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The paper "The Influence of Social Networks on Social Environment" explores the history of social networks and the circumstances of their emergence. In order to clarify the popularity of social networks, consumer behavior models are analyzed that force us to actively use social networks. What kind of money is given to individuals by social networks. The impact of political campaigns on social networks has been analyzed. It is based on research carried out by sociologists and psychologists on the use of social networks, their positive and negative consequences and influence on mood and well-being. The examples provided are how and what health disorders can be influenced by the excessive use of social networks. The history of the neurotransmitter assay and the scheme of its operation have been described and schematically described. How and under what circumstances social networking is associated with dopamine release. Based on scientists' experiments on dopamine. Provide expert insights on how social networks should be used safely to minimize negative health effects. The survey was based on a survey that was interviewed for fifty 20-30 years. Lithuanian citizens of the 19th century mostly live in Lithuania about social networking habits. Collected empirical data compared to global trends in social networking. There was also a survey on another addiction - sweets. The data were used to develop alternative measures to encourage more critical thinking about the excessive use of social networks.

The paper "The Influence of Social Networks on Social Environment" explores the history of social networks and the circumstances of their emergence. In order to clarify the popularity of social networks, consumer behavior models are analyzed that force us to actively use social networks. What kind of money is given to individuals by social networks. The impact of political campaigns on social networks has been analyzed. It is based on research carried out by sociologists and psychologists on the use of social networks, their positive and negative consequences and influence on mood and well-being. The examples provided are how and what health disorders can be influenced by the excessive use of social networks. The history of the neurotransmitter assay and the scheme of its operation have been described and schematically described. How and under what circumstances social networking is associated with dopamine release. Based on scientists' experiments on dopamine. Provide expert insights on how social networks should be used safely to minimize negative health effects. The survey was based on a survey that was interviewed for fifty 20-30 years. Lithuanian citizens of the 19th century mostly live in Lithuania about social networking habits. Collected empirical data compared to global trends in social networking. There was also a survey on another addiction - sweets. The data were used to develop alternative measures to encourage more critical thinking about the excessive use of social networks.

The paper "The Influence of Social Networks on Social Environment" explores the history of social networks and the circumstances of their emergence. In order to clarify the popularity of social networks, consumer behavior models are analyzed that force us to actively use social networks. What kind of money is given to individuals by social networks. The impact of political campaigns on social networks has been analyzed. It is based on research carried out by sociologists and psychologists on the use of social networks, their positive and negative consequences and influence on mood and well-being. The examples provided are how and what health disorders can be influenced by the excessive use of social networks. The history of the neurotransmitter assay and the scheme of its operation have been described and schematically described. How and under what circumstances social networking is associated with dopamine release. Based on scientists' experiments on dopamine. Provide expert insights on how social networks should be used safely to minimize negative health effects. The survey was based on a survey that was interviewed for fifty 20-30 years. Lithuanian citizens of the 19th century mostly live in Lithuania about social networking habits. Collected empirical data compared to global trends in social networking. There was also a survey on another addiction - sweets. The data were used to develop alternative measures to encourage more critical thinking about the excessive use of social networks.

Everyday a lot of people are required to prove their identity while using network services (e. g., email, bank, government institutions). Currently, there are a lot of various authentication methods, differing by their strengths and weaknesses. Though, the problem of secure authentication remains. During the recent years, blockchain technology has gain a lot of traction and is being experimented with and applied in various fields, such as, finance, insurance, medicine, Internet of things, etc. Blockchain applicability for user authentication and identity management is also being evaluated. The goal of this master's thesis is to create a blockchain based user authentication system, taking into account problems observed in related work of other authors. Literature on user authentication, blockchain and its practical applicability is analyzed in this thesis. Based on the analysis, a theoretical model for blockchain based user authentication system is proposed. Theoretical model is then implemented practically, and a prototype is created. Prototype consists of a newly developed \"Ethereum\" smart contract, used for managing users' authentication data and authentication itself. This smart contract is deployed to \"Ethereum\" blockchain network, which is used by two websites. When administrator registers a new user in the smart contract once, the user can authenticate to both of the websites even though the websites connect to different blockchain network nodes. User authentication information is stored in the blockchain and therefore synchronized between the network's nodes. Eventually, it is analyzed how the time needed to verify user authentication information in the created smart contract corelates with the number of registered users. The results are compared to other popular way of storing user authentication information – \"MySQL\" database.

Everyday a lot of people are required to prove their identity while using network services (e. g., email, bank, government institutions). Currently, there are a lot of various authentication methods, differing by their strengths and weaknesses. Though, the problem of secure authentication remains. During the recent years, blockchain technology has gain a lot of traction and is being experimented with and applied in various fields, such as, finance, insurance, medicine, Internet of things, etc. Blockchain applicability for user authentication and identity management is also being evaluated. The goal of this master's thesis is to create a blockchain based user authentication system, taking into account problems observed in related work of other authors. Literature on user authentication, blockchain and its practical applicability is analyzed in this thesis. Based on the analysis, a theoretical model for blockchain based user authentication system is proposed. Theoretical model is then implemented practically, and a prototype is created. Prototype consists of a newly developed \"Ethereum\" smart contract, used for managing users' authentication data and authentication itself. This smart contract is deployed to \"Ethereum\" blockchain network, which is used by two websites. When administrator registers a new user in the smart contract once, the user can authenticate to both of the websites even though the websites connect to different blockchain network nodes. User authentication information is stored in the blockchain and therefore synchronized between the network's nodes. Eventually, it is analyzed how the time needed to verify user authentication information in the created smart contract corelates with the number of registered users. The results are compared to other popular way of storing user authentication information – \"MySQL\" database.

Everyday a lot of people are required to prove their identity while using network services (e. g., email, bank, government institutions). Currently, there are a lot of various authentication methods, differing by their strengths and weaknesses. Though, the problem of secure authentication remains. During the recent years, blockchain technology has gain a lot of traction and is being experimented with and applied in various fields, such as, finance, insurance, medicine, Internet of things, etc. Blockchain applicability for user authentication and identity management is also being evaluated. The goal of this master's thesis is to create a blockchain based user authentication system, taking into account problems observed in related work of other authors. Literature on user authentication, blockchain and its practical applicability is analyzed in this thesis. Based on the analysis, a theoretical model for blockchain based user authentication system is proposed. Theoretical model is then implemented practically, and a prototype is created. Prototype consists of a newly developed \"Ethereum\" smart contract, used for managing users' authentication data and authentication itself. This smart contract is deployed to \"Ethereum\" blockchain network, which is used by two websites. When administrator registers a new user in the smart contract once, the user can authenticate to both of the websites even though the websites connect to different blockchain network nodes. User authentication information is stored in the blockchain and therefore synchronized between the network's nodes. Eventually, it is analyzed how the time needed to verify user authentication information in the created smart contract corelates with the number of registered users. The results are compared to other popular way of storing user authentication information – \"MySQL\" database.

Everyday a lot of people are required to prove their identity while using network services (e. g., email, bank, government institutions). Currently, there are a lot of various authentication methods, differing by their strengths and weaknesses. Though, the problem of secure authentication remains. During the recent years, blockchain technology has gain a lot of traction and is being experimented with and applied in various fields, such as, finance, insurance, medicine, Internet of things, etc. Blockchain applicability for user authentication and identity management is also being evaluated. The goal of this master's thesis is to create a blockchain based user authentication system, taking into account problems observed in related work of other authors. Literature on user authentication, blockchain and its practical applicability is analyzed in this thesis. Based on the analysis, a theoretical model for blockchain based user authentication system is proposed. Theoretical model is then implemented practically, and a prototype is created. Prototype consists of a newly developed \"Ethereum\" smart contract, used for managing users' authentication data and authentication itself. This smart contract is deployed to \"Ethereum\" blockchain network, which is used by two websites. When administrator registers a new user in the smart contract once, the user can authenticate to both of the websites even though the websites connect to different blockchain network nodes. User authentication information is stored in the blockchain and therefore synchronized between the network's nodes. Eventually, it is analyzed how the time needed to verify user authentication information in the created smart contract corelates with the number of registered users. The results are compared to other popular way of storing user authentication information – \"MySQL\" database.

Wireless sensor networks (WSNs) consist of many small battery powered nodes with wireless communication and sensing capabilities. This type of network has many possible applications in the scientific, military and commercial domains. Examples of these applications include environmental monitoring, surveillance and many others. Despite the fact that the main goal of the WSN is to monitor an area of interest, several primary objectives have to be achieved. The definition of self-localization system is one of these prerequisites required to make functional many of WSN applications that rely on location information. Therefore, we propose a self-localization system that is the ability of the nodes to self-conFig. among themselves to form a relative coordinate system. This system includes a special method that increases the longevity of the self-localization system according to changing energy situation in a dynamic WSN.

Wireless sensor networks (WSNs) consist of many small battery powered nodes with wireless communication and sensing capabilities. This type of network has many possible applications in the scientific, military and commercial domains. Examples of these applications include environmental monitoring, surveillance and many others. Despite the fact that the main goal of the WSN is to monitor an area of interest, several primary objectives have to be achieved. The definition of self-localization system is one of these prerequisites required to make functional many of WSN applications that rely on location information. Therefore, we propose a self-localization system that is the ability of the nodes to self-conFig. among themselves to form a relative coordinate system. This system includes a special method that increases the longevity of the self-localization system according to changing energy situation in a dynamic WSN.

Wireless sensor networks (WSNs) consist of many small battery powered nodes with wireless communication and sensing capabilities. This type of network has many possible applications in the scientific, military and commercial domains. Examples of these applications include environmental monitoring, surveillance and many others. Despite the fact that the main goal of the WSN is to monitor an area of interest, several primary objectives have to be achieved. The definition of self-localization system is one of these prerequisites required to make functional many of WSN applications that rely on location information. Therefore, we propose a self-localization system that is the ability of the nodes to self-conFig. among themselves to form a relative coordinate system. This system includes a special method that increases the longevity of the self-localization system according to changing energy situation in a dynamic WSN.

Wireless sensor networks (WSNs) consist of many small battery powered nodes with wireless communication and sensing capabilities. This type of network has many possible applications in the scientific, military and commercial domains. Examples of these applications include environmental monitoring, surveillance and many others. Despite the fact that the main goal of the WSN is to monitor an area of interest, several primary objectives have to be achieved. The definition of self-localization system is one of these prerequisites required to make functional many of WSN applications that rely on location information. Therefore, we propose a self-localization system that is the ability of the nodes to self-conFig. among themselves to form a relative coordinate system. This system includes a special method that increases the longevity of the self-localization system according to changing energy situation in a dynamic WSN.

This thesis aims to test feasibility of the hybrid model for wood chips price in Lithuania's market forecasting. Conducting literature review such model was found as most accurate and promising amongst all other time series models. Analysis of wood chips market and prices resulted in conclusion that market is in developing state and the subject of energy production using renewable energy sources is getting more attention in Lithuania and European Union. Based on the approach presented by Zhang (2003) hybrid model –combination of ARIMA and feedback non linear autoregressive neural network, was designed. As a result of met performance targets: forecasting accuracy, general fit and outperform benchmark –naïve random walk, the model was determined as feasible for the step ahead wood chips price in Lithuania's market forecasting. The findings of this thesis supplements general body of knowledge on hybrid models outperforming traditional approaches.

This thesis aims to test feasibility of the hybrid model for wood chips price in Lithuania's market forecasting. Conducting literature review such model was found as most accurate and promising amongst all other time series models. Analysis of wood chips market and prices resulted in conclusion that market is in developing state and the subject of energy production using renewable energy sources is getting more attention in Lithuania and European Union. Based on the approach presented by Zhang (2003) hybrid model –combination of ARIMA and feedback non linear autoregressive neural network, was designed. As a result of met performance targets: forecasting accuracy, general fit and outperform benchmark –naïve random walk, the model was determined as feasible for the step ahead wood chips price in Lithuania's market forecasting. The findings of this thesis supplements general body of knowledge on hybrid models outperforming traditional approaches.

Master's thesis object is the protection of personal information data on social networking sites. The aim of thesis is to analyze the protection of personal data on social networking sites and set the users' personal data publishing practices. The thesis tasks: to reveal the conception of social networking sites; clarify the popularity features of social networking sites; analyze the structure of social networking sites; examine the conception and protection of personal privacy and personal data; find the threats rising on social networking sites to the personal data as part of personal privacy; analyze personal data protection policy on social networking sites; determine the Lithuanian consumers attitude to the protection of personal data on Facebook.com website and compare it with foreign Facebook.com users' approach. Using the scientific literature analysis methods (analysis and comparative) the conception of social networking sites, emerging relations between users and the structure of these sites was defined. Using analytical and comparative methods the attention was drawn to importance of personal data protection on social networking sites and to threats related to data publicity. It is noted that in order to protect personal privacy and personal data on social networking sites the attitude and behavior of consumers is important. After examining the personal data protection politics published on social networking sites (two - foreign, two - Lithuania 's) by document analysis method and comparing these politics, it was observed that the structure, content and main identified conditions of these politics are similar. However, the examined sites on their personal data protection policy do not provide the purpose for which the personal data are collected. Also it was found that three of examined social networking sites, while user registration do not mention this policy (there is no reference to it). It follows, that social networking sites do not encourage users to be interested in the use of their personal data. Also, it was observed, that social networking sites assume that only by sharing personal information significant opportunities are provided for people to communicate with each other, so users are motivated to provide more information. Consequently, in order to avoid limit's decline between privacy and publicity the person himself should show more interest for whom and what purpose the information is provided. By applying empirical method (questionnaire survey), it was concluded that for Lithuanian users one of social networking sites - Facebook.com is an integral part of their daily activities. After research it was noticed that Lithuanian users provide most of self-identifying information but understanding the possible consequences of such publicity determines that majority uses privacy settings that prevent the data leaked. During survey results were compared with the results of overseas researches and it was observed that Lithuanian consumers of Facebook.com sites are more cautious - consider whom they take to the contact list, asses the threats rising to their privacy and personal data, notice the published personal data protection policy. It was assumed, that if social networking sites will not strengthen protection of personal data and will not abide by the policies posted - the number of Lithuanian users will decrease.

Master's thesis object is the protection of personal information data on social networking sites. The aim of thesis is to analyze the protection of personal data on social networking sites and set the users' personal data publishing practices. The thesis tasks: to reveal the conception of social networking sites; clarify the popularity features of social networking sites; analyze the structure of social networking sites; examine the conception and protection of personal privacy and personal data; find the threats rising on social networking sites to the personal data as part of personal privacy; analyze personal data protection policy on social networking sites; determine the Lithuanian consumers attitude to the protection of personal data on Facebook.com website and compare it with foreign Facebook.com users' approach. Using the scientific literature analysis methods (analysis and comparative) the conception of social networking sites, emerging relations between users and the structure of these sites was defined. Using analytical and comparative methods the attention was drawn to importance of personal data protection on social networking sites and to threats related to data publicity. It is noted that in order to protect personal privacy and personal data on social networking sites the attitude and behavior of consumers is important. After examining the personal data protection politics published on social networking sites (two - foreign, two - Lithuania 's) by document analysis method and comparing these politics, it was observed that the structure, content and main identified conditions of these politics are similar. However, the examined sites on their personal data protection policy do not provide the purpose for which the personal data are collected. Also it was found that three of examined social networking sites, while user registration do not mention this policy (there is no reference to it). It follows, that social networking sites do not encourage users to be interested in the use of their personal data. Also, it was observed, that social networking sites assume that only by sharing personal information significant opportunities are provided for people to communicate with each other, so users are motivated to provide more information. Consequently, in order to avoid limit's decline between privacy and publicity the person himself should show more interest for whom and what purpose the information is provided. By applying empirical method (questionnaire survey), it was concluded that for Lithuanian users one of social networking sites - Facebook.com is an integral part of their daily activities. After research it was noticed that Lithuanian users provide most of self-identifying information but understanding the possible consequences of such publicity determines that majority uses privacy settings that prevent the data leaked. During survey results were compared with the results of overseas researches and it was observed that Lithuanian consumers of Facebook.com sites are more cautious - consider whom they take to the contact list, asses the threats rising to their privacy and personal data, notice the published personal data protection policy. It was assumed, that if social networking sites will not strengthen protection of personal data and will not abide by the policies posted - the number of Lithuanian users will decrease.