bluuebunny/crossref_metadata_2025_split huggingface dataset:
Slabs for Prefabricated Road Surfaces with the Least “Keyboard” Effect
Authors: Zinevich S. I. , Кayumov A. К. 
Published: June 2022

The paper studies the issue of improving the evenness of the prefabricated concrete pavement by changing the design of the slabs from which it is assembled. Irregularities of the prefabricated pavement mainly occur at the junction of the plates and are called “keyboard” effect. The reason for the unevenness is the vertical movement of the ends of the plates relative to each other when the car passes. In order to correct this situation, the authors propose to arrange transverse ribs of rectangular cross section at the ends of the plates. Such ribs will create a reliable support at the edges of the slab, which will reduce the vertical movement of its ends. To determine the effectiveness of the use of transverse ribs, a concrete slab with dimensions of 3´6 m has been examined in the paper. The transverse rib in cross section had the shape of a rectangle with sides 20´10 cm. In order to compare the test results, a concrete slab of the same dimensions, but without transverse ribs, has been studied. Deformations and stresses of the slab under load have been determined by the finite element method using the Lira software package. Calculations have shown the effectiveness of the slabs with transverse ribs mounted on its edges. The vertical displacements of the ends of the slabs with ribs are two times less than those of the slabs without ribs, and the stresses are 2.4 times less. It is obvious that the use of concrete slabs with transverse ribs at the ends will reduce the unevenness of the prefabricated coating at the points of their mating.
About One Variational Problem, Leading to а Biharmonic Equation, and about the Approximate Solution of the Main Boundary Value Problem for this Equation
Authors: Meleshko I. N. , Lasy P. G. 
Published: June 2022

. Many important questions in the theory of elasticity lead to a variational problem associated with a biharmonic equation and to the corresponding boundary value problems for such an equation. The paper considers the main boundary value problem for the biharmonic equation in the unit circle. This problem leads, for example, to the study of plate deflections in the case of kinematic boundary conditions, when the displacements and their derivatives depend on the circular coordinate. The exact solution of the considered boundary value problem is known. The desired biharmonic function can be represented explicitly in the unit circle by means of the Poisson integral. An approximate solution of this problem is sometimes foundusing difference schemes. To do this, a grid with cells of small diameter is thrown onto the circle, and at each grid node all partial derivatives of the problem are replaced by their finite-difference relations. As a result, a system of linear algebraic equations arises for unknown approximate values of the biharmonic function, from which they are uniquely found. The disadvantage of this method is that the above system is not always easy to solve. In addition, we get the solution not at any point of the circle, but only at the nodes of the grid. For real calculations and numerical analysis of solutions to applied problems, the authors have constructed its unified analytical approximate representation on the basis of the known exact solution of the boundary value problem while using logarithms. The approximate formula has a simple form and can be easily implemented numerically. Uniform error estimates make it possible to perform calculations with a given accuracy. All coefficients of the quadrature formula for the Poisson integral are non-negative, which greatly simplifies the study of the approximate solution. An analysis of the quadrature sum for stability is carried out. An example of solving a boundary value problem is considered.
National innovative ecosystem as a platform for the country’s social-economic development
Authors: Danilina Ya. V. , Rybachuk M. A. 
Published: June 2022

Objective: to improve approaches to forming a strategy for the development of a national innovation system.Methods: the work uses a set of methods and approaches, such as the system economic theory, the space-time analysis andsynthesis.Results: the results of the implementation of the Strategy of Innovative Development of the Russian Federation until 2020 was analyzed, which enabled to formulate conclusions about the low efficiency of the results of its implementation. The essence of the national innovation ecosystem and the approaches to its formation were determined. The necessity of applying the ecosystem approach in the formation of the national innovation system is substantiated, recommendations on the system economic theory application in building an integrated national innovation ecosystem are presented. An approach to the organization of the national innovation system as a quadruple helix is proposed, which will ensure the connectivity of its components. The analysis of the possibilities of using digital technologies to develop innovative connections based on ecosystem principles is carried out.Scientific novelty: it consists in the application of systemic economic theory and ecosystem principles that allow taking into account the institutional and socio-economic conditions specific to Russia for the development of the national innovation system.Practical significance: the research results presented in the article can be used to create a strategy for the innovative development of the Russian Federation for the future, as well as for the development of the national innovation system as a whole.
Factors of success of priority investment projects in the sphere of forest exploitation in Russia: econometric analysis
Authors: Ivantsova E. D. , Pyzhev A. I. 
Published: June 2022

Objective: to identify the factors that determined the success of investment projects in the field of forest development on the basis of available information about the enterprises – applicants for such projects.Methods: regression analysis of binary choice models, logistic regression.Results: the key constraints of the development of the Russian forest sector are identified. The review of the most relevant scientific research on the topic of investments into forest complex is carried out. Taking into account the identified problems and the analysis of the global experience in solving them, the most promising mechanism in this context was identified – that is, state support for investment projects from the priority list in the field of forest development. Based on a sample of 200 projects, a logit regression model was evaluated, which determines the impact of project parameters on the probability of their successful implementation. The hypothesis that there is a statistically significant impact on the success of investment projects was confirmed for a number of factors: the average revenue and average cost of fixed assets of the enterprise, the absence of employees in the organization, the connection of the enterprise with foreign capital and the fact that the enterprise has been unprofitable for the past three years.Scientific novelty: for the first time, estimates were made of the contribution of the forest complex enterprises’ characteristics to the probability of successful implementation of priority investment projects in the field of forest development.Practical signifi : the high predictive ability of the model allows using information about the project success determinants to adjust the mechanism for providing support, which will enable to increase the share of successfully implemented projects and therefore increase the effectiveness of this measure of stimulating investment in the development of the Russian forestry industry.
Low-Power SRAM Cell and Array Structure in Aerospace Applications: Single-Event Upset Impact Analysis
Authors: Gavaskar K , Sivaranjani P , Elango S , Raja G Nirmal 
Published: June 2022

Abstract
One of the most critical functions of a computer is memory, as it would be impossible for it to function efficiently without it. The main memory of a computer is known as Random Access Memory (RAM). It stores operating system software, applications, and other data for the central processor unit (CPU) to perform operations swiftly and efficiently. Unfortunately, traditional static RAM (SRAMs) in aerospace applications suffers from high soft error issues such as Single Event Upset (SEU). To overcome the soft error problems, many Radiation-Hardened-Based Designs (RHBD) and Radiation-Hardened-Polar Designs (RHPD) have been developed, such as 12T We-Quatro, twelve-transistor (12T) Dice SRAM cells, and so on. However, they consume more total and static power, as well as have more delay and area. In this article, an RHPD and RHBD 12T SRAM cell is proposed to reduce power dissipation and area overhead. Compared to RHPD, the RHBD 12T SRAM cell devours less total and static power, and RHPD cells have less delay. The proposed SRAM cell is implemented in the 32 x 32 array architecture. The power consumption of a 32 x 32 SRAM array with a 12T RHBD SRAM cell is 1.33mW, which is 10.1% less than a 32 x 32 SRAM array with a 12T RHPD SRAM array is 4.23mW. Cadence virtuoso 6.1.5 at 45 nm Generic Process Design Kit (GPDK) technology file is used to simulate the comparative analysis for the SRAM cell.
Characterization of the bacterial microbiome of Amblyomma scalpturatum and Amblyomma ovale collected from Tapirus terrestris “Tapir” and Amblyomma sabanerae collected from Chelonoidis denticulate “Motelo”, Madre de Dios- Peru
Authors: Rojas-Jaimes Jesús , Lindo-Seminario David , Correa-Núñez Germán , Diringer Benoit 
Published: June 2022

Abstract
Background
Ticks are arthropods that can host and transmit pathogens to wild animals, domestic animals, and even humans. The microbiome in ticks can play different roles such as endosymbiont, pathogenic, and even unknowning.
Results
The bacterial microbiome of adult males Amblyomma scalpturatum and Amblyomma ovale ticks (GARS) collected from Tapirus terrestris, captured in the rural area of San Lorenzo Village and males Amblyomma sabanerae (GART) collected from Chelonoidis denticulate area of Gamita Farm in the Amazon region of Madre de Dios, Peru, was evaluated using metagenomics. The Chao1 and Shannon–Weaver analyses indicated greater bacterial richness and diversity in males ticks (GART; 613.65–2.03) compared males ticks (GARS; 102.17–0.40). Taxonomic analyses identified 478 operational taxonomic units representing 220 bacterial genera in GART and 86 operational taxonomic units representing 28 bacterial genera in GARS. Of the most prevalent genera, was Francisella (73.2%) in GART and Acinetobacter (96.8%) in GARS to be considered as the core microbiome of Amblyomma sabanerae and Amblyomma scalpturatum/ Amblyomma ovale respectively.
Conclusions
We found a high bacterial diversity in male of A. sabanerae collected from C. denticulate showed prevalence of Francisella and prevalence of Acinetobacter in male A.scalpturatum/A. ovale collected from T. terrestris .The greatest bacterial diversity and richness was found in males A. sabanerae. This is the first bacterial metagenomic study performed in A.scalpturatum/A. ovale and A. sabanerae collected from T. terrestris and C. denticulate in the Peruvian jungle.
New structure for an all-optical logic gate based on hybrid plasmonic square-shaped nanoring resonators and strips
Authors: Abdulwahed Saif H. , Wadday Ahmed Ghanim , Sattar Sinan M. Abdul 
Published: June 2022

Abstract
Seven all-optical logic gates based on hybrid plasmonic squared-shaped nanoring resonators and strips are proposed, designed, and numerically analyzed using Finite Element Method (FEM) with COMSOL software package. Constructive and destructive interferences between the input port(s) and the control port(s) are the main operating principles used to produce the proposed gates. The ratio of output optical power to the input power at a single port which is called the transmission threshold is selected to be 30% and the resonance wavelength is 1310 nm. All the hybrid plasmonic logic gates are performed in a single structure of 400nm x 400 nm dimensions and the performance is measured according to the values of transmission at the output port versus a wavelength range from 800 nm to 2000 nm, contrast ratio, modulation depth, and insertion loss. The transmission exceeds 100% in five gates, 146% at NOT and NAND gates, 202.3% at OR, AND, and XNOR gates. The modulation depth scores are 99.75% at the XNOR gate, 98.5% at the NOR gate, 97.67% at OR, AND, NOT, and NAND gates, and 95.29% for the XOR gate.
One-way freezing method to construct MWCNTs/BC framework in melamine foam for composite phase change materials applied in thermal management and energy conversion
Authors: Chu Yao , Wang Yibo , Min Shiru , Xue Weijia , Huang Fenglin , Cai Yibing 
Published: June 2022

Abstract
Latent heat storage (LHS) possesses a great energy storage density, which can reduce the pressure of imbalance between energy consumption and supply. As a commonly used medium for LHS, phase change materials (PCMs) have received growing attentions. However, some inherent defects limit further applications of PCMs. In this work, a flexible porous framework was constructed using the melamine foam (MF) as the template and the multi-walled carbon nanotubes (MWCNTs)/bacterial cellulose (BC) hybrids as the filler, then the PEG was encapsulated to fabricate the composite PCMs. Herein, we investigated the microstructure and flexibility of the three-dimensional (3D) porous matrix, and the microscopic morphology, encapsulation capacity, heat storage/release behavior, temperature regulation ability and light to thermal conversion performance of the composite PCMs were also studied. Experimental results suggested that the prepared 3D skeleton had ultra-light characteristics and outstanding resilience performance. The involvement of BC increased the specific surface area of the MF skeleton, thus its adsorption to PCMs was more stable. The thermal energy storage efficiency of composite PCMs was as high as 91.5%. Meanwhile, the composite PCMs performed sensitive thermal response behavior and could generate shape memory driven by heat. Furthermore, it showed excellent light to thermal conversion performance, with a corresponding conversion efficiency of 87.9%. This study provides a new idea for the design and development of advanced composite PCMs, which is expected to expand the applications of PCMs in heat storage, energy conversion and solar energy utilization.
Assessing Relational Coordination in a Clinical Skills Program during the COVID-19 Pandemic
Authors: Alfazari Ali S. , Ali Hebatallah A. Naim , Alessa Awad , Magzoub Mohi Eldin 
Published: June 2022

Abstract
Background.The global spread of the COVID-19 virus caused unprecedented interruptions in medical education. This paper evaluates Relational Coordination: communicating and relating for task integration; between the distinct roles responsible for delivering clinical teaching during the peak of the pandemic.Methodology.Using a cross-sectional design, this study assesses Relational Coordination between twelve groups within a Clinical Skills Program at a Medical School in the United Arab Emirates. It also measures three relevant well-being dimensions: namely, Job satisfaction, Work Engagement, and Burnout.Results. Overall, RC scores were moderate (3.65 out of 5.00) and were found to positively and significantly increase both job satisfaction (β = 1.1, p < 0.001) and work engagement (β = 0.8, p < 0.01). While being marginally associated with lower burnout (β=-0.5, p = 0.08). Fifty percent of participants experienced high job satisfaction, with a mean score of 5.0 out of 7.0, while 73% reported being enthusiastic about their job, with a mean score of 6.0 out of 7.0. About a third of participants (27%) reported feeling burnout.Conclusions.During times of disruption and crisis, medical education can benefit from higher levels of relational coordination. Our study shows the significant impact of relational coordination on well-being measures like job satisfaction and work engagement. To achieve favorable outcomes, and maintain academic excellence, we recommend six interventions to improve relational coordination in Clinical Skills Programs, focusing on improving communication, work processes, regular meetings, education innovations, capacity building, and the establishment of coaching and counseling programs for students and faculty.
The role of SIRT1 level and SIRT1 (rs3818292, rs3758391, rs7895833) gene polymorphisms in patients with optic neuritis and multiple sclerosis
Authors: Kubiliute Aleksandra , Gedvilaitė Greta , Vilkeviciute Alvita , Kriauciuniene Loresa , Bruzaite Akvile , Zaliuniene Dalia , Liutkeviciene Rasa 
Published: June 2022

Abstract
The aim: To investigate the role of SIRT1 level and SIRT1 (rs3818292, rs3758391, rs7895833) gene polymorphisms in patients with optic neuritis (ON) and multiple sclerosis (MS).Methods: We studied 79 patients with ON and 225 healthy subjects. We divided ON patients into 2 subgroups: patients with MS (n=30) and patients without MS (n=43). 6 ON patients did not have sufficient data for MS diagnosis and were excluded from subgroup analysis. The subjects' DNA was extracted from peripheral blood leukocytes and genotyped by real-time polymerase chain reaction. Results were analyzed using the program "IBM SPSS Statistics 26.0".Results: We discovered that SIRT1 rs3758391 was associated with a 2-fold increased odds of developing ON under the codominant (p=0.007), dominant (p=0.011), and over-dominant (p=0.008) models. Also, it was associated with a 3-fold increased odds ofON with MS development under the dominant (p=0.010), 2-fold increased odds under the over-dominant (p=0.032) models and a 1.2-fold increased odds of ON with MS development (p=0.015) under the additive model. We also discovered that the SIRT1 rs7895833 was significantly associated with a 2.5-fold increased odds of ON development under the codominant (p=0.001), dominant (p=0.006), and over-dominant (p<0.001) models, and a 4-fold increased odds of ON with MS development under the codominant (p<0.001), dominant (p=0.001), over-dominant (p<0.001) models and with a 2-fold increased odds of ON with MS development (p=0.013) under the additive genetic model. There was no association between SIRT1 levels and ON with/without MS development.Conclusions: We discovered that the SIRT1 rs3758391 and rs7895833 polymorphisms are associated with ON and ON with MS development.
On the effective organization of rural settlements spatial structure under the transformation and development of mountainous areas in Western China: evaluation measurement based on complex adaptability theory
Authors: Long Xiang , Yang Peifeng , Su Qingmu 
Published: June 2022

Abstract
The vast majority of rural settlements in Western China are located in the ecologically sensitive and diverse mountainous environment, which also experienced rapid changes in policy and institutional interventions over the past 40 years. At present, in the transitional period of "post-poverty alleviation", they have more opportunities to re-integrate themselves into the large regional development. However, there is a lack of systematic evaluation and cognition of the related functions of the spatial structure between the settlements at the regional village scale and town scale. Therefore, in this paper, the theory of complex adaptive system and its analytical NK model were introduced, and a quantitative measurement framework was constructed for the adaptability level of this kind of rural settlement spatial structure organization, so as to explore the effective path for its global optimization. Taking Xinglong Town of Chongqing in the western mountainous area as an example, it was found from the analysis that: (1) The number of villages at high comprehensive adaptation level has increased over time, which has an obvious positive correlation with the construction of transportation network, and a structural adsorption effect. (2) The spatial structure of the rural settlement system in the region has changed from weak industrial nodes - traffic single branch connection - public service decentralized coverage in 2010 to the organizational adaptation characteristics of stable industrial agglomeration - traffic expansion and extension - public service continuous coverage in 2019. (3) The spatial elements related to industry and public service in each village have an increasingly significant impact on the reconstruction and differentiation of its spatial structure. Finally, based on the changing trend of adaptability level and the correlation characteristics of regional space, in this paper, the spatial structure optimization strategy of Xinglong Town is put forward, which provides a reference basis for the coordinated development of town and village space under the township level planning in the western region.
Characterization of steel lined with multilayers of micro/nano-polymeric composites
Authors: Megahed M. , Saber D. , El-Aziz Kh. Abd 
Published: June 2022

Abstract
A more cost-effective method to prevent steel structures from degradation is coating. This study investigated a comparison between different configurations of three multilayers polymeric coating on both sides of steel. Epoxy filled with 1 wt%, 2wt%, and 3wt% micron or nano-sized alumina (Al2O3) particles represents the coating layers to steel on both sides. Mechanical and barrier resistance properties were conducted on the micro/nanocomposite coated specimens and compared with pure epoxy coated specimens. Barrier resistance was performed by immersing the lined steel specimens in salt solution and in citric acid medium. Adding alumina (Al2O3) particles in micron and nano size to epoxy coatings improves the barrier resistance, the tensile and hardness under dry and wet conditions as compared to pure epoxy coating. The maximum improvement of the tensile strength and barrier resistance was attained with the addition of 1wt% Al2O3 nanoparticles. Further increases in Al2O3 micro/nanoparticles cause deterioration in tensile strength and barrier resistance. Good properties were observed with stepwise graded micro/nanocomposite coatings. However, the maximum improvement of hardness under dry and wet conditions improved with the further addition of 3wt% Al2O3 nanoparticles to epoxy coatings.