We present a biomechanical model based four-dimensional computed tomography (4DCT) simulation method for examining the patient lung deformation induced by respiratory motion, given only one CT scan as an input. First, we model the lung stress-strain behavior using a sophisticated hyperelastic model, and solve the lung deformation problem through finite element (FE) analysis. We introduce robust...

introduction: diaphragmatic hernia could be caused by congenital disorders, blunt trauma or penetrating injuries. the diagnosis of traumatic diaphragmatic hernia is normally neglected during the first presentation leading to late complications and considerably increased mortality and morbidity among the patients. materials and methods: in this retrospective, descriptive study, we reviewed the m...

In this paper we present a new model for calculating the capacitance of MEMS sensor with corrugated diaphragm. In this work the effect of residual stress is considered on deflection of diaphragm and capacitance of sensor. First, a new analytical analyzes have been carried out to derive mathematic expressions for central deflection of corrugated diaphragm and its relationship with residual stres...

Reciprocating diaphragm micro-pumps are the most common type among indirectly–driven micro-pumps. They operate by reciprocating the diaphragm with associated check valves. This paper addresses the Hydroelastic vibration of circular elastic diaphragm interacting with the incompressible and inviscid liquid inside the cylindrical chamber with a central discharge opening. Taking into account axisym...

three-year-old boy came to emergency room of soraya medical center with abdominal pain, nausea, vomiting and distended abdomen for a period of three days. x-ray showed fluid in the peritoneal cavity and at pleural space, mild elevation of the hemi diaphragm, and thick left diaphragm. surgery showed sub diaphragmatic abscess under in the hemi diaphragm and peritonitis. the autopsy showed several...

Cross walls have been used as alternative auxiliary measures to protect buildings in some areas of Asia. Realizing the inadequacy classical Winkler foundation predict deflection diaphragm wall with cross wall, a modified finite element method (MEFB) was formulated this paper. Then, MEFB verified through two excavation cases and applied new well-documented history. Results showed that by propose...

Advanced composite materials are attractive in situations where high performance materials are required, such as in aerospace, military, medical applications and sporting goods industries. However, because they are difficult to shape into complex geometries, currently, most composite parts are manufactured by the hand lay-up process, which is time-consuming and labor-intensive. The main motivat...

In this paper, a new model for resonance frequency of clamped circular corrugated diaphragm has been presented. First, an analytical analyzes has been carried out to derive mathematic expressions for mechanical sensitivity of diaphragm with residual stress. Next by using Rayleigh's method we present mathematical model to calculate the resonance frequency of corrugated diaphragm and investigate ...

This paper is focused on a novel design of stepped diaphragm for MEMS capacitive pressure sensor used in tire pressure monitoring system. The structure of sensor diaphragm plays a key role for determining the sensitivity of the sensor and the non-linearity of the output.First the structures of two capacitive pressure sensors with clamped square flatdiaphragms, with different thicknesses are inv...

background diaphragmatic hernia after blunt trauma is an uncommon and often undiagnosed condition. objectives we aimed to review patients who presented with delayed blunt traumatic hernia of diaphragm. patients and methods in this retrospective study, the medical records of six patients treated for blunt diaphragmatic hernias who were admitted to kashan shahid beheshti hospital between june 200...