The purpose of this two-wave longitudinal study was to investigate cross-lagged relations between sexual attitudes, perception of love and sex, and young adults’ relationship status over a period of one year. The current study tested two hypotheses: the first hypothesis assuming that sexual attitudes, perception of love and sex can be predictive of relationship status after a one-year interval; and the second hypothesis assuming that relationship status at T1 can be predictive of sexual attitudes and perception of love and sex after a one-year interval. Results from 117 Polish young adults (94 females and 23 males) aged 20–33 (M = 21.42, SD = 1.79) indicated that the conviction that sex is no longer as much a part of the relationship as it used to be (i.e., Sex is Declining scale) measured in the first assessment was a significant predictor of relationship status after a one-year interval. Furthermore, sexual attitudes and perception of love and sex at T1 were found to be predictive of sexual attitudes and perception of love and sex at T2. In addition, gender at T1 was predictive of instrumentality at T2, while being female at T1 related to higher instrumentality at T2.

The purpose of this paper is to analyse the silver hoards from 10th century Greater Poland in the context of the Piast “state” formation and try to explain the expansion of Piast rulership and power in relation to the long-distance trade.

The daily Czas ( Time) daily is an important source of the social and cultural history of Cracow in the period of Galician autonomy, including the White Carnival events at the turn of 1899 and 1900. This article discusses the Carnival's most spectacular events — the End of the Century festivities, the special Christmas and New Year's Eve celebrations as well as the White Carnival dance parties. The analysis of selected issues of Czas with relevant content is focused on the editorial choice of topics as well as the manner of their presentation.

When we look at the history of AGH – University of Science and Technology, recognized as one of the best universities in the country, we find that for that success many people worked for several dozen years. However, the subjects, the methodology and directions of their work were shaped by units – outstanding personalities of science. Just to mention, among others Professors Stanisław Zuber, Władysław Takliński, Witold Budryk, Maksymilian Tytus Huber and Władysław Bogusz. These people have shaped our institution, marked its new path of development and permanent place in the history of Polish and world science. To belong to such a group is a great ennoblement, for which one works out for his entire life. Undoubtedly, such personality was also Professor Zbigniew Witold Engel, to whom we said goodbye on November, 6th, 2013, in the St. Clement’s church in Wieliczka. Professor was born on April 1, 1933, in Zawady near Zhovkva in the province of Lviv. After graduating from Jan Matejko Middle and High School in Wieliczka in 1950 earned a matriculation certificate. Then he began his studies at the Department of Communications of Polytechnic Departments of Academy of Mining and Metallurgy and involved with our university for the next 63 years. October 1, 1952 the Department of Mechanics of the University of Mining and Metallurgy was created, and soon after began professor’s adventure that was the work of science, education and organization. The history and fate of our university are inextricably linked with the person of professor who practically since the very beginning of the Faculty supported it in all areas of its activities, and has always actively participated in academic life.

The paper aims to present directions of transformation of riverside areas in Wrocław implemented in 2012-2018 as well as planned investments within Przedmieście Oławskie revitalization program. Przedmieście Oławskie, a quarter housing estate from the turn of the 19th and 20th centuries is another area being regenerated in Wrocław after Nadodrze. The article outlines projects defined in the Local Revitalization Program for the years 2016-2018, responding to the identified deficits in spatial, social, environmental and economic spheres. The program proposes various projects that will create conditions for further actions. The challenges posed before the revitalization process mean the necessity of undertaking various projects and flexible planning for many years ahead. One of the key actions is a redevelopment of degraded Oława riverfront, which will be an activity and recreation space not only for residents of densely built-up and devoid of green areas Przedmieście Oławskie but also residents of Wroclaw. Modernization of the more than a kilometer section of the wharf can be an impulse for the development of the whole river corridor, that will have high natural, landscape and recreational values. The article discusses the planning process, objectives, principles and methodology of planned activities.

Potential sources of rare earth elements are sought after in the world by many researchers. Coal

ash obtained at high temperatures (HTA ) is considered among these sources.

The aim of the study was an evaluation of the suitability of the high temperature ash (HTA ) formed

during the combustion of bituminous coal from the Ruda beds of the Pniówek coal mine as an

potential resource of REY . The 13 samples of HTA obtained from the combustion of metabituminous

(B) coal were analyzed.

The analyses showed that the examined HTA samples varied in their chemical composition.

In accordance with the chemical classification of HTA , the analyzed ash samples were classified

as belonging to the following types: sialic, sialocalcic, sialoferricalcic, calsialic, fericalsialic,

ferisialic.

The research has shown that the rare earth elements content (REY ) in examined HTA samples

are characterized by high variability. The average REY content in the analyzed ashes was 2.5 times

higher than the world average (404 ppm).

Among rare earth elements, the light elements (LREY ) were the most abundant. Heavy elements

(HREY ) had the lowest share.

A comparison of the content of the individual rare earth elements in HTA samples and in UCC

showed that it was almost 20 times higher than in UCC.

The distribution patterns of REY plotted for all samples within their entire range were positioned

above the reference level and these curves were of the M-H or M-L type. The data presented indicate, that the analyzed ash samples should be regarded as promising REY

raw materials. Considering the fact that in 7 out of 13 analyzed ash samples the REY content was

higher than 800 ppm, REY recovery from these ashes may prove to be economic.

The impulse noise is agent harmful to health not only in the case of shots from firearms and the explosions of explosive materials. This kind of noise is also present in many workplaces in the industry. The paper presents the results of noise parameters measurements in workplaces where four different die forging hammers were used. The measured values of the C-weighted peak sound pressure level, the A-weighted maximum sound pressure level and A-weighted noise exposure level normalized to an 8 h working day (daily noise exposure level) exceeded the exposure limit values. For example, the highest measured value of the C-weighted peak sound pressure level was 148.9 dB. In this study possibility of the protection of hearing with the use of earplugs or earmuffs was assessed. The measurement method for the measurements of noise parameters under hearing protection devices using an acoustical test fixture instead of testing with the participation of subjects was used. The results of these measurements allows for assessment which of two tested earplugs and two tested earmuffs sufficiently protect hearing of workers in workplaces where forging hammers are used.

The paper presents a concept, a construction, a circuit model and experimental results of the double-rotor induction motor. This type of a motor is to be implemented in the concept of the electromagnetic differential. At the same time it should fulfill the function of differential mechanism and the vehicle drive. One of the motor shafts is coupled to the direction changing mechanical transmission. The windings of the external rotor are powered by slip rings and brushes. The inner rotor has the squirrel-cage windings. The circuit model parameters were calculated based on the 7.5 kW real single-rotor induction motor (2p = 4). Experimental verification of the model was based on comparison between the mentioned single-rotor motor and double-rotor model with the outer rotor blocked. The presented results showed relatively good compliance between the model and real motor.