bluuebunny/crossref_metadata_2025 huggingface dataset:
Chronic flavanol-rich cocoa powder supplementation reduces body fat mass in endurance athletes by modifying the follistatin/myostatin ratio and leptin levels
Authors: Ángel García-Merino Jose , Moreno-Pérez Diego , de Lucas Beatriz , Montalvo-Lominchar Maria Gregoria , Muñoz Elsa , Sánchez Lara , Naclerio Fernando , Herrera-Rocha Karen Marlene , Moreno-Jiménez Martha Rocío , Rocha-Guzmán Nuria Elisabeth , Larrosa Mar
Published: March 2020

Flavanols-rich cocoa reduced body fat composition in athletes through modulation of follistatin and leptin levels.
An implantable multifunctional neural microprobe for simultaneous multi-analyte sensing and chemical delivery
Authors: Wang Bo , Wen Ximiao , Cao Yan , Huang Shan , Lam Hoa A. , Liu Tingyi “Leo” , Chung Pei-Shan , Monbouquette Harold G. , Chiou Pei-Yu , Maidment Nigel T.
Published: March 2020

PDMS thin-film transfer and enzyme microstamping enabled 3-in-1 Si/PDMS hybrid chemtrode for multi-analyte sensing and chemical delivery in vivo.
Sandwich structured dielectrics for air-stable and flexible low-voltage organic transistors in ultrasensitive pressure sensing
Authors: Jiang Yue , Liu Ziyang , Yin Zhigang , Zheng Qingdong
Published: March 2020

A novel type of polymer sandwich dielectric is developed for air-stable, hysteresis-free and flexible OTFTs which can be used for low-power pressure sensors with ultrahigh sensitivity, wide detection range and fast response.
Shape engineering of polystyrene particles from spherical to raspberry-like to hollow flower-like via one-step non-surfactant self-templating polymerization of styrene in ethanol–water mixtures
Authors: Xiang Xuechen , Chen Zhe , Ren Dongfang , Xu Jiaqiong , Li Xiaofeng , Ye Zixin , Chen Ning , Chen Qiming , Ma Shiyu
Published: March 2020

We report a facile method for preparation of polystyrene (PS) particles with spherical, raspberry-like, and hollow flower-like structures by single-step non-surfactant self-templating polymerization of styrene in ethanol–water mixtures.
Correction: A p-type multi-wall carbon nanotube/Te nanorod composite with enhanced thermoelectric performance
Authors: Park Dabin , Ju Hyun , Oh Taeseob , Kim Jooheon
Published: March 2020

Correction for ‘A p-type multi-wall carbon nanotube/Te nanorod composite with enhanced thermoelectric performance’ by Dabin Park et al., RSC Adv., 2018, 8, 8739–8746.
Enhanced efficiency and stability of nonfullerene ternary polymer solar cells based on a spontaneously assembled active layer: the role of a high mobility small molecular electron acceptor
Authors: Luo Dou , Zhang Ming , Li Jian-Bin , Xiao Zuo , Liu Feng , Ding Liming , Zhu Xu-Hui
Published: March 2020

Introducing a medium bandgap electron acceptor into the PTB7-Th:COi8DFIC solar cell increases both thermal stability and PCE without external treatments.
Intersecting nodal rings in orthorhombic-type BaLi2Sn compound
Authors: Wang Xiaotian , Ding Gaungqian , Cheng Zhenxiang , Wang Xiao-Lin , Zhang Gang , Yang Tie
Published: March 2020

In this study, via first-principles, we predict that a recently synthesized BaLi2Sn material with Pmmn structure is a TNLS with perfect intersecting nodal rings in the kx = 0 and ky = 0 planes when the spin–orbit coupling (SOC) effect is ignored.
Blue-emitting thermoreversible oligourethane gelators with aggregation-induced emission properties
Authors: Jiang Nan , Zhu Dongxia , Su Zhongmin , Bryce Martin R.
Published: March 2020

Blue-emitting gels are scarce, especially oligomeric/polymeric systems. New oligourethanes display aggregation-induced emission and form blue fluorescent gels with extensive hydrogen bonding and oxygen cluster interactions between chains.
Bacterial phenotypic heterogeneity in DNA repair and mutagenesis
Authors: Vincent Maxence S. , Uphoff Stephan
Published: March 2020

Genetically identical cells frequently exhibit striking heterogeneity in various phenotypic traits such as their morphology, growth rate, or gene expression. Such non-genetic diversity can help clonal bacterial populations overcome transient environmental challenges without compromising genome stability, while genetic change is required for long-term heritable adaptation. At the heart of the balance between genome stability and plasticity are the DNA repair pathways that shield DNA from lesions and reverse errors arising from the imperfect DNA replication machinery. In principle, phenotypic heterogeneity in the expression and activity of DNA repair pathways can modulate mutation rates in single cells and thus be a source of heritable genetic diversity, effectively reversing the genotype-to-phenotype dogma. Long-standing evidence for mutation rate heterogeneity comes from genetics experiments on cell populations, which are now complemented by direct measurements on individual living cells. These measurements are increasingly performed using fluorescence microscopy with a temporal and spatial resolution that enables localising, tracking, and counting proteins with single-molecule sensitivity. In this review, we discuss which molecular processes lead to phenotypic heterogeneity in DNA repair and consider the potential consequences on genome stability and dynamics in bacteria. We further inspect these concepts in the context of DNA damage and mutation induced by antibiotics.
Integrated tracking and route classification for travel time estimation based on cellular network signalling data
Authors: Gundlegård David , Karlsson Johan M.
Published: March 2020

This study evaluates the effectiveness of using detailed cellular network signalling data for travel time estimation and route classification. Here, the authors propose a processing pipeline for estimating travel times and route classification based on Cell ID and received signal strength (RSS) measurements from a cellular network. The pipeline combines cellular fingerprinting, particle filtering, integrity monitoring, and map matching based on a hidden Markov model (HMM). The method is evaluated using a dataset of 11,000 cellular RSS measurements with corresponding GPS locations for the city of Norrköping, Sweden. The basic fingerprinting method has a CEP‐67 location accuracy of 111 m and both particle filtering and integrity monitoring improved the results: 79 and 38 m for particle filtering and particle filtering with integrity monitoring, respectively. The route classification method resulted in a precision of 0.83 and a recall of 0.92, which are clear improvements compared to basic map matching of fingerprinting estimates. This new type of noise‐adaptive travel time sampling in combination with an HMM‐based route classification shows promising results and can potentially support large‐scale estimates of both route choice and travel times using detailed cellular network signalling data in urban areas.
Integration of periodic, sub‐wavelength structures in silicon‐on‐insulator photonic device design
Authors: D'Mello Yannick , Reshef Orad , Bernal Santiago , El‐fiky Eslam , Wang Yun , Jacques Maxime , Plant David V.
Published: March 2020

Rapid advances in high‐resolution chip lithography have accelerated nanophotonic device development on the silicon‐on‐insulator (SOI) platform. The ability to create sub‐wavelength features in silicon has attracted research in photonic band and dispersion engineering and consequently made available a wide array of device functionalities. By drawing on recent demonstrations, the authors review how periodic, sub‐wavelength structures are used for passive wave manipulation in SOI device design. The optical response is evaluated for both orthogonal polarisations at the telecom wavelengths of 1310 and 1550 nm. The results offer a versatile toolkit for the integration of these features in conventional nanophotonic device geometries. Notable benefits include a fine control of dispersion, wavelength and polarisation selectivity, and broadband performance.
A new signal injection‐based method for estimation of position in interior permanent magnet synchronous motors
Authors: Yi Bowen , Vukosavić Slobodan N. , Ortega Romeo , Stanković Aleksandar M. , Zhang Weidong
Published: March 2020

Several heuristic procedures to estimate the rotor position of interior permanent magnet synchronous motors (IPMSM) via signal injection have been reported in the application literature, and are widely used in practice. These methods, based on the use of linear time‐invariant (LTI) high‐pass/low‐pass filtering, are instrumental for the development of sensorless controllers. To the best of authors’ knowledge, no theoretical analysis of these methods has been carried out. The objectives of this note are (i) to invoke some recent work on the application of averaging techniques for injection‐based observer design to develop a theoretical framework to analyse the LTI filtering used in sensorless methods and (ii) to propose a new method that on the one hand ensures improved accuracy and on the other hand can be related to the current filtering technique. An additional advantage of the new method is that it relies on the use of linear operators, implementable with simple computations. The effectiveness of the proposed scheme is assessed by experiments on an IPMSM platform driven by a 521 V DC bus with a 5‐kHz pulse‐width modulation.
Thésaurus d’agroécologie : une approche par les usages et avis d’experts
Authors: Batifol Véronique , Aubin Sophie , Hazard Laurent , Theau Jean-Pierre , Bouffartigue Cathy , Magrini Marie-Benoit
Published: March 2020

En l’absence de thésaurus spécialisé dans le domaine de l’agroécologie, un groupe métier aux compétences complémentaires (experts scientifiques et spécialistes de l’information scientifique et technique) a construit un « thésaurus d’agroécologie ». Ce thésaurus est issu de la valorisation de l’ensemble des termes capitalisés par le dispositif de veille territoriale Agroécologie conduit à l’échelle de la région Midi-Pyrénées sur la période 2013–2017. L’ensemble des données constitutives de ce thésaurus est accessible sous Licence Ouverte et dans un format standard. Exposé sur différents portails de vocabulaires généralistes ou thématiques, ce thésaurus pourra être réutilisé à d’autres fins. Cet article décrit la méthodologie de constitution, le contenu et la structuration de ce thésaurus ainsi que son potentiel de réutilisation. L’originalité de ce travail est de reposer sur une expertise scientifique conduite à partir des termes d’usage des opérateurs du monde agricole et agro-alimentaire. La méthode proposée peut être réemployée pour construire des thésaurus sur d’autres domaines émergents.
Improvement recommendations for railway infrastructure maintenance
Authors: Popović Zdenka , Lazarević Luka , Brajović Ljiljana , Mićić Milica , Mirković Nikola
Published: March 2020

Based on the railway network performance, Infrastructure Manager is obligated to define the Maintenance plan for railway infrastructure, which contains corresponding values for intervention limits and alert limits. This paper considers vehicle response to track excitation due to the rail defect (code 2202 according to defect classification). It is indicated that theoretical models and acceleration measurements could be used to assess the quality of track geometry and ride comfort. The importance of early detection of irregularities of superstructure and substructure was emphasized. Moreover, the importance of inspection and preventive maintenance on the modern railway infrastructure was considered. According to the previous, the authors recommend non-destructive methods for inspection and early detection of irregularities of railway infrastructure.
Instrument implementation of an automated complex for recording physiological parameters of drivers
Authors: Khizbullin Robert , Khizbullin Radik , Galiakhmetov Valerii
Published: March 2020

Goal of research: creation of an automated complex for quick and effective identification of an unacceptable condition of drivers before going to run and predicting their physiological state during a work shift. To achieve this goal in the creation of devices for the automated complex the following methods were used: photoplethysmographic method, pulse oximetric method, thermometric method. In the course of the research, results were achieved that make it possible to record physiological parameters of drivers with high reliability. This is achieved thanks to the use of the “isobestic point” photoplethysmogram in the registration at a length of 805 nm, the use of a two-channel pulse oximeter at wavelengths of 660 nm and 910 nm.
Plugging slurry (backfill) and surface cavity closure technology
Authors: Prokopov Al’bert , Prokopova Marina , Stel’makh Sergei , Chernil’nik Andrei
Published: March 2020

The purpose of the study is to study mining and environmental emergencies associated with the formation of sinkholes of the earth’s surface over mining workings after the mass closure of coal mines and to develop a new method for eliminating the sinkhole. The study used a method of physical modeling, which investigated the influence of humidity on the deformation properties of burnt rocks used as a filler in the manufacture of plugging and filling suspensions, while establishing the dependence of the relative deformation of dump rocks on the load at their natural humidity and water saturation. The main results of the research are: a new method for eliminating dips in the earth’s surface over the inclined opening workings of the liquidated coal mines of the Eastern Donbass; formulations of plugging and filling suspensions used for layer-by-layer filling of sinkholes and providing non-shrink laying.
Calculation of solid-state cargo fastener under the influence of longitudinal forces
Authors: Ruzmetov Yadgor , Molchanova Oksana , Shihnazarov Jamol
Published: March 2020

Cargo securing on a railway platform, elastic and retention fasteners, longitudinal transport force of inertia, forces in elastic fastenings. Purpose: The paper presents the calculation of the longitudinal transport force of inertia; determines the longitudinal force perceived by the elastic elements of the cargo securing; determines the reactions of retention bars depending on the number of bars and fasteners (nail); calculates the sum of all holding forces; calculates the forces in the elastic fasteners when exposed to longitudinal forces. Research methods: To determine the forces in the cargo securing devices, existing calculation methods are used. Moreover, the formulas of these techniques are presented in a form convenient for calculation. Main results: The paper proves that according to the existing method, the force in all elastic cargo fasteners under the influence of longitudinal forces has the same value, regardless of the different arrangement of the geometric parameters of the fasteners in space. The forces in them are more than 1.6 times higher than the permissible values. The calculations of forces in the elastic fasteners, which are performed by the specified method, are given. The results of the comparative analysis showed that the forces in all wire fasteners, in contrast to the existing calculation method, have different values. However, the strength of the second pair of wire fasteners of both one and the other direction is not ensured - the force in them more than two times exceeds the permissible value (61/24.8≈2.5), which will result in their destruction during the cargo transportation. Conclusions and their significance for the industry: Existing calculation methods do not provide guarantee strength of cargo fasteners. In the future, to calculate the fastening of cargo by shippers in the railway industry, a new calculation procedure should be applied for the allocation and fastening of cargo on the car.
Modeling of a Mill for Processing a Turbine Blade
Authors: Malneva Julia , Kuts Vadim , Altukhov Aleksandr , Kuznetsova Luibov , Kuznetsov Konstantin , Vorobiev Evgenii
Published: March 2020

The aim of the study is to model the cutting edges, front and rear surfaces of the cutter with a constructive feed for machining a turbine blade. In the modeling process, we used the method of compiling mathematical models of technological processes for obtaining surfaces of parts using cutting. As a result, equations of the cutting edge of the mill, equations of the producing surface were obtained, parametric equations of the rear and front surfaces of the cutting teeth were constructed, and it was also proposed to introduce corrections to reduce the profile distortion after regrinding into the insertion motion parameter.
Modeling the mechanical wear of the contact elements of pantograph during high-speed movement
Authors: Philippov Victor , Smerdin Alexandr
Published: March 2020

The use of contact elements with an extended service life is one of the most economical and least costly ways to ensure reliable, economical and environmentally friendly transmission of electricity to rolling stock. To evaluate the service life in OSTU, a methodology for conducting experimental studies of contact pairs of pantograph has been developed and successfully tested, involving bench tests for each pair of contact materials “contact insert - contact wire” in order to determine their optimal combination to reduce wear and increase service life. Assessment of the amount of wear and prediction of the life of the contact elements are made, including using mathematical modeling. The purpose of this article is to improve the mechanical component of the wear model of the contact elements of pantograph in high-speed conditions. The results of experimental studies and theoretical calculations of the mechanical wear of contact elements are presented. The analysis of the graphs allows us to conclude that it is possible to use an improved mathematical model for modeling the mechanical component of the wear process of the elements of contact pairs with a maximum error value of not more than 5%.
An assessment of the sewer tunnel stress-strain behavior during the reconstruction of an object of cultural heritage
Authors: Ledyaev Alexander , Kavkazskiy Vladimir , Grafov Dmitry , Soloviev Dmitry , Benin Andrey
Published: March 2020

The article offers an information about the work carried out on technical monitoring of the city sewerage system tunnel in the framework of the actual problem of recreating the objects of cultural heritage of St. Petersburg, which fall into the protected zone of underground engineering networks. The purpose of the study is to identify values of the stress-strain state of the tunnel lining at various stages of construction of a cultural heritage object located on the earth’s surface in the immediate nearness. For formation of a base of the analyzed values was undertaken geolocation of ground massive, conducted geodetic measurements, defined the deformation of the soil by inclinometer boreholes, was obtained graphs of precipitation the soil massive, developed by setup technology for strain gauge sensors linear displacement inside the tunnel, worked out the mathematical model in the specialized software. Analysis of the obtained results allowed us to associate values of the stress-strain state of the collector tunnel effect from the buildings under construction and structures, as well as to identify the actual task for further research to develop methods of rapid diagnosis of the stress-strain state of tunnel lining structures in terms of their special mode of operation.
Investment activity at the objects of specially protected natural territories of the Tyumen region
Authors: Bogdanova Olga
Published: March 2020

This article discusses the possibilities of investment activities on the territories of objects of specially protected natural territories. The analysis of existing objects with identification of possible types of business activity within the current legislation is carried out. The purpose of this study was to determine the main directions of development of investment activity in territories of especially protected natural objects, and to offer basic stages of the evaluation presents the calculation of key performance criteria as a result of implementation of investment projects of ecological tourism. Criteria for ecological tourism are considered and an algorithm for implementing an investment project on the territory of an object, a specially protected natural area, is developed on the example of the Tyumen region. When writing the article, we used the General scientific method (analysis, synthesis, logical method), statistical method, sample observation method, and system analysis. The main results of this study can be considered the development of an algorithm for evaluating investment projects in specially protected natural areas, as well as methods for their evaluation.
Problems of using specially protected natural territories in cities
Authors: Kustysheva Irina
Published: March 2020

This study addresses the issue of using the city’s green zone as a specially protected area. The purpose of the study is to study the problems of using the green zone of the city to determine ways to optimize the management of these components of natural complexes as an environment-forming factor in the population. The ways of optimizing the management of these components of natural complexes as an environmentforming factor of the population are determined. It was revealed that the architectural and artistic appearance of the city largely depends on the number and condition of green areas, providing comfortable conditions that will satisfy the needs of citizens in leisure, social relations, economic activity and in general, ensure a high level of quality of life.
Sustainability and economic security of territorial development in St. Petersburg
Authors: Orlovskaya Tamara
Published: March 2020

The research is devoted to improvement of the methodological tool for assessing the sustainability of the socio-economic territorial development in megalopolis based on the analysis of local budget expenditures for the development of social infrastructure and security. The purpose of the research is to determine the compliance of financial capabilities of the territory and the needs of the residents to for comfortable and safe urban environment. The paper uses methods for normalizing indicators by reducing the size scale to the dimensionless scale, comparative studies, and the results of sociological surveys. The author has calculated the coefficients of budget stability and security index for the St. Petersburg’ districts, and established the nature of the relationship between the factorial indicator of tax revenues and local budget expenditures to ensure the quality of life for residents. The proposed approach allows us to assess the efficiency of budget expenditures and compare the results of statistical data and sociological surveys on the level of development of social infrastructure and security in the metropolis. The results can be used to assess the effectiveness of local budget expenditures and programs for the sustainable development of St. Petersburg.
Economic assessment of construction of the roadside service facilities
Authors: Makovetskaya-Abramova Olga , Ivanov Andrey , Lazarev Yuriy , Shakhova Mariya , Rozov Artem
Published: March 2020

There is a strategy of the E-95 road «Pskov» infrastructure improvement and some practical recommendations for implementation of the plan in this work. The main purpose of the article is infrastructure improvement of the section of the Federal highway, for example, some new workplaces can be created, moreover, comfort and safety increasing can improve people’s quality of life. Such objects as petrol-filling stations and service stations are essential elements for the modernization of the roadside infrastructure at this highway. It is offered to apply a typical business plan and calculate the cost of every type of such constructions taking into account the requirements of regulatory documents. There is a necessity for the construction of 2 new service stations and 9 new petrolfilling stations, in accordance with the analysis of the roadside infrastructure. Amount and nomenclature of technological equipment of stations are thoroughly worked out and calculated by the authors of the statement, moreover, writers calculate power and transportation and installation cost. The results of the survey have practical importance and they can be recommended for improving the roadside structure. The results of the survey are optimal service delivery project for the road users in case of the transport load on the section of the Federal highway.
Use of plasticizers in the production of PMB, as a tool for creating effective binders
Authors: Vysotskaya Marina , Litovchenko Dmitry , Shiryaev Artem , Lashin Maxim
Published: March 2020

Currently, the use of an appropriate type of binder suitable for specific climate conditions has become an important area for ensuring the operational reliability of asphalt concrete coatings. However, it is worth noting that the required set of PMB properties depends not only on the percentage of the polymer, but also on the type of plasticizer used. The results of comparative tests of polymer-bitumen binders prepared using 6 different plasticizing additives are presented. The dependence of changes in the parameters of modified binders, as well as their thermal stability, is studied. Based on the analysis of generalized efficiency criteria, a Comprehensive assessment of the effect of the plasticizer on the properties of the final product – PMB-was performed. The result demonstrates the need to use plasticizing components to achieve the required properties of the modified binder. Recommendations are given to maintain the required level of physical and mechanical parameters of PMB.
Methodological principles of forming multichannel digital communication in the supply chains
Authors: Naumov Vladimir , Naumova Elena , Shteyngart Evgeniy , Ostrovskaya Natalya
Published: March 2020

Logistics is undergoing a digital transformation to manage material and intangible flows using various digital communication channels. In this regard, it is extremely urgent to develop a backbone and local IT platforms that unite participants in the supply chain to collect and analyze information for making optimal management decisions. The purpose of this study is to substantiate the main methodological principles of the formation of digital communications between participants in the supply chain to create an inter-corporate information and communication system. In preparing the material, such scientific methods as analysis and synthesis, process modeling, process method, and system approach were used. A model for organizing digital communication in the supply chain using the backbone communication IT platform is proposed. The role of digital trust in the organization of inter-corporate digital communication is shown, and the entropy factor is also taken into account when assessing the throughput of communication channels. The result of the study is the formulation and justification of methodological principles for the introduction of multi-channel digital communication, providing not only electronic data exchange between logistics partners, but also reducing the logistic and transaction costs of supply chain participants.
Millimeter Wave Radar for Intelligent Transportation Systems: a Case Study of Multi-Target Problem Solution
Authors: Kutsov Vladimir , Badenko Vladimir , Ivanov Sergey , Fedotov Alexander
Published: March 2020

The influence of millimeter-wave radar receiver noise on the probability of unambiguous determination of unmanned vehicles speed and range in the intelligent transportation system of the «smart city» is investigated. For the proposed new multi-target detection method for FMCW radar, the effect of the technical parameters of the vehicle radars on the required signal-to-noise ratio (SNR) of the receiver is estimated to ensure the probability of true determination of target parameters at 98%.
Calculation of the transformation plasticity strain in the shape memory cylinder
Authors: Kukhareva Anna , Kozminskaia Olga , Volkov Alexander
Published: March 2020

A connected thermomechanical boundary problem for an infinite shape memory alloy cylinder loaded by an axial force and subjected to heating or cooling from the surface is solved. The evolution of stress-strain state is calculated for a process of the transformation plasticity. The mechanical properties of a material point are given by a micromechanical model accounting for the deformations due to elasticity, thermal expansion and phase transformation. The obtained problem was solved numerically using the iterative procedure with a variable iterative parameter. The influence of the surface temperature rate and radius of cylinder on the transformation plasticity is investigated. It is shown, that the elongation due to the transformation plasticity effect decreases with the increasing temperature rate. The elongation also decreases with the increasing cylinder diameter. This phenomenon can be explained by an inhomogeneity of the temperature and stress fields causing different conditions for the phase transformation in different points of the body. Stress in the local region can overtop more than twice the mean value.
Enlarged brick blocks as an alternative to masonry
Authors: Prusakova Maria , Mkrtchyan Armen , Pugach Evgeniy
Published: March 2020

Brick structures are one of the most common and useful construction materials. However, brick laying consists of the most labor-intensive processes with the largest part of manual works. The main purpose of the research is to find an alternative technology for the brick structures construction that have geometric and physical parameters of brickwork, the processes of which are less labor-intensive and more mechanized. Using factory-made enlarged brick blocks was suggested in the article as an alternative. A brick block is a factory - made element of a brick wall structure that is installed in the design position by crane equipment. By reducing the part of manual labor in installing the brick block, the total duration of construction is reduced while maintaining the final result – a brick wall. The research method was a comparative analysis of the resulting indicators of construction of structures made of individual bricks and installation of enlarged brick blocks. As a model for comparative analysis, a brick wall of specified parameters was proposed, on the basis of which calculations were made. The results show diagrams of labor and material resources spent on the construction of the wall for the two technologies under consideration. Based on the results obtained, we can conclude that it is possible to use enlarged brick blocks of high factory readiness as an alternative to masonry.
Assessing the application efficiency of organic fiber filler for foamed fiber concrete
Authors: Golova Tatiana , Magerramova Inna , Andreeva Natalia
Published: March 2020

The feasibility of using organic fiber filler as reinforcing fibers for non-autoclaved foamed concrete composites is discussed in the paper. The aim of the research is to analyze the factors affecting the strength and thermal insulation properties of foamed concrete and fiber concrete. Moreover, the study purpose is to obtain correlations for predicting the technological properties of thermal insulation foamed concrete and fiber concrete mixtures. The results of studying the indicators of compressive strength, bending, and thermal conductivity of a foamed fiber concrete composition with organic fiber filler are presented. The optimal sizes and amounts of organic filler made of straw are determined. The introduction of 15-30% of the total mixture mass is the most effective. In this case, the compressive strength increases by 28%, and the value of the thermal conductivity coefficient decreases by 8% compared with the control samples.
The organization of municipal solid waste collection, disposal and recycling in Kazakhstan
Authors: Serikova Aishabibi , Baidakov Assilbek , Syrlybayeva Nazgul
Published: March 2020

This article analyzes the organization of municipal solid waste collection, disposal and recycling in Kazakhstan based on the National Committee Statistics data - the annual statistical bulletin “On the collection, removal, processing (sorting) and burial (deposit) of municipal waste in the Republic of Kazakhstan” for 2015-2018 years. The article examined the municipal solid waste sources, the main indicators of the municipal solid waste collection, transporting, sorting, disposal and recycling. It is concluded that to solve the problems of municipal solid waste collection, disposal and recycling necessary to solve the following issues: 1) need control over the application of laws in the waste management field; 2) necessary to change people’s ecological behavior; 3) important is the availability of secondary resources market.
Methodology for managing financial risks of Kazakhstan enterprises
Authors: Alieva Baglan , Saparbayev Abdizhapar , Zhanibekova Gaukhar , Noiyanov Myras , Kim Valeriy
Published: March 2020

The article tells about the main types of financial risks on the example of Kazakhstan enterprises and JSC “KAZMUNAIGAS”RD. One of the main types of risks inherent in the Kazakh financial market at the present time was identified, the necessity of using coefficients for recognizing the degree of financial risks was proved on the example of a comparative study based on the VaR method, at the same time, the reasonableness of using futures and option contracts for insuring financial risks of organizations was proved.
Tramway as an indicator of the realisation of Smart City concept
Authors: Savchuk Ivan , Nahornyi Tymofii
Published: March 2020

Nowadays, the world’s leading cities are focused on the Smart City concept, due to the widespreading of innovations that enhance quality of life. The need for sustainable development for the harmonious prolongation of the humanity existence raises attention to attempts for improving the economic, social and environmental conditions. Among the modes of transport, the most harmonious in the modern city, which strives for sustainable development, is the tramway. The experience of the tramway renaissance during the last decades indicates that it is not only a mode of transport but also a positive impact on the urban space and community. In the context of Ukraine’s integration into the European Community, it is important to analyse the experience of cities that have been successful in implementing urban transport innovations. In the article, we compare the cities of Kyiv and Budapest to find spatial patterns that should be obeyed for the sustainable development of a post-socialist city based on smart solutions.
Assessment and Students Alignment: The Case of a Portuguese Business Simulation Course
Authors: Oliveira Helena Costa , Gomes Luís
Published: March 2020

In high education, assessment components are very important as condition the student’s success. Such components must involve several issues including soft and hard skills. The quality of education will depend on the alignment of such skill and their assimilation by students. We present a course taught in Portuguese, belonging to the graduation of Accounting and Administration, that covers several assessment tasks such as oral presentation, written exams, operationalization of tasks, assessment of physical dossiers, punctuality and attendance, ethical behaviour, and company management report. Data were collected in 2019 thought to triangulate methods, namely documental analyses, direct observation, and paper questionnaires. We aim to evaluate the degree of importance perceived by students for each evaluation component. We conclude that the students consider all of the components very important, attributing less importance to hard skills, namely the multidisciplinary contents evaluated thought written exams. This paper contributes to higher education studies by presenting the alignment of an assessment model and students.
The Role of Quality Education in the Mechanism of Transparency State Authorities
Authors: Suingariyev Zhaxybay , Kunanbayeva Duissekul , Kunanbayeva Aizat , Molchanov Mikhail
Published: March 2020

In modern society, the importance of quality education is steadily increasing, and the spiritual, cultural and moral potential of society is associated with its development. Based on a study of the civic education model, we will present elements related to the country’s commitment to open government at the international level and propose strategies for implementing specific policies that support these commitments regarding education and global citizenship. Therefore, our goal is to provide the scientific community with practical tools for quality education in the mechanism of openness of state bodies based on Al-Farabi’s research.

The need of society and the state for the innovative development of the economy in a rapidly developing world is continuously associated with the improvement of universities in the formation of vocational training for graduates - future specialists. The country needs such personnel who are ready to create and introduce innovations in the field of open government, with the possibility of control by society, as well as the dynamic cooperation in active way of participation of citizens themselves in management and to monitor government initiatives and their legitimacy. Continuous improvement of the quality of education should be the goal not only of the country’s leadership, but also of each citizen individually and of society as a whole.
Molecular characterization of a potential receptor of Eimeria acervulina microneme protein 3 from chicken duodenal epithelial cells
Authors: Zhang Zhenchao , Zhou Zhouyang , Huang Jianmei , Sun Xiaoting , Haseeb Muhammad , Ahmed Shakeel , Shah Muhammad Ali A. , Yan Ruofeng , Song Xiaokai , Xu Lixin , Li Xiangrui
Published: March 2020

Eimeria acervulina is one of seven Eimeria spp. that can infect chicken duodenal epithelial cells. Eimeria microneme protein 3 (MIC3) plays a vital role in the invasion of host epithelial tissue by the parasite. In this study, we found that chicken (Gallus gallus) ubiquitin conjugating enzyme E2F (UBE2F) could bind to the MIC3 protein of E. acervulina (EaMIC3), as screened using the yeast two-hybrid system, and that it might be the putative receptor protein of EaMIC3. The UBE2F gene was cloned from chicken duodenal epithelial cells. The recombinant protein of UBE2F (rUBE2F) was expressed in E. coli and the reactogenicity of rUBE2F was analyzed by Western blot. Gene sequencing revealed that the opening reading frame (ORF) of UBE2F was 558 base pairs and encoded a protein of 186 amino acids with a molecular weight of 20.46 kDa. The predicted UBE2F protein did not contain signal peptides or a transmembrane region, but had multiple O-glycosylation and phosphorylation sites. A phylogenetic analysis showed that the chicken UBE2F protein is closely related to those of quail and pigeon (Coturnix japonica and Columba livia). A sporozoite invasion-blocking assay showed that antisera against rUBE2F significantly inhibited the invasion of E. acervulina sporozoites in vitro. Animal experiments indicated that the antisera could significantly enhance average body weight gains and reduce mean lesion scores following a challenge with E. acervulina. These results therefore imply that the chicken UBE2F protein might be the target receptor molecule of EaMIC3 that is involved in E. acervulina invasion.
Design and practical evaluation of a shielded application system for intravenously administered radionuclide therapies
Authors: Kühnel Christian , Winkens Thomas , Niksch Tobias , Greiser Julia , Schrott Steffen , Drescher Robert , Freesmeyer Martin
Published: March 2020

Aim Intravenous radionuclide therapies are gaining importance. With the increased frequency of these therapies, safe application procedures in combination with effective radiation protection are needed. We present a shielded system which can be universally used for the application of liquid radiopharmaceuticals.

Materials and methods The application system consists of a cuboidal box made of lead with stainless steel coating, an inner layer of polymethyl methacrylate (PMMA), a disposable line/bottle system, and a medical infusion pump. No proprietary disposable parts are used. The system was tested and validated ex-vivo, and evaluated for Lu-177 peptide receptor radionuclide and for radioligand therapies (PRRT, RLT).

Results Construction of the application system was performed in accordance with the physical characteristics of the used isotopes. 10 validation procedures with 1 GBq Tc-99m-pertechnetate confirmed functionality. 38 PRRT and 13 RLT procedures were performed successfully and completely. At least 98 % of the prescribed activities were infused. No leakage of radioactivity occurred. Dose rate measurements showed that the radiation in the box is shielded completely, and that exposure arises only from the infusion line outside the box and from the patient.

Conclusion The presented application system for intravenous radionuclide therapies is feasible, safe, and cost-efficient. It has been shown that Lu-177-PRRT and -RLT can be performed without complications while ensuring nearly complete infusion of the prescribed radiopharmaceutical dose. Radiation exposure of the applying physician and other staff is low. The construction of the shielding box ensures complete shielding of all radionuclides currently used for radiomolecular therapies.
DFT and DFT+U investigation of the effect of spin–orbit interaction and exchange-correlation energy on electronic and magnetic structures of Ir-based double perovskites Ba2TIrO6 (T = Cr, Mn, and Fe)
Authors: Musa Saad H.-E. M. , Anwar K Abdelhalim Mohamed
Published: March 2020

This study utilizes the generalized gradient approximation (GGA) and GGA+U methods within the first-principles density functional theory to investigate the electronic and magnetic structures of Ir5+-based double perovskites Ba2TIrO6 (T = Cr, Mn, and Fe). Also, we include the spin–orbit (SO) interaction to incorporate the scalar relativistic effect in calculations. The structural optimizations and stability revealed that Ba2TIrO6 exhibits a cubic structure (space group Fm-3m). GGA+U and GGA+SO+U yield quite accurate results of the bandgaps and conduction states as compared to GGA and GGA+SO methods. The total and partial densities of states (DOSs) predict that Ba2TIrO6 shows two behaviors: half-metallic (T = Cr) and metallic (T = Mn and Fe), wholly transforming to the half-metallicity nature when SO and U are jointly turned on within the GGA+SO+U method. Moreover, the results of magnetic structures expose the existence of ferromagnetic (T = Cr and Fe) and antiferromagnetic (T = Mn) orderings in Ba2TIrO6 via 180°-superexchange T3+–O2−–Ir5+. Analysis of the DOSs and magnetic moments shows that the inclusion of the SO interaction has an insignificant effect on Ir-5d4 electrons in all compounds.
A note on exact solutions of the logistic map
Authors: Maritz Milton F.
Published: March 2020

The logistic map, whose iterations lead to period doubling and chaos as the control parameter, is increased and has three cases of the control parameter where exact solutions are known. In this paper, we show that general solutions also exist for other values of the control parameter. These solutions employ a special function, not expressible in terms of known analytical functions. A method of calculating this function numerically is proposed, and some graphs of this function are given, and its properties are discussed.
Multichannel fiber laser acoustic emission sensor system for crack detection and location in accelerated fatigue testing of aluminum panels
Authors: Williams Caitlin R. S. , Hutchinson Meredith N. , Hart Joseph D. , Merrill Marriner H. , Finkel Peter , Pogue William R. , Cranch Geoffrey A.
Published: March 2020

Detection and location of the source of acoustic emission in a thin aluminum panel is demonstrated using a multichannel fiber laser sensor system. Acoustic emission generated by a crack in an aluminum panel used as a test coupon in an accelerated fatigue experiment is detected and the location of the crack identified. Acoustic emission is detected over a bandwidth of around 0.5 MHz from a serially multiplexed array of four laser sensors and compared with measurements taken from four piezo-electric sensors co-located with the fiber laser sensors. The location of the crack is determined by first estimating time difference of arrival of signals at each sensor using a novel algorithm based on the cumulative distribution transform method with hyperbolic positioning. The fiber laser sensor is shown to match the signal-to-noise ratio of the industry standard (Mistras S9225) piezo-electric acoustic emission sensor.
Development of a novel calorimetry setup based on metallic paramagnetic temperature sensors
Authors: Reifenberger Andreas , Reiser Andreas , Kempf Sebastian , Fleischmann Andreas , Enss Christian
Published: March 2020

We have developed a new micro-fabricated platform for the measurement of the specific heat of low heat capacity mg-sized metallic samples, such as superconductors, down to temperatures of as low as 10 mK. It addresses challenging aspects of setups of this kind such as the thermal contact between the sample and platform, the thermometer resolution, and an addenda heat capacity exceeding that of the samples of interest (typically nJ/K at 20 mK). The setup allows us to use the relaxation method, where the thermal relaxation following a well defined heat pulse is monitored to extract the specific heat. The sample platform (5 × 5 mm2) includes a micro-structured paramagnetic Ag:Er temperature sensor, which is read out by a dc-superconducting quantum interference device via a superconducting flux transformer. In this way, a relative temperature precision of 30 nK/Hz can be reached, while the addenda heat capacity falls well below 0.5 nJ/K for T < 300 mK. A gold-coated mounting area (4.4 × 3 mm2) is included to improve the thermal contact between the sample and platform.
Modeling composed nanoparticles of chitosan-N-acetylene-L-cysteine with support vector regression
Authors: Nan Xueyan , Shi Weidong , Wang Jun , He Liang , Wang Tong , Yang Huilin , Hu Wei , Lin Jun , Bai Pengli
Published: March 2020

The process of nanoemulsion was improved by optimizing the concentration of chitosan-N-acetylene-L-cysteine and sodium tripolyphosphate and the volume ratio between the two components. The prepared formulations were characterized in terms of particle size. Support vector regression (SVR) was built up and used to identify the parameters which could influence the particle size of the nanoemulsion. Data were divided into calibration and validation sets and then were modeled by SVR. It was found that the developed model was of high quality. This model was then used to explore the effect of composition and processing factors on the particle size of the nanoemulsion preparation. This study demonstrated that the SVR model may be used to optimize critical parameters to control preparation of this system and to obtain a dominant factor to control the final particle size.