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11	Computation Of Radar Cross Sections Of Complex Targets By Physical Optics With Modified Surface Normals Durgun, Ahmet Cemal 01 August 2008 (has links) (PDF) In this study, a computer code is developed in MATLAB&reg / to compute the Radar Cross Section (RCS) of arbitrary shaped complex targets by using Physical Optics (PO) and Modified PO. To increase the computational efficiency of the code, a novel fast integration procedure for oscillatory integrals, called Levin&rsquo / s integration, is applied to PO integrals. In order to improve the performance of PO near grazing angles and to model diffraction effects, a method called PO with Modified Surface Normal Vectors is implemented. In this method, new surface normals are defined to model the diffraction mechanism. Secondary scattering mechanisms like multiple scattering and shadowing algorithms are also included into the code to obtain a complete RCS prediction tool. For this purpose, an iterative version of PO is used to account for multiple scattering effects. Indeed, accounting for multiple scattering effects automatically solves the shadowing problem with a minor modification. Therefore, a special code for shadowing problem is not developed. In addition to frequency domain solutions of scattering problems, a waveform analysis of scattered fields in time domain is also comprised into this thesis. Instead of direct time domain methods like Time Domain Physical Optics, a Fourier domain approach is preferred to obtain the time domain expressions of the scattered fields. Frequency and time domain solutions are obtained for some simple shapes and for a complex tank model for differently polarized incident fields. Furthermore, a statistical analysis for the scattered field from the tank model is conducted.
12	An exploratory study of the methods and strategies implemented to integrate unaccompanied minors in five residential home in Sweden Dao, Catherine. H January 2014 (has links) The aim of the study was to explore what methods the personnel in five residential care homes in Götaland, Sweden, implement to integrate unaccompanied minors. The study investigated how and what methods are constructed as well as how the social interaction between the unaccompanied minors and the personnel at the homes bring about the learning of the methods. Five face-to-face semi-structured interviews were conducted and analysed through the perspective of social construction and social learning theory. The result revealed that the methods are not clearly identified by the personnel. The personals are still learning how to work with unaccompanied minors from their experiences. This indicates that the practice is at its infant stage. The study found a wide variety of methods, which were based on the child and where some methods intend to build good relationship, to integrate the children into society and to facilitate the development of strategies and methods. The study also addresses the issue of how the methods and strategies can be affected by the dynamic migratory flow and the question of evidence based practice within this field. Unaccompanied minors residential care homes integration methods construction BBIC action learning distraction support medication leisure activities relationship building drawing using sign language using translate car-method "having a coffee" tutoring ADL-training practical demonstrate explaining networking grocery shopping ART Marte Meo role-model role play 'Hitta Rätt' MI dialogue follow-up meeting house meeting supervision three-part parenthood

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Computation Of Radar Cross Sections Of Complex Targets By Physical Optics With Modified Surface Normals

An exploratory study of the methods and strategies implemented to integrate unaccompanied minors in five residential home in Sweden