bluuebunny/crossref_metadata_2025 huggingface dataset:
Visualization method for stress-field evolution during rapid crack propagation using 3D printing and photoelastic testing techniques
Authors: Ju Yang , Xie Heping , Zhao Xi , Mao Lingtao , Ren Zhangyu , Zheng Jiangtao , Chiang Fu-Pen , Wang Yongliang , Gao Feng
Published: March 2018

Quantitative visualization and characterization of stress-field evolution during fracture rapid growth is critical for understanding the mechanisms that govern the deformation and failure of solids in various engineering applications. However, the direct capture and accurate characterization of a rapidly-changing stress field during crack propagation remains a challenge. We report an experimental method to quantitatively visualize and characterize rapid evolution of the stress-field during crack propagation in a transparent disc model containing a penetrating fusiform crack. Three-dimensional (3D) printing technology and a stress-sensitive photopolymer resin were adopted to produce the disc model and to alleviate the residual processing stress that usually blurs the dynamic stress field due to overlap. A photoelastic testing system that synchronized a high-speed digital camera and a pulsed laser with a nanosecond full width at half maximum (FWHM) was used to capture the rapid evolution of the stress field in the vicinity of crack tips. The results show that the proposed method is suitable to directly visualize and quantitatively characterize the stress-field evolution during crack rapid propagation. It is proved that the crack propagation velocity is strongly governed by the stress field around the crack tips.
Site-specific electronic structure of imidazole and imidazolium in aqueous solutions
Authors: Meyer F. , Blum M. , Benkert A. , Hauschild D. , Jeyachandran Y. L. , Wilks R. G. , Yang W. , Bär M. , Reinert F. , Heske C. , Zharnikov M. , Weinhardt L.
Published: March 2018

The electronic structures of aqueous imidazole and imidazolium solutions are studied in an atom- and site-specific fashion using soft X-ray spectroscopy.
Designing a porous-crystalline structure of β-Ga2O3: a potential approach to tune its opto-electronic properties
Authors: Banerjee Swastika , Jiang Xiangwei , Wang Lin-Wang
Published: March 2018

We investigate how the optical and electronic properties of β-Ga2O3 can be changed in a particular porous structure with stoichiometrically balanced and extended vacancy channels.
A novel polyhedron-based metal–organic framework with high performance for gas uptake and light hydrocarbon separation
Authors: Sun Qiushi , Yao Shuo , Liu Bing , Liu Xinyao , Li Guanghua , Liu Xiaoyang , Liu Yunling
Published: March 2018

A novel Zn-PMOF with high density of OMSs and LBSs was successfully assembled by the SBBs strategy and exhibited high performance for the capture and separation of CO2 and C3H8 over CH4.
Temperature-dependent phase behaviour of tetrahydrofuran–water alters solubilization of xylan to improve co-production of furfurals from lignocellulosic biomass
Authors: Smith Micholas Dean , Cai Charles M. , Cheng Xiaolin , Petridis Loukas , Smith Jeremy C.
Published: March 2018

Selective solvation of xylan by water in the THF–Water miscibility gap allows tunable solubilization.
Synthesis of polyaniline–magnetite nanocomposites using swollen liquid crystal templates for magnetically separable dye adsorbent applications
Authors: Dutt S. , Vats T. , Siril P. F.
Published: March 2018

One dimensional iron oxide–polyaniline core–shell nanostructures enable faster adsorption of dyes and separation of the adsorbent using an external magnet.
Ligand free green plasma-in-liquid synthesis of Au/Ag alloy nanoparticles
Authors: Čempel David , Nguyen Mai Thanh , Ishida Yohei , Tokunaga Tomoharu , Yonezawa Tetsu
Published: March 2018

Au/Ag alloy nanoparticles were successfully prepared by a microwave-induced plasma in liquid process without any organic protecting or reducing agents.
The flow characteristics of solid particles used as additives for lubricants in the point contact area
Authors: Sui Tianyi , Song Baoyu , Zhang Feng , Chen Yuanyuan , Yan Shuai , Wang Anying , Ding Mei
Published: March 2018

The flow characteristics of solid particles used as lubricant additives under point contact conditions were investigated.
Coherency image analysis to quantify collagen architecture: implications in scar assessment
Authors: Clemons T. D. , Bradshaw M. , Toshniwal P. , Chaudhari N. , Stevenson A. W. , Lynch J. , Fear M. W. , Wood F. M. , Iyer K. Swaminathan
Published: March 2018

A novel technique for the fast and robust quantification of collagen architecture following scarring.
Arylnaphthalene lactone analogues: synthesis and development as excellent biological candidates for future drug discovery
Authors: Zhao Chuang , Rakesh K. P. , Mumtaz Saira , Moku Balakrishna , Asiri Abdullah M. , Marwani Hadi M. , Manukumar H. M. , Qin Hua-Li
Published: March 2018

A review of recent developments in the synthesis and biological applications of arylnaphthalene lactones analogs.
Designed synthesis of anatase–TiO2 (B) biphase nanowire/ZnO nanoparticle heterojunction for enhanced photocatalysis
Authors: Sun Chaoyang , Xu Qiuhua , Xie Yu , Ling Yun , Hou Yang
Published: March 2018

A novel ZnO NP/mesoporous anatase–TiO2 (B) NW heterojunction photocatalyst was synthesized for environmental purification and hydrogen evolution.
Coupled X-ray diffraction and electrochemical studies of the mixed Ti/V-containing NASICON: Na2TiV(PO4)3
Authors: Lalère F. , Seznec V. , Courty M. , Chotard J. N. , Masquelier C.
Published: March 2018

Na2TiV(PO4)3was synthesized by soft chemical oxidation. The system shows three electron exchange for 2 transition metals. Coupled X-ray diffraction/electrochemical studies were performed,operando.
Simultaneously improving the fire safety and mechanical properties of epoxy resin with Fe-CNTs via large-scale preparation
Authors: Zhang Junhao , Kong Qinghong , Wang De-Yi
Published: March 2018

To further improve the catalytic carbonization efficiency of polymer composites for the formation of compact protective layers in the combustion process, a novel type of Fe-CNTs was prepared in large scale.
Eu/Tb luminescence for alkaline phosphatase and β-galactosidase assay in hydrogels and on paper devices
Authors: Gorai Tumpa , Maitra Uday
Published: March 2018

Eu/Tb-based luminescent hydrogels and gel-coated discs were used for easy detection of alkaline phosphatase and β-galactosidase.
Enhanced osteogenic differentiation and bone regeneration of poly(lactic-co-glycolic acid) by grapheneviaactivation of PI3K/Akt/GSK-3β/β-catenin signal circuit
Authors: Wu Xiaowei , Zheng Shang , Ye Yuanzhou , Wu Yuchen , Lin Kaili , Su Jiansheng
Published: March 2018

The reconstruction of bone defects by guiding autologous bone tissue regeneration with graphene-based biomaterials is a potential strategy in the area of bone tissue engineering.
Mussel-inspired fabrication of porous anodic alumina nanochannels and a graphene oxide interfacial ionic rectification device
Authors: Li Chengyong , Zhao Yu , He Lei , Mo Rijian , Gao Hongli , Zhou Chunxia , Hong Pengzhi , Sun Shengli , Zhang Guigen
Published: March 2018

A mussel-inspired new interfacial ionic rectification device is fabricated using porous anodic alumina nanochannels and graphene oxide via dopamine polymerization.
The asymmetric syntheses of cryptocaryols A and B
Authors: Aljahdali Alhanouf Zakaria , Foster Kathryn Ann , O'Doherty George Augustine
Published: March 2018

The recent total syntheses of cryptocaryols A and B are reviewed.
A chiral aluminum solvating agent (CASA) for 1H NMR chiral analysis of alcohols at low temperature
Authors: Seo Min-Seob , Jang Sumin , Kim Hyunwoo
Published: March 2018

A chiral aluminum solvating agent (CASA) was demonstrated to be a general and efficient reagent for 1H NMR chiral analysis of alcohols.
Metal-free site selective cross-coupling of pyridines with secondary phosphine chalcogenides using acylacetylenes as oxidants
Authors: Trofimov Boris A. , Volkov Pavel A. , Khrapova Kseniya O. , Telezhkin Anton A. , Ivanova Nina I. , Albanov Alexander I. , Gusarova Nina K. , Chupakhin Oleg N.
Published: March 2018

Pyridines are easily cross-coupled with secondary phosphine chalcogenides in the presence of acylphenylacetylenes under mild conditions to afford 4-chalcogenophosphorylpyridines.
A novel iridium(iii) complex for sensitive HSA phosphorescence staining in proteome research
Authors: Wang Yi , Huang Huaiyi , Chen Ge , Chen Haijie , Xu Tingting , Tang Qian , Zhu Hailiang , Zhang Qianling , Zhang Pingyu
Published: March 2018

A novel iridium(iii) complex (Ir1) for sensitive HSA staining is reported. It is simpler and less time-consuming than Coomassie blue.
Singlet-assisted diffusion-NMR (SAD-NMR): redefining the limits when measuring tortuosity in porous media
Authors: Tourell Monique C. , Pop Ionut-Alexandru , Brown Lynda J. , Brown Richard C. D. , Pileio Giuseppe
Published: March 2018

Long-lived singlet order is exploited in diffusion NMR experiments to successfully measure the tortuosity of randomly packed spheres with diameters ranging from 500 to 1000 μm.
Programed dynamical ordering in self-organization processes of a nanocube: a molecular dynamics study
Authors: Harada Ryuhei , Mashiko Takako , Tachikawa Masanori , Hiraoka Shuichi , Shigeta Yasuteru
Published: March 2018

Self-organization processes of a gear-shaped amphiphile molecule (1) to form a hexameric structure (nanocube,16) were inferred from sequential dissociation processes by using molecular dynamics (MD) simulations.
Impact of nuclearity and topology on the single molecule magnet behaviour of hexaazatrinaphtylene-based cobalt complexes
Authors: Lemes Maykon A. , Magnan François , Gabidullin Bulat , Brusso Jaclyn
Published: March 2018

A hexaazatrinaphtylene-based transition metal complex that exhibits single molecule magnet behaviour is reported herein. This study reveals the influence of both nuclearity and topology on the magnetic properties of hexaazatrinaphtylene-based complexes.
Versatile synthesis of chiral 6-oxoverdazyl radical ligands – new building blocks for multifunctional molecule-based magnets
Authors: Solea Atena B. , Wohlhauser Tobie , Abbasi Parisa , Mongbanziama Yvan , Crochet Aurelien , Fromm Katharina M. , Novitchi Ghenadie , Train Cyrille , Pilkington Melanie , Mamula Olimpia
Published: March 2018

A versatile synthetic methodology to access two series of chiral verdazyl N,N′-chelate ligands 1 and 2 is presented and their ability to coordinate 3d metal ions is demonstrated.
Sulfonylcalix[4]arene functionalized nanofiber membranes for effective removal and selective fluorescence recognition of terbium(iii) ions
Authors: Hua Weikang , Wang Min , Li Peiyun , Shen Ke , Wang Xuefen , Hsiao Benjamin S.
Published: March 2018

A novel sulfonylcalix[4]arene functionalized aminated polyacrylonitrile (APAN) nanofiber membrane was fabricated, exhibiting good Tb3+ adsorption capacity and photoluminescence performance.
Synthesis of indoles from aroyloxycarbamates with alkynes via decarboxylation/cyclization
Authors: Ma Nuannuan , Li Peihe , Wang Zheng , Dai Qipu , Hu Changwen
Published: March 2018

Palladium-catalyzed decarboxylation/cyclization of aroyloxycarbamates with alkynes to construct C–N bonds.
Magnetocaloric study, critical behavior and spontaneous magnetization estimation in La0.6Ca0.3Sr0.1MnO3 perovskite
Authors: Jeddi M. , Gharsallah H. , Bejar M. , Bekri M. , Dhahri E. , Hlil E. K.
Published: March 2018

A detailed investigation was conducted on the magnetocaloric properties of La0.6Ca0.3Sr0.1MnO3 and its potential application in cooling fields.
Tailor-made spider-eggcase-silk spheres for efficient lysosomal drug delivery
Authors: Chen Jianming , Hu Jinlian , Zuo Peijun , Su Xiaoqian , Liu Zhigao , Yang Mo
Published: March 2018

Recombinant spider-eggcase-silk spheres are facilely prepared as drug carriers with a tailor-made isoelectric point specifically for lysosomal delivery.
Long-term in vitro degradation behaviour of Fe and Fe/Mg2Si composites for biodegradable implant applications
Authors: Sikora-Jasinska M. , Chevallier P. , Turgeon S. , Paternoster C. , Mostaed E. , Vedani M. , Mantovani D.
Published: March 2018

This fundamental study provides a basis for the processes of protective film formation on degradable Fe-based biomaterials.
An efficient and green synthesis of ferrocenyl-quinoline conjugates via a TsOH-catalyzed three-component reaction in water
Authors: Mou Rui-Qi , Zhao Mei , Lv Xue-Xin , Zhang Sheng-Yan , Guo Dian-Shun
Published: March 2018

We have successfully developed a green method for facile and efficient synthesis of ferrocenyl-quinoline conjugates from available starting materials via a TsOH-mediated three-component reaction in water.
Switching “on” and “off” the adhesion in stimuli-responsive elastomers
Authors: Kaiser S. , Radl S. V. , Manhart J. , Ayalur-Karunakaran S. , Griesser T. , Moser A. , Ganser C. , Teichert C. , Kern W. , Schlögl S.
Published: March 2018

Stimuli-responsive elastomers with reversible and spatially controllable adhesion properties were prepared and characterized in detail.
Design, synthesis, and properties of nonlinear optical chromophores based on a verbenone bridge with a novel dendritic acceptor
Authors: Sun Hejing , Li Zhong’an , Wu Jieyun , Jiang Zhenhua , Luo Jingdong , Jen Alex K.-Y.
Published: March 2018

A polyenic chromophore containing a new dendritic tricyanofuran acceptor has been synthesized for achieving improved polar order in poled polymers.
Enhanced insulating and piezoelectric properties of 0.7BiFeO3–0.3BaTiO3lead-free ceramics by optimizing calcination temperature: analysis of Bi3+volatilization and phase structures
Authors: Cheng Shuai , Zhang Bo-Ping , Zhao Lei , Wang Kai-Kun
Published: March 2018

The significantly enhanced insulating and piezoelectric properties are obtained in 0.7BiFeO3–0.3BaTiO3ceramic by fine-tuning the calcination temperature.
Wideband stripline fed tapered slot antenna with integral coupler for wide scan angle active phased array
Authors: Nalumakkal Priya Suresh , Maheshwara Reddy K. , Vinoy K.J. , Shukla Saurabh
Published: March 2018

A stripline fed tapered slot antenna (STSA) with integral coupler operating as an active array element over 1.5 octave bandwidth is presented. The proposed STSA with integral coupler features wideband transition which allows a direct 50 Ω stripline feed and enables the coupler to be integrated along with the feed. The coupler helps in taking a sample of signal for online performance monitoring and active phased array calibration. The measured results of antenna element have exhibited good radiation pattern performance with low cross‐polarisation in principal plane and low beam squint. Using this, a 16‐element H‐plane linear phased array antenna designed for the frequency range of 6–18 GHz and azimuth scan coverage of 60° is also presented. The active reflection coefficient of the array is calculated from measured mutual coupling coefficients and the array pattern over different scan angles is demonstrated. The grating lobe free scan coverage of 60° is obtained. The antenna array finds application in airborne systems.
Integration of wireless flexible sensor and virtual internal impedance model for blood leakage detection during haemodialysis
Authors: Huang Ping‐Tzan , Wu Jian‐Xing , Li Chien‐Ming , Lin Chia‐Hung
Published: March 2018

Blood leakage and resultant loss during haemodialysis therapy are life‐threatening complications. As the venous needles (at arterial/venous sites) disconnect from blood lines, little reaction time is left to stop the blood loss. The authors integrate the wireless flexible sensor with a virtual internal impedance model to design a warning tool to early detect blood leakage and further lower the mortality rate it causes. This flexible sensor is fabricated via a screen‐printing technique by printing electronic circuits on a soft substrate in an array configuration. The virtual internal impedance model employed is advantageous for both detecting if any short‐circuit branch resistance develops and estimating the virtual internal impedances of the sensor. Once the metering nodal voltage changes, the estimated quantity resistances and near infinite resistances are employed to separate a short circuit from an open circuit. The algorithm developed can be implemented in an embedded system via a wireless fidelity wireless network through cloud computing. The experimental results show feasibility and potential of specifications for commercial design.
Nodal dynamic equation used for electromagnetic transient simulation of linear switching circuit
Authors: Ji Feng , Qiu Yufeng , Wei Xiaoguang , Wu Xueguang , He Zhiyuan
Published: March 2018

This study proposed the nodal dynamic equation to solve the electromagnetic transient of linear switching circuit. The nodal dynamic equation is derived from the principle of energy conservation. By using trapezoidal method and time step to discrete the dynamic equation, its time discrete format is equivalent to the EMTP equation. Comparing with the EMTP method, the proposed method can change its numerical integration method and time step flexibly in the simulation. It is more suitable to solve the switching circuit.
The envelope of the power spectra of over a thousand δ Scuti stars
Authors: Barceló Forteza S. , Roca Cortés T. , García R. A.
Published: March 2018

CoRoT and Kepler high-precision photometric data allowed the detection and characterization of the oscillation parameters in stars other than the Sun. Moreover, thanks to the scaling relations, it is possible to estimate masses and radii for thousands of solar-type oscillating stars. Recently, a Δν − ρ relation has been found for δ Scuti stars. Now, analysing several hundreds of this kind of stars observed with CoRoT and Kepler, we present an empiric relation between their frequency at maximum power of their oscillation spectra and their effective temperature. Such a relation can be explained with the help of the κ-mechanism and the observed dispersion of the residuals is compatible with they being caused by the gravity-darkening effect.
The Notion of “High” and commitment to excellence in contemporary Russian architecture. History and project: looking into future
Authors: Volchok Yuri
Published: March 2018

The article covers the issue of high-rise buildings (skyscrapers) construction in Russia as the dialogue of artistic image and intellectual idea. The study shows that the professional commitment to skyscrapers erection brings to the foreground the comprehension of magnitude of the notion of “contemporary” in terms of time. It is important from methodical point of view to return to the initial meaning of the notions that provide for adding authentic meaning to the words “suprematism”, “commitment”, “excellence”, “new”, “high”, and other determinants of creativity capable of going beyond “flying geese” development pattern in architectural shaping. It is well known that V.G. Shukhov’s patents of 1896 were widely used in contemporary morphology of shaping. The heritage of Russian Avant Garde of 1910-20ies serves as an inspiration from methodological point of view (it is more and more evident from foreign master’s creative experience). This is why it is important to return, first of all, to comprehension of the author’s version of the notion “suprematism” ascending to Malevich - meaning commitment to excellence and not the “emblem” of preferences in style. The article includes the arguments providing for the capture of the 2010ies and, especially, 2015-17ies as the years of critical changes in history. Russian masters of architecture started as equals the stage of cooperative creative work with foreign architects erecting skyscrapers.
The development of the architectural form of a tower derived from a traditional and philosophical symbol, realized by solutions of high-class technologies. The case of the Bitexco Financial Tower
Authors: Van Khai Tran
Published: March 2018

The Bitexco Financial Tower, majestically standing tall in the heart of Ho Chi Minh City, Vietnam, rejects the box-shaped, abstract forms of modernism, incorporating an innovative idea of contemporary architecture. Based on the inspiration from the Bitexco Group, a renowned architect designedthe tower that became an iconic landmark of the city in the form of a lotus bud, one of the most iconic symbols of Vietnamese culture since ancient times. High class structural system solution designed by top international professional teams enable the building to rise high with its graceful, statuesque design of the lotus flower shape. CNNGo recently ranked the Bitexco Financial Tower fifth in their listing of the world’s 20 most-iconic skyscrapers.
Collective space of high-rise housing complex
Authors: Bakaeva Tatyana
Published: March 2018

The article considers the problems of support of citizens a comfortable living environment in the conditions of the limited territory of the megalopolis, the typological principles of formation of space-planning structure high-rise residence complexes with public space. The collective space for residents of high-rise housing estates on the example of international experience of design and construction is in detail considered. The collective space and the area of the standard apartment are analysed on comfort classes: a social - complex Pinnacle @ Duxton, a business - Monde Condos and an elite - Hamilton Scotts. Interdependence the area of the standard flat and the total area of housing collective space, in addiction on the comfort level, is revealed. In the conditions of high-density urban development, the collective space allows to form the comfortable environment for accommodation. The recommendations for achievement of integrity and improvement of quality of the city environment are made. The convenient collective space makes a contribution to civil policy, it creates the socializing sense of interaction of residents, coagulates social effect.
High-rise construction in historical cities through the example of Saint Petersburg
Authors: Granstrem Maria , Zolotareva Milena , Slavina Tatyana
Published: March 2018

The article sets forth results of the landscape visual analysis of the interaction of high-rise construction facilities with the environment of historical urban spaces. A toxic connection of high-rise construction facilities with the established urban landscape was analyzed and recorded. One of the latest stages of the reconstruction of historical cities, which penetrated many European countries at the end of the 20th century, also started in the beginning of the 21st century in Russia, where the reconstruction of historical facilities and territories became one of the leading trends of architectural activity. Therefore, problems of the interaction between the old city and new high-rise construction nearby historical centers are extremely relevant for Russian architects. Specific features of Russian high-rise construction within visual borders of historical cities, developed at the turn of the 20th–21st centuries, repeat past urban-planning mistakes spread in Europe in the second half of the 20th century. High-rise construction in close proximity to historical centers of cities violates an established scale and destroys a historical city silhouette.
The visual-landscape analysis during the integration of high-rise buildings within the historic urban environment
Authors: Akristiniy Vera A. , Dikova Elena A.
Published: March 2018

The article is devoted to one of the types of urban planning studies - the visual-landscape analysis during the integration of high-rise buildings within the historic urban environment for the purposes of providing pre-design and design studies in terms of preserving the historical urban environment and the implementation of the reconstructional resource of the area. In the article formed and systematized the stages and methods of conducting the visual-landscape analysis taking into account the influence of high-rise buildings on objects of cultural heritage and valuable historical buildings of the city. Practical application of the visual-landscape analysis provides an opportunity to assess the influence of hypothetical location of high-rise buildings on the perception of a historically developed environment and optimal building parameters. The contents of the main stages in the conduct of the visual - landscape analysis and their key aspects, concerning the construction of predicted zones of visibility of the significant historically valuable urban development objects and hypothetically planned of the high-rise buildings are revealed. The obtained data are oriented to the successive development of the planning and typological structure of the city territory and preservation of the compositional influence of valuable fragments of the historical environment in the structure of the urban landscape. On their basis, an information database is formed to determine the permissible urban development parameters of the high-rise buildings for the preservation of the compositional integrity of the urban area.
Architecture of Stalingrad: the image of the hero city by the language of “Stalinist Empire style”
Authors: Ptichnikova Galina , Antyufeev Alexey
Published: March 2018

The article is dedicated to the peculiarities of the architecture of “Stalinist Empire style” by the example of Stalingrad architecture. This city was restored again after Stalingrad battle which took place in the period of 1942-1943, in accordance with the principals of socialist urban construction. Reconstruction of Stalingrad is considered by the authors of the article as the creation of a new type of a Soviet city – a Hero City. The authors reveal the artistic features of architectural ensembles and buildings designed according to the principles of “Stalinist Empire style”.
A composition for protection the stylobate in high-rise construction from the harmful effects of car exhaust gases
Authors: Sokolova Irina
Published: March 2018

In large cities, high-rise buildings are usually located along highways with heavy traffic. The study was carried out with the aim of creating a material for protection the stylobate of a high-rise building from the harmful effects of car exhaust gases. A polymer-silicate composition based on schungite and schungisite components is proposed. The composition has the properties of a wall material resistant to the corrosive environment of car exhaust gases. The results of the composition studies are presented. The possibility of increase the durability of exterior slabs for stylobate walls of high-rise buildings is substantiated, provided the proposed material is applied.
Choosing the function of mechanical properties of grounds and rock formations due to their heterogeneity
Authors: Frolova Irina , Agakhanov Murad
Published: March 2018

The development of computing techniques to analyze underground structures, buildings in high-rise construction that would fully take account of the conditions of their design and operation, as well as the real material properties, is one of the important trends in structural mechanics. For the territory in high-rise construction it is necessary to monitor the deformations of the soil surface. When high-rise construction is recommended to take into account the rheological properties and temperature deformations of the soil, the effect of temperature on the mechanical characteristics of the surrounding massif. Similar tasks also arise in the creation and operation of underground parts of high-rise construction, which are used for various purposes. These parts of the structures are surrounded by rock massifs of various materials. The actual mechanical characteristics of such materials must be taken into account. The objective property of nearly all materials is their non-homogeneity, both natural and technological. The work addresses the matters of building nonhomogeneous media initial models based on the experimental evidence. This made it possible to approximate real dependencies and obtain the appropriate functions in a simple and convenient way.
Calculation of PVC windows for wind loads in high-rise buildings
Authors: Konstantinov Aleksandr , Lambias Ratnayake Maya
Published: March 2018

In the following article we examine problems faced when designing PVC windows for high-rise buildings, which are usually not considered when constructing objects for massive sites, using a high-rise residential complex as an example. We address the matters related to wind loads on windows & statistical calculation of the impact of wind loads on them. We have presented variants of installing load-bearing elements of PVC windows which accept wind loads. We conducted a laboratory experiment by simulating wind loads on the window design, which is actually used for glazing the examined high-rise building. In the course of the experiment we determined additional factors which need to be considered when constructing PVC window structures for glazing high-rise buildings. We can determine that the following calculation method for the impact of wind load on PVC windows gives higher values of the desired statistical characteristics of load-bearing elements of a window compared to the results of laboratory experiments. We provide prerequisites to improve the analytical method of calculating impact of wind loads on load-bearing elements of PVC windows.
Determining the market value of high-rise residential buildings based on evaluation of consumer properties
Authors: Kolobova Svetlana
Published: March 2018

As you know, high-rise construction is an indicator of the practical implementation of advanced innovative technologies in the construction industry of the country. High-rise building inevitably comes to the big cities, in connection with the shortage and value of land. The life cycle of any construction project, including high-rise buildings consists of chains: of engineering survey - design-construction-operation. In the process of operation of a tall building, decisions about major repairs or reconstruction of a building are made for decision-making on further use. This article describes methods of assessing the consumer quality of high-rise residential buildings and the establishment of prices based on consumer characteristics of a tall residential building. It is proposed to assess the premises under their quality characteristics. The study was conducted to establish the influence of individual, comprehensive and integral indicators of comparable quality for effective quality living spaces. Simultaneously, there was established a relationship of quality with the consumer cost of housing, ultimately with the potential needs of owners, tenants of the home, lessor dwelling, or buyers of residential properties and other participants in the residential real estate market. This relationship further creates consumer requirements to quality standard of premises at a certain stage of socio-economic development.
Calculation of critical heat transfer in horizontal evaporator pipes in cooling systems of high-rise buildings
Authors: Aksenov Andrey , Malysheva Anna
Published: March 2018

An exact calculation of the heat exchange of evaporative surfaces is possible only if the physical processes of hydrodynamics of two-phase flows are considered in detail. Especially this task is relevant for the design of refrigeration supply systems for high-rise buildings, where powerful refrigeration equipment and branched networks of refrigerants are used. On the basis of experimental studies and developed mathematical model of asymmetric dispersed-annular flow of steam-water flow in horizontal steam-generating pipes, a calculation formula has been obtained for determining the boundaries of the zone of improved heat transfer and the critical value of the heat flux density. A new theoretical approach to the solution of the problem of the flow structure of a two-phase flow is proposed. The applied method of dissipative characteristics of a two-phase flow in pipes and the principle of a minimum rate of entropy increase in stabilized flows made it possible to obtain formulas that directly reflect the influence of the viscous characteristics of the gas and liquid media on their distribution in the flow. The study showed a significant effect of gravitational forces on the nature of the phase distribution in the cross section of the evaporative tubes. At a mass velocity of a two-phase flow less than 700 kg / m2s, the volume content of the liquid phase near the upper outer generating lines of the tube is almost an order of magnitude lower than the lower one. The calculation of the heat transfer crisis in horizontal evaporative tubes is obtained. The calculated dependence is in good agreement with the experimental data of the author and a number of foreign researchers. The formula generalizes the experimental data for pipes with the diameter of 6-40 mm in the pressure of 2-7 MPa.
Comparison of Thermal Stability of Dry High-strength Concrete and Wet High-strength Concrete
Authors: Musorina Tatiana , Katcay Aleksandr , Selezneva Anna , Kamskov Victor
Published: March 2018

High-strength concrete is a modern material, which occupies it`s own niche on the construction material market. It is applicable in a large-scale high-rise construction, particularly an underground construction is a frequently used solution for a space saving. Usually underground structure is related to a wet usage environment. Though not all properties of the high-strength concrete are investigated to the full extent. Under adverse climatic conditions of the Russian Federation one of the most important properties for constructional materials is a thermal capacity. Therefore, the main purpose of the paper is to compare a thermal capacity of the high-strength concrete in humid conditions and a thermal capacity of the high-strength concrete in dry operational condition. During the study dependency between thermal capacity and design wall thickness and ambient humidity has to be proven with two experiments. As a result the theoretical relation between thermal capacity characteristic – thermal inertia and wall thickness and ambient humidity was confirmed by the experimental data. The thermal capacity of a building is in direct ratio to the construction thickness. It follows from the experiments and calculations that wet high-strength concrete has less thermal stability.
The method of abstraction in the design of databases and the interoperability
Authors: Yakovlev Nikolay
Published: March 2018

When designing the database structure oriented to the contents of indicators presented in the documents and communications subject area. First, the method of abstraction is applied by expansion of the indices of new, artificially constructed abstract concepts. The use of abstract concepts allows to avoid registration of relations many-to-many. For this reason, when built using abstract concepts, demonstrate greater stability in the processes. The example abstract concepts to address structure – a unique house number. Second, the method of abstraction can be used in the transformation of concepts by omitting some attributes that are unnecessary for solving certain classes of problems. Data processing associated with the amended concepts is more simple without losing the possibility of solving the considered classes of problems. For example, the concept "street" loses the binding to the land. The content of the modified concept of "street" are only the relations of the houses to the declared name. For most accounting tasks and ensure communication is enough.
Industrial waste utilization in the panels production for high buildings facade and socle facing
Authors: Vitkalova Irina , Torlova Anastasiya , Pikalov Evgeniy , Selivanov Oleg
Published: March 2018

The research presents comprehensive utilization of such industrial waste as galvanic sludge, broken window glass as functional additives for producing ceramics for facade and socle paneling in high-rise construction. The basic charge component is low-plasticity clay, which does not allow producing high-quality products if used without any functional additives. The application of the mentioned above components broadens the resource base, reduces production cost and the mass of the products in comparison with the currently used facing ceramics. The decrease of product mass helps to reduce the load on the basement and to use ceramic material in high-rise construction more effectively. Additional advantage of the developed composition is the reducing of production energy intensity due to comparatively low pressing pressure and firing temperature thus reducing the overall production cost. The research demonstrates the experimental results of determining density, compressive strength, water absorption, porosity and frost resistance of the produced ceramic material. These characteristics prove that the material can be applied for high buildings outdoor paneling. Additional research results prove ecologic safety of the produced ceramic material.
Development of innovative methods for risk assessment in high-rise construction based on clustering of risk factors
Authors: Okolelova Ella , Shibaeva Marina , Shalnev Oleg
Published: March 2018

The article analyses risks in high-rise construction in terms of investment value with account of the maximum probable loss in case of risk event. The authors scrutinized the risks of high-rise construction in regions with various geographic, climatic and socio-economic conditions that may influence the project environment. Risk classification is presented in general terms, that includes aggregated characteristics of risks being common for many regions. Cluster analysis tools, that allow considering generalized groups of risk depending on their qualitative and quantitative features, were used in order to model the influence of the risk factors on the implementation of investment project. For convenience of further calculations, each type of risk is assigned a separate code with the number of the cluster and the subtype of risk. This approach and the coding of risk factors makes it possible to build a risk matrix, which greatly facilitates the task of determining the degree of impact of risks. The authors clarified and expanded the concept of the price risk, which is defined as the expected value of the event, 105 which extends the capabilities of the model, allows estimating an interval of the probability of occurrence and also using other probabilistic methods of calculation.
The substantiation of methodical instrumentation to increase the tempo of high-rise construction in region
Authors: Belyaeva Svetlana , Makeeva Tatyana , Chugunov Andrei , Andreeva Peraskovya
Published: March 2018

One of the important conditions of effective renovation of accommodation in region on the base of realization of high-rise construction projects is attraction of investments by forming favorable investment climate, as well as reduction if administrative barriers in construction and update of main funds of housing and communal services. The article proposes methodological bases for assessing the state of the investment climate in the region, as well as the methodology for the formation and evaluation of the investment program of the housing and communal services enterprise. The proposed methodologies are tested on the example of the Voronezh region. Authors also showed the necessity and expediency of using the consulting mechanism in the development of state and non-state investment projects and programs.
Formation of the portfolio of high-rise construction projects on the basis of optimization of «risk-return» rate
Authors: Uvarova Svetlana , Kutsygina Olga , Smorodina Elena , Gumba Khuta
Published: March 2018

The effectiveness and sustainability of an enterprise are based on the effectiveness and sustainability of its portfolio of projects. When creating a production program for a construction company based on a portfolio of projects and related to the planning and implementation of initiated organizational and economic changes, the problem of finding the optimal "risk-return" ratio of the program (portfolio of projects) is solved. The article proposes and approves the methodology of forming a portfolio of enterprise projects on the basis of the correspondence principle. Optimization of the portfolio of projects on the criterion of "risk-return" also contributes to the company's sustainability.
Strategic advantages of high-rise construction
Authors: Yaskova Natalya
Published: March 2018

Traditional methods to assess the competitiveness of different types of real estate in the context of huge changes of new technological way of life don’t provide building solutions that would be correct from a strategic perspective. There are many challenges due to changes in the consumers’ behavior in the housing area. A multiplicity of life models, a variety of opportunities and priorities, traditions and new trends in construction should be assessed in terms of prospective benefits in the environment of the emerging new world order. At the same time, the mane discourse of high-rise construction mainly relates to its design features, technical innovations, and architectural accents. We need to clarify the criteria for economic evaluation of high-rise construction in order to provide decisions with clear and quantifiable contexts. The suggested approach to assessing the strategic advantage of high-rise construction and the prospects for capitalization of high-rise buildings poses new challenges for the economy to identify adequate quantitative assessment methods of the high-rise buildings economic efficiency, taking into account all stages of their life cycle.
Economic efficiency of high-rise construction in the Moscow program of renovation of housing stock
Authors: Misailovov Andrey
Published: March 2018

The article considers a new initiative of the regional authorities of updating the housing stock designated as the renovation of housing. Its main aspects are analyzed, including the nature of program, economic efficiency of its implementation due to high-rise construction and the regulatory and legislative framework, the procedure for implementing the program, and the time frame for its implementation. The role of the program for regions in which high depreciation of the housing stock is combined with a limited number of sites for a new housing construction is disclosed. The high-rise construction in the renovation program is presented as a variant of a successful solution not only of the tasks of renovating the housing stock, but also of filling the regional budget. The social and economic orientation of the high-rise construction and the involvement of residents in the process of making town-planning decisions in the field of high-rise construction at all stages of implementing the program are shown.
High-rise housing construction as a way of solving the problem of providing people with comfortable habitation
Authors: Misailovov Andrey
Published: March 2018

The article analyzes the role of high-rise construction in solving the problem of providing people with comfortable habitation. High-rise construction is considered as a part of urban environment of big cities, a way of effective land use and development of entrepreneurship, including small and medium-sized enterprises. The economic efficiency of high-rise construction, an increase in budgetary financing and the number of introduced innovations are discussed.
Working capital management in the process of financial support of investment and construction projects and of the construction material industry
Authors: Danilochkina Nadezhda , Lukmanova Inessa , Roshchina Olga , Voytolovskiy Nikolay
Published: March 2018

The article presents the analysis of working capital in the process of financial support of high-rise construction investment projects. The factors influencing the choice of the working capital management model were analyzed, the reasons of the change in the requirement for the values of current assets in the process of construction of high-rise facilities were determined. The author has developed the scheme of interrelation between production, operational and financial activity cycles of enterprises implementing investment projects of unique buildings and structures and made a comparative description of their financing sources.
Algorithm for evaluating the effectiveness of a high-rise development project based on current yield
Authors: Soboleva Elena
Published: March 2018

The article is aimed at the issues of operational evaluation of development project efficiency in high-rise construction under the current economic conditions in Russia. The author touches the following issues: problems of implementing development projects, the influence of the operational evaluation quality of high-rise construction projects on general efficiency, assessing the influence of the project’s external environment on the effectiveness of project activities under crisis conditions and the quality of project management. The article proposes the algorithm and the methodological approach to the quality management of the developer project efficiency based on operational evaluation of the current yield efficiency. The methodology for calculating the current efficiency of a development project for high-rise construction has been updated.
Problems and solutions in the field of improving control and supervision activities in the construction sector
Authors: Dikareva Varvara , Mostovaya Anna
Published: March 2018

The improvement of control and supervision activities in high-rise construction is an important goal of the state. In the paper, the author considered the initiatives of the state in terms of improving the control activity. He shows the main approaches that will be applied by the state. The application of information and communication technologies in control activities is described in detail. It was noted that the quality of the regulation of various procedures remains a serious issue. At the same time, modern innovations in the field of control should take into account the increasing volumes of data and information about various economic processes.
Non-price competition in the regional high-rise construction market
Authors: Ganebnykh Elena , Burtseva Tatyana , Gurova Ekaterina , Polyakova Irina
Published: March 2018

The article analyzes the market of high-rise residential construction in the city of Kirov (Russia). A minimal significance of price factors has been revealed in the process of the market analysis. This suggests that a lower price does not guarantee an increase in consumer demand. Thus, factors of non-price competition are of great importance in the market in question. The expert survey has identified the factors of non-price competition which influence consumer perceptions. A perceptual map has been constructed on the basis of the identified factors by means of the factor analysis to determine the positioning of each high-rise building relative to the consumer requirements. None of the high-rise residential buildings in the market in question meets the consumers’ expectations of an “ideal facility”.
Leasing instruments of high-rise construction financing
Authors: Aleksandrova Olga , Ivleva Elena , Sukhacheva Viktoria , Rumyantseva Anna
Published: March 2018

The leasing sector of the business economics is expanding. Leasing instruments for high-rise construction financing allow to determine the best business behaviour in the leasing economy sector, not only in the sphere of transactions with equipment and vehicles. Investments in high-rise construction have a multiplicative effect. It initiates an active search and leasing instruments use in the economic behaviour of construction organizations. The study of the high-rise construction sector in the structure of the leasing market participants significantly expands the leasing system framework. The scheme of internal and external leasing process factors influence on the result formation in the leasing sector of economy is offered.