Context: Properly modelling scattering by interstellar dust grains requires a good characterisation of the phase function. The Henyey-Greenstein function has become standard for describing anisotropic grains, but it is poor representation real outside optical range. Aims: We investigate alternatives that would allow properties to be described. Our goal find balance between realism and complexit...

in this ever changing business scenario, success of the company lies in understanding the customer preferences, tastes and anticipating the changes required in existing or new products being offered. it was desired to develop a model which allows decision makers to decompose a complex problem in a hierarchical structure to show the relationship of the goals, objectives, criteria and alternative...

Process of purchase or supply is one of the most important factors of competitiveness of companies. Therefore, the supply managers of companies are expected to select and evaluate the suppliers, to provide the company needs. Evaluation of suppliers based on only one factor is not possible and it is necessary to adopt a method that several factors simultaneously be evaluated. Suppliers can be ev...

In recent years, determining the best supplier has become a key strategic consideration in the competitive market. Since the decision commonly involves evaluating different criteria or attributes, supplier selection process is a multiple criteria decision-making (MCDM) problem. This study integrates the Taguchi loss function, analytical hierarchy process (AHP) and multi-choice goal programming ...

introduction tourism is an ancient phenomenon which has existed in human societies for many years. with the development of humankind in different historical periods, tourism has gradually changed to a technical, economical and social subject. an important part of world tourism activities is based on a powerful tendency to use nature, known by “ecotourism”. ecotourism is an international concept...

Introduction: Breastfeeding is the ideal source of nutrition for infants. However, there is controversy regarding the effect of breastfeeding on mothers’ sexual function. Therefore, this study aimed to assess the relationship between postpartum sexual function and infant feeding method in women referring to Mashhad healthcare centers. Methods: This descriptive, analytical study was performed o...