Pectus excavatum is a common thoracic deformity. The main surgical method in early years was Ravitch procedure. Due to the complexity of operation itself, it difficult ensure effect. We recently received 35-year-old male patient with When he 15 old, procedure local hospital for pectus excavatum. postoperative effect not satisfactory, and deformity became worse age. Recently, we performed anothe...

Cluster analysis may be performed when one wishes to group similar objects into a given number of clusters. Several algorithms are available in order to construct these clusters. In this talk, focus will be on the generalized k-means algorithm which has the classical k-means procedure as well as the k-medoids algorithm as particular cases. Among the outputs of these clustering techniques, a cla...

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We show that there is no batch-means estimation procedure for consistently estimating the asymptotic variance when the number of batches is held fixed as the run length increases. This result suggests that the number of batches should increase as the run length increases for sequential stopping rules based on batch means.

Impellers with concave and vertically asymmetric blades proved superior gas dispersion capabilities power consumption characteristics under gassed turbulent conditions respect to traditional flat-blade turbines in aerated fermenters. In this study, a pilot-size gas–liquid tank stirred an blade disk impeller is numerically investigated by means of Reynolds averaged two-fluid model combined simpl...

introduction: to assess the efficacy and safety of bronchial artery embolization in the treatment of massive hemoptysis.   materials and methods: a retrospective study on 46 patients (26 males and 20 females) who were referred to the razavi hospital from april 2009 to may 2012 with massive hemoptysis and had bronchial artery embolization procedures. general characteristics of the patients inclu...

rawls’ theory of justice is expressed in a constructivist procedure. he holds that his constructivist procedure is free of metaphysical presuppositions. his constructivist procedure is here pursued in three stages: (1) in a theory of justice, rawls intends to come to moral principles regarding the original position which could even result in other moral principles as well. he also asserts some ...