The aim of the article is to analyze existing foreign experiences presented in the literature in the field of estimating demolition waste and their applicability in Poland condition. Using the case study method for more than a dozen objects, the authors prove the necessity to verify the suitability of the proposed models in relation to regional conditions (e.g. climatic conditions, local technologies, etc.). The amount of concrete waste from demolition of objects made in the analyzed technology is characterized by a low coefficient of variation, especially in the case of public facilities and is only 10%. However, in the case of residential buildings, the volatility was 16,7%. The calculated average index of concrete waste was compared with the two literature models. The results obtained differ from the values obtained from the models. Based on an analysis of the advantages and disadvantages of the selected models and their assumptions, a proposal has been formulated for the development of an effective tool for estimating demolition waste taking into account regional specific conditions together with the concept of sustainable construction. The focus was on waste from demolition of concrete objects.
In this study, the issue of intensity of cargo train-induced soil vibrations is presented. Oscillations were measured in Warsaw-Rembertow location with application of set of seismic receivers. The analysis concerns the ground vibration differentiation issue, depending on considered direction of oscillation propagation plane. Statistic distribution of vibration intensity for directions in 3-D space were done. The issue of potential effect on engineering structures of recorded vibrations was raised. The impact based on Scale of Dynamic Effects standard was estimated in the article. Vibration intensity results were also compared with classification according to the Swiss Standard.
This article examines the jubilee book Nasz Plon [Our Harvest] prepared by editors of the Warsaw weekly magazine [Children’s Friend] (1861–1915) to mark the golden anniversary of its first issue. Set to appear in April 1911, its publication, plagued by various delays, did not take place until the following year. The volume, edited in a rather unprofessional manner (probably by Jadwiga Chrząszczewska), was full of errors ranging from misprints to all kinds of factual blunders. Yet, despite its faults it has a special place in the history of the Polish press: it was the first jubilee book of a children’s magazine and thus a notable sign of the rising social status of the children’s magazines.