1,721,216 research outputs found
A reduction method for periodic solutions of second order subquadratic equations
No full textThe problem of the search for periodic solutions to certain second-order scalar subquadratic equations is reduced, by means of a variational argument, to the study of a real function of one variable, the "reduction function" of the problem. Existence and multiplicity of solutions for the original problem and for its perturbations are linked to the properties of the reduction function. Equivalent conditions for the perturbability of the problem as well as genericity results and descriptions of the range of the differential operator are obtained. Applications cover equations with oscillating or bounded nonlinearities or strongly resonant problems
Non-continuation of the periodic oscillations of a forced pendulum in the presence of friction
No full textMultiplicity Results for Boundary Value Problemswith Potentials Oscillating around Resonance
No full text
Editorial: Endocrine malignancies: from pathophysiology to current clinical and surgical therapeutic approaches
Full text linkEndocrine tumors of the thyroid, parathyroid, and adrenal glands are a significant and
complex medical issue that affects millions of people worldwide. These tumors can lead to a
variety of serious conditions, including hyperthyroidism, hypothyroidism, hyperparathyroidism
(1), and pheochromocytoma (2); moreover endocrine tumors can be benign or malignant, and
their diagnosis and treatment require a multidisciplinary approach involving endocrinologists,
radiologists (3), pathologists, and surgeons. In recent years, significant progress has been made
in our understanding of the pathophysiology of endocrine tumors, as well as in the development
of new diagnostic and therapeutic approaches. Hence, this Research Topic aims to provide an
up-to-date overview of endocrine tumors, from their pathophysiology to current clinical and
surgical therapeutic approaches. The Research Topic includes contributions from leading
experts in the field, covering a broad range of topics related to endocrine tumors. The articles in
this Research Topic cover the variability of development and the importance of the latest
advances in managing thyroid tumors and its debated topics such as lymph node metastasis,
central neck dissection, micrometastasis and ectopic tumors
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
