Now showing items 1-20 of 1289

    • The 2nu-SVM: A Cost-Sensitive Extension of the nu-SVM 

      Davenport, Mark A. (2005-12-01)
      Standard classification algorithms aim to minimize the probability of making an incorrect classification. In many important applications, however, some kinds of errors are more important than others. In this report we ...
    • 3-D Local Radon Power Spectra for Seismic Attribute Extraction 

      Steeghs, Philippe; Fokkema, Jacob T; Diephuis, Gerhard (1998-01-15)
      In this paper we discuss a method for volume attribute extraction that is based on a new type of local Radon power spectrum. The new algorithm results in robust and geologically meaningful volume attributes, such as ...
    • 3D Geometry Coding using Mixture Models and the Estimation Quantization Algorithm 

      Lavu, Sridhar (2002-09-01)
      3D surfaces are used in applications such as animations, 3D object modeling and visualization. The geometries of such surfaces are often approximated using polygonal meshes. This thesis aims to compress 3D geometry meshes ...
    • 3D microfabrication of single-wall carbon nanotube/polymer composites by two-photon polymerization lithography 

      Ushiba, Shota; Shoji, Satoru; Masui, Kyoko; Kuray, Preeya; Kono, Junichiro; Kawata, Satoshi (2013)
      We present a method to develop single-wall carbon nanotube (SWCNT)/polymer composites into arbitrary three-dimensional micro/nano structures. Our approach, based on two-photon polymerization lithography, allows one to ...
    • 3D printed fiber optic faceplates by custom controlled fused deposition modeling 

      Wang, Ye; Gawedzinski, John; Pawlowski, Michal E.; Tkaczyk, Tomasz S. (2018)
      A 3D printing technique for manufacturing air-clad coherent fiber optic faceplates is presented. The custom G-code programming is implemented on a fused deposition modeling (FDM) desktop printer to additively draw optical ...
    • 802.11b Operating in a Mobile Channel: Performance and Challenges 

      Steger, Christopher; Radosavljevic, Predrag; Frantz, Patrick (2003-09-20)
      In the past, the worlds of wireless voice and data transmission have been largely disjoint. Voice traffic has been carried over circuit-switched cellular links, and data has been largely restricted to packet-switched ...
    • A Context-Aware Trust Framework for Resilient Distributed Cooperative Spectrum Sensing in Dynamic Settings 

      Vosoughi, Aida; Cavallaro, Joseph R.; Marshall, Alan (2017)
      Cognitive radios enable dynamic spectrum access where secondary users (SUs) are allowed to operate on the licensed spectrum bands on an opportunistic noninterference basis. Cooperation among the SUs for spectrum sensing ...
    • A Miniaturized QEPAS Trace Gas Sensor with a 3D-Printed Acoustic Detection Module 

      Yang, Xiaotao; Xiao, Youhong; Ma, Yufei; He, Ying; Tittel, Frank K. (2017)
      A 3D printing technique was introduced to a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and is reported for the first time. The acoustic detection module (ADM) was designed and fabricated using the 3D printing ...
    • A novel mathematical method for disclosing oscillations in gene transcription: A comparative study 

      Antoulas, Athanasios C.; Zhu, Bokai; Zhang, Qiang; York, Brian; O'Malley, Bert W.; Dacso, Clifford C. (2018)
      Circadian rhythmicity, the 24-hour cycle responsive to light and dark, is determined by periodic oscillations in gene transcription. This phenomenon has broad ramifications in physiologic function. Recent work has disclosed ...
    • A Probabilistic Framework for Deep Learning 

      Patel, Ankit B.; Nguyen, Tan; Baraniuk, Richard G. (2016)
      We develop a probabilistic framework for deep learning based on the Deep Rendering Mixture Model (DRMM), a new generative probabilistic model that explicitly capture variations in data due to latent task nuisance variables. ...
    • A room-temperature mid-infrared photodetector for on-chip molecular vibrational spectroscopy 

      Zheng, Bob; Zhao, Hangqi; Cerjan, Ben; Yazdi, Sadegh; Ringe, Emilie; Nordlander, Peter; Halas, Naomi J. (2018)
      Infrared (IR) photodetection is of major scientific and technical interest since virtually all molecules exhibit characteristic vibrational modes in the mid-infrared region of the spectrum, giving rise to molecular ...
    • A terahertz band-pass resonator based on enhanced reflectivity using spoof surface plasmons 

      Liu, Jingbo; Mendis, Rajind; Mittleman, Daniel M. (2013)
      We demonstrate a band-pass resonator in the terahertz (THz) range, based on a frequency-selective designer reflector. The resonator consists of a parallel-plate waveguide, a designed groove pattern cut into the output facet ...
    • Absorption Spectroscopy of an Individual Fano Cluster 

      Yorulmaz, Mustafa; Hoggard, Anneli; Zhao, Hangqi; Wen, Fangfang; Chang, Wei-Shun; Halas, Naomi J.; Nordlander, Peter; Link, Stephan (2016)
      Plasmonic clusters can exhibit Fano resonances with unique and tunable asymmetric line shapes, which arise due to the coupling of bright and dark plasmon modes within each multiparticle structure. These structures are ...
    • Accelerating Computer Vision Algorithms Using OpenCL Framework on Mobile Devices - A Case Study 

      Wang, Guohui; Xiong, Y.; Yun, Jay; Cavallaro, Joseph R. (2013-06)
      Recently, general-purpose computing on graphics processing units (GPGPU) has been enabled on mobile devices thanks to the emerging heterogeneous programming models such as OpenCL. The capability of GPGPU on mobile devices ...
    • Accurate measurement of nanomechanical motion in a fiber-taper nano-optomechanical system 

      Zheng, Huadan; Qiu, Weiqia; Gu, Xiaohang; Zhang, Yu; Zhu, Wenguo; Huang, Bincheng; Lu, Huihui; Guan, Heyuan; Xiao, Yi; Zhong, Yongchun; Fang, Junbin; Luo, Yunhan; Zhang, Jun; Yu, Jianhui; Tittel, Frank; Chen, Zhe (2019)
      The hybrid systems that couple optical and mechanical degrees of freedom in nanoscale devices offer an unprecedented opportunity and development in laboratories worldwide. A nano-optomechanical (NOM) system that converts ...
    • Achievable Diversity and Multiplexing in Multiple Antenna Systems with Quantized Power Control 

      Khoshnevis, Ahmad; Sabharwal, Ashutosh (2005-05-01)
      We consider a multiple antenna system with finite rate feedback, in which the quantized channel state information at the transmitter is used solely for temporal power control. We show that similar to systems without feedback, ...
    • Achievable Rates for Arbitrary Network Topologies with â Cheapâ Nodes 

      Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-05-01)
      In this paper, we derive achievable rates for arbitrary network topologies consisting of â cheapâ nodes. A node is labeled â cheapâ if its radio can only operate in TDD mode when transmitting and receiving in the ...
    • Achromatized endomicroscope objective for optical biopsy 

      Kyrish, Matthew; Tkaczyk, Tomasz S. (2013)
      Currently, researchers and clinicians lack achromatized endomicroscope objectives that are as narrow as biopsy needles. We present a proof-of-concept prototype that validates the optical design of an NA0.4 objective. The ...
    • Active dielectric antenna on chip for spatial light modulation 

      Qiu, Ciyuan; Chen, Jianbo; Xia, Yang; Xu, Qianfan (2012-11-14)
      Integrated photonic resonators are widely used to manipulate light propagation in an evanescently-coupled waveguide. While the evanescent coupling scheme works well for planar optical systems that are naturally waveguide ...
    • Adaptive Fault Detection and Tolerance for Robots 

      Visinsky, Monica L.; Cavallaro, Joseph R.; Walker, Ian D. (1994-08-01)
      In existing robot fault detection schemes, sensed values of the joint status (position, velocity, etc.) are typically compared against expected or desired values, and if a given threshold is exceeded, a fault is inferred. ...