The article deals with the evaluation of the influence of the material properties of electrical sheets on the quality of the shearing edge. Electrical sheets are used mainly in the electrical industry due to their magnetic properties. Due to their sensitive magnetic properties, the quality of processing of these materials plays a fundamental role in achieving high performance and low energy losses. One of the decisive technological processes of their processing is shearing, during which a shearing edge with certain geometric and qualitative characteristics is created. The aim of this article is to analyze the influence of the material properties of electrical sheets on the quality of shearing at different punch-die gap sizes. The cutting surfaces cut with a punch-die gap of 1% and 10% of the thickness of the cut material were investigated.

KEYWORDS; electrical sheets, shearing, punch-die gap, shearing edge

The article deals with the evaluation of the influence of the shear gap size on the tear-off angle size when shearing electrical sheets. Electrical sheets, thanks to their magnetic properties, are used in various industries. One of the technologies for processing these materials is shearing. During shearing, the quality of the sheared surface is evaluated, among other things, which in the case of electrical sheets can also be evaluated by the tear-off angle size. The aim of this paper is therefore to analyze the influence of the shear gap size on the shearing quality of electrical sheets at different shear gap sizes evaluated by the tear-off angle size. The sheared surfaces cut at a shear gap size of 1% and 10% of the thickness of the cut material for three types of electrical sheets were examined.

KEYWORDS; tear-off angle, electrical sheet metal, shearing, shear gap

During the primary acid leaching of the sludge containing copper, manganese and zinc, the leachate composed of manganese and zinc ions as major components was obtained, isolating copper components. Zinc and manganese were separated from the primary leachate by oxalic acid precipitation and carbonate precipitation, respectively. The copper sulfate was recovered from the primary leaching residue by secondary acid leaching. Any harmful solid waste and wastewater (metal ion concentration<5mg/L) were not generated in the proposed process.

KEYWORDS; Metal-bearing sludge, Hydrometallurgical route, Leaching, precipitation, Metal recovery, Environmental management.

This teaching research and reform project is based on the school level teaching research and reform project of Panzhihua University, and carries out research and practice on the construction of an open-research teaching model, which is a first-class course of soil and fertilizer science experiment. The main contents of research, construction and practice include:.......

KEYWORDS; Soil and fertilizer science, experiment, first-class course, open and research-oriented, student assessment system, student evaluation system

Geopolymer recycled aggregate concrete (GRAC), a green material, has dual functions. It uses industrial waste to replace cement in geopolymeritious cementitious materials, reducing CO2 emissions, and substitutes natural aggregates with recycled aggregates to solve problems like construction waste disposal and over - consumption of sand and gravel, meeting global carbon neutrality goals. However, GRAC is a semi-brittle material with size - dependent effects, where mechanical properties decline as dimensions increase........

KEYWORDS; agglomerated recycled concrete; compressive performance; size effect; numerical simulation.

Water has become one of the most important issues of our time, closely intertwined with global warming and population growth. Managing water supply and conserving water resources remains one of the most challenging yet fascinating issues of our era. This paper has a multidisciplinary character, relying on documentation and fundamental knowledge from fields such as physical chemistry, analytical chemistry, biology, computer science, and even mathematics. Water quality is one of the most important factors of a healthy ecosystem and can vary from one....

KEYWORDS; Water quality, pollution, standards, resistivity, TDS, conductivity, dissolved oxygen, salinity, turbidity.

Online education has expanded access to higher education, but performance in online mandatory units remains a persistent problem. The research synthesizes existing empirical studies to determine the key behavioural predictors of poor academic performance in online units. Infrequent logins, decreased time spent studying learning resources, low levels of forum participation, and lack of regular submission of assignments are identified as strong predictors of poor performance. These behaviour markers are a foundation for early warning systems, pedagogical change, and institutional policy development. By locating findings in Open, Distance, and e-Learning (ODeL) environments, the research accentuates the imperative of pairing behavioural analytics with supportive interventions to enhance student retention and academic performance.

KEYWORDS; Online learning; Behavioural indicators; Low academic performance; ODeL; Learning management systems; Student engagement

Bamboo is a fast-growing and ecologically significant plant that contributes to hydrological stability, soil conservation, and sustainable construction, particularly in tropical regions such as Bali. Beyond its mechanical and ecological importance, bamboo culms serve as natural water reservoirs capable of storing substantial volumes within their internodes. This hydrological function is strongly influenced by climatic factors such as rainfall, temperature, relative humidity, and wind speed, which regulate water absorption, storage, and transpiration processes within bamboo tissues......

KEYWORDS; Bamboo, water potential, climatic factors, hydrological balance, eco-hydrological.

Leachate contamination from improper waste disposal poses serious environmental and health risks, particularly in urban academic settings like the University of Port Harcourt, Nigeria. Leachate, a toxic liquid formed from decomposing waste and rainwater infiltration, contains harmful pollutants such as heavy metals, ammonia, and nitrates. If left unchecked, it can contaminate soil and shallow groundwater sources essential for domestic and institutional use.....

KEYWORDS; Contaminants, Leachate, Niger Delta, Conductive, Geophysical, Techniques.

Blanking electrical steel is a key manufacturing operation. The magnitude and evolution of the blanking force directly affect process stability, tool wear, and energy demand, and indirectly affect the integrity of the sheared edge. Punch–die clearance, tool–workpiece interfacial friction, and the geometry and condition of the cutting edge strongly shape local plastic deformation and the fracture mechanism, and thus the form and peak of the force–stroke response. The aim of the experiment was to quantify the effects of punch–die clearance and punch coatings on the blanking force......

KEYWORDS; Blanking,shearing, coating, blanking force, punch-die clearance.

The article investigates how welding speed affects the properties of hardmetal layers, with a particular focus on evaluating the abrasive wear of coatings produced by tubular wire welding technology. The layers were deposited using Fluxofil 54, a flux-cored wire supplied by ESAB. During sample fabrication, two different welding speeds were applied — 125 m/min and 18 m/min. The study then aimed to determine how abrasive wear depends on the hardness of different abrasive materials.Two types of abrasives were used in the experiments: silicon dioxide (SiO₂, silica) and aluminum oxide..........

KEYWORDS; Abrasive wear, weld, resistance

Lithium compounds play an extremely important role in the production of lithium-ion batteries. Lithium ions in wastewater and amorphous boron compounds of Kırka Boron Plant, where Turkey's important boron mine is extracted, were determined. Lithium ions from wastewater and boron compounds were recovered by using an absorbent containing redox type spinel LiMn2O4. The pH value of the solution and the concentration of the absorbent were investigated as suitable working conditions for the determination of lithium ions. Appropriate pH value was determined as 9.85 and absorbent value.....

KEYWORDS; Lithium ions, Boron compounds, Pool water, Absorbent, ICP-OES.

Coastal areas are highly dynamic environments that undergo continuous changes due to natural processes and human activities. Monitoring shoreline dynamics is crucial for understanding coastal behavior and supporting sustainable management, particularly in regions experiencing rapid development such as Canggu Beach, Bali. This study focuses on detecting and analyzing shoreline changes using a combination of remote sensing and digital image processing techniques. Sentinel-2 satellite imagery from 2019 to 2024 was utilized to evaluate shoreline variations through the Normalized Difference......

KEYWORDS; Shoreline change detection, NDWI, Sentinel-2, image processing, coastal monitoring.

In this paper, two different system architectures—cloud-based processing and local inference using TinyML—for image-based anomaly detection using the ESP32-CAM microcontroller are investigated and contrasted. Images taken by the ESP32-CAM were sent to a local server in the cloud-based configuration, where anomaly identification was carried out externally. On the other hand, the edge-based method allowed for on-device image categorization without the need for network access by training a MobileNetV2 model straight onto the ESP32-CAM utilizing the Edge Impulse platform......

KEYWORDS; TinyML, Edge Impulse,Esp32,Embedded Systems