Six sets of particle image velocimetry (PIV) data from the bottom boundary layer of the coastal ocean are examined. The data represent periods when the mean currents are higher, of the same order, and much weaker than the wave-induced motions. The Reynolds numbers based on the Taylor microscale (Re ) are 300–440 for the high, 68–83 for the moderate, and 14–37 for the weak mean currents. The mod...

ten solanum tuberosum cultivars and accessions from 11 wild solanum species were evaluated for their tolerance to salt (200 mm nacl or 100 mm na2so4), drought (35% peg), cold (-4ºc) and heat (37ºc). evaluation was based on electrolyte leakage from de-tached leaves of in vitro plantlets. testing involved a rinsing treatment with three changes of distilled water to remove electrolytes from leaf a...

Due to the high in situ stresses, dynamic disasters occurred frequently Huainan mining area, China. Our understanding of stresses this area is still insufficient. In study, 18 sections two boreholes Xinji No. 1 coalfield were measured using hydraulic fracturing method, and distribution investigated. The relationship between stress geological structure was summarized limitation fault friction st...

Abstract The breaking features and stress distribution of overlying strata in a steeply dipping coal seam (SDCS) differ significantly from those near-horizontal one. In this study, the laws governing evolution vertical release shear concentration seams with different dip angles are derived via numerical simulation, rock mechanics tests, acoustic emissions, field measurements. Thus, stress-drive...

in the traditional hole drilling method the in-plane stresses are studied in detail and the interlaminar stresses are not taken seriously. the interlaminar stresses on the free edge of composite materials are important and can cause matrix cracking and delamination. inserting holes in composite laminates causes free edges and it can induce interlaminar shear and normal stresses. in this researc...

A total of four moorings from POLYMODE Array I and II were analyzed in an investigation of internal wavefield-mean flow interactions. In particular, evidence for wave-mean flow interaction was sought by searching for time correlations between the wavefield vertically-acting Reynolds stress (estimated using the temperature and velocity records), and the mean shear. No significant stress-shear co...

Field observations from a vertical stack of two-component current meters obtained from the 1994 Duck94 nearshore field experiment (presented in a companion paper by Lippmann, et al.) show significant vertical structure in energy, phase, and rotation of motions at low frequencies around 0.005Hz. Low-frequency motions are typically modeled in the surfzone with the shallow-water (depth averaged) m...

The interface friction between geosynthetics has previously been extensively studied with reference to medium-high contact stresses. strength at low stress is a less investigated chapter whose importance, however, evident for the stability of geosynthetic landfill barriers during construction stage and covering systems. inclined plane most used laboratory test measuring normal stresses as 5 kPa...

Loads cause vertical movements of the foundations all structures. Their magnitude determines building safe operation. A closed analytical solution to problem linear elastic theory for distribution stresses and strains in a homogeneous isotropic foundation has been presented. The article considers calculation stress-strain state an half-plane by method displacement functions. calculating built. ...