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Revisiting microbe-metabolite interactions: doing better than random
(2019)bioRxivRecently, Quinn and Erb et al [1] made the case that when used correctly, correlation and proportionality can outperform MMvec when identifying microbe-metabolite interactions. We revisit this comparison and show that the proposed correlation and proportionality are outperformed by MMvec on real data due to their inability to deal with sparsity commonly observed in microbiome and metabolome datasets.Working Paper -
Meta Answering for Machine Reading
(2019)arXivWe investigate a framework for machine reading, inspired by real world information-seeking problems, where a meta question answering system interacts with a black box environment. The environment encapsulates a competitive machine reader based on BERT, providing candidate answers to questions, and possibly some context. To validate the realism of our formulation, we ask humans to play the role of a meta-answerer. With just a small snippet ...Working Paper -
Ohne Windenergie keine Energiewende
(2019)IASS Discussion PaperWir zeigen, wie die vorgeschlagene 1000 m-Abstandsregelung zwischen Windkraftanlagen und Wohngebäude den Ausbau der Windkraft an Land in Deutschland praktisch stoppen würde. Wir zeigen auch, dass ein Abstand von 600 m gleichzeitig den Schutz der Anwohner und der Ausbau der Windkraft möglich machen kann.Working Paper -
Equilibrium particulate exposure
(2019)IGC Working PaperWe assemble global spatially disaggregated panel data describing ambient particulate levels and transport, population, and economic and polluting activities. These data indicate the importance of country level determinants of pollution, of the equilibrium process that separates or brings together people and particulates, of urbanization, and of the composition of economic activity and energy production. We then develop an Integrated ...Working Paper -
Strong structural controllability of signed networks
(2019)arXivIn this paper, we discuss the controllability of a family of linear time-invariant (LTI) networks defined on a signed graph. In this direction, we introduce the notion of positive and negative signed zero forcing sets for the controllability analysis of positive and negative eigenvalues of system matrices with the same sign pattern. A sufficient combinatorial condition that ensures the strong structural controllability of signed networks ...Working Paper -
A Tight Degree 4 Sum-of-Squares Lower Bound for the Sherrington-Kirkpatrick Hamiltonian
(2019)arXivWorking Paper -
Development and testing of scenarios for implementing Holocene LULC in Earth System Model Experiments
(2019)Geoscientific Model Development DiscussionsAnthropogenic changes in land use and land cover (LULC) during the pre-industrial Holocene could have affected regional and global climate. Current LULC scenarios are based on relatively simple assumptions and highly uncertain estimates of population changes through time. Archaeological and palaeoenvironmental reconstructions have the potential to refine these assumptions and estimates. The Past Global Changes (PAGES) LandCover6k initiative ...Working Paper -
Cohesive self-organization of mobile microrobotic swarms
(2019)arXivMobile microrobots are envisioned to be useful in a wide range of high-impact applications, many of which requiring cohesive group formation to maintain self-bounded swarms in the absence of confining boundaries. Cohesive group formation relies on a balance between attractive and repulsive interactions between agents. We found that a balance of magnetic dipolar attraction and multipolar repulsion between self-assembled particle chain ...Working Paper -
Managing shutdown risk in merchant commodity and energy production
(2019)SSRNMerchant commodity and energy production assets operate in markets with volatile prices and exchange rates. Producers can choose in each period between production, production suspension, and permanent shutdown. Plant closures, however, adversely affect societal entities beyond the specific plant being shutdown such as the parent company and the local community. Motivated by an aluminum producer, we study if mitigating these hard-to-assess ...Working Paper