volume 5 ~ issue 10

This research entails the use of reliability analysis for predicting failures of machines used in the cement industries and was done by evaluating machine down times data. This research work was necessitated by the need to accurately predict failures of the machines used in the cement industries and come up with an effective planning, for preventive maintenance schedule and reducing down times through developed mathematical model for the machines. The failure frequency variation with time was determined and a regression analysis using least squares methods. Correlation was done to ascertain the suitability of linear regression of the data and also to determine that, the independent variable is a good predictor of the dependent variable............

Keywords - Reliability, Failure rate model, Prediction, Weibull, Critical components, Down-time.

By the methods of the physic-chemical analysis as well the measurements of microhadness and picknomentric density the semiconducting system InTe-Cu2ZnSnS4 has been investigated and its state diagram has been plotted. Guazibinarity of the system with restricted homogeneous fields has established on the basis of both initial components. The boundaries of solid solutions at 300K reach on side of InTe ~ 2mol% and on side of Cu2ZnSnS4 ~ 13mol%. The coordinates of the system eutectic correspond to the composition ~23mol% Cu2ZnSnS4 and temperature ~813K...............

Keywords -Phase diagram, quaribinary system, dispersion of electros and phonons, thermoelectric efficiency

At high velocities, such as on highways, the relative velocity between the oncoming wind and side winds is very high. The high velocity winds that act on the bumper induce certain stresses on it. These stresses may cause deformation of the bumper; if this deformation exceeds a predesigned value, the functionality of the bumper may be hampered. This may result in safety issues and other design issues. In this paper, the effect and nature of these stresses have been quantified by conducting a wind-induced stress analysis on a model of the bumper. The bumper selected is that of Jeep Wrangler and the modelling is done on Creo 2.2. The CFD simulation and structural analysis is conducted on Ansys Workbench 15. The structural analysis and fluid flow data is summarized alongwith the deformation and induced stress values.

Keywords -Wind-induced stress analysis, Ansys Workbench 15.0, structural analysis, Jeep Wrangler

The article puts forward an approach to compute cubic uniform B-spline by means of combination of digital logic circuit and presents a scheme for the circuit design. By deducing relationship between cubic uniform B-spline basis and the Bernstein basis of Bezier curve, the article discloses that a cubic uniform B-spline can be a linear combination of Bezier curves. Based on such fact, a design for high-speeded B-spline generator is presented in the article. The designed generator is of high speed and can be applied on development of graphics and image process, robotic and CNC systems and other related areas.

Keywords -B-spline, computation , Embedded system, digital logic circuit

Automobile systems today is going through major changes and as concert to comfort the suspension system and it's working is very important. The study of four link suspension system and dynamic analysis are discussed in this paper. This paper discusses the design problem of vehicles using four-link suspension systems with the aim of totally optimizing vehicle handling and stability. Since this problem includes many evaluation items, and Four-link suspension system has interconnected behaviour, the optimization is so complicated. An efficient and computable model is indispensable for compromising the total optimization. This paper investigates a structure of objectives, introduces appropriate simulation models for respective items; we apply multi body dynamic analysis to plot the varies terms such as wheel travel, camber angle, caster angle, toe-in, toe-out etc. The result of optimization calculation shows the validity of the optimization model.

Keywords -Four link suspension system, Multi body dynamic analysis (MBD), Lower Centre Point(LCP), Instantaneous Centre Radius (ICR)

The purpose of the study was to identify strategies for improving students' acquisition of practical skills in Electrical Installation and Maintenance Work Trade in technical colleges of Kano State with a view to finding out ways of optimizing practical skills acquisition among students. The study was guided by three research questions and three null hypotheses. A descriptive survey was used as the design of the study. The population of the study comprised 24 school administrators, 22 trade teachers, and 208 final year students making a total of 254. The entire population of 254 was used as the sample for the study..................

Keywords - ........................

In this study we investigated electrical and optical properties of heterojunctions made of aluminum doped Zinc oxide (ZnO) nanorods and 4% Boron doped p-type silicon (p-Si). ZnOnanorods were grown by a chemical bath deposition (CBD) techniqueon a seed layer of ZnOsputtered on p-Si. Aluminum doping was achieved by incorporating 0-20% of aluminum nitrate in the chemical bath precursor solution. Room temperature photoluminescence showed a systematic decrease in the defect peak at 560 nm with increasing doping. Band gap was measured using UV-VIS spectroscopy shows that the band gap increased from 3.31 eV to 3.58 eV as the doping is varied from 0-20%.....................

Keywords - Aluminum, doping,Band gap, Barrier height, Ideality factor, ZnO nanorods

This paper presents a real-time practical implementation for an online protection and diagnosis technique for induction motor stator faults. The Artificial Neural Network (ANN), the wavelet packet transform (WPT)-algorithms are developed as based approaches for protecting and diagnosing various stator faults occurring in three-phase induction motors. These approaches are based on the entropy of the WPT-coefficients of line currents using an optimized mother wavelet 'db3' at the second level of resolution with thresholds determined experimentally during the various conditions of the motor............

Keywords -WPT,ANN,Entropy, IM, Flagging message, Fault diagnosis.

The purpose of this study was to determine and analyze the policy learning of mineral mining management in PT. Billy Indonesia Southeast Sulawesi, Indonesia. Data gathering techniques used Consultation procedure, public participation, in-depth interviews and focus group discussions. Method of data analysis used qualitative approach. The result of this study showed that through the empowerment of the rural fund management, the actors of the government learned about the authority and how they should carry out their duties and functions. Actors from elements companies and non-governmental learn about rights and obligations in mining management, as well as learn about the development of community-based program and budget in the area of mineral mining, and the development of local institutions to community development and social conflict resolution in a rational and democratic.............

Keywords -WPolicy Learning, Mineral Mining Management..

Natural radioactivity of sixty sachet waters produced by fifteen different enterprises was measured by gamma spectrometry technique. The concentrations of the main natural radionuclides, 40K, 226Ra, and 232Th in the samples varied respectively from 0.87 to 5.70 Bq/L, 0.16 to 0.47 Bq/L and 0.17 to 0.60 Bq/L in the samples with mean values respective of 2.66± 0.60 Bq/L, 0.22± 0.65 Bq/L and 0.34± 0.07 Bq/L. The annual effective doses due to the ingestion of these radionuclides varied from 45.48 to113.07 μSv/y with a mean of 78.41± 15.51 μSv/y. The mortality and morbidity risks assessed in samples, varied respectively from 4.9410-5 to 1.1710-4 and 7.2010-5 to 1.2410-4 with average values of 6.7510-5 and 9.8410-5. This study showed a morbidity risk relatively high, thus harmful for the population.............

Keywords -Mortality risk, morbidity risk, sachet drinking water.

The purpose of study was to analyze and explain the effect of profitability on firm value. The data used in this study was secondary data obtained from a manufacturing company located in the Indonesia Stock Exchange. The population of this research is manufacturing various industry sub-sectors listed in Indonesia Stock Exchange as research objects. Period manufacturing various industry sub-sectors used in the study covers a period of six years, i.e. 2009 to 2014. The method of data analysis used in this study was path analysis which is a multiple regression equation groove connected simultaneously, and technical analysis the data in this study using analysis software SmartPLS 2.0. The results of data analysis proves that the profitability has affect the firm value because the value is a positive on the achievement of profit to justify the payment of dividends, so the stock price will increase because the company showed a positive signal to pay dividend.

Keywords -Profitability, Firm Value.

The study is carried out in order to measure the effectiveness of "Geometer's Sketchpad software" inside the classroom environment and analyzed how this training is helping high school students while solving mathematics problems. In order to measure the effectiveness, regression and co-relation analysis has been done and finally the mean responses have been analyzed to evaluate the method effectiveness correctly on SPSS computer statistic program.

Keywords -Geometer's Sketchpad software, Mathematics.

Safety aspect in automotive engineering is of prime importance. Effective Braking system along with good suspension systems, good handling and safe cornering is very important for determining the performance of the vehicle. The objective of this work is to design, analyze and investigate the strength and stiffness of the brake calliper during braking operation using ANSYS Workbench 15.0This analysis is further used to identify the critical locations of low stiffness on the brake calliper and also aimed at evaluating the performance of brake calliper under severe braking conditions. Hence best suitable design is suggested based on the performance and strength criteria..

Keywords -Brake calliper, Braking system, Analysis

The sun irradiance (G) and temperature (T) are the two main factors that affect the output power gained from the photovoltaic (PV) DC–DC converter. Therefore, to enhance the performance of the overall system; a mechanism to track the maximum power point (MPP) is required. Conventional maximum power point tracking approaches, such as observation and perturbation technique, experience difficulty in identifying the true MPP. Therefore, intelligent systems including fuzzy logic controllers (FLC) are introduced for the maximum power point tracking system (MPPT)................

Keywords -Adaptive neuro-fuzzy system;MPPT; Converter; Photovoltaic

In manufacturing process of jet pipe electro-hydraulic servo valve, it must be having a lot of errors in the inner wall of servo valve components, which fluid flows will have a certain roughness. Jet pipe electro-hydraulic servo valve, in fact, can use variety of fluid during its working. With CFX software, this article studies effect of surface roughness of parts and working fluid on pressure characteristics of amplifier of pilot stage in jet pipe servo valve. Through mathematical models and simulation, it is shown that effect of wall roughness of parts on flow characteristics of the pilot stage amplifier is much............

Keywords -Rough surface; Smooth surface; Fluid; Amplifier.

The article deals with the analysis of formability of deep-drawing DC06 steel sheets. The aim of the investigations is to verify possibilities of formability of sheet metal with thickness of 0.85 mm. The mechanical parameters of the sheets have been determined in uniaxial tensile and bulge tests. The numerical simulations using AUTOFORM has been carried out for two drawpiece models. Obtained results can be used during the simulation of real forming process.

Keywords -Formability, numerical simulation, steel sheet.

This work shows the optimization of two different types of plastic materials to measure a response variable, in order to select the best material that accomplishes the customer´s requirements in a company in the appliances sector. Factorial designs are an effective tool applied to compare two or more materials in order to choose the one that best accomplishes the requirement. The 24 factorial experimental design aims to study the effect of various factors on one or more response variables when it is necessary to know all factors. Factors considered in this case were: plasticity temperature, pigment, injection time and injection pressure. The objective of this work was to minimize weight as the response variable, this study was conducted between two plastics types: low-density polyethylene and nylon.............

Keywords - ANOVA, Design of experiments, Polyethylene Low-Density, Nylon, Weight.

Data mining works to extract information known in advance from the enormous quantities of data which can lead to knowledge. It provides information that helps to make good decisions. The effectiveness of data mining in access to knowledge to achieve the goal of which is the discovery of the hidden facts contained in databases and through the use of multiple technologies. Clustering is organizing data into clusters or groups such that they have high intra-cluster similarity and low inter cluster similarity. This paper deals with K-means clustering algorithm which collect a number of data based on the characteristics and attributes of this data, and process the Clustering by reducing the distances between the data center. This algorithm is applied using open source tool called WEKA, with the Insurance dataset as its input.

Keywords -Clustering, Centroid, Data Mining, knowledge discovery, K-means, WEKA.

This paper presents the performance analysis of apodized fiber bragg an optical communication system. The effected fiber bragg for capacities uniform, Gaussian and tanh capacity has been implemented and investigated. The variable file of FBG performance is talented for the distinctive apodized capacity, including utilization in the RZ beat generator. The corresponding framework throughout the fiber mode channel is simulated using optisystem version 9 programs. Results show a fit correlation for the range, eye diagram and Q-variable figure

Keywords -Optical Communication,FBG, Optisystem9, Spreading, Q-Factor.

The paper describes an automatic climate in offices, describes the principles of the automation equipment climate, considered air parameters described control algorithms were compared automation system PID- controller and using fuzzy logic controller is designed microclimate model in Mathlab program with a fuzzy logic controller.

Keywords -Conditioner, fuzzy logic, HVAC, Mathlab, PID-regulator, ventilation