784 research outputs found
Unearthing the Real Process Behind the Event Data The Case for Increased Process Realism
No full textThis book is a revised version of the PhD dissertation written by the author at Hasselt University in Belgium.This dissertation introduces the concept of process realism. Process realism is approached from two perspectives in this dissertation. First, quality dimensions and measures for process discovery are analyzed on a large scale and compared with each other on the basis of empirical experiments. It is shown that there are important differences between the different quality measures in terms of feasibility, validity and sensitivity. Moreover, the role and meaning of the generalization dimension is unclear. Second, process realism is also tackled from a data point of view. By developing a transparent and extensible tool-set, a framework is offered to analyze process data from different perspectives. From both perspectives, recommendations are made for future research, and a call is made to give the process realism mindset a central place within process mining analyses.
In 2020, the PhD dissertation won the “BPM Dissertation Award”, granted to outstanding PhD theses in the field of Business Process Management
Authorship as cultural performance: new perspectives in authorship studies
No full textThis article proposes a performative model of authorship, based on the historical alternation between predominantly 'weak' and 'strong' author concepts and related practices of writing, publication and reading. Based on this model, we give a brief overview of the historical development of such author concepts in English literature from the Middle Ages to the twentieth century. We argue for a more holistic approach to authorship within a cultural topography, comprising social contexts, technological and media factors, and other cultural developments, such as the distinction between privacy and the public sphere
A resilience assessment framework for complex engineered systems using graphical evaluation and review technique (GERT)
No full textSystem resilience characterizes the capability of maintaining the required functionality under disruptions, which is of great significance in evaluating the productivity and safety of complex engineered systems. Although most studies conduct resilience assessment from qualitative and quantitative perspectives, system functionality that reflects functional requirements for complex engineered systems needs to be elaborated. In addition, given that complex engineered systems achieve dynamic performance during disruptions, measuring the actual performance under uncertainty is imperative. To this end, this paper develops a quantitative framework to assess the resilience of complex engineered systems. The developed framework comprises three phases, functionality analysis, performance evaluation, and resilience assessment. Firstly, system functionality is analyzed using a functional tree illustrating the relationship between functions. The overall objective, primary functions, and sub-functions are identified according to task requirements. Secondly, system performance is quantified considering uncertain factors through Graphical Evaluation and Review Technique (GERT). Probabilistic branches and network logic are employed to represent the implementation of various functions. Finally, resilience assessment is carried out from the perspectives of anticipation, absorption, adaptation, and restoration abilities. A case study on the satellite network shows the effectiveness of the developed framework. The developed framework determines system functionality based on task requirements, evaluates system performance with limited information, and accurately assesses system resilience.Safety and Security Scienc
Recent advances on graphical evaluation and review techniques
No full textGraphical evaluation and review techniques (GERT) is a technique to study the stochastic nature of networks consists of different branches. In GERT, all branches are explained in terms of the probability that the branch is traversed and the tile to traverse the branch in case it is realized. This paper presents recent advances of the implementation of GERT in various industries. The study presents a comprehensive description of GERT and recent advances on the implementation of GERT in various industries over the period 2002-2017.Peer reviewedFinal article published.Network designGERTGraphical evaluation and review technique
Secularization – an empirically consolidated narrative in the face of an increasing influence of religion on politics
No full textWith this research Gert Pickel proposes an updated version of secularization’s narrative, contrasting it with the growing phenomena of religious pluralism, secular-religious polarization, and religiosity’s politicization in Europe. This article focuses especially on the European religious landscape of the late twentieth and early twenty-first century, analyzing the empirical developments in its indices of secularization, namely at the individual level. For this purpose, the author calls upon several statistical data that consider individuals’ attitudes towards religion, bearing in mind the different levels of modernization, as well as the political, religious and historical-cultural vicissitudes of the different countries. Despite religious affair’s proliferation in public debate, this article concludes that secularization remains empirically more convincing than the narrative of the return of religions. However, we are still far from speaking of a secular Europe
Ondersoek na faktore wat onbeplande onderhoud op bates van die Nasionale Departement van Openbare Werke beïnvloed (Afrikaans)
No full textThesis (MSc (Project Management))--University of Pretoria, 2004.The objective of this research project is to determine, by means of an exploratory study, which factors in Regional Offices of the National Department of Public Works, influence the success of unplanned maintenance on property. The report has been divided into five chapters. Chapter one consists mainly of the introduction, statement of the problem, hypothesis and delimitations and background of this report. Chapter two contains the literature review. Chapter three contains the research methodology and a practical investigation. Chapter four presents the collection and analysis of data. In the last chapter of this report, chapter five, the summary, conclusions and recommendations are presented.Construction Economicsunrestricte
The application of clinical metagenomics to central nervous system infections in a resource-limited setting
No full textClinical metagenomic sequencing (CMS) is a powerful tool that can overcome both the need for pathogen viability and a priori test selection, but infrastructure, expertise and reagent costs limit its accessibility, particularly in low- and middle-income countries. The recent expansion of genomic surveillance infrastructure in these regions presents an opportunity to redirect reserve capacity from decreased SARS-CoV-2-related demand to other applications. We evaluated the performance of a cerebrospinal fluid CMS assay and total cost of conventional investigations for central nervous system (CNS) infections in a referral centre in Cape Town, South Africa. Methods: Cerebrospinal fluid from 43 participants with suspected CNS infections, without an aetiological diagnosis at the time of sampling, underwent unbiased Illumina-based sequencing to evaluate for RNA and DNA from potential pathogens. CMS results were evaluated based on criteria for target genome coverage, clinical compatibility, likelihood of the target representing contamination and a score calculated from the target reads per million and genome size. Findings: CMS showed a positive percent agreement and negative percent agreement relative to conventional investigations of 76% (CI: 53-90%) and 90% (CI: 74-97%). A pathogen was detected by CMS in 8 (38%, n=8/21) immunocompromised and 2 (9%, n=2/22) immunocompetent participants. The median cost of conventional CNS infectious disease investigations was £180,80 (IQR: £127,40-£281,40) in immunocompromised participants and £68,56 (IQR: £9,81-£127,40) in immunocompetent individuals. Interpretation: CMS implementation with currently available sequencing infrastructure in low- and middle-income countries that perform SARS-CoV-2 genomic surveillance is feasible. Immunocompromised individuals may represent a priority group for CMS implementation in resource limited settings as a greater number of pathogens were identified at a comparable cost to conventional diagnostics
Corrigendum to “Rapid vacuum-driven monolayer assembly of microparticles on the surface of perforated microfluidic devices” [Powder Technology 390 (2021), 330–338] (Powder Technology (2021) 390 (330–338), (S0032591021004885), (10.1016/j.powtec.2021.05.079))
No full textThe authors regret to inform that they would like to change the corresponding author in the Elsevier system from Gert Desmet to Ignaas S. M. Jimidar. All authors have given their consent to make this change. See earlier correspondence and collected signatures from the authors. The authors would like to apologise for any inconvenience caused.</p
History of the Graeco-Latin fable /
No full text"This edition has been revised and updated by the author and Gert-Jan van Dijk."Includes bibliographical references and indexes.v. 1. Introduction and, From the origins to to the Hellenistic age -- v. 2. The fable during the Roman Empire and in the Middle Ages -- v. 3. Inventory and documentation of the Graeco-Latin fable
Corrigendum to A detailed study of the interaction between levitated microspheres and the target electrode in a strong electric field [Powder Technology 383 (2021), 292–301] (Powder Technology (2021) 383 (292–301), (S0032591021000528), (10.1016/j.powtec.2021.01.036))
No full textThe authors regret to inform that they would like to change the corresponding author in the Elsevier system from Gert Desmet to Ignaas Jimidar. All authors have given their consent to make this change. See earlier correspondence and collected signatures from the authors. The authors would like to apologise for any inconvenience caused
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