BACKGROUND The filamentous fungus Aspergillus niger is a widely used strain in a broad range of industrial processes from food to pharmaceutical industry. One of the most intriguing and often uncontrollable characteristics of this filamentous organism is its complex morphology, ranging from dense spherical pellets to viscous mycelia depending on culture conditions. Optimal productivity correlat...

The steady two-dimensional stagnation point flow of a non-Newtonian Walters' B' fluid with slip is studied. The fluid impinges on the wall either orthogonally or obliquely. A finite difference technique is employed to obtain solutions. 1. Introduction. Some rheologically complex fluids such as polymer solutions, blood, paints, and certain oils cannot be adequately described by the Navier-Stokes...

Extension of the en-method from two-dimensional to three-dimensional boundary-layer flows has not been straightforward. Confusion has centred on whether to use temporal or spatial stability theories, conversion between the two approaches, and the choice of integration path. The aim of this study is to clarify the confusion about the direction and magnitude of maximum growth in convectively unst...

This work is concerned with stability and receptivity analysis as well as studies on control of the laminar-turbulent transition in boundary-layer flows through direct numerical simulations. Various flow configurations, both twoand threedimensional boundary layers, are considered to address flow around straight and swept wings. The aim of this study is to contribute to a better understanding of...

Biotibbi görüntüləmə üçün istifadə edilən hər hansı nüfuzedici şüalanmaya qoyulan əsas tələblər onun yayılmasının həndəsi cəhətdən proqnozlaşdırıla bilən olması, mühitdə zəifləmənin çox güclü olmaması və bu şüalanmanın canlı orqanizmə təsirinin mümkün qədər zərərsiz olmasıdır. Bu difraksiya ilə müəyyən istiqamətinin tələb olunan məkan ayırdetmə qabiliyyətinə uyğun olacağı tezliklərdə yerinə yet...

This thesis contributes to segmentation of grey-scale images. Two principal and independent approaches are exploited: rst, an application of graphs to the h-minima operator used for segmentation of multi-class images and second, a topology-oriented segmentation of 3-D, X-rays liver angiography (CTA). In the rst part of the manuscript, we present a review of some existing mathematical models use...