Most of the common proposals for temporal extensions of SQL (e.g., ATSQL2 or SQL/Tem-poral) use explicit interval-based references to time (interval attributes). In this paper we propose a diierent approach: we use point-based references to time as a basis for a temporal extension of SQL. The proposed language|SQL/TP|extends the syntax and semantics of SQL/92 in a very natural way: by adding a ...

ISO/IEC 9126 is currently one of the most widespread quality standards. In its actual form it embraces both quality models and metrics. Due to its generic nature, some of the concepts presented therein need to be refined before using the standard in a real project. In our paper, we aim at exploring which are the concepts that require being more elaborated before putting the standard to work. Sp...

The challenges in Recommender System (RS) mainly involve cold start and sparsity problems. The essence behind these problems is that the extant techniques normally mainly rely on the user-item rating matrix, which sometimes is not informative enough for predicting recommendations. To solve these challenges, many existing papers considered user/item attributes as complementary information with a...

One of the differences between relational and object-oriented databases (OODB) is that attributes in OODB can of a collection type (e.g. sets, lists, arrays, bags) as well as a simple type (e.g. integer, string). Consequently, explicit join queries in OODB may be based on collection attributes. One form of collection join queries in OODB is collectionintersect join queries, where the joins are ...

̊ The paper investigates the meaning variation of the German movement verb steigen (‘climb’/‘rise’). Three major uses are contrasted within a frame-based analysis: steigen as a verb of manner of motion, as a verb of directed movement and as an intensional verb. The modeling in terms of Barsalou frames, i. e., in terms of functional attributes and their values, allows an explicit account of the c...

The problem of determining whether a receiver may safely accept attributes (e.g., identity, credentials, location) of unknown senders in various online social protocols is a special instance of a more general problem of establishing trust in interactive protocols. We introduce the notion of interactive trust protocols to illustrate the usefulness of social collateral in reducing the inherent tr...

Although Construct validity theory (CVT) did not formally enter the scene until psychology was into its eighth decade as an established independent discipline, it might be argued that the history of test-related validity as an area of scholarship is as old as the discipline itself. That is to say, the story of the history of disciplinary psychology is in many ways a story about psychological me...

MOTIVATION Evolutionary comparison leads to efficient functional characterisation of hypothetical proteins. Here, our goal is to map specific sequence patterns to putative functional classes. The evolutionary signal stands out most clearly in a maximally diverse set of homologues. This diversity, however, leads to a number of technical difficulties. The targeted patterns-as gleaned from structu...

In object-oriented systems, a single class consists of attributes and methods and its cohesion denotes the degree of relatedness among these elements. To quantify the cohesiveness of a class, a large number of measures that only depict method–attribute reference relationships have been proposed in last decade. However, the flow-dependence relationships among attributes, the direction of method–...