Since the beginning of the electrification in Canada in late 19th-century, wood poles have been widely used to provide structural support to electric transmission and distribution lines. Wood poles are typically exposed to severe environmental conditions, which cause deterioration due to wood rotting, insect attack, and weathering. The wood deterioration resulting in loss of strength …
Tag Archive: Agriculture
Mar
10
Impregnation du bois assistee par des ondes de pression
Cette recherche visait a developper un procede dimpregnation utilisant des ondes de choc pour teindre du bois franc. Dimportants progres ont ete realises a cet egard dans le projet. Tout dabord, un modele theorique a montre que les ondes de choc augmentent la penetration dans un milieu poreux de permeabilite constante, mais seulement si le …
Mar
08
Field measurements of the linear and nonlinear shear moduli of soils using drilled shafts as dynamic cylindrical sources
The framework for a generalized field method to evaluate the shear modulus of soils in the linear and nonlinear strain ranges was developed. The field set-up utilizes a cylindrical, axisymmetric source that, in this work, was simply a drilled shaft. The test procedure involves applying vertical dynamic loads to the top of the cylindrical source. …
Feb
21
Object oriented classification of Australian pine ( Casuarina equisetifolia), an invasive exotic species in south Florida
Invasive exotic plant species cause a number of problems in native south Florida ecosystems, and a great deal of effort is being put into controlling the populations of these species. Control efforts require updated information on the locations of exotic species. This information can be obtained from high resolution remotely sensed data such as digital …
Feb
20
Effect of wood storage and seasonal variations of hardwoods on pulp and paper properties
Wood induced variations are one of the major causes of product quality fluctuations in the pulp and paper manufacture. Wood storage time and form), seasonal variations are the factors that contribute to the variations in pulp and paper quality. However these variations are species specific. Maple, birch and aspen are the predominantly used hardwoods for …
Feb
16
Feasibility of Wastewater Reuse for Fish Production in Small Communities in a Developing World Setting
Eradicating poverty, malnutrition, and the burden of disease have been included as three of the major issues facing the world. The United Nation member countries, having set forth the Millennium Development Goals, have committed themselves to solving these problems. Two major factors which affect solutions to these problems are increasing water stress and implementing improved …
Feb
11
Fish habitat mapping using acoustic and GIS technologies
A rapid and accurate the method of assessment for fish habitats is a growing need as there is increasing degradation of aquatic environments world wide. While several small Canadian companies have developed useful technology to assess fish habitats, their ability to manage and integrate data into geographic information system GIS) is limited. The first objective …
Jan
20
Hydrologic and non-point source pollution risk analysis on agricultural watersheds
Non-point source NPS) pollution caused by nutrients and pesticides is a problem of significant interest in agricultural watersheds. The main goal of this study was the development of a decision support system DSS) to compute hydrologic and NPS pollution risk in agricultural watersheds using a comprehensive hydrologic model. The SWAT model Soil Water Assessment Tool) …
Jan
19
Hyperspectral remote sensing image analysis for citrus pest monitoring
The field of remote sensing has undergone tremendous development in the past decades. One of the fastest growing applications of remote sensing is precision agriculture. Perhaps no one area of remote sensing has had as many implications for the environmental and agricultural studies as hyperspectral imaging. Hyperspectral imaging data provides high spatial and spectral resolution …
Jan
19
Field investigation for comprehensive assessments of four selected stabilization methods for soft subgrade soils
The long term performance of the pavements constructed on subgrade soils of poor properties such as low strength and high swell characteristics is highly affected by the poor soil properties. The pavement distress due to swell movements of the subgrade soil leads to pavement ponding problems, riding discomforts and future traffic delays due to repair …