bluuebunny/crossref_metadata_2025 huggingface dataset:
Constructions en SeV dans les manchettes et titres d’articles de presse (exemples de se faire + V et de constructions attributives, d’après Le Monde)
Authors: Huang Ping , Masseron Caroline
Published: July 2024

Y a-t-il, et si oui quelles en sont les caractéristiques, des constructions spécifiques en seV dans les titres de presse ? À partir de quelques exemples empruntés au Monde, nous voudrions faire la part entre les propriétés constructionnelles des seV, leur classement (verbe réfléchi, réciproque, médiopassif, etc.), et les déterminations contextuelles du titre qui éclairent le choix du verbe et sa construction d’énoncé. En d’autres termes, l’énoncé réfléchi de la manchette de presse mérite une analyse en langue et en discours. Pour répondre à ces questions, nous avons procédé à un recueil sélectif de titres de presse, et nous avons soumis les seV des énoncés à un certain nombre de tests, avant d’esquisser un classement des énoncés-types et une cartographie des constructions identifiées.L’article présente dans une première partie les différentes sous-classes des seV et s’appuie en particulier sur le travail de R. Huyghe et al. (2019). Cette première investigation, illustrée par des titres, se fonde tout particulièrement sur la commutation de seV avec sa forme correspondante non réfléchie (V) dans le but d’observer les changements intervenus sur les arguments du verbe. Ensuite, la seconde partie étudie le cas particulier des seV auxiliaire (Les résultats se font attendre ; Il s’est vu refuser l’entrée du restaurant). La troisième partie examine les seV des constructions attributives (La candidate se dit prête à endosser cette nouvelle responsabilité). En conclusion, nous dressons un bilan provisoire des analyses menées.
« S’exprimer dans un langage oral syntaxiquement correct et précis ». Syntaxe et variation en maternelle
Authors: Buson Laurence , Rousset Isabelle , Rossato Solange
Published: July 2024

Si l’importance de la syntaxe comme pivot des apprentissages langagiers en maternelle est reconnue, les programmes ne disent quasiment rien des constructions attendues à chaque étape de développement, et les réflexions théoriques sur les normes et les variations langagières peinent à s’opérationnaliser dans les ressources didactiques. Ce manque de ressources induit la persistance de pratiques pédagogiques centrées sur les apprentissages lexicaux, avec des objectifs syntaxiques annoncés mais non explicités, souvent formulés en termes de correction linguistique, alors même que cette notion de correction ne fait référence à aucune norme stabilisée. Cet article propose une réflexion sur les enjeux et modalités d’une prise en compte de la syntaxe et de la variation pour la production orale en maternelle, à partir de l’expérimentation de la ressource Parm (PArler Raconter en Maternelle).
Deep Strategy of Object Detection in Remote Sensing Images
Authors: Ahmad Sadique , El Affendi Mohamed A. , Alluhaidan Ala Saleh D. , Anwar M. Shahid
Published: July 2024

Recently, the demand for satellite image analysis increased with the recent advancement in various research areas (e.g., improvements in remote sensing image resolution, object recognition ideas, and deep learning techniques). Articles report new trends in object detection using remote sensing images, such as multi-temporal scene classifications, semantic segmentation, multiresolution, and large-scale optical image analysis. However, this study observed a black box of synchronization among the advancements in various technologies (i.e., new ideas in satellite image analysis) and advancements in deep learning techniques. Without investigating this black box, the optimization of object detection will be out of track. So, to keep the deep learning innovation on track, the primary goal of the current work is to explore the aforementioned black box to advance object detection in remote sensing images. In contrast, focusing on a specific technique, this study explores the black box while reviewing 150 articles from 2019 to 2023. First, the study highlights research methodologies and novel features of literature to achieve object detection in remote sensing images. Second, it evaluates effective deep learning models and assesses various featured studies to draw a clear picture of limitations and recent object detection trends to provide in-depth recommendations and future directions.
Beyond Traditional Security
Authors: Ochoa-Tataje Freddy , Alanya-Beltran Joel , Ruiz-Salazar Jenny , Paucar-Elera Juan , Mendez-Escobar Michel , Alvarez-Huertas Frank
Published: July 2024

With the emergence of 6G communication networks, it is becoming more and more clear that we need to prioritize strong resilience against evolving cyber threats. Conventional security measures, although they have their merits, are no longer adequate to protect the complex structure of 6G networks. Utilizing artificial intelligence (AI) in this context offers a revolutionary method to enhance communication resilience in the 6G era. The importance of AI in strengthening the resilience of 6G communication lies in its ability to analyze data and respond accordingly. With the help of machine learning algorithms, AI has the ability to identify patterns that may signal security breaches.
Binge Eating Behaviour Among Working Professionals in India
Authors: Sinha Bhagawan Chandra , Wadhwa Shilpa , Sivakumar P. , Sharma Upasana , Laddhu Sushil
Published: July 2024

Binge eating, marked by consuming excessive amounts of food within a short timeframe, often coupled with a feeling of lack of restraint, is now a notable health issue among working professionals in India. This study aims to investigate the prevalence of binge eating behavior in this demographic and delve into the intricate relationship between emotional well-being and physical health. This study employs a mixed approach, integrating quantitative surveys with qualitative interviews to collect thorough insights into binge eating tendencies among employed individuals. By identifying the factors that contribute to binge eating, this study aims to inform the design of workplace wellness programs and mental health initiatives tailored to the unique needs of professionals in India. The study will contribute to the development of targeted interventions, preventive strategies, and workplace policies aimed at mitigating the negative consequences of binge eating thereby promoting a holistic approach to employee well-being, fostering healthier lifestyles, and improving overall productivity.
An Integrated Approach of Particle Swarm Optimization and Grey Relational Analysis in Multi-Response Optimization of Fused Deposition Modeling
Authors: Abas Muhammad , Khan Imran , Jan Ziaullah
Published: July 2024

This study proposes an integrated approach combining grey relational analysis (GRA) and particle swarm optimization (PSO) to optimize process parameters for fused deposition modeling (FDM) 3D printing using polylactic acid (PLA) material. Experimental design based on definitive screening designs (DSD) is employed to identify optimal printing parameters, focusing on improving surface finish, dimensional accuracy, and impact strength. A regression model, generated based on DSD, accurately predicts grey relational grades (GRG), facilitating efficient optimization. The model's effectiveness is validated through evaluation metrics and close agreement between actual and predicted GRG values. PSO further refines the optimization process by efficiently navigating the solution space towards superior printing parameters. A comparison between GRA and PSO reveals refinements in printing speed, indicating the more refined solutions by PSO. These findings highlight the effectiveness of the integrated approach in enhancing additive manufacturing performance.
Metaheuristic Techniques-Based Optimizing Laser Welding Parameters for Copper-Aluminum Alloys
Authors: Tirlangi Satyanarayana , Senthil T. S. , John Leon S. , Parvathi Priya A. , Pradhan Raghuram , Maranan Ramya
Published: July 2024

In this research endeavor, the laser welding of C63000 alloy has been thoroughly examined, focusing on the interplay of key welding parameters—laser power, welding speed, and amplitude. The experimental design, structured as per the Taguchi L9 array, provided a systematic approach to investigating these parameters' effects on critical mechanical properties, specifically tensile strength and Brinell hardness. The alloy's responses were meticulously studied under varied conditions, capturing the nuances of its behavior in response to changes in laser welding inputs. The experimental outcomes revealed distinct trends in tensile strength and Brinell hardness in relation to the variations in welding parameters. Notably, the highest levels of tensile strength and hardness were consistently observed under specific combinations of welding speed, laser power, and amplitude.
Optimizing Shot Peening Machines for Compact Components
Authors: V. Gopal , R. Bharanidaran , T. Mothilal , M. Vignesh Kumar
Published: July 2024

Optimizing shot peening is a cold-working process employed to generate a compressive residual stress layer and modify the mechanical properties of metals. It involves impacting a surface with a shot with sufficient force to induce plastic deformation. Peening a surface spread it plastically, leading to alterations in its mechanical properties. Its primary application is to prevent the propagation of microcracks from the surface. Such cracks do not propagate in a material that is under compressive stress. Optimizing shot peening can induce such stress on the surface. In this process, shots are accelerated using centrifugal force generated by a rotating impeller, which directs the shots to impact the surface to be peened. Media choices include spherical cast steel shots, ceramic beads, or conditioned cut wire. Peening necessitates well-graded shots with consistent hardness, diameter, and shape, and a mechanism for removing optimized shot fragments throughout the process is desirable.
A Comparative Analysis of Meta-Heuristic Algorithms for Optimal Configuration of Hybrid Renewable Energy Systems for Remote Villages
Authors: Saravanan S. , G. Drakshaveni , Ramya G. , Hariprasad N. , Gomathy S. , Maranan Ramya
Published: July 2024

In the search for sustainable and reliable energy solutions, the deployment of hybrid renewable energy systems (HRES) has developed as a promising approach mainly for powering remote villages that lack access to centralized grids. The optimal configuration of these systems leads to a complex optimization problem through demanding the application of meta-heuristic algorithms to efficiently direct the massive solution space and recognize the most cost-effective and reliable setup. Numerous meta-heuristic algorithms have been engaged for this purpose. Through a comparative analysis of various meta-heuristic algorithms, particle swarm optimization helps in obtaining improved solutions. Particle swarm optimization (PSO) occurs as a powerful and effective optimization technique in addressing the complex task of determining optimal configurations for hybrid renewable energy systems positioned in remote villages.
Enhancing Operational Cost Savings in Electric Utilities on Global Optimization in Power System Planning and Operation
Authors: Rajkamal M. D. , Mohammed Ali H. , Krishnakumari A. , Saravanan M. , I. Manikandan , M. Ramya
Published: July 2024

Operational cost savings in electric utilities using the application of genetic algorithms in power system planning and operation characterize an innovative approach that involves computational intelligence to optimize complex decision-making processes in power grid functioning. Electric utilities involve various challenges which involve managing power generation, transmission and distribution that are necessary to meet the ever-growing demand for electricity with the reduction in operational costs. These challenges are overcome using the aid of a genetic algorithm. In the field of power system planning, the genetic algorithms are engaged to optimize the configuration and expansion of generation, transmission and distribution.
Quantum Computing for Real-Time Decision Making in Supply Chain Operations
Authors: Ghosh Debosree
Published: July 2024

This chapter examines the relationship between supply chain management and quantum computing, with a particular emphasis on real-time decision-making in supply chain operations. Quantum computing offers a solution to traditional supply chain decision-making by enabling faster computations at unprecedented speeds. This technology can improve inventory management, transportation routing, and demand forecasting. However, it faces challenges in real-time decision-making due to compatibility with current technologies and hardware limitations. The chapter explores the fundamentals of quantum computing and its potential applications in supply chain management, highlighting real-time decision-making-friendly quantum algorithms and quantum-inspired optimization strategies. Despite these challenges, quantum computing offers revolutionary possibilities for enhancing supply chain flexibility and effectiveness.
Unlocking the Quantum Advantage
Authors: Eswaran Ushaa , Eswaran Vivek , Murali Keerthna , Eswaran Vishal , Kannan E.
Published: July 2024

This chapter aims to delve into the practical applications and case studies of leveraging quantum computing for supply chain optimization. By exploring real-world examples and case studies, the chapter will illustrate how quantum computing technologies can revolutionize traditional supply chain management strategies. It will provide insights into how quantum algorithms can enhance optimization engines, improve logistics planning, and optimize resource allocation within supply chains. Through a combination of theoretical discussions and practical examples, this chapter will offer a comprehensive understanding of the transformative potential of quantum computing in supply chain optimization.
Introduction to Blockchain Technology for Securing Healthcare
Authors: K. Murugeswari , G. Ganesan , Ga Sakthi Kishore
Published: July 2024

Blockchain technology offers a safe and decentralized network for protecting medical records, tackling issues like confidentiality and data accuracy. With the healthcare sector's growing dependence on digital data, the handling and sharing of patient data could be revolutionized by blockchain technology. It functions as a distributed ledger across a computer network, dispersing patient data among nodes instead of storing it centrally. Strong protection against manipulation and unauthorized access is provided by the immutable chain that is created when each data block is cryptographically connected to the one before it.
Students' Intention to Engage With ChatGPT and Artificial Intelligence in Higher Education Business Studies Programmes
Authors: Benuyenah Vic , Dewnarain Senika
Published: July 2024

This initial qualitative study used in-depth interview data from students to examine their perceptions of ChatGPT and intentions regarding using artificial intelligence (AI) in higher education. The students were sampled across business programmes at both the undergraduate and postgraduate levels at an International University in the UAE. As of mid-2023, understanding student attitudes becomes crucial as AI increasingly becomes integrated into educational settings, therefore necessitating initial research. Additionally, the ethical dimension of ChatGPT use in assessment and future impact on careers was explored, considering concerns related to privacy, data security, bias, and transparency. Whilst all participants reported that they were familiar with the chatbot, a proportion of them indicated that the tool could help them improve their assignments, particularly in improving grammar. Some participants expressed concerns about the algorithm behind ChatGPT as well as the potential displacement of the labour force.
Factors Affecting Consumer Intention to Use E-Grocery Shopping in Saudi Arabia
Authors: Alsulaimani Moroj M.
Published: July 2024

Saudi Arabia owns the 29th largest E-commerce market in the world, however, grocery is considered the smallest Saudi E-commerce market based on its revenue. This study aims to investigate the effects of various factors on consumers' intention to use E-grocery shopping in Saudi Arabia. Primary data were collected through a self-completion questionnaire that was completed by 189 participants from across Saudi Arabia. The data was analysed using Partial Least Squares Structural Equation Modelling. The results indicate that perceived benefits have significant positive effect on the intention to use E-grocery shopping. On the other hand, none of the examined perceived risk variants (e.g. time risk, financial risk, product performance risk, social risk, and delivery risk) nor the social norm factor had significant effect on intention to use. Finally, theoretical and practical implications were provided as well as limitations and future research direction.
Management Innovation, Digital Orientation, and External Knowledge Search
Authors: Tsai Fu-Sheng , Li Ruida , Escobar Octavio
Published: July 2024

We investigate how digital management innovation influences external knowledge search so as to survive the digital environment. Through 201 firms that apply big data technology in China, we find that management innovation positively contributes to both science-oriented and market-oriented external knowledge search. Specifically, digital orientation accentuates the positive relationship between management innovation and both external knowledge searches. The theoretical contribution extends the related research of knowledge management theory, integrating the institutional perspective and rational perspective of management innovation for explaining how an organization establishes new standardized and institutional routines with digital tools, ensuring efficient external knowledge search. Practical contributions indicate that firms should attach importance to management innovation for establishing governance systems that are beneficial to searching outside knowledge and keeping competitive advantage.
POEMAR A PRÓPRIA VIDA
Authors: Pereira Rafael Calado Alves , Monteiro Jesus Alexandre
Published: July 2024

A proposta deste texto é realizar um debate sobre identidade, cultura e resistência, a partir da prática pedagógica do duelo de poesia marginal Slam. Objetiva, também, analisar o Slam como um elo entre a escola e os diversos sujeitos, uma prática educativa que dialoga com a realidade dos estudantes, realizando um processo de “reexistência”, em que esses discentes reafirmam sua cultura e recriam o espaço escolar a partir de sua própria identidade cultural. Para tal, metodologicamente, optamos por construir uma revisão bibliográfica centrada nos temas resistência, identidade, cultura e educação, dialogando com a teoria de Lev Vigotski e bell hoocks, procurando apresentar outra percepção sobre a interação entre escola, prática educativa e o sujeito aluno, em conjunto com uma pesquisa baseada no acompanhamento da prática dos educandos nos encontros de Slamer.
TREINAMENTO DE HABILIDADES DE COMUNICAÇÃO BASEADO EM NEUROCIÊNCIA
Authors: Coden Mirian Machado , Paixão Jairo Antônio da
Published: July 2024

Este estudo teve como objetivo analisar a percepção dos gestores de educação básica da rede pública, com relação aos elementos de comunicação - postura do corpo e emoções -, após a realização de uma formação customizada com base em neurociências e orientada ao desenvolvimento de capacidades comunicacionais. O estudo possui uma abordagem quantitativa, de caráter descritivo, realizado por meio de uma pesquisa-ação, viabilizada através de um curso de formação a 87 gestores das escolas públicas de educação básica, da cidade de Indaiatuba, interior do estado de São Paulo, Brasil. Aplicou-se uma formação customizada com elementos de neurociências e orientada para o desenvolvimento de capacidades comunicacionais, durante 38 horas, distribuídas em cinco encontros coletivos, quatro encontros individuais de tutorias, realização das atividades das aulas e preenchimento de questionários e formulários de auto acompanhamento do gestor. Os resultados mostraram que os gestores perceberam um aprimoramento nos elementos de comunicação da postura do corpo e emoções, após a intervenção da formação (p < 0,05). A formação capacitou os gestores para lidarem de forma mais efetiva com a comunidade escolar, pois aprenderam a ficar atentos diante das suas emoções e postura do corpo, conseguindo, como resultado, gerir seu estado emocional e melhorar suas interações.
MOSTEIRO DE ALCOBAÇA
Authors: Sousa Cleusa Teixeira , Fagundes Maria Dailza da Conceição , Noronha Gilberto Cézar de
Published: July 2024

Este Mosteiro se tornou protagonista na criação de representações que contribuíram para a consolidação de um tipo de memória oficial[1]. Sua criação foi idealizada por D. Afonso Henriques (1143-1185), e ganhou notoriedade por se tratar de uma forma de povoar e arrotear as terras conquistadas aos mulçumanos. Corroborou para o surgimento de uma nova história em torno da monarquia portuguesa, garantindo-lhe uma iconografia original, uma literatura épica - romance entre Pedro e Inês de Castro - e representou o desenvolvimento da agricultura materializada pela experiência e trabalho dos monges cistercienses. Adornado pela flora, se solidificou em terras férteis se tornando um modelo de empreendimento agrário medieval. Seu cenário de memórias petrificadas[2] garantiu-lhe a classificação de Monumento Nacional Português (1910) e Patrimônio da Humanidade (1989), o tornando uma referência entre os lugares de memória deste país.
 
[1]Em contradição a um passado definitivamente morto, encontramos o termo consolidado por Pierre Nora, o qual enfatiza que a história memória consegue arrancar do passado o que ainda lhe resta do que foi vivido na tradição, na repetição dos ancestrais, sob o signo de um sentimento histórico profundo. Deste modo, os lugares de memória estão diretamente associados à nossa história (NORA, 1993, p. 07-08).       
[2] A evocação das memórias se faz presente em diversos lugares, como em Igrejas, Cemitérios, Mosteiros, dentre outros, os quais se perfazem como espaços que contribuem para o resgate das memórias do nosso passado. Pois, por detrás dessas construções e composições de seus artefatos, há um arcabouço de significados e significantes que aguçam a curiosidade dos pesquisadores e dos estudantes que precisam ser observadas, estudadas, desmistificadas, apreendidas e ensinadas a partir de seu próprio lugar de memória na história. (SOUSA; NORONHA, 2021, p. 351).
APORTES DE LA ORDEN FRANCISCANA A LA EDUCACIÓN Y A LA CULTURA CHILENAS
Authors: Caiceo Escudero Jaime
Published: July 2024

A Ordem Franciscana surgiu no século XIII para viver e pregar o Evangelho de Jesus Cristo, que não estava sendo posto em prática dentro da Igreja. Uma boa pregação para ter um efeito ao longo do tempo requer uma educação para as gerações futuras, de acordo com a mensagem e tanto a pregação quanto a ação pedagógica, levarão a uma mudança cultural na sociedade. Isso foi trazido à prática pelos Frades Menores, que chegaram ao Chile em 1553, cuja preocupação era focada nos setores indígenas e mais despossuídos nos campos chilenos, insistindo na justiça. A relevância especial adquire tendo assumido as escolas e paróquias deixadas pelos jesuítas quando foram expulsos dos territórios espanhóis em 1767. A metodologia utilizada para a realização deste estudo faz parte do paradigma qualitativo no qual fontes históricas são utilizadas para descrever e analisar adequadamente o objetivo da pesquisa.
A CONSTRUÇÃO DA ESCOLA NACIONAL FLORESTAN FERNANDES E A FORMAÇÃO POLÍTICO-IDEOLÓGICA DOS TRABALHADORES RURAIS
Authors: Peixinho Aline de Jesus , Borges Netto Mario
Published: July 2024

Tomamos como objeto a Escola Nacional Florestan Fernandes (ENFF) enquanto lócus de formação político-ideológica dos trabalhadores rurais organizados no Movimento dos Trabalhadores Rurais Sem Terra (MST). A ENFF é uma resposta do MST às suas necessidades educacionais e formativas, enquanto classe. Partimos do objetivo de analisar o processo de criação da ENFF, suas motivações e suas finalidades. Este texto se orienta pelo questionamento: quais as determinações históricas que motivaram o MST a criar uma escola de formação político-ideológica? Fizemos uso de uma pesquisa documental, cujas fontes foram os documentos elaborados pelo MST sobre a educação e a escola, a saber, Caderno n°8 “Princípios da educação no MST” e Caderno n° 29 “Campanha de construção da escola nacional do MST”. Nossa pesquisa nos permitiu concluir que o MST, historicamente, assumiu as características políticas e formativas de partido político, na concepção gramsciana, quais sejam, organizar, dirigir e educar seus militantes segundo visão de mundo própria adequada às suas finalidades políticas. A ENFF, portanto, pode ser considerada a materialização dos empenhos educacionais do MST e a prova de que o Movimento se constitui um Partido da classe trabalhadora ao oferecer uma formação político-ideológica para os trabalhadores rurais que se organizam em torno de si.
DIÁLOGOS MEDIEVALES
Authors: González Marrero José Antonio
Published: July 2024

Pretendemos en este trabajo profundizar en enfoques y planteamientos de la Eneida y la Nauigatio Sancti Brendani con el fin de mostrar cómo la primera pudo haber servido de modelo para la composición de la segunda en el siglo IX. No hay una copia literal de pasajes, pero sí afinidad de temas que sugieren que el texto de Virgilio fue consultado por el anónimo brendaniano. Aunque los objetivos de cada uno sean diferentes, la evolución de los motivos propios de las narraciones de viajes permite reconocer contextos compartidos. El calificativo “pius”, que la tradición confiere a Eneas se aplica también a Brendano, puesto que los dos héroes simbolizan el carácter íntegro, virtuoso, puro y honesto. A través de esta idea llegamos a un análisis mucho más amplio de intereses comunes, que describen no solo un simple reflejo literario o religioso, sino la búsqueda de la construcción de identidades de dos pueblos.
EL ARGUMENTO ONTOLÓGICO DE ANSELMO
Authors: Reinoso Fonseca Nelson Ramiro , Chávez Báez Román Alejandro
Published: July 2024

Uno de los pensadores que, de manera muy paradigmática, ha dado continuidad al clásico argumento ontológico de Anselmo de Canterbury, dentro de la contemporánea reflexión hermenéutico-fenomenológica, es el filósofo español Eugenio Trías. A través de su principal obra: La Edad del Espíritu, publicada en 1989, dedicada a la investigación del símbolo religioso en relación con lo sagrado, Trías entabla un particular diálogo con el Arzobispo de Canterbury a través de su singular interpretación que hace respecto al argumento ontológico. En este artículo, precisamente, se analizará cómo este argumento anselmiano cobrará una especial subsistencia dentro de la mística liminal que propone Trías. Concretamente, se mostrará, primero, que el rango ontológico de Anselmo apunta a un nivel ontoteológico para Trías; segundo, que su resignificación está allende al plano filosófico (tradicional) y, por último, que la insistencia del argumento ontológico de Anselmo, dentro del marco filosófico del pensador contemporáneo, sugiere algunas implicaciones difíciles de esquivar. Aun así, para la investigación filosófica actual, quedará claro cómo el sentido filosófico de pensadores como Anselmo de Canterbury, cobra una indiscutible significación y relevancia dentro la investigación actual de la mística y lo sagrado como, en este caso, lo propone Eugenio Trías, el filósofo de la liminalidad.
Resiliência e Estratégia: Uma Jornada Reflexiva Pela Publicação em Pesquisa de Marketing
Authors: Limongi Ricardo
Published: July 2024

Esta pensata navega pelos desafios da pesquisa em marketing, destacando a complexidade da escolha adequada de periódicos e a arte de comunicar efetivamente com os revisores. Explora ainda as implicações da rejeição e a importância de adaptar metodologias e teorias em resposta ao feedback, e ainda, contribui com insights para aprimorar práticas de submissão e publicação, encorajando uma abordagem reflexiva e estratégica na produção acadêmica. A pensata propõe que enfrentar as adversidades e críticas é essencial para o avanço científico, incentivando a resiliência acadêmica e a persistência na busca pela excelência e relevância no campo dinâmico do marketing.
Correlation between Crystallite Characteristics and the Properties of Copper Thin Film Deposited by Magnetron Sputtering: Bias Voltage Effect
Authors: Tadjine Rabah , Alim Mohamed Mounis , Naitbouda Abdelyamine
Published: July 2024

This work investigates the properties of copper thin films deposited by magnetron sputtering. The substrate is biased by a negative voltage (Vs), which controls the energy ions bombardment during the deposition of the thin films. In order to focus solely on the ions energy contribution, the power supply was fixed and the working pressure was selected at 5 Pa. This ensures energetic sputtered particles completely thermalized, by a sufficient number of collisions with the Argon gas. X-ray diffraction analysis revealed that substrate voltage Vs affects essentially the structure and size of the formed crystallites. The preferred orientation (111) and the larger crystallite size (30 nm) were achieved at Vs = - 60 V. The Cu (111)/(200) peak intensity ratio is maximal (12.55) at - 60 V, corresponding to the lowest resistivity value (6.33 mW.cm). Optimum corrosion resistance of the deposited thin film was achieved at -60 V. At high crystallite sizes, nanoindentation analysis showed a thin film that is more elastic (133 GPa) and less hard (1.96 GPa).
Development of Hydrophilic Self-Cleaning and Ultraviolet-Shielding Coatings Incorporating Micro-Titanium Dioxide/Nano-Calcium Carbonate (µ-TiO2)/(Nano-CaCO3)
Authors: Syafiq Amirul , Awalin Jamilatul Awalin , Ali Mohd Syukri , Mohd Sarjidan Mohd Arif , Rahim Nasrudin Abd , Panday Adarsh Kumar
Published: July 2024

The dust accumulation and dirt particles always degrade the transparency of glass, later hampers its various applications such as photovoltaic panels, building glass, and car-windshield. In this study, the hydrophilic self-cleaning coatings have been developed by using the nanocalcium Carbonate particles (nanoCaCO3) and hydrophilic micro-titanium dioxide particles (µ-TiO2). The presence of oxide groups, CO-3 and TiO2- forms a strong attraction of glass to polar water molecules. At the weight ratio of 1: 1 in the CaCO3 to TiO2 mixture, it forms a great hydrophilic property in which the water contact angle (WCA) of coated glass has been recorded as low as 11.46 ±0.85°. The coated glass also showed high transparency in UV and Visible regions. The optical transmission of coated glass was above 89% at the wavelength of 300-400nm and above 97% at the wavelength of 400-800nm. Due to its hydrophilic property, the coated glass is capable of removing the dust particles away via the water stream. The hydrophilic coating spontaneously forms the water-thin film after contact with coated glass without the presence of UV light.
Prediction of High-Entropy Alloy Phases Using Soft Computing Techniques
Authors: Akinwekomi Akeem Damilola
Published: July 2024

High-entropy alloys (HEAs) have excellent properties that are being explored for potential applications in many engineering fields. Their excellent properties strongly depend on their phases. The vastness of alloy compositions that can be synthesized makes it extremely challenging to experimentally investigate all the possible HEA types. To mitigate these challenges, more efficient and systematic computational techniques can be applied to the existing experimental data to accelerate HEA design and discovery. Therefore, this study developed three soft computing classification models based on artificial neural network, k-nearest neighbor (kNN), and support vector machine (SVM) to classify solid solution, amorphous and intermetallic phases in HEAs. Empirical studies showed that hyperparameter optimization improved classification accuracies of the classifiers with kNN (92%) outperforming ANN (86%) and SVM (90%) using all five predictive features. Feature selection did not improve the classification accuracy of any of the model. This studied demonstrated the importance of applying soft computing techniques and hyperparameter optimization for enhancing the classification accuracies of models to predict the phases in HEAs.
Rice Husk Ash Filled with Hydroxyapatite Based Composite for Biomedical Application
Authors: Adamu Muhammad A. , Ameh Emmanuel O. , Kazeem Salami A. , Abdullahi Mohammed , Hassan Uman
Published: July 2024

Despite several advantages of hydroxyapatite, the main shortcoming is its low mechanical properties. The aim of the research study is the production and characterization of Rice Husk Ash reinforced hydroxyapatite ceramic composite for bone repair. The effect of Rice Husk Ash content and sintering temperature on the wear rate, physical and mechanical properties of the fabricated composite was investigated. The porosities obtained for the samples range from 39±0.1 to 56.53±0.14%. The porosity obtained in this study falls within the range of 40 and 90% which makes it suitable for osteo-integration. The trend from the mechanical properties shows that the addition of the rice husk ash significantly improves the measurement since it serves as a barrier to the propagation of cracks and consequently serves as an additional toughening mechanism. The wear rates obtained for the samples are 0.036, 0006, 0.0016, 0.009 for 0, 0.5, 1, and 1.5 wt.%RHA respectively. This shows that the wear rate of the samples reduces drastically with the addition of the rice husk.
Enhancement of Concrete Properties Using Sawdust Ash and Superplasticizer
Authors: Ikumapayi Catherine Mayowa , Ajayi Joseph Adeniyi , Fasuba Akintunde
Published: July 2024

Concrete is a construction material that is widely embraced worldwide with a major disadvantage of environmental unfriendliness arising from the production process of cement, one of its vital components. Recent studies have found that replacing cement with pozzolans increases compressive strength, durability, and occasionally workability, although at a low replacement percentage. The low replacement level obtained can be improved upon with the use of superplasticizer to further enhance the workability and the compressive strength. Therefore, the primary objective of this study is to determine the effects of adding Costamix 200 superplasticizer and partially replacing cement with sawdust ash (SDA) for cement on the mechanical properties of the resultant concrete. Waste sawdust was collected, dried, and then burnt in a furnace for 60 minutes at 700°C. Concrete samples were made using 150 x 150 x 150 mm3 rectangular and 100mm cylindrical molds using a 1:2:4 mix ratio, 0.55 water cement ratio, a constant dosage of 1.8% superplasticizer (Costamix 200), and SDA at 0%, 5%, 10%, 15%, 20%, and 30% SDA respectively. The concrete samples were tested at 7, 14, 21, and 28 days for bulk density, split tensile strength, and compressive strength were carried out. The outcomes of the research show that the presence of costamix 200 and SDA at 0%, 5%, 10%, 15%, and 20% cement substitution resulted in compressive strength range of 18.91 N/mm2 to 25.00 N/mm2 at 28 days. The optimum value of 25.00 N/mm2 was recorded for 15% replacement making it ideal for use in structural applications such as beams, slab and column.
Efficiency of Carica papaya Seeds in the Coagulation of Moderately Turbid Wastewater
Authors: Ojo Ochuko Mary
Published: July 2024

The continuous degradation of available water resources coupled with the high cost of conventional water treatment has led to alternative, sustainable and cost-effective methods of treating wastewater. This study investigated the efficiency of Carica papaya seeds in the coagulation of moderately turbid water while determining the optimum treatment dosage and evaluating the treatment efficiencies compared to the use of conventional Aluminum sulphate (alum). Moderately turbid wastewater was obtained from Ala River tributary in Akure, Ondo State, Nigeria. The coagulation experiments were carried out at room temperature in a jar test. The experiments were carried out using 0.2 g/L, 0.4 g/L, 0.6 g/L. 0.8 g/L, 1.0 g/L, 1.2 g/L and 1.4 g/L doses of Carica papaya seed powder. An alum dose of 1 g/L was used as a control dose. The pH, turbidity, total hardness, total dissolved solids (TDS), and biochemical oxygen demand (BOD) of the raw water and treated water samples were analyzed. The pH of the raw water sample was 7.8; after treatment, the pH ranged from 7.7 at 0.2 g/L to 8.0 at 1.0 g/L treatment dose with Carica papaya seed powder. The optimum dose for turbidity removal was found to be 0.8 mg/L which amounted to 74.5% turbidity removal efficiency compared to 93.1% for alum. The hardness of the raw wastewater sample was 102 mg/L. After treatment, the hardness reduced from 99.4 mg/L at 0.2 g/L treatment to 77.6 mg/L at an optimum dose of 0.8 g/L. The TDS reduced from 564 mg/L at 0.2 g/L treatment with Carica papaya seed powder to 388 mg/L at an optimum dose of 0.8 mg/L amounting to a 78.9 % contaminant removal. The percentage BOD removal at 0.8 g/L of Carica papaya treatment was 86.3% while at 1.0 g/l, it was 100%. This study demonstrated that Carica papaya seeds is useful for the removal of contaminants from moderately turbid wastewater at varying percentages under different doses of papaya seeds.
Evaluation of Nigerian Transmission Grid Capacity and Technical Limitations under Different Load Conditions
Authors: Aremu Sameul Olanrewaju , Melodi Adegoke Oladipo , Adu Michael Rotimi
Published: July 2024

This paper presents performance-based study of the Nigerian Transmission Grid (NTG), having about 27 power stations, 50 transmission (330/132kV) stations and 150 bulk load centers (132/33kV). Power stations and transmission grid are designed to operate at a level close to installed capacities, to achieve high efficiency. However, due to some technical limitations and maintenance factors, not all the elements may be available at all operating times. Therefore, the available generations may not equal the installed capacity; also, the load demand (consumed) on the grid may not equal the installed transmission capacities. This study evaluates the capacity of the transmission grid considering the installed and available generation capacity and three components of transmission load: actual load demand (LD), transmission wheeling capacity (TWC) and transmission load capacity (TLC). Obtained system data were used to create virtual simulator for the transmission grid, using Power System Analysis software (NEPLAN), which uses Newton Raphson Algorithm. The results established that the power generation on the grid must be maintained at the level of installed capacity to deliver the TWC and TLC load component to mitigate the practice of rotational power transmission and distributions currently being adopted in electricity transmission and distribution in Nigeria. It was established that the transmission capacity of the current transmission network is capable of accommodating and delivering power more than the current installed generation capacity. It is recommended that efforts be geared towards improving the generation capability of the grid for efficient power transmission and distribution.
Keywords: grid capacity, transmission grid, load, system collapse, voltage stability
Comparative Analysis of the Performance of ANFO and Ammonium Nitrate using Fragment Size Distribution during Blasting Operations
Authors: Ayinde Babatunde Kazeem , Oniyide Gafar Omotayo , Adeyemi Adedapo Jacob
Published: July 2024

This research was carried out to compare the performance of ANFO and Ammonium Nitrate on fragment size distribution by using the ANFO and AN as the column charge in blasting operations, measuring the fragmentation size after each blasting operation, characterizing the fumes evolving from the blasting operation in each case and compare the performance of the ANFO and AN. The densities of the rock deposit were derived as 2.638 g/m3 and 2.622 g/m3 for Block A and Block B respectively. The rebound hardness tests ranged from 47 to 61 for Block A and Block B from 48 to 54. The total explosive charge used for each of the blocks was 0.1 kg. The muckpile magnification ratio for Block A was 0.008 and Block B was 0.004. The fragmentation sizes for Block A range from 1.869 cm to 19.411 cm and Block B from 2.414 cm to 37.177 cm. The magnification ratio and fragment sizes show that Block A has better fragmentation than Block B. Ammonia gas was not present in the area of study before blasting but the fume emitted after first blasting with ANFO produced 0.08% of Ammonia gas and after the second blasting with AN 0.07% were produced. The oxygen level was reduced from 20.9% before blasting to 19.2% after the first blasting and 19.1% after the second blasting. It was deduced that blasting with ANFO generated more Ammonia gas than blasting with AN but the Oxygen level when ANFO is used was higher than when AN is used. Keywords: Blasting, density, explosive, fragmentation, magnification ratio
Stochastic Evaluation of Load Power System of Lines in Sub-Saharan Africa under Condition of Stability
Authors: Ogunboyo Patrick Taiwo , Ogunlade Omojola
Published: July 2024

To allow for optimum operation of the secondary system of lines, it is essential that the performance of the system be evaluated. Optimal functioning refers to the most desirable and favorable system of operation such as: improved system reliability, adequate and satisfactory electric potential profile, no imbalances in the phases of electric potential and electric charge, complete absence of overloading of electrical conductor used and energy converting devices and approved and allowable loss. This investigative research assesses the efficiency of the distribution system of lines resulting from electric potential deviation, electric potential imbalances, electric potential losses and electric potential fluctuation through the use of MATLAB/Powerlib tools. This research offers most desirable and favourable assessment of Typical, Sub-Saharan Africa secondary unbalanced system of lines. The system of lines was designed with approved and accepted system of line parameters for secondary Sub-Saharan Africa typical system of lines through the use of MATLAB/Powerlib software. The desire outcome got from the MATLAB model with the 500 meters distance for unbalanced system of lines is within permitted actual electric potential limit of minus five per cent for electric potential loss, plus and minus five per cent for electric potential deviation, electric potential imbalances is less than 2 per cent, and the electric potential profile at the end users is within 0.95 and 1.05 per-unit.
Design of a Ceiling Fan with Autonomous Capability
Authors: Adeyeri Michael Kanisuru , Ademeso Ojo Victor , Nwoko Abel Bayowa
Published: July 2024

The unkempt state of many ceiling fans in offices, homes and industries due to poor maintenance in term of cleaning and the wastage of energy as a result of carelessness in appliance usage inform the design of a ceiling fan with autonomous capability. The design of the ceiling fan was done using appropriate design equations and Solidworks CAD software. Different concepts were conceived and the best concept was determined using one of the Multi – Criteria decision Tools named Pugh Matrix Method. After which, simulation was done using ANSYS and Proteus 8.1 design suite to test functionality of the design. The outcome shows that at no load in the room, the ceiling fan switches off automatically and also when occupants are in the room with an increase in temperature above ambient temperature (25 °C), the ceiling fan switches on. The simulation results analysis of stress, strain, shear force, deflection, factor of safety and bending moment on the embedded cleaner gave 112.717 MPa, 0.007496, 5 N, 60.28 mm, 1.8346 and 0.8965 Nm respectively. Furthermore, the result revealed that the autonomous capability of the cleaning mechanism gave an efficiency of 85%. The cost to implement this innovation is estimated at twenty five dollar.
Investigating Characteristics of Solar Panels as Visible Light Communication (VLC) Receivers
Authors: Ponnle Akinlolu Adediran , Ojediran Oluwabukola Arike , Akin-Ponnle Ajibike , Oyetunji Samuel Adenle
Published: July 2024

Visible light communication has advantages over acoustic and radio wave transmissions in free-space and underwater. The optical transmitters are usually light emitting diodes or laser diodes, and the optical receivers are usually photodiodes or its variants. Solar panels are used for solar energy harvesting to electricity, but the panels are also available in small sizes, and hence, are finding increasing use in optical communications due to larger aperture compared to photodiodes. This work investigated by experiments the characteristics of solar panels as receivers in visible light communication (VLC). In the work, four solar panels of different physical sizes were selected for experiments and measurement. Two characteristics important to communication were investigated. First is the internal resistance at different low illumination levels of white light. Second is response to sinusoidally varying intensity of white light at varying frequencies. For the first study, two of the four panels were investigated; and for the second study, the four solar panels were investigated. An array of seven white LEDs was used as the light source. Also, underwater data communication in saline water was performed for one of the solar panels, and a photodiode in comparison. Results showed that under steady illumination, the internal resistance is both illumination level-dependent and surface area-dependent. It decreases with increase in illumination level, and surface area. Also, the rate of decrease of the internal resistance with illumination increases with surface area. For the frequency response, the cut-off frequency of the solar panel is surface area-dependent, and load-dependent. It decreases with increase in surface area, and increases with decrease in load resistance values (increased loading). For data communication, the maximum data rate obtainable with the solar panel is less to that of the photodiode. The frequency response is important in considering the bandwidth of the solar panels, which also varies with the load, while the internal resistance is important in maximum power point tracking and impedance matching with front end circuits in optical communication receivers.