Now showing items 699-718 of 918

    • Sampling Approach Matters: Active Learning for Robotic Language Acquisition 

      Pillai, Nisha; Raff, Edward; Ferraro, Francis; Matuszek, Cynthia
      Ordering the selection of training data using active learning can lead to improvements in learning efficiently from smaller corpora. We present an exploration of active learning approaches applied to three grounded language ...
    • SAT-based Compressive Sensing 

      Halem, Milton; Finin, Tim (2019-03-06)
      We propose to reduce the original well-posed problem of compressive sensing to weighted-MAX-SAT. Compressive sensing is a novel randomized data acquisition approach that linearly samples sparse or compressible signals at ...
    • SAT: an SVM-based Automated Trust Management System for Mobile Ad-hoc Networks 

      Li, Wenjia; Joshi, Anupam; Finin, Tim (IEEE, 2011-11-01)
      Mobile Ad-hoc Networks (MANETs) are extremely vulnerable to a variety of misbehaviors because of their basic features, including lack of communication infrastructure, short transmission range, and dynamic network topology. ...
    • Satellite data fusion of multiple observed XCO2 using compressive sensing 

      Nguyen, Phuong; Shivadekar, Samit; Chukkapalli, Sai Sree; Halem, Milton (SPIE, 2020-04-22)
      When it entered into the era of big data, Earth observing systems developed into a new stage, namely characterized by low cost, multi-national, multi-sensor and multi-modal with varying spatial and spectral resolutions ...
    • Scalability Analysis of Blockchain on a Serverless Cloud 

      Kaplunovich, Alex; Joshi, Karuna P.; Yesha, Yelena (IEEE, 2019-12-10)
      While adopting Blockchain technologies to automate their enterprise functionality, organizations are recognizing the challenges of scalability and manual configuration that the state of art present. Scalability of Hyperledger ...
    • Scantegrity II Municipal Election at Takoma Park: The First E2E Binding Governmental Election with Ballot Privacy 

      Carback, Richard; Chaum, David; Clark, Jeremy; Conway, John; Essex, Aleksander; Herrnson, Paul S.; Mayberry, Travis; Popoveniuc, Stefan; Rivest, Ronald L.; Shen, Emily; Sherman, Alan T.; Vora, Poorvi L. (2009-11-03)
      On November 3, 2009, voters in Takoma Park, Maryland, cast ballots for the mayor and city council members using the Scantegrity II voting system—the first time any end-to-end (E2E) voting system with ballot privacy has ...
    • Scantegrity III: Automatic Trustworthy Receipts, Highlighting Over/Under Votes, and Full Voter Verifiability 

      Sherman, Alan T.; Fink, Russell A.; Carback, Richard; Chaum, David (2017)
      Building on lessons learned from the November 2009 Scantegrity II election in Takoma Park, MD, we propose improvements to the Scantegrity II voting system that (1) automatically print trustworthy receipts for easier on-line ...
    • Schema-Free Structured Querying of DBpedia Data 

      Han, Lushan; Finin, Tim; Joshi, Anupam (ACM, 2012-08-11)
      We need better ways to query large linked data collections such as DBpedia. Using the SPARQL query language requires not only mastering its syntax but also understanding the RDF data model, large ontology vocabularies and ...
    • Search Engines for Semantic Web Knowledge 

      Finin, Tim; Ding, Li (2006-05-16)
      Web search engines such as Google have made people "smarter" by making knowledge readily available whenever we need to look up a fact, evaluate options or learn about a topic. The Semantic Web effort aims to make such ...
    • Search on the Semantic Web 

      Ding, Li; Joshi, Anupam; Peng, Yun; Pan, Rong; Reddivari, Pavan (2005-09-01)
      The Semantic Web provides a way to encode information and knowledge on web pages in a form that is easier for computers to understand and process. This article discusses the issues underlying the discovery, indexing and ...
    • Searching for Common Sense: Populating Cyc from the Web 

      Matuszek, Cynthia; Witbrock, Michael; Kahlert, Robert C.; Cabral, John; Schneider, Dave; Shah, Purvesh; Lenat, Doug (Association for the Advancement of Artificial Intelligence (AAAI), 2005-07)
      The Cyc project is predicated on the idea that effective machine learning depends on having a core of knowledge that provides a context for novel learned information – what is known informally as “common sense.” Over the ...
    • Second harmonic generation (SHG) from resonant GaAs gratings 

      de Ceglia, D.; D’Aguanno, G.; Mattiucci, N.; Vincenti, M.A.; Scalora, M. (OSA Publishing, 2011-05-22)
      We study SHG in nonlinear (NL), GaAs gratings. We find large enhancement of conversion efficiency when the pump field excites the guided mode resonances (GMRs) [1] of the grating. Under these circumstances the spectrum ...
    • Second harmonic generation from metallo-dielectric multilayered structures in the plasmonic regime 

      Mattiucci, Nadia; D’Aguanno, Giuseppe; Bloemer, Mark J.
      We present a theoretical study on second harmonic generation from metallo-dielectric multilayered structures in the plasmonic regime. In particular we analyze the behavior of structures made of Ag (silver) and MgF₂ ...
    • Second harmonic generation in one-dimensional photonic crystals: optimization procedure 

      Centini, Marco; D'Aguanno, Giuseppe; Sciscione, Letizia; Sibilia, Concita; Bertolotti, Mario; Scalora, Michael; Bloemer, Mark J. (SPIE, 2004-09-15)
      We present a new concept for efficient second harmonic generation that is based upon the interference of counter-propagating waves in multilayer structures. We show that phase matching and quasi phase matching are not ...
    • Second Space: A Generative Model For The Blogosphere 

      Karandikar, Amit; Java, Akshay; Joshi, Anupam; Finin, Tim; Yesha, Yelena; Yesha, Yaacov (AAAI, 2008-03-31)
      Web graphs have been very useful in the structural and statistical analysis of the web. Various models have been proposed to simulate web graphs that generate degree distributions similar to the web. Real world blog networks ...
    • Second-harmonic generation from a positive-negative index material heterostructure 

      Mattiucci, Nadia; D’Aguanno, Giuseppe; Bloemer, Mark J.; Scalora, Michael (American Physical Society (APS), 2005-12-21)
      Resonant cavities have been widely used in the past to enhance material, nonlinear response. Traditional mirrors include metallic films and distributed Bragg reflectors. In this paper we propose negative index material ...
    • Secrecy Outage of Cooperative Relay Network With and Without Eavesdropper’s Direct Link 

      Joshi, Anupam; Chopra, Khyati; Bose, Ranjan (IEEE, 2017-10-23)
      In this paper, a source communicates to the destination with the cooperation of a relay, in the presence of an eavesdropper. All the links undergo Rayleigh fading and perfect decoding at the relays is not considered. The ...
    • Secrecy Outage Performance of Cooperative Relay Network With Diversity Combining 

      Chopra, Khyati; Bose, Ranjan; Joshi, Anupam (IEEE, 2017-12-01)
      In this paper, the secrecy outage probability of threshold-based decode-and-forward (DF) cooperative relay network is evaluated. Unlike other works to date, we assume combining of direct and relayed signals both at the ...
    • Secrecy Performance of Threshold-Based Cognitive Relay Network With Diversity Combining 

      Chopra, Khyati; Bose, Ranjan; Joshi, Anupam (IEEE, 2018-10-01)
      In the spectrum sharing mode, the transmitting power of the secondary user (SU) is optimally controlled, such that no additional interference occurs at the primary user (PU). In this paper, the secrecy outage performance ...
    • Secrecy Performance of Threshold-Based Decode-and-Forward Cooperative Cognitive Radio Network 

      Chopra, Khyati; Bose, Ranjan; Joshi, Anupam (IET, 2017-02-28)
      This study evaluates the intercept and outage probability of a decode-and-forward (DF) underlay cognitive radio network. The secondary users are subject to interference limitations from the primary network, with an ...