BACKGROUND Recent studies have emphasized the importance of anatomic tunnel placement during anterior cruciate ligament (ACL) reconstruction in an effort to restore normal knee kinematics and stability. Secondary to the constraints imposed by a coupled drilling technique, the ability to achieve an anatomic femoral tunnel during transtibial hamstring ACL reconstruction may be limited. HYPOTHES...

Contents i 1 Introduction 1.1 Examples of fluid & flexible structure interaction 1 1.2 Current design practises and wind tunnel testing 2

BACKGROUND The double-bundle technique has recently gained much interest in ligament reconstruction. In addition to potential kinematic advantages, perhaps double tunnels have the potential for faster and more secure tendon-to-bone healing. HYPOTHESIS Placement of tendons in 2 osseous tunnels, as opposed to 1, will enhance tendon fixation as determined biomechanically and histologically. ST...

The tunnel restoration has been suggested as a conservative alternative to the conventional box preparation for treating proximal caries. The main advantage of tunnel restoration over the conventional box or slot preparation includes being more conservative and increasing tooth integrity and strength by preserving the marginal ridge. However, tunnel restoration is technique-sensitive and can be...

This paper presents a novel design of a four-legged “spider” robot capable of moving in a wide range of two-dimensional tunnels. The robot moves in a quasistatic manner, by stably bracing itself against the tunnel walls while moving its free parts to the next position. The design has been strongly influenced by the recent immobilization theory of Rimon and Burdick (1998a, 1998b). The theory dic...

This paper reviews the remarkable developments of the magnetic tunnel junction over the last decade and in particular, work aimed at demonstrating its potential for a dense, fast, and nonvolatile random access memory. The initial focus is on the technological roots of the magnetic tunnel junction, and then on the recent progress made with engineered materials for this device. Following that, we...

OBJECTIVE To assess flow dynamics after total cavopulmonary connection (TCPC). DESIGN Cross-sectional study. SETTING Aarhus University Hospital. PATIENTS Seven patients (mean age 9 (4-18) years) who had previously undergone a lateral tunnel TCPC mean 2 (0. 3-5) years earlier. INTERVENTIONS Pressure recordings (cardiac catheterisation), flow volume, and temporal changes of flow in the la...

With a length of more than 55 km, the Brenner Base Tunnel (BBT) connecting Austria and Italy will be one of the world’s very long tunnels in the future. During the construction phase, climatic conditions need to be maintained fulfilling the occupational health requirements, assuring the functionality of the machinery and allowing the intended construction processes. In view of the extended cons...

This report describes the formulation of a model of the dynamic behavior of the Benchmark Active Controls Technology (BACT) wind tunnel model for active control design and analysis applications. The model is formed by combining the equations of motion for the BACT wind tunnel model with actuator models and a model of wind tunnel turbulence. The primary focus of this report is the development of...

BACKGROUND Mini-open carpal tunnel release has become increasingly popular for the treatment of carpal tunnel surgery. The main advantages are shortening recovery time and return-to-work time. However, the risk of neurovascular injury still remains worrisome. METHODS In this study, we developed a new retractor (herein called the PSU retractor) modified from the widely used Senn retractor, wit...