In this paper, we investigate a single-server Poisson input queueing model, wherein arrivals of units are in bulk. The arrival rate of the units is state dependent, and service time is arbitrary distributed. It is also assumed that the system is subject to breakdown, and the failed server immediately joins the repair facility which takes constant duration to repair the server. By using suppl...

the management of machine replacement (specifically tractors) is one of the most critical factors for performing field operations on time. therefore, tractor repair and maintenance costs must be accurately predicted. this research was carried out to evaluate the use of the regression technique in predicting tractor repair and maintenance costs. the study was conducted using empirical data on 60...

although the increase in the number of core sutures during flexor tendon repair increases the tensile strength of the repair, both increased handling at the time of repair and increased bulk at the repair site have been hypothesized as affecting clinical outcomes by increasing gliding resistance. the purpose of our study was to assess whether increasing the number of core sutures from two stran...

introduction: the pericranial flaps' benefits have been described in many otolaryngologic, maxillofacial and plastic surgery literature. the benefits ar e due to the pericranial flaps unique characteristics including good flexibility and mobility, very rich blood supply from several arterial sources and access to sufficient bulk of the flap without any need for distant surgical sites. usin...

A more systemic design of regional processes of development and learning has gradually gained importance in institutions for national as well as European promotion of research and innovation in the course of the nineties (Ash, Thrift 1994). An essential difference as against earlier promotion programmes, however, lies in an enlarged understanding of innovative development of enterprises and reg...

AIM The aim of this study was to describe, explore and explain the concept of sustainability in nursing. BACKGROUND Although researchers in nursing and medicine have emphasised the issue of sustainability and health, the concept of sustainability in nursing is undefined and poorly researched. A need exists for theoretical and empirical studies of sustainability in nursing. DESIGN Concept an...

Nowadays methods of measurement and assessment of the level of sustained development at the international, national and regional level are a current research problem, which requires multi-dimensional analysis. The relative assessment of the sustainability level of the European Union member states and the comparative analysis of the position of Poland relative to other countries was the aim of t...