Filtering by
- Creators: Han, Pu
- Creators: Sadowski-Smith, Claudia
In-process laser heating technique delivers a cost-efficient way to improve mechanical and geometrical properties to nearly isotropic and extremely smooth, respectively. The technique involves the incorperation of a solid-state laser into a commercial off-the-shelf 3D printer, mechanical system to allow controllable laser allumination on desired surfaces, and a gcode postprocesser to proper control of the mechanical system. This process uses laser for local heating, to enhance mass transfer between boundaries or to enhance surface reflow to smooth surface irregularity, to improve mechanical and geometrical properties. Only less than 3 W of laser power (CO2 laser) was used for high temperature material like PEEK and Ultem; less than 1 W (808nm laser) was found to be sufficient for achieving optimal properties for PLA. This technique has the potential for after-market integration into most commercial FFF 3D printers to achieved nearly isotropic and smooth 3D printed objects with various thermoplastic polymers.
Until recently, there has been little attention paid to the ways in which literary texts and other cultural productions explore the social and ecological dimensions of water resource systems. In its examination of water, this dissertation is methodologically informed by the interdisciplinary field of the energy humanities, which explores oil and other fossil fuels as cultural objects. The hydronarratives examined in this dissertation view water as a cultural object and its extraction and manipulation, as cultural practices. In doing so, they demonstrate the ways in which power, production, and human-induced environmental change intersect to create social and environmental sacrifice zones.
This dissertation takes an interdisciplinary environmental humanities approach, drawing on fields such as indigenous studies, political ecology, energy studies, cultural geography, and economic theory. It seeks to establish a productive convergence between environmental justice studies and what might be termed “Anthropocene studies.” Dominant narratives of the Anthropocene tend to describe the human species as a universalized, undifferentiated whole broadly responsible for the global environmental crisis. However, the hydronarratives examined in this dissertation “decolonize” this narrative by accounting for the ways in which colonialism, capitalism, and other exploitative social systems render certain communities more vulnerable to environmental catastrophe than others.
By attending to these issues through problem water, this dissertation has significant implications for future research in contemporary, transnational American and postcolonial literary studies, the environmental humanities, and the energy humanities. It demonstrates the potential for a focus on representations of resources in literary texts and other cultural productions to better grasp the inequitable distribution of environmental risk, and instances of resilience on a rapidly changing planet.