PriMera Scientific Engineering (ISSN: 2834-2550) - Article In Press

Decentralized Finance (DeFi) has once again been in the news for the wrong reasons. Is it time for unsophisticated investors to be proscribed from accessing?

Even before President Trump chinked his first alcohol-free glass in celebration, the DeFi industry was looking forward to a welcome reset after Gary Gensler’s capricious SEC. Many giants of the new economy attended his inauguration. A new era of optimism was palpable.

Nevertheless clouds of concern were not far away. The double launch of the President’s and First Lady’s memecoins, hit hard by two whales dumping at large on 25 February 2025, shows the continuing volatility of memecoins, where intrinsic value is difficult, if not impossible, to discover.

OxTube, a new water treatment innovation clarifies water matrices in tube condition with nature respect within seconds. It can be integrated in ships and other watercrafts. The seas suffer low oxygen, algae, toxins and micro plastics. A cargo ship can clarify sea water 288 000 m³ a day in depth of 4 to 5 meter when cruising without additional fuel consumption.
OxTube generates huge amount of air bubbles along with water clarification. Mixture of air bubbles and water is coherent and viscosity up to ten times lower than water. It can be led under the cruising ship in order to reduce flow resistance and fuel consumption. All kinds of combined processing is economically and environmentally beneficial. According to MIT Group combined energy and water system could provide for millions.
Keywords: Water Clarification; Water Treatment; Sea Water Refreshing; Water Oxygenation; Flow Resistance Reduction; Fuel Saving

Excess moisture accumulation in residential bathrooms significantly impacts indoor air quality (IAQ) and occupant comfort, especially in tropical climates like Dhaka, where high humidity levels from activities such as showering and bathing are common. Inadequate ventilation exacerbates moisture buildup, leading to condensation, microbial growth, and structural damage. This research aims to assess moisture generation and accumulation in residential bathrooms, evaluate ventilation strategies, and propose architectural guidelines to address moisture-related issues. The study was conducted in two bathrooms in Dhaka's Wari area, characterized by hot, humid, and rainy conditions typical of tropical climates. Environmental factors such as temperature, humidity, surface temperature, and moisture accumulation were measured in both the bathroom and adjacent changing room. Ten male participants bathed under various ventilation conditions (High, Low, and Off modes), with standardized bathing styles (showering and tub bathing) and door opening durations. The results revealed that relative humidity in the bathroom reached 100% during bathing, regardless of ventilation settings. Moisture accumulation on surfaces was higher in one bathroom, attributed to floor material differences. Effective ventilation removed a higher proportion of moisture in the bathroom with better airflow, demonstrating the critical role of ventilation and material selection in moisture control. The study highlights the importance of optimizing ventilation systems and architectural design to manage moisture accumulation, improve IAQ, and reduce the risk of mold and mildew growth in tropical residential bathrooms.
Keywords: Moisture accumulation; indoor air quality (IAQ); bathroom humidity; temperature; natural ventilation; condensation; mold growth

Dementia, a neuro-degenerative disorder affecting various cognitive functions, including speech and language, presents significant challenges in rehabilitation. This research paper introduces a comprehensive tele-neurorehabilitation system designed for speech therapy in dementia patients, leveraging cutting-edge technology. The system incorporates nine distinct activities, employing text comparison models. Users engage in interactive exercises, where their spoken words are transcribed to text, fostering language engagement and cognitive stimulation. This application explores the dynamic correlation between dementia and speech therapy, analyzing advancements, challenges, and therapeutic applications. The outcomes of our study aim to deepen comprehension of this intricate relationship, providing a foundation for more precise and impactful speech therapy interventions, ultimately contributing to improved rehabilitation for those affected by dementia.
Keywords: Dementia; Speech Therapy; Tele-Neurorehabilitation; Gamification; Automated Speech and Language Therapy; Text Comparison; Cognitive Stimulation; Interactive Experience

Solar cells play a major role in building up energy storage solutions throughout the world. There are advancements happening in the development of more efficient panels, more efficient designs and materials for more efficient light absorption etc. Development of cost efficient PVs have provided a path for the installation of solar PV installations at various sectors throughout the world.

To make real-time driving decisions such as adjusting lanes, avoiding obstacles, and collision prevention, autonomous vehicles (AVs) depend on precise trajectory prediction. Long Short-Term Memory (LSTM)[1] and Bidirectional LSTM (BiLSTM)[2], two conventional deep learning models, are frequently employed for trajectory forecasting. Variable temporal dependencies and dynamic spatial relationships are often not easy for these models to capture. The introduction of spatial and temporal attention processes has improved the accuracy, resilience, and adaptability of trajectory prediction [1].