One of the attractive features of hybrid perovskite is the possibility to reduce its dimensionality, which enhances the perovskite’s resistivity to moisture. In this work, we used 2D/3D perovskites to study different organic molecular spacers (aromatic ring vs cyclic ring); Cs was introduced as an additional small cation to methylammonium. It was found that Cs improves the photovoltaic performa...

easily differentiated from the BY normal contour and color of the A. R. MASTEN, M.D. s]dn Specific because without wheatridge, Colo. a pl.ece(]jng infection with tubercle bacilli no reaction will occur. Accurate because no other known combination of factors will give the same result. That is, a person cannot become sensitive to tuberculin by any means except a previous infection with tubercle b...

It is the intent of this manuscript to provide a general treatment of braiding: past, present, and future. A history and evolution of braiding, braiding machinery, and related engineering developments is provided with emphasis on the design, manufacture, and analysis of braided fabrics and composites. Some recent developments are briefly described, including: 1. a composite braider with axial y...

The emergence of fuel cell systems and hybrid fuel cell systems requires the evolution of analysis strategies for evaluating thermodynamic performance. A gas turbine thermodynamic cycle integrated with a fuel cell was computationally simulated and probabilistically evaluated in view of the several uncertainties in the thermodynamic performance parameters. Cumulative distribution functions and s...

System analysts are service providers who are required to work closely with users for the purpose of defining, developing and implementing computer-based systems. Analysts and users in pdvate organizations may have different expectations and proficiencies than those in public organizations, in part due to the types of appli. cations required. Beliefs about how others are supposed to perform and...