Spark plasma sintered carbon electrodes for electrical double layer capacitor applications

The spark plasma sintering (SPS) is an emerging process for shaping any type of materials (metals, ceramic, polymers and their composites). The advantage of such a process is to prepare densified ceramic materials in a very short time, while keeping the materials internal porosity. In the present work, we have used the SPS technique to prepare activated carbon-based electrodes for Electrochemical Double Layer Capacitor applications (EDLC). Self-supported 600 and 300µm-thick electrodes were prepared and characterized using of Electrochemical Impedance Spectroscopy and galvanostatic cycling in a non-aqueous 1.5MNEt4BF4 in acetonitrile electrolyte. Electrochemical performance of these sintered electrodes were found to be in the same range – or even slightly better – than the conventional tape-casted activated carbon electrodes. Although organic liquid electrolyte was used to characterize the electrochemical performance of the sintered electrodes, these results demonstrate that the SPS technique could be worth of interest in the ultimate goal of designing solid-state supercapacitors

The teaser - a multifunctional text-type

Die Arbeit untersucht die für den Online-Journalismus typischen, kurzen Ankündungstexte auf den Startseiten ausgewählter, deutschen Online-Zeitungen. Außerdem wird die Ankündigung als mediales Prinzip untersucht, der Teaser in seinen Funktionen beschrieben. Schließlich wird ein Korpus von Teasern unter syntaktischen und stilistischen Aspekten untersucht. Im Ergebnis wird die Textsorte als ausgereift und variantenreich bewertet. Die verschiedenen Textfunktionen wie Orientierung, Information, Lesemotivation werden sprach- stilistisch gezielt unterstützt: lexikalisch z.B durch Eigennamen oder Augenblickskomposita. Syntaktisch konnten interessante Einzelphänomene wie die Steigerung der Satz-Rhythmik durch Ellipsen oder die Ausgliederung von Satzteilen beobachtet werden.This work examines the short typical text-type in Online-Journalism: the teaser. It is found especially on the homepages of online newspapers. The author looks for announcing as a media principle and describes the Teaser in his basic functions. Finally a collection of teasers is evaluated under syntactic and stylistic aspects. In the result the text-type turned out rich in variations. Different text functions like orientation, information, reading motivation are supported straight: e.g. lexical by proper names. Looking on the syntactic structure interesting single phenomena could be observed like the increase of the rhythm of a sentence by ellipses

Tracing sources and fate of zinc in a mining-impacted river catchment: insights from flow measurements, synoptic sampling, and zinc isotopes

This paper reports on the comprehensive monitoring of the Rookhope Burn catchment in the Weardale valley, northern Pennines (Uk), which has been subject to lead, zinc, and fluorspar mining for over two centuries. Zinc is the major contaminant in surface waters, exceeding the Environmental Quality standard value for salmonid fish. synoptic flow monitoring and water sampling have been carried out, including both inflow and instream sampling points along the Rookhope Burn, with the purpose of tracing both point and diffuse sources of Zn throughout the catchment. The Zn load profile suggests an important role for Zn-rich groundwater contributions to the stream bed and has also established the existence of Zn sinks. Evidence from hyporheic zone sampling suggests Zn reaction or surface complexation with Mn oxide surfaces forming on stream bed sediments as a potential mechanism responsible for the observed metal attenuation. Current work is focused on testing the potential of Zn isotopes to fingerprint sources and pathways of Zn in the aquatic system. Preliminary results show significant variation in the stream water Zn isotopic signature from the headwaters to the base of the catchment

Exploring practical approaches to maximising data quality in electronic healthcare records in the primary care setting and associated benefits

Exploiting the information contained within electronic healthcare records (EHR) data will be key to addressing major challenges to public health both nationally and globally, ultimately offering a means of maximising efficiency and equality in care. There are, however, significant challenges in using EHRs effectively and particularly in ensuring the quality of data recorded. Incorrect or missing data could render records as useless or indeed misleading such that conclusions drawn from the data could have a negative impact. Amongst other difficulties, recording data can be time consuming to the extent of conflicting with the GP’s primary focus of patient consultation in an already time-constrained environment. Understanding the requirements of and the demands upon GPs must be central to addressing the issue of data quality (DQ) within EHRs. As part of on-going work into DQ at the Clinical Practice Research Datalink (CPRD) and in collaboration with the University of Sussex (UoS), a workshop session was held at the SAPC (Society for Academic Primary Care) conference in 2014 with the aim of exploring issues of DQ in primary care EHRs from the perspective of different users of GP data and with particular focus on how and why data is recorded in the first instance. The intended outcome was a furthered understanding of both the challenges and the direct benefits to GPs of ensuring high quality data with a view to establishing a workable approach to recording data and maximising benefits to all users of EHRs

In Defense of Institutionalization: A Rape Crisis Center as a Case Study

The prevailing wisdom of both the social science literature and of social movement activists postulates that the institutionalization of social movements is a conservatizing tendency. The iron law of oligarchy, Robert Michels\u27 concept, is invoked as the rule of thumb for social movement transformation. From my participant observation study of STOP, an urban rape crisis center, I have drawn different conclusions. In that case study, it appears that institutionalization undermines oligarchy and conservatism, rather than contributing to them. Employing Oberschall\u27s resource mobilization theory of social movement development, I suggest that institutionalization fosters social change efforts at STOP by ensuring organizational stability and resource availability. Second, I propose that institutionalization enables STOP to resist co-optation by providing its participants with material, symbolic, and emotional rewards for organizational loyalty. Finally, I conclude that at STOP institutionalization has inhibited the formation of informal elites, or what Jo Freeman has termed the tyranny of structurelessness

The relationship between educational pathways and occupational outcomes at the intersection of gender and social origin

In this article, we are interested in the differences in the educational pathways and subsequent labour market outcomes by social origin and gender. We apply sequence analyses to model the educational trajectories and conduct regression analyses to determine how the individual's own social status and the salary at labour market entry differs. First, our results show that educational pathways vary by parental status and gender when controlling for reading and mathematics/science skills. Men and pupils with a lower socioeconomic background are overrepresented in vocational education, whereas women and pupils with a more privileged socioeconomic background more often pursue general and academic tracks. Second, these different trajectories lead to unequal occupational status and income. Besides these indirect effects, significant direct effects of parental status and gender on the individual's own occupational status and salary can be found. Together, these findings provide a broad overview of the emergence of inequalities by gender and social origin over the early life course, ranging from differences in skills learned in school to labour market outcomes

Strategic Preferences of Farm Supply and Grain Elevator Businesses: Empirical Evidence from Germany

Against the background of profound structural changes of the agricultural sector during the last decades, the current paper examines an often neglected area in agricultural economics, namely the local farm supply and grain elevator (FSG) business. By using a discrete choice experiment, we examine strategic preferences of agricultural traders in Germany. For this purpose, we employ a Hierarchical Bayes Model and simulate shares of preferences for different strategic options. Since our study also reveals strategic subgroups, the paper at hand helps on the one hand to better understand the ongoing structural changes within this industry and on the other hand to forecast the manner of competition between the farmers’ market intermediaries in the future

Critical alignment in inquiry-based practice in developing mathematics teaching

This paper reports a case study from a mathematics teaching developmental research project. The theoretical foundation for the research comprises communities of inquiry and critical alignment, with which the developmental methodology has a particular synergy. This synergy is the main focus of the paper. The paper elaborates theoretical and methodological antecedents of the project and traces these through a case study of developments in the practices of one upper secondary school team and a group of university didacticians (mathematics teacher educators and researchers) during the first year of the project. The case study reveals that critical alignment and inquiry (necessarily) bring uncertainty and risk, and foster tensions within the teachers’ practice and between the practices of teachers and didacticians. In exposing these uncertainties, risks and tensions, the paper points to their value for the learning and knowledge gained by participants