Recently the large increase in amounts of methane plumes is detected reaching the Earths surface from depths of 500 m below sea level where it is known that there are large quantities of frozen methane hydrate stored [1]. However, if this release of methane continues to increase further (due to the warming of seawater at intermediate depths [1)) this will cause an uncontrollable rise in the Ear...

This paper reviews our recent experimental work on erbium incorporated into gallium arsenide during MBE growth. The electrical behaviour of the erbium is considered in relation to its interaction with intentionally added dopants (silicon, selenium and berylium) and the effect of the erbium on the deep state population is discussed. At higher concentrations the morphology of phase separation is ...

Temporal variation in two soil tests ([Al] and the ratio [Al]:[Na] in 1:5 0.005M KCl extract) and pH were evaluated on six occasions during a twelve month study of eleven yellow earths in the Merredin region (31°5, 118°E) of Western Australia. The [Al] and ratio [Al]:[Na] in 1:5 0.005M KCl extracts are useful soil tests capable of distinguishing between productive and non-productive (Al toxic) ...

The quadruple complex formed by terbium with 4-chlorosalicylic acid (CSA), EDTA and cetyltrimethylammonium bromide (CTMAB) has been used for the sensitive spectrofluorometric determination of terbium in mixed rare earths. The effect of the experimental conditions on the fluorescence intensity was defined. Under the optimum conditions selected, the fluorescence intensity was linear with the terb...

The radial density of planets increases with depth due to compressibility, leading impacts on their convective dynamics. To account for these effects, including the presence a quasi-adiabatic temperature profile and entropy sources dissipation, compressibility is expressed through dissipation number, $\mathcal{D}$, proportional planet's radius gravity. In Earth's mantle, effects are moderate, b...

We present an improved estimate of the occurrence rate of small planets orbiting small stars by searching the full four-year Kepler data set for transiting planets using our own planet detection pipeline and conducting transit injection and recovery simulations to empirically measure the search completeness of our pipeline. We identified 156 planet candidates, including one object that was not ...