background and aims: cardiac surgery patients are at high risk of pressure ulcers. in the present study, we determined the incidence of pressure ulcer in patients who were admitted to open heart cardiac surgery intensive care unit and related risk factors. methods: with using convenience sampling all the eligible patients who were admitted to boali cardiac surgery during june to august 2015 wer...

although there is enough knowledge indicating on the influence of frequency content of input motion on the deformation demand of structures, state-of-the-practice seismic studies use the intensity measures such as peak ground acceleration (pga) which are not frequency dependent. the v max/a max ratio of strong ground motions can be used in seismic hazard studies as the representative of frequen...

the present sought to draw a comparison between model predictive control performance and two other controllers named simple pi and selective pi in controlling large-scale natural gas transport networks. a nonlinear dynamic model of representative gas pipeline was derived from pipeline governing rules and simulated in simulink® environment of matlab®. control schemes were designed to provide a s...

assessing seismic hazards involves specifying the likelihood, magnitude and location of earthquakes in a region. predicting the seismic hazards is the first step in reducing the impact of the damage caused by an earthquake.  in this study, to fully utilize all the known parameters which may possibly affect the occurrence of earthquakes (mb ≥ 4.5); a data-driven rule-extraction method called the...

early screening of autism increases the chance of receiving timely intervention. using the parent report questionnaires is effective in screening autism. the q-chat is a new instrument that has shown several advantages than other screening tools. because there is no adequate tool for the early screening of autistic traits in iranian children, we aimed to investigate the adequacy of the persian ...

background: our aim was to investigate the effects of clinical application of perioperative predictive nursing on reducing psychiatric complications in intensive care unit (icu) patients after neurosurgery. methods: a total of 129 patients who underwent neurosurgery and received intensive care were enrolled in our study from february 2013 to february 2014. these patients were divided into two g...

black zira (bunium persicum) is a medicinal plant and spice, naturally grows in iran. the aim of this study was to investigate the combined effects of different concentrations of bunium persicum essential oil (eo; including 0, 0.08, 0.16 and 0.24%), three incubation temperatures (15, 25 and 35˚c), three levels of ph (5, 6 and 7 adjusted by hydrochloric acid), and three inoculum size (102, 103 a...

the control of fluidized-bed operations processes is still one of the major areas of research due to the complexity of the process and the inherent nonlinearity and varying dynamics involved in its operation. there are varieties of problems in chemical engineering that can be formulated as nonlinear programming (nlps). the quality of the developed solution significantly affects the performance ...

laguerre function has many advantages such as good approximation capability for different systems, low computational complexity and the facility of on-line parameter identification. therefore, it is widely adopted for complex industrial process control. in this work, laguerre function based adaptive model predictive control algorithm (ampc) was implemented to control continuous stirred tank rea...

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