I) Given a segment-cuttable polygon P drawn on a planar piece of material Q, we show how to cut P out of Q by a (short) segment saw with a total length of the cuts no more than 2.5 times the optimal. We revise the algorithm of Demaine et al. (2001) so as to achieve this ratio. (II) We prove that any collection R of n disjoint1 axis-parallel rectangles drawn on a planar piece of material Q is cu...

Correctly selecting a saw for a job is one of the most critical decisions a sawmiller has to make. Even after the selection is made, the saw must be set up and operated within certain specifications for balanced performance. An understanding of the interrelationship of raw materials, end products, machinery, and the sawing process itself is essential. Often sawmillers operate their saws with le...

Abstract Based on the requirement of flexible electronic devices (FED)such as surface acoustic wave (SAW) sensors, finite element models for material analysis and SAW resonator design were established. Dual-mode Rayleigh Horizontal Shear mode 0ºY cut LiNbO 3 thin film was discovered. The influence BCB thickness PI substrate resonant analyzed. owned high sensitivity both in shear under tensile s...

The formation of fault damage due to slip under high normal stresses can rarely be monitored under in situ conditions. To advance our understanding of microfracture processes, we investigated stick-slip events on Westerly granite samples containing the following: (1) a planar saw cut fault and (2) a fault developed from a fresh fracture surface. We examined temporal changes of seismic moment te...

In lecture 19, we saw an LP relaxation based algorithm to solve the sparsest cut problem with an approximation guarantee of O(logn). In this lecture, we will show that the integrality gap of the LP relaxation is O(logn) and hence this is the best approximation factor one can get via the LP relaxation. We will also start developing an SDP relaxation based algorithm which provides an O( √ log n) ...

Abstract The subject of this paper is the analysis influence laser cutting oak wood on its drying process. research was comparison process and quality dried in samples cut by classical technology (sawing) with use laser. carried out two sets which were subjected to an identical Continuous moisture loss final attained, gradients before after drying, internal tensions monitored means fork test cu...

IN RECENT YEARS A NUMBER OF HISTORIANS have been at pains to point out that the patterns and nature of public disorders in eighteenth-century Ireland are largely comparable with those that existed elsewhere in contemporary Western Europe. Irish riots and popular protests, it has been suggested, saw ‘a controlled and discriminating use of violence’, and were characterised by their ‘defensive, ri...

OBJECT The object of this study was to propose an alternative procedure to the classic decompressive hemicraniectomy using an "in-window" craniotomy and a "bridgelike" duraplasty. METHODS The authors performed a large, almost rectangular craniotomy involving the frontal, temporal, and parietal bones and part of the occipital squama in 5 patients. The dura mater is opened and its area is enlar...

In machining of Ti-6Al-4V alloy, the formation of saw tooth chips takes place at relatively low cutting speeds in comparison to other materials such as hardened steels. Study of chip morphology is important to understand the cutting force variation, surface integrity and chip breakability of the alloy. In this work, an attempt has been made to study the effect of cutting speed, feed rate and de...