OPEX: (Olympus Propagation EXperiment)

The Olympus-1 satellite carries four distinct payloads for experimental utilization and research in the field of satellite communications: (1) the Direct Broadcasting Service (DBS) payload; (2) the Specialized Services Payload; (3) the 20/30 GHz Advanced Communications Payload; and (4) the Propagation Payload. Experimental utilization of the first three payloads involves ground transmissions to the satellite and hence sharing of available satellite time among experimenters. This is coordinated through the Olympus Utilization Program

Roots and earthworms under grass, clover and a grass-clover mixture

White clover has a lower root biomass and a higher abundance of earthworms than grass. This might have an impact on the ecosystem services soil structure maintenance and water regulation when white clover is introduced in a grass-clover mixture. We investigated the root biomass, the abundance of earthworms and a selection of soil physical parameters in white clover, grass-clover, and grass with and without inorganic N fertilizer. The treatment with clover-only had a lower root biomass, a lower C/N-ratio of the roots, a higher abundance of earthworms, a higher number of earthworm burrows, a lower penetration resistance at the 20-30 cm soil layer and a lower proportion of crumbs in the soil, than the other treatments. This confirms the literature that pure clover stimulates the ecosystem services of water regulation, but is less conducive to soil structure maintenance. However, the grass-clover mixture did not differ significantly from the grass treatments, but differed from pure clover in a higher percentage of soil crumbs. We infer that, when clover is introduced in grassland to reduce the reliance on inorganic fertilizer, the mixture of grass and clover maintains the positive impact of grass roots on soil structure but only may show a positive effect of clover - only on water regulation with a higher clover percentage in the dry matter than in our experiment

Longitudinal and Transverse Form Factors from 12^{12}C

Electron scattering form factors from $^{12}$C have been studied in the framework of the particle-hole shell model. Higher configurations are taken into account by allowing particle-hole excitations from the 1$s$ and 1$p$ shells core orbits up to the 1$f-2p$ shell. The inclusion of the higher configurations modifies the form factors markedly and describes the experimental data very well in all momentum transfer regions.Comment: 5 pages, 5 figures, 3 tables, late

Bodemleven koesteren loont

Het bodemleven is cruciaal voor de voedselproductie, reiniging van grond en afvlakking van de gevolgen van klimaatverandering. Maar de meeste mensen kennen het belang van de bodem niet, ook onderzoekers hebben nog veel vragen over de invloed van bodemorganismen. Ze proberen te achterhalen wat de bijdrage is aan een gezonde bodem

COST TIST - European Research Cooperation in Telecommunications and Information Science and Technology

In 1971, the Ministerial Conference of the European Union opened for 19 European countries the possibility of cooperation in the field of scientific and technical research, by formally establishing the framework of COST (Cooperation Scientifique et Technique).COST-TIST covers all COST activities in the field of telecommunications and information science and technology, from fundamental research to services and applications. TIST Actions have successfully contributed to the aims of the European Research Area by bringing a large set of national, industrial, and university research in the field together into a common framework of research objective

Biodiversiteit in de landbouw

De landbouw levert tal van ' ecosysteemdiensten' . Sommige, zoals natuurlijke onderdrukking van ziekten, komen direct aan de landbouw ten goede, andere zoals vastlegging van koolstof zijn voor de samenleving als geheel van belang. In het stimuleringsprogramma Biodiversiteit (SPB) is de algemene hypothese dat biodiversiteit en ecosysteemdiensten met elkaar geassocieerd zijn, onderzoch

Isospin-projected nuclear level densities by the shell model Monte Carlo method

We have developed an efficient isospin projection method in the shell model Monte Carlo approach for isospin-conserving Hamiltonians. For isoscalar observables this projection method has the advantage of being exact sample by sample. The isospin projection method allows us to take into account the proper isospin dependence of the nuclear interaction, thus avoiding a sign problem that such an interaction introduces in unprojected calculations. We apply our method in the calculation of the isospin dependence of level densities in the complete $pf+g_{9/2}$ shell. We find that isospin-dependent corrections to the total level density are particularly important for $N \sim Z$ nuclei.Comment: 5 pages including 4 figure