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Number of results: 130
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Abstract

This article contributes to the growing literature on Art. 7 TEU by showcasing the strong and weak points of this provision in the context of the on-going rule of law backsliding in Hungary and Poland – backsliding which threatens the very fabric of EU constitutionalism. The article presents the general context of the EU’s institutional reactions to the so-called “reforms” in Poland and Hungary, which are aimed at hijacking the state machinery by the political parties in charge. Next it introduces the background of Art. 7 TEU and the hopes the provision was endowed with by its drafters before moving on to analysis of its scope and all the mechanisms made available through this instrument, including the key procedural rules governing their use. The author posits that it may be necessary to put our hopes in alternative instruments and policies to combat the current rule of law backsliding, and the article concludes by outlining three possible scenarios to reverse the backsliding, none of which are (necessarily) connected with Art. 7 as such.

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Authors and Affiliations

Dimitry Kochenov
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Abstract

In the paper approximate controllability of second order infinite dimensional system with damping is considered. Applying linear operators in Hilbert spaces general mathematical model of second order dynamical systems with damping is presented. Next, using functional analysis methods and concepts, specially spectral methods and theory of unbounded linear operators, necessary and sufficient conditions for approximate controllability are formulated and proved. General result may be used in approximate controllability verification of second order dynamical system using known conditions for approximate controllability of first order system. As illustrative example using Green function approach approximate controllability of distributed dynamical system is also discussed.
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Authors and Affiliations

Jerzy Klamka
1
ORCID: ORCID
Asatur Zh. Khurshudyan
2

  1. Department of Measurements and Control Systems, Silesian University of Technology, Gliwice, Poland
  2. Institute of Mechanics, NAS of Armenia
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Abstract

The article addresses the issue of conditions that the borrower is obliged to fulfill during the crediting process. These terms, the so-called covenants are built into credit agreements and are aimed at limiting banks’ risk when financing business entities. However, at the same time, covenants constitute conditions limiting the scope of use of bank loans. Covenants are very diverse. The principle hypothesis of the study assumes that the covenants differ according to the type of credit and the characteristic of the industry and the financial situation of the enterprise. In order to examine the hypothesis, an analysis of 25 credit agreements in three corporations and their subsidiaries was undertaken. These entities belong to fuel, mining and metallurgical sectors. At the same time, we observe the extent to which these covenants were kept during four quarters of 2016 and two quarters of 2017. Due to the confidentiality of the data contained in the loan agreements, the names of groups and their companies were kept confidential at the request of their management. Studies have also shown that abiding by non-financial covenants has been more difficult than abiding by financial covenants. In covenants, several contracts stipulated that a company cannot freely dispose fixed assets, restructure them or use leased assets which hinders the use of those asset to repay debt. One major obstacle was the fact that the company could not undertake any additional business beyond the existing one. This hindered the diversification of companies’ activities, which would improve their competitive position on the market. The author intends to conduct further research on covenants to highlight their flexible use and to increase the availability of bank loans to business entities.

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Authors and Affiliations

Agata Sierpińska-Sawicz
ORCID: ORCID
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Abstract

The capacity market is a response to potential capacity scarcity in the system. The missing money problem may occur as a result of the dynamic development of renewable energy sources because their capacity factors are significantly lower in comparison to those of conventional generating units. The capacity market is a response to capacity scarcity in dynamic growth in renewable energy sources with lower capacity factors than thermal power plants. It is a support mechanism that provides additional funds in order for generation companies to be ready to produce electricity in system stress events. So far, seven capacity auctions have been held for 2021–2027 delivery periods. Since the vast majority of capacity market units are coal-fired public thermal power plants and combined heat and power plants, the analysis of capacity auction results provides valuable findings on coal consumption in the years to come. With this in mind, the objective of the study is to investigate the potential of coal consumption resulting from the long-term capacity contracts signed thus far. For this purpose, a comprehensive analysis of the capacity auctions’ results is conducted, including the analysis of the duration of the contracts, the structure of ownership, and fuels used in power units. The results show that the figures relating to the consumption of steam coal in units that have won capacity auctions are around 21,306 thousand Mg for 2023 and decreasing to 9,603 thousand Mg for 2035. Although European restrictions were introduced to limit remuneration for high-emission units, the long-term contracts ensure that these will remain in the system and will have an impact on the total consumption of steam coal in the medium- and long-term in the Polish power system.
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Authors and Affiliations

Aleksandra Komorowska
1
ORCID: ORCID

  1. Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Kraków, Poland
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Abstract

Concluding the series of papers on the semantics of distributiveness in Polish, this study deals with synonymics of temporal distributive constructions. Part II. presents the analysis of constructions with the remaining (apart from units of time) classes of lexemes used in distributive constructions (including names of specifi ed or unspecified periods of time, names of periods of the day, seasons of the year, days of the week, months, expressions functioning as modifi ers of date and nouns with no lexical meaning related to time.

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Authors and Affiliations

Czesław Lachur
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Abstract

False or “mad” jealousy is the central theme in William Shakespeare’s Othello and The Winter’s Tale. Both Othello and Leontes, the protagonists of the plays, seem to have great diffi culties distinguishing between the surface of things (or what they see) and the truth. Both can be classifi ed as tragic fi gures as they both commit an error of judgment – due to a fl aw in their nature (be it self-love or suspiciousness) they misjudge a key situation and are easily led astray. In fact, dramatic irony, which is evidently present in the plays, can be exemplified by a pragmatic analysis of these two texts. It is interesting to observe that both characters are focused on saving face in front of others, not only to avoid criticism by the society (Leontes) but also to be each able to cope with their wife’s supposed betrayal (Othello). Pragmatics helps establish the causes of the characters’ tragedy: Othello’s false jealousy is conceived by Iago’s infelicitous speech acts and develops only because Othello is unable to grasp Iago’s real intention in communication. On the other hand, Leontes in his obsession is looking for hidden meanings in things just to prove that he is right; his verbal behaviour abounds in examples of self-deceit. The aim of this article is to defi ne jealousy in pragmatic terms, using the speech act theory, felicity conditions, conceptual metaphor, and face.

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Authors and Affiliations

Urszula Kizelbach
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Abstract

This article examines how migration to Wales modifies Polish Catholic families’ religious practices. It focuses on how the First Communion ceremony is performed. Within the Polish migrant community I witnessed three distinct ways of arranging this. Some families travelled to Poland to their parish churches of origin. Of those who celebrated it in Wales, some did so in a Polish church, others in their children’s Catholic school’s church. These choices had different effects. Holding First Communion in Poland confirmed children’s Polish identity and home-country bonds. It exemplified both the fluidity of the families’ intra-European migration experience and the strength of transnational networking. Hold-ing it in the local Polish parish reinforced both families’ and childrens’ identification as Polish Catho-lics. In the school’s church, it strengthened migrant families’ negotiations of belonging and their children’s integration into the Welsh locality. Mothers’ active involvement in all settings led some to contest Polish religious customs and revealed emerging identifications related to children’s wellbeing and belonging. Unlike arrangements traditional in Poland, families’ religious practices in Wales seem to have become more individual, less collective.

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Authors and Affiliations

Aleksandra Kaczmarek-Day
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Abstract

The specific working conditions of the wind turbine in strong wind cause a number of problems in the measurement of noise indicators used in its short and long-term assessment. The wind is a natural working environment of the turbine, but it also affects the measurement system, moreover, it can be a secondary source of other sounds that interfere with the measurement. One of the effective methods of eliminating the direct impact of wind on the measurement system is placing the microphone on the measurement board at ground level. However, the obtained result can not be directly compared with the admissible values, as it has to be converted to a result at a height of 4 m. The results of previous studies show that this relation depends, inter alia, on the speed and direction of the wind. The paper contains the results of measurements on the measurement board, according to EN 61400-11:2013, and at a height of 4 m above ground made simultaneously in three points around the 2 MW turbine at various instantaneous speeds and changing wind directions. Analysis of the impact of measuring point location on the measurement result of noise indicators and the occurrence of additional features affecting the relationship between the values measured on the board and at the height of 4 m, and especially the tonality, amplitude modulation and content of low frequency content, was m

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Authors and Affiliations

Tadeusz Wszołek
Paweł Pawlik
Dominik Mleczko
Jagna Chronowska

Authors and Affiliations

Aleksandra Kuzior
1
ORCID: ORCID
Viacheslav Liashenko
2
ORCID: ORCID
Iryna Petrova
2
ORCID: ORCID
Oleksandr Serdiuk
2
ORCID: ORCID

  1. Silesian University of Technology, Poland; Department Applied Social Science, Silesian University of Technology, Poland; Academy of Economic Sciences of Ukraine, Ukraine
  2. Institute of Industrial Economy of the National Academy of Sciences of Ukraine, Ukraine
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Abstract

Supercritical antisolvent (SAS) method is an emerging technique for particle processing of high energetic materials. The study investigates the recrystallization of high energy material HMX (octahydro- 1,3,5,7-tetranitro-1,3,5,7-tetrazocine) using SAS method. The effect of pressure, solution flow rate, supercritical antisolvent flow rate and temperature on particle size and morphology of HMX crystals has been studied with acetone as solvent and supercritical carbon dioxide as antisolvent. Stable and desirable ��- polymorphic form of HMX could be obtained under certain process conditions and has been confirmed by FTIR spectroscopy. The experimental results show that ��- polymorph of HMX is of rhombohedral morphology with mean particle size of 13.7 μm, as confirmed by SEM and particle size analyzer respectively.
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Authors and Affiliations

Anupama Thakur
1
Taniya
1
Pramod Soni
2
Mahesh Kumar
2
Seema Deshwal
2

  1. Dr SSBUICET, Panjab University, Chandigarh, 160 014, India
  2. TBRL, DRDO, Chandigarh, 160 030, India
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Abstract

Twenty-eight two-, three-, four-, and five-component amine mixtures have been evaluated as possible activators of CO2 absorption into aqueous carbonate/bicarbonate solutions. Measurements were per- formed using a pressure autoclave with a sparger at conditions close to industrial ones. On the basis of these results, a formula for a new, more efficient amine activator named INS13 was developed. The activator was tested both in a pilot plant and on an industrial scale in an ammonia plant producing 300 tons/day of ammonia. Activator INS13 was applied in a number of ammonia plants in Poland and abroad.

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Authors and Affiliations

Grzegorz Bińczak
Ryszard Pohorecki
Władysław Moniuk
Cezary Możeński
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Abstract

Modern space measurement techniques like SLR, DORIS, VLBI and GNSS are used to study the tectonic plates. The determination of plate motion parameters (Φ, Λ, ω) from various geodetic measurements is outlined. This paper is the third part of our studies on estimating geodetic and geodynamic parameters; it regards an accuracy analysis of the determined Φ, Λ, ω parameters which describe motions of the tectonic plates using Very Long Base Interferometry (VLBI) technique. Prior to this, SLR and DORIS space measurement techniques were examined by authors. The study is based on the velocities of station positions, as included in a realization of the International Terrestrial Reference System– ITRF2008 forVLBI technique, published by the International Earth Rotation and Reference Systems Service (IERS). This model is made subject to an analysis in association with the APKIM2005 model. Six big plates, namely: Eurasian (EUAS), African (AFR), Australian (AUS), North American (NOAM), Pacific (PACF) and Antarctic (ANTC) were analysed. The results obtained in this analysis were compared with our previous estimations based on DORIS and SLR techniques and estimated according to the APKIM2005 model. Generally, all our three solutions based on SLR, DORIS and VLBI measurement techniques were found to be consistent.

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Authors and Affiliations

Marcin Jagoda
Miłosława Rutkowska
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Abstract

The proper functioning of the perinatal sucking reflex in calves is essential for the prevention of milk leakage into the rumen. The complex process behind its regulation is mediated at the gut level via multiple excitatory and inhibitory neurotransmitters, of which acetylcholine and nitric oxide are of fundamental importance. The aim of our study was to depict age-related alterations in the cholinergic and nitrergic innervation of the esophageal groove (EG) using immunohistochemistry and Real-Time PCR methods. We found out that the highest number of cholinergic nerve cells was present in the second trimester fetuses. From this developmental stage onward, their amount was gradually decreasing and reached the lowest value in 4-year-old cows. The same developmental pattern was observed for nitrergic nerve structures with the highest percentage of nitrergic neurons in the third trimester fetuses. Our observations prove that both neuronal populations are crucial for a proper closure of EG in calves. Therefore, their contribution to a general neuronal activity in the ENS diminishes with age as the high motility of a gastric groove is not necessarily required in older cattle.
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Bibliography

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Authors and Affiliations

M. Marszałek
1
T. Serzysko
1
W. Sienkiewicz
1

  1. Department of Animal Anatomy, Faculty of Veterinary Medicine, University of Warmia and Mazury, Oczapowskiego 13, 10-719 Olsztyn, Poland
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Abstract

This paper aims to open the discussion about historian’s emotions during the research process that has mostly been covered up. It does not pretend to be a thorough account of the topic but a modest essay that might encourage other researcher to reflect on their experiences. Firstly, we briefly describe the current situation in a few neighboring disciplines. Secondly, we explain how we understand emotions and use the terms emotion, feeling and sentiment. Thirdly, we discuss the reasons why most historians keep silent about their feelings. Fourthly, with two examples, we illustrate how historians have written about their emotions. Fifthly, we present a model of emotional phases of research by the Danish social psychologist Steinar Kvale and evaluate its relevance to historical research. Then we look at the causes and/or objects of feelings of students or beginning scholars in cultural history. Finally, we suggest some ways we historians could make our scholarly community emotionally a more supportive one. It might be good to remember that our discussion concerns primarily the Finnish academic world, and the situation in other countries might be slightly different.

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Authors and Affiliations

Leena Rossi
Tuija Aarnio
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Abstract

The present study was conducted to evaluate the effect of humic substances on performance and selected blood biochemical parameters in turkeys. A total of twenty 6-week-old turkey hybrids (Big 6) were divided into two groups. The first group of turkeys was fed the basal diet without any supplementation of humic substances as a control group. The second group was fed the basal diet supplemented with 5 g of humic substances per kg of diet. The study lasted 35 days, until the 11th week of age of the turkeys. The addition of humic substances had no effect on the live body weight, body weight gain, feed intake, feed conversion ratio, or growth rate of turkeys. Similarly, the monitored blood biochemical parameters, except for the levels of P, Mg, and Na, were not significantly affected by the addition of humic substances. The addition of humic substances led to a significant decrease in the concentration of P (p˂0.05), Mg (p˂0.05), and Na (p˂0.01) in the blood serum of turkeys. It was concluded that the addition of humic substances may lead to a reduction of some mineral substances in the blood of animals, which may be due to their chelating effects. This may indicate a reduced availability of some biologically important minerals for the body, which could subsequently manifest itself in some health issues and a decrease in animal production. During the duration of our study, there were no signs of disturbance in the health of the animals. In view of the achieved results, further studies will be necessary to determine the appropriate concentration and duration of administration of the monitored preparation and to evaluate its influence on the availability of nutrients and feed conversion and its possible use as a safe non-antibiotic growth stimulator in turkey nutrition.
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Authors and Affiliations

Hreško Šamudovská
1
L. Bujňák
1
A. Marcin
1
T. Mihok
1
M. Harčárová
1
L. Zábranský
2
P. Naď
1

  1. Department of Animal Nutrition and Husbandry, University of Veterinary Medicine and Pharmacy in Kosice, Komenskeho 73, 041 81 Kosice, Slovak Republic
  2. Department of Animal Husbandry Sciences, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Studentska 1668, 370 05 Ceske Budejovice, Czech Republic
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Abstract

In recent years, fractional slot concentrated winding permanent magnet synchronous motors (FSCW PMSMs) have become a hotspot in the research field. Due to the unique inductance characteristics of the FSCW PMSM, a fast and accurate calculation of the d/q-axis inductance and saliency ratio is necessary. In this paper, a method is proposed to calculate the d/q-axis reactance of the FSCW SPMSM, which constructs the equivalent magnetic circuit model of the d/q-axis armature reaction flux separately, and the saliency ratio characteristics of the FSCW SPMSM were demonstrated. In addition, to meet the high requirements of the modern industries, especially in servo systems, accurate consideration of the effect of stator resistance on torque and electromagnetic performance is important and more applicable. According to the relationship between the vector parameter, the explicit expression of the d/q-axis currents that consider the stator resistance is obtained, and the prediction of load angle at maximum electromagnetic torque is achieved. Then, combined with the finite element method, the influence mechanism of stator resistance on the motor steady-state performance is revealed. Finally, the experimental data are compared with the calculation data, and the correctness of the models and analysis was verified.
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Authors and Affiliations

Hongbo Qiu
1
Dong Wang
1
Cunxiang Yang
1
Kun Wang
1
ORCID: ORCID

  1. Zhengzhou University of Light Industry Zhengzhou, Henan, China
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Abstract

Plutella xylostella (L.), a menacing threat to cruciferous crops, exhibits cross-resistance to various chemical agents. The exploration of plant-derived insecticides emerges as an intervention strategy for the successful management of P. xylostella. Millettia pachyloba Drake is renowned as a traditional remedy for diverse health issues and has insecticidal properties. Experimental investigations in both laboratory and greenhouse settings utilized M. pachyloba extract (EMPE) at concentrations ranging from 2 to 10% (w/v). The objectives included inducing toxicity and controlling P. xylostella larvae effectively, assessing nutritional impacts through parameters like relative consumption rate (RCR), relative growth rate of larvae (RGR), efficiency of conversion of digested food (ECD), efficiency of conversion of ingested food (ECI), approximate digestibility (AD), and assimilation ratio (AR), and evaluating leaf damage inflicted by P. xylostella larvae on Brassica juncea. In the laboratory, the application of EMPE on P. xylostella larvae and pupae for 24, 48, and 72 hours yielded markedly higher mortality rates than the water-treated control (p < 0.05). Significant reductions in RGR, RCR, ECD, ECI, AD, and AR were evident throughout the larval stage (p < 0.05). In the greenhouse, EMPE treatments demonstrated notable differences from the water control treatment. On the 15th day of treatment, the EMPE treatment at 10% (w/v) exhibited the highest mortality rate (p < 0.05). Significantly reduced leaf damage was observed with EMPE treatments, displaying an inverse correlation with escalating concentrations. Particularly, the highest enhancement across all surveyed parameters was observed in the EMPE 10% (w/v) treatment, which was comparable to the positive control with fipronil (p > 0.05). Noteworthy differences in damage reduction percentage (DRP) were identified between EMPE contact treatments and the water control group (p < 0.05), indicating the promising potential of Millettia pachyloba extract for pest control.
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Authors and Affiliations

Thi Phuong Nhung Tran
1
Le Pham Tan Quoc
1

  1. Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, 12 Nguyen Van Bao street, 700000, Ho Chi Minh City, Viet Nam
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Abstract

It has been three decades since pulsating heat pipes were first introduced and garnered more attention due to their uncom-plicated structural design and superior heat transfer capabilities. The pulsating heat pipe of the original design is strongly affected by space orientation, which is connected with the influence of gravity. Even though more turns will hold pulsating heat pipe operational in any orientation, more space is needed to handle pulsating heat pipes, limiting its potential in space and the power electronics industry. This paper aims to present a comprehensive review of pulsating heat pipe's progress based on the most recent findings of both experimental and theoretical investigations of parametric influence on pulsating heat pipe thermal performance in horizontal and top heating modes. It aims to identify research gaps in pulsating heat pipe functioning in different orientations. Additionally, a comparative analysis of pulsating heat pipe design features described in the existing literature is conducted to determine the most promising designs for orientation-independent pulsating heat pipe systems. It is concluded that the integration of design attributes, encompassing an uneven-turn design, a channel struc-ture featuring alternating shapes and size of cross-section, and the utilization of nanofluids and binary mixtures as heat carriers are expected to serve as the basic reference for researchers aiming to achieve a stable pulsating heat pipe operation devoid of gravitational influences.
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Authors and Affiliations

Kishor Vishwanath Mane
1
Yevhenii Alekseik
2

  1. Faculty of Mechanical Engineering, Fr. C. Rodrigues Institute of Technology, Vashi, University of Mumbai, India
  2. Educational and Scientific Institute of Atomic and Thermal Energy, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine
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Abstract

This article investigates the impact of time-dependent magnetohydrodynamics free convection flow of a nanofluid over a non-linear stretching sheet immersed in a porous medium. The combination of water as a base fluid and two different types of nanoparticles, namely aluminum oxide (Al2O3) and copper (Cu) is taken into account. The impacts of thermal radiation, viscous dissipation and heat source/sink are examined. The governing coupled non-linear partial differential equations are reduced to ordinary differential equations using suitable similarity transformations. The solutions of the prin-cipal equations are computed in closed form by applying the MATLAB bvp4c method. The velocity and temperature pro-files, as well as the skin friction coefficient and Nusselt number, are discussed through graphs and tables for various flow parameters. The current simulations are suitable for the thermal flow processing of magnetic nanomaterials in the chemical engineering and metallurgy industries. From the results, it is noticed that the results of copper nanofluid have a better impact than those of aluminium nanofluid.
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Authors and Affiliations

Joel Mathews
1
Talla Hymavathi
2

  1. Dept. of Mathematics, Krishna University, Machilipatnam, 521 004, A.P, India
  2. Dept. of Mathematics, University College of Science and Technology, Adikavi Nannaya University, Rajamahendravaram, 533 296, A.P, India
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Abstract

The study of the geometry for worm-gearing is much more complicated than that of plane gearing, since worm-gearing is three-dimensional. A numerical method to determine the conjugate profile of worm-gearing tooth is developed. The software, with numerical set-up and graphic display, is an original and special program, and it could be adopted for the geometry of any kind of cylindrical worm-gearings, as well as for spur gearings and bevel gearings.
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Authors and Affiliations

Daniela Ghelase
Luiza Daschievici
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Abstract

Production and assessment of artillery firing tables (FT) are the key tasks in solving ballistic problems through both standard and non-standard firing conditions. According to the literature, two different standard firing table formats were developed by the former-Soviet and the United States armies. This study proposes the main difference between these FT formats, as the standard meteorological conditions. An accuracy assessment has been proposed to justify different sources of errors through modeling and production of such tables, including applied meteorological message, aiming angles round-off, linear superposition principle, and Earth approximation. A~case study has been proposed for the 155M107 projectile to demonstrate the impact of the Coriolis effect as well as other ballistic and atmospheric non-standard conditions. As a part of the construction of artillery FT, a fitting process has to be made between available firing data and simulations. Therefore, a parametric study is implemented to study the number of test elevations per charge needed through the fitting process and its corresponding production error. Hence, based on the number of test elevations available, the genetic algorithm (GA) has been utilized to obtain the test elevations order needed with minimum FT production error. The results show a good agreement with the data stated in the literature.
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Authors and Affiliations

Mostafa Khalil
1
ORCID: ORCID

  1. Aerospace Engineering Department, Military Technical College, Cairo, Egypt

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