The dead-end depth of an element g of a group with finite generating set A is the distance from g to the complement of the radius dA(1, g) closed ball, in the word metric dA. We exhibit a finitely presented group K with two finite generating sets A and B such that dead-end depth is unbounded on K with respect to A but is bounded above by three with respect to B.

In this issue, Lockey et al. from London’s Air Ambulance present heir concept of a common algorithm for effective management f traumatic cardiac arrest, including resuscitative thoracotomy n penetrating chest injuries.1 According to the authors, the algoithm does not necessarily distinguish between prehospital and n-hospital care. However, their approach of delivering resuscitaive thoracotomy b...

Idiopathic outflow tract ventricular arrhythmias (VAs) represent a significant proportion of all VAs. The mechanism is thought to be catecholamine-mediated delayed after depolarizations and triggered activity, although other etiologies should be considered. In the adult cardiac conduction system it has been demonstrated that sometimes an embryonic branch, the so-called "dead-end tract", persist...

With the ever rising amount and quality of malicious software for mobile phones, multiple ways to detect such threats are desirable. Next to classical approaches such as dynamic and static analysis, the idea of detecting malicious activities based on the energy consumption introduced by them was recently proposed by several researchers. The key idea behind this kind of detection is the fact tha...

The dead-end elimination theorem has proved to be a powerful method to reduce the theoretically accessible conformational space when modeling protein side chains by using a rotameric representation of possible conformations. In this work, theoretical details about variants to the original criterion are discussed. We also provide information on how the equations can be algorithmically implemente...

the conditions for the refinement of clarified sugarcane juice, including temperature (50o, 60o and 70oc) and pressure (0, 0.5, 1 and 1.5 bars) by micro-filtration membrane technology were investigated. the raw sugarcane juice was initially pre-filtrated with lime and then the juice obtained (clarified juice) processed using a ceramic micro-filter mem-brane (0.2 micrometer). the characteristics...

powerful impact on survival than most treatments [7]. On the other hand, the study presented here has important limitations and several of the investigator’s statements are quite disputable. To start with, and strictly speaking, the authors are not in a position to conclude that ‘there was no increase in overall survival with weekly paclitaxel’. The study was not powered sufficiently to demonst...

Numerous species of solitary bees and wasps build linear nests with only one entrance. Developing insects must orient themselves inside their nest to choose the correct direction in which to emerge. Misorientation and chewing towards the dead end of the nest can result in significant mortality. Most insects position themselves towards the nest entrance during cocoon construction; however, some ...

Very high-pressure gas compressors have been utilized to compress inert gases, liquids, and combustible gaseous mixtures for various industrial applications, e.g., hot isostatic presses and waterjet cuning. In order to design reliable and efficient very high-pressure gas compressors, the compression processes must be fully understood. In this study a numerical simulation of the gas-dyn:tmic and...

The dead-end depth of an element g of a group with finite generating set A is the distance from g to the complement of the radius dA(1, g) closed ball, in the word metric dA. We exhibit a finitely presented group K with two finite generating sets A and B such that dead-end depth is unbounded on K with respect to A but is at most two with respect to B. 2000 Mathematics Subject Classification: 20F65