Although the universe is expanding at an accelerating rate today, this paper presents a simple mechanism by which a dynamical form of dark energy (known as quintessence) could cause the acceleration to come to end and smoothly transition from expansion to a phase of slow contraction. That raises questions, How soon could this transition occur? And at what point would it be detectable? The conclusions are that the transition could be surprisingly soon, maybe less than 100 million y from now, and yet, for reasons described in the main text, it is not yet detectable today. The scenario is not far-fetched. In fact, it fits naturally with recent theories of cyclic cosmology and conjectures about quantum gravity.
“there’s a new record to report: a new solar cell has hit 39.5 percent efficiency ”.
Scientists keep on pushing the efficiency of solar panels higher and higher, and there’s a new record to report: a new solar cell has hit 39.5 percent efficiency under the standard 1-sun global illumination conditions.
That 1-sun marker is simply a standardized way of measuring a fixed amount of sunlight, and almost 40 percent of that radiation can now be converted into electricity. The previous record for this type of solar panel material was 39.2 percent efficiency.
There are more types of solar cells around than you might have realized. The type used here, triple-junction III-V tandem solar cells, are often deployed in satellites and space vehicles, though they have plenty of potential here on solid ground as well.
Scientists have injected the first human patient with a new cancer-killing virus. The virus, known as Vaxinia, has seen successful tests in animals. However, the true test of its efficacy begins with this new clinical trial.
Imec plots a course to 1nm chips, and beyond.
Imec, the most advanced semiconductor research firm in the world, recently shared its sub-‘1nm’ silicon and transistor roadmap at its Future Summit event in Antwerp, Belgium. The roadmap gives us a rough idea of the timelines through 2036 for the next major process nodes and transistor architectures the company will research and develop in its labs in cooperation with industry giants, like TSMC, Intel, Samsung, and ASML, among many others.
The roadmap includes breakthrough transistor designs that evolve from the standard FinFET transistors that will last until 3nm, to new Gate All Around (GAA) nanosheets and forksheet designs at 2nm and A7 (seven angstroms), respectively, followed by breakthrough designs like CFETs and atomic channels at A5 and A2. As a reminder, ten Angstroms are equal to 1nm, so Imec’s roadmap encompasses sub-‘1nm’ process nodes.
You might not have heard of the Interuniversity Microelectronics Centre (imec) before, but it ranks among the most important companies in the world, alongside better-known companies like TSMC and EUV-toolmaker ASML. Think of imec as a silicon Switzerland, of sorts. While the semiconductor research-focused imec doesn’t operate with much fanfare, it serves as the quiet cornerstone of the semiconductor industry, bringing fierce rivals like Intel, TSMC, and Samsung together with chip toolmakers such as ASML and Applied Materials, not to mention the equally-critical semiconductor software design companies (EDA) like Cadence and Synopsys, in a non-competitive environment. This collaboration allows the companies to work together to define the next generation of tools and software they will use to design and manufacture the chips that power the world.
A team of scientists have re-engineered membrane technology to make it 150 times more efficient in capturing carbon dioxide (CO2) in gas mixtures leaving coal and natural-gas-fired thermal power plants.
Applying invented polymer chains to commercial membranes makes them 150 times more effective in capturing CO2.
The first experimental trial of a cancer-killing virus is underway. The treatment could offer an alternative to current options.
By resolving a paradox about light in a box, researchers hope to clarify the concept of energy in quantum theory.
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Musk agreed that if 25% of daily active users are fake accounts, the takeover should cost 25% less, equivalent to $11 billion.