Det Biovidenskabelige Fakultet - Københavns Universitetwww.life.ku.dkFaculty of Life Sciences

Publications by Anders Ringgaard Kristensen in reverse chronological order

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2019

Hindsborg, J. & A.R. Kristensen. 2019. From data to decision – Implementation of a sow replacement model. Computers and Electronics in Agriculture 165.

 

Klaaborg, J,  T.N. Carl, T.S. Bruunb, A.V. Strathea, J.K. Bache, A.R. Kristensen & C. Amdi. 2019. The effect of feeding strategy during rearing in a commercial setting on gilt body condition, lactation performance and culling rate in modern sows nursing large litters. Livestock Science 228, 144–150.

 

Engelsmann, M.N., C.F. Hansen, M.N. Nielsen, A.R. Kristensen & C. Amdi. 2019. Glucose Injections at Birth, Warmth and Placing at a Nurse Sow Improve the Growth of IUGR Piglets. Animals 9, 519. [Full text]

 

Lynegaard, J.C., C.F. Hansen, A.R. Kristensen & C. Amdi. 2019. Body composition and organ development of intra-uterine growth restricted pigs at weaning. Animal. In press. 

 

Klaaborg, J., A.R. Kristensen & P. Brandt. 2019. The effect of pen environment on pen-mate directed behaviour prior to feeding in finisher pigs with intact tails. Livestock Science 219, 35-39.

 

Keshavarzi, H., A. Sadeghi-Sefidmazgi, A.H. Stygar & A.R. Kristensen. 2019. Abortion and other risk factors for mastitis in Iranian dairy herds. Livestock Science 219, 40-44.

 

Dominiak, K.N., J. Hindsborg, L.J. Pedersen & A.R. Kristensen. 2019. Spatial modeling of pigs’ drinking patterns as an alarm reducing method. II. Application of a multivariate dynamic linear model. Computers and Electronics in Agriculture 161, 92-103. [Full text]

 

Dominiak, K.N., L.J. Pedersen & A.R. Kristensen. 2019. Spatial modeling of pigs’ drinking patterns as an alarm reducing method. I. Developing a multivariate dynamic linear model. Computers and Electronics in Agriculture 161, 79-91. [Full text].

 

2018

Stygar, A.H. & A.R. Kristensen. 2018. Detecting abnormalities in pigs growth - a dynamic linear model with diurnal growth pattern for identified and unidentified pigs. Computers and Electronics in Agriculture 155, 180-189.

 

Stygar, A.H., K. Dolecheck & A.R. Kristensen. 2018. Analyses of body weight patterns in growing pigs - A new view on body weight in pigs for frequent monitoring. Animal 12, 295-302. [Full text]

 

Nielsen, S.E., A.R. Kristensen & V.Aa. Moustsen. 2018. Litter size of Danish crossbred sows increased without changes in sow body dimensions over a thirteen year period. Livestock Science 209, 73-76.

 

2017

Keshavarzi, H., A. Sadeghi-Sefidmazgi, A.H. Stygar & A.R. Kristensen. 2017. Effects of abortion and other risk factors on conception rate in Iranian dairy herds. Livestock Science 206, 51-58.

 

Stygar, A.H., M.A. Krogh, T. Kristensen, S. Østergaard & A.R. Kristensen. 2017. Multivariate dynamic linear models for estimating the effect of experimental interventions in an evolutionary operations setup in dairy herds. Journal of Dairy Science 100, 5758-5773.

 

Jensen, D.B., N. Toft & A.R. Kristensen. 2017. A multivariate dynamic linear model for early warnings of diarrhea and pen fouling in slaughter pigs. Computers and Electronics in Agriculture 135, 51-62.

 

Dominiak, K.N. & A.R. Kristensen. 2017. Prioritizing alarms from sensor-based detection models in livestock production - A review on model performance and alarm reducing methods. Computers and Electronics 133, 46-67. [Full text]

 

Keshavarzi, H., A. Sadeghi-Sefidmazgi, A.R. Kristensen & A.H. Stygar. 2017. Abortion studies in Iranian dairy herds: I. Risk factors for abortion. Livestock Science 195, 45-52. [Full text]

 

2016

Cha, E., R.L. Smith, A.R. Kristensen, J.A. Hertl, Y.H. Schukken, L.W. Tauer, F.L. Welcome & Y.T. Gröhn. 2016. The value of pathogen information in treating clinical mastitis. Journal of Dairy Research 83, 456-463.

 

Jørgensen, C.H., A.R. Kristensen, S. Østergaard & T.W. Bennedsgaard. 2016. Use of online measures of L-lactate dehydrogenase for classification of posttreatment mammary Staphyloccus aureus infection status in dairy cattle. Journal of Dairy Science 99, 8375-8383.

 

Stygar, A.H., M.A. Krogh, S. Østergaard & A.R. Kristensen. 2016. Tool for assessing the intervention effect on milk production in an evolutionary operation setup. Conference on Precision Dairy Farming. Leeuwarden, The Netherlands 21-23 June 2016. p. 233-237. [Full text]

 

Kessels, J.A., E. Cha, S.K. Johnson, F.L. Welcome, A.R. Kristensen & Y.T. Gröhn. 2016. Economic comparison of common treatment protocols and J5 vaccination for clinical mastitis in dairy herds using optimized culling decisions. Journal of Dairy Science 99, 3838-3847.
 

Stygar, A.H. & A.R. Kristensen. 2016. Monitoring growth in finishers by weighing selected groups of pigs – a dynamic approach. Journal of Animal Science 94, 1255-1266.

 

Pourmoayed, R., L.R. Nielsen & A.R. Kristensen. 2016. A hierarchical Markov decision process modeling feeding and marketing decisions of growingh pigs. European Journal of Operational Research 250, 925-938. [Full text]

 

Jensen, D.B. & A.R. Kristensen. 2016. Temperature as a predictor of fouling and diarrhea in slaughter pigs. Livestock Science 183, 1-3.

 

2015

Kristensen, A.R. & D.B. Jensen. 2015. The intelligent pig barn. International conference on pig welfare: Improving Pig Welfare - what are the ways forward? Copenhagen, 29-30 April 2015. p. 34-37.

 

Kristensen, A.R. 2015. From biological models to economic optimization. Preventive Veterinary Medicine 118, 226-237. [Full text]

 

Nielsen, L.R. & A.R. Kristensen. 2015. Markov Decision Processes to Model Livestock Systems. In: Plà-Aragonés, L.M. (Ed.): Handbook of Operations Research in Agriculture and the Agri-Food Industry. International Series in Operations Research & Management Science. Volume 224, Chapter 19, 419-454. Springer, New York.

 

2014

Cornou, C., S. Østergaard, M.L. Ancker, J. Nielsen & A.R. Kristensen. Dynamic monitoring of reproduction records for dairy cattle. Computers and Electronics in Agriculture 109, 191-194. [Full text]

 

Bono, C., C. Cornou, S. Lundbye-Christensen & A.R. Kristensen. 2014. Dynamic production monitoring in pig herds III: Modeling and monitoring mortality rate at herd level. Livestock Science 168, 128-138. [Full text]

 

Cornou, C., & A.R. Kristensen. 2014. Monitoring individual activity before, during and after parturition using sensors for sows with and without straw amendment. Livestock Science 168, 139-148.

 

Plà-Aragonés, L.M., B. Vizvári & A.R. Kristensen. 2014. Methods and applications in natural resources management. Annals of Operations Research 219, 1-3.

 

Ge, L., A.R. Kristensen, M.C.M. Mourits & R.B. Huirne. 2014. A new decision support framework for managing foot-and-mouth disease epidemics. Annals of Operations Research 219, 49-62.

 

Jørgensen, E., A.R. Kristensen & D. Nilsson. 2014. Markov LIMID processes for representing and solving renewal problems. Annals of Operations Research 219, 63-84. [Full text]

 

Stygar, A.H., A.R. Kristensen & J. Makulska. Optimal management of replacement heifers in a beef herd: A model for simultaneous optimization of rearing and breeding decisions. Journal of Animal Science 92, 3398-3406. [Full text]

 

Cha, E., A.R. Kristensen, J.A. Hertl, Y.H. Schukken, L.W. Tauer, F.L. Welcome, & Y.T. Gröhn. 2014. Optimal insemination and replacement decisions to minimize the cost of pathogen specific clinical mastitis in dairy cows. Journal of Dairy Science 97, 2102-2117. [Full text]

 

2013

Cornou, C. & A.R. Kristensen. 2013. Use of information from monitoring and decision support in pig production: collection, applications and expected benefits. Livestock Science 157, 552-567. [Full text]

 

Bono, C., C. Cornou, S. Lundbye-Christensen & A.R. Kristensen. 2013. Dynamic production monitoring in pig herds II: Modeling and monitoring farrowing rate at herd level. Livestock Science 155, 92-102. [Full text]

 

Escalante, H. J., S.V. Rodriguez, J. Cordero, A.R. Kristensen & C. Cornou. 2013. Sow-activity classification from acceleration patterns: A machine learning approach. Computers and Electronics in Agriculture 93, 17–26. [Full text]
 

2012

Bono, C., C. Cornou & A.R. Kristensen. 2012. Dynamic production monitoring in pig herds I. Modeling and monitoring litter size at herd and sow level. Livestock Science 149, 289-300. [Full text]

 

Kristensen, A.R. 2012. Produktionsdyrenes liv og død. In: Gjerris, M., R. Klingenberg, G. Meyer & G. Tveit (eds.): Kød – En antologi. Tiderne Skifter, København. ISBN 978-87-7973-497-5.

 

Kristensen, A. R., L. Nielsen & M.S. Nielsen. 2012. Optimal slaughter pig marketing with emphasis on information from on-line live weight assessment. Livestock Science 145, 95-108. [Full text]

 

Jensen, T.B., N. Toft, M.K. Bonde, A.G. Kongsted, A.R. Kristensen & J.T. Sørensen. 2012. Herd and sow-related risk factors for mortality in sows in group-housed system. Preventive Veterinary Medicine 103, 31-37.

 

Brandt, P., V.Aa. Moustsen, M.B.F. Nielsen & A.R. Kristensen. 2012. Floor heating at farrowing in pens for loose-housed sows. Livestock Science 143, 1-4.

 

2011

Demeter, R.M., A.R. Kristensen, J. Dijkstra, A.G.J.M. Oude Lansink, M.P.M. Meuwissen & J.A.M. van Arendonk. 2011. A multi-level hierarchic Markov process with Bayesian updating for herd optimization and simulation in dairy cattle. Journal of Dairy Science 94, 5938-5962. [Full text]
 

Danholt, L., V.Aa. Moustsen, M.B.F. Nielsen & A.R. Kristensen. 2011. Rolling behaviour of sows in relation to piglet crushing on sloped versus level floor pens. Livestock Science 141, 59-68. [Full text]

 

Marchioro, G.F., C. Cornou, A.R. Kristensen & J. Madsen. 2011. Sows' Activity Classification Device using Acceleration Data - a Resource Constrained Approach. Computers and electronics in Agriculture 77, 110-117. [Full text]


Pedersen, M.L., V.Aa. Moustsen, M.B.F. Nielsen & A.R. Kristensen. 2011. Improved udder access prolongs duration of milk letdown and increases piglet weight gain. Livestock Science 140, 253-261. [Full text]


Cornou, C., S. Lundbye-Christensen & A.R. Kristensen. 2011. Modeling and monitoring sows' activity types in farrowing house using acceleration data. Computers and Electronics in Agriculture 76, 316-324. [Full text]


Rodríguez, S.V., T.B. Jensen, L.M. Plà & A.R. Kristensen. 2011. Optimal replacement policies and economic value of clinical observations in sow herds. Livestock Science 138, 207-219. [Full text]

 

Demeter, R.M., H. Bovenhuis, A.R. Kristensen, A.G.J.M. Oude Lansink, M.P.M. Meuwissen & J.A.M. van Arendonk. Farm level economic implications of genetic selection for improving milk fat composition. EAAE 2011 Congress, Change and Uncertainty, Challenges for Agriculture, Food and Natural Resources, August 30 to September 2, 2011, ETH Zurich, Zurich, Switzerland 09/2011.

 

2010

Ge, L., M.C.M. Mourits, A.R. Kristensen & R.B.M. Huirne. 2010. A modelling approach to support dynamic decision-making in the control of FMD epidemics. Preventive Veterinary Medicine 95, 167-174.

 

Ostersen, T., C. Cornou & A.R. Kristensen. 2010. Detecting oestrus by monitoring sows’ visits to a boar. Computers and Electronics in Agriculture 74, 51-58. [Full text]

 

Ettema, J., S. Østergaard & A.R. Kristensen. 2010. Modelling the economic impact of three lameness causing diseases using herd and cow level evidence. Preventive Veterinary Medicine 95, 64-73. [Full text]

 

Nielsen, L.R., E. Jørgensen, A. R. Kristensen & S. Østergaard. 2010. Optimal replacement policies for dairy cows based on daily yield measurements. Journal of Dairy Science 93, 75-92. [Full text]

 

2009

Ettema, J.F., S. Østergaard & A.R. Kristensen. 2009. Estimation of probability for the presence of claw and digital skin diseases by combining cow- and herd-level information using a Bayesian network. Preventive Veterinary Medicine 92, 89-98. [Preprint]

 

Jensen, T. B., A.R. Kristensen, N. Toft, N.P. Baadsgaard, S. Østergaard & H. Houe. 2009. An object-oriented Bayesian network modeling the causes of leg
disorders in finisher herds
. Preventive Veterinary Medicine 89, 237-248.  

 

Ge, L., M.C.M. Mourits, A.R. Kristensen & R.B.M Huirne. 2009. Integrated modelling to support flexible decision making in the control of foot-and-mouth disease.

In: Proceedings of the 12th International symposium on Veterinary Epidemiology and Economics, Durban, South Africa, August 10-14, 2009. - Durban, South Africa: ISVEE, 2009.

 

2008

Cornou, C., J. Vinther & A.R. Kristensen. 2008. Automatic detection of oestrus and health disorders using data from Electronic Sow Feeders. Livestock Sciencre 118, 262-271. [Full text]

 

2007

Jensen, T.B., A.R. Kristensen & N. Toft. 2007. Modeling the causes of leg disorders in finisher herds. XIII International congress in animal hygiene : ISAH - 2007, Estonia. p417-422.

 

Nielsen, B.K. & A.R. Kristensen. 2007. Optimal decisions in organic beef production from steers – effects of criterion of optimality and price changes. Livestock Science 110, 25-32. [Full text]

 

Ge, L., R.B.M. Huirne, M.C.M. Mourits, Ó. Gutiérrez & A.R. Kristensen. 2007. Discovering real options in the optimal control of foot-and-mouth disease. International workshop held at Research Centre Foulum 9-10 November 2006. DJF Animal Science 77, 51-55.

 

Nielsen, B., S.M. Thamsborg & A.R. Kristensen. 2007. Skru ned for studenes tilvækst om vinteren. Økologisk Jordbrug 378, 11.

 

Nielsen, B., S.M. Thamsborg & A.R. Kristensen. 2007. Slutfedning betaler sig ikke. Økologisk Jordbrug 378, 11.

 

2006

Kristensen, A.R., E. Jørgensen & N. Toft. 2006. Herd Management Science. Preliminary Edition compiled for the Advanced Herd Management course, KVL, August 28th - November 3rd, 2006, The Royal Veterinary and Agricultural University. 340 pp.

 

Nielsen, L.R. & A.R. Kristensen. 2006. Finding the K best policies in a finite-horizon Markov decision process. European Journal of Operational Research 175, 1164-1179. [Full text]

 

Kristensen, A.R. 2006. Muligheder med IT. Kongres for svineproducenter 2006, 99-100. Dansk Svineproduktion.

 

Houe H, N.P. Baadsgaard, H.D. Emborg, C. Enevoldsen, A.K. Ersbøll, B. Forkman, M. Greiner, T.B. Jensen, A.R. Kristensen, T. Mark, L.R. Nielsen, S.S. Nielsen, P.

Sandøe, H. Stege, P.T. Thomsen, N. Toft N & G. Tveit. 2006. Guidelines for database protocols on disease and welfare recording. Proceedings of the 11th Symposium of the International Society for Veterinary Epidemiology and Economics, Cairns, Australia: ISVEE 11, 891, 2006

 

Hansen, M.S. & A.R. Kristensen. 2006. LIMIDs for decision support in pig production. EURO XXI. 21st European Conference on Operational Research, Reykjavik, Iceland, July 2-5. Abstract: Journal of Agricultural Science 144, 468.

 

Ge, L., A. Kristensen, M. Mourits & R. Huirne. 2006. The ‘curse of animal disease’ and the ‘curse of dimensionality’ : A new decision support framework for the control of foot-and-mouth disease epidemics. EURO XXI. 21st European Conference on Operational Research, Reykjavik, Iceland, July 2-5. Abstract: Journal of Agricultural Science 144, 468.

 

2005

Heiskanen, T., A.R. Kristensen, C. Cornou & P. Bonnet, 2005. Trådløs overvågning - fremtidens værktøj i løsdriftsstalden. Hyologisk, June 2005, 31-33.

 

Madsen, T.N. & A.R. Kristensen. 2005. A model for monitoring the condition of young pigs by their drinking behavior. Computers and Electronics in Agriculture 48, 138-154. [Full text]

 

Madsen, T.N., S. Andersen & A.R. Kristensen. 2005. Modelling the drinking pattern of young pigs using a state space model. Computers and Electronics in Agriculture 48, 39-62. [Full text]

 

Toft, N., A.R. Kristensen & E. Jørgensen. 2005. A framework for decision support related to infectious diseases in slaughter pig fattening units. Agricultural Systems 85, 120-137.

 

Nielsen, L.R. & A.R. Kristensen. 2005. Risk management in forestry - Possible solution approaches. Dina Notat No. 111.

 

2004

Nielsen, L.R & A.R. Kristensen. 2004. Finding the K best policies in finite-horizon Markov decision processes. Dina Research Report 110.

 

Nielsen, L.R. & A.R. Kristensen. 2004. Risk aversion in Markov decision processes. EDWA-04 European Workshop for Decision Problems in Agriculture and Natural Resources, 71-82. Silsoe, England 27th - 28th September, 2004.

 

Nielsen, B.K., A.R. Kristensen & S.M. Thamsborg. 2004. Optimal decisions in organic steer production – a model including winter feed level, grazing strategy and slaughtering policy. Livestock Production Science 88, 239-250.

 

McAinsh, C.V. & A.R. Kristensen. 2004. Dynamic modelling of a traditional African chicken production system. Tropical Animal Health and Production 36, 609-626.

 

Kristensen, A.R. & T.A. Søllested. 2004. A sow replacement model using Bayesian updating in a three-level hierarchic Markov process. I. Biological model. Livestock Production Science 87, 13-24. [Full text]

 

Kristensen, A.R. & T.A. Søllested. 2004. A sow replacement model using Bayesian updating in a three-level hierarchic Markov process II. Optimization model. Livestock Production Science 87, 25-36. [Full text]

 

2003

Lien, G., A.R. Kristensen, A. Hegrenes & J.B. Hardaker. 2003. Optimal length of leys in an area with winter damage problems. Grass and Forage Science 58, 168-177. [Full text]

 

Kristensen, A.R. & C.V. Pedersen. 2003. Representation of uncertainty in a Monte Carlo simulation model of a scanvenging chicken production system. EFITA 2003. Fourth European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment, Debrecen, Hungary, July 5-9.

 

Kristensen, A.R. 2003. Optimal slaughter pig marketing with emphasis on information from on-line live weight assessment. EFITA 2003. Fourth European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment, Debrecen, Hungary, July 5-9.

 

Hegrenes, A., A.R. Kristensen & G. Lien. 2003. Optimal economic length of leys: a dynamic programming approach. 25th International Conference of Agricultural Economists, Durban, South Africa, August 16-22.

 

Kristensen, A.R. 2003. A general software system for Markov decision processes in herd management applications. Computers and Electronics in Agriculture 38, 199-215. [Full text]

 

Toft, N., A.R. Kristensen & E. Jørgensen. 2003. Exploring the Cost-Benefit of Vaccines for Infectious Diseases in Slaughter Pig Production. Acta Veterinaria Scandinavica 44 (Suppl. 1), 55.

 

2002:

Pedersen, C.V., A.R. Kristensen & J. Madsen. On-farm research leading to a dynamic model of a traditional chicken production systemTanzania Society of Animal Production and Tanzania Veterinary Association. Joint Annual Conference, 3-5 December 2002, Arusha, Tanzania.

 

Nilsson, D. & A.R. Kristensen. 2002. Markov LIMID Processes for representing and solving renewal problems. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources. Toulouse, France, September 19-20. 

 

Søllested, T.A. & A.R. Kristensen. 2002. A sow replacement model using Bayesian updating in a 3-level hierarchic Markov process. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources. Toulouse, France, September 19-20. 

 

Kristensen, A.R. & G. Lien. 2002. Optimal length of leys in an area with winter damage problems. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources. Toulouse, France, September 19-20. 

 

Nielsen, B.K. & A.R. Kristensen. 2002. A model for simultaneous optimization of feeding level and slaughtering policy of organic steers. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources. Toulouse, France, September 19-20. 

 

2001:

Kristensen, A.R. & T.A. Søllested. 2001. A sow replacement model using Bayesian updating in a 3-level hierarchic Markov process. Dina Research Report No. 96.

 

Kristensen, A.R. (Ed.) 2001. Dina Research School: Workshop December 6-7, 2001. Dina Notat No. 95.

 

Toft, N., A.R. Kristensen & E. Jørgensen. 2001. Exploring the cost-benefit of vaccines for infectious diseases in slaughter pig production. 11th International Conference on Production Diseases in Farm Animals.

 

Houe, H., J.T. Sørensen, L. Otto, A.R. Kristensen, P. Bækbo, J.Y. Blom & S. Østergaard (eds.). 2001. Animal Health Economics. Proceedings of workshop held by Research Centre for the Management of Animal Production and Health at Danish Institute of Agricultural Sciences, Foulum, Denmark - August 17th - 18th, 2001. CEPROS report no. 7.

 

Søllested, T.A., A.R. Kristensen & T.N. Madsen. 2001. Electronic monitoring of eating behaviour as an indicator for oestrus in group housed sows. EFITA 2001. Third European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment, Montpellier, France, June 18-20. pp 337-342.

 

Toft, N., A.R. Kristensen & E. Jørgensen. 2001. Tradeoff's in modeling epidemic disease in slaughter pig production. EFITA 2001. Third European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment, Montpellier, France, June 18-20. pp 391-396.

 

Kristensen, A.R. 2001. Computer demonstration: A general software system for dynamic programming. EFITA 2001. Third European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment, Montpellier, France, June 18-20. pp 379-384.

 

Kristensen, A.R. 2001. Hvilke faktorer påvirker produktion og dyreomsætning?  Dansk Boologisk selskabs seminar 19. og 20. april 2001. Hotel Pejsegården, Brædstrup, pp 20-25

 

2000:

Toft, N., A.R. Kristensen & E. Jørgensen. 2000. A framework for decision support related to an infectious disease in slaughter pig production. Proceedings of the Symposium on Economic Modelling of Animal Health and Farm Management. Wageningen, The Netherlands, November 23-24, pp 109-118.

 

Kristensen, A.R. & E. Jørgensen. 2000. Multi-level hierarchic Markov processes as a framework for herd management support. Annals of Operations Research 94, 69-89.

 

Østergaard, S., J.T. Sørensen & A.R. Kristensen. 2000. A stochastic model simulating the feeding-health-production complex in a dairy herd. Journal of Dairy Science 83, 721-733.

 

Kristensen, A.R. 2000. A software system for multi-level hierarchic Markov processes International Symposium on Pig Herd Management Modelisation. Lleida, Spain, September 18-20, pp 37-46.

 

Søllested, T.A. & A.R. Kristensen. 2000. A multi-process dynamic linear model for oestrus detection in group housed sows by modeling eating behaviour. International Symposium on Pig Herd Management Modelisation. Lleida, Spain, September 18-20, pp 117-126.

 

Kristensen, A.R. (Ed.). 2000. Dinas Forskerskole: Workshop den 6-7 april 2000. Dina Notat No. 87.

 

Thysen, I. & A.R. Kristensen (eds.). 2000. Computers and Electronics in Agriculture, Special Issue, The First European Conference for information Technology in Agriculture. Vol. 25, No. 3.

 

1999:

Mourits, M.C.M., R.B.M. Huirne, A.A. Dijkhuizen, A.R. Kristensen & D.T. Galligan. 1999. Economic optimization of dairy heifer management decisions. Agricultural Systems 61, 17-31.  [Full text]

 

Makulska, J. & A.R. Kristensen. 1999. Economic optimization of bull fattening. Proceedings of the Second European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment. September 27-30, University of Bonn.

 

Kristensen, A.R. (Ed.). 1999. Dinas Forskerskole: Workshop den 22-23 april 1999. Dina Notat No. 82.

 

Mogensen, L., J.T. Sørensen, J. Hindhede, L.H. Nielsen & A.R. Kristensen. 1999. Effect of space allowance and access to bedding in slatted-floor housing systems during second-year rearing on subsequent milk production of primiparious dairy cows. Acta Agriculturæ Scandinavica, Section A, Animal Science 49, 49-56.

 

Kristensen, A.R & E. Jørgensen. 1999. Decision Support Models. Proceedings 25th International Dairy Congress, 21-24 September 1998, Aarhus, Denmark. Vol. III, Future Milk Farming, 145-163.

 

1998:

Kristensen, A.R. (Ed.). 1998. Dinas Forskerskole: Workshop den 3-4. december 1998. Dina Notat No. 79.

 

Jørgensen, E. & A.R. Kristensen. (1998). Edb letter beslutningen. Landsbladet Svin, 11, November 1988, p. 18.

 

Kristensen, A.R. (Ed.). 1998. Dinas Forskerskole: Workshop den 23-24. april 1998. Dina Notat No. 67.

 

Kristensen, A.R. 1998. Hvilke overvejelser ligger bag valg af udsætterkøer? Hvilken indflydelse har forskellige forhold på udsætningen af køer? Dansk Boologisk selskabs seminar 17. og 18. september 1998. Hotel Pejsegården, Brædstrup.

 

1997:

Kristensen, A.R. (Ed.). 1997. Dinas Forskerskole: Workshop den 4.-5. december 1997. Dina Notat No. 62.

 

Toft, N. & A.R. Kristensen. 1997. The parameter input file for the multi-level hierarchic Markov process. Dina Notat No. 60.

 

Kristensen, A.R. & E. Jørgensen. 1997. Simultaneous optimization of management decisions at the operational and tactical levels in animal production. In: Huirne et al. (eds.): Risk Management Strategies in Agriculture. State of the art and future perspectives. Mansholt Studies 7, Chapter 17, pp 215-223.

 

Kure, H., I. Thysen & A.R. Kristensen (eds.). 1997. Proceedings. First European Conference for Information Technology in Agriculture. The Royal Veterinary and Agricultural University, Copenhagen, Denmark, 15-18 June 1997. 500 pp.

 

Kristensen, A.R. (Ed.) 1997. Proceedings of the Dutch/Danish Symposium on Animal Health and Management Economics, Copenhagen, January 23-24 1997. Dina Notat No. 56.

 

1996:

Møller, S.H., J.T. Sørensen & A.R. Kristensen. 1996. The concepts of systematic operation programmes for improvement of health and welfare management in mink. 4th International Livestock Farming Systems Symposium, Foulum, Denmark, August 22-23.

 

Kristensen, A.R. 1996. Textbook notes of herd management: Dynamic programming and Markov decision processes. Dina Notat No. 49.

 

Kristensen, A.R. & E. Jørgensen. 1996. Textbook notes of herd management: Basic concepts. Dina Notat No. 48.

 

Jørgensen, E., C. Dethlefsen & A.R. Kristensen. 1996. Systems for monitoring and decision support with respect to sow longevity. In: V. Danielsen (ed.): NJF-Utredning/Rapport Nr. 111. Proceeding of NJF-seminar no. 265, Longevity of sows, Research Centre Foulum, Denmark, 27.-28. March 1996.

 

Østergaard, S., J.T. Sørensen, J. Hindhede & A.R. Kristensen. 1996. Technical and economic effects of feeding one vs. multiple total mixed rations estimated by stochastic simulation under different dairy herd and management characteristics. Livestock Production Science 45, 23-33.

 

Kristensen, A.R. & E. Jørgensen. 1996. Multi-level hierarchic Markov processes as a framework for herd management support. Dina Research Report No. 41. 25 pp.

 

Kristensen, A.R. & E. Jørgensen. 1996. Simultaneous optimization of management decisions at the operational and tactical level in animal production. In: Risk Management Strategies in Agriculture: State of the art and Future Perspectives. EUNITA-Seminar, January 7-10, 1996, Wageningen, The Netherlands.

 

1995:

Jørgensen, E., E.M. Vestergaard & A.R. Kristensen. 1995. Modelling of respiratory diseases in slaughter pigs, working paper: Generic disease model. Dina Notat No. 40. 18 pp.

 

Kristensen, A. R. 1995. Book Review: E.H.P. Houben: Economic optimization of decisions with respect to dairy cow health management. Tijdschrift voor sociaal wetenschappelijk onderzoek van de landbouw 10, 212-213.

 

Kristensen, A.R. & E. Jørgensen. 1995. Applicational perspectives of recent developments in dynamic programming methods for herd management support. Dina Notat No. 33. 14 pp.

 

Jørgensen, E. & A. R. Kristensen. 1995. An object oriented simulation model of a pig herd with emphasis on information flow. Dina Research Report No. 32.11 pp.

 

Jørgensen, E. & A.R. Kristensen. 1995. An object oriented simulation model of a pig herd with emphasis on information flow. In: FACTs 95 March 7, 8, 9, 1995, Orlando, Florida, Farm Animal Computer Technologies Conference, pp. 206-215. [Full text]

 

Kristensen, A.R. & E. Jørgensen. 1995. The application of Markov decision processes as a framework for decision support in animal production. In: FACTs 95 March 7, 8, 9, 1995, Orlando, Florida, Farm Animal Computer Technologies Conference, pp. 136-145. [Full text]

 

Clausen, S.M., J.T. Sørensen & A.R. Kristensen. 1995. Technical and economic effects of culling and reproduction strategies in dairy cattle herds estimated by stochastic simulation. Acta Agriculturæ Scandinavica Section A, Animal Science 45, 64-73. [Full text]

 

1994:

Kristensen. A.R. 1994. Dynamic programming as a framework for decision support in animal production. Dina Workshop on Informatics in Agriculture, 8-9 December 1994: Supplementary note. Dina Notat No. 27. 23 pp.

 

Houben, E. P. H., R. B. M. Huirne, A. A. Dijkhuizen & A. R. Kristensen. 1994. Optimal replacement of mastitis cows determined by a hierarchic Markov process. Journal of Dairy Science 77, 2975-2993. [Full text]

 

Kristensen, A. R. 1994. A survey of Markov decision programming techniques applied to the animal replacement problem. European Review of Agricultural Economics 21, 73-93. [Full text]

 

1993:

Kristensen, A. R. 1993. En vurdering af nøgletallene for produktion på grundlag af principielle overvejelser. Boologisk Selskabs seminar 16./17. september 1993, Pejsegården, Brædstrup. 5 pp.

 

Kristensen, A. R. 1993. Markov decision programming techniques applied to the animal replacement problem. Dissertation for the D.Sc. degree. Dina KVL, Department of Animal Science and Animal Health. Copenhagen.

 

Clausen, S., J. T. Sørensen & A. R. Kristensen. 1993. Effect of culling and reproduction strategies in dairy cattle herds, estimated by SIMHERD. In: Hogeveen, H.: Proceedings of the Symposium on Herd Health Decision Support. Utrecht, June 15-16. (Report No. SKBS/B2/93-13). pp 173-184.

 

Kristensen, A. R. 1993. A feed ration formulation program for PC to be used in education at university level. In: Annevelink, E., R. K. Oving & H. W. Vos (ed): Proceedings XXV CIOSTA-CIGR V Congress, Farm planning, Labour and labour conditions, Computers in agricultural management. Wageningen, The Netherlands, May 10-13. pp 332-338.

 

Kristensen, A. R. 1993. Bayesian updating in hierarchic Markov processes applied to the animal replacement problem. European Review of Agricultural Economics 20, 223-239. [Full text]

 

Kristensen, A. R. 1993. Undervisningen i produktionsstyring. Status og forslag til handlingsplan. Internal note. 11 pp.

 

1992:

Kristensen, A. R. 1992. Optimal replacement in the dairy herd: A multi component system. Agricultural Systems 39, 1-24. [Full text]

 

1991:

Kristensen, A. R. 1991. Maximization of net revenue per unit of physical output in Markov decision processes. European Review of Agricultural Economics 18, 231-244. [Full text]

 

Kristensen, A. R. & I. Thysen. 1991. Ranking of dairy cows for replacement. Alternative methods tested by stochastic simulation. Acta Agriculturæ Scandinavica 41, 295-303. [Full text]

 

Kristensen, A. R. & I. Thysen. 1991. Economic value of culling information in the presence and absence of a milk quota. Acta Agriculturæ Scandinavica 41, 129-135. [Full text]

 

1990:

Kristensen, A. R. 1990. Et PC-program til undervisningsbrug. Ugeskrift for Jordbrug, no 27/28:430-433.

 

Kristensen, A. R. 1990. Value of culling information with and without milk quota. I: J. T. Sørensen & I. Thysen (red.): Modelling of livestock herd production systems. An international workshop. Foulum, Denmark 22-23 march 1990. 11 pp.

 

1989:

Kristensen, A. R. 1989. Rangering af malkekøer med henblik på udskiftning. Forskellige beregningsmetoder testet ved stokastisk simulering. II. Internal Report. Department of Animal Science. Royal Veterinary and Agriculturel University. No. 2. 25 pp.

 

Kristensen, A. R. 1989. Rangering af malkekøer med henblik på udskiftning. Forskellige beregningsmetoder testet ved stokastisk simulering. I. Internal Report. Department of Animal Science. Royal Veterinary and Agricultural University. No. 1. 43 pp.

 

Kristensen, A. R. 1989. Manual til Replace. PC-version 1.1. OS/2 1.0. Beregning og analyse af udskiftnings-strategier samt simulering. Brugermanual til udskrivning direkte fra REPLACE-programmellet under operativsystemet OS/2 (også on-line tilgængelig på skærmen). Internal note. 42 pp.

 

Kristensen, A. R. 1989. Manual til Replace. PC-version 1.1. DOS 3.30. Beregning og analyse af udskiftnings-strategier samt simulering. Brugermanual til udskrivning direkte fra REPLACE-programmellet under operativsystemet DOS (også on-line tilgængelig på skærmen). Internal note. 42 pp.

 

Kristensen, A. R. 1989. Optimal replacement and ranking of dairy cows under milk quotas. Acta Agriculturæ Scandinavica 39, 311-318. [Full text]

 

1988:

Kristensen, A. R. 1988. Dokumentation af programmel til beregning af optimale udskiftningsstrategier samt tekniske og økonomiske nøgletal for mælkeproduktionen på bedriftsniveau. (Brugermanual). Internal Report. Department of Animal Science. Royal Veterinary and Agricultural University. No. 1. 35 pp.

 

Kristensen, A. R. 1988. Sammenligning af resultater fra en detaljeret og en forenklet udskiftningsmodel for malkekoen. Intern report. 11 pp.

 

Kristensen, A. R. 1988. Optimization techniques in replacement models. In: S. Korver & J. A. M. van Arendonk: Modelling of Livestock Production Systems. Kluwer Academic Publishers. Dordrecht. pp 97-104.

 

Kristensen, A. R. 1988. Hierarchic Markov processes and their applications in replacement models. European Journal of Operational Research 35, 207-215. [Full text]

 

1987:

Kristensen, A. R. 1987. Optimal replacement and ranking of dairy cows determined by a hierarchic Markov process. Livestock Production Science 16, 131-144. [Full text]

 

1986:

Kristensen, A. R. 1986. A model to describe and predict the production and food intake of the dairy cow. Acta Agriculturæ Scandinavica 36, 305-317. [Full text]

 

Kristensen, A. R. & V. Østergaard. 1986. Skal der lægges særlig vægt på mælk eller kød? Sortbroget Kvæg 4-86, 16-17.

 

Kristensen, A. R. & V. Østergaard. 1986. Økonomisk virkning af kombinationer af mælkeydelse, tilvækstværdi og kælvningsinterval i en etableret kvægbesætning af kombinationsrace. Beretning fra Statens Husdyrbrugsforsøg 615, 123-131.

 

Kristensen, A. R. 1986. Udskift koen nederst på hitlisten. Landsbladet no. 13, pp 29-30.

 

1985:

Kristensen, A. R. 1985. Optimering af malkekoens udskiftning. Ph.D. thesis. Department of Mathematics and Statistics. Royal Veterinary and Agricultural University. 173 pp.

 

1982:

Kristensen, A. R. 1982. Indflydelse af ustabilitet i malkearbejdet på laktationskurvens niveau og hældning. Internal report. 12 pp.

 

Kristensen, A. R. 1982. Det mest fordelagtige udskiftningstidspunkt for malkekoen. Tolvmandsbladet no. 12, pp 589-595.

 

Kristensen, A. R. & V. Østergaard. 1982. Optimalt udskiftningstidspunkt for malkekoen fastlagt ved en stokastisk model. Beretning fra Statens Husdyrbrugsforsøg 533. 146 pp.

 

Kristensen, A. R. 1982. En model for udskiftning af malkekøer. Unpublished student's thesis. Department of Mathematics and Statistics. Royal Veterinary and Agricultural University. 88 pp.