Technological Educational Institute of Crete

About: Technological Educational Institute of Crete is a education organization based out in Heraklion, Greece. It is known for research contribution in the topics: Cloud computing & Laser. The organization has 742 authors who have published 1537 publications receiving 32794 citations.

Urban Residents’ Attitudes toward Tourism Development: The Case of Crete

Abstract: This article focuses on the identification and explanation of the attitudes of a sample of urban residents toward tourism development on Crete and their grouping with respect to these attitudes. Urban residents of Crete are quite strong in their support for tourism. However, the residents are not homogenous in their perceptions of tourism development. Education and employment in tourism were found to be the major single factors affecting the attitudes of residents of the island. A segmentation procedure based on attitude statements produced three clusters: the Advocates (identified by their high appreciation of tourism benefits), the Socially and Environmentally Concerned (characterized by a consensus toward the environmental and social costs from tourism expansion), and the Economic Skeptics (who showed lower appreciation of tourism’s economic benefits). The findings of the study are discussed with reference to the social exchange and the social representations theories and the conclusions of the study a...

High harmonic generation in the relativistic limit

Abstract: The generation of extremely bright coherent X-ray pulses in the femtosecond and attosecond regime is currently one of the most exciting frontiers of physics–allowing, for the first time, measurements with unprecedented temporal resolution1,2,3,4,5,6. Harmonics from laser–solid target interactions have been identified as a means of achieving fields as high as the Schwinger limit2,7 (E=1.3×1016 V m−1) and as a highly promising route to high-efficiency attosecond (10−18 s) pulses8 owing to their intrinsically phase-locked nature. The key steps to attain these goals are achieving high conversion efficiencies and a slow decay of harmonic efficiency to high orders by driving harmonic production to the relativistic limit1. Here we present the first experimental demonstration of high harmonic generation in the relativistic limit, obtained on the Vulcan Petawatt laser9. High conversion efficiencies (η>10−6 per harmonic) and bright emission (>1022 photons s−1 mm−2 mrad−2 (0.1% bandwidth)) are observed at wavelengths <4 nm (the `water-window' region of particular interest for bio-microscopy).