bluuebunny/crossref_metadata_2025 huggingface dataset:
Analyse du comportement d'une machine asynchrone héxaphasée : Cas du changement de l’angle de déphasage
Authors: Bessaad Taieb , Taleb Rachid , Namoune Abdelhadi , Chabni Fayçal , Belboula Abdelkader
Published: February 2024

Dans ce contexte, le travail présenté porte sur l’étude, la modélisation d’une machine hexaphasée alimentée par un onduleur héxaphasé. Cette machine asynchrone hexaphasée (MASHP) n’est pas un système simple, car de nombreux phénomènes compliqués interviennent dans son fonctionnement, comme la saturation, l’effet de peau, etc..., [1]. L’objectif de ce travail est de présenter le modèle général de la MASHP dans le repère réel (abc). Ensuite, nous présenterons les différentes étapes permettant d’aboutir au modèle diphasé de la MASHP, obtenu à partir d’une matrice de transformation appropriée [2]. Afin de simplifier l’étude, la simulation numérique de la MASHP, le système de dimension six sera décomposé en trois sous-systèmes découplés. Après l’alimentation de la MASHP par un onduleur de tension héxaphasé sera présentée. Dans ce qui suit, nous allons étudier l’influence du changement de l’angle de déphasage sur le comportement de la MASHP et nous avons montré que les meilleures performances sont obtenues pour la configuration =30°.
A novel single sensor PV MPPT controller
Authors: Harrag Abdelghani , Daili Yacine
Published: February 2024

This paper proposes a novel single sensor maximum power point tracking method for PV system composed of Solarex MSX-60W PV panel operating at variable atmospheric conditions and DC-DC boost converter controlled using the proposed MPPT that uses only one sensor in order to reduce the cost and the complexity of the MPPT controller. The performance of the proposed single sensor MPPT controller is evaluated using the implemented Matlab/Simulink PV power system model. Simulation results show that the proposed single sensor MPPT controller can provide similar results using only one sensor compared to the conventional two sensors MPPT.
Etude numérique de la convection thermique dans un milieu poreux
Authors: Ouarhlent Fouzia , Soudani Azeddine
Published: February 2024

Ce travail porte sur une simulation numérique de la convection naturelle stationnaire, dans une enceinte de forme cubique. L’enceinte est partiellement poreuse homogène et isotrope. Les parois horizontales de l’enceinte sont adiabatiques imperméables. Les parois verticales de la cavité sont soumises à des températures constantes (des conditions aux limites de type Dirichlet), et le fluide est de l’air. L’écoulement dans le milieu poreux est modélisé par le modèle de Darcy-Brinkman-Forchheimer. La méthode numérique des volumes finis est utilisée pour la résolution des équations de continuité, de quantité de mouvement, et de l’énergie. Les résultats obtenues ont permis d’étudier l’influence des nombres de Rayleigh, de Darcy, et l’épaisseur adimensionnelle de la couche poreuse sur le transfert thermique. Les résultats obtenus indiquent que l’augmentation de Nu est proportionnelle à l’augmentation des nombres de Rayleigh et de Darcy et inversement proportionnelle à l’épaisseur adimensionnelle de la couche poreuse.
Effet d’un dissipateur de chaleur sur le refroidissement des composants électroniques
Authors: Belmiloud Mohamed Amine
Published: February 2024

Dans cet article, l’influence du nombre et la hauteur des ailettes d’un dissipateur de chaleur sur le transfert thermique par convection mixte dans une cavité renfermant des composants électroniques a été simulé numériquement. Le nombre d’ailettes dans le dissipateur de chaleur varie entre 4 et 10. La hauteur des ailettes est prise de 0.01 m jusqu’à 0.035 m. Comme composant électronique, on a considéré un microprocesseur d’une puissance de 20 W et placé en dessous du dissipateur de chaleur avec l’hypothèse que les autres composants sont adiabatiques. Le fluide étudié est soufflé et pulsé dans la cavité par un ventilateur. Le nombre de Prandtl est supposé constant et égal à 0.71. La simulation en question, a été menée en exploitant un logiciel sous environnement IAO avec un solveur en éléments finis. Les résultats dégagés suite à cette simulation montrent que, l’augmentation du nombre et la hauteur des chicanes améliore la quantité de chaleur dégagée par le dissipateur.
A modified perturb and observe maximum power point tracking algorithm for a standalone single phase photovoltaic system using boost converter
Authors: Taïssala Awe , Djongyang Noël , Tom Ahmat , Nicodem Nisso
Published: February 2024

The photovoltaic solar energy becomes more and more one of the most abundant and an alternative source of electric energy. But its efficiency is very low. For this reason, several Maximum Power Point Tracking algorithms are used to track de maximum power. This paper proposes a modified Perturb and Observe (P&O) algorithm using a boost chopper. That algorithm was implemented under Matlab/Simulink/Simpowersystems/Simelectronics platform. Results obtained showed that the proposed algorithm gives better results compared to the conventional P&O algorithm. In fact, the extracted power’s ripple factor using the conventional P&O method varies from 3.35 % to 5.30 %. Whereas the extracted power’s ripple factor using the 'modified P&O' varies from 1.41 % to 2.86 %.
Effect of the permanent magnets locations on the voltage generated by permanent magnet generator
Authors: Benyoucef Djilali , Taleb Rachid , Helaimi M'hamed
Published: February 2024

Currently, the permanent magnet generators find wide application in the renewable energies field such as the conversion of the wind energy or the tidal energy to an electrical energy. The main objective of this work is the calculation of the magnetic field created by the permanent magnets of the both selected rotor types (magnets on surface and inset type magnets) by taking into account the rotation of the rotor, and therefore the calculation of the electric field induced in the stator, which allows us to calculate the electromotive force exerted on the conductors of the stator coils in order to know the induced voltage by each generator, then, we make a comparison between them to determine the type of generator most answered in the industry. To reach our goal we use the finite elements method to solve the partial derivative equations those describe this physics problem.
Approche Expérimentale de la Cinétique de Séchage de la Verveine (Lippia Citriodora)
Authors: Belghit Abdelhamid , Kouhila Mounir , Boutaleb Bouchra
Published: February 2024

Cet article se propose de contribuer à l’optimisation et au dimensionnement des séchoirs solaires pour plantes médicinales, en déterminant expérimentalement les isothermes de sorption de la verveine pour différentes températures. Ensuite, l’influence de la vitesse de l’air asséchant, de sa température et de son humidité sur la cinétique de séchage du produit dans un séchoir tunnel, est étudiée. La courbe caractéristique de séchage et par suite la corrélation exprimant la vitesse de séchage de la verveine sont élaborées à partir des résultats de l’expérience.
Microcrystalline Silicon Pin Solar Cells - Investigation of the Optoelectronic Properties -
Authors: Stiebig Helmut , Brammer Torsten , Zimmer Juergen , Lambertz Andreas , Senoussaoui Nadia , Wagner Heribert
Published: February 2024

Microcrystalline silicon deposited by plasma enhanced chemical vapor deposition is a new material for solar cell applications. To optimize the cell performance microcrystalline solar cells deposited at different silane concentration (2 - 7.2 %) in hydrogen were investigated. For these cells four characteristic features were found: the dark current of the cells decreases, the open circuit voltage increases and the blue response is reduced with increasing silane concentration. The fill factor of the pin diodes shows a maximum of larger than 70 % for cells prepared at a silane concentration between 3.5 - 5.5 %. To study the transport and recombination of the diodes we have investigated the temperature dependence of these diodes and compared the experimentally determined optoelectronic properties with simulated data. The simulations reveal that the equilibrium carrier concentration of free carriers decreases and the influence of the nucleation region of the i-layer on the blue response increases with larger silane concentration.
Numerical Simulation of Neutral Dynamics in Stationary Short - Gap Discharge in Air
Authors: Lemerini Mostefa , Bouhafs Benamar , Benyoucef Boumediene , Belaïdi Abdelkader
Published: February 2024

The numerical simulation of the variation of the neutral molecule density induced by the strong correlation between the dynamics of the electron gas and that of the neutral gas is studied in a 2-D numerical modelisation. The energy injection is simulated by a mathematical function that represents the spatial dependence of the discharge density. The simulated discharge is a positive point to plane discharge in a gap = 6 mm, in air at atmospheric pressure (760 Torr), with cylindrical symmetry. The hydrodynamic set of equations, i.e. equations of transport for mass, momentum and energy, is solved by the flux corrected transport (F.C.T.) method, in employing the procedure of time splitting for the two space variables. The space and time distributions of the fundamental hydrodynamic quantities, density and temperature of the neutral gas are obtained.
Optical Properties of Microcrystalline Thin Film Solar Cells
Authors: Senoussaoui Nadia , Repmann Tobias , Brammer Torsten , Stiebig Helmut , Wagner Heribert
Published: February 2024

Mircocrystalline silicon solar cells based on pin and nip layer sequences require an effective light trapping in the near infrared (NIR) to enhance the long wavelength spectral response. Therefore, the effect of interface roughness on the optical properties of microcrystalline pin and nip solar cells was investigated. Based on a detailed analysis of scattering properties of textured substrates the device performance of the realized solar cells deposited by plasma enhanced chemical vapor depositon is discussed. The roughness of the substrates is controlled by a chemical etching step of the ZnO layer, which yields to a root mean square roughness drms between 10 and 150 nm. The pin diodes deposited on substrates with a roughness exceeding 40 nm show a similar red response although the haze and the angle resolved scattering properties of the substrate differ significantly. It is also found that light trapping in nip structures is less effective than in pin structures.
Influence des Conditions d’Ejection sur les Grandeurs Dynamique et Thermique d’un Ecoulement de Type Jet Axisymétrique en Régime Laminaire
Authors: Habli Sabra , Mhiri Hatem , El Golli Salem , Le Palec Georges , Bournot Philippe
Published: February 2024

Une méthode aux différences finies est utilisée pour résoudre les équations régissant un écoulement de type jet axisymétrique en régime laminaire. La discussion porte essentiellement sur la présentation des différentes caractéristiques dynamiques et thermiques pour décrire l’écoulement dans les trois régions du jet. L’influence des conditions d’émission à la sortie de la buse a été aussi traitée, nous avons considéré pour cela des profils de vitesse et de température uniformes ou paraboliques. Nous montrons que l’influence des conditions à la sortie de la buse est importante, dans la région du jet. La zone dans laquelle il n’est plus possible de déceler des différences dues aux conditions d’émission est située beaucoup plus loin et elle dépend des nombres sans dimensions Reynolds et Grashof.
Simulation du Stockage de l'Energie Thermique dans un Lit Fixe de Sphères Contenant un Matériau à Changement de Phase
Authors: Benmansour Abdeldjellil , Hamdan Mohammad
Published: February 2024

Ce travail présente une étude numérique du stockage de l'énergie thermique par chaleur latente à basses températures (0 °C à 100 °C) dans un lit cylindrique rempli de sphères uniformes, disposées au hasard et contenant chacune un matériau à changement de phase (MCP), traversé par un flux d’air. Un modèle numérique mono dimensionnel à deux phases séparées est appliqué. Il a permis de prédire la distribution axiale de la température du fluide et du matériau fusible le long du lit ainsi que les performances de ce lit fixe dans les deux modes de stockage et de récupération de la chaleur pour une température du fluide à l’entrée constante et un nombre de Reynolds variable. Le modèle développé s’applique à la fois pour un processus de changement de phase isotherme et non isotherme. L’évolution de la température à l’intérieur du lit a permis de déterminer les domaines de stockage les plus efficaces et de définir par conséquent les dimensions optimales de l’unité de stockage.
Modélisation des Pertes Thermiques dans un Capteur Solaire à Air à deux Passes
Authors: Zerrouki Ahmed , Tedjiza Bilal , Said Noureddine
Published: February 2024

Cette étude porte sur une modélisation mathématique d’un capteur solaire à air de conception conventionnelle à deux passes (circulation d'air de part et d'autres de l'absorbeur). Nous avons étudié le cas où le capteur est dans un état tel que les conditions de BLISS sont respectées. Nous avons établi un bilan thermique respectivement sur la couverture transparente, l'absorbeur puis l'isolation thermique arrière. Nous avons résolu le système d’equations obtenus. Nous avons ensuite fourni les expressions mathématiques exactes des paramètres UL ,Fr et F’. Une représentation graphique de ces paramètres a été présentée.
Classification des Eclairements Solaires à l’Aide de l’Analyse Fractale
Authors: Harrouni Samia , Maafi Abdelbaki
Published: February 2024

Cet article concerne la modélisation fractale des éclairements solaires dans le but de quantifier leurs fluctuations aléatoires et réaliser leur classification en fonction de l'état du ciel. La mise au point de la modélisation a été effectuée à l'aide de mesures de l'éclairement global réalisées à un pas de temps de 10 minutes dans les sites de Tahifet et d'Imehrou situés dans le grand sud Algérien. Les résultats obtenus montrent que la combinaison de la dimension fractale et de l'indice de clarté comme critères de classification permet d'aboutir à 3 types de temps dans les sites considérés qui sont : ciel clair, ciel partiellement couvert et ciel couvert.
Hardware and Software Considerations to Use NOAA Images
Authors: Benabadji Noureddine , Hassini Abdelatif , Belbachir Ahmed Hafid
Published: February 2024

The techniques of weather satellites images reception has quickly evolved in the last decade. At the beginning, the operation of building a reception station required considerable means, and only specialized institutions had access to these techniques. Nowadays, because of the recent development of micro-computers and signal processing, it is now possible for even a small institution to have its own station able to receive net images from certain meteorological satellites such as NOAA and METEOSAT satellites with affordable costs. A reception station for certain meteorological satellites has been mounted and operated in our laboratory. A description of this station and of the set of software necessary for the reception and the processing of the APT images is given. Indications of the use of some software as well as their application for processing a sample of the received images are presented. We point out that the station allows image processing in real time
Etude par Spectroscopie XPS du Rôle de l’Hydrogène et de la Température sur la Ségrégation du Cérium dans le Composé Intermétallique CeNi2
Authors: Roustila Atika , Chêne Jacques
Published: February 2024

L’étude du rôle de l’hydrogène et de la température sur les propriétés électroniques de la surface du composé intermétallique CeNi2 a été entreprise par spectroscopie de photoélectrons X. Cette technique a permis de suivre l’évolution des propriétés électroniques, avant et après hydrogénation en phase gazeuse in situ, au cours de différents maintiens en température. Cette étude montre que l’hydrogénation in situ du composé intermétallique CeNi2 conduit à des résultats similaires à ceux obtenus par hydrogénation cathodique. Des modifications notables dans la structure électronique (niveaux de coeur, densité d’état au niveau de Fermi) ont été observées par photoémission X sur la surface du composé intermétallique CeNi2 après hydrogénation. Le maintien en température conduit à une décontamination de la surface. La présence d’hydrogène favorise la ségrégation du cérium à température élevée sur la surface de CeNi2.
Optimisation et Conception d'une Grille Collectrice Appliquée aux Photopiles Fonctionnant sous Haute Concentration Solaire
Authors: Cheknane Ali , Benyoucef Boumediene , Charles Jean-Pierre , Zerdoum Radia
Published: February 2024

L’objectif du présent travail est d’optimiser les dimensions géométriques de la grille de collecte des cellules solaires sous forte concentration. A ce sujet, une étude bidimensionnelle fixe le dessin des masques de la grille. Notre optimisation s’articulera sur deux modèles de grille, un modèle linéaire et un autre circulaire. Dans cette dernière, nous proposons un modèle mathématique qui sert à la minimisation des pertes de puissance, par conséquent l'amélioration du rendement de conversion. Le taux d'ombre constitue une forme de perte pour les deux modèles. Sa minimisation ne doit pas être réalisée au détriment du coefficient de transparence. Donc, nous sommes amenés, dans notre étude, à choisir un compromis, en introduisant ainsi le taux de conduction qui représente les pertes par effet Joule. A partir du point d’intersection des deux courbes (le taux de conduction et le taux d’ombre en fonction de la dimension à optimiser), nous déduisons les dimensions optimales de la grille.
Three-Dimensional Conjugate Conduction-Mixed Convection with Variable Fluid Properties in a Heated Horizontal Pipe
Authors: Boufendi Toufik , Afrid Mohamed
Published: February 2024

This study concerns the numerical simulation of the three dimensional conjugate conduction-mixed convection heat transfer in a horizontal heated pipe with a small wall thickness. The fluid physical properties are variable with temperature and the heat losses from the outer surface of the pipe to the ambient are considered. The model equations of continuity, momenta and energy are numerically solved with a finite volume method. The obtained results show that the thermal and the flow fields are three-dimensional, the non-uniformity of the heat flux at the interface wall-fluid is significant and the mean Nusselt number in the pipe is considerably increased. The numerical results of our study are in good agreement with those of an experimental work done with the same geometric, dynamic and thermal parameters.
Isothermes d’Adsorption des Abricots Secs à 25 °C et 45 °C
Authors: Ferradji Ali , Malek Ali
Published: February 2024

Les isothermes de sorption déterminées sont de type II caractérisées par une forme sigmoïdale. L’étude de l’effet de température a montré qu’aux valeurs des activités de l’eau supérieures à 0.6, les teneurs en eau sont importantes, lorsque la température est élevée. Ceci est expliqué par la dissolution endothermique des sucres aux activités de l’eau élevée. L’équation de GAB a été utilisée pour déterminer la teneur en eau de la couche mono-moléculaire. La valeur de la chaleur de sorption isostérique montre que l’intensité d’interaction entre la vapeur d’eau et l’adsorbant augmente lorsque la teneur en eau diminue.
Traitement des effluents issus des opérations technologiques de décapage et de dégraissage des plaquettes de silicium en salle blanche par un procédé d’électrocoagulation et caractérisation des boues produites
Authors: Drouiche Nadjib , Hecini Mouna , Maallemi Abderrezak
Published: February 2024

La fabrication des cellules photovoltaïques (PV) nécessite un traitement de surface des plaquettes de silicium. Ce traitement acido-basique génère des déchets organiques et minéraux. Pour remédier à ce problème le procédé d’électrocoagulation a été utilisé comme alternative pour le traitement de ces effluents aux fins de protection de l’environnement.
Etude expérimentale du capteur hybride photovoltaïque thermique
Authors: Touafek Khaled , Malek Ali , Haddadi Mourad
Published: February 2024

La température des modules photovoltaïques peut être abaissée par extraction de la chaleur à l’aide d’une circulation naturelle ou forcée adéquate d’un fluide. La chaleur extraite pourrait alors être utilisée pour chauffer de l’eau ou transformée en une autre énergie. On augmenterait ainsi le rendement électrique du capteur et exploiter l’énergie thermique recueillie. L’objectif de notre travail est d’étudier expérimentalement et de mettre en oeuvre un prototype de capteur hybride pour évaluer ses performances électriques et thermiques. Les résultats obtenus permettent de penser que ce type de capteur constitue une bonne alternative aux modules photovoltaïques et aux capteurs thermiques classiques installés séparément.
Modèle de bilan hydrique d’une serre horticole Application à l’identification
Authors: Draoui Belkacem , Boulard Thierry , Neirac François Pascal , Baille Alain
Published: February 2024

WUne méthodologie de caractérisation du bilan hydrique d’une serre horticole en régime dynamique a été développée. Un modèle réduit de connaissance a été établi à partir des équations biophysiques décrivant les principaux phénomènes, débouchant sur un modèle paramétrique. Ce modèle de comportement a été validé sur site, par mesure de ses entrées (sollicitations extérieures) et sa sortie (humidité,.). Finalement, les valeurs numériques des paramètres du modèle simplifié ont été identifiées et validées, à partir de mesures expérimentales et les propriétés prédictives du modèle ont été testées avec succès en utilisant des séquences de mesure n’ayant pas servi à l’identification des valeurs des paramètres du modèle.
Contribution à l’étude du trouble atmosphérique de Linke sur le site de Ghardaïa
Authors: Bouhadda Youcef , Serir Lazhar
Published: February 2024

Dans ce travail, nous allons représenter une étude sur le trouble atmosphérique, en se focalisant sur le facteur de trouble de Linke. Nous avons utilisé deux formulations différentes: Kasten et Ineichen pour déterminer expérimentalement ce facteur. Nous avons mesuré le facteur de Linke durant une année (entre le 01/09/2004 et 01/09/2005) à Ghardaïa en utilisant ces deux formulations. Les résultats seront interprétés en utilisant les observations météorologiques à la fin de ce travail.
Simulation of photovoltaic grid connected inverter in case of grid-failure
Authors: Chouder Aissa , Silvestre Santiago , Malek Ali
Published: February 2024

In this paper, a behavioural model of photovoltaic grid connected system is presented and simulated. The photovoltaic generator and a single phase inverter are modelled both by the well known one diode model and a current controlled voltage source respectively. The indirect current control method has been applied to achieve the inverter current control in order to feed a sinusoidal current waveform to the ac grid. Finally, normal and faulty conditions of the photovoltaic generation, especially in the case of grid failure, were simulated and commented.
Analyzing Collaborative Technology Wi-Fi Bluetooth for localization in Indoor Positioning System in indoor premises
Authors: Thakur Kavita , Dongre Dr. Vinitkumar
Published: February 2024

For tracking people or object’s Location in the indoor environments, a network device is suggested known as IPS.. This technology mainly used because of supervising the health, position, guidance in different sectors like Universities, museums, airports, hospitals and warehouses the main advantages of IPS with distinct feature like reduction of material and energy cost over time that has huge impact compared to other technology which are more costly. Among various technology like (UWB) Wireless Fidelity (Wi-Fi) Bluetooth Low Energy (BLE). (Wi-Fi)Technology is an outstanding approach for indoor navigation and positioning due to already available Wi-Fi Infrastructure Wireless IPS has categorized into two approaches :geometrical –calculation based and Scene –Analysis based former relies on measurement of geometrical parameter of Distance and angles by physical characteristics of Signal. RSS is the performance parameter used for achieving robustness and accuracy which is most concerned factor for current scenario Most Recent Research has solved the problem of inconsistency on Received Signal Strength (RSS) using fingerprint method. But the RSSI that received may contain some noise. This paper mainly proposed a method to estimate or tracking the real position of dynamic user. With RSSI value as input to be processed and the result of it will be a location (x, y) value, repeat the process to create an estimate coordinate map of route taken. Our proposed method is based on fingerprinting with weighted sum of four nearest reference access point to estimate the position of dynamic user then using Extended Kalman Filter as a tracking algorithm. In this paper we try new ways to collect the data of RSS by dynamically collecting the data in many routes to see whether the proposed algorithm could estimate the position better. We achieve an average mean of error around 2cm using Weighted Sum using Extended Kalman Filter tested on dynamic data. Key words: Indoor Positioning System, Dynamic User Localization, Fingerprinting Method, Weighted Sum Model, Extended Kalman Filter
Built Custom Alexa Skills using AWS
Authors:   Assistant Professor,Miet, Pratap Preksha
Published: February 2024

Abstract:The creation of unique Alexa skills using the Amazon Web Services (AWS) infrastructure is the focus of this project. Alexa skills are voice- activated features that improve Alexa, the virtual assistant from Amazon, in terms of functionality. The project's main goal is to demonstrate the flexibility and adaptability of AWS in voice- activated interactions by developing custom skills that are suited to certain use cases or applications. During the development process, the bespoke Alexa skills are hosted and executed using AWS Lambda, an event-driven computing service. With AWS Lambda, code can be seamlessly integrated without requiring server management, guaranteeing a scalable and effective solution. The stability and dependability of the custom Alexa skills are further enhanced by the extensive suite of tools and services offered by AWS, including the Alexa Skills Kit (ASK), DynamoDB for data storage, and IAM (Identity and Access Management) for security. The complexities of voice-activated technologies, AWS infrastructure, and Alexa skill development are investigated through this research. With the help of the Alexa ecosystem and customized skills, companies, developers, and enthusiasts can use AWS's power to create unique and interesting voice experiences. The project's main ideas are summarized in this abstract, which highlights the use of AWS technology to develop customized and inventive Alexa skills. Keywords:Custom Alexa skills, AWS, Voice- activated technology, Alexa Skills Kit, AWS Lambda, DynamoDB, IAM.
To study the effect of polypropylene fibre in concrete to increase the strength of concrete structures
Authors: Journal IJSREM
Published: February 2024

The research project on the impact of polypropylene Fibercon on the strength of concrete structures will be beneficial in its potential application in conventional construction works as well as repair works, as the scarcity of conventional construction materials is causing many problems in construction practices like refurbishment or the construction of new structures. In the proposed effort, the use of polypropylene fibers as a reinforcing material for concrete buildings will be thoroughly examined. Flexural strength, tensile strength, and compressive strength are the parameters that will be examined in order to analyze the performance. Key Words: Compressive strength, Eco -friendly, Economical, Polypropylene fibre, seismic resistance.
Social Media Web Application – REVAGRAM
Authors:   Computer Science and Information Technology REVA UNIVERSITY Bengaluru,India, Polapragada Nikhil
Published: February 2024

Technology is a tool that helps us live mythically. In the modern era when “Everything you imagine can be made real” is the momentum, then bringing humans in conjunction cerebrally is not difficult, Social Networking is one such domain. It is inevitable to ignore the fact that nowadays social network plays an essential role in our daily lives. It makes our lives easier and efficient. It has become the rage of this age. In order to ensure that all the students of an educational institution have communal interaction in which they create, share or exchange information and ideas on virtual streams, we bring forth a social media application REVAGRAM. Social media web applications have transformed the way we communicate and interact with each other, and their influence is only set to continue to grow in the years ahead. As these platforms continue to evolve and develop, it will be important for social media companies, governments, and individuals to work together to address the challenges and opportunities presented by this rapidly changing digital landscape. Keywords—social media for college, online learning, social media for students
Literature Analysis on Three Dimensional Object Recognition using Deep Learning
Authors: Sankari Mrs. K. Siva , Bama Dr. B. Sathya
Published: February 2024

The subject of 3D object identification (segmentation, detection, and classification) has received much research in the areas of computer vision, graphics, and machine learning. Recently, deep learning algorithms have surpassed traditional methods for 3D segmentation problems because of their success in 2D computer vision. As a result, a number of novel methods have been developed and tested on a range of gold-standard datasets.In order for the pattern recognition system to correctly identify the item, the features must be extracted in a form that is compatible with the chosen identification technique. The location from which the features are collected does not matter. Local feature extraction and global feature extraction are the two halves of the object recognition approach.This paper provides a comprehensive analysis of the most recent advances in deep learning-based 3D object recognition. We review the most popular 3D object recognition models and evaluate their salient features. Keywords:Deep Learning, Computer Vision, Object Recognition, 3D Objects
Efficiency Assessment of a Combined Heat and Power Plant Using Exergy Analysis
Authors: Abuel Paul Mikii , Mridul Abir Hossain , Ekpotu Wilson Fidelis
Published: February 2024

This study conducted an exergy analysis of a cogeneration power plant utilizing gas turbines, air compressors, combustion chambers, heat recovery steam generators, heat exchangers, and pumps. The study performed an extensive exergy analysis of the system, focusing on each component's process and calculating its base efficiency while tabulating the corresponding exergy degradation. Relevant equations for mass, energy, and exergy were identified to determine optimal control volume conditions for an optimal system and boundary conditions that would enhance the design and reduce exergy destruction. The research project developed revisions and modifications necessary to the base system, utilizing available parameters and boundary conditions, to enable a second law analysis, improve the overall efficiency, and reduce irreversibility and the loss of exergy. The proposed modifications included the remodelling of the cogeneration plant by applying additional processes to utilize the excessive waste heat in the plant. The study further optimized the plant's efficiency by modifying individual system elements that yielded minimal exergy destruction to the overall design. The proposed modifications explored the best-case alteration on optimizing overall plant efficiency with minimum irreversibility compared to the initial analysis done. The technical contributions of this research project are the revisions and modifications that enabled a second law analysis and improved the overall efficiency of the cogeneration power plant.
Ishak Imamovic, a Qadi and a Book Author in Australia
Authors: Haveric Dzavid
Published: February 2024

This is the little-known story about an Australian sheikh, Ishak Imamovic, a qadi (Sharia judge) of Bosnian Muslim ethnic origin (Bosniak), and his forgotten pioneering book, the Outlines of Islamic Doctrine, which was published in Australia. The article comprises three parts: Ishak settling in Australia, his community engagement and a review of his book. It links Ishak’s ethnic background, adjustment to a new homeland and Muslim Australianness through his contributions to the Bosnian ethnic and multi-ethnic Muslim communities in Queensland, and his scholarly book. This article considers Ishak as a first qadi and Muslim book author, especially after the Second World War in Australia. However, his scholarly legacy is still unknown among Australian Muslim and non-Muslim scholars and students. The article is an “Ishak’s call” for better understanding of Islamic ideals and social virtues in the context of his legal considerations. It is primarily based on my discovery of his book, remarks from his descendants, friends and scholars, and the available archival data I read during my field trips to Brisbane in 1997, 2017 and 2023. By doing so, this article recommends reading Ishak’s 1971 magnum opus against scholarly ignorance and oblivion.
Knowledge of the Milky Way in the Arabic Cultural Region between the 8th and 15th Centuries
Authors: Eckart Andreas , Idriz Mesut
Published: February 2024

We use a comparison of texts by several Arabic authors from the 8.-15. century inorder to explore the role of Milky Way in the early Islamic civilization until the 15thcentury. We refer to texts by Ibn al-Haytham, Ibn Rahiq, Ibn Majid, and al-Marzouqi.First we discuss the description of the Milky Way given by al-Marzouqi in the 21.chapter of his Kitab al-Azminah wa al-Amkinah. Al-Marzouqi also points out how theMilky Way can be used to determine the direction of prayer.Second we discuss Ibn al-Haytham's finding that in comparison with the Moon theMilky Way has no measurable parallax, must belong to the realm of the stars.We compare the situation at Ibn al-Haytham's time to that of the Great Debate in 1920.

Milky Way: role in early Islamic civilization, astronomical description, Great Debate
Eye-Tracking como correlato fisiológico do comportamento do consumidor:
Authors: Pereira Marcelo Henrique Neves , Melo Felipe Luiz Neves Bezerra de , Soares Ana Maria Jerônimo , Ferreira Pabllo Barcellos Soares , Silva Marcos Paulo da , Morya Edgard
Published: February 2024

Objetivo: Este estudo analisa, por meio de uma revisão sistemática da literatura, quais as principais abordagens utilizadas em pesquisas sobre comportamento do consumidor que usaram o método eye-tracking como identificador de reações fisiológicas.
Método: O protocolo Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) foi utilizado para identificar e selecionar estudos empíricos publicados nos últimos cinco anos, entre 2019 e 2023, em nove bases de pesquisa (Web of Science, Science Direct, Scopus, Springer, Emerald, Wiley Online, Sage, Taylor & Francis e Google Acadêmico). Assim, 243 estudos foram incluídos na revisão.
Resultados: Os estudos analisados se enquadram, sobretudo, em quatro diferentes temas de aplicação de neuromarketing: decisão de compra, previsão comportamental, efeitos da publicidade e retenção de consumidores. Os principais segmentos analisados foram o comércio eletrônico e o varejo. Destaca-se a predominância de estudos quantitativos e a necessidade de controlar variáveis sociodemográficas nos modelos. Em síntese, sugere-se uma maior aplicação da abordagem multimétodo, que combine o rastreamento ocular com métodos quantitativos e qualitativos (entrevistas retrospectivas), bem como o integre com outras técnicas como Eletroencefalografia (EEG), imagem de ressonância magnética (MRI), resposta galvânica (GSR), biometria facial, entre outras.
Contribuições Teóricas/Metodológicas: Esta pesquisa avança na compreensão do estado da arte sobre rastreamento ocular e sua aplicação no neuromarketing, apresentando insights sobre caminhos metodológicos.
Originalidade/Relevância: Por conseguinte, são discutidas as principais aplicações e temas emergentes que podem ser explorados em estudos futuros. A proposta foi previamente cadastrada no PROSPERO (CRD42022315763) e, até o momento do registro, não havia outro protocolo semelhante.
Neuromarketing
Authors: Camargo Shirlei Miranda
Published: February 2024

Objetivo: Descobrir o que desperta mais a atenção e gera maior confiança nos consumidores em ambientes virtuais - posts com rostos ou com objetos que simulam um rosto (pareidolia) frente a posts com objetos comuns.
Método: Pesquisa quantitativa realizada por meio de um experimento realizado com 90 estudantes de Universidades do Sul do Brasil.
Originalidade/Relevância: Existe uma superexposição às informações que dificulta atrair a atenção dos consumidores.  Porém segundo Guido et al. (2019), o rosto humano é um elemento que chama a atenção, portanto, uma solução seria utilizá-lo (ou objetos que o lembram - pareidolia). Contudo, há poucos estudos sobre isso. Logo, se contribui trazendo insights sobre o uso de rostos/pareidolia em anúncios online.
Resultados: ao comparar posts com objetos que lembram um rosto, com rostos reais e com objetos comuns, verificou-se que aquele com objetos que lembram um rosto (pareidolia) chamam mais a atenção que os demais em anúncios online.
Contribuições teóricas/metodológicas: O tema “rosto” é pouco estudado (Ma et al., 2021, Chen et al., 2023). Logo, a contribuição teórica desse estudo é trazer indícios que imagens contendo objetos que lembram um rosto (pareidolia) podem ser consideradas superiores nessa tarefa.
Contribuições sociais / para a gestão: Com esses resultados, os gestores podem repensar suas estratégias para se destacar em meio ao excesso de informações. Por exemplo, utilizando em posts objetos que lembrem um rosto humano para chamar a atenção dos consumidores.
Health education as a strategy for improving quality of life
Authors: Fernandes Priscila Castro Cordeiro , Carvalho Daniela Diniz Simões de Medeiros , Alexandre Anderson de Oliveira , Nascimento Andrea , Jorge Eduardo Rodrigues , De Toledo Luiz Alexandre Pereira , Jiticovski Alessandra Ferreira Mendes , Machado Adriana de Castro , Da Silva Joana Darc Ferreira , Da Silva Kênya Costa Rodrigues
Published: February 2024

The study addresses the intricate interaction between education, health, quality of life, and intrinsic and extrinsic factors, highlighting the importance of these elements in shaping individual and collective well-being. Education is recognized as a comprehensive process of knowledge transmission, playing a crucial role in empowering individuals to make informed decisions about their health and quality of life. Local culture is identified as an essential component in shaping lifestyle habits, emphasizing the importance of effective local education in promoting healthy practices and community awareness. The study adopted a qualitative narrative research methodology, aiming to synthesize available knowledge on the topic through national theoretical references from the Scielo and LILACS databases. The analysis focused on the relevance of health education as a strategy for improving quality of life. Results and discussions underline the significant influence of education on health, indicating that individuals with higher education levels have better health literacy. The discussion extends to the influence of current policies, represented by the Unified Health System and fund transfer programs that prioritize education, establishing conditions that promote access to information and health. The conclusion emphasizes the intrinsic connection of these issues to quality of life, highlighting the importance of investing in education to empower individuals to interpret information and promote their health.
Covid-19 pandemic: and the need to adapt teaching practice
Authors: Serpa Bárbara Martina , Serpa Paulo Roberto , Xerri Leidy Luiza Ranzan , Suzko Maristela
Published: February 2024

With the pandemic that brings about COVID-19, commonly called coronavirus, the need arose in the field of education to update on teaching methodologies, such as the use of technologies and the internet in pedagogical work, without losing sight of the affectivity of relationships as an inseparable aspect to the teaching and learning process. With this, the present work aims to understand the current moment about the sudden departure from school, and the routine of the teacher. We recognize that the technical tools used, such as digital platforms and applications, collaborated to bring them closer, even in times of social distancing, maintaining links with children and adolescents, with the help of their families and/or guardians. We believe that one day classroom lessons will come back, and until then, who knows, technology may be part of the routine of families and children even after their return, thus being understood their social function of technologies, which at this moment, is as important as knowing how to read and write.
Data management practices aligned with LGPD in the data science context
Authors: Schemberger Elder Elisandro
Published: February 2024

Data management is a comprehensive process that includes data collection, storage, organization, and maintenance for efficient data analysis and use. With data generation at unprecedented volumes and at breakneck speed, effective data management has become an operational necessity and a competitive advantage. In the context of Data Science, data is the raw material for insights and innovations, making its proper management fundamental to ensure reliability and accuracy. This article stresses the importance of data governance, security and privacy, especially in view of the increase in data protection regulations such as the LGPD. It also addresses efficiency in data management as essential to driving innovation and facilitating data-driven decision-making in organizations and academia. The ability to manage large volumes of data is unique because well-managed data provides a valuable source of information, enabling trend identification, process optimization and strategic decision making, leading to innovation and competitive advantages. Also, this article discusses LGPD compliance, not only as a legal issue, but also as an opportunity for companies to build trust with their users by demonstrating a commitment to data security and privacy. Efficient data management also involves choosing appropriate tools and technologies and implementing policies that ensure data compliance and security.
The mathematics on classical ballet: connections between the beautiful and the exact
Authors: Farinha Gabriela Heloiza Lima , Alves Tiago Felipe de Oliveira
Published: February 2024

The article addresses the intrinsic relationship between classical ballet and mathematics, exploring the presence of geometric elements and symmetry in the techniques and movements of this form of dance. The research aims to explore the potential use of the golden ratio and mathematical modelling to analyze patterns, proportions, and understand the underlying physical principles of the dancers' leaps and turns. This qualitative and applied research, based on bibliographical analysis and a case study, provides a profound insight into the interaction between art and science, demonstrating how mathematics translates into beauty and harmony in classical ballet. These conclusions enrich the understanding of the interconnection between seemingly distinct disciplines, highlighting mathematics as a form of artistic expression and classical ballet as a means of mathematical expression.
File, memories, readers: document, time
Authors: De Moraes Cléa Moreira de Oliveira Cresta
Published: February 2024

The present text is the fruit of research work in the archives of the writer Pedro Nava. The research deals with the relationship of the author memoralist from Minas Gerais with his readers, who passed on to writers and allowed themselves to give opinions and suggestions to the next Pedro Nava memoirs, and who contributed with their own memoirs. The documents will be analyzed from the point of view of the Aesthetics of Reception.
Influência de fontes e doses de nutrientes na uniformidade de maturação e produtividade do cafeeiro
Authors: Da Mota Diego Henrique , Fagioli Marcelo , Correia Flávia Marina Sousa , Malaquias Juaci Vitória , Amabile Renato Fernando
Published: February 2024

A cultura do cafeeiro é influenciada por diversos fatores em seu desenvolvimento e produtividade. Dessa maneira, a demanda nutricional é um fator limitante da planta, sendo imprescindível fornecer os nutrientes por meio da adubação. O objetivo deste trabalho foi avaliar a produtividade, a massa de grãos e a uniformidade de maturação de uma lavoura de café submetida a diferentes fontes e doses de nutrientes. O experimento foi instalado em delineamento experimental em blocos casualizados, no esquema fatorial 3x4 com quatro repetições, sendo três fontes de nutrientes (convencional, polimerizado e organomineral) em quatro doses (50, 75, 100 e 125% da dose recomendada). As plantas foram colhidas pelo método de derriça no pano. Foi avaliada a produtividade, o grau de maturação e a massa de grãos. O tratamento que apresentou maior uniformidade de maturação foi o polimerizado à 100%, na safra 21/22. Os valores encontrados para a massa de grãos frescos, apresentaram que os tratamentos com melhor desempenho foram às doses de 100 e 125% na safra 22/23. A safra 21/22 apresenta ainda interação para os dois fatores analisados mostrando que as fontes convencionais e polimerizadas apresentaram maiores médias nas doses de 125%. A massa de grãos secos apresentou resultados superiores na safra 20/21 nas doses de 100 e 125%, havendo também interação para este parâmetro na safra 22/23 mostrando desempenho inferiores para fontes polimerizadas e organominerais a 50 e 75%. Os grãos beneficiados demostraram maiores valores na safra 21/22 para as doses 100 e 125%, enquanto na safra 22/23, houve interação indicando desempenho abaixo das demais para a fonte convencional à 75%. Os valores de produtividade, apresentaram interação na safra 21/22, indicando maiores produtividades para as fontes polimerizadas e organomineral nas doses de 100 e 125%, enquanto a fonte convencional apresentou resultados superiores em todas as doses testadas. Na safra 22/23 apresentaram um desempenho inferior para as doses de 50%. A fonte polimerizada proporcionou maior uniformidade de maturação. A massa de grãos frescos, secos e beneficiados foi beneficiada por doses elevadas como 100 e 125%, pincipalmente nas fontes polimerizada e organomineral, mostrando a influência da dose no enchimento e formação do grão. O mesmo foi observado para a produtividade avaliada.