bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of Fruit and Vegetable Enzyme Supplementation on Aerobic Performance and Lactate Response in Older Adults Following High-Intensity Interval Exercise Through Exergaming: Randomized Experimental Matched-Pair Study
Authors: Lin Shu-Cheng , Wang Chien-Yen , Hou Tien-Hung , Chen Hong-Ching , Wang Chia-Chi
Published: April 2024

Background

Exercise offers substantial health benefits but can induce oxidative stress and inflammation, especially in high-intensity formats such as high-intensity interval exercise (HIIE). Exergaming has become an effective, enjoyable fitness tool for all ages, particularly older adults. Enzyme supplements may enhance exercise performance by improving lactate metabolism and reducing oxidative stress.

Objective

This study investigates the efficacy of fruit and vegetable enzyme supplementation in modulating fatigue and enhancing aerobic capacity in older adults following HIIE through exergaming.

Methods

The study recruited 16 older adult female participants and allocated them into 2 distinct groups (enzyme and placebo) based on their pretest lactate levels. This division used pairwise grouping to guarantee comparability between the groups, ensuring the integrity of the results. They engaged in HIIE using Nintendo Switch Ring Fit Adventure, performing 8 sets of 20 seconds of maximum effort exercise interspersed with 30 seconds of rest, totaling 370 seconds of exercise. Key metrics assessed included blood lactate levels, heart rate, rating of perceived exertion, and training impulse. Participants in the enzyme group were administered a fruit and vegetable enzyme supplement at a dosage of 30 mL twice daily over a period of 14 days.

Results

The enzyme group showed significantly lower blood lactate levels compared to the placebo group, notably after the fourth (mean 4.29, SD 0.67 vs mean 6.34, SD 1.17 mmol/L; P=.001) and eighth (mean 5.84, SD 0.63 vs mean 8.20, SD 1.15 mmol/L; P<.001) exercise sessions. This trend continued at 5 minutes (mean 6.85, SD 0.82 vs mean 8.60, SD 1.13 mmol/L; P=.003) and 10 minutes (mean 5.91, SD 1.16 vs mean 8.21, SD 1.27 mmol/L; P=.002) after exercise. Although both groups exceeded 85% of their estimated maximum heart rate during the exercise, enzyme supplementation did not markedly affect the perceived intensity or effort.

Conclusions

The study indicates that fruit and vegetable enzyme supplementation can significantly reduce blood lactate levels in older adults following HIIE through exergaming. This suggests a potential role for these enzymes in modulating lactate production or clearance during and after high-intensity exercise. These findings have implications for developing targeted interventions to enhance exercise tolerance and recovery in older adults.
Assessing Electronic Health Literacy in Individuals With the Post–COVID-19 Condition Using the German Revised eHealth Literacy Scale: Validation Study (Preprint)
Authors: Marsall Matthias , Dinse Hannah , Schröder Julia , Skoda Eva-Maria , Teufel Martin , Bäuerle Alexander
Published: April 2024

BACKGROUND

The eHealth Literacy Scale (eHEALS) is a widely used instrument for measuring eHealth literacy (eHL). However, little is known so far about whether the instrument is valid for the assessment of eHL in persons who are affected by the post–COVID-19 condition. This is particularly important as people with the post–COVID-19 condition are frequently affected by false information from the internet.

OBJECTIVE

The objective of our study was to evaluate the validity and reliability of the German Revised eHealth Literacy Scale (GR-eHEALS) in individuals with the post–COVID-19 condition.

METHODS

A cross-sectional study was conducted from January to May 2022. The self-assessment survey consisted of the GR-eHEALS, health status– and internet use–related variables, sociodemographic data, and (post)–COVID-19–related medical data. Confirmatory factor analysis (CFA), correlational analyses, and tests of measurement invariance were deployed.

RESULTS

In total, 330 participants were included in the statistical analyses. CFA revealed that the 2-factor model reached an excellent model fit (comparative fit index=1.00, Tucker–Lewis index=0.99, root mean square error of approximation=0.036, standardized root mean square residual=0.038). Convergent validity was confirmed by significant positive correlations between eHL and knowledge of internet-based health promotion programs, experience in using these programs, and the duration of private internet use. In addition, a significantly negative relationship of eHL with internet anxiety supported convergent validity. Further, significant relationships of eHL with mental health status and internal health locus of control confirmed the criterion validity of the instrument. However, relationships of eHL with physical health status and quality of life could not be confirmed. The 2-factor model was fully measurement invariant regarding gender. Regarding age and educational level, partial measurement invariance was confirmed. The subscales as well as the overall GR-eHEALS reached good-to-excellent reliability (Cronbach α≥.86).

CONCLUSIONS

The GR-eHEALS is a reliable and largely valid instrument for assessing eHL in individuals with the post–COVID-19 condition. Measurement invariance regarding gender was fully confirmed and allows the interpretation of group differences. Regarding age and educational level, group differences should be interpreted with caution. Given the high likelihood that individuals with the post–COVID-19 condition will be confronted with misinformation on the Internet, eHL is a core competency that is highly relevant in this context, in both research and clinical practice. Therefore, future research should also explore alternative instruments to capture eHL to overcome shortcomings in the validity of the GR-eHEALS.
Factors influencing the adoption of telemedicine services for middle-aged and elderly patients with chronic diseases in rural China: a multicenter cross-sectional study (Preprint)
Authors: Yao Li , Li Qiaoxing , Wang Tingshu , Peng Shuangfei , Fu Xinyun , Wang Wenfen , Yu Chen , Zhou Ling , Chen Mi
Published: April 2024

BACKGROUND

Background Telemedicine services have greatly enhanced healthcare quality and increased access for residents in remote areas through innovative solutions. Despite this progress, low user awareness and limited acceptance of these services still pose significant challenges. To address this issue, this study aims to develop a model that identifies factors influencing the adoption of telemedicine services among middle-aged and elderly rural patients with chronic illnesses, drawing from the Health Information Technology Adoption Model (HITAM).

OBJECTIVE

This study examines the critical factors impacting the willingness of patients with chronic diseases to embrace telemedicine services using a structural equation model.

METHODS

Methods A multicenter cross-sectional study was conducted at five hospitals in western China, focusing on rural middle-aged and elderly patients with chronic diseases. An empirical test was performed on the hypothesis model using structural equation modeling to determine the significance of path coefficients. This approach aimed to gain insights into the factors influencing patients' willingness to adopt telemedicine services.

RESULTS

A total of 880 middle-aged and elderly patients with chronic diseases in rural areas were examined in this study, with an average adoption intention score for telemedicine services of 3.94 (standard deviation 1.02).

CONCLUSIONS

The findings highlight that patients' education level, monthly income, and need for care significantly impact their inclination towards adopting telemedicine services. Structural equation modeling revealed that social influence (SI), self-efficacy (SE), perceived reliability (PR), and perceived health threat (PHT) were peripheral variables, while perceived ease of use (PEU), perceived usefulness (PU), and attitude acted as core mediating variables that positively influenced patients' adoption of telemedicine services and subsequent usage behavior. Moreover, social influence (SI), perceived reliability (PR), perceived usefulness (PU), and attitude directly and positively influenced patients' willingness to adopt telemedicine services.

CLINICALTRIAL

none
The Impact of Digital Technology on the Physical Health of Older Workers: Protocol for a Scoping Review (Preprint)
Authors: Spijker Jeroen J A , Barlın Hande , Grad Diana Alecsandra , Gu Yang , Klavina Aija , Korkmaz Yaylagul Nilufer , Kulla Gunilla , Orhun Eda , Ševčíková Anna , Unim Brigid , Tofan Cristina Maria
Published: April 2024

BACKGROUND

Digital technologies have penetrated most workplaces. However, it is unclear how such digital technologies affect the physical health of older workers.

OBJECTIVE

This scoping review aims to examine and summarize the evidence from scientific literature concerning the impact of digital technology on the physical health of older workers.

METHODS

This scoping review will be conducted following recommendations outlined by Levac et al and will adhere to the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews) guidelines for reporting. Peer-reviewed papers written in English will be searched in the following databases: MEDLINE, Cochrane, ProQuest, Web of Science, Scopus, APA PsycInfo, and ERIH PLUS. The web-based systematic review platform Covidence will be used to create a data extraction template. It will cover the following items: study and participant characteristics, health measures, digital tool characteristics and usage, and research findings. Following the Population, Concept, and Context (PCC) framework, our review will focus on studies involving older workers aged 50 years or older, any form of digital technology (including teleworking and the use of digital tools at work), and how digital technologies affect physical health (such as vision loss, musculoskeletal disorders, and migraines). Studies that focus only on mental health will be excluded. Study selection based on title and abstract screening (first stage), full-text review (second stage), and data extraction (third stage) will be performed by a group of researchers, whereby each paper will be reviewed by at least 2 people. Any conflict regarding the inclusion or exclusion of a study and the data extraction will be resolved by discussion between the researchers who evaluated the papers; a third researcher will be involved if consensus is not reached.

RESULTS

A preliminary search of MEDLINE, Epistemonikos, Cochrane, PROSPERO, and JBI Evidence Synthesis was conducted, and no current or ongoing systematic reviews or scoping reviews on the topic were identified. The results of the study are expected in April 2025.

CONCLUSIONS

Our scoping review will seek to provide an overview of the available evidence and identify research gaps regarding the effect of digital technology and the use of digital tools in the work environment on the physical health of older workers.

CLINICALTRIAL

INTERNATIONAL REGISTERED REPORT

PRR1-10.2196/59900
Research and Practice of Structural Mechanics Teaching Design in the Digital Age
Authors: Dong Tingting , Chen Hongxi , Yang Xiaoruo
Published: April 2024

This paper explores innovative strategies and practical applications for teaching structural mechanics courses in the digital era. The focus is on analyzing how online-offline hybrid teaching models can optimize the educational process in structural mechanics and enhance teaching efficiency and student learning outcomes. The paper elaborates in detail on how digital technologies support the teaching of structural mechanics, including the use of various digital tools and platforms to foster student interaction and participation, as well as improve their understanding and mastery of course content. Additionally, the research discusses the effective integration of ideological and political education within structural mechanics teaching, aimed at fostering students' comprehensive abilities. This study provides new perspectives and methods for the teaching design of structural mechanics and related disciplines in a digital learning environment.
El Espiritualismo Trinitario Mariano en Yucatán, su llegada y distribución en colonias marginales de la ciudad de Mérida
Authors: Rodríguez González Ricardo
Published: April 2024

Este artículo explora el proceso de llegada y permanencia del Espiritualismo Trinitario Mariano a la ciudad de Mérida, Yucatán, y cómo se desarrollaron las estrategias de expansión empleadas desde su arribo hasta el día de hoy. De igual manera, se explica cómo se convirtió en un referente de religiosidad popular importante para la población meridana, tanto mestiza como indígena. Paraello parto del supuesto de que el espiritualismo yucateco se nutrió teológica y pragmáticamente del espiritismo kardeciano, de los movimientos teosóficos de fínales del siglo xix y principios del xx, y de las creencias provenientes del pasado maya. Asimismo, se expone en qué consistió el proceso paulatino de popularización del movimiento espírita durante el siglo xx. Por último, se ofrece un panorama actual de la distribución de los templos espiritualistas, los cuales se ubican en algunas colonias populares y marginales de la capital yucateca.
Estrategias de vida familiar y formas de adquisición de alimentos en localidades mayas de Yucatán
Authors: Gutiérrez Carbajal María Guadalupe , Magaña Magaña Miguel Ángel , Zizumbo Villareal Daniel
Published: April 2024

El objetivo del estudio fue analizar las diversas formas de adquisición de alimentos de las familias mayas de Yucatán, bajo el enfoque de estrategias de vida, a partir del estudio de tres localidades de la entidad. Se logró identificar una serie de estrategias de vida familiar orientadas a satisfacer las principales necesidades alimenticias, para lo cual recurren a los capitales que integran su marco de subsistencia, determinado por hábitos y costumbres. Se identificaron diferencias en el uso de los capitales que dispone la familia, lo que conlleva diferentes vulnerabilidades de ésta frente a los factores externos, como las políticas de mercado y el efecto del cambio climático; esta condición se agrava por falta de liquidez financiera y de organización social en las comunidades, aspectos que condicionan las estrategias de vida que se reflejan en las formas de adquisición de los alimentos, ya sea recurriendo al agroecosistema tradicional o al mercado.
“Hacer partido” o “ser partido”. Breve recorrido histórico sobre un concepto político como idea de división social
Authors: Torres Martínez Rubén
Published: April 2024

Etimológicamente, las palabras partido (español y portugués), parti (francés, albanés, danés, noruego y turco), partito (italiano), partei (alemán), party (inglés), partit (catalán), partia (ruso), partii (polaco), part (húngaro), partid (rumano), derivan del verbo latín partire, que significaba “hacer partes”, es decir, dividir una totalidad en dos o más partes. Pareciese evidente que la noción de dividir traía consigo la noción de compartir. Esto, a su vez, nos lleva hacia la noción de conflicto. Desde la antigüedad y hasta el siglo xviii los colectivos políticos organizados se reagrupaban en facciones y no en partidos. Es en el siglo xx cuando asistimos a la aceptación cuasi universal de partido político. Buscamos demostrar desde un enfoque socio-histórico cómo el concepto “partido político” se instauró en la cultura liberal democrática de Occidente, sin perder su conceptualización original de dividir y compartir, es decir, de hacer partes.
“Mi lugar es con maría, no con Jesús”. Relaciones espaciales y construcción de género durante la semana santa en Guatemala
Authors: Ponciano Castellanos Karen
Published: April 2024

Las reflexiones que intento plantear en este artículo están relacionadas con mi trabajo de investigación sobre la construcción de subjetividades de género en espacios religiosos urbanos de la ciudad de Guatemala. El análisis que presento se basa en el trabajo de campo realizado en 2017, durante las festividades de Semana Santacon entrevistas de seguimiento en los meses posteriores. A partir de una reflexión etnográfica, expongo cómo el género produce y es producido en el contexto de la Semana Santa, entendida como espacio de subjetivación en el cual conviven múltiples actores. Por otra parte, la aproximación a las diversas experiencias cotidianas y a las trayectorias individuales y colectivas permite explorar cómo tales actores viven, se representan, producen y transgreden las fronteras normativas de género.
Turismo y dependencia en México: el trabajo en las ciudades turísticas de Quintana Roo
Authors: Escamilla Cárdenas Renata
Published: April 2024

Aunque el turismo es actualmente una de las actividades de mayor crecimiento a nivel mundial, su distribución regional no se ha dado de manera homogénea, acelerándose en economías dependientes, en donde reproduce una condición subordinada, pues se encuentra en función del mercado exterior. También se debe tener en cuenta que esta actividad la dirige el capital extranjero y la hacen posible un conjunto de labores estacionales, eventuales e intensivas desarrolladas por mano de obra no calificada. Además, como la producción y el consumo ocurren en un mismo territorio, la fiesta se convierte en uno de los espacios predilectos del turismo en México. Estasituación repercute en las condiciones de vida de la gente que acude a la península de Yucatán en busca de empleo.
El santuario de Chuiná: recorrido por el sentido de un espacio religioso maya
Authors: Orihuela Gallardo María del Carmen
Published: April 2024

El espacio de devoción indígena-católica de Chuiná es uno de los santuarios más visitados en la península de Yucatán pues, así como acuden peregrinaciones de comunidades mayas, también lo hacen de diferentes estados México. Si bien la imagen de tradición aparicionista es el motivo principal de la movilidad de los devotos, las características del espacio que se concentran en el lugar —un cerro, una cueva y una laguna— han tenido un papel fundamental en su construcción simbólica. Asimismo, el proceso histórico-social que involucra la zona de “las montañas” con las comunidades mayas del norte de la península de Yucatán hace que este espacio tenga significaciones que rebasan lo puramente religioso para comprenderse como una apropiación del territorio extracomunitario. A partir de la narrativa maya se ofrece un contexto cultural, que legitima a Chuiná como un espacio de identidad maya, por conjuntar elementos de territorialidad, económicos, cosmogónicos y emocionales.
Violencia de género contra mujeres y niñas y feminicidio en Yucatán: apuntes para su investigación
Authors: Fragoso Lugo Perla
Published: April 2024

Este artículo se basa en la propuesta de Marcela Lagarde de abordar el feminicidio como un fenómeno estrechamente vinculado al territorio geopolítico donde se presenta, como un conjunto de asesinatos que es necesario revisar no de manera aislada, así como que los feminicidios están precedidos por un continuum de violencias. En el presente artículo se evidencian algunos elementos para caracterizar socialmente el espacio de despliegue de la violencia de género contra las mujeres y niñas, y su expresión más radical, el feminicidio, en Yucatán. Este planteamiento problematiza y cuestiona el argumento generalizado que, mecánicamente, correlaciona estos sucesos únicamente con contextos de elevada inseguridad o criminalidad.
La percepción de la inseguridad pública en Cunduacán, Tabasco
Authors: Yanes Pérez Maritel , Canto Valdés Luis Roberto , López López Mariela
Published: April 2024

Estainvestigación tiene como objetivo analizar la percepción de inseguridad pública en el municipio de Cunduacán, Tabasco, por medio de la descripción de algunos de los factores que intervienen en este fenómeno. Paralograrlo, se empleó una metodología cualitativa mediante la observación participante y la aplicación de entrevistas con un guion semiestructurado, tanto a hombres como a mujeres mayores de edad quienes radican en el municipio. Los factores que influyeron en el incremento de la violencia en Cunduacán son principalmente el desempleo, los bajos salarios y, en menor medida, la falta de educación, la pérdida de valores y el aumento del narcotráfico.
Profecía, discurso e interpretación. Los itzaes, Avendaño y el 8 Ahaw Katún
Authors: León O’Farrill Israel
Published: April 2024

Laconquista del Petén Itzá en Guatemala tuvo lugar el 13 de marzo de 1697, bajo las órdenes de Martín de Urzúa, gobernador de Yucatán. Previo a la misma, hubo varios intentos infructuosos para evangelizar la región encabezadas por frailes franciscanos. Fray Andrés de Avendaño y Loyola realizó dos entradas a la zona del Petén en 1695, con la esperanza de lograr la conquista pacífica de la región. Como estrategia de negociación, en su diálogo con los itzaes, Avendaño hizo referencia a la profecía del 8 ahau katún, el katún de la guerra, la conquista y el cambio, y lo que sucedería entre 1697 y 1717, pero fracasó.En este texto pretendo analizar el fenómeno de la profecía en lo general y la del 8 ahau katún en lo particular, además de las diferencias y semejanzas entre los pensamientos europeo y maya, así como la forma en que esto fracasó para evitar la guerra.
Química Verde. Principio por principio
Authors: Miranda Ruvalcaba René , Cid del Prado Mejía Karina , Noguez Córdova María Olivia , Escobedo González René Gerardo , Martínez Joel Omar , Cortés Ruiz Velasco José Francisco , Reyes Sánchez Laura Bertha
Published: April 2024

En esta obra se destaca la inminente relevancia de la Química Verde y su enseñanza-aprendizaje mediante el conocimiento de cada uno de sus 12 Principios. De ahí su título, Química Verde. Principio por Principio. Con este volumen se deja claro que el paradigma de la química es una vía para incidir en el Desarrollo Sostenible. Con este libro se atiende al llamado de la UNESCO conocido como “Década para Educar en la Sostenibilidad: 2005-2014” y de la Agenda 30 de la Organización de las Naciones Unidas que se articula mediante los 17 Objetivos del Desarrollo Sostenible.
Implementation of Manufacturing Execution System (MES) to Increase Productivity and Competitiveness in the Manufacturing Sector
Authors: Wagh Sagar D
Published: April 2024

Abstract: Industry 4.0's underlying digital technologies are already essential in helping manufacturing businesses, especially small and medium-sized enterprises (SMEs), to adapt to the dynamics of the new normal. Manufacturing execution system (MES) serves as the factory information hub and is made possible by internet of things (IoT) ready devices that generate data and cyber physical systems that control the interconnection between equipment and computational assets for industries to achieve sustained competitiveness and address post- pandemic market volatility by utilizing real-time information. This paper focuses on the implementation for MES with the help of three case studies. Three case studies were used to empirically test the theories put out on MES to provide an overview of "How MES is efficient in loss reduction” through findings from cross-case synthesis of the data that was gathered.
Wireless Charging of Electric Vehicle on Highways in Running Mode by Solar Energy
Authors: Choudhary Vinam
Published: April 2024

Abstract: The adoption of electric vehicles (EVs) is on the rise globally, driven by the need for sustainable transportation solutions to mitigate climate change and reduce dependence on fossil fuels. However, the infrastructure for charging EVs remains a significant challenge, hindering widespread adoption. In response, innovative approaches such as wireless charging technology, coupled with solar energy, have emerged to address these challenges. This paper presents an overview of wireless charging systems for electric vehicles, integrated with solar energy, aiming to provide a sustainable and convenient solution for EV owners. The integration of wireless charging and solar energy offers numerous benefits, including convenience, efficiency, and environmental sustainability. By eliminating the need for physical connections and harnessing the power of the sun, electric vehicles can be charged seamlessly and sustainably, reducing reliance on the grid and lowering carbon emissions. This paper discusses the principles behind wireless charging technology, the design considerations for integrating solar energy, and the potential impact on the future of sustainable transportation. Additionally, it addresses the challenges and opportunities associated with this innovative approach, highlighting the need for further research and development to realize its full potential. Overall, the convergence of wireless charging technology with solar energy represents a promising solution to the challenges facing the widespread adoption of electric vehicles, contributing to a cleaner and greener transportation ecosystem.
Desafíos de la interacción social de la persona con autismo en el mercado laboral
Authors: Barbi Karina Borgonovi Silva , Rocha Serralvo Esther , Massucato Pavão Gabriel , Pereira Bitencort Lucas , Messias João Carlos Caselli , Labarthe Javier
Published: April 2024

Los individuos diagnosticados con Trastorno del Espectro Autista (TEA) tienen dificultades conductuales y de interacción social como características típicas de su síndrome. Quienes necesitan ayuda y logran ingresar al mercado laboral, experimentan varios obstáculos como desventaja en los procesos de selección, sufrimiento de estigma y prejuicio, insuficiencia de las estructuras ambientales y de comunicación. Esta revisión de alcance buscó explorar los aspectos sociales presentes en la realidad de las personas con TEA en el mercado de trabajo, en un intento de identificar las dificultades inherentes a los diversos niveles, así como las medidas de apoyo tomadas. Se localizaron y analizaron 36 artículos de las bases de datos Scopus, Web of Science, PsycINFO, SciELO y PePSIC, ninguno de estos escritos en América Latina. Los resultados apuntan a la falta de conocimiento en un nivel satisfactorio sobre los TEA por parte de las organizaciones, directivos y colaboradores, con el fin de prevenir la discriminación, adecuar las condiciones de trabajo y promover la realización profesional de esta población con justicia y dignidad.
STUDY OF PHYSICAL AND MECHANICAL PROPERTIES POLYURETHANE COMPOUNDS FOR EVALUATION THE POSSIBILITY OF THEIR USE IN A DIAPHRAGM PISTON PUMP
Authors:   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation, DOROKHOV A.S. , SVIRIDOV A.S. ,   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation, TUZHILIN S.P. ,   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation
Published: April 2024

The diaphragms in diaphragm piston pumps serve as the main working parts, the failure of which entails the shutdown of the entire pump, and, as a result, the sprayer, which leads to a decrease in the efficiency of agricultural activities and an increase in the cost of restoring the operability of agricultural equipment. The relevance of using the technology of free casting of twocomponent polyurethane in silicone molds in the organization of repair sites is due to the high quality of the parts obtained with a significant reduction in cost, as well as production time. Since the main reason for the failure of the membrane is abrasive wear and cyclic loads, the determining properties are hardness, strength and ductility of the materials used. (Research purpose) The research purpose is assessing the hardness, strength and plasticity of polyurethane compounds of various brands, depending on the production conditions of the sample, and concluding their applicability to manufacture piston pump diaphragms by free casting. (Materials and methods) Presented studies of hardness, tensile strength and elongation at break of three grades of polyurethane compounds PolyFlex 80A, Advaform Mark 80 and Silagerm 6080, depending on the technological modes of manufacturing samples from them. (Results and discussion) It was found that the curing of polyurethane compounds at higher temperatures allows for high strength and plastic properties of the material. It was noted that during curing, molecules are redistributed into the most favorable energy configurations, which exclude the appearance of structural stress concentrators, increasing the plasticity and strength of the material. The increased temperature helps to remove residual stresses in the material that occur during shrinkage. (Conclusions) The application scope of the research results is the manufacture of polymer parts of agricultural machinery, in particular, diaphragm diaphragm piston pump.
INFLUENCE OF TECHNOLOGICAL MODES OF PLASMA COATING ON THE THICKNESS OF THE LAYER FORMED
Authors:   Mechanical Engineering Research Institute of the Russian Academy of Sciences, Moscow, Russian Federation, KRAVCHENKO I.N. ,   Russian State Agrarian University - Moscow Timiryazev Agricultural Academy, KUZNETSOV YU.A. ,   Orel State Agrarian University named after N.V. Parakhin, Orel, Russian Federation, BARANOVA N.S. ,   MIREA - Russian Technological University, Moscow, Russian Federation, BOROVIK T.N. ,   MIREA - Russian Technological University, Moscow, Russian Federation
Published: April 2024

Parts of technological machines, complexes and equipment used in many industries are subject to various types of mechanical wear, which leads to a significant decrease in their durability and an increase in maintenance and operating costs. Promising directions for improving the technologies of plasma application of wear-resistant coatings have been identified. Special attention was paid to the thickness of the functional layer, since when using plasma spraying methods, it has a significant impact on the quality of coatings. (Research purpose) The research purpose is developing mathematical models that make it possible to study the influence of the technological parameters of the plasma application of wear-resistant coatings on the thickness of the functional layer being formed. (Materials and methods) Samples made of 45 steel were used for experimental studies, on which a nickel-based powder PG-CP4 (PR-NH17CP4) was sprayed by plasma method. The current strength of the plasma torch arc, the spraying distance and the consumption of plasma-forming gas were adopted as the main technological modes of plasma spraying of coatings. The thickness of the formed coatings was measured on standardized equipment. Statistical processing of the obtained coating thickness values was carried out using a complete factor experiment using the Box-Wilson method. (Results and discussion). We have developed an experimental mathematical model of the technological process of plasma coating and demonstrated its operability. The criteria used to evaluate the variance of experiments, the adequacy and significance of the obtained regression equations are described. Using the Statistica program, a graphical interpretation of the studied dependencies was given. (Conclusions) Based on the mathematical planning of the experiment, models were obtained that make it possible to establish the relationship between the coating thickness and the specified technological parameters of the plasma spraying process. The results of the analysis of the presented analytical dependencies showed that the thickness of the coating is most influenced by the current strength of the plasma torch arc.
TILLAGE CUTTERS FOR BASIC TILLAGE AND RESTORATION OF BLACKENED LANDS
Authors:   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation, MIRONOVA A.V.
Published: April 2024

Milling is one of the most effective methods of processing of heavy over-compacted soils, recultivation of blackened lands and development of virgin and fallow lands. As a result of intensive loosening and mixing of the soil, the mineralization process accelerates. When choosing the type of milling unit and its operating modes, the depth of the humus horizon, the type and density of the soil, the thickness of the sod, the presence of shrubs, stones, stumps, hummocks, the microrelief of the soil, the contamination with rhizomatous and other weeds are taken into account. (Research purpose) The research purpose is analyzing the used tillage cutters for basic tillage and the returning of blackened lands into circulation. (Materials and methods) Considered the design features of tillage cutters used in basic tillage and in blackened areas. Systematized data about them. (Results and discussion) It was determined that various designs of cutters make it possible to effectively grind blackened and compacted soil, destroy above-ground vegetation, and level the surface soil layer. It was found that effective processing of blackened lands includes grinding the sod and embedding it in the soil to a depth of 20-25 centimeters, creating a loose homogeneous fertile soil layer. (Conclusions) Milling allows high-quality processing of heavy, including blackened soils. The technological operation of milling provides shredding of weeds, uniform processing of fields and leveling of the surface layer, increasing the air permeability and infiltration properties of soils, reducing the time to prepare for pre-sowing treatment by combining several technological operations when using combined cutters.
OPERATION ALGORITHM FOR THE AUTONOMOUS ROBOTIC WEED MONITORING SYSTEM
Authors:   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation, SMIRNOV I.G. , DYSHEKOV A.I. ,   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation, DEVYATKIN F.V. ,   Moscow State Technical University named after N.E. Bauman, Moscow, Russian Federation
Published: April 2024

An autonomous robotic complex designed for monitoring weed vegetation requires an efficient algorithm for proper movement in the work area. (Research purpose) The research purpose is creating and testing an algorithm using a virtual robot model in Gazebo simulator and field tests using a prototype. (Materials and methods) It was noted that the developed algorithm includes a method of classification and decision-making. Indicated that at the first stage the robot is being prepared, including checking the systems and sensors. Then parallel programs are launched, including receiving and processing the video stream from the camera, detecting weeds and correcting the path traveled. (Results and discussion) It was determined that the camera continuously sends images of plants under the robot for processing. The second program detects weeds, and according to the data obtained, the robot’s path is corrected and the working part is positioned. It was established that in case of detection of weed vegetation, its coordinates are determined, which is necessary for localization in the work area and correction of the path. Then the path of the robot’s movement between the rows of plants is determined, and the error of deviation from the set course is transferred to the next step of the algorithm. (Conclusions) As a result of the experiments conducted in simulation and field tests, the algorithm showed the effectiveness and correct operation of the robot in real time. The created algorithm does not require significant computational resources, and its successful testing in various conditions has confirmed its applicability for monitoring weeds.
SIMULATION OF CONCENTRATED SOLAR RADIATION BY INFRARED RADIATION FOR MEASURING THE THERMAL CHARACTERISTICS OF THE THERMAL PHOTOVOLTAIC MODULE OF A SOLAR CONCENTRATOR INSTALLATION
Authors:   Federal Scientific Agroengineering Center VIM, Moscow, Russian Federation, SAGINOV L.D.
Published: April 2024

When developing renewable energy conversion devices, more and more attention is being paid to improving the efficiency of using renewable energy. The efficiency of modern mass-produced solar photovoltaic modules is about 20 percent. In order to increase the completeness of the use of solar energy, the direction of thermal photovoltaic systems is receiving significant development. Devices of this type realize the task of recycling the remaining 80 percent of energy into heat for its subsequent use. The conversion of concentrated solar energy into photoelectricity and heat is carried out by a thermal photovoltaic module. The study of its photovoltaic and thermal parameters is one of the main tasks when creating an appropriate installation. (Research Purpose) The research purpose is developing a methodology and creating a laboratory installation for studying the thermal characteristics of a thermal photovoltaic module. (Materials and methods) The design of the thermal photovoltaic module is presented. The spectral characteristics of the photodetector surface of the module in the visible and infrared spectral ranges have been studied by dispersion and Fourier spectroscopy. (Results and discussion) The analysis of the results of the study of the reflection spectra in the visible and infrared spectral ranges along with the spectral density of the infrared Planck radiation for the temperatures of the infrared emitter in the region of 250-300 degrees Celsius is carried out. The conversion coefficients of the intensities of concentrated solar radiation into the density of the Stefan-Boltzmann infrared radiation flux are obtained. A test measurement of the stationary temperature of the coolant at the output of the module was carried out, according to which the flux density of the heating infrared radiation was calculated. This value is correctly consistent with the independently measured intensity of infrared radiation. (Conclusions) A laboratory measuring stand has been created to simulate concentrated solar radiation with infrared radiation of the thermal range to measure the thermal characteristics of the thermal photovoltaic module of a solar concentrator installation.
UZBEK CATTLE BREEDING AND PERSPECTIVE OF HIS DEVELOPMENT BY RATIONS OF FEEDING OPTIMIZATIONS WITH ELECTRONIC TABLES HELPING
Authors:   Андижанский институт сельского хозяйства и агротехнологий, YULDASHEV D.K.
Published: April 2024

The Republic of Uzbekistan livestock and poultry farming state’s general overview in recent years and the main problems of its development is given. The full fledged detailed feeding role and its importance through the modern technologies for rations’ preparation, taking into account the of nutrients, breeding work with farm animals and poultry actual content through the simple and affordable rations by computer technology and digital technologies using creation are shown. To organize farm animals and poultry’s full fledged detailed feeding on private and small farms, a simple program is offered using of which is available for any farmer. At rations compiling within the Microsoft Excel program framework on one sheet by data on nutrition and the amount of feed entering, you can create a rations for any type of farm animals and poultry, taking into account their production and physiological state. At additional data input, the program will also allow to analyze this rations according to such indicators as energy, protein, fat, carbohydrate and mineral content, and as well as their ratio. The compilation of scientifically based rations by simple and accessible computer programs will allow to obtain maximum amount of livestock and poultry products in the Republic of Uzbekistan at their quality improving. By this program using the farmer enters normative or factual data on his nutritional value for farm feed, species’ feeding standards, production and physiological condition of farm animals and poultry. If desired, in this program, it can be analyzed the rations compiling, its disadvantages and advantages identifying, and it can also enter data on feed prices into the program in order to the compiled rations’ cost estimating. This simple ration preparation will allow to improve small farm livestock and poultry feeding, that will have a positive impact on genetic potential manifestation and farm animals and poultry production to increase.
APPLICATION OF THE COLOR SEGMENTATION METHOD AT THE FEED MIXTURE UNIFORMITY DETERMINATION TASK
Authors:   Федеральный научный агроинженерный центр ВИМ, IVANOV YU.A. , BULATOV S.Y. ,   Нижегородский государственный инженерно-экономический университет, TAREEVA O.A. ,   Нижегородский государственный инженерно-экономический университет, MALYSHEV G.S. ,   АО «ОКБМ Африкантов»
Published: April 2024

The prepared compound feed’s quality by the resulting mixture uniformity is assessed. The known methods for this indicator determining by the control component or mixture components’ electrophysical properties involve sampling analysis, that is resource expensive and ineffective. The machine vision using for mixing quality in real time determining is more efficient way. However, the feed mixture is blurred bulk media by its characteristics, that makes it difficult photo and video recording to mixture’s composition study carrying out. This study peculiarity is that the mixture’s mixing quality by machine vision methods using to analyze of images obtained blurred bulk media using by an endoscope with an annular illuminator is determined. The endoscope is mounted in a cylindrical protective box with a transparent end glass (the optical axis of the endoscope and the cylinder’s axis are coincided). To analyze each image, a binary mask highlighting only the image’s informative part is constructed it means that image’s part from which the highlights from the annular illuminator and the protective box’s glass outside area are excluded. Next, these colors’ average values of the template image corresponding to the recognized mixture components are calculated, then the number of pixels closest to Euclidean metric to selected color clusters corresponding to the number of mixture’s components is determined. The color’s numerical characteristic by the RGB channels or Lab color representations is set. The paper shows that in the case of a multicomponent mixture working the Lab space gives better results in compared to the RGB space. The estimation of the color segmentation method’s error determining the number of pixels corresponding to a particular color’s cluster is given. It is shown that the morphological operation of image’s connected areas removing reduces the number of "false" pixels in the color cluster. In the future, the obtained results in the feed components uniformity distribution’s program determining will be included.
THE THEORETICAL ASPECTS OF BIOGAS PRODUCTION DURING ORGANIC WASTE'S FERMENTATION ANAEROBIC PROCESS
Authors:   Казанский государственный аграрный университет, GAYFULLIN I.H. , ZIGANSHIN B.G. ,   Казанский государственный аграрный университет, SHORNIKOV A.V. ,   Казанский государственный аграрный университет, IVANOV B.L. ,   Казанский государственный аграрный университет, ZINNATULLINA A.N. ,   Казанский государственный аграрный университет
Published: April 2024

The biogas extraction process's theoretical description during carbon containing agricultural waste's anaerobic digestion is considered. This proposed installation's work for biogas and organic fertilizers production during waste's anaerobic digestion is described. These anaerobic methods' advantage as biological treatment's unlike classical aerobic methods, when all bacteria work under the same conditions, with properly organized anaerobic processes is made, the separated bacteria in different physico-chemical conditions working. This makes it possible the anaerobic digestion process in productivity terms optimizing, managing and, ultimately, the waste processing quality improving. Based on the proposed biogas installation, the equations for the biogas yield determining are obtained. The of pig manure biogas output's theoretical results with crushed corn grain's addition are presented. This biogas installation's calculation method on the biogas output in dependence on empirical and technical parameters' design is based. The aim is biogas and biofertilizer's production during pig manure fermentation intensity increasing. The proposed biogas installation in psychophilic (3-25°C), mesophilic (25-40°C) and thermophilic (40-55°C) temperature conditions can operating. The substrate is heated by biogas through a vortex tube passing. The organic substances' anaerobic processing leads the biodegradable substances' main part into CO2, H2O and NH3 decompositing. Bacteria such as Bacillus, Micrococcus, Pseudomonas and Clostridium play a key role in this process by enzymatic hydrolysis and acid's formation carrying out. The theoretical calculations show that the highest biogas producing with a content of solid particles in the fertilizer of no more than 8,8-10% and substrate's effective mixing is achieved. The organic waste processing into biogas is justify and preferable. This product (biogas) everywhere can be used, both on individual agricultural firms and in general in agriculture, where it will be the most effective using.
TRANSLATION AND VALIDATION OF A BAHASA MALAYSIA (MALAY) VERSION OF THE ACTIVITIES OF DAILY LIVING QUESTIONNAIRE (ADLQ)
Authors: Nasieha Nisa Nurul Iryanie , Yusof Khairunnisa , Hafizan Nur Atifah Nabilah , Dahlan Akehsan , Sultan Ibrahim Syamsul Anwar
Published: April 2024

The ability to perform activities of daily living (ADL) and instrumental activities of daily living (IADL) can indicate the functional status of elderly individuals with dementia. The Activities of Daily Living Questionnaire (ADLQ) is a widely used informant-based assessment tool for measuring functional abilities in individuals with dementia. However, the original ADLQ is in English and not applicable to the Bahasa Malaysia language. This study aimed to translate and validate the ADLQ into Bahasa Malaysia to address this gap of knowledge. The study conducted a cross-sectional study among primary caregivers of elderly individuals with dementia. Forward and backward translations were used to translate the ADLQ into Bahasa Malaysia. The validity of the translated ADLQ was evaluated through face and content validity, concurrent and convergent validity, and test-retest reliability. The Bahasa Malaysia version of the ADLQ achieved excellent agreement in both face and content validity, with an average Face Validity Index (FVI) score of 0.95 and an average Content Validity Index (CVI) score of 0.94. The Modified Kappa (k*) agreement for the translated ADLQ was 0.93, indicating substantial agreement between the translators. Concurrent validity was established through a strong correlation between the original English version and the translated ADLQ for the total score (r = 0.93, p < 0.05), total percentage (r = 0.94, p < 0.05), and total points (r = 0.84, p < 0.05). Convergent validity was established through a strong correlation between the ADLQ-BM and the Bristol Activities of Daily Living Scale (BADLS) (r = 0.85, p < 0.05). Finally, the test-retest reliability achieved very strong correlations for the total score (r = 0.94, p < 0.05) and total percentage (r = 0.95, p < 0.05), and a strong correlation for the total points (r = 0.88, p < 0.05). In conclusion, the Bahasa Malaysia version of the ADLQ is a valid and reliable assessment tool for measuring functional abilities among elderly individuals with dementia. The excellent agreement in the face and content validity and the strong correlation in concurrent and convergent validity indicate that the translated ADLQ is a robust tool for assessing functional abilities in elderly individuals with dementia in Malaysia. The findings of this study can provide valuable information for clinicians and researchers in Malaysia who wish to evaluate the functional abilities of elderly individuals with dementia.