Untersuchung der Photoproduktion des Vektormesons Φ (1020) und des Hyperons Λ (1520) von der Erzeugungsschwelle bis zu einer Photonenergie von 2,65 GeV mit SAPHIR

In dieser Arbeit wird die Photoproduktion des Vektormesons Φ (1020) und des Hyperons Λ (1520) im Endzustand pK von der Schwellenenergie bis zu 2,65 GeV untersucht. Die Daten wurden mit dem 4ð Detektor SAPHIR an ELSA gemessen. Die t-Abhängigkeit der F Produktion weist einen exponentiellen Verlauf auf, wie er bei einem diffraktiven Produktionsmechanismus erwartet wird. Die s-Kanal Helizitätserhaltung kann in der Zerfallswinkelverteilung im Helizitätssystem beobachtet werden. Die Zerfallswinkelverteilung im Gottfried-Jackson-System entspricht nicht den Vorhersagen, die sich durch Pomeronaustausches im t-Kanal ergeben. Zum ersten Mal konnten differentielle Wirkungsquerschnitte der Λ (1520)-Photoproduktion von der Schwelle an gemessen werden. Die Produktionswinkelverteilung und die Zerfallswinkelverteilung im Gottfried-Jackson-System entsprechen einem K*-Austausch im t-Kanal.The photoproduction of the vectormeson Φ (1020) and the hyperon Λ(1520) have been measured in the finale state pK+K-from their thresholds up to 2.65 GeV using the high duty-factor electron accelerator ELSA and the 4π-detectorsystem SAPHIR. The t-dependence of Φ-production shows an exponential behavior as expected from diffractive production. S-channel helicity conservation can be seen in the decay angular distribution in the helicity frame. The decay angular distribution in the Gottfried-Jackson frame is not conformable with the exchange of a Pomeron in the t-channel. For the first time, differential cross sections of the Λ photoproduction from the threshold are measured.The production angular distribution and the decay angular distribution in the Gottfried-Jackson frame show a K* exchange in the t-channel

Quality improvement opportunities for handover practices in birth centres:A case study from a process perspective

Rationale, aims and objectives Handovers within and between health care settings are known to affect quality of care. Health care organizations, struggle how to guarantee best care during handovers. The aim of this paper is to evaluate handover practices in Dutch birth centres from a process perspective, to identify obstacles and opportunities for quality improvements. Methods This case study in 7 Dutch birth centres was undertaken from a process perspective by conducting observations and using process mapping. This study is part of the Dutch Birth Centre Study. Results Solutions to obstacles during handovers from a birth centre to a hospital were identified in at least 1 of the 7 birth centres. Four of the centres had agreements with a hospital for client support when a caregiver in a birth centre was absent. Face‐to‐face communication during handover was observed in 6 of the 7 centres. An electronic health record was noted in 1 centre; joint training of acute situations was available in 2 centres with 3 centres indicating that this was not compulsory. Continuity of caregiver was present in 4 birth centres with postpartum care available in 3 centres. Conclusions Ensuring quality during handovers requires a case‐specific process approach. This study reveals distinctive aspects during handovers, concrete obstacles, and potential solutions for quality improvements in inter‐organizational networks, transferrable to birth centres in other countries as well

Insights into CODE-DE - Germany's Copernicus Data and Exploitation Platform

This article presents and analyses the modular architecture and capabilities of CODE-DE (Copernicus Data and Exploitation Platform - Deutschland, www.code-de.org), the integrated German operational environment for accessing and processing Copernicus data and products, as well as the methodology to establish and operate the system. Since March 2017, CODE-DE has been online with access to Sentinel-1 and Sentinel-2 data, to Sentinel-3 data shortly after this time, and since March 2019 with access to Sentinel-5P data. These products are available and accessed by 1,682 registered users as of March 2019. During this period 654,895 products were downloaded and a global catalogue was continuously updated, featuring a data volume of 814 TByte based on a rolling archive concept supported by a reload mechanism from a long-term archive. Since November 2017, the element for big data processing has been operational, where registered users can process and analyse data themselves specifically assisted by methods for value-added product generation. Utilizing 195,467 core and 696,406 memory hours, 982,948 products of different applications were fully automatically generated in the cloud environment and made available as of March 2019. Special features include an improved visualization of available Sentinel-2 products, which are presented within the catalogue client at full 10 m resolution