bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis, Crystal Structure, Quantum Chemical Analysis, Electrochemical Behavior, and Antibacterial and Photocatalytic Activity of Co Complex with Pyridoxal-(S-Methyl)-isothiosemicarbazone Ligand
Authors: Jevtović Violeta , Hamoud Haneen , Al-Zahrani Salma , Alenezi Khalaf , Latif Salman , Alanazi Tahani , Abdulaziz Fahad , Dimić Dušan
Published: July 2022

New complex Co(III) with ligand Pyridoxal-S-methyl-isothiosemicarbazone, (PLITSC) was synthesized. X-ray analysis showed the bis-ligand octahedral structure of the cobalt complex [Co(PLITSC-H)2]BrNO3·CH3OH (compound 1). The intermolecular interactions governing the crystal structure were described by the Hirsfeld surface analysis. The structure of compound 1 and the corresponding Zn complex (([Zn(PLTSC)(H2O)2]SO4·H2O)) were optimized at the B3LYP/6–31 + G (d,p)/LanL2DZ level of theory, and the applicability was assessed by comparison with the crystallographic structure. The natural bond orbital analysis was used for the discussion on the stability of formed compounds. The antibacterial activity of obtained complexes towards S. aureus and E. coli was determined, along with the effect of compound 1 on the formation of free radical species. Activity of compound 1 towards the removal of methylene blue was also investigated. The voltammograms of these compounds showed the reduction of metal ions, as well as the catalyzed reduction of CO2 in acidic media.
Interdiction in the Early Folding of the p53 DNA-Binding Domain Leads to Its Amyloid-Like Misfolding
Authors: Bergasa-Caceres Fernando , Rabitz Herschel A.
Published: July 2022

In this article, we investigate two issues: (a) the initial contact formation events along the folding pathway of the DNA-binding domain of the tumor suppressor protein p53 (core p53); and (b) the intermolecular events leading to its conversion into a prion-like form upon incubation with peptide P8(250-257). In the case of (a), the calculations employ the sequential collapse model (SCM) to identify the segments involved in the initial contact formation events that nucleate the folding pathway. The model predicts that there are several possible initial non-local contacts of comparative stability. The most stable of these possible initial contacts involve the protein segments 159AMAIY163 and 251ILTII255, and it is the only native-like contact. Thus, it is predicted to constitute “Nature’s shortcut” to the native structure of the core domain of p53. In the case of issue (b), these findings are then combined with experimental evidence showing that the incubation of the core domain of p53 with peptide P8(250-257), which is equivalent to the native protein segment 250PILTIITL257, leads to an amyloid conformational transition. It is explained how the SCM predicts that P8(250-257) effectively interdicts in the formation of the most stable possible initial contact and, thereby, disrupts the subsequent normal folding. Interdiction by polymeric P8(250-257) seeds is also studied. It is then hypothesized that enhanced folding through one or several of the less stable contacts could play a role in P8(250-257)-promoted core p53 amyloid misfolding. These findings are compared to previous results obtained for the prion protein. Experiments are proposed to test the hypothesis presented regarding core p53 amyloid misfolding.
Efficacy of Biologically Active Food Supplements for People with Atherosclerotic Vascular Changes
Authors: Pleshkova Natalia , Tokhiriyon Boisjoni , Vekovtsev Andrei , Poznyakovsky Valeriy Mikhailovich , Lapina Valentina , Takaeva Madina Atlaevna , Sorokopudov Vladimir Nikolaevich , Karanina Elena Valeryevna
Published: July 2022

The current paper deals with the development of a new biologically active food supplement (BAFS) aimed at treating atherosclerosis. Since atherosclerosis is considered to be a disease of aging, the composition of the supplement includes such essential minerals as magnesium and potassium, which are commonly used to prevent atherosclerosis, as well as vitamins C, E and the B-group vitamins in order to address the needs of the elderly. The authors outline the supplement-manufacturing technology and discuss the clinical trial undertaken by patients, aged about 60 years, with peripheral atherosclerosis. The research methodology focuses on studying the effectiveness of the developed supplement by assessing the influence of the active ingredients on treating metabolic disorders. To establish the efficacy of the supplement, blood tests, ultrasound and physical examinations were applied. The combination therapy resulted in improved metabolism and an overall better performance of the cardiovascular system; therefore, the BASF can be recommended as part of combination therapy to prevent and treat atherosclerotic and age-related changes in blood vessels.
The Potential of Spirulina platensis to Ameliorate the Adverse Effects of Highly Active Antiretroviral Therapy (HAART)
Authors: Sibiya Thabani , Ghazi Terisha , Chuturgoon Anil
Published: July 2022

The human immunodeficiency virus (HIV) is one of the most prevalent diseases globally. It is estimated that 37.7 million people are infected with HIV globally, and 8.2 million persons are infected with the virus in South Africa. The highly active antiretroviral therapy (HAART) involves combining various types of antiretroviral drugs that are dependent on the infected person’s viral load. HAART helps regulate the viral load and prevents its associated symptoms from progressing into acquired immune deficiency syndrome (AIDS). Despite its success in prolonging HIV-infected patients’ lifespans, the use of HAART promotes metabolic syndrome (MetS) through an inflammatory pathway, excess production of reactive oxygen species (ROS), and mitochondrial dysfunction. Interestingly, Spirulina platensis (SP), a blue-green microalgae commonly used as a traditional food by Mexican and African people, has been demonstrated to mitigate MetS by regulating oxidative and inflammatory pathways. SP is also a potent antioxidant that has been shown to exhibit immunological, anticancer, anti-inflammatory, anti-aging, antidiabetic, antibacterial, and antiviral properties. This review is aimed at highlighting the biochemical mechanism of SP with a focus on studies linking SP to the inhibition of HIV, inflammation, and oxidative stress. Further, we propose SP as a potential supplement for HIV-infected persons on lifelong HAART.
Legumes—A Comprehensive Exploration of Global Food-Based Dietary Guidelines and Consumption
Authors: Hughes Jaimee , Pearson Emma , Grafenauer Sara
Published: July 2022

Despite the well-known human and planetary health benefits of legumes, consumption is often low. This scoping review aimed to evaluate the inclusion of legumes in global food-based dietary guidelines (FBDG), and to review consumption data against global food group classifications for legumes. The review of FBDG from 94 countries identified legume-based key messaging, the key terms used to define legumes, recommended serving size and frequency of consumption and the classification of legumes into food groups as depicted by food guides. The 2018 Global Dietary Database isolated consumption data of legumes and beans using individual-level, nationally representative dietary survey data for matched countries. Food-based dietary guidelines from 40/94 countries most often identified legumes utilising the term legumes, followed by beans (n = 13), pulses (n = 10), or as beans, peas and lentils (n = 5). The serving size recommendations for legume consumption varied widely, and there was no consistency in the suggested frequency of consumption. Median bean and legume consumption for countries with FBDG ranged from 1.2 g/d (Norway) to 122.7 g/d (Afghanistan). Classification of legumes into food groups varied, with 38% of countries categorising legumes in the protein-rich food group, 20% were in a group on their own and 15% were in the starchy staples group. In countries where legumes were together with either nuts or seeds had the greatest range in intake (11.6–122.7 g/day), followed by those that grouped legumes together with protein-rich foods (4.0–104.7 g/day), while countries that grouped legumes into two food groups, in an attempt to promote consumption, tended to have a lower consumption. Greater emphasis and perhaps repositioning of legumes in dietary guidelines may be required to encourage consumption for health, environmental and economic benefits.
Association of Dietary Fiber Intake with All-Cause Mortality and Cardiovascular Disease Mortality: A 10-Year Prospective Cohort Study
Authors: Kwon Yu-Jin , Lee Hye-Sun , Park Goeun , Kim Hyung-Mi , Lee Ji-Won
Published: July 2022

Although previous studies have established that dietary fiber (DF) intake reduces the total cardiovascular disease (CVD) mortality in general populations, limited studies have been conducted in individuals with pre-existing chronic conditions, especially in Asian countries. We aimed to investigate the association of DF intake with all-cause and CVD mortality in the general population and in the subpopulation with hypertension, diabetes, and dyslipidemia. We examined the relationship between DF intake and all-cause and CVD mortality using the Korean genome and epidemiology study. Diet was assessed using a food-frequency questionnaire at baseline. Cox proportional hazard models were used to estimate the hazard ratio (HR) and 95% confidence intervals (CIs) after adjusting for confounders. During the mean 10.1 years of follow-up, higher DF intake was significantly associated with a lower risk of all-cause mortality after adjusting for confounders (HR and 95% CIs for Q5 vs. Q1: 0.84 (0.76–0.93); p < 0.001). DF intake was inversely associated with a lower risk of CVD mortality after adjusting for the same confounders (HR and 95% CIs for Q5 vs. Q1: 0.61 (0.47–0.78); p < 0.001). Total DF intake was inversely associated with all-cause and CVD mortality in middle-aged and older adults.
The Occurrence of Hyperactivated Platelets and Fibrinaloid Microclots in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS)
Authors: Nunes Jean , Kruger Arneaux , Proal Amy , Kell Douglas , Pretorius Etheresia
Published: July 2022

We have previously demonstrated that platelet-poor plasma (PPP) obtained from patients with Long COVID/Post-Acute Sequelae of COVID-19 (PASC) is characterized by a hypercoagulable state and contains hyperactivated platelets and considerable numbers of already-formed amyloid fibrin(ogen) or fibrinaloid microclots. Due to the substantial overlap in symptoms and etiology between Long COVID/PASC and ME/CFS, we investigated whether coagulopathies reflected in Long COVID/PASC—hypercoagulability, platelet hyperactivation, and fibrinaloid microclot formation—were present in individuals with ME/CFS and gender- and age-matched healthy controls. ME/CFS samples showed significant hypercoagulability as judged by thromboelastography of both whole blood and platelet-poor plasma. The area of plasma images containing fibrinaloid microclots was commonly more than 10-fold greater in untreated PPP from individuals with ME/CFS than in that of healthy controls. A similar difference was found when the plasma samples were treated with thrombin. Using fluorescently labelled PAC-1, which recognizes glycoprotein IIb/IIIa, and CD62P, which binds P-selectin, we observed hyperactivation of platelets in ME/CFS hematocrit samples. Using a quantitative scoring system, the ME/CFS platelets were found to have a mean spreading score of 2.72 ± 1.24 vs. 1.00 (activation with pseudopodia formation) for healthy controls. We conclude that ME/CFS is accompanied by substantial and measurable changes in coagulability, platelet hyperactivation, and fibrinaloid microclot formation. However, the fibrinaloid microclot load was not as great as was previously noted in Long COVID/PASC. Fibrinaloid microclots, in particular, may contribute to many ME/CFS symptoms, such as fatigue, seen in patients with ME/CFS, via the (temporary) blockage of microcapillaries and hence ischemia. Furthermore, fibrinaloid microclots might damage the endothelium. The discovery of these biomarkers represents an important development in ME/CFS research. It also points to possible uses for treatment strategies using known drugs and/or nutraceuticals that target systemic vascular pathology and endothelial inflammation.
Advances in Development, Characterisation and Application of Nasal Drug Delivery Systems
Authors: Hafner Anita
Published: July 2022

Nasal drug administration is being extensively investigated for local and systemic drug delivery, brain targeting and mucosal vaccination [...]
Clinical Evaluation of Cement-Retained Implant-Supported CAD/CAM Monolithic Zirconia Single Crowns in Posterior Areas: Results of a 6-Year Prospective Clinical Study
Authors: Sorrentino Roberto , Ruggiero Gennaro , Toska Eralda , Leone Renato , Zarone Fernando
Published: July 2022

Background: Different technologies and materials can be used for implant-supported restorations in posterior areas. Our study aimed to evaluate the clinical performance of CAD/CAM implant-supported monolithic zirconia single crowns (ZrSCs) cemented onto titanium abutments with a dual-curing resin cement after 6 years of use. Methods: Fifty patients in need of one single crown in posterior regions were enrolled. The patients were recalled for a follow-up after 6 months and then yearly for a total observation period of 6 years. The biological and technical complications were examined using criteria set by the United States Public Health Service (USPHS), whereas visual analogue scales (VASs) were used to evaluate the patients’ aesthetic and functional satisfaction. Results: No patient was lost at follow-up; both the survival and success rates were 100%. No fractures, decementation, peri-implantitis, or soft tissue inflammation were recorded. Forty-six restorations were rated Alpha in each evaluated parameter of the USPHS’s criteria. According to the patients’ VASs assessments, the overall function of the ZrSCs was 8.4 (±2.1), whereas the overall aesthetic was 8.7 (±0.7). Conclusions: Monolithic zirconia single crowns cemented with dual-curing resin cements onto titanium abutments can be considered an effective clinical option in posterior regions after 6 years of function.
Sentinel-Based Adaptation of the Local Climate Zones Framework to a South African Context
Authors: Manyanya Tshilidzi , Teerlinck Janne , Somers Ben , Verbist Bruno , Nethengwe Nthaduleni
Published: July 2022

The LCZ framework has become a widely applied approach to study urban climate. The standard LCZ typology is highly specific when applied to western urban areas but generic in some African cities. We tested the generic nature of the standard typology by taking a two-part approach. First, we applied a single-source WUDAPT-based training input across three urban areas that represent a gradient in South African urbanization (Cape Town, Thohoyandou and East London). Second, we applied a local customized training that accounts for the unique characteristics of the specific area. The LCZ classification was completed using a random forest classifier on a subset of single (SI) and multitemporal (MT) Sentinel 2 imagery. The results show an increase in overall classification accuracy between 17 and 30% for the locally calibrated over the generic standard LCZ framework. The spring season is the best classified of the single-date imagery with the accuracies 7% higher than the least classified season. The multi-date classification accuracy is 13% higher than spring but only 9% higher when a neighborhood function (NF) is applied. For acceptable performance of the LCZ classifier in an African context, the training must be local and customized to the uniqueness of that specific area.
A New Method of Rainfall Detection from the Collected X-Band Marine Radar Images
Authors: Wei Yanbo , Liu Yalin , Lei Yifei , Lian Ruiyao , Lu Zhizhong , Sun Lei
Published: July 2022

To control the quality of X-band marine radar images for retrieving information and improve the inversion accuracy, the research on rainfall detection from marine radar images is investigated in this paper. Currently, the difference in the correlation characteristic between the rain-contaminated radar image and the rain-free radar image is utilized to detect rainfall. However, only the correlation coefficient at a position in the lagged azimuth is utilized, and a statistical hard threshold is adopted. By deeply investigating the difference between the calculated correlation characteristic and the marine radar images, the correlation coefficient in the lagged azimuth can be used to constitute the correlation coefficient feature vector (CCFV). Then, an unsupervised K-means clustering learning method is used to obtain the clustering centers. Based on the constituted CCFV and the K-means clustering algorithm, a new method of rainfall detection from the collected X-band marine radar images is proposed. The acquired X-band marine radar images are utilized to verify the effectiveness of the proposed rainfall detection method. Compared with the zero-pixel percentage (ZPP) method, the correlation coefficient difference (CCD) method, the support vector machine (SVM) method and the wave texture difference (WTD) method, the experimental results demonstrate that the proposed method could finish the task of rainfall detection, and the detection accuracy increases by 10.0%, 6.3%, 2.0% and 0.6%, respectively, for the proportion of the 25% training dataset.
Virtual Reality Game for Physical and Emotional Rehabilitation of Landmine Victims
Authors: Pérez Vera Z. , Yepes Juan C. , Vargas John F. , Franco Juan C. , Escobar Natalia I. , Betancur Leonardo , Sánchez Juanita , Betancur Manuel J.
Published: July 2022

Landmine victims require an engaging and immersive rehabilitation process to maintain motivation and therapeutic adherence, such as virtual reality games. This paper proposes a virtual reality exercise game called Exogames, which works with Nukawa, a lower limb rehabilitation robot (LLRR). Together, they constitute the general Kina system. The design and development process of Exogames is reported, as well as the evaluation of its potential for physical and emotional rehabilitation. In an initial survey designed ad-hoc, 13 health professionals evaluated compliance with various requirements. They agreed that Exogames would help the user focus on rehabilitation by providing motivation; 92.3% said that the user will feel safe in the virtual world, 66.7% of them agreed or totally agreed that it presents characteristics that may enhance the physical rehabilitation of lower limbs for amputees, 83.3% stated that it would promote the welfare of landmine victims, and 76.9% responded that the graphical interface and data report are useful for real-time assessment, and would be helpful for four interventional areas in all rehabilitation stages. In a second evaluation, using standardized surveys, five physical therapists and one lower limb amputee tried the Kina system as users. They filled out the System Usability Scale (SUS), the Physical Activity Enjoyment Scale (PACES), and the Game Experience Questionnaire (GEQ). The usability of the Kina system overall score was 69 (66, 79) out of 100, suggesting an acceptable though improvable usability. The overall PACES score of 110 (108, 112) out of 126 suggests that users enjoyed the game well. Finally, users indicated a positive effect with a good sense of immersion and smooth of gameplay during the tests, as indicated by the GEQ results. In summary, the evaluations showed that Exogames has the potential to be used as a virtual reality game for the physical and emotional rehabilitation of landmine victims.
Heartbeat Classification and Arrhythmia Detection Using a Multi-Model Deep-Learning Technique
Authors: Irfan Saad , Anjum Nadeem , Althobaiti Turke , Alotaibi Abdullah Alhumaidi , Siddiqui Abdul Basit , Ramzan Naeem
Published: July 2022

Cardiac arrhythmias pose a significant danger to human life; therefore, it is of utmost importance to be able to efficiently diagnose these arrhythmias promptly. There exist many techniques for the detection of arrhythmias; however, the most widely adopted method is the use of an Electrocardiogram (ECG). The manual analysis of ECGs by medical experts is often inefficient. Therefore, the detection and recognition of ECG characteristics via machine-learning techniques have become prevalent. There are two major drawbacks of existing machine-learning approaches: (a) they require extensive training time; and (b) they require manual feature selection. To address these issues, this paper presents a novel deep-learning framework that integrates various networks by stacking similar layers in each network to produce a single robust model. The proposed framework has been tested on two publicly available datasets for the recognition of five micro-classes of arrhythmias. The overall classification sensitivity, specificity, positive predictive value, and accuracy of the proposed approach are 98.37%, 99.59%, 98.41%, and 99.35%, respectively. The results are compared with state-of-the-art approaches. The proposed approach outperformed the existing approaches in terms of sensitivity, specificity, positive predictive value, accuracy and computational cost.
Research on Methane Measurement and Interference Factors in Coal Mines
Authors: Wu Xiushan , Cui Jiamin , Tong Renyuan , Li Qing
Published: July 2022

The detection of methane has always been an important part of coal mine safety. In order to improve the methane measurement accuracy in coal mines and to determine the influence of environmental interference factors on the measurement results, we designed a spherical, experimental chamber simulating the on-site environment of an underground coal mine containing methane, in which various environmental interference factors can be superimposed. The simulation chamber can generate a uniform and controllable dust environment, a controllable methane environment with concentrations below that which would trigger an alarm, controllable humidity, and environments characterized by other interference factors. Based on computational simulations of the experimental chamber with varying dust-particle-concentration distributions using a single particle size, an optimal design for the chamber has been realized in terms of the rapid mixing of dust and the flow field. Finally, we constructed an underground methane concentration measurement system for coal mines and assessed the influences of different dust concentrations and relative humidity values on the performance of methane measurements, providing a means for improving the measurement accuracy of underground coal mine, spectral, absorption-type methane sensors.
Land Cover Classification from Very High-Resolution UAS Data for Flood Risk Mapping
Authors: Belcore Elena , Piras Marco , Pezzoli Alessandro
Published: July 2022

Monitoring the world’s areas that are more vulnerable to natural hazards has become crucial worldwide. In order to reduce disaster risk, effective tools and relevant land cover (LC) data are needed. This work aimed to generate a high-resolution LC map of flood-prone rural villages in southwest Niger using multispectral drone imagery. The LC was focused on highly thematically detailed classes. Two photogrammetric flights of fixed-wing unmanned aerial systems (UAS) using RGB and NIR optical sensors were realized. The LC input dataset was generated using structure from motion (SfM) standard workflow, resulting in two orthomosaics and a digital surface model (DSM). The LC system is composed of nine classes, which are relevant for estimating flood-induced potential damages, such as houses and production areas. The LC was generated through object-oriented supervised classification using a random forest (RF) classifier. Textural and elevation features were computed to overcome the mapping difficulties due to the high spectral homogeneity of cover types. The training-test dataset was manually defined. The segmentation resulted in an F1_score of 0.70 and a median Jaccard index of 0.88. The RF model performed with an overall accuracy of 0.94, with the grasslands and the rocky clustered areas classes the least performant.
Presentation of the Citizens’ administrative law circle
Authors: Nikolova Raina
Published: July 2022

The Citizens’ administrative law circle is a first of its kind non-lecture initiative for the students at the Master’s Program in Law of the New Bulgarian University who are interested in the administrative rights and obligations of citizens. It aims to unite the aspirations of future lawyers to acquire specialized scientific knowledge about the administrative legal status of the individuals; to provoke their increased interest in discussing issues affecting the personal, political, economic, social and cultural administrative rights and obligations of citizens; to develop the intellectual potential of its participants by stimulating the creative impulses of some of them to produce publications; to become an influential forum and an authoritative intellectual centre for the curious and educated members of the University’s student, academic and scientific community.
Rock clubs as a phenomenon of Russian Artistic culture at the turn of the XX-XXI centuries (on the example of St. Petersburg)
Authors:   NOU VPO ", Savina Elena Grigorievna ,   Saint Petersburg Humanitarian University of Trade Unions",   , Russia
Published: July 2022

The article discusses the problems of modern rock music and rock clubs (on the example of St. Petersburg) as a phenomenon of the national artistic culture of the turn of the XX–XXI centuries. The main stages of the formation of the Leningrad-Petersburg club rock movement are given, the classification of modern rock clubs of St. Petersburg is proposed, the definition of an acoustic rock concert is given. It is concluded that the originally formed subcultural rock movement in the XXI century becomes part of the mass industry exploiting its achievements.
Russian Culture of the XIX century: a dialogue with a Western Publisher, Spectator and Student
Authors:   Samara State University named after Academician S. P. Korolev (National Research University), Russia, Skotnikova Nina Stanislavovna
Published: July 2022

Review of Elena Burlina's monograph "The Existence of Russia in the Mirror of Genres. XIX century" (Lap-Lambertus Publishing, Germany, 2011).
B-learning como estrategia para mejorar el aprendizaje de un idioma extranjero en estudiantes de Educación Básica de la Unidad Educativa Jean Piaget
Authors: Castillo Medranda Eliana Melissa , Tubay Álvarez María Elena
Published: July 2022

El aprendizaje de un idioma extranjero forma parte importante en la formación integral de los educandos y se lleva a la práctica dentro del aula de clases, por lo que el estudiante tiene la oportunidad de su formación en una lengua ajena a la materna en un espacio y tiempo limitado, restringiéndose su práctica fuera del aula. Desde la noción precedente se planteó como objetivo general, determinar la influencia del método Blended-learning al mejoramiento del aprendizaje de un idioma extranjero en estudiantes de educación básica de la Unidad Educativa Jean Piaget. 2019, para dar cumplimiento a lo propuesto se utilizó un tipo de investigación mixta, con técnicas cualitativas, aplicación de un diagnóstico FODA (Fortalezas, Oportunidades, Debilidades, Amenazas), y cuantitativas con encuesta online. Entre las principales conclusiones se destaca que el análisis FODA, aplicado a la Unidad Educativa Jean Piaget y la encuesta online a los estudiantes, sirvieron de base para comprender como influyen las TIC, en los procesos de enseñanza aprendizaje, y debido a que los estudiantes son considerados como una generación de nativos digitales, están predispuestos a utilizar herramientas tecnológicas como el B-learning, con el fin de obtener más y mejores competencias en el aprendizaje de un idioma extranjero.

PALABRAS CLAVE: Idioma extranjero; herramientas tecnológicas; estudiantes; TIC; b-learning.

B-learning as a strategy to improve the learning of a foreign language in Basic Education students of the Jean Piaget Educational Unit

ABSTRACT

The learning of a foreign language is an important part of the comprehensive training of students and is put into practice in the classroom, so that the student can learn in a foreign language to the mother tongue in a space and limited time, restricting their practice outside the classroom. From the previous notion, the general objective was to determine the influence of the Blended-learning method to improve the learning of a foreign language in basic education students of the Jean Piaget Educational Unit. 2019, to comply with the proposal, a type of mixed research was used, with qualitative techniques, application of a SWOT diagnosis (Strengths, Weaknesses, Opportunities, Threats), and quantitative techniques with an online survey. Among the main conclusions, it is highlighted that the SWOT analysis, applied to the Jean Piaget Educational Unit and the online survey of students, served as the basis for understanding how ICTs influence the teaching-learning processes, and because students are considered as a generation of digital natives, they are predisposed to use technological tools such as B-learning, to obtain more and better skills in learning a foreign language.

KEYWORDS: Foreign language; technological tools; student; TIC; b-learning.
Estudio de disponibilidad léxica en alumnos de primer año de la carrera de Periodismo de la Universidad de Matanzas, Cuba
Authors: Perdomo Casanova Noraida , Domínguez García Ileana , Alfonso Ramos Rosa Elvira
Published: July 2022

Este artículo presenta los resultados del léxico disponible en dieciocho centros de interés, de los estudiantes de primer año de la carrera de Periodismo y valora el léxico individual de cada informante. La metodología empleada es la del Proyecto Panhispánico. La información se procesó a través de la base de datos de Dispolex y se utilizó el lenguaje de programación R©, para determinar la disponibilidad léxica individual. La investigación realizada demostró que los estudios lexicométricos de disponibilidad léxica continúan siendo una herramienta importante de la Lingüística aplicada a la Didáctica de la lengua materna porque además de poder determinar el índice de disponibilidad de un vocablo, así como el léxico disponible de una comunidad; también se puede evaluar el desarrollo léxico de los aprendices en un determinado período.

PALABRAS CLAVE: léxico disponible; léxico individual; desarrollo léxico.   

LEXICAL AVAILABILITY STUDY IN FIRST YEAR STUDENTS OF THE JOURNALISM DEGREE AT THE UNIVERSITY OF MATANZAS. CUBA

ABSTRACT

This article presents the results of the available lexicon in eighteen centers of interest, among first-year journalism students, and evaluates the individual lexicon of each participant. The methodology used was that of the Panhispanic Project. The information was processed through the Dispolex database and the R© programming language was used to determine the individual lexical availability. The research carried out showed that lexicometric studies of lexical availability are still an important tool of Linguistics applied to the Didactics of the mother tongue because besides making possible to determine the index of availability of a word, as well as the available lexicon of a community; it makes also possible to evaluate the lexical development of the learners in a given period.

KEYWORDS: available lexicon; individual lexicon; lexicon development.
COVID-19 y los desafíos de la docencia infantil en Ecuador
Authors: Sánchez Salazar Doménica Anthonella , Mayla Cajisaca Nathaly Silvana , Guerrón Varela Edgar Ramiro , Garcés Alencastro Alejandra Cristina
Published: July 2022

La presente investigación busca conocer los desafíos de la docencia infantil en Ecuador, en el marco de la pandemia COVID-19. Para ello se recolectaron datos por medio de la aplicación de una encuesta dirigida a 230 docentes de niños de 3-6 años. El estudio es de modalidad bibliográfica, nivel correlacional, descriptivo, con enfoque cuantitativo y cualitativo. Para el análisis de datos se empleó el chi-cuadrado y V. de Cramer, para identificar el nivel de dependencia entre variables. En conclusión, se determinó la dependencia del acompañamiento de padres con la participación de los niños en clase y de las actividades de interacción con el nivel de logro en el ámbito curricular de convivencia. A su vez, no se evidenció la asociación esperada entre la incorporación de las TICs en la comunicación con la interacción docente-alumno, ni en el número de estrategias empleadas con el nivel de participación de clase.

PALABRAS CLAVE: Docencia; educación infantil; ambientes virtuales; tecnología; COVID-19.

COVID-19 and the challenges of teaching children in Ecuador

ABSTRACT

This research seeks to understand the challenges of early childhood education in Ecuador, in the framework of the COVID-19 pandemic. For that reason, data were collected through the application of a survey directed to 230 teachers of children aged 3-6 years. The study is of bibliographic modality, correlational level, descriptive, with a quantitative and qualitative approach. Chi-square and V. Cramer were used for data analysis to identify the level of dependence between variables. In conclusion, the dependence of the accompaniment of parents with the participation of the children in class and of the interaction activities with the level of achievement in the curricular area of ​​coexistence was determined. At the same time, the expected association between the incorporation of ICTs in communication and teacher-student interaction was not evidenced, nor was the number of strategies used with the level of class participation.

KEYWORDS: Teaching; early childhood education; virtual environments; technology; COVID-19.
Análisis empírico sobre la interacción de los estudiantes y elementos académicos en un curso infantil durante el confinamiento
Authors: Venegas Leslie Johanna , Analuisa Maiguashca Jessica Carolina , Larrea Astudillo Nelly Carolina , Cruz Báez Estefanía Rocío
Published: July 2022

El problema actual sobre la pandemia mundial acerca del Covid-19 tuvo un impacto en la cotidianidad escolar, lo que permitió el uso de plataformas digitales y el origen de programas educativos virtuales; por ello se creó el curso denominado Ciencia, experimentos y arte infantil compuesto de los módulos Pequeños científicos y Pequeños artistas. El objetivo de la investigación es analizar la interacción de los usuarios con elementos académicos entre los cuales están recursos educativos, tareas y evaluaciones. La metodología utilizada fue cuantitativa, con diseño no experimental, tipo de muestreo no probabilístico y por conveniencia. Se trabajó con una muestra de 348 niños de todas las provincias del Ecuador en edades de 5 a 7 años, los datos se recopilaron por medio de los registros de navegación que se representaron a través de sociogramas. Entre los resultados obtenidos, está que el módulo con mayor participación es Pequeños científicos y la interactividad en elementos académicos se desarrolla con mayor porcentaje en los recursos educativos de los dos módulos. Como conclusión se manifiesta que la temática que llamó más la atención es experimentos y ciencia; además se requiere planificación de actividades y acompañamiento de tutores para mayor interacción en cursos virtuales infantiles.

PALABRAS CLAVE: TIC, educación, primera infancia, innovación educacional.

Empirical analysis on the interaction of students and academic elements in a children's course during confinement.

ABSTRACT

The current problem with the global covid-19 pandemic had an impact on school daily life, which allowed the use of digital platforms and the origin of virtual educational programs; that is why the course Ciencia, experimentos y arte infantil composed of Pequeños científicos and Pequeños artistas modules was created. The objective of the research is to analyze the interaction of users with academic elements among which are educational resources, tasks, and evaluations. The methodology used was quantitative, with non-experimental design, type of non-probabilistic sampling and for convenience. A sample of 348 children from all provinces of Ecuador at ages 5 to 7 years were worked on, the data collected through navigation logs that were represented through sociograms. Among the results obtained, this is that the module with the greatest participation is Pequeños científicos and the interactivity in academic elements develops with a higher percentage in the educational resources of the two modules. As a conclusion it is manifested that the theme catches the most attention is experiments and science; In addition, planning of activities and accompanying tutors is required for greater interaction in virtual children's courses.

KEYWORDS: ICT; education; early childhood; educational innovation.
Estudio documental de la motivación en Educación Física: análisis de su evolución
Authors: Galeano-Terán Alex
Published: July 2022

Durante el proceso enseñanza aprendizaje la motivación ha sido analizada desde varias perspectivas científicas, estudios que han dado mayor importancia a la relación de los aspectos cognitivos y motivacionales en educación, por ello resulta fundamental conocer los principales instrumentos que permiten evaluar la motivación de los estudiantes. Este trabajo tiene como objetivo: Analizar aspectos importantes de la motivación, conocer su concepto definiéndolo a partir de concepciones de diferentes autores y precursores del estudio de la motivación hasta llegar a la aplicación en Educación Física. Posteriormente se examinaron los modelos explicativos y teóricos, así como los primeros autores que estudiaron la motivación, formas de evaluación, medición; y los beneficios que tiene en la práctica deportiva de la educación Física. La presente investigación utilizó como técnica de recolección de datos, el análisis documental cualitativo a través del estudio de los principales instrumentos de evaluación y teorías   de la motivación, examinando las principales bases de datos bibliográficas que recaban información científica como Dialnet, Web of Science y Scopus. Con el análisis realizado y la información obtenida se conoció la evolución y concepto de motivación, las principales teorías activas y reactivas y los principales instrumentos de evaluación aplicables a la Educación Física.
PALABRAS CLAVE: Motivación; Educación Física; Evaluación de la Motivación; Evolución de Motivación.
Documentary study of motivation in Physical Education
ABSTRACT
During the teaching-learning process, motivation has been analyzed from several scientific perspectives, studies that have given greater importance to the relationship of cognitive and motivational aspects in education, therefore it is essential to know the main instruments that allow evaluating student motivation. This work aims to: Analyze important aspects of motivation, know its concept defining it from the conceptions of different authors and precursors of the study of motivation until it reaches its application in Physical Education. Later the explanatory and theoretical models were examined as well as the first authors who studied the motivation, forms of evaluation, measurement; and the benefits that Physical education has in sports practice. This research used as a data collection technique, qualitative documentary analysis through the study of the main assessment instruments and motivation theories, examining the main bibliographic databases that collect scientific information such as Dialnet, Web of Science and Scopus. With the analysis carried out and the information obtained, the evolution and concept of motivation, the main active and reactive theories and the main evaluation instruments applicable to Physical Education were known.
KEYWORDS: Motivation; Physical education; Motivation Assessment; Evolution of Motivation.
Incidencia de ácaros en la pudrición de vaina en dos variedades de arroz (Oryza sativa L)
Authors: Durán Mera Christian Alejandro , Vivas Vivas María Leticia , RIVERA PIZARRO VICTOR HUGO
Published: July 2022

La pudrición de la vaina causada por Sarocladium oryzae, es una enfermedad que afecta al cultivo de arroz (Oryza sativa L), se relaciona por presencia del ácaro Steneotarsonemus spinki y aplicaciones excesivas de nitrógeno ya que en cantidades elevadas atrae al ácaro. El objetivo fue determinar la población de ácaros en dos variedades de arroz bajo la incidencia de la pudrición de la vaina, fertilización nitrogenada más la aplicación con y sin acaricida más rendimiento. Se utilizó un diseño de parcelas divididas con dos variedades de arroz, tres dosis de nitrógeno y dos aplicaciones de acaricida lo que totalizó 12 tratamientos con tres repeticiones para un total de 36 parcelas evaluadas. Las variables fueron números de ácaros tetraníquidos, predatores y tarsonémidos, porcentajes de espigas afectadas y rendimiento kg ha-1. Los resultados demostraron que la mayor cantidad de ácaros encontrados fueron 124 predatores en tres evaluaciones realizadas, el porcentaje de espigas afectadas 12% y rendimientos superaron 2500 kg ha-1, además no se pudo relacionar la presencia de la enfermedad con el ácaro Steneotarsonemus spinki debido a que solo se encontró un individuo.
 
Palabras clave: Sarocladium oryzae; Steneotarsonemus spinki; rendimiento.
Simulación del daño mecánico ocasionado por nemátodos al sistema radical del plátano en condiciones controladas
Authors: Delgado Párraga Alex Gabriel , Navia Daniel , Triviño Carmen , Peñaherrera Luis , Zambrano Mero Jessica Daniela
Published: July 2022

El desarrollo vegetativo del plátano se expone a factores bióticos, entre ellos los fitonemátodos responsables de causar daños al sistema radical, restringiendo absorción de agua, nutrientes y afectando el crecimiento. El objetivo del presente trabajo de investigación fue simular el daño mecánico que ocasionan los nemátodos al sistema radical en plátano bajo condiciones controladas. Para el efecto, se utilizaron plantas meristemáticas de plátano Barraganete de 45 cm de altura, sembradas en fundas plásticas con 40 L de suelo pasteurizado. Los tratamientos consistieron en el lavado más eliminación del 0, 25 y 50 % de la masa radical más un testigo absoluto. Dos meses después se evaluó el peso de raíces y crecimiento, observándose diferencias significativas, donde el tratamiento con 0 % de corte de raíces presentó menor peso (73,44 g) y altura (53 cm), en relación con los demás tratamientos con 155 g (en media) y 75 cm (en media). Posiblemente la manipulación de raíces en el 0 % de corte no fueron suficientes para estimular los mecanismos de defensas y crecimiento de la planta.
 
Palabras clave: Crecimiento; Plátano meristemático; Musa; Raíces; Simulación.
La hipocalcemia en vacas lecheras y sus alternativas diagnósticas en campo: Revisión
Authors: Gallegos Rosales Gilma Susana , Fonseca Restrepo Carolina
Published: July 2022

La hipocalcemia puerperal es una enfermedad metabólica de alta prevalencia en hatos lecheros que afecta de forma significativa la salud del animal y la rentabilidad de la explotación. Su diagnóstico es determinado por serología, siendo un método poco frecuente por la necesidad de tener un resultado rápido y oportuno para el tratamiento adecuado y de esa forma evitar la muerte del animal. La información sobre el calcio y su homeostasis, la hipocalcemia, métodos de prevención y herramientas diagnósticas disponibles de campo, fue recopilada en esta revisión literaria por medio de motores de búsqueda confiables. Las herramientas diagnósticas de campo descritas abarcan un amplio abanico de opciones en cuanto a costo, práctica y facilidad de implementación, logrando ofrecer estrategias de prevención de la enfermedad que permitirán un mejor manejo del hato con un impacto económico positivo.
 
Palabras clave: calcio; DCAD; fiebre de leche; hipocalcemia; EDTA.
Autoestima y recuperación para la reinserción social en mujeres del Centro de Rehabilitación Social de Portoviejo
Authors: Pinargote Macías Eleticia Isabel , Caicedo Guale Liliana Carolina , Bravo Mera Gema Marena
Published: July 2022

La autoestima está relacionada con los procesos psicosociales. El contexto carcelario genera tensión y efectos psicológicos que deterioran la autopercepción y la autoestima del individuo. Este estudio buscó determinar la influencia de la autoestima y la recuperación en la reinserción social de las mujeres privadas de libertad del Centro de Rehabilitación Social de Portoviejo. La metodología utilizada fue descriptiva, con enfoque cualitativo apoyado en el paradigma cuantitativo. Se trabajó con el método cuasiexperimental. La Escala de Autoestima de Rosenberg se utilizó para establecer los niveles de autoestima en 100 mujeres privadas de libertad. Los resultados denotaron un índice de baja autoestima de las internas. La entrevista con los responsables del área de tratamiento confirmó la intervención limitada en el procedimiento para fortalecer la autopercepción. Según los resultados obtenidos, se concluyó que este centro de rehabilitación social requiere la aplicación de un protocolo más efectivo que garantice la restauración y protección de la salud mental de las reclusas.
Soluciones informáticas para la toma de decisiones en el sistema hotelero cubano: Caso Restaurante Buffet 1514 del Hotel Memories Trinidad del Mar
Authors: Martínez Rodríguez María de los Angeles
Published: July 2022

Las soluciones informáticas se corresponden con la realidad actual y más en el sector turístico, se impone la necesidad de alcanzar niveles superiores, pues este constituye un renglón básico de desarrollo de la economía cubana. En este artículo se diseña e implementa un data marts con el esquema de estrella, a partir de un procedimiento que se rige por la Metodología de Kimball, y se apoya en la inteligencia de negocio con la aplicación de la herramienta de Pentaho. El resultado del trabajo es la gestión oportuna de la información de los consumos percápitas en el Restaurante Buffet “1514” del Hotel Memories Trinidad del Mar. Esto en forma de sistema de apoyo a la toma de decisiones y se sientan las bases para posteriormente crear un amplio almacén de datos con información histórica que permita un adecuado acceso a información confiable. Junto con la posibilidad de compartir información entre los componentes de la organización, la reducción de tiempos y los costes de los procesos. Los métodos de investigación del nivel teórico, empírico, estadísticos y matemáticos. El aporte radica en la contribución a un mejor desempeño de la industria del turismo en estudio.

 
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actividades de vinculación con la sociedad en la Universidad Técnica de Manabí
Authors: Rodríguez Indarte Eliecer David , Valarezo Molina Lucio Alfredo
Published: July 2022

En este artículo se realiza una revisión histórica de lo que han sido las actividades de extensión universitaria antes de la promulgación de la Ley Orgánica de Educación Superior. Posteriormente, se elabora un listado de las facultades de la Universidad Técnica de Manabí con el fin de enumerar los programas y proyectos que se han llevado a cabo desde el año 2011 al 2018 y luego hacer un análisis de lo sucedido en cada año relacionado con las variables que fueron presentadas. Como resultado de ese análisis se obtiene una disminución paulatina tanto en el número de programas como en el número de proyectos de vinculación desde el año 2011 al 2018, los cuales se justifican por la inexperiencia del personal de la institución en los primeros años en la realización de vinculación. proyectos. El desarrollo de estas actividades en esta área ha dejado nuevos conocimientos cada año que son una forma de mejorar los procesos donde la calidad tiene una importancia significativa sobre la cantidad cada vez. Se han desarrollado proyectos de vinculación acordes a las necesidades de la sociedad, ajustados a las líneas de investigación y con la participación de docentes, estudiantes y comunidad. En conclusión, las actividades de divulgación comunitaria continúan siendo tan importantes como lo fueron en el año 2011. Sin embargo, a lo largo de los años se ha tratado de ser más eficientes con los recursos para lograr un impacto significativo en la solución de las necesidades de la comunidad.