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Automatic Programming of Cellular Automata and Artificial Neural Networks Guided by Philosophy
(2019)arXivMany computer models such as cellular automata have been developed and successfully applied. However, in some cases these models might be restrictive on the possible solutions or their solution is difficult to interpret. To overcome this problem, we outline an approach, the so-called allagmatic method, that automatically creates and programs models with as little limitations as possible but still maintaining human interpretability. We ...Working Paper -
Integrated management of Swiss cropland is not sufficient to preserve its soil carbon pool in the long-term
(2018)Biogeosciences DiscussionsCroplands are involved in the exchange of carbon dioxide (CO2) between the atmosphere and the biosphere. Furthermore, soil carbon (C) stocks play an important role in soil fertility. It is thus of great interest to know whether intensively managed croplands act as a net source or sink of atmospheric CO2 and if soil C stocks are preserved over long timescales. The FluxNet site CH-Oe2 in Oensingen, Switzerland, has been operational since ...Working Paper -
Investigating Climate Change and Reproduction: Experimental Tools from Evolutionary Biology
(2012)Working Paper -
The Manin-Drinfeld theorem and the rationality of Rademacher symbols
(2020)arXivFor any noncocompact Fuchsian group Γ, we show that periods of the canonical differential of the third kind associated to residue divisors of cusps are expressed in terms of Rademacher symbols for Γ - generalizations of periods appearing in the classical theory of modular forms. This result provides a relation between Rademacher symbols and the famous theorem of Manin and Drinfeld. On this basis, we present a straightforward group-theoretic ...Working Paper -
Resolving brain organoid heterogeneity by mapping single cell genomic data to a spatial reference
(2020)bioRxivSelf-organizing tissues resembling brain regions grown in vitro from human stem cells (so-called organoids or spheroids) offer exciting possibilities to study human brain development, disease, and evolution. Brain organoids or spheroids are complex and can contain cells at various stages of differentiation from different brain structures. Single-cell genomic methods provide powerful approaches to explore cell composition, differentiation ...Working Paper -
Different processes shape prokaryotic and picoeukaryotic assemblages in the sunlit ocean microbiome
(2018)bioRxivThe smallest members of the sunlit-ocean microbiome (prokaryotes and picoeukaryotes) participate in a plethora of ecosystem functions with planetary-scale effects. Understanding the processes determining the spatial turnover of this assemblage can help us better comprehend the links between microbiome species composition and ecosystem function. Ecological theory predicts that selection, dispersal and drift are main drivers of species ...Working Paper -
Gland Segmentation in Colon Histology Images: The GlaS Challenge Contest
(2016)arXivColorectal adenocarcinoma originating in intestinal glandular structures is the most common form of colon cancer. In clinical practice, the morphology of intestinal glands, including architectural appearance and glandular formation, is used by pathologists to inform prognosis and plan the treatment of individual patients. However, achieving good inter-observer as well as intra-observer reproducibility of cancer grading is still a major ...Working Paper -
ARNOLD HARTLEY GIBSON: Hydraulics professor and textbook author
(2022)The United Kingdom was the leading nation in the 19th century, then the British Empire. Despite this fact, hydraulic engineering was not a main concern. Scientists rather worked in maritime hydraulics and naval architecture. In all the above three topics, textbooks were not really available, because both engineers and scientists rather published their works in scientific journals. Gibson, an indirect successor of Osborne Reynolds at the ...Working Paper -
Factors controlling coccolithophore biogeography in the Southern Ocean
(2018)Biogeosciences DiscussionsThe biogeography of Southern Ocean phytoplankton controls not only the local biogeochemistry, but also the export of macronutrients to lower latitudes and depth. Of particular relevance is the interaction between coccolithophores and diatoms, with the former being prevalent along the "Great Calcite Belt" (40–60°S), while diatoms tend to dominate the regions south of 60°S. To address the factors controlling coccolithophore distribution and ...Working Paper -
The full greenhouse gases budget of Africa: Synthesis, uncertainties and vulnerabilities
(2013)Biogeosciences DiscussionsThis paper, developed under the framework of the RECCAP initiative, aims at providingimproved estimates of the carbon and GHG (CO2, CH4and N2O) balance of continentalAfrica. The various components and processes of the African carbon and GHG bud-get were considered, and new and available data derived by different methodologies (based on inventories, ecosystem fluxes, models, and atmospheric inversions) wereintegrated. The related uncertainties ...Working Paper