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 22 for “"Trajectory modeling"”.
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Aircraft conflict analysis and real-time conflict probing using probabilistic trajectory modeling
… on the errors and uncertainties from the working trajectory model used to estimate future aircraft positions. The more accurate the prediction, the more likely an ideal (no false alarms, no missed detections) alerting system can be designed. Additional insights into the problem were brought forth …
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MULTIVARIATE FINITE MIXTURE GROUP-BASED TRAJECTORY MODELING WITH APPLICATION TO MENTAL HEALTH STUDIES
… two kinds of methods are applied in trajectory analysis: 1) hierarchical modeling based on a multilevel structure, or 2) latent growth curve modeling (LGCM) based on a covariance structure (Raudenbush & Bryk, 2002; Bollen & Curran, 2006). However, this thesis used a third trajectory …
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Association between early maternal depression and child growth: A group-based trajectory modeling analysis
… from birth to age 9; 4) Differences in growth trajectory solutions by race/ethnicity; and 5) Common and unique risk factors that predict at-risk growth among children from different racial/ethnic groups. This study used data from the Fragile Families Child Well Being Study (FFCWS) to …
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Novel Statistical Methodologies in Analysis of Position Emission Tomography Data: Applications in Segmentation, Normalization, and Trajectory Modeling
… are variations from a template density. By modeling the warping functions using a modified function-on-scalar regression, the variations in density functions due to nuisance parameters are estimated and subsequently removed for normalization. Application to our motivating data indicate …
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Human Interaction Recognition with Audio and Visual Cues
… Despite the sizable progress made in the area of modeling and recognizing group activities, and actions performed by people in isolation from video, the availability of audio cues has rarely being leveraged. This is even more so in the area of modeling and recognizing binary interactions between …
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Studies of Arctic Tropospheric Ozone Depletion Events Through Buoy-Borne Observations and Laboratory Studies
… extents of ODEs were estimated using air mass trajectory modeling to assess whether they are a localized or synoptic phenomenon. Results indicate that current understanding of the responsible chemical mechanisms are lacking, ODEs are observed primarily due to air mass transport (even in the …
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Addressing Deficiencies from Missing Data in Electronic Health Records
… data-driven clinical decision support, patient trajectory modeling, etc. However, it is common that EHRs data contain substantial missing information that could make the clinical prediction tasks more challenging if left unaddressed. This thesis focuses on the problem of multivariate data …
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Trajectories and Transitions: Exploration of Gender Similarities and Differences in Offending
… qualitative dimensions of offending; (2) modeling how patterns of offending change over time; and (3) exploring factors related to patterns of offending. This is a secondary analysis of data from the Edinburgh Study of Youth Transition and Crime, a longitudinal study consisting of a cohort …
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Do Childhood Excess Weight and Family Food Insecurity Share Common Risk Factors in the Local Environment? An Examination Using a Quebec Birth Cohort
… as a function of place factors using group-based trajectory modeling. The third and final analysis examined change in family food insecurity status as a function of the place factors using generalized estimating equations. Results: Social deprivation, social cohesion and disorder were strongly and …
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Trajectories of Glycemic Control with Clinical Pharmacy Specialist Management of Veterans with Type 2 Diabetes
… HbA1c trajectories over time using group-based trajectory modeling and posterior probabilities of group membership. Characteristics associated with successful HbA1c trajectories and association of assigned trajectories with all-cause and diabetes-related hospitalizations were analyzed using …
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Precipitation amount, altitude, and moisture trajectory effects on the stable isotopic composition of precipitation in the Galapagos Islands
… by 0.2‰/100 m elevation. HYSPLIT backward trajectory modeling reveals important differences in how the path of atmospheric moisture affects stable isotope ratios in precipitation in the eastern equatorial Pacific and western equatorial Pacific. No significant relationship between moisture …
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Thrown off Course: School Suspension and Its Consequences for Students’ Educational Trajectories and Outcomes
… through middle and high school. Multilevel modeling and regressions with clustered standard errors are used to examine factors related to suspension experiences. Next, multi-trajectory modeling is used to determine students’ educational trajectories of school engagement (i.e. GPA, …
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Dynamic and Static Correlates of Adolescent Physical Activity: A Latent Trajectory Analysis
… obesity among today’s youth. Understanding the trajectory of change in physical activity and the influences of change has potential for informing future interventions and policy. </p><p>PURPOSE: The purpose of this research was to examine trajectories of physical activity across adolescence and …
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Predictors and Mediators of Long-term Functional Limitations in the Older Adult Population
… Study (HRS) was analyzed using group-based trajectory modeling and mediation analysis.</p> <p>The trajectory analysis identified five distinct functional trajectories with the following characteristics: Trajectory 1- consistently low functional limitations scores (18.9%), Trajectory 2- …
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Sources and Transport of Black Carbon at the United States-Mexico Border near San Diego-Tijuana
… Mexico at only one site. The majority of the trajectory analyses indicate that there is often transport from Tijuana into the US, crossing the border in a northeasterly direction to the east of San Diego-Tijuana and sometimes as far east as Imperial County at the eastern edge of California. …
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Patient Perspectives, Follow-up Patterns, and Cost-Effectiveness of a Low-Threshold Mobile Medical Unit
… model addressed access barriers. Group-based trajectory modeling was used to identify patterns in patient follow-up with the mobile unit and examine patient characteristics associated with certain follow-up patterns. Five follow-up patterns were identified: slow decline, fast decline, …
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Developmental Trajectories of Physical Aggression in Low-Income African American and Hispanic Children: Relations to Household Risk and Child Inhibitory Control
… and in first grade. Using group-based trajectory modeling, a model consisting of four trajectories of physical aggression was selected. The model identified a no physical aggression group (18%), a low declining group (41%), a high declining group (32%), and a high chronic group (9%). …
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Near-surface Atmospheric Response to Simulated Changes in Land-cover Vegetation Fraction, and Soil Moisture over Western Kentucky
… air quality, and climatology perspectives. Modeling analysis revealed the importance of land-use on atmospheric processes. Changes in all three types of LULCC (land-cover, FV, and SM) altered the distribution of surface energy and moisture, PBL structure, 3D-wind fields, and PBL stability. …
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Labor Force Participation and Crime among Serious and Violent Former Prisoners
… weak treatment effects. It uses group-based trajectory modeling and propensity score methods to balance participants and nonparticipants on demographic and criminal risk factors. Lifetime arrest data from administrative records are used to model respondents' prior offending trajectories. …
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A Data Driven Modeling Approach for Store Distributed Load and Trajectory Prediction
… is available through data-driven surrogate modeling of store distributed loads. This dissertation investigates the practicality of applying various data-driven modeling techniques to the field of store separation. These modeling methods will be applied to four demonstration scenarios: …
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