EXPLAINING THE ROLE OF SERVICE-ORIENTED ARCHITECTURE FOR CYBER-PHYSICAL SYSTEMS BY ESTABLISHING LOGICAL LINKS

In the context of the so-called fourth industrial revolution, cyber-physical systems (CPS) build the technological foundation for the increasing digitalisation of our world. Because guidelines to overcome challenges of building such systems (e.g. security concerns, missing know-how, and lack of standards) are scarce, researchers and practitioners alike have begun to analyse the role of the mature paradigm of service-oriented architecture (SOA) in implementing CPS. However, the relationship between SOA and CPS is not entirely understood. To close this gap, we analyse SOA’s role for CPS based on a concept-driven literature review. The analysis of 12 publications that address the interrelation between SOA and CPS yielded four groups of CPS benefits that can be achieved by leveraging SOA. Combining these benefits with architectural layers and SOA’s design principles, we identify logical links that explain the role of SOA for CPS. Future research might concentrate on dominant patterns to scrutinise how a specific benefit can be achieved by leveraging SOA. Designers of CPS can leverage the identified patterns to understand the importance of specific characteristics of SOA to address the unique requirements of their CPS

Opening the black box of knowledge management mechanisms: exploring knowledge flows at a consultancy

Purpose – Based on an exploratory case-based approach, the purpose of this paper is to open the KM black box and examine the relationships that link knowledge management (KM) inputs (i.e. knowledge resources and KM practices) via knowledge processes to KM performance. This paper aims to identify the underlying mechanisms and explain how KM performance is enabled. Design/methodology/approach – This in-depth case study conducted at a medium-sized consultancy in the supply chain management industry empirically examines knowledge flows to uncover the relationships between KM inputs, knowledge processes and KM performance. We adopt the viable system model (VSM) as a theoretical lens to identify KM mechanisms. Findings – By identifying six KM mechanisms, we contribute to the theoretical understanding of how KM inputs are interconnected and lead to KM performance via knowledge processes. Originality/value – Based on the insights gained, we provide propositions that organizations should consider in designing viable KM. Our findings help organizations in understanding their KM with the help of knowledge flow analysis and identifying how critical KM elements are interconnected

Influence of the Polymer Structure and its Crystallization on the Interface Resistance in Polymer-LATP and Polymer-LLZO Hybrid Electrolytes

For many years, composite electrolytes (CEs) consisting of a mixture of inorganic solid electrolytes (ISEs) and polymer electrolytes (PEs) have been investigated as promising materials for the scalable production of solid-state batteries (SSBs). It is believed that CEs can overcome limitations of the single components, namely the low room-temperature conductivity and lithium ion transference number of PEs and the poor mechanical properties and high temperature processing necessary for ISE ceramics. To facilitate ion transport in the CE between the electrodes a low and stable charge transfer resistance between PEs and ISEs is required. In this study, we investigate by means of electrochemical impedance spectroscopy (EIS) how polymer crystallinity influences the charge-transfer resistance of hetero-ionic interfaces between polyethylene oxide (PEO)-based electrolytes and Li$_{1.5}$Al$_{0.5}$Ti$_{1.5}$(PO$_4$)$_3$ (LATP) as well as Li$_{6.25}$Al$_{0.25}$La$_3$Zr$_2$O$_{12}$ (LLZO) as ISEs. Crystallization of PEO based electrolytes below their melting temperature leads to an increased charge-transfer resistance. On the other hand, electrolytes based on the amorphous poly[2-(2-(2-methoxyethoxy)ethoxy)ethyl glycidyl ether (PTG) do not show an increased charge transfer resistance. Finally, the conductivity of ISE-rich CEs is measured as a function of their temperature and composition for elucidating how the interface resistance influences charge transport in ISE-rich composite electrolytes

Towards Mindful Case Study Research in IS: A Critical Analysis of the Past Ten Years

Case study research (CSR) has gained strong acceptance in information systems (IS) research in the recent decades. This article examines how CSR has been used in IS research practice. Contrasting the currently used CSR approaches to methodological prescriptions can lead to recommendations for researchers applying this research strategy as well as to advances in the methodological literature. Our study design comprises two steps. First, we identified case studies published in six major IS journals from 2001 to 2010. Second, we critically examined CSR practices in the identified studies. We observed a dualism, as CSR currently consists of a positivist and an equally strong interpretive research stream. Case studies with other philosophical underpinnings were rarely found. We describe the CSR practice and contrast it to the methodological prescriptions. Thereby, we clearly point out the shortcomings, aiming to initiate a debate on how our community should further develop its use of CSR to become more mindful. This study is the first broad examination of CSR in IS (focusing on more than just the positivist research stream) and thus contributes to the methodological literature by providing recommendations for improvements

A Three-pronged View on Organizational Agility

The ability of organizations to sense and respond to changes–defined as organizational agility–is considered by senior executives among their top information technology (IT) concerns as an important ability for organizations on their quest toward sustainedcompetitive advantage. However, every transformation toward agility also comes at a cost, requiring resource commitment and IT landscape changes. We present examples of successful and unsuccessful attempts at achieving agility while leveraging IT. Our presented cases focus on information systems development agility, customer agility, and entrepreneurial agility. Our findings suggest that agility is neither achieved easily, nor is a guarantor for success.Depending on the context and implementation of organizational agility, however, it can significantly improve process and product performance. We develop a three-pronged viewconsisting of a functional,temporal,andambidextrous viewtoresolve thesechallenges. We end with three recommendations for practitioners that seek to shape their organization’s journey toward agility

A Three-pronged View on Organizational Agility

The ability of organizations to sense and respond to changes–defined as organizational agility–is considered by senior executives among their top information technology (IT) concerns as an important ability for organizations on their quest toward sustained competitive advantage. However, every transformation toward agility also comes at a cost, requiring resource commitment and IT landscape changes. We present examples of successful and unsuccessful attempts at achieving agility while leveraging IT. Our presented cases focus on information systems development agility, customer agility, and entrepreneurial agility. Our findings suggest that agility is neither achieved easily, nor is a guarantor for success. Depending on the context and implementation of organizational agility, however, it can significantly improve process and product performance. We develop a three-pronged view consisting of a functional, temporal, and ambidextrous view to resolve these challenges. We end with three recommendations for practitioners that seek to shape their organization’s journey toward agility

Working Principle of an Ionic Liquid Interlayer During Pressureless Lithium Stripping on Li6.25_{6.25}Al0.25_{0.25}La3_{3}Zr2_{2}O12_{12} (LLZO) Garnet-Type Solid Electrolyte

Solid-state-batteries employing lithium metal anodes promise high theoretical energy and power densities. However, morphological instability occurring at the lithium/solid–electrolyte interface when stripping and plating lithium during cell cycling needs to be mitigated. Vacancy diffusion in lithium metal is not sufficiently fast to prevent pore formation at the interface above a certain current density during stripping. Applied pressure of several MPa can prevent pore formation, but this is not conducive to practical application. This work investigates the concept of ionic liquids as “self-adjusting” interlayers to compensate morphological changes of the lithium anode while avoiding the use of external pressure. A clear improvement of the lithium dissolution process is observed as it is possible to continuously strip more than 70 μm lithium (i. e., 15 mAh cm$^{−2}$ charge) without the need for external pressure during assembly and electrochemical testing of the system. The impedance of the investigated electrodes is analyzed in detail, and contributions of the different interfaces are evaluated. The conclusions are corroborated with morphology studies using cryo-FIB-SEM and chemical analysis using XPS. This improves the understanding of the impedance response and lithium stripping in electrodes employing liquid interlayers, acting as a stepping-stone for future optimization