Disseny i implementaci�� d'un editor col��laboratiu de LaTeX v��a web

Aquesta aplicaci�� permet la creaci�� i edici�� de documents LaTeX mitjan��ant la web, per part d'un equip de persones que poden treballar sobre el document concurrentment, sempre i quan treballin sobre seccions diferents, ja que el sistema que controla e impossibilita l'opci�� d'incoher��ncies es basa en bloquejos de les seccions sobre les quals es treballa. Pel desenvolupament d'aquesta aplicaci�� web s'han ajuntat v��ries tecnologies en pr��ctica en l'actualitat; com s��n, per exemple, JSP, Struts, AJAX- que al seu torn no ��s una tecnologia, sin�� un aglomerat de v��ries d'elles-, Javascript i servlets Java.

Plantillas para la creaci��n de material docente accesible con herramientas ofim��ticas y LaTex

Existen distintos tipos de dificultades de accesibilidad entre los alumnos que cursan sus estudios en nuestras facultades. Podemos encontrar por ejemplo algunos alumnos ciegos o con diferentes grados de baja visi��n, incluyendo los problemas debidos a la edad (presbicia o vista cansada), tambi��n alumnos con trastornos de aprendizaje como dislexia o TDAH o alumnos que sufren dificultades de acceso derivadas de los dispositivos que usan para la conexi��n (con pantallas muy peque��as). La accesibilidad, como disciplina, pretende mejorar las condiciones de acceso a la informaci��n de todos ellos.El proyecto ���Recursos docentes accesibles��� (2010-2012), en el marco del Programa de Mejora e Innovaci��n Docente de la Universidad de Barcelona, se centra en la baja visi��n y en la dislexia. El objetivo principal es crear y poner a disposici��n de todo el profesorado y de los responsables acad��micos de las titulaciones de la Universidad de Barcelona un conjunto de plantillas y modelos de documentos docentes accesibles en origen y f��cilmente transformables a versiones ampliadas o mejoradas. El proyecto se desarrolla en la Facultad de Biblioteconom��a y Documentaci��n y la Facultad de Matem��ticas y ha contado con la colaboraci��n de numerosos docentes. La previsi��n es extender este proyecto a otras universidades con la esperanza que, entre todos, podamos mejorar los problemas de accesibilidad de los documentos docentes.

A semi-grand canonical Monte Carlo simulation model for ion binding to ionizable surfaces: proton binding of carboxylated latex particles as a case study

In this paper, we present a computer simulation study of the ion binding process at an ionizable surface using a semi-grand canonical Monte Carlo method that models the surface as a discrete distribution of charged and neutral functional groups in equilibrium with explicit ions modelled in the context of the primitive model. The parameters of the simulation model were tuned and checked by comparison with experimental titrations of carboxylated latex particles in the presence of different ionic strengths of monovalent ions. The titration of these particles was analysed by calculating the degree of dissociation of the latex functional groups vs. pH curves at different background salt concentrations. As the charge of the titrated surface changes during the simulation, a procedure to keep the electroneutrality of the system is required. Here, two approaches are used with the choice depending on the ion selected to maintain electroneutrality: counterion or coion procedures. We compare and discuss the difference between the procedures. The simulations also provided a microscopic description of the electrostatic double layer (EDL) structure as a function of p H and ionic strength. The results allow us to quantify the effect of the size of the background salt ions and of the surface functional groups on the degree of dissociation. The non-homogeneous structure of the EDL was revealed by plotting the counterion density profiles around charged and neutral surface functional groups.

A semi-grand canonical Monte Carlo simulation model for ion binding to ionizable surfaces: Proton binding of carboxylated latex particles as a case study

In this paper, we present a computer simulation study of the ion binding process at an ionizable surface using a semi-grand canonical Monte Carlo method that models the surface as a discrete distribution of charged and neutral functional groups in equilibrium with explicit ions modelled in the context of the primitive model. The parameters of the simulation model were tuned and checked by comparison with experimental titrations of carboxylated latex particles in the presence of different ionic strengths of monovalent ions. The titration of these particles was analysed by calculating the degree of dissociation of the latex functional groups vs. pH curves at different background salt concentrations. As the charge of the titrated surface changes during the simulation, a procedure to keep the electroneutrality of the system is required. Here, two approaches are used with the choice depending on the ion selected to maintain electroneutrality: counterion or coion procedures. We compare and discuss the difference between the procedures. The simulations also provided a microscopic description of the electrostatic double layer (EDL) structure as a function of pH and ionic strength. The results allow us to quantify the effect of the size of the background salt ions and of the surface functional groups on the degree of dissociation. The non-homogeneous structure of the EDL was revealed by plotting the counterion density profiles around charged and neutral surface functional groups. �� 2011 American Institute of Physics.

Econometrics

This is a project to develop a document for teaching graduate econometrics that is "open source", specifically, licensed as GNU GPL. That is, anyone can access the document in editable form, and can modify it, as long as they make their modifications available. This allows for personalization, as well as a simple way to make contributions and error corrections. The hope is that people preparing to teach econometrics for the first time might find it useful, and eventually be motivated to contribute back to the project. The central document is something between a set of lecture notes and a text book. It's not as terse as lecture notes, but not as complete or well-referenced as a text book. Of course, the document is constantly evolving, and you are welcome to modify it as you like. The document contains (at least when viewed in HTML or PDF form) hyperlinks to example programs written using the GNU/Octave language. The document itself is written using the LyX word processor. LyX documents can be exported as LaTeX, so the system is quite portable.

OpenJade development: implementaci��n y formateo del modelo de p��ginas

Este proyecto trata de a��adir nuevas funcionalidades a la herramienta OpenJade, la cual es el ��nico procesador de hojas de estilo DSSSL para documentos SGML, en la comunidad de OpenSource. En concreto se intenta insertar los modelos de p��ginas para una secuencia de p��ginas complejas, y a partir de aqu�� crear un backend en Latex/TeX. Esto supondr��a un gran salto en la creaci��n de documentos SGML ya que permitir��a crear diferentes regiones en una misma p��gina. Se explica todo el procedimiento de implementaci��n, conceptos b��sicos a tener en cuenta y se muestra c��mo se consigue formar el ��rbol de objetos para poder crear el backend TeX. Finalmente, aunque se consigue construir el backend, donde se muestra que la construcci��n de la nueva funcionalidad es correcta, no es posible formar una backend en LaTeX sin limitaciones importantes, debido a que LaTeX no est�� preparado para este tipo de procesamiento autom��tico. Sin embargo se crean diferentes salidas que se fueron formando hasta llegar a la conclusi��n que se deb��a implementar una nueva macros en TeX para LaTeX que soportara el modelo de p��gina.

Estudi i desenvolupament d'un sistema automatitzat d'elaboraci�� d'exercicis estad��stics per a la plataforma Moodle

El projecte es basa en desenvolupar una soluci�� per a la integraci�� dins de la plataforma Moodle, d'un formulari que permeti sol��licitar, als usuaris registrats, exercicis dels indicadors estad��stics m��s comuns, i escollir-ne el nivell de dificultat. La creaci�� dels exercicis i la soluci�� dels mateixos, es dur�� a terme en el moment de la seva sol��licitud, a trav��s d'un procediment automatitzat que generar�� dades aleat��ries dins d'un rang determinat. El procediment automatitzat es realitzar�� mitjan��ant la funci�� "Sweave" del programari estad��stic R. Aquesta funci�� integra en un ��nic document els continguts de text del programari LaTeX amb els continguts estad��stics provinents de R.

Actualizaci��n gr��fica y funcional del proyecto Rodolfo

El proyecto Rodolfo es una herramienta online para ayudar en el proceso del aprendizaje de las matem��ticas. Consiste pues, en un repositorio de f��rmulas matem��ticas y sus correspondientes locuciones para poder escuchar c��mo se leen las mismas.

Generador de dossiers

La plataforma ACME (Avaluaci�� Continuada i Millora de l���Ensenyament) va ser creada l���any 1998 per un grup de professors del departament d���Inform��tica i Matem��tica Aplicada de la Universitat de Girona.L���ACME es va concebre com una plataforma d���e-learning, ��s a dir, un sistema que mitjan��ant l�����s d���Internet afavor��s l���aprenentatge, permeten la interactivitat entre alumne i professor sobre un temari com��.Actualment l���ACME s���utilitza com a complement a les classes presencials, on el professor exposa de manera magistral els conceptes i resol algun exercici a mode d���exemple, per tal que despr��s l���alumne, utilitzant la plataforma ACME, intenti resoldre els exercicis proposats pel professorL���objectiu d���aquest Projecte Final de Carrera ��s desenvolupar l���an��lisi, disseny i implementaci�� de les modificacions necess��ries a incorporar a la plataforma ACME per tal de generar documents PDF dels exercicis de l���ACME. El projecte consta de tres parts: Permetre que l���alumne sigui capa�� d���obtenir un fitxer en el qual hi hagin tots els exercicis de l���assignatura escollida, El professor tamb�� podr�� obtenir el dossier d���un alumne en concret, permetre que el professor pugui generar un dossier de problemes base a partir dels exercicis que hagi seleccionat del repositori i permetre que el professor pugui generar un conjunt de dossiers de problemes per a despr��s repartir entre els seus alumnes

Using the HEGY Procedure When Not All Roots Are Present

Empirical studies have shown little evidence to support the presence of all unit roots present in the $^{\Delta_4}$ filter in quarterly seasonal time series. This paper analyses the performance of the Hylleberg, Engle, Granger and Yoo (1990) (HEGY) procedure when the roots under the null are not all present. We exploit the Vector of Quarters representation and cointegration relationship between the quarters when factors $(1-L),(1+L),\bigg(1+L^2\bigg),\bigg(1-L^2\bigg) y \bigg(1+L+L^2+L^3\bigg)$ are a source of nonstationarity in a process in order to obtain the distribution of tests of the HEGY procedure when the underlying processes have a root at the zero, Nyquist frequency, two complex conjugates of frequency $^{\pi/2}$ and two combinations of the previous cases. We show both theoretically and through a Monte-Carlo analysis that the t-ratios $^{t_{{\hat\pi}_1}}$ and $^{t_{{\hat\pi}_2}}$ and the F-type tests used in the HEGY procedure have the same distribution as under the null of a seasonal random walk when the root(s) is/are present, although this is not the case for the t-ratio tests associated with unit roots at frequency $^{\pi/2}$.

Using the HEGY Procedure When Not All Roots Are Present

Empirical studies have shown little evidence to support the presence of all unit roots present in the $^{\Delta_4}$ filter in quarterly seasonal time series. This paper analyses the performance of the Hylleberg, Engle, Granger and Yoo (1990) (HEGY) procedure when the roots under the null are not all present. We exploit the Vector of Quarters representation and cointegration relationship between the quarters when factors $(1-L),(1+L),\bigg(1+L^2\bigg),\bigg(1-L^2\bigg) y \bigg(1+L+L^2+L^3\bigg)$ are a source of nonstationarity in a process in order to obtain the distribution of tests of the HEGY procedure when the underlying processes have a root at the zero, Nyquist frequency, two complex conjugates of frequency $^{\pi/2}$ and two combinations of the previous cases. We show both theoretically and through a Monte-Carlo analysis that the t-ratios $^{t_{{\hat\pi}_1}}$ and $^{t_{{\hat\pi}_2}}$ and the F-type tests used in the HEGY procedure have the same distribution as under the null of a seasonal random walk when the root(s) is/are present, although this is not the case for the t-ratio tests associated with unit roots at frequency $^{\pi/2}$.

Interactive Calculus in a Virtual Learning Environment

The teaching of higher level mathematics for technical students in a virtual learningenvironment poses some difficulties, but also opportunities, now specific to that virtuality.On the other hand, resources and ways to do now manly available in VLEs might soon extend to all kinds of environments.In this short presentation we will discuss anexperience carried at Universitat Oberta deCatalunya (UOC) involving (an on line university), first, the translation of LaTeX written existent materials to a web based format(specifically, a combination of XHTML andMathML), and then the integration of a symbolic calculator software (WIRIS) running as a Java applet embedded in the materials, intending to achieve an evolution from memorising concepts and repetitive algorithms to understanding and experiment concepts and the use of those algorithms.

Dise��o e implementaci��n de un juego paraplataforma Android : Jim Adventure

Creaci��n de un juego tipo runner para plataforma Android usando Unity3D e Inkscape.

Creando un videojuego educativo : Recycle

Desarrollo de un juego educativo que presenta elementos en pantalla que el usuario deber�� reconocer y clasificar correctamente seg��n los materiales con qu�� est�� hecho para su reciclaje.