There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Elements Of X Ray Diffraction

A communication infrastructure is an essential part to the success of the emerging smart grid. A scalable and pervasive communication infrastructure is crucial in both construction and operation of a smart grid. In this paper, we present the background and motivation of communication infrastructures in smart grid systems. We also summarize major requirements that smart grid communications must meet. From the experience of several industrial trials on smart grid with communication infrastructures, we expect that the traditional carbon fuel based power plants can cooperate with emerging distributed renewable energy such as wind, solar, etc, to reduce the carbon fuel consumption and consequent green house gas such as carbon dioxide emission. The consumers can minimize their expense on energy by adjusting their intelligent home appliance operations to avoid the peak hours and utilize the renewable energy instead. We further explore the challenges for a communication infrastructure as the part of a complex smart grid system. Since a smart grid system might have over millions of consumers and devices, the demand of its reliability and security is extremely critical. Through a communication infrastructure, a smart grid can improve power reliability and quality to eliminate electricity blackout. Security is a challenging issue since the on-going smart grid systems facing increasing vulnerabilities as more and more automation, remote monitoring/controlling and supervision entities are interconnected.

https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1315&context=electricalengineeringfacpub

A Survey on Smart Grid CommunicationInfrastructures: Motivations, Requirements andChallenges

Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications. By Christophe Caloz and Tatsuo Itoh.

A Machine-Learning Approach to Phishing Detection and Defense

This present work is an extensive effort to report the key role of indispensable technical challenges in the sensing performance of an embedded nanogap SiGe source dielectric-modulated tunnel field effect transistor (SGS-DM-TFET) biosensor during the conjugation of biological samples for the first time. In order to reach high and brilliant insights into the different design considerations impacting on the sensing performance of the biosensor under the study, two key issues in terms of process-related issue and real-time-related issues covering biomolecules manners in the nanogap cavity of the biosensor have been comprehensively studied through extensive numerical simulation. Investigations in this work revealed that the SGS-DM-TFET biosensor must be truly configured for working in realistic conditions. The obtained results give us a useful guideline for sensing the biomolecules samples in the real conditions including low coverage percentage of biological samples, charge effect, and discrete probe position with the help of SGS-DM-TFET biosensor while keeping the high sensitivity.

Profound analysis on sensing performance of Nanogap SiGe source DM-TFET biosensor

A cost-efficient, time-saving and effective technique for the fabrication of D-shaped fibers is presented, to provide a platform with a strong evanescent field to be used as a saturable absorber (SA). This technique provides flexibility by removing the required portion of the fiber, and a small polished length which offers a unique opportunity to deposit SA on its surface by simply submerging it in the SA solution without high losses. A compact fiber laser utilizing a graphene oxide coating on a fabricated D-shaped fiber as an SA capable of generating ultrashort pulses is designed and verified. We report the generation of ultrafast pulses as short as 227 fs with a 34.7 MHz repetition rate, having a 3 dB bandwidth of 14 nm at the 1570 nm center wavelength.

https://iopscience.iop.org/article/10.1088/1612-202X/aa7729/pdf

Novel D-shaped fiber fabrication method for saturable absorber application in the generation of ultra-short pulses

An optical add-drop filter system is used to generate ultra-short nanometer (nm) bandwidth soliton pulses to be transmitted along the nano communication nonlinear fiber optics. In order to reduce the loss during the transmission, ultra-short soliton pulses are recommended. The theoretical part of this study uses the Z-transform method to present the characteristic transmission of the optical add-drop filter system. The nonlinear refractive index of the fiber optic transmission link is 2.6×10-20 m2/W. The Wavelength Division Multiplexing (WDM) can be performed to enhance the capacity of the system. This occurs when the bigger size of the ring resonator is used. Here, soliton pulses with bandwidths of 2.1 and 0.42 nm are generated and transmitted over the fiber optic length, where signals with a bandwidth of 55 and 200 ps are successfully detected at the end of the transmission link.

Nanometer bandwidth soliton generation and experimental transmission within nonlinear fiber optics using an add-drop filter system

We suggest a new purpose of a security scheme by employing the nonlinear behaviors of temporal dark and bright solitons amongst a micro-ring resonator system for signal security application. The chaotic signal is generated, where the required bright soliton pulse can be recovered and discovered by an add/drop filtering device. By using the reserve ring parameters, simulation results obtained have demonstrated that the soliton conversion can be performed. In application, the chaotic signal is generated and formed by the dark soliton inside a nonlinear micro-ring device. The different temporal soliton response time can be seen, the response times of 169 and 84 ns are mentioned for temporal dark and bright solitons, respectively, which can also be used to figure the security key. The technique of optical conversion can be use to improve the optical communication network systems. Keyword: microring resonator, nonlinear medium, chaotic signals, add/drop filter, dark-bright conversion

https://www.iosrjournals.org/iosr-jap/papers/Vol2-issue1/J0214448.pdf

Iraj Sadegh Amiri

Papers

A Machine-Learning Approach to Phishing Detection and Defense

Profound analysis on sensing performance of Nanogap SiGe source DM-TFET biosensor

Novel D-shaped fiber fabrication method for saturable absorber application in the generation of ultra-short pulses

Nanometer bandwidth soliton generation and experimental transmission within nonlinear fiber optics using an add-drop filter system

Dark-Bright Solitons Conversion System for Secured and Long Distance Optical Communication