Atividades profissionais do engenheiro de produção: da formação universitária ao exercício profissional

Atualmente, o ambiente empresarial encontra-se em constante transformação. Muitas das premissas consideradas há anos não são suficientes para adequar as empresas ao novo modelo de competitividade. Neste sentido, ao profissional também são impostas mudanças relacionadas à sua atuação dentro da sociedade. Porém, parece que essas imposições não são atendidas pelas instituições formadoras desse profissional, devido, muitas vezes, à lentidão na reformulação dos currículos. No caso do curso de Engenharia de Produção, essa realidade não é diferente. Assim, neste trabalho é dada ênfase aos aspectos relativos à situação do ensino de Engenharia de Produção, com o objetivo de identificar as atividades profissionais do engenheiro de produção, que podem servir como referência para o desenvolvimento de objetivos de ensino que contribuam para a melhoria curricular, de acordo com as reais necessidades da sociedade.

Vapor-liquid equilibria using the Gibbs energy and the common tangent plane criterion

Phase thermodynamics is often perceived as a difficult subject that many students never become fully comfortable with. The Gibbsian geometrical framework can help students to gain a better understanding of phase equilibria. An exercise to interpret the vapor-liquid equilibrium of a binary azeotropic mixture, using the equilibrium condition based on the common tangent plane criterion (the Gibbs stability test), is presented in this paper. From a T-composition phase diagram for the mixture, the temperature is set at different values: above, intermediate to, and below the boiling temperatures of the pure components, to intersect different regions of the system. Students prepare an Excel spreadsheet where the Gibbs energy of mixing of the vapor and liquid mixtures are calculated and represented over the whole range of compositions and then, apply the Gibbs stability test to ascertain the aggregation state of the system and to calculate the VL phase equilibrium compositions. Finally, Matlab is used to generate the 3D Gibbs energy of mixing surfaces for both phases over the whole range of temperatures which facilitates the geometrical interpretation of the vapor-liquid equilibrium.

Dirección estratégica de la asignatura Dirección Estratégica de las Tecnologías de la Información

¿Se pueden utilizar las habilidades, las técnicas y los principios de la dirección estratégica en el diseño y ejecución de la programación docente de una asignatura? Esta es la pregunta que nos planteamos al diseñar la asignatura Dirección Estratégica de las Tecnologías de la Información perteneciente al Máster Universitario en Ingeniería Informática de la Universidad de Alicante. Estas técnicas las aplicaremos a aspectos clave de la innovación educativa: contrato pedagógico, objetivos, evaluación, trabajo en equipo y comunicación oral. Algunas de las propuestas innovadoras, que tienen el doble objetivo de ser un instrumento de la asignatura pero al mismo tiempo recoger aspectos de dirección y de mejora continua, son el SLA (“Service Level Agreement”) de aprendizaje, las actas de aprendizaje, el análisis de tendencias en las TI y el espacio para la creatividad. Tras dos cursos académicos de ajuste de la propuesta docente, en el curso 2014-2015 hemos analizado el nivel de satisfacción de los estudiantes con la misma y la autoevaluación crítica de los profesores que la han impartido. Los resultados han sido muy satisfactorios, con comentarios del estilo “ha sido una experiencia de aprendizaje efectivo”. Los estudiantes agradecen que los profesores prediquemos con el ejemplo. Nos hace más humanos y más creíbles.

Experiences on using Arduino for laboratory experiments of Automatic Control and Robotics

The free hardware platforms have become very important in engineering education in recent years. Among these platforms, Arduino highlights, characterized by its versatility, popularity and low price. This paper describes the implementation of four laboratory experiments for Automatic Control and Robotics courses at the University of Alicante, which have been developed based on Arduino and other existing equipment. Results were evaluated taking into account the views of students, concluding that the proposed experiments have been attractive to them, and they have acquired the knowledge about hardware configuration and programming that was intended.

A Cloud-based Framework for Security Analysis of Browser Extensions

In today's internet world, web browsers are an integral part of our day-to-day activities. Therefore, web browser security is a serious concern for all of us. Browsers can be breached in different ways. Because of the over privileged access, extensions are responsible for many security issues. Browser vendors try to keep safe extensions in their official extension galleries. However, their security control measures are not always effective and adequate. The distribution of unsafe extensions through different social engineering techniques is also a very common practice. Therefore, before installation, users should thoroughly analyze the security of browser extensions. Extensions are not only available for desktop browsers, but many mobile browsers, for example, Firefox for Android and UC browser for Android, are also furnished with extension features. Mobile devices have various resource constraints in terms of computational capabilities, power, network bandwidth, etc. Hence, conventional extension security analysis techniques cannot be efficiently used by end users to examine mobile browser extension security issues. To overcome the inadequacies of the existing approaches, we propose CLOUBEX, a CLOUd-based security analysis framework for both desktop and mobile Browser EXtensions. This framework uses a client-server architecture model. In this framework, compute-intensive security analysis tasks are generally executed in a high-speed computing server hosted in a cloud environment. CLOUBEX is also enriched with a number of essential features, such as client-side analysis, requirements-driven analysis, high performance, and dynamic decision making. At present, the Firefox extension ecosystem is most susceptible to different security attacks. Hence, the framework is implemented for the security analysis of the Firefox desktop and Firefox for Android mobile browser extensions. A static taint analysis is used to identify malicious information flows in the Firefox extensions. In CLOUBEX, there are three analysis modes. A dynamic decision making algorithm assists us to select the best option based on some important parameters, such as the processing speed of a client device and network connection speed. Using the best analysis mode, performance and power consumption are improved significantly. In the future, this framework can be leveraged for the security analysis of other desktop and mobile browser extensions, too.

DESIGN OF A MINIATURIZED SOP INTEGRATED GNSS RF FRONT-END MODULE

Navigation devices used to be bulky and expensive and were not widely commercialized for personal use. Nowadays, all useful electronic devices are turning into being handheld so that they can be conveniently used anytime and anywhere. One can claim that almost any mobile phone, used today, has quite strong navigational capabilities that can efficiently work anywhere in the globe. No matter where you are, you can easily know your exact location and make your way smoothly to wherever you would like to go. This couldn’t have been made possible without the existence of efficient and small microwave circuits responsible for the transmission and reception of high quality navigation signals. This thesis is mainly concerned with the design of novel highly miniaturized and efficient filtering components working in the Global Navigational Satellite Systems (GNSS) frequency band to be integrated within an efficient Radio Frequency (RF) front-end module (FEM). A System-on-Package (SoP) integration technique is adopted for the design of all the components in this thesis. Two novel miniaturized filters are designed, where one of them is a wideband filter targeting the complete GNSS band with a fractional bandwidth of almost 50% at a center frequency of 1.385 GHz. This filter utilizes a direct inductive coupling topology to achieve the required wide band performance. It also has very good out-of-band rejection and low IL. Whereas the other dual band filter will only cover the lower and upper GNSS bands with a rejection notch in between the two bands. It has very good inter band rejection. The well-known “divide and conquer” design methodology was applied for the design of this filter to help save valuable design and optimization time. Moreover, the performance of two commercially available ultra-Low Noise Amplifiers (LNAs) is studied. The complete RF FEM showed promising preliminary performance in terms of noise figure, gain and bandwidth, where it out performed other commercial front-ends in these three aspects. All the designed circuits are fabricated and tested. The measured results are found to be in good agreements with the simulations.

BIDIRECTIONAL AC-DC CONVERTERS USING ONE CYCLE CONTROL (OCC) FOR ELECTRIC VEHICLES

The electric vehicle (EV) market has seen a rapid growth in the recent past. With an increase in the number of electric vehicles on road, there is an increase in the number of high capacity battery banks interfacing the grid. The battery bank of an EV, besides being the fuel tank, is also a huge energy storage unit. Presently, it is used only when the vehicle is being driven and remains idle for rest of the time, rendering it underutilized. Whereas on the other hand, there is a need of large energy storage units in the grid to filter out the fluctuations of supply and demand during a day. EVs can help bridge this gap. The EV battery bank can be used to store the excess energy from the grid to vehicle (G2V) or supply stored energy from the vehicle to grid (V2G ), when required. To let power flow happen, in both directions, a bidirectional AC-DC converter is required. This thesis concentrates on the bidirectional AC-DC converters which have a control on power flow in all four quadrants for the application of EV battery interfacing with the grid. This thesis presents a bidirectional interleaved full bridge converter topology. This helps in increasing the power processing and current handling capability of the converter which makes it suitable for the purpose of EVs. Further, the benefit of using the interleaved topology is that it increases the power density of the converter. This ensures optimization of space usage with the same power handling capacity. The proposed interleaved converter consists of two full bridges. The corresponding gate pulses of each switch, in one cell, are phase shifted by 180 degrees from those of the other cell. The proposed converter control is based on the one-cycle controller. To meet the challenge of new requirements of reactive power handling capabilities for grid connected converters, posed by the utilities, the controller is modified to make it suitable to process the reactive power. A fictitious current derived from the grid voltage is introduced in the controller, which controls the converter performance. The current references are generated using the second order generalized integrators (SOGI) and phase locked loop (PLL). A digital implementation of the proposed control ii scheme is developed and implemented using DSP hardware. The simulated and experimental results, based on the converter topology and control technique discussed here, are presented to show the performance of the proposed theory.

The hardware design of a cognitive model demonstrator /

"Supported in part by Contract No. U.S. AEC(11-1)1469."

The University of Illinois attached machine operating system: design criteria and program logic,

"Supported in part by National Science Foundation under Grant No. NSF-GP-7634."

A deterministic procedure for the design of carry-save adders and borrow-save subtracters /

"To be presented at the First Annual IEEE Computer Conference, Chicago, Illinois, September 6-8, 1967."

Syllabus of mathematics: a symposium

Mode of access: Internet.

Proceedings.

Meeting for 1894 held in conjunction with the American Association for the Advancement of Science

Year book.

Mode of access: Internet.

Advanced automation for space missions : proceedings of the 1980 NASA/ASEE Summer Study /

Includes bibliographies.

Chrysler Center construction

Swanson Associates, architects