SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Persson Anders) ;spr:eng;mspu:(conferencepaper)"

Sökning: WFRF:(Persson Anders) > Engelska > Konferensbidrag

  • Resultat 51-60 av 282
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
51.
  •  
52.
  •  
53.
  •  
54.
  • Dessmark, Anders, et al. (författare)
  • On the approximability of maximum and minimum edge clique partition problems
  • 2006
  • Ingår i: Conferences in Research and Practice in Information Technology Series. - 1920682333 ; 168, s. 101-105
  • Konferensbidrag (refereegranskat)abstract
    • We consider the following clustering problems: given a general undirected graph, partition its vertices into disjoint clusters such that each cluster forms a clique and the number of edges within the clusters is maximized (Max-ECP), or the number of edges between clusters is minimized (Min-ECP). These problems arise naturally in the DNA clone classification. We investigate the hardness of finding such partitions and provide approximation algorithms. Further, we show that greedy strategies yield constant factor approxi mations for graph classes for which maximum cliques can be found efficiently.
  •  
55.
  • Dévai, Gergely, et al. (författare)
  • Efficient Code Generation from the High-level Domain-specific Language Feldspar for DSPs
  • 2010
  • Ingår i: ODES-8: 8th Workshop on Optimizations for DSP and Embedded Systems, workshop associated with IEEE/ACM International Symposium on Code Generation and Optimization (CGO).
  • Konferensbidrag (refereegranskat)abstract
    • Software for digital signal processors (DSPs) is traditionally highly hardware-dependent and hence porting it to new processors usually requires significant design effort. In this paper we present Feldspar (Functional Embedded Language for DSP and Parallelism), an embedded, high-level, domain-specific language for DSP algorithm design and the compilation techniques we developed for generating C code from specifications written in Feldspar. While Feldspar allows description of algorithms on specification level, we show that with the right set of abstractions and transformations this high level, functional specification can be transformed into C code that is comparable or better than reference, hand-crafted C language implementations. The Feldspar compiler is highly modular and plugin-based, hence future hardware-specific plugins will enable automatic generation of efficient, hardware-specific code. This approach enables the encapsulation of knowledge of hardware completely in the compiler and thus allows description of algorithms in completely hardware-independent, portable manner.
  •  
56.
  • Diego, Guénot, et al. (författare)
  • Simultaneous X-ray absorption and two-photon LIF for imaging the spray formation region
  • 2019
  • Ingår i: ILASS–Europe 2019, Proceedings of the 29th Conference on Liquid Atomization and Spray Systems, 2-4 September 2019, Paris, France.
  • Konferensbidrag (refereegranskat)abstract
    • Imaging the spray formation region of atomizing sprays is particularly challenging due to the presence of a variety of irregular liquid structures such as ligaments, liquid blobs, droplets, liquid sheets and a possible liquid core. The number and concentration of those liquid bodies dictate the presence of liquid/air interfaces, which are responsible to undesired scattering effects. The resulting images are blurred, ultimately concealing the real structure of the spray formation region. Due to both, scattering effects and the presence of highly irregular 3D liquid structures, the only reliable measurement of liquid mass in the spray formation region is obtained using X-ray radiography. The generation of collimated X-rays pulsed has been done, in the past, by means of a synchrotron, thus limiting the number of studies that can be performed.In parallel to the use of X-rays, progresses in advanced laser imaging techniques for suppressing multiple scattering issues have been particularly important over the past decade. A very recent solution consists in using 2-photon excitation LIF laser sheet imaging.In this paper, we report for the first time the possibility of simultaneously imaging an atomizing spray using X-ray absorption and 2-photon LIF planar imaging, where the simultaneous single-shot recordings are made over a ~20mmx20mm viewed area. The spray is generated from a commercial fuel port injection system from which, water was injected. The unique illumination/detection scheme proposed here was made possible thanks to the use of X-rays emitted from a laser plasma accelerator (Betatron radiation). For this experiment, we use the High Intensity Laser system at Lund University that provides on target 800mJ, 38fs laser pulses. The emitted X-ray radiation is ranging from 1 to 10keV and peaking at ~2keV. It propagates outside of the vacuum chamber where an X-ray camera records the shadow of the liquid jet. In addition to that, a fraction of the laser pulse ~10mJ is directed on the liquid jet and focuses with a cylindrical lens where it induces fluorescence from a 2-photon excitation process in a dye -here, fluorescein- added to the liquid. The 2p-LIF images provide details on the size and shape of the liquid structures, optically sectioned by the light sheet, while the integrated liquid mass is extracted from the X-ray radiography. This is making the two imaging techniques highly complementary for the characterization of spray systems as well as for further understanding the physics related to liquid atomization.
  •  
57.
  • Echeverri Correa, Estefania, et al. (författare)
  • Reducing the dissolution rate of silicon nitride coatings for spinal implants using Fe and C as alloying elements
  • 2023
  • Konferensbidrag (refereegranskat)abstract
    • INTRODUCTION: Wear and corrosion may lead to a release of particles and ions from spinal implants, which is a concern because of their potentially detrimental effect on the life span of the implant [1]. Silicon nitride-based coatings have been suggested as an option to reduce the release of metal ions from an implant. In addition, any particles produced will slowly dissolve, releasing only biocompatible ions [2]. It is of high interest to reduce the dissolution rate of the coating to ensure an adequate lifetime [3]. The present study aimed to assess the effect of Fe and C additions to silicon nitride coatings in terms of dissolution rate as well as the impact of the released ions on the in vitro neural cell response.METHODS: Using a combinatorial approach, SiFeCN coatings were deposited on CoCr disc substrates by reactive sputtering in an in-house built equipment. The coatings were characterized in 9 points using x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The dissolution behaviour was evaluated by exposing the coated samples to cell media for 14 days. The obtained extracts were used to measure ion release with inductively coupled plasma - optical emission spectrometry (ICP-OES) and to assess cell viability of microglia (C8-B4 cell line) using the MTT assay. RESULTS: The XPS results showed compositional gradients of Si ranging from 35.0 to 47.3 at.%, Fe from 1.4 to 9.3 at.% and C from 4.5 to 13.9 at.%. SEM of focused ion beam (FIB) cross-sections revealed coating thicknesses between 427-534 nm. SEM of the coating after exposure showed substantial signs of dissolution with visibly increased porosity for the SiN coating, while the SiFeCN coatings appeared less affected. SiFeCN coatings appeared more affected by dissolution for increasing Si contents. The estimated dissolution rate of the SiN coating was 8.3 nm/day, while the rate of SiFeCN coatings was 5.2-6.8 nm/day. The ICP results showed a reduction in Co ions from the substrate in the coated samples compared to uncoated CoCr. Moreover, the levels of detected Si ions were lower for the SiFeCN compared to SiN reference. Indirect biocompatibility tests suggested that microglia cell viability was comparable for the SiFeCN coatings, the uncoated CoCr and the SiN coating.DISCUSSION & CONCLUSIONS: The compositional gradients influenced the thickness of the coating, giving a slight thickness increase in the coatings with the increment of Si content. In addition, the ICP results showed the capability of the coating to act as a barrier to the release of ions from the substrate. Furthermore, the presence of Fe and C in the coating causes a decrease in the ion release from the coating, indicative of a lower dissolution rate, which was supported by the thickness measurements. The findings from this study indicate that using Fe and C as alloying elements can lower the dissolution rate of the silicon nitride-based coating while showing positive indications of biocompatibility on neural cells. Therefore, SiFeCN coatings merit further investigation as a future option for spinal implants.REFERENCES: 1Y. Shimamura et al (2008) Spine. 33:351–355. 2M.  Pettersson et al (2016) ACS Biomater. Sci. Eng. 2:998–1004. 3C. Skjöldebrand et al (2022) Biomater Sci, 10:3757–3769.ACKNOWLEDGEMENTS: This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 812765 and from the European Union’s Seventh Framework Programme (FP7/2007-2013), grant agreement GA-310477(LifeLongJoints).
  •  
58.
  •  
59.
  • Eklund, Anders J., et al. (författare)
  • Triple mode-jumping in a spin torque oscillator
  • 2013
  • Ingår i: 2013 22nd International Conference on Noise and Fluctuations, ICNF 2013. - New York : IEEE conference proceedings. - 9781479906680 ; , s. 6578965-
  • Konferensbidrag (refereegranskat)abstract
    • In a nano-contact Co/Cu/NiFe spin torque oscillator, mode-jumping between up to three frequencies within 22.5-24.0 GHz is electrically observed in the time domain. The measurements reveal toggling between two states with differing oscillation amplitude, of which the low-amplitude state is further divided into two rapidly alternating modes. Analysis of the mode dwell time statistics and the total time spent in each mode is carried out, and it is found that in both aspects the balance between the modes is greatly altered with the DC drive current.
  •  
60.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 51-60 av 282
Typ av publikation
Typ av innehåll
refereegranskat (183)
övrigt vetenskapligt/konstnärligt (99)
Författare/redaktör
Persson, Anders (64)
Persson, Henry (18)
Persson, Kent (12)
Lönnermark, Anders (12)
Blomqvist, Per (10)
Larsson, Ida (9)
visa fler...
Axelsson, Emil, 1978 (9)
Lundell, Björn (9)
Persson, Anders, 197 ... (9)
Smedby, Örjan, 1956- (8)
Thornell, Greger (8)
Ottosson Gadd, Tony, ... (7)
Sandberg, Göran (7)
Heyden, Anders (7)
Lönnermark, Anders, ... (7)
Gardelli, Viktor (7)
Persson, Tomas (6)
Backman, Ylva (6)
Sjöström, Anders (6)
Svenningsson, Josef, ... (6)
Ynnerman, Anders (6)
Wahlström, Claes-Gör ... (5)
Ström, Erik, 1965 (5)
Brismar, T (5)
Sandborg, Michael (5)
Hogland, William (5)
Gustavsson, Tomas (5)
Hedström, Anders (5)
Persson, Mikael, 195 ... (5)
Bard, Delphine (5)
Kadi, Nawar, Profess ... (5)
Brax, Christoffer (5)
Gamalielsson, Jonas (5)
Persson, Anders, 197 ... (5)
Nguyen, Hugo, 1955- (4)
Eriksson, Anders (4)
Fridell, Erik, 1963 (4)
Skoglundh, Magnus, 1 ... (4)
Carlsson, Per-Anders ... (4)
Persson, Hans (4)
Tibell, Lena, 1952- (4)
Persson, Cecilia (4)
Persson, Roger (4)
Tegenfeldt, Jonas O. (4)
Persson, Anna (4)
Sheeran, Mary, 1959 (4)
Lings, Brian (4)
Haglund, Liza (4)
Kristensen, Anders (4)
Thormählen, Peter, 1 ... (4)
visa färre...
Lärosäte
Linköpings universitet (80)
Lunds universitet (59)
Chalmers tekniska högskola (36)
Uppsala universitet (24)
RISE (15)
Göteborgs universitet (11)
visa fler...
Högskolan i Skövde (10)
Kungliga Tekniska Högskolan (9)
Mälardalens universitet (8)
Luleå tekniska universitet (7)
Högskolan i Borås (7)
Mittuniversitetet (6)
Umeå universitet (4)
Linnéuniversitetet (4)
Högskolan i Halmstad (3)
Jönköping University (3)
Högskolan Kristianstad (2)
Malmö universitet (2)
Södertörns högskola (2)
Sveriges Lantbruksuniversitet (2)
Örebro universitet (1)
Karlstads universitet (1)
Karolinska Institutet (1)
Blekinge Tekniska Högskola (1)
VTI - Statens väg- och transportforskningsinstitut (1)
visa färre...
Språk
Forskningsämne (UKÄ/SCB)
Naturvetenskap (80)
Teknik (80)
Samhällsvetenskap (32)
Medicin och hälsovetenskap (21)
Humaniora (11)
Lantbruksvetenskap (2)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy