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With new optical device, Stanford engineers can fine tune the color of light

Stanford researchers have developed an optical device that changes and fine-tunes the frequencies of each individual photon in a stream of light to virtually any mixture of colors. This new photonic architecture could transform fields ranging from digital communications and artificial intelligence to cutting-edge quantum computing.

Why is climate change at the center of a $2.3 trillion federal plan?

Stanford engineering, climate and geophysics experts discuss why climate change resiliency is at the center of federal infrastructure plans, how it could affect underserved communities and where to target investment for maximum impact. President Biden's American Jobs Plan is a wide-ranging infrastructure initiative to rebuild highways, airports, water systems and more to "prevent, reduce and withstand the impacts of the climate crisis."

Hard-to-quantify emissions are the next frontier for Stanford sustainability goals

Stanford is expecting to achieve 80% reduction in emissions from campus operations by 2022 when a new solar facility comes online. Now, Stanford is beginning to measure Scope 3 emissions, the indirect emissions from such things as growing and transporting food, travel, investments and producing the goods we buy. Sally Benson, professor of energy resources engineering and graduate student, Rebecca Grekin, are working on a tool to make quantifying Scope 3 emissions easier.

Ram Rajagopal: How the grid is becoming more human-centric

In this Future of Everything podcast, grid expert Ram Rajagopal, associate professor of civil and environmental engineering, discusses going from an "infrastructure-centric" model to a "human-centric" one. In order to move to a smarter, more inclusive, adaptable grid, new sensors and algorithms are needed to provide more data about who, how and when people are using power, says Rajagopal.

Chart: Five ways COVID changed Bay Area traffic

Data from traffic analytics firm INRIX shows Bay Area traffic not as sluggish and shorter than pre-pandemic levels. A study from Stanford, the Instituto Tecnológico Autónomo de México and the University of Chicago, reports that remote work due to the pandemic, saved commuters nationwide an estimated 60 million hours per day that added up to more than 9 billion hours saved in the first six months of the pandemic.

First closeups of how a lithium-metal electrode ages

Scientists at Stanford and SLAC have taken an atomic-scale look at how lithium-metal batteries lose charge during a process called "calendar aging". Lithium metal batteries have anodes which are much lighter and store more energy for a given volume and weight. For this study, the researchers tested a variety of electrolytes with different chemical makeups to get a general idea of how lithium-metal anodes age.

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