In the first part of this paper we study approximations of trajectories of Piecewise Deter-ministic Processes (PDP) when the flow is not explicit by the thinning method. We also establish a strong error estimate for PDPs as well as a weak error expansion for Piecewise Deterministic Markov Processes (PDMP). These estimates are the building blocks of...
Abstract African mahogany (Khaya spp.) plantations are in expansion in Brazil and in the world. This fact justifies the need for studies related to its growth and yield. This paper aimed to evaluate the performance of single-entry and double-entry models for estimating merchantable and total volume for Khaya ivorensis plantations before the first t...
Published in New Forests
Predicting growth and production is the key to effective forest management, especially in those stands where silvicultural treatments are more intensive, such as silvopastoral systems. The aim of this study was to fit a state and transition model (STM) to predict the stem volume of slash pine silvopastoral systems under different management strateg...
Published in Forest Ecosystems
BackgroundStem radial growth in forests is not uniform. Rather, it is characterized by periods of relatively fast or slow growth, or sometimes no growth at all. These fluctuations are generally a function of varying environmental conditions (e.g. water availability) and, importantly, will also be associated with adjustments in properties in the woo...
We consider variants on the classical Berz sublinearity theorem, using only DC, the Axiom of Dependent Choices, rather than AC, the Axiom of Choice, which Berz used. We consider thinned versions, in which conditions are imposed on only part of the domain of the function—results of quantifier-weakening type. There are connections with classical resu...
Published in Production Engineering
The main purpose of this work is reduction of friction coefficient in deep drawing die to improve the deep drawing conditions of St37 blank sheet. For this purpose, graphite (Gr) and multi wall carbon nanotube (MWCNT) were introduced into low density poly(ethylene) (LDPE), and blown composite films were prepared by co-rotating extruder. The composi...
Published in New Forests
Narrow-leaved ash (NLA) has a wide natural distribution with ecologically different areas; however, in Sakarya, Turkey, the bottomland forests are now mostly dominated by pure NLA plantations. In this study, two thinning experiments were carried out in 22- and 36-year-old NLA plantations in Sakarya in order to determine the effects of different thi...
ABSTRACT The objective of this work was to assess the effect of vegetation on the runoff coefficients of a Caatinga dry tropical forest before and after thinning. Thus, an experiment was conducted with evaluations in three hydrological years (2008, 2011 and 2013) in Iguatu, State of Ceará, Brazil. In 2008, the vegetation consisted of a 30-year rege...
Published in Trees
Key messageThis work provides insight into the functional changes in above- and belowground tree tissues/organs after thinning and understory removal.AbstractNon-structural carbon (NSC), which reflects the relationship between the carbon source and carbon sink, plays a key role in the carbon cycle in forest ecosystems. Although thinning and underst...
The Mediterranean evergreen oak coppices of Southern Europe are increasingly vulnerable to drought because of both the ongoing climate change that increases drought length and intensity, and the lack of forest management that induces a structural aging of the stands. Decreasing stand density through thinning has been widely regarded as a means to i...
