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.
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Showing 1 to 15 of 15 for “"White water"”.
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Testing the Adventure Model for outdoor adventure recreation participation
… that the level of enduring involvement of white water kayaking participants could be predicted by the following variables: frequency of participation, skill level, experience, social orientation, environmental preference, psychological outcomes, perception of risk, locus of control, and …
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Aggressive water attack on carbonated cement materials
… changes in chemical characteristics of the water exposed to cement concrete samples, inter alia pH, calcium and alkalinity. Over the period of the investigation (100 days) the following observations were found to apply to both brown and white water: (i) Generally uncarbonated OPC experiences …
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An Examination of the Relationship Between Adventure Recreation and Adolescent Identity Development
… skills, and environmental education) and white water rafting. The quantitative results supported the hypothesis that the adventure recreation program would promote positive adolescent identity development. The data also indicated only limited differences between the developmental impact of …
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Acquisition and transfer of experiential learning from rock climbing to the corporate workplace
… include different types of treatments such as white water rafting, sky diving, tall ship sailing, or caving.
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Water Chestnut: Field Observations, Competition, and Seed Germination and Viability in Lake Ontario Coastal Wetlands
Water chestnut (Trapa natans L.) has recently invaded an increasing number of sites in New York State, particularly Lake Ontario coastal wetlands. It can severely inhibit ecosystem functioning and can be costly to control. To understand this exotic invasive plant more thoroughly, field observations …
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Uakaris and Amazonian flooded forest.
… to live within the young $\textbf{varzeas}$ (white-water river floodplain) of the Amazon. A 20-month study of the ecology of the white uakaris $\textbf{(Cacajao calvus calvus)}$ was carried out in the floodplain located between the Japur$\acute a$ and Amazon Rivers in Brazilian Amazonia. The …
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The quality of change : growth of a whitewater resort in North Carolina
… The Nantahala Outdoor Center is a center for white water activities in western North Carolina. A portion of each seasons revenues is channeled into improved and new (3000-5000 square feet) facilities. Determining what to build and where is done on a season-by-season basis relative to available …
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Elucidating Temporal Variability in Organic Matter Sources and Cycling in Tropical Rivers
… dioxide gas evasion rates occurring in many white-water rivers. C<sub>4</sub> grasses, C<sub>3</sub> plants, and phytoplankton fuel respiration, with phytoplankton being important during the low-water season. On the mainstem, C<sub>4</sub> grasses are an important substrate for respiration …
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The Development and Testing of a Relational Model of Competence in the Context of Nature-Based Tourism
… onsite questionnaire was used to measure white water rafting customers' perceptions of the levels of motivation, knowledge, and communicative skills exhibited by their guide as well as their overall communication competence.</p> Two hundred and fifty two completed questionnaires were …
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The Development and Testing of a Relational Model of Competence in the Context of Nature-Based Tourism
… onsite questionnaire was used to measure white water rafting customers' perceptions of the levels of motivation, knowledge, and communicative skills exhibited by their guide as well as their overall communication competence.</p> Two hundred and fifty two completed questionnaires were …
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Ecology, Growth, and Migration of Pseudoplatystoma fasciatum in the Amazon Basin
Freshwater fishes include diverse lineages collectively summing to over 18,000 species, representing ~51% of all fishes and ~25% of all vertebrates. About one-third of all freshwater species occur in the Neotropics, with an estimated 4,475 species within 71 families. Catfishes of the Order …
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Two fluid numerical model for coastal applications
… breaking, waves are complex mixtures of air and water (“white water”) whose properties affect velocity and pressure fields in the vicinity of the free surface and, depending on the breaker characteristics, different mechanisms for air entrainment are usually observed. Several laboratory …
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Tratamento termofílico de efluentes de máquina de papel utilizando biorreator a membranas
Fábricas de papel consomem elevadas quantidades de água nos seus processos industriais gerando, conseqüentemente, grande volume de efluentes. Aumentar o reuso de água é uma forma que as empresas encontram para reduzir o consumo de água nas fábricas de papel. A reutilização da água nem sempre é …
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Effects of Scale Reduction Technologies and Chemical Inhibitors on Calcium Precipitation in Premise Plumbing Systems
… (electric and gas) and tank-less building hot water systems. Scaling can cause energy inefficiencies, flow reduction, pressure loss, and erosion corrosion damage. Consumers are also concerned with unsightly soap scum, cloudy water, discolored glassware, and failing infrastructure including …
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A case study of the Ottawa Valley whitewater rafting industry : standards and risks
… risk management practices of the Ottawa Valley whitewater rafting industry and the impacts of the government enforced Special-purpose Vessels Regulations are discussed. Data collection occurred using a single case study design, which included interviews and document analysis. This study found …