Study of Imperfect Manufacturing System with Preservation Technology Investment Under Inflationary Environment for Quadratic Demand: A Reverse Logistic Approach

This paper focuses on imperfect manufacturing system with remanufacturing, manufacturing and product returned cycle for a single item which deteriorates with respect to time. The product has maximum fixed lifetime. To decrease deterioration of the product, manufacturer spends capitals on preservation technology to preserve the item. In this paper, the effect of inflation is also considered. Here, time-dependent quadratic demand is debated which is suitable for the products whose demand increases initially and afterward it starts to decrease. The objective is to minimize the total cost of manufacturer with respect to cycle time and investment for preservation technology. The model is supported with numerical example. Sensitivity analysis is done to derive insights for decision makers. Graphical result, in three dimensions, is exhibited with supervisory decision.

Aerodynamic Analysis on Proton Inspira by Simulation

The purpose of this project is to study the airflow from across Proton Inspira car and evaluate the drag force and drag coefficient of the Proton Inspira car by simulation. All relevant data are collected through the literature review from book and journal. In methodology, model specification and simulation procedure is explained, together with consider assumption. Five selected speed were been input to the software to determine the CD Value. The calculation and graphical result has been generated by the software and discussed.

Development of a web application for Low Impact Development Rapid Assessment (LIDRA)

This paper describes the development of a database and a website to support the newest version of Low Impact Development Rapid Assessment (LIDRA) model, LIDRA 2.0, a planning level model for assessing the cost-effectiveness of low impact development (LID) and addressing runoff-related problems in urban watersheds. LIDRA 2.0 is a web-based application that generates stochastic precipitation data from local historical data sets using a Markov Chain and bootstrapping method. Precipitation is applied to urban watersheds with parcel and street areas. LID scenarios and associated adoption and repaving rates are then used to perform multiple 30 year simulations, during which the difference in runoff is calculated using a water balance. The application needs to store parcel and street specifications and also offer a management interface, both of which must be accessible through the internet. The results of this are: an efficient tool to support LIDRA in terms of storage, retrieval and analysis of data and an integrated web application which allows users an easier way to input data and greatly reduce the time it takes to manage simulation modules via use of the graphical result interfaces that show the results produced. The technical underpinnings of this tool are highlighted using a small example.

The linear elastic in-plane bending of curved hollow profiles having a thin-walled rectangular section

This paper presents a simple solution for the flexibility calculation of curved profiles having a rectangular thin-walled cross-section. Some assumptions related to geometric details about the shape of the deformed structure are included in the present analysis, aiming at an economic and accurate solution. Results concerning the distortion of the transverse section are compared with the corresponding data from the solution with a thin shell finite element analysis. A flexibility factor for the structure analysed here is presented as a graphical result.