This paper presents a location–price equilibrium problem on a tree. A sufficient condition for having a Nash equilibrium in a spatial competition model that incorporates price, transport, and externality costs is given. This condition implies both competitors are located at the same point, a vertex that is the unique median of the tree. However, this is not an equilibrium necessary condition. S...

1 Department of Hospital Pharmacy, Hospital Universitario Materno-Infantil de Canarias, Las Palmas de Gran Canaria, Spain 2 Community Pharmacy, Las Palmas de Gran Canaria, Spain 3 Department of Nuclear Medicine, Clínica Universitaria, Universidad de Navarra, Pamplona, Spain 4 Department of Allergy, Hospital Universitario La Princesa, Madrid, Spain 5 Department of Ophthalmology, Hospital Univers...

1 Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia, A.A. 14490, Bogotá, D.C, Colombia. 571-3165000 ext. 14662 2 Instituto Universitario de Bio-Orgánca “Antonio González”, Universidad de La Laguna, Avda. Astrofísico. Francisco Sánchez 2, La Laguna, 38206, Tenerife, Islas Canarias, España 3 Instituto de Química y Fisicoquímica Biológicas, Facultad de Farmacia y Bio...

Spectropolarimetric time series data of the primary spot of active region NOAA 9448 were obtained in the Si i 10827 Å line and the He i 10830 Å multiplet with the Tenerife Infrared Polarimeter. Throughout the time series the spectrograph slit was fixed over a region covering umbra, a light bridge, penumbra, and quiet sun. We present speeds of running penumbral waves in the chromosphere, their r...

al. Maria M. Bauzà-Ribot,1 Carlos Juan, 1 Francesco Nardi, 2 Pedro Oromí, 3 Joan Pons, 4 and Damià Jaume4 Departament de Biologia, Universitat de les Illes Balears, 07122 Palma, Spain Department of Life Sciences, University of Siena, via Aldo Moro 2, 53100 Siena, Italy Departmento de Biología Animal, Universidad La Laguna, 38205 La Laguna, Tenerife, Canary Islands, Spain IMEDEA (CSIC-UIB), Medi...

5 Max-Planck-Institut [iir Extraterrestrische Physik, Giessenbachstrasse, D-8046, Garching bei Munchen, Germany "Astronomical Institute, National Observatory of Athens, PO Box 200048, GR-118 10, Athens, Greece 7 Institute for Astronomy, University of Edinburgh, Blackford Hil~ Edinburgh EH9 3HJ "Institute of Astronomy, The Observatories, Madingley Road, Cambridge CB30HA "Danish Space Research In...

We present observations at 10 and 15 GHz taken with the Tenerife experiments in a band of the sky at Dec.=+35. These experiments are sensitive to multipoles in the range l = 10− 30. The sensitivity per beam is 56 and 20 μK for the 10 and the 15 GHz data, respectively. After subtraction of the prediction of known radio-sources, the analysis of the data at 15 GHz at high Galactic latitude shows t...

BACKGROUND The island factor of the cities of Las Palmas de Gran Canaria and Santa Cruz de Tenerife, along with their proximity to Africa and their meteorology, create a particular setting that influences the air quality of these cities and provides researchers an opportunity to analyze the acute effects of air-pollutants on daily mortality. METHODS From 2000 to 2004, the relationship between...

Geographical variation among contiguous populations is frequently attributed to ecological divergence or historical isolation followed by secondary contact. Distinguishing between these effects is key to studies of incipient speciation and could be revealed by different genomic signatures. We used RAD-seq analyses to examine morphologically divergent populations of the endemic lizard (Gallotia ...

The blazar Markarian 501 (Mrk 501) was observed at energies above 0.10 TeV with the MAGIC telescope from May through July 2005. The high sensitivity of Universität Würzburg, D-97074 Würzburg, Germany IFAE, Edifici Cn., E-08193 Bellaterra (Barcelona), Spain ETH Zurich, CH-8093 Switzerland Universidad Complutense, E-28040 Madrid, Spain Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain ...