After the commodity plunged three years ago, the market saw an overall retrenchment, with close to $1 trillion taken out of company spending, according to a report from consultant Wood Mackenzie Ltd. Published Thursday. Concurrently, banks pulled back from lending to companies based on their oil and gas reserves, which mostly stung smaller players with weaker balance sheets, said Vigna..
It was odd to read AB de Villiers’ many tweets >commenting on the matches. These sympathised with his countrymen and always urged them to greater things, while occasionally praising England or offering opinion on match situations. The dressing room might have thought: if AB is investing so much energy into this at home why can’t he come and play? Du Plessis cannot have found it easy to have his best batsman on the sofa thousands of miles away..
Look through any of the bazillion “E Z fuel saving tips” lists the came out around Earth Day and you’ll see sensible speeds listed in there somewhere. This is because driving too fast burns excess fuel. In the UK, Ford is making this point to fleet operators with a chart released today that shows how driving 60 or 65 mph lowers fuel use and reduces CO2 emissions..
Nuclear spin polarization can be significantly increased through the process of hyperpolarization, leading to an increase in the sensitivity of nuclear magnetic resonance (NMR) experiments by 4 “8 orders of magnitude. Hyperpolarized gases, unlike liquids and solids, can often be readily separated and purified from the compounds used to mediate the hyperpolarization processes. These pure hyperpolarized gases enabled many novel MRI applications including the visualization of void spaces, imaging of lung function, and remote detection.
The results indicate that the growth inhibitory activity of resveratrol is abrogated by the removal of the trans stilbene double bond (no reduction of growth fraction in dihydroresveralogues at 100 M). Interestingly, at low doses (5 10 M), many resveralogues induce a significant increase in proliferation compared to control untreated cells. SIRT1 activity in the presence of each compound was measured using an in vitro deacetylation assay and, whilst most resveralogues are SIRT1 activators, none of the compounds examined produced a significant increase in SIRT1 activation compared to the parent compound.
In this paper, it was proposed that in the gross slip fretting regime, the wear coefficient increased by between one and two orders of magnitude as the fretting displacement amplitude increased from around 20 m to 300 m (defined as the limits of the gross slip regime).Since the publication of this paper, there have been many papers published in the literature regarding fretting in the gross sliding regime where such a strong dependence of wear coefficient upon fretting displacement has not been observed, with instead, the wear coefficient being shown to be almost independent of fretting amplitude. Indeed, many researchers have demonstrated that there is a good correlation between wear volume and frictional energy dissipated in the contact for many material combinations, with the additional insight that a threshold in energy dissipated in the contact exists, below which no wear is observed (experimental data relating to fretting of a high strength steel is presented in the current paper which supports this concept).It is argued that in deriving a wear coefficient in fretting, there are two key considerations which have not always been addressed: (i) the far field displacement amplitude is not an adequate substitute for the slip amplitude (the former is the sum of the latter together with any elastic deformation in the system between the contact and the point at which the displacement is measured); and (ii) there is a threshold in the fretting duration, below which no wear occurs and above which the rate of increase in wear volume with increasing duration is constant (this constant may be termed the wear coefficient, ktrue). Not addressing these two issues results in the derivation of a nominal wear coefficient (knominal) which is always less than ktrue.