bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical model of 9-phase rectifying system
Authors: Panteleev V I , Sizganova E Yu , Petukhov R A , Brazhnikov A V , Saravanan V 
Published: November 2020

Abstract
A mathematical description of the output voltage of a 9-phase rectifying system that consists of three separate 3-phase rectifiers made according to the Larionov scheme, at sinusoidal phase voltages of a 9-phase EMF source (for example, a 9-phase alternating voltage generator) was obtained. This work represents the first stage of the development of the generic mathematical model of the steady state operation of a polyphase rectifying system that covers all possible forms of phase voltages of a polyphase EMF source (sinusoidal and non-sinusoidal), as well as all possible values of the number of phases of this source.
Management model of sustainable development of petrochemical industry enterprises
Authors: Ponikarova A S , Zotov M A , Salin A A 
Published: November 2020

Abstract
The article discusses the issues of sustainable development management in the context of innovation implementation. Formation of a new management model serves, according to the authors, to improve efficiency of innovation processes in organizations. In this regard, the article examines the complex of management measures in the general management system in the process of introducing innovations in conditions of uncertainty and risks. At the same time, the state of the level of sustainable innovative development of the petrochemical complex is studied. To achieve these goals, the study of the relationship between components of the company’s sustainable development is carried out; the role of the internal state of the economic system in this process is determined and the constraints that restrain transition to a new innovative quality are estimated. Based on the results of the study, a model for assessing the management of sustainable development of a company is proposed, taking into account innovative nature of the development. Thanks to this technique, it is possible not only to determine the quality of the management system for sustainable innovative development of the economic system, but also to identify directions for its improvement and development.
Research of distribution of oil flow in the pipeline with looping
Authors: Shestakov R A 
Published: November 2020

Abstract
The article studies the distribution of liquid flows when it is pumped through a section of a pipeline with a looping. The factors affecting the distribution of volume flow in the looping and passage were identified, on the basis of which a refined mathematical model of fluid flow in the pipeline section with looping and an algorithm for calculating the distribution of volume flow were developed. A refined calculation of the section with looping was carried out with minimal influence of previously unrecorded factors.
Study of the degree of atmospheric air pollution on a segment of the city highway
Authors: Parsaev E V , Teterina I A 
Published: November 2020

Abstract
The article presents the results of experimental and theoretical studies, as a result of which the impact of traffic organization on the level of air pollution from traffic flows was assessed. The studies were carried out on several sections of one segment of the city highway. The assessment of the state of atmospheric air pollution on a highway with heavy traffic (Mira Avenue, Omsk) was carried out on the basis of determining the content of carbon monoxide (CO) in the air, as one of the main components of the exhaust gases of the traffic flow. Calculations are graphically presented that confirm the unevenness of the amount of pollutant emissions by one passenger car that moves along a segment of a city highway, taking into account several options for traffic regime. Modes of movement are due to the organization of road traffic.
Database management systems application for the organization’s metrological support
Authors: Stepanov M S , Koshliakova I G , Sorochkina O Yu , Kirimova K V 
Published: November 2020

Abstract
For any product production, metrological support is of great importance, at the initial stage of which measuring instruments are selected taking into account their measurement range, error, design, and other parameters. Complete information about measuring instruments is contained in the Federal Information Fund for Ensuring the Measurements Uniformity, but it contains a very large data amount, which makes it difficult to select the necessary information for its application in a particular organization. To store and use information in the field of metrological support, it is proposed to use databases and access as a management system that is part of the Microsoft Office. The system elements are: tables for storing data; database queries; forms for easy data entry, viewing and editing; reports for processing data in the form of a ready-made document; pages for providing access to the database from a web page; modules for automating standard operations and creating new procedures using the Visual Basic programming language. Tables are made up of columns and rows. As a basis for the simplest measuring instruments database, two interrelated tables can be used: “Measuring instruments” and “Technical characteristics”. Further, such a database can be developed by adding other related tables.
Oil product fluorescence spectra analysed under excitation at a wavelength of 266 nm
Authors: Fedotov Yu V , Belov M L , Kravtsov D A , Gorodnichev V A 
Published: November 2020

Abstract
Experimental studies of the laser-induced fluorescence spectra of oil products for the fluorescence excitation wavelength of 266 nm were performed. A schematic diagram of the experimental setup and results of processing the laser-induced fluorescence spectra are presented. It is shown that the laser-induced fluorescence spectra of various oil products are in different spectral bands and have different spectral widths. The light-end oil products (gasoline, kerosene) have the narrowest spectra (a spectral width of ∼30 nm) with a spectrum maximum at the wavelength of ∼ 330 nm. Oil has the widest spectral width (∼ 200 nm and more) with a spectrum maximum at the wavelength of ∼ 440-450 nm. The heavy-oil products (diesel fuel, engine oil) and gas condensate fall in between. The heavy-oil products have a spectral width of ∼ 60-100 nm with a spectrum maximum at the wavelength of ∼ 360 nm. The gas condensate has a spectral width of ∼ 150 nm with a spectrum maximum at the wavelength of ∼ 430 nm.
Problems of metrology of macroeconomic indicators
Authors: Vasiliev N N 
Published: November 2020

Abstract
Humanity has been measuring distances, weights, time, etc. for a long time. Currently, the value of measurement results is constantly increasing due to the fast growth in the scale of industrial and information technologies. Producers and consumers every day have to make a huge number of decisions based on the measurement results with a direct impact on the functioning of business entities, level of well-being of the population and ability to evaluate the effectiveness of actions of state authorities in implementing national projects.
Mathematical modeling of the energy processes of the WSN node in the conditions of charge replenishment
Authors: Bashmakov R A , Oleynikov D N , Fedorenko V V 
Published: November 2020

Abstract
The article considers the problems that arise at the design stage of the wireless sensor networks (WSN) nodes, absorbing environmental energy in order to increase their autonomous operation, and associated with the accumulation, distribution and consumption of energy in electrical form directly inside the equipment. The authors propose a mathematical model based on an algorithm for calculating the accumulating charge process of the buffer capacity. This model helps to obtain the value of the required capacity for the accumulator and the corresponding input parameters of the primary energy converter. The mathematical model makes it possible to take into account the value of the energy consumption the self-discharge current, and the value of the current leakage. The article also presents an example of a computational experiment, analyzes its results, reveals the drawbacks of the developed algorithm, and provides possible solutions in the direction of increasing the accuracy and adequacy of the mathematical model.
Decommissioned oil production sites impact on the forest ecosystems soil cover state (on the example of the National Park “Buzuluk Bor”)
Authors: Zhichkina L , Zudilin S , Zhichkin K , Ariskina O 
Published: November 2020

Abstract
Oil and oil products are recognized as priority environmental pollutants, having a high degree of toxicity. They can pose a threat to the vital activity of various organisms populations. Operating and suspended production wells can directly contribute to soil pollution with oil products. Oil pollution affects the complex of the soil morphological, physical, physicochemical, biological properties, which determine its fertility and ecological functions. The article examines the hydrocarbon raw materials conserved deposits as pollution sources of the forest ecosystems soil cover. The article analyzes the results of experimental studies to determine the oil products content, heavy metals gross and mobile forms in soil samples around decommissioned deposits. The studies carried out confirm that the sites of the mothballed deposits contaminated with oil products and heavy metals need monitoring, conservation and recultivation. Due to prolonged downtime, destruction occurred in the wells. The tightness was broken. It leads to oil and gas leakage. As a result of research carried out in 2017-2018 the soil cover contamination with oil products of the suspended deposits was revealed. A dangerous category of soil pollution was noted in 2017. It was observed in the area of wells No. 6, 8, 229 on the Neklyudovsky field. In 2018 wells No. 6 and No. 229 of the Neklyudovsky field were characterized by a hazardous category of pollution. In the soil of the Neklyudovsky field of wells No. 6, 6 (gas), 8 there was a decrease in the petroleum products content in 2018 compared to 2017. In soil samples an excess of the heavy metals mobile forms MPC content was revealed in the Neklyudovsky field - well No. 6, 229, in the Mogutovsky field - well No. 103-K, in the Koltubanovsky field - well No. 6.
Can the ground enhance vertical force for inclined stroke plane flapping wing?
Authors: Deepthi S , Vengadesan S 
Published: November 2020

Abstract
The numerical investigation of 2D insect wing kinematics in an inclined stroke plane is carried out using an immersed boundary solver. The effect of vortex shedding and dipole jet on the vertical force generation by the flapping wing due to change in the stroke plane angle is investigated in the vicinity of the ground. The results of instantaneous force and vorticity contours reveal the underlying lift enhancement mechanisms for the inclined stroke plane flapping wing. Moreover, they aid in the understanding of the wake-ground interaction and the associated shear layers. The calculated average vertical force delineates different force trends for the inclined stroke plane flapping near the ground. Furthermore, the dipole jet patterns are analyzed for different heights. These patterns are found to be a better tool to assess the kinematics for the vertical force enhancement and reduction, especially at intermediate heights. Vertical force enhancement is the critical parameter in the design of the micro aerial vehicle (MAV). Through this study, it is certain that the dipole jet has the potential to be used as a lift modification mechanism in MAVs. In summary, the study gives a holistic view of the physics of the inclined plane kinematics near the ground and serves as the basis for the design of MAVs.
Movements shaping climate futures: A systematic mapping of protests against fossil fuel and low-carbon energy projects
Authors: Temper Leah , Avila Sofia , Bene Daniela Del , Gobby Jennifer , Kosoy Nicolas , Billon Philippe Le , Martinez-Alier Joan , Perkins Patricia , Roy Brototi , Scheidel Arnim , Walter Mariana 
Published: November 2020

Abstract
In this article we undertake a systematic mapping of 649 cases of resistance movements to both fossil fuel (FF) and low carbon energy (LCE) projects, providing the most comprehensive overview of such place-based energy-related mobilizations to date. We find that (1) Place-based resistance movements are succeeding in curbing both fossil-fuel and low-carbon energy projects. Over a quarter of projects encountering social resistance have been cancelled, suspended or delayed. (2) The evidence highlights that low carbon, renewable energy and mitigation projects are as conflictive as FF projects, and that both disproportionately impact vulnerable groups such as rural communities and Indigenous peoples. Amongst LCE projects, hydropower was found to have the highest number of conflicts with concerns over social and environmental damages. (3) Repression and violence against protesters and land defenders was rife in almost all activities, with 10% of all cases analysed involving assassination of activists. Violence was particularly common in relation to hydropower, biomass, pipelines and coal extraction. Wind, solar and other renewables were the least conflictive and entailed lower levels of repression than other projects. The results caution that decarbonization of the economy is by no means inherently environmentally innocuous or socially inclusive. We find that conflicts and collective action are driven by multiple concerns through which community mobilization seeks to reshape the energy regime and its impacts. These include claims for localization, democratic participation, shorter energy chains, anti-racism, climate-justice-focused governance, and Indigenous leadership. Climate and energy policymakers need to pay closer attention to the demands and preferences of these collective movements pointing to transformative pathways to decarbonization.
Geometrical optical diode for natural (ambient) light
Authors: Moagăr-Poladian Gabriel , Tibeică Cătălin , Ursu Dănuţ-Vasile 
Published: November 2020

Abstract
We present a device that acts as a diode for natural light. It has different transmission values when light travels in one direction and, respectively, in the opposite one. It relies on the geometric left-right asymmetry of scattering and absorption and uses diffuse light of whichever polarization and with a large spectral range.
1862
Authors: Masur Louis P. 
Published: November 2020

Abstract
“1862” covers the conscription of Confederate soldiers and the emergence of Robert E. Lee, who assumed command of the Army of Northern Virginia. Lee won many significant battles against larger Union armies. Both sides experienced heavy losses, in part due to new, deadlier weapons. Soldiers fought for a variety of reasons, and photographs of the battlefield destroyed the public’s romantic notions about the war. While the war was not going well for the Union, a Republican Congress passed legislation that would have been impossible previously. Lincoln announced the Emancipation Proclamation after the battle of Antietam and, by the end of the year, was poised to deliver it.
Assessing the Psychosocial Work Environment in Relation to Mental Health: A Comprehensive Approach
Authors: Shahidi Faraz V , Gignac Monique A M , Oudyk John , Smith Peter M 
Published: November 2020

Abstract

Objectives
Prevailing job stress models encourage a multidimensional view of the psychosocial work environment and highlight the role that multiple co-occurring stressors play in the aetiology of mental health problems. In this study, we develop a latent typology of psychosocial work environment profiles to describe how a comprehensive array of job stressors are clustered in the Canadian labour market. We also examine the association between these latent psychosocial work environment profiles and several indicators of mental health.

Methods
Data were collected from 6408 workers who completed the Canadian National Psychosocial Work Environment Survey. Psychosocial work exposures were measured using standard items from the Copenhagen Psychosocial Questionnaire. We employed latent profile analyses to identify groups of individuals with similar psychosocial work environment profiles. We used log-linear regression models to examine the association between latent psychosocial work environment profiles and burnout, stress, and cognitive strain.

Results
Four distinct groups with highly divergent psychosocial work environment profiles were identified. Adjusting for a range of demographic and socioeconomic factors, latent psychosocial work environment profiles were strongly related to mental health. Individuals who reported exposure to a comprehensive array of psychosocial job stressors (11% prevalence) reported the highest probability of burnout (PR: 7.51, 95% confidence interval [CI]: 5.56–10.15), stress (PR: 8.98, 95% CI: 6.20–13.0), and cognitive strain (PR: 7.29, 95% CI: 5.02–10.60).

Conclusions
Findings suggest that psychosocial work stressors are tightly clustered in the Canadian labour market, and that the clustering of work stressors is strongly associated with adverse mental health outcomes. Future scholarship may benefit from adopting a more comprehensive approach to the assessment of psychosocial job quality as a determinant of health and well-being.
Don’t Turn a Deaf Ear: A Case for Assessing Interactive Listening
Authors: Lam Daniel M K 
Published: November 2020

Abstract
The reciprocal nature of spoken interaction means that participants constantly alternate between speaker and listener roles. However, listener or recipient actions—also known as interactive listening (IL)—are somewhat underrepresented in language tests. In conventional listening tests, they are not directly assessed. In speaking tests, they have often been overshadowed by an emphasis on production features or subsumed under broader constructs such as interactional competence. This article is an effort to represent the rich IL phenomena that can be found in peer interactive speaking assessments, where the candidate–candidate format and discussion task offer opportunities to elicit and assess IL. Taking a close look at candidate discourse and nonverbal actions through a conversation analytic approach, the analysis focuses on three IL features (i) listenership displays, (ii) contingent responses, and (iii) collaborative completions, and unpacks their relative strength in evidencing listener understanding. This article concludes by making a case for revisiting the role of IL, calling for more explicit inclusion of IL in L2 assessment as well as pedagogy.
Morphological evolution in relationship to sidewinding, arboreality and precipitation in snakes of the family Viperidae
Authors: Tingle Jessica L , Garland Theodore 
Published: November 2020

AbstractCompared with other squamates, snakes have received relatively little ecomorphological investigation. We examined morphometric and meristic characters of vipers, in which both sidewinding locomotion and arboreality have evolved multiple times. We used phylogenetic comparative methods that account for intraspecific variation (measurement error models) to determine how morphology varied in relationship to body size, sidewinding, arboreality and mean annual precipitation (which we chose over other climate variables through model comparison). Some traits scaled isometrically; however, head dimensions were negatively allometric. Although we expected sidewinding specialists to have different body proportions and more vertebrae than non-sidewinding species, they did not differ significantly for any trait after correction for multiple comparisons. This result suggests that the mechanisms enabling sidewinding involve musculoskeletal morphology and/or motor control, that viper morphology is inherently conducive to sidewinding (‘pre-adapted’) or that behaviour has evolved faster than morphology. With body size as a covariate, arboreal vipers had long tails, narrow bodies and lateral compression, consistent with previous findings for other arboreal snakes, plus reduced posterior body tapering. Species from wetter environments tended to have longer tails, wider heads and reduced anterior tapering. This study adds to the growing evidence that, despite superficial simplicity, snakes have evolved various morphological specializations in relationship to behaviour and ecology.
Relaxed predation selection on rare morphs ofEnsatinasalamanders (Caudata: Plethodontidae) promotes a polymorphic population in a novel dune sand habitat
Authors: Rich Caitlyn , Reilly Sean B , Sinervo Barry 
Published: November 2020

AbstractThe ring species Ensatina represents a classic example of locally adapted lineages. The Monterey ensatina (Ensatina eschscholtzii eschscholtzii) is a cryptic subspecies with brown coloration, although a recently discovered polymorphic population within a wind-blown sand region also contains leucistic (pink) and xanthistic (orange) morphs. In the present study, the frequency of leucism/xanthism was mapped across the subspecies’ range, revealing that these morphs are generally rare or absent except within regions containing light-coloured substrate. Attack rates were estimated using clay models of the three morphs, deployed only at the crepuscular period and during the night, on both light and dark substrates at a site within the dune sand region. Model selection found that the interaction between morph and substrate colour best predicted attack rates. Typical morphs had equal attack rates on both substrates while xanthistic and leucistic morphs incurred significantly fewer attacks on light vs. dark substrate, and there was no significant difference in attack rates among morphs on light substrates. These results support the idea that xanthistic and leucistic morphs are poorly adapted for dark substrates compared to typical morphs, but they are more or less equally adapted for light substrates. We suggest that this microgeographic island of relaxed selection on light-coloured morphs helps to explain the existence of this polymorphic population.
A Divide & Conquer Approach to Leads-to Model Checking
Authors: Phyo Yati , Minh Do Canh , Ogata Kazuhiro 
Published: November 2020

Abstract
The paper proposes a new technique to mitigate the state explosion in model checking. The technique is called a divide & conquer approach to leads-to model checking. As indicated by the name, the technique is dedicated to leads-to properties. It is known that many important systems requirements can be expressed as leads-to properties, thus it is worth focusing on leads-to properties. The technique divides an original leads-to model checking problem into multiple smaller model checking problems and tackles each smaller one. We prove a theorem that the multiple smaller model checking problems are equivalent to the original leads-to model checking problem. We conduct two case studies demonstrating the power of the proposed technique.