Poznań University of Technology

Heat treatment technique and fuelwood density shape silcrete flake-edge geometry

Silcrete heat treatment was a transformative technological innovation in the Middle Stone Age, enabling toolmakers to improve the flaking properties of this raw material. Recent research has highlighted that silcrete heat treatment is not a uniform process, different silcrete sou...

A preliminary model for estimating mass-specific oxygen uptake during manual wheelchair propulsion from mechanical power and heart rate

Manual wheelchair users may have reduced physical activity and total energy expenditure, while wearable devices may not adequately capture external mechanical demand during wheelchair propulsion. This pilot study examined whether wheel-level mechanical power combined with heart r...

Saponins induce lipid-dependent structural heterogeneity and modulate membrane organization in phospholipid bilayers

Abstract Saponins are amphiphilic natural compounds whose membrane activity is commonly attributed to sterol complexation, whereas their effects on sterol-free membranes remain poorly understood. Here, we investigated how lipid packing governs the interaction of a Saponaria offic...

FPGA-Based Real-Time Implementation and Experimental Validation of an FM-ASK Chaotic Communication Scheme

Chaotic waveforms provide a deterministic and noise-like means of masking information in wireless communication systems. This work presents an FPGA-based implementation and experimental validation of a frequency-modulated amplitude-shift keying (FM-ASK) chaotic communication sche...

Readiness Is Not Leverage: Latent-Field Geometry as Spatial Decision Support in Sustainable Regeneration

A key aspect of sustainability is regenerating inhabited urban areas without demolishing them, since this helps retain the embodied carbon and spatial capital built up in existing buildings while preventing the displacement that results from clearing land. In this approach, which...

Predicting Reactivity and Enantioselectivity from Small Experimental Datasets: A Case Study in Asymmetric Magnesium Catalysis

Abstract Predicting reactivity and enantioselectivity from limited experimental data remains a central challenge in asymmetric catalysis, where reaction development is often guided by small, internally generated scope datasets rather than large screening campaigns. Here, we show...

Applying convolutional neural networks to X-ray images to improve postharvest detection of fruit fly infestation

Early detection of fruit fly (Diptera: Tephritidae) infestation in traded fruit is important for maintaining phytosanitary security, particularly for quarantine pests. This study evaluated the integration of micro-focus X-ray computed tomography (µCT) and deep learning as a non-d...

Enhancing classical pathfinding via probabilistically guided search governed by Grover probability distributions

Pathfinding on grid maps with obstacles is a fundamental problem in robotics, autonomous mechatronic systems, and artificial intelligence. Classical algorithms such as BFS, Dijkstra, and A* guarantee optimal solutions under specific conditions, but often explore many redundant no...

Research on the Self-Heating Effect in Resistance Temperature Sensors for Flow Measurements

This article introduces an experimental approach to evaluating the thermal resistance of industrial resistance temperature sensors and demonstrates their use for estimating the flow rate of the surrounding medium. A new method, the Self-Heating Effect Anemometry (SHEA) method, is...

Cost-Effective Edge AI: Hailo-8 Powered Raspberry Pi vs. NVIDIA Jetson AGX Orin in Airport Infrastructure Monitoring

The automatic inspection of airport infrastructure, specifically horizontal surface markings and Airfield Ground Lighting (AGL), is a critical task for maintaining aviation safety and operational efficiency. As the aviation industry shifts from manual surveys to automated visual...

Gate-to-Gate Benchmarking of Electricity Use and Electricity-Related CO2 Emissions in Mechanical Cable Recycling: A Descriptive Industrial Case Report from Poland

Cable scrap is a high-grade secondary copper resource, but transparent plant-scale evidence on the operational energy and emissions performance of mechanical separation lines remains limited. This descriptive industrial case report presents a non-replicated comparison of complete...

Stand Age, Standard Retention Density and Site Conditions as Drivers of Shoot Biomass Accumulation in Mediterranean Oak Coppices

ABSTRACT Mediterranean oak coppices represent an important fuelwood resource in Central Italy, but management decisions are often constrained by limited quantitative evidence on the relative importance of stand development, standard retention, site conditions, and climate in driv...