Volume 7, Issue 1, January 2016

Optimization of Overall Equipment Effectiveness Through Total Productive Maintenance Perspective – A Case Study

Salim R. K. and G. R. Rameshkumar

Caledonian College of Engineering, P.O. Box 2322, CPO 111 Seeb, Muscat, Sultanate of Oman

Abstract– The world class Overall Equipment Effectiveness (OEE) is termed to be 95% at least for an equipment under standard operating conditions. To achieve this performance to the assets needs major attention from the root level to the final production stages. The Total Productive Maintenance (TPM) concept can bring the equipment to this world class performance level with detailed analysis for all the TPM components. A case study has been carried out in an industry which uses CNC lathe machine in the production line to optimize the OEE to world class level. Presently it is observed that the CNC lathe machine was working with 31.21% OEE which is very low to the required level. The detailed analysis through all the TPM components brought out the key ineffectiveness throughout the processes. On implementation of TPM with detailed analysis and suggestions the OEE of CNC lathe machine improves from 31.21% to 74.47% which is still far less than the world class requirements. Further monitoring and improvement in the process, the equipment may improve the OEE level into world class OEE level.

Keywords— CNC Lathe, OEE, TPM and Availability

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Solutions of the Acoustic Problem in the 3D Form of the Helmholtz Equation Using DRBEM

Hassan Ghassemi, Ahmad Reza Kohansal and Mehdi Iranmanesh

Deaprtment of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran
Shipbuilding Eng. Group, School of Engineering, Persian Gulf University, Bushehr, Iran

Abstract– This paper presents to the solutions of the acoustic problem using dual reciprocity boundary element method (DRBEM). The acoustic propagates inside the silencer and its sound can be formulated by the three dimensional (3D) Helmholtz equation. The form of the equation is D2 ϕ + k2 ϕ = b(ϕ) which can be solved by the integral form on the boundary. The conventional boundary element method (BEM) is not suitable for solving the acoustic problems of silencers with higher Mach number subsonic flow, due to the presence of domain integral. The dual reciprocity method (DRM) is a method that converts the domain integral into the boundary integral. Mathematical formulations, discretization form and evaluation of the integrals are described and discussed. Algorithm of the method is also presented.

Keywords— Acoustic Problem, 3D Helmholtz Equation and Dual Reciprocity Method

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Internet of Things (IoT): An Overview of Applications and Security Issues Regarding Implementation

Hafsa Tahir, Ayesha Kanwer and M. Junaid

Department of Computer Science and Engineering, University of Engineering and Technology, Lahore, Pakistan

Abstract– The Internet of Things (IoT) is a powerful paradigm that has made progress in the almost every field of human life. This paper gives an overview of IoT, its enabling technologies, applications and security issues in the wireless technologies. IoT is enabled by a number of different technologies such as Radio Frequency Identifiers (RFID), and Wireless Sensor Networks (WSN). There are huge number of applications of IoT in almost every aspect of life i.e. healthcare, logistics and supply chain management, smart environment and social application etc. only a few of these applications are discussed in this paper. Security is one of the main concerns of wireless networks and so it is one of the main issues in IoT. This paper gives an overview of the few of many security concerns in an IoT system and methods to prevent those issues.

Keywords— Internet of Things (IoT), RFID, WSN, Healthcare and Security

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Design of Winglet Device for Aircraft

Khamis Ali Al Sidairi and G. R. Rameshkumar

Caledonian College of Engineering, P.O. Box 2322, CPO 111 Seeb, Muscat, Sultanate of Oman

Abstract– Aircraft winglet is a device placed at set of angle on the end of aircraft wing. This device plays a very important role in improving aircraft performance. The economic raise of the aircraft flight make the aircraft designer and the airline management to find a new technology to reduce the cost. After many search and study in this field the winglet design will be the best way to reduce cost. Winglet design will reduce the fuel consuming by reducing the aircraft drag and make the aircraft more stable during flight, also it will give the aircraft engine longer life by reducing the load on the engine thrust. The aim of this paper is to design and simulate a model of winglet for aircraft. Study about winglet contribution on aircraft performance in term of less fuel consumption and the stability of aircraft flying in continuation cruise flight or during take-off and landing. First author visited to Airbus Manufacturing Company to know the process and to understand how winglet devices are designed and how they contribute on aircraft drag reduction were discussed with the aircraft designing engineer. Study how winglet can reduce aircraft induced drag. Analyses about winglet effect on reducing wingtip vortex. This paper is also aim to design a model of winglet device by using software such as CATIA -V5 and ANSYS. This software play important role in time in use to make the designing, simulation and testing the designed model.

Keywords— Aircraft, Drag, Vortex and Winglet

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Security Architecture of 3GPP LTE and LTE-A Network: A Review

Sidra Anwar, Warda Ahmed and M. Junaid Arshad

Computer Science and Engineering Department, University of Engineering & Technology, Lahore, Pakistan

Abstract– Mobile wireless communication is improving and getting mature day by day. Due to this, we need the development of high broadband wireless access technologies. The 3rd Generation Partnership (3GPP) standard is developing System Architecture Evolution (SAE)/Long Term Evolution (LTE) architecture for the next generation mobile communication system. Many organizations are working to shift 3GPP LTE to LTE-A network, leading to 4th generation (4G) mobile networks. The present study conducted a literature review on security architectures of 3GPP, LTE and LTE-A networks. 3GPP, LTE and LTE-A network security issues are also studied.

Keywords— 3GPP, LTE, LTE-A, Review, Vulnerabilities, EPC, E-UTRAN and MTC Devices

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