-
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
Downloads:
Views:
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 practices and their implications for practical problems. Thus, we developed a survey instrument that allowed us to assess the causal relationships and correlations between conceptions, attitudes and socio-demographic factors in relation to science, using as a mediator theme the genetic engineering. Among the socio-demographic factors are included: gender, age, income, religion, schooling, consumption of information provided by the media, perception of knowledge and personal experience. For the composition of the sample, students from various undergraduate courses from public and private institutions were selected. The data were analyzed quantitatively by structural equation modeling. The results show that the conceptions that people have about science directly and positively influence their attitudes towards science. The social factors have their weight, but on a much smaller scale.
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
Downloads:
Views:
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 experiments to be realized in the job first step.
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
Downloads:
Views:
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 methodology applies the Questionnaire Benchmarking Industrial from the Institute Euvaldo Lodi of Santa Catarina (IEL / SC) using the Method for Enterprises Diagnosis (MED). Therefore, it was performed using quantitative analysis regarding the degree of companies’ maturity, applying the Grey Correlation Analysis System. Considering this research limitations and implications classify, its results are classified as exploratory. Future research may focus and study the correlation between a greater number of companies certified by ISO TS. Broad-based and larger sample size would provide a better picture for ISO TS and each organizations maturity state. This study value lies in the ability of diagnosing the organization maturity level, applying MED, Industrial Benchmarking and Grey System tools. Those allowed to define weaknesses and strengths of each organization in analysis. The study resulted in the identification of a systematic way to guide new projects and initiatives, to support and develop strategic planning and to identify how organizations are establishing world class standards.
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
Downloads:
Views:
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 condition is associated with a mass ratio of hydrogen peroxide and ferrous ions of eight, which corresponds to 47,8g H2O2 and 5,95g Fe+2.
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
Downloads:
Views:
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 substances with easier natural degradation. Technology has improved, Advanced Oxidation Processes (AOPs) for instance, being based on the generation of hydroxyl radicals as oxidant agent, seems to have great efficiency in the treatment of industrial detriments promoting the reduction of coloration in effluents and environmental decontamination. This project represents the efforts in making the effluent treatment of dairy industries using AOPs (Fenton Reagent, UV), produced by YAKULT, unit of Lorena, State of Sao Paulo viable. There have been evaluated, in the bench level, in batch process, different parameters such as time of exposition to UV radiation, pH range, temperature and different Fenton Reagent concentration. Due to these procedures, the reduction of COD was the main control variable in the results provided by the experiments, with 94.17% of organic matter degradation in the effluent.
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
Downloads:
Views:
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 minimum levels accepted by catapult. The experimenting has showed. The results of the experiment are collected connected to the desired range, they are presented in tables and interaction graphs and Pareto graph. Doing the experiments it has been showed that not all variables of the catapult initially considered affect the quality of the result of the experiment. That is, for adjusting the bands considered only one factor has a significant effect on the quality of the experiment, it can be stated that there is no need to set a specific value of the catapult, but rather a range of values within which the experiment will have good performance.
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
