Abstract: Despite metrological limitations, photovoltaic (PV) cells can be used as orbital sensors in order to evaluate sunlight incidence angles, sun position, and angular rates with acceptable ...

The Ukrainian leader says the document now needs to be signed by "presidents", without giving details of its content. Ukrainian, Russian and US officials will meet tomorrow.

Trump did not provide a reason for the decision, which comes after Canada's PM Mark Carney warned of a "rupture" in the ...

Gale Klappa has spent more than 22 years leading what is now the Midwest's largest utility. Here's what's next for the ...