background: the purpose of this work is to discover and analyze errors and incidents in some radiotherapy centers, and to introduce methods that could reduce their occurrences, especially those which had happened due to the use of improper and inadequate equipment. this work is a first step toward clarifying the role of education in a risk-conscious culture, and changing the attitude of radioth...

Gas tungsten arc welding is fundamental in those industries where it is important to control the weld bead shape and its metallurgical characteristics. However, compared to the other arc welding process, the shallow penetration of the TIG welding restricts its ability to weld thick structures in a single pass (~ 2 mm for stainless steels), thus its productivity is relativity low. This is why th...

A commonly-used and naive solution to process data with missing attribute values is to ignore the instances which contain missing attribute values. This method may neglect important information within the data, significant amount of data could be easily discarded, and the discovered knowledge may not contain significant rules. Some methods, such as assigning the most common values or assigning ...

Empirical work in macroeconomics almost universally relies on the hypothesis of rational expectations. This paper departs from the literature by considering a variety of alternative expectations formation models. We study the econometric properties of a popular New Keynesian monetary DSGE model under different expectational assumptions: the benchmark case of rational expectations, rational expe...

We study the lags with which new technologies are adopted across countries, and their penetration rates once they are adopted. Using data from the last two centuries, we estimate both the extensive and the intensive margins of technology adoption. We document two new facts: there has been convergence in adoption lags between rich and poor countries, while there has been divergence in penetratio...

Pentesting is becoming an important activity even for smaller companies. One of the most important economic pressures is the cost of such tests. In order to automate pentests, tools such as Metasploit can be used. Post-exploitation activities can, however, not be automated easily. Our contribution is to extend Meterpreter-scripts so that postexploitation can be scripted. Moreover, using a multi...