Ant supercolony 1970-01-01
The term "ant supercolony" refers to a large, interconnected population of ants that can consist of millions or even billions of individual ants. These supercolonies are characterized by their cooperative behavior and the lack of aggression among individual ants from different nests within the same colony. Supercolonies can span vast areas and include multiple nests that work together as a single unit rather than as separate, competing colonies.
Pleometrosis 1970-01-01
Pleometrosis is a form of social behavior observed in some ant species, characterized by the simultaneous coexistence of multiple queens (reproductive females) within a single colony. This phenomenon can occur during the colony's founding stage or in established colonies. In pleometrous associations, multiple queens work together to establish a colony, sharing the responsibilities of foraging, nest defense, and brood care.
Regeneration (ecology) 1970-01-01
In ecology, regeneration refers to the processes through which ecosystems recover from disturbances and restore their structure, function, and species composition. It encompasses a range of biological and ecological mechanisms that enable plants, animals, and other organisms to repopulate or reestablish themselves after events such as fires, floods, storms, deforestation, or human-induced changes. There are two main types of regeneration: 1. **Natural Regeneration**: This occurs when ecosystems recover on their own without human intervention.
Task allocation and partitioning in social insects 1970-01-01
Task allocation and partitioning in social insects refers to the ways in which these organisms, often living in colonies, distribute different tasks among their members to efficiently accomplish work essential for the colony's survival and success. This process is crucial in species such as ants, bees, termites, and wasps, where the collective actions of individual insects contribute to the functioning of the entire colony.
Lockheed L-2000 1970-01-01
The Lockheed L-2000 was a proposed supersonic transport (SST) aircraft designed by Lockheed in the 1960s. It was part of a wider effort during that era to develop commercial aircraft capable of flying faster than the speed of sound, similar to the Concorde and the Boeing 2707, which were also in development at the time.
Anti-graffiti coating 1970-01-01
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.
Captive bubble method 1970-01-01
The Captive Bubble Method (CBM) is a technique used primarily in the field of materials science, particularly in the study of the properties of porous materials and the measurement of fluid permeability. This method involves creating a controlled environment in which a gas bubble is trapped within a porous medium. The primary goal is to analyze the behavior of the bubble as it interacts with the surrounding material, often to understand how liquids or gases move through porous structures.
Davisson–Germer Prize in Atomic or Surface Physics 1970-01-01
The Davisson–Germer Prize in Atomic or Surface Physics is an award established by the American Physical Society (APS) in honor of Clinton Davisson and Lester Germer, who are known for their foundational work in the field of electron diffraction and the study of surface phenomena. The prize recognizes and honors outstanding achievements in atomic or surface physics, with a focus on fundamental contributions that advance the understanding of these fields.
Desorption 1970-01-01
Desorption is the process by which a substance, typically a gas or liquid, is released from or is no longer adherent to a solid surface. It is the opposite of adsorption, where molecules adhere to a surface. Desorption can occur due to various factors, such as changes in temperature, pressure, or concentration. In environmental science, desorption is significant in understanding pollutant release from soils or sediments.
Electroviscous effects 1970-01-01
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 1970-01-01
"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.
HyperMach SonicStar 1970-01-01
HyperMach SonicStar is a concept for a high-speed aircraft designed to travel at speeds significantly exceeding that of traditional commercial airliners. HyperMach, the company behind SonicStar, envisions an aircraft capable of supersonic travel, which means it would travel faster than the speed of sound. The SonicStar is aimed at revolutionizing air travel by significantly reducing flight times on long-distance routes.
Tupolev Tu-244 1970-01-01
The Tupolev Tu-244 is a proposed supersonic airliner that was designed by the Tupolev design bureau in the late 1980s and early 1990s. It was intended to be a Russian counterpart to the Concorde and the Boeing 2707. The Tu-244 was envisioned as a commercial aircraft capable of carrying passengers at speeds greater than the speed of sound, effectively reducing travel times on long-haul routes.
Zero Emission Hyper Sonic Transport 1970-01-01
Zero Emission Hypersonic Transport (ZEHT) refers to advanced transportation systems designed to travel at hypersonic speeds—generally considered to be speeds greater than Mach 5, or five times the speed of sound—while producing zero harmful emissions. This concept is part of a broader effort to develop sustainable and eco-friendly transportation options that can reduce the environmental impact associated with air travel, particularly in terms of greenhouse gas emissions and other pollutants.
Dewetting 1970-01-01
Dewetting is a phenomenon that occurs when a liquid film retracts or breaks away from a solid surface, leading to the formation of droplets. This can happen when the adhesive forces between the liquid and the solid are weaker than the cohesive forces within the liquid. In other words, if the liquid prefers to stay in a droplet form rather than spread out over the surface, dewetting may occur.
Disjoining pressure 1970-01-01
Disjoining pressure is a concept in physical chemistry and materials science that refers to the pressure difference across a thin film or interface due to molecular interactions and forces. It is particularly relevant in the study of thin liquid films, such as those found in emulsions, foams, or biological membranes. Disjoining pressure arises from three primary sources: 1. **Van der Waals Forces**: These are attractive forces that can cause thin films to collapse when the film thickness is reduced.
Dyakonov surface wave 1970-01-01
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.
Hydrogel encapsulation of quantum dots 1970-01-01
Hydrogel encapsulation of quantum dots refers to the process of incorporating quantum dots (QDs)—nanoscale semiconductor particles with unique optical and electronic properties—into a hydrogel matrix. Hydrogel is a three-dimensional network of hydrophilic polymer chains that can hold a large amount of water and is often used for various biomedical and technological applications.
Hydrophile 1970-01-01
A hydrophile is a substance or molecule that has a strong affinity for water; it tends to interact well with water and often dissolves in it. This property arises from the presence of polar functional groups or charged particles in the hydrophilic substance, which can form hydrogen bonds or ionic interactions with water molecules. Common examples of hydrophilic substances include sugars, salts, and certain types of proteins.
Hydrophobe 1970-01-01
A hydrophobe is a substance or molecule that is repellent to water; it does not dissolve in or mix well with water. Hydrophobic molecules typically have nonpolar characteristics, meaning they do not have a charge that can interact with the polar water molecules. Common examples of hydrophobic substances include oils, fats, and certain types of waxes. In contrast, hydrophilic substances attract water and can dissolve in it, such as sugars and salts.