Model reference control of distributed parameter systems: Application to the SCOLE problem

The model reference control of lumped linear systems and the model reference control of the distributed parameter system (DPS) are presented with their theory and Spacecraft Control Laboratory Experiment (SCOLE) applications

Solar Neutron Events of October-November 2003

During the period when the Sun was intensely active on October-November 2003, two remarkable solar neutron events were observed by the ground-based neutron monitors. On October 28, 2003, in association with an X17.2 large flare, solar neutrons were detected with high statistical significance (6.4 sigma) by the neutron monitor at Tsumeb, Namibia. On November 4, 2003, in association with an X28 class flare, relativistic solar neutrons were observed by the neutron monitors at Haleakala in Hawaii and Mexico City, and by the solar neutron telescope at Mauna Kea in Hawaii simultaneously. Clear excesses were observed at the same time by these detectors, with the significance calculated as 7.5 sigma for Haleakala, and 5.2 sigma for Mexico City. The detector onboard the INTEGRAL satellite observed a high flux of hard X-rays and gamma-rays at the same time in these events. By using the time profiles of the gamma-ray lines, we can explain the time profile of the neutron monitor. It appears that neutrons were produced at the same time as the gamma-ray emission.Comment: 35 pages, 21 figures, accepted for publication in Ap

Data for: Components of Effort for Repeated Tasks

Eye tracking data for paper: Components of Attentional Effort for Repeated TasksTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

The influence of water-holding layer on the water supply of potatoes in loam-sandy soils of Oman

The paper is devoted to the analysis and evaluation of peculiar features of the water regime in loam-sandy soils of Oman. The total water volume taken up by potatoes has been determined in different modes of pre-irrigation soil moisture (70, 80% of MWC and 70-80-70% of MWC) and in dependence on the water-holding layer consisting of natural materials. It is shown that the most favorable conditions for water supply of potatoes, taking into account the economical use of irrigation water, can be created by differentiation of pre-irrigation soil moisture in inter-phase periods at a level of 70-80-70% of minimum water capacity (MWC). At the same time, sapropel should be used as a water-holding layer, which increases the potatoes yield at least by 10%

Modelling of gate-induced spin precession in a striped channel high electron mobility transistor

International audienc

Comparison of low-cost two-equation turbulence models for prediction flow dynamics in twin-jets devices

Publicación ISIThe flow field of a turbulent twin plane jet impinging normally onto a flat surface was investigated numerically for two configurations: a non-recirculating double jet at Re= 14,000 and a partially recirculated double jet at both Re= 6,000 and 14,000. Simulations were performed by using the k-epsilon Standard, the k-epsilon Realizable and the k-omega Standard models. The computed mean velocity and turbulent kinetic energy fields were compared with experimental data. The k-e Standard and k-epsilon Realizable models exhibit the best agreement with the experimental data, while the standard k-omega model gives more inadequate results for the investigated configurations. However, the three models underestimate the jet expansion rate. None of them correctly predicts the flow in the impact region. Inaccuracies are, however, acceptable considering the targeted engineering applications. (C) 2007 Elsevier Ltd. All rights reserved