Material parameters identification by inverse analysis using finite element computations leads to the resolution of complex and time-consuming optimization problems. One way to deal with these complex problems is to use meta-models to limit the number of objective function computations. In this paper, the Efficient Global Optimization (EGO) algorithm is used. The EGO algorithm is applied to specific objective functions, which are representative of material parameters identification issues. Isotropic and anisotropic correlation functions are tested. For anisotropic correlation functions, it leads to a significant reduction of the computation time. Besides, they appear to be a good way to deal with the weak sensitivity of the parameters. In order to decrease the computation time, a parallel strategy is defined. It relies on a virtual enrichment of the meta-model, in order to compute q new objective functions in a parallel environment. Different methods of choosing the qnew objective functions are presented and compared. Speed-up tests show that Kriging Believer (KB) and minimum Constant Liar (CLmin) enrichments are suitable methods for this parallel EGO (EGO-p) algorithm. However, it must be noted that the most interesting speed-ups are observed for a small number of objective functions computed in parallel. Finally, the algorithm is successfully tested on a real parameters identification problem.

Resistance spotwelding is the most significant joining technique utilized in various industries, like automotive, boilers, vessels, etc., that are commonly subjected to variable tensile-shear forces due to the unsuitable use of the input spot welding variables, which mainly cause the welded joints failure during the service life of the welded assembly. So, in order to avoid such failures, the welding quality of some materials like aluminum must be improved taking into consideration the performance and weight saving of the welded structure. Thus, the need for optimizing the used welding parameters becomes essential for predicting a goodwelded joint.Accordingly, this study aims at investigating the influence of the spot welding variables, including the squeeze time, welding time, and current on the tensile-shear force of the similar and dissimilar lap joints for aluminum and steel sheets. It was concluded that the use of Taguchi design can improve the welded joints strength through designing the experiments according to the used levels of the input parameters in order to obtain their optimal values that give the optimum tensile-shear force as the response. As a consequence of the present work, the optimal spot welding parameters were successfully obtained.

The main purpose of the publication is to determine what knowledge was available to Polish women about the situation of women and feminist organizations in Europe and on other continents? What picture of the activities of these organizations was presented by the Women’s League press bodies? By using the classic method of analyzing and criticizing the content of the press, and as an auxiliary methodology of monographic research, it was possible to find answers to these and similar questions. Studies have shown, among others what role such organizations as the Democratic Committee of Bulgarian Women and the Democratic Union of Finnish Women played in the emancipation processes.

This article looks at the history and contents of the quarterly Dawna Sztuka [Old Art] published in Lwów in (1938–1939), dedicated to the history of art and archaeology. Founded by Professor Stanisław Jan Gąsiorowski, the periodical was intended, among others, as a platform for establishing ties with researchers from abroad and presenting the work of Polish archaeologists and art historians to the academic community and readers all over the world.

The assassination of the Mayor of Gdańsk Paweł Adamowicz in Poland’s leading national newspapers, This article compares the coverage of the incident in six print dailies (Gazeta Wyborcza, Rzeczpospolita, Nasz Dziennik, Gazeta Polska Codziennie, and two tabloids Fakt and Super Express) over a period of two weeks (14–26/27 January). Their presentation of the story differed considerably. There were marked differences not only in the total amount of space the individual papers devoted to the Adamowicz’s murder and its fallout, but also the way they selected, described and interpreted various points, and sought to contextualize it by introducing additional themes.

In paper was presented a publishing history of two Lithuanian periodicals from the beginning of 19-th century — Dziennik Wileński [Vilnius Journal], published between 1805–1806 and Gazeta Literacka Wileńska [Literary Magazine of Vilnius], issued from January until December 1806. Both publishing projects were connected with the name of their editor — Gotfryd Ernest Groddeck who brought into existence the first from mentioned journals as the literary counterbalance to Dziennik which was focused mainly on science. Unfortunately, lasting year competition brought them about finish of their issuing.

The purpose of the study is a synthetic presentation of the development of children’s magazines in Poland from their creation to the end of World War I. The main focus of interest and research are magazines for younger and older children (up to 15 years of age) published in the Polish language across the ethnic and historical Polish territories. Periodicals published in this area in other languages (German, Russian, Belorussian, Ukrainian, Lithuanian, Yiddish, and Hebrew), one-days and calendars, school magazines, scouting and ethical magazines, and of course youth and student press were omitted. In the course of the research, it is established that 177 titles addressed to young recipients appeared in the examined period, 25 of which were published in the years 1824–1863, and 152 in the subsequent period.

This article surveys the relations between the Polish Radio and the German Broadcasting Corporation (Reichs-Rundfunk-Gesellschaft) in the interwar period. In its early phase the relationship was overshadowed by disputes over programmes on Upper Silesia and the takeover by a German company of the radio station in the Free City of Gdańsk (Danzig). After Hitler became chancellor in 1933 there was a marked improve- ment in relations: the two parties even made an agreement to relay each other's programmes. However, in September 1939 the German radio network (RRG) actively aided the German army in its invasion of Poland.

The second part of this article examines the content of the main sections of the weekly magazine Przyjaciel Dzieci [The Children’s Friend] (1892–1911), i.e. popular science; travel, geographical and ethnographical materials; biography; a section called “teaching actions”; and religion. Also covered are miscellanea, practical tips, puzzles and cartoons, as well as new sections “About the World” and “Educational Games and Entertainment”. Finally, the article looks at a review published by Poradnik dla Czytających Książki [A Guide for Book Readers] in 1901, whose author claims that some of the information in Przyjaciel Dzieci is outdated or obsolete.