Search results for "cost"
showing 10 items of 5421 documents
A short survey on nonlinear models of the classic Costas loop: rigorous derivation and limitations of the classic analysis
2015
Rigorous nonlinear analysis of the physical model of Costas loop --- a classic phase-locked loop (PLL) based circuit for carrier recovery, is a challenging task. Thus for its analysis, simplified mathematical models and numerical simulation are widely used. In this work a short survey on nonlinear models of the BPSK Costas loop, used for pre-design and post-design analysis, is presented. Their rigorous derivation and limitations of classic analysis are discussed. It is shown that the use of simplified mathematical models, and the application of non rigorous methods of analysis (e.g., simulation and linearization) may lead to wrong conclusions concerning the performance of the Costas loop ph…
SOCIAL CAPITAL AND BANK PERFORMANCE: AN INTERNATIONAL COMPARISON FOR OECD COUNTRIES
2008
Over the last few years the literature on social capital and bank efficiency analysis has expanded rapidly. We merge them by analysing how social capital affects bank efficiency in OECD countries. We use activity analysis techniques to measure efficiency, and social capital, which is related to the concept of generalized trust, is considered an environmental variable. Results suggest that the effect of social capital is more relevant for those financial institutions operating in low-social-capital environments. In these cases, inefficiencies are biased upwards, and controlling for social capital enables these banks to move up in the efficiency rankings.
Algorithms, Artificial Intelligence and Automated Decisions about Workers and the Risks of Discrimination: The Necessary Collective Governance of Dat…
2018
Big data, algorithms and artificial intelligence currently allow entrepreneurs to process information about their employees in a far more efficient manner and at a much lower cost than has been the case until now. This makes it possible to profile workers automatically and even allows technology itself to replace human resources supervisors and managers and to make decisions that have legal effects on the employees (recruitment, promotion, dismissals, etc.). This entails great risks of discrimination by the technology in command, as well as the defencelessness of the worker, who is unaware of the reasons underlying such a decision. This study analyses the guarantees established in the exist…
Labor Law and Technological Challenges
2021
Technology is changing the way in which workers are controlled. From video cameras to GPS, these technologies allow for constant monitoring of workers’ activities; however, recently two new forms of control have emerged. One consisting in giving customers a controlling role over workers’ performance and another, the “big data” (algorithms and artificial intelligence) which allow employers to process information about their employees in a far more efficient manner and at a much lower cost than has been the case until now. This makes it possible to profile workers automatically and even allows technology itself to replace human resources supervisors and managers and to make decisions that hav…
Management Accounting Chapter 5 Slides
2019
Gestión de contabilidad: sistema de coste laboral Management Accounting: Job costing system
Demanio marittimo e concessione: quali novità dalle pronunce del novembre 2021?
2021
L’articolo illustra il ruolo giocato dall’istituto concessorio all’interno della nozione giuridica di demanio marittimo. A dispetto dei principi di inalienabilità (art. 823, c. I, Cod. civ.) e di “compatibilità” tra uso concesso e pubblico uso (art. 36 Cod. nav.), le facoltà di godimento e disposizione delle pubbliche amministrazioni si sono caratterizzate, fino a tempi molto recenti, per l’assenza di limiti effettivi e di una vincolante predeterminazione dei fini. Questo assetto non è mutato allorché il legislatore ha accolto le proposte della dottrina tendenti all’introduzione di strumenti di pianificazione portuale e costiera: la generale ineffettività di tali previsioni normative, infat…
Strategies for waste recycling : the mechanical performance of concrete based on limestone and plastic waste
2022
Recycling is among the best management strategies to avoid dispersion of several types of wastes in the environment. Research in recycling strategies is gaining increased importance in view of Circular Economy principles. The exploitation of waste, or byproducts, as alternative aggregate in concrete, results in a reduction in the exploitation of scarce natural resources. On the other hand, a productive use of waste leads to a reduction in the landfilling of waste material through the transformation of waste into a resource. In this frame of reference, the paper discusses how to use concrete as a container of waste focusing on the waste produced in limestone quarries and taking the challenge…
Seismic Performance of Earthquake-Resilient RC Frames Made with HSTC Beams and Friction Damper Devices
2021
Seismic behavior of RC frames with hybrid steel-trussed concrete beams is affected by panel zone damage due to a large amount of longitudinal reinforcement. Here the seismic efficiency of innovative frames characterized by friction damper devices (FDDs) at beam-to-column connections is compared against traditional frame. Three configurations are investigated: FDDs alone; FDDs with column-to-foundation connections having preloaded threaded bars and disk springs; FDDs with self-centering friction devices. Non-linear analyses show that FDDs alone prevent plastic hinge formation at beam ends and beam–column joint damage. FDDs with self-centering friction devices effectively limit both peak and …
Some comments on the experimental behavior of FRC beams in flexure
2008
In the present paper the experimental results, recently obtained by the authors, regarding the monotonic and the cyclic flexural response of normal and high-strength concrete beams reinforced with steel bars and discontinuous fibers, are shown. From the experimental results, all referred to low values of shear-to-depth ratios, it emerges clearly that the shear failure is brittle especially under cyclic actions highlighting the role of the fibers in the flexural behavior of the beams. The cyclic action produces a significant decay in the stiffness and in the strength capacity of the beams, and the addition of fibers reduces these negative effects. Form theoretical point of view good agreemen…
A fractional-order model for aging materials: An application to concrete
2018
Abstract In this paper, the hereditariness of aging materials is modeled within the framework of fractional calculus of variable order. A relevant application is made for the long-term behavior of concrete, for which the creep function is evaluated with the aid of Model B3. The corresponding relaxation function is derived through the Volterra iterated kernels and a comparison with the numerically-obtained relaxation function of Model B3 is also reported. The proposed fractional hereditary aging model (FHAM) for concretes leads to a relaxation function that fully agrees with the well-established Model B3. Furthermore, the FHAM takes full advantage of the formalism of fractional-order calculu…