Farmers often install automatic cow brushes to promote grooming behaviour, potentially reducing stress. Health problems in cattle are typically accompanied by a suit of sickness behaviours and a reduction of low resilience behaviours such as grooming. Thus, decreased automatic brush use could be a potential indicator of disease. Our study aimed to develop and validate an algorithm for automatic monitoring of cow brush usage in a commercial dairy farm setting. The research took place on a commercial dairy farm in the Netherlands housing 130 Holstein Friesian dairy cows fitted with a Nedap SmartTag Neck that included cow location. Visual observations of cow brush usage were performed for 38 hours, distributed across 12 days by two observers, yielding 533 visits to the brush. Cows brushing (87.4% of visits) had a median brushing time of 1:22 minutes (range 00:10-20:03). An algorithm was developed and then validated to determine the time spent at the brush based on location data. Results show good precision (89.1%), recall (87.4%), and Fl score (88.3%) for the algorithm. Time spent at the brush for observations and algorithm was strongly correlated for the true-positives (Spearman's rank-order correlation: r=0.919; p<0.001; n=466), as were time observed at the brush and brushing time (Spearman's rank-order correlation: r=0.853; p<0.001; n=533). Our algorithm had a moderate predictive value for brushing time (R2 = 0.409; p<0.001) indicating a need for further optimization. This study is the first step in validating an algorithm for automated recording of brushing time, enabling future studies relating brushing time to health and welfare.
MULTIFILE
12/31/2023
PurposeSocial enterprises have proven to play a vital role in the transitions towards inclusive labour markets and sustainable economies. Yet, they often struggle to flourish within traditional economic systems due to the dual mission of pursuing social and commercial goals, leading to inherent tensions for social entrepreneurs. This study aims to explore tensions within Work Integration Social Enterprises (WISEs) arising from their dual mission and engagement withmultiple stakeholders.MethodologyInterviews with representatives from 10 Dutch WISEs were conducted to understand their day-to-day challenges. The typology by Smith and Lewis (2011), focusing on learning, belonging, organising, and performing tensions, was used for data analysis. FindingsThe study reveals tensions between social impact and commercial viability, withorganizational challenges being predominant. Also, there's an observed temporal pattern in tension prominence: early stages emphasize belonging, organising, and performing tensions, while learning tensions become more prominent as enterprises mature. OriginalityThis study offers insights into tensions within WISEs, highlighting the complexity of managing multiple identities in a multi-stakeholder context. By drawing on practical experiences, it contributes nuanced understanding to existing literature.
This article critically reappraises a key concept in hospitality management (and specifically food and beverage management) - that of the meal experience. Focusing primarily on the commercial sense and applications of the concept, while recognising the many other contexts that provide a basis for much wider study of the phenomenon, the discussion questions the status of the meal experience as part of the 'received wisdom' of hospitality management on the grounds that empirical support for the concept, as represented in the published research literature, is limited both in quantity and evidential persuasiveness.
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12/31/2011Electrohydrodynamic Atomization (EHDA), also known as Electrospray (ES), is a technology which uses strong electric fields to manipulate liquid atomization. Among many other areas, electrospray is currently used as an important tool for biomedical applications (droplet encapsulation), water technology (thermal desalination and metal recovery) and material sciences (nanofibers and nano spheres fabrication, metal recovery, selective membranes and batteries). A complete review about the particularities of this technology and its applications was recently published in a special edition of the Journal of Aerosol Sciences [1]. Even though EHDA is already applied in many different industrial processes, there are not many controlling tools commercially available which can be used to remotely operate the system as well as identify some spray characteristics, e.g. droplet size, operational mode, droplet production ratio. The AECTion project proposes the development of an innovative controlling system based on the electrospray current, signal processing & control and artificial intelligence to build a non-visual tool to control and characterize EHDA processes.
Various companies in diagnostic testing struggle with the same “valley of death” challenge. In order to further develop their sensing application, they rely on the technological readiness of easy and reproducible read-out systems. Photonic chips can be very sensitive sensors and can be made application-specific when coated with a properly chosen bio-functionalized layer. Here the challenge lies in the optical coupling of the active components (light source and detector) to the (disposable) photonic sensor chip. For the technology to be commercially viable, the price of the disposable photonic sensor chip should be as low as possible. The coupling of light from the source to the photonic sensor chip and back to the detectors requires a positioning accuracy of less than 1 micrometer, which is a tremendous challenge. In this research proposal, we want to investigate which of the six degrees of freedom (three translational and three rotational) are the most crucial when aligning photonic sensor chips with the external active components. Knowing these degrees of freedom and their respective range we can develop and test an automated alignment tool which can realize photonic sensor chip alignment reproducibly and fully autonomously. The consortium with expertise and contributions in the value chain of photonics interfacing, system and mechanical engineering will investigate a two-step solution. This solution comprises a passive pre-alignment step (a mechanical stop determines the position), followed by an active alignment step (an algorithm moves the source to the optimal position with respect to the chip). The results will be integrated into a demonstrator that performs an automated procedure that aligns a passive photonic chip with a terminal that contains the active components. The demonstrator is successful if adequate optical coupling of the passive photonic chip with the external active components is realized fully automatically, without the need of operator intervention.
Chemical preservation is an important process that prevents foods, personal care products, woods and household products, such as paints and coatings, from undesirable change or decomposition by microbial growth. To date, many different chemical preservatives are commercially available, but they are also associated with health threats and severe negative environmental impact. The demand for novel, safe, and green chemical preservatives is growing, and this process is further accelerated by the European Green Deal. It is expected that by the year of 2050 (or even as soon as 2035), all preservatives that do not meet the ‘safe-by-design’ and ‘biodegradability’ criteria are banned from production and use. To meet these European goals, there is a large need for the development of green, circular, and bio-degradable antimicrobial compounds that can serve as alternatives for the currently available biocidals/ preservatives. Anthocyanins, derived from fruits and flowers, meet these sustainability goals. Furthermore, preliminary research at the Hanze University of Applied Science has confirmed the antimicrobial efficacy of rose and tulip anthocyanin extracts against an array of microbial species. Therefore, these molecules have the potential to serve as novel, sustainable chemical preservatives. In the current project we develop a strategy consisting of fractionation and state-of-the-art characterization methods of individual anthocyanins and subsequent in vitro screening to identify anthocyanin-molecules with potent antimicrobial efficacy for application in paints, coatings and other products. To our knowledge this is the first attempt that combines in-depth chemical characterization of individual anthocyanins in relation to their antimicrobial efficacy. Once developed, this strategy will allow us to single out anthocyanin molecules with antimicrobial properties and give us insight in structure-activity relations of individual anthocyanins. Our approach is the first step towards the development of anthocyanin molecules as novel, circular and biodegradable non-toxic plant-based preservatives.
