A complex and sometimes serious problem facing modern day forest
managers is that of estimating and analyzing potential on-site impacts
which result from forest activities. A major type of adverse impact
is man-Initiated forest erosion. This consequence can be substantially
magnified when forest harvest and road activities are implemented in...
Although some of the most difficult problems in forest management occur as a result of timber harvest operations, present methodology in harvest planning emphasizes guidelines which rely heavily upon the experience of the individual forest manager for their correct application. This study was undertaken in an effort to develop a...
Herbicides are being used as a tool by forest managers to speed
the restocking of sites where tree seedlings face competition from
grasses for limited moisture, light and nutrients. Retarded growth
or, more commonly, death of the seedlings would occur if a selective
herbicide was not used to control competing...
This thesis consists of two parts. Part I (Chapters 1,
2, 3) of this thesis concerns finding the best way of
running a reactor whose catalyst decays with use, and must
consequently be replaced or regenerated at regular
intervals. Chapter 1 introduces the problem, and Chapter 2
develops a one...
During the First World War, the need to secure a domestic supply
of nitrate compounds necessary to the manufacture of explosives caused
the federal government to undertake an extensive program of research
and development of industrial nitrogen fixation processes. These
government activities were to have far-reaching consequences for the
development...
A theory of higher order connections is developed as
a reduction of the structure group of the jet bundle of
sections of a smooth vector bundle. This definition leads
naturally to higher order curvatures and covariant derivatives.
Curvature Conditions for a second order partial differential
operator to have constant coefficients...
The topic of summability methods has been studied by many
although the name of G. H. Hardy and his classical work "Divergent
Series" is best known. Almost all of the early work was done using
single sequences or series. In the past 30 years research has been
done extending some...
Long-term oceanographic and meteorological data were used to develop models that describe the observed variation in the recruitment of Pacific mackerel (Scomber japonicus) in the California
Current region. The models that were found to best describe recruitment included both density-dependent factors and environmental factors. Models incorporating only density-dependent factors
accounted...
Clinical methods to diagnose specific organ dysfunction have not been evaluated in fishes. To determine if an accepted clinical test of mammalian liver function could be applied to fishes, the
hepatic disposition of the organic anion sulfobromophthalein (BSP) was studied in rainbow trout (Salmo gairdneri) treated with a model hepatotoxicant....
Development of a performance analysis for propeller type wind
turbines is presented. The analysis uses a strip theory approach
that includes tip-loss and blade interference. A comparison is
presented between analysis and test data. The comparison indicates
that the analysis predicts wind turbine performance to an accuracy
that is within...
In the mild climate of the Pacific Northwest, the harvesting of
deciduous shade trees in wholesale nurseries is prolonged from
October to January because of autumn growth and prolonged leaf
retention. Economically, it is advantageous to defoliate nursery trees
at the earliest possible date. Premature defoliation, however, can
cause die...
The principal objective of this study was to identify
and investigate the underlying basis for variations in the
volumes of exports of U.S. winter pears during the 1947 to
1974 period. A number of factors thought to be of importance
in the determination of the volume of exports of a...