LEO orbit space radiations in which the protons has the main contribution, have survived devastating effects on electronic components. The damage caused by ionizing protons on the satellite electrical components in the circuit LEO moves was reviewed. By studying the LEO orbit by Shieldose software, the worst-case scenario was evaluated for a satellite. Considering the electronic components based on metal oxide semiconductor (MOS), a design for protection against TID originated from captured protons was done by MULASSIS software based on Monte Carlo calculations. Considering the weight and volume constraints, multiple layers for ionizing dose reduction were studied. Results show that a three-layer combination of shielding materials including low, high and low density materials, which simultaneously optimize the weight and volume, makes the optimum protection.

This paper presents a new wideband, low-loss and sharp rejection Band pass filter which is implemented by using broadside coupled lines and stepped-impedance open circuit stubs. It is demonstrated that using stepped impedance open stub, controllable transmission zeroes are attainable. Transmission line model for proposed structure is introduced and detailed analysis is investigated. The goals of broad pass band and sharp rejection are achieved by choosing the impedances of transmission lines properly. Designed filter operates in 2-6 GHz with low insertion loss (less than 1dB) and high rejection in out of frequency band. The theoretically predicted performance is in good agreement with experimental results.

Nowadays, most of information systems can be modeled as multilayer networks which each layer includes some nodes connected to each other by different types of links. Information diffusion in networks is the subject that researchers considered recently and they analyzed and modeled this process type in the networks. Although most of researches in this field have focused on single layer networks, but in the real world, because of the complexity of relations, most systems must be modeled as multilayer networks. In the previous works, there are much simplification in problem space, like projection all layer into one layer or negligence the mutual effect of nodes in different layers. So a new effective model for analyzing diffusion in multilayer networks is needed. This method is focused on predicting diffusion in multilayer networks, with considering mutual effect of different layers on each other. The most important specification of this proposed method, is the ability to specify power of all layers and measuring this power regardless node's similarity or difference. In fact, this model can determine the diffusion power of each type of nodes. The model is applied on two real bibliographic information networks, and experimentally demonstrated the effectiveness of this model compared with other diffusion models.

The authors discuss the technology for dual pumping technology of oil-producing wells and show its advantages and shortages. It is concluded that the simultaneous-separate oil production project proposed is economically attractive due to increment in oil production, high-income terms, and short pay-off period even in small and depleted reservoirs. Furthermore, the potential of the proposed project is evaluated in terms of the required facilities and incremental oil production. Dual pumping technology becomes of ever-more use today since the unified well-spacing pattern envisioned for multilayer field development and operation ensures the feasibility of multiple-zone production, and, as a consequence, ramp-up of reserves recovery and oil drainage amount as well. At the same time, the practicability of multiple-zone production depends on a number of fraught factors and requires thereof appropriate inventory and current status analyses to be fulfilled with regard to reserves recovery operations. As influx performance study and fluid-bearing characteristics of reservoirs are often incomplete due to field situation, the authors, therefore, follow the task to carry out an efficient analysis of multi-zone productions based on dual completion technologies.

We will present a detailed investigation of intersubband transitions process in core-multi shells quantum dots. The confined wave functions and eigenenergies of electrons in quantum dots have been calculated under the effective-mass approximation by solving a three-dimensional Schrodinger equation. Excellent dependence is found between size effects, time relaxation and degenerate four wave mixing (DFWM). We found that the enhancement of the thickness layers lead to strongly enhancement in peak value of DFWM.