bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical modeling of the loading process dump truck
Authors: Baryshnikov Yu N , Panshina A V 
Published: December 2020

Abstract
The article solves the problem of the impact of the load when loading a dump truck. The car is modeled by a rigid beam on two elastic supports of different stiffness with shock absorbers. The impact of the load is absolutely inelastic in the center of mass of the beam. The mathematical model of the car is based on the Lagrange equations of the 2nd kind in the form of a system of two inhomogeneous linear differential equations of small oscillations of the Beam-Load system. An analytical solution of this system is obtained in the form of the sum of two damped main oscillations, and expressions are obtained for the conditional amplitudes and phase shifts of the main oscillations, taking into account the initial conditions determined by the impact of the load. Based on the results obtained, an algorithm and a program for solving the problem were developed. A numerical experiment was performed on loading a BelAZ-7555B dump truck.
Walking wheel
Authors: Lapshin V V 
Published: December 2020

Abstract
The dynamics of a 2D walking wheel motion down an inclined plane is analytically investigated in nonlinear formulation. It is the simplest model of a bipedal walking. The possible cases of the motion of the walking wheel are investigated at various values of the inclination of the support surface and the initial angular velocity of the wheel. It is shown that various modes of motion of the walking wheel are possible. The most interesting of which is the existence of a stable periodic solution (self-oscillations).
Effect of a floating particles layer on breaking surface gravity waves
Authors: Kalinichenko V A 
Published: December 2020

Abstract
The results of experiments on the influence of a layer of particles of positive buoyancy on the suppression of the breaking process and the regularization of a standing gravity wave on a free surface of water in a rectangular vessel are discussed. The oscillations of a two-layer system in a barotropic mode are considered. Parametric resonance is used to excite the waves in a rectangular vessel. The effect of increase in the upper layer thickness on the limit steepness of the regular wave and its dissipative properties are considered. It is shown that the use of floating polystyrene particles as the upper layer changes significantly wave mode dynamics, namely, regularization of waves with complete suppression of breaking mechanisms.
A compact, modular and low-cost Internet of Things (IoT) platform for air quality monitoring in urban areas
Authors: Spandonidis Christos , Tsantilas Stefanos , Sedikos Elias , Galiatsatos Nektarios , Giannopoulos Fotios , Papadopoulos Panagiotis , Demagos Nikolaos , Reppas Dimitrios , Giordamlis Christos 
Published: December 2020

Abstract
The recent emergence of low-cost sensor technologies, measuring various air pollutants, enables the real-time collection of air pollution data, with high spatio-temporal resolution. In our recent study, we developed and deployed low-cost air quality monitoring sensors and distributed them to citizens of Thessaloniki, Greece. The aim of this study was to provide near real-time air pollution measurements that will allow the better representation of the air pollution levels in the greater area of Thessaloniki. In the current work, we present the low-cost adjustable wireless sensor platform that has been developed for air pollution monitoring in urban areas. The platform can take sensor measurements down to one sample per second and is suitable for Big Data analysis applications such as air quality forecasts, weather forecasts and traffic prediction. The paper aims to contribute to the area of low-cost, distributed sensor networks for Environmental Intelligence applications.
Design of a Dual-Band Planar Inverted F-L Implantable Antenna for Biomedical Applications
Authors: Salama Sanaa , Zyoud Duaa , Abuelhaija Ashraf 
Published: December 2020

Abstract
In this paper, a dual-band planar inverted F-L implantable antenna, which operates at theMedical Implant Communications Services (MICS) and Industrial, Scientific, and Medical (ISM) bands, is introduced. The proposed antenna is printed on RO3010 substrate of thickness 2mm, relative permittivity 10.2, and loss tangent 0.0023. A short-circuit pin inserted between the ground plane and the patch is used to downsize the antenna. The dimension of the antenna is 27 × 19 × 2 mm3. The proposed implantable antenna covers a frequency band of 9.4 MHz [397-406.4 MHz] at MICS band with a return loss of -20.02dB at 403 MHz and a frequency band of 80 MHz [2.41-2.49 GHz] at ISM band with a return loss of -22.82 at 2.45 GHz. Design and analysis of the proposed antenna is carried out by Computer Simulation Technologies (CST) Microwave studio.
Deposition of heat-resistant coatings based on the ZrSi2-MoSi2-ZrB2 system for protection of non-metallic composite materials in high-speed high-enthalpy gas flows
Authors: Lifanov I P , Astapov A N , Terentieva V S 
Published: December 2020

Abstract
The work demonstrates possibility of formation of coatings based on the ZrSi2-MoSi2-ZrB2 system by the slip-firing method. During oxidation, the coatings form heterogeneous oxide film resistant to high-speed high-enthalpy gas flow due to generation of refractory ZrO2 framework filled with borosilicate glass doped with zirconium dissolved in it. The advantages and disadvantages of the coatings in the system under study are presented.
Characteristics of the modification of the near-surface layer and sputtering of graphite under high intensity ion irradiation
Authors: Puntakov N A , Begrambekov L B , Grunin A V 
Published: December 2020

Abstract
In this paper, features of the modification of near-surface layer of R6510P100D01 grade graphite under irradiation by deuterium and helium ions at a temperature of 2050 °C is investigated. It is shown that irradiation by such ions at a flux density of 1,4×1018 ion/cm2s initiates vacancy transport from the irradiated surface to the bulk of the sample, leading to the formation of a porous layer inside the sample with a thickness of over 2 mm. High sputtering yields, exceeding those for irradiation by the same ions at room temperature with a moderate intensity ion fluxes, lead to the conclusion that in these conditions, sublimation is the main mechanism of the removal of carbon atoms from the surface of graphite.
Study on improving the efficiency of cleaning the pile drum
Authors: Ulugmuradov H Yu , Abbazov I Z , Muradov R M 
Published: December 2020

Abstract
This article provides an analysis of current news about the development of the cotton industry in the country. It is also based on theoretical research and analysis of cleaning processes used in foreign countries, as well as ways to improve the efficiency of cleaning the pile drum, which is the main working body of equipment for cleaning cotton from small impurities. It is based on the need for theoretical calculations of its cleaning surface to increase the cleaning efficiency of fine-grained cleaning equipment. The results of theoretical research on the calculation of useful surfaces of mesh surfaces based on the calculation of the surface of the pile and the mesh located at the bottom, which are currently used in the republic and abroad. The need to develop new structures and their calculations were made to increase the use of mesh surfaces up to 100%.
Bantu-speaker migration and admixture in southern Africa
Authors: Choudhury Ananyo , Sengupta Dhriti , Ramsay Michele , Schlebusch Carina 
Published: December 2020

Abstract
The presence of Early and Middle Stone Age human remains and associated archeological artifacts from various sites scattered across southern Africa, suggests this geographic region to be one of the first abodes of anatomically modern humans. Although the presence of hunter-gatherer cultures in this region dates back to deep times, the peopling of southern Africa has largely been reshaped by three major sets of migrations over the last 2000 years. These migrations have led to a confluence of four distinct ancestries (San hunter-gatherer, East-African pastoralist, Bantu-speaker farmer and Eurasian) in populations from this region. In this review, we have summarized the recent insights into the refinement of timelines and routes of the migration of Bantu-speaking populations to southern Africa and their admixture with resident southern African Khoe-San populations. We highlight two recent studies providing evidence for the emergence of fine-scale population structure within some South-Eastern Bantu-speaker groups. We also accentuate whole genome sequencing studies (current and ancient) that have both enhanced our understanding of the peopling of southern Africa and demonstrated a huge potential for novel variant discovery in populations from this region. Finally, we identify some of the major gaps and inconsistencies in our understanding and emphasize the importance of more systematic studies of southern African populations from diverse ethnolinguistic groups and geographic locations.
Safety and efficacy of omadacycline by BMI categories and diabetes history in two Phase III randomized studies of patients with acute bacterial skin and skin structure infections
Authors: Pai Manjunath P , Wilcox Mark H , Chitra Surya , McGovern Paul C 
Published: December 2020

Abstract

Objectives
The objectives of this post-hoc analysis were to examine the safety and efficacy of omadacycline by BMI categories and diabetes history in adults with acute bacterial skin and skin structure infections (ABSSSI) from two pivotal Phase III studies.

Patients and methods
OASIS-1 (ClinicalTrials.gov identifier NCT02378480): patients were randomized 1:1 to IV omadacycline or linezolid for 7–14 days, with optional transition to oral medication. OASIS-2 (ClinicalTrials.gov identifier NCT02877927): patients received once-daily oral omadacycline or twice-daily oral linezolid for 7–14 days. Early clinical response (ECR) was defined as ≥20% reduction in lesion size 48–72 h after the first dose. Clinical success at post-treatment evaluation (PTE; 7–14 days after the last dose) was defined as symptom resolution such that antibacterial therapy was unnecessary. Safety was assessed by treatment-emergent adverse events and laboratory measures. Between-treatment comparisons were made with regard to WHO BMI categories and diabetes history.

Results
Patients were evenly distributed among healthy weight, overweight and obese groups. Clinical success for omadacycline-treated patients at ECR and PTE was similar across BMI categories. Outcomes by diabetes status were similar in omadacycline- and linezolid-treated patients: at ECR, clinical success rates were lower for those with diabetes; at PTE, clinical success was similar between treatment groups regardless of diabetes history. The safety of omadacycline and linezolid was largely similar across BMI groups and by diabetes history.

Conclusions
Omadacycline efficacy in patients with higher BMI and in patients with diabetes was consistent with results from two pivotal Phase III ABSSSI trials. Fixed-dose omadacycline is an appropriate treatment for ABSSSI in adults regardless of BMI.
The cytosolic invertase NI6 affects vegetative growth, flowering, fruit set, and yield in tomato
Authors: Coluccio Leskow Carla , Conte Mariana , del Pozo Talia , Bermúdez Luisa , Lira Bruno Silvestre , Gramegna Giovanna , Baroli Irene , Burgos Estanislao , Zavallo Diego , Kamenetzky Laura , Asís Ramón , Gonzalez Mauricio , Fernie Alisdair Robert , Rossi Magdalena , Osorio Sonia , Carrari Fernando 
Published: December 2020

Abstract
Sucrose metabolism is important for most plants, both as the main source of carbon and via signaling mechanisms that have been proposed for this molecule. A cleaving enzyme, invertase (INV) channels sucrose into sink metabolism. Although acid soluble and insoluble invertases have been largely investigated, studies on the role of neutral invertases (A/N-INV) have lagged behind. Here, we identified a tomato A/N-INV encoding gene (NI6) co-localizing with a previously reported quantitative trait locus (QTL) largely affecting primary carbon metabolism in tomato. Of the eight A/N-INV genes identified in the tomato genome, NI6 mRNA is present in all organs, but its expression was higher in sink tissues (mainly roots and fruits). A NI6-GFP fusion protein localized to the cytosol of mesophyll cells. Tomato NI6-silenced plants showed impaired growth phenotype, delayed flowering and a dramatic reduction in fruit set. Global gene expression and metabolite profile analyses of these plants revealed that NI6 is not only essential for sugar metabolism, but also plays a signaling role in stress adaptation. We also identified major hubs, whose expression patterns were greatly affected by NI6 silencing; these hubs were within the signaling cascade that coordinates carbohydrate metabolism with growth and development in tomato.
Insights into synthesis and function of KsgA/Dim1-dependent rRNA modifications in archaea
Authors: Knüppel Robert , Trahan Christian , Kern Michael , Wagner Alexander , Grünberger Felix , Hausner Winfried , Quax Tessa E F , Albers Sonja-Verena , Oeffinger Marlene , Ferreira-Cerca Sébastien 
Published: December 2020

Abstract
Ribosomes are intricate molecular machines ensuring proper protein synthesis in every cell. Ribosome biogenesis is a complex process which has been intensively analyzed in bacteria and eukaryotes. In contrast, our understanding of the in vivo archaeal ribosome biogenesis pathway remains less characterized. Here, we have analyzed the in vivo role of the almost universally conserved ribosomal RNA dimethyltransferase KsgA/Dim1 homolog in archaea. Our study reveals that KsgA/Dim1-dependent 16S rRNA dimethylation is dispensable for the cellular growth of phylogenetically distant archaea. However, proteomics and functional analyses suggest that archaeal KsgA/Dim1 and its rRNA modification activity (i) influence the expression of a subset of proteins and (ii) contribute to archaeal cellular fitness and adaptation. In addition, our study reveals an unexpected KsgA/Dim1-dependent variability of rRNA modifications within the archaeal phylum. Combining structure-based functional studies across evolutionary divergent organisms, we provide evidence on how rRNA structure sequence variability (re-)shapes the KsgA/Dim1-dependent rRNA modification status. Finally, our results suggest an uncoupling between the KsgA/Dim1-dependent rRNA modification completion and its release from the nascent small ribosomal subunit. Collectively, our study provides additional understandings into principles of molecular functional adaptation, and further evolutionary and mechanistic insights into an almost universally conserved step of ribosome synthesis.
Phytoplankton RNA/DNA and 18S rRNA/rDNA ratios in a coastal marine ecosystem
Authors: Casabianca Silvia , Capellacci Samuela , Ricci Fabio , Scardi Michele , Penna Antonella 
Published: December 2020

AbstractThe RNA/DNA ratio is used as indicator of growth in various marine organisms and to assess physiological status at species or community level. To evaluate the utility of the RNA/DNA ratio as a proxy of phytoplankton primary production, the relationships between phytoplankton RNA/DNA, taxon-specific diatom and dinoflagellate 18S rRNA/rDNA ratios and autotrophic phytoplankton biomass were investigated as a first step. Significant correlations between all phytoplankton ratios and total phytoplankton, diatom and dinoflagellate biomass as chlorophyll a (chl a) and carbon content were found. Diatoms showed higher correlation than dinoflagellates (18S rRNA/rDNA vs. chl a, rs = 0.74 and 0.64, P &lt; 0.001; 18S rRNA/rDNA vs. carbon, rs = 0.66 and 0.53, P &lt; 0.001, respectively), because they represented the most abundant and frequent group within sampled assemblages. Further, phytoplankton biomass production is known to be linked to protein biosynthesis and significant relationships between RNA/DNA ratios and protein content of phytoplankton assemblage were found (rs = 0.62 and 0.52, P &lt; 0.001 for diatom and dinoflagellates, respectively). As taxon-specific RNA/DNA ratios were correlated with biomass and protein content, our results can be regarded as the first step toward further studies on the applicability of RNA/DNA ratios as indicators of growth rate and primary production in phytoplankton assemblages.
“Fight or flight”: coping responses to brand hate
Authors: Bayarassou Oula , Becheur Imene , Valette-Florence Pierre 
Published: December 2020

Purpose
This study aims to investigate the interplay between brand and consumer personalities in shaping brand hate and its consequences. More specifically, it investigates the relationship between fallacious character of the brand, brand betrayal feelings and brand hate, and identifies two response routes leading to consumer avoidance and revenge. Furthermore, the study explores the moderating impact of narcissism on the relationships between brand hate and its outcomes.

Design/methodology/approach
Data are collected from an online survey of a French representative consumer panel where participants were asked to cite a particular brand they hate, and then assess the different constructs tested in the model. Partial least squares structural equation modeling was used for data analysis.

Findings
The study sheds light on the possible mediators and moderators of brand hate. Particularly, brand betrayal is hypothesized as a mediator between fallacious character of the brand and brand hate. Moreover, the study assesses the impact of narcissism on the relationship between brand hate and desire for avoidance and revenge. Findings show that active brand hate leads to a desire for revenge, whereas passive brand hate positively influences desire for avoidance. Finally, the current research suggests that consumer narcissism fuels desire for revenge on the brand.

Originality/value
To the authors’ knowledge, this study is the first to integrate brand personality (the fallacious character of the brand) and consumer personality (narcissism). The study describes the mechanism through which brand transgressions activate two response routes to brand hate associated with the desires for revenge and avoidance.
eWOM credibility: a comprehensive framework and literature review
Authors: Verma Deepak , Dewani Prem Prakash 
Published: December 2020

PurposeThe purpose of this paper is to provide a comprehensive review on electronic word-of-mouth (eWOM) credibility. Further, the authors propose a comprehensive and integrated model on eWOM credibility.Design/methodology/approachThe authors conducted a systematic review of the extant literature on marketing, sociology and psychology to identify the factors that affect eWOM credibility. Further, the authors developed themes and identified factors which lead to eWOM credibility.FindingsFour factors were identified, i.e. content, communicator, context and consumer, which affect eWOM credibility. Several variables associated with these four factors were identified, which result in eWOM credibility. Further, the authors developed 22 propositions to explain the causal relationship between these variables and eWOM credibility.Research limitations/implicationsThe conceptual model needs empirical validation across various eWOM platforms, i.e. social networking websites, e-commerce websites, etc.Practical implicationsManagers and e-commerce vendors can use these inputs to develop specific design elements and assessment tools which can help consumers to identify credible eWOM messages. Credible eWOM messages, in turn, will increase the “trust” and “loyalty” of the customers on e-commerce vendors.Originality/valueThis paper provides a conclusive takeaway of eWOM credibility literature by integrating multiple perspectives and arguments from the extant literature. This study also presents an integrated model, which provides a theoretical framework for researchers to further examine the interaction effect of various variables, which results in eWOM credibility.Peer reviewThe peer review history for this article is available at: https://publons.com/publon/10.1108/OIR-06-2020-0263
Understanding motivations to use online streaming services: integrating the technology acceptance model (TAM) and the uses and gratifications theory (UGT)
Authors: Camilleri Mark Anthony , Falzon Loredana 
Published: December 2020

Purpose
The outbreak of the Coronavirus (COVID-19) pandemic and its preventative social distancing measures have led to a dramatic increase in subscriptions to paid streaming services. Online users are increasingly accessing live broadcasts, as well as recorded video content and digital music services through internet and mobile devices. In this context, this study aims to explore the individuals’ uses and gratifications from online streaming technologies during COVID-19.

Design/methodology/approach
This research has adapted key measures from the “technology acceptance model” (TAM) and from the “uses and gratifications theory” (UGT) to better understand the individuals’ intentions to use online streaming technologies. A structural equations partial least squares’ confirmatory composite approach was used to analyze the gathered data.

Findings
The individuals’ perceived usefulness and ease of use of online streaming services were significant antecedents of their intentions to use the mentioned technologies. Moreover, this study suggests that the research participants sought emotional gratifications from online streaming technologies, as they allowed them to distract themselves into a better mood and to relax in their leisure time. Evidently, they were using them to satisfy their needs for information and entertainment.

Research limitations/implications
This study contributes to the academic literature by generating new knowledge about the individuals’ perceptions, motivations and intentions to use online streaming technologies to watch recorded movies, series and live broadcasts.

Practical implications
The findings imply that there is scope for the providers of online streaming services to improve their customer-centric marketing by refining the quality and content of their recorded programs and through regular interactions with subscribers and personalized recommender systems.

Originality/value
This study integrates the TAM and UGT frameworks to better understand the effects of the users’ perceptions, ritualized and instrumental motivations on their intentions to continue watching movies, series and broadcasts through online streaming technologies, during COVID-19.
Stapler closure versus manual closure in total laryngectomy for laryngeal cancer: A systematic review and meta‐analysis
Authors: Lee Yi‐Chan , Fang Tuan‐Jen , Kuo I‐Chun , Tsai Yao‐Te , Hsin Li‐Jen 
Published: December 2020

AbstractObjectiveTotal laryngectomy (TL) is a life‐saving procedure for individuals with advanced laryngeal cancer and those suffering from recurrence after initial treatment. The present study aimed to evaluate the differences between stapler closure (SC) and manual closure (MC) of the pharynx during TL for patients with laryngeal cancer.Design/SettingA systematic literature search was performed using the PubMed, EMBASE and Cochrane Library databases. The data were analysed using Comprehensive Meta‐Analysis software (Version 3; Biostat). Dichotomous data were calculated as odds ratios (ORs), and continuous data were calculated as mean differences (MD) with 95% confidence intervals (CI).Main Outcome/ResultsA total of seven studies (535 patients) were included in this meta‐analysis. Pooled analysis showed that the operative time of TL was significantly reduced in the SC group (MD, −63.2; 95% CI, −106.0 to −20.4). Moreover, the SC group had a lower incidence of pharyngocutaneous fistula (OR = 0.38; 95% CI, 0.18 to 0.83; P = .016) and hospital stay (MD, −2.9; 95% CI, −5.6 to −0.1). The incidence of postoperative surgical site infection (OR = 0.41; 95% CI, 0.02 to 8.73; P = .565) was comparable between the two groups.ConclusionBased on these results, SC may be a useful option for patients who need TL.