Dimension reduction properties of the act-and-wait controller for systems with feedback delay are analysed. The point of the act-and-wait concept is that the feedback is switched on and off periodically. Earlier works have shown that if the switch-off (waiting) period is longer than the feedback delay, then the system can be described by an n ×n monodromy matrix with n being the dimension of th...

BACKGROUND Elective single embryo transfer (eSET) enables the prevention of multiple pregnancies after in vitro fertilization (IVF). However, in Europe, the multiple pregnancy rate after IVF remains stable at approximately 23%, with SET occurring in 15% of all IVF cycles. In most European clinics, the decision for the number of embryos transferred is established through a form of shared decisio...

Background & aim: Obsessive-Compulsive disorder is considered as one of the most common disorders in pregnancy and postpartum period. There are few studies in this regard in Iran. Therefore, the purpose of the current study was to compare the severity of obsessive-compulsive symptoms in pre-pregnancy, pregnancy, and postpartum period among women of reproductive age.<br...

In theory, the goal of marriage should be to provide a long and happy life for both husband wife, but in practice, some marriages just cannot saved end divorce. Iddah is one legal repercussions that might result from iddah requirement must fulfilled by woman; nevertheless, after time had passed, Ministry Religion's Director General Islamic Guidance published circular indicated, as rules, wait u...

BACKGROUND Uterine artery pseudoaneurysms are dangerous and can lead to severe hemorrhage. We report an uncommon cause of a giant pseudoaneurysm in a missed miscarriage in a woman with a cesarean scar pregnancy. CASE PRESENTATION The patient was a 25-year-old Chinese woman with a missed miscarriage in a cesarean scar pregnancy. Curettage was performed under ultrasound monitoring. A uterine ar...

Repair of inguinal hernias may be performed using either open surgery or laparoscopic techniques. Following surgery, a 6-wk waiting period is generally recommended before a pilot returns to active duty, including flight in high-performance aircraft. A shorter waiting period would be operationally useful and may be possible following either a trans-abdominal preperitoneal (TAPP) laparoscopic tec...

Recent research has shown that 82% of adolescent pregnancies are unintended. Social marketing has potential to reduce unintended adolescent pregnancy but its effectiveness in this area has not been thoroughly evaluated. This article reviews the literature on social marketing and assesses its potential to reduce unintended adolescent pregnancy. We identified five communication principles as rele...

We consider the classical M/G/1 queue with two priority classes and the nonpreemptive and preemptive-resume disciplines. We show that the low-priority steady-state waiting-time can be expressed as a geometric random sum of i.i.d. random variables, just like the M/G/1 FIFO waiting-time distribution. We exploit this structures to determine the asymptotic behavior of the tail probabilities. Unlike...