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The effect of size, color, and shape on weight discrimination: a study in suggestionUnknown Date (has links)
by Marjorie Grace Howard / Typescript / M.S. Florida State University 1933 / Includes bibliographical references
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A Comparative Study of Stream-Gaging Methods Employed in Nonpoint Source Pollution Studies in Small StreamsMitchem, Charles E. Jr. 03 February 2000 (has links)
The U.S. Geological Survey started measuring stream flow in 1888 as part of a public land irrigation study. The demand for accurate stream flow measurement has increased with the rising concern about nonpoint source (NPS) pollution. NPS pollution studies, such as TMDL development, often involve quantification of flow in small first and second order streams. This application of technology intended for use in larger streams presents special problems that must be addressed by the user.
The goal of this study was to conduct a comparative analysis of the current technologies used to measure flow in small streams with respect to accuracy and cost. The analyses involved field investigations, laboratory experiments, and a cost analysis. The specific study objectives were: 1) Compare the accuracy of various methods for estimating stream discharge in small first and second order streams, 2) Compare the accuracy of various methods for estimating stream discharge in a controlled laboratory environment, and 3) Evaluate the costs associated with installation, operation, and maintenance of each of the systems investigated.
Ten stream-gaging methods were evaluated for their field performance, laboratory performance, and costs. Analysis of the field investigation data indicated that the Marsh McBirney current meter and the One-orange method were the most accurate among the methods studied. The results of the laboratory experiments imply that the Starflow acoustic Doppler and Valeport BFM001 current meter performed best among the ten methods. The Starflow acoustic Doppler device also proved to be the most cost-effective method. Overall, the Marsh McBirney and Valeport BFM001 current meters exhibited the best performance for both field and laboratory situations among the methods evaluated. / Master of Science
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Stream gaging by continuous injection of tracer elementsWerrel, William Lewis, January 1967 (has links) (PDF)
Thesis (M.S. - Hydrology)--University of Arizona. / Includes bibliographical references (leaves 84-85).
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Estimation and analysis of the uncertainty in streamflow and change in reservoir-content data at selected streamflow-gaging stations in the lower Colorado River network, 1995-99Anning, David William. January 2002 (has links) (PDF)
Thesis (M.S. - Hydrology and Water Resources)--University of Arizona. / Appendix A: Standard errors of annual discharge and change in reservoir content data from selected stations in the lower Colorado River streamflow-gaging station network, 1995-99 (Water-resources investigations report no.01-4240) Includes bibliographical references (leaf 44).
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Gaging of the Gasconade RiverCollins, Lawrence. Hatch, Sidney R. January 1914 (has links) (PDF)
Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1914. / The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed April 6, 2009)
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Stream gaging by continuous injection of tracer elementsWerrell, William Lewis, 1931-, Werrell, William Lewis, 1931- January 1967 (has links)
No description available.
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Descriptive analysis of Pinot noir juice and wine qualitiesLudwig-Williams, Nancy 30 April 1987 (has links)
The overall purpose of this study was to develop
sensory evaluation methodology whereby wine quality can
be predicted from juice quality. Descriptive analysis
was used by a trained panel to describe Pinot noir juice
and wine from three sources. From each source, one wine
and four juice samples (a control and three treatments)
were prepared. The following three treatments were
applied to the crushed grapes prior to pressing the
juice: freezing and thawing; skin contact with 250 ppm
Pectinol VR (a pectinase); and skin contact with 250 ppm
Rohapect D5L (another pectinase). The trained panel
developed descriptive terminology which differed between
Pinot noir juice and Pinot noir wine. The juice
treatments created subtle, if any, aroma differences. Treatment differences were evident in color, as measured
by human perception and by instrumental measurement. Few
characteristics of wine aroma and/or color correlated
with juice aroma and/or color. Perceived color
correlated well with Somer's color density measurement
(the sum of the corrected absorbances at 420 and 520
nm.). Some of the same samples were evaluated by a wine
industry panel. They appeared to disagree regarding the
definition of varietal character. Further research
utilizing grapes from many sources is necessary to
determine whether Pinot noir wine quality can be predicted
from Pinot noir juice quality. / Graduation date: 1987
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Malate and tartrate in Oregon grapesNorton, Kerry M. 01 May 1987 (has links)
In western Oregon the titratable acidity of grapes at
harvest may in some seasons be higher than desirable for
making quality wine, due to the retention of malic acid.
The purposes of this study were 1) to investigate the
effects of a vineyard cultural practice, cluster exposure
at veraison by basal leaf removal, as a means of reducing
the malate content and titratable acidity of grapes, and 2)
to develop a rapid, simple, and inexpensive test procedure
by which smaller wineries and vineyards could evaluate the
effects of their own field experiments on the malate and
tartrate content of their grapes.
1. At veraison, clusters of Chardonnay grapes were a)
exposed to the sun by removal of all leaves opposite or
below the clusters, b) treated as in a) but shaded with
shadecloth, c) exposed to the sun by tying back leaves
opposite or below the clusters, or d) left untreated as a
control. Clusters of White Riesling were exposed to the
sun by similar leaf removal a) 10 days before veraison, b)
10 days after veraison, or c) untreated. Clusters of Pinot Noir were exposed a) at veraison, b) 2 weeks after
veraison, or c) untreated. Exposed clusters received 3 to
3.5 times more light than shaded clusters and up to 32%
more heat, with temperature differences between exposed and
shaded treatments being most pronounced during cool, sunny
weather. None of the treatments had any effect on juice or
berry malate, tartrate, or potassium content; however,
exposed clusters of Pinot Noir had a lower pH (.03) and
higher titratable acidity (.06%) than the control at
harvest. Cluster exposure of Chardonnay increased
sunburning of grapes, and cluster exposure of Pinot Noir at
veraison caused a 1% reduction in juice soluble solids
concentration at harvest. The detrimental effects of
cluster exposure by basal leaf removal at veraison, as well
as the lack of any major effect on the acid content of the
berries, suggest that the practice has no value for acid
reduction during a warm, dry maturation season in western
Oregon.
2. A rapid, simple procedure for the estimation of the
malate and tartrate content of grape juice is described.
The procedure, which requires only a pH meter for
instrumentation, does not directly measure malate and
tartrate but instead measures their buffering effect.
Samples are titrated between pH 2.70-3.00 and pH 4.50-4.80
and the titrant volumes required are compared to two sets
of empirically derived standard curves. The malate and tartrate composition of the sample may be determined by a graphical or algebraic method. The use of the estimation
method, its advantages, and its limitations are illustrated
with different viticultural trials. The estimation error
(estimated value - measured value) was influenced by many
factors including maturity, season, vineyard location, and
cultivar. Standard deviations of the estimation error for
malate and tartrate in mature grapes were equal to 9% and
15%, respectively, of the mean malate and tartrate
concentrations in pooled Pinot Noir and Chardonnay samples
from different vineyards and years. The estimation error
is probably due to interference from other buffers present
in juice. Although not as accurate as existing analytical
methods, the estimation method appears potentially useful
for determining relative effects of treatments in vineyard
trials where analytical equipment is unavailable or for
monitoring malate decline during maturation of grapes. / Graduation date: 1987
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Netwerkbeplanning van die riviervloeimeetstasienetwerk in die Oos-TransvaalMeijer, Engelbert Johan 02 1900 (has links)
Text in Afrikaans / Water is in 'n relatief droe land soos Suid-Afrika van uiterste belang. Daar is 'n groot behoefte aan inligting oor die
potensieel verbruikbare waterbronne. Hierin word voorsien deur 'n netwerk van riviervloeimeetstasies.
Met veranderende ekonomiese toestande word die effektiwiteit van die netwerk van al hoe groter belang. Dit is hier waar netwerkbeplanning 'n aktiewe rol begin speel. As gevolg van die groot variasie in die aard van die opvanggebiede in Suid-Afrika, en die feit dat daar 'n bestaande netwerk is, is dit nodig dat netwerkbeplanning stapsgewys benader word. Die Eerste Fase is 'n leerproses. Die verskillende opvanggebiede in die land kan gegroepeer word en die meetstasies kan geklassifiseer word. 'n Netwerkbeplanningsmetode, "Die ideale netwerk", is ontwikkel en word op drie opvanggebiede toegepas. Die belangrikste resultaat is die klassifikasie van al die meetstasies in die drie opvanggebiede. / In a relative dry country like South Africa water is of critical importance. Information on the potential usable water resources is very valuable. This information is supplied by a network of river flow gauging stations. In changing economic times the effectiveness of this network is of increasing importance. Network design plays a major role in
insuring this. Network design has to be approached in phases because of the variety in catchment characteristics in South Africa, and the fact that there is an existing network. The First Phase can be regarded as a learning phase, in which all the catchments in the country can be grouped and the stations can be classified. A network design method, · "The ideal network", was developed, and is applied in three catchments. The most important result is the classification of all the existing stations in the three catchments. / Geography / M. Sc. (Geografie)
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Netwerkbeplanning van die riviervloeimeetstasienetwerk in die Oos-TransvaalMeijer, Engelbert Johan 02 1900 (has links)
Text in Afrikaans / Water is in 'n relatief droe land soos Suid-Afrika van uiterste belang. Daar is 'n groot behoefte aan inligting oor die
potensieel verbruikbare waterbronne. Hierin word voorsien deur 'n netwerk van riviervloeimeetstasies.
Met veranderende ekonomiese toestande word die effektiwiteit van die netwerk van al hoe groter belang. Dit is hier waar netwerkbeplanning 'n aktiewe rol begin speel. As gevolg van die groot variasie in die aard van die opvanggebiede in Suid-Afrika, en die feit dat daar 'n bestaande netwerk is, is dit nodig dat netwerkbeplanning stapsgewys benader word. Die Eerste Fase is 'n leerproses. Die verskillende opvanggebiede in die land kan gegroepeer word en die meetstasies kan geklassifiseer word. 'n Netwerkbeplanningsmetode, "Die ideale netwerk", is ontwikkel en word op drie opvanggebiede toegepas. Die belangrikste resultaat is die klassifikasie van al die meetstasies in die drie opvanggebiede. / In a relative dry country like South Africa water is of critical importance. Information on the potential usable water resources is very valuable. This information is supplied by a network of river flow gauging stations. In changing economic times the effectiveness of this network is of increasing importance. Network design plays a major role in
insuring this. Network design has to be approached in phases because of the variety in catchment characteristics in South Africa, and the fact that there is an existing network. The First Phase can be regarded as a learning phase, in which all the catchments in the country can be grouped and the stations can be classified. A network design method, · "The ideal network", was developed, and is applied in three catchments. The most important result is the classification of all the existing stations in the three catchments. / Geography / M. Sc. (Geografie)
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