The ultra-lightweight construction of large, deployable space structures is a fundamental prerequisite for the realization of Solar Sail propulsion concepts. In addition to the functionality of the deployment technique and the development of control concepts, lightweight aspects and their technical implementation play a key role in future Solar Sail missions. A further development of the set-up...

Up to now, most of the research efforts to improve performance of programs based on hardware transactions were devoted to designing new hybrid transactional memories and transactional lock elision algorithms to speedup software fallback paths. Unfortunately hardware transactions remain insufficiently exploited, limited especially on microarchitectures where the access set is particularly limite...

Recently, several uses for intercraft Coulomb forces have been explored. Proposed applications have ranged from creating static formations of many spacecraft to steerable nanosat deployment systems. This paper considers the use of Coulomb forces for creating space structures. Unlike conventional space structures, these ”virtual space structures” have no physical connections. Instead, they are h...

In this paper, using vortex blob method (VBM), turbulent flow in a channel is studied and physical concepts of turbulence are obtained and discussed. At first, time-averaged velocities,  and , and then their fluctuations are calculated. To clarify turbulence structures, velocity fluctuations and  are plotted. It is observed that turbulence structures occupy different positions and move with con...

Damage assessment is one of the crucial topics in the operation of structures. Multiplicities of structural elements and joints are the main challenges about damage assessment of space structure. Vibration-based damage evaluation seems to be effective and useful for application in industrial conditions and the low-cost. A method is presented to detect and assess structural damages from changes ...

The reed structure is the key component in foldable space deployment mechanism. In aerospace industry, weight loss occupies a pivotal position. use of lightweight can achieve significant savings launch costs and improve load efficiency. Aiming at requirements mechanism, this paper discusses substitution effect honeycomb topology on structure. Firstly, column equivalent to an orthotropic cylindr...

in this paper, we introduce the concept of dynamical distance on a nuclear con- guration space. we partition the nuclear con guration space into disjoint classes. this clas-si cation coincides with the classical partitioning of molecular systems via the concept ofconjugacy of dynamical systems. it gives a quantitative criterion to distinguish dierentmolecular structures.

The xed point result in Mustafa-Sims metrical structures obtained by Karapinar and Agarwal[Fixed Point Th. Appl., 2013, 2013:154] is deductible from a corresponding one stated in terms ofanticipative contractions over the associated (standard) metric space.

Deterring the optimum design of large-scale structures is a difficult task. Great number of design variables, largeness of the search space and controlling great number of design constraints are major preventive factors in performing optimum design of large-scale truss structures in a reasonable time. Meta-heuristic algorithms are known as one of the useful tools to d...