Calibrating multiple projectors to create a distortion free environment is required in many fields e.g. simulators and the calibration may be done in a series different ways. This report will cover an automatic single camera projector calibration algorithm.The algorithm handles multiple projectors and can handle projectors covering bigger field of view than a camera by supporting image stitching. A proof of concept blending algorithm is also presented. The algorithm includes a new developed interpolation method building on spline surfaces and an orientation calculation algorithm that calculates the orientation difference between two camera views. Using the algorithm to calibrate, gives pixel accuracy of less than 1 camera pixel after interpolation and the relation between two views are calculated accurately. The images created using the algorithm is distortion free and close to seamless. The algorithm is limited to a controlled projector environment and calibrates the projectors for a single viewpoint. Furthermore, the camera needs to be calibrated positioned in the sweet spot although it can be arbitrary rotated.

The grid voltage is normally required to avoid transient current of the inverter due to asynchronously grid-paralleling connection. This paper presents a seamless transition method to allow the inverter to connect to the grid at any time with no requirement of the grid voltage. The control of the inverter consists of the droop control and the riding-through control. In the droop-controlled mode, the inverter can connect to the utility and supply power according to its rated capacity. On the other hand, the riding-through mode is proposed to suppress the transient current due to asynchronous paralleling. In this mode, the zero-current control is realized to reduce transient current and a phase-locked loop is designed to correct the angle of the inverter output voltage. In addition, the virtual inductance is implemented to improve transient current resulting from the mode transition back to the droop control mode. Design considerations of the seamless transition method are provided and test results are conducted to verify its effectiveness.

Efficient and robust numerical simulation of multiscale problems encountered in science and engineering is a formidable challenge. Full resolution of multiscale problems using direct numerical simulations requires enormous amounts of computational time and resources. This thesis develops seamless multiscale methods for ordinary and partial differential equations under the framework of the heterogeneous multiscale method (HMM). The first part of the thesis is devoted to the development of seamless multiscale integrators for ordinary differential equations. The first method, which we call backward-forward HMM (BFHMM), uses splitting and on-the-fly filtering techniques to capture slow variables of highly oscillatory problems without any a priori information. The second method, denoted by variable step size HMM (VSHMM), as the name implies, uses variable mesoscopic step sizes for the unperturbed equation, which gives computational efficiency and higher accuracy. VSHMM can be applied to dissipative problems as well as highly oscillatory problems, while BFHMM has some difficulties when applied to the dissipative case. The effect of variable time stepping is analyzed and the two methods are tested numerically. Multi-spatial problems and numerical methods are discussed in the second part. Seamless heterogeneous multiscale methods (SHMM) for partial differential equations, especially the parabolic case without scale separation are proposed. SHMM is developed first for the multiscale heat equation with a continuum of scales in the diffusion coefficient. This seamless method uses a hierarchy of local grids to capture effects from each scale and uses filtering in Fourier space to impose an artificial scale gap. SHMM is then applied to advection enhanced diffusion problems under incompressible turbulent velocity fields. / text

Synoptic global remote sensing provides a multitude of land surface state variables. The continuous collection, for more than 30 years, of global observations has contributed to the creation of a unique and long term satellite imagery archive from different sensors. These records have become an invaluable source of data for many environmental and global change related studies. The problem, however, is that they are not readily available for use in research and application environment and require multiple preprocessing. Here, we looked at the daily global data records from the Advanced Very High Resolution Radiometer (AVHRR) and the Moderate Resolution Imaging Spectroradiometer (MODIS), two of the most widely available and used datasets, with the objective of assessing their quality and suitability to support studies dealing with global trends and changes at the land surface. Findings show that clouds are the major data quality inhibitors, and that the MODIS cloud masking algorithm performs better than the AVHRR. Results show that areas of high ecological importance, like the Amazon, are most prone to lack of data due to cloud cover and aerosols leading to extended periods of time with no useful data, sometimes months. While the standard approach to these challenges has been compositing of daily images to generate a representative map over a preset time periods, our results indicate that preset compositing is not the optimal solution and a hybrid location dependent method that preserves the high frequency of these observations over the areas where clouds are not as prevalent works better. Using this data quality information the Vegetation Index and Phenology (VIP) Laboratory at The University of Arizona produced over 30 years of seamless sensor independent record of vegetation indices and land surface phenology metrics. These data records consist of 0.05-degree resolution global images for daily, 7-days, 15-days and monthly temporal frequency. These sort of remote sensing based products are normally made available through the internet by large data centers, like the Land Processes Distributed Active Archive Center (LP DAAC), however, in this project an online tool, the VIP Data Explorer, was developed to support the visualization, exploration, and distribution of these Earth Science Data Records (ESDRs) keeping it closer to the data generation center which provides a more active data support and distribution model. This web application has made it possible for users to explore and evaluate the products suite before download and use.

Darbe nagrinėjamos problemos, susijusios su šalies valdyme reikalingais pokyčiais. Naujoji paradigma - į vartotojus orientuotos suasmenintos paslaugos nagrinėjamos dviem aspektais: per sąveikios valdžios koncepciją, bei per besiūlių paslaugų modelį. Šios temos aktualumas grindžiamas didėjančiu informacinių technologijų poveikiu kuriant visuomenės gerovę. Pasaulyje formuojasi naujosios valdymo paradigmos, kurios reikalauja kokybiškumo bei didesnio efektyvumo, įtvirtinant orientaciją į vartotojus ir akcentuojant naują požiūrį į valdžios ir visuomenės bendradarbiavimą. Kai kuriose šalyse sąveikios valdžios ir besiūlių paslaugų koncepcija, užtikrinanti orientaciją į vartotojus, pamažu ima plisti. Lietuvoje šiuo metu gali būti įžvelgiama e. valdžios raida link sąveikios valdžios, tačiau ji vyksta lėtai, nėra pakankamai apčiuopiamų ir reikšmingų rezultatų. Viso darbo tikslas – išanalizuoti sąveikios valdžios ir besiūlių paslaugų modelius, raidos tendencijas ir taikymo galimybes. Tyrimo tikslas - pagal pasirinktus kriterijus įvertinti esamą situaciją Lietuvoje, nustatyti naujo modelio diegimo galimybes ir problemines sritis. Tyrimas atskleidė, jog pagrindiniai trukdžiai, kurie neigiamai veikia sąveikios valdžios ir besiūlių paslaugų formavimą yra susiję su žmogiškuoju indėliu. Darbe pateikti pagrindiniai pasiūlymai, kurie padėtų situaciją pakeisti, o jų įgyvendinimas taptų pirmuoju žingsniu Lietuvai einant link orientacijos į vartotojus, per sąveikios valdžios ir besiūlių paslaugų... [toliau žr. visą tekstą] / Master thesis analyses problems related to changes necessary in the governing system of the country. Citizen-centric services are analysed from two points of view: through the concept of ‘connected government‘ and through the model of seamless services. The importance of the topic is based on the increasing impact of information technologies on the establishment of public welfare. New paradigms of administration, requiring quality and higher efficiency, are forming in the world and citizen-centric and new attitude towards cooperation between the society and government bodies are gaining stronger position. Overview of foreign practices allows to draw a conclusion that the concept of ‘connected government‘ and seamless services, ensuring citizen-centrics is starting to spread. The headway of the government of Lithuania towards ‘connected government‘ can be observed but it is slow, without visible and significant results. The overall aim of the thesis is to analyse the models of ‘connected government‘ and seamless services, the tendencies of their development and possibilities of application. A survey of present situation in Lithuania based on chosen criteria and to define the possibilities of implementation of the new model and possible problematic fields. The survey has shown that the main obstacles, that have negative influence on the formation of ‘connected government‘ and seamless services are related to human contribution. The thesis provides main propositions how to... [to full text]

The main legislation governing environmental authorisation in South Africa is the National Environmental Management Act, 107 of 1998 (NEMA). This legislation is administered by the environmental affairs departments at national, provincial and local spheres of government. Besides NEMA, there are other pieces of legislation which govern environmental authorisation and, in some instances, are administered by other organs of state. They, like NEMA, require submission of reports to authorities for decision-making. This may result in cumbersome and duplication of processes; which in turn, may delay the initiation of development activities. NEMA provides for co-operative governance, coordination of activities and alignment of processes to counter the above problems. Section 24L states that activities regulated in another law may be regarded as sufficient for authorisation in terms of NEMA, and vice versa. Furthermore, section 24K provides for consultation and coordination of legislative requirements to avoid duplication. Flowing from these provisions is that competent authorities may exercise their powers by issuing separate or integrated authorisations. All these provisions aim to promote smooth and seamless interactions between all key role-players involved in authorisation processes. However, there are widespread concerns amongst key role-players and the public at large about the lack of application and/or implementation of the foregoing legislative provisions. This study investigates these concerns through a literature review, case study analysis and administration of a questionnaire. The results show that the fruits of these provisions (i.e. coordinated activities, aligned processes and/or integrated authorisations) in the province of KwaZulu-Natal have yet to be realised. This study recommends, therefore, that clear guidance be provided to provinces on how to implement the legislative provisions described above. / Thesis (M. Environmental Management)--North-West University, Potchefstroom Campus, 2013.

The main legislation governing environmental authorisation in South Africa is the National Environmental Management Act, 107 of 1998 (NEMA). This legislation is administered by the environmental affairs departments at national, provincial and local spheres of government. Besides NEMA, there are other pieces of legislation which govern environmental authorisation and, in some instances, are administered by other organs of state. They, like NEMA, require submission of reports to authorities for decision-making. This may result in cumbersome and duplication of processes; which in turn, may delay the initiation of development activities. NEMA provides for co-operative governance, coordination of activities and alignment of processes to counter the above problems. Section 24L states that activities regulated in another law may be regarded as sufficient for authorisation in terms of NEMA, and vice versa. Furthermore, section 24K provides for consultation and coordination of legislative requirements to avoid duplication. Flowing from these provisions is that competent authorities may exercise their powers by issuing separate or integrated authorisations. All these provisions aim to promote smooth and seamless interactions between all key role-players involved in authorisation processes. However, there are widespread concerns amongst key role-players and the public at large about the lack of application and/or implementation of the foregoing legislative provisions. This study investigates these concerns through a literature review, case study analysis and administration of a questionnaire. The results show that the fruits of these provisions (i.e. coordinated activities, aligned processes and/or integrated authorisations) in the province of KwaZulu-Natal have yet to be realised. This study recommends, therefore, that clear guidance be provided to provinces on how to implement the legislative provisions described above. / Thesis (M. Environmental Management)--North-West University, Potchefstroom Campus, 2013.

Thesis (MEng) -- Stellenbosch University, 2014. / ENGLISH ABSTRACT: The ever-increasing existence of electronic systems and devices within the residential environment, along with the human desire to simplify life and daily routine, is generating increased interest in the field of home automation (HA) and intelligent environments. A large variety of home automation solutions have been conceptualised or developed. However, many of these solutions are designed by experts and require professionals to install and/or operate them. Furthermore they lack the potential for seamless integration into an already functioning home environment. To bridge the gap between consumer and expert as well as allowing for integration into any existing home environment without physical alteration to the building, a modular home automation solution with seamless integration potential is proposed. The implemented system uses open source software and hardware allowing for development to continue within the existing, large open source community. It can be installed and configured without professional skills or physical alteration of the environment itself and due to its modular design, the system also allows users to add and remove functional components to and from the system providing them with a seamlessly customisable home automation solution. Conceptual design and practical implementations are covered in this document, along with recommendations for both continued research and potential avenues for expansion.

Seamless communication is becoming the main aspect for the next generation of the mobile and wireless networks. Roaming among multiple wireless access networks connected together through one IP core makes the mobility support for the internet is very critical and more important research topics nowadays. Mobile IP is one of the most successful solutions for the mobility support in the IP based networks, but it has poor performance in term of handover delay. Many improvements have been done to reduce the handover delay, which result in two new standards: the Hierarchical MIP (HMIP) and the Fast MIP (FMIP), but the delay still does not match the seamless handover requirements. Finally Seamless MIP (S-MIP) has been suggested by many work groups, which combine between an intelligent handover algorithm and a movement tracking scheme. In This thesis, we show the handover delay reduction approaches, specifically the Seamless Mobile IP. The thesis studies the effects of the S-MIP in the handover delay and the network performance as well. A simulation study takes place to compare between the standard MIP and the new suggested S-MIP protocol in term of handover delay, packet loss and bandwidth requirement. The thesis concludes with the analyzing of the simulation results, evaluating the S-MIP performance and finally gives some suggestions for the future work. / 0046704623257

Nowadays mobility is a field of great importance. The fact of travelling or moving should not mean the rupture of the connection to the Internet. And the current objective is not only to be world-wide connected, it is also to be it always through the best available connection (ABC). It means the need to perform vertical handover to switch between different networks, while maintaining the same Internet connection. All this has to be done in a transparent way to the user. In order provide the highest Quality of Experience some tools are needed to enable checking the status and performance of the different available networks, measuring and collecting statistics, in order to take advantage of each one of them. This thesis presents the theoretical base for a measurement module by describing and analysing different metrics, with special emphasis on delay jitter, collecting and comparing different methods, and discussing their main characteristics and suitability for this goal.