Two-dimensional Banach spaces with Polynomial numerical index zero

We study two-dimensional Banach spaces with polynomial numerical indices equal to zero.Comment: 12 pages, to appear in Linear Algebra App

Airport mobile internet an innovation

This paper studies the adoption of mobile Internet by airports. Using a new theoretical model, the study tests whether early adopters of mobile Internet for airports can be considered real innovators. Seventy-five international airports from four different geographical areas and of three different sizes are analyzed. The paper complements the analysis with an additional innovation adoption, the PC-Website, and two dimensions are analyzed: the time of adoption and the degree of maturation. Our findings show that there are four real innovator airports: London Heathrow, London Stansted, Amsterdam Schiphol and Copenhagen. Airport innovation is found to be related to geographical location and commercial revenue rather than to airport size. The four real innovator airports iPhone apps are used as case studies to identity best practices for the delivery of airport mobile services

Round table & closing of 2nd Istanbul Hub Seminar airline strategies for the opening of the new airport in Istanbul

The round table included most of the speakers of the seminar and covered the following topics: Extra capacity for the Istanbul Sabiha Gokcen International airport, implication of bilateral agreements multilateral agreements between Turkey and the EU members, airlines merger and acquisitions of airlines in Turkey and was completed with suggestions to students about the aviation sector.Seminer konuşmacılarının çoğunun katıldığı yuvarlak masa tartışmasında Sabiha Gökçen Havalimanı için planlanan kapasite artırımı, Avrupa Birliği ve Türkiye arasında ikili veya çoklu havacılık anlaşmalarının olası sonuçları ve Türkiye’deki havayolu şirketlerinin birleşme ve satın alma ihtimalleri ele alınmış; son olarak da öğrencilere havacılık sektörüyle ilgili bazı tavsiyelerde bulunulmuştur

Round table & closing of 2nd Istanbul Hub Seminar airline strategies for the opening of the new airport in Istanbul

The round table included most of the speakers of the seminar and covered the following topics: Extra capacity for the Istanbul Sabiha Gokcen International airport, implication of bilateral agreements multilateral agreements between Turkey and the EU members, airlines merger and acquisitions of airlines in Turkey and was completed with suggestions to students about the aviation sector.Seminer konuşmacılarının çoğunun katıldığı yuvarlak masa tartışmasında Sabiha Gökçen Havalimanı için planlanan kapasite artırımı, Avrupa Birliği ve Türkiye arasında ikili veya çoklu havacılık anlaşmalarının olası sonuçları ve Türkiye’deki havayolu şirketlerinin birleşme ve satın alma ihtimalleri ele alınmış; son olarak da öğrencilere havacılık sektörüyle ilgili bazı tavsiyelerde bulunulmuştur

NGF, TrkA-P and neuroprotection after a hypoxic event in the developing central nervous system

A decrease in the concentration of oxygen in the blood and tissues (hypoxia) produces important, sometimes irreversible, damages in the central nervous system (CNS) both during development and also postnatally. The present work aims at analyzing the expression of nerve growth factor (NGF) and p75 and the activation of TrkA in response to an acute normobaric hypoxic event and to evaluate the possible protective role of exogenous NGF. The developing chick optic tectum (OT), a recognized model of corticogenesis, was used as experimental system by means of in vivo and in vitro studies. Based on identification of the period of highest sensitivity of developmental programmed cell death (ED15) we show that hypoxia has a mild but reproducible effect that consist of a temporal increase of cell death 6 h after the end of a hypoxic treatment. Cell death was preceded by a significant early increase in the expression of Nerve Growth Factor (NGF) and its membrane receptor p75. In addition, we found a biphasic response of TrkA activation: a decrease during hypoxia followed by an increase −4 h later- that temporally coincide with the interval of NGF overexpression. To test the NGF - NGF receptors role in hypoxic cell death, we quantified, in primary neuronal cultures derived from ED15 OT, the levels of TrkA activation after an acute hypoxic treatment. A significant decline in the level of TrkA activation was observed during hypoxia followed, 24 h later, by significant cell death. Interestingly, this cell death can be reverted if TrkA inactivation during hypoxia is suppressed by the addition of NGF. Our results suggest that TrkA activation may play an important role in the survival of OT neurons subjected to acute hypoxia. The role of TrkA in neuronal survival after injury may be advantageously used for the generation of neuroprotective strategies to improve prenatal insult outcomes.Fil: Bogetti, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencia "Prof. Eduardo de Robertis". Universidad de Buenos Aires. Facultad de Medicina. Instituto de Biología Celular y Neurociencia; ArgentinaFil: Pozo Devoto, Victorio Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencia "Prof. Eduardo de Robertis". Universidad de Buenos Aires. Facultad de Medicina. Instituto de Biología Celular y Neurociencia; ArgentinaFil: Rapacioli, Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Neurociencia Cognitiva. Fundación Favaloro. Instituto de Neurociencia Cognitiva; ArgentinaFil: Flores, Domingo Vladimir. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Neurociencia Cognitiva. Fundación Favaloro. Instituto de Neurociencia Cognitiva; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencia "Prof. Eduardo de Robertis". Universidad de Buenos Aires. Facultad de Medicina. Instituto de Biología Celular y Neurociencia; ArgentinaFil: Fiszer de Plazas, Sara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Biología Celular y Neurociencia "Prof. Eduardo de Robertis". Universidad de Buenos Aires. Facultad de Medicina. Instituto de Biología Celular y Neurociencia; Argentin

Updating Bounds on RR-Parity Violating Supersymmetry from Meson Oscillation Data

We update the bounds on $R$-parity violating supersymmetry originating from meson oscillations in the $B^0_{d/s}$ and $K^0$ systems. To this end, we explicitly calculate all corresponding contributions from $R$-parity violating operators at the one-loop level, thereby completing and correcting existing calculations. We apply our results to the derivation of bounds on $R$-parity violating couplings, based on up-to-date experimental measurements. In addition, we consider the possibility of cancellations among flavor-changing contributions of various origins, e.g. from multiple $R$-parity violating couplings or $R$-parity conserving soft terms. Destructive interferences among new-physics contributions could then open phenomenologically allowed regions, for values of the parameters that are naively excluded when the parameters are varied individually.Comment: 53 pages, 10 figures, 2 tables; final versio

Algebras of functions with prescribed radii of boundedness and the spectra of H(u)

We study the spectra of algebras of holomorphic functions with prescribed radii of boundedness, and use these results to study the τω and τδ spectra of H(U), where U is an open subset of a non-separable Banach space. We construct τδ continuous characters on H(U) which are not evaluations at points of U. We also discuss subsets of ℓ∞ which are bounding for H(U), U⊂ℓ∞.Fil: García, Domingo. Universidad de Valencia; EspañaFil: Maestre, Manuel. Universidad de Valencia; EspañaFil: Zalduendo, Ignacio Martin. Universidad Torcuato Di Tella. Departamento de Matemáticas y Estadística; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin