bluuebunny/crossref_metadata_2025 huggingface dataset:
Patrones de Disponibilidad Emocional y los Problemas de Salud Mental del Pre-escolar
Authors: Gil Rodríguez Laura , Lucio Gómez Maqueo Emilia , Forns I Santacana María
Published: September 2020

En este estudio se examinaron los patrones de disponibilidad emocional de sesenta díadas de madre e hijo en una sesión de juego semiestructurado y los problemas de salud mental de un grupo de preescolares. Se analizó la asociación entre la disponibilidad emocional y los problemas de los niños; así como las diferencias en el nivel de problemas externalizados e internalizados según los patrones de interacción. Se utilizó la Escala de Disponibilidad Emocional (The Emotional Availability Scales; Biringen, 2008) y el Cuestionario sobre el comportamiento de niños (as) de 1.5-5 años (Child Behavior Checklist [CBCL 1.5-5]; Achenbach & Rescorla, 2000). Altos puntajes en sensibilidad materna, ausencia de intrusión de las madres, así como en capacidad de respuesta e involucramiento de los niños se asociaron a un menor nivel de problemas en los niños. Se conformaron tres patrones de disponibilidad emocional diádica: de alto, medio y bajo funcionamiento. Los niños del patrón de baja disponibilidad emocional mostraron un mayor nivel de aislamiento, de problemas internalizados, y de total de problemas en comparación con los niños del patrón de alto funcionamiento. El estudio aporta evidencia de la importancia de la evaluación de las relaciones entre padres e hijos en la edad preescolar.
Relación de las creencias mágicas con el descuento de recompensas monetarias
Authors: Jardines Dalia K. , Ávila Santibáñez Raúl
Published: September 2020

Se ha sugerido que las creencias mágicas, religiosas y supersticiosas, están relacionadas con las conductas de autocontrol/impulsividad y de aversión/propensión al riesgo. Estas conductas pueden cuantificarse con la métrica del descuento del valor de una recompensa en función de su demora de entrega o probabilidad de ocurrencia. Así, el propósito del presente trabajo fue averiguar la relación entre las creencias mágicas y el autocontrol/impulsividad y la aversión/propensión al riesgo, utilizando el método del descuento del valor relativo de las recompensas. Ochenta participantes respondieron tres tareas; una de creencias mágicas, otra de descuento temporal y una de descuento probabilístico. El resultado principal del estudio fue que los participantes que mostraron un mayor indice de credulidad en creencias religiosas y supersticiosas mostraron una mayor tasa de descuento temporal y probabilístico que los participantes que tuvieron indices más bajos de credulidad en las mismas creencias. Estos resultados sugieren una relación entre las creencias mágicas y los fenómenos estudiados con la métrica del descuento del valor relativo de recompensas demoradas o probables. Esto es, los datos sugieren que los participantes con un nivel más alto de creencias mágicas también mostraron más conductas impulsivas y de aversión al riesgo que los participantes con niveles más bajos de creencias.
La inteligencia a través de las generaciones: Millennials y centennials
Authors: Garzaniti Ramiro
Published: September 2020

Se presentan los resultados obtenidos en la construcción de baremos del Test de Matrices Progresivas de Raven, para la ciudad de La Plata, Argentina; y su comparación con aquellos de los años 1964 y 2000. Se seleccionó una muestra de 933 sujetos de 19 a 30 años de edad, con educación secundaria completa. El instrumento fue administrado en presencia de un examinador, de manera colectiva y sin límite de tiempo. Los resultados se analizaron en cuatro grupos de edad: 19-20 años, 21-22 años, 23-24 años y 25-30 años y se compararon con los baremos anteriores. Se constató que el efecto Flynn es seguido de un Efecto Meseta: luego del aumento significativo de los puntajes durante la segunda mitad del siglo XX, se aprecia una detención de tal crecimiento. Las razones que explicaron el crecimiento de los puntajes no resultan suficientes para poder entender que ya no aumenten. Los sujetos evaluados se corresponden con los denominados nativos digitales. Lo que caracteriza a estos grupos generacionales denominados Millennials y Centennials, está ligado al desarrollo tecnológico. Sobre esta base construyen un modo de entender el mundo y de comunicarse, tan particular y diferente a lo conocido que podría estar impactando sobre las puntuaciones obtenidas en la prueba.
Escala del Modelo de Creencias de Salud para la Autoexploración de Mama en Estudiantes Universitarias
Authors: Juárez García Dehisy Marisol
Published: September 2020

El objetivo de este estudio fue adaptar la escala del modelo de creencias de salud para la autoexploración de mama (AEM) en estudiantes universitarias y determinar su validez y confiabilidad. La escala de modelo de creencias de salud sobre la AEM de 39 ítems fue aplicada en 994 estudiantes de licenciatura. La confiabilidad se evaluó a través del Alfa de Cronbach, la validez de constructo mediante el Análisis Factorial Exploratorio. Se detectó una estructura de 6 factores con un valor de Kaiser-Meyer-Olkin de .839 y la prueba de esfericidad de Bartlett fue significativa [χ2(496)= 5379.608, p<.0001]. Los factores tuvieron valores de consistencia interna entre .67 a .87. Por lo que se concluye que la escala del modelo de creencias para la AEM en mujeres jóvenes mexicanas presenta la misma estructura factorial que la original siendo válida y confiable para propósitos de investigación.
Comprendo y siento tu dolor: Efectos emocionales de viñetas sobre exclusión social en adultos
Authors: Mustaca Alba Elisabeth
Published: September 2020

Se presentan estudios que evaluaron si los efectos emocionales inmediatos de la exclusión social se pueden provocar con viñetas. Estudio 1: los participantes (n=20) se dividieron en 4 grupos; dos leían una viñeta donde un niño era excluido de un juego; en los otros dos, era incluido. Cada clase de relato variaba según su modalidad: descriptivo o con contenido emocional. Los lectores contestaron a cómo creían que se sentían los niños en cuestionarios sobre necesidades básicas fundamentales (NBF, Williams, 2009), estado de ánimo (EA) y frustración. Las viñetas de exclusión, independientemente de su modalidad, produjeron un decremento significativo en las NBF, mayor EA negativo, menor EA positivo y mayor frustración respecto de los de inclusión. El Estudio 2 (n=103), intrasujeto, usó una viñeta de inclusión y otra de exclusión y los mismos cuestionarios del Estudio 1, agregando el EA y uno de Empatía Emocional para responder a “cómo se sintieron los lectores”. Se hallaron datos congruentes con los del Estudio 1. Los lectores experimentaron mayor EA negativo, menor EA positivo y mayor empatía emocional ante el relato de exclusión comparado con el de inclusión. Estos resultados abren un nuevo campo de experimentación sobre el tema.
Are Value Preferences and Social Cohesion Interconnected? The Case of Mexico
Authors: Boehnke Klaus , Berrueto Adriana , Dragolov Georgi , Ocampo Villegas Paloma
Published: September 2020

Social cohesion, the modern version of the fraternité motto of the French revolution, has become a hot social science topic. The paper addresses it from a social-psychological perspective, asking whether individually and societally prevailing value preferences are interconnected with the level of cohesion in society. Mexico serves as the case to examine whether findings for European countries, obtained in the Bertelsmann Social Cohesion Radar, can be generalized to Latin America. Is it true also in Mexico that strong self-transcendence values (Universalism) foster social cohesion, whereas strong self-enhancement values (Power) impede it? A large random probability quota sample (N = 2,003) was gathered to answer the research question. Results showed that, largely, findings from Europe could be generalized to the Mexican context. However, the role of Security values emerged as different. Whereas in Europe such value preferences covaried with low levels of cohesion, in Mexico they were generally associated with higher levels. The authors interpret this as evidence for negative consequences of neoliberal economic policies for social cohesion. Unlike in Europe, strong support for Security values seems to serve as a safeguard against capitalist economic pressures more so than being a sign for an egoistic preservation of one’s own lot.
A Malinchismo Scale for Use among Adolescents
Authors: Galán Jiménez Jaime Sebastián F. , Ferguson Gail Marcia , Sánchez Armáss Cappello Omar , Torres Colunga Luz Paulina , Cerda Escobedo Carmen Elizabeth
Published: September 2020

Malinchismo is a recently documented concept referring to preferencing the culture, ideas, tastes and behaviors of another nation/culture over one’s own. First, we introduce this new concept in relation to post-colonial theory, social identity theory, and remote acculturation theory, explaining its relevance to adolescent development. We then introduce and validate a new Malinchismo scale using a derivative sequential method among two samples of adolescents in Mexico (n = 560 total). Our Malinchismo Scale is more comprehensive than existing alternatives and is the first to be validated for use among adolescents. We assessed 1) content validity using the responses of content experts who served as judges, 2) construct validity using exploratory and confirmatory factor analyses (EFA and CFA, respectively), and 3) convergent and discriminant validity using participant responses to the Ingroup Interethnic Bias Test. In total, 366 adolescents were in the EFA sample (M=16.18 years, SD=0.74, 62% female) and 194 adolescents were in the CFA sample (M=16.17, SD=1.06, 57% female). Results revealed excellent psychometric properties on all indices, supporting the Malinchismo Scale as a valid and reliable measure for adolescents.
Polish Honor and Norwegian Dignity: Life Satisfaction, Acculturation, and Self-Worth
Authors: Świdrak Justyna , Krys Kuba , Kwiatkowska Anna , Kosakowska-Berezecka Natasza , Gjerstad Brita
Published: September 2020

Locus of self-worth shifts from internal in cultures of dignity to external in cultures of honor. It remains yet unknown whether it can be modified, for example, under an influence of important life events, as migration to a culture of a distinct logic. Our study aimed to analyse relationships between the locus of self-worth and the acculturation strategies on life satisfaction. We collected data from 60 heterosexual Polish couples living in Poland, 120 Polish migrant couples in Norway, and 60 Norwegian couples living in Norway. Groups differed from each other in life satisfaction and in locus of self-worth, with Norwegians valuating the self the most internally and Poles in Poland the most externally. Our results on locus of self-worth show that Polish culture fits in the classification of culture of honor, while Norwegians represent culture of dignity. Moreover, a series of hierarchical linear regressions demonstrated that both locus of self-worth and acculturation strategy are significant predictors of participants’ life satisfaction, with a moderating role of migrants’ attachment to Polish culture and adaptation to Norwegian society.
Are Psychological Beliefs built on the Ideology of Early Christian Fathers?
Authors: García Cadena Cirilo H. , Valle de la O Adrián , Carrascosa Venegas César Augusto , Castro Saucedo Laura Karina , Daniel-González Leopoldo , Caycho Rodríguez Tomás
Published: September 2020

The aims of the present study were to investigate the relationship between: a) Patristic ideology and mentalist and behaviorist beliefs, and b) the relationship between mentalist and behaviorist beliefs and cognitive, neuropsychological and interbehavioral beliefs. The beliefs were assessed through an instrument purposely built for this research. A sample composed of 284 university students of first-semester psychology (84 men and 200 women; mean ages M = 17.82 years, SD = 2.34, range 16-38 years) were enrolled. After performing structural equation modelling (SEM), results show that patristic ideology is not related to behaviorism (β = .09, p = .387), but it is related with mentalism (β = .26, p = .042), also the mentalism is related with cognitive beliefs (β = .72, p =.001) and neuropsychological beliefs (β = .87, p = .014), while behaviorism is related with interbehavioral beliefs (β = .42, p = .014). It was found that first-year psychology students show less acceptance of the early patristic ideology (M = 75.28), it is less successful than mentalism (M = 86.33). The conclusion is that mentalism, successor of Patristic ideology, continues to be related to cognitive and neuropsychological beliefs.
Fundamentalismo Religioso y su Relación con Variables Psicosociales en Judíos Ortodoxos
Authors: Etchezahar Edgardo
Published: September 2020

El fundamentalismo religioso expresa un conjunto de creencias basadas en una interpretación literal de un manuscrito considerado sagrado, con una exigencia intransigente de sometimiento a una doctrina. Diferentes variables psicosociales como el autoritarismo, la dominancia social, la necesidad de cierre y la ideología del rol de género han sido estudiadas en relación con fundamentalismo religioso. El presente trabajo tuvo como objetivo revisar estas relaciones y proponer un modelo teórico que las vincula, en una muestra de judíos ortodoxos. Se trabajó con una muestra no probabilística de judíos ortodoxos, compuesta por 426 adultos entre hombres y mujeres, con un rango etario de 18 a 69 años. Los resultados observados, en convergencia con estudios previos, confirman las relaciones positivas entre el fundamentalismo religioso y la necesidad de cierre cognitivo, el autoritarismo del ala de derechas, la orientación a la dominancia social y la ideología de roles de género. A partir de ello, se propone un modelo teórico en el que autoritarismo y dominancia social modulan los niveles de necesidad de cierre y fundamentalismo religioso los que, a su vez, inciden en los niveles de ideología del rol de género. Los hallazgos de este estudio pueden contribuir al análisis de los efectos de la radicalización y brindar insumos para el desarrollo e implementación de las medidas preventivas necesarias. Se discuten los alcances y límites de la propuesta teórica.
Predictors for Loneliness Perceived by the Interviewer or the Individual: Findings from Limited Disability Pensioners and Medical Rehabilitation Patients
Authors: Lippke Sonia
Published: September 2020

Loneliness can be seen as indicator of social participation which is a major concern of the UN Convention on the Rights of Persons with Disabilities. Temporary disability pensioners and medical rehabilitants are persons with disabilities, whose rights should be empowered. Moreover, loneliness is a major burden for the individual and finding ways to overcome loneliness are accordingly required. Previous research has shown that different socio-demographic characteristics, life-satisfaction and social support interrelate with loneliness. The aim of the present study was to replicate findings with two computer-assisted telephone interview studies with individuals insured with a local pension fund. While study 1 recruited N = 453 disability pensioners (mean age=50.4 years, 53.5 % female) and assessed their loneliness with the typical self-report measured by directly asking, study 2 recruited N = 1,044 patients in a medical rehabilitation (mean age=49.5 years, 36 % female) and used the reports of their interviewers without asking the study participants directly about their loneliness. In both studies, more life-satisfaction was significantly associated with less loneliness (beta=-.41 and -.23). However, only in the interviewer-rated study, higher social support was related to less loneliness (beta=-.16). Sex differences were found in the interviewer-rated study (women were rated as lonelier, beta=.11), while an interrelation with age was only found if self-reports were used in terms of younger disability pensioners reported more loneliness (beta=-.24). The findings open options for counseling to also improve self-reported life-satisfaction. While interviewers rate female interviewees as lonelier than men, interventions should not forget about men as they report equal loneliness if controlled for other variables. The results replicate that health and life-satisfaction are imperative and addressable to decrease loneliness. This should be researched further and used for interventions.
Generalización de Palabras en Infantes Hispanohablantes: El Sesgo hacia la Forma
Authors: González Aguirre Omar Abad
Published: September 2020

En diversas investigaciones se ha observado que los infantes muestran un sesgo hacia la forma al generalizar palabras a nuevos objetos de una categoría. Sin embargo, en estudios con infantes aprendices del idioma español no se ha observado una preferencia en tareas en las que se contrastan objetos similares en la forma, la textura y el color.  El objetivo de la presente investigación fue comparar la habilidad de dos grupos de infantes hispanohablantes de 24 meses de edad para formar nuevas categorías a partir de la forma y color como características definitorias. Se empleó el Paradigma intermodal de Atención Preferencial. Los resultados mostraron que los infantes formaron categorías a partir de la forma, pero no del color. Aunque en estudios anteriores no se ha observado un sesgo, si se induce la formación de categorías, los infantes de lengua hispana muestran una preferencia por la forma como característica definitoria cuando se contrasta con el color, se discute en torno a la relación entre esta habilidad y el sesgo hacia la forma observado en otros estudios.
Presión Social de Familia y Amistades en la Conformación de la Identidad de Género en Adolescentes de la Ciudad de México
Authors: Armenta Hurtarte Carolina
Published: September 2020

México ha desarrollado diversas acciones que buscan cambiar el sistema tradicional binario de los géneros para promover la equidad entre estos (CONAPRED, 2018, 2018). Se ha identificado que, a través de las amistades del mismo sexo, se socializan los patrones de género típicos socialmente para mujeres y hombres (Winstead, Derlega, & Rose, 1997). El objetivo de este estudio es analizar la asociación entre la presión social de amistades y familiares en la conformación de la identidad de género (Córdoba & Sapién, 2011). Para lo cual, se conformó una muestra de 313 adolescentes quienes contestaron la escala de identidad de género (Eagan & Perry, 2001). Los hallazgos muestran que los hombres tienen mayor presión social por la familia y amistades que las mujeres, además se encontró que la presión social por parte de las amistades predice la identidad de género durante la adolescencia en hombres y mujeres. Particularmente, en hombres se observa que la presión de amistades del mismo sexo conlleva a tener mayor autopercepción de las conductas no típicas al género asignado. Finalmente, existen percepciones que apuntan a que los esfuerzos por la equidad de los géneros tienen incidencia en la conformación de la identidad de género en las mujeres.
Escala de Conductas Parentales Ante el Uso de Tecnología en Adolescentes
Authors: Méndez Sánchez María del Pilar
Published: September 2020

El uso de la tecnología se ha incrementado alrededor del mundo, en México hay 71.3 millones de usuarios, siendo niños y adolescentes, el segundo grupo que más accede a Internet, a su vez se originan diversos peligros y riesgos. Por lo tanto, la familia es un factor protector que permite regular, supervisar y guiar el contenido virtual. El objetivo del presente estudio fue confirmar la estructura factorial psicométrica de la escala de conductas parentales ante el uso de tecnología en adolescentes. Participaron 594 adolescentes de la Ciudad de México. Los resultados indicaron que el modelo pertinente a las prácticas de la mamá mostró índices de ajuste aceptables: CFI = .930; IFI = .931; NFI = .897 y RMSA = .056; al igual que el del papá: CFI = .961; IFI = .961; NFI = .943 y RMSA = .059. Se cumplieron criterios de normalidad, asimismo, los reactivos tuvieron estimaciones paramétricas arriba de .50, y presentaron índices de consistencia interna Alpha de Cronbach arriba de .70. Se concluye que la escala cumple con las propiedades psicométricas aceptables y permite evaluar la percepción de los adolescentes, sobre el comportamiento de sus padres frente al uso de internet.
Perceived Influence of Medical Students’ Community Health Assessment Projects
Authors: Baker Nancy J. , Cutler Madison , Sopdie Elizabeth
Published: September 2020

Background and Objectives: To achieve overall health, physicians must understand how community and population health impacts individual health. Although several US medical schools have incorporated community health assessment project requirements into traditional curricula, examples in longitudinal integrated clerkships are unknown. This study was designed to assess alumni perceptions of the influence of community health assessment projects, a core component of the University of Minnesota Rural and Metropolitan Physician Associate Program’s (RPAP/MetroPAP) 9-month longitudinal integrated curriculum.
Methods: This 2018 study consisted of a descriptive cross-sectional survey of 480 RPAP/MetroPAP alumni who completed 457 community health assessment projects between 2004/2005 and 2016/2017. The authors administered a 14-item survey requesting date and location of RPAP/MetroPAP 9-month placement, name of project, source of project idea, and perception of project influence on professional activities. Quantitative data were collected using 4-point Likert scales. We collected qualitative data with open text boxes.
Results: The survey response rate was 42.29% (203/480). A key finding was alumni perceived project ideas arising from community partners had greater impact on their acquisition of several community engagement skills. One-half reported projects influenced their professional activities, evidenced by ongoing community engagement, interest and participation in public health and preventive health initiatives, efforts to learn about specific health issues, social determinants of health and patient advocacy.
Conclusions: This exploratory study suggests medical student community health assessment projects enhance community engagement and soliciting project ideas from community partners increases student acquisition of community engagement skills.
STUDI ETNOBOTANI TUMBUHAN OBAT MASYARAKAT SUKU TOPO UMA DI DESA BERDIKARI KABUPATEN SIGI SULAWESI TENGAH
Authors: Alvionita Alvionita , Lambui Orryani , Pitopang Ramadanil
Published: September 2020

A research entitled Ethnobotanical Studies of Medicinal Plant of Topo Uma Tribe in Berdikari Village Sigi Regency Central Sulawesi has been carried out from December 2016 to February 2017. The research objective was to obtain species of plants used by community of Topo Uma tribe. This research used qualitative and quantitative method. The result showed that there were 56 plants species from 30 families that used by Topo Uma Tribe in Berdikari village. The highest percentace that use in the part of plants were 56,33% of leaves. The processing method is crushed, roasted, pulverized, fried, baked, shredded, boiled, brewed, boiled made cigarette, chewed,  cooked as a vegetable, direct attached parts of the body. Types of diseases that are treatable infectious diseases, non-communicable diseases and health care.
Aktivitas Antioksidan Likopen Buah Tomat (Solanum lycopersicum L.) Terblending dalam Minyak Padat Ikan Lele (Clarias sp)
Authors: Surya Wahyuningsih Eka , Syamsuddin  , Prismawiryanti  , Pusptasari Dwi Juli
Published: September 2020

Research on the antioxidant lycopene of tomato fruit (Solanum lycopersicum L.) blended in frying fat from catfish (Clarias sp) oil has been done. The purpose of this research is to determine the antioxidant activity of tomato lycopene before and after being grounded into frying fat and determine the quality of frying fat after being grounded with tomato lycopene. The antioxidant activity of tomato lycopene is determined by the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. Analysis of frying fat quality includes determination of pH, determination of FFA (free fatty acid) levels, determination of total fat content, measurement of water content, peroxide number and organoleptic observation. Antioxidant activity of tomato lycopen was very high, namely with inhibition value of 89.79%; 90.34%; 91.49% and 92.10%. Frying fat analysis showed high antioxidant activity of lycopene tomatoes with 50.67% inhibition; 51.63%; 51.39% and 51.23%. The results of the analysis of the quality of frying fat are nearly same with SNI quality standards, except for peroxide numbers.

Keywords: tomato, lycopene, antioxidants, frying fat, catfish, DPPH
Penurunan Kadar Asam dalam Kopi Robusta (Coffea canephora) dari Desa Rantebua Kabupaten Toraja Utara dengan Teknik Pemanasan
Authors: Kasim Syahruddin , Liong Syarifuddin , Ruslan  , Lullung Alprianto
Published: September 2020

Robusta coffee (Coffea canephora) is the most widely produced coffee in Indonesia. The relatively high acid content causes robusta coffee to be less attractive to both local and international consumers. Acid levels in coffee can be reduced by heating techniques using water as a solvent because it is cheap and easy to obtain and water is also a safe solvent and has no side effects for health. Coffee bean water content was analyzed by heating to constant weight by the oven method, acid content by titration technique, and followed by organoleptic testing. The results of the analysis of water content for dry treatment of 10.02%, wet treatment of 10.35% and on heating for 15, 30, 45, 60, 75, and 90 minutes respectively at 9.99%; 10.34%; 9.70%; 10.40%; 11.65% and 11.36%. The results of the analysis of acid levels for the treatment of dry processing amounted to 3.65%, wet processing amounted to 3.42%, and for heating for 15, 30, 45, 60, 75, and 90 minutes respectively 3.03%; 2.76%; 2.51%; 2.39%; 2,32% and 2,28%. Organoleptic test results showed that the decline in the quality of coffee occurs when heating above 45 minutes. Based on research data it was concluded that the heating method can reduce acid levels in coffee beans with a maximum heating time of 45 minutes to maintain the quality of taste in coffee.

Keywords: Coffea canephora, organoleptic, warming up, titration.
Sintesis Nanopartikel Perak Menggunakan Ekstrak Daun Eceng Gondok (Eichornia crassipes) Sebagai Bioreduktor
Authors: Kasim Syahruddin , Taba Paulina , Ruslan  , Anto Romi
Published: September 2020

Nanoparticles was done by adding water hyacinth leave extract to AgNO3 2mM solution with a ratio of 1:40. Formed silver nanoparticles were analyzed using UV-Vis spectrophotometer, SEM, XRD, PSA, and FTIR to determine its characteristics. Results showed that absorbance value increased if reaction time is increased. Maximum absorption was obtained at wavelength 432-446 nm by using UV-Vis spectrophotometer. Result of PSA analysis shows that the average size of silver nanoparticles formed is 93.2 nm while XRD analysis shows that the average crystal size of silver nanoparticles is 50.11 nm, with round shape and amorphous. Result of FTIR analysis to determine functional group that contributes to nanoparticle synthesis shows the contribution of OH group.

Keywords: reduction method, silver nanoparticles, Eichornia crassipes, bioreductor
Global sensitivity analyses of a neural networks model for a flotation circuit
Authors: Saldaña Manuel , Ayala Luis , Torres David , Toro Norman
Published: September 2020

Modeling of flotation processes is complex due to the large number of
variables involved and the lack of knowledge on the impact of operational
parameters on the response(s), and given this problem, machine learning
algorithms emerge as an alternative interesting when modeling dynamic
processes. In this work, different artificial neural network (ANN)
architectures for modeling the mineral concentrate in a
rougher-cleaner-scavenger (RCS) circuit based on the main process variables
are generated (variables as the recovery of the rougher, cleaner and
scavenger cells, along with disaggregated variables). Analysis of the global
sensitivity was performed to study the importance of the individual and
joint performances of the stages of the flotation circuit, reflected by
sensitivity indicators that allow to infer the impact that the stages and
operational parameters produce on the dependent variables (mineral
concentrate in rougher, cleaner and scavenger cells, in addition to the
global concentration in the RCS circuit). It should be noted that the ANN is
a useful tool for modeling dynamic systems such as flotation, while
sensitivity analysis shows that the operation of the three threads turns out
to be crucial for the subsequent evaluation of the circuit, while the
Unbundled variables that most interact with the overall recovery are gas
flow rate, bubble and particle diameters, bubble velocity, particle density,
and surface tension.
A new cognition on oscillatory thermocapillary convection for high Prandtl number fluids
Authors: Yang Shuo , Wang Guofeng , Ma Shanshan , Gao Yu
Published: September 2020

A direct numerical simulations on the oscillatory thermocapillary convection in a non-axisymmetric liquid bridge of high Prandtl number fluids under normal gravity has been conducted by using a new method of mass conserving level set method for capturing any micro-scale migrations of free surface. Against the former studies, the oscillatory behaviors of surface flow (the perturbation of velocity, temperature, and free surface) and flow pattern have been quantitatively investigated simultaneously for the first time. The present results show that the instability of thermocapillary convection originates from the oscillations of velocity, temperature, and free surface at the hot corner. The velocity oscillation responds slowly to the temperature oscillation, which are opposite in transfer direction for each other, resulting in the free surface oscillation. The oscillatory thermocapillary convection in the liquid bridge is eventually ex-cited by the coupling effects of these three kinds of oscillations, which discloses clearly the oscillatory mechanism of thermocapillary convection for high Prandtl number fluids.
Using artificial neural network for predicting heat transfer coefficient during flow boiling in an inclined channel
Authors: Bouali Adel , Hanini Salah , Mohammedi Brahim , Boumahdi Mouloud
Published: September 2020

The flow and heat transfer characteristics in a nuclear power plant in the event of a serious accident are simulated by boiling water in an inclined rectangular channel. In this study an artificial neural network model was developed with the aim of predicting heat transfer coefficient for flow boiling of water in inclined channel, the network was designed and trained by means of 520 experimental data points that were selected from within the literature. Orientation,mass flux, quality and heat flow which were employed to serve as variables of input of multiple layer perceptron neural network, whereas the analogous heat transfer coefficient was selected to be its output. Via the method of trial-and-error, multiple layer perceptron network with 30 neurons in the hidden layer was attained as optimal arteficial neural network structure. The fact that is was enabled to predict accurately the heat transfer coefficient. For the training set, the mean relative absolute error is about 0.68 % and the correlation coefficient, is about 0.9997. As for the testing and validation set they are, respectively, about 0.60 % and 0.9998 and about 0.79 % and 0.9996.
Environmental tests of vapor compression heat pump for space applications
Authors: Ma Xudong , Ma Rui , Ye Yilin , Yan Suying , Wang Feng , Wu Yuting
Published: September 2020

Heat pumps are needed to provide a suitable temperature for both people and equipment in spacecraft. This paper reports on work designed to see if vapor compression heat pumps, in particular, can be expected to function normally in space. A vapor compression heat pump was built and tested under conditions of high temperature (70?), low temperature (0?), and near-vacuum (10-4 Pa). It was found that the coefficient of performance of this heat pump was 2.99 at both high and low temperatures, and was 2.1 under near vacuum conditions. The results suggest that vapor compression heat pumps are suitable for use in space.
Evaluating Blockchain Using COSO
Authors: Vincent Nishani Edirisinghe , Barkhi Reza
Published: September 2020

As companies begin to explore and develop technology solutions based on blockchain and smart contracts, there is a need to understand the impact of blockchain and smart contracts on the assessment of internal controls and enterprise risk. Especially since the distributed ledger and smart contracts blur the system boundaries between trading partners, there is a need to understand whether internal control assessments based on a single company approach is adequate in an integrated and collaborative environment. This paper provides an overview of smart contracts for practitioners and describes the associated risks of engaging in a blockchain consortium. We also list potential questions related to internal controls that may be considered when either engaging in a consortium or executing a smart contract. We then discuss whether current frameworks, specifically the Committee of Sponsoring Organizations' (COSO) integrated and COSO's Enterprise Risk Management (ERM) frameworks, adequately address a collaborative supply chain ecosystem.
Using Data Analytics to Evaluate Policy Implications of Migration Patterns: Application for Analytics, AIS, and Tax Classes
Authors: Cheng Christine , Varadharajan Anu
Published: September 2020

This case uses IRS SOI migration data to help students understand the power of data analysis to identify potential policy issues faced by state governments. The data skills covered in this case are used by entry level accounting professionals in all fields: the Extract, Transform, and Load (ETL) process using Alteryx and creating data visualizations using Tableau. The case learning objectives are: (1) develop students' ETL skills; (2) develop students' data visualization skills; (3) develop students' critical-thinking skills, and (4) enhance students' effective oral and written communications skills. Pre- and post-learning assessment surveys and open-ended responses indicate that the case meets these learning objectives. Students easily related to policy questions surrounding migration as future employees considering their career options. As such, this case is appropriate for stand-alone data analytics courses in business or accounting, accounting information systems courses, undergraduate- and graduate-level tax classes, and M.B.A. courses.
Preparing for the Robots: A Proposed Course in Robotic Process Automation
Authors: Vincent Nishani Edirisinghe , Igou Amy , Burns Mary B.
Published: September 2020

Robotic Process Automation (RPA) is poised to change the accounting and auditing workplace significantly. RPA will likely shift the skillset needed by all accountants. Therefore, the accounting curriculum quickly needs to adapt to educate accountants of the future in this skillset. This paper presents a proposed course, focusing on the automation of accounting processes, to add to the accounting curriculum. The course includes an introduction of RPA and how to use the tools. The course focuses on a development framework for the implementation of technology as well as governance of the application.
Management Tenure and the Quality of Corporate Bond Ratings
Authors: Zhang Eliza Xia , Schloetzer Jason D.
Published: September 2020

We examine the implication of management for credit rating quality by focusing on the relation between management tenure and rating quality. Using a large sample of corporate bond issues in the U.S., we find robust evidence that firms with longer-tenured CEOs have lower rating quality, as reflected in lower rating accuracy, informativeness, and timeliness. Further analyses uncover two channels that underlie this relation. One channel is through learned confidence: as CEO tenure increases, rating agencies learn about how the CEO influences firm value, which leads agencies to reduce their caution and effort in management assessment. The other channel is through developed relationships: as CEO tenure increases, rating agencies develop relationships with the CEO, which leads agencies to reduce scrutiny of or cater to the CEO and her firm. Overall, we show that management tenure has important implications for the external oversight of rating agencies.

Data Availability: Data are available from the public sources cited in the text.
International Transfer Pricing: MNE Dependency on Knowledge of External Tax Consultants
Authors: Cools Martine , Rossing Jacob Christian Plesner
Published: September 2020

This paper explores the dependency of multinational enterprises (MNEs) on the international transfer pricing (ITP) knowledge offered by external tax consultants. Based on interviews with 13 ITP/tax executives working for large MNEs in the U.K., we find that the dependency on consultants varies significantly across specific ITP tasks. This dependency is not rooted in a lack of in-house technical ITP knowledge. Rather, consultants offer important industry and process knowledge, often at the individual tax inspector level, that MNEs need to successfully implement their ITP policy and to handle negotiations with tax authorities. The recent OECD project on Base Erosion and Profit Shifting (BEPS) is found to have a limited effect on MNE dependency on consultants, except for the documentation task. We conclude that the profile of consultants as knowledge experts depends on the specific ITP task they undertake.
Unusual Tibial Site Metastases from a Muscle Invasive Urothelial Carcinoma: A Rare Case Report
Authors: G. Kastanis , M. Bachlitzanaki , A. Pantouvaki , G. Magarakis , M. Spyrantis
Published: September 2020

Bladder cancer is a common malignancy of genitourinary tract with a considerable morbidity and mortality. Muscle invasive urothelial carcinoma is the most common type of cancer especially in ages over 65 years old. Though various metastases have been observed, bone localization is the second site metastases and is appeared in pelvis and spine. We present a case with tibial diaphyseal bone metastases from urothelial carcinoma as a rare manifestation and we review the literature among diagnoses and therapeutic management.
Pengembangan Modul Bilingual Bergambar dengan Pendekatan Realistic Mathematics Education (RME) pada Materi Himpunan
Authors: Nurfithriyya Aida , Kesuma Guntur Cahaya , M Rosida Rakhmawati
Published: September 2020

Abstract: The purpose of this reaserch is to develop teaching materials consisting of pictorial bilingual modules using Realistic Mathematics Education (RME) on set material and to research the effectiveness of the product being developed. The research used in this research is Research and Development using ADDIE models consisting of motion sickness Analysis, Design, Development, Implementation and Evaluation. This study was declared valid and feasible to be used as teaching material for mathematics learning by 3 material experts who obtained an average score of 3,72 in the "valid" category and 3 media experts with an average score of 3,71 in the "valid" category and 3 language experts with an average score of 3,65 with the category of "Valid" with each maximum score of validity is 4. With the test of attractiveness of teaching materials determined "Very Attractive" by a small group test of 9 students by agreeing to the average score average of 3,65 and a large group test of 29 students with approval of an average value of 3,68. The results of the assessment using testing the effect size with an approval score of 0,50 with the category "Effective Enough". So it can be concluded that the development of teaching materials produced is declared feasible and effective enough and can be used as teaching materials in learning mathematics. Abstrak: Tujuan dari penelitian ini yaitu mengembangkan bahan ajar berupa modul bilingual bergambar dengan pendekatan Realistic Mathematics Education (RME) pada materi himpunan serta mengetahui keefektifitasanproduk yang dikembangkan. Penelitian yang digunakan dalam penelitian ini adalahResearch and Development menggunakan model ADDIE yang terdiri dari tahap Analyze, Design, Development, Implementation dan Evaluation. Penelitian ini dinyatakan valid dan layak digunakan secara keseluruhan sebagai bahan ajar pembelajaran matematika oleh 3 ahli materi yang memperoleh skor rata-rata sebesar 3,72 dengan kategori “valid” dan 3 ahli media dengan skor rata-rata sebesar 3,71 dengan kategori “valid” serta 3 ahli bahasa dengan skor rata-rata sebesar 3,65 dengan kategori “Valid” dengan masing-masing skor maksimal kevalidan adalah 4. Sedangkan uji kemenarikan bahan ajar dinyatakan “Sangat Menarik” oleh uji kelompok kecil terhadap 9 orang peserta didikdengan perolehan skor rata-rata sebesar 3,65 dan uji kelompok besar terhadap 29 orang peserta didik dengan perolehan nilai rata-rata sebesar 3,68. Hasil penilaian uji efektivitas dengan menggunakan rumus effect sizedengan perolehan skor sebesar 0,50 dengan kategori “Cukup Efektif”. Sehingga dapat disimpulkan pengembangan bahan ajar yang dihasilkan dinyatakan layak dan cukup efektif serta dapat digunakan sebagai bahan ajar dalam pembelajaran matematika.
Model Cooperative Learning Tipe Student Teams Achievement Divisions (STAD): Dampaknya terhadap Motivasi Belajar Siswa
Authors: Erly Erly
Published: September 2020

High motivation to learn will encourage and move students to always move and achieve the best results. The purpose of this study was to see an increase in student motivation through the cooperative learning model Student Teams Achievement Divisions (STAD) type. The method used in this study is the Classroom Action Research (CAR) method. The population in this study were all students of class XII Science in SMA 2 Bandar Lampung. Sampling is done by simple random sampling technique. The sample in this study was 38 people. The analysis technique uses an independent sample t-test. The results showed that the implementation of the Student Teams Achievement Division (STAD) type of cooperative learning model on the principles of redox and electrochemical reactions were used to test student learning. The results of this study also discussed increasing students' motivation to learn including motivation to cooperate with each other, discuss, help each other, and ask questions
Problem Based Learning (PBL) and Verbal-visual Abilities: Its Influence on Students’ Mathematics Learning Outcomes
Authors: Yudistira Pengki , Syaiful Syaiful , Anggareini Evita
Published: September 2020

This quasi-experiment aims to determine the influence of the Problem Based Learning (PBL) model and verbal-visual abilities on Grade VIII students’ learning outcomes. The population in this study were all students of SMPN 7 Kerinci and the sample of the study was 27 students from class VIII A as the experimental class and 26 students from class VIII B as the control class.  Research data collection through test instruments to see students’ mathematics learning outcomes.  Statistical analysis using two-way ANOVA with SPSS 21 software with a significance of 0.05. The results showed that there was an influence of the Problem Based Learning (PBL) model and verbal-visual ability on the mathematics learning outcomes of Grade VIII students with sig. 0,001 0,005,  there is an influence of verbal-visual ability on mathematics learning outcomes of class VIII students with sig. 0,000 0.05 and there is no interaction between the PBL model and verbal-visual ability in influencing students’ learning outcomes in class VIII with sig. 0.341 0.05.
Constructivism-Based Mathematics Learning Multimedia to Improve Students’ Mathematical Communication Skills
Authors: Syukri Ahmad , Marzal Jefri , Muhaimin Muhaimin
Published: September 2020

This study aims to describe the process of developing Constructivism-based Mathematics Multimedia, determine students’ perceptions of Multimedia and find out the level of improvement in students’ mathematics communication skills after using this Multimedia. This research ran for 1 month in class X MIPA 1, X MIPA 2, and X MIPA 3 SMAN 1 Jambi. The development model used in this study is the ADDIE development model. The type of data is qualitative data and quantitative data. From the results of the pre-test and post-test, it was found that 13 students had an increase in mathematical communication skills with high criteria, 7 students had an increase in mathematical communication skills with medium criteria, and 12 students had an increase in mathematical communication skills with low criteria. Based on the results of the study it can be concluded that Constructivism-based Multimedia can improve the students’ mathematics communication skills.
Ethnomathematics Exploration in Panataran Temple and Its Implementation in Learning
Authors: Munthahana Jayanti , Budiarto Mega Teguh
Published: September 2020

This research was a qualitative research with an ethnographic approach. Data obtained through observation, interview, literacy study, and documentation with Triangulation Method as data validity. This research examined the mathematical concepts of cultural elements, especially in the building of Bale Agung, Pendhopo Teras, Angkatahun Temple, Naga Temple, Induk Temple and Palah Inscription. The cultural elements studied were also in the form of technology systems used, religion, arts, language and social organization. Based on the results of the study, it was found that there were mathematical concepts that were applied to these cultural buildings, these concepts were in the form of Cuboid and Quadrilateral Prism, Numbers and Number Symbols, Geometry Transformation (Translation and Reflection), and Probability. The building at Candi Panataran can be an object of learning in school for all levels (Primary and Secondary school).
Trombogennost' u bol'nykh ishemicheskim insul'tom na fone istinnoy politsitemii
Authors: Танашян М. М. , Шабалина А. А. , Ройтман Е. В. , Вавилова Т. В. , Кузнецова П. И.
Published: September 2020

Problema vozniknoveniya i vozmozhnyye prichiny trombogennosti u patsiyentov s ishemicheskim insul'tom (II) na fone istinnoy politsitemii (IP) ostayetsya aktual'noy. Tsel'yu issledovaniya bylo opredelit' kompleks faktorov, assotsiirovannykh s formirovaniyem vysokoy trombogennosti u patsiyentov s II na fone IP. Provedeno kompleksnoye kliniko-laboratornoye obsledovaniye 127 patsiyentov v ostreyshem periode II i spustya 16–18 mesyatsev: 68 patsiyentov s II na fone istinnoy politsitemii IP (osnovnaya gruppa) i 59 patsiyentov s II bez IP (gruppa sravneniya). Laboratornoye obsledovaniye vklyuchalo opredeleniye gemoreologicheskikh parametrov, pokazateley sistemy gemostaza, funktsii endoteliya, aktivnosti angiogeneza, tsitokinovogo i vospalitel'nogo ryada, molekulyarno-geneticheskoye issledovaniye mutatsii V617F v gene JAK2 i analiz vklada ikh izmeneniy v razvitiye trombogemorragicheskikh oslozhneniy. Obnaruzheno, chto nevrologicheskaya kartina v obeikh gruppakh byla bez znachimykh razlichiy so sredney otsenkoy po shkale NIHSS 12 i 13 ballov sootvetstvenno. Otmecheny osobennosti morfofunktsional'nykh kharakteristik eritrotsitov i trombotsitov, a takzhe gemostaziologicheskogo i tsitokinovogo profilya u patsiyentov s II na fone IP po sravneniyu s gruppoy sravneniya. Odnim iz klyuchevykh elementov v potentsiirovanii tromboticheskikh oslozhneniy u patsiyentov s II i IP stala velichina allel'noy nagruzki mutatsii V617F v gene JAK2. Poluchennyye dannyye svidetel'stvuyut o sovokupnom deystvii kompleksa faktorov, formiruyushchikh vysokuyu trombogennost' u perenesshikh II patsiyentov s IP i preodolevayushchikh summarnyy effekt antitromboticheskoy terapii.