94,302 research outputs found
Aplicación de los códigos QR en el control de bodegas
Proyecto de Graduación (Licenciatura en Ingeniería en Construcción) Instituto Tecnológico de Costa Rica. Escuela de Ingeniería en Construcción, 2016.6
The project will involve the implementation of the QR code in the construction industry by applying it to the administration and control of wine.
The QR code (quick response code, for its acronym in English, quick response code, it would be if Spanish translation). It is useful for storing information in an array of points or a two-dimensional bar code created in 1994 by the Japanese company Denso Wave, a subsidiary of Toyota module.
It is characterized by the three squares that are in the corners (as shown in figure 5) and that allow to detect the position of the code to the reader.
The creators (a team of two people in Denso Wave, led by Masahiro Hara) aimed that the code would allow its contents to be read at high speed. While initially used to record area parts in vehicle manufacturing, QR codes today are used for inventory management in a variety of industries.
Under this premise it is to develop this graduation project
Traceability requirements for information systems in the agro-food sector
Food safety and quality are keys to companies' business survival and great effort and
resources are devoted to them. The food production chain, from the farms and feed mills to the
finished products leaving the processing plants, is subject to independent examination and auditing
either under the sector's own assurance schemes under official regulatory inspection and testing
programmes with published results. For farmers and the agro-food industry, this means new market
opportunities – and continual change. Food safety is an on-going challenge, demanding the best
control systems and day-to-day vigilance on farms, in processing plants and throughout the
distribution system. In order to enable consumers to make the right choice when buying their food and
in order to build up markets for quality products, labelling has to provide all relevant information
about the production process. Besides complete information about its ingredients, food labels should
bear information about its place of origin and the way in which it was produced
Alternative statistical-mechanical descriptions of decaying two-dimensional turbulence in terms of "patches" and "points"
Numerical and analytical studies of decaying, two-dimensional (2D)
Navier-Stokes (NS) turbulence at high Reynolds numbers are reported. The effort
is to determine computable distinctions between two different formulations of
maximum entropy predictions for the decayed, late-time state. Both formulations
define an entropy through a somewhat ad hoc discretization of vorticity to the
"particles" of which statistical mechanical methods are employed to define an
entropy, before passing to a mean-field limit. In one case, the particles are
delta-function parallel "line" vortices ("points" in two dimensions), and in
the other, they are finite-area, mutually-exclusive convected "patches" of
vorticity which in the limit of zero area become "points." We use
time-dependent, spectral-method direct numerical simulation of the
Navier-Stokes equations to see if initial conditions which should relax to
different late-time states under the two formulations actually do so.Comment: 21 pages, 24 figures: submitted to "Physics of Fluids
Gravitational Collapse and Fragmentation in Molecular Clouds with Adaptive Mesh Refinement
We describe a powerful methodology for numerical solution of 3-D
self-gravitational hydrodynamics problems with extremely high resolution. Our
method utilizes the technique of local adaptive mesh refinement (AMR),
employing multiple grids at multiple levels of resolution. These grids are
automatically and dynamically added and removed as necessary to maintain
adequate resolution. This technology allows for the solution of problems in a
manner that is both more efficient and more versatile than other fixed and
variable resolution methods. The application of AMR to simulate the collapse
and fragmentation of a molecular cloud, a key step in star formation, is
discussed. Such simulations involve many orders of magnitude of variation in
length scale as fragments form. In this paper we briefly describe the
methodology and present an illustrative application for nonisothermal cloud
collapse. We describe the numerical Jeans condition, a criterion for stability
of self-gravitational hydrodynamics problems. We show the first well-resolved
nonisothermal evolutionary sequence beginning with a perturbed dense molecular
cloud core that leads to the formation of a binary system consisting of
protostellar cores surrounded by distinct protostellar disks. The scale of the
disks, of order 100 AU, is consistent with observations of gaseous disks
surrounding single T-Tauri stars and debris disks surrounding systems such as
Pictoris.Comment: 10 pages, 6 figures (color postscript). To appear in the proceedings
of Numerical Astrophysics 1998, Tokyo, March 10-13, 199
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