The electrical connection between the load and source can be eliminated using inductive power transfer. Supplying AC Loads, such as V2G and single phase motors, is one of the many applications of IPT. To supply an AC load, the rectified output power of IPT should be delivered to an inverter. The sequential dc/ac/dc/ac conversions cause IPT efficiency decreases. To make an output AC voltage with acceptable THD, the carrier FREQUENCY of the PWM method should be several times the reference FREQUENCY which increases the switching loss. In this paper based on IPT gain-FREQUENCY characteristics, a new pulse FREQUENCY waveform synthesizing method (PFWS) has been presented. This method eliminates secondary inverter switching losses. It is shown that besides loss reduction, synthesized sinusoidal waveform at secondary of IPT, causes the Total Switching Device Power (TSDP) of secondary converters decrease, therefore their lifetime increase. Simulated and experimental results of the developed laboratory model which verify and illustrate the operation of the proposed method are presented.

Background: Tympanometry is one of the most important audio logical tests for the assessment of neonatal hearing screening programs. This test is usually done using a 226 Hertz probe tone; however, in infants less than 6 months of age, using this probe tone FREQUENCY is not reliable due to the different characteristics of the middle ear compared to adults. The purpose of this study was to assess the obtained tympanometric data in neonates 1 to 14 days with normal hearing using 226, 678, 800 and 1000 Hertz FREQUENCY probes tones.Materials and Methods: In this cross-sectional study, 30 neonates aged 1 to 14 days who were diagnosed as normal in hearing aspect with using otoacoustic emissions test, were assessed by tympanometry. Tympanometric tests were performed using 226, 678, 800 and 1000 Hertz FREQUENCY probe tones for both ears. For data analysis, the T-paired method has been used.Results: With using 226 Hertz FREQUENCY probe tone, incidence of unusual double peak tympanograms was observed in 65% of cases, which with increasing FREQUENCY of the probe tone, this percentage was decreased. There was also a statistically significant difference between the static admittance peak compensated in two 226 and 1000 Hertz FREQUENCY probes tones.Conclusion: In neonates with normal hearing and without any risk factors for hearing loss, the 1000-Hertz Tympanogram shows a better middle ear status than the 226-Hertz tympanogram.

Background and Aim: Tinea capitis is one of the most common fungal infections in dermatology. Although the new medications and development in social health have reduced its incidence, it is still common in Iran, especially in rural areas. The aim of this study was to describe the FREQUENCY of complications of kerion.Methods: Eighteen affected patients, who were hospitalized in dermatology ward because of kerion, in a 10-year period, were revisited and according to their medical documents, data collection forms were filled.Results: 61.1% of the patients were younger than 10 years of age and 77.7% were male. The mean disease duration from the onset of symptoms to the time of correct diagnosis and management was 16.9 days. The FREQUENCY of scar and alopecia was equal in all groups and occurred in 100% of patients. Two patients also suffered from isolation due to scarring alopecia. Various types of medications, made no difference in the prognosis and resultant scarring alopecia.Conclusion: The FREQUENCY and types of sequela showed no relationship with age, type of medication and duration from the onset of disease and correct management. Scar and alopecia occurred in all patients. Further investigations on the new treatment modalities are required to reduce scar formation.

This paper presents an optimal method of FREQUENCY load shedding (UFLS) based on the rate of change of FREQUENCY of load (ROCOFL) in islanded distribution networks (DN). The proposed method minimizes the average amount of penalties paid by the independent operator of the network by utilizing the relevant cost function. The function of islanded distribution network occurs after an error in the sub-transmission network and separation from the upstream network, in an emergency condition, is one of the most important facts that has been recently addressed. The use of installed intelligent equipment to measure and send information, related to power, FREQUENCY, FREQUENCY changes, voltage range, and condition of generator switches makes it possible to provide an appropriate protection for the islanded networks. The under FREQUENCY load shedding is used to improve the network FREQUENCY due to the imbalance in the network. In this paper, it is tried to use the two proposed control modules to eliminate the optimal load with the consideration of the minimum penalty. The method presented in this paper is evaluated in the sample network of 14-bus Danish distribution network.

Today, technologies based on IoT are growing in many industrial areas. One of the most Fundamental technologies in IoT devices is RFID industry that has been widespread in many other fields of technology. RFID tags are used from supply chain to security issues and electronic passports. Cellular phones can play a significant role in the area of mobile advertising and they can operate as advertisement receivers from RFID tags that have been installed on objects in the environment. However, due to lower costs of this new advertising technology, advertisements in this channel will be more widespread; and then we would have a new portal for spams. The purpose of this article is suggesting a framework for advertising to smart mobile devices on IoT while preventing spam in ad-box. Framework and protocols expressed in this article have introduced a new generation of Mobile Advertising for which we call “ Intelligent Mobile Advertising” or IM-Advertising. Unlike other spam prevention solutions that are used in other portals such as e-mail, our solution will power Ads and also it captures customer attention in an intelligent style. The Customer will only receive the ads which he specified, by type and benefits, and other ads will not enter his smart mobile system as spams. Also our suggested solution would not need any spam detection system and it is based on a fully legal framework. It makes our customer interested and at the same time collects valuable marketing information.

The sonochemical activity of an oxygen bubble formed in an aqueous medium and oscillating under a dual-FREQUENCY excitation is studied in this paper. Several couples of frequencies are formed amongst 35, 140, 300, and 515 kHz, with a maximum acoustic amplitude of 1. 5 atm. The molar yields of the emerging oxidants are analyzed in accordance with the combined frequencies and compared to the cases of mono-FREQUENCY excitations of similar maximum amplitude, i. e., 1. 5 atm. Qualitatively, passing from a mono to a dual-FREQUENCY excitation demonstrated to be with no effect on the predominant species which remain 𝐻 𝑂 • , 𝐻 𝑂 2• , 𝑂 and 𝑂 3. However, the results exhibited a very selective quantitative evolution depending on the combined frequencies. Some couples proved to induce a negative effect and reduce the production at the single bubble level, particularly with basic frequencies of 140 and 300 kHz, while some others demonstrated a noticeable enhancement such as the couples (35, 140 kHz) and (515, 35 kHz), as compared to mono-FREQUENCY fields.

In this paper we propose a new space diversity scheme for broadband PLC systems using orthogonal space-time block coding (OSTBC) transmission combined with single-carrier FREQUENCY-domain equalization (SC-FDE). To apply this diversity technique to PLC channels, we first propose a new technique for combining SC-FDE with OSTBCs applicable to all dispersive multipath channels impaired by impulsive noise. The proposed technique is then applied to indoor and outdoor PLC channels under different channel scenarios in the presence of background and impulsive noises. We perform the simulations for SISO, MISO and MIMO configurations and show that a significant SNR gain is achieved when SC-FDE is combined with diversity techniques. We also compare our proposed technique with OFDM using Alamouti code for broadband PLC and show the superiority of our technique.

In this paper, a cooperative algorithm to improve the orthogonal space-timeFREQUENCY block codes (OSTFBC) in FREQUENCY selective channels for2 ´ 1, 2 ´ 2, 4 ´1, 4 ´ 2 MIMO-OFDM systems, is presented. The algorithm of three node, a source node, a relay node and a destination node is formed, and is implemented in two stages.During the first stage, the destination and the relay antennas receive the symbols sent by the source antennas. The destination node and the relay node obtain the decision variables employing time-space-FREQUENCY decoding process by the received signals. During the second stage, the relay node transmits decision variables to the destination node. Due to the increasing diversity in the proposed algorithm, decision variables in the destination node are increased to improve system performance. The bit error rate of the proposed algorithm at high SNR is estimated by considering the BPSK modulation. The simulation results show that cooperative orthogonal space-time-FREQUENCY block coding, improves system performance and reduces the BER in a FREQUENCY selective channel.

According to high costs of phase shifters in antenna arrays, new methods for beam steering without phase shifter are introduced. FREQUENCY Diverse Array (FDA) concept is another approach to beam steering problem. In this structure, the subsequent antenna elements are fed with stepped discrete frequencies causing continuous scanning of space in time. So a range-angle dependent scanning is made possible. There are several ways to implement, which the simplest of them is using Linear FREQUENCY Modulated Continuous Wave (LFMCW) source. In this paper, a new implementation scheme is proposed and analyzed where a Square FREQUENCY Modulated Continuous Wave (SFMCW) source is used for feeding a special beam forming network. Also radiation pattern of SFMCW and LFMCW was compared.