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At present, there are no quantitative, objective methods for diagnosing the Parkinson disease. Existing methods of quantitative analysis by myograms suffer by inaccuracy and patient strain; electronic tablet analysis is limited to the visible drawing, not including the writing forces and hand movements. In our paper we show how handwriting analysis can be obtained by a new electronic pen and new features of the recorded signals. This gives good results for diagnostics. Keywords: Parkinson diagnosis, electronic pen, automatic handwriting analysis
Elliptic flow analysis at RHIC with the Lee-Yang Zeroes method in a relativistic transport approach
(2006)
The Lee-Yang zeroes method is applied to study elliptic flow (v_2) in Au+Au collisions at sqrt s =200 A GeV, with the UrQMD model. In this transport approach, the true event plane is known and both the nonflow effects and event-by-event v_2 fluctuations exist. Although the low resolutions prohibit the application of the method for most central and peripheral collisions, the integral and differential elliptic flow from the Lee-Yang zeroes method agrees with the exact v_2 values very well for semi-central collisions.
We propose to measure correlations of heavy-flavor hadrons to address the status of thermalization at the partonic stage of light quarks and gluons in high-energy nuclear collisions, shown on the example of azimuthal correlations of D-Dbar pairs. We show that hadronic interactions at the late stage can not disturb these correlations significantly. Thus, a decrease or the complete absence of these initial correlations indicates frequent interactions of heavy-flavor quarks in the partonic stage. Therefore, early thermalization of light quarks is likely to be reached. PACS numbers: 25.75.-q
Von der welt louff vnd gestallt (3b) [Anm. 1] - vom Lauf der Welt und ihrem Zustand - handelt ein Werk, das im Zentrum der nachfolgenden Überlegungen stehen soll: die Reimchronik zum Schwaben- bzw. Schweizerkrieg des Hans Lenz vom Jahr 1499. In Form eines fiktiven Gesprächs, einer disputatz (62b) zwischen dem Autor und einem Waldbruder, werden die historische Zeitgeschichte und die damalige politisch-gesellschaftliche Situation gesichtet, geordnet, diskutiert, gedeutet und in größere, insbesondere heilsgeschichtliche Zusammenhänge gebracht. Text und Kontext stehen in diesem Beispiel (wie in der Historiographie ganz allgemein) in besonders offensichtlicher Beziehung zueinander - es leuchtet unmittelbar ein, daß ein solcher Text ohne den geschichtlichen Hintergrund nicht angemessen beurteilt werden kann. Dabei darf allerdings nicht allein danach gefragt werden, wie der Historiograph mit den geschichtlichen Fakten (soweit diese überhaupt objektiv rekonstruiert werden können!) umgeht, es muß auch dem Umfeld des Verfassers selbst und seiner Rezipienten sowie dem Zweck und der Funktion seiner Dichtung Rechnung getragen werden, den literarischen und außerliterarischen Einflüssen und Vorbildern, den Denk- und Argumentationsmustern, kurz: die "Lebenswelt" [Anm. 2] des Textes sollte zu seinem Verständnis im gesellschaftlich-kulturellen Kontext soweit als möglich erschlossen werden.
Der Workshop "Nationale Spezifika und internationale Aspekte in der Wissenschaftsentwicklung – unter besonderer Berücksichtigung der Narratologie" soll, so die Organisatoren in ihrer Einladung – "Gelegenheit bieten, Bedingungen und Möglichkeiten integrativer Ansätze zur Untersuchung von Wissenschaftsprozessen zu diskutieren und wichtige Faktoren der Wissenschaftsentwicklung zu benennen und kritisch zu beleuchten." Die Produktion, Distribution und Rezeption von Wissenssystemen vollziehe sich, schreiben die Organisatoren, "in unterschiedlichen nationalen und internationalen sozialen Räumen, die sowohl die Form als auch den kognitiven Gehalt von Theorien mitunter stark mitstrukturieren, ihre Durchsetzung begünstigen oder behindern. Das wird besonders deutlich, wenn man Transferprozesse von Theorien verfolgt." Den Begriff des Wissenstransfers, der hier in Anschlag gebracht wird, möchte ich in meinem Beitrag einer terminologischen Klärung zuführen. Dazu möchte ich zunächst einige terminologische Überlegungen über den Status der Teilbegriffe anstellen, aus denen der Begriff zusammengesetzt ist (I.), dann die Verwendung des Begriffs in verschiedenen disziplinären Kontexten beobachten (II.) und schließlich einen Vorschlag für eine differenzierte Verwendung des Begriffs als Analysekategorie der Wissenschaftsentwicklung machen (III).
In the past, a divide could be seen between ’deep’ parsers on the one hand, which construct a semantic representation out of their input, but usually have significant coverage problems, and more robust parsers on the other hand, which are usually based on a (statistical) model derived from a treebank and have larger coverage, but leave the problem of semantic interpretation to the user. More recently, approaches have emerged that combine the robustness of datadriven (statistical) models with more detailed linguistic interpretation such that the output could be used for deeper semantic analysis. Cahill et al. (2002) use a PCFG-based parsing model in combination with a set of principles and heuristics to derive functional (f-)structures of Lexical-Functional Grammar (LFG). They show that the derived functional structures have a better quality than those generated by a parser based on a state-of-the-art hand-crafted LFG grammar. Advocates of Dependency Grammar usually point out that dependencies already are a semantically meaningful representation (cf. Menzel, 2003). However, parsers based on dependency grammar normally create underspecified representations with respect to certain phenomena such as coordination, apposition and control structures. In these areas they are too "shallow" to be directly used for semantic interpretation. In this paper, we adopt a similar approach to Cahill et al. (2002) using a dependency-based analysis to derive functional structure, and demonstrate the feasibility of this approach using German data. A major focus of our discussion is on the treatment of coordination and other potentially underspecified structures of the dependency data input. F-structure is one of the two core levels of syntactic representation in LFG (Bresnan, 2001). Independently of surface order, it encodes abstract syntactic functions that constitute predicate argument structure and other dependency relations such as subject, predicate, adjunct, but also further semantic information such as the semantic type of an adjunct (e.g. directional). Normally f-structure is captured as a recursive attribute value matrix, which is isomorphic to a directed graph representation. Figure 5 depicts an example target f-structure. As mentioned earlier, these deeper-level dependency relations can be used to construct logical forms as in the approaches of van Genabith and Crouch (1996), who construct underspecified discourse representations (UDRSs), and Spreyer and Frank (2005), who have robust minimal recursion semantics (RMRS) as their target representation. We therefore think that f-structures are a suitable target representation for automatic syntactic analysis in a larger pipeline of mapping text to interpretation. In this paper, we report on the conversion from dependency structures to fstructure. Firstly, we evaluate the f-structure conversion in isolation, starting from hand-corrected dependencies based on the TüBa-D/Z treebank and Versley (2005)´s conversion. Secondly, we start from tokenized text to evaluate the combined process of automatic parsing (using Foth and Menzel (2006)´s parser) and f-structure conversion. As a test set, we randomly selected 100 sentences from TüBa-D/Z which we annotated using a scheme very close to that of the TiGer Dependency Bank (Forst et al., 2004). In the next section, we sketch dependency analysis, the underlying theory of our input representations, and introduce four different representations of coordination. We also describe Weighted Constraint Dependency Grammar (WCDG), the dependency parsing formalism that we use in our experiments. Section 3 characterises the conversion of dependencies to f-structures. Our evaluation is presented in section 4, and finally, section 5 summarises our results and gives an overview of problems remaining to be solved.
In this paper, we investigate the usefulness of a wide range of features for their usefulness in the resolution of nominal coreference, both as hard constraints (i.e. completely removing elements from the list of possible candidates) as well as soft constraints (where a cumulation of violations of soft constraints will make it less likely that a candidate is chosen as the antecedent). We present a state of the art system based on such constraints and weights estimated with a maximum entropy model, using lexical information to resolve cases of coreferent bridging.
Using a qualitative analysis of disagreements from a referentially annotated newspaper corpus, we show that, in coreference annotation, vague referents are prone to greater disagreement. We show how potentially problematic cases can be dealt with in a way that is practical even for larger-scale annotation, considering a real-world example from newspaper text.
We obtain the D-meson spectral density at finite temperature for the conditions of density and temperature expected at FAIR. We perform a self-consistent coupled-channel calculation taking, as a bare interaction, a separable potential model. The Lambda_c (2593) resonance is generated dynamically. We observe that the D-meson spectral density develops a sizeable width while the quasiparticle peak stays close to the free position. The consequences for the D-meson production at FAIR are discussed.
We have calculated the D-meson spectral density at finite temperature within a self-consistent coupled-channel approach that generates dynamically the Lambda_c (2593) resonance. We find a small mass shift for the D-meson in this hot and dense medium while the spectral density develops a sizeable width. The reduced attraction felt by the D-meson in hot and dense matter together with the large width observed have important consequences for the D-meson production in the future CBM experiment at FAIR.