bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Investigation of Endplates Influence on the Wing in Ground Effect Lift Force
Authors: Rojewski Adam , Bartoszewicz Jarosław 
Published: June 2020

Abstract
The article presents a comparison of the wing in ground effect magnitude of conceptual WIG craft model main characteristics for a wing with and without endplates which are also known as winglets in regular aircraft. In article, the author describes WIG effect with and WIG craft, which operates on low altitude, smaller than the length of wing chord, mostly above the water reservoir. WIG effect phenomenon is simple. The first aircraft needs to fly at adequate altitude, with a smaller distance between lower airfoil surface and ground static pressure rises, leading to rising of lift force. The main advantage of the wing in ground effect craft on regular aircraft is a much higher lift to drag ratio, also this phenomenon provides to drop in specific fuel consumption of aircraft and allows flying with heavier cargo due to higher lift force. Characteristics present in the article were designated from simulations, which were conducted in Ansys Fluent software. Results obtained for a wing with endplate in numerical analysis shows the superiority of this approach. Endplates provide to increase WIG effect by a decrease in induced drag through the move out vertices from the wing tips, which are made by differential pressure above and under the wing. As winglets in regular aircraft, endplates provide to save fuel. WIG craft does not need airports so it could be a cheap alternative for modern aircraft.
Analysis of the Vehicle Exploitation Process with Regard to Profiling
Authors: Siergiejczyk Mirosław , Rosiński Adam 
Published: June 2020

Abstract
Transport telematics systems integrate information technology with telecommunications for their use in various transport systems. Thanks to the use of advanced technical solutions and modern telecommunications and IT systems, it is possible to implement additional innovative services. They can be used to rationalize the process of using and maintaining means of transport. Modern vehicles are equipped with telematic on-board systems. Such solutions combine various electronic devices used in the vehicle. For this purpose, bus solutions are used, thanks to which it is possible to control individual systems and devices. It is also possible to use the transmitted data to detect negative exploitation phenomena during vehicle use (e.g. glazing phenomenon, work in the upper engine rev range with too low coolant temperature, intensive work compressor of the high air pressure system being a symptom of inability of pneumatic systems). This is possible because the data being sent has a specific information resource. Thanks to this, to can be concluded about the loss of the exploitation potential of the vehicle. This approach will be used to rationalize the technical service of the vehicle fleet, with regard to profiling. Using exploitation data, received via a telematic interface from vehicles, it is possible to profile the rolling stock. It consists in distinguishing individual sets of vehicles due to certain reliability and exploitation properties. This approach allows for the specification of the rolling stock exploitation, giving the opportunity to rationalize the use and exploitation. The publication presents the author’s graph of the exploitation process taking into account the profiling of the vehicle fleet. The application of the presented approach will contribute to the improvement of the value of certain vehicle reliability and exploitation indicators.
Anomaly of Rotor Dynamics in Ultra-Light Helicopter – Robinson R22
Authors: Sobieszek Agnieszka 
Published: June 2020

Abstract
The article presents the analysis of anomaly of rotor dynamics in ultra-light helicopter - Robinson R22. Robinson R22 is two-seat, two-blade main rotor and single-engine helicopter, well known as simple and common used aircraft because of low price and high availability. At the same time, large number of accidents and strictly defined rules (recommended piloting technique) and weather condition for safe flight show disadvantages of Robinson R22. The reason for considering this topic is the analysis of different flight properties and helicopter behaviour as well as easy entering into dangerous flight manoeuvre. In the article different flight properties and loss of control during the pull-up, manoeuvre or vertical gusts of wind and mast bumping accidents were analysed. Analysis shows that problem may be caused by construction of three-hinged rotor hub, designed and patented by F. Robinson. Article presents model of rotor hub and review of main rotor and rotor hub construction in light helicopters. Because of number of accidents, caused by the unusual behaviour of Robinson R22, restrictive pilotage rules were introduced: prohibition of flight in certain weather conditions, the necessity of attending additional training conducted by trained instructors. To reduce the probability of an accident a special instruction for specific Robinson R22 properties was created. Moreover, the statistics of accidents resulting from loss of control and review of legal changes caused by Robinson R22 accidents are presented.
Introduction to the Examination of Thin-Walled Structures Using the Vibrodiagnostic Method
Authors: Szeleziński Adam , Muc Adam , Murawski Lech , Van Doan Do 
Published: June 2020

Abstract
The article presents a methodology of non-destructive diagnostic vibratory tests of welded plates with geometrical parameters that classify them into a group of thin-walled panels. On the basis of such plates, most ship constructions are created. In previous works, the authors dealt with the study of welded joints in plates with significant thicknesses and developed for them a number of methods for assessing the quality of welded joints. Vibrodiagnostics is a NDT method that allows the use of a variety of techniques and tools. It enables measurements to be made in both a contact and non-contact way depending on the requirements of the structure and the environment. Vibrodiagnostic method is one of the most modern NDT methods, which uses modern measurement tools and computer analysis of data. On the basis of the developed methods, the authors intend to verify their application to plates from real welded constructions, which will be performed in typical shipyard conditions by welders. Such tests are important due to their use for the construction of a real SHM ship construction monitoring system. These methods allow for the examination of the condition of ships’ structural plates and can detect defects in welded joints that prevent ships from operating under severe sea conditions. The article presents the laboratory stand, the sensor layout, results, and their initial analysis.
Numerical Investigations of Stress Concentration in Reinforcement Steel Structure by Composite Overlays
Authors: Szybiński Bogdan , Wygoda Mateusz 
Published: June 2020

Abstract
The stress concentration observed in the vicinity of cut-outs and holes in structural elements significantly influences the fatigue endurance of machines subjected to cyclic loads. Numerous studies have been made so far to improve this situation and increase the structure lifetime. Several design recommendations have also been worked out to avoid the problem of premature failure. The proposed article illustrates the influence of the composite overlays applied around the cut-outs made in flat steel constructional elements subjected to axial tension. The detailed study concerns the reinforcement made from the FRP (fibre reinforcement polymer) composite applied around the notches. Two types of composite materials were used, namely: TVR 380 M12/R-glass (glass fibres embedded in epoxy resin matrix) and AS4D/9310 (carbon fibres embedded in epoxy resin matrix). In the first step, the detailed numerical studies (finite element analysis) were performed for the steel samples (with no overlays added) with cut-outs made in the form of circle, square and triangle hole (the last two with rounded corners). The results of these studies were compared with the existing analytical solutions with respect to the stress concentration factors (SCF) estimation. The relatively good conformity was observed when using dense meshes of finite elements placed around the void vicinity. In the next step, the composite overlays were applied around cut-outs and their influence on the stress concentration was investigated. The influence of the fibre orientation, numbers of layers, sizes of the composite overlay used were considered. It was proved that the application of composite overlays evidently decreases the stress concentration around the notches.
Analysis of Possibility of Repairing Welding of Selected of the Steam Turbines
Authors: Wieczorska Agata , Bujko Adrian 
Published: June 2020

Abstract
The article presents the results of the study on the possibilities of repair by welding methods of exploitation steam turbine bodies. Two hull were investigation after a lifetime of more than 200.000 hours. Repair welding study were carried out on the L17HMF cast steel body in the immediately after exploitation condition, whereas the L21HMF cast steel body underwent a revitalization after the exploitation, and then the welding repair research were performed. On the material taken from the L17HMF cast steel hull, welding repairs were made by welding the previously cut four grooves measuring 200 mm 50 mm 50 mm, which were simulations of material defected. All samples were made in areas where maximum steam temperatures were operating. Welds were tested with destructive and non-destructive methods to determine their quality and define non-compliances detected. The L21HMF cast steel was subjected to a revitalization process, which consisted the hull in subjecting heat treatment in order to obtain favourable structural changes and improve the strength properties. Non-destructive examinations and hardness tests were carried out on the remedial weld, indicating the required quality of repairing remedial weld. Comparative study is aimed at demonstrating the main welding problems during the repair welding of exploitation steam turbine hulls.
Operational Verification of a Ship Main Power System Element Choice – Case Study
Authors: Adamkiewicz Andrzej , Fydrych Janusz 
Published: June 2020

Abstract
The article refers to results and conclusions on post-emergency repairs of a turbo-charging system of a DEUTZ engine of the SBV 8M 628 type of 1715 kW – the main power unit of a cement carrier. The failure of the turbocharger led to severing of a part of the exhaust outlet valve head. In order to determine the cause of the turbocharger fault, parametric identification of the reference state of the turbocharging system interacting with the ship main power engine has been carried out. The post-emergency servicing of the turbocharger comprised mounting a new blade rim of expansive instruments of smaller capacity than the so far used. Control measurement results of the power system after the replacement of the turbocharger turbine nozzle have been presented. Limitations of correct engine operation have been noted in the range of maximum load with continuous power (MCR). A range of corrective maintenance servicing of fuel equipment has been presented. Using the values of measured torque at the propeller shaft, incorrect interaction between the shaft and the main engine has been noted. A new propeller, adequate to the design operational parameters of the engine characteristics, has been chosen and mounted. The correctness of turbine expansive instrument replacement has been verified by correct interaction between the elements of the power system: propeller – main engine – turbocharging system. Thus, a wider range of economically acceptable ship operation has been obtained.
Passion and researcher’s identity
Authors: Melosik Zbyszko 
Published: June 2020

Summary
The aim of the article is to analyse various contexts of passion perceived as an important component of researcher’s identity. First, passion is confronted with the concept if rationality which dominates the university thinking about research. Second, passion is considered in relations to intrinsic and extrinsic motivation. Next, the author concentrates attention on factors which limit the passion development: present commercialization of research as well as their permanent indexation and evaluation, re-locating the researcher’s energy on permanent reporting and detailed juridization of academic reality. At the end the possibility of passion in contemporary research is optimistically confirmed by the idea of academic community and academic freedom.
Macro-political determinants of school culture
Authors: Śliwerski Bogusław 
Published: June 2020

Summary
The subject of the article is the involvement of the school’s culture in the centralistic education policy, which is led by all, successively changing governments. It started with systemic reform of educational system in 1999. The author pays attention to the extent to which such a policy destroys the innovativeness of teachers. The only solution to this situation is the return to the anti-systemic micro-innovation movement in public education due to it restores the sense of dignity and professional self-fulfillment of teachers.
School culture in its descriptive and normative understanding. Selected exemplifications
Authors: Nowosad Inetta 
Published: June 2020

Summary
The article addresses the ambiguity in understanding school culture and its potential research implications. The analyses were embedded within two key approaches: normative and descriptive, illustrating selected exemplifications of theoretical positions of school culture in German-speaking countries. Also, the potential for integration of both approaches into a new model of school culture was proposed by La Tefy Schoen and Charles Teddi in 2008, which terminated the separation between descriptive and normative approaches to school culture.
Scholar in the spectacle of parametrization – between authenticity and game of appearances
Authors: Cybal-Michalska Agnieszka 
Published: June 2020

Summary
By referring to the metaphor of the theater – the theater of the reality of parametrization in which we the people of science participate – the author is wondering whether the servitude towards science can be identified with scientometrics, i.e., parametrization in the form that is known to us, where at least two of the indicators are subjective, namely: the type of the criteria and their weight. In the article, the emphasis is placed on the theatrical space of construction of the relation of “co-presence” which is not free from our need for recognition, individuality, uniqueness and being the best, at the top of the ranking of parametrization, “skillfully” playing our role of the “scientist” on the stage, which connects but also divides because of that, i.e. the place occupied on that stage. The acts are the spaces of our scientific activity, which – by capturing the “difference” in relation to others and the “difference” in relation to ourselves in time – allow us to be, to crystallize our image, to further define ourselves and to be recognizable in the role of a scientist in a reality that was not chosen by us, but is implemented according to codified rules of the game.
„New media” usage in the context of improving the quality of life of elderly from Poland
Authors: Zychowicz Maciej 
Published: June 2020

Summary
Subject of the report is media exclusion of elderly people in Poland, especially in area of Internet-connected activities as well as changes in social interaction model which are connected with development of the Internet. Nowadays we face with Internet revolution witch whom technological progress and web tools development allowed to partly virtualize interpersonal contacts and change the way people interact with others. Even in area of everyday life the Internet revolution allowed to modify our behaviors which were immutable from ages.The aim of this report is to assess the level of inclusion of the elderly people from Poland into area od virtual contacts and other activities as well as presenting their methods to use different media.
„Teachers as the Greatest Value of Our Nation” – Rhetoric, Practice and Effects of „reform” of Teacher Training in England and Wales
Authors: Potulicka Eugenia 
Published: June 2020

Summary
Initial teacher training in England and Wales is radically reformed since the 2010 year. Many new ways of training were introduced, namely: School-Centered Initial Teacher Training, School Direct, apprenticeship, Teach First, Troops to Teachers and others. The role of universities in teacher training is severe diminished with many implications for the quality of teachers and teaching as well as for the identity of academic teachers, their role and the lack of stability. Of course those changes have a lot of implications for universities, especially for their Schools of Education. Some of them disappeared.
Meaningful Learning: The Main Constitutive and Consecutive Components and their Presence in Science Teaching
Authors: Abu-Ghaneema Elias 
Published: June 2020

Summary
This pilot study aims to identify the presence of components which are consistent with meaningful learning in science teaching. Semi-structured interviews were conducted with six science teachers and the results show that some of the teachers’ perceptions and practices in science teaching are consistent with meaningful learning components. Science teachers’ descriptions led to the identification of six categories which can be classified into two sets of components: Constitutive (e.g., ‘authenticity’ and ‘prior knowledge’) and. Consecutive (e.g., ‘cooperative learning’, ‘knowledge construction’, ‘learning by doing’ and ‘feedback’). Based on these results, it can be concluded that there is a positive change in teachers’ perceptions and implementation of pedagogical processes for promoting meaningful learning in science teaching. The implications of these findings for future research are discussed.
After experiences in writing my master’s thesis in the eye of the work of my doctoral dissertation. The essay about my struggle with my research technique
Authors: Szafrański Mateusz 
Published: June 2020

Summary
This article presents experiences associated with writing my master’s thesis and designing research to my doctoral dissertation. In this text I indicate determinants that shape my research addescence is favourable to conducting reliable research projects. In both cases research sets in pedagogy of people with intellectual disabilities (oligophrenopedagogy) – a detailed science of special pedagogy that deals with an individual and social life of a person with intellectual disabilities.
Perceiving oneself as a human being and as a student by the junior high school pupils before beginning their secondary school education
Authors: Jaskulska Sylwia 
Published: June 2020

Summary
In the text, I presented a part of the results of the studies concerning the transition of the school youth from junior high school to high school. In the light of this results, I answered the question on how the students graduating from junior high schools in Poznań in 2015 perceived themselves as a person, especially in the role of a student. The image is generally positive, although it is varies among the students with different resources (e.g. grades, level of involvement).
Diversity and the Difficulty of Living it: The Case of Public Spaces in Skopje (North Macedonia)
Authors: Mojanchevska Katerina 
Published: June 2020

Abstract
Ethnic diversity and cultural heterogeneity are a reality for the city of Skopje, the capital of North Macedonia. The changing ethnic demography and redressed power-balance between majority and non-majority groups on local level have spurred a turbulent conflict – that of governance of diversity in public space. This paper aims to understand citizens’ views on how language, ethnicity, religion and collective cultural symbols are legitimised through the political, social and symbolic value of public spaces in their neighbourhoods. The results indicate that the political value of public spaces to stimulate contact, deliberation and debate among citizens on issues of their concern is undermined. Public spaces in Skopje are not planned and managed through a wide forum of citizen engagement. The colliding ethnonationalism and symbolic power struggle between the major ethnic groups result in co-ethnic preferences in socialisation and selection of public spaces. The concept of “the appropriate citizen” constructed through the symbolic meaning of public spaces perpetuates ethnonational rhetoric and supports expressions of citizenship that are limited to the nation-state and ethnic identification. In opposition to contact theory, this research indicates that self-segregation of ethnic groups can be prevalent in multi-ethnic neighbourhoods. This should make us think of the context where the contact is established and not only of the content of the interaction.
The Importance of Introducing a Merit-Based Hiring System in North Macedonian Governments
Authors: Hubbell Larry , Kreci Veli 
Published: June 2020

Abstract
In this article, the authors present several topics related to the nascent development of a merit-based hiring system in North Macedonia. This paper employs a normative approach. We advocate for a merit-based hiring system, similar to the American model. First, we explore the pressure exerted by the European Commission to adopt a merit-based system at all levels of government as a condition for entry into the European Union. Second, we delve into the patronage system in North Macedonia. Third, we provide a short history of patronage in the United States and the difficulty that nation had in curbing its entrenched patronage system. Fourth, we discuss the advantages of a merit-based hiring system, namely the creation of good governance, the improvement of employee morale, the development of more public confidence in government, the reduction of the influence of ethnic politics and the furtherance of the rule of law. Finally, we present an example drawn from the American federal government about the basic procedures of a merit-based hiring process.