This study configures the Weather Research and Forecasting (WRF) model with updated urban fraction for optimal rainfall simulation over Kampala, Uganda. The parameter values associated fractions are adjusted based on literature reviews. An extreme event that triggered a flood hazard in Kampala 25 June 2012 is used simulation. Observed from two gauging stations satellite Climate Hazards Group In...

This study describes implementation of hydrological climate change impact assessment tool utilising a combination of statistical spatiotemporal downscaling and an operational hydrological model known as the Nile Forecasting System. A spatial rainfall generator was used to produce high-resolution (daily, 20km) gridded rainfall data required by the distributed hydrological model from monthly GCM ...

We propose a new procedure to embed second class systems by introducing Wess-Zumino (WZ) fields in order to unveil hidden symmetries existent in the models. This formalism is based on the direct imposition that the new Hamiltonian must be invariant by gauge-symmetry transformations. An interesting feature in this approach is the possibility to find a representation for the WZ fields in a conven...

We derive both Lagrangian and Hamiltonian mechanics as gauge theories of Newtonian mechanics. Systematic development of the distinct symmetries of dynamics and measurement suggest that gauge theory may be motivated as a reconciliation of dynamics with measurement. Applying this principle to Newton’s law with the simplest measurement theory leads to Lagrangian mechanics, while use of conformal m...

By considering representation theory for non-associative algebras we construct the fundamental and adjoint representations of the octonion algebra. We then show how these representations by associative matrices allow a consistent octonionic gauge theory to be realized. We find that non-associativity implies the existence of new terms in the transformation laws of fields and the kinetic term of ...

This study aims to project future sea-level rise (SLR) at the Phrachula Chomklao Fort (PCF) tide gauge station in Upper Gulf of Thailand (UGoT) using outputs 35 climate models under two greenhouse gas concentration scenarios: representative pathway 4.5 (RCP4.5) and RCP8.5. The Linear Scaling method was found be better than Variance Quantile Mapping methods for removing biases raw Global Circula...

Computing partition function is the most important statistical inference task arising in applications of Graphical Models (GM). Since it is computationally intractable, approximate methods have been used in practice, where mean-field (MF) and belief propagation (BP) are arguably the most popular and successful approaches of a variational type. In this paper, we propose two new variational schem...

Previously (Z. Angew. Math. Phys. 57:615–622, 2006), we examined the axisymmetric stability of viscous resistive magnetized Couette flow with emphasis on flows that would be hydrodynamically stable according to Rayleigh’s criterion: opposing gradients of angular velocity and specific angular momentum. A uniform axial magnetic field permeates the fluid. In this regime, magnetorotational instabil...

In the Bering Sea around and off Yukon River delta, surface sediment plumes are markedly formed by glacier-melt rainfall runoffs of River, Alaska, in June– September. The discharge load time series were obtained at lowest gauging station US Geological Survey June 2006–September 2010. Meanwhile, coastal observations on boat, it was found out that river plume plunges a boundary between turbid wat...

For estimation of monthly precipitation, considering the intricacy and lack of accurate knowledge about the physical relationships, black box models usually are used because they produce more accurate values. In this article, a hybrid black box model, namely ANN-RBF, is proposed to estimate spatiotemporal value of monthly precipitation. In the first step a Multi Layer Perceptron (MLP) network i...