A simplified, vertically-averaged model of soil moisture interpreted at the daily time scale and forced by a stochastic process of instantaneous rainfall events is compared with a vertically-averaged model which uses a nonoverlapping rectangular pulse rainfall model and a more physically based description of infiltration. The models are compared with respect to the importance of short time-scal...

Carbon-fiber-reinforced ultrahigh-temperature ceramic (C/UHTC) matrix composites are an attractive candidate for fabricating various hot structures. The present study aimed to establish a Si-free Zr–Ti melt-infiltration method C/UHTC composites. To achieve this, the wettability of alloys on carbon and their reactivity were examined. melted graphite plates infiltrated into model preforms, which ...

Reactive melt infiltration is viewed as a promising means of achieving near-net shape manufacturing with quick processing time and at low cost. Since the reactants and products are, in general, of varying density, overall conservation of mass dictates that there is a force related to chemical conversion which can directly influence infiltration behavior. In effect, the driving pressure forces m...

A kind of 2.5-dimensional C/C-SiC composites was fabricated by using Isothermal Chemical Vapour Infiltration process (ICVI). Frictional properties of this material were evaluated by using MM-1000 under dry condition. Average dynamic friction coefficient of it was 0.16, static friction coefficient and average coefficient stability were 0.15 and 0.56, respectively. However, weight wear rate was l...

Acute renal failure (ARF) is an unusual manifestation of lymphomatous infiltration of the kidneys. In this article, a patient whose initial presentation of lymphoma was the sudden onset of painless hematuria and ARF is described. The absence of other causes of ARF, together with massively enlarged unobstructed kidneys on renal ultrasonography, strongly suggested an infiltrative process. Renal b...

abstract this study addresses two dimensional infiltration from irrigated furrows. the basic approach is to develop a two-dimensional infiltration as a combination of the corresponding one-dimensional vertical and an edge effect. the edge effect is the difference between the cumulative infiltration per unit of adjusted wetting perimeter and the corresponding one-dimensional infiltration. this a...

Fatty change of the liver is an extremely common lesion, generally found as a diffuse process involving the entire organ. Focal fatty infiltration appears to be rather rare and can be found in many different patterns [1]. Delivery of insulin in the peritoneal dialysate, instead of the usual subcutaneous route, is a wellestablished method for diabetic patients on continuous ambulatory peritoneal...

This study investigated the weakening model, law of mechanics parameters, and stability sliding zone soil associated with thrust-load-induced accumulation landslides triggered by rainfall infiltration. The spatial morphological characteristics rule sapping process were analyzed, considering constitutive equation soil, in order to establish a state curve for coefficient based on “S”-shaped curve...

Silicon carbide fiber-reinforced silicon matrix composites (SiC/SiC CMCs) are promising candidates for hot gas components in jet engines. Three common manufacturing routes chemical vapor infiltration, reactive melt infiltration (RMI) and polymer pyrolysis (PIP). A combination of the processes seems attractive: remaining porosity after PIP process can be closed by subsequent siliconization, resu...

Sensitization and challenge using DNFB induce contact hypersensitivity (CHS) with predominant type 1 helper (Th1) cell infiltration, whereas those using FITC generate CHS with Th2 cell infiltration. CHS results from inflammatory cell infiltration, a process that is highly regulated by the expression of multiple adhesion molecules. We attempted to determine the role of L-selectin and ICAM-1 in T...