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 78 for “"Principle component analysis"”.
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Determining the most appropriate criteria for selection to Brigadier General.
… criteria determination was based on results from principle component analysis, variable cluster analysis, and a subjective analysis of the General Officers' comments.
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An exploratory study of deliberate self-harm in a South African student population
… South African student population (n = 603) using Principle Component Analysis (PCA). A battery of instruments, including the Deliberate Self-Harm Inventory (DSHI) and the Functional Assessment of Self-Mutilation (FASM) were administered to students. Following Nock and Prinstein’s (2004) …
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Motion Detection in Dynamic Cardiac Positron Emission Tomography Images
… marker motion. Lastly, we tested the idea that principle component analysis may be able to detect heart motion in dynamic 82Rb PET based on patterns in the residue image.Overall, this thesis proposes low-cost, fast, and vendor independent post-reconstruction dynamic 82Rb PET motion detection …
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Prothonotary Warbler (Protonotaria citrea) Plumage as an Indicator for Infection: the Relationship between Haemosporidia Infection and Breast Feather Reflectance in a Neotropical Migrant Passerine
… (n=41). Reflectance was characterized using a Principle Component Analysis evaluating Intensity, Brightness, Hue, UV Intensity, UV Brightness, and UV Chroma. UV and visible light reflectance was higher in birds sampled earlier in the field season (early clutch) (p=0.0017 and p=0.0743 …
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Assessing the Effectiveness of Louisiana's Freshwater Diversion Projects Using Remote Sensing
… IR/R, Sqrt IR/R, T-NDVI, and NDWI, as well as principle component analysis. The resulting enhanced images were classified into two classes, vegetation or open water. The ratios of vegetation to open water were then calculated and the changes graphed over the 1974-2006 timeframe. The results …
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Assessment of chemical markers as surrogates for efficacy and safety of Rooibos extracts
… plant batches of green rooibos. HPLC-DAD analysis was performed to quantify aspalathin and other major flavonoids present in the extracts. A radioimmunoassay was used to measure 2-deoxy-[3H]-D-glucose absorption in C2C12 murine skeletal muscle and C3A human liver cells, exposed to 10 μg/mL …
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Morphological and molecular analyses for the characterization of Aspalanthus linearis (Fabaceae: rooibos)
… sequence repeats (ISSR) and a plastid marker. A principle component analysis (PCA) based on seven morphological variables grouped the samples into three different growth forms, specifically an erect-form, a prostrate-form and a shrub-form. The genetic variability of four plastid markers and one …
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Influence of Human Recreational Activities and Vegetative Characteristics on Waterbird Abundance
… and abundance using multi-variate statistics. A Principle Component Analysis test was run to analyze the difference between the three a priori reaches of the river, divided by the amount of disturbance present, as well as variance partitioning, a test utilizing the Canonical Correspondence …
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Automatically Locating Sensor Position on an E-textile Garment Via Pattern Recognition
… activity. The software design incorporates principle component analysis using singular value decomposition to identify the location of the sensors. This thesis presents a method to overcome the problem of bilateral symmetry through sensor connector design and sensor orientation detection. …
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An alternative hypothesis for explaining anomalies in the fine scale distribution patterns of Colophospermum mopane : Are shrub and tree forms genetically distinct ?
… when grouped by growth form or by habitat in an analysis of molecular variance (AMOV A). Soil profile and xylem pressure potential data also did not explain the distribution of growth forms. A principle component analysis and a discriminant analysis of five leaf and branching characters …
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A Study of Dimensionality Reduction Techniques and its Analysis on Climate Data
… features in the data to reduce dimensionality. Principle component Analysis is one such method that exploits the variance in data to embed data onto a lower dimensional space called the principle component space. These are linear techniques which can be expressed in the form B=TX where T is the …
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Inertial iterative thresholding with applications to sparse and low-rank signal recovery
… of revealed entries. A third example is robust principle component analysis (RPCA) where one is given a data matrix and would like to decompose it into a low-rank component and a sparse component. Other examples include total variation denoising and deblurring, and L`1-regularized regression. …
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Comparision of the value of several analytical techniques for the discrimination of different papers
… were carried out of the results. This included principle component analysis. Some discrimination was achieved using some of the techniques. TLC, XRF and IItMS provided good discrimination of the samples. HPLC, Pyrolysis-GCMS, and Raman spectroscopy were not as successful. There is no single …
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An Empirical Analysis of Rating Effectiveness for a State Quality Award
… Range restriction (measured by variance analysis for each dimension) was present for 22 of 32 cases, and differed by dimension. A post-hoc principle component analysis indicated poor internal reliability for the rating scale. To improve, the SQA should replace the existing rating scale …
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Effects of Manufacturing Deviations on Core Compressor Blade Performance
… quantified with a statistical method known as principle component analysis (PCA). MISES, an Euler solver coupled with integral boundary-layer calculations, is used to analyze the effects that the aforementioned deviations have on compressor blade performance when the inlet flow conditions …
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Internalizing symptoms, medication adherence, and perceived social support in individuals with inflammatory bowel disease
… adherence rating scale (MARS) generated by principle component analysis. It is important to note that future research should include a more randomized, representative sample, allowing for more conclusive findings. Understanding the psychological impact associated with this disease provides …
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Kerangka kemahiran employability senibina graduan politeknik
… empirikal dengan memenuhi kriteria analisis Principle Component Analysis (PCA). Di akhir kajian, pengkaji telah menghasilkan kerangka Ar–ES untuk graduan politeknik bagi memenuhi kehendak firma binaan Malaysia. Penghasilan kerangka ini diharap dapat membantu meningkatkan kebolehpasaran …
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Characterizing motor control signals in the spinal cord
… signal using a combination of time-frequency analysis, Principle component analysis and linear filters. Neural-force mapping obtained at one location are subsequently applied to isometric data recorded at other locations. Prediction errors exhibited negative relationship with the isometric …
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Nymphaea odorata (Water-lily, Nymphaeaceae): Analyses of molecular and morphological studies
… polymorphisms, which upon SAHN clustering and principle coordinate (PCOA) and minimum spanning tree (MST) analyses produced groups similar to the clades in the ITS phylogeny. Sixteen accessions were chosen for trnL-F analysis, where a subspecies-specific molecular marker was found. In most …
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