetic and Aharonov–Bohm flux fields. We utilized the supersymmetric WKB approach to obtain both the energy levels and normalized wave function in closed form. The proposed potential reduces to the screened Kratzer, Kratzer, Yukawa and Coulomb potential functions as special cases and admits the corresponding energy eigenvalues in both relativistic and non-relativistic regimes. When the external magnetic and Aharonov–Bohm flux fields were turned off, the relativistic, non-relativistic energies and ground state probability density overlap for the magnetic quantum numbers ($$m = - 1,1$$). The presence of the fields removes the degeneracy and shifts the energy levels of the Klein–Gordon particle. However, we found that the magnetic field strength has no effects on the maximum non-relativistic energy. Generally, the results are consistent with the works in existing literature where the authors utilized different forms of potential energy functions

Information-theoretic measures and thermodynamic properties under magnetic and Aharonov–Bohm flux fields

We investigated the effects of external magnetic and Aharonov–Bohm flux fields on the thermodynamic properties, Fisher, Shannon and Rényi information-theoretic measures using the non-relativistic Schrödinger equation with a Varshni-type potential. We adopted the parametric Nikiforov–Uvarov approach to obtain the analytical bound states in closed form. The thermodynamic functions such as the free energy, specific heat capacity, vibrational entropy and mean energy were analyzed. Also, the results for the 2D Fisher's information-theoretic measure obey the inequality $$I\left(\rho \right)I\left(\gamma \right)\ge 16$$. The Rényi entropies sum applied to lithium hydride (LiH) diatomic molecule obeys the inequality $${R}_{2}\left(\rho \right)$$+$${R}_{2/3}\left(\gamma \right)\ge$$ 4.19926 for 2D system. Also, the global Shannon entropies sum inequality for the LiH molecule is verified. The applications of the external fields were found to strongly influence the splitting of the energy overlaps, the thermodynamic functions and the information-theoretic measures. The results may aid the understanding of the dynamics of quantum particles and molecules in external fields