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Sensors and Clinical Mastitis—The Quest for the Perfect Alert

Henk Hogeveen, Claudia Kamphuis, Wilma Steeneveld, Herman Mollenhorst
2010 Sensors  
., 2009 [24] 1 for training 1 for testing -- Clinical mastitis as clots on filter (23 in test set) EC Threshold 4d/2d 83 99.8 Mollenhorst et al., 2010 [8] 3 commercial farms Based  ... 
doi:10.3390/s100907991 pmid:22163637 pmcid:PMC3231225 fatcat:ften753jcfadhnf2sbytxugmru

Predicting Nitrogen Excretion of Dairy Cattle with Machine Learning [chapter]

Herman Mollenhorst, Yamine Bouzembrak, Michel de Haan, Hans J. P. Marvin, Roel F. Veerkamp, Claudia Kamphuis
2020 IFIP Advances in Information and Communication Technology  
Article 25fa states that the author of a short scientific work funded either wholly or partially by Dutch public funds is entitled to make that work publicly available for no consideration following a reasonable period of time after the work was first published, provided that clear reference is made to the source of the first publication of the work. This publication is distributed under The Association of Universities in the Netherlands (VSNU) 'Article 25fa implementation' project. In this
more » ... ect research outputs of researchers employed by Dutch Universities that comply with the legal requirements of Article 25fa of the Dutch Copyright Act are distributed online and free of cost or other barriers in institutional repositories. Research outputs are distributed six months after their first online publication in the original published version and with proper attribution to the source of the original publication.
doi:10.1007/978-3-030-39815-6_13 fatcat:72akk7cxb5gr7dbfgvzon6szhm

Boosted trees to predict pneumonia, growth and meat percentage of growing-finishing pigs

Herman Mollenhorst, Bart J Ducro, Karel H de Greef, Ina Hulsegge, Claudia Kamphuis
2019 Journal of Animal Science  
In pig production, efficiency is benefiting from uniform growth in pens resulting in single deliveries from a pen of possibly all animals in the targeted weight range. Abnormalities, like pneumonia or aberrant growth, reduce production efficiency as it reduces the uniformity and might cause multiple deliveries per batch and pigs delivered with a low meat yield or outside the targeted weight range. Early identification of pigs prone to develop these abnormalities, e.g. at the onset of the
more » ... -finishing phase, would help to prevent heterogeneous pens through management interventions. Data about previous production cycles at the farm combined with data from the piglet's own history may help in identifying these abnormalities. The aim of this study, therefore, was to predict at the onset of the growing-finishing phase, i.e. at three months in advance, deviant pigs at slaughter with a machine learning technique called boosted trees. The dataset used was extracted from the farm management system of a research center. It contained over 70 thousand records of individual pigs born between 2004 and 2016, including information on, e.g., offspring, litter size, transfer dates between production stages, their respective locations within the barns, and individual live-weights at several production stages. Results obtained on an independent test set showed that at a 90% specificity rate, the sensitivity was 16% for low meat percentage, 20% for pneumonia and 36% for low lifetime growth rate. For low lifetime growth rate this meant an almost three times increase in positive predictive value compared to the current situation. From these results it was concluded that routine performance information available at the onset of the growing-finishing phase combined with data about previous production cycles formed a moderate base to identify pigs prone to develop pneumonia (AUC > 0.60) and a good base to identify pigs prone to develop growth aberrations (AUC > 0.70) during the growing-finishing phase. The mentioned information, however, was not a sufficient base to identify pigs prone to develop low meat percentage (AUC < 0.60). The shown ability to identify growth aberrations and pneumonia can be considered a good first step towards the development of an early warning system for pigs in the growing-finishing phase.
doi:10.1093/jas/skz274 pmid:31504579 pmcid:PMC6776275 fatcat:5olw5lhh25fjxhs6632x4yoaoq

Global food supply: land use efficiency of livestock systems

Hannah H. E. van Zanten, Herman Mollenhorst, Cindy W. Klootwijk, Corina E. van Middelaar, Imke J. M. de Boer
2015 The International Journal of Life Cycle Assessment  
Purpose Livestock already use most global agricultural land, whereas the demand for animal-source food (ASF) is expected to increase. To address the contribution of livestock to global food supply, we need a measure for land use efficiency of livestock systems. Methods Existing measures capture different aspects of the debate about land use efficiency of livestock systems, such as plant productivity and the efficiency of converting feed, especially human-inedible feed, into animal products. So
more » ... ar, the suitability of land for cultivation of food crops has not been accounted for. Our land use ratio (LUR) includes all above-mentioned aspects and yields a realistic insight into land use efficiency of livestock systems. LUR is defined as the maximum amount of human-digestible protein (HDP) derived from food crops on all land used to cultivate feed required to produce 1 kg ASF over the amount of HDP in that 1 kg ASF. We illustrated our concept for three case systems. Results and discussion The LUR for the case of laying hens equaled 2.08, implying that land required to produce 1 kg HDP from laying hens could directly yield 2.08 kg HDP from human food crops. For dairy cows, the LUR was 2.10 when kept on sandy soils and 0.67 when kept on peat soils. The LUR for dairy cows on peat soils was lower compared to cows on sandy soils because land used to grow grass and grass silage for cows on peats was unsuitable for direct production of food crops. A LUR <1.0 is considered efficient in terms of global food supply and implies that animals produce more HDP per square metre than crops. Conclusions Values <1.0 demonstrate that livestock produce HDP more efficiently than crops. Such livestock systems (with a LUR<1.0), therefore, do have a role in future food supply and therefore contribute to food security. Our LUR offers identification of livestock production systems that contribute to global food supply, i.e. systems that value land with low opportunity costs for arable production and/or byproducts from crop cultivation or the food or energy industry.
doi:10.1007/s11367-015-0944-1 fatcat:vke366ianndvbnjab5hopwaosu

Field and crop specific manure application on a dairy farm based on historical data and machine learning

Herman Mollenhorst, Michel H.A. de Haan, Jouke Oenema, Claudia Kamphuis
2020 Computers and Electronics in Agriculture  
Herman Mollenhorst: Conceptualization, Methodology, Formal analysis, Data curation, Writing -original draft. Michel H.A. Haan: Investigation, Writing -review & editing.  ...  Mollenhorst, et al.  ...  Appendix Appendix to COMPAG_2019_250 (Mollenhorst et al., Field and crop specific manure application on a dairy farm based on historical data and machine learning) Appendix A.  ... 
doi:10.1016/j.compag.2020.105599 fatcat:wzbuskioiffmbjsmalm5lb7d6m

Assessing environmental consequences of using co-products in animal feed

Hannah H. E. van Zanten, Herman Mollenhorst, Jerke W. de Vries, Corina E. van Middelaar, Heleen R. J. van Kernebeek, Imke J. M. de Boer
2013 The International Journal of Life Cycle Assessment  
Purpose: The livestock sector has a major impact on the environment. This environmental impact may be reduced by feeding agricultural co-products (e.g. beet tails) to livestock, as this transforms inedible products for humans into edible products, e.g. pork or beef. Nevertheless, co-products have different applications such as bio-energy production. Based on a framework we developed, we assessed environmental consequences of using co-products in diets of livestock, including the alternative
more » ... ication of that co-product. Method: We performed a consequential life cycle assessment, regarding greenhouse gas emissions (including emissions related to land use change) and land use, for two case studies. Case 1: Increasing the use of wheat middlings in diets of dairy cattle at the expense of using it in diets of pigs. The decreased use of wheat middlings in diets of pigs was substituted with barley, the marginal product. Case 2: Increasing the use of beet tails in diets of dairy cattle at the expense of using it to produce bio-energy. During the production of biogas, electricity, heat, and digestate (that is used as organic fertiliser) were produced. The decrease of electricity and heat was substituted with fossil fuel, and digestate was substituted with artificial fertiliser. Results and discussion: Using wheat middlings in diets of dairy cattle instead of using it in diets of pigs resulted in a reduction of 329 kg CO2-eq per ton wheat middlings and a decrease of 169 m 2 land. Using beet tails in diets of dairy cattle instead of using it as a substrate for anaerobic digestion resulted in a decrease of 239 kg CO2-eq per ton beet tails and a decrease of 154 m 2 land. Emissions regarding land use change contributed significantly in both cases but had a high uncertainty factor, ±170 ton CO2 ha -1 . Excluding emissions 2 from land use change resulted in a decrease of 9 kg CO2 for case 1 'wheat middlings' and an increase of 50 kg CO2-eq for case 2 'beet tails'. Conclusion: Assessing the use of co-products in the livestock sector is of importance because shifting its application, can reduce the environmental impact of the livestock sector. A correct assessment of the environmental consequences of using co-products in animal feed should also include potential changes in impacts outside the livestock sector, such as the impact in the bio-energy sector.
doi:10.1007/s11367-013-0633-x fatcat:mjsy23h6xbgpzoycvn7hb4soi4

Welfare, Health, and Hygiene of Laying Hens Housed in Furnished Cages and in Alternative Housing Systems

T. Bas Rodenburg, Frank A.M. Tuyttens, Bart Sonck, Koen De Reu, Lieve Herman, Johan Zoons
2005 Journal of Applied Animal Welfare Science  
Deep litter systems had a higher score, indicating better welfare, than did conventional cages (Mollenhorst et al., 2005) .  ...  De Reu, Grijspeerdt, Heyndrickx, Uttendaele, and Herman (2005) analyzed the critical control points in different egg production chains of consumption eggs and reported that the most critical point for  ... 
doi:10.1207/s15327604jaws0803_5 pmid:16468949 fatcat:qnrowbvx5fextm3kriq5ouaxfm

Requiem. Resonanzen katholischer Totenliturgie in Vergangenheit und Gegenwart

Thomas Quartier
2019 Yearbook for Ritual and Liturgical Studies  
Damit wird die Perspektive des Einzelnen automatisch erweitert, wie Hoondert & Bruin-Mollenhorst sagen: "Die Erfahrung der Identität ist keine isolierte Realität, die sich auf das Individuum beschränken  ...  Eric Venbrux u.a. (= Death Studies 1) (Münster, LIT, 2012), 191-221, 202. 6) Martin Hoondert & Janieke Bruin-Mollenhorst, "Music as a Lens to Study Death Rituals," Jaarboek voor liturgieonderzoek 32 (2016  ... 
doi:10.21827/5bfeaac93d24c fatcat:fxpsigjazjf7zow5ahxrre25hy

The dynamics ofSalmonellaoccurrence in commercial laying hen flocks throughout a laying period

J. Schulz, S. Van Hoorebeke, B. Hald, J. Hartung, F. Van Immerseel, I. Radtke, S. Kabell, J. Dewulf
2011 Avian Pathology  
., 2004; Mollenhorst, 2005; Humphrey, 2006; Carrique-Mas et al., 2008; Namata et al., 2008; Van Hoorebeke et al., 2010) (Wales et al., 2007) .  ...  De Reu, K., Messens, W., Heyndrickx, M., Rodenburg, T.B., Uyttendaele, M. & Herman, L. (2008). Bacterial contamination of table eggs and the influence of housing system.  ... 
doi:10.1080/03079457.2010.544290 pmid:21711183 fatcat:dlrrrydquvfgfmqtksdycwcaum

Introduction to Special Issue: Exploring Ritual Fields Today

Martin Hoondert, Paul Post
2021 Religions  
, Paul Post, and Herman Beck).  ...  diversity, absent rituals, and, in particular, ritual music, such as music in cremations and the popularity of passions and requiems (researchers include Martin Hoondert, Albertina Nugteren, Janieke Bruin-Mollenhorst  ... 
doi:10.3390/rel12030210 fatcat:meyxjfypkbcr3joawasmkuxxje

Ongelijkheid in Nederland

Gwen van Eijk, Tim Reeskens, Saskia Keuzenkamp
2015 Sociologie  
Jaap Dronkers bespreekt het boek Een kloof van alle tijden dat onder redactie van Herman van de Werfhorst (2015) is geschreven.  ...  Het artikel van Beate Volker, Henk Flap en Gerald Mollenhorst gaat in op de vragen hoe deze ongelijke verdeling van sociale netwerken eruitziet, in hoeverre dat een oorzaak is van andere ongelijkheden,  ... 
doi:10.5117/sociologie/157433142015011003001 fatcat:hb5v2mmdb5a7fijy5jwnix6pci

Multidisciplinary Approaches and Assessment Techniques to Better Understand and Enhance Zoo Nonhuman Animal Welfare

Janice M. Siegford
2013 Journal of Applied Animal Welfare Science  
Dolphins are also able to use arbitrary symbols in cognitive tasks to indicate whether objects are present or absent (Herman & Forestell, 1985) .  ...  ASSESSING WELFARE OF NONHUMAN ANIMALS IN ZOOS Practical approaches to assessing welfare often include both animal-and resourcebased measures (Blokhuis, 2008; Mollenhorst, Rodenburg, Bokkers, Koene, &  ... 
doi:10.1080/10888705.2013.827914 pmid:24079486 fatcat:hc7a33v6crhmhhw3pwvj735vzy

Verschil in Nederland [article]

Cok Vrooman, Mérove Gijsberts, Jeroen Boelhouwer, University, My
Mollenhorst et al. 2008) .  ...  Hermans relativeert dit.  ... 
doi:10.48592/578 fatcat:2wh2suwcnbgjpctxelsfn66bfm

Demographischer Wandel und räumliche Planung in den Niederlanden [article]

Frank Swiaczny, Universitäts- Und Landesbibliothek Sachsen-Anhalt, Martin-Luther Universität, Klaus Friedrich, Daniel Göler
HERMANS 2016: 104-114; REVERDA et al. 2018).  ...  die Einwohner die (agrarische) Produktionsfunktion im Vordergrund (VAN DER ZIEL/STEENBEKKERS 2006 40, 46). 57 Im Gegensatz zur verbreiteten Einschätzung der Experten zeigen die SCP-Erhebungen (VERMEIJ/MOLLENHORST  ... 
doi:10.25673/36027 fatcat:75hokwf6sbdptidn6quahmiwpa

Using precision livestock farming (PLF) technologies to assess the impact of environmental stressors on animal welfare and production efficiency on modern dairy farms

Boyu Ji, Thomas Banhazi, Afshin Ghahramani, Les Bowtell
., 2000; Hermans et al., 2003; Speroni et al., 2003; Svennersten-Sjaunja et al., 2000; Rodenburg and Wheeler, 2002) .  ...  DMY) had different values from different studies (Penry et al., 2018; Hogeveen et al., 2001; Mollenhorst et al., 2011) .  ... 
doi:10.26192/5f716d2499a0b fatcat:ks5nx4b6tvhybpmxeutmigukvy
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