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Search Results: 1 - 10 of 31152 matches for " Thomas Magnusson "
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Corporate Social Responsibility and Knowledge Management Implications in Sustainable Vehicle Innovation and Development
Hamid Jafari Khaledabadi,Thomas Magnusson
Communications of the IBIMA , 2008,
Abstract: Recently, due to the ever-increasing concern regarding the environment, the automotive industry has experienced a significant technological competition in the power-train. Focusing on how Corporate Social Responsibility issues can affect product innovation in a mature industry, this paper studies different technology strategies in sustainable vehicle development. In this regard, after a comprehensive literature review, by carrying out a patent analysis in Europe, the study exemplifies how typical technological knowledge could be managed to enhance innovation strategies. The study reveals that hybrid and fuel-cell technologies have gained prominent attention in the past two decades and seem to be the least risky approaches of alternative technology vehicles in the foreseeable future. Also, the study shows that the Japanese carmakers, who have had a clear commitment to sustainable management, have been the pioneers in this field. Moreover, the paper has some strategic science-to-market transfer implications as well which could serve as the cornerstones of sustainable competitive advantage.
On-Demand WebRTC Tunneling in Restricted Networks
Thomas Sandholm,Boris Magnusson,Bjorn A. Johnsson
Computer Science , 2013,
Abstract: In this paper we present the implementation of a WebRTC gateway service that can forward ad-hoc RTP data plane traffic from a browser on one local network to a browser on another local network. The advantage compared to the existing IETF STUN (RFC 5389), TURN (RFC 5766) and ICE (RFC 5245) protocols is that it does not require a public host and port mapping for each participating local host, and it works with more restrictive firewall policies. WebRTC implements ICE which combines STUN and TURN probes to automatically find the best connection between two peers who want to communicate. In corporate networks, simple hole punching and NAT traversal techniques typically do not work, e.g. because of symmetric NATs. Dynamic allocation of ports on an external 3rd party relay service is also typically blocked on restricted hosts. In our use case, doctors at hospitals can only access port 80 through the hospital firewall on external machines, and they need to communicate with patients who are typically behind a NAT in a local WiFi network. VPN solutions only work for staff but not between patients and staff. Our solution solves this problem by redirecting all WebRTC traffic through a gateway service on the local network that has a secure tunnel established with a public gateway. The public gateway redirects traffic from multiple concurrent streams securely between local gateway services that connect to it. The local gateways also communicate with browsers on their local network to mimic a direct browser-to-browser connection without having to change the browser runtime. We have demonstrated that this technique works well within the hospital network and arbitrary patient networks, without the need for any individual host configuration. In our evaluation we show that the latency overhead is 18-20 ms for each concurrent stream added to the same gateway service.
Limits of multipole pluricomplex Green functions
Jon I. Magnusson,Alexander Rashkovskii,Ragnar Sigurdsson,Pascal J. Thomas
Mathematics , 2011, DOI: 10.1142/S0129167X12500656
Abstract: Let $S_\epsilon$ be a set of $N$ points in a bounded hyperconvex domain in $C^n$, all tending to 0 as$\epsilon$ tends to 0. To each set $S_\epsilon$ we associate its vanishing ideal $I_\epsilon$ and the pluricomplex Green function $G_\epsilon$ with poles on the set. Suppose that, as $\epsilon$ tends to 0, the vanishing ideals converge to $I$ (local uniform convergence, or equivalently convergence in the Douady space), and that $G_\epsilon$ converges to $G$, locally uniformly away from the origin; then the length (i.e. codimension) of $I$ is equal to $N$ and $G \ge G_I$. If the Hilbert-Samuel multiplicity of $I$ is strictly larger than $N$, then $G_\epsilon$ cannot converge to $G_I$. Conversely, if the Hilbert-Samuel multiplicity of $I$ is equal to $N$, (we say that $I$ is a complete intersection ideal), then $G_\epsilon$ does converge to $G_I$. We work out the case of three poles; when the directions defined by any two of the three points converge to limits which don't all coincide, there is convergence, but $G > G_I$.
From Theory to Practice—When and How to Implement Service Value Agreement  [PDF]
Merat Ziyarazavi, Christer Magnusson
Journal of Service Science and Management (JSSM) , 2013, DOI: 10.4236/jssm.2013.61013
Abstract:

Traditionally, a Service Level Agreement (SLA) is used as an appendix in IT Service Management agreements to set expectations and delineate the service delivery description as well as the terms and conditions of delivery. However, SLAs are unable to imply and guarantee the added values expected by the customer. Service Value Agreement (SVA) is a newly developed framework that identifies the deliverable added values along with metrics to measure the quality and quantity of achievements in terms of business added values. The objective of this study is to expand the concept of SVA for Application Management (AM) services and suggest guidelines for its implementation in real business cases. This goal is fulfilled through the case study approach and outsourcing industry contributions. Authors suggest discussing the concept of SVA from early stages of the sales lifecycle and implementing it gradually during the steady state phase. Combination of Service Value Mapping approach and Piloting method is suggested for SVA proposition as an option with successful practical history.

Spontaneous breathing with airway pressure release ventilation favors ventilation in dependent lung regions and counters cyclic alveolar collapse in oleic-acid-induced lung injury: a randomized controlled computed tomography trial
Hermann Wrigge, J?rg Zinserling, Peter Neumann, Thomas Muders, Anders Magnusson, Christian Putensen, G?ran Hedenstierna
Critical Care , 2005, DOI: 10.1186/cc3908
Abstract: In this randomized controlled experimental trial, 22 pigs with oleic-acid-induced lung injury were randomly assigned to receive APRV with or without spontaneous breathing at comparable airway pressures. Four hours after randomization, dynamic computed tomography scans of the lung were obtained in an apical slice and in a juxtadiaphragmatic transverse slice. Analyses of regional attenuation were performed separately in nondependent and dependent halves of the lungs on end-expiratory scans and end-inspiratory scans. Tidal changes were assessed as differences between inspiration and expiration of the mechanical breaths.Whereas no differences were observed in the apical slices, spontaneous breathing resulted in improved tidal ventilation of dependent lung regions (P < 0.05) and less cyclic collapse (P < 0.05) in the juxtadiaphragmatic slices. In addition, with spontaneous breathing, the end-expiratory aeration increased and nonaerated tissue decreased in dependent lung regions close to the diaphragm (P < 0.05 for the interaction ventilator mode and lung region).Spontaneous breathing during APRV redistributes ventilation and aeration to dependent, usually well-perfused, lung regions close to the diaphragm, and may thereby contribute to improved arterial oxygenation. Spontaneous breathing also counters cyclic collapse, which is a risk factor for ventilation-associated lung injury.Spontaneous breathing in any phase of the mechanical ventilator cycle is possible during airway pressure release ventilation (APRV), a technique that provides ventilatory support by time-cycled switching between two continuous positive airway pressure levels [1-3]. Studies in patients with acute lung injury (ALI) suggest that spontaneous breathing with APRV not only reduces the need for sedation to adapt the patient to the ventilator [4], but also improves both systemic blood flow and arterial blood oxygenation when compared with controlled mechanical ventilation [4-6]. Mechanisms for improved ox
Breeding for Improved Disease Resistance in Organic Farming – Possibilities and Constraints
Magnusson Ulf
Acta Veterinaria Scandinavica , 2002, DOI: 10.1186/1751-0147-43-s1-s59
Abstract: Lowered incidences of disease may be reached in several ways: management and rearing measures, vaccination programmes and preventive medications as well as breeding for improved disease resistance. Here the focus is on breeding for improved resistance to infectious diseases. In comparison to conventional farming, one has to acknowledge that the spectrum of diseases in animals reared under organic conditions is different and that the proportion of the breeding stock of animals in organic farming is considerably smaller. There are at least four different approaches that may be used in breeding towards resistance to infectious diseases. The most obvious is to record disease incidence in the progeny and select those parents that produce the progeny with the lowest incidences of disease. Another approach is to use breeders possessing certain major histo-compatibility complex antigens suggested being associated with resistance to certain infections. A third approach is to analyse the heritability of a set of immune functions or related traits crucial for resistance to infections and then use the traits with high heritability in breeding programmes. Finally, one may genetically select animals for high immune response using an index that combines estimated breeding values for several immunological traits. Examples of these various approaches are given and the feasibility for using these in organic farming are discussed.
Application of a Detailed Emission Model for Heavy Duty Diesel Engine Simulations Application d'un modèle détaillé d'émissions pour la simulation de gros moteurs diesel
Magnusson I.
Oil & Gas Science and Technology , 2006, DOI: 10.2516/ogst:1999028
Abstract: A detailed chemical model describing the formation of soot and NO is applied to simulate emission formation in a heavy duty diesel engine. Cylinder flow and spray development is simulated using an engine CFD code - Speedstar. Combustion is described using a simple eddy break-up model. Modeling of the emission-chemistry/turbulent-flow interaction is based on a flamelet approach. Contrary to a typical flamelet concept, transport equations are solved for mass fractions of soot and NO. The reason being that these major emission constituencies are assumed to change slowly in comparison to typical time scales for chemical processes or transport processes important for combustion. Chemical reactions leading to production and destruction of soot and NO are, however, assumed to be fast. Soot and NO source terms are therefore evaluated from a flamelet library using a presumed probability density function and integrating over mixture fraction space. Results from simulations are compared to engine measurements inform of exhaust emission data and cylinder pressure. Un modèle avec chimie détaillée décrivant la formation des suies et du NO est appliqué à la simulation de la formation des polluants dans un gros moteur Diesel. L'écoulement et le spray sont modélisés avec le code de calcul Speedstar. La combustion est représentée par le modèle eddy break-up . La modélisation de l'interaction entre l'écoulement turbulent et la chimie des polluants est basée sur une approche de type flamelet . Cependant, à la différence d'autres travaux, des équations de transport pour les fractions massiques de suies et de NO sont résolues. Cela est justifié par la supposition que les temps caractéristiques de formation de ces composés sont longs comparés à ceux associés aux phénomènes de transport et aux réactions chimiques associées à la combustion. Cependant, les vitesses de réaction se rapportant aux suies et au NO sont supposées rapides. Cela permet d'évaluer les termes sources des suies et du NO à partir d'une bibliothèque de flamelets en utilisant une approche de type densité de probabilité présumée et en intégrant dans l'espace des fractions de mélange. Les résultats de simulations sont comparés à des mesures à l'échappement d'un moteur ainsi qu'aux évolutions de la pression dans le cylindre.
Qualifying and Quantifying IT Services Added Values in Outsourcing Assignments—Service Value Agreement  [PDF]
Merat Ziyarazavi, Christer Magnusson, Torbjorn Tergesten
Journal of Service Science and Management (JSSM) , 2012, DOI: 10.4236/jssm.2012.54038
Abstract: Traditionally, a Service Level Agreement (SLA) including service level metrics is used as an appendix in IT Service Management agreements to define the terms and conditions of delivery and set expectations. However, SLA neither implies nor guarantees the added values that are expected by the customer. Besides, due to the nature of IT services, there always exists uncertainty about the agreed services due to which the perceived risk for both customer and provider is high. Moreover, the quality and quantity of delivered values are mostly hidden by hazy marketing slogans. In order to guarantee the values of an offered service, the deliverable added values should be characterized properly, quantified by means of measurable metrics, and agreed upon between the two parties. Such comprehensive material, including the deliverable added values along with their measurable metrics, is called Service Value Agreement (SVA). This research proposes a platform for IT service offerings based on added values by identifying, as well as quantifying, an organization’s objectives in purchasing Application Management (AM) services from a provider firm.
Cardiorespiratory effects of spontaneous breathing in two different models of experimental lung injury: a randomized controlled trial
Dirk Varelmann, Thomas Muders, J?rg Zinserling, Ulf Guenther, Anders Magnusson, G?ran Hedenstierna, Christian Putensen, Hermann Wrigge
Critical Care , 2008, DOI: 10.1186/cc7108
Abstract: Forty-four pigs were randomly assigned to ALI resulting either from hydrochloric acid aspiration (HCl-ALI) or from increased intra-abdominal pressure plus intravenous oleic acid injections (OA-ALI) and were ventilated in PCV mode either with SB (PCV + SB) or without SB (PCV – SB). Cardiorespiratory variables were measured at baseline after induction of ALI and after 4 hours of treatment (PCV + SB or PCV – SB). Finally, density distributions and end-expiratory lung volume (EELV) were assessed by thoracic spiral computed tomography.PCV + SB improved arterial partial pressure of oxygen/inspiratory fraction of oxygen (PaO2/FiO2) by a reduction in intrapulmonary shunt fraction in HCl-ALI from 27% ± 6% to 23% ± 13% and in OA-ALI from 33% ± 19% to 26% ± 18%, whereas during PCV – SB PaO2/FiO2 deteriorated and shunt fraction increased in the HCl group from 28% ± 8% to 37% ± 17% and in the OA group from 32% ± 12% to 47% ± 17% (P < 0.05 for interaction time and treatment, but not ALI type). PCV + SB also resulted in higher EELV (HCl-ALI: 606 ± 171 mL, OA-ALI: 439 ± 90 mL) as compared with PCV – SB (HCl-ALI: 372 ± 130 mL, OA-ALI: 192 ± 51 mL, with P < 0.05 for interaction of time, treatment, and ALI type).SB improves oxygenation, reduces shunt fraction, and increases EELV in both models of ALI.Alveolar recruitment in response to therapeutic interventions such as mechanical ventilation with positive end-expiratory pressure (PEEP) has been suggested to differ between direct (pulmonary) or indirect (extrapulmonary) acute lung injury (ALI) or the acute respiratory distress syndrome (ARDS) [1-3]. In direct ALI/ARDS, the injury originates from the alveolar epithelium and is characterized by alveolar collapse, fibrinous exudates, and alveolar wall edema [4], which might result in an increased lung elastance while chest wall elastance is often normal Computed tomography (CT) scans show equal amounts of consolidation and ground-glass opacities, with consolidated areas favoring the verte
Non-communicable diseases and global health governance: enhancing global processes to improve health development
Roger S Magnusson
Globalization and Health , 2007, DOI: 10.1186/1744-8603-3-2
Abstract: The paper assesses the merits of the Millennium Development Goals (MDGs) and the FCTC as distinct global processes for advancing health development, before considering what lessons might be learned for enhancing the implementation of the Global Strategy on Diet. While global partnerships, economic incentives, and international legal instruments could each contribute to a more effective global response to chronic diseases, the paper makes a special case for the development of international legal standards in select areas of diet and nutrition, as a strategy for ensuring that the health of future generations does not become dependent on corporate charity and voluntary commitments. A broader frame of reference for lifestyle-related chronic diseases is needed: one that draws together WHO's work in tobacco, nutrition and physical activity, and that envisages selective use of international legal obligations, non-binding recommendations, advocacy and policy advice as tools of choice for promoting different elements of the strategy.Since 1970, life expectancy at birth has improved steadily, rising 7, 8 and 9 years, respectively, within high, middle and low income countries to reach 79, 70 and 58 years, as measured from data for the period 2000–2005 [1]. While the underlying causes of these gains continue to be debated [2], longer life expectancy has resulted in the global predominance of non-communicable diseases as both the leading cause of death, and of disease burden. According to World Health Organisation (WHO) estimates, non-communicable diseases accounted for nearly 59% of the 57 million people who died in 2002 [3]. In the same year, non-communicable diseases also outstripped both communicable diseases, and injuries, as the leading cause of chronic illness worldwide, accounting for nearly 47% of the 1.49 billion years of healthy life "lost" to illness, as measured in DALYs [3].Within developing countries, this "epidemiological transition" reflects the higher proportio
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