Now showing items 582-601 of 918

    • Parallelization for Fast Image Reconstruction using the Stochastic Origin Ensemble Method for Proton Beam Therapy 

      Avila-Soto, Fernando X.; Beri, Alec N.; Valenzuela, Eric; Wudenhe, Abenezer; Polf, Jerimy; Blenkhorn, Ari Rapkin; Graf, Jonathan S.; Khuvis, Samuel (2015)
      Proton beam therapy is becoming increasingly common in the eld of cancer treatment because of the advantages over other forms of radiation therapy. These advantages arise from the nite range of the proton beams, the ...
    • Parallelizing Natural Language Techniques for Knowledge Extraction from Cloud Service Level Agreements 

      Mittal, Sudip; Joshi, Karuna Pande; Pearce, Claudia; Joshi, Anupam (IEEE, 2015-10-19)
      To efficiently utilize their cloud based services, consumers have to continuously monitor and manage the Service Level Agreements (SLA) that define the service performance measures. Currently this is still a time and labor ...
    • Parsing IKEA Objects: Fine Pose Estimation 

      Lim, Joseph J.; Pirsiavash, Hamed; Torralba, Antonio (IEEE, 2013-12-03)
      We address the problem of localizing and estimating the fine-pose of objects in the image with exact 3D models. Our main focus is to unify contributions from the 1970s with recent advances in object detection: use local ...
    • Parsing videos of actions with segmental grammars 

      Pirsiavash, Hamed; Ramanan, Deva (IEEE, 2014-06-28)
      Real-world videos of human activities exhibit temporal structure at various scales, long videos are typically composed out of multiple action instances, where each instance is itself composed of sub-actions with variable ...
    • Participation in TAC KBP 2017: Cold Start TEDL and Low-resource EDL 

      Finin, Tim; Lawrie, Dawn; Mayfield, James; McNamee, Paul; Costello, Cash
      The JHU HLTCOE participated in the Cold Start and the edl tasks of the 2017 Text Analysis Conference Knowledge Base Population evaluation. For our sixth year of participation in Cold Start we continued our research with ...
    • Passive Encrypted IoT Device Fingerprinting with Persistent Homology 

      Collins, Joseph R.; Iorga, Michaela; Cousin, Dmitry; Chapman, David (OpenReview, 2020-12-09)
      Internet of things (IoT) devices are becoming increasingly prevalent. These devices can improve quality of life, but often present significant security risks to end users. In this work we present a novel persistent homology ...
    • PatientService : Electronic Patient Record Redaction and Delivery in Pervasive Environments 

      Choudhri, Amit; Kagal, Lalana; Joshi, Anupam; Finin, Tim; Yesha, Yelena (IEEE, 2003-06-01)
      Healthcare today is moving away from the tethered domain and becoming diffused into an environment rich with portable digital devices. In this evolving environment, the need to deliver information such as Electronic Patient ...
    • Performance Studies of the Blossom V Algorithm 

      Huang, Changling; Lowman, Christopher C.; Osborne, Brandon E.; Salib, Gabrielle M.; Blenkhorn, Ari Rapkin; Graf, Jonathan S.; Khuvis, Samuel; Gobbert, Matthias K.; Simon, Tyler; Mountain, David (2015)
      The Blossom V algorithm is used in graph theory to compute a perfect matching of minimum cost. We conducted performance studies on the algorithm using the maya cluster in the UMBC High Performance Computing Facility to ...
    • A Peridynamic Perspective on Spring-Mass Fracture 

      Levine, J. A.; Bargteil, A. W.; Corsi, C.; Tessendorf, J.; Geist, R. (ACM, 2014-07-21)
      The application of spring-mass systems to the animation of brittle fracture is revisited. The motivation arises from the recent popularity of peridynamics in the computational physics community. Peridynamic systems can be ...
    • A Personal Agent Application for the Semantic Web 

      Kumar, Subhash; Kunjithapatham, Anugeetha; Sheshagiri, Mithun; Finin, Tim; Joshi, Anupam; Peng, Yun; Cost, R. Scott (AAAI, 2002-11-01)
      The Semantic Web is a vision to simplify and improve knowledge reuse on the Web. It is all set to alter the way humans benefit from the web from active interaction to somewhat passive utilization through the proliferation ...
    • Personal Agents on the Semantic Web 

      Kunjithapatham, Anugeetha; Sheshagiri, Mithun; Finin, Tim; Joshi, Anupam; Peng, Yun (2003-10-20)
      Personal assistants gather and filter relevant information and compose it into a coherent picture with regard to the user’s preferences. An intrinsic and important prerequisite for a personal assistant or rather any agent ...
    • Personal Security Agent: KQML-based PKI 

      He, Qi; Sycara, Katia P.; Finin, Timothy W. (ACM, 1998-05-09)
      Certificate management infrastructure, a.k.a. PKI (Public Key Infrastructure), which issues and provides access to public key certificates to preserve the integrity of a public key, is fundamental for electronic commerce ...
    • Personalizing context-aware access control on mobile platforms 

      Das, Prajit Kumar; Joshi, Anupam; Finin, Tim (IEEE, 2017-12-14)
      Context-sensitive access control has been a research topic within mobile computing for more than a decade. Much of the work has focused on modeling context and representing policies. Choosing an appropriate policy for a ...
    • A Pervasive Computing Ontology for User Privacy Protection in the Context Broker Architecture 

      Chen, Harry; Finin, Tim; Joshi, Anupam (2004-07-12)
      Privacy protection is a key requirement for the future pervasive computing systems. This paper describes the design and implementation of a privacy protection framework that exploits the SOUPA policy ontology and its ...
    • A Pervasive Computing System for the Operating Room of the Future 

      Agarwal, Sheetal; Joshi, Anupam; Yesha, Yelena (2006-09-01)
      We describe a prototype Context Aware Perioperative Information System to capture and interpret data in an operating room of the future. The captured data is used to construct the context of the surgical procedure and ...
    • Pervasive Enablement of Business Processes 

      Chakraborty, Dipanjan; Lei, Hui (IEEE, 2004-01-31)
      People are an important part of many business processes. Current workflow-based implementations of business processes constrain users to the desktop environment; require them to periodically check for pending tasks; and ...
    • Phase locked harmonic localization and enhancement in an absorbing semiconductor cavity 

      Roppo, V.; Cojocaru, C.; D'Aguanno, G.; Raineri, F.; Trull, J.; Halioua, Y.; Vilaseca, R.; Raj, R.; Scalora, M. (SPIE, 2010-05-17)
      We predict and experimentally observe the enhancement by three orders of magnitude of phase mismatched second and third harmonic generation in a GaAs cavity at 650 and 433 nm, respectively, well above the absorption edge. ...
    • Phase locked harmonics etalon localization in opaque materials 

      Cojocaru, C.; Roppo, V.; D'Aguanno, G.; Raineri, F.; Trull, J.; Raj, R.; Vilaseca, R.; Scalora, M. (IEEE, 2009-07-31)
      In this work we investigate the behaviour of the phase locked second and third harmonic generated and propagating within a cavity of GaAs designed to be resonant for the fundamental field. We show that not only that the ...
    • Phase matching in the presence of feedback: higher-order terms and enhancement of second-harmonic generation 

      Centini, Marco; D'Aguanno, Giuseppe; Sciscione, Letizia; Sibilia, Concita; Bertolotti, Mario; Scalora, Michael; Bloemer, Mark J. (SPIE, 2004-07-09)
      We show that inside a multi-layer dielectric stack, consideration of higher-order, fast-oscillating interference terms between counter-propagating waves can dramatically change the dynamics of second harmonic generation, ...
    • Phase Noise and Performance Optimization in MUTC Photodetectors using the Drift-Diffusion Equations 

      Mahabadi, Seyed Ehsan Jamali; Quinlan, Franklyn J.; Carruthers, Thomas F.; Menyuk, Curtis R. (IEEE, 2018-10-04)
      We calculate the phase noise in modified unitraveling carrier (MUTC) photodetectors using the drift-diffusion equations, avoiding computationally-expensive Monte Carlo simulations. We optimize the performance over a range ...