This paper focuses on the grid-connected photovoltaic (PV) systems and their impact on the voltage stability of the power system. The modeling of the PV systems for the voltage stability analysis is presented. The impact of a large penetration of PV generation on the voltage stability is examined through numerical simulations conducted on the IEEJ West 10-machine test system. Several of interes...

Objective: This study aims to analyze the effectiveness of internet-based, free Teachable Machine (TM) platform, which does not entail code knowledge, in detecting presence and types strabismus optimum hyperparameters. Material Methods: The images obtained from patients who presented our clinic with complaint ocular deviation were analyzed, 523 [176 esotropia (ET), 195 exotropia (XT), 152 ortho...

Recently, there has been a great deal of remarkable interest in finding bioactive compounds from nutritional foods to replace synthetic compounds. In particular, ortho-dihydroxyisoflavones and glycitein are of growing scientific interest owing to their attractive biological properties. In this study, 7,8-ortho-dihydroxyisoflavone, 6,7-ortho-dihydroxyisoflavone, 3',4'-ortho-dihydroxyisoflavone a...

This work presents a novel wound rotor synchronous machine with dampers with dual three-phase open-end stator windings. The aim of the proposed machine is to improve the power segmentation and the availability of the drive system. The mathematical model of this machine is presented in the Park reference frame. This machine is supplied by four 2-level inverters, where each inverter is dimensione...

In this paper an attempt has beenmade to investigate the transient stability enhancement of both SMIB and Multi-machine system using UPFC controller tuned by Particle Swarm Optimization. Power injection modelfor a series voltage source of UPFC has been implemented to replace UPFC by equivalent admittance. The admittance matrix of the power system is then modified according to the power injectio...

We study orthogonal drawings of 4-planar graphs on cylinders—so called ortho-radial drawings. Equivalently these can be regarded as drawings on an ortho-radial grid formed by concentric circles and rays from the center of these circles but excluding the center itself. Ortho-radial drawings form a proper extension of orthogonal drawings in the plane. We present ortho-radial representations as a ...

Silicon (Si) is the most abundant element present in the Earth's crust besides oxygen. However, the exact biological roles of silicon remain unknown. Moreover, the ortho-silicic acid (H4SiO4), as a major form of bioavailable silicon for both humans and animals, has not been given adequate attention so far. Silicon has already been associated with bone mineralization, collagen synthesis, skin, h...

PURPOSES The aim of this study was to analyse clinical data of children undergoing orthokeratology (ortho-k) and to investigate patients'/parents' perspective on ortho-k via telephone interviews. METHODS Clinical records of children undergoing ortho-k from a university optometry clinic were reviewed and the effects of ortho-k on refraction, vision and cornea were investigated. A telephone int...

hydrogen is an unusual substance in that its molecule exists in two forms, known as ortho and para, with markedly different properties. energy level of the ortho molecule is higher than para, therefore, the latter is employed for industrial purposes. consequently, for a high  conversion of  ortho to para hydrogen a catalyst reactor must be employed.  therefore, one of  the main objectives of th...

We discuss the ratio of orthoto para-H2 in photodissociation regions (PDRs). We draw attention to an apparent confusion in the literature between the ortho-to-para ratio of molecules in FUV-pumped vibrationally excited states, and the total H2 ortho-to-para abundance ratio. These ratios are not the same because the process of FUV-pumping of fluorescent H2 emission in PDRs occurs via optically t...