Engineering

Recently published

Biomechanics

Biomechanics is the study of how the systems and structures…

Learn more »

Bioinformatics

Bioinformatics is an interdisciplinary field of science that combines biology,…

Learn more »

Biological engineering

Biological engineering, or bioengineering/bio-engineering, is the application of principles of biology…

Learn more »

Buoyancy

Buoyancy or upthrust is an upward force exerted by a…

Learn more »

Direct current (DC)

Direct current (DC) is electricity flowing in a constant direction,…

Learn more »

Triboelectric nanogenerator (TENG)

Triboelectric nanogenerators (TENG) is an energy harvesting device that converts…

Learn more »

Wear

Wear is the damaging, gradual removal or deformation of material…

Learn more »

Electric resistance

The electrical resistance is the opposition to the motion of…

Learn more »

Passive device

Components incapable of controlling current by means of another electrical…

Learn more »

Active device

An active device is any type of circuit component with…

Learn more »

Filter circuit

Circuits capable of selectively filtering one frequency or range of…

Learn more »

Organic light-emitting diode (OLED)

OLED (Organic Light Emitting Diodes) is a light-emitting diode (LED),…

Learn more »

Electric circuit

An electric circuit is an unbroken loop of conductive material…

Learn more »

Piston

A piston is a component of reciprocating engines, reciprocating pumps,…

Learn more »

Biogas

Biogas is a mixture of different gases produced by anaerobic…

Learn more »

Biomaterial

A biomaterial is any substance that has been engineered to…

Learn more »

Biotribology

Biotribology is the study of friction, wear and lubrication of…

Learn more »

Biofluid mechanics

Biological fluid mechanics, or biofluid mechanics, is the study of…

Learn more »

Kinesiology

Kinesiology (from the Greek κίνησις kínēsis, “movement” (itself from κινεῖν…

Learn more »

Nuclear potential energy

Nuclear potential energy is the potential energy of the particles…

Learn more »

Rigid body

A rigid body (also known as rigid object) is defined…

Learn more »

Ultimate tensile strength (UTS)

Ultimate tensile strength (UTS), often shortened to tensile strength (TS),…

Learn more »

Compression strength

Compressive strength or compression strength is the capacity of a…

Learn more »

Shear strength

In engineering, shear strength is the strength of a material…

Learn more »

Fracture toughness

Fracture toughness is a property which describes the ability of…

Learn more »

Fracture

In metallurgy, the fracture is a sudden break of metal…

Learn more »

Ductility

Ductility is a technological property of matter that indicates the…

Learn more »

Indentation hardness

Indentation hardness tests are used in mechanical engineering to determine…

Learn more »

Electrical impedance

Electrical impedance is a physical quantity that represents the opposition…

Learn more »

Plasticity

Plasticity is the capacity to resist plastic deformation (dislocation movement…

Learn more »

Viscoelasticity

Viscoelasticity is the study of materials which have a time-dependent…

Learn more »

Piezoelectric transducer

The relationship between the mechanical stress applied to the crystal…

Learn more »

Semiconductor

A semiconductor is a substance with an electrical conductivity between…

Learn more »

Amorphous semiconductor

An amorphous semiconductor also called “thin film” is a non-crystalline…

Learn more »

Ablation

Ablation is the removal of material from the surface of…

Learn more »

Abrasive

An abrasive is any material (often a mineral) used to…

Learn more »

Getter

The getter is an inert electrode, coated with magnesium or…

Learn more »

Temperature

Temperature is a physical property of a material that gives…

Learn more »

Calibration

Calibration is the procedure used to establish a relationship between…

Learn more »

Repeatability

In Metrology repeatability is a static characteristic of an instrument defined as…

Learn more »

Stability

In Metrology, stability is the ability of an instrument to…

Learn more »

Drift

In Metrology drift can be defined as the variation caused…

Learn more »

Threshold of hearing

Sound level measurements in decibels are generally referenced to a…

Learn more »

Dead space or Threshold

In Metrology, dead space or threshold is a static characteristic of…

Learn more »

Resolution

In Metrology the resolution of a measuring instrument is the…

Learn more »

Range of interval (or span)

In Metrology the range of the interval \([a, b]\) is the…

Learn more »

Reproducibility

In Metrology, the term “reproducibility,” when reported in instrument specifications,…

Learn more »

Linearity

In Metrology, linearity is actually a measure of nonlinearity of…

Learn more »

Precision

In Metrology, precision indicates the repeatability or reproducibility of an…

Learn more »

Sensitivity

In Metrology sensitivity of a measuring instrument is that metrological…

Learn more »

Accuracy vs Precision

The difference between precision and accuracy needs to be understood…

Learn more »

Accuracy

Accuracy is the degree of agreement of the measured dimension…

Learn more »

Hysteresis

Hysteresis is a delay of the effect when the forces…

Learn more »

Luminous intensity (candela)

The units of luminous intensity based on flame or incandescent…

Learn more »

Measurement instrument

A device used for the measurement of a certain physical…

Learn more »

Time

Time is an abstract entity (as well as a physical…

Learn more »

Calorimetry

Calorimetry is used to measure the amount of thermal energy…

Learn more »

Equipotential surface

An equipotential surface is therefore defined as the set of…

Learn more »

Hertz

The hertz (symbol: Hz) is the derived unit of frequency…

Learn more »

Voltage

The potential energy, stored in the form of an electric…

Learn more »

Linear Variable Differential Transformer (LVDT)

A linear variable differential transformer (LVDT) is one of the…

Learn more »

MEMS accelerometer

The accelerometers realized with MEMS technology (Micro-Electro-Mechanic System) are nothing…

Learn more »

Laser accelerometer

The laser accelerometer is a particular type of the accelerometer…

Learn more »

Piezoelectric accelerometer

The piezoelectric accelerometer uses, as a principle for detecting mass…

Learn more »

Capacitive accelerometer

The capacitive accelerometer uses, as the operating principle for detecting…

Learn more »

LVDT accelerometer

The LVDT accelerometer uses an LVDT (Linear Variable Differential Transformer)…

Learn more »

Piezoresistive accelerometer

The piezoresistive accelerometer is a variant of the strain gauge…

Learn more »

Strain gauge accelerometer

The strain gauge accelerometer uses the same principle of the…

Learn more »

Apparent weight

Apparent weight is a property of objects that correspond to…

Learn more »

Specific weight

The weight of a unit volume of a substance is…

Learn more »

Weight

Weight is the force of gravity acting on an object.…

Learn more »

Accelerometer

An accelerometer is a measuring instrument able of detecting and/or…

Learn more »

Decibel

The decibel (symbol: dB) is a unit of measurement used…

Learn more »

Parallam – Parallel strand lumber (PSL)

Parallam© is a composite material obtained by the union of…

Learn more »

Tolerance

Tolerance means the limit or acceptable limits of the variations…

Learn more »

Systematic error

Systematic errors are predictable and typically constant or proportional to…

Learn more »

Random error

Random error is always present in a measurement. It is…

Learn more »

Parallax

Parallax is a deceptive change in the relative position of…

Learn more »

Reading error

Reading error is that what happens when evaluating the relative…

Learn more »

Insertion error

The insertion error is caused by the presence of the…

Learn more »

Rapidity error

The error of rapidity is that metrological quality of a…

Learn more »

Error band

The range of maximum deviation of the transducer output from…

Learn more »

Fidelity error

In Metrology, it is said that a measuring instrument is…

Learn more »

Zero error

Zero error means the error that is made when long-term…

Learn more »

Sensor

In Metrology, a sensor is a sensitive device placed in…

Learn more »

Transducer

A transducer is a technological device capable of switching the…

Learn more »

Flow rate

In Metrology the term flow rate indicates the maximum value…

Learn more »

Gravimeter

The gravimeter is a particular type of accelerometer specifically designed…

Learn more »

Prandtl number

The Prandtl number (Pr) is a dimensionless number that expresses…

Learn more »

Reynolds number

The Reynolds number is a dimensionless parameter that represents the…

Learn more »

Rayleigh number

The Rayleigh number (Ra) is a dimensionless parameter that expresses…

Learn more »

Grashof number

The Grashof number is a dimensionless parameter which, unlike the…

Learn more »

Nusselt number

The Nusselt number (Nu) represents the ratio between the heat…

Learn more »

Barograph

A barograph is an altimeter equipped with devices for recording…

Learn more »

Barothermograph

A barothermograph consists of a barograph and a thermograph, which…

Learn more »

Altimeter

An altimeter is a measuring instrument used to determine the…

Learn more »

Thermograph

A thermograph is a measuring instrument capable of recording the…

Learn more »

Barothermohygrograph

A barothermohygrograph consists of a barograph and a hygrograph, which…

Learn more »

Hygrograph

A hygrograph is a measuring instrument consisting of an absorption…

Learn more »

Bathythermograph

A bathythermograph is a measuring instrument used mainly in bathymetry,…

Learn more »

Thermohygrograph

A thermohygrograph is a measuring instrument used in meteorology, consisting…

Learn more »

Bolometer

The bolometer is a measuring instrument made by Langley Samuel…

Learn more »

Boundary scan

The boundary scan (or JTAG) indicates a method of testing…

Learn more »

Electric thermometer

Electric thermometers are temperature transducers that exploit the phenomena of…

Learn more »

Resistance thermometer

Resistance thermometers are a type of electric thermometers, simple resistive…

Learn more »

Thermistor (semiconductor thermometer)

Thermistors are electric thermometers made by sintering semiconductor powders such…

Learn more »

Thermocouple

A thermocouple is a temperature transducer (electric thermometer) whose physical…

Learn more »

Strain gauge (extensometer)

In Metrology, extensometry studies the measurement of the deformation of…

Learn more »

Lubricant

A lubricant is an organic or synthetic substance (it can…

Learn more »

Sensibility

In Metrology, the sensitivity of a measuring instrument is a…

Learn more »

Microelectromechanical systems (MEMS)

The MEMS technology (acronym of Micro Electro Mechanical Systems) is…

Learn more »

Noise

In Metrology, noise is defined as the set of random…

Learn more »

Elastomer

Elastomer is defined as a macromolecular material (natural or synthetic…

Learn more »

Thermoplastic elastomer

Thermoplastic elastomers (TPE), sometimes referred to as thermoplastic rubbers, are…

Learn more »

International System of Units (SI)

The International System of Units universally abbreviated SI (from the…

Learn more »

Energy

Energy is defined as a measurement of the ability to do work or to heat an…

Learn more »

Non-renewable energy

Non-renewable energies are energy sources that tend to run out…

Learn more »

Renewable energy

Renewable energy is a kind of energy from sources that…

Learn more »

Energy harvesting

Energy harvesting (also known as power harvesting or energy scavenging or…

Learn more »

True value

In metrology, the exact value of a variable is called…

Learn more »

Gilsonite

The Gilsonite (also known as “uintahite,” “asphaltum” or asphaltite), named…

Learn more »

Measurement

The term measurement is closely associated with all the activities about…

Learn more »

Scientific method

The scientific method is an investigative process for experimentation and…

Learn more »

Scientific notation

In many disciplines of science and engineering, very large and…

Learn more »

Absolute error

The absolute error is generally defined as the difference between…

Learn more »

Length

The length, quantitatively and objectively, identifies a material body according…

Learn more »

Uncertainty

In Metrology, the estimation of the dispersion of the values…

Learn more »

Measurand

A measurand is defined as a physical quantity to be measured (such as length,…

Learn more »

Physical quantity

A physical quantity is defined as a physical property of…

Learn more »

Quantity value

In metrology, the quantity value represents the number and the…

Learn more »

Adhesive

An adhesive is a substance that bonds two surfaces to…

Learn more »

Boundary layer

A boundary layer is a very thin layer of viscous…

Learn more »

Laminar flow

Laminar flow is non-turbulent flow in smooth parallel (non-intersecting) paths…

Learn more »

Laminar-turbulent transitional flow

The process of a laminar fluid flow becoming turbulent is…

Learn more »

Turbulence or turbulent flow

Turbulence (or turbulent flow) is a flow regime characterized by…

Learn more »

Metrology

Metrology is the science of measurement, embracing both experimental and…

Learn more »

Engineering

Engineering is a discipline dedicated to problem-solving with the use…

Learn more »

Fluid flow

A fluid flow may be described in two different ways:…

Learn more »

Fluid

In physics, a fluid is a substance that continually deforms…

Learn more »

Fluid mechanics

Fluid mechanics is one of the oldest and broadest fields…

Learn more »

Anelasticity

Anelasticity is a characteristic of viscoelastic materials that depends on…

Learn more »

Dimensionless quantity

Some quantities are defined as the ratio of two quantities…

Learn more »

Algorithm

An algorithm is a set of detailed instructions defining a…

Learn more »

Cybernetics

Cybernetics is the science of the control, communication, and processing…

Learn more »

Informatics

Informatics involves the usage of information processing and the engineering…

Learn more »

Information

In terms of communication, information is expressed either as the…

Learn more »