Now showing items 71-90 of 226

  • Fermi-edge superfluorescence from a quantum-degenerate electron-hole gas 

    Kim, Ji-Hee; Noe, G. Timothy II; McGill, Stephen A.; Wang, Yongrui; Wojcik, Aleksander K.; Belyanin, Alexey A.; Kono, Junichiro (2013)
    Nonequilibrium can be a source of order. This rather counterintuitive statement has been proven to be true through a variety of fluctuation-driven, self-organization behaviors exhibited by out-of-equilibrium, many-body ...
  • Finite population size effects in quasispecies models with single-peak fitness landscape 

    Saakian, David B.; Deem, Michael W.; Hu, Chin-Kun (2012-04)
    We consider finite population size effects for Crow-Kimura and Eigen quasispecies models with single-peak fitness landscape. We formulate accurately the iteration procedure for the finite population models, then derive ...
  • Fluid Electric Force Microscopy for Charge Density Mapping in Biological Systems 

    Johnson, Amber S.; Nehl, Colleen L.; Mason, Monica G.; Hafner, Jason H. (2003-10-06)
  • Folding Circular Permutants of IL-1b: Route Selection Driven by Functional Frustration 

    Capraro, Dominique T.; Gosavi, Shachi; Roy, Melinda; Onuchic, José N.; Jennings, Patricia A. (2012-06)
    Interleukin-1b (IL-1b) is the cytokine crucial to inflammatory and immune response. Two dominant routes are populated in the folding to native structure. These distinct routes are a result of the competition between early ...
  • Free energy landscape for the binding process of Huperzine A to acetylcholinesterase 

    Bai, Fang; Xu, Yechun; Chen, Jing; Liu, Qiufeng; Gu, Junfeng; Wang, Xicheng; Ma, Jianpeng; Li, Honglin; Onuchic, José N.; Jiang, Hualiang (2012)
    Drug-target residence time (t = 1/koff, where koff is the dissociation rate constant) has become an important index in discovering betteror best-in-class drugs. However, little effort has been dedicated to developing ...
  • Frustration in biomolecules 

    Ferreiro, Diego U.; Komives, Elizabeth A.; Wolynes, Peter G. (2014)
    Biomolecules are the prime information processing elements of living matter. Most of these inanimate systems are polymers that compute their own structures and dynamics using as input seemingly random character strings of ...
  • Fundamental optical processes in armchair carbon nanotubes 

    Haroz, Erik H.; Duque, Juan G.; Tu, Xiaomin; Zheng, Ming; Walker, Angela R. Hight; Hauge, Robert H.; Doorn, Stephen K.; Kono, Junichiro (2013)
    Single-wall carbon nanotubes provide ideal model one-dimensional (1-D) condensed matter systems in which to address fundamental questions in many-body physics, while, at the same time, they are leading candidates for ...
  • Funneling and frustration in the energy landscapes of some designed and simplified proteins 

    Truong, Ha H.; Kim, Bobby L.; Schafer, Nicholas P.; Wolynes, Peter G. (2013)
    We explore the similarities and differences between the energy landscapes of proteins that have been selected by nature and those of some proteins designed by humans. Natural proteins have evolved to function as well as ...
  • Genomics-aided structure prediction 

    Sulkowska, Joanna I.; Morcos, Faruck; Weigt, Martin; Hwa, Terence; Onuchic, José N. (2012)
    We introduce a theoretical framework that exploits the everincreasing genomic sequence information for protein structure prediction. Structure-based models are modified to incorporate constraints by a large number of ...
  • Giant tunable Faraday effect in a semiconductor magneto-plasma for broadband terahertz polarization optics 

    Arikawa, Takashi; Wang, Xiangfeng; Belyanin, Alexey A.; Kono, Junichiro (2012)
    We report on a giant Faraday effect in an electron plasma in n- InSb probed via polarization-resolved terahertz (THz) time-domain spectroscopy. Polarization rotation angles and ellipticities reach as large as π/2 and ...
  • GRB110721A: An Extreme Peak Energy and Signatures of the Photosphere 

    Baring, M.G.; Axelsson, M.; Baldini, L.; Barbiellini, G.; Bellazzini, R.; Bregeon, J.; Brigida, M.; Bruel, P.; Buehler, R.; Caliandro, G.A.; Cameron, R.A.; Caraveo, P.A.; Cecchi, C.; Chaves, R.C.G.; Chekhtman, A.; Chiang, J.; Claus, R.; Conrad, J.; Cutini, S.; D'Ammando, F.; de Palma, F.; Dermer, C.D.; do Couto e Silva, E.; Drell, P.S.; Favuzzi, C.; Fegan, S.J.; Ferrara, E.C.; Focke, W.B.; Fukazawa, Y.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Giglietto, N.; Giroletti, M.; Godfrey, G.; Guiriec, S.; Hadasch, D.; Hanabata, Y.; Hayashida, M.; Hou, X.; Iyyani, S.; Jackson, M.S.; Kocevski, D.; Kuss, M.; Larsson, J.; Longo, F.; Loparco, F.; Lundman, C.; Mazziotta, M.N.; McEnery, J.E.; Mizuno, T.; Monzani, M.E.; Moretti, E.; Morselli, A.; Murgia, S.; Nuss, E.; Nymark, T.; Ohno, M.; Omodei, N.; Pesce-Rollins, M.; Piron, F.; Pivato, G.; Racusin, J.L.; Rainò, S.; Razzano, M.; Razzaque, S.; Reimer, A.; Roth, M.; Ryde, F.; Sanchez, D.A.; Sgrò, C.; Siskind, E.J.; Spandre, G.; Spinelli, P.; Stamatikos, M.; Tibaldo, L.; Tinivella, M.; Usher, T.L.; Vandenbroucke, J.; Vasileiou, V.; Vianello, G.; Vitale, V.; Waite, A.P.; Winer, B.L.; Wood, K.S.; Burgess, J.M.; Bhat, P.N.; Bissaldi, E.; Briggs, M.S.; Connaughton, V.; Fishman, G.; Fitzpatrick, G.; Foley, S.; Gruber, D.; Kippen, R.M.; Kouveliotou, C.; Jenke, P.; McBreen, S.; McGlynn, S.; Meegan, C.; Paciesas, W.S.; Pelassa, V.; Preece, R.; Tierney, D.; von Kienlin, A.; Wilson-Hodge, C.; Xiong, S.; Pe'er, A.; Pe'er, A. (2012)
    GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The burst consisted of one major emission episode which lasted ...
  • Ground-based magnetometer determination of in situ Pc4–5 ULF electric field wave spectra as a function of solar wind speed 

    Rae, I. Jonathan; Mann, Ian R.; Murphy, Kyle R.; Ozeke, Louis G.; Milling, David K.; Chan, Anthony A.; Elkington, Scot R.; Honary, Farideh (2012)
    We present a statistical characterization of ground-based ultra-low-frequency ( 1–15 mHz) magnetic wave power spectral densities (PSDs) as a function of latitude (corresponding to dipole L-shells from L 2.5–8), local ...
  • Hierarchy in gene expression is predictive of risk, progression, and outcome in adult acute myeloid leukemia 

    Tripathi, Shubham; Deem, Michael W. (2015)
    Cancer progresses with a change in the structure of the gene network in normal cells. We define a measure of organizational hierarchy in gene networks of affected cells in adult acute myeloid leukemia (AML) patients. With ...
  • Hierarchy of gene expression data is predictive of future breast cancer outcome 

    Chen, Man; Deem, Michael W. (2013)
    We calculate measures of hierarchy in gene and tissue networks of breast cancer patients. We find that the likelihood of metastasis in the future is correlated with increased values of network hierarchy for expression ...
  • A high-throughput three-dimensional cell migration assay for toxicity screening with mobile device-based macroscopic image analysis 

    Timm, David M.; Chen, Jianbo; Sing, David; Gage, Jacob A.; Haisler, William L.; Neeley, Shane K.; Raphael, Robert M.; Dehghani, Mehdi; Rosenblatt, Kevin P.; Killian, T.C.; Tseng, Hubert; Souza, Glauco R. (2013)
    There is a growing demand for in vitro assays for toxicity screening in three-dimensional (3D) environments. In this study, 3D cell culture using magnetic levitation was used to create an assay in which cells were patterned ...
  • How input fluctuations reshape the dynamics of a biological switching system 

    Hu, Bo; Kessler, David A.; Rappel, Wouter-Jan; Levine, Herbert (2012)
    An important task in quantitative biology is to understand the role of stochasticity in biochemical regulation. Here, as an extension of our recent work [Phys. Rev. Lett. 107, 148101 (2011)], we study how input ...
  • How input noise limits biochemical sensing in ultrasensitive systems 

    Hu, Bo; Rappel, Wouter-Jan; Levine, Herbert (2014)
    Many biological processes are regulated by molecular devices that respond in an ultrasensitive fashion to upstream signals. An important question is whether such ultrasensitivity improves or limits its ability to read out ...
  • Imaging molecular adsorption and desorption dynamics on graphene using terahertz emission spectroscopy 

    Sano, Y.; Kawayama, I.; Tabata, M.; Salek, K.A.; Murakami, H.; Wang, M.; Vajtai, R.; Ajayan, P.M.; Kono, J.; Tonouchi, M. (2014-08-13)
    Being an atomically thin material, graphene is known to be extremely susceptible to its environment, including defects and phonons in the substrate on which it is placed as well as gas molecules that surround it. Thus, any ...
  • Imaging the evolution of an ultracold strontium Rydberg gas 

    McQuillen, P.; Zhang, X.; Strickler, T.; Dunning, F.B.; Killian, T.C. (2013-01-07)
    Clouds of ultracold strontium 5s48s1S0 or 5s47d1D2 Rydberg atoms are created by two-photon excitation of laser-cooled 5s21S0 atoms. The spontaneous evolution of the cloud of low orbital angular momentum (low-ℓ) Rydberg ...
  • Improvements in short-term forecasting of geomagnetic activity 

    Bala, Ramkumar; Reiff, Patricia (2012)
    We have improved our space weather forecasting algorithms to now predict Dst and AE in addition to Kp for up to 6 h of forecast times. These predictions can be accessed in real time at http://mms.rice. edu/realtime/for ...