Chapter 28 - Case studies in design

A case study in interface design The CHI'89 Information Kiosk

Chip reliability becomes a great threat to the design of future microelectronic systems with the continuation of the progressive downscaling of CMOS technologies. Hence increasing the robustness of chip implementations in terms of error tolerance becomes an important issue. In this paper we present a case study in reliability-aware design tolerating transient errors. A state-of-the-art WiMAX channel decoder for LDPC codes is investigated on all design levels to increase its reliability for a given system performance with minimum hardware overhead. We show that an efficient exploitation of the algorithmic fault-tolerance yields a fairly small area overhead with nearly no degradation in communications performance even under high error injection rates.

The MATLAB M language provides constructs for the simple representation of functions, and has been used extensively for algorithm development and verification in embedded system design. The M language processes entire arrays simultaneously, and it is expected that design based on M can be implemented faster and with the same or higher quality as compared with design based on other languages. This paper presents a case study of a design of a filter for signal processing using M-based design flow. The results of the case study demonstrate the high efficiency of the M-based design flow as compared to traditional functional modeling and manual coding using a hardware description language.

Although originally motivated by applications such as image processing, multidimensional (nD) systems have mainly attracted the attention of the research community due to the richness of new theoretical questions raised by their treatment, and are often replaced by other settings when it comes to modelling, identifying and controlling processes in practical situations. The aim of this special issue is to illustrate the application potential of nD systems by presenting several contributions where the nD framework is successfully used either to deal with practical problems or to solve practically relevant questions that arise in other contexts that are not at first sight related to multidimensional systems. In the paper Multidimensional Control Systems: Case Studies in Design and Evaluation, by Rogers et al., after introducing the most commonly used models for the analysis and control of discrete nD linear systems, a series of case studies is presented with the aim of demonstrating the advantages of the nD systems approach in solving certain control problems. Namely, applications in the fields of sensor grid networks, iterative learning control, civil engineering and agriculture are considered. The paper Two-dimensional Generalized Predictive Control (2D-GPC) Scheme for the Batch Processes with Two-dimensional (2D)Dynamics, Shi et al. studies the problem of iterative learning control (ILC) design for batch processes. Based on 2Dcontrolled auto-regressive moving average (2D-CARMA) model, a novel two-dimensional generalized predictive control (2D-GPC) is proposed. The feasibility and effectiveness of the proposed method is validated by the experimental results on packing pressure control of the injection molding process.

Case study in design and transient analysis of hydrogen-propelled aircraft using direct combustion

This paper summarizes various aspects of identifying and using biological analogies in engineering design. To avoid the immense as well as potentially biased task of creating a database specifically for this purpose, the chosen approach searches biological knowledge in natural language format, e.g., books, papers, etc., for instances of functional keywords describing the engineering problem. Strategies developed to facilitate this search as well how text descriptions of biological phenomena were used in problem solving are summarized. Case studies in design for remanufacture and microassembly are used to provide an overview of the method.

Performance evaluation of collaboration in the design process: Using interoperability measurement

Transcript Auto scroll search expand close Search Transcript Search Up Search Down Close Search Tools Tools icon close Download PDFopens in new window Cite Cite icon close Format APA APA Chicago Harvard MLA AMA Mabasa, T., & Themane, M. (Academics). (2023). Using a case study design during the covid-19 pandemic [Video]. Sage Research Methods. https://doi.org/10.4135/9781529627794 Mabasa, Thomas, and Mahlapahlapana Themane. "Using A Case Study Design During The COVID-19 Pandemic." In Sage Video. : SAGE Publications, Ltd., 2023. Video, 00:17:02. https://doi.org/10.4135/9781529627794. Mabasa, T. and Themane, M., 2023. Using A Case Study Design During The COVID-19 Pandemic, Sage Video. [Streaming Video] London: Sage Publications Ltd. Available at: <https://doi.org/10.4135/9781529627794 & gt; [Accessed 16 Mar 2023]. Mabasa, Thomas and Mahlapahlapana Themane. Using A Case Study Design During The COVID-19 Pandemic. Online video clip. SAGE Video. London: SAGE Publications, Ltd., 15 Nov 2022. doi: https://doi.org/10.4135/9781529627794. 16 Mar 2023. Using A Case Study Design During The COVID-19 Pandemic [Streaming video]. 2023. doi:10.4135/9781529627794. Accessed 03/16/2023 copy to clipboard or Export to your reference manager Endnote Endnote Reference Manager ProCite RefWorks BibTeX Zotero Medlars Mendeley Word Export Cancel Share Share icon close Share via Email Please log in from an authenticated institution or log into your member profile to access the email feature. Sign in/register Embed Embed icon close Embed this Content Add this content to your learning management system or webpage by copying the code below into the HTML editor on the page. Look for the words HTML or </>. Learn More about Embedding Video icon link (opens in new window) Clip - https://methods.sagepub.com/video/using-a-case-study-design-during-the-covid-19-pandemic Embed code: Copy to clipboard Select a length: Entire video Entire video Select a size: 420x236 640x360 853x480 Sample View: (opens in new window) Cancel Get link Get link icon close Select a length: Entire video Entire video Link to this page directly with a permalink: https://methods.sagepub.com/video/using-a-case-study-design-during-the-covid-19-pandemic Copy to clipboard Cancel

One of the most highly cited papers in management is Eisenhardt’s (Acad Manag Rev 14(4):532–550, 1989) piece on the importance of case study research, in particular multiple cases (versus single cases), for theory building. We focus on this distinction between multiple versus single cases in the context of rigor and impact of management case studies (N = 173) published during the period 1996–2006 in Academy of Management Journal, Administrative Science Quarterly, Organization Science, and Strategic Management Journal. We find that this distinction of multiple versus single only crudely captures the reality of case study designs in published article. For this we propose an alternative empirical classification of case study design that is replication and non-replication, in which case studies using a replication logic either in single cases (e.g. comparing teams within an organization, where the case is the organization) or, indeed, multiple cases (e.g. comparing teams across multiple organizations) are more rigorous and also more impactful than cases who do not use replication logic. However, unlike in quantitative research, rigor is not a driver of article citations in qualitative studies. In this regard, our finding makes important contributions to scientrometric research by discussing criteria under which different case study designs can be rigorous and impactful.

Chapter 7 - Case Studies in Modulus-Limited Design

Ergonomics is the study of designing more human-friendly products, systems or processes for human. By extending this concept to robotics field, we propose robot ergonomics which is a transdisciplinary approach that brings together roboticists, product designers, and architects to solve numerous unsettled research problems or technology bottlenecks in robotics community through designing products for robots. This paper focuses on a case study of chair design for Roomba. Seven design criteria are proposed and intensive experiments are performed to validate the criteria using 22 chairs. Based on such empirical design strategy, three generic principles (i.e., observability, accessibility, and safety) of chair design are extracted for Roomba.

The rapid development of rural societies mixed with the infrastructural transformation of emerging economies bring both challenges and opportunities to Human-Computer Interaction (HCI) design as illustrated through the emergence of the field of HCI for Development (HCI4D). A key challenge for HCI4D is how local knowledge, expertise, and culture can be constructively combined with global trends in digital innovation and socioeconomic development. Co-design and participatory design practices in HCI offer opportunities to engage diverse communities in design activities which embrace both transition and tradition in constructive ways. We present our co-design framework, Qi2He, which supports designers and local communities engaging in co-design activities. Qi2He is inspired by traditional Chinese epistemology and contributes (i) methods to support cross-cultural co-design engagement, and (ii) post-hoc critique of co-design participation. We illustrate the use of Qi2He through three case studies of HCI design over four years in rural China where local culture and traditions are in a state of flux from waves of migration to cities whilst also being an integral part of the broader national and global transformation. The first case study examines how local rural knowledge can be shared and acquired to create a design system for ethnic brocade production. The second case study explores how the creation of an interactive drama can be used as a driver for rural community engagement. The third case study focusses on the iterative design of cross-cultural interactive product innovation. We conclude by reflecting on lessons we learnt when structuring and restructuring our co-design process and offer suggestions for how our Qi2He framework could be used by others and in different cultural settings.

Introduction In this chapter I discuss four tests that assess vocabulary knowledge as case studies of test design and validation. I have referred to all four of them in earlier chapters, especially Chapter 4, and so the case studies give me the opportunity to explore issues raised earlier in greater depth, in relation to particular well-known language tests. The four tests are: The Voluntary Levels Test; The Eurocentres Vocabulary Size Test (EVST); The Vocabulary Knowledge Scale (VKS); and The Test of English as a Foreign Language (TOEFL) These tests do not represent the full range of measures covered by the three dimensions of vocabulary assessment which I presented in Chapter 1. Three of them are discrete, context-independent tests and all four are selective rather than comprehensive. However, I have chosen them because they are widely known and reasonably well documented in the literature. More specifically, there is research evidence available concerning their validity as assessment procedures for their intended purpose. They also represent innovations in vocabulary assessment and serve to highlight interesting issues in test design. However, there is a limited number of instruments that I could have considered for inclusion as case studies in this chapter, which reflects the fact that, despite the upsurge in second language vocabulary studies since the early 1980s, the design of tests that could function as standard instruments for research or other assessment purposes has been a neglected area.

The case study method, and in particular the multiple–case studies design, offers LIS researchers a proven tool for achieving a deep understanding of a specific phenomenon—-for example, the information-seeking behavior of a particular user group. Although the case study method has been dismissed by critics who question the rigor of the approach, numerous studies over the past twenty years have demonstrated that the case study method can be used successfully to probe beneath the surface of a situation and to provide a rich context for understanding the phenomena under study. This article summarizes the application of the multiple–case studies design, in which a literal and theoretical replication strategy is used to identify consistent patterns of behavior and to uncover new and/or divergent themes. The motivation behind arts administrators' decisions to seek information is investigated using this approach and examples are given of sample selection, data collection, and analysis. Specific issues associated with the case study method are identified and practical steps used to address them are suggested.

This chapter introduces a method of design evaluation based on technical merit. With the aim of supporting decision making from the early stages of the design process, technical merit is a measure of the proximity of a product to forecast limits of performance, reliability and economy. The accuracy of the calculations and forecasts are used to define a measure of risk. The chapter is divided into the following sections. Section 22.1 provides a background for Design for Technical Merit and briefly introduces some current evaluation techniques. In section 22.2, ideas drawn from these techniques are combined with a generic model of system development to define technical merit and methods for its calculation. Sections 22.3 and 22.4 outline a case study in design for technical merit, using a manual method and a computer-based tool, respectively.