Institution
Swedish Defence Research Agency
Government•Stockholm, Sweden•
About: Swedish Defence Research Agency is a government organization based out in Stockholm, Sweden. It is known for research contribution in the topics: Radar & Synthetic aperture radar. The organization has 1413 authors who have published 2731 publications receiving 56083 citations. The organization is also known as: Totalförsvarets forskningsinstitut.
Papers published on a yearly basis
Papers
More filters
••
05 Apr 2003TL;DR: Two techniques are proposed: Cross-Keys that uses discrete taps on virtual keys integrated with a crosshair cursor, and an analog Precision-Handle that uses a leverage (gain) effect to amplify movement precision from the user's finger tip to the end cursor.
Abstract: Bare hand pointing on touch screens both benefits and suffers from the nature of direct input. This work explores techniques to overcome its limitations. Our goal is to design interaction tools allowing pixel level pointing in a fast and efficient manner. Based on several cycles of iterative design and testing, we propose two techniques: Cross-Keys that uses discrete taps on virtual keys integrated with a crosshair cursor, and an analog Precision-Handle that uses a leverage (gain) effect to amplify movement precision from the user's finger tip to the end cursor. We conducted a formal experiment with these two techniques, in addition to the previously known Zoom-Pointing and Take-Off as baseline anchors. Both subjective and performance measurements indicate that Precision-Handle and Cross-Keys complement existing techniques for touch screen interaction.
336 citations
••
Institut de radioprotection et de sûreté nucléaire1, Polish Academy of Sciences2, Babeș-Bolyai University3, Deutscher Wetterdienst4, Swedish Defence Research Agency5, University of Milan6, IRSA7, Vienna University of Technology8, Radiological Protection Institute of Ireland9, Comenius University in Bratislava10, Aristotle University of Thessaloniki11, Radiation and Nuclear Safety Authority12, University College Dublin13, Norwegian Radiation Protection Authority14, Technical University of Denmark15, Bulgarian Academy of Sciences16, International Atomic Energy Agency17, United States Environmental Protection Agency18, University of Bologna19, Polytechnic University of Catalonia20, German National Metrology Institute21
TL;DR: The measurements made across Europe following the releases from the Fukushima NPP reactors have provided a significant amount of new data on the ratio of the gaseous ( 131)I fraction to total (131)I, both on a spatial scale and its temporal variation.
Abstract: Radioactive emissions into the atmosphere from the damaged reactors of the Fukushima Dai-ichi nuclear power plant (NPP) started on March 12th, 2011. Among the various radionuclides released, iodine-131 ((131)I) and cesium isotopes ((137)Cs and (134)Cs) were transported across the Pacific toward the North American continent and reached Europe despite dispersion and washout along the route of the contaminated air masses. In Europe, the first signs of the releases were detected 7 days later while the first peak of activity level was observed between March 28th and March 30th. Time variations over a 20-day period and spatial variations across more than 150 sampling locations in Europe made it possible to characterize the contaminated air masses. After the Chernobyl accident, only a few measurements of the gaseous (131)I fraction were conducted compared to the number of measurements for the particulate fraction. Several studies had already pointed out the importance of the gaseous (131)I and the large underestimation of the total (131)I airborne activity level, and subsequent calculations of inhalation dose, if neglected. The measurements made across Europe following the releases from the Fukushima NPP reactors have provided a significant amount of new data on the ratio of the gaseous (131)I fraction to total (131)I, both on a spatial scale and its temporal variation. It can be pointed out that during the Fukushima event, the (134)Cs to (137)Cs ratio proved to be different from that observed after the Chernobyl accident. The data set provided in this paper is the most comprehensive survey of the main relevant airborne radionuclides from the Fukushima reactors, measured across Europe. A rough estimate of the total (131)I inventory that has passed over Europe during this period was <1% of the released amount. According to the measurements, airborne activity levels remain of no concern for public health in Europe.
334 citations
••
TL;DR: In this paper, the authors examined the energy use and greenhouse gas emissions associated with the production and transport to a port in Sweden (wholesale point) of 84 common food items of animal and vegetable origin.
293 citations
••
TL;DR: Yersinia pestis strain EV76 was constructed and found to be unable to express F1 polymer on the bacterial surface, which suggests that F1 prevents uptake by interfering at the level of receptor interaction in the phagocytosis process.
Abstract: Yersinia pestis, the causative agent of plague, expresses a capsule-like antigen, fraction 1 (F1), at 37°C. F1 is encoded by the caf1 gene located on the large 100-kb pFra plasmid, which is unique to Y. pestis. F1 is a surface polymer composed of a protein subunit, Caf1, with a molecular mass of 15.5 kDa. The secretion and assembly of F1 require the caf1M and caf1A genes, which are homologous to the chaperone and usher protein families required for biogenesis of pili. F1 has been implicated to be involved in the ability of Y. pestis to prevent uptake by macrophages. In this study we addressed the role of F1 antigen in inhibition of phagocytosis by the macrophage-like cell line J774. The Y. pestis strain EV76 was found to be highly resistant to uptake by J774 cells. An in-frame deletion of the caf1M gene of the Y. pestis strain EV76 was constructed and found to be unable to express F1 polymer on the bacterial surface. This strain had a somewhat lowered ability to prevent uptake by J774 cells. Strain EV76C, which is cured for the virulence plasmid common to the pathogenic Yersinia species, was, as expected, much reduced in its ability to resist uptake. A strain lacking both the virulence plasmid and caf1M was even further hampered in the ability to prevent uptake and, in this case, essentially all bacteria (95%) were phagocytosed. Thus, F1 and the virulence plasmid-encoded type III system act in concert to make Y. pestis highly resistant to uptake by phagocytes. In contrast to the type III effector proteins YopE and YopH, F1 did not have any influence on the general phagocytic ability of J774 cells. Expression of F1 also reduced the number of bacteria that interacted with the macrophages. This suggests that F1 prevents uptake by interfering at the level of receptor interaction in the phagocytosis process.
293 citations
••
TL;DR: This work constructs a stable high-order finite difference scheme for the compressible Navier-Stokes equations, that satisfy an energy estimate, and shows the theoretical third-, fourth-, and fifth-order convergence rate, for a viscous shock, where the analytic solution is known.
281 citations
Authors
Showing all 1417 results
Name | H-index | Papers | Citations |
---|---|---|---|
Anders Larsson | 80 | 1307 | 33995 |
Anders Johansson | 75 | 538 | 21709 |
Anders Eriksson | 68 | 679 | 19487 |
Dan S. Henningson | 66 | 369 | 19038 |
Bengt Johansson | 66 | 635 | 19206 |
Anders Sjöstedt | 63 | 196 | 11422 |
Björn Johansson | 62 | 637 | 16030 |
Mats Gustafsson | 61 | 520 | 18574 |
D. G. Joakim Larsson | 58 | 151 | 13687 |
Anders Larsson | 54 | 198 | 55761 |
Mats Tysklind | 53 | 250 | 17534 |
Jerker Fick | 51 | 143 | 8787 |
Erik Johansson | 50 | 114 | 9437 |
Göran Finnveden | 49 | 193 | 12663 |
Ian A. Nicholls | 45 | 194 | 7522 |