In the one-loop approximation for Euclidean quantum gravity, the boundary conditions which are completely invariant under gauge transformations of metric perturbations cannot be written in terms of complementary projection operators. By contrast, they express the h00 and h0i perturbations at the boundary as integrals at the boundary of the action of a set of di erential operators on metric pert...

Purpose This brief note sheds light on the links between Journal of Economic Literature (JEL) codes and Sustainable Development Goals (SDGs) United Nations. Design/methodology/approach Three alternative methods based keyword overlap to establish SDGs JEL are presented. Findings These simple linkages illustrate that themes have corresponding closely related classification codes. Research limitat...

MALDI mass spectrometry imaging (MALDI-MSI) is currently used for clinical applications, such as biomarker identification, particularly for the study of solid tumors. The ability to map specific compounds that have been determined to be biomarkers and therapeutic targets is relevant for the evaluation of the efficacy of targeted therapies. This article describes a new method called Spectro-Immu...

Asteroseismology of the planet-hosting star µ Arae. II. Seismic analysis. Abstract. As most exoplanets host stars, HD 160691 (alias µ Ara) presents a metallicity excess in its spectrum compared to stars without detected planets. This excess may be primordial, in which case the star would be completely over-metallic, or it may be due to accretion in the early phases of planetary formation, in wh...