Results 41 to 50 of about 21,011,246 (298)

The Early Evolution of the Solar System [PDF]

International Astronomical Union Colloquium, 1971
The problems of relating collapse conditions in an interstellar cloud to a model of the primitive solar nebula are discussed. In such a nebula there is a radial force balance between gravity, the pressure gradient, and centrifugal forces due to the rotation.
openaire   +1 more source

Self‐Regulated Learning Meets AI: Reinterpreting Self‐Regulation, Co‐Regulation, and Socially Shared Regulation in Human–AI Interaction

New Directions for Adult and Continuing Education, EarlyView.
ABSTRACT Advancing artificial intelligence (AI) has transformed learning and work, yet higher education and professional development programs have not systematically equipped learners for AI‐prevalent environments. This lack of preparation creates uncertainty regarding control, responsibility, trust, and accountability.
Moon‐Heum Cho, Jerusalem Merkebu
wiley   +1 more source

Solar evolution and extrema: current state of understanding of long-term solar variability and its planetary impacts

Progress in Earth and Planetary Science, 2021
The activity of stars such as the Sun varies over timescales ranging from the very short to the very long—stellar and planetary evolutionary timescales.
Dibyendu Nandy, Petrus C. H. Martens, Vladimir Obridko, Soumyaranjan Dash, Katya Georgieva   +4 more
doaj   +1 more source

Dynamical age of solar wind turbulence in the outer heliosphere [PDF]

, 1998
In an evolving turbulent medium, a natural timescale can be defined in terms of the energy decay time. The time evolution may be complicated by other effects such as energy supply due to driving, and spatial inhomogeneity.
Matthaeus, William H., Oughton, Sean, William H. Matthaeus, Smith, Charles W., Charles W. Smith, Sean Oughton   +5 more
core   +1 more source

Self‐Cleaning Sensor Surfaces for Long‐Term Environmental Monitoring

Advanced Engineering Materials, EarlyView.
Long‐term use of unattended outdoor sensors without soiling or biofouling is achieved through generation of a micro‐ and nanorough cuvette surface by combing hydrophobic nanoparticles with fluorinated polymers, crosslinked and surface‐attached through CHic chemistry. The coating demonstrates self‐cleaning behavior and prolonged outdoor stability, which
Sanam Kumari Rajak, Yasmina Frey, Ulrike Wallrabe, Oswald Prucker, Jürgen Rühe   +4 more
wiley   +1 more source

Planetary Formation Constrained by Collisions between Millimeter-sized Lunar Particles and Lunar Surface from Chang’E-4 Mission

The Astrophysical Journal
Exploring low-velocity collisions is crucial for unraveling intricate processes in planetary formation, particularly the bouncing barrier that impedes the aggregation of dust into sizable planetesimals.
Lei Lei, Xiaoping Zhang, Pengwei Luo, Guozheng Zhang, Jilin You, Jiahui Liu, Yanyan Xu, Shuai Fu, Xiongyao Li, Zhiguo Meng, Cunhui Li, Haiyan Zhang, Yunzhao Wu   +12 more
doaj   +1 more source

Research progress on internal characteristics of asteroids and comets: implications of Tianwen-2 radar observations

Earth and Planetary Physics
Asteroids and comets, which have long been of interest to astronomers, are important components of the solar system. They contain rich primitive information about the early solar system, which provide a unique pathway for studying the formation and ...
ShiBang Du, ChunYu Ding, Yan Su, JiaWei Li, Shun Dai, Ravi Sharma, YuXiao Zhi, JiangWan Xu, XiaoHang Qiu, ZhongHan Lei, ChangZhi Jiang, HaoYu Chen, ZiHang Liang   +12 more
doaj   +1 more source

Non-dominated sorting culture differential evolution algorithm for multi-objective optimal operation of Wind- Solar-Hydro complementary power generation system

Global Energy Interconnection, 2019
Due to the intermittency and instability of Wind-Solar energy and easy compensation of hydropower, this study proposes a Wind-Solar-Hydro power optimal scheduling model.
Guanjun Liu, Hui Qin, Rui Tian, Lingyun Tang, Jie Li   +4 more
doaj   +1 more source

Radial evolution of cross helicity at low and high latitudes in the solar wind [PDF]

, 2005
We employ a turbulence transport theory to the radial evolution of the solar wind at both low and high latitudes. The theory includes cross helicity, magnetohydrodynamic (MHD) turbulence, and driving by shear and pickup ions. The radial decrease of cross
Matthaeus, William H., Oughton, Sean, Bavassano, B., Minnie, J., Bieber, J.W., Parhi, S., Breech, Ben   +6 more
core  

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source