today, real business cycles theory, subject reports, articles, letters thesis has many worldwide. it seems since the main point in the theory of business cycles is a true technology shocks, this theory can be considered a theory of economic boom. in other words this theory in describing the capabilities to create greater prosperity to recession and the anatomy of the business cycles is an asymm...

langerhans cell histiocytosis (lch) is a rare disorder described as three different entities including eosinophilic granulomaof bone, the hand-schuller-christian syndrome, and letterer-siwe disease. lch is currently classified into singlesystem lch, and multisystem lch. patients with single system lch have an excellent prognosis, and are mostlytreated with local therapy. multisystem lch is subd...

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since its first clinical application in early 90s, preimplantation genetic diagnosis (pgd) has became a powerful diagnostic procedure in clinical practice for avoiding the birth of an affected child as well as increasing the assisted reproductive technologies (art) outcome . the technique involves the screening of preimplantation embryos for chromosomal abnormalities in certain indications such...

One of the important factors influencing outdoor insulators performance is pollution phenomenon. The pollution, especially during humidity condition, reduces superficial resistance of insulator and lead to a flow of Leakage Currents (LC) on the insulator surface, which may result in total flashover. The LC characteristics are affected by parameters such as nature and severity of pollution. Loca...

abstract background: pressure ulcers’ treatment imposes a considerable cost on health system and patients. electrical stimulation has already been introduced as an effective method for promoting wound healing. this study was conducted to determine the impact of interferential current (if) on healing of pressure ulcers (grade1 and 2). materials and methods: in this clinical trial, 23 patients (1...

This paper proposes a novel topology of multilevel current source inverter which is suitable to apply in low/medium voltage. The proposed topology is capable of producing desirable bidirectional output current levels. Furthermore, it can employ symmetrical DC current sources as well as asymmetrical ones which is a significant advantage. Asymmetrical mode makes it possible to generate a great nu...