This paper proposed a nonlinear robust control for spacecraft attitude based on passivity and disturbance suppression vector. The spacecraft model was described using quaternion. The control law introduced the suppression vector of external disturbances and had no information related to the system parameters. The desired performance of spacecraft attitude control could be achieved using the des...

The purpose of this research was to develop a multidimensional attitude scale which measures beliefs, feelings, and behaviors related to helping. Four-hundred and eight undergraduate students took part in one of four studies used to evaluate the psychometric properties of the Helping Attitude Scale (HAS). These preliminary studies suggest that the HAS is a reliable and valid measure of helping ...

background: available evidence shows that religious attitudes have noticeable effects on all aspects of human life. the purpose of this study was to evaluate religious attitude of freshmen at school of health, isfahan university of medical sciences (isfahan, iran). methods: in a descriptive, cross-sectional study in 2010, religious attitude of 200 students was assessed by a reliable and valid r...

marketing literature reveals that perceived value is always considered to be of paramount importance when consumers purchase a product. in order to form a positive attitude towards green products resulting from a higher perceived value, the products proclaimed as green should incorporate the worth which consumers value the most while purchasing. the present study investigates whether there is a...

Safety attitude is of vital importance to accident prevention, and the high accident rate in the coal mining industry makes it urgent to undertake research on coal miners’ safety attitude. However, the current literature still lacks a valid and reliable safety attitude measurement scale for coal miners, which stands as a barrier against their safety attitude improvement. In this study, a scale ...

This study examined the direct and indirect associations of general and smoking-specific parenting practices with Chinese adolescents' smoking behaviors. Adolescents aged 14-17 years (N = 658) and their parents were recruited from three high schools in mainland China. Adolescents completed an anonymous online survey on their smoking behaviors, perceptions of parenting behaviors, and smoking-rel...

induced abortion is one of the problems to which some women resort for different reasons including family planning, to hide their illegal relations, avoid unwanted pregnancy, rape, etc. physical and psychological aftermaths of abortion on women who experience it as well as cultural and social conditions of abortion show the importance of paying attention to the problem. this research aims to st...

INTRODUCTION Ancillary hospital personnel represent an important body of opinion because as they work in a hospital their opinion has more credibility for the general public as a result of their activity in hospitals. However, in most cases they do not have any health care training which means that their attitude could be based on a lack of knowledge or unfounded fears. OBJECTIVE To analyze t...

AIM To identify nurses' barriers and facilitators to monitoring of nurse-sensitive outcomes in intensive care units (ICUs), and to explore influential nurse characteristics and work environment factors. DESIGN A cross-sectional survey in three Dutch ICUs between October 2013 - June 2014. METHODS A questionnaire with questions regarding facilitators and three types of barriers: knowledge, at...