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Hand-held metal detectors are portable security devices used primarily to detect metal objects concealed on the human body. They are widely employed at security checkpoints in airports, courthouses, public institutions, prisons, concert venues, and similar locations. They operate on the principle of low-voltage electromagnetic fields and can rapidly detect small items such as firearms, knives, and metal fragments.Working PrincipleHand-held metal detectors detect magnetic disturbances caused by m

A battery is a rechargeable power source that stores electrical energy chemically and releases it as electrical energy when needed. It is used in automobiles to start the engine, power lighting systems, and supply electronic components. Batteries are typically manufactured using lead-acid technology.Structure and Operating PrincipleA battery consists of positive and negative plates, an electrolyte (a mixture of sulfuric acid and pure water), a case, terminals, and a cover. Chemical energy is con

Artificial intelligence agent (AI agent) are software or physical systems capable of perceiving their environment, processing the information they gather to generate meaningful responses, and acting autonomously or semi-autonomously toward specific goals. Unlike classical software, they possess decision-making and learning capabilities. These agents are supported by techniques such as machine learning, deep learning, and natural language processing. Today, they have a wide range of applications,

Atomic absorption spectroscopy (AAS) is an analytical method based on the absorption of light at specific wavelengths by gaseous atoms. Atoms absorb energy when transitioning from lower energy (ground) states to higher (excited) energy states. The amount of absorption measured during this transition is proportional to the number of atoms in the ground state, allowing the concentration of the element in the sample to be determined. AAS offers exceptional sensitivity, particularly for the determin

Piezoelectric sensor is a device that uses the piezoelectric effect to convert a mechanical stress such as pressure acceleration strain or force into an electrical signal or conversely to convert an electrical signal into a mechanical vibration. These sensors are also classified as "transducers" because they transform one form of energy into another. The piezoelectric phenomenon is based on the ability of certain crystals and ceramic materials to accumulate an electric charge on their surfaces w

A craft knife is a handheld tool featuring a sharp, thin, and replaceable blade, typically housed in a plastic or metal body. It enables precise cutting of materials such as paper, cardboard, plastic, thin wood panels, silicone, seam tape, foam, and similar substances. Thanks to its sliding mechanism, the blade tip can be carefully extended and locked at the desired length. Craft knives are widely used in construction, hobbyist work, advertising, packaging, and interior design industries.Feature

A spray gun is an application device powered by air or electricity, used to evenly and controllably spray liquids such as paint, varnish, and primer onto surfaces. It ensures homogeneous distribution, uniform film thickness, and high efficiency in surface coatings. It is widely preferred in industrial painting systems, the automotive sector, furniture manufacturing, and decorative applications.FeaturesSuitable for liquid coating materials such as paint, varnish, primer, and lacquer.Operates via

Symbolic logic is a system of logic whose foundations were laid about a century ago through the work of mathematicians and logicians. It is also known as formal logic or modern logic. Its primary aim is to express reasoning as formal operations by transforming language into symbolic form, thereby enabling precise and verifiable analysis. This process eliminates ambiguities inherent in everyday language and establishes a rigorous, controllable structure.Definition and ScopeSymbolic logic is a sys

Chatbot technologies are software systems that interact with humans via text or voice using natural language processing (NLP) and artificial intelligence algorithms. These systems analyze user inputs, generate contextually appropriate responses, and provide interactive services across various domains. Chatbots are widely used especially in customer service, education, healthcare, finance, and e-commerce.Core ComponentsThe general architecture of chatbot systems consists of three fundamental comp

Liquid nitrogen is a colorless, odorless, and inert liquid obtained by condensing nitrogen gas at -196 °C. Considered a fundamental component of cryogenic technologies, this substance is widely used in biotechnology, medicine, food science, and materials science. Many universities and research centers in Türkiye possess liquid nitrogen production infrastructure. For example, at Harran University’s HUBTAM, liquid nitrogen is used in biological sample storage processes. Globally, the use of liquid