Now showing items 836-855 of 911

    • A Ubiquitous Context-Aware Environment for Surgical Training 

      Ordonez, Patti; Kodeswaran, Palanivel Andiappan; Korolev, Vladimir; Li, Wenjia; Walavalkar, Onkar; Joshi, Anupam; Finin, Tim; Yesha, Yelena; George, Ivan (IEEE, 2007-08-06)
      The age of technology has changed the way that surgeons are being trained. Traditional methodologies for training can include lecturing, shadowing, apprenticing, and developing skills within live clinical situations. ...
    • UCO: A Unified Cybersecurity Ontology 

      Syed, Zareen; Padia, Ankur; Finin, Tim; Mathews, Lisa; Joshi, Anupam (AAAI Press, 2016-02-12)
      In this paper we describe the Unified Cybersecurity Ontology (UCO) that is intended to support information integration and cyber situational awareness in cybersecurity systems. The ontology incorporates and integrates ...
    • Ultra-Broadband Matching and Funneling of Light at the Plasmonic Brewster-angle 

      Argyropoulos, Christos; D’Aguanno, G.; Mattiucci, N.; Bloemer, M. J.; Alù, Andrea (OSA Publishing, 2012)
      The concept of plasmonic Brewster angle tunneling is applied to realize ultra-broadband funneling of electromagnetic radiation through plasmonic gratings and more exotic applications, such as omnidirectional absorbers and ...
    • Ultra-broadband, polarization-independent, wide-angle absorption in impedance-matched metamaterials with anti-reflective moth-eye surfaces 

      Contractor, Rushin; D’Aguanno, Giuseppe; Menyuk, Curtis (OSA Publishing, 2018)
      We computationally study periodic impedance-matched metal-dielectric metamaterials and the advantage of imprinting moth-eye surfaces on them. Impedance-matched metamaterials are known to act as strong, polarization-independent, ...
    • Ultra-wide Band, Polarization-Independent, Omnidirectional Absorbers 

      D’Aguanno, G.; Mattiucci, N.; Aközbek, N.; Bloemer, M. J. (OSA Publishing, 2012)
      Based on the effective medium theory for multilayers, we present the design of several all-angle, polarization-insensitive absorbers spanning the visible, near-IR and part of the mid-IR (from 400nm to 3500nm) using periodic, ...
    • Ultrashort Pulse Propagation in Negative Index Materials: From Negative Refraction to Nonlinear Pulse Propagation 

      Scalora, Michael; Bloemer, Mark J.; Bowden, Charles M.; D’Aguanno, Giuseppe; Mattiucci, Nadia (2004-12-12)
      Negative index materials NIMs hold the promise for super lensing of electromagnetic radiation for applications in radar, THz, and possibly at optical frequencies. We have developed a new vector pulse propagation method ...
    • Ultraslow light pulses in a nonlinear metamaterial 

      D’Aguanno, Giuseppe; Mattiucci, Nadia; Bloemer, Mark J. (OSA Publishing, 2008-07-01)
      We find the analytical expression for the threshold intensity necessary to launch ultraslow light pulses in a metamaterial with simultaneous cubic electric and magnetic nonlinearity. The roles played by the permittivity, ...
    • Ultraviolet surface-enhanced Raman scattering at the plasmonic band edge of a metallic grating 

      Mattiucci, Nadia; D’Aguanno, Giuseppe; Everitt, Henry O.; Foreman, John V.; Callahan, John M.; Buncick, Milan C.; Bloemer, Mark J.
      Surface-enhanced Raman Scattering (SERS) is studied in sub-wavelength metallic gratings on a substrate using a rigorous electromagnetic approach. In the ultraviolet SERS is limited by the metallic dampening, yet enhancements ...
    • UMBC at SemEval-2018 Task 8: Understanding Text about Malware 

      Padia, Ankur; Roy, Arpita; Satyapanich, Taneeya W.; Ferraro, Francis; Pan, Shimei; Park, Youngja; Joshi, Anupam; Finin, Tim (2018-06-05)
      We describe the systems developed by the UMBC team for 2018 SemEval Task 8, SecureNLP (Semantic Extraction from CybersecUrity REports using Natural Language Processing). We participated in three of the sub-tasks: (1) ...
    • UMBC at TREC 12 

      Kallurkar, Srikanth; Shi, Yongmei; Cost, R. Scott; Nicholas, Charles; Java, Akshay; James, Christopher; Rajavaram, Sowjanya; Shanbhag, Vishal; Bhatkar, Sachin; Ogle, Drew (2003-11-18)
      We present the results of UMBC’s participation in the Web and Novelty tracks. We explored various heuristics-based link analysis approaches to the Topic Distillation task. For the novelty task we tried several methods ...
    • UMBC_EBIQUITY-CORE: Semantic Textual Similarity Systems 

      Han, Lushan; Kashyap, Abhay L.; Finin, Tim; Mayfield, James; Weese, Johnathan (2013-06-13)
      We describe three semantic text similarity systems developed for the *SEM 2013 STS shared task and the results of the corresponding three runs. All of them used a word similarity feature that combined LSA word similarity ...
    • UMBCTAC: A Balanced Bidding Agent 

      Ding, Li; Shi, Yongmei; Ding, Zhongli; Pan, Rong; Finin, Tim (2002-12-14)
      UMBCTAC is one of the top ranking agents in the 3rd International Trading Agent Competition (TAC). A TAC game has multiple auctions running on different but interrelated resources simultaneously, and 8 trading agents will ...
    • Understanding and representing the semantics of large structured documents 

      Rahman, Muhammad Mahbubur (2018-10-08)
      Understanding large, structured documents like scholarly articles, requests for proposals or business reports is a complex and difficult task. It involves discovering a document's overall purpose and subject(s), understanding ...
    • Understanding and Supporting Individuals Experiencing Severely Constraining Situational Impairments 

      Saulynas, Sidas; Kuber, Ravi (Springer Berlin Heidelberg, 2019-12-04)
      A special strain of situational impairment, termed “Severely Constraining Situational Impairments” (SCSI), was explored from a novel qualitative perspective. When a severely impairing event presents, the multitude and ...
    • Understanding Issues in Cloud Forensics: Two Hypothetical Case Studies 

      Dykstra, Josiah; Sherman, Alan T. (2011-05-25)
      The inevitable vulnerabilities and criminal targeting of cloud environments demand an understanding of how digital forensic investigations of the cloud can be accomplished. We present two hypothetical case studies of cloud ...
    • Understanding the Logical and Semantic Structure of Large Documents 

      Rahman, Muhammad Mahbubur (SIAM, 2017-04-27)
      Up-to-the-minute language understanding approaches are mostly focused on small documents such as newswire articles, blog posts, product reviews and discussion forum en- tries. Understanding and extracting information from ...
    • Underwater Hyperspectral Target Detection with Band Selection 

      Fu, Xianping; Shang, Xiaodi; Sun, Xudong; Yu, Haoyang; Song, Meiping; Chang, Chein-I (MDPI, 2020-03-25)
      Compared to multi-spectral imagery, hyperspectral imagery has very high spectral resolution with abundant spectral information. In underwater target detection, hyperspectral technology can be advantageous in the sense of ...
    • Unequal Representation and Gender Stereotypes in Image Search Results for Occupations 

      Kay, Matthew; Matuszek, Cynthia; Munson, Sean A. (ACM, 2015-04-18)
      Information environments have the power to affect people's perceptions and behaviors. In this paper, we present the results of studies in which we characterize the gender bias present in image search results for a variety ...