Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Situated cognition is an active information processing that each person builds and organizes within a social context, that is, situated cognition is the link between the educational institution and life. In this sense, to assess this relationship, during the present study three exercises are proposed 1) The students carry out a research process, a creation that culminates in the solution to a question. 2) A learning based on the approach of cases is proposed and finally learning based on real-life projects is proposed.

Mobile devices today have become a fundamental tool not only at a professional level, these mobile devices are used for various purposes, social networks, telematics, electronic commerce, mobile banking, business, among others. For this reason, the focus of attention for illegal acts such as identity theft, data theft, and others. Criminals, especially take advantage of the general public's ignorance about these issues, the ignorance and the level of implications for a company or personal level makes illegal practices an increasingly common trend. A study revealed that in Latin America 74% of companies have suffered an attack due to a mobile security problem and as a consequence the theft of information. In this sense, this article addresses relevant information, which must be taken into account to mitigate this, which has become a threat to all of us who use a mobile device.  

Meat production depends on the reproductive efficiency of the breeding herd, and high conception and weaning rates of the females, and the genetic quality of the products generated. In recent years, there has been an increase in the use of the Fixed Time Artificial Insemination (TAI) technique, such as reproduction biotechnology when applying efficiency increase, however, as average conception rates not exceeded by 50%. Several factors may influence these results: body condition, animal category, TAI protocol, racial type, coat and environmental conditions. In this sense, the objective of this study was to verify the effect of climatic and zootechnical variables on conception rates of females submitted to the TAI at the Iwar Beckmam Research Center / Hulha Negra, RS and at the UFRGS Agronomic Experimental Station in Eldorado do Sul, RS, Brazil, from 2015 to 2017. 531 females were evaluated, eight TAI protocols were applied and the following variations were included: body condition score; live weight; coat; animal category and racial type. Meteorologicals data were collected from meteorological stations installed at the experimental sites. Aiming to determine the thermal comfort ranges of the animals, the indexes: temperature and humidity index-ITH and thermal comfort index-ITU were used. The data obtained were analyzed using the JMP statistical program (v.13). Among the variables, this study was found as an effect of the applied protocol and the females’ body condition on the conceptions rates.

The Brazilian mahogany (Swietenia macrophylla King, Meliaceae) is an important forest species known worldwide for the high commercial value of its wood. Few arthropods have been observed associated with mahogany. However, this paper reports the occurrence of Hemiberlesia rapax (Comstock) (Hemiptera: Diaspididae) in S. macrophylla plants for the first time. The greedy scales did not cause apparent damage on the trunks and petioles, but the leaves turned yellowish, dried, and fall prematurely. This is the first reported occurrence of H. rapax in S. macrophylla in the world.

The study aimed to characterize the continental pisciculture of the North Coast/RS, Brazil from inquiry in environmental agencies, Emater/Ascar-RS offices and conducting a survey with 56 farmers/fish farmers of the region about some aspects of the activity, such as species farming, infrastructure, production systems, food management, water sources, water quality monitoring, effluent treatment, purpose of the activity, prevention measures and control of aquaculture activity. The results showed that the region's fish farming is developed familiarly, with the semi-intensive farming system prevailing in small areas, up to 0.5 ha, in excavated tanks, with emphasis on exotic species, mainly carp and tilapia for own consumption and sporadic sale. Regarding the environmental aspects, it was verified the need for some prevention measures and environmental regularization of the activity. It was also possible to identify "bottlenecks" that hinder the efficient development of fish farming in the region, as an environmental compliance, absence of trained technical support to fish farmers and incentives for processing and marketing of the cultivated fish. The collected data can collaborate in the future planning of public actions that aim to strengthen the activity that is still incipient in the region.

A produção de sementes é um processo que incluem diversas etapas desde o melhoramento, produção, certificação, até a manutenção depois da colheita, cuja finalidade especifica é obter sementes de qualidade, com alta pureza genética, pureza física, qualidade fisiológica e sanitária, que afetam a sua capacidade de originar plantas de alta produtividade. Objetivou-se com esta revisão abordar os principais aspectos práticos verificados durante a produção de sementes de crambe, visando obter sementes de elevada qualidade física, fisiológica, genética  e sanitária. A metodologia estudada foi a revisão de literatura com levantando e análise de dados sobre a cultura. Verificou-se que para sementes de crambe ainda não há na literatura informações suficientes quanto às diversas etapas de um sistema de produção de sementes, especialmente no que se refere ao estabelecimento e condução de campos de produção. Diante destas considerações, o conhecimento das condições ideais durante a produção de sementes é de fundamental importância, uma  vez  que  somente  aquelas  de  elevado  nível  de  qualidade proporcionam a maximização da ação dos demais insumos e fatores de produção empregados na lavoura, com respostas na produtividade das culturas.

The Fronteira Oeste region of Rio Grande do Sul State has been highlighted by the productive diversification and the development in the fruit sector. The correct nutrition of the orchards is one of the essential factors to guarantee the success of this new producing region. The objective of this study was to evaluate the nutritional status of the orange trees 'Lanelate', 'Navelina', 'Salustiana', 'Valencia', 'Midknight Valencia' and ' Valencia Delta Seedless' grafted under Poncirus trifoliata under the edaphoclimatic conditions of this region. The orchards in which the samples were taken are adult plants. It was observed that the orchards of Cacequi and Rosário do Sul generally have deficiency in N, Ca, Mn and Zn and excess of the elements: Cu and P. This indicates the need of adequacy of soil management and fertilization, in order to increase the content of organic matter, the splitting nitrogen fertilization and the improvement of Mn and Zn fertilization.

O objetivo do trabalho foi validar o método de coleta e análise da solução drenada lixiviada (Método ‘Pour Through’), coletada na drenagem do sistema, por meio da associação com os valores de pH e condutividade elétrica (CE) provenientes da solução extraída por extratores diretamente do substrato no cultivo do morangueiro, bem como verificar o efeito da adição de composto orgânico ao substrato sobre estes parâmetros. Os valores de CE e pH provenientes da solução extraída por extratores inseridos nos substratos e da solução lixiviada coletada na drenagem do sistema foram associados por meio da análise de correlação de Pearson a 1 % de probabilidade. A adição do composto orgânico ao substrato elevou a CE e o pH da solução nutritiva. A análise de correlação acusou forte relação para as leituras de CE (r2= 0,941) e pH (r2= 0,929) entre a solução drenada e a extraída diretamente do substrato. Assim, a solução drenada pelo substrato é representativa das condições da solução no meio radicular, podendo ser empregada com elevada exatidão para o monitoramento da CE e do pH no cultivo do morangueiro em substrato.