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High quality planar waveguide YAG/Nd: YAG/YAG ceramics were developed by Prof.
LI Jiang's group at Shanghai Institute of Ceramics of Chinese Academy of Sciences and were tested as laser gain media by the research group led by Prof. Holography technology provides a promising way to design and reconstruct electromagnetic waves with desired phases and amplitudes, which has a broad range of applications in beam shaping, in authentication, and in the entertainment industry. High quality planar waveguide YAG/Nd: YAG/YAG ceramics were developed by Prof.
If you want to date your local bricks you will have to get information specific to the county or city that you live in.
Several methods of scientifically dating individual bricks have been explored.
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Before the advent of carbon 14 dating, estimate of age is a rather hazardous undertaking.
In the production of building materials and ceramics, such as engineered lumber, roofing materials, structural blocks, and decorative ceramics, the control of moisture sorption is important.Whether it is in preparing a surface coating or optimizing a cement formulation, feedback on the effectiveness of the process is critical.Measuring the water sorption of these materials under actual or aggressive (accelerated) conditions can provide the information needed to perfect the process.Quantachrome Instruments for water sorption analysis are the Aquadyne DVS and VSTAR.Water Activity (Aw) is defined as the ratio of the partial vapor pressure of water in a substance to the vapor pressure of pure water at the same temperature (i.e. Water activity is a good indication of the amount of moisture in a material and can be a valuable indication of the initial condition of raw materials used in producing building materials.