235 research outputs found
EU Policies and Cluster Development of Hydrogen Communities
This study takes on the issue of political and socio-economic conditions for the hydrogen economy as part of a future low carbon society in Europe. It is subdivided into two parts. A first part reviews the current EU policy framework in view of its impact on hydrogen and fuel cell development. In the second part an analysis of the regional dynamics and possible hydrogen and fuel cell clusters is carried out. The current EU policy framework does not hinder hydrogen development. Yet it does not constitute a strong push factor either. EU energy policies have the strongest impact on hydrogen and fuel cell development even though their potential is still underexploited. Regulatory policies have a weak but positive impact on hydrogen. EU spending policies show some inconsistencies. Regions with a high activity level in HFC also are generally innovative regions. Moreover, the article points out certain industrial clusters that favours some regions' conditions for taking part in the HFC development. However, existing hydrogen infrastructure seems to play a minor role for region's engagement. An overall well-functioning regional innovation system is important in the formative phase of an HFC innovation system, but that further research is needed before qualified policy implications can be drawn. Looking ahead the current policy framework at EU level does not set clear long term signals and lacks incentives that are strong enough to facilitate high investment in and deployment of sustainable energy technologies. The likely overall effect thus seems to be too weak to enable the EU hydrogen and fuel cell deployment strategy. According to our analysis an enhanced EU policy framework pushing for sustainability in general and the development of hydrogen and fuel cells in particular requires the following: 1) A strong EU energy policy with credible long term targets; 2) better coordination of EU policies: Europe needs a common understanding of key taxation concepts (green taxation, internalisation of externalities) and a common approach for the market introduction of new energy technologies; 3) an EU cluster policy as an attempt to better coordinate and support of European regions in their efforts to further develop HFC and to set up the respective infrastructure.hydrogen, energy policy, clusters, regions, innovation
Skogshistorisk utvikling etter hogst og kĂžlbrenning Nord-Ăsterdalen og potensialet for framtidig skogproduksjon
Skogtilstanden i hĂžyereliggende arealer i Nord-Ăsterdalen som ble overutnyttet i ved gruvedrift frem til ca. 1900 viser fortsatt stort innslag av fjellbjĂžrk og glisne furuskoger med et stĂ„ende volum varierende rundt 3-6 m3 per dekar. Den dĂ„rlige gjenveksten av furu i omrĂ„det kan trolig delvis forklares ut fra endret lokalklima etter rovhogstene, mangel pĂ„ frĂž, vedvarende hardt beitetrykk og lokal forurensning fra smeltehyttene. I omrĂ„der som ble klassifisert som skogreisingsarealer (70.000 daa) er det utfĂžrt ulike kulturtiltak som viser at disse arealene har et langt stĂžrre produksjonspotensiale. En tidobling av stĂ„ende volum vil vĂŠre mulig med aktiv kultursatsing og treslagsskifte om formĂ„let er stĂžrst mulig produksjon og karbonbinding. Vrifuru kan vĂŠre et bra alternativ pĂ„ mange lokaliteter. Vektlegges restaurering av den tidligere furuskogen vil det naturlige treslagsvalget vĂŠre stedegen furu. Per i dag er det begrenset tilgang pĂ„ frĂž og plantemateriale fra hĂžydelag 7, men mulighetene for naturlig foryngelse bĂžr klarlegges. De siste tiĂ„rene med gunstigere temperatur har trolig medfĂžrt Ăžkt andel modent frĂž i hĂžyereliggende furuskog. Langtidsvirkninger av kĂžlbrenning pĂ„ bonitet og nĂŠringstilgang er tema i en masteroppgave knyttet til prosjektet og vil utgjĂžre endelig rapportering nĂ„r oppgaven foreligger i 2024.Skogshistorisk utvikling etter hogst og kĂžlbrenning Nord-Ăsterdalen og potensialet for framtidig skogproduksjonpublishedVersio
EU Policies and Cluster Developments of Hydrogen Communities. Bruges European Economic Research (BEER) Papers 14/December 2008
This study takes on the issue of political and socio-economic conditions for the hydrogen
economy as part of a future low carbon society in Europe. It is subdivided into two parts. A
first part reviews the current EU policy framework in view of its impact on hydrogen and fuel
cell development. In the second part an analysis of the regional dynamics and possible
hydrogen and fuel cell clusters is carried out.
The current EU policy framework does not hinder hydrogen development. Yet it does not
constitute a strong push factor either. EU energy policies have the strongest impact on
hydrogen and fuel cell development even though their potential is still underexploited.
Regulatory policies have a weak but positive impact on hydrogen. EU spending policies show
some inconsistencies.
Regions with a high activity level in HFC also are generally innovative regions. Moreover,
the article points out certain industrial clusters that favours some regions' conditions for
taking part in the HFC development. However, existing hydrogen infrastructure seems to play
a minor role for region's engagement. An overall well-functioning regional innovation system
is important in the formative phase of an HFC innovation system, but that further research is
needed before qualified policy implications can be drawn.
Looking ahead the current policy framework at EU level does not set clear long term signals
and lacks incentives that are strong enough to facilitate high investment in and deployment of
sustainable energy technologies. The likely overall effect thus seems to be too weak to enable
the EU hydrogen and fuel cell deployment strategy. According to our analysis an enhanced
EU policy framework pushing for sustainability in general and the development of hydrogen
and fuel cells in particular requires the following: 1) A strong EU energy policy with credible
long term targets; 2) better coordination of EU policies: Europe needs a common
understanding of key taxation concepts (green taxation, internalisation of externalities) and a
common approach for the market introduction of new energy technologies; 3) an EU cluster
policy as an attempt to better coordinate and support of European regions in their efforts to
further develop HFC and to set up the respective infrastructure
Long-term spatiotemporal dynamics in a mountain birch (Betula pubescens ssp. czerepanovii) forest in south-east Norway
Mountain birch forest covers large areas in Eurasia, and their ecological resilience provides important ecosystem services to human societies. This study describes long-term stand dynamics based on permanent plots in the upper mountain birch belt in SE Norway. We also present forest line changes over a period of 70âyears. Inventories were conducted in 1931, 1953, and 2007. Overall, there were small changes from 1931 up to 1953 followed by a marked increase in biomass and dominant height of mountain birch throughout the period from 1953 to 2007. In addition, the biomass of spruce (Picea abies) and the number of plots with spruce present doubled. The high mortality rate of larger birch stems and large recruitment by sprouting since the 1960s reveal recurrent rejuvenation events after the earlier outbreak of the autumnal moth (Epirrita autumnata). Our results demonstrate both a high stem turnover in mountain birch and a great ability to recover after disturbances. This trend is interpreted as regrowth after a moth attack, but also long-term and time-lagged responses due to slightly improved growth conditions. An advance of the mountain birch forest line by 0.71âmâyearâ1 from 1937 to 2007 was documented, resulting in a total reduction of the alpine area by 12%. Most of the changes in the forest line seem to have taken place after 1960. Regarding silviculture methods in mountain birch, a dimension cutting of larger birch trees with a cutting interval of c. 60âyears seems to be a sustainable alternative for mimicking natural processes.publishedVersio
Feasibility of wind power integration in weak grids in non-coastal areas of Sub-Saharan Africa: the case of Mali
Installed wind capacity in Africa has grown rapidly the last few years, and by late 2016 had reached about 4.8 GW. However, so far few investments have been made in inland localities due to the generally lower wind potential. This paper therefore explores if and to what extent it is possible to establish economically feasible wind-power plants in countries with lower wind potential. To address this question, the paper provides a combined wind resource mapping and a pre-feasibility study for grid integration of wind power at four specific sites in Mali. The study finds that Mali has generally poor wind conditions, with average wind speeds of below 5 m/s at 50 m above ground level in the south, while there are larger areas in the northern part with average wind speeds of above 7 m/s at 50 m above ground level. Overall the research shows that in countries with generally poor wind conditions, such as in the southern part of Mali, it is possible to identify a limited number of sites with local speed-up effects situated close to the existing grid, at which there are options for undertaking medium-size wind-power projects that would be economically feasible at current crude oil prices of 50 USD/barrel
Ypsilon er alfa og omega
Anmeldelse: John Schou, Jeppe Skott, Kristine Jess ogHans Christian Hansen:Matematik for lĂŠrerstuderende â Ypsilon,Epsilon, Omega og Delta
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