Essays about: "variance components"

Showing result 1 - 5 of 68 essays containing the words variance components.

  1. 1. Heritability of methane emission in Swedish Red cattle in northern Sweden

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Lucy Chipondoro; [2024]
    Keywords : methane emission; heritability; swedish Red cattle; dairy cow;

    Abstract : Dairy cattle contribute a significant proportion of greenhouse gases (GHG), mainly methane (CH4), among other livestock species. Methane has a negative impact on climate; therefore, its reduction is a top priority for a sustainable dairy production system. READ MORE

  3. 2. A Machine Learning Approach to Skin Cancer Delineation on Photoacoustic Imaging

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation

    Author : Alice Fracchia; [2023]
    Keywords : Skin cancer; carcinoma; photoacoustic imaging; ultrasound imaging; machine learning; dimensionality reduction; sandpiles algorithm; active contour; multilayer perception MLP ; convolutional neural networks CNN ; autoencoder; Physics and Astronomy;

    Abstract : Skin cancer is a growing public health concern due to its prevalence among the population. Current clinical procedures require high invasiveness and multiple surgeries, which are responsible for patient discomfort and high medical expenses. READ MORE

  4. 3. Public Domain Intelligence Tests: Psychometric properties of the Cog15 and ICAR16 cognitive ability scales

    University essay from Lunds universitet/Institutionen för psykologi

    Author : Dagný Kristjánsdóttir; Aya Zaiter; [2023]
    Keywords : general intelligence; intelligence testing; public domain; CFA; PCA; Social Sciences;

    Abstract : The current paper aims to explore the psychometric properties of two public domain cognitive ability scales, Cog15 and ICAR16, and investigate how well they each capture the g-factor in a Swedish sample (N = 428). The motivation for choosing these aims is that public domain, free, and easily accessible intelligence tests are needed for measuring the g-factor. READ MORE

  5. 4. Fungal pigmentation responses to microclimatic variables in isolated forest patches in Northern Sweden

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Karl Soler Kinnerbäck; [2023]
    Keywords : fungal ecology; mycology; functional traits; communities; pigmentation; CIELAB; lightness; microclimate; polypores;

    Abstract : Investigating functional traits is an important tool for understanding fungal communities, yet ecological functions of fungal pigmentation remain poorly investigated. Recent studies support the thermal-melanism hypothesis for fungal color lightness in relation to macroclimate, but it remains unclear if microclimate also affects fungal pigmentation. READ MORE

  6. 5. Dynamic Covariance Modelling Using Generalised Wishart Processes

    University essay from Lunds universitet/Matematisk statistik

    Author : Fredrik Nilsson; [2023]
    Keywords : Covariance matrix; generalised Wishart process; Bayesian inference; Markov chain Monte Carlo; Hamiltonian Monte Carlo; Mathematics and Statistics;

    Abstract : Modern portfolio theory was pioneered by Markowitz who formulated the mean-variance problem, without which any discussion on quantitative approaches to portfolio selection would be incomplete. The framework boils down to finding the expected return $\mu$ and covariance $\Sigma$, after which the solution is proportional to $\Sigma^{-1}\mu$. READ MORE