Bulletin No. 14: Creating New Landscapes with Herbicides, A Homeowner\u27s Guide

A how-to-do-it handbook describing the formulations and techniques to be used in eliminating unwanted plants such as poison ivy. The use of herbicides in naturalistic landscaping, wildlife and woodlot management are included. [Addendum on new data on chemicals inserted 1970] 30 pp

Optimal management of a flammable forest providing timber and carbon sequestration benefits: an Australian case study

In deciding to keep or fell a forest stand given its age, the risk of loss of timber through wildfire is an important consideration. If trees also have value from sequestration of carbon, another effect of fire is the unplanned loss of stored carbon. Factors affecting the decision to keep or fell trees, and how much to spend on fire protection, are investigated using stochastic dynamic programming, using carbon sequestration in stands of mountain ash in Victoria as a case study. The effect of treating sawlogs as a permanent carbon sink after harvesting is explored.Forest management, timber, carbon, dynamic, programming, Resource /Energy Economics and Policy,

Chemical Control of Woody Plants

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Uncertainty of Forest Biomass Estimates in North Temperate Forests Due to Allometry: Implications for Remote Sensing

Estimates of above ground biomass density in forests are crucial for refining global climate models and understanding climate change. Although data from field studies can be aggregated to estimate carbon stocks on global scales, the sparsity of such field data, temporal heterogeneity and methodological variations introduce large errors. Remote sensing measurements from spaceborne sensors are a realistic alternative for global carbon accounting; however, the uncertainty of such measurements is not well known and remains an active area of research. This article describes an effort to collect field data at the Harvard and Howland Forest sites, set in the temperate forests of the Northeastern United States in an attempt to establish ground truth forest biomass for calibration of remote sensing measurements. We present an assessment of the quality of ground truth biomass estimates derived from three different sets of diameter-based allometric equations over the Harvard and Howland Forests to establish the contribution of errors in ground truth data to the error in biomass estimates from remote sensing measurements

Analysis of DNA profiles of ash (Fraxinus excelsior L.) to provide evidence of illegal logging

The present work formed part of a research project supported by the General Directorate of State Forests (Grants BLP-333 and BLP-384). We gratefully acknowledge the Forest Guard staff from Śnieżka Forest District for their efficient cooperation. We also thank Małgorzata Gorzkowska from the Laboratory of Molecular Biology FRI Poland, who assisted with processing of plant material in the laboratory.Peer reviewedPublisher PD

Sarissa

W ostatnim okresie daje się zauważyć wzrost zainteresowania wojskowością czasów Filipa II Macedońskiego i Aleksandra III. Jedno z czołowych miejsc wśród studiowanych zagadnień zajmuje problem sarissy. W pracy podjęto próbę wskazania elementów sarissy w materiale archeologicznym. W pierwszej kolejności analizowano kwestię grotu oraz drzewca sarissy. Dane archeologiczne zestawiono z tekstami Ksenofonta, Diodora, Plutarcha, Grattiusa oraz Teofrasta. Zwrócono uwagę na zawarte w nich niejasności, a także odniesiono się do szeregu dotychczasowych błędnych interpretacji. W efekcie sądzić można, że macedońska sarissa to broń o takich samych cechach jak pika znana z czasów późniejszych. Dlatego też w artykule odniesiono się wielokrotnie do broni nowożytnej. W związku z powyższym wykazano na przykład, iż nic mają podstawy sądy o dużych grotach broni Macedończyków.Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 dofinansowane zostało ze środków MNiSW w ramach działalności upowszechniającej naukę

Forestry Economics: Principles and Practice

This review discusses bioeconomic models of the forest and uses them to explore policy options for forest management. The main type of bioeconomic model used is based on a biomass model of the growth of the forest, similar to the biomass model widely used in fishery economics. However a more detailed model, similar to the cohort-based models of fish stocks, which simulates the growth of subsections of the forest is also referred to. The bioeconomic models are based on simple assumptions about prices and costs - mainly that the forest industry, as a small part of the economy, is a price taker in both output and input markets. The models were initially used to examine the harvesting policy which would maximise the net present value of the timber produced by the forest. However it was recognised that non-timber values are becoming increasingly important and must be accounted for in the development of an optimal forest strategy. Case Studies consider some of the issues raised in the paper in greater detail.

From Data Topology to a Modular Classifier

This article describes an approach to designing a distributed and modular neural classifier. This approach introduces a new hierarchical clustering that enables one to determine reliable regions in the representation space by exploiting supervised information. A multilayer perceptron is then associated with each of these detected clusters and charged with recognizing elements of the associated cluster while rejecting all others. The obtained global classifier is comprised of a set of cooperating neural networks and completed by a K-nearest neighbor classifier charged with treating elements rejected by all the neural networks. Experimental results for the handwritten digit recognition problem and comparison with neural and statistical nonmodular classifiers are given

Bulletin No. 13: What\u27s Happening Along Our Roadsides?

Roadside spray practices in the National Forests, Recommended practices for Connecticu; Survey of what is actually happening. 24 pp

Bald Eagles at the Savanna Army Depot

Eagle Valley Environmentalists Technical Report #SADE-81, Research Report conducted December 1980 - March 1981, under a contract with the United States Arm