Thermite is a pyrotechnic composition consisting of a fuel and an oxidizer that produces an exothermic oxidation-reduction reaction, typically involving metal powders. The most common form of thermite involves a mixture of aluminum powder and a metal oxide, often iron(III) oxide (rust). When ignited, the aluminum reacts with the iron oxide to produce molten iron and aluminum oxide, releasing a significant amount of heat in the process.

Upset welding is a type of resistance welding process used to join two metal parts together by generating heat through the resistance of the materials. In upset welding, two workpieces are brought together under pressure. An electric current is passed through the interface of the materials, causing localized heating at the contact point due to electrical resistance. Once the materials reach their melting temperature, they are upset (compressed) further to create a solid bond as the molten area cools and solidifies.

Weld quality assurance refers to the systematic processes and practices implemented to ensure that welding operations meet specified standards and requirements for quality and reliability. This involves a combination of procedures, inspections, tests, and documentation throughout the welding process, from design and material selection to fabrication and final inspection. Key components of weld quality assurance include: 1. **Welding Procedure Specification (WPS)**: A document that outlines the specific welding parameters, materials, and methods to be used during the welding process.

As of my last knowledge update in October 2021, there was no widely known or established entity, technology, or concept known specifically as "Xcel-Arc." It is possible that "Xcel-Arc" may refer to a brand, product, or technology that emerged after that date or is specific to a niche industry.

An S wave, or secondary wave, is a type of seismic wave that is generated by earthquakes or other sources of energy release. It is one of the two main types of body waves, the other being P waves (primary waves). Here are some key characteristics of S waves: 1. **Type of Wave**: S waves are shear waves, meaning they move the ground perpendicular to the direction of wave propagation. This results in a side-to-side or up-and-down motion.

Anti-graffiti coatings are protective treatments applied to surfaces to prevent the adhesion of graffiti materials, such as spray paint, markers, and other forms of vandalism. These coatings create a barrier that makes it easier to remove graffiti without damaging the underlying surface. There are two main types of anti-graffiti coatings: 1. **Permanent Coatings**: These are more durable and provide long-lasting protection. They form a strong bond with the surface, making it difficult for graffiti to adhere.

Dyakonov surface waves, also known as Dyakonov waves, are a type of guided wave that can occur at the interface between an anisotropic material and a normal dielectric. These waves are named after the Russian physicist Mikhail Dyakonov, who contributed significantly to their theoretical development. ### Key Features: 1. **Anisotropic Media**: Dyakonov surface waves propagate in anisotropic materials, which have different physical properties in different directions.

Electroviscous effects refer to the changes in the viscosity of a colloidal suspension or a fluid containing charged particles when an electric field is applied. This phenomenon occurs because the applied electric field influences the distribution and movement of particles within the fluid, leading to alterations in the fluid's flow behavior and effective viscosity. In a colloidal suspension, particles are typically surrounded by an ionic double layer, which can be affected by an electric field.

"Overlayer" can refer to different concepts depending on the context, but it is not a widely recognized term with a singular definition. Here are a couple of interpretations that may apply: 1. **Technical Context**: In software development, particularly in UI/UX design or game development, an "overlayer" might refer to an interface element that overlays or covers other content, such as a modal dialog, notification, or tooltip.

Superhydrophobic coating is a surface treatment that significantly repels water, leading to a very high contact angle (typically greater than 150 degrees) when water droplets come into contact with the surface. This property allows water droplets to bead up and roll off the surface, taking away dirt and contaminants with them, a phenomenon often referred to as the "lotus effect," inspired by the self-cleaning properties observed in lotus leaves.

Weddell Sea Bottom Water (WSBW) is a dense, cold water mass that forms in the Weddell Sea, located off the coast of Antarctica. It plays a crucial role in global ocean circulation and is a significant component of the Antarctic Bottom Water (ABW), which is one of the key water masses contributing to the deep ocean circulation.

An "artificial wave" typically refers to a wave that is created or manipulated using technology or human intervention rather than occurring naturally. This term can apply to a variety of contexts, including: 1. **Wave Pool Technology**: In recreational settings, such as water parks or surf simulators, artificial waves are generated using machines that create wave patterns for activities like surfing or swimming. These waves can simulate oceanic waves, providing an experience similar to that of natural surf conditions.

The concept of energy cascade is commonly used in the fields of fluid dynamics and turbulence. It refers to the process through which energy is transferred from larger scales of motion to smaller scales, eventually dissipating as heat due to viscous effects. The energy cascade typically occurs in turbulent flows where energy introduced at larger scales (like waves or large eddies) is broken down into progressively smaller scales of motion.

Green's Law is not a commonly recognized term in scientific literature and might refer to different concepts depending on the context. However, it could refer to several potential areas: 1. **Green's Theorem**: In vector calculus, Green's Theorem relates a double integral over a region in the plane to a line integral around the region's boundary.

Tsunamis in lakes, often referred to as "lake tsunamis" or "seismic sea waves," are large waves generated by disturbances in or near a body of water, similar to ocean tsunamis, but occurring in lakes.

Internal wave breaking refers to the phenomenon where internal waves—waves that propagate within the stratified layers of a fluid, such as water—become unstable and break, similar to surface waves breaking on a beach. These internal waves are typically generated by various forces such as tides, wind, or the interaction of currents with topographical features like the ocean floor. Internal waves occur in regions where the density of water varies with depth—commonly seen in the ocean due to temperature and salinity gradients.

In physics, a "wake" refers to the disturbed flow of fluid that is left behind an object as it moves through that fluid. This concept is most commonly discussed in the context of fluid dynamics, where the object can be anything from a boat moving through water to an airplane flying through air. When an object moves through a fluid, it displaces the fluid and creates a region of altered flow behind it.

A wave-piercing hull is a type of ship or boat design characterized by a distinctive bow shape that allows it to effectively cut through waves rather than ride over them. This design typically features a slender, sharp bow that is often sharper and more hydrodynamic than traditional hull forms. The main advantages of wave-piercing hulls include: 1. **Reduced Drag**: By piercing through waves, these hulls can minimize resistance and drag, improving fuel efficiency and speed.

An earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. This release of energy can occur due to various geological processes, including: 1. **Tectonic Plate Movements**: The Earth's crust is made up of several large and small tectonic plates that float on the semi-fluid mantle beneath.

Mostafa Hashemitaba is an Iranian politician and businessman. He has held various positions within the Iranian government and has been involved in several enterprises in the private sector.