Suchergebnisse

The ongoing political conflict between Israel and the Palestinian territories results in an increasing physical separation and societal alienation of both conflicting parties. In some contexts such as trade ongoing cooperation exists. We provide a micro-level analysis of economic interactions between Israeli and Palestinian wholesale traders of fruits and vegetables. We use a unique dataset gathered by a quantitative survey among Israeli wholesale traders in order to obtain evidence on their perspectives on this economic exchange. Trading patterns show vivid economic exchange of mainly informal character. Logistic regressions suggest that education and the personal social network play vital roles for the existence of Israeli-Palestinian trading relationships. Israeli traders feel not affected by the conflict but wish for its quick settlement. A low level of transaction problems is reported. They are mainly caused by the political and security situation and by the payment behavior of the Palestinian trading partners. Daily contacts of economic agents lead to continuous economic cooperation despite of ongoing political conflict and improve the perception of the actors of the other party.

International audience ; Bent inlet configurations find their application within the field of civil and military aviation as well as in stationary gas turbines. The distorted flow in such ducts can have a major influence on the performance, stability, and durability of the gas turbine. Both experimental and numerical approaches are generally applied during the design and optimization of inlet systems. The last decade high fidelity numerical simulations became very popular in this field of research, however, experimental investigations are essential for the calibration, validation, and optimization of numerical simulations. Experimental data is moreover necessary to assess the influence of combined pressure-swirl distortions on the performance of the entire propulsion system. The Institute of Jet Propulsion made major efforts to integrate a highly complex inlet duct in a test setup with the state-of-the-art MexJET turbofan engine. This setup enables the assessment of combined pressure-swirl distortion and its influence on the engine and makes investigations on inlet-compressor interactions possible. This paper describes the six main project phases, which include the definition, design, development, and integration of this highly bent inlet system at the engine test bed of the Institute of Jet Propulsion.