The Giant Steerable Science Mirror prototype is being developed to assess the tertiary mirror system of equi-jec 7 the Thirty Meter Telescope.In this study, a new semi-kinematic coupling design is proposed for the prototype based on three pairs of V-grooves and canoe-like components to allow for high repeatability accuracy under heavy loads.A mathe
This review is devoted to the safety issues of anticoagulant therapy prescribed for the prevention of stroke and systemic embolism in patients with atrial fibrillation.Direct oral anticoagulants are considered worldwide in accordance with the guidelines for the diagnosis and treatment of atrial fibrillation as the preferred anticoagulant choice for
The brain is among the most energetically costly organs in the vertebrate body, while the size of the brain varies within species.The expensive-tissue hypothesis (ETH) predicts that increasing the size of another costly organ, such as the gut, should compensate for the cost of a small brain.Here, the ETH was tested by analyzing johnny cash style cl
The recent growing interest on the Mantodea fauna of southern Europe and Portugal in particular, has enabled the discovery of two geographically separated populations of hitherto unknown species in Europe.Analysis of read more specimens shows that they belong to two Afrotropical mantids: Miomantis caffra Saussure, 1871 and Miomantis paykullii Stal,
The transmission lines are complex in distribution and it is difficult to effectively detect their faults.Among them, the connecting fittings are susceptible to corrosion and other faults due to their long exposure to complex environments.Aiming at the problem that the transmission line connection fitting components are varied in scale and have poo