Tilannekuvan muodostaminen tietojärjestelmistä

As the complexity of networks increases, new tools need to be implemented in order to maintain control over the connected devices. The thesis presents a way to reach situation awareness in computer system in a cost-effective way without compromising flexibility and scalability. The definition in situation awareness in cyber security context includes i.e. that one needs to be aware of the current situation, how situations evolve and why and how the current situation is caused. In order to achieve situation awareness, two tools are presented: monitoring system and log analytics platform. Monitoring system is a proactive system which keeps track of status about all the devices and services conigured to be monitored. The status and received events are stored for later usage, and graphs are drawn based on values of different services and statuses. Log analytics platform is a reactive system which provides insight into structured and enriched log data. It can visualize the log data, analyze and alarm based on pre-defined rules and utilize machine learning for anomaly detection. These two systems are integrated together using alarming feature of the monitoring system, so that logs can be linked to the exact device in monitoring system, hence collecting the relevant data in one centralized view so that the incidents can be investigated further on log analytics platform. Together they provide deep insight into the computer system and enable situation awareness

Tilannekuvan muodostaminen tietojärjestelmistä

As the complexity of networks increases, new tools need to be implemented in order to maintain control over the connected devices. The thesis presents a way to reach situation awareness in computer system in a cost-effective way without compromising flexibility and scalability. The definition in situation awareness in cyber security context includes i.e. that one needs to be aware of the current situation, how situations evolve and why and how the current situation is caused. In order to achieve situation awareness, two tools are presented: monitoring system and log analytics platform. Monitoring system is a proactive system which keeps track of status about all the devices and services conigured to be monitored. The status and received events are stored for later usage, and graphs are drawn based on values of different services and statuses. Log analytics platform is a reactive system which provides insight into structured and enriched log data. It can visualize the log data, analyze and alarm based on pre-defined rules and utilize machine learning for anomaly detection. These two systems are integrated together using alarming feature of the monitoring system, so that logs can be linked to the exact device in monitoring system, hence collecting the relevant data in one centralized view so that the incidents can be investigated further on log analytics platform. Together they provide deep insight into the computer system and enable situation awareness

Equilibrium of Copper Matte and Silica-Saturated Iron Silicate Slags at 1300 °C and PSO2 of 0.5 atm

Experimental study on the phase equilibria between copper matte with silica-saturated iron silicate slags was conducted at 1300 °C and PSO2 = 0.5 atm. The high-temperature isothermal equilibration in silica crucibles under controlled flowing CO-CO2-SO2-Ar was followed by quenching in an ice–water mixture and direct phase composition analyses by an electron probe X-ray microanalyzer. The equilibrium compositions for matte and slag, as well as the distribution coefficients, were displayed as a function of matte grade. The data set obtained at PSO2 = 0.5 atm and the previous study at PSO2 = 0.1 atm by the authors enabled an investigation on the impacts of PSO2 as well as Al2O3 and CaO additions on phase equilibria in the multiphase copper matte smelting system. Thermodynamic calculations using MTDATA software were performed to compare the experimental results with modeling. The present results enrich the fundamental thermodynamic information for the matte/slag/tridymite/gas equilibria in the primary copper smelting process at high PSO2.Peer reviewe