Traditional biped walkers based on passive dynamic walking usually have flat or circular feet. This foot contact may be modelled with an effective rocker represented as a roll-over shape to describe the function of the knee-ankle-foot complex in human ambulation. Mahmoodi et al. [1] has modelled this roll-over shape as a discretized set of pivot points. In this paper, Lagrangian mechanics are u...

Recent developments in fly-by-wire control architectures for rotorcraft have introduced new interest in the identification of time-varying pilot control behavior in multi-axis control tasks. In this paper a maximum likelihood estimation method is used to estimate the parameters of a pilot model with time-dependent sigmoid functions to characterize timevarying human control behavior. An experime...

The ROCK & ROLL deductive object-oriented database system has been used to develop applications that involve the querying and manipulation of spatial data. The approach to the development of these applications has hitherto required that a suitable set of spatial data types is deened and handed over to applications as a class library for reuse. While this approach is functionally adequate, it le...

The positions of both eyes were measured objectively in the dark following "look straight ahead" instructions for 16 subjects at 27 combinations of static pitch and roll postures over 360 degrees of space, using an infrared video technique. Shifts in vertical version, or the doll reflex, varied sinusoidally with pitch and roll angle. At 0 degree roll, the average response has a peak-to-trough a...

For the Rayleigh-number range 10 Ra 10 we report measurements of the Nusselt number Nu and of properties of the large-scale circulation (LSC) for cylindrical samples of helium gas (Prandtl number Pr=0.674) that have aspect ratio Γ ≡D/L=0.50 (D and L are the diameter and the height respectively) and are heated from below. The results for Nu are consistent with recent direct numerical simulations...

cage roll forming is one of the new methods of cold roll forming process which is widely used for producing erw pipes. in addition to less production cost and time, using cage roll forming provides smooth deformation on the strip. few studies can be found about cage roll forming because of its complexity, and the available knowledge is more experience-based and not science-based. in this paper,...

This paper presents three cases of peri-implant mucosal defects that were successfully treated with a newly proposed "pouch roll" implant soft tissue augmentation technique. This procedure uses a de-epithelialized connective tissue layer during the first or second stage of implant surgery over the underlying dental implant without the need for sutures. At 2 weeks, healing was remarkable, with e...

The roll-out of the high speed train (HST) in China during the past decade o ers travelers a realistic choice of rail versus air on overlapping routes. While the HST competes for tra c it also feeds tra c to the non-overlapping air routes that are connected to the HST network. This paper analyzes the impact of HST roll-out on air carriers' route network decisions. Using a unique hand-collected ...

We present the design of a concentric tube (CT) reactor for roll-to-roll chemical vapor deposition (CVD) on flexible substrates, and its application to continuous production of graphene on copper foil. In the CTCVD reactor, the thin foil substrate is helically wrapped around the inner tube, and translates through the gap between the concentric tubes. We use a bench-scale prototype machine to sy...