| 1. |
- Abolins, M., et al.
(författare)
-
The ATLAS Data Acquisition and High Level Trigger system
- 2016
-
Ingår i: Journal of Instrumentation. - 1748-0221 .- 1748-0221. ; 11
-
Tidskriftsartikel (refereegranskat)abstract
- This paper describes the data acquisition and high level trigger system of the ATLAS experiment at the Large Hadron Collider at CERN, as deployed during Run 1. Data flow as well as control, configuration and monitoring aspects are addressed. An overview of the functionality of the system and of its performance is presented and design choices are discussed.
|
|
| 2. |
- Echeverri, Per, 1958-, et al.
(författare)
-
Consumers’ Experience Rooms : Environmental Design Factors in Shopping Processes
- 2009
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Shopping has become one of our most common leisure pursuits. Consumers move freely between stores and their different environments, often in a random manner. The question is how much randomness there actually is regarding how these environments make the customers feel and move. We have chosen to observe consumers in order to see how the environment affects their perceptions. The practical aim of this study is to deepen our understanding of how consumers are affected by the service environment of a shopping centre and based on that identify improvements as regards to design. The theoretical aim is to identify what environmental dimensions appear to be important in a real-time purchase situation. This includes a validation of some theories of service environment dimensions and design attributes. The methodological aim is to further elaborate on video-supported field observation. Empirical material is gathered at a shopping centre in Karlstad, Sweden, called Mitt i City. Video and audio recordings together with personal interviews in situ are used in documenting consumption processes, patterns of movements and perceptions. We observed and interviewed our informants before, during, and after their visits to the shopping centre. These aims lead to a clarification as regards to how the service environment creates an experience, meaning and function for the consumers by means of the concept of the shopping centre. The study shows that design factors (such as layout, spatial form, colour combinations, choices of material and character), together with atmospherics (sound, light, temperature) and furnishing, are important parameters for consumers in their sensemaking of a shopping concept and the functionality of the shopping procedure per se. Contact information For further information on authors and details of the study, please contact Per Echeverri at Service Research Center – CTF, Faculty of Economy, Communication and IT, Karlstad University. E-mail: per.echeverri@kau.se
|
|
| 3. |
- Fahnestock, Jesse, 1974-, et al.
(författare)
-
RISEnergy: Roadmaps for energy innovation in Sweden through 2030
- 2016
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- RISE Research Institutes of Sweden is a group of research and technology organisations. RISE is a leading innovation partner working global cooperation with academia, enterprise and society to create value, growth and competitiveness through research excellence and innovation.In the area of Energy, RISE has developed innovation Roadmaps covering:Energy Efficient TransportElectric Power SystemEnergy Efficient and Smart BuildingsSustainable Thermal ProcessesEfficient Energy Use in IndustryDecarbonisation of Basic IndustriesThese Roadmaps describe development pathways for technologies, non-technical elements (market design, user behaviours, policies, etc.) and key actors that deliver on a plausible, desirable vision for each respective innovation area in 2030. These Roadmaps are intended to support RISE’s strategic planning and development, but should be relevant reading for anyone interested in energy innovation in Sweden.
|
|
| 4. |
- Jalkanen, Pinja, et al.
(författare)
-
A Combination of N and S Antigens With IgA and IgG Measurement Strengthens the Accuracy of SARS-CoV-2 Serodiagnostics
- 2021
-
Ingår i: Journal of Infectious Diseases. - : Oxford University Press. - 0022-1899 .- 1537-6613. ; 224:2, s. 218-228
-
Tidskriftsartikel (refereegranskat)abstract
- Background. Primary diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is based on detection of virus RNA in nasopharyngeal swab samples. In addition, analysis of humoral immunity against SARS-CoV-2 has an important role in viral diagnostics and seroprevalence estimates. Methods. We developed and optimized an enzyme immunoassays (EIA) using SARS-CoV-2 nucleoprotein (N), Si and receptor binding domain (RBD) of the viral spike protein, and N proteins from SARS, Middle East respiratory syndrome (MERS), and 4 low-pathogenic human CoVs. Neutralizing antibody activity was compared with SARS-CoV-2 IgG, IgA, and IgM EIA results. Results. The sensitivity of EIA for detecting immune response in COVID-19 patients (n = 101) was 77% in the acute phase and 100% in the convalescent phase of SARS-CoV-2 infection when N and RBD were used as antigens in IgG and IgA specific EIAs. SARS-CoV-2 infection significantly increased humoral immune responses against the 229E and NL63 N proteins. Si and RBD-based EIA results had a strong correlation with microneutralization test results. Conclusions. The data indicate a combination of SARS-CoV-2 Si or RBD and N proteins and analysis of IgG and IgA immunoglobulin classes in sera provide an excellent basis for specific and sensitive serological diagnostics of COVID-19.
|
|
| 5. |
- TURUNEN, TUOMAS, et al.
(författare)
-
Open-water computations of a marine propeller using openfoam
- 2014
-
Ingår i: ECFD VI - 6th European Congress on Computational Fluid Dynamics, Barcelona, Spain, 20-25 July 2014. - 9788494284472 ; , s. 1123-1134
-
Konferensbidrag (refereegranskat)abstract
- The flow around a marine propeller is studied by means of a RANS-type finite-volume (FV) method. A performance curve in open-water conditions is reproduced computationally and compared to data measured in a cavitation tunnel at Rolls-Royce in Kristinehamn, Sweden. In the computations, both periodic grids with a single propeller blade and grids featuring a full propeller with five blades are used. Two types of full propeller grids are applied. The first one consists of tetrahedral control volumes with prismatic layers near the propeller surface. The second grid type is a hybrid mesh that is a combination of separately meshed hexahedral and tetrahedral grids with an Arbitrary Mesh Interface (AMI) between the two parts. Turbulence is modelled by the two-equation SST k-! model as implemented in OpenFOAM .In steady-state computations, the Moving Reference Frame (MRF) approach is applied to account for the e↵ects due to rotation. In case of transient simulations, moving meshes with the sliding plane approach are utilized and the e↵ect of both numerical and iterative errors due to temporal discretization are studied.This study provides a solid basis for more complicated simulations by providing an understanding of errors caused by grid interfaces and the choice of spatial and temporal discretizations of the governing equations. In particular, the experiences with the AMI methodology will allow the analysis of contra-rotating propellers (CRP) with OpenFOAM. In addition, the robustness of the numerical method is considered in order to be able to produce a usable tool for industrial use.
|
|
| 6. |
- Xia, Liming, et al.
(författare)
-
Performance Prediction of a Nozzle Propeller
- 2012
-
Ingår i: 29th Symposium on Naval Hydrodynamics, Gothenburg, Sweden, Aug. 2012.
-
Konferensbidrag (refereegranskat)abstract
- Nozzle, or ducted, propellers are most commonly used when high efficiency is required at low speed of the vessel. However, normally with a nozzle fitted that accelerates propeller inflow, its blades take a larger risk of cavitation. This paper examines the performance of a nozzle propeller configuration in terms of open water and thrust breakdown characteristics by both experimental and conventional RANS CFD methods. Combining the merits of EFD and CFD, the results reveal some promising features as well as challenges in performance predictions of nozzle propellers.
|
|
| 7. |
- Zhang, Baili, et al.
(författare)
-
CFD modeling of propeller tip vortex over large distances
- 2013
-
Ingår i: Proceedings of the International Offshore and Polar Engineering Conference. - 1098-6189 .- 1555-1792. - 9781880653999 ; , s. 947-952
-
Konferensbidrag (refereegranskat)abstract
- In this paper, a numerical study has been conducted to investigate the evolution of a ship propeller tip vortex over large distance using Reynolds-averaged Navier Stokes (RANS) CFD method. In order to reduce numerical dissipation in tracking the tip vortex, a unique hybrid mesh structure was designed and a vorticity confinement method is also introduced to further enhance the high resolution of the tip vortex.
|
|
| 8. |
- Zhang, B. L., et al.
(författare)
-
CFD Modeling of Propeller Tip Vortex over Large Distances
- 2014
-
Ingår i: International Journal of Offshore and Polar Engineering. - 1053-5381. ; 24:3, s. 181-183
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, a numerical study has been conducted to investigate the evolution of a ship propeller tip vortex over a large distance by using Reynolds-averaged Navier-Stokes (RANS) CFD method. In order to reduce numerical dissipation in tracking the tip vortex, a unique hybrid mesh structure was designed, and a vorticity confinement method was also introduced to further enhance the high resolution of the tip vortex.
|
|
| 9. |
- Zhang, Baili, et al.
(författare)
-
Numerical Capture of Wing-tip Vortex Using Vorticity Confinement
- 2012
-
Ingår i: 65th Annual Meeting of the APS Division of Fluid Dynamics, November 18–20, 2012, San Diego, California; http://meetings.aps.org/link/BAPS.2012.DFD.A1.6.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Tracking vortices accurately over large distances is very important in many areas of engineering, for instance flow over rotating helicopter blades, ship propeller blades and aircraft wings. However, due to the inherent numerical dissipation in the advection step of flow simulation, current Euler and RANS field solvers tend to damp these vortices too fast. One possible solution to reduce the unphysical decay of these vortices is the application of vorticity confinement methods. In this study, a vorticity confinement term is added to the momentum conservation equations which is a function of the local element size, the vorticity and the gradient of the absolute value of vorticity. The approach has been evaluated by a systematic numerical study on the tip vortex trailing from a rectangular NACA0012 half-wing. The simulated structure and development of the wing-tip vortex agree well with experiments both qualitatively and quantitatively without any adverse effects on the global flow field. It is shown that vorticity confinement can negate the effect of numerical dissipation, leading to a more or less constant vortex strength. This is an approximate method in that genuine viscous diffusion of the vortex is not modeled, but it can be appropriate for vortex dominant flows over short to medium length scales where viscous diffusion can be neglected.
|
|
