نتایج جستجو برای: land forms
تعداد نتایج: 383976 فیلتر نتایج به سال:
Recently, widespread valley-bottom damming for water power was identified as a primary control on valley sedimentation in the mid-Atlantic US during the late seventeenth to early twentieth century. The timing of damming coincided with that of accelerated upland erosion during post-European settlement land-use change. In this paper, we examine the impact of local drops in base level on incision ...
This special issue on “Threshold Concepts in Management Education” invites readers to engage with a distinctive category of concepts that, when learned, result in students “seeing things in a new way” and thereby making transformative leaps in understanding (Meyer & Land, 2003, p. 1). Threshold concepts have garnered much attention and enthusiasm in the broader education literature over the pas...
Urban development with sustainable urban forms in high-density low-income Asian countries is a great challenge in the context of acute land scarcity. Though the model of compact cities is a natural choice for high-density urbanizing Asia, fierce competition for limited urban land resources without effective governance often results in an unfavorable form of densification and urban compaction. F...
A major transition in land plant evolution was from growth in water to growth on land. This transition necessitated major morphological innovations that were accompanied by the development of three-dimensional apical growth. In extant land plants, shoot growth occurs from groups of cells at the apex known as meristems. In different land plant lineages, meristems function in different ways to pr...
Stem cells self-renew and produce cells that differentiate to become the source of the plant body. The moss Physcomitrella patens forms eight types of stem cells during its life cycle and serves as a useful model in which to explore the evolution of such cells. The common ancestor of land plants is inferred to have been haplontic and to have formed stem cells only in the gametophyte generation....
This publication introduces the concepts and principles of landscape ecology for managing wildlife and other natural resources. It is intended to raise public awareness and give an overview of a new philosophy and method for managing natural resources at the landscape level. A landscape is a heterogenous area composed of a cluster of interacting ecosystems that are repeated in various sizes, sh...
Food production on the urban–rural fringe is under pressure due to competing land uses. We discuss the potential to improve resilience for urban–rural regions by enhancing food production as part of multifunctional land use. Through studies of peri-urban land in the regions of Gothenburg (Sweden), Copenhagen (Denmark) and Gent (Belgium), recent developments are analysed. Arable farming has been...
The paper analyses various forms of direct payments using the spatial and dynamic model AgriPoliS. In AgriPoliS farms are represented as agents which act and interact individually. This allows for endogenous structural change. The model is fitted to the agricultural region 'Hohenlohe' in Baden-Württemberg which is characterised by intensive livestock farming. The policy simulations show that th...
1 Community forests (CFs) in northern Burma have been gaining momentum since the mid-2000s, spearheaded by national NGOs, mostly in response to protect village land from encroaching agribusiness concessions. While the production of these new CF landscapes represents the material resistance against state-sponsored rubber, in effect it produces contested state authority by formalizing control of ...
A simple method that incorporates coupling between bath and system and between individual bath modes is proposed. In Ž . the new locally propagating gaussian LPG approximation, the bath is modeled by Gaussians at each system site that propagate in time. Each site couples to others by the overlap of their Gaussians. In a test case with weak but non-negligible coupling, LPG is nearly as rapid as ...
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