Effect of “overlapping” voltage contacts in planar hall transducers

A mathematical model is derived to compute the output of a planar Hall tranducer (PHT) with overlapping voltage contacts at arbitrary positions and of arbitrary sizes. The model is based on the finite difference representation of the integral equation J…n ds = 0. In order to verify the model, the output of five PHTs with varying overlap sizes is measured in homogeneous and inhomogeneous fields. The computed results prove to be in good agreement with the experimental ones. The model is used to predict the effect of overlapping contacts on the output and resolution for several transducer configurations. The results are given in a number of diagrams. It is shown that a PHT with lower contacts (at the medium side) can be advantageous with respect to a biased (barber-pole) magnetoresistive (MR) head having the same size

Rethinking communication in innovation processes: creating space for change in complex systems

Abstract: In innovation studies, communication received explicit attention in the context of studies on the adoption and diffusion of innovation that dominated the field in the 1940-1970 period. Since then, our theoretical understanding of both innovation and communication has changed markedly. However, a systematic rethinking of the role of communication in innovation processes is largely lacking. This article reconceptualises the role of everyday communication and communicative intervention in innovation processes, and discusses practical implications. It is argued that we need to broaden our perspective on the types of (communicatively supported) intermediation that an innovation process includes and requires. Keywords: innovation, communication, discursive space, intermediaries, everyday tal

Language modeling and transcription of the TED corpus lectures

Transcribing lectures is a challenging task, both in acoustic and in language modeling. In this work, we present our first results on the automatic transcription of lectures from the TED corpus, recently released by ELRA and LDC. In particular, we concentrated our effort on language modeling. Baseline acoustic and language models were developed using respectively 8 hours of TED transcripts and various types of texts: conference proceedings, lecture transcripts, and conversational speech transcripts. Then, adaptation of the language model to single speakers was investigated by exploiting different kinds of information: automatic transcripts of the talk, the title of the talk, the abstract and, finally, the paper. In the last case, a 39.2% WER was achieved

Innovation brokers and their roles in value chain-network innovation: preliminary findings and a research agenda

Intervention approaches have been implemented in developing countries to enhance farmer's livelihoods through improving their linkages to markets and inclusiveness in agricultural value chains. Such interventions are aimed at facilitating the inclusion of small farmers not just in the vertical activities of the value chain (coordination of the chain) but also in the horizontal activities (cooperation in the chain). Therefore value addition is made by not just innovating products and services, but also by innovating social processes, which we define as Value Chain-Network Innovation. In Value Chain-Network Innovation, linkage formation among networks and optimisation is one of the main objectives of innovation enhancing interventions. Here some important roles for innovation brokers are envisaged as crucial to dynamise this process, connecting different actors of the innovation system, paying special attention to the weaker ones. However, little attention has been given to identify different innovation brokering roles in those approaches, and to the need that they facilitate innovation processes and open safe spaces for innovation and social learning at different organisational settings and levels, to have more effective and sustainable impacts. This paper offers some preliminary empirical evidence of the roles of innovation brokers in a developing country setting, recognising the context-sensitive nature of innovations. Two cases from work experience with intervention approaches are analysed in light of the theories of innovation brokering, presenting some empirical evidence of different types of arrangements made by innovation brokers. A third case was taken from the literature. Data from questionnaires, key informant interviews, participant observations of different types of activities and processes carried out in those approaches, SWOT analysis and project reports were used for the analysis of different types of brokering roles and to draw some lessons. One important outcome of this preliminary analysis was that Information and Communication Technologies (ICT) in integration with other media facilitate new ways of social organisation and interaction of innovation networks, which offer more possibilities for processes of innovation, aggregating value to the production and sharing of knowledge. There is already a transition of paradigm for approaching agricultural innovation to more participative and open approaches, which offers a promissory landscape for organising the value chain actors in a way that is more favourable for small farmers

Strengthening Agricultural Innovation Capacity: Are Innovation Brokers the Answer?

This paper examines the role of innovation brokers in stimulating innovation system interaction and innovation capacity building, and illustrates this by taking the case of Dutch agriculture as an example. Subsequently, it reflects upon the potential role of innovation brokers in developing countries' agriculture. It concludes that innovation brokerage roles are likely to become relevant in emerging economies and that public or donor investment in innovation brokerage may be needed to overcome inherent tensions regarding the neutrality and funding of such players in the innovation system. The Dutch experience suggests that innovation brokers need to be contextually embedded, and are unlikely to become effective through a centrally-imposed design. Hence, we conclude that stimulating their emergence requires a policy that supports institutional learning and experimentation. In the evaluation of such experiments, it is important to note that innovation brokers tend to play intangible roles that are not easily captured through conventional indicators.Agriculture, Developing Countries, The Netherlands, Innovation Broker, Neutrality, Institutional Learning, Context-Specific, Innovation Systems, Capacity Strengthening, Agricultural Extension

Beyond knowledge brokerage: an exploratory study of innovation intermediaries in an evolving smallholder agricultural system in Kenya

The recognition that innovation occurs in networks of heterogeneous actors and requires broad systemic support beyond knowledge brokering has resulted in a changing landscape of the intermediary domain in an increasingly market-driven agricultural sector in developing countries. This paper presents findings of an explorative case study that looked at 22 organisations identified as fulfilling an intermediary role in the Kenyan agricultural sector. The results show that these organisations fulfill functions that are not limited to distribution of knowledge and putting it into use. The functions also include fostering integration and interaction among the diverse actors engaged in innovation networks and working on technological, organisational and institutional innovation. Further, the study identified various organisational arrangements of innovation intermediaries with some organisations fulfilling a specialised innovation brokering role, even as other intermediaries take on brokering as a side activity, while still substantively contributing to the innovation process. Based on these findings we identify a typology of 4 innovation intermediation arrangements, including technology brokers, systemic brokers, enterprise development support and input access support. The results indicate that innovation brokering is a pervasive task in supporting innovation and will require policy support to embed it in innovation support arrangements. The paper is not normative about these arrangements

Anchorage of Innovations: Assessing Dutch efforts to use the greenhouse effect as an energy source

This case study concerns the Dutch glasshouse horticulture sector which is responsible for 10% of the country’s natural gas consumption. Various developments resulted in internal as well as external pressures to bring this down. This has led to a variety of ‘alternative energy approaches’ for the sector. The interactions between niche and regime, however, are not well understood. Building on Loeber (2003) the concept of ‘anchorage’ to analyse this interaction is used. It is concluded that the concept of anchorage provides a useful tool to study the interaction between niche and regime and the crooked pathways of ‘innovation in the making

Beyond knowledge brokerage: An exploratory study of innovation intermediaries in an evolving smallholder agricultural system in Kenya

The recognition that innovation occurs in networks of heterogeneous actors and requires broad systemic support beyond knowledge brokering has resulted in a changing landscape of the intermediary domain in an increasingly market-driven agricultural sector in developing countries. This paper presents findings of an explorative case study that looked at 22 organisations identified as fulfilling an intermediary role in the Kenyan agricultural sector. The results show that these organisations fulfill functions that are not limited to distribution of knowledge and putting it into use. The functions also include fostering integration and interaction among the diverse actors engaged in innovation networks and working on technological, organisational and institutional innovation. Further, the study identified various organisational arrangements of innovation intermediaries with some organisations fulfilling a specialised innovation brokering role, even as other intermediaries take on brokering as a side activity, while still substantively contributing to the innovation process. Based on these findings we identify a typology of 4 innovation intermediation arrangements, including technology brokers, systemic brokers, enterprise development support and input access support. The results indicate that innovation brokering is a pervasive task in supporting innovation and will require policy support to embed it in innovation support arrangements. The paper is not normative about these arrangements.Smallholder agriculture, innovation intermediaries, agriculture innovation, knowledge brokers, Kenya