Periodica Polytechnica (Budapest University of Technology and Economics)
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The Impact of Socio-Demographic Variables on Pro-Environmental Behaviour
Get PDFThere is growing evidence that human society has already entered the age of global environmental crises. As human behaviour is undoubtedly contributing to environmental problems, it is important to analyse pro-environmental behaviour. Socio-demographic variables are widely used to investigate individual behaviour; the aim of this study was to analyse how they influence pro-environmental behaviour in a Central and Eastern European country. An online survey was conducted among 442 participants aged 18+ in Hungary, and Spearman's rho, Mann-Whitney U test, Kruskal-Wallis test univariate ANOVA and regression analysis were used to analyse the relationship between socio-demographic variables and pro-environmental behaviour. The results show that age and the number of children a person has are positively associated with pro-environmental behaviour. In addition, women and members of civic organisations tend to have higher levels of pro-environmental behaviour. Using these significant socio-demographic variables in green segmentation and in developing complex models of pro-environmental behaviour is therefore recommended
Abusive Supervision as a Trigger for Resentment: Do Envy and Psychological Contract Violation Matter?
Get PDFThis study examines the direct and indirect effects of abusive supervision on resentment, psychological contract violation, and envy and investigates the importance and performance of the three antecedent variables on resentment. The research is quantitative, explanatory, and cross-sectional. The sample was non-probabilistic and comprised employees of the Mexican export manufacturing industry. A PLS structural equation model and an importance-performance map were used. It was identified that abusive supervision generates envy and psychological contract violation and indirectly leads to resentment through these variables. The importance-performance map showed that envy is the variable that most leads to resentment, and given its effect on performance, opportunities for improvement were identified
#mindentgyűjtünk – A Bibliotheca Hungarica és a Szlovákiai Magyar Adatbank
No full textThe article is an expanded version of a presentation given on September 18, 2023 in Kassa at the conference titled "In the same boat - professional day of the Association of Hungarian Librarians in Slovakia". The study presents the special library of the Forum Minority Research Institute, the Bibliotheca Hungarica. The collection of the special library consists of fiction and non-fiction works published in Hungarian language from 1918 to the present day in the territory of Czechoslovakia and later Slovakia, as well as publications in Hungarian and other languages relating to the history, culture, social and political life of the Hungarians and minorities in Slovakia. The article places great emphasis on the presentation of the work taking place in the special library, on the characterization of the contents accessible by remote access, and on the description of the ways of keeping contact with researchers and partners. The author emphasizes that the collection of the cultural heritage of the Hungarians in Slovakia is not only a matter for the library, but also a common matter for the Hungarian community in Slovakia.Az előadás az Egy hajóban – a Szlovákiai Magyar Könyvtárosok Egyesületének szakmai napján hangzott el 2023. szeptember 18-án, Kassán. A tizenöt perces prezentáció a Fórum Kisebbségkutató Intézet szakkönyvtárának, a Bibliotheca Hungaricának a bemutatásáról, illetve az intézet által működtetett Szlovákiai Magyar Adatbank tartalmairól, újdonságairól szólt, kiemelve a könyvtárosok munkáját. Az írásbeli forma lehetőséget ad az előadás egyes részeinek a kibővítésére, részletezésére
Tudomány: válaszok a globális kihívásokra – a Valóságos könyvtár – könyvtári valóság VI. konferencia előadásai
No full textThe Institute of Library and Information Science (KITI) and the Doctoral Programme in Library Science of the Faculty of Humanities of Eötvös Loránd University (ELTE BTK) organised for the sixth time the two-day conference entitled Real Library – Library Reality on 28 and 29 November 2023 as part of the Hungarian Science Festival series of events launched by the Hungarian Academy of Sciences.The motto of the Hungarian Science Day 2023 is "Science: responding to global challenges", and the conference's main theme was "Library and market economy".Az Eötvös Loránd Tudományegyetem Bölcsészettudományi Karának (ELTE BTK) Könyvtár- és Információtudományi Intézete (KITI), valamint Könyvtártudományi doktori programja hatodik alkalommal szervezte meg a Magyar Tudományos Akadémia által indított Magyar Tudomány Ünnepe rendezvénysorozat részeként a Valóságos könyvtár – könyvtári valóság című kétnapos konferenciáját 2023. november 28-án és 29-én.A Magyar Tudomány Ünnepe 2023 mottója a „Tudomány: válaszok a globális kihívásokra”, a konferencia kiemelt témája a könyvtár és piacgazdaság volt
A bécsi Magyar Történetkutató Intézet ki nem adott 1947. évi évkönyvének története
No full text“… the question is whether a people's democracy moving towards socialism should publish any idealistic historical studies based on conscientious archival research at public expense”
The Hungarian government renewed the system of cultural relations abroad in the period following the First World War and the Trianon Dictate. As a result, it established several institutions abroad and restructured those already in operation. In the early 1920s, Hungarian scientific activities (archival publications, scholarship research, cultural and scientific dissemination) were launched in Vienna, the capital of independent Austria, by two Hungarian institutes. During the years of the Second World War, the publication of the yearbooks ceased. It was not until 1948 that they could be republished, and the Institute began editing them and preparing for the publication of the studies. In the meantime, however, the political atmosphere in Hungary had changed: the Communist Party had taken power and began to redefine history from a distorted point of view, and also to fight against the religious. All this did not favour the publication of this yearbook. Publication and printing were halted for political and professional reasons, regardless of the considerable up-front financial costs. In the end, the studies written were filed in the Ministry's archives and have remained mostly unpublished to this day.Mottó
„… kérdés, hogy a szocializmus felé haladó népi demokrácia állami költségen kiadjon-e bármilyen lelkiismeretes levéltári kutatásokon alapuló idealista történeti tanulmányt”
A magyar kormányzat az első világháború, és a trianoni diktátum utáni időszakban megújította a külföldi kulturális kapcsolatok rendszerét. Ennek eredményeképpen több intézetet alapított külföldön, illetve átalakította a korábban már működőket. A függetlenné vált Ausztria fővárosában, Bécsben, az 1920-as évek elején indult meg a magyar tudományos tevékenység (levéltári forráskiadás, ösztöndíjas kutatómunka, kulturális és tudományos értékközvetítés) két magyar intézet szervezésében. 1931 és 1940 között tíz évkönyvet jelentettek meg, és egy, Fontesnak nevezett forráskiadvány-sorozat szerkesztését is elvégezték. A második világháború évei alatt az évkönyvek kiadása szünetelt. Az évkönyvek újrakiadására csak 1948-ban nyílt volna lehetőség, és az Intézet meg is kezdte a szerkesztést, a tanulmányok kiadásának előkészítését. Azonban közben Magyarországon megváltozott a politikai légkör: a hatalmat a kommunista párt szerezte meg, és megkezdte a történelem eltorzult szempontú újraértékelését, és emellett egyházellenes harcot is folytatott. Mindez nem kedvezett a jelzett évkönyv kiadásának. A megjelentetést és a nyomdai előkészítést politikai és szakmai okokra hivatkozva leállították, nem törődve a jelentős előzetes pénzbeli költségekkel. Végül a megírt tanulmányok a minisztérium irattárába kerültek, többnyire máig kiadatlanul
Mechanical Studies of Subperiosteal Implants
Get PDFWhen designing subperiosteal implants, mechanical testing of the implant and abutment is inevitable. Subperiosteal implants and their abutments are medical devices made to order, so each implant requires a separate design, since each patient has a different bone surface, for which the implant must be designed. For the mechanical testing of subperiosteal implants, a new test apparatus was constructed, on which mechanical simulations were carried out, the subperiosteal implants were tested together with their abutments. In addition to the finite element analysis simulation, the test apparatus can also be used to determine how much force is generated by the chewing force on the subperiosteal implant and its abutment as a result of the chewing mechanism
Optimal Design of Shear Walls for Minimizing the Structural Torsion Using Cascade Optimization Algorithm
Get PDFDue to a large number of design variables involved in the optimization of RC structures, a multi stage cascade optimization is used. This algorithm speeds up an accurate optimal design for the large-scale structures reducing the number of variables by dividing single optimization to a number of stages such that the optimization of each stage starts with the optimum results of the previous one. Here, the first stage of cascade optimization method uses the assembling of the stiffness matrix of the entire RC structure for minimizing the torsion of the stories as an objective function. By assembling the stiffness matrix of the RC frame without shear walls and the shear wall alone, the length and thickness of the shear wall on each story are taken as design variables of the first stage. The optimized reinforcement arrangement of walls according to the required wall rebar area is the goal of the next stage. Using this method, designing the RC structure and minimizing the structural torsion of each floor simultaneously, can result in different length and thickness for the shear walls in different stories. Reducing the structural torsion leads to economical structure. Here, the MATLAB and ETABS interfacing are utilized
Friction Stir Welding of Laser-powder Bed Fusion Manufactured A20X
Get PDFThis study investigates butt friction stir welding of 4 mm thick A20X plates, which were produced using additive manufacturing through laser-powder bed fusion. The plates were joined at varying process parameters, including different welding and rotational speeds. Both the microstructure and the mechanical strength of the joints were examined, comparing joints in both as-printed and as-welded conditions.The joints welded at a welding speed of 100 mm/min and a rotational speed of 1500 rpm exhibited superior mechanical properties compared to those produced with other parameter settings. The results show that decreasing the rotational speed while increasing the welding speed leads to the formation of tunnel defects, compromising joint integrity and resulting in lower ultimate tensile strength. In contrast, the combination of 100 mm/min welding speed and 1500 rpm rotational speed produced defect-free joints, with an average ultimate tensile strength of 335 MPa and an elongation at fracture of 8.5%