Converting simulated total dry matter to fresh marketable yield for field vegetables at a range of nitrogen supply levels

Simultaneous analysis of economic and environmental performance of horticultural crop production requires qualified assumptions on the effect of management options, and particularly of nitrogen (N) fertilisation, on the net returns of the farm. Dynamic soil-plant-environment simulation models for agro-ecosystems are frequently applied to predict crop yield, generally as dry matter per area, and the environmental impact of production. Economic analysis requires conversion of yields to fresh marketable weight, which is not easy to calculate for vegetables, since different species have different properties and special market requirements. Furthermore, the marketable part of many vegetables is dependent on N availability during growth, which may lead to complete crop failure under sub-optimal N supply in tightly calculated N fertiliser regimes or low-input systems. In this paper we present two methods for converting simulated total dry matter to marketable fresh matter yield for various vegetables and European growth conditions, taking into consideration the effect of N supply: (i) a regression based function for vegetables sold as bulk or bunching ware and (ii) a population approach for piecewise sold row crops. For both methods, to be used in the context of a dynamic simulation model, parameter values were compiled from a literature survey. Implemented in such a model, both algorithms were tested against experimental field data, yielding an Index of Agreement of 0.80 for the regression strategy and 0.90 for the population strategy. Furthermore, the population strategy was capable of reflecting rather well the effect of crop spacing on yield and the effect of N supply on product grading

Occupational Burnout Syndrome in the nursing context: an integrative literature review

OBJECTIVE To characterize the scientific production on Burnout Syndrome in the Nursingcontext, systematizing the location where the studies were carried out, the related constructs, the employed methods and their main results. METHOD An integrative review of the literature with a bibliometric approach of articles published in Portuguese, Spanish and English between 2005 and 2016. RESULTS 106 articles wereincluded. Mostinvolvedprevalence, and were descriptive, quantitative studies performed in hospitals.The Southeastern and Southern regions of Brazil had the largest number of publications, and stress was the construct most related to burnout.Most of the studies used the Maslach Burnout Inventory to investigate the presence of the syndrome. CONCLUSION New case-control and cohort studies should be carried out.Qualitative-exploratory studies are necessary to better understand Burnout Syndrome among nursing professionals usingfocus groups or interviews, as well as comparative causal studies, with the purpose of exploring the syndrome’smanifestations.OBJETIVO Caracterizar a produção científica sobre a Síndrome do Esgotamento Profissionalno contexto da enfermagem, sistematizando os locais onde as pesquisas foram realizadas, os construtos relacionados, os métodos empregados e seus principais resultados. MÉTODO Revisão integrativa da literatura, com abordagem bibliométrica, em artigos na língua portuguesa, espanhola e inglesa publicados entre 2005 e 2016. RESULTADOS Foram selecionados 106 artigos.A maioria estudos de prevalência, descritivos, quantitativos e realizados em hospitais. Nas regiões Sudeste e Sul do Brasil encontram-se o maior número de publicações, sendo o estresse o construto mais relacionado com o esgotamento profissional. A maior parte dos estudos utilizou o Maslach Burnout Inventory como meio de averiguação da presença da síndrome. CONCLUSÃO Novos estudos de caso controle e coorte devem ser realizados. Pesquisas de cunho qualitativo-exploratório são necessárias para poder compreender melhor a Síndrome do Esgotamento Profissionalentre os profissionais de enfermagem com grupos focais ou entrevistas, como também pesquisas causais comparativas, com o intuito de explorar as manifestações da síndrome.OBJETIVO Caracterizar la producción científica acerca del Síndrome del Agotamiento Profesionalen el marco de la enfermería, sistematizando los sitios en donde las investigaciones fueron realizadas, los constructos relacionados, los métodos empleados y sus principales resultados. MÉTODO Revisión integrativa de la literatura, con abordaje bibliométrico, en artículos en lengua portuguesa, española e inglesa publicados entre 2005 y 2016. RESULTADOS Fueron seleccionados 106 artículos. La mayoría se compuso de estudios de prevalencia, descriptivos, cuantitativos y realizados en hospitales. En las regiones Sureste y Sur de Brasil se halla el mayor número de publicaciones, siendo el estrés el constructo más relacionado con el agotamiento profesional. La mayor parte de los estudios utilizó el Maslach Burnout Inventorycomo medio de la averiguación de la presencia del síndrome. CONCLUSIÓN Nuevos estudios de caso control y cohorte deben llevarse a cabo. Investigaciones de cuño cualitativo-exploratorio son necesarias para poder comprender mejor el Síndrome del Agotamiento Profesionalentre los profesionales de enfermería con grupos focales o entrevistas, como también investigaciones causales comparativas, a fin de explorar las manifestaciones del síndrome