Segmentation of femurs in Anterior-Posterior x-ray images is very important for fracture detection, computer-aided surgery and surgical planning. Existing methods do not perform well in segmenting bones in x-ray images due to the presence of large amount of spurious edges. This paper presents an atlas-based approach for automatic segmentation of femurs in x-ray images. A robust global alignment...

This paper describes two algorithms for networks of quantitative temporal constraints. The rst one is an incremental algorithm for checking the consistency of a set of constraints: it is based on the directional path consistency property, and it is a complete algorithm. The second algorithm relies on a property of shortest paths in a directional path consistent network. We prove this property a...

We investigate the computational complexity of reasoning over temporal extensions of conceptual data models. The temporal conceptual models we analyse include the standard UML/EER ISA between entities and relationships, disjointness and covering, cardinality constraints and their refinements, multiplicity and key constraints; in the temporal dimension, we have timestamping, evolution and transi...

Previously proposed qualitative probabilities do not satisfy the requirements of temporal reasoning, and a new abstraction is proposed here that represents probability changes over time using four values: increasing, decreasing, constant, and unknown. The qualitative temporal probability presented satisfies the axioms of probability by obeying a set of probabilistic constraints. Temporal constr...

This paper gives a formalization of the various modeling constructs that support the design of temporal DBMS. We conduct a deep investigation on evolution constraints, eventually devising a model-theoretic semantics for a full-fledged model with both timestamping and evolution constraints. Furthermore, we also show how to express temporal constraints using a subset of first-order temporal logic...

This paper presents an approach for the representation and handling of soft temporal constraints in a planning framework. It is achieved in two steps. The first one is the representation of soft temporal constraints by means of fuzzy subsets of a real timeline. And the second one is the successful integration of the temporal reasoning capabilities of a scheduler able to handle these constraints...

The study assessed the impact of spatial and temporal constraints on handwriting movements in young children. One hundred children of 5e7 years of age of both genders were given the task of copying isolated cursive letters under four conditions: normal, with temporal, spatial, or spatio-temporal constraints. The results showed that imposing spatio-temporal constraints on handwriting movements a...

In scientific workflow systems, temporal consistency is critical to ensure the timely completion of workflow instances. To monitor and guarantee the correctness of temporal consistency, temporal constraints are often set and then verified. However, most current work adopts user specified temporal constraints without considering system performance, and hence may result in frequent temporal viola...

149 WORDS] Metaphor theory proposes that our understanding of high-level concepts arises through metaphorical construction and extension. One class of metaphors that has been studied extensively within metaphor theory is TIME IS SPACE. The cross-cultural existence of this metaphor has traditionally been interpreted as being a result of our common embodied experiences in the world. In addition t...

In this paper we propose a propositional temporal language based on fuzzy temporal constraints which turns out to be expressive enough for domains –like many coming from medicine– where knowledge is of propositional nature and an explicit handling of time, imprecision and uncertainty are required. The language is provided with a natural possibilistic semantics to account for the uncertainty iss...