1. STACK-BASED GENETIC PROGRAMMING Genetic Programming, or GP, has traditionally used tree-based techniques for representation and reproduction. The most widely used crossover method is subtree crossover, and the majority of the alternatives in published literature are variants thereof. However, if the trees are manipulated in their prefix or postfix form, other approaches exist that preserve t...

Conceptual design of a waste heat recovery cycle is carried out in attempt to enhance the thermal efficiency of a steam power plant. In the recovery system, super-critical an CO2 is employed as the working fluid operating in a Brayton cycle. Low grade heat rejected by the flue gases through the stack is used as the primary heat source, while a secondary heat exchanger utilizes th...

background: application noninvasive ventilation in the patients with exacerbation of chronic obstructive pulmonary disease (copd) reduced mortality. this case-control study was designed to compare efficiency and outcome of non-invasive (niv) versus invasive positive pressure ventilation (ippv) in respiratory failure due to copd methods: the patients were assigned to niv or ippv intermittantly.t...

Many low-level runtime engines and virtual machines are stack based instructions take parameters from the stack and leave their results on the stack. Stack language is a common name for several languages used to program stack based (virtual) machines like CLR, JVM, Forth, Postscript, etc. We chose the Forth language as an example to represent the class of stack languages, partially because this...

We study sorting machines consisting of a stack and a pop stack in series, with or without a queue between them. While there are, a priori, four such machines, only two are essentially different: a pop stack followed directly by a stack, and a pop stack followed by a queue and then by a stack. In the former case, we obtain complete answers for the basis and enumeration of the sortable permutati...

Operating systems for sensor networks must provide energy and memory-space efficient execution environments for applications because of the resource constraints of the sensor nodes. The shared-stack cooperative threads have been proposed to conserve stack memory-space and to minimize the possibility of stack overflow in the sensor operating systems. However, stack switching brings about externa...

Today, many general-purpose register-file (GPRF) architectures implement instructionlevel-parallelism (ILP) techniques to improve performance. Less has been done in this area for the so-called ‘stack architecture’. Nonetheless, stack architectures have many advantages over GPRF architectures. Applying ILP techniques in the stack processor domain might ultimately achieve similar, or better, perf...

conclusions according to the results of our study, neck collar fixation has no effect on ventilation in multiple trauma patients. results this study involved 163 multiple trauma patients. of these, 65% were male. the mean of end tidal carbon dioxide (etco2) of the patients without neck collars was 34.62 ± 4.46 and the mean etco2 of the patients with neck collars was 34.21 ± 2.31. there was no s...

background: endotracheal or tracheostomy tube in mechanically ventilated patients disturb verbal communication with others. therefore, patients are frustrated of requesting for their needs or problems related to artificial breathing. therefore investigating self-experiences of these patients can be applied in providing them with a better care by clinical personnel. methods: this is a qualitativ...