A talajsavanyodás által előidézett egyéb talajdegradációs folyamatok és az ezekre vonatkozó indikátorok kidolgozása = Analyses of acidity caused soil degradation processes and their early indicators

A talajsavanyodás stádiuma a talaj egyik fontos tulajdonsága, mely meghatározza a talaj fizikai, kémiai és biológiai tulajdonságait. Célkitűzésem volt a talajsavanyodás által előidézett talajdegradációs folyamatok vizsgálata és indikátorok kidolgozása. A gyorsan és rutinszerűen elvégezhető kémiai alapparaméterek pontos tájékoztatást adtak a talajok savanyodási mértékéről, azonban talajaink pillanatnyi állapotát tárják elénk. Önmagukban nem nyújtanak elegendő információt a talajdegradáció előrehaladottságáról. A talajok sav/bázis puffertitrálásával számszerű információt kaptunk a különböző talajszintek érzékenységéről. A reológia pontosan és számszerűen fejezte ki a vizsgált talajok szerves és ásványi összetevőinek hatását a szerkezetre. A talajok ásványtani összetételének elemzése bonyolult, hosszadalmas és költséges, ennek ellenére nagyon jó módszerként szolgált a különböző ásványi alkotók mennyiségi elkülönítésére a különböző frakciókban. Ezen paramétereket biológiai paraméterekkel kiegészítve még jobban értelmezhető eredményeket adnak. Az ugróvillások és a földigiliszták egyed- és fajszámának változása jól jelezte a degradáció fokozatait, jó biológiai indikátornak bizonyultak, gyorsan, könnyen és olcsón elvégezhetők. Jól ismételhetők és információt adnak a talajban bekövetkező leromlási folyamatokról, ezáltal időben megkezdhetjük a talajdegradáció elleni beavatkozásokat. | The rate of soil acidification is an important soil property, since it determines the physical, chemical and biological properties of soils. My objectives were to examine the acidity caused soil degradation processes and to develop indicators. The routine laboratory methods gave accurate information about the rate of soil acidification, but only the present status of soil acidity. By the potentiometric titrations of soils we gained quantitative information about the sensitivity of the different soil horizons. By rheology measurements, precise and quantitative information was gained about the effects of organic and minerals fractions on soil structure. However, the mineralogical analyses of soils are very complicated, time consuming and expensive, we found it a very good method to differentiate the mineral composition of soils. These parameters together with the biological parameters can give more understandable results regarding the degradation processes. The change of species number and density of Collembola and earthworms indicated the different levels of soil degradations very well. They are very good biological indicators, since it is relatively quick, easy and cheap use. The examination with these biological indicators can be repeated easily and give information about soil degradation processes in an early stage, thus, we can start acting against the different soil degradation processes

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

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