Induced shock loads during the separation of the Ariane 5 VEB structure

Tests used to simulate the separation of the lower stage of the Ariane Vehicle Equipment Bay (VEB) were carried out on a flat full scale model. Theoretical studies carried out prior to testing are described. Three different mathematical methods, finite element, component element, and wave propagation, were used. Comparison of the predicted theoretical results with the actual test results is planned.

Concrete Meccanos: Precast Constructions after the Second World War in the Netherlands

Estudio de soluciones prefabricadas de hormigón no estandarizadas en los Países Bajos tras la Segunda Guerra Mundial.

On the simulation of the UPMSAT-2 microsatellite power

Simulation of satellite subsystems behaviour is extramely important in the design at early stages. The subsystems are normally simulated in the both ways : isolated and as part of more complex simulation that takes into account imputs from other subsystems (concurrent design). In the present work, a simple concurrent simulation of the power subsystem of a microsatellite, UPMSat-2, is described. The aim of the work is to obtain the performance profile of the system (battery charging level, power consumption by the payloads, power supply from solar panels....). Different situations such as battery critical low or high level, effects of high current charging due to the low temperature of solar panels after eclipse,DoD margins..., were analysed, and different safety strategies studied using the developed tool (simulator) to fulfil the mission requirements. Also, failure cases were analysed in order to study the robustness of the system. The mentioned simulator has been programed taking into account the power consumption performances (average and maximum consumptions per orbit/day) of small part of the subsystem (SELEX GALILEO SPVS modular generators built with Azur Space solar cells, SAFT VES16 6P4S Li-ion battery, SSBV magnetometers, TECNOBIT and DATSI/UPM On Board Data Handling -OBDH-...). The developed tool is then intended to be a modular simulator, with the chance of use any other components implementing some standard data.

Space structures for sports buildings: Tien T. Lan and Yuan Zhilian (eds). Elsevier Applied Science Publishers, The Netherlands, 1987

This book review states that parts of this interesting volume may prove useful as a reference for designers and researchers in the field, though it lacks somewhat in unity and various important topics are not covered.

Annual report of the secretary of the State Horticultural Society of Michigan.

1915

Annual report of the secretary of the State Horticultural Society of Michigan.

1889

Annual report of the secretary of the State Horticultural Society of Michigan.

1880

A history of the British zoophytes. By George Johnston.

2, Plates

A history of the British zoophytes. By George Johnston.

1, Text

Annual report of the secretary of the State Horticultural Society of Michigan.

1894

Annual report of the secretary of the State Horticultural Society of Michigan.

1882

Annual report of the secretary of the State Horticultural Society of Michigan.

1890

Multi-component assessment of chronic obstructive pulmonary disease : an evaluation of the ADO and DOSE indices and the global obstructive lung disease categories in international primary care data sets

Funding The International Primary Care Respiratory Group (IPCRG) provided funding for this research project as an UNLOCK group study for which the funding was obtained through an unrestricted grant by Novartis AG, Basel, Switzerland. The latter funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript. Database access for the OPCRD was provided by the Respiratory Effectiveness Group (REG) and Research in Real Life; the OPCRD statistical analysis was funded by REG. The Bocholtz Study was funded by PICASSO for COPD, an initiative of Boehringer Ingelheim, Pfizer and the Caphri Research Institute, Maastricht University, The Netherlands.