Helle Sørensen

Helle Sørensen

Professor

ORCID: 0000-0001-5273-6093

Publication year:
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  1. 2000

  2. Inference for Diffusion Processes and Stochastic Volatility Models

    Sørensen, Helle, 2000, Copenhagen: H.C.Ø.-Tryk. 164 p.

    Research output: Book/Report › Ph.D. thesis › Research

  3. 2001

  4. Discretely Observed Diffusions: Approximation of the Continuous-time Score Function

    Sørensen, Helle, 2001, In: Scandinavian Journal of Statistics. 28, 1, p. 113-121 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. 2002

  6. Estimation of diffusion parameters for discretely observed diffusion processes

    Sørensen, Helle, 2002, In: Bernoulli. 8, 4, p. 491-508 18 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  7. 2003
  8. Published

    Simulated likelihood approximations for stochastic volatility models

    Sørensen, Helle, 2003, In: Scandinavian Journal of Statistics. 30, 2, p. 257-276 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. 2004
  10. Published

    Mixtures of toxicants

    Cedergreen, Nina, Skovgaard, I. M., Streibig, Jens Carl & Sørensen, Helle, 2004, Symposium i anvendt statistik: 26. årgang, 2004. red. Anders Holm ed. Museum Tusculanum, Vol. 26. p. 210-219 10 p.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

  11. Published

    Parametric inference for diffusion processes observed at discrete points in time: a survey

    Sørensen, Helle, 2004, In: International Statistical Review. 72, 3, p. 337-354 18 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. 2007
  13. Published

    A note on R: linear models and models with random effects

    Martinussen, Torben, Skovgaard, I. M. & Sørensen, Helle, 2007, Frederiksberg: Department of Natural Sciences, University of Copenhagen. 60 p.

    Research output: Book/Report › Compendium/lecture notes › Education

  14. Published

    An isobole-based statistical model and test for synergism/antagonism in binary mixture toxicity experiments

    Sørensen, Helle, Cedergreen, Nina, Skovgaard, I. M. & Streibig, Jens Carl, 2007, In: Environmental and Ecological Statistics. 14, 4, p. 383-397 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    Is mixture toxicity measured on a biomarker indicative of what happens on a population level? a study with Lemna minor

    Cedergreen, Nina, Abbas Poor, M., Sørensen, Helle & Streibig, Jens Carl, 2007, In: Ecotoxicology and Environmental Safety. 67, 3, p. 323-332 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Lecture notes for applied statistics

    Tolver, Anders & Sørensen, Helle, 2007, Frederiksberg: Department of Natural Sciences, University of Copenhagen. 174 p.

    Research output: Book/Report › Compendium/lecture notes › Education

  17. Published

    Reproducibility of binary-mixture toxicity studies

    Cedergreen, Nina, Kudsk, P., Kopp Mathiassen, S., Sørensen, Helle & Streibig, Jens Carl, 2007, In: Environmental Toxicology and Chemistry. 26, 1, p. 149-156 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. 2008
  19. Published

    A review of independent action compared to concentration addition as reference models for mixtures of compounds with different molecular target sites

    Cedergreen, Nina, Christensen, A. M., Kamper, A., Kudsk, P., Matthiassen, S. K., Streibig, Jens Carl & Sørensen, Helle, 2008, In: Environmental Toxicology and Chemistry. 27, 7, p. 1621-1632 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Can the effect of ternary mixtures be predicted from binary mixture toxicity results?

    Svendsen, C., Cedergreen, Nina, Kamper, A. & Sørensen, Helle, 2008. 2 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  21. Published

    Hormesis in Mixtures - Can it be Predicted?

    Belz, R., Cedergreen, Nina & Sørensen, Helle, 2008. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  22. Published

    Hormesis in mixtures - can it be predicted?

    Belz, R. G., Cedergreen, Nina & Sørensen, Helle, 2008, In: Science of the Total Environment. 404, 1, p. 77-87 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. Published

    Independent action compared to concentration addition as reference models for mixtures of compounds with different molecular target sites

    Cedergreen, Nina, Christensen, A. M., Kamper, A., Kudsk, P., Streibig, Jens Carl & Sørensen, Helle, 2008, SETAC Europe 18th Annual Meeting: Extended abstracts. Society of Environmental Toxicology and Chemistry, p. 243-244 2 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  24. Published

    Lecture notes for "Statistisk Dataanalyse 1"

    Ekstrøm, Claus Thorn & Sørensen, Helle, 2008, Department of Natural Sciences, University of Copenhagen. 204 p.

    Research output: Book/Report › Compendium/lecture notes › Education

  25. Published

    Small sample distribution of the likelihood ratio test in the random effects model

    Sørensen, Helle, 2008, In: Journal of Statistical Planning and Inference. 138, 6, p. 1605-1614 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. 2009
  27. Published

    A new mathematical model for combining growth and energy intake in animals: the case of the growing pig

    Strathe, A. B., Sørensen, Helle & Danfær, A. C., 2009, In: Journal of Theoretical Biology. 261, 2, p. 165-175 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. Published

    Canopy photosynthesis and time-of-day application of supplemental light

    Markvart, J., Rosenqvist, Eva, Sørensen, Helle, Ottosen, C. & Aaslyng, J. P. M., 2009, In: HortScience. 44, 5, p. 1284-1290 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  29. Published

    Introduction to statistical data analysis for the life sciences

    Ekstrøm, Claus Thorn & Sørensen, Helle, 2009, Department of Basic Sciences and Environment, University of Copenhagen. 334 p.

    Research output: Book/Report › Compendium/lecture notes › Education

  30. 2010

  31. A multilevel nonlinear mixed-effects approach to model growth in pigs

    Strathe, A. B., Danfær, A. C., Sørensen, Helle & Kebreab, E., 2010, In: Journal of Animal Science. 88, p. 638-649 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    A multivariate nonlinear mixed effects method for analyzing energy partitioning in growing pigs

    Strathe, A. B., Danfær, A. C., Chwalibog, André, Sørensen, Helle & Kebreab, E., 2010, In: Journal of Animal Science. 88, 7, p. 2361-2372 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    A random effects model for binary mixture toxicity experiments

    Sørensen, Helle, Cedergreen, Nina & Streibig, Jens Carl, 2010, In: Journal of Agricultural, Biological, and Environmental Statistics. 15, 4, p. 562-577 16 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. Published

    Agreement between accelerometric symmetry scores and clinical lameness scores during experimentally induced transient distension of the metacarpophalangeal joint in horses

    Thomsen, M. H., Persson, A. B., Tolver, Anders, Sørensen, Helle & Andersen, P. H., 2010, In: Equine Veterinary Journal. 42, Suppl. 38, p. 510-515 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    En introduktion til Statistik

    Ditlevsen, Susanne & Sørensen, Helle, 2010, Museum Tusculanum. 89 p.

    Research output: Book/Report › Compendium/lecture notes › Education

  36. Published

    Hierarchical modelling of temperature and habitat size effects on population dynamics of North Atlantic cod

    Mantzouni, I., Sørensen, Helle, O'Hara, R. B. & MacKenzie, B. R., 2010, In: ICES Journal of Marine Science. 67, 5, p. 833-855 23 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  37. Published

    Symmetry indices based on accelerometric data in trotting horses

    Thomsen, M. H., Tolver, Anders, Sørensen, Helle, Lindegaard, Casper & Andersen, P. H., 2010, In: Journal of Biomechanics. 43, p. 2608-2612 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  38. Published

    Introduction to statistical data analysis for the life sciences

    Ekstrøm, Claus Thorn & Sørensen, Helle, 1 Jan 2010, 1. ed. CRC Press. 409 p.

    Research output: Book/Report › Book › Research › peer-review

  39. 2011
  40. Published

    Goodness-of-fit based on downsampling with applications to linear drift diffusions

    Forman, Julie Lyng, Markussen, Bo & Sørensen, Helle, 2011, In: Scandinavian Journal of Statistics. 38, 2, p. 288-310 23 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. Population based growth curve analysis - a comparison between models based on ordinary or stochastic differential equations implemented in a nonlinear mixed effect framework

    Strathe, A. B., Danfær, A. C., Nielsen, B., Klim, S. & Sørensen, Helle, 2011, Modelling nutrient digestion and utilization in farm animals. Sauvant, Van Milgen, Faverdin & Friggens (eds.). Wageningen Academic Publishers, p. 22-31 10 p.

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  42. 2012
  43. Published

    A first guide to statistical computations in R

    Martinussen, Torben, Skovgaard, I. & Sørensen, Helle, 2012, Biofolia/Samfundslitteratur.

    Research output: Book/Report › Book › Education

  44. Published

    Can the joint effect of ternary mixtures be predicted from binary mixture toxicity results?

    Cedergreen, Nina, Sørensen, Helle & Svendsen, C., 2012, In: Science of the Total Environment. 427-428, p. 229-237 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  45. Published

    Quantification of symmetry for functional data with application to equine lameness classification

    Sørensen, Helle, Tolver, Anders, Thomsen, M. H. & Andersen, P. H., 2012, In: Journal of Applied Statistics. 39, 2, p. 337-360 24 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. 2013
  47. Published

    An introduction with medical applications to functional data analysis

    Sørensen, Helle, Goldsmith, J. & Sangalli, L. M., 2013, In: Statistics in Medicine. 32, 30, p. 5222-5240 19 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  48. 2014
  49. Published

    Analysis of Juggling Data: Registration of Functional Data Subject to Biomechanical Constraints

    Tolver, Anders, Sørensen, Helle, Muller, M. & Mousavi, S. N., 2014, In: Electronic Journal of Statistics. 8, 2, p. 1856-1864

    Research output: Contribution to journal › Journal article › Research › peer-review

  50. Published

    Introduction to Statistical Data Analysis for the Life Sciences

    Ekstrøm, Claus Thorn & Sørensen, Helle, 2014, 2 ed. CRC Press. 514 p.

    Research output: Book/Report › Book › Research › peer-review

  51. 2015
  52. Published

    Discussion of “Analysis of spatio-temporal mobile phone data: a case study in the metropolitan area of Milan” by P. Secchi, S. Vantini, and V. Vitelli

    Sørensen, Helle, Markussen, Bo & Tolver, Anders, 2015, In: Statistical Methods and Applications. 24, 2, p. 321-324

    Research output: Contribution to journal › Comment/debate › Research › peer-review

  53. Published

    Effect of temperature on reproduction and embryonic development of the cabbage stem flea beetle, Psylliodes chrysocephala L., (Coleoptera: Chrysomelidae)

    Mathiasen, Helle, Sørensen, Helle, Bligaard, J. & Esbjerg, Peter, 2015, In: Journal of Applied Entomology. 139, 8, p. 600-608 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  54. Published

    High spatial and fast changes of iron redox state and phosphorus solubility in a seasonally flooded temperate wetland soil

    Prem, M., Hansen, Hans Chr. Bruun, Wenzel, W., Heiberg, L., Sørensen, Helle & Borggaard, Ole K., 2015, In: Wetlands. 35, 2, p. 237-246 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  55. 2016
  56. Published

    A hybridisation barrier between two evolutionary lineages of Barbarea vulgaris (Brassicaceae) that differ in biotic resistances

    Christensen, S., Sørensen, Helle, Jensen, Karen Rysbjerg & Hauser, T. P., 2016, In: Evolutionary Ecology. 30, 5, p. 887-904 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  57. Published

    Coexistence facilitates interspecific biofilm formation in complex microbial communities

    Madsen, Jonas Stenløkke, Røder, Henriette Lyng, Russel, J., Sørensen, Helle, Burmølle, Mette & Sørensen, Søren Johannes, 2016, In: Environmental Microbiology. 18, 8, p. 2565–2574

    Research output: Contribution to journal › Journal article › Research › peer-review

  58. Published

    Coupling bacterioplankton populations and environment to community function in coastal temperate waters

    Traving, Sachia Jo, Bentzon-Tilia, M., Knudsen-Leerbeck, H., Mantikci, M., Hansen, J. L. S., Stedmon, C. A., Sørensen, Helle, Markager, S. & Riemann, Lasse, 2016, In: Frontiers in Microbiology. 7, 13 p., 1533.

    Research output: Contribution to journal › Journal article › Research › peer-review

  59. Published

    Ecotypic differentiation of two sympatric chemotypes of Barbarea vulgaris (Brassicaceae) with different biotic resistances

    Heimes, C., Agerbirk, Niels, Sørensen, Helle, van Mölken, T. & Hauser, T. P., 2016, In: Plant Ecology. 217, 9, p. 1055-1068 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  60. 2017
  61. Published

    Diffusion-Type Models with Given Marginal Distribution and Autocorrelation Function / Introduction

    Sørensen, Helle, 2017, Inference, Asymptotics, and Applications: Selected Papers of Ib Michael Skovgaard, with Introductions by his Colleagues. Reid, N. & Martinussen, T. (eds.). World Scientific, p. 263-269

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  62. Published

    Micro vertical changes in soil pH and base cations over time after application of wood ash on forest soil

    Hansen, M., Bang-Andreasen, T., Sørensen, Helle & Ingerslev, Morten, 2017, In: Forest Ecology and Management. 406, p. 274-280 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  63. Published

    Multinomial functional regression with wavelets and LASSO penalization

    Mousavi, S. N. & Sørensen, Helle, 2017, In: Econometrics and Statistics. 150–166

    Research output: Contribution to journal › Journal article › Research › peer-review

  64. Published

    The effect of increased loads of dissolved organic matter on estuarine microbial community composition and function

    Traving, Sachia Jo, Rowe, O., Jakobsen, N. M., Sørensen, Helle, Dinasquet, J. V., Stedmon, C. A., Andersson, A. & Riemann, Lasse, 2017, In: Frontiers in Microbiology. 8, 15 p., 351.

    Research output: Contribution to journal › Journal article › Research › peer-review

  65. 2018
  66. Published

    Biological control of rice sheath blight using hyphae-associated bacteria: development of an in planta screening assay to predict biological control agent performance under field conditions

    Nicolaisen, Mette Haubjerg, Nguyen Duc Cuong, Herschend, J., Jensen, Birgit, Le Cam Loan, Pham Van Du, Sørensen, Jan, Sørensen, Helle & Olsson, S., 2018, In: BioControl. 63, 6, p. 843-853

    Research output: Contribution to journal › Journal article › Research › peer-review

  67. Published

    Cellular shear stiffness reflects progression of arsenic-induced transformation during G1

    Muñoz, A., Eldridge, W. J., Jakobsen, N. M., Sørensen, Helle, Wax, A. & Costa, M., 2018, In: Carcinogenesis. 39, 2, p. 109–117 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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