The sound produced by a dental air turbine handpiece (dental drill) can markedly influence the sound environment in a dental clinic. Indeed, many patients report that the sound of a dental drill elicits an unpleasant feeling. Although several manufacturers have attempted to reduce the sound pressure levels produced by dental drills during idling based on ISO 14457, the sound emitted by such dri...

INTRODUCTION Recently, mass-casualty incident (MCI) preparedness and training has received increasing attention at the hospital level. OBJECTIVES To review the existing evidence on the effectiveness of disaster drills, technology-based interventions and tabletop exercises in training hospital staff to respond to an MCI. METHODS A systematic, evidence-based process was conducted incorporatin...

The characteristics of carbon fibre reinforced plastics allow a very broad range of uses. Drilling is often necessary to assemble different components, but this can lead to various forms of damage, such as delamination which is the most severe. However, a reduced thrust force can decrease the risk of delamination. In this work, two variables of the drilling process were compared: tool material ...

pits, quarries, and on construction sites. The prediction of the penetration rate of drilling machines is very important for cost estimation and planning of rock excavation projects. Many researchers have investigated percussive drilling theoretically or experimentally and correlated the penetration rate with various rock properties. Protodyakonov (1962) developed drop tests and described the c...

ABSTRACT The aim of this work was to define a model volleyball drills’ structure. A set parameters has been designed and tested for: i) pertinence accuracy; ii) criteria reliability; iii) practical application. Expert judges evaluated model’s pertinence, accuracy reliability. sample 50 drills assessed for analysis. demonstrated accuracy, with complete agreement among experts. Criteria were reli...

OBJECTIVES During disasters, the public expects that emergency care will be available at a moment's notice. As such, an emergency medical services (EMS) workforce that is trained and prepared for disasters is imperative. The primary objectives of this study were to quantify the amount of individual-level training EMS professionals receive in terrorism and disaster-preparedness, as well as to as...

Given a computer-based instructional program and a school in which to work, it is possible to supplement or enrich the teacher’s instruction by taking over the more routine daily tasks, presenting special materials, or giving the daily lesson itself. The task of the present project was to prepare a program in arithmetic t o review and teach the basic number facts as a supplement to the teacher...

Studies of polyspecific associations among African forest primates have primarily focused on arboreal Cercopithecus and Procolobus/Colobus species. We examined the association frequency of the terrestrial drill (Mandrillus leucophaeus) with six sympatric monkey species in Korup National Park, Cameroon, testing reports that Mandrillus associations are infrequent and transient. We conducted 3,284...