منابع مشابه
Needleless Electrospinning Using a Flat Wheel Spinneret
Nanofibers have a wide range of applications, however; the mass production of nanofibers is still an obstacle to wider industrial application. In this paper, a flat wheel was used as a spinneret for production of poly (vinyl) alcohol nanofibers. Electric field comparative analysis was done between the flat wheel and other spinnerets such as a cylinder, disk and ring. It was found the flat wheel...
متن کاملA Review of the Occurrence and Mechanisms of Induction of Osteoporosis Following Spinal Cord Injury
Introduction: Spinal cord injury (SCI) causes devastating injuries in patients. The main mechanisms of the pathogenesis of secondary injury include nerve degeneration, gliosis, and inflammation. Spinal cord injury induces a disorder or failure in several organs due to the vital role of the spinal cord in regulating bodily functions. Osteoporosis is a consequence of spinal cord injury that occur...
متن کاملOccurrence and Mechanisms
The occurrence, nature, and pathogenesis of intestinal lesions were studied in a number of graft vs. host reaction (GVHR) conditions in mice, combining variations in the nature of the following: the F1 hosts (newborn or adult, normal or lethally irradiated), the injected parental T cells (mixed or selected subsets of Lyt2' or L3T4' cells), and the antigenic stimulus (semiallogeneic or restricte...
متن کاملDesign and Analysis of MEMS based Accelerometer for Automatic Detection of Railway Wheel Flat
This paper presents the modeling of a MEMS based accelerometer in order to detect the presence of a wheel flat in the railway vehicle. A haversine wheel flat is assigned to one wheel of a 5 DOF pitch plane vehicle model, which is coupled to a 3 layer track model. Based on the simulated acceleration response obtained from the vehicle-track model, an accelerometer is designed that meets all the r...
متن کاملRailway Wheel Flat and Rail Surface Defect Detection by Time-Frequency Analysis
Damage to the surface of railway wheels and rails commonly occurs in most railways and, if not detected at an early stage, can result in rapid deterioration and possible failure incurring high maintenance costs. If detected at an early stage these maintenance costs can be minimised. This paper presents an investigation into the use of time-frequency analysis of vibrations in railway vehicles fo...
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ژورنال
عنوان ژورنال: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
سال: 1991
ISSN: 0387-5024,1884-8354
DOI: 10.1299/kikaic.57.2011