Rafał Wojciechowski

Self-configuration Networks

The observation of the network behavior and the quantitative description of the network condition is one of the most important activities for network administrators and analysts. Networks are dynamically changing over time, while their structure stays fixed traffic or device load can rapidly change causing networking failures, inaccessibilities or delays due to nodes overload. The article is focused on the active monitoring and configuration of network nodes using the general common standards. The work concerns a design of a decision system based on predefined actions invoking network reconfiguration when observed parameters exceed acceptable limits. The general concept of the self-configuration networks system is presented; the architecture, requirements and basic activities are widely discussed.

System of Distance Measurement and Localization of Wireless Devices Communicating Based on Bluetooth Technologies

Personal wireless networks are very popular nowadays. Wireless networks administrators have access to a great deal of information about users. They may use selected information in order to try to locate a devices who is active in a network. A mechanism has been implemented which enables the user to locate devices communicating based on bluetooth technologies, using coordinates or references to characteristic points.

Automation of selected brazes' dynamic properties in high-temperatures' measurement process

Abstract The good quality of several manufactured components frequently depends on solidliquid interactions existing during processing. Nowadays, the research in material engineering focuses also on modern, automatic measurement methods of joining process properties, i.a. wetting force and surface tension, which allows for quantitative determination of above mentioned parameters. In the paper, the brazes’ dynamic properties in high-temperatures’ measurement methodology and the stand for automatic determination of braze’s properties, constructed and implmented within the research grant nr KBN N N519 441 839 - An integrated platform for automatic measurement of wettability and surface tension of solders at high temperatures, are widely described

Integrated Platform for Automatic Measurement of Wettability and Surface Tension of Liquid Metals and Alloys in the High Temperatures

Abstract The article presents the construction of a new device that has been formed within the frames of a grant nr KBN N N519 441 839 - An integrated platform for automatic measurement of wettability and surface tension of solders at high temperatures. The authors have presented methodology and analytical concept of surface tension measurement using maximum pressure in gas bubble method. The results of examplary experiments are presented.