In this article we build multi-objective hyperheuristics (MOHHs) using the multi-objective evolutionary algorithm NSGA-II for solving irregular 2D cutting stock problems under a bi-objective minimization schema, having a trade-off between the number of sheets used to fit a finite number of pieces and the time required to perform the placement of these pieces. We solve this problem using a multi...

It is shown how, within the framework of general relativity and without the introduction of wormholes, it is possible to modify a spacetime in a way that allows a spaceship to travel with an arbitrarily large speed. By a purely local expansion of spacetime behind the spaceship and an opposite contraction in front of it, motion faster than the speed of light as seen by observers outside the dist...

In the plan of the CHESC2001 competition [1], an hyper heuristic has been designed based on the Ant Colony Optimization method (from now ACO). According to the competition goals, the algorithm was developed with the intention to produce an independent model of the problem domain and the particular instance to be solved. This means that the hyper-heuristic is abstracted from the features of each...

“!Iyper-reduiidaiiI” robots have a very large or anfinile degree of k inemat ic redundancy. Thas paper zntrodaces a n e w generalized resolved rate technique for soli) I 11 g h ype rredun da n t m a n apulat or inverse kzne m a t i c ~ i i s i i r y a ‘backbone curve. ’ Thas method as applicahlr e v e n zn cases w h e n explzczt representataon of the hrickbone curve intransac geometry cannot be...

The purpose of the study was to compare the mobility of selected joints of the limbs in diabetic and non-diabetics subjects. One hundred subjects comprising of 50 volunteer diabetics and 50 volunteer non-diabetics subjects participated in this study. The range of motion of the shoulder, elbow, wrist, fingers, hip and knee joins were measured using a double armed simple goniometer and recorded i...

BACKGROUND Morquio A syndrome (or mucopolysaccharidosis IVa) is an ultra-rare multi-organ disease, resulting in significantly impaired functional capacity, mobility and quality of life (QoL). METHODS This patient-reported outcomes survey evaluated the global burden of Morquio A among adults (≥18 years, N = 27) and children (7-17 years, N = 36), including the impact on mobility, QoL, pain and ...

A survey of joint mobility was conducted in 295 healthy children between the ages of 5 and 10 years who attended a London primary school. Estimates of the commonly used measurements, that is passive dorsiflexion of the wirsts and ankles, passive hypertension of the elbows and knee, were too insensitive to detect any age effect. However, a method of estimating extensibility of the 5th metacarpop...

BACKGROUND Surgical treatment of long-bone metastases requires a comprehensive approach. The indications for surgery are based on the patient's general condition, type and stage of cancer, and survival time expectancy. Tumor modular endoprostheses have been increasingly used. Surgery should provide pain relief and improve the quality of life. METHODS Between 2010 and 2013, 67 patients with ma...

Twenty patients each with a fractured femoral neck had a prosthesis with a built-in ball-and-socket joint inserted. Movements at the built-in joint were compared with total hip movement immediately after operation, one month later and three months later. It was found that the built-in joint soon lost mobility and at three months was almost completely stiff. Consequently such joints cannot be ex...