in this study, he’s variational approach (va) is used to solve the non-naturalvibrations and oscillations. the method works very well for the whole range of initial amplitudesand does not demand small perturbation. it is also sufficiently accurate to both linear and nonlinearphysics and engineering problems. we consider some examples to illustrate the effectiveness andconvenience of the method....

Main Text We read with great interest the analysis by Smith et al. [1] on the correlation between duration of veno-arterial extracorporeal life support (VA-ECMO) and outcomes, using data from the extracorporeal life support organization (ELSO). We note their finding that decannulation at day four of VA-ECMO is associated with the highest percentage of patients surviving. While this is the large...

this article is concerned with a comparative review of jahân-nâme   by mohammad bin najib bakran and manuscripts of masâlek va mamâlek by abu al-hasan sâʽid bin ali jurjâni written by during the middle of ninth century ah. from this review it becomes clear that jorjâniʼs main source in writing his book was jahân-nâme and therefore jahân-nâme is also a good source for editing the masâlek.  howev...

In This Issue In This Issue Initiate then elongate tudies on yeast have provided significant insights into eukaryotic DNA replication, but it has been difficult to examine the process in more complex organisms. On page 225, Claycomb et al. have taken advantage of a peculiar aspect of insect biology to develop a new model for studying metazoan DNA replication, and have already made one surprisin...

Recently, Revista Española de Cardiologı́a published a special article entitled ‘‘Guı́a europea sobre prevención de la enfermedad cardiovascular en la práctica clı́nica (versión 2012)’’ which was translated from the original (‘‘European Guidelines on Cardiovascular Disease Prevention in Clinical Practice [Version 2012]’’), published by the European Heart Journal. As in previous versions, these gui...

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