Absorption Spectroscopy of Conjugated Dyes and Cadmium Selenide Quantum Dots

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Abstract Conjugated polymethine dyes and the cadmium selenide nanoparticles that were animate to their last incite energy rank were indagate by infrared (IR) spectroscopy. The dyes were comparison with varying polymethine chains (p = 7, 9, and 11) with highest peak wavelength at 590 nm, 705 nm, and 820 nm. The wavelength was…

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Adaptive Optics Overview

Adaptive Optics Adaptive optics is a technological development used for optical system performance improvement. It works by reducing the effect of wavefront distortions. Light from a distant celestial object gets distorted as it passes through earth’s atmosphere, thus a telescope located on earth’s surface cannot form accurate images. It would take a telescope placed above Earth’s surface,…

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Advantages of Metamaterials

Juan Castellanos   The future is here and you wouldn’t believe how far research has come. Through countless experiments and hard work scientists have expanded the limits on what we thought to be impossible via advances in metamaterials. These so called “metamaterials” are artificially constructed improvements over naturally occurring materials commonly used in inventions. These…

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How Do Aeroplanes Fly?

Leo Wang Introduction: Aeroplanes have become an increasingly popular method of transportation for human beings to travel all over the world. In this case, some people may consider why the aeroplanes drive faster or how these huge machines fly successfully in the air. This research is mainly to figure out this amazing ability for a…

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Aluminium Heat Capacities

Aim The aim of the experiment was to determine the specific heat capacities, with uncertainties, of two different materials; for the purposes of this experiment, it was chosen to be aluminium Introduction Specific heat capacity is defined as the quantity of heat energy, which will raise the temperature of unit mass (1kg) of a substance…

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Analysis of Ferrous Ferrite (Fe3O4)

1.1 INTRODUCTION: The naturally occurring ferrite is the ferrous ferrite (Fe3O4) as “Load stone”. In early days it was called as ferromagnetic material. L.Neel, tells us that these materials are “ferromagnetic” material due to uncompensated anti parallel spin arrangement. Due to interesting intrinsic properties magnetic materials are classified into Ferromagnetic materials, Ferrites. In last decades…

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Analysis of S-d Exchange Interactions in Dilute Cu-mn Alloys

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Phenomenological analysis of the s-d exchange interactions in dilute Cu-Mn alloys at helium temperatures AL-Jalali, M. A. Abstract: The S-d exchange interactions in dilute Cu-Mn alloys was studied on concentration ( C ) varying between 10.5 and 2081.8 ppm of Mn in Cu within the ( 0.03K – 4.2K ) temperature range. Using electrical resistivity…

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An Experiment Determining Lift from Pressure Distributions

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Abstract The experiment described in this report used a pressure distribution over a NACA 0012 airfoil to determine the lift and moment coefficient about the quarter-chord on that airfoil. Lift is one of the most important and governing forces acting on a body moving in a fluid. The calculation of lift and drag is at…

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An x-ray machine

How does an X-ray machine work? An X-ray machine is essentially a camera instead of visible light, however, it uses X-rays to expose the film. X-rays are like light in that they are electromagnetic waves, but they are more energetic so they can penetrate many materials to varying degrees. When the X-rays hit the film,…

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Applications of Hard X-ray Photoelectron Spectroscopy

Applications of Hard X-ray Photoelectron Spectroscopy to bulk materials Jingru Chi ABSTRACT X-ray Photoelectron Spectroscopy is a powerful, relevant and non-destructive method for studying atoms, molecules and surfaces [1]. However, investigations are limited to atoms, molecules and surfaces since low energy electrons limit the depth resolution, resulting in three-dimensional bulk state cannot be detected. Hard…

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Aqueous Magnetic Fluids Instabilities in a Hele-Shaw Cell

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   M. RÄ‚CUCIU “Lucian Blaga” University, Faculty of Science, Dr.Ratiu Street, No.5-7, Sibiu, 550024, Romania In this study, it was investigated the interface patterns of two immiscible, viscous fluids into the geometry of a horizontal Hele-Shaw cell, considering that one of the fluids is an aqueous magnetic fluid. In general, the total energy of a…

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Argon Cluster and Graphene Collision Simulation Experiment

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Formation of Nanopore in a Suspended Graphene Sheet with Argon Cluster Bombardment: A Molecular Dynamics Simulation study Abstract: Formation of a nanopore in a suspended graphene sheet using an argon gas beam was simulated using molecular dynamics (MD) method. The Lennard-Jones (LJ) two-body potential and Tersoff–Brenner empirical potential energy function are applied in…

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Artificially Constructed Spacetime with Closed Timelike Curves

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Artificially constructed spacetime with closed timelike curves to test the plausibility of Godel’s universe OBJECTIVES The objectives of this research are to discover if in this set up we can prove blabla. The aim is to open up a door that leads to a more serious  interest and complex research on this topic.…

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Atomic Short Range Order (SRO) in Ni20Pd80 Alloy

An Experimental and Theoretical Study of the Atomic Short Range Order (SRO) in Ni20Pd80 Alloy ——————————————————————   Abstract The behavior of atomic short range order (SRO) has been investigated in a polycrystalline alloy of Ni20Pd80 at different temperatures by using diffuse X-ray scattering intensities. The ordering energies and the atomic SRO-parameters (α1) have been calculated by using…

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History of Atomic Theory

The atomic theory is developed since 2000 years ago the Greek philosopher Democritus proposed that there was a limit to how small one could be divide matter, this smallest matter indivisible particle was called “atom”. However this atomic theory of Democritus was criticized by Aristotle who proposed a model based on four basic “elements” of…

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Calculations of Rare Earth (Y, La and Ce) Diffusivities

First-principles calculations of rare earth (Y, La and Ce) diffusivities in bcc Fe Xueyun Gaoa,b,[*], Huiping Rena, Chunlong Lia,c, Haiyan Wanga, Yunping Jia, Huijie Tan a ABSTRACT: The impurity diffusivities of rare earth elements, Y, La and Ce, in bcc Fe have been investigated by the first-principles calculations within nine-frequency model. The microscopic parameters in the pre-factor and…

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Calculations of the Spin Structure of Trimer Cr3

Calculation of Magnetic Properties by Generalized Spin Hamiltonian and Generation of Global Entanglement: Cr Trimer in molecule and on surface Oleg V. Stepanyuk2, Oleg V. Farberovich1 1 Raymond and Bekerly Sackler Faculty of Exact Sciences, School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel 2 Max Planck Institute of Microstructure Physics, Halle, Germany Here we present the results of the first-principles calculations of the spin structure of trimer Cr3 with…

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Effect of Temperature on the Resistivity of a Semiconductor

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Introduction A thermistor is a resistance thermometer, or a resistor whose resistance is dependent on temperature. The term is a combination of “thermal” and “resistor”. It is made of metallic oxides, pressed into a bead, disk, or cylindrical shape and then compressed with an impermeable material such as epoxy or glass. This means…

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Cardiovascular System in Parabolic Flight and Spaceflights

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Human Spaceflight: Alterations of the cardiovascular system during parabolic flights and spaceflights The purpose of this research is to identify the changes occurring during parabolic flights and spaceflights, where there’s weightlessness. The importance of the cardiovascular system in space, is recognised as well as some of its fundamentals based on past researches. In…

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Chaotic Curiosity or Curios Chaos

Abhishek Tiwari The word science comes from “scientia”, Latin word for knowledge. Webster’s dictionary defines science as “the knowledge covering the general truths of the operations of general laws, especially as obtained and tested through the scientific method and concerned with the physical world”. In a layman’s interpretation science is a systematic way to obtain…

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CMS Detector at the LHC: Calorimetry (EM, Had, Forward)

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   CMS structure: Solenoid: Most particles are stopped by the detector except for few, such as muons, neutrino. Main difference between ATLAS and CMS is that CMS has solenoid on the outer layer, so it bends the trajectory of the muons again in an opposite direction (opposite pointing magnetic field). Depending on how much…

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Coincidence Counting With NAI Scintillation Detectors

ABSTRACT Coincidence counting is a technique employed in nuclear medicine for PET imaging. This technique utilizes a positron emitting radionuclide that is injected into patients to track biochemical and physiological processes. The positron annihilates with an electron and emit two 0.511MeV gamma rays which are detected simultaneously by two scintillation detectors. In the experiment, two…

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Comparison of Different Turbulent Models for Backward -facing Step Flow

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Comparison of Different Turbulent Models for Backward -facing Step Flow Abstract A comparison of different turbulence model for flow over a backward facing Step is presented. A Reynolds number of 36,00 and an averaged velocity of 41.7 m/s was considered. The result was compared with data by Driver and Seegmiller.  The purpose of…

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Comparison of Specific Heat Capacity of Different Metals

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Samerah Mansha   Aim The aim of this investigation was to measure the specific heat capacity (SHC) of various different metals such as aluminum, iron and brass of different volumes to find out if they all have the same SHC or different. Additionally, insulation was used to measure how efficient insulation was against…

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Concepts of Time Travel: Wormholes, Gravity and Blackholes

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Any sort of time travel to the past through wormholes or any viable strategy is presumably incomprehensible, generally mysteries might happen. So unfortunately, it seems that time travel to the past will never happen; a bafflement for dinosaur seekers and an easing for antiquarians. How to travel in future? Through wormholes: We should…

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Co-Ni-Al and Co-Ni-Al-Fe Ferromagnetic Shape Memory Alloy

Share this: Facebook  Twitter  Reddit  LinkedIn  WhatsApp   Microstructures and Magnetic Anisotropy Properties of Co-Ni-Al and Co-Ni-Al-Fe ferromagnetic shape memory alloy Abstract This study investigated the microstructure, magnetic anisotropy and the trend of magnetic field induced strain in Co-Ni-Al and Co-Ni-Al-Fe ferromagnetic shape memory alloys. At room temperature, a trunk-type γ phase precipitates in the matrix phase and the grain boundaries in each…

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