The Shape of Humidity: Performing Black Atlantic Theory Making

Following bell hooks’ submission that theory making is “a location for healing” (2017, 59) “The Shape of Humidity: Performing Black Atlantic Theory Making” riffs upon the historically critical and widely circulated subject of the black body politic and Atlantic waters informing but non-exclusive to performance, art history, and visual cultural discourses. The theory making performed here alternatively frames the black Atlantic body in relation to humidity, illustrating what Deleuze and Guattari might call the “possibles” evoked  through “a contraction of earth and humidity” (Deleuze 1994, 76–78). The theory is shaped upon a discussion of Winslow Homer’s The Gulf Stream (1899), included in Kara Walker’s cultural-political opus, Kara Walker: After The Deluge (2006), mounted at the Metropolitan Museum of Art. Theory making confronts the painting’s adherence to the hegemonic tradition of rendering the black Atlantic body as a perennial form in peril, whose destiny in this instance is as matter consumed by the thermodynamic sublimity of the waters. Alternatively, the action of theory making here collapses space-time separations among black Atlantic flora, the healing processes of artists Lygia Clark and Wangechi Mutu, and modes of breath activation, to access states of limitlessness actualized through bodily openness to humidity’s grace.

Troop composition and behavior of mantled howler monkeys (Alouatta palliata) in mangroves and forested islands south of David, Panama

The mantled howler monkey, Alouatta palliata, is one of the most commonly studied and widely distributed primate species in Central America. They have been reported to inhabit mangrove environments in Panama, but few studies have undertaken to describe their demography and behavior in these particular ecosystems. For my study, I spent 12 days studying A. palliata populations in both the mangrove and forested island ecosystems (Isla Parida and Isla Boca Brava) south of David. Seven groups were found in the mangrove environments, and 11 groups were found on the island environments. The mangrove groups were significantly smaller and at a lower population density than in the islands. They also spent significantly less time foraging and ate less fruit than in the islands. Reasons for these differences may be connected to the low species diversity and nutrient quality of food in mangrove environments, which could present an ecological constraint on A. palliata troop size and behavior. This was a preliminary study into the previously undescribed populations of the region, and more research is needed. It is important to understand the ways that primates utilize coastal mangroves, particularly because these ecosystems face threats of habitat destruction

Moore’s Law and Space Exploration: New Insights and Next Steps

Understanding how technology changes over time is important for industry, science, and government policy. Empirical examination of the capability of technologies across various domains reveals that they often progress at an exponential rate. In addition, mathematical models of technological development have proven successful in deepening our understanding. One area that has not been shown to demonstrate exponential trends, until recently, has been space travel. This paper will present plots illustrating trends in the mean lifespan of satellites whose lifespans ended in a given year. Our study identifies both Wright’s law and Moore’s law regressions. For the Moore’s law regression, we found a doubling time of approximately 15 years. For Wright’s law we can see an approximate doubling of lifespan with every doubling of accumulated launches. We conclude by presenting a conundrum generated by the use of Moore’s law that is the subject of ongoing research

Centralized and Decentralized control of Microgrids

ABSTRACT Microgrid can be seen as an important controllable sub-system in future power systems. As a part of distribution network, the microgrid can operate in grid-connected or islanded mode to supply its local loads, and it consists of different renewable and non-renewable distribution generations that are connected to the system through power electronics (PE) interfaces. However, the control of microgrids is one of the important issues to focus on in order to overcome the challenges raised by high penetration of of renewable energy sources (RES). Depending on the responsibilities assumed by the different control levels, the microgrid can be controlled in centralized or decentralized modes. In centralized approach, the microgrid central controller (MGCC) is mainly responsible for the maximization of the microgrid value and optinization of its operation, and the MGCC determines the amount of power that the microgrid should import or export from the upstream distribution system by optimizing the local production or consumption capabilities. However, the MGCC should always consider the market prices of electricity, grid security concerns and ancillary services requested by the DSO when taking decisions. In this case an optimized operating scenario is realized by controlling the microsources and controllable loads within the microgrid, where non-critical, flexible loads can be shed, when profitable. Furthermore, the actual active and reactive power of the components are monitored. When a full decentralized control is implemented, the Management Center (MC) takes responsibilities and it competes or collaborates to optimize the production, satisfy the demand and provide the maximum possible export to the grid but all is done by considering the real time market prices. This thesis discusses the concepts of centralized and decentralized control of MG, where the main chapters introduce different control methods and PE interfaces that are involved in the microgrid control, while the final work presents simulation models that demonstrate how microgrids are controlled through inverters and the results. Using MATLAB/Simulink environment, PQ and V/f control modes of inverter are simulated and the results are discussed to point out their significant effect on balancing the voltage magnitude, maintaining the frequency and power sharing