A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

BACKGROUND This prospective study aimed to compare clinical effects of intramedullary nailing guided by digital and conventional technologies in treatment of tibial fractures. MATERIAL AND METHODS Thirty-two patients (mean age 43 years, 18 males and 14 females) who were treated for tibial fractures from October 2010 to October 2012 were enrolled. They were sequentially randomized to receive int...

Introduction: Irregular/blocked fields are routinely used in radiotherapy. The doses of these fields are usually calculated by means of equivalent square method that is inherently prone to uncertainty. On the other hand, Clarkson’s sector integration method is a dose calculation method which offers far better accuracy in dose calculation of irregular fields. The Scatter Air Ratio (SAR) of an in...

In this paper, dynamic transient method and conventional degree-hours method (static) have been compared to estimate heating and cooling loads of building’s wall. All main wall surfaces of various orientations, i.e.South, West, East, North, and horizontal are considered in the climate of Tehran, Iran. In this study, a conventional wall structure, which is comprisedconcrete as main wall material...

I propose the purpose our concept of actual causation serves is minimizing various cost in intervention practice. Actual causation has three features: non-redundant sufficiency, continuity and abnormality; these features correspond to the minimization of exploitative cost, exploratory cost and risk cost in intervention practice. Incorporating these three features, a definition of actual causati...

background and aims: accurate and rapid diagnosis is necessary for effective control and prevention of foot-and-mouth disease (fmd). in present study, was evaluated real time reverse transcription-polymerase chain reaction (rrt-pcr) assay along with diagnostic routine methods for the detection of all seven serotypes of fmd virus (fmdv), namely o, c, a, sat1, 2, 3 and asia 1 in biological sample...

The present study investigated the possible difference between EFL teachers’ beliefs and their actual classroom practices. To this end, 210 Iranian EFL teachers (103 teachers from high schools and 107 from language institutes) participated in the study. The 45-item Likert-scale Beliefs About Language Learning Inventory (BALLI) developed originally by Horwitz, (1985) and validated by Kasraee Nej...

Computers have become a very powerful tool in our everyday lives, and is becoming a very important educational medium. This paper discusses the computer use patterns of secondary school students in Hong Kong and compare these to the figures reported in western countries. Results of two questionnaire surveys showed the growing trends of daily computer use by students, and there are also high pre...

UNLABELLED Theme: Accreditation and quality improvement. BACKGROUND The children's ER receives 50,000 patients yearly. The majority of the patients have mild discomforts. Can these patients be treated by a paediatric nurse? AIM How satisfied are the families? What is the revisiting frequency? METHODS The pilot study was performed under two weeks in October 2015. A paediatric nurse perform...