bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determination of the admissible region of asteroids with data from one night of observation
Authors: Espitia Mosquera Daniela , Andrés Quintero Salazar Edwin 
Published: June 2019

AbstractDuring the night of the discovery of an asteroid, a large number of images spaced in time, that represent an arc too short to propagate an orbit, are obtained. Initially, it is necessary to recover the body in the celestial vault to have more observations to determine its orbit. The first step in this process is to establish the admissible region, defined as the region in space where the object can be found. In this paper we present the calculation of the Admissible Regions from data from a single night observation, considering the geocentric and topocentric versions and restrictions such as belonging to the Solar System, the object does not belong to the Earth-Moon gravitational system, and the body is at a minimum distance from Earth. This procedure was applied in the calculation of the admissible regions of 2003 BH84, 3122 Florence, 3200 Phaethon, 555 Norma, 1738 Oosterhoff and 2006 SO375. The respective admissible regions were generated in their geocentric and topocentric variant, and the respective metric changes were made to visualize their geometric characteristics. It was found that the topocentric version generates a simpler geometry than the geocentric version, decreasing the re-observation area. It was identified that the logarithmic metric is appropriate for the study of regions near the Earth (NEO’s).
DFT Study on Metamagnetics β-M(OH)2 (M = Mn, Fe, Co, Ni)
Authors: Garcia-Castro A. C. , Ospina R. , Romero A. H. 
Published: June 2019

Abstract
First-principles calculations have been carried out in order to analyze the structural, vibrational, and magnetic properties in the A-type antiferromagnetic (AFM) -M(OH)2 metal transition hydroxides. Theoretical results demonstrate a quasi layer-by-layer magnetic behavior with strong ferromagnetic (FM) interactions in the intralayer plane and weak AFM behavior between the interlayer. This behavior corresponds to an A-type AFM behavior for -M(OH)2 (M = Mn, Fe, Co, and Ni) with energy differences around 3.0 meV with respect to the FM state. Structural analysis reveal a clear influence of Van der Waals (VdW) interactions in the stabilization of the phase giving high accuracy in lattice parameter when compared to experimental findings. Qualitative analysis of the magnetic exchange interactions reveals a higher exchange intralayer interaction for M = Ni, and higher exchange or dipolar interlayer interactions for M = Mn. Vibrational analysis, in the M = Ni case, demonstrate a correct IR and Raman modes assignments according to experimental results on the P ¯3m1 space group.
Developing a Robust Acquisition System for Fringe Projection Profilometry
Authors: Pineda Jesus , Marrugo Andres G. , Romero Lenny A. 
Published: June 2019

Abstract
Since Fringe Projection Profilometry (FPP) is an intensity-based coding strategy, it is prone to improper optical setup arrangement, surface texture and reflectance, uneven illumination distribution, among others. These conditions introduce errors in phase retrieval which lead to an inaccurate 3-D reconstruction. In this paper, we describe a dynamic approach toward a robust FPP acquisition in challenging scenes and objects. Our aim is to acquire the best possible fringe pattern image by adjusting the object closer to an ideal system-object setup. We describe the software implementation of our method and the interface design using LabVIEW. Experimental results demonstrate that the proposed method greatly reduces sources of error in 3-D reconstruction.
Development of critical and creative thinking skills to increase competence of PLC programming for electrical engineering education students
Authors: Rusimamto PW , Nurlaela L , Sumbawati MS , Munoto  , Samani M. 
Published: June 2019

Abstract
PLC learning emphasizes on teaching and learning activities as well as developing the concepts and skills of the students process with various teaching methods that are in accordance with the study materials being taught. PLC learning demands an active role for students, because PLC is a scientific process based on logical thinking based on supporting facts. The low ability of students thinking is caused by PLC learning so far only tends to hone aspects of remembering and understanding. Basically students have critical thinking skills in learning such as questioning skills, hypothesis, classification, observation and interpretation. Problem-based learning model (PBL) is a learning model designed on problem solving process that faced scientifically so that students get important knowledge. Thus expected students are adept at solving problems, have their own learning models and have the skills to participate in the team. Teacher’s role as a trainer in problem-based learning is asking about thinking, monitoring learning, probbing (challenging students to think), keeping students engaged, organizing group dynamics, keeping the process going. This critical and creative thinking design aims to make students able to think critically and able to consider everything and be able to act on the decisions that have been considered and creative thinking that aims to learners are able to create ideas, or ideas and able to express the idea to solve a problem.
Comparison of samples manufactured from 09CrNi2MoCu grade powder by selective laser melting with plate metal of the same grade
Authors: Zhukov A S , Barakhtin B K , Motovilina G D 
Published: June 2019

Abstract
The research data on the composition, structure and properties of samples manufactured by the selective laser melting of steel powder 09CrNi2MoCu, and plate metal samples of the same grade are provided. In the melted specimens, an atypical structure for this grade was found, and also the excess of some mechanical characteristics over similar ones for specimens from plate metal was found.
Potential dependence of silver passivation start on the solution composition
Authors: Kireev Sergey Yu , Perelygin Yury P 
Published: June 2019

Abstract
Based on the analysis of modern experimental data dedicated to anodic behaviour of silver in solutions containing halide anions, an equation establishing the dependence of the peak-start potential of silver passivation on the potential scan rate, ion halide concentration, and solubility product of silver halide, was obtained. It follows from the proposed equation that the smaller the solubility product value and the potential scan rate are, and the greater the concentration of anion halides is, the anode passivation occurs at a lower potential value. The equation agrees with the experimental data presented in the modern literature rather well. The results can be used in studies aimed at finding the optimal modes of anodic treatment of metals, the development of measures to increase the corrosion resistance of materials, as well as for the quantitative analysis of chlorides, bromides and iodides in solution, including their co-occurrence.
Evaluation of time to failure for radio transmitters under the radiation influence
Authors: Artjuhova M A , Balashov V M , Nazarevich S A , Smirnova M S 
Published: June 2019

Abstract
Aerospace systems occupy an important place in the information, telecommunication, defense infrastructure of the country. These systems have strict requirements for safety and reliability. The study of dependability allows you to find the distribution of device operating time to failure. This is especially important for the non-recoverable onboard equipment of aerospace systems. Practice shows that even 5 years of active life is difficult to achieve, and for profitability it is required to ensure 2-3 times more. For such a period of operation, the radio transmission devices of spacecraft are exposed to prolonged exposure to ionizing radiation of natural origin. This leads to accelerated aging of materials, degradation of parameters of the electronic component base and single effects of failures and failures in semiconductor devices and integrated circuits, which must be taken into account when analyzing the reliability of newly developed and modernized devices.
Improving the navigation spacecraft radio visibility with signal processing algorithms usage
Authors: Lomaev Yu S , Ivanov I A , Popov Eu A 
Published: June 2019

Abstract
The article deals with topical issues of spacecraft external design for the global navigation satellite system (GLONASS). The development and analysis of data processing algorithms are considered a part of the external design phase. Data for processing algorithms was obtained from real orbital grouping spacecraft. Mathematical modelling was performed based on real data to analyse navigation signals propagation conditions from GLONASS satellites. Implementation of mathematical modelling approach included such aspects as finding the optimal antenna pattern and filtering radio frequency signals. Theoretically optimal antenna directivity patterns were implemented taking into account available data about satellite orbital parameters. Bessel, Butterworth, Chebyshev and elliptic filters were used as standard filtering methods. Modified low-pass filtering algorithm was considered as an improved filtering algorithm. Application of the modified filtering method allowed to reduce geometric dilution of precision value in the consumer positioning case. Obtained results are applicable to design possible options for improving the existing GLONASS orbital group.
New BN polymorphs with two-dimensional structure
Authors: Ryashentsev D S , Belenkov E A 
Published: June 2019

Abstract
The calculation of the structure and electronic characteristics of polymorphic varieties of boron nitride with a two-dimensional structure was performed by the methods of the density functional theory. The possibility of stable existence of three main structural varieties is established: BN-L6, BN-L4-8 and BN-L4-6-12. The sublimation energies of these polymorphs of boron nitride are 18.14, 17.36, and 17.14 eV/(BN), respectively. The BN-L6 layer has a structure similar to that of experimentally synthesized hexagonal boron nitride. The layers BN-L4-8 and BN-L4-6-12 are new polymorphic varieties of boron nitride. The band gap of these layers is about 3.9 eV. This value is less than the calculated value of 4.69 eV for the band gap of the BN-L6 layer.
Structure and phase composition transformation in Cr20Ni80 + Ni2Al3 + CrAl7 layered coating under thermal effect
Authors: Shmorgun V G , Bogdanov A I , Taube A O , Shcherbin D V 
Published: June 2019

Abstract
The thermal stability of the Cr20Ni80 / (Ni2A13 + CrAl7) layered coating on Ml copper substrate was studied. It is found, that the sequence of phase transformations in layered coating during the heat treatment in temperature range of 700-1000 °C is Ni2Al3 + CrAl7 → Ni2Al3(Cr) + NiAl(Cr) → NiAl(Cr). It is shown, that an increase in temperature and duration of thermal effect leads to the alignment of Al, Ni and Cr content over the coating thickness due to the diffusion redistribution of elements and to the formation of a secondary reaction zone with a high chromium content.
Aluminizing of the Cr15Al5 alloy surface by hot-dipping in the melt
Authors: Shmorgun V G , Bogdanov A I , Slautin O V , Kulevich V P 
Published: June 2019

Abstract
The diffusion interaction at the interlayer boundary of the Cr15Al5 alloy during aluminizing by hot-dip in a molten bath of AK12M2 silumin is investigated. It is shown that subsequent heat treatment at 1000 °C leads to the formation on the surface of the Cr15Al5 alloy a coating of variable composition based on iron aluminides FeAl(Cr, Si) / Fe3Al(Cr, Si) / Fe(Al, Cr, Si). Grain growth in the Cr15Al5 alloy and a decrease in the density of carbide inclusions with their segregation along the grain boundaries ensures a decrease in its microhardness compared to as-received condition from 2.1 to 1.6 GPa.
Technology of differentiated application nitrogen fertilizers according to the map of steady intra -field heterogeneity of soil fertility
Authors: Semizorov S A , Petukhov D A 
Published: June 2019

Abstract
The article presents the results of studies of precision farming technology in the experimental field of the validation landfill. It allows assessing the fertility zones and differentially affecting the identified field soil heterogeneity in order to increase the yield of winter wheat. A description of the “Agronavigator-Asur-Dozator” navigation system is given. The system allows a given dose of fertilisation depending on the working speed of the machine and its location in the field. It also provides parallel driving of agricultural machinery with different accuracy of determining the coordinates and automatic control of making granular mineral fertilizers. An original scheme of experiments on the differentiated winter wheat subcortex by the square-nesting method with an interval of 50 kg on a regular network with a step of 80 × 90 m and determination of yield with GPS reference using the specialized software of the Agronomist is given. The effectiveness of mineral fertilizers in different areas of the map of the steady intra-field heterogeneity of soil fertility of the land cover is substantiated and the economic efficiency of differential fertilizer application is calculated.
Towards intelligent control system for computer numerical control machines
Authors: Nikolaev E I 
Published: June 2019

Abstract
Advances in deep learning have led to impressive results in recent years. The new technologies such as convolutional neural networks, reinforcement learning and generative adversarial networks have shown a real promise for industrial and real-life applications. In this paper, the results of the experimental research on designing, training and implementation of the intelligent control system for the computer numerical control (CNC) machine were presented. The results indicate that using the generative adversarial technique in conjunction with reinforcement learning is possible to design and train the control systems for the machine tools. Building intelligent models in the absence of large datasets of labelled data is a crucial task. One of the key points of this experimental study is the training of a model of the control system using a set of unmarked data. This is achieved by using a reinforcement learning technique. A designed model can be deployed on the physical machine tools like a computer numerical control machine. At the presented research the laser engraver CNC machine is used. In this paper, the architecture of the computer intelligent control system for the laser engraver and the process of its training are described. The proposed model can be applied to different types of CNC machines.
Ultra-wide band positioning for automatic guided vehicles
Authors: Chugunov A A , Kulikov R S , Tsaregorodcev D V , Petukhov N I 
Published: June 2019

Abstract
In this paper we propose ultra-wide band radio solution for indoor AGV positioning. Advantages over known solutions are described. Characteristics of the used ultra-wide band component base are given. Considered solution consists from anchors and tags. System operates with RTDoA method. Extended Kalman Filter algorithm is used to estimate the coordinates of the tag. Modified Extended Kalman Filter algorithm is obtained. It allows to eliminate erroneous measurements from solution. Result of the experiment are shown.
Aggregated multi-criteria model of enterprise management engineering, taking into account the social priorities of the region
Authors: Bondarenko Yu V , Sviridova T A , Averina T A 
Published: June 2019

Abstract
The article is devoted to the development of an aggregated multi-criteria model of enterprise management engineering. The basis of the proposed approach is the understanding of the significance of a modern engineering enterprise not only for the economic, but also the social development of the region. The article focuses on the social priorities of the region in creating new jobs and increasing nominal wages at the enterprises of the machine-building complex. The model takes into account the main economic dependencies of the operation of the enterprise, as well as restrictions on the achievement of the values of the labor force required for the region and the average nominal wage. As the criteria of optimality, the maximization of the total profit for the period of profit, taking into account the profit tax, was chosen; the maximization of the minimum in time of return on capital (ROA) was taken. The software implementation and discussion of the calculation results confirmed the practical significance of the research carried out for the management of the region and the machine-building enterprise, and also outlined ways for its further improvement.
Logistics technologies in mechanical engineering complex: the prospects for outsourcing applying
Authors: Freidman O A , Malanina Yu N 
Published: June 2019

Abstract
The current state of the mechanical engineering complex of Russia requires the application of new industry process management technologies. In this regard, we consider the technologies of the logistic approach associated with reducing the costs distribution in material resource flow management. One of these technologies is applying of logistics outsourcing system into the external logistics system of mechanical engineering enterprises.
Identification of logical patterns for classification of EEE in space application
Authors: Masich I S , Orlov V I 
Published: June 2019

Abstract
The study deals with evaluation of reliability of onboard equipment on the basis of the additional screening tests and the estimated factory tests. In addition to using a statistical approach to solve this problem, the interest is a method for estimating the reliability of onboard equipment using machine learning and data mining methods. Due to the specifics of the task, it is proposed to use classification algorithms based on rules (logical classification algorithms).
Reproduction of innovative potential as a result of rocket-space industry enterprises innovative activity
Authors: Erygin Y V , Erygina L V , Votintsev R V , Shumakov F P 
Published: June 2019

Abstract
The strategic significance of the output products defines advantage of innovative rocket-space industry activity. In order to implement such an activity innovation potential is needed. Its formation is carried out both on the basis of resource and strategic approaches. There appear difficulties connected with the specific aspects of rocket-space industry enterprises in the course of innovative activity determination. Permanent changes of external and internal conditions cause changes of goal-setting and requirements to innovative potential. The research reproduction of innovative potential as a criterion will allow defining current efficiency of rocket-space industry enterprises innovative activity.
Plasma Aldosterone After Seated Saline Infusion Test Outperforms Captopril Test at Predicting Clinical Outcomes After Adrenalectomy for Primary Aldosteronism
Authors: Wu Che-Hsiung , Wu Vincent , Yang Ya-Wen , Lin Yen-Hung , Yang Shao-Yu , Lin Po-Chih , Chang Chin-Chen , Tsai Yao-Chou , Wang Shuo-Meng ,   TAIPAI group, Wu Vin-Cent , Wu Che-Hsiung , Hu Ya-Hui , Kiaw Leay , Chang Chia-Hui , Chang Ya-Li , Tsai Yao-Chou , Yu Chih-Chin , Lin Yen-Hung , Chan Chieh-Kai , Lin Jui-Hsiang , Wang Wei-Jie , Ho Yi-Luwn , Chang Hung-Wei , Lin Lian-Yu , Hu Fu-Chang , Chang Chin-Chen , Liu Kao-Lang , Wang Shuo-Meng , Huang Kuo-How , Jeff Chueh Shih-Chieh , Liao Shih-Cheng , Lu Ching-Chu , Yen Ruoh-Fang , Wu Kwan-Dun 
Published: June 2019

Abstract

OBJECTIVE
The saline infusion test (SIT) and the captopril test (CT) are widely used as confirmatory tests for primary aldosteronism (PA). We hypothesized that post-SIT and post-CT plasma aldosterone concentrations (PAC) indicate the severity of aldosterone-producing adenoma (APA) and might predict clinical outcome.

METHODS
We recruited 216 patients with APA in the Taiwan Primary Aldosteronism Investigation (TAIPAI) registry who received both seated SIT and CT as confirmatory tests. The data of 143 patients who underwent adrenalectomy with complete follow-up after diagnosis were included in the final analysis. We determined the proportion of patients achieving clinical success in accordance with the Primary Aldosteronism Surgical Outcome consensus. Logistic regression analysis was conducted to identify preoperative factors associated with cure of hypertension.

RESULTS
Complete clinical success was achieved in 48 (33.6%) patients and partial clinical success in 59 (41.2%) patients; absent clinical success was seen in 36 (25.2%) of 143 patients. Post-SIT PAC but not post-CT PAC was independently associated with clinical outcome. Higher levels of post-SIT PAC had a higher likelihood of clinical benefit (complete plus partial clinical success; odds ratio = 1.04 per ng/dl increase, 95% confidence interval = 1.01, 1.06; P = 0.004). Patients with post-SIT PAC &gt; 25 ng/dl were more likely to have a favorable clinical outcome after adrenalectomy. This cutoff value translated into a positive predictive value of 86.0%.

CONCLUSIONS
We suggest that post-SIT PAC is a better predictor than post-CT PAC for clinical success in PA post adrenalectomy.
Critical microRNAs and regulatory motifs in cleft palate identified by a conserved miRNA–TF–gene network approach in humans and mice
Authors: Li Aimin , Jia Peilin , Mallik Saurav , Fei Rong , Yoshioka Hiroki , Suzuki Akiko , Iwata Junichi , Zhao Zhongming 
Published: June 2019

AbstractCleft palate (CP) is the second most common congenital birth defect. The etiology of CP is complicated, with involvement of various genetic and environmental factors. To investigate the gene regulatory mechanisms, we designed a powerful regulatory analytical approach to identify the conserved regulatory networks in humans and mice, from which we identified critical microRNAs (miRNAs), target genes and regulatory motifs (miRNA–TF–gene) related to CP. Using our manually curated genes and miRNAs with evidence in CP in humans and mice, we constructed miRNA and transcription factor (TF) co-regulation networks for both humans and mice. A consensus regulatory loop (miR17/miR20a–FOXE1–PDGFRA) and eight miRNAs (miR-140, miR-17, miR-18a, miR-19a, miR-19b, miR-20a, miR-451a and miR-92a) were discovered in both humans and mice. The role of miR-140, which had the strongest association with CP, was investigated in both human and mouse palate cells. The overexpression of miR-140-5p, but not miR-140-3p, significantly inhibited cell proliferation. We further examined whether miR-140 overexpression could suppress the expression of its predicted target genes (BMP2, FGF9, PAX9 and PDGFRA). Our results indicated that miR-140-5p overexpression suppressed the expression of BMP2 and FGF9 in cultured human palate cells and Fgf9 and Pdgfra in cultured mouse palate cells. In summary, our conserved miRNA–TF–gene regulatory network approach is effective in detecting consensus miRNAs, motifs, and regulatory mechanisms in human and mouse CP.