bluuebunny/crossref_metadata_2025 huggingface dataset:
Molecular Dynamics Study of the Development of the Dislocation Structure of an FCC Crystal Containing an Ensemble of Spherical Pores under an External Force Action
Authors: Markidonov A. V.  , Starostenkov M. D.  , Lipunov V. N.  , Lubyanoy D. A.  , Zakharov P. V.
Published: July 2023

Radiation swelling is one of the most urgent problems in radiation materials science. Its successful solution requires an understanding of the features of the mechanisms of pore healing. In this regard, there are various experimental and theoretical works devoted to this topic. At present, due to the increase in the power of computing tools, computer simulation allows for more and more complex studies and is used, among other things, in the field of materials science. In this paper, we present the results of molecular dynamics simulations devoted to the study of the processes of healing of a group of spherical pores in an fcc crystal subjected to shear deformation. As the study showed, for pores located in close proximity to each other, the formation of a common dislocation loop is characteristic, which is formed as a result of the attraction of individual loops having sections with opposite signs of helical orientation. The formation and subsequent development of such a loop contributes to a decrease in the free volume localized in the crystal in the form of pores. In addition, structural transformations that occur when a shock wave is generated in the computational cell, which creates additional stresses, are considered separately. In this case, the formation of the loop described above and the subsequent collapse of individual pores are also observed. Taking into account that the simulation was carried out at temperatures insufficient to activate diffusion processes, and the temperature control procedure was used in model experiments with wave generation, we can conclude that the shock wave is the cause of pore collapse even in the absence of high temperatures, and one of the main mechanisms of this process is the development of the dislocation structure of the ensemble of pores. Keywords: crystal, model, deformation, pore, dislocation.
The influence of carbon atoms on the magnetic moment in the Fe-C system: calculation from the first principles
Authors: Mirzoev A. A.  , Ridny Ya. M.  , Duryagina N. S.  , Verhovyh A. V.
Published: July 2023

From the first principles, the influence of carbon content on the magnetic moment of theBCC- and BCC Fe-C systems was evaluated. The systems Fe-0.40C, Fe-0.79C and Fe-1.19C mass% with mass% were considered. It is shown that the tetragonality of the Fe-C system increases linearly with increasing carbon content and is in good agreement with experimental results. The average magnetic moment on Fe atoms also increases linearly with increasing carbon content. At the same time, the magnetic moment of Fe atoms located in the immediate vicinity of carbon atoms is less than in pure iron, and the atoms of the second coordination sphere, on the contrary, have more. It is shown that this is primarily due to the magneto-volume effect, whereas the effect of tetragonal distortion of the lattice is secondary. Keywords: computer simulation, Fe-C, magnetic moment, tetragonality, magneto-volume effect.
Change in the melting temperature of metals with an increase in pressure
Authors: Magomedov M. N.
Published: July 2023

A new analytical (i.e., without computer modeling) method for calculating the dependence of the melting temperature Tm of a single-component crystal on pressure P is proposed. The method is based on the delocalization melting criterion and does not contain fitting constants. The baric dependences of the melting temperature Tm(P) and its pressure derivative T'm(P) for gold, platinum and niobium in the pressure range: P=0-1000 GPa were calculated by this method. It was shown that the dependences calculated by this method for gold and platinum agree better with the experimental data than the dependences obtained by computer simulation methods. For niobium, the calculated dependence Tm(P) turned out to be steeper, i.e., the value T'm(P) turned out to be larger than in the experiment. It was indicated that this discrepancy might be due both to a decrease in the Lindemann parameter with increasing pressure and to a redistribution of electrons on the s-d-orbitals during compression of transition metals with a BCC structure. Keywords: melting point, pressure, interatomic interaction, gold, platinum, niobium.
Multi-zone resonance spectrometry of inelastic electron scattering of light and the manifestation of strong spin-orbit interaction in nanostructures with quantum dots
Authors: Toporov V. V.  , Bayramov B. X.
Published: July 2023

Highly sensitive methods of inelastic light scattering spectrometry have been developed to detect individual photons in the visible and near-infrared spectral ranges (0.4-1.35) μm. Precision optical measurements of vibrational and electronic states of nanostructures with quantum objects are performed, using the example of quantum-dimensional nanoheterostructures (311)In si-GaAs/InAs with InAs quantum dots. A distinctive attractive feature of such structures with a degenerate valence band of symmetry 8 is the presence of a strong spin-orbit interaction. In this case, the intrinsic moment of the holes can effectively interact with the electric field of the incident light wave. It was found that such interaction causes intense luminescence and inelastic scattering of the light wave in the IR region of the 0.9-1.35 μm spectrum. Effective generation of nonequilibrium electron-hole (e-h) plasma with concentrations n=p=1.0·1017 cm-3 and T_e=T_h=25 K,was revealed under resonant excitation conditions, while the lattice temperature T_L=5.1 K. New mechanisms have been discovered for the formation of an abnormally intense integration spectrum of multiplex inelastic light scattering of a rather complex shape formed by various separable resonant contributions of the processes of quasi-elastic scattering by charge carriers, light scattering by acoustic plasmons of electron-hole plasma, as well as inelastic intra- and inter-band light scattering by heavy holes. It has been established that the anomalous intensity gain of such multi-zone selective resonant light scattering is more than 105 times higher than the intensity of Thomson light scattering on individual charge carriers. There is agreement between the estimated calculated and experimental spectra, and for the most part for the difficult-to-interpret significant width of the observed light scattering line. It is shown that new mechanisms of various contributions to the formation of scattered photon radiation are important diagnostic elements that are clearly manifested in the spectra of the resulting enhanced inelastic light scattering. Keywords: nanostructures, quantum objects, resonant scattering of light by charge carriers, exchange interaction, plasma diagnostics.
Effect of large single-ion anisotropy on the dynamic and static properties of a non-heisenberg ferrimagnet
Authors: Kosmachev O.A.  , Matyunina Ya.Yu.  , Fridman Yu.A.
Published: July 2023

The influence of a large single-ion anisotropy of the "easy plane" type on the phase states and spectra of elementary excitations of a ferrimagnet with sublattices S = 1 and sigma=1/2 and non-Heisenberg exchange interaction for a sublattice with S = 1 is studied. It is shown that for different ratios of the material parameters of the system, only one phase state is possible, characterized by both vector and tensor order parameters (quadrupole-ferrimagnetic). The condition for sublattice spin compensation is determined, as well as the behavior of the spectra of elementary excitations near the spin compensation line. In the vicinity of the spin compensation line, the magnon spectra are "antiferromagnetically similar". Keywords: large single-ion anisotropy, biquadratic exchange interaction, ferrimagnet.
Evolution of the spectral and structural characteristics of borates formed during the interaction of lanthanum and scandium oxides with a potassium tetraborate melt
Authors: Shmurak S.Z.  , Kedrov V.V.  , Kiselev A.P.  , Fursova T.N.  , Zver'kova I.I.
Published: July 2023

The structure, morphology, IR spectra, as well as luminescence spectra and luminescence excitation spectra of europium-doped borates formed during the interaction of lanthanum and scandium oxides with a potassium tetraborate melt at 970oC with the general formula La0.99-xScxEu0.01BO3 were studied. It is shown that with an increase in the Sc3+ concentration, three compounds are successively formed: LaBO3, LaSc3(BO3)4, and ScBO3. At 0≤ x≤ 0.26, the samples are single-phase and have the structure of LaBO3 aragonite. Within the range of 0.26<x<0.75, the samples are two-phase and contain the structures of LaBO3 aragonite and LaSc3(BO3)4 huntite. At 0.75≤ x≤0.85, LaSc3(BO3)4 is observed. Within the range of 0.85<x≤0.97, the samples are two-phase and consist of LaSc3(BO3)4 huntite and ScBO3 calcite. At 0.97<x≤0.99, the ScBO3 samples have a calcite structure. Correspondence between the structure and spectral characteristics of these compounds was established. Keywords: phosphors for LEDs, rare earth orthoborates, X-ray diffraction analysis, IR spectroscopy, luminescence spectra.
Phase transitions in a two-dimensional weakly diluted 4-state Potts model on a hexagonal lattice
Authors: Babaev A.B.  , Murtazaev A.K.
Published: July 2023

The Monte Carlo method is used to study phase transitions in a two-dimensional weakly diluted 4-state Potts model on a hexagonal lattice. Systems with linear dimensions L=21/336 at spin concentrations p=1.00, 0.90 are considered. The use of the fourth-order binder cumulants method and histogram data analysis showed that the introduction of nonmagnetic impurities has a stabilizing role in the implementation of the second-order phase transition in the Potts model under study on a hexagonal lattice. Keywords: Potts model, Monte Carlo method, thermodynamic parameters, disorder.
Hypnoprenatal reduces anxiety and stress in high-risk pregnancy in North Tapanuli District
Authors: Pakpahan Sulastry , Simbolon Ganda Agustina Hartati , Sianturi Elly , Simbolon Juana Linda
Published: July 2023

Background: High-risk pregnancies can cause more complications for the mother and fetus during pregnancy, childbirth, and the puerperium compared to normal pregnancies. High-risk factors during pregnancy can increase worry and stress, which can influence labor and delivery and are risk factors for postpartum depression. During pregnancy, stress can increase the risk of having a premature, low-birth-weight baby. Hypnoprenatal is an effective communication method to incorporate positive suggestions into the subconscious mind of pregnant women to reduce anxiety and stress during pregnancy.

Objectives: to determine the effect of hypnoprenatal intervention on anxiety and stress in high-risk pregnant women in the North Tapanuli District.

Methods: This research method used a pre-experimental method with a one group pre-test post-test design. Samples were taken by the purposive sampling method, which, based on the inclusion criteria, obtained as many as 36 high-risk pregnant women who experience anxiety and stress. Hypnoprenatal intervention was carried out for 3 days, twice a day, and then observations and interviews were carried out using the DAS 42 questionnaire. Data analysis used a paired t-test. The results showed that the characteristics of the respondents based on the age of the majority were >35 years (44.7%), secondary education (33.3%), farmer's work (52.8%), primigravidas (17%), high-risk pregnancies (72.7%), and low risk (27.8%).

Results : The results of the statistical tests showed differences and decreased levels of anxiety and stress in pregnant women at risk before and after the hypnoprenatal intervention, with a p-value of 0.000 (p<0.05).

Conclusions: hypnoprenatal has a significant effect on the level of anxiety and stress among pregnant women at risk. It is recommended that pregnant women use hypnoprenatal techniques to help reduce anxiety and stress during pregnancy, which affects the mother's psychological condition.
Enriching Data Science and Health Care Education: Application and Impact of Synthetic Data Sets Through the Health Gym Project (Preprint)
Authors: Kuo Nicholas I-Hsien , Perez-Concha Oscar , Hanly Mark , Mnatzaganian Emmanuel , Hao Brandon , Di Sipio Marcus , Yu Guolin , Vanjara Jash , Valerie Ivy Cerelia , de Oliveira Costa Juliana , Churches Timothy , Lujic Sanja , Hegarty Jo , Jorm Louisa , Barbieri Sebastiano
Published: July 2023

UNSTRUCTURED

Large-scale medical data sets are vital for hands-on education in health data science but are often inaccessible due to privacy concerns. Addressing this gap, we developed the Health Gym project, a free and open-source platform designed to generate synthetic health data sets applicable to various areas of data science education, including machine learning, data visualization, and traditional statistical models. Initially, we generated 3 synthetic data sets for sepsis, acute hypotension, and antiretroviral therapy for HIV infection. This paper discusses the educational applications of Health Gym’s synthetic data sets. We illustrate this through their use in postgraduate health data science courses delivered by the University of New South Wales, Australia, and a Datathon event, involving academics, students, clinicians, and local health district professionals. We also include adaptable worked examples using our synthetic data sets, designed to enrich hands-on tutorial and workshop experiences. Although we highlight the potential of these data sets in advancing data science education and health care artificial intelligence, we also emphasize the need for continued research into the inherent limitations of synthetic data.
Enhancing Animal Husbandry Skills of Inmates at the Class IIB Sleman Penitentiary through the "Ayam Bahagia" Program
Authors: Diatmono Dio Fico Felsidan , Komalasari Anisya Ratna , Lampart Shita Al-addawiyah , Sudrajat Briantoro Imam , Hanim Chusnul
Published: July 2023

Former inmates who experience discrimination while seeking employment may be more likely to recidivism if they do not have or lack the necessary skills. This issue is also faced by former inmates from the Sleman Class IIB Penitentiary, Yogyakarta Special Region, so several coaching in self-reliance and skills, e.g., animal husbandry, were provided in "Kampung Asimilasi" for inmates. However, there are problems with the animal husbandry of laying hens due to the lack of knowledge about proper management practices among correctional officers as facilitators. To address this, the "Ayam Bahagia" program was developed to provide correctional officers and inmates with the knowledge and practical skills they need to effectively and properly manage the raising of laying hens. The program covered the preparation, implementation, monitoring, and evaluation through a blended delivery: offline and online methods. Six correctional officers and eight inmates followed this program. A pre-test and post-test measured the increase in knowledge and practical skills. Data were analyzed using t-test. This program has resulted in a significant increase (P>0.005) in knowledge and skills related to animal husbandry. Correctional officers have been able to become facilitators for inmates with adequate ability, and inmates have been able to raise laying hens independently.
Increasing Public Knowledge about Vitamin and Health Supplements during the COVID-19 Pandemic
Authors: Safrina Ulya , Nida Khairun , Surahman Surahman
Published: July 2023

Vaccine development and enhancing the body’s immune system are the focus in dealing with COVID-19. One way to improve the body’s immune system is to consume immunostimulating substances, such as health supplements. However, most people still think that health supplements can be consumed daily without certain restrictions because vitamins are not considered drugs. The purpose of implementing this activity is to increase knowledge about how to use vitamins and health supplements and improve community skills to identify natural or fake vitamins and health supplements. The targets of this community service activity were cadre mothers from all sub-district in Utan Kayu Utara Village. The method of implementing the activity is by direct education and giving leaflets. Community service activities in the Utan Kayu Utara sub-district ran smoothly. Participants were very enthusiastic about asking and discussing the material presented. The number of participants in the activity was 40 people. There was an increase in the average value of knowledge from 59.00 ± 11.0 to 86.50 ± 7.49 after providing education through counselling and media leaflets.
Home Dialysis in North America
Authors: Quinn Robert R. , Lam Ngan N.
Published: July 2023

There is widespread interest in expanding the uptake of home dialysis in North America. Although kidney transplantation should be the preferred option in eligible patients, home hemodialysis (HD) and peritoneal dialysis (PD) offer cost-effective options for KRT. In this review, the motivation for promoting home dialysis is presented, and the literature supporting it is critically reviewed. Randomized comparisons of home HD and PD with in-center HD have been challenging to conduct and provide only limited information. Nonrandomized studies are heterogeneous in their design and have often yielded conflicting results. They are prone to bias, and this must be carefully considered when evaluating this literature. Home modalities seem to have equivalent clinical outcomes and quality of life when compared with in-center HD. However, the cost of providing home therapies, particularly PD, is lower than conventional, in-center HD. Measures of home dialysis utilization, the philosophy behind their measurement, and important factors to consider when interpreting them are discussed. The importance of understanding measures of home dialysis utilization in the context of rates of kidney failure, the proportion of individuals who opt for conservative care, and rates of kidney transplantation is highlighted, and a framework for proposing targets is presented, using PD as an example.
Differential Teachers’ Attention to Boys and Girls in Mathematics Whole Class Interaction Sequences
Authors: Magdefrau Jutta
Published: July 2023

The relationship of gender to the quality and type of interaction in the mathematics classroom is a question that has concerned researchers for some time. Past studies have indicated that patterns of interaction can be gender-specific, despite individual teachers regarding themselves as teaching in a gender-neutral manner. Drawing on interaction theory and socialization theory, this quantitative observational study tracked the number and type of interactions in 38 high school Mathematics classes across three schools, involving 899 students and 26 teachers (12 male, 14 female). The study investigated whether there were significant gender differences in the treatment of students during their engagement in different types of questioning behavior. It found that there were significant gender differences at student level that favored boys, but that questioning behaviors amongst individual teachers were highly variable. Teachers’ gender did not explain the differences. It is recommended that gender awareness be incorporated into teacher training.
Analysis of Bird Habitat Suitability in Chongming Island Based on GIS and Fragstats
Authors: Huang Jintao , Wang Ruei-Yuan , Chen Lingkang
Published: July 2023

With the development of society, the degree of human exploitation of nature is becoming more profound, which makes the fragmentation of the global environment more serious, leading to the reduction of species' Lebensraum and having a huge negative impact on the survival and development of various species. In this paper, we select the Chongming Island area in Shanghai as the study area and use the landscape pattern analysis and suitability analysis methods to comprehensively analyze the characteristics of the habitat pattern in this area as well as the suitability impact on the local birds. The research results show that the fragmentation of local habitats has decreased, but the connectivity between patches is low, and the changes in bird populations are relatively stable, showing a stable and positive trend.
A Narratological Study of Kamala Markandaya’s Two Virgins: Interpreting Narratives through Saroja’s Focalized View
Authors: Shukla Aruna , Tiwari Dr. Anoop Kumar
Published: July 2023

This study endeavours to examine Kamala Markandaya’s Two Virgins (1973) through the approach of narratology and analyse focalization in the novel to understand the narrative of ‘two virgins’. The novel is noted for its nonconforming narrative as it challenges the patriarchy through its subject while providing insights about the ethical code for women. Two Virgins subsides the notion of patriarchal narrative which celebrates the idea of women as the embodiment of chastity and virtue. The study presents Markanadya’s manoeuvre of narration as she used Saroja’s perspective to narrate the story of two sisters which attracted extensive contemplation from the reader as well as critics. Through this narrratological study of narrator and focalization the reader will understand how the story is constructed and affect us. This study will provide a method to analyse focalization in any fiction through the narratology which navigates the reader to decode the meaning of narrative.
Confiabilidad diagnóstica de la técnica del lavado broncoalveolar respecto al hisopado nasofaringeo de la prueba RT-PCR en tiempo real para la detección del virus SARS-COV-2. Una revisión sistemática y metaanálisis
Authors: Cuéllar-Laureano Raquel , Sánchez-Rodríguez Martha A.
Published: July 2023

Introducción. A partir del surgimiento del SARS-CoV-2, causante de la enfermedad COVID-19, la Organización Mundial de la Salud (OMS) la declaró oficialmente como pandemia y estableció a la RT-PCR en tiempo real de muestras de hisopado nasofaríngeo (HNO) como la prueba diagnóstica estándar de oro, con diferentes tipos de muestras. Objetivo. Presentar una síntesis de conocimiento sobre la confiabilidad diagnóstica de la muestra obtenida por medio del lavado broncoalveolar (LBA) con respecto al HNO, para identificar el virus SARS-Cov-2 a través de la RT-PCR en tiempo real. Método. Se llevó a cabo una búsqueda sistemática de estudios en PubMed, SciELO, LILACS, Web of Science y Epistemonikos acorde con los lineamientos internacionales de PRISMA. Se analizaron los estudios publicados hasta el día 17 de septiembre de 2021. Resultados. Se encontró un total de 680 estudios. Una vez revisados los textos completos, 7 estudios cumplieron los criterios de elegibilidad para la revisión sistemática y 2 estudios se incluyeron en el metaanálisis. Los estudios incluidos permiten considerar al LBA como una muestra adecuada para el diagnóstico de la COVID-19, sobre todo en pacientes con síntomas característicos de la enfermedad, con valores de sensibilidad entre 83% (IC95%: 36-100%) y 91% (IC95%: 59-100%) y de especificidad entre 72% (IC95%: 64-80%) y 100% (IC95%: 90-100%). Conclusiones. La sensibilidad y especificidad del LBA de la prueba diagnóstica son altas en comparación con el HNO; sin embargo, es necesario llevar a cabo más estudios para confirmar los hallazgos.
Percepción de necesidad de tratamiento ortodóncico en adolescentes. Revisión sistemática y meta-análisis
Authors: Valencia-Sanchez Karina Guadalupe , Servín-Hernandez Silvia Victoria
Published: July 2023

Introducción. Las maloclusiones son el tercer problema de salud bucodental, su presencia causa alteraciones en las funciones del sistema estomatognático y en la estética dental, las cuales repercuten psicológicamente. A pesar de su alta prevalencia, la búsqueda de tratamiento sigue siendo baja. Objetivo. Presentar una síntesis del conocimiento sobre la percepción de la necesidad de tratamiento ortodóncico en adolescentes, a través de una revisión sistemática (RS) y metanálisis (MA). Método. Se realizó una búsqueda de artículos hasta el 3 de enero de 2021 en las bases científicas de PubMed, Scopus, SciELO, LILACS y TESIUNAM. En este sentido, las palabras clave utilizadas fueron: “perception”, “orthodontic treatment need”, “malocclusion”. La estrategia de búsqueda fue: “perception AND orthodontic treatment need AND malocclusion”. Se encontraron 485 estudios, de los cuales, 5 cumplieron los criterios de elegibilidad para la RS y 3 para el MA. Resultados. Los principales factores asociados a la percepción de la necesidad de atención ortodóncica en adolescentes fueron la presencia de maloclusión leve (RM=5.35, IC95% 2.68-10.65, p<0.001), apiñamiento (RM=3.40, IC95% 1.36-8.50, p=0.009) y sobremordida (RM=2.51, IC 95%: 1.53-4.13, p<0.001). Existe una correlación positiva entre la necesidad percibida y diagnosticada en pacientes con tratamiento ortodóncico previo (r=0.309 p<0.01). Los datos del meta-análisis respecto a la necesidad de tratamiento ortodóncico diagnosticada por un especialista (NTOD) en comparación con la necesidad de atención ortodóncica percibida (NAOP) por adolescentes, mostraron que la NTOD es 14 veces mayor que la NAOP en los casos de maloclusión leve (RM=15.05, IC95% 2.42-93.49, p<0.01). En las maloclusiones moderadas, las NAOP de los adolescentes fue 87% menor que las NTOD (RM=0.13, IC95% 0.08-0.23, p<0.0001) y en las severas las NAOP fueron un 92% menor que las NTOD (RM=0.08 IC95% 0.03-0.22, p<0.0001). Conclusión. La autopercepción de la necesidad de tratamiento de ortodoncia en los adolescentes no depende de la presencia ni la gravedad de la maloclusión. Tampoco existe una asociación significativa con el sexo o la edad.
Razón de momios y riesgo relativo para revisiones sistemáticas y meta-análisis. Fundamento, análisis e interpretación
Authors: Castrejón-Delgado Lizett
Published: July 2023

En la práctica médica se toman decisiones a diario para mejorar la salud del paciente, por ello, los profesionales de la salud tienen la necesidad de integrar su experiencia clínica, conocimientos y habilidades con la mejor literatura científica. De ahí que, con el propósito de brindar una atención médica segura y de calidad, se pretende que las decisiones en la práctica clínica se apoyen de la medicina basada en la evidencia (MBE); la cual se fundamenta en el análisis objetivo, crítico y reflexivo de la mejor evidencia disponible para tomar decisiones sobre el cuidado de pacientes individuales. El rápido crecimiento de la literatura médica de alguna manera dificulta que el personal de salud se mantenga al día sobre los problemas que aquejan a la población. En este sentido, la revisión sistemática (RS) sintetiza de manera metódica el conocimiento generado de las investigaciones, de tal manera que se consideran como el pilar para el proceso de toma de decisiones basadas en evidencia. La RS comprende la evaluación exhaustiva y explícita de las publicaciones existentes por lo que es posible analizar la evidencia desde un punto de vista cualitativo (presentando la descripción de los resultados de cada estudio) o de manera cuantitativa al extraer los datos duros de los estudios para realizar un meta-análisis (MA) que combine de forma matemática los hallazgos obtenidos. El presente trabajo pretende facilitar al lector la comprensión e interpretación sobre las medidas de riesgo razón de momios y riesgo relativo para revisiones sistemáticas y meta-análisis.
Calidad de la información de los promocionales de la industria farmacéutica y la educación médica
Authors: Peredo-Silva Luis , Reyes-Morales Hortensia , Guizar-García Luis Alberto , Almeida-Gutiérrez Eduardo , Páez-Moreno Ricardo , Lifshitz Alberto , Mino-León Dolores
Published: July 2023

Introducción: El 15% de los promocionales de la industria farmacéutica (IF) incluyen información que no se fundamenta con los resultados del artículo original.

Objetivo: Evaluar la validez de los artículos científicos originales que sustentan la información de los promocionales de la IF dirigidos a internistas y cardiólogos y conciliar la información del artículo científico original con la del promocional.

Método: Los promocionales se obtuvieron en los congresos nacionales de Medicina Interna (MI) y Cardiología (C) realizados en México; aleatoriamente se seleccionaron 10 de cada especialidad; tres investigadores evaluaron la calidad de las referencias bibliográficas, la validez de los artículos originales y realizaron la conciliación de la información. Se realizó análisis descriptivo.

Resultados: Se recolectaron 57 promocionales de MI y 16 de C; la calidad de las referencias bibliográficas de 4 promocionales de MI se evaluaron como evidencia “moderada” y las referencias de 4 promocionales de C como evidencia “no científica”. Los ensayos clínicos controlados de MI y C fueron válidos, un estudio observacional de C se catalogó sin validez. La conciliación de la información del promocional con la del artículo original reveló diferencias en cuatro promocionales de cada especialidad y de acuerdo con los criterios éticos para la promoción de medicamentos de la Organización Mundial de la Salud (OMS) predominó la falta de exactitud, en algunos casos la información no fue fidedigna y/o verdadera.

Conclusiones: Es importante capacitar al médico en lectura crítica, para que evalúe objetivamente la información e identifique la promoción de medicamentos inefectivos y/o inseguros.
Actitudes y percepciones de los estudiantes de Odontología sobre la educación a distancia
Authors: Castro-Rodríguez Yuti
Published: July 2023

Introducción: La educación a distancia ha sido instaurada en múltiples universidades debido al contexto de la pandemia de COVID-19 y es discutido si presenta impactos positivos en el campo de Odontología.

Objetivo: Identificar las actitudes y percepciones de los estudiantes de Odontología sobre la educación a distancia.

Método: Estudio transversal comparativo que incluyó a estudiantes de la Facultad de Odontología de la Universidad Nacional Mayor de San Marcos (Lima, Perú). Se utilizó una escala de actitudes hacia el aprendizaje, un cuestionario de datos personales y preguntas abiertas. Los datos de la escala se presentaron como frecuencias relativas según respuesta global y puntuaciones promedio. Estos datos se compararon con las características de los estudiantes.

Resultados: Fueron encuestados 216 estudiantes, 120 (55.6 %) mujeres. El 34.7 % (n = 75) estuvo en desacuerdo al afirmar que la educación a distancia es más eficaz que el aprendizaje presencial, el 24.5 % (n = 53) sí estuvo de acuerdo. Los varones estuvieron más satisfechos con la educación a distancia (3.91 ± 1.02); las puntuaciones de esta satisfacción fueron más elevadas para los estudiantes de primer y segundo año, así como para aquellos que cursaban asignaturas teóricas (3.94 ± 1.12). Los estudiantes que recibieron asignaturas teóricas, prácticas y clínicas evidenciaron bajas puntuaciones respecto a la pregunta “Creo que no he aprendido bien con la educación a distancia” (3.01 ± 0.12).

Conclusiones: La mayoría de estudiantes de Odontología de una universidad pública peruana presentan actitudes de desacuerdo respecto a la eficacia de la educación a distancia sobre la educación presencial, principalmente por estudiantes de años superiores y aquellos que han llevado asignaturas teórico-prácticas y clínicas. La mayoría de estudiantes sí recomienda el uso del modelo educativo a distancia para llevar asignaturas teóricas, que no demanden sesiones prácticas donde se desarrollen habilidades psicomotrices y que se desarrolle una asignatura al día.
Using Data Mining Techniques for Field Data
Authors: H N Punya , Bharathi Dr.
Published: July 2023

Abstract: The population of India is continuously increasing and to meet the food necessities of this growing population, agricultural yield should be boosted. Knowledge discovered from raw data is useful for many purposes. This paper aims to analyse the field data using data mining algorithms and to find useful information from the results of these techniques which would help to improve the agricultural yield. Various mining algorithms applied on agricultural data were studied. Data mining techniques applied in this paper include clustering algorithms- K- means, DBSCAN, EM, the results of these algorithms are analysed.
Study Analysis of Car Rim Design and Mechanical Properties Using Catia
Authors: Pranoto Bayu , Chandra Gunawan , Muhammad Fakhruddin , Muhammad Trifiananto , Purwanto
Published: July 2023

This study discusses the design of a car rim and analyzed its mechanical properties using three different basic materials: aluminum, steel, titanium. The purpose of this study is to reduce production time and to minimize the risk of design failure. In this study using the Catia software to design a rim, then simulate the effect of applying force on a component, applying a certain working pressure, then able to perform calculations and display the results for analysis. The analytical method used is the FEM method of static analysis. The mesh type uses a linear tetrahedron mesh. Provision of clamps or fixed constraints is carried out on the surface of the bolt hole, where this surface is in contact with the wheel holder of car drive system. Then given a circumferential loading of 200 kN/m2. It was found that aluminum material is the best for the manufacture of car rims, which has a low density so it is lighter than steel and titanium. However, alloys such as lead and magnesium are needed to increase their hardness, and chromium alloys are needed to protect the rims from corrosion due to use in a polluted environment and contain impurities that can trigger corrosion.
Effect of Thermoelectric Power and Air Flow on Air Temperature and Relative Humidity
Authors: Fahruddin Arasy , Tjahjanti Prantasi Harmi , Mulyadi
Published: July 2023

A dehumidifier is a device for drying air by releasing moisture. A dehumidifier with a thermoelectric cooler has the advantage of being more compact and has the potential to be combined with an air heater. This study aimed to determine the effect of thermoelectric power and airflow on air temperature and relative humidity. The research method uses direct experiments with six pieces of thermoelectric as a coolant. The data taken are the cooler surface temperature, the air temperature that is dried, and the humidity of the air. The test results show that the dried air temperature can reach 25.6oC with 78% humidity in environmental conditions with an ambient air temperature of 31oC.
Effect of roof and wall material on energy usage for house cooling system in hot-humid climate
Authors: Wardah Izzah A , Basyarach Niken Adriaty
Published: July 2023

A model of a typical townhouse in Surabaya is simulated using building energy simulation software to analyse the energy consumption for cooling due to a severe climate. The assessment focused on the internal heat effects caused by the wall and roof material to meet the thermal comfort in a hot-humid climate region. A baseline building was a one-story building for one family with the typical load profile in Surabaya applied. The insulation thickness and material composition of the wall and roof were varied, whereas the internal cooling system was maintained at 25.5oC by the air-conditioning system. Results are presented and compared in terms of the annual energy consumption to meet the Indonesian standards for buildings. The best optimisation shows that the implementation of the insulation in the model can lower the annual energy consumption and conserve the energy by 37%.
On Vehicle Stabilization Under Saturation Constraints by Linear Quadratic Regulator
Authors: Vania Katherine Mulia , Djati Wibowo Djamari , Ibham Veza , Nurprasetio Ignatius Pulung
Published: July 2023

The stability of a four-wheel vehicle is an issue widely discussed. As an effort to reduce accidents involving four-wheel vehicles, many studies have been conducted to develop a vehicle stability control system. So far, all studies utilize vehicle lateral dynamics model as the reference to derive the desired states. However, defining the desired states using steady-state cornering values may yield instability due to changes in tire cornering stiffness. This paper proposes a simple vehicle stability control system that could stabilize the vehicle and allow tracking of a desired state under the case of vehicle instability due to reduced rear tire cornering stiffness. The controllers are designed using Linear Quadratic Regulator (LQR) technique and combined with the servo control system to track a reference state. Simulations are performed in MATLAB to validate the controller’s performance with and without controller constraint. Results show that the controller successfully stabilizes the vehicle and tracks the desired state.
Design of bionic prosthetic leg
Authors: Pratama Aldiansyah Wahyu , Daryono Daryono , Mulyono Mulyono
Published: July 2023

Along with the increase in the number of Indonesian people who are physically disabled and the number of cases of leg amputations above the knee, the need for prosthetic limbs in Indonesia is also increasing. Prosthetic limbs are tools to replace lost limbs caused by birth defects, amputations, or disease. The bionic prosthetic leg has a long-term useful purpose, as well as supporting the rights of people with disabilities. The device helps the above-the-knee amputee. To design a bionic prosthetic leg, a biomechanical analysis of work is needed to obtain a walking pattern in humans and an analysis of the structure and working material to obtain a safe and comfortable material for use in a bionic prosthetic foot. This bionic leg prosthetic uses an automatic system using an Electromyography (EMG) sensor as a signal picker for the muscles, Arduino Mega 2560 as an input signal processor which is then converted into an output signal and Planetary gear as a knee joint transmission so that the body does not fall forward or backward. The results of the analysis using Autodesk Inventor software on the prosthetic of the bionic leg can withstand a pressure of 404.526 MPa, withstand a reaction force of 354.576 N and a reaction moment of 15.4073 N. So based on the results of the bionic prosthetic leg is very safe and comfortable when used on people with disabilities.
Variation of compaction pressure on hardness and wear of motorcycle disc brake pads
Authors: Alvandi  , Setiyawan Khanif , Nugroho Andi , Binyamin
Published: July 2023

The reason for this study was to decide the impact of coconut shell powder molecule size on the hardness and wear pace of aluminum epoxy based composites. This study employs four particle size configurations in an experimental approach. Commercial powders with a 100 m molecular size make up the arrangement. The highest and lowest hardness values that were achieved, respectively, were 195 kg/mm2, 198 kg/mm2, and 203 kg. However, the wear rates of 0.85,0.67, and 0.63 are the highest and lowest. Since specimens with a pressure of 203 produce the highest average hardness, it can be deduced that the hardness number shown is proportional to the greater pressure/compression treatment. In contrast, the specific wear value added for the thirst test is influenced by the presence of increased traction as a result of the pressing and compacting treatment.
Prácticas pedagógicas basadas en el análisis didáctico y el pensamiento complejo. Una propuesta de registro de observación
Authors: Sepúlveda Irribarra Cristian
Published: July 2023

El presente ensayo pretende revisar y analizar las propuestas de diversos investigadores en torno a categorías de análisis que faciliten la implementación de procesos de observación de prácticas pedagógicas desde un enfoque crítico. En esta línea, se han considerado categorías que interpelan al investigador a adoptar una mirada integral en los procesos de análisis y de observación de aula. Con base en lo anterior, se propone un ejercicio heurístico y, a su vez, ecléctico, el cual se traduce en conciliar categorías de análisis para una propuesta de instrumento de registro de observación de prácticas pedagógicas, adaptable a las necesidades de cada investigador. Para ello, se analiza: la eficacia y andamiaje teórico que sugiere el pensamiento complejo, las herramientas del análisis didáctico, los principios de la multirreferencialidad y la integración de algunas categorías del dispositivo antropológico CLEHES. Todos estos, en su conjunto, dan origen a un instrumento que pretende ser de utilidad a los investigadores que ingresen al campo de la observación de aula y que, regular o esporádicamente, implementen procesos observacionales de prácticas pedagógicas. Se concluye que las categorías analizadas en el presente artículo contribuyen a ampliar la mirada en torno a los instrumentos de observación de prácticas pedagógicas, abriendo miradas analíticas e interpretativas más que evaluativas y que, consecuentemente, serán enriquecedoras para los procesos observacionales de aquellos que emprendan la compleja tarea de analizar procesos didácticos realizados en aulas de diversos grados.
The Implementation of Effective Online Asynchronous Corrective Feedback on the Oral Production of English as a Foreign Language Learners in University Virtual Speaking Classes
Authors: Ugalde Ramos Óscar Abel
Published: July 2023

This article had as main aim that of identifying the effectiveness of asynchronous corrective feedback on the oral production of university students taking an online integrated English course as part of their program. All research instruments and tested corrective feedback method were applied in the speaking section of the course that had a duration of sixteen weeks. The study followed a mixed-methods design, where qualitative data was gathered by means of a leaners’ speech analysis scale, while quantitative data was gathered through a questionnaire addressing language learners´ preferences in relation to corrective feedback in oral English classes. A first oral test and final oral test were also used as pre-test and post-test to measure the level of improvement after the intervention phase. Opposed to Nunan’s (1992) position towards the use of positive feedback instead of corrective feedback, the present research project was underlaid by the conception that teachers’ reactions and reflections on learners’ deviant forms of the target language are a crucial part of the whole language learning spectrum.  Very interesting findings were shed, first, for the two main types of errors analyzed in the study (Grammar and Vocabulary, and Pronunciation), there was a diminution in quantity when comparing the results from the first exam to those of the final exam, representing those learners committed 10% less errors in the final oral exam.  Unsurprisingly, students unanimously favored the use of corrective feedback in their language classes. However, preferences on synchronous and asynchronous corrective feedback showed no major difference.
Cultura libre en la producción académica, una alternativa motivacional para potenciar la producción académica mediante el socioconstructivismo, la significatividad del aprendizaje y la mediación docente
Authors: Gutiérrez Luis
Published: July 2023

El plagio constituye una problemática asociada a diversas causas y motivaciones que inciden notablemente en estudiantes con cierta vulnerabilidad ante dicha práctica. Este ensayo presenta una alternativa para su abordaje desde un enfoque divergente, el cual puede ser incorporado por las instituciones educativas a nivel curricular y los docentes puedan recurrir en su cotidianidad. Dicho enfoque se sustenta en el universo de la cultura libre, el aprendizaje significativo, el socioconstructivismo y la implementación de un sistema de motivación en el cual el estudiante comprenda y reflexione sobre la producción académica y se desligue del discurso punitivo y la perspectiva sancionatoria. Para ello, se planteó como objetivo motivar a la persona estudiante en el proceso de construcción de conocimientos, con una clara vocación hacia la contribución solidaria por medio de sus producciones académicas. La principal conclusión del escrito constituye el reconocimiento del plagio como un problema complejo que requiere la autocrítica y la responsabilidad por parte de las instituciones educativas de orden superior, de modo que se solventen las falencias y debilidades en las literacidades que arrastra el estudiantado desde niveles educativos inferiores. Además, estimular el umbral de motivación en la persona aprendiente, mediante un cambio discursivo que, desde la mediación pedagógica y el aprovechamiento de la cultura libre y acceso abierto, enriquezca la producción y divulgación académica, en donde el único aspecto de control sea mediado por el respeto a la integridad de los productos puestos a disposición y la correspondiente autoría de quien los produce.
Simulador de doble clic para adultos mayores con limitaciones motoras manuales
Authors: D’Angelo Masuh Verónica
Published: July 2023

La presente sistematización de experiencia evaluó la utilización de un dispositivo eléctrico/electrónico de bajo costo, anexado a un mouse de computadora, para facilitar la utilización del mouse por parte de personas mayores con dificultades motoras manuales específicas, quienes encuentran limitaciones a la hora de realizar el doble clic (carecen de fuerza suficiente para generar la velocidad necesaria de pulsado). La población observada fue 76 adultos, de entre 60 y 85 años. El objetivo de la observación fue analizar la adecuación de la nueva herramienta a las necesidades de los participantes desde una perspectiva socio-técnica e interdisciplinar. La recolección de datos se basó en entrevistas grupales y en encuestas. Se halló que los participantes mayores de 70 años manifestaron preferencia por el nuevo dispositivo respecto del mouse, mientras que el grupo de 60-70 manifestó una preferencia por el mouse tradicional. Este resultado es coherente con la evidencia de la dificultad para el doble cliqueo especialmente a partir de los 70 años. Se concluye que esta diferencia en la percepción de la ayuda técnica (simulador de doble clic) advierte: sobre (a) la necesidad de una segmentación apropiada de los cursos de informática para adultos mayores teniendo en cuenta como criterio, por ejemplo, las habilidades operativas de los participantes; y sobre (b) la importancia de realizar un diagnóstico previo de las mismas, para determinar en qué casos utilizar ayudas técnicas y cuáles son las más apropiadas.
Evaluación de la investigación formativa en Educación Superior a Distancia y en Línea en América Latina y el Caribe
Authors: Morocho Quezada Mary , Camacho Condo Albania
Published: July 2023

La formación en investigación es fundamental en la calidad de la educación superior. Es desde esta concepción que la investigación formativa se encuentra inherente en los currículos de formación profesional de las diversas áreas del conocimiento, contribuyendo de esta forma a los fines propios de la actividad docente, y ofreciendo al estudiante la posibilidad de adquirir un conjunto de habilidades investigativas y competencias, orientadas a promover el desarrollo de los conocimientos teóricos en el ejercicio de la actividad académica. La investigación formativa, al constituirse en un proceso no improvisado, debe también tener muy en claro cuáles son los estándares que permiten demostrar que efectivamente los estudiantes han desarrollado los conocimientos y las habilidades investigativas; bajo este precepto, los sistemas de evaluación de la región consideran dentro de su estructura un conjunto de aspectos a evaluar que permiten evidenciar el desarrollo de la investigación formativa en las instituciones de educación superior. El presente editorial científico analiza de manera sistemática los modelos de evaluación de la educación a distancia y en línea a nivel regional, desarrollados y puestos en práctica por las agencias de evaluación y acreditación, y con base en este conjunto de dimensiones, características, factores, estándares e indicadores, determinar mediante un análisis comparativo cómo se realiza la evaluación de investigación formativa en educación superior a distancia en América Latina y el Caribe.