Search results for "error"

How Can World Leaders Understand the Perverse Core of Terrorism?

2017

Based on the recently-dated terrorist attacks perpetrated in Europe, where terrorists weaponized classic forms of transport against civilian targets, one might speculate that likely mobilities and terrorism would be inextricably intertwined. In the mid of this mayhem, this chapter centers on the mobilities-paradigm as an ideological platform that keeps the interests of ruling elite, inasmuch as only 1% of mankind is legally authorized to travel worldwide. It is vital for social scientists to interrogate on the cultural effects of 9/11, in a world which is characterized by serious economic imbalances. In this world of full contrasts, while first world tourists are encouraged to move from one…

Example of a technique for evaluation of interferences caused by complicated sample matrix elements in ICP-AES determination

2001

An example of a useful and rapid procedure for the evaluation of interferences caused by complicated sample matrices in inductively coupled plasma atomic emission spectrometry (ICP-AES) is described. Using simple acid-base standards, all the elements investigated were determined separately in complicated matrices with satisfactory results. Multiple linear regression was used to calculate the linear correction coefficients for each matrix element analyzed. Good analytical results improved still further when this correction method was used.

Connectivity Influences on Nonlinear Dynamics in Weakly-Synchronized Networks: Insights from Rössler Systems, Electronic Chaotic Oscillators, Model a…

2019

Natural and engineered networks, such as interconnected neurons, ecological and social networks, coupled oscillators, wireless terminals and power loads, are characterized by an appreciable heterogeneity in the local connectivity around each node. For instance, in both elementary structures such as stars and complex graphs having scale-free topology, a minority of elements are linked to the rest of the network disproportionately strongly. While the effect of the arrangement of structural connections on the emergent synchronization pattern has been studied extensively, considerably less is known about its influence on the temporal dynamics unfolding within each node. Here, we present a compr…

Modelling of Adequate Costs of Utilities Services

2016

The paper propose methodology for benchmark modelling of adequate costs of utilities services, which is based on the data analysis of the factual cases (key performance indicators of utilities as the predictors). The proposed methodology was tested by modelling of Latvian water utilities with three tools: (1) a classical version of the multi-layer perceptron with error back-propagation training algorithm was sharpened up with task-specific monotony tests, (2) the fitting of the generalized additive model using the programming language R ensured the opportunity to evaluate the statistical significance and confidence bands of predictors, (3) the sequential iterative nonlinear regression proce…

Neither Passive nor Powerless: Reframing Tourism Development in a Postcolonial, Post-conflict and Post-disaster Destination Context

2021

The present chapter centres on Haitian case, which evinces not only the failure of development theory in improving the economies of pour countries but also how political instability and corruption affect competitive capabilities of tourist destinations in the periphery. In the turn of the century, the rise of different risks as terrorism, natural disasters or virus outbreaks forced the specialists and policymakers to rethink not only its policies but its marketing tactics. The post-disaster marketing as well as the post-conflict destinations emerged as valid options to revitalize tourist destinations obliterated by disasters or any other major threats. More important, policymakers acknowled…

L’armonizzazione europea nella lotta al riciclaggio: un’indagine sullo spazio riservato ai diritti e ai principi del diritto penale

2019

Basis-set extrapolation techniques for the accurate calculation of molecular equilibrium geometries using coupled-cluster theory

2006

To reduce remaining basis-set errors in the determination of molecular equilibrium geometries, a basis-set extrapolation (BSE) scheme is suggested for the forces used in geometry optimizations. The proposed BSE scheme is based on separating the Hartree-Fock and electron-correlation contributions and uses expressions obtained by straightforward differentiation of well established extrapolation formulas for energies when using basis sets from Dunning's hierarchy of correlation-consistent basis sets. Comparison with reference data obtained at the R12 coupled-cluster level [CCSD(T)-R12] demonstrates that BSE significantly accelerates the convergence to the basis-set limit, thus leading to impro…

Molecular equilibrium geometries based on coupled-cluster calculations including quadruple excitations

2005

Using analytic gradient techniques and an additivity scheme for the various electron correlation contributions, i.e. core-correlation, contribution due to full treatment of triple excitations and contributions due to quadruple excitations calculated with different basis sets, the accuracy of computed geometrical parameters are analysed in comparison with experiment. For a test set of 12 closed-shell and 5 open-shell molecules, it is found that inclusion of quadruple excitations is essential to reach agreement with experiment. The mean error of 0.002 pm and the standard deviation of 0.040 pm of the present CCSD(T)/cc-pV6Z + core(CCSD(T)/cc-pCVQZ) + T/cc-pVTZ + Q/cc-pVDZ results for the close…

Reliable TDC position determination: a comparison of different thermodynamic methods through experimental data and simulations

2008

It is known to internal combustion researcher that the correct determination of the crank position when the piston is at Top Dead Centre (TDC) is very important, since an error of 1 crank angle degree (CAD) can cause up to a 10% evaluation error on indicated mean effective pressure (IMEP) and a 25% error on the heat released by the combustion: the TDC position should be then known within a precision of 0.1 CAD. This task can be accomplished by means of a dedicated capacitive sensor, which allows a measurement within the required 0.1 degrees precision. Such a sensor has a substantial cost and its use is not really fast; a different approach can be followed using a thermodynamic method, whose…

Applying univariate vs. multivariate statistics to investigate therapeutic efficacy in (pre)clinical trials: A Monte Carlo simulation study on the ex…

2020

BackgroundSmall sample sizes combined with multiple correlated endpoints pose a major challenge in the statistical analysis of preclinical neurotrauma studies. The standard approach of applying univariate tests on individual response variables has the advantage of simplicity of interpretation, but it fails to account for the covariance/correlation in the data. In contrast, multivariate statistical techniques might more adequately capture the multi-dimensional pathophysiological pattern of neurotrauma and therefore provide increased sensitivity to detect treatment effects.ResultsWe systematically evaluated the performance of univariate ANOVA, Welch's ANOVA and linear mixed effects models ver…