Search results for "Method"
showing 10 items of 13253 documents
Numerical decomposition of geometric constraints
2005
Geometric constraint solving is a key issue in CAD/CAM. Since Owen's seminal paper, solvers typically use graph based decomposition methods. However, these methods become difficult to implement in 3D and are misled by geometric theorems. We extend the Numerical Probabilistic Method (NPM), well known in rigidity theory, to more general kinds of constraints and show that NPM can also decompose a system into rigid subsystems. Classical NPM studies the structure of the Jacobian at a random (or generic) configuration. The variant we are proposing does not consider a random configuration, but a configuration similar to the unknown one. Similar means the configuration fulfills the same set of inci…
Flexible Estimation of Heteroskedastic Stochastic Frontier Models via Two-step Iterative Nonlinear Least Squares
2019
Despite its importance, the monotonicity condition is typically overlooked in stochastic frontier analysis. This article illustrates a straightforward and useful method for the estimation of semiparametric stochastic frontier models imposing such constraint and incorporating exogenous inefficiency effects exploiting the scaling property. An iterative estimation algorithm based on nonlinear least squares is developed and the behavior of the proposed procedure is investigated through a set of Monte Carlo experiments comparing its finite sample properties with those of available alternatives. The simulation results highlight very good performance of the new algorithm which outperforms the comp…
Editorial message
2006
Geometric Computing and Reasoning (GCR) is a new track of SAC and it is dedicated to the recent trends in the domain of geometric constraint solving and automated, or computer aided, deduction in geometry.
The initial training of physical education teachers—In search of the lost meaning of professionalism
2006
This article re-examines the initial training of physical education teachers with the purpose of pinning down its professional significance. The author maintains that we have lost, in part, its meaning, and, in an attempt to recover it, offers two initial strategies: to revisit two basic concepts—education in general and physical education in particular—and to reformulate four key questions: Question 1. What being a physically educated person means… Professionals are urged to establish the objectives of physical education based on the deficiencies, necessities and interests of the children and young people, which are rooted in the nature of the developed societies in which they live (e.g. t…
Raising environmental awareness through education
2016
This paper presents a method for involving learners in awareness-raising and real changes in consumption. The described method is a teaching assignment comprising a self-audit of household chemicals' consumption, system thinking to find the main causes and consequences, finding solutions and taking action. Findings about students' household chemicals consumption patterns and their reactions one month and six months after the assignment are presented and analysed. We found that the students' households use considerable amounts of chemicals and in most cases do not pay attention to their health and environmental impacts when making purchasing decisions. When doing this, students were able to …
Piero Sraffa on utility and the 'subjective method' in the 1920s: A tentative appraisal of Sraffa's unpublished manuscripts
2001
The paper reconstructs Sraffa's assessment of utility-based and individualistic explanations of demand in Marshallian economics in the light of some fresh evidence provided by Sraffa's unpublished manuscripts of the 1920s. It is shown that Sraffa criticised the standard Marshallian explanation of individual consumption choices, emphasised the independent measurement requirement in explanation, lacked enthusiasm for the heuristic potentialities of the 'subjective method' in economic theorising and strove for an analysis of the phenomena of interdependence in the sphere of production as well as in the sphere of consumption.
Electricity Consumption Analysis of Tertiary Buildings: An Empirical Approach for Two University Campuses
2020
An empirical approach for the analysis of energy consumption of existing buildings of the tertiary sector is presented in this study. It allowed the organization and management of large amounts of data according to different timeframes and helped to focus on leading issues about energy uses, and dealt with compatibility with tariff structure. The analysis method, which implied a powerful graphical representation of the results, allowed us to detect critical issues in electricity energy management for public buildings and improve their energy performance. Furthermore, the authors proposed a set of electricity consumption indexes (ECIs) that gave useful insight into the main hotspots. The bas…
mplicit Identification of Contact Parameters in a Continuous Chain Model
2011
Accurate contact modeling is of great importance in the field of dynamic chain simulations. In this paper emphasis is on contact dynamics for a time-domain simulation model of large chains guided in a closed loop track. The chain model is based on theory for unconstrained rigid multibody dynamics where contact within the chain and with the track is defined through continuous point contacts using the contact indentation and rate as means. This paper presents an implicit method to determine contact parameters of the chain model through the use of none gradient optimization methods. The set of model parameters are estimated by minimizing the residual between simulated and measured results. The…
Delving Into the Body Fears’. Teacher Training in Art Education Attending to the Work of Women Artists
2018
Planteamos el uso del arte contemporáneo en la formación de docentes. Consideramos de gran interés acercar los actuales dispositivos del arte a las futuras generaciones de maestros y maestras, ya que en el mundo del arte se están tratando temáticas sociales y culturales que van a resultar decisivas en la labor que deberán llevar a cabo quienes eduquen. Desde una perspectiva regeneradora y vitalista, proponemos una posibilidad de estrategias en la formación artística del colectivo docente. Integramos temáticas que habitualmente no se tratan en el ámbito escolar, pero que están vinculadas a las emociones, a las necesidades y a la vida cotidiana del alumnado. Conceptos como «el miedo» o «el cu…
Contemporary Art as a Learning Experience
2012
Abstract Art has changed a lot during the last fifty years. In spite of that, the role of art in schools has remained the same. The aim of this paper is to show the many different ways contemporary art offers itself as an environment for learning. An idea of contemporary art as a learning experience presented here is based on teacher's views on the matter. The analysis of the material shows that by concretizing the properties of artworks and the experience produced by them, arguments for seeing contemporary art both as a credible and a necessary environment of learning can be found.