TY - GEN A1 - Zimmermann, Gregor A1 - Sablotny, Tino A1 - Vukorep, Ilija T1 - Robot-Controlled Fabrication of Sprayed Concrete Elements as a Cyber-Physical-System T2 - Second RILEM International Conference on Concrete and Digital Fabrication N2 - In order to make the mass production of free-formed concrete elements for architectural and engineering projects possible and financially achievable new ways of production has to be developed. This paper presents a robot-controlled fabrication of sprayed concrete elements as a cyber-physicalsystem. It utilizes the concept of Industry 4.0 and IoT-technology together with automatized fabrication methods and developed sophisticated software solutions for communication, planning, modeling and analyzing. This concept bases on a decentralized system of fabrication, analytic and path-planning services connected with a mqtt-communication protocol. Next to the system- and software development a special material based on concrete is developed, shotcrete, which is adapted to needs for the application of spraying. KW - Concrete façade elements KW - Robotic fabrication KW - UHPC KW - Shotcrete KW - Cyber physical system KW - Industry 4.0 Y1 - 2020 SN - 978-3-030-49915-0 U6 - https://doi.org/10.1007/978-3-030-49916-7_94 SN - 2211-0852 SP - 967 EP - 977 PB - Springer CY - Cham, Schweiz ER - TY - GEN A1 - Küppers, Manfred A1 - Küppers, Barbara I. L. A1 - Horna, Viviana A1 - Veste, Maik A1 - Zimmermann, Reiner A1 - Lauerer, Marianne A1 - Aas, Gregor T1 - Green barks of trees from drought deciduous forests ("bosque seco") in northern Peru/southern Ecuador do not perform CAM T2 - Basic and Applied Dryland research N2 - Trees from drought deciduous forests (“bosque seco”) in northern Peru and southern Ecuador regularly shed their leaves at the onset of seven months-long periods without rain. This way they very effectively reduce the bulk water consumption by leaf transpiration, still loosing small amounts of water through their bark, but at the risk of too little or no carbon gain when leaf-less. Seven species studied here have good developed green cortex tissue on stems and axes, as especially evident for the “bottle tree” Ceiba trischistandra (A. Gray) Bakhuisen (Bombacaceae). In several leaf-less tree species at the end of summer drought, when xylem sap flows are very low, indications of higher xylem flows at night as compared to day-time were found, which led to the question of whether the trees are capable of performing CAM in their axes. However, although quite low in some cases, the pH of the cortex tissues did not fluctuate diurnally. In addition, no night-time carbon uptake could be observed. Although no net carbon gain was measured in C. trischistandra and Erythrina smithiana Krukoff (Fabaceae) photosynthetic activity of the green cortex was sufficient to re-assimilate between 50% to 60% of the carbon released by mitochondrial respiration. In contrast, the obligate CAM plant Cereus diffusus (Britton & Rose) Werdermann (Cactaceae), which was studied as a reference in the same environment, showed both diurnal pH-fluctuations in its green tissue with lowest values before sun rise, and net carbon fixation at night. Y1 - 2015 UR - https://www.researchgate.net/publication/280945188 U6 - https://doi.org/10.1127/badr/2015/0002 SN - 1864-3191 ER -