Archive for the ‘energy’ category: Page 25

Nov 28, 2022

Rolls-Royce successfully tests hydrogen-powered jet engine

Posted by in categories: energy, transportation

LONDON, Nov 28 (Reuters) — Britain’s Rolls-Royce (RR.L) said it has successfully run an aircraft engine on hydrogen, a world aviation first that marks a major step towards proving the gas could be key to decarbonising air travel.

The ground test, using a converted Rolls-Royce AE 2100-A regional aircraft engine, used green hydrogen created by wind and tidal power, the British company said on Monday.

Rolls and its testing programme partner easyJet (EZJ.L) are seeking to prove that hydrogen can safely and efficiently deliver power for civil aero engines.

Nov 28, 2022

Fuel Ignition and Bottle Bubbles Snag Video Prize

Posted by in categories: energy, supercomputing

An annual APS video prize went to supercomputer simulations, control of chaotic Faraday waves, and studies of a large bubble in a bottle.

Nov 28, 2022

Rolls-Royce tests hydrogen-fueled aircraft engine in aviation world first

Posted by in categories: energy, government, military

British engineer Rolls-Royce has successfully used hydrogen instead of conventional jet fuel to power a modern aircraft engine in a world first for the aviation industry, according to the company.

The ground test, which took place at a government test facility at Boscombe Down, used green hydrogen generated by wind and tidal power from the Orkney Islands in Scotland.

Rolls-Royce used a converted AE 2100-A turboprop engine that powers civil and military aircraft to conduct the test in partnership with easyJet.

Nov 28, 2022

In a first, Rolls-Royce and easyJet successfully test a hydrogen-powered aircraft engine

Posted by in categories: energy, transportation

The test is a stepping stone to achieving carbon neutrality by 2050.

In what can be considered a promising first step towards transforming the aviation industry to become carbon-neutral, a project led by Rolls Royce and easyJet has successfully tested a modern-day jet engine that runs solely on hydrogen.

The prototype for the experiment, which was conducted at a test facility at the Ministry of Defence Boscombe Down, U.K., was a commonly-used Rolls-Royce AE-2100A regional aircraft engine. The turbine was supplied with ‘green’ hydrogen, which was made by splitting water into its constituent components at European Marine Energy Centre in the Orkney Islands, U.K.

Continue reading “In a first, Rolls-Royce and easyJet successfully test a hydrogen-powered aircraft engine” »

Nov 28, 2022

A new analysis of the early universe sheds new light on the “cosmic dawn” of the universe

Posted by in categories: energy, space

The absence of the 21-centimeter hydrogen line allowed scientists to determine specific properties of the earliest galaxies in the universe.

An international group of astronomers, led by scientists at the University of Cambridge, just shed new light on the cosmic dawn of the universe, a press statement reveals.

The cosmic dawn is a very early period of the universe, during which the first stars and galaxies formed. The researchers used data from India’s SARAS3 radio telescope to analyze this period of the cosmos and determine mass and energy output limits for the first stars and galaxies.

Nov 28, 2022

For the first time, Tesla just completed a full load 500-mile trip with its Semi truck

Posted by in categories: Elon Musk, energy, sustainability, transportation

Tesla Semi carried 81,000 pounds for 500 miles on a single charge.

Just a few days before Tesla begins shipping the truck, Elon Musk has verified that Tesla Semi, the company’s Class 8 semi-truck, has successfully completed a crucial voyage.

Although there is no reason to question the outcome, it would be interesting to learn more about speed and energy usage. We are pretty interested in seeing some impartial vehicle tests.

Continue reading “For the first time, Tesla just completed a full load 500-mile trip with its Semi truck” »

Nov 28, 2022

Higher speeds in free-space optical communications in the midinfrared band

Posted by in categories: energy, engineering, internet

Telecommunications have reshaped many aspects of our lives over the past few decades by providing incredibly convenient ways to share and access information. One of the most important enablers for this transformation has been the adoption and improvement of broadband technologies, which cram enormous amounts of data over wide frequency bands to achieve unprecedented transfer speeds. Today, most large cities have fiber optics-based networks that distribute high-speed internet directly to every home.

Unfortunately, it is not always feasible to deploy fiber optic links to and , due to the associated costs and civil engineering work required. Such places could benefit from a different approach to optical broadband communications: free-space optics. The main idea in free-space optical (FSO) communications is to set up aligned transmitter–receiver pairs where needed and use air as the medium to carry the signals.

While there are still many challenges to address in FSO systems (such as low energy efficiency, impact of weather, and high background noise), scientists worldwide are continuously trying out new ways of solving these issues and achieving higher data rates.

Nov 27, 2022

Hackers attacking energy sector using decades-old software, says Microsoft

Posted by in categories: cybercrime/malcode, energy, internet

Boa, an open-source web server suitable for embedded applications that was discontinued since 2005 is now becoming a security threat because of the complex nature of how it was built into the internet of things (IoT) device supply chain. A recent report by tech major Microsoft said that hackers are exploiting vulnerabilities in the software to target organizations in the energy sector.

Microsoft researchers revealed in an analysis that a vulnerable open-source component in the Boa web server, is used widely in a range of routers and security cameras as well as popular software development kits (SDKs), a set of tools that allow developers to write or use an existing framework to develop applications for a given platform.

Despite the software being discontinued a nearly two decades ago, Microsoft reports that attackers are continuing their attempts to exploit the flaws of the Boa web servers which include a high-severity information disclosure bug (CVE-2021–33558) and another arbitrary file access flaw (CVE-2017–9833). An unauthenticated attacker could exploit these vulnerabilities to obtain user credentials and leverage them for remote code execution.

Nov 25, 2022

Human-powered aircraft: Gossamer Albatross made history

Posted by in categories: energy, transportation

It accomplished this record-breaking feat in two hours and 49 minutes.

After aeronautical engineer Paul MacCready won the first Kremer Prize in 1977 for the flight of his human-powered Gossamer Condor over a closed circuit course, he decided to cross the English Channel by air on human-power only, according to a report by The Museum of Flight.

He thus built the Gossamer Albatross aircraft from the lessons learned with the Condor. “This light and fragile aircraft was pushed by a propeller connected through a series of gears to a constantly pedaling pilot,” explained an article in The Museum of Flight.

Continue reading “Human-powered aircraft: Gossamer Albatross made history” »

Nov 23, 2022

Survey: China is slowly diminishing US dominance over science

Posted by in categories: energy, science

China has more than doubled the percentage of ‘highly cited researchers’ over the last five years.

China has a steady increase in the number of “high-impact scientists” than the United States, which is still the leader but has seen a steady drop over the years.

Research fuels the race for knowledge.

Continue reading “Survey: China is slowly diminishing US dominance over science” »

Page 25 of 280First2223242526272829Last