The conceptual ability to source, combine, and store substances that enhance technology or social practices represents a benchmark in the evolution of complex human cognition. Excavations in 2008 at Blombos Cave, South Africa, revealed a processing…
Papers in Testing
Testing papers in Materials Science, A
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Magnetostrain is achieved by twin boundary motion in magnetic shape memory materials. A 1% strain could be achieved in textured polycrystals of Ni-Mn-Ga at room temperature. Ni50Mn29Ga21 was directionally solidified in order to obtain a texture…
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The ability to utilize very high sheet resistivities is one of the advantages of using thin film resistors on silicon integrated circuits. This paper discusses a process which produces a film having a sheet resistivity of 2500 &937;/&9633;. an order…
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Overthe past twenty years, computer-based simulation codes have emerged asthe leading tools to assess risks of severe events suchas fire. The results of such simulation codes are usuallyused to estimate the magnitude, frequency and consequence of…
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Overthe past twenty years, computer-based simulation codes have emerged asthe leading tools to assess risks of severe events suchas fire. The results of such simulation codes are usuallyused to estimate the magnitude, frequency and consequence of…
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Overthe past twenty years, computer-based simulation codes have emerged asthe leading tools to assess risks of severe events suchas fire. The results of such simulation codes are usuallyused to estimate the magnitude, frequency and consequence of…
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The magnetic field-induced (MFI) changes of the electronic, magnetic and phonon properties of magnetic shape memory Heusler alloys Ni?Mn?Ga and Ni?Mn?In are discussed on the basis of first-principles calculations. Without an external magnetic field,…
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We report a detailed ab initio study for body-centered-cubic (bcc) Ta within the framework of the quasiharmonic approximation (QHA) to refine its thermal equation of state and thermodynamic properties. Based on the excellent agreement of our…
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Abnormal growth of giant grains in the millimeter range was observed in silver thin films with thicknesses of 2.0 and 2.4 μm. The effect depends on deposition temperature and deposition geometry. The microstructure and texture of as-deposited and…
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The elimination of dark stains of biological origin is a very difficult conservation operation when no harmful side effects are acceptable for the substrate. This situation was encountered during conservation work on the cloister of the JerÛnimos…
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The connection between parameters that can be measured by means of instrumented indentation with the real mechanical properties has been a matter of discussion for several years. In fact, even hardness is not a readily measurable magnitude since the…
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The accelerated laboratory ageing of coated steel by multiple thermal shock has been proposed. Three polyvinyl coated steel panels exposed to natural weathering for different periods (0, 3 and 6 years) were thermally treated from temperatures of…
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With the introduction of the opt out HIV testing policy in Ghana, the HIV test is offered routinely to all pregnant women unless they decline testing.
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Papers in associated sub-disciplines
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