@inproceedings{10577, abstract = {{State-of-the-art frameworks for generating approximate circuits automatically explore the search space in an iterative process - often greedily. Synthesis and verification processes are invoked in each iteration to evaluate the found solutions and to guide the search algorithm. As a result, a large number of approximate circuits is subjected to analysis - leading to long runtimes - but only a few approximate circuits might form an acceptable solution. In this paper, we present our Jump Search (JS) method which seeks to reduce the runtime of an approximation process by reducing the number of expensive synthesis and verification steps. To reduce the runtime, JS computes impact factors for each approximation candidate in the circuit to create a selection of approximate circuits without invoking synthesis or verification processes. We denote the selection as path from which JS determines the final solution. In our experimental results, JS achieved speed-ups of up to 57x while area savings remain comparable to the reference search method, Simulated Annealing.}}, author = {{Witschen, Linus Matthias and Ghasemzadeh Mohammadi, Hassan and Artmann, Matthias and Platzner, Marco}}, booktitle = {{Proceedings of the 2019 on Great Lakes Symposium on VLSI - GLSVLSI '19}}, isbn = {{9781450362528}}, keywords = {{Approximate computing, design automation, parameter selection, circuit synthesis}}, location = {{Tysons Corner, VA, USA}}, publisher = {{ACM}}, title = {{{Jump Search: A Fast Technique for the Synthesis of Approximate Circuits}}}, doi = {{10.1145/3299874.3317998}}, year = {{2019}}, } @article{48877, abstract = {{OpenML is an online machine learning platform where researchers can easily share data, machine learning tasks and experiments as well as organize them online to work and collaborate more efficiently. In this paper, we present an R package to interface with the OpenML platform and illustrate its usage in combination with the machine learning R package mlr (Bischl et al. J Mach Learn Res 17(170):1—5, 2016). We show how the OpenML package allows R users to easily search, download and upload data sets and machine learning tasks. Furthermore, we also show how to upload results of experiments, share them with others and download results from other users. Beyond ensuring reproducibility of results, the OpenML platform automates much of the drudge work, speeds up research, facilitates collaboration and increases the users’ visibility online.}}, author = {{Casalicchio, Giuseppe and Bossek, Jakob and Lang, Michel and Kirchhoff, Dominik and Kerschke, Pascal and Hofner, Benjamin and Seibold, Heidi and Vanschoren, Joaquin and Bischl, Bernd}}, issn = {{0943-4062}}, journal = {{Computational Statistics}}, keywords = {{Databases, Machine learning, R, Reproducible research}}, number = {{3}}, pages = {{977–991}}, title = {{{OpenML: An R Package to Connect to the Machine Learning Platform OpenML}}}, doi = {{10.1007/s00180-017-0742-2}}, volume = {{34}}, year = {{2019}}, } @inproceedings{48409, author = {{Wessel, Lena}}, booktitle = {{Eleventh Congress of the European Society for Research in Mathematics Education (CERME11)}}, editor = {{Jankvist, Uffe Thomas and van den Heuvel-Panhuizen, Marja and Veldhuis, Michiel}}, keywords = {{Vocational education, language, percentages, scaffolding, design research}}, number = {{12}}, publisher = {{Freudenthal Group}}, title = {{{How theories of language-responsive mathematics can inform teaching designs for vocational mathematics}}}, volume = {{TWG07}}, year = {{2019}}, } @inproceedings{9992, abstract = {{State-of-the-art industrial compact high power electronic packages require copper-copper interconnections with larger cross sections made by ultrasonic bonding. In comparison to aluminium-copper, copper-copper interconnections require increased normal forces and ultrasonic power, which might lead to substrate damage due to increased mechanical stresses. One option to raise friction energy without increasing vibration amplitude between wire and substrate or bonding force is the use of two-dimensional vibration. The first part of this contribution reports on the development of a novel bonding system that executes two-dimensional vibrations of a tool-tip to bond a nail- like pin onto a copper substrate. Since intermetallic bonds only form properly when surfaces are clean, oxide free and activated, the geometries of tool-tip and pin were optimised using finite element analysis. To maximize the area of the bonded annulus the distribution of normal pressure was optimized by varying the convexity of the bottom side of the pin. Second, a statistical model obtained from an experimental parameter study shows the influence of different bonding parameters on the bond result. To find bonding parameters with the minimum number of tests, the experiments have been planned using a D-optimal experimental design approach.}}, author = {{Dymel, Collin and Eichwald, Paul and Schemmel, Reinhard and Hemsel, Tobias and Brökelmann, Michael and Hunstig, Matthias and Sextro, Walter}}, booktitle = {{(Proceedings of 7th Electronics System-Integration Technology Conference, Dresden, Germany)}}, keywords = {{ultrasonic wire-bonding, bond-tool design, parameter identification, statistical engineering}}, pages = {{1--6}}, title = {{{Numerical and statistical investigation of weld formation in a novel two-dimensional copper-copper bonding process}}}, year = {{2018}}, } @inproceedings{24395, abstract = {{In the field of lightweight design by composites, the V-Model forms the basis of inter- and transdisciplinary collaboration and research of 13 doctoral students from different disciplines, i. e. engineering, sciences and social sciences. The technological challenges of the research college itself and the V-Model as an approach for addressing these challenges are introduced. Within the cooperation of the young researchers, a technology demonstrator was produced. On the one hand this can be seen as demonstrator for the different technologies which are addressed by individual research and on the other hand for the interdisciplinary collaboration itself. Exemplary, this technology demonstrator is presented as one result of the research group and the challenges of the interdisciplinary collaboration while producing it are pointed out.}}, author = {{Weiß, Borkowski and Ilona, Horwath and Berscheid, Anna lena and Fischer, Silvia Dohmeier and Tröster, Thomas}}, keywords = {{Lightweight Design, Composites, Interdisciplinarity, Transdisciplinarity, V-Model.}}, location = {{Valencia, Spain}}, title = {{{NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH}}}, doi = {{Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)}}, year = {{2018}}, } @inproceedings{24468, abstract = {{Inter- and transdisciplinary research are new demands in Higher Education. Aiming to enhance the social relevance, usability and sustainability of technological products and solutions, society and public institutions such as research funding organizations increasingly expect engineers to include inter- and transdisciplinary approaches into the development of new technologies. Engineering research and education, however, are particularly challenging areas to realize inter- and transdisciplinary collaborations, for manifold reasons. This contribution presents methods and results of an inter- and transdisciplinary research and education strategy designed to meet the particular requirements of engineers and engineering students. It starts with a brief discussion of typical challenges regarding inter- and transdisciplinary approaches in engineering (research topics, research culture, skills, time, and barriers of lay people to involve in technology development). Secondly, it presents the methods developed to overcome those challenges within the context of the NRW Fortschrittskolleg "Light - Efficient - Mobile" (FK LEM). Founded in 2014, the FK LEM is a PhD programm focuses on lightweight construction, but with a special emphasis on how lightweight technologies are connected to different areas of society, to societal actors and technology users, and to the needs of a diversity of social groups. In order to explore these connections, we organized three workshops to bring public service, civil society, industry, practitioners and engineers together to discuss the perceived needs in those areas, and the potential of lightweight solutions. Topically, the workshops were dedicated to the fields of Rescue & Security Services; Care, Mobility & Assisted Living; and Sustainable Ressources & Climate Protection. Methodologically, we applied a pragmatic but valid approach to focus groups and discourse analysis. Results of the workshops in terms of directions for future research, epistemological and ethical dimensions of lightweight engineering are presented in the third part of our contribution. Finally, we discuss how our method and experience can be transferred into other engineering and educational contexts. With other words, how empowering students, engineers and the public to involve in inter- and transdisciplinary engineering processes can be achieved, and how this empowerment supports the development of innovative technologies as well as engineers’ skills to design technology in line with societies’ needs and challenges.}}, author = {{Horwath, Ilona and Dohmeier-Fischer, Silvia and Weiß-Borkowski, Nathalie and Tröster, Thomas}}, booktitle = {{INTED2018 Proceedings}}, keywords = {{Lightweight Design, Interdisciplinarity, Transdisciplinarity, Higher Education, Research Methods}}, title = {{{FROM EMPOWERMENT TO INNOVATION: INTER- AND TRANSDISCIPLINARY RESEARCH METHODS IN LIGHTWEIGHT ENGINEERING}}}, doi = {{10.21125/inted.2018.1651}}, year = {{2018}}, } @article{4516, abstract = {{Although many methods have been proposed for engineering service systems and customer solutions, most of these approaches give little consideration to recombinant service innovation. Recombinant innovation refers to reusing and integrating resources that were previously unconnected. In an age of networked products and data, we can expect that many service innovations will be based on adding, dissociating, and associating existing value propositions by accessing internal and external resources instead of designing them from scratch. The purpose of this paper is to identify if current service engineering approaches account for the mechanisms of recombinant innovation and to design a method for recombinant service systems engineering. In a conceptual analysis of 24 service engineering methods, the study identified that most methods (1) focus on designing value propositions instead of service systems, (2) view service independent of physical goods, (3) are either linear or iterative instead of agile, and (4) do not sufficiently address the mechanisms of recombinant innovation. The paper discusses how these deficiencies can be remedied and designs a revised service systems engineering approach that reorganizes service engineering processes according to four design principles. The method is demonstrated with the recombinant design of a service system for predictive maintenance of agricultural machines.}}, author = {{Beverungen, Daniel and Lüttenberg, Hedda and Wolf, Verena}}, issn = {{2363-7005}}, journal = {{Business & Information Systems Engineering}}, keywords = {{Service engineering, Recombinant innovation, (Product-)service system, Design science research, New service development}}, number = {{5}}, pages = {{377--391}}, publisher = {{SpringerNature}}, title = {{{Recombinant Service Systems Engineering}}}, doi = {{10.1007/s12599-018-0526-4}}, volume = {{60}}, year = {{2018}}, } @inbook{57891, abstract = {{This article provides an insight into a qualitative research project concerning music educational practices with mobile music technologies. Based on social systems theory, this grounded-theory study observes how groups in two extracurricular music classes construct different technologies (e. g., iPads, mixers, ear phones) within the emergence of (reflexive) expectations as social structures. The results reveal five categories of technologies: technology as an instrument-toy-alternator that supports motivation, as a medium for knowledge and learning, as an adjusting device used for socio-aesthetic decision making, as a didactical tool for task-based situations, and as an isolator for inner differentiation by focusing aural perception. (DIPF/Orig.)}}, author = {{Godau, Marc}}, booktitle = {{Musikpädagogik und Kulturwissenschaft}}, editor = {{Cvetko, Alexander J. and Rolle, Christian}}, keywords = {{Musical education, Musikpädagogik, Musikunterricht, Deployment of media, Medien, Medieneinsatz, Mobile Computing, Music lessons, Qualitative Forschung, Qualitative research, Teaching of music, Use of media}}, pages = {{237–249}}, publisher = {{Waxmann}}, title = {{{Apps in der musikpädagogischen Praxis. Eine explorative Studie zur kommunikativen Konstruktion von mobilen Technologien im schulischen Nachmittagsbereich}}}, volume = {{38}}, year = {{2018}}, } @inbook{57889, abstract = {{During the past decade, there has been an increase of pedagogical research under conditions of posthuman theories, such as the Actor Network Theory or post-phenomenology. Yet, there has not been much research on the materiality of music pedagogical practices. This article introduces an ongoing grounded-theory study on the role of things (e.g., music instruments, black board, or digital devices) within the music classroom. Results from the analysis of group discussions and interviews with student teachers show tensions between personal preferences, school conventions, and material conventions within the process of introducing things into the classroom. (DIPF/Orig.)}}, author = {{Godau, Marc}}, booktitle = {{Soziale Aspekte des Musiklernens}}, editor = {{Clausen, Bernd and Dreßler, Susanne}}, keywords = {{Interview, Lehrer, Musical education, Musikpädagogik, Musikunterricht, Teacher, Music lessons, Qualitative Forschung, Qualitative research, Teaching of music, Object, Objekt, Ding, Handlung, Practice, Praxis, Probationary teacher training, Referendariat}}, pages = {{43–55}}, publisher = {{Waxmann}}, title = {{{Wie kommen die Dinge in den Musikunterricht? Zur Materialität musikpädagogischer Praxis am Beispiel divergierender Orientierungen im Kontext unterrichtsbezogenen Handelns angehender Lehrkräfte}}}, year = {{2018}}, } @inbook{57890, abstract = {{Within recent years, research on music learning in groups has increased. But the distinction between collaboration and cooperation is mostly unclear. This article aims to distinguish both concepts by presenting a study on popular music learning in groups (Godau, 2017) based on elements of the learning approach in Musical Futures (Green, 2008). As a result, the two concepts are seen as complementary. They form the poles of a continuum of collective learning: Collaboration characterizes the collective action toward the common goal. By contrast, cooperation occurs when group members act separately toward achieving the common goal. (DIPF/Orig.)}}, author = {{Godau, Marc}}, booktitle = {{Soziale Aspekte des Musiklernens}}, editor = {{Clausen, Bernd and Dreßler, Susanne}}, keywords = {{Kollaboration, Musik, Learning, Lernen, Musical education, Musikpädagogik, Pop music, Popmusik, Popular Music, Studie, Musikunterricht, Music lessons, Qualitative Forschung, Qualitative research, Teaching of music, Constructivism, Cooperation, Cooperative learning, Gruppe, Klassenmusizieren, Konstruktivismus, Kooperation, Kooperatives Lernen, Learning psychology, Lernpsychologie, Psychology of learning}}, pages = {{131–144}}, publisher = {{Waxmann}}, title = {{{Kollaboration und Kooperation beim Klassenmusizieren mit Populärer Musik. Musikmachen in der Schule im Spannungsfeld von Lernen mit der Gruppe und für die Gruppe}}}, year = {{2018}}, } @article{4947, abstract = {{Manufacturers increasingly integrate information and communication technologies into their products so that they can provide IT-based services. Organizations that formerly concentrated on transactional sales thus confront a new challenge associated with managing service usage—retention and extracting value from investments in smart technology. This study combines a marketing and an information systems perspective in a field study conducted jointly with a large European car manufacturer. Understanding the renewal decision for IT-based service contracts requires knowledge from both disciplines. The paper shows that combining behavioral predictor variables stemming from marketing research and technology-related perceptual variables stemming from technology acceptance research increases the explanatory power and prediction accuracy of forecasting models for customer renewal decisions. Specifically, the authors show that perceptions of usefulness become more important the longer customers use IT-based services and the more services they use within the service contract.}}, author = {{Wangenheim, Florian v and Wünderlich, Nancy and Schumann, Jan H}}, journal = {{Journal of Business Research}}, keywords = {{IT-based service, Smart services, Contract renewal, Retention, Customer churn, Free trial}}, number = {{79}}, pages = {{181----188}}, publisher = {{Elsevier}}, title = {{{Renew or cancel? Drivers of customer renewal decisions for IT-based service contracts}}}, year = {{2017}}, } @inproceedings{9974, abstract = {{The integrated modeling of behavior and reliability in system development delivers a model-based approach for reliability investigation by taking into account the dynamic system behavior as well as the system architecture at different phases of the development process. This approach features an automated synthesis of a reliability model out of a behavior model enabling for the closed loop modeling of degradation of the system and its (dynamic) behavior. The approach is integrated into the development process following Systems Engineering. It is based on standard models used in model-based development methodologies i.e. SysML or Matlab/Simulink. In addition to the theoretical description of the necessary steps the procedure is validated by an application example at two stages of the development process.}}, author = {{Hentze, Julian and Kaul, Thorben and Grässler, Iris and Sextro, Walter}}, booktitle = {{ICED17, 21st International conference on enginieering design}}, keywords = {{Design for X (DfX), Product modelling / models, Robust design, Systems Engineering (SE), Reliability}}, pages = {{385--394}}, title = {{{Integrated modeling og behavior and reliability in system development}}}, year = {{2017}}, } @inproceedings{9978, abstract = {{Piezoelectric transducers are used in a wide range of applications. Reliability of these transducers is an important aspect in their application. Prognostics, which involve continuous monitoring of the health of technical systems and using this information to estimate the current health state and consequently predict the remaining useful lifetime (RUL), can be used to increase the reliability, safety, and availability of the transducers. This is achieved by utilizing the health state and RUL predictions to adaptively control the usage of the components or to schedule appropriate maintenance without interrupting operation. In this work, a prognostic approach utilizing self-sensing, where electric signals of a piezoelectric transducer are used as the condition monitoring data, is proposed. The approach involves training machine learning algorithms to model the degradation of the transducers through a health index and the use of the learned model to estimate the health index of similar transducers. The current health index is then used to estimate RUL of test components. The feasibility of the approach is demonstrated using piezoelectric bimorphs and the results show that the method is accurate in predicting the health index and RUL.}}, author = {{Kimotho, James Kuria and Sextro, Walter and Hemsel, Tobias}}, booktitle = {{IEEE Transactions on Reliability}}, keywords = {{Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing}}, pages = {{1 -- 10}}, title = {{{Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing}}}, doi = {{10.1109/TR.2017.2710260}}, year = {{2017}}, } @article{5633, abstract = {{Literature reviews (LRs) are recognized for their increasing impact in the information systems literature. Methodologists have drawn attention to the question of how we can leverage the value of LRs to preserve and generate knowledge. The panelists who participated in the discussion of ?Standalone Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?? at ICIS 2016 in Dublin acknowledged this significant issue and debated a) what the IS field can learn from other fields and where IS-specific challenges occur, b) how the IS field should move forward to foster the genre of LRs, and c) what best practices are to train doctoral IS students in publishing LRs. This article reports the key takeaways of this panel discussion. Guidance for IS scholars is provided on how to conduct LRs that contribute to the cumulative knowledge development within and across the IS field to best prepare the next generation of IS scholars.}}, author = {{Schryen, Guido and Benlian, Alexander and Rowe, Frantz and Shirley, Gregor and Larsen, Kai and Petter, Stacie and Par{\'e}, Guy and Wagner, Gerit and Haag, Steffi and Yasasin, Emrah}}, issn = {{1529-3181}}, journal = {{Communications of the AIS}}, keywords = {{Literature Review, Review Methodology, Research Methodology, Doctoral Training}}, pages = {{557 -- 569}}, publisher = {{Association for Information Systems (AIS)}}, title = {{{Literature Reviews in IS Research: What Can Be Learnt from the Past and Other Fields?}}}, volume = {{40}}, year = {{2017}}, } @inproceedings{10676, author = {{Ho, Nam and Kaufmann, Paul and Platzner, Marco}}, booktitle = {{2017 International Conference on Field Programmable Technology (ICFPT)}}, keywords = {{Linux, cache storage, microprocessor chips, multiprocessing systems, LEON3-Linux based multicore processor, MiBench suite, block sizes, cache adaptation, evolvable caches, memory-to-cache-index mapping function, processor caches, reconfigurable cache mapping optimization, reconfigurable hardware technology, replacement strategies, standard Linux OS, time a complete hardware implementation, Hardware, Indexes, Linux, Measurement, Multicore processing, Optimization, Training}}, pages = {{215--218}}, title = {{{Evolvable caches: Optimization of reconfigurable cache mappings for a LEON3/Linux-based multi-core processor}}}, doi = {{10.1109/FPT.2017.8280144}}, year = {{2017}}, } @inproceedings{10780, author = {{Guettatfi, Zakarya and Hübner, Philipp and Platzner, Marco and Rinner, Bernhard}}, booktitle = {{12th International Symposium on Reconfigurable Communication-centric Systems-on-Chip (ReCoSoC)}}, keywords = {{embedded systems, image sensors, power aware computing, wireless sensor networks, Zynq-based VSN node prototype, computational self-awareness, design approach, platform levels, power consumption, visual sensor networks, visual sensor nodes, Cameras, Hardware, Middleware, Multicore processing, Operating systems, Runtime, Reconfigurable platforms, distributed embedded systems, performance-resource trade-off, self-awareness, visual sensor nodes}}, pages = {{1--8}}, title = {{{Computational self-awareness as design approach for visual sensor nodes}}}, doi = {{10.1109/ReCoSoC.2017.8016147}}, year = {{2017}}, } @inbook{48411, author = {{Wessel, Lena}}, booktitle = {{Proceedings of the Tenth Congress of the European Society for Research in Mathematics Education (CERME10, February 1 – 5, 2017)}}, editor = {{Dooley, T. and Gueudet, G.}}, keywords = {{Academic language, relative frequency, scaffolding, design research, trace analysis}}, pages = {{1388--1395}}, publisher = {{DCU Institute of Education and ERME.}}, title = {{{How do students develop lexical means for understanding the concept of relative frequency? Empirical insights on the basis of trace analyses}}}, year = {{2017}}, } @article{36481, abstract = {{Recent studies highlight early childhood teachers’ mathematics-related competence. Developing this competence should be a main aspect of early childhood teachers’ education. This is, however, not the case in all countries. Consequently, high-quality professional development courses are needed. Based on research results, we developed a competence-oriented continuous professional development course ("EmMa") and examined the effects of "EmMa" by asking: How does "EmMa" affect the development of early childhood teachers’ i) mathematical content knowledge, ii) mathematical pedagogical content knowledge and iii) beliefs towards mathematics in general? To answer these questions, we conducted a pre-test/post-test study including a control group with 99 in-service early childhood teachers. Results show that the course affected teachers’ mathematical pedagogical content knowledge and static orientation towards mathematics positively. From this we conclude that scaling-up "EmMa" might be a suitable approach to bridge the gap between pre-service education with nearly no mathematics and the challenges of early mathematics education.}}, author = {{Bruns, Julia and Eichen, Lars and Gasteiger, Hedwig}}, journal = {{Mathematics Teacher Education and Development (MTED)}}, keywords = {{Beliefs, Competency Based Teacher Education, Control Groups, Early Childhood Education, Faculty Development, Foreign Countries, Inservice Teacher Education, Intervention, Mathematical Aptitude, Mathematics Skills, Pedagogical Content Knowledge, Preschool Teachers, Pretests Posttests, Professional Continuing Education, Statistical Analysis, Teacher Competency Testing}}, number = {{3}}, pages = {{76–93}}, title = {{{Mathematics-related Competence of Early Childhood Teachers Visiting a Continuous Professional Development Course: An Intervention Study}}}, volume = {{19}}, year = {{2017}}, } @inproceedings{191, abstract = {{One purpose of requirement refinement is that higher-level requirements have to be translated to something usable by developers. Since customer requirements are often written in natural language by end users, they lack precision, completeness and consistency. Although user stories are often used in the requirement elicitation process in order to describe the possibilities how to interact with the software, there is always something unspoken. Here, we present techniques how to automatically refine vague software descriptions. Thus, we can bridge the gap by first revising natural language utterances from higher-level to more detailed customer requirements, before functionality matters. We therefore focus on the resolution of semantically incomplete user-generated sentences (i.e. non-instantiated arguments of predicates) and provide ontology-based gap-filling suggestions how to complete unverbalized information in the user’s demand.}}, author = {{Geierhos, Michaela and Bäumer, Frederik Simon}}, booktitle = {{Proceedings of the 21st International Conference on Applications of Natural Language to Information Systems (NLDB)}}, editor = {{Métais, Elisabeth and Meziane, Farid and Saraee, Mohamad and Sugumaran, Vijayan and Vadera, Sunil }}, isbn = {{978-3-319-41753-0}}, keywords = {{Requirement refinement, Concept expansion, Ontology-based instantiation of predicate-argument structure}}, location = {{Salford, UK}}, pages = {{37--47}}, publisher = {{Springer}}, title = {{{How to Complete Customer Requirements: Using Concept Expansion for Requirement Refinement}}}, doi = {{10.1007/978-3-319-41754-7_4}}, volume = {{9612}}, year = {{2016}}, } @article{5700, abstract = {{Purpose – The purpose of this paper is to examine the nature of context and its implications for theory and research in service. Design/methodology/approach – This is a conceptual paper based on exploring existing research and theory related to context in service research. Findings – The characteristics of service make context both important and challenging, there is great contextual diversity in service research as reflected, for example in ecosystems made up of multiple contextual variables. There is a need to identify the context-specific nature of middle range theory and the contextual logic of general theory. The authors explore the challenges of context for service theory and how we might learn from theory in a particular context and test or adapt it in other contexts. Originality/value – The findings of this paper are of value to researchers seeking to develop and justify theory in service research (general, middle range or theory in use).}}, author = {{Voss, Chris and Perks, Helen and Sousa, Rui and Witell, Lars and Wünderlich, Nancy}}, journal = {{Journal of Service Management}}, keywords = {{Research, Service theory}}, number = {{1}}, pages = {{30--36}}, publisher = {{Emerald Group Publishing Limited}}, title = {{{Reflections on Context in Service Research.}}}, volume = {{27}}, year = {{2016}}, }