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Copyright of Revista de Psicoterapia is the property of Revista de Psiquiatria y Psicologia Humanista, S.L. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Cuadernos del Centro de Estudios de Diseño y Comunicación is the property of Cuadernos del Centro de Estudios de Diseno y Comunicacion and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The main objective of this research is to analyze simulation alternatives considering different scenarios in the activities of transportation, selection and classification of usable waste for the prediction, comparison, analysis and decision making in the optimization of processes, resources, materials and services through dynamic models. This will allow, in subsequent studies, to evaluate the economic viability of micro routes and their optimization to improve waste management throughout the production chain, from the source to its transformation as new products in the environment. It is important to highlight that this research is aligned with sustainable development objectives, specifically Nos. 11 and 12, related to sustainable waste management and efficient use of waste. To carry out this study, the population of interest is the recyclers who are part of the waste collection network in Sogamoso. [ABSTRACT FROM AUTHOR]

Copyright of Revista Telos is the property of Revista Telos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this work, two interpretation models of Colombian Sign Language (CSL) are presented, using static and dynamic methods that employ artificial intelligence. The CRISP-DM methodology was used as a reference, creating a database with videos from seventy non-expert participants, being preprocessed and subsequently divided into proportions of 70% - 30% for training and testing, respectively. The repository was named LSC-W70 and was used on a pre-trained model of convolutional neural networks and another in combination with LSTM networks. The results reached 67% and 76% accuracy for the static and dynamic models, respectively, where the dynamic model presents improvements in similar signs by identifying the direction of movement to define the type of sign. In this sense, a dynamic Colombian sign language interpretation tool was developed that helps close communication gaps, generating equality between people. [ABSTRACT FROM AUTHOR]

This research analyzes the impact of investment in Research and Development (R&D) and the number of researchers on the economic growth of some of the economies of the Organization for Economic Cooperation and Development (OECD), for the period 1996-2016. A causality analysis in the sense of Granger is performed and a panel data model is estimated. Data are obtained from the World Bank. There is empirical evidence of bidirectional causality between R&D and GDP per capita, but predominantly R&D Granger-causes GDP. Bidirectional causality is also found between the number of researchers and GDP per capita, but predominantly GDP Granger-causes the number of researchers. While the dynamic panel model of the MGM system in one stage shows that economic growth is positively affected by investment in R&D and the number of researchers. This work differs from others in the following aspects: 1) it considers a sample of 25 OECD countries in the period 1996-2016; 2) there is a greater availability of data, and 3) a dynamic panel data analysis is carried out that allows the use of a greater number of countries, variables and periods. [ABSTRACT FROM AUTHOR]

Copyright of Revista Nebrija de Lingüística Aplicada a la Enseñanza de Lenguas is the property of Revista Nebrija de Linguistica Aplicada a la Ensenanza de Lenguas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Investigación Económica is the property of Universidad Nacional Autonoma de Mexico, Facultad de Economia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Redes is the property of Redes-Revista Hispana para el Analisis de Redes Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Redes is the property of Redes-Revista Hispana para el Analisis de Redes Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of CULCyT: Cultura Científica y Tecnológica is the property of Cultura Cientifica y Tecnologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Psicoterapia is the property of Revista de Psiquiatria y Psicologia Humanista, S.L. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article presents two input-out models with inoperability that analyze the effects of the Covid-19 pandemic in Mexico. Both use methodological developments in which contributions were made in their specification. The first, a static model, generates a vulnerability index of the economic branches, establishing their priority for attention with economic policy instruments. The second, a dynamic model, estimates possible trajectories of economic recovery of the sectors, their possible duration, and their resilience capacities in the face of persistent phenomena of the pandemic. The models are adjusted to the shortterm indicators produced by the INEGI, reflecting a heterogeneous behavior between the sectors; some have a medium-term tendency not to return to their normal productive capacity. [ABSTRACT FROM AUTHOR]

Copyright of Investigación Económica is the property of Universidad Nacional Autonoma de Mexico, Facultad de Economia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The paper's aim is to empirically analyse the consistency of the balance of payments constrained growth model (BPCGM) in Latin America, Asia and Europe during the period from 1990 to 2019. Following McCombie's algorithm and Panel autoregressive distributed lag model (ARDL). Our main empirical results show that there exist: i) a process of external restriction in Latin America, linked to the nature of specialization patterns and the high content of foreign added value in production lines; ii) for Europe, the evidence indicates that the growth rate is not restricted by the current account, however, the slowdown in productivity and competitiveness could significantly affect this relationship; iii) estimates in Asia indicate that the rate of expansion of the product is not conditioned by the balance of payments. [ABSTRACT FROM AUTHOR]

Copyright of Redes is the property of Redes-Revista Hispana para el Analisis de Redes Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Redes is the property of Redes-Revista Hispana para el Analisis de Redes Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Estudios Económicos is the property of El Colegio de Mexico AC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Investigaciones Turisticas is the property of Investigaciones Turisticas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction: García, Rodríguez, Diaz, and Estrada (1988, p. 70) define the work team as "a highly organized social entity oriented towards the achievement of a common task" who recognize and value their "own functional roles" (Bejarano, 2019, p. 112). For Arrea (2016, p. 97), teamwork "is not an innate quality" and must be learned by applying rules. For Guerrero, Delgado. and Sánchez (2018), researchers and companies agree on the factors that promote teamwork. For their success, organizations need to base their operation on teamwork (Rojas, Jaimes and Valencia, 2018). Beal, Bohlen and Raudabaugh (1964), Shein (1973) and Hersey and Blanchard (1986) define the maturity of a team as the level of development it is in, and it is a function of combining the competencies of its members (Guerrero et al., 2018), measured using a scale to establish the degree of maturity (Guiridkian and Cassanelli, 2010). The S-curve, model functions that grow gradually at the beginning, accelerate in the middle of the period and end slowly, describes and predicts human, animal and product population growth (Aguilar et al., 2012 y Zartha et al., 2017) Method: The present study is quantitative with a descriptive cross-sectional design, which worked with an incidental sample, made up of 32 work teams from 25 manufacturing companies in the city of Chihuahua, whose central inclusion criterion was belonging to the production department. The objective of the study was to graphically develop the development process followed by the work teams, applying the logistic growth curve, with the R(t) equation (Guerrero, 2006), using the group maturity variable (Montanari and Pilatti, 2014), along with over time, relative to the 9 factors established by the Integral and Dynamic Model, applying its measurement instrument (Guerrero, 2013), its justification arises from the fact of having a graphic representation that shows the development of team maturity as a function of the time. Results: S curve was generated using the Group Maturity calculated values, by means of simple linear regression, to determine the time values, at the levels of the maturity scale. The location coefficients were determined, b = 82 and k = 0.26, and the percentages were defined for each development phase of the Integral and Dynamic Model, and their estimated times. Discussion and conclusions: The plotted curve coincides with the curve proposed by Katzenbach and Smith (1995). Using the generated S-curve, percentages were established and limits were defined for each phase of the Integral and Dynamic Model that a work team must go through, as well as the estimated times it may take in each phase. [ABSTRACT FROM AUTHOR]

Copyright of Redes is the property of Redes-Revista Hispana para el Analisis de Redes Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Redes is the property of Redes-Revista Hispana para el Analisis de Redes Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present study aims to develop a model for dynamic viscosity estimation applied to Newtonian fluids in the liquid and vapor coexistence curve of non-polar and polar substances by applying residual entropy theory. A modified Peng-Robinson equation of state is used to calculate residual entropy. One-hundred and sixteen pure substances and water (67 substances for correlation and 49 substances for prediction) are studied. The model is generalized in terms of normal boiling temperature for 12 organic families using a linear function. The temperature range varies between 104.81 K and 565.48 K and the pressure ranges between 0.01 kPa and 3618.69 kPa. The average absolute deviations for correlation and prediction are below 6.38% and 11.36%, respectively. The generalized model is validated against others developed in the literature. Based on the results obtained, it is concluded that the proposed model is simple and provides acceptable results. [ABSTRACT FROM AUTHOR]

This paper presents the design of a tuned mass damper (TMD) for vibration control of a simply supported metal beam. Considering the mechanical properties of commercial springs and magnetic dampers, and applying the finite element method, the feasibility of couple a TMD that allow to reduce vibrations in the beam was evaluated. This paper describes the beam mechanical properties, as well as the characteristics of the tuned mass damper. These results can be used in construction of dynamic models that promote the experimental study of structures. The equations proposed by Deng Hartog were used to identify adequate stiffness and damping. Finally, it was evaluated the performance of the TMD in vibration control under impact excitation conditions. With the implementation of this device, were obtained reductions of more than 90%. [ABSTRACT FROM AUTHOR]

Copyright of Gestión y Ambiente is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of EconoQuantum is the property of Universidad de Guadalajara, Centro Universitario de Ciencias Economico Administrativas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present work seeks to understand the functional relationships of the variables that most influence the development of the pandemic caused by the presence of COVID-19. To achieve the objective, we proceed to model the relationships between the groups of populations that intervene in the evolution of the pandemic to visualize the dynamic pattern that results from the interaction of the different populations in order to analyze the effect of different public policies. The work proposes a dynamic model that is then calibrated with the data from the Venezuelan case. Subsequently, scenarios are designed based on the model that allow us to elucidate some visions of the behavior of infected individuals in the future. Finally, some conclusions are proposed [ABSTRACT FROM AUTHOR]

During the last few years, piezoelectric/piezomagnetic composites have been studied due to the numerous applications related to the coupling between these materials and the fields. In the present work, two theoretical models for calculating the magneto/electric coupling factor of the composite with 2-2 connectivity, are presented. Using the asymptotic homogenization method, the effective coefficients of a periodic magneto–electro–elastic layered composite can be obtained in matrix form. By using this matrix, a two-layered composite formed by BaTiO3 and CoFe2O4 are studied, and expressions for the effective coefficients are obtained. The effective magneto/electric coupling factor as a function of the piezoelectric volumetric fraction are found from these particular coefficients. In addition, a dynamic model of the multilayer piezoelectric/piezomagnetic composite is discussed. The dynamical model has been used to determinate the magnetoelectric coupling constants. [ABSTRACT FROM AUTHOR]

Copyright of Comunicaciones en Estadística is the property of Universidad Santo Tomas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this study, a reactive distillation column for production of isopropanol was investigated. Firstly, a dynamic model was developed for the process. The model of the process was then programmed, and the process simulated using a base case obtained from the literature. Results showed that distillate contained more than 58 mol% propylene-free isopropanol. In the next step, optimization of some operating variables was performed to maximize concentration of isopropanol in distillate with condenser temperature as constraint, which was considered to be above the freezing point of water. Several simulations were performed by changing operating parameters, and finally optimum isopropanol content in distillate was obtained above 58 mol%. Results of using classic controllers showed that PID controller had the best performance for both condenser temperature set-point tracking and disturbance rejection. [ABSTRACT FROM AUTHOR]

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Signos is the property of Universidad Santo Tomas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Estudios Gerenciales is the property of Universidad ICESI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This research proposed an artificial neural network model with dynamic training in order to predict both fluids outlet temperatures on a monoethanolamine heat exchangers system, doing the training, validation and testing with 31 680 data points gathered through the passive experimentation method. The 4-3-2 multilayer perceptron achieved correlations above 98.76 %, and it was corroborated that dynamic training strategy provided more accurate results than single training. Mean absolute errors of 0.419 and 0.372 K were obtained when applying the first approach (for rich amine and lean amine outlet temperatures as output variables, respectively), as compared to 2.214 and 1.181 K when implementing the second one. Since calculated deviations have no significant implication on the technological process under analysis, proposed model is considered appropriate for simulation of the studied heat exchangers performance. [ABSTRACT FROM AUTHOR]

In order to develop strategies to maximize the utilization of wind power, it is necessary to have reliable models to simulate wind turbines' responses. Manufacturers have detailed models, though these are "black box", which makes them unusable even in new designs. Thus, so-called generic models have proliferated. Under this approach, this article presents dynamic modeling for a three-bladed rotor in a wind turbine using Euler-Lagrange formulation. For this analysis, the rotor is described as a multibody system with four degrees of freedom using simplified transformation matrices. The details of how the model was obtained and the interpretation of its three-dimensional (3D) simulation are presented using diverse conditions, which guarantees that the model's reliability can be easily verified. [ABSTRACT FROM AUTHOR]

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Dimensión Empresarial is the property of Universidad Autonoma del Caribe, Departamento del Atlantico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents an analysis of the implications it has on standard growth models assume an alternative hypothesis to the exponential growth of the population and how modeling time can alter the dynamic behavior of these models. An extension (in continuous time and discrete time) of the Mankiw- Romer-Weil growth model is also studied by departing from the standard assumption of the constant population growth rate. More concretely, this rate is assumed to be decreasing over time and a general population growth law verifying this characteristic is introduced. In this setup, the model can be represented by a three dimensional dynamical system which admits a unique solution for any initial condition. It is shown that there is a unique nontrivial equilibrium which is a global attractor. In addition, the speed of convergence to the steady state is characterized, showing that in this framework this velocity is lower than in the original model. [ABSTRACT FROM AUTHOR]

Copyright of Revista Virtual Universidad Católica del Norte is the property of Revista Virtual Universidad Catolica del Norte and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of this article was to develop a model for the dynamic management assessment of the ordinary waste of Bogota and to assess its influence in the indicators of used and properly disposed waste, which are part of the Urban Environmental Quality Index. For the construction of the model, the Systems Dynamic methodology was applied, which allowed the assessment of different management scenarios. Four scenarios were proposed: the first one represented the increase in the separation at the source; the second one showed an increase of 20 % in the recycling; the third one collected the previous two; and, finally, the fourth one looked for encouraging the separation at the source and bring to 50 % the recycling. Considering the model simulations, it is evident that it is urgent to elaborate education strategies for the population to promote the separation at the source; furthermore, it is important to improve the recycling in order to impact the landfill life and to improve the analyzed indicators. [ABSTRACT FROM AUTHOR]

This paper shows a model of a feedback system of a connector assembly line. The feedback is established as a control system, where the result of certain variables such as pending orders to be delivered, are introduced again to the model in order to improve its performance. The dynamic model was developed in the simulation platform of the VensimPle software, student version, with the system dynamics methodology. The main results are that the feedback loops established in the model allow the productive system, inventory levels and production flows of the stations to remain stable; this considering two scenarios: production capacity greater and less than demand. It was demonstrated, when the client's requirement exceeds the productive capacity, pending orders are generated, but the levels of inventories and productive flows remain stable. [ABSTRACT FROM AUTHOR]

Copyright of TE & ET: Revista Iberoamericana de Tecnología en Educación y Educación en Tecnología is the property of School of Computer Science, La Pata University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this work the kinematic and dynamic models of an industrial robot of four degrees of freedom is obtained. The kinematic model is validated through an experimental platform, a microcontroller and a high-level computer program. Based on the dynamic model, the load capacity of the manipulator are determined. The main references for the analysis of industrial robots are taken into account and a discussion of the results of several simulations is made. The models are applicable to manipulators with the same morphology in order to design mechanisms, components and controllers. [ABSTRACT FROM AUTHOR]

Copyright of Estudios Gerenciales is the property of Universidad ICESI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Vibrating screens are critical machines in the mining industry. The screen movement is mainly defined by its inclination and vibration amplitude. A proper movement allows correct operation of the screen [1-2]. Available models cannot simulate motion with high angular displacement, as a startup, shutdown and under loss of stiffness in supporting positions, because these models linearize angular displacement [3-4]. In this article a 2D 3DOF nonlinear model is proposed, presenting its development, solution and numerical simulations. Simulations deliver how much the direction of each orbit and magnitude of the natural frequency change, with respect to the supports's stiffness. This makes it possible to evaluate the state of the springs to keep the design conditions to ensure high efficiency and detect changes required of them to increase the mean operation time for replacement of the springs. [ABSTRACT FROM AUTHOR]

The characterization of the diameter distributions provides information on the structure of a stand and support in the planning of silvicultural treatments in forests with management. We estimated the parameters of location, scale and shape of the Weibull function to characterize the diameter distribution of species mixture of Pinus. We used 59 plots for model fitting (900 m2) and 100 temporary forest inventory plots for validation (1000 m2). The method of moments was better to estimate the parameters of the Weibull function as statistics used to measure the goodness of fit (lower mean absolute error, lower mean square error and fewer rejected plots with Kolmorogov-Smirnov test) compared with maximum likelihood and percentile methods. The prediction models of the parameters with stand variables represent a flexible and simple way to characterize and project the theoretical distribution of diameter classes easily and accurately. The kurtosis of the Weibull distribution has less peakedness with the projection of the number of trees in diameter classes, the shape of the curve tends to normalize and a slight positive skewness, while basal area in the form is more theoretical platykurtic distribution. The projection of the Weibull distribution can be used to determine forest management regimes or to regularize diameter structures in uneven-aged stands. [ABSTRACT FROM AUTHOR]