THE RELATION BETWEEN DIFFERENT PHASES OF SPRINT RUN AND SPECIFIC STRENGTH PARAMETERS OF LOWER LIMBS

The sprint is determined by the ability to accelerate, the magnitude of maximal velocity and the ability to maintain velocity against the onset of fatigue. For the sprint coach it is important to have objective information concerning, horizontal velocity, in the different phases of sprinting and the key mechanisms to these different phases. The aim of our study is to examine the relationships between the different phases of 1DDm sprinting and the results obtained with different tests, where we quantify the capability to produce force in isometric, and stretch shortening cycle (SSC) contraction modes. The inexistence of correlation between different phases of sprint, and the tests seem hard to explain. Different explanation could be given

A SINGLE CAMARA PANNING VIDEO METHOD TO OBTAIN THE BASIC CHARACTERISTICS OF SPEED RUNNING IN SPRINT RUNNING

The purposes of this study were to develop a method to achieve basic kinematics parameters in sprint competition situation suitable for normal coaching usage. 1) A simple method 10 obtain the basics characteristics of speed running -strides length and strides frequency-over an entire 100m sprint running using only one simple video camera. 2) A procedure to apply in track and field without using any placing mark on the track, but try to use the natural marks placed on tracks (50m and 60m starts, and the 100m 11 Om and 400m hurdles marks, podiums, anemometers, publicity placards, jump boxes, etc ...). The results revealed similarities between the data obtain from the photo-cells and from one panning video camera, suggesting that this method used by us to calculate the distances is valid. In addition to being used for sprint this technique can also be used to buill speed curves in hurdling races, approach running of jumps (long, triple, pole vault) and javelin throwing

Linearity Testing Against a Fuzzy Rule-based Model

In this paper, we introduce a linearity test for fuzzy rule-based models in the framework of time series modeling. To do so, we explore a family of statistical models, the regime switching autoregressive models, and the relations that link them to the fuzzy rule-based models. From these relations, we derive a Lagrange Multiplier linearity test and some properties of the maximum likelihood estimator needed for it. Finally, an empirical study of the goodness of the test is presented.fuzzy rule-based models, time series, linearity test, statistical inference

LES APPROCHES CONTEMPORAINES DE L'ÉCOLOGIE POLITIQUE ET LA QUESTION DES DYNAMIQUES SOCIO-SPATIALES

N° ISBN - 978-2-7380-1284-5International audienceIn this study, we will analyse the trajectory of the algarobe (Prosopis juliflora) as public politiques the development of Northeast semi-arid plus particularizy, the meso-gerion of Cariri Ocidental. The case study related to development beging wil a combination of ecological dynamics economical, political, cultural and technological, or ever, of dynamic referring to formulation of public politic. Concerning interactions between different social groups and instituitions, and that shaped actors and spaces. We will bad this exercise of reflection by having discussions with the specialists (authors) of political ecology in France

Combining CV and RP data: a note on the relationship between consistency and rationality

In this paper, we show that, when combining revealed (RP) and stated (SP) data, for marginal changes in quality of environmental goods, rationality implies consistency, as the consistency conditions coincide with a subset of the conditions for rationality.combined (RP and SP) individual data; rationality; data consistency

Protesting or Justifying? A Latent Class Model for Contingent Valuation with Attitudinal Data

This article develops a latent class model for estimating willingness-to-pay for public goods using simultaneously contingent valuation (CV) and attitudinal data capturing protest attitudes related to the lack of trust in public institutions providing those goods. A measure of the social cost associated with protest responses and the consequent loss in potential contributions for providing the public good is proposed. The presence of potential justification biases is further considered, that is, the possibility that for psychological reasons the response to the CV question affects the answers to the attitudinal questions. The results from our empirical application suggest that psychological factors should not be ignored in CV estimation for policy purposes, allowing for a correct identification of protest responses. JEL codes: C35, C85, Q51