Deformations and quasiparticle spectra of nuclei in the nobelium region

We have performed self-consistent Skyrme Hartree-Fock-Bogolyubov calculations for nuclei close to $^{254}$No. Self-consistent deformations, including $\beta_{2,4,6,8}$ as functions of the rotational frequency, were determined for even-even nuclei $^{246,248,250}$Fm, $^{252,254}$No, and $^{256}$Rf. The quasiparticle spectra for N=151 isotones and Z=99 isotopes were calculated and compared with experimental data and the results of Woods-Saxon calculations. We found that our calculations give high-order deformations similar to those obtained for the Woods-Saxon potential, and that the experimental quasiparticle energies are reasonably well reproduced.Comment: 6 pages, 2 figures; ICFN5 conference proceeding

Application of Operator Splitting Methods in Finance

Financial derivatives pricing aims to find the fair value of a financial contract on an underlying asset. Here we consider option pricing in the partial differential equations framework. The contemporary models lead to one-dimensional or multidimensional parabolic problems of the convection-diffusion type and generalizations thereof. An overview of various operator splitting methods is presented for the efficient numerical solution of these problems. Splitting schemes of the Alternating Direction Implicit (ADI) type are discussed for multidimensional problems, e.g. given by stochastic volatility (SV) models. For jump models Implicit-Explicit (IMEX) methods are considered which efficiently treat the nonlocal jump operator. For American options an easy-to-implement operator splitting method is described for the resulting linear complementarity problems. Numerical experiments are presented to illustrate the actual stability and convergence of the splitting schemes. Here European and American put options are considered under four asset price models: the classical Black-Scholes model, the Merton jump-diffusion model, the Heston SV model, and the Bates SV model with jumps

Demokratia ja koulu nopeasti kuumenevassa maailmassa : Miten ekologisen jälleenrakennuksen aikakausi muuttaa demokratian tärkeysjärjestyksiä ja koulun roolia?

Peer reviewe

A Player Bigger Than Its Size: Finnish Bioeconomy and Forest Policy in the Era of Global Climate Politics

Over the last two decades, the bioeconomy has emerged as a key political idea in framing a low-carbon transition. Bioeconomy is particularly important in Finland due to the country’s large forestry sector. The bioeconomy has reframed the Finnish forestry industry as sustainable and placed forestry at the centre of the national economy. This has led to the constitution of a new forest policy regime: the bioeconomy regime. However, in the era of climate mitigation, forests are expected to serve as carbon sinks. Increasing the harvesting of forests, a Finnish bioeconomy policy, would decrease the size of forest sinks, while increasing net emissions from forests. This aspect of climate science has challenged the Finnish bioeconomic strategy. This chapter analyses the emergence of the bioeconomy regime and how the regime has been challenged by climate science. Finally, it examines the communication strategies used and the status of the Finnish bioeconomy on the world stage.Non peer reviewe

Collective vibrational states with fast iterative QRPA method

An iterative method we previously proposed to compute nuclear strength functions is developed to allow it to accurately calculate properties of individual nuclear states. The approach is based on the quasi-particle-random-phase approximation (QRPA) and uses an iterative non-hermitian Arnoldi diagonalization method where the QRPA matrix does not have to be explicitly calculated and stored. The method gives substantial advantages over conventional QRPA calculations with regards to the computational cost. The method is used to calculate excitation energies and decay rates of the lowest lying 2+ and 3- states in Pb, Sn, Ni and Ca isotopes using three different Skyrme interactions and a separable gaussian pairing force.Comment: 10 pages, 11 figure

Uusi aikakausi

Non peer reviewe

Kuka haluaa takaisin normaaliin?

Non peer reviewe

Kolonialismin historia yksissä kansissa

Kirja-arvostelu. Arvosteltu teos: Kivenmurskaajat : kolonialismin historia / Antti Kujala. - Jyväskylä : Atena Kustannus, 2019.Non peer reviewe

Raising the bar on the type, size and timeline of a 'successful' decoupling

Peer reviewe

Study of odd-mass N=82 isotones with realistic effective interactions

The microscopic quasiparticle-phonon model, MQPM, is used to study the energy spectra of the odd $Z=53 - 63$, N=82 isotones. The results are compared with experimental data, with the extreme quasiparticle-phonon limit and with the results of an unrestricted $2s1d0g_{7/2}0h_{11/2}$ shell model (SM) calculation. The interaction used in these calculations is a realistic two-body G-matrix interaction derived from modern meson-exchange potential models for the nucleon-nucleon interaction. For the shell model all the two-body matrix elements are renormalized by the $\hat{Q}$-box method whereas for the MQPM the effective interaction is defined by the G-matrix.Comment: Elsevier latex style espart, 26 pages, submitted to Nuclear Physics