ORIENTATION: Understanding the components for an academic career management intervention programme, to enable the development of the required academic pipeline to achieve the strategic objectives of higher education institutions RESEARCH PURPOSE: A consensus view across subject experts for a career management intervention programme to enable the progression of academic careers MOTIVATION FOR THE STUDY: While academic career literature captures an array of normative designs of career management programmes to cultivate the required academic talent consortium, literature indicates a lack of a comprehensive and systematic approach for career management to provide a framework for successfully managing academic careers. RESEARCH DESIGN, APPROACH AND METHOD: A modified Delphi technique was employed, by presenting an expert panel with the findings of a broader research project to initiate the consensus-seeking methodology - a systematic approach to obtain concordance on the experts' opinions through two rounds of structured questionnaires. MAIN FINDINGS: The identified components are structured and presented in five main themes (categories), including: (1) institutional, (2) individual, (3) overlapping, (4) cultural and (5) external. The results show a strong agreement among the experts on the first four categories. The fifth (external) offers the lowest level of agreement, reminding that the higher education system is part of a broader contextual system; it should be understood within its operational context and time PRACTICAL/MANAGERIAL IMPLICATIONS: Offering talent management practitioners and higher education leaders expert observations of the factors to consider while planning and implementing career management intervention programmes to enable academic career progression. CONTRIBUTION/VALUE-ADD: A comprehensive and systematic approach for career management, providing a framework for successfully managing academic careers across the various career stages.

Abstract The Early Cretaceous volcanic Jaguarão Formation formed duringthe early stages of Gondwana breakup. These felsic rocks characteristically enclose numerous crustal xenoliths. Fieldwork, petrographic studies, and laser ablation multicollector ion coupled plasma mass spectrometer (LA-ICP-MS) U-Pb analyses were carried out to evaluate the xenoliths of the Jaguarão Formation. A base-to-top distribution of xenoliths in the different flows of the volcanic pile indicates that earlier flows incorporated centimeter-sized fragments of local underlying gneiss, granite, and quartz veins, with limited assimilation. In the middle part of the volcanic pile, the size of the xenoliths is smaller and assimilation textures are more frequent. At this same level, reequilibrated orthopyroxene and plagioclase antecrysts were recognized, suggesting fractionation coeval with assimilation in a lower magmatic chamber prior to extrusion. At the top, no visible xenoliths occur. U-Pb ages of the zircon xenocrysts served as a proxy for assessing the crust underlying the volcanic rocks. Most of the ages obtained are similar to the ages of the Eastern Dom Feliciano Belt cropping out nearby, ranging from 680 to 620 Ma, with a subordinate group ranging from 580 to 570 Ma, suggesting a shallow crust contribution. The presence of few Paleoproterozoic and Mesoproterozoic (1.0-1.2 Ma) zircons, however, suggeststhat the underlying terrain may be more complex..

Abstract The Cr-rich Jacurici Complex is located at the limit between the Serrinha Block and the Salvador-Curaçá Belt, Northeastern São Francisco Craton. In order to better understand the age span of magmatism and tectonism, we have studied a basement high-grade charnockite orthogneiss, a metanorite of the Complex and a crosscuting undeformed quartz-feldspar pegmatite. For the orthogneiss, SHRIMP U-Pb ages of zircon cores and overgrowth rims yielded, 2966 ± 9 Ma for crystallization and 2091 ± 10 Ma for metamorphism, respectively. Zircons from the metanorite show internal textures consistent with high grade metamorphism. The U-Pb LA-ICP-MS age determination provided a 2099 ± 6 Ma metamorphic age for the Jacurici Complex, indicating it was already emplaced during amalgamation around 2.1 Ga. Zircons from the undeformed quartz-feldspar pegmatite provided a LA-ICP-MS U-Pb age of 2083 ± 11Ma, marking the end of the N-S transcurrence. The magmatic Jacurici Complex age remains undefined, but is equal to, or older than, 2.1 Ga. Therefore, possible correlations with other mafic-ultramafic intrusions, such as the Cu-rich Caraíba Complex, should be reassessed. Our results indicate that the N-S transcurrence ended earlier in the Jacurici Complex region than in the northwestern area of the Salvador-Curaçá belt.

BACKGROUND: Community health workers (CHWs) are change agents expected to assist in decreasing the global burden of disease in the communities they serve. However, they themselves have health risk behaviours, which predispose them to non-communicable diseases and thus need to be empowered to make better health choices. There is a gap in literature detailing the challenges faced by CHWs in addressing their own health risk behavioursAIM: This study aimed to explore the challenges experienced by CHWs in carrying out their daily duties and the motivating factors to join a self-management programmeSETTING: The study was conducted in a low socio-economic urban area of the Western Cape, South AfricaMETHODS: This study used a qualitative exploratory design using in-depth interviews to obtain rich data about the personal and professional challenges that CHWs experience on a daily basisRESULTS: Five themes emerged with regard to professional challenges (social conditions, mental health of patients, work environment, patient adherence and communication). This cadre identified ineffective self-management as a personal challenge and two themes emerged as motivation for participating in a self-management programme: empowerment and widening perspectiveCONCLUSION: The challenges raised by the CHWs have a direct impact on their role in communities. This study therefore highlights an urgent need for policymakers and leaders who plan training programmes to take intentional strategic action to address their health challenges and to consider utilising a self-management intervention model to improve their overall health status

BACKGROUND: Despite being identified as a solution to the challenges related to healthcare service delivery, the incorporation of interprofessional practice (IPP) into clinical practice has been limited. To implement an interprofessional model of healthcare, successfully, health professionals need to have an understanding of IPP and its related contentAIM: The aim of this study was to explore and describe the health professionals' perceptions, attitudes and understanding of IPP at a selected community health centreSETTING: This study was conducted at a primary healthcare facility in the Western Cape, South AfricaMETHODS: Ethical clearance and permission to conduct the study was obtained from all relevant stakeholders. Four focus group discussions were conducted with health professionals at the facility. Themes, codes and categories were highlighted from the transcripts of the audiotape-recorded dataFINDINGS: The findings suggest that health professionals do not have an understanding of IPP, and are thus unable to apply it practically. The health professionals perceived certain healthcare processes in the facility as barriers to the integration of practices. In addition, the health professionals expressed the need for interprofessional relationships, creation of opportunities for IPP, and communication to transform the current practiceCONCLUSION: To implement IPP into this facility, effectively, the authors of this study recommend that facility management implement campaigns for and training on, the transition to IPP, staff induction programmes and regular meetings

ORIENTATION: The South African higher education system is highly dependent on institutional cultures to enable the progression of academics with the aim to unlock the research potential of the country. Institutional cultures are directed by the values, practices and behaviours of its members. RESEARCH PURPOSE: Establish and present, from the academics' point of view, the values, practices and behaviours that facilitate an enabling institutional culture, which supports the career progression of academic staff. MOTIVATION FOR THE STUDY: A comprehensive and deeper understanding of any higher education institutional culture requires analysis beyond the structural elements and established procedures of the institution. An understanding of how individuals interpret their environment, to support their career progression, is equally important. RESEARCH APPROACH/DESIGN AND METHOD: A qualitative, phenomenological approach was followed, through individual, semi-structured interviews with 17 academics, across all career phases. MAIN FINDINGS: An institutional culture in support of academic career progression includes three major values of: equity and inclusion, an ethic of care and collaboration, that are interconnected to practices such as performance management, a career management system, a comprehensive induction and orientation, a collaborative structure, remuneration, as well as resources and support, together with behaviours, comprising the articulation of team values, alignment of individual and institutional values, as well as a systemic approach. PRACTICAL/MANAGERIAL IMPLICATIONS: Understanding the values, practices and behaviours within the context of higher education offers leaders and talent management practitioners the necessary factors to consider as they grapple to understand a culture that enables the career progression of academic staff. CONTRIBUTION/VALUE-ADD: Deeper understanding, from the academics' point of view, the values, practices and behaviours that facilitate an enabling institutional culture, which supports the career progression of academic staff.

ABSTRACT Objetives: to analyze the ingredients of the competence that the nurses use in the performance of their work in hemotherapy. Methods: qualitative study with 22 nurses, accomplished through documentary study, observation and semi-structured interview, with resources of Atlas.ti software based on the foundations of Historical Materialism Dialectic and Ergology. Performed Content Analysis. Results: the domain of specific knowledge of hemotherapy and the time of experience in the area, allied to the motivation of the worker and the ability to work in a team favor the competent action in the work activities. On the other hand, the lack of adequate work conditions, especially in relation to adequate materials, equipment and structure, impairs the work of the nurse in hemotherapy. Final Considerations: experience gained is critical to successful decision making. In addition, adequate working conditions, updating of knowledge and ability in teamwork favor a scenario of safe practices.

RESUMEN Objetivos: analizar los ingredientes de la competencia que los enfermeros utilizan en la realización de su trabajo en la hemoterapia. Métodos: estudio cualitativo con 22 enfermeros, realizado por medio de estudio documental, observación y entrevista semiestructurada, con recursos del software Atlas.ti con base en los fundamentos del Materialismo Histórico Dialéctico y de la Ergología. Se realizó un análisis de contenido. Resultados: el dominio del conocimiento específico de la hemoterapia y el tiempo de experiencia en el área, aliados a la motivación del trabajador y la capacidad de trabajo en equipo favorecen el actuar con competencia en las actividades laborales. Por otro lado, la falta de condiciones adecuadas de trabajo, especialmente en relación a materiales, equipos y estructura adecuados, perjudican el trabajo del enfermero en hemoterapia. Consideraciones Finales: La experiencia adquirida es determinante para el éxito en la toma de decisiones. Además, condiciones adecuadas de trabajo, actualización de conocimientos y habilidad en el trabajo en equipo favorecen un escenario de prácticas seguras.

RESUMO Objetivos: analisar os ingredientes da competência que os enfermeiros utilizam na realização do seu trabalho na hemoterapia. Métodos: estudo qualitativo com 22 enfermeiros, realizado por meio de estudo documental, observação e entrevista semiestruturada, com recursos do software Atlas.ti, embasado nos fundamentos do Materialismo Histórico Dialético e da Ergologia. Foi efetuada Análise de Conteúdo. Resultados: o domínio do conhecimento específico da hemoterapia e o tempo de experiência na área, aliados à motivação do trabalhador e à capacidade de trabalho em equipe, favorecem o agir com competência nas atividades laborais. Por outro lado, a falta de condições adequadas de trabalho, especialmente em relação a materiais, equipamentos e estrutura adequados, prejudica o trabalho do enfermeiro em hemoterapia. Considerações Finais: a experiência adquirida é determinante para o sucesso na tomada de decisão. Além disso, condições adequadas de trabalho, atualização de conhecimentos e habilidade no trabalho em equipe favorecem um cenário de práticas seguras.

RESUMO Objetivos: analisar os ingredientes da competência que os enfermeiros utilizam na realização do seu trabalho na hemoterapia. Métodos: estudo qualitativo com 22 enfermeiros, realizado por meio de estudo documental, observação e entrevista semiestruturada, com recursos do software Atlas.ti, embasado nos fundamentos do Materialismo Histórico Dialético e da Ergologia. Foi efetuada Análise de Conteúdo. Resultados: o domínio do conhecimento específico da hemoterapia e o tempo de experiência na área, aliados à motivação do trabalhador e à capacidade de trabalho em equipe, favorecem o agir com competência nas atividades laborais. Por outro lado, a falta de condições adequadas de trabalho, especialmente em relação a materiais, equipamentos e estrutura adequados, prejudica o trabalho do enfermeiro em hemoterapia. Considerações Finais: a experiência adquirida é determinante para o sucesso na tomada de decisão. Além disso, condições adequadas de trabalho, atualização de conhecimentos e habilidade no trabalho em equipe favorecem um cenário de práticas seguras.

ABSTRACT Objetives: to analyze the ingredients of the competence that the nurses use in the performance of their work in hemotherapy. Methods: qualitative study with 22 nurses, accomplished through documentary study, observation and semi-structured interview, with resources of Atlas.ti software based on the foundations of Historical Materialism Dialectic and Ergology. Performed Content Analysis. Results: the domain of specific knowledge of hemotherapy and the time of experience in the area, allied to the motivation of the worker and the ability to work in a team favor the competent action in the work activities. On the other hand, the lack of adequate work conditions, especially in relation to adequate materials, equipment and structure, impairs the work of the nurse in hemotherapy. Final Considerations: experience gained is critical to successful decision making. In addition, adequate working conditions, updating of knowledge and ability in teamwork favor a scenario of safe practices.

RESUMEN Objetivos: analizar los ingredientes de la competencia que los enfermeros utilizan en la realización de su trabajo en la hemoterapia. Métodos: estudio cualitativo con 22 enfermeros, realizado por medio de estudio documental, observación y entrevista semiestructurada, con recursos del software Atlas.ti con base en los fundamentos del Materialismo Histórico Dialéctico y de la Ergología. Se realizó un análisis de contenido. Resultados: el dominio del conocimiento específico de la hemoterapia y el tiempo de experiencia en el área, aliados a la motivación del trabajador y la capacidad de trabajo en equipo favorecen el actuar con competencia en las actividades laborales. Por otro lado, la falta de condiciones adecuadas de trabajo, especialmente en relación a materiales, equipos y estructura adecuados, perjudican el trabajo del enfermero en hemoterapia. Consideraciones Finales: La experiencia adquirida es determinante para el éxito en la toma de decisiones. Además, condiciones adecuadas de trabajo, actualización de conocimientos y habilidad en el trabajo en equipo favorecen un escenario de prácticas seguras.

Resumen El Batolito de Acandí es un cuerpo intrusivo con amplias variaciones composicionales (González y Londoño, 2002) que data del Oligoceno (Restrepo y Toussaint, 1976), a su vez intruído por cuerpos subvolcánicos de andesitas, dacitas, y diques de basaltos. Debido a la diferencia composicional de este cuerpo en la cordillera Occidental, se realiza la integración e interpretación de datos del análisis petrográfico, geoquímico e isotópico de muestras recolectadas en la parte norte del Golfo de Urabá entre los municipios de Acandí y Unguía en el departamento de Chocó. En esta zona, las rocas del Batolito son gabros: rocas melanocráticas, masivas, equigranulares de grano fino a medio, subhedrales, de textura fanerítica; y las de los cuerpos subvolcánicos y diques son: rocas leucocráticas, masivas, inequigranulares, de grano fino a medio, subhedrales, con textura porfirítica y rocas melanocráticas afaníticas (basaltos). Petrografía detallada muestra que las rocas del Batolito son compuestas por plagioclasa, piroxenos y anfíboles, como accesorios pirita diseminada, apatita, magnetita e ilmenita. Son rocas holocristalinas, melanocráticas, inequigranulares, subhedrales, de fino a groso granulares, con presencia de texturas ofíticas y subofíticas, con coronas de reacción y zonación en plagioclasas. Las rocas subvólcanicas que intruyen el batólito son basaltos afaníticos, dacitas y andesitas con texturas porfiríticas, con plagioclasa y hornblenda como minerales principales. Son inequigranulares, de tamaño muy fino a grueso, con texturas cúmulo-porfiríticas, vesiculares y amigdulares. Los análisis geoquímicos e isotópicos indican que tanto las rocas del batolito como las de los cuerpos que lo intruyen, son de afinidad subalcalina de la serie calco-alcalina de bajo a medio K, metaluminosas, con enriquecimiento en elementos de tierras raras leves en relación a las tierras raras pesadas. Los datos geoquímicos e isotópicos de Nd y Sr sugieren que estas rocas se forman a partir de procesos en arcos de islas, asociados a zonas de subducción, siendo posteriormente acrecionadas al margen continental.

Abstract The Acandi’s batholith is a large intrusive body with a wide compositional variation (Gonzalez and Londoño, 2002) dating from the Oligocene (Restrepo and Toussaint, 1976), and intruded by subvolcanic andesites and dacites bodies and basalt dikes. Due to the compositional difference of this body in the Western Cordillera, it is performed integration and interpretation of new petrographic, geochemical and isotopic data from samples collected in the northern Gulf of Urabá between the towns of Acandí and Unguía it is done in Choco department. For this area, batholith rocks are gabbros: melanocratic rocks, massive, equigranular fine to medium grained, subhedral, phaneritic texture; and the subvolcanic bodies and dikes are: leucocratic, massive and inequigranular rocks, fine to medium grained, subhedral, with sporphyritic texture and aphanitic melanocratic rocks (basalts). Detailed petrography shows that the rocks from the Batolith are constituted by plagioclase, pyroxene and amphibole, with disseminated pyrite, apatite, magnetite and ilmenite as accessory phases. The batholith rocks are holocrystalline, melanocratic, inequigranular, subhedral, from fine to granular roughly, with the presence of ophitic and subophitic textures, with reaction rings (coronas) and zoning in plagioclase. The intrusive subvolcanic rocks that crosscut the Batholith are afanitic basalts, dacites, and andesites with porphiritic textures, having plagioclase and hornblende as main minerals. They are inequigranular, very fine to coarse grained, with glomeroporphyritic texture and also vesicular and amygdular textures. Geochemical and isotopic analyses indicate that both batholiths and intrusive rocks are sub-alkaline from the calc-alkaline series of low to medium K, metaluminous with light rare earth elements enrichment in relation to the heavy rare earth elements. The geochemical and Nd and Sr isotopic data suggest that these rocks are formed in island arcs, associated with subduction zones, being later added to a continental margin.

RESUMO O uso de inteligência artificial pode representar uma estratégia eficiente de simulação e otimização de processos importantes na agricultura. O objetivo deste estudo é propor o uso de inteligência artificial via redes neurais artificiais e algoritmos genéticos, respectivamente, na simulação da produtividade de grãos de aveia (Avena sativa) e na otimização da densidade de semeadura, nos principais sistemas de sucessão do sul do Brasil. O estudo foi conduzido em blocos ao acaso com quatro repetições em esquema fatorial 4 x 2, para as densidades de semeadura (100, 300, 600 e 900 sementes m-2) e cultivares de aveia (Brisasul e URS Taura), nos sistemas de sucessão milho/aveia e soja/aveia. Implementou-se uma rede neural artificial de múltiplas camadas e um algoritmo genético, em linguagem de programação Java, e comparou-se os resultados obtidos desta implementação com análises tradicionais de regressão polinomial. O uso de inteligência artificial via redes neurais artificiais e algoritmos genéticos permite simular com eficiência a produtividade de grãos de aveia e melhor otimização da densidade de semeadura na comparação com regressão polinomial, considerando os principais sistemas de sucessão no sul do Brasil.

ABSTRACT Artificial intelligence may represent an efficient strategy for simulation and optimization of important processes in agriculture. The main goal of the study is to propose the use of artificial intelligence, namely artificial neural networks and genetic algorithms, respectively, in the simulation of oat grain yield and optimization of seeding density, considering the main succession systems of southern Brazil. The study was conducted in a randomized complete block design with four replicates, following a 4 x 2 factorial scheme, for seeding densities (100, 300, 600 and 900 seeds m-2) and oat cultivars (Brisasul and URS Taura), in succession systems of corn/oats and soybean/oats. A multi-layered artificial neural network and a genetic algorithm were implemented in Java programming language, and the results obtained from this implementation were compared with traditional polynomial regression. The use of artificial intelligence through neural networks and genetic algorithms allows the efficient simulation of oat grain yield and better optimization of seeding density in comparison to polynomial regression, considering the main succession systems in southern Brazil.

BACKGROUND: Understanding caregivers' views on rehabilitation services is important as it may assist in informing healthcare services and patient management. OBJECTIVES: The aim of this study was to explore caregivers' perceptions and satisfaction regarding rehabilitation services in the Western Cape, South Africa, and to inform clinical practice and policy in this emerging field. METHOD: This study used a descriptive, qualitative design using in-depth interviews with conveniently selected participants. Interviews were conducted with 13 caregivers of patients with: amputations (3), cerebrovascular accidents (5) and neuromuscular disorders (5). Thematic content analysis was conducted with the transcripts. RESULTS: Four key themes emerged, which were (1) financial difficulties, (2) caregiver and therapist relationships, (3) facility management and (4) caregiver experience with service delivery CONCLUSION: Based on the participants' feedback, the rehabilitation services seem to be meeting the basic rehabilitation needs of the patients; however, the needs of the caregivers require attention.

ABSTRACT The use of fuels for agricultural Diesel engines cycle, both of mineral origin (Diesel) or vegetable and animal origin (biodiesel) can significantly alter its performance. Therefore, the aim of this study was to quantify the change in torque, power and consumption of agricultural Diesel engine fuel using minerals and vegetables fuels. It was used a tractor power take-off coupled to a magnetic brake dynamometer (for measuring speed and torque for subsequent calculation of power), and a flow meter (for measuring the hourly fuel consumption and specific fuel consumption calculation). Eleven different fuels (S10 mineral diesel with 5%, 10%, 15%, 20% and 50% biodiesel and mineral diesel S500 with 5%, 10%, 15%, 20% and 50% biodiesel, have been used pure biodiesel B100). The results indicate that the increase of biodiesel in mineral diesel reduces torque and power, increases the specific fuel consumption and practically does not change the hourly consumption. This reduction in torque and power occurs with greater intensity in Diesel S10. Additions of 10% biodiesel in mineral diesel reduces the maximum torque 1.65 Nm (0.6%), the maximum power at 0.33 kW (0.6%) and increases the specific fuel consumption of 3.6 g kWh -1 (1.3%).

En este trabajo se presenta la descripción petrográfica de secciones de núcleos (YAR-06, YAR-017 y YAR- 019) pertenecientes al Sistema Porfirítico Yarumalito, con el objeto de identificar la litología y alteraciones hidrotermales asociadas con mineralizaciones de oro en este sistema, propiedad de Colombian Mines Corporatión, este proyecto se localiza a 4,3Km al sur del municipio de Valparaíso, Antioquia. La descripción de estas secciones se realiza mediante el análisis macroscópico de núcleos de perforación, petrografía y microscopia electrónica (SEM); petrográficamente los cuerpos hipoabisales corresponden a andesitas y dacítas con alteraciones potásica, propilítica, cuarzo-sericita y sericítica; estás alteraciones tienen distribución en halos de vetillas o al interior de estas y menormente se presenta con una distribución penetrativa. En las secciones analizadas, el pulso inicial corresponde pórfidos de composición andesítica, con alteraciones potásica, cuarzo-sericitica y propilítica, este pulso es seguido por pórfidos dacíticos que presenta las mismas alteraciones pero con una intensidad mayor y finalmente estos cuerpos hipoabisales son cortados por pequeños diques dacíticos cuya alteración principal es sericitica. La mineralogía de los pórfidos aporta datos sobre las etapas evolutivas del sistema, así por ejemplo se observa como el pulso inicial es más básico y progresivamente va pasando a composiciones moderadamente más félsicas; de igual manera ocurre con las texturas de estos cuerpos, que sugieren niveles de profundidad relativamente diferentes para los pulsos identificados; por otra parte las texturas secundarias y las alteraciones presentes indican una prominente interacción con fluidos de origen magmático-hidrotermal.

This paper describes petrographically sections of drill core (YAR-06, YAR-017 and YAR-019) belonging to the Yarumalite Porphyritic System, in order to identify the lithology and hydrothermal alterations associated with gold mineralization in this system, owned of Colombian Mines Corporation, this project is located 4,3 Km south of the municipality of Valparaiso, Antioquia. The description of these sections bodies is made by the macroscopic analysis of drilling cores, optical petrography and electron microscopy (SEM); petrographically the hypoabisal bodies correspond to andesites and dacites with potassic, propylitic, quartz-sericite and serictic alterations; these alterations have distribution in halos of veins or to the interior of these and less occurs with a distribution pervasive in the rock. In the analyzed sections, the initial pulse corresponds to andesitic porphyries, with potassic, quartzsericitic and propylitic alterations, this pulse is followed by dacitic porphyries that presents the same alterations but with a greater intensity and finally these hypoabisal bodies are cut by small dacitic dykes whose main alteration is sericitic. The mineralogy of the porphyries provides data on the evolutionary stages of the system, for example it is observed as the initial pulse is more basic and progressively goes to compositions moderately more felsic; similarly to the textures of these bodies, which suggest relatively different levels of depth for the identified pulses; on the other hand the secondary textures and hydrothermal alterations presents, suggest a prominent interaction with fluids of magmatic-hydrothermal origin.

There is a dearth of literature on the postnatal quality of life (QoL) of women. This study aimed to determine to QoL of HIV-infected and non-infected women post-caesarean section delivery. This prospective, longitudinal and comparative study was conducted at four public hospitals in KwaZulu-Natal. The participants were followed for six-months post-delivery and the QoL was measured using the SF-36 and the pelvic floor impact questionnaire (PFIQ-7). The results showed that the QoL of women were negatively affected post-operatively with the HIV-infected group scoring lower over the six-months. Understanding postpartum QoL problems is essential in efforts to provide effective comprehensive care.

RESUMO: A demanda mundial por combustíveis alternativos ao óleo Diesel mineral vem crescendo, tanto pela sustentabilidade, quanto por exigências ambientais. Isso faz com que as indústrias e as instituições de pesquisa desenvolvam novas alternativas para o uso destes combustíveis. Nesse contexto, objetivou-se avaliar os parâmetros de desempenho de um motor agrícola, com dois diferentes combustíveis, Diesel mineral e etanol. O experimento foi realizado em bancada dinamométrica, utilizando dois motores de uso agrícola, porém, com alterações no sistema de injeção de combustível, Diesel e etanol, na faixa de rotação entre 1200 e 2300rpm. O desempenho dos motores foi analisado por meio da tomada de potência dos tratores para cada combustível, conforme estabelece a norma NBR ISO 1585. A partir dos dados obtidos, concluiu-se que, ao considerar a rotação de trabalho que fornece 540rpm na tomada de potência, houve alteração no desempenho do motor movido a etanol, com redução da potência máxima e aumento do consumo específico de combustível.

ABSTRACT: The global demand for alternatives for mineral diesel oil is growing due to the need for satisfying sustainability and environmental requirements, forcing industries and research institutions to develop new alternative fuels. The objective of this study was to evaluate the performance parameters of an agricultural engine using two different fuels: mineral diesel oil and ethanol. The experiment was conducted on a dynamometric stand using two engines for agricultural use but with a modified fuel injection system, suitable for both diesel and ethanol, in the speed range 1200-2300rpm. The performance of the engines was analyzed considering the power take-off from the tractors for each fuel, as established in the standard NBR ISO 1585. The data obtained showed that at the working speed that provides 540rpm at the power take-off, the engine performance changed when powered by ethanol, with a reduction in the maximum power and increased specific fuel consumption.