Current transient response and role of the internal resistance in HfOx-based memristors

2020 ◽  
Vol 117 (26) ◽  
pp. 262902
Author(s):  
M. B. Gonzalez ◽  
M. Maestro-Izquierdo ◽  
F. Jiménez-Molinos ◽  
J. B. Roldán ◽  
F. Campabadal
1996 ◽  
Vol 34 (5-6) ◽  
pp. 223-232 ◽  
Author(s):  
M. Majone ◽  
P. Massanisso ◽  
A. Carucci ◽  
K. Lindrea ◽  
V. Tandoi

In various activated sludge systems, sludge grows under transient (unbalanced) conditions and storage of internal polymers becomes important. Differences in storage capacity under transients are often used to explain kinetic control of bulking, but storage is neither studied in detail nor usually included in modelling. For this reason, the transient response of different aerobic mixed cultures was studied by experimentally determining the role of storage. Two different mixed cultures (bulking and non-bulking) were selected in an acetate-limited medium, by continuous or intermittent feeding of a CSTR, respectively. Batch tests were used to investigate the transient response of the selected cultures as a function of the starvation time and of the ratio of the initial concentration of the substrate and sludge biomass (So/Xo). In most experimental conditions, both cultures showed that the storage of poly-hydroxybutyrate (PHB) is in general the prevailing mechanism of substrate removal. In particular, the culture dominated by floc-formers showed very fast response to the substrate spike with a high observed yield. Storage was practically the only metabolism occurring. The ratio So/Xo did not have a major role in determining the type and extent of the response. Starvation did not affect the response of the floc-formers to transient conditions. For the filamentous bacteria, both the growth response and, even more significantly, the storage response were negatively affected. Hence, the difference in storage capacity between filamentous and floc-forming bacteria was further increased.


2016 ◽  
Vol 3 (1) ◽  
Author(s):  
S. De La Luz-Merino ◽  
M. E. Calixto ◽  
A. Méndez-Blas ◽  
B. Marí-Soucase

AbstractIn this work, the electrodeposition and characterization of 1D CuInSe2 (CIS) nanostructures formed by the assistance of porous silicon (PSi) templates is presented. The formation of CIS was found to be potential dependent on the specific substrate being used. The filling process of the pores of PSi template was studied directly by the current transient response during electrodeposition of nanostructured CIS and results were compared with FESEM images. CIS nanostructures were fully characterized by using FE-SEM, FIB, XRD, and Raman spectroscopy, in order to know their physical properties.


Author(s):  
L. C. Auton ◽  
C. W. MacMinn

The radially outward flow of fluid through a porous medium occurs in many practical problems, from transport across vascular walls to the pressurization of boreholes in the subsurface. When the driving pressure is non-negligible relative to the stiffness of the solid structure, the poromechanical coupling between the fluid and the solid can control both the steady state and the transient mechanics of the system. Very large pressures or very soft materials lead to large deformations of the solid skeleton, which introduce kinematic and constitutive nonlinearity that can have a non-trivial impact on these mechanics. Here, we study the transient response of a poroelastic cylinder to sudden fluid injection. We consider the impacts of kinematic and constitutive nonlinearity, both separately and in combination, and we highlight the central role of driving method in the evolution of the response. We show that the various facets of nonlinearity may either accelerate or decelerate the transient response relative to linear poroelasticity, depending on the boundary conditions and the initial geometry, and that an imposed fluid pressure leads to a much faster response than an imposed fluid flux.


2011 ◽  
Vol 26 (11) ◽  
pp. 3308-3317 ◽  
Author(s):  
J. M. Schellekens ◽  
J. L. Duarte ◽  
H. Huisman ◽  
M. A. M. Hendrix

Water ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 187 ◽  
Author(s):  
Silvia Meniconi ◽  
Bruno Brunone ◽  
Matteo Frisinghelli

2002 ◽  
Vol 49 (6) ◽  
pp. 3115-3120 ◽  
Author(s):  
A.L. Sternberg ◽  
L.W. Massengill ◽  
S. Buchner ◽  
R.L. Pease ◽  
Y. Boulghassoul ◽  
...  

2014 ◽  
Vol 37 (1) ◽  
pp. 59
Author(s):  
M. Claudia Castañeda-Saucedo ◽  
Leobigildo Córdova-Téllez ◽  
Ernesto Tapia-Campos ◽  
Adriana Delgado-Alvarado ◽  
Víctor A. González-Hernández ◽  
...  

Drought is a major constraint for common bean (Phaseolus vulgaris L.) production in México. Dehydrins are constitutive or stress-induced proteins related with a protective role of membranes and macromolecules against denaturation, thus preventing loss of their function. In this work, seed production and patterns of dehydrins accumulation in leaves and pods were evaluated in common bean cv. ‘Otomí’ subjected to drought, as compared with well-irrigated plants. Drought applied at pod formation and seed filling (SF) reduced yield up to 57 %. An antibody against a consensus sequence present in most dehydrins allowed for dehydrin identification. Two dehydrins of 82 and 73 kDA turned up both in leaves and pods throughout all the evaluated conditions. Presumably, both dehydrins are constitutive in the ‘Otomí’ cultivar. These dehydrins showed higher expression than controls in leaves after 6 d of drought at seedling and SF stages, and in pods 6 d after drought had started at SF. Increased expression might provide better protection during early stages of seedling and seed development. Increments on 63, 36 and 22 kDa dehydrin expression in pods at late SF might coincide with plant developmental programs, which prepare seed for desiccation. Dehydrins of 158, 54, 46, and 41 kDa were detected in pods 10 d after floral opening as a transient response to drought stress in SF. These results indicate dehydrins are relevant during plant development, as well as during drought stress.


1993 ◽  
Vol 164-166 ◽  
pp. 663-666 ◽  
Author(s):  
R. Brüggemann ◽  
C. Main ◽  
G.H. Bauer

Sign in / Sign up

Export Citation Format

Share Document