نتایج جستجو برای: medium timber
تعداد نتایج: 244573 فیلتر نتایج به سال:
Combining protected areas with natural forest timber concessions may sustain larger forest landscapes than is possible via protected areas alone. However, the role of timber concessions in maintaining natural forest remains poorly characterized. An estimated 57% (303,525 km²) of Kalimantan's land area (532,100 km²) was covered by natural forest in 2000. About 14,212 km² (4.7%) had been cleared ...
The British Columbian Ministry of Forests proposed an auction design to achieve fair market prices for its standing timber. Because the Crown owns almost all the standing timber in British Columbia, the Ministry proposed to auction a portion of that timber, and use the auction prices to set stumpage rates for timber under long-term tenure. In this manner, the private industry, and not the Crown...
Throughout Southeast Asia, the situation today is essentially the same. A deadly combination of poorly regulated commercial logging and a thriving illegal timber trade are decimating forest resources across the region. According to the UN's Food and Agriculture Organization, SE Asia has the highest rate of deforestation in the world (Fahn 2003). Ecological destruction of this scale has profound...
A forest owner with hyperbolic time preferences is considered. At each period the irreversible decision to harvest an old-growth forest could be taken. Conservation is the alternative. Future amenity value flow is uncertain while the net value of stumpage timber is known and constant. The decision problem is expressed as an optimal stopping problem and solved analytically in a time-inconsistent...
Because non-industrial private forests (NIPFs) comprise over 60% of forestland, NIPF owners may substantially affect timber supply and ecosystem quality. A dynamic model shows that NIPF owners may maximize timber income despite receiving utility from nontimber goods. The model links landowners' behavior to ecosystem management by introducing the ecosystem as an alternative source of nontimber g...
There are very few resources available to the timber industry that will enable the accurate identification of major tree species within Papua New Guinea. The unnecessary destruction of rare and otherwise valuable tree species has, in part, resulted from the inability to distinguish these species from the preferred timber species. Furthermore, the mixture of unwanted timber with that from prefer...
tance of dipterocarps in the global timber industry. Part of the value of timber from Southeast Asia is that most comes from dipterocarps; it is light and easily worked and can be sold in large volumes under just a few wood types. One of the great tragedies of the Asian timber industry is that dipterocarp forests are amenable to selective harvesting and long-term management, but economic and po...
May of the features of Timber have been adopted from the reactive object-oriented concurrent functional language O’Haskell [15], which was in turn defined as an extension to the purely functional language Haskell [12]. However, the Haskellian ancestry of Timber should not cause it to be ignored by the wider (non-functional) programming language community. Indeed, Timber attempts to combine the ...
The combustibility of timber is one of the main reasons that many building regulations strictly limit the use of timber as a building material. Fire safety is an important contribution to feeling safe, and an important criterion for the choice of building materials. The main precondition for an increased use of timber in buildings is adequate fire safety. This paper reviews the opportunities an...
The use of timber in structures like guard-rail systems requires knowledge about the behaviour at high loading rates. The present study aims at presenting a state of art report with respect to the impact bending strength of timber and to some extent to the behaviour of timber joints at high loading rates. The literature review indicates a difference in the experimental results and the conclusio...
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