Intramedullary nailing is a technically demanding procedure which involves an excessive amount of x-ray acquisitions; one study lists as many as 48 to successfully complete the procedure. In this work, a novel low cost radiation-free drilling guide is designed to assist surgeons in completing the distal locking procedure without any x-ray acquisitions. Using an augmented reality fluoroscope tha...

OBJECTIVE A prospective, randomized study to compare patients with closed, multi-fragmented tibial diaphyseal fractures treated using one of two fixation methods undertaken during minimally invasive surgery: nonreamed interlocking intramedullary nails or bridging plates. MATERIALS AND METHODS Forty-five patients were studied; 22 patients were treated with bridging plates, 23 with interlocking...

When replace railway interlocking devices, setting up of large number of signal cables and confirming of wiring connections are required. So, it is worried that serious transport disorder caused by human error in wiring works would occur. We have developed a railway signal control system utilized optical LAN to reduce the signal cables and wiring works. Moreover, all signal devices operate inde...

Railway interlocking system is a safety critical system. Its failure can cause the loss of human life, severe injuries and loss of money. Therefore the complication of this type of system requires advanced methodologies, which provide complete security and quality of a system. One way of achieving this goal is by using formal methods, which are mathematically based languages, techniques and too...

This study explores the competing influences of different types of board interlocks on diffusion of a strategic initiative among a population of firms. We examine a broad social network of interlocking directors in U.S. firms over a period of 17 years and consider the likelihood that these firms will adopt a strategy of expansion into China. Results show that ties to adopters that unsuccessfull...

The Columbia Non-neutral Torus (CNT) is a tabletop (R=0.3 m, a=0.1 m, B=0.2 T) stellarator now being constructed at Columbia University. The goal of CNT is to study the equilibrium, stability, and transport of non-neutral plasmas confined on magnetic surfaces. CNT will use four circular, planar coils: two interlocking coils with a variable tilt angle, plus two additional poloidal field coils. B...

The thecosomes are a group of planktonic pteropods with thin, 1 mm-sized aragonitic shells, which are known to possess a unique helical microstructure consisting of interlocking nanofibres. Here we investigate the detailed hierarchical structural and mechanical design of the pteropod Clio pyramidata. We quantify and elucidate the macroscopic distribution of the helical structure over the entire...

In this paper, we present a technique originally developed for decomposing complex software design problems, and suggest its usefulness for exploring the structure of large, non-directed social networks . The technique, based on a high-density clustering model defined on a graph, is quite efficient on very large, relatively sparse networks and provides a convenient, two-dimensional representati...

In our Rail Human Factors approach, we define the human as the starting point for our interdisciplinary research on the design of human-machine interfaces in railway systems. One key focus of this approach is on the future workplace of the rail traffic controller. In this paper, a collaboration project between human factors scientists and trained rail traffic controllers is presented. Based on ...

This paper addresses the need to generate functionally large geometries/objects for layered manufacturing machines. Novelty is found in the translation from an initial shape in CAD to subdivision as interlocking objects that are further subdivided into slicing layers using traditional layered manufacturing software. Translation from an initial shape to individual component geometry is guided by...