background: undescended testis (udt) is the most common endocrine disorder in male children. delayed diagnosis and treatment of udt lead to complications such as infertility, malignancy and testis rotation. objective: the aim of this study was to evaluate the causes of delay in proper treatment of patients with undescended testis in our population. materials and methods: an observational, descr...

The paper is concerned with robust stability criteria for Takagi- Sugeno (T-S) fuzzy systems with distributed delays and time delay in the leakage term. By exploiting a model transformation, the system is converted to one of the neutral delay system. Global robust stability result is proposed by a new Lyapunov-Krasovskii functional which takes into account the range of delay and by making use o...

in this paper a new method is introduced and investigated for removing the destabilizing effects of time-delay parameter in control loops. the concept of the method is taken from the knowledge concerning the dynamic behaviour of irrational transfer functions (ir-tf), which is discussed and investigated elswhere in frequency response domain and is explained briefly here. ir-tfs, which are well c...

Introduction: Acute myocardial infarction is one of the major causes of mortality in developing countries such as Iran. One of the most important progresses in acute myocardial infarction is early administration of therombolytic agents such as streptokinase. This study was performed to determine the time interval from patients’ referral to the emergency wards to the introduction of thrombolytic...