bluuebunny/crossref_metadata_2025_split huggingface dataset:
Selected Aspects of Phonoscopic Examinations of Aircraft Records. Part II
Authors: Michalak Sławomir , Malanowicz Alicja , Prusik Tomasz , Paszek Sławomir , Rogala Krzysztof , Stępień Grzegorz , Chybowski Maciej 
Published: May 2020

Abstract
The article presents crucial aspects related to examinations of records from cockpit voice recorders (CVR) and the possible effects of the application of digital correction of these type of records. It also presents the resulting limitations concerning phonoscopic recognition examinations of speakers and determining the content of their utterances. A method for the real reduction of the described limitations was suggested. Part II of the article describes research experiments conducted at Air Force Institute of Technology.
Effect of fuel type on the combustion reaction behavior, phase structure and morphology of Ni0.5Co0.5Fe2O4 nanoparticles
Authors: Sedghi Arman , Salehkooh Elham Akbari , Chadorbafzade Monireh 
Published: May 2020

Abstract
Nickel-cobalt ferrite spinels are ferrimagnetic ceramic materials that possess a great potential for application in highdensity magnetic media, recording, color imaging, ferrofluids, and high-frequency devices. A change of their structure from micro- to nano- improves their properties drastically, therefore many methods have been investigated to fabricate nanopowder of these spinels. Gel combustion method is one of them. In this research, Ni0 5Co0 5Fe2O4 nanoparticles were fabricated via gel combustion method using metallic nitrates as an oxidant and citric acid, glycine and urea as fuels and the effects of fuel type on the reaction behavior, structure and morphology of Ni0 5Co0 5Fe2O4 nanoparticles were investigated. The reaction behavior was studied by thermal analysis method (TGA-DTA), crystallite size of powders was characterized by X-ray diffraction (XRD) and their morphology was studied by FE-SEM. The results revealed that the reaction was initiated in urea, glycine and citric at 219 °C, 197 °C, 212 °C, respectively. Samples fabricated from glycine and citric acid had a pure spinel structure but the others fabricated with urea fuel had iron oxide impurity. The crystallite size of nickel cobalt ferrite nanoparticles was in the range of 58 nm to 64 nm and the nanoparticles were agglomerated.
Synthesis and characterization of Li2MnO3 nanoparticles using sol-gel technique for lithium ion battery
Authors: Chennakrishnan Sandhiya , Thangamuthu Venkatachalam , Subramaniyam Akshaya , Venkatachalam Viknesh , Venugopal Manikandan , Marudhan Raju 
Published: May 2020

Abstract
Nanoparticles of Li2MnO3 were fabricated by sol-gel method using precursors of lithium acetate and manganese acetate, and citric acid as chelating agent in the stoichiometric ratio. TGA/DTA measurements of the sample in the regions of 30 °C to 176 °C, 176 °C to 422 °C and 422 °C to 462 °C were taken to identify the decomposition temperature and weight loss. The XRD analysis of the sample indicates that the synthesized material is monoclinic crystalline in nature and the calculated lattice parameters are 4.928 Å (a), 8.533 Å (b), and 9.604 Å (c). The surface morphology, particle size and elemental analysis of the samples were observed using SEM and EDAX techniques and the results confirmed the agglomeration of nanoparticles and, as expected, Li2MnO3 composition. Half cells of Li2MnO3 were assembled and tested at C/10 rate and the maximum capacity of 27 mAh/g was obtained. Charging and discharging processes that occurred at 3 V and 4 V were clearly observed from the cyclic voltammetric experiments. Stability of the electrodes was confirmed by the perfect reversibility of the anodic and cathodic peak positions observed in the cyclic voltammogram of the sample. The Li2MnO3 nanoparticles exhibit excellent properties and they are suitable for cathode materials in lithium ion batteries.
How Eurosceptic is Fidesz actually?
Authors: Hargitai Tibor 
Published: May 2020

Abstract
Until now there is no consensus in the academic literature as to whether Fidesz is a (soft) Eurosceptic party or rather Europragmatic. By identifying the manifestations of Euroscepticism on the policy level rather than the party level, this article sheds light on the dynamics of Fidesz’s Euroscepticism. It also looks at the party strategy of Fidesz regarding its main Eurosceptic competitor Jobbik, and how this facilitated further Euroscepticism. Hungary’s vision of the EU is at odds with the vision of most member states and EU institutions, which makes Fidesz not only Eurosceptic; but there is a form of inverted soft Euroscepticism characterising Fidesz’s vision and policies towards the EU.
Trajectories of social democracy in the Baltic countries: choices and constraints
Authors: Gudžinskas Liutauras 
Published: May 2020

Abstract
This article focuses on social democratic parties in the Baltic states. The evolution of the democratic left in these countries deviates from more researched cases of social democratic parties in the Visegrád countries. Although the Lithuanian Social Democratic party (LSDP) had been developing in a similar way to its counterparts in Hungary, Poland and Czechia, its efforts to rebound after a crushing defeat in the 2016 parliamentary elections have proved to be far more successful. Meanwhile, Estonian and Latvian Social Democrats from the outset had to compete under the prevalence of right-wing parties in highly heterogenous societies. However, despite similar initial conditions, their eventual trajectories crucially diverged. Hence, a research puzzle is double: how to explain LSDP’s deviation from similar Visegrád cases, and what are the main factors that led to the differentiation of Estonian and Latvian social democratic parties? While the current research literature tends to emphasise structural and external causes, this paper applies an organisational approach to explain the different fortunes of the democratic left in the Baltic countries as well as other East-Central European states.
Polish Regional Elite Career Paths and the Impact of a Multilevel System
Authors: Majchierkiewicz Tatiana 
Published: May 2020

Abstract
This paper aims to investigate the multilevel careers of members of Polish regional executives from the first direct election to regional parliaments in 1998 until the end of 2014. Formation of self-government in regions is assumed to have started the process of formation of the multilevel system in Poland. Consequently, political career paths began to be diversified and to take place at more than one level. Among the factors with a critical impact on the specificity of Polish regional careers was the fact that regionalisation was preceded by local government reform (1990), and it was assumed that the local elite would become its natural recruitment base. On the one hand, the challenge to the development of the multilevel system has to be recognised. First, regional politics has undergone rather limited professionalisation (only positions in regional executives are full-time political jobs). Second, the legacy of communist centralisation resulted in lukewarm regional decentralisation in 1998. However, one can observe a certain increased prominence of self-government due to access to EU funds and increased financial autonomy. Positions in regional executive boards, especially as heads of regional boards [marszałkowie], have been seen as increasingly attractive career choices for professional politicians. Therefore, modification of the traditional career model is expected, e.g. some inflow of national politicians into regional boards (from positions in the legislature to executive posts).
Identity according to Francis Fukuyama: An obstacle to the end of history
Authors: Paďour František 
Published: May 2020

Abstract
This review essay focuses on Francis Fukuyama’s book Identity: The Demand for Dignity and the Politics of Resentment, which was published in 2018. The text emphasises placing Fukuyama’s new publication in the context of his multi-year work for its correct interpretation. Fukuyama’s conception of the human soul is analysed in confrontation with contemporary issues of liberal democracy. It mentions other authors criticisms of Fukuyama’s work and, at the same time, it is defended by Fukuyama himself. The text can be seen as an introduction to Francis Fukuyama’s reasoning regarding the modern problems of liberal democracy and as an attempt to understand his unsuccessful prediction of the end of history. The central theme of the text is the concept of identity, which Fukuyama describes as a source of conflicts and friction areas in modern societies. Fukuyama’s findings are supplemented by the findings of other authors and current world events.
Three phase partitioning as a rapid and efficient method for purification of plant-esterase from wheat flour
Authors: Dong Liang , He Linxin , Huo Danqun 
Published: May 2020

Abstract
Three-phase partitioning (TPP) was used to purify plant-esterase from wheat flour. Effect of various process parameters has been evaluated and plant-esterase was purified to 11.35-fold by optimized single step TPP system (50%, (w/v) (NH4)2SO4 saturation, 1:1 (v/v) ratio of crude extract: t-butanol at pH 4).The enzyme was found to be exclusively partitioned in the aqueous phase. Using TPP system, plant-esterase quickly purified to homogeneity with very high purity and activity. On the basis of single factor research, purification process was optimized by using response surface method, established a new type of high efficient purification plant-esterase method. To the best of our knowledge, this is the first report for purification and characterization of plant-esterase by using three phase partitioning (TPP). The results indicated that, TPP is a simple, quick, economical and very attractive process for purification of plant-esterase compared to conventional chromatographic protocols.
Conversion coefficients from fluence and air kerma to personal dose equivalent for monoenergetic photons using analytical fit and Monte Carlo simulation
Authors: Kanti Hassan Al , Hajjaji O. El , Bardouni T. El 
Published: May 2020

Abstract
The present study aims to calculate a new database of conversion coefficients from fluence and air Kerma to personal dose equivalent in two terms: absorbed dose and Kerma-approximations. In this work, we propose a new equation to perform an analytical fit of our Monte Carlo (MC) calculated conversion coefficients for photons for different angles. Also, we have calculated the conversion coefficients using the EGSnrc code. The conversion coefficients have been calculated for beams of monoenergetic photons from 0.015 to 10 MeV, incident on phantom ICRU for angles of incidence from 0° to a 75° in steps of 15°. Our computed values agree well when compared with those published for the ICRU 57 in Kerma-approximations with statistical uncertainties in the calculation around 2%. We can conclude from this work that the analytical approach is successful and powerful such as Monte Carlo methods to calculate the operational quantities.
Calculation of the Dynamic Characteristics of Ship’s Aft Stern Tube Bearing Considering Journal Deflection
Authors: Yang Hongjun , Li Jun , Li Xiaolong 
Published: May 2020

Abstract
Dynamic properties are vital for the working reliability of aft stern tube bearings. However, the determination of such properties currently involves several simplifications and assumptions. To obtain its dynamic characteristics accurately, the aft stern tube bearing was divided into several bearing segments. The oil film reaction force was considered in the calculation of shaft alignment, and the journal deflection and actual oil film thickness were obtained accordingly. Subsequently, the perturbed Reynolds equation was solved using the finite difference method when the dynamic characteristics of journal bearings with finite width were evaluated. Then, a calculation program was developed and verified by comparing with the results of other studies. Finally, the dynamic characteristics were calculated under different revolutions. The results showed that the stiffness at the vertical direction of the aft stern tube bearing was several times that of the horizontal direction and varied with the revolutions of the shafting system. These findings can provide the foundation for the precise calculation of the journal trajectory under dynamic conditions, as well as for the evaluation of the oil film thickness. Moreover, the results led to favorable conditions for the accurate calculation of the shafting whirling vibration.
A Comparative Measurement Study of Web Tracking on Mobile and Desktop Environments
Authors: Yang Zhiju , Yue Chuan 
Published: May 2020

Abstract
Web measurement is a powerful approach to studying various tracking practices that may compromise the privacy of millions of users. Researchers have built several measurement frameworks and performed a few studies to measure web tracking on the desktop environment. However, little is known about web tracking on the mobile environment, and no tool is readily available for performing a comparative measurement study on mobile and desktop environments. In this work, we built a framework called WTPatrol that allows us and other researchers to perform web tracking measurement on both mobile and desktop environments. Using WTPatrol, we performed the first comparative measurement study of web tracking on 23,310 websites that have both mobile version and desktop version web-pages. We conducted an in-depth comparison of the web tracking practices of those websites between mobile and desktop environments from two perspectives: web tracking based on JavaScript APIs and web tracking based on HTTP cookies. Overall, we found that mobile web tracking has its unique characteristics especially due to mobile-specific trackers, and it has become increasingly as prevalent as desktop web tracking. However, the potential impact of mobile web tracking is more severe than that of desktop web tracking because a user may use a mobile device frequently in different places and be continuously tracked. We further gave some suggestions to web users, developers, and researchers to defend against web tracking.
Secure and Scalable Document Similarity on Distributed Databases: Differential Privacy to the Rescue
Authors: Schoppmann Phillipp , Vogelsang Lennart , Gascón Adrià , Balle Borja 
Published: May 2020

Abstract
Privacy-preserving collaborative data analysis enables richer models than what each party can learn with their own data. Secure Multi-Party Computation (MPC) offers a robust cryptographic approach to this problem, and in fact several protocols have been proposed for various data analysis and machine learning tasks. In this work, we focus on secure similarity computation between text documents, and the application to k-nearest neighbors (k-NN) classification. Due to its non-parametric nature, k-NN presents scalability challenges in the MPC setting. Previous work addresses these by introducing non-standard assumptions about the abilities of an attacker, for example by relying on non-colluding servers. In this work, we tackle the scalability challenge from a different angle, and instead introduce a secure preprocessing phase that reveals differentially private (DP) statistics about the data. This allows us to exploit the inherent sparsity of text data and significantly speed up all subsequent classifications.
T0RTT: Non-Interactive Immediate Forward-Secret Single-Pass Circuit Construction
Authors: Lauer Sebastian , Gellert Kai , Merget Robert , Handirk Tobias , Schwenk Jörg 
Published: May 2020

Abstract
Maintaining privacy on the Internet with the presence of powerful adversaries such as nation-state attackers is a challenging topic, and the Tor project is currently the most important tool to protect against this threat. The circuit construction protocol (CCP) negotiates cryptographic keys for Tor circuits, which overlay TCP/IP by routing Tor cells over n onion routers. The current circuit construction protocol provides strong security guarantees such as forward secrecy by exchanging 𝒪(n
2) messages.
For several years it has been an open question if the same strong security guarantees could be achieved with less message overhead, which is desirable because of the inherent latency in overlay networks. Several publications described CCPs which require only 𝒪(n) message exchanges, but significantly reduce the security of the resulting Tor circuit. It was even conjectured that it is impossible to achieve both message complexity 𝒪(n) and forward secrecy immediately after circuit construction (so-called immediate forward secrecy). Inspired by the latest advancements in zero round-trip time key exchange (0-RTT), we present a new CCP protocol Tor 0-RTT (T0RTT). Using modern cryptographic primitives such as puncturable encryption allow to achieve immediate forward secrecy using only 𝒪(n) messages. We implemented these new primitives to give a first indication of possible problems and how to overcome them in order to build practical CCPs with 𝒪(n) messages and immediate forward secrecy in the future.
12. The Methodology of Music Education Lesson Completeness by Means of the Vocal-Choral Singing Dominant Activity
Authors: Caliga Marina 
Published: May 2020

Abstract
Choral singing has always been an activity in which the participant, the choir singers sang together, achieved the same goals, lived and perceived music together. In the music education lesson, the choral-vocal singing is an activity with great teaching and educational possibilities. It is one of the most accessible ways of interpreting music in school. This article methodologically investigates the completeness of the music education lesson with the dominant activity of vocal-choral singing.
Methods of Maintaining Soil Depth Evenness During Disk Tillage
Authors: Zubko V. , Khvorost T. , Zamora O. , Onychko V. 
Published: May 2020

Abstract
The article examines agro-technical requirements of machine implements with disk working bodies and is aimed to investigate the existing and alternative methods of depth regulation during soil tillage by the mentioned implements. We defined the machines performance indicators significantly affecting the plant potential release not considered previously. The study results were obtained via the soil tilling depth regulation by the disking speed, the change of an incidence angle of the working batteries, and by the use of the additional load mounted on the machine frame. The article presents a two-year research results obtained in 40 different land plots of the Sumy region (Ukraine) using domestic and imported machines, with wheat and buckwheat as crops. To ensure the study accuracy, the methodology was based on the CND 46.16.02.-96. Agricultural Machinery. Quality Indicators Nomenclature (Catalogue of Normative Documents, published in 1997). The research results demonstrate that the tilling depth depends on the manufacturing plant default settings, the speed regime, and the machine load. For the experimental data analysis, the Least Squares Means method was used. The research presents alternative methods of changing the tilling depth applicable for any machine aggregates with disk working bodies, and its results can serve the agricultural machinery designers.
The Recuperative Heat Exchangers – The Mean Temperature Difference in the Special Cases of Heat Transfer
Authors: Štefan Gužela , František Dzianik 
Published: May 2020

Abstract
The heat exchangers are used to heat or cool the material streams. To calculate the heat exchanger, it is important to know the type of heat exchanger and its operating characteristic. This characteristic determines one of the key variables (e.g., F, NTUmin, or θ). In some special cases, it is not necessary to know its operating characteristic to calculate the heat exchanger. This article deals with these special cases. The article also contains a general dependency that allows checking the key variables related to a given heat exchanger.
Prediction of the Boundary States for Thin-Walled Axisymmetric Shells Under Internal Pressure and Tension Loads
Authors: Halyna Kozbur , Oleh Shkodzinsky , Ihor Kozbur , Nadiia Gashchyn 
Published: May 2020

Abstract
A method for calculating the ultimate true stresses arising in the walls of shells of revolution in the area of uniform plastic deformation is developed in the research. In order to derive the stability loss for the plastic deformation process the criterion of maximum load is taken as the basis, simple differential equations were solved. It has been shown analytically that the level of the boundary true stresses is much lower when the values of the principal stress ratios approach to 2 or 1/2 compared to the adjacent stress states.
Solution of a Gas Pipeline Buried in Ground by Stochastic Approach
Authors: Silvia Mihelová , Karel Frydrýšek , Roland Jančo 
Published: May 2020

Abstract
The paper deals with stress and reliability calculation of a gas pipeline straight section buried in a ground (elastic foundation) loaded by heating and internal overpressure. Mathematical derivation of relations necessary for reliability calculation of the pipeline section by stochastic approach is also included in the paper. Resulting values are obtained by software Anthill using the Monte Carlo method. Input random parameters of the examined pipeline section are shown by bounded histograms.
Impact of Long-Term Operation on the Reliability and Durability of Transit Gas Pipelines
Authors: Igor Okipnyi , Lyubomyr Poberezhny , Vasyl Zapukhliak , Andrii Hrytsanchuk , Liubov Poberezhna , Andrij Stanetsky , Viktoria Kravchenko , Ihor Rybitskyi 
Published: May 2020

Abstract
Corrosion and corrosion-fatigue tests of the material of the pipeline, which was in operation for 41 years. It has been shown that prolonged operation reduces the parameters of resistance to fatigue and prolonged static loading in corrosive environments. It was established that the degradation of physical and mechanical properties is insignificant, Ukraine’s main gas pipelines are ready to operate at full capacity provided that timely monitoring measures are carried out.
Methods of Designing Gear’s Machining Tools with the Hyperboloid Cutting Part
Authors: Boris Vorontsov , Miroslav Bosansky , Iryna Kyrychenko , Nataliya Kuzmenko , Vadym Stupnytskyy , Yuriy Kuleshkov , Alexander Ustinenko 
Published: May 2020

Abstract
The technique of obtaining a hyperboloidal gear engagement with linear contact between a cylindrical involute wheel and a hyperboloid producing worm is considered. The resulting cutting tool greatly simplifies the manufacturing technology of hyperboloid worms and hyperboloid gears along with improved accuracy and roughness of the machined teeth and lower manufacturing costs.
A Micro-Level Investigation of Optimum Lime-Content Stabilized Expansive Soil Amended with Organic Coconut Shell Powder
Authors: James Jijo 
Published: May 2020

Abstract
The experimental investigation involved stabilizing an expansive soil using lime, amending the stabilization process with varying doses of coconut shell powder (CSP), and studying the effects of the amendment on the strength, index properties, mineralogy, and microstructure of the stabilized soil. The optimum lime content (OLC) for the maximum strength gain of the stabilized soil was determined by performing unconfined compressive strength (UCS) tests. The stabilization process was amended with four different proportions of CSP, and the UCSs of the amended specimens were evaluated and compared. The spent UCS samples were crushed and pulverized to perform index property tests as well as mineralogical (XRD) and micro-structural (SEM) tests. The results of the investigation revealed that amending the lime stabilization process with CSP yielded positive results only at a low dosage of 0.25%. It is concluded that materials of an organic origin such as CSP need to be adopted in low dosages to reap beneficial effects in the stabilization process.