Research Infinity - All Articles

Physics Maths Engineering

An explicit formula of powers of the 2 × 2 quantum matrices and its applications

We present an explicit formula of the powers for the 2×2 quantum matrices, that is a natural quantum analogue of the powers of the usual 2 × 2 matrices. As applications, we give some non-commutative relations of the entries of the powers for the 2 × 2 quantum matrices, which is a simple proof of the results of Vokos-Zumino-Wess (1990)....
Posted 2 years ago

Biomedical

Predicting the Oxidation States of Mn ions in the Oxygen Evolving Complex of Photosystem II Using Supervised and Unsupervised Machine Learning

Serial Femtosecond Crystallography at the X-ray Free Electron Laser (XFEL) sources enabled the imaging of the catalytic intermediates of the oxygen evolution reaction of Photosystem II. However, due to the incoherent transition of the S-states, the resolved structures are a convolution from different catalytic states. Here, we train Decision Tree Classifier and K-mean clustering models on Mn...
Posted 2 years ago

Physics Maths Engineering

On the quantum nature of a fireball created in ultrarelativistic nuclear collisions

In the article, the fireball formed in the collision of relativistic nuclei is considered as a quantum object. Based on this, an attempt is made to explain the difference in the measurements of hyperon yields in the two experiments - NA49 and NA57. Using the basic principles of quantum mechanics, it was shown that a fireball can have two quantum states - with and without ignited Quark-Gluon Plasma...
Posted 2 years ago

Physics Maths Engineering

Effective action of string theory at order α in the presence of boundary

Recently, using the assumption that the string theory effective action at the critical dimension is background independent, the classical on-shell effective action of the bosonic string theory at order α in a spacetime manifold without boundary has been reproduced, up to an overall parameter, by imposing the O(1, 1) symmetry when the background has a circle. In the presence of the boundary, we co...
Posted 2 years ago

Biomedical

Comparison between Bromine, Calcium, Chlorine, Iodine, Potassium, Magnesium, Manganese, and Sodium Contents in Normal Thyroid and Riedel’s Struma

Role of chemical elements (ChE) in etiology and pathogenesis of Riedel’s disease (RD) is unclear. The aim of this exploratory study was to assess whether there were significant changes in thyroid tissue levels of eight ChE (Br, Ca Cl, I, K, Mg, Mn, and Na) are present in the fibrotic transformed thyroid. Eight ChE of thyroid tissue were determined in 6 patients with RD. The control group inc...
Posted 2 years ago

Biomedical

Iraq Healthcare System During the First Year of Covid-19 Pandemic

Background: The year 2020 witnessed the rapid spread of covid-19 pandemic in Iraq and in almost all the countries in the world. This spread has created a serious health crises and a public health emergency in Iraq and throughout the world. Throughout the world, healthcare systems have been negatively influenced by the pandemic and experienced unexpected changes. We have previously provided sever...
Posted 2 years ago

Physics Maths Engineering

Synthesis and Characterization of Zincoxide Nanoparticles of Average Diameter 10nm in Aqueous Medium

Synthesis of Zincoxide nanoparticles (ZnO NPs) with definite size and shape and their morphological characterization rationally is really a challenging aspect at present due to the ongoing demand of these nanosize particles for their divergent use in different field of science and technology. Reduction of Zinc acetate dihydrate by sodium hydroxide was performed to produce ZnO NPs by follow...
Posted 2 years ago

Physics Maths Engineering

Gravitational Fields and Gravitational Waves

The relative velocity between objects with finite velocity affects the reaction between them. This effect is known as general Doppler effect. The Laser Interferometer Gravitational-Wave Observatory (LIGO) discovered gravitational waves and found their speed to be equal to the speed of light c. Gravitational waves are generated following a disturbance in the gravitational field; they affect the...
Posted 2 years ago

Physics Maths Engineering

The Microscopic Mechanisms Involved in Superexchange

:In earlier work, we previously established a formalism that allows to express the exchange energy J vs. fundamental molecular integrals without crystal field, for a fragment A–X–B, where A and B are 3d 1 ions and X is a closed-shell diamagnetic ligand. In this article, we recall this formalism and give a physical interpretation: we may rigorously predict the ferromagnetic (J < 0) or antif...
Posted 2 years ago

Physics Maths Engineering

Multi-Criteria Analysis in the Decision-Making Approach for the Linear Ordering of Urban Transport Based on TOPSIS Technique

The effects of urban transport are highly concerning. The rapid urbanization and motorization in smart cities have a huge impact on sustainability. The goal of the paper is to analyse the smart cities selected, in terms of the urban transport. This paper presents an overview of research works published between 1991 and 2020 concerning urban transport and MCDM (multi-criteria decision making). ...
Posted 2 years ago