The ratio of nitrogen isotopes in the Martian atmosphere is a key constraint on planet's atmospheric evolution. However, enrichment heavy isotope expected due to loss from sputtering and photochemical processes greater than measurements. A massive, multi-bar early CO2-dominated recent volcanic outgassing have been proposed explain this discrepancy, many previous models assumed rapidly reached s...

Mutational, phylogenetic, and structural modeling approaches were combined to develop a general method to study leucine-rich repeat (LRR) domains and were used to identify residues within the Arabidopsis thaliana FLAGELLIN-SENSING2 (FLS2) LRR that contribute to flagellin perception. FLS2 is a transmembrane receptor kinase that binds bacterial flagellin or a flagellin-based flg22 peptide through...

We present a fast and scalable online method for tuning statistical machine translation models with large feature sets. The standard tuning algorithm—MERT—only scales to tens of features. Recent discriminative algorithms that accommodate sparse features have produced smaller than expected translation quality gains in large systems. Our method, which is based on stochastic gradient descent with ...

in German – deutsche Zusammenfassung 91

In this paper we investigate the use of rich morphology such as word segmentation, part-of-speech tagging and diacritic restoration to improve Arabic language modeling. We enrich the context by performing morphological analysis on the word history. We use neural network models to integrate this additional information, due to their ability to handle long and enriched dependencies. We experimente...

Crawling “classical” web applications is a problem that has been addressed more than a decode ago. Efficient crawling of web applications that use advanced technologies such as AJAX (called Rich Internet Applications, RIAs) is still an open problem. Crawling is important not only for indexing content, but also for building models of the applications, which is necessary for automated testing, au...

Strategies for “crawling” Web sites efficiently have been described more than a decade ago. Since then, Web applications have come a long way both in terms of adoption to provide information and services and in terms of technologies to develop them. With the emergence of richer and more advanced technologies such as AJAX, “Rich Internet Applications” (RIAs) have become more interactive, more re...

The Semantic Web [2] is a vision in which today’s Web will be extended with machine readable content, and where every resource will be marked-up using machine readable metadata. The intention is that documents on the Semantic Web will convey real meaning by using structured data-formats and by referring to common ontologies. In our research we wish to explore the impact such a Semantic Web woul...