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In this article, we present a language-independent, unsupervised approach to sentence boundary detection. It is based on the assumption that a large number of ambiguities in the determination of sentence boundaries can be eliminated once abbreviations have been identified. Instead of relying on orthographic clues, the proposed system is able to detect(More)
We determine the productivity of determin-erless PPs in German quantitatively, restricting ourselves to the preposition unter. The study is based on two German newspaper corpora, comprising some 210 million words. The problematic construction, i.e. unter followed by a determinerless singular noun occurs some 16.000 times in the corpus. To clarify the(More)
Cholinesterases are a large family of enzymatic proteins widely distributed throughout both neuronal and non-neuronal tissues. In Alzheimer's disease (AD), analytical as well as epidemiological studies suggest an implication of an abnormal focal accumulation of aluminum in the brain. In this devastating disease, aluminum may interfere with various(More)
Chronic fatigue syndrome is defined by the Atlanta Centers for Disease Control (Atlanta, GA, USA) as debilitating fatigue lasting for longer than 6 months. Symptoms include disturbances of cognition. Certain factors have in the past been shown to influence cognition, including metals such as aluminum, iron, and zinc; and steroids such as(More)
Single sodium channel currents were studied in mouse neuroblastoma cells. Channel conductance (gamma) was 11.6 +/- 3.4 pS at 6-8 degrees C. Unitary current amplitudes and channel activity increased with increasing temperature. The Arrhenius plot of the conductance was linear between 5 and 35 degrees C with an activation enthalpy of 27.1 kJ/mole (Q10 =(More)
We describe a language-independent, flexible , and accurate method for the detection of abbreviations in text corpora. It is based on the idea that an abbreviation can be viewed as a collocation, and can be identified by using methods for collocation detection such as the log likelihood ratio. Although the log likelihood ratio is known to show a good recall(More)
Traditional approaches to prepositions classify preposition lexemes into different semantic classes like spatial, temporal or modal ones. In this paper we reconsider the so-called spatial prepositions and their subclassification. We propose a sense based classification of prepositions using traditional criteria to determine different classes of(More)
The aim of this study was to show the presence, distribution and function of the pituitary adenylate cyclase activating polypeptide (PACAP) and its receptors in the CNS and peripheral nervous system of the mollusk, Helix pomatia. PACAP-like and pituitary adenylate cyclase activating polypeptide receptor (PAC1-R)-like immunoreactivity was abundant both in(More)