Results 111 to 120 of about 1,662,373 (351)

An Online Tutor for Astronomy: The GEAS Self-Review Library [PDF]

, 2015
We introduce an interactive online resource for use by students and college instructors in introductory astronomy courses. The General Education Astronomy Source (GEAS) online tutor guides students developing mastery of core astronomical concepts and mathematical applications of general astronomy material. It contains over 12,000 questions, with linked
arxiv   +1 more source

Novel Use of Laser Zone‐Drawing on Nanofibers Enables Ultra‐Fast Thermal Kinetics and Precise Diameter Control

Advanced Materials Technologies, EarlyView.
This work explores the thermal kinetics of laser‐zone‐drawn electrospun nanofibers. Laser‐zone drawing is a technique that allows for localized heating of nanofiber segments, which results in better mechanical drawing. The high surface‐to‐volume ratio of nanofibers allows for ultrafast thermal kinetics at small diameters.
Matthew D. Flamini, Mohamad Keblawi, Thamires Lima, Robert V. Chimenti, Nicolas Alvarez, Vince Beachley   +5 more
wiley   +1 more source

Fully Passive Electrochemical Oxygen Sensor Enabled With Organic Electrochemical Transistor

Advanced Materials Technologies, EarlyView.
A wireless oxygen sensor that operates with low power without batteries, using organic electrochemical transistors (OECTs) powered by near‐field communication (NFC) is presented. The sensor combines an oxygen‐permeable membrane and a gel electrolyte to detect oxygen in air and complex liquids, making way for sustainable sensor technologies.
Lia Giulia D'Amico, Chenhong Zhang, Francesco Decataldo, Vito Vurro, Marta Tessarolo, Isacco Gualandi, Federica Mariani, Erika Scavetta, Tobias Cramer, Beatrice Fraboni   +9 more
wiley   +1 more source

A T-duality of non-supersymmetric heterotic strings and an implication for Topological Modular Forms

Journal of High Energy Physics
Motivated by recent developments connecting non-supersymmetric heterotic string theory to the theory of Topological Modular Forms (TMF), we show that the worldsheet theory with central charge (17, 3 2 $$ \frac{3}{2} $$ ) obtained by fibering the (E 8)1 ×
Vivek Saxena
doaj   +1 more source

Unveiling regions in multi-scale Feynman integrals using singularities and power geometry

European Physical Journal C: Particles and Fields, 2019
We introduce a novel approach for solving the problem of identifying regions in the framework of Method of Regions by considering singularities and the associated Landau equations given a multi-scale Feynman diagram.
B. Ananthanarayan, Abhishek Pal, S. Ramanan, Ratan Sarkar   +3 more
doaj   +1 more source

Modulating D33 Coefficients Through In Situ AgF and Ag2O Growth in PVDF Composites for High‐Performance Piezoelectric Nanogenerators

Advanced Materials Technologies, EarlyView.
In situ, nanoparticle doping enhances the piezoelectric coefficient (**d₃₃**) of PVDF to ≈12 pC/N, while in situ growth of AgF and Ag₂O dopants increases β‐phase concentration. The nanogenerator achieves a 35 V open‐circuit voltage and 1.6 µA short‐circuit current, powering 10 blue LEDs and charging a 50 nF capacitor within 10 s.
Renjun Liu, Ki Hoon Shin, Yu Zhu, Qing Liu, Bing Ji, Guoxing Sun, Zongjin Li, Dadimuni De Silva, Aisling Stewart, Matteo Lorenzoni, Ingo Ludtke, Oliver A. Williams, Wenlong Ming, Giorgio Divitini, Jung Inn Sohn, Bo Hou   +15 more
wiley   +1 more source

Building Scalable Silicon Microring Resonator‐Based Neuromorphic Photonic Circuits Using Post‐Fabrication Processing with Photochromic Material

Advanced Optical Materials, EarlyView.
One of the high‐impact research goals in neuromorphic photonics is to build scalable photonic artificial intelligence computing at high energy efficiency. This perspective paper discusses microring resonator (MRR)‐based large‐scale photonic neural networks, variations of MRR resonance wavelength from fabrication, and post‐fabrication processing with ...
Lei Xu, Jiawei Zhang, Eli A. Doris, Simon Bilodeau, Jesse A. Wisch, Manting Gui, Yusuf O. Jimoh, Bhavin Shastri, Barry P. Rand, Paul R. Prucnal   +9 more
wiley   +1 more source

Structurally Defined Water‐Soluble Metallofullerene Derivatives towards Biomedical Applications

Angewandte Chemie International Edition, Volume 62, Issue 3, January 16, 2023., 2023
A modular metallobuckytrio (MBT) platform provides a family of structurally defined, water‐soluble metallofullerene derivatives that can safely carry rare‐earth elements in tailorable molecules, showing promise in biomedicines including MRI contrast agents and photosensitizers. Abstract Endohedral metallofullerenes (EMFs) are excellent carriers of rare‐
Yanbang Li, Rohin Biswas, William P. Kopcha, Thierry Dubroca, Laura Abella, Yue Sun, Ryan A. Crichton, Christopher Rathnam, Letao Yang, Yao‐Wen Yeh, Krishnendu Kundu, Antonio Rodríguez‐Fortea, Josep M. Poblet, Ki‐Bum Lee, Stephen Hill, Jianyuan Zhang   +15 more
wiley   +1 more source

Strategic Plan for Astronomy in the Netherlands 2011-2020 [PDF]

arXiv, 2012
Strategic Plan for Astronomy in the Netherlands 2011 - 2020, written by the Netherlands Committee for Astronomy (NCA), on behalf of the excellence research school in astronomy NOVA, (combining the university astronomy institutes of the universities of Amsterdam, Groningen, Leiden and Nijmegen), the NWO division of Physical Sciences, the Netherlands ...
arxiv  

Enhancing the Efficiency of Polariton OLEDs in and Beyond the Single‐Excitation Subspace

Advanced Optical Materials, EarlyView.
Organic light‐emitting diodes (OLEDs) are transforming lighting with eco‐friendly manufacturing and flexible applications. However, since 75 % of excited states (triplets) are non‐emissive, recent research has focused on triplet harvesting. This work proposes a predictive polariton‐based model, exploring conditions for OLED enhancement and showing that
Olli Siltanen, Kimmo Luoma, Andrew J. Musser, Konstantinos S. Daskalakis   +3 more
wiley   +1 more source