bluuebunny/crossref_metadata_2025_split huggingface dataset:
Antibiogram, Haemolysis and Biofilm Properties of Escherichia coli from Bovine Mastitis
Authors: Naidu Leena , Sharda Rakesh , Chhabra Daljeet , Shukla Supriya , Audarya S.D. , Sikrodia Ravi , Gangil Rakhi 
Published: July 2022

Background: Escherichia coli cause mammary gland inflammation in dairy cows with striking local and sometimes severe systemic clinical symptoms. This disease affects many high producing cows in dairy herds and may cause several cases of death per year in the most severe cases. The present study was planned to evaluate the antibiogram and virulence factors of the isolated bacteria responsible for mastitis. Methods: In this study, 300 milk samples were collected and subjected to identify clinical mastitis (based on clinical symptoms) and sub clinical mastitis (using California mastitis test). E. coli was isolated and identified from mastitis positive samples and further tested for antibiogram and virulence factors such as haemolysis, biofilm formation and fimH and pap genes presence. Result: Out of 300 milk samples collected, 121 (40.33%) were positive for mastitis. E. coli was isolated from only 30 (24.79%) out of 121 mastitis positive samples. On Serotyping for somatic antigen, 13 E. coli isolates belonged to somatic serogroup O83, 2 to O157 and one each to O8, O20, O49, O119, O128 and O145. The highest sensitivity of E. coli isolates was recorded for ciprofloxacin, followed by gentamicin, tetracycline, nitrofurantoin, chloramphenicol, amikacin, cefixime, trimethoprim, ampicillin/sulbactam, ceftriaxone, cefoperazone, cefotaxime, kanamycin, cefotaxime/clavulanic acid and amoxycillin in the decreasing order. Multidrug resistance (MDR) was recorded in 96.66% of isolates. Out of 30 E. coli isolates, 46.66% were haemolytic and 40.0% positive for Congo red dye binding. Biofilm production was shown by 76.66% isolates. Molecular characterization revealed presence of fimH gene in 9 isolates, but pap gene was not detected in any of the strain. It may be concluded that E. coli is an emerging environmental mastitogen in cows and isolation of MDR strains with virulence factors is of serious concern.
Primary school teachers’ acceptance levels of educational technologies (Aida)
Authors: Elmira Uaidullakyzy , Duisengalievna Eskaraeva Aigul , Akgul Zhubandykova , Zhorabekovna Bekzhanova Bakytzhamal , Yntyk Balkhybekova , Meiramkul Kekilbekova 
Published: July 2022

The purpose of this research is to determine the acceptance level of primary school teachers about educational technologies. The research was designed in accordance with the qualitative research method. The study group of the research consists of 40 primary school teachers teaching in the city of Almaty, Kazakhstan, in the 2021–2022 academic year. Research data were collected with a semi-structured interview form developed by the researchers. The research data were converted into findings using the content analysis method. As a result of the research, it has been revealed that the majority of primary school teachers find themselves sufficient to benefit from educational technologies. However, the majority of the teachers who participated in the research stated that they sometimes use technology in education. The majority of primary school teachers participating in the research stated that technology-supported education is effective on students’ success. In this direction, in order to increase primary school teachers’ use of technology in education, it is recommended to establish infrastructures that will provide technology-supported education in schools and to organise in-service programmes for teachers.

Keywords: Educational technologies, primary school, teacher opinions;
STUDI PENERAPAN KETERAMPILAN PROSES SAINS POKOK BAHASAN GAYA PADA PERKULIAHAN FISIKA DASAR
Authors: Mabruroh Faizatul 
Published: July 2022

Penelitian ini bertujuan untuk mengetahui gambaran keterampilan proses sains (KPS) mahasiswa pada pokok bahasan gaya dan gambaran hasil belajar yang diperoleh setelah diterapakan pendekatan keterampilan proses sains. Metode yang digunakan dalam penelitian ini adalah penelitian deskriptif. Penelitian ini dilaksanakan pada perkuliahan semester ganjil tahun pelajaran 2017-2018. Teknik pengumpulan data yang digunakan adalah observasi, tes, dan dokumentasi. Observasi dilakukan saat kegiatan pratikum berlangsung. Tes diberikan setelah 5 kali pertemuan. Berdasarkan observasi gambaran keterampilan proses sains untuk keterampilan mengobservasi sebesar 82,20%, keterampilan mengukur sebesar 73,64%, keterampilan mengkomunikasikan data sebesar 53,36%, keterampilan mengklasifikasi sebesar 47,61%, keterampilan memprediksi sebesar 47,53%, dan keterampilan menyimpulkan 52,33%. Sedangkan gambaran hasil belajar fisika dengan menerapkan pendekatan keterampilan proses sains berdasarkan analisa data tes didapatkan rata-rata hasil belajar mahasiswa adalah 66,06.
PENINGKATAN PROFESIONALISME GURU MELALUI PENDAMPINGAN PEMBELAJARAN ONLINE BERBASIS LIVEBOARD BAGI GURU-GURU MGMP FISIKA KOTA PRABUMULIH
Authors: Ariska Melly , Kistiono Kistiono , Akhsan Hamdi , Cahyati Nilam , Fitriyani Fitriyani 
Published: July 2022

Guru-guru Fisika MGMP kota Prabumulih mengalami kesulitan dalam menyampaikan materi fisika yang bersifat matematis secara daring kepada siswa. Oleh karena itu, kami mengadakan pelatihan kepada guru-guru MGMP Fisika Prabumulih untuk mengenalkan pemanfaatan aplikasi LiveBoard yang dapat digunakan dalam membantu guru untuk menjelaskan materi fisika terkhususnya materi yang berkaitan dengan rumus/matematis dan memberikan pendampingan dalam pembuatan media belajar menggunakan aplikasi tersebut. Setelah diberikannya pelatihan selama kurang lebih 2 minggu, diperoleh hasil yang menunjukkan bahwa guru-guru MGMP Fisika Prabumulih mengalami peningkatan dalam segi pengetahuan dan keterampilan dalam membuat media mengajar menggunakan aplikasi LiveBoard. Hal ini didukung dengan perolehan nilai rata-rata posttest guru yang jauh lebih tinggi dibandingkan nilai rata-rata pretest.
The PENGARUH MODEL PEMBELAJARAN BERBASIS MASALAH TERINTEGRASI ISLAM TERHADAP HASIL BELAJAR FISIKA SISWA KELAS XI IPA I DI MA PUTRA AL-ISHLAHUDDINY KEDIRI LOMBOK BARAT
Authors: Bahari Lalu Pradipta Jaya 
Published: July 2022

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran berbasis masalah terintegrasi islam terhadap hasil belajar fisika siswa kelas XI IPA I di MA Putra Al-Ishlahuddiny Kediri Lombok Barat. Berdasarkan analisis data menggunakan Uji T pada kelas eksperimen dengan jumlah siswa sebanyak 19 orang dan 23 orang pada kelas control. Diperoleh thitung sebesar 5,06 dan ttabel sebesar 2.17 sehingga dapat disimpulkan bahwa thitung>ttabel maka ada pengaruh atau hipotesis diterima (Ha diterima). Oleh karena itu hasil penelitian ini menunjukan adanya pengaruh model pembelajaran berbasis masalah terintegrasi islam terhadap hasil belajar fisika siswa kelas XI IPA I di MA Putra Al-Ishlahuddiny Kediri Lombok Barat. Kelebihan dari model pembelajaran ini yakni dengan adanya ayat Al-Qur’an sebagai rujukan untuk mengambil permasalahan. Hal ini sangat cocok diterapkan kepada siswa yang memiliki latar belakang di pondok pesantren karena dengan model pembelajaran ini guru dapat menerapkan model pembelajaran yang lebih kreatif sehingga mampu meningkatkan minat belajar dari siswa.
BICOMPLEX ANALYSIS OF INVARIENT POWER SUPPLY SYSTEMS BASED ON RENEWABLE ENERGY SOURCES
Authors: Belenok N.V. , Chibelis V.I. , Spinul L.Yu 
Published: July 2022

The article considers a bicomplex calculation for calculating the invariant power supply systems based on renewable energy sources. Modern energy supply systems based on renewable energy sources have non-linear systems with complex transients and possible critical and chaotic regimes. The study of structures of hypernumerical systems, their features, methods of calculation and approximation of the elementary functions of a hypercomplex variable allows to effectively apply such systems in mathematical modelling of invariant power supply systems based on renewable energy sources. In some cases, the use of hypernumerical systems makes it possible to replace the original problem with an equivalent one, that is to build a bicomplex solution model.
The system of complex numbers was considered as the initial system. With recurrent doubling of the system, hypernumerical systems of different dimensions with different properties were obtained, which made it possible to assign different values to the products of imaginary units. It is proved that the introduction of additional conditions of commutativity and associativity, which apply to real numbers and imaginary units, allows to specify the choice of a hypernumerical system.
In the analysis of nonstationary processes of invariant systems and the study of the possibilities of hypernumerical systems, the expediency of choosing a bicomplex calculation method in mathematical modelling of systems with multiple modulation is substantiated. The method of bicomplex representation involves direct and inverse bicomplex transformation, which allows obtaining an analytically complete solution for the analysis of an invariant power supply system based on renewable energy sources. Examples of the use of bicomplex integral transformation for the analysis of systems with multiple modulation are considered. The application of the hypercomplex calculus apparatus for the transformation of systems of differential equations is proposed to simplify or compress them into one equation. It is shown that the use of hypercomplex calculus allows to significantly reduce the amount of processed information without reducing the informativeness of the mathematical model.
The proposed formulation of tasks in a hypercomplex view allowed to compress the processing information and obtain a compact vortex for the output signal.
ASSESSMENT OF RISK FOR THE INTEGRATION OF RENEWABLE ENERGY SOURCES INTO THE ELECTRICITY SUPPLY SYSTEM
Authors: Stepanenko V. , Zamulko A , Veremiichuk Y. , Nakhodov V. 
Published: July 2022

The work is devoted to the development of a methodology that allows combining qualitative and quantitative assessments of different risk factors to make an integrated decision when renewable energy sources connect to the electricity supply system. The integration of quantitative information and qualitatively presented knowledge through the creation of appropriate algorithms can significantly expand the possibilities of risk analysis of renewable energy sources, established energy systems and justification of measures to manage them.
The key features of large-scale and complex systems are the diversity and interdependence of the elements included in them, the large number of decision-makers in conditions of high uncertainty and the uniqueness of these objects. Therefore, the study describes the methods and approaches that can be used to analyze the risks of complex systems. In conditions of high uncertainty and complexity of large-scale systems, many solutions can be obtained by using qualitative assessments based on the knowledge and experience of experts.
Maintaining the reliability, stability and efficiency of the electrical system is becoming a difficult issue for distribution networks with variable energy resources. Further movement in the direction of increasing the share of solar power plants (SPP) in the generation of the power system is a great challenge for effective management of the distribution network and a serious threat to its normal functioning.
The article identifies the main factors that lead to the problems of integration of SPP. Also, the probability of occurrence and the level of possible consequences of the implementation of each of the identified risk factors were assessed by using the method of expert assessments.
According to the results of the study, the main problems in integrating SPP into the power supply system are increasing shunting power, deteriorating electricity quality, the need to modernize lines, increasing debt on the "green" tariff, higher harmonics and reactive power flow.
STATE AND PROSPECTS OF DEVELOPMENT OF LOCAL ENERGY OBJECTS WITHIN MICROGRIDS
Authors: Khotian A. , Rozen V. 
Published: July 2022

Goal. Clarify the definition of the term "local energy object", by disclosing its essence and content in the energy network. To find out the strategic directions necessary for the development and dissemination of energy innovations in Ukraine with the participation of microgrids.
Task. Analyze and establish requirements for determining the term of a local energy object, develop a classification of energy objects according to different classification criteria. Justify the importance and essence of local energy objects in the power grid. Conduct a comprehensive assessment and analysis of the advantages and disadvantages of microgrids through the use of SWOT - analysis methodologies.
The result of the study. The article proposes and formulates the definition of the term of the local energy object. The classification of objects is developed by such categorical features as: economic - geographical position, functional purpose, power supply mode, criterion of effective management, method of management, type of performed task, parameter of electric energy consumption (power, type of current), size of object, human influence, form of ownership, category of electric receivers. The advantages and disadvantages, as well as opportunities and threats to the development of power supply of local objects as part of microgrids are presented. SWOT analysis methodology was used to conduct analytical research (analysis).
Scientific novelty consists in the introduction into scientific circulation of a new term, such as "local energy object", as well as in the disclosure of its essence, content and meaning.
Conclusions and practical significance. The definition of the term "local energy object" is clarified, its essence, content and meaning in the composition of energy networks are revealed, which helps to characterize the main subjects of energy. The strategic directions necessary for the development and dissemination of energy innovations in Ukraine in the long run are provided.
COMPARATIVE ANALYSIS OF TECHNOLOGIES OF JET FUEL PRODUCTION FROM ALCOHOLS
Authors: Boichenko S. , Yakovlieva A. , Bodnar D. , Hudz A. , Moskovchuk M. , Loriia M. 
Published: July 2022

The article considers the question of competitive ability of technologies of alternative aviation fuels production and its application in modern transport sector that develops quickly. Modern tendencies in transport sphere concerning the necessity of transition from conventional oil-derived fuel to alternative one for both road and air transport are considered in the article. These tendencies are explained by the limitation of crude oil deposits, from one side and worsening of the state of environment caused by exhaust gases emissions from another side. Moreover, international aviation authorities, such ICAO, IATA determine the necessity of active development and implementation of alternative aviation fuels. The article analyzes variety of available today renewable feedstock and technological processes of its processing, which are used today for production of alternative aviation fuels. Peculiarities of direct ethanol use in blends with motor fuels are shown and necessity of its chemical conversion for use in jet fuels is substantiated. The comparative analysis of characteristics of technological processes of alternative jet fuels production based on biomass was done. Processes of alcohols (ethanol, n-butanol and iso-butanol) production from renewable plant feedstock and processes of its further conversion to alternative jet fuel are considered. Two methods of ethanol production (petrochemical and biochemical) were shown and analyzed; advantages and disadvantages of both methods were presented.
It was shown that today application of alternative aviation fuels produced from alcohols is allowed in blends with conventional oil-derived jet fuels in quantity up to 50 %.
DRONE POSITIONING SYSTEMS THAT USE DIGITAL CAMERAS
Authors: Averin Dmytro , Borovytsky Volodymyr , Mykytenko Volodymyr 
Published: July 2022

Unmanned aerial vehicles are very important in everyday life. Their number is increasing every day, as well as the scope of their use. Therefore, it becomes necessary to automate their flight from departure to kindergarten. During automatic flight, drones have certain problems during takeoff, landing and positioning. The problem is that when landing and taking off, it is necessary to ensure high positioning accuracy, which is impossible when using GPS, as it can provide accuracy of only a few meters, which is not enough, and the use of operators is accurate, but this method requires the use of quality cameras with stabilization. These stabilization cameras are very heavy, so the payload of drones is reduced, and they are very expensive (usually more expensive than the drone itself). Also, the use of operators during landing and departure can lead to a catastrophe due to human factors. The task of this article is to create a classification table, analyze landing methods, assess their advantages and disadvantages, give recommendations for the use of the most effective positioning system, as well as the development of new positioning methods.
In the course of work modern, and also the most widespread methods of positioning were considered, the critical analysis of robots is made. As a result, it was proposed to classify drone positioning systems that provide reliable takeoff, landing and delivery of goods using digital cameras. This classification includes all combinations of digital cameras and radiation sources that can be located both on the drone and on the landing or cargo delivery area. Examples are given for each combination proposed in the classification. A thorough analysis of the advantages and disadvantages of each configuration of digital cameras and radiation sources is given. Recommendations for choosing the best drone positioning system are provided. The main disadvantages of these systems are the complexity of algorithms, which makes systems more expensive, as well as complicates the creation of the system, which does not preclude the possibility of making a mistake when creating a system. And this can lead to an accident. All DPSs can be classified on group depending on the number of digital cameras, number and shape of reference light sources, locations of digital cameras and location of the light sources. From the point of reliability and economy the best DPS should include one camera on a drone and a minimal set of reference light sources on the ground. The authors suppose that three reference light sources that specify a triangle is the best choice because it makes possible estimation of the distance and angular coordinates of the landing pad.
APPLICATION OF THREE-WAVE HETERODINE INTERFEROMETRY FOR NANORIZED LAYERS THICKNESS MEASUREMENT IN THE PROCESS OF THEIR DEPOSITION
Authors: Lendiel Vasyl , Stepakhno Iryna , Yarovoi Leonid 
Published: July 2022

The paper proposes a new method of current measurement of the layer thickness of optical films in the process of their forming, in particular, by the method of vacuum deposition. Such films, among other things, are used to create a variety of optoelectronic devices and optical nanosensors for laboratory research in the chemical and pharmaceutical industries, for environmental monitoring.
We propose a method for measuring the phase of a laser beam, which is based on heterodyne interferometry. The method of heterodyne interferometry in comparison with ordinary interference methods provides better S/N ration results due to the transfer of the investigated signal from the low frequency domain to heterodyne frequency. Our proposed approach is the three-wave heterodyne interferometry (TGI), otherwise - TWI (three waves interference). The TGI method is designed to critically increase the sensitivity to small amplitudes of laser Doppler vibrometers and increase their noise resistance. In interference gauges of optical film thickness, in refractometers, and in many other film thickness gauges as well as in laser Doppler vibrometers the investigated parameter is the phase shift of probing optical radiation. Therefore, the developments of TGI in laser Doppler vibrometers can be used to measure the phase shift.
The analysis of the new method on mathematical model of TGI was provided. We have got the relations of the output signal of a three-wave heterodyne interferometer dependence on the phase shift , as well as on the thickness of optical films and on their refractive index. The simulation results show that for the optoelectronic equipment that provides with an error of up to 10 %, the absolute error of phase shift measurement, compared to the classical heterodyne interferometer, can be reduced to 103 times. The same results applies to the thickness of the optical coating layer.
The paper also analyzes the results of experiments on the use of TGI in laser vibrometers and shows that they indicate the possibility of measuring the phase of optical radiation up to 10-5. The disadvantage of the proposed method is its non-linearity and, as a result, a limited linear range. Ways of extending the linear range are discussed.
Rupture Behavior of the Litang Fault within the Sichuan-Yunnan Active Block, Southeastern Tibetan Plateau
Authors: Gao Shuaipo , Chen Lichun , Li Yanbao , Wang Hu , Han Mingming , Feng Jiahui , Lu Lili , Peng Sanxi , Jin Chao , Liu Langtao 
Published: July 2022

AbstractIn mainland China, approximately 86% of M≥7 earthquakes have occurred in the block boundary zone, which has been well explained by active block theory. However, a few large earthquakes have occurred within the active block, which provides us with an opportunity to better study the deformation of the Tibetan Plateau. The Litang Fault (LTF) is a strike-slip fault within the Sichuan-Yunnan Active Block and produced the 1948 Litang M7.3 earthquake. We presented the Holocene rupture behavior of the LTF based on detailed field investigations, paleoearthquake trenching, and radiocarbon dating. Specifically, we revealed 13 Holocene paleoearthquake events at four trenching sites and divided these events into 3 rupture cycles at the whole-fault scale. The seismic rupture behavior of the LTF is characterized by recurrent southeastward migration, and since the Holocene, the period of each rupture cycle has decreased rapidly from 8000 years to 500 years. Our results may provide geologic evidence for understanding the intrablock stress patterns and material transfer of the southeastern region of the Tibetan Plateau. The rapidly enhanced fault activity of the LTF since the late Holocene indicates that the LTF may have played an important role in accommodating the deformation of the southeastern region of the Tibetan Plateau.