نتایج جستجو برای: leed
تعداد نتایج: 943 فیلتر نتایج به سال:
We determine the atomic structure of the (111) surface of an epitaxial ceria film using low-energy electron diffraction (LEED). The 3-fold-symmetric LEED patterns are consistent with a bulk-like termination of the (111) surface. By comparing the experimental dependence of diffraction intensity on electron energy (LEED-I(V) data) with simulations of dynamic scattering from different surface stru...
Low energy electron diffraction (LEED) experiments, LEED simulations, and finite slab density functional calculations are combined to study the cleavage surface of Co doped BaFe(2-x)Co(x)As2 (x = 0.1,0.17). We demonstrate that the energy dependence of the LEED data can only be understood from a terminating 1/2 Ba layer accompanied by distortions of the underlying As-Fe2-As block. As a result, s...
We examine the role of signaling and of intrinsic benefits in the adoption of the individual elements of the voluntary LEED (Leadership in Energy and Environmental Design) standards for green buildings. We use goodness-of-fit tests on data for all 442 LEED certified buildings and find that neither signaling nor pursuit of intrinsic benefits can independently explain the observed adoption patter...
LEED®-NDTM is the latest attempt to develop more sustainable urban environs in the United States. The LEED®-NDTM program was created to provide a green rating system that would improve the quality of life for all people through the inclusion of sustainable development practices. To achieve this, a premium is placed on the locational attributes of proposed projects under the “Smart Location and ...
The (0001) surface of a-Mo2C prepared by Ar ion bombardment and annealing was characterized using X-ray photoelectron spectroscopy and low energy electron diffraction (LEED). An ion-bombarded surface annealed to 1000 K exhibits an Mo/C ratio of 2.2, characteristic of an Mo-terminated surface. The Mo-terminated surface exhibits a complex, but predominantly ‘(1×1)’ hexagonal LEED pattern on a dif...
Understanding how firms adopt voluntary quality or environmental standards is important for designing such programs and evaluating their success. We study the adoption of LEED (Leadership in Energy & Environmental Design), an internationally recognized environmental building certification system. LEED offers four levels of certification, corresponding to greater investments in green building te...
Green building adoption is driven by both performance-based benefits and marketing based benefits. Performance based benefits are those that improve performance or lower operating costs of the building or of building users. Marketing benefits stem from the consumer response to green certification. This study illustrates the relative importance of the marketing based benefits that accrue to Lead...
BaFe2As2 exhibits properties that are characteristic of the parent compounds of the newly discovered iron (Fe)-based high-T(C) superconductors. By combining real-space imaging of scanning tunneling microscopy and spectroscopy (STM+STS) with momentum-space quantitative low-energy electron diffraction (LEED), we have identified the surface plane of cleaved BaFe2As2 crystals as the As terminated F...
We study the role of vertical differentiation in the adoption of LEED (Leadership in Energy & Environmental Design), a multi-tier environmental building certification system. Our identification strategy relies on the timing of adoption, and shows that builders seek to differentiate from each other when choosing a certification level. We estimate a model that incorporates both differentiation in...
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