1,750 research outputs found
Evaluation of six peanut genotypes for pod rod resistance.
Evaluation of six peanut genotypes for rot resistance
Junior medical researchers: A neglected community with great academic potential
Medical research capacity development is a national priority to improve healthcare in South Africa (SA). The 2011 National Health Research Summit set a target of training 1 000 doctoral candidates in health sciences over the next 10 years. We advocate revitalised research training opportunities for junior clinicians to help achieve this target and to contribute to the creation of a thriving medical research network across SA
Experimental evidence of parametric decay processes in the variable specific impulse magnetoplasma rocket (VASIMR) helicon plasma source
Decay waves have been observed in the megahertz range in the helium plasma generated by the variable specific impulse magnetoplasma rocket magnetoplasma thruster. They are measured using one of the tips of a triple probe connected to a 50âΩ input of a spectrum analyzer via a dc block (a small capacitor). The maximum amplitude of all waves is in the center of the plasma and does not appear correlated to the radial electron density or temperature profiles. The waves seem to be generated close to the helicon antenna that was 91âcm âupstreamâ from the measuring Langmuir probe. A possible explanation is parametric decay of the large amplitude helicon wave that also generates the plasma.This project was proudly supported by the International
Science Linkages programme established under the Australian
Governmentâs innovation statement Backing Australiaâs
Ability
Superconductivity in Cu_xTiSe_2
Charge density waves (CDWs) are periodic modulations of the conduction
electron density in solids. They are collective states that arise from
intrinsic instabilities often present in low dimensional electronic systems.
The layered dichalcogenides are the most well-studied examples, with TiSe_2 one
of the first CDW-bearing materials known. The competition between CDW and
superconducting collective electronic states at low temperatures has long been
held and explored, and yet no chemical system has been previously reported
where finely controlled chemical tuning allows this competition to be studied
in detail. Here we report how, upon controlled intercalation of TiSe_2 with Cu
to yield Cu_xTiSe_2, the CDW transition is continuously suppressed, and a new
superconducting state emerges near x = 0.04, with a maximum T_c of 4.15 K found
at x = 0.08. Cu_xTiSe_2 thus provides the first opportunity to study the CDW to
Superconductivity transition in detail through an easily-controllable chemical
parameter, and will provide new insights into the behavior of correlated
electron systems.Comment: Accepted to Nature Physic
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