bluuebunny/crossref_metadata_2025 huggingface dataset:
Long-term hippocampal interneuronopathy drives sex-dimorphic spatial memory impairment induced by prenatal THC exposure
Authors: de Salas-Quiroga Adán , García-Rincón Daniel , Gómez-Domínguez Daniel , Valero Manuel , Simón-Sánchez Samuel , Paraíso-Luna Juan , Aguareles José , Pujadas Mitona , Muguruza Carolina , Callado Luis F. , Lutz Beat , Guzmán Manuel , de la Prida Liset Menéndez , Galve-Roperh Ismael
Published: January 2020

Prenatal exposure to Δ9-tetrahydrocannabinol (THC), the most prominent active constituent of cannabis, alters neurodevelopmental plasticity with a long-term functional impact on adult offspring. Specifically, THC affects the development of pyramidal neurons and GABAergic interneurons via cannabinoid CB1 receptors (CB1R). However, the particular contribution of these two neuronal lineages to the behavioral alterations and functional deficits induced by THC is still unclear. Here, by using conditional CB1R knockout mice, we investigated the neurodevelopmental consequences of prenatal THC exposure in adulthood, as well as their potential sex differences. Adult mice that had been exposed to THC during embryonic development showed altered hippocampal oscillations, brain hyperexcitability, and spatial memory impairment. Remarkably, we found a clear sexual dimorphism in these effects, with males being selectively affected. At the neuronal level, we found a striking interneuronopathy of CCK-containing interneurons in the hippocampus, which was restricted to male progeny. This THC-induced CCK-interneuron reduction was not evident in mice lacking CB1R selectively in GABAergic interneurons, thus pointing to a cell-autonomous THC action. In vivo electrophysiological recordings of hippocampal LFPs revealed alterations in hippocampal oscillations confined to the stratum pyramidale of CA1 in male offspring. In addition, sharp-wave ripples, a major high-frequency oscillation crucial for learning and memory consolidation, were also altered, pointing to aberrant circuitries caused by persistent reduction of CCK+ basket cells. Taken together, these findings provide a mechanistic explanation for the long-term interneuronopathy responsible for the sex-dimorphic cognitive impairment induced by prenatal THC.
Pro-death signaling of cytoprotective heat shock factor 1: upregulation of NOXA leading to apoptosis in heat-sensitive cells
Authors: Janus Patryk , Toma-Jonik Agnieszka , Vydra Natalia , Mrowiec Katarzyna , Korfanty Joanna , Chadalski Marek , Widłak Piotr , Dudek Karolina , Paszek Anna , Rusin Marek , Polańska Joanna , Widłak Wiesława
Published: January 2020

Heat shock can induce either cytoprotective mechanisms or cell death. We found that in certain human and mouse cells, including spermatocytes, activated heat shock factor 1 (HSF1) binds to sequences located in the intron(s) of the PMAIP1 (NOXA) gene and upregulates its expression which induces apoptosis. Such a mode of PMAIP1 activation is not dependent on p53. Therefore, HSF1 not only can activate the expression of genes encoding cytoprotective heat shock proteins, which prevents apoptosis, but it can also positively regulate the proapoptotic PMAIP1 gene, which facilitates cell death. This could be the primary cause of hyperthermia-induced elimination of heat-sensitive cells, yet other pro-death mechanisms might also be involved.
Author Correction: A novel ruthenium (II)-derived organometallic compound, TQ-6, potently inhibits platelet aggregation: Ex vivo and in vivo studies
Authors: Hsia Chih-Hsuan , Velusamy Marappan , Sheu Joen-Rong , Khamrang Themmila , Jayakumar Thanasekaran , Lu Wan-Jung , Lin Kuan-Hung , Chang Chao-Chien
Published: January 2020

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Hillock assisted p-type enhancement in N-polar GaN:Mg films grown by MOCVD
Authors: Rocco Emma , Licata Olivia , Mahaboob Isra , Hogan Kasey , Tozier Sean , Meyers Vincent , McEwen Benjamin , Novak Steven , Mazumder Baishakhi , Reshchikov Michael , Douglas Bell L. , Shahedipour-Sandvik F.
Published: January 2020

We report on the enhanced incorporation efficiency of magnesium dopants into facets of hexagonal hillock structures in N-polar GaN, studied by comparative analysis of GaN:Mg films grown by MOCVD on high and low hillock density GaN template layers. Total magnesium concentration in planar regions surrounding a hillock structure is comparable to that within hillock sidewall facets measured at 1.3 × 1019 cm−3 by atom probe tomography, and clustering of Mg atoms is seen in all regions of the film. Within individual hillock structures a decreased Mg cluster density is observed within hillock structures as opposed to the planar regions surrounding a hillock. Additionally, the Mg cluster radius is decreased within the hillock sidewall. The favorable incorporation of Mg is attributed to Mg dopants incorporating substitutionally for Ga during growth of semi-polar facets of the hillock structures. Enhanced p-type conductivity of GaN:Mg films grown on high hillock density template layers is verified by optical and electrical measurement.
Nonrelativistic electron–electron Møller scattering in a nonadiabatic tunnel-ionizing surface plasmon field
Authors: Greig S. R. , Khurgin J. B. , Elezzabi A. Y.
Published: January 2020

Ultrafast processes occurring on nanoscale surfaces can be probed with ultrafast low-energy electron pulses. Specifically, for metallic samples, the interaction of free electrons with surface plasmon fields provides insight into the nanoscale electron dynamics at the surface. Current models and experiments include the interaction of electrons with the sample, but ignore electron–electron and electron–plasmon interactions. Here we show that secondary electrons and their interaction with the incident primary electrons via nonrelativistic Møller scattering in the presence of optical and surface plasmon fields significantly alters the electron dynamics probed with ultrafast low-energy electron microscopy. Modeling this electron–plasmon interaction is key for interpreting ultrafast electron dynamics on metallic surfaces.
Modulation of immune responses with nanoparticles and reduction of their immunotoxicity
Authors: Muhammad Qasim , Jang Yeonwoo , Kang Shin Hyuk , Moon James , Kim Won Jong , Park Hansoo
Published: January 2020

Particles with a size range of 1–100 nm used in various fields of life sciences are called nanoparticles (NPs).
The dual-catalyzed boryldifluoroallylation of alkynes: an efficient method for the synthesis of skipped gem-difluorodienes
Authors: Zhuo Kai-Feng , Xu Wen-Yan , Gong Tian-Jun , Fu Yao
Published: January 2020

The Cu/Pd-catalyzed boryldifluoroallylation of alkynes was achieved, providing the skipped gem-difluorodiene scaffolds with high regio- and stereoselectivity. An array of synthetic building blocks can be obtained via further transformations.
Record-high stability and compactness of multiply-charged clusters aided by selected terminal groups
Authors: Zhong Ming Min , Fang Hong , Jena Puru
Published: January 2020

Multiply-charged clusters with compact sizes that are stable in the gas phase are important due to their potential applications as weakly-coordinating ions and building blocks of bulk materials.
Synthesis, transport properties and electronic structure of p-type Cu1+xMn2−xInTe4 (x = 0, 0.2, 0.3)
Authors: Hobbis Dean , Shi Wencong , Popescu Adrian , Wei Kaya , Baumbach Ryan E. , Wang Hsin , Woods Lilia M. , Nolas George S.
Published: January 2020

The synthesis, electronic structure and temperature dependent transport properties of polycrystalline Cu1+xMn2−xInTe4 (x = 0, 0.2, 0.3) are reported for the first time.
Placenta as a target of trichloroethylene toxicity
Authors: Elkin Elana R. , Harris Sean M. , Su Anthony L. , Lash Lawrence H. , Loch-Caruso Rita
Published: January 2020

Trichloroethylene (TCE) is an industrial solvent and a common environmental contaminant. Reactive metabolites of TCE disrupt placental cell functions important for pregnancy health.
Effect of thermal treatment on the stability of Na–Mn–W/SiO2 catalyst for the oxidative coupling of methane
Authors: Matras Dorota , Vamvakeros Antonios , Jacques Simon D. M. , Grosjean Nicolas , Rollins Benjamin , Poulston Stephen , Stenning Gavin B. G. , Godini Hamid R. , Drnec Jakub , Cernik Robert J. , Beale Andrew M.
Published: January 2020

The effect of different calcination protocols on the performance of a Na–Mn–W/SiO2 catalyst is studied with laboratory and synchrotron X-ray based characterisation techniques.
Synergetic combination of a mesoporous polymeric acid and a base enables highly efficient heterogeneous catalytic one-pot conversion of crude Jatropha oil into biodiesel
Authors: Pan Hu , Liu Yanan , Xia Qineng , Zhang Heng , Guo Li , Li Hu , Jiang Lingchang , Yang Song
Published: January 2020

Highly efficient conversion of crude Jatropha oil to biodiesel was realized under mild conditions via a synergistic catalytic system consisting of acid (MICPHPW) and base (MICPOH) catalysts using a ‘one-pot, two-step’ strategy.
Analysis of plant samples by low-power total reflection X-ray fluorescence spectrometry applying argon-peak normalization
Authors: Shao Jinfa , Jia Wenbao , Zhang Xinlei , Liu Yong , Tang Xinru , Xiong Genchao , Shan Qing
Published: January 2020

A method was established for the determination of the elemental composition in plant samples using the characteristic argon fluorescence peak in the air as a normalization standard via LP-TXRF spectrometry using polychromatic X-ray excitation.
Preferred orientations of organic cations at lead-halide perovskite interfaces revealed using vibrational sum-frequency spectroscopy
Authors: Sung Woongmo , Müller Christian , Hietzschold Sebastian , Lovrinčić Robert , Gallop Nathaniel P. , Bakulin Artem A. , Nihonyanagi Satoshi , Tahara Tahei
Published: January 2020

Using vibrational sum frequency generation (VSFG) spectroscopy, we investigate the behaviour of organic cations at the surface of a series of multilayer lead halide perovskite systems, finding that the behaviour of the organic cations changes dramatically close to the interface.
Radical enhancement of molecular thermoelectric efficiency
Authors: Sangtarash Sara , Sadeghi Hatef
Published: January 2020

The challenge in exploiting quantum interference (QI) in molecules for thermoelectricity lies in controlling the alignment of QI induced resonances close to electrodes Fermi level. We show that spin orbitals in stable radicals can be utilised to overcome this challenge.
Structures of the solvated copper(ii) ion in ammonia at various temperatures
Authors: Da-yang Tabouli Eric , Fifen Jean Jules , Malloum Alhadji , Lahmar Souad , Nsangou Mama , Conradie Jeanet
Published: January 2020

We investigated theoretically the structures and relative stabilities of the solvated copper(ii) ion in ammonia, Cu2+(NH3)n, n = 1–10.
Multi-responsive drug delivery nanoplatform for tumor-targeted synergistic photothermal/dynamic therapy and chemotherapy
Authors: Qin Xiang , Wang Zhiqiang , Guo Changhong , Jin Yingxue
Published: January 2020

“From one to all” multi-mode therapy using an integrated nanoplatform of multi-responsive GFCDH nanoparticles for tumor-targeted synergistic photothermal, photodynamic and chemotherapy.
Three-dimensional cavity-coupled metamaterials for plasmonic color and real-time colorimetric biosensors
Authors: Zhu Jia , Lin Guanzhou , Huang Yun , Zhang Kenan , Wu Meizhang , Wu Wengang , Lu Peimin
Published: January 2020

Three-dimensional cavity-coupled plasmonic metamaterials for high sensitive real-time and colorimetric biosensor.
Thiostannate coordination transformation-induced self-crosslinking chalcogenide aerogel with local coordination control and effective Cs+ remediation functionality
Authors: Kang Yeo Kyung , Lee Heehyeon , Ha Thanh Duy Cam , Won Jong Kook , Jo Hongil , Ok Kang Min , Ahn Sangdoo , Kang Byungman , Ahn Kyunghan , Oh Youngtak , Kim Myung-Gil
Published: January 2020

Self-crosslinking polymerization between Sn2S64− clusters resulted transition metal free chalcogel with local coordination control and effective Cs+ remediation functionality.
An oroxylin A-loaded aggregation-induced emission active polymeric system greatly increased the antitumor efficacy against squamous cell carcinoma
Authors: Zhu Yejin , Guo Yongjian , Liu Mengdi , Wei Libin , Wang Xiaotang
Published: January 2020

A novel AIE-active drug delivery system was developed for imaging-guided cancer therapy with improved efficacy.
Low-dose paclitaxel via hyaluronan-functionalized bovine serum albumin nanoparticulate assembly for metastatic melanoma treatment
Authors: Chen Xue , Wang Mou , Hu Ying , Gong Tao , Zhang Zhi-Rong , Yu Ruilian , Fu Yao
Published: January 2020

Due to the critical role of CD44 in mediating cell adhesion and migration, CD44-targeted drug delivery via hyaluronan has been extensively explored.
Polymer microneedles with interconnected porous structuresviaa phase inversion route for transdermal medical applications
Authors: Liu Pei , Du Hongyao , Chen Yu , Wang Hua , Mao Jinzhu , Zhang Lianbin , Tao Juan , Zhu Jintao
Published: January 2020

An efficient yet robust phase inversion strategy for the fabrication of polymer microneedles with highly porous and interconnected structures has been reported.
White-light emission from HMIMBF4–TiO4(A) colloidal hybrid electrolyte and surface modification of TiO2 using ionic liquid in hybrid optoelectronic devices
Authors: Thanikachalam Venugopal , Seransenguttuvan Balu , Jayabharathi Jayaraman
Published: January 2020

Combination of blue and yellow light from HMIMBF4–TiO2(A) results in white light emission.
Editorial Perspectives: the need for a comprehensive, centralized database of interbasin water transfers in the United States
Authors: Dickson Kerim E. , Marston Landon T. , Dzombak David A.
Published: January 2020

Kerim Dickson, Landon Marston and David Dzombak provide an ‘Editorial Perspective’ on the importance of understanding interbasin water transfers in managing water resources.
Correction: Application of a Sn4+ doped In2S3 thin film in a CIGS solar cell as a buffer layer
Authors: Kim SeongYeon , Mina Md. Salahuddin , Kim Kihwan , Gwak Jihye , Kim JunHo
Published: January 2020

Correction for ‘Application of a Sn4+ doped In2S3 thin film in a CIGS solar cell as a buffer layer’ by SeongYeon Kim et al., Sustainable Energy Fuels, 2020, 4, 362–368.
Distributed cooperative control method based on network topology optimisation in microgrid cluster
Authors: Dou Chunxia , Li Yuanzhe , Yue Dong , Zhang Zhanqiang , Zhang Bo
Published: January 2020

When several microgrids are interconnected into microgrid cluster (MGC), the network topology of MGC system would be more complex. Traditional hierarchical control based on droop control tends to make full use of all networks so that the costs of energy exchange could be high. Considering the voltage stability and power sharing of MGC system, a distributed cooperative control method based on network topology optimisation for MGC is proposed to control the power flow of multi‐microgrid system. Specially, preliminary Q‐leaning algorithm is utilised with establishment of new adjacency matrices for the distributed cooperative control to decrease the costs. Moreover, multi‐level controls based on consensus protocol are proposed in the distributed cooperative MGC system to eliminate the necessity of a central controller. The adaptive regulation based on the state of charge among the battery groups will be taken as the first‐level control. The second‐level control including the current controller, voltage controller and power controller is implemented among the DGs and a novel third‐level control based on consensus is applied in eliminating the voltage deviation caused by the first‐level control and the second‐level control. The effectiveness of the proposed method is verified through the simulation by simulink.
An FPTAS for just-in-time scheduling of a flow shop manufacturing process with different service quality levels
Authors: Elalouf Amir
Published: January 2020

This paper addresses the problem of identifying a profit-maximizing schedule for jobs in a just-in-time production line, where the decision maker can adjust each job’s processing time, and thereby its quality level and the profit that can be gained from it. The system comprises two sequential machines with a transition period between them and a setup time after completion of each job on the second machine. We first construct an exact algorithm that maximizes the profit. Since this problem is NP-hard, we construct a fully polynomial time approximation scheme (FPTAS) to address it and evaluate its computational complexity.
Syntheses of cis- and trans-Jamtine and Their N-Oxides via a Benzyl Configuration-Inversion Approach
Authors: Zheng Huaiji , Liu Zhigang , Wang Zhengshen , Li Yujie , Zhang Qiang , Gao Jin-Ming
Published: January 2020

A novel synthesis of the tetrahydroisoquinoline alkaloid jamtine and its epimer is reported. The synthetic strategy hinges on a one-pot conjugate reduction/Robinson cyclization sequence and an efficient benzyl configuration inversion by an oxidation/reduction approach. The N-oxide derivatives of the jamtine isomers were also synthesized and identified by X-ray crystallographic analysis. Additionally, a density functional theory calculation for the four possible N-oxide structures was exploited to gain further insight into the structure of the natural product in comparison to those of the synthetic N-oxides, because the NMR data of the synthetic derivatives did not match those reported for natural jamtine N-oxide.
Visible-Light-Triggered Decarboxylative Alkylation of 8-Acylaminoquinoline with N-Hydroxyphthalimide Ester
Authors: Sun Bin , Li Deyu , Zhuang Xiaohui , Zhu Rui , Aisha Aertuke , Jin Can
Published: January 2020

A facile protocol for visible-light-induced decarboxylative radical coupling of NHP esters with 8-aminoquinoline amides is reported, affording a highly efficient approach to synthesize a variety of 2-alkylated or 2,4-dialkylated 8-aminoquinoline derivatives. The reaction proceeds smoothly without adding any ligand, and provides the corresponding products containing a wide range of functional groups in moderate to excellent yields. This reaction uses readily available starting materials, and proceeds under mild conditions and with operational simplicity.
Management of Spasticity in Cerebral Palsy: An Electroencephalogram-Oriented Novel Approach
Authors: Jaseja Harinder
Published: January 2020

Cerebral palsy (CP) is commonly associated with spasticity though the exact pathophysiology is still unknown. Management of spasticity is an important aspect of care because it can adversely affect quality of life. Patients with CP also commonly exhibit interictal epileptiform discharges (IEDs) on their electroencephalograms (EEGs) even without clinical epilepsy. This brief article studies the relationship between spasticity and IEDs. Based on the intrinsic relationship between the two and available pathophysiological evidence of spasticity, the author suggests a mandatory EEG in all patients with CP and spasticity and consideration for initiation of IEDs when detected.
An Update on Acute Pancreatitis
Authors: Ivan Catalin V. , Stephenson James A. , Shah Vikas , Sandrasegaran Kumaresan , Rajesh Arumugam
Published: January 2020

In recent years, there have been further advances in understanding of the acute pancreatic inflammation and its complications. Among these are emerging concepts such as peripancreatic necrosis and main duct injury secondary to necrotizing pancreatitis. To remain relevant to the clinical teams, radiologists need to be aware of these advances in knowledge and their reports should provide key points of information that may impact patient management. This article provides an up to date review of acute pancreatitis.
Noise stability of synchronization and optimal network structures
Authors: Katoh Yuriko , Kori Hiroshi
Published: January 2020

We provide a theoretical framework for quantifying the expected level of synchronization in a network of noisy oscillators. Through linearization around the synchronized state, we derive the following quantities as functions of the eigenvalues and eigenfunctions of the network Laplacian using a standard technique for dealing with multivariate Ornstein–Uhlenbeck processes: the magnitude of the fluctuations around a synchronized state and the disturbance coefficients αi that represent how strongly node i disturbs the synchronization. With this approach, we can quantify the effect of individual nodes and links on synchronization. Our theory can thus be utilized to find the optimal network structure for accomplishing the best synchronization. Furthermore, when the noise levels of the oscillators are heterogeneous, we can also find optimal oscillator configurations, i.e., where to place oscillators in a given network depending on their noise levels. We apply our theory to several example networks to elucidate optimal network structures and oscillator configurations.
Effects of medium range order on propagon thermal conductivity in amorphous silicon
Authors: Hashemi Amirreza , Babaei Hasan , Lee Sangyeop
Published: January 2020

We discuss the dependence of the propagon contribution to thermal conductivity on the medium range order (MRO) in amorphous silicon. Three different amorphous structures with the same size of 3.28 nm were studied. Among these three structures, two structures were constructed with experimentally observed MRO [M. M. J. Treacy and K. B. Borisenko, Science 335, 950 (2012)], and the other structure is from continuous random network (CRN), which lacks MRO and thus represents a randomized amorphous structure [G. Barkema and N. Mousseau, Phys. Rev. B 62, 4985 (2000)]. Using the simulated fluctuation electron microscopy and dihedral angle distribution, we confirm that the first two structures contain MRO in the length scale of 10–20 Å while the CRN structure does not. The transport of propagons in the MRO and CRN structures is compared using the dynamic structural factor calculation and normal mode decomposition of the molecular dynamics simulation data, showing noticeably longer lifetime of propagons in MRO structures than in the CRN structure. The propagon thermal conductivity in MRO structures is estimated to be 50% larger than that in the CRN structure.
Impact of electron–phonon coupling on the quantum yield of photovoltaic devices
Authors: Nematiaram Tahereh , Asgari Asghar , Mayou Didier
Published: January 2020

In describing the charge carriers’ separation mechanism in the organic solar cell, providing a method, which considers the impact of all parameters of interest on the same footing within an inexpensive numerical effort, could play an essential role. We use here a simple tight-binding model to describe the dissociation of the charge carriers and investigate their dependence on the physical parameters of the system. We demonstrate that the quantum yield of the cell is subtly controlled by the collective action of the Coulomb interaction of the electron–hole pair, electron–phonon coupling, and the geminate recombination of the charge carriers. This approach should help us understand the performance of organic solar cells and optimize their efficiency.
Controlling the Coffee Ring Effect on Graphene and Polymer by Cations*
Authors: Yang Haijun , Yang Yizhou , Sheng Shiqi , Wen Binghai , Sheng Nan , Liu Xing , Wan Rongzheng , Yan Long , Hou Zhengchi , Lei Xiaoling , Shi Guosheng , Fang Haiping
Published: January 2020

Recently, there are great efforts that have been taken to suppressing/controlling the coffee ring effect, but it is of challenge to achieve inexpensive and efficient control with less disturbance, suitable for scalable production and highly enhancing the printing/dyeing color fastness. By only adding trace amounts of salt into the suspensions, here we experimentally achieve the facile and highly efficient control of the coffee ring effect of suspended matter on substrates of graphene, natural graphite, and polyethylene terephthalate surfaces. Notably, friction force measurements show that ion-controlled uniform patterns also greatly enhance color fastness. Molecular dynamics simulations reveal that, due to strong hydrated cation-π interactions between hydrated cations and aromatic rings in the substrate surface, the suspended matters are adsorbed on the surfaces mediated by cations so that the suspended matters are uniformly distributed. These findings will open new avenues for fabricating functional patterns on graphene substrates and will benefit practical applications including printing, coating, and dyeing.
Kenyan tea is made with heat and water: how will climate change influence its yield?
Authors: Rigden A J , Ongoma V , Huybers P
Published: January 2020

Tea is the most consumed beverage in the world apart from water. Climate change is anticipated to affect the tea industry, but quantified large-scale predictions of how temperature and water availability drive tea production is lacking in many regions. Here, we use satellite-derived observations to characterize the response of tea yield to water and heat stress from 2008 to 2016 across Kenya, the third largest producer of tea. We find that solar-induced fluorescence captures the interannual variability in tea yield remarkably well (Pearson’s correlation coefficient, r = 0.93), and that these variations are largely driven by the daily dynamics of soil moisture and temperature. Considering rising temperature in isolation suggests that yields in 2040–2070 would decrease by 10% relative to 1990–2020 (ranging between −15% to −4% across 23 models), but most climate models also simulate an increase in soil moisture over this interval that would offset loss, such that yields decrease by only 5% (ranging between −12% to +1%). Our results suggest that adaptation strategies to better conserve soil moisture would help avert damage, but such changes require advanced planning due to the longevity of a tea plant, underscoring the importance of better predicting soil moisture over the coming decades.
Forming and developing a green transport corridor in the Arctic
Authors: Teslya A , Gutman S
Published: January 2020

The paper discusses problems related to transport infrastructure in the Russian Arctic, including one of the most important international transport corridors, the Northern Sea Route. We have established that Arctic ports are one of the weakest components of the transport corridor of the Northern Sea Route. We have carried out comparative analysis of the main ports and their infrastructure, considering the possibilities for developing the Northern Sea Route as part of the infrastructure of a green transport corridor. We have constructed a strategic map for the green transport corridor (i.e., a sustainable transport system including five components: sustainability, stakeholders, industry and entrepreneurship, qualifications and personnel, financial resources and budget). Causal relationships between the components have been found and key performance indicators for the sustainability component have been formulated.
Transport and logistics hub for unmanned aircraft
Authors: Levshonkov N V , Golovina E S
Published: January 2020

The problems of a transport and logistics hub and its technical equipment for cargo receiving and sending by remoted-piloted vehicle unmanned aircraft are explored. The advantages of remoted-piloted vehicles using for multimodal transportation are shown. The general information of the necessary equipment for landing fields and cargo terminals are provided. The principles of an intelligent dispatch system with a dedicated module as part of the transport and logistics hub are outlined. Recommendations of the introduction of multimodal transportation in commercial exploitation are presented.
To a question on the possibility of using mechanoluminescent sensor elements with area-distributed sensitivity in aerospace engineering
Authors: Tatmyshevskiy K V , Pavlov D D
Published: January 2020

This article considers the question of the possibility of using distributed mechanoluminescent sensor elements to create materials with a self-diagnostics function for use in aerospace engineering. In particular, it is proposed to use these sensor elements to monitor the condition of the shell and detect impacts and collisions. A brief description of the phenomenon of mechanoluminescence is given and the design of a sensor imitating a sheathing element is described in this article. The main attention is paid to an experimental study of simulating the collision of a solid with a composite material, which has a mechanoluminescent sensor element distributed over the area. The results of data processing are presented and made the conclusion about the possibility of using this type of structures for structural health monitoring in aerospace technique.
Research of dynamic characteristics of the hybrid electrohydraulic aircraft actuator with combined speed control
Authors: Alekseenkov A S , Erofeev E V
Published: January 2020

The paper presents the results of mathematical modeling and experimental research of the dynamic characteristics of the prototype of aircraft hybrid electrohydraulic steering actuator with combined speed control. The mathematical modeling of dual-mode electrohydraulic actuator was performed in the MatLab Simulink and the experimental research was carried out at the control systems test-rig in Central Aerohydrodynamic Institute. The main goal of the experimental research was to determine the output characteristics of actuator, among them static (speed and mechanical) and dynamic (bode-diagrams, transients responses and dynamic stiffness) in the backup (autonomous) and main modes of its operation, including when the actuator was under load.
Support for decision-making to combat natural fires in Taiga-Analyst system
Authors: Dorrer G A , Kobijzhakova S V , Yarovoy S V
Published: January 2020

The system of regulatory documents defining the processes of decision-making on combating natural fires in the Russian Federation is described and the necessity of creating an information system to support decision-making in this field is justified. The processes of detection and response to natural fires are presented in the form of agency models. The structure of the system of support of decision-making on the use of resources and means for fire elimination, based on the software product “Taiga - Analyst,” is proposed. The system is implemented on the basis of agency simulation modelling and allows to select forces and means for fire control, model its propagation and elimination with reference to the terrain map using a geographic information system. The scheme of decision-making in the fight against natural fires using the proposed system is shown. Participants of fire fighting as agents from the moment of fire detection to the moment of use of forces and means are considered in detail. A comparative analysis is presented with an indication of the technical characteristics of aircraft involved in the fight against natural fires.
Rhenium behavior in the KF-KBF4-B2O3-KReO4 melt
Authors: Arkhipov S P , Apisarov A P , Isakov A V , Chernyshov A A , Tuzyuk A A , Zaikov Y P
Published: January 2020

The present paper is devoted to the study of the electrolyte temperature influence on the cathode process of rhenium reduction on the glassy carbon anode by the cyclic voltammetry method. Experimental dependencies, which characterize the influence of the KReO4 addition on the KF-KBF4-B2O3 system liquidus temperature, were built according to the obtained data on the thermal analysis. It was found that rhenium reduction at lower electrolyte temperatures requires higher values of cathode overpotential.
Combined efficiency margin in the implementation of the DEA method
Authors: Kovalev I V , Kuznetsov A S , Zenutkin N V , Morozov E A , Zeitler A V
Published: January 2020

DEA (Data Envelopment Analysis) method and its modification are considered in the paper. An inefficient frontier is suggested to be introduced. The intersection of the efficient frontier and inefficient frontier is researched. The intersection of both frontiers helps to construct a hyper plane to separate a sample into two classes.
Analytical approach to the diversification effect evaluation of the innovative engineering projects portfolio for a machine-building enterprise
Authors: Golovenkin E N , Vilkov V Yu , Matronitsky D A , Bliznevsky A S , Voroshilova A A , Tuev E V
Published: January 2020

As a tool to reduce the risks of innovation at the machine-building enterprises the authors suggest a new methodology aimed at point-based assessment of innovation risks. However, the experts are more likely to give interval estimates when assessing the risks of innovation. To work with interval estimates, a new software system was developed. The authors suggest using a market model that assumes a division of risks into systematic and non-systematic and allows to take into account the effect of diversification of the innovative portfolio of the machine-building enterprise. The steps of the methodology and its approbation on the data on innovative projects of one of Russian Federal Space Agency (Roskosmos) enterprises are presented in the paper.
GERT-network optimization model for technologies of hazardous industry management
Authors: Baranov V V , Bliznevsky A S , Kaftasyev D A , Tynchenko Ya A , Kuznetsov A S
Published: January 2020

The paper introduces GERT-network optimization model for the technologies of hazardous manufacturing process management supported by the software of distributed production control systems. The development and implementation of the formal means for optimizing processes for the formation of managing hazardous industries using GERT-networks technology is presented. It allows to include into the model random deviations and uncertainty arising directly during the execution of each separate task of hazardous industries management technology.
Longitudial fluctuations of rotors of disk knife refiners
Authors: Vikharev S
Published: January 2020

The subject of the study is the longitudinal fluctuations of the rotors of disk knife refiners. The dynamic and mathematical models of rotors of disk mills are developed. As a result of the research, a methodology for calculating the longitudinal fluctuations of rotors is proposed and tested. The error in determining the lower frequencies of free fluctuations of the mill rotors does not exceed 9%. The lowest frequencies of free longitudinal fluctuations of the rotors of existing mills are in the range of 85-165 Hz, and the second and subsequent frequencies of free fluctuations are in the frequency range above 1 kHz. When designing and operating disk knife refiners, it is necessary that the minimum inter-knife gap between the rotor and stator does not exceed the amplitude of fluctuations of the mill disk. The developed calculation procedure can be used in other industries, for example, mining and metallurgy.
Assessment of technological development and economic sustainability of domestic industry in modern conditions
Authors: Sadriddinov M I , Mezina T V , Morkovkin D E , Romanova Ju A , Gibadullin A A
Published: January 2020

The study is devoted to assessing the technical and technological sustainability of industrial production in the Russian Federation. The study proved that the basis of the Russian economy is industrial production, the results of which form the country’s gross domestic product, maintains socio-economic stability and provides the population with various consumer goods. At the same time, the analyzed indicators of output, depreciation and renewal of fixed assets and the level of innovative development of production capacities indicate a drop in the technical and technological stability of industrial production. The work proposed a structural-logical scheme for ensuring technological development and economic sustainability of industrial production, containing requirements for the development of indicators for determining sustainability and mechanisms for its achievement in the context of the implementation of different scenarios for the development of industrial production. In conclusion, the study presents the main findings and results of the work.
Torsion of anisotropic and inhomogeneous prismatic rods with a rectangular cross section
Authors: Derevyannykh E A , Maksimov A N , Mitrofanova T V , Smirnova T N , Kopysheva T N
Published: January 2020

The limiting state of prismatic rods made of anisotropic material under torsion under the condition of translational plasticity is investigated. The rod of heterogeneous material is represented by a composite rod, when different plasticity conditions are true in different parts of the rod. Basic relations are determined by the method of characteristics. A field of characteristics of the basic relations for anisotropic and composite rods is constructed under the condition of translational plasticity, relations are obtained by characteristics, a tension break lines are found.
Simulation of the process of conduction of thermal energy transfer through the multilayer wall of the apparatus
Authors: Tuishchev A I , Tretyakova T P , Ozerova T S , Kulakova Yu P
Published: January 2020

We consider a multilayer wall of the apparatus, consisting of dissimilar materials, having heat loading during heat transfer in the form of conduction (thermal conductivity). Using the basic law of thermal conductivity, mathematical expressions are derived that makes it possible to calculate the basic indicators of thermal conductivity for various multilayer walls consisting of different materials. As a demonstration of the application of the above approach, an example of calculating the equivalent coefficient of thermal conductivity and specific heat flux of a printed circuit board is given.
Prediction of cutting force during hard turning of 105WCr6 steel using artificial neural network and neuro-fuzzy modeling
Authors: Rastorguev D A , Sevastyanov A A
Published: January 2020

In this work research of correlation between mean value and range of cutting force and processing modes during hard turning of 105WCr6 steel is presented. The results of three-factor experiment on end face cutting of ring workpieces hardened to 55 HRC are presented. During experiment cutting speed, feed and cutting depth are varied. The value of the cutting force is estimated indirectly by the value of current load of the main drive motor. For the development of the model which can predict the value of cutting force at given cutting modes feed-forward neural network trained using Bayesian regularization algorithm and adaptive neuro-fuzzy inference system are used. Developed mathematical models can predict cutting force parameters with high accuracy.
Modeling and simulation of chemical processes using the hybrid methodology
Authors: Shornikov Yury V , Popov Evgeny A
Published: January 2020

Chemical processes are identified as hybrid dynamical or event-continuous systems. Features of modeling and simulation of systems of this kind are discussed. A modeling and simulation environment named ISMA is briefly described. A continuous ideally stirred-tank reactor is modeled and simulated in ISMA. The simulation results are given.
Intelligent decision - making support on the level of encryption of information transmitted in the UMV information exchange channels
Authors: Moiseev D V , Bryukhovetskiy A A , Skatkov A V
Published: January 2020

The paper considers the solution of the interdisciplinary fundamental scientific problem of ensuring the reliability and high throughput of information exchange channels (IEX) between unmanned vehicles (UMV) located in different environments and dispatch centers (DC) of the “smart city”. The solution of the management problem of providing a reliable and high-bandwidth IEX between UMV and DC in different environments requires the development of an intelligent decision support system to select the level of encryption of information transmitted over open communication channels, under conditions of uncertainty.
Method development for analysis of information components of the monitoring system with a limited delay
Authors: Kravets O J , Panfilov I A
Published: January 2020

Methods of modeling and analysis of information components of a monitoring system are examined. They are based upon methods of the queueing theory. In particular, a limited waiting for service requests in a multi-linear system with a general queue is considered. Various types of failures have also been taken into consideration. Particular emphasis is made on deriving the analytic dependence of loss probabilities from factors that limit a waiting queue (i.e. number of positions available within a queue and maximum stay time in the given queue) in case of a simple stream of calls which are incoming for service, and the demonstrative law of channel occupancy distribution.
Modeling of algebraic analysis of PRESENT cipher by SAT solvers
Authors: Maro Ekaterina
Published: January 2020

Paper presents approaches to algebraic analysis of the reliability of symmetric block ciphers by solving Boolean satisfiability (SAT) problem. A description of the application of decision search algorithms by the DPLL method is given. The principle of formation of the SAT problem for algebraic analysis of PRESENT cipher is proposed, as well as the parameters of the obtained SAT problems for a different number of cipher rounds and plaintexts.
Nature-inspired algorithms for a scheduling problem in operational planning
Authors: Semenkina O E , Popov E A
Published: January 2020

The scheduling problem is a widespread one, and it is still not automatized mostly because of the so-called combinatorial explosion. The paper describes two different approaches to solving a hierarchical scheduling problem based on solution representation. The first one proposes to find an optimal order of projects and then to solve the resource-constrained project scheduling problem for each of them. The second one assumes that we can find a priority of all activities for all projects and use it in the schedule building process if there is a conflict in the choosing of the next activity. The paper considers some nature-inspired algorithms such as the intelligent water drops algorithm, a genetic algorithm and ant colony optimization as well as a self-configuring version of the last two. The algorithm performance and different solution representation approaches are compared using the results of solving the test problems.
Analysis of noise immunity of GLONASS and GPS positioning receivers
Authors: Dubrovin A G , Baranov Yu N , Katunin A A , Markin N I
Published: January 2020

The article describes the method of comparative analysis of noise immunity of GLONASS and GPS satellite positioning receivers based on a broadband noise oscillator which allows us to compare multivendor positioning receivers on a real-time basis. Besides, the suggested method enables to assess the capacity of a robust positioning signal produced by GLONASS and GPS systems to resist the noise. The method is charecterized by the clarity of obtained results and allows to choose products of the best quality among the commercially available models of positioning receivers.
Modeling and visualization of the Industry 4.0 cyber and physical productions
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Zharinov O O
Published: January 2020

An actual task is to design the modeling and visualizing components of the Industry 4.0 production division activity. The Industry 4.0 production division as a part of smart factory functions automatically with special cyber and physical systems (CPS). The smart factory projection is done as a program of the industrial economy sector prioritized development. To project a production division they use the systems of automatic projection (CAD) installed in an instrument designer PC. Smart factory CAD components are CPS graphical models means, which includes the production division graphical models and the models of product being manufactured. All graphical models have the full information similarity to the physical devices. There are components and description schemes of their interaction to create CAD software to project automatic productions.
Hardware reservation of cyber-physical production of the Industry 4.0
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Zharinov O O
Published: January 2020

An actual task has been studied to increase the Industry 4.0 production companies functioning safety with methods of cyber and physical systems machine reserving. The production machine reserving shall include some additional components to the technological equipment, which in their functions and properties duplicate the existing low-reliable components. With the method of cyber and physical systems reserving in production they can realize different schemes of assembly units transportation within the smart factory technological lines. Cyber and physical systems reserving schemes could be described as equivalent schemes (chains) to calculate the parameters and evaluate company duplicating efficiency are done according to the methods of the reliability theory. There is a scheme of typical technological line of cyber and physical production. There is a way of low-reliably cyber and physical systems reserving. There is a way of machine reserving of cyber and physical production with a pool of reserved cyber and physical systems. There is a scheme of the Industry 4.0 cyber and physical production transport system duplicating.
The intelligent analysis system and remote sensing images segmentation engineering by using methods of advanced machine learning and neural network modeling
Authors: Tokarev K E , Orlova Yu A , Rogachev A F , Chernyavsky A N , Tokareva Yu M
Published: January 2020

The article describes the main stages of the development of an intelligent system for analysis and segmentation of remote sensing data using deep machine learning and neural network modeling. In particular, the environment for creating an experimental software module was chosen, an experiment on training a neural network was implemented and the results of the training sample were evaluated.
Efficiency of distance measures in the automatic grouping of electronic radio devices by k-means algorithm
Authors: Shkaberina G Sh , Tovbis E M , Kazakovtsev L A , Shemyakov A O , Romanov A P , Lukonin N V
Published: January 2020

This study investigates the problem of separation mixed lot of semiconductor devices for space applications into homogeneous production batches. The impact of distancemeasures in clustering algorithmk-means on the accuracy of the separating a mixed production batch is studied. This paper proposes the K-means algorithm withsquared Mahalanobis distance as an alternative the squared Euclidean distance. With the various combined mixed lots of semiconductor devices it was shown, that the proposed squared Mahalanobis distance highly depends on the method for determining initial cluster centers.
Application of artificial neural networks to diagnostics of fluid-film bearing lubrication
Authors: Kornaeva E P , Kornaev A V , Kazakov Yu N , Polyakov R N
Published: January 2020

The paper deals with the problem of monitoring the complicated hydromechanical system of a rotary machine with fluid-film bearings. The prospect of accurate recognition of changes in the lubrication system, which are expressed in the appearance of air bubbles in the lubricant, is investigated. The monitoring of the state is carried out by means of high-speed measurements of shaft vibrations, lubricant pressure supply and other parameters. Measurement data are transmitted for analysis to an artificial neural network to recognize the state of the system. The developed neural network has demonstrated high recognition accuracy of more than 98 %. Some recommendations on the measurement results processing and the neural network settings are represented in the paper.