ESTUDO DA CONTRIBUIÇÃO INERCIAL E DE AMORTECIMENTO DE LINHAS DE ANCORAGEM NO MOVIMENTO DE MONOBOIAS

In offshore oil production activities, monobuoys comprise oceanic terminals used by offloading ships to control the oil transference to the coast. They are relatively small structures, with accentuated dynamic responses when submitted to wave forces. Due to their lower inertia when compared with other types of floating systems, their mooring lines and risers lines may contribute directly with its static and dynamic behavior, evidencing a structural and hydrodynamic coupling between monobuoy and lines. In the search of an analysis methodology that may take advantage on both coupled and uncoupled formulations, this work presents procedures to evaluate, based on coupled simulations, the inertial and damping contribution of the mooring lines and risers into the monobuoy’s responses. These values may be inserted as input parameters into a calibrated uncoupled simulation to obtain dynamic responses with higher accuracy and lower computational cost. This work will present a case study of a standard monobuoy, with 9 mooring lines, located into a 90 meter water depth, comparing the motions provided by coupled and uncoupled simulations, with and without the proposed calibration procedure, and assessing the computational costs

What is the potential for replacing monocultures with mixed-species stands to enhance ecosystem services in boreal forests in Fennoscandia?

The boreal forests of Fennoscandia are largely dominated by Norway spruce and Scots pine. Conifer monocultures have been favoured in forest management during the last decades. Recently, concern has risen that forests consisting of only one tree species could be vulnerable to biotic damage. Additionally, environmental and societal changes are placing new demands on forest utilization, thus shifting the focus to alternative forest management options providing a wider scale of ecosystem services. It has been proposed that mixed forests are better than monocultures with respect to biodiversity, risk management and recreational value. By synthesising research studies, we provide an overview of current knowledge on how to combine wood production and other ecosystem services in mixed boreal forests in Fennoscandia. We addressed the following questions in more detail: what are the effects of mixed forests on soil properties, understorey vegetation, biodiversity, wildlife, resistance to and resilience against damage, forest productivity and the multiple use of forests? Furthermore, what are the silvicultural possibilities for establishing and managing mixed forests?Based on this review, mixed forests appear to provide a higher output of most ecosystem goods and services, including higher biodiversity and improved risk management, soil properties and multiple-use values. The most serious challenge is the browsing by cervids, which damages sapling stands. There is potential to establish single-storied mixed forests with current regeneration methods and material. Further research is particularly needed on the silvicultural practices suited for mixed boreal forests

Detecting moose (Alces alces) browsing damage in young boreal forests from airborne laser scanning data

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Smart Clothing for the Arctic Environment

New fiber and textile materials and miniaturized electronic components make it possible to create truly usable smart clothes. These intelligent clothes are worn like ordinary clothing providing help in various situations according to the designed application. This paper describes the design and implementation of a survival smart clothing prototype for the arctic environment. Concept development, electrical design, non-electrical features, textile material selection, and clothing design are discussed. Communication and positioning aids have been provided to the suit’s user. Several human and the environment measurements decide whether an emergency message should be sent. The functionality of the suit has been tested in the arctic environment. 1