Non-topological solitons are localized classical field configurations stabilized by a Noether charge. Friedberg, Lee, and Sirlin proposed simple renormalizable soliton model in their seminal 1976 paper, consisting of complex scalar that carries the charge real-scalar mediator. We revisit this model, point out commonalities differences with Q-ball solitons, provide analytic approximations to und...

Kurzfassung Die Tendenz hin zu kundenorientierten Geschäftsmodellen führt insbesondere bei Finanzdienstleistern zu steigenden Investitionen in IT im Bereich Customer Relationship Management. Vor dem Hintergrund, dass ein Großteil dieser Investitionen nicht den erhofften Erfolg bringt, wird die Notwendigkeit einer ex ante Bewertung von IT-Investitionen in diesem Bereich deutlich. Deshalb wird im...

Seventeen patients with polycystic ovarian disease (peOD) were treated by laparoscopic ovarian electrocauterization (LEC). Ten were admitted to hospital for infertility, four for hirsutism, two for severe scalp hair loss, and one for abnormal uterine bleeding. Four of the patients were virgins. We had 50% (5 of 10) pregnancies and 88% (15 of 17) showing a decline in testosterone levels aft...

We study voting games on binary issues, where voters hold an objective over the outcome of the collective decision and are allowed, before the vote takes place, to negotiate their voting strategy with the other participants. We analyse the voters’ rational behaviour in the resulting two-phase game, showing under what conditions undesirable equilibria can be removed and desirable ones sustained ...

We prove that under mild regularity assumptions on the initial data the two-phase classical Stefan problem admits a (unique) solution that is analytic in space and time.