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Institution

INESC-ID

NonprofitLisbon, Portugal
About: INESC-ID is a nonprofit organization based out in Lisbon, Portugal. It is known for research contribution in the topics: Field-programmable gate array & Control theory. The organization has 932 authors who have published 2618 publications receiving 37658 citations.


Papers
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Proceedings Article
27 Jul 2011
TL;DR: A novel structured nearest neighbor prediction method which seeks to find the morphological analysis for each unlabeled language which lies as close as possible in the feature space to a training language.
Abstract: In this paper, we consider the problem of unsupervised morphological analysis from a new angle. Past work has endeavored to design unsupervised learning methods which explicitly or implicitly encode inductive biases appropriate to the task at hand. We propose instead to treat morphological analysis as a structured prediction problem, where languages with labeled data serve as training examples for unlabeled languages, without the assumption of parallel data. We define a universal morphological feature space in which every language and its morphological analysis reside. We develop a novel structured nearest neighbor prediction method which seeks to find the morphological analysis for each unlabeled language which lies as close as possible in the feature space to a training language. We apply our model to eight inflecting languages, and induce nominal morphology with substantially higher accuracy than a traditional, MDL-based approach. Our analysis indicates that accuracy continues to improve substantially as the number of training languages increases.

11 citations

01 Jan 2003
TL;DR: This paper aims at exposing the main challenges of a replicated system operating in the particular environment of mobile ad-hoc networks, with the goal of providing general guidelines for an effective solution.
Abstract: The emergence of more powerful and resourceful mobile devices, as well as new wireless communication technologies, is turning the concept of ad-hoc networking into a viable and promising possibility for ubiquitous information sharing. In such context, replication is a key issue in order to achieve acceptable performance and availability levels. However, the inherent characteristics of ad-hoc networks bring up new challenges for which most conventional replication systems don’t provide an appropriate response. Namely, the lack of a preexisting infrastructure, the high topological dynamism of these networks, the relatively low bandwidth of wireless links, as well as the limited storage and energy resources of mobile devices are issues that strongly affect the efficiency of any distributed system intended to provide ubiquitous information sharing. Such aspects demand solutions that are able to offer high availability, in spite of the expected frequent network partitions and device suspension periods. Pessimistic approaches for replication are usually too restrictive solutions to achieve such requirement. On the other hand, optimistic replication strategies offer weak consistency guarantees which may not reflect the expectations of users and applications. This paper aims at exposing the main challenges of a replicated system operating in the particular environment of mobile ad-hoc networks, with the goal of providing general guidelines for an effective solution. Based on a common conceptual model, some key design strategies are described and compared. A survey of some relevant state of the art solutions illustrates such concepts and presents implementations of the main design alternatives. In conclusion, guidelines are proposed towards an effective replication strategy for mobile ad-hoc networks.

11 citations

Proceedings ArticleDOI
13 Jun 2010
TL;DR: This work formalizes a set of correctness and optimality properties ensuring the minimality and completeness of the set of explored serialization orders within the replicated transactional system.
Abstract: We define the problem of speculative processing in a replicated transactional system layered on top of an optimistic atomic broadcast service. A realistic model is considered in which transactions' read and write sets are not a priori known and transactions' data access patterns may vary depending on the observed snapshot. We formalize a set of correctness and optimality properties ensuring the minimality and completeness of the set of explored serialization orders within the replicated transactional system.

11 citations

Journal ArticleDOI
TL;DR: In this paper, empirical data-driven research aims to unveil thought-provoking insights on the U.S. hotel offer across its 50 states by collecting information of more than 30,000 hotels through web scraping.
Abstract: This empirical data-driven research aims to unveil thought-provoking insights on the U.S. hotel offer across its 50 states. Information of more than 30,000 hotels was collected through web scraping...

11 citations

Book ChapterDOI
28 Apr 2009
TL;DR: The current mobile Java capacity for executing computationally demanding algorithms is studied and the real possibility of using smartphones for autonomous navigation is revealed.
Abstract: Embedded systems are considered one of the most potential areas for future innovations. Two embedded fields that will most certainly take a primary role in future innovations are mobile robotics and mobile computing. Mobile robots and smartphones are growing in number and functionalities, becoming a presence in our daily life. In this paper, we study the current feasibility of a smartphone to execute navigation algorithms. As a test case, we use a smartphone to control an autonomous mobile robot. We tested three navigation problems: Mapping, Localization and Path Planning. For each of these problems, an algorithm has been chosen, developed in J2ME, and tested on the field. Results show the current mobile Java capacity for executing computationally demanding algorithms and reveal the real possibility of using smartphones for autonomous navigation.

11 citations


Authors

Showing all 967 results

NameH-indexPapersCitations
João Carvalho126127877017
Jaime G. Carbonell7249631267
Chris Dyer7124032739
Joao P. S. Catalao68103919348
Muhammad Bilal6372014720
Alan W. Black6141319215
João Paulo Teixeira6063619663
Bhiksha Raj5135913064
Joao Marques-Silva482899374
Paulo Flores483217617
Ana Paiva474729626
Miadreza Shafie-khah474508086
Susana Cardoso444007068
Mark J. Bentum422268347
Joaquim Jorge412906366
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202311
202252
202196
2020131
2019133
2018126