One source of structural vibration in a submarine is the fluctuating axial thrust force applied to the thrust block by the propeller shaft. This paper describes the initial stages of experimental work being undertaken to validate an existing mathematical model for the sound radiation from a submarine excited by this mechanism. A thin cylindrical shell 1500mm long and 400mm in diameter made of 2...

Using disk form multilayers, a semi-analytical solution has been derived for determination of displacements and stresses in a rotating cylindrical shell with variable thickness under uniform pressure. The thick cylinder is divided into disk form layers form with their thickness corresponding to the thickness of the cylinder. Due to the existence of shear stress in the thick cylindrical shell wi...

Utilization of symmetric condition in NASIR Galerkin Finite Volume Method for linear triangular element unstructured meshes is introduced for numerical solution of two dimensional strain and stress fields in a long thick cylinder section. The developed shape function free Galerkin Finite Volume structural solver explicitly computes stresses and displacements in Cartesian coordinate directions f...

Background: Hydrosalpinx is a common cause of female infertility1 and adversely affects the outcomes of in vitro fertilization (IVF). Although IVF is the main treatment, alternative treatments, such as salpingectomy and functional tubal surgery have been suggested.2 Previously, hydrosalpinx was diagnosed using tubal patency tests (transvaginal ultrasound, TVUS; hysterosalpingography, HSG; and l...

Within the past decades extensive research has shed light into the structure, reactivity and properties of carbon nanotubes (CNTs) [1–3]. This new carbon allotrope is theoretically constructed by rolling up a graphene sheet into a cylinder with the hexagonal rings joining seamlessly. Commonly, carbon nanotubes are classified into single-walled carbon nanotubes (SWCNTs) which consist of one cyli...

Problems of propagation and diffraction nonstationary waves in elastic bodies are great theoretical practical importance such fields science technology as aircraft construction, shipbuilding, seismic exploration minerals, resistance structures, many others. The paper considers the problem skew-symmetric unsteady shear from a thick-walled spherical shell space. To solve problem, integral Laplace...

A 54-year-old man was admitted to our hospital due to exertional dyspnea. Chest radiography and CT revealed a large, thick-walled cavitary mass and a hydropneumothorax in the right lung in addition to a right hilar tumor and multiple small, thin-walled cavitary nodules (Picture 1). A transbronchial direct vision biopsy of the stenotic lesion of the right bronchus truncus intermedius revealed sq...

A novel dermatophyte species is described in the Microsporum cookei clade. It differs significantly from known taxa in the two molecular markers analyzed, i.e., ITS and partial β-tubulin (BT2). Morphologically the species was characterized by smooth- or only slightly rough-walled conidia, but isolates rapidly became pleomorphic with sparse, smooth- and thick-walled macroconidia in addition to m...