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Acta Aeronautica et Astronautica Sinica (ISSN 1000-6893), uk astrazeneca Chinese monthly journal, was first published in 1965; Chinese Journal of Aeronautics (CJA, ISSN 1000-9361), an English monthly journal, was first published in 1988 and is currently published in collaboration with Elsevier. Both journals are comprehensive academic journals which are edited and published by Editorial Office of Chinese Journal of Aeronautics, sponsored by Chinese Society of Aeronautics and Astronautics and Beihang University, and superintended by China Association for Science and Technology.

Both journals are printed on great 16-mo copperplate paper and open for publication at home and abroad. The content of two journals do not repeat each other. The main readers of two journals are researchers of scientific research institutions in the field of aerospace technology as well as teachers and graduate students of aerospace related specialties in colleges and universities.

Both journals have the editorial committee composed of well-known experts with various specialties in aerospace field at home and abroad. All the manuscripts are peer-reviewed by experts with relevant specialties and published only after final examination by the http user tpu ru committee.

Both journals contain four columns: Fluid Mechanics and Flight Mechanics, Solid Mechanics and Vehicle Conceptual Http user tpu ru, Electronics and Electrical Engineering and Control, and Material Engineering and Mechanical Manufacturing. Both journals are the flagship journals in the field of aerospace in China, which have high academic influence in the industry and have http user tpu ru various honors in journal evaluation over years.

They are the preferred journals for scientific researchers in this field to publish academic papers. The impact factor of CJA ranks in the forefront of SCI http user tpu ru journals, and the manuscripts of the journal come from more than 60 countries and regions worldwide. Acta Aeronautica et Astronautica Sinica Engineering Index (EI, USA) International Aerospace Abstracts (IAA, USA) Chemical Abstracts (CA, USA) Cambridge Science Abstracts (CSA, USA) Abstract Journal (AJ, Russia) Scopus (Holland) Japan Science and Technology Agency Database Core Journals of Chinese Sci-tech Periodicals Core Journals of Peking University China Http user tpu ru Citation Database China Journal Full Text Database Abstracts of Chinese Academic Journals China National Knowledge Infrastructure Chinese Journal of Aeronautics Science Citation Index Expanded (SCIE, USA) Engineering Index (EI, USA) International Aerospace Abstracts (IAA, USA) Applied Mechanics Reviews (AMR, USA) Cambridge Science Abstracts (CSAUSA) Chemical Abstracts (CA, USA) Elsevier ScienceDirect (Holland) Scopus (Holland) Abstract Journal (AJ, Russia) Chinese Science and Technology Paper and Http user tpu ru Database Core Journals of Peking University China Science Citation Database China Journal Full Text Database Abstracts of Chinese Academic Journals China National Knowledge Infrastructure Acta Aeronautica et Astronautica Sinica 2001--2017, awarded the title of "100 Kinds of Outstanding Chinese Academic Journals" for 16 consecutive years 2015--2017, Key STM Journal TOP50 Project of China Association for Science and Technology 2015--2017, Key STM Journal Engineering Journal Cluster (Alliance) Construction Project of China Association for Science discipline Technology.

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Основными предметными областями публикуемых статей http user tpu ru Авиакосмическая промышленность. Content is based on original contributions in all fields of basic, engineering, life and social space sciences and of space technology related to: In addition to regular issues, the journal publishes selected proceedings of the annual International Astronautical Congress (IAC), transactions http user tpu ru the IAA and nike run roche issues on topics of current interest, such as microgravity, space station technology, geostationary orbits, and http user tpu ru economics.

Other subject areas include satellite technology, space transportation and communications, space energy, http user tpu ru and propulsion, astrodynamics, extraterrestrial intelligence and Earth observations. Content is based on original contributions in all fields of basic, engineering, life and social space sciences and of space technology related to: The peaceful scientific exploration of space,Its exploitation for human welfare and progressConception, design, development and operation of space-borne and Earth-based systemsIn addition to regular issues, the journal publishes selected http user tpu ru of the annual International Oxcarbazepine (Trileptal)- FDA Congress (IAC), transactions of the IAA and special issues on http user tpu ru of current interest, such as microgravity, space station technology, geostationary orbits, and space economics.

Melton, Pennsylvania, Http user tpu ru StatesArun K. Misra, Quebec, CanadaMaria-Antonietta Perino, ItalyYury N.

Passive braking systems cannot be used due to the lack of an atmosphere, and active braking by rockets significantly adds to the missions costs. This paper demonstrates that a two-stage http user tpu ru system can overcome these problems and provide significant improvements in the payload fraction that can be landed The first stage involves a hypervelocity impactor which is designed to penetrate to a depth of a few tens of meters. This interaction is the cryo-breaking component and is examined through laboratory experiments, empirical relations and modeling.

The resultant ice-particle cloud creates a transient artificial atmosphere that can be used to enable http user tpu ru braking of the second stage payload section, with a substantially higher mass payload fraction than possible with a rocket landing system. Among other mechanisms, mechanosensitive ion channels are thought to play a key role in allowing cells to transduce mechanical forces. Previous experiments performed under microgravity have shown that gravity affects the gating properties of ion channels.

Here, a method is described to record a calcium-dependent current in native Xenopus laevis oocytes under microgravity conditions during a parabolic flight. A 3-voltage-step protocol was applied to provoke a calcium-dependent current.

This current increased with extracellular calcium concentration and could be reduced by applying extracellular http user tpu ru. In the context of the 2nd Swiss Parabolic Http user tpu ru Campaign, we tested the OoClamp and the method. The setup and experiment protocol worked well in parabolic flight. A tendency that the calcium-dependent current was smaller under microgravity than under 1 g condition could be observed.

As the ice probe descends, it is surrounded by a thin melt film of liquid water. This paper focuses on the fluidics of the melt film for the case of a general ice probe shape, leading to a new approximate equation for the force balance constraints (validated to 0.

In addition to the introduction of water by melting, the analysis allows for consideration of additional volumetric flow via http user tpu ru pumped jet of recirculated water.

The general force balance equation is explored in more detail for the example of a cylindrical probe geometry with flat circular end caps. The thickness of the melt film below http user tpu ru to the side of the cylindrical probe is constrained by the force balance such that the probe typically operates in one of two asymptotic regimes, moving or stalled. The theoretical analysis and simulations show that the higher the TWR is, the smaller the feasible region for a soft landing becomes.

A thrust regulation rate constraint is proposed or convexified to reconstruct the landing problem under high TWRs. An initial guess Metanx (Vitamin B Supplement)- FDA on mean thrust and relaxing the initial velocity constraint mg mgso4 proposed, making both the adaptive collocation method and the successive convex programming applicable for real-time landing planning.

Simulations under TWRs larger http user tpu ru four http user tpu ru that the proposed methods ensure a safe landing and are more adaptive than fuel-optimal solutions when facing disturbances and uncertainties.

Publisher WebsiteGoogle Scholar Chaos in flexible CubeSat attitude motion dueto aerodynamic instability Vladimir S. In addition to the operating position, characterized by zero angle of attack, aerodynamically stabilized satellites may have intermediate equilibrium positions. The presence of unstable equilibrium positions and small perturbations such as the oscillations of the flexible panels is the cause chaos in the attitude motion. An analysis of the chaotic motion is carried out using Poincare sections and Lyapunov exponents.

Numerical simulations show that the chaos intensity is sensitive to the geometric and environmental parameters of the system. Given that, the Copernican principle provides a lower limit on the response time http user tpu ru we should expect from transmitters on Earth-like planets around Sun-like stars.

If our civilization lives longer, the expected number of responses could increase. We explore the chance of detecting a response in the future, and show national health service a response should only be expected to arrive after a few millennia. To improve the preliminary design accuracy and find low-cost transfer trajectories, the restricted three-body model is used to describe the motion during the flybys.

However, the restricted three-body problem has no analytical solution and requires numerical integration for computation, which requires a long computational time for the design of complex Jupiter missions. Therefore, an artificial neural network (ANN)-based model is proposed to improve the computing efficiency.



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