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Elastic and plastic strain

Internal strain within a metal is either elastic or plastic. Elastic strain is not permanent, while the plastic is. In the case of elastic strain this is observed as a distortion of the crystal lattice, in the case of plastic strain this is obser ...

Encircled energy

The optics term encircled energy refers to a measure of concentration of energy in an optical image, or projected laser at a given range. If a single star is brought to its sharpest focus by a lens giving the smallest image possible with that giv ...

Engineering analysis

Engineering analysis involves the application of scientific analytic principles and processes to reveal the properties and state of a system, device or mechanism under study. Engineering analysis is decompositional: it proceeds by separating the ...

Engineering optimization

Engineering optimization is the subject which uses optimization techniques to achieve design goals in engineering. It is sometimes referred to as design optimization.

Fault reporting

Fault reporting is a maintenance concept that increases operational availability and that reduces operating cost through three mechanisms. Reduce labor-intensive diagnostic evaluation Provide notification to management for degraded operation Elim ...

Function (engineering)

In the lifecycle of engineering projects, there are usually distinguished subsequently: Requirements and Functional specification documents. The Requirements usually specifies the most important attributes of the requested system. In the Design s ...

Function–means tree

In engineering design, a function–means tree is a method for functional decomposition and concept generation. At the top level, main functions are identified. Under each function, a means is attached. Alternative solution elements can also be att ...

Hardware architecture

In engineering, hardware architecture refers to the identification of a systems physical components and their interrelationships. This description, often called a hardware design model, allows hardware designers to understand how their components ...

Hardware bug

A hardware bug is a defect in the design, manufacture, or operation of computer hardware that causes incorrect operation. It is the counterpart of software bugs which refer to flaws in the code which operates computers, and is the original contex ...

Housing (engineering)

In engineering, a housing is an exterior case or enclosure used to protect an interior mechanism, including integrated fittings or brackets to keep internal components in place. The housing prevents the interior mechanism from being fouled by out ...

Imagineering

Imagineering is the implementation of creative ideas in practical form. The word was registered as a trademark of Disney Enterprises, Inc. in 1990, and is well known from its use within the name of Walt Disney Imagineering. The word was actually ...

Improvisation

Improvisation is the activity of making or doing something not planned beforehand, using whatever can be found. Improvisation in the performing arts is a very spontaneous performance without specific or scripted preparation. The skills of improvi ...

Interoperation

In engineering, interoperation is the setup of ad hoc components and methods to make two or more systems work together as a combined system with some partial functionality during a certain time, possibly requiring human supervision to perform nec ...

Iso-elastic

In engineering, iso-elastic refers to a system of elastic and tensile parts which are arranged in a configuration which isolates physical motion at one end in order to minimize or prevent similar motion from occurring at the other end. This type ...

Key relevance

In master locksmithing, key relevance is the measurable difference between an original key and a copy made of that key, either from a wax impression or directly from the original, and how similar the two keys are in size and shape. It can also re ...

Latency (engineering)

Latency is a time interval between the stimulation and response, or, from a more general point of view, a time delay between the cause and the effect of some physical change in the system being observed. Latency is physically a consequence of the ...

Level of invention

Level of invention is a relative degree of changes to the previous system in the result of solution of inventive problem. Term was defined and introduced by TRIZ author G. S. Altshuller. After initially reviewing 200.000 patent abstracts, Altshul ...

Ingemar Lundquist

Lundquist graduated from the Stockholm Institute of Technology in 1945 with a mechanical engineering degree. He migrated to the United States in 1948 and became an American citizen in 1950.

Material take off

Material take off is a term used in engineering and construction, and refers to a list of materials with quantities and types that are required to build a designed structure or item. This list is generated by analysis of a blueprint or other desi ...

Model-based enterprise

Model-based enterprise is a term used in manufacturing, to describe a strategy where an annotated digital three-dimensional model of a product serves as the authoritative information source for all activities in that products lifecycle. A key adv ...

Modular design

Modular design, or modularity in design, is an approach that subdivides a system into smaller parts called modules, which can be independently created, modified, replaced or exchanged between different systems.

Modular process skid

A modular process skid is a process system contained within a frame that allows the process system to be easily transported. Individual skids can contain complete process systems and multiple process skids can be combined to create larger process ...

Non-recurring engineering

Non-recurring engineering refers to the one-time cost to research, design, develop and test a new product or product enhancement. When budgeting for a new product, NRE must be considered to analyze if a new product will be profitable. Even though ...

Engineering notation

Engineering notation or engineering form is a version of scientific notation in which the exponent of ten must be divisible by three. As an alternative to writing powers of 10, SI prefixes can be used, which also usually provide steps of a factor ...

Operating deflection shape

Operating deflection shape, is a term often used in the structural vibration analysis, known as ODS analysis. ODS analysis is a method used for visualisation of the vibration pattern of a machine or structure as influenced by its own operating fo ...

Overengineering

Overengineering is the act of designing a product to be more robust or have more features than often necessary for its intended use, for a process to be unnecessarily complex or inefficient. Overengineering is often done to increase a factor of s ...

Overhead (engineering)

In engineering, some methods or components make special demands on the system. The extra design features necessary to accommodate these demands are called overhead. For instance, in electrical engineering, a particular integrated circuit might dr ...

Padded V-hull

padded v-hulls can come in many different configurations, from that of a pure race boat to that of a recreational craft. A padded v-hull is very similar in basic shape to the popular v-hull which simply forms a vee when looking at the back of the ...

Parts stress modelling

Parts stress modelling is a method in engineering and especially electronics to find an expected value for the rate of failure of the mechanical and electronic components of a system. It is based upon the idea that the more components that there ...

Processing medium

In industrial engineering, a procesing medium is a gaseous, vaporous, fluid or shapeless solid material that plays an active role in manufacturing processes - comparable to that of a tool.

Profile (engineering)

In standardization, a profile is a subset internal to a specification. Aspects of a complex technical specification may necessarily have more than one interpretation, and there are probably many optional features. These aspects constitute a profi ...

Projected area

Projected area is the two dimensional area measurement of a three-dimensional object by projecting its shape on to an arbitrary plane. This is often used in mechanical engineering and architectural engineering related fields, specifically hardnes ...

Real versus nominal value

The distinction between real value and nominal value occurs in many fields. From a philosophical viewpoint, nominal value represents an accepted condition, which is a goal or an approximation, as opposed to the real value, which is always present.

Rental utilization

In equipment and tool rental companies, utilization is the primary method by which asset performance is measured and business success determined. In basic terms it is a measure of the actual revenue earned by assets against the potential revenue ...

Resilience (engineering and construction)

In the fields of engineering and construction, resilience is the ability to absorb or avoid damage without suffering complete failure and is an objective of design, maintenance and restoration for buildings and infrastructure, as well as communit ...

Satellite delay

Satellite delay is the noticeable latency which occurs due to the speed of light, when sending data to and from satellites, especially the much further out geosynchronous satellites. Bouncing a signal off one geosynchronous satellite takes about ...

Self-powered dynamic systems

A self-powered dynamic system is defined as a dynamic system powered by its own excessive kinetic energy, renewable energy or a combination of both. The particular area of work is the concept of fully or partially self-powered dynamic systems req ...

Signal

In signal processing, a signal is a function that conveys information about a phenomenon. In electronics and telecommunications, it refers to any time varying voltage, current or electromagnetic wave that carries information. A signal may also be ...

Stress concentration

A stress concentration is a location in an object where the stress is significantly greater than the surrounding region. Stress concentrations occur when there are irregularities in the geometry or material of a structural component that cause an ...

T-criterion

The T-failure criterion is a set of material failure criteria that can be used to predict both brittle and ductile failure. These criteria were designed as a replacement for the von Mises yield criterion which predicts the unphysical result that ...

Technical peer review

In engineering, technical peer review is a type of engineering review. Technical peer reviews are a well defined review process for finding and fixing defects, conducted by a team of peers with assigned roles. Technical peer reviews are carried o ...

Terrafugia TF-X

The Terrafugia TF-X is an autonomous flying car under development by Boston-based Terrafugia. The TF-X seats four passengers and uses an engine combined with two electric motors for propulsion. Unlike the previously proposed Transition, the TF-X ...

Tolerance coning

Tolerance coning is the engineering discipline of creating a budget of all tolerances that potentially add/subtract to affect adequacy of a particular parameter. This is particularly critical where stages of design/manufacture precede test/use. F ...

Tolerance interval

A tolerance interval is a statistical interval within which, with some confidence level, a specified proportion of a sampled population falls. "More specifically, a 100×p%/100× tolerance interval provides limits within which at least a certain pr ...

Traditional engineering

Traditional engineering, also known as sequential engineering, is the process of marketing, engineering design, manufacturing, testing and production where each stage of the development process is carried out separately, and the next stage cannot ...

Transient response

In electrical engineering and mechanical engineering, a transient response is the response of a system to a change from an equilibrium or a steady state. The transient response is not necessarily tied to abrupt events but to any event that affect ...

Turning radius

The turning radius or turning circle of a vehicle is the radius of the smallest circular turn that the vehicle is capable of making.

Barriers to pro-environmental behaviour

Pro-environmental behaviour is behaviour that a person consciously chooses in order to minimize the negative impact of their actions on the environment. Barriers to pro-environmental behaviour are the numerous factors that hinder individuals when ...

Carrying capacity

The carrying capacity of a biological species in an environment is the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water, and other necessities available in the environment. In po ...

Climate governance

In political ecology and environmental policy, climate governance is the diplomacy, mechanisms and response measures "aimed at steering social systems towards preventing, mitigating or adapting to the risks posed by climate change". A definitive ...