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Disentangling the Effects of Temperature, Clouds, and Gravity on K i Doublet in L Dwarfs

Research Notes of the AAS 2025年第4期9卷 87-87页

作者： Alexandra J. Baldelli Genaro Suárez Kelle L. Cruz Jacqueline K. Faherty Austin Rothermich Department of Astrophysics American Museum of Natural History Central Park West at 79th Street NY 10024 USA Department of Applied Physics and Applied Mathematics Columbia University New York NY USA Department of Physics and Astronomy Hunter College City University of New York 695 Park Avenue New York NY 10065 USA Department of Physics Graduate Center City University of New York 365 Fifth Avenue New York NY 10016 USA

We investigate the effects of surface gravity, effective temperature, and cloudiness on the potassium doublet (K i) at 1.17 μm in brown dwarf spectra. Using pseudo-Voigt profiles to fit the K i doublet in Sonora Diamondback atmospheric model spectra, we find that gravity and cloudiness affect the spectra differently in mid to late-L dwarfs. The full-width at half-maximum (FWHM) is strongly correlated with surface gravity, while the maximum depth strongly correlates with cloudiness. This method allows us to separate the effects of clouds and surface gravity on the K i 1.17 μm doublet. We also find that the FWHM and maximum depth of the doublet can help to estimate the effective temperature and surface gravity in early to mid-L dwarfs.

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Multifunctional resonant wavefront-shaping meta-optics based on multilayer and multi-perturbation nonlocal metasurfaces

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Light(Science & Applications) 2022年第9期11卷 2194-2206页

作者： STEPHANIE CMALEK ADAM COVERVIG ANDREA ALÙ NANFANG YU Department of Applied Physics and Applied Mathematics Columbia UniversityNew YorkNY 10027USA Photonics Initiative Advanced Science Research CenterCity University of New YorkNew YorkNY 10031USA Physics Program Graduate CenterCity University of New YorkNew YorkNY 10016USA

Photonic devices rarely provide both elaborate spatial control and sharp spectral control over an incoming *** optical metasurfaces,for example,the localized modes of individual meta-units govern the wavefront shape over a broad bandwidth,while nonlocal lattice modes extended over many unit cells support high quality-factor ***,we experimentally demonstrate nonlocal dielectric metasurfaces in the near-infrared that offer both spatial and spectral control of light,realizing metalenses focusing light exclusively over a narrowband resonance while leaving off-resonant frequencies *** devices attain this functionality by supporting a quasi-bound state in the continuum encoded with a spatially varying geometric *** leverage this capability to experimentally realize a versatile platform for multispectral wavefront shaping where a stack of metasurfaces,each supporting multiple independently controlled quasi-bound states in the continuum,molds the optical wavefront distinctively at multiple wavelengths and yet stay transparent over the rest of the *** a platform is scalable to the visible for applications in augmented reality and transparent displays.

关键词： spectrum resonant supporting

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programming Variational Quantum Circuits with Quantum-Train Agent

Programming Variational Quantum Circuits with Quantum-Train ...

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Quantum Communications, Networking, and Computing (QCNC), International Conference on

作者： Chen-Yu Liu Samuel Yen-Chi Chen Kuan-Cheng Chen Wei-Jia Huang Yen-Jui Chang Graduate Institute of Applied Physics National Taiwan University Taipei Taiwan Hon Hai (Foxconn) Research Institute Taipei Taiwan Wells Fargo New York NY USA Department of Electrical and Electronic Engineering Imperial College London London UK Centre for Quantum Engineering Science and Technology (QuEST) Imperial College London London UK Quantum Information Center Chung Yuan Christian University Taoyuan City Taiwan Master Program in Intelligent Computing and Big Data Chung Yuan Christian University Taoyuan City Taiwan

ISBN: (数字)9798331531591

ISBN: (纸本)9798331531607

This study introduces the Quantum-Train Quantum Fast Weight programmer (QT-QFWP) framework, enabling efficient and scalable programming of variational quantum circuits (VQCs) through quantum-driven parameter updates for the classical slow programmer controlling the fast programmer VQC. By optimizing quantum and classical parameter management, QT-QFWP significantly reduces parameters (by 70–90%) compared to Quantum Long Short-Term Memory (QLSTM) and Quantum Fast Weight programmer (QFWP) while maintaining accuracy. Benchmarking on time-series tasks—including Damped Simple Harmonic Motion (SHM), NARMA5, and Simulated Gravitational Waves (GW)—demonstrates superior efficiency and predictive accuracy. QT-QFWP is particularly advantageous for near-term quantum systems, addressing qubit and gate fidelity constraints, enhancing VQC deployment in time-sensitive applications, and expanding quantum computing’s role in machine learning.

关键词： Quantum system Accuracy Computational modeling Qubit Neural networks programming Predictive models Quantum circuit physics Long short term memory

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Amplification of enzymatic and microbial fuel cells using organic electrochemical transistors

Device

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Device 2025年

作者： Saxena, Ravindra Zhang, Xu Cai, Rong Suggs, Olivia Bruggeman, Chase Hickey, David P. Ajo-Franklin, Caroline M. Verduzco, Rafael Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston 77005 TX United States Department of Biosciences Rice University Houston 77005 TX United States Department of Chemical Engineering and Materials Science Michigan State University East Lansing 48824 MI United States Department of Bioengineering Rice University Houston 77005 TX United States Department of Chemical and Biomolecular Engineering Rice University Houston 77005 TX United States Rice Advanced Materials Institute Rice University Houston 77005 TX United States

Organic electrochemical transistors (OECTs) are thin-film devices operated in aqueous and biological environments for sensing chemicals and biomolecules. However, most sensor configurations involve introducing the target biomolecule directly in the OECT device. This has drawbacks because it may not be possible to have an electrolyte compatible with the target biomolecule or an environment optimal for the OECT. Here, we demonstrate a general and modular approach to building electrochemical sensors by coupling OECTs electronically with either an enzymatic fuel cell (EFC) or microbial fuel cell (MFC). We demonstrate that this modular approach can amplify currents by three orders of magnitude and enhance the signal-to-noise ratio. We also show that the power generated by the fuel cell can help tune the sensor's response for different applications. This work demonstrates a simple and versatile approach for amplifying currents from MFCs and EFCs useful for the development of bioelectronic sensors. © 2025 The Authors

关键词： amplification biosensors DTI-3: Develop electro-active bacteria enzymatic fuel cells microbial fuel cells organic electrochemical transistors power

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Petroleum system analysis of the Ras Ghara oil Field: Geochemical evaluation and 2D basin modelling of pre-rift and syn-rift formations in the southern Gulf of Suez, Egypt

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Marine and Petroleum Geology 2025年 180卷

作者： Reda, Mohamed Salem, Tamer Abdel-Fattah, Mohamed I. Fathy, Mohamed Farouk, Sherif Al-Kahtany, Khaled Gentzis, Thomas Al-Azhar University Faculty of Science Geology Department P.O. Box 11884 Nasr City Cairo Egypt EGPC Khalda Petroleum Company Exploration Department P.O. BOX 560 Maadi Cairo Egypt Petroleum Geosciences and Remote Sensing Program Department of Applied Physics and Astronomy College of Sciences University of Sharjah Sharjah27272 United Arab Emirates Geology Department Faculty of Science Suez Canal University Ismailia Egypt Geology and Geophysics Department College of Science King Saud University Riyadh Saudi Arabia Exploration Department Egyptian Petroleum Research Institute Nasr City11727 Egypt Core Laboratories US Geoscience 6316 Windfern Road HoustonTX77040 United States

The southern Gulf of Suez is a prolific hydrocarbon province with considerable exploration potential. This study presents an integrated geochemical and 2D basin modeling evaluation of the petroleum system in the Ras Ghara oil field, with the aim of constraining source rock characteristics, thermal maturity, and hydrocarbon generation and migration processes. Geochemical analyses of cutting samples from the Ghara Land-1 well, spanning the Nukhul to Lower Senonian formations (1995–2223 m), reveal two main source rock types: an oil-prone marine shale with TOC values up to 4.43 wt% and HI values up to 554 mg HC/g TOC, and a mixed oil/gas-prone type with moderate TOC and HI values. Biomarker data and extract composition indicate deposition under anoxic, carbonate-rich marine conditions. Pyrolysis Tmax (416–430 °C), vitrinite reflectance (0.48–0.62 % Ro), and biomarker maturity parameters confirm immature to early oil window conditions in the sampled interval. The 2D basin model, constructed using structural and stratigraphic data from multiple wells and calibrated with measured maturity parameters, simulates the burial and thermal evolution of the source rocks. Modeling results show that the deeper Nukhul and Matulla formations reached peak maturity during the Mid-Cretaceous, with a critical hydrocarbon generation and migration moment around 80 Ma. Vertical migration, enhanced by Miocene fault reactivation, led to the redistribution of hydrocarbons into overlying reservoirs. Structural features, including NW-trending faults and accommodation zones, played a key role in directing fluid flow and trap development. This integrated analysis provides a comprehensive understanding of the petroleum system in Ras Ghara and offers a valuable framework for guiding future exploration strategies in the structurally complex southern Gulf of Suez. © 2025 Elsevier Ltd

关键词： Gas chromatography

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Protein Folding as a Jamming Transition

PRX Life

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PRX Life 2025年第1期3卷 013018-013018页

作者： Alex T. Grigas Zhuoyi Liu Jack A. Logan Mark D. Shattuck Corey S. O'Hern Graduate Program in Computational Biology and Biomedical Informatics Yale University New Haven Connecticut 06520 USA Integrated Graduate Program in Physical and Engineering Biology Yale University New Haven Connecticut 06520 USA Department of Mechanical Engineering Yale University New Haven Connecticut 06520 USA Benjamin Levich Institute and Physics Department The City College of New York New York New York 10031 USA Department of Physics Yale University New Haven Connecticut 06520 USA Department of Applied Physics Yale University New Haven Connecticut 06520 USA

Proteins fold to a specific functional conformation with a densely packed core that controls their stability. Despite their importance, we lack a quantitative explanation for why all protein cores, regardless of their overall fold, possess the same average packing fraction 〈ϕ〉≈0.55. However, important developments in the physics of jamming in particulate systems can shed light on the packing of protein cores. Here, we extend the framework of jamming to describe core packing in collapsed polymers, as well as in all-atom models of folded proteins. First, we show in a spherical bead-spring polymer model (with and without bond-angle constraints) that as the hydrophobic interactions increase relative to thermal fluctuations, a jamming-like transition occurs when the core packing fraction exceeds ϕc with the same power-law scaling behavior for the potential energy Vr, excess contact number ΔN, and characteristic frequency of the vibrational density of states ω* versus Δϕ=ϕ−ϕc as that for jammed particulate systems. Then, we develop an all-atom model for proteins and find that, above ϕc∼0.55, protein cores undergo a jamming-like transition, but with anomalous power-law scaling for Vr, ΔN, and ω* versus Δϕ. The all-atom protein model remains close to the native protein structure during jamming and accurately refolds from partially unfolded states.

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The Large Hadron electron Collider as a bridge project for CERN

arXiv

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arXiv 2025年

作者： Ahmadova, F. André, K. Armesto, N. Azuelos, G. Behnke, O. Boonekamp, M. Bonvini, M. Britzger, D. Brüning, O. Bud, T.A. Cooper-Sarkar, A.M. D’Hondt, J. D’Onofrio, M. Fischer, O. Forthomme, L. Giuli, F. Gwenlan, C. Hammou, E. Holzer, B. Khanpour, H. Klein, U. Kostka, P. Lappi, T. Mäntysaari, H. Mellado, B. Newman, P.R. Olness, F.I. Osborne, J.A. Papaphilippou, Y. Paukkunen, H. Piotrzkowski, K. Polini, A. Rojo, J. Schott, M. Schumann, S. Schwanenberger, C. Staśto, A.M. Stocchi, A. Tentori, S. Tevio, M. Wang, C. Yamazaki, Y. Max-Planck-Institut für Physik Boltzmannstr. 8 Garching85748 Germany Department of Physics Universität Zürich Winterthurerstrasse 190 ZürichCH-8057 Switzerland CERN Meyrin Switzerland Instituto Galego de Física de Altas Enerxías IGFAE Universidade de Santiago de Compostela Galicia Santiago de Compostela15782 Spain Group of Particle Physics Université de Montréal MontréalQC Canada TRIUMF VancouverBC Canada Deutsches Elektronen-Synchrotron DESY Notkestr. 85 Hamburg22607 Germany CEA/IRFU Gif-sur-Yvette France INFN Sezione di Roma Piazzale Aldo Moro 5 Roma00185 Italy Department of Physics University of Oxford Denys Wilkinson Building Keble Road OxfordOX1 3RH United Kingdom Nikhef Science Park 105 Amsterdam1098 XG Netherlands Department of Physics University of Liverpool Oxford Street LiverpoolL69 7ZE United Kingdom Department of Mathematical Sciences University of Liverpool LiverpoolL69 3BX United Kingdom AGH University Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 Kraków30-055 Poland Dipartimento di Fisica Università degli Studi di Roma Tor Vergata INFN Sezione di Roma Tor Vergata Via della Ricerca Scientifica 1 Rome00133 Italy DAMTP University of Cambridge Wilberforce Road CambridgeCB3 0WA United Kingdom University of Jyväskylä Department of Physics P.O. Box 35 FI-40014 Finland Helsinki Institute of Physics University of Helsinki P.O. Box 64 FI-00014 Finland School of Physics and Astronomy University of Birmingham B15 2TT United Kingdom Department of Physics Southern Methodist University DallasTX75275 United States INFN Sezione di Bologna Via C. Berti Pichat 4/2 Bologna40127 Italy Department of Physics and Astronomy Vrije Universiteit AmsterdamNL-1081 HV Netherlands Physikalisches Institut Universität Bonn Nussallee 12 Bonn53115 Germany Institut für Theoretische Physik Universität Göttingen Friedrich-Hund-Platz 1 Göttingen37077 Germany Universität Hamburg Luruper Chaussee 149 Hamburg22761

The LHeC is the project for delivering electron-nucleon collisions at CERN using the HL-LHC beams. An Energy Recovery Linac in racetrack configuration will provide 50 GeV electrons to achieve centre-of-mass energies around 1 TeV/nucleon and instantaneous luminosities around 1034 cm−2s−1. The LHeC program elaborated in the CDR of 2021 included a phase with concurrent operation of electron-hadron and hadron-hadron collisions, followed by a standalone phase of electron-hadron collisions only. In view of the current HL-LHC schedule, in this paper we have examined the possibilities of a program after the regular HL-LHC program with only electron-proton operation. In this operation mode, the LHeC would serve as an impactful bridge project between major colliders at CERN. The standalone physics program comprises electroweak, Higgs, top-quark, BSM and strong-interaction physics. In addition, it empowers the physics analyses at the HL-LHC by retrofitting measurements and searches with significantly more precise knowledge of the proton structure and αs. The accelerator technology deployed in the Energy Recovery Linac for the LHeC is a major stepping-stone for the performance, cost reduction and training for future colliders. The capital investments in the LHeC electron accelerator can be reused in a cost-efficient way as the injector for the FCC-ee. Finally, data from the LHeC are essential to enable the physics potential of any new high-energy hadron collider. The operational plan of 6 years easily fits in the period between two major colliders at CERN. Similar to the LHeC empowering the HL-LHC physics program, the FCC-eh would be an impactful addition to the FCC physics program. © 2025, CC BY.

关键词： Hadrons

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Multi-wavelength fibril dynamics and oscillations above sunspot– I. morphological signature

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Research in astronomy and Astrophysics 2015年第11期15卷 1843-1856页

作者： Emanuel Sungging Mumpuni Dhani Herdiwijaya Mitra Djamal Thomas Djamaluddin Graduate Program in Astronomy Faculty of Mathematics and Natural Sciences Bandung Institute of TechnologyGedung CAS Lt. 6 ITB Jl. Ganesha 10 Bandung 40132 Indonesia Space Science Center LAPAN Graduate Program in Physics Faculty of Mathematics and Natural Sciences Bandung Institute of Technology Department of PhysicsJl. Ganesha 10 Bandung 40132 Indonesia

In this work we selected one particular fibril from a high resolution observation of the solar chromosphere with the Dutch Open Telescope, and tried to obtain a broad picture of the intricate mechanism that might be operating in the multiple layers of the solar atmosphere visible in high cadence multi-wavelength observations. We analyzed the changing fibril pattern using multi-wavelength tomography, which consists of both the Hα line center and the blue wing, Doppler signal, Ca II H, and the G-band. We have found that the intermittent ejected material through the fibril from Doppler images has clearly shown an oscillation mode, as seen in the Hα blue *** oscillations in the umbrae and penumbrae magnetic field lines that are above the sunspot cause a broadening and the area forms a ring shape from 3 to 15 minute oscillations as a function of height. These made a distinct boundary between the umbrae and penumbrae which suggests a comb structure, and indicates that the oscillations could propagate along the inclined magnetic flux tubes from below. The 3 minute oscillations strongly appeared in the broadly inclined penumbrae magnetic field lines and showed a clear light bridge. The well known 5 minute oscillations were dominant in the umbrae-penumbrae region boundary. The long 7 minute oscillations were transparent in the Hα blue wing, as well as the 10 and 15 minute oscillations. They were concentrated in the inner-penumbrae, as seen in the Hα line center. From these findings we propose that the fibril acts as a fabric for interaction between the layers,as well as related activities around the active region under investigation.

关键词： minute morphological signature picture propagate fabric Figure sector visible concentrated

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Corrigendum to “Biochemical implications of the Bottom Boundary Layer Detachment at the Mid-Atlantic Bight shelf-break front” [Continent. Shelf Res. 286 (2025) 105408]

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Continental Shelf Research 2025年 288卷

作者： Serena Negroni Dennis J. McGillicuddy Glen G. Gawarkiewicz Paolo Oddo Nadia Pinardi Department of Physics and Astronomy (DIFA) University of Bologna Bologna 40126 Italy MIT/WHOI Joint Program in Oceanography/Applied Ocean Sciences and Engineering Woods Hole 02543 MA USA Woods Hole Oceanographic Institution Woods Hole 02543 MA USA

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Preliminary results from real and synthetic data using the MASW-Dual Streamer (DS) technique 27

Preliminary results from real and synthetic data using the M...

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27th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2021, NSG 2021

作者： Hamdan, H. Kritikakis, G. Harb, M. Vafidis, A. Petroleum Geosciences and Remote Sensing Program Department of Applied Physics and Astronomy University of Sharjah Applied Geophysics Lab. Technical University of Crete

ISBN: (纸本)9789462823860

The preliminary results of a new proposed technique for the data acquisition of the 2D MASW method is discussed in this extended abstract. This technique aims at increasing the fieldwork productivity of the 2D MASW data acquisition significantly. It is estimated that this technique may increase the productivity of the filed work of more than 70% than the traditional land-streamer towed by truck technique. The basic idea is to perform two 2D MASW profiles simultaneously for each run of the truck, employing two land streamers, two seismic recording instruments, but only one seismic source for both receiver arrays, located in the middle of the two profiles. This work aims to investigate the applicability of the proposed acquisition technique and the accuracy of the acquired data, using real data taken from two different sites as well as synthetic seismic data. The dispersion curves and S-wave profile comparison between the traditional and the proposed technique for the real and synthetic data was found to be quite encouraging. The proposed technique manages to reproduce the S-wave profiles resulted from the conventional MASW deployment, in the framework of an acceptable, for the engineers, error. Further basic research concerning the MASW-DS assumptions is considered necessary. © NSG 2021. All rights reserved.

关键词： Productivity

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