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Roles of individual pigments in ultrafast excitation dynamics of light-harvesting phycobiliproteins revealed by recombinant techniques and two-dimensional electronic spectroscopy

Announce Type: replace Abstract: Phycobiliproteins serve as highly efficient light-harvesting antennae in cyanobacteria, yet the molecular factors governing their ultrafast energy relaxation and coherence dynamics remain incompletely understood. In this study, we investigate the role of pigment arrangement and pigment-protein interactions by combining recombinant protein engineering with two-dimensional electronic spectroscopy (2D-ES). In addition to wild-type allophycocyanin (APC) and...

arXiv Physics 6d ago

Chinese President Xi Jinping to visit North Korea on Jun 8 and 9

Chinese President Xi Jinping to visit North Korea on Jun 8 and 9 This will be the Chinese supremo's first overseas trip of the year, and comes shortly after his recent meetings in Beijing with both United States President Donald Trump and Russian President Vladimir Putin in May. Chinese President Xi Jinping will visit North Korea on Jun 8 and 9, state news agency Xinhua said on Friday (Jun 5), in his first overseas trip of the year.

Channel News Asia 5d ago

Can Local Learning Match Self-Supervised Backpropagation?

arXiv:2601.21683v2 Announce Type: replace Abstract: While end-to-end self-supervised learning with backpropagation (global BP-SSL) has become central for training modern AI systems, theories of local self-supervised learning (local-SSL) have struggled to build functional representations in deep neural networks. To establish a link between global and local rules, we first develop a theory for deep linear networks: we identify conditions for local-SSL algorithms (like Forward-forward or CLAPP)...

arXiv CS 7d ago

Branch-Level Energy Localization in Three-Phase Loads: Resolving Indeterminacy in Time-Domain

arXiv:2606.07076v1 Announce Type: cross Abstract: This paper develops a branch-level energy-localization framework for three-phase loads. The instantaneous terminal power of an admissible lumped equivalent is decomposed uniquely as Joule dissipation plus magnetic and electric stored-energy rates, branch by branch. Three formal results are established: a Branch-Level Localization Theorem (uniqueness given an admissible topology); a Topology-Indeterminacy Theorem (multiple admissible...

arXiv CS 2d ago

Marvell enters the AI network fray with 102.4 Tbps switch silicon

Marvell enjoyed a fillip from Nvidia chief Jensen Huang at Computex, who praised the firm as it unveiled the latest 102.4 Tbps switch silicon it has purpose-built for AI infrastructure. The fabless semiconductor biz announced upcoming availability of its Teralynx T100 chip to coincide with the Taiwanese trade show, claiming that it needs 25 percent lower power than competitive solutions with lower latency for AI training and inference workloads. But the firm is late to this party, as other...

The Register 8d ago

Ahrefs vs SEMrush: Which SEO Tool Should You Use?

SEMrush and Ahrefs are among the most popular tools in the SEO industry. Both companies have been in business for years and have thousands of customers per month. If you're a professional SEO or trying to do digital marketing on your own, at some point you'll likely consider using a tool to help with your efforts.

TechCrunch 1562d ago

Technology used to monitor conservation efforts at Rome's Colosseum to be used at the Ipiranga Museum

Technology used to monitor conservation efforts at Rome's Colosseum to be used at the Ipiranga Museum Sadie Harley Scientific Editor Andrew Zinin Lead Editor The same three-dimensional laser scanning technology used to monitor the Colosseum in Rome will be used in a conservation project at the Ipiranga Museum in São Paulo, Brazil. Beatriz Kuhl, a professor at the University of São Paulo's Faculty of Architecture and Urbanism (FAU-USP), presented the initiative, which is scheduled to begin in...

Phys.org 2d ago

Branch-Level Energy Localization in Three-Phase Loads: Resolving Indeterminacy in Time-Domain

Announce Type: replace-cross Abstract: This paper develops a branch-level energy-localization framework for three-phase loads. The instantaneous terminal power of an admissible lumped equivalent is decomposed uniquely as Joule dissipation plus magnetic and electric stored-energy rates, branch by branch. Three formal results are established: a Branch-Level Localization Theorem (uniqueness given an admissible topology); a Topology-Indeterminacy Theorem (multiple admissible topologies reproduce...

arXiv CS 1d ago