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Name: Mischa Dannerup MaraisAge: 32 Nationality: South African/DanishTell us about your educational and professional background.My educational journey began in Cape Town, where I earned a Diploma in Management. I then relocated to Copenhagen to pursue a Bachelor's degree in Sales and Marketing, and I am advancing my expertise with my now Master's in Strategic Communications. Throughout my studies,

https://www.isk.lu.se/en/what-mischa-says-about-programme - 2026-05-21

In this article we present a downscaled laboratory setup emulating five natural guide stars, a layered static atmosphere and a 7.5-m aperture telescope equipped with dual-conjugate adaptive optics at a wavelength of 2.2 mum. Three reconstruction alternatives were evaluated; conventional adaptive optics, field-averaged conventional adaptive optics and dual-conjugate adaptive optics. The results wer

In this paper we present a precise and reliable measurement of the 1s(2)2p P-2(3/2) lifetime for Li-like Ni. The measurement was done using the technique of beam-foil spectroscopy employing a beam of 5.9 MeV/u Ni from the UNILAC accelerator at GSI. Special attention was taken concerning satellite blending and foil-ageing problems to justify the reliability of the lifetime value extracted from the

Accurate characterization of the errors in the global astrometric solution for Gaia is essential for making optimal use of the catalogue data. We investigate the structure of the covariance between the estimated astrometric parameters by studying the properties of the astrometric least squares solution. We find that astrometric errors can be separated in a star and an attitude part, due to the est

This article presents an on-line tool and its accompanying software resources for the numerical solution of basic radiation transfer out of local thermodynamic equilibrium (LTE). State-of-the-art stationary iterative methods such as Accelerated Lambda-iteration and Gauss-Seidel schemes, using a short characteristics-based formal solver are used. We also comment on typical numerical experiments ass

Gaia DR1 is based on the first 14 months of Gaia's observations. This is not long enough to reliably disentangle the parallax effect from proper motion. For most sources, therefore, only positions and magnitudes are given. Parallaxes and proper motions were nevertheless obtained for about two million of the brighter stars through the Tycho-Gaia astrometric solution (TGAS), combining the Gaia obser

We discuss exclusive elastic double diffractive axial-vector χc(1+) and tensor χc(2+) mesons production for different meson polarizations in proton-(anti)proton collisions at the Tevatron energy. The amplitude for the process is derived within the kt-factorization approach using unintegrated gluon distributions. Differential cross sections for different χc polarizations are calculated. Angular dis

Dynamics of spontaneous decay and corresponding emission spectrum areexactly treated for a system of two identical two-level atoms in 1D.Just a one-dimensional case is considered in order to maximally extractan information on mutual influence of spatially remote atoms through theradiation field. As a result, an effect is revealed and considered indetail that there exist stable (metastable) entangl

Solen har lyst konstant på vår värld i fyra och en halv miljard år. Strålarna som värmer vår hud idag har känts av varenda person som någonsin levt. Solens strålar har rört vid dinosaurier, och hälsat på de första varelser som lämnade havens vatten för ett liv på land.Solen har varit vittne till allting som skett här på Jorden. Men den är ingen passiv iakttagare. Solen är vår planets kraftverk, de

A large vector meson production in quark jet fragmentation implies characteristic differences between the kaon and pion spectra. This prediction is verified in a recent SLAC-MIT experiment. Similar considerations are relevant for the c-quark fragmentation into D-mesons, as observed in ν scattering experiments.The difference in kaon and pion spectra provides a test of the hard quark-quark scatterin

The Rivet library is an important toolkit in particle physics, and serves as a repository for analysis data and code. It allows for comparisons between data and theoretical calculations of the final state of collision events. This paper outlines several recent additions and improvements to the framework to include support for analysis of heavy ion collision simulated data. The paper also presents

Dagens svenska våldtäktslagstiftning kräver att gärningsmannen använt sig av tvång eller utnyttjande för att straffansvar ska föreligga. Det har ifrågasatts om denna utformning av våldtäktslagstiftningen istället borde ersättas med en bestämmelse där samtycke ges en avgörande betydelse. Med en samtyckesbaserad våldtäktsreglering skulle den utslagsgivande faktorn för om ett brott har begåtts eller

I januari 2009 fick en student vid ett vuxengymnasium i Tensta besked om att hon inte tilläts bära niqab i skolan. Niqaben, som är en heltäckande slöja där endast ögonen är synliga, medförde enligt skolan pedagogiska svårigheter såväl som säkerhetsrisker. Händelsen anmäldes till Diskrimineringsombudsmannen och studenten tilläts gå kvar på skolan i väntan på myndighetens beslut. Frågan om dylika heIn January of 2009 a student at an upper secondary school for adults in Tensta was informed that she was not allowed to wear a niqab to school. According to the school board, the niqab, which is a full veil that leaves only the eyes fully visible, implied both security risks as well as pedagogical difficulties. The incident was reported to the Equality Ombudsman, and awaiting the Ombudsman’s decis

The correlation function measured in ultrarelativistic nuclear collisions is strongly non-Gaussian. Using two different models we study which effects can influence its shape and how much. In particular, we focus on the parametrizations expressed with the help of Lévy-stable distributions. We show that the Lévy index may deviate substantially from 2 due to non-critical effects such as resonance dec

The branching ratio of the K+→π+e+e-e+e- (K+→π+4e) decay is calculated at leading order in the Standard Model. The dominance of the neutral-pion pole determines the overall branching ratio to be B(K+→π+4e)=B(K+→π+π0)B(π0→4e)≈7.0(3)×10-6. The significance of this contribution is very much concentrated in the context of the whole available phase space, throughout most of which the one-photon-exchang

A brief pedagogical introduction to correlation femtoscopy is given. We then focus on the shape of the correlation function and discuss the possible reasons for its departure from the Gaussian form and better reproduction with a Lévy stable distribution. With the help of Monte Carlo simulations based on asymmetric extension of the Blast-Wave model with resonances we demonstrate possible influence

Precis som vår egen stjärna, Solen, har planeter kretsande runtom sig så har vi nu börjat upptäcka planeter kretsande runt avlägsna stjärnor därute i Vintergatan. Specialdesignade rymdbaserade teleskop, som COROT och Kepler, tillsammans med markbaserade teleskop, analyserar stjärnornas ljus och letar efter täcken på avlägsna exoplaneter.As there are planets orbiting our own star, the Sun, we have now started discovering planets orbiting distant stars, out in the galaxy. Specially designed space based telescopes, such as COROT and Kepler, are together with ground based telescopes gathering and analyzing light from distant stars, looking for hits that these stars may harbor exoplanets.

The scalar form factors for the pions and kaons are calculated in SU(3) Chiral Perturbation Theory at order p(6), in the isospin limit m(u)=m(d)=(m) over cap. We find in general sizable corrections of O(p(6)). We use our results to obtain information on the 1/N-c suppressed low energy constants L-4(r) and L-6(r) as well as on two O(p(6)) low energy constants. We present some numerical results for

The present status of Chiral Perturbation Theory in the meson sector is discussed concentrating on recent developments. This write-up contains short discussions on a listing of a few historical papers, the principles behind ChPT, two-flavour ChPT including some comments about the Pion polarizability, three-flavour ChPT with a discussion of the recently found relations as tests of ChPT and prelimin