bluuebunny/crossref_metadata_2025_split huggingface dataset:
Failure of the tail rotor of the Mi-24 helicopter as a result of a long-term impact of spatial resonance coupling
Authors: Kowalczyk Henryk , Gębura Andrzej , Tokarski Tomasz , Kwiatkowski Tadeusz 
Published: January 2022

Abstract
The most important element that has an impact on the safety of flight includes the helicopter power plant and the transmission shaft assembly. Monitoring with the use of the traditional vibroacoustic techniques does not provide satisfactory results. It is especially difficult to detect spatial resonance couplings, which may result in dangerous and rapid breaking of elements. This article focuses on a specific mechanism for formation and deepening of resonance and effects of resonance couplings of two subassemblies. For their monitoring, the FAM-C method was applied. It uses an on-board generator as a sensor. This is a synchronous method, which enables one to detect the onset of spatial resonance.
Using the Telemetry System as an Element of the Engine Operation Monitoring System of UAS
Authors: Buczkowska-Murawska Teresa , Żokowski Mariusz 
Published: January 2022

Abstract
The article presents an engineering approach that allows us to collect engine operation characteristics using built-in telemetry mechanisms, filled with the passive recording system. As a result of the development of the solution, the characteristics of the engine operation were obtained under real conditions, and the universal registration tool was built with a wider application than simply the registration of the engine operating parameters. The development of the solution allowed measurements to be obtained in a passive mode using a distributed architecture for engine monitoring and engine operation characteristics, which would be difficult to obtain and archive without logger production, especially during flight tests.
The Use of Innovative Contact Strip for Pantographs of Electric Rolling Stock. Experience in Operational and Bench Tests
Authors: Mukha Andrii , Ustymenko Dmytro , Diab Al Said Ahmad Mohammad , Kuznetsov Valeriy , Skrzyniarz Marek , Szulc Waldemar 
Published: January 2022

Abstract
Modern high-tech composite materials are widely used in various sectors of the economy, in particular, in railway transport. Among the areas of application of such innovative materials, the manufacturing of contact strips for pantographs of electric rolling stock should be mentioned. Innovation is primarily understood as the self-lubricating property of the working surface of the linings. The linings made of such materials differ from the traditional graphite (coal) ones by the increased content of metal additives, in particular copper, which limits the possibility of their use on electric rolling stock in the countries of the European Union. Regulatory restrictions on the content of copper (35% and 40%) are associated with possible damage to the contact wire, in the case of using overlays with a content of copper (metals) greater than these restrictions. On the railways of Ukraine (countries of the former USSR), there are also restrictions on the use of linings of different types according to the degree of wear of the contact wire, no more than 40 microns is allowed per 10 thousand passes of the locomotive pantograph along the contact wire. These standards are verified during operational and bench tests. The aim of the article is to present the types of tests and compare the obtained values with similar indicators in the case of using a traditional contact strip for pantographs of electric rolling stock. The results obtained confirm the possibility of using innovative linings on iron networks, since the wear of the contact wire during testing is much lower than that of the normative and knife than for traditional types of linings. In addition, during a set of tests, the fact of improving the quality of the working surface of the contact wire was established, which positively affects the extension of the service life of the contact wire.
Electric Aircraft Propulsion
Authors: Kozakiewicz Adam , Grzegorczyk Tomasz 
Published: January 2022

Abstract
This paper presents the state of the art in electric aircraft propulsion systems. The necessary reduction of greenhouse gas emissions on the global scale forces aviation engineers to search for ‘green’ solutions. Electric aircraft propulsion is a potential and relatively intuitive choice for a reduction of emissions in flight operations. This paper showcases four architectures of aircraft propulsion systems being now considered to utilise the advantages of electric propulsion with commercially profitable operating range and payload capabilities. One of the largest technological obstacles to the widespread use of electric propulsion in aviation is the low energy density of modern electric batteries. This paper presents the types of power supply which may achieve an energy density above the minimum threshold of 500 Wh/kg, and alternative onboard electrical power sources. The paper also shows novel designs of electric motors intended for aerospace applications. The final sections of this paper shows the implemented projects of aircraft with electric propulsion and the electric aircraft propulsion research projects underway around the world.
The Synthesis of Gemini Ionic Salt in the Form of a (Tetra)Fluoborate of 1,4-Bis- ((1-Decyloimidazol-3-Yl)Methyl)Benzene
Authors: Turlej Anna , Skolniak Marta , Nowosielski Jacek 
Published: January 2022

Abstract
Ionic liquids as anticorrosion agents have a wide spectrum of unique properties, which make them less harmful than the majority of typical organic corrosion inhibitors in antifreeze. The synthesis of ionic liquids enables them to be provided with the desired physicochemical and thermodynamical properties by the appropriate selection of cations, anions, and alkyl substituents on the cations. The aim of this paper is the synthesis of the gemini ionic salt (ionic liquid) made up of two imidazole rings with a linear alkyl substituent with 10 carbon atoms, bonded by a 1,4-dimethylphenyl moiety. Such compounds are studied in view of steel protection against oxidizing and corrosive effects. The compound was obtained in a satisfactory yield.
Diagnostics of the Excessive Wear of the Machine on a Model of Developmental, Progressive Interactions Between Diagnostic Signals and Rotation Speed Signals
Authors: Lindstedt Paweł , Rokicki Edward , Deliś Maciej , Dobosz Kamila , Czarnecki Andrzej 
Published: January 2022

Abstract
In the machine operating process, there are certain interactions between its operational use and wear. The current wear is increased by the current intensity of operational use, and usable potential is reduced by the current wear rate. In the diagnostic inference process, static characteristics and trajectories of state from the experiment are compared with different matrices determined for various assumed configurations of changes. As a result, the approximated diagnosis is created. This method is not universal. It applies only to the continuous progressive state, more or less increased wear rate of the machine.
Transformation of the morphometry of Lake Osieckie – largest lake in the Holy Cross region
Authors: Choiński Adam , Zieliński Artur 
Published: January 2022

Abstract
The paper presents the analysis of the transformation of Lake Osieckie, the largest lake in the Holy Cross region until 2016. It is a valley lake that according to cartographic materials had undergone no changes in the shoreline since ca. 1938. The nearby activity of a sulphur mine required building three dikes on the lake, dividing it into four independent water bodies. The paper presents the analysis of their morphometric properties in comparison to those of the original lake. Although the basins of the new lakes are of natural origin, the currently existing four lakes can be described as quasi-natural.
Ludwik Wołowski and His Contribution to the French Credit Revolution of the 19th Century
Authors: Dobek Rafał 
Published: January 2022

Abstract
Ludwik Wołowski was a Polish November emigrant in France. There, he gained recognition as an outstanding economist, banker and republican politician. The article focuses on the issue of mortgage loan, which is extremely important for Wołowski. It presents both the theoretical concepts of the Pole from 1834, his political activity in the years 1848–1851 aimed at changing the provisions of the mortgage law in France, and finally the moment of co-creation by Wołowski Crédit Foncier, the first modern mortgage bank in France, and the further history of the bank managed by Wołowski, in the board of which he sat until his death in 1876. In the first part, the text presents not only the criticism of the French mortgage system by Wołowski (primarily the so-called secret mortgages), but also his draft changes and the loan and mortgage model proposed by him and the companies that may grant it. In the second, it shows the parliamentary activity of Wołowski, an attempt to force through appropriate changes in the banking law and the reasons for its defeat. In the third, the most extensive, the article describes not only the very moment of establishing Crédit Foncier and the two-year period of management by Wołowski, but also the further, controversial operation of the bank until the second half of the 1870s. All this against the backdrop of the changing French Monarchy of July, the Second Republic and the Second Empire.
Expectations of a Post-Wwii Depression
Authors: Thies Clifford F. 
Published: January 2022

AbstractThe forecast of a Post-WWII depression is contrasted against the vigorous growth that actually happened. Economists called for continued control over the economy to prevent the feared depression. But, in spite of the warning, returning soldiers were rapidly demobilized and the economy decontrolled. While economists dismissed indications toward the end of the war of pent-up demand as unsustainable, pent-up demand played an important role in the smooth transition from a wartime to a peacetime economy. Indicators of pent-up demand included buying plans and the accumulation of liquid assets. This study tracks expectations of a post-war depression of the general public, business and economists during this period. It shows that, in 1947, all three groups expected a recession, if not a depression. Yet, no such thing occurred. In the case of the general public, a time series of expectations is extracted from heterogeneous survey data.
‘Kapitalisten’ and ‘Prywaciarze’. A Comparison of Nationalisation Campaigns in the GDR and Poland
Authors: Flade Falk , Kamosiński Sławomir 
Published: January 2022

Abstract
This paper compares nationalisation campaigns in the German Democratic Republic and socialist Poland, with particular focus on industry. It is based on secondary literature as well as material from both the German and Polish statistical offices. The main finding is a surprising lack of simultaneity in the nationalisation campaigns in the two countries, which possibly had a significant impact on the course of economic transformation in East Germany and in Poland.
Development of Transport as a Factor of the Economic Miracle (Wirtschaftswunder) of West Germany
Authors: Myszczyszyn Janusz 
Published: January 2022

Abstract
The post-war economic policy of West Germany (FRG) is largely associated with the so-called economic miracle (German: Wirtschaftswunder) and therefore its causes are the subject of many different analyzes. They include the correlation between the rate of economic growth in Germany and the development and transport potential of transport, including rail and road-car transport. This position prompted the author to try to search for long-term interdependencies and thus verify the thesis using the analysis of time series (1950–1989) available for West Germany and using original econometric methods in this field, e.g. unit root test to determine the stationarity and the Engle-Granger cointegration test.
In addition to the introduction, the article consists of three parts and conclusions. The broadest one includes the description of the assumptions and stages of the research procedure and its results, both on the empirical and methodological level. It is based on synthetic theoretical foundations presented on the basis of a review of international literature on the subject and review of the essence of the German economic miracle and the main trends in changes in the field of economic growth and transport development in Germany after World War II. The research presented in this way fits into the principles of the new economic history paradigm, which is still not very popular in Europe.
No Chance of Success. State Agrarian Real Estate 1946–1949. A Contribution to the Research on the History of the State Agricultural Sector in Poland
Authors: Machałek Małgorzata 
Published: January 2022

Abstract
The years of activity of the PNZ (Państwowe Nieruchomości Ziemskie – State Agrarian Real Estate) fell into the period of post-war agricultural reconstruction and management of Recovered Territories. Initially, their main task was to prepare for the parceling out of large landed estates, which was important for the settlement campaign. The target task was to run specialized farms that would supply the entire agriculture with seed and breeding material. After the escape of S. Mikołajczyk, the communists changed the priorities of PNZ activity, which from then on were to deal with large-scale production, and above all, manage about 1,200 hectares of agricultural land. The vast majority of the area used by PNZ was located in the western and northern regions of the country. The best conditions existed in those areas for establishing a state sector in agriculture. In spite of many achievements, PNZ was liquidated because the communists wanted to get rid of the prewar staff of specialists, mostly landowners, from the enterprise. This decision was political in nature. State farms were then created to replace PNZ.
Teknik Permainan Beatbox Flute Dalam Box Karya Christopher Kuhns
Authors: Said Arini Nur , Limbong Helena Evelin 
Published: January 2022

The composition of solo flute created by Christopher Kuhns entitled ‘BOX’ is interesting because it uses beatbox tecnique in playing the flute. beatbox technique in flute is not a new technique for flute, Greg Pattillo is one of the flutist has introduced this technique in 2009. This research aims to describe the beatbox flute technique used in Box coposition and how to produce beatbox technique through articulation and tonguing in flute. The method used by researcher is a qualitative descriptive research methode with a analysis approach. The data obtained though literature studies, music score of Box, collecting audio-visual documentation in the form of performing Box composition through the internet and interview with Christopher Kuhns, Greg Pattillo, and Willem Carolus Cristopherson Tamnge. The result of this research show that the flute not only can produce melodic sounds, but also can produce percussive sounds with many sound colors. Beatbox technique was imitating percussion sound such as; bass drum, hi-hat, and snare. In Box Composition, there are seven beatbox articulation techniques, such as classic kick, closed k hi-hat, closed t hi-hat, meshed snare, open t hi-hat, shaker, and classic inward snare. The flute articulation techniques are accent, legato, staccato, and slur, also tonguing techniques used in Box composition are single tonguing and double tonguing. The application of articulation and tonguing influence each other in beatbox flute palying to produce clear melody and rhythm.
A política educacional de formação de Policiais Militares
Authors: Oliveira Sandra Schons Lemos de , Jacondino Eduardo Nunes 
Published: January 2022

O aumento da violência e da criminalidade no Brasil ocasionaram discussões sobre a educação policial, que culminaram no projeto nacional de Segurança Pública, instituído pela lei Nº 13.675 de 2018. O estudo analisa os saberes presentes na educação policial militar e o tipo de formação policial militar que é legitimada pela Lei nº 13.675 de 2018. No estudo utilizou-se a abordagem qualitativa, por meio de pesquisa bibliográfica e documental. Os dados foram tratados pela análise de conteúdo. Constata-se uma demanda crescente de redemocratização e reformulação dos processos formativos de Policiais Militares, trazidas nas últimas décadas e reforçada pela nova política nacional de segurança pública. A lei orienta a formação dos profissionais de segurança pública para atuarem de forma preventiva, a fim de superar o modelo de polícia tradicional repressivo, que demonstra ser ineficiente no combate à criminalidade e à violência.
Keefektifan Strategi Pembelajaran Problem Based Learning Terhadap Hasil Belajar Matematika Siswa
Authors: Rahma Rahma , Angriani Andi Dian , Nur Fitriani , Suharti Suharti , Tahir M. Yusuf 
Published: January 2022

Abstract
This study discusses the problem of the effectiveness of Problem Based Learning (PBL) on students’ mathematics learning outcomes to see the differences in learning outcomes of those who learn and without applying the model of Problem Based Learning (PBL). This research is a quasi-experiment, the nonequivalent pretest-posttest control group design. The population is all class VIII students at MTs Madani Alauddin with a sample of class VIIIA (so the experimental class) and also class VIIIB (so the control class). The instrument applied was an essay test which was then analyzed descriptively as well as inferential. The results of the descriptive posttest calculation showed that student learning outcomes with the PBL model were higher than those who did not apply PBL. Inferential statistical analysis shows that there is a fairly strict difference between learning and the PBL model and not. In this study, using the PBL model can help students develop their knowledge and understand mathematical problems related to everyday life.Keywords: Learning Outcomes, Learning Model, Problem Based Learning

Abstrak
Penelitian ini membahas terkait efektifnya model problem based learning (PBL) terhadap hasil belajar matematika siswa dengan maksud melihat perbedaan antara hasil belajar siswa yang belajar dengan model pembelajaran PBL dan siswa yang belajar tanpa menggunakan PBL. Penelitian ini termasuk dalam jenis quasi experiment, dengan desain penelitian berupa the nonequivalent pretest-posttest control group design. Populasi dalam penelitian ini ialah semua siswa kelas VIII di MTs Madani Alauddin dengan sampel kelas VIIIA sebagai kelas eksperimen dan kelas VIIIB sebagai kelas kontrol. Instrumen yang digunakan ialah test bentuk essay yang kemudian dianalisis secara deskriptif dan juga inferensial. Dari hasil perhitungan posttest secara deskriptif, dapat disimpulkan bahwa hasil belajar siswa dengan mengaplikasikan model PBL lebih tinggi dari hasil belajar yang tidak mengaplikasikan PBL. Analisis statistik inferensial menunjukkan bahwa ada perbedaan yang cukup ketat antara pembelajaran dengan mengaplikasikan model PBL dan yang tidak mengaplikasikan PBL. Hasil penelitian ini juga menemukan bahwa pembelajaran menggunakan model PBL dapat membantu siswa mengembangkan pengetahuannya serta memahami masalah-masalah matematika yang berkaitan dengan kehidupan sehari-hari.
Kata Kunci: Hasil Belajar, Model Pembelajaran, Problem Based Learning
PLATÃO. O Banquete. Texto estabelecido e anotado por John Burnet. Tradução e notas de Irley F. Franco & JAA Torrano. Apresentação de Irley F. Franco. Rio de Janeiro; São Paulo: Editora PUC-Rio; Edições Loyola, 2021.
Authors: Rachid Rodolfo José Rocha 
Published: January 2022

Resenha de PLATÃO. O Banquete. Texto estabelecido e anotado por John Burnet. Tradução e notas de Irley F. Franco JAA Torrano. Apresentação de Irley F. Franco. Rio de Janeiro; São Paulo: Editora PUC-Rio; Edições Loyola, 2021. 212 pp. ISBN (PUC-Rio): 978-65-88831-23-6. ISBN (Edições Loyola): 978-65-5504-091-3.
PLATÃO. Teeteto. Texto estabelecido e anotado por John Burnet. Tradução, apresentação e notas de Maura Iglésias & Fernando Rodrigues. Rio de Janeiro; São Paulo: Editora PUC-Rio; Edições Loyola, 2020.
Authors: Rachid Rodolfo José Rocha 
Published: January 2022

Resneha de PLATÃO. Teeteto. Texto estabelecido e anotado por John Burnet. Tradução, apresentação e notas de Maura Iglésias Fernando Rodrigues. Rio de Janeiro; São Paulo: Editora PUC-Rio; Edições Loyola, 2020. 264 pp. ISBN (PUC-Rio): 978-65-991801-0-1. ISBN (Edições Loyola): 978-65-5504-040-1.
Author Response to “Concerns About the Methodology and Data Collection in a Systematic Review”
Authors: Saueressig Tobias , Diemer Frank , Zebisch Jochen , Owen Patrick J. , Belavy Daniel L. 
Published: January 2022

Author response to the JOSPT Letter to the Editor-in-Chief “Concerns About the Methodology and Data Collection in a Systematic Review”. J Orthop Sports Phys Ther 2022;52(1):50–51. doi:10.2519/jospt.2022.0201-R
Demystifying Qualitative Research for Musculoskeletal Practitioners Part 4: A Qualitative Researcher's Toolkit—Sampling, Data Collection Methods, and Data Analysis
Authors: Klem Nardia-Rose , Shields Nora , Smith Anne , Bunzli Samantha 
Published: January 2022

Synopsis In this editorial, we discuss common methods used in musculoskeletal qualitative research, including approaches to sampling, data collection, and data analysis. We take a particular focus in this editorial on methods that involve “speaking to people.” We highlight the back-and-forth or cyclic nature of qualitative research, and introduce readers to the use of natural language processing to analyze qualitative data. J Orthop Sports Phys Ther 2022;52(1):8–10. doi:10.2519/jospt.2022.10486
Developing Clinical and Research Priorities for Pain and Psychological Features in People With Patellofemoral Pain: An International Consensus Process With Health Care Professionals
Authors: Vicenzino Bill T. , Rathleff Michael Skovdal , Holden Sinead , Maclachlan Liam , Smith Benjamin E. , de Oliveira Silva Danilo , van Middelkoop Marienke 
Published: January 2022

Objective To decide clinical and research priorities on pain features and psychological factors in persons with patellofemoral pain. Design Consensus development process. Methods We undertook a 3-stage process consisting of (1) updating 2 systematic reviews on quantitative sensory testing of pain features and psychological factors in patellofemoral pain, (2) an online survey of health care professionals and persons with patellofemoral pain, and (3) a consensus meeting with expert health care professionals. Participants responded that they agreed, disagreed, or were unsure that a pain feature or psychological factor was important in clinical practice or as a research priority. Greater than 70% participant agreement was required for an item to be considered important in clinical practice or a research priority. Results Thirty-five health care professionals completed the survey, 20 of whom attended the consensus meeting. Thirty persons with patellofemoral pain also completed the survey. The review identified 5 pain features and 9 psychological factors—none reached 70% agreement in the patient survey, so all were considered at the meeting. After the meeting, pain catastrophizing, fear-avoidance beliefs, and pain self-efficacy were the only factors considered clinically important. All but the thermal pain tests and 3 psychological factors were considered research priorities. Conclusion Pain catastrophizing, pain self-efficacy, and fear-avoidance beliefs were factors considered important in treatment planning, clinical examination, and prognostication. Quantitative sensory tests for pain were not regarded as clinically important but were deemed to be research priorities, as were most psychological factors. J Orthop Sports Phys Ther 2022;52(1):29–39. doi:10.2519/jospt.2022.10647