Pipping, Η.: Bidrag till Eddametriken

The decay η ′ c → η

The decay η ′ c → η c π π. Abstract It is pointed out that the decay of the recently observed charmonium η ′ c resonance, η ′ c → η c π π is simply related to the well studied decay ψ ′ → J/ψ π π and can thus be used for absolute normalization of other decay modes of the η ′ c. The total rate of the discussed decay should be approximately three to four times the corresponding rate for the ψ ′ r...

Hadronic η and η ′ decays

The hadronic decays η, η′ → 3π and η′ → ηππ are investigated within the framework of U(3) chiral effective field theory in combination with a relativistic coupled-channels approach. Final state interactions are included by deriving sand p-wave interaction kernels for meson-meson scattering from the chiral effective Lagrangian and iterating them in a Bethe-Salpeter equation. Very good overall ag...

Hugo pipping - a pioneer phonetician at the University of Helsinki

Hugo Pipping was the first person to officially function as a phonetics teacher at the University of Helsinki. His most important contribution to Finnish phonetics was the introduction of scientific physiological research methods into the study of speech. Especially, he used the Phonautograph/Sprachzeichner developed by Victor Hensen in Kiel to manually analyse the spectral structure of vowel s...

Optimizing Strip-Till and No-Till Systems for Corn

Recent developments in biofuel demand and the rapid adoption of modern transgenic hybrids are changing production systems towards more corn after corn, more intensive tillage, higher plant populations, and ever higher crop residue levels at harvest. Meeting society’s needs for food, feed, and fuel from grain corn, and in the future from corn stover, requires continued refinement of tillage syst...

Macropore flow estimations under no-till and till systems