Results 71 to 80 of about 24,274,927 (400)

Dual VHF Stratospheric–Tropospheric Radar Measurements in the Lower Atmosphere

Remote Sensing
Radar observations of tropospheric and lower-stratospheric winds and density-normalized momentum flux made in northern Germany with two 53.5 MHz VHF MST radars over a period of one week in August 1986 are presented.
Iain M. Reid, Rüdiger Rüster, Peter Czechowsky, Gerhard Schmidt   +3 more
doaj   +1 more source

The Kalmag model as a candidate for IGRF-13

Earth, Planets and Space, 2020
We present a new model of the geomagnetic field spanning the last 20 years and called Kalmag. Deriving from the assimilation of CHAMP and Swarm vector field measurements, it separates the different contributions to the observable field through ...
Julien Baerenzung, Matthias Holschneider, Johannes Wicht, Vincent Lesur, Sabrina Sanchez   +4 more
doaj   +1 more source

Poly(1,4‐anthraquinone) as an Organic Electrode Material: Interplay of the Electronic and Structural Properties due to the Unusual Lone‐Pair‐π Conjugation

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
In this study, the unique role of the unusual lone‐pair‐π conjugation mechanism in poly(1,4‐anthraquinone) (P14AQ) is explored as an organic electrode material. Unlike traditional π‐π interactions, P14AQ's conjugation involves lone pairs of oxygen atoms interacting with the π cloud of adjacent units, enabling stable charge transport even with minimal π‐
Xiaotong Zhang, Piotr de Silva
wiley   +1 more source

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

Advanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu, Jochen Vanderspikken, Paola Mantegazza, Stefania Moro, Mouna Hamid, Sigurd Mertens, Niko Van den Brande, Laurence Lutsen, Vincent Lemaur, David Beljonne, Giovanni Costantini, Koen Vandewal, Bruno Van Mele, Wouter Maes, Bart Goderis   +14 more
wiley   +1 more source

Exploring the solar system [PDF]

, 1964
Nasa programs for solar activity and radiation ...

core   +1 more source

Review: A Coherent and Comprehensive Model of the Evolution of the Outer Solar System [PDF]

, 2010
Since the discovery of the first extra-solar planets, we are confronted with the puzzling diversity of planetary systems. Processes like planet radial migration in gas-disks and planetary orbital instabilities, often invoked to explain the exotic orbits ...
Adams, Alessandro Morbidelli, Augereau, Batygin, Bottke, Brasser, Chiang, Chiang, Dones, Duncan, Fernandez, Gomes, Gomes, Gomes, Hahn, Heppenheimer, Jewitt, Kenyon, Kortenkamp, Lagrange, Levison, Levison, Levison, Marzari, Masset, Michtchenko, Morbidelli, Morbidelli, Morbidelli, Morbidelli, Morbidelli, Nesvorný, O'Brien, Pierens, Thommes, Tsiganis, Walsh, Weidenschilling, Wetherill, Youdin, Ćuk   +40 more
core   +5 more sources

Solar Tracking System

International Journal for Research in Applied Science and Engineering Technology
: The usage of solar panels to convert solar energy into electrical energy has gr own in recent years. The solar panel can be utilized as a huge solar system that is connected to the electrical grids or as a standalone system.
Jayesh Daud
semanticscholar   +1 more source

James Webb Space Telescope Observations of Stellar Occultations by Solar System Bodies and Rings [PDF]

Publications of the Astronomical Society of the Pacific, 2015
In this paper, we investigate the opportunities provided by the James Webb Space Telescope (JWST) for significant scientific advances in the study of Solar System bodies and rings using stellar occultations.
P. Santos-Sanz, R. French, N. Pinilla-Alonso, J. Stansberry, Z.-Y. Lin, Z. Zhang, E. Vilenius, T. Muller, J. Ortiz, F. Braga-Ribas, A. Bosh, R. Duffard, E. Lellouch, G. Tancredi, L. Young, S. Milam, the Jwst occultations focus group. Instituto de Astrof Andaluc'ia, Iaa-Csic, Glorieta de la Astronom'ia, Granada, Spain., D. O. Astronomy, Wellesley College, Usa, D. O. Earth, Planetary Sciences, U. Tennessee, Knoxville, Tn, Space Telescope Science Institute, Baltimore., Md, I. O. Astronomy, National Central University, Taiwan, Astrophysics, A. Sinica, M. F. P. Physics, Garching, H Germany, Max Planck Institute for Solar System Research, Gottingen, Federal University of Technology - Paran'a, Curitiba, Brazil, Atmospheric, Mit, Cambridge, Ma, L. Paris, Cnrs, 6. UPMCUniv.Paris, Univ. Paris-Diderot, Meudon, France., D. D. Astronom'ia, F. Ciencias, Montevideo, Uruguay., SwRI, 1050 Walnut St., Boulder, CO 80302-5150, Nasa Goddard Space Flight Center, Greenbelt   +64 more
semanticscholar   +1 more source

Hydrogel‐Based Photothermal‐Catalytic Membrane for Efficient Cogeneration of Freshwater and Hydrogen in Membrane Distillation System

Advanced Functional Materials, EarlyView.
This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun, Muhammad Usman Farid, Wenlong Xi, Gang Lu, Min Wei Boey, Sai Kishore Ravi, Patrick H.‐L. Sit, Alicia Kyoungjin An   +7 more
wiley   +1 more source

Understanding the secular variability of solar irradiance: the potential of Ca II K observations

Journal of Space Weather and Space Climate
With the increasing concern about climate change, it is important to have accurate information on the individual contributions by the potential driving agents, solar variability being one of them.
Chatzistergos Theodosios, Krivova Natalie A., Ermolli Ilaria   +2 more
doaj   +1 more source