This paper presents a study about the Longley-Rice model and its applicability in urban settings located in tropical areas. For this, the model has been modeled computationally for MatLab platform. The LRM (Longley-Rice Modified) algorithm has been calibrated and validated with reference values for analysis of the radio signal attenuation measured in Belo Horizonte. These data are evaluated for...

In the surgery of tropical medicine, two stages are passed through. The recently arrived surgeon in India tends to operate without consideration of such diseases as amcebiasis which mimic surgical conditions of European practice; also he tends to overlook, the effects of a hot climate. After initial mistakes, there is a tendency to diagnose tropical diseases when they are not present, and there...

Tropical cyclone (TC) tornado prediction remains a substantial challenge, both on its own and compared to advances made in prognostically relevant understanding of midlatitude supercells in particular. An ingredients-based approach (e.g., Johns and Doswell 1992), used for supercell tornado environments in midlatitudes, likewise can be applied to TCs, focusing on moisture, instability, vertical ...

The purpose of this article is twofold. The first is to point out and correct several misconceptions about the putative WISHE mechanism of tropical cyclone intensification that currently are being taught to atmospheric science students, to tropical weather forecasters, and to laypeople who seek to understand how tropical cyclones intensify. The mechanism relates to the simplest problem of an in...

In the first part of this chapter, we give a review of the relationship of climate and tropical cyclones on various time scales, from intra-seasonal to decadal. The response of tropical cyclone activity to natural modes of variability, such as El Niño-Southern Oscillation and the Madden Julian Oscillation in various regions of the world are discussed. Genesis location, track types and intensity...

This paper introduces the foundations of the polynomial algebra and basic structures for algebraic geometry over the extended tropical semiring. Our development, which includes the tropical version for the fundamental theorem of algebra, leads to the reduced polynomial semiring – a structure that provides a basis for developing a tropical analogue to the classical theory of commutative algebra....

I study tropical geometry, in particular tropical curves, moduli, and determinantal varieties. I have written five papers in tropical geometry: three on tropical curves and their moduli [Cha11a, Cha11b, CMV11], and two on tropical determinantal varieties [CC09, CJR09], joint with D. Cartwright, A. N. Jensen, and E. Rubei. After a brief introduction to tropical geometry, I will propose four main...

Following the recent work of Develin and Sturmfels and others (see, e.g., [10, 16, 2, 11]), we investigate discrete geometric questions over the tropical semiring (R, min, +). Specifically, we obtain the following tropical analogues of classical theorems in convex geometry: a separation theorem for a pair of disjoint tropical polytopes by tropical halfspaces and tropical versions of Radon’s lem...

1PM: Oleg Viro (Stony Brook). Multifields (fields with multivalued addition), base fields of tropical geometries. Abstract:In many classical number sets (e.g., complex numbers, real numbers and non-negative real numbers), there are remarkable structures of multifield. Replacing the tropical max-plus semifield in the foundations of tropical geometry by a multifield simplifies the structure of tr...

Tobias Brummaier *, Clare Ling , Cindy S. Chu , Vanaporn Wuthiekanun , Warat Haohankhunnatham, Rose McGready a,b a Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Mae Sot, Thailand Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, Oxford, UK Mahidol-Oxford Tropical Medicine Researc...