More Like this

1. A High‐Energy Charge‐Separated State of 1.70 eV from a High‐Potential Donor–Acceptor Dyad: A Catalyst for Energy‐Demanding Photochemical Reactions

   https://doi.org/10.1002/ange.201606112  

   Lim, Gary N. ; Obondi, Christopher O. ; D'Souza, Francis ( August 2016 , Angewandte Chemie)

   A high potential donor–acceptor dyad composed of zinc porphyrin bearing threemeso‐pentafluorophenyl substituents covalently linked to C₆₀, as a novel dyad capable of generating charge‐separated states of high energy (potential) has been developed. The calculated energy of the charge‐separated state was found to be 1.70 eV, the highest reported for a covalently linked porphyrin–fullerene dyad. Intramolecular photoinduced electron transfer leading to charge‐separated states of appreciable lifetimes in polar and nonpolar solvents has been established from studies involving femto‐ to nanosecond transient absorption techniques. The high energy stored in the form of charge‐separated states along with its persistence of about 50–60 ns makes this dyad a potential electron‐transporting catalyst to carry out energy‐demanding photochemical reactions. This type of high‐energy harvesting dyad is expected to open new research in the areas of artificial photosynthesis especially producing energy (potential) demanding light‐to‐fuel products.

    

   more » « less
2. Features of the Energy Spectrum of Cosmic Rays above 2.5×1018  eV Using the Pierre Auger Observatory

   https://doi.org/10.1103/PhysRevLett.125.121106  

   Aab, A. ; Abreu, P. ; Aglietta, M. ; Albury, J. M. ; Allekotte, I. ; Almela, A. ; Alvarez Castillo, J. ; Alvarez-Muñiz, J. ; Alves Batista, R. ; Anastasi, G. A. ; et al ( September 2020 , Physical Review Letters)

   null (Ed.)
3. Home Energy Management with Clothing Integrated Thermal Comfort and EV SOC Concern

   https://doi.org/10.1109/PESGM48719.2022.9917003  

   Liu, Xuebo ; Wu, Yingying ; Zhang, Hang ; Liu, Bo ; Edmonds, Lawryn ; Wu, Hongyu ( July 2022 , 2022 IEEE Power & Energy Society General Meeting (PESGM))

   This paper proposes a home energy management system (HEMS) while considering the residential occupant’s clothing integrated thermal comfort and electrical vehicles (EV) state-of-charge (SOC) concern. An adaptive dynamic program- ming (ADP) based HEMS model is proposed to optimally determine the setpoints of heating, ventilation, air conditioning (HVAC), the donning/doffing decisions for the clothing conditions and charging/discharging of EV while taking into account the uncertainties in outside temperature and EV arrival SOC. We use model predictive control (MPC) to simulate a multi-day energy management of a residential house equipped with the proposed HEMS. The proposed HEMS is compared with a baseline case without the HEMS. The simulation results show that a 47.5% of energy cost saving can be achieved by the proposed HEMS while maintaining satisfactory occupant thermal comfort and negligible EV SOC concerns. 

   more » « less
4. A Search for Photons with Energies Above 2 × 10 17 eV Using Hybrid Data from the Low-Energy Extensions of the Pierre Auger Observatory

   https://doi.org/10.3847/1538-4357/ac7393  

   Abreu, P. ; Aglietta, M. ; Albury, J. M. ; Allekotte, I. ; Cheminant, K. Almeida ; Almela, A. ; Alvarez-Muñiz, J. ; Batista, R. Alves ; Yebra, J. Ammerman ; Anastasi, G. A. ; et al ( July 2022 , The Astrophysical Journal)

   Abstract Ultra-high-energy photons with energies exceeding 10 17 eV offer a wealth of connections to different aspects of cosmic-ray astrophysics as well as to gamma-ray and neutrino astronomy. The recent observations of photons with energies in the 10 15 eV range further motivate searches for even higher-energy photons. In this paper, we present a search for photons with energies exceeding 2 × 10 17 eV using about 5.5 yr of hybrid data from the low-energy extensions of the Pierre Auger Observatory. The upper limits on the integral photon flux derived here are the most stringent ones to date in the energy region between 10 17 and 10 18 eV. 

   more » « less
5. Evidence of Intermediate-scale Energy Spectrum Anisotropy of Cosmic Rays E ≥ 10 19.2 eV with the Telescope Array Surface Detector

   https://doi.org/10.3847/1538-4357/aac9c8  

   Abbasi, R. U. ; Abe, M. ; Abu-Zayyad, T. ; Allen, M. ; Azuma, R. ; Barcikowski, E. ; Belz, J. W. ; Bergman, D. R. ; Blake, S. A. ; Cady, R. ; et al ( August 2018 , The Astrophysical Journal)