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Showing 1–10 of 10 results
Advanced filters: Author: Arvind Ravikumar Clear advanced filters

  • Controlling light at scales smaller than its wavelength is attractive to manipulate light using small device footprints. Here, the authors propose a scheme to modify light on such small scales using a combination of metamaterial nanocavities coupled to nonlinear semiconductor heterostructures.

    • Omri Wolf
    • Salvatore Campione
    • Igal Brener
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-6

  • A differentiated natural gas market is emerging as a key mechanism to reduce greenhouse gas emissions across global natural gas supply chains. Trust in such voluntary markets across civil society, industry and governments depends on a transparent framework for reporting independently verifiable and accurate emissions data.

    • Arvind P. Ravikumar
    • Erin E. Tullos
    • Stefanie Rucker
    Comments & Opinion
    Nature Energy
    Volume: 8, P: 1174-1176

  • New work highlights the importance of basing US Inflation Reduction Act tax credits for low-carbon hydrogen production on life-cycle greenhouse gas emissions intensity assessments that are project- and supply-chain specific and informed by direct measurements of methane emissions.

    • Valeria Vallejo
    • Quoc Nguyen
    • Arvind P. Ravikumar
    ResearchOpen Access
    Nature Energy
    Volume: 9, P: 1571-1582

  • The European Union’s plan to phase out Russian natural gas imports by 2027 rests partly on increasing near-term imports of US liquefied natural gas. This will require a coordinated policy response that includes securing supplies from major exporters, global diplomacy, expanding import capacity, and alignment with Europe’s climate goals.

    • Arvind P. Ravikumar
    • Morgan Bazilian
    • Michael E. Webber
    Comments & Opinion
    Nature Energy
    Volume: 7, P: 465-467

  • Methane emissions from oil and gas systems are underestimated in official inventories. Here the authors synthesize thousands of field measurements and develop an inventory-based model for a better understanding of why this underestimation exists and how it can be fixed.

    • Jeffrey S. Rutherford
    • Evan D. Sherwin
    • Adam R. Brandt
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-12

  • Normothermic machine perfusion of the liver improved early graft function, demonstrated by reduced peak serum aspartate transaminase levels and early allograft dysfunction rates, and improved organ utilization and preservation times, although no differences were seen in graft or patient survival.

    • David Nasralla
    • Constantin C. Coussios
    • Peter J. Friend
    Research
    Nature
    Volume: 557, P: 50-56

  • Natural gas is seen as a key interim fuel along the pathway to a zero-carbon energy system, yet there is some concern it may delay the transition. This Analysis estimates the life cycle emissions from gas-fired electricity and the abatement potential of different mitigation options.

    • Sarah M. Jordaan
    • Andrew W. Ruttinger
    • Arvind P. Ravikumar
    Research
    Nature Climate Change
    Volume: 12, P: 1059-1067

  • Comprehensive and meaningful inclusion of marginalized communities within the research enterprise will be critical to ensuring an equitable, technology-informed, clean energy transition. We provide five key action items for government agencies and philanthropic institutions to operationalize the commitment to an equitable energy transition.

    • A. P. Ravikumar
    • E. Baker
    • M. Tuominen
    Comments & Opinion
    Nature Energy
    Volume: 8, P: 1-4

  • Production method (such as electrolysis and steam methane reforming) and related feedstock emissions are the key factors which influence hydrogen emissions from supply chains, according to life cycle assessment of hydrogen production pathways.

    • Esther G. Goita
    • Emily A. Beagle
    • Michael E. Webber
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 6, P: 1-10