Partial coherent states in graphene

Producción CientíficaWe employ a symmetric gauge to describe the interaction of electrons in graphene with a magnetic field which is orthogonal to the layer surface and to build the so-called partial and bidimensional coherent states for this system in the Barut-Girardello sense. We also evaluate the corresponding probability and current densities as well as the mean energy value.Junta de Castilla y León (projects VA137G18 and BU229P18)Ministerio de Economía, Industria y Competitividad (project MTM2014-57129-C2-1-P

Aprendizaje servicio+aprendizaje basado en proyectos: un binomio de éxito para trabajar el compromiso social y la ciencia de materiales en estudios universitarios de ingeniería

El aprendizaje basado en proyectos (ABP) ha demostrado ser una metodología eficaz para la adquisición de conocimientos y competencias clave en el ámbito universitario, del mismo modo las experiencias Service Learning (SL) permiten trabajar la Responsabilidad Social Universitaria (USR). Sin embargo, el nivel de adquisición de competencias depende en gran medida de la metodología docente empleada. En este trabajo se muestra la implementación y el desarrollo de una experiencia ABP de aprendizaje-servicio, en una asignatura de grado de ingeniería y en el ámbito de ciencia de los materiales. Se presentarán también los resultados obtenidos, así como las principales conclusiones a las que se ha llegad

High level production of the recombinant gag24 protein from HIV-1 IN Escherichia coli

The gag24 gene of the Human Immunodeficiency Virus type 1 (HIV-1) was expressed under the control of the tryptophan promoter in Escherichia coli. The effect of several parameters on the production of gag24 was studied. The expression level achieved (25%) depended on the host strain and the induction conditions. The developed fermentative process was scaled-up to 50 L, where 417 mg/L of volumetric production and 34 mg/L.h of productivity, were obtained.Keywords: Escherichia coli, gag24, HIV-1, scale-u

Achieving competence-based curriculum in Engineering Education in Spain

5 tables, 5 figures, 10 pagesThe fact of placing competences and outcomes learning at the heart of the academic activity means overhauling the curricular architecture of higher education in Europe. Some universities have undergone important transformations moving toward a competence-based learning environment, while others maintain traditional curriculum packaged formats. In the realm of the European Higher Education Area, this paper examines the use of competence-based initiatives in curricular development for engineering degrees with special focus to the Spanish case. Although the concept of competence and competence-based learning has a long history in education and training research, these terms are still very diffuse and demand a clear conceptualization. In the first part of this paper, we provide a conceptual overview and a critical reflection of competences as implemented in a wide range of settings, including its origins, key concepts, and definitions. Next, we discuss the purposes, principles, pitfalls, and processes that enable defining a map of competences within engineering education. Lastly, we present a pilot project involving curriculum development and faculty enhancement within a competence-based learning initiative in Electronic Engineering.This work was supported in part by the Program of European Convergence (Universidad Politécnica de Valencia) and developed within the Project of Adaptation to the European Higher Education in the School of Design Engineering.Peer reviewe

FM Continuous Monitoring of Intraocular Pressure, an Engineering Perspective

This chapter discusses the problem of continuously monitoring intraocular pressure (IOP) from an engineering perspective. It is aimed to all public in general although we think that medical staff and engineers may benefit the most from it. Although equations are included for engineers to get a glimpse of how the system works, this chapter does not go into great detail in mathematics and physics to make it understandable to medical staff. It provides though references for engineers who wish to get a better understanding of key subjects tackled in this chapter. The chapter is organized as follows: Section 1 introduces intraocular pressure (IOP) and need for its continuous monitoring. Section 2 describes the most recent efforts to develop a continuous IOP monitoring system. Section 3 shows what medical and engineering considerations must be taken into account to effectively measure IOP. Section 4 deals with health issues due to tissue warming and how to prevent them. Section 5 explains how an implant can be fabricated using either passive electronic components or active ones. Finally, Section 6 explains how the pressure sensor and the electronic circuits can be integrated

Equilibration of Concentrated Hard Sphere Fluids

We report a systematic molecular dynamics study of the isochoric equilibration of hard-sphere fluids in their metastable regime close to the glass transition. The thermalization process starts with the system prepared in a non-equilibrium state with the desired final volume fraction {\phi} but with a prescribed non-equilibrium static structure factor S_0(k; {\phi}). The evolution of the {\alpha}- relaxation time {\tau}{\alpha} (k) and long-time self-diffusion coefficient DL as a function of the evolution time tw is then monitored for an array of volume fractions. For a given waiting time the plot of {\tau}{\alpha} (k; {\phi}, tw) as a function of {\phi} exhibits two regimes corresponding to samples that have fully equilibrated within this waiting time ({\phi} \leq {\phi}(c) (tw)), and to samples for which equilibration is not yet complete ({\phi} \geq {\phi}(c) (tw)). The crossover volume fraction {\phi}(c) (tw) increases with tw but seems to saturate to a value {\phi}(a) \equiv {\phi}(c) (tw \rightarrow \infty) \approx 0.582. We also find that the waiting time t^(eq)_w({\phi}) required to equilibrate a system grows faster than the corresponding equilibrium relaxation time, t^(eq)({\phi}) \approx 0.27 \times [{\tau}{\alpha} (k; {\phi})]^1.43, and that both characteristic times increase strongly as {\phi} approaches {\phi}^(a), thus suggesting that the measurement of equilibrium properties at and above {\phi}(a) is experimentally impossible