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The relationship between gait and automated recordings of individual broiler activity levels

Malou van der Sluis, Esther D. Ellen, Britt de Klerk, T. Bas Rodenburg, Yvette de Haas
2021 Poultry Science  
INTRODUCTION Broiler chickens are often kept in large groups, of several thousands of birds (de Jong et al., 2015) .  ... 
doi:10.1016/j.psj.2021.101300 pmid:34280651 pmcid:PMC8318892 fatcat:pxolns6gs5eajijbfdreutsxk4

Therapeutic Liposomal Vaccines for Dendritic Cell Activation or Tolerance

Noémi Anna Nagy, Aram M. de Haas, Teunis B. H. Geijtenbeek, Ronald van Ree, Sander W. Tas, Yvette van Kooyk, Esther C. de Jong
2021 Frontiers in Immunology  
Therefore, although moDCs lack clear de novo anti-tumor activity, they are also important to consider in anti-tumor therapies.  ... 
doi:10.3389/fimmu.2021.674048 pmid:34054859 pmcid:PMC8155586 fatcat:ona4hi5dwvdp3al3vb2lsyxmka

Validation of an Ultra-Wideband Tracking System for Recording Individual Levels of Activity in Broilers

Malou van der Sluis, Britt de Klerk, Esther D. Ellen, Yvette de Haas, Thijme Hijink, T. Bas Rodenburg
2019 Animals  
Individual data on activity of broilers is valuable, as activity may serve as a proxy for multiple health, welfare and performance indicators. However, broilers are often kept in large groups, which makes it difficult to identify and monitor them individually. Sensor technologies might offer solutions. Here, an ultra-wideband (UWB) tracking system was implemented with the goal of validating this system for individual tracking of activity of group-housed broilers. The implemented approaches were
more » ... (1) a comparison of distances moved as recorded by the UWB system and on video and (2) a study recording individual levels of activity of broilers and assessing group-level trends in activity over time; that could be compared to activity trends from literature. There was a moderately strong positive correlation between the UWB system and video tracking. Using the UWB system, we detected reductions in activity over time and we found that lightweight birds were on average more active than heavier birds. Both findings match with reports in literature. Overall, the UWB system appears well-suited for activity monitoring in broilers, when the settings are kept the same for all individuals. The longitudinal information on differences in activity can potentially be used as proxy for health, welfare and performance; but further research into individual patterns in activity is required.
doi:10.3390/ani9080580 pmid:31434210 pmcid:PMC6720957 fatcat:35horoenona7zcslqn6kto472u

Quantitative Phosphoproteomic Analysis Reveals Dendritic Cell- Specific STAT Signaling After α2-3-Linked Sialic Acid Ligand Binding

Rui-Jún Eveline Li, Aram de Haas, Ernesto Rodríguez, Hakan Kalay, Anouk Zaal, Connie R Jimenez, Sander R Piersma, Thang V Pham, Alex A Henneman, Richard R de Goeij-de Haas, Sandra J van Vliet, Yvette van Kooyk
2021 Frontiers in Immunology  
Flow cytometric quantification indeed revealed de- phosphorylation over time upon stimulation with α2-3sia, but no α2-6sia.  ...  The data above de red dotted line represent all the significantly altered phosphoproteins in three donors.  ...  The data above de red dotted line represent all the significantly altered phosphoproteins in three donors.  ... 
doi:10.3389/fimmu.2021.673454 pmid:33968084 pmcid:PMC8100677 fatcat:am4uem3w5resfpakcaon5fcsl4

Assessing the Activity of Individual Group-Housed Broilers Throughout Life using a Passive Radio Frequency Identification System—A Validation Study

Malou van der Sluis, Yvette de Haas, Britt de Klerk, T. Bas Rodenburg, Esther D. Ellen
2020 Sensors  
Individual data are valuable for assessing the health, welfare and performance of broilers. In particular, data on the first few days of life are needed to study the predictive value of traits recorded early in life for later life performance. However, broilers are generally kept in groups, which hampers individual identification and monitoring of animals. Sensor technologies may aid in identifying and monitoring individual animals. In this study, a passive radio frequency identification (RFID)
more » ... system was implemented to record broiler activity, in combination with traditional video recordings. The two main objectives were 1) to validate the output of the RFID system by comparing it to the recorded locations on video, and 2) to assess whether the number of antennas visited per unit time could serve as a measure of activity, by comparing it to the distance recorded on video and to the distance moved as recorded using a validated ultra-wideband (UWB) tracking system. The locations recorded by the RFID system exactly matched the video in 62.5% of the cases, and in 99.2% of the cases when allowing for a deviation of one antenna grid cell. There were moderately strong Spearman rank correlations between the distance recorded with the RFID system and the distance recorded from video (rs = 0.82) and between UWB and RFID (rs = 0.70) in approximately one-hour recordings, indicating that the RFID system can adequately track relative individual broiler activity, i.e., the activity level of a broiler in comparison to its group members. As the RFID tags are small and lightweight, the RFID system is well suited for monitoring the individual activity of group-housed broilers throughout life.
doi:10.3390/s20133612 pmid:32604998 pmcid:PMC7374484 fatcat:tvj7trzshnhv7ir5rjgm4at5di

A data-driven prediction of lifetime resilience of dairy cows using commercial sensor data collected during first lactation

Wijbrand Ouweltjes, Mirjam Spoelstra, Bart Ducro, Yvette de Haas, Claudia Kamphuis
2021 Journal of Dairy Science  
Reliable prediction of lifetime resilience early in life can contribute to improved management decisions of dairy farmers. Several studies have shown that time series sensor data can be used to predict lifetime resilience rankings. However, such predictions generally require the translation of sensor data into biologically meaningful sensor features, which involve proper feature definitions and a lot of preprocessing. The objective of this study was to investigate the hypothesis that
more » ... random forest algorithms can equal or improve the prediction of lifetime resilience scores compared with ordinal logistic regression, and that these algorithms require considerably less effort for data preprocessing. We studied this by developing prediction models that forecast lifetime resilience of a cow early in her productive life using sensor data from the first lactation. We used an existing data set from a Dutch experimental herd, with data of culled cows for which birth dates, insemination dates, calving dates, culling dates, and health treatments were available to calculate lifetime resilience scores. Moreover, 4 types of first-lactation sensor data, converted to daily aggregated values, were available: milk yield, body weight, activity, and rumination. For each sensor, 14 sensor features were calculated, of which part were based on absolute daily values and part on relative to herd average values. First, we predicted lifetime resilience rank with stepwise logistic regression using sensor features as predictors and a P-value of <0.2 as the cut-off. Next, we applied a random forest with the 6 features that remained in the final logistic regression model. We then applied a random forest with all sensor features, and finally applied a random forest with daily aggregated values as features. All models were validated with stratified 10-fold cross-validation with 90% of the records in the training set and 10% in the validation set. Model performances expressed in percentage of correctly classified cows (accuracy) and percentage of cows being critically misclassified (i.e., high as low and vice versa) ± standard deviation were 45.1 ± 8.1% and 10.8% with the ordinal logistic regression model, 45.7 ± 8.4% and 16.0% with the random forest using the same 6 features as the logistic regression model, 48.4 ± 6.7% and 10.0% for the random forest with all sensor features, and 50.5 ± 6.3% and 8.4% for the random forest with daily sensor values. This random forest also revealed that data collected in early and late stages of first lactation seem to be of particular importance in the prediction compared with that in mid lactation. Accuracies of the models were not significantly different, but the percentage of critically misclassified cows was significantly higher for the second model than for the other models. We concluded that a data-driven random forest algorithm with daily aggregated sensor data as input can be used for the prediction of lifetime resilience classification with an overall accuracy of ~50%, and provides at least as good prediction as models with sensor features as input.
doi:10.3168/jds.2021-20413 pmid:34454764 fatcat:rby6tlhrvffvzdy6dzapcy7qgi

Lipo-Based Vaccines as an Approach to Target Dendritic Cells for Induction of T- and iNKT Cell Responses

Dorian A. Stolk, Aram de Haas, Jana Vree, Sanne Duinkerken, Joyce Lübbers, Rieneke van de Ven, Martino Ambrosini, Hakan Kalay, Sven Bruijns, Hans J. van der Vliet, Tanja D. de Gruijl, Yvette van Kooyk
2020 Frontiers in Immunology  
Data is shown as mean ± SEM n = 4, ratio paired t-test, * < 0.05. recent pre-clinical studies have shown the importance of the generation and recruitment of de novo responses that together with ICI could  ...  Copyright © 2020 Stolk, de Haas, Vree, Duinkerken, Lübbers, van de Ven, Ambrosini, Kalay, Bruijns, van der Vliet, de Gruijl and van Kooyk.  ... 
doi:10.3389/fimmu.2020.00990 pmid:32536918 pmcid:PMC7267035 fatcat:tyey7sn2qratzewjn2x6uzgep4

Adaptation of Livestock to New Diets Using Feed Components without Competition with Human Edible Protein Sources—A Review of the Possibilities and Recommendations

Marinus F. W. te Pas, Teun Veldkamp, Yvette de Haas, André Bannink, Esther D. Ellen
2021 Animals  
Livestock feed encompasses both human edible and human inedible components. Human edible feed components may become less available for livestock. Especially for proteins, this calls for action. This review focuses on using alternative protein sources in feed and protein efficiency, the expected problems, and how these problems could be solved. Breeding for higher protein efficiency leading to less use of the protein sources may be one strategy. Replacing (part of) the human edible feed
more » ... s with human inedible components may be another strategy, which could be combined with breeding for livestock that can efficiently digest novel protein feed sources. The potential use of novel protein sources is discussed. We discuss the present knowledge on novel protein sources, including the consequences for animal performance and production costs, and make recommendations for the use and optimization of novel protein sources (1) to improve our knowledge on the inclusion of human inedible protein into the diet of livestock, (2) because cooperation between animal breeders and nutritionists is needed to share knowledge and combine expertise, and (3) to investigate the effect of animal-specific digestibility of protein sources for selective breeding for each protein source and for precision feeding. Nutrigenetics and nutrigenomics will be important tools.
doi:10.3390/ani11082293 fatcat:slkcilbnrbcqtjhdgrwv6wgdue

Challenges and priorities for modelling livestock health and pathogens in the context of climate change

Şeyda Özkan, Andrea Vitali, Nicola Lacetera, Barbara Amon, André Bannink, Dave J. Bartley, Isabel Blanco-Penedo, Yvette de Haas, Isabelle Dufrasne, John Elliott, Vera Eory, Naomi J. Fox (+22 others)
2016 Environmental Research  
Climate change has the potential to impair livestock health, with consequences for animal welfare, productivity, greenhouse gas emissions, and human livelihoods and health. Modelling has an important role in assessing the impacts of climate change on livestock systems and the efficacy of potential adaptation strategies, to support decision making for more efficient, resilient and sustainable production. However, a coherent set of challenges and research priorities for modelling livestock health
more » ... and pathogens under climate change has not previously been available. To identify such challenges and priorities, researchers from across Europe were engaged in a horizon-scanning study, involving workshop and questionnaire based exercises and focussed literature reviews. Eighteen key challenges were identified and grouped into six categories based on subject-specific and capacity building requirements. Across a number of challenges, the need for inventories relating model types to different applications (e.g. the pathogen species, region, scale of focus and purpose to which they can be applied) was identified, in order to identify gaps in capability in relation to the impacts of climate change on animal health. The need for collaboration and learning across disciplines was highlighted in several challenges, e.g. to better understand and model complex ecological interactions between pathogens, vectors, wildlife hosts and livestock in the context of climate change. Collaboration between socio-economic and biophysical disciplines was seen as important for better engagement with stakeholders and for improved modelling of the costs and benefits of poor livestock health. The need for more comprehensive validation of empirical relationships, for harmonising terminology and measurements, and for building capacity for under-researched nations, systems and health problems indicated the importance of joined up approaches across nations. The challenges and priorities identified can help focus the development of modelling capacity and future research structures in this vital field. Well-funded networks capable of managing the longterm development of shared resources are required in order to create a cohesive modelling community equipped to tackle the complex challenges of climate change. version is made available under the CC-BY-NC-ND 4.0 license: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license: Wreford, A., et al., 2015. Estimating the costs and benefits of adapting agriculture to climate change. EuroChoices
doi:10.1016/j.envres.2016.07.033 pmid:27475053 fatcat:zg4ns2h7wratpn75v2b3ihboji

Open Archive TOULOUSE Archive Ouverte (OATAO) Developing a French FrameNet: Methodology and First results

Marie Candito, Amsili, Pascal And Barque, Lucie, Benamara Zitoune, Farah, De Chalendar, Gaël, Djemaa, Marianne, Haas, Pauline (+21 others)
2014 unpublished
They used synonym dictionaries (in particular the DES 8 ) to obtain additional candidates.  ...  In case of a remodeled frame, the entries of close English frames were used as starting point to validation. 8  ... 

Page 41 of Florida Bar Journal Vol. 65, Issue 9 [page]

1991 Florida Bar Journal  

Page 1256 of The Journal of Chemical Physics Vol. 18, Issue 9 [page]

1950 The Journal of Chemical Physics  
It has also been measured by De Haas, Schultz, and Koolhaas‘ who found some deviation from this law.  ...  Tsai, Comptes Rendus 209, 205 (1939). 4 De Haas, Schultz, and Koolhaas, Physica VII, No. 1, 57 (1940). Samples of C.P. MnF; and C.P.  ... 

Page 120 of Chemistry and Chemical Industry Vol. 37, Issue 5 [page]

1984 Chemistry and Chemical Industry  
/C.N.R.S., Gif-sur- Yvette), J. M.Lehn(Collége de France, Paris), J. Martinez(C. N.R.S./I. N.S.E.R.M., Mont- pellier), M.Vincent(Lab. Ser- vier, Neuilly/Seine), G. Werner (Rhone-Poulenc, Paris), A.  ...  FRFAFACHAOR (APRN CMB PS (444 HAAS SER ATR EH SPF «ACI = SCR «(056 4) 54-1111 Af 343) B4HALERRSESH mia ARE 9 A16H~19H 243 277-22 Sophia-Antipolis, Valbonne (= — ATM).  ... 

Conference Participants

1997 Radiocarbon: An International Journal of Cosmogenic Isotope Research  
Faibles Radioactivites Domain CNRS F-91198 Gif sur Yvette Cedex, France Tel: +33 1 69 82 3525; Fax: +33 1 69 82 3568 E-mail: Marc Fournier IPSN/LMRE Bat. 501, Bois des Rames  ...  Faibles Radioactivites Avenue de la Terrasse F-91198 Gif sur Yvette Cedex, France Tel: +33 1 69 823513; Fax: +33 1 69 82 3568 E-mail: Mathias Lange 14C-Labor Institut  ... 
doi:10.1017/s003382220001780x fatcat:4varb5x3jjekxjloy3dzx3g5bi


1992 Radiocarbon: An International Journal of Cosmogenic Isotope Research  
Orsay Cedex, France Michel Fontugne Centre des Faibles Radioactivites Laboratoire mixte CNRS-CEA Avenue de la Terrasse F-91198 Gif-sur-Yvette Cedex, France Mark Fournier ORSTOM 72 Route d'Aulnay  ...  Garcia-Martinez Laboratori de Radiocarboni Departament de Quimica Analitica Universitat de Barcelona Diagonal 647 E-08028 Barcelona, Spain Mebus A.  ... 
doi:10.1017/s0033822200063426 fatcat:trsb7qrzyjasjlgw6izpngh27e
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