11 research outputs found
Controlling the ring curvature, solution assembly, and reactivity of gigantic molybdenum blue wheels
We describe the synthesis, structure, self-assembly, solution chemistry, and mass spectrometry of two new gigantic decameric molybdenum blue wheels, {Mo200Ce12} (1) and {Mo100Ce6} (2), by building block rearrangement of the tetradecameric {Mo154} framework archetype and control of the architectureâs curvature in solution from the addition of Ce(III). The assembly of 1 and 2 could be directed accordingly by adjusting the ionic strength and acidity of the reaction mixture. Alternatively, the dimeric cluster {Mo200Ce12} could be transformed directly to the monomeric species {Mo100Ce6} upon addition of a potassium salt. ESI-ion mobility mass spectra were successfully obtained for both {Mo200Ce12} and {Mo100Ce6}, which is the first report in molybdenum blue chemistry thereby confirming that the gigantic clusters are stable in solution and that ion mobility measurements can be used to characterize nanoscale inorganic molecules
Stability of High Temperature Chemical Vapor Deposited Silicon Based Structures on Metals for Solar Conversion.
International audienc
Impact of sea level rise on submergence, salinity and agricultural production in a coastal province of the Mekong River Delta, Vietnam [Abstract only].
In German Aerospace Center (DLR); Germany. Federal Ministry of Education and Research (BMBF). Mekong Environmental Symposium, Ho Chi Minh City, Vietnam, 5-7 March 2013. Abstract volume, Topic 09 - Mekong Delta: climate change related challenges. Wessling, Germany: German Aerospace Center (DLR); Bonn, Germany: Federal Ministry of Education and Research (BMBF)
Coupled models of heat transfer and phase transformation for the run-out table in hot rolling
Molecular effects of the ubiquitous diatom Skeletonema marinoi on the copepods Calanus helgolandicus
We introduces the umodules, a generalisation of the notion of graph module.
The theory we develop captures among others undirected graphs, tournaments,
digraphs, and structures. We show that, under some axioms, a unique
decomposition tree exists for umodules. Polynomial-time algorithms are provided
for: non-trivial umodule test, maximal umodule computation, and decomposition
tree computation when the tree exists. Our results unify many known
decomposition like modular and bi-join decomposition of graphs, and a new
decomposition of tournaments.Comment: Soumis \`a ISAAC 200
STCF Conceptual Design Report: Volume 1 -- Physics & Detector
International audienceThe Super -Charm facility (STCF) is an electron-positron collider proposed by the Chinese particle physics community. It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of or higher. The STCF will produce a data sample about a factor of 100 larger than that by the present -Charm factory -- the BEPCII, providing a unique platform for exploring the asymmetry of matter-antimatter (charge-parity violation), in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions, as well as searching for exotic hadrons and physics beyond the Standard Model. The STCF project in China is under development with an extensive R&D program. This document presents the physics opportunities at the STCF, describes conceptual designs of the STCF detector system, and discusses future plans for detector R&D and physics case studies