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Volume 5 Issue 1 (January 2018)

S.No. Title & Authors Page No View
1

Title : Determination of Soil-to-Plant Transfer Factors for Ra-226 and Ra-228 in Some Egyptian Crops

Authors : W. M. Abdellah, A. El-Sharkawy

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Abstract :

Soil to plant transfer factors (TFs) of 226Ra and 228Ra have been determined for different crops, such as Cabbage, Cucumber, Kale, Aubergine, Pepper, Zucchini and Tomato. The crops were collected from some local farms in Al-Qalyubia governorate Egypt under outdoor ambient tropical conditions for two growing seasons 2014 & 2015. The crops samples and their corresponding soils were analysed for 226Ra and 228Ra using High Purity Germanium Detector (HPGe). Quality assurance objectives were followed through the efficiency calibration of the HPGe detector, background estimation, assessment of combined uncertainties and the analyses of IAEA certified soil and plant reference materials. The total activity concentrations of 226Ra(238U), 232Th and 40K in soil were ranged from 6±1.2 to 87.5±4.5, 3.8±1.2 to 19.3±2.0 and 91.3±4.1 to 781.8±37 Bq kg-1 respectively. The average activities of 226Ra and 228Ra in the crops under this investigation ranged from 0.1 to 2.8 and 0.2 to 13.9 Bq kg-1 dry weight respectively. Cabbage and Cucumber showed maximum concentration ratios of 0.07 for 226Ra whereas for 228Ra Cabbage and Aubergine had relatively higher values of 0.13. The results obtained are within the range of the corresponding values reported by IAEA in 1994 & 2010. The present work may provide a database of TFs for these agricultural environments to be used in radiological safety assessment models.

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2

Title : Combined Convection Heat Transfer at the Entrance Region of Horizontal Semicircular Duct

Authors : Akeel Abdullah Mohammed, Mustafa AbduI Mageed Mohammed

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Abstract :

Experimental study has been conducted on mixed convection heat transfer at the entrance  region of uniformly heated horizontal semicircular duct with flat plate at the bottom. The effect of  heat flux and Reynolds number on the local and average Nusselt number has been investigated. The Study has been covered a wide range of heat flux (510 ≤q ≤ 1060) W/m2 and Reynolds number varies from 500 to 2000 . The results show that, the local Nusselt number value increases as Reynolds number and heat flux increase. An empirical equation of average Nusselt number as a function of Rayleigh number and Reynolds number has been deduced.

7-12
3

Title : Detecting beats in the ECG: A comparison of time domain and morphological features using Support Vector Machines and MultiLayer Perceptron

Authors : Aunsa Shah, Seral Ozşen, Abbas Shah

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Abstract :

The ElectroCardioGraph (ECG) is the most widely used diagnostic test for determining heart related disease prognosis. This paper presents a comparison of two types of feature extraction methods and two types of classifiers for the detection of four types of heart beats in the ECG. The four types of heart beats considered in this work are Normal, Right Bundle Branch Block Beat, Left Bundle Branch Block Beat and the Premature Ventricular Contraction beat. The first set of features computed for each beat type are statistical in nature in the time domain and the second set of features are morphological in nature.  The values of the features in these two sets are then sent to two different classification algorithms, the Support Vector Machine (SVM) and the MultiLayer Perceptron (MLP) Neural Network. The classification results demonstrate that when comparing the chosen set of statistical and morphological features, the statistical values of each beat provide a higher detection accuracy for all beat types. Furthermore, it was also observed that when comparing the performance of the SVM and MLP algorithms for heart beat classification, the MLP was found to outperform SVM when using statistical features and when both feature sets were combined, however, the opposite was observed when only morphological features were used in which case, the SVM outperformed the MLP network.

13-16
4

Title : Directional q-Derivative

Authors : Zafer Sanli

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Abstract :

In this paper partial q-derivative of a two variable function f and directional q-derivative of function at the point in the direction of a unit vector are introduced and some properties of q- directional derivative are investigated.

17-18
5

Title : Numerical Simulation of High Level Sound Generated in Boiler tube Bank Duct

Authors : Masaaki Mori, Takayuki Masumoto, Kunihiko Ishihara

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Abstract :

Heat exchangers and boilers are widely used in various plants such as power plants and chemical plants. In heat exchangers and boilers, tube banks are set in a duct such that water passes through inside the tubes and warm gas outside the tubes. Due to the external flow around tube banks, the resonance phenomenon called the self-sustained tone occurs at a certain velocity. The self-sustained tone might cause noise problems in the surroundings, cause losses due to plant shutdown, etc. The self-sustained tone has been studied, and the generation mechanism has been experimentally and numerically clarified. In this paper, we have performed numerical simulations of high level sound generated in boiler tube bank duct with the flow and an acoustic simulation without the flow for a practical generation prediction of a self-sustained tone. The results show a good agreement with measurement data, and that acoustic resonance phenomenon has been numerically captured and clarified. There is the slight difference in the resonance frequencies obtained from the acoustic simulation (without the flow) by means of BEM and the CFD simulation or the experiments due to the absence or presence of the flow.

19-24
6

Title : Assessing Design Strategies in Modular Product Development

Authors : Bing-Hsuan Wu, Chung-Chuan Wang, Chung-Shing Wang, Ching-Hu Yang

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Abstract :

In the process of product development, it is essential to grasp customer preference and reduce development cost accurately. How to use product modularization to improve sharing of components in mass production, to meet the demand of consumers by the advantage of product diversity, is an important topic worth discussing. In this study, the modular architecture of product components was established by the domain mapping matrix. First, fuzzy Delphi method was introduced to evaluate the criteria of customer requirements. Secondly, design structure matrix method categorized the customer requirements to the goals of design and parts to the modular groups. Finally, analytic network process based on super matrix were used to find the weights for modular parts and assess the design strategies for a product development. Based on the research, three upright fitness bicycles were designed to realize the concept of product diversity.

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7

Title : Design and Development of Self-Governing Robotic Cart for Universal Applications

Authors : Dr. M. Karthik, K. Sudharshan, D. Subramani, S. Nivethitha

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Abstract :

In this paper, we describe a concept of designing a robot capable of pursuing a specific person with carrying person’s luggage. The proposed system involves robotic cart which is able to track and follow the target in unstructured environments. This reduces the human efforts in domestic and industrial applications. A person following robot is desired in many applications. It uses a control system which can carry luggage as well as follow the target person. The follower robotic cart is proposed by interfacing the microcontroller with an ultrasonic sensor. Ultrasonic sensors are used to identify and follow the target person. The system is designed to provide a contactless transport along with the target person. The distance between the person and the robot is measured and the movement of the robot is decided by the inputs given to microcontroller by ultrasonic sensors mounted on servo motor which helps to drive the robot.

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8

Title : The Effects of Air Pollution on Damages in Historical Buildings, the Case of Gaziantep, Turkey

Authors : Tulay Karadayi Yenice

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Abstract :

Conservation of historical buildings and monuments and handing them down to future generations is one of the main issues of architecture. Contrary to popular belief, preserving these constructions for centuries may be difficult under the changing conditions in the world, in spite of the opportunities of the improving technology. Air pollution is one of the greatest protection issues for these structures to be preserved against. The major causes of air pollution may include the use of fossil fuels in transportation and electricity generation, burning of the solid waste, industrial and local use of fuel, and industrial activities. The aim of this research is to determine the impact of air pollution on the deformations at the historical buildings in Gaziantep's historical city centre. The traditional monumental and civil architectural works made of stone materials constitute the basic material of the research. In the study, the effects of SOx and NOx, and particulate matters, the most important pollutants originating from the weather conditions and causing deformation at the stones, were evaluated and the harms were determined. As a result of this study, it is identified that the most important effect of air pollution on the stone material is the formation of crust. The crusting not only affects the structure of the stone but also it may cause exfoliation and stratification. Abrasion is another effect of air pollution on the stone. However, it has been seen that the importance of this effect is less than the other factors related to air pollution.

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