Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"negative slope"”.
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Continuum models of deformation mechanisms in nanocrystalline metals
… the inverse square root of the grain size with a negative slope. In addition, the model suggests that the observed discrepancy between atomistic and experimental results may be partially related to rate dependence effects.
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Does the Relative Age Effect Exist in Elite Sport? An Analysis of Olympic Competition
… used to determine a directional distribution. A negative Gini coefficient and a statistically significant negative slope of the birth month distribution suggested the existence of a RAE. The results showed that there was a RAE in Olympic competition. For all athletes, the Gini coefficient was …
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Instability of flow boiling in parallel microchannels
… is theoretically analyzed. The span of the negative slope region (where instability is manifested) depends on with saturation conditions, inlet subcooling, heat flux, channel size and length, and fluid type. The negative slope region decreases with decreasing heat flux, liquid and vapor …
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Effective schools research : a meta-analysis of progress monitoring and the impact on student achievement
… and reduced-price lunch, although there was a negative slope, no correlation between the effects of poverty and progress monitoring could be determined within the studies in this meta-analysis. Additional research in the area of progress monitoring is still needed and is outlined within this …
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Platinum-group element mineralisation in the Shetland ophiolite complex
… of PGE can be explained by an open system model. Negative slope patterns are produced by the precipitation of PGM from PGE saturated magmas during chromite crystallisation. This initial process buffers the PGE concentrations in each primitive magma pulse. On entering the axial chamber and mixing …
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Direct Measurements of the Effects of Cyclic Adenosine Monophosphate, and Related Compounds, on Membrane Conductances, Intracellular Calcium and Ph in Gastropod Neurons (cyclic-Amp)
… in the net inward current underlying the negative slope resistance (NSR) region of the I-V curves in these neurons. The internal pH routinely decreased in a reversible, dose-dependent manner following cyclic AMP injections, with the peak pH responses always occurring subsequent to the peak …
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Quantification of tobacco aphid, Myzus nicotianae Blackman, injury to flue-cured tobacco, Nicotiana tabacum (L.)
… variables were characterized by a decreasing negative slope; therefore, incremental losses were greatest at low levels of cumulative aphid-days. Regression models were developed to describe crop production responses as a function of cumulative aphiddays. The quality of the cured leaves (grade …
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Sulfate in foraminiferal calcium carbonate : investigating a potential proxy for sea water carbonate ion concentration
… proportional to the pH of the seawater. The slope of the relationship between cultured G. sacculifer S/Ca and the pH of the seawater medium was -1.92 mmol mol-1/pH unit with a least squares linear correlation coefficient, r2=0.927. The S/Ca ratios of planktonic and benthic foraminifera from …
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Dynamic stability, blowoff, and flame characteristics of oxy-fuel combustion
… due to weaker flames, there is an unexpected negative slope in blowoff velocity vs temperature for both air and oxy-combustion. The blowoff data are shown to collapse due to blowoff velocity being inversely proportional to the molar heat capacities of the burned gas mixtures at a given power. …
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Effects of negatively sloped keyboard wedges on user performance and perceptions
Of the studies that considered negatively sloped keyboards, results showed improved comfort and postural effects while typing on keyboards; however, few studies of negatively sloped keyboard angles and their resulting effects on objective physiological measures, psychological measures, and …
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Dynamics of phase locking in neuronal networks in the presence of synaptic plasticity
… results hold in general. The properties of the Negative-Leak model are also studied; a recent conductance-based model which is obtained by replacing a regenerative inward current with a negative-slope-conductance linear current. The map methods are extended to analyze networking properties of …
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Frictional oscillations in elastomeric sliding
… friction (typically for metallic systems) or a negative slope of the friction velocity curve. It has also been related to a maximum of tan delta or the loss modulus. Test results show that it is possible to have stick-slip occur in regions of positive or zero slope of the friction velocity …
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AUGUST STREAM DISCHARGE TRENDS PORTEND IMPACTS OF CLIMATE CHANGE IN THE NORTHERN ROCKIES
… that 75% of all stations exhibit a declining slope. Bootstrap analysis indicates that the NR is experiencing a significant (á = 0.10) decline in discharge from 1951-2008. The second chapter takes a subset of the original 153 sites, deemed pristine sites, and examined the relationship of August …
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AUGUST STREAM DISCHARGE TRENDS PORTEND IMPACTS OF CLIMATE CHANGE IN THE NORTHERN ROCKIES
… that 75% of all stations exhibit a declining slope. Bootstrap analysis indicates that the NR is experiencing a significant (á = 0.10) decline in discharge from 1951-2008. The second chapter takes a subset of the original 153 sites, deemed pristine sites, and examined the relationship of August …
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Statistical analysis of rainfall and groundwater trends and their spatial variations in the Mopani District, South Africa
… the double mass curve, Mann-Kendall test, Sen’s slope estimator, quantile regression, and geospatial analysis with QGIS software to identify trends and correlations. Rigorous quality control measures ensured data integrity, which was confirmed through double-mass curve analysis showing a strong …
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The Development of a Conceptual Framework for Identifying Functional, Expressive, Aesthetic, and Regulatory Needs for Snowboarding Helmets
… on attitudes toward helmet use was positive (slope = .013) when all variables were at their respective means (Hypothesis 1). Hypothesis 2 tested to see if there was an impact between attitudes toward helmet use and perceived importance of expressive needs, but again, this relationship depended …
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The growth pattern of various body and carcass parts and proportions of beef steers as influenced by different planes of nutrition
… age or slaughter time was linear with positive slope on rations I and II and negative on rations III and IV. 7. The percentage moisture in the meat showed a quartic regression with age on ration I presumably due to random fluctuation of the means. For rations II and III, the relationship was …
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The impact of stress history of deformable dry granules on the mechanical properties of tablets
… (MCC). A strong linear relationship (with negative slope) exists between the tablet tensile strength and granule solid fraction. In contrary to popular perception, granule size has no statistical impact on the tablet tensile strength. A smooth or rough fracture surface of tablets prepared …
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I. The Reaction of Carboxylic/Thiocarboxylic Acids with Isonitriles II. Ruthenium Hydride Ring Opening of an Azetidinium Cation
… solvent) is a straight line with a substantial negative slope, implying that the reaction is retarded by hydrogen bonding to the solvent but not affected significantly by other solvent properties. It is speculated that the related Passerini reaction is affected in a similar matter, although …
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A Monte Carlo calculation of the resonance escape probability of thorium in a homogeneous reactor
… fits very closely to a straight line with small negative slope throughout the whole range of stable concentrations. The Monte Carlo statistics provides probable errors of less than 0.3% for all five points calculated. Each of the five points lies close enough to the straight line of least-squares …
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