1,058 research outputs found
TOY: A System for Experimenting with Cooperation of Constraint Domains
AbstractThis paper presents, from a user point-of-view, the mechanism of cooperation between constraint domains that is currently part of the system TOY, an implementation of a constraint functional logic programming scheme. This implementation follows a cooperative goal solving calculus based on lazy narrowing. It manages the invocation of solvers for each domain, and projection operations for converting constraints into mate domains via mediatorial constraints. We implemented the cooperation among Herbrand, real arithmetic (R), finite domain (FD) and set (S) domains. We provide two mediatorial constraints: The first one relates the numeric domains FD and R, and the second one relates FD and S
Pionic Decay of a Possible d'-Dibaryon
The pionic decay of a possible d'-dibaryon in the process d' --> pi + N + N
is studied in the microscopic quark shell model and with a single-quark
transition operator describing the transition q --> pi + q'. For the d' with
quantum numbers J^P=0^-, T=0, we employ a six-quark shell-model wave function
with a spatial s^5p [51]_X-configuration with N=1 harmonic oscillator quanta.
It is shown that the pionic decay width depends strongly on the mass and size
of the d'. In the case that the calculated d' mass is close to the experimental
one a small pionic decay width of 0.04 MeV is obtained. This is an order of
magnitude smaller than the experimentally suggested value of 0.5 MeV. Two
possibilities to improve the calculated width are suggested. The effect of the
nonstatic correction term in the transition operator and the influence of the
form factor at the decay vertex on the decay width are also discussed.Comment: Latex, 15 pages, 1 postscript figure, accepted for publication in
Nucl. Phys.
Data aggregator implemented through industrial gateway IOT 2050 for smart microgrid
[EN] This paper describes the operation and implementation of a Data Aggregator based on an Industrial Gateway (DAIG) for the storage and transmission of information from an experimental Smart microgrid hybridised with green hydrogen. This DAIG consists of a Siemens IOT 2050, a commercial device that combines physical characteristics such as robustness and open-source software. To achieve this objective, each subsystem involved in the microgrid has a set of sensors and a Data Acquisition Device (DAD) to obtain the relevant logical magnitudes of its operation. The IOT 2050 serves as a centralised system, communicating via Modbus TCP/IP with each DAD and storing the data read in a local database by means of a Python script. Finally, as an example of the application of the designed infrastructure, an IoT software is implemented to visualise the data stored in the DAIG
Exchange Currents in Photoproduction of Baryon Resonances
We calculate photoexcitation amplitudes for several nucleon and delta
resonances. We use a chiral quark model including two-body exchange currents.
The two-body currents give important contributions. For the delta (1232) and
the D13 (1520) we observe that the individual exchange current contributions
considerably cancel each other while in the case of the Roper resonance and the
S11 (1535) we get a reinforcement of the two-body amplitudes. In comparison
with present experimental data, we obtain both for the S11 (1535) and for the
Roper resonance an improvement with respect to the impulse approximation.Comment: 9 pages, 1 figur
Efectos agudos de las vibraciones de cuerpo completo sobre variables funcionales en niños con parálisis cerebral
Accésit Congreso SIBB 2015El objetivo del presente estudio fue analizar los efectos agudos de las vibraciones de cuerpo completo (VCC) sobre el equilibrio y la movilidad en niños con parálisis cerebral, y comparar los efectos producidos por el estÃmulo vibratorio vertical y oscilante sobre las variables mencionadas. Se utilizó un diseño cruzado aleatorio en el que participaron 6 niños y adolescentes con parálisis cerebral. Se llevaron a cabo 5 sesiones de tratamiento, utilizando las dos primeras como familiarización. En cada una de las tres sesiones restantes, el paciente recibÃa de forma aleatoria un tratamiento de VCC diferente consistentes en 5 series de 1 minuto de vibración seguidas de 1 minuto de descanso. Antes y después de cada intervención se realizaron valoraciones de esfuerzo percibido, equilibrio y movilidad a través de una escala visual analógica y los test de Romberg y timed up and go, respectivamente. La escala visual analógica mostró un incremento del esfuerzo percibido tras la aplicación del tratamiento (+75%, p=0,007). En el equilibrio se observó un aumento en la velocidad de desplazamiento del centro de presiones tras la intervención (+11,3%, p=0,024).Todos los protocolos aplicados en niños y adolescentes con parálisis cerebral, modificaron de manera aguda el equilibrio, no mostrándose cambios respecto a la movilidad. Los resultados del presente estudio demuestran que, el estÃmulo vibratorio no parece inducir mayores modificaciones sobre el equilibrio y la movilidad que el propio trabajo isométrico sobre la plataforma.Peer ReviewedAward-winnin
Computing the absorption and emission spectra of 5-methylcytidine in different solvents: a test-case for different solvation models
International audience; The optical spectra of 5-methylcytidine in three different solvents (tetrahydrofuran, acetonitrile, and water) is measured, showing that both the absorption and the emission maximum in water are significantly blue-shifted (0.08 eV). The absorption spectra are simulated based on CAM-B3LYP/TD-DFT calculations but including solvent effects with three different approaches: (i) a hybrid implicit/explicit full quantum mechanical approach, (ii) a mixed QM/MM static approach, and (iii) a QM/MM method exploiting the structures issuing from molecular dynamics classical simulations. Ab-initio Molecular dynamics simulations based on CAM-B3LYP functionals have also been performed. The adopted approaches all reproduce the main features of the experimental spectra, giving insights on the chemical−physical effects responsible for the solvent shifts in the spectra of 5-methylcytidine and providing the basis for discussing advantages and limitations of the adopted solvation models
A Web Services Infrastructure for the Management of Mashup Interfaces
In the technological world of today, user interfaces (as an essential part of many software applications) are constantly changing in order to meet the needs of different users and adapt to their environment. Accordingly, there is a need for mechanisms to carry out these change processes. This article describes a structure of web services which support the adaptation which constructs mashup type web user interfaces. These interfaces are constructed using third party component architectures, called COTSgets
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