5 research outputs found
POLIS: a probabilistic summarisation logic for structured documents
No full textPhDAs the availability of structured documents, formatted in markup languages such as SGML, RDF,
or XML, increases, retrieval systems increasingly focus on the retrieval of document-elements,
rather than entire documents. Additionally, abstraction layers in the form of formalised retrieval
logics have allowed developers to include search facilities into numerous applications, without
the need of having detailed knowledge of retrieval models.
Although automatic document summarisation has been recognised as a useful tool for reducing
the workload of information system users, very few such abstraction layers have been developed
for the task of automatic document summarisation. This thesis describes the development
of an abstraction logic for summarisation, called POLIS, which provides users (such as developers
or knowledge engineers) with a high-level access to summarisation facilities. Furthermore,
POLIS allows users to exploit the hierarchical information provided by structured documents.
The development of POLIS is carried out in a step-by-step way. We start by defining a series
of probabilistic summarisation models, which provide weights to document-elements at a user
selected level. These summarisation models are those accessible through POLIS. The formal
definition of POLIS is performed in three steps. We start by providing a syntax for POLIS,
through which users/knowledge engineers interact with the logic. This is followed by a definition
of the logics semantics. Finally, we provide details of an implementation of POLIS.
The final chapters of this dissertation are concerned with the evaluation of POLIS, which is
conducted in two stages. Firstly, we evaluate the performance of the summarisation models by
applying POLIS to two test collections, the DUC AQUAINT corpus, and the INEX IEEE corpus.
This is followed by application scenarios for POLIS, in which we discuss how POLIS can be used in specific IR tasks
Radermachia integra Thunb.
No full text93. Radermachia integra Thunb., Kongl. Vetensk. Acad. Handl. 37: 254. 1776. ≡ Artocarpus integra (Thunb.) Merr., Interpr. Herb. Amboin.: 190. 1917. Lectotypus (designated by CORNER, 1939: 70): INDONESIA. Java: Thunbe rg s.n. (U P S -T H U N B 21664 [parts a and b] image seen; isolecto-: G-PREL [G00818144]!, L-908.185-852!, L-908.185-883!). Notes. – The genus Radermachia Thunb. published by THUNBERG (1776: 251) is now accepted under the name Artocarpus J.R. Forst. & G. Forst. Radermachia was published with no type species designated and the lectotype is designated here by Veldkamp: Radermachia incisa Thunb. (≡ Artocarpus altilis (Parkinson) Fosberg). Original material of Radermachia incisa is in Houttuyn’s Java herbarium in G-PREL [G00818146]. Two duplicates of R. integra are present in L in the Java herbarium (L-908.185-852 and L-908.185-883). The first one is annotated by Thunberg as “ Radermachia integra Thunb. ” Both are labelled as isotypes by Jarrett (I.1956) and identified as Artocarpus integra. A duplicate is also present in Houttuyn’s Java herbarium in G-PREL.Published as part of Wijnands, Dirk Onno, Heniger, Johannes, Veldkamp, Jan Frederik, Fumeaux, Nicolas & Callmander, Martin W., 2017, The botanical legacy of Martinus Houttuyn (1720 - 1798) in Geneva, pp. 155-198 in Candollea 72 (1) on page 187, DOI: 10.15553/c2017v721a11, http://zenodo.org/record/572188
Schutz von lagerndem Rundholz - Verfahren, Wirksamkeit von Schutzmaßnahmen und Qualitätseinbußen
No full textDer Schutz des Holzes wird unter Umständen bereits im Wald notwendig. Vor dem Hintergrund des Auftretens großer Mengen von Kalamitätsholz stand die europäische Forst- und Holzwirtschaft in den vergangenen Jahren nicht zum ersten Mal vor der Aufgabe, Rundholz ohne nennenswerte Qualitätsverluste solange zu lagern, bis Kapazitäten für die Ernte, den Transport oder die Weiterverarbeitung frei wurden, was mitunter Jahre in Anspruch nahm. Der vorliegende Beitrag gibt eine Übersicht der heute etablierten Lagerungsverfahren sowie neuerer Verfahren, die sich noch in der Entwicklungs- bzw. Probephase befinden. Ergebnisse aus unlängst abgeschlossenen und laufenden Forschungsprojekten zu Folien-, Erd-, Trocken- und Stehendlagerung werden vorgestellt und die unterschiedlichen Verfahren vor dem Hintergrund der aktuellen Rahmenbedingungen bewertet
