bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Performance Investigation of Hybrid PV/Thermal System
Authors: K. Idan Al-Chlaihawi Kadhim , A. Hamzah Dhafer , K. Zarzoor Ahmed , M. Hasan Yousif 
Published: July 2019

Promoting reduction of PV temperature plays crucial role in increasing electrical performance. The present work deal with different types of absorber shape for analysing heat transfer phenomena. Serpentine and spiral absorber are using to verify this purpose with different boundary conditions of inlet mass flow rate and inlet temperatures.The recent study was conducted to evaluate the effect of some operating and designing parameters such as solar radiation levels, flow rates, absorber shape and cooling water temperature on the performance of PVT system numerically. Performance of PVT system determined by thermal efficiency, electrical efficiency and the summation of both known as total or PVT efficiency. Solar radiation ranging from 500 W/m2 to1000 W/m2 was introduced and at each, flow rates of water ranging from 0.016 kg/s to 0.05 kg/s. The results show that the performance of PVT increases with a flow rate at all radiation levels. Also the spiral flow absorber gives a higher performance than serpentine absorber where the value of Â of spiral absorber is increased by about 5.2% compared to the value of serpentine absorber, on the other hand, the rate of heat loss (Â decreased by about 10%.Increasing initial cooling water temperature degrades electrical efficiency of PVT system.Â Â
The Effect of Compression Ratio on Pollutant Emission of a Diesel Engine Fuelled with Nano Diesel
Authors: Kathum Nassir Abdulkhodor , A. K. Shahad Haroun 
Published: July 2019

This studying aims to examine the impact of compression ratio (CR) on the pollutants of a compression ignition engine (CIE) fuelled with Nano-diesel. Nano-particles of Al2O3 and TiO2 are used as additives to diesel fuel with particle size less 45 nm. The impact is tested for 25, 50, 100 and 150 ppm doses. Tests are performed at different loads and a speed of 1500 rpm. Three CR are used namely13.5, 15.5 and 17.5. Results illustrated the affects of CR on the emissions of CO, CO2, NOx, smoke opacity and UHC. Results showed Â that CO concentration rises with increasing of CR for Al2O3. It is increased by 2.5, 4.9 and 15.3% for the three ratios at 100ppm and 25% load while at full load there is no much effect as a result of high combustion temperature. Negligible effect is noticed for TiO2.The concentration of CO2rises with increasing CR at all dozes but it is very clear with 150ppm and 25% load3.7, 4.1 and 4.8% for Al2O3. The effect ofÂ TiO2 is higher than that of Al2O3. The results also, show that NOx concentration is increased and becomes 604, 651 and 698ppm for 13.5, 15.5 and 17.5 respectively for Al2O3 at 25ppm and 25% load. The impact of Al2O3 is more noticeable than that of TiO2.The smoke opacity is slightly affected by CR for Al2O3 andÂ TiO2 at all doses and 25% load. UHC decreases slightly from 79, 75 and 71 ppm for CR of 13.5, 15.5 and 17.5 respectively for Al2O3 at 25ppm and 25% load. UHC decreases from 68, 65 and 61 ppm for CR13.5, 15.5 and 17 respectively for TiO2 at 25ppm and 25% load.Â Â
Promote Replica Management based on Data Mining Techniques
Authors: M. Almuttairi Rafah , S. Almhanna Mahdi , Q. Mohammed Mohammed , Q Muhamed Saif 
Published: July 2019

The data grid technique evolved largely in sharing the data in multiple geographical stations across different sites to improve the data access and increases the speed of transmissionÂ data. The performance and the availability of the resources is taken into account, when a total of sites holding a copy of files, there is a considerable benefit in selecting the best set of replica sites to be cooperated for increasing data transfer job. In this paper, new selecrtion strategy is proposed to reduce the total transfer time of required files. Pincer-Search algorithm is used to explore the common characteristics of sites to select uncongestedÂ replica sites.Â Â
Structural Behavior of Continuous Steel-Reactive Powder Concrete Composiate Beams Under Repeated Loads
Authors: Yassien Dakhil Rasha , B. Dawood Mustafa 
Published: July 2019

A study for the continuous composite steel-reactive powder concrete beams under repeated loads were executed experimentally and analytically. In the experimental part, six continuous composite sections were constructed as test beams. "Theâ€˜â€œdecks slab concretes"was connected tos steel I-beams by headed steel studs welded to the top flangesâ€œofsâ€œthesâ€˜â€˜steel I-beams.â€œT,he dimensionsâ€œ of â€œtheâ€œ deck slab is (2200Ã—250Ã—80mm), while the type of I-beam is (IPE 140) with length of (2200mm). For the present work, the experimental work includes also examining the shear in the links by creating two models (push out) and tested to determine the properties and behavior of the studs. The behavior of the studs were conducted by"getting load-slip curves. In the part of the,oretical,â€˜â€˜.tested beams.was numericallysmodeled then analyzed using thesfinite element method.â€˜â€œThesâ€œnumerical models were carried out in three dimensionss bysâ€œthe software package (ANSYS 16.1). Verifi,cationsof thesnumericalsresultsâ€œwas donesbyscompari,ngs thems with the experimentals results. â€œThesresultssof thesfiniteselementsanalysissshowed good agreementsâ€˜with the results ofsthe experimental tests. The maximumsandsminimum differenceâ€˜â€˜in ultimate loa,ds for beamsâ€˜â€˜ were (5.85% and 1.33%) respectively.Â The results show that stiffenerssof beamssandsstrengthening with CFRP shall increase the ultimate load capacityâ€˜and affects onâ€˜â€˜mode of failureâ€œ of theses beams.â€˜Â Â
An Evaluation Instrument (Q-U) for Measuring the usability of Business Intelligence Application
Authors: Hameed Mousa Ayad , Adnan Raheem Heba , Talib Mohammed Nibras 
Published: July 2019

The main purpose of Business Intelligence (BI) applications is to focus on supporting organizations' strategic, operational and tactical decisions by providing comprehensive, accurate and vivid data to the decision makers. Usability testing is an important part of software development. It focuses on how well users can understand and utilize a product/software in fulfilling their intended goals. In the software development, most software tends to be complex. Hence, the way to ensure that such software will satisfy users will be done by measuring the usability of such software. Due to using many data integration techniques in developing BI application, thus, the different software have different instruments to measure the usability of BI software. In this paper, the new instrument (Q-U) for measuring BI software was developed. A systematic approach was adopted which suggested by many researchers in developing the intended Q-U instrument.The literature has been reviewed in a systematic manner to elicitation Q-U instrument attributes. Multi-methods were used in validating Q-U instrument such as face validity, a pilot study for testing the goodness ofÂ Â Q-U consistency, and factor analysis. Multi-methods were used in validating Q-U instrument such as face validity, a pilot study for testing the goodness ofÂ Â Q-U consistency, and factor analysis as well as Bartlettâ€™s test for measuring the reliability of Q_U. The finding obtained indicates the workability of Q_U in measuring the usability OF BI applications. Ultimately, Q_U was used in measuring BI application in two different sectors.Â Â
Fabrication and Characterization of Piezoelectric Polymer Nano Composites for Humidity Sensors Applications
Authors: Jabbar Braihi Auda , Amir Flaieh Ahmed , Mohammed Hussein Mostafa 
Published: July 2019

Piezoelectric polymer nano compositesfor humidity sensors applications are manufactured in this work by adding nano Yttrium oxides (Y2O3) in three ratios (3,6and 9 wt.%) to the polymeric blend consist of (1:9) poly vinyl difluoride (PVDF) and poly methyl methacrylate (PMMA). FTIR results showed that PVDF addition to PMMA causes shifting in the blue direction and there is no chemical bonding between the prepared composites components,butthere is a significant increase in the rate of permeabilityat higherY2O3 ratio. This addition causes the hardness to be increased linearly. Morphology results showed, that the lower ratios of Y2O3 causes the surface became smoother and homogeneous, while higher ratios increase the roughness of the surface. These compositesgive piezoelectric behavior where the electrical resistance decreases by increasing the pressure. With regard to the dielectric properties the losses coefficient increase by increasing the frequency while dielectric constant decreases. The composites showed to be more hydrophilic by increasing theY2O3 ratio,which suggests these composites for water storage applications. The results show possibility of using these composites as humidity sensorsin relative humidity less than 70%, where the electrical resistivity decreases as the relative humidity increasing.Â Â
Mechanical Properties of Polyvinyl Chloride Plastics Recycled Aggregate Concrete
Authors: A. Al-Azzawi Adel , S. Shalal Mustafa 
Published: July 2019

The concrete prepared with Polyvinyl chloride plastics (collected from doors and windows wastes) as recycled coarse aggregates and their concrete engineering properties are studied in the laboratory in this research. The concrete blends have an expected cylinder compressive strength of 28 MPa. In this research, the concrete blends contain plasticcoarse aggregate.The ratio of this aggregate to the total aggregate volume ranges from 0 to 1. The concrete strength properties in tension and compression are greatly affected with the plastic replacement ratio. The blends density reduces with increasing replacement ratio. For low replacement ratio, the effect is practically marginal. It is not acceptable to use ACI 318 code spilt cylinder equation for plasticaggregate concrete with higher replacement ratioÂ Â
Numerical Investigation of Fluid-Structure Interaction with Mixed Convection in an Open Cavity of Flexible Wall: Effect of Geometrical Parameters
Authors: A. Sabbar Walaa , A. Ismael Muneer , Almudhaffar Mujtaba 
Published: July 2019

The object of this paper is the mixed convection and fluid flow in a cavity consisting of a flexible wall linked to a horizontal channel. A heat source segment fixed on the bottom wall while all other solid walls are thermally insulated heats up the cavity. Fluid structure interaction (FSI)is taken into account and the arbitrary Lagrangianâ€“Eulerian (ALE) technique with FEM are adopted together to solve the discretized formulations. Impacts of various parameters on the heat exchange were investigated, these are: the channel height to cavity height ratio, represented by (H/D) = 0.5â€“1.1;heat source length, LH= 0.5 â€“ 1.5;heat source location, and Ri = 0.1- 100. The results show that (H/D) has marginal impact on the Nusselt number, where only 5% enhancement is associated at H/D = 0.7 for Ri = 100. The lower the length of the heat source is the maximal the Nusselt number. A maximum enhancement in the Nusselt number of 156% is obtained when LH is decreased from 1.5 to 0.5.Â Â
Locations Ranking using Page Rank Algorithm
Authors: A. Al-Sultany Ghaidaa , A. Abd Al-Ameer Asraa 
Published: July 2019

Nowadays, large amount of user-generated data can obtained from social media (e.g., Instagram and Flicker) .People sharing their travel experiences with geo-tagged photo through these media, and the photo itself has important information like title, tags and location.Thesetypes of data provide a new perspective for us to understand the contexts of users. In this paper we focused on tourism service by collecting and analyzing geo-tagged photo from the social media to identify the most popular tourist places and rank them based on user location. We used PageRank algorithm that rank locations based on the relation between the locations and a set of tags that discovered by weighting scheme. Thus, an intelligent location-based tourist services can be provide to people. The work experiments have shown encouraging results in terms of ranking the given locations.Â Â
Characterization of Zirconia- Hydroxyapatite Nanocomposites for Orthopedic and Dental Applications
Authors: Khahtan Sabree Israa , Saleh Mahdi Ola 
Published: July 2019

Zirconium oxide ceramic was proposed for different biomedical applications. It is used in orthopedic as hip and knee prostheses and in dentistry due to the good mechanical, biological high corrosion and wear resistance properties, addition to the aesthetic property owing to tooth like color. Zirconia stabilized with Y2O3 has the best properties for these applications. The present work aims to study the effect of (5 and 10)Wt.% hydroxyapatite (HA) as additives to 3 mol% yttria stabilized zirconia (3YSZ) nano powder matrix. The green body samples were shaped by powder technology using cold pressing then sintering at (1300 and 1400)áµ’C. The 3YSZ/ HA nanocomposites samples were characterized by XRD to investigate phase stability with varying percent's of HA and different sintering temperatures, the mechanical propertiesÂ (maximum bending strength and hardness) were investigated as a function of the HA content, the changes of the thermal expansion coefficient for composite samples were investigated using Dilatometer. The experimental results proved that additions of (5 and 10)Wt.% HA to 3YSZ matrix reduce both hardness and max. bending strength, while increasing sintering temperature from 1300áµ’C to 1400áµ’C leading to an increase in the hardness and bending strength for all composite samples. The results of thermal expansion test showed a reduction in the thermal expansion coefficient with presence of HA%, however the coefficient of 3YSZ/ 10%HA is closer to 3YSZ from 3YSZ/ 5%HA. EDS analysis shows improvement in the bioactivity of inert 3YSZ with HA% additions represented by increasing Ca and P ions on the composite samples after immersing in SBF for 6 days.Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
Experimental Investigation and Mathematical Modelling of Pressure Response for Steam Generator
Authors: A. AbdulKareem Mishaal 
Published: July 2019

Cold startup of boiler is the process of boiler operation with water at ambient temperature and pressure with all intake and discharge valves are fully closed to permit fast development of pressure.Â A mathematical model is developed to estimate the pressure response during cold startup of a perfectly insulated steam generator unit. A commercial type pressure switch is used in this unit to control and maintain the desired set point of the steam operating pressure. This mathematical model assume that the thermal properties of the supplied liquid water are temperature dependent. It is based on a novel Pressure Marching Technique that is coded using a FORTRAN language computer program. The maximum percentage error of (8.24 %) was obtained when comparing the predicted results of the mathematical model with the measured values obtained from the experimental test that was done using a (2 kW) electric steam generator unit with a volume of (30 litter) and maximum operating pressure of (8 bar). In addition, the same behavior of the predicted results was obtained when compared with results of a previously published article. It was found that the time constant of the pressure control system is directly proportional with its operating pressure set point and with the volume of the steam generator and its void fraction. A (50%) increase in the pressure set point will increase the time constant by (66.16%). Increasing the boiler volume by (166.667%) will increase the time constant by (166.677%) and increasing the boiler void fraction by (150%) will increase the time constant by (23.634%). The time constant is inversely proportional with the heating power of the steam generator. A (100%) increase in the heating power will decrease the time constant by (50%). The time constant is independent of the initial water temperature. Also, it was found that the time delay to start water evaporation is directly proportional with the volume of the steam generator. A (166.667%) increase in boiler volume will increase the time delay by (166.65%). The time delay is inversely proportional with the initial water temperature and with the heating power and void fraction of the steam generator. A (38.889%) increase in the initial water temperature will decrease the time delay by (8.882%). Increasing the heating power by (100%) will decrease the time delay by (50%) and increasing the boiler void fraction by (150%) will decrease the time delay by (16.665%). The time delay is independent on the operating pressure set point.Â Â
A Numerical study of Two-Phase flow through a Rectangular Duct with a Convergence Ribs
Authors: S.Al-Turaihi Riyadh. , Sahi Shareef Abbas , Abdalaimma Ali 
Published: July 2019

Two-phase flow in ribbed convergent rectangular upward vertical duct was studied.Water and air were usedas materials for two-phase. Numerical studies have been performed to test the influence of increased air and water discharges on the pressure profile and pressure drop through the convergent section, as the effect of increasing the convergent angle on the pressure difference across the convergent section was studied.Water inlet discharges used were between (5-20 L/min), and air discharges were between (5.833-16.666 L/min). Two test channels with convergent angles (10 and 15 degrees) were used.Computational fluid dynamics for a three-dimensional model was simulated with ANSYS fluent 18 depending on the boundary condition and governed by equations of Eulerian multiphase flow model.The results indicated that the pressure along the test channel raises as water and air discharge rise. It was observedtoo the pressure drop increases with the increase of the convergence angle.Â Â
The Virtue Role in the Sustainability of Architecture
Authors: Jaafar Hasan Alaa , Saadoon Salman Almaamori Abdullah 
Published: July 2019

Until man reaches the moderation, it must reform itself and its activities as the infrastructure of society. Since his inception on the basis of moral virtues It also help him to move towards society, thus achieving human development which in turn achieves sustainability. The research addressed virtue as an integral part of morality, from it began the teachings of religion and showed the relationship between him and his environment Based on the concept of moderation to achieve sustainability.the Search attempt to discuss the absence clear imagination of virtue concept and its role in architecture sustainability, so The research aims to clarity the role of the concept of virtue in the permanence of the architecture and its survival on the assumption that virtue has a role in the sustainability of architecture. To achieve this aim the research used Inductive methodology (descriptive, analytical) through election samples and Test, finally Take virtue into consideration in the design process Contributes to the sustainability of the building Conversely in the event of negligence, it may lead to outbreaks of vices and the factors of violence and theft that cause the abandonment of the building is The most important results.Â Â Â
A Heuristic Local Search Algorithm for Improving Cluster and Routing Stability in Sensor Networks
Authors: Manoharan L. , Ezil Sam Leni A. 
Published: July 2019

Route selection using optimal nodes in Wireless Sensor Network (WSN) is a prominent task to improve network performance without deterioration. Intrinsic characteristics of the node, network traffic are some of the reason where routing algorithms fail to prove their consistency. In such cases, the conventional routing schemes must be equipped with additional network management features to retain network performance. This manuscript proposes a Heuristic Local Search (HLS) algorithm for improving routing efficiency of WSN. This search algorithm is backboned by clustering process; the cluster head is elected by satisfying balanced network metrics: energy and distance. Congestion preventive routing considers the same objective function in selecting an outside intermediate node that mitigates packet loss due to congestion. Implication of similar objective function under different constraints streamlines routing and prolongs the operation period of the cluster head. The process of the proposed HLS is evaluated using extensive simulation for the metrics: throughput, network lifetime, cluster head changes, energy utilization and packet loss ratio.Â Â Â Â
Numerical and Experimental Study the Effect of Solid Particles Flow on Heat Pipe Performance
Authors: Hassan Al-Ghazali Hafidh , Wahhab Aljibory Mohammed , Habeeb Alkharasani Taher , . . 
Published: July 2019

A numerical work supported by experimental results was carried out to studying of passing a hot solid particle on heat pipe performance. used Ansys fluent 18.0 as a computer program, geometry was published using design modular engaged in it. 3Dimention model with the steady state was studied to knowing the temperature distributed inside the evaporator and condenser part domain, more clearly to particle behavior and streamline 2Dimention model with transient was studied also. Depended on particle of 105µm diameter and experimental measuring properties set with height range (2.5 to 5) cm inside evaporator part from box, velocity with range (0.8739 to 1.377) m/s was take in consideration, the result shown enhancement in Nusselt number by (58) % when the velocity 1.377 m/s and particle bed height 5 cm compared with the first state, pressure drop with acceptable range was measured not exceed (42) %
Survey on Privacy Preservation in Big Data for Healthcare Monitoring
Authors: Anirudh K Mangore , M Roberts Masillamani Dr. 
Published: July 2019

This paper represents the prototype of health monitoring system using Big Data. this brings several Advantage to the healthcare industry by way of providing timely patient care services, proactive disease detection, real-time monitoring among others. The major challenge faced by healthcare providers on safeguarding the confidentiality of patients’ data.if confidentiality is not well maintained, people may be unable to share their data. Because security has been investigated as a new dimension, “veracity,” in big data, we aim to exploit new challenges of big data in terms of security and devote our attention toward efficient and privacy-preserving computing in the big data era. Specifically, we primary formalize the basic architecture of big data analytics, identify the corresponding privacy requirements, and introduce an efficient and privacy Triple DES as an example in response to data mining’s efficiency and privacy requirements in the big data era. The results of this research exhibit that the proposed system has better secured database access and maintain privacy for all patient data than the traditional database.
Study of Different Features and Classification Techniques for Recognition of Handwritten Devanagari Text
Authors: Vijay Vijay , U Kharat M , V Gumaste S 
Published: July 2019

Devanagari script is most popular and an older script in India. Millions of people all over the globe are using Devanagri script for various purposes such as communication, understanding the history, record keeping, research, etc. Recognition of handwritten Devanagari word is one of the popular area of research from decades because of its wide scope of applications. Different features and techniques of classification are the most important steps in the process of recognizing Devanagari handwritten word, are described in this paper.