5,769 research outputs found
Ecosystem services of biodiversity in organic grasslands
The use of multi-species mixtures in herbage production can add value in terms of improved conditions for pollinating insects, better resource utilization, carbon sequestration, yield stability, animal health and product quality. This is the hypothesis of a new project - EcoServe - where the goal is to design grasslands, which increase both the nature value and provide an economically sustainable food production
Search for associated Higgs boson production at DØ
Using 1 fb-1 of data the DO collaboration has searched for the production of a Higgs boson in association with a W or a Z boson. The W or Z boson is required to decay leptonically and whereas the Higgs boson decays into a bb pair. Searches in these final states are the most sensitive for a Higgs boson with a mass less than about 130 GeV/c2. No evidence for Higgs boson production has been observed and 95% C.L. upper limits on the Higgs boson production cross section are derived.http://deepblue.lib.umich.edu/bitstream/2027.42/64209/1/jpconf8_110_042029.pd
Biodiversitet i græsmarken - en fordel for både natur og fødevareproduktion
Anvendelse af mange-arts-blandinger i græsmarker til produktion kan øge nytteværdien, f.eks. i form af forbedrede vilkår for bestøvende insekter, øget ressourceudnyttelse, kulstoflagring, udbyttestabilitet, husdyrsundhed og produktkvalitet. Det er hypotesen i et nyt projekt, hvor målet er at designe græsmarker, som både øger naturværdien og giver en økonomisk bæredygtig fødevareproduktion
Mangfoldighed i den økologiske græsmark
Anvendelse af mange-arts-blandinger i græsmarker til produktion kan øge nytteværdien i form af forbedrede vilkår for bestøvende insekter, øget ressourceudnyttelse, kulstoflagring, udbyttestabilitet, husdyrsundhed og produktkvalitet. Det er hypotesen i et nyt projekt – EcoServe - hvor målet er at designe græsmarker, som både øger naturværdien og giver en økonomisk bæredygtig fødevareproduktion
Microwave Spectroscopy
Contains reports on two research projects.Joint Services Electronics Programs (U.S. Army, U. S. Navy, and U. S. Air Force) under Contract DAAB07-71-C-030
Magnetic Anisotropy of Isolated Cobalt Nanoplatelets
Motivated in part by experiments performed by M.H. Pan et al. (nanoletters,
v.5, p 83, 2005), we have undertaken a theoretical study of the the magnetic
properties of two-monolayer thick Co nanoplatelets with an equilateral
triangular shape. The analysis is carried out using a microscopic Slater-Koster
tight-binding model with atomic exchange and spin-orbit interactions designed
to realistically capture the salient magnetic features of large nanoclusters
containing up to 350 atoms. Two different truncations of the FCC lattice are
studied, in which the nanoplatelet surface is aligned parallel to the FCC (111)
and (001)crystal planes respectively. We find that the higher coordination
number in the (111) truncated crystal is more likely to reproduce the
perpendicular easy direction found in experiment. Qualitatively, the most
important parameter governing the anisotropy of the model is found to be the
value of the intra-atomic exchange integral J. If we set the value of J near
the bulk value in order to reproduce the experimentally observed magnitude of
the magnetic moments, we find both quasi-easy-planes and perpendicular easy
directions. At larger values of J we find that the easy-axis of magnetization
is perpendicular to the surface, and the value of the magnetic anisotropy
energy per atom is larger. The possible role of hybridization with substrate
surface states in the experimental systems is discussed.Comment: 15 pages, 13 figure
Microwave Spectroscopy
Contains reports on two research projects.Lincoln Laboratory, Purchase Order DDL B-00368U. S. ArmyU. S. NavyU. S. Air Force under Air Force Contract AF19(604)-740
- …