Technical Transactions

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Investigations into wastewater composition focusing on nonwoven wet wipes

R.-L. Mitchell, P. U. Thamsen, M. Gunkel, J. Waschnewski

Technical Transactions > 2017 > Vol. 1(114) > 125--135

This paper summarizes the problems caused for wastewater systems by changing wastewater composition, especially the increasing use of nonwoven wet wipes and their disposal via the toilet. The nonwoven wet wipes do not disintegrate in the sewer system as paper-based toilet does, but accumulate to large agglomerations that can block the system and clog pumps. This not only reduces the operational safety...

article

Active ingredients in paint strippers

G. Kurowski, O. Vogt, J. Ogonowski

Technical Transactions > 2017 > Vol. 1(114) > 41--52

The papers presents the study on the application of acetals as active ingredients in paint strippers. The formulation was prepared and the ability to wrinkling of the shell was rated. The ability to wrinkling of the shell was rated by examining the force required to detachment the coating.

article

Water sensitive design potentials in Paris, Berlin, and Budapest revisited

D. Csizmadia, I. Säumel, L. Pille, K. Szilágyi, more

Technical Transactions > 2017 > Vol. 1(114) > 113--123

Impacts of extreme weather events are increasing due to ongoing climate change. Floods in the urban areas not just damage properties but also threat human life. Coping with these challenges in metropolises of old Europe is difficult as the ex-istent building structures and combined rainwater and sewage systems originating from the 19th century. We compare three old European capital cities (Berlin,...

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Simple models for determination of the differences of ground and building foundation response spectra in LGC region

K. Kuźniar, T. Tatara

Technical Transactions > 2017 > Vol. 1(114) > 65--77

The paper deals with the transmission of mine-induced vibrations in the LGC region from the ground to the foundations of typical buildings. The simple, easy-to-use models have been proposed for the determination of the differences (relations) between ground and foundation acceleration response spectra. Experimentally obtained acceleration response spectra from vibrations occurring simultaneously on...

article

Digital filters: hermitian, antihermitian, unitary and their applications

M. Siwczyński, M. Jaraczewski

Technical Transactions > 2017 > Vol. 1(114) > 101--112

The paper presents the relation between the three types of noncausal digital filters: unitary, Hermitian and antihermitian filters. A decomposition has been made of a causal filter into a Hermitian and unitary filter cascade, and the use of this decomposition to calculate the electric power quality of receivers has been highlighted. Reference has also been made to the analogy between the set of unitary...

article

Anamorphic images on the historical background along with their classification and some selected examples

A. Zdziarski, M. Jonak

Technical Transactions > 2017 > Vol. 1(114) > 25--40

Art based on optical illusions has accompanied the everyday life of a human being since ancient times, until today. Primarily, it played a specific role as an artistic game and manifested the artists' own mastery, while often playing the serviceable role of an artistic advertisement. This study presents a detailed definition of anamorphic images together with their precise classification, and provides...

article

The laser scanning in the digitization process of relictually preserved architectural details

Ł. Łukaszewski

Technical Transactions > 2017 > Vol. 1(114) > 79--84

Protection of cultural heritage in recent times is of a very important significance. The priority task is to secure the existing facilities in such a way that they can now and in the future serve as a representations of the areas and be a treasure house of knowledge for both current and future generations. Through the development of new technologies and applying them by maintenance staff and those...

article

AC low frequency conductivity in PZT PFS ferroelectric ceramics

A. Osak

Technical Transactions > 2017 > Vol. 1(114) > 173--185

Low frequency AC conductivity has been studied in ferroelectric ceramics PZT + PFS (Pb[(Fe_1/3Sb_2/3)_xTi_yZr_z]O₃with x = 0.1 and y = 0.43, 0.44, 0.47) using Fourier transformation of charging and discharging currents. The results are interpreted in terms of fractal structure of the randomly generated clusters formed by sequentially correlated hopping paths of charge carriers.

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Evolution of the polychromy in L'viv architecture in the period of the second half of the 17_thcentury to the first half of the 19_thcentury

T. Kazantseva

Technical Transactions > 2017 > Vol. 1(114) > 5--23

The article deals with the question of the evolution of polychromy in the L'viv architecture in the period of the second half of the 17_thcentury to the first half of the 19_thcentury. On the base of field and historical research, the author considers polychrome techniques, the colour palette, and the main principles and peculiarities of polychromy use on the façades and interiors of L'viv buildings...

article

On the uniqueness of solutions to parabolic semilinear problems under nonlocal conditions with integrals

L. Byszewski, T. Wacławski

Technical Transactions > 2017 > Vol. 1(114) > 155--171

The uniqueness of classical solutions to parabolic semilinear problems together with nonlocal initial conditions with integrals, for the operator [mathematical equation] in the cylindrical domain D:= D₀x(t₀, t₀+ T) ⊂ ℜⁿ⁺¹, where t₀∈ ℜ, 0 < T < ∞, are studied. The result requires that the nonlocal conditions with integrals be introduced.

article

An abstract nonlocal functional-differential second order evolution problem

L. Byszewski

Technical Transactions > 2017 > Vol. 1(114) > 147--154

The aim of the paper is to prove two theorems on the existence and uniqueness of mild and classical solutions of a semilinear functional-differential evolution second order equation together with nonlocal conditions. The theory of strongly continuous cosine families of linear operators in a Banach space is applied. The paper is based on publications [1–9] and is a generalization of paper [6].

article

A comparative analysis of two methods for determining the influence of vibrations on people in buildings

A. Kowalska-Koczwara, K. Stypuła

Technical Transactions > 2017 > Vol. 1(114) > 53--64

Different methodologies for the assessment of the influence of vibrations on people residing in buildings can be found in international standards. There are two dominant methods of assessment: the analysis of the RMS values in 1/3 octave bands and vibration dose VDV. In this article, these two methods of assessing the influence of vibration on humans are compared, not only on the basis of standard...

article

CuO/TiO₂and Cu₂O/TiO₂nanoparticles influence on parameters of bulk heterojunction organic solar cells

G. Lewińska, J. Sanetra

Technical Transactions > 2017 > Vol. 1(114) > 165--171

This publication presents a study conducted for related pyrazoloquinoline doped nanoparticles CuO/TiO₂and Cu₂O/TiO₂. The mixtures were used as the active material for the construction of photovoltaic cells.

article

Microplastics in urban water management

D. Venghaus, M. Barjenbruch

Technical Transactions > 2017 > Vol. 1(114) > 137--146

The paper is discussing microplastics in the effluent of wastewater treatment plants and other discharges from urban areas. The aim of the discussion is to expose the challenges related to sampling and detecting plastic particles in treated wastewater. The different types of microplastics and a rough estimation of the amount of plastic which could end up in the aquatic environment is given. The work...

article

Vibrations of free-field and building caused by passages of the Pendolino train

K. Stypuła, T. Tatara

Technical Transactions > 2017 > Vol. 1(114) > 85--100

The objective of the paper was to conduct dynamic measurements of free-field vibrations in three profiles and establish decay relations of propagating vibrations. The sources of vibrations were passages of the Pendolino train with dedicated speeds from 40 to 293 km/h. In each profile, soil properties tests were carried out. Based on the data for a few selected speeds of the Pendolino train’s passages,...

article

Stress state laboratory verification in masonry structures according to the flat jack method

D. Łątka

Technical Transactions > 2017 > Vol. 2(114) > 119--128

In the article, the value of compressive stress defined according to the flat jack method with a theoretical value of the stress was compared. The test was performed in a laboratory using part of the 38 cm thick masonry wall according to the procedure described in the A STM C1196 – 14a Standard. Significant correspondence between the obtained results confirms that this diagnostic method is useful...

article

The production and properties of micro-extruded low-density polyethylene microtubes

K. Głogowska, J. W. Sikora

Technical Transactions > 2017 > Vol. 2(114) > 155--166

Micro-extrusion is the process of obtaining microtubes with either simple or complex cross-sections which are used for the high-precision transport and protection of various of media. Through this process, it is possible to create tubing with interior diameters and wall thicknesses as small as 0.1 mm and 0.05 mm respectively. Micro-extruded tubing such as micro catheters and peripheral intravenous...

article

Comparison of results of stress cycle counting by the direct spectral method and the Fu-Cebon method for bi-modal type stress processes

M. S. Kozień, D. Smolarski

Technical Transactions > 2017 > Vol. 2(114) > 167--177

This article compares the results of a high cycle fatigue analysis obtained through the application of the two methods dedicated to analysis of response of the structure of the bi-modal type – the direct spectral method and the Fu-Cebon one. The compared parameter is the lifetime for an assumed material S–N curve and stress spectrum defined in an article by Fu & Cebon.

article

Comparison of temperature and displacements of a gravity section and a buttress section illustrated with the example of concrete dam in Rożnów

A. Kasprzak, P. Popielski

Technical Transactions > 2017 > Vol. 2(114) > 91--103

This paper presents the results and the process of numerical analysis of a selected section of the concrete dam in Rożnów. The calculations were carried out for two different variants: the gravity section and the buttress section. The effects of the geometry on the temperature distribution inside the section, and the effect of the temperature on displacements, were examined.

article

Characteristics of selected methods for the synthesis of nanometric zirconium oxide – critical review

J. Kwaśny, W. Balcerzak

Technical Transactions > 2017 > Vol. 2(114) > 105--118

High chemical stability, resistance to changes in the pH, pressure and temperature meant that zirconium oxide is widely used in many fields. It is used in water treatment and waste water treatment processes, as well as air purification. In this paper, selected methods of nano-zirconia synthesis in liquid phase were characterized. These methods include, among others, the microemulsion method. Based...

INFONA - science communication portal

Technical Transactions

Investigations into wastewater composition focusing on nonwoven wet wipes

Active ingredients in paint strippers

Water sensitive design potentials in Paris, Berlin, and Budapest revisited

Simple models for determination of the differences of ground and building foundation response spectra in LGC region

Digital filters: hermitian, antihermitian, unitary and their applications

Anamorphic images on the historical background along with their classification and some selected examples

The laser scanning in the digitization process of relictually preserved architectural details

AC low frequency conductivity in PZT PFS ferroelectric ceramics

Evolution of the polychromy in L'viv architecture in the period of the second half of the 17_thcentury to the first half of the 19_thcentury

On the uniqueness of solutions to parabolic semilinear problems under nonlocal conditions with integrals

An abstract nonlocal functional-differential second order evolution problem

A comparative analysis of two methods for determining the influence of vibrations on people in buildings

CuO/TiO₂and Cu₂O/TiO₂nanoparticles influence on parameters of bulk heterojunction organic solar cells

Microplastics in urban water management

Vibrations of free-field and building caused by passages of the Pendolino train

Stress state laboratory verification in masonry structures according to the flat jack method

The production and properties of micro-extruded low-density polyethylene microtubes

Comparison of results of stress cycle counting by the direct spectral method and the Fu-Cebon method for bi-modal type stress processes

Comparison of temperature and displacements of a gravity section and a buttress section illustrated with the example of concrete dam in Rożnów

Characteristics of selected methods for the synthesis of nanometric zirconium oxide – critical review

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