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Volume 3 Issue 5 (May 2016)

S.No. Title & Authors Page No View
1

Title : Evaluation of Fuzzy Logic Control Technique for DC Motor Drives Using MAT LAB/SIMULINK

Authors : Vibhuti Kumar, Pankaj Kumar, Shashi Kumar, Abhishek Verma, Dr. Akhilendra Yadav

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Abstract :

High efficiency due to reduced  losses, low  maintenance and low rotor inertia of the  dc motor have increased the demand of DC motors in high power servo and robotic applications. With the advent of controllers like fuzzy logic, which can convert linguistics control variables based on expert knowledge or practical results into desired control strategies. So it can be applied for various control system with uncurtained and unmodelled dynamics. This paper proposes three types of fuzzy logic controllers for DC motor drive using Mat lab/Simulink and presents a comparative study of performance specifications of PI and PID controllers and three fuzzy logic. The steady and dynamic characteristic of speed and torque are effectively monitored and analysed. The aim of fuzzy logic controllers is to obtain improved performance in terms of disturbance rejection or parameter variation than obtained using classical controllers. The fuzzy self-tuning approach implemented on a conventional PID structure was able to improve the dynamic as well as the static response of the system. Comparison between the conventional output and the fuzzy self-tuning output was done on the basis of the simulation result obtained by MATLAB. The simulation results demonstrate that the designed self-tuned PID controller realize a good dynamic behaviour of the DC motor, a perfect speed tracking with less rise and settling time, minimum overshoot, minimum steady state error and give better performance compared to conventional PID controller.

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2

Title : A Novel Enrolments Forecasting Model Based On Automatic Clustering Techniques and Time-Variant Fuzzy Logical Relationship Groups

Authors : Nghiem Van Tinh, Nguyen Cong Dieu

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Most fuzzy forecasting approaches are based on model fuzzy logical relationships according to the past data. In this paper, a hybrid forecasting model based on two computational methods, time-variant fuzzy logical relationship groups and clustering technique, is presented for academic enrolments. Firstly, we use the automatic clustering algorithm to divide the historical data into clusters and adjust them into intervals with unequal lengths. Then, based on the new intervals, we fuzzify all the historical data of the enrolments of the University of Alabama and calculate the forecasted output by the proposed method. Compared to the other methods existing in literature, particularly to the first-order fuzzy time series, our method gets a higher average forecasting accuracy rate than the existing methods.

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3

Title : The study of behavior of epoxy matrix composites reinforced Glass fiber against impact loads with low energy

Authors : R.Karimdadashi, F.Azimpour Shishevan

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Abstract :

The study of composites Impact behavior is of high importance, Due to high sensitivity of these types of composites against impact loads. In this research the reaction of carbon fiber reinforced polymer (CFRP) composites against impact loads with different energy values has been examined. Therefore, using vacuum assisted resin transfer molding. (VARTM) the desired composites manufactured in 700*700 mm dimensions and were cut in accordance with ASTM D7136 standard using water jets. The cut samples were impact loads at different energy levels. The test results were illustrated contact force-time curves as energy-time and velocity-time curves for different energy levels. In this study, Profile energy method was used in order to obtain penetration and perforation threshold energy. Finally key parameters of low energy impact such as maximum absorbed energy, maximum speed, and test duration time were compared for different energy levels. According to results the penetration threshold energy and perforation threshold energy values of carbon fiber reinforced polymer (CFRP) composites are 60 and 80 joules respectively. According to the results by increasing the energy level to penetration threshold point the amount of absorbed energy also increased and reached its maximum level. After reaching to this point the absorbed energy is reduced with increasing impact energy.

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4

Title : Proteolysis, Texture and Microstructure of Goat Cheese

Authors : Burgos L., Pece N., Maldonado S.

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Changes in the structure of cheese are mostly due to changes in the protein matrix, mainly because of the degradation of α- and β- and k-casein. Therefore, the objective of this work was to study the effect of proteolysis on the microstructure and texture of goat cheese during ripening. The cheeses were made using Creole goat milk from the Quebrada de Humahuaca in Jujuy and ripened at 10 °C and 90% RH. Samples were taken after 5 hours of preparation and after 10, 20, 30, 40, 60 and 80 days of ripening. Proteolysis was studied by the evolution of the major fractions of casein (α, β and para-κ) determined by HPLC and soluble nitrogen, allowing the calculation of the rate of maturation. The texture profile was determined using a texture analyzer QTS 25. The changes in the protein matrix of the cheese were observed by scanning electron microscopy using a JEOL JSM-6480 LV. We found that the α-casein was hydrolyzed at a low speed at the beginning and until 30 days, between 30 and 40 days of ripening, α-casein was hydrolyzed faster. After this time, this fraction content became stable until the end of the ripening. The rate of hydrolysis of para-κ-casein increased starting from 30 days up to 60 days of ripening, when it became stable. It was observed that the initial matrix of cheese protein was formed by free large cavities with a heterogeneous dispersion of casein particles. During ripening, the size of the cavities decreased and the cheese protein matrix became more compact. The size of the holes was reduced and the globular characteristic of the micelles was lost after 40 days of maturation, coinciding with accentuated hydrolysis α-caseins. The soluble nitrogen at pH 4.6, increased significantly until 30 days. After that, it remained statistically unchanged for 80 days. The velocity of maturation determined as soluble nitrogen in TCA, rose steadily until 60 days of ripening. Hardness, gumminess, adhesiveness and chewiness increased sharply at 40 days of maturation. After this time, these parameters increased slowly until the end of the sampling period, when the changes in the microstructure of the cheeses revealed the highest compaction of the matrix. This may be related to the formation of soluble nitrogen and degradation of α-caseins during ripening.

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5

Title : Dialdehyde starch orthoaminopyridine Schiff base Preparation, Characterization and its adsorption of Cr(Ii), Mn(Ii) and Cu(Ii) ions from aqueous solution

Authors : A. A. Salisu, H. Kaila, A. S. Umar

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This document gives formatting guidelines for authors preparing papers for publication in the International Journal of Engineering and Applied Sciences. The authors must follow the instructions given in the document for the papers to be published.  The margins must be set as follows: Top = 1.7cm, Bottom = 1.7cm, Left = 1.7cm, Right = 1.7cm. Paper Title must be in Font Size 22, with Single Line Spacing. Authors Name must be in Font Size 11. Abstract should contain at least 250 words. Abstract explanation should be Times New Roman font, 09 Size, Bold, Single line spacing, text alignment should be justified. References and Author’s Profile must be in Font Size 8, Hanging 0.25 with single line spacing.

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6

Title : Selective froth flotation concentration of antimonite ore from a mixture of antimony, lead and arsenic ores

Authors : Nyakubaya Keith, Muleya Edwina, Mutatu Washington

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Mineral ore beneficiation and value addition has become a key factor for economic growth in Africa. Froth flotation process is used to concentrate relatively low grade ores. In Zimbabwe antimonite is mined together with lead and arsenic which are regarded as contaminants and hence the need to selectively remove them. We report on the selective concentration of antimonite at the expense of lead and arsenic by use of a depressant. Starting with an containing antimony (5.89%), lead (0.34%) and arsenic (0.25%) a concentrate containing antimony 30.68%, lead 1.52% and arsenic 0.85% was obtained without an depressant in a Devnver flotation cell. The addition of a depressant resulted in a concentrate with antimony 24.89%, lead 0.90% and arsenic 5.89%. The Flame Atomic Absorption Spectroscopy (FAAS) and X-Ray Florescence (XRF) analytical techniques were used to measure the changes in concentrations of antimony, lead and arsenic during this research. 

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7

Title : Computing and Investigating Permutation Characters

Authors : Saad Owaid Bedaiwi, Maroa Salah AL-shammery

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This work splits into two parts; in the first we present three actions and formulate them into GAP's codes, then we compute and investigate the associated permutation representations and its characters "permutation characters". In the second part, with the aid of the Meataxe GAP's package, we present a method and algorithm for investigating irreducible and permutation characters for a specific kinds of finite groups.

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8

Title : Fabrication of TiO2 Doped ZnO UV Detector by Pulse Laser Deposition

Authors : Samar Y.AlDabagh, Kadhim.A.Aadim, Thura tariq abbas

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In this work TiO2 doped with ZnO(5% , 7%)  thin films were  grown by pulse laser deposition technique on P-type (Si)substrate  at RT under vacuum 10-2 mbar. The properties of the photovoltaic detector with the increase of  ZnO concentration  is studied. All the films display photovoltaic in the near visible region. It was observed that the responsivity increased to 3.39 at  RT and to 3.82 after annealing  at 500 ºC with  the increase of ZnO concentrations from (5% to 7%).The Specific efficiency increases with the increase of ZnO concentration at  RT 10.9and after  annealing to 12.3.

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9

Title : Medical Effects and Extraction of Apis Mellifera. L in Southern Albania

Authors : Xhejni Borshi

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Bee products have attracted the attention of consumers and researchers due to their curative properties and their chemical composition. Propolis (Apis Mellifera, L) is one of the bee products which are formed by mixing the wax and resinous substances with glycosidase enzyme present in the spit of bees. This product is used by bees to protect the hive from external inflows, pollution and keeps under control the temperature of the bees hive. Studies have shown that propolis presents a high number of biological and pharmacological properties as antimicrobial, antioxidant, anti-inflammatory, anticancer. In this study the extractions of propolis are carried out by liquid CO2 under pressure at 00C, 200C and 400C. Propolis is collected in the southern Albania and the amount used for every the extractions is about 16 grams. The extraction carried out at 400C gave the best yield of 9.5 %, whereas the extractions at 00C and 200C gave rise to lower yields of 1.9 % and 4.9 % respectively.

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10

Title : Modelling of Thin Layer Drying Kinetics of Tomato (Lycopersicon esculentum Mill) Slices under Direct Sun and Air Assisted Solar Dryer

Authors : Oyerinde. A.S.

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Drying experiments were conducted using direct sun drying and indirect passive solar dryer to simulate the drying processes of tomato slices, Tomato slices of 3mm thickness were placed on perforated stainless steel trays in a thin layer and dried to equilibrium moisture content. All samples were dried from an initial moisture content of 95.4 %wb to 10.2 %wb for sun dried samples and 8.5 %wb for solar dried samples. The drying data were fitted with ten published thin layer drying models. Selection of the best model was achieved by comparing the coefficient of determination (R2), reduced chi-square (χ2) and root mean square error (RMSE) between the experimental and predicted values. The diffusion coefficient and activation energy were determined using the Arrhenius equation. The results showed that the Page model was found to best describe both the sun and solar drying kinetics of tomato slices under the conditions tested. Effective moisture diffusivity was 5.07×10-7m2/s for sun dried and 2.32×10-7m2/s for solar dried tomato samples, while activation energy ranged from 32.38 to 33.53 kJ/mol for sun dried and 39.14 to 42.12kJ/mol for solar dried samples, respectively. It was concluded that the Page model is applicable to predict moisture content of tomato slices during direct sun and solar drying of tomato slices.

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11

Title : Sensitivity analysis of intervertebral disc parameters: MBS model of the lumbar spine

Authors : Sabine Bauer, Eva Keller, Dietrich Paulus

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The range of possibilities to investigate the biomechanical behavior of human biological structures is manifold. The classical investigation methods such as e.g. experimental studies and image processing are complemented by the biomechanical computer modeling. These different investigation methods represent their own fields of research, but a comparison of the results can be used to validate the applied method. Also explored material properties of different structures can be used, for example in the computer modeling, as input parameters. In order to ensure a realistic modeling, the knowledge of the influence of the structure-specific parameters on the biomechanical behavior of the entire model system is required. Especially the biomechanics of the intervertebral discs is seen in the literature as a central component of a spine model. Therefore, a detailed analysis of the impact of an input parameter variation is necessary. By means of a multibody simulation (MBS) model of the human lumbar spine, the impact of modified disc stiffness onto the spinal structures has been investigated. The used stiffness values ​​are obtained from published literature. The model takes the biomechanical properties of the spinal structures such as the intervertebral discs, the fact joint and the ligamental structures into account and has been validated by comparing the results with results from appropriate literature. To analyze the effects of different input parameters variations on the biomechanical behavior of spinal structures, the upright standing is simulated.

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12

Title : Ultra Wide Band Low Noise Amplifier for Communication Receivers in 0.18 um CMOS technology

Authors : Maryam Vafadar

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This paper presents an inductorless low-noise amplifier (LNA) design for an ultra-wideband (UWB) receiver frontend. A current-reuse gain-enhanced noise canceling architecture is proposed, and the properties and limitations of the gainenhancement stage are discussed. Capacitive peaking is employed to improve the gain flatness and 3-dB bandwidth, at the cost of absolute gain value. The LNA circuit is fabricated in a 0.18-µm triple-well CMOS technology. Measurement result   good  matching in the implementations and a small-signal gain of 11 dB and a 3-dB bandwidth of 2–9.6 GHz are obtained. The LNA consumes 19 mW from a low supply voltage of 1.5 V. It is shown that the LNA designed without on-chip inductors achieves comparable performances with inductor-based designs. The silicon area is reduced significantly in the inductorless design, the LNA core occupies only 0.05 mm2, which is among the smallest reported designs.

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13

Title : Application of the resolution of the characteristic-free resolution of Weyl module to Lascoux resolution in case (6,6,3)

Authors : Haytham R. Hassan, Mays M. Mohammed

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In this paper we study the relation between the resolution of Weyl module  in characteristic-free mode and in the Lascoux mode (characteristic zero), more precisely we obtain the Lascoux resolution of  in characteristic zero as an application of the resolution of  in characteristic-free.

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14

Title : Kothe-Toeplitz and Topological

Authors : J.K. Srivastava, R.K . Tiwari

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This paper  is in continuation of [4]. Here we characterize generalized Kothe-Toeplitz duals of the matrix classes and by application of these dualsof the matrix  spaces.

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