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Copyright of HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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.)

Microemulsion-based drilling fluids are a new technology that aims to substitute water and oil-based drilling fluid, for featuring high lubricity, stability, low toxicity, low cost and less fluid loss. This paper studies the viscosifying action of xanthan gum and bentonite in a microemulsion-based drilling fluid, composed by an aqueous solution of glycerin, vegetable oil and a nonionic surfactant, through rheological tests. From the results, it could be concluded that the xanthan gum has a higher viscosifying action, since the drilling fluid added with a smaller amount of this biopolymer presented a higher apparent and plastic viscosity, gel strength and shear limit. The two viscosifiers attributed pseudoplasticity to the drilling fluids and the rheological model that better adjusted to the presented behaviors was the Herschel-Bulkley model. [ABSTRACT FROM AUTHOR]

This paper provides technological characterization and preliminary studies for the concentration of talc ore from the municipality of Caçapava do Sul, RS - Brazil, for the purpose of defining its process route. The characterization was made by in bench channel sampling, preparation of the material by comminution, followed by homogenization, fractionation, and analyses of particle size, mineralogy, chemical composition, brightness, density and humidity of the sampled material. Afterwards, magnetic separation studies were carried out using Davis tube and leaching, in order to reduce the impurities, which consisted mainly of iron oxide contamination. After preparation of the sample, it was possible to obtain a fine material of approximately 65 % passing 37 μm, with similar brightness values between all samples despite a variable distribution of Fe, Ca, Mg and Al contents. The best results of the study occurred for the sample with a granulometric cut of 100# subjected to a magnetic separation of 4050 G and later leaching at 80 °C for a time of 60 min. A maximum brightness of 72.3 % was achieved, with an increase in brightness of 10.3 % in relation to the initial brightness. This product could be applied to the paint, insecticide, textile and paper industries, requiring complementary characterization to fit further specifications.

Copyright of HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 purpose of this article is the answer of the question if interregional cooperation supported by economic policy of UE fosters tourism development and if yes in what way. The relation between tourism and interregional cooperation is relatively seldom analysed in comparison with other strands of territorial cooperation such as crossborder and transnational cooperation. This results from specific philosophy of interregional cooperation. In order to achieve the purpose of the paper it was necessary to present the system of interregional cooperation management and model of tourism in European Union. The paper analyses the period 2007 – 2013 when INTERREG IVC provided funding for interregional cooperation across Europe. The overall objective of the INTERREG IVC Programme was to improve the effectiveness of regional policies and instruments with special attention to the areas of support such as: • innovation and the knowledge economy, • environment and risk prevention. Tt could be assumed that it had been possible to include tourism in tourism projects implemented within Interreg IV C. To prove it the qualitative and quantitative analysis of 204 projects divided into 12 themes has been done. Aditionally the database of good practices was analyzed. The analysis of its documents allowed to identify 60 tourism-related good practices. These practices focused on cultural and sustainable tourism.

Copyright of HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 HOLOS is the property of Instituto Federal do Rio Grande do norte - IFRN 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 research aimed to identify how the experience of the clinical supervised internship contributes to the work of the educational psychologist, as well as reporting the internship experience in the postgraduate program, institutional and clinical psychopedagogy. It is important to mention that the psychopedagogy aims at the institutional and clinical context to understand how the human learning process occurs and from an efficient performance of the educational psychologist, with adequate methods, to detect and overcome the difficulties and/or blockages that are barriers in the learning development of the learners. The research is qualitative, descriptive, and bibliographic endorsed by Chamat (2004; 2008), Pimenta (2012), Porto (2009a; 2009b), Sampaio (2009), Weiss (2008), and one final paper by Gonçalves (2007). The relevance of this research was obtained from the final results, in which we could observe that it is during the supervised internship that the future professional can acquire a variety of knowledges since it is at this moment that happens the praxis, the theory-practice connection. The study also identified that the work of the educational psychologist in the internship is important to learn how to deal with children and with the difficulties diagnosed during psychopedagogical supervision. [ABSTRACT FROM AUTHOR]

The glass microspheres are abrasive materials of fine particles, commonly used in industrial activities for cleaning and polishing of metal parts. After your use, generally, are arranged in landfills of industrial waste. This paper proposes an alternative to reuse this material performing an evaluation of mechanical performance of a basalt residual soil after the addition of different glass microspheres waste contents. Initially, were carried out characterization tests of the glass microspheres and the mixtures were submitted to compaction, direct shear and California Bearing Ratio (CBR) tests. It was noted that the residue does not act in soil improvement, because, in general, the resistance of mixtures were inferior to determined for soil pure and waste pure. However, mixtures showed higher internal friction angles than pure soil, being the highest value displayed by mixing with waste content of 20%. In the ISC test, the mixture that showed better result, compared to pure waste, was with 10% glass microspheres. [ABSTRACT FROM AUTHOR]

Due an increasingly competitive market and companies seeking for free competition, a concern always present is cost reduction. This concern, nowadays, involves the environmental as well, and it is necessary to think about a reduction in the use of natural resources. Thus, structural systems must be designed so expectations such these can be satisfied, as long as they follow design criteria of building standards. The present paper aims to apply the concepts of optimization in the design of reinforced concrete beams with rectangular section. It also introduces a literature review of beam design and general concepts of optimization. Therefore, it is proposed the application of classic Newton method with exterior penalty to minimize the objective function (OF) of costs. The function is described by design criteria found in NBR 6118 (ABNT, 2014). Thus, it was verified the validation of calculation routine proposed (WJM_otimiza) and it was also verified the application of that routine in real problems. For the analysed cases, the beam cost varied between R$ 86,64 to R$ 453,24. [ABSTRACT FROM AUTHOR]

Civil Construction is responsible for consuming large amounts of the non-renewable natural resources and generating significant environmental impacts, which begin with the extraction of the raw material for construction materials manufacturing, and extend to the end of the life cycle of the buildings. In this context, the development of more sustainable building materials is necessary as a way to mitigate the environmental impacts caused and contribute to the sustainable development of the sector. This paper brings the development of concrete bricks for interlocking pavement, manufactured from the addition of PET (Polyethylene Terephthalate) waste replacing part of the natural aggregates. For this, dosage studies were carried out in order to determine the dosage for bricks manufacturing. The bricks were produced and tested in order to verify their compression strenght and water absorption. At the end, the production costs of these bricks were estimated based on the SINAP 2015 table. The results showed that the developed bricks met the technical standard requirements for their use. However, in terms of costs, these have proved to be slightly more expensive than conventional parts. [ABSTRACT FROM AUTHOR]

In this work, the oil displacement process due to water injection in a two-dimensional geometry formed by parallel plates with a micro square cavity that, in simplified form, represents the pores of the oil reservoir rock is analyzed numerically. This was achieved with the Ansys Fluent software that uses the finite volume method. The main aim of this paper is the investigation of the influence of a rounded corner of the geometry in the oil displacement process. In the multiphasic, transient, Newtonian flow, capillary forces prevailing over the inertial and viscous forces. The results obtained, for the case with square corners, coincide with the work of Coelho, Pena e Romero (2016). The analysis shows that, for the four cases considered, at the end of the oil displacement process a portion of the oil will remain trapped in the microcavity. Additionally, for the considered geometry, independent of the radius of curvature of the rounded corners, there are three distinct regions when evaluating the average oil volume fraction. A first region, where the reduction of oil is accentuated, then a second region, where the oil displacement becomes slower, and finally a third region, identified by the saturation of the residual oil. The process becomes more efficient as the radius of curvature of the micropore with rounded corners increases. This relation, at least for the cases analyzed, is linear. [ABSTRACT FROM AUTHOR]

This work is the result of a research on the influence that the occultism had on the work of the Portuguese poet Fernando Pessoa. To delimitate the study, we selected papers of Fernando Pessoa, which suggested that the poet considered himself medium, and hence influenced his work, building his depersonalization. This work presents, thus, as main objectiveto analyze personal papers of Fernando Pessoa, whose outstanding characteristic is the presence of occultism and the supposed mediumship defended by him in response to non-literary and heteronymic manifestations. To this end, I focused on specific objectives, which are: a) to study the speech of Fernando Pessoa on his supposed mediumship / occultism b) to analyze specific texts that are, for the poet, mediumistic manifestations c) to study excerpts from a set of personal letters in which Fernando Pessoa suggested being a medium. It is true that this dissertation will address many discussions already made by scholars and specialists in Fernando Pessoa, but we consider the possibility to deepen issues and contribute to the critical fortune of the poet.

Partition of Indian Sub-continent is one of the most terrible events in the history of the sub continent. The Sub-continent got freedom in 1947 along with its vivisection on the communal basis which leaves us puzzled weather the year 1947 is worthy to be remembered for the independence or for the massacre and atrocities during involuntary migration of a huge mass of people for their existence. Various writers have attempted to deal with the theme of Partition of Indian Sub-continent in their works. However, a kind of variations in the depiction of the historical events, differences in the approaches to the truth and differences in the focus and attitude of the authors are quite natural. Even the treatment of the same event or incident may differ from author to author. The present paper aims at the comparative study of Khushwant Singh’s Train to Pakistan and Bapsi Sidhwa’s Ice Candy Man. Both the writers have witnessed the event themselves and tried to depict the terror of the conflict and the suffering of people during those days in their novels. Both the writers have got worldwide recognition for their treatment of the theme of partition in their novels. The present paper discusses the similarities and dissimilarities in the treatment of the same theme.

The engineering case showed in this paper regards to a failure analysis involving a steel cable. This cable is widely used as transmission component in fitness machines also called as apolete. This simple curling galvanized steel cable, with 4.8 mm in diameter, 785,34 N/mm2 in tensile strength and produced by a Brazilian Company named Siva Industry Ltda is studied here. To determine the mechanism that caused premature failure of this element, the following failure criteria were adopted: static and dynamic tensile stress, pure bending stress besides useful life for steel cable which is based on the Niemam experimental equation. The permissible stress design related to each of these methods was calculated. The results indicated that the steel cable rupture was caused by the fatigue process due to the high number of cycles of blending which it was submitted. Added to that, the inverted movements produced a premature failure of the material. [ABSTRACT FROM AUTHOR]

An alternative to solve complex problems of optimization is using metaheuristic algorithms. Metaheuristics are approximate methods that provide acceptable solutions for optimization problems. In recent years, some metaheuristics inspired by the behavior of nature animals, especially those that live in groups, have been widely used. This paper aims present a brief study about two metaheuristics known as Firefly Algorithm and Bat Algorithm. The comparison is performed using several computational experiments to optimize benchmark functions that are classical in the literature. For this, 30 independent runs were performed. They consider different dimensions and quantity of evaluations of the fitness function. After the experiments, numeric results are presented and they show the superiority of the Firefly Algorithm compared to Bat Algorithm. [ABSTRACT FROM AUTHOR]

This paper presents the scenario of Brazilian academic production on the training of teachers inVocational and Technological Education. In September/2014, the skimming process on the data was done throughout the thesis and dissertations database of Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES),the CAPES journals section, Scielo database, the annual meetings of Associação Nacional de Pós-Graduação e Pesquisa em Educação (ANPED), and Encontros de Didática e Prática de Ensino (ENDIPE). Theperiod of time analyzed is between 2005 and 2014. The studies approachedhighlight the importance of creating moments regarding the continuing training, assuming the responsibility to support the professional development of teachers, likewise,they reinforce the necessityof epistemological and methodological basis in order to do so. [ABSTRACT FROM AUTHOR]

This paper presents the results of a systematic review of the literature on mobile learning in elementary school. It aims to present empirical evidence on the use of mobile devices that support the teaching and learning process of teachers and students of elementary school 5th to 9th grade. Thus, it sought to analyze research that deal with the pedagogical strategies of using mobile devices in school, but also in field classes. The research related to the central objective of this study admitted the scientific survey from the following sources: Bank of theses and journals of Higher Education Personnel Improvement Coordination (CAPES), and the most popular scientific literature indexers overall thematic scope: Scientific Electronic Library online SciELO and Web of Science with lists of references cited articles deemed most important by experts in their area. The results showed lack of research that addresses mobile learning and its applications in elementary school. [ABSTRACT FROM AUTHOR]

Regarding the environmental crisis, which covers not only issues related to resource depletion, greenhouse effect, pollution and the general imbalance of ecosystems, but also economic inequalities, poverty, equity and social justice. Therefore, the search for a balanced ecosystem is increasingly present in various sectors of society, in this study will address what corresponds to the perception of environmental education to assist in emerging awareness. It is considered that higher education institutions cannot, and should, remain outside the solution of environmental problems through their core functions of teaching, research and links. In this paper the perception of under graduate students from the Polytechnic University of the Évora Valley, Mexico; is addressed with regard to environmental education and the impact of it on their environment. The theoretical aspect and generalities about the perception of environmental education, was analyzed through a data collection instrument type questionnaire composed of 26 questions in Likert scale, to 115 students. The content analysis of responses to analyze the attitudes and assessment of students regarding the concepts ecology, environment and environmental relationship with science and technology. It is concluded that it is necessary to include in the curricula plan of the Polytechnic University of the Valley of Évora, from a cross-cutting approach the subject of environmental education. [ABSTRACT FROM AUTHOR]

The região agreste of the state of Rio Grande do Norte, being the largest cassava production, lacks studies on cost and profitability of this historic farming culture. Cassava is presented as an option culture, however, requiring further studies regarding its operation in the region. The present paper aimed to analyze the costs and profitability of cassava agroecosystems two families of Bom Jesus-RN, one traditional and the other alternative harvest. For this purpose, two local agroecosystems, were visited, in order to survey the technical coefficient of this culture and its profit indicators. After the analyzes, it was found that in the period rated the agroecosystem alternative was more economically sustainable than conventional. Furthermore, it was noted that cassava, in polyculture, has presented an excellent choice of culture in the familiar agricultural context. [ABSTRACT FROM AUTHOR]