Olav Martin Kvalheim
Stilling
Emeritus
Tilhørighet
Publikasjoner
Doktorgradsavhandling
- Chenchen Lin; Olav Martin Kvalheim (2016). Multivariate analysis of human serum fatty acid profiles. (ekstern lenke)
- Baichuan Deng; Olav Martin Kvalheim (2015). Multivariate analysis and model population analysis in chemical modeling. (ekstern lenke)
- Olav Martin Kvalheim (1987). Methods for the interpretation of multivariate data : examples from petroleum geochemistry. (ekstern lenke)
Forelesning
- Olav Martin Kvalheim (2019). Multivariate pattern analysis - why and how to do it?. (ekstern lenke)
- Olav Martin Kvalheim (2019). Kan vi stole på resultater fra «liten N»?. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti (2018). Fjordomics - Persontilpasset forebygging (folkehelse) og behandling vha utvidede blodanalyser. (ekstern lenke)
- Tarja Rajalahti; Olav Martin Kvalheim (2017). What can we use the new NMR platform for?. (ekstern lenke)
- Olav Martin Kvalheim (2017). Latent variables - How to find the information in multivariate data. (ekstern lenke)
- Olav Martin Kvalheim (2016). Eksempler på data-analyse i metabolomikk-prosjekter med fokus på lipidmetabolismen. (ekstern lenke)
- Olav Martin Kvalheim (2016). Analytisk strategier for persontilpasset medisin og helseovervåkning. (ekstern lenke)
- Olav Martin Kvalheim (2016). Hvilke faktorer påvirker lipidmetabolismen og hvordan kan vi bruke kunnskapen om dette?. (ekstern lenke)
- Olav Martin Kvalheim (2015). Frisk med fisk - men hvilken?. (ekstern lenke)
- Olav Martin Kvalheim (2015). Frisk med fisk - nye bevis. (ekstern lenke)
- Olav Martin Kvalheim (1997). Multivariate analysis of chemical data. (ekstern lenke)
- Olav Martin Kvalheim (1997). Multivariate metoder i prosessutvikling (10 dager). (ekstern lenke)
- Olav Martin Kvalheim (1997). Chemometrics in Bergen. (ekstern lenke)
- Olav Martin Kvalheim (1996). The third wave: Convergence of chemometrics, information and quality into an inductive approach for complex real-world problems. (ekstern lenke)
- Olav Martin Kvalheim (1996). Analysis of evolving systems - applications to multicomponent profiles from diode array detection and infrared analysis. (ekstern lenke)
- Olav Martin Kvalheim (1996). The third wave: Convergence of chemometrics, information and quality into an inductive approach for complex real-world problems. (ekstern lenke)
- Olav Martin Kvalheim (1996). Multicomponent analysis of dynamic systems. (ekstern lenke)
- Olav Martin Kvalheim (1996). Analysis of evolving systems - applications to multicomponent profiles from diode array detection and infrared analysis. (ekstern lenke)
- A. A. Christy; O. Å. Skogheim; F. O. Libnau et al. (1995). Resolution of infrared spectra of unstable species in liquid solutions. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1994). Considerations for quantitative analysis in reflectance spectroscopy Plenary lecture. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; R. A. Velapoldi (1994). Modification of Kubelka Munk function for quantitative analysis in diffuse reflectance spectrometry. (ekstern lenke)
- F. O. Libnau; A. A. Christy; Olav Martin Kvalheim (1994). Kinetic analysis of Mutarotation of _a-Glucose in water. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; R. A. Velapoldi (1994). Quantitative analysis in diffuse reflectance spectrometry: Modification of Kubelka-Munk equation. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1993). Structural differences in asphaltenes analysed by target projection analysis SSC3. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1993). Structure and dehydration of calcium oxalate monohydrate. (ekstern lenke)
- A. A. Christy; E. Nordland; A. Burnham et al. (1993). Determination of kinetic parameters for the dehydration of calcium oxalate monohydrate by On-Line pyrolysis diffuse reflectance infrared spectrometry. (ekstern lenke)
- A. A. Christy; Yi-zeng Liang; Olav Martin Kvalheim (1992). Determination of activation energy for the thermal decomposition of kerogen by online pyrolysis infrared spectroscopy. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1992). Applications of chemometrics in infrared microspectrometry (invited plenary lecture). (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; Birger Dahl (1992). Determination of the kinetic parameters for the decomposition of kerogen samples using On-Line pyrolysis diffuse reflectance Fourier-transform infrared spectrometry. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1992). Multivariate analysis of infrared spectroscopic data: Application to the chemical transformation of sedimentary organic matter (invited plenary lecture). (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; Birger Dahl et al. (1990). Identification of maturity factors by Partial-Least-Square target rotation of diffuse reflectance infrared spectroscopic profiles aquired on extracts of coals and sediments. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; T. V. Karstang (1990). Interpretation of diffuse reflectance infrared spectroscopic profiles obtained by multivariate target projection. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; T. V. Karstang (1990). Multivariate calibration in petroleum geochemistry. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; Birger Dahl (1989). Structural features of resins, asphaltenes and kerogens studied by diffuse reflectance infrared spectroscopy. (ekstern lenke)
- T. V. Karstang; A. A. Christy; Olav Martin Kvalheim (1989). Diffuse reflectance Fourier-transform infrared spectroscopy and multivariate data analysis in petroleum exploration: New parameters for basin modelling. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; T. V. Karstang et al. (1986). Multivariate analysis of diffuse reflectance spectra of coals. (ekstern lenke)
Forskningsrapport
- Olav Martin Kvalheim; K.I. Ugland (1997). Virkninger av kjemikalieutslipp fra petroleumsvirksomhet i Skagerak. Konsekvensutredning for OED. (ekstern lenke)
- F. O. Libnau; A. A. Christy; Olav Martin Kvalheim (1995). Grunn-hydrofilisering av QX-6, Prins-reaksjon. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1994). Determination of kinetic parameters of kerogen samples by on-line diffuse reflectance FT-IR spectroscopy. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1990). Comparison of infrared spectra of petroleum fractions oil fractions. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1989). Characterization of crude oils by multivariate data analysis of diffuse reflectance infrared spectra of asphaltenes. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1987). Multivariate calibration of diffuse reflectance spectra of coke samples against volatile organic matter. (ekstern lenke)
Fremhevet artikkel i media
- Olav Martin Kvalheim; Bjørn Noren (2023). Nasjonal strategi for tidlig diagnose av prostatakreft. (ekstern lenke)
- Olav Martin Kvalheim (1996). Chemometrics, quality, information and "The Third Wawe". (ekstern lenke)
- Olav Martin Kvalheim (1994). Kjemometri - En strategi for total optimalisering av produktkvalitet og industrielle prosesser. (ekstern lenke)
- Olav Martin Kvalheim (1993). Chemometrics: academic and industrial perspectives. (Editorial). (ekstern lenke)
Konferanseabstrakt
- Eivind Aadland; Olav Martin Kvalheim; Sigmund Alfred Anderssen et al. (2018). The multivariate physical activity signature associated with metabolic health in children. (ekstern lenke)
- Eivind Aadland; Lars Bo Andersen; Sigmund Alfred Anderssen et al. (2018). Associations for volumes and patterns of physical activity with metabolic health in children: a multivariate pattern analysis approach. (ekstern lenke)
- Paul Remy Jones; Olav Martin Kvalheim; Geir Kåre Resaland et al. (2018). Lipoprotein subclasses and their associations with physical activity and sedentary time in Norwegian schoolchildren: The Active Smarter Kids study. (ekstern lenke)
- Geir Kåre Resaland; Tarja Rajalahti; Eivind Aadland et al. (2017). Strong association between cardiorespiratory fitness and serum lipoprotein subclass pattern in prepubertal healthy children. (ekstern lenke)
- Emily R. Britton; Joshua J. Kellogg; Olav Martin Kvalheim et al. (2016). New strategies to identify synergists from Hydrastis canadensis (goldenseal). (ekstern lenke)
- Joshua J. Kellogg; Olav Martin Kvalheim; Nadja B. Cech (2016). Biochemometric analysis reveals complimentary bacterial inhibitory functionalities of the medicinal lichen Usnea barbata. (ekstern lenke)
- Tarja Rajalahti; Eivind Aadland; John Roger Andersen et al. (2014). A multivariate approach to reveal biomarker signatures in instrumental profiles of body fluids. (ekstern lenke)
- Chenchen Lin; Svein Are Mjøs; Villy Våge et al. (2014). Effect of two types of bariatric surgery on the fatty acid profile in serum. (ekstern lenke)
- Randi Jepsen; John Roger Andersen; Eivind Aadland et al. (2011). Health Related Quality of Life in in-patients undergoing lifestyle treatment for morbid obesity. (ekstern lenke)
- Tarja Rajalahti; Reidar Arneberg; Frode Berven et al. (2008). Biomarker discovery from mass spectral profiles: A combined proteomics and multivariate analysis. (ekstern lenke)
- Olav Martin Kvalheim; Reidar Arneberg; Brian Marquardt (2008). PAT - Optimal prediction of properties by means of tailormade modelling of spectroscopic/chromatographic profiles. (ekstern lenke)
- Tarja Rajalahti; Reidar Arneberg; Frode Berven et al. (2008). Early diagnosis and biomarker discovery from mass spectral profiles: application to multiple sclerosis. (ekstern lenke)
Konferanseforedrag
- Ernestine Fanjara; Reidar Arneberg; Olav Martin Kvalheim et al. (2025). En kolorimetrisk tilnærming for påvisning av en utvalgt kortisolmetabolitt i avføring som en stressbiomarkør hos atlantisk laks. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti (2024). Can chemometrics and metabolomics provide information about a healthy lifestyle?. (ekstern lenke)
- Olav Martin Kvalheim; Reidar Arneberg; Bjørn Grung et al. (2023). Monitoring and adjusting a batch process using online Raman sensors and multivariate modelling. (ekstern lenke)
- Warren S. Vidar; Tim U.H. Baumeister; Lindsay K. Caesar et al. (2023). Unlocking New Opportunities for Natural Product Discovery with Interaction Metabolomics. (ekstern lenke)
- Olav Martin Kvalheim; Warren S. Vidar; Tim U.H. Baumeister et al. (2023). Confounding in model interpretation when using latent variable regression methods to make inferences. (ekstern lenke)
- Olav Martin Kvalheim (2021). Characterization of crude oil and crude oil emulsions by NIR spectroscopy and multivariate analysis. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti (2021). A novel approach to handle confounders in multicollinear data - applied to study the relation of a measure of insulin resistance (the HOMA score) to lipoprotein subclass patterns in serum from prepubertal children. (ekstern lenke)
- Olav Martin Kvalheim (2021). Revealing the information (bioactivity) in multicollinear profiles from natural product extracts. (ekstern lenke)
- Olav Martin Kvalheim; Bjørn Grung; Tarja Rajalahti (2019). Optimal partial least squares models and predictions of properties using Monte Carlo resampling strategies. (ekstern lenke)
- Olav Martin Kvalheim (2019). What is the best measure(s) of variable importance for interpretation and variable selection in multivariate regression models?. (ekstern lenke)
- Olav Martin Kvalheim; Bjørn Grung; Tarja Rajalahti (2019). Optimal Partial Least Squares models and predictions of properties using Monte Carlo resampling strategies. (ekstern lenke)
- Olav Martin Kvalheim; Joshua J. Kellogg; Lindsay K. Caesar et al. (2019). Using chromatography and chemometrics for detecting bioactive components in very complex extracts of natural products. (ekstern lenke)
- Olav Martin Kvalheim; Reidar Arneberg; Bjørn Grung et al. (2018). Development and maintenance of process models - automating the selection and updating of models. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti (2018). Bruk av kjemometri til persontilpasset forebygging av livsstilssykdommer. (ekstern lenke)
- Olav Martin Kvalheim; Bjørn Grung (2017). Variable selection in process modeling. (ekstern lenke)
- Olav Martin Kvalheim (2017). Selecting the “right” variables in latent variable regression (LVR) modelling in the presence of multicolinearity and orthogonal variation - optimal interpretation and prediction at the same time. (ekstern lenke)
- Olav Martin Kvalheim (2017). Revealing the bioactive signature in multicomponent profiles. (ekstern lenke)
- Olav Martin Kvalheim; Reidar Arneberg; Tarja Rajalahti (2017). Monte Carlo Cross validation for component selection and determination of prediction error in latent-variable regression. (ekstern lenke)
- Olav Martin Kvalheim; Reidar Arneberg; Bjørn Grung et al. (2017). Determination of optimum number of components in partial least squares regression. (ekstern lenke)
- Olav Martin Kvalheim (2016). Analysis of metabolomics data – examples from the study of the lipid metabolism. (ekstern lenke)
- Olav Martin Kvalheim (2016). Which factors impact the lipid metabolism and how?. (ekstern lenke)
- J. Kellogg; D. A. Todd; J. M. Egan et al. (2015). Chemometric-directed bioexploration of natural products. (ekstern lenke)
- Olav Martin Kvalheim (2015). Predictive and orthogonal variation in latent variable regression and implications for the concept of model quality and model reduction. (ekstern lenke)
- Olav Martin Kvalheim (2014). Variable importance and variable selection in spectral profiles from process analysers. (ekstern lenke)
- Olav Martin Kvalheim (2014). Optimal strategies and tools for interpretation and variable selection in spectral profiles from process analysers. (ekstern lenke)
- Olav Martin Kvalheim (2014). Optimal strategies and tools for interpretation and variable selection in spectral profiles from process analysers. (ekstern lenke)
- Olav Martin Kvalheim (2014). Predictive and orthogonal variation in latent variable regression – model quality and model reduction. (ekstern lenke)
- Olav Martin Kvalheim (2014). Model performance, interpretation, prediction performance and SOLV-DPM for process control. (ekstern lenke)
- Eivind Aadland; John Roger Andersen; Olav Martin Kvalheim et al. (2013). Relationship between physical activity and lipoprotein subclass changes in severely obese women. (ekstern lenke)
- Tarja Rajalahti; Reidar Arneberg; Kristian Flikka et al. (2007). Preteatment of Mass Spectral Profiles: Application to proteomic data. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti; Reidar Arneberg et al. (2007). Analysis of Proteomic Profiles. (ekstern lenke)
- Olav Martin Kvalheim (2007). Analysis of Proteomic Profiles: Pretreatment and Biomarker Discovery for early diagnosis of diseases. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti; Reidar Arneberg et al. (2007). Target projection and proper data pre-treatment for the analysis of proteomic profiles. (ekstern lenke)
- Olav Martin Kvalheim (2007). Analysis of Proteomic Profiles - Biomarker Discovery and Early Diagnosis. (ekstern lenke)
- Olav Martin Kvalheim (2003). Introduction to design, Design of Experiments. (ekstern lenke)
- Olav Martin Kvalheim (2003). Medical application of GC- and LC- MS and MS resolver. (ekstern lenke)
- Olav Martin Kvalheim (2003). Resolution of GC-MS and LC-MS profiles of very complex biomedical samples. (ekstern lenke)
- Olav Martin Kvalheim (2003). Introduction of NOx-handling (pre & post, existing context, R&D, where are we today?) Handling of NOx in exhaust gases. (ekstern lenke)
- Olav Martin Kvalheim (2001). Identification of and solution to the problem of lurking variables in industrial processes. (ekstern lenke)
- Olav Martin Kvalheim (1997). PVA and related methods applied to improvement of industrial processes and product quality. (ekstern lenke)
- Olav Martin Kvalheim (1997). Kjemometri og kvalitet processes and product quality. (ekstern lenke)
- Olav Martin Kvalheim (1997). Chemometrics - advanced methods. (ekstern lenke)
- Olav Martin Kvalheim (1997). Detection and resolution of overlapping peaks in multidetection chromatography. (ekstern lenke)
- Olav Martin Kvalheim (1997). Environmental monitoring and forecasting by means of multivariate methods. (ekstern lenke)
- Olav Martin Kvalheim (1997). 2-D multicomponent analysis by means of Extricator. (ekstern lenke)
- Olav Martin Kvalheim (1997). En innføring i multikomponentanalyse. (ekstern lenke)
- Olav Martin Kvalheim (1997). Multivariate information extraction as a strategic and communication tool in the industrial enterprise. (ekstern lenke)
- Harald Høiland; Geir Martin Førland; Olav Martin Kvalheim et al. (1997). The associative behaviour of benzyl alcohol in carbon tetrachloride solutions. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1993). Particle size problem in diffuse reflectance spectrometry. (ekstern lenke)
- O. Libnau; A. A. Christy; G. Aksnes et al. (1993). Temperature dependency of the infrared spectra of water studied by Fourier-transform infrared spectroscopy. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1993). Particle size problem in diffuse reflectance Fourier-transform infrared spectrometry. Plenary lecture. (ekstern lenke)
- Alfred A. Christy; Yi-zeng Liang; Olav Martin Kvalheim (1992). Determination of activation energy for the thermal decomposition of kerogen by on-line pyrolysis infrared spectroscopy. (ekstern lenke)
- Alfred A. Christy; Olav Martin Kvalheim (1992). Applications of chemometrics in infrared microspectroscopy. (ekstern lenke)
- Alfred A. Christy; Olav Martin Kvalheim (1992). Multivariate analysis of infrared spectroscopic data: Application to the chemical transformation of sedimentary organic matter. (ekstern lenke)
Konferanseposter
- Olav Martin Kvalheim; Villy Våge; John Roger Andersen et al. (2016). Impact of bariatric surgery and intensive lifestyle intervention on serum omega-3 profiles. (ekstern lenke)
- J. Kellogg; D. A. Todd; J. M. Egan et al. (2015). Chemometric-directed bioexploration of natural products. (ekstern lenke)
- Chenchen Lin; Tarja Rajalahti; Svein Are Mjøs et al. (2015). Cardiovascular health revealed as correlation patterns and predictive relationships between serum lipoprotein and fatty acid features in non-obese Norwegian adults. (ekstern lenke)
- Randi Jepsen; John Roger Andersen; Eivind Aadland et al. (2011). Health Related Quality of Life in in-patients undergoing lifestyle treatment for morbid obesity. (ekstern lenke)
- Laila Stordrange; Fred Olav Libnau; Dick Malthe-Sørensen et al. (2001). Performance of multivariate calibration methods for determination of the active ingredient and impurity in a pharmaceutical process solution analysed by near infrared spectroscopy. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1994). Resolving OH stretching vibrations of the water of crystallization of calcium oxalate monohydrate by evolutionary factor analysis of infrared spectroscopic profiles. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1990). Structural changes during on-line pyrolysis of kerogen and asphaltenes as monitored by using diffuse reflectance infrared spectroscopy. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; T. V. Karstang (1988). Multivariate calibration of diffuse reflectance spectra of asphaltenes for thermal maturity. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; R. A. Velapoldi (1988). The determination of geologic maturation process using diffuse reflectance infrared Fourier-transform spectroscopy. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim; N. Telnæs (1987). Applications of diffuse reflectance infrared spectroscopy to petroleum geochemistry: Thermal maturity. (Received first prize as the best poster presentation). (ekstern lenke)
Lederartikkel
Leksikonartikkel
Leserbrev
- Olav Martin Kvalheim (2021). Politikerbestemt strømkrise kommer ikke til å gå over. (ekstern lenke)
- Olav Martin Kvalheim; Røgnvaldur Hannesson (2020). Fremdeles ingen kunder til CO2-fangst og lagring. (ekstern lenke)
- Olav Martin Kvalheim; Røgnvaldur Hannesson (2020). Hvor er kundene for CO2-fangst og hydrogen?. (ekstern lenke)
- Olav Martin Kvalheim (2020). «Koronaviruset gjør ting klimaaktivistene lenge har ønsket seg». (ekstern lenke)
- Olav Martin Kvalheim (2015). Et miljøvennlig og samfunnsnyttig prosjekt. (ekstern lenke)
- Olav Martin Kvalheim (2015). Folkeavstemningen om Engebø. (ekstern lenke)
- Olav Martin Kvalheim (2015). Kan ikkje vere kjøpt og betalt. (ekstern lenke)
- Olav Martin Kvalheim (2007). CO2-lobbyen styrer forskningen. (ekstern lenke)
- Olav Martin Kvalheim (2007). Proppfull av CO2 ?. (ekstern lenke)
Medieintervju
- Marius Valle; Olav Martin Kvalheim; Jarl Underhaug (2017). NMR-spektroskopi - Disse maskinene har potensial til å revolusjonere helsen din. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti; Sigrid Skjerdal et al. (2017). Har fått 13 millionar til nytt forskningsprosjekt. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti; Jon Bolstad et al. (2017). Forskning i tetskjiktet. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti; Jon Bolstad et al. (2017). Vestlandsblod under lupen. (ekstern lenke)
- Olav Martin Kvalheim; Geir Bjarte Hjetland (2016). Det beste er jo å ikkje få kreft. (ekstern lenke)
- Olav Martin Kvalheim; Håvard Heggen (2016). Trening og mat har større effekt for overvektige. (ekstern lenke)
- Frode Grimelid; Olav Martin Kvalheim (2015). Heller betre laks enn meir laks. (ekstern lenke)
- Frode Grimelid; Olav Martin Kvalheim; Willy Nerdal (2015). Meir og meir usunt omega-3 i laksen. (ekstern lenke)
- Olav Martin Kvalheim; Willy Nerdal (2015). Jo, økt innhold av plante-omega-3 gjør oppdrettslaksen mindre sunn enn tidligere. (ekstern lenke)
- Frode Grimelid; Olav Martin Kvalheim; Willy Nerdal (2015). Meir usunt omega-3 i laksen. (ekstern lenke)
- Tor Gunnar Tollaksen; Olav Martin Kvalheim (2015). Folk føres bak klimalyset. (ekstern lenke)
- Helge Johnsen; Olav Martin Kvalheim; Tarja Rajalahti (2015). Knekkjer trankoden. (ekstern lenke)
- Willy Nerdal; Olav Martin Kvalheim; Arne Hauge (2015). Fikk feit idé i Mikkeli. (ekstern lenke)
Populærvitenskapelig artikkel
- Olav Martin Kvalheim (2024). En strategi for å finne synergier mellom kjemiske forbindelser i biologisk aktive blandinger. (ekstern lenke)
- Olav Martin Kvalheim; Tarja Rajalahti (2024). Interaksjon mellom marine omega-3 fettsyrer og fysisk aktivitet forebygger hjerte/kar-uhelse. (ekstern lenke)
- Olav Martin Kvalheim; Reidar Arneberg; Marita Buarø et al. (2023). Konsentrasjon- og temperatur optimalisering av destillasjonsprosesser ved hjelp av optiske sensorer og flervariabel modellering. (ekstern lenke)
- Olav Martin Kvalheim (1997). Ny prosessutvikling. (ekstern lenke)
- Olav Martin Kvalheim (1997). Chemometrics at the University of Bergen. (ekstern lenke)
- Olav Martin Kvalheim (1996). Kan kjemometrien hjelpe Norge til å bli "Europas Japan"?. (ekstern lenke)
- Olav Martin Kvalheim (1996). Kjemometri - en metodikk for generering og analyse av data. (ekstern lenke)
- Olav Martin Kvalheim (1992). Universitets-industri samarbeid - går det an?. (ekstern lenke)
- Olav Martin Kvalheim (1992). Kjemometri og kvalimetri - Pilotprosjekt i COMETT-regi. (ekstern lenke)
Tidsskriftomtale
Vitenskapelig artikkel
- Eivind Aadland; Olav Martin Kvalheim (2025). Are associations between physical activity and lipoproteins in children moderated by fitness and fatness?. (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)
- 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)
- 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; 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)
- 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)
- 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)
- 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)
- 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)
- Warren S. Vidar; Tim U. H. Baumeister; Lindsay K. Caesar et al. (2022). Interaction Metabolomics to Discover Synergists in Natural Product Mixtures. (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)
- 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)
- 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)
- 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)
- Cecilie Sævdal Dybsland; Trine Bekkby; Kjersti Hasle Enerstvedt et al. (2021). Variation in Phenolic Chemistry in Zostera marina Seagrass Along Environmental Gradients. (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)
- 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)
- Olav Martin Kvalheim (2020). Variable importance: Comparison of selectivity ratio and significance multivariate correlation for interpretation of latent‐variable regression models. (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)
- 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)
- Joshua J. Kellogg; Olav Martin Kvalheim; Nadja B. Cech (2020). Composite score analysis for unsupervised comparison and network visualization of metabolomics data. (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)
- 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)
- Eivind Aadland; Olav Martin Kvalheim; Sigmund Alfred Anderssen et al. (2019). The triaxial physical activity signature associated with metabolic health in children. (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)
- 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; Bjørn Grung; Tarja Rajalahti (2019). Number of components and prediction error in partial least squares regression determined by Monte Carlo resampling strategies. (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)
- 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)
- Eivind Aadland; Olav Martin Kvalheim; Sigmund Alfred Anderssen et al. (2018). The multivariate physical activity signature associated with metabolic health in children. (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)
- 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 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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; 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)
- 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)
- 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)
- 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)
- Olav Martin Kvalheim; Reidar Arneberg; Olav L. Bleie et al. (2014). Variable importance in latent variable regression models. (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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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 (2010). Interpretation of partial least squares regression models by means of target projection and selectivity ratio plots. (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)
- Foo-Tim Chau; Hoi-Yan Chan; Chui-Yee Cheung et al. (2009). Recipe for Uncovering the Bioactive Components in Herbal Medicine. (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)
- 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)
- Tarja Rajalahti; Reidar Arneberg; Frode Berven et al. (2009). Biomarker discovery in mass spectral profiles by means of selectivity ratio plot. (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)
- Yizeng Liang; Dalin Yuan; Qingsong Xu et al. (2008). Modeling based on subspace orthogonal projections for QSAR and QSPR research. (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)
- 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)
- Reidar Arneberg; Tarja Rajalahti; Kristian Flikka et al. (2007). Pretreatment of mass spectral profiles: Application to proteomic data. (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)
- Geir Rune Flåten; Bjørn Grung; Olav Martin Kvalheim (2004). Quantification of pollution levels by multiway modelling. (ekstern lenke)
- Geir Rune Flåten; Helge Botnen; Bjørn Grung et al. (2004). Assigning environmental variables to observed biological changes. (ekstern lenke)
- Geir Rune Flåten; Bjørn Grung; Olav Martin Kvalheim (2004). A method for validation of reference sets in SIMCA modelling. (ekstern lenke)
- GR Flaten; Bjørn Grung; Olav Martin Kvalheim (2004). Quantification of pollution levels by multiway modelling. (ekstern lenke)
- GR Flaten; Bjørn Grung; Olav Martin Kvalheim (2004). A method for validation of reference sets in SIMCA modelling. (ekstern lenke)
- Ingvar Eide; Gunhild Neverdal; Bodil Thorvaldsen et al. (2004). Toxicological evaluation of complex mixtures: fingerprinting and multivariate analysis. (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)
- 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)
- 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)
- Eide Ingvar; Gunhild Neverdal; Bodil Thorvaldsen et al. (2002). Toxicological evaluation of complex mixtures by pattern recognition: Correlating chemical fingerprints to mutagenicity. (ekstern lenke)
- Hailin Shen; Bjørn Grung; Olav Martin Kvalheim et al. (2001). Automated curve resolution applied to data from multi-detection instruments. (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)
- 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)
- 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)
- 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)
- Hailin Shen; Y. Liang; Olav Martin Kvalheim et al. (2000). Determination of chemical rank of two-way data from subspace comparisons. (ekstern lenke)
- Hailin Shen; Laila Storedrange; Rolf Manne et al. (2000). Morphological score and its application to chemical rank determination. (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)
- Geir Martin Førland; Yi-Zeng Liang; Olav Martin Kvalheim et al. (1997). Associative Behavior of Benzyl Alcohol in Carbon Tetrachloride Solutions. (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)
- B.G. Sæten; Johan Sjöblom; J. Toft et al. (1997). Complexation between benzoic acid and fatty amines. An adsorption and chemometric study. (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)
- Øystein Fluge; K. Gilje; Einar Sletten et al. (1996). Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia. (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)
- 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)
- 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)
- 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)
- Øystein Fluge; K. Gilje; Einar Sletten et al. (1996). Proton nuclear magnetic resonance spectroscopy of serum from patients with colorectal neoplasia. (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; 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)
- A. A. Christy; Olav Martin Kvalheim (1995). Particle size effect on diffuse reflectance spectra: Modification of Kubelka-Munk equation. (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)
- 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)
- 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)
- 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)
- 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)
- 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. 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- Yi-zeng Liang; Olav Martin Kvalheim (1994). Diagnosis and resolution of multiwavelength chromatograms by rank map, orthogonal projections and sequential rank analysis. (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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- B. K. Alsberg; Olav Martin Kvalheim (1993). Compression of n-order data arrays by B-splines. Part 1. Theory. (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)
- 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)
- A. A. Christy; Egil Nodland; Olav Martin Kvalheim (1993). A gas cell for on-line transmission Fourier-transform infrared spectrometry. (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; A. Höskuldsson (1993). Determination of detection limit and local chemical rank by designing a nonparametric test from the zero-component regions. (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)
- 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)
- 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)
- Olav Martin Kvalheim (1992). Laboratory Profile. (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)
- 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)
- Terje V. Karstang; Jostein Toft; Olav Martin Kvalheim (1992). Estimation of prediction error for samples within the calibration range. (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)
- 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; Rolf Manne (1992). White, grey and black - A classification of methods for quantitative and qualitative analysis of multicomponent analytical systems. (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)
- 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)
- 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)
- Bjørn K. Alsberg; Olav Martin Kvalheim (1992). Compression of n-order data arrays by B-plines. Part. theory. (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)
- 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)
- 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)
- 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)
- A. A. Christy; Olav Martin Kvalheim (1992). Applications of diffuse reflectance Fourier-transform infrared spectroscopy in petroleum geochemistry. (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)
- 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)
- 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; Yi-zeng Liang; Olav Martin Kvalheim (1991). On-Line pyrolysis of asphaltenes studied by Diffuse reflectance Fourier-transform infrared spectroscopy. (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)
- 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)
- 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)
- 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)
- N. Telnæs; A. Bjørseth; A. A. Christy et al. (1987). Interpretation of multivariate data: Relationship between phenanthrenes in crude oils. (ekstern lenke)
Vitenskapelig bokkapittel
- Fred Olav Libnau; Alfred Antony Christy; Olav Martin Kvalheim (1996). Infrarød spektroskopi og kjemisk analyse. (ekstern lenke)
- Olav Martin Kvalheim (1996). Kvalitet, organisasjon og psykososialt arbeidsmiljø. (ekstern lenke)
- Trond Brekke; Olav Martin Kvalheim (1996). Analysis of nuclear magnetic resonance spectra of mixtures using multivariate techniques. (ekstern lenke)
- Olav Martin Kvalheim (1996). Taksonomi og kvantifisering av blandinger. (ekstern lenke)
- Olav Martin Kvalheim; F. Brakstad (1996). Kartlegging av komplekse industriprosesser for total prosesskvalitet. (ekstern lenke)
- Fred Olav Libnau; A.A. Christy; Olav Martin Kvalheim (1996). Surface layer and multilayer laminate analysis by chemometrics and and infrared spectroscopy. (ekstern lenke)
- Olav Martin Kvalheim (1996). Fra data til informasjon. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1995). Analytical profiles and Multivariate modelling in Geochemistry. (ekstern lenke)
- A. A. Christy; Olav Martin Kvalheim (1993). Analytical profiles and Multivariate modelling in Geochemistry. (ekstern lenke)
- Olav Martin Kvalheim; Terje V. Karstang (1992). SIMCA - classification by means of cross validated disjoint principal component models. (ekstern lenke)
- S. Kruse; Olav Martin Kvalheim; Marit Farstad et al. (1992). Effect of sample storage on spectra of serum - multivariate data analysis of protein NMR spectra. (ekstern lenke)