Living a sedentary lifestyle is one of the major causes of numerous health problems. To encourage employees to lead a less sedentary life, the Hanze University started a health promotion program. One of the interventions in the program was the use of an activity tracker to record participants' daily step count. The daily step count served as input for a fortnightly coaching session. In this paper, we investigate the possibility of automating part of the coaching procedure on physical activity by providing personalized feedback throughout the day on a participant's progress in achieving a personal step goal. The gathered step count data was used to train eight different machine learning algorithms to make hourly estimations of the probability of achieving a personalized, daily steps threshold. In 80% of the individual cases, the Random Forest algorithm was the best performing algorithm (mean accuracy = 0.93, range = 0.88–0.99, and mean F1-score = 0.90, range = 0.87–0.94). To demonstrate the practical usefulness of these models, we developed a proof-of-concept Web application that provides personalized feedback about whether a participant is expected to reach his or her daily threshold. We argue that the use of machine learning could become an invaluable asset in the process of automated personalized coaching. The individualized algorithms allow for predicting physical activity during the day and provides the possibility to intervene in time.
The current set of research methods on ictresearchmethods.nl contains only one research method that refers to machine learning: the “Data analytics” method in the “Lab” strategy. This does not reflect the way of working in ML projects, where Data Analytics is not a method to answer one question but the main goal of the project. For ML projects, the Data Analytics method should be divided in several smaller steps, each becoming a method of its own. In other words, we should treat the Data Analytics (or more appropriate ML engineering) process in the same way the software engineering process is treated in the framework. In the remainder of this post I will briefly discuss each of the existing research methods and how they apply to ML projects. The methods are organized by strategy. In the discussion I will give pointers to relevant tools or literature for ML projects.
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Machine learning models have proven to be reliable methods in classification tasks. However, little research has been done on classifying dwelling characteristics based on smart meter & weather data before. Gaining insights into dwelling characteristics can be helpful to create/improve the policies for creating new dwellings at NZEB standard. This paper compares the different machine learning algorithms and the methods used to correctly implement the models. These methods include the data pre-processing, model validation and evaluation. Smart meter data was provided by Groene Mient, which was used to train several machine learning algorithms. The models that were generated by the algorithms were compared on their performance. The results showed that Recurrent Neural Network (RNN) 2performed the best with 96% of accuracy. Cross Validation was used to validate the models, where 80% of the data was used for training purposes and 20% was used for testing purposes. Evaluation metrices were used to produce classification reports, which can indicate which of the models work the best for this specific problem. The models were programmed in Python.
In het ziekenhuis kan elke fout een leven kosten. Zo kan al een kleine bereidingsfout bij het klaarmaken van intraveneuze medicijnen (IV) leiden tot levensbedreigende omstandigheden voor de patiënt. Bereiding van dit type medicijnen gebeurt in de apotheek en op de verpleegafdeling. Met name op de verpleegafdeling is het een drukke en onvoorspelbare setting. Wereldwijd komen in deze setting ernstige bereidingsfouten nog te frequent voor. Om deze menselijke fouten te reduceren, wordt in deze KIEM aanvraag een proof-of-concept ‘slim oog’ ontwikkeld die vlak voor de toediening detecteert of de juiste dosis aanwezig is, of het type medicijn correct is en geen vervuiling aanwezig is. Het slimme oog maakt gebruik van hyperspectrale technologie en artificial intelligence, en is een samenwerking tussen de Computer Vision & Data Science afdeling van NHL Stenden Hogeschool, de automatische medicijncontrole specialist ZiuZ, en het Tjongerschans ziekenhuis. De unieke combinatie tussen nieuwe AI-technieken, hyperspectrale techniek en de toepassing op intraveneuze medicijnen is voor dit consortium technisch nieuw, en is nog niet eerder ontwikkeld voor de toepassing aan het bed of in de medicijnkamer op de verpleegafdeling. De onvoorspelbare setting en de urgentie aan het bed maakt dit onderzoek technisch uitdagend. Tevens moet het uiteindelijke device klein en draagbaar en snel werkzaam zijn. Om de grote verscheidenheid aan mogelijke gebruik scenario's en menselijke fouten te vangen in het algoritme, wordt een door NHLS ontwikkelde simulatie procedure gevolgd: met nabootsing van de praktijksituatie in samenwerking met zorgverleners, met opzettelijke fouten, en computer gegenereerde beeldmanipulatie. Het project zal geïntegreerd worden in het onderwijs volgens de design-based methode, met teams bestaande uit domein experts, bedrijven, docent-onderzoekers en studenten. Het uiteindelijke doel is om met een proof-of-concept aan-het-bed demonstrator een groot consortium van ziekenhuizen, ontwikkelaars en eindgebruikers enthousiast te maken voor een groter vervolgproject.
The postdoc candidate, Sondos Saad, will strengthen connections between research groups Asset Management(AM), Data Science(DS) and Civil Engineering bachelor programme(CE) of HZ. The proposed research aims at deepening the knowledge about the complex multidisciplinary performance deterioration prediction of turbomachinery to optimize cleaning costs, decrease failure risk and promote the efficient use of water &energy resources. It targets the key challenges faced by industries, oil &gas refineries, utility companies in the adoption of circular maintenance. The study of AM is already part of CE curriculum, but the ambition of this postdoc is that also AM principles are applied and visible. Therefore, from the first year of the programme, the postdoc will develop an AM material science line and will facilitate applied research experiences for students, in collaboration with engineering companies, operation &maintenance contractors and governmental bodies. Consequently, a new generation of efficient sustainability sensitive civil engineers could be trained, as the labour market requires. The subject is broad and relevant for the future of our built environment being more sustainable with less CO2 footprint, with possible connections with other fields of study, such as Engineering, Economics &Chemistry. The project is also strongly contributing to the goals of the National Science Agenda(NWA), in themes of “Circulaire economie en grondstoffenefficiëntie”,”Meten en detecteren: altijd, alles en overall” &”Smart Industry”. The final products will be a framework for data-driven AM to determine and quantify key parameters of degradation in performance for predictive AM strategies, for the application as a diagnostic decision-support toolbox for optimizing cleaning &maintenance; a portfolio of applications &examples; and a new continuous learning line about AM within CE curriculum. The postdoc will be mentored and supervised by the Lector of AM research group and by the study programme coordinator(SPC). The personnel policy and job function series of HZ facilitates the development opportunity.
