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.
Results
Showing 1 to 20 of 77 for “"External validation"”.
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Can cied-derived physical activity provide as a biomarker to predict all-cause-mortality? validation of previous predictive modelling approaches.
… electronic device (CIED)-derived PA levels lacks external validation when predicting mortality. The primary aim was to investigate the relationship between CIED-derived PA and all-cause mortality. The secondary aim was to replicate and externally validate predictive models incorporating PA to …
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Improving Mealtime Oral-Motor Function Through Prefeeding Myofunctional Therapy and Jaw Stabilization Feeding Techniques
… determined by a panel of naive observers. This external validation was designed to evaluate the program's effectiveness with regard to the overall appearance of the children during the feeding experience.
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Nutrient Drug Interaction Probability Scale (NDIPS): A Creation and Validation Process
… to assess the probability of DNIs. An internal validation process was conducted by testing the NDIPS on published case reports describing DNIs. An external validation to assess consistency in question interpretation involved practicing clinicians who used the NDIPS to assess a selected case …
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Towards short-term forecasting of ventricular tachyarrhythmias
… although promising, still require thorough external validation. An important contribution of this work is the experimental procedure itself, which can be easily reproduced and expanded to search for more complicated patterns.
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Assessing measurement invariance in long and short forms of the BIS/BAS scales across demographic subgroups with validation via impulsivity and internalizing and externalizing problem scales.
… tested and corrected for measurement invariance. External validation of adjusted factor scores (correcting for measurement error) via correlational analyses with related constructs, which also underwent invariance testing, showed similar, or greater associations with related constructs. Findings …
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Risk prediction models for hip fracture: parametric versus Cox regression
… did not differ in c-index and ten-fold cross validation showed similar areas under the ROC curves. Conclusion: Parametric and Cox models were comparable. External validation of the prediction model is required.
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Development and Evaluation of Risk Models to Predict Readmission or Death Following Discharge from an Adult General Systems Intensive Care Unit
… coefficients [Derivation Cohort]), 3) validation of the models in an external Validation Cohort. The models for ICU Readmission showed limited discriminative ability whereas the Post-ICU Mortality models were stronger. Developing prediction models using pooled measures of association is …
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Bayesian models for unmeasured confounder in the analysis of time-to-event data.
… adequately decrease the bias, even with a small validation size. Furthermore, we offer a novel Bayesian bias adjustment model when only summary statistics are available in the external validation data. Finally, we discuss and obtain several sets of solutions for different sources of validation …
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A Transformer-Based Foundation Model for Human Microbiome Analysis
… healthy and diseased samples in 10-fold cross-validation on the training dataset with an accuracy of 83.7%. On an external validation dataset of 927 samples, our model had an accuracy of 74.9%. Notably, our model performed even better at differentiating diseases from one another. On the …
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The integration of fine-scale DNA-DNA associations by inclusion of Hi-C DNA cross-linking information into metagenomic community analysis
… constructed and quality assessed using a novel external validation measure supporting overlapping clusters and variable object weights. This work led to the design and implementation of the first metagenomic Hi-C read-pair simulator, sim3C, capable of simulating complex community definitions and …
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Novel topography-based classification for mountain basins: utility and limitations of unsupervised machine learning, A
… This study is somewhat unique in that I use an external validation method to determine the extent to which the K-means clustering produced meaningful categories. This external validation method indicated no differences between clusters and that the K-means algorithm did not create meaningful …
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Prediction of HPLC Retention Index Using Artificial Neural Networks and IGroup E-State Indices
… = 0.65, mean absolute error (MAE) = 83 RI units. External validation of 104 compounds not used for model development yielded validation v2 = 0.49 and MAE = 73 RI units. The distribution of residuals for the fit and validate datasets suggest a non-linear relationship between retention index and …
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Psychological Health in Companies. An investigation into the relationships between work characteristics, job roles and psychological health in companies.
… the `attribution of blame¿ and `need for external validation¿, and the different moderator and mediator roles they play for males and females. The study contradicts the assertion that the psychological health of workers and managers is similar, if not the same, and uses the differences …
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Sybil: Predicting Future Lung Cancer Risk From a Single Low-Dose Chest Computed Tomography
… on MGH and 0.94 (95% CI 0.91, 1.00) on CGMH external validation sets. Concordance indices over six years were 0.75 (95% CI 0.72, 0.78), 0.81 (95% CI 0.77, 0.85), and 0.80 (95% CI 0.75, 0.86) for NLST, MGH, and CGMH, respectively. The model is publicly available at …
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The Influence of Masculinity on Self-Authorship in College Men
… development in people as they transition from externalized to internalized ways of knowing (Baxter Magolda, 2009). The purpose of this qualitative study was to explore how constructs of masculinity influence Self-Authorship in college men. The conceptual framework for this study was Baxter …
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Development and validation of a biomarker-based model to predict persistent hypoxemic respiratory failure among mechanically ventilated adults
… prospective cohorts (discovery cohort n = 632, validation cohort n = 906). I used generalized linear models to estimate the relative risk (RR) of persistent HRF compared to resolving HRF in each cohort, adjusting for age, sex and the acute physiology and chronic health evaluation score …
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Improving Model Generalization of Pneumonia Detection from Chest Xray Images Using Deep Learning and Transfer Learning
… and further validated using an independent external dataset. Experimental results showed that DenseNet201 consistently outperformed ResNet152, reaching 93.2% accuracy with an AUC of 0.9916 on the main dataset and 88.3% accuracy with an AUC of 0.9742 on the external dataset. By comparison, …
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Latinidad and Agency of Voice: Latina Leader Identity Development
… Latinas cultivate a leader identity through external validation, striving for excellence, and adapting their persona to their professional environments. Over time, Latinas leverage their voice to advocate for themselves and their community. These findings are significant because they can …
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A data driven semantic framework for clinical trial eligibility criteria
… a semantically distinct criterion. Internal and external validation measures provide an objective evaluation of the method. Based on the clustering, an eligibility criteria ontology has been constructed. The resulting model has been incorporated into the development of the MindTrial clinical …
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A small-scale investigation into teachers' access to the regulating principles underlying the "new mathematics" curriculum in the Junior Primary phase
… procedure for their practice and be subject to external validation. This raises questions as to the successful implementation of the curriculum, in that it limits access by teachers to the educational debates surrounding theories of knowledge and theories of learning, and so inhibits teacher …
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