Now showing items 22905-22924 of 31980

    • Q&A: Expansion microscopy 

      Gao, Ruixuan; Asano, Shoh M; Boyden, Edward (Biomed Central Ltd, 2017-06)
      Expansion microscopy (ExM) is a recently invented technology that uses swellable charged polymers, synthesized densely and with appropriate topology throughout a preserved biological specimen, to physically magnify the ...
    • Q-Learning and Enhanced Policy Iteration in Discounted Dynamic Programming 

      Bertsekas, Dimitri P; Yu, Huizhen (Institute for Operations Research and the Management Sciences (INFORMS), 2012-02)
      We consider the classical finite-state discounted Markovian decision problem, and we introduce a new policy iteration-like algorithm for finding the optimal state costs or Q-factors. The main difference is in the policy ...
    • Q-learning and policy iteration algorithms for stochastic shortest path problems 

      Yu, Huizhen; Bertsekas, Dimitri P. (Springer-Verlag, 2012-04)
      We consider the stochastic shortest path problem, a classical finite-state Markovian decision problem with a termination state, and we propose new convergent Q-learning algorithms that combine elements of policy iteration ...
    • The q-PushASEP: A New Integrable Model for Traffic in 1+1 Dimension 

      Corwin, Ivan; Petrov, Leonid (Springer-Verlag, 2015-02)
      We introduce a new interacting (stochastic) particle system q-PushASEP which interpolates between the q [italicized q]-TASEP of Borodin and Corwin (Probab Theory Relat Fields 158(1–2):225–400, 2014; see also Borodin et ...
    • The Q[superscript p][subscript Weak] experiment 

      Androic, D.; Armstrong, D. S; Asaturyan, A.; Averett, T.; Beaufait, J.; e.a. (Springer-Verlag, 2013-02)
      In May 2012, the Q[superscript p][subscript Weak] collaboration completed a two year measurement program to determine the weak charge of the proton Q[superscript p][subscript Weak] = ( 1 - 4sin [superscript 2] θ[subscript ...
    • QCD axion window and low-scale inflation 

      Yin, Wen; Takahashi, Fuminobu; Guth, Alan (American Physical Society, 2018-07)
      We show that the upper bound of the classical QCD axion window can be significantly relaxed for low-scale inflation. If the Gibbons-Hawking temperature during inflation is lower than the QCD scale, the initial QCD axion ...
    • QCD inequalities for hadron interactions 

      Detmold, William (American Physical Society, 2015-06)
      We derive generalizations of the Weingarten-Witten QCD mass inequalities for particular multihadron systems. For systems of any number of identical pseudoscalar mesons of maximal isospin, these inequalities prove that near ...
    • QCD PRECISION MEASUREMENTS AND STRUCTURE FUNCTION EXTRACTION AT A HIGH STATISTICS, HIGH ENERGY NEUTRINO SCATTERING EXPERIMENT: NuSOnG 

      Conrad, Janet; Fisher, Peter H.; Formaggio, Joseph A.; Karagiorgi, Georgia Stelios; Milner, Richard G.; e.a. (World Scientific, 2010-01)
      We extend the physics case for a new high-energy, ultra-high statistics neutrino scattering experiment, NuSOnG (Neutrino Scattering On Glass) to address a variety of issues including precision QCD measurements, extraction ...
    • QED radiative corrections to low-energy Møller and Bhabha scattering 

      Epstein, Charles S.; Milner, Richard G (American Physical Society, 2016-08)
      We present a treatment of the next-to-leading-order radiative corrections to unpolarized Møller and Bhabha scattering without resorting to ultrarelativistic approximations. We extend existing soft-photon radiative corrections ...
    • qFibrosis: A fully-quantitative innovative method incorporating histological features to facilitate accurate fibrosis scoring in animal model and chronic hepatitis B patients 

      Xu, Shuoyu; Wang, Yan; Tai, Dean C.S.; Wang, Shi; Cheng, Chee Leong; e.a. (Elsevier, 2014-02)
      Background & Aims: There is increasing need for accurate assessment of liver fibrosis/cirrhosis. We aimed to develop qFibrosis, a fully-automated assessment method combining quantification of histopathological architectural ...
    • QLEDs for displays and solid-state lighting 

      Supran, Geoffrey James Sasaji; Shirasaki, Yasuhiro; Song, Katherine Wei; Caruge, Jean-Michel; Kazlas, Peter T.; e.a. (Cambridge University Press (Materials Research Society), 2013-09)
      The mainstream commercialization of colloidal quantum dots (QDs) for light-emitting applications has begun: Sony televisions emitting QD-enhanced colors are now on sale. The bright and uniquely size-tunable colors of ...
    • QnAs with Susan L. Lindquist 

      Nair, Prashant; Lindquist, Susan (National Academy of Sciences of the United States of America, 2011-11)
      Prions defy molecular biology’s central dogma. Misfolded proteins that self-perpetuate, prions were first isolated in the early 1980s as the cause of a fatal sheep disease called scrapie. Since then, prions have been ...
    • qSR: a quantitative super-resolution analysis tool reveals the cell-cycle dependent organization of RNA Polymerase I in live human cells 

      Andrews, James Owen; Conway, W.; Cho, Won-ki; Narayanan, Arjun; Spille, Jan Hendrik; e.a. (Nature Publishing Group, 2018-05)
      We present qSR, an analytical tool for the quantitative analysis of single molecule based super-resolution data. The software is created as an open-source platform integrating multiple algorithms for rigorous spatial and ...
    • A Quadratic Regulator-Based Heuristic for Rapidly Exploring State Space 

      Glassman, Elena L.; Tedrake, Russell Louis (Institute of Electrical and Electronics Engineers (IEEE), 2010-07)
      Kinodynamic planning algorithms like Rapidly-Exploring Randomized Trees (RRTs) hold the promise of finding feasible trajectories for rich dynamical systems with complex, nonconvex constraints. In practice, these algorithms ...
    • Quadri-stability of a spatially ambiguous auditory illusion 

      Bainbridge, Constance M.; Bainbridge, Wilma A.; Oliva, Aude (Frontiers Research Foundation, 2015-01)
      In addition to vision, audition plays an important role in sound localization in our world. One way we estimate the motion of an auditory object moving towards or away from us is from changes in volume intensity. However, ...
    • Quadruped Bounding Control with Variable Duty Cycle via Vertical Impulse Scaling 

      Park, Hae won; Chuah, Meng Yee; Kim, Sangbae (Institute of Electrical and Electronics Engineers (IEEE), 2014-09)
      This paper introduces a bounding gait control algorithm that allows a successful implementation of duty cycle modulation in the MIT Cheetah 2. Instead of controlling leg stiffness to emulate a ‘springy leg’ inspired from ...
    • Qualitative investigation of theoretical models: the value of process tracing 

      Lorentzen, P.; Paine, J.; Fravel, Maris Taylor (Sage Publications, 2016-08)
      Political scientists frequently use qualitative evidence to support or evaluate the empirical applicability of formal models. Despite this widespread practice, neither the qualitative methods literature nor research on ...
    • Qualitative properties of α-fair policies in bandwidth-sharing networks 

      Zhong, Y.; Shah, Devavrat; Tsitsiklis, John N. (Institute of Mathematical Statistics, 2014-02)
      We consider a flow-level model of a network operating under an α-fair bandwidth sharing policy (with α > 0) proposed by Roberts and Massoulié [Telecomunication Systems 15 (2000) 185–201]. This is a probabilistic model that ...
    • Qualitative properties of α-weighted scheduling policies 

      Shah, Devavrat; Tsitsiklis, John N.; Zhong, Yuan (Association for Computing Machinery, 2010-06)
      We consider a switched network, a fairly general constrained queueing network model that has been used successfully to model the detailed packet-level dynamics in communication networks, such as input-queued switches ...
    • Qualitatively Different T Cell Phenotypic Responses to IL-2 versus IL-15 Are Unified by Identical Dependences on Receptor Signal Strength and Duration 

      Arneja, Abhinav; Johnson, Hannah; Gabrovsek, Laura; Lauffenburger, Douglas A.; White, Forest M. (American Association of Immunologists, 2013-12)
      IL-2 and IL-15 are common γ-chain family cytokines involved in regulation of T cell differentiation and homeostasis. Despite signaling through the same receptors, IL-2 and IL-15 have non-redundant roles in T cell biology, ...