BACKGROUND Ensuring that all medical students achieve adequate clinical skills remains a challenge, yet the correct performance of clinical skills is critical for all fields of medicine. This study analyzes the influence of receiving feedback by teaching associates in the context of achieving and maintaining a level of expertise in complex head and skull examination. METHODS All third year st...

As the main part in terrestrial ecosystems, vegetation is the result of long-term effect by variety natural factors of a region. In the same climatic regions, the heterogeneity of natural conditions is small and the vegetation also has certain homogeneity. These provide us a appropriate selection to analyze the vegetation change according to unique phonological characteristics of different regi...

market crash is a phenomenon which occurs in stock markets occasionally and leads to loss of the investors’ wealth and assets in a relatively short period of time. therefore, attempts for prediction of this phenomenon are of much importance for the investors, financial institutions and government. to this date, numerous and varied studies have been carried out for predicting and modeling  stock...

in recent years, the existing competitions between investment companies have been increased largely by entering private investors in capital market. large and powerful companies try to achieve the goals predicted to increase the competition capacity. to analyze the efficiency of investment companies, parametric and non-parametric methods are used. in this research, based on the dissociation pow...

Real-time monitoring of the economy is based on activity indicators that show regular patterns such as trends, seasonality and business cycles. However, parametric non-parametric methods for signal extraction produce revisions at end sample, arrival new data makes it difficult to assess state economy. In this paper, we compare two procedures: Circulant Singular Spectral Analysis, CiSSA, a techn...

although periodontitis is a chronic inflammatory disease but some factors of acute inflammation phase are involved in this disease among which is the c-reactive protein (crp). to minimize its effects, anti-inflammatory drugs or non-pharmacological approaches such as oral hygiene is recommended. crp can also be used for the prediction and early detection of periodontal disease. the aim of the pr...