background: media advertisements especially radio and tv are one of the most important and effective ways for health promotion and consumption of healthy productions worldwide. ministry of health and some other ministries in iran agreed to control and restrict the advertising of unhealthy products and services. therefore, adequate supervision and monitoring should be done in this field.  a cont...

prevalence of thyroid nodules diagnosed by ultrasonography has been reported to be high (about 50%) probably due to iodine deficiency in our region. most thyroid nodules benign but some require treatment for cosmetic reasons or subjective symptoms. the conventional method of treatment in iran is surgery. for the first time in iran, from february 2016, 50 patients with 63 nodules (solid or cysti...

The old intuitive question ”what does the machine think” at different stages of its computation is examined. Our paper is based on the formal definitions and results which are collected in the branching program theory around the intuitive question ”what does the program know about the contents of the input bits” [1],[2],[3],[4],[5]. We further develop these results above and we present a formal...

If you expect a nobel prize winner being a crank who can think of nothing but his subject, then read Roald Hoffmann's The Same and Not the Same and test your hypothesis. This book is about chemistry, to be sure – but in the broadest scope including sociology, psychology , ethics and philosophy of chemistry. 51 nice little chapters grouped in ten parts reflect on chemistry from different aspects...

This paper presents a novel Real-Time Localisation System (RTLS) based upon 2.45 GHz Surface Acoustic Wave (SAW) Radio Frequency Identification (RFID) systems. The system utilises a novel localisation method that combines the angular rotation of the RFID reader’s antenna system with the inherent Time-of-Flight (TOF) distance measurement capabilities of the SAW RFID system. The system design res...

Direct sequence spread spectrum with its inherent resistance to multipath is a promising technique for indoor wireless communication. To allow multiple users within a limited bandwidth, code division multiple access (CDMA) is needed. This correspondence analyzes the bandwidth efficiency of M-ary CDMA systems in fading multipath indoor radio channels. It is shown that M-ary signaling improves th...