Conventional soil maps represent a valuable source of information about soil
characteristics, however they are subjective, very expensive, and time-consuming to
prepare. Also, they do not include explicit information about the conceptual mental
model used in developing them nor information about their accuracy, in addition to the
error associated with...
Implementation of a small-scale irrigation project in southern Mauritania is analyzed in
this report. The main objective is to demonstrate that small-scale irrigation farming is
the best suited solution for Mauritania's agriculture. To reach this objective different
steps are taken in this study. The first step highlights the different aspects...
Effects of lactobacilli in enteric coated capsules
were studied in piglets (Chapter I). Lactobacillus
acidophilus and Lactobacillus bulgaricus isolated from a
commercial product were formulated in capsules, enteric
coated, and then given to both Escherichia coli-challenged
and unchallenged baby pigs. Decreased
incidence and severity of diarrhea, and decreased weight
deceleration...
A cost reduction analysis is performed by coordinating
the exchange of LANDSAT (formerly ERTS) data between a CDC
3300 and a PDP8/L minicomputer. The LANDSAT data is displayed
on a 4002 Tektronix terminal by means of a grayscale output.
Large amounts of data and number manipulation are processed
in the...
The majority of people suffer from back pain at some point in their lives. Back pain is the leading cause of disability globally, ahead of 290 other conditions1. Over one million people in the United States receive spine surgery annually2. This thesis looked at five standard surgical procedures performed on...
Natural disturbances and human activities can alter the benthic composition of coral reefs and other marine ecosystems. Reef fishes that associate with particular structures on the sea floor, such as coral heads, may be vulnerable to perturbations of those habitats. The spread of a newly discovered crustose alga (Ramicrusta sp.)...
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) Food, predation risk, and microhabitat selection in a
marsh fish assemblage. Ecology 69: 1341 – 1351
Polyandry is a source of sexual conflict and males often try to limit female promiscuity. Consequently, male manipulation of receptivity via antiaphrodisiacs and copulatory plugs that prevent female remating can be a source of sexual conflict. This sexual conflict may be intensified when females must remate for fertility insurance. Male...
The focus of this research was to develop bacterial community indicators of stream sanitary and ecological condition. The first study compared substrate utilization patterns between centrifuged and uncentrifuged split samples. We found a shift in the relative proportion of each group of bacteria following centrifugation, with a marked increased in...
Traditional public health bacterial indicators of water quality and the Biolog® system were evaluated to compare their response to other indicators of stream condition with the state of Oregon and between ecoregions (Coast Range, Willamette Valley, Cascades, and Eastern Oregon). Forty-three randomly selected Oregon rivers were sampled during the summer...