5,136 research outputs found
The Emerging Role of Universities in Collective Impact Initiatives for Community Benefit
Universities are increasing their efforts to more clearly demonstrate their social value. This article illustrates how higher education administrators can incorporate collective impact partnerships in their community benefit strategies. The article explores two of the more familiar paradigms for community benefitâcommunity engagement and anchor institution. Collective impact principles and practices are then presented. Finally, a case study provides a tangible example of how one universityâs role in a collective impact initiative transitioned in response to the community. We end the article with ten takeaways and an invitation for higher education administrators to identify their own learning and action steps that can help shift focus from proving to improving their institutionâs value to the community
Attitude Model of a Reaction Wheel/Fixed Thruster Based Satellite Using Telemetry Data
Attitude determination of satellites is normally the job of inertial instruments, such as gyroscopes, or through sensing instruments, such as star trackers or Global Positioning Satellites (GPS). Satellite health monitoring systems watch and determine if the satellite deviates from its normal operating attitude orientation. Knowing the orientation of a satellite is essential in being able to control it in order to complete the satellite\u27s designated mission. While there are a multitude of ways to determine a satellite\u27s orientation, very little research has been done on determining if the attitude of a satellite can be determined directly from telemetry data of the attitude control systems and an accurate spacecraft model. The fidelity of a satellite attitude determination model required to get reasonable predictions from using only telemetry data of the attitude controllers, such as thruster on/off indicators and reaction wheel rotor speeds, is investigated. Experimental tests using telemetry data received from the Air Force Institute of Technology\u27s (AFIT) Simulated Satellite, SimSat, is used in verifying a Matlab model which outputs SimSat\u27s orientation from SimSat\u27s reaction wheel and thruster telemetry data. Software modeling results showed that it is possible to determine a satellite\u27s attitude from only the attitude controllers\u27 telemetry data when the satellite\u27s dynamic model is known. Testing involving SimSat showed that attitude determination from the Matlab model is possible but not perfect. Additional information needs to be known about the satellite\u27s systems and characteristics and about the environment in which the satellite operates, in order to increase the fidelity of the model for more accurate predictions of the satellite\u27s attitude. Even though more research is needed, there is promise for using satellite attitude controllers fields such as health monitorin
Form-of-Life: From Politics to Aesthetics (and Back)
This article examines an often-mentioned but largely undeveloped concept in the work of Giorgio Agamben and in particular his Homo Sacer project: form-of-life. What is at stake in this concept is, I attempt to show, a way of thinking âpoliticsâ outside of the space of sovereignty. By examining a short text on this notion published just before the opening installment of the Homo Sacer sequence, this article demonstrates the way this early formulation of the concept is indebted to certain strains of Italian workerist and post-workerist thought. The fundamental question this analysis poses, however, is whether the concept of form-of-life, being to some extent âbeyondâ the classical space of politics, should in fact be understood as fundamentally aesthetic in nature
Decay estimates for variable coefficient wave equations in exterior domains
In this article we consider variable coefficient, time dependent wave
equations in exterior domains. We prove localized energy estimates if the
domain is star-shaped and global in time Strichartz estimates if the domain is
strictly convex.Comment: 15 pages. In the new version, some typos are fixed and a minor
correction was made to the proof of Lemma 1
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Jane Jacobs' âCities Firstâ Model and Archaeological Reality
In The Economy of Cities, Jane Jacobs conjectured that the world's first cities preceded the origins of agriculture, a proposition that was most recently revived by Peter Taylor in the pages of this journal. Jacobs' idea was out of line with extant archaeological findings when first advanced decades ago, and it remains firmly contradicted by a much fuller corpus of data today. After a review of how and why Jacobs formulated her âcities firstâ model, we review current archaeological knowledge from the Near East, China and Mesoamerica to document the temporal precedence of agriculture before urbanism in each of these regions. Contrary to the opinions of Jacobs and Taylor, archaeological data are in fact sufficiently robust to reconstruct patterns of diet, settlement and social organization in the past, and to assign dates to the relevant sites. Our response illustrates how generations of archaeological discoveries have yielded solid empirical foundations for the evaluation of wider social scientific debates.Anthropolog
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