Björn Sjögreen
Lawrence Livermore National Laboratory
111 Papers
1K Citations
Björn Sjögreen is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Finite difference & Finite difference method. The author has an hindex of 31, co-authored 109 publications. Previous affiliations of Björn Sjögreen include Uppsala University & Chalmers University of Technology.
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Papers
The real-time polymerase chain reaction
Mikael Kubista,José Manuel Andrade,Martin Bengtsson,Amin Forootan,Jiri Jonák,Kristina Lind,Radek Sindelka,Robert Sjöback,Björn Sjögreen,Linda Strömbom,Anders Ståhlberg,Neven Zoric +11 more
TL;DR: The scientific, medical, and diagnostic communities have been presented the most powerful tool for quantitative nucleic acids analysis: real-time PCR, a refinement of the original Polymerase Chain Reaction (PCR) developed by Kary Mullis and coworkers in the mid 80:ies.
1.5K
On Godunov-type methods near low densities
TL;DR: In this article, the Harten-Lax-van Leer (HLLE) scheme is positively conservative under certain conditions on the numerical wavespeeds, and this observation allows the linearised schemes to be rescued by modifying the wave-peeds employed.
1K
Methods to determine limit of detection and limit of quantification in quantitative real-time PCR (qPCR).
TL;DR: This work presents methods to determine the limit of detection (LoD) and thelimit of quantification (LoQ) as applicable to qPCR, based on standard statistical methods as recommended by regulatory bodies adapted toqPCR and complemented with a novel approach to estimate the precision of LoD.
486
Assessment of high-resolution methods for numerical simulations of compressible turbulence with shock waves
Eric Johnsen,Johan Larsson,Ankit Bhagatwala,William H. Cabot,Parviz Moin,Britton J. Olson,Pradeep S. Rawat,Santhosh K. Shankar,Björn Sjögreen,Helen C. Yee,Xiaolin Zhong,Sanjiva K. Lele +11 more
TL;DR: The results indicate that the WENO methods provide sharp shock profiles, but overwhelm the physical dissipation, and the hybrid method is minimally dissipative and leads to sharp shocks and well-resolved broadband turbulence, but relies on an appropriate shock sensor.
405
Multiresolution Wavelet Based Adaptive Numerical Dissipation Control for High Order Methods
Björn Sjögreen,Helen C. Yee +1 more
TL;DR: To minimize the tuning of parameters and physical problem dependence, new sensors with improved detection properties are proposed, derived from utilizing appropriate non-orthogonal wavelet basis functions and they can be used to completely switch off the extra numerical dissipation outside shock layers.