bluuebunny/crossref_metadata_2025_split huggingface dataset:
Definition and approximation of the light flux degradation of a LED lamp
Authors: Solyonyj S V , Rabin A V , Solenaya O Ya , Kuzmenko V P , Rysin A V 
Published: January 2020

Abstract
Quality control is one of the main functions of the quality management process. Its purpose is an identification of production errors for their prompt elimination and with minimal production losses. The launch of the concept of quality assurance into practice has significantly increased the efficiency of production with a sufficiently high quality of products and services, which has created conditions for the formation of a global market for goods and services. For LED lights luminous flux is the basic parameter that is needed to calculate the illumination of things and to understand the basic parameters of the suitability of the LED lights. In the analyzed articles, the specific time of the beginning of measurements of the luminous flux of the lamp is not given, which is a source of data discrepancies and erroneous results of calculating its light output. Therefore, to eliminate this deficiency in the technical characteristics, the luminous flux should be reduced after a certain stabilization time after power supply. To solve the problem associated with the development of standards for determining the level of degradation of the luminous flux, in this article the technique for predicting the decline of the luminous flux of a LED lamp through the determination of the level of decline in illumination is developed and the approximation of curves is presented.
Integrated diesel engine toxicity reduction system
Authors: Lopatin O P 
Published: January 2020

Abstract
The issues of natural gas application and recirculation as a complex method of reducing the toxicity of diesel exhaust gases are considered. The results of experimental studies on the influence of natural gas and recirculation on the effective characteristics, toxicity and smokiness of exhaust gases are presented. At the same time, special attention is paid to power and economic characteristics, indicators of the combustion process, toxicity and smokiness of exhaust gases. The presented results of experimental studies prove the effectiveness of the application as a comprehensive system of reducing the toxicity of diesel engine natural gas and exhaust gas recirculation.
Research of load modes of diesel engine at work on biofuel
Authors: Likhanov V A , Lopatin O P 
Published: January 2020

Abstract
The relevance of the article is due to the need to replace traditional petroleum motor fuels with alternative ones derived from non-oil raw materials. Quite a good prospect has a variety of alcohol fuels, allowing their physical and chemical properties to use them as additives in regular oil fuel, thereby replacing it and significantly reducing harmful emissions of exhaust gases into the atmosphere. The efficiency of using ethanol and methanol as an ecological additive to petroleum diesel fuel was confirmed and the possibility of a significant reduction in toxicity and smokiness of exhaust gases during diesel operation on biofuel was experimentally proved.
Investigation of the gas feeder design for a fluidized bed chemical reactor or combustor
Authors: Solovev S A 
Published: January 2020

Abstract
In the present work, a model of a gas feeder for the industrial apparatus of the petrochemical or energy industry is constructed. Using the methods of computational fluid dynamics, we calculated the gas motion in the constructed models. Various options for the size and arrangement of the gas feeder elements in the system are considered. The analysis of the calculation results is carried out and the best design options are determined to ensure uniform distribution of the gas velocity to the nozzle of the gas supply system.
Numerical simulation and experimental study of the acetylene hydrogenation reaction
Authors: Khusainov R R , Solovev S A , Soloveva O V , Ilyasov I R 
Published: January 2020

Abstract
A mathematical model of the acetylene hydrogenation reaction is constructed. Numerical modeling and experimental studies of the hydrogenation of acetylene in a reactor with a catalyst based on open cell foam material have been carried out. The results of numerical modeling and experimental studies are in good agreement. The calculation results show that with increasing temperature in the reactor, the mass content of acetylene decreases.
Energy consumption structure and economic growth in the Russian Federation
Authors: Kuznetsova Alfiya 
Published: January 2020

Abstract
Energy consumption is an indicator of the level of economic development in almost any country. Russia is in fourth place in the world in terms of the amount of electricity generated. Between 1990 and 2017, the amount of electric energy consumed in the country increased by one percent, however, the capacity of power plants in the Russian Federation increased by 27.7%. The largest consumption of fuel and energy resources is accounted for by mining (63-70%), production and distribution of energy, gas and water (28-30%), manufacturing (28-29%), transport and communications (21 - 22%), other activities (8%), construction (2.2-3.7%), agriculture (3-3.5%). Four Russian federal districts use over 80% of electric energy: Ural, Siberian, Volga and Central. In the structure of consumption of fuel and energy resources in 2018, the largest share belongs to mining - 53.3%; domestic use of electric energy by urban and rural population - 14.4%; transportation and storage - 8.1%, trade - 3%, agriculture - 1.7%, construction - 1.1%, information and communications - 0.6%, other types of economic activity - 9%. The largest share in the structure of the gross domestic product is occupied by production (26%), wholesale and retail trade (14%) and other. The economic growth of any country is primarily associated with energy consumption.
The impact of the use of compressed natural gas in a car diesel engine on the formation and oxidation of soot particles
Authors: Likhanov V A , Rossokhin A V 
Published: January 2020

Abstract
The problems of using compressed natural gas in diesel as an alternative fuel and reducing the content of harmful substances in exhaust gases are considered. At the same time, the problems of formation and burning of soot particles in the diesel cylinder during its operation on natural gas and their influence on the combustion process and flame characteristics are considered separately. The results of bench tests on the impact of the use of compressed natural gas on the effective performance, environmental performance and fluidity of exhaust gases are presented. The parameters of the combustion process and heat dissipation characteristics are considered, the values of the mass content of soot in the engine cylinder depending on the angle of rotation of the crankshaft are calculated. The optimal values of the effective parameters, characteristics of the combustion process, toxicity and smokiness of exhaust gases during the operation of diesel on compressed natural gas are determined. Conversion of the considered diesel from oil diesel fuel to compressed natural gas allowed to reduce the content of nitrogen oxides in the exhaust gases by 17.0%, soot in 25 times, carbon dioxide by 10.1%.
The use of ionization sensors to study the combustion process in spark ignition engines
Authors: Smolenskii Victor , Smolenskaya Natalya , Korneev Nikolay , Prus Yuri 
Published: January 2020

Abstract
The article discusses the use of ionization sensors to study the combustion process in spark ignition engines. The results of an experimental study of the combustion process when operating both on gasoline and gas fuel are presented. Correlating dependences are obtained, which show the possibility of diagnosing the combustion process by the ion current of chemionization. The relationship between the amplitude of the ion current and the composition of the mixture, the speed of flame propagation, and the maximum pressure in the cylinder of the engine is revealed.
Mathematical model of solid impurity coagulation processes in liquid suspensions based on random function convolution operation
Authors: Menshov E N 
Published: January 2020

Abstract
Methodology of modeling and identification of mathematical model of process of coagulation of solid impurities in liquid suspensions on the basis of linear mathematical apparatus - convolution of random functions is presented. The non-linearity of the coagulation process is taken into account by the mathematical model of the second level, namely, the time dependence of the weighted random convolution function, which is a characteristic of the type of coagulation and physico-geometric parameters of technical systems for cleaning liquid media. This approach has proven itself in applied problems, provides a solution to the problems of calculating and optimizing cleaning systems for arbitrary initial distributions of the dispersed composition of particles, and is characterized by reduced time and resource costs.
A study of sol gel process parameters on CoCuMnOx selective coating characteristics
Authors: Taha Fatma , El Mahallawy Nahed , Shoeib Madiha 
Published: January 2020

Abstract
This research addresses the effect of process parameters on the optical properties of solar selective coating. The proposed study discusses the deposition of a selective coating of CoCuMnOx onto stainless-steel substrate. The coating was prepared via a sol-gel route and dip coating process. Mechanical adhesion between the coating and the substrate was increased through increasing the surface roughness of the substrate. Four parameters were discussed; precursor concentration, withdrawal rate, number of coating layers and the heat treatment temperature. The best achieved absorptivity was 0.906 in the wavelength range of (200–900 nm) and emissivity was 0.116 in the wavelength range of (2.5–25 μm) for a sample with precursor molar ratio divided by 60, 1.5 cm min−1 withdrawal rate, double coating layer and 450 °C heat treatment temperature. Detailed coating characterization was discussed through XRD, EDX and SEM analysis.
Microstructure and mechanical properties of Fe-ZTA cermet prepared by vacuum hot-pressed sintering
Authors: Sun Daming , Jiang Xiaosong , Sun Hongliang , Song Tingfeng , Luo Zhiping 
Published: January 2020

Abstract
The cermet based on metallic iron with zirconia toughened alumina (ZTA) as the reinforcing phase was prepared by vacuum hot-pressed sintering. The ZTA particles were subjected to electroless nickel plating to improve the interfacial bonding ability of ZTA and Fe matrix. In this paper, after electroless nickel plating, the effects of different particle sizes and different contents of ZTA particles on the grinding properties of Fe-based ZTA (Fe-ZTA) cermets were investigated. The results show that the ZTA particles are tightly bound to the Fe matrix. An interface layer is formed between the ZTA particles and the Fe matrix and it can improve the grinding ability of the Fe-ZTA cermet. By reducing the particle size and the content of ZTA particles, the friction coefficient between Fe-based ZTA cermet and the machined surface can be increased, and the surface roughness of the machined surface will reduce. When the ZTA particle size is F14 and the iron binder content is 40%, the friction coefficient between the Fe-ZTA cermet and the steel bar is 0.4981, the surface roughness of steel bar is 40.164 μm, the grinding ratio is 685.952.
Role of lubricant with a plasticizer to change the glass transition temperature as a result improving the mechanical properties of poly(lactic acid) PLLA
Authors: Alamri Hatem R , El-hadi Ahmed M , Al-Qahtani Saeed M , Assaedi Hasan S , Alotaibi Abdullah S. 
Published: January 2020

Abstract
Poly (lactic acid) (PLLA) is the best important bioplastics derived from renewable resources like blackstrap molasses (sugar beet, date palm and sugar cane). PLLA is brittle and has a low elongation at break, which hinders its applications in the industry. One method to solve this problem is to improve its mechanical properties by adding plasticizers. The PLLA blends were prepared at first by solution blending as a solvent casting method and then melting using a hydraulic hot press. PLLA was blended with a plasticizer (GMS/TA) to obtain a higher ductile of PLLA. The addition of lubricant and plasticizer (GMS/TA) leads to reduce the glass transition temperature (Tg), melting point (Tm), and the cold crystallization temperature (Tcc) in PLLA blends. The mechanical properties of PLLA have been investigated. The results indicated compatibility between PLLA and additives. The elongation at the break of the PLLA blend is stretched 270% with a tensile strength of 16 MPa. The addition of lubricant with the plasticizer leads to sliding the chain of PLLA, which causes to increase the strain. The physical blending has been demonstrated to be an effective technique to obtain an environmentally friendly PLLA blend with good mechanical properties, therefore it can be used in the food packaging sector.
Differences in Microbiota Between Two Multilocus Lineages of the Sugarcane Aphid (Melanaphis sacchari) in the Continental United States
Authors: Holt Jocelyn R , Styer Alex , White Jennifer A , Armstrong J Scott , Nibouche Samuel , Costet Laurent , Malacrinò Antonino , Antwi Josephine B , Wulff Jason , Peterson Gary , McLaren Neal , Medina Raul F 
Published: January 2020

Abstract
The sugarcane aphid (SCA), Melanaphis Sacchari (Zehntner) (Hemiptera: Aphididae), has been considered an invasive pest of sugarcane in the continental United States since 1977. Then, in 2013, SCA abruptly became a serious pest of U.S. sorghum and is now a sorghum pest in 22 states across the continental United States. Changes in insect-associated microbial community composition are known to influence host-plant range in aphids. In this study, we assessed whether changes in microbiota composition may explain the SCA outbreak in U.S. sorghum. We characterized the SCA bacterial microbiota on sugarcane and grain sorghum in four U.S. states, using a metabarcoding approach. In addition, we used taxon-specific polymerase chain reaction (PCR) primers to screen for bacteria commonly reported in aphid species. As anticipated, all SCA harbored the primary aphid endosymbiont Buchnera aphidicola, an obligate mutualistic bacterial symbiont. Interestingly, none of the secondary symbionts, facultative bacteria typically associated with aphids (e.g., Arsenophonus, Hamiltonella, Regiella) were present in either the metabarcoding data or PCR screens (with the exception of Rickettsiella and Serratia, which were detected by metabarcoding at low abundances &lt;1%). However, our metabarcoding detected bacteria not previously identified in aphids (Arcobacter, Bifidobacterium, Citrobacter). Lastly, we found microbial host-associated differentiation in aphids that seems to correspond to genetically distinct aphid lineages that prefer to feed on grain sorghum (MLL-F) versus sugarcane (MLL-D).
Comparison of Polycyclic Aromatic Hydrocarbons Exposure Across Occupations Using Urinary Metabolite 1-Hydroxypyrene
Authors: Koh Dong-Hee , Park Ju-Hyun , Lee Sang-Gil , Kim Hwan-Cheol , Choi Sangjun , Jung Hyejung , Park Donguk 
Published: January 2020

Abstract

Objectives
Polycyclic aromatic hydrocarbons (PAHs) are well-known carcinogens causing lung and skin cancers in exposed workers. Certain occupations, such as coke production, have been associated with high PAH exposure; however, the number of occupations tested to date remains small. Here, we sought to compare PAH exposure across a wide range of occupations based on levels of 1-hydroxypyrene (1-OHP), the urinary exposure surrogate of PAHs.

Methods
We collected urine 1-OHP data from the Korean National Environmental Health Survey (KoNEHS), a nationwide biomonitoring survey. We developed a linear regression model, controlling for sex, age, smoking, and survey cycle, and obtained resulting residuals. Then, we computed the fraction of exceeding the third quartile (Q3) level of residuals for each occupation, which is employed as a relative exposure indicator across occupations.

Results
A total of 15 125 measurements derived from three cycles of KoNEHS were used for analysis. The overall geometric means (GMs) and geometric standard deviation (GSD) of urine 1-OHP levels were 0.16 µg g−1 creatinine and 3.07, respectively. Among the sub-major occupational groups, ‘construction and mining related elementary occupations’ showed the highest fraction (0.45) of exceeding the Q3 level of residuals. Among the minor occupational groups, ‘deliverers’ showed a high fraction (0.42) of exceeding the Q3 level of residuals, which indicates rapidly growing occupations to be addressed.

Conclusions
Our results provide ancillary information regarding PAH exposure across occupations, especially for occupations for which PAH exposure has not been well characterized.
netGO: R-Shiny package for network-integrated pathway enrichment analysis
Authors: Kim Jinhwan , Yoon Sora , Nam Dougu 
Published: January 2020

AbstractSummaryWe present an R-Shiny package, netGO, for novel network-integrated pathway enrichment analysis. The conventional Fisher’s exact test (FET) considers the extent of overlap between target genes and pathway gene-sets, while recent network-based analysis tools consider only network interactions between the two. netGO implements an intuitive framework to integrate both the overlap and networks into a single score, and adaptively resamples genes based on network degrees to assess the pathway enrichment. In benchmark tests for gene expression and genome-wide association study (GWAS) data, netGO captured the relevant gene-sets better than existing tools, especially when analyzing a small number of genes. Specifically, netGO provides user-interactive visualization of the target genes, enriched gene-set and their network interactions for both netGO and FET results for further analysis. For this visualization, we also developed a standalone R-Shiny package shinyCyJS to connect R-shiny and the JavaScript version of cytoscape.Availability and implementationnetGO R-Shiny package is freely available from github, https://github.com/unistbig/netGO.Supplementary informationSupplementary data are available at Bioinformatics online.
GpABC: a Julia package for approximate Bayesian computation with Gaussian process emulation
Authors: Tankhilevich Evgeny , Ish-Horowicz Jonathan , Hameed Tara , Roesch Elisabeth , Kleijn Istvan , Stumpf Michael P H , He Fei 
Published: January 2020

Abstract

Motivation
Approximate Bayesian computation (ABC) is an important framework within which to infer the structure and parameters of a systems biology model. It is especially suitable for biological systems with stochastic and nonlinear dynamics, for which the likelihood functions are intractable. However, the associated computational cost often limits ABC to models that are relatively quick to simulate in practice.

Results
We here present a Julia package, GpABC, that implements parameter inference and model selection for deterministic or stochastic models using (i) standard rejection ABC or sequential Monte Carlo ABC or (ii) ABC with Gaussian process emulation. The latter significantly reduces the computational cost.

Availability and implementation
https://github.com/tanhevg/GpABC.jl.
Superovulation with human chorionic gonadotropin (hCG) trigger and gonadotropin releasing hormone agonist (GnRHa) trigger differentially alter essential angiogenic factors in the endometrium in a mouse ART model†
Authors: Segal Thalia R , Amini Peyvand , Wang Junye , Peters Gregory , Skomorovska-Prokvolit Yelenna , Mainigi Monica A , Goldfarb James M , Mesiano Sam , Weinerman Rachel 
Published: January 2020

Abstract
Gonadotropin-releasing hormone agonists (GnRHa) are used as an alternative to human chorionic gonadotropin (hCG) to trigger ovulation and decrease the risk of ovarian hyperstimulation syndrome. GnRHa is less potent at inducing ovarian vascular endothelial growth factor (VEGF), but may also affect endometrial angiogenesis and early placental development. In this study, we explore the effect of superovulation on endometrial angiogenesis during critical periods of gestation in a mouse model. We assigned female mice to three groups: natural mating or mating following injection with equine chorionic gonadotropin and trigger with GnRHa or hCG trigger. Females were killed prior to implantation (E3.5), post-implantation (E7.5), and at midgestation (E10.5), and maternal serum, uterus, and ovaries were collected. During peri-implantation, endometrial Vegfr1 and Vegfr2 mRNA were significantly increased in the GnRHa trigger group (P &lt; 0.02) relative to the hCG group. Vegfr1 is highly expressed in the endometrial lining and secretory glands immediately prior to implantation. At E7.5, the ectoplacental cone expression of Vegfa and its receptor, Vegfr2, was significantly higher in the hCG trigger group compared to the GnRHa group (P &lt; 0.05). Soluble VEGFR1 and free VEGFA were much higher in the serum of mice exposed to the hCG trigger compared to GnRHa group. At midgestation, there was significantly more local Vegfa expression in the placenta of mice triggered with hCG. GnRHa and hCG triggers differentially disrupt the endometrial expression of key angiogenic factors during critical periods of mouse gestation. These results may have significant implications for placental development and neonatal outcomes following human in vitro fertilization.
The coupling apparatus of the sperm head and tail†
Authors: Wu Bingbing , Gao Hui , Liu Chao , Li Wei 
Published: January 2020

AbstractA strong sperm head–tail coupling apparatus (HTCA) is needed to ensure the integrity of spermatozoa during their fierce competition to fertilize the egg. A lot of HTCA-specific components have evolved to strengthen the attachment of the tail to the implantation fossa at the sperm head. Defects in HTCA formation lead to acephalic spermatozoa syndrome and pathologies of some male infertility. Recent studies have provided insights into the pathogenic molecular mechanisms of acephalic spermatozoa syndrome. Here, we summarize the proteins involved in sperm neck development and focus on their roles in the formation of HTCA. In addition, we discuss the fine structures of the sperm neck in different species from an evolutionary view, highlighting the potential conservative mechanism of HTCA formation.
Infrastructure in the Jungle: Infrastructure and Ideology in the Refugee Camps in Calais and Along the U.S.–Mexico Border
Authors: Erdener Jasmine 
Published: January 2020

Abstract
This article examines infrastructures as a tool for managing populations, specifically migrants and refugees, and more broadly, infrastructure as a communicative trope for social belonging and citizenship. Infrastructure emerges as a key site of ideological contestation. Refugees and their advocates argue that infrastructural breakdowns require greater investment of resources and social care. Opponents point to infrastructural breakdowns as evidence that refugees and migrants do not belong and are a drain on national resources. Through a comparative case study analysis of the refugee camp in Calais, France, and at the U.S.–Mexico border, this article argues that infrastructure and infrastructural breakdowns mediate and communicate claims to territory, political recognition, and legitimacy.