Vitenskapelig artikkel
-
Eivind Aadland; Olav Martin Kvalheim
(2025). Are associations between physical activity and lipoproteins in children moderated by fitness and fatness?. (ekstern lenke)
-
Øyvind Midttun; H. Kallevik; J. Sjøblom
et al. (2000). Multivarite screening analysis of water-in-oil emulsions in high external electric fields as studied by means of dielectric time domain spectroscopy - III emulsions containing asphaltenes and resins. (ekstern lenke)
-
H. Kallevik; S. B. Hansen; O. Sæther
et al. (2000). Crude oil model emulsion characterised by means of near infrared spectroscopy and multivariate techniques. (ekstern lenke)
-
A. A. Christy; Yi-zeng Liang; C. Hui
et al. (1993). Effect of particle size on diffuse reflectance Fourier-transform infrared spectra of polystyrene spheres. (ekstern lenke)
-
Frode Berven; Ann Cathrine Kroksveen; Magnus Foldal Berle
et al. (2007). Pre-analytical influence on the low molecular weight cerebrospinal fluid proteome. (ekstern lenke)
-
Hailin Shen; Laila Storedrange; Rolf Manne
et al. (2000). Morphological score and its application to chemical rank determination. (ekstern lenke)
-
Lindsay K. Caesar; Olav Martin Kvalheim; Nadja B. Cech
(2018). Hierarchical Cluster Analysis of Technical Replicates to Identify Interferents in Untargeted Mass Spectrometry Metabolomics. (ekstern lenke)
-
Tarja Rajalahti; Chenchen Lin; Svein Are Mjøs
et al. (2016). Serum fatty acid and lipoprotein subclass concentrations and their associations in prepubertal healthy Norwegian children. (ekstern lenke)
-
N. Telnæs; A. Bjørseth; A. A. Christy
et al. (1987). Interpretation of multivariate data: Relationship between phenanthrenes in crude oils. (ekstern lenke)
-
Jostein Toft; Olav Martin Kvalheim
(1992). Eigenstructure tracking analysis for demonstration of heteroscedastic noise in instrumental profiles - application to transmittance and oborbance IR. (ekstern lenke)
-
M. D. Hämäläinen; Yi-zeng Liang; Olav Martin Kvalheim
et al. (1992). Deconvolution in one-dimensional chromotography by heuristic evolving latent projections of whole profiles retention time shifted by Simplex optimization of cross correlation between target peaks. (ekstern lenke)
-
H. R. Keller; Yi-zeng Liang; Olav Martin Kvalheim
et al. (1992). Evolving factor analysis in the presence of heteroscedastic noise. (ekstern lenke)
-
Liangxiao Zhang; Hui Dai; Yizeng Liang
et al. (2010). Detection and use of selective ions for providing initial estimates of the concentration vectors in iterative target transformation factor analysis. (ekstern lenke)
-
Olav Martin Kvalheim; Reidar Arneberg; Bjørn Grung
et al. (2018). Determination of optimum number of components in
partial least squares regression from distributions of
the root‐mean‐squared error obtained by
Monte Carlo resampling. (ekstern lenke)
-
Eivind Aadland; Lars Bo Andersen; Sigmund Alfred Anderssen
et al. (2018). Associations of volumes and patterns of physical activity with metabolic health in children: A multivariate pattern analysis approach. (ekstern lenke)
-
Dalin Yuan; Yizeng Liang; Lunzhao Yi
et al. (2008). Uncorrelated linear discriminant analysis (ULDA): A powerful tool for exploration of metabolomics data. (ekstern lenke)
-
Paul Remy Jones; Tarja Rajalahti; Geir Kåre Resaland
et al. (2022). Associations of lipoprotein particle profile and objectively measured physical activity and sedentary time in schoolchildren: a prospective cohort study. (ekstern lenke)
-
J. Toft; Olav Martin Kvalheim
(1993). Eigenstructure tracking analysis for demonstration of heteroscedastic noise in instrumental profiles - application to transm ittance and aborbance IR. (ekstern lenke)
-
F. O. Libnau; A. A. Christy; Olav Martin Kvalheim
(1995). Determination of the equilibrium constant and resolution of the HOD spectrum by alternating least squares. (ekstern lenke)
-
A. A. Christy; Yi-zeng Liang; Olav Martin Kvalheim
(1991). On-Line pyrolysis of asphaltenes studied by Diffuse reflectance Fourier-transform infrared spectroscopy. (ekstern lenke)
-
F. Brakstad; Olav Martin Kvalheim; K. I. Ugland
et al. (1994). Prediction of the Shannon Wiener index from trace element profiles in sediments around the Statfjord platforms. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim
(1994). Diagnosis and resolution of multiwavelength chromatograms by rank map, orthogonal projections and sequential rank analysis. (ekstern lenke)
-
Eivind Aadland; Olav Martin Kvalheim; Bjørge Hermann Hansen
et al. (2020). The multivariate physical activity signature associated with metabolic health in children and youth: An International Children's Accelerometry Database (ICAD) analysis. (ekstern lenke)
-
B.G. Sæten; Johan Sjöblom; J. Toft
et al. (1997). Complexation between benzoic acid and fatty amines. An adsorption and chemometric study. (ekstern lenke)
-
Warren S. Vidar; Tim U. H. Baumeister; Lindsay K. Caesar
et al. (2022). Interaction Metabolomics to Discover Synergists in Natural Product Mixtures. (ekstern lenke)
-
Alfred A. Christry; Anne K. Nyhus; Bjørn Grung
et al. (1998). Friedel-Crafts Acylation on Porous Divinyl Benzene Polymer Particles: A Reaction Kinetic Process Studied by Mid-and Near-Infrared spectroscopy. (ekstern lenke)
-
Cecilie Sævdal Dybsland; Trine Bekkby; Kjersti Hasle Enerstvedt
et al. (2021). Variation in Phenolic Chemistry in Zostera marina Seagrass
Along Environmental Gradients. (ekstern lenke)
-
Paddy C. Dempsey; Eivind Aadland; Tessa Strain
et al. (2022). Physical activity intensity profiles associated with cardiometabolic risk in middle-aged to older men and women. (ekstern lenke)
-
Jostein Toft; Olav Martin Kvalheim; Fred Olav Libnau
et al. (1994). Non-linear curvefitting of bilinear data using orthogonal projections for rank analysis. Applications to gas chromatography/ infrared spectrometry and variable temperature infrared studies. (ekstern lenke)
-
Tarja Rajalahti; Chenchen Lin; Svein Are Mjøs
et al. (2016). Changes in serum fatty acid and lipoprotein subclass concentrations from prepuberty to adulthood and during aging. (ekstern lenke)
-
Joshua J. Kellogg; Olav Martin Kvalheim; Nadja B. Cech
(2020). Composite score analysis for unsupervised comparison and network visualization of metabolomics data. (ekstern lenke)
-
Yi-zeng Liang; R. G. Brereton; Olav Martin Kvalheim
et al. (1993). Use of chemometrics factor analysis for chromatographic integration: Application to diode-array high-performance liquid chroma tography of mixtures of chlorophyll a degradation products. (ekstern lenke)
-
Olav Martin Kvalheim; Lars Bo Andersen; Eivind Aadland
(2025). An approach to determine the net predictive multivariate association pattern between cardiorespiratory fitness and a high-resolution physical activity spectrum in the presence of multicollinear covariates. (ekstern lenke)
-
Geir Martin Førland; Yi-Zeng Liang; Olav Martin Kvalheim
et al. (1997). Associative Behavior of Benzyl Alcohol in Carbon Tetrachloride Solutions. (ekstern lenke)
-
Geir Rune Flåten; Helge Botnen; Bjørn Grung
et al. (2007). Quantifying disturbances in benthic communities - comparison of the community disturbance index (CDI) to other multivariate methods. (ekstern lenke)
-
Øystein Fluge; K. Gilje; Einar Sletten
et al. (1996). Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia. (ekstern lenke)
-
R. G. Brereton; A. Rahmani; Yi-zeng Liang
et al. (1992). Investigation of the allomerization reaction of chlorophylla: use of diode array HPLC, mass spectrometry and chemometrics factor analysis for the detection of early products. (ekstern lenke)
-
Alfred A. Christy; Olav Martin Kvalheim
(1992). Applications of diffuse reflectance Fourier-transform infrared spectroscopy in petroleum geochemistry. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim; H. R. Keller
et al. (1992). Heuristic Evolving Latent Projection - resolving two-way multicomponent data. Part 2. Detection and resolution of minor component. (ekstern lenke)
-
H. R. Keller; Yi-zeng Liang; Olav Martin Kvalheim
et al. (1992). A comparison of the Heuristic envolving latent projection and evolving factor analysis methods for peak purity control in HPLCDAD. (ekstern lenke)
-
Yi-zeng Liang; Rolf Manne; Olav Martin Kvalheim
(1992). Constrained background bilinearization. (ekstern lenke)
-
Foo-Tim Chau; Hoi-Yan Chan; Chui-Yee Cheung
et al. (2009). Recipe for Uncovering the Bioactive Components in Herbal Medicine. (ekstern lenke)
-
Einar Sletten; Olav Martin Kvalheim; S. Kruse
et al. (1990). Detection of malignant tumors by multivariate analysis of proton magnetic resonance spectra of serum. (ekstern lenke)
-
Geir Rune Flåten; Bjørn Grung; Olav Martin Kvalheim
(2004). Quantification of pollution levels by multiway modelling. (ekstern lenke)
-
Eivind Aadland; John Roger Andersen; Sigmund Alfred Anderssen
et al. (2013). Impact of physical activity and diet on lipoprotein particle concentrations in severely obese women participating in a 1-year lifestyle intervention. (ekstern lenke)
-
Olav Martin Kvalheim
(2012). History, philosophy and mathematical basis of the latent variable approach - from a peculiarity in psychology to a general method for analysis of multivariate data. (ekstern lenke)
-
Emily R. Britton; Joshua J. Kellogg; Olav Martin Kvalheim
et al. (2018). Biochemometrics to Identify Synergists and Additives from Botanical Medicines: A Case Study with Hydrastis canadensis (Goldenseal). (ekstern lenke)
-
Geir Rune Flåten; Bjørn Grung; Olav Martin Kvalheim
(2004). A method for validation of reference sets in SIMCA modelling. (ekstern lenke)
-
Eivind Aadland; Olav Martin Kvalheim; Tarja Rajalahti
et al. (2017). Aerobic fitness and metabolic health in children: A clinical validation of directly measured maximal oxygen consumption versus performance measures as markers of health. (ekstern lenke)
-
Lindsay K. Caesar; Joshua J. Kellogg; Olav Martin Kvalheim
et al. (2019). Opportunities and limitations for untargeted mass spectrometry metabolomics to identify biologically active constituents in complex natural product mixtures. (ekstern lenke)
-
Geir Kåre Resaland; Eivind Aadland; Vegard Fusche Moe
et al. (2016). Effects of physical activity on schoolchildren's academic performance: The Active Smarter Kids (ASK) cluster-randomized controlled trial. (ekstern lenke)
-
Ernestine Fanjara; Reidar Arneberg; Olav Martin Kvalheim
et al. (2025). A Colorimetric Approach for Detecting a Selected Fecal Cortisol Metabolite as a Stress Biomarker in Atlantic Salmon. (ekstern lenke)
-
Olav Martin Kvalheim
(2010). Interpretation of partial least squares regression models by means of target projection and selectivity ratio plots. (ekstern lenke)
-
Hailin Shen; Bjørn Grung; Olav Martin Kvalheim
et al. (2001). Automated curve resolution applied to data from multi-detection instruments. (ekstern lenke)
-
Tarja Rajalahti; Reidar Arneberg; Ann Cathrine Kroksveen
et al. (2009). Discriminating Variable Test and Selectivity Ratio Plot: Quantitative Tools for Interpretation and Variable (Biomarker) Selection in Complex Spectral or Chromatographic Profiles. (ekstern lenke)
-
Eivind Aadland; John Roger Andersen; Sigmund Alfred Anderssen
et al. (2013). Physical activity versus sedentary behavior: associations with lipoprotein particle subclass concentrations in healthy adults. (ekstern lenke)
-
R. G. Brereton; A. Rahmani; Yi-zeng Liang
et al. (1994). Investigation of the allomerization reaction of chlorophyll a: use of diode array HPLC, mass spectrometry and chemometric factor analysis for the detection of early products. (ekstern lenke)
-
F. O. Libnau; Olav Martin Kvalheim; A. A. Christy
(1994). Spectra of water in the near- and mid-infrared region. (ekstern lenke)
-
J. Toft; Olav Martin Kvalheim
(1994). Multi-array resolution parameter for multidetection chromatography. Performance of alternating regression, iterative target transformation factor analysis and heuristic evolving latent projections. (ekstern lenke)
-
Yi-zeng Liang; Rolf Manne; Olav Martin Kvalheim
(1994). Resolution of embedded chromatographic peaks by sequential rank analysis of the firs-order differentiated elution profile in the domiain. (ekstern lenke)
-
Olav Martin Kvalheim; F. Brakstad; Yi-zeng Liang
(1994). Preprocessing of analytical profiles in the presence of homoscedastic or heteroscedastic noise. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim
(1996). Methods for multivariate analysis. (ekstern lenke)
-
Egil Nodland; Fred Olav Libnau; Olav Martin Kvalheim
et al. (1996). Influence and correction of peak shift and band broadening observed by rank analysis on vibrational bands from variable-temperature measurement. (ekstern lenke)
-
Yizeng Liang; Dalin Yuan; Qingsong Xu
et al. (2008). Modeling based on subspace orthogonal projections for QSAR and QSPR research. (ekstern lenke)
-
Geir Rune Flåten; Bjørn Grung; Olav Martin Kvalheim
(2007). A comparison of different pre-treatment procedures for reducing heteroscedasticity and other irrelevant features in data prior to modelling of benthic count profiles. (ekstern lenke)
-
Tarja Rajalahti; Reidar Arneberg; Frode Berven
et al. (2009). Biomarker discovery in mass spectral profiles by means of selectivity ratio plot. (ekstern lenke)
-
Eivind Aadland; Olav Martin Kvalheim; Elisabeth Straume Haugland
et al. (2025). Investigating between-group effects of a physical activity intervention across the physical activity intensity spectrum using multivariate pattern analysis. (ekstern lenke)
-
Tarja Rajalahti; Eivind Aadland; Geir Kåre Resaland
et al. (2021). Influence of adiposity and physical activity on the cardiometabolic association pattern of lipoprotein subclasses to aerobic fitness in prepubertal children. (ekstern lenke)
-
Geir Kåre Resaland; Vegard Fusche Moe; Eivind Aadland
et al. (2015). Active Smarter Kids (ASK): Rationale and design of a cluster-randomized controlled trial investigating the effects of daily physical activity on children's academic performance and risk factors for non-communicable diseases. (ekstern lenke)
-
Laila Stordrange; Fred Olav Libnau; Dick Malthe-Sørensen
et al. (2002). Feasibility study of NIR for surveillance of a pharmaceutical process, including a study of different preprocessing techniques. (ekstern lenke)
-
M. D. Hämäläinen; Yi-zeng Liang; Olav Martin Kvalheim
et al. (1993). Deconvolution in one-dimensional chromomatography by heuristic evolving latent projections of whole profiles retention time shifted b y Simplex optimization of cross correlation between target peaks. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim
(1993). A two-way procedure for background correction of chromatographic/spectroscopic data by means of congruence analysis and least-squares fit of the zero-component regions, comparison with double-centering. (ekstern lenke)
-
Laila Stordrange; Alfred Anthony Christy; Olav Martin Kvalheim
et al. (2002). Study of the Self-Association of Alcohols by Near-Infrared Spectroscopy and Multivariate 2D Techniques. (ekstern lenke)
-
B. K. Alsberg; Olav Martin Kvalheim
(1993). Compression of n-order data arrays by B-splines. Part 1. Theory. (ekstern lenke)
-
Eivind Aadland; Lars Bo Andersen; Sigmund Alfred Anderssen
et al. (2019). Accelerometer epoch setting is decisive for associations between physical activity and metabolic health in children. (ekstern lenke)
-
Øystein Fluge; K. Gilje; Einar Sletten
et al. (1996). Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia. (ekstern lenke)
-
Alfred A. Christy; Yi-zeng Liang; Olav Martin Kvalheim
(1992). On-line pyrolysis of asphaltenes studied by Diffuse reflectance Fourier transform infrared spectroscopy. (ekstern lenke)
-
Eivind Aadland; Olav Martin Kvalheim; Sigmund Alfred Anderssen
et al. (2019). Multicollinear physical activity accelerometry data and associations to cardiometabolic health: Challenges, pitfalls, and potential solutions. (ekstern lenke)
-
Terje V. Karstang; Jostein Toft; Olav Martin Kvalheim
(1992). Estimation of prediction error for samples within the calibration range. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim; Rolf Manne
(1992). White, grey and black - A classification of methods for quantitative and qualitative analysis of multicomponent analytical systems. (ekstern lenke)
-
Bjørn K. Alsberg; Olav Martin Kvalheim
(1992). Compression of n-order data arrays by B-plines. Part. theory. (ekstern lenke)
-
B. K. Alsberg; Egil Nodland; Olav Martin Kvalheim
(1994). Compression of an order data arrays by B-splines. Part 2. Application to second- order FT-IR data. (ekstern lenke)
-
Eivind Aadland; Olav Martin Kvalheim; Sigmund Alfred Anderssen
et al. (2018). The multivariate physical activity signature associated with metabolic health in children. (ekstern lenke)
-
Geir Rune Flåten; Helge Botnen; Bjørn Grung
et al. (2004). Assigning environmental variables to observed biological changes. (ekstern lenke)
-
Tarja Anniki Rajalahti Kvalheim; Ann Cathrine Kroksveen; Reidar Arneberg
et al. (2010). A multivariate approach to reveal biomarker signatures for disease classification: application to mass spectral profiles of cerebrospinal fluid from patients with multiple sclerosis. (ekstern lenke)
-
Olav Martin Kvalheim; Tarja Rajalahti; Eivind Aadland
(2022). An approach to assess and adjust for the influence of multicollinear covariates on metabolomics association patterns-applied to a study of the associations between a comprehensive lipoprotein profile and the homeostatic model assessment of insulin resistance. (ekstern lenke)
-
Ingvar Eide; Gunhild Neverdal; Bodil Thorvaldsen
et al. (2001). Resolution of GC-MS Data of Complex PAC Mixtures and Regression Modeling of Mutagenicity by PLS. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim
(1993). Unique resolution of hidden peaks in multidetection chromatography by first-order differentiation and orthogonal projectio ns. (ekstern lenke)
-
Tim U. H. Baumeister; Eivind Aadland; Roger G. Linington
et al. (2024). Multivariate pattern analysis: a method and software to reveal, quantify, and visualize predictive association patterns in multicollinear data. (ekstern lenke)
-
A. A. Christy; Olav Martin Kvalheim
(1995). Particle size effect on diffuse reflectance spectra: Modification of Kubelka-Munk equation. (ekstern lenke)
-
A. A. Christy; A. L. Hopland; Tanja Barth
et al. (1989). Quantitative determination of thermal maturity in sedimentary organic matter by diffuse reflectance infrared spectroscopy of asphaltenes. (ekstern lenke)
-
J. Toft; Olav Martin Kvalheim
(1994). Nonlinear curve fitting of bilinear data by ortogonal projections for rank analysis. Applications to GC-IR and temperature IR studies. (ekstern lenke)
-
Bjørn Grung; Olav Martin Kvalheim
(1994). Rank determination of spectroscopi data by means of cross validation - The effect of replicated measurements on the degrees of fredom. (ekstern lenke)
-
Harald Førdedal; Bjørn Øivind Midttun; Johan Sjøblom
et al. (1996). A multivariate analysis of w/o emulsions in high external electric fields, as studied by means of dielectric time domain spectroscopy. Part II. Model emulsions stabilised by interfacially active fractions from crude oils. (ekstern lenke)
-
Yi-zeng Liang; M. D. Hämäläinen; Olav Martin Kvalheim
et al. (1994). Assessment of peak origin and purity by orthogonal design and Heuristic evolving latent projections. (ekstern lenke)
-
Eivind Aadland; Ada Kristine Ofrim Nilsen; Lars Bo Andersen
et al. (2020). A comparison of analytical approaches to investigate associations for accelerometry-derived physical activity spectra with health and developmental outcomes in children. (ekstern lenke)
-
Olav Martin Kvalheim; Reidar Arneberg; Olav L. Bleie
et al. (2014). Variable importance in latent variable regression models. (ekstern lenke)
-
Joshua J. Kellogg; Tyler N. Graf; Mary F. Paine
et al. (2017). Comparison of metabolomics approaches for evaluating the variability of complex botanical preparations: green tea (Camellia sinensis) as a case study. (ekstern lenke)
-
GR Flaten; Bjørn Grung; Olav Martin Kvalheim
(2004). A method for validation of reference sets in SIMCA modelling. (ekstern lenke)
-
Siv Meling; Olav Martin Kvalheim; Reidar Arneberg
et al. (2013). Investigation of serum protein profiles in scrapie infected sheep by means of SELDI-TOF-MS and multivariate data analysis. (ekstern lenke)
-
Jostein Toft; Olav Martin Kvalheim; Fred Olav Libnau
et al. (1994). Non-linear curvefitting of bilinear data using orthogonal projections for rank analysis. Applications to gas chromatography/ infrared spectrometry and variable temperature infrared studies. (ekstern lenke)
-
Ingvar Eide; Gunhild Neverdal; Bodil Thorvaldsen
et al. (2004). Toxicological evaluation of complex mixtures: fingerprinting and multivariate analysis. (ekstern lenke)
-
Olav Martin Kvalheim; Tarja Rajalahti
(2024). Omega-3 Marine Fatty Acid Supplementation to Healthy Subjects Interacts With Moderate Physical Activity to Provide a Cardiovascular Healthier Lipoprotein Subclass Profile. (ekstern lenke)
-
Eivind Aadland; Lars Bo Andersen; Jairo Hidalgo Migueles
et al. (2020). Interpretation of associations between the accelerometry physical activity spectrum and cardiometabolic health and locomotor skills in two cohorts of children using raw, log-transformed, or compositional data. (ekstern lenke)
-
Harald Kallevik; Olav Martin Kvalheim; Johan Sjöblom
(2000). Quantitative determination of asphaltenes and resins in solution by means of near-infrared spectroscopy. Correlations to emulsion stability. (ekstern lenke)
-
A. A. Christy; Olav Martin Kvalheim; F. O. Libnau
et al. (1993). Interpretation of chemical structural changes by target-projection analysis of infrared profiles. (ekstern lenke)
-
H. Idborg-Björkman; P.-O. Edlund; Olav Martin Kvalheim
et al. (2003). Screening of biomakers in rat urine using LC/MC electrospray ionization-MS and two-way data analysis. (ekstern lenke)
-
Reidar Arneberg; Tarja Rajalahti; Kristian Flikka
et al. (2007). Pretreatment of mass spectral profiles: Application to proteomic data. (ekstern lenke)
-
Olav Martin Kvalheim
(1992). Laboratory Profile. (ekstern lenke)
-
B. K. Alsberg; Olav Martin Kvalheim
(1994). Speed improvement of multivariate algorithms by the method of postponed basis matrix multiplication method. Part 1. Principal component analysis. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim
(1992). A two-way procedure for background correction of chromatographic/ spectroscopic data by means of congruence analysis and least-squares fit of the zerocomponent regions, comparison with double-centering. (ekstern lenke)
-
Eivind Aadland; Lars Bo Andersen; Geir Kåre Resaland
et al. (2019). Interpretation of multivariate association patterns between multicollinear physical activity accelerometry data and cardiometabolic health in children-a tutorial. (ekstern lenke)
-
Olav Martin Kvalheim; Warren S. Vidar; Tim U. H. Baumeister
et al. (2024). Implications of confounding from unmodeled interactions between explanatory variables when using latent variable regression models to make inferences. (ekstern lenke)
-
Geir Kåre Resaland; Tarja Rajalahti; Eivind Aadland
et al. (2018). Strong association between cardiorespiratory fitness and serum
lipoprotein subclass pattern in prepubertal healthy children. (ekstern lenke)
-
Tarja Rajalahti; Eivind Aadland; Geir Kåre Resaland
et al. (2021). Cardiometabolic associations between physical activity, adiposity, and lipoprotein subclasses in prepubertal norwegian children. (ekstern lenke)
-
Lindsay K. Caesar; Joshua J. Kellogg; Olav Martin Kvalheim
et al. (2018). Integration of Biochemometrics and Molecular Networking
to Identify Antimicrobials in Angelica keiskei. (ekstern lenke)
-
Olav Martin Kvalheim; Bjørn Grung; Tarja Rajalahti
(2019). Number of components and prediction error in partial least squares regression determined by Monte Carlo resampling strategies. (ekstern lenke)
-
Alfred A. Christy; Olav Martin Kvalheim
(1992). Applications of diffuse reflectance Fourier transform infrared spectroscopy in petroleum geochemistry. (ekstern lenke)
-
R. G. Brereton; A. Rahmani; Yi-zeng Liang
et al. (1992). Investigation of the allomerization reaction of chlorophylla: use of diode array HPLC, mass spectrometry and chemometrics factor analysis for the detection of early products. (ekstern lenke)
-
Øyvind Midttun; Olav Martin Kvalheim
(2001). Interactions in chromatographic separation of resins from deasphaltened crude oils studied by means of infrared spectroscopy and principal component analysis. (ekstern lenke)
-
GR Flaten; Bjørn Grung; Olav Martin Kvalheim
(2004). Quantification of pollution levels by multiway modelling. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim; A. Höskuldsson
(1993). Determination of detection limit and local chemical rank by designing a nonparametric test from the zero-component regions. (ekstern lenke)
-
Tanja Barth; M. Seim; A. A. Christy
et al. (1995). Maturity trends in asphaltenes from pyrolysed source rocks and natural coals-Multivariate modelling of diffuse reflectance Fourier transform infrared spectra. (ekstern lenke)
-
A. A. Christy; Olav Martin Kvalheim; Harald Høiland
(1994). Bulk compositional variations of coal asphaltenes studied by latent variable analysis of infrared microspectroscopic data. (ekstern lenke)
-
Chenchen Lin; John Roger Andersen; Villy Våge
et al. (2016). Intensive lifestyle intervention provides rapid reduction
of serum fatty acid levels in women with severe obesity
without lowering omega-3 to unhealthy levels. (ekstern lenke)
-
B. Massart; Fred Olav Libnau; Olav Martin Kvalheim
et al. (1996). Projective modelling by SIMCA - a new dynamic strategy for cost-efficient environmental monitoring around offshore installations. (ekstern lenke)
-
Øystein Fluge; K. Gilje; Einar Sletten
et al. (1996). Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia. (ekstern lenke)
-
F. O. Libnau; A. A. Christy; Olav Martin Kvalheim
(1994). Resolution of infrared spectra and kinetic analysis of mutarotation of D-Glucose in water by sequential rank analysis. (ekstern lenke)
-
Paul Remy Jones; Tarja Rajalahti; Geir Kåre Resaland
et al. (2021). Cross-sectional and prospective associations between aerobic fitness and lipoprotein particle profile in a cohort of Norwegian schoolchildren. (ekstern lenke)
-
Liangxiao Zhang; Svein Are Mjøs; Sonnich Meier
et al. (2010). The vector of calibration ratios: A simple transfer method for mass spectra. (ekstern lenke)
-
Joshua J. Kellogg; Daniel A. Todd; Joseph M. Egan
et al. (2016). Biochemometrics for Natural Products Research: Comparison of Data Analysis Approaches and Application to Identification of Bioactive Compounds. (ekstern lenke)
-
Chenchen Lin; Villy Våge; Svein Are Mjøs
et al. (2015). Changes in Serum Fatty Acid Levels During the First Year After Bariatric Surgery. (ekstern lenke)
-
A. A. Christy; Egil Nodland; Olav Martin Kvalheim
(1993). A gas cell for on-line transmission Fourier-transform infrared spectrometry. (ekstern lenke)
-
Olav Bleie; Michael F. Roberto; Thomas I. Dearing
et al. (2015). Moffat-swern oxidation of alcohols: Translating a batch reaction to a continuous-flow reaction. (ekstern lenke)
-
Hailin Shen; Y. Liang; Olav Martin Kvalheim
et al. (2000). Determination of chemical rank of two-way data from subspace comparisons. (ekstern lenke)
-
Øystein Fluge; K. Gilje; Einar Sletten
et al. (1996). Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia. (ekstern lenke)
-
Chenchen Lin; Tarja Rajalahti; Svein Are Mjøs
et al. (2016). Predictive associations between serum fatty acids and lipoproteins in healthy non-obese Norwegians: implications for cardiovascular health. (ekstern lenke)
-
Olav Martin Kvalheim; Yi-zeng Liang
(1992). Heuristic Evolving Latent Projection - resolving two-way multicomponent data. Part 1. Selectivity, latent-projective graph, datascope, local rank analysis and unique resolution. (ekstern lenke)
-
Eivind Aadland; Olav Martin Kvalheim; Sigmund Alfred Anderssen
et al. (2019). The triaxial physical activity signature associated with metabolic health in children. (ekstern lenke)
-
Jostein Toft; Olav Martin Kvalheim; Alfred A. Christy
et al. (1992). Analysis of nontransparent polymers-mixture design, 2nd derivative attenuated total internal reflectance FT-IR and multivariate calibration. (ekstern lenke)
-
Olav Martin Kvalheim
(1992). The latent variable. (ekstern lenke)
-
A. A. Christy; R. A. Velapoldi; Olav Martin Kvalheim
et al. (1987). Multivariate calibration of diffuse reflectance Fourier-transform infrared spectra of coals as an alternative to rank determination by vitrinite reflectance. (ekstern lenke)
-
Olav Martin Kvalheim; A. A. Christy; A. Bjørseth
et al. (1987). Maturity determination of organic matter in coals using the methyl phenanthrene distribution. (ekstern lenke)
-
B. K. Alsberg; Olav Martin Kvalheim
(1994). Speed improvement of multivariate algorithms by the method of postponed basis matrix multiplication method. Part II. Three-mode principal component analysis. (ekstern lenke)
-
Alfred A. Christy; Yi-zeng Liang; R. Velapoldi
et al. (1992). Effect of particle size on diffuse reflectance infrared spectra of polysterene spheres. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim; A. Ramani
et al. (1992). Resolution of strongly overlapping two-way multicomponent data by means of Heuristic Evolving Latent Projections. (ekstern lenke)
-
Paul Remy Jones; Tarja Rajalahti; Geir Kåre Resaland
et al. (2019). Associations of physical activity and sedentary time with lipoprotein subclasses in Norwegian schoolchildren: The Active Smarter Kids (ASK) study. (ekstern lenke)
-
Geir Martin Førland; Yi-zeng Liang; Olav Martin Kvalheim
et al. (1997). Associative bahaviour of benzyl alcohol in carbon tetrachloride solutions. (ekstern lenke)
-
Olav Martin Kvalheim
(2020). Variable importance: Comparison of selectivity ratio and
significance multivariate correlation for interpretation of
latent‐variable regression models. (ekstern lenke)
-
Olav Martin Kvalheim; Tarja Rajalahti; Reidar Arneberg
(2009). X-tended target projection (XTP) - comparison with orthogonal partial least squares (OPLS) and PLS post-processing by similarity transformation (PLS + ST). (ekstern lenke)
-
J. Toft; Olav Martin Kvalheim
(1993). Resolution parameter for multidetection chromatography. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim
(1993). Heuristic evolving latent projections: Resolving hyphenated chromatographic profiles by component stripping. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim; Rolf Manne
(1993). White, grey and black - A classification of methods for quantitative analysis of multicomponent analytical systems. (ekstern lenke)
-
Yi-zeng Liang; Olav Martin Kvalheim; A. Ramani
et al. (1993). Resolution of strongly overlapping two-way multicomponent data by means of Heuristic Evolving Latent Projections. (ekstern lenke)
-
A. A. Christy; Olav Martin Kvalheim; K. Øygard
et al. (1991). Maturity of Kerogen and asphaltenes determined by Partial-Least -Squares (PLS) calibration and target projection of diffuse reflectance Fourier-transformed infrared spectra. (ekstern lenke)
-
A. A. Christy; Olav Martin Kvalheim
(1992). Applications of diffuse reflectance Fourier-transform infrared spectroscopy in petroleum geochemistry. (ekstern lenke)
-
T. V. Karstang; A. A. Christy; Olav Martin Kvalheim
(1991). Diffuse reflectance Fourier-transformed infrared spectroscopy in petroleum exploration: A multivariate approach to maturity determination. (ekstern lenke)
-
A. A. Christy; Birger Dahl; Olav Martin Kvalheim
(1989). Structural features of resins, asphaltenes and kerogen studied by diffuse reflectance Fourier-transform infrared spectroscopy. (ekstern lenke)
-
J. Toft; Olav Martin Kvalheim; A. A. Christy
et al. (1992). Analysis of non transparent polymers: Mixture design, 2nd derivate attenuated total internal reflectance FT-IR and multivariate calibration. (ekstern lenke)
-
Harald Førdedal; Bjørn Øivind Midttun; Johan Sjøblom
et al. (1996). A multivariate analysis of w/o emulsions in high external electric fields, as studied by means of dielectric time domain spectroscopy. (ekstern lenke)
-
Geir Martin Førland; Fred Olav Libnau; Olav Martin Kvalheim
et al. (1996). Self-Association of Medium-Chain Alcohols in n-Decane Solutions. (ekstern lenke)
-
F. O. Libnau; J. Toft; A. A. Christy
et al. (1994). Structure of liquid water determined from infrared temperature profiling and evolutionary curve resolution. (ekstern lenke)
-
Egil Nodland; Fred Olav Libnau; Olav Martin Kvalheim
(1996). Resolution of infrared profiles from variable temperature experiments on mixtures and conformers in rapid equilibrum by compensating for thermal and solvent effects. (ekstern lenke)
-
Liangxiao Zhang; Wan Zhang; Dongsheng Cao
et al. (2011). Resolving co-eluting chromatographic patterns by means of dissimilarity analysis in iterative target transformation factor analysis. (ekstern lenke)
-
B. K. Alsberg; Olav Martin Kvalheim
(1994). Compression of three-mode data arrays by B-splines prior to three-mode principal component analysis (PCA). (ekstern lenke)
-
A. A. Christy; Egil Nodland; Olav Martin Kvalheim
(1994). Determination of kinetic parameters for the dehydration of calcium oxalate monohydrate by diffuse reflectance infrared FT-IR spectroscopy. (ekstern lenke)
-
Jairo H. Migueles; Eivind Aadland; Lars Bo Andersen
et al. (2021). GRANADA consensus on analytical approaches to assess associations with accelerometer-determined physical behaviours (physical activity, sedentary behaviour and sleep) in epidemiological studies. (ekstern lenke)
-
Olav Martin Kvalheim; Hoi-Yan Chan; Iris Benzie
et al. (2011). Chromatographic profiling and multivariate analysis for screening and quantifying the contributions from individual components to the bioactive signature in natural products. (ekstern lenke)
-
Eide Ingvar; Gunhild Neverdal; Bodil Thorvaldsen
et al. (2002). Toxicological evaluation of complex mixtures by pattern recognition: Correlating chemical fingerprints to mutagenicity. (ekstern lenke)
Leserbrev
Konferanseforedrag
Leksikonartikkel
Forelesning
Medieintervju
Konferanseabstrakt
Populærvitenskapelig artikkel
Vitenskapelig bokkapittel
Konferanseposter
Forskningsrapport
Fremhevet artikkel i media
Lederartikkel
Doktorgradsavhandling
Vitenskapelig litteraturgjennomgang
Tidsskriftomtale
Se en full oversikt over publikasjoner i Cristin