a fundamental study of scale formation of calcium carbonate (caco3) for producing oil wells hasbeen carried out. this article presents the study of the prediction of salt deposition in two differentsynthetic formation waters and investigates the effects of temperature and pressure on calciumcarbonate precipitation. the dependence of the induction period of the precipitation of calciumcarbonate ...

for better guiding a system, senior managers should have accurate information. using data envelopment analysis (dea) help managers in this objective. thus, many investigations have been made in order to find the most productive scale size (mpss) for the evaluating decision making units (dmus). in this paper we consider this case where there exist subsets of input and output variables to be inte...

this study was designed to investigate the demand for institutional credit among small scale farmers in imo state. a sample of 40 livestock and 50 food crop farmers were selected respectively using multistage random sampling technique. data were collected with a well structured questionnaire administered to a total of 90 randomly selected farmers. data collected were analyzed using descriptive ...

ontology is the main infrastructure of the semantic web which provides facilities for integration, searching and sharing of information on the web. development of ontologies as the basis of semantic web and their heterogeneities have led to the existence of ontology matching. by emerging large-scale ontologies in real domain, the ontology matching systems faced with some problem like memory con...

prediction of mechanical properties of carbon nanotube-based composite is one of the important issues which should be addressed reasonably. a proper modeling approach is a multi-scale technique starting from nano scale and lasting to macro scale passing in-between scales of micro and meso. the main goal of this research is to develop a multi-scale modeling approach to extract mechanical propert...

background: literature recommends that refractory cases with lumbar disc herniation and appropriate indications are better to be treated surgically, but do all the patients throughout the world consent to the surgery with a same disability and pain threshold? we aim to elucidate the prevalence and severity of disabilities and pain in iranian patients with lumbar disc herniation who have consent...

objective: the self-compassion scale (scs) which originally developed by neff (2003a) is based on the assumption that the self-compassion comprised by self-kindness/self-judgment, common humanity/perceived isolation, and mindfulness/over-identification. this research was aimed to confirm the six-factor structure of scs. methods: 265 university students entered the research to assess the psychom...

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...

simultaneous capillary dominated displacement of the wetting and non-wetting phases are processes of interest in many disciplines including modeling of the penetration of polluting liquids in hydrology or the secondary migration in petroleum reservoir engineering. percolation models and in particular invasion percolation is well suited to characterize the slow immiscible displacement of two flu...