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An optimization approach to a multi-dimensional acoustic inverse problem in the time domain is considered. The density and/or the velocity are reconstructed by minimizing an objective functional. By introducing dual functions and using the Gauss divergence theorem, the gradient of the objective functional is found as an explicit expression. The parameters are then reconstructed by an iterative alg
Several Danish exposures and one drill core spanning the upper Oligocene-upper Miocene interval of the Cenozoic (i.e., 24–5 Myr ago) were palynologically investigated. The sediments were deposited in alternating deltaic, marginal marine and fully marine settings, and reveal a rich and diverse miospore flora, associated with abundant dinoflagellate cysts. The results consistently demonstrate that c
In FSE 2010, Rønjom and Cid put forward a nonlinear equivalence for Boolean functions and demonstrated that many cryptographic properties are not invariant among functions within the same equivalence class by providing some special examples. Their paper presented the idea and many problems were left open.In this paper, we investigate equivalence of Boolean functions more deeply using a new method
Hamming code-based LDPC (H-LDPC) block codes are obtained by replacing the single parity-check constituent codes in Gallager's LDPC codes with Hamming codes. This paper investigates the asymptotic performance of ensembles of random H-LDPC codes, used over the binary symmetric channel and decoded with a low-complexity hard-decision iterative decoding algorithm. It is shown that there exist H-LDPC c
Popular Abstract in Swedish Innovationer är livsviktiga för de flesta företags långsiktiga tillväxt och överlevnad. Det gäller även livsmedelssektorn i Sverige som här har undersökts med avseende på tre grupper av aktörer: handel, livsmedelsproducenter och förpackningsleverantörer. Målsättningen var att undersöka om det finns ett gap mellan hur dessa olika aktörer ser på innovation och hur de genoThe food sector in Sweden, comprised of retailers, food manufacturers and packaging suppliers, has been investigated, guided by two research questions: What does “innovation” mean to the different actors (i.e. is there a gap in opinions)? How is innovation performed and what are the key issues? But before this research of the present, the past was studied (the author’s licentiate) to identify and
