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Establishing the construction sequence of agricultural terraces is extremely complicated due to the nature of their technological foundation and use. A number of methodological approaches have been developed to address this difficulty, such as bulk soil 14C dating, Optically-Stimulated Luminescence (OSL), sediment grain size, or a combination of these, but a fundamental problem of stratigraphic disturbance still exists. In this article, we utilize multiple datasets, including radiocarbon determinations, faunal isotopic signatures, human osteological remains, archaeobotanical data sets, energetics assessments, and spatial data to establish the origins of Philippine Cordillera rice terraces. Dominant historical narratives in the region suggest a 2000–3000 b.p. inception of the terrace systems, but previous Bayesian modeling and current archaeobotanical, ethnohistorical, and ethnographic data indicate that the shift to wet-rice cultivation is a recent phenomenon and a response to the intrusion of the Spanish Empire in the northern highland Philippines.  相似文献   
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There exists a longstanding association between youth and revolution, partly due to the assumption that the politics of the former are inherently “prefigurative” in nature. Youth politics can often actually be quite conservative, however, as can be observed in contemporary Nicaragua, where rather than attempting to “change the world” in the way that previous militant youth generations were famously associated with, current Sandinista youth activists engage primarily in forms of neo‐patrimonial clientelism. At the same time, the evolving experience of everyday political action by university educated youth in Uttar Pradesh, India highlights how economic endeavours can, under certain circumstances, become a form of politics, often of a more transformative variety than classic forms of collective mobilization. The comparison of Nicaragua and India thus highlights the critical importance of considering the wider environment within which youth mobilize and take action in order to understand how and why particular political “ontologics” emerge.  相似文献   
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SUMMARY

The debates over Sunstein and Thaler’s Nudge oppose libertarianism and paternalism, or defend the authors’ proposed manipulation of individuals’ ‘choice architectures’ as a consistent system of libertarian paternalism. My essay looks beyond the terms of this debate and revisits Bentham’s ‘Indirect Legislation’ in order to excavate the issues raised by the deployment of technologies of behavioural economics in schemes of government. On the one hand, nudging is nothing other than a mild and carefully considered mode of indirect legislation, and the authors are right to join Bentham in pointing out that the landscape they seek to improve is always with us; we are always already governed and governing others, and we might as well govern and be governed better than we do/are. On the other hand, nudge-like innovations reveal the extent to which Bentham’s insights have been captured by a disciplinary orientation that removes its subjects from political space. Put differently, the issue with this kind of government is not that it interferes with our liberty so much as that it presumes our lack of political orientation and efficacy. Bentham’s liberal subjects inhabit a public and even republican space that Sunstein and Thaler’s neo-liberal subjects have long since abandoned.  相似文献   
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In an era of rapid geographical data acquisition, interpretations of remote sensing products are an integral part of many undergraduate geography degree schemes but there are fewer opportunities for collection and processing of primary remote sensing data. Unmanned Aerial Vehicles (UAVs) provide a relatively inexpensive opportunity to introduce the principles and practice of airborne remote sensing into field courses, enabling students to learn about image acquisition, data processing and interpretation of derived products. Two case studies illustrate how a low-cost “DJI Phantom Vision+” UAV can be used by students to acquire images that can be processed using Structure-from-Motion photogrammetry software. Results from a student questionnaire and analysis of assessed student reports showed that using UAVs enhanced student engagement and equipped them with data processing skills. The derivation of bespoke orthophotos and Digital Elevation Models has the potential to provide students with opportunities to gain insight into various remote sensing data quality issues, although additional training is required to maximize this potential. Recognition of the successes and limitations of this teaching intervention provides scope for improving future UAV exercises. UAVs are enabling both a reconstruction of how we measure the Earth’s surface and a reconstruction of how students do fieldwork.  相似文献   
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