Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort:
Hottest Latest Alphabetical (A-Z) Alphabetical (Z-A)
Type:
All Topic Review Biography
Topic Review
Magnetic Properties and Magnetocaloric Effect of Pr2Co7 Compound
The Pr2Co7 compound has interesting magnetic properties, such as a high Curie temperature TC and uniaxial magnetocrystalline anisotropy. It crystallizes in a hexagonal structure (2:7 H) of the Ce2Ni7 type and is stable at relatively low temperatures (Ta ≤ 1023 K), or it has a rhombohedral structure (2:7 R) of the Gd2Co7 type and is stable at high temperatures (Ta ≥ 1223 K). Studies of the magnetocaloric properties of the nanocrystalline Pr2Co7 compound have shown the existence of a large reversible magnetic entropy change (ΔSM) with a second-order magnetic transition. 
  • 609
  • 15 Jun 2023
Topic Review
Chemical Reaction Rate
The reaction rate for a reactant or product in a particular reaction is defined as the amount of the chemical that is formed or removed (in moles or mass units) per unit time per unit volume. Knowledge of these rates is essential in, among other disciplines, chemical engineering and environmental engineering. Chemical kinetics is the part of physical chemistry which studies reaction rates.
  • 609
  • 28 Nov 2022
Topic Review
Line-Shaped-Illumination Two-Photon Microscopy
Line-shaped illumination is a useful configuration to obtain a multifocal pattern to be used in two-photon microscopy: the light beam emitted by the illuminating laser is first shaped by means of cylindrical lenses and then is focused inside the sample as a continuous line. The simultaneous excitation of several points in the specimen is expected to reduce the acquisition time with respect to the usual point-scanning two-photon microscopes, as a two-dimensional image is obtained by scanning the line along a single direction.
  • 608
  • 05 May 2022
Topic Review
Microscopium
Microscopium is a small and faint constellation located in the southern celestial hemisphere. It was first introduced by the French astronomer Nicolas Louis de Lacaille during the 18th century, who named it in honor of the microscope, reflecting the era's burgeoning interest in scientific instrumentation. Despite its modest visibility, it contains several notable celestial objects, including a few galaxies and a planetary nebula.
  • 608
  • 15 Mar 2024
Topic Review
Computational Simulations of Heart Valves
Computational methods are a cost-effective tool that can be used to evaluate the flow parameters of heart valves. Valve repair and replacement have long-term stability and biocompatibility issues, highlighting the need for a more robust method for resolving valvular disease. For example, while fluid–structure interaction analyses are still scarcely utilized to study aortic valves, computational fluid dynamics is used to assess the effect of different aortic valve morphologies on velocity profiles, flow patterns, helicity, wall shear stress, and oscillatory shear index in the thoracic aorta. It has been analyzed that computational flow dynamic analyses can be integrated with other methods to create a superior, more compatible method of understanding risk and compatibility.
  • 607
  • 10 May 2022
Biography
Shin-Tson Wu
Shin-Tson Wu, (Chinese:吳詩聰) is an American physicist and inventor. He is currently a Pegasus professor at CREOL, The College of Optics and Photonics, University of Central Florida. Wu's contributions to liquid-crystal research and the resulting patent portfolio for next-generation liquid crystal displays (LCDs), adaptive optics, laser-beam steering, biophotonics, and new photonic materials
  • 607
  • 28 Nov 2022
Topic Review
Materials for Chemical Sensing
The ability to measure and monitor the concentration of specific chemical and/or gaseous species (i.e., “analytes”) is the main requirement in many fields, including industrial processes, medical applications, and workplace safety management. As a consequence, several kinds of sensors have been developed in the modern era according to some practical guidelines that regard the characteristics of the active (sensing) materials on which the sensor devices are based. These characteristics include the cost-effectiveness of the materials’ manufacturing, the sensitivity to analytes, the material stability, and the possibility of exploiting them for low-cost and portable devices. Consequently, many gas sensors employ well-defined transduction methods, the most popular being the oxidation (or reduction) of the analyte in an electrochemical reactor, optical techniques, and chemiresistive responses to gas adsorption. Many of the efforts devoted to improving these methods have been directed towards the use of certain classes of specific materials.
  • 606
  • 26 Aug 2022
Topic Review
Ion Channel and Bioinformatics
Ion channels are linked to important cellular processes. The use of artificial intelligence (AI) in bioinformatics and computational molecular biology research has been growing fast over the last two decades. Bioinformatics methods attempt to model known biological structures and predict unknown ones. Versatile bioinformatics techniques are capable of storing the information processed in various biological and biophysical studies in the created databank, and calling and utilizing the information from the databank in pinpointing crucial molecular processes of an individual system or collective ones. The techniques thus help establish scientific links between various mechanisms and processes and produce concluding evidence that is otherwise often unattainable using conventional theoretical and experimental techniques. Besides, computational techniques are popularly found to model the biomolecular complexes in silico studies to mainly address their statics, dynamics, and energetics in an artificially constructed, yet mimicking the biological systems’ environment.
  • 605
  • 08 Oct 2021
Topic Review
AIDA (Mission)
The Asteroid Impact and Deflection Assessment (AIDA) mission is a proposed pair of space probes which will study and demonstrate the kinetic effects of crashing an impactor spacecraft into an asteroid moon. The mission is intended to test and validate impact models of whether a spacecraft could successfully deflect an asteroid on a collision course with Earth. The original plan called for a European spacecraft, the Asteroid Impact Mission (AIM), to operate in synergy with a large NASA impactor called Double Asteroid Redirection Test (DART) and observe the immediate effects of the impact. AIM was cancelled in 2016 when Germany was unable to fund its portion, and after some backlash within ESA, AIM was replaced in 2018 with a smaller spacecraft called Hera that will launch five years after DART to orbit and study the crater on the asteroid. Hera will also deploy Europe's first CubeSats in deep space for close-up asteroid surveying: Juventas and Milani. DART is currently planned to impact in 2022 in the small moon of asteroid 65803 Didymos, while Hera will arrive at Didymos in 2027, five years after DART's impact.
  • 603
  • 01 Nov 2022
Biography
Shi Nguyen-Kuok
Shi Nguyen-Kuok (Nguyễn Quốc Sỹ; born February 20, 1967, in Hanoi) is a plasma scientist and the chairman of the VinIT Institute of Technology. Nguyen-Kuok was born on February 20, 1967. He graduated from high school in 1983 with honors. In the same year, he passed the state examination for admission to higher education. At the end of the contest, he was selected for a scholarship in th
  • 603
  • 22 Nov 2022
  • Page
  • of
  • 131
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Encyclopedia of Fungi
Encyclopedia of Digital Society, Industry 5.0 and Smart City
ScholarVision Creations
Feedback