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 20 of 60 for “"Temporal Change"”.
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DENSITY BASED FRAMEWORKS FOR SPATIO-TEMPORAL CHANGE ANALYSIS
Analyzing change in spatial data is important for many different domains such as biology, ecology, meteorology, medicine, transportation, and forestry. On the other hand, density functions have served as a valuable tool in data mining. However, the development of spatiotemporal data mining …
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Temporal change in the Namibian Ju|’hoansi intestinal microbiome
… further exploration. This study aims to detect temporal changes in the Ju|’hoansi IM, while also exploring the impact of water sources on their IM, and the levels of the IM volatile fatty acids. In order to do so, faecal samples were collected and subsequently sequenced from a total cohort of 40 …
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Temporal change of the earth’s inner core from repeating earthquakes
This Thesis was approved for publication on 2017-04-24 at 15:38.
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Habitat driven responses of reef fish: temporal change, niche partitioning and selection
… in response to many stressor-driven effects. The change in turn threatens the associated fish communities relying on their maintenance for habitat provision. At present, a much better understanding of the interaction between changing habitats and the associated fish is necessary. To address the …
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Spatio-temporal change in riparian woodlands of the Kruger National Park: drivers and implications
… possible drivers of riparian woody vegetation change. Aerial and satellite imagery (1936 to 2018) was used to measure changes in the extent of riparian woodland tree cover for 18 approx. 10 km long sites along five perennial and nine non-perennial rivers in KNP. This change was compared in a …
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An investigation of temporal change in lithic technology at Grassridge Rockshelter, Eastern Cape South Africa
This thesis discusses the lithic technological change in Grassridge Rockshelter, a multi-component site located in the interior region of the Eastern Cape of South Africa that presents a rich high-resolution stratigraphy that interchanges with periods of hiatuses between the Late Pleistocene (LP) …
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Investigating temporal change in Fauresmith technology: Insights from Rooidam 2, Northern Cape Province, South Africa
… 10 sub-levels was conducted in order to test for temporal change. Adjacent sub-levels were compared using both quantitative and qualitative data to test for statistically significant changes in the blank production choices and retouched tool morphology within the Fauresmith sequence. The analysis …
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Temporal Change in Community Composition, Ecological Niche, and Phenotypic Selection in Minnesota’s Rare Arctic Relict Plants
… an uncertain future due to anthropogenic climate change. In this study, we used a variety of approaches to examine the contemporary impacts of climate change and to predict how populations will respond in coming decades. To investigate how these arctic relict communities have already changed, we …
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Determinants of pattern in fynbos vegetation: physical site factors, disturbance regime, species attributes and temporal change
… properties of individual species and 4) temporal change in communities. The body of the thesis is divided into four parts covering each of these aspects individually. Each chapter has been written up as an individual paper and thus includes some repetition as well as cross-referencing. …
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Drivers of a Temporal Change in the Adult Sex Ratio of a Population of Roosevelt elk (Cervus elaphus roosevelti)
Ecological processes driving female-biased adult sex ratios (ASR, males:female) in ungulate populations have been addressed theoretically but empirical study is lacking. The female-substitution hypothesis asserts that a female-biased ASR reflects an overall fitness benefit to females and also males …
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Temporal Change in Fish Communities and Modification of the Index of Biotic Integrity for the James River of the Dakotas
Over the past 25 years, the James River has experience records in minimum and maximum discharge. Fluctuations in flow rates over a wet I dry hydrologic cycle result in habitat instability, leading to an unstable, yet persistent, fish community. My first objective was to examine persistence of the …
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Climate and Bioinvasives drivers of change on South African Rocky shores?
… overall aims of the thesis were to assess spatio-temporal change in macro species assemblages at sites located around the South African coast. Detected changes were considered in parallel with regional patterns of bioinvasion and climate change driven shifts in temperature trends over comparable …
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Evaluation of the space-time variability of soil salinity by statistical, geostatistical and bayesian maximum entropy methods
… objectives of this study were: - monitoring the temporal change of the spatial pattern of soil salinity using classical statistical methods; - mapping of soil salinity at unobserved space locations and time instants using classical and modern geostatistical methods like the BME.
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Determination of Aortic Elasticity from MR- and CT- Images Using an Automatic Active Contour Model
The possibility to monitor changes in aortic elasticity in humans has important applications for clinical trials predicting arterial diseases before they become morphologically apparent. The elasticity is usually quantified by compliance measurements. Therefore, the relative temporal change in …
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Tactical Allocation Through the Lens of Correlational Time-Variance, Determinants, and Regimes
… (WC) methodology, where our findings reveal temporal instability. Through a multi-method statistical approach, we present robust and persuasive evidence of macroeconomic factors as determinants of temporal change. Leveraging time-varying Granger causality, we unearth elusive yet significant …
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Exploiting pitch dynamics for speech spectral estimation using a two-dimensional processing framework
… modeling studies implicating the use of temporal changes in speech by humans. Specifically, we develop and evaluate signal processing schemes that exploit temporal change of pitch as a basis for high-pitch formant estimation. As part of our development, we assess the source-filter …
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Baldcypress Growth in South Carolina and Georgia: Lapses in its Correlation with Spring Precipitation
… as being May through August (MJJA).</p> <p>The change in correlation over time of tree growth indices with MAMJ season precipitation is probably climate driven. The signal is evident in all four of the chronologies located across 200 miles of the GA/SC plain and the signal is a sequence of …
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Multi-objective evolutionary optimization in time-changing environments
… to satisfy multiple conflicting objectives that change in time. Since most practical problems involve costly numerical simulations, the goal was to create algorithmic architectures that increase computational efficiency while being robust and widely applicable. A combination of two elements lies …
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New insights into the differential rotation of the inner core
… examine the global and regional patterns of the temporal changes of the IC. We performed extensive analyses on the quality of the repeating earthquakes and quantified the error (σic) of travel time measurements from all possible sources except the IC temporal changes. We set 2σic as a threshold …
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