Book Chapters by kelton mendes
Amazonia Antropogenica, 2016
Publications by kelton mendes
Science Advances, 2023
Fertile soil known as Amazonian dark earth is central to the debate over the size and ecological ... more Fertile soil known as Amazonian dark earth is central to the debate over the size and ecological impact of ancient human populations in the Amazon. Dark earth is typically associated with human occupation, but it is uncertain whether it was created intentionally. Dark earth may also be a substantial carbon sink, but its spatial extent and carbon inventory are unknown. We demonstrate spatial and compositional similarities between ancient and modern dark earth and document modern Indigenous practices that enrich soil, which we use to propose a model for the formation of ancient dark earth. This comparison suggests that ancient Amazonians managed soil to improve fertility and increase crop productivity. These practices also sequestered and stored carbon in the soil for centuries, and we show that some ancient sites contain as much carbon as the above-ground rainforest biomass. Our results demonstrate the intentional creation of dark earth and highlight the value of Indigenous knowledge for sustainable rainforest management.
Papers by kelton mendes
2021 33rd Chinese Control and Decision Conference (CCDC), 2021
This paper proposes a compensatory reaching law sliding mode control method to suppress the influ... more This paper proposes a compensatory reaching law sliding mode control method to suppress the influence of surplus uncertainties on the convergence performance of the system. The compensatory reaching law has the function of estimating and compensating the surplus uncertainties by adding a compensation term in the design of the reaching law, so as to avoid the design of disturbance observer or other methods to deal with uncertainties. The designed method can greatly simplify the structure of the controller and improve the control performance of the system. The simulation results show the simplicity and superiority of this method.
2021 40th Chinese Control Conference (CCC), 2021
Dynamic job shop scheduling (DJSS) has been shown as a realistic and complex combinatorial optimi... more Dynamic job shop scheduling (DJSS) has been shown as a realistic and complex combinatorial optimization problem, which is characterized by complexity, dynamics, and uncertainty. Though dispatching rules (DRs) have been seen as a suitable method for solving DJSS problem, it is hard to manually design a DR with good scheduling performance considering all the aspects, much less a general DR for the complex dynamic environment of the job shop. This paper presents a genetic programming hyper-heuristic (GPHH) based DR evaluation approach to automatically generate customized DRs, in which job shop configuration, objective, and other information are considered. After testing it on the single objective DJSS problems with six different scenarios, the experimental result indicates that the proposed method can effectively evolve better DRs for different DJSS problems than manually designed DRs. Besides, the role of four key parameters in GPHH, including the number of generations, the population size, and the maximal depth, have been deeply analyzed based on the corresponding experiments.
Latin American Journal of Development, 2021
As discussões sobre o estado de preservação e possibilidades de impactos a sítios arqueológicos n... more As discussões sobre o estado de preservação e possibilidades de impactos a sítios arqueológicos na arqueologia brasileira têm sido um tema recorrente e importante para moldar as ações de instituições de salvaguarda e pesquisadores da área. Especialmente a partir da década de 1960, vários estudos têm sido realizados sobre esse tema na intenção de diagnosticar e, quando possível, agir sobre as questões de conservação. Independentemente do ambiente e tipo de sítios arqueológicos que sejam objeto dessas preocupações, tem se mostrado necessário levar em consideração a ocupação humana recente como um dos principais fatores de interferência sobre os sítios. A partir do levantamento realizado em 100 sítios arqueológicos localizados nos municípios de Manaus e Iranduba, Estado do Amazonas, buscamos contribuir com esta questão. Para tal, partimos do princípio que é imprescindível considerar a relação de comunidades contemporâneas com objetos arqueológicos a partir não só das estratégias de ocu...
Science Advances
Fertile soil known as Amazonian dark earth is central to the debate over the size and ecological ... more Fertile soil known as Amazonian dark earth is central to the debate over the size and ecological impact of ancient human populations in the Amazon. Dark earth is typically associated with human occupation, but it is uncertain whether it was created intentionally. Dark earth may also be a substantial carbon sink, but its spatial extent and carbon inventory are unknown. We demonstrate spatial and compositional similarities between ancient and modern dark earth and document modern Indigenous practices that enrich soil, which we use to propose a model for the formation of ancient dark earth. This comparison suggests that ancient Amazonians managed soil to improve fertility and increase crop productivity. These practices also sequestered and stored carbon in the soil for centuries, and we show that some ancient sites contain as much carbon as the above-ground rainforest biomass. Our results demonstrate the intentional creation of dark earth and highlight the value of Indigenous knowledge...
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Book Chapters by kelton mendes
Publications by kelton mendes
Papers by kelton mendes