Search Results (141)

What elements of nature do people involved in conservation projects seek to protect, and why? How do they identify and relate to nature? Answers to such fundamental questions are shaped by normative assumptions that can result in distinct conservation strategies and practices. Despite their importance, normative assumptions are rarely explicitly stated in conservation sciences, possibly because an epistemology of modern science suggests that normative backgrounds are not relevant to the production of objective knowledge, or because researchers and practitioners are unaware of the diversity of positions that exist. Using a combination of qualitative and quantitative methods, we created a catalogue of existing normative positions in conservation literature and described their key characteristics. We described 72 distinctive normative positions about human–nature relationships. Each position was characterized by unique combinations of value-states belonging to one or more of the following five dimensions: ontology (the positionality of human with respect to nature), axiology (value systems and ethical frameworks), pragmatism (extent of human interventions), epistemology (knowledge sources), and agency (agents of change). We then scored each position in terms of its alignment (support, opposition, or neutrality) with respect to all value-states within each dimension. A fuzzy correspondence analysis revealed that the field of conservation is heterogeneous beyond the conventional gradient of intrinsic–instrumental–relational values. The frequency and circumstances under which stakeholders adopt different normative positions are unknown, but the list of dimensions and associated values provided in this study may serve as a checklist for scoping this diversity. Consideration of values stemming from alternative normative positions may help broaden support for conservation actions. Full article

The evolving role of paramedics presents a unique opportunity to enhance care for people who use drugs, a population disproportionately affected by systemic barriers and inequities. In fragmented healthcare systems, paramedics are well-positioned to improve access through initiatives such as social prescribing and harm reduction. This theory-driven commentary explores how Network Theory and Actor Network Theory provide valuable theoretical underpinnings to conceptualize and strengthen the integration of paramedics into care networks. By emphasizing the centrality of paramedics and their connections with both human and non-human actors, these theories illuminate the relational dynamics that influence effective care delivery. We argue that leveraging paramedics’ positionality can address gaps in system navigation, improve patient outcomes, and inform policy reforms. Future work should examine the roles of other key actors, strengthen paramedic advocacy, and identify strategies to overcome barriers to care for people who use drugs. Full article

Oral narratives play a crucial role in shaping the historical consciousness of Indigenous communities in Northeast India, where history writing is a relatively recent phenomenon. Among the Mizos, Nagas, Khasis, Kuki-Chins, and other Indigenous tribes of Northeast India, including the Bodos, the Garos, the Dimasas, or the Karbis of Assam, much of what is considered written history emerged during British colonial rule. Native historians later continued it in postcolonial India. However, written history, especially when based on fragmented colonial records, includes interpretive gaps. In such contexts, oral traditions provide complementary, and frequently, more authoritative frameworks rooted in cultural memory and collective transmission. Oral narratives, including ritual poetry, folk songs, myths, and folktales, serve as vital mediums for reconstructing the past. Scholars such as Jan Vansina view oral narratives as essential for understanding the histories of societies without written records, while Paul Thompson sees them as both a discovery and a recovery of cultural memory. Romila Thapar argues that narratives become indicative of perspectives and conditions in societies of the past, functioning as a palimpsest with multiple layers of meaning accruing over generations as they are recreated or reiterated over time. The folk narratives of the Mizos and Angami Nagas not only recount their origins and historical migrations, but also map significant geographical and cultural landmarks, such as Khezakheno and Lungterok in Nagaland, Rounglevaisuo in Manipur, and Chhinlung or Rih Dil on the Mizoram–Myanmar border. These narratives constitute a cultural understanding of the past, aligning with Greg Dening’s concept of “public knowledge of the past,” which is “culturally shared.” Additionally, as Linda Tuhiwai Smith posits, such stories, as embodiments of the past, and of socio-cultural practices of communities, create spaces of resistance and reappropriation of Indigenous identities even as they reiterate the marginalization of these communities. This paper deploys these ideas to examine how oral narratives can be used to decolonize grand narratives of history, enabling Indigenous peoples, such as the Mizos and the Angamis in North East India, to reaffirm their positionalities within the postcolonial nation. Full article

In our previous studies, methylated CpG oligodeoxynucleotides (ODN) derived from Bifidobacterium longum subsp. infantis have demonstrated immunomodulatory effects through the induction of regulatory T cells (Tregs). To define the structural determinants underlying this effect, we synthesized four CpG ODNs varying in methylation degree, CpG motif placement, and backbone length. These include (1) ODN-A (2m-V1), a 20-nucleotide CpG oligodeoxynucleotide incorporating two 5-methylcytosines at positions 4 and 12 within centrally placed CpG motifs; (2) ODN-B (um-V2), a 20-nucleotide CpG oligodeoxynucleotide with a backbone structure identical to ODN-A but unmethylated; (3) ODN-C (2m’-V3), a 20-nucleotide CpG oligodeoxynucleotide with a backbone structure identical to ODN-A, but with two 5-methylcytosines shifted to positions 7 and 15; (4) ODN-D (3m-V4), a 27-nucleotide CpG oligodeoxynucleotide with an extended backbone structure, this time with three 5-methylcytosines at positions 3, 11, and 19. Using a murine model of an OVA-induced allergy, we show that methylated ODN-A (2m-V1) and ODN-D (3m-V4) markedly reduce serum anti-OVA IgE, clinical symptoms, eosinophilic infiltration, and Th2/Th17 responses, while promoting splenic Treg expansion and IL-10 production. In contrast, unmethylated ODN-B (um-V2) and a positionally altered methylated ODN-C (2m’-V3) both failed to suppress allergic inflammation, and, in contrast, enhanced the Th2/Th17 response and induced robust in vitro Toll-like receptors TLR7/8/9 expression in native splenocytes. These findings suggest that both methylation and motif architecture critically influence the immunologic profile of CpG ODNs. Our results provide mechanistic insights into CpG ODN structure/function relationships and support the therapeutic potential of select methylated sequences for restoring immune tolerance in allergic diseases. Full article

Compliant mechanisms are often utilized in precise positioning systems but have not been thoroughly examined in vibration-aided fine CNC machining. This study aims to develop a new 02-DOF flexure stage for vibration-aided fine CNC milling. A hybrid displacement amplifier, featuring a two-lever mechanism, two Scott–Russell mechanisms, and a parallel leading mechanism, was integrated into a symmetric perpendicular series configuration to create an innovative design. The pseudo-rigid body model (PRBM), Lagrangian approach, finite element analysis (FEA), and Firefly optimization algorithm were employed to develop, verify, and optimize the quality response of the new positioner. The PRBM and Lagrangian methods were used to construct an analytical model, while finite element analysis was used to validate the theoretical solution. The primary natural frequency results from theoretical and FEM methods were 318.16 Hz and 308.79 Hz, respectively. The difference between these techniques was 3.04%, demonstrating a reliable modelling strategy. The Firefly optimization approach applied mathematical equations to enhance the key design factors of the mechanism. The prototype was then built, revealing an error of 7.23% between the experimental and simulated frequencies of 331.116 Hz and 308.79 Hz, respectively. The specimen was subsequently mounted on the fabricated optimization positioner, and vibration-assisted fine CNC milling was performed at 100–1000 Hz. At 400 Hz, the specimen achieved ideal surface roughness with a Ra value of 0.187 µm. The developed design is a potential structure that generates non-resonant frequency power for vibration-aided fine CNC milling. Full article

This paper explores suicidality and suicide research from an autoethnographic analysis framed through grief concepts. Self-identifying as a Muslim in the United States, the author explains how lived experiences being racialized through Islamophobia, identifying as a genderfluid non-binary woman, being socially biracial, holding a postpartum bipolar diagnosis, and being connected to a diaspora, are critical elements to develop a deeper sociocultural understanding of suicide. Grief concepts that are used to analyze these themes include disenfranchised grief, ambiguous loss, anticipatory grief, and secondary loss. While these grief concepts are understood as part of the author’s embodied lived experience as an individual, there is also a collective grief that is explored through the author’s bilingual experience with Arabic as it relates to the topics of suicide and genocide occurring in the Arabic-speaking diaspora located in Gaza, Palestine. A conceptual framework is offered to make sense of the author’s lived experience by both incorporating and challenging existing academic perspectives on suicide and research. The emic, or insider, perspective is contextualized such that it may hold implications beyond the individual author, such as for U.S. Muslims and other hard-to-reach populations. A positionality statement demonstrates the author’s reflexivity of being an insider ‘participant’–researcher in conducting transformative research approaches with the U.S. Muslim community. Further directions are shared for scholars with lived experience who may seek to utilize comparable individual or collaborative autoethnographic approaches with such majority-world communities. Full article

Compliant mechanisms are extensively utilized in precise positioning systems. This work presents a novel compliant fine Z-positioner for directing the indenter in a nanoindentation testing positioning system. Initially, the suggested positioner consists of a novel hybrid symmetric compliant displacement amplifier of four-lever and Scott Russell structures combined with a parallel guiding mechanism. Subsequently, a static–dynamic characteristic of the proposed positioner is modeled by the pseudo-rigid body method and the Lagrange technique. Based on the FEA results, the parasitic motion error of the developed fine Z-positioner was 0.0956%. Thirdly, the analytical result was verified by FEA analysis, and the error between the two methods was 0.5869%. Therefore, the proposed analytical approach was reliable for quickly assessing the output response of the proposed positioner. Finally, to enhance the quality of the proposed structure’s response, the main design variables of the fine Z-positioner are optimized using the Firefly algorithm. The optimal findings indicated that the first natural frequency occurs at around 220.16 Hz. The imprecision between the optimal result and the FEA result was 9.67%. The analytical results are in close agreement with the confirmed FEA result. The prototype was manufactured by the computerized numerical milling method. The inexactness between the FEA outcome and the experimentation outcome was 11.04%. Based on the FEA and experiment results, displacement amplification proportions were 6.8725 and 8, respectively. In addition, the experimental results demonstrated a good linear relationship for guiding mechanisms in nanoindentation testing positioning systems. Full article

Compared with planar layering, the morphology of spatial GMA deposition beads formed by curved layering is influenced by gravity, resulting in asymmetric and complex cross-sections. To quantitatively describe the bead orientation and cross-sectional shape, this study introduces the path inclination angle and path direction angle, along with five characteristic parameters—height, width, eccentricity, upper plumpness, and lower plumpness—using piecewise polynomial fitting for profile modeling. A full-factorial experiment was conducted to establish the relationship between deposition speed, bead spatial orientation, and cross-sectional features. The obtained fitting equation had a mean relative error of less than 2.5%, and an overlapping strategy was proposed to achieve flat, curved GMA layers. The proposed bead characterization method, parameter planning model, and overlap strategy were validated through deposition experiments on cylindrical surfaces without a positioner, providing a foundation for high-precision curved GMA additive manufacturing. Full article

This article is a response to a paper, published last year in this journal, by Grace, Nind, de Haas and Hope. The authors sought to “question how we create knowledge and challenge underlying assumptions about valid forms of knowing” (p. 3). Their focus is on inclusive research with people who have profound intellectual and multiple disabilities (PIMDs). They describe their approach as “being with”, aligned with the experience of meaning, as opposed to doing research with people, which they locate in knowledge extraction. Recognising the authors’ commitment to foregrounding the personhood of people with PIMDs, a critique is developed in order to open a debate around issues of ethical research practices, decolonisation and conceptualisation of ‘deep knowledge’. Full article

This study proposes an improved stiffness ellipsoid method to enhance the stiffness and precision of robotic arms in friction stir welding (FSW) operations. The method involves establishing a joint stiffness model through static identification experiments and developing a novel stiffness index derived from the improved stiffness ellipsoid method. This index provides a refined metric for evaluating the robot’s performance under variable loads during FSW. Simulation experiments demonstrate significant improvements in welding trajectory precision and computational efficiency. The findings highlight the potential of this method to elevate FW quality and consistency. Full article

In aerospace and new-energy vehicle manufacturing, there is an increasing demand for the high-quality joining of large, curved aluminum alloy structures. This study presents a robotic friction stir welding (RFSW) system employing a force/position hybrid control. An eight-axis linkage platform integrates an electric spindle, multidimensional force sensors, and a laser displacement sensor, ensuring trajectory coordination between the robot and the positioner. By combining long-range constant displacement with small-range constant pressure—supplemented by an adaptive transition algorithm—the system regulates the axial stirring depth and downward force. The experimental results confirm that this approach effectively compensates for robotic flexibility, keeping weld depth and pressure deviations within 5%, significantly improving seam quality. Further welding verification was performed on typical curved panels for aerospace applications, and the results demonstrated strong adaptability under high-load, multi-DOF conditions, without crack formation. This research could advance the field toward more robust, automated, and adaptive RFSW solutions for aerospace, automotive, and other high-end manufacturing applications. Full article

This article focuses on the life writing narratives of diasporic writers in Europe, such as the Italian writer of Somali descent Igiaba Scego, who, through her writing and public role, manages to create powerful interventions on issues of belonging, diversity, and creativity, contributing to a renewed understanding of gender knowledge and cultures of equalities in localized as well as global contexts. This article focuses on her role as a writer as well as a postcolonial intellectual, as she is not just a spokesperson for her community, nor simply a promotor of universal values, but someone who straddles complex positionalities in their location in imperial–colonial orders. We align ourselves with the notion of postcolonial intellectuals as those who speak truth to power on issues of cultural integration and gender equalities). In her autobiographical work titled La mia casa è dove sono, published in 2010, Scego draws a subjective map of different places inhabited by her family: Somalia, Italy, and Great Britain, contributing to the understanding of unbelonging and transnationalism through topics of migration, biculturalism, gender, race, and identity. Full article

Research about the lived experiences of asylum-seeking and refugee youth can evoke powerful emotions for those involved. Young people who escaped perilous situations often bear strong emotions linked to their experiences of migration and displacement, as well as their encounters with disorientation, insecurity, isolation, discrimination and racism in unfamiliar contexts in the host society. Such emotions and emotionally charged places can be challenging to work with as researchers and require reflexive and situated methodological and ethical judgements. This paper investigates the emotional complexities of fieldwork with vulnerable young people by reflecting on (dis)comfort and discusses how to negotiate these issues with care and consideration. It draws from qualitative participatory and creative fieldwork experiences using story mapping, photovoice, walk-along and community theatre approaches in Amsterdam, Brussels, Leipzig and Newcastle-Upon-Tyne. It reports on a range of critical ethical and methodological issues that arose in our work that address meaningful relationships, reciprocity and trust, understanding the field, positionality and reflexivity, and challenges around the co-production of knowledge and leaving the field. Throughout, the paper flags various complex and, at times, ambiguous ethical and methodological issues that emerged throughout the research process and argues for research approaches that are sensitive to the contextual and multi-faceted nature of investigating young refugees and asylum seekers in European cities. Full article

This article focuses on the health impacts of the gender-based violence (GBV) experienced by migrant and refugee women (MRW) survivors in their migration/settlement journeys in Canada, and their challenges in accessing healthcare. Adopting a feminist and intersectional lens, I draw upon qualitative in-depth interviews with 48 migrant women conducted between 2020 and 2022. GBV is a frequent experience in the migration and (re)settlement journey and has wide-ranging and cross-secting emotional-psychological, socio-economic, physical, as well as sexual and reproductive health consequences which, in turn, impact settlement and integration and may increase vulnerability to further GBV as a result. Drawing upon a “social determinants of health” approach, I aim to understand the workings of barriers to healthcare access and help seeking for MRW survivors of GBV in Canada. The social determinants of health involve structural (e.g., legal, financial, linguistic, knowledge, healthcare access) barriers, mediated by gender, intersecting with various positionalities and identities. GBV unambiguously impacts on the health and well-being of all survivors, but the extent of harm varies significantly depending on the intersections of positions and identities of survivors. The migration context entails unique barriers to MRW help seeking and healthcare access as well as aggravates the impacts of other barriers on MRW. My objective is to show how GBV affects the health status of MRW survivors in Canada in the specific context of healthcare access and help-seeking barriers MRW face, conceptualized as risk factors for reproducing GBV. Full article

Black Theology of Liberation, particularly in South Africa, has always been for Black people in the world and produced theological reflections through the lens of Black people. In the evolving scholarship on BTL, there has been challenges in its middle class positionality toward the Black poor and oppressed. The Church Land Programme in Pietermaritzburg was presented with a similar challenge on its positionality in its work on land reform. The CLP’s shift from an organisation working on behalf of the Black poor to working with them may provide suggestions for BTL’s methodology and positionality. This article analyses the Church Land Programme’s community-led publications and how these provide innovative methodological choices for Black Theology of Liberation scholars. Firstly, it explores the Church Land Programme’s history, strategic shifts, and publication partnerships within communities. Secondly, is analyses the publications’ use of stories from within communities. Finally, it discusses new methodological choices in Black Theology of Liberation through lessons from the Church Land Programme’s shift and resultant publications. The results reveal that narratives from below can be promoted in Black Theology of Liberation’s methodology. Full article