The role of road-tunnel ventilation has changed during the last decades. While in former years tunnel ventilation was responsible for providing an acceptable environment for tunnel users passing through the tunnel during normal operation conditions [30], nowadays the support of rescue conditions during a fire is dominating. The introduction of the fire case into the ventilation design resulted ...

A unique single frequency, dual daisy chain tunnel radio communication system has been developed for use in our new Positron-Electron Storage Ring. Communications are possible between portables in the underground ring and between a portable in the ring and all control rooms on the site. The system is designed as a wide band facility and therefore can carry many simplex and duplex transmissions....

In this paper we focus on the design of threshold logic functions in Single Electron Tunneling (SET) technology, using the tunnel junction’s specific behavior, i.e., the ability to control the transport of individual electrons. We introduce a novel design of an n-input linear threshold gate which can accommodate both positive and negative weights and built-in signal amplification, using 1 tunne...

This paper reports on the design, construction, Instrumentation and preliminary testing performed on the high-lift wing of the MARVELETTE aircraft in a two-dimensional wind tunnel. The wind tunnel,12 feet high and 2 feet 9 inches wide,was fitted over a section of the aircraft wing to the shrouded propeller at the rear of the vehicle. When operating with this arrangement, wind tunnel velocities ...

Over the past five years the GPS Laboratory at Stanford University has developed a 3-D “Out the Window” Tunnel-in-the-Sky Display. This display intuitively and accurately renders the attitude and location of the aircraft relative to the local terrain. This paper summarizes the design, development, and implementation of the Stanford Tunnel-in-the-Sky Display from 1995 through Spring 2000. In par...

The Multicenter Anterior Cruciate Ligament (ACL) Revision Study (MARS) group was formed to study a large cohort of revision ACL reconstruction patients. The purpose of this subset analysis study of the MARS database is to describe specific details of femoral tunnel malposition and subsequent management strategies that surgeons chose in the revision setting. The design of this study is a case se...

BACKGROUND Anatomic femoral tunnel placement for single-bundle anterior cruciate ligament (ACL) reconstruction is now well accepted. The ideal location for the tibial tunnel has not been studied extensively, although some biomechanical and clinical studies suggest that placement of the tibial tunnel in the anterior part of the ACL tibial attachment site may be desirable. However, the concern fo...