Physical Sciences and Engineering

En el ámbito educativo, la voz del docente se erige como una herramienta multifacética y poderosa que va más allá de simplemente transmitir información. Este artículo explora el papel fundamental que desempeña la voz en la comunicación efectiva dentro del entorno educativo. Desde la claridad y la expresividad que facilitan la comprensión hasta la capacidad de mantener la atención y fomentar la participación activa de los estudiantes, la voz se convierte en un elemento crucial para el aprendizaje significativo.

With this study, we intend to contribute to the promotion of micro hydroelectric power plants for individual, family and community use. We pay a particular attention to sustainable and affordable solutions that could be used in isolated sites with relative less investment. For this purpose, we demonstrate the possibility of generating electricity from hydraulic energy of water flow in domestic taps and agriculture irrigation valves.

The assessment of resilience is the core of any governance and risk management analysis for shocks and crises. This assessment is generally dependent on similarity measurement for the identification of patterns and relationships between different individuals or groups of individuals within a given community. One of the difficulties in studying social resilience processes is the lack of appropriate analytical tools that take into account the dimensions of resilience.

Breast cancer ranks first among the types of cancer affecting women worldwide. However, early detection can lead to effective treatment. Developing a system to make the decision on the benign or malignant nature of the tumour will help radiologists to establish a precise diagnosis in order to manage patients presenting the pathologies. The objective of this study is to develop a method that makes it possible to recognize the malignant or benign nature of breast cancer in a mammographic image, using the neural network. The method we developed is based on the neural network.

Breast The main objective of this study was to show the effects of the practice of extra-curricular activities based on the game of "lipato" on the body composition and blood pressure values of high school students. It involved 64 subjects, aged between 19 and 22, divided into two groups: GE (32) experimental group and GT (32) control group, experimental protocol of the “lipato” game during 3 months of school holidays.

Background: Regular physical activity improves fitness, physical and cognitive function, and overall well-being, especially in older adults. Digital health applications, particularly those integrated with voice-activated assistants like Amazon Alexa, present new opportunities for promoting healthier lifestyles by facilitating access to health information and on-demand exercises. This study evaluates the impact of using the EngAGE Amazon Alexa Skill on weight loss and physical activity among older adults.

A new homologous series has been synthesized and studied to explore the impact of adding alkyl chains and a fused heterocyclic ring on mesomorphic properties. The series includes 12 homologues (G1-G12), all of which exhibit smectic mesophase. Textural analysis and phase transition temperatures were measured using polarizing optical microscopy with a heating stage. The molecular structures were confirmed using 1H NMR, FTIR, and mass spectrometry.

Operating temperature is a critical factor affecting the performance of photovoltaic (PV) modules. In this study, we present models designed to predict the operating temperature of PV modules using ambient temperature and solar irradiance data collected from real measurements in a tropical region. Weather conditions were categorised based on irradiance and temperature levels, and the predicted PV module temperatures obtained from our models were compared with corresponding experimentally measured values.

Hair Palmo-plantar hyperkeratosis is characterized by abnormal thickening and roughness of the skin on the palms and soles, often resulting from increased keratin production. This condition can be triggered by various factors, including vitamin A deficiency and chronic exposure to toxins such as arsenic. A 63-year-old male patient with a history of diabetes, hypertension, and schizophrenia developed eczema on his palms and soles, which progressively worsened post-vaccination.

In the present study, both the GaN buffer layer approach and the sapphire SiN treatment method were used to develop GaN films by metalorganic chemical vapor deposition (MOCVD) on a c-plane (0001) sapphire substrate. The growth was controlled in situ by 632.8 nm laser reflectometry. The GaN-grown layer structure wasinvestigated via high-resolution X-ray diffraction (HRXRD). TheGaN structural properties improved upon SiN treatment.