Background: Modern modeling techniques may potentially provide more accurate predictions of dichotomous outcomes than classical techniques. Objective: In this study, we aimed to examine the predictive performance of eight modeling techniques to predict mortality by frailty. Methods: We performed a longitudinal study with a 7-year follow-up. The sample consisted of 479 Dutch community-dwelling people, aged 75 years and older. Frailty was assessed with the Tilburg Frailty Indicator (TFI), a self-report questionnaire. This questionnaire consists of eight physical, four psychological, and three social frailty components. The municipality of Roosendaal, a city in the Netherlands, provided the mortality dates. We compared modeling techniques, such as support vector machine (SVM), neural network (NN), random forest, and least absolute shrinkage and selection operator, as well as classical techniques, such as logistic regression, two Bayesian networks, and recursive partitioning (RP). The area under the receiver operating characteristic curve (AUROC) indicated the performance of the models. The models were validated using bootstrapping. Results: We found that the NN model had the best validated performance (AUROC=0.812), followed by the SVM model (AUROC=0.705). The other models had validated AUROC values below 0.700. The RP model had the lowest validated AUROC (0.605). The NN model had the highest optimism (0.156). The predictor variable “difficulty in walking” was important for all models. Conclusions: Because of the high optimism of the NN model, we prefer the SVM model for predicting mortality among community-dwelling older people using the TFI, with the addition of “gender” and “age” variables. External validation is a necessary step before applying the prediction models in a new setting.
From the article: "After 1993, the concept of strategic alignment is evaluated from the connection between IT and business to much broader definitions in which the connection between all business functions, horizontally and vertically, and later also with projects and stakeholders is mentioned. To achieve stategic alignment there must be a coordination between the strategy of organizations and those who contribute to the implementation of the strategy and the actual performance of an organization. This process is called Human Oriented Performance Management (HOPM). The HOPM model consists of four dimensions: strategy translation, information and visualization, dialogue and action orientation, and continues improvement and organizational learning. To measure the effect of strategic alignment a range of financial performance indicators are used. Based on a literature review this paper explores which financial performance indicators could be used to measure the effect of HOPM. The literature was selected over a period from 1996 – 2015. The research is not only focused on the top of the strategy map, but also on the cause-effect relationships in the strategy map. The underlying performance indicators in the strategy map can show on which figures the dialogue in the HOPM model about strategy implementation must be based. This dialogue is the input to action in which strategic alignment comes about. The goal of the research is to optimize this dialogue by looking for performance indicators that can show the effect of HOPM" The article is used for the course: 'corporate policy' minor MSMM (Masterclass Strategic Marketing Management).
Dit artikel bespreekt de relatie tussen organisatiecultuur en performance management. De auteurs stellen dat gedrag niet op zichzelf staat, maar wordt gevormd door onderliggende waarden en overtuigingen. Om performance management in de praktijk succesvol te laten zijn, moet het worden opgenomen in de organisatiecultuur. Onderzoek van De Waal (2003) laat zien dat de vier gedragsaspecten; verantwoordelijkheid, managementstijl, actiegerichtheid en communicatie van belang zijn voor goed performance management. Ten slotte wordt in het artikel nader onderzoek aangekondigd naar de cultuurelementen in het Cultuur-arenamodel van Straathof (2009) die van invloed zijn op het invoeren en toepassen van performance management.
In the last decade, the automotive industry has seen significant advancements in technology (Advanced Driver Assistance Systems (ADAS) and autonomous vehicles) that presents the opportunity to improve traffic safety, efficiency, and comfort. However, the lack of drivers’ knowledge (such as risks, benefits, capabilities, limitations, and components) and confusion (i.e., multiple systems that have similar but not identical functions with different names) concerning the vehicle technology still prevails and thus, limiting the safety potential. The usual sources (such as the owner’s manual, instructions from a sales representative, online forums, and post-purchase training) do not provide adequate and sustainable knowledge to drivers concerning ADAS. Additionally, existing driving training and examinations focus mainly on unassisted driving and are practically unchanged for 30 years. Therefore, where and how drivers should obtain the necessary skills and knowledge for safely and effectively using ADAS? The proposed KIEM project AMIGO aims to create a training framework for learner drivers by combining classroom, online/virtual, and on-the-road training modules for imparting adequate knowledge and skills (such as risk assessment, handling in safety-critical and take-over transitions, and self-evaluation). AMIGO will also develop an assessment procedure to evaluate the impact of ADAS training on drivers’ skills and knowledge by defining key performance indicators (KPIs) using in-vehicle data, eye-tracking data, and subjective measures. For practical reasons, AMIGO will focus on either lane-keeping assistance (LKA) or adaptive cruise control (ACC) for framework development and testing, depending on the system availability. The insights obtained from this project will serve as a foundation for a subsequent research project, which will expand the AMIGO framework to other ADAS systems (e.g., mandatory ADAS systems in new cars from 2020 onwards) and specific driver target groups, such as the elderly and novice.
Big data spelen een steeds grotere rol in de (semi)professionele sport. De hoeveelheid gegevens die opgeslagen wordt, groeit exponentieel. Sportbegeleiders (coaches, inspanningsfysiologen, sportfysiotherapeuten en sportartsen) maken steeds vaker gebruik van sensoren om sporters te monitoren. Tijdens trainingen en wedstrijden worden de hartslagen, afgelegde afstanden, snelheden en versnellingen van sporters gemeten. Het analyseren van deze data vormt een grote uitdaging voor het begeleidingsteam van de sporters. Sportbegeleiders willen big data graag inzetten om meer grip te krijgen op sportblessures. Blessures kunnen namelijk desastreuze gevolgen hebben voor teamprestaties en de carrière van (semi)professionele sporters. In totaal stopt maar liefst 33% van de topsporters door blessures met hun sportloopbaan. Daarnaast is uitval door blessures een belangrijke oorzaak van stagnatie van talentontwikkeling. Het lectoraat Sportzorg van de Hogeschool van Amsterdam heeft veel expertise op het gebied van blessurepreventie in de sport. Sportbegeleiders hebben het lectoraat Sportzorg benaderd om antwoord te krijgen op de onderzoeksvraag: Wat zijn op data gebaseerde indicatoren om sportblessures te voorspellen? Deze onderzoeksvraagstelling is opgesplitst in de volgende deelvragen: 1. Hoe kan met sensoren relevante data van sporters verzameld worden om de sportbelasting in kaart te brengen? 2. Welke parameters kunnen blessures voorspellen? 3. Hoe kunnen deze parameters op betekenisvolle en eenvoudige wijze naar sportbegeleiders en sporters teruggekoppeld worden? Het project resulteert in de volgende projectresultaten: - Een overzicht van nauwkeurige en gebruiksvriendelijke sensoren om sportbelasting in kaart te brengen - Een overzicht van relevante parameters die blessures kunnen voorspellen - Een online tool dat per sporter aangeeft of de sporter wel of niet training- of wedstrijdfit is Bij dit project zijn de volgende organisaties betrokken: Hogeschool van Amsterdam, Universiteit Leiden, VUmc, Rijksuniversiteit Groningen (RuG), Amsterdam Institute of Sport Science (AISS), Johan Sports, Centrum voor Topsport en Onderwijs (CTO) Amsterdam, Koninklijke Nederlandse Voetbalbond (KNVB), de Nederlandse Vereniging voor Fysiotherapie in de Sport (NVFS), VV Noordwijk (voetbalclub) en Black Eagles (basketbalclub).
Human kind has a major impact on the state of life on Earth, mainly caused by habitat destruction, fragmentation and pollution related to agricultural land use and industrialization. Biodiversity is dominated by insects (~50%). Insects are vital for ecosystems through ecosystem engineering and controlling properties, such as soil formation and nutrient cycling, pollination, and in food webs as prey or controlling predator or parasite. Reducing insect diversity reduces resilience of ecosystems and increases risks of non-performance in soil fertility, pollination and pest suppression. Insects are under threat. Worldwide 41 % of insect species are in decline, 33% species threatened with extinction, and a co-occurring insect biomass loss of 2.5% per year. In Germany, insect biomass in natural areas surrounded by agriculture was reduced by 76% in 27 years. Nature inclusive agriculture and agri-environmental schemes aim to mitigate these kinds of effects. Protection measures need success indicators. Insects are excellent for biodiversity assessments, even with small landscape adaptations. Measuring insect biodiversity however is not easy. We aim to use new automated recognition techniques by machine learning with neural networks, to produce algorithms for fast and insightful insect diversity indexes. Biodiversity can be measured by indicative species (groups). We use three groups: 1) Carabid beetles (are top predators); 2) Moths (relation with host plants); 3) Flying insects (multiple functions in ecosystems, e.g. parasitism). The project wants to design user-friendly farmer/citizen science biodiversity measurements with machine learning, and use these in comparative research in 3 real life cases as proof of concept: 1) effects of agriculture on insects in hedgerows, 2) effects of different commercial crop production systems on insects, 3) effects of flower richness in crops and grassland on insects, all measured with natural reference situations
