The moulding and millwork industry consumes large
quantities of shop grade lumber which is becoming less
plentiful and of a lower quality. This fact has compelled
industry to explore the use of new technology to increase
product yield. One prospect for increasing yield is the
application of thin-kerf sawing technology....
It has been observed that edging flitches into lumber
unnecessarily reduces the yield of cut stock. This research
investigated the yield of cut stock from unedged red alder
(Alnus rubra) flitches, and compared it to yields attained
from boards subjected to a variety of edging strategies:
conventional, light-edging, actual, severe...
We studied the feasibility of using end-grain characteristics to match individual boards and cants back to their parent Douglas-fir (Pseudotsuga menziesii) logs. After reviewing marking/reading and biometric automated identification systems, we focused on end-grain biometrics because they appear to have the most promise for sawmills. Biometric identification requires that every...
The timber shortage in the Pacific Northwest is forcing sawmill owners to
improve the competitiveness of their harvesting and processing
operations. A computer simulation and financial statement analysis were
used to compare the processing efficiency and profitability of three
bucking strategies: log cost minimization (traditional 40-foot preferred-length
logs); hauling length...
Because of their high cost, reducing the number of boards used to fill an
order of dimension parts is an important goal in a lumber rough mill. FLCO
(Fuzzy Logic Cutting Order) is a computer program that achieves this goal.
Using the concepts of fuzzy logic control, FLCO provides a...
In the context of forest products, a cutting order is a list of dimension parts along with demanded quantities. The cutting-order problem is to minimize the total cost of filling the cutting order from a given lumber grade (or grades). Lumber of a given grade is supplied to the production...
Eighteen Ponderosa Pine (Pinus ponderosa Dougl.ex.laws) veneer flitches
were randomly selected and crosscut into paired flitches. Serpentine-end-matched
(SEM) joints were machined in the flitches, joint amplitude equal to the width in
one half of the paired flitch and joint amplitude equal to 2/3 width in the other half
of the...
Cutting forces and the occurrence of chip-out were investigated in
finger-joints machined into ponderosa pine (Pinus ponderosa) cutting
stock. Finger-joints were orthogonally cut in sample blocks at four
depths of cut (chip thicknesses) from 0.005 to 0.020 inch, twelve fiber
angles from -30 to +40 degrees, and at specific gravities...
Sawmills are very complex systems that involve many manufacturing processes. The variability of their raw material adds further to this complexity as each log has characteristics that determine its processing path. Therefore, computer simulation is a very useful technique for analyzing sawmill performance. This thesis describes a simulation computer model...
This is an interdisciplinary study combining the areas of
Sociology, Religious Studies, and Adult and Community Education.
Drawing from these disciplines, an investigation was made into
the religious and socio-economic variables of development and
their relation to family planning policies in the Muslim world.
The primary focus in this study...
