and vectors. This tutorial reviews the basic ideas surrounding points and vectors in affine and projective spaces. In Part 1 of this tutorial I advocate vector geometric analysis to simplify required derivations and implementations. Part 2 in the next issue builds on this background and shows several specific applications of these techniques. I f you had a lump of clay and wanted to make a bowl...

Using Donnell-type shell theory a simple and exact procedure is presented for linear buckling analysis of functionally graded conical shells under axial compressive loads and external pressure. The solution is in the form of a power series in terms of a particularly convenient coordinate system. By analyzing the buckling of a series of conical shells, under various boundary conditions and diffe...

energy equation for turbulent flow in a rotating system was derived in terms of second order correlation tensors, where the correlation tensors were functions of space coordinates, distance between two points and time. to reveal the relationship of turbulent energy between two points, one point was taken as origin of the coordinate system. due to rotation, the coriolis force played an important...

Calibration in a multi camera network has widely been studied for over several years starting from the earlier days of photogrammetry. Many authors have presented several calibration algorithms with their relative advantages and disadvantages. In a stereovision system, multiple view reconstruction is a challenging task. However, the total computational procedure in detail has not been presented...

in this paper effects of fractured sleepers on rail track vibration under moving wheelset have been investigated. two parallel rails of the track have been modeled as euler-bernoulli beams on elastic points as rail pads. also sleepers have been modeled as visco-elastic euler-bernoulli beams. it is assumed that, some sleepers under the rail track have been fractured and modeled by two beams. the...

This note describes a numerically stable procedure to derive a canonical coordinate system for a 2D linear transformation. The determinant of the transformation from the given coordinate system to the canonical coordinate system is 1; thus area is preserved. The transformation is composed of a short sequence of rotations and areapreserving nonuniform scales. If the eigenvectors are real, they m...

Studying the Digital Gender Divide in African countries, including Egypt, is considered vital for social and economic development. It is an established fact that one of the UN Millennium Development Goals is gender equality and the empowerment of women. Information and Communication Technology (ICT) can be the vehicle to achieve this goal. This study applies econometric techniques to shed some ...

Fashion magazines contain a number of photographs of fashion models, and their clothing coordinates serve as useful references. In this paper, we propose a recommender system for clothing coordinates using full-body photographs from fashion magazines. The task is that, given a photograph of a fashion item (e.g. tops) as a query, to recommend a photograph of other fashion items (e.g. bottoms) th...

Vast amount of geospatial datasets are now available through numerous public and private organizations. These datasets usually cover different areas, have different accuracy and level of details, and are usually provided in the vector data format, where the latitude and longitude of each object is clearly specified. However, there are scenarios in which the spatial attributes of the objects are...

Tactile maps constitute the media most commonly used by blind and partially sighted people for the exploration of spatial information. However, compared to maps for sighted people, they are inconvenient to produce and contain less information. We have developed methods and implemented them prototypically, by which visually impaired people can explore a geographical area flexibly with the help o...