9,195 research outputs found
A Design Science Research Approach to Smart and Collaborative Urban Supply Networks
Urban supply networks are facing increasing demands and challenges and thus constitute a relevant field for research and practical development. Supply chain management holds enormous potential and relevance for society and everyday life as the flow of goods and information are important economic functions. Being a heterogeneous field, the literature base of supply chain management research is difficult to manage and navigate. Disruptive digital technologies and the implementation of cross-network information analysis and sharing drive the need for new organisational and technological approaches. Practical issues are manifold and include mega trends such as digital transformation, urbanisation, and environmental awareness.
A promising approach to solving these problems is the realisation of smart and collaborative supply networks. The growth of artificial intelligence applications in recent years has led to a wide range of applications in a variety of domains. However, the potential of artificial intelligence utilisation in supply chain management has not yet been fully exploited. Similarly, value creation increasingly takes place in networked value creation cycles that have become continuously more collaborative, complex, and dynamic as interactions in business processes involving information technologies have become more intense.
Following a design science research approach this cumulative thesis comprises the development and discussion of four artefacts for the analysis and advancement of smart and collaborative urban supply networks. This thesis aims to highlight the potential of artificial intelligence-based supply networks, to advance data-driven inter-organisational collaboration, and to improve last mile supply network sustainability. Based on thorough machine learning and systematic literature reviews, reference and system dynamics modelling, simulation, and qualitative empirical research, the artefacts provide a valuable contribution to research and practice
Reinforcement Learning-based User-centric Handover Decision-making in 5G Vehicular Networks
The advancement of 5G technologies and Vehicular Networks open a new paradigm for Intelligent Transportation Systems (ITS) in safety and infotainment services in urban and highway scenarios. Connected vehicles are vital for enabling massive data sharing and supporting such services. Consequently, a stable connection is compulsory to transmit data across the network successfully. The new 5G technology introduces more bandwidth, stability, and reliability, but it faces a low communication range, suffering from more frequent handovers and connection drops. The shift from the base station-centric view to the user-centric view helps to cope with the smaller communication range and ultra-density of 5G networks. In this thesis, we propose a series of strategies to improve connection stability through efficient handover decision-making. First, a modified probabilistic approach, M-FiVH, aimed at reducing 5G handovers and enhancing network stability. Later, an adaptive learning approach employed Connectivity-oriented SARSA Reinforcement Learning (CO-SRL) for user-centric Virtual Cell (VC) management to enable efficient handover (HO) decisions. Following that, a user-centric Factor-distinct SARSA Reinforcement Learning (FD-SRL) approach combines time series data-oriented LSTM and adaptive SRL for VC and HO management by considering both historical and real-time data. The random direction of vehicular movement, high mobility, network load, uncertain road traffic situation, and signal strength from cellular transmission towers vary from time to time and cannot always be predicted. Our proposed approaches maintain stable connections by reducing the number of HOs by selecting the appropriate size of VCs and HO management. A series of improvements demonstrated through realistic simulations showed that M-FiVH, CO-SRL, and FD-SRL were successful in reducing the number of HOs and the average cumulative HO time. We provide an analysis and comparison of several approaches and demonstrate our proposed approaches perform better in terms of network connectivity
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Co-design As Healing: Exploring The Experiences Of Participants Facing Mental Health Problems
This thesis is an exploration of the healing role of co-design in mental health. Although co-design projects conducted within mental health settings are rising, existing literature tends to focus on the object of design and its outcomes while the experiences of participants per se remain largely unexplored. The guiding research question of this study is not how we design things that improve mental health, but how co-designing, as an act, might do so.
The thesis presents two projects that were organized in collaboration with the mental health charity Islington Mind and the Psychosis Therapy Project (PTP) in London.
The project at Islington Mind used a structured design process inviting participants to design for wellbeing. A case study analysis provides insights on how participants were impacted, summarizing key challenges and opportunities.
The design at PTP worked towards creating a collective brief in an emergent fashion, finally culminating in a board game. The experiences of participants were explored through Interpretative Phenomenological Analysis (IPA), using semi-structured interview data. The analysis served to identify key themes characterising the experience of co-design such as contributing, connecting, thinking and intentioning. In addition, a mixed-methods analysis of questionnaires and interview data exploring participants' wellbeing, showed that all participants who engaged fairly consistently in the project improved after the project ended, although some participants' scores returned to baseline six months later.
Reflecting on both projects, an approach to facilitation within mental health is outlined, detailing how the dimensions of weaving and layered participation, nurturing mattering and facilitating attitudes interlace. This contribution raises awareness of tacit dimensions in the practice of facilitation, articulating the nuances of how to encourage and sustain meaningful and ethical engagement and offering insights into a range of tools. It highlights the importance of remaining reflexive in relation to attitudes and emotions and discusses practical methodological and ethical challenges and ways to resolve them which can be of benefit to researchers embarking on a similar journey.
The thesis also offers detailed insights on how methodologies from different fields were integrated into a whole, arguing for transparency and reflexivity about epistemological assumptions, and how underlying paradigms shift in an interdisciplinary context.
Based on the overall findings, the thesis makes a case for considering design as healing (or a designerly way of healing), highlighting implications at a systems, social and individual level. It makes an original contribution to our understanding of design, highlighting its healing character, and proposes a new way to support mental health. The participants in this study not only had increased their own wellbeing through co-designing, but were also empowered and contributed towards healing the world. Hence, the thesis argues for a unique, holistic perspective of design and mental health, recognizing the interconnectedness of the individual, social and systemic dimensions of the healing processes that are ignited
Embodying entrepreneurship: everyday practices, processes and routines in a technology incubator
The growing interest in the processes and practices of entrepreneurship has
been dominated by a consideration of temporality. Through a thirty-six-month
ethnography of a technology incubator, this thesis contributes to extant
understanding by exploring the effect of space. The first paper explores how
class structures from the surrounding city have appropriated entrepreneurship
within the incubator. The second paper adopts a more explicitly spatial analysis
to reveal how the use of space influences a common understanding of
entrepreneurship. The final paper looks more closely at the entrepreneurs within
the incubator and how they use visual symbols to develop their identity. Taken
together, the three papers reject the notion of entrepreneurship as a primarily
economic endeavour as articulated through commonly understood language and
propose entrepreneuring as an enigmatic attractor that is accessed through the
ambiguity of the non-verbal to develop the ânewâ. The thesis therefore contributes
to the understanding of entrepreneurship and proposes a distinct role for the non-verbal in that understanding
The company she keeps : The social and interpersonal construction of girls same sex friendships
This thesis begins a critical analysis of girls' 'private' interpersonal and social relations as they are enacted within two school settings. It is the study of these marginal subordinated worlds productivity of forms of femininity which provides the main narrative of this project. I seek to understand these processes of (best) friendship construction through a feminist multi-disciplinary frame, drawing upon cultural studies, psychoanalysis and accounts of gender politics. I argue that the investments girls bring to their homosocial alliances and boundary drawing narry a psychological compulsion which is complexly connected to their own experiences within the mother/daughter bond as well as reflecting positively an immense social debt to the permissions girls have to be nurturant and ; negatively their own reproduction of oppressive exclusionary practices. Best friendship in particular gives girls therefore, the experience of 'monogamy' continuous of maternal/daughter identification, reminiscent of their positioning inside monopolistic forms of heterosexuality. But these subcultures also represent a subversive discontinuity to the public dominance of boys/teachers/adults in schools and to the ideologies and practices of heterosociality and heterosexuality. By taking seriously their transmission of the values of friendship in their chosen form of notes and diaries for example, I was able to access the means whereby they were able to resist their surveillance and control by those in power over them. I conclude by arguing that it is through a recognition of the valency of these indivisiblly positive and negative aspects to girls cultures that Equal Opportunities practitioners must begin if they are serious about their ambitions. Methods have to be made which enable girls to transfer their 'private' solidarities into the 'public' realm, which unquestionably demands contesting with them the causes and consequences of their implication in the divisions which also contaminate their lives and weaken them
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Locative narratives and storied cities
This article provides three perspectives on the genesis of a book of flash fiction about the city. It is written by the three co-editors, who also contributed flash fiction stories to the book. Their aim for the book was to facilitate reading as a narrative spatial practice. Both the stories and the book itself were designed and edited to encourage readers to take the book into the city and read the stories in situ, facilitating a shared conversation between the reader, the printed page and the environment. Each co-editor, one of whom originally conceived the project, the second of whom is also the bookâs designer, and the third of whom commissioned and published the book, provides their individual critical reflections on both context and process. They discuss the particular theories of space, narrative and book design on which the project draws, including Bakhtinâs notion of the literary chronotope, Seamonâs concept of âplace-balletsâ and Hochuli and Kinrossâs discussion of the âphysical presence of the [book] object.â They elaborate on the relationship of these theories to specific writing, design and editing practices employed in the project, which are also discussed in some detail
Vulnerability, decision-making and the protection of prisoners in Scotland and England
Vulnerable and protection prisoners currently make up a sizeable proportion of the prison populations in England and Scotland, and designated physical space to house them, an approach that has developed significantly in both countries since the 1960s, remains under studied. Within research on prisons, vulnerability has been predominantly associated with risks to the self, for example, mental health problems, self-harm and suicide, internal vulnerabilities that prisoners either bring into an establishment or which are a consequence of the stressors of prison life. This literature further tends to focus on certain categories of prisoner, namely those who have committed sexual crimes. This framing of vulnerability in prison means academic research typically studies vulnerability as a settled status, and there has been a move away from exploring meanings, experiences and determinations of vulnerability as these arise and change at different points of a personâs journey through prison. This study addresses these gaps by sharing the perspectives directly from those at risk of victimization in prison as well as from those in charge of deciding who will get protection from risks. The focus is on prisoner and staff decisions to relocate to protective housing (vulnerable prisoner units (VPU) in England and protection halls in Scotland).
This research utilised qualitative methods, interviewing staff (13) involved in designating or managing vulnerability in prison as well as prisoners (23) who had been identified as needing protective housing. The research was conducted in one prison in England and two prisons in Scotland. It highlights the significant levels of victimization, trauma and fear experienced by prisoner research participants, and in doing so complicates prevailing ideas of vulnerability in prison. The findings chapters show: staff perspectives on what counts as a valid basis of vulnerability and therefore how it is managed and to some extent rationed (Chapter 5); the importance of journeys into and through prisons which shape and intensify experiences of vulnerability (Chapter 6); the perspectives of prisoners housed in a VPU in England which reinforced the idea that vulnerability is fluid and that there are some common factors affecting decisions to relocate from mainstream wings, but ultimately each decision is situated in the personal circumstances of an individual (Chapter 7); the perspectives of prisoners housed in protection halls in Scotland highlighting the factors that influence decisions to seek out or resist protective accommodation where, like England, common factors influenced decisions but were situated in highly individual circumstances (Chapter 8), and how these feelings were managed. The conclusion (Chapter 9) summarises key findings and calls for a sociology of the vulnerable prisoner (building on a conceptualisation of vulnerability in Chapter 3) to understand not only how they navigate risk from others and the prison itself, but how they make sense of their newly acquired yet further stigmatized identity. Finally, it sets out some implications and suggestions for policy based on its new contribution to a sociology of vulnerability
Adaptive task selection using threshold-based techniques in dynamic sensor networks
Sensor nodes, like many social insect species, exist in harsh environments in large groups, yet possess very limited amount of resources. Lasting for as long as possible, and fulfilling the network purposes are the ultimate goals of sensor networks. However, these goals are inherently contradictory. Nature can be a great source of inspiration for mankind to find methods to achieve both extended survival, and effective operation. This work aims at applying the threshold-based action selection mechanisms inspired from insect societies to perform action selection within sensor nodes. The effect of this micro-model on the macro-behaviour of the network is studied in terms of durability and task performance quality. Generally, this is an example of using bio-inspiration to achieve adaptivity in sensor networks
Description assistée d'un environnement intelligent en réalité augmentée
Les technologies d'assistance modernes offrent d'augmenter, de maintenir ou d'améliorer les capacités fonctionnelles d'une personne avec incapacités. Parmi ces technologies, les environnements intelligents favorisent effectivement le maintien à domicile des personnes ùgées.
Pourtant, les taux d'abandon des technologies d'assistance sont aujourd'hui Ă©levĂ©s. L'absence d'inclusion de l'utilisateur dans la construction et la personnalisation de ces technologies est fortement pointĂ©e du doigt par la littĂ©rature. Un systĂšme fait soi-mĂȘme (Do-it-Yourself) centrĂ© sur le partage et oĂč l'utilisateur conçoit lui-mĂȘme son assistance est donc Ă privilĂ©gier.
Cette thÚse s'intéresse à développer les interactions entre l'humain et l'intelligence artificielle pour la description assistée d'environnements intelligents personnalisés selon les habitudes du résident. Le but est de déterminer les interfaces et le langage à adopter pour favoriser l'échange entre un descripteur humain, expert des besoins du résident, et une intelligence artificielle, experte des environnements intelligents.
Les habitudes que le descripteur doit transmettre au systÚme d'assistance sont spatialisées par définition, elles prennent place à des endroits spécifiques de l'environnement, avec des objets spécifiques de cet environnement et à des moments précis. La réalité augmentée s'inscrit ainsi parfaitement dans cette approche puisqu'elle permet d'ancrer dans le monde réel les éléments virtuels représentant l'environnement et les habitudes dans celui-ci.
Les habitudes que le descripteur détaille sont également spécifiques à la façon de faire du résident tandis que les connaissances des environnements intelligents de l'intelligence artificielle proposée sont davantage génériques. Aussi, un langage compréhensible par l'humain et assez puissant pour représenter à la fois ces concepts spécifiques et génériques est nécessaire. Les ontologies, base de données sémantiques, répondent à ces besoins grùce à leur représentation textuelle et au raisonnement ontologique qui permet de définir le niveau d'abstraction adéquat pour l'échange.
En combinant la réalité augmentée à la sémantique, le conseiller virtuel de description assistée des environnements intelligents présenté dans cette thÚse accompagne le descripteur dans la spécification des habitudes du résident. De plus, en agrégeant l'expérience acquise avec l'ensemble des descriptions précédentes, ce conseiller fournit des conseils en temps-réel pour favoriser l'idéation.
Ce conseiller virtuel a été testé auprÚs d'experts et de proches aidants. Les résultats obtenus confirment que le conseiller virtuel proposé permet la description de l'environnement et des activités, notamment grùce à ses interactions intuitives et naturelles.
Les habitudes numérisées avec le conseiller virtuel pourraient à terme permettre à l'environnement intelligent de mieux comprendre les besoins de son résident et de s'y adapter
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