Asian Transactions on Science & Technology
Volume: 01, Issue: 06, January 2012
Title: Study on FEM and theoretically predicted Hysterisis loops
Authors: Nimali T. Medagedara, P.D. Sarath Chandra
Paper ID: ATST-50107046
Pages: 1 - 9
Abstract: Fatigue failure often initiates from a point of stress concentration, where the local deformation is inelastic. Therefore the components with complex geometries are frequently subjected to alternating loads, which produce multi-axial stresses. In most cases, the loading is non-proportional. These alternating loads tend to initiate fatigue cracks at notches and at other regions of high stresses. Some typical situations in which fatigue can occur are the repeated expansions and contractions of a pressurised aircraft, a car suspension unit absorbing the undulations of a normal road surface and the rhythmic crashing of waves against hull of a ship. However, occurrence of fatigue is a common phenomenon in many engineering components and their failures are also attributed to fatigue. For fatigue analysis of industrial components, the knowledge of cyclic deformation behaviour is essential. However, such knowledge is difficult to obtain for non-proportional loading situations. Although notch deformation can be analysed by methods such as Neuber, this paper the finite element method was used to analyze a notched bar and was validated using a Neuber method for different loading conditions is presented.
PDF (310 KB)
Title: Presenting Organization’s Business Processes on the Basis of Text Mining Technology
Author: Abed Saif Alghawli
Paper ID: ATST-30117064
Pages: 10 - 15
Abstract: Because organizations create many different and irrelevant documents, which are under elaboration and intended for regulating the particular organization’s business processes (OBP) with the aim of efficient and effective management implementation over this organization, the issues of business processes construction are studied on the basis of intellectual analysis of texts of documents that describe the processes taking place within the organization such as job descriptions, agreements, specifications and standards, regulations and time limits of works, etc.
PDF (234 KB)
Title: Electrical and Optical Properties of PVA/LiI Polymer Electrolyte Films
Authors: Hamed M. Ahmad, Sabah H. Sabeeh, Sarkawt A. Hussen
Paper ID: ATST-40116065
Pages: 16 - 20
Abstract: PVA has been doped by different percentage of Lithium Iodide (LiI), electrical and optical properties of polymer electrolytes have been investigated. At low frequency, the variation of dielectric constant and dielectric loss with frequency shows the presence of material electrode inter-face polarization processes. The exponent factor(s) found is between 0.98 and 0.442 and obeys the universal power law. The absorption of pure and doped films have been studied in the visible and ultra-violet wavelength regions. It has been observed that the new absorption peaks at 290 and 375 nm are due to the formation of charge transfer complex. From direct allowed transition the optical energy gap decreases from 5.56 eV (for pure PVA) to 4.95 eV (for PVA+20%LiI).
PDF (430 KB)
Title: A STUDY ON THE EFFECTIVENESS OF A PLANNED TEACHING PROGRAMME TO IMPROVE THE KNOWLEDGE REGARDING “Ergonomics For Computer Use” AMONG SELECTED STAFF OF MAJAN COLLEGE – MUSCAT – SULTANATE OF OMAN
Authors: Sonal Devesh, Nisreen Al-Bimani
Paper ID: ATST-10129062
Pages: 21 - 28
Abstract: This paper describes a study conducted to evaluate the effectiveness of a teaching programme on “Ergonomics for Computer use” among the staff of Majan College. A pre experimental research design was used to conduct the study. Thirty samples who met the study criteria were selected using convenience sampling technique. The knowledge level of the staff was assessed using a pretest questionnaire. The subjects were then exposed to a planned teaching programme. The teaching programme included power point presentation with multimedia clippings, demonstration of exercises regarding ergonomics of computer use. The post test questionnaire was administered to the staff, to determine whether there is a gain in knowledge due to the exposure of the subjects to the teaching programme. The results of the experiment showed that there was an increase in the pretest (m=9.36, s=3.91) and the post test mean (m=15.99, s=3.09) scores. Paired “t” test, proved that there was a significant difference in the pre and the post test scores (t29 = 11.466) at 5% level of significance. This difference was due to the intervention in the knowledge of the subjects.The practical application of this intervention would create health awareness to all computer users, thus improving quality of work environment.
PDF (693 KB)
Copyright © 2017 - Asian Transactions