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High efficiency, low total harmonic distortion (THD), and near-unity power factor are essential for low voltage battery charging systems to satisfy modern power quality requirements. In this study, an isolated totem-pole power factor correction (PFC) integrated buck converter has been designed and analyzed for low-voltage battery charging applications. The proposed topology combines a bridgeless t
Lifetimes of states in two rotational bands in 108Sn and one in 109Sb have been determined using the Doppler shift attenuation method. The deduced quadrupole moments for the states are in excellent agreement with cranked Nilsson model predictions, which imply a gradual change in the nuclear shape from collective near-prolate at medium spin to noncollective oblate at high spin. This change results
High-spin states in the odd-[Formula Presented] nucleus have been investigated with the [Formula Presented] reaction at 94 MeV using the Chalk River [Formula Presented] array. Three decoupled [Formula Presented] rotational bands extending to spins [Formula Presented] in the range [Formula Presented] have been identified and connected to known low-lying states. Experimental observations for the mos
The level structure of 102Pd has been investigated using data collected with the Eurogam 2 array. Several cascades of γ-rays have been established up to high spins. Termination of rotational bands has been observed at Iπ = 28 - and 32 +, and tentatively at Iπ = 38+ and 42+. The nucleus 102Pd is the first case where rotational bands built on valence space configurations are followed from spin close
High-spin states in the nucleus [Formula Presented]Te have been studied with the reaction [Formula Presented]Ni[Formula Presented]Fe,[Formula Presented] at 236 MeV using an early implementation of the Gammasphere array. Three rotational bands extending to spins [Formula Presented] and excitation energies [Formula Presented] MeV have been identified and connected to known low-lying states. In the m
The level structure of 102Rh has been investigated using the EUROGAM Phase2 array. Bands observed up to high spins are discussed in terms of band terminations. 102Rh is the first doubly odd nucleus below Z = 50 in which band terminations are established.
The highest-spin discrete states (I ∼ 60 ℏ and Ex ∼ 30 MeV) in normal deformed nuclei have been observed in the rare-earth isotope 156Dy using the 124Sn(36S,4n) reaction in conjunction with the GAMMASPHERE spectrometer. The positive parity yrast sequence appears to evolve smoothly from a prolate (collective) towards an oblate (non-collective) shape, in contrast to the sudden shape change observed
Four new superdeformed bands have been found in the nucleus 86Zr. The good agreement between experiment and configuration-dependent shell correction calculations suggests that three of the bands have triaxial superdeformed shapes. Such unique features in mass A ∼ 80 superdeformed bands have been predicted, but not observed experimentally until now. A fourth band in 86Zr is interesting due to a fai
Excited states in [Formula Presented] have been observed with the Stony Brook array of six Compton-suppressed HPGe detectors and the [Formula Presented] reaction at 60 MeV using a thick target. New excited states which decay solely towards the [Formula Presented] ns, [Formula Presented] isomer have been identified using time-correlated spectroscopy. The previously known level scheme has also been
Six rotational bands in the odd-odd nucleus 174Ta have been populated with the 160Gd(19F,5n) reaction. High-spin states were identified using the NORDBALL array. Both signatures of the doubly decoupled π1/2- [541 ] ⊗ v1/2- [521] band and semi-decoupled π1/2- [541] ⊗ v7/2+ [633] band are observed, in addition to the high-K couplings of the π9/2- [514] ⊗ v7/2+ [633], π9/2- [514] ⊗ v5/2- [512], π7/2+
Collaboration is expected to play a central role in the transition to abioeconomy—a central pillar of a green economy. Such collaboration is supposed to connect traditional biomass processing firms with diverse actors infields where biomass ought to substitute existing or create novel productsand processes. This study analyzes the network of technology collaborationsamong innovating firms in Swede
The thesis assesses the role of grassroots organisations in climate action through sustainable food practices, focusing on social innovation, collective learning, community-building and local resilience inside the city of Lund, in the Skåne region of southern Sweden. It intends to understand how local groups, combining practical knowledge with community-based innovations, collaborate to build a cu
High spin states of 101Rh have been populated using the reaction 70Zn+36S at 130 MeV. γ-rays were detected with the EUROGAM2 array. New high-spin bands have been observed in this nucleus up to 45/2-, 57/2- and 65/2+ states. They have been interpreted using the Nilsson-Strutinsky cranking formalism as terminating configurations. Two of the bands were observed up to the predicted terminating states
High-spin states have been populated in [Formula Presented] via the [Formula Presented] reaction at 150 MeV, using the EUROGAM II [Formula Presented]-ray spectrometer to record high-fold [Formula Presented]-ray coincidences. A quadruples [Formula Presented]-ray analysis [Formula Presented] has been used to extend the known level scheme. In addition to several aligned noncollective states, a new hi
Very high spin (50-60(Latin small letter h with stroke)) states in transitional 156Dy, 159Er and 160Er nuclei have been studied using the GAMMASPHERE and EUROGAM γ-ray spectrometers. The lowest energy positive-parity bands in 156Dy are found to evolve smoothly towards an oblate shape in contrast to the sudden change observed in the neighbouring 158Er nucleus. In 159Er, the decay path of the positi
Three rotational bands have been discovered in the nucleus Sb109 that extend in angular momentum to 81/2Latin small letter h with stroke. The rotational frequency at the highest spins reaches Latin small letter h with strokeω1.4 MeV, the highest frequency so far observed in a heavy nucleus. With increasing frequency the collective moments of inertia of all three bands smoothly diminish to unexpect
Hyperfine structure measurements have been performed in some neutron-deficient gold isotopes, using on-line atomic-beam magnetic resonance (ABMR) techniques at the ISOLDE facility, CERN. The following results have been obtained: 185Au, I = 5/2; 187Au, Δv = 44.35(60) GHz, μ = 0.72(7) n.m. and 188Au, Δv = ± 2992(30) MHz. A discussion of the influence of the hyperfine anomaly is included. With due re
The reactions 78Kr( alpha ,n) and 80Kr( alpha ,3n) were used to populate excited states in 81Sr. The de-excitation of these states was studied by in-beam gamma -ray spectroscopy. A number of new high-spin states forming band structures have been observed. Lifetime measurements have also been performed. Theoretical calculations using a particle-rotor approach based on the Nilsson model have been ma
High spin states in 127,129,131La have been investigated using the 100Mo(32S,p4n), E= 160 MeV, 100Mo(34S,p4n), E=155 MeV, and 100Mo(36S,p4n), E=160 MeV reactions, respectively. γ rays were detected using the EUROBALL IV (127,131La) and EUROGAM II (129La) arrays. The results have enabled the negative parity yrast band, built on the πh 11/2 orbital at low spin, and the lowest lying (π, α) = (+, ± 1/
