bluuebunny/crossref_metadata_2025_split huggingface dataset:
A comprehensive and updated review of studies on the oxidation of cyclohexane to produce ketone-alcohol (KA) oil
Authors: Abutaleb Ahmed , Ali Mohammad Ashraf 
Published: April 2021

Abstract
Oxidation of cyclohexane is an essential chemical reaction for the industrial manufacture of cyclohexanol and cyclohexanone. These two compounds, together known as ketone–alcohol (KA) oil, are the main feedstock for nylon 6 and nylon 6,6 productions. Several types of catalysts and reaction conditions have been used for cyclohexane oxidation. This paper presents a thorough literature review of catalytic materials used for cyclohexane oxidation to produce KA oil using oxygen, air and other oxidizing agents as well as utilizing different solvents. This review covers research and development reported over the years 2014–2020. This review aims to comprehend the type of catalysts, solvents, oxidants and other reaction parameters used for the oxidation of cyclohexane. Three types of cyclohexane oxidation processes namely thermocatalytic, photocatalytic and microwave-assisted catalytic have been reported. The results of the review showed that metal and metal oxide loaded silica catalysts performed excellently and provided high selectivity of KA oil and cyclohexane conversion. The use of peroxides is not feasible due to their high price compared to air and oxygen. Gold nanoparticles supported on silica performed with high selectivity and good conversion. The use of hydrochloric acid as an additive was found very effective to enhance the photocatalytic oxidation of cyclohexane. Water on the catalyst surface enhanced the reactivity of the photocatalysts since it helps in the generation of hydroxyl radicals.
Complementary and alternative medicine therapies and COVID-19: a systematic review
Authors: Badakhsh Mahin , Dastras Majid , Sarchahi Zohreh , Doostkami Mahboobe , Mir Adel , Bouya Salehoddin 
Published: April 2021

Abstract

Objectives
Despite the high prevalence of coronavirus and various treatment approaches, including complementary and alternative medicine (CAM), there is still no definitive treatment for coronavirus. The present study aimed to evaluate the effect of CAM interventions on COVID-19 patients.

Content
Four databases (Web of Science, PubMed, Scopus, and EMBASE) were searched from the inception of databases until July 16, 2020. Keywords included complementary and alternative medicine therapies and Coronavirus.

Summary and Outlook
Of the 1,137 studies searched, 14 studies performed on 972 COVID-19 patients entered the systematic review final stage. The results showed that different CAM interventions (acupuncture, Traditional Chinese medicine [TCM], relaxation, Qigong) significantly improved various psychological symptoms (depression, anxiety, stress, sleep quality, negative emotions, quality of life) and physical symptoms (inflammatory factors, physical activity, chest pain, and respiratory function) in COVID-19 patients. The results showed that various CAM interventions have a positive effect on improving the various dimensions of coronavirus disease but since there are few studies in this regard, further studies using different CAM approaches are recommended.
Paying the Price: Contextualizing Exchange inPhaedo69a–c
Authors: Morgan Kathryn 
Published: April 2021

AbstractThis paper uses a problematic passage atPhaedo69a–cas a case study to explore the advantages we can gain by reading Plato in his cultural context. Socrates argues that the common conception of courage is strange: people fear death, but endure it because they are afraid of greater evils. They are thus brave through fear. He proposes that we should not exchange greater pleasures, pains, and fears for lesser, like coins, but that there is the only correct coin, for which we must exchange all these things: wisdom (phronēsis). Commentators have been puzzled by the precise nature of the exchange envisaged here, sometimes labelling the coinage metaphor as inept, sometimes describing this stretch of argument as “religious” and thus not to be taken seriously. The body of the paper looks at (1) the connection between money and somatic materialism, (2) the incommensurability in Plato of financial and ethical orders, (3) financial metaphors outside Plato that connect coinage with ethics, (4) intrinsic and use values in ancient coinage, and (5) Athenian laws on coinage, weights, and measures that reflect anxiety about debased coins in the fifth and early fourth centuries. It sees thePhaedopassage as the product of a sociopolitical climate which facilitated the consideration of coinage as an embodiment of a value system and which connected counterfeit or debased currency with debased ethical types. Athenians in the early fourth century were much concerned with issues of commensurability between different currencies and with problems of debasement and counterfeiting; understanding this makes Socrates’ use of coinage metaphors less puzzling. Both the metaphor of coinage and the other metaphors in this passage of thePhaedo(painting and initiation) engage with ideas of purity, genuineness, and deception. Taken as a group, these metaphors cover a large area of contemporary popular culture and are used to illustrate a disjunction between popular and philosophical ways of looking at value.
Plato’sTheaetetusand the Hunting of the Proposition
Authors: Brown Lesley 
Published: April 2021

AbstractSection 1 contrasts the approaches to Plato of F.M.Cornford and Gilbert Ryle, two of the early twentieth century’s leading Plato interpreters. Then I trace and evaluate attempts to discern in Plato’sTheaetetusa recognition of the role of the proposition. Section 2 focuses on the hunting of the proposition in Socrates’ Dream in theTheaetetus. Ryle, inspired by Logical Atomism, argued that Plato there anticipated an insight about the difference between names and propositions that Russell credited to Wittgenstein. I rehearse difficulties for understanding thelogosof the Dream as a proposition, preferring a reading oflogosthere as something like definition: a reading Wittgenstein also adumbrated. Section 3 examines attempts by writers such as Burnyeat and Kahn to find Plato allocating a starring role to the proposition in the argument atTheaetetus185–6: perception, since it cannot grasp being, cannot grasp truth and hence cannot be knowledge. On their reading a grasp of being is understood as a grasp of something propositional. Problems for the propositional reading include Socrates’ talk of grasping ‘the truthof something’ (alētheia tinos), and the way the dialogue develops after 186.
Effects of casing angle on the performance of parallel hub axial annular diffuser
Authors: Singh Hardial , Arora B.B. 
Published: April 2021

Abstract
In this paper, the effects of non-swirling and swirling flow on the performance of parallel hub axial annular diffuser has been investigated. The study was conducted on a fully developed swirling flow and non-swirling flow to predict the separation of the flow from the wall. Three different annular diffusers were used with casing wall angles of 3°, 6°, and 9°. Furthermore, various swirl angles (0–25°) at the inlet of diffusers have been investigated to analyze the performance across the length. It was found that parallel hub axial annular diffuser performance increases up to a certain length as the inlet swirl angle increases. However, the performance also improves as the diffuser area ratio (AR) increases. The performance is evaluated based on the static pressure recovery coefficient (Cp) and the total pressure loss coefficient (CTL). The highest possible pressure recovery is achieved by the 12° swirl angle with a casing angle of 6°.
Numerical study of the parameters of a gas turbine combustion chamber with steam injection operating on distillate fuel
Authors: Serbin Serhiy , Burunsuz Kateryna 
Published: April 2021

Abstract
Investigations of the working process in a gas turbine combustion chamber with ecological and energy steam injection operating on liquid fuel are conducted. The mathematical model of the aerodynamic processes and liquid fuel combustion in similar burning devices based on the numerical solution of the system of conservation and transport equations for a multi-component chemically reactive turbulent system is developed. The influence of the relative steam mass flow rate (the ratio of the sum of the mass flow rates of ecological and energy steam to the fuel consumption) on the combustion chamber’s emission characteristics is determined. The obtained results can be used for parameter selection and optimization of promising high-temperature gas turbine combustion chambers with steam injection operating on liquid fuels.
Conjugate heat transfer analysis of a radially cooled nozzle guide vane in an aero gas turbine engine
Authors: Arunkumar G. L. , Shetty Balachandra P. , Mishra R. K. 
Published: April 2021

Abstract
This paper presents a computational method to investigate cooling performance of NASA-C3X cascade vane coated with thermal barrier coating (TBC), for which experimental data are available. The vane was cooled internally by air flows through radially oriented 10 channels. A three-dimensional conjugate heat transfer simulation has been performed which allows the conduction-convection on metal vane by eliminating need of multiple boundary solutions. The predicted aerodynamic and thermal loads with the effect of turbulent intensity is found to be good agreement with experimental data and inclusion of TBC leads to quantitative reduction in vane metal temperature.
Active fault tolerant control of turbofan engines with actuator faults under disturbances
Authors: Ma Yan-Hua , Du Xian , Gou Lin-Feng , Wen Si-Xin 
Published: April 2021

Abstract
In this paper, an active fault-tolerant control (FTC) scheme for turbofan engines subject to simultaneous multiplicative and additive actuator faults under disturbances is proposed. First, a state error feedback controller is designed based on interval observer as the nominal controller in order to achieve the model reference rotary speed tracking control for the fault-free turbofan engine under disturbances. Subsequently, a virtual actuator based reconfiguration block is developed aiming at preserving the consistent performance in spite of the occurrence of the simultaneous multiplicative and additive actuator faults. Moreover, to improve the performance of the FTC system, the interval observer is slightly modified without reconstruction of the state error feedback controller. And a theoretical sufficiency criterion is provided to ensure the stability of the proposed active FTC system. Simulation results on a turbofan engine indicate that the proposed active FCT scheme is effective despite of the existence of actuator faults and disturbances.
Simulation and analysis of an aero-engine combustor with a slinger fuel injection system
Authors: Cohen Ariel Y. , Sattarov Artemii , Claramunt Kilian , Anker Jan E. , Romagnosi Luigi , Baux Yannick , Hirsch Charles 
Published: April 2021

Abstract
The use of Computational Fluid Dynamics (CFD) is now central to the design process of aero-engine combustors, enabling optimal, safe and stable operation, increased efficiencies, and the reduction of pollutant emission. To benefit maximally from the use of CFD it is essential to account for the relevant physical phenomena, in particular the fuel spray breakup and its evaporation. Different strategies for modelling the injection of fuel spray are applied - in the simplest approach the fuel is assumed to be gaseous upon injection, in the most advanced approach the fuel is modelled, using a Lagrangian-Eulerian approach, as a liquid spray which breaks up, evaporates and eventually burns inside the combustion chamber. The effects of the various modelling strategies on the flow, temperature, and compositional fields are investigated. The radial distribution of the simulated temperature field is compared to experimental data, demonstrating that acceptable accuracy is only achieved when the fuel is modelled as a liquid spray and a two-way momentum coupling between the spray and the gas-phase is accounted for.
Syncretism of plural forms in Spanish Dialects
Authors: Mare María 
Published: April 2021

AbstractOne of the main discussions about the interaction between morphology and syntax revolves around the richness or poverty of features and wherever this richness/poverty is found either in the syntactic structure or the lexical items. A phenomenon subject to this debate has been syncretism, especially in theories that assume late insertion such as Distributed Morphology. This paper delves into the syncretism observed between the first person plural and the third person in the clitic domain in some Spanish dialects. Our analysis will lead to a revision of the distribution of person features and their relationship with plural number, while at the same time it will shed light on other morphological alternations displayed in Spanish dialects; that is, subject-verb unagreement and mesoclisis in imperatives. In order to explain the behavior of the data under discussion, I propose that lexical items are specified for all the relevant features at the moment of insertion, although the values of these features can be neutralized. I argue that the distribution proposed allows for some fundamental generalizations about the vocabulary inventories in Spanish varieties, and shows that the variation pattern exhibits an *ABA effect, i.e., only contiguous cells in a paradigm are syncretic.
ErNi2.23Al2.77 and YbNi2.31Al2.69 – i3 superstructures of the CaCu5 type
Authors: Zaremba Nazar , Muts Ihor , Pavlyuk Volodymyr , Hlukhyy Viktor , Pöttgen Rainer , Zaremba Vasyl 
Published: April 2021

Abstract
The title compounds have been synthesized by reaction of the elements in sealed tantalum crucibles in a muffle furnace using special annealing sequences. The crystal structures of YbNi2.31Al2.69 (R1 = 0.0100 for 212 F
2 values and 18 variables) and for ErNi2.23Al2.77 (R1 = 0.0154 for 255 F
2 values and 18 variables) were refined from single crystal X-ray data. They belong to the YNi2Al3 type (i3 superstructure of CaCu5) with the following crystallographic parameters: space group

P
6

/

m
m
m

$P6/mmm$

, Pearson symbol hP18, Z = 3, a = 8.2723(12), c = 4.0672(8) Å, V = 241.03(8) Å3 for YbNi2.31Al2.69 and a = 8.9109(13), c = 4.0669(8) Å, V = 279.66(8) Å3 for ErNi2.23Al2.77. The crystal chemical discussion is supported by electronic structure calculations.
A neveléslélektan a korai Kádár-korszakban
Authors: Darvai Tibor 
Published: April 2021

Összefoglaló. Az 1950-es évek közepétől kezdve lehetőség nyílt a
pszichológia legitim művelésére a Szovjetunióban és az érdekszférájába tartozó
országokban, így Magyarországon is. A diszkreditáció megszűnése érvényes volt a
pszichológia egyik alkalmazott területére, a neveléslélektanra is. E
változássorozat egyik elemeként 1956-ot követően az egyetemi-akadémiai mezőben
sorra születtek a neveléslélektani kandidátusi disszertációk először a
neveléstudomány, majd az 1960-as években már a pszichológia tudományának
területén. Ezzel párhuzamosan a hatvanas években létrejött a neveléslélektannak
egy másik iránya, mely nem az egyetemi-akadémiai, hanem a főiskolai szférához
tartozott. Kutatásunkban e két neveléslélektani irányzat kialakulásának
történetét és főbb jellemzőit tárjuk fel.
Summary. From the mid-1950s, there was an opportunity to cultivate
psychology legitimately in the Soviet Union and in the countries belonging to
its sphere of interest, including Hungary. The termination of the discredition
was valid for all the psychological fields as well as for educational
psychology. As one of the results of this change, after 1956,
academic-university level Candidate dissertations were published, one after the
other in educational psychology, first in the field of educational science and
then in psychology, in the 1960s. At the same time, another direction of
educational psychology emerged which belonged not to the academic-university
level but to the college sphere. In our research, we will reveal the main
features and the history of the development of these two educational
psychological directions.
Várkonyi Hildebrand és a Polgári Iskolai Tanárképző Főiskola Szegeden
Authors: Fizel Natasa 
Published: April 2021

Összefoglaló. Jelen tanulmányom témája az Állami Polgári Iskolai
Tanárképző Főiskola szegedi megalapítása és hazánk első Pedagógiai-Lélektani
Intézetének létrejötte, valamint első vezetőjének, a katolikus Várkonyi
Hildebrandnak a munkássága. Intézetében a neveléstudomány és a pszichológia
egymástól elválaszthatatlan egységként működött. Munkámban bemutatom Szegedre
kerülésének különleges körülményeit, amelyek kiváltó oka elsősorban az volt,
hogy a protestáns jellegű kolozsvári egyetem 1921-től kezdődően Szegeden, egy
püspöki székhelyen került elhelyezésre. Klebelsberg a Bölcsészkar alacsony
látogatottságát növelni kívánta, a katolikus lobbi nyomására az egyetem
protestáns jellegét pedig csökkenteni. Ebbe a folyamatba illeszkedik a budapesti
székhelyű polgári iskolai tanár-, illetve tanárnőképző főiskolák összevonása és
Szegedre helyezése, valamint ezzel párhuzamosan a felekezeti tanárképzők
megszüntetése. Várkonyi pedagógia-lélektana a főiskolások egyetemre való
áthallgatása révén beépült a polgári iskolai tanárok kultúrájába.
Summary. My following study is about the establisment of the State
Civic School Teacher’s Training College in Szeged. It also contains information
about the establishment of our country’s first Educational-Psychological
Instute, and of it’s first (catholic) headmaster’s, Hildebrand Várkonyi’s work.
The University of Szeged was put together of protestant teachers from the
university in Kolozsvár in 1921. The Religious and Educational Board helped
increase the attendance of the Faculty of Liberal Arts, but also decreased the
protestant nature of it. The Religious and Educational Board also achieved this
by moving the state, and catholic teacher’s training college from Budapest to
Szeged and by duplicating the departments of the remaining protestant Faculties
of Liberal Arts. Várkonyi’s pedagogy and psychology got built into the culture
of civic schools.
Politik Hukum Dalam Pelaksanaan Jaminan Fidusia Berdasarkan Undang-Undang Nomor 4 Tahun 1999
Authors: Pamungkas Leera Sinta Mega 
Published: April 2021

Fidusia adalah pengalihan hak kepemilikan atas benda menggunakan asas kepercayaan dengan ketentuan bahwa benda yang menjadi hak terhadap kepemilikan dialihkan tersebut tetap menjadi hak milik pemilik benda. Dalam Undang-Undang Nomor 42 Tahun 1999 perumusan UU Fidusia belum mencerminkan adanya kepastian hukum, karena rumusan norma yang terkandung didalamnya masih menimbulkan dualisme penafsiran dan terdapat pasal-pasal UU bertentangan pasal satu dengan pasal yang lain lain. Penelitian ini menggunakan pendekatan Kualitatif dan metode penelitian hukum, menghasilkan perjanjian jaminan fidusia belum melindungi para kreditur dengan perlindungan hukum yang kuat, padahal kreditur juga memiliki peranan penting dalam kegiatan ekonomi secara luas dan penjaminan secara sempit. Penelitian ini bertujuan untuk mengetahui perlindungan hukum terhadap kreditur agar tercapai kepastian hukum dalam perjanjian jaminan fidusia dengan metode yuridis- normatif.
ECG Denoising Using Artificial Neural Networks and Complete Ensemble Empirical Mode Decomposition
Authors: Et. al. Rajesh Birok, 
Published: April 2021

Electrocardiogram (ECG) is a documentation of the electrical activities of the heart. It is used to identify a number of cardiac faults such as arrhythmias, AF etc. Quite often the ECG gets corrupted by various kinds of artifacts, thus in order to gain correct information from them, they must first be denoised. This paper presents a novel approach for the filtering of low frequency artifacts of ECG signals by using Complete Ensemble Empirical Mode Decomposition (CEED) and Neural Networks, which removes most of the constituent noise while assuring no loss of information in terms of the morphology of the ECG signal. The contribution of the method lies in the fact that it combines the advantages of both EEMD and ANN. The use of CEEMD ensures that the Neural Network does not get over fitted. It also significantly helps in building better predictors at individual frequency levels. The proposed method is compared with other state-of-the-art methods in terms of Mean Square Error (MSE), Signal to Noise Ratio (SNR) and Correlation Coefficient. The results show that the proposed method has better performance as compared to other state-of-the-art methods for low frequency artifacts removal from EEG.
A Differentiation of Gifted and Talented Singers
Authors: Et.al Mohd Azharabu Bakar 
Published: April 2021

This journal purposes on the studies of correct vocal singing techniques and knowledge sharing information. The methodology used in this study was throughacquiring vocal aesthetics and improvisations in singing skills from gifted singers derived through interviewsfromsome of Malaysia’s mostgifted stars.The discovery of this study with regards to theanalysis on the differentiation of vocal characteristic aims to indicate positive and innovative results against negative and stereotype emulated singing of amateur singers.Through the findings of this research, amateur and aspiring new singers shall be able to learn to sing and perform properly. The main findings and results aretabled from the top to the least based on important tips like feel, innovative methods, techniques and creativity invarious singing performances. Practical contribution of this study will be a useful guideline not only to artistes but vocal teachers and record companies.This journal purposes on the studies of correct vocal singing techniques and knowledge sharing information. The methodology used in this study was throughacquiring vocal aesthetics and improvisations in singing skills from gifted singers derived through interviewsfromsome of Malaysia’s mostgifted stars.The discovery of this study with regards to theanalysis on the differentiation of vocal characteristic aims to indicate positive and innovative results against negative and stereotype emulated singing of amateur singers.Through the findings of this research, amateur and aspiring new singers shall be able to learn to sing and perform properly. The main findings and results aretabled from the top to the least based on important tips like feel, innovative methods, techniques and creativity invarious singing performances. Practical contribution of this study will be a useful guideline not only to artistes but vocal teachers and record companies.
Squeeze Casting of Sic,Fly-Ash Reinforced Aluminium Alloy Hybrid Composites-A Review
Authors: Et.al Maraparambil Ramachandran 
Published: April 2021

Aluminum alloys reinforced composite materials have been widely used in automobile, aeronautical and other commercial applications. Aluminum composites are light weight material with high specific strength, specific modulus, stiffness, heat resistant,eco-friendly and have extreme properties so used in large volumes. Due to these circumstances;we have to reduce the price and weight of the composites, improve and increase physical and mechanical properties. One of the ways to reduce the cost of composites is reducing the cost of reinforcement by using cheap, weightless, and easily available materials like fly ash and improving the properties by adding sic. These properties are achieved through the properties intrinsic in them and the size, shape, orientation, weight and distribution.
Several casting methods are used by the industries to manufacture the composite products, and each casting method has its own pros and cons. In traditional process, defects of pore formation due to gas, shrinkage porosities are regular and these defects decrease the mechanical properties and integrity of the end product. To overcome such defects,comparatively better squeeze casting method can be implemented.