Rotational drilling was a revolution in drilling technology. It made the drilling process more efficient and faster and more depth of well could be achieved through rotation method. Besides all of its advantages, the rotation approach induced some problems like pipe sticking and downhole cleaning to the drilling procedure. Hole cleaning and reduction of torque and drag seems to be vital in incl...

By the Von Neumann regular graph of R, we mean the graph that its vertices are all elements of R such that there is an edge between vertices x,y if and only if x+y is a von Neumann regular element of R, denoted by G_Vnr (R). For a commutative ring R with unity, x in R is called Von Neumann regular if there exists x in R such that a=a2 x. We denote the set of Von Neumann regular elements by V nr...

We prove that for any weakly convergent sequence of finite graphs with bounded vertex degrees there exists a limit graphing and thus an associated Type-II1 von Neumann algebra. The Kesten-von Neumann-Serre spectral measure of the Laplacian on the limit graphing is the weak limit of the spectral measures of the Laplacians of the finite graphs. Using this limit techniques we prove a Cheeger type ...

Mediation Information System Engineering project is starting its third iteration (MISE 3.0). The main objective of this paper is to introduce that version. MISE 3.0 aims at defining and designing a platform, dedicated to detect, initiate and support any collaboration opportunity among potential partners (obviously based on results inherited from MISE 1.0 and MISE 2.0). This MISE 3.0 platform im...

This study intends to enhance the understanding of successive searches over multiple sessions by characterizing successive searches with a conceptual model, Multiple Information Seeking Episodes (MISE), validating MISE and supporting successive searches with a prototyped information system, PERsonalized and Successive Information Seeking Toolkit (PERSIST), whose requirements are derived from MI...

conclusions the high prevalence of vwd among our patients was the same as other previous reports, suggesting low awareness about this disease and under diagnosis of mild cases. results mean age of our patients was 32.5 ± 10.6 years. the level of von willebrand factor in 22.5% and von willebrand activity in 19.6% of patients was abnormal. the prevalence of vwd among patients with menorrhagia was...

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alain robbe-grillet nous offre une modalité très représentative de la mise en abyme. la mise en abyme est un procédé dans lequel un récit  est emboîté dans un autre récit. en effet, à la lecture des gommes, nous constatons qu’il a inclus l’histoire d’œdipe-roi et en a fait une intrigue policière. c’est donc à la lumière de cette micro histoire  que la tragédie grecque est démythifiée. la mise e...

In [4] we proved that the limit of a weakly convergent sequence of finite graphs can be viewed as a graphing or a continuous field of infinite graphs. Thus one can associate a type II1-von Neumann algebra to such graph sequences. We show that in this case the integrated density of states exists that is the weak limit of the spectra of the graph Laplacians of the finite graphs is the KNS-spectra...