Criterios de selección CSIS - Final

Desarrollo empresarial y creación de empresa

Five-level current-source inverters with buck-boost and inductive-current balancing capabilities

This paper presents new five-level current-source inverters (CSIs) with voltage/current buck-boost capability, unlike existing five-level CSIs where only voltage-boost operation is supported. The proposed inverters attain self-inductive-current-balancing per switching cycle at their dc front ends without having to include additional balancing hardware or complex control manipulation. The inverters can conveniently be controlled by using the well-established phase-shifted carrier modulation scheme with only two additional linear references and a mapping logic table needed. Existing modulators can therefore be conveniently retrofitted for controlling the presented inverters. By appropriately coordinating the inverter gating signals, their implementations can be realized by using the least number of components without degrading performance. These enhanced features of the inverters have already been verified in simulation and experimentally using a scaled-down laboratory platform.

Evaluation of resonant damping techniques for Z-source current-type inverter

For the renewable energy sources whose outputs vary continuously, a Z-source current-type inverter has been proposed as a possible buck-boost alternative for grid-interfacing. With a unique X-shaped LC network connected between its dc power source and inverter topology, Z-source current-type inverter is however expected to suffer from compounded resonant complications in addition to those associated with its second-order output filter. To improve its damping performance, this paper proposes the careful integration of Posicast or three-step compensators before the inverter pulse-width modulator for damping triggered resonant oscillations. In total, two compensators are needed for wave-shaping the inverter boost factor and modulation ratio, and they can conveniently be implemented using first-in first-out stacks and embedded timers of modern digital signal processors widely used in motion control applications. Both techniques are found to damp resonance of ac filter well, but for cases of transiting from current-buck to boost state, three-step technique is less effective due to the sudden intermediate discharging interval introduced by its non-monotonic stepping (unlike the monotonic stepping of Posicast damping). These findings have been confirmed both in simulations and experiments using an implemented laboratory prototype.

Multiuser Scheduling for Cognitive MIMO with Channel Estimation Errors and Feedback Delay

A multiuser scheduling multiple-input multiple-output (MIMO) cognitive radio network (CRN) with space-time block coding (STBC) is considered in this paper, where one secondary base station (BS) communicates with one secondary user (SU) selected from K candidates. The joint impact of imperfect channel state information (CSI) in BS → SUs and BS → PU due to channel estimation errors and feedback delay on the outage performance is firstly investigated. We obtain the exact outage probability expressions for the considered network under the peak interference power IP at PU and maximum transmit power Pm at BS which cover perfect/imperfect CSI scenarios in BS → SUs and BS → PU. In addition, asymptotic expressions of outage probability in high SNR region are also derived from which we obtain several important insights into the system design. For example, only with perfect CSIs in BS → SUs, i.e., without channel estimation errors and feedback delay, the multiuser diversity can be exploited. Finally, simulation results confirm the correctness of our analysis.

ReedCob – An eco-efficient building technology for monolithic walls based on earth and reeds

4th Conference COST ACTION FP1303 – Designing with Bio-based Materials – Challenges and opportiunities. INIA – CSIC, Madrid, 24-25 February 2016. Book of abstracts, T.Troya, J.Galván, D.Jones (Eds.), INIA and IETcc – CSIS, pg. 79-80 (ISBN: 978-91-88349-16-3)

La marca país Argentina como herramienta cultural para el desarrollo económico

Argentina, uno de los países más visitados de América Latina deja al descubierto su marca país " Argentina Late con vos". Un mecanismo de política exterior con el cual el país ha obtenido grandes beneficios económicos.

Analisis de la politica exterior china para Africa Subsahariana en materia politica y energetica. Una aproximacion a la relacion sino sudanesa. Periodo 1996 - 2005

Este trabajo explica las razones por las cuales China se estrecha sus vinculos con Afirca. El tema principal es el inicio de la relacion sino-sudanesa y la evolucion de esta hasta el fin de la guerra civil en Sudan.

La Estrategia Nacional de Defensa de Brasil como respuesta al dilema de seguridad regional con Chile, Venezuela y Colombia (1998-2008)

El interés de esta monografía es analizar la influencia que la configuración de un dilema de seguridad en Suramérica entre Chile, Venezuela y Colombia durante el periodo 1998-2008, tuvo en la formulación de la Estrategia Nacional de Defensa de Brasil de 2008. Se analiza cómo el cambio en la estructura de poder regional y en la distribución relativa de capacidades producto de las acciones de estos actores, afectó la definición de los lineamientos y acciones estratégicas de la Estrategia Nacional de Defensa, en tanto Brasil buscaba consolidar su papel como potencia en Suramérica. Teniendo en cuenta el realismo defensivo como marco explicativo y su enfoque en temas asociados a la seguridad, se realiza un análisis que permita comprender la situación suramericana descrita y el alcance de la teoría como herramienta analítica.

Los intereses estratégicos de EEUU, Rusia, China y Japón como determinantes de la estrategia de mantenimiento de la Estructura en la Península Coreana. 2003-2013.

El propósito principal de esta monografía es ofrecer una perspectiva crítica sobre el conflicto latente en la Península Coreana, haciendo un acercamiento al mismo desde un marco teórico asentado en el realismo estructural de Kenneth Waltz. De este modo, se busca responder a cuestiones sobre los intereses estatales como fundamento básico de las estrategias de mantenimiento de la Estructura en regiones geopolíticamente sensibles. Al final, se llega a la conclusión afirmando que la Estructura ejerce una serie de funciones para garantizar su preservación mediante una acción de convergencia en la conducta de los Estados. Esta realidad ha mantenido a la Península Coreana sin un conflicto bélico en los últimos 50 años, muy a pesar de estar al borde del mismo en varias ocasiones, ya que de llegarse a presentar se rompería la estabilidad de la región, y por ende el Equilibrio de Poderes estaría en grave riesgo.

Down under and in between : Australian security perspectives in the 'Asian Century'

This chapter will provide an overview of Australian perspectives on the US alliance in light of ongoing and emerging challenges in the Asia-Pacific region. After a brief discussion of the motivations behind the signing of the ANZUS treaty, the first part of the chapter examines the historical context of the alliance, with a particular focus on the longstanding and ongoing tussle in Australia between independence in foreign policy making vis-à-vis broader structural constraints. While this debate has been a constant feature of the political scene in Australia, it has come into particular focus since the US withdrawal from Vietnam, which marked a turning point in Australian perspectives with regard to its own role in Asia. The collision of ideas surrounding Australian identity and Australian national interest has been reflected in policy approaches as successive governments have sought to strike a balance between the two exigencies and thus, most optimally ensure Australia’s strategic future. The chapter concludes by examining current perspectives through the lens of an ongoing debate taking place in Australian academic circles about what the rise of China means for Australia and its commitment to the US alliance, and considers options for caucus-style cooperation with fellow US allies beyond the hub-and-spokes model.

Global Threats, 2014

In this poll on global and national threats to security and safety, just over half (55%) of Canadians say they aren't confident in the ability of domestic security services to prevent homegrown radicals from carrying out terrorist attacks in Canada.

La Ciberseguridad como factor crítico en la Seguridad de la Unión Europea

El ciberespacio es un escenario de conflicto altamente complejo al estar en constante evolución. Ni la Unión Europea ni ningún otro actor del sistema internacional se encuentra a salvo de las amenazas procedentes del ciberespacio. Pero los pasos dados desde la UE en el mundo de la ciberseguridad no son en absoluto suficientes. Europa necesita que su Estrategia de ciberseguridad sea realmente capaz de integrar a las diferentes Estrategias nacionales. Es urgente una mayor determinación, unos mayores recursos y unos mejores instrumentos que permitan a la Unión implementar una gestión de crisis y una prevención de ciberconflictos verdaderamente eficaz.

Optimal Power Allocation for Multiuser Secure Communication in Cooperative Relaying Networks

We consider a cooperative relaying network in which a source communicates with a group of users in the presence of one eavesdropper. We assume that there are no source-user links and the group of users receive only retransmitted signal from the relay. Whereas, the eavesdropper receives both the original and retransmitted signals. Under these assumptions, we exploit the user selection technique to enhance the secure performance. We first find the optimal power allocation strategy when the source has the full channel state information (CSI) of all links. We then evaluate the security level through: i) ergodic secrecy rate and ii) secrecy outage probability when having only the statistical knowledge of CSIs.

A study of culture specific items and translation strategies in Bahram Beyza'i’s play “Marionettes”

L'objectif de cette recherche est de fournir une analyse de la pièce de théâtre perse ''Marionettes'' de Bahrām Beyzā'ī (1963) ainsi que de sa traduction anglaise (1989) afin de comparer et de mettre en contraste les traits propres à la culture «Culture-specific items» (CSI) et des stratégies de traduction. Les formes problématiques pertinentes des différences culturelles seront étudiées et les procédés suggérés par Newmark (1988) seront examinés afin de déterminer dans quelle mesure ils sont pertinents dans la traduction des différences culturelles du perse à l'anglais. La pièce a été traduite par une équipe de traducteurs: Sujata G.Bhatt, Jacquelin Hoats, Imran A. Nyazee et Kamiar K. Oskouee. (Parvin Loloi et Glyn Pursglove 2002:66). Les oeuvres théâtrales de Beyzā'ī sont basées sur les traditions ainsi que sur le folklore iranien. L'auteur aborde la réalité sous une perspective philosophique. « (Un point de vue) enveloppé dans une cape de comparaisons complexes à tel point que nombre des personnages de son oeuvre errent entre des symboles de la mythologie et de l’histoire, ou sociaux» (M.R. Ghanoonparvar, John Green 1989, p.xxii notre traduction). La classification des éléments culturels de Newmark (1988) va comme suit: «Écologie, culture matérielle, culture sociale, organisations, coutumes / moeurs, gestes et habitudes» (Newmark 1988:95). La recherche mettra l’accent sur les procédés suggérés pour traduire les CSI ainsi que sur les stratégies de traduction selon Newmark. Ces procédés comprennent : «traduction littérale, transfert, équivalent culturel, neutralisation, équivalent fonctionnel, équivalent descriptif, synonymie, par le biais de la traduction, transposition, modulation, traduction reconnue, étiquette de traduction, compensation, analyse componentielle, réduction et expansion, paraphraser, distique, notes, additions, gloses» (Newmark 1988:81-93). L'objectif ici est de déterminer si les procédés suggérés sont applicables à la traduction des CSIs du perse à l'anglais, et quels sont les procédés les plus fréquemment utilisés par les traducteurs.

SVPWM SWITCHING PATTERN FOR Z-SOURCE INVERTER, SIMULATION AND APPLICATION

The voltage source inverter (VSI) and current voltage source inverter (CSI) are widely used in industrial application. But the traditional VSIs and CSIs have one common problem: can’t boost or buck the voltage come from battery, which make them impossible to be used alone in Hybrid Electric Vehicle (HEV/EV) motor drive application, other issue is the traditional inverter need to add the dead-band time into the control sequence, but it will cause the output waveform distortion. This report presents an impedance source (Z-source network) topology to overcome these problems, it can use one stage instead of two stages (VSI or CSI + boost converter) to buck/boost the voltage come from battery in inverter system. Therefore, the Z-source topology hardware design can reduce switching element, entire system size and weight, minimize the system cost and increase the system efficiency. Also, a modified space vector pulse-width modulation (SVPWM) control method has been selected with the Z-source network together to achieve the best efficiency and lower total harmonic distortion (THD) at different modulation indexes. Finally, the Z-source inverter controlling will modulate under two control sequences: sinusoidal pulse width modulation (SPWM) and SVPWM, and their output voltage, ripple and THD will be compared.