Learning analytics is the analysis of student data with the purpose of improving learning. However, the process of data cleaning remains underexposed within learning analytics literature. In this paper, we elaborate on choices made in the cleaning process of student data and their consequences. We illustrate this with a case where data was gathered during six courses taught via Moodle. In this data set, only 21% of the logged activities were linked to a specific course. We illustrate possible choices in dealing with missing data by applying the cleaning process twelve times with different choices on copies of the raw data. Consequently, the analysis of the data shows varying outcomes. As the purpose of learning analytics is to intervene based on analysis and visualizations, it is of utmost importance to be aware of choices made during data cleaning. This paper's main goal is to make stakeholders of (learning) analytics activities aware of the fact that choices are made during data cleaning have consequences on the outcomes. We believe that there should be transparency to the users of these outcomes and give them a detailed report of the decisions made.
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The Technical Manual for the digital evaluation tool QualiTePE supports users of the QualiTePE tool in creating, conducting and analysing evaluations to record the quality of teaching in physical education. The information on the General Data Protection Regulation (GDPR) instructs users on how to anonymise the data collection of evaluations and which legal bases apply with regard to the collection of personal data. The technical manual for the digital evaluation tool QualiTePE and the information on the General Data Protection Regulation (GDPR) are available in English, German, French, Italian, Spanish, Dutch, Swedish, Slovenian, Czech and Greek.
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Analyzing historical decision-related data can help support actual operational decision-making processes. Decision mining can be employed for such analysis. This paper proposes the Decision Discovery Framework (DDF) designed to develop, adapt, or select a decision discovery algorithm by outlining specific guidelines for input data usage, classifier handling, and decision model representation. This framework incorporates the use of Decision Model and Notation (DMN) for enhanced comprehensibility and normalization to simplify decision tables. The framework’s efficacy was tested by adapting the C4.5 algorithm to the DM45 algorithm. The proposed adaptations include (1) the utilization of a decision log, (2) ensure an unpruned decision tree, (3) the generation DMN, and (4) normalize decision table. Future research can focus on supporting on practitioners in modeling decisions, ensuring their decision-making is compliant, and suggesting improvements to the modeled decisions. Another future research direction is to explore the ability to process unstructured data as input for the discovery of decisions.
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Patiëntdata uit vragenlijsten, fysieke testen en ‘wearables’ hebben veel potentie om fysiotherapie-behandelingen te personaliseren (zogeheten ‘datagedragen’ zorg) en gedeelde besluitvorming tussen fysiotherapeut en patiënt te faciliteren. Hiermee kan fysiotherapie mogelijk doelmatiger en effectiever worden. Veel fysiotherapeuten en hun patiënten zien echter nauwelijks meerwaarde in het verzamelen van patiëntdata, maar vooral toegenomen administratieve last. In de bestaande landelijke databases krijgen fysiotherapeuten en hun patiënten de door hen zelf verzamelde patiëntdata via een online dashboard weliswaar teruggekoppeld, maar op een weinig betekenisvolle manier doordat het dashboard primair gericht is op wensen van externe partijen (zoals zorgverzekeraars). Door gebruik te maken van technologische innovaties zoals gepersonaliseerde datavisualisaties op basis van geavanceerde data science analyses kunnen patiëntdata betekenisvoller teruggekoppeld en ingezet worden. Wij zetten technologie dus in om ‘datagedragen’, gepersonaliseerde zorg, in dit geval binnen de fysiotherapie, een stap dichterbij te brengen. De kennis opgedaan in de project is tevens relevant voor andere zorgberoepen. In dit KIEM-project worden eerst wensen van eindgebruikers, bestaande succesvolle datavisualisaties en de hiervoor vereiste data science analyses geïnventariseerd (werkpakket 1: inventarisatie). Op basis hiervan worden meerdere prototypes van inzichtelijke datavisualisaties ontwikkeld (bijvoorbeeld visualisatie van patiëntscores in vergelijking met (beoogde) normscores, of van voorspelling van verwacht herstel op basis van data van vergelijkbare eerdere patiënten). Middels focusgroepinterviews met fysiotherapeuten en patiënten worden hieruit de meest kansrijke (maximaal 5) prototypes geselecteerd. Voor deze geselecteerde prototypes worden vervolgens de vereiste data-analyses ontwikkeld die de datavisualisaties op de dashboards van de landelijke databases mogelijk maken (werkpakket 2: prototypes en data-analyses). In kleine pilots worden deze datavisualisaties door eindgebruikers toegepast in de praktijk om te bepalen of ze daadwerkelijk aan hun wensen voldoen (werkpakket 3: pilots). Uit dit 1-jarige project kan een groot vervolgonderzoek ‘ontkiemen’ naar het effect van betekenisvolle datavisualisaties op de uitkomsten van zorg.
Size measurement plays an essential role for micro-/nanoparticle characterization and property evaluation. Due to high costs, complex operation or resolution limit, conventional characterization techniques cannot satisfy the growing demand of routine size measurements in various industry sectors and research departments, e.g., pharmaceuticals, nanomaterials and food industry etc. Together with start-up SeeNano and other partners, we will develop a portable compact device to measure particle size based on particle-impact electrochemical sensing technology. The main task in this project is to extend the measurement range for particles with diameters ranging from 20 nm to 20 um and to validate this technology with realistic samples from various application areas. In this project a new electrode chip will be designed and fabricated. It will result in a workable prototype including new UMEs (ultra-micro electrode), showing that particle sizing can be achieved on a compact portable device with full measuring range. Following experimental testing with calibrated particles, a reliable calibration model will be built up for full range measurement. In a further step, samples from partners or potential customers will be tested on the device to evaluate the application feasibility. The results will be validated by high-resolution and mainstream sizing techniques such as scanning electron microscopy (SEM), dynamic light scattering (DLS) and Coulter counter.
Digital transformation has been recognized for its potential to contribute to sustainability goals. It requires companies to develop their Data Analytic Capability (DAC), defined as their ability to collect, manage and analyze data effectively. Despite the governmental efforts to promote digitalization, there seems to be a knowledge gap on how to proceed, with 37% of Dutch SMEs reporting a lack of knowledge, and 33% reporting a lack of support in developing DAC. Participants in the interviews that we organized preparing this proposal indicated a need for guidance on how to develop DAC within their organization given their unique context (e.g. age and experience of the workforce, presence of legacy systems, high daily workload, lack of knowledge of digitalization). While a lot of attention has been given to the technological aspects of DAC, the people, process, and organizational culture aspects are as important, requiring a comprehensive approach and thus a bundling of knowledge from different expertise. Therefore, the objective of this KIEM proposal is to identify organizational enablers and inhibitors of DAC through a series of interviews and case studies, and use these to formulate a preliminary roadmap to DAC. From a structure perspective, the objective of the KIEM proposal will be to explore and solidify the partnership between Breda University of Applied Sciences (BUas), Avans University of Applied Sciences (Avans), Logistics Community Brabant (LCB), van Berkel Logistics BV, Smink Group BV, and iValueImprovement BV. This partnership will be used to develop the preliminary roadmap and pre-test it using action methodology. The action research protocol and preliminary roadmap thereby developed in this KIEM project will form the basis for a subsequent RAAK proposal.
Lectoraat, onderdeel van NHL Stenden Hogeschool
