Search

The present study identifies, describes and assesses in detail opportunities and threats for the Circular Economy arising from E-commerce. A broad literature research and direct stakeholder input led to the identification of 18 opportunities and 23 threats for the Circular Economy, allocated to 7 different clusters. Most of the identified threats refer to “Logistics and transport”, while opportunities refer mainly to the topics “Accessibility of information” and “Digitalisation”. By means of a comparative assessment in the current situation and future optimistic and pessimistic potential developments, the direct and indirect effects of the opportunities and threats have been evaluated, with specific focus on 7 selected product categories. In total, 11 opportunities and 16 threats have been assessed as either medium or highly relevant. The assessment revealed that most of the threats classified as highly relevant belong to the cluster “Logistics and transport”, including induced parcel transport, parcel return and inefficient transport, while most of the highly relevant opportunities are to be found in the cluster “Accessibility of information”, as in the case of second-hand commerce or product portfolio., JRC.B.5-Circular Economy and Industrial Leadership

Digitalization has been reshaping the media landscape in recent years, often conveying an implicit promise of becoming less dependent on physical resources. At the same time, the current understanding of digital reading goes beyond dedicated e-readers or definable digital media products such as magazines or newspapers. In fact, it must be perceived as a function or service obtained from existing and ever-expanding “digital ecosystems”. There is furthermore a clear and unambiguous trend that relatively small and mobile devices are on the rise for consuming all kinds of media. Next to potentially enabling environmental gains compared to traditional paper-based media consumption, there are agreeing indications of a shift from overall electricity consumption dominated by end-user devices towards an increasing importance of less tangible data transmission networks and data centers. Therefore, a bottom-up analysis is deemed to compliment more general top-down observations and assessments. To this end, an elaborated reference scenario is proposed as to bridge the mere analytical method of Life Cycle Assessment (LCA) with behavioral aspects based on German market observations and surveys. The prevailing aim of this study is to detect environmental hot-spots and absolute impacts linked to the service of accessing text-based content via connected electronic devices. In doing so, this study takes the position that both types of media consumption – digital and paper-based - are incommensurable due to the very evident differences in provided functions, markets, and industries. Therefore, an attributional and stand-alone LCA is considered appropriate. The perceived current situation (reference scenario) evolves around substantiated estimates and assumptions concerning production of devices, use of devices as well as operation of essential data transmission network components. Looking at potential hot-spots, electricity consumption linked to data transmission could be a decisive factor for the environmental performance of digital reading. However, the actual importance of data transmission infrastructures depends on both methodological choices and a range of parameters or trends. For instance, the relative importance is shifted when more recent estimates of electricity intensities are incorporated. Depending on actual and localized electricity intensity of data transmission, the amount of data required to provide an expected function may inhibit environmental potentials of digital media consumption. Postulating average annual consumption of digital contents and assuming actual substitution of equivalent printed media products, about 50 kg CO2-equivalents. could potentially be avoided. This theoretical potential is based on the calculated global warming potential (GWP) associated with digital reading according to the reference scenario which amounts to about 29 kg CO2-equivalents. Therefore, this study supports findings from previous studies that indicated environmental benefits of digital reading. Compared to other functions or services (e.g. video/music streaming, podcasts, audio books) embedded in the same “digital ecosystems”, reading requires little amount of data. If allocation of upstream effects is based on time, the relative importance of data transmission networks could be gauged and compared by adopting a “data-to-service time” ratio. Taking the reference scenario as a starting point, a perceivable ratio for digital reading is 0.015 GB/h, including systemic inefficiencies. In contrast, streaming of high-definition video contents can easily consume 3 GB/h, a 200-fold increase. The audience of this study comprises providers of digital reading services and/or other media services as well as end-users as integral element in “digital ecosystems”. Besides, the report proposes a conceptual assessment framework which can be applied to other contemporary digital services or functions. De senaste åren har digitalisering omformat medielandskapet, med ett implicit löfte om att minska beroendet av fysiska resurser. Dessutom finns det tydliga trender som pekar mot en ökad användning av små, mobila enheter för att konsumera alla sorters media. En uppdaterad bottom-up analys bedöms komplettera mer generella observationer och bedömningar. Om man antar årliga genomsnittliga konsumtionsmönster i Tyskland, så är tillverkningen av elektroniska slutanvändarenheter – oavsett om de är till för enskilda ändamål (e-läsare) eller om de är multifunktionella (smartphone, surfplatta) – onekligen en miljömässigt kritisk punkt för digitalt läsande. Elförbrukningen, som sker i samband med dataöverföringen, kan också vara en avgörande faktor för den övergripande miljöpåverkan av digital läsning. Dock beror den faktiska påverkan av dataöverförningsinfrastrukturer dels på metodologiska val men även på ett antal andra parametrar och trender. Genom att undersöka indikatorn för global uppvärmning kan denna studie konstatera att resultaten stödjer tidigare forskning, som redan pekar på de miljömässiga vinsterna av digitalt läsande. Målgruppen för denna studie innefattar både distributörer av digitala läs-tjänster och/eller andra media tjänster såväl som slutanvändare som ett integrerat element i ”digitala ekosystem”.

Joachim Aigner Graz, Univ., Masterarb., 2009

Im Rahmen dieser Arbeit wird ein in vitro-Untersuchungskonzept zur Untersuchung von oberflächenmodifizierten TiAl6V4-Implantaten vorgestellt. Dazu werden verschiedene Zellkulturmodelle entwickelt und hinsichtlich ihrer Aussagekraft auf die Entzündungsinitialisierung untersucht. Zur Erfassung der Entzündungsantwort wird ein umfangreiches Repertoire an biologischen Parametern untersucht. Es wird des Weiteren ein neuer Ansatz zur Ermittlung der Oberflächenkompatibilität vorgestellt, der auf der Annahme beruht, dass bestimmte Rauheitsdimensionen der Implantatoberflächen die Zellreaktion beeinflussen. Diese oberflächenanalytischen Ergebnisse werden vor- und in vitro-Versuchen gegenübergestellt. Das Prüfmodell wird sowohl an unbeschichteten als auch protein- und hydroxylapatitbeschichteten Proben erfolgreich angewandt und erweitert damit gängige in vitro-Biokompatibilitätstests. An in vitro concept for the examination of surface-modified implants from TiAl6V4 titanium alloy was introduced within the scope of this dissertation. In this connection, various human cell culture models were developed and examined with regard to their significance for inflammation initialisation. Finding of the inflammation response requires the examination of an extensive repertoire of biological parameters. In addition, a new attempt for determination of the surface compatibility is presented, which is based on the assumption that certain roughness dimensions of the implant surfaces affect the cell reaction. These surface-analytical results are compared in advance and in vitro examinations. The test model is successfully used both on uncoated and protein and hydroxylapatite-coated samples and, therefore, extends established in vitro biocompatibility investigations.