In 1982, the Belgian Pilots' Guild raised the question of what effect exposure to radar radiation--for example, that encountered in passing a pilot launch's radar--might have on the human body. Recapitulating investigations of this question, this article states that in 25 years of experience with radar, there have been no known incidents of pilots being affected by radar waves. In the future, however, involvement by some pilots with Vessel Traffic Service shore-based radar could affect pilots somewhat differently from limited exposure to pilot launch radar. Pilots who find themselves in new working conditions close to an emitting source should exercise care all times.

About heat waves

Wind energy is the fastest growing alternate source of energy in the world since its purely economic potential is complemented by its great positive environmental impact. The wind turbine, whether it may be a Horizontal-Axis Wind Turbine (HAWT) or a Vertical-Axis Wind Turbine (VAWT), offers a practical way to convert the wind energy into electrical or mechanical energy. Although this book focuses on the aerodynamic design and performance of VAWTs based on the Darrieus concept, it also discusses the comparison between HAWTs and VAWTs, future trends in design and the inherent socio-economic and environmental friendly aspects of wind energy as an alternate source of energy.

Wind turbine design with emphasis on Darrieus concept Ion Paraschivoiu

In this paper, we consider the existence and uniqueness of weak solutions for a class of fractional superdiffusion equations with initial-boundary conditions. For a multidimensional fractional drift superdiffusion equation, we just consider the simplest case with divergence-free drift velocity $u \in L^{2}(\Omega)$
 only depending on the spatial variable x. Finally, exploiting the Schauder fixed point theorem combined with the Arzela-Ascoli compactness theorem, we obtain the existence and uniqueness of weak solutions in the standard Banach space $C([0,T]; H_{0}^{1}(\Omega))$
 for a class of fractional superdiffusion equations.

/pdf/existence-and-uniqueness-of-weak-solutions-for-a-class-of-l0gkkyq2ke.pdf

Existence and uniqueness of weak solutions for a class of fractional superdiffusion equations

This article addresses the time-dependent flow of magnetized rheological Carreau nanoliquid conveying microorganisms over a moving wedge with velocity slip and thermal radiation features. Carreau fluid is auspicious to depict several types of physical issues because this fluid model has the capability of revealing the rheology of multiple specific fluids such as fluids with brief-chain suspension particles, fluid crystals, detergents, and blood in animals and humans. The mathematical formulation is developed by combining the impact of infinite shear rate viscosity. The physical aspects for both static and moving are discussed in detail. At first, relevant similarity transformations are employed to obtain dimensionless form of equations, and then renovated equations have been solved numerically by employing bvp4c via MATLAB based on shooting technique. Both the numerical and graphical results against physical quantities, such as velocity temperature, nanoparticles concentration and density of gyrotactic microorganism, are observed under the influence of physical parameters.

Bioconvection flow of magnetized Carreau nanofluid under the influence of slip over a wedge with motile microorganisms

Magnetic force effects on peristaltic transport of hybrid bio-nanofluid (AuCu nanoparticles) with moderate Reynolds number: An expanding horizon

In this study, the motion equations of a one-dimensional finite element having a general three-dimensional motion together the body are established, using the Lagrange’s equations. The problem is important in technical applications of the last decades, characterized by high velocities and high applied loads. This leads to qualitative different mechanical phenomena (high deformations, resonance, stability), mainly due to the Coriolis effects and relative motions.

Motion equation for a flexible one-dimensional element used in the dynamical analysis of a multibody system

We first formulate the mixed backward in time problem in the context of thermoelasticity for dipolar materials. To prove the consistency of this mixed problem, our first main result is regarding the uniqueness of the solution for this problem. This is obtained based on some auxiliary results, namely, four integral identities. The second main result is regarding the temporal behavior of our thermoelastic body with a dipolar structure. This behavior is studied by means of some relations on a partition of various parts of the energy associated to the solution of the problem.

https://www.mdpi.com/2073-8994/11/7/863/pdf

On the Partition of Energies for the Backward in Time Problem of Thermoelastic Materials with a Dipolar Structure

Engineering practice imposes an increased rigidity of mechanical elements that are parts of machinery or equipment used in practice. Circular plates are such elements, especially used in many commo...

Improved rigidity of composite circular plates through radial ribs

In this study we want to extend the results of B Straughan, which quite recently addressed the issue of double porosity structure for classical elastic bodies In this case, the double porosity structure of the body is not influenced by the displacement field, which is not consistent with reality For the mixed initial boundary value problem in the context of micropolar bodies with double porosity, we prove the existence of the solution, its uniqueness as well as some considerations on stability of solution

Considerations on double porosity structure for micropolar bodies

An important stage in an analysis of a multibody system (MBS) with elastic elements by the finite element method is the assembly of the equations of motion for the whole system. This assembly, which seems like an empirical process as it is applied and described, is in fact the result of applying variational formulations to the whole considered system, putting together all the finite elements used in modeling and introducing constraints between the elements, which are, in general, nonholonomic. In the paper, we apply the method of Maggi’s equations to realize the assembly of the equations of motion for a planar mechanical systems using finite two-dimensional elements. This presents some advantages in the case of mechanical systems with nonholonomic liaisons.

/pdf/new-analytical-method-based-on-dynamic-response-of-planar-dyq09go42x.pdf

Sorin Vlase

Papers

Motion equation for a flexible one-dimensional element used in the dynamical analysis of a multibody system

On the Partition of Energies for the Backward in Time Problem of Thermoelastic Materials with a Dipolar Structure

Improved rigidity of composite circular plates through radial ribs

Considerations on double porosity structure for micropolar bodies

New analytical method based on dynamic response of planar mechanical elastic systems