Sökning: "David Roc Roc"

Hittade 3 uppsatser innehållade orden David Roc Roc.

  1. 1. Neuropsychiatric Symptoms in Alzheimer's Disease: Associations with Beta Amyloid and Potential New Cutoff Points on Neuropsychiatric Assessment Scales

    Master-uppsats, Lunds universitet/Institutionen för psykologi

    Författare :David Christopher Wimmer; [2023]
    Nyckelord :Alzheimer s disease; dementia; neuropsychiatric symptoms; apathy; cognitively healthy; cognitively impaired; ROC analysis; Social Sciences;

    Sammanfattning : Neuropsychiatric Symptoms (NPS) have been shown to be associated with Alzheimer's disease ( AD). They negatively affect disease outcome and could play a future role in the detection of prospective AD cases. LÄS MER

  3. 2. Credit risk modelling and prediction: Logistic regression versus machine learning boosting algorithms

    Kandidat-uppsats, Uppsala universitet/Statistiska institutionen

    Författare :Linnéa Machado; David Holmer; [2022]
    Nyckelord :Machine learning; Credit risk; Logistic regression; Decision trees;

    Sammanfattning : The use of machine learning methods in credit risk modelling has been proven to yield good results in terms of increasing the accuracy of the risk score as- signed to customers. In this thesis, the aim is to examine the performance of the machine learning boosting algorithms XGBoost and CatBoost, with logis- tic regression as a benchmark model, in terms of assessing credit risk. LÄS MER

  4. 3. Above-ground biomass estimation in boreal productive forests using Sentinel-1 data

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :David Roc Roc; [2019]
    Nyckelord :synthetic aperture radar SAR ; backscatter intensity; InSAR; interferometric coherence; LIDAR; above-ground biomass; forestry;

    Sammanfattning : Estimation of biomass has high importance for economic, ecologic and climatic reasons due to the multiple ecosystem services offered by forested landscapes. Measurements that are taken in the field incur personal and economic costs. Nevertheless, biomass surveying based on remote sensing techniques offer efficiency thanks to covering large areas. LÄS MER