Dasar can refer to various concepts depending on the context. In the Indonesian language, "dasar" means "foundation" or "basis." It can also relate to fundamental principles in various fields such as education, law, or philosophy.

An ion drift meter is an analytical instrument used to measure the mobility of ions in a gas phase. It operates on the principle of ion mobility spectrometry (IMS), where ions are generated, separated based on their sizes and shapes, and then detected. The key working principle involves applying an electric field that causes the ions to drift through a medium, typically a buffer gas, allowing for the measurement of their velocities.

Isotropic radiation refers to the emission of energy, such as electromagnetic radiation or particles, uniformly in all directions from a source. In other words, an isotropic source emits radiation with the same intensity regardless of the observer's position or angle relative to the source. This concept is often used in various fields including physics, astronomy, and engineering. For example, in astrophysics, many stars can be approximated as isotropic radiators, emitting light and heat evenly into space.

Laser dye refers to organic compounds that are used as laser gain media. These dyes can be dissolved in a solvent and are commonly utilized in dye lasers, which are a type of laser that produces laser light over a wide range of wavelengths. The specific wavelengths depend on the chemical structure of the dye. There are several key points about laser dyes: 1. **Organic Composition**: Laser dyes are typically organic molecules. Common examples include rhodamines, fluoresceins, and phthalocyanines.

The Malter effect, also known as the Malter phenomenon, refers to the observed increase in the yield of electrons from a metallic surface during the excitation with ultraviolet (UV) light, particularly in the context of secondary electron emission in materials like semiconductors and metals. This effect can occur when the incident radiation induces the emission of secondary electrons, which are electrons emitted from a material after being struck by energetic particles or photons.

"Middle World" can refer to different concepts depending on the context. Here are a few interpretations: 1. **Literature and Mythology**: In some mythological and literary contexts, "Middle World" might refer to a realm that exists between higher spiritual realms and lower realms, acting as a bridge between them. This concept is often found in various mythologies, such as the idea of "Middle Earth" in J.R.R.

Self-diffusion refers to the process by which particles, such as atoms or molecules, move within a substance without the influence of external forces or concentration gradients. This phenomenon is particularly significant in solids and liquids, where it describes the movement of identical particles through a medium. In self-diffusion, the atoms or molecules exchange positions with their neighbors due to thermal energy, leading to a gradual spread of the particles throughout the substance.

Specific mechanical energy (SME) is a measure of the total mechanical energy per unit mass of an object or a system. It is commonly used in fields such as fluid dynamics, aerospace engineering, and mechanical engineering to analyze the energy states of systems.

Superconducting steel typically refers to a type of steel that exhibits superconductivity, which is the ability to conduct electricity without resistance below a certain critical temperature. However, it's important to clarify that traditional steel does not exhibit superconducting properties at any temperature. Superconductivity is usually associated with certain metal and ceramic materials, rather than with conventional steel alloys. Research into superconducting materials includes various alloys and compounds that may incorporate iron, which is a primary component of steel.

Transient friction loading refers to the temporary, dynamic application of frictional forces in various mechanical systems. This concept is often studied in contexts such as the behavior of materials under different loading conditions, tribology (the study of friction, wear, and lubrication), and mechanical engineering applications. In transient friction loading, the conditions may change rapidly over time, leading to fluctuations in the frictional force experienced by the components involved.

Psychophysics is a branch of psychology that studies the relationship between physical stimuli and the sensations and perceptions they produce in the human mind. It seeks to quantify the relationship between stimuli such as sound, light, and touch, and the sensations associated with them. This field investigates how changes in the intensity, duration, or quality of a stimulus can affect our sensory experience.

Oceanography is the scientific study of the ocean, encompassing a diverse range of topics and disciplines. It seeks to understand the physical, chemical, biological, and geological aspects of the ocean and its interactions with the atmosphere and the Earth's landmasses. Oceanography can be broadly divided into several sub-disciplines: 1. **Physical Oceanography**: This subfield focuses on the physical properties of the ocean, including currents, waves, tides, and the ocean's role in climate regulation.