Image reduction operators based on non-monotonic averaging functions

Image reduction is a crucial task in image processing, underpinning many practical applications. This work proposes novel image reduction operators based on non-monotonic averaging aggregation functions. The technique of penalty function minimisation is used to derive a novel mode-like estimator capable of identifying the most appropriate pixel value for representing a subset of the original image. Performance of this aggregation function and several traditional robust estimators of location are objectively assessed by applying image reduction within a facial recognition task. The FERET evaluation protocol is applied to confirm that these non-monotonic functions are able to sustain task performance compared to recognition using nonreduced images, as well as significantly improve performance on query images corrupted by noise. These results extend the state of the art in image reduction based on aggregation functions and provide a basis for efficiency and accuracy improvements in practical computer vision applications.

Consistency and stability in aggregation operators : an application to missing data problems

In this work we analyze the key issue of the relationship that should hold between the operators in a family {An} of aggregation operators in order to understand they properly define a consistent whole. Here we extend some of the ideas about stability of a family of aggregation operators into a more general framework, formally defining the notions of i – L and j – R strict stability for families of aggregation operators. The notion of strict stability of order k is introduced as well. Finally, we also present an application of the strict stability conditions to deal with missing data problems in an information aggregation process. For this analysis, we have focused in the weighted mean family and the quasi-arithmetic weighted means families.

Use of artificial neural networks as explicit finite difference operators

Results of a numerical exercise, substituting a numerical operator by an artificial neural network (ANN) are presented in this paper. The numerical operator used is the explicit form of the finite difference (FD) scheme. The FD scheme was used to discretize the one-dimensional transport equation, which included both the advection and dispersion terms. Inputs to the ANN are the FD representation of the transport equation, and the concentration was designated as the output. Concentration values used for training the ANN were obtained from analytical solutions. The numerical operator was reconstructed from a back calculation of the weights of the ANN. Linear transfer functions were used for this purpose. The ANN was able to accurately recover the velocity used in the training data, but not the dispersion coefficient. This capability was improved when numerical dispersion was taken into account; however, it is limited to the condition: C/P<0.5 , where C is the Courant number and P , the Peclet number (i.e., the restriction imposed by the Neumann stability condition).

Discovering implicit criteria preferences reflected in tourism journal ranking lists using the Choquet Integral

Variations between journal rankings may cause confusion. As such, prior attempts were made to compare and evaluate journal ranking criteria for obtaining insightful knowledge on how different research communities have ranked journals. However, existing approaches are unable to model the journal ranking process closely enough as they are incapable of considering the relationship between multiple criteria simultaneously. In this paper, we address the challenges by introducing the Choquet Integral (CI) for evaluating journal ranking criteria. The new approach is able to account for interactions between criteria in relation to overall ranking score, using a fuzzy measure in its computation. Its properties, the Shapley value and the Interaction index, allow for good representations of importance and interactions between criteria. We demonstrate the efficiency of the CI through a case study of journal ranking lists in tourism and service journals.

The role of general and specific stressors in the health and well-being of call centre operators

The call centre industry has developed a reputation for generating a highly stressful work environment with high absenteeism and turnover rates. Research has identified role ambiguity, role conflict, role overload, and work-family conflict as common stressors in other settings. Call centre research has additionally identified performance monitoring, job design and job opportunities as call centre specific stressors.OBJECTIVE AND METHODS: This study investigated the impact of the identified stressors on burnout, somatic symptomology, and turnover intent among 126 call centre representatives (CCRs) from 11 call centres in metropolitan Melbourne, Australia.

International perspectives on psychosocial working conditions, mental health, and stress of dairy farm operators

Dairy farm operators-farmers, workers, and family members-are faced with many demands and stressors in their daily work and these appear to be shared across countries and cultures. Dairy operators experience high psychosocial demands with respect to a hard work and production ethos, economic influences, and social and environmental responsibility. Furthermore, both traditional and industrial farms are highly dependent on external conditions, such as weather, fluctuating markets, and regulations from government authorities. Possible external stressors include disease outbreaks, taxes related to dairy production, and recent negative societal attitudes to farming in general. Dairy farm operators may have very few or no opportunities to influence and control these external conditions, demands, and expectations. High work demands and expectations coupled with low control and lack of social support can lead to a poor psychosocial work environment, with increased stress levels, ill mental health, depression, and, in the worst cases, suicide. Internationally, farmers with ill mental health have different health service options depending on their location. Regardless of location, it is initially the responsibility of the individual farmer and farm family to handle mental health and stress, which can be of short- or long-term duration. This paper reviews the literature on the topics of psychosocial working conditions, mental health, stress, depression, and suicide among dairy farm operators, farm workers, and farm family members in an international perspective.

Image reduction operators as aggregation functions: Fuzzy transform and undersampling

After studying several reduction algorithms that can be found in the literature, we notice that there is not an axiomatic definition of this concept. In this work we propose the definition of weak reduction operators and we propose the properties of the original image that reduced images must keep. From this definition, we study whether two methods of image reduction, undersampling and fuzzy transform, satisfy the conditions of weak reduction operators.

O sintoma dor: prevalência em um centro de atenção integral à saúde da mulher

Trata-se de uma pesquisa descritiva, transversal na vertente quantitativa para a avaliação da prevalência da dor na mulher em um centro de atenção à saúde integral da mulher de um município de São Paulo. A coleta de dados se deu por meio de um questionário estruturado com questões fechadas para caracterização da população e da dor, bem como, por instrumentos específicos para avaliação do impacto da dor nas atividades de vida diária. A dor demonstrou-se prevalente na população estudada e gerou novos parâmetros para a implementação de estratégias no manejo e alivio da dor, por meio, da Sistematização da Assistência de Enfermagem.

O sintoma dor: prevalência em um centro de atenção integral à saúde da mulher

Trata-se de uma pesquisa descritiva, transversal na vertente quantitativa para a avaliação da prevalência da dor na mulher em um centro de atenção à saúde integral da mulher de um município de São Paulo. A coleta de dados se deu por meio de um questionário estruturado com questões fechadas para caracterização da população e da dor, bem como, por instrumentos específicos para avaliação do impacto da dor nas atividades de vida diária. A dor demonstrou-se prevalente na população estudada e gerou novos parâmetros para a implementação de estratégias no manejo e alivio da dor, por meio, da Sistematização da Assistência de Enfermagem.

Métodos recursivos para o cálculo da integral de convolução

O objetivo principal deste trabalho é apresentar um método recursivo para a determinação da resposta forçada de sistema de segunda ordem na forma de uma íntegra de concolução, proveniente da utilização de propriedades de transição da resposta impulso de tais sistemas. Descrevem-se também diversos métodos analíticos e numéricos desenvolvidos para o cálculo da resposta forçada, bem como as limitações de cada método. As vantagens do método recursivo proposto são notáveis já que não é requerido o cálculo de autovalores das matrizes nem a redução à primeira ordem, e nem o uso de hipóteses adicionais sobre natureza dos coeficientes matriciais do sistema. Como aplicação do método proposto, considera-se o cálculo da resposta dinâmica de estruturas flexíveis sujeitas a excitações arbitrárias tais como terremotos.

O programa de saúde da família : estudo da utilização dos elementos de liderança transformacional na atuação das equipes em famílias portadoras de hipertensão arterial sistêmica e/ou diabetes melito assistidas pelas unidades de saúde da família da Coordenação Norte do Projeto Qualidade Integral a Saúde II : Fundação Zerbini e seus resultados no cotidiano destas famílias

Trata dos resultados obtidos pela Coordenação Norte do Projeto QUALlS II Fundação Zerbini, mediante ações de saúde implementadas junto às famílias portadoras de hipertensão arterial sistêmica e/ou diabetes melito. Aborda o comportamento das equipes de saúde da família com base na Teoria de Liderança Transformacional e aponta possível relação entre este e as mudanças obtidas no cotidiano das famílias estudadas