320481
Quark: an efficient XQuery full-text implementation
The XQuery 1.0 and XPath 2.0 Full-text (XQFT) language has been developed by the W3C to extend XQuery and XPath with full-text search capabilities. XQFT allows users to specify a mix of structured and complex full-text predicates, and also allows users to score/rank such queries. The power and flexibility of XQFT gives rise to two interesting questions. First, is it possible to efficiently integrate a full-function XML query language with sophisticated full-text search? Second, is it possible to score and rank arbitrary XQuery and XQFT queries? In this demonstration, we present evidence that it is indeed possible to achieve the above goals. We demonstrate the Quark open-source data management system and show how we can seamlessly and efficiently integrate structured and unstructured search over XML data. In particular, we demonstrate (a) techniques for efficiently evaluating keyword search over virtual XML views, and (b) a framework for scoring both structured and full-text predicates.
15362987
User-centric personalized extensibility for data-driven web applications
We describe a novel programming model for building, extending, and personalizing web-based data-driven applications.
6710727
Modification of the Wiener index 4
A novel topological index W(F) is defined by the matrices X, W, and L as W(F) = XWL. Where L is a column vector expressing the characteristic of vertices in the molecule; X is a row vector expressing the bonding characteristics between adjacent atoms; W is a reciprocal distance matrix. The topological index W(F), based on the distance-related matrix of a molecular graph, is used to code the structural environment of each atom type in a molecular graph. The good QSPR/QSAR models have been obtained for the properties such as standard formation enthalpy of inorganic compounds and methyl halides, retention indices of gas chromatography of multiple bond-containing hydrocarbons, aqueous solubility, and octanol/water partition of benzene halides. These models indicate that the idea of using multiple matrices to define the modified Wiener index is valid and successful.
15984592
An Open Framework for Smart and Personalized Distance Learning
Web based learning enables more students to have access to the distance-learning environment and provides students and teachers with unprecedented flexibility and convenience. However, the early experience of using this new learning means in China exposes a few problems. Among others, teachers accustomed to traditional teaching methods often find it difficult to put their courses online and some students, especially the adult students, find themselves overloaded with too much information. In this paper, we present an open framework to solve these two problems. This framework allows students to interact with an automated question answering system to get their answers. It enables teachers to analyze students learning patterns and organize the webbased contents efficiently. The framework is intelligent due to the data mining and case-based reasoning features, and user-friendly because of its personalized services to both teachers and students.
41965041
A degree condition of 2-factors in bipartite graphs
Abstract Let G =( V 1 , V 2 ; E ) be a bipartite graph with | V 1 |=| V 2 |= n , and σ 2 (G)= min {d(u)+d(v) : u,v∈V(G),uv∉E(G)} . In this paper, we show that G has a 2-factor which exactly contains k independent cycles if σ 2 ( G )⩾ n +2 for any 1⩽ k ⩽⌊( n −1)/2⌋, and we also show that the result is sharp.
40840411
A property on convex fuzzy sets
In this note, a new result characterizing fuzzy set convexity is given under lower semicontinuous condition.
7121493
Conventions in human-human multi-threaded dialogues: a preliminary study
In this paper, we explore the conventions that people use in managing multiple dialogue threads. In particular, we focus on where in a thread people interrupt when switching to another thread. We find that some subjects are able to vary where they switch depending on how urgent the interrupting task is. When time-allowed, they switched at the end of a discourse segment, which we hypothesize is less disruptive to the interrupted task when it is later resumed.