Fours sets of PM10 samples were collected in three sites in SEQ from December 2002 to August 2004. Three of these sets of samples were collected by QLD EPA as a part of their regular air monitoring program at Woolloongabba, Rocklea and Eagle Farm. Half of the samples were used in this study for the analysis of water-soluble ions, which are Na+, K+, Mg2+, Ca2+, NH4 +, Cl-, NO3 -, SO4 2-, F-, Br-, NO2 -, PO4 -3 and the other half was retained by QLD EPA. The fourth set of samples was collected at Rocklea, specifically for this study. A quarter of the samples obtained from this set of samples were used to analyse water-soluble ions; a quarter of the sample was used to analyse Pb, Cu, Al, Fe, Mn and Zn; and the rests were used to analyse US EPA 16 priority PAHs. The water-soluble ions were extracted ultrasonically with water and the major watersoluble anions as well as NH4 + were analysed using IC. Na+, K+, Mg2+, Ca2+ Pb, Cu, Al, Fe, Mn and Zn were analysed using ICP-AES while PAHs were extracted by acetonitrile and analysed using HPLC. Of the analysed water-soluble ions, Cl-, NO3 -, SO4 2-, Na+, K+, Mg2+ and Ca2+ were high in concentration and determined in all the samples. F-, Br-, NO2 -, PO4 -3 and NH4 + ions were lower in concentration and determined only in some samples. Na+ and Cl- were high in all samples indicating the importance of a marine source. Principal Component Analysis (PCA) was used to examine the temporal variations of the water-soluble ions at the three sites. The results indicated that there was no major difference between the three sites. However, comparing the average concentrations of ions and Cl-/Na+ it was concluded that Woolloongabba had more marine influence than the other sites. Al, Fe and Zn were detected in all samples. Al and Fe were high in all samples indicating the significance of a source of crustal matter. Cu, Mn and Pb were in low concentrations and were determined only in some samples. The lower Pb concentrations observed in the study than in previous studies indicate that the phasing-out of leaded petrol had an appreciable impact on Pb levels in SEQ. This study reports for the first time, simultaneous data on the water-soluble, metal ion and PAH levels of PM10 aerosols in Brisbane, and provides information on the most likely sources of these chemical species. Such information can be used alongside those that already exist to formulate PM10 pollution reduction strategies for SEQ in order to protect the community from the adverse effects of PM pollution.

O movimento dos mercados globais rumo à convergência às normas internacionais de contabilidade, com o objetivo de conferir uma linguagem única e uniforme às demonstrações financeiras, tem desafiado o statu quo dos preparadores e usuários da contabilidade. Isso se deve à adoção de normas contábeis orientadas por princípios e não por regras, que primam pela essência sobre a forma e pela análise de riscos e benefícios sobre a propriedade jurídica, exigindo assim, um conhecimento mais profundo e uma melhor interpretação das operações que serão refletidas nas demonstrações financeiras. Dessa forma, o objetivo dessa dissertação é apresentar, com base nos fundamentos das normas internacionais de contabilidade e no arcabouço regulatório inerentes à prestação de serviço público, uma proposta de reconhecimento contábil do contrato de concessão de uma empresa distribuidora de energia elétrica através da aplicação da IFRIC 12 – Service Concession Arrangements. Para tanto, inicialmente foi analisado o surgimento dos contratos de concessão de serviço como instrumento de delegação da prestação de serviço público pelo Estado aos poderes privados e os conceitos jurídicos inerentes a essa relação. Em seguida foi abordado o processo de convergência das normas internacionais no mundo e no Brasil e um estudo detalhado dos princípios relacionadas ao reconhecimento dos contratos de concessão de serviço público. Por fim, foi elaborada uma proposta de reconhecimento contábil do contrato de concessão com base nas demonstrações financeiras para os exercícios findos em 2008 e 2009. Essa proposta evidencia que o modelo é aderente às exigências das normas e que, apesar de complexo em sua operacionalização e relevante à apresentação das demonstrações financeiras, não traz impactos significativos do ponto de vista econômico, e reflete de forma legítima, a verdadeira essência dos contratos de concessão de serviços públicos no Brasil. / The movement of global markets towards convergence to international accounting standards, with the goal of providing a single uniform language to the financial statements, has challenged the status quo of preparers and users of accounting information. This is due to the adoption of accounting standards guided by principles rather than rules that strive for substance over form and for the analysis of risks and benefits over legal ownership, which requires a deeper understanding and better interpretation of the transactions being reflected in the financial statements. Thus, the objective of this dissertation is to present, based on the International Financial Reporting Standards (IFRS) and regulatory framework inherent to the public services industry, a proposal for the accounting recognition of the concession arrangement of a power distribution company through the application of IFRIC 12 - Service Concession Arrangements. To this end, an initial analysis of the introduction of concession service contracts as an instrument of delegation of public service providing by the State to the private sector and the legal concepts inherent in this relationship was performed. Next, the process on the convergence of international standards around the world and in Brazil and a detailed study of the principles related to the recognition of the concession contracts for public services was addressed. Finally, a proposed model was developed for the accounting recognition of a concession arrangement based on the financial statements for the years ended 2008 and 2009. This proposal concludes that the model adheres to the IFRS requirements and that, although operationally complex and relevant for the financial statements presentation, IFRIC 12 does not bring significant impacts from an economic perspective, and reflects true accounting essence of contracts concession for public services in Brazil.

O movimento dos mercados globais rumo à convergência às normas internacionais de contabilidade, com o objetivo de conferir uma linguagem única e uniforme às demonstrações financeiras, tem desafiado o statu quo dos preparadores e usuários da contabilidade. Isso se deve à adoção de normas contábeis orientadas por princípios e não por regras, que primam pela essência sobre a forma e pela análise de riscos e benefícios sobre a propriedade jurídica, exigindo assim, um conhecimento mais profundo e uma melhor interpretação das operações que serão refletidas nas demonstrações financeiras. Dessa forma, o objetivo dessa dissertação é apresentar, com base nos fundamentos das normas internacionais de contabilidade e no arcabouço regulatório inerentes à prestação de serviço público, uma proposta de reconhecimento contábil do contrato de concessão de uma empresa distribuidora de energia elétrica através da aplicação da IFRIC 12 – Service Concession Arrangements. Para tanto, inicialmente foi analisado o surgimento dos contratos de concessão de serviço como instrumento de delegação da prestação de serviço público pelo Estado aos poderes privados e os conceitos jurídicos inerentes a essa relação. Em seguida foi abordado o processo de convergência das normas internacionais no mundo e no Brasil e um estudo detalhado dos princípios relacionadas ao reconhecimento dos contratos de concessão de serviço público. Por fim, foi elaborada uma proposta de reconhecimento contábil do contrato de concessão com base nas demonstrações financeiras para os exercícios findos em 2008 e 2009. Essa proposta evidencia que o modelo é aderente às exigências das normas e que, apesar de complexo em sua operacionalização e relevante à apresentação das demonstrações financeiras, não traz impactos significativos do ponto de vista econômico, e reflete de forma legítima, a verdadeira essência dos contratos de concessão de serviços públicos no Brasil. / The movement of global markets towards convergence to international accounting standards, with the goal of providing a single uniform language to the financial statements, has challenged the status quo of preparers and users of accounting information. This is due to the adoption of accounting standards guided by principles rather than rules that strive for substance over form and for the analysis of risks and benefits over legal ownership, which requires a deeper understanding and better interpretation of the transactions being reflected in the financial statements. Thus, the objective of this dissertation is to present, based on the International Financial Reporting Standards (IFRS) and regulatory framework inherent to the public services industry, a proposal for the accounting recognition of the concession arrangement of a power distribution company through the application of IFRIC 12 - Service Concession Arrangements. To this end, an initial analysis of the introduction of concession service contracts as an instrument of delegation of public service providing by the State to the private sector and the legal concepts inherent in this relationship was performed. Next, the process on the convergence of international standards around the world and in Brazil and a detailed study of the principles related to the recognition of the concession contracts for public services was addressed. Finally, a proposed model was developed for the accounting recognition of a concession arrangement based on the financial statements for the years ended 2008 and 2009. This proposal concludes that the model adheres to the IFRS requirements and that, although operationally complex and relevant for the financial statements presentation, IFRIC 12 does not bring significant impacts from an economic perspective, and reflects true accounting essence of contracts concession for public services in Brazil.

O movimento dos mercados globais rumo à convergência às normas internacionais de contabilidade, com o objetivo de conferir uma linguagem única e uniforme às demonstrações financeiras, tem desafiado o statu quo dos preparadores e usuários da contabilidade. Isso se deve à adoção de normas contábeis orientadas por princípios e não por regras, que primam pela essência sobre a forma e pela análise de riscos e benefícios sobre a propriedade jurídica, exigindo assim, um conhecimento mais profundo e uma melhor interpretação das operações que serão refletidas nas demonstrações financeiras. Dessa forma, o objetivo dessa dissertação é apresentar, com base nos fundamentos das normas internacionais de contabilidade e no arcabouço regulatório inerentes à prestação de serviço público, uma proposta de reconhecimento contábil do contrato de concessão de uma empresa distribuidora de energia elétrica através da aplicação da IFRIC 12 – Service Concession Arrangements. Para tanto, inicialmente foi analisado o surgimento dos contratos de concessão de serviço como instrumento de delegação da prestação de serviço público pelo Estado aos poderes privados e os conceitos jurídicos inerentes a essa relação. Em seguida foi abordado o processo de convergência das normas internacionais no mundo e no Brasil e um estudo detalhado dos princípios relacionadas ao reconhecimento dos contratos de concessão de serviço público. Por fim, foi elaborada uma proposta de reconhecimento contábil do contrato de concessão com base nas demonstrações financeiras para os exercícios findos em 2008 e 2009. Essa proposta evidencia que o modelo é aderente às exigências das normas e que, apesar de complexo em sua operacionalização e relevante à apresentação das demonstrações financeiras, não traz impactos significativos do ponto de vista econômico, e reflete de forma legítima, a verdadeira essência dos contratos de concessão de serviços públicos no Brasil. / The movement of global markets towards convergence to international accounting standards, with the goal of providing a single uniform language to the financial statements, has challenged the status quo of preparers and users of accounting information. This is due to the adoption of accounting standards guided by principles rather than rules that strive for substance over form and for the analysis of risks and benefits over legal ownership, which requires a deeper understanding and better interpretation of the transactions being reflected in the financial statements. Thus, the objective of this dissertation is to present, based on the International Financial Reporting Standards (IFRS) and regulatory framework inherent to the public services industry, a proposal for the accounting recognition of the concession arrangement of a power distribution company through the application of IFRIC 12 - Service Concession Arrangements. To this end, an initial analysis of the introduction of concession service contracts as an instrument of delegation of public service providing by the State to the private sector and the legal concepts inherent in this relationship was performed. Next, the process on the convergence of international standards around the world and in Brazil and a detailed study of the principles related to the recognition of the concession contracts for public services was addressed. Finally, a proposed model was developed for the accounting recognition of a concession arrangement based on the financial statements for the years ended 2008 and 2009. This proposal concludes that the model adheres to the IFRS requirements and that, although operationally complex and relevant for the financial statements presentation, IFRIC 12 does not bring significant impacts from an economic perspective, and reflects true accounting essence of contracts concession for public services in Brazil.

This thesis aims to create an advanced multimedia player with support of an adaptive stream, securing of the multimedia content and support for playing advertisement. The first part explains the used technologies followed by an analysis of available solutions and the comparison between the two. The theoretical framework is then used to create a player library and a testing application. The player library is based on the framework of ExoPlayer application. Whole application is created in Java for the operation system Android OS.

The master's thesis deals with the issue of Wireless Local Area Network (WLAN) from the viewpoint of the security and functional principle of security mechanisms. The transition to the issue concerning the security is accompanied by the methods of wireless data transmission operating on the level of physical layer (FHSS, DSSS, OFDM, MIMO), which is followed by the summary of individual 802.11 standards. The next part deals with the issue of shared transmission medium (CSMA/CA), influence of interference and correcting mechanisms (RTS/CTS). Within the security, the principles of the authentication along with the commonly used methods of security (WEP, WPA, WPA2) are described in detail. The first part concerning security deals with the security in the form of the WEP protocol, which is considered insufficient nowadays and points out the imperfect implementation and the consequent risks. The following part describes the security in the form of WPA which eliminates the implementation weaknesses of the previous WEP security protocol. The description of commonly used mechanisms of authentication (PSK, 802.1x), required temporary key management (PTK, GTK), data integrity (MIC) and encryption which uses TKIP protocol are also included. The last part, possible WLAN security, is aimed at the full support of 802.11i standard, which is called WPA2 (sometimes RSN). That part describes the basic encryption security element CCMP, which is based on the AES block cipher modes. The practical part of the thesis deals with the security verification of current wireless networks. In the process of verification the accessible HW means and programming tools of Open Source Software (OSS) are used. By means of verification it has been pointed out that there are possible security risks resulting from the security method which has been used. Also several recommendations how to reduce the security risks of the used method to minimum are mentioned.

This Master Thesis deals with the side channels, AES encryption algorithm and the use of neural networks to obtain the encryption key. The first part of this work is focused on the basics of cryptography and attacks on cryptographic module. The second part is focused on electromagnetic side channel attack on PIC16F84A microcontroller with embedded AES algorithm. In this section, the Master Thesis tries to analyze electromagnetic emissions of operation S-Box in AES algorithm and try to find sensitive information to use neural network identify encryption key of the AES algorithm. In conclusion is described the software source code to determine the encryption key, summarized results and discussed ways to defend against electromagnetic side channel attack.

The thesis focuses on power analysis of modern cryptographic modules. The first part contains a brief introduction to the topic of the power side channel and basic methods of analyzes. The text describes the process of comparison of modules and a short description of devices found. In the practical part two modules has been selected for the implementation of the encryption algorithm AES-128. The first module was the chip card Gemalto .NET v2 and the second one was the Raspberry Pi. A workplace has been created for these modules which allowed to measure the power consumption of the algorithm AES. Differential Power Analysis has been made using the captured results. In its conclusion the work presents the results in tables and samples of source codes. Graphs were made from the results captured on the Raspberry Pi and from the results of the Differential Power Analysis.

This dissertation work focusses on using information about the location of the user during the authentication process on computer networks. With the growth of mobile computer devices over the last two decades the physical location of users is becoming one of the main issues for access management. This work researches existing solutions which are divided in to two groups related to the source of location information (SATNAV systems for example GPS and based on communication with active infrastructure such as GSM, Wi-Fi). This work shows the methodology for evaluating authentication data which use the principle of fuzzy logic. In comparison with binary logic it is possible to evaluate authentication data accurately. As a result of the authentication process the information is of a higher value, which can be taken into account when setting the levels of user privileges. An important aspect of working with location information is that the user is located in the same place and from where they are asking for access to the system. Solving this question could be linking user biometrics for example finger prints. This principle is used in two types of microelectronic authentication terminals which were developed in conjunction with this work. The first type of terminal uses a SATNAV receiver and an ISM wireless communication module as a source of location information. On the first type of authentication terminal newly developed authentication techniques were tested. The users biometrics are checked by finger print sensor with embedded processing. In the second type authentication terminal a Wi-Fi and GSM module were added for location purposes. In the conclusion of this dissertation the testing methodology of the data authorization and evaluation process of the second type of microelectronic authentication terminal is shown. This confirms the practicality of the suggested methodology and the time-space information in the authentication process.

Šifrování multimediálních datových přenosů v reálném čase je jednou z úloh telekomunikační infrastruktury pro dosažení nezbytné úrovně zabezpečení. Rychlost provedení šifrovacího algoritmu může hrát klíčovou roli ve velikosti zpoždění jednotlivých paketů a proto je tento úkol zajímavým z hlediska optimalizačních metod. Tato práce se zaměřuje na možnosti paralelizace zpracování SRTP pro účely telefonní ústředny s využitím OpenCL frameworku a následnou analýzu potenciálního zlepšení.