4,322 research outputs found
Innovation Clusters: Combining Physical and Virtual Links
Innovation is increasingly seen as a collective action which involves many different actors operating in a cluster context. These clusters are usually conceived as local agglomerations. In this paper it will be argued that they are an important tool to study innovation, but the globalisation of companies and markets and the specific requirements of innovation processes require the expansion of cluster concepts towards virtual dimensions. It will be shown that the combination of local and virtual cluster links improves access to essential resources in innovation. An examples taken from the automotive component sector will illustrate the concept.Innovation, cluster dynamics, automotive components.
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Automated Additive Construction (AAC) for Earth and Space Using In-situ Resources
Using Automated Additive Construction (AAC), low-fidelity large-scale compressive structures can be produced out of a wide variety of materials found in the environment. Compressionintensive structures need not utilize materials that have tight specifications for internal force management, meaning that the production of the building materials do not require costly methods for their preparation. Where a certain degree of surface roughness can be tolerated, lower-fidelity numerical control of deposited materials can provide a low-cost means for automating building processes, which can be utilized in remote or extreme environments on Earth or in Space. For space missions where every kilogram of mass must be lifted out of Earthâs gravity well, the promise of using in-situ materials for the construction of outposts, facilities, and installations could prove to be enabling if significant reduction of payload mass can be achieved. In a 2015 workshop sponsored by the Keck nstitute for Space Studies, on the topic of Three Dimensional (3D) Additive Construction For Space Using In-situ Resources, was conducted with additive construction experts from around the globe in attendance. The workshop explored disparate efforts, methods, and technologies and established a proposed framework for the field of Additive Construction Using In-situ Resources.
This paper defines the field of Automated Additive Construction Using In-situ Resources, describes the state-of-the-art for various methods, establishes a vision for future efforts, identifies gaps in current technologies, explores investment opportunities, and proposes potential technology demonstration missions for terrestrial, International Space Station (ISS), lunar, deep space zero-gravity, and Mars environments
Domestic capabilities and global production networks in the clothing industry: a comparison of German and UK firms' strategies
In this paper we examine the sourcing strategies of clothing firms in the developed economies of the UK and Germany in the context of their national institutional framework. We argue that, as a result of their embeddedness in divergent national structures, these firms pursue different sourcing strategies and make different locational choices. We place particular emphasis on the different mix of armsĂ length and relational contracting that firms develop, and on the divergent degree of control over the manufacturing process and the product that they retain. We suggest that the construction of global production networks and control over supplier firms is mediated by co-ordinating firmsĂ product strategy and the degree of dependence on national retailers this engenders. In the UK and Germany, firms and their networks differ from the US case which is normally taken as representative of the industry.clothing industry, global production networks, capabilities
Tele-autonomous systems: New methods for projecting and coordinating intelligent action at a distance
There is a growing need for humans to perform complex remote operations and to extend the intelligence and experience of experts to distant applications. It is asserted that a blending of human intelligence, modern information technology, remote control, and intelligent autonomous systems is required, and have coined the term tele-autonomous technology, or tele-automation, for methods producing intelligent action at a distance. Tele-automation goes beyond autonomous control by blending in human intelligence. It goes beyond tele-operation by incorporating as much autonomy as possible and/or reasonable. A new approach is discussed for solving one of the fundamental problems facing tele-autonomous systems: The need to overcome time delays due to telemetry and signal propagation. New concepts are introduced called time and position clutches, that allow the time and position frames between the local user control and the remote device being controlled, to be desynchronized respectively. The design and implementation of these mechanisms are described in detail. It is demonstrated that these mechanisms lead to substantial telemanipulation performance improvements, including the result of improvements even in the absence of time delays. The new controls also yield a simple protocol for control handoffs of manipulation tasks between local operators and remote systems
Between The Global And The Local: A Comparison Of The British And German Clothing Industry
The clothing industry is regarded as one the most globalised industries of developed economies, yet most studies focus on the geography of production for US firms and pay scant attention to the geography of trade or to other national cases. This paper broadens the perspective to cover the whole network of German and British clothing firmsâ relationships by examining both their supply chain organisation and their market strategy, including their relations with retailers. It demonstrates the interdependencies between their strategic responses at different stages of the value chain and shows that relationships with both suppliers and customers have strongly defined the industry and firms in both countries, albeit differently. The global context of the clothing industry and the common pressures experienced by the national industries are also considered. We draw on industry statistics and on early impressions from interviews with clothing firms and retailers in both countries during 2003.clothing industry, supply chain, globalisation, United Kingdom, Germany
Generation of heterogeneous cellular structures by sonication
Many materials require functionally graded cellular microstructures whose porosity (i.e.
ratio of the void volume to the total volume of a material) is engineered to meet specific
requirements and for an optimal performance in diverse applications. Numerous
applications have demonstrated the potential of porous materials in areas ranging from
biomaterial science through to structural engineering. Polymeric foams are an example of a
cellular material whose microstructure can be considered as a blend of material and nonmaterial
zones.
While a huge variety of foams can be manufactured with homogenous porosity, for
heterogeneous foams there are no generic processes for controlling the distribution of
porosity throughout the resulting matrix. Motivated by the desire to create a flexible process
for engineering heterogeneous foams, this work has investigated how ultrasound, applied
during some of the foaming stages of a polyurethane melt, affects both the cellular structure
and distribution of the pore size.
After reviewing the literature concerning foam chemistry, ultrasound and sonochemistry,
series of experiments were performed that used an ultrasonic field created by a sonotrode
irradiating in a water bath containing a strategically placed vessel filled with foaming
reactants. Prior to this, the acoustic field in the bath had been accurately mapped so that the
acoustic pressure conditions within the foam container were known.
During the foam polymerisation reaction, the acoustic pressure in the water bath varied
causing the bubbles to pulsate in a state of âstable cavitationâ (i.e. rectified diffusion). This
pulsation of the bubbles pumped gas from the liquid to the gas phase inducing them to
increase in volume. The eventual solidification resulted in a porous material with a cellular
structure that reflected the acoustic field imposed upon it.
The experimental results revealed how the parameters of ultrasound exposure (i.e.
frequency and acoustic pressure) influenced the volume and distribution of pores within the
final polyurethane matrix: it was found that porosity varies in direct proportion to both the
acoustic pressure and the frequency of the ultrasound signal.
The effects of ultrasound on porosity demonstrated by this work offer the prospect of a
manufacturing process that can control and adjust the cellular geometry of foam and hence
ensure that the resulting characteristics of the heterogeneous material match the functional requirements.Engineering and Physical Sciences
Research Council (EPSRC)Neilson Endowment Fund, in the Department of
Mechanical Engineerin
Trading firms and the internationalization of the mould cluster of Marinha Grande
The role played by trading firms in the internationalization process of mold makers
located within the Marinha Grande cluster (Portugal) is a controversial issue. Besides finding
foreign customers some traders provide a full service to customers, from product development to
the injection and assembly of plastic parts. These traders add value to mold making and build
long-term relations with customers, contributing to clustersâ internationalization. Other traders
are accused of opportunistic behavior both as regards their relations with local producers and
relations with foreign customers, harming the clusterâs international reputation. This paper aims
to contribute to this on-going debate by presenting a study of three mold traders and the relations
they have established with foreign customers and with local mold makers
Ono: an open platform for social robotics
In recent times, the focal point of research in robotics has shifted from industrial ro- bots toward robots that interact with humans in an intuitive and safe manner. This evolution has resulted in the subfield of social robotics, which pertains to robots that function in a human environment and that can communicate with humans in an int- uitive way, e.g. with facial expressions. Social robots have the potential to impact many different aspects of our lives, but one particularly promising application is the use of robots in therapy, such as the treatment of children with autism. Unfortunately, many of the existing social robots are neither suited for practical use in therapy nor for large scale studies, mainly because they are expensive, one-of-a-kind robots that are hard to modify to suit a specific need. We created Ono, a social robotics platform, to tackle these issues. Ono is composed entirely from off-the-shelf components and cheap materials, and can be built at a local FabLab at the fraction of the cost of other robots. Ono is also entirely open source and the modular design further encourages modification and reuse of parts of the platform
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