bluuebunny/crossref_metadata_2025_split huggingface dataset:
The random and the non-random in intra-individual L2 variation
Authors: Singleton David 
Published: March 2021

AbstractWhen intra-individual variation in language use is discussed it tends to be seen as not having much significance. The recognizability of the relation of variants to each other is (usually tacitly) acknowledged; intra-individual variation is often attributed to influence across different varieties of the language in question (and, in L2 variation, also across languages); in addition such variation is frequently seen as a concomitant of the way in which the given linguistic feature develops. None of these commentaries actually has much to do withrandomness; all seem to relate to identifiable complexes of correlation. The present article begins by exploring how the concept of randomness is to be understood and defined. It proceeds to explore the relationship of intra-individual linguistic variation to the recognizability of the connections between variables, to cross-varietal influence and to acquisitional trajectories. It probes the question of whether, in the light of theputativelyexplanatory factors for intra-individual variation considered, much room remains for its treatment as straightforwardly random.
Politischer Reformprozess im Zuge der COVID-19-Pandemie: Der Pakt für den Öffentlichen Gesundheitsdienst
Authors: Arnold Laura , Teichert Ute 
Published: March 2021

Zusammenfassung
Im Zuge eines Konjunkturpaketes haben sich Bund und Länder auf einen 4 Milliarden Euro schweren Pakt für den Öffentlichen Gesundheitsdienst (ÖGD) verständigt, um den ÖGD personell wie infrastrukturell zu stärken. Eine zentrale Rolle spielt die nachhaltige Stärkung des ÖGD zur Sicherstellung gesundheitlicher Schutzaufgaben zur Krisenbewältigung. Damit der ÖGD die ihm obliegende komplexe Aufgabe der gesundheitlichen Daseinsfürsorge vor Ort langfristig und qualitativ hochwertig ausfüllen kann, wird es notwendig sein, bestehende Strukturen zu optimieren, so dass akute Bedrohungssituationen ebenso wie eher langfristig und strategisch ausgerichtete Planungsaufgaben souverän gemeistert werden können.
Designing a system to synchronize the input signal in a telecommunication network under the condition for reducing a transitional component of the phase error
Authors: Berkman Liubov , Tkachenko Olga , Turovsky Oleksandr , Fokin Vaceslav , Strelnikov Vitaliy 
Published: March 2021

The quality of reception, as well as the processing and demodulation of the input signal in the telecommunication systems' networks, are closely related to the quality indicators in the functioning of one of the subsystems of these networks, namely a phase synchronization system. This work has directly considered the issues related to improving the performance and reducing the transitional component of the phase error generated by transition processes in the combined synchronization system. A mathematical model has been built that makes it possible to synthesize a disrupted link in the synchronization system of a telecommunication network meeting the condition for a decrease in the transitional component of the phase error. It is shown that a simple disrupted link, synthesized under the condition of suppressing a slow-fading transition component, makes it possible to shorten the time of the transition process in the system while maintaining the initial order of astatism. When a complex link is synthesized, the transition process becomes oscillatory.
It was established that under the conditions of a phase jump or a frequency jump, it is possible to improve the dynamics of the system and reduce the transitional component of the phase error variance by making the parameters for the disrupted communication link influence the roots of the characteristic equation of the transition process. The features in synthesizing disrupted communication have been considered for the intervals of movement corresponding to areas with the positive and negative inclination of the phase discriminator's static characteristic. Such conditions have been devised that make it possible to determine the value and sign of the root in the characteristic equation of the transition process, which is introduced by the parameter of a disrupted communication link separately for areas of the stable and non-steady movement of the phase discriminator's static characteristic. The reported mathematical model of disrupted link synthesis has made it possible to derive reference results. They indicated that in order to suppress the slowly fading component of the phase error characteristic equation to "0", it is necessary to provide for a significant advantage, up to 10 times, of the roots introduced by the disrupted communication link over the roots of the specified component. By changing the value for a disrupted communication parameter, one can significantly, up to 5 times or larger, shorten the time of the transition process in the combined synchronization system at a simultaneous decrease of 18‒25 % in the initial value of the transition error
Research and development of the structure of a vortex heat generator by the method of mathematical modeling
Authors: Yaris Vadim , Kuzyayev Ivan , Nikolsky Valeriy , Ved Viktor , Peter Chlens , Palagnyuk Andrii , Lobodenko Antonina , Reshetnyak Iryna 
Published: March 2021

The object of research is a mathematical model of a new design of a vortex heat generator with translational-rotational flow in a variable geometry working space.
One of the most problematic areas in the development of new and promising designs of heat generators by the method of physical modeling is the search for its optimal operating-technological and instrumental-design parameters. The implementation of a preliminary analysis of such structures by the method of mathematical modeling will significantly reduce the time and material costs for the development of promising designs of heat generators.
The studies of the design of the new vortex heat generator, carried out by the method of mathematical modeling, made it possible to determine the range of its operation, to evaluate the operating-technological and hardware-design parameters that affect the efficiency of work. Studies of the hydrodynamics of the translational-rotational motion of a viscous fluid flow in the working space of a new vortex heat generator with a variable geometry of the working space made it possible to determine the critical velocity and pressure, the influence of the geometric parameters of the device on the generation of vortices that promote cavitation. Model studies were carried out in the range of fluid load changes in the range from 0.001 m3/s to 0.01 m3/s. The study of changes in the velocity field in the channels was carried out for the geometry of the channel with a taper angle from 0° to 25°. The width of the working channel of the space Wn varied in the range of 130, 70 and 40 mm.
It has been established that a good axial symmetry and smoothness of the coolant flow in the vortex zone along the swirler screw provides the coolant inlet through a nozzle with a rectangular cross-section. The dependence of the influence of the flow area of the nozzle for introducing the coolant into the vortex zone on the energy efficiency of the vortex apparatus as a whole is found experimentally.
The research carried out makes it possible to design vortex heat generators with geometric parameters that meet modern energy efficiency requirements. The geometry of the swirler screw is determined, which increases the efficiency of the heat generator by 35 % in comparison with similar designs of vortex heat generators given in the literature.
Study of dust collection effectiveness in cyclonic-vortex action apparatus
Authors: Torsky Andrei , Volnenko Alexander , Plyatsuk Leonid , Hurets Larysa , Zhumadullayev Daulet , Abzhabparov Аbay 
Published: March 2021

The object of research is the efficiency of dust collection of fine dust in an apparatus with an intense turbulent mode of phase interaction. One of the most problematic areas of the existing dust and gas cleaning equipment is the low efficiency of collecting fine dust. Effective cleaning of exhaust gases from dust involves the use of multi-stage cleaning systems, including wet and dry dust cleaning devices, which entails high capital and operating costs. These disadvantages are eliminated in the developed design of the cyclone-vortex dust collector with two contact zones. The device implements both dry and wet dust collection mechanisms, which allows for high efficiency of dust removal at high productivity.
The conducted studies of the total and fractional efficiency of dust collection when changing the operating parameters of the developed device showed that the efficiency of collecting fine dust is 98–99 %. The increase in the efficiency of dust collection in the dry stage of the device is due to an increase in centrifugal force. In the wet stage of contact, the efficiency reaches its maximum values due to the vortex crushing of the liquid in the nozzle zone of the apparatus. Studies of the fractional efficiency of the apparatus show that with an increase in the diameter of the captured particles, the efficiency of the dust collection process for dry and wet stages, as well as the overall efficiency, increases. With an increase in the density of irrigation, the overall efficiency of dust collection in the apparatus increases. It has been established that an increase in the efficiency of capturing highly dispersed particles occurs due to turbulent diffusion, the value of which is determined by the frequency of turbulent pulsations and the degree of entrainment of particles during the pulsating motion of packed bodies. To describe the results obtained, a centrifugal-inertial model for a dry contact stage and a turbulent-diffusion model of solid particle deposition for a wet contact stage are proposed, which make it possible to calculate the dust collection efficiency of the contact stages, as well as the overall efficiency of the cyclone-vortex apparatus.
The results obtained show the prospects of using devices of this design at heat power plants and other industries.
Analysis of the directions for improving the development systems for oil fields at the later stage
Authors: Doroshenko Volodymyr , Titlov Oleksandr 
Published: March 2021

The object of research is oil fields at a late stage of their development. The most problematic issues in the development of oil fields are the formation and withdrawal of residual oil reserves. This problem is especially acute at the late or final stage, when the oil productivity of the wells decreases and the water cut of the production catastrophically increases. The most acceptable development system in such conditions is the use of methods for increasing oil recovery and, first of all, by injecting water into the reservoir. At the same time, the problematic issue is the lack of reliable information on the paths of water movement from injection to production wells and the imperfection of methods for aligning the injectivity profile in injection wells and the flow profile in production wells.
In the course of the study, statistically analytical methods were used to analyze the state of development of oil fields at a late stage and industrial approbation of methods for tracing water movement and substantiation of a reagent base to align the paths of water movement and oil inflow.
A set of reagents and technological methods for ensuring the regulation of the process of flooding of oil fields at a late stage of their development have been investigated and developed. It has been proven that a promising direction is the injection of a 0.1 % aqueous solution of the Polycar polymer together with water. This solution first of all penetrates into highly permeable, water-washed, formation intervals, contributing to the leveling of the injectivity profile, reducing the water cut of surrounding production wells and increasing their oil productivity.
Thanks to the research carried out, directions and means of improving the systems of field development at a later stage have been developed by organizing targeted (selective) waterflooding of oil deposits based on high-quality and comprehensive control of the movement of filtration flows in the reservoir. This will ultimately contribute to achieving and maintaining the design value of reservoir pressure, preventing a decrease in the rate of decline in oil production, obtaining the design value of the sweep efficiency by waterflooding, and withdrawing residual oil reserves.
Simulation of impulse current generator for testing surge arresters using frequency-dependent models
Authors: Trotsenko Yevgeniy , Brzhezitsky Volodymyr , Protsenko Olexandr , Haran Yaroslav 
Published: March 2021

The object of research is the equivalent circuit of an impulse current generator designed for testing surge arresters. Calculation of the impulse current generator parameters when discharging a capacitor bank to a complex nonlinear load is a difficult task for an analytical solution. Until now, the application of surge arrester frequency-dependent models was limited to the problems of overvoltage computation. Surge arrester frequency-dependent models can predict the residual voltage with high accuracy. This is the reason to consider that surge arrester frequency-dependent models can be used for calculating the main parameters of impulse current generators designed for physical testing of surge arresters.
The task of determining the equivalent circuit parameters required for getting a discharge current of a given waveform and amplitude in an impulse current generator scheme with a nonlinear load was solved using circuit simulation.
This article presents the results of studying the processes in impulse current generator equivalent circuit. In the circuit a dynamic model of a surge arrester is used as the load model. For this, an equivalent circuit for the discharge path of the impulse current generator was drawn up. The parameters of the circuit elements (including the required number of capacitors and their charging voltage) are determined, which are necessary for getting a discharge current of a given standardized waveform and amplitude. The parameters of the discharge path are determined for surge arresters of three different voltage classes. It was found that the relative error when determining the residual voltage between the terminals of the surge arrester model does not exceed 3 %.
The work contributes to the further development of circuit simulation of surge arresters and the expansion of the scope of surge arrester dynamic models. As a result of the research performed, the possibility of using surge arrester frequency-dependent models for determining the discharge current waveform in impulse current generators is shown. The research performed is relevant due to the fact that surge arresters have become a main tool for protecting the insulation of electrical network equipment against external and internal overvoltages
Constraints and Management Practices of Dairy Farming during COVID-19 Pandemic Situation
Authors: Saravanan K.P. , Silambarasan P. , Manivannan A. , Sasikala V. , Sivakumar T. 
Published: March 2021

Background: The COVID-19 pandemic and subsequent lockdown have created unprecedented emergency and sudden distress on all sectors in India including the livestock sector. Among livestock sectors, dairy farming is more sensitive due to the handling of an essential and perishable commodity of milk. Methods: Under this pandemic situation, the aim of the study to know the constraints confronted and management practices followed by dairy farmers during the COVID-19 pandemic situation. The study was conducted in July 2020 in Cuddalore district of Tamil Nadu. Thirty dairy farmers were selected randomly and data were collected by a personal interview method through a well-structured interview schedule. Socio-economic data were analyzed by statistical methods viz. percentage, mean and standard deviation. Constraints of dairy farming were analyzed and ranked by Mean Weighed Score method and percentage analysis was used for analyzing and ranking management practices. Result: Socio-economic characterstics revealed that more than 86.66 per cent of dairy farmers were belonged low to medium groups and utilized different mass media tools for retrieving information. The constraints analysis revealed that high cost of concentrate feed foremost constraint with Mean Weighed Score of 50.00 were ranked first. Dairy farmers expressed difficultly in the procurement of concentrate, shortage of wheat bran supply and elevated wheat bran cost (MWS 44.44) second important constraints. Dairy farmer’s made alterations in the concentrate feed composition, consulted veterinary doctors over the phone and direct selling of milk as management practices to manage the pandemic situation.
PELABELAN TOTAL TAK-AJAIB SISI PADA MULTISTAR
Authors: Prasetyo Arif Budi , Kusuma Yoga Jati 
Published: March 2021

Graph theory contains several topics, one of which will be discussed in this study is graph labeling. In the topic of labeling, the graph used is a limited, simple, and undirected graph. In this study, the type of labeling used is total labeling. The multistar graph used in this study is a combination of star graphs whose center vertex are not connected to each other. This research uses literature research method which is divided into two parts, that is the basic calculation to determine the boundary of the first term a and the difference d from the (a,d) edge antimagic total labeling on the mS_n multistar graph. The second part is to apply (a,d) edge antimagic total labeling to the multistar graph mS_n. Further result shown on conclusion. Teori graf memuat beberapa topik, salah satu yang akan dibahas dalam penelitian ini adalah pelabelan graf. Dalam topik pelabelan, graf yang digunakan merupakan graf terbatas, sederhana, dan tak berarah. Dalam penelitian ini, jenis pelabelan yang digunakan adalah pelabelan total. Graf multistar yang digunakan dalam penelitian ini merupakan gabungan graf star yang titik pusatnya tidak saling terhubung. Penelitian ini menggunakan metode penelitian pustaka yang dibagi menjadi dua bagian, yakni perhitungan dasar untuk menentukan batas suku pertama a dan beda d dari pelabelan total tak-ajaib sisi (a,d) pada graf multistar mS_n. Bagian yang kedua adalah keberlakukan pelabelan total tak-ajaib sisi (a,d) pada graf multistar mS_n. Hasil lebih lanjut dijelaskan pada bagian kesimpulan.
Analisis Glukosa Ikan Gelodok (Periopthalmodon schlosseri) di Perairan Desa Tanipah dan Desa Kuala Lupak, Barito Kuala Kalimantan Selatan
Authors: Rinowati Dewita , Hidayaturrahmah Hidayaturrahmah 
Published: March 2021

Sumber energi dan biomarker terhadap kondisi fisiologis ikan dipengaruhi oleh faktor kadar glukosa darah. Penelitian ini bertujuan untuk mengetahui profil glukosa pada ikan gelodok (Periopthalmodon schlosseri) di Desa Tanipah dan Desa Kuala Lupak, Kabupaten Barito Kuala sebagai sumber pengetahuan. Metode yang digunakan adalah GOD-PAP yaitu penetapan glukosa darah dari sampel serum dan plasma secara enzimatik menggunakan Glukosa Oksidase Para Amino Phenazone menghasilkan warna merah yang diukur dengan fotometer. Hasil yang didapatkan kadar glukosa rata-rata ikan gelodok dari pengambilan Desa Tanipah didapatkan 45,87 ± 13,6 mg/dL Pengambilan di Desa Kuala Lupak rata-rata kadar glukosa sebesar 49,75 ± 27,6 mg/dL. Glukosa ikan gelodok yang didapatkan dari kedua desa tersebut berada dibatas normal kadar glukosa darah pada ikan. Kata Kunci: Glukosa, darah, ikan gelodok, GOD-PAP, glikogen Energy sources and biomarkers of fish physiological conditions are influenced by blood glucose levels. This study aimed to determine the glucose profile of the jellyfish (Periopthalmodon schlosseri) in Tanipah Village and Kuala Lupak Village, Barito Kuala Regency as a source of knowledge. The method used is GOD-PAP namely the determination of blood glucose from serum and plasma samples enzymatically using Glucose Oxidase The Amino Phenazone produces a red color as measured by a photometer. The results obtained by the average level of glucose in Mudskipper from the taking of Tanipah Village were 45.87 ± 13.6. Taking in the village of Kuala Lupak the average glucose level was 49.75 ± 27.6 mg / dL. Mudskipper fish glucose obtained from the two villages is within the normal limits of blood glucose levels in fish.
Usp41, a Potential Candidate Gene in Development of Breast Cancer
Authors: ling rui , Huang Meiling , Zhang Jian , Xiao Jingjing , Li Nanlin 
Published: March 2021

Abstract
Background: Breast cancer is the most common cancer diagnosed among women and is the second leading cause of cancer death. It is of great significance to explore potential candidate targets. Methods: Cell function assays, siRNA, western blot, mass spectrum, flow cytometry, and other molecular biology techniques were conducted to verify the function of USP41 to breast cancer cell line. Results: The results indicate that USP41 (ubiquitin-specific proteases 41) expression is positively related to breast cancer progression. USP41 overexpression greatly enhanced breast cancer colony-forming ability, proliferation and migration. In contrast, USP41 knockdown significantly inhibited breast cancer colony-forming ability, proliferation and migration. Moreover, association of USP41 with RACK1 (Receptor for activated C kinase 1) was proved by mass spectrum, indicating its potential role in TGF-β signaling. Conclusions: USP41 can be a potential therapeutic target against breast cancer via RACK1.
Two-component vasopressor therapy for septic shock
Authors: Kochkin A. A. , Likhvantsev V. V. , Kadantseva К. К. 
Published: March 2021

The objective: to investigate the efficacy and safety of terlipressin when it is used as an additional vasopressor in septic shock.Subjects: A single-center, observational, retrospective-prospective study of the efficacy and safety of combined therapy of septic shock with norepinephrine and terlipressin versus monotherapy with norepinephrine was conducted.Results. The use of terlipressin made it possible to reduce the average daily need for noradrenaline in patients with septic shock from 0.68 μg · kg-1 · min-1 in the control group to 0.55 μg · kg-1 · min-1 in the study group (p = 0.015) and reduce the duration of vasopressor support from 8 days [6.0-11.0] to 6 days [5.0-8.0] in the study group (p = 0.023). The use of terlipressin did not reduce the need for mechanical ventilation, but it did reduce the duration of ventilation. The number of days free from mechanical ventilation in patients in the control group was 6.0 [1.0-18.0], in the study group - 16.0 [2.0-22.0], (p = 0.039).Conclusion. The use of terlipressin as a supplement to norepinephrine is an effective and relatively safe treatment for hypotension in refractory septic shock.
La docencia en lengua inglesa en los planes de estudio universitario: revisión jurídico-normativa de su implementación en el Grado en Derecho de la Universidad de Málaga y apuntes para configurar la asignatura Derecho del Trabajo y de la Seguridad Social
Authors: Salas Porras María 
Published: March 2021

El trabajo que de seguida se presenta, a la postre busca ofrecer un ejemplo práctico de la implementación de docencia en lengua inglesa en una concreta asignatura, la que tiene como finalidad acercar el Derecho del Trabajo y la Seguridad Social a los alumnos del Grado en Derecho.
La circunscripción obligatoria al Plan de Estudios que ampara el diseño del programa de la citada asignatura justifica que hayamos hecho referencia a una específica realidad, la de la Universidad de Málaga, si bien la explicación teórico-jurídica de la introducción del inglés como lengua vehicular en la docencia universitaria española, bien podría ser exportable a cualquier otra Universidad pública de nuestro país.