bluuebunny/crossref_metadata_2025_split huggingface dataset:
Some Theorems of Fixed Point Approximations By Iteration Processes
Authors: Maibed Z. H. , Hussein S. S. 
Published: March 2021

Abstract
The purpose of this paper, is to study different iterations algorithms types three_steps called, new iteration, M
∗ −iteration, k −iteration, and Noor-iteration, for approximation of fixed points. We show that the new iteration process is faster than the existing leading iteration processes like M
∗ −iteration, k −iteration, and Noor-iteration process, for like contraction mappings. We support our analytic proof with a numerical example.
Study of The Structure and Corrosion Behavior of Al-15%Mo Alloy
Authors: Ghelloudj O. , Gharbi A. , Bouhamla K. , Debili M. Y. , Zelmati D. , Ramoul C. E. , Chouchane T. 
Published: March 2021

Abstract
The influence of the addition of molybdenum on the structure and corrosion behaviour of aluminium was studied using optical microscopy, scanning electron microscope (SEM), potentiodynamic polarization and electrochemical impedance spectroscopy. The results show that the addition of 15%wt molybdenum causes the precipitation of the AI12Mo intermetallic phase which appears in plate form on the aAl matrix. The results of the electrochemical tests show that the addition of molybdenum displaces the corrosion potential of aluminium towards positive values from -699 mV/ECS to -633 mV/ECS and increases the charge transfer resistance from to 4752 Ω2.cm2 to 6608 Ω2.cm2.
Prediction of Stress-Strain Field and Safety Factor of a Hybrid Composite Material
Authors: Zelmati D. , Graine R. , Sehab N. , Sehab F. , Ghelloudj O. , Richi W. 
Published: March 2021

Abstract
In this work, the stress-strain field is estimated through the application of classical laminate theory. The composite material studied is a hybrid composite made from plant fibers and synthetic fibers. The law of mixtures was used, to identify, the elastic properties of the studied hybrid composite materials. The effect of fiber orientation on the mechanical behavior of the composite material is analyzed. It should be noted that the orientation is a significant parameter affecting the amplification of the stress and strain field in the material and consequently on the safety and integrity of the structure.
Optimization of The Number of Layers for A Fixed Thickness of a Composite Material Subjected to Compression Loading
Authors: Zelmati D. , Ghelloudj O. , Graine R. , Sehab N. , Sehab F. , Richi W. 
Published: March 2021

Abstract
In this paper, the effect of varying the number of layers for a fixed total thickness is investigated. In order to conserve the integrity and the safety of a multilayers composite structure, the search of the optimal number of layers in the cross section, induced the low stress-strain field intensity, is strongly recommended. Meanwhile, this study aims to show how the mechanical response of a multilayers composite plate loaded on a compression in the axial direction, changes when the number of layers increases from for a fixed total thickness.
Effect of Environmental Media on the Electrochemical Behavior of API X70 Pipeline Steel
Authors: Gharbi A. , Benayad B. , Assala O. , Bouhamla K. , Ghelloudj O. , Chettouh S. , Remili S. , Bachiri A. 
Published: March 2021

Abstract
This work investigates the corrosion behavior of X70 steel in different environments: sea sand, desert sand, mud and sea water. The principle of extracting solutions from these media consisted of mixing a soil material with distilled water, the mixture was agitated using an automatic agitator, which resulted in the extraction of solution. Potentiodynamic polarization and electrochemical impedance tests are used to characterize the samples in both media. The results show that the pipeline steel X70 has an excellent corrosion resistance in the sea sand solution, resulting in a low corrosion current density compared to other media. The impedance diagrams for both media are characterized by two capacitive loops, the first loop is attributed to charge transfer processes and the second loop is related to diffusion phenomena. The observation of corroded surfaces shows that the corrosion mechanism in different media is by pitting.
A Comparison Between Genetic Algorithm and Practical Swarm to Investigate the Reliability Allocation of Complex Network
Authors: Abdullah Ghazi , Haddi Hassan Zahir Abdul 
Published: March 2021

Abstract
This paper focuses on the reliability of complex networks, which has been calculated as a complex system by using minimal cuts. The reliability of this system has been assigned to study the possible approaches to reliability values based on the reduction of total costs in this system. The genetic algorithm (GA) has been used to solve the allocation problem. Reliability and ability to solve complex problems and optimization also found in structures of engineering. Generally high implementation costs require high further duplicates. In addition to using GA, optimizing the swarm (PSO) and this algorithm is based on the action of the organisms living that accumulate. PSO is very close to GA because of the fact that these evolutionary approaches are all strategies, Using some probabilistic and some probable values. The main objective of this article is to investigate and compare between two algorithms GA and PSO.
Some Properties of Local Modules
Authors: Hameed Firas N. , Kalaf Karim S. 
Published: March 2021

Abstract
In this paper, we study an important concept namely local module. Some new result and properties have been studied in this note. A module M is local if it has a unique maximal submodule. We prove that when M is projective and finitely generated with largest maximal submodule, this mean M is local.
Special Arcs in Projective Plane Over Galois Field of Order Sixteen
Authors: Al-Seraji N. A. M. , Numan Z. T. 
Published: March 2021

Abstract
The main objective of this paper is to classify the special sets in the projective planes PG(2, t) with the value of t = 16, and we found the arcs of the third degree (k, 3) arcs in P
G(2, t), and the parameters of cods n, k, d were calculated and whether they are complete or incomplete, and the corresponding codes were formed.
The Applications of NP-hardness optimizations problem
Authors: Alridha Ahmed , Salman Abbas Musleh , Al-Jilawi Ahmed Sabah 
Published: March 2021

Abstract
In this paper we present a study on the problem of NP hardness and their applications in computer science. In addition, our study sheds light on the most important applications present in our daily life and how the problem of NP stiffness is an important primary focus in it. Moreover, the aim was to search for further modifications in order to obtain optimal methods for their adoption. Finally, the aim of this study is to seek to solve the decision problem of NP hardness to achieve the desired goals with the optimal result.
On the Class of Analytic and Univalent Functions Defined by Differential Operator
Authors: Saheb Audy Hatim , Al-Khafaji Aqeel Ketab 
Published: March 2021

Abstract
The main object of this article is to introduce a subclass
A

(

α
,
β
,
μ
,
τ

)
consisting of analytic and univalent functions in the open unit disk. We investigative the coefficient bound, growth and distortion theorem for this class. Furthermore, we obtain convolutions property, convex linear combination and extreme point for these functions.
Some Results on Quasi-Semiprime Submodules
Authors: Al-Ragab Omar M. , Al-Mothafar Nuhad S. 
Published: March 2021

Abstract
Let R be a commutative ring with unity and let B be a submodule of a non-zero left R-module D, B is called semiprime if whenever a

k

y ∈ B, a ∈ R, y ∈ D, k ∈ Z
+ implies a
y ∈ B. We say that a proper submodule B of an R-module D is a quasi-semiprime submodule if whenever a

k

b
y ∈ B, where a, b ∈ R, y ∈ D, k ∈ Z
+ implies that a
b
y ∈ B. Equivalently, a proper submodule B of an R-module D is said to be a quasi-semiprime submodule if and only if [B ∶ (y)] is a semiprime ideal of R for each y ∈ D. We give many results of this type of submodules.
Synthesis and Characterization of Tio2-Rgo Nanocomposite by Pulsed Laser Ablation in Liquid (PLAL-Method)
Authors: Aziz Halla M. , Al-Mamoori Mohammed H. K. , Aboud Lazein Hassan 
Published: March 2021

Abstract
The graphene oxide was prepared by the modified Hammer method, and then the rGO-TiO2 nano composite was successfully created using Q-switch Nd:YAG pulsed laser(λ=1064 nm, Energy per pulse 1000 mJ, No. of pulses 500, and the pulse duration 10 n sec) (PLAL). Prepared nanomaterials were characterized by a variety of techniques, including UV-Vis. spectroscopy, X-ray diffraction (XRD), FTIR, Field emission scanning electron microscopy (FE-SEM) and EDX. The absorption peak of GO is equal to 230 nm with energy gap 5.391 eV while The edge of absorption for the TiO2-rGO nanocomposite displays a red shift with respect of pure TiO2. Crystallite size of prepared TiO2/rGO nanocomposite was measured by XRD and is equal to 53.97 nm. The intensity of peaks C=C and peaks O-H is lower compared to peaks of pure graphene oxide, indicating the transformation of graphene oxide into reduced graphene oxide. The TiO2/rGO nanocomposite show enhanced adsorption properties. The removal efficiency of GO is 37 %, and The removal effectiveness for rGO-TiO2 nanocompound is 40 %. The TiO2-rGO nanocomposite has high dye adsorption efficiency, and Can be used for the elimination of the Rh B from aqueous solution.
Annihilator Essential Submodules
Authors: Qasim Yousef A. , Yaseen Sahira M. 
Published: March 2021

Abstract
Through this paper R represent a commutative ring with identity and all R-modules are unitary left R-modules. In this work we consider a generalization of the class of essential submodules namely annihilator essential submodules. We study the relation between the submodule and his annihilator and we give some basic properties. Also we introduce the concept of annihilator uniform modules and annihilator maximal submodules.
On Large-Small submodule and Large-Hollow module
Authors: Abduljaleel Amira A. , Yaseen Sahira M. 
Published: March 2021

Abstract
The goal of this research is to introduce the concepts of Large-small submodule and Large-hollow module and some properties of them are considered, such that a proper submodule N of an R-module M is said to be Large-small submodule, if N + K = M where K be a submodule of M, then K is essential submodule of M ( K ≤e M ). An R-module M is called Large-hollow module if every proper submodule of M is Large-small submodule in M.
Influence of machining parameters on material removal rate in chemical machining of silicon carbide (SIC).
Authors: Ibrahim Abbas F. , Huayier Abdullah F. , Abdulhusein Naeem A. 
Published: March 2021

AbstractThis study aims to discuss the effect of chemical etching parameters such as (machining temperature, machining time, etchant type, and concentration of the solution) on the material removal rate and surface roughness of ceramic materials (silicon carbide) as a specimen in chemical machining (CHM) process. This study aims to achieve the best value for the removal rate of the material as well as to obtain the best value for the surface roughness. Four levels of chemical machining process parameters were used in this study: the values of machining time (30, 50, 70, and 90) min, the etchant concentration (50, 60, 70, and 80) % and etching temperature (60, 80, 100, and 120) °C, and two etchant type (HCl, HBr). The results showed that the Taguchi method that has been performed using MINITAB 17 software gave results with good accuracy. The best value of material removal rate is obtained (0.5102) mg/min at experimentally and (0.4816) mg/min at the predictable program, when using hydrochloric acid (HCl) at temperature (100) °C, time (30) min, and etchant concentration (70) %. The best value of surface roughness is obtained (2.933) µm at experimentally and (2.9589) µm at the predictable program, when using Hydrobromic acid (HBr) at temperature (80) °C, time (50) min, and etchant concentration (50) %. The coefficient determination (R-sq.) to predict the material removal rate (MRR) and surface roughness are (91.6) and (93.7) respectively. This means the model is perfect and fit.
SEPIC Converter for Low Power LED Applications
Authors: Javeed Patan , Yadav Lochan Krishna , Venkatesh Kumar P. , Kumar Ranjit , Swaroop Shakti 
Published: March 2021

Abstract
Due to the development in light Emitting Diode (LED), white LED are on the whole utilized in homes, industries and business regions to replace the heated bulbs, non metalic bulbs, and even compact fluorescent lamp(strength saving lamp). The primary choices in those applications are high strength factor, and coffee harmonics. The input line cutting-edge harmonics is decreased and power aspect is high. in order to manipulate the LED brightness a current remarks loop is brought. The benefits of the circuit are strength conversion, no want to sense the enter voltage, voltage step-up and down, simple feedback manage, excessive electricity component and dimmable LED present day. LED performs a critical function within the enterprise and in our existence. The SEPIC converter is to increase the efficiency of LEDs and get the better overall performance than the opposite lighting fixtures utility. There are numerous reasons for the fluctuations inside the deliver voltage, here propose the use of sepic converter this could triumph over that via giving us the deliver voltage without the fluctuation.
Secure Signature Strategy for Industrial Environment with Aggregation Using Internet of Things
Authors: Sudhakaran Pradeep , Malathy C , Rajesh V , Venkata Sai Harshit N 
Published: March 2021

Abstract
Industrial Internet of Things are growing demand now-a-days. To grow the bandwidth demand it reduces the information and related signatures. Compact Aggregate Signature structure produces a steady-state cumulative-signature (AS). In this manner, the term of the CAS is evident of the number of messages or marks that need consolidation. This paper presents the primary unhindered blending of compact combined authentication framework in certificate-based setups. The suggested plot is obvious, due to the certificate-based approach, of key probate and key administration issues created in identity-based cryptography and certificate-less cryptography individually. It is the least bandwidth-consuming, being compact and combination-free, as well as the foremost compelling amassing strategy known to be dependable.
Categorization of artwork images based on painters using CNN
Authors: Mondal Kaustav , Anita H.B 
Published: March 2021

Abstract
Artworks and paintings has been an integral part of human civilization since the dawn of the Stone Age. Paintings gives more insight about any subject compared to the scriptures and documents. Archiving of digital form of paintings helps to preserve the artworks of different painters. The anticipated work is aimed for the classification of painters’ artworks. The artworks of Foreign & Indian painters are considered for the proposed work. The foreign painters’ artworks are obtained from [14]. At present, the Indian painters’ artwork dataset is not readily available. The images were downloaded from the specific genuine website [13]. Conventional Neural Network is used for Feature learning and classification. Around 20k images of artworks is used for the experiment and got an average accuracy of 85.05%.
A Study of the Ambient Air Quality in a Metropolitan City and its Improvement Using a Cyclone Separator
Authors: Harikrishnan R , Adithya Narayan K A , Rakesh Aswin , Thomas Gevargis Muramthookil , Jyothi S N 
Published: March 2021

Abstract
India stands tall in the list of the world‘s most polluted cities. It is, therefore, necessary to monitor the quality of ambient air. In this study, the Air Quality Index is calculated using the concentrations of nitrogen dioxide (NO2), sulphur dioxide (SO2) and particulate matter (PM10) in ambient air. A higher value of the Air Quality Index indicates that the air is polluted. A cyclone separator can be used to remove particulate matter from the air and thereby, improve the quality of air. As a part of the study, a cyclone separator with a collection efficiency of 92% is designed and a generic C++ code that computes the ambient Air Quality Index is developed. The Air Quality Index for nine sample locations in Delhi is determined. It has been observed that in many locations the air quality can be improved from ‘moderately polluted’ to ‘satisfactory’ after the removal of particulate matter using the cyclone separator.
Low-lying mixed symmetry states in the N=84 isotones 140Ba and 142Ce within interacting boson model-2
Authors: Qasim Hussein N. 
Published: March 2021

Abstract
The characteristics of the low-lying mixed-symmetry states for 140Ba and 142Ce in the even-even N=84 isotones are investigated within the framework of the IBM-2 model. Electromagnetic transitions, B(E2) and B(M1) were calculated. Results showed that the lowest mixed-symmetry state is for 140Ba and 142Ce nuclei. A good agreement is found between experiment and predictions made using the U (5) limit of IBM-2.
Preparation Of (Cu-TiO2) Thin Films, And Used as An Antibacterial
Authors: Suber Amel S. , Elttayef Abdul-Hussein K. , Khalaf Hana K , Abbas Seham Z. , Daood Amel H. 
Published: March 2021

Abstract
Thin films of TiO2 and TiO2: Cu have been prepared on ITO substrates using RF magnetron sputtering technique, It is worthy to say that the thickness of the coated film was in the order of (220) nm. The films annealing in air at temperature 500 °C with 2 h. Optical of structural properties were identified with various preparation conditions like Cu-doping concentration (0%, 2% and 4%). These prepared films are polycrystalline with a anatase crystal structure. The crystallinity and the size of particle of the samples of prepared were studied by (XRD), the results specified the size of particle of the samples of prepared dropped with the high of Cu doping concentrations some of the properties of structure are varied by the addition Cu levels as dopants. The films are oriented of preferentially forever the (101) direction. We have got some morphology of surface by (SEM), the results show decreasing of particle size with increasing doping concentration. The results show that the doping caused to decreased the transmittance and energy gap from (3.6 to 3.4) eV. Activity antibacterial efficiency was estimated by the un activation of E.coli. It was spotted that rising Cu levels gives better activity of antibacterial.
Enhancement the ability to pump crude oil using rubber solutions
Authors: Abud Saleh H. , Hasan Ali S. , Almaamori Mohammed , Bayan Noor 
Published: March 2021

Abstract
In this research, synthetic rubber (polystyrene-butadiene) and natural rubber (polyisoprene) were dissolved in a common solvent (Toluene) to prepare polymeric solutions by using magnetic mixer at temperatures of 35-45°C. It was observed that the degree of solubility for natural rubber was greater than that one for synthetic rubber. There is an increase in the viscosity and torque for both rubbers along with increasing the synthetic and natural rubbers concentration. Laminar behavior is observed for both polymers since Reynolds number is less than 2300. Natural rubber is more suitable to use in pipes with crude oil
A GIS-based Approach for Flood Vulnerability Assessment in Hoa Vang District, Danang City, Vietnam
Authors: An Tran Thi , Raghavan Venkatesh , Long Nguyen Vinh , Izuru Saizen , Tsutsumida Narumasa 
Published: March 2021

Abstract
Danang is a coastal city in the Central Region, VietNam which is considered as a sensitive area under the high risks of natural disasters and climate change. Located in downstream of Vu Gia - Thu Bon river system, Da Nang city is often inundated in flood season. Hoa Vang district is considered as the most flood damaged region in Danang City due to its location and topography. Assessing socio-economic vulnerability of floods is important in the management of natural disaster risks, from that developing solutions to mitigate the damage caused by floods. This study develops a flood vulnerability assessment method for the Hoa Vang district, Danang City based on the Geographic Information System (GIS). Through analyzing the inundation situation and local socio-economic conditions, the research has selected and developed a set of criteria to assess the flood vulnerability for the study area and presented in GIS environment. Based on the spatial analysis methods in GIS, the study has identified Flood Vulnerability Index (FVI) and generated the flood vulnerability map for Hoa Vang district, Danang city. The results from this study are important in order to propose the solutions for responding to flood hazard in Da Nang City.
Air Pollution Assessment Using RS and Gis in Ho Chi Minh City, Viet Nam: A Case Study of Period 2015-2019 for SO2 and NO2
Authors: Phuong Dinh Thi Kim , Nhut Mai Cong , Tri Nguyen Duc 
Published: March 2021

Abstract
Large urban areas are currently facing the problem of increasingly serious air pollution, which greatly affects human health and economic development. The sources of air pollution are mainly from industrial activities, transportation and human activities. Air pollutants data can be monitored and extracted from remote sensing images. This research aims to assess the level of NO2 and SO2 pollution in the air from data collected by OMI (Ozone Monitoring Instrument) on AURA satellite of A-Train group. Pollution levels of NO2 and SO2 will be calculated, assessed. Then, a map illustrating the trend of NO2 and SO2 in Ho Chi Minh City during the period of 2015-2019 will be made. The results of the study showed that NO2 concentration varies significantly with the seasons, relatively high in the dry season reaching 70 (μg/m3) and decreasing in the rainy season. The concentration of SO2 varies relatively evenly in the area and increases in industrial areas with concentrations ranging from 0.1 to 1.37 mg/m3. Therefore, it is necessary to speed up the rapid monitoring of air pollution in urban areas and large cities in order to get accurate, fast and timely air pollution information to have more appropriate and effective mitigation and prevention measures.
Application of Entropy weight in groundwater quality index (EWQI) and GIS for groundwater quality zoning in the Southeastern Coastal region, Vietnam
Authors: Nguyen A H , Pham N T T , Tat V M H , Truong H T , Vo P L 
Published: March 2021

Abstract
Groundwater in the Southeastern coastal region of Vietnam is exploited for many purposes, including irrigation, livestock, domestic and production activities. In this study, Groundwater Quality Index calculated by Entropy weight method (EWQI) and Geographic Information System (GIS) are applied for zoning water quality through determining the weight of each parameter in accordance with the variation of each value in terms of. Spatial distribution the suitability of groundwater use in the study area. Groundwater samples were collected from 46 wells in the dry and wet seasons in 2018 for analyzing seven selected water quality parameters, including: pH, total dissolved solids (TDS), total hardness (TH), ammonium (NH4
+-N), nitrate (NO3
−-N), sulphate (SO4
2-) and ferrous (Fe2+). The groundwater quality is divided into five (05) categories corresponding to Entropy Water Quality Index (EWQI), comprising: excellent, good, medium, poor and extremely poor. The analysis results of Entropy weight indicated that pH, NH4
+-N, NO3
−-N are the most affected on the quality of groundwater at the study area. According to EWQI results, more than 41.30% of wells’ water quality are “very good” in both the dry and wet seasons, mainly in the coastal of Ba Ria - Vung Tau province and 13.04% of the total surveyed wells in the study area are “extremely poor”, mainly in Ho Chi Minh city. Accordingly, the zoning map of Entropy weighted Water Quality Index (EWQI), showed that the area with good quality of groundwater accounts for 34.3% and 37.72% of the total study area in the dry and the rainy season, respectively.