Digitalisierung in der Immobilienwirtschaft

DIGITALISIERUNG IN DER IMMOBILIENWIRTSCHAFT Digitalisierung in der Immobilienwirtschaft / Bölting, Torsten (Rights reserved) ( -

An infrared light-guide based target positioning system for operation in a harsh environment

In the PANDA experiment’s hypernuclear and hyperatom setup, a positioning system for the primary production target is required, which will be located in the center of the solenoid magnet, in ultra-high vacuum, and exposed to high radiation levels. In this work, a prototype for a positioning sensor was built using a bisected light guide for infrared light and a low-priced readout system based on microcontrollers. In contrast to many modern positioning systems that require electronics in direct proximity, this setup has no active electronic components close to the moving parts. The prototype system was operated with a resolution of better than 5 μm, and with a repeatability of better than ±18 μm in a total of 14 000 measurements. The demonstrated performance is by far satisfying the positioning requirement of ±300 μm in the hypernuclear and hyperatom setup at PANDA

Exploring the neutron skin by hyperon–antihyperon production in antiproton–nucleus interactions

In this work we propose a new method to measure the evolution of the neutron skin thickness between different isotopes. We consider antiproton–nucleus interactions close to the production threshold of ΛΛ̅ and Σ− Λ̅ pairs. At low energies, ΛΛ̅ pairs are produced in p̅ + p collisions, while Σ−Λ̅ pairs can only be produced in p̅ + n interactions. Measuring these cross sections provides information on the neutron skin thickness

Has the neutral double hypernucleus ∧∧4n{}_{\wedge}^{}{}_{\wedge}^4\rm{n} been observed?

The BNL-AGS E906 experiment was the first fully electronic experiment to produce and study double hypernuclei with large statistics. Unfortunately, the interpretation of the measured $\pi^{−}−\pi^{−}$ momentum correlation is still blurry because the hypothesized production of ${}_{\Lambda }^{3}\rm{H}{+}_{\Lambda }^{4}\rm{H}$ pairs remains questionable. We show, that neither a scenario where the hypernuclei are produced after the capture of a stopped $\Xi^-$ by a $^9$Be nucleus nor interactions of energetic $\Xi^-$ with $^9$Be nuclei in the target material can produce a sufficient amount of such pairs. We have therefore explored the conjecture that decays of the $_{\Lambda}^{~}{}_{\Lambda}^4\rm{n}$ may be responsible for the observed structure. Indeed, the inclusion of $_{\Lambda}^{~}{}_{\Lambda}^4\rm{n}$ with a two-body $\pi^-$ branching ratio of 50% in the statistical multifragmentation model allows to describe the E906 data remarkably well

Has the neutral double hypernucleus nΛΛ4 been observed?

The BNL-AGS E906 experiment was the first fully electronic experiment to produce and study double hypernuclei with large statistics. Two dominant structures were observed in the correlated π−–π− momentum matrix at (pπ−H,pπ−L)=(133,114)MeV/c and at (114,104)MeV/c. In this work we argue that the interpretation of the structure at (133,114)MeV/c in terms of Λ3H+Λ4H pairs is questionable. We show, that neither a scenario where these single-Λ hypernuclei are produced after capture of a stopped Ξ− by a 9Be nucleus nor interactions of energetic Ξ− with 9Be nuclei in the target material can produce a sufficient amount of such twin pairs. We have therefore explored the conjecture of Avraham Gal that decays of the Image 1 may be responsible for the observed structure. Indeed, the inclusion of Image 1 with a two-body π− branching ratio of 50% in a statistical multifragmentation model allows to describe the E906 data remarkably well. On the other hand, a bound Λ3n nucleus would cause a striking structure in the momentum correlation matrix which is clearly inconsistent with the observation of E906. Keywords: Hypernuclei, Statistical decay mode

Marktbericht Wohnen für Ältere in Berlin

* Die absolute Anzahl Älterer in Berlin steigt bis 2030 auf 844.000 Personen, der Anteil der Hoch-altrigen wächst dabei von 4,7% in 2015 auf 6,9% (263.000 Personen) in 2030. * Die Wohnwünsche der Berliner Bevölkerung für das Leben im Alter - Selbstbestimmung, Eigenständigkeit, Privatsphäre - folgen den bundesweiten Trends, die Akzeptanz alternativer Wohnformen liegt aber deutlich über Bundesdurchschnitt. * Wohnen wird weiterhin teurer. Nicht nur in zentralen Lagen, sondern auch am Stadtrand gab es deutliche Mietpreissteigerungen in den letzten fünf Jahren. * Die Bautätigkeit hinkt der Nachfragentwicklung hinterher. Allein in den letzten drei Jahren wurden mehr als 25.000 neue Wohneinheiten errichtet, angesichts der veränderten Nachfragestruktur bei weitem nicht ausreichend. * Gefragt sind vor allem barrierearme Wohnungen mittlerer Größe. * Die älteren Berliner möchten im Durchschnitt in 23 qm kleineren Wohnungen leben. Würden und könnten sie ihrem Wunsch folgen und sich kleiner setzen, so könnten hochgerechnet über 200.000 Wohnungen ab 100 qm in Berlin frei werden