Showing 1,201 - 1,220 results of 1,228 for search '"principal component analysis"', query time: 0.08s Refine Results
  1. 1201

    Temporal Dynamics and Electronic Nose Detection of Stink Bug-Induced Volatile Emissions from Cotton Bolls by David C. Degenhardt, Jeremy K. Greene, Ahmad Khalilian

    Published 2012-01-01
    “…Feeding by stink bugs led to an approximate 2.4-fold increase in volatile organic compound (VOC) emissions. Principal components analysis of E-nose sensor data showed distinct (100%) separation between stink bug-injured and healthy bolls after two days of feeding. …”
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    Article
  2. 1202

    Simultaneous Analysis of Twelve Bile Acids by UPLC-MS and Exploration of the Processing Mechanism of Bile Arisaema by Fermentation by Qimiao Zhao, Guoshun Shan, Dan Xu, Hui Gao, Ji Shi, Chengguo Ju, Guimei Lin, Fan Zhang, Tianzhu Jia

    Published 2019-01-01
    “…Chemometric methods, hierarchical clustering analysis (HCA), and principal components analysis (PCA) were successfully used to optimize the fermentation time of the Bile Arisaema. …”
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    Article
  3. 1203

    Trends in Extreme Precipitation Indices in Iran: 1951–2007 by Robert C. Balling, Mohammad Sadegh Keikhosravi Kiany, Shouraseni Sen Roy, Javad Khoshhal

    Published 2016-01-01
    “…The seven different precipitation indices include annual precipitation total, number of days above a certain threshold, maximum precipitation received over a certain period of time, maximum one-day precipitation, and number of days with precipitation above the 90th percentile. A principal components analysis reveals one eigenvector explaining much of the variance in the seven indices and reveals that this component exhibits a strong upward trend for the whole of Iran. …”
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    Article
  4. 1204

    Discomfort Intolerance Scale: A Study of Reliability and Validity by Kadir ÖZDEL, Özden YALÇINKAYA ALKAR, Ýbrahim TAYMUR, M. Hakan TÜRKÇAPAR, Erkut ZAMKI, A. Emre SARGIN

    Published 2012-04-01
    “…Results: To assess construct validity of DIS, factor analyses were performed using varimax principal components analysis with varimax rotation. The factor analysis resulted in two factors named “discomfort (in) tolerance” and “discomfort avoidance”. …”
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    Article
  5. 1205

    Distress Tolerance Scale: A Study of Reliability and Validity by Ahmet Emre SARGIN, Kadir ÖZDEL, Çisem UTKU, Erkan KURU, Özden YALÇINKAYA ALKAR5, M. Hakan TÜRKÇAPAR

    Published 2012-12-01
    “…Results: To assess construct validity, factor analyses were performed using varimax principal components analysis with varimax rotation. While there were factors in the original study, our factor analysis resulted in three factors. …”
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    Article
  6. 1206

    Impact of No-Tillage and Conventional Tillage Systems on Soil Microbial Communities by Reji P. Mathew, Yucheng Feng, Leonard Githinji, Ramble Ankumah, Kipling S. Balkcom

    Published 2012-01-01
    “…Results of principal components analysis based on soil physicochemical and enzyme variables were in agreement with those based on PLFA and ARISA profiles. …”
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    Article
  7. 1207

    Spectroscopic investigation of the ultrasound impacts on the molecular structures of blood proteins by Aysh Y. Madkhli, Waad A. Al-Otaibi, Sahar M. AlMotwaa, Amal Mohsen Alghamdi, Norah T.S. Albogamy, Manal A. Babaker, Eida M. Alshammari, Mohammed J. Al Nahari, Abdu Saeed

    Published 2025-06-01
    “…Multivariate analyses, including hierarchical cluster analysis (HCA) and principal components analysis (PCA), were performed to distinguish between the spectroscopic data of control samples and those exposed to LFUWs. …”
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  8. 1208
  9. 1209

    New banded Leporinus (Characiformes: Anostomidae) from the Madeira River basin, Brazil, and redescription of L. bleheri, based on integrative taxonomy by Mariana Pascoal Boaretto, Willian Massaharu Ohara, Lenice Souza-Shibatta, José Luís Olivan Birindelli

    Published 2025-01-01
    “…Morphometric data were used to perform a Principal Components Analysis (PCA). Both species specimens were cleared and double-stained for osteological description. …”
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    Article
  10. 1210

    Fractionation of rare earth elements in tropical soils from marine mudstone along a toposequence by Marvin D. Cascante, Cho-Yin Wu, Zeng-Yei Hseu

    Published 2025-01-01
    “…The clustering of the samples in the principal components analysis was not observed in the distinguished prevalence of total REEs, LREEs, HREEs, and REEs fractionations, demonstrating the indirect control of the general properties to the behavior of REEs in the soils derived from marine sediments.…”
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  11. 1211

    Further Validation of the Norwegian Self-Efficacy for Therapeutic Mode Use by Victoria C. Ritter, Mikkel M. Thørrisen, Farzaneh Yazdani, Tore Bonsaksen

    Published 2017-01-01
    “…Component structure was analyzed with Principal Components Analysis (PCA), internal consistency of scales with Cronbach’s α, and associations between scale scores with Pearson’s r. …”
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    Article
  12. 1212

    Salivary Metabolomics of Well and Poorly Controlled Type 1 and Type 2 Diabetes by Sompop Bencharit, James Carlson, Warren C. Byrd, Escher L. Howard-Williams, Jackson T. Seagroves, Susan McRitchie, John B. Buse, Susan Sumner

    Published 2022-01-01
    “…Unsupervised principal components analysis (PCA) and orthogonal partial least squares regression discrimination analysis (OPLS-DA) were used to define unique metabolomic profiles associated with well and poorly controlled diabetes based on A1C levels. …”
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    Article
  13. 1213

    Discomfort Intolerance Scale: A Study of Reliability and Validity by Kadir ÖZDEL, Özden YALÇINKAYA ALKAR, İbrahim TAYMUR, M. Hakan TÜRKÇAPAR, Erkut ZAMKI, A. Emre SARGIN

    Published 2012-03-01
    “…Results: To assess construct validity of DIS, factor analyses were performed using varimax principal components analysis with varimax rotation. The factor analysis resulted in two factors named “discomfort (in) tolerance” and “discomfort avoidance”. …”
    Get full text
    Article
  14. 1214

    Nonlinear modeling of oral glucose tolerance test response to evaluate associations with aging outcomes. by Grant Schumock, Karen Bandeen-Roche, Chee W Chia, Rita R Kalyani, Luigi Ferrucci, Ravi Varadhan

    Published 2024-01-01
    “…First, we fit OGTT curves with the Ackerman model-a nonlinear, parametric model of the glucose-insulin system-and with functional principal components analysis. We then fit linear and Cox proportional hazards models to evaluate whether usual gait speed and survival are associated with the stage-one model summaries. …”
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    Article
  15. 1215

    Predefined and data-driven CT radiomics predict recurrence-free and overall survival in patients with pulmonary metastases treated with stereotactic body radiotherapy. by Pascal Salazar, Patrick Cheung, Balaji Ganeshan, Anastasia Oikonomou

    Published 2024-01-01
    “…First-order radiomic features were extracted using two methods: 2D CT texture analysis (CTTA) using TexRAD software, and a data-driven technique: functional principal components analysis (FPCA) using segmented tumoral and peri-tumoural 3D regions.…”
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  16. 1216

    Distress Tolerance Scale: A Study of Reliability and Validity by Ahmet Emre SARGIN, Kadir ÖZDEL, Cisem UTKU, Erkan Kuru, M.Hakan Turkcapar

    Published 2012-11-01
    “…Results: To assess construct validity, factor analyses were performed using varimax principal components analysis with varimax rotation. While there were factors in the original study, our factor analysis resulted in three factors. …”
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    Article
  17. 1217

    Floristic Inventory and Diversity Assessment at Two Locations along the Shores of Cape Coast, Ghana by Gertrude Lucky Aku Dali, Sethiler Arthur, Paul Kwame Essandoh

    Published 2024-01-01
    “…Parameters between the two locations were compared with a t-test, whereas variations in the distribution of the species were determined with principal components analysis (PCA), using Minitab and R statistical software, respectively. …”
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    Article
  18. 1218

    Determination of seed yield, quality and fixed oil components of different basil (Ocimum basilicum L.) genotypes: Evaluation of fatty acid profile by PCA biplot analysis by Musa Türkmen, Esra Nermin Ertekin, Yusuf Ziya Aygün, Yılmaz Eren

    Published 2022-09-01
    “…In results of principal components analysis (PCA) purple and green basil types demonstrated different features in terms of fixed oil components. …”
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  19. 1219

    STATUS EKOSISTEM PESISIR BAGI PERENCANAAN TATA RUANG WILAYAH PESISIR DI KAWASAN TELUK AMBON by YULIA Asyiawati, FREDINAN YULIANDA, ROKHMIN DAHURI, SANTUN R.P. SITORUS, SETYO BUDI SUSILO

    Published 2021-10-01
    “…The analytical method used in this study is the analysis of ecosystem status, principal components analysis, analysis of Geographic Information Systems (GIS) and analysis of dynamic systems. …”
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  20. 1220

    Filling the Atlantic coastal tree-ring reconstruction gap: A 195-year record of growing season discharge of the Sainte-Anne River, Gaspésie, Québec, Canada by A.V. Pace, J.-M. St-Jacques, D.D. Noel, G. Fortin

    Published 2025-04-01
    “…Our Gaspésie reconstruction showed droughts and pluvials in common with multi-centennial river/moisture reconstructions along the Atlantic Seaboard from New York, Delaware and Maryland and from north-central Québec. A principal components analysis (PCA) and correlation analysis with GRUN (the 5°x5° gridded multi-model ensemble of runoff of Ghiggi et al. (2019. …”
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    Article