bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computer modelling of heat energy regeneration process in a reversible heat exchanger
Authors: Naimov Alijon , Sinitsyn Anton , Vetyukov M M , Palmov V A , Kosmach V F , Titovec Yu F , Akhmetova I G 
Published: November 2019

Abstract
The article considers approbation of the developed mathematical model of the process of thermal energy accumulation in a stationary switching regenerative heat exchanger using the Matlab computer system. The model was constructed and numerically investigated using a difference scheme. This method is necessary for development of algorithms for calculating the thermal characteristics of heat and mass transfer processes under conditions of regeneration and phase transitions, as well as for analyzing the criteria for optimal control of the operation of this apparatus under nominal and critical environmental conditions.
Improving methods for identifying electric motor parameters in case of stator winding damage
Authors: Alyunov A N , Vyatkina O S , Ivanov V N , Karpov Yu G , Melehin V F , Andreev A M , Mukhametova L R 
Published: November 2019

Abstract
A method is proposed for estimating the parameters of electric motors. It has new properties that increase the sensitivity and efficiency in terms of detecting internal short circuits in the windings of controlled electric motors in non-stationary conditions.
Innovative technology for dismantling the windings of electric motors using ultrasonic radiation
Authors: Nemirovskiy A E , Kashin A I , Kosmach V F , Titovec Yu F , Toptygin I N , Zaripova D A 
Published: November 2019

Abstract
The use of ultrasonic radiation showed an advantage over the existing methods of dismantling the windings of electric motors (EM). The method is based on the cavitation impact of ultrasonic vibrations and the capillary effect, which helps the caustic soda solution (NaOH) to quickly penetrate into the thickness of the lacquer impregnation and contribute to the destruction of the insulation from the inside. Analysis of dismantling of EM windings on the basis of ultrasound was carried out by the method of active experiment planning. As a result, a mathematical model of the process of removing the “burnt” EM winding was obtained, and the optimal parameters of power and duration of ultrasound, the temperature and the concentration of the NaOH solution were determined. Asynchronous electric motors (AEM) are the most widespread receivers of electrical energy. To ensure reliable and trouble-free operation of the AEM as a part of technological processes, it is necessary to implement completely new methods for their protection with the possibility of preventive action, carrying out continuous monitoring of motor parameters. In contrast to the systems of classical protection, which are triggered by faults, the system being developed makes it possible to avoid severe emergencies by predicting and detecting damages at an early stage.
Study of the temperature mode of a tunnel kiln using new Celsius© thermal sensors
Authors: Sinitsyn Anton , Belyanskiy Dmitry , Kiyatkin R P , Loshchakov I I , Mamaev Yu A , Zaripova D A 
Published: November 2019

Abstract
The paper proposes a new approved system for control and monitoring of the working process parameters during production of building ceramic bricks for modern enterprises. We analyzed various devices for measuring the raw brick temperature, and identified the shortcomings of the existing instruments and measuring systems. To create high production efficiency, increase the competitiveness of products on the market, reduce the product cost as part of automation of long-term and energy-intensive technological processes, we proposed a method of organizing optimal control of drying process of ceramic bricks at the industrial plant using new Celsius © thermal sensors. A digital temperature sensor is used as a sensitive element, which eliminates the need for calibrating the primary transducer. The device can be installed on the object of examination using a threaded connection, magnetic mounting, or can be used to measure the temperature at the required depth due to remote primary measuring transducer. It is shown that device is universal and will be efficient for the needs of enterprises for which the control of thermodynamic parameters is the basis of the technological process.
Photobioreactors for microalga Chlorella Sorokiniana cultivation
Authors: Politaeva N , Smyatskaya Yu , Timkovskii A L , Lezhnev E I , Polyanskii V A , Timofeev A N , Tulub A A , Zaripova D A , Lopicheva O G 
Published: November 2019

Abstract
This work presents various constructions of photobioreactors for microalgae Chlorella Sorokiniana cultivation. We studied dependence of biomass production rate on photobioreactor construction. We suggest special photobioreactor construction for pilot-scale biomass production. We explored the ways to use the obtained biomass as a source for lipids and carotinoids. We recommend to use waste biomass for obtaining of sorption materials for water purification. The spent sorption materials may be used as a co-substrate for fermentation of organic wastes.
A new approach for recycling of spent activated sludge
Authors: Politaeva N , Prokhorov V , Lezhnev E I , Polyanskii V A , Matisov B G , Mukhametova L R , Mukhin I A 
Published: November 2019

Abstract
The paper presents the basic methods of disposal and recycling of waste activated sludge. We propose a new technology of neutralization of waste activated sludge and subsequent disposal in the form of an adsorbent for cleaning oil-contaminated wastewater and production of complex fertilizers, allowing to intensify the process of phytoremediation of soils from oil.
Flexible allocation of costs between electricity and heat as a factor for improving the CHP competitiveness
Authors: Sukhareva E , Fedyukhin A V , Kikot E A , Matisov B G , Nikitkov N V , Izrantsev V V , Knorring V G , Kondrashkova G A , Akhmetov T R , Sinitsyn A A 
Published: November 2019

Abstract
The review of cost allocation methods when forming cost of energy with the combined production was carried out. Their strengths and weaknesses were revealed. The article is devoted to the development of the distribution system costs in the form of energy cost.
Improvement of energy efficiency of motor fuel production at oil refinery
Authors: Markov V , Fedyukhin A , Sultanguzin I , Matisov B G , Nikitkov N V , Izrantsev V V , Knorring V G , Konrashkova G A , Mukhametova L R 
Published: November 2019

Abstract
This work presents a complex of technological solutions aimed at possible improvement of performance efficiency of oil refinery plants. These technological solutions are based on the control mechanisms of consumer material-heat balance for obtaining an optimum balance between fractionating accuracy of the obtained distillates, process energy characteristics and increase of the thermal energy integration at the plant. At this the proposed solutions do not provide the changes of the basic plant equipment, and no significant capital investments should be made for its implementation.
Egypt and nuclear energy: aspects, reasons and future
Authors: Cauich-López D A , Payan L F Barrera , Abdelhalim A M N , Izrantsev V V , Knorring V G , Kondrashkova G A , Pankratov Yu M , Mukhametova L R , Sinitsyn A A 
Published: November 2019

Abstract
This article tries to give an analysis of the current energy situation in Egypt and to the Egyptian nuclear program giving a spot light on the history of the nuclear program and the reasons that made the nuclear energy a possible and applicable solution to the energy problems in Egypt. Also, it shows the Russian – Egyptian cooperation in the field of nuclear energy and the role of the Russian side in development of the Egyptian nuclear program
Investigation of gas fuel combustion efficiency at magnetic field treatment
Authors: Sinitsyn A , Rusakov D , Izrantsev V V , Kravchenko S A , Konrashkova G A 
Published: November 2019

Abstract
This paper presents an investigation of gas fuel combustion efficiency at magnetic field treatment. Equipment used for magnetic fuel activation is analyzed. Basing on the conducted analysis, the authors developed a laboratory setup and special technique for investigation of magnetic field impact on gas fuel characteristics during its combustion. The obtained experimental results are presented.
Aluminum-based composite reinforced with fullerene soot
Authors: Yunusov F. , Bobrynina E. , Ma T. J. , Larionova T. , Okrepilov M. , Mazin V. , Kravchenko S. , Yakovlev V. , Chulkin S. , Zaripova D 
Published: November 2019

Abstract
Al-based composites with fullerene soot have been successfully prepared using powder metallurgy route. The selected parameters of the powder preparation for extrusion are discussed. The microstructure and phase composition are analyzed by optical microscopy and XRD analysis. It is shown that carbon reacts with Al with very fine carbide particles formation, resulting in micro stress of the aluminum matrix, and providing high strength of the composite. The obtained composites have excellent strength characteristic (660MPa) and satisfactory ductility (4.5%). It was shown that the developed Al-based composites can successfully compete with the best aluminum alloys used for electrical wire production.
Local buckling of box-shaped beams due to skew bending
Authors: Manzhula K. , Naumov A. , Sokolov S. , Okrepilov M. , Kravchenko S. , Kondrashkova G. , Shashikhin V. , Yakovlev V. , Chulkin S. , Mukhametova L 
Published: November 2019

Abstract
Local buckling efficiency of different types of beams was reviewed. For beams with non-linear walls and parameterized geometry local buckling analysis was made in ANSYS. Based on the results of ANSYS calculation analytic formula was evaluated in MathCAD using the least square method. Analysis of the influence of different geometrical parameters on local buckling stress value for beams with non-linear walls was completed.
Nanocomposite antifriction molybdenum disulfide (filler) – silicon oxide (matrix) coatings
Authors: Alexandrov S. , Tyurikov K. , Breki A. , Kondrashkova G. , Shashikhin V. , Matisov B. , Mamaev Y. , Timofeev A. , Burdakov S. , Zaripova D A 
Published: November 2019

Abstract
It was demonstrated experimentally that the spatial separation of two processes of chemical vapor deposition, one of which provides synthesis of filler (MoS2) nanoparticles and the other yields the matrix (SiO2) of the nanocomposite coating, performed in a common reactor, enables an independent control over two process rates and makes it possible to widely vary the composition of the films deposited in this way. The deposition was performed in a double-zone vertical tubular quartz reactor. Molybdenum disulfide particles were produced by pyrolysis of aerosols of ammonium thiomolybdate solutions in dimethylformamide in the upper zone of the reactor, and the plasma-chemical deposition of a nanocomposite coating occurred in the lower zone into which MoS2 nanoparticles were transported by the gas flow and tetraethoxysilane was delivered. It was shown that the nanocomposite coatings composed of molybdenum disulfide (filler) and silicon oxide (matrix) possess improve the antifriction properties as compared with the matrix (SiO2 layers), these properties being determined by the relative amounts of MoS2 nanoparticles in the layer and by their average size.
Aerosol-assisted chemical deposition of nanocomposite material in the “iron-carbon-oxygen” system
Authors: Tyurikova I. , Alexandrov S. , Tyurikov K. , Murashkin S. , Baron Y. , Kosmach V. , Loshchakov I. , Pankratov Y. , Burdakov S. , Mukhametova L R 
Published: November 2019

Abstract
The process based on aerosol chemical deposition of a composite with a carbon matrix and iron oxide nanoparticles incorporated therein was developed. O-xylene is proposed as the source of carbon, and stabilized and unstabilized magnetic fluid based on water or dimethylformamide - source of nanoscale iron oxide. The proposed method allows to obtain composite materials of various types with several directions of growth.
Daily Associations between Child and Parent Psychological Factors and Home Opioid Use in Youth with Sickle Cell Disease
Authors: Stone Amanda L , Williams Zaria , McNaull Melissa , Wilson Anna C , Karlson Cynthia W 
Published: November 2019

AbstractBackgroundOpioid analgesics are frequently used in the home setting to manage episodic pain in youth with sickle cell disease (SCD). Given the risk of adverse side effects, including constipation and sedation, understanding factors associated with at-home opioid use is important for maximizing pain relief while minimizing negative side effects.PurposeThe present study aimed to evaluate the relationship between individual psychological factors (pain catastrophizing and negative affect), caregiver psychological factors (catastrophizing about child’s pain and caregiver negative affect), and home opioid use in youth with SCD.MethodsYouth with SCD (n = 32) and a caregiver (n = 28) recruited during a routine outpatient hematology visit completed electronic 14 day diaries assessing pain, opioid use, and psychological factors.ResultsApproximately 28% of youth (n = 9) reported pain ≥50% of diary days and a third of youth (n = 11, 34%) used opioid analgesics at least one of the diary days. The number of days opioid analgesics were used ranged from 0 to 7 (50% of diary days). Results from generalized linear mixed models indicated greater child negative affect accounted for increased odds of opioid use on a given day when accounting for pain intensity. Greater caregiver catastrophizing about children’s pain was also associated with increased odds of children’s opioid use.ConclusionsChild and parent psychological factors relate to child opioid use at home for SCD-related pain. Future research is warranted in larger samples to identify targets for interventions to enhance pain management while reducing opioid-related risk and side effects.
Impact of Chronic Medical Condition Development on Longitudinal Physical Function from Mid- to Early Late-Life: The Study of Women’s Health Across the Nation
Authors: Lange-Maia Brittney S , Karvonen-Gutierrez Carrie A , Kazlauskaite Rasa , Strotmeyer Elsa S , Karavolos Kelly , Appelhans Bradley M , Janssen Imke , Avery Elizabeth F , Dugan Sheila A , Kravitz Howard M 
Published: November 2019

Abstract

Background
Chronic medical conditions (CMCs) often emerge and accumulate during the transition from mid- to late-life, and the resulting multimorbidity can greatly impact physical function. We assessed the association of CMC presence and incidence on trajectories of physical function from mid- to early late-life in the Study of Women’s Health Across the Nation.

Methods
Physical function was assessed at eight clinic visits (average 14 years follow-up) using the physical function subscale of the Short Form-36. CMCs included osteoarthritis, diabetes, stroke, hypertension, heart disease, cancer, osteoporosis, and depressive symptomatology, and were considered cumulatively. Repeated-measures Poisson models estimated longitudinal change (expressed as percent difference) in physical function by chronic CMCs. Change-points assessed physical function change coincident with the development of a new condition.

Results
Women (N = 2,283) followed from age 50.0 ± 2.7 to 64.0 ± 3.7 years; 7.3% had zero CMCs through follow-up, 22.5% (N = 513) had no baseline CMCs but developed ≥1, 22.7% women had ≥1 baseline CMC but never developed another, and 47.6% had ≥1 baseline CMC and developed ≥1 more. Each additional baseline CMC was associated with 4.0% worse baseline physical function and annual decline of 0.20%/year. Women with more baseline CMCs had greater decline in physical function with a new CMC (−1.90% per condition); and annual decline when developing a new condition accelerated by −0.33%/year per condition.

Conclusions
Self-reported physical function changes are evident from mid- to early late-life with the development of CMCs. Preventing or delaying CMCs may delay declines in physical function, and these potential pathways to disability warrant further research.
CAREGIVER TYPE AND ITS ASSOCIATION WITH MORTALITY AMONG OLDER ADULTS WITH DISABILITY IN CHINA
Authors: Wu Chenkai , Li Haoxue , liu Xiaoting , chen honglin 
Published: November 2019

Abstract
A large proportion of older adults in China needs assistance with activities of daily living (ADL). The quality of care for this population has gained growing attention. However, little is known about the patterns of their caregiver type or its association with mortality. We examined the patterns of primary caregiver type among community-dwelling older adults in China and to examine the association between caregiver type and mortality. Data were from the 2005, 2008, and 2011 waves of the China Longitudinal Health and Longevity Study. We included 437 married and 3,971 widowed participants. The average age was 96.7 years (SD=6.9) and 73.7% were female. For married persons, 55.1%, 25.2%, 12.1%, 2.3%, and 3.9% of the primary caregiver was spouse, son/daughter-in-law, daughter/son-in-law, grandchildren, and housekeeper. For widowed persons, 60.2%, 21.1%, 9.9%, and 5.9% of the primary caregiver was son/daughter-in-law, daughter/son-in-law, grandchildren, and housekeeper, respectively. Multivariable-adjusted model showed that, among married older adults, son/daughter-in-law and daughter/son-in-law as the primary caregiver was associated with 41% (95% confidence interval [CI]=6%-87%) and 67% (95%CI=10%-154%) higher mortality than spouse as the primary caregiver, respectively. For widowed persons, daughter/son-in-law and grandchildren as the primary caregiver was associated with 12% (95%CI=3%-20%) and 14% (95%CI=2%-24%) lower mortality than son/daughter-in-law as the primary caregiver, respectively. Majority of disabled older adults in China relied on their spouse and children to care for them. Type of primary caregiver was associated with death in both married and widowed persons. More resources need to be allocated to disabled Chinese older adults with poor survival outcomes.
Comparison of Methyl Bromide and Phosphine for Fumigation of Necrobia rufipes (Coleoptera: Cleridae) and Tyrophagus putrescentiae (Sarcoptiformes: Acaridae), Pests of High-Value Stored Products
Authors: Hasan Md Mahbub , Aikins M Jamie , Schilling M Wesley , Phillips Thomas W 
Published: November 2019

Abstract
Fumigation with methyl bromide has been a long established and effective method for controlling many pests of stored products, including the key major pests that infest dry-cured hams, aged cheese, and other value-added durable stored products. Methyl bromide had been widely used for the disinfestation of dry-cured ham facilities in the United States, but is now phased out of use since it is an ozone-depleting substance. This paper reports laboratory studies to evaluate the efficacies of methyl bromide and phosphine for controlling two of the key arthropod pests of dry-cured hams and aged cheeses. Larvae of the red-legged ham beetle, Necrobia rufipes (Fabricius), were the most tolerant life stages when treated with either phosphine or methyl bromide for 48 h exposure at 23°C, whereas eggs of the mold mite, Tyrophagus putrescentiae (Schrank), were slightly more tolerant than mobile stages for both compounds. Under laboratory conditions, complete control was achieved for the both species with concentrations of 0.85 and 4.0 g/m3 of phosphine and methyl bromide, respectively, at 48 h exposure. The results give new information for judicious use of the existing stocks of methyl bromide, whether for pest mitigation or to help in developing a quarantine treatment schedule with that gas. Phosphine shows good potential as an effective alternative to methyl bromide, but if it was to be adopted as a fumigant in the dry-cured ham industry, methods to prevent metal corrosion would need to be designed and effectively implemented.
WASP-52b. The effect of star-spot correction on atmospheric retrievals
Authors: Bruno Giovanni , Lewis Nikole K , Alam Munazza K , López-Morales Mercedes , Barstow Joanna K , Wakeford Hannah R , Sing David K , Henry Gregory W , Ballester Gilda E , Bourrier Vincent , Buchhave Lars A , Cohen Ofer , Mikal-Evans Thomas , García Muñoz Antonio , Lavvas Panayotis , Sanz-Forcada Jorge 
Published: November 2019

ABSTRACT
We perform atmospheric retrievals on the full optical to infrared ($0.3\!-\!5 \, \mu \mathrm{m}$) transmission spectrum of the inflated hot Jupiter WASP-52b by combining HST/STIS, WFC3 IR, and Spitzer/IRAC observations. As WASP-52 is an active star that shows both out-of-transit photometric variability and star-spot crossings during transits, we account for the contribution of non-occulted active regions in the retrieval. We recover a 0.1–10× solar atmospheric composition, in agreement with core accretion predictions for giant planets, and no significant contribution of aerosols. We also obtain a &lt;3000 K temperature for the star-spots, a measure which is likely affected by the models used to fit instrumental effects in the transits, and a 5 per cent star-spot fractional coverage, compatible with expectations for the host star’s spectral type. Such constraints on the planetary atmosphere and on the activity of its host star will inform future JWST GTO observations of this target.
Perioperative fosfomycin disodium prophylaxis against urinary tract infection in renal transplant recipients: a randomized clinical trial
Authors: Rosado-Canto Rodrigo , Parra-Avila Idalia , Tejeda-Maldonado Javier , Kauffman-Ortega Cristopher , Rodriguez-Covarrubias Francisco T , Trujeque-Matos Mariedel , Cruz-Martínez Rodrigo , Maravilla-Franco Ernesto , Criollo-Mora Elia , Arreola-Guerra José M , Morales-Buenrostro Luis E , Sifuentes-Osornio José 
Published: November 2019

Abstract

Background
Symptomatic urinary tract infection (UTI) is the most common infectious complication in renal transplant recipients (RTRs). Fosfomycin (FOS) is an attractive alternative for prophylaxis because it does not interact with immunosuppressants; although 90% is excreted unchanged in the urine, it does not require adjustment for renal function for single dose prophylaxis.

Methods
RTRs were recruited into this randomized, double-blind, placebo-controlled trial. Participants were randomized (1:1) to receive one 4 g dose of FOS disodium intravenously 3 h (FOS group) or placebo (placebo group) before placement and removal of a urinary catheter and before removal of a double-J ureteral stent. All participants received prophylaxis with trimethoprim/sulfamethoxazole. The main outcome was a comparison of the mean number of symptomatic UTI and asymptomatic bacteriuria (AB) episodes per patient during a 7-week follow-up period. The study was registered at ClinicalTrials.gov, NTC03235947.

Results
Eighty-two participants were included (41 in the FOS group and 41 in placebo group). The mean number of AB or symptomatic UTI episodes per patient was lower in the FOS group [intention-to-treat (ITT) 0.29 versus 0.60, P = 0.04]. The incidence of symptomatic UTI was lower in the FOS group (ITT, 7.3% versus 36.6%, P = 0.001), and there was no difference in the incidence of AB between both groups. The incidence of adverse events was similar in both groups.

Conclusions
FOS addition is an effective and safe strategy to reduce the number of symptomatic UTIs during the first 7 weeks after renal transplant.