| 1. |
- Bonneville, Hervé, et al.
(author)
-
EU FP7 INFSO-ICT-247223 ARTIST4G, D3.2 Advanced Relay Technical Proposals
- 2011
-
Reports (other academic/artistic)abstract
- The following document contains technical proposals for advanced relays that have been developed so far by the partners in Task 3.1 of WP3. The proposals are grouped according to the respective activity in Task 3.1 and contain a description of the innovation and all deviations from the baseline assumptions listed for state-of-the-art relay-enhanced systems in the first part of this document. For each innovation, analytical derivations and/or simulation results are provided, as well as an outlook on future work within WP3.
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| 2. |
- Abbott, Peter M., et al.
(author)
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A detailed framework of Marine Isotope Stages 4 and 5 volcanic events recorded in two Greenland ice-cores
- 2012
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In: Quaternary Science Reviews. - : Elsevier BV. - 0277-3791 .- 1873-457X. ; 36, s. 59-77
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Journal article (peer-reviewed)abstract
- Sulphate records from Greenland ice-cores indicate that Marine Isotope Stages 4 and 5 were charactensed by a higher incidence of large volcanic eruptions than other periods during the last glacial period, however, few investigations have focused on tephra deposits associated with these volcanic eruptions and the nature and origin of the events. Here we present a detailed tephrochronological framework of the products of 15 volcanic events spanning this interval: the majority of which have been preserved as cryptotephra horizons within the Greenland records. The major element compositions of individual glass shards within these horizons indicate that 13 of the eruptions originated from Iceland and 6 of these events can be correlated to the specific volcanic systems of Katla, Grimsvotn, Grimsvotn-Kverkfjoll and either Reykjanes or Veidivotn-Bardarbunga. For the remaining Icelandic horizons a source from either the rift zone or a flank zone can be suggested based on rock suite affinities. Two horizons have been correlated to a source from the Jan Mayen volcanic system which represents the first discovery of material from this system within any Greenland ice-cores. The robust geochemical characterisations, independent ages for these horizons (derived from the GICCO5 ice-core chronology) and stratigraphic positions relative to the Dansgaard-Oeschger climate events recorded in the Greenland ice-cores represent a critical framework that provides new information on the frequency and nature of volcanic events occurring in the North Atlantic region during MIS 4 and 5. This framework can now be utilised in the assessment of the differential timing and rate of response to the millennial-scale climatic events that characterised this period, through the use of the tephra horizons as time-synchronous tie-lines to other palaeoclimatic sequences.
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| 3. |
- Acosta, Stefan, et al.
(author)
-
Multicentre prospective study of fascial closure rate after open abdomen with vacuum and mesh-mediated fascial traction
- 2011
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In: British Journal of Surgery. - : Oxford University Press (OUP). - 0007-1323 .- 1365-2168. ; 98:5, s. 735-743
-
Journal article (peer-reviewed)abstract
- Background: Damage control surgery and temporary open abdomen (OA) have been adopted widely, in both trauma and non-trauma situations. Several techniques for temporary abdominal closure have been developed. The main objective of this study was to evaluate the fascial closure rate in patients after vacuum-assisted wound closure and mesh-mediated fascial traction (VAWCM) for long-term OA treatment, and to describe complications. Methods: This prospective study included all patients who received VAWCM treatment between 2006 and 2009 at four hospitals. Patients with anticipated OA treatment for fewer than 5 days and those with non-midline incisions were excluded. Results: Among 151 patients treated with an OA, 111 received VAWCM treatment. Median age was 68 years. Median OA treatment time was 14 days. Main disease aetiologies were vascular (45 patients), visceral surgical disease (57) and trauma (9). The fascial closure rate was 76.6 per cent in intention-to-treat analysis and 89 per cent in per-protocol analysis. Eight patients developed an intestinal fistula, of whom seven had intestinal ischaemia. Intestinal fistula was an independent factor associated with failure of fascial closure (odds ratio (OR) 8.55, 95 per cent confidence interval 1.47 to 49.72; P = 0.017). The in-hospital mortality rate was 29.7 per cent. Age (OR 1.21, 1.02 to 1.43; P = 0.027) and failure of fascial closure (OR 44.50, 1.13 to 1748.52; P = 0.043) were independently associated with in-hospital mortality. Conclusion: The VAWCM method provided a high fascial closure rate after long-term treatment of OA. Technique-related complications were few. No patient was left with a large planned ventral hernia.
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| 4. |
- Adolfson, Malin, et al.
(author)
-
Monetary policy trade-offs in an estimated open-economy DSGE model
- 2014
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In: Journal of Economic Dynamics and Control. - : Elsevier BV. - 0165-1889 .- 1879-1743. ; 42, s. 33-49
-
Journal article (peer-reviewed)abstract
- This paper studies the trade-offs between stabilizing CPI inflation and alternative measures of the output gap in Ramses, the Riksbank's estimated dynamic stochastic general equilibrium (DSGE) model of a small open economy. Our main finding is that the trade-off between stabilizing CPI inflation and the output gap strongly depends on which concept of potential output in the output gap between output and potential output is used in the loss function. If potential output is defined as a smooth trend this trade-off is much more pronounced compared to the case when potential output is defined as the output level that would prevail if prices and wages were flexible.
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| 5. |
- Adolfson, Malin, et al.
(author)
-
Optimal Money Policy in an Operational Medium-Sized DSGE Model
- 2011
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In: Journal of Money, Credit and Banking. - : Wiley. - 0022-2879 .- 1538-4616. ; 43, s. 1287-1331
-
Journal article (peer-reviewed)abstract
- We show how to construct optimal policy projections in Ramses, the Riksbank's open-economy medium-sized dynamic stochastic general equilibrium model for forecasting and policy analysis. Bayesian estimation of the parameters of the model indicates that they are relatively invariant to alternative policy assumptions and supports our view that the model parameters may be regarded as unaffected by the monetary policy specification. We discuss how monetary policy, and in particular the choice of output gap measure, affects the transmission of shocks. Finally, we use the model to assess the recent Great Recession in the world economy and how its impact on the economic development in Sweden depends on the conduct of monetary policy. This provides an illustration on how Rames incoporates large international spillover effects.
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| 6. |
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| 7. |
- Alerstam, Erik, et al.
(author)
-
Single-fiber diffuse optical time-of-flight spectroscopy
- 2012
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In: Optics Letters. - 0146-9592. ; 37:14, s. 2877-2879
-
Journal article (peer-reviewed)abstract
- We demonstrate interstitial diffuse optical time-of-fight spectroscopy based on a single fiber for both light delivery and detection. Detector saturation due to the massive short-time reflection is avoided by ultrafast gating of a single photon avalanche diode. We show that the effects of scattering and absorption are separable and that absorption can be assessed independently of scattering. Measurements on calibrated liquid phantoms and subsequent Monte Carlo-based evaluation illustrate that absorption coefficients can be accurately assessed over a wide range of medically relevant optical properties. Our findings pave the way to simplified and less invasive interstitial in vivo spectroscopy. (C) 2012 Optical Society of America
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| 8. |
- Andersson, Maria, et al.
(author)
-
Chronic widespread pain in patients with rheumatoid arthritis and the relation between pain and disease activity measures over the first 5 years
- 2013
-
In: Journal of Rheumatology. - Toronto, ON : Journal of Rheumatology Publishing. - 0315-162X .- 1499-2752. ; 40:12, s. 1977-1985
-
Journal article (peer-reviewed)abstract
- OBJECTIVE: To study the prevalence of chronic widespread pain (ChWP), chronic regional pain (ChRP), and fibromyalgia in patients with early rheumatoid arthritis (RA) followed for 5 years after inclusion, and to study the effect of pain on measures of disease activity and function.METHODS: A questionnaire was sent to 1910 patients participating in the Better Anti-Rheumatic Pharmacotherapy study. The responders (73%) were divided into 3 groups according to the reported pain duration and distribution - patients having no chronic pain (NChP), ChWP, and ChRP. Outcome measures were the 28-joint Disease Activity Score (DAS28), the Health Assessment Questionnaire (HAQ), and C-reactive protein (CRP).RESULTS: Thirty-four percent of respondents reported ChWP, 46% ChRP, and 20% NChP. Patients reporting ChWP were more often women and had more pain and tender joints at inclusion. From 6 months to 5 years of followup, mean DAS28, visual analog scale (VAS) pain, VAS global health, and HAQ were significantly higher in the ChWP group than in the other groups. However, all groups showed a similar pattern in swollen joint count, erythrocyte sedimentation rate (ESR), and CRP. From 12 months the ChWP group was treated with prednisolone to a greater extent than the ChRP group, and it had a rate of treatment with disease-modifying antirheumatic drugs similar to that of the ChRP group.CONCLUSION: ChWP is a common feature in RA, more associated with high values for variables related to pain such as the DAS28 and HAQ than to indicators of ongoing inflammation such as swollen joint count, ESR, and CRP. Patients with ChWP should be identified so that adequate treatment also of the noninflammatory pain may be instituted.
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| 9. |
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| 10. |
- Andersson, Stefan, et al.
(author)
-
Repositories Recreated : The Finch report versus DiVA in Sweden
- 2013
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In: Information Services and Use. - 0167-5265 .- 1875-8789. ; 33:2, s. 183-189
-
Journal article (peer-reviewed)abstract
- Recently the technological and organizational infrastructures of institutional repositories have been questioned. For example the British so-called Finch report from last summer argued that further development, as well as higher standards of accessibility of repositories, are needed in order to make them better integrated and interoperable to ultimately bring greater use by both authors and readers. Not only the technical frameworks and presumably low usage levels are criticized but also the lack of “clear policies on such matters as the content they will accept, the uses to which it may be put, and the role that they will play in preservation”. The report concludes that: “In practice patterns of deposit are patchy”.As in the UK, today, all universities and university colleges in Sweden, except a couple of very small and specialized ones, do have an institutional repository. A majority (around 80%) are working together on a co-operative basis within the DiVA Publishing System with the Electronic Publishing Centre at Uppsala University Library acting as the technical and organizational hub. Because the system is jointly funded, and the members contribute according to their size, it has been possible even for smaller institutions with limited resources to run a repository with exactly the same functionalities as the biggest universities.In this article we want to demonstrate the ever-increasing importance of institutional repositories in Sweden. Starting more than a decade ago the DiVA Consortium has, for some time, been addressing the problems now raised by the Finch report in a number of areas.
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| 11. |
- Andersson, Stefan, et al.
(author)
-
Repositories Recreated : Working Towards Improved Interoperability and Integration by a Co-operative Approach in Sweden
- 2013
-
Conference paper (peer-reviewed)abstract
- Recently the technological and organizational infrastructures of institutional repositories have been questioned. For example the British so-called Finch report from last summer argued that further development, as well as higher standards of accessibility of repositories, are needed in order to make them better integrated and interoperable to ultimately bring greater use by both authors and readers. Not only the technical frameworks and presumably low usage levels are criticized but also the lack of “clear policies on such matters as the content they will accept, the uses to which it may be put, and the role that they will play in preservation”. The report concludes that: “In practice patterns of deposit are patchy”.As in the UK, today, all universities and university colleges in Sweden, except a couple of very small and specialized ones, do have an institutional repository. A majority (around 80%) are working together on a co-operative basis within the DiVA Publishing System with the Electronic Publishing Centre at Uppsala University Library acting as the technical and organizational hub. Because the system is jointly funded, and the members contribute according to their size, it has been possible even for smaller institutions with limited resources to run a repository with exactly the same functionalities as the biggest universities.In this presentation we want to demonstrate the ever-increasing importance of institutional repositories in Sweden. Starting more than a decade ago the DiVA Consortium has, for some time, been addressing the problems now raised by the Finch report in a number of areas.
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| 12. |
- Axelsson, Robert, et al.
(author)
-
Evaluation of Multi-level Social Learning for Sustainable Landscapes : Perspective of a Development Initiative in Bergslagen, Sweden
- 2013
-
In: Ambio. - : Springer Netherlands. - 0044-7447 .- 1654-7209. ; 42:2, s. 241-253
-
Journal article (peer-reviewed)abstract
- To implement policies about sustainable landscapes and rural development necessitates social learning about states and trends of sustainability indicators, norms that define sustainability, and adaptive multi-level governance. We evaluate the extent to which social learning at multiple governance levels for sustainable landscapes occur in 18 local development initiatives in the network of Sustainable Bergslagen in Sweden. We mapped activities over time, and interviewed key actors in the network about social learning. While activities resulted in exchange of experiences and some local solutions, a major challenge was to secure systematic social learning and make new knowledge explicit at multiple levels. None of the development initiatives used a systematic approach to secure social learning, and sustainability assessments were not made systematically. We discuss how social learning can be improved, and how a learning network of development initiatives could be realized.
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| 13. |
- Aydin, Osman, et al.
(author)
-
EU FP7 INFSO-ICT-317669 METIS, D 4.1 Summary on preliminary trade-off investigations and first set of potential network-level solutions
- 2013
-
Reports (other academic/artistic)abstract
- METIS WP4 covers research activities in network-level aspects of the advancement of wireless network technologies towards the year 2020 and beyond. The aim is to develop novel network-level technology concepts to address the challenges foreseen in future scenarios with regard to interference, traffic and mobility management issues. Moreover, another task of this work package is to propose functional enablers which can support the above potential solutions.This document provides* a report of the ongoing progress in WP4 regarding the research topics agreed upon in IR 4.1,* a high level description of the proposed concepts and approaches adopted by different partners.More specifically, the document describes, first set of potential network-level solutions and presents some first research results in order to position them with regards to the state of the art approaches. It also gives an overview of research activities to be considered later in WP4.
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| 14. |
- Bergman, Anders, et al.
(author)
-
Enabling DC-Side Metering in HVDC Stations
- 2014
-
In: IEEE Transactions on Power Delivery. - : Institute of Electrical and Electronics Engineers (IEEE). - 0885-8977 .- 1937-4208. ; 29:1, s. 370-377
-
Journal article (peer-reviewed)abstract
- HVDC power transmission is now being considered not only for point-to-point interties, but also as true grids where several operators may tie into the grid, each having its own economic sphere. In this new situation, it is important that transmitted energy be distinguished from losses incurred in the converter stations, to enable a fair distribution of costs for grid operation. To this end, a metrology infrastructure is needed where high-current and high-voltage transducers must be possible to calibrate traceably, and where dc electricity meters can be calibrated and approved. A research project is currently working with these questions in a concerted European research effort, funded by the European Commission. The present publication highlights important aspects of this work.
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| 15. |
- Bexell, Daniel, et al.
(author)
-
Rat Multipotent Mesenchymal Stromal Cells Lack Long-Distance Tropism to 3 Different Rat Glioma Models
- 2012
-
In: Neurosurgery. - 0148-396X. ; 70:3, s. 731-739
-
Journal article (peer-reviewed)abstract
- BACKGROUND: Viral gene therapy of malignant brain tumors has been restricted by the limited vector distribution within the tumors. Multipotent mesenchymal stromal cells (MSCs) and other precursor cells have shown tropism for gliomas, and these cells are currently being explored as potential vehicles for gene delivery in glioma gene therapy. OBJECTIVE: To investigate MSC migration in detail after intratumoral and extratumoral implantation through syngeneic and orthotopic glioma models. METHODS: Adult rat bone marrow-derived MSCs were transduced to express enhanced green fluorescent protein and implanted either directly into or at a distance from rat gliomas. RESULTS: We found no evidence of long-distance MSC migration through the intact striatum toward syngeneic D74(RG2), N32, and N29 gliomas in the ipsilateral hemisphere or across the corpus callosum to gliomas located in the contralateral hemisphere. After intratumoral injection, MSCs migrated extensively, specifically within N32 gliomas. The MSCs did not proliferate within tumors, suggesting a low risk of malignant transformation of in vivo grafted cell vectors. Using a model for surgical glioma resection, we found that intratumorally grafted MSCs migrate efficiently within glioma remnants after partial surgical resection. CONCLUSION: The findings point to limitations for the use of MSCs as vectors in glioma gene therapy, although intratumoral MSC implantation provides a dense and tumor-specific vector distribution.
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| 16. |
- Biendicho, Jordi Jacas, et al.
(author)
-
New in-situ neutron diffraction cell for electrode materials
- 2014
-
In: Journal of Power Sources. - : Elsevier BV. - 0378-7753 .- 1873-2755. ; 248, s. 900-904
-
Journal article (peer-reviewed)abstract
- A novel neutron diffraction cell has been constructed to allow in-situ studies of the structural changes in materials of relevance to battery applications during charge/discharge cycling. The new design is based on the coin cell geometry, but has larger dimensions compared to typical commercial batteries in order to maximize the amount of electrode material and thus, collect diffraction data of good statistical quality within the shortest possible time. An important aspect of the design is its modular nature, allowing flexibility in both the materials studied and the battery configuration. This paper reports electrochemical tests using a Nickel-metal-hydride battery (Ni-MH), which show that the cell is able to deliver 90% of its theoretical capacity when using deuterated components. Neutron diffraction studies performed on the Polaris diffractometer using nickel metal and a hydrogen-absorbing alloy (MH) clearly show observable changes in the neutron diffraction patterns as a function of the discharge state. Due to the high quality of the diffraction patterns collected in-situ (i.e. good peak-to-background ratio), phase analysis and peak indexing can be performed successfully using data collected in around 30 min. In addition to this, structural parameters for the beta-phase (charged) MH electrode obtained by Rietveld refinement are presented. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
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| 17. |
- Bjarnason, Thordur, et al.
(author)
-
One-Year Follow-up After Open Abdomen Therapy With Vacuum-Assisted Wound Closure and Mesh-Mediated Fascial Traction
- 2013
-
In: World Journal of Surgery. - : Springer Science and Business Media LLC. - 0364-2313 .- 1432-2323. ; 37:9, s. 2031-2038
-
Journal article (peer-reviewed)abstract
- Open abdomen (OA) therapy frequently results in a giant planned ventral hernia. Vacuum-assisted wound closure and mesh-mediated fascial traction (VAWCM) enables delayed primary fascial closure in most patients, even after prolonged OA treatment. Our aim was to study the incidence of hernia and abdominal wall discomfort 1 year after abdominal closure. A prospective multicenter cohort study of 111 patients undergoing OA/VAWCM was performed during 2006-2009. Surviving patients underwent clinical examination, computed tomography (CT), and chart review at 1 year. Incisional and parastomal hernias and abdominal wall symptoms were noted. The median age for the 70 surviving patients was 68 years, 77 % of whom were male. Indications for OA were visceral pathology (n = 40), vascular pathology (n = 22), or trauma (n = 8). Median length of OA therapy was 14 days. Among 64 survivors who had delayed primary fascial closure, 23 (36 %) had a clinically detectable hernia and another 19 (30 %) had hernias that were detected on CT (n = 18) or at laparotomy (n = 1). Symptomatic hernias were found in 14 (22 %), 7 of them underwent repair. The median hernia widths in symptomatic and asymptomatic patients were 7.3 and 4.8 cm, respectively (p = 0.031) with median areas of 81.0 and 42.9 cm(2), respectively (p = 0.025). Of 31 patients with a stoma, 18 (58 %) had a parastomal hernia. Parastomal hernia (odds ratio 8.9; 95 % confidence interval 1.2-68.8) was the only independent factor associated with an incisional hernia. Incisional hernia incidence 1 year after OA therapy with VAWCM was high. Most hernias were small and asymptomatic, unlike the giant planned ventral hernias of the past.
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| 18. |
- Byttner, Stefan, et al.
(author)
-
Consensus self-organized models for fault detection (COSMO)
- 2011
-
In: Engineering applications of artificial intelligence. - Oxford : Pergamon Press. - 0952-1976 .- 1873-6769. ; 24:5, s. 833-839
-
Journal article (peer-reviewed)abstract
- Methods for equipment monitoring are traditionally constructed from specific sensors and/or knowledge collected prior to implementation on the equipment. A different approach is presented here that builds up knowledge over time by exploratory search among the signals available on the internal field-bus system and comparing the observed signal relationships among a group of equipment that perform similar tasks. The approach is developed for the purpose of increasing vehicle uptime, and is therefore demonstrated in the case of a city bus and a heavy duty truck. However, it also works fine for smaller mechatronic systems like computer hard-drives. The approach builds on an onboard self-organized search for models that capture relations among signal values on the vehicles’ data buses, combined with a limited bandwidth telematics gateway and an off-line server application where the parameters of the self-organized models are compared. The presented approach represents a new look at error detection in commercial mechatronic systems, where the normal behavior of a system is actually found under real operating conditions, rather than the behavior observed in a number of laboratory tests or test-drives prior to production of the system. The approach has potential to be the basis for a self-discovering system for general purpose fault detection and diagnostics.
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| 19. |
- Byttner, Stefan, 1975-, et al.
(author)
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Finding the odd-one-out in fleets of mechatronic systems using embedded intelligent agents
- 2010
-
In: Embedded reasoning. - Menlo Park, California : AAAI Press. - 9781577354581 ; , s. 17-19
-
Conference paper (peer-reviewed)abstract
- With the introduction of low-cost wireless communication many new applications have been made possible; applications where systems can collaboratively learn and get wiser without human supervision. One potential application is automated monitoring for fault isolation in mobile mechatronic systems such as commercial vehicles. The paper proposes an agent design that is based on uploading software agents to a fleet of mechatronic systems. Each agent searches for interesting state representations of a system and reports them to a central server application. The states from the fleet of systems can then be used to form a consensus from which it can be possible to detect deviations and even locating a fault.
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| 20. |
- Byttner, Stefan, et al.
(author)
-
Incremental classification of process data for anomaly detection based on similarity analysis
- 2011
-
In: EAIS 2011. - Piscataway, N.J. : IEEE Press. - 9781424499793 ; , s. 108-115
-
Conference paper (peer-reviewed)abstract
- Performance evaluation and anomaly detection in complex systems are time consuming tasks based on analyzing, similarity analysis and classification of many different data sets from real operations. This paper presents an original computational technology for unsupervised incremental classification of large data sets by using a specially introduced similarity analysis method. First of all the so called compressed data models are obtained from the original large data sets by a newly proposed sequential clustering algorithm. Then the datasets are compared by pairs not directly, but by using their respective compressed data models. The evaluation of the pairs is done by a special similarity analysis method that uses the so called Intelligent Sensors (Agents) and data potentials. Finally a classification decision is generated by using a predefined threshold of similarity. The applicability of the proposed computational scheme for anomaly detection, based on many available large data sets is demonstrated on an example of 18 synthetic data sets. Suggestions for further improvements of the whole computation technology and a better applicability are also discussed in the paper.
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| 21. |
- Casanovas, Inés
(author)
-
Online Education in Universities : Moving from Individual Adoption to Institutionalisation of an Information Technology Innovation
- 2013
-
Doctoral thesis (other academic/artistic)abstract
- This thesis describes and analyses the move from individual adoption to institutionalisation of an information technology innovation: online education in universities. The study focuses on the processes that took place within two universities, one in Sweden and the other in Argentina, regarding online education adoption and the organisational changes developed.The aim is to contribute to the understanding of individual and organisational strategies for the institutionalisation of the innovation. To achieve this aim, three research questions were posed. The first focused on the way in which teachers influence the adoption processes. The next addressed the changes and interactions at the individual and institutional levels resulting from these processes. The third question deepened into the methodological practices that can harmonise stakeholders‟ objectives and the conflicting interests regarding online education initiatives. Innovation theory, complemented with organisational theories provided the foundation for the description and analysis of the information technology innovation and the adoption processes.The results of analysing and interpreting the collected data from the two universities in two different countries (Sweden and Argentina) showed that the adoption processes appeared to be evolutionary rather than revolutionary. The iterative nature of the appropriation and the constant “newness” of the information technology innovation may be plausible explanations for the phenomenon. Though the change has not yet become an integral part of the formal core of the institutions, it has been a great achievement considering the universities‟ structure, culture and resources.The contributions provide complementary and pluralistic insights into the research field of Information Systems, for both theory and practice, as well as into higher education managers‟ decision-making. Furthermore, the knowledge contribution of the thesis could be applied to implementation of information technology innovations in other organisations with similar characteristics as the studied higher education institutions. Such characteristics are, for example, to be complex and knowledge intensive.Interactions at macro and micro organisational levels could be modelled as the cyclic linkage between sensemaking outcomes and institutionalized structures. A higher level of theorization resulted in a meta-theory model to describe and explain the linkage itself within the perspective of adaptive structuration theory.Regarding practice, scholar-engaged research allowed conflicting interests to be reconciled by changing the existing practices through sensemaking and negotiation among stakeholders in an ongoing implementation. As an overall conclusion, online education is still far from being fully institutionalised. After four years of technological and contextual changes during the research development, a positive shift can be seen in teachers‟ attitude towards online education. They show more confidence in working with constantly improved virtual environments. Nevertheless, there are still key factors that need to be faced regarding online education adoption and institutionalisation. These factors are of a strategic nature and the way to handle them seems to be more political than technological or pedagogical.
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| 22. |
- D’Amico, Valeria, et al.
(author)
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EU FP7 INFSO-ICT-247223 ARTIST4G, D1.2 Innovative advanced signal processing algorithms for interference avoidance
- 2010
-
Reports (other academic/artistic)abstract
- This document provides an overview of the proposed innovations and activities in Task 1.1 of Work Package 1 (WP1) of the ARTIST4G project, related to interference avoidance. Focus is on the technical approaches applicable at the physical layer, which are grouped into four different classes of innovations related to single-cell multi-user MIMO schemes, multi-cell multi-user MIMOschemes, advanced 3D beamforming and enabling functionalities. Descriptions of the proposed innovations are given including basic ideas, potential of performance, simulation results, realization options and possible implementation restrictions.
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| 23. |
- Davidsson, Karin, et al.
(author)
-
Safe Efficient Vehicle Solutions -On Driving Forces for Future Road Transportations
- 2011
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In: EEVC Brussels, Belgium, October 26-28, 2011.
-
Conference paper (other academic/artistic)abstract
- The primary objective of this paper is to present the most relevant factors and driving forces that influence future sustainable road transportations and exemplify how they may influence the development. The research methodology used is explorative scenarios where data collected from workshops, expert panels and surveys lay the foundations for the explanatory models [1]. Several driving forces are identified. However, two of them are found to be more important for the study as they have a strong influence on the development of the road transport system; yet it is uncertain how these driving forces will develop. The first of these driving forces is the ability of the authorities to take an active role when developing a sustainable transport system and the second how actively people will demand and support changes in the vehicles and the transport system. Four different future road transportation scenarios have been created to explore how changes in these two driving forces will influence the development of vehicles and road transport system; these scenarios are explained together with characteristics of future road transportation solutions. It is concluded that plans for technology development need to consider the uncertainties of these driving forces in order to enable creation of robust development roadmaps.
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| 24. |
- Davies, Siwan M., et al.
(author)
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Tracing volcanic events in the NGRIP ice-core and synchronising North Atlantic marine records during the last glacial period
- 2010
-
In: Earth and Planetary Science Letters. - : Elsevier BV. - 0012-821X .- 1385-013X. ; 294, s. 69-79
-
Journal article (peer-reviewed)abstract
- Abstract Five basaltic tephra horizons have been identified in the NGRIP ice-core during the last glacial period. Geochemical analyses indicate that these tephras are of Icelandic origin with one horizon identified as the Faroe Marine Ash Zone III (FMAZ III) — an important marker horizon in several marine records within the Faroe Islands margin. The FMAZ III is a few millimetres thick and is constrained to 38,122 ± 723 yr b2k (before year AD 2000) according to the Greenland Ice Core Chronology (GICC05). This event falls directly at the thermal peak of Greenland Interstadial 8 (GI-8) and a marine-ice correlation, based on the position of this tephra, suggests a close coupling of the marine and atmospheric systems at this time. The remaining tephras originate from the Eastern Volcanic Zone with the Katla volcanic system pinpointed as the dominant source. These are thought to represent previously unknown volcanic events which add considerably to our knowledge of Icelandic volcanism during this period. Independent ages are assigned to these events and together with major element characterisation, form the backbone of the tephrochronology framework presented here. Despite the identification of these tephras, this study also demonstrates that the sulphate record may not always act as a suitable proxy for the identification of tephra horizons in ice-core records.
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| 25. |
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