Wave power—Sustainable energy or environmentally costly? A review with special emphasis on linear wave energy converters

Generating electricity from waves is predicted to be a new source of renewable energy conversion expanding significantly, with a global potential in the range of wind and hydropower. Several wave power techniques are on the merge of commercialisation, and thus evoke questions of environmental concern. Conservation matters are to some extent valid independent of technique but we mainly focus on point absorbing linear generators. By giving examples from the Lysekil project, run by Uppsala University and situated on the Swedish west coast, we demonstrate ongoing and future environmental studies to be performed along with technical research and development. We describe general environmental aspects generated by wave power projects; issues also likely to appear in Environmental Impact Assessment studies. Colonisation patterns and biofouling are discussed with particular reference to changes of the seabed and alterations due to new substrates. A purposeful artificial reef design to specially cater for economically important or threatened species is also discussed. Questions related to fish, fishery and marine mammals are other examples of topics where, e.g. no-take zones, marine bioacoustics and electromagnetic fields are important areas. In this review we point out areas in which studies likely will be needed, as ventures out in the oceans also will give ample opportunities for marine environmental research in general and in areas not previously studied. Marine environmental and ecological aspects appear to be unavoidable for application processes and in post-deployment studies concerning renewable energy extraction. Still, all large-scale renewable energy conversion will cause some impact mainly by being area demanding. An early incorporation of multidisciplinary and high quality research might be a key for new ocean-based techniques.     

Evaluation of the benefits of vehicle safety technology: The MUNDS study

Real-world retrospective evaluation of the safety benefits of new integrated safety technologies is hampered by the lack of sufficient data to assess early reliable benefits. This MUNDS study set out to examine if a “prospective” case-control meta-analysis had the potential to provide more rapid and rigorous analyses of vehicle and infrastructure safety improvements. To examine the validity of the approach, an analysis of the effectiveness of ESC using a consistent analytic strategy across 6 European and Australasian databases was undertaken. It was hypothesised that the approach would be valid if the results of the MUNDS analysis were consistent with those published earlier (this would confirm the suitability of the MUNDS approach). The findings confirm the hypothesis and also found stronger and more robust findings across the range of crash-types, road conditions, vehicle sizes and speed zones than previous. The study recommends that while a number of limitations were identified with the findings that need be addressed in future research, the MUNDS approach nevertheless should be adopted widely for the benefit of all vehicle occupants.     

Information system development agility as organizational learning

Information System Development (ISD) agility is concerned with why and how ISD organizations sense and respond swiftly as they develop and maintain Information System applications. We outline a theory of ISD agility that draws upon a model of IT innovation and organizational learning. The theory adopts March's concepts of exploration and exploitation to investigate agility in the context of ISD organizations. Depending on their learning focus, ISD organizations make choices as to what sensing and responding swiftly means. This is reflected in how they value speed in relation to other ISD process goals, including quality, cost, risk and innovative content. The paper examines two specific Research Propositions: (1) ISD organizations locate themselves into different innovation regimes with respect to their need for exploration and exploitation, and (2) their perceptions of agility differ in those regimes as reflected in their process goal priorities. We validate these propositions through an empirical investigation of changes in ISD organizations' process goals and innovation practices over a period of over 4 years (1999–2003), during which time they shied away from exploration to exploitation while innovating with Internet computing. These ISD organizations viewed agility differently during the studied time periods as reflected in how they traded innovative content or speed vis-à-vis the other process goals of cost, risk, and product quality. In conclusion, this paper discusses implications for future research on agility in ISD organizations.     

Transposition invariant words

We define an operation called transposition on words of fixed length. This operation arises naturally when the letters of a word are considered as entries of a matrix. Words that are invariant with respect to transposition are of special interest. It turns out that transposition invariant words have a simple interpretation by means of elementary group theory. This leads us to investigate some properties of the ring of integers modulo n$n$ and primitive roots. In particular, we show that there are infinitely many prime numbers p$p$ with a primitive root dividing p+1$p+1$ and infinitely many prime numbers p$p$ without a primitive root dividing p+1$p+1$. We also consider the orbit of a word under transposition.     

Personalisierte Medizin und Informed Consent: Klinische und ethische Erwägungen im Rahmen der Entwicklung einer Best Practice Leitlinie für die biobankbasierte Ganzgenomforschung in der Onkologie

Definition of the problem Breakthrough discoveries in genomics allow the sequencing of the human genome within a couple of days at a reasonable price. In cancer research, whole genome sequencing helps to identify the molecular lesions that drive tumour growth and thereby provide the basis for the development of targeted therapies. However, genomic research also raises new ethical questions. The interdisciplinary EURAT project in Heidelberg (Germany) addresses these normative questions. It aims at developing an ethically and legally informed practice for biobank-based genomic research in Heidelberg. Arguments This paper gives an overview of the relevant ethical and clinical questions of biobank-based genomic sequencing with regard to the informed consent process. It also presents a code of conduct as an institutional ethics response to the following question: how research institutions can foster the responsible handling of genetic information in biobank-based research throughout the institution. Conclusion A thorough informed consent process and the code of conduct are elements of a best-practice guideline and should be a guide for responsible conduct of all employees who handle sensitive genetic data.     

Why organizations adopt information system process innovations: a longitudinal study using Diffusion of Innovation theory

Abstract.  This paper identifies factors that affected over 200 information system (IS) process innovation adoption decisions in three organizational environments over a period that spanned four decades. The analysis is based on Rogers's (1995) theory of Diffusion of Innovations (DOI). The results show that several DOI factors strongly affect IS process innovation adoption. These include user need recognition, availability of technological infrastructure, past experience, own trials, autonomous work, ease of use, learning by doing and standards. Yet, a large number of IS process innovation adoptions followed no discernible pattern.     

Disruptive information system innovation: the case of internet computing

Abstract. Information system (IS) innovation can be defined as a novel organizational application of digital computer and information communication technologies (ICT). This paper discusses how modalities of applying ICT technologies in their form and scope exhibit radical breaks, which are introduced herein as ‘disruptive IS innovations’. This notion of disruptive IS innovation is developed by drawing upon and extending Swanson's (1994) theory of IS innovation as well as the concept of radical innovation. Disruptive innovations strongly influence the future trajectory of the adoption and use of ICT in organizational contexts and make the trajectory deviate from its expected course. In doing so, these disruptive innovations distinctly define what an IS is and how it is deployed in order to address current and future organizational and managerial prerogatives. Such changes are triggered breakthroughs in the capability of ICT that lead to the revision and expansion of associated cognitive models (frames) of computing. Disruptive IS innovations are those that lead to changes in the application of ICT that are both pervasive and radical. The pervasive nature implies that innovative activity spans all innovation subsets of the quad‐core model of IS innovation introduced herein. Innovation types include: IS use and development processes; application architecture and capability; and base technologies. Radical in nature, disruptive is innovations depart in significant ways from existing alternatives and lead to deviation from expected use and diffusion trajectory. This paper demonstrates the importance of a concept of disruptive IS innovation by investigating how changes triggered by internet computing (Lyytinen et al., 1998) meet the conditions of a disruptive IS innovation defined herein. The analysis also affirms both the pervasive and radical nature of internet computing and explains how internet computing has fundamentally transformed the application portfolio, development practices and IS services over time. The analysis demonstrates that, with the concept of disruptive IS innovation, we can fruitfully analyse ‘long’ waves of ICT evolution – an issue that has largely been overlooked in the IS community. On a theoretical plane, the paper advocates the view that we need to look beyond linear, unidirectional, and atomistic concepts of the diffusion of IS innovations where innovative activity takes places in a linear fashion by oscillating between small technological innovations and small organizational innovations. In contrast, IS innovation can exhibit fundamental discontinuity; we need to theoretically grasp such disruptive moments. The recent influx of innovation, spurred by internet‐based technology, offers one such moment.     

Undoped polyaniline–surfactant complex for corrosion prevention

Due to the strict regulations on the usage of heavy metals as the additives in the coating industries, the search for effective organic corrosion inhibitors in replacement of metal additives has become essential. Electrically conducting polymers have been shown to be effective for corrosion prevention, but the poor solubility of these intractable polymers has been a problem. We have explored a polyaniline–4-dodecylphenol complex (PANi–DDPh) to improve the dissolution, and it has been shown to be an effective organic corrosion inhibitor. With the surfactant, DDPh, PANi could be diluted into the coatings, and the properties of the coatings were affected. An emeraldine base (EB) form of PANi was also found to be oxidized by the hardener. The oxidized form of polyaniline provides improved corrosion protection of metals than that of emeraldine base since the value of the standard electrode potential for the oxidized form of PANi is higher than that of EB. Additionally, the surfactant improves the wet adhesion property between the coating and the metal surface. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2849–2856, 1999     

Multi-character model of the construction project definition process

In spite of its widely agreed significance, the construction project definition process is still a relatively new research topic. In VTT Building Technology a 2-year study of the project definition process was carried out. The study, which is called Preplanner, was a joint effort involving research institute and five companies representing owners of heavy industry. This paper presents the findings of sub-project of Preplanner study. The sub-project focused on the modelling of the project definition process. A multi-character model of the project definition process was obtained as the main result. The model provides a balanced representation of various characteristics of the project definition process. The feedback obtained from company personnel suggests that, compared with the other identified models, this model provides improved capabilities to explain the nature of the project definition process.