Automatic visual inspection of wire ropes is an important but challenging task, as anomalies in the rope are usually unobtrusive. Certainly, a reliable anomaly detection is essential to assure the safety of the ropes. A one-class classification approach for the automatic detection of anomalies in wire ropes is presented. Furthermore, the performance of different well-established features from t...

A special type of representation for knots and for local knot manipulations is described and used in a software tool called TOK to implement a number of algorithms on knots. Two algorithms for knot simplification are described: simulated annealing applied to the knot representation, and a “divide-simplify-join” algorithm. Both of these algorithms make use of the compact knot representation and ...

Rotational control and swing suppression of a crane suspended load model with traveling disturbance are studied. A rotational free rigid body suspended by a single rope is controlled using three inertia rotors. The end-supporting-point of the single rope is forced to be traveled as disturbance. Control angles and angular velocities are derived from measured data of fiber optic gyros installed o...

Using Monte Carlo simulations, we investigate the possibility of an orientational melting transition within a "rope" of carbon nanotubes. When twisting nanotubes bundle up during the synthesis, orientational dislocations or twistons arise from the competition between the anisotropic intertube interactions, which tend to align neighboring tubes, and the torsion rigidity that tends to keep indivi...

A 40 year old man sustained a flaccid paralysis of his right upper extremity in a water skiing accident on August 22nd, 1976. At the time of the injury the patient was being towed on water skis, when another boat cut across his tow rope. The force of the boat hitting his tow rope, combined with the wakes of both boats, caused the patient to be thrown forcefully into the air, with his right arm ...

Multi-rope elevators are widely used in modern buildings. However, problems such as vibration, noise, uneven wear of key components and shortened life caused by the distribution rope tensions still unsolved elevator industry. In order to balance different axial deformation each rope, a novel automatic equipment for rope-type (NABE-RE) is proposed this article. Simulations based on Simscape nume...

Surface wear caused by contact between crane wire rope and a pulley seriously affects the mechanical properties of rope. In this study, tribological behavior was investigated using homemade rope–pulley sliding friction test rig. Then, influence different surface on bending fatigue life samples analyzed. The results show that coefficient (COF) decreases with increasing distance. It reaches minim...

Digital avulsions and amputations are not uncommon in outdoor activities. Rope entanglement is often the cause, though specific descriptions of the mechanism of injury have not been reported. We report a common scenario where entanglement during a fall resulted in an amputation injury. Although any roping activity may cause a loop formation leading to digital entrapment and subsequent amputatio...

On the 28th November an old Mahomedan cultivator, of about 50 years, was admitted as an in-patient in the hospital with a gaping wound across the right armpit, attended with recurrent hremorrhage. The wound was produced accidentally ten days ago in the following way. Whilst leading two bullocks tied to each end of a rope, the loop of which was hanging down from his right shoulder, the animals w...

In this paper, we describe a novel camera calibration method to estimate the extrinsic parameters and the focal length of a camera by using only one single image of two coplanar circles with arbitrary radius. We consider that a method of simple operation to estimate the extrinsic parameters and the focal length of a camera is very important because in many vision based applications, the positio...