Sökning: "bottom-up model"

Visar resultat 1 - 5 av 102 avhandlingar innehållade orden bottom-up model.

1. 1. World oil supply in the 21st century : A bottom-up perspective

   Författare :Henrik Wachtmeister; Mikael Höök; Jamie Speirs; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oil supply; oil production; oil prices; bottom-up; projections; conventional oil; tight oil; shale oil; Natural Resources and Sustainable Development; Naturresurser och hållbar utveckling;

   Sammanfattning : Oil-fuelled progress was a defining feature of the 20th century, and still today, oil remains the world’s largest primary energy source. Yet, oil is a non-renewable and carbon-intensive resource, either depletion or resulting carbon emissions will ultimately limit its use. LÄS MER

3. 2. World oil supply and unconventional resources : Bottom-up perspectives on tight oil production

   Författare :Henrik Wachtmeister; Mikael Höök; Roger Bentley; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; oil supply; oil production; unconventional resources; tight oil; shale oil; bottom-up model; projections; Natural Resources and Sustainable Development; Naturresurser och hållbar utveckling;

   Sammanfattning : Oil is the world’s largest primary energy source. It dominates the transportation sector which underpins the world economy. Yet, oil is a nonrenewable resource, destined not to last forever. In the mid-2000s global conventional oil production stagnated, leading to rising oil prices and fears of permanent oil scarcity. LÄS MER

4. 3. Bottom-up and top-down regulation of heterogeneous lake food webs

   Författare :Fernando Chaguaceda; Peter Eklöv; Kristin Scharnweber; Lars Tranvik; Blake Matthews; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; food webs; resource coupling; ontogenetic diet shifts; resource specialization; bottom-up; top-down; browning; eutrophication; lake; mesocosms; fatty acids; apparent competition; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

   Sammanfattning : Food webs are networks of organisms linked by trophic interactions that regulate the responses of ecosystems to environmental change. Such regulation is a result of the effects of resources on the abundance of their consumers (i.e. bottom-up effects) and/or the influence of consumers on the abundance of their resources (i. LÄS MER

5. 4. Petroleum Production and Exploration : Approaching the End of Cheap Oil with Bottom-Up Modeling

   Författare :Kristofer Jakobsson; Kjell Aleklett; Roger Bezdek; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The theme of this thesis is the depletion of petroleum (crude oil and natural gas). Are there reasons to be concerned about an ‘end of cheap oil’ in the near future? There is a lively debate regarding this issue. The debate is sometimes described as a clash of ‘concerned’ natural scientists and ‘unconcerned’ economists. LÄS MER

7. 5. Investments, system dynamics, energy management and policy : a solution to the metric problem of bottom-up supply curves

   Författare :Fabian Levihn; Cali Nuur; Henrik Blomgen; Filip Johnsson; KTH; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Investments; Energy Management; Policy; MACC; CSC climate change abatement; energy efficiency and conservation; system dynamics; Industriell ekonomi och organisation; Industrial Engineering and Management;

   Sammanfattning : Today, issues such as climate change and increased competition for scarce resources puts pressure on society and firms to transform. Change is not easily managed though, especially not when relating to production or consumption of energy carriers such as district heating or electric power. LÄS MER