The Noise Control Act is a United States federal law that was enacted in 1972 to address and mitigate noise pollution. The primary objectives of the Act are to establish a comprehensive national policy to promote an environment free from noise that jeopardizes health and welfare and to empower federal and state agencies to regulate noise emissions that can affect the public.

Noise Free America is a nonprofit organization that advocates for reducing noise pollution and promoting sound management in communities across the United States. It aims to raise awareness about the negative effects of excessive noise on health, well-being, and quality of life. The organization works to promote policies, regulations, and community actions that help to mitigate noise pollution, such as stricter noise ordinances and public education campaigns about the importance of reducing noise in residential areas, schools, parks, and other public spaces.

Laser ultrasonics is a non-destructive testing (NDT) technique that utilizes laser technology to generate and detect ultrasonic waves in various materials. This method combines the principles of ultrasonics (which involves the use of high-frequency sound waves) with laser technology to analyze the properties and integrity of materials without causing any damage. ### Key Components of Laser Ultrasonics: 1. **Laser Generation**: A high-energy laser beam is focused onto the surface of the material being tested.

The Roentgen (symbol: R) is a unit of measurement for ionizing radiation exposure, specifically in air. It quantifies the amount of ionization produced in a specified volume of air by X-rays or gamma rays. The unit is named after Wilhelm Conrad Roentgen, the discoverer of X-rays. One Roentgen is defined as the amount of radiation that produces 2.

Giatec Scientific is a technology company that specializes in developing innovative solutions for the construction and materials testing industries. Primarily, the company focuses on advancing concrete testing and monitoring through the use of smart technologies. Giatec is well-known for its flagship products, including the Smart Concrete Sensor and the Giatec iCOR, which assist engineers and construction professionals in assessing the health and durability of concrete structures in real-time.

Non-SI units are measurements that are not part of the International System of Units (SI) but are still recognized and often used in specific contexts alongside SI units. The International System of Units recognizes certain non-SI units for convenience and practicality. Some commonly accepted non-SI units include: 1. **Liter (L)** - A unit of volume that is commonly used in everyday contexts.

Remote field testing refers to the process of evaluating and validating a product, technology, or system in a real-world environment, but from a distance or without the need for on-site presence. This method is often employed in various fields, including telecommunications, software development, agriculture, and environmental monitoring.

The British Institute of Non-Destructive Testing (BINDT) is a professional organization in the United Kingdom dedicated to promoting the science, practice, and benefits of non-destructive testing (NDT). NDT refers to a range of techniques used to inspect and evaluate materials and structures without causing damage. This includes methods such as ultrasonic testing, radiographic testing, magnetic particle testing, and dye penetrant testing, among others.

A checkweigher is a type of industrial scale used to verify the weight of products as they pass through a production line or packaging process. It ensures that items meet specified weight criteria, which is essential for quality control and regulatory compliance. Checkweighers can be used in various industries, including food and beverage, pharmaceuticals, and manufacturing.

Donecle is a company that specializes in drone technology, particularly focusing on the inspection and maintenance of infrastructure. Founded in France, Donecle has developed a range of autonomous drone solutions designed to perform aerial inspections of structures such as bridges, buildings, wind turbines, and other infrastructure assets. Their technology often includes advanced imaging and data analysis capabilities, enabling businesses to monitor the condition of their assets more effectively, enhance safety, and reduce costs associated with manual inspections.

Dye penetrant inspection (DPI) is a non-destructive testing (NDT) method used to detect surface-breaking defects, such as cracks, porosity, and other discontinuities in solid materials. It is particularly effective for non-porous materials like metals, plastics, and ceramics.

North Korean nuclear physicists are scientists in North Korea who specialize in nuclear physics, which encompasses the study of atomic nuclei, their interactions, and related phenomena. In the context of North Korea, these physicists are often associated with the country's nuclear weapons program, which has been a subject of significant international concern. North Korea has pursued nuclear weapons development for decades, leading to multiple nuclear tests and advancements in missile technology.

A liquid rheostat is an electrical device used to control the resistance in an electric circuit by using a liquid conductor. It typically consists of a reservoir filled with a conductive liquid, such as a saline solution or mercury, through which an electrode is immersed. The level of the liquid or the position of the electrode can be adjusted to vary the resistance, thus controlling the flow of current in the circuit.

Magnetic Particle Inspection (MPI) is a non-destructive testing (NDT) method used to detect surface and near-surface flaws in ferromagnetic materials. It is widely employed in various industries, including aerospace, automotive, manufacturing, and oil and gas, to ensure the integrity and safety of components. ### The Process of Magnetic Particle Inspection: 1. **Preparation**: The part to be inspected is cleaned to remove any dirt, grease, or coatings that could interfere with the inspection.

Photostimulated luminescence (PSL) is a phenomenon in which certain materials emit light when they are exposed to ultraviolet (UV) or visible light after having previously absorbed energy from ionizing radiation (such as gamma rays or beta particles). This process is commonly used in various applications, particularly in dosimetry (the measurement of radiation exposure) and in geological dating methods, such as optically stimulated luminescence (OSL).

Sliding Mode Control (SMC) is a nonlinear control technique that is particularly effective for systems that are subject to uncertainties and disturbances. It is based on the concept of sliding surfaces, which represent a desired state or behavior of the system. The main idea is to design a control law that drives the system's state onto a predefined sliding surface and keeps it there for all subsequent time, thereby achieving robust performance.

Time-of-flight diffraction (ToFD) ultrasonics is a non-destructive testing (NDT) technique primarily used for examining welds and other structural components for flaws and defects. It utilizes ultrasound waves to detect and characterize defects within materials by measuring the time it takes for the ultrasonic waves to travel through the material and reflect back from interfaces or discontinuities.

Water weights generally refer to weights that are filled with water to provide resistance for exercise or physical therapy. These weights can be adjusted easily by changing the amount of water they contain, allowing users to customize their workout intensity. They are often used in activities like swimming, aqua aerobics, or rehabilitation exercises. Additionally, "water weight" can also refer to the temporary weight gain that occurs due to the retention of fluid in the body.

Anne Borg is a physicist known for her work in the field of condensed matter physics, particularly focusing on aspects related to complex systems and quantum physics. She has contributed to various studies and research projects, exploring topics such as electronic properties of materials and theoretical approaches to understanding phase transitions.

Asle Sudbø is a Norwegian mathematician known for his work in the fields of geometry and topology. One of his notable contributions is in the study of complex geometry and differential geometry, particularly in the context of minimal surfaces and algebraic geometry. He is often mentioned in academic and research circles for his significant contributions to these areas.