Results 61 to 70 of about 988,622 (290)
, 2004 We consider the quantum treatment of the rolling tachyon background describing the decay of D-branes in the limit of weak string coupling. We focus on the propagation of an open string in the fluctuating background and show how the boundary string action
Ambjørn +12 more
core +1 more source
Transfer of Energy and Momentum Between Magnetoactive Surface Microstructure and a Solid Object
Advanced Engineering Materials, EarlyView.We demonstrate that magnetoactive multilamellar arrays subjected to a rotating magnetic field can function as platforms for controlled transport of physical objects. Through systematic experimental investigation, we elucidate the underlying physical mechanisms determining the upper limit of the achievable transportation speed in such magnetic “conveyor‐
Arne Geldof +9 more
wiley +1 more source
Scientific ReportsThe lockbolt structure is essential in railway wagons, and a scientific lockbolt layout can ensure uniform load distribution, thereby preventing failure. However, current engineering lacks layout optimization methods that address multidimensional failure
Dailin Zhang +5 more
doaj +1 more source
Index on Censorship, 2001 Vladimir Bukovsky was first arrested in 1963 for the possession of anti-Soviet literature and interned in a special psychiatric hospital for 14 months. In 1965, he was rearrested for co-organising a Moscow human rights demonstration in defence of writers Andrei Sinyavsky and Yulii Daniel, and sent to a series of mental hospitals.
openaire +1 more source
The influence of heterogenous porosity on silicon nitride/steel wear in lubricated rolling contact [PDF]
, 2000 Heterogeneous porosity is detected on the surface and subsurface of hot isostatically pressed (HIPed) silicon nitride spherical rolling elements. The extent of the localised porosity accounts for an area of 6% of the rolling element surface and 4% of the
Hadfield, M, Kang, J
core
Poisson structures for reduced non-holonomic systems
, 2004 Borisov, Mamaev and Kilin have recently found certain Poisson structures with respect to which the reduced and rescaled systems of certain non-holonomic problems, involving rolling bodies without slipping, become Hamiltonian, the Hamiltonian function ...
Arturo Ramos +23 more
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Advanced Engineering Materials, EarlyView.Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm +5 more
wiley +1 more source
Journal of Materials Research and TechnologyA new weathering steel suitable for low salinity conditions was developed in this paper. The corrosion evolution of test steel under simulated tropical marine atmosphere was studied by alternating dry/wet corrosion tests, electrochemical techniques ...
Changyou Zhu +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar +8 more
wiley +1 more source
Key Intelligent Technology of Steel Strip Production through Process
Metals, 2018 Because of the complexity of procedure interface and working conditions, the further improvement of steel strip quality and production efficiency is limited.
Jie Sun +4 more
doaj +1 more source