A copy of Guangbo jiemu bao [Broadcast Program Report] was being passed from hand to hand among a group of young people eager to be the first to read the article introducing the program "What Is Revolutionary Love?" It said: "… Young friends, you are certainly very concerned about this problem'. So, we would like you to meet the young women workers Meng Xiaoyu and Meng Yamei and the older cadre Miss Feng. They are the three leading characters in the short story ‘The Place of Love.’ Through the description of the love lives of these three, the story induces us to think deeply about two questions that merit further examination.

This is How the Discussion Started

This paper deals with the general problem of space vehicle dynamics and control It presents the various approaches of this problem in a rather unified manner; the classical simplifying assumptions are curefully pointed out

Spacecraft dynamics and control

Preface 1. Basic principles of the ionosphere 2. Geophysical phenomena influencing the high-latitude ionosphere 3. Fundamentals of terrestrial radio propagation 4. Radio techniques for probing the ionosphere 5. The high-latitude F region and the trough 6. The aurora, the substorm and the E region 7. The high-latitude D region 8. High-latitude radio propagation: part I - fundamentals and early results 9. High-latitude radio propagation: part II - modeling, prediction and mitigation of problem Appendix: some books for general reading Index.

The high-latitude ionosphere and its effects on radio propagation: Fundamentals of terrestrial radio propagation

Polyvinyl alcohol (PVA) and Chitosan (CS)-based novel composites were prepared using solution casting technique by introducing graphite oxide (GO) and nickel oxide (NiO) as nanofillers. The structural, thermal and mechanical properties of PVA/CS/GO/NiO nanocomposites were investigated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The dielectric and electromagnetic interference (EMI) shielding properties of synthesized nanocomposites were also investigated. The addition of dual nanofillers in the PVA/CS blend resulted in improved thermal stability of nanocomposites through the interaction of nanofillers with OH groups of polymer matrices. The DMA results displayed higher storage and loss modulus at low temperature for nanocomposite with 1.5/15 wt% of GO/NiO loading. The maximum values of dielectric constant and dielectric loss obtained are 1315.5 and 11.1 at the low-frequency region, respectively. The absorption dominated EMI shielding effectiveness (SE) was observed with a maximum EMI SE value of 12 dB for nanocomposite film containing 3.0/30 wt% of GO/NiO as compared to EMI SE value of 0.3 dB for PVA/CS blend in Ku-band (12–18 GHz) region. The electrical network formation by GO and NiO in the polymer matrix resulted in an improved EMI SE which further emphasizes the potential use of these nanocomposite films as an effective EMI shielding material.

Structural, dielectric and EMI shielding properties of polyvinyl alcohol/chitosan blend nanocomposites integrated with graphite oxide and nickel oxide nanofillers

The emission of energetic particles from the Sun is one of the major manifestations of high energy astrophysics and is related to a variety of astrophysical and geophysical phenomena in the heliosphere. An event of solar energetic particles (SEP) is seen as a sudden rise of the counting rate of the background galactic cosmic rays reaching a high value in a few minutes, as measured by ground level or spacecraft borne detectors. The counting rate i.e. the intensity reaches a maximum value which may be 10 to 100 times more than the background level in small and medium events and may be more than 1000 times more in large events. Following the maximum the intensity slowly decreases compared to the background during a few hours in an average event and in a day or so in case of a very large event. A day or two after the optical flare and the solar energetic particle (SEP) event, the plasma cloud emitted by the Sun reaches the earth and causes a magnetic storm and Forbush decrease in the galactic cosmic ray intensity (Chapter 3.5). In contrast to the solar wind and plasma clouds from the Sun which contain protons with energies of 1 to 10 keV, SEP events have protons with energies of 10 MeV to 100 MeV in average events and up to 1 to 10 GeV or more in large events. As these energies overlap the proton energies of galactic cosmic rays, these SEP events are also called solar cosmic ray (SCR) events by some authors.

Solar Energetic Particles

/pdf/the-impact-of-space-radiation-environment-on-satellites-2ddamjiwqt.pdf

The Impact of Space Radiation Environment on Satellites Operation in Near-Earth Space

Effects of plasma drag on low Earth orbiting satellites due to solar forcing induced perturbations and heating

/pdf/probing-geomagnetic-storm-driven-magnetosphere-ionosphere-2g0rkoybre.pdf

Probing geomagnetic storm-driven magnetosphere–ionosphere dynamics in D-region via propagation characteristics of very low frequency radio signals

https://www.jstage.jst.go.jp/article/tastj/12/0/12_TJSAS-D-13-00067/_pdf

Victor U. J. Nwankwo

Papers

The Impact of Space Radiation Environment on Satellites Operation in Near-Earth Space

Effects of plasma drag on low Earth orbiting satellites due to solar forcing induced perturbations and heating

Probing geomagnetic storm-driven magnetosphere–ionosphere dynamics in D-region via propagation characteristics of very low frequency radio signals

Theoretical Model of Drag Force Impact on a Model International Space Station Satellite due to Solar Activity

Effects of space weather on the ionosphere and LEO satellites' orbital trajectory in equatorial, low and middle latitude