bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling of “Concentric Drum” Tilt Angle Model Based on Mechanical Analysis
Authors: Yang Zihao , Zhang Shiwei , Cheng Shanshan 
Published: March 2020

Abstract
“Concentric drums” is a group cooperation project, which requires better tacit understanding between the team members. At the same time, the force exerted on the rope can be accurately controlled, which contains a more complex mechanical relationship. In reality, it is impossible for the players to make force synchronously and the force is difficult to control accurately, which can be attributed to the following two situations: first, there is no situation in which the team has no force in advance but the size is not uniform when the force is applied, so the drum surface is at the level position at the moment when the players start to make force; second, there are individual players who make force in advance, and the strength of each player is different, resulting in the tilted of the drum surface when the players are exerting force. In the first case, the vertical component forces of two opposite members in the same straight line are combined into one force, then the moment of each resultant force is calculated and the vector sum is performed, the angular acceleration is solved according to the rigid body mechanics formula, and finally the tilt angle is calculated by using the time brought in by double integration. In the second case, firstly, consider that some members of the team will start the force ahead of time, and those members who do not start the force will be brought into the model of case I according to the force value of 0 to obtain tilt angle 1, Secondly, the force of the remaining team members is considered. At this time, based on the inclined plane, the force of each member after treatment is brought into the model of case I again to get the inclined angle tilt angle 2 caused by different forces. After two inclinations, three planes with different angles can be obtained. The angle between the final plane and the original plane can be calculated by using the space coordinate normal vector, that is, the bevel angle of horizontal inclination of the drum surface.
Mathematical model of increase in durability of road machines taking into account operating conditions
Authors: Zorin Vladimir , Tuan Le Tchong 
Published: March 2020

Abstract
In this article results of researches and development of a mathematical model of extension of a resource and increase in durability of the road machines functioning in tropical conditions of Vietnam taking into account operating conditions are considered. By means of the software of Matlab the original rated program of determination of optimum parameters of frequency of maintenance and repair is developed; the number of repairs and categories of maintenance which need to be carried out throughout all life cycle of the road machine for ensuring best values of indicators of durability of machines taking into account operating conditions.
The definition of force parameters when grinding materials with anisotropic texture pressure in the press roller unit
Authors: Romanovich A A , Amini E , Trishin P V , Chekhovskoy E I , Serebrennikov A S 
Published: March 2020

Abstract
The article deals with the issues of improving the efficiency of grinding materials with an anisotropic texture. The main specific features and conditions of the organization of the grinding process, including the conditions of loading materials with an anisotropic texture, the creating conditions of their directed motion and application of force load. The article explains the design of the press-roll unit (PRU) with a device for the directed supply of anisotropic materials is given, description its scheme and the process of work. The conditions of destruction of an anisotropic material between eccentrically mounted rolls are considered and an equation for the calculation of the specific force required for the destruction of anisotropic materials in eccentric rolls of PRU is obtained. The comparative data of values of specific values of crushing pressure at grinding of organogenic limestone obtained experimentally in PRU and by calculation are presented.
Risk factors affecting the implementation of construction projects in Iraq
Authors: Kim B G , Shakir Z N , Nasrulloeva R A 
Published: March 2020

Abstract
The construction industry of Iraq is widely associated with multiple influencing factors that due to their specific lead to increased uncertainty and multiple risks during the construction phase. The main objective of this article is to identify and evaluate key risk factors and their impact on the formation of car parks and the realisation construction projects in Baghdad (Iraq). In this study the risks associated with construction projects identified with the help of open questionnaire and interview with construction project specialists. In total, factors of risks were identified and categorized into five groups: financial, political, organizational, technical and legal. The study revealed that the top ten important risk factor are: inconsistency structure specifications(76.89%), changes in design(75.97%), late arrival of equipment and materials from the country of origin(75.74%), poor coordination between the client and the contractor(72.29%), lack of clarity in contractual obligations(71.17%), the occurrence of internal problems between the project parties(71.17%), dues payment delay not according to contract (68.09%), insufficient financial allocations to complete the project(66.37%), war (47.75%) and receipt of operational advances delay due to legal proceedings(46.58%).
A Study of the Characteristics of Electric Fuel Pumps of Automobile Engines
Authors: Gritsenko A , Shepelev V , Shubenkova K , Zemdikhanov M M , Gatiyatullin M H 
Published: March 2020

Abstract
The article considers theoretical and experimental research of the fuel system of motor-and-tractor engines: the change in the current consumption of an electric fuel pump (EFP) from the degree of contamination ε of series elements in the system and leakage in the injection unit of the EFP. The environmental friendliness and efficiency during operation of mobile energy resources is put first. According to some studies, currently, there are 43.5 millions of passenger cars in Russia, 29.2% of which do not comply with EURO-2 toxicity standards. Among light commercial vehicles, 42.9% do not comply with EURO-2 toxicity standards. Among trucks, 62.9% of vehicles neither comply with EURO-2 toxicity standards. The electric fuel pump combines electronic and hydraulic elements. According to the statistics of failures, most of them (up to 35%) fall at the electric motor. The main factors affecting failures of EFPs are: increased dustiness and humidity, water ingress into fuel, violation of maintenance intervals, etc.
Features of formation of gas-thermal coatings with equal thickness on flat surfaces
Authors: Belenkiy U I , Kretinin V I , Sokolova V A , Teppoev A V , Markov V A , Parfenopulo G K 
Published: March 2020

Abstract
The article deals with the formation of uniform gas thermal coatings on flat surfaces. It is substantiated that gas-thermal coatings are formed due to the superposition of single wavy stripes. The technique of obtaining uniform thermal coatings depends on spraying modes. The dependences of the speed of movement and supply of a gas-flame burner on the spraying distance are theoretically substantiated and experimentally confirmed. The dependence of coating thickness on the speed of a spraying device was determined.
The relationship of microrelief indicators of the friction surfaces of mobile interfaces of construction equipment
Authors: Gustov Y I , Sletov S Y , Shishkov P E 
Published: March 2020

Abstract
The paper presents the relationships of microrelief indicators of the friction surfaces of mobile interfaces of a hydraulic excavator equipment and passenger elevator. The authors use partial micro-wear and micrometall as initial indicators of microrelief. These indicators are used to determine important operational tribomechanical characteristics. The article proposes an approximating function of the curve of the reference lines for the entire domain of relative approaches.
Determination of rational cutting parameters while drilling intermediate by ring
Authors: Baranchik V P , Zakirov M F 
Published: March 2020

Abstract
The article analyzes the problem of reducing the cost of changing bits during deep drilling of directional wells due to the rational choice of operational parameters in the process of sinking rocks that alternate in strength. The authors propose a technology to control drilling parameters on the basis of preliminary information on the limits of rock strength over sections of the well, which allows to increase the bit flight and reduce the energy intensity of the drilling process.
Road safety strategies in the Russian Federation for 2018–2024 in Omsk Region
Authors: Simul M G , Porkhacheva S M 
Published: March 2020

Abstract
The paper explores the causes of accidents and ways to reduce their number through the use of targeted programs to improve traffic safety. The authors justify the choice of target indicators used in the development of such programs. The article gives an example of the development of a set of measures for one of the sections of Omsk city.
Modification of cement-bound mixtures with sodium formate additives for the construction of pavement bases at low air temperatures
Authors: Vdovin E A , Stroganov V F 
Published: March 2020

Abstract
The paper considers the influence of an antifrosty additive of sodium formate (SF) on the kinetics of hardening of cement-bound mixes (CBM) in the bases of road pavements at air temperatures from 00C to (-15) 0C with a cement content of 7.0% and 10.0%. The authors establish that the highest intensity of CBM hardening was noted in the first 7 days of hardening, at which the strength was 50-60% of the strength of the material at the age of 28 days. The SF modifier provides an increase in compressive strength (Rcs) of the material depending on the amount of additive and air temperature. The study makes it possible to establish the optimal consumption of SF for different temperature regimes of hardening of mixtures and at the indicated cement contents. The use of SF provides a 30% set of strength at a temperature not lower than (-5) °C. Modification of CBM with additives of SF provides the opportunity to increase the volume of construction of pavement foundations by performing work during periods of the year with lower air temperatures.
Development of transport infrastructure of urban mobility based on cable metro technology
Authors: Panfilov A V , Korotkiy A A , Panfilova E A , Lagerev I A 
Published: March 2020

Abstract
The article presents materials on the use of cable metro technology in a highly urbanized environment, as an improvement in urban mobility in the format of a smart city. The presented transport system is significantly different from the traditional cablecar, which is described in the comparative characteristics of each system. The article describes the principle of operation of the cable metro, based on the use of mechatronic motion modules.
Improving the quality of the investigation of a road traffic accident
Authors: Tikhomirov S I , Komarov Y Y , Volchkov V M 
Published: March 2020

Abstract
The article deals with the issue of improving the quality of auto expertise and as a result, with the issue of investigating road accidents. The main parameter used in the auto expertise is vehicle deceleration. But today we consider the characteristics of the roadway and the load of the car when decelerating a car. As for temperature factor it is not only ignored, but the possibility to take it into account doesn’t even exist. The impact of the ambient temperature on vehicle deceleration was studied. There was simulation of vehicle braking which physically justified the impact of ambient temperature. On the basis of the practical tests conducted, the dependence of vehicle deceleration on the ambient temperature was determined. This dependence will allow auto experts make calculations more objectively which will positively affect not only the course of road accident investigation but also the identification of factors conducive to development and emergence of the accident.
Comparison of various calculation models for the bridge dynamic analysis
Authors: Lang A V , Diachenko L K , Labutin N A 
Published: March 2020

Abstract
The purpose of this study is to determine the rational use areas of various computational models types while dynamic analysis. This topic is relevant because of the need to carry out precise dynamic calculations for structures at the high-speed rail, in order to ensure the design of a reliable structures. The object of the study is a single-span girder for the high-speed rail. Research methods are numerical analysis using various models; modal calculation of the oscillation shapes and frequencies; comparative analysis. The result of this study are recommendations on the areas of rational use of various types of models.
Beak coloration of starling (Sturnus unicolor) males depends on the length of their throat feathers
Authors: Azcárate-García Manuel , Ruiz-Rodríguez Magdalena , Ruiz-Castellano Cristina , Díaz-Lora Silvia , Tomás Gustavo , Martín-Vivaldi Manuel , Soler Juan José 
Published: March 2020

Abstract
Within the context of complex sexual signaling, most research has focused on exploring the associations between several signals and/or their relationships with different proxies of individual quality. However, very few studies have focused on checking whether the expression of one signal is conditioned by the expression of the others. Here, by experimentally shortening the throat feathers of male spotless starlings (Sturnus unicolor), we evaluated the influence of this trait on the color expression of the beak base. In addition, we tested the relationship between these two sexually dimorphic characters with traits indicating individual qualities, such as body condition and color reflectance at the wavelength related to carotenes in the tip of the beak. Our results show that the coloration of the beak base in males, but not in females, is positively related to body condition and to the length of ornamental throat feathers. Moreover, the experimental shortening of throat feathers in males had a negative effect on the blue chroma intensity of their beak base 1 year after manipulation. These results support for the first time a causal link between the expression of two sexually dimorphic characters, which is essential to understand their functionality in a multiple signaling framework.
GenMap: ultra-fast computation of genome mappability
Authors: Pockrandt Christopher , Alzamel Mai , Iliopoulos Costas S , Reinert Knut 
Published: March 2020

Abstract

Motivation
Computing the uniqueness of k-mers for each position of a genome while allowing for up to e mismatches is computationally challenging. However, it is crucial for many biological applications such as the design of guide RNA for CRISPR experiments. More formally, the uniqueness or (k, e)-mappability can be described for every position as the reciprocal value of how often this k-mer occurs approximately in the genome, i.e. with up to e mismatches.

Results
We present a fast method GenMap to compute the (k, e)-mappability. We extend the mappability algorithm, such that it can also be computed across multiple genomes where a k-mer occurrence is only counted once per genome. This allows for the computation of marker sequences or finding candidates for probe design by identifying approximate k-mers that are unique to a genome or that are present in all genomes. GenMap supports different formats such as binary output, wig and bed files as well as csv files to export the location of all approximate k-mers for each genomic position.

Availability and implementation
GenMap can be installed via bioconda. Binaries and C++ source code are available on https://github.com/cpockrandt/genmap.
ADFinder: accurate detection of programmed DNA elimination using NGS high-throughput sequencing data
Authors: Zheng Weibo , Chen Jing , Doak Thomas G , Song Weibo , Yan Ying 
Published: March 2020

Abstract

Motivation
Programmed DNA elimination (PDE) plays a crucial role in the transitions between germline and somatic genomes in diverse organisms ranging from unicellular ciliates to multicellular nematodes. However, software specific for the detection of DNA splicing events is scarce. In this paper, we describe Accurate Deletion Finder (ADFinder), an efficient detector of PDEs using high-throughput sequencing data. ADFinder can predict PDEs with relatively low sequencing coverage, detect multiple alternative splicing forms in the same genomic location and calculate the frequency for each splicing event. This software will facilitate research of PDEs and all down-stream analyses.

Results
By analyzing genome-wide DNA splicing events in two micronuclear genomes of Oxytricha trifallax and Tetrahymena thermophila, we prove that ADFinder is effective in predicting large scale PDEs.

Availability and implementation
The source codes and manual of ADFinder are available in our GitHub website: https://github.com/weibozheng/ADFinder.

Supplementary information
Supplementary data are available at Bioinformatics online.
Joint learning dimension reduction and clustering of single-cell RNA-sequencing data
Authors: Wu Wenming , Ma Xiaoke 
Published: March 2020

Abstract

Motivation
Single-cell RNA-sequencing (scRNA-seq) profiles transcriptome of individual cells, which enables the discovery of cell types or subtypes by using unsupervised clustering. Current algorithms perform dimension reduction before cell clustering because of noises, high-dimensionality and linear inseparability of scRNA-seq data. However, independence of dimension reduction and clustering fails to fully characterize patterns in data, resulting in an undesirable performance.

Results
In this study, we propose a flexible and accurate algorithm for scRNA-seq data by jointly learning dimension reduction and cell clustering (aka DRjCC), where dimension reduction is performed by projected matrix decomposition and cell type clustering by non-negative matrix factorization. We first formulate joint learning of dimension reduction and cell clustering into a constrained optimization problem and then derive the optimization rules. The advantage of DRjCC is that feature selection in dimension reduction is guided by cell clustering, significantly improving the performance of cell type discovery. Eleven scRNA-seq datasets are adopted to validate the performance of algorithms, where the number of single cells varies from 49 to 68 579 with the number of cell types ranging from 3 to 14. The experimental results demonstrate that DRjCC significantly outperforms 13 state-of-the-art methods in terms of various measurements on cell type clustering (on average 17.44% by improvement). Furthermore, DRjCC is efficient and robust across different scRNA-seq datasets from various tissues. The proposed model and methods provide an effective strategy to analyze scRNA-seq data.

Availability and implementation
The software is coded using matlab, and is free available for academic https://github.com/xkmaxidian/DRjCC.

Supplementary information
Supplementary data are available at Bioinformatics online.
Palmprint for Individual’s Personality Behavior Analysis
Authors: Prasad Shitala , Chai Tingting 
Published: March 2020

Abstract
Palmprint is an important key player in biometric family and also informs some extra basic personality details of an individual. In this paper, we utilize these extra information and designed an automated mobile vision (MV) system to extract principal lines from human palm and analyze them for behavioral significances. Hence, the main concern of this paper is to come up with a simple yet powerful low-level MV solution to extract the complex challenging features from palmprint. In the proposed system, the computational tasks are offloaded to a dedicated palmistry server and efficiently minimizes the energy consumption of mobile device after performing some preliminary computational low-level tasks. The implementation is divided into four major phases: (i) hand-image acquisition and pre-processing, (ii) region-of-interest extraction from the palm images, (iii) post-processing to extract principal lines and (iv) features computation for behavior analysis. The basic palmistry uses line lengths, angles, curves and branches to identify a person’s behavior. The exhaustive experiments show that the proposed system achieves an average accuracy of 96%, 92% and 84% for heart, life and head line detection and personality prediction, respectively. Finally, mapping the extracted results with the original palmprint is augmented back to the use for better visualization.
Impact of low health literacy on healthcare utilization in individuals with cardiovascular disease, chronic obstructive pulmonary disease, diabetes and mental disorders. A Danish population-based 4-year follow-up study
Authors: Friis Karina , Pedersen Marie Hauge , Aaby Anna , Lasgaard Mathias , Maindal Helle Terkildsen 
Published: March 2020

Abstract

Background
Previous research from the USA has shown that low health literacy is associated with higher hospitalization rates and higher rates of emergency service use. However, studies in a European context using more comprehensive health literacy definitions are lacking. The aim was to study the impact of low health literacy on healthcare utilization in a Danish context.

Methods
In this prospective cohort study, baseline survey data from 2013 were derived from a large Danish health and morbidity survey and merged with individual-level longitudinal register data for a 4-year follow-up period. The study included people in the general population (n = 29 473) and subgroups of people with four different chronic conditions: cardiovascular disease (CVD) (n = 2389), chronic obstructive pulmonary disease (COPD) (n = 1214), diabetes (n = 1685) and mental disorders (n = 1577).

Results
In the general population, low health literacy predicted slightly more visits to the general practitioner and admissions to hospital and longer hospitalization periods at 4 years of follow-up, whereas low health literacy did not predict planned outpatient visits or emergency room visits. In people with CVD, low health literacy predicted more days with emergency room visits. In people with mental disorders, difficulties in actively engaging with healthcare providers were associated with a higher number of hospital admission days. No significant association between health literacy and healthcare utilization was found for diabetes or COPD.

Conclusions
Even though Denmark has a universal healthcare system the level of health literacy affects healthcare use in the general population and in people with CVD and mental disorders.