introduction: some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. the aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. methods: 40 iti implants were placed in acrylic blocks and divided into 4 groups. in groups one and two, 10 iti one...

It is pretended to present an effective teaching system for programming of Linux device drivers is presented. With this system the basic skills to create Linux device drivers can be obtained in efficient manner during one hour of theoretical lesson and two hours of workshop with and hands on. In order to get the best learning results it's strongly recommended to use real hardware devices. The m...

Introduction: Some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. The aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. Methods: 40 ITI implants were placed in acrylic blocks and divided into 4 groups. In groups one and two, 10 ITI one...

Driver assistance and information systems become more and more important in modern vehicles. One general aim of these systems is to optimize driver’s current workload, because overload as well as underload can increase errors, lead to critical situations and is furthermore experienced as unpleasant for the driver. To prevent these, driver information management systems can coordinate the distri...

This paper reviews issues in and procedures for the safety evaluation of in-vehicle Advanced Driver Assistance Systems. Contrasts are drawn between the two main areas of driver assistance systems — on the one hand information systems which interact with the driver and on the other hand intervening systems which interact directly with the vehicle. Navigation systems are typical of the former cat...

The rise of peer-to-peer marketplaces has led to many previously unrated commercial transactions being rated. Of course, online rating systems can lead, on occasion, to reviews that are unfair or unrepresentative of the true quality provided. On the one hand, receiving an unfairly low rating once, might induce participants to exert more effort and receive a better rating the next time. On the o...

BACKGROUND Cell phone use behaviors are known to vary across demographic sub-groups and geographic locations. This study examined whether universal hand-held calling while driving bans were associated with lower road-side observed hand-held cell phone conversations across drivers of different ages (16-24, 25-59, ≥60 years), sexes, races (White, African American, or other), ruralities (suburban,...

reviews in many countries indicate that drivers often talk on mobile (cell) phones. studies have been done on possible effects of concurrent mobile phone use on driving performance. previous studies have found that phone talking could impairs performance on simulated or instrumented driving tasks, using such measures as reaction time, following distance, and situational awareness. most of these...