This paper presents the design, development and tests made to a fiber optic pressure sensor using multimodalinterference methodology (MMI) thus, we propose an alternative ones available which are limited byhigh robust environments where use of them is potential hazard (explosive gases, corrosion evenelectromagnetic fields). The range work for this 0 0.36 psi, arrangement used formed by laserdiode, sensing element, electronic amplifying circuit, data acquisition board computer. sensingelement...

Abstract Thermal stresses in a simplified steam turbine rotor model during cold startup are analyzed using finite element analysis (FEA). In order to validate the numerical model, an experimental array is developed which hollow cylinder heated with hot air external surface. At thick wall of cylinder, temperature distribution measured real time, while at same time algorithm computes thermal stresses. Additional computational fluid dynamics (CFD) calculations made obtain magnitudes velocity...

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El objetivo del presente artículo es comprender cómo los empresarios de pequeñas y medianas empresas (pyme) perciben el conocimiento financiero por medio las Tecnologías la Información Comunicación (tic) para que esta forma tomen decisiones beneficien a sus compañías. Mediante encuestas, se estudió, en materia conocimientos, sobre inversión crédito. Entre hallazgos, detectó creen este les ha ayudado acceder utilizar servicios financieros; sin embargo, encontró existe una relación compleja...

Microgas turbines (MGT) are an alternative for small-scale energy production; however, their small size becomes a drawback since it enhances the heat transfer among components. Moreover, drives to temperature gradients which become higher during transient cycles like start-up. The influence of different start-up curves on and thermal stresses microgas turbine was investigated. Stationary rotational blades were numerically simulated using CFD FEM commercial codes. Conjugated cases solved...

The dynamic range of a signal at the input measurement system during short circuit test is increased several times by nominal voltage. Saturation may occur in device under failure test. This paper introduces application nonlinear compensation to limit voltage controlled oscillator which used produce pulsed frequency modulation needed transmit analog signals over optical fiber links. proposed based on non-linear circuits accommodate oscillator. approach increases transient handling...

This paper presents a control mechanism for video compression and transmission that relies on spatio-temporal image segmentation non-uniform resolution representation. In the proposed scheme, linked pyramid structure is built over each frame. Therefore, sequence processed as 3D data batch instead of series 2D images. The based adaptive link principle. set links defined between nodes single extended to consecutive pyramids. According principle, pyramids are rearranged so given node at an...

Two distinct chemical methods, thermal reduction and hydrothermal method, were employed to deposit silver nanoparticles onto the nanowires. These silver-deposited nanowires termed "SERS substrates." Characterization was conducted using scanning electron microscopy (SEM) X-Ray diffraction (XRD) Raman spectroscopy. SEM, XRD analysis facilitated examination of nanoparticle deposition SERS substrates subjected rhodamine tests assess their effectiveness. Additionally, an investigation carried out...

The availability of an abundant and safe supply different types energy is one the strategic priorities contemporary society. In this sense, renewable energies will greatly contribute to economic, social environmental development. One with greatest potential marine due abundance kinetic available its zero contribution greenhouse gases. Wave has a high for use transform it into electricity, because 5 times more concentrated than wind energy, 10 30 solar electricity can be produced constantly...

The Environmental Thermal Sensation (STA) was determined from the meteorological variables Temperature (T), Relative Humidity (H) and Wind Speed (VV), this calculation is performed by algorithms used stations around world. simplification of these for daily use human beings, could be transformed into minor investments in monitoring equipment, which, information necessary making important timely decisions at local level care living beings an ecosystem. A mathematical representation greater...

Electricity is highly versatile in terms of generation, transformation, transmission and distribution, but its large-scale storage poses significant challenges. One the main obstacles facing electricity generation supply systems difficulty storing energy during periods low demand order to use it later at times high demand, a challenge particularly relevant context renewable energies. Renewable sources have fundamental disadvantage due their intermittent nature. The production from not...

Cybersecurity is fundamental nowadays, both in industrial environments as well homes and social networks. It of vital importance due to the fact that sensitive information constantly being entered into computing devices, which are easily accessible cybercriminals when there insufficient computer security, lack resources or simply out ignorance assumption one insignificant a target. Therefore, this article aims delve privacy policies understand data sent from an Android mobile device servers...

Iris recognition consists of measuring the unique patterns coloured and textured part eye (the iris), comparing obtained "signature" with those a dataset to verify authenticate identity. The uniqueness iris pattern makes technique more robust accurate for verification compared other biometric systems. One main challenges is ability work people on move at an increasing distance (over 1 metre). While first implementations require eyes be placed close sensor maintain static position during...