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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 20 of 211 for “"seasonal variations"”.
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Evaluation Of Pavement Surface Friction Seasonal Variations
… has been observed that both short- and long-term seasonal variations impact wet-pavement friction. Temperature, rainfall, and contaminants accumulated on the pavement surface affect the friction measurements. The objective of this thesis was to quantify the effect of seasonal variations on …
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Spatial and Seasonal Variations in Aridification Across Southwest North America
… season P and E. Interpreting the spatial and seasonal variations of the projected aridification is important for understanding the potential impacts of climate change on SWNA regional hydrology. We compare the projected trends in P, E, and P−E in CMIP5 global climate model projections, for the …
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Seasonal variations in preferential flow under corn and soybean cropping
… present time, knowledge of spatial and temporal variations in preferential flow under different cropping systems and tillage practices during the growing season is lacking, which has complicated the making of sound and reasonable regulatory decisions on the use of agrichemicals. In order to …
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An analysis of northern hemisphere block sizes compared to climatology and seasonal variations
… mid-latitude anticyclonic events and seasonal characteristics. A 20-year analysis of North American blocking events was compiled by calculating the mean size of each event using NCEP-NCAR analyses and a simplified Rossby wave equation. Blocking events were identified using block …
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A Study of Pathological Conditions in Wild Rodents (Rattus Norvegicus) with Respect to Seasonal Variations and Endocrine Imbalance
… dynamics. Some of these observations include seasonal changes in breeding (Venables and Venables, 1952; Perry, 1945; Watson, 1950; Harrison, 1951; Davis and Hall, 1948, 1951; Newson, 1963; Kalela, 1962; Mullen, 1964; Beveridge, 1965; Chitty and Phipps, 1966)5 behavioral alterations (Calhoun, …
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Seasonal variations in concentrations of circulating thyroid hormones and their relationships to diet in the white-tailed deer
Three experiments were conducted to determine the effect of energy, protein, sex, and time on serum T4 and T3 concentrations. All sampling periods occurred at 28-day intervals. In the first experiment, (March-February) 7 adult bucks were placed on 2 feed levels, ad libitum or 25% restricted. Feed …
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Overcoming the seasonal variations in fitness of the amphipod Corophium Volutator as an environmental toxicology test species using laboratory cultured specimens.
… test species. Historical data has indicated that seasonal variations in the fitness of C. volutator may make toxicity testing impossible during summer months. C. volutator were cultured in the laboratory to determine if variations in the fitness of wild C. volutator could be overcome with the use …
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Ice and the apparent variation of GPS station positions for Alaska
Most GPS stations in Alaska show apparent seasonal variations on the order of one centimeter. The majority of these stations move downwards throughout the winter, a motion which is in phase with regional snowfall and has been attributed to hydrological loading (Fu et. al., 2012). The range of …
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Organisch-geochemische Untersuchungen der Oberflächengewässer aus dem Einzugsgebiet der Sielacht Esens (Ostfriesland)
… DOM analysis do not indicate significant seasonal variations. The compound class distribution of free lipids in the particulate organic matter (POM) has proven to be more suitable to reveal regional and seasonal variations. Parameters deduced from specific lipids clearly reflect seasonal …
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Pore water biogeochemistry and trace metal dynamics in deep intertidal flat sediments
… and hydrological conditions explain spatial variations in pore water depth profiles of margins compared to central parts of tidal flats as well as of sand and mixed flats. The deep pore water studies illustrate that seasonal variations of sulphate, DOC, and nutrients are not limited to the …
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The Differential Effects of Alternating Schedules of Feedback on Employee Productivity
… for weighting production did not account for seasonal variations in the difficulty of the workload. Thus, it was impossible to prove the effectiveness of the procedures. Recommendations. Future studies of complex production behaviors must have a valid basis for equating seasonal variations in …
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Spatial and temporal variations in rocky intertidal communities
… in the Cape Peninsula in terms of spatial and seasonal variations in rocky shore communities and falls into two distinct parts: 1. A general survey of intertidal conditions and an investigation of the interactions of certain physical factors on rocky shore communities. 2. An investigation of …
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ΜΕΛΕΤΗ ΟΡΜΟΝΩΝ ΤΟΥ ΘΥΡΕΟΕΙΔΗ ΣΤΗΝ ΙΡΙΔΙΖΟΥΣΑ ΠΕΣΤΡΟΦΑ, ΜΕ ΜΕΤΑΘΕΣΗ ΤΗΣ ΓΕΝΕΤΙΚΗΣ ΩΡΙΜΟΤΗΤΑΣ ΑΠΟ ΤΡΟΠΟΠΟΙΗΣΗ ΤΗΣ ΦΩΤΟΠΕΡΙΟΔΟΥ
… DURING THE 1ST AND 2NDREPRODUCTIVE CYCLE. TWO SEASONALLY-CHANGING PHOTOPERIOD REGIMES WERE USED. BOTH STRAINS RESPONDED SIMILARLY TO THE CHOSEN ARTIFICIAL REGIME. EXPOSURE OF TROUT TO THE "LONG" SPRING DAYS PROTOCOL ACCELARATED SPAWNING 8-13 WEEKS AND EXTENDED (ABOUT FOUR FOLDS) THE DURATION OF …
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Seasonality of prices, marketings and cash production costs of broilers in the 10-county Shenandoah Valley area, 1951-1956
… was undertaken to determine the influence or seasonality on marketings, farm price and cash production cost of broilers in the 10-County Shenandoah Valley Area, The association between the seasonal pattern of broiler marketings and the seasonal variation in broiler prices and the relationship …
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Satellite derived sea surface temperature and wind field variability in the Benguela upwelling region
… along most of the coast south of 16 °S, seasonal variations were observed for both the SST and the upwelling favorable wind conditions. Inter-annual variability is common, and with these datasets it was possible to highlight periods of anomalous conditions. Results indicated that both the …
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