bluuebunny/crossref_metadata_2025_split huggingface dataset:
Placenta Previa Accreta Spectrum: Cesarean Hysterectomy
Authors: Takeda Satoru , Takeda Jun , Murayama Yoshihiko 
Published: May 2021

AbstractWhen cesarean hysterectomy is scheduled in cases of placenta previa accreta/increta/percreta, it is necessary that the departments of obstetrics, anesthesiology, blood transfusion, urology, and radiology hold a preoperative conference to assure full preparation for the surgery. A ureteral stent inserted just before cesarean section serves as a marker. A uterine incision should be made at a site free of placental contact. The presence/absence of bladder invasion by villi, adhesions, and the degree of vascularization greatly influence the amount of bleeding, and bleeding control is a key point. For prevention of massive hemorrhage, methods of blood flow blockage, such as balloon occlusion catheterization of the aorta or common iliac artery, should be considered. Stored autologous blood and Cell Saver should be prepared. When hysterectomy is performed with the placenta left in situ, handling of the elongated cardinal ligament, ureteric injury, and bladder injury are important issues because the lower uterine segment is enlarged with the placenta. If blood flow is not blocked, separation of the bladder at the area of placenta percreta should be performed as the last step, to reduce bleeding (Pelosi's method). At this time, after handling of the cardinal ligament, bladder separation can be performed more safely if the posterior vaginal wall is incised and exposed first.In cases of placenta accreta or partial placenta accreta/increta/percreta, a diagnosis of morbidly adherent placenta may not be obtained until separation of the placenta is performed. If bleeding from the placental separation surface cannot be controlled, total hysterectomy should be performed without hesitation.
Additively manufactured electrodes for plasma and power-flow studies in high-power transmission lines on the 1-MA MAIZE facility
Authors: Smith T. J. , Campbell P. C. , Dowhan G. V. , Jordan N. M. , Johnston M. D. , Cuneo M. E. , Laity G. R. , McBride R. D. 
Published: May 2021

Power-flow studies on the 30-MA, 100-ns Z facility at Sandia National Laboratories have shown that plasmas in the facility’s magnetically insulated transmission lines (MITLs) and double post-hole convolute can result in a loss of current delivered to the load. To study power-flow physics on the 1-MA, 100-ns MAIZE facility at the University of Michigan, planar MITL loads and planar post-hole convolute loads have been developed that extend into the lines of sight for various imaging diagnostics on MAIZE. These loads use 3D-printed dielectric support structures lined with thin foils of either aluminum or stainless steel. The metal foils serve as the current-carrying power-flow surfaces, which generate plasma during the current pulse. The foil thickness (50 µm) and widths (11.5–16 mm) are selected to ensure a sufficient linear current density (0.5–0.7 MA/cm) for plasma formation. Laser backlighting (532 nm) and visible-light self-emission imaging capture the overall plasma evolution in the anode–cathode gaps, including the gap closure velocities (1–4 cm/μs).
Ab initio molecular dynamics study on energy relaxation path of hydrogen-bonded OH vibration in bulk water
Authors: Ishiyama Tatsuya 
Published: May 2021

The vibrational energy relaxation paths of hydrogen-bonded (H-bonded) OH excited in pure water and in isotopically diluted (deuterated) water are elucidated via non-equilibrium ab initio molecular dynamics (NE-AIMD) simulations. The present study extends the previous NE-AIMD simulation for the energy relaxation of an excited free OH vibration at an air/water interface [T. Ishiyama, J. Chem. Phys. 154, 104708 (2021)] to the energy relaxation of an excited H-bonded OH vibration in bulk water. The present simulation shows that the excited OH vibration in pure water dissipates its energy on a timescale of 0.1 ps, whereas that in deuterated water relaxes on a timescale of 0.7 ps, consistent with the experimental observations. To decompose these relaxation energies into the components due to intramolecular and intermolecular couplings, constraints are introduced on the vibrational modes except for the target path in the NE-AIMD simulation. In the case of pure water, 80% of the total relaxation is attributed to the pathway due to the resonant intermolecular OH⋯OH stretch coupling, and the remaining 17% and 3% are attributed to intramolecular couplings with the bend overtone and with the conjugate OH stretch, respectively. This result strongly supports a significant role for the Förster transfer mechanism of pure water due to the intermolecular dipole–dipole interactions. In the case of deuterated water, on the other hand, 36% of the total relaxation is due to the intermolecular stretch coupling, and all the remaining 64% arises from coupling with the intramolecular bend overtone.
Single-mode characteristic of a supermode microcavity Raman laser
Authors: Zhang Pei-Ji , Ji Qing-Xin , Cao Qi-Tao , Wang Heming , Liu Wenjing , Gong Qihuang , Xiao Yun-Feng 
Published: May 2021

Significance
Microlasers in near-degenerate supermodes play a pivotal role for studies of non-Hermitian physics, novel light sources, and advanced sensors. However, the widely observed beating phenomena and the single-mode nature of the stimulated scattering have been generating the lasing characteristic dilemma. In this article, we experimentally elucidate the lasing spectral paradox by investigating the lasing dynamics of supermode Raman microlasers. The single-mode lasing behavior is confirmed, and the beating signal has been recognized as the transient interference during the lasing switching between the supermodes with the help of the self-injection technique. This work provides an insightful guidance for microlaser-based precision measurements and paves the way to reconfigurable light sources.
Partner language development in TWI
Authors: Navejas Dawn 
Published: May 2021

Abstract
Prior research has sought to describe how teachers view and approach attention to partner language (PL)
development in Spanish immersion settings (Cammarata & Tedick, 2012; Fortune et al., 2008; Lindholm-Leary, 2001;
Walker & Tedick, 2000). However, it has not focused specifically on the
particularities of two-way immersion (TWI), which is unique for its inclusion of both heritage speakers and second language
learners. The current project adds to existing knowledge by using teacher interviews and a survey to report a qualitative case
study of three TWI teachers’ beliefs and practices. Data is triangulated through PL student testing and analysis of classroom
observations. Results confirm many of the findings of prior research, especially regarding teachers’ perceived need for increased
guidance and resources. They also provide insight into how TWI teachers view PL development in the two groups of learners.
Implications for teacher training and future research are discussed.
On norms and taboo
Authors: Xavier Catarina 
Published: May 2021

Abstract
Within Audiovisual Translation Studies, many studies have been dedicated to the subtitling of taboo words. Most of this research has been restricted to quantitative and qualitative data about translation strategies, with comparably less attention given to translation norms. As norms cannot be directly observed, their investigation raises methodological challenges for empirical studies. This paper proposes a model for the investigation of translation norms by triangulating data on observed regularities in the English to Portuguese subtitling of taboo words in a corpus of movies broadcast on Portuguese FTA (free-to-air, open-signal) television between 2001 and 2015, with questionnaire data on subtitlers’ attitudes towards the subtitling of taboo words on television. The results enable the identification of the most frequent subtitling strategies, their possible motivations, and the relevance of two contextual variables (time period and channel typology). Using the results, a (potential) norm regarding the subtitling of taboo words in Portugal is formulated. However, some of the data, both textual and extratextual, raise the question of whether there is also a competing norm at play.
Sesamia cretica (greater sugarcane borer).
Authors: Maes Koen 
Published: May 2021

Abstract

The geographical range of S. cretica includes most of the countries and islands of the Mediterranean basin and extends through the Middle East and Arabia to Pakistan, northern India and northern Africa, extending south to northern Kenya and northern Cameroon. According to Tams and Bowden (1953) this species does not extend westward of Cameroon; however, earlier records from Mali, Niger and Togo have again been included on the recently revised CABI/EPPO (2001) distribution map. This is a pest species linked to graminaceous crops with a preference for sorghum, maize and sugarcane. It is present on wild Gramineae with a preference for Panicum repens. S. cretica could extend its range following these crops/wild hosts and in correlation with climatic change. More studies on the distribution of this species are necessary. It belongs to the 'Sesamia' group of noctuids, a group of very similar species that are difficult to identify, and therefore misidentifications can occur regarding new distribution data.
Coercivity in the Mg-doped CeCo3 permanent magnet: grain size and anisotropy variation effects
Authors: Guan Weizheng , Zhang Zhengming , Wang Dunhui , Du Youwei 
Published: May 2021

Abstract
Understanding the microstructure–coercivity relationship is essential not only because of its theoretical significance, but also for the application value of designing high performance magnets. As one of the latest found permanent magnets, Mg-doped CeCo3 alloys have attracted wide attention due to their lots of advantages such as strong ferromagnetism, large magnetocrystalline anisotropy, low cost, and good hydrogenation property. However, the potential of coercivity in the Ce1−x
Mg
x
Co3 magnet has not been fully excavated, which restricts the practical application to a certain extent. In this work, the effects of grain size and anisotropy variation on coercivity have been investigated systematically by using micromagnetic simulation. It has been shown that the coercivity exhibits nonlinear size-dependence and can reach ∼1.45 T in the sample with a grain size around 320 nm. In addition, the random variation of magnetocrystalline anisotropy caused by the precipitated Co phase in the small grain would lead to the fluctuation of coercivity. Our work can provide guidelines for the design and implementation of permanent magnets.
Increasing the accuracy of processing thin-walled box-shaped parts
Authors: Danilenko E A , Yamnikov A S 
Published: May 2021

Abstract
The paper describes the development of a procedure for increasing the accuracy of processing thin-walled parts. The paper proposes a new method for fixing and processing thin-walled box-shaped parts, during which the coordinate of the workpiece base side position is measured using an RMP40 sensor before and after the application of clamping forces, followed by compensation for processing on a CNC milling machine. A special control program that takes into account elastic deformations has been developed. A comparative analysis of dimensions performance showed that the accuracy of coordinate dimensions performance taking into account the compensation of elastic deformations is higher than without compensation.
Automation of control the state of graphic collections and of content selection for design tasks in the printing
Authors: Proskuriakov N E , Yakovlev B S , Arkhangelskaia N N , Dementyeva K V 
Published: May 2021

Abstract
Results of pilot studies of use of average color for problems of support of graphic collections in current state and selection of graphics for the color parameters set by the user – search of duplicates of images, selection of graphics due to data entry of color in the RGB format and also search of illustrations in the set color range or the specific image are provided. Based on the conducted researches it was established that under certain conditions the indicator of average color of the image rather precisely finds duplicates of illustrations and can be applied to selection of the same images. The research showed that the JPG format, despite the low opportunities in transfer of color, can be considered the optimum format for search of duplicates of digital images. Also, it was defined that BMP, TIFF, PNG behave equally in tasks of finding of duplicates, optimum deviations from average color for the solution of this task were revealed.
Investigation of the rotational motion stability of the aist small spacecraft prototype according to the measurements of the earth’s magnetic field
Authors: Sedelnikov A V , Taneeva A S , Khnyryova E S , Kamaletdinova M V , Martynova E D 
Published: May 2021

Abstract
The paper deals with the rotational motion stabilization of the AIST small spacecraft prototype under the influence of a magnetic moment. According to the measurements of the Earth’s magnetic field by onboard measuring instruments, the angular velocity of small spacecraft rotation has significantly decreased over several years of active existence in a near-earth orbit. At the same time, attempts to actively control the angular velocity by magnetic executors were unsuccessful. In this investigation, approximate solution regions for the magnetic moment are obtained from the condition of the rotational motion stability around the center of mass of the AIST small spacecraft prototype. These regions can be further analyzed for compliance with the operation of the onboard equipment of a small spacecraft.
Combined Nonlinear Control of Non-Affine MIMO System with Input and State Delays
Authors: Eremin E L , Nikiforova L V , Shelenok E A 
Published: May 2021

Abstract
The article studies algorithms synthesis of a multiply connected system for controlling non-affine plants, the state variables of which are not available for direct measurement. It is shown that the decentralized control law constructed on the basis of the hyperstability criterion eliminates the influence of non-linearities and compensates external and parametric perturbations in the tracking multiply connected system with the required accuracy.
Numerical study of flow in a plane suddenly expanding channel based on Wilcox and two-fluid turbulence models
Authors: Malikov Z M , Nazarov F Kh , Omonov Z J , Abdukhamodov S K 
Published: May 2021

Abstract
The article presents the results of a numerical study of the flow structure in a flat channel in the zone of its sudden expansion. The calculations are based on the two-fluid turbulence model and the Wilcox turbulence model. The stationary solution of the problem was obtained by the establishment method, for which non-stationary equations of hydrodynamics were used. The paper investigates the velocity fields and turbulent stresses of the flow, as well as the drag coefficient in different sections of the channel. The main calculations were performed on a uniform grid with 300 × 90 nodes. For the difference approximation of the original equations, the control volume method of the second order in space is used. The correctness of the results was confirmed for Reynolds numbers Re = 36000 by comparison with experimental data found in the literature.
Impact assessment of the supply chain based on the theory of fuzzy sets
Authors: Mochalin S M , Radionova V A 
Published: May 2021

Abstract
The next questions were considered: creation of performance evaluation system as part of the automated software complex designed to improve the activities functioning of the business structures. These business structures are complex regarding their structure as well as liaison communications in a supply chain. Proposed model for the efficiency assessement was created while using the theory of fuzzy sets on the software basis in the MATLAB environment. Conducted investigations have shown that this developed model allows to create supply chains that are optimal in terms of its structure and efficiency; it equally formalizes the decision-making procedure and reduces the error probabilities when it comes to the supply chain management.
Simulation of purposeful movement in the transport network
Authors: Purtov A 
Published: May 2021

Abstract
A conceptual model of purposeful movement on the oriented graph of the route of the road network is presented. To determine the purpose of the movement and to stimulate the participants of the movement, two functions for calculating losses are proposed. For routing used the samples. The graph of one of the routes of Omsk was constructed using the technology of geoinformation systems. The simulation model has been developed on Java Script. A brief description of the simulation model and the experimenter’s window is given. The new results of experiments showing the influence of the target parameters, loss functions, the samples on the time and cost of moving along the route are presented. The complex relationships between the input and output data of the model are shown. The results obtained are considered from the point of view of the general problems of organizing a purposeful movement, such as goal selection, decision-making, coordination of the interests of the organizers and participants of the movement. The conclusion is made about the possibility of using the developed methods and tools for the analysis of purposeful movement in different spheres of activity.
On generic complexity of theories of finite algebraic structures
Authors: Rybalov Alexander 
Published: May 2021

Abstract
This article is devoted to investigation of generic complexity of universal and elementary theories of finite algebraic structures with universal set with more than one element of finite predicate signature with equality. We prove that there are no polynomial strongly generic algorithm, recognizing any such theory, provided P = BPP and P ≠ NP (P ≠ PSPACE). The author is supported by Russian Science Foundation, grant 19-11-00209.
Geometric model of the pursuit problem on a plane for the case of sets of targets and pursuers
Authors: Dubanov A A 
Published: May 2021

Abstract
This article examines a kinematic model of a group pursuing several targets by the method of parallel approach. The model is based on the fact that pursuers try to adhere to pre-designed trajectories. The pursuers’ trajectories have curvature constraints. The initial directions of the pursuers’ velocities are arbitrary, which changes the well-known method of parallel approach. In our model, targets are chased by the pursuers simultaneously. This is due to the change in the lengths of the predicted trajectories in such a way as to synchronize the time to reach the target. The change in the lengths of the predicted trajectories occurs due to an increase in the radius of curvature in the initial segment of the trajectory.
Model of the method of parallel approximation on the surface
Authors: Dubanov A A , Ausheev T V 
Published: May 2021

Abstract
The article considers the kinematic model of pursuit, transferred from plane to surface, by the method of parallel approach. Simulation of iterative pursuit processes is a topical continuation of autonomous unmanned vehicles. The aim of the article is to develop a model in which the trajectory of the pursuer is the result of following the predicted routes at each discrete moment in time. The research was carried out in the computer mathematics system Math CAD on a surface defined by a point basis. Situations with different initial states were simulated. Detailed results in the form of animated images based on materials, program codes can be found on the authors’ website and channel.
A Sierpiński triangle geometric algorithm for generating stronger structures
Authors: Zhikharev L A 
Published: May 2021

Abstract
In the twenty-first century, in the era of 3D printers and advanced technologies for the production of complex parts, it becomes possible to create objects that have a fractal structure. This gives relevance to the attempts of applying the knowledge of fractal geometry. This paper presents effectiveness confirmation and feasibility studies of using a fractal algorithm for making stronger structures. The algorithm is based on the Sierpiński fractal. The essence of the algorithm is to increase the buckling strength of the rods by fixing their midpoints. This principle makes it possible to create complex flat and three-dimensional structures, as well as to solve some engineering problems. Analytical strength calculations were run in Wolfram Mathematica, whilst Solid Works, a CAD and CAE program, were used to compute the strength.
Methodology formation of the training sample short-term forecasting electricity load for an energy supply company using data mining technologies
Authors: Khomutov S O , Khamitov R N , Gritsay A S , Serebryakov N A 
Published: May 2021

Abstract
For effective management of the power system operation mode the predictive information about hourly electrical load of all consumers is required. Forecasting errors, as a rule, lead to a decline of the technological and economic indicators of the power system operation, due to unreasonable changes of the generating equipment operating mode, as well as the selection of a non-optimal scheme of electrical networks. This article is devoted to improving the accuracy of short-term load forecasting of delivery points cluster of energy sales company with the use artificial neural networks. One of the most important conditions for achieving high prediction accuracy is the quality of the data sample required for training and testing neural network algorithms for short-term loading forecast. The proposed methodology is based on the authors’ analysis uses the factors influencing the hourly power loading. The proposed methodology is based on the authors’ analysis uses the factors influencing the hourly power loading as well as methods for improving the convergence of learning algorithms for artificial neural networks.
Load Model Identification using Steady-state Measurements for Power System Control
Authors: Pankratov A V , Zhuykov A K , Polishchuk V I , Postoyankova K Yu , Shuvalova A A 
Published: May 2021

Abstract
Power system control requires verified models of all its elements: generators, transformers, transmission lines, and power system loads. To identify load model parameters, the measurement data are used. The paper discusses the possibility of using steady-state measurements instead staged field test data. This requires taking into account an unobvious effect-the network response. The network response is due to the probabilistic nature of the power and voltage changes and the correlation between them. The network response effect is demonstrated using a probabilistic load model and a simple power supply scheme.