HF radar systems are widely and routinely used for the measurement of ocean surface currents and waves. Analysis methods presently in use are based on the assumption of infinite water depth, and may therefore be inadequate close to shore where the radar echo is strongest. In this paper, we treat the situation when the radar echo is returned from ocean waves that interact with the ocean floor. S...

Tagging in social media system has demonstrated to be a convenient way for users to annotate objects of interest.One reason behind its success obviously because tags can be chosen by users arbitrarily without any topic and specificity constraints. Although tags are free-from keywords, there are some evidences 1 suggesting that, for a particular object type, users tend to use “similar” tag sets....

Semantic formalisms such as MRS [Copestake et al., 2003], UDRT [Reyle, 1993], or CLLS [Egg et al., 2001] provide elegant solutions for the treatment of semantic ambiguities in terms of underspecification. These semantic formalisms are not constrained to specific syntactic frameworks. MRS, for example, is mainly used with HPSG grammars, but may also be built from LFG grammars using co-descriptio...

This paper describes work in progress for the creation of a new open– source resource for Spanish: an HPSG–based treebank so–called Tibidabo. The annotation is performed semi–automatically. First, the corpus is automatically annotated by a symbolic HPSG–based grammar for Spanish implemented on the Linguistic Knowledge Builder system; then, the output is manually disambiguated. The existence of ...

In this paper, the shallow and computationally inexpensive approach to syntax suggested by Argamon et al. (1998) is explored, enhanced and applied to ten different genres included in the BNC. Their approach to syntax uses POS trigrams. The rationale behind this choice is that trigrams are large enough to encode useful syntactic information, and small enough to be computationally manageable. The...

An autonomous surface vehicle instrumented with optical and acoustical sensors was deployed in Kane’ohe Bay, HI, U.S.A., to provide high-resolution, in situ observations of coral reef reflectancewithminimal human presence. The data represented awide range in bottom type, water depth, and illumination and supported more thorough investigations of remote sensing methods for identifying and mappin...