bluuebunny/crossref_metadata_2025 huggingface dataset:
SnGa2GeSe6, a benign addition to the AMIII2MIVQ6 family: synthesis, crystal structure and nonlinear optical performance
Authors: Li Zhuang , Zhang Shengzi , Guo Yangwu , Lin Zheshuai , Yao Jiyong , Wu Yicheng
Published: April 2019

A new noncentrosymmetric compound SnGa2GeSe6 exhibits a crisscross network of two types of infinite chains and intriguing nonlinear optical performance.
Syntheses of water-soluble acyclic naphthalene oligomers and their applications in water
Authors: Wang Yang , Liu Tianyin , Jiang Jie , Chen Yanmei , Cen Moupan , Lu Dou , Cao Leyu , Sun Siyu , Yao Yong
Published: April 2019

Water-soluble –CH2– bridged acyclic naphthalene oligomers were designed and prepared successfully. Interestingly, they can be used in reversible dispersion of carbon nanotubes in water by changing the pH.
Synthesis and hypergolic properties of flammable ionic liquids based on the cyano (1H-1,2,3-triazole-1-yl) dihydroborate anion
Authors: Wang Zhi , Jin Yunhe , Zhang Wenquan , Wang Binshen , Liu Tianlin , Zhang Jiaheng , Zhang Qinghua
Published: April 2019

A family of ionic liquids based on the cyano (1H-1,2,3-triazole-1-yl) dihydroborate anion was developed, which showed hypergolic reactivity with white fuming nitric acid. Furthermore, these ionic liquids can be ignited upon contact with 90 wt% H2O2 in the presence of iodine.
Bioengineering fluorescent virus-like particle/RNAi nanocomplexes act synergistically with temozolomide to eradicate brain tumors
Authors: Pang Hao-Han , Huang Chiung-Yin , Chou Ya-Wen , Lin Chia-Jung , Zhou Zi-Lin , Shiue Yow-Ling , Wei Kuo-Chen , Yang Hung-Wei
Published: April 2019

We present a unique one-pot fabrication of fluorescent VLP/RNAi-based gene therapy through bioproduction in E. coli to promote temozolomide chemotherapy.
Second near-infrared photodynamic therapy and chemotherapy of orthotopic malignant glioblastoma with ultra-small Cu2−xSe nanoparticles
Authors: Zhang Hao , Wang Tingting , Liu Hanghang , Ren Feng , Qiu Weibao , Sun Qiao , Yan Fei , Zheng Hairong , Li Zhen , Gao Mingyuan
Published: April 2019

Herein we synthesize DOX-loaded ultra-small Cu2−xSe nanoparticles for the NIR-II photodynamic therapy and chemotherapy of orthotopic malignant glioblastoma.
ZnO decorated Sn3O4 nanosheet nano-heterostructure: a stable photocatalyst for water splitting and dye degradation under natural sunlight
Authors: Balgude Sagar D. , Sethi Yogesh A. , Kale Bharat B. , Amalnerkar Dinesh P. , Adhyapak Parag V.
Published: April 2019

Herein, a facile hydrothermally-assisted sonochemical approach for the synthesis of a ZnO decorated Sn3O4 nano-heterostructure is reported.
Stress fluctuations in transient active networks
Authors: Goldstein Daniel , Ramaswamy Sriram , Chakraborty Bulbul
Published: April 2019

We study the impact of effects strongly non-affine effects and states of “self-stress” on transient active networks.
Temperature-responsive self-assembled nanostructures from lysine-based surfactants with high chain length asymmetry: from tubules and helical ribbons to micelles and vesicles
Authors: Oliveira Isabel S. , Lo Mikail , Araújo Maria J. , Marques Eduardo F.
Published: April 2019

Stimuli-sensitive self-assembled nanostructures are relevant for efficient drug delivery and nanomaterial templating.
Role of water in the formation of unusual organogels with cyclo(leucyl–leucyl)
Authors: Safiullina Aisylu S. , Ziganshina Sufia A. , Lyadov Nikolay M. , Klimovitskii Alexander E. , Ziganshin Marat A. , Gorbatchuk Valery V.
Published: April 2019

Water and cyclo(leucyl–leucyl) organogels: “Water helps cyclo(Leu–Leu) to form organogels. Cyclo(Leu–Leu) helps to purify water”.
Four novel polymorphisms in long non-coding RNA HOTTIP are associated with the risk and prognosis of colorectal cancer
Authors: Lv Zhi , Xu Qian , Sun Liping , Wen Jing , Fang Xinxin , Xing Chengzhong , Yuan Yuan
Published: April 2019

Background: The role of long non-coding RNA (lncRNA) HOXA transcript at the distal tip (HOTTIP) as an oncogene in varieties of human cancer including colorectal cancer (CRC) has been extensively researched. The expression and function of lncRNAs could be affected by single nucleotide polymorphisms (SNPs), which are associated with cancer susceptibility and prognosis. However, no investigation has focused on the association between HOTTIP SNPs and CRC. The aim of the present study was to explore the association of polymorphisms in the lncRNA HOTTIP gene with CRC risk and prognosis. Methods: A total of 1848 subjects were enrolled in our study, including 884 CRC cases and 964 controls. Genotyping for five HOTTIP tagSNPs (rs3807598, rs17501292, rs2067087, rs17427960, and rs78248039) was performed by applying Kompetitive allele specific PCR (KASP). Results: The results showed three SNPs (rs3807598, rs2067087, and rs17427960) were associated with enhanced CRC risk both in overall and stratified analysis. One polymorphism, rs17501292, could improve the overall survival (OS) of CRC patients in the tumor of ulcerative/invasive-type subgroup. Conclusion: These findings suggest HOTTIP SNPs could potentially be predictive biomarkers for CRC risk and prognosis. The present study provides clues for further exploration of novel lncRNA-based genetic biomarkers to predict CRC susceptibility as well as clinical outcome.
Hemogram and iron indices in renal anemia and the amelioration with Carica papaya leaf extract applied on albino rat model
Authors: Gheith Ibtsam , El-Mahmoudy Abubakr
Published: April 2019

The present study was designed to look at the hematological disorders in gentamicin nephrotoxicity model, as kidney is considered as one of the hemopoietic organs. In a previous study, novel and classical kidney injury biomarkers were utilized to evaluate the nephroprotective potential of Carica papaya leaf extract (CPLE) in the same model in albino rats. Gentamicin (100 mg/kg, subcutaneously, for 21 consecutive days) resulted in significant decreases in red blood cell (RBC) count, hemoglobin concentration (HGB), and packed cell volume (PCV) value, with minimal alterations in erythrocytic indices. Leucogram showed leukocytosis, granulocytosis, and thrombocytopenia. Erythropoietin (EPO) levels were also drastically decreased by the end of the experimental course. Serum iron, unsaturated iron-binding capacity (UIBC), total iron binding capacity (TIBC), transferrin saturation %, and serum transferrin concentration values were significantly decreased in contrast to ferritin, which was increased. When concurrently administered with gentamicin, CPLE (150 and 300 mg/kg, orally via gastric tube, for 21 days) significantly protected against the drastic effects of the former on the blood profile with improving potentials on erythrogram, leukogram, thrombocytes, EPO, iron and its indices, in a dose-dependent manner. These data may suggest CPLE as an appreciated blood homeostatic and nephroprotective agent from a natural source that could be a good remedy in conditions associated with blood disorders.
Acetylation & Co: an expanding repertoire of histone acylations regulates chromatin and transcription
Authors: Barnes Claire E. , English David M. , Cowley Shaun M.
Published: April 2019

Packaging the long and fragile genomes of eukaryotic species into nucleosomes is all well and good, but how do cells gain access to the DNA again after it has been bundled away? The solution, in every species from yeast to man, is to post-translationally modify histones, altering their chemical properties to either relax the chromatin, label it for remodelling or make it more compact still. Histones are subject to a myriad of modifications: acetylation, methylation, phosphorylation, ubiquitination etc. This review focuses on histone acylations, a diverse group of modifications which occur on the ε-amino group of Lysine residues and includes the well-characterised Lysine acetylation. Over the last 50 years, histone acetylation has been extensively characterised, with the discovery of histone acetyltransferases (HATs) and histone deacetylases (HDACs), and global mapping experiments, revealing an association of hyperacetylated histones with accessible, transcriptionally active chromatin. More recently, there has been an explosion in the number of unique short chain ‘acylations’ identified by MS, including: propionylation, butyrylation, crotonylation, succinylation, malonylation and 2-hydroxyisobutyrylation. These novel modifications add a range of chemical environments to histones, and similar to acetylation, appear to accumulate at transcriptional start sites and correlate with gene activity.
Disordered domains in chromatin-binding proteins
Authors: Watson Matthew , Stott Katherine
Published: April 2019

Chromatin comprises proteins, DNA and RNA, and its function is to condense and package the genome in a way that allows the necessary transactions such as transcription, replication and repair to occur in a highly organised and regulated manner. The packaging of chromatin is often thought of in a hierarchical fashion starting from the most basic unit of DNA packaging, the nucleosome, to the condensation of nucleosomal ‘beads on a string’ by linker histones to form the 30-nm fibre and eventually large chromatin domains. However, a picture of a more heterogeneous, dynamic and liquid-like assembly is emerging, in which intrinsically disordered proteins (IDPs) and proteins containing intrinsically disordered regions (IDRs) play a central role. Disorder features at all levels of chromatin organisation, from the histone tails, which are sites of extensive post-translational modification (PTM) that change the fate of the underlying genomic information, right through to transcription hubs, and the recently elucidated roles of IDPs and IDRs in the condensation of large regions of the genome through liquid–liquid phase separation.
CTCF: a Swiss-army knife for genome organization and transcription regulation
Authors: Braccioli Luca , de Wit Elzo
Published: April 2019

Orchestrating vertebrate genomes require a complex interplay between the linear composition of the genome and its 3D organization inside the nucleus. This requires the function of specialized proteins, able to tune various aspects of genome organization and gene regulation. The CCCTC-binding factor (CTCF) is a DNA binding factor capable of regulating not only the 3D genome organization, but also key aspects of gene expression, including transcription activation and repression, RNA splicing, and enhancer/promoter insulation. A growing body of evidence proposes that CTCF, together with cohesin contributes to DNA loop formation and 3D genome organization. CTCF binding sites are mutation hotspots in cancer, while mutations in CTCF itself lead to intellectual disabilities, emphasizing its importance in disease etiology. In this review we cover various aspects of CTCF function, revealing the polyvalence of this factor as a highly diversified tool for vertebrate genome organization and transcription regulation.
Automatic classification of linear modulations using multiple receivers in the presence of symbol timing uncertainty
Authors: Efendi E. , Dulek B.
Published: April 2019

Modulation classification of signals collected from multiple receivers over additive white Gaussian noise channels is considered. It is assumed that the channel between the transmitter and each receiver is subject to unknown flat block fading and symbol timing uncertainty. Following the hybrid likelihood framework, the likelihood function of the waveforms observed at the receivers is marginalised over the distribution of the transmitted symbol sequence. Then, the parameter estimates obtained by the particle swarm optimisation technique are substituted into the average likelihood expression in order to compute the test statistic for each assumed modulation scheme. A classification decision is declared in favour of the modulation scheme with the highest overall likelihood score. Numerical examples are provided to evaluate the performance of the proposed classifier as a function of the average received signal‐to‐noise ratio for different number of receivers and varying quality of the initial parameter estimates.
Generalised ‐gain of switched non‐linear systems
Authors: Li Chensong , Zhao Jun
Published: April 2019

In this study, a generalised ‐gain property for switched systems is presented by using multiple storage functions. The new notion describes the non‐uniform gain property for switched systems characterised by a positive function of the state. For interconnected switched systems, a small‐gain theorem using generalised ‐gain is obtained, which generalises the well known small‐gain theorem. Moreover, if each subsystem of a switched system does not admit a generalised ‐gain, by choosing an appropriate switching law, the overall system can be made to satisfy a generalised ‐gain condition. Furthermore, the authors propose an invariance principle for switched non‐linear systems based on which sufficient conditions for attractivity with respect to a set are given for switched systems with the generalised ‐gain property. Finally, two examples are provided to illustrate the effectiveness of the main results.
Robustness‐oriented distributed cooperative control for ac microgrids under complex environments
Authors: Lai Jingang , Lu Xiaoqing , Dong Zhengcheng , Tang Ruo‐li , Li Xin
Published: April 2019

In this study, the power sharing problem of ac microgrids with massive penetration of photovoltaic generators (PVG) is addressed. A robust distributed cooperative control strategy is proposed to control multiple PVGs in ac microgrids under a complex environment (e.g. subject to transmission time delays and noise disturbances). The existing distributed control strategies have been commonly designed assuming ideal communication among PVGs. However, due to inherent communication delays and environmental noises, the real‐life practical channels are affected by time delay and additive noise leading each PVG to receive measurements of the states of its neighbours. Thus, the proposed distributed cooperative control strategy will achieve the accurate power sharing property among PVGs through a sparse communication network subject to time delays and noise disturbances. The theoretical concepts and necessary conditions for stability and robust performance of the proposed distributed cooperative control strategy are outlined by the Lyapunov functional method and stochastic differential equation theory. Furthermore, the proposed control strategy is fully implemented and thus satisfies the plug‐and‐play feature of the future smart grid. Simulation results on an islanded microgrid test system are provided to reveal the effectiveness of the proposed control method to provide accurate proportional power sharing in the MATLAB/SimPowerSystems Toolbox.
Dense small face detection based on regional cascade multi‐scale method
Authors: Ke Xiao , Li Jianping , Guo Wenzhong
Published: April 2019

In the field of object detection, the research on the problem of detecting small face is the most extensive, but when there are objects with obvious scale differences in the image, the detection performance is not obvious, which is due to the scale invariance properties of the deep convolutional neural networks. Although in recent years, there have been some methods proposed to solve this problem such as FPN and SNIP, which is based on feature pyramid. However, they have not fundamentally solved the problem. A regional cascade multi‐scale detection method has been proposed. First, a global detector and several local detectors have been trained, respectively. The global detector is trained by the original training set, while the local detector is trained by the sub‐training set generated by the original training set. Second, the global detector can detect object roughly and the local detectors can produce more detailed results that improve the performance of global detector. Finally, to integrate the detection results of global detector and local detectors as the output, non‐maximum suppression methods are used. The method can be carried in any depth model of object detection, has good scalability, and is more suitable for dense face detection.
Prediction of traffic volume by mining traffic sequences using travel time based PrefixSpan
Authors: Ganapathy Jayanthi , Paramasivam Jothilakshmi
Published: April 2019

Traffic pattern analysis is an active and essential part of transportation research. When traffic condition is adverse and unprecedented, traffic sequences are useful in the analysis of traffic behaviour. The sequence through which traffic congestion has arisen can be predicted using sequence rules from the generated traffic sequence. This work aims at mining traffic sequence pattern and prediction of traffic volume based on traffic sequence rules. To mine peak hour traffic sequences in order to make better travel decision, travel time based PrefixSpan (TT‐PrefixSpan) algorithm is proposed to analyse traffic flow on highways. As a result, the prediction of traffic volume is effected by the generated traffic sequences. Such analysis would pave the way for devising data driven computational methods in reducing traffic congestion. Real‐time traffic volume data for 53 weeks is collected at a centralised toll system comprising toll collections centres at three different sites. To show the significance of this problem‐solving approach, TT‐PrefixSpan is experimented on three different sites. The extraction of a frequent traffic sequence pattern is reported with experimental analysis. The evaluation of different traffic condition present at each site has shown promising results. Towards the end, a summary of results is presented with directions for future research.
Analysis of braking intention based on fNIRS in driving simulation experiments
Authors: Zhu Lei , Li Shuguang , Li Yaohua , Wang Min , Zhang Chenyang , Li Yanyu , Yao Jin , Ji Hao
Published: April 2019

Cooperative driving refers to a notion that advanced driver assistance system (ADAS) sharing the control with human driver and completing driving task together. One of the key technologies is that the ADAS can identify the driver's driving intention in real time to implement consistent driving decisions. Based on driving simulator (DS) and functional near‐infrared spectroscopy (fNIRS) experiments, this study established a model of driver's brake intention identification with machine‐learning algorithms and analysed cerebral cortex activity mechanism of the driver's brake intention with parametric test. This study suggested that the test accuracy of the model established here was 90.91%. Moreover, the activity in the Brodmann area 7 (BA7), BA17, and BA40 in cerebral cortex was significantly different between the driver with braking intention and those with driving at constant speed (p  < 0.05). The study presented here not only identified the driver's driving intention through fNIRS for the first time, but also analysed the brain activity of the drivers when he had the braking intention. It lays a foundation for the future research on the driving cognitive model about human perception and driver's driving intention identification.
Aqueous‐phase reforming of phenol over hydrotalcite‐derived Ni/Zn/Al catalysts
Authors: Li Xiangping , Zhang Jianguang , Xu Ningge , Chen Guanyi , Yan Beibei
Published: April 2019

With the depletion of non‐regenerated energy and the increasing awareness of environmental protection, renewable energy developing has become a key subject of research. Hydrogen as a kind of clean energy has aroused much attention. In this study, hydrogen production from bio‐oil derived phenolic compound in aqueous phase was studied. Hydrotalcite‐derived Ni/Zn/Al catalysts with different metallic compositions were synthesised and screened for aqueous‐phase reforming (APR) of phenol. The physiochemical characterisations of hydrotalcite‐derived Ni/Zn/Al samples were detected by X‐ray powder diffraction (XRD), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR) and N2‐sorption. In the calcined hydrotalcite‐derived Ni5.3/Zn2.7/Al samples, most of the metal oxides exist in the form of rock solid and wurtzite type phase. In order to optimise the reaction condition of APR of phenol, the impacts of initial phenol concentration, reaction pressure and reaction temperature during the APR of phenol were investigated. It was found that increasing the concentration of phenol could enhance the side reaction and decrease the selectivity of hydrogen, while enhancing the reaction pressure was not favourable for hydrogen production. Moreover, proper reaction temperature was necessary for APR of phenol to produce hydrogen over hydrotalcite‐derived Ni/Zn/Al catalysts.
Resilient wide‐area monitoring and protection scheme with IEEE Std. C37.118.1‐2011 criteria for complex smart grid system using phase diagram
Authors: Eissa Moustafa M.
Published: April 2019

Challenges facing power system protection in a wide‐area system are latency and full coverage of a wide‐area disturbance. The complexity of large‐scale power system configurations has led to challenges in the design of coordination and operating systems for protection relays. Local measurements used for primary and backup protection cannot consider wide system disturbances. A new wide‐area‐monitoring‐system‐based primary protection is presented for a complex power system involving double and single lines. It is based on describing the non‐linear dynamic operation of the transmission lines during a fault in the form of a set of differential equations that are solved through paths movements in a phase diagram. The fault on the lines can be precisely recognised. The speed of the traditional communication media limits wide‐area monitoring as backup protection. This study presents the primary protection scheme for double and single circuits in a wide area for the first time based on fourth‐generation technology with low latency. The justification for applying the proposed scheme as primary protection in a wide‐area‐monitoring system is discussed. The number of relays on the studied configuration is reduced from 18 local relays to only 5 phasor measurement units for protecting the lines in the area.
Development of mobile electrical vehicle for EMI applications
Authors: Leuchter Jan , Quang Huy Dong , Popela Miroslav
Published: April 2019

This paper presents the relevancy, design, and test results of a mobile electrical vehicle for the applications of testing and providing electromagnetic interferences in Wi‐Fi signal in the band 2.4–2.5 GHz. The mobile device includes power electronics supplying a magnetron device for the interference. Propulsion of the mobile device is implemented by using a system of stepper motors. The mobile device is controlled with the help of the microcontroller ATmega 16. For the interfering part, it is necessary to design the power electronics to supply the magnetron from the battery. The power electronics interface between a battery and magnetron must be able to transfer output battery voltage 12 VDC to the variable output 4000 VAC and power around 1 kW. The magnetron is used as a source of electromagnetic interference high‐frequency acting on targets, which operates in the band of Wi‐Fi signal. In addition, the system must be able to control the direction and power of EMI interferences. The investigations of the power‐efficiency of power inverter versus power density will be discussed and optimised here.
Evolution of rotation in rapidly rotating early-type stars during the main sequence with 2D models
Authors: Gagnier D. , Rieutord M. , Charbonnel C. , Putigny B. , Espinosa Lara F.
Published: April 2019

The understanding of the rotational evolution of early-type stars is deeply related to that of anisotropic mass and angular momentum loss. In this paper, we aim to clarify the rotational evolution of rapidly rotating early-type stars along the main sequence (MS). We have used the 2D ESTER code to compute and evolve isolated rapidly rotating early-type stellar models along the MS, with and without anisotropic mass loss. We show that stars with Z = 0.02 and masses between 5 and 7 M⊙ reach criticality during the main sequence provided their initial angular velocity is larger than 50% of the Keplerian one. More massive stars are subject to radiation-driven winds and to an associated loss of mass and angular momentum. We find that this angular momentum extraction from the outer layers can prevent massive stars from reaching critical rotation and greatly reduce the degree of criticality at the end of the MS. Our model includes the so-called bi-stability jump of the Ṁ − Teff relation of 1D-models. This discontinuity now shows up in the latitude variations of the mass-flux surface density, endowing rotating massive stars with either a single-wind regime (no discontinuity) or a two-wind regime (a discontinuity). In the two-wind regime, mass loss and angular momentum loss are strongly increased at low latitudes inducing a faster slow-down of the rotation. However, predicting the rotational fate of a massive star is difficult, mainly because of the non-linearity of the phenomena involved and their strong dependence on uncertain prescriptions. Moreover, the very existence of the bi-stability jump in mass-loss rate remains to be substantiated by observations.
Detection of intercluster gas in superclusters using the thermal Sunyaev–Zel’dovich effect
Authors: Tanimura H. , Aghanim N. , Douspis M. , Beelen A. , Bonjean V.
Published: April 2019

Using a thermal Sunyaev–Zel’dovich (tSZ) signal, we search for hot gas in superclusters identified using the Sloan Digital Sky Survey Data Release 7 (SDSS/DR7) galaxies. We stack a Comptonizationymap produced by thePlanckCollaboration around the superclusters and detect the tSZ signal at a significance of 6.4σ. We further search for an intercluster component of gas in the superclusters. For this, we remove the intracluster gas in the superclusters by masking all galaxy groups/clusters detected by thePlancktSZ, ROSAT X-ray, and SDSS optical surveys down to a total mass of 1013 M⊙. We report the first detection of intercluster gas in superclusters withy = (3.5 ± 1.4) × 10−8at a significance of 2.5σ. Assuming a simple isothermal and flat density distribution of intercluster gas over superclusters, the estimated baryon density is (Ωgas/Ωb)×(Te/8 × 106 K) = 0.067 ± 0.006 ± 0.025. This quantity is inversely proportional to the temperature, therefore taking values from simulations and observations, we find that the gas density in superclusters may account for 17–52% of missing baryons at low redshifts. A better understanding of the physical state of gas in the superclusters is required to accurately estimate the contribution of our measurements to missing baryons.
Layered semi-convection and tides in giant planet interiors
Authors: André Q. , Mathis S. , Barker A. J.
Published: April 2019

Context. Recent Juno observations have suggested that the heavy elements in Jupiter could be diluted throughout a large fraction of its gaseous envelope, providing a stabilising compositional gradient over an extended region of the planet. This could trigger layered semi-convection, which, in the context of giant planets more generally, may explain Saturn’s luminosity excess and play a role in causing the abnormally large radii of some hot Jupiters. In giant planet interiors, it could take the form of density staircases, which are convective layers separated by thin stably stratified interfaces. In addition, the efficiency of tidal dissipation is known to depend strongly on the planetary internal structure.

Aims. We aim to study the resulting tidal dissipation when internal waves are excited in a region of layered semi-convection by tidal gravitational forcing due to other bodies (such as moons in giant planet systems, or stars in hot Jupiter systems).

Methods. We adopt a local Cartesian model with a background layered density profile subjected to an imposed tidal forcing, and we compute the viscous and thermal dissipation rates numerically. We consider two sets of boundary conditions in the vertical direction: periodic boundaries and impenetrable, stress-free boundaries, with periodic conditions in the horizontal directions in each case. These models are appropriate for studying the forcing of short-wavelength tidal waves in part of a region of layered semi-convection, and in an extended envelope containing layered semi-convection, respectively.

Results. We find that the rates of tidal dissipation can be enhanced in a region of layered semi-convection compared to a uniformly convective medium, where the latter corresponds with the usual assumption adopted in giant planet interior models. In particular, a region of layered semi-convection possesses a richer set of resonances, allowing enhanced dissipation for a wider range of tidal frequencies. The details of these results significantly depend on the structural properties of the layered semi-convective regions.

Conclusions. Layered semi-convection could contribute towards explaining the high tidal dissipation rates observed in Jupiter and Saturn, which have not yet been fully explained by theory. Further work is required to explore the efficiency of this mechanism in global models.
GO-modified membranes for vanadium redox flow battery
Authors: Sophia Saidatul , Abouzari Lotf Ebrahim , Ahmad Arshad , Moozarm Nia Pooria , Rasit Ali Roshafima
Published: April 2019

Graphene oxide (GO) has attracted tremendous attention in membrane-based separation field as it can filter ions and molecules. Recently, GO-based materials have emerged as excellent modifiers for vanadium redox flow battery (VRFB) application. Its high mechanical and chemical stability, nearly frictionless surface, high flexibility, and low cost make GO-based materials as proper materials for the membranes in VRFB. In VRFB, a membrane acts as the key component to determine the performance. Therefore, employing low vanadium ion permeability with excellent stability membrane in vanadium electrolytes is important to ensure high battery performance. Herein, recent progress of GO-modified membranes for VRFB is briefly reviewed. This review begins with current membranes used for VRFB, followed by the challenges faced by the membranes. In addition, the transport mechanism of vanadium ion and the stability properties of GO-modified membranes are also discussed to enlighten the role of GO in the modified membranes.
Assessment Model for Construct Occupational Accident Using Confirmatory Factor Analysis
Authors: Nizar Jusoh , Ali Mohamad Wijayanuddin , Tuan Amran Tuan Abdullah , Alias Husain , Chik Zamri
Published: April 2019

The objective of this paper is to assess the occupational accident model construct using confirmatory factor analysis (CFA). The data for the study were obtained from the questionnaire survey using Likert scale rated 1 to 10 on 450 workers at the oil and gas terminal in Terengganu. CFA was used to verify the fitness of measurement model construct of occupational accident. A total of 53 significant items for the overall variables of occupational accident input were studied. In conclusion, all the variables of occupational accident construct such as engineering, human, and technical factors comply with the requirements of dimensions, validity, and reliability of the CFA requirement.
Numerical modeling of the microclimate and air quality of an Orthodox church in Saint-Petersburg
Authors: Sukhanova Inna
Published: April 2019

A numerical model of the microclimate and air quality in the premises of an Orthodox church is built in STAR CCM+ software. The building of the Church of the Nativity with a capacity of 900 people in St. Petersburg was adopted for modeling. The model takes into account features of architecture, heating equipment, the number of people and candles. There is a warm floor in the prayer hall to compensate for the loss of heat. The supply of fresh air in the serviced area is provided by inclined falling jets, and the removal of air is provided through the transom. The distribution of velocity and temperature fields and concentrations of CO2 in the main premises of the church (vestibule, prayer hall, altar) was obtained under non-stationary operation and full capacity of the church. The conclusion was made about the provision of normalized microclimate parameters in the premises of the church with the adopted design solutions for heating and ventilation systems.
Temperature distribution in concrete structure under the action of fire using Ansys software
Authors: Nguyen Trong Chuc , Mai Viet Chinh , Luu Xuan Bach
Published: April 2019

In the last few decades, fires caused serious damage in civil engineering, especially in the high-rise building, factories, offices, etc. Usually the structures are built with fireproof materials such as concrete. It is a complex material, and its properties can change dramatically when exposed to high temperatures. This problem requires engineers to study and evaluate the effect of the fire in the structure. This paper studies the effect of the fire on the temperature distribution in concrete structure using Finite Element Ansys software. The results will be used to provide reference data for concrete structures under the action of fire. The research is an intermediate task to convert the fire activity in a structural model into the real impact in calculating model. It plays significant role in calculating structural model for counteracting the action of fire.
The sustainable energy approach in the manufacture of cellular concrete
Authors: Kazaryan Ruben , Belyaev Konstantin
Published: April 2019

Cellular concrete holds one of the leading places in world practice of construction as a structural heat insulating material used in the construction and reconstruction of buildings and structures for various purposes. Excessive (reserve) porosity of cellular concrete provides its frost resistance (compensates expansion of water when freezing and the formed ice without destroying the material). Vapor permeability of cellular concrete provides fast removal of technological moisture from the material and the maintenance of normal moisture conditions in the rooms, and rather high air permeability contributes to the preservation of fresh air in the rooms. Thermal insulation and strength properties of cellular concrete allow erecting single-layer enclosing structures with the required thermal resistance from it. Cellular concretes are divided into aerated concrete and foam concrete, the operating, physical and mechanical parameters of which are almost the same with all other things being equal. According to the hydrothermal treatment method, cellular concrete is divided into two groups: autoclaved and non-autoclaved concrete (air hardening or steaming). The qualities of such concretes differ significantly, since autoclave treatment changes the mineralogical composition of concrete, which greatly affects the profitability of energy-related technological processes associated with the environment and ultimately forms the basis of environmental planning and management.
Operational characteristics of limestone and methods to increase its strength
Authors: Korneeva Elena , Sabri Mohanad Muayad Sabri , Babanina Anna , Zaytsev Egor , Poberezhskii Sergey
Published: April 2019

Since ancient times, limestone has been known as an inexpensive and reliable building material. The main problem of limestone materials in the construction of buildings is its reduced longevity due to various factors, such as wind and rain. These factors have a huge impact on the strength characteristics of the building material, so adherence to special recommendations is an important practical task. A review of literature on the problem of durability and the use of limestone is presented. With the help of experience, the strength of nummulite limestone is established. The analysis of the obtained data is made, as well as its comparison with the indices of other artificial and natural stones. The main methods of strengthening the structures made of limestone are considered at three different stages. Practical recommendations for minimizing the impact of negative factors on this material are given.
Water adsorption and freeze-thaw resistance of limestone treated with Oxal NK100
Authors: Korneeva Elena , Babanina Anna , Larionova Yulia
Published: April 2019

Natural limestone is subjected to negative impact of external factors, such as rain and low air temperature. One of the ways to improve the properties of limestone is considered in the paper, which is its treatment with Oxal NK100 compound. A review of the literature regarding the problem of durability and the use of limestone is presented. The water absorption and freeze-thaw resistance of the rock was determined experimentally before and after processing with a stone reinforcing compound. The analysis of the obtained data is conducted and conclusions about the effectiveness of the Oxal NK100 composition are drawn.
Features of hydraulic modes of low pressure gas networks
Authors: Zhila Viktor , Solovyeva Elena
Published: April 2019

In conditions of modern gas supply, the gas parameters are not constant. In this regard, gas appliances operate at different pressures. In operation, the change in the thermal load of the devices is due to fluctuations in the gas pressure in the city network. These oscillations are associated with the gas oscillations at the outlet from the gas regulating station. The main indicator of qualitative combustion of gas in appliances is the completeness of combustion, and this depends on maintaining the nominal pressure. The time during which the combustion process is completed consists of the time necessary for the formation of a gas-air mixture of stoichiometric composition, for heat the mixture to the ignition temperature, and of the time during which the combustible components of the gas react with oxygen.
Developing a strategy for the development of small enterprises in the energy sector of the economy
Authors: Alkhimovich Igor , Danilochkina Nadezhda , Dikareva Varvara , Dolgov Oleg
Published: April 2019

As a part of the study, the problems of forming the investment strategy of energy companies were considered. Possible ways of choosing the most rational forms of investment in the assets and a comprehensive assessment of the strategy’s effectiveness were proposed. A methodology for the qualitative and quantitative assessment of the investment strategy for the development of an enterprise has been developed by analyzing the Cobb-Douglas production function. In the paper, when solving specific problems, general economic methods of analysis, probabilistic and statistical methods, the method of expert assessments, and methods of system and comparative analysis were used. The practical application of the proposed assessment methodology is considered on the example of comparing two options for the investment strategy of an enterprise operating in the field of energy processing.
Already dependent: a dependency analysis of market activity on tin mining in Bangka Belitung
Authors: Ibrahim Ibrahim , Haryadi Dwi , Wahyudin Nanang
Published: April 2019

Tin in Bangka Belitung has been exploited since 17th century; however, local people have received the opportunity in mining only in the last two decades, when the tin was not set as a state’s strategic commodity. Therefore, since the last two decades, people economic activities in this area have dramatically increased. Nevertheless, it was not as long as two decades that tin had its glory. The tin price fluctuated along with its production. However, in turn, the market has already been dependent on tin mining. Through the qualitative study having survey motive, this paper traced the answer of the key question: “Is it true that Bangka Belitung economy is a tin economy?” This study was performed in a market area selling people’s primary and tertiary needs in all regions and municipalities of Bangka Belitung Islands Province. It concluded that market dependency on tin mining was extremely high. Market has had a direct impact on the price increase and decrease of tin mining and its production. It also inferred that at least the tin mining and trader were in the same condition in that they were very depended on tin commodity. This was a consequence of the motivation of the economy from which it was initially independent, and it was at this time that it became dependent, and it was difficult to get out of this dependence. This condition was called as already dependent.
The environmental control of urban planning in the Syrian desert cities
Authors: Alsous Muhammad Mahdy
Published: April 2019

Analysis the changes on the city’s image of the traditional desert communities and the principles of urban planning in their cities as a result of technical and environmental changes which achieved in the modern era. It was concluded, that It was necessary to research and emphasize the concept of urban sustainability in overcoming the development problems in these cities by maximizing and activating the role of desert cities, revealing their development potentials and the best way to exploit them. It was concluded defining planning principles for desert cities adapted to the harsh environment, by examining the impact of the environmental content on the planning concepts of the Syrian desert cities (Palmyra city as an example), defining principles and criteria for environmental control in the planning of these cities and evaluating the existing planning of the traditional communities in the Syrian desert and the degree of its interaction with the surrounding environment.
City planning parameters of public hearings project
Authors: Danilina Nina , Ivanova Zinaida , Slepnev Michail
Published: April 2019

Public hearings are one of the most important parts of urban management process that provide citizens involvement in development of urban territories. The article devotes to the question of evaluation of the Project that will be discussed on public hearings. Authors offer the method of evaluation of the sustainability of the Project in accordance with main principles of Sustainable urban design conception. The main aim is to make effective urban planning decision that will provide both interests of investors and citizens on the issue of realization of an urban project. The implementation of the developed method is directed on increasing the quality of urban environment, solving social conflict situations, and improving the urban management system.
Form and functional features of modular floating structures
Authors: Kizilova Svetlana
Published: April 2019

The article describes the main aspects of form and functional organization of modular architecture on the water. The leading approach to the study is based on the system analysis of the types of modular floating foundations, above-water structures of various configurations and their functions. As a result of the analysis of realized and conceptual projects, two types of modular bases were identified: simple, consisting of repeating geometric forms (square, rectangle, circle, hexagon), and complex. The main typologies of above-water structures are also highlighted: a pavilion, a low-rise and a high-rise building. The study examined the main programs that floating structures provide: residential, public and industrial. Characteristic features of the modular floating structures are drawn on the basis of the identified classifications. The article can be used for practical and conceptual research in the field of modular architecture and structures in the water environment.
Technical requirements for translucent structures of schools and kindergartens
Authors: Konstantinov Aleksandr , Romanerikova Elena , Borisova Margarita
Published: April 2019

The article presents some features of the translucent structures design of schools and kindergartens. The analysis of technical requirements for translucent structures of schools and kindergartens was represented. Based on a review of the typical composition of the premises of schools and kindergartens, it was found that different technical requirements should be established for translucent structures installed in rooms of various functional purposes and operating conditions. It was determined that the existing construction practice doesn’t take into account the differentiation of requirements for translucent structures of various premises of schools and kindergartens, and their design, as a rule, is taken to be the same for the entire construction objects. In future, it leads to disruption of the normal operation of the facility (especially in terms of ensuring normal temperature and humidity conditions and natural lighting of the premises). The features of the replacement of translucent structures in reconstructed schools and kindergartens were considered. It has been revealed that the use of modern types of translucent structures of standard construction (first of all, PVC window units) in the reconstruction leads to a significant decrease in the indicators of natural room lighting. Ways to solve this problem were given. Moreover, perspective directions for future research of the issue under consideration were considered.
Environmental planning and management of waterway construction (historical experience of Russia in the 18th century and the beginning of the 19th century)
Authors: Zolotareva Milena
Published: April 2019

An interdisciplinary analysis of an ecological system of waterway includes several related environmental science fields. Environmental planning and management is an important component in the construction of waterways. The aim of the study was to analyze the legislative framework that forms the vertical of construction management of water communications in Russia. Research in this field allows us to look at current problems through the prism of the historical process, political and socio-economic reforms of society. As a result of the study, the historical experience of the development of water communication in Russia was analyzed. The base of the research was constituted by legislative standards issued in Russia in the period under review. At the same time considering the development of the legislative framework and the actual construction process, it was found that the legislative system had a direct impact on the waterway building practice. This made it possible to determine the extent of the impact of changes in state institutions and their structural components on the overall organization of management and regulation of construction and on the practice of creating a system of waterways in Russia. These studies make it possible to systematize the historical experience of the development of functional, methodological, and organizational forms of regulating the construction of water communications in the period under review.
Reporting in the area of sustainable development in agribusiness
Authors: Klychova Guzaliya , Zakirova Alsou , Sadrieva Elvira , Avkhadiev Fayaz , Klychova Aigul
Published: April 2019

The aim of the present article is substantiation of theoretical provisions and development of practical recommendations for reporting in the field of sustainable development formation in compliance with the international standard “Guidelines for sustainability reporting” elaborated within the scope of Global Reporting Initiative. The research objectives are as follows: to study the content of non-financial reporting generated in compliance with the GRI guidelines and to offer new methodological approaches towards sustainability reporting formation. Using such general scientific methods as systematic approach, comparison, method of systematization and generalization of data, the research work revealed the essence, content, principles of formation and reporting structure in the field of sustainable development. The work contains recommendations on social activity of accounting organization with the use of information technology, such as: supplementary invoices application for accounting and development of forms for reports containing information of social character.