The work presents a numerical methodology to simulate the dynamic behavior of reed type valves of reciprocating compressors used in refrigeration. A one-degree of freedom model is adopted for the reed motion and a finite volume method is employed to obtain the flow field through the valve. The valve dynamics and the time dependent flow field are coupled and solved simultaneously. As a first ste...

This paper presents an advanced method to optimise the compliant structure of force-torque sensors at the design stage. To this end, some researchers used finite element analysis on the whole compliant structure or some of its components, while others proposed performance indices based on mechanism theory. This work proposes a new approach, which relies on a symbolic formulation of the wrench-d...

Commonly, the product spectroscopic sequences available on commercial scanners don’t take full advantage of the scanner hardware. At an intermediate, now widely available field of 3T, issues like chemical shift displacement and contamination by external lipids become a problem, especially because of the low γB1 and the slow prescribed gradients. In this context, detection of metabolites at low ...

This paper presents an adaptive fuzzy backstepping control method that incorporates the dynamic equilibrium state (DES) theory to carry out path tracking for underactuated ships in presence of parameter variations and external disturbances induced by wind, wave and current. First, the optimal DES reference trajectories are designed for the sway displacement and the yaw angle. Then, by combining...

In this paper the axisymmetric problem on a semi-infinite cylindrical crack is considered. On the surfaces of the crack, the normal and tangential components of the traction are prescribed whereas the displacement vector components are unknown and supposed to be discontinuous. The problem is reduced to a 2 × 2 matrix Wiener–Hopf factorization. The solution is found by quadratures. Thus, this is...

Distinct electromagnetic properties can emerge from the three-dimensional (3D) configuration of a plasmonic nanostructure. Furthermore, the reconfiguration of a dynamic plasmonic nanostructure, driven by physical or chemical stimuli, may generate a tailored plasmonic response. In this work, we constructed a 3D reconfigurable plasmonic nanostructure with controllable, reversible conformational t...

The aim of the present work is to investigate the influence of the Mode-I crack on the plane waves in a linearly fiber-reinforced. A general model of the equations of coupled theory (CD) and Lord-Shulman (LS) theory with one relaxation time are applied to study the influence of reinforcement on the total deformation for an infinite space weakened by a finite linear opening Mode-I crack is solvi...

An experimental-numerical methodology is introduced to identify the parameters of a cohesive law of an adhesive layer within a joined assembly on the basis of kinematic data provided by digital image correlation. Nonconventional experiments on joined samples were designed to generate within the assembly and the adhesive film complex strain and stress states close to those expected in service an...

Numerical experiments are conducted for two-dimensional model problems of tsunami generation by underwater slides and slumps. These problems consist of a semi-ellipse, translating down an incline with a prescribed center of mass motion. For each problem, this motion is derived as a function of geometric and material parameters, and we calculate corresponding characteristic tsunami amplitudes. L...

A 46-year-old woman with moderate lens subluxation and Marfan ́s syndrome underwent a phacoemulsification on the right eye with a sutureless Henderson Capsular Tension Ring (HCTR) implantation. The surgical procedure and the postoperative follow up period were uneventful, with a best corrected visual acuity (BCVA) of 0 (LogMAR). Seven months after surgery the patient presented an inferomedial di...