objective: to investigate the application of quality function deployment (qfd) in the central library reference service quality science.methodology / approach: this study was a descriptive survey research and application. research instrument, libqual questionnaire and interview. the three-stage qfd model and the concentration of 7-seater model were used to determine the correlation matrix. the ...

introduction: many of study show decrease of quality of life in mothers of children with cerebral palsy due to care activity of their child but the researchers less pay attention to the decrease of mother’s quality of life in relationship with child-related factors like walking ability in children with cerebral palsy, so the aim of this study was tocomparing the quality of life of mothers with ...

The quality loss function developed by Genichi Taguchi considers three cases, nominal-thebest, smaller-the-better, and larger-the-better. The methodology used to deal with the larger-thebetter case is slightly different than the other two cases. This research employs a term called target-mean ratio to propose a common formula for all three cases to bring about similarity among them. The target-...

We propose a quartic function to represent a family of continuous quality loss functions. Depending on the choice of its parameters the shape of this function within the specification limits can be either symmetric or asymmetric, and it can be either similar to the ubiquitous quadratic loss function or somewhat closer to the conventional step function. We examine this family of loss functions i...

background: studies showed that poor quality of sleep is a common problem among the elderly. because of drug complications and side effects such as drug dependency and resistance and decrease of sleep depth in long‑term intake of sleep medication, cognitive‑behavior therapy including sleep restriction therapy which does not cause these problems is more considered. materials and methods: this is...

objective : poor premorbid adjustment has been reported to be a predictor of more severe psychotic symptoms and poor quality of life in such psychotic disorders  as  schizophrenia.  however,  most  studies  were  performed  on chronic schizophrenic patients, and proposed the likelihood of recall biases and the effect of chronicity.  the aim of this study was to investigate these factors in a sa...