9,747 research outputs found

    Towards the Evolution of Novel Vertical-Axis Wind Turbines

    Full text link
    Renewable and sustainable energy is one of the most important challenges currently facing mankind. Wind has made an increasing contribution to the world's energy supply mix, but still remains a long way from reaching its full potential. In this paper, we investigate the use of artificial evolution to design vertical-axis wind turbine prototypes that are physically instantiated and evaluated under approximated wind tunnel conditions. An artificial neural network is used as a surrogate model to assist learning and found to reduce the number of fabrications required to reach a higher aerodynamic efficiency, resulting in an important cost reduction. Unlike in other approaches, such as computational fluid dynamics simulations, no mathematical formulations are used and no model assumptions are made.Comment: 14 pages, 11 figure

    Towards a systemic research methodology in agriculture: Rethinking the role of values in science

    Get PDF
    The recent drastic development of agriculture, together with the growing societal interest in agricultural practices and their consequences, pose a challenge to agricultural science. There is a need for rethinking the general methodology of agricultural research. This paper takes some steps towards developing a systemic research methodology that can meet this challenge – a general self-reflexive methodology that forms a basis for doing holistic or (with a better term) wholeness-oriented research and provides appropriate criteria of scientific quality. From a philosophy of research perspective, science is seen as an interactive learning process with both a cognitive and a social communicative aspect. This means, first of all, that science plays a role in the world that it studies. A science that influences its own subject area, such as agricultural science, is named a systemic science. From this perspective, there is a need to reconsider the role of values in science. Science is not objective in the sense of being value-free. Values play, and ought to play, an important role in science – not only in form of constitutive values such as the norms of good science, but also in the form of contextual values that enter into the very process of science. This goes against the traditional criterion of objectivity. Therefore, reflexive objectivity is suggested as a new criterion for doing good science, along with the criterion of relevance. Reflexive objectivity implies that the communication of science must include the cognitive context, which comprises the societal, intentional, and observational context. In accordance with this, the learning process of systemic research is shown as a self-reflexive cycle that incorporates both an involved actor stance and a detached observer stance. The observer stance forms the basis for scientific communication. To this point, a unitary view of science as a learning process is employed. A second important perspective for a systemic research methodology is the relation between the actual, different, and often quite separate kinds of science. Cross-disciplinary research is hampered by the idea that reductive science is more objective, and hence more scientific, than the less reductive sciences of complex subject areas – and by the opposite idea that reductive science is necessarily reductionistic. Taking reflexive objectivity as a demarcator of good science, an inclusive framework of science can be established. The framework does not take the established division between natural, social and human science as a primary distinction of science. The major distinction is made between the empirical and normative aspects of science, corresponding to two key cognitive interests. Two general methodological dimensions, the degree of reduction of the research world and the degree of involvement in the research world, are shown to span this framework. The framework can form a basis for transdisciplinary work by way of showing the relation between more and less reductive kinds of science and between more detached and more involved kinds of science and exposing the abilities and limitations attendant on these methodological differences

    Immersive and non immersive 3D virtual city: decision support tool for urban sustainability

    Get PDF
    Sustainable urban planning decisions must not only consider the physical structure of the urban development but the economic, social and environmental factors. Due to the prolonged times scales of major urban development projects the current and future impacts of any decision made must be fully understood. Many key project decisions are made early in the decision making process with decision makers later seeking agreement for proposals once the key decisions have already been made, leaving many stakeholders, especially the general public, feeling marginalised by the process. Many decision support tools have been developed to aid in the decision making process, however many of these are expert orientated, fail to fully address spatial and temporal issues and do not reflect the interconnectivity of the separate domains and their indicators. This paper outlines a platform that combines computer game techniques, modelling of economic, social and environmental indicators to provide an interface that presents a 3D interactive virtual city with sustainability information overlain. Creating a virtual 3D urban area using the latest video game techniques ensures: real-time rendering of the 3D graphics; exploitation of novel techniques of how complex multivariate data is presented to the user; immersion in the 3D urban development, via first person navigation, exploration and manipulation of the environment with consequences updated in real-time. The use of visualisation techniques begins to remove sustainability assessment’s reliance on the existing expert systems which are largely inaccessible to many of the stakeholder groups, especially the general public

    The ethics of responsible acting - a systemic perspective

    Get PDF
    This paper stems from work with research in organic farming, especially the philosophy and methodology of systemic research. In this work, the relations between science and values are pivotal issues of inquiry. The presentation will include the following topics: – sustainability and precautionary acting – conceptions of nature and of the relationship between human and nature – the historical extension of ethics – moral responsibility and moral considerability – moral significance and concepts of value – two paths of extending moral considerability – a cybernetic model of ethical acting – four dimensions of extension of ethics – towards a systemic ethic

    Information Theory Perspective on Modelling Sustainability

    Get PDF
    Sustainability requires integrated models for the description of the co-evolving relationships between the economy, society and nature. The paper argues that information theory as a transdisciplinary approach can provide the basis for new theoretical and practical developments in the modeling of sustainability. The methodological problems of its present paradigms (cybernetic, epistemological and pragmatic) however are currently being challenged by the requirements of sustainability. There is a need for a new approach to modeling based on information theory taking into account the assumptions about the nature of information processes, i.e. that they are real, spontaneous and subject to the principle of information relevance. The new sustainability modeling also needs to include intelligence as an information category. A global green information system (GGIS) is a possible example for the application of these concepts

    Multiple research perspectives as a paradigm to co-create meaningful real-life experiences

    Get PDF

    Towards the Co-evolution of Food Experience Search Spaces Based on the Design Weltanschauung Model in Food Marketing

    Get PDF
    Kamran, Q., Topp, S., & Henseler, J. (2021). Towards the Co-evolution of Food Experience Search Spaces Based on the Design Weltanschauung Model in Food Marketing. Cogent Business and Management, 8(1), 1-23. [1901643]. https://doi.org/10.1080/23311975.2021.1901643Contemporary socio-technological shifts within global societies indicate that the preferences and values of a converging, well-informed and digitally connected society have shifted towards a movement based on sustainability and healthy and environmentally friendly common values. The effect of artificial intelligence has changed the nature of marketing and communication between firms and markets. Food marketers need to adjust to this new situation and integrate proven interdisciplinary theoretical frameworks, as these approaches can be aligned to address this situation. Due to the limitations of traditional-marketing-theory, the field has not captured this gap by addressing emerging trends effectively. We address these new developments by introducing the design of the Weltanschauung model, which is based on marketing within the dimensions of designing a firm-consumer-relationship based on cocreation and coevolution in the design and meaning search spaces. We apply a model-based-management methodology by aligning the nature of rigorous theory building and relevant practice via the design science research.publishersversionpublishe
    corecore