The constrained forest problem seeks a minimum-weight spanning forest in an undirected edgeweighted graph such that each tree spans at least a specified number of vertices.We present a structured class of greedy heuristics for this NP-hard problem, and identify the best heuristic. © 2005 Elsevier B.V. All rights reserved.

Supplemental material available online. Soil Sci. Soc. Am. J. 79:1470–1481. doi:10.2136/sssaj2015.03.0101 Received 13 Mar. 2015 Accepted 13 July 2015. *Corresponding author ([email protected]). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA. All Rights reserved. Influence of Forest Disturbance on Stable Nitrogen Isotope Ratios in Soil and Vegetation Profiles Forest, ...

This study compared two alternative techniques for predicting forest cover types from cartographic variables. The study evaluated four wilderness areas in the Roosevelt National Forest, located in the Front Range of northern Colorado. Cover type data came from US Forest Service inventory information, while the cartographic variables used to predict cover type consisted of elevation, aspect, and...

He, Hou, Lih, Shao, Wang, and Zhu showed that a planar graph of girth 11 can be decomposed into a forest and a matching. Borodin, Kostochka, Sheikh, and Yu improved the bound on girth to 9. We give sufficient conditions for a planar graph with 3-cycles to be decomposable into a forest and a matching. c © 2008 Elsevier B.V. All rights reserved.

— In this paper we assess the institutional and environmental impacts of forest decentralization in Bolivia, Kenya, Mexico, and Uganda. We develop theories of institutional impacts based upon the specific content of decentralization reforms. We classify each country’s reforms in terms of the creation/change in local user group empowerment and accountability mechanisms. Using data from the Inter...

The information that all members of a set enjoy a property expressed by an adjective can be processed in a systematic way. The purpose of the work is to find out how to do that. If it works, ‘membered’ will become a reserved word and the work with it will be automated. I have chosen membered rather than inhabited because of the compatibility with the Automath terminology. The phrase τ inhabits ...

The information that all members of a set enjoy a property expressed by an adjective can be processed in a systematic way. The purpose of the work is to find out how to do that. If it works, ‘membered’ will become a reserved word and the work with it will be automated. I have chosen membered rather than inhabited because of the compatibility with the Automath terminology. The phrase τ inhabits ...

Forest models can be useful tools to improve our understanding of forest dynamics and to evaluate potential impacts of climate change. There is an ongoing debate how drought events influence the dynamics of tropical forests. In this study, we explored the role of changes in precipitation on tropical forests in Madagascar. Therefore, we derived a new parameterization of the process-based forest ...

© 2016. Hosting by Elsevier B.V. All rights reserved. Keyword: Condition monitoring Ball bearing Electrical motor Fuzzy min-max neural network Random forest