Cascading Web Services represent a collection of services offered in a system consisting of multiple devices and multiple interacting platform independent networks. ‘Cascading’ enables Web Services to exploit access in diverse environments without manual intervention. The aim of this thesis is to investigate how Mobile Web Services interact with multiple other Web Services by allowing the generated content to cascade. These services are demonstrated as a technical design solution, in a number of cases within the field of Learning technologies. Communication among devices is preceded using request-response commands by cascading these commands between different Web Services that are self-contained and independent on their context or state. The system signifies a typical Service Oriented Architecture (SOA) based on a distributed system. Cascading Web Services involve multiple transport networks including Bluetooth Technology, GPRS, Wi-Fi, and Wired Networks. Whereas the protocol of this communication is to bridge Wired and Wireless networks for data transactions, specifically from a Bluetooth location-based network. A number of particular cases will be illustrated in the context of ‘educational outdoor activities’, to demonstrate how the system solution works involving users.

O Sistema de Posicionamento Global (GPS) permite uma grande variedade de aplicações civis e militares. Dentre as várias aplicações, uma de especial interesse é a navegação, que tem crescido muito nos últimos anos devido a fatores como menor custo, e fácil utilização desta tecnologia. Num sistema de navegação terrestre, assim como na navegação marítima, fluvial e aérea, um mapa digitalizado, ou imagem de satélite disponível da região de interesse é exibida na tela do computador de bordo e a posição do veículo é apresentada em "tempo real" a partir da posição fornecida por receptores GPS. Além disso, a comunicação disponível nos dias de hoje permite uma maior integração entre o veículo e o escritório. Finalmente, o Google Earth permite que se tenha acesso a uma grande quantidade de informações necessárias ao desenvolvimento de inúmeros trabalhos, permitindo inclusive a inserção de fotos e imagens para registro dos acontecimentos. O potencial deste tipo de sistema só foi possível a partir de maio de 2000, com a eliminação da SA (Selective Availability).Com isso, o posicionamento absoluto realizado por receptores de navegação (menos precisos do que os receptores geodésicos) foi aprimorado, podendo conseguir precisões da ordem de 10m, o que aumenta a qualidade de aplicações como a navegação terrestre. A proposta desta dissertação é descrever o desenvolvimento de um protótipo veicular para aplicações de campo em Geociências, onde foi incluída a navegação em tempo real, o uso da internet para a comunicação pessoal e interface de acesso ao Google Earth. O protótipo desenvolvido permite a extensão de parte da infra-estrutura de um laboratório para apoio das atividades de campo. / In our days the Global Positioning Systems (GPS) is a technology with a great variety of military and civilian applicability. Among this uses, navigation is one activity that is largely increasing in reason to lowering equipment prices and introduced facilities as easy to use technology. In practice, a system structured to navigate in terrestrial, maritime, fluvial or aerial way is formed by a GPS connected to an onboard computer and video equipped with appropriate software that process in a instantaneous mode (real time) all the information necessary to show on screen the geographical position of the vehicle. In parallel, new advances in network communication open the possibility to integrate completely the vehicle in movement with the staff in the office. Also, the Geoogle Earth™ and World Wide Web increase the facilities to view online the terrain and open the possibility to user interact directly with routines that insert local photo and images. Navigate with accuracy using a single-receiver GPS linked to a computer was only possibly after May of 2000, when the SA (Selective Availability) was excluded from GPS signal. Consequently, absolute positioning with one band handled GPS (low accuracy when compared to geodetic two bands GPS) was tested and the results show the availability to locate points in the Earth surface with an uncertainty degree not above than 10 meters (in terms of planimmetric coordinates). This performance increases the data quality and the ability of single-receiver GPS to be used to navigation purposes. In this work, it is assembled and tested a navigation system prototype installed in a vehicle with the objective to optimize field survey and adapted to some geosciences necessities, including the possibility to navigate in real time integrated with Internet facilities to personal communication and with an interface to access the Google Earth™. The configuration of the navigation system prototype elaborated in this project permit to extend to the field some facilities only accessible in a laboratory environment and consequently the results obtained with the system increased the performance of all the field work stages.

Made available in DSpace on 2014-06-12T16:01:28Z (GMT). No. of bitstreams: 2 arquivo9413_1.pdf: 1325696 bytes, checksum: e7de71518a27dfd5c073cfbd0f623230 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2012 / As redes sem o padr~ao IEEE 802.11 est~ao presentes nos mais diversos ambientes e continuam a expandir-se devido, principalmente, ao inegavel aumento da produtividade para as empresas. Ao mesmo tempo que se expandem, essas redes levam consigo suas vulnerabilidades. As redes sem fio contam com mecanismos para protec~ao de quadros de dados e tambem para protec~ao dos quadros de gerenciamento, apenas os quadros de controle n~ao contam com uma protec~ao padronizada pelo IEEE. A aus^encia de protec~ao possibilita atividades maliciosas que se utilizam de tecnicas de manipulac~ao, falsificac~ao e reinjec~ao de quadros de controle que geram negac~ao de servico na rede. Esta dissertac~ao prop~oe um mecanismo de protec~ao dos quadros de controle do IEEE 802.11, que faz uso de um numero de sequ^encia e de um codigo de autenticac~ao de mensagem a fim de evitar que estac~oes maliciosas, n~ao pertencentes a rede, tenha sucesso ao manipular, falsicar ou reinjetar quadros de controle que levariam a indisponibilidade da rede. O mecanismo proposto destaca-se por proteger todos os quadros de controle indistintamente, possuir um maior grau de seguranca e introduz, nesses quadros, um aumento de tamanho signi- ficativamente menor em comparac~ao aos trabalhos relacionados que tambem se prop~oe a proteger todos os quadros de controle

Submitted by marco aurélio santos (marrco.santos@gmail.com) on 2018-07-30T01:42:52Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) msc_dissertacao_marcoSantos.pdf: 6142716 bytes, checksum: 17219663e0f7676d5c438178de493d89 (MD5) / Approved for entry into archive by Secretaria PPGI (secretariappgi@icomp.ufam.edu.br) on 2018-07-30T18:34:28Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) msc_dissertacao_marcoSantos.pdf: 6142716 bytes, checksum: 17219663e0f7676d5c438178de493d89 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2018-07-31T18:29:17Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) msc_dissertacao_marcoSantos.pdf: 6142716 bytes, checksum: 17219663e0f7676d5c438178de493d89 (MD5) / Made available in DSpace on 2018-07-31T18:29:17Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) msc_dissertacao_marcoSantos.pdf: 6142716 bytes, checksum: 17219663e0f7676d5c438178de493d89 (MD5) Previous issue date: 2018-04-16 / Internal positioning systems allow the localization of people or certain objects indoors, as well as assist in navigation and orientation. Proposals for indoor location systems based on only one technology have achieved unsatisfactory performance in localization, mainly due to the limitations in relation to the conflicting characteristics present in these environments. This work aims at the development of a hybrid location system, integrating the PDR and Wi-Fi technologies, which aims to provide the location of a user in an internal environment, allowing the user to move around and visualize their current location through a representation on a map. The results were satisfactory, including the direct influence of factors such as: physical characteristics (height, body mass, size of the past), smartphone location, speed of the adopted march and adoption of constant movements. / Os sistemas de posicionamento internos permitem a localização de pessoas ou certos objetos em ambientes internos, assim como ajudam na navegação e orientação. As propostas de sistemas de localização para ambientes internos baseados em somente uma tecnologia tem alcançado desempenho insatisfatório na localização, principalmente, devido às limitações em relação às características conflitantes presentes nesses ambientes. Este trabalho tem como objetivo o desenvolvimento de um sistema híbrido de localização, integrando as tecnologias PDR e Wi-Fi, que visa fornecer a localização de um usuário em um ambiente interno, permitindo ao usuário locomover-se e visualizar a sua localização corrente através de uma representação em um mapa. Os resultados obtidos foram satisfatórios, constando-se a direta influência de fatores como: características físicas (altura, massa corporal, tamanho da passada) do usuário, localização do smartphone, velocidade da marcha adotada e adoção de movimentos constantes.

The goal of the Internet of Things’ sensing technology is to provide LBS(location-based services); a key technology is finding out how to positioning the sensing devices. For positioning outdoors, mature tech-nology such as GPS and cellular network location can be used. There is little research about indoor positioning, and there is no finished product on the market. This paper shows how to use both Wi-Fi and ZigBee signal for position-ing; Wi-Fi to find the area position and ZigBee to find the coordinate position. The main contribution of this paper is described in the follow-ing: This paper will present an algorithm using kNN on a Wi-Fi signal, as a way to find the location area of users. The GPS signal cannot be used indoors, but there are usually numerous Wi-Fi signals, that can be used for indoor positioning. In this design, to build a dataset containing the number of locations and the Wi-Fi signal strength list of each location. When indoor positioning is needed, the KNN algorithm is used to compare the user’s Wi-Fi signal strength with the dataset and find the location number. When precise positioning is needed, the ZigBee signal should be used. In this paper two different methods for precise positioning in are used, one is an improved algorithm of triangle centroid algorithm where the positioning accuracy depends on the number of anchor points and the interval of each point. The other method is the neural network method. This method could give stable result with only four anchor points. Finally, there is a comparison of the methods mentioned in this paper : the Wi-Fi fingerprint method, the ZigBee triangle centroid algorithm, and neural network method.

Ända sedan radion uppfanns har trådlös kommunikation varit ett mål för modern teknologi. Trots över 100 års teknologisk utveckling är radiosignaler högst relevanta, och används idag både för traditionell enkelriktad radiosändning, men också som grund för Bluetoothteknologin, som stöds av allt från bilar till telefoner och högtalare. Den här avhandlingen beskriver framtagandet av en speciell typ av Bluetoothsändare, så kallad beacon, som dessutom tillämpar trådlös nätverksanslutning för att utvidga beacons klassiska funktionalitet och ge nya möjligheter. Den nya produkten kallas Beacone. Som stöd för dess funktionalitet utvecklas ett webbgränssnitt och en mobilapplikation. Resultatet utvärderas och möjliga förbättringar diskuteras. Arbetet visar att det under flera omständigheter finns fördelar med en nätverksansluten beacon, som tillhandahåller möjligheter som inte annars hade funnits. / Ever since the invention of the radio, wireless communication has been the goal for modern technology. Despite 100 years of technological development, radio waves remain highly relevant, and are today used both in traditional one-way radio transmission, but also as the foundation for Bluetooth technology, which is supported by cars, phones, speakers, and everything in between. This report describes the development of a special Bluetooth transmitter, a so-called beacon, which also features wireless network connection to expand the traditional functionality of beacons and yield new opportunities. The new product is named Beacone. Supportive software, such as a web interface and a mobile cellphone application, is also developed. The result is evaluated, and possible improvements are discussed. The work shows that there are circumstances where Wi-Fi connectivity provides benefits which would not be available without it.

In Bradbury’s dystopian novel Fahrenheit 451, knowledge is illegal, and popular culture is promoted as a way to control society. Guy Montag, the central character of the book, undergoes through a journey of liberation from the oppressive system to the further achievement of the forbidden knowledge. The female characters in the book are key to his awakening and evolvement. Unfortunately during the course of the story these women perish. Using the theories of Simone De Beauvoir and Janice Radway, this essay explores the concept of “otherness” and the consumption of popular culture in a patriarchal and oppressive society. This paper also argues that the construction of the masculinity of the protagonist would not be possible without the women, and their death is a violent reaffirmation of a patriarchal order.

To light up the world of technology, where wireless communication has bloomed to a great extend which requires a lot of data to be transmitted and received every fraction of the second a new era is coming. Electro-magnetic waves i.e., radio waves are the main way to transmit wireless data but certain limitations are there because radio waves can only support less bandwidth because of compact spectrum availability and intrusions. Visible Light Communication (VLC) has come to take way those issues. The new technology Li-Fi which stands for Light-Fidelity is a new kind of wireless communication system which uses light waves as a medium instead of radio frequency electromagnetic waves. This pro-ject presents an eco-friendly data communication system through visible light which consists of LEDs that transmit audio signals and sensor data to the receiver. A connection protection mechanism that co-operates with wireless network and visible light communication to achieve relia-bility and performance overcoming the drawbacks from the pre-existing system is proposed here.

Our research is an exploratory study on how various parameters in the attack, ranging from that of the worm (replication rate), to those of the network (number of nodes, % fire-walled computers) as well as user behaviour (frequency of checking mail) impact the spread of malware. Through the development of a simulator we have created various experiments and have studied the impact of all possible parameters

In the field of Human Computer Interaction (HCI), low fidelity prototypes are a well-established method with solidly defined advantages and disadvantages. Further development of different methods within this field is constantly evolving, and this paper describes the concept of one of these methods, low fidelity video prototypes. It gives a brief introduction to low fidelity video prototyping methods, advantages and disadvantages. The video prototype is compared to paper prototyping, which lies closest to it in the low-fi family. I explain my methods for developing a paper prototype, a video prototype based on this prototype, the testing of both prototypes, and the results of these tests. Video prototyping is more effective than paper prototyping in certain aspects because the tests themselves demand less people, and less time to walk through the test. It is easy to go through the task in the users own pace. It is a useful method on its own, and can also be effective as a complement to other low-fi prototypes. They are easier to test on larger groups and to share over distance. It is easy to produce, edit and refine video prototypes with modern animating tools.