bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gasification of Psidium guajava L. Waste Using Supercritical Water: Evaluation of Feed Ratio and Moderate Temperatures
Authors: González-Arias Sandro , Zúñiga-Moreno Abel , García-Morales Ricardo , Elizalde-Solis Octavio , Verónico-Sánchez Francisco J. , Flores-Valle Sergio O. 
Published: April 2021

Biomass waste, as raw material for renewable energy, is an attractive alternative since it does not compete with human food supply. An emerging alternative for its treatment is supercritical water gasification (SCWG), due to the high moisture content of some types of biomass. On this regards, guava fruit (Psidium guajava L.) is one of the most wasted agro-food products in Mexico. This motivated us to evaluate gasification of guava waste on dry biomass base under supercritical water conditions for the first time, with the aim of analyzing the impact of moderate temperatures and feed ratios as reaction parameters on gas products. Temperature was varied in the range of 673.15–773.15 K and using a batch reactor loaded with biomass:water (B:W) mass ratios of 1:1, 1:4, and 1:6. Furthermore, the obtained solid, liquid, and gas phase products were characterized. Hydrogen (H2), carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), ethane (C2H6), propane (C3H8), and butane (C4H10) were identified in gas phase and quantified by means of a gas chromatograph equipped with a TCD detector. Liquid and solid phase products were subjected to Fourier Transform Infrared spectroscopy analyses. This preliminary research indicated that high temperature operation and high biomass:water mass ratio enhanced gas yields (mol/kg) of about 4.137 for CH4, 6.705 for CO2, and 7.743 for H2; whereas the selectivity and gas efficiency for hydrogen was 65.26% and 58.94%, respectively.
Actualización de gestión gerencial eficaz, a partir de la aplicación de nuevas herramientas financieras
Authors: Martínez Tibisay , Salavarría Aracelis 
Published: April 2021

El objetivo general de esta investigación es proponer la aplicación de herramientas de gestión gerencial eficaz, a través de los nuevos argumentos financieros. Como metodología, este estudio se caracteriza de campo con un nivel descriptivo y explicativo. Se aplicó un instrumento a todo el personal que labora en la organización. Una vez aplicado el instrumento, se procesó y analizó. De allí se partió a realizar la matriz DOFA, para diseñar el conjunto de herramientas a aplicar. Se concluyó que es vital para la organización consolidarse de y generar raíces en el mercado donde se desenvuelve, a través de las estrategias que conllevan gerencia eficaz y herramientas financieras, diseñadas para ellos.
ABSTRACT
The general objective of this research is to propose the application of effective managerial management tools, through the new financial arguments. As a methodology, this study is characterized in the field with a descriptive and explanatory level. An instrument was applied to all personnel working in the organization. Once the instrument was applied, it was processed and analyzed. From there, the SWOT matrix was created, to design the set of tools to be applied. It was concluded that it is vital for the organization to consolidate and generate roots in the market where it operates, through strategies that involve effective management and financial tools, designed for them.
Estrategias de gestión de tesorería en las pequeñas y medianas empresas del sector petroquímico
Authors: Díaz Emilio 
Published: April 2021

La investigación tuvo como objetivo analizar las estrategias de gestión de tesorería en las pequeñas y medianas empresas del sector petroquímico. La misma fue sustentada con una metodología de tipo descriptiva, bajo un diseño no experimental, transeccional y de campo. La población quedo constituida por seis empresas, vigentes y en ejecución dentro del complejo petroquímico del municipio Miranda. Para la recolección de la información se utilizó un instrumento, tipo cuestionario, conformado por trece ítems, con cinco opciones de respuestas. Para su validez se sometió al juicio de expertos. Para la confiabilidad, se empleó el Método Alfa de Cronbach, obteniéndose 0,96. Se tabularon los datos procediendo al análisis cuantitativo de frecuencias absolutas y relativas. Se resalta que los indicadores: flujo de cobros, flujo de pagos, posición fecha valor, previsiones de tesorería y funciones del tesorero se posicionaron en muy alta aplicación; sólo los depósitos a plazo fijo ostentaron alta aplicación.
ABSTRACT
The research aimed to analyze treasury management strategies in small and medium-sized companies in the petrochemical sector. It was supported by a descriptive methodology, under a non-experimental, transectional and field design. The population was made up of six companies, in force and in execution within the petrochemical complex of the Miranda municipality. To collect the information, an instrument, questionnaire type, consisting of thirteen items, with five response options was used. For its validity, it was submitted to expert judgment. For reliability, the Cronbach's Alpha Method was used, obtaining 0.96. The data were tabulated proceeding to the quantitative analysis of absolute and relative frequencies. It is highlighted that the indicators: collection flow, payment flow, value date position, treasury forecasts and treasurer functions were positioned in very high application; only fixed-term deposits held high application.
Investigation of SrSiO3:Ce crystals for scintillator application
Authors: Nakamura Fumiya , Kantuptim Prom , Nakauchi Daisuke , Kato Takumi , Kawaguchi Noriaki , Yanagida Takayuki 
Published: April 2021

Abstract
We developed SrSiO3:Ce crystals with different dopant concentrations of 0.5%, 1.0% and 2.0% using the floating zone method and investigated the scintillation and storage luminescence properties. Under X-ray irradiation, a broad emission band peaking at around 360 nm was observed in all the samples. The decay time constants were in the range of 33–34 ns, which were typical values for the 5d–4f transitions of Ce3+. The 1.0% and 2.0% Ce-doped samples showed a photoabsorption peak under 241Am 59.5 keV γ-rays and the light yield was 1200 and 1400 ph MeV−1, respectively. The results of pulse-height spectra and thermally-stimulated luminescence showed a complementary relationship between scintillation and ionizing-radiation-induced storage luminescence properties in Ce-doped SrSiO3.
An Opportunistic infection during stay home period in COVID 19 outbreak; Helicobacter Pylori
Authors: Aydin Mesut , Ozer Serhat , Dirik Yaren , Dulger Ahmet Cumhur 
Published: April 2021

Objective: Helicobacter pylori infection is a well-established risk factor for gastric cancer, which is more common in developing countries where poor sanitation and domestic overcrowding are common. We tried to analyze the impact of the pandemic on Helicobacter pylori infection during COVID 19 related curfew and stay-at-home order.
Material and Methods: Between 1-30 June 2020 (during stay-at-home order), a total of 172 dyspeptic patients who underwent upper gastrointestinal system endoscopy at our institution following stay-at-home order during COVID pandemic were included in this study along with a control group covering 192 dyspeptic patients who underwent endoscopy between 1-20 June 2019.
Results: When we analyzed gastric biopsy specimens, those who faced stay-at-home order had similar rates of intestinal metaplasia (22% versus 29%; p=0.15) and atrophic gastritis (24% versus 29%; p= 0.396) compared to recent year's data. On the other hand, the rate of H.pylori infection was higher compared to pre-COVID period (59% vs. 46%, p<0.05).
Conclusion: Domestic overcrowding during COVID 19 related stay-at-home order is a risk factor for H.pylori infection.
Decolonizing the training of engineers and scientists: The case of the Faculty of Physical Sciences and Mathematics at Universidad de Chile
Authors: Rodríguez-Seeger Claudia , Sáez-Hueichapan Doris , Fuenzalida-Artigas Alexandra , Ñancupil-Quirilao Ignacio , Lienqueo María Elena , Contreras-Painemal Carlos , Díaz-Alvarado Felipe 
Published: April 2021

Given current global crises, there is a need to move beyond the anthropocentric, reductionist and short-term vision of the world, imposed through the hegemony of Western culture. Are we still in time to change the prevailing hegemonic vision of the world and better address global crises and their local impacts? What is the role of intercultural higher education in this challenging task? We conceive this type of education for the training of future decision-makers, as well as scientists and technicians who must respond to current and future challenges in society. Therefore, we evaluate the contribution of the Indigenous Peoples Program (PPI) of the Faculty of Physical and Mathematical Sciences (FCFM) at Universidad de Chile (UCH). We conclude that the PPI opens up possibilities for intercultural training in the FCFM, which can contribute to changing the professional and scientific performance of its graduates, opening their minds to other cultures, worldviews, values and paradigms.
Keywords: Indigenous, Higher education, Interculturality, Indigenous communities, Discrimination
How to ite this article: Rodríguez-Seeger, C., Sáez-Hueichapan, D., Fuenzalida-Artigas, A., Ñancupil-Quirilao, I., Lienqueo, M.E., Contreras-Painemal, C. & Díaz-Alvarado, F. 2021. Decolonizing the training of engineers and scientists: the case of the Faculty of Physical Sciences and Mathematics at Universidad de Chile. Scholarship of Teaching and Learning in the South. 5(1): 87-106. DOI: 10.36615/sotls.v5i1.154.
This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
ANALYSIS OF THE EFFECTIVENESS OF SKILL TRAINING AND MOTIVATION ON THE GROWTH OF ENTERPRENEURIAL INTEREST ON MEMBERS OF SETIA BHAKTI WANITA EAST JAVA WOMEN COOPERATIVE
Authors: Suwangsih Iwang 
Published: April 2021

Abstract
The purpose of this study is to describe and analyze whether training skill or short course which had been done by woman cooperative can grow entrepreneurial interest on woman cooperative’s members. The sampling technique used was simple random sampling with a simple size of 100 respondents to formula Isaac and Michael. The variable is training skill, motivation and entrepreneurial interest. The result of this study concluded that training skill variable simultaneously and partially have significant effect on entrepreneurial interest of woman cooperative’s members.
FINANCIAL LITERACY AND FINANCIAL INCLUSION ON THE FINANCIAL PLANNING OF THE CITY OF PALEMBANG
Authors: Fitriah Wani 
Published: April 2021

The formulation of the problem in this study was is there the influence of financial literacy and financial inclusion on the financial planning of the people of Palembang. This study aimed to determine the influence of finacial literacy and finacial inclusion on the financial planning of the city of the Palembang. In this research used infinite population and the number of sample was 200 respondents. The data used in this study was primary data. The technique used for collecting the data was questionnaire. At the analysis stage used is qualitative data quantitative. The analysis technique used was the test instrument consisting of validity and reliability tests, while the data analysis techniques were descriptive and inferential statistics in the form of a classic assumption test (normality test and multicolliniarity test), multiple linear regression analysis, hypothesis testing (F test and t test ) and the coefficient of determination.
The results showed that based on the F test (together) for financial literacy and financial inclusion variables had a positive and significant effect on the financial planning of the people of Palembang. While the results of the t test (individually) the financial literacy variable had a positive and significant influence on the financial planning of the people of Palembang. While the financial inclusion variable had no influence and no significant on the financial planning of the Palembang city community.
Low-level laser irradiation in the comprehensive treatment of acute renal damage
Authors: Ryazantsev V. E. , Vlasov A. P. , Mashnin I. V. 
Published: April 2021

Background. The discussed topic is worth attracting attention because of its high mortality rate in patients with acute renal damage which is caused by urological and surgical diseases. The membrane-destructive component in damaged renal tissues is manifested with decreased glomerular filtration rate, increased endotoxin level and lipid aberrations. The standard infusion and antibacterial therapy does not fully compensate the severity of pathological changes.Purpose. To study the effectiveness of low-level laser irradiation at endotoxicosis and lipid metabolism indicators in acute renal damage in acute experimental peritonitis.Material and methods. Lipid peroxidation, membrane-destructive processes in renal tissues as well as lipid metabolism and endotoxicosis were studied in the experiment with dogs. The effectiveness of infusion and antibiotic therapy and combined therapy with laser light were compared.Basic results: the experiment has demonstrated that acute renal damage was caused by systemic inflammatory diseases of non-urological profile. The applied low-level laser irradiation (LLLI) promoted more rapid correction of pathological processes which were manifested with increased concentration of cholesterol esters, total phospholipids, phosphatidylserine; LLLI decreased levels of cholesterol, phosphatidylcholine, triacylglycerol, phosphatidylinositol, triacylglycerol, phosphatidylinositol, diacylglycerol, lysophospholipids, free fatty acids and endotoxicosis parameters.Conclusion: the obtained results reliably indicate a LLLI positive effect at the organism’s potentials to recover when LLLI is included into the comprehensive therapy (under experiment). This is evidently seen in the restoration of lipid component in elements of renal parenchyma and in the decrease of lipid peroxidation activity.
The influence of smoking on the functional state of microcirculation according to laser doppler flowmetry and clinical anamnestic data of patients with arterial hypertension
Authors: Streltsova N. N. , Vasiliev A. P. 
Published: April 2021

Background. Detailed study of the functional state of microcirculation in combination of arterial hypertension and tobacco smoking, as the most common and prognostically important risk factors for atherogenesis, will not only clarify pathogenetic effect of tobacco smoke on the terminal vascular bed, but also outline directions of active counteraction to it.Purpose. To study the effect of TS on the functional state of SM using laser Doppler flowmetry in patients with AH.Methods. 185 patients with stage 1,2 AH involved in the study were divided into 2 equivalent groups according to main clinical and laboratory data: group 1 – non-smokers (n = 134, mean age was 57.0 [50.0; 60.0]), group 2 – patients who smoke 1–1.5 packs of cigarettes per day (n = 51, mean age was 54.0 [48.0; 58.0]). Patients were prescribed short-acting antihypertensives drugs, which were used whenever required 5 days before the study. SM was investigated by laser Doppler flowmetry using occlusion test and amplitude-frequency spectrum analysis of hemoperfusion fluctuations.Results. Obtained data showed negative acute effect of ingredients of tobacco smoke on almost all structural elements of microhemocirculation. Revealed deviations are characterized by constriction of precapillary segment of microvascular bed with increase in myogenic tone and equal 3.1 units [2.6; 4.1] versus 2.3 units [1.7; 3.4] in the alternative group (p = 0.007), decrease in capillary blood flow from 4.5 units [3.5; 5.8] compared with the group of non-smokers – 5.2 units [4.0; 7.3] (p = 0.041), statistically significant intensification of arteriolar-venular blood flow with formation of venous congestion, limitation of dilated reserve of microcirculation.Conclusion. Tobacco smoking leads to significant microcirculation disorders that are projected onto changes in terminal vascular bed, inherent with AH, which significantly reduces the functional state of microcirculation, limits its reserve potential and promotes the development of tissue ischemia.
Following Up the Kepler Field: Masses of Targets for Transit Timing and Atmospheric Characterization
Authors: Jontof-Hutter Daniel , Wolfgang Angie , Ford Eric B. , Lissauer Jack J. , Fabrycky Daniel C. , Rowe Jason F. 
Published: April 2021

Abstract
We identify a set of planetary systems observed by Kepler that merit transit-timing variation (TTV) analysis given the orbital periods of transiting planets, the uncertainties for their transit times, and the number of transits observed during the Kepler mission. We confirm the planetary nature of four Kepler Objects of Interest within multicandidate systems. We forward-model each of the planetary systems identified to determine which systems are likely to yield mass constraints that may be significantly improved upon with follow-up transit observations. We find projected TTVs diverge by more than 90 minutes after 6000 days in 27 systems, including 22 planets with orbital periods exceeding 25 days. Such targets would benefit the most from additional transit-timing data. TTV follow-up could push exoplanet characterization to lower masses, at greater orbital periods and at cooler equilibrium temperatures than is currently possible from the Kepler data set alone. Combining TTVs and recently revised stellar parameters, we characterize an ensemble of homogeneously selected planets and identify planets in the Kepler field with large-enough estimated transmission annuli for atmospheric characterization with James Webb Space Telescope.
The Automatic Learning for the Rapid Classification of Events (ALeRCE) Alert Broker
Authors: Förster F. , Cabrera-Vives G. , Castillo-Navarrete E. , Estévez P. A. , Sánchez-Sáez P. , Arredondo J. , Bauer F. E. , Carrasco-Davis R. , Catelan M. , Elorrieta F. , Eyheramendy S. , Huijse P. , Pignata G. , Reyes E. , Reyes I. , Rodríguez-Mancini D. , Ruz-Mieres D. , Valenzuela C. , Álvarez-Maldonado I. , Astorga N. , Borissova J. , Clocchiatti A. , De Cicco D. , Donoso-Oliva C. , Hernández-García L. , Graham M. J. , Jordán A. , Kurtev R. , Mahabal A. , Maureira J. C. , Muñoz-Arancibia A. , Molina-Ferreiro R. , Moya A. , Palma W. , Pérez-Carrasco M. , Protopapas P. , Romero M. , Sabatini-Gacitua L. , Sánchez A. , Martín J. San , Sepúlveda-Cobo C. , Vera E. , Vergara J. R. 
Published: April 2021

Abstract
We introduce the Automatic Learning for the Rapid Classification of Events (ALeRCE) broker, an astronomical alert broker designed to provide a rapid and self-consistent classification of large etendue telescope alert streams, such as that provided by the Zwicky Transient Facility (ZTF) and, in the future, the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). ALeRCE is a Chilean-led broker run by an interdisciplinary team of astronomers and engineers working to become intermediaries between survey and follow-up facilities. ALeRCE uses a pipeline that includes the real-time ingestion, aggregation, cross-matching, machine-learning (ML) classification, and visualization of the ZTF alert stream. We use two classifiers: a stamp-based classifier, designed for rapid classification, and a light curve–based classifier, which uses the multiband flux evolution to achieve a more refined classification. We describe in detail our pipeline, data products, tools, and services, which are made public for the community (see https://alerce.science). Since we began operating our real-time ML classification of the ZTF alert stream in early 2019, we have grown a large community of active users around the globe. We describe our results to date, including the real-time processing of 1.5 × 108 alerts, the stamp classification of 3.4 × 107 objects, the light-curve classification of 1.1 × 106 objects, the report of 6162 supernova candidates, and different experiments using LSST-like alert streams. Finally, we discuss the challenges ahead in going from a single stream of alerts such as ZTF to a multistream ecosystem dominated by LSST.
Hubble Space Telescope UV and Hα Measurements of the Accretion Excess Emission from the Young Giant Planet PDS 70 b
Authors: Zhou Yifan , Bowler Brendan P. , Wagner Kevin R. , Schneider Glenn , Apai Dániel , Kraus Adam L. , Close Laird M. , Herczeg Gregory J. , Fang Min 
Published: April 2021

Abstract
Recent discoveries of young exoplanets within their natal disks offer exciting opportunities to study ongoing planet formation. In particular, a planet’s mass accretion rate can be constrained by observing the accretion-induced excess emission. So far, planetary accretion is only probed by the Hα line, which is then converted to a total accretion luminosity using correlations derived for stars. However, the majority of the accretion luminosity is expected to emerge from hydrogen continuum emission, and is best measured in the ultraviolet (UV). In this paper, we present HST/WFC3/UVIS F336W (UV) and F656N (Hα) high-contrast imaging observations of PDS 70. Applying a suite of novel observational techniques, we detect the planet PDS 70 b with signal-to-noise ratios of 5.3 and 7.8 in the F336W and F656N bands, respectively. This is the first time that an exoplanet has been directly imaged in the UV. Our observed Hα flux of PDS 70 b is higher by

than the most recent published result. However, the light curve retrieved from our observations does not support greater than 30% variability in the planet’s Hα emission in six epochs over a five month timescale. We estimate a mass accretion rate of

. Hα accounts for 36% of the total accretion luminosity. Such a high proportion of energy released in line emission suggests efficient production of Hα emission in planetary accretion, and motivates using the Hα band for searches of accreting planets. These results demonstrate HST/WFC3/UVIS’s excellent high-contrast imaging performance and highlight its potential for planet formation studies.
Precise Estimation of Source Intensity for Wide-field Telescopes with PSF Modeling
Authors: Sun Rongyu , Yu Shengxian , Jia Peng 
Published: April 2021

Abstract
Wide-field small aperture optical telescopes are widely used in large-scale surveys currently and they have made great contributions in a number of astronomical applications. However, specific challenges arise owing to the defects caused by the optical system, and the image quality and reduction precision are negatively affected. An innovative method is proposed to address these challenges and achieve a high-precision source intensity estimation. In implementation, first a dedicated pipeline is developed to investigate the point-spread function (PSF) components from large amounts of images, using principal component analysis. Then the PSF model that reveals the actual characteristics of the optical system is constructed based on the evaluation. Last the equations for centroid and intensity estimation are constructed and the results are obtained. A trial of observations is performed with a wide-field small aperture telescope, and a large number of raw images, as well as simulated images, are acquired to test the efficiency of our method. The intensity measurement is performed with our method and other common algorithms, including the modified moment, Gaussian fitting, and SExtractor. Based on the comparison it is demonstrated that our proposed method outperforms the others. The results indicate that our method explores the limitations of such a system and additional gains can be achieved in wider applications.