Laminar free convection heat transfer from vertical and inclined arrays of horizontal isothermal cylinders in air was investigated experimentally and numerically. Experiments were carried out using Mach-Zehnder interferometer and the FLUENT code was used for numerical study. Investigation was performed for vertical and horizontal cylinder spacing from 2 to 5 and 0 to 2 cylinder diameters respec...

In this paper, accumulation of plastic deformation of AISI 1045 steel plates with circular cutouts under cyclic axial loading is studied. Loading was applied under force-control conditions. Experimental tests were performed using a Zwick/Roell servo hydraulic machine. Under force-control loading with nonzero mean force, plastic strain was accumulated in continuous cycles called ratcheting. Nume...

dear editor-in-chief   pilomatrixoma is a benign tumor of hair follicle first described as calcifying epithelium (1). it accounts for 1% of all the benign skin tumors (2). it is a slow-growing, firm, dermal or subcutaneous neoplasm, usually measuring fewer than 3 cm in diameter. pilomatricomas are considered benign; rarely recur after surgical excision (3). however, cases of pilomatrixoma with ...

Height-diameter models are fundamental for the inventory of timber, biomass and carbon. Located in central region Mexico, Abies religiosa is a conifer with high timber value that lacks to estimate its height as function diameter. The objective this study was determine local height-diameter model A. trees under mixed-effects approach Tlaxco, Tlaxcala, Mexico. first step consisted evaluating qual...