Volume 6, Issue 2, February 2015

A Methodology Development of Defining Productivity Rate and Losses Analysis in Screen Printing Processing Line

A. Jeffrey, R. Usubamatov and M. Saifuldin

School of Manufacturing Engineering, Universiti Malaysia Perlis, Pauh Putra-02600, Arau, Perlis, Malaysia

Abstract– Productivity reserves many different opinions and concept but in every way it connects through the idea of continuous improvement and lean manufacturing in order to have more capability. The productivity capability in a real situation needs to be measured and understandable to be interpreted by a manager in an industry which the methodology of approaching the measurement is through a mathematical modeling. Hence, the knowledge of productivity is very crucial for manufacturing department to ensure that they achieve their goals especially costing in a much higher competitive market nowadays. This study offers a readable results of diagram that shows the losses categories that the department can focus on which its production losses are shown to be improve and perform corrective actions against the highest losses area. At the same time, productivity indices with calculations also will be define inside to have a measure of capability from time to time, in the form of performance key indicator for the department itself. Productivity is reflected in many possible ways bringing many practices such as Kaizen, Kanban, Just In Time, Plan-Do-Check-Act cycle which the objective of the practices approach are going to the same agenda that is improving the productivity in overall forms. Mathematical modeling of productivity is very important to figure out the peak of productivity possible that is always based on the limitation of the technological processes or machine ability. Unrealized losses seems to haunt all Manufacturing Managers, Engineers, and also the Managements of the organization thus creates lost of focus in capturing the bigger image in the organization itself , the real bigger losses area regime. Hence, the knowledge of productivity concept is very important in manufacturing that each management has to learn and optimize the investment made that it can create a faster return of investment to gain in the business.

Keywords— Productivity Rate, Analysis and Screen Printing

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The Efficiency of the Financial Market by the Multi- Approximate Entropy: Case of the Tunisian Financial Market

Talbi Mariem and Sahli Lamia

International Finance Group Tunisia, Faculty of Management and Economic Sciences of Tunis, Tunisia, El Manar University, Tunis Cedex, C.P.2092, Tunisia

Abstract– The object of this paper is to study the efficiency of the Tunisian financial market; we propose to study the efficiency of the market from the point of view of the informational entropy. The basic idea is that, rather than to be a concept that in the classical economics, the variations of efficiency of the market in the course of time and on horizons of time. Within this framework, the efficiency of the market is measured in terms of models contained in the sequence of the changes of price compared to the models in a random order In agreement with the ideas of financing of the evolution, the empirical results of the Tunindex index, observed over the period which is spread out of 2008 up to 2012, showed that the degree of efficiency of the market varies in time and depends on the scale of time In general, the Tunindex index is more efficient for short-term (approximately days) that for in the long run (approximately month and quarters) of the scales of time. In addition, the efficiency of the market presents a cyclic behavior with two periods dominant to knowing the period of the financial crisis 2008 and the events of 2011.

Keywords— Efficiency of the Financial Market, Multi Approximate Entropy and TUNINDEX Index

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The Impact of Corporate Governance on the Performance of the Firms: A Study of Pakistani Pharmaceutical Industry

Wasif Ammar and Saqib Ilyas

Department of Business Administration, University of Gujrat, Pakistan

Abstract– This study is initiated on “corporate governance and performance of the firms” with the samples of 8 pharmaceutical companies, using the data from their annual reports- from a time period of year 2008 – 2012. Board committee, board meeting and board size including executive directors and non-executive directors were used as the determinants of corporate governance whereas return on assets (ROA) and return on equity (ROE) were used as the measures of firm performance. The study found that determinants of corporate governance are not correlated to the performance measures of the organization. Regression model showed that corporate governance do not affect companies’ return on assets (ROA) and return on equity (ROE). Further recommendations are also put forwarded in the research.

Keywords— Corporate Governance, Firm Performance, Board Size, Board Committee and Board Meeting

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A Review of Pre-Coding Based System to Reduce PAPR in OFDMA

Iqra Sattar, Muhammad Shahid and Mohsin Khan

Department of Computer Science, University of Lahore (Sargodha Campus)
Department of Electrical Engineering, Pakistan Institute of Engineering and Applied Sciences

Abstract– OFDMA is promising technique for new high speed wireless data networks. It provides high speed data transfer with high spectral efficiency and noise immunity for in band and out band spectrum. Multiple slow speed data streams can be transmitted simultaneously. But the main problem associated with this type of networks is PAPR. PAPR occurs due to limited linear operation of high frequency power amplifier. This drawback is so severe that all the advantages of OFDMA become unattractive. However this problem can be overcome by pre-coding technique that is presented in this paper and the fruits of OFDMA can be enjoyed.

Keywords— Walsh-Hadamard Transform (WHT), Discrete Hartley Transformation (DHT), Zadoff-Chu Transformation (ZCT), Discrete Fourier Transformation (DFT) and Bit Error Rate (BER)

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Batch Sorbtion of Zn2+ and Cd2+ from Wastewater using “Kosovo” Clay as a Low Cost Adsorbent

Teuta Selimi, Makfire Sadiku, Melek Behluli, Naim Hasani and Avni Berisha

Department of Chemistry, Faculty of Natyrale Sciences, University of Prishtina, Kosovo
Faculty of Economics, University of Prishtina, Kosovo
Departament Hydrotecnics, Faculty of Engineering and Architecture, University of Prishtina, Kosovo

Abstract– Kosovo clay in its natural and treated form, obtained from Kamenica, state Kosovo was utilized as a low-cost adsorbent for Zn2+ and Cd2+ ions from solution. Experiments were carried out as a function of initial concentration of ions and contact time with clay while the amount of adsorbent was kept unchanged. From the results obtained, it was found that the removal of ions depends on concentration and contact time. In treatment with clay, the removal of metal ions from sample is high whereby the percentage of removal is more than 90 percent of the initial concentration. The efficiency of the untreated clay for the removal of heavy metal ions from solution is greater than that of clay treated with sulfuric acid. The adsorption isotherms could be fitted well by the Langmuir model. The 𝑅𝐿 value in the present investigation was less than one, indicating that the adsorption of the metal ion onto this clay is favorable.

Keywords— Natural Clay, Treated Clay, Adsorbtion, Zn2+, Cd2+, Equilibrium and Isotherm

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Need of Flow Assurance for Crude Oil Pipelines: A Review

Anand Gupta and Anirbid S.

ONGC and PDPU, India

Abstract– Flow assurance involves ensuring fluid flow in well, flowline and trunkline. Transportation of heavy/waxy crude oils with high viscosity makes flow through pipelines difficult and challenging. Furthermore, waxy oil transportation from the wellhead to the refinery gate is becoming important as their production has to be ensured through flow assurance. Huge amount of capital is spent annually by the petroleum companies for the prevention and removal of wax in production and transportation lines. It has been established that n-paraffin’s are predominantly responsible for this problem. These solid particles deposit in production tubing, pipelines, processing equipments and eventually cause plugging in the operations.

Keywords— Flow Assurance, Wax Deposition and Thermodynamic Models

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