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Creator:: Vatovec, M., Miller, T. H., and Gupta, R.
Abstract:: A commercially available, three-dimensional finite-element analysis software was used to model the load-displacement behavior of metal-plate-connected (MPC) joints in wooden trusses. Model features included consideration of material properties, teeth-to-grain-to-direction-of-force orientation, wood-to-wood interaction, and gaps between wood members. To simulate wood-to-plate interaction, the main feature of the model, each tooth of...
Resource Type:: Article
Full Text:: OF METAL-PLATE-CONNECTED WOOD TRUSS JOINTS M. Vatovec, T. H. Miller, R. Gupta ABSTRACT. A

Creator:: Vatovec, M., Miller, T. H., Gupta, R., and Lewis, S.
Abstract:: A previously developed, three-dimensional (3-D) finite-element (FE) joint model and several two-dimensional (2-D), beam-element based FE models with different joint-stiffness assumptions (pinned, rigid, and semi-rigid) were used to analyze the full-scale behavior of a metal-plate-connected (MPC) wood scissors truss. The truss displacement and force results were investigated for sensitivity with...
Resource Type:: Article

Creator:: Pearlstein, R. M., Van Nostrand, F., and Nairn, J. A.
Abstract:: The nonexponential phosphorescence decay of a highly folded form of poly-riboadenylic acid (poly rA) with noncovalently bound dye is explained by a novel application of a well-known theory of electronic excitation transfer based on the Förster mechanism. This theory, originally used to describe singlet-singlet energy transfer from donor molecules to...
Resource Type:: Article
Full Text:: TRANSFER FROM COMPACT POLY rA TO BOUND DYE AT 77 K R. M. PEARLSTEIN, F. VAN NOSTRAND, AND J. A. NAIRN

Creator:: Leijten, A. J. M., Franke, S., Quenneville, P., and Gupta, R.
Abstract:: Bearing or compressive strength capacity perpendicular to the grain of timber beams is a troublesome issue. Not only do many different load cases occur in practice that are not covered by structural timber design codes but also these codes provide only a basic provision and vary throughout continents. Code design...
Resource Type:: Article
Full Text:: test methods and structural design codes A.J.M. Leijten 1 , S.Franke 2 , P.Quenneville 3 , R

Creator:: Maguire, Douglas A., Johnston, Stuart R., and Cahill, James M.
Abstract:: The quality of lumber and veneer recovered from logs of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) is directly influenced by the maximum limb size attained on the crop tree. Because limb sizes are influenced by standdensity regimes, a need has arisen for quantitative tools that link a wide array of silvicultural...
Resource Type:: Article
Full Text:: -level descriptors Douglas A. Maguire, Stuart R. Johnston, and James Cahill Abstract: The quality of

Creator:: Giachini, Admir J., Camelini, Carla M., Rossi, Marcio J., Soares, Claudio R. F. S., and Trappe, James M.
Abstract:: Gomphus sensu lato (Gomphales) was described to include species of cantharelloid-gomphoid fungi that had 'merulioid' (wrinkled) hymenia and verrucose spores. Gomphus sensu stricto is currently characterized by unipileate to merismatoid (composed of several pilei) basidiomata, depressed funnel- to fan-shaped pilei, presence of clamp connections, and verrucose spores; it has three...
Resource Type:: Article
Full Text:: , Márcio J. Rossi1, Cláudio R. F. S. Soares1 & James M. Trappe2 1Universidade Federal de Santa Catarina

Creator:: Graham, R. D. (Robert D.), Wilson, M. M., Oteng-Amoako, A., and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: 1 07 A45J' P1,.71 cop .7 COMPACT orrosion My R. D. Graham M. M. Wilson A. Oteng-Amoako Forest

Creator:: Johnson, Daniel M., McCulloh, Katherine A., Woodruff, David R., and Meinzer, Frederick C.
Abstract:: Angiosperm and coniferous tree species utilize a continuum of hydraulic strategies. Hydraulic safety margins (defined as differences between naturally occurring xylem pressures and pressures that would cause hydraulic dysfunction, or differences between pressures resulting in loss of hydraulic function in adjacent organs (e.g., stems vs. leaves) tend to be much...
Resource Type:: Article
Full Text:: a A R R A A K P X E C V N C 1 p m m s 0 h Plant Science 195 (2012) 48– 53 Contents lists

Creator:: Johnson, Daniel M., McCulloh, Katherine A., Woodruff, David R., and Meinzer, Frederick C.
Abstract:: Hydraulic conductance of leaves (K[subscript leaf]) typically decreases with increasing water stress and recent studies have proposed different mechanisms responsible for decreasing K[subscript leaf]. We measured K[subscript leaf] concurrently with ultrasonic acoustic emissions (UAEs) in dehydrating leaves of several species to determine whether declining K[subscript leaf] was associated with xylem...
Resource Type:: Article
Full Text:: (% ) 0 10 20 30 40 R 2 = 0.99 Vascular bundle area stained (%) 0 10 20 30 40 % K m ax 0 25

Creator:: Grotta, A. T., Gartner, Barbara L., Radosevich, S. R., and Huso, M.
Abstract:: To better understand the influence of competition on wood formation and wood quality in Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco), patterns of cambial growth and latewood production were examined for one growing season in 15-year-old plantations with similar densities but differing Douglas-fir/red alder (Alnus rubra Bong.) ratios. The treatments consisted of...
Resource Type:: Article
Full Text:: (m ) D ou gl as -fi r D B H (c m ) # tre es sa m pl ed R ed a ld er B A (m 2 / ha

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