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In this paper, I examine the emergence of discourses on the indigenous during the postrevolutionary period in México (1920–1940), focusing on the Lake Pátzcuaro region, an iconic national landscape, and an indigenous region in central west México. Understood in terms of practice, this paper uses landscape as a lens to examine questions of identity, discourse, and power, emphasising its relational, constructed nature. It focuses on the set of discursive practices known as indigenismo. The central idea posed in this paper is that although postrevolutionary indigenismo served as a tool for governance, it also provided a language for the indigenous people to articulate their demands, enabling the articulation of indigenous identities. [ABSTRACT FROM AUTHOR]

This paper explores the configuration of families between humans and companion animals, focusing on the shifting domestic dynamics and the rise of pet families in urban milieus. These configurations represent characteristic ways of living in the context of youth middleclass sectors in the 21st century. At a methodology level, we conducted a survey, 27 in-depth interviews, and a review of 3,000 profiles on social networks and dating apps of youth users from Buenos Aires and Mexico City. Over the past decades, family subjectivation devices have undergone a global transformation. While these changes coexist with classical arrangements, especially in large cities, there is an increasing prevalence of affective bonds, forms of cohabitation, economic agreements, vital commitments, and even decisions regarding having or not having children that overflow the historical meanings of the family. Therefore, the construction of analyses such as "ways of living together" seeks to decenter the family configuration as the sole matrix of analysis by linking these practices with broader transformations that can be contemplated within the realm of "the common." [ABSTRACT FROM AUTHOR]

Some drivers push for a transition towards sustainable and integrated urban water management while involving the community in decision-making. The Transition Management framework has been used to study how to empower experiments and promote sustainable transitions. However, there is no proper recognition of how to involve the community as part of the transition processes, especially in developing countries. This paper analyses the 2007–2012 Magdalena River restoration project in Mexico City to understand community participation in water management transitions, while recognising how different social groups are involved and react to transition experiments. This research points out the difficulties that influence community participation and the necessity of addressing these difficulties while considering the heterogeneous community character. [ABSTRACT FROM AUTHOR]

Museums are platforms that empower us to bring civilization to a higher level; they exist to expand our understanding of human history and preserve the heritage. At the turn of the century, two young Mexican women, Sharon Zaga and Mily Cohen, had the unbelievable dream of building a museum of memory and tolerance in Mexico City. This discussion paper explores how the exhibitions of human intolerance at Museo Memoria y Tolerancia in Mexico City can change societal attitudes toward tolerance and historical memory. As a result, this place became not just a museum, but a place going beyond the idea of a museum and art, telling its visitors about the importance of historical memory, showcasing genocides, and ultimately touching on the importance of tolerance. [ABSTRACT FROM AUTHOR]

Propolis tinctures are popular alternative medicines, but mandatory labeling requirements relating to the inorganic content or percentage of ethanol are absent. Knowing the elemental content is useful for quality assurance/quality control of the tinctures between batches, as well as the safety of the products for consumers. Microwave plasma – atomic emission spectrometry (MP-AES) is a relatively low-cost, robust, multielemental technique that can analyze ethanolic extracts of propolis following minimum sample preparation. However, there are no published papers using MP-AES for this application. The technique was evaluated for the determination of sixteen elements in lab-made preparations and in 23 products from markets in Mexico. The matrix effects of the ethanol content of the samples were also evaluated and were found to affect the detection limit of some elements. There was high variability in the elemental composition of the major (K, Fe, Mg, and Na) and minor (Al, Cd, Co, Cr, Cu, Mn, Ni, and Zn) elements among the samples. The median concentrations of cadmium, and lead in the propolis tinctures were below 0.28 µg·L−1 and 2.8 µg·L−1, respectively. [ABSTRACT FROM AUTHOR]

This paper studies Latin American sport from an International Relations perspective. Considering that systemic imperatives are overlooked in most sports studies and that power is not conceived as a comprehensive element that drives state action, the focus here is to study the relationship between the international power structure and sports performance, analysing the correlation between the World Power Index (WPI) and the medal table of the Pan-American Games from the edition of Mexico City 1975 to Lima 2019. The results show that there is a positive and strong correlation in the different periods of time evaluated, but even with that, we do not defend that there is an automatic conversion of national power into the medal tables at the Pan-American Games. In conclusion, this article argues that from International Relations, the International Structure configures the medal plans of countries, namely, where they want to be positioned in the final rankings, which in the end, shapes the medal table of sports competitions. [ABSTRACT FROM AUTHOR]

How were solidarity campaigns transnationally organized and locally performed? To answer this question, this paper examines anti-imperialist solidarity campaigns and their role in the politics of Mexico City in the 1920s. The paper analyzes two political movements: the campaign against the conviction of the Italian-American anarchists Sacco and Vanzetti in the United States and the campaign in solidarity with rebel general Augusto César Sandino who fought against US troops in his native Nicaragua. Transnational solidarity campaigns, it is argued, were an important link between local radical activism and global movements as solidarity had to be performed locally and envisioned globally. Demonstrations, economic boycotts, and public fundraising campaigns were means to perform solidarity in the city, linking local activism to the global anti-imperialist movement. With the example of activism in Mexico City in the post-revolutionary 1920s, this paper analyzes performative and ideological change over time and how the asymmetric potential of localization and globalization affect transnational solidarity campaigns. [ABSTRACT FROM AUTHOR]

This article explores the circulation of the terms lesbiana and queer (cuir) in Mexico City. More particularly, I discuss how de ambiente and la diversidad sexual, which capture the spirit of queer politics, predominated in the 1990s and early 2000s, to be surpassed by lesbiana in the 2010s, in lesbian communities. While the circulation of lesbiana parallels, permeates, and impregnates cuir genealogies too, I suggest here that its continuity, and stronger resurgence in the 2010s, relates to acute attention to structural violence in the region, particularly in the face of feminicides. At such moment young activists "twist" lesbiana genealogies to give place to new terms such as lesboterrorism. I pay particular attention to lesboterrorismo, a new theoretical formulation young activists developed in the midst of militarization, gore capitalism, and graphic violence against women's bodies. This paper is informed by ethnographic fieldwork I have conducted since 2000, including participant observation, 40 qualitative interviews with women participating in lesbian spaces in Mexico City, and the review of newspapers. [ABSTRACT FROM AUTHOR]

Many of the gases released by industrial processes pollute the environment and are largely responsible for climate change. Also, large amounts of low-temperature waste heat are generated by the industrial sector in different production processes. The waste heat can be recovered and reincorporated into the industrial process by means of an Absorption Heat Transformer (AHT), to reduce greenhouse gas emissions, reduce the consumption of fossil fuels, and increase energy savings. Therefore, three important aspects of the AHT are emphasized in this paper: first, the thermodynamics parameters of the AHT that influencing in its performance, second, heat recovery study and third CO2 emissions avoided analysis. For this purpose, a thermodynamic model was implemented for AHT using two working mixtures, namely, LiBr- H2O and Carrol-H2O. Besides, a heat recovery study was carried out considering the Mexican textile industry as a case study, to determine the stages of the textile process in which it is possible to return the recovered heat, as well as the best location to install an AHT. The results show that the Coefficient of Performance values increase when the absorber thermal levels range from 100 to 150°C, source temperatures from 80 to 90°C and condensation temperature from 25 to 30°C. The study of heat recovery in the textile industry describes that it is possible to install an AHT at five states in Mexico, with the potential to recover and return heat in 6 of the 7 stages of the textile process, it was also determined that with the Carrol-water mixture it is possible to obtain higher thermal levels in the absorber and recover more heat than with the water/lithium bromide mixture. The emissions analysis showed that the technology is environmentally sustainable by avoiding up to 119 tonnes of CO2eq per year into the atmosphere. [ABSTRACT FROM AUTHOR]

In the context of decreasing food security, and as part of the '100 Resilient Cities' group, Mexico City (CDMX) has committed itself to achieving resilience through local food systems, green infrastructure and ecosystem services development. This paper reports on two surveys mapping the distribution of species of edible plants growing in publicly accessible interstitial spaces (e.g. central reservations and pavements) in subtropical, central CDMX. It also reports on an initial assessment of the feasibility of using such spaces for foraging. Rather than improving everyday food supplies, the maintenance of these spaces as areas for emergency foraging would ideally increase urban resilience in the face of extreme food supply shocks. The surveys used a direct species identification approach whilst walking ∼20 km of streets and identified thirty-six species of edible plants including not only fruits and herbs, but also vegetables. The results permitted the satisfactory assessment of three out of five feasibility conditions: (i) suitable growing conditions, (ii) provisioning capability and (iii) the existence of multiple plant dispersal pathways (including both natural processes and deliberate planting, as well as, more speculatively, unintentional human-mediated dispersal). Two other important feasibility conditions for foraging – (iv) usage and (v) a favourable planning environment – were not able to be judged based on the field data. CDMX promotes the planting of fruit trees in avenues, but this paper shows that local socio-ecological systems sustain a greater variety of edibles growing in a wider range of interstitial spaces. Ignoring this would represent a missed opportunity for urban resilience. [ABSTRACT FROM AUTHOR]

In this research, the response of high voltage transmission towers under wind load patterns is discussed from the point of view of structural reliability. The paper focuses the attention on the response of two existing tension towers that are part of the 400 kV circuit at the perimeter of Mexico City. Two hundred nonlinear pushover analyses were carried out in detailed models in order to study peak demands in the critical structural elements in tension, compression and in the critical support to establish the vulnerability as a function of the: i) variability of the lateral load pattern and ii) the material overstrength from commercial profiles available in the local market. Based on the results, the global buckling of the elements in the mid-height led to a fragile collapse mechanism, regardless of the applied loading profile. This observation represents a research opportunity in the design practice for the existing towers. The study identifies a dependency between the collapse mechanism and the structure height, which is not currently considered by the specialized codes. [ABSTRACT FROM AUTHOR]

Walking for transportation is a common and accessible means of achieving recommended physical activity levels, while providing important social and environmental co-benefits. Even though walking in rapidly growing urban areas has become especially challenging given the increasing dependence on motorised transportation, walking remains a major mode of transportation in Latin American cities. In this paper we aimed to quantify self-reported walking for transportation in Mexico City, Bogota, Santiago de Chile, Sao Paulo, and Buenos Aires, by identifying both walking trips that are conducted entirely on foot and walking events involved in trips mainly conducted on other means of transportation (e.g. private vehicle, public transit) among individuals ≥5-years old. We show how walking-only trips account for approximately 30% trips in the analysed cities, and we evidence how the pedestrian dimension of mobility is largely underestimated if walking that is incidental to other transportation modes is not accounted for: when considering all walking events, we observed an increase between 73% and 217% in daily walking time. As a result, we estimated that between 19% and 25% of residents in these cities meet the WHO physical activity guidelines solely from walking for transportation. The results of the study also suggest that the promotion of public transportation in large Latin American cities can especially help certain population groups achieve the daily recommended levels of physical activity, while among low-income groups accessibility and safety seem to be the key challenges to be addressed. [ABSTRACT FROM AUTHOR]

The COVID19 pandemic wreaked havoc on the arts, particularly the performing arts, where live audiences are an important part of the creative process. In spite of the immense roadblocks created by this crisis, artists around the world began to shift their craft online. No where do we see a more rapid shift than in Mexico City, propelled in part by the theater department at the Universidad Nacional Autónoma de México. This paper will look at the ways in which small theater companies were able to move their current productions online in the weeks following the shutdown, and how they evolved over the course of 2020 and into 2021, innovating and creating new digital-theatrical spaces via platforms like Zoom, YouTube, and Facebook live. [ABSTRACT FROM AUTHOR]

Heteromeyenia is an important genus of freshwater sponges characterized mainly by the presence of microscleres acanthoxeas. So far, two species are known from Mexico; H. baileyi and H. latitenta. In this paper, we redescribed H. latitenta and described the new species Heteromeyenia riojai sp. nov. from a morphological and molecular perspective. The main morphological characteristic of H. latitenta is the foraminal aperture of the gemmule, which is a prolonged tube, from which flattened cirrous appendages extend laterally; a characteristic absent in H. riojai sp. nov., which bears a short and slightly elevated foramen. The new species is distinguished by having acanthoxeas with fusiform to knobbed tips, gemmuloscleres in a single category, which are radially embedded in the theca of the gemmule. Due to the similarity in the form, size of the spicules, and geographic distribution of H. riojai sp. nov., and H. baileyi sensu Rioja, we considered that the Rioja's records must be assigned to the new species. We also aim to establish the phylogenetic relationships of the genus through nuclear-ribosomal molecular markers ITS2. Tree topology showed the Heteromeyenia species clustered together in a robust clade and closer to Corvomeyenia sp. (family Metaniidae) than to other Spongillidae genera. Our results support the previous molecular hypothesis, which strongly suggests the polyphyly of Spongillidae, even more in genera as Heteromeyenia and Trochospongilla, which displayed a large genetic distance with the other members of Spongillida. [ABSTRACT FROM AUTHOR]

The seismic response of structures to strong ground motions is a complex problem that has been studied for decades. However, current seismic regulations do not assess the potential level of damage that a structure may undergo during a given seismic event. This will happen in spite that the design objectives for any structural system are formulated in terms of acceptable levels of damage. This paper develops simple expressions to estimate plastic energy demands for soft soil sites (particularly, those located in Mexico City) capable of generating long duration narrow-banded ground motions. To overcome the limited scope of previous studies, about 35,000 seismic simulations were performed using two scaling methodologies: linear and seismological. A new simplified relation between plastic hysteretic energy and maximum ductility demands is presented, and also, a discussion offered on how this relation can be used to allow for an energy-based design aimed at controlling structural damage under the explicit consideration of low cycle fatigue. [ABSTRACT FROM AUTHOR]