Revealing speciation transformation and stabilization mechanisms of associated trace hazardous beryllium and thallium during lithium extraction: Achieving targeted detoxification of lithium slag.

Remediation of mine farmland soil using hydrothermal carbonization aqueous phase from Baijiu distillers' grains: integrated benefits of metal detoxification and fertility enhancement.

Positive vegetation response to nitrogen enrichment offsets salt marsh cover decline without altering dissolved carbon concentration in sediment pore water.

Abstract Comprehensive evidence on affective polarization stems from bipartisan political systems with well-defined partisan identities and unidimensional measures of ingroup favoritism and outgroup dislike, while neglecting shared emotions and intergroup emotional dynamics. This study addresses these gaps. Before the 2021 German federal elections, we surveyed individuals in Germany concerned about climate change (N=2,477) or asylum policies (N=3,177) using a large, innovative social media sample. We assessed positive and negative feelings toward supporters and opponents of progressive policies on these issues and the perceived emotional alignment with these opinion-based groups. Cluster analyses reveal two affectively polarized groups, a group of resenters characterized by negative affect and emotional disalignment, and three groups showing affective differentiation but lacking emotional identification. Compared to the other groups, the two polarized opinion-based groups perceive themselves as being more emotionally similar to like-minded citizens and more dissimilar from those with opposing views. They also experience consistent, yet distinct patterns of emotions towards like-minded and dissenting others regarding anger, disgust, contempt, and joy. The two groups are socio-demographically distinct and have less contact with people holding opposite views. These structural divisions are reflected in behavioral patterns. Polarized groups engage in more political discussions, especially with strong ties. However, only polarized conservatives tend to engage in political discussions with weak ties, such as colleagues or acquaintances. Polarized progressives are more likely to engage in collective forms of political mobilization. In essence, this work underscores the interplay among the emotional, structural, and interactional components of issue-based affective polarization.

ABSTRACT In the aftermath of the Cold War, political mobilization and state-society relations were transformed by the rise of digital technologies. This era witnessed the emergence of ‘digital activism’, often framed as spontaneous and ideologically neutral. However, such assumptions deserve critical scrutiny. This article explores the role of American think tanks in shaping protest movements during the Arab Spring by providing activists with training, resources, and narrative frameworks. It emphasizes the rise of fourth-generation think tanks operating digitally and situates their activities within broader U.S. foreign policy goals, particularly regarding Middle Eastern energy geopolitics. By analyzing think tank reports, media discourse, and institutional publications, the study assesses whether digital activism represented a new form of grassroots mobilization or merely continued existing patterns of geopolitical influence under new technological forms.

This study examines remote work as a form of virtual mobility and its implications for employees' subjective wellbeing (SWB). Using the complementary perspectives of Conservation of Resources (COR) and boundary theory, it presents a theoretical framework that explains how resource dynamics, boundary permeability, and time perceptions influence wellbeing in remote work. The study employs a digital ethnographic design based on 11 semi-structured interviews. These are complemented by field notes and an experiential elicitation task. The data were analyzed using reflexive thematic analysis, supported by computational techniques such as similarity measures, co-occurrence networks, and visualization tools implemented in R. The findings identify three overarching themes: temporal experiences, in which acceleration, stagnation and fluctuating emotional rhythms that disrupted affective wellbeing; blurred boundaries, in which work-home permeability, erosion of collegial ties, and selective connections that reshape SWB; and coping strategies, which included boundary setting practices, job crafting, rituals, and recovery. The experimental task revealed a systematic bias toward underestimating time, consistent with participants' narratives of drift in monotonous work contexts. The study advances research into mobility and wellbeing theoretically by framing virtual mobility and multidimensional SWB, methodologically by showcasing the value of digital ethnography for capturing lived experiences, and practically by underlining the importance of organizational support and policies.

Sustainable mobility has been an emerging topic in recent years, and in this regard, investing heavily in public transport seems to be the best solution. For people to embrace this form of mobility, services must meet expectations, and one of the parameters to be considered is the comfort offered by vehicles. This is directly affected by the vibrations that affect vehicles. This work was developed to create a proof of concept for a support structure for bus seats that mitigates the vibrations felt by passengers, making these vehicles more comfortable and appealing to use. Current systems are expensive and complex, and the proposed solution presented here is based on the field of metamaterials. This study investigated vehicle dynamic loads and comfort standards from ISO 2631 to design a metamaterial-based seat support with optimized stiffness and damping. Using MATLAB (R2024b), ideal parameters were defined (k = 13,422.66 N/m, c = 534.07 Ns/m), with stiffness provided by the cell geometry and damping provided by a viscoelastic material. Parametric modeling and simulations in ANSYS (2025 R2) assessed stiffness, damping, and strength, followed by prototype fabrication and testing. The best structure showed 2.23 m/s2 at 4.5 Hz, achieving the target transmissibility above 8 Hz. While most designs effectively attenuate vibrations beyond 5 Hz, resonance peaks remain high, suggesting future work should focus on improved resonance reduction strategies.

ABSTRACT As a result of the crisis of legitimacy in the Colombian political system, there has been widespread mistrust of institutions among the civilian population. Thus, during the COVID-19 pandemic and the 2021 national strike, social media, especially Twitter, became essential platforms for political expression, mobilisation, and identity reconstruction. This article analyzes the role of Twitter in the reconstruction of political identities during the 2021 social protests in Colombia, examining how digital interactions shaped collective action and political polarisation. Furthermore, Melucci's theory of collective action, Kaldor's concept of new forms of politics, and Hegel's theories of political identity form the theoretical basis of this study. Methodologically, virtual ethnography and qualitative analysis of 216 tweets posted by leaders across the Colombian political spectrum during the national strike were used. The results show that Twitter functioned as a virtual rallying tool, amplifying radical discourses, facilitating the coordination of social demands, and contributing to the restructuring of political identities. These online actions also translated into mobilizations outside the online space, restructuring existing patterns of participation. In conclusion, Twitter played a vital role in transforming political identities and structures in Colombia, both by enabling new forms of mobilisation and by intensifying radicalisation and misinformation.

Abstract The Great Crossing: From Senegalese Emigration to Brazilian Settlement. Political Geography of a Transatlantic Route and Socio-Economic Analysis of an Urban Integration This article, presented at the founding congress of the Association Internationale de Géographie Francophone in 2023, adopts a multi-sited and multi-scalar approach to analyze Senegalese migration trajectories to Brazil in the 2010s. It examines the political geography of these South-South routes, the transitions between stages, and the events that have reconfigured migration paths. The study also explores how Senegalese migrants integrate into Brazilian cities, transform urban spaces through new economic activities, and how settlement gradually evolves into a form of commercial and circular mobility.

The industrial area of the former “Vostsibelement” battery plant (Svirsk, Irkutsk Region) is identified as a hotspot of heavy metal soil contamination. To select the most effective soil reclamation strategies, the mobility and chemical forms of heavy metals across the entire site were analyzed. Samples with average and maximum lead content show a higher content of residual fraction of heavy metals, which includes some of the most stable and difficult to extract compounds of the latter, which are of technogenic origin. A decrease in the fraction of heavy metals bound to organic matter was observed. Arsenic exhibited the highest mobility among the studied samples. Based on the obtained data and the identified contamination zonality, a comprehensive reclamation approach is recommended.

ABSTRACT Posting has become the most important channel of temporary intra-European labour mobility by far. This raises a fundamental question: do posted workers eventually transition into settled migrant workers? This paper uses comprehensive administrative data for Belgium, one of the most important receiving countries for posted workers in both relative and absolute terms. We examine posting trajectories in terms of their duration and frequency and assess whether, and under which conditions, posted workers seek more permanent settlement. We find that while a substantial numbers of posted workers reside in the destination country for extended periods of time, transitions from posting to settlement migration are in fact exceptional. Such transitions are more likely among workers with repeated and prolonged posting trajectories, particularly those with multiple postings, long cumulative durations, and fragmented careers across several employers. The main conclusion is that posting is a form of mobility that remains quite distinct from traditional labour migration. The situation of posted workers can be characterised as one of lasting temporariness.

Dissolved mercury (Hg) is the most mobile and reactive form of mercury in aquatic ecosystems, yet it is poorly documented in tropical lagoons. This study examines the seasonal dynamics of dissolved total Hg (THg) in the water column and sediment pore waters of the Ebrié lagoon (Côte d’Ivoire), a tropical estuarine system under intense anthropogenic pressure. Sampling occurred at eight stations during the dry (February 2017) and rainy (July 2017) seasons. Total dissolved Hg was measured using thermal decomposition atomic absorption spectrometry and analyzed in relation to physicochemical parameters, microbial activity, and Hg concentrations in Tilapia sp. Dissolved Hg in pore waters (0.07–0.33 µg.L⁻¹) was consistently higher than in the water column (0.03–0.11 µg.L⁻¹), confirming sediments as a labile Hg reservoir. Seasonal differences were limited, whereas spatial variability reflected local anthropogenic inputs and hydrodynamic conditions. Correlations showed distinct seasonal controls: during the rainy season, dissolved organic carbon and oxygen availability were closely linked to Hg solubilization in pore waters; in the dry season, microbial activity, salinity, temperature, and redox conditions more strongly influenced water-column Hg. No direct relationship existed between pore-water and water-column Hg, indicating sediment–water transfer is not systematic. Compared with other lagoonal systems, Ebrié lagoon’s dissolved Hg falls within the upper global range. These results highlight dissolved Hg’s critical role in Hg mobility and bioavailability and underscore the need to integrate dissolved Hg measurements into ecological and human health risk assessments in tropical coastal environments.

Purpose: Walking is both one of the most accessible ways to meet physical activity goals, while also being a very sustainable urban mobility form. Whether or not people walk is closely tied to the perceived quality of the walking environment, commonly referred to as walkability. While previous research has identified various key determinants of perceived walkability, including security, traffic safety, infrastructure, and environmental features, the role of seasonal variation remains underexplored. This study aims to fill this gap by exploring perceived walkability changes from summer to autumn. Methods: During the summer and autumn (2024), we interviewed 229 pedestrians in two streets in Leuven using the participatory tool ‘Walkability App’ (Walk21). The reported experiences were allocated into pre-existing categories of walking experiences within the Walkability App and were allocated into positive and negative clusters. To assess the changes between the seasons, we compared the differences between the experiences collected in summer and in autumn on the key dimensions mentioned above. Results: First, using ordinal logistic regression, we compared the differences in perceived security between the seasons. We uncovered a significant decline in the main effect of perceived security during autumn compared to summer (odds ratio (OR) = 0.277; 95% confidence interval (CI) [0.101, 0.710]) as well as a significant interaction between season and time of the day (OR = 0.195; 95% CI [0.049, 0.795]), indicating the lack of safety specifically during the evening in autumn. Second, we found a significant interaction between season and time of the day for the item ‘missing lighting, seating, or ramps’, showing an increased endorsement of this item during the evening in autumn (OR= 4.816; 95% CI [1.282, 21.161]). Third, contrary to our expectations, we found no significant change in pedestrian volume (i.e. people walking) between the seasons using the Quasi-Poisson Regression analysis (p > .05). Finally, walking enjoyment significantly declined in autumn compared to summer (p = 0.047). Conclusion: The study emphasises the need to take into account seasonal variations. For practitioners and policymakers specifically, the results highlight opportunities to design more adaptive, seasonally responsive streets, particularly through improving lighting and the perceived safety, to also support walking in darker seasons.

Environmental pollution with heavy metals, including xenobiotic elements with high cumulative characteristics, is currently an urgent problem. Lead is a priority pollutant of the first hazard class that enters the environment through fertilizers and as a result of technological emissions (dust, vapors, solutions), which easily settle on soil and water surfaces. Soil microorganisms of the genus Bacillus spp. with high accumulation characteristics can be used as effective sorbents of mobile forms of toxic elements. The paper presents results of experimental studies on the isolation and evaluation of the effectiveness of Bacillus spp. strains isolated from territories with high anthropogenic load. The use of the well diffusion method in combination with the serial dilution method, as well as the “replica” method with seeding on substrates with high cationic load by adding Pb(NO 3 ) 2 “P.A.” in concentrations of 0.031 M, 0.016 M and 0.008 M allowed isolation of a promising B. licheniformis RZn strain characterized by stable growth on media with Pb(NO 3 ) 2 addition at a concentration of 0.031 M and lead cation sorption rates from the substrate up to 65.39%. In a model experiment using test cultures of Sinapis alba L. and Triticum aestivum L., a reduction in the toxic effect of lead on germination rates as well as plant morphometric parameters was observed. This indicates the significant biological potential of the studied strain as a remediator of lead ions.

In opposing the Job Creation Law, a government policy seen as harmful to workers' rights and weakening the position of both workers and employers. The research does not only focus on individuals but also includes objects and other things involved in the social change process. The study reveals that the Job Creation Law has caused controversy since it was enacted, and KASBI, as an alternative confederation, has used various forms of struggle such as mass actions, advocacy, and building solidarity with civil society networks. The purpose of this study is to understand KASBI's role in fighting for workers' interests, the forms of mobilization used, and the challenges faced during the process of rejecting the Job Creation Law. This study uses a qualitative descriptive approach, including in-depth interviews with KASBI members and leaders, field observations during protest actions, and analysis of documents related to the policy and official statements from the organization. The findings show that KASBI is not just a platform for representing workers, but also a consistent social movement actor in expressing opposition through various forms of demonstrations, critical campaign efforts, and strategies for consolidation at the grassroots level. However, KASBI also faces several challenges such as limited resources, political pressure, and attempts at discrediting from parties that support the Job Creation Law. KASBI is a symbol of workers' resistance to free market policies in Indonesia.

The article is devoted to the study of the theoretical and legal foundations for adapting Ukrainian tax legislation to the conditions of the digital economy and transformations caused by the development of digital technologies and the emergence of new value creation models. The paper analyzes changes in the structure of economic activity, in particular the growing role of intangible assets, remote forms of service provision, platform interaction, and high capital mobility, which complicate the application of traditional categories of tax law. The article examines the problems of determining tax jurisdiction in the context of “economic presence without physical presence” and the need to clarify approaches to establishing tax ties. The article highlights international trends in tax reform in the digital environment, in particular the Pillar One and Pillar Two concepts within the OECD/BEPS initiatives aimed at redistributing tax rights between jurisdictions and introducing a global minimum tax rate. The impact of these approaches on national systems is analyzed, including the requirements for harmonizing substantive and procedural law. At the level of Ukrainian legislation, regulatory acts that form the basis for the development of the digital economy are considered, in particular, the Law of Ukraine “On Stimulating the Development of the Digital Economy in Ukraine” and the special regime “Diy.City.” The article separately examines the peculiarities of taxation of electronic services provided by non-residents, the procedure for their registration as VAT payers, problematic aspects of administering such transactions, and the need to unify procedures. The article also analyzes the directions of development of tax transparency and reporting of digital platforms based on a model of rules similar to the European DAC7 directive. The role of digital tools in the modernization of tax administration is outlined, including the introduction of e-invoicing, SAF-T, electronic services, and the use of analytical technologies to identify risky transactions. In summary, the adaptation of the tax system to the digital economy requires a comprehensive update of material, procedural, and institutional norms, harmonization with international standards, and the formation of an effective tax administration infrastructure. The article reflects key trends, challenges, and possible directions for further improvement of Ukraine’s tax policy in the context of digital transformation.

In the context of territorial displacement and following a long-termperspective, this article examines political exile in Latin America, with itsaccumulation of pressures, socio-political and cultural impacts. It analyzesits importance in shaping collective identities, its systemic impact on thestyle of doing politics in the region, and the contribution of exiles andreturnees to numerous facets of culture and politics. The text highlights theinstitutional logic of exile as a mechanism of political exclusion and controlthat, although it shares characteristics with other forms of human mobility,displays a particular physiognomy that has impacted all Latin Americancountries for a long time and is still projected in recent history.

E-scooters have become a widely adopted form of urban mobility, increasing the need to understand how vibration exposure affects comfort and safety. While most studies have examined the effects of speed, pavement roughness, and overall tire stiffness, none have evaluated how differing stiffness curves between the front and rear wheels influence rider comfort. This article uses real stiffness curves for rigid and inflatable tires at various pressures (30 psi, 60 psi, and rigid) to assess how front–rear stiffness asymmetry affects vibration transmission across speeds (10–20–30 km/h) and two roughness levels (low and high). The analysis, following the standard UNE-ISO 2631-1:2008 and supported by a multiple-regression model (adjusted R2 = 93.84%, homoscedastic residuals), shows that speed and roughness dominate the comfort response (98.9%), while tire stiffness offers a secondary (1.1%) but useful tuning parameter, inducing comfort index variations exceeding 14% between front–rear pressure combinations under typical urban conditions (~20 km/h, low roughness). In this case, the most favorable configuration corresponds to inflatable tires with slightly higher front pressure (+2.9–4.35 psi), whereas solid tires consistently yield the poorest comfort. These findings underscore the role of front–rear stiffness management in improving ride quality and provide practical guidance for optimal inflation strategies in urban e-scooters.

ABSTRACT This article introduces the concept of nudging around to capture the lateral mobility of irregular migrants in contexts of jurisdictional ambiguity. Drawing on the case of Cyprus, an island simultaneously shaped by its role as a transit point and by a decades-long frozen conflict, we show how irregular migrants are not simply pushed back or moving forward, but are redirected across overlapping and contested jurisdictions: the Republic of Cyprus (RoC), the Turkish Republic of Northern Cyprus (TRNC), the UK-administered Sovereign Base Areas (SBAs) and the UN-controlled buffer zone. Based on semi-structured interviews with policymakers, civil society representatives and international organisations, the paper identifies four interrelated dynamics that structure this process: oscillation between mobility and immobility; reliance on incomplete or misleading information; the effects of international responses; and the vulnerabilities generated by broader crises, such as COVID-19. The contribution of the article is twofold. First, it conceptualises nudging around as a distinct form of mobility within frozen conflicts, complementing but differing from pushbacks, forced returns or linear transit. Second, it expands the literature on frozen conflicts and migration governance by foregrounding how their dynamics shape the trajectories of third-country nationals, a group largely absent from existing research.

The proliferation of mobile banking and financial service applications has revolutionized document processing workflows with remote capture and validation capabilities. Traditional server-based systems for processing financial documents including checks, mortgage instruments, trust agreements, and tax compliance forms capture images and forward them to centralized computing infrastructure for optical character recognition and validation workflows, which expose weaknesses in terms of latency, privacy risks, and operational expenses. Contemporary edge computing paradigms allow artificial intelligence models to run directly on mobile devices, freeing up backend servers and processing sensitive financial documents in local settings. Resource-efficient anchor-free object detection networks designed for use in constrained environments enable real-time extraction of critical document components essential for validation and authentication workflows across diverse financial instrument types. Architectures deployed at the edge exhibit substantial benefits in the form of lower transaction latency, better privacy safeguarding with localized processing, lower infrastructure expenses, and increased reliability under connectivity-limited circumstances. Federated learning mechanisms facilitate ongoing model improvement without centralized sensitive data, maintaining user privacy while enhancing detection capabilities. Persistent challenges include model drift due to changing document designs, adversarial attack susceptibility, device security needs, and governance complexity for distributed deployment. Hardware-software co-design efforts hold out the promise of specialized neural processing units with custom operations supporting document intelligence tasks, allowing for more advanced capabilities within mobile form factors and power budgets.