bluuebunny/crossref_metadata_2025 huggingface dataset:
Biodiesel from Sesame oil: Base catalysed transesterification
Authors: Ferdous Kaniz , Uddin Mohammad Rakib
Published: October 2013

A process for the production of methyl ester from Sesame oil containing 6.1% free fatty acid (FFA) for the use as a biodiesel was studied. These studies were carried out on transesterification reaction of Sesame oil with methanol to produce biodiesel. The reaction parameters such as Methanol/Oil molar ratio, catalyst concentration and reaction time were optimized for the production of sesame oil methyl ester (SOME). Conversion of triglyceride has been monitored from viscosity measurement and also by measuring produced glycerin concentration. Pseudo first order kinetic model has been proposed for the transesterification of Sesame oil to biodiesel and the data are fitted with the model to evaluate the kinetic parameters. Biodiesel properties such as cetane number, kinematic viscosity, flash point, pour point, cloud point are measured and compared with biodiesel and petro-diesel standard.
Comparison of Performance of Magneto Hydrodynamics Generator in Presence of Hall Effect
Authors: Khatibzadeh Ahmadali , Alizadeh Pahlavani Mohammad reza
Published: October 2013

Studying of high-temperature plasmas exposed to strong electromagnetic ?eld is Magneto Hydrodynamics. Also, it is used to obtain an electrical power. This paper proposes a simple model of MHD generator. Moreover, efficiency of different configuration of this generator is obtained by this model. Also, this paper compares different configurations of Faraday generator with the Hall generator based on their isotropic efficiency. Moreover, this model considers the effect of Hall Effect (Ion slip) on the efficiency. This analysis proof that Hall Effect decrease the efficiency in Faraday generator but increase the efficiency in the Hall generator.
DWT-based Illumination Normalization and Feature Extraction for Enhanced Face Recognition
Authors: K Manikantan , Shet Milan  S , Patel Minal , S Ramachandran
Published: October 2013

Face recognition (FR) under varying lighting conditions is challenging, and exacting illumination invariant features is an effective approach to solve this problem. In this paper, we propose to utilize Discrete Wavelet Transform (DWT) for normalizing the illumination variance in images as well as for feature extraction. Individual stages of the FR system are examined and an attempt is made to improve each stage. A Binary Particle Swarm Optimization (BPSO) based feature selection algorithm is used to search the feature space for the optimal feature subset. Experimental results, obtained by applying the proposed algorithm on YaleB and Color FERET face databases, show that the proposed system outperforms other FR systems. A significant increase in the recognition rate and a substantial reduction in the number of features is observed. Dimensionality reduction obtained is more than 99% for both YaleB and Color FERET databases.
Design of Broadband Dispersion Compensating Photonic Crystal Fiber
Authors: Habib Md. Selim , Habib Md. Samiul , Razzak S.M.A , Khan M.A.G
Published: October 2013

This paper presents a triangular-lattice photonic crystal fiber for broadband dispersion compensation. The finite element method with perfectly matched absorbing layers boundary condition is used to investigate the guiding properties. The designed dispersion compensating fiber shows that it is possible to obtain a larger negative dispersion coefficient of ?360 ps/(nm.km) at 1.55 ?m, better dispersion slope compensation, better compensation ratio in the entire telecommunication (1460-1640 nm) band by using a modest number of design parameters and very simple cladding design.
Optimization of Surface Roughness When Turning Polyamide using ANN-IHSA Approach
Authors: Madic Milos , Markovi? D. , Radovanovi? M.
Published: October 2013

This study presents an approach by coupling artificial neural network (ANN) and improved harmony search algorithm (IHSA) to determine the optimum cutting parameter settings for minimizing surface roughness when turning of polyamide material. An ANN model surface roughness was developed in terms of cutting speed, feed rate, depth of cut, and tool nose radius using the data from the turning experiment conducted according to Taguchis L27 orthogonal array. The optimal cutting parameter settings were determined by applying the IHSA to the developed ANN surface roughness model. The results show that the proposed optimization approach can be efficiently used for optimization of cutting parameter settings when turning polyamides. Although determining ANN and IHSA parameters is quite complex and problem dependent, it can be simplified by using Taguchis experimental design as in this study.
Calculation of Resonating Frequency of an Equilateral Triangular Microstrip Antenna Using Artificial Neural Network, �This paper has been withdrawn�
Authors: Gupta Prachi , Singhal P.K. , Gupta Ritambhra
Published: October 2013

This paper has been withdrawn.
Establishment of porosity and permeability models correlation to validate E.coli Transport to ground water aquifers: Rivers state of Nigeria
Authors: Eluozo Solomon Ndubuisi , Ademiluyi J. O.
Published: October 2013

The evaluation of porosity and permeability models correlation on the migration of e.coli transport in deltaic environment has been assessed. This is to validate the model generated from the experimental analysis in the study location, this model are generated through the experimental results from both parameters, the theoretical values from both parameters confirm that the models generated is a bench mark that can be applied as a design criteria in preventing the migration of e.coli to ground water aquifer, it has also confirm that it plays a major role in fast transport of e.coli in deltaic environment, the figures displayed shows the level of deposition of geological formation in the study area, the study has also explain the migration of the microbes influenced by porosity and permeability, the results from the experiment that generated theoretical values for porosity and permeability were evaluated to see their relationship in terms of influence on the behaviour of the microbial transport as a system known as plug flow. the results has been confirm that without any inhibition from any other deposition, e.coli will be in progressive phase condition, therefore it is advise that the models generated from the study area should be applied in design of bore hole in other to prevent the pollution emanating from e.coli in the study area, finally the relationships verified from the study has a fit to the existing geological history of the study area that is predominant of alluvium deposition, this condition ascertain the reality of the experimental results generated from the study area ,it should be applied to avoid water related diseases and the threat of life
Predictive models to determine the behavior of plastic and liquid limit of Lateratic soil for Raod construction at Egbema: Imo state of Nigeria
Authors: Eluozo Solomon Ndubuisi , Nwaobakata C.
Published: October 2013

Predictive values to determine the behaviour of plastic and liquid of lateritic soil for road design and construction has been developed, this two parameters has a relationship in term of soil classification through their laboratory results, both parameters sample were subjected to through laboratory analysis for several locations, the laboratory results of both parameters were plotted to determine there behavious and limits, the results generated equations at various locations, the equations were resolved and it generated theoretical values, the model values displayed there relationship on the classification of soil for road construction. The implementation of a laboratory testing proceedure is to classify subgrade material and assess sustain properties and moisture sensitivity (heavy, collapse, softening) that can influence long-term pavement performance. Testing implementation consists of classification testing, these are (i.e., gradation analysis, Atterberg Limits and sulfate tests). Generated predictive models producing theoretical values, are engineering properties of soil testing for various parameters (i.e., swell/consolidation, R-value, unconfined compressive strength, California Bearing Ratio, and Resilient Modulus Tests). This are also design parameters that should generate predictive models that can be applied as design parameter in the study area, the study is imperative because predictive models generated and validated has ascertain proof of the workability of the models as design parameter in design of flexible pavements in the study location.
Modeling of pheratic aquifers on E, coli transport influenced by preconsolidation and compressibility of soil
Authors: Eluozo Solomon Ndubuisi
Published: October 2013

The rate of pollution on soil are the major problem of ground water contamination in the study area, the influence from preconsolidation and compressibility of soil influence on E.coli transport has been carried out. This is to determine the rate of influence on E.coli transport in pheratic aquifers, mathematical model were developed to monitor the influence on the preconsolidation and compressibility of soil on microbial transports, experimental analysis were also carried out through a standard column experimental analysis, ten samples were collected in a drilling site at interval of three metres each for several location, the effluent discharge from the lower end of the column were collected and subjected to a thorough analysis, the theoretical values were compared with experimental values, and both values compared faviourably well. This study has explained the transport of E.coli base on the level of concentration generate from aquiferious zone. The study has reveal that the exploration of ground water should be design with its criterias to prevent the wild spread of water pollution emanating from the E.coli transport in the study areas, the preconsolidation and compressibility of soil were found to be insignificant on the transport of the microbes, the preconsolidation and its rate compressibility of soil could not reduce the transport of E.coli on a natural state.
Low Power and High Speed D-Latch Circuit Designs Based on Carbon Nanotube FET
Authors: Talebipoor Neda , Keshavarzian Peiman , Irannejad Behzad
Published: October 2013

In this paper we propose low power and high speed D-latche circuits base on carbon nanotube field effect transistor. D-latches are the important state-holding elements and systems performance enhancement will be achieved by improving the flip-flop latches structure. The circuit designs are simulated by Hspice .In this paper the consumption result of the circuit parameters such as delay, power and PDP for our three different D-latch circuit design in various voltages and different temperatures.
Design Of Near Zero Ultra-Flattened Chromatic Dispersion Highly Non Linear Holey Fiber In Tele Communication Band
Authors: Rahman Mahbubur , Mostazir A.H. Md. , Alam M. A. , Habib Md. Samiul
Published: October 2013

We propose a four-ring hexagonal holey fiber (HF) which exhibits near zero ultra-flattened chromatic dispersion and nonlinear property simultaneously in a modest number of rings. The finite element method with perfectly matched layers boundary condition is used to investigate the guiding properties. A four ring HF with flattened dispersion of 0.85ps/nm/km from 1.14 to 1.60 m wavelength range, 21.34W-1km-1 nonlinear coefficient and splice loss 3.82 dB at 1.55m is numerically demonstrated.
Measurement of electron number density and temperature of laser-induced Silver plasma
Authors: Musadiq Muhammad , Iqbal Munawar , Amin Nasir , Jamil Yasir , Naeem M. Asif , Shahzad Hafiz Akif
Published: October 2013

Silver (Ag) plasma generated by second harmonics (532 nm) of a Nd:YAG laser has been investigated at 17.6 mJ and 88.6 mJ energy level. The excitation temperature was determined from the Boltzmann plot method of the transition (3D3 -3P2) at 243.779 nm, (2S1/2 - 2P3/2) at 328.068 nm, (2S1/2 -2P1/2) at 338.289 nm, (2P1/2 - 2D3/2) at 520.907 nm and (2P3/2 - 2D5/2) at 546.550 nm, while the Stark broadening (SB) method was used to measure the Electron Number Density (END) of 2P3/2 - 2S1/2 transition at 827.351 nm. The spatial behavior of the Electron number density (END) and Electron Temperature (ET) was measured at ambient air pressures at different energy level and distance ranging form 0-4.5 mm form the target metal. The ET were found to be varies from 17895 K to 10593 K, while END was found to be in the ranges of 2.229 1015 to 6.44 1014 cm-3 and 1.76 1016 to 1.893 1015 cm-3 for 17.6 mJ and 88.6 mJ energy, respectively. The relationship of END and ET found directly related to laser irradiance, while they were inverse to the distance form the target material surface to laser beam source.
Design and Development of a tomato Slicing Machine
Authors: Salaudeen Kamaldeen Oladimeji , E. F. Awagu
Published: October 2013

Principle of slicing was reviewed and tomato slicing machine was developed based on appropriate technology. Locally available materials like wood, stainless steel and mild steel were used in the fabrication. The machine was made to cut tomatoes in 2cm thickness. The capacity of the machine is 540.09g per minute and its performance efficiency is 70%.
Genetic Programs of Structural Evolution of Hybrid Electromechanical Objects
Authors: V. F. Shinkarenko , Iu Gaidaienko , Al-Husban Ahmad N
Published: October 2013

In this paper the interconnected genetic models defining algorithms of intrageneric synthesis of hybrid electromechanical structures are considered. The authors analyze the space of admissible crossing and define the variety of genetically admissible classes of hybrid structures. The recommendations about the use of models in problems of a structural prediction and innovative synthesis of new versions of hybrid electromechanical objects are given.
Effect of NSPRI tin-in-pot compared with pot-in-pot evaporative cooler on the stored fruits
Authors: Salaudeen Kamaldeen Oladimeji , Uzoma Anugwom , F.F Olyemi , E.F Awagu
Published: October 2013

The suitability of the humidity chambers known as Evaporative Cooling System (ECS) developed by Nigerian Stored Products Research Institute as storage structures for mangoes were compared for nine days between June-July 2012. Ambient and ECS Temperature throughout the storage period ranges between 27?C- 31?C and 20?C-27?C respectively, while the corresponding relative humidity was 51%-58% and 70%-81% respectively. Colour change and Weight loss were observed as a physical change to determine effect of each selected ECS on the stored mangoes. There is significant range of ripening in tin-in-pot which led to early deterioration of the stored mangoes. Pot in-pot affects the freshness of the stored mangoes. The overall effectiveness of the tested ECS shows that tin-in-pot is better for the storage of mangoes since for five days, it retains the freshness of the stored mangoes but cannot be used for long due to its natural reaction with the stored fruits.
Strengthening of masonry structures using steel frames
Authors: Papalou Angeliki
Published: October 2013

Many old masonry structures have not been maintained properly and have been left exposed to future seismic loading with only their exterior masonry walls. These structures can be strengthened using different techniques with the reversible ones being more appropriate for historic structures. The seismic behavior of masonry buildings left only with their perimeter walls and retrofitted using steel frames (a reversible technique) is investigated. The role of the connection of the steel frames with the masonry walls is analyzed. Linear elastic analysis is performed using the finite element method. The seismic resistance of the aforementioned buildings increases when there is a closed-spaced connection of the steel frame columns with the masonry walls. The connection of the masonry walls at the floor level with the interior structure is also beneficial to the buildings seismic behavior.
Modelling Workability of Asphalt concrete Performance at different Temperatures using A Statistical Model
Authors: Arshad Ahmad Kamil , Diah J Md , Khalil Salah
Published: October 2013

In this study, a workability model is used to predict the values of Torque in relation to mix and compaction by Temperature, Gyration, Resilient Modulus, Stability and Flow. The data are obtained from workability-measuring devices developed by the authors. The value of R2 implies that about 95 % variation in the values of Torque can be explained by the variation in mixing and compaction according to Temperature, Gyration, and Resilient Modulus. The regression model as a whole shows that while the value of Torque is largely influenced by Compaction, Mixing Temperature and Gyration; Resilient Modulus, Stability and Flow are not significant determinants of workability. The paper recommends that the effect of workability on the performance of Asphalt concrete should be taken very seriously during the design.
Effects of Controllable Blasting Variables on Number of Boulders Generated after Blasting in Ratcon and NSCE Quarries, Ibadan, Oyo State, Nigeria
Authors: LAWAL Abiodun Ismail , Muili Akande Jide
Published: October 2013

The research work examines the effects of controllable blasting variables on number of boulders generated after blasting. The objective of the research was achieved through collection of data related to blasting which are drill hole depth, drill hole diameter, burden, spacing, average charge per hole, and specific charge. The collected data were analysed statistically using both Microsoft Excel Software and SPSS Software. The result of the analysis reveals that all the input controllable blasting variables which are drill hole diameter (X1), drill hole depth (X2), hole spacing (X3), burden (X4), average charge per hole (X5), specific charge(X6) that participated as independent variables in the models are found to be significant and the R2 values obtained from the graph show a very strong correlation between the number of boulders generated after blasting and the input variables except that of drill hole diameter which shows a very weak correlation. The equation generated using the SPSS could be used to determine number of boulders generated after blasting.
Theoretical considerations of machining with grinding wheels
Authors: Odior Andrew Oyakhobo , Oyawale Festus A , Oyedepo Sunday O. , Aasa Samson A
Published: October 2013

Grinding is one of the most versatile methods of removing material from machine parts by the cutting action of the countless hard and sharp abrasive particles of a revolving grinding wheel. It works by forcing the abrasive grains into the surface of the workpiece so that each grain cuts away a small bit of material in the form of chips. Abrasive grinding wheel is an expendable wheel that carries an abrasive compound on its periphery. They are made of small, sharp and very hard natural or synthetic abrasive minerals, bonded together in a matrix to form a wheel. The paper presents a review of some of the characteristics as well as theoretical considerations of operations of abrasive grinding wheel. The relationships among the various grinding parameters; the radial force f, the force on individual grit of grinding wheel F, velocity of grinding wheelg Vg, velocity of work piecew Vw, the wheel diameterg Dg, and the diameter of the work piece Dw were established for given grinding operations.
Structural Analysis of Historic Masonries
Authors: Papalou Angeliki , Stavroulaki Maria E.
Published: October 2013

Several historic masonries have experienced severe damage and collapse due to lack of proper design and maintenance. Understanding of their behavior is essential for their survival. Multi-leaf walls, a special case that is often encountered in historic masonries, need special attention due to the complex geometry and its weak inner leaf. The behavior of historic masonries when subjected to different static load is investigated. An isolated multi-leaf wall is modeled using the finite element method. Multiple cases, varying the properties of the materials of the multi-leaf wall and loading conditions, are analyzed considering linear elastic behavior of the materials. It is found that the properties of the multi-leaf walls and the loads applied affect considerably the response of the structure.
An novel architecture for information hiding using HMAC-MD5
Authors: Loganathan Agilandeeswari , Krishnamoorthy Brindha , Sunny Stiffy , Kumaravel Muralibabu
Published: October 2013

Communication in digital form has become the part of day todays lifestyle, in certain moment communication is made secret to avoid others from knowing the information. By providing security to the sensitive data it is ensured that the users data is protected from viewing and accessing by others. In the current discussion about data security, Steganographic algorithm using two mediums has been discussed that involves image based encryption and converting to word file. The stage involving image based encryption uses HMAC-MD5 algorithm along with LSB steganography. LSB technique scatters the secret data which have to be protected over the entire image. Convert the embedded image in word file, so that the secret message is made unavailable to others who try to obtain the file. This method provides greater payload capacity along with higher image fidelity and thus make the proposed system is more robust against attacks.
Applications of Support Vector Machines in the Exploratory Phase of Petroleum and Natural Gas: a Survey
Authors: Ccoicca Yuri Javier
Published: October 2013

This paper presents an overview of support vector machines (SVM) as one of the most promising intelligent techniques for data analysis found in the published literature, as theoretical approaches and sophisticated applications developed for various research areas and problem domains. This work is an attempt to provide a survey of the applications of SVM for oil and gas exploration to professionals, researchers and academics involved with the hydrocarbons industry. The applications of SVM have been grouped and summarized in the different areas of the exploration phase, which can be used as a guide to assess the effectiveness of SVM over other data mining algorithms. It also provides a better understanding of the various applications that have been developed for an area that offers a glimpse of innovative applications in other domains of the industry.
Haar wavelets approach of traveling wave equation- A plausible solution of lightning stroke model
Authors: Gopalakrishnan Hariharan , Raman R. Rajaraman , Kirthivasan K. Kannan
Published: October 2013

This paper describes a traveling wave model for describing the lightning stroke by the Haar wavelet method (HWM) is proposed. Numerical example is included and illustrated for applicability and validity of the proposed method. The fundamental idea of Haar wavelet method is to convert the differential equations into a group of algebraic equations that involves a finite number of variables. The power of the manageable method is confirmed. The results show that the proposed way is quite reasonable when compared to exact solution. Moreover the use of Haar wavelets is found to be accurate, simple, fast, flexible, convenient, small computation costs and computationally attractive.
Comparative analysis of the fluid dynamic efficiency of standard and alternative intake strategies for multivalve spark-ignition engines
Authors: Algieri Angelo
Published: October 2013

The work aims at investigating the fluid dynamic performances of a multivalve spark-ignition engine and at evaluating the influence of the throttling process on the engine permeability. To this purpose, a production four-stroke internal combustion engine is analysed during the intake phase. The experimental characterisation is carried out at the steady flow rig in terms of dimensionless discharge and flow coefficients. The global investigation illustrates the noticeable effect of the valve lift on the engine head breathability. Furthermore, the experimental analysis demonstrates that the throttling process has a significant influence on the volumetric efficiency of the intake system and this effect increases with the valve lift. Finally, alternative strategies are studied in order to improve the engine fluid dynamic efficiency at partial loads. Specifically, the research shows that inlet valve deactivation and the adoption of asymmetric intake valve lifts assure an increase in head permeability.
Dynamic analysis of composite columns in Inelastic state
Authors: Rezaie Hajidehi Mohsen , Darvizeh Abolfazl , Mohammad Ranjbar Malek
Published: October 2013

The main objective of this study is analyzing Seismic behavior of composite columns in frame in inelastic state under dynamic load. Therefore, three type of composite column have been used in this paper. IPB Steel section embedded in concrete (type 1), Concrete-filled thin-walled steel sections (type 2), half concreted IPB sections (type 3) which are designed for 3 and 8 floor frame tenement in plastic way. Three earthquake accelerogram have been used for analyzing model seismic behavior and model analysis has been done in non-linear dynamic analysis with Seismostruct application. The results demonstrated that frame designed by composite columns type 1 and 3 in the flexural behavior, have similar construction behavior in the way that plasticity, softness and good function to dispose lateral forces are the same. Although Type 2 composite model have large sections, have poor performance in tolerating flexural moment. This event refers to poor role of concrete in tension. On the other hand, the amount of concrete is important in Withstand compressive forces and in constructions with high compressive forces, type 1 and 2 have better performance.
Classifications, Surface Characterization and Standardization of Nanobiomaterials
Authors: Ali Salah H. R. , Almaatoq Marwah M. , Mohamed Abdalla S.A.
Published: October 2013

Biomaterials measurement and standardization are necessary for suitable use in medical industries. Nanobiomaterials used in living creature body, taking in account of their biocompatibility, nontoxic and non carcinogenic. These requirements are eliminate many engineering materials that are available. Thus, the nanobiomaterial should possess adequate physical and mechanical properties and surface characteristics to serve as augmentation or replacement of body tissues. This paper discusses classification of different biomaterials and their standards reference in micro- and nano-scale are used in medical engineering applications in details.
Velocity of detonation (VOD) measurement techniques - practical approach
Authors: Tete Aruna Dhanraj , Deshmukh A.Y. , Yerpude R.R.
Published: October 2013

Velocity of Detonation (VOD) is an important measure characteristics parameter of explosive material. The performance of explosive invariably depends on the velocity of detonation. The power/ strength of explosive to cause fragmentation of the solid structure determine the efficiency of the Blast performed. It is an established fact that measuring velocity of detonation gives a good indication of the strength and hence the performance of the explosive. In this survey various VOD measurement techniques such as electric, nonelectric and fibre optic have been discussed. To aid the discussion some commercially available VOD meter comparison are also presented. After review of the existing units available commercially and study of their respective merits and demerits, feature of an ideal system is proposed.
A review on Artificial Bee Colony algorithm
Authors: Verma Balwant Kumar , Kumar Dharmender
Published: October 2013

In recent years large number of algorithms based on the swarm intelligence has been proposed by various researchers. The Artificial Bee Colony (ABC) algorithm is one of most popular stochastic, swarm based algorithm proposed by Karaboga in 2005 inspired from the foraging behavior of honey bees. In short span of time, ABC algorithm has gain wide popularity among researchers due to its simplicity, easy to implementation and fewer control parameters. Large numbers of problems have been solved using ABC algorithm such as travelling salesman problem, clustering, routing, scheduling etc. the aim of this paper is to provide up to date enlightenment in the field of ABC algorithm and its applications.
Dynamic Threshold-based Congestion Control in Wireless Multimedia Networks
Authors: Abigaba Mirembe Cuthbert , Nyongarwizi Akol Roselyn , Butime Julius
Published: October 2013

The last few decades have seen a tremendous growth of wireless networks demands due to the need to meet different multimedia applications available over the network. The demand has resulted into greater competition for the scarce available network resources and has introduced congestion in such networks that adversely affect the quality of service requirements of the applications. Call admission control is a key element if provision of quality of service in wireless networks is to be guaranteed. In this paper, a call admission control policy for wireless communication networks based on the use of dynamic threshold-based channel allocation scheme is proposed. The scheme deals with two traffic classes; voice and data with two different but equal channel thresholds, one for each traffic type assumed. The effect of the control parameters on the quality of service parameters is illustrated and analyzed.
Analysis and design of different controllers for non-linear power systems
Authors: Chaudhary Rekha , Singh Arun Kumar
Published: October 2013

The objective of this paper is to design controller for non-linear power system using Direct Feedback Linearization technique to improve the transient stability and to achieve better voltage regulation. In case of fault in the power system, power angle and the terminal voltage are the parameters which are to be monitored. The simulation has been carried out taking different values of initial power angles and results were obtained for power angle and terminal voltage. To overcome the demerits of DFL-LQ optimal controller and DFL voltage regulator, co-ordinated controller is proposed. Simulation results show that transient stability of a power system under a large sudden fault has been improved by using co-ordinated controller.
A stepwise multi-assignment spreadsheet model to select student teams
Authors: Celik Bilge Gokhan , Brunnhoeffer Gilbert C. F.
Published: October 2013

Student projects play a big role in engineering and management education. Most projects require students to work in teams, which allow students to practice their technical knowledge, foster the development of personal leadership skills, and teach the value of team accomplishments. One of the challenges of administering team projects is to create the best team compositions that give all teams the equal chance of success while maximizing interaction between students. The instructor should strive to balance each team so the team capabilities are as even as possible. Instructors also should take into account the performance of each student throughout the semester, when recreating teams for upcoming assignments. This paper presents a stepwise optimization that continues throughout the semester as the teams evolve from one assignment to another. Results show that this method can expose students to approximately 50% of their classmates within four team assignments and reasonable team grade variance.
Development of MATLAB-Based Digital Signal Processing Teaching Module with Graphical User Interface Environment for Nigerian University
Authors: Ade' Oyetunji Samson , Ale Daniel
Published: October 2013

The development of a teaching aid module for digital Signal processing (DSP) in Nigeria Universities was undertaken to address the problem associated with non-availability instructional module. This paper annexes the potential of Peripheral Interface Controllers (PICs) with MATLAB resources to develop a PIC-based system with graphic user interface environment suitable for data acquisition and signal processing. The module accepts data from three different sources: real time acquisition, pre-recorded data acquisition and software-generated data. The developed system is able to perform analysis on both stationary and non-stationary signals using Fast Fourier Transform (FFT) and Short Time Fourier Transform (STFT). The STFT-based approach provides Improved Joint Time Frequency Analysis (IJTFA) of signals. A graphical user interface (GUI) was developed to create interactive environment for understanding the operations of digital signal processing. The developed system not only provides interactive platform for data acquisition, spectral analysis and filter design but also makes it avoidable to students in Nigeria University.
Definition of manufacturability - product of mathematical expressions and fuzzy logic for his early design
Authors: Antic Radivoje Borivoje , Cvetkovic Slavica , Pejovic Branko , Cvetkovic Milan
Published: October 2013

The paper explaines manufacturability of products for robust design of a new product. Explained mathematical expressions of fuzzy logics describe manufacturability. Provides an example of using the model for the determination of the tmanufacturability.
Excavation method in Goushfill mine
Authors: Cheraghi Seifabad Masoud , Beheshti Saeed
Published: October 2013

This research tries to investigate the geomechanical parameters of rock mass in Goushfill mine. Using available cores, and studying existing methods, logs, and careful assessment of samples, four types of rock mass in Goushfill mine, shale, mineralized shale, dolomite and mineralized dolomite are classified, on the basis of GSI, RMR and Q-system. The physical parameters, friction angle and cohesion of rock mass are measured in the rock mechanics lab of Isfahan University of Technology. The excavation method is defined according to the results of the study and thus parameters of the excavation are specified.
Localization in Multiple Nearly-Identical Tuned Vibration Absorbers
Authors: Alsuwaiyan Abdullah Saleh
Published: October 2013

The forced vibration of multiple nearly identical translational vibration absorbers is considered. Localization, where the amplitudes of vibration of a group of the absorbers can become relatively large as compared to those of the corresponding perfectly tuned system is investigated. In this work, imperfections amoung the absorbers are allowed and brought into the analysis through the stiffnesses of the absorbers' springs. Steady-state analysis of the mathematical model is used to obtain the results. Results, which focus on translational absorber systems, are found to be consistent with previous results obtained for torsional vibration absorbers. It is found that strengths of the localized responses depend on the levels of imperfections, the relative imperfections among absorbers, and the absorbers' damping. Localization is shown to exist in the undamped multiple nearly-identical vibration absorbers system, or more generally, in the system where the ratio of the level of absorbers' damping to the level of imperfections in the absorbers is small. It is also shown that localized responses can be effectively avoided by introducing some intentional mistuning in the absorbers' stiffnesses. This mistuning should be small in absolute magnitude in order not to reduce the absorbers' performance and should be large when compared to the absorbers' imperfections.
Designing a Microstrip coupled line bandpass filter
Authors: Ragani Taoufik , Touhami N. Amar , Agoutane M.
Published: October 2013

Bandpass filters play a significant role in wireless communication systems. Transmitted and received signals have to be filtered at a certain center frequency with a specific bandwidth, in this paper, a coupled-line bandpass Filter at the center frequency 6 GHz with the wide bandwidth of 2 GHz. this type of filter can be used in WLAN and other applications for the frequency range of 5-7 GHz.
Surgical Management of Neurotuberculosis: Review of Radiological Spectrum
Authors: Gautam V K S , Singh Ravinder
Published: October 2013

Paper reviews the radiological findings of 31 patients of central nervous system tuberculosis (CNS TB) undergone the neurosurgical intervention. As the diagnosis of CNS TB poses a difficulty due to non specific clinical presentation, inability to retrieve microorganism or histopathological tissues, radiological investigations are useful in assessment, diagnosis and treatment of CNS TB. This review may serve as guide to clinicians for a practical approach in investigating cases of neurotuberculosis.
It Gets Better: A Content Analysis of Health Behavior Theory in Anti-Bullying YouTube Videos
Authors: Lister Cameron E , Brutsch Elizabeth , Johnson Amanda , Boyer Caitlin , Hall P. Cougar , West Joshua H
Published: October 2013

Bullying is a pervasive problem that affects children and adolescents of all backgrounds. Public Service Announcements (PSAs) spread through social media present a unique opportunity to reach many young people and teach skills for dealing with bullying. The purpose of this paper is to examine health behavior theory content of anti-bullying YouTube PSAs, and other YouTube videos containing anti-bullying messages. This study design comprised a content analysis for health behavior theory of anti-bullying YouTube videos. Videos were selected from www.YouTube.com using specific search terms typed into the search tool bar. Three graduate students trained in health behavior theory coded the videos. Results demonstrate that most anti-bullying YouTube videos do not incorporate health behavior theoretical constructs. Videos containing links to other websites were found to have greater inclusion of health behavior theory constructs. Theory was also positively associated with the number of views (p < .05). This paper represents the first in-depth content analysis for health behavior theoretical constructs in YouTube videos targeting bullying PSAs. Organizations should incorporate health behavior theories when developing PSAs to maximize behavioral impact, and to achieve high viewership. Overall anti-bullying videos on YouTube are ineffective in both utilizing theory and garnering views.
A longitudinal study of the lifestyle characteristics of adolescent with chronic fatigue symptoms
Authors: Yamada Takayoshi , Demura Shinichi , Shimada Shigeru
Published: October 2013

Fatigue is a complicated, multifactorial disorder that is poorly understood. Till date, many studies conducted have cross-sectionally analyzed the problem, but this fails to recognize the temporal nature of chronic fatigue that lasts over six months. This study aimed to examine the lifestyle characteristics of adolescents with chronic fatigue symptoms. In total, 462 healthy male students aged 1519 years were enrolled to participate in a physical fitness test and surveys on subjective fatigue symptoms and lifestyle. They were assessed twice with a 1-year interval. Significant associations existed between both years in all parameters: for the low fatigue group (V = 0.450.66), except for regularity of bedtime and seasoning and for the high fatigue group (V = 0.450.73), except for regularity of the time of awakening, bedtime, and nutritional balance. Marked differences existed between the groups in the regularity of the time of awakening, nutritional balance, and seasoning (difference of V ? 0.2). All parameters tended to show inadequate lifestyle after a year in the high subjective fatigue symptom group. When compared with adolescents with low levels of fatigue, the lifestyles of adolescents with chronic fatigue changed more markedly and toward a more unhealthy or inadequate lifestyle.
Disabling Hip Osteoarthritis and Cardiovascular Pathology: Presence and Impact
Authors: Marks Ray
Published: October 2013

Objective: This study examined: 1) the extent to which cases with disabling end-stage hip osteoarthritis would exhibit co-occurring cardiovascular health conditions; 2) the pre and post-surgical impact of the presence of one or more of these health conditions on walking ability. Methods: First, a frequency analysis of the various cardiovascular health conditions listed among 1000 end-stage hip osteoarthritis cases was conducted. Second, a sub-sample of 823 uncomplicated surgical cases was specifically examined. Third, a matched sub-sample of 60 cases with and without co-occurring cardiovascular conditions were compared as regards pain, and their ability to functional physically before and after surgery. Results: Almost 50% of cases initially examined had one or more cardiovascular conditions. Among the 10 categories listed, the most common was high blood pressure, found in 28% cases. Significant (p < .05) associations between having one or more cardiovascular comorbidities and high body mass indices were observed, and co-occurring cardiovascular disease independently predicted walking capacity before and after surgery. Key conclusions: Patients with disabling hip osteoarthritis may exhibit high rates of comorbid cardiovascular health conditions. Those presenting with one or more of cardiovascular condition, may have poorer mobility, both before and after surgery than those with no cardiovascular conditions.
Needs assessment of the serious injuries following the September 1999 earthquake in Taiwan
Authors: Liao Yen-Hsiung
Published: October 2013

Purpose To investigate the basic and medical needs of 258 serious injuries in the Chi-Chi earthquake. Approach Subjects were collected from the Department of public Health Bureau, Nantou County Government. The participants were asked to complete the questionnaire about the basic and medical needs 5 months after the earthquake struck. Results There were 13 died, 8 still in hospital, and 250 discharged of the 271 serious injuries. Among the 250 discharged persons, 28 (11.2 %) needed home rehabilitation, 206 (82.4 %) needed hospital rehabilitation routinely, and 16 (6.4 %) cases were cured. The unemployment got the living fee less self-reliant than the employment (odds ratio = 214.67, 95 % confidence interval = 53.22 865.83). The unemployment needed the employment service more than the employment (odds ratio = 5.37, 95 % confidence interval = 1.20 23.94) also. There were no difference between the unemployment and employment for the needs of home rehabilitation, mental counseling, financial support, vocational training, and accommodation service. These analyses suggested that provides both the extent rehabilitation service and job service for the still unemployed as the major strategies for serious injuries in Taiwan.
Cystic Degeneration of Uterine Fibroid Mimicking a Malignant Uterine Neoplasm on MRI
Authors: Nittala Pramod Philip , Shukla Roshni
Published: October 2013

Uterine leiomyomas or fibroids are the most common neoplasm of the uterus. These are commonly encountered in middle aged women in the reproductive age group. Depending upon the location within the uterus and their size, fibroids can be symptomatic or asymptomatic. The common symptoms are of abnormal vaginal bleeding and pain. Fibroids can undergo secondary changes like hyaline, cystic or red degeneration, calcification and sarcomatous transformation and imaging features in these conditions can mimic different pelvic pathologies.
Impact on adult children caring for elderly parents with a long-standing mental illness
Authors: George Kuruvilla , Fuller Linda , Ancell Jennifer
Published: October 2013

Introduction: This research contrasts the experiences of long-term carers of elderly parents who have had a long-standing mental illness and first-time carers of parents who have become mentally unwell in old age. It was hypothesized that the children of elderly parents with a long-standing mental illness have differing needs when faced with the caring role compared to first-time carers of elderly mentally ill patients. Method: Using a qualitative research methodology and interpretive perspective, eight carers were interviewed using a standardized questionnaire from which salient issues were drawn and analyzed. Results: Long-term carers faced issues including a longer duration of care-giver stress, early entry into adult responsibilities of caring, frustrations concerning lack of recognition from mental health services and cumulative stress affecting long-term carers significant relationships and health. First-time carers sought earlier access to mental health services, specialist information about mental health issues and coping strategies for the care-giving role. Conclusion: It was found that both sets of carers (long-term and first-time), irrespective of the duration of their caring experiences, shared complex and competing demands on their physical and emotional resources. All carers were able to identify ways to improve support to improve support to children caring for ageing mentally ill parents.
Adrenal gland dysfunction and myocardial Tissue Doppler echocardiographic abnormalities in Patients with Beta Thalassemia Major: cross sectional study
Authors: Garadah Taysir Said , Jaradat Ahmed , Mahdi Najat , Hassan Zuhair , Das Nagla
Published: October 2013

Background: Adrenal, parathyroid gland and myocardial echocardiographic abnormalities are recognized with variable outcomes in patients with transfusion dependent Beta-Thalassemia major (-TM). Aim: In this cross-sectional analytic study in patients with -TM, we evaluate the left ventricle systolic and diastolic function using Pulsed Doppler (PD) and Tissue Doppler (DT) echocardiogram with simultaneous measurement of serum level of cortisol and parathyroid hormone. Methods: The study was conducted on patients with ?-TM (n = 99, age 15.928.92 years) and compared with an age-matched controls (n = 98 age 15.798.94 years). In all participants echocardiographic indices of M mode and PD and TD were performed. Blood samples were withdrawn for measuring the serum cortisol, parathyroid and Ferritin. Correlation between the level of cortisol and ferritin level was evaluated. Results: Patients with ?-TM compared with controls, have significantly thicker LV septal wall index of 0.65 0.26 vs. 0.44 0.2190, P<0.001 and LV posterior wall of 0.65 0.235 vs. 0.43 0.214, P< 0.001, with no significant dilation of LV cavity in systole and diastole. The systolic function of LVFE% was normal of 51.95?5.5 vs. 5.0?5.6, p=0.23. Furthermore patients with ?-TM have higher E/A ratio (1.540.18 vs. 1.230.17, P<0.01) and shorter deceleration time (DT) (170.5313.3 vs. 210.5019.20 m sec, P<0.01). The ratio of transmitral E wave velocity to the tissue Doppler E wave at the basal septal mitral annulus (E/Em) was significantly higher in ?-TM group (19.682.81 vs. 13.861.41, P<0.05). The tissue Doppler systolic wave (Sm) velocity and the early diastolic wave (Em) were significantly lower in ?-TM group compared with controls with Sm, of 4.821.2 vs. 6.222.1 cm/sec, P<0.05 and (Em) of 3.512.7 vs. 4.122.5 cm/sec P<0.05, respectively). The tricuspid valve velocity was significantly higher in ?-TM patients compared with controls (2.850.56 vs. 1.7430.47 m/sec, respectively, P<0.01). The prevalence of adrenal insufficiency in patients with -TM was 16 %, hypoparathyroidism of 4.5%. There was a weak negative correlation between serum level of cortisol and the serum Ferritin. Conclusion: Patients with ?-thalassemia major had a high prevalence of subclinical adrenal insufficiency of 16%, hypoparathyroidism of 4.5% with weak negative correlation between the low level of cortisol ?160 nmol/L and high serum ferritin. Echocardiographic Pulsed Doppler showed a restrictive LV diastolic pattern suggestive of advanced diastolic dysfunction but preserved left ventricle systolic function.
A therapeutic group program in an aged person�s mental health unit
Authors: George Kuruvilla , Ferris Angela
Published: October 2013

Objective: The aim of this paper is to describe a therapeutic group program in an acute aged persons mental health inpatient unit. The setting of the unit, the development of the program and patient feedback are discussed. Conclusion: The key factor in the success of the group program was the support of the multidisciplinary staff facilitators of the program. An ongoing and significant challenge is the provision of groups appropriate for the varying levels of function within the patient group and especially meeting the needs of patients with behavioural and psychological symptoms of dementia