We present an experimental method to fill in the existing gap of characterization tools for the mechanical testing of fused silica and silica’s polymorphic phases in the microand nanoscales. The approach is based on a monolithic tensile tester, entirely made of fused silica for which the same femtosecond laser in not only used for the fabrication of the device, but also for its operation (loadi...

The derivation of a compressor characteristic, and the experimental validation of a dynamic model for a variable speed centrifugal compressor using this characteristic, are presented. The dynamic compressor model of Fink et al. is used, and a variable speed compressor characteristic is derived by the use of energy transfer and loss analysis. It is demonstrated that taking into account the losse...

In the present paper, we study uniform approximation of bounded functions on an open subset of the Euclidean space d by means of harmonic functions arising as solutions of the classical or generalized Dirichlet problem. As a consequence of results obtained we establish a harmonic analogue of Sarason’s H + C – theorem; see e. g. [5]. We shall consider an arbitrary bounded open subset of , d ≥ 2....

Waves and currents coexist in a wide range of natural locations for the deployment offshore structures devices. This combined wave–current environment largely determines loading vertical surface piercing cylinders, which are foundations typically used wind turbines along with many other structures. The smoothed particle hydrodynamics (SPH) code DualSPHysics is to simulate focused waves on shear...

We present results for stiffness and damping prediction in a class of layered, wavy, metal–polymer composites that exceed conventionally published stiffness-damping maps (The Wang–Lakes line, see [14]). These composites are realized by judiciously placing selected, wavy, metal sheets that sandwich an ultra-thin layer of polymer. Stacks of alternating metal–polymer layered composites, when compr...

The electrical network is not a conventional communication medium. Moreover, in the traditional sense it is hostile. The modern sophistic methods of signals processing and communication enable its successful use as communication medium. The present paper investigates the features of the electrical power line – explicit noncoordinated loading and its modulation by the network voltage. The resear...

An electro-magnetic trap for cooling multi-charged ions (MCIs) with cold positrons has been designed and is now under construction. A 5-tesla superconducting solenoid in which the trap will be installed has been constructed and installed in the experimental hall. The cooling scheme of MCIs is as follows: 1) loading electrons in the trap on which an electric harmonic potential is applied, 2) coo...

Improved nonlinear organic chromophores of varying conjugation length with either thiobarbituric acid or 3-dicyanomethylene-2,3-dihydrobenzothiophene-1,1-dioxide (FORON® Blue) acceptors have been synthesized and investigated for their nonlinear optical properties. Very large quadratic hyperpolarizabilities b(22v; v, v) have been found, up to 25,700 3 10248 esu at l 5 1.91 mm. In a guest–host po...

Particle swarm optimization (PSO) algorithm is population-based heuristic global search algorithm inspired by social behavior patterns of organisms that live and interact within large groups. The PSO is based on researches on swarms such as fish schooling and bird flocking. Inspired by the classical PSO method and quantum mechanics theories, this work presents a quantum-inspired version of the ...