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Volume 2 Issue 9 (September 2015)

S.No. Title & Authors Page No View
1

Title : Numerical Study on Temperature Distribution of Water-in-Glass Evacuated Tubes Solar Water Heater

Authors : Zaw Min Thant, Myat Myat Soe, Maw Maw Htay

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This A numerical study on water-in-glass evacuated tube solar collector using Computational Fluid Dynamics (CFD) is presented in this work. The water-in-glass evacuated tube is an integral part of evacuated tube solar water heater. The water-in-glass collector is the mostly used form of evacuated tube collector because it has higher thermal efficiency and simple construction requirements and hence low manufacturing cost. The usage of evacuated tube collectors is increasing day by day. Thus, several works have been published for representing the stratification of the fluid inside the tubes and the reservoir, as well as analytical modelling for the heat flow problem. Based on recent publications, this paper proposes the study of solar water heating with evacuated tubes, their operation characteristics and operating parameters. To develop this work, a computational tool will be used-in this case, the application of computational fluid dynamics (CFD) software. The commercial software ANSYS-CFX® was used for the CFD simulation of the temperature distribution of water-in-glass evacuated tube solar water heater, which uses the Finite Volume Method (FVM).  The objective of this work is to complement the studies cited earlier, approaching the transient analysis of an evacuated tube collector with different inclinations  geometries and different tube dimensions geometries , to allow better heat removal from the tube and to evaluate the behaviour of the fluid within this solar collector and possible improvements to be applied in the model. In this work,  the model with three different inclinations (30°, 45°, 60°)and same tube dimension (47D1800L) is described and then the model with different dimension(47D1200L, 34D1400L) for same inclination is also simulated. According to the simulation results, length and diameter (47D1800L) and inclination angle 45° model is the best.

1-7
2

Title : Management of the Local Water Supply in the Municipality Of Ouesse in Benin

Authors :

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The availability of drinking water for the vital needs of the current and future generations is one of the biggest challenges the humanity is faced with. This study listed the problems connected to the management of the hydraulic infrastructures in the municipality of Ouèssè in the context of decentralization meant to contribute to its local development. The methodology used is based on desk study, direct observations, ground study, and processing and analysis of data. The qualitative and statistical data were collected by means of tools (questionnaires and interview guide) as well as collection techniques within different target groups (Agent, Farmer, intellectuals, resource person etc.). The study concerned three (03) villages and the research enrolled two hundred and sixty one (261) investigated persons. The professionalization of the hydraulic infrastructures in the context of decentralization ended with the community-based management in the municipality of Ouessè. That approach which is well appreciated in drinking water supply also meets chalenges. So the Weaknesses and Threats are identified as the social unrest observed at the level of some opinion leaders and the worrying silence of municipal authorities facing with the indelicacy of certain managers or opinion leaders. These aspects were the object of suggestion for the improvement of the management of Millennium development goals.

8-14
3

Title : Complex of Lascoux in Partition (6,6,3)

Authors : Haytham Razooki Hassan, Mays Majid Mohammed

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In this paper, the complex of Lascoux in the case of partition (6,6,3) has been studied by using diagrams, divided power of the place polarization  ,Capelli identities and the idea of mapping cone.

15-17
4

Title : Efficient Mining for Hadoop process with big data

Authors : Savita Suryavanshi

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Abstract :

Big data concern large-volume, complex, growing data sets that are too big. It is difficult to Big Data Mining with our current methodologies or data mining software tools, they are emerging in many important applications, such as Internet search, business informatics, and social networks, social media, genomics, and meteorology, Big Data mining grand challenge to identify the datasets and capability of extracting useful information from large datasets or streams of data The unification of multiple datasets from disparate sources in combination with advanced analytics techniques and technologies will advance problem solving capabilities, and in turn will improve the ability of predictive analysts to reveal insights that can effectively support decision making. The analysis of big data sources can be used to identify cost saving and opportunities to increase efficiency, which will directly contribute to an improvement in productivity. This can in turn help to encourage further innovations and prediction.

18-20
5

Title : On The Exact Quotient Of Division By Zero

Authors : Okoh Ufuoma

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This paper aims to present the solution to the most significant problem in all of analysis, namely, the problem of assigning a precise quotient for the division by zero, . It is universally acknowledged that if  and  are two integers where , the fraction , when evaluated, gives rise to only one rational quotient. But, here in analysis, at least three quotients have been assigned to the fraction  by various departments of analysis. Moreover, so much hot debate has emerged from the discussion which has arisen from this subject. It is, therefore, the purpose of this paper to furnish the exact quotient for the special and most significant case of division by zero, the fraction

21-28
6

Title : Assessment of Ambient Air Quality at Gajuwaka Industrial Hub in Visakhapatnam using IND-AQI method

Authors : S. Srinivasa Rao, N. Srinivasa Rajamani, E.U.B. Reddi

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Air pollution is projected as one of the major environmental issues as it risks the health of humans by spoiling air quality.  Hence, air quality indices have been considered by many researchers as a simple and understandable way to measure the air quality with respect to its effects on human health.  In this context, we collected a total of 168 ambient air samples in winter and summer seasons at seven points in selected residential areas of the Gajuwaka industrial hub. The measured data of six criteria air pollutants such as RSPM, TSPM, SO2, NOx, NH3 and Pb were converted into an Indian air quality index (IND-AQI) recently developed by CPCB, New Delhi to study the status and seasonal variation of the air quality.  The results revealed that the seasonal mean of air quality index values was varied from 60.2 to 143.3 and 82.8 to 226.5 in winter and summer seasons respectively. Gaseous pollutants and RSPM values were found to be higher in winter compared to summer season whereas TSPM values are high in summer with respect to winter season. It has been observed that on the basis of IND-AQI scale, the study area has fallen under ‘moderate’ category with the annual mean value of 118.4 The study indicated that total suspended particulate matter (TSPM) was mainly responsible for air pollution (92.9%) in this area during the study period and became a critical pollutant in the majority of the sampling points followed by RSPM.  Further, the calculated Exceedence factors were also confirmed the deterioration of air quality in the study area as moderate to high pollution category with TSPM as a critical pollutant. Increasing trends of air pollution were observed consistently during the study period at all the locations.

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7

Title : How does the intervertebral discs parameter variation affect the biomechanical behavior of spinal structures? Results of a detailed study of multibody simulation sensitivity

Authors : Sabine Bauer, Dietrich Paulus

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At the present there is a variety of ways to investigate the biomechanical properties of human structures. In addition to experimenting and imaging, computer modeling is an established method to calculate the kinematics and kinetics. While many different lumbar spine models have already been created, the sensitivity of the model to input parameters has still not been sufficiently studied. To come up with a realistic modeling, the effects and the interaction of various input parameters must be understood in advance. Particularly for the development of patient-specific models knowledge about the influence of the input parameter constitutes the basis of solid modeling. In the respective literature, especially the performance of the intervertebral disc is described as central to any spine model and thus requires a detailed investigation at first. A multibody simulation model of the lumbar spine that takes the biomechanical properties of the spinal structures such as the intervertebral discs, the ligaments, and the facet joints into account has been created. The model has been validated by comparing the results with results from appropriate literature. The aim of this study is to investigate the impact of the modified disc stiffness onto the spinal structures. For this purpose, stiffness values ​​are used as input parameters that have been published in the literature. To investigate the relationship between the different interspinous structures when changing input parameters the most natural load case, the upright state, is simulated. The disc characteristic of the highest and lowest functional spinal unit shows that the load situation under different stiffness is almost identical. Slight changes are recorded in the central functional spinal units, which are also reflected in the intersegmental rotations. The biggest impact is recorded in the facet joints. The load structure of facets changes in all five functional spinal units. Some are nearly twice as heavily loaded. The study proves that the use of different input parameters does not necessarily lead to major change in the biomechanical behavior of the structures in which the input parameter has been changed, but may have a greater impact on other modeled structures.

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8

Title : Energy Harvesting Enhancement of a Piezoelectric Converter

Authors : Y. Kebbati, H. Souffi, M. Pyee

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In this paper, we present the optimization of the energy harvesting in the case of piezoelectric converter. In fact, the conversion of mechanical energy from environmental vibrations into electrical energy is a key point for powering sensor nodes, toward the development of autonomous sensor systems. Piezoelectric energy converters realized in a cantilever configuration are the most studied for this purpose. In order to improve the performances of the converter, the polarization was specially studied with FEM simulations. A parametrized model was created. The electrical energy generated by the converter under an applied force was computed. The experimental results was shown for ceramic PZT. 

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9

Title : Multi-criteria evaluation used as a tool taking into account the optimal selection of materials, described on example of selection of thermal insulation materials for wood-based envelope

Authors : Martin Labovsky, Martin Lopusniak, Veronika Bartosova

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Currently, the choice of materials for the construction of buildings should take into account not only their traditional features such as price and quality but also the environmental qualities. The thesis describes the process of multi-criteria evaluation of thermal insulation materials for wood-based envelope with other possible comparing of obtained valuation parameters. 

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10

Title : Effect of heat treatment on glass-ceramics covering of SiO2-Al2O3-CaO system using industrial waste as raw material

Authors :

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On a day to day basis, the demand for goods and services cause environmental damage due to the overuse of natural resources and the increase in residues related to these activities.  The biological treatment of wastewater has become an important source of solid residues.  At the same time, industrial development and technological advances have generated processes that produce a great variety of residues as byproducts.  Some of these residues, because of their inorganic composition and innocuousness, can be incorporated into the production of ceramic materials to substitute traditional or natural raw materials.  The biosolid ashes resulting from the biological treatment of wastewater are rich in CaO, SiO2, Fe2O3 and P2O5, while the residues from the anodization process mainly contain Al2(SO4)3 and Al(OH)3  salts; under this premise, a ceramic system is designed, SiO2-Al2O3-CaO, where biosolid ashes are incorporated as supplementary sources of SiO2  and the aluminum salts as substitute for Al2O3.  The type of thermal treatment applied was a continuous and intermittent system.  Upon examination of the results in the mineral composition and the morphology of the materials obtained through DRX (X-ray Diffraction) and SEM (Scanning Electron Microscopy), it can be observed that the material submitted to both types of thermal treatments show phases of elevated hardness and of highly ordered crystal structures, such as corundum.  Nevertheless the materials that are more homogeneous and have more defined crystals are identified in those samples submitted to a continuous system thermal treatment.

48-50
11

Title : Case study possibilities of reducing energy of residential building

Authors : Ing. Anton Pitonak, Ing. Martin Lopusniak

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Residential buildings nowadays have a high energy consumption. This is due to the fact, that many of them are still not retrofitted. As the European Union in the new directive (known as the 20-20-20) adopted three major commitments to meet the criteria by 2020, it is necessary to pay attention to the retrofit. The aim of the work is to point out how contribute to reducing energy consumption and why pay more attention to the comprehensive retrofit over the partial retrofit.

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12

Title : Thermoluminescence Dosimetry study of Feldspar Mineral Used as Base Material of Ceramic Tiles

Authors : H.C.Mandavia

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This paper deals with the Thermoluminescence (TL) dosimetry work. This paper represents the growth studies of natural Feldspar mineral used as raw material in ceramic tiles. The comparative TL study and discussion  of glow curve of as received Feldspar mineraltreated with  different  beta radiation dose as 2.5Gy, 5Gy, 10Gy, 25Gy, 50Gy, 75Gy, 150Gy, 300Gy, 600Gy,The tables indicating peak temperature and peak intensity will also furnished. The results are carrying the material   towards the excellent dosimetric   behavior.

55-59
13

Title : The Performance of Ultrafine Palm Oil Fuel Ash in Suppressing the Alkali Silica Reaction in Mortar Bar

Authors : Hidayati Asrah, Abdul K. Mirasa, Md. A. Mannan

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This study evaluates the effect of ultrafine palm oil fuel ash (POFA) on the alkali silica reaction (ASR) of mortar. To study the effectiveness of ultrafine POFA in suppressing the ASR, four different sizes of POFA were used in this study: the unground (UG), medium (MP), fine (FP), and ultrafine size (UF). Characterization of POFA was done to investigate their particle size, fineness, specific gravity, chemical composition, loss on ignition (LOI), and morphology. Initially, the pessimum effect of the sandstone aggregate was determined by blending 5, 15, 50, 75, and 100% of sandstone aggregates with the granite. POFA was then introduced as cement replacement at 0 - 40% by weight of binder. To investigate the effect of ultrafine POFA on ASR, ASTM C1260 and ASTM C1567 were adopted. The strength activity index was also determined to study the pozzolanic effect of the ultrafine POFA. Results show that the ultrafine POFA significantly increase the pozzolanic reactivity of mortar. At 14-days of testing, ultrafine POFA shows higher resistance against the alkali silica reaction (ASR) attack compared to coarser POFA. Higher level of replacement is required for coarser POFA to resist ASR attack in the mortar bar. 

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14

Title : Characterization of an Atmospheric-pressure Cold Plasma Jet

Authors : G. M. Elaragi, H. S. Elaraby

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Cold atmospheric pressure plasma jets are playing important role in various plasma applications. Each jet is characterized by providing its operational parameters such as power, type of gas, plasma temperature and density, electrode system and geometrical jet (radius, length). The velocity of the plasma jet has been observed by time of flight (TOF) using optical fiber cable and Photomultiplier tube, the measured average plasma velocity is about 106 cm/sec.

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15

Title : An Overview and Tutorials on Modeling and Simulation

Authors : Ahmed Hassan M. Hassan, Fathelrhman Omer M. Elameen, Mogtaba Mohamed Osman

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The modeling and simulation are the most important challenges to the researcher to present the system reality and study the different metrics of it. This article provides the short overview to assist the new researchers toward their goals. With aid of differ scenarios related to an engineering domain the designers have an ability to answer critical questions about modeling and simulation.

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16

Title : Electro-generated Chemiluminescent Determination of Methotrexate in Pharmaceutical Preparations by Tris (2,2-bipyridine)ruthenium(II) Using Flow Injection

Authors : Mohammad A. Abdalla, Ibrahim Z. Al-Zamil, Saad A. Al-Tamrah, Telal S. Omar

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A novel electro-generated chemiluminescence method for the determination of methotrexate (2,4-diamino-N10-methyl pteroyl glutamic acid) in pharmaceutical formulations is proposed. The method was based on the chemiluminescence (CL) emission intensity produced as a result of the electrochemical oxidation of the  into the active  form, which then reacts with the methotrexate and produces light. Reaction variables were thoroughly investigated. The optimum conditions were incorporated in the procedure. Linear calibration curve were obtained for signal in mV versus concentration in mol L1 in the range 0-21×107 M with percentage relative standard deviation of less than 2% (n = 6) and correlation coefficient of r = 0.99986. The method described here proved to be very convenient and easy to use for the assay of methotrexate in drug formulations. This method was tested by the determination of methotrexate in different drugs containing known concentration.

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17

Title : Thermal insulation of walls and roofs by PCM: modeling and experimental validation

Authors : Kamal A. R. Ismail, J. N. Castro, Fatima A. M. Lino

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In hot and tropical countries external walls and roofs receive solar radiation absorbing part of it and transmitting a substantial part to the internal ambient provoking thermal discomfort. In cold climate heat is usually lost to the external ambient and again causing thermal discomfort. In both cases the thermal energy load is increased. For these reasons many studies were dedicated to investigate techniques for improving the thermal performance of walls and roofs. One of the most viable techniques is the use of PCM as thermal insulation filler that increases the thermal inertia of the component at relatively low cost and without substantial increase of weight. The formulation of the problem of the PCM composite wall is based on one dimensional pure conduction model for the PCM and the walls. The numerical solution involves moving grid for the PCM. The computational grid was optimized to eliminate grid size effects. The model was extended to treat the roof problem. The numerical predictions were compared with experimental results and reasonably good agreement was found.  Additional numerical and experimental results were presented and discussed.

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18

Title : Difficulties in the Definition of Matter States

Authors : Taha Massalha

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A matter in liquid state is known to attain the shape of the vessel which holds it – water is a glass will assume the shape of the glass. Solids, however, will retain their own shape wherever they are contained. What do these statements rely on and are they always valid?

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Title : Study the performance of the organic membrane ultrafiltration on whey treatment

Authors : Sakina Belhamidi, Majdouline Larif, Hajar Qabli, Soufian Elghzizel, Hicham Jalte, Selma Chouni, Azzedine Elmidaoui

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Treatment of whey using the organic membrane processes namely ultrafiltration (UF) was investigated to recover the proteins for re-use. Membrane module was tested in batch mode operations and multi-stages operations employing the influence of the pH and temperature. The performance of ultrafiltration membrane can be characterized permeate flux and membrane retention, these parameters are determined by pH and temperature. The influence of these parameters on whey protein concentrate is also measured. The permeate flux and the protein content in the permeate and in the concentrate fractions were measured during the experimental runs. By comparing the separation behavior of the membrane for the two separation modes it was found that the investigated membrane produced the best results from the point of permeate flux, VRF and protein content in multi-stage modes in optimal condition (pH=6.5 and Temperature 50°C). The filtration characteristics were obviously influenced by the process parameters.

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