An Exploratory Study of Forces and Frictions affecting Large-Scale Model-Driven Development

In this paper, we investigate model-driven engineering, reporting on an exploratory case-study conducted at a large automotive company. The study consisted of interviews with 20 engineers and managers working in different roles. We found that, in the context of a large organization, contextual forces dominate the cognitive issues of using model-driven technology. The four forces we identified that are likely independent of the particular abstractions chosen as the basis of software development are the need for diffing in software product lines, the needs for problem-specific languages and types, the need for live modeling in exploratory activities, and the need for point-to-point traceability between artifacts. We also identified triggers of accidental complexity, which we refer to as points of friction introduced by languages and tools. Examples of the friction points identified are insufficient support for model diffing, point-to-point traceability, and model changes at runtime.Comment: To appear in proceedings of MODELS 2012, LNCS Springe

Re-Inventing Public Education:The New Role of Knowledge in Education Policy-Making

This article focuses on the changing role of knowledge in education policy making within the knowledge society. Through an examination of key policy texts, the Scottish case of Integrated Children Services provision is used to exemplify this new trend. We discuss the ways in which knowledge is being used in order to re-configure education as part of a range of public services designed to meet individuals' needs. This, we argue, has led to a 'scientization' of education governance where it is only knowledge, closely intertwined with action (expressed as 'measures') that can reveal problems and shape solutions. The article concludes by highlighting the key role of knowledge policy and governance in orienting education policy making through a re-invention of the public role of education

Wireless Play and Unexpected Innovation

Part of the Volume on Digital Young, Innovation, and the Unexpected. This chapter considers play as leading to unexpected innovation in advanced wireless technologies. It concludes that much of the potential for new media to enhance innovation actually echoes much older patterns, as evidenced by comparisons to wireless history. These are patterns of privilege, particularly class and gender privilege, reinforced by strict intellectual property protections. Detailed case studies are presented of the "wardrivers," young male computer enthusiasts who helped map wi-fi signals over the past decade, and of earlier analog wireless enthusiasts. The chapter offers a solid critique of many present-day celebrations of technology-driven innovation and of the rhetoric of participatory culture

Attributing scientific and technical progress: the case of holography

Holography, the three-dimensional imaging technology, was portrayed widely as a paradigm of progress during its decade of explosive expansion 1964–73, and during its subsequent consolidation for commercial and artistic uses up to the mid 1980s. An unusually seductive and prolific subject, holography successively spawned scientific insights, putative applications and new constituencies of practitioners and consumers. Waves of forecasts, associated with different sponsors and user communities, cast holography as a field on the verge of success—but with the dimensions of success repeatedly refashioned. This retargeting of the subject represented a degree of cynical marketeering, but was underpinned by implicit confidence in philosophical positivism and faith in technological progressivism. Each of its communities defined success in terms of expansion, and anticipated continual progressive increase. This paper discusses the contrasting definitions of progress in holography, and how they were fashioned in changing contexts. Focusing equally on reputed ‘failures’ of some aspects of the subject, it explores the varied attributes by which success and failure were linked with progress by different technical communities. This important case illuminates the peculiar post-World War II environment that melded the military, commercial and popular engagement with scientific and technological subjects, and the competing criteria by which they assessed the products of science

Negative Feedback, Amplifiers, Governors, and More

The invention of the negative feedback amplifier by Harold S. Black (1898\u20131983) in 1928 is considered one of the great achievements in electronics and in fact it stands among the IEEE milestone, being credited to the Bell Labs. Black had been hired by Western Electric in 1921 and assigned to work on the Type C system, a newly introduced three-channel telephone network, whose push-pull vacuum-tube repeater amplifiers tended to produce a too large harmonic distortion when connected in tandem [1]. At that time, telephone network where in a great spread and the Bell Labs arose quickly as the major research company of the sector. The extension of lines over long distances required counteracting signal attenuation, which occurred, though at a reduced level, also in lines provided with Pupin\u2019s loading coils to match the Heaviside condition for distortion-free transmission

Jim Crace: inventor of worlds

Jim Crace is a novelist who makes no religious claims. He is a maker of worlds that have dark resonances, caught between time and eternity, that have their roots in forms of textuality and language that begin in the Hebrew Bible and may be traced in Christianity through the texts of the desert fathers to the writings of T. E. Lawrence and Gertrude Bell. He is a deceiver whose deceptions reveal truths that are familiar yet strange and mysterious

Explaining the First Industrial Revolution: Two Views

This review essay looks at the recent books on the British Industrial Revolution by Robert Allen and Joel Mokyr. Both writers seek to explain Britain’s primacy. This paper offers a critical but sympathetic account of the main arguments of the two authors considering both the economic logic and the empirical validity of their rival claims. In each case, the ideas are promising but the evidence base seems in need of further support. It may be that eventually these explanations for British economic leadership at the turn of the nineteenth century are recognized as complementary rather than competing.

Should Social Amplification of Risk Be Counteracted?

The importance of the conceptual statement, by Roger Kasperson et al., on social amplification of risk lies, firstly, in the identification of a phenome-non as one worth studying, instead of being irritated and frustrated ibout it and concerned only to get it out of the way. Accusations of “public hysteria ” and “ irresponsible media ” are commonplace, without any real attempt at understanding causes and mecha-nisms, let alone a closer look at the normative qualifications of “ hysteria ” and “irre~ponsibility”.~ Kasperson et al. provide a forceful summing up of the limitations of traditional, technical risk analysis, and propose to overcome the limitations by adding the phenomenon of public reactions to risk and further repercussions (“secondary impacts”). One may wonder whether this is sufficient; but it clearly is necessary. Secondly, the attempt at systematic description usefully articulates a number of dimensions and aspects of the problem. The added benefit is that, in doing so, some of the ambiguities become apparent-of the proposed analysis, but also of the way we tend to treat the phenomena of social amplification of risk. For example, although the phenomenon is defined in a neutral way, in the introduction and later when communications theory is invoked (“amplification denotes the process of intensifying or attenuating signals during the transmission of infor

On Low Complexity Detection for QAM Isomorphic Constellations

Despite of the known gap from the Shannon's capacity, several standards are still employing QAM or star shape constellations, mainly due to the existing low complexity detectors. In this paper, we investigate the low complexity detection for a family of QAM isomorphic constellations. These constellations are known to perform very close to the peak-power limited capacity, outperforming the DVB-S2X standard constellations. The proposed strategy is to first remap the received signals to the QAM constellation using the existing isomorphism and then break the log likelihood ratio computations to two one dimensional PAM constellations. Gains larger than 0.6 dB with respect to QAM can be obtained over the peak power limited channels without any increase in detection complexity. Our scheme also provides a systematic way to design constellations with low complexity one dimensional detectors. Several open problems are discussed at the end of the paper.Comment: Submitted to IEEE GLOBECOM 201

Herd Behaviour as an Incentive Scheme

This paper presents a model of technology invention in an emerging market. Managers wait and adopt the standard technology in the hope to free-ride on the effort level of another manager who may invent a superior technology. The more managers who adopt the standard technology, the more their successors believe that probably the superior technology doesn't exist. As this hampers the successors' incentives to innovate, herding in my model reduces the scope of strategic waiting.