497 research outputs found
Can new generations explain neutrino masses?
In this talk we explore the possibility that the smallness of the observed
neutrino masses is naturally understood in a modified version of the standard
model with N extra generations of fermions and N right-handed neutrinos, in
which light neutrino masses are generated at two loops. We find that with N = 1
it is not possible to fit the observed spectrum of masses and mixings while
with N = 2 it is. Within this extension, we analyse the parameters which are
allowed and the possible phenomenological signals of the model in future
experiments. Contribution to the proceedings of Les Rencontres de Moriond EW
2011, Young Scientist Forum
Surrogate Modelling of the FLUTE Low-Energy Section
Numerical beam dynamics simulations are essential tools in the study and design of particle accelerators, but they can be prohibitively slow for online prediction during operation or for systematic evaluations of new parameter settings. Machine learning-based surrogate models of the accelerator provide much faster predictions of the beam properties and can serve as a virtual diagnostic or to augment data for reinforcement learning training. In this paper, we present the first results on training a surrogate model for the low-energy section at the Ferninfrarot Linac- und Test-Experiment (FLUTE)
Optimization Studies of Simulated THz Radiation at FLUTE
The linac-based test facility FLUTE (Ferninfrarot Linac Und Test Experiment) at KIT will be used to study novel accelerator technology and provide intense THz pulses. In this paper, we present start-to-end simulation studies of FLUTE with different bunch charges. We employ a parallel Bayesian optimization algorithm for different bunch charges of FLUTE to find optimized accelerator settings for the generation of intense THz radiation
Feeding Ecology of Juvenile Orange-Spotted Grouper (Epinephelus coioides) and Other Co-Existing Juvenile Fish Species in Coastal Waters of the Lower Gulf of Thailand
āļ§āļīāļāļĒāļēāļāļīāļāļāļāđ (āļ§āļ.āļĄ.(āđāļāļāđāļāđāļĨāļĒāļĩāļāļēāļĢāļāļĢāļ°āļĄāļ))--āļĄāļŦāļēāļ§āļīāļāļĒāļēāļĨāļąāļĒāļŠāļāļāļĨāļēāļāļāļĢāļīāļāļāļĢāđ, 2560āļāļēāļĢāļĻāļķāļāļĐāļēāļāļīāđāļ§āļĻāļ§āļīāļāļĒāļēāļāļēāļāļāļēāļŦāļēāļĢāļāļāļāļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļāļāļāđāļāļāļ§āļąāļĒāļāđāļāļ (Epinephelus coioides) āđāļĨāļ°āļĨāļđāļāļāļĨāļēāļāļāļīāļāļāļ·āđāļāļāļĩāđāļāļēāļĻāļąāļĒāļĢāđāļ§āļĄāļāļąāļāļāļĢāļīāđāļ§āļāļāļ·āđāļāļāļĩāđāļāļēāļĒāļāļąāđāļāļāđāļēāļ§āđāļāļĒāļāļāļāļĨāđāļēāļ āļāļąāđāļāđāļāđāđāļĄāđāļāļēāļāļāđāļģāđāļāļāļē āļāļąāļāļŦāļ§āļąāļāļŠāļāļāļĨāļē āļāļķāļāļāļēāļāđāļĄāđāļāđāļģ Kuala Besut āļĢāļąāļ Terengganu āļāļĢāļ°āđāļāļĻāļĄāļēāđāļĨāđāļāļĩāļĒ āļĢāļ°āļŦāļ§āđāļēāļāđāļāļ·āļāļāļāļąāļāļ§āļēāļāļĄ 2558 āļāļķāļ āđāļāļ·āļāļāļĄāļĩāļāļēāļāļĄ 2559 āđāļāļĒāđāļāđāļāļąāđāļāļĨāđāļāļĨāļđāļāļāļĨāļē āđāļāļ·āđāļāļĻāļķāļāļĐāļēāļāļāļāđāļāļĢāļ°āļāļāļāļāļāļāļāļēāļŦāļēāļĢāđāļāļāļĢāļ°āđāļāļēāļ° āļāļāļ§āđāļē āļāļāļīāļāļāļēāļŦāļēāļĢāļāļĩāđāļāļāđāļāļāļĢāļ°āđāļāļēāļ°āļāļēāļŦāļēāļĢāļĨāļđāļāļāļĨāļēāļāļąāđāļ 5 āļāļāļīāļ āļāļ·āļ āļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļāļāļāđāļāļ (Epinephelus coioides āļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļŦāļēāļāļāđāļāļ (Epinephelus bleekeri) āļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļāļļāļāļāđāļē (Plectropomus leopards) āļĨāļđāļāļāļĨāļēāļāļđāđāļāļēāļ (Butis koilomatodons) āđāļĨāļ° āļĨāļđāļāļāļĨāļēāļāļ°āļāļāļāđāļēāļāļāļēāļ (Lutjanus russelli) āļāļĩāđāļāļēāļĻāļąāļĒāļāļĒāļđāđāļĢāļ§āļĄāļāļąāļ āļāļ·āļ shrimp amphipod āļāļāļīāļ Elasmopus sp. Fish larvae āđāļĨāļ° Megalopa āļāđāļēāļāļēāļĢāđāļāđāļĄāļāļĢāļ°āđāļāļēāļ°āļāļāļāļāļēāļŦāļēāļĢāđāļĨāļ°āļāļģāļāļ§āļāļāļāļīāļāļāļēāļŦāļēāļĢāļĨāļđāļāļāļĨāļēāļāļąāđāļ 5 āļāļāļīāļāļāļīāļāļāļąāđāļ āļĄāļĩāļāļ§āļēāļĄāđāļāļāļāđāļēāļāļāļąāļāļāļĒāđāļēāļāļĄāļĩāļāļąāļĒāļŠāļģāļāļąāļāļĒāļīāđāļ (P<0.001) āļĢāļ°āļŦāļ§āđāļēāļāļĨāļđāļāļāļĨāļēāđāļāđāļĨāļ°āļāļāļīāļ āļāļēāļĢāļāļąāļāļāđāļāļāļāļāļāļāļēāļŦāļēāļĢāļāļāļ§āđāļē āļĢāļ°āļŦāļ§āđāļēāļāļāļĨāļē E. coioides āđāļĨāļ°āļāļĨāļēāļāļĩāļāļŠāļēāļĄāļāļāļīāļ āļāļ·āļ P. leopardus B. koilomatodons L. russellii āļĄāļĩāļāļĪāļāļīāļāļĢāļĢāļĄāļāļēāļĢāđāļĨāļ·āļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĩāđāđāļāļĨāđāđāļāļĩāļĒāļāļāļąāļāļĄāļēāļ āđāļāļāļāļ°āđāļāļĩāļĒāļ§āļāļąāļ āļāļĨāļē E. coioides āļāļąāļāļāļĨāļē E. bleekeri āđāļĨāļ° āļāļĨāļē L. russellii āļāļąāļāļāļĨāļē E. bleekeri āļĄāļĩāļāļĪāļāļīāļāļĢāļĢāļĄāļāļēāļĢāđāļĨāļ·āļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĩāđāđāļāļāļāđāļēāļāļāļąāļ āļāļāļāđāļāļĢāļ°āļāļāļāļāļāļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĩāđāļāļāđāļāļāļĢāļ°āđāļāļēāļ°āļāļĨāļēāļāļ°āļĢāļąāļāļāļāļāđāļāļ āđāļāđāļāļŠāļąāļāļ§āđāļŦāļāđāļēāļāļīāļ āļāļāļīāļāļāļĩāđāļāļāļĄāļēāļāļāļĩāđāļŠāļļāļ āļāļ·āļ shrimp āļĢāļāļāļĨāļāļĄāļē āļāļ·āļ amphipod āļāļāļīāļ Grandidierella sp. āđāļĨāļ° Elasmopus sp. āđāļĨāļ° fish larvae āđāļāđāļāļāļēāļŦāļēāļĢāļāļāļīāļāđāļāđāļāđāļāļāļāļ°āļāļĩāđāļāļāļēāļāļĨāļđāļāļāļĨāļē āļŠāļāļēāļāļĩ āđāļĨāļ°āđāļāļ·āļāļ āļĄāļĩāļāļīāļāļāļīāļāļĨāļāđāļāļāđāļēāļāļēāļŦāļēāļĢāđāļāđāļĄāļāļĢāļ°āđāļāļēāļ°āđāļĨāļ°āļāļģāļāļ§āļāļāļāļīāļāļāļāļāļāļēāļŦāļēāļĢāđāļāļāļĢāļ°āđāļāļēāļ°āļāļēāļŦāļēāļĢāļāļāļāļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļāļāļāđāļāļ (P<0.001) āļāļāļ§āđāļē āļĄāļĩāđāļāļĩāļĒāļāļĨāļđāļāļāļĨāļēāļāļāļēāļāđāļĨāđāļāļāļ§āđāļē 2.00 āđāļāļāļāļīāđāļĄāļāļĢ āđāļĨāļ°āļĨāļđāļāļāļĨāļēāļāļĩāđāļĄāļĩāļāļāļēāļāļĄāļēāļāļāļ§āđāļē 3.01 āđāļāļāļāļīāđāļĄāļāļĢ āđāļāđāļēāļāļąāđāļāļāļĩāđāđāļĄāđāļāļāļāļēāļĢāļāļąāļāļāđāļāļāļāļąāļāļāļāļāļāļēāļŦāļēāļĢ āļĄāļĩāļāļēāļĢāļāļąāļāļāļĨāļļāđāļĄāđāļāļ·āļāļāļāļāļāđāļāđāļāļŠāļāļāļāļĨāļļāđāļĄ āđāļāđāļāļ·āļāļāļāļąāļāļ§āļēāļāļĄ āļĨāļđāļāļāļĨāļēāļāļ°āđāļĨāļ·āļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĨāļļāđāļĄāļĨāļđāļāļāļĨāļēāļāđāļ§āļĒāļāļąāļāļŠāļđāļāļāļ§āđāļēāđāļāļ·āļāļāļāļ·āđāļāđ āđāļĨāļ°āļāļāļ§āđāļēāļĨāļđāļāļāļĨāļēāļāļĩāđāļāļąāļāđāļāđāļāļēāļāļŠāļāļēāļāļĩāđāļāļāļē āļŠāļēāļĒāļāļļāļĢāļĩ āđāļĨāļ° Kuala Besut āļāļ°āđāļĨāļ·āļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĩāđāļĄāļĩāļāļāļāđāļāļĢāļ°āļāļāļāđāļāļĨāđāđāļāļĩāļĒāļāļāļąāļ āļāļ§āļēāļĄāļŠāļąāļĄāļāļąāļāļāđāļĢāļ°āļŦāļ§āđāļēāļāļāļāļēāļāļĨāļđāļāļāļĨāļē āđāļĨāļ°āļāļāļēāļāļāļēāļ āļĄāļĩāļāļīāļāļāļāļĨāļāđāļāļāļāļēāļāļāļēāļŦāļēāļĢāļāļĩāđāļāļāđāļāļāļĢāļ°āđāļāļēāļ°āļāļēāļŦāļēāļĢāļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļāļāļāđāļāļ (P<0.05) āļāđāļēāļāļēāļĢāđāļĨāļ·āļāļāļāļīāļāđāļŠāļāļāđāļŦāđāđāļŦāđāļāļ§āđāļēāļĨāļđāļāļāļĨāļēāļāļ°āļĢāļąāļāļāļāļāđāļāļāđāļĨāļ·āļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĨāļļāđāļĄ amphipods āđāļāļĒāđāļāļ§āđāļāđāļĄāļāļēāļĢāđāļĨāļ·āļāļāļāļīāļāļĨāļāļĨāļāļāļēāļĄāļāļāļēāļāļāļāļāļāļĨāļēāļāļĩāđāđāļāļīāđāļĄāļāļķāđāļ āļĄāļĩāđāļāļ§āđāļāđāļĄāđāļĨāļ·āļāļāļāļīāļ shrimp āđāļĨāļ° fish larvae āđāļāļīāđāļĄāļāļķāđāļāļāļēāļĄāļāļāļēāļāļāļāļāļĨāļđāļāļāļĨāļēāļāļĩāđāđāļāļīāđāļĄāļāļķāđāļ āđāļāļ·āđāļāļāļāļēāļāđāļĄāļ·āđāļāļāļĨāļēāļĄāļĩāļāļāļēāļāđāļŦāļāđāļāļķāđāļ āļāļĨāļēāļāļ°āđāļĨāļ·āļāļāļāļīāļāļāļēāļŦāļēāļĢāļāļĩāđāļĄāļĩāļāļāļēāļāđāļāļīāđāļĄāļāļķāđāļ āđāļāļ·āđāļāđāļŦāđāđāļāļĩāļĒāļāļāļāļāđāļāļāļ§āļēāļĄāļāđāļāļāļāļēāļĢāļāļĨāļąāļāļāļēāļāļāļĩāđāđāļāļīāđāļĄāļāļķāđāļāļāļēāļĄāļāļāļēāļ āļāļēāļĢāļāđāļāļāļ§āđāļēāļāļēāļāļ§āļīāļāļĒāļēāļĻāļēāļŠāļāļĢāđāļāļĩāđāđāļāđāļāļāđāļāļĄāļđāļĨāļŠāļģāļāļąāļāļŠāļģāļŦāļĢāļąāļāļāļēāļĢāļāļģāļāļ§āļēāļĄāđāļāđāļēāđāļāđāļāļĩāđāļĒāļ§āļāļąāļāļāļāļāļēāļāļāļāļāļĢāļ°āļāļāļāļīāđāļ§āļĻāļāļĢāļīāđāļ§āļāļāļēāļāđāļĄāđ āļāļĩāđāļĄāļĩāļāđāļāļāļĪāļāļīāļāļĢāļĢāļĄāļāļēāļĢāđāļŦāđāļāļēāļŦāļēāļĢāļāļāļ E. coioides āđāļĨāļ°āļĨāļđāļāļāļĨāļēāļāļāļīāļāļāļ·āđāļāļāļĩāđāļĄāļĩāļāļĒāļđāđāļĢāđāļ§āļĄāļāļąāļ āđāļĨāļ°āđāļāđāļāļāđāļāļĄāļđāļĨāļāļ·āđāļāļāļēāļāđāļāļāļēāļĢāļāļąāļāļāļēāļĢāļŠāļ āļēāļāđāļ§āļāļĨāđāļāļĄāļāļāļāļāļēāļāđāļĄāđāļāđāļģāđāļĨāļ°āļāļĢāļąāļāļĒāļēāļāļĢāļāļēāļĢāļāļĢāļ°āļĄāļ
Study on feeding ecology of juvenile orange spotted grouper (Epinephelus coioides) and juveniles of co-existing species has been done in coastal waters of lower part of the Gulf of Thailand from Thepa river mouth Songhkhla province to Kuala Besut river mouth, Terengganu, Malaysia during December 2015 and March 2016 collected by mean of fish aggregating devices (FADs) to investigate food composition in fish stomachs. It was found that shrimp, amphipod, fish larvae and megalopa were the five main food items found in the stomachs. Fullness index and number of food item were highly significantly different between these five fish species (P<0.001). Diet overlaps between E. coioides and P. leopardus, B. Koilomatodons and L. Russellii indicated that they consumed slightly similar suit of food items, whereas L. russellii and E. bleekeri fed on different food. Diet composition of E. coioides comprised of benthic organisms especially shrimp, amphipod (Grandidierella sp. and Elasmopus sp.) and fish larvae. Size of fish, study site and month of collection significantly affected fullness index and number of food items in fish stomach (P<0.001) For diet overlap, it was found that only fish smaller than 2.00 cm and 3.01 cm showed no overlapping between them. Based on regression analysis, it was found that fish size and mouth size significantly affected size of food found in the stomach of E. coioides (P<0.05). Result from food selectivity index indicated that they preferred to select Amphipods with the trend of decreasing towards fish size. This scientific finding is crucial information for an understanding of how the nursery role of estuary functions on feeding habits of E. coioides and other co-existing species and serves as basic information in managing both the estuarine environment and the fishery resources
Spontaneous R-Parity violation bounds
We investigate bounds from tree-level and one-loop processes in generic
supersymmetric models with spontaneous R-parity breaking in the superpotential.
We analyse the bounds from a general point of view. The bounds are applicable
both for all models with spontaneous R-parity violation and for explicit
bilinear R-parity violation based on general lepton-chargino and
neutrino-neutralino mixings. We find constraints from semileptonic B, D and K
decays, leptonic decays of the mu and tau, electric dipole moments, as well as
bounds for the anomalous magnetic moment of the muon.Comment: 22 page
Dirac field in topologically massive gravity
We consider a Dirac field coupled minimally to the Mielke-Baekler model of
gravity and investigate cosmological solutions in three dimensions. We arrive
at a family of solutions which exists even in the limit of vanishing
cosmological constant.Comment: 12 pages. Title changed. Conclusion extended. Appendix added. To
appear in Gen. Rel. Gra
Classifying Parkinsonâs Disease Patients With Syntactic and Socio-emotional Verbal Measures
Frontostriatal disorders, such as Parkinsonâs disease (PD), are characterized by progressive disruption of cortico-subcortical dopaminergic loops involved in diverse higher-order domains, including language. Indeed, syntactic and emotional language tasks have emerged as potential biomarkers of frontostriatal disturbances. However, relevant studies and models have typically considered these linguistic dimensions in isolation, overlooking the potential advantages of targeting multidimensional markers. Here, we examined whether patient classification can be improved through the joint assessment of both dimensions using sentential stimuli. We evaluated 31 early PD patients and 24 healthy controls via two syntactic measures (functional-role assignment, parsing of long-distance dependencies) and a verbal task tapping social emotions (envy, Schadenfreude) and compared their classification accuracy when analyzed in isolation and in combination. Complementarily, we replicated our approach to discriminate between patients on and off medication. Results showed that specific measures of each dimension were selectively impaired in PD. In particular, joint analysis of outcomes in functional-role assignment and Schadenfreude improved the classification accuracy of patients and controls, irrespective of their overall cognitive and affective state. These results suggest that multidimensional linguistic assessments may better capture the complexity and multi-functional impact of frontostriatal disruptions, highlighting their potential contributions in the ongoing quest for sensitive markers of PD.Fil: Baez, Sandra. Universidad de los Andes; ColombiaFil: Herrera, Eduar. Universidad Icesi; ColombiaFil: Trujillo, Catalina. Universidad del Valle; ColombiaFil: Cardona, Juan F.. Universidad del Valle; ColombiaFil: Diazgranados, JesÚs A.. Centro MÃĐdico de AtenciÃģn NeurolÃģgica NeurÃģlogos de Occidente; ColombiaFil: Pino, Mariana. Universidad AutÃģnoma del Caribe; ColombiaFil: Santamaria Garcia, Hernando. Consejo Nacional de Investigaciones CientÃficas y TÃĐcnicas; Argentina. Hospital Universitario San Ignacio; Colombia. Pontificia Universidad Javeriana; ColombiaFil: IbaÃąez, Agustin Mariano. Consejo Nacional de Investigaciones CientÃficas y TÃĐcnicas; Argentina. Universidad AutÃģnoma del Caribe; Colombia. Universidad de San AndrÃĐs; Argentina. Universidad Adolfo IbaÃąez; Chile. University of California; Estados UnidosFil: GarcÃa, Adolfo MartÃn. Consejo Nacional de Investigaciones CientÃficas y TÃĐcnicas; Argentina. Universidad de San AndrÃĐs; Argentina. University of California; Estados Unidos. Universidad Catolica de Cuyo. Facultad de Educacion.; Argentin
Broken R-parity, stop decays, and neutrino physics
We discuss the phenomenology of the lightest stop in models where R-parity is
broken by bilinear superpotential terms. In this class of models we consider
scenarios where the R-parity breaking two-body decay ~t_1->\tau^+b competes
with the leading three-body decays such as ~t_1->W^+b~\chi^0_1. We demonstrate
that the R-parity violating decay can be sizable and in some parts of the
parameter space even the dominant one. Moreover we discuss the expectations for
\~t_1->\mu^+b and ~t_1->e^+b. The recent results from solar and atmospheric
neutrinos suggest that these are as important as the tau bottom mode. The
\~t_1->l^+b decays are of particular interest for hadron colliders, as they may
allow a full mass reconstruction of the lighter stop. Moreover these decay
modes allow cross checks on the neutrino mixing angle involved in the solar
neutrino puzzle complementary to those possible using neutralino decays. For
the so--called small mixing angle or SMA solution ~t_1->e^+b should be
negligible, while for the large mixing angle type solutions all ~t_1->l^+b
decays should have comparable magnitude.Comment: 51 pages, 6 figures, LaTeX2e and RevTeX4, published versio
Probing neutrino properties with charged scalar lepton decays
Supersymmetry with bilinear R-parity violation provides a predictive
framework for neutrino masses and mixings in agreement with current neutrino
oscillation data. The model leads to striking signals at future colliders
through the R-parity violating decays of the lightest supersymmetric particle.
Here we study charged scalar lepton decays and demonstrate that if the scalar
tau is the LSP (i) it will decay within the detector, despite the smallness of
the neutrino masses, (ii) the relative ratio of branching ratios Br({tilde
tau}_1 --> e sum nu_i)/ Br({tilde tau}_1 --> mu sum nu_i) is predicted from the
measured solar neutrino angle, and (iii) scalar muon and scalar electron decays
will allow to test the consistency of the model. Thus, bilinear R-parity
breaking SUSY will be testable at future colliders also in the case where the
LSP is not the neutralino.Comment: 24 pages, 8 ps figs Report-no.: IFIC/02-33 and ZU-TH 11/0
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