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In the paper some combinatorial problems motivated by comma-free codes are considered. We describe these problems, give the most significant known results and methods used, present some new results and formulate open problems.

In many frameworks for reasoning under inconsistency, it is implicitly assumed that the formulae from the belief base are connected using a weak form of conjunction. When it is consistent, a belief base B = {φ1, . . . , φn}, where the φi are propositional formulae, is logically equivalent to the base {φ1 ∧ . . . ∧ φn}. However, when it is not consistent, both bases typically lead to different c...

Scenarios have been already used for designing and evaluating ontology-based tools. For example, the so-called “motivating scenarios” are a core component of the TOVE ontological engineering method elaborated by Grüninger and Fox (1995; Uschold and Grüninger, 1996). We ourselves used a “scenario approach” for designing and evaluating CoMMA, a corporate memory computer platform based on ontologi...

A consecutive series of 22 stable adult inpatients with sickle cell anaemia were examined for the presence and severity of spontaneous 'comma' signs of the conjunctiva. Fifteen patients had severe conjunctival signs (more than 10 commas in the worse eye). The presence of severe conjunctival signs was associated with a broader distribution of intraerythrocytic haemoglobin concentrations (p = 0.0...

An epithelial cell line, designated COMMA-1D, was derived from mammary tissue of BALB/c mice in the middle of pregnancy. This line, in continuous cell culture for 12 months, exhibits several characteristics distinctive of normal mammary epithelial cells, including induction of casein synthesis in vitro and normal duct morphogenesis in the cleared mammary fat pads of syngeneic mice. The cells al...

AminoTrack is a web based tool designed to increase the efficiency with which sequence data is recorded for further analysis. The main purpose of AminoTrack is to streamline the process and reduce human error in the identification of mutations present in multiple sequences compared to a reference sequence. Aligned protein sequences are entered in the web submission form and comma delimited file...