To prevent dissection injury when cutting strip preparations from human left ventricular papillary muscle tissue, dissections were carried out with 2,3-butanedione monoxime (30 mM) added to Krebs-Ringer solution and followed by washout with normal solution. Eleven muscle strip preparations were dissected from left ventricular papillary muscle tissue of five patients undergoing mitral valve repl...

Main subject of this thesis are approximation algorithms for scheduling and packing, two classical geometrical problems in combinatorial optimization. It is divided into three parts. In the first part we consider a generalization of the strip packing problem or geometrical cutting stock problem. In strip packing a given set of rectangles has to be placed into a strip of fixed width and infinite...

Good algorithms exist for solving the 2D rectangular strip packing problem when the objective is to minimize the amount of wasted material. However, in some applications other criteria are also important. We describe new heuristics for strip packing that optimize not only for wastage, but also for the efficient use of the cutting equipment, by minimizing the number of independent cuts required ...

T paper presents a parallel branch-and-bound method to address the two-dimensional rectangular guillotine strip cutting problem. Our paper focuses on a parallel branching schema. We present a series of computational experiments to evaluate the strength of the approach. Optimal solutions have been found for some benchmark instances that had unknown solutions until now. For many other instances, ...

An approximately 3 ram. wide strip of thin adhesive plaster is attached to one jaw of a pair of standard, fiat glass pliers in a manner shown in Fig. 1. The marked line is placed on the side opposite to the strip (Fig. 2) and the pliers closed over it with a steadily progressing pressure. The thickness of the adhesive acts as a wedge against the glass mark and effects a slow and clean break. Th...

To examine the relationships between masticatory force, electromyogram (EMG) of masticatory muscles, and jaw movement pattern, we quantitatively evaluated the effects of changing hardness of a chewing substance on these three variables. Cortically induced rhythmic jaw movements of a crescent-shaped pattern were induced by electrical stimulation of the cerebral cortical masticatory area in the a...

A synchronous-profiling, low-position-cutting, flexible-reel-belt-conveyor, low-loss soybean header was designed to address the problems of a lack harvesting machines supporting soybean-corn strip intercropping, few existing headers, and high loss rate headers. By establishing dynamic model synchronous-profiling cutting device, key structure operation parameters that affect performance synchron...

steaks with slight marbling, even when tenderness was held constant. The following research was conducted to determine sensory differences and consumer value of domestic grain-fed beef steaks compared to steaks from grass-fed beef in Australia and grain-fed beef in Cananda. Procedure Steak Preparation Fresh (unfrozen) Australian grass-fed and Canadian AAA beef strip loins (IMPS #180) were purch...

We study the strip packing problem, in which a set of two-dimensional rectangular items has to be packed in a rectangular strip of fixed width and infinite height, with the aim of minimizing the height used. The problem is important because it models a large number of real-world applications, including cutting operations where stocks of materials such as paper or wood come in large rolls and ha...

In this paper, we develop a greedy randomized adaptive search procedure (GRASP) for the constrained two-dimensional two-staged cutting stock problem. This is a special cutting problem in which the cut is performed in two phases. In the first phase, the stock rectangle is slit down its width into different vertical strips and in the second phase, each of these strips is processed to obtain the f...