READ @your library Francois Melese & Anke Richter (poster)

A project of the Dudley Knox Library at the Naval Postgraduate School

Data compilation and evaluation for U(IV) and U(VI) for the Thermodynamic Reference Database THEREDA

THEREDA (Thermodynamic Reference Database) is a collaborative project, which has been addressed this challenge. The partners are Helmholtz-Zentrum Dresden-Rossendorf, Karlsruhe Institute of Technology (KIT-INE), Gesellschaft für Anlagen- und Reaktorsicherheit Braunschweig mbH (GRS), TU Bergakademie Freiberg (TUBAF) and AF-Consult Switzerland AG (Baden, Switzerland). The aim of the project is the establishment of a consistent and quality assured database for all safety relevant elements, temperature and pressure ranges, with its focus on saline systems. This implied the use of the Pitzer approach to compute activity coefficients suitable for such conditions. Data access is possible via commonly available internet browsers under the address http://www.thereda.de. One part of the project - the data collection and evaluation for uranium – was a task of the Helmholtz-Zentrum Dresden-Rossendorf. The aquatic chemistry and thermodynamics of U(VI) and U(IV) is of great importance for geochemical modelling in repository-relevant systems. The OECD/NEA Thermochemical Database (NEA TDB) compilation is the major source for thermodynamic data of the aqueous and solid uranium species, even though this data selection does not utilize the Pitzer model for the ionic strength effect correction. As a result of the very stringent quality demands, the NEA TDB is rather restrictive and therefore incomplete for extensive modelling calculations of real systems. Therefore, the THEREDA compilation includes additional thermodynamic data of solid secondary phases formed in the waste material, the backfill and the host rock, though falling into quality assessment (QA) categories of lower accuracy. The data review process prefers log K values from solubility experiments (if available) to those calculated from thermochemical data

Zahnflächenspezifische Arealbeimpfung handelsüblicher Chair-side-Tests zum Nachweis von Mutans-Streptokokken und Laktobazillen

In der vorliegenden Arbeit wurde der zahnflächenspezifische Keimnachweis von Mutans-Streptokokken und Laktobazillen auf den handelsüblichen Kultursystemen Dentocult® SM und LB (Orion Diagnostica, Espoo Finnland) und CRT® bacteria (Ivoclar Vivadent GmbH, Schaan, Liechtenstein) untersucht. Dazu erfolgte zunächst eine In-vitro-Untersuchung mit Referenzstämmen, den o. g. Kultursystemen, ihren adäquaten Kulturmedien und verschiedenen Impfmethoden. Im Anschluss daran wurde das Pinselverfahren in einer klinischen Pilotstudie erprobt. Untersucht wurde die Plaque aus den Okklusalflächen der Sechs-Jahr-Molaren von Kindern im Alter von 6-7 Jahren. Die Kultursysteme erwiesen sich als sehr gut für den flächenspezifischen Keimnachweis geeignet

Beyond Paper and Plastic: A Meta-Model for Credential Use and Governance

ID cards, public transport tickets, and diplomas are examples of credentials that society has established as a means to provide trustworthy information to others. In the digital world, the emergence of self-sovereign identity as a new paradigm for the management of digital credentials aims to narrow the conceptual gap between digital and physical credentials. The ongoing digital transformation in the public sector requires dealing with a large variety of credentials in different forms systematically. However, there is still currently no generic conceptual model of credentials in the Information Systems (IS) discipline. We employ design science research to develop a unified meta-model on credentials, their use, and their governance. Our results contribute to research through an empirically grounded conceptualization of credentials and provide practitioners with a common basis to capture, analyze, and design the handling of credentials in real-world scenarios

Denn wir wissen nicht, was sie tun... Portfolios zur Dokumentation von Kompetenzen in einem weiterbildenden Masterstudiengang

Im vorliegenden Beitrag wird am Beispiel eines internetgestützten, weiterbildenden Studiengangs gezeigt, wie die Portfoliomethode als kompetenzbasierte Prüfungsleistung in ein Blended Learning Design integriert werden kann. Im Rahmen einer qualitativen Analyse von Projektportfolios wird untersucht, wie Studierende über ihren Kompetenzentwicklungsprozess reflektieren und welche Kompetenzen auf diese Weise dokumentiert werden

Annual Report 2010 - Institute of Radiochemistry

At the beginning of 2011, the former Forschungszentrum Dresden-Rossendorf (FZD) was fully integrated into the Helmholtz Association, as Helmholtz-Zentrum Dresden-Rossendorf (HZDR). Therefore, the present Annual Report 2010 of the Institute of Radiochemistry (IRC) is published as the first HZDR-Report. The Institute of Radiochemistry is one of the six Research Institutes of this centre. IRC contributes to the research program “Nuclear Safety Research” in the “Research Field of Energy” and performs basic and applied research in radiochemistry and radioecology. Motivation and background of our research are environmental processes relevant for the installation of nuclear waste repositories, for remediation of uranium mining and milling sites, and for radioactive contaminations caused by nuclear accidents and fallout. Because of their high radiotoxicity and long half-life the actinides are of special interest

The Impact of Inclusion Criteria in Health Economic Assessments

The article of record as published may be found at https://doi.org/10.2165/11590150-000000000-00000This study aims to present complex network models which analyze professional swimmers of 50-m freestyle Olympic competitions, comparing characteristics and variables that are considered performance determinants. This comparative research includes Olympic medalists’ versus non-medalists’ behavior. Using data from 40 athletes with a mean age, weight and height of 26 ± 2.9 years, 87 ± 5.59 kg, 193 ± 3.85 cm, respectively, at the Olympics of 2000, 2004, 2008, 2012, and 2016 (16-year interval), we built two types of complex networks (graphs) for each edition, using mathematical correlations, metrics and the spectral decomposition analysis. It is possible to show that complex metrics behave differently between medalists and non-medalists. The spectral radius (SR) proved to be an important form of evaluation since in all 5 editions it was higher among medalists (SR results: 3.75, 3.5, 3.39, 2.91, and 3.66) compared to non- medalists (2.18, 2.51, 2.23, 2.07, and 2.04), with significantly differences between. This study introduces a remarkable tool in the evaluation of the performance of groups of swimming athletes by complex networks, and is relevant to athletes, coaches, and even amateurs, regarding how individual variables relate to competition results and are reflected in the SR for the best performance. In addition, this is a general method and may, in the future, be developed in the analysis of other competitive sports