نشریه مهندسی مخابرات جنوب
پیاپی 29 (پاییز 1397)

Chip communication, including short correlation, multi-dominant, critical delay correlation, synchronization messages, long data transmission, single format with sensitive passability; Limits the power efficiency and performance of multi-core multi-processor systems. This paper deals with a low-power, high-performance nano-photonic chip network compatible with CMOS; This category is called Iris. The Iris subnet, which is based on linear waveguides and is optimized for throughput and connected in orbit, supports data transmission with sensitive throughput. Also, the Iris subnet, which operates on a surface (two-way) waveguide as well as WDm and has several broad domains, improves critical latency traffic and supports orbital communications. Overall, the proposed design offers a chip connection with high power efficiency, low latency and excellent throughput.

In the daily life of man today, the advancement of technology and industry has exposed him to magnetic and electromagnetic fields, which are likely to have serious negative effects on human health. The aim of this laboratory study was to investigate the effect of 8 mT Tesla electromagnetic field (50 Hz) on memory retrieval (memory) in mice. For this purpose, adult male and female NMRI mice were randomly assigned to experimental and control groups. Passive descent avoidance method was used to test memory 24 hours after training. The results showed that 90 minutes before the reminder had a significant effect on remembering information in male mice, but was not effective in female mice.

Today, space technology is recognized as one of the competitive fields among countries and the various achievements of space technology are an accurate basis for comparing countries in terms of industrial development. In the near future, nanosatellites will become the main trend in the development of regional terrestrial monitoring and positioning. The turnover of a satellite is millions of dollars, so a significant part of each country's investment is in the aerospace sector, and in the event of failure, a large cost will be imposed on the manufacturer. For this reason, before launching a satellite, considerations are made so that the satellites can perform the assigned operations without the slightest error. Until now, the use of microelectronic circuits has been common in space applications due to their advantages, including availability and reconfigurability, but these components are vulnerable to the radiation environment. On the other hand, due to the rapid changes in electronics to nanotechnology and the advantages of nanoelectronic circuits, in the not too distant future, nanoelectronics components will be a viable alternative in space applications. As the size of the components decreases, the orbits become more sensitive and the quantum circuits become more vulnerable to radiation from space. In this paper, we present the method of increasing the fault tolerance and their simulation in the binary wire of nanosatellites in quantum cellular automation technology.

In this paper, a wired antenna with a new structure for the central frequency of 15 MHz is designed and simulated. In addition to being shorter than the wavelength, this antenna has a high radiant resistance and low imaginary resistance compared to a unipolar antenna of equal length. Also, for high efficiency and maximum bandwidth in the frequency range of 10 to 25 MHz, the dimensions of the antenna have been optimized.  S-NEC software is used to design and simulate this antenna, which is one of the specialized software in this field. It is also possible to increase the dimensions of the antenna by a certain ratio, for example 1000, and therefore the operating frequency of the antenna decreases by the same ratio, such antennas that work in the VLF band are used for special purposes.

This paper presents a new method for achieving transient stability control to solve the optimal load distribution problem by considering the transient stability constraint (TSCOPF). The novelty of this research includes the use of the equivalent single machine (SIME) method to implement and improve the two important and main parts of the TSCOPF problem. Part 1: SIME is used to analyze the transient stability of the power system. Part 2: SIME equates a multi-machine system to a single machine connected to an infinite bus (OMIB). The instability angle obtained from the equivalent OMIB angular path is used to construct the transient stability constraint. In this method, the transient stability constraint is included by SIME in each iteration of the TSCOPF method to accurately determine the dynamic behavior of the power system. Differential equations representing the dynamic behavior of system machines are decomposed into algebraic equations according to the trapezoidal rule. The proposed load distribution model is tested and analyzed on the IEEE 9-bus system (WECC).

This article describes pyroelectric sensors and describes how they work. These sensors are sensitive to temperature changes and generate pulses at the output by switching on and off the heat flux from hot objects in front of them. The advantage of pyroelectric sensors is that they are sensitive to a wide range of infrared waves and operate at ambient temperature. One of the applications of pyroelectric sensors in ground sensors is used in the control of satellites and space structures to determine the position.