Long-Term Change Analysis of PM2.5 and Ozone Pollution in China’s Most Polluted Region during 2015–2020

In this study, a time change analysis of fine particulate (PM2.5) emission in multi-resolution emission inventory in China (MEIC) from 2013 to 2016 was conducted. It was found that PM2.5 emissions showed a decreasing trend year by year, and that the annual total emission of PM2.5 decreased by 28.5% in 2016 compared with that of 2013. When comparing the observation data of PM2.5 and ozone (O3), it was found that both PM2.5 and O3 show obvious seasonal changes. The emission of PM2.5 in autumn and winter is higher than that in summer, while that of O3 is not. Our study showed that in the 2015–2020 period, annual mean concentrations of PM2.5 and O3 in Beijing varied from 80.87 to 38.31 μg m-3 and 110.75 to 106.18 μg m-3, respectively. Since 2015, the observed value of PM2.5 has shown an obvious downward trend. Compared with 2015, the average annual PM2.5 concentrations in Beijing, Shanghai, Xuzhou, Zhengzhou, and Hefei in 2020 had decreased by 52.62%, 40.35%, 22.2%, 46.84%, and 45.11%, respectively, while O3 showed an upward trend. Compared with the annual averages of 2015 and 2020, Beijing and Shanghai saw a decrease of 4.13% and 8.46%, respectively, while Xuzhou, Zhengzhou, and Hefei saw an increase of 7.08%, 19.46%, and 41.57%, respectively. The comparison shows that PM2.5 is becoming less threatening in China and that ozone is becoming more difficult to control. Air pollution is a modifiable risk factor. Appropriate sustainable control policies are recommended to protect public health.

Curricular policies and flexibility – anathemas and beliefs

This paper discusses some issues and concepts within the current curriculum debate in both a diachronic and international perspective. Recent curriculum changes have been mostly determined by massification of student bodies, bringing into the school system a variety of social and cultural backgrounds. From the point of view of this analysis, the concept of flexibility is critical in this discussion as it explains the long‑term change of policies from 1990 on, with respect to levels of curriculum decision, namely the articulation between national level responsible for establishing the common core, and local level responsible for adapting curriculum to micro-social contexts. The author refers to this dialectic as curriculum binomial. Contributions from both curriculum research and international macro‑policies are mobilized, in order to clarify the response in our time to the classic curriculum question; What is worth to learn – and therefore to teach – in formal educational systems, so that they may meet the needs of our time, and why? In line with this problematization, we propose an analysis of Portuguese curriculum changes after the implementation of school massification (after the 1960s) and synthesize key‑concepts in international recommendations. Finally, we discuss some implications of this process for teachers and schools.

Review of Long-Term Trends in the Equatorial Ionosphere Due the Geomagnetic Field Secular Variations and Its Relevance to Space Weather

The Earth’s ionosphere presents long-term trends that have been of interest since a pioneering study in 1989 suggesting that greenhouse gases increasing due to anthropogenic activity will produce not only a troposphere global warming, but a cooling in the upper atmosphere as well. Since then, long-term changes in the upper atmosphere, and particularly in the ionosphere, have become a significant topic in global change studies with many results already published. There are also other ionospheric long-term change forcings of natural origin, such as the Earth’s magnetic field secular variation with very special characteristics at equatorial and low latitudes. The ionosphere, as a part of the space weather environment, plays a crucial role to the point that it could certainly be said that space weather cannot be understood without reference to it. In this work, theoretical and experimental results on equatorial and low-latitude ionospheric trends linked to the geomagnetic field secular variation are reviewed and analyzed. Controversies and gaps in existing knowledge are identified together with important areas for future study. These trends, although weak when compared to other ionospheric variations, are steady and may become significant in the future and important even now for long-term space weather forecasts.

Monitoring Arthropods in Azorean Agroecosystems: the project AGRO-ECOSERVICES

The data we present are part of the AGRO-ECOSERVICES project (Assessing ecosystem services and disservices provided by arthropod species in Azorean agroecosystems). The project aims to evaluate the relative importance of native and non-native organisms as ecosystem services (ES) and disservices (ED) providers, by combining novel, direct and quantitative tools for monitoring agro-biodiversity. Ecosystem services include evaluation of natural pest control by predation, seed predation on weed plants, pollination, decomposition and ecosystem disservices, herbivory and seed predation on crop plants. Active Aerial Searching (AAS) (only in maize-fields) and pitfall traps were used to sample the arthropod biodiversity (predatory spiders, true-bugs and beetles and main insect pests) on four agricultural habitats of Terceira Island, namely citrus orchards, low and high elevation maize fields and vineyards. We provided an inventory of all arthropods recorded in four Azorean agroecosystems (citrus orchards, low and high elevation maize fields and vineyards) from Terceira Island. A total of 50412 specimens were collected, belonging to four classes, 20 orders, 81 families and 200 identified species of arthropods. A total of 127 species are considered introduced (n = 22646) and 69 native non-endemic (n = 24117). Four endemic species were recorded with very few specimens (n = 14) and 3635 specimens belong to unidentified taxa recorded only at genus or family level. Five species are new records for Terceira Island, with Lagria hirta (Linnaeus, 1758) (Coleoptera, Tenebrionidae) being also a new record for the Azores. This publication contributes to a better knowledge of the arthropods communities present in agro-ecosystems of Terceira Island and will serve as a baseline for future monitoring schemes targeting the long-term change in arthropod diversity and abundance.

'Ni Una Menos': A women's social movement contesting gender-based violence in Arequipa, Peru

<p>Ni Una Menos (NUM) is a social movement that since 2015 has spread through Latin America as a response to continuing problems of femicides and gender-based violence. NUM challenges gender power relations embedded in the machista culture, which top-down approaches within mainstream gender and development approaches (GAD) have overlooked. To date, most studies of NUM have focused on the movement in Argentina, and its major public actions. Few studies have sought a holistic understanding of how the movement contests Gender Based Violence (GBV) on a day-to-day basis. This research involved a case study of the NUM movement in Arequipa, Peru. I undertook a mixed methods approach, placing this in context of GAD and social movement theories. I worked with NUM Arequipa activists to understand the movement and its strategies in the local context; and with students to explore their knowledge about, and response to, NUM Arequipa’s strategies. NUM Arequipa practised two forms of activism. The first - ‘traditional’ activism’, raised awareness and challenged machista sociocultural structures through media, public campaigns and education. These strategies complemented international GAD practice by challenging unequal gender relationships and incorporating male participation. The second - ‘quiet’ or ‘everyday’ activism - focused on providing support and advocacy for victims of GBV, and a commitment to empathy, care and justice. For both types of strategies, social media and connections to local organisations were important. However, NUM Arequipa, with its non-feminist public identity and quiet activism, found challenges distinguishing itself from other ‘loud’ feminist NUM groups. This confusion meant that students had limited awareness of NUM Arequipa’s specific activities and achievements. The thesis concludes that grassroots movements like NUM Arequipa, alongside more explicitly feminist and confrontational forms of social movements, are essential to eradicating GBV because they can work through relationships to make short-term change in people’s lives while also challenging patriarchal and machista structures in ways that are sensitive to the sociocultural context.</p>

The AI ethicist’s dilemma: fighting Big Tech by supporting Big Tech

Assume that a researcher uncovers a major problem with how social media are currently used. What sort of challenges arise when they must subsequently decide whether or not to use social media to create awareness about this problem? This situation routinely occurs as ethicists navigate choices regarding how to effect change and potentially remedy the problems they uncover. In this article, challenges related to new technologies and what is often referred to as ‘Big Tech’ are emphasized. We present what we refer to as the AI ethicist’s dilemma, which emerges when an AI ethicist has to consider how their own success in communicating an identified problem is associated with a high risk of decreasing the chances of successfully remedying the problem. We examine how the ethicist can resolve the dilemma and arrive at ethically sound paths of action through combining three ethical theories: virtue ethics, deontological ethics and consequentialist ethics. The article concludes that attempting to change the world of Big Tech only using the technologies and tools they provide will at times prove to be counter-productive, and that political and other more disruptive avenues of action should also be seriously considered by ethicists who want to effect long-term change. Both strategies have advantages and disadvantages, and a combination might be desirable to achieve these advantages and mitigate some of the disadvantages discussed.