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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Authentication and Identification of Sensor Nodes to Avoid Unauthorized Access in Sensor Networks / Autentisering och identifiering av sensornoder för att undvika obehörig åtkomst i sensornätverk

Henriksson, Michael January 2020 (has links)
With the increasing popularity of Internet of Things (IoT), network connected devices and sensors, to easier collect data is security an aspect that must not be forgotten. When sensitive data, such as personal or private data, is sent over the network without protection can it easier be obtained by anyone who want to get their hands on it. This risk increases with the value of the data sent and an increase in security should therefore follow this value. Based on this is it therefore important to look at the security aspects of a sensor network to find ways to easy integrate security such as authentication. This to make sure that the only devices and users accessing or sending data on the network is authorized and not malicious devices. This thesis focuses on the authentication and identification of the devices joining the network to make sure that only trusted devices would be able to join. The protocol in focus is ZigBee but the proposed solution can be integrated with any protocol and utilizes a Key Distribution Center (KDC) together with an authentication method based on the Challenge Handshake Authentication Protocol (CHAP) to authenticate new devices before they are allowed into the network. This solution is secure and relatively simple which makes it easy to integrate with any sensor network. / Med en ökad popularitet av att koppla upp sensorer och apparater mot ett nät- verk för att enklare kunna samla in data är säkerhet en aspekt som inte får glömmas bort. När känslig data, så som personlig eller privat data, skickas över nätverket oskyddat kan någon som vill komma åt datan lättare få tag på den. Denna risk ökar med värdet av datan som skickas och en ökningen av säkerhet bör darav följa ökning av värdet på datan. Utav denna anledning är det viktigt att se över säkerheten i sensornätverk och finna lösningar som lätt kan integreras med ett sensornätverk. Detta för att säkerhetsställa att endast de snesornoder som har auktoritet kan gå med i, samt skicka data på nätverket och därmed undvika oönskad åtkomst. Denna avhandling fukuserar på autentisering och identifiering av de noder som ska anslutas till nätverket för att säkerhetsställa att endast pålitliga och auktoriserade noder blir insläppta. Det protokoll som är i fokus i denna avhandling är ZigBee men den föreslagna lösningen kan även integreras med andra protokoll. Den föreslagna lösning- en använder sig även av ett Key Distribution Center (KDC) samt en autentiseringsmetod som baseras på Challenge Handshake Authentication Protocol (CHAP) för att authentisera nya noder innan de blir insläppta i nätverket. Denna lösning är säker och relativt enkel vilket gör det enkelt att integrera med all typer av sensornätverk.
2

POLICY PROPOSAL ON THE FINANCE AND GROWTH RELATIONSHIP: UNDERSTANDING THE SWITCH FROM "VIRTUOUS" TO "BAD" CYCLES

LAURETTA, ELIANA 22 May 2014 (has links)
Studi condotti sulla crisi finanziaria del 2007-09 e la recessione economica hanno evidenziato l’inadeguatezza delle teorie predominanti e la loro inefficacia nel proporre adeguate soluzioni di policy. La presenza di moneta bancaria nell’economia e di un sistema finanziario caratterizzato da innovazione finanziaria e speculazione modificano profondamente la natura stessa del processo di credit creation. Una nuova prospettiva sulla relazione tra finanza e crescita economica necessita essere sviluppata cercando di colmare le lacune esistenti tra New Growth Theory e Evolutionary Theory, come J.A. Schumpeter (1934) e altri studiosi hanno evidenziato. I fattori strutturali sono alla base della persistente instabilita` finanziaria nell’economia. Questo studio tenta di spiegare l’ipotesi che sta alla base dell’intera analisi circa il passaggio avutosi nell'impianto strutturale dell'economia da un virtuous cycle ad un bad cycle, e dimostrare l’esistenza di cio` che definiamo wealth trap, la quale e` ipotizzata essere conseguenza di un sistema finanziario tecnologicamente avanzato, ma non socialmente avanzato. Un modello non lineare ad Agenti (AMB) chiamato BFSE (Based-line Financial System Economy) mostra , tramite la sperimentazione sul modello ICEACE(Erlingsson et al., 2011), evidenze sulla centralita` del sistema finanziario e dell’esistenza del bad cycle. Una discussione sulle macroprudential policies e le politiche strutturali e` introdotta. / Studies of the 2007-09 credit crisis and the resulting recession have revealed the inadequacy of the predominant theoretical frameworks and their failure to propose adequate policy solutions. The presence in the economy of bank money and a financial system characterized by financial innovation and speculation changes the nature of credit creation. As J.A. Schumpeter (1934) and others scholars have recognized, a new perspective on the financial-growth relationship needs to be developed by filling the gaps in New Growth Theory and Evolutionary Theory - two Sons of Schumpeter - and in some way combining them. Structural factors are at the bottom of the persistence of the financial instability in the economy. The goal of this research is to explain the main hypothesis of the historical passage of the economy from a virtuous to a bad cycle and to show the existence of the wealth trap, which is a consequence of a high-technologically advanced financial system within the economic system. A non-linear ABM (Agent Based Model) called BFSE provides, through experimentation using ICEACE model (Erlingsson et al., 2011), interesting evidences of the centrality of the financial system and the bad cycle. Macroprudential and structural policies are introduced.
3

Psychoterapeut se vzděláním sociálního pracovníka: Ovlivnění role psychoterapeuta preedukačním vzděláním v sociální práci při komparaci s jednooborovou psychologií a jejich kompetencí dle české asociace pro psychoterapii / Psychotherapy educated social worker: Influence profession psychoterapist, pre-educational education in social work in comparison with in psychology and their competence in accordance with Czech Association for Psychotherapy

FULIER, Petr January 2017 (has links)
The thesis deals with the question whether social work is a good educational base for further specialization in psychotherapy. This question seeks to answer using the argument of current world trends, historical context and monitoring competence of the European psychotherapist. To help these areas compared with the current psychology and wonders what is the difference between these fields and how these differences manifest themselves in psychotherapy.
4

As formas da inspiração = linguagem e criação poética em "Inspiração nordestina" de Patativa do Assaré / Forms of inspiration : language and poetic creation in "Inspiração nordestina" de Patativa do Assaré

Silva Romero, Jorge Henrique da, 1980- 02 August 2011 (has links)
Orientador: Suzi Frankl Sperber / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem / Made available in DSpace on 2018-08-17T15:46:23Z (GMT). No. of bitstreams: 1 SilvaRomero_JorgeHenriqueda_M.pdf: 957479 bytes, checksum: baefb9b935cfaa6757e00bfe169cd9c3 (MD5) Previous issue date: 2011 / Resumo: Este trabalho procura investigar a linguagem e a criação poética em Inspiração Nordestina. Publicado em 1956, esse livro representa um momento importante na trajetória poética de Patativa do Assaré. A questão que permeia toda a dissertação é como o poeta transita entre as formas de uma tradição popular, com um repertório composto por cordéis, desafios e pelejas, e uma tradição poética composta por formas pouco utilizadas pelos "poetas populares", como décimas, sonetos, oitavas. É utilizando essa diversidade de recursos poéticos e a possibilidade de se expressar em duas "línguas" ("matuta" e outra de acordo com a norma padrão) que o poeta redimensiona panorama da poesia brasileira dos séculos XX e XXI / Abstract: This study investigates the language and poetic creation in Inspiração Nordestina. Published in 1956, this book represents an important moment in the history of poetic Patativa do Assaré. The question that permeates the entire thesis is how the poet moves between forms of a popular tradition, with a repertoire consisting of "cordéis", "desafios" and "pelejas", and a tradition of poems composed by some forms used by the "folk poets" as decimals, sonnets , octaves. It is using this diversity of poetic devices and the possibility to express themselves in two "languages"("Matuta"and standard) that the poet resize the panorama of Brazilian poetry of XX and XXI century / Mestrado / Teoria e Critica Literaria / Mestre em Teoria e História Literária
5

Entre o narrador e o almanaqueiro : o lugar da experiência tradicional na produção do artista popular José Costa Leite / Between the narrator and the "almanaqueiro : the role of the traditional experience in the production of the popular artist José Costa Leite

Lima, Camila Teixeira, 1988- 26 August 2018 (has links)
Orientador: Silvio César Camargo / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas / Made available in DSpace on 2018-08-26T07:07:27Z (GMT). No. of bitstreams: 1 Lima_CamilaTeixeira_M.pdf: 6770171 bytes, checksum: 94c456c1b121180785ca943dcc093355 (MD5) Previous issue date: 2014 / Resumo: Nesta pesquisa estive preocupada em refletir sobre uma questão de grande interesse para os estudos sociológicos da cultura: a investigação de uma manifestação da cultura popular. Busquei entender qual o lugar reservado para a experiência tradicional nesta cultura, mais especificamente, nos almanaques, cordéis e xilogravuras produzidas por José Costa Leite (JCL). A problemática formulada pelo teórico crítico Walter Benjamin para pensar as transformações da experiência (Erfahrung) e consolidação de uma forma privada de relação com mundo, que o autor chamou de vivência (Erlebnis), me pareceu um caminho interessante para analisar a produção popular de Costa Leite. Como materialista histórico, Benjamin analisa os fenômenos articulados ao contexto histórico em que eles se configuram. A metodologia empregada nesta pesquisa foi análoga à empregada pelo interlocutor teórico em questão, para que a investigação sobre a presença ou ausência da experiência tradicional na produção de Costa Leite possa ser entendida como desaparecimento ou não da experiência no mundo moderno e não como expressão de um outro fenômeno qualquer. A metodologia empregada nesta pesquisa, portanto, é o materialismo histórico. Como a minha hipótese inicial era a de que a produção de Costa Leite ainda era capaz de comunicar experiência foi necessário fazer o mesmo caminho que Benjamin realizou para elaborar o seu diagnóstico, ou seja, foi necessário pensar em que medida o contexto de produção de Costa Leite difere daquele em que Benjamin afirmou a morte da Erfahrung para que a produção de JCL possa não só ser considerada como uma forma de transmissão de saberes que também caminha na contramão do conhecimento especializado (e massificado), mas que se configure como uma possibilidade de comunicar Erfahrung / Abstract: In this research I've been dedicated on thinking about a question of great interest to the sociological studies on culture: the investigation of popular culture manifestation. I have intended to understand the locus reserved to the traditional experience in this culture, specifically in almanaques, cordéis e xilogravuras produced by José Costa Leite (JCL). The problematics formulated by critical theorist Walter Benjamin to think about the transformations of experience (Erfahrung) and the consolidation of a private form of relationship with the world, which the author called experience (Erlebnis), seemed to me a interesting path to analyse the popular production of Costa Leite. As a historical matherialist, Benajmin analyses the phenomena articulated to the historical context in which they configurate themselves. The methodology followed on this research was similar to the one folowwed by the theorectical interlocutor, Walter Benjamin, so that the investigation about the presence (or absence) of the traditional experience in the production of Costa Leite could be understood as disappearance (or not) of the experience in modern world, not as the expression of another phenomena. Therefore, the methodology followed in this research is the historical matherialism. As the initial hypothesis was that the production of Costa Leite was capable of communicate experience, it was necessary to follow the same path that Benjamin made to elaborate his diagnosis, in other words, this research had to think about at what extent the context of production of Costa Leite differs from that from which Benjamin postulated the death of Erfahrung, so that the production of Costa Leite could be viewed as a form of transmission of knowledge that also go in against hand of specialized and massified knowledge and translate as a possibility of communicate Erfahrung / Mestrado / Sociologia / Mestra em Sociologia

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