Abstract: This paper deals with the kinematic calibration of a two-axis over-constrained solar tracker. In an over-constrained mechanism, it is difficult to derive ...

President Donald Trump has given federal workers two additional days off around Christmas after he complained of “too many non-working holidays” on Juneteenth. Trump signed an executive order Thursday ...

Federal workers are getting a Christmas gift from President Trump. The president took executive action Thursday to ensure that federal workers get Christmas Eve and the day after Christmas off from ...

Two National Guard members were shot in broad daylight on Wednesday — allegedly by an Afghan national who once assisted U.S. forces — in what officials described as a “targeted” attack just blocks ...

A comprehensive review published in Brain Medicine illuminates the intricate connections between gut microbiota and sleep regulation, establishing the microbiota-gut-brain axis as a critical pathway ...

This offseason’s cutoff for Super Two arbitration eligibility is likely to land around two years and 139 or 140 days of service time, MLBTR has learned. MLB should finalize the cutoff within the next ...

THE MICROCHIP wars have been running since 2018. That was when America under Donald Trump (and later Joe Biden and Mr Trump again) began imposing increasingly onerous export restrictions on ...

Many of the most interesting bodies in our Solar System aren’t planets, but the moons that orbit them. They have active volcanoes, hydrocarbon oceans, geysers, and moon-wide oceans buried under icy ...

A clutch of 28 dinosaur eggs found in the Qinglongshan fossil reserve in central China is about 86 million years old, according to scientists who used an “atomic clock” method to date the samples.

X’s long-awaited encrypted DM feature, XChat, is becoming more widely available. Though the feature shipped in beta in May, XChat is now accessible for more users, including those who do not subscribe ...

As the watch exhibition known as Geneva Watch Days gets underway, Swiss watch brand Ulysse Nardin unveils another blend of technical mechanical prowess and decorative innovation: Freak [X Crystalium].

Astronomers using the James Webb Space Telescope have discovered a planet-forming disk that almost entirely lacks water, challenging prevailing theories. When you purchase through links on our site, ...