In this work, we consider simulation of heat fl w in the shallow subsurface. As sunlight heats up the surface of soil, the thermal energy received dissipates downward into the ground. This process can be modeled using a partial differential equation known as the heat equation. The spatial distribution of soil thermal conductivities is a key factor in the modeling process. Prior to this study, t...

3) Gr£ff/ G;,W" Culture and varieties of Siamese Pummelos. Calif. Citrograph 15, 442 (1930). 4) Hagin, j.# Influence of soil aggregation on plant growth. Soil Sci. 74, 471-478 (1952). 5) Jones, W. W., Pearson, H. E.# Parker, E. R. and Huberty, M. R., Effect of sodium in fertilizer and irrigation water on concentration in leaf and root tissues of citrus trees. Proc. Am. Soc. Hort. Sci. 60, 65-70...

Green roof systems could help reduce peak discharge and retain rainwater in urban areas. The objective of this study was to investigate the hydrological behavior a green system by using SEEP/W model. rainfall-runoff relationship within simulated results were compared with actual data from test bed for verify applicability SEEP/W. Then, verified model used simulate varying four factors (soil typ...

foundations behavior is affected by soil behavior which can vary from dilative to contractive depending on the stress level, particularly in dense frictional soils. the zero extension lines (zel) method has been generally developed to predict the foundations behavior. knowledge of soil behavior enables the zel method to predict the general and local shear failure modes. in this paper, a relativ...

A ring $R$ with an automorphism $sigma$ and a $sigma$-derivation $delta$ is called $delta$-quasi-Baer (resp., $sigma$-invariant quasi-Baer) if the right annihilator of every $delta$-ideal (resp., $sigma$-invariant ideal) of $R$ is generated by an idempotent, as a right ideal. In this paper, we study Baer and quasi-Baer properties of skew PBW extensions. More exactly, let $A=sigma(R)leftlangle x...

physical modeling for study of deep foundations can be performed in simple chambers (1g), calibration chambers (cc), and centrifuge apparatus (ng). these common apparatus face certain limitations and difficulties. recently, frustum confining vessels (fcv) have been evolved for physical modeling of deep foundations and penetrometers. shaped as the frustum of a cone, this device applies steady pr...