1,355,485 research outputs found
Mrs. Andreas Papandreou [Margaret Papandreou, née Chant]
No full textImage (portrait orientation) of Mrs. Papandreou being interviewed by Diane Stratas at Founders College residence, York University. [She is seated and holding a cigarette
Greek Everyman: Andreas Papandreou at 100
No full text© The Author 2019. The Political Quarterly © The Political Quarterly Publishing Co. Ltd. 2019 Published by John Wiley & Sons Ltd 2019 marks 100 years since the birth of Andreas Papandreou, Greece's first socialist prime minister and an extraordinary figure of twentieth century European politics. Looking back, the central purpose of this article is to answer pivotal questions about Papandreou and his career. What have been the major turning points in his life? What were his main beliefs? What motivated him and his politics? What were his political priorities and methods? What did he want to achieve as prime minister? Why did he become so involved in foreign policy issues? What were his assets as prime minister? Did they outweigh his shortcomings as a politician and leader? Did power change him and how? What will be Papandreou's place in history?.Published versio
A shear wave ground surface vibration technique for the detection of buried pipes
No full textA major UK initiative, entitled ‘Mapping the Underworld’ aims to develop and prove the efficacy of a multi-sensor device for accurate remote buried utility service detection, location and, where possible, identification. One of the technologies to be incorporated in the device is low-frequency vibro-acoustics; the application of this technology for detecting buried infrastructure, in particular pipes, is currently being investigated. Here, a shear wave ground vibration technique for detecting buried pipes is described. For this technique, shear waves are generated at the ground surface, and the resulting ground surface vibrations measured. Time-extended signals are employed to generate the illuminating wave. Generalized cross-correlation functions between the measured ground velocities and a reference measurement adjacent to the excitation are calculated and summed using a stacking method to generate a cross-sectional image of the ground. To mitigate the effects of other potential sources of vibration in the vicinity, the excitation signal can be used as an additional reference when calculating the cross-correlation functions. Measurements have been made at two live test sites to detect a range of buried pipes. Successful detection of the pipes was achieved, with the use of the additional reference signal proving beneficial in the noisier of the two environments
On the detection of shallow objects using seismic wave reflections
No full textThis thesis is concerned with a methodology for the detection of shallow (of order 1 metre) objects buried in soil using seismic waves. Possible objects of interest include infrastructure, archaeological artefacts and ordinance. A mathematical analysis of an idealised system is performed to gain understanding of both seismic wave propagation and the generation of these waves by surface sources. The mathematical techniques used in the existing analysis of a point vertical source are applied to the desired problem of a point horizontal surface traction. Results are displayed in a graphically concise form. An experimental methodology, capable of forming two-dimensional images through the ground, is described. The use of shear waves is shown preferable. The advantages and implementation of using time extended, rather than impulsive, excitation signals are described. Additional signal processing techniques, such as generalised cross-correlation functions, are also detailed. Simple numerical simulations are undertaken with the aim of both validating the post-processing algorithms and evaluating its robustness against non-ideal conditions. Simulated time histories are created by defining signals in the frequency domain and then modifying their amplitude and phase to replicate attenuation and propagation. Non-ideal conditions focus mainly on variation in the wavespeed as a function of depth. Simulations indicate that the imaging method fails for sufficiently large variations of wavespeed, particularly for objects buried below significant discontinuities in material properties. As shear waves are used for the imaging method, a source was designed and constructed to preferentially generate shear waves and was verified using field experimentation. The imaging methodology is applied to data from three experimental sites and is able to detect the target objects with some success. Problems, however, remain with the measurement of a wavespeed that is consistent and indicative of the propagation speed at depth, and in consistently obtaining a sufficiently large reflected wave from the object
"Vasso Papandreou" in Dicionário As Mulheres e a Unidade Europeias
No full textVasso Papandreou nasceu na Grécia, em 31 de julho de 1944, e é uma das
incontornáveis mulheres gregas e dirigentes europeias. Foi a primeira mulher a ocupar
o posto de comissária na Comunidade Económica Europeia. Ocupou uma das
mais importantes pastas da Comissão Europeia da época, a pasta do Emprego,
Relações Industriais e Assuntos Sociais, na segunda Comissão Delors.Assembleia da República Portuguesa e Presidência da República Portuguesa
How crude oil prices shape the global division of labor
No full textOur work sheds new light on the role of oil prices in shaping the world economy by investigating flows of goods and services through global value chains between 1960 and 2011, by means of Markov Chain and network analysis. We show that over that time period the international division of labor and trade patterns are tightly linked to the price of oil. We observe a remarkably high negative correlation (−0.85) between the oil price and the share of cyclical value, i.e. the share of value embodied in raw materials and intermediate products that are conserved across direct and indirect relationships. We demonstrate that this correlation does not depend on the balance of payments nor on the nominal value of trade or trade agreements; it is instead linked to the way Global Value Chains (GVCs) shape global trade. The cycling indexes show two majors structural breaks in terms of distance and length of GVCs, hinting at two phases of the recent globalization dynamics, sustained by two major transport modes. Our study suggests that transport played an important structural role in shaping GVCs, unveiling the deep, long-term impact of energy costs on the structure and connectivity of the global economy. In more theoretical term, our results indicate that the production structure could be approached as an energy system, forged by the efficiency in the transport sector. Understanding the role of oil in a globalized economy is of paramount importance for decoupling of economic growth from energy growth and transitioning toward a de-carbonized economy
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
On the detection objects buried at a shallow depth using seismic wave reflections
No full textThis paper concerns the detection of shallow (of the order 1 m) buried objects using seismic excitation. Time-extended signals are used to generate a compressional wave using a shaker attached to the ground. The wave propagates through the ground, reflects off a buried object and is captured by an array of geophones on the surface. The envelopes of the cross-correlation functions between the measured ground velocities and the excitation signal are calculated and summed to generate a cross-sectional image of the ground. The wide cross-correlation peaks caused by high ground attenuation are partially compensated for by using the generalized cross-correlation function called the phase transform. Simple simulations are conducted to demonstrate the method, and some field experiments have been carried out aimed at the detection of a buried concrete pipe. In the experiments the pipe could be detected using the method proposed, with experimental and simulated data producing good agreement
Damaskinos Papandreou, Wolfgang A. Bienert et Knut Schäferdiek (éd.), Œcumenica et patristica. Festschrift für Wilhelm Schneemelcher zum 75. Geburtstag. 1989
No full textDe Halleux André. Damaskinos Papandreou, Wolfgang A. Bienert et Knut Schäferdiek (éd.), Œcumenica et patristica. Festschrift für Wilhelm Schneemelcher zum 75. Geburtstag. 1989. In: Revue théologique de Louvain, 23ᵉ année, fasc. 2, 1992. pp. 204-208
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