Search results for "Planar"

showing 2 items of 412 documents

Tractional Motion Machines extend GPAC-generable functions

2012

In late 17th century there appeared the Tractional Motion instruments, mechanical devices which plot the curves solving differential equations by the management of the tangent. In early 20th century Vannevar Bush’s Differential Analyzer got the same aim: in this paper we’ll compare the Differential Analyzer mathematical model (the Shannon’s General Purpose Analog Computer, or GPAC) with the Tractional Motion Machine potentials. Even if we will not arrive in defining the class of the functions generated by Tractional Motion Machines, we’ll see how this class will strictly extend the GPAC-generable functions.

tractional motionlinkagesAnalog computationGPACnonholonomic constraintsAnalog computation; tractional motion; GPAC; computable functions; planar mechanisms; linkages; nonholonomic constraintscomputable functionsplanar mechanismsAnalog computation tractional motion GPAC computable functions planar mechanisms linkages nonholonomic constraints
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Effect of Boron Doping on the Wear Behavior of the Growth and Nucleation Surfaces of Micro- and Nanocrystalline Diamond Films

2016

B-doped diamond has become the ultimate material for applications in the field of microelectromechanical systems (MEMS), which require both highly wear resistant and electrically conductive diamond films and microstructures. Despite the extensive research of the tribological properties of undoped diamond, to date there is very limited knowledge of the wear properties of highly B-doped diamond. Therefore, in this work a comprehensive investigation of the wear behavior of highly B-doped diamond is presented. Reciprocating sliding tests are performed on micro- and nanocrystalline diamond (MCD, NCD) films with varying B-doping levels and thicknesses. We demonstrate a linear dependency of the we…

wearMaterials sciencereciprocating slidingMaterial properties of diamondta221diamond filmsNucleation02 engineering and technologyengineering.material01 natural sciencesnucleation surfaceChemical-mechanical planarization0103 physical sciencesboron dopingGeneral Materials Scienceta116Elastic modulus010302 applied physicsta114MetallurgyDiamondTribology021001 nanoscience & nanotechnologyMicrostructureCarbon filmengineeringplanarization0210 nano-technologyACS Applied Materials & Interfaces
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