bluuebunny/crossref_metadata_2025 huggingface dataset:
A cAMP/CRP-controlled mechanism for the incorporation of extracellular ADP-glucose in Escherichia coli involving NupC and NupG nucleoside transporters
Authors: Almagro Goizeder , Viale Alejandro M. , Montero Manuel , Muñoz Francisco José , Baroja-Fernández Edurne , Mori Hirotada , Pozueta-Romero Javier
Published: October 2018

ADP-glucose is the precursor of glycogen biosynthesis in bacteria, and a compound abundant in the starchy plant organs ingested by many mammals. Here we show that the enteric species Escherichia coli is capable of scavenging exogenous ADP-glucose for use as a glycosyl donor in glycogen biosynthesis and feed the adenine nucleotide pool. To unravel the molecular mechanisms involved in this process, we screened the E. coli single-gene deletion mutants of the Keio collection for glycogen content in ADP-glucose-containing culture medium. In comparison to wild-type (WT) cells, individual ∆nupC and ∆nupG mutants lacking the cAMP/CRP responsive inner-membrane nucleoside transporters NupC and NupG displayed reduced glycogen contents and slow ADP-glucose incorporation. In concordance, ∆cya and ∆crp mutants accumulated low levels of glycogen and slowly incorporated ADP-glucose. Two-thirds of the glycogen-excess mutants identified during screening lacked functions that underlie envelope biogenesis and integrity, including the RpoE specific RseA anti-sigma factor. These mutants exhibited higher ADP-glucose uptake than WT cells. The incorporation of either ∆crp, ∆nupG or ∆nupC null alleles sharply reduced the ADP-glucose incorporation and glycogen content initially witnessed in ∆rseA cells. Overall, the data showed that E. coli incorporates extracellular ADP-glucose through a cAMP/CRP-regulated process involving the NupC and NupG nucleoside transporters that is facilitated under envelope stress conditions.
Stimulus strength determines the BTK-dependence of the SHIP1-deficient phenotype in IgE/antigen-triggered mast cells
Authors: Zorn Carolin N. , Simonowski Anne , Huber Michael
Published: October 2018

Antigen (Ag)-mediated crosslinking of IgE-loaded high-affinity receptors for IgE (FcεRI) on mast cells (MCs) triggers activation of proinflammatory effector functions relevant for IgE-associated allergic disorders. The cytosolic tyrosine kinase BTK and the SH2-containing inositol-5′-phosphatase SHIP1 are central positive and negative regulators of Ag-triggered MC activation, respectively, contrarily controlling Ca2+mobilisation, degranulation, and cytokine production. Using genetic and pharmacological techniques, we examined whether BTK activation inShip1−/− MCs is mandatory for the manifestation of the well-known hyperactive phenotype ofShip1−/− MCs. We demonstrate the prominence of BTK for theShip1−/− phenotype in a manner strictly dependent on the strength of the initial Ag stimulus; particular importance for BTK was identified inShip1−/− bone marrow-derived MCs in response to stimulation with suboptimal Ag concentrations. With respect to MAPK activation, BTK showed particular importance at suboptimal Ag concentrations, allowing for an analogous-to-digital switch resulting in full activation of ERK1/2 already at low Ag concentrations. Our data allow for a more precise definition of the role of BTK in FcεRI-mediated signal transduction and effector function in MCs. Moreover, they suggest that reduced activation or curtate expression of SHIP1 can be compensated by pharmacological inhibition of BTK andvice versa.
Estimation of Horizontal Eddy Heat Flux in Upper Mixed-Layer in the South China Sea by Using Satellite Data
Authors: Pan Jiayi , Sun Yujuan
Published: October 2018

In this study, the horizontal eddy heat flux in the upper mixed-layer in the South China Sea (SCS) is derived from satellite-derived observational data of sea surface height anomalies and optimally interpolated sea surface temperature, as well as a reanalysis dataset of mixed-layer depth. The long-term heat flux shows a northward transport on the west side of the SCS, comparable with that in the Kuroshio extension with strong eddy activities. The eddy flux in the SCS has a prominent semi-annual cycle and becomes the strongest in winter and summer with the inflow flux in the south and the outflow in the northwest into the East China Sea through the Taiwan Strait. The semi-annual cycle is related to the strong semi-annul variabilities of the velocity and the temperature in areas southeast of Vietnam and in the northern SCS, respectively. In some areas of the SCS, the eddy heat flux can reach more than ~ 60% of the mean flow heat flux. The convergence of the eddy flux indicates that heat accumulates southeast of Vietnam, which may result in heat storage increases in the upper mixed-layer.
Photocatalytic degradation of toxic aquatic pollutants by novel magnetic 3D-TiO2@HPGA nanocomposite
Authors: Santhosh Chella , Malathi A. , Daneshvar Ehsan , Kollu Pratap , Bhatnagar Amit
Published: October 2018

In this study, a series of photocatalysts were prepared, namely bare 3D-TiO2 (b-3D-T), magnetic 3D-TiO2: (m3D-T) and magnetic 3D-TiO2@Hierarchical Porous Graphene Aerogels (HPGA) nanocomposite: (m3D-T-HPGA NC) by solvothermal process. The prepared photocatalysts were analyzed by using X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), Vibrating sample magnetometer (VSM), Brunauer–Emmett–Teller (BET) and Diffuse Reflectance Measurement – Ultraviolet (DRS-UV) to know their physical and chemical properties. The photocatalytic degradations of two toxic aquatic pollutants viz., Cr(VI) and bisphenol A (BPA) were tested by using the prepared photocatalysts. Parameters such as initial pollutant concentration, solution pH, photocatalyst dosage, wavelength and light intensity were investigated to optimize the process. The photocatalytic properties of prepared catalyst were analyzed based on the degradation of Cr(VI) and BPA under UV irradiation. The modified photocatalysts showed better performance as compared to b-3D-T photocatalyst. This better performance is ascribed to efficient charge transfer between b-3D-T nanoparticles to the porous graphene sheets. The maximum photocatalytic degradation of Cr(VI) was found to be 100% with m3D-T-HPGA NC within 140 min, whereas a removal efficacy of 100% and 57% was noticed in case of m3D-T and b-3D-T within 200 and 240 min, respectively. In the case of BPA, the maximum degradation efficiency was found to be 90% with m3D-T-HPGA NC within 240 min.
Porcine circovirus 2 (PCV-2) genetic variability under natural infection scenario reveals a complex network of viral quasispecies
Authors: Correa-Fiz Florencia , Franzo Giovanni , Llorens Anna , Segalés Joaquim , Kekarainen Tuija
Published: October 2018

Porcine circovirus 2 (PCV-2) is a virus characterized by a high evolutionary rate, promoting the potential emergence of different genotypes and strains. Despite the likely relevance in the emergence of new PCV-2 variants, the subtle evolutionary patterns of PCV-2 at the individual-host level or over short transmission chains are still largely unknown. This study aimed to analyze the within-host genetic variability of PCV-2 subpopulations to unravel the forces driving PCV-2 evolution. A longitudinal weekly sampling was conducted on individual animals located in three farms after the first PCV-2 detection. The analysis of polymorphisms evaluated throughout the full PCV-2 genome demonstrated the presence of several single nucleotide polymorphisms (SNPs) especially in the genome region encoding for the capsid gene. The global haplotype reconstruction allowed inferring the virus transmission network over time, suggesting a relevant within-farm circulation. Evidences of co-infection and recombination involving multiple PCV-2 genotypes were found after mixing with pigs originating from other sources. The present study demonstrates the remarkable within-host genetic variability of PCV-2 quasispecies, suggesting the role of the natural selection induced by the host immune response in driving PCV-2 evolution. Moreover, the effect of pig management in multiple genotype coinfections occurrence and recombination likelihood was demonstrated.
Role of partial molar enthalpy of oxides on Soret effect in high-temperature CaO–SiO2 melts
Authors: Shimizu Masahiro , Matsuoka Jun , Kato Hiroshi , Kato Takeyuki , Nishi Masayuki , Visbal Heidy , Nagashima Kohji , Sakakura Masaaki , Shimotsuma Yasuhiko , Itasaka Hiroki , Hirao Kazuyuki , Miura Kiyotaka
Published: October 2018

The Soret effect or thermodiffusion is the temperature-gradient driven diffusion in a multicomponent system. Two important conclusions have been obtained for the Soret effect in multicomponent silicate melts: first, the SiO2 component concentrates in the hot region; and second, heavier isotopes concentrate in the cold region more than lighter isotopes. For the second point, the isotope fractionation can be explained by the classical mechanical collisions between pairs of particles. However, as for the first point, no physical model has been reported to answer why the SiO2 component concentrates in the hot region. We try to address this issue by simulating the composition dependence of the Soret effect in CaO–SiO2 melts with nonequilibrium molecular dynamics and determining through a comparison of the results with those calculated from the Kempers model that partial molar enthalpy is one of the dominant factors in this phenomenon.
Up-regulated miR-133a orchestrates epithelial-mesenchymal transition of airway epithelial cells
Authors: Chen Linjie , He Xiaobai , Xie Yan , Huang Yapei , Wolff Dennis W. , Abel Peter W. , Tu Yaping
Published: October 2018

Dysregulation of microRNAs (miRNAs) contributes to epithelial-mesenchymal transition (EMT) of cancer, but the pathological roles of miRNAs in airway EMT of lung diseases remains largely unknown. We performed sequencing and real-time PCR analysis of the miRNA expression profile of human airway epithelial cells undergoing EMT, and revealed miR-133a to be one of the most common up-regulated miRNAs. MiR-133a was previously reported to be persistently up-regulated in airway epithelial cells of smokers. We found that mice exposed to cigarette smoke (CS) showed airway hyper-responsiveness, a typical symptom occurring in CS-related lung diseases, up-regulation of miR-133a and EMT marker protein N-cadherin in airway epithelium. Importantly, miR-133a overexpression induces airway epithelial cells to undergo spontaneous EMT via down-regulation of grainyhead-like 2 (GRHL2), an epithelial specific transcriptional factor. Loss of GRHL2 causes down-regulation of epithelial splicing regulatory protein 1 (ESRP1), a central coordinator of alternative splicing processes that are critical in the regulation of EMT. Down-regulation of ESRP1 induces isoform switching of adherens junction-associated protein p120-catenin, and leads to the loss of E-cadherin. Our study is the first to demonstrate that up-regulated miR-133a orchestrates airway EMT via alternative splicing processes, which points to novel therapeutic possibilities for the treatment of CS-related lung disease.
A novel aptasensor based on gold nanorods/ZnS QDs-modified electrode for evaluation of streptomycin antibiotic
Authors: Roushani Mahmoud , Ghanbari Kazhal
Published: October 2018

In this study, a simple and effective strategy was developed for specific detection of streptomycin (STR) antibiotic.
Covalently immobilized catalase on functionalized graphene: effect on the activity, immobilization efficiency, and tetramer stability
Authors: Barreca Davide , Neri Giulia , Scala Angela , Fazio Enza , Gentile Davide , Rescifina Antonio , Piperno Anna
Published: October 2018

The different anchorage modes of catalase covalently linked to graphene affect the secondary and quaternary structures determining the biological properties.
Microfluidics-enabled rapid manufacturing of hierarchical silica-magnetic microflower toward enhanced circulating tumor cell screening
Authors: Hao Nanjing , Nie Yuan , Tadimety Amogha , Shen Ting , Zhang John X. J.
Published: October 2018

Microfluidics-enabled rapid manufacturing of a hierarchical silica-magnetic microflower was developed for improving the screening efficiency of circulating tumor cells.
Influence of (Al1/3W2/3)5+ co-substitution for Nb5+ in NdNbO4 and the impact on the crystal structure and microwave dielectric properties
Authors: Yang Hongcheng , Zhang Shuren , Yang Hongyu , Yuan Ying , Li Enzhu
Published: October 2018

The relationship between structure, bond characterizations and microwave dielectric properties of NdNb1−x(Al1/3W2/3)xO4 (0.03 ≤ x ≤ 0.07) ceramics was characterized by complex chemical bond theory and IR spectrum.
Cages on a plane: a structural matrix for molecular ‘sheets’
Authors: Fraser Hector W. L. , Nichol Gary S. , Baldansuren Amgalanbaatar , McInnes Eric J. L. , Brechin Euan K.
Published: October 2018

A family of heterometallic Anderson-type ‘wheels’ of general formula [MIII2MII5(hmp)12]4+ has been extended to include MIII = Cr, Al; MII = Co, Ni, Fe, Mn, Cu and Zn, alongside the ‘extended’ [AlIII6CuII7(OH)12(hmp)12]8+.
A facile method to study the bioaccumulation kinetics of amorphous silica nanoparticles by quantum dot embedding
Authors: Zang Xiao-Mei , Li Jia-Ming , Wang Ying , Liu Yue-Yue , Wei Zhong-Bo , Yang Liuyan , Miao Ai-Jun
Published: October 2018

A facile method was developed to study the bioaccumulation kinetics of amorphous silica nanoparticles (AmSiNPs) by embedding the particles with quantum dots (QDs) and then using Cd as the tracer.
Chlorogenic acid methyl ester exerts strong anti-inflammatory effectsviainhibiting the COX-2/NLRP3/NF-κB pathway
Authors: Zhang Lang , Fan Ya , Su Hanwen , Wu Li , Huang Yuying , Zhao Lei , Han Bing , Shu Guangwen , Xiang Meixian , Yang Jin-Ming
Published: October 2018

In vivoandin vitrostudies show that chlorogenic acid methyl ester (CME) has been proven to be a potential nutraceutical for preventing inflammation.
A general gelation strategy for 1D nanowires: dynamically stable functional gels for 3D printing flexible electronics
Authors: Liu Shuiren , Shi Xinlei , Li Xiran , Sun Yang , Zhu Jian , Pei Qibing , Liang Jiajie , Chen Yongsheng
Published: October 2018

A versatile gelation strategy was developed to obtain thixotropic nanowire gels for 3D printing of flexible electronics.
Stabilization of noble metal nanostructures for catalysis and sensing
Authors: Feng Ji , Gao Chuanbo , Yin Yadong
Published: October 2018

This feature article reviews our recent advances in the stabilization of noble metal nanocrystals for catalysis and sensing applications.
High rate and stable symmetric potassium ion batteries fabricated with flexible electrodes and solid-state electrolytes
Authors: Lu Ke , Zhang Hong , Gao Siyuan , Cheng Yingwen , Ma Houyi
Published: October 2018

Prussian blue particles were deposited on polypyrrole coated wiper clothes and used as bipolar electrodes for fabrication of high performance flexible solid state K-ion aqueous batteries.
Origins of the enantioselectivity of a palladium catalyst with BINOL–phosphoric acid ligands
Authors: Zhang Jun
Published: October 2018

The enantioselectivity of the studied C–H activation is related to the Brønsted acidity and isopropyl groups of the effective catalysts.
Alleviate theJ–Vhysteresis of carbon-based perovskite solar cellsviaintroducing additional methylammonium chloride into MAPbI3precursor
Authors: Jiang Huirong , Liu Xingyu , Chai Nianyao , Huang Fuzhi , Peng Yong , Zhong Jie , Zhang Qi , Ku Zhiliang , Cheng Yi-bing
Published: October 2018

The hysteretic phenomenon commonly exists in theJ–Vcurves of perovskite solar cells with different structures, especially for carbon-based mesoscopic perovskite solar cells without hole-conductor (carbon-based PSCs).
A sudden-melting event during water freezing inside a copper well
Authors: Xu WenQiang
Published: October 2018

We observed a novel melting scenario by confocal microscopy, which we call a ‘sudden-melting event’, during the freezing of super-cooled water inside a millimeter-sized copper well.
Core–shell structured NaYF4:Yb,Tm@CdS composite for enhanced photocatalytic properties
Authors: Feng Pengpeng , Pan Yusong , Ye Hui
Published: October 2018

NaYF4:Yb,Tm upconversion nanocrystals with hexagonal structure possess excellent photoluminescence emission characteristics.
The glycine-rich flexible region in SSB is crucial for PriA stimulation
Authors: Huang Yen-Hua , Huang Cheng-Yang
Published: October 2018

Single-stranded DNA-binding protein (SSB) is essential for all DNA-dependent cellular processes.
Rational design W-doped Co-ZIF-9 based Co3S4 composite photocatalyst for efficient visible-light-driven photocatalytic H2 evolution
Authors: Wang Haiyu , jin Zhiliang
Published: October 2018

Herein, a novel W doped Co3S4 composite photocatalyst was successfully prepared by MOF (metal organic framework), Co-ZIF-9, as a nanoscaled template via a hydrothermal treatment.
Reply to the ‘Comment on “A symmetrical method to obtain shear moduli from microrheology”’ by M. Tassieri, Soft Matter, 2018, 14, DOI: 10.1039/C8SM00806J
Authors: Nishi Kengo , Kilfoil Maria L. , Schmidt Christoph F. , MacKintosh F. C.
Published: October 2018

We provide a response to the comments by M. Tassieri on our recent article in Soft Matter.
3D printing of nanocellulose hydrogel scaffolds with tunable mechanical strength towards wound healing application
Authors: Xu Chunlin , Zhang Molino Binbin , Wang Xiaoju , Cheng Fang , Xu Wenyang , Molino Paul , Bacher Markus , Su Dandan , Rosenau Thomas , Willför Stefan , Wallace Gordon
Published: October 2018

Hydrogel scaffolds with tunable mechanical strength were prepared by 3D-printing of 1 wt% one-component-only wood derived nanocellulose, and may support fibroblast cells’ proliferation.
Methacrylamide-modified collagen hydrogel with improved anti-actin-mediated matrix contraction behavior
Authors: Yang Ke , Sun Jing , Guo Zhenzhen , Yang Jirong , Wei Dan , Tan Yanfei , Guo Likun , Luo Hongrong , Fan Hongsong , Zhang Xingdong
Published: October 2018

A collagen-based chondro-inductive hydrogel with improved mechanical properties was developed to promote chondrogenesis of BMSCs by resisting actin-mediated matrix contraction.
N-Cyanoimine as an electron-withdrawing functional group for organic semiconductors: example of dihydroindacenodithiophene positional isomers
Authors: Peltier Jean-David , Heinrich Benoît , Donnio Bertrand , Jeannin Olivier , Rault-Berthelot Joëlle , Jacques Emmanuel , Poriel Cyril
Published: October 2018

This work focuses on a detailed structure–property relationship study, including the incorporation in n-type OFETs, of two dihydroindacenodithiophene regioisomers bearing two cyanoimine groups either in a syn- or an anti-configuration.
Smartly designed AIE triazoliums as unique targeting fluorescence tags for sulfonic biomacromolecule recognition via ‘electrostatic locking’
Authors: Kang Qing , Xiao Yin , Hu Wenping , Wang Yong
Published: October 2018

Smartly designed AIE triazoliums as unique targeting fluorescence tags for specific sulfonic biomacromolecule recognition via ‘electrostatic locking’.
Azimuthal variations of gas-phase oxygen abundance in NGC 2997
Authors: Ho I-Ting , Meidt Sharon E. , Kudritzki Rolf-Peter , Groves Brent A. , Seibert Mark , Madore Barry F. , Schinnerer Eva , Rich Jeffrey A. , Kobayashi Chiaki , Kewley Lisa J.
Published: October 2018

The azimuthal variation of the H II region oxygen abundance in spiral galaxies is a key observable for understanding how quickly oxygen produced by massive stars can be dispersed within the surrounding interstellar medium. Observational constraints on the prevalence and magnitude of such azimuthal variations remain rare in the literature. Here, we report the discovery of pronounced azimuthal variations of H II region oxygen abundance in NGC 2997, a spiral galaxy at approximately 11.3 Mpc. Using 3D spectroscopic data from the TYPHOON Program, we have studied the H II region oxygen abundance at a physical resolution of 125 pc. Individual H II regions or complexes are identified in the 3D optical data and their strong emission line fluxes measured to constrain their oxygen abundances. We find 0.06 dex azimuthal variations in the oxygen abundance on top of a radial abundance gradient that is comparable to those seen in other star-forming disks. At a given radial distance, the oxygen abundances are highest in the spiral arms and lower in the inter-arm regions, similar to what has been reported in NGC 1365 using similar observations. We discuss whether the azimuthal variations could be recovered when the galaxy is observed at worse physical resolutions and lower signal-to-noise ratios.
Structural and heat-insulating foam concrete of non-autoclaved hardening based on microsilica
Authors: Baranova Albina , Shustov Pavel , Yazina Olga
Published: October 2018

The article presents testing results of non-autoclave structural and heat-insulating foam concrete, made on the basis of astringents of different grades and with different fillers. It has been experimentally established that the best filler for foam concrete is microsilica due to its high specific surface area and low bulk density in comparison with the sand. The use of high-quality binders in foam concrete mixtures allows to increase not only the strength of foam concrete, but also the content of microsilica up to 70% with respect to mixtures at lower brands of Portland cement.
Regularization of the problems of planning and processing the test results of pipeline systems for hydraulic losses
Authors: Grebneva Oksana
Published: October 2018

The lack of reliable information on actual characteristics and parameters is the main deterrent to the effective application of mathematical and computer modelling methods for solving problems of optimal reconstruction, adjustment, and development of operational problems. The lack of such information is solved on the basis of applying the identification problems that require expert (approximate) specification of a priori parameter values. This leads to the sensitivity of the solution of identifying a problem to the errors in setting the initial information. One way to solve this problem is to apply regularization methods. In this paper, a numerical example proposes a rule for expert assignment of a priori information on the parameters of elements, which makes it possible to minimize its influence on the results of planning active experiments. In addition, the paper shows the independence of the solution of the identification problem from the composition of the vector of independent parameters.
Optimization of the foam generation regime in a cylindrical channel
Authors: Moskvitin Vladimir , Moskvitin Dmitry , Emelyanova Natalia
Published: October 2018

Mass and multi-purpose use of air-mechanical foams from gas-liquid mixtures predetermines the need to establish the physical and technical patterns of their formation in high-efficiency generating plants. The paper presents the results of optimizing the foaming regimes, taking into account the joint influence of all probable factors coming from the technology of the process of obtaining stable disperse structures. A regression model has been developed that makes it possible to determine optimal parameters of the foaming regime with the required structure and thermal properties.
Technical innovations as a means of increasing the efficiency of technological equipment in modern production conditions
Authors: Skibo Denis , Sudnikovich Vera , Tolstoy Mikhail
Published: October 2018

This article presents a study of the possibilities of technological equipment in municipal engineering, as well as technical innovations to improve its efficiency. The authors review the research on a hydraulic mode and resistances in a working body of a technological equipment. The research results are determined by the introduction of new technical solutions aimed at increasing the efficiency in the work of the Vodokanal enterprises. Improvement of technological equipment is as a result of the improved working conditions in the process of the water disposal system operation.
Applying models of spatial interpolation for the approximation of responses in the refinement of parameters of finite element models
Authors: Pikhalov Anatoly , Zabelin Anton
Published: October 2018

The numerical experiment on refining the parameters of the finite element model of the beam by the method of approximating the responses is presented in the article. As mathematical models of joint-stock companies are used: linear combinations of radial-basis functions, and Kriging-models. These models are generated in the work on the basis of Latin squares and depend on the parameters to be refined (the moduli of elasticity of finite element groups of the beam). To obtain optimal values of the parameters, a genetic optimization method was used. The results of solving the optimization problem showed a high level of coincidence of the parameter values with a combination of response models obtained from dynamic and static types of calculations. It was also shown that when solving the problems of finite element models, it is sufficient to use models constructed only on the basis of radial-basis functions.
Consideration of cumulative effects in concrete structures at low temperatures impact
Authors: Pinus Boris
Published: October 2018

The design of reinforced concrete elements for a determined service life in severe climatic conditions should provide an additional resilience resource in accordance with their serviceability limit state. For its statistical justification, it is proposed to use dynamic models of the change in freezing and thawing cycles (FTC) of reliability index β, and, as its minimum (at most) permissible value, the value corresponding to the required level of reliability. Statistically representative experimental data of kinetics are presented for FTC of index β, determined from the change in various controlled parameters of strength and deformability of concrete.
Heat exchangers of increased thermal efficiency for power and technological machines: development and research
Authors: Chernov Nikolai
Published: October 2018

The paper reviews the development and application of new technologies and designs of heat exchangers, as well as the ways to increase the efficiency of heat exchange, with the aim to improve the thermal engineering parameters and performance characteristics of power and process machines and to reduce toxic emissions during their manufacture. Theoretical and practical foundations for increasing the heat exchange efficiency of heat exchangers are also reviewed. The increase in heat exchange efficiency of heat exchangers is achieved by increasing the area of heat exchange surfaces in contact with heat carriers by forming a macrorelief having optimal geometric parameters by finning. A high-efficiency method of machining, deforming cutting (DC), which is based on cutting and bending of the layers of the surface layer of the workpiece metal, providing a wide range of the resulting macrorelief, is chosen for finning the heat exchange surfaces. The paper provides optimal geometric parameters of finning: the fin height (H), the fin pitch (S) and the thickness of the rib (a). The efficiency of the selected geometric parameters is researched and experimentally tested. It has been experimentally established that the finest finning parameters are the minimum fin pitch and the maximum possible fin height. The interrelation is established, and the geometrical parameters of the heat exchange surface processed by the DC method are determined with the operational characteristics of heat exchangers. The greatest thermal efficiency was achieved with a fin pitch of S=1.5 mm, a fin height of h=3 mm, and a thickness of a=0.75 mm. We consider the TA (water oil) design developed by the author to enhance the efficiency of heat exchange. The research results on increasing the efficiency of heat transfer are presented in the paper. The application of the finned coiled tubing heat exchanger developed on the basis of the research results makes it possible to significantly improve the efficiency, reliability, and service life of power and process machines.
Analysis and synthesis of regime controllability of heat supply systems
Authors: Shalaginova Zoya
Published: October 2018

A mathematical model of the heat and hydraulic regimes (HHR) of the heat supply system (HPS) is given in time, taking into account the transport delay, disturbing, and control actions. Based on the simulation of the HHR, the indicators of consumer security integrated over the billing period were developed. The analysis of heat deficit indicators allows us to adopt a decision on the placement of additional control units to improve the regime controllability. The approach to the task of placing intermediate stages of regulation based on the construction of path matrices from final consumers in the direction of the reverse flow of the coolant is given. The model is implemented in the information-computational complex (ICC) “ANGARA-TS” for the calculation of the HHR of HPS, which is developed in the Melentiev Energy Systems of SB RAS.
Application of energy-efficient methods in heating systems of industrial and public buildings
Authors: Shelekhov Igor , Dorofeeva Natalia , Shelekhov Maximilian
Published: October 2018

In this article, a comparative analysis of the application of the heat-storage method of heating separately and combined with the use of a traditional heating system and infrared heating devices is carried out. In the presented paper, the analysis of the results obtained by comparing the operation of a traditional heating system and a heating system based on the application of modern techniques and new patented devices is given on the example of concrete premises. The research has shown that due to the use of modern techniques, the microclimate parameters described by the recorded temperature values have been improved by 30-45%, and the energy costs have been reduced by more than three times.
Optimization of the reliability of heat supply with an active consumer
Authors: Postnikov Ivan , Penkovsky Andrey
Published: October 2018

The paper formulates the problem of ensuring the reliability of the heat supply system due to the optimal distribution of reliability parameters in the system, including taking into account capabilities of an active consumer to replace part of the load with own sources of thermal energy. Methods and models for solving this problem are proposed, which are based on the theory of random processes, the theory of hydraulic circuits, and the basic laws of heating. Results of the computational experiment based on the developed methodical apparatus are presented. The possible economic effect of using an active consumer for solving the describe problem is also reviewed in the paper.
Optimization of the district heating zones
Authors: Stennikov Valery , Mednikova Ekaterina , Postnikov Ivan
Published: October 2018

A method for determining the optimal action zones of the centralized sources of thermal energy is developed using the calculation of the effective heat supply radius of consumers. The methodology allows to take into account the features of heat supply systems’ functioning, their technical and economic indicators, the uneven distribution of heat loads throughout the city, and limitations on the reliability of the system. Practical implementation of the proposed methodology on the scheme of operating a heat supply system is presented, the results of calculating the effective heat supply radius with their subsequent correction for reliability requirements are obtained. The application of this technique in the development of heat supply schemes for cities will allow to determine the boundaries of effective heat supply radii in all directions of the mains of heat networks, taking into account the optimal flow distribution of the coolant in them and the sections’ technical characteristics.
The method of adjustment of heat supply systems with the multistage temperature control at pumping stations
Authors: Tokarev Vyacheslav , Novitsky Nikolay
Published: October 2018

The lowering of the temperature graph in the lower-level heat networks is often carried out by a mixture of coolant from the return pipeline at mixing pumping stations in order to maintain the set temperature of the mixed water. In this case, part of the heat carrier is not returned to the source of thermal energy, but it circulates in the circuits from the mixing station to the lower consumption nodes. The presence of such circulation flows leads to the absence of a stabilizing moment of the temperature field when it is calculated by traditional methods, as well as to the “looping” of the computational process and the impossibility of obtaining a solution. In work to overcome these problems, a new computational scheme for commissioning calculation is proposed, which is based on: (a) decomposing the calculation of the thermal-hydraulic regime into calculations of the hydraulic and temperature conditions; (b) using the conditional regulator of the ratio of the mixing station’s output costs in calculating the hydraulic regime; (c) fixing the temperature at the station’s output when calculating the temperature regime; (d) iterative calculation with correction of the setpoint of the ratio controller of the flow rate based on the calculation of the temperature regime.
The use of local energy resources for remote populated areas
Authors: Bochkarev Victor , Gubiy Elena , Dekanova Nina , Zorkaltsev Valery , Khan Veniamin
Published: October 2018

The economic and environmental benefits of using local energy resources for the heat supply of remote settlements are discussed. Particular attention is paid to the problem of energy supply of the Baikal tourist and recreational zone, in which environmental restrictions have a significant influence on decision-making. The results of the research of the energy plantations functioning for the fuel supply of remote settlements on the basis of application the economic-mathematical model for their analysis and optimization are presented in the paper. The problem of choosing the optimal combination of energy plantations, and imported and local fuel is discussed. The influence of the volume of the fuel demand, the prices of the long-range fuel, the transport factor on the economic efficiency depending on the configuration and the required area of the energy plantation is considered. The options to increase the efficiency of heat supply for small and medium-sized settlements in the Baikal region are analyzed.
Energy efficiency in civil engineering: analyzing world experience
Authors: Bezdenezhnukh Tatiana , Kuritsyn Andrey , Gimelshtein Irina
Published: October 2018

There are consistent trends in the development of energy-saving technologies in civil engineering in almost all countries of the world. The article considers the main approaches to ensuring energy efficiency in in civil engineering, analyzes the standards of energy-efficient construction in the world in general and in Russia in particular, and gives some recommendations on increasing energy efficiency in engineering.
Analysis of the impact of transport accessibility on the cost of housing on the example of the city of Irkutsk
Authors: Sharov Maksim
Published: October 2018

The paper is devoted to the issues of estimation of transport accessibility of a territory, and also the influence of transport accessibility on cost of a square meter of housing. In particular, the dependence of the possible cost of one square meter on the value of transport accessibility is established.
The impact of anthropogenic and external influences on the life cycle of a real estate object in Vietnam
Authors: Matveeva Maria , Larina Olga , Pham Hai Yen
Published: October 2018

The life cycle of real estate objects in Vietnam have been studied in the terms of negative anthropogenic and external impacts. It is shown in the paper that the reliability and longevity of the constructed objects are influenced in aggregate by all groups of the impact factors considered with the disclosure of the destructive processes leading to collapse of the buildings. It is explained that in order to ensure the safety of functioning of buildings erected in compliance with regulatory requirements at the stages of their construction and operation, it is necessary to conduct constant monitoring of their actual technical condition.
Wave response of enzymatic processes in biological systems of water treatment and treatment of precipitation
Authors: Aksenova Inna
Published: October 2018

Theoretical studies of the wave response of enzymatic processes in biological systems of wastewater treatment reactors and treatment of precipitation have been carried out. At present, the use of various methods of wave action on the biological systems of water treatment reactors and treatment of precipitation in various types of reactors has been increased to intensify the processes of biological purification and treatment of precipitation. On the basis of this, the hypothesis of wave responses of enzymatic processes arose. The main research issue is to identify the wave response of enzymatic processes in stationary conditions and in the excited state of the system. This observation will allow to determine the limits of wave action on aerobic and anaerobic conversion of organic substrate, hydrolysis of high molecular weight organic compounds, nitrification, denitrification, as well as biological phosphorus removal. The main task of this study is the modeling of multicomponent processes, based on the results of identification and selectivity of the wave response in biological systems of wastewater treatment reactors and treatment of precipitation.
On the problem of development of built-up areas and improving quality of the urban environment (on the example of Ulan-Ude)
Authors: Zharkaia Galina , Osodoeva Olga , Sanzhina Olga , Gunazhinova Yuliana
Published: October 2018

The built-up areas in the cities have a trend towards developing slums due to excessive urbanization that leads to dividing city areas to useful and ineffective. The problem of large cities originates in ineffective property management, excessive losses from the maintenance and operation of buildings and structures. Considering this issue from the perspective of the effective use of territories, it is impossible not to refer to such a mechanism as development. It considers management and development through the integrated development and spatial planning with maximum benefit. Zoning of territories on profitable, low-income and unprofitable segments will allow elaborating projects focused on generating additional benefit by attracting private entrepreneurs and avoid losses in exploitation. In addition to that, it will allow analyzing prospective projects taking into account the existing urban development and formation of a comfortable urban environment for the population.
Development of a model of including historical and cultural landscapes in the tourist infrastructure
Authors: Shestopalova Natalia , Riabchenkova Antonina , Vershinina Svetlana
Published: October 2018

The article is devoted to the issues of urban development of the coastal territories in the functional, architectural and planning, social and environmental aspects of design using the example of the island of Olkhon. Natural recreational resources are the basis for the development of tourism in the Baikal region, which include unique landscapes, and objects that have the status of natural monuments. The primary development of tourism in the basin of Lake Baikal is envisaged in all government planning and program documents. Historical and cultural heritage of the region, religion and ethno-cultural features of indigenous peoples who have preserved the age-old traditions of nature management represent a special category of resources. Historical and cultural heritage includes socially recognized material and spiritual values preserved by the society for the maintenance of social and ethnic identity and for transmiting them to the next generations. This information potential of the territory, imprinted in phenomena, events, material objects, moral and ethical norms, scientific and philosophical ideas is necessary for the mankind for its future development.
Industrial technologies of reconstruction of large-panel buildings of the 1-335 series
Authors: Petrov Alexander , Peshkov Vitaly , Petunin Alexander
Published: October 2018

Technological and constructive decisions of modernization and reconstruction of large-panel buildings of the first mass buildings are considered in the article. The technology of the reinforced concrete diaphragms of the building hardness brings the seismic stability of the building to the normative level. The technologies of erecting a building with bay windows, as well as the construction of attic floors by the method of mounting bulk units enlarged onto the span have been developed. The folding volumetric blocks and the technology of their installation are proposed. The analysis of reconstructive works in two variants showed their rationality and financial attractiveness in comparison with the dismantling of buildings.
An analysis of the Chinese techniques and methods in the objects of landscape heritage in the city of Saratov, Russia
Authors: Barinov Yu. , Sokolskaya O.
Published: October 2018

In many regions of Russian Federatio, the objects of landscape heritage are in poor condition. They were created between the second half of the 18th century and the beginning of the 20th century. It was the period when landscape park constructions became widespread in Europe and Russia after establishing active trade and industry relations with East Asian countries, such as China. The research includes analysis of Chinese techniques and methods, which emerged in Russian objects of landscaping art, particularly in estate gardens and parks of the Volga region. The main criteria and flora used in “green” architecture in the territories of the landscape heritage objects of Saratov Volga region are discovered. The assessment of the range of greenery introduced from China and of the elements of the park architecture is given.
Organizational structure of unified information system for network engineering and technical support in urban areas
Authors: Samsonova Natalia , Shevtchenko Olga
Published: October 2018

Municipal government needs a full objective information about the state of technical support and engineering systems network. Thus, geographic information systems are currently in demand in the communal sector. If we consider the territory of any municipal entity in Russian Federation, the control of all processes without the automated system is very difficult. Geographic information systems operate spatial objects, as well as the full set of reference information about these objects. The right decision is possible only if there is all the necessary information in spatial and attributive form.
Armenia’s transport security within the framework of ITC TRACECA and “North-South”
Authors: Davtyan Vahe
Published: October 2018

The issues of transport policy of Armenia in the context of integration into the international corridors (ITC) TRACECA and the "North-South" are considered. The key geopolitical factors impeding the integration process are identified. The basic threats to Armenia’s transport safety as an important component of national security are determined. The potential role of Armenia in the implementation of the TRACECA transport corridor at the opening of the Armenian-Turkish border is identified. The possibility of Armenia’s integration into the international transport corridor "North-South" through the implementation of the project of construction of Iran-Armenia is revealed.
The information and computing complex “ANGARA-VS” for end-to-end modeling of water supply systems when developing development schemes, scheduling modes, and dispatching management
Authors: Alexeev Alexander , Novitsky Nikolay
Published: October 2018

The paper presents a brief description of the problems of making technological decisions to manage the development and functioning of water supply networks in conditions of territorial, structural, and temporal disconnection of the decision-making processes at WKX enterprises. An approach to overcome such problems is proposed, based on the application of end-to-end modeling technologies and a single information space of the enterprise based on the application of the ANGARA-VS information and computing complex. Its brief characteristics and functions are given. The experience of automation of development of operational modes and dispatching management and development of perspective schemes of water supply in Municipal Unitary Enterprise "Vodokanal", Irkutsk.
Computer simulation of the dynamics of systems of solids
Authors: Garifulin Yuri
Published: October 2018

The paper considers an algorithm for modeling the exact differential equations of the motion of systems of solids based on the Appell equations. To implement it, a multiple calculation of the energy of the system’s accelerations is required for different values of generalized velocities and accelerations.
Discrete-continual mathematical models in solving vibration protection problems of building structures
Authors: Sobolev Vladimir
Published: October 2018

The paper outlines the method of forming mathematical models for the dynamic interaction of the vibroactive technological equipment with load-bearing structures of industrial structures on the basis of discrete-continual approximations previously developed by the author. Ways of implementing methods in the formation of vibration protection systems of structures are provided in the paper. The features of systems’ functioning and their sensitivity to fluctuating vibration frequency processes are also described.
Transformation of the real estate market on the basis of use of the blockchain technologies: opportunities and problems
Authors: Kalyuzhnova Nadezhda
Published: October 2018

The real estate market is influenced by the global growth trends, such as the growth of the transaction costs and new technologies of the fourth industrial revolution. The types of the transaction costs of the real estate market are analyzed in the paper. The characteristics of the blockchain as a new information technology that allows reducing transaction costs are considered. The essence of the blockchain as a value-communication technology that allows transferring not only information, but also value using mobile networks and the Internet, is substantiated. The types and classification of the blockchains are considered. The directions of real estate transformation on the basis of introduction of the blockchain technologies are shown. Some unresolved issues, as well as the dangers and challenges of the development of the blockchain technologies, are indicated in this article.
Legal aspects of legislative regulation of information security and protection of information in data centers
Authors: Golovina Elena , Turkova Valentina , Vasichenko Artem
Published: October 2018

In modern conditions, information is one of the most important business resources that need protection. Therefore, today, the issue of developing the information security management system and its implementation in organizations is conceptual. The paper reveals the problems of the information security in two main aspects at the level of legislative regulation and the information security in data centers. A number of features characterizing information as an object of legal relations have been determined. The international standards regulating the issues of information security, in particular the safety of data centers, are singled out. The paper touches upon the main requirements that modern data centers should meet. The authors identified the main types of risks when using an external data center, and suggested ways to minimize them.