bluuebunny/crossref_metadata_2025_split huggingface dataset:
Radiocarbon Dating of Silica Sinter and Postglacial Hydrothermal Activity in the El Tatio Geyser Field
Authors: Munoz‐Saez Carolina , Manga Michael , Hurwitz Shaul , Slagter Silvina , Churchill Dakota M. , Reich Martin , Damby David , Morata Diego 
Published: May 2020

AbstractThe El Tatio geothermal field in the Chilean Altiplano contains hydrothermal silica sinter deposits overlaying glacial and volcanic units, providing an opportunity to constrain the timing of deglaciation and volcanic activity in an area with sparse absolute chronologies. We obtained 51 new radiocarbon ages and δ13C values on the organic material trapped in these sinter deposits. Based on the δ13C values, we exclude 29 samples for possible contamination with bacterial mats that incorporate old carbon. We infer that hydrothermal activity initiated ~27 ka ago and has been nearly continuous ever since. The ages of the oldest sinter deposits coincide with ages of moraines that stabilized after the most recent deglaciation. Whereas late Pleistocene sinters are broadly distributed in the field, Holocene deposits are found around active hydrothermal features. Although recent volcanism is absent in the vicinity of El Tatio, persistent hydrothermal discharge implies a long‐lived magmatic heat source.
Australian PyroCb Smoke Generates Synoptic‐Scale Stratospheric Anticyclones
Authors: Kablick G. P. , Allen D. R. , Fromm M. D. , Nedoluha G. E. 
Published: May 2020

AbstractFires in southeastern Australia produced at least 18 pyrocumulonimbus (pyroCb) between 29 December 2019 and 4 January 2020. The largest plumes from this event exhibited several previously undocumented phenomena in the stratosphere. These include (i) the generation of potential vorticity and anticyclonic circulations from absorptive aerosol heating, (ii) the formation of a vertical temperature anomaly dipole, (iii) the rapid ascent from the lowermost stratosphere (15–16 km) to altitudes above 31 km in less than 2 months, (iv) an unprecedented abundance of H2O and CO in the stratosphere, and (v) the displacement of background O3 and N2O from rapid ascent of air from the troposphere and lower stratosphere. Each of these phenomena is traced back to a 5‐day‐old stratospheric plume composed of a massive amount of aerosol and biomass burning gases from a pyroCb outbreak. Until now, there has been no documented evidence that pyroCb plumes can affect stratospheric winds.
Resolvability of the Centroid‐Moment‐Tensors for Shallow Seismic Sources and Improvements From Modeling High‐Frequency Waveforms
Authors: Hejrani Babak , Tkalčić Hrvoje 
Published: May 2020

AbstractShallow earthquakes in the depth range 0–30 km make up more than 60% of all world's earthquakes. However, resolving their seismic source parameters such as the depth and moment tensor components presents a challenge. Here, we investigate the effect of frequencies higher than 0.025 Hz on centroid‐moment‐tensor inversion for the earthquakes occurring in the top 10 km of the Earth's crust. For a synthetic source located at the depth of 1 km, the maximum amplitude of ground motion due to a vertical dip‐slip mechanism from the waveforms filtered at 0.01–0.15 Hz is about 1,400 times larger than that filtered at 0.01–0.025 Hz. We quantify the effect of this dramatic difference and other waveform differences by introducing the “balance of amplitudes” and “waveform similarity” functions for different depths and frequencies. They present a simple and fast way to estimate the resolvability of seismic sources at a given depth and frequency band. For the 20 May 2016, Mw = 5.9 Petermann Ranges earthquake in Central Australia analyzed at 0.01–0.025 Hz, a high uncertainty accompanies the estimated source parameters. When the frequency band is 0.01–0.15 Hz, the centroid depth is well constrained at 1 km and the mechanism is a thrust fault striking ~314°N and dipping ~30°NE. These simulations require accurate Earth models. Our result, obtained at higher frequencies, is in a great agreement with various other studies that have been carried out for this earthquake and confirms a 20‐km long, shallow rupture.
Crustal Structure of the Greenland‐Iceland Ridge from Joint Refraction and Reflection Seismic Tomography
Authors: Yuan Xiaoyu , Korenaga Jun , Holbrook W. Steven , Kelemen Peter B. 
Published: May 2020

AbstractWe report a reanalysis of active‐source wide‐angle seismic data collected along the Greenland‐Iceland Ridge during the 1996 Seismic Investigation of the Greenland Margin (SIGMA) experiment. Interpreting the crustal structure of volcanic rifted margins has suffered from nonuniqueness because thick crust at the continent‐ocean transition may not be totally of igneous origin. In this regard, the Greenland‐Iceland Ridge presents a unique opportunity because, together with the Faroe‐Iceland Ridge, it is generally considered to constitute the Iceland hotspot track, and as such, the bulk of its crust may be considered to be of igneous origin. From 15 ocean‐bottom instruments deployed along a 290‐km‐long refraction transect, we collect 5,383 Pg and 1,118 PmP travel times, and we use joint refraction and reflection seismic tomography with adaptive importance sampling to invert them to construct a two‐dimensional compressional wave speed (Vp) model across the Greenland‐Iceland Ridge. Based on the covariation of crustal thickness and Vp, the western part of the transect may be almost entirely continental. Even the eastern part could include a significant fraction of preexisting continental crust. When considered together with the seismic structure of the Icelandic crust and its geochemical characteristics, our results suggest that the putative Iceland mantle plume could be considerably weaker than commonly assumed.
Adipocytes in hematopoiesis and acute leukemia: friends, enemies, or innocent bystanders?
Authors: Zinngrebe Julia , Debatin Klaus-Michael , Fischer-Posovszky Pamela 
Published: May 2020

AbstractThe bone marrow is home to well-balanced normal hematopoiesis, but also the stage of leukemia’s crime. Marrow adipose tissue (MAT) is a unique and versatile component of the bone marrow niche. While the importance of MAT for bone health has long been recognized, its complex role in hematopoiesis has only recently gained attention. In this review article we summarize recent conceptual advances in the field of MAT research and how these developments impact our understanding of MAT regulation of hematopoiesis. Elucidating routes of interaction and regulation between MAT and cells of the hematopoietic system are essential to pinpoint vulnerable processes resulting in malignant transformation. The concept of white adipose tissue contributing to cancer development and progression on the cellular, metabolic, and systemic level is generally accepted. The role of MAT in malignant hematopoiesis, however, is controversial. MAT is very sensitive to changes in the patient’s metabolic status hampering a clear definition of its role in different clinical situations. Here, we discuss future directions for leukemia research in the context of metabolism-induced modifications of MAT and other adipose tissues and how this might impact on leukemia cell survival, proliferation, and antileukemic therapy.
The intergenerational transmission of suicidal behavior: an offspring of siblings study
Authors: O’Reilly Lauren M. , Kuja-Halkola Ralf , Rickert Martin E. , Class Quetzal A. , Larsson Henrik , Lichtenstein Paul , D’Onofrio Brian M. 
Published: May 2020

AbstractWe examined the extent to which genetic factors shared across generations, measured covariates, and environmental factors associated with parental suicidal behavior (suicide attempt or suicide) account for the association between parental and offspring suicidal behavior. We used a Swedish cohort of 2,762,883 offspring born 1973–2001. We conducted two sets of analyses with offspring of half- and full-siblings: (1) quantitative behavior genetic models analyzing maternal suicidal behavior and (2) fixed-effects Cox proportional hazard models analyzing maternal and paternal suicidal behavior. The analyses also adjusted for numerous measured covariates (e.g., parental severe mental illness). Quantitative behavior genetic analyses found that 29.2% (95% confidence interval [CI], 5.29, 53.12%) of the intergenerational association was due to environmental factors associated with exposure to maternal suicidal behavior, with the remainder due to genetic factors. Statistical adjustment for parental behavioral health problems partially attenuated the environmental association; however, the results were no longer statistically significant. Cox hazard models similarly found that offspring were at a 2.74-fold increased risk [95% CI, 2.67, 2.83]) of suicidal behavior if their mothers attempted/died by suicide. After adjustment for familial factors and measured covariates, associations attenuated but remained elevated for offspring of discordant half-siblings (HR, 1.57 [95% CI, 1.45, 1.71]) and full-siblings (HR, 1.62 [95% CI, 1.57, 1.67]). Cox hazard models demonstrated a similar pattern between paternal and offspring suicidal behavior. This study found that the intergenerational transmission of suicidal behavior is largely due to shared genetic factors, as well as factors associated with parental behavioral health problems and environmental factors associated with parental suicidal behavior.
Research on a new type of buffering valve for vehicle shifting
Authors: Zhang Qihui , Xiong Wei , Ruan Jian , Lv Qingjun , Wang Zuwen 
Published: May 2020

The traditional buffering valve for vehicle shifting mainly relies on the throttle hole and spring to control the pressure in the clutch. However, its accommodative facility and adaption are inferior. Therefore, two–dimensional (2D) digital technology is proposed to be applied to the vehicle shift buffering area, and the 2D digital buffering valve is designed. This study introduces the structure and working principle of the 2D digital buffering valve and establishes the mathematical model of the 2D digital buffering valve. The classical proportional–integral–differential control algorithm is adopted and Matlab/Simulink is used to simulate its control model. Finally, an experimental study is carried out. The study results show that when the frequency is 50 Hz, the amplitude of the valve output pressure decays to −3 dB, and when the frequency is 60 Hz, the phase of the valve output pressure lags by 90°. The output of the 2D digital buffering valve meets the requirement of the change of the oil pressure in the clutch during the vehicle shifting process. The control precision of its buffering pressure characteristic reaches 15%. The simulation and test results of the buffering valve are consistent, which verifies the correctness of the simulation model.
More than recycled snippets of news
Authors: Pfurtscheller Daniel 
Published: May 2020

Abstract
Focusing on Facebook pages from public broadcasters in Austria, Germany, and Switzerland, this paper looks at ways
in which written quotations and snippets of news are reused and shared in social media posts. Drawing on recent theorization of
digital quotations as recontextualized discourse, the study deals with a specific genre of digital news: quote cards. The
qualitative analysis identifies common design patterns, examines the functions of quote cards and shows how text and image are
remixed and integrated into multimodal offerings, providing affordances for news-sharing practices and responses into political
discourses.
Health benefits of intermittent caloric restriction
Authors: Pan Yuanlong 
Published: May 2020

Abstract
Chronic diseases, including cardiovascular disease (CVD), diabetes, hypertension, stroke, dementia, and cancer are the leading cause of morbidity and mortality globally. Caloric restriction (CR) is able to reduce or prevent the above a mentioned chronic diseases and increase both healthy lifespan and longevity. However, it is not easy for people to practice CR. Therefore, it is essential to develop regimens that can achieve the benefits of CR without having to restrict overall daily caloric intake. One of the potential solutions is intermittent caloric restriction (ICR). The main advantage of ICR is that people or animals are hungry only intermittently, while people or animals are hungry all the time during CR. Therefore, it may be easier to practice ICR regimens than to restrict caloric intake daily. This review discusses the key benefits of ICR.
Numerical Solution of Magnetohydrodynamic Flow and Heat transfer of Sisko Fluid over an Exponential Stretching Sheet
Authors: Dadhich Yogesh , Jain Reema 
Published: May 2020

Abstract
The present work explores the numerical solution of magnetohydrodynamic (MHD) flow and heat transfer of Sisko fluid model over an exponential stretching surface. The flow is produced by the stretching of exponential surface in the presence of a uniform magnetic field. The governing equations are converted to nonlinear ordinary differential equations, using some appropriate dimensionless variables. The solution of the reduced nonlinear ordinary differential equations are found by numerical technique using bvp4c solver with MATLAB. The impact of various physical factors like magnetic parameter, material parameter, power law index & Prandtl number on the velocity and temperature profiles are shown graphically and elaborated.
Effect on structural and optoelectronic properties of Sn doping in MgSiP2-A DFT study
Authors: Khan K , Gaur A , Ahuja U , Soni A , Sahariya J 
Published: May 2020

Abstract
In the present paper, ab intio calculations of structural, band structure and optical properties of MgSi0.94Sn0.06P2 are studied within the framework of Density Functional Theory (DFT). The exchange correlation used to carry out all the calculations is Perdew-Burke-Ernzerhof Generalized Gradient Approximation (PBE-GGA) which is embodied in Wien2k code using Full Potential-Linear Augmented Plane Wave (FP-LAPW) method. The band structure, partial and total density of states (DOS) are computed for the supercell structure of MgSi0.94Sn0.06P2. The direct energy band gap (Eg) is found to be 1.36 eV which exhibits high optical absorption. It is observed that by adding a smaller percentage of Sn at Si Site in MgSiP2 chalcopyrite increases the band gap thus making it suitable for photovoltaic applications
Computer science development and technologies associated with industry 4.0 applied to industrial maintenance in Colombia
Authors: Dueñas Ramírez L M , Villegas López G A 
Published: May 2020

Abstract
The technologies associated with industry 4.0, have taken a leading role worldwide, because being globally competitive in the industrial sector depends not only on the real world but also on the digital world. This is why the predictive techniques used in maintenance and that currently employ technologies such as: internet of things, machine learning, big data, cyber physical Systems, Data analysis among others; to make their predictions they have defined a path in the continuous improvement of industrial processes and in the execution of the maintenance strategy. This work shows the most developed technologies 4.0 in Colombia used in industrial maintenance and exposes the country’s gaps in the development of these technologies and their use in different industrial sectors. This research was developed through the analysis of consolidated data in studies conducted by the private sector and the public in Colombia on technological developments in the country where it is evident that these technologies associated with maintenance are in growth stage and in a few sectors of industry have exploited the benefits of use.
Mobile and web technology to display notifications of academic events of the Universidad Francisco de Paula Santander by using the agile methodology for mobile development
Authors: Parada C J , Gómez C , Diaz N 
Published: May 2020

Abstract
The “Universidad Francisco de Paula Santander, Colombia” lacks a dynamic tool to give the academic community timely knowledge of events and information needs in an assertive manner and in a reasonable time. Based on the above and following the dissemination strategy designed by the “Centro de Comunicaciones y Medios Audiovisuales” to incorporate the use of technology to massify internal institutional information, is built the mobile application NotiUFPS for Android devices, which allows notifying all events that take place at the university, including the calendar of previous and academic calendar, with the compatibility of downloading information in pdf format. The application will make use of global positioning system, to send timely notifications and updated information of institutional events when the user is inside the university campus. NotiUFPS was developed using “Metodología Ágil para Dispositivos Móviles”, a methodology developed by the “Grupo de Investigación en Desarrollo e Ingeniería de Software, Universidad Francisco de Paula Santander, San José de Cúcuta, Colombia”, which consolidates development practices recognized as Scrum and XP.
Use of computer tools in small and medium-sized enterprises: Statistical model for the creation of financial value in the productive sectors
Authors: Jácome N J , Nolasco C , Hurtado-Lugo N A 
Published: May 2020

Abstract
This presents the use of computer tools for the evaluation of the generation of financial value of small and medium-sized enterprises in the municipality of Ocaña, department of Norte de Santander, Colombia. In this regard, since small and medium-sized enterprises are organizations that promote economic development, it became necessary, through the use of computer tools, to use a statistical model that evaluates in financial terms the value creation of the productive sectors. As a result, the research, using a descriptive and correlational methodology, established the computational tools to be used for the design of the statistical model, which will characterize the main determinants in the creation or destruction of value of the business structure by means of the variables of permanence, number of employees, and commercial activity. From the point of view of financial management, the financial structure was evaluated with the statistical model, establishing in terms of investment decisions, financing, and liquidity how these organizations are financially positioned; therefore, by means of statistical correlations, the relationship of dependence of financial management on the creation or destruction of value was determined.
Development of computer systems for urban mobility
Authors: Camargo M F , Rosado Gómez A A 
Published: May 2020

Abstract
The growth of cities generates displacement problems that need to be regulated and streamlined. An intelligent city uses technology in favor of citizens, automating everyday processes, through the use of electronic devices that capture, transmit and process information that allows them to make decisions, in the search to improve the quality of life of human beings in harmony with natural resources. This article presents a review of the research at the bibliographic level of the smart city concept focused on the urban mobility axis which allows knowing the technologies and processes of transition from conventional mobility to intelligent mobility where the actors of a city like vehicles, pedestrians are involved and public areas guaranteeing development and evolution in citizen services.
Learning mediated by technologies of information and communication at the basic, secondary and high-level education institutes
Authors: Calletana L B , Miguel R P , Jaime P G 
Published: May 2020

Abstract
The implementation of academic activities that involve new technologies of information and communication, it generates in the digital native (individual who has grown up immersed in digital technology) a significant academic perspective in the development of their skills; what leads to a learning mediated by technologies of information and communication, where these are tools used in the classroom that can contain digital documents, multimedia and even the use of reality increases; what has made the present project has a titanic impact on this educational transversality, where this type of learning leaves a mark impregnated with knowledge in each of the students. In addition, the activities implemented in the classroom means that students are interested in each subject taught and that knowledge flows spontaneously, achieving in this way the significant assimilation of knowledge and skills in any area of knowledge.
Oscillatory and asymptotic behavior of third order mixed type neutral difference equations
Authors: Kaleeswari S. 
Published: May 2020

Abstract
The aim of this paper is to study the oscillatory and asymptotic properties of the mixed type third order neutral difference equation of the form

Δ

(

a
n

Δ
2

(

x
n

+

b
n

x

n
−

r
1

+

c
n

x

n
+

r
2

)

)

+

q
n

x

n
+
1
−

σ
1

β

+

p
n

x

n
+
1
+

σ
2

β

=
0

. where β is the ratio of odd positive integers,

τ
1

,

τ
2

,

σ
1

and

σ
2

are non-negative integers. Examples are inserted to illustrate the main results.
Information system for decision-making support with resources allocation between geographically remote objects within a production association
Authors: Salih H S , Egorov S , Nemtinova Y , Nemtinov V 
Published: May 2020

Abstract
In this article, we discuss the issues of creating an information system for decision-making support for the task of resources rationing at geographically remote objects within a production association. The article contains the problem statement and the algorithm for solving the problem of redistributing quotas for production resources between separate remote objects (structural divisions) of a production association, settlement of payments between them, which allow reducing total costs for the entire association.
Functional model of barrel mixer of bulk solids
Authors: Teruchcov V , Chupshev A , Konovalov V , Rodionov Yu 
Published: May 2020

Abstract
The description of the researched barrel mixer with flat blades is carried out. Basing on experimental data, the authors have derived regression equations between barrel filling degree and drive power input and barrel capacity and angle of its setting, between coefficient of variation and mixing duration, between the share of the check component and barrel capacity and angle of its setting. An integrated functional model has been developed for the relationship between the main indicators of the mixer and the studied factors. Discrepancy between experimental data and calculated values of the functional model is about 15% of the calculated granularity of mixture. Inclination of the barrel at the angle of 15° to the horizontal is rational. Production of dry compound feed mixtures (with the density of 500-600 kg/m3) on farms in the existing small-capacitance mixers is irrational in view of long duration of mixing. Mixers need upgrading with the help of beaters’ construction change.
Using the hierarchical analysis method for decision making in a business activity
Authors: Zubkova T , Tagirova L 
Published: May 2020

Abstract
Information technology is widely used in all spheres of human activity. The choice of supplier for small businesses is one of the main tasks of the entrepreneur and has an impact on the success of his activities. For a solution of the problem of the choice of the supplier, this research proposes the use of an automated information system to implement and evaluate the characteristics of suppliers, as well as ranking them. As the mechanism of the choice of the best supplier use of a method of the analysis of hierarchies intended for a solution of problems of the choice of alternatives by means of their multicriteria rating is offered. The developed software system allows to keep records on the receipt, sale and characteristics of the goods, to carry out settlement operations and reporting documentation, as well as to select suppliers who meet all requirements of the entrepreneur, and as a result to conduct business at a higher quality level.