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  1. The influence of zeolite morphology on the conversion of methane to methanol on copper- exchanged omega zeolite ( MAZ) 

    Knorpp, Amy J.; Newton, Mark A.; Sushkevich, Vitaly L.; et al. (2019)
    Catalysis Science & Technology
    Methane is often flared due to the heavy economic burden of transportation, particularly at rural petroleum extraction sites. Directly converting methane to methanol is possible through a stepwise process with copper-exchanged zeolites. Factors affecting this conversion are not yet fully understood. Omega zeolite (MAZ) can yield 197 μmol per gram-zeolite, the highest reported thus far. Here we show that the synthesis and resulting morphology ...
    Journal Article
  2. Natural hypothalamic circuit dynamics underlying object memorization 

    Kosse, Christin; Burdakov, Denis (2019)
    Nature Communications
    Brain signals that govern memory formation remain incompletely identified. The hypothalamus is implicated in memory disorders, but how its rapidly changing activity shapes memorization is unknown. During encounters with objects, hypothalamic melanin-concentrating hormone (MCH) neurons emit brief signals that reflect object novelty. Here we show that targeted optogenetic silencing of these signals, performed selectively during the initial ...
    Journal Article
  3. On the Elevation and Suppression of Star Formation within Galaxies 

    Wang, Enci; Lilly, Simon J.; Pezzulli, Gabriele; et al. (2019)
    The Astrophysical Journal
    Journal Article
  4. Autonomous Free-Form Trenching using a Walking Excavator 

    Jud, Dominic; Leemann, Philipp; Kerscher, Simon; et al. (2019)
    IEEE Robotics and Automation Letters
    Journal Article
  5. Trajectory Optimization for Legged Robots with Slipping Motions 

    Carius, Jan; Ranftl, René; Koltun, Vladlen; et al. (2019)
    IEEE Robotics and Automation Letters
    The dynamics of legged systems are characterized by under-actuation, instability, and contact state switching. We present a trajectory optimization method for generating physically consistent motions under these conditions. By integrating a custom solver for hard contact forces in the system dynamics model, the optimal control algorithm has the authority to freely transition between open, closed, and sliding contact states along the ...
    Journal Article
  6. On the Propagation of Slip Fronts at Frictional Interfaces 

    Kammer, David; Yastrebov, Vladislav A.; Spijker, Peter; et al. (2012)
    Tribology Letters
    Journal Article
  7. Fracture energy estimates from large-scale laboratory earthquakes 

    Kammer, David; McLaskey, Gregory C. (2019)
    Earth and Planetary Science Letters
    Journal Article
  8. Rupture Termination in Laboratory‐Generated Earthquakes 

    Ke, Chun‐Yu; McLaskey, Gregory C.; Kammer, David (2018)
    Geophysical Research Letters
    Journal Article
  9. Survival of Heterogeneous Stress Distributions Created by Precursory Slip at Frictional Interfaces 

    Radiguet, Mathilde; Kammer, David; Gillet, Philippe; et al. (2013)
    Physical Review Letters
    Journal Article
  10. Rigid slab foundation subjected to strike–slip faulting: mechanisms and insights 

    Agalianos, Athanasios; De Caudron de Coquereaumont, Octave; Anastasopoulos, Ioannis (2019)
    Journal Article
  11. Length scale of interface heterogeneities selects propagation mechanism of frictional slip fronts 

    Kammer, David; Pino Muñoz, Daniel; Molinari, Jean-François (2016)
    Journal of the Mechanics and Physics of Solids
    Journal Article
  12. The existence of a critical length scale in regularised friction 

    Kammer, David; Yastrebov, Vladislav A.; Anciaux, Guillaume; et al. (2014)
    Journal of the Mechanics and Physics of Solids
    Journal Article
  13. Off-fault heterogeneities promote supershear transition of dynamic mode II cracks 

    Albertini, Gabriele; Kammer, David (2017)
    Journal of Geophysical Research. Solid Earth
    Journal Article
  14. Linear Elastic Fracture Mechanics Predicts the Propagation Distance of Frictional Slip 

    Kammer, David; Radiguet, Mathilde; Ampuero, Jean-Paul; et al. (2015)
    Tribology Letters
    Journal Article
  15. GABA and glutamate moderate beta-amyloid related functional connectivity in cognitively unimpaired old-aged adults 

    Quevenco, Frances C.; Schreiner, Simon J.; Preti, Maria Giulia; et al. (2019)
    NeuroImage: Clinical
    Background Effects of beta-amyloid accumulation on neuronal function precede the clinical manifestation of Alzheimer's disease (AD) by years and affect distinct cognitive brain networks. As previous studies suggest a link between beta-amyloid and dysregulation of excitatory and inhibitory neurotransmitters, we aimed to investigate the impact of GABA and glutamate on beta-amyloid related functional connectivity. Methods 29 cognitively ...
    Journal Article
  16. Pacific Anthropogenic Carbon Between 1991 and 2017 

    Carter, Brendan R.; Feely, Richard A.; Wanninkhof, Rik H.; et al. (2019)
    Global Biogeochemical Cycles
    We estimate anthropogenic carbon (Canth) accumulation rates in the Pacific Ocean between 1991 and 2017 from 14 hydrographic sections that have been occupied two to four times over the past few decades, with most sections having been recently measured as part of the Global Ocean Ship‐based Hydrographic Investigations Program. The rate of change of Canth is estimated using a new method that combines the extended multiple linear regression ...
    Journal Article
  17. Structure–Property Relationships in Shape Memory Metallic Glass Composites 

    Şopu, Daniel; Yuan, Xudong; Moitzi, Franco; et al. (2019)
    Metallic glass composites with shape memory crystals show enhanced plasticity and work-hardening capability. We investigate the influence of various critical structural aspects such as, the density of crystalline precipitates, their distribution and size, and the structural features and intrinsic properties of the phase on the deformation behavior of metallic amorphous Cu_64 Zr_36 composites with B2 CuZr inclusions using molecular dynamics ...
    Journal Article
  18. Stability properties of multiplicative representations of the free group 

    Iozzi, Alessandra; Kuhn, M. Gabriella; Steger, Tim (2019)
    Transactions of the American Mathematical Society
    Journal Article
  19. A Critical Role of Sodium Flux via the Plasma Membrane Na+/H+ Exchanger SOS1 in the Salt Tolerance of Rice 

    El Mahi, Houda; Pérez-Hormaeche, Javier; De Luca, Anna; et al. (2019)
    Plant Physiology
    Journal Article
  20. Holographic imaging of electromagnetic fields via electron-light quantum interference 

    Madan, Ivan; Vanacore, Giovanni M.; Pomarico, Enrico; et al. (2019)
    Science Advances
    Holography relies on the interference between a known reference and a signal of interest to reconstruct both the amplitude and the phase of that signal. With electrons, the extension of holography to the ultrafast time domain remains a challenge, although it would yield the highest possible combined spatiotemporal resolution. Here, we show that holograms of local electromagnetic fields can be obtained with combined attosecond/nanometer ...
    Journal Article

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