| 2921. |
- Metri, Prashant G, 1987-
(författare)
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Mathematical Analysis of Forced Convective Flow Due to Stretching Sheet and Instabilities of Natural Convective Flow
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The investigations presented in the thesis are theoretical studies of magnetohydrodynamic flows, heat and mass transfer in Newtonian/non-Newtonian cooling liquids, due to horizontal/vertical stretching sheet. The theoretical studies include the effect of magnetic field, uniform and non-uniform heat source/sink (flow and temperature dependent heat source/sink) effects. The considered problems include flow of viscous fluids in the presence of applied magnetic field and electric field with first order chemical reactions. The viscous incompressible Newtonian fluid flow in porous medium with Darcy-Forchheimmer model, electrically conducting fluid and nanofluid is studied. We introduce innovative techniques for finding solutions of highly nonlinear coupled boundary value problems such as Runge-Kutta method, Perturbation method and Differential Transform Method (DTM). Chapter 1-2 gives a brief introduction. Chapter 3 focuses on Lie group analysis of MHD flow and heat transfer over a stretching sheet. The effects of viscous dissipation, uniform heat source/sink and MHD on heat transfer are addressed. In Chapter 4-6 we examined the laminar flow, thermocapillary flow of a nanoliquid thin film over an unsteady stretching sheet in presence of MHD and thermal Radiation in different situations. An effective medium theory (EMT) based model is used for the thermal conductivity of the nanoliquid. Metal and metal oxide nanoparticles are considered in carboxymethyl cellulose (CMC) - water base liquid. In Chapter 7-9 we analyzed, heat and mass transfer in MHD, mixed convection, viscoelastic fluid flow, non-Darcian flow due to stretching sheet in presence of viscous dissipation, non-uniform heat source/sink and porous media have been investigated in different situations. MHD and viscous dissipation have a significant influence on controlling of the dynamics. In Chapter 10 the linear stability of Maxwell fluid-nanofluid flow in a saturated porous layer is examined theoretically when the walls of the porous layers are subjected to time-periodic temperature modulations. A modified Darcy-Maxwell model is used to describe the fluid motion, and the nanofluid model used includes the effects of the Brownian motion. The thermal conductivity and viscosity are considered to be dependent on the nanoparticle volume fraction.In Chapter 11 we studied MHD flow in a vertical double passage channel taking into account the presence of the first order chemical reactions. The governing equations are solved by using a regular perturbation technique valid for small values of the Brinkman number and a DTM valid for all values of the Brinkman number.
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| 2922. |
- Meyer, Gero, et al.
(författare)
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Fire and explosions in underground structures : A literature review of performed tests and an introduction to common modelling in finite element codes
- 2011
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report is a literature review which summarizes performed fire and explosion tests in tunnels and underground enclosures. Relevant pictures and graphs have been inserted from the papers reviewed, to illustrate the test settings and the results.The report also gives a brief introduction to the subject itself. Questions that stillneed to be answered are identified and discussed. Furthermore it includes useful tablesto compare the most common computer modelling and finite element codes AUTODYN, EUROPLEXUS and LS-DYNA used for calculation of blast load and construction response.
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| 2923. |
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| 2924. |
- Meyer, Gero, 1978-, et al.
(författare)
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Hazard of broken commuter train windows due to explosion
- 2013
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report compiles the results of window explosion tests carried out as part of the METRO project by the Swedish Defence Research Agency (FOI) and Mälardalens Högskola (MDH) in Shock Tube IV in Märsta, Sweden. 15 shots were made with varying distances between window and charge and varyingcharge weights.The report describes the components and assembly of the tests and the results are presented in detail. It further questions the previous method of definingdanger zones, suggesting a new approach and gives ideas to improve further similar tests.
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| 2925. |
- Michell, Stephen, et al.
(författare)
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Extendable Dispatchable Task Communication Mechanisms
- 1999
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Ingår i: IRTAW '99 Proceedings of the ninth international workshop on Real-time AdaPages 54-59. - : Association for Computing Machinery (ACM). - 1581131771 ; , s. 54-59
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The addition of object-oriented features to Ada has left a disconnection between the object-oriented paradigm and the intertask communication and synchronisation paradigms. The lack of extensibility of tasks and protected types as well as the task synchronisation inheritance anomaly has made design of systems that use them with object oriented features more difficult. This paper proposes Ada language changes that would make protected types and tasks partners in object oriented programming and would cure the inheritance anomaly.
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| 2926. |
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| 2927. |
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| 2928. |
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| 2929. |
- Midgley, Gerald, et al.
(författare)
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Towards a new framework for evaluating systemic problem structuring methods
- 2013
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Ingår i: European Journal of Operational Research. - : Elsevier BV. - 0377-2217 .- 1872-6860. ; 229:1, s. 143-154
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Operational researchers and social scientists often make significant claims for the value of systemic problem structuring and other participative methods. However, when they present evidence to support these claims, it is usually based on single case studies of intervention. There have been very few attempts at evaluating across methods and across interventions undertaken by different people. This is because, in any local intervention, contextual factors, the skills of the researcher and the purposes being pursued by stakeholders affect the perceived success or failure of a method. The use of standard criteria for comparing methods is therefore made problematic by the need to consider what is unique in each intervention. So, is it possible to develop a single evaluation approach that can support both locally meaningful evaluations and longer-term comparisons between methods? This paper outlines a methodological framework for the evaluation of systemic problem structuring methods that seeks to do just this.
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| 2930. |
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Migration och etnicitet : Perspektiv på ett mångkulturellt Sverige
- 2015. - 2
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Denna bok, som här ges ut i en omarbetad upplaga, ger en introduktion till den sociologiska forskningen om etnicitet och migration i Sverige. Med utgångspunkt i teorier om makt söker vi beskriva och analysera hur etnicitet som kategori skapas och upprätthålls och hur detta strukturerar samhället.Debatten om migrations- och integrationspolitik, om social exkludering och utanförskap, om strukturell diskriminering och postkolonialism, om banal nationalism och identiteter, om ”vi och dom”, har fått stor aktualitet inte minst till följd av Sverigedemokraternas uppsving efter valet 2014 samt utvecklingen efter terrordåden 7 januari 2015 i Paris. Inför denna upplaga har några nya kapitel som tar upp frågor av stor aktualitet tillkommit.Migration och etnicitet behandlar teorier om etniska relationer och identiteter i förhållande till social stratifiering, mångkulturalism och exkluderingsmekanismer. Den tar upp invandrings- och flyktingpolitik, situationen för samer och romer, samt ett antal sakområden som bl.a. gäller representation, diskriminering och segregering, men också stereotyper, generationskonflikter och åldrande.Boken riktar sig till studenter och forskare inom sociologi, socialt arbete och IMER, men den lämpar sig också för andra samhällsveten- skapliga utbildningar som behandlar etnicitet och migrationsfrågor.
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