American Journal of Theoretical and Applied Statistics

Volume 3, Issue 6, December 2014

  • Public Perception of Science: Mapping the Concepts of Brazilian Undergraduate Students of the State of Sao Paulo through Structural Equation Modeling

    Fernanda de Oliveira Simon, Estéfano Vizconde Veraszto, José Tarcísio Franco de Camargo, Dirceu da Silva, Leandro Valim de Freitas, Nonato Assis de Miranda

    Issue: Volume 3, Issue 6-1, December 2014
    Pages: 1-18
    Received: 12 November 2014
    Accepted: 2 December 2014
    Published: 27 December 2014
    DOI: 10.11648/j.ajtas.s.2014030601.11
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    This article belongs to the Special Issue Statistical Engineering
    Abstract: Once modern society depends in large-scale of scientific development, the degree of association between scientific knowledge and attitudes toward science has historical, social and political implications. In this sense, it becomes crucial to analyze the public attitudes regarding to science as these are related to the changing context of scientific... Show More
  • Taguchi Orthogonal Array Combined with Monte Carlo Simulation in the Optimization of Wastewater Treatment

    Ana Paula Barbosa Rodrigues de Freitas, Leandro Valim de Freitas, Carla Cristina Almeida Loures, Aneirson Francisco da Silva, Lúcio Gualiato Gonçalves, Messias Borges Silva

    Issue: Volume 3, Issue 6-1, December 2014
    Pages: 19-22
    Received: 17 November 2014
    Accepted: 19 November 2014
    Published: 27 December 2014
    DOI: 10.11648/j.ajtas.s.2014030601.12
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    This article belongs to the Special Issue Statistical Engineering
    Abstract: In this work was performed a Monte Carlo Simulation for a mathematics model to experimental planning of Taguchi. The software has enabled an upgrading of the variables planning value of 54,26% of TOC, 53,28% of DQO and 6,58% of Total Phenols, that feature the importance of the method for the experimental optimizations, and thereafter reduction of e... Show More
  • Defining Quality and Maturity Level Applying the Grey System and the Method for Automotive Enterprises Diagnosis

    Robisom Damasceno Calado, Messias Borges Silva, Angela Alice Silva Boa Sorte Oliveira, Gabriela Salim Spagnol, Alice Sarantopoulos, Li Min Li

    Issue: Volume 3, Issue 6-1, December 2014
    Pages: 23-34
    Received: 30 November 2014
    Accepted: 11 December 2014
    Published: 27 December 2014
    DOI: 10.11648/j.ajtas.s.2014030601.13
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    This article belongs to the Special Issue Statistical Engineering
    Abstract: This study intends to diagnose the maturity level of companies certified by the Automotive Quality Management System ISO TS 16949: 2009. Thus, it analyzes if those are considered World Class Organizations (WCO), identifying its management strengths and weaknesses, to provide input for improvement opportunities in their systems. This study methodolo... Show More
  • Response Surface Method and Taguchi Orthogonal Array Applied to Phenolic Wastewater by Advanced Oxidation Process (AOP)

    Ana Paula Barbosa Rodrigues de Freitas, Leandro Valim de Freitas, Carla Cristina Almeida Loures, Lúcio Gualiato Gonçalves, Messias Borges Silva

    Issue: Volume 3, Issue 6-1, December 2014
    Pages: 35-41
    Received: 19 November 2014
    Accepted: 21 November 2014
    Published: 31 December 2014
    DOI: 10.11648/j.ajtas.s.2014030601.14
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    This article belongs to the Special Issue Statistical Engineering
    Abstract: The advanced oxidation process was conducted using the Design of Experiments in this work. Initially, Taguchi’s Orthogonal Array L16 (Photo-Fenton and Ozone) was applied, with which it was obtained 29.07% TOC removal. Then, the process was optimized with the Photo-Fenton RSM, thus it was achieved the highest percentage of TOC removal= 54.68%. This ... Show More
  • The Use of Advanced Oxidation Processes (AOPs) in Dairy Effluent Treatment

    Carla Cristina Almeida Loures, Gisella Rossana Lamas Samanamud, Ana Paula Barbosa Rodrigues de Freitas, Ivy S. Oliveira, Leandro Valim de Freitas, Carlos Roberto de Oliveira Almeida

    Issue: Volume 3, Issue 6-1, December 2014
    Pages: 42-46
    Received: 17 November 2014
    Accepted: 19 November 2014
    Published: 10 January 2015
    DOI: 10.11648/j.ajtas.s.2014030601.15
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    This article belongs to the Special Issue Statistical Engineering
    Abstract: There are several studies in this same sense aiming to develop new processes and new technologies to minimize the volume and toxicity of effluents generated by chemical industries. Currently, technology advances in effluent and residues treatment is based on environmental sustainability (residual reuse) and in the degradation of pollutant substance... Show More
  • Didactic Tool Applied into Data Collection and Variability Study in a Process

    Thiago De Camargo Leite Labastie, Carlos Alberto Chaves, Antonio Faria Neto, Wendell De Queiroz Lamas, Luiz Fernando Fiorio, Helena Barros Fiorio

    Issue: Volume 3, Issue 6-1, December 2014
    Pages: 47-57
    Received: 1 October 2014
    Accepted: 5 November 2014
    Published: 8 February 2015
    DOI: 10.11648/j.ajtas.s.2014030601.16
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    This article belongs to the Special Issue Statistical Engineering
    Abstract: The objective of this paper is to present an application of design of experiments in which students learn how to get real data with application to a case using the catapult, and generate their statistical analysis through software, in order to have a great reliability, at the work development. The variation factors are selected between maximum and ... Show More