bluuebunny/crossref_metadata_2025 huggingface dataset:
Large-signal model of 2DFETs: compact modeling of terminal charges and intrinsic capacitances
Authors: Pasadas Francisco , Marin Enrique G. , Toral-Lopez Alejandro , Ruiz Francisco G. , Godoy Andrés , Park Saungeun , Akinwande Deji , Jiménez David
Published: December 2019

We present a physics-based circuit-compatible model for double-gated two-dimensional semiconductor-based field-effect transistors, which provides explicit expressions for the drain current, terminal charges, and intrinsic capacitances. The drain current model is based on the drift-diffusion mechanism for the carrier transport and considers Fermi–Dirac statistics coupled with an appropriate field-effect approach. The terminal charge and intrinsic capacitance models are calculated adopting a Ward–Dutton linear charge partition scheme that guarantees charge conservation. It has been implemented in Verilog-A to make it compatible with standard circuit simulators. In order to benchmark the proposed modeling framework we also present experimental DC and high-frequency measurements of a purposely fabricated monolayer MoS2-FET showing excellent agreement between the model and the experiment and thus demonstrating the capabilities of the combined approach to predict the performance of 2DFETs.
Big Data in Predictive Toxicology: Challenges, Opportunities and Perspectives
Authors: Richarz Andrea-Nicole
Published: December 2019

Predictive toxicology and model development rely heavily on data to draw upon and have historically suffered from the paucity of available and good quality datasets. The situation has now dramatically changed from a lack of data hampering model development to “data overload”. With high throughput/content screening methodologies being systematically used aiming to understand the mechanistic basis of adverse effects, and increasing use of omics technologies and consideration of (bio)monitoring data, the volume of data is continuously increasing. Big data in predictive toxicology may not have reached the dimension of other areas yet, such as real-time generated data in the health sector, but encompass similar characteristics and related challenges. Pertinent questions in this area are whether the new plethora of data are adequate for use in predictive toxicology and whether they address this area's most urgent problems. This overview chapter looks at the definition and characteristics of big data in the context of predictive toxicology as well as the challenges and opportunities big data present in this field.
An unprecedented planar π-conjugated [B2P5]5− group with ultra-large birefringence and nonlinearity: an ab initio study
Authors: Gong Pifu , Zhang Shengzi , Song Gaomin , Liu Xiaomeng , Lin Zheshuai
Published: December 2019

Introducing a planar π-conjugated [B2P5]5− group achieves enhanced birefringence and nonlinearity.
Accelerated DNAzyme-based fluorescent nanoprobe for highly sensitive microRNA detection in live cells
Authors: Wu Yanan , Meng Hong-Min , Chen Juan , Jiang Kemei , Yang Ran , Li Yingying , Zhang Ke , Qu Lingbo , Zhang Xiao-Bing , Li Zhaohui
Published: December 2019

An accelerated DNAzyme-based fluorescent nanoprobe was developed for rapid and highly sensitive detection of microRNA in live cells.
Iridium-catalyzed B–H insertion of sulfoxonium ylides and borane adducts: a versatile platform to α-boryl carbonyls
Authors: Zhang Shang-Shi , Xie Hui , Shu Bing , Che Tong , Wang Xiao-Tong , Peng Dongming , Yang Fan , Zhang Luyong
Published: December 2019

Iridium-catalyzed boron–hydrogen bond insertion reactions of trimethylamine-borane and sulfoxonium ylides have been demonstrated, furnishing α-boryl ketones in moderate to excellent yields in most cases (51 examples; up to 84%).
High-performance spinel NiMn2O4 microspheres self-assembled with nanosheets by microwave-assisted synthesis for supercapacitors
Authors: Sun Yin , Zhang Junjie , Sun Xiannian , Huang Naibao
Published: December 2019

Spinel NiMn2O4 microspheres self-assembled with nanosheets directly grown on a 3D nickel foam were successfully prepared by a facile microwave-assisted hydrothermal process.
Water dissociation and hydrogen evolution on the surface of Fe-based bulk metallic glasses
Authors: Sun Ping-Ping , Kripalani Devesh R. , Zhou Kun
Published: December 2019

Fe-Based bulk metallic glasses with a composition of Fe48Cr15Mo14C15B6Y2 can exhibit better catalytic capacity than the pristine Fe surface.
Ultrafast X-ray photoelectron diffraction in triatomic molecules by circularly polarized attosecond light pulses
Authors: Yuan Kai-Jun , Bandrauk André D.
Published: December 2019

We theoretically study ultrafast photoelectron diffraction in triatomic molecules with cyclic geometry by ultrafast circular soft X-ray attosecond pulses.
Photoelectrochemical OER activity by employing BiVO4 with manganese oxide co-catalysts
Authors: Kaur Manjodh , Chhetri Manjeet , Rao C. N. R.
Published: December 2019

Inspired by natural photosynthesis, various manganese oxides have been studied as co-catalysts with BiVO4 for photoelectrochemical water splitting.
Doping homogeneity in co-doped materials investigated at different length scales
Authors: Li Wenyu , Smet Philippe F. , Martin Lisa I. D. J. , Pritzel Christian , Schmedt auf der Günne Jörn
Published: December 2019

Doping homogeneity is important for the properties of co-doped phosphors, as it can affect the energy transfer between sensitizer and activator ions.
Probing the relevance of MoO2 nanoparticles’ synthesis on their catalytic activity by inelastic neutron scattering
Authors: D. Nunes Carla , Rudić Svemir , D. Vaz Pedro
Published: December 2019

Shelled and unshelled MoO2 nanoparticles were synthesized by different protocols yielding dramatic changes in catalytic performance. Inelastic neutron scattering was a valuable tool in probing surface species that were responsible for those changes.
Sharpening upconversion nanoparticles to reduce surface quenching
Authors: Zhu Jingyi , Zhao Pingping , Yang Junxing , Shi Jianhui , Chu Jianlin , Miao Wenjun , Zhao Yili , Zhou Benqing
Published: December 2019

Sharpening the surfaces of nanocrystals could significantly reduce the number of surface quenchers and improve the luminescence intensity.
Ultra-simple wearable local sweat volume monitoring patch based on swellable hydrogels
Authors: Zhao F. J. , Bonmarin M. , Chen Z. C. , Larson M. , Fay D. , Runnoe D. , Heikenfeld J.
Published: December 2019

Presented is an ultra-simple wearable local sweat volume monitoring patch based on swellable hydrogels.
Transparent, mechanically robust, and ultrastable ionogels enabled by hydrogen bonding between elastomers and ionic liquids
Authors: Cao Ziquan , Liu Hongliang , Jiang Lei
Published: December 2019

A general strategy for the fabrication of mechanically robust ionogels by hydrogen bonding between elastomers and [NTf2]-based ILs is demonstrated.
The non-stationary case of the Maxwell-Garnett theory: growth of nanomaterials (2D gold flakes) in solution
Authors: Natarajan Prakash , Shalabny Awad , Sadhujan Sumesh , Idilbi Ahmad , Bashouti Muhammad Y.
Published: December 2019

We followed the growth of the gold flakes by the optical spectra. The optical spectra were deconvoluted based on non-stationary case of Maxwell-Garnett. Two regimes were resolved: 0–90 min which driven by the oxidation process and from 90–180 min which driven by thermal process.
Potassium promoted core–shell-structured FeK@SiO2-GC catalysts used for Fischer–Tropsch synthesis to olefins without further reduction
Authors: Ni Zhijiang , Zhang Xuefei , Bai Jirong , Wang Zhilei , Li Xi , Zhang Yanhu
Published: December 2019

The GC and K promoted Fe-based catalysts prepared by modified sol–gel method, which omits the complex and high energy consumption reduction process, can be used directly for highly efficient FTS and thus will be more promising in the future.
Tetrahedral photoluminescent manganese(ii) halide complexes with 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide as a ligand
Authors: Bortoluzzi Marco , Castro Jesús , Gobbo Alberto , Ferraro Valentina , Pietrobon Luca , Antoniutti Stefano
Published: December 2019

Photoluminescent Mn(ii) tetrahedral complexes characterized by intense emission in the green region were isolated from the reaction of MnX2 (X = Cl, Br, I) and the ligand 1,3-dimethyl-2-phenyl-1,3-diazaphospholidine-2-oxide.
Efficient blue, green and red iridium(iii) complexes with noncovalently-linked pyrazole/pyrazolide rings for organic light-emitting diodes
Authors: Lu Jun-Jian , Liang Xiao , Luo Xu-Feng , Wu Zheng-Guang , Zheng You-Xuan
Published: December 2019

Blue, green and red iridium(iii) complexes using a new pyrazole/pyrazolide ancillary ligand system, and their application in OLEDs with EQEs of up to 21.0% and low efficiency roll-off.
Hybrid shells of N-doped carbon encapsulated by MnO nanoparticles as oxygen reduction reaction electrocatalysts
Authors: Li Yanan , Han Jie , Xu Zhilong , Guo Rong
Published: December 2019

Recently, the development of non-precious metal electrocatalysts for effective oxygen reduction reaction (ORR) has become a research hotspot.
Correction: Dopamine-melanin nanoparticles scavenge reactive oxygen and nitrogen species and activate autophagy for osteoarthritis therapy
Authors: Zhong Gang , Yang Xueyuan , Jiang Xianfang , Kumar Anil , Long Huiping , Xie Jin , Zheng Li , Zhao Jinmin
Published: December 2019

Correction for ‘Dopamine-melanin nanoparticles scavenge reactive oxygen and nitrogen species and activate autophagy for osteoarthritis therapy’ by Gang Zhong et al., Nanoscale, 2019, 11, 11605–11616.
Effect ofn-alkyl substitution on Cu(ii)-selective chemosensing of rhodamine B derivatives
Authors: Mishra Santosh Kumar , Dehuri Suryakanta , Bag Bamaprasad
Published: December 2019

Substitution withn-alkyl chains of different lengths (Cn> 7) at the N-terminus of rhodamine hydrazide probes led to variation in associated parameters in their Cu(ii)-selective chemosensing.
Diversity-oriented approach to functional thiophene dyes by Suzuki coupling-lithiation one-pot sequences
Authors: May Lars , Daniel Sven , Müller Thomas J. J.
Published: December 2019

Functional thiophenes, e.g. for organic metal-free dye sensitized solar cells (DSSC), are accessible efficiently via a divergent and diversity-oriented synthetic strategy.
Potassium 2-methoxy-4-vinylphenolate: a novel hit exhibiting quorum-sensing inhibition inPseudomonas aeruginosa viaLasIR/RhlIR circuitry
Authors: Shah Mayank D. , Kharkar Prashant S. , Sahu Niteshkumar U. , Peerzada Zoya , Desai Krutika B.
Published: December 2019

Effect of potassium 2-methoxy-4-vinylphenolate on quorum sensing inPseudomonas aeruginosa.
In situ deposition of MOF199 onto hierarchical structures of bamboo and wood and their antibacterial properties
Authors: Su Minglei , Zhang Rong , Li Huairui , Jin Xiaobei , Li Jingpeng , Yue Xianfeng , Qin Daochun
Published: December 2019

MOF199 is deposited on moso bamboo and balsa wood under mild conditions. A uniform and dense MOF199 layer with perfect crystal morphology was successfully obtained on the hierarchical surface of both bamboo and wood.
Discovery of a novel small molecular peptide that disrupts helix 34 of bacterial ribosomal RNA
Authors: GC Keshav , To Davidnhan , Jayalath Kumudie , Abeysirigunawardena Sanjaya
Published: December 2019

Discovery of a novel heptapeptide that disrupts RNA–RNA and RNA–protein interactions in bacterial ribosome.
A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd2+ ions
Authors: Wang Fei , Hao Ming , Liang Jinsheng , Gao Peizhang , Zhu Maomao , Fang Baizeng , Zhang Hui , Shang Zengyao
Published: December 2019

In this work, sepiolite mineral nanofibers are facilely prepared by a microwave-hydrogen peroxide method, and the bulk densities of the samples are adopted to evaluate the defibering effect.
Aggregation tailored emission of a benzothiazole based derivative: photostable turn on bioimaging
Authors: Kaur Ishpreet , Sharma Vinay , Mobin Shaikh M. , Khajuria Anjali , Ohri Puja , Kaur Paramjit , Singh Kamaljit
Published: December 2019

A molecular probe is reported that aggregates in a solvent mixture which exhibits emission and has excellent potential for cell and plant tissue imaging.
Selective recognition of human telomeric G-quadruplex with designed peptide via hydrogen bonding followed by base stacking interactions
Authors: Tyagi Shikhar , Saxena Sarika , Kundu Nikita , Sharma Taniya , Chakraborty Amlan , Kaur Sarvpreet , Miyoshi Daisuke , Shankaraswamy Jadala
Published: December 2019

A new synthetic peptide is presented. A Glu residue binds through H-bonding to a guanine-base and a Trp residue intercalates with K+ resulting in stabilization of a human telomeric G-quadruplex with high selectivity over a complementary c-rich strand and double-stranded DNA.
Preparation and electroactive phase adjustment of Ag-doped poly(vinylidene fluoride) (PVDF) films
Authors: Kim Seung-Hyun , Park So-Jeong , Cho Chang-Yeol , Kang Hong Suk , Sohn Eun-Ho , Park In Jun , Ha Jong-Wook , Lee Sang Goo
Published: December 2019

The ratio of γ- and β-phases of Ag-doped poly(vinylidene fluoride) films was controlled by removing Ag+ using a washing process.
Synthesis of pyrrolo[3′,2′:4,5][1,3]diazepino[2,1,7-cd]pyrrolizine derivatives from dicyanovinylene-bis(meso-aryl)dipyrrin
Authors: Shin Ji-Young
Published: December 2019

Pyrrolo[3′,2′:4,5][1,3]diazepino[2,1,7-cd]pyrrolizine derivatives 2 and 3 were synthesized from dicyasnovinylene-bis(meso-aryl)dipyrrin in the presence of BF3·OEt2 or InBr3. The structures were elucidated by X-ray crystallography.
Preparation of a mimetic and degradable poly(ethylene glycol) by a non-eutectic mixture of organocatalysts (NEMO) via a one-pot two-step process
Authors: Moins S. , Loyer P. , Odent J. , Coulembier O.
Published: December 2019

A one-pot, two-step method for the preparation of degradable PEG is here presented.
Table-salt enabled interface-confined synthesis of covalent organic framework (COF) nanosheets
Authors: Shi Xiansong , Ma Dongwei , Xu Fang , Zhang Zhe , Wang Yong
Published: December 2019

We present an exfoliation-free and scalable strategy to prepare few-layered CONs by the interface-confined synthesis. The resultant CONs are assembled into selective layers for molecular separations.
A side-chain engineering strategy for constructing fluorescent dyes with direct and ultrafast self-delivery to living cells
Authors: Guo Lifang , Li Chuanya , Shang Hai , Zhang Ruoyao , Li Xuechen , Lu Qing , Cheng Xiao , Liu Zhiqiang , Sun Jing Zhi , Yu Xiaoqiang
Published: December 2019

A side-chain engineering strategy can dramatically improve dye delivery by fine-tuning the adsorption and desorption abilities of the transmembrane process, enabling ultralow loading bioimaging and deep tissue penetration.
Practical challenges in the development of photoelectrochemical solar fuels production
Authors: Spitler Mark T. , Modestino Miguel A. , Deutsch Todd G. , Xiang Chengxiang X. , Durrant James R. , Esposito Daniel V. , Haussener Sophia , Maldonado Stephen , Sharp Ian D. , Parkinson Bruce A. , Ginley David S. , Houle Frances A. , Hannappel Thomas , Neale Nathan R. , Nocera Daniel G. , McIntyre Paul C.
Published: December 2019

Analyses are made of the connectivity of PEC fuels market place, prototype and materials to create an efficient research focus.
An environmentally friendly natural polymer as a universal interfacial modifier for fullerene and non-fullerene polymer solar cells
Authors: Wang Xiaojing , Yi Shuwang , He Zhicai , Ouyang Xinhua , Wu Hong-Bin , Zhu Weiguo , Zhang Bin , Cao Yong
Published: December 2019

Green fabrication, including green materials and green solvents, is an attractive technique in organic electronics.
Application technique for model‐based approach to estimate fault location
Authors: Navalpakkam Ananthan Sundaravaradan , Santoso Surya
Published: December 2019

Impedance‐based algorithms commonly used for determining the fault location in transmission lines are prone to several sources of error and are specific to the line and system configuration. Furthermore, these algorithms do not utilise available valuable information about the power system surrounding the faulted line. These issues can be overcome using a model‐based fault location (MBFL) approach. It uses a circuit model to simulate possible fault scenarios and compares the simulated fault currents with the measured currents recorded by the relay to identify the fault location. However, there are several difficulties and limitations while applying MBFL. There is a loss in accuracy and precision based on the number of simulated scenarios and a requirement to store voluminous simulation results. Hence, this study presents a novel application technique for implementing model‐based approach efficiently to estimate the fault location and fault resistance using artificial neural networks‐based approach. A key highlight of the proposed approach is the ability to identify the location of a fault present on neighbouring lines using the measured through fault current. The study also presents representative scenarios to demonstrate the capability and potential of the proposed approach.
Optimal performance of a self‐healing microgrid
Authors: Chandak Sheetal , Rout Pravat Kumar
Published: December 2019

This study proposes a multi‐objective binary differential evolution algorithm to reconfigure the system and restore the loads within the stand‐alone microgrid. The approach aims to attain a restoration path having maximum power flow with the minimum number of interrupted loads and switching operations. To execute the discrete optimisation strategy, the power network has been reframed as a capacitated graph, where the edges are capacitated by the loading capacity of the feeder. The strategy implements the maximum power flow theorem, which has been enhanced using the centrality index. The major operational constraints of the microgrid have been strictly followed to maintain system stability. The proposed restoration algorithm is examined on an islanded 13‐bus microgrid system with the two test scenarios of irregular power generation, and the fault instance is isolating a healthy section of a microgrid. Moreover, the efficacy of the proposed approach has been further examined on a 39‐bus system, and the results are compared with the other optimisation strategies implemented for restoration.
Fault diagnosis of rolling bearing based on kurtosis criterion VMD and modulo square threshold
Authors: Zhang Xueying , Luan Zhongquan , Liu Xiuli
Published: December 2019

Aiming at the problem that fault signals of rolling bearing are easily submerged by the strong background noise, which makes it difficult to extract fault information, so a method based on kurtosis criterion variational mode decomposition (VMD) and modulo square threshold is proposed and applied to fault diagnosis of rolling bearing. First, the vibration signals of rolling bearing are processed by VMD. Second, the signals are reconstructed by selecting the intrinsic mode function (IMF) components with the largest kurtosis and the second largest kurtosis. Finally, the reconstruction signals are de‐noised by the modulo square threshold. Through the test of the inner ring and outer ring of the rolling bearing, the feasibility and effectiveness of the proposed method are verified.
Rolling bearing fault diagnosis based on EEMD sample entropy and PNN
Authors: Liu Xiuli , Zhang Xueying , Luan Zhongquan , Xu Xiaoli
Published: December 2019

A fault diagnosis method for rolling bearing based on ensemble empirical mode decomposition (EEMD) sample entropy and probabilistic neural network (PNN) is proposed for non‐steady and non‐linear signals. First, the rolling bearing signals are decomposed into intrinsic mode function (IMF) using EEMD. Then, the kurtosis of each component is calculated. Five components with large kurtosis are selected and the sample entropy is extracted to form the feature vectors. Finally, the feature vectors are input to the PNN for fault diagnosis. The method is used to classify the type of the rolling bearing fault. The results show that the accuracy of fault diagnosis of the proposed method is 100%, which proves the effectiveness of the proposed method.
Study on decoupling control method of vehicle wheel bridge simulation loading system
Authors: Xu Zhuo , Nie Yahui
Published: December 2019

There are mechanical coupling interference and hydraulic coupling interference in the vehicle wheel bridge simulation loading system based on secondary regulation, which can cause the control accuracy of the system to decrease obviously and seriously affect the control performance of the system. In order to eliminate the coupling interference between systems, two decoupling methods are proposed, one way to do this is to join the decoupling element, and the other is to join the robust compensator. The simulation results show that the decoupling control of decoupling element has a good decoupling effect on mechanical coupling, but it has no effect on hydraulic coupling. Robust decoupling control has a good decoupling effect on mechanical coupling and hydraulic coupling.
Establishment of ISO 4037‐1 X‐ray narrow‐spectrum series
Authors: Zhang Deliang , Lai Wanchang , Wu Jinjie , Du Haiyan , Zhao Rui , Fan Song
Published: December 2019

In order to calibrate radiation protection instruments and determine radiation dose, it is critical to establish an X‐ray narrow‐spectrum series recommended by the standard ISO 4037‐1 which is published by the International Standardisation Organisation (ISO). By experiment, the qualities of filtered X radiation of narrow‐spectrum series in the range from 60 to 300 kV were established. The differences of the first half‐value layer (HVL1) and the second HVL (HVL2) between experimental results and the values given in the standard ISO 4037‐1 were all within 5%. What is more, the Monte Carlo code EGSnrc was used to simulate the spectra of these radiation qualities, which showed a good agreement with these spectra given in the standard ISO 4037‐1. The spectral resolution, mean energy and effective energy of these reference qualities can be obtained, which are all have good agreement with the given values.
The Forgotten Quadrant Survey
Authors: Benedettini M. , Molinari S. , Baldeschi A. , Beltrán M. T. , Brand J. , Cesaroni R. , Elia D. , Fontani F. , Merello M. , Olmi L. , Pezzuto S. , Rygl K. L. J. , Schisano E. , Testi L. , Traficante A.
Published: December 2019

Aims. We present the Forgotten Quadrant Survey (FQS), an ESO large project that used the 12 m antenna of the Arizona Radio Observatory to map the Galactic plane in the range 220° < l <  240° and −2.°5 <  b <  0°, both in 12CO (1–0) and 13CO (1–0), at a spectral resolution of 0.65 km s−1 and 0.26 km s−1.

Methods. We used the (1–0) transition of carbon monoxide to trace the molecular component of the interstellar medium. Our data set allows us to easily identify how the molecular dense gas is organised at different spatial scales: from the giant clouds with their denser filamentary networks, down to the clumps and cores that host the new-born stars and to obtain reliable estimates of their key physical parameters such as size and mass.

Results. We present the first release of the data of the FQS survey and discuss their quality. Spectra with 0.65 km s−1 velocity channels have noise ranging from 0.8 K to 1.3 K for 12CO (1–0) and from 0.3 K to 0.6 K for 13CO (1–0). In this first paper, we used the 12CO (1–0) spectral cubes to produce a catalogue of 263 molecular clouds. The clouds are grouped in three main structures corresponding to the Local, Perseus, and Outer arms up to a distance of ∼8.6 kpc from the Sun. This is the first self-consistent statistical catalogue of molecular clouds of the outer Galaxy obtained with a subarcminute spatial resolution and therefore able to detect not only the classical giant molecular clouds, but also the small clouds and to resolve the cloud structure at the sub-parsec scale up to a distance of a few kiloparsec. We found two classes of objects: structures with sizes above a few parsecs that are typical molecular clouds and may be self-gravitating, and subparsec structures that cannot be in gravitational equilibrium and are likely transient or confined by external pressure. We used the ratio between the Herschel H2 column density and the integrated intensity of the CO lines to calculate the CO conversion factor and we found mean values of (3.3 ± 1.4) × 1020 cm−2 (K km s−1)−1 and (1.2 ± 0.4) × 1021 cm−2 (K km s−1)−1, for 12CO (1–0) and 13CO (1–0), respectively.

Conclusions. The FQS contributes to the general effort in producing a new generation of high-quality spectroscopic data for the Galactic plane in the less-studied third Galactic quadrant toward the outer Galaxy. The FQS has produced a data set of great legacy value, largely improving the data quality both in terms of sensitivity and spatial resolution over previous data sets.
Slowly rotating Bose–Einstein condensate compared with the rotation curves of 12 dwarf galaxies
Authors: Kun E. , Keresztes Z. , Gergely L. Á.
Published: December 2019

Context.The high plateaus of the rotation curves of spiral galaxies suggest either that there is a dark component or that the Newtonian gravity requires modifications on galactic scales to explain the observations. We assemble a database of 12 dwarf galaxies, for which optical (R-band) and near-infrared (3.6 μm) surface brightness density together with spectroscopic rotation curve data are available, in order to test the slowly rotating Bose–Einstein condensate (BEC) dark matter model.

Aims.We aim to establish the angular velocity range compatible with observations, bounded from above by the requirement of finite-size halos, to check the model fits with the dataset, and the universality of the BEC halo parameter ℛ.

Methods.We constructed the spatial luminosity density of the stellar component of the dwarf galaxies based on their 3.6 μm andR-band surface brightness profiles, assuming an axisymmetric baryonic mass distribution with arbitrary axis ratio. We built up the gaseous component of the mass by employing an inside-truncated disk model. We fitted a baryonic plus dark matter combined model, parametrized by theM/Lratios of the baryonic components and parameters of the slowly rotating BEC (the central densityρc, size of the BEC halo ℛ in the static limit, angular velocityω) to the rotation curve data.

Results.The 3.6 μm surface brightness of six galaxies indicates the presence of a bulge and a disk component. The shape of the 3.6 μm andR-band spatial mass density profiles being similar is consistent with the stellar mass of the galaxies emerging wavelength-independent. The slowly rotating BEC model fits the rotation curve of 11 galaxies out of 12 within the 1σsignificance level, with the average of ℛ as 7.51 kpc and standard deviation of 2.96 kpc. This represents an improvement over the static BEC model fits, also discussed. For the 11 best-fitting galaxies the angular velocities allowing for a finite-size slowly rotating BEC halo are less then 2.2 × 10−16s−1.For a scattering length of the BEC particle ofa ≈ 106fm, as allowed by terrestrial laboratory experiments, the mass of the BEC particle is slightly better constrained than in the static case asm ∈ [1.26 × 10−17 ÷ 3.08 × 10−17] (eV c−2).
3D numerical simulations of oscillations in solar prominences
Authors: Adrover-González A. , Terradas J.
Published: December 2019

Context. Oscillations in solar prominences are a frequent phenomenon, and they have been the subject of many studies. A full understanding of the mechanisms that drive them and their attenuation has not been reached yet, however.

Aims. We numerically investigate the periodicity and damping of transverse and longitudinal oscillations in a 3D model of a curtain-shaped prominence.

Methods. We carried out a set of numerical simulations of vertical, transverse and longitudinal oscillations with the high-order finite-difference Pencil Code. We solved the ideal magnetohydrodynamic equations for a wide range of parameters, including the width (wx) and density (ρp0) of the prominence, and the magnetic field strength (B) of the solar corona. We studied the periodicity and attenuation of the induced oscillations.

Results. We found that longitudinal oscillations can be fit with the pendulum model, whose restoring force is the field-aligned component of gravity, but other mechanisms such as pressure gradients may contribute to the movement. On the other hand, transverse oscillations are subject to magnetic forces. The analysis of the parametric survey shows, in agreement with observational studies, that the oscillation period (P) increases with the prominence width. For transverse oscillations we obtained that P increases with density and decreases with B. For longitudinal oscillations we also found that P increases with ρp0, but there are no variations with B. The attenuation of transverse oscillations was investigated by analysing the velocity distribution and computing the Alfvén continuum modes. We conclude that resonant absorption is the mean cause. Damping of longitudinal oscillations is due to some kind of shear numerical viscosity.

Conclusions. Our model is a good approximation of a prominence body that nearly reproduces the observed oscillations. However, more realistic simulations that include other terms such as non-adiabatic processes or partially ionised plasmas are necessary to obtain better results.
Physical modeling of pipeline resonance in civil buildings
Authors: Yurchenko Elena , Makarov Konstantin , Kakosian Astkhik , Biryukbaev Eric
Published: December 2019

The method of experimental determination of the magnitudes of pipelines resonant vibrations on small-sized physical models of 1:10 of actual size is shown. The measured values of the oscillation frequencies of pipe models with hinged and pinched supports on both sides are compared with their mathematical counterparts. Fluctuations of pipes with clogging allow us to determine its effect on the values of the resonant frequencies. The obtained results are essential for predicting accidents and fatigue failures of pipelines for various purposes. During the tests on steel models, the excited harmonic sound oscillations of the models are captured by an electromagnetic transducer and transmitted through a microphone amplifier to a computer that serves as an oscilloscope.
Prospective of Provision of Dairy Products for the Population of Ukraine
Authors: Slobodianyk Anna , Abuselidze George
Published: December 2019

The article covers the general theoretical regulations of supply of the population of Ukraine with the dairy products. The authors emphasize the matters of supply of material and technical recourses, achievement of just relations in supply system upon transfer of ownership along the walkway of raw materials and further of the ready product to customer. Purposefulness of application of the model of supply of the population of Ukraine with the dairy products developed by the authors is proved. The essence of this model consists in the closed cycle: production – sale - incomes – recourses market (and land market) – consumption – export – import – employment level – production. We reasoned direct relation of reduction of livestock population to rise of food price, when in the chain of production, processing and trade the incomes aggregate in the last stages of the chain and the initial goods producers sustain losses. The authors come to conclusion that creation of family farms will be successful providing that they integrate into cooperatives maintaining the closed cycle of production, processing and sale of ready products and as a result, the structural improvements will cause increase of profits and rise of employment of rural population.
Optimal structural synthesis of agricultural legged robot with minimal damage on soil
Authors: Ibrayev Sayat , Jamalov Nutpulla , Ibrayeva Arman , Mukhambetkaliyeva Gaukhar
Published: December 2019

Optimal structural synthesis of agricultural legged robot is carried out, that causes minimal damage on soil and provide the most favorable conditions for plant growth. A rational structure of a legged robot with orthogonal propel based on kinematic decoupling of the motion is proposed. Most of traditionally used walking robots have universal “insect type” structure with multiple actuators to be synchronized which result in complex control. The alternative design is realizing a concept of functional independence of the actuators when each actuator is responsible for specified purpose: the main actuators are responsible for rectilinear translational motion of cabine/chassis whereas another group of actuators are responsible for adaptation purposes and anothers participate in turning/maneuvering. This allows to carry out the cabine/hull shifting and turning with a minimum number of actuators and simplified control. A new kinematic equivalent scheme of turning mechanism was proposed in order to optimize turning modes of the robot. The proposed planar model allows to determine the optimal parameters of the robot by applying multicriteria synthesis methods of parallel robot manipulators based on isotropy, maneuverability and other criteria.
The development of the district heat supply system of the city of Karaganda
Authors: Agilbayeva Mereke , Kalinin Alexey
Published: December 2019

The district heating system of Karaganda (Kazakhstan) is considered in the article. The characteristics of the existing cogenerators and the state of the pipeline networks are given. Given the analysis of the existing state of the entire district heating of Karaganda. Proposed the program for the integrated development of the heat supply system bringing world experience in implementing the main development and modernization of heating networks. Shown the experience of reconstruction of heat supply facilities in the city of Karaganda within the framework of the state loan program “Nurly Zhol”. Based on the statistical data on the development of the city of Karaganda and its heat supply system the predicted heat loads are given until 2030. Due to the shortage of available heat capacity, options for the development of a centralized heat supply system in Karaganda are given and analyzed.
Physical features of reducing air pollution for the operating conditions of the drying drum of brick factories
Authors: Bespalov Vadim , Turk Gennadiy , Gurova Oksana
Published: December 2019

The article is devoted to the study of the process of reducing air pollution in relation to the operating conditions of the drying drum of brick factories. The objectives of the work were to study and identify the physical characteristics of the process of reducing air pollution for the operating conditions of the drying drum of brick factories, for its subsequent effective implementation with the help of engineering systems. A block diagram is suggested of the physical model of the process of reducing air pollution for the considered production and technological conditions, revealing the relationship of a set of consistently and purposefully implemented stages of the cycle of dusting, using physical and energy concept as the theoretical basis. As a result of the study of the process of reducing air pollution, in relation to the operating conditions of the drying drum of brick factories operation, based on the analysis of possible solutions of the problem of dusting, physical features of the process of reducing air pollution for these production and technological conditions were identified for its subsequent effective implementation by means of engineering systems.
Ecological – hygienic soil assessment of the federal highway roadside areas
Authors: Martsev Anton , Selivanov Oleg
Published: December 2019

Over a half (about 54 %) of all types of anthropogenic pollution belongs to transport. Soils at roadside areas experience active pollution with heavy metals, which are the most hazardous contaminants penetrating into the soil with the exhaust gases due to the increased traffic intensity of vehicles. Hygienic assessment of heavy metals content in the roadside area soils of the Federal highway “R-22” with a total length of 798 km has been carried out in this research. The results based on soil sampling at 11 points along the entire length of the highway at the distance of 20 and 50 m from the roadbed have been assessed. Soil sampling was done in compliance with the State Standard of GOST 17.4.4.02-2017 by the envelope method from the soil horizon at the depth of 0-20 cm. HM content in soil samples was determined by the X-ray fluorescence method applying spectrometer “Spectroscan MAX-G” in compliance with the Environmental State Standards PND F 16.1.42-04. The greatest HM content was detected in the roadside area located on the black soils of spodzol, typical, southern, dark chestnut and chestnut saline soils. It testifies of the considerable soil contamination by the passing vehicles and of a real ecological harm to public health and environment. In order to reveal harmful contaminants for the population living at the roadside areas, it is recommended to organize sanitary and hygienic monitoring of soil, surface and groundwater of the roadside areas which are subject to constant HM exposure and accumulation exceeding maximum permissible concentrations (MPC) and approximate permissible amounts (APA) set by sanitary and hygienic standards.
Assessment of local technogenic hazards of the industrial zone
Authors: Denisov Oleg , Ponomarev Alex , Ponomareva Irina , Stadnik Viktoria
Published: December 2019

The article deals with the issues of employee safety under the influence of local man-made hazards. The example of the welding process is used to calculate the risk of work in a confined space. The issues of application of protective means for prevention of violations of health of the worker are discussed.The situation of emergency shutdown of ventilation during the work of personnel in difficult conditions was simulated. When calculating the probability of risk occurrence in the simulated situation, toxic effects of nitrogen dioxide on the health were established for the options of absence and presence of protection (mask).
Monitoring of priorii information at complex product failure of single use in the process of its creation
Authors: Tsarev Yuri
Published: December 2019

A variant of the parametric representation of a single use complex product in the process of its creation during testing is described, when structural failures of the product or its component parts according to one or more parameters specified in the technical specification, requires the implementation of modifications is required, leading to changes in general set and repetition trials, however, it is possible to reduce the volume of tests by taking into account a priorii information. This is especially true, while ensuring the reliability of complex space products of single use, the components of which pass the first stages of ground tests, and then as part of complex space products the stages of flight tests. The structural failure of any component of a space product during ground testing must not have the effect of occurring during flight tests as if it had been part of the product. Meanwhile, the completion of the component element of a singleuse product, the structural failure of which occurred at the stage of flight tests in the product, and the evaluation of its effectiveness, can be carried out at the stage of ground tests, in the case of a complex product consideration in parametric form. It can significantly reduce the cost of flight testing of a complex product, in the case of the product composite element effective refinement at the stage of ground testing, without a significant (temporary) reduction in the overall reliability of a single use complex product.
A comparative analysis of precision seed planters
Authors: Sharaby Noureldin , Doroshenko Artyom , Butovchenko Andrey , Legkonogih Aleksandr
Published: December 2019

Crops play a vital role in our daily life, as they represent the backbone of all life on earth and an essential resource for human food, feed grain, oil, and fiber for local consumption and a major component of export trade in many countries, leading to its increasing demand all over the world. Precision planting is the effective method to rise crop yield. To meet the agricultural requirement of precision planting, various types of different precision seed planters have been developed. However, because of the difference of farm scale, geographical environment, crop type and economic status among different countries, types of seed planters are various, and the technique involved are at different levels. This paper analysis and compare of some typically precision seed planters currently available in the world. Detailed characteristics have been provided for some typical precision planters and comparisons were made as to their suitability under working conditions. This allows the smallholder farmers to assess and select the appropriate precision seed planter that corresponds to the potential and characteristics required, for example, planting seeds, the possibility of adding fertilizer during cropping, the number of rows and the horsepower required, controlling the seeds rate, spacing between seeds in the same rows in addition to more other options.
Local treatment of burn wounds in animals using a new nanocomponent ointment
Authors: Fedota Natalia , Gorchakov Eduard , Bagamaev Bagama , Kireev Ivan , Shahova Valeriya , Kolodkin Vladimir
Published: December 2019

We have developed an ointment preparation consisting of silver and zinc oxide nanoparticles, which form the basis of the nanocomposition. This drug can reduce the healing time of the wound surface due to the inclusion of nanodispersed particles in the composition. Application of nanoparticles allows to reduce inflammatory process, to carry out disinfecting treatment of a wound surface from pathogenic microorganisms, and accordingly to create optimum conditions for reparative process. Nanocomposite preparation has many advantages over existing analogues without irritating and allergic effects. Due to the high adsorption capacity, it allows to accelerate the healing process of the damaged surface of the skin. Initial studies were conducted on laboratory rats at the age of 6 months with a close mass that was up to 250 g in accordance with international requirements for the use of laboratory animals. As a result of the experiment, a new ointment preparation based on silver and zinc oxide nanoparticles, which are active components of the nanocomposition, was obtained. The use of these components allowed to accelerate the process of reparative restoration of the skin with full recovery of the studied animals. As shown by the experience, the recovery rate on average accelerated by seven days, compared with similar drugs available on the pharmaceutical market.
Using factor analysis in beef cattle breeding
Authors: Zelenkov Alexey , Ermakov Alexey , Zelenkova Galina , Gorlov Ivan , Pakhomov Alexander , Tresnitskii Sergei , Derezina Tatyana
Published: December 2019

Studies of the structure of the interaction of signs with the help of factor analysis is based on the idea of the complex nature of the phenomenon being studied, expressed in the interdependence of individual signs, determined by “internal” hidden causes, forming the specifics of a property, quality. We used the factor analysis method to study the producers’ assessments of the quality of the offspring and to test their bullsons for their own productivity of the Kalmyk and Hereford cattle breeds. The analysis included material from the work of pedigree reproducers and plants in the Kalmyk and Hereford breeds of the Rostov Region. The total number of animals included in the treatment was 96 manufacturing bulls and 272 sons bulls. As a result of the studies, the proposed breeding indices on one basis are quite suitable for the preliminary selection of bullcalves in commodity farms or in pedigree farmers for breeding beef cattle. In order to get a final assessment, we compiled new breeding indices, including two (live weight at 8 and 15 months, live weight at 15 months and average daily gain from 8 to 15 months), as well as three characteristics (live weight in 8, 15 months and average daily gain). These signs are objective, easy to account. According to the estimates obtained for individual bull-sons, it is possible by summing up the values of new factors to identify the bulls’ assessment of the quality of the offspring. Analysis of assessment materials is characterized by high reliability (P > 0.999).
The development of a strategy for improving low-power gas turbine engines
Authors: Ivanov Igor
Published: December 2019

This article presents the author’s method of developing an original design solution for low-power gas turbine engines based on the TIPS-FCA system obtaining a patent for a method and a device.
Innovative approach to evaluating the correlation between the distribution of the concentration of enzymes in the blood serum and heart tissues of rats
Authors: Boriskin Pavel , Gulenko Olga , Deviatkin Anatoliy , Leonov Victor , Pavlova Olga
Published: December 2019

Cardiovascular diseases (CVDs) have been the leading cause of death worldwide for many years. In recent years, new CVD markers have been sought that can improve the diagnosis and treatment of this broad and predictably unfavorable group of diseases. The efforts of many researchers are aimed at identifying changes in the level of enzymes in the lipid peroxidation system as possible mechanisms underlying the development of CVDs. The imbalance between the intensification of free-radical oxidation caused by active oxygen forms and the activity of the body’s protective antioxidant system leads to serious disturbances: disorganization of cellular structures, changes in their functional activity. The article presents the study of the interrelations between the concentration distribution of POL-AO enzymes in blood serum and heart tissues of white non-pedigree rats. The correlation coefficients of Spearman, the gamma of correlation and Kendel Tau revealed a reliable presence of weak correlation between the concentration of glutathione peroxidase in blood serum and heart tissues (Spearman R = 0.18 at p < 0.029408, Gamma = 0.14 at p < 0.018701; Kendall Tau = 0.13 at p < 0.018701).
Assessment of grain losses during harvesting of grain crops on the basis of technical and economic indicators
Authors: Khozyaev Igor , Ladyanov Vyacheslav , Enalyeva Larisa , Balinskaya Maria , Zharov Viktor
Published: December 2019

The article presents a method for determining the optimal losses of grain during combine harvesting (direct and with the selection of rolls). Based on the quoted operating costs. It is shown that there is no need to limit the losses from mechanical damage to the grain. But their level should not exceed 2.2%. Under these conditions, the cleaning period should be no more than 14 days and there will be a reduction in the reduced costs by 0.3%.