BACKGROUND Pseudocyst of the auricle is a common benign disease. Many treatment modalities have been described for this benign condition ranging from simple aspiration to complex cutaneous surgeries involving skin de-roofing and debridement with diamond burr. the aim of treatment is to successfully resolve the seroma without damaging the underlying healthy cartilage, thus maintaining the norma...

Reinforced concrete pipe (RCP) has been one of the most common pipes for medium to large diameter utility systems including sanitary sewer, and storm drainage systems. RCP typically has superior structural properties combining high compressive strength from concrete and tensile strength from reinforced steel. RCP tends to deteriorate over time due to hydrogen sulfide (H2S) gas in sewage and man...

Mining coal, oil and other energy will form much slope engineering, such as open-pit mine depot slope. The groundwater seepage seriously affects the stability of these engineering projects. Drainage pipes are commonly used in projects to reduce risk moisture decreasing soil stability. Such prone blockage by accumulation after a period operation, resulting decreased drainage or complete failure....

Over the past several years, the presence of fibrous asbestos particulates has been observed in a number of municipal water supplies throughout the USA, Canada, and several other regions all over the world. The possible health hazards which these fibers present have spurred a great deal of interest in the problems of detection and removal of the submicroscopic particulates in water. Asbestos is...

the dominant traditional view to designing drainage systems explains drainage goals only in terms of crop yield increase and rhizosphere improvement while ignoring the environmental impacts of drainage projects. nowadays, this view has been changed into a new one in which both environmental and agricultural purposes are taken into consideration. depth and spacing of subsoil drains are important...

Acid mine drainage (AMD) is usually treated by air oxidation followed by addition of lime to precipitate metal hydroxides and calcium sulfate. Geo2 Limited of Melbourne, Australia, has developed and patented a novel alternative precipitation scheme based on the formation of mixed valency, M(II)-M(III), hydroxide sulfate salts. When the composition of AMD has an appropriate ratio of Fe(II):Fe(II...

This paper investigates the relationship between mechanical behaviors and shape of corrugated fiberboard by means of buckling analysis, which is done by FEM (Finite Element Method). Firstly, after analyzing the structure of corrugated fiberboard a single-wall corrugated fiberboard model was built. The buckling load was measured in the ideal condition by linear buckling analysis (eigenvalue buck...

Corrugated web girders represent a new structural system emerged in the past two decades. The girder’s flanges provide the flexural strength of the girder with no contribution from the corrugated web which provides the girder’s shear capacity. Failure of the web occurs by steel yielding, web buckling or interactively between them. Lateral torsion and local flange buckling of corrugated web gird...