Knowledge Search within a Company-WIKI

The usage of Wikis for the purpose of knowledge management within a business company is only of value if the stored information can be found easily. The fundamental characteristic of a Wiki, its easy and informal usage, results in large amounts of steadily changing, unstructured documents. The widely used full-text search often provides search results of insufficient accuracy. In this paper, we will present an approach likely to improve search quality, through the use of Semantic Web, Text Mining, and Case Based Reasoning (CBR) technologies. Search results are more precise and complete because, in contrast to full-text search, the proposed knowledge-based search operates on the semantic layer

Orbifold completion of 3-categories

We develop a general theory of 3-dimensional ``orbifold completion'', to describe (generalised) orbifolds of topological quantum field theories as well as all their defects. Given a semistrict 3-category $\mathcal{T}$ with adjoints for all 1- and 2-morphisms (more precisely, a Gray category with duals), we construct the 3-category $\mathcal{T}_{\textrm{orb}}$ as a Morita category of certain $E_1$-algebras in $\mathcal{T}$ which encode triangulation invariance. We prove that in $\mathcal{T}_{\textrm{orb}}$ again all 1- and 2-morphisms have adjoints, that it contains $\mathcal{T}$ as a full subcategory, and we argue that it satisfies a universal property which implies $(\mathcal{T}_{\textrm{orb}})_{\textrm{orb}} \cong \mathcal{T}_{\textrm{orb}}$. This is a categorification of the work in [CR]. Orbifold completion by design allows us to lift the orbifold construction from closed TQFT to the much richer world of defect TQFTs. We illustrate this by constructing a universal 3-dimensional state sum model with all defects from first principles, and we explain how recent work on defects between Witt equivalent Reshetikhin--Turaev theories naturally appears as a special case of orbifold completion.Comment: 58 pages, many diagrams and figure

Grayanotoxin I Intoxication in Pet Pigs

Contaminated honey is a common cause of grayanotoxin intoxication in humans. Intoxication of animals, especially cattle, is usually due to ingestion of plants of the Ericaceae family, such as Rhododendron. Here, we report the ingestion of Pieris japonica as the cause of grayanotoxin I intoxication in 2 miniature pigs that were kept as pets. The pigs showed sudden onset of pale oral mucosa, tachycardia, tachypnea, hypersalivation, tremor, and ataxia that progressed to lateral recumbency. The pathological examination of one pig revealed no specific indications for intoxication except for the finding of plant material of Pieris japonica in the intestine. Grayanotoxin I was identified in the ingested plant, gastric content, blood, liver, bile, kidney, urine, lung, and skeletal muscle via HPLC-MS/MS. Grayanotoxin I should be considered as a differential etiological diagnosis in pigs with unspecific signs and discovery of ingested plant material as the only indication in the pathologic examination

Detection of a conformational change in Gγ upon binding Gβ in living cells

AbstractInteraction induced changes in the conformation of proteins are frequently the molecular basis for the modulation of their activities. Although proteins perform their functions in cells, surrounded by many potential interaction partners, the studies of their conformational changes have been mainly restricted to in vitro studies. Ste4p (Gβ) and Ste18p (Gγ) are the subunits of a heterotrimeric G-protein in the yeast Saccharomyces cerevisiae. A split-ubiquitin based conformational sensor was used to detect a major structural rearrangement in Ste18p upon binding to Ste4p. Based on these in vivo results and the solved structure of the mammalian Gβγ, we propose that Gγ of yeast adopts an equally extended structure, which is only induced upon association with Gβ

Das Pilotprojekt „Kugelschuss auf der Weide“ in der Schweiz

Das System der sogenannten Weideschlachtung/Kugelschuss auf der Weide ist bis dato einmalig in der Schweiz. In Deutschland wird die stressvermeidende Weideschlachtung schon auf mehreren Betrieben durchgeführt. Die Schlachtrinder werden nicht mehr dem Stress bedeutenden Verlust der vertrauten Umgebung ausgesetzt und können ohne Lebendtiertransport und den damit verbundenen Stressfaktoren auf dem heimischen Betrieb betäubt und getötet werden. Nach dem Entbluten wird der Schlachtkörper dann in einem eigens dafür angefertigten PKW-Anhänger, der sämtliche hygienetechnischen Anforderungen erfüllt, in ein nahegelegenes Schlachtlokal verbracht und dort fachgerecht und im konventionellen Sinne weiterverarbeitet. Damit das System der Weideschlachtung einwandfrei funktioniert, die zu schlachtenden Tiere korrekt betäubt und anschließend getötet werden und sämtliche Punkte hinsichtlich Tierschutz, Arbeitssicherheit und Hygiene eingehalten werden können, gilt es Richtlinien einzuhalten. Diese, sowie die einzelnen Schritte einer einwandfreien Weideschlachtung werden in diesem Artikel dargestellt

The invariants of the Weil representation of SL2(Z)\mathrm{SL}_2(\mathbb{Z})

The transformation behaviour of the vector valued theta function of a positive definite even lattice under the metaplectic group $\mathrm{Mp}_2(\mathbb{Z})$ is described by the Weil representation. This representation plays an important role in the theory of automorphic forms. We show that its invariants are induced from $5$ fundamental invariants

A Proof of Kirchhoff's First Law for Hyperbolic Conservation Laws on Networks

Networks are essential models in many applications such as information technology, chemistry, power systems, transportation, neuroscience, and social sciences. In light of such broad applicability, a general theory of dynamical systems on networks may capture shared concepts, and provide a setting for deriving abstract properties. To this end, we develop a calculus for networks modeled as abstract metric spaces and derive an analog of Kirchhoff's first law for hyperbolic conservation laws. In dynamical systems on networks, Kirchhoff's first law connects the study of abstract global objects, and that of a computationally-beneficial edgewise-Euclidean perspective by stating its equivalence. In particular, our results show that hyperbolic conservation laws on networks can be stated without explicit Kirchhoff-type boundary conditions.Comment: 20 pages, 6 figure

The Non-Autonomous Chiral Model and the Ernst Equation of General Relativity in the Bidifferential Calculus Framework

The non-autonomous chiral model equation for an $m \times m$ matrix function on a two-dimensional space appears in particular in general relativity, where for $m=2$ a certain reduction of it determines stationary, axially symmetric solutions of Einstein's vacuum equations, and for $m=3$ solutions of the Einstein-Maxwell equations. Using a very simple and general result of the bidifferential calculus approach to integrable partial differential and difference equations, we generate a large class of exact solutions of this chiral model. The solutions are parametrized by a set of matrices, the size of which can be arbitrarily large. The matrices are subject to a Sylvester equation that has to be solved and generically admits a unique solution. By imposing the aforementioned reductions on the matrix data, we recover the Ernst potentials of multi-Kerr-NUT and multi-Demianski-Newman metrics