Retinopathy of prematurity – update on screening, treatment, recent studies and long-term outcomes

Retinopathy of prematurity, short ROP, is still one of the leading causes of childhood blindness worldwide. The management of ROP, however, has changed tremendously during the last years. This article summarizes known risk factors for ROP, preventive measures and the updated version of the German recommendations for ROP-screening and treatment. A special focus is laid on new treatment options, in particular anti-VEGF treatment, as well as the post-operative and long-term follow-up after treatment. This article also emphasizes the need for joint data collection on an international level and presents the newly-developed initiative for a European wide data collection (EU-ROP) which will be introduced in 2021. All physicians treating ROP infants are welcome to join the EU-ROP initiative

Local search heuristics for the multidimensional assignment problem

The Multidimensional Assignment Problem (MAP) (abbreviated s-AP in the case of s dimensions) is an extension of the well-known assignment problem. The most studied case of MAP is 3-AP, though the problems with larger values of s also have a large number of applications. We consider several known neighborhoods, generalize them and propose some new ones. The heuristics are evaluated both theoretically and experimentally and dominating algorithms are selected. We also demonstrate that a combination of two neighborhoods may yield a heuristics which is superior to both of its components

Diversity and abundance of solitary and primitively eusocial bees in an urban centre: a case study from Northampton (England)

The apparent reduction of solitary and primitively eusocial bees populations has remained a huge concern over the past few decades and urbanisation is considered as one of the factors affecting bees at different scales depending on bee guild. As urbanisation is increasing globally it necessitates more research to understand the complex community dynamics of solitary and primitively eusocial bees in urban settings. We investigated the urban core of a British town for diversity and abundance of solitary bees using standardized methods, and compared the results with nearby meadows and nature reserves. The study recorded 48 species within the town, about 22 % of the total species and 58 % of the genera of solitary bees in the United Kingdom. Furthermore we found the urban core to be more diverse and abundant in solitary and primitively eusocial bees compared to the meadows and nature re-serves. Of particular note was an urban record of the nationally rare Red Data Book species Coelioxys quadridentata and its host Anthophora quadrimaculata. This research demonstrates that urban settings can contribute significantly to the conservation of solitary and primitively eusocial bees in Britain