Submitted by Kamila Costa (kamilavasconceloscosta@gmail.com) on 2015-07-23T19:11:45Z No. of bitstreams: 2 Dissertação - Luis A P Batista.pdf: 26709847 bytes, checksum: 825021f874056d390e50bc5fa98b137a (MD5) Capa.pdf: 223609 bytes, checksum: 8831f2d4b1dd1604ea6ed1e33e2a0bf6 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-27T15:09:52Z (GMT) No. of bitstreams: 2 Dissertação - Luis A P Batista.pdf: 26709847 bytes, checksum: 825021f874056d390e50bc5fa98b137a (MD5) Capa.pdf: 223609 bytes, checksum: 8831f2d4b1dd1604ea6ed1e33e2a0bf6 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-27T15:17:55Z (GMT) No. of bitstreams: 2 Dissertação - Luis A P Batista.pdf: 26709847 bytes, checksum: 825021f874056d390e50bc5fa98b137a (MD5) Capa.pdf: 223609 bytes, checksum: 8831f2d4b1dd1604ea6ed1e33e2a0bf6 (MD5) / Made available in DSpace on 2015-07-27T15:17:55Z (GMT). No. of bitstreams: 2 Dissertação - Luis A P Batista.pdf: 26709847 bytes, checksum: 825021f874056d390e50bc5fa98b137a (MD5) Capa.pdf: 223609 bytes, checksum: 8831f2d4b1dd1604ea6ed1e33e2a0bf6 (MD5) Previous issue date: 2010-06-01 / Não Informada / This thesis is intended to look into the FTP (File Transfer Protocol) system on the News Broadcasting production from stations belonging to Rede Amazônica (TV Amazonas, TV Rondônia, TV Acre, TV Roraima and TV Amapá), at the Central de Jornalismo (journalism Center) located in the capital of the State of Amazonas and its effects on the routine of the community from the municipality of Manacapuru, which has become not only consumer of information, but also its protector. As a theoretical reference underlying Castells’ (1999, 2001, 2003) approaches, with the theory of network society through access to information; Dizard (2000) with the theory of old and new medias, analyzed on a time-space scale, in the context of the Amazon Region; and Milanesi (1978) with a reflection regarding the impact influence of old and new medias on peripheral areas, in regards to the existence of a central area. The research, an exploratory-descriptive case study, comprises communication as a result of a historical process which, in order to meet the society’s constantly changing demands, produces at the same time, through science, new technologies. The applied investigative techniques consist of document research with quantitative and qualitative data collection survey, by using resources such as questionnaires, semistructured interviews, semi-structured and participative observation. Unpublished and standardized data collected in this study aimed at contributing to the successful scientific knowledge production regarding the Amazon reality, as there is an expectation the results may be used as reference to other areas and investigations. / Esta dissertação investiga o efeito do sistema FTP (File Transfer Protocol ou Protocolo de Transferência de Arquivo) no processo de produção do telejornalismo das emissoras da Rede Amazônica (TV Amazonas, TV Rondônia, TV Acre, TV Roraima e TV Amapá), a partir da Central de Jornalismo sediada na capital do estado no Amazonas e seus efeitos no cotidiano da comunidade do município de Manacapuru, que passou a ser não apenas consumidora de informação, mas também produtora dela. Como referencial teórico embasa a reflexão nas abordagens de Castells (1999, 2001, 2003) com a teoria da sociedade em rede por meio do acesso à informação; Dizard (2000) com a teoria das velhas e novas mídias, analisadas, em uma escala tempo-espaço, ao contexto da região amazônica; e Milanesi (1978) com a reflexão acerca da influência do impacto das velhas e novas mídias em áreas periféricas, em relação à existência de uma área central. A pesquisa, um estudo de caso de caráter exploratório-descritivo, compreende a comunicação como resultado de um processo histórico que para atender as demandas da sociedade em constante transformação, produz em paralelo, por meio da ciência, novas tecnologias. As técnicas de investigação empregadas consistem em pesquisa documental com levantamento de dados quantitativos e qualitativos, pautadas no recurso de questionários, entrevistas semi-estruturadas, observação semi-estruturada e participante. Os dados inéditos levantados e sistematizados neste estudo tiveram por objetivo contribuir com o processo de produção do conhecimento científico acerca da realidade amazônica, na expectativa dos resultados virem a servir como referência para outras áreas e investigações.

A measuring system Striton has been developed at the department of biomedicalengineering, University Hospital of Umeå, for motion analysis using motion sensors whichattaches to the patient’s lower body to assess the risk for potential neurological andmusculoskeletal damage. The measuring system is comprised of two motion sensor unitsand a remote control where data is gathered based on step height, step width, theorientation of the calves and step frequency. The motion sensor units which attach to thecalves are comprised of a MCU with a built in Wi-Fi module, a IMU and and time-of-flightsensors. Data is transferred through Wi-Fi and stored on a SD-card as CSV-files on theremote control which is comprised of a Raspberry Pi Zero WH running a Linux operatingsystem (Raspbian). The remote control also has the functions to initiate and complete ameasurement as well as mark an event. The extraction of data from the remote control toanother unit for analysis occurs through SSH and SFTP using third-party programs whichmay require technical knowledge. A unique software was designed specifically for Stritonfor the operating system Windows 10 using Visual Studio (2019) which provides thefunctions to connect to a predefined Wi-Fi access point as well as automatically reconnectto previously connected access point at shutdown, connect through SFTP, list the savedfiles on the remote control, perform file operations, synchronize the date and time on theremote control as well as change settings in the software which is saved locally in a settingsfile. The user interface is minimalistic with the intention to reduce complexity and timerequirement to extract the data from the measuring system Striton. / Ett mätsystem Striton har utvecklats av CMTS, Medicinsk Teknik – FoU på NorrlandsUniversitetssjukhus för rörelseanalys med hjälp av rörelsesensorer som fästs på patientensunderben för att bedöma en potentiell neurologisk samt muskuloskeletal skada.Mätsystemet består av två sensorenheter samt en fjärrkontroll där data samlas in baseratpå höjd av steg, stegbredd, underbenens orientering samt stegfrekvens. Sensorenheternasom fästs på underbenen består av en MCU med inbyggd Wi-Fi modul, IMU och time-offlight sensorer. Data förs över via Wi-Fi och lagras på ett SD-kort i form av CSV-filer påfjärrkontrollen beståendes av en Raspberry Pi Zero WH som driver ett Linuxoperativsystem (Raspbian). Fjärrkontrollen har även funktionerna att kunna starta ochstoppa en mätning samt markera en händelse. Extrahering av data från fjärrkontrollen tillen annan enhet för analys sker via SSH och SFTP med hjälp av tredjepartsprogram som kankräva teknisk kunskap. En unik programvara designades specifikt för Striton tilloperativsystemet Windows 10 i miljön Visual Studio (2019) och tillhandahålleregenskaperna att kunna ansluta till en bestämd Wi-Fi åtkomstpunkt samt automatisktåteransluta till föregående åtkomstpunkt vid avslut, ansluta via SFTP, visa sparade filer frånfjärrkontrollen, utföra filoperationer, synkronisera datum och tid på fjärrkontrollen samtändra inställningar i programvaran som sparas i en lokal inställningsfil. Gränssnittet ärminimalistiskt med syfte att reducera komplexiteten samt tidsåtgången för extrahering avdata från mätsystemet Striton.

The main task of this master’s thesis is to simulate the routing protocol AODV (Adhoc On-Demand Distance Vector Routing) to the Network Simulator ns-3 environment, and to realize a model of MANET (Mobile Ad-hoc Network) network with the support of Quality Of Service (QoS). Further implement the protocol AODV in real devices and the involvement of such nodes in the simulation process using the simulator ns-3. This work provides the theoretical basics: it deals with the primary characteristics of MANET, describes in detail the routing protocols MANET with support of QoS, provides information about the Network Simulator ns-3 simulation environment, describes in detail the existing implementation solutions of the protocol AODV in to real devices and provides information about the methods of involvement real devices to the simulation.

The diploma thesis ’Virtualization of Operating Systems’ deals with a general description of virtualization technology and briefly discusses its use cases and advantages. The thesis also mentions examples of different types of virtualization technologies and tools, including more thorough description of the two technologies used for measurement: Docker and KVM. The second part of this thesis descibes the preparation, installation and configuration of all the tools and services that are necessary for measurement of the influence of the aforementioned virtualization technologies on network services running on the virtual machines, including analysis and discussion of the resulting data. Moreover, a custom application for fully automated measurement of the parameters of network services was created, and is also described in this thesis. The conclusion of this thesis summarizes and discusses the achieved results and acknowledges the influence of virtualization on network services, where the Docker application containers, which are with their low overhead comparable to a "bare" system without any virtualization, managed to achieve much better performance results than the traditional virtual machines on KVM.

Generic Ericsson Processor boards are general purpose hardware platforms which provide generic processing services. They support the Unified Extensible Firmware Interface Specification. They have several network interfaces available and they are connected to Ericsson’s laboratory network. Several servers are also connected to this network. These boards require periodic firmware upgrades. They also require acquiring new firmware components and data files. Currently, an application to download or upload files from and to Ericsson’s laboratory servers when an Operating System has not already been booted does not exist. Therefore, the files have to be transferred to USB drives which are connected later to the boards in order to transfer the files. This is a time consuming operation which decreases Ericsson’s productivity. In addition, although Generic Ericsson Processor boards have an optional solid-state drive as secondary storage, Ericsson wants to be able to operate without it. This is because this secondary storage is not always available and Ericsson does not want to use it when the Generic Ericsson Processor boards are operating before an Operating System has been loaded. They prefer to use Random Access Memory storage. This project is focused on studying possible solutions for those two problems. Several file transfer protocols are analyzed. Several file system solutions mounted on Random Access Memory are also explored. A Trivial File Transfer Protocol client application and a Random Access Memory Disk driver prototype are designed, implemented and tested. They are tailored to work on a pre-boot environment, when the boards have not booted an Operating System yet, in Ericsson’s laboratory network. Finally, a secure file transfer protocols’ study is developed. This study will be used to assess Ericsson on the optimal secure file transfer protocol choice in order to implement possible secure future versions of the system.

A core construct in the lifespan theory of socioemotional selectivity, future time perspective (FTP) refers to individuals’ perceptions of their remaining time in life. Its adaptation to the work context, occupational future time perspective (OFTP), entails workers’ perceptions of remaining time and opportunities in their careers. Over the past decade, several quantitative studies have investigated antecedents and consequences of general FTP and OFTP in the work context (i.e., FTP at work). We systematically review and critically discuss this literature on general FTP (k = 17 studies) and OFTP (k = 16 studies) and highlight implications for future research and practice. Results of our systematic review show that, in addition to its strong negative relationship with age, FTP at work is also associated with other individual (e.g., personality traits) and contextual variables (e.g., job characteristics). Moreover, FTP at work has been shown to mediate and moderate relationships of individual and contextual antecedents with occupational well-being, as well as motivational and behavioral outcomes. As a whole, findings suggest that FTP at work is an important variable in the field of work and aging, and that future research should improve the ways in which FTP at work is measured and results on FTP at work are reported.

Dentro del campo de las finanzas, el estudio del nivel de aversión al riesgo que presentan los agentes económicos resulta interesante desde diferentes puntos de vista. En primer lugar, se encuentra relacionado con el conocimiento sobre las expectativas de los individuos, lo que cobra fundamental importancia a la hora de analizar las variables financieras agregadas de la economía de un país. A su vez, resulta de interés en materia de elecciones de política macroeconómica y también en la toma de decisiones de empresas e instituciones financieras (Fajardo, Ornelas y de Farias, 2012). Asimismo, existe evidencia empírica que sostiene que monitorear la aversión al riesgo agregada sirve para predecir crisis económicas (Coudert y Gex, 2008). Además, la conducta frente al riesgo de los sujetos afecta las decisiones de inversión que toman y a la estructura y tipos de activos que demandan (Conine, McDonald y Tamarkin, 2017). Por su parte, como se fundamenta más adelante en este trabajo, no se encuentran trabajos que aborden el estudio de la aversión al riesgo presente en decisiones de finanzas personales de los sujetos y que a su vez consideren activos no financieros en el marco de países emergentes, revelando la existencia de una brecha en la literatura académica sobre la temática. Siguiendo la línea de las ideas planteadas, el objetivo de esta tesis doctoral es estimar el nivel de aversión al riesgo de individuos argentinos presente en diferentes decisiones que toman sobre sus finanzas personales. Para logarlo, se realizan dos tipos de abordaje metodológico. El primero busca estimar el grado de aversión al riesgo a través de un diseño experimental, en el que se relevan preferencias declaradas desde una perspectiva subjetiva. El segundo, en cambio, consiste en estimar el nivel de aversión al riesgo que se encuentra implícito en precios de mercado de diferentes activos, desde una óptica objetiva, proponiendo un modelo específico para tal fin. De esta manera, se comienza realizando un estudio empírico experimental, en el que se pretende conocer el grado de aversión al riesgo de los individuos que se encuentra presente en decisiones de inversión y consumo, mediante la aplicación de cuestionarios y preferencias declaradas en situaciones hipotéticas. Asimismo, se busca describir y caracterizar las decisiones de inversión y consumo en el mercado local y vincular los niveles de aversión al riesgo al tipo de decisión. Además, el análisis contempla de qué manera influyen diferentes variables sociodemográficas en lo anterior. Al realizar la medición de las preferencias frente el riesgo, también se intenta determinar si éstas se encuentran afectadas por la magnitud de los montos monetarios considerados y por el hecho de tratarse de ganancias o pérdidas. Luego, en una segunda parte de la investigación, se apunta a determinar el grado de aversión al riesgo implícita en el precio de mercado de diferentes activos de la economía argentina. En primer lugar, se consideran activos de tipo financiero, específicamente, el dólar estadounidense, la tasa de política monetaria argentina y las acciones líderes del índice bursátil S&P Merval. Para ello se desarrolla un modelo de estimación que utiliza el concepto de equivalente de certeza y modela el comportamiento frente al riesgo de los agentes a partir de la función de utilidad con aversión al riesgo relativa constante (CRRA) y de la función de tres parámetros flexibles (FTP). Posteriormente y de manera comparativa, se utilizan datos sobre bienes de consumo e inversión personales de uso doméstico: inmuebles, vehículos y gastos en turismo, empleando el mismo método diseñado para los activos financieros, modelando el comportamiento de los individuos a partir de las funciones de utilidad mencionadas. Finalmente, se realiza una adaptación de la metodología desarrollada anteriormente, para aplicarla en la valoración de bienes inmobiliarios en Argentina, debido a la importancia de este tipo de activos en las finanzas personales de los individuos. Entre los principales resultados del experimento, se encuentra que la muestra presenta una aversión al riesgo promedio moderada, que se incrementa cuando aumentan los montos involucrados. Quienes perciben menores ingresos revelan mayor aversión al riesgo, al igual que las mujeres en relación a los hombres. Respecto a las decisiones de inversión y consumo, se observa que los individuos destinan gran parte de sus ahorros a inversiones y una pequeña proporción a consumo, una vez cubiertos los gastos corrientes domésticos. Respecto a los resultados de la estimación en activos financieros muestran que el coeficiente de aversión al riesgo implícito oscila entre 0,50 y 0,89 bajo el supuesto de CRRA, mientras que fluctúa entre 0,46 y 1,10 cuando se asume FTP. Esto indica un comportamiento de aversión al riesgo con ambas funciones, que varía de moderada a muy elevada según cuál de ellas se emplea. Mientras que, cuando se trata de bienes personales, dicho coeficiente toma valores cercanos a 0,50 en todos los casos si se adopta CRRA, en tanto que se encuentran entre 1,08 y 1,20 cuando se infiere mediante la función FTP. En este caso, también se encuentra un grado de aversión al riesgo entre moderado a muy elevado. El principal aporte del estudio radica en la metodología de estimación de la aversión al riesgo propuesta, el tipo de bienes considerados y las funciones de utilidad empleadas. En particular, el modelo tiene la característica de utilizar funciones de utilidad para valorar activos financieros, en lugar de tasas ajustadas por riesgo. Esto resulta especialmente útil en la valoración de decisiones en mercados emergentes, con precios de activos financieros poco diversificados, en contextos donde no se cumplen los supuestos de Capital Asset Pricing Model (CAPM), y para decisiones de inversión donde predominen los riesgos privados en contraposición a los de mercado. La principal conclusión de la tesis es que se encuentran comportamientos moderados de aversión al riesgo bajo preferencias declaradas, y comportamientos de aversión al riesgo moderados a muy elevados cuando se realiza una inferencia con datos de mercado. Además, se encuentran diferencias estadísticamente significativas entre las estimaciones realizadas para activos financieros versus las elaboradas para bienes personales. De forma global, esta investigación pretende aportar conocimiento sobre las preferencias y la toma de decisiones de los individuos, de manera de colaborar a futuro con el desarrollo de políticas públicas y de diferentes instrumentos de inversión, adaptados a las características específicas de los individuos, que permitan canalizar ahorro privado y de esta manera movilizar recursos hacia el sector productivo. El nivel de aversión al riesgo que presentan los agentes de una economía resulta una variable relevante para las decisiones que se tomen dentro de ésta, para los tipos y cantidades de activos que se demanden y para la formación de expectativas a futuro sobre las variables económicas fundamentales. Es por ello que los aportes realizados en esta tesis resultan de relevancia, tanto los referentes al grado de aversión al riesgo revelado a través de las diferentes perspectivas y metodologías, como las diferencias halladas en cuanto a los tipos de activos y las funciones de utilidad que se emplean para modelar su comportamiento. Adicionalmente, el encuadre que se le da al estudio desde el punto de vista de las finanzas personales contribuye a mejorar el conocimiento dentro de un campo que ha sido poco explorado por la literatura empírica / Within the field of finance, a study of the level of risk aversion presented by economic agents is interesting from different points of view. In the first place, it is related to knowledge about the expectations of individuals, which is of fundamental importance when analyzing the aggregate financial variables of a country's economy. At the same time, it is of interest in the matter of macroeconomic policy choices and also in the decision-making of companies and financial institutions (Fajardo, Ornelas and de Farias, 2012). Likewise, there is empirical evidence that monitoring aggregate risk aversion serves to predict economic crises (Coudert and Gex, 2008). In addition, the risk behavior of the subjects affects the investment decisions they make and the structure and types of assets they demand (Conine, McDonald and Tamarkin, 2017). On the other hand, as justified later in this work, no article was found to address the study of risk aversion present in the subjects’ personal finance decisions and also consider non-financial assets in the framework of emerging countries, revealing the existence of a gap in the academic literature on the topic. Following the line of the ideas raised, the objective of this doctoral thesis is to estimate the level of Argentine individuals’ risk aversion present in different decisions they make about their personal finance. To achieve this, two types of methodological approaches are carried out. The first seeks to estimate the degree of risk aversion through an experimental design, in which declared preferences are surveyed from a subjective perspective. The second, on the other hand, consists of estimating the level of risk aversion that is implicit in the market prices of different assets, from an objective point of view, proposing a specific model for this purpose. In this way, an experimental empirical study is carried out, in which it is intended to know the degree of individuals’ risk aversion present in investment and consumption decisions, through the application of questionnaires and declared preferences in hypothetical situations. Likewise, it seeks to describe and characterize investment and consumption decisions in the local market and link the levels of risk aversion to the type of decision. In addition, the analysis considers how different sociodemographic variables influence the above. When measuring preferences against risk, an attempt is also made to determine whether they are affected by the magnitude of the monetary amounts considered and by the fact that they are gains or losses. Then, in a second part of the investigation, the aim is to determine the degree of implicit risk aversion in the market price of different assets in the Argentine economy. First, financial assets are considered, specifically, the US dollar, the Argentine monetary policy rate and the leading stocks of the S&P Merval stock index. For this, an estimation model is developed that uses the concept of the certainty equivalent and models the risk behavior of the agents from the utility function with constant relative risk aversion (CRRA) and the function of three flexible parameters. (FTP). Subsequently and in a comparative way, data on personal consumption and investment goods for domestic use are used: real estate, vehicles and tourism expenses, using the same method designed for financial assets, modeling the individuals’ behavior from the mentioned utility functions. Finally, an adaptation of the previously developed methodology is made, to apply it in the valuation of real estate in Argentina, due to the importance of this type of assets in the individuals’ personal finances. Among the main results of the experiment, it is found that the sample presents a moderate average risk aversion, which increases when the amounts involved growth. Those who receive lower income reveal greater risk aversion, as do women in relation to men. Regarding investment and consumption decisions, it is observed that individuals allocate a large part of their savings to investments and a small proportion to consumption, once household current expenses have been covered. About the results of the estimation in financial assets, they show that the implicit risk aversion coefficient ranges between 0.50 and 0.89 under the CRRA assumption, while it fluctuates between 0.46 and 1.10 when FTP is assumed. This indicates risk-averse behavior with both functions, which varies from moderate to very high depending on which of them is used. Whereas, when it comes to personal property, this coefficient takes values close to 0.50 in all cases if CRRA is adopted, while they are between 1.08 and 1.20 when inferred using the FTP function. In this case, there is also a moderate to very high degree of risk aversion. The main contribution of the study lies in the proposed methodology for estimating risk aversion, the type of goods considered and the utility functions used. In particular, the model has the characteristic of using utility functions to value financial assets, instead of risk-adjusted rates. This is especially useful in the valuation of decisions in emerging markets, with little diversified financial asset prices, in contexts where the assumptions of the Capital Asset Pricing Model (CAPM) are not met, and for investment decisions where private risks predominate in as opposed to those of the market. The main conclusion of the thesis is that moderate risk aversion behavior is found under declared preferences, and moderate to very high risk aversion behavior when an inference is made with market data. In addition, statistically significant differences are found between the estimates made for financial assets versus those made for personal property. Overall, this research aims to provide knowledge about the preferences and decision-making of individuals, in order to collaborate in the future with the development of public policies and the design of different investment instruments, adapted to the specific characteristics of individuals, which allow channeling private savings and thus mobilize resources to the productive sector. The level of risk aversion presented by the agents of an economy is a relevant variable for the decisions made within it, for the types and amounts of assets that are demanded and for the formation of future expectations about the fundamental economic variables. That is why the contributions made in this thesis are relevant, both those referring to the degree of aversion to risk revealed through the different perspectives and methodologies, as well as the differences found in terms of the types of assets and the utility functions that they are used to model their behavior. Additionally, the framework given to the study from the point of view of personal finance contributes to improving knowledge within a field that has been little explored by the empirical literature

The subject of this thesis is the issue of reduction of the operating temperatures in the production and laying asphalt mixtures with a more specific focus on influencing the functional properties of these mixtures, especially low-temperature parameters. The thesis is notionally divided into two parts. The first part refers to the low-temperature asphalt mixtures and the second part pays the attention to asphalt mixtures with an added R-material. For production of asphalt mixtures in the first part of thesis were used five additives and for the second part were used a total of four different asphalt mixtures which differs in the participation of added R-material. Both parts are divided into a theoretical part, which discusses the existing experience, the use of these mixtures and the practical part, which analyses in detail the tested mixture ( the composition and preparation of tested specimens ) and deals with the result of laboratory test. In particular, it is a test of asphalt mixture resistance against the formation of frost cracks according to ČSN EN 12697-46 and by comparing the individual mixtures in comparison with the reference sample and among each other.

This diploma thesis focuses on the preparation of an operating system, a simulation environment and the creation of two laboratory exercises explaining network technologies. In the theoretical part protocols DHCP, FTP, TFTP, HTTP, and NAT service are described. The practical part focuses on the installation of ns-3 and GNS3 programmes and their utilization and settings on OS Ubuntu 18.10. Moreover, it deals with the preparation of laboratory exercises created in the simulation programmes mentioned above together with tutorials, self-check questions and HTTP server in the Python programming language.

The main object of this thesis was to design a computer network for small and medium companies which will be made among others from network server providing simple network control. The next task was to provide internet connection to subscribers of local area network, their security and access to common services. There had been discussed the choice of distribution of Linux operation system with regarding to demanded services, stability and long lasting operation in theoretical part. One part of the work is a theoretic preliminary to separate services, to the purpose of their using and to their weaknesses. The practical part deals with an installation and configuration of Debian operating system, launching the base services and the setting of selected monitoring programs.