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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.)

The use of tailings generated during the iron ore beneficiation process has been the subject of several studies aimed at finding economically viable solutions for managing the waste generated by the mining industry. In this context, this study was developed with the purpose of characterizing foundry sands manufactured from the waste material originating from the Andrade Mine in Minas Gerais, Brazil, with the aim of assessing the feasibility of using these sands as molding material for the casting process. Initially, the overall tailing sample underwent size classification to 150 µm, and the retained fraction was separated into two foundry sand samples, named Sand 01 (without additional treatment) and Sand 02 (subjected to magnetic separation). Studies were conducted on the chemical, physical, optical, and mineralogical characteristics of both the overall sample and the obtained sands. The results indicated that both sand samples were classified as medium sands based on the fineness modulus, an essential characteristic of materials used for casting molds. Sand 02, in particular, demonstrated characteristics closer to the standards recommended by the CEMP E-01 standard of ABIFA, highlighting the possibility of using this material as a coproduct of iron ore beneficiation. [ABSTRACT FROM AUTHOR]

This work is an excerpt from a research at master's level, and aims to analyze the ways of thinking about the concepts of entropy and spontaneity that emerge in the responses of undergraduate students to three problemsituations, part of a didactic sequence for discussing these concepts, from the perspective of the Theory of Conceptual Profiles. These problem-situations were developed considering contexts in which different areas of the conceptual profile have pragmatic value. The analysis of responses was carried out according to Lemke's thematic patterns, which establish semantic relations according to discursive interactions. The results point to the emergence of two zones of the conceptual profile of entropy and spontaneity, perceptual/intuitive and empirical, however, it was not always possible to identify a way of thinking about these concepts, as students avoided using the concept of entropy, seeking to use other concepts studied in school. [ABSTRACT FROM AUTHOR]

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 implementation of the Paragonorte Settlement caused environmental degradation due to deforestation, in order to reverse this situation, it is necessary to adapt it to the Forest Code established by Law 12.651 / 2012. One of the instruments created by this law is the Rural Environmental Registry (CAR), whose purpose is to integrate environmental information. In this context, geotechnologies allow the generation of cartographic products to support the elaboration of the CAR, such as the land use and occupation map. This work aimed to generate maps of land use, with the perspective of subsidizing environmental planning, in the Paragonorte Settlement Project in the municipality of Paragominas-PA. To prepare this map, digital processing techniques were applied to CBERS-4 satellite images and supervised classification. In validating the generated map, it was found that the Kappa index is 0.8990. The classes of use and occupation identified were: exposed soil, water, urban area, pasture, dirty pasture, regeneration, forest and secondary forest. Of the verified classes, the predominant ones are forest and secondary forest that together represent 49.64% of the coverage, while the land use classes that are quite representative are those destined to pastures, which correspond to 23.01% of the coverage. The information from the map generated in this work can be used in the preparation of the CAR and to support the implementation of public policies aimed at environmental planning. [ABSTRACT FROM AUTHOR]

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.)

These articles contain an analysis of the use of concept maps in education (with an emphasis on physical education) and a proposal to use it as a qualitative assessment tool. Through a literature review of research, information that revealed valuable tool that the conceptual maps for education were obtained. The conceptual map is a graphical methodological strategy which aims to organize, represent and create knowledge through relationships between concepts, creating propositions. This tool is based on Ausubel's assimilation theory and therefore has a hierarchical structure, its preparation and reading require less cognitive effort in relation to written texts. For this reason, the conceptual maps are great tools for qualitative evaluation. [ABSTRACT FROM AUTHOR]

The mineralogical characterization of the Brazilian minerals variety occurrence is one of the key steps in the design of the mineral processing route and improving the overall process efficiency. This set of information is essential in assessing the technical and economic viability of a mineral Project. Among the variety mineralogical characterization techniques, automated analyzers are gaining great prominence because they provide qualitative and quantitative data in an automated manner, with great speed and accuracy. The system, available in the NanoLab at the Laboratory of the Mining-Metallurgic Centre/REDEMAT and specifically called TIMA-MIRA, is composed of a scan control program and analysis of mineral data (TIMA -Tescan Integrated Mineral Analyzer) and a scanning electron microscope with cannon field emission of electrons associated with two energy dispersive detector characteristic X-rays (MIRA -trade name). The system uses a mineral database consisting of association images by back scattered electrons of the mineral grains, with their characteristic X-ray spectra and their comparison with the characteristic spectra of a database. The equipment has an interface that allows you to add minerals and other materials to their underlying database, which is critical to the result accuracy because the original equipment database that is created only with data of mineral samples from other countries would not identify minerals of national origin with its characteristic major and minor elements. These limitations of the database integrated mineral analyzer TIMA-MIRA motivated the construction of a new database through a selection methodology, preparation and analysis by diffraction rays and the TIMA-MIRA system, different context samples Brazilian geological. Each mineral was determined to be analyzed in the integrated mineral analysis system by the XR diffraction analysis. Thereby, we obtained the maximum and minimum intensities values of chemical elements peaks that make up the analyzed mineral obtaining thus new identification rules for each selected species and adapted some existing rules to meet the needs presente. [ABSTRACT FROM AUTHOR]

This work reports the identification of some classes of compounds present in the ethanolic and hexane extracts of Bixa orellana (Urucum). For the phytochemical tests carried out, the extracts were obtained from different parts of the plant (leaves, seeds and stem) which were dried and subjected to the cold extraction process separately with the solvents hexane and ethanol. Thus, the ethanolic and hexane extracts of the species were obtained. The classes of compounds investigated were phenols, tannins, anthocyanins, anthocyanidins, flavonoids, leucoantocyanidins, catechins, flavanones, saponins, anthraquinones, alkaloids, triterpenoids and steroids. The tests showed positive results for some extracts, which revealed the presence of flavanones, flavonols, xanthones, saponins, flavonoids, free anthraquinones, alkaloids, triterpenoids and steroids. We conclude that the results found in the study confirm the data presented in the researched literature. [ABSTRACT FROM AUTHOR]

In this article, we outline the historical course of Secondary Education and Professional Education in Brazil. It was sought to know how the Secondary Education and Professional Education were institutionalized in Brazil from the following question: How have the Secondary Education and Vocational Education have been constituted throughout the history of Brazilian education? In order to respond to the questioning, a qualitative research was carried out in which a historical approach was taken, starting with documentary and bibliographical analysis. It was also considered aspects related to Professional Education in their socio-cultural and economic interactions and influences, such as: the relation work, education and society and the social division of labor. Based on what was researched, it was noticed, with emphasis on the trajectory of Professional Education and High School, changes that were carried out within a diversified historical process that accompanies a set of social, economic, political and educational aspects in national and international scope In a globalized world. In view of what was discussed throughout the text, professional education is defended in an integrated way to Basic Education. A type of education that allows the integration of scientific education, produced and accumulated historically, with vocational training. That way, who knows? There is an education that interests the working class; A training that is not only technical, but which guarantees an integral human formation. To that end, it becomes inevitable for educational policies and reforms, but for them to try to overcome the barriers that prevent culturally integrated scientific and technological education from the historical moment of the twenty-first century. [ABSTRACT FROM AUTHOR]

The research object of this text is focused social policy, in particular, seeks to demonstrate that targeted social policies are not only residual imprint can still be allied to universalizing policies, which make redistributive. This objective becomes healthy at the time that the targeted social policies are crucified as just waste. [ABSTRACT FROM AUTHOR]

The existence of fire hydrants in cities is of paramount importance in fighting, mainly to ensure water supply in vehicle stank sused by the fire department. In this sense, the present study a imed to analyse the distribution of such equipment in the south, east and West administrative areas of the city of Natal, Rio Grande do Norte (RN). In the first stage, the equipment was located through the Street View tool Google Earth software. The geographical coordinates were obtained through the Earth view mode and then, conferred in place through satellite navigation device (GPS - Global Positioning System). They were located and recorded 110 hydrants in the three regions. These records, using ArcGIS 9.3 software, was generated a vector file points and through ortofotocartas in scale 1:2000, the geographical location of each piece of equipment was adjusted and converted to projection Universal Transverse Mercator in SAD69 Datum and Zone 25 South. As spatial distribution analysis method, we used the kernel density estimator. The result observed was a geometrically irregular distribution of hydrants in the three administrative areas analysed, with some areas with great concentration and others with total lack of equipment. Thus, the use of this integrated tool to Geographic Information System - GIS proved to beuseful for the spatial location of hydrant sand to guide planning for the installation of new equipment in unmet areas, since it is essential equipment for human security and protect public and private property during fire fighting. [ABSTRACT FROM AUTHOR]

The variables applied in microflotação may present different degrees of influence on the results obtained with the experiments. In order to increase understanding about his influence statistical studies can lead to more accurate data. In this way, the objectives of this study related to (i) understand the significance of the variables pH, gas flow and time of flotation have on the microflotation (with experiments conducted in duplicates); (ii) assess whether there is a strong correlation between these variables and (iii) study on particle size tracks, within the applied in the study, particles suffer greater hydrodynamic drag (for the experimental conditions). The experimental parameters, whose definition included data from literature review of published studies, were: mineral - pure quartz; surfactant (collector) - dodecilamine; equipment - Hallimond tube with medium extender - 10 cm (250 mL volume); mass of essays - 3.00 (± 0.05) g; reagent concentration - 10-3 mol.L-1; conditioning time - 20 s; volume of conditioning - 250 mL; particle size range - 53 µm to 212 µm. The analyses of Yates method and reverse Yates method have been applied to the study of the data obtained. As a result it was obtained that the variable pH and pH variable interactions with the variable gas flow are the most significant (≥ 95.0 % of reliability). It was noted also that the hydrodynamic drag was greater for the grain sizes close to 74 µm [ABSTRACT FROM AUTHOR]

In the oil industry the problem of scale formation causes a lot of damage, among which we can mention the reduction in production of liquid and consequently oil production, there is also the increased costs to the oil production. The study of the scale is extremely important to the understanding of the formation mechanism and the choice of prevention and removal method of the scales. Techniques such as, Soxhlet extraction, XRF, SEM and XRD were used to characterize the samples. Analyzing the results were identified: ferruginous scale, which its formation is associated with the presence of corrosive agents; and carbonate scale, your formation is influenced by the concentration of calcium ions and bicarbonate ions dissolved in the water, this type of formation is common in wells that have a high concentration of these ions, which is also favored by relief pressure and increased temperature in the reservoir. [ABSTRACT FROM AUTHOR]

This text, based on documental analysis and bibliographical research, discusses the relations between the National Plan of Education (PNE) approved by the law 13.005, in 2014, and the new Directives for initial and continuous formation of Basic Education Teachers, Resolution 02, in 2015. Also, it discusses on impacts of the educational policies about the construction/fabrication of the professional identity of Vocational and Technological Education Teachers (EPT). The discussions allow us to conclude that the approval of such directives contribute on the achievement of PNE Aim 15 (Meta 15 do PNE). It deals with the implementation of a Teachers' Formation National Policy and the Strategy 15.9 - deals about the implementaiton of special courses and programmes for the teachers' formation - teachers that do not possess a specific graduation for teaching. However, these changes do not surpass the historical perspective of temporary and urgent policies for Professional Education Teachers' Formation, but they show some advances about academic working hours and the conceptions supporting them. The analysis of the data verified that there is no permanent or continuous policies for teachers in Professional Education. This lack of policies originated 63,25% of Vocational Integrated Professional Education Teachers without a legal formation for teaching. It caused impacts on the development of the construction/fabrication of a professional identity that, within the context, matches the national project for development committed with the interests of the productive capitalist system. [ABSTRACT FROM AUTHOR]

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 objective of this research is to investigate the senses of celebritization of Neymar present in a report of Sports Spectacular program and discourse of the college young. Was used the technique of focus groups and analyticaldescriptive method for collecting and analyzing data, respectively. The study sample consisted of 24 college students aged between 18 and 24 years. The report focused on the exaltation and valuation of Neymar image and in his creation as an idol. Young, proving that the receiver processes the messages your way, did not adopt the senses proposed by EE. [ABSTRACT FROM AUTHOR]

The creation and expansion of Federal Education, Science and Technology in Brazil, arises in a context of growing demand for energy worldwide and growing problem regarding the treatment of solid waste. In this context anaerobic digestion plays a major role, then, is a technology capable of turning animal waste into biogas, a source of clean, renewable energy that uses as raw material, a material considered often bothers that are waste. Thus this study aimed to build a digester Indian model at the Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte, campus Apodi (IFRN) in order to generate a real concrete learning environment and allows integrating various disciplines, as well as disseminating technology to farmers that enables the processing of waste generated. The biodigester constructed is 2.20 to 1.90 m depth in diameter, with a useful capacity of about 5,000 liters of the biomass and water mixture and a hood constructed from high density polyethylene, which is for storage of the biogas produced. Depending on the biomass used this equipment is capable of producing up to 1216m3 (cattle manure), 809m3 (goat manure), 1140m3 (manure) per year, this production, that energy equivalent to 669, 445 and 627 liters of diesel oil. These data show that the technology of the digesters use besides providing waste treatment enables the production of biofuels, features that make this technology applicable in the areas of teaching, research and extension. [ABSTRACT FROM AUTHOR]

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.)

In Brazil citizens between 15 and 29 years old are regarded as young people. They have rights and duties; their identity and autonomy must be respected. In Brazilian society, most young people from lower classes already take over responsibilities linked to the provision of their own homes. Therefore, many young people do not complete Basic Education, or are denied the possibility of entering higher education. Consequently, they should be offered conditions and opportunities of access to Professional Education articulated to Basic Education. Thus, the article discusses Professional Education for young people in Brazil, with emphasis in education policies linked to Basic Education developed in the first decade of the 21st century. The following procedures were conducted: a documentary research involving the main documents guiding the policies and programs related to Professional Education; a bibliographic research, mainly based on Oliveira (2012), Moura (2012), Venturi and Abramo (2000), Frigotto, Ciavatta and Ramos (2005); and a survey on the enrollments of young people in Professional Education, in the School Censuses from 2000 to 2010, available on the website of the Instituto Nacional de Estudos e Pesquisas Educacionais Anísio Teixeira (The National Institute for Educational Studies and Research Anísio Teixeira, INEP). The Professional Education programs articulated to Basic Education found in the period under study are public policies for education, work and qualification for young Brazilians, specifically to the ones who are in situation of socioeconomic vulnerability. [ABSTRACT FROM AUTHOR]

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.)