bluuebunny/crossref_metadata_2025 huggingface dataset:
Gold Nanoparticles Thin Films with Thermo‐ and Photoresponsive Plasmonic Properties Realized with Liquid‐Crystalline Ligands
Authors: Tomczyk Ewelina , Promiński Aleksander , Bagiński Maciej , Górecka Ewa , Wójcik Michał
Published: July 2019

Robust synthesis of large‐scale self‐assembled nanostructures with long‐range organization and a prominent response to external stimuli is critical to their application in functional plasmonics. Here, the first example of a material made of liquid crystalline nanoparticles which exhibits UV‐light responsive surface plasmon resonance in a condensed state is presented. To obtain the material, metal cores are grafted with two types of organic ligands. A promesogenic derivative softens the system and induces rich liquid crystal phase polymorphism. Second, an azobenzene derivative endows nanoparticles with photoresponsive properties. It is shown that nanoparticles covered with a mixture of these ligands assemble into long‐range ordered structures which exhibit a novel dual‐responsivity. The structure and plasmonic properties of the assemblies can be controlled by a change in temperature as well as by UV‐light irradiation. These results present an efficient way to obtain bulk quantities of self‐assembled nanostructured materials with stability that is unattainable by alternative methods such as matrix‐assisted or DNA‐mediated organization.
A multiband circular loop antenna with parasitic C‐strip line and FSS ring resonator reflectors for WLAN and WiMAX applications
Authors: Wongsin Norakamon , Mahatthanajatuphat Chatree , Akkaraekthalin Prayoot
Published: July 2019

A circular loop antenna with C‐strip line and frequency selective surface (FSS) ring resonator reflectors is presented. It can support multiband operation and enhance gain. The circular loop antenna is excited by using the coplanar stripe line, and a parasitic line is placed on the antenna to improve the impedance bandwidth of the upper frequency band. Moreover, the gain enhancement technique of FSS is applied to the antenna for achieving 7.54, 11.1, and 7.44 dBi at operating frequencies of 2.45, 3.5, and 5.25 GHz, respectively. The antenna's radiation patterns are directional patterns at all operating frequency bands. The presented antenna responds to the multiband operations of WLAN IEEE802.11 b/g (2.4–2.485 GHz), WiMAX (3.3–3.8 GHz), and WLAN IEEE802.11a (5.15–5.35 GHz). © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Quantifying the efficiency and biases of forest Saccharomyces sampling strategies
Authors: Boynton Primrose J. , Kowallik Vienna , Landermann Doreen , Stukenbrock Eva H.
Published: July 2019

Saccharomyces yeasts are emerging as model organisms for ecology and evolution, and researchers need environmental Saccharomyces isolates to test ecological and evolutionary hypotheses. However, methods for isolating Saccharomyces from nature have not been standardized, and isolation methods may influence the genotypes and phenotypes of studied strains. We compared the effectiveness and potential biases of an established enrichment culturing method against a newly developed direct plating method for isolating forest floor Saccharomyces spp. In a European forest, enrichment culturing was both less successful at isolating Saccharomyces paradoxus per sample collected and less labour intensive per isolated S. paradoxus colony than direct isolation. The two methods sampled similar S. paradoxus diversity: The number of unique genotypes sampled (i.e., genotypic diversity) per S. paradoxus isolate and average growth rates of S. paradoxus isolates did not differ between the two methods, and growth rate variances (i.e., phenotypic diversity) only differed in one of three tested environments. However, enrichment culturing did detect rare Saccharomyces cerevisiae in the forest habitat and also found two S. paradoxus isolates with outlier phenotypes. Our results validate the historically common method of using enrichment culturing to isolate representative collections of environmental Saccharomyces. We recommend that researchers choose a Saccharomyces sampling method based on resources available for sampling and isolate screening. Researchers interested in discovering new Saccharomyces phenotypes or rare Saccharomyces species from natural environments may also have more success using enrichment culturing. We include step‐by‐step sampling protocols in the supplemental materials.
Erratum to: Magnetic quivers, Higgs branches and 6d $$ \mathcal{N} $$ = (1, 0) theories
Authors: Cabrera Santiago , Hanany Amihay , Sperling Marcus
Published: July 2019

Due to a mistake introduced by JHEP during the typesetting stage, all equations in the original article have been altered.
AdS3 reconstruction with general gravitational dressings
Authors: Chen Hongbin , Kaplan Jared , Sharma Utkarsh
Published: July 2019

Abstract

The gauge redundancy of quantum gravity makes the definition of local operators ambiguous, as they depend on the choice of gauge or on a ‘gravitational dressing’ analogous to a choice of Wilson line attachments. Recent work identified exact AdS3 proto-fields by fixing to a Fefferman-Graham gauge. Here we extend that work and define proto-fields with general gravitational dressing. We first study bulk fields charged under a U(1) Chern-Simons gauge theory as an illustrative warm-up, and then generalize the results to gravity. As an application, we compute a gravitational loop correction to the bulk-boundary correlator in the background of a black hole microstate, and then verify this calculation using a newly adapted recursion relation. Branch points at the Euclidean horizon are present in the 1/c corrections to semiclassical correlators.
Bulk viscosity at extreme limits: from kinetic theory to strings
Authors: Czajka Alina , Dasgupta Keshav , Gale Charles , Jeon Sangyong , Misra Aalok , Richard Michael , Sil Karunava
Published: July 2019

Abstract

In this paper we study bulk viscosity in a thermal QCD model with large number of colors at two extreme limits: the very weak and the very strong ’t Hooft couplings. The weak coupling scenario is based on kinetic theory, and one may go to the very strong coupling dynamics via an intermediate coupling regime. Although the former has a clear description in terms of kinetic theory, the intermediate coupling regime, which uses lattice results, suffers from usual technical challenges that render an explicit determination of bulk viscosity somewhat difficult. On the other hand, the very strong ’t Hooft coupling dynamics may be studied using string theories at both weak and strong string couplings using gravity duals in type IIB as well as M-theory respectively. In type IIB we provide the precise fluctuation modes of the metric in the gravity dual responsible for bulk viscosity, compute the speed of sound in the medium and analyze the ratio of the bulk to shear viscosities. In M-theory, where we uplift the type IIA mirror dual of the UV complete type IIB model, we study and compare both the bulk viscosity and the sound speed by analyzing the quasi-normal modes in the system at strong IIA string coupling. By deriving the spectral function, we show the consistency of our results both for the actual values of the parameters involved as well for the bound on the ratio of bulk to shear viscosities.
Inclusive heavy flavor jet production with semi-inclusive jet functions: from proton to heavy-ion collisions
Authors: Li Hai Tao , Vitev Ivan
Published: July 2019

Abstract

The past several years have witnessed important developments in the QCD theory of jet production and jet substructure in hadronic collisions. In the framework of soft-collinear effective theory, semi-inclusive jet functions and semi-inclusive fragmenting jet functions have allowed us to combine higher order calculations with resummation of potentially large logarithms of the jet radius, ln R. Very recently, the semi-inclusive jet functions for partons fragmenting into heavy flavor jets were computed by Dai, Kim and Leibovich. In this paper we show how the formalism can be extended to c-jet and b-jet production in heavy ion collisions. The semi-inclusive jet functions for heavy flavor jets in a QCD medium are evaluated up to the next-to-leading order in α

s
and first order in opacity. For phenomenological applications, we also consider the inclusion of the cold nuclear matter effects and the jet energy dissipation due to collisional interactions in matter. We present the numerical predictions for the cross sections and the corresponding nuclear modification factors in proton-nucleus and nucleus-nucleus collisions and compare our results to data from the Large Hadron Collider.
On the optimality of monetary trading
Authors: Carmona Guilherme
Published: July 2019

People have long been trading in a “monetary” way. This persistence of monetary trading suggests that it might be an efficient trading mechanism. We formalize this intuition in a random-matching, absence-of-double-coincidence-of-wants environment. The record-keeping technology is operated by an information-processing center which summarizes and updates individuals’ past trading behavior in a binary variable. A trading mechanism consists of an updating rule and an individual trading behavior rule. To capture the difficulties in collecting and processing information about others’ past behavior, we assume that the center faces costs, both fixed and variable, to operate. We show that (1) any non-autarkic equilibrium trading mechanism is, in terms of aggregate variables (such as consumption and frequency of trade), observationally equivalent to a monetary trading mechanism and (2) any non-autarkic optimal equilibrium trading mechanism is a monetary trading mechanism.
Nonlinear phase error analysis of equivalent thickness in a white-light spectral interferometer
Authors: Guo Tong , Weng Qianwen , Luo Bei , Chen Jinping , Fu Xing , Hu Xiaotang
Published: July 2019

A white light spectral interferometry based on a Linnik type system was established to accurately measure the thin film thickness through transparent medium. In practical work, the equivalent thickness of a beam splitter and the mismatch of the objective lens introduce nonlinear phase errors. Adding a transparent medium also increases the equivalent thickness. The simulation results show that the equivalent thickness has a significant effect on thin film thickness measurements. Therefore, it is necessary to perform wavelength correction to provide a constant equivalent thickness for beam splitters. In the experiments, some pieces of cover glasses as the transparent medium were added to the measured beam and then a standard thin film thickness of 1052.2±0.9 nm was tested through the transparent medium. The results demonstrate that our system has a nanometer-level accuracy for thin film thickness measurement through transparent medium with optical path compensation.
Tailor-Made Design Guidelines for Human Factors and Usability for Medical Device Application: A Proposed Methodology
Authors: Nagarajan Kamya , Silva Arlindo
Published: July 2019

With increasing level of advancement and complexity in medical devices, there is a need for methodology, tools and techniques in practice to integrate Human Factors and Usability (HF/U) elements in design due to its increasing diversity of users and rapidly changing interface types. This paper proposes a methodology to develop a tailor-made HF/U design guidelines for medical device development with various sources and to develop heuristics for evaluation and score the product usability throughout the development process.
Analysis of the Consequences of Disrupting Events on Ongoing Product Development Projects: The Cascading Effects of Severe Influences
Authors: Guaragni Fausto , Ortt Roland , Paetzold Kristin
Published: July 2019

The initial planning of the development of complicated products usually requires time and efforts. However, even the most accurate plans are not able to cope with all the uncertainties that might arise during an ongoing project. If a severe uncertainty affect the development project a critical situation arises and a disruption might happen. The present literature does not offer a comprehensive solution on how to investigate these type of events after they occurred. This contribution presents a model that aims to analyse and better understand disruptions that affect ongoing product development projects.
Creation of a Framework of Design Tool Characteristics to Support Evaluation and Selection of Visualisation Tools
Authors: Zhang Wenwen , Ranscombe Charlie , Radcliffe David , Jackson Simon
Published: July 2019

In Industrial Design, new design visualisation tools are emerging offering significant benefits to the designers. However, studies show alongside some benefits, new tools can also inhibit designers' creativity or cause time inefficiency if used in the wrong context. Thus, understanding which tools to use and when during the design process is increasingly necessary to ensure the best use of resources in design practice. Existing research on understanding the performance of design tools and the resulting frameworks for comparing tools are either specific to certain tools or highly generalised making evaluation across different design tools challenging. As such, this paper reports the creation of a more comprehensive framework of design tool characteristics to facilitate a better understanding of design tools and their uses. Demonstration of application of the framework is also given in the form of a case study on the use of Digital Sketching and its comparable tools with four practising designers. In conclusion, we show how the Design Tool Characteristics (DTCs) framework is an effective way to understand design tools, with further implications for design tool development.
Cross-Cultural Differences in Creative Ideation: A Comparison between Singaporean and Portuguese Students
Authors: Koronis Georgios , Meurzec Rianne Wally , Silva Arlindo , Leite Marco , Henriques Elsa , Yogiaman Christine
Published: July 2019

The purpose of this work is to compare the creative outcome in the educational context of students belonging to two different cultures, namely Singaporean and Portuguese and determine whether they respond differently to the same design brief. The participants from both samples equal 121 student designers and span from 18–25 years old. Students were randomly distributed within a uniform, standard of student performance, which allowed for fair comparison between groups. Expert judges were employed to judge the creativity of concept sketches generated during a Collaborative Sketching exercise. To evaluate the creative outcome, we employed the Consensual Assessment Technique based on a rubric-based system developed in our earlier works. The analysis of variance procedure revealed no statistically significant difference between the averaged total scores of the two groups on the appropriateness measure. However, the student designers from both samples showed statistically significant differences when provided with a baseline brief in the novelty measure. In consideration of the overall creativity scores, a relatively equivalent performance is observed across the two universities.
A Comparison of Design Activity of Academics and Practitioners Using the FBS Ontology: A Case Study
Authors: Hurst Ada , Nespoli Oscar G. , Abdellahi Sarah , Gero John S.
Published: July 2019

Academics teach engineering design based on design theory and best practices, practitioners teach design based on their experience. Is there a difference between them? There appears to be little prior work in comparing the design processes of design academics and practitioners. This paper presents a case study in which the design activity of a team of academics was compared to that of a team of practitioners. The participants’ verbalizations during team discussions were coded using the Function- Behaviour-Structure (FBS) ontology. A qualitative comparison reveals that the team of practitioners constructs the design space earlier and generally spends more time in the solution space than the team of academics. Further, the team of practitioners has a significant number of direct transitions from function (F) to structure (S), while no such transitions are observed for the team of academics. Given that this is a single case study, the results cannot be used as the basis for any generalizations on how academics and practitioners compare. This is a successful proof of methodologies that lay the foundation for a series of hypotheses to be tested in a future study.
Developing Design Methods - a Conceptual Requirement Framework
Authors: Becerril Lucia , Guertler Matthias , Longa Emmanuel
Published: July 2019

Design methods can provide valuable support in structuring and solving complex product design problems. However, the application and the transfer of methods from academia to industry is limited. To date, research has tended to focus on solving this through improved method selection, method adaptation and training. The development of design methods itself has attracted surprisingly low attention. This paper closes this gap and adds a quite new perspective of systematic requirement management of method development. However, the variety of methods, method users and application contexts is a key challenge and does not allow for a universal set of requirements. Thus, this paper transfers the concept of solution-neutral requirements frameworks, which are established in product design, to method development. The framework is derived from analysing and structuring different requirements found in literature. Different requirement sub-/categories allow for accommodating the varying levels of detail of requirements. The framework works like a checklist and helps design researchers to consider the most important requirement categories, which subsequently can be detailed project-specifically.
Influence of Gas-Filled Gaps on the Thermal Behaviour of Dual Purpose Casks
Authors: Dinkel Christian , Billenstein Daniel , Rieg Frank , Roith Bernd
Published: July 2019

Basically, the safe dissipation of heat is among others an important protection objective of dual purpose casks. Gas-filled gaps within such casks can play a major role for the thermal behavior as they act as thermal barriers due to the lower heat conductivity of gaseous fluids in comparison to metallic materials. However, additional heat transmission mechanisms, such as natural convection and radiation can also occur in a gaseous medium. This leads to both an expanded modelling and a prolonged computing time in numerical simulations. Within the scope of a research project in cooperation with Swiss Federal Nuclear Safety Inspectorate ENSI a simulation tool for the fast thermal evaluation of dual purpose casks is developed which combines analytical methods and FEA. The innovation is that the thermal effects of gas-filled gaps are considered by using analytical equations. Main focus lies on the implementation of heat radiation as a non-linear transfer mechanism. Therefore, an iterative calculation process is used and the effects of the iteration number is investigated. Furthermore, the influence of radiation in comparison to pure conduction is examined depending on the gap width.
Speculative and Critical Design — Features, Methods, and Practices
Authors: Johannessen Leon Karlsen , Keitsch Martina Maria , Pettersen Ida Nilstad
Published: July 2019

Speculative and Critical Design (SCD) confronts traditional design practice. Instead of reproducing and reinforcing contemporary perceptions of products and services, SCD seeks to change them, with the goal to spur a public debate e.g. on what is a preferable societal development. SCD methods comprise among others speculative narratives and design of critical objects. However, the theoretical fundament of SCD is feeble, and concepts and methods are upheld of mere examples.

The article aims to present the features, methods, and practice of SCD, and locate it in the design field. Following the introduction, section 2 presents features and SCD methods and practices. Section 3 links SCD to traditional design and identifies benefits and challenges relating to its role as a supplement to today's design practice. The final section suggests topics for further SCD research.

The article benefits designers in search for alternatives to commercially oriented design approaches. Findings indicate that SCD can contribute to creating new societal roles for designers, foster innovation in the relationship between designers and users, and encourage creativity through imaginative aesthetics.
The First Steps Towards Innovation: A Reference Process for Developing Product Profiles
Authors: Wilmsen Miriam , Dühr Katharina , Heimicke Jonas , Albers Albert
Published: July 2019

Successful companies spend many of their resources in the initiation and realisation of innovation projects, which might be successful at the market. Especially in the early phase of these projects, there is a high degree of uncertainty and therefore, product profiles established themselves as methodological support for product developers. However, it is not possible to give developers a straight and always equal process to follow for developing these product profiles. Based on this problem, this contribution investigates context-independent process steps to develop promising product profiles. Thus, this work provides a possible reference process to develop product profiles to support product developers in the early stage of innovation projects. Therefore, 631 process steps of 16 innovation projects were analysed and 100 process steps were derived from literature. Based on an expert workshop, 48 of these process steps were identified as relevant to consider in a context-independent reference process model. In a further empirical Live-Lab study, process patterns were investigated and the usability and relevance of the process steps were evaluated as positive.
The Process and Operations of Shape Generation and Manipulation during the Architectural Designing Activity
Authors: Bouhelis Walid , Arrouf Abdelmalek
Published: July 2019

This piece of work is concerned with how shapes are generated, explored and transformed during the architectural designing process. It postulates that the relations and connections between sketches, produced during the design activity, can be defined in terms of shape transformations and described according to a closed list of shape operators. These latters provide a formal description of the shape exploration process and allow a deep understanding of its logic. To achieve its goal, this study creates a model to describe the different shape transformations, performed by designers, during the sketching activity.
The Reference System in the Model of PGE: Proposing a Generalized Description of Reference Products and their Interrelations
Authors: Albers Albert , Rapp Simon , Spadinger Markus , Richter Thilo , Birk Clemens , Marthaler Florian , Heimicke Jonas , Kurtz Victor , Wessels Holger
Published: July 2019

Samsung recently introduced a new smartphone display with increased breaking resistance, which will probably be relevant for future cars as well. This example shows that subsystems, in general artefacts from former development processes can be relevant for subsequent projects. Their integration has to be planned, i.a. even before the original product is in the market and across branches. The research on supporting methods requires a suitable description model for this phenomenon. Research in design reuse and PGE – product generation engineering addresses this only partially yet. Design reuse focuses on the informational aspect, PGE refers primarily to reference products. This contribution aims at closing this gap as a basis for future research. Two case studies from industry projects by the authors and an example from foresight and product planning show the role of artefacts from former development processes in running projects. It is described which artefacts are used as a reference, why they are used and when. Based on these findings the authors propose the term “reference system” to depict the whole set of artefacts, which serves as a basis for every product development project.
Mixed-Method Design for User Behavior Evaluation of Automated Driver Assistance Systems: An Automotive Industry Case
Authors: Orlovska Julia , Novakazi Fjolle , Wickman Casper , Soderberg Rikard
Published: July 2019

Automotive systems are changing rapidly from purely mechanical to smart, programmable assistants. These systems react and respond to the driving environment and communicate with other subsystems for better driver support and safety. However, instead of supporting, the complexity of such systems can result in a stressful experience for the driver, adding to the workload. Hence, a poorly designed system, from a usability and user experience perspective, can lead to reduced usage or even ignorance of the provided functionalities, especially concerning Adaptive Driver Assistance Systems.

In this paper, the authors propose a combined design approach for user behavior evaluation of such systems. At the core of the design is a mixed methods approach, where objective data, which is automatically collected in vehicles, is augmented with subjective data, which is gathered through in- depth interviews with end-users. The aim of the proposed methodology design is to improve current practices on user behavior evaluation, achieve a deeper understanding of driver's behavior, and improve the validity and rigor of the named results.
Patent Classification as Stimulus for Inspiring New Applications of Existing Knowledge
Authors: Fiorineschi Lorenzo , Frillici Francesco Saverio , Rotini Federico
Published: July 2019

This paper aims to provide suggestions for the identification of potential new applications for the existing knowledge. A method is presented for extracting information about a product or technology, processing the international patent database (IPD) and extracting useful hints for potential new applications. The approach uses the Cooperative Patent Classification as stimulus for inspiring new potential fields towards which export existing product or technologies. Although some limits inevitably affect the approach, relevant directions for future developments have been inferred for a more comprehensive exploitation of both the firm internal knowledge and the suggestions provided by the international patent database. The achieved results can support firms in expanding market opportunities for their products or technologies.
Understanding Behavioural Design: Integrating Process and Cognitive Perspectives
Authors: Khadilkar Pramod Ratnakar , Cash Philip
Published: July 2019

Behavioural design is a crucial research area due to its potential in leveraging the positive outcomes of traditional design. Current need for theory building requires discerning the unique characteristics and challenges of behavioural design. To contribute towards this goal, the paper structures the conceptual and operational uniqueness of the behavioural design using the process and cognitive perspective. Process model uses the basic design cycle to discern the tasks and stages of behavioural design. Cognitive perspective uses dual process theory and cognitive strategies used by designers. Integrated model of process and cognitive perspective is the crucial contribution of this paper. A case study involving interview of lead designers from five behavioural design consultancies has been used to present and elaborate the usefulness of the integrated model of behavioural design. Integrated perspective links the process characters like incomplete analysis, simulation and evaluation stages, over reliance on the prescriptive methods, and unequal emphasis to multiple disciplines, with incomplete analytical process, and solution and knowledge driven strategy along cognitive perspective
Data Materialisation: A New Undergraduate Course for a Data Driven Society
Authors: Beghelli Alejandra , Huerta-Cánepa Gonzalo , Segal Ricardo
Published: July 2019

Traditionally, data has been presented in textual format and the interaction with the user confined to the keyboard or touch screen to input data and the screen to deliver information. However, with the advent of a data-driven society, an opportunity for more natural and efficient ways of presenting data and interacting with it has emerged.

Although the area of Human-Computer Interaction has existed for a long time, its focus has always been on the interaction with an artefact (the computer). Today instead, we face the challenge of interacting with an intangible object: data. As a result, a key requirement emerges: How do we make legible the enormous amounts of data produced per day to ordinary people?

Designers, able to devise natural and smooth interaction experiences, should play a relevant role in this new scenario. However, they might lack the basic technical knowledge required to understand the possibilities of these new systems.

In this paper we present a brief how-to manual for an undergraduate course on data materialisation: the process of transforming an intangible object (data) in an artefact that can be interacted with in a physical way.
Designing Risk Management: Applying Value Stream Mapping to Risk Management
Authors: Willumsen Pelle , Oehmen Josef , Rossi Monica
Published: July 2019

Risk management (RM) in new product development (NPD) is often implemented as a standardized framework and ends up being carried out as a tick the box, non-value adding activity. To avoid this problem, RM needs to be tailored to the organization and NPD project. This paper identifies a gap in both understanding and facilitating tailoring, i.e. design of RM systems in NPD. To understand how to design RM systems, we must better understand how RM adds value to NPD activities. We applied Product Development Value Stream Mapping (PDVSM) to RM and conceptualized a Risk Value Stream Mapping (RVSM) framework to support design. Through a state-of-the-art literature review, we identified typical categories of value and waste in RM as well as approaches to model the RM in NPD. We developed and tested components of the RVSM framework based on PDVSM in three case companies. In this paper, results are presented regarding waste, value and potential ways to model the value stream in RM. The framework enables a diagnosis of the current state of RM in companies and supports future design activities pertaining to RM systems. This paper is positioned at the intersection of design, lean thinking and RM
External Technology Searching Methods - A Literature Review
Authors: Kujawa Kate Alexandra , Paetzold Kristin
Published: July 2019

This paper provides a preliminary assessment of the literature available in the field of External Technology Searching. Many methods exist to enable companies to take advantage of new technologies and apply them to achieve a competitive advantage. This literature review focuses on reducing complexity and providing clarity related to the numerous different terms and methodologies used throughout the literature. The main methods found in the literature include: Technology Foresight, Technology Forecasting, Technology Intelligence, and Technology Scouting. However, many additional terms have also been used to describe similar strategies, leading to inconsistency in the use of the terms, resulting in confusion and missed opportunities to innovate for those trying to navigate the field. Synthesis of the results assists in clarifying the differences and conflicts in the literature between the numerous terms. The results serve to display the state of the art on the field and present a basis for further research.
Sprinting Out of Stuckness: Overcoming Moments of Stuckness to Support the Creativity Flow in Agile Team Settings
Authors: Shah Ashni , Huidobro Pereda Alfonso , Gonçalves Milene
Published: July 2019

Multidisciplinary agile teams working in fast paced, delivery-oriented sprint cycles of two weeks can experience moments of stuckness. Typically, these moments can be characterised by the inability to continue, which can be quite detrimental in agile settings, where time is pressured. This paper aims to explore these moments of stuckness, to understand when and why they occur and to understand the different strategies Scrum teams use to overcome them, both on a personal as well as team level. A combination of interviews and observations were conducted with six Scrum team members and two experts to understand their process and experiences while working in an agile set up. We have identified five strategies, which strongly rely on agile values of collaboration, communication, and creativity. These are: looking for expert guidance, open communication, creating spike stories, visual communication and incubation. The findings from this study provide both practice and academia with a deeper understanding into how can creativity be supported in agile settings.
A Survey on the Applications of Machine Learning in the Early Phases of Product Development
Authors: Shabestari Seyed Sina , Herzog Michael , Bender Beate
Published: July 2019

Machine learning has shown its potential to support the knowledge extraction within the development processes and particularly in the early phases where critical decisions have to be made. However, the current state of the research in the applications of the machine learning in the product development are fragmented. A holistic overall view provides the opportunity to analyze the current state of research and is the basis for the strategic planning of future research and the actions needed. Hence, implementing the systematic literature survey techniques, the state of the applications of machine learning in the early phases of the product development process namely the Requirements, functional modelling and principal concept design is reviewed and discussed.
Approaches to Automatically Extract Affordances from Patents
Authors: Chiarello Filippo , Cirri Ilenia , Melluso Nicola , Fantoni Gualtiero , Bonaccorsi Andrea , Pavanello Tommaso
Published: July 2019

The importance of affordance in Engineering design is well established. Artifacts that are able to activate spontaneous and immediate users’ reactions are considered the outcome of good design practice.

A huge effort has been made by researchers for understanding affordances: yet these efforts have been somewhat elusive. In particular, they have been limited to case studies and experimental studies, usually involving a small subset of affordances. No systematic effort has been carried out to list all known affordance effects. This paper offers preliminary steps for such an ambitious effort.

We propose a set of three different approaches of Natural Language Processing techniques to be used to extract meaningful affordance information from the full text of patents: 1) a simple word search, 2) a lexicon of affordances and 3) a rule-based system.

The results give in-depth measures of how rare affordances in patents are, and a fine grain analysis of the linguistical construction of affordances. Finally, we show an interesting output of our method, that has detected affordances for disabled people, showing the ability of our system to automatically collect design-relevant knowledge.
Approaching Knowledge Dynamics Across the Product Development Process with Methods of Social Research
Authors: Wang Wei Min , Mörike Frauke , Hergesell Jannis , Baur Nina , Feufel Markus , Stark Rainer
Published: July 2019

Knowledge is a crucial factor in state-of-the-art product development. It is often provided by stakeholders from divers disciplinary and individual backgrounds and has to be integrated to create competitive products. Still, it is not fully understood, how knowledge is generated, transformed, transferred and integrated in complex product development processes. To investigate the dynamic interrelations between involved stakeholders, applied knowledge types and related artefacts, researchers at the TU Berlin conducted and evaluated a student experiment to study basic phenomena of development projects. In relation to research methods and instruments applied in this experiment, various improvement opportunities were identified. In this paper, the experimental setting and its results are critically analysed from a social science perspective in order to generate improved research design. Based on the results of this analysis, a first set of methods and instruments from social sciences are identified that can be applied in further experiments. The goal is to develop a methodological toolbox that can be used to approach research on knowledge dynamics in product development.
Automatic Identification of Product Usage Contexts from Online Customer Reviews
Authors: Suryadi Dedy , Kim Harrison
Published: July 2019

There are three product design contexts that may significantly affect the design of a product and customer preferences towards product attributes, i.e. customer context, market context, and usage context factors. The conventional methods to gather product usage contexts may be costly and time consuming to conduct. As an alternative, this paper aims to automatically identify product usage contexts from publicly available online customer reviews. The proposed methodology consists of Preprocessing, Word Embedding, and Usage Context Clustering stages. The methodology is applied to identify usage contexts from laptop customer reviews, which results in 16 clusters of usage contexts. Furthermore, analyzing the review sentences explains the separation of “playing games” –which is more related to casual gaming, and “gaming rig” –which implies high computing power requirements. Finally, comparing customer review with manufacturer's product description may reveal a discrepancy to be investigated further by product designer, e.g. a customer suggests a laptop for basic use, although the manufacturer's description describes it for heavy use.
The Construction of Design Science Knowledge Graphs - Based on National Natural Science Foundation of China
Authors: Xu Jiang , Sun Gang , Ou Xifan , Xu Jingyu , Lu Han , Su Pujie , Wei Qiushi , Ding Man
Published: July 2019

In the era of knowledge networking, the structure and production mode of knowledge are constantly changing. This article creatively introduces the knowledge mapping method in design research, and based on the perspective of the National Natural Science Foundation of China (NSFC) to compile literature, uses word frequency analysis, co-word analysis, and citation analysis to construct knowledge graphs of design science. This study graphically shows the distribution and flow law of knowledge within design discipline and probes into the research frontier and evolution trend of Chinese design science.
A Further Exploration of the Three Driven Approaches to Combinational Creativity
Authors: Han Ji , Hua Min , Shi Feng , Childs Peter R. N.
Published: July 2019

Combinational creativity is a significant element of design in supporting designers to generate creative ideas during the early phases of design. There exists three driven approaches to combinational creativity: problem-, similarity- and inspiration-driven. This study provides further insights into the three combinational creativity driven approaches, exploring which approach could lead to ideas that are more creative in the context of practical product design. The results from a case study reveal that the problem- driven approach could lead to more creative and novel ideas or products compared with the similarity- and inspiration-driven approach. Products originating from the similarity- and inspiration-driven approach are at comparable levels. This study provides better understanding of combinational creativity in practical design. It also delivers benefits to designers in improving creative idea generation, and supports design researchers in exploring future ideation methods and design support tools employing the concept of 'combination'.
Conceptual Design of Urban E-Bus Systems with Special Focus on Battery Technology
Authors: Göhlich Dietmar , Fay Tu-Anh , Park Sangyoung
Published: July 2019

Many cities have announced ambitious plans to introduce zero-emission electric bus systems. The transformation process to electric bus systems opens up a vast design space as different charging strategies, charging technologies and battery types are available. Therefore, a profound assessment strategy is necessary to find a “most suitable system solution” under given strategic and operational requirements.

In this study, we present a new methodology for conceptual design of urban electric bus systems. First, the available e-bus technologies are analysed with a special focus on charging systems, battery technology and aging. Relational functional analysis is used to derive a suitable simulation model. Based on the operational requirements, an energetic simulation of the e-bus is carried out, and the required battery capacity is obtained. Subsequently, the design space is reduced by applying a qualitative cost- technology compatibility matrix taking cost and battery aging into account. The applicability of the model is shown for an exemplary realistic operational scenario to identify three most expedient concepts, which are finally validated with an in-depth analysis.
Functional Safety Concept Generation within the Process of Preliminary Design of Automated Driving Functions at the Example of an Unmanned Protective Vehicle
Authors: Graubohm Robert , Stolte Torben , Bagschik Gerrit , Steimle Markus , Maurer Markus
Published: July 2019

Structuring the early design phase of automotive systems is an important part of efficient and successful development processes. Today, safety considerations (e.g., the safety life cycle of ISO 26262) significantly affect the course of development. Preliminary designs are expressed in functional system architectures, which are required to form safety concepts. Thus, mapping tasks and work products to a reference process during early design stages is an important part of structuring the system development. This contribution describes the systematic creation and notation of the functional safety concept within the concept phase of development of an unmanned protective vehicle within the research project aFAS. Different stages of preliminary design and dependencies between them are displayed by the work products created and used. The full set of functional safety requirements and an excerpt of the safety argument structure of the SAE level 4 application are presented.
Using Personas in the Design Process. Towards the Development of Green Product Personality for In-Car User Interfaces
Authors: Wehr Franka , Luccarelli Martin
Published: July 2019

The desire to combine advanced user-friendly interfaces with a product personality communicating environmental friendliness to customers poses new challenges for car interior designers, as little research has been carried out in this field to date. In this paper, the creation of three personas aimed at defining key German car users with pro-environmental behaviour is presented. After collecting ethnographic data of potential drivers through literature review, information about generation and Euro car segment led to the definition of three key user groups. The resulting personas were applied to determine the most important interaction points in car interior. Finally, present design cues of eco-friendly product personality developed in the field of automotive design were explored. Our work presents three strategic directions for the design development of future in-car user interfaces named as a) foster multimodal mobility; b) emphasize the interlinkage economy - sustainable driving; and c) highlight new technological developments. The presented results are meant as an impulse for developers to fit the needs of green customers and drivers when designing user-friendly HMI components.
A Computational Framework for Exploring the Socio-Cognitive Features of Teams and their Influence on Design Outcomes
Authors: Singh Harshika , Cascini Gaetano , Casakin Hernan , Singh Vishal
Published: July 2019

The dynamics of design teams play a critical role in product development, mainly in the early phases of the process. This paper presents a conceptual framework of a computational model about how cognitive and social features of a design team affect the quality of the produced design outcomes. The framework is based on various cognitive and social theories grounded in literature. Agent-Based Modelling (ABM) is used as a tool to evaluate the impact of design process organization and team dynamics on the design outcome. The model describes key research parameters, including dependent, independent, and intermediates. The independent parameters include: duration of a session, number of times a session is repeated, design task and team characteristics such as size, structure, old and new members. Intermediates include: features of team members (experience, learning abilities, and importance in the team) and social influence. The dependent parameter is the task outcome, represented by creativity and accuracy. The paper aims at laying the computational foundations for validating the proposed model in the future.
Supporting the Modelling and Managing of Relations in the Design Platform
Authors: André Samuel , Elgh Fredrik
Published: July 2019

A common strategy which has in many cases become a necessity in product developing companies is to apply platform thinking to some extent. Engineer-to-order (ETO) companies are firms that need to invest in a significant amount engineering time in each product ordered by customers. These companies have in the past been known to not be fully able to apply platform strategies. An area of concern to product development is the design and manufacture of machine tools aimed for part manufacturing which is a large investment and a critical bottle neck. As a response to these challenges the design platform (DP) concept was developed which is founded on the re-use of company assets. This paper aims to investigate the application of the DP in a company designing and producing unique high-pressure die casting tools for different applications and customers. To enable companies of this character to utilize platform thinking to a higher degree and thus increase the efficiency in product development, a focus is set on modelling and managing relations within the DP. In addition, a PDM system setup is proposed together with an integrated support application for the realisation in industry.
Representing the Value Proposition of Product-Service Systems (PSS) in a Value-Based Perspective
Authors: da Costa Fernandes Sânia , Martins Luiza Diegues , Campese Carina , Rozenfeld Henrique
Published: July 2019

Product-service systems (PSS) are being increasingly employed as opportunities to keep innovating. The design of PSS value propositions should focus on the value visualization for stakeholders. However, the PSS representations are still oriented to the customer’ perspective and focus on a process or technological role. This study aims to represent the PSS value proposition in a structured-diagram adapted from the journey map method in combination with the use of the elements of value. A case research was conducted with a high-tech agricultural start-up for representing its value proposition by following a process founded in the practices of journey mapping. Qualitative data analysis was employed to associate the elements of value with the solution, and to verify the consistency of the results. The representation enables the visualization of the stakeholders’ perception regarding the content of the solution as well as the potential value that may be related to it. The experience-centric perspective derived from the journey map associated with the value-related information provides a richer view of the PSS value proposition, which can lead to reflections regarding the solution.