5,319 research outputs found
Numerical Implementation of lepton-nucleus interactions and its effect on neutrino oscillation analysis
We discuss the implementation of the nuclear model based on realistic nuclear
spectral functions in the GENIE neutrino interaction generator. Besides
improving on the Fermi gas description of the nuclear ground state, our scheme
involves a new prescription for selection, meant to efficiently enforce
energy momentum conservation. The results of our simulations, validated through
comparison to electron scattering data, have been obtained for a variety of
target nuclei, ranging from carbon to argon, and cover the kinematical region
in which quasi elastic scattering is the dominant reaction mechanism. We also
analyse the influence of the adopted nuclear model on the determination of
neutrino oscillation parameters.Comment: 19 pages, 35 figures, version accepted by Phys. Rev.
Analysis of agroclimatic resources for Georgian viticulture
One of the results of the \u201cResearch Project for the Study of Georgian Grapes and Wine Culture\u201d promoted by the National Wine Agency of the Republic of eorgia was the production of a bilingual handbook for modern viticulture. The first sections of the handbook were devoted to the agrometeorological analysis of environmental resources and limitations, comprising a general analysis of Georgian climate and agrometeorological features, followed by detailed regional cards. The agrometeorological analysis of Georgia was based on daily data collected by National and International networks for the period 1974-2013. Several agrometeorological indexes were calculated in order to define resources and limitations for viticulture for each viticultural region of Georgia, providing fundamental information for grape-growing and wine-making
The wave energy flux of high frequency diffracting beams in complex geometrical optics
We consider the construction of asymptotic solutions of Maxwell's equations for a diffracting wave beam in the high frequency limit and address the description of the wave energy flux transported by the beam. With this aim, the complex eikonal method is applied. That is a generalization of the standard geometrical optics method in which the phase function is assumed to be complex valued, with the non-negative imaginary part accounting for the finite width of the beam cross section. In this framework, we propose an argument which simplifies significantly the analysis of the transport equation for the wave field amplitude and allows us to derive the wave energy flux. The theoretical analysis is illustrated numerically for the case of electron cyclotron beams in tokamak plasmas by using the GRAY code [D. Farina, Fusion Sci. Technol. 52, 154 (2007)], which is based upon the complex eikonal theory. The results are compared to those of the paraxial beam tracing code TORBEAM [E. Poli et al., Comput. Phys. Commun. 136, 90 (2001)], which provides an independent calculation of the energy flow
Inventarisasi Serangga Polinator di Lahan Pertanian Semangka (Citrulus Lanatus) Kota Pekanbaru dan Pengembangannya untuk Sumber Belajar pada Konsep Keanekaragaman Hayati di SMA
The research was conducted to determine the types of insect pollinators on watermelon (Citrulus lanatus) agricultural land Pekanbaru City in February to June, 2014. Research results are used to teaching materials in the form of learning modules, insektarium media and interactive learning media. This research was carried out by two stage that is the field research stage and stage development of learning resources. Data retrieval technique using total sampling with threere search stations. Station I : located in the Naga Sakti Street, RT 02/RW 02, SimpangBaru Village, Tampan District, Pekanbaru. Station II : located in the Lintas Timur Street Kilometers 18, RT 05/RW 08, Kulim Village, Tenayan Raya District, Pekanbaru. Station III : located in the Ikan Parang Street, RT 03/RW 05, Muara Fajar Village, Rumbai District, Pekanbaru. Biological parameters observed are the type of insect pollinators and physical parameters include temperature, humidityand light intensity. The results showed that there are 13 species of insect pollinators belonging to 6 families and 3orders that the Order Hymenoptera, Order Lepidoptera and Order Diptera. Order Hymenoptera Family Apidae (2 species), Family Anthoporidae (1 species), Family Vespidae (1 species). Order Lepidoptera Famliy Nympalidae (5 species), Family Pieridae (3 species) and Order Diptera Family Syrphidae (1 species). Results of the study can beusedas a learning resourcein the form of learning modules, insectarium media and interactive learning media on biodiversity material class X High School. The average valueof learning resources developed ranged from 3.31 to 3.51with the validity criteria are very valid. The final stageof the research conducted limited testingof learning modules were tested in class X SMA N 8 Pekanbaru the number of students as many as 34 students. Based on the results of this research is that learning resources developed can already be implemented with the validity criteria are very valid
A Microfluidic Device Based on Standing Surface Acoustic Waves for Sorting and Trapping Microparticles
Microfluidic devices can provide innovative means to handle and control the transport of
(bio)particles within a fluid flow. The advantage of microscale devices is that different components
can be integrated in a single chip at low cost, with a negligible power consumption, compared to
alternative solutions. In this work, a numerical investigation is developed on the use of standing
surface acoustic waves (SAWs) generated within a microfluidic channel in order to manipulate
microparticles. Far-field waves are generated via inter-digital transducers (IDTs), travel on the surface
of a piezoelectric substrate and finally interfere in the channel, giving rise to a standing wave solution
in terms of acoustic pressure. Results are reported for different geometries of the channel, to define
the sensitivity of the acoustic pressure field to the relevant geometric features of the channel. This
investigation shows how the acoustic radiation and drag forces interact with each other to move and
focus the particles, possibly leading to a separation of heterogeneous ones, and generally provide a
way to manipulate them at a small scale
Asteroseismology using quadrupolar f-modes revisited: breaking of universal relationships in the slow hadron-quark conversion scenario
In this work, we consider polar perturbations and we calculate the frequency
and damping time of the quadrupolar fundamental f -mode of compact objects,
constructed using a wide range of model-independent hybrid equations of state
that include quark matter. We give special attention to the impact of the
hadron-quark conversion speed that, in the slow case, gives rise to a branch of
slow stable hybrid stars. Moreover, we study the validity of universal
relationships proposed in the literature and find out that none of them remains
valid when slow stable hybrid stars are taken into account. This fact could
constrain the applicability of asteroseismology methods with fundamental modes
designed to estimate the properties of pulsating compact objects. We hope that
this result could be tested with the start up of the third-generation
gravitational wave observatories, which might shed some light on the f -mode
emission from compact objects.Comment: 13 pages, 13 figures. Comments are welcom
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