Lernen, Loesen und Behalten von mathematischen Textaufgaben Eine Untersuchung an Schuelern des 5. Schuljahres

Available from FIZ Karlsruhe / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

On the Implementation of a European Space Traffic Management System III. Technical Requirements.

This third paper (Paper III) concludes the mini series of papers which presents results from an ESA-funded evaluation study that has been collected by DLR GfR and its partner institutes and companies. The objective of this study is to generate a roadmap for the implementation of a European STM system within the next two decades under consideration of an evolving Air Traffic Management (ATM) system. In Paper I (Tüllmann et al. 2017a), we introduced the implementation approach by focussing on the commercial Space Travel market which is expected to develop into a multi-billion Euro business in the coming years and could become a major driver for STM in general. We provided proof of concept that this suborbital space travel is generally possible, given that significant advances in heat and collision shielding technologies can be achieved. The envisioned technical, conceptual and organisational setups were discussed regarding Space Debris, Space Surveillance & Tracking, Space Weather Monitoring, Flight Planning and Scheduling and ATM and STM integration. This work is supplemented by Paper II (Tüllmann et al. 2017b), which discussed Safety & Reliability (S&R) aspects that should be reflected in a S&R concept for the STM system. In this context relevant Safety Management Systems in aviation business were investigated to check to what extent their S&R concepts and good-practices are applicable to STM operations. A first Risk Classification Scheme was presented and initial values for the acceptable levels of safety for the identified hazards were presented and an outline of the envisaged Space Navigation Service Provider (SNSP) certification process was given. In this present work (Paper III) we focus on deriving initial technical high-level requirements and recommendations for a European contribution to Space Traffic Management and define relevant interfaces in the global context. The proposed requirements and interfaces presented here are neither complete nor final and are meant to provide a first rough guidance for space agencies, manufacturers or policy makers and shall stimulate discussions on how a European STM system could be realised

A new class of plastidic phosphate translocators: a putative link between primary and secondary metabolism by the phosphoenolpyruvate/phosphate antiporter.

We have purified a plastidic phosphate transport protein from maize endosperm membranes and cloned and sequenced the corresponding cDNAs from maize endosperm, maize roots, cauliflower buds, tobacco leaves, and Arabidopsis leaves. All of these cDNAs exhibit high homology to each other but only approximately 30% identity to the known chloroplast triose phosphate/phosphate translocators. The corresponding genes are expressed in both photosynthetically active tissues and in nongreen tissues, although transcripts were more abundant in nongreen tissues. Expression of the coding region in transformed yeast cells and subsequent transport measurements of the purified recombinant translocator showed that the protein mediates transport of inorganic phosphate in exchange with C3 compounds phosphorylated at C-atom 2, particularly phosphoenolpyruvate, which is required inside the plastids for the synthesis of, for example, aromatic amino acids. This plastidic phosphate transporter is thus different in structure and function from the known triose phosphate/phosphate translocator. We propose that plastids contain various phosphate translocators with overlapping substrate specificities to ensure an efficient supply of plastids with a single substrate, even in the presence of other phosphorylated metabolites

Subjektive und objektive Beurteilung des Fahrverhaltens von Pkw

Available from TIB Hannover: RN 4481(139) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Ergaenzende Auswertungen zur subjektiven und objektiven Beurteilung des Fahrverhaltens von Pkw

This project is a sequel to the one presented in No.139 of the FAT 97 series, in which a large number of drivers were asked to make driving tests. In all more than 70 drivers in 6 different variants of passenger cars had been making a total of about 2500 lane changes and 500 tests on secondary roads. Objective data were measured during the tests, and the drivers' subjective impressions were recorded as well. Objective characteristics were then defined and correlated with the subjective impressions. Of all the objective characteristics identified, the following had the biggest effect on the drivers' subjective impressions: (a) Delay between steering wheel angle and yaw velocity; (b) delay between steering wheel angle and transverse velocity; (c) Floating angle; (d) roll velocity. The correlation was most pronounced for professional test drivers. The data presented here provide a host of information on the interdependences between drivers' actions, drivers' sensations, vehicle response, road characteristics and driver characteristics that could not be fully analyzed in the earlier publicationSIGLEAvailable from TIB Hannover: RN 4481(161) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Pflege- und Entwicklungsplan Lange Rhoen. T. 1-2 Schlussbericht

With 24 mapsSIGLETIB Hannover: FR 3026(1.2) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman