Controlling land they call their own: access and women's empowerment in Northern Tanzania

Formal rights to land are often promoted as an essential part of empowering women, particularly in the Global South. We look at two grassroots non-governmental organizations (NGOs) working on land rights and empowerment with Maasai communities in Northern Tanzania. Women involved with both NGOS attest to the power of land ownership for personal empowerment and transformations in gender relations. Yet very few have obtained land ownership titles. Drawing from Ribot and Peluso’s theory of access, we argue that more than ownership rights to land, access–to land, knowledge, social relations and political processes–is leading to empowerment for these women, as well as helping to keep land within communities. We illustrate how the following are key to both empowerment processes and protecting community and women’s land: (1) access to knowledge about legal rights, such as the right to own land; (2) access to customary forms of authority; and (3) access to a joint social identity–as women, as indigenous people, and as Maasai. Through this shared identity and access to knowledge and authority, women are strengthening their access to social relations (amongst themselves, with powerful political players and NGOs), and gaining strength through collective action to protect land rights

Controlled Magnetic Anisotropy in Single Domain Mn-doped Biosynthesized Nanoparticles

Magnetotactic bacteria Magnetospirillum gryphiswaldense synthesize cubo-octahedral shaped magnetite nanoparticles, called magnetosomes, with a mean diameter of 40 nm. The high quality of the biosynthesized nanoparticles makes them suitable for numerous applications in fields like cancer therapy, among others. The magnetic properties of magnetite magnetosomes can be tailored by doping them with transition metal elements, increasing their potential applications. In this work, we address the effect of Mn doping on the main properties of magnetosomes by the combination of structural and magnetic characterization techniques. Energy-dispersive X-ray spectroscopy, X-ray absorption nearedge structure, and X-ray magnetic circular dichroism results reveal a Mn dopant percentage of utmost 2.3%, where Mn cations are incorporated as a combination of Mn2+ and Mn3+, preferably occupying tetrahedral and octahedral sites, respectively. Fe substitution by Mn notably alters the magnetic behavior of the doped magnetosomes. Theoretical modeling of the experimental hysteresis loops taken between 5 and 300 K with a modified Stoner-Wohlfarth approach highlights the different anisotropy contributions of the doped magnetosomes as a function of temperature. In comparison with the undoped magnetosomes, Mn incorporation alters the magnetocrystalline anisotropy introducing a negative and larger cubic anisotropy down to the Verwey transition, which appears shifted to lower temperature values as a consequence of Mn doping. On the other hand, Mn-doped magnetosomes show a decrease in the uniaxial anisotropy in the whole temperature range, most likely associated with a morphological modification of the Mn-doped magnetosomes.The Spanish and Basque Governments are acknowledged for funding under project numbers MAT2017- 83631-C3-R and IT-1245-19, respectively

An Age-Structured Extension to the Vectorial Capacity Model

Vectorial capacity and the basic reproductive number (R(0)) have been instrumental in structuring thinking about vector-borne pathogen transmission and how best to prevent the diseases they cause. One of the more important simplifying assumptions of these models is age-independent vector mortality. A growing body of evidence indicates that insect vectors exhibit age-dependent mortality, which can have strong and varied affects on pathogen transmission dynamics and strategies for disease prevention.Based on survival analysis we derived new equations for vectorial capacity and R(0) that are valid for any pattern of age-dependent (or age-independent) vector mortality and explore the behavior of the models across various mortality patterns. The framework we present (1) lays the groundwork for an extension and refinement of the vectorial capacity paradigm by introducing an age-structured extension to the model, (2) encourages further research on the actuarial dynamics of vectors in particular and the relationship of vector mortality to pathogen transmission in general, and (3) provides a detailed quantitative basis for understanding the relative impact of reductions in vector longevity compared to other vector-borne disease prevention strategies.Accounting for age-dependent vector mortality in estimates of vectorial capacity and R(0) was most important when (1) vector densities are relatively low and the pattern of mortality can determine whether pathogen transmission will persist; i.e., determines whether R(0) is above or below 1, (2) vector population growth rate is relatively low and there are complex interactions between birth and death that differ fundamentally from birth-death relationships with age-independent mortality, and (3) the vector exhibits complex patterns of age-dependent mortality and R(0) ∼ 1. A limiting factor in the construction and evaluation of new age-dependent mortality models is the paucity of data characterizing vector mortality patterns, particularly for free ranging vectors in the field

Forest Biodiversity Assessment in Peruvian Andean Montane Cloud Forest

Cloud forests are unusual and fragile habitats, being one of the least studied and least understood ecosystems. The tropical Andean dominion is considered one of the most significant places in the world as rega rds biological diversity, with a very high level of endemism. The biodiversity was analysed in an isolated remnant area of a tropical montane cloud forest known as the ?Bosque de Neblina de Cuyas?, in the North of the Peruvian Andean range. Composition, structure and dead wood were measured or estimated. The values obtained were compared with other cloud forests. The study revealed a high level of forest biodiversity, although the level of biodiversity differs from one area to another: in the inner areas, where human pressure is almost inexistent, the biodiversity values increase. The high species richness and the low dominance among species bear testimony to this montane cloud forest as a real enclave of biodiversity

Amicus curiae on the request for consultative opinion formulated by the American Commission on Human Rights about Differentiated Approaches Regarding Persons Deprived of Liberty

These are reasons for amicus curiae presented to the Inter-American Court of Human Rights by the Center for Studies in Human Rights Systems and the Clinic for Access to Justice and Education in the Prisons of the Federal University of Paraná, on the occasion of the Request for Advisory Opinion (OC) number 29 formulated by the American Commission of Humans to the Inter-American Court, on different approaches to the matter of persons deprived of their liberty. The play is part of the context of the pandemic of COVID-19, which heightened vulnerabilities and subjected the prison population as a whole to a framework of hyper vulnerability, given the sanitary measures that imply reduced rights and weakened means of enforcement. Still, it advances on other contexts of overlapping vulnerabilities, such as concerning transgender women, the LGBTQI + public, pregnant women, breastfeeding women, and those accompanied by children in prison. Finally, the absence of the OC about other vulnerabilities not explicitly listed by the request of the IACHR, such as persons with disabilities deprived of liberty, with special emphasis on visual impairments and cases of need for use of wheelchairs with special needs, should be addressed.Trata-se de razões de amicus curiae apresentadas à Corte Interamericana de Direitos Humanos pelo Núcleo de Estudos em Sistemas de Direitos Humanos e Clínica de Acesso à Justiça e Educação nas Prisões da Universidade Federal do Paraná, por ocasião da Solicitação de Opinião Consultiva (OC) número 29 formulada pela Comissão Americana de Humanos à Corte Interamericana, sobre enfoques diferenciados em matéria de pessoas privadas de liberdade. A peça parte do contexto da pandemia da COVID-19 que aguçou vulnerabilidades e sujeitou a população carcerária como um todo a um quadro de hipervulnerabilidade, diante das medidas sanitárias que implicam em redução de direitos e em fragilização dos meios de fiscalização. Ainda, avança sobre outros contextos de vulnerabilidades superpostas como em relação às mulheres transgênero, o público LGBTQI+, mulheres gestantes, lactantes e acompanhadas de crianças no cárcere. Por fim, ataca-se as ausências da solicitação de OC em relação à outras vulnerabilidades não elencadas explicitamente pela solicitação da CIDH, como é o caso de pessoas com deficiência privadas de liberdade, com especial ênfase à deficiência visual e aos casos de necessidade de uso de cadeiras de rodas que necessitam de cuidados específicos e inexistentes no sistema penitenciário

The genetic architecture of the human cerebral cortex

The cerebral cortex underlies our complex cognitive capabilities, yet little is known about the specific genetic loci that influence human cortical structure. To identify genetic variants that affect cortical structure, we conducted a genome-wide association meta-analysis of brain magnetic resonance imaging data from 51,665 individuals. We analyzed the surface area and average thickness of the whole cortex and 34 regions with known functional specializations. We identified 199 significant loci and found significant enrichment for loci influencing total surface area within regulatory elements that are active during prenatal cortical development, supporting the radial unit hypothesis. Loci that affect regional surface area cluster near genes in Wnt signaling pathways, which influence progenitor expansion and areal identity. Variation in cortical structure is genetically correlated with cognitive function, Parkinson's disease, insomnia, depression, neuroticism, and attention deficit hyperactivity disorder

A Realistic Roadmap to Formation Flying Space Interferometry

The ultimate astronomical observatory would be a formation flying space interferometer, combining sensitivity and stability with high angular resolution. The smallSat revolution offers a new and maturing prototyping platform for space interferometry and we put forward a realistic plan for achieving first stellar fringes in space by 2030