In industrial processes electrical motors are serviced after a specific number of hours, even if there is a need for service. This led to the development of early fault diagnostic methods. Paper presents early fault diagnostic method of synchronous motor. This method uses acoustic signals generated by synchronous motor. Plan of study of acoustic signal of synchronous motor was proposed. Two conditions of synchronous motor were analyzed. Studies were carried out for methods of data processing: Line Spectral Frequencies and K-Nearest Neighbor classifier with Minkowski distance. Condition monitoring is useful to protect electric motors and mining equipment. In the future, these studies can be used in other electrical devices.

The influence of the refractory coating which is a mixture of silica flour and kaolin on the surface roughness of the plate castings produced

using evaporative patterns had been considered in this work. The kaolin was used as a binder and ratio method was employed to form basis

for the factorial design of experiment which led to nine runs of experiments. Methyl alcohol at 99% concentration was used as the carrier

for the transfer of the coating to the surface of the patterns. Pouring temperature was observed as a process parameter alongside the mix

ratios of the coating. Attempts were made to characterize the refractory coating by using two methods; differential thermal analysis (DTA)

and X-ray diffraction. Attempt was also made to characterize the casting material. Gating system design was done for the plate casting to

determine the correct proportions of the gating parameters in order to construct the gating system properly to avoid turbulence during

pouring of liquid metal. A digital profilometer was used to take the measurements of the surface roughness. It was observed that the mix

ratio 90% silica flour-10% kaolin produced the lowest value of the surface roughness of the plate castings and had the lowest material loss

in the DTA test. The pouring temperature of 650o

C produced best casting.

The operating principles of RFID antennas should be considered differently than it is applied in the classical theory of radio communication systems. The procedure of measuring the radiation pattern of antennas that could be applied to RFID transponders operating in the UHF band is seldom discussed correctly in the scientific literature. The problem consists in the variability of the RFID chip impedance that strongly influences measurement results. The authors propose the proper methodology for determining the radiation pattern with respect to an individual transponder as well as an electronically tagged object. The advantage of the solution consists in the possibility of using components of different measuring systems that are available in typical antenna laboratories. The proposed procedure is particularly important in terms of parameter validation - the identification efficiency and costs of an RFID system implementation can be evaluated properly only on the basis of real values of considered parameters.

An automated method for crack identification and quantitative description of crack systems in concrete was developed in order to aid a service life assessment of concrete elements in structures. Flat polished specimens for crack analysis were impregnated with epoxy resin containing fluorescent dye. The examination of the crack system was performed in ultraviolet light using a stereomicroscope and an Image Pro Plus image analysis system on specimens cored out of several concrete structures. The laboratory tests were performed on cast specimens to establish correlations between water penetration and chloride diffusion and crack system parameters. The analysis of cracks in concrete cores taken from structures resulted in interesting conclusions based on the crack width distribution and crack localization with respect to steel reinforcement. The method was found very effective to support standard concrete diagnostics methods.

In the paper a new method, called the Noise Scattering Pattern (NSP) method, for RTS noise identification in a noise signal is presented. Examples of patterns of the NSP method are included.

The author analyses onymic practices of Poznań–based craftsmen forming guilds. In the names of the inhabitants of Poznań, which stabilised until the end of the 18th century, she seeks traces of the so-called cognomens, i.e. secondary personal designations granted to apprentices who were becoming masters. The names resulted from community acts of creation, which were of ludic nature. Referring to German onymic practices and pointing to the so-called Schleifnamen, the author discusses specific codes of European middle-class culture. She focuses on the transfer of models and patterns to Polish urban communities.

This article explores caring through feeding as an important aspect of transnational family life, and analyzes the practices connected to sending food products home, supervising what the family eats, and changing consumption patterns. It focuses on Filipino migrants to the United States who maintain transnational ties with their families. With a history of colonial encounter, the United States has been a popular migration destination, and has also strongly influenced food consumption.

The study shows the ways in which packages from abroad (balikbayan boxes) express love and care, and how they allow migrants to control food consumption of the family in the country of origin. By looking at the goods the immigrants put in the packages, and the way these are received, it is possible to uncover the dynamics of love, care, and intimacy in transnational families, which often translate into power, tensions, and control among family-members. The article analyses how food products sent in the packages work, bringing with them new ideas and practices, creating imaginaries of migration, and building the social prestige of the immigrant. Using the concept of “social remittances”, the article also shows the changing patterns of food consumption in the Philippines.

The aim of this paper is to examine individual social remittances in the sphere of employment, against the background of the changing employment patterns and flexibilisation of work. Through an analysis of life stories of post-accession return migrants from the UK to Poland, it investigates the way in which returnees’ work experience gathered abroad impacts on their perception of employment standards in general. The revealed differences are understood as ‘potential social remittances’, i.e. the discrepancies acknowledged by returnees between the realities experienced during emigration and after their return (in this case to Poland). It is argued that the actualisation of the ‘potential social remittances’ depends on return migrants’ coping strategies as well as on the institutional and structural settings in returnees’ home country. The four main distinguished strategies are: re-emigration, activism, adaptation and en-trepreneurship.

One of the oldest ways of showing the practical realization of a call to holiness is the imitation of Christ. In the past this idea, with additional role models included, was also used in the moral theological refection on human development and sanctifcation. However, those attempts found it diffcult to defne the subject of imitation as well as imitation itself. Also today, with some reservations, the idea of imitation can be used for a methodical presentation of the Christian vocation to holiness and of concrete ways how this vocation can be realized. When taken together with the biblical category of the vocation and of the gift, this idea allows to present Christian moral life in a synthetic way and can be the reference point for specifc moral obligations. However, when using the category of imitation in the correct presentation of a call to holiness, correct terms are needed as well as an understanding of the vocation as found in Revelation and in particular and modern behavioural sciences. Such a presentation would emphasize important features of Christian morality, especially its religious, personalistic and social character, and would manifest misconceptions of both extreme autonomy and extreme heteronomy.

The aim of this paper is twofold. Firstly, I present the scholarly book publications patterns of Polish scholars. Secondly, I show how scholarly book publications are assessed in various European research evaluation systems. Moreover, I argue that the diversity of evaluation models depends on the scientific policy aims in a given country. This presentation of European models allows me to discuss a new Polish science policy instrument, that is the list of publishers prepared for the upcoming evaluation exercise in 2021. In 2018, the Ministry of Science and Higher Education in Poland implemented a new model of scholarly book publication assessment based on the list of publishers. On the one hand, such a science policy instrument might be a way to appreciate the best quality scholarly books and give them more points than articles in the evaluation exercise. On the other hand, it is a so far unknown instrument which differentiates publications that have been treated the same up to date. Additionally, this paper aims to shed some light on how the new Polish model was prepared.

The δ18O data for the last 8000 years in the Greenland NGRIP1, GRIP, DYE-3 and GISP2 ice cores have been analyzed stratigraphically in search of potentially meaningful boundaries and units. Pattern matching of the profiles is supported by using graphical display enhancements, calculating spectral trend curves and generating a compound profile. Techniques routinely used in subsurface geology have been applied in correlating the profiles. Four major stratigraphic units are identified (8.1–4.9, 4.9–3.3, 3.3–1.9 and 1.9–0.1 ka b2k), resulting in an improved understanding of the climate change after the Holocene Climate Optimum. Correlatable higher-order boundaries are identified within these units. The layers between the boundaries show δ18O patterns which generally are similar in character, the differences being ascribed to lateral variations in the factors that control the isotope content of the ice. The layering forms a series of short-lived low-amplitude aperiodic oscillations on a centennial time scale. The suggestion is that these higher-order boundaries and δ18O oscillations have climatic significance. Equivalent units are tentatively identified in ice-core data from the Agassiz and Renland ice caps. Comparison with other climate proxies or stratigraphies from the Northern Hemisphere is expected to render support for the here proposed scheme. It will then serve to guide and constrain the analysis of the dynamics of the climatic fluctuations for the study period.

Gas-liquid two-phase flow in minichannels has been the subject of increased research interest in the past few years. Evaluation, however, of today's state of the art regarding hydrodynamics of flow in minichannels shows significant differences between existing test results. In the literature there is no clear information regarding: defining the boundary between minichannels and conventional channels, labelling of flow patterns. The review of literature on the hydrodynamics of gas-liquid flow in minichannels shows that, despite the fact that many research works have been published, the problem of determining the effect of diameter of the minichannel on the hydrodynamics of the flow is still at an early stage. Therefore, the paper presents the results of research concerning determination of flow regime map for the vertical upward flow in minichannels. The research is based on a comprehensive analysis of the literature data and on the research that has been carried out. Such approach to the mentioned above problems concerning key issues of the two-phase flow in minichannels allowed to determine ranges of occurrence of flow structures with a relatively high accuracy.

Technology advancements entail a necessity to remove huge amounts of heat produced by today’s electronic devices based on highly integrated circuits, major generators of heat. Heat transfer to boiling liquid flowing through narrow minichannels is a modern solution to the problem of heat transfer enhancement. The study was conducted for FC-72 boiling in a rectangular, vertical and asymmetrically heated minichannel that had depths of 0.5-1.5 mm, a width of 20 mm and a length of 360 mm. The heat flux increased and decreased within the range of 58.3-132.0 kWm−2, the absolute pressure ranged from 0.116 to 0.184 MPa and the mass flux was 185-1139.2 kgm−2s−1. The boiling process took place on a flat vertical heating surface made of Haynes-230 0.1 mm thick acid-proof rolled plate with the surface roughness of 121 μm.