Search results for "Balance"

A link between the residual-based gradient plasticity theory and the analogous theories based on the virtual work principle

2009

A link is shown to exist between the so-called residual-based strain gradient plasticity theory and the analogous theories based on the (extended) virtual work principle (VWP). To this aim, the former theory is reformulated and cast in a residual-free form, whereby the insulation condition and the (nonlocal) Clausius–Duhem inequality, on which the theory is grounded, are substituted with equivalent residual-free ingredients, namely the energy balance condition and the residual-free form of the Clausius–Duhem inequality. The equivalence of the residual-free formulation to the original one is shown, also in their ability to cope with energetic size effects and interfacial energy ones. It emer…

A Possible Approach to Take into Account the Presence of Green Roofs in the Energy Certification of Buildings

2011

Uncertainties in The S-Sebi Model to Estimate Surface Energy Fluxes Over Natural Grasslands in Brazil

2021

Evapotranspiration (ET) is one of the main fluxes in the global water cycle. In this context, we assessed an operational methodology based on the S-SEBI model to accurately estimate energy fluxes over the natural grasslands of Pampa biome. The S-SEBI performance was investigated considering radiation data from both ERA5 reanalysis and tower flux. Comparisons from satellite-based estimates with in situ measurements were performed with and without energy balance closure (EBC). Results indicated that meteorological inputs have low sensitivity on daily ET estimates. In contrast, the instantaneous components are more affected. The impact in the daily ET is lower when in situ data without EBC are…

La reforma de la negociación colectiva en la ley 3/2012

2012

En el presente estudio se analizan las reformas en el régimen jurídico de la negociación colectiva mediante la Ley 3/2012 (precedida por el RDL 3/2012) y el RDL 20/2012, que han perjudicado y dificultado algunas de las funciones esenciales de la negociación colectiva para la evitación de vacíos de regulación, progreso en las condiciones de trabajo y freno a la individualización, y que han hecho girar el eje de la negociación hacia la empresa, solución poco realista en un marco productivo dominado por la microempresa y que otorga más poder al empleador. Las reformas han afectado sobre todo a la situación del convenio una vez finalizada su vigencia pactada (régimen de prórroga), a la estructu…

Valoración de los cambios de los aniones orgánicos que participan en el equilibrio ácido-base al introducir un regimen de biofiltración sin acetato

2011

VALORACIÓN DE LOS CAMBIOS DE LOS ANIONES ORGÁNICOS QUE PARTICIPAN EN EL EQUILIBRIO ÁCIDO-BASE AL INTRODUCIR UN REGIMEN DE BIOFILTRACIÓN SIN ACETATO. La corrección de la situación de acidosis metabólica común a la insuficiencia renal crónica es uno de los objetivos prioritarios del tratamiento de sustitución dialítico. La diálisis es capaz de producir cambios en el perfil metabólico dependientes de la modalidad y del líquido empleados. Realizamos un estudio con 22 pacientes estables en programa de hemodiálisis que se sometieron de forma cruzada a dos modalidades de hemodiafiltracion una con 34 mmol/l de bicarbonato y 3 mmol/l de acetato (HDF) y la otra biofiltración sin acetato (AFB). Según …

On approximate system dynamic

1996

In this paper concepts and techniques from system theory are used to obtain state-space (Markovian ) models of dynamic economic processes instead of the usual VARMA models. In this respect the concept of state is reviewed as are Hankel norm approximations,and balanced realizations for stochastic models. We clarify some aspects of the balancing method for state space modelling of observed time series. This method may fail to satisfy the so-called positive real condition for stochastic processes. We us a state variance factorization algorithm which does not require us to solve the algebraic Riccati equation. We relate the Aoki-Havenner method to the Arun - Kung method.

SYSTOLIC GENERATION OF k-ARY TREES

1999

The only parallel generating algorithms for k-ary trees are those of Akl and Stojmenović in 1996 and of Vajnovszki and Phillips in 1997. In the first of them, trees are represented by an inversion table and the processor model is a linear aray multicomputer. In the second, trees are represented by bitstrings and the algorithm executes on a shared memory multiprocessor. In this paper we give a parallel generating algorithm for k-ary trees represented by generalized P–sequences for execution on a linear array multicomputer.

Hidden oscillations in nonlinear control systems

2011

Abstract The method of harmonic linearization, numerical methods, and the applied bifurcation theory together discover new opportunities for analysis of hidden oscillations of control systems. In the present paper new analytical-numerical algorithm for hidden oscillation localization is discussed. Counterexamples construction to Aizerman's conjecture and Kalman's conjecture on absolute stability of control systems are considered.

Support and Emotional Well-Being of Asylum Seekers and Refugees in Spain

2020

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Plantar pressure and EMG activity of simulated and actual ski jumping take-off

2001

Plantar pressures and activation of the four muscles (VL - vastus lateralis, GL - gluteus, TA - tibialis anterior and GA - lat. gastrocnemius) were measured from ten ski jumpers under simulated laboratory conditions with training shoes (Lab TS) and with jumping boots (Lab JB) as well as in actual hill jumping conditions (Hill). The most significant differences between measured conditions were found in muscle activation patterns and plantar pressures prior to take-off. The centrifugal force due to the curvature of the inrun under actual hill jumping conditions caused extra pressure under the fore and rear parts of the feet (P<0.001) and therefore higher activation in all muscles (P<0.001 for…