Wellbore instability is one of the most serious issues faced in drilling process. During operations, cyclic loads applied on fractured formation progressively modify initial parameters (i.e., length and width) formation, thus resulting into undesirable wellbore instability. In this paper, using a nonlinear finite element software (ABAQUS) as numerical simulator, poro-elasto-plastic model has be...

A universal relation between the leading correction to entropy and extremality was gotten in work of Goon Penco. In this paper, we extend massive gravity investigate thermodynamic relations a topologically higher-dimensional black hole. rescaled cosmological constant is added action as perturbative correction. This modifies bound hole leads shifts mass, entropy, etc. The Goon-Penco gotten. Rega...

Even when we consider Newtonian stars, i.e., stars with surface gravitational redshift, z ≪ 1, it is well known that, theoretically, it is possible to have stars, supported against self-gravity, almost entirely by radiation pressure. However, such Newtonian stars must necessarily be supermassive(Hoyle and Fowler 1963; Fowler 1966; Weinberg 1972). We point out that this requirement for excessive...

Hayashi, M. and Quinton, W. L. 2004. A constant-head well permeameter method for measuring field-saturated hydraulic conductivity above an impermeable layer. Can. J. Soil Sci. 84: 255–264. Hydrologic understanding of mountainous and northern regions of Canada is poor owing to the lack of critical field data such as hydraulic conductivity. A portable field instrument, the Guelph permeameter (GP)...

Laser drilling is a well-established process in aerospace industry. However quality and geometry of holes do not get under control in an absolute way. Moreover, drilling understanding is complicated due to the number of parameters and physical phenomena. Laser and matter have some own parameters which are not constant with temperature, and so could not be fitted. In this paper, we describe the ...

Heterostructure engineering capability, especially in the radial direction, is a unique property of bottom-up nanowires (NWs) that makes them a serious candidate for high-performance field-effect transistors (FETs). In this Letter, we present a comprehensive study on size dependent carrier transport behaviors in vapor-liquid-solid grown Ge/Si core/shell NWFETs. Transconductance, subthreshold sw...

-The gases dissolved in Lake Nyos, Cameroon, were quantified recently (December 1989 and September 1990) by two independent techniques: in-situ measurements using a newly designed probe and laboratory analyses of samples collected in pre-evacuated stainless steel cylinders. The highest concentrations of CO2 and CH 4 were 0.30 mol/kg and 1.7 mmol/kg, respectively, measured in cylinders collected...

In the vervet monkey Cercopithecus ethiops Schlemm's canal was opened to the outside by a window through the sclera. The flow of aqueous was collected with sponges and weighed. In jour eyes the drainage ranged from 0.5 to 4.5 \iL per minute at the start. Fifteen minutes later it reached an average value between 0.2 and 2 fiL per minute depending on the animal. In 2 animals pressure in the opera...