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Abstract: People with Parkinson’s Disease (PD) often compensate for impaired automatic balance control by engaging additional attentional resources for motor tasks. With disease progression, their cognitive system too becomes increasingly affected, further impairing postural stability. The interaction between cognitive and motor systems in the early disease stages, however, remains poorly investigated. The present study aimed to elucidate behavioral and neurophysiological changes in early-stage PD to identify with greater accuracy the specific disease-related discrepancies from healthy functioning on both cognitive and motor systems. Eighteen participants with PD (aged 62.9±6.6 years) and 18 healthy matched controls (aged 62.9±6.4 years) performed (i) a balancing single task in a semi-tandem stance (ST-sts), (ii) a single visual oddball task with conflicting Stroop color-word stimuli (ST-Stroop), and (iii) a dual-task (DT) combining the two single tasks. Centre of pressure displacement using a force plate and 128-channel electroencephalography (EEG) were recorded. Participants with PD exhibited reduced postural sway compared to controls, and postural sway was lower in DT as opposed to ST. Reduced sway in PD might be attributed to postural rigidity and tonic muscle activation, while in the DT, it might reflect resource conflicts. EEG analyses indicated distinct spectral activity patterns: the central midline low-frequency (δ, θ) power increased with cognitive load, centroparietal β desynchronization intensified with motor load, and parietal α desynchronization heightened during DT in both PD and control groups, underscoring specific frequency bands’ governing roles in cognitivemotor processing. Furthermore, PD participants exhibited heightened or prolonged responses in ERP components related to working memory (frontocentral P2) and conflict resolution (P300), possibly reflecting compensatory neural strategies. Overall, these findings suggest that cognitive capacities, particularly selective attention, might be more affected than sensory acuity in early PD, highlighting areas for targeted interventions.
Keywords: EEG, semi-tandem stance, COP (Center of pressure), Parkinson's disease, cognitive-motor dual-tasking
Published in DiRROS: 08.09.2025; Views: 293; Downloads: 139
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Abstract: Ensembles of actuated colloids are excellent model systems to explore emergent out-of-equilibrium structures, complex collective dynamics, and design rules for the next generation materials. Here, we demonstrate that ferromagnetic microparticles suspended at an air-water interface and energized by an external rotating magnetic field spontaneously form dynamic ensembles of synchronized spinners in a certain range of the excitation field parameters. Each spinner generates strong hydrodynamic flows, and collective interactions of the multiple spinners promote a formation of dynamic lattices. On the basis of experiments and simulations, we reveal structural transitions from liquid to nearly crystalline states in this novel active spinner material and demonstrate that dynamic spinner lattices are reconfigurable, capable of self-healing behavior and that the transport of embedded inert cargo particles can be remotely tuned by the parameters of the external excitation field. Our findings provide insights into the behavior of active spinner materials with reconfigurable structural order and tunable functionalities.
Keywords: actuated colloids, ferromagnetic microparticles, reconfigurable structure
Published in DiRROS: 08.09.2025; Views: 300; Downloads: 130
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Abstract: Desalination is becoming increasingly important to meet the growing demand for freshwater. However, a major drawback of this technology is the production of hypersaline brine. This by-product contains salts and contaminants that have been removed during the desalination process, including antiscalants, cleaning agents, heavy metals, and organic compounds. Instead of disposing of this brine and causing environmental harm, new strategies should be developed to transform brine from a burden into an opportunity with environmental and economic benefits. Brine can harbor halotolerant and halophilic microorganisms, making it a valuable resource for studying microbial diversity, adaptations and exploring untapped biotechnological opportunities in pharmaceutical, industrial, and ecological fields. We propose two strategies of innovation: (i) using brine to cultivate micro- and macro-organisms, both of which can create circular economy models tailored to global and local needs. (ii) In addition, the amount of brine generated by desalination plants can be reduced by integrating or coupling them with biodesalination modules. These modules would harness halotolerant and halophilic organisms to retain and assimilate salts, reducing the environmental impact of desalination.
Keywords: desalination, brine, environmental impact, circular economy, biotechnology
Published in DiRROS: 08.09.2025; Views: 305; Downloads: 136
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Keywords: magnetic microswimmers, microfluidics, self-assembly
Published in DiRROS: 08.09.2025; Views: 264; Downloads: 74
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Abstract: Indoor air quality is a significant aspect of public health, yet it remains less studied than outdoor air pollution. Understudied indoor pollutants include volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs). This review focuses on these two groups of compounds known for their health effects, including respiratory issues, neurological disorders, and carcinogenicity. We systematically compiled and analyzed data from studies reporting measured concentrations of VOCs and PAHs in European indoor environments—homes, schools, and offices—published in the past two decades. Concentration levels vary substantially across studies, influenced by regional differences, climate, building type, ventilation systems, and indoor activities. Identified sources include tobacco smoke, cooking, heating (e.g., biomass burning), and off-gassing from construction and furnishing materials. Our analysis reveals clear geographic patterns: lower concentrations of VOCs and PAHs are consistently reported in Northern and Western European countries, likely due to stricter air quality regulations, cleaner outdoor air, greater use of electric heating, and more advanced ventilation systems. Conversely, higher concentrations are more commonly observed in Southern and Eastern Europe, where biomass heating and poorer ventilation remain more prevalent. Seasonal variation also has a significant role, with higher indoor levels typically measured during colder months due to increased heating and reduced air exchange. This highlights the need for improved indoor air quality management practices and regulatory standards to minimize the health risks associated with VOCs and PAHs. This review of 46 scientific publications is aimed at informing future studies and guiding future field measurements and risk assessments in epidemiological studies.
Keywords: health risks, indoor air quality, PAHs, public health, VOCs
Published in DiRROS: 08.09.2025; Views: 367; Downloads: 148
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