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The replacement of fossil fuels by renewable fuels such as biogas and biohydrogen will require efficient and economically competitive process technologies together with new kinds of biomass. A two-stage system for biogas production has several advantages over the widely used one-stage continuous stirred tank reactor (CSTR). However, it has not yet been widely implemented on a large scale. Biohydro

The years 1988-1998 were named by World Council of Churches as The Ecumenical Decade - Churches in Solidarity with Women. On a worldwide scale, the Decade challenged member churches to portray Solidarity with Women in their contexts. Churches around the world launched a variety of projects and programs for this purpose. The Decade envisaged a new fellowship of women and men in church and society,

In our article entitled ‘The Responsibility to Protect – An incoherent Doctrine?’ we claimed that R2P in the version proposed by the ICISS is incoherent. We argued that the ICISS-report used the criteria of right intention, proportionality and legitimate authority to determine when a humanitarian intervention is obligatory and we continued by arguing that this cannot be done in a coherent manner.

Ice covers ten percent of the earth’s surface, seven percent of its oceans and is currently dominating the visual landscape as a key theme of climate communication in the media. Focusing on representations of climate change that implement ice as a key motif, this thesis postulates why and how climate discourse shapes, and is shaped by, the technological, social and institutional production of imag

The origin of "cosmic" fluorine is uncertain, but there are three proposed production sites/mechanisms for the origin: asymptotic giant branch (AGB) stars, nu nucleosynthesis in Type II supernovae, and/or the winds of Wolf-Rayet stars. The relative importance of these production sites has not been established even for the solar neighborhood, leading to uncertainties in stellar evolution models of

I am not convinced that the challenge for self-adaptive software is how to handle unexpected changes. I believe that the real challenge is how to characterise the uncertainty that the self-adaptive software has to handle. Once a proper characterisation of the uncertainty is in place, I think handling unanticipated changes and situations becomes a lot simpler. What is difficult is to know what rang

https://www.mhm.lu.se/sites/mhm.lu.se/files/2021-02/obl%20geh%C3%B6rspiano_Kantor%202021.pdf - 2026-07-25

We show that the two problems of computing the permanent of an n*n matrix of poly(n)-bit integers and counting the number of Hamiltonian cycles in a directed n-vertex multigraph with exp(poly(n)) edges can be reduced to relatively few smaller instances of themselves. In effect we derive the first deterministic algorithms for these two problems that run in o(2^n) time in the worst case. Classic pol