Infrastructure development is central to the processes that abate and produce vulnerabilities in cities. Urban actors, especially those with power and authority, perceive and interpret vulnerability ...and decide when and how to adapt. When city managers use infrastructure to reduce urban risk in the complex, interconnected city system, new fragilities are introduced because of inherent system feedbacks. We trace the interactions between system dynamics and decision-making processes over 700 years of Mexico City’s adaptations to water risks, focusing on the decision cycles of public infrastructure providers (in this case, government authorities). We bring together two lenses in examining this history: robustness-vulnerability trade-offs to explain the evolution of systemic risk dynamics mediated by feedback control, and adaptation pathways to focus on the evolution of decision cycles that motivate significant infrastructure investments. Drawing from historical accounts, archeological evidence, and original research on water, engineering, and cultural history, we examine adaptation pathways of humans settlement, water supply, and flood risk. Mexico City’s history reveals insights that expand the theory of coupled infrastructure and lessons salient to contemporary urban risk management: (1) adapting by spatially externalizing risks can backfire: as cities expand, such risks become endogenous; (2) over time, adaptation pathways initiated to address specific risks may begin to intersect, creating complex trade-offs in risk management; and (3) city authorities are agents of risk production: even in the face of new exogenous risks (climate change), acknowledging and managing risks produced endogenously may prove more adaptive. History demonstrates that the very best solutions today may present critical challenges for tomorrow, and that collectively people have far more agency in and influence over the complex systems we live in than is often acknowledged.
Experiments to create spaces for social-ecological transformation are multiplying. These experiments aim at transcending traditional spaces for rational deliberation, planning, and participatory ...decision-making. We present a methodological approach for triggering the emergence of "transformation laboratories" (T-labs), which are participatory spaces where new agency is activated in relation to a stagnant sustainability challenge to generate intentional bottom-up transformations. We applied a set of participatory research tools to elicit current perceptions and foster personal involvement in transforming the ongoing urbanization of a culturally and ecologically significant historical wetland in Mexico City. Given that the emergence of T-labs as genuine bottom-up transformative spaces involves changes at multiple levels (individual, collective, and social-ecological), our approach was designed to promote a safe space that stimulates openness and personal interaction. We posit that through enabling participants to reformulate their connections to the system, to others in the system, and to themselves, the system may be transformed from the inside out. We argue that transformation, in this sense, is essentially about how changes in perception about one's own role in the system's dynamics translate into changes in agency. Our T-lab brought in 19 agents involved in the use and management of the Xochimilco urban wetland. Through a set of research tools, we elicited and presented information that helped agents to see their social-ecological position and role and to identify the practices they share with others within specific social networks and spaces of action. We argue that the process of collaboration initiated by our application of these tools and communication of their results are key for advancing initiatives that seek to create conditions for endogenous transformations.
The functions of cultural beliefs are often opaque to those who hold them. Accordingly, to benefit from cultural evolution's ability to solve complex adaptive problems, learners must be credulous. ...However, credulity entails costs, including susceptibility to exploitation, and effort wasted due to false beliefs. One determinant of the optimal level of credulity is the ratio between the costs of two types of errors: erroneous incredulity (failing to believe information that is true) and erroneous credulity (believing information that is false). This ratio can be expected to be asymmetric when information concerns hazards, as the costs of erroneous incredulity will, on average, exceed the costs of erroneous credulity; no equivalent asymmetry characterizes information concerning benefits. Natural selection can therefore be expected to have crafted learners' minds so as to be more credulous toward information concerning hazards. This negatively-biased credulity extends general negativity bias, the adaptive tendency for negative events to be more salient than positive events. Together, these biases constitute attractors that should shape cultural evolution via the aggregated effects of learners' differential retention and transmission of information. In two studies in the U.S., we demonstrate the existence of negatively-biased credulity, and show that it is most pronounced in those who believe the world to be dangerous, individuals who may constitute important nodes in cultural transmission networks. We then document the predicted imbalance in cultural content using a sample of urban legends collected from the Internet and a sample of supernatural beliefs obtained from ethnographies of a representative collection of the world's cultures, showing that beliefs about hazards predominate in both.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Abstract Moral judgment is influenced by both automatic and deliberative processing systems, and moral conflict arises when these systems produce competing intuitions. We investigated the role of ...emotional arousal in inhibiting harmful action in a behavioral study of utilitarian tradeoffs in a 3D digital simulation of two classic “trolley” scenarios in which participants decided whether to harm one person in order to avert harm to five others. Physiological arousal was measured via skin conductance response in real time. Results showed that physiological arousal is increased in situations in which using personal harm is necessary to achieve a utilitarian outcome relative to when the same outcome can be achieved with impersonal harm, and is linked to a decreased likelihood of engaging in harmful action, though a test of mediation was not statistically significant. In addition, when the use of personal harm was required to save lives, arousal was higher pre -action relative to post -action. Overall, our findings suggest that physiological arousal may be part of an affective system that functions to inhibit harmful action against others.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
Adaptation is a main response to climate change that involves adaptive, but also developmental and transformative, socio-ecological change. From this perspective the politics of climate adaptation ...cannot be understood without considering their intersection, in particular contexts, with politics of development and transformation. These three types of politics differ in the pattern of socio-ecological change that each one promotes. We discuss the operations of power associated with each pattern of change, including the forms of authority and subjectivities that each one entails. Developmental authority achieves consent (or consensus) on a trajectory of improvement, and promotes subjectivities based on individuals’ positions and their progress along that trajectory. Adaptation authority sets clear-cut boundaries between the adapting systems and their changing environments, and promotes subjectivities of belonging (or not) to the system’s identity. Transformational authority seeks to transgress established authority, be it developmental or adaptive, and promotes emancipatory subjectivities. We analyze life-story narratives of local tourism entrepreneurs and workers in Akumal, a coastal enclave in Mexico doubly exposed to hurricanes and tourism globalization. This analysis shows how the operations of power in this enclave are variously linked to discourses and practices of development, adaptation, and transformation. The case of Akumal illustrates the complex interplay between risk and inequality in coastal communities exposed to growing climatic variability. Our analysis of deliberate transformations takes adaptation to climate change, and its transformative and emancipatory potential, into development. Understanding how authority and subjectivities evolve in particular locales, and the types of politics of change that they entail, is key for simultaneously reducing inequalities and risk.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
The structural failure of a flexible pavement occurs when the accumulated fatigue damage produced by all the vehicles that have passed over each section exceeds a certain threshold. For this reason, ...the service life of pavement can be predicted in terms of the damage caused by the passage of a single standard axle and the expected evolution of traffic intensity (measured in equivalent standard axles) over time. In turn, the damage caused by the passage of an axle depends on the vertical load exerted by the wheels on the pavement surface, as given by the technical standard in application, and the depths and mechanical characteristics of the layers that compose the pavement section. In all standards currently in application, the unevenness of the road surface is disregarded. Therefore, no dynamic effects are taken into consideration and the vertical load is simply given in terms of the static weight carried by the standard axle. However, it is obvious that the road profile deteriorates over time, and it has been shown that the increase in the pavement roughness, when considered, gives rise to important dynamic effects that may lead to a dramatic fall in the expected structural service life. In this paper, we present a mathematical formulation for the fatigue analysis of flexible pavements that includes the effects of dynamic axle loading. A pavement deterioration model simulates the sustained growth of the IRI (International Roughness Index) over time. Time is discretized in successive time steps. For each time step, a road surface generation model provides a profile that renders the adequate value of the IRI. A QHV (Quarter Heavy Vehicle) model provides the dynamic amplification function for the loads exerted on the road surface along a virtual ride. This function is conveniently averaged, what gives the value of the so-called effective dynamic load amplification factor (DLA); this is the ratio between the effective dynamic loading and the static loading at each time step. Finally, the damage caused by the passage of the standard axle can be evaluated in terms of the dynamic loading. The product of this damage times the number of equivalent standard axles gives the total fatigue damage produced in the time step. The accumulated fatigue damage at each moment is easily computed by just adding up the damage produced in all the previous time steps. The formulation has been implemented in the software DMSA (Dynamic & Maintenance Simulation App). This tool has been specifically developed for the evaluation of projects in applications for financing submitted to the European Investment Bank (EIB). DMSA allows for quantifying the expected structural service life of the pavement taking into account both the rise of the dynamic axle loads exerted by the traffic as the road profile deteriorates over time and the different preventive maintenance strategies to be taken into consideration.
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FZAB, GIS, IJS, IZUM, KILJ, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBMB, UL, UM, UPUK
Experts, government officials, and industry leaders concerned about the sustainability of shrimp aquaculture believe they know what farmers need to know and should be doing. They have framed ...sustainability as a technical problem that, at the farm level, is to be solved by better shrimp and management of ponds and businesses. Codes of conduct, standards, and regulations are expected to bring deviant practices into line. Shrimp farmers are often cornered in a challenging game of knowledge in which their livelihoods are at stake. In the commodity chain there are multiple relations with both suppliers and buyers, not all of which are trustworthy. The social networks shrimp farmers belong to are crucial for sifting out misinformation and multiplying insights from personal experience in learning by doing. Successful farmers become part of a learning culture through seminars, workshops, and clubs in which knowledge and practices are continually re-evaluated. The combination of vertical and horizontal relationships creates a set of alternative arenas that together are critical to bridging knowledge and action gaps for shrimp farmers. Government and industry initiatives for improving links between knowledge and practice for sustainability have largely succeeded when incentives are aligned: shrimp grow better in healthy environments, and using fewer resources means higher profits.
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BFBNIB, NMLJ, NUK, PNG, SAZU, UL, UM, UPUK
We explore how loss of livelihood, loss of ecological function, and loss of group identity are linked in the process of social-ecological change through the narratives of stakeholders associated with ...the wetland of Xochimilco in Mexico City. Drawing from interviews, focus groups, and participatory workshops with a variety of residents and city administrators, we analyze narratives about what is valued, what is problematized, and what social and ecological relationships appear as critical from the perspective of contemporary residents and officials. Loss is prominent in these narratives, capturing the interdependence of ecology, identity, meaning, and livelihood for the inhabitants. We trace these narratives to the historical roots of center-periphery politics of land and water use, situating the current dynamic context within the social-ecological system's long pathway of change. Diffuse blame for social-ecological change expressed in the narratives appears to inhibit collective action, as does a conflicted history of local response to the city's control of resources. We posit that finding a sustainable pathway forward may depend in part on how residents are able to cognitively or emotionally accommodate landscape change while still enabling the values they have come to associate with the landscape. Such accommodation may entail accepting some degree of loss in system function and structure, but this loss may also provide opportunities for new social-ecological relations that enable the persistence of local identity.
ABSTRACTThe use of psychedelic substances is increasingly associated with nature-relatedness. We explore whether entheogenic uses of ayahuasca in settings co-produced between Indigenous and Western ...knowledges may also foster relationality and sustainability transformations across ontology, praxis, and epistemology. A survey with 74 English-speaking individuals who attended Amazonian healing ceremonies at the Takiwasi Center in Peru, along with 11 semi-structured interviews and a discussion circle revealed unexpected personal shifts towards relationality. Beyond the expected increase in nature-relatedness, participants also reported boundary dissolution and changes in their perceptions of self, leading them to experience nature and non-human beings as having spiritual or human-like agency. The blurring of perceived boundaries between themselves and nature also challenged the materialist ontologies in which they had been educated and socialized. In terms of both epistemologies and praxis, co-produced ayahuasca ceremonies enhanced relational thinking and embodiment of relationality. Inner-outer transformations ensued from the post-ceremonial integration of the ‘plant’s teachings’ into participants’ daily lives. We discuss our findings’ contributions to the emerging field of inner transformations and the relational turn in sustainability. Potential sustainability benefits of scaling plant-based ceremonies need to be measured against their impacts on the Amazon rainforest and its biocultures.
A dual-audience signaling problem framework provides a deeper understanding of the perpetuation of group-based inequality. We describe a model of underachievement among minority youth that posits a ...necessary trade-off between academic success and peer social support that creates a dilemma not typically encountered by nonminorities. Preliminary evidence consistent with the approach is discussed. Such strategic agent perspectives complement the psychological approach put forth by Dixon et al., but with minimal ancillary assumptions.
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