bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aspects of the use solar energy valorification for industrial and public lighten area
Authors: Brezoczki V M , Filip G M 
Published: March 2020

Abstract
The paper presents a viable success alternative for solar energy valorification to generate electricity for industrial lighten system and city streets lighting system in Baia Sprie town. Electricity provided by solar power plants since 2016 and used for lighting the industrial area, urban parking, street lighting, partially replacing conventional energy. Within the Romanian Regional Sustainable Development Strategy there are several measures meant to obtain electricity from renewable energy sources which do not produce negative effects for the environment, which means that the expansion of the photovoltaic plant is desirable. In accordance with the Development Strategy of the town of Baia Sprie, the increase of the plant’s productions capacity through the extension of the plant surface for can be used by private consumers in different industries (woodworking, insulating windows, tinsmithing, conservation of forest fruits etc.).
Reactive Power Consumption Analysis of a Medium Sized Factory
Authors: Chiver O , Neamt L , Barz C , Pop E , Erdei Z 
Published: March 2020

Abstract
The paper achieves a study on the reactive power consumption in case of a medium sized factory. The factories as others industrial consumers usually have the power factor lower than the neutral one (in Romania was 0.92 and now is 0.9); that is why these types of consumers have to pay for reactive power. The reason for the power factor is small (sometimes much lower than the neutral) is not always just because of inductive receptors (as transformers, induction motors, induction furnaces, etc.) but also due to some technical-organizational issues. Many of these issues could have been avoided if more attention had been paid to the proposals made by the power installations designer in the design stage and it would not have been considered only the aspect of investment costs, which, though not decreased very much, provoke much more operating costs. This paper will emphasize these features that cause additional costs with reactive power for a medium sized factory who has more substations with two transformers in each of them. It also proposes, after an analysis of the current situation, technical-organizational solutions to minimize the reactive power consumption.
Analysis of the extrusion process parameters of high strength aluminium alloys used in the aerospace industry
Authors: Hotea V , Juhasz J 
Published: March 2020

Abstract
The paper approach some aspects of the most important parameters that influence the process of extrusion and the quality of material exiting from the die such as extrusion ratio, working temperature and speed of deformation. An important advantage gained by using extrusion of high strength aluminium alloys is that different microstructures may be obtained by varying process parameters, such that optimization of processing conditions leads to improved thermo-mechanical properties. Among the multiple process parameters in aluminium extrusion, the extrudate temperature is the most important because it determines the quality of the product and indicates the possibility of increasing extrusion speed.
Precessional gear-box research regarding vibration activity behaviour
Authors: Malcoci I , Trifan N , Ciobanu R 
Published: March 2020

Abstract
An ideal dynamic system in general and precessional transmissions in particular should not generate any vibration, because vibration is equal with loss of energy and bigger sound level emission. In our previously research we were focused on different vibro-acoustical aspects regarding kinematical and power precessional planetary gear-box when precessional reducer is minimal and maximal filled with cooling and lubrication liquid at different operational speed (power precessional transmission K-H-V Type) and vibro-acoustical behaviour for kinematical precessional transmission 2K-H Type. In this paper I will analyse vibration behaviour for power precessional gearbox 2K-H Type regarding vibrations that occurs at bearings and main shaft misalignment. Vibration research and analysis will be made using GUNT PT500 Machinery Diagnostic System. Data acquisition will be made using acceleration sensor type IMI603C01 for FFT analysis in GUNT PT500.04 software. Obtained results will be compared with German standard VDI-2058 “Limit value for vibration severity”.
Consideration of the actual stage of nanomaterials used in dentistry
Authors: Pop C M , Pop Vadean A , Tascu-Stavre I 
Published: March 2020

Abstract
The present paper is meant to be a short presentation of the actual stage of nanomaterials used in dentistry. It shows some theoretical consideration regarding characteristics of some nanomaterials used in dentistry. In recent years, increasing demands for dental reconstruction, have led to the development of new materials that have multiple applications in dental medicine and which must meet aesthetic requirements, biocompatibility requirements as well as hardness or durability. Surpassing the extraction period, dentistry has entered the “restorative era” in which it is desirable to introduce new materials that will lead to the most natural restorations with the physical and chemical closest properties to those of the dental tissues. The discovery of such materials has become a definite necessity in order to achieve consistent progress in this respect. Interest in using nanomaterials, composites with nanomaterials in restorative dentistry, as well as reconstruction, is constantly increasing. It is therefore important that the mechanical properties and not only, of these materials be carefully studied and especially improved
Aspects concerning the geometric elements of the rolling deformation area
Authors: Pop E , Juhasz J 
Published: March 2020

Abstract
The paper presents an experimental and practical study of aluminium strips lamination, calculating the conformations that define plastic deformation by lamination. A sample from aluminium alloy in the shape of a band was rolled and we calculated the logarithmic deformations in lamination. We started the lamination process from a semi-finished product, with a surface for the cross-section section (S0) and it was carried out in three drawings up to a final section (S3). The deformation assessment and measurement tool, the logarithmic degree of deformation gives the extent of the plastic deformation at each drawing, and the calculated total deformation degree is useful to quantify the deformation preformed for the entire lamination process over the three drawings. If analysed in this way, the plastic deformation process, the material undergoes a higher reduction at the last drawing and an ecruisation of the band at its margin also. The preliminary usage of the coefficients defining lamination has a particular importance for practical objectives, in the carrying out of another lamination process.
Power Saving Electrochemical Processing of Low Cost MnO2@Porous Al Electrode for High Performance Supercapacitors Applications
Authors: Moharam M. M. , Sanad Moustafa M.S. , El-Sayed E.M. , Ibrahim Mai.E. 
Published: March 2020

Abstract
The supercapactive properties for MnO2 coated on porous aluminum foil Al electrodes etched using various acidic baths and ethylene glycol (EG) as additive was studied. The optimum current densities for achieving high porous surface of Al foils using galvanostatic technique are 70 and 90 mA/cm2 in case of etching from acidic solution and when ethylene glycol is added respectively. Furthermore, cyclic voltammetry, galvanostatic charge–discharge techniques and electrochemical impedance spectroscopy were performed to determine specific capacitance and cycle life of the MnO2@ porous Al foil and MnO2@porous Al-EG electrode using 0.5 M Na2SO4 as electrolyte. The cyclic voltammteric curves for the two electrodes reveal that psuedocapacitive behavior during oxidartion – reduction reaction with maximum specific capacity 221.5 F/g at scan rate 20 mV/s for MnO2@ porous Al electrode. Moreover, the galvanostatic charge–discharge tests for MnO2@porous Al electrode at current densities 0.5 and 1 A/g show good pseudocapacitive performance and cycle ability with nearly linear curves forming quite triangle shape. Also, The EIS curves for both electrodes elucidate that, the total impedance of MnO2@porous Al cell is smaller than that of MnO2@porous Al-EG cell, so, MnO2@porous Al electrode has a high ionic conductivity between active material and ionic species. In addition to, both electrodes posse’s quite similar capacitive retention about 75% after 1000 cycles and this reveals the good adhesion and less dissolution of MnO2 film.
Optimization of Spin Coated TiO2 Layer for Hole-Free Perovskite Solar Cell
Authors: Elshimy Hassan , Abdallah Tamer , Shama Ali Abou 
Published: March 2020

Abstract
The optimization of the TiO2 layer in free-hole perovskite solar cells is critical, as it strongly affects the device performance. In this study, simple FTO/TiO2/CH3NH3PbI3/C solar cells were fabricated, via two-step dipping method, with different thickness of TiO2 layer. The structure and microstructure of the TiO2 layers were investigated by X-Ray diffraction (XRD), Raman spectroscopy, and UV spectroscopy (UV-vis). The effect of different TiO2 thickness on the structure and photovoltaic performance of the fabricated devices were investigated using XRD and IV measurement, respectively. The photovoltaic parameters, including short-circuit-current (Jsc), open-circuit-voltage (Voc), Fill factor (F.F) and power conversion efficiency (PCE), were found to be strongly dependent on the thickness of TiO2 layer. The investigation showed that, efficient device can be fabricated by optimizing the TiO2 thickness, employing a thickness of 108 nm as an optimum thickness in this study.
Preparation of Silver Nanoparticles Dispersed in Almond Oil Using Laser Ablation Technique
Authors: Onsi Romany , Easawi Khaled , Abdallah Said , Negm Sohair , Talaat Hassan 
Published: March 2020

Abstract
Nanoparticle production by pulsed laser ablation (PLA) is a process that can generate pure nanoparticles (NPs) straight from a varied range of bulk substances and compounds. Silver nanoparticles (Ag NPs) are probably one of the most attractive noble metal nanostructures because of their unique and interesting physical and chemical properties. In this study, laser ablation of pure silver plate immersed in almond oil was carried out for Ag NPs production. Nd: Yag laser of wavelength 1064 nm, was used for the ablation of the Ag plate at different laser energies and ablation times. The almond oil permitted the formation of Ag NPs with a stable and homogeneity particle diameter in a reasonable time. The size distribution of the NPs was examined by High-Resolution Transmission Electron Microscopy (HRTEM). The particle sizes of the produced Ag NPs at laser energy 200 mJ in the solution at 10,15 and 20-min ablation times were 4.82, 3.11 and 1.82 nm respectively. The particle sizes of Ag NPs produced at different laser energies 150,200 and 250 mJ and at ablation time 10 min inside the solution were 5.39,4.82 and 1.92 nm respectively. The absorption peaks of the produced nanoparticles have been characterized using a UV-Vis spectrophotometer.
Effect of CdS quantum dots size on Thermal and photovoltaic parameters of quantum dots sensitized solar cells
Authors: Khalid A. , Easawi K , Abdallah S. , El-Shaarawy M.G. , Negm S. , Talaat H. 
Published: March 2020

Abstract
The effect size of CdS Quantum Dots (QDs) on thermal and photovoltaic parameters is investigated. CdS QDs were adsorbed onto TiO2 electrodes using successive ionic layer adsorption and reaction (SILAR) to act as sensitizers of quantum dots solar cells (QDSSCs). The CdS QDs sizes are estimated using optical absorption spectra and application of effective mass approximation model (EMA) as well as high resolution transmission microscopes (HRTEM). The ratio of TiO2/CdS was confirmed by energy dispersive X-ray spectroscopy (EDX). Thermal parameters (thermal diffusivity α, thermal effusivity e and thermal conductivity k are measured by using Photoacoustic (PA) Technique. The photovoltaic parameters (open circuit voltage Voc, short circuit current density Jsc, fill factor FF and efficiency η) of the assembled CdS QDs sensitized solar cells (QDSSCs) were determined under a solar illumination of 100 mW/cm2 (AM 1.5 conditions. Our results show that both the effective thermal conductivity keff and efficiency η of CdS QDs deposited on TiO2 increase as the size of CdS QDs is increased.
Producing High Workable & High Strength Concrete Mix Having 6 Hour Retardation
Authors: Elrazek Mostafa Abd , Shafy Gamal Yasser Abdel 
Published: March 2020

Abstract
The goal of this study is to work out different experiments for retarding concrete setting time, which needed to reach slump 15 cm after six hours from mixing of concrete having grade C700. Six hours comprise 1.5 hour for transporting and 4.5 hours needed for constructability method, this long time for casting concrete is owing to a long transporting time of the concrete from the plant to the site and also the time needing for casting the concrete by using the slide form of high ring concrete wall, for these reasons there are needs to retard the concrete setting time with increasing the workability for concrete, using super-plasticizers is one of the best methods to improve the properties of the concrete, from fundamental experimental investigations on retardation, setting time and the concrete mixture with high strength of 626 kg / cm2 after 7days and 755kg / cm2 after 28 days can be achievable by using super-plasticizers
Application of FSS for Microstrip Antenna for Gain Enhancement
Authors: Zaid F.N.M. , Azemi S.N. , Rashidi C.B.M. 
Published: March 2020

Abstract
In this present paper, a dual-band microstrip patch antenna (MPA) using frequency selective surface (FSS) is proposed. The dual-band MPA is designed using the rectangular shaped patch with an elliptical slot at the center of the patch and full ground plane. The FSS in this paper act as a reflection plane which is loaded onto the dual-band MPA in order to improve the gain of the antenna at higher band. The FSS is obtained by the periodic array of 3 × 5-unit cell in the x-y direction, which based on the amalgamation of a square and circular loop elements. After merging the FSS, the gain and return loss at 5 GHz increased to 0.915 dB and -25.08 dB respectively. The dual-band MPA is simulated using the FR-4 substrate with a thickness of 1.6 mm and a relative permittivity of 4.4. The overall size of the MPA and FSS is relatively compact and easy to fabricate. The proposed antenna can be used in WiMAX and WLAN applications.
Defected Ground Plane of Wearable Circular Patch Antenna
Authors: Ali A , Azemi S N , Jusoh M , Sabapathy T 
Published: March 2020

Abstract
In this paper, Circular patch antenna design with defected ground plane is designed. The antenna is designed with circular patch and defected ground plane to allow it to operate in lower frequency as well as improved the antenna gain. The antenna has a feeding port and two defected ground slots to affect the frequency of the antenna. The proposed antenna is designed and simulated using Computer Simulation Technology (CST) Studio Suite 2016. The designed antenna has an operating frequency of 2.42GHz. A prototype has been fabricated and tested using network analyser and the measured results are in a good agreement with simulations.
Simulation of differential relay for transformer protection
Authors: Azizan N S , Wooi C L , Ismail B , Arshad S N M , Isa M , Mustafa W A , Rohani MNK 
Published: March 2020

Abstract
In electric power system, transformers are an important element and their protection are critical. As the transformer might be damaged during a fault, faster and more selective protection was required. For this purpose, the design of differential protection was utilized. In this study, the differential relay simulation has been successfully done using MATLAB/Simulink. The essential approach is to protect the power transformer against internal faults and avoid interference in the power system. The evaluation has been accomplished at different fault conditions. Several types of faults including double line-to-ground, single line-to-ground and line-to-line faults are studied. Simulation studies were performed and the relays performance with different system parameters and conditions were investigated. The obtained results illustrated for the differential relay represents an appropriate action.
Development of U-Shape Slot Wearable Antenna for In-Body Communications
Authors: Kamaruddin N A , Azemi S N , Ibrahim S Z , Mrashidi C B 
Published: March 2020

Abstract
The ability to have a communication with devices implanted inside a human body will cause a great improvement in current wireless medical applications technology. Wireless Capsule Endoscopy (WCE) is a medical device that could send images from inside of human’s intestines to the sensor outside the body. However, this device has few disadvantages like its location cannot be detected once it entered the body and it also cannot be control from outside the body. Considering these factors, an antenna that has the ability to penetrate into human body tissues for in-body communication is proposed. UWB system has considered as the solution for future in-body communication devices since current standard does not allow high data rate wireless connections between implanted nodes. Low part of UWB frequency band which is 3.1 GHz to 5.0 GHz is used in this research in order to reduce the attenuation through the body tissues as the frequency increase. The design of this antenna has taken in consideration of the propagation medium which is the human body tissues. Simulation for the designed antenna was done in CST Software. The size of this antenna is designed to be compact and wearable on human body. The substrate used for this antenna is cotton to ensure comfort once it is placed on the human body. The results that are considered in this research are the S11, directivity and gain of the antenna. Both simulation results and measured results are compared to evaluate the ability of this antenna.
A Review of Oil Palm Fruit Ripeness Monitoring Using Microwave Techniques in Malaysia
Authors: You K Y , Wee F H , Lee Y S , Abbas Z , Lee K Y , Cheng E M , Khe C S , Jamlos M F 
Published: March 2020

Abstract
Palm oil products are one of the most important sources of economic and export products in Malaysia. Furthermore, now, the evolution of industry 4.0 has begun to take place globally. The development of sensors has played a role in this evolution. In this paper, various microwave sensors used in oil palm monitoring are reviewed. The advantages and disadvantages of each microwave sensor are discussed in detail. However, conventional and optical monitoring methods are also briefly described.
The Growth Morphology and Yield of Grey Oyster Mushrooms (Pleurotus sajor-caju) Subjected to Different Durations of Acoustic Sound Treatment
Authors: Hasnoel Mazidi Mazlin Nur Iman Binti , Ibrahim Roshita , Yaacob Noorulnajwa Diyana 
Published: March 2020

Abstract

Pleurotus sajor-caju (grey oyster mushroom) is a typical edible fleshy fungi. It has fruiting bodies shape like an oyster that contain high nutrient such as carbohydrates, proteins, fats, minerals and multivitamins. Due to its high nutritional values, the demand of grey oyster mushrooms keeps increasing. In this study, the effect of different durations and intervals of acoustic sound treatment on growth morphology, yield enhancement and the quality of the mushroom were studied. Using sound of fire cracker at constant intensity of 75 dB, four different acoustic sound treatments had been applied on the mushroom bags which were 5 pops at 5-day interval, 15 pops at 5-day interval, 5 pops at 10-day interval and 15 pops at 10-day interval and mushroom bags without any sound treatment acted as control. The results showed that the controls had longer time for mycellium to fill-up the bags compared to sound treated bags. Besides, controls also showed lower yield in terms of number of fruiting bodies and biological efficiencies (%) compared to all acoustic sound treated bags. However, 15 pops at 10-day interval had the shortest time taken to complete all the growth stages (mycellium growth, emergence of pinhead and formation of fruiting bodies). For colour of the mushroom, there were significant differences (P<0.05) in L* values for 15 pops at 5-day interval and no significant different (P>0.05) was observed for a* (redness) and b* (yellowness) values. Controls had the highest firmness value compared to mushroom with sound treatment. In summary, 15 pops at 10-day interval was the best treatment duration and interval as it took the shortest time for different growth stages with the greatest yield of mushrooms.
Full Reference Image Quality Assessment Algorithm based on Haar Wavelet and Edge Perceptual Similarity
Authors: Mokhtar F , Ngadiran R 
Published: March 2020

Abstract
The research on image quality assessment (IQA) has been become a hot topic in image processing. Many studies show that HVS edge information plays crucial role when human perceive the quality of an image. The proposed metric is called HEPSI. The method from HaarPSI metric is combined with edge structural similarity and a contrast map is added for pooling the structural similarity map, Validation is taken by comparing HEPSI with the well-known state-of-the-art IQA metrics: PSNR, SSIM, MSSIM, FSIM and HaarPSI over the LIVE database. Experiment shows that HEPSI achieved better performance than other 5 IQA metrics.
Designing One Degree of Freedom Nursing Robot for Stroke Rehabilitation
Authors: Mohd Noor Nurul Muthmainnah , Suhaimi Muhammad Haziq 
Published: March 2020

Abstract
Rehabilitation training is a method of post-treatment for physically injured part of body especially the stroke patients. The training task such as massage and repetition exercises are needed to help them to have a normal life as before by a physiotherapist. The physiotherapist or physical therapy is a person who has experienced to treat disease or injury by physical methods. Therefore, a main objective of this paper is to develop a nursing-care robot system that can assist the stroke patient in doing daily activities. A one-degree of freedom nursing robot was designed based on the right-hand bicep using CATIA software. This robot was associated with the electromyography (EMG) sensors in order to collect the data from the muscle contractions. Meanwhile the EMG sensor is a muscle sensor that detect an electrical potential between the two-contraction flexion or extension muscle using the polymer Ag/AgCl coated electrodes. Then, the data from the muscle was sent to the Arduino microcontroller to control the servo motor. The different angle of servo motor can give the direction of movement of the nursing-care robot. The nursing robot was activated by electrical potential from the contraction of the muscle. The value of servo angle from 0 to 100 degrees angle made the robot will move up and down. The movement of robot in up and down direction is likely same as the therapist assistance doing to their patient. The size of robot is about 600 mm × 100 mm length and width and then was fabricated using 3D printer with one degree of freedom (DOF). The limitation of this project is focusing only the hand right hand bicep brachii muscle physiotherapy exercise.