Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 329 for “"surface energy"”.
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Hydrate formation and adhesion on low surface energy materials
… barrier film between the hydrate and the solid surface. The presence of this liquid film depends on the spreading coefficient of cyclopentane on the solid in the presence of water. Through a systematic modification of the surface chemistry of the solid surface using two different silanes, we …
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Toward Closing the Urban Surface Energy Balance Using Satellite Remote Sensing
The energy exchanges at the Earth’s surface are responsible for many of the processes that govern weather, climate, human health, and energy use. This exchange, commonly known as the surface energy balance (SEB), determines the near-surface thermodynamic state by partitioning the available energy …
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Investigating the Surface Energy and Bond Performance of Compression Densified Wood
The bond performance and surface energy of hygro-thermal compression densified wood were studied using comparisons to hygro-thermally treated and control yellow-poplar (Liriodendron tulipifera). Bond performance was studied using opening mode double cantilever beam fracture testing and cyclic …
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Polyacrylamide hydrogel friction controlled by time-dependent surface energy due to poroelastic relaxation
… friction behavior, and be used to design surfaces for tissue engineering and drug delivery. Polyacrylamide gels were tested to quantify how the coefficient of friction changes under different conditions. Unlike common single-phase materials, hydrogels store water within a hydrophilic …
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A finite element surface tension model with forces based on surface energy minimization
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.
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A calorimetric study of the effects of surface energy in a type II superconductor
… study of the effects of the interphase surface free energy has been conducted on ellipsoidal samples of first and second kind superconductors. The measurements were performed using a specially designed magnetization calorimeter by two different techniques. The measurements were made on …
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The application of the surface energy balance system model to estimate evapotranspiration in South Africa
… data inputs. In this study, the pre-packaged Surface Energy Balance System (SEBS) model was used for the first time in the South African environment alongside MODerate Resolution Imaging Spectroradiometer (MODIS) satellite data and validated with eddy covariance data measured in a large apple …
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The Dynamics of Gas-Surface Energy Transfer in Collisions of Diatomic Gases with Organic Surfaces
… understanding of the interaction dynamics and energy transfer between gas molecules and surfaces is essential for the study of various chemical reactions. The collisions of diatomic molecules on organic surfaces are crucial to the study of atmospheric chemistry. Molecular beam scattering …
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The Dynamics of Gas-Surface Energy Transfer in Collisions of Rare Gases with Organic Thin Films
… in all fields of chemistry. Insight into gas-surface reaction dynamics can be gained through molecular beam scattering experiments combined with classical trajectory simulations. In particular, energy exchange and thermal accommodation in the initial collision, the first step in most chemical …
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Examining surface energy and moisture balance changes associated with land conversion from annual to perennial biofuel crops
… food production and the search for renewable energy. Second-generation cellulosic biofuel feedstocks are being pursued as part of the solution to diversifying both the agro-economic and renewable energy sectors. This land conversion is expected to alter the surface energy balance via albedo …
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Characterizing the chemistry of yellow-poplar surfaces exposed to different surface energy environments using DCA, DSC, and XPS
Surface energy changes in extracted and unextracted yellow-poplar upon exposure to aluminum, teflon, and heat/air surface treatments have been described using dynamic contact angle (DCA) and X-ray photoelectron spectroscopy (XPS) analysis. Results show that the surface molecular orientation of …
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Micrometeorological approaches to measure and model surface energy fluxes of irrigated citrus orchards in a semi-arid environment
… theoretical methods for evaluating mass and energy exchange processes within one of the most relevant crop of the agricultural Sicilian context. The study was conceived as a long monitoring program of micrometeorological features of the study orange orchard at different spatial scales (plant, …
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Soil Moisture Dynamics and Thresholds for Surface Energy Balance Regime Transitions: An Observational Analysis at a U.S. Grassland Site
… critical for assessing plant water stress, surface energy partitioning, and land–atmosphere interactions. These periods of moisture loss, commonly referred to as soil moisture drydowns, provide a valuable window into the transition from wet to dry surface conditions. This study focuses on …
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Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment
… system. Experiments were based on a theoretical surface energy model proposing enhanced texture of the oxide at the Ag interface after melt-processing. Two classes of samples were processed and compared. Bi-2212 powder was deposited on a thin-foil Ag surface and was melt-processed to yield a 20 ± …
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Quantification of the Impact of Supraglacial Lakes and Slush on Surface Energy Balance of Ice Shelves: Nivlisen Ice Shelf, East Antarctica
… are prevalent features of Antarctic ice shelf surface hydrology and efficiently transfer energy to the ice by melt-albedo feedbacks (Dell et al., 2020; Moussavi et al., 2020). There have been few efforts to quantify the energy exchanges between supraglacial meltwater, atmosphere, and ice …
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Mesoscale Wind and Temperature Changes over Peatlands of the Hudson Bay Lowlands: impacts on the Surface Energy Balance and Net CO2 Exchange
… observed changes in the sea ice dynamics and energy budget of the Hudson Bay, yet it is presently unknown how these climatic changes in the Bay will impact the surface energy and carbon balance of the adjacent HBL. As a globally significant peatland carbon pool, the HBL will play an important …
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Micromechanical Modeling of the Interaction of Diffusion Mechanisms and Surface Energy With Nonlinear Material Deformation: Applications to Powder Densification and Void Growth
… whereas void size depends critically on the surface energy of the void in relation to the void size and applied load.
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Using a surface energy budget framework to characterize grass-biophysical response to changes in climate in support of on-farm decision making in Ireland
… Ireland, uses a framework that combines a land surface scheme (LSS) based on a surface energy budget theory, available environmental observations, land surface and atmospheric analyses, to understand essential mechanistic factors that determine grass growth response across the Irish landscape. A …
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Surface Properties of Hydrophilic Polymers
… polymer) soft, elastic gels (‘hydrogels'). The surface properties of this group of materials are important in both the dehydrated and hydrated state and yet no thorough-going study has been previously made of this aspect of these polymers. The surface properties in the dehydrated state govern …
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