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The PSI was developed based on the AASHO Road Test's present serviceability rating (PSR). AASHO Road Test was a set of experiments carried out by the AASHTO from 1956 to 1961. [4] Unlike the PSR, which was a ride quality rating that required a panel of observers to ride in a car over the pavement of interest, the PSI does not require a panel of ...
A simple example is a test-suite—the input/output pairs specify the functionality of the program. A variety of techniques are employed, most notably using satisfiability modulo theories (SMT) solvers, and genetic programming , [ 7 ] using evolutionary computing to generate and evaluate possible candidates for fixes.
During this time, Wiesner coined the term 'Psi' to denote extrasensory perception and psychokinesis. Their model, which was not intended to prove or disprove the existence of such phenomena, was first introduced in 1946, as part of a jointly authored paper where Wiesner and Robert Thouless use the term 'Psi' to indicate parapsychological phenomena.
In software development, a codebase (or code base) is a collection of source code used to build a particular software system, application, or software component.Typically, a codebase includes only human-written source code system files; thus, a codebase usually does not include source code files generated by tools (generated files) or binary library files (object files), as they can be built ...
Testing is an integral part of software development that needs to be planned. It is also important that testing is done proactively; meaning that test cases are planned before coding starts, and test cases are developed while the application is being designed and coded.
Psi is an ab initio computational chemistry package originally written by the research group of Henry F. Schaefer, III (University of Georgia). Utilizing Psi, one can perform a calculation on a molecular system with various kinds of methods such as Hartree-Fock , Post-Hartree–Fock electron correlation methods, and density functional theory .
This practice dates back to at least the early 2000s, [2] when it was commonly called a shared codebase. [2] Google , [ 3 ] Meta , [ 4 ] Microsoft , [ 5 ] Uber , [ 6 ] Airbnb , and Twitter [ 7 ] all employ very large monorepos with varying strategies to scale build systems and version control software with a large volume of code and daily changes.
Refactoring is usually motivated by noticing a code smell. [2] For example, the method at hand may be very long, or it may be a near duplicate of another nearby method. Once recognized, such problems can be addressed by refactoring the source code, or transforming it into a new form that behaves the same as before but that no longer "smells".