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For years, we’ve been told to stick to a low-fat diet to protect ourselves from heart disease. But a new report says those guidelines were not backed by solid research when they were first issued decades ago.
Gas turbines are used for the production of electricity and in aircraft engines. To increase the life-span of the turbines, they are sprayed with a surface coating. The coating consists of two layers – one of metal to protect against oxidation and corrosion , and one of ceramic to give thermal insulation. The structure of the coating varies greatly, consisting of pores and cracks of different sizes. It is these cracks and pores that largely determine the efficiency of the thermal insulation and the length of the coating life-span.
The master craftsmanship behind Indian swords was highlighted when scientists and conservationists from Italy and the UK joined forces to study a curved single-edged sword called a shamsheer. The 75-centimeter-long sword from the Wallace Collection in London was made in India in the late eighteenth or early nineteenth century. The design is of Persian origin, from where it spread across Asia and eventually gave rise to a family of similar weapons called scimitars being forged in various Southeast Asian countries. Two different approaches were used to examine the shamsheer: the classical one (metallography) and a non-destructive technique (neutron diffraction).
Anyone could call up or modify several million pieces of customer data online including names, addresses and e-mails. Three students were able to show this for 40,000 online databases in both Germany and France. The cause is a misconfigured open source database upon which millions of online stores and platforms from all over the world base their services. If the operators blindly stick to the defaults in the installation process and do not consider crucial details, the data is available online, completely unprotected.
Researchers have developed a method for preparing methylammonium-lead bromide hybrid nanoparticles with extraordinary luminescence. They have successfully increased the luminescence efficiency of nanoparticles up to 80% and has also proven their high stability under ultraviolet visible light.