Space systems. Space environment (natural and artificial). Observed proton fluences over long duration at GEO and guideline for selection of confidence level in statistical model of solar proton fluences

2011 ◽  
Keyword(s):  
Statistical Model ◽  
Confidence Level ◽  
Solar Proton ◽  
Space Environment ◽  
Space Systems ◽  
Long Duration ◽  
Selection Of

scholarly journals Self-healing materials for space applications: overview of present development and major limitations

2021 ◽  
Author(s):  
Laura Pernigoni ◽  
Ugo Lafont ◽  
Antonio Mattia Grande
Keyword(s):  
Orbital Debris ◽  
Space Environment ◽  
Technological Evolution ◽  
Self Healing ◽  
Space Systems ◽  
Space Applications ◽  
Structural Fatigue ◽  
Operational Life ◽  
Technological Limitations ◽  
Human Exploration

AbstractIn the last decade, self-healing materials have become extremely appealing for the field of space applications, due to their technological evolution and the consequent possibility of designing space systems and structures able to repair autonomously after damage arising from impacts with micrometeoroids and orbital debris, from accidental contact with sharp objects, from structural fatigue or simply due to material aging. The integration of these novel materials in the design of spacecraft structures would result in increased reliability and safety leading to longer operational life and missions. Such concepts will bring a decisive boost enabling new mission scenario for the establishment of new orbital stations, settlement on the Moon and human exploration of Mars.The proposed review aims at presenting the newest and most promising self-healing materials and associated technologies for space application, along with the issues related to their current technological limitations in combination with the effect of the space environment. An introductory part about the outlooks and challenges of space exploration and the self-healing concept is followed by a brief description of the space environment and its possible effects on the performance of materials. Self-healing materials are then analysed in detail, moving from the general intrinsic and extrinsic categories down to the specific mechanisms.

Features of Solar Proton Events and Long-Duration Gamma-Ray Flares in the 24th Solar Cycle

2021 ◽  
Vol 85 (8) ◽  
pp. 911-914
Author(s):  
G. A. Bazilevskaya ◽  
E. I. Daibog ◽  
Yu. I. Logachev ◽  
N. A. Vlasova ◽  
E. A. Ginzburg ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Gamma Ray ◽  
Solar Proton ◽  
Long Duration ◽  
Solar Proton Events

Understanding Nasheed for Learning Strategy in Islamic Education

2020 ◽  
pp. 205-218
Author(s):  
Muhammad Talhah Ajmain ◽  
Jimaain Safar ◽  
Ahmad Kilani Mohamed ◽  
Miftachul Huda
Keyword(s):  
21St Century ◽  
Teaching Methods ◽  
Confidence Level ◽  
Teaching And Learning ◽  
Learning Strategy ◽  
Good Alternative ◽  
Islamic Education ◽  
High Interest ◽  
Teaching Objectives ◽  
Selection Of

Nashid is one of various teaching methods and facilitator (PdPc). Teenagers nowadays are full of interest in entertainment in the form of songs and singing, and a good alternative is to bring them to God. Thus, this paper will be debating nashid as medium of education and missionary, nashid as a method of teaching and facilitating, the effectiveness of the method, and its implementation in teaching and learning. Aspects of creativeness in education are required in the 21st century. Nashid method is able to help students memorize facts and important things, strengthen memory, create high interest, build excitement, improve motivation and concentration, and enhance the confidence level among students. It will bring about a holistic student. However, the selection of the appropriate nashid must be considered to make sure the teaching objectives are achieved. Thus, teachers in Islamic teaching must look at this method as one of the important methods and apply it in their teaching and facilitating process.

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