A DHCP-based IP address autoconfiguration for MANETs

Mobile Ad hoc Networks (MANETs) are expected to become more and more important in the upcoming years, playing a significant role in 4G networks. In order to enable the deployment of IP services in such networks, IP address autoconfiguration mechanisms are required. Although the ad hoc topic has been a very intense research area, with a plethora of published papers about routing, there is a lack of proposals of address autoconfiguration with enough support from the technical community. This paper presents a mechanism suited for MANETs connected to the Internet, reusing existing and widely deployed address autoconfiguration protocols, such as DHCPv6 and Router Advertisements

Redes de distribución y centros de transformación para una urbanización de viviendas

Este proyecto tiene por objeto definir las características técnicas y de seguridad del suministro eléctrico de las diferentes parcelas que componen el polígono industrial, así como justificar y valorar los materiales empleados en el mismo, y obtener las autorizaciones pertinentes por parte de los organismos competentes, especialmente el Excmo. Ayuntamiento de Blanca, Consejería de Industria de la Región de Murcia y la Compañía suministradora de energía eléctrica “Iberdrola, S.A.”.Escuela Técnica Superior de Ingeniería IndustrialUniversidad Politécnica de Cartagen

Method of measuring the water jet diameter : Método de medida del chorro de agua

Abrasive Water Jet (AWJ) machining is one of the manufacturing technologies with highest market growth. It is a process in which material is removed from a work piece using mineral abrasive particles. Due to this principle, AWJ machining technology produces significant amount of waste products that consists mainly on the mineral abrasive. It is possible to cut softer materials with pure water jet (WJ), but efficiency is then reduced. In order to increase the efficiency of the WJ machining and to make the process more sustainable than AWJ, the Ice Jet (IJ) technology was developed. The IJ technology aims to supplement the currently used AWJ technology in several applications. Unfortunately addition of liquid nitrogen to a high-speed water jet can cause dispersion of the jet and consequently reduction of cutting efficiency. Previous experiments in the field of jet diameter measurement have been done by different research groups. In this thesis these methods and the results from the studies based on them, were described and analyzed. This state of the art analysis gave us the knowledge to begin the research on our new method. It also showed that due to possible implementation in industry applications, a quick, easy and affordable technique would be useful. For this reason the phenomenological analysis method to measure the diameter of the water jet was explored. The new method combines digital image acquisition and processing with digital manipulation of the photography. The main advantages of such method are that the equipment can be cheap and as the method is contactless, it doesn‟t get destroyed over time. The analysis of the jet can be automatized and the time of the analysis is short. This means that the method could be applied in the production line to measure the wear of the nozzles during the production cycle without causing any delays. This would increase the lifetime of the nozzles, decreasing the production costs and through online modification of the process parameters also its quality. During the experiments several process parameters such as water pressure, water temperature and diameter of the water nozzle were modified. In order to verify of the new measurement method, the results were compared with results from another method that has already been established before. Therefore the results from gained from this method served as the reference used to evaluate the new method. The reference method measures the jet diameter through the measurement of the jet force. The experimental setup was built in order to evaluate new measurement method and to compare the novel photographic method with the method which makes use of the load cell to measure the WJ diameter. Setup was built on the machine for ice jet experiments. To illuminate the jet, two high performance light emitting diodes (LED) were used and a consumer digital single lens reflex (DSLR) camera was used to capture the images. In order to make the image acquisition as constant as possible a microcontroller was used to control the LEDs and to trigger the DSLR. Simultaneously a measurement set of WJ force has been made with the load cell. The focus of this work has been on the photographic method. Measurements with load cell were used for validation of the novel method only. During the experiments two water nozzles were used, five different standoff distances, three different water pressures and three different water temperatures. Regarding photography two different shutter speeds were used throughout all the experiments. Preliminary several combinations of shutter speed and light intensity has been tested in order to obtain optimal experimental conditions. Evaluation of results was performed in the Matlab software package. More than one thousand images were processed by fitting a custom function to the specific rows of image. Function was Gaussian with additional quadratic, linear and constant term. Function was fitted to five image rows which correspond to five different standoff distances from the water nozzle. At the precisely same distances also radial dependence of WJ force was measured. It was found, that the method using digital camera and computer evaluation of image can yield good results which are in good correspondence with measurements of WJ diameter obtained by the load cell.Escuela Técnica Superior de Ingeniería IndustrialUniversidad Politécnica de Cartagen

Nos gusta correr

Audiovisuales. Entrevista a Araceli Sanchis y Laura Fajardo, miembros de UC3Marathon . Disponible en https://www.youtube.com/watch?v=6l8iVbDPe8M .La Universidad organiza cada curso actividades y cursos deportivos, entre ellos: el atletismo en todas sus variantes. Para conocer mejor cómo se desenvuelven estas actividades, i-3 ha hablado con tres miembros de la asociación para conocer sus experiencias, qué hacen y por qué corren.Contiene: Nos husta correr (p.28-29) .-- UC3Marathon. Impulsar el atletismo (p.30) .-- Entrevista a Araceli Sanchis y Laura Fajardo .-- Crecer como atleta y como persona / Carlos Jesús Bernardos (p.31)

Desigualdad en la distribución de la renta y crecimiento econòmico

Màster Oficial d'Internacionalització, Facultat d'Economia i Empresa, Universitat de Barcelona, Curs: 2013-2014, Tutor: Juan Tugores QuesEl estudio de la desigualdad en la distribución de la renta ha estado presente desde el principio del pensamiento económico clásico. En un primer momento se estudió la evolución de la distribución funcional de la renta, es decir, la distribución de la renta por sectores de actividad, pudiendo provenir dicha renta del capital o del trabajo. Preocupaba la incidencia que ello podría tener en el crecimiento económico. David Ricardo y más adelante Karl Marx teorizaban sobre una dinámica de acumulación de las rentas de la tierra y el capital respectivamente por aquellos que lo controlaban (terratenientes y capitalistas), no observando ningún sistema de reequilibrio en el capitalismo en dicha dinámica, a la par, que las ganancias de la renta o el capital disminuirían con el tiempo (debido a la Ley de los rendimientos decrecientes en el caso de Ricardo, y a un incremento del valor del capital en Marx, que exige cada vez de mayor inversión), y por lo tanto, acrecentaría la polarización de los ingresos. Dicha dinámica tendría consecuencias económicas, asfixiando la inversión a largo plazo y teniendo un crecimiento bajo o nulo, o en el caso de Marx consecuencias políticas, llevando a la revolución social..

IPv6 Network Mobility

Network Authentication, Authorization, and Accounting has been used since before the days of the Internet as we know it today. Authentication asks the question, “Who or what are you?” Authorization asks, “What are you allowed to do?” And fi nally, accounting wants to know, “What did you do?” These fundamental security building blocks are being used in expanded ways today. The fi rst part of this two-part series focused on the overall concepts of AAA, the elements involved in AAA communications, and highlevel approaches to achieving specifi c AAA goals. It was published in IPJ Volume 10, No. 1[0]. This second part of the series discusses the protocols involved, specifi c applications of AAA, and considerations for the future of AAA

Scalable QoS-aware Mobility for Future Mobile Operators

Telecom operators and Internet service providers are heading for a new shift in communications paradigms. The forthcoming convergence of cellular and wireless data networks is often manifested in an “all IP approach” in which all communications are based on an end-to-end IP protocol framework. The approach to network design becomes user and service-centered, so that continuous reachability of mobile users and sustained communication capabilities are default requirements for a prospective architecture. In this article, we describe a network architecture which is able to provide seamless communication mobility, triggered either by the user or by the network, across multiple technologies. The architecture allows for media independent handovers and supports optimized mobility and resource management functions. The main focus of the article is on major technical highlights of mobility and quality-of-service (QoS) management subsystems for converged networks.Publicad

Securing route optimisation in NEMO

Third International Symposium on Modeling and Optimization in Mobile, Ad Hoc,and Wireless Networks. 4-6 April 2005. Riva del Garda, Trentino, ItalyThe network mobility (NEMO) basic support protocol enables mobile networks to change their point of attachment to the Internet, while preserving established sessions of the nodes within the mobile network. When only a nonnested mobile network is considered, the so-called triangle routing is the main problem that should be faced. In mobile IPv6, the route optimisation mechanism solves this problem, and the return routability mechanism aims to limit the security concerns originated because of the route optimisation. Nowadays return routability is considered a weak solution (i.e., based on strong assumptions). In this article we explore different approaches to route optimisation in NEMO and we devise how to adapt some of the terminal mobility solutions to a NEMO environment, where, as we propose, a delegation of signalling rights from the mobile network node to the mobile router is necessary.Publicad