bluuebunny/crossref_metadata_2025 huggingface dataset:
On THz cyclotron resonance continuous wave lasers in graphene in crossed E,H fields at T=300 K
Authors: Andronov A. A.  , Pozdniakova V. I.
Published: June 2023

In framework of classical consideration of electron trajectories in crossed E,H fields and conductivity of electron system on cyclotron resonance in single layer graphene possibility to achieve THz cyclotron lasing in hexagonal boron nitride--single layer graphene sandwiches is discussed. By simplified consideration with known data on scattering rate in the sandwiches it is demonstrated that the CW laser action can be achieved in high quality sandwiches at room temperature at frequencies above about 0.5-1 THz in magnetic field above 5000-10000 Gauss. Short discussions of Landau level quantization in crossed fields, amplification on cyclotron harmonics and cyclotron amplification at low temperatures are given. Keywords: graphene, cyclotron resonance, THz amplification, Landau level population inversion.
Front contact to the GaSb-photovoltaic converter: Properties and thermal stability
Authors: Sorokina S.V.  , . Soldatenkov F. Yu.  , Potapovich N. S.  , Khvostikov V.P.
Published: June 2023

Issues related to the thermal stability of front contacts, based on Cr-Au and Cr-Au-Ag-Au, to GaSb-based photovoltaic cells have been considered at the operational (the cell temperature is 50oC) and standard conditions as well as at the forced thermal degradation (at 125 and 200oC). It is shown that the photovoltaic converter with the silver-containing contact is preferable in terms of the stability of contact resistivity, external quantum yield, FF, Voc, and therefore, the cell efficiency and service life. The durability of the cells is determined at operational and elevated temperatures. Keywords: contact, degradation, photovoltaic converter, GaSb.
On heating mechanisms in LEDs based on p-InAsSbP/n-InAs(Sb)
Authors: Zakgeim A. L.  , Karandashev S. A.  , Klimov A. A.  , Kunkov R. E.  , Lukhmyrina T. S.  , Matveev B. A.  , Remennyi M. A.  , Usikova A. A.  , Chernyakov A. E.
Published: June 2023

Three main reasons for a temperature increase in activated p-InAsSbP/n-InAs/n-InAsSbP and p-InAsSbP/ n-InAsSb/n-InAs double heterostructures has been considered, contribution of nonradiative Auger recombination, electron-phonon interaction and Joule heating to diode temperature increase in single element LEDs and flip-chip diode arrays (1x3) were evaluated at forward and reverse bias using data on spatial distribution of the mid-IR radiation intensity and current-voltage characteristics. Keywords: IR LED, IR diode array, Joule heating, Auger recombination, electron-phonon interaction.
Story Mosaic: Visualizing Life Story for Better Personalized Eldercare (Preprint)
Authors: Gui Fang , Yang Jiaoyun , Wu Qilin , Liu Yang , Zhou Jia , An Ning
Published: June 2023

BACKGROUND

Various eldercare settings have embraced the utilization of the life story approach to enhance the development of comprehensive care plans. However, organizing life stories and extracting useful information continues to be labor-intensive, primarily due to the repetitive, fragmented, and redundant nature of life stories gathered from everyday communication scenarios. Existing life story systems, while available, do not adequately fulfill the requirements of users, especially in the application of care services.

OBJECTIVE

The objective of this study is to design, develop, and evaluate a digital platform that provides caregivers with the necessary tools to effectively manage and visually view life stories, enabling expedited access to pertinent information.

METHODS

This study followed a multi-discipline integration and user-centered design approach, consisting of four phases: pre-research, prototyping, workshops for prototypes, and usability testing. During the initial phase, field research was conducted in four nursing homes to discover how caregivers currently store and use life stories, as well as their needs, challenges, and obstacles in organizing and retrieving information. Subsequently, according to the users’ requirements, we designed a low-fidelity prototype. A prototyping workshop involving six staff members from a nursing home was held to collaboratively design and discuss the prototype's function and interaction. User feedback from the workshops was used to optimize the prototype, leading to the development of the system. Two rounds of usability testing were conducted with seven caregivers to evaluate the system's usability and effectiveness. The feedback was instrumental in refining and improving the system. Finally, the Story Mosaic system was implemented in a nursing home, and its usage analysis demonstrated its availability and user-friendly nature, effectively addressing caregivers' challenges in organizing and accessing life stories.

RESULTS

During the workshop, it was determined that the system consists of three main functional modules: 1) the hierarchical display of life stories, 2) the extraction and highlighting of relevant information, and 3) the generation of memoirs. Subsequently, through the analysis from workshops and usability tests, three key themes for functional optimization were identified: user-friendly design of the interface, enhancements to existing functionality, and the incorporation of additional features. Taking these findings into account, the design, development, and evaluation of the Story Mosaic system were carried out to ensure its usefulness and ease of use.

CONCLUSIONS

The Story Mosaic system underwent testing and validation in a nursing home, involving a total of 16 older adults and a collection of 1123 life stories. Our future research will focus on evaluating the clinical application outcomes of the system.
Patient-Specific Pharmacokinetics and Dasatinib Nephrotoxicity
Authors: Adegbite Benjamin O. , Abramson Matthew H. , Gutgarts Victoria , Musteata Florin M. , Chauhan Kinsuk , Muwonge Alecia N. , Meliambro Kristin A. , Salvatore Steven P. , El Ghaity-Beckley Sebastian , Kremyanskaya Marina , Marcellino Bridget , Mascarenhas John O. , Campbell Kirk N. , Chan Lili , Coca Steven G. , Berman Ellin M. , Jaimes Edgar A. , Azeloglu Evren U.
Published: June 2023

Background

Dasatinib has been associated with nephrotoxicity. We sought to examine the incidence of proteinuria on dasatinib and determine potential risk factors that may increase dasatinib-associated glomerular injury.

Methods

We examined glomerular injury through urine albumin-creatinine ratio (UACR) in 82 patients with chronic myelogenous leukemia who were on tyrosine-kinase inhibitor therapy for at least 90 days. t tests were used to compare mean differences in UACR, while regression analysis was used to assess the effects of drug parameters on proteinuria development while on dasatinib. We assayed plasma dasatinib pharmacokinetics using tandem mass spectroscopy and further described a case study of a patient who experienced nephrotic-range proteinuria while on dasatinib.

Results

Participants treated with dasatinib (n=32) had significantly higher UACR levels (median 28.0 mg/g; interquartile range, 11.5–119.5) than participants treated with other tyrosine-kinase inhibitors (n=50; median 15.0 mg/g; interquartile range, 8.0–35.0; P < 0.001). In total, 10% of dasatinib users exhibited severely increased albuminuria (UACR >300 mg/g) versus zero in other tyrosine-kinase inhibitors. Average steady-state concentrations of dasatinib were positively correlated with UACR (ρ=0.54, P = 0.03) and duration of treatment (P = 0.003). There were no associations with elevated BP or other confounding factors. In the case study, kidney biopsy revealed global glomerular damage with diffuse foot process effacement that recovered on termination of dasatinib treatment.

Conclusions

Exposure to dasatinib was associated with a significant chance of developing proteinuria compared with other similar tyrosine-kinase inhibitors. Dasatinib plasma concentration significantly correlated with higher risk of developing proteinuria while receiving dasatinib.
Presencias centroamericanas en la Costa de Chiapas. Tres viñetas etnográficas sobre pesca y migración
Authors: Castillo Figueroa Giovanny
Published: June 2023

Este texto tiene por objeto describir y analizar la participación de población centroamericana en el ámbito de la pesca a pequeña escala en la costa de Chiapas. En cuanto a metodología, se adopta un enfoque etnográfico que acentúa las voces de actores locales y se nutre de información empírica obtenida mediante observaciones y entrevistas in situ. En primer lugar, se brinda un panorama de la relación entre migración y pesca en el área de estudio y posteriormente se desarrollan tres escenas que muestran diferentes trayectorias de movilidad y experiencias de trabajo en el sector pesquero: 1) habitantes de localidades costeras guatemaltecas que pescan por períodos cortos en aguas mexicanas y después retornan a sus lugares de origen; 2) migrantes en tránsito que se emplean por tiempo indefinido en la descarga, almacenaje y venta de pescado, mientras reúnen recursos suficientes para seguir su viaje, y 3) migrantes que han decidido radicar definitivamente en localidades costeras mexicanas y se insertan en varias tareas del proceso pesquero, desde la confección y reparación de redes de pesca hasta la captura y procesamiento del producto. Para finalizar, el artículo enfatiza la heterogeneidad de los procesos migratorios-laborales y la relevancia que en ellos adquieren las presencias centroamericanas.
DIVERSITY AND ABUNDANCE OF AMPHIBIANS IN THE LONDON 50 HA ENVIRONMENTAL COMPENSATION PROJECT, PANAMA
Authors: Fuentes Magallón Rogemif Daniel , Barría Erick
Published: June 2023

Panama has 230 species of amphibians, of which 72 (31.4%) are threatened according to national legislation and 19 are endemic. The study area has gallery forests where the samplings were carried out, we registered 15 amphibian species that represent 6.5% of those registered in the country.
OBSERVACIONES DE DEPREDACIÓN DE Incilius marmoreus (ANURA: BUFONIDAE)
Authors: Rueda Hernández Daniel
Published: June 2023

Incilius marmoreus es una especie de sapo endémico de México del cual la información sobre sus depredadores naturales es limitada, en este escrito presento tres casos de depredación durante recorridos nocturnos en la región Costa de Oaxaca, los hechos se observaron mientras los individuos forrajeaban entre los senderos del Parque Nacional Huatulco y el sendero candelabro en temporada de lluvias tenues.
ESFUERZO REPRODUCTOR Y ASPECTOS DEL CUIDADO PARENTAL DE LA LAGARTIJA CAIMÁN Gerrhonotus infernalis (SQUAMATA: ANGUIDAE)
Authors: Vargas Ramírez Héctor Alejandro , Arenas-Moreno Diego , Lazcano-Villarreal David
Published: June 2023

La masa relativa de nidada (MRN) es ampliamente utilizada como una medida del esfuerzo en la reproducción de las hembras en las lagartijas, siendo que las especies que no presenten cuidado parental las que tienden a tener una MRN mayor. En este trabajo, estimamos el esfuerzo reproductor de una lagartija ovípara que supuestamente presenta cuidado parental, para esto colectamos cuatro hembras grávidas de G. infernalis del Parque Ecológico Chipinque, en Nuevo León, México. Después de acondicionarlos a las unidades experimentales, los ejemplares depositaron sus huevos y medimos la masa relativa de nidada (MRN) y el porcentaje de peso perdido. Observamos que las hembras perdieron más del 60% de su peso después de ovopositar y la MRN alcanzo los 0.44g, un esfuerzo reproductor igual o incluso mayor al de otras lagartijas ovíparas y vivíparas que no presentan cuidado parental; así mismo observamos variaciones en cuanto al cuidado parental.
Museos: una historia
Authors: Flores-Villela Oscar Alberto
Published: June 2023

Este libro presenta una historia resumida y muy interesante de una gran variedad de museos en el mundo. Conociendo a John Simmons como el técnico de la colección de anfibios y reptiles de Kansas University, yo esperaba una historia de los museos de historia natural. Me ha sorprendido gratamente la lectura de este libro, ya que presenta el desarrollo de los museos con una visión mucho más amplia. Simmons relata cómo a partir de los coleccionistas de objetos y las colecciones que se ensamblaron a lo largo del tiempo, se formaron los primeros museos hasta llegar a los museos más modernos de nuestro tiempo.
AMELANISMO EN Trachemys venusta EN CUATIVERIO
Authors: Cupul Magaña Fabio Germán , Rosales Martínez Carlos Santiago , Escobedo-Galván Armando Hiram , Silva Francisco Javier
Published: June 2023

El amelanismo puede definirse como la falta de melanina (pigmentos negro-marrones) de toda o parte de la piel, incluidos los ojos, como resultado de la falla congénita y hereditaria de las células productoras de pigmento durante el desarrollo embrionario. Los reptiles amelanísticos (y también los albinos) pueden producir el pigmento xantina (rojo amarillo) y conservar así este tipo de coloración. Hasta donde sabemos, no hay registros de amelanismo en tortugas dulceacuícolas Trachemys venusta criadas en cautiverio. Aquí describimos el color aberrante de tres especímenes (dos adultos y un juvenil): pigmentación roja del iris del ojo y resto del cuerpo con tonos blanco ahumado, amarillo, verde y naranja. Este tipo de aberración de color es bastante rara en la naturaleza, pues los individuos afectados pueden estar en desventaja en su entorno.
Sobre Carlos Manuel Valdés, Ensayos de historias nordestinas
Authors: Ortiz C. Javier E.
Published: June 2023

Reseña sobre Carlos Manuel Valdés, Ensayos de historias nordestinas, ed. de Alejandro Beltrán (Saltillo: Gobierno del Estado de Coahuila de Zaragoza, Secretaría de Cultura de Coahuila, 2021), 364 pp.
Generación de caudales medios a partir de registros diarios de precipitaciones utilizando un modelo de tanques: caso de estudio, cuencas en la zona minera del sur del Cesar
Authors: Rodríguez Diaz Héctor Alfonso , Otálora Carmona Andrés Humberto
Published: June 2023

Este artículo presenta los análisis y resultados de los estudios realizados por el Centro de Estudios Hidráulicos de la Escuela Colombiana de Ingeniería correspondiente a la generación de series de caudales medios diarios en las cuencas que drenan la zona minera en el sur del Cesar, aplicando el modelo de tanques utilizado en el software hec-hms. La investigación ha desarrollado una metodología para estimar, para cada subcuenca, series diarias de caudales medios diarios a partir de registros de precipitaciones y series diarias de evapotranspiración potencial. La metodología incluye la determinación de parámetros iniciales del suelo, de la cobertura vegetal y coeficientes de reducción de la evapotranspiración potencial. El modelo describe la calibración del modelo a partir de los registros diarios de caudales de estaciones localizadas en diferentes puntos sobre el cauce principal de la cuenca en estudio. Tomando como punto de partida los valores iniciales del modelo, se ajustaron los parámetros del suelo (velocidad de infiltración, capacidad de campo, coeficiente de cultivo, almacenamiento inicial) y los factores de reducción de la evapotranspiración potencial hasta conseguir una similitud entre los caudales medios diarios registrados y los caudales medios diarios modelados. El contraste de los resultados se llevó a cabo aplicando diferentes metodologías que permitieron estimar la correlación entre los datos modelados y los datos observados.
Evaluation of narrowband coupling techniques against frequency variation
Authors: Paz Penagos Hernán , Umaña Mateo
Published: June 2023

This article presents the design of two couplers using a simple stub, one in series and one in parallel, and a coupler design using a quarter lambda section. The aim is to compare the behavior of the frequency variation for a passing bandwidth through the transmission line, considering their respective variation in the lengths in which the couplers are located and the distances of the stubs. In such a way, that each design can be compared and analyzed to determine which of all three is the best coupler in terms of low impacts due to a passing bandwidth. For this, each design is made with the help of the software Amanogawa (Amanogawa.com, s. f.) and by means of the Smith chart. Similarly, the simulation of each one is carried out and through a physical experiment, stub in parallel, the results obtained are corroborated. Observing that the parallel stub method proves to be the most optimal, in terms of implementation and acceptance of a higher bandwidth pass-through variation.
Análisis del impacto de los subsidios sociales: propuesta para mejor asignación en República Dominicana
Authors: Llaugel Felipe , Llaugel Melanie
Published: June 2023

En este trabajo se analiza el alcance y costo de la protección social implementada en la República Dominicana desde el 2004, tomando en cuenta sus principales dimensiones y la efectividad de la misma desde el punto de vista de la solución a la que va dirigida. El choque provocado por la pandemia del 2020 afectó considerablemente a la población vulnerable y el volumen y variedad de los subsidios sociales no han podido satisfacer los retos presentados, dado que la población necesitada de ayuda aumentó, y los recursos del Estado son limitados. Metodológicamente, se propone el uso de gráficas dinámicas para analizar simultáneamente variables de interés, así como la adaptación y aplicación del análisis de envoltura de datos (DEA por las siglas en inglés) para medir la eficiencia en la asignación de los subsidios sociales más importantes. Se concluyó que la combinación novedosa de las técnicas empleadas mejora la asignación de los subsidios. Finalmente, apoyados en una plataforma web para su visualización, se presentan sugerencias para mejorar las políticas públicas de distribución de los subsidios.
A Monitoring System for Cyber Bullying Activities using Stochastic Gradient Descent Classifier
Authors: Budhe Payal , Rane Dipalee
Published: June 2023

Abstract: Life has reached a stage where we cannot live without internet enabled technology. New devices and services are being invented continuously with the evolution of new technologies to improve our day-to-day lifestyle. At the same time, this opens many security vulnerabilities. Cybercrime may happen to any device/service at any time with worst ever consequences. Internet use today has a greater impact on young people than ever before. They view the internet and mobile phone networks as the two major communication frameworks that are crucial to our everyday lives and the formation of our identities. However, these technologies are often used improperly. Many internet users are the targets of bullying, which leaves the "target" completely perplexed. Cyberbullying is drastically increasing. The issue of cyberbullying is saddening because the system that enables communication and information flow is evolving into a risky "site" to visit. Cyberbullying affects people all across the world, not just in one nation. United States have begun to enact laws that are focused on cyberbullying. Other countries have adopted laws against bullying that apply to both regular bullying and cyberbullying. The internet gives users the option to browse anonymously and to create profiles with secret identities. Our proposed structure can significantly increase the existing methods detection capacity in actual social network scenarios while effectively making up for their drawbacks.
Dehazing of Multispectral Satellite Images
Authors: G S Ananya , Getzi S Dr. Irene
Published: June 2023

Abstract: Dehazing multispectral satellite images is a crucial remote sensing activity since it raises the calibre and precision of satellite images. This research paper presents a comparative analysis of two approaches, namely histogram equalization and an algorithm that combines boundary constraint and contextual regularization methods for efficient dehazing of multispectral images. The algorithms successfully eliminates haze from multispectral satellite images, while preserving their features and structural integrity. Experimental results demonstrate that the latter approach outperforms the other dehazing algorithm in terms of both visual quality and quantitative measurements.
A Review of Various Optimization Strategies for Handling Optimal PMU Placement Problems
Authors: Negi Wilis , Thakur Ritula
Published: June 2023

Abstract: The Phasor Measurement Unit (PMU) is the most fundamental power system technology that is utilized to protect, monitor, and control power networks. It not only allows real-time, synchronized voltage measurements on the buses but also the current phasor of lines connected to the buses where these PMUs are placed. The positioning of PMUs at each bus node is unnecessary and is restricted by the installation's high cost and complexity. As a result, the fundamental goal of Optimal PMU placement (OPP) is reducing the total no. of PMUs along with maximum observability, while simultaneously considering measurement redundancy. There are several methods for fixing this problem, and they fall into two categories: Metaheuristic methods and mathematical approaches. This study examines a variety of optimization strategies for handling OPP problems
Study on Bitumen Modified with Crumb Rubber and PVC
Authors: Shakya Dhruv
Published: June 2023

Abstract: This study investigates the mechanical and rheological properties of bitumen modified with crumb rubber and polyvinyl chloride (PVC). The crumb rubber and PVC were added to bitumen at varying percentages and the resulting modified bitumen was tested for its viscosity, penetration, softening point, and elastic recovery. The results show that the addition of crumb rubber and PVC to bitumen improves its viscosity and elastic recovery properties, while reducing its penetration and softening point. The study also explores the optimal percentage of crumb rubber and PVC for modifying bitumen to achieve the desired mechanical and rheological properties. Overall, the study highlights the potential of using crumb rubber and PVC as sustainable additives for improving the performance of bitumen in road construction.
Experimental Analysis and Remediation Rate of Copper and Nickel Contaminated Industrial Site Soil Using Biochar
Authors: Priya G. Lakshmi , Satheeskumar V.
Published: June 2023

Abstract: The most crucial element for construction purposes is healthy and good soil. Through the incorrect disposal of carcinogenic compounds, which seeps into the earth and degrades soil quality, heavy metals and metalloids can contaminate soil. The goal of this project is to turn biomass into biochar and re-apply it to the soil in order to disrupt the source-receptor pathway, which will lead to heavy metal-free soil and an improvement in soil characteristics. Biochar is a material made of waste biomass that is highly porous, carbon-rich, and fine-grained. Pyrolysis is a process in which biomass is subjected to thermochemical conversion without oxygen. Rice husk biomass was pyrolyzed in a muffle furnace at temperatures between 500 and 700 °C to create the biochar that was employed in this experiment. Through physical adsorption or an ion exchange mechanism, biochar has the ability to remove heavy metal ions like copper and nickel. The soil used in this study was gathered from the Kurumbapalayam, Coimbatore, electroplating factory. AAS was used to evaluate soil samples in order to measure the amount of heavy metals present. A method that is useful for calculating the amounts of trace elements contained in the soil sample is the use of an atomic absorption spectrometer (AAS). In order to determine the presence of metal oxide X-Ray Diffraction was done and to know the connection between the biochar and the soil, scanning electron microscopy (SEM) was done. Using a direct shear test, the shear strength of soil treated with various amounts of biochar was evaluated. Additionally evaluated were the soil's compaction characteristics and pH fluctuation in response to the addition of various biochar percentages. The outcome shown that adding biochar to the soil neutralises heavy metals and enhances the characteristics of the soil.
Finite Element Based Static and Dynamic Vibration Analysis of a Beam with Axial Variation of Material Properties
Authors: Biswal Alok Ranjan , Biswal Deepak Ranjan , Senapati Rasmi Ranjan , Dash Abinash Bibek , Prusty Poonam , Mohapatra Shibabrata , Panda Sanjeev
Published: June 2023

Abstract: The study examines the vibration analysis of a damped cantilever beam with nonuniform variation in material properties using finite element methods. With power modification of material parameters in the axial direction, the static and dynamic response of a prismatic rectangular beam with damping has been examined. For the finite element approach, two noded beam elements with two degrees of freedom at each node were evaluated. The power law variation of material properties was used throughout the investigation. This research investigated the effects of proportional damping on displacement, velocity, and acceleration responses. The proposed beam's mass, stiffness, and damping matrices were calculated using Hamilton's concept. In the temporal domain, the Newmark Method has been utilized
A Review on Recycle of Waste Lubricant Oil and its Properties Enhancement
Authors: Mandloi Harshit , Thakur Lokendra Singh
Published: June 2023

Abstract: Continuous use and disposal of lubricating oil causes land, water and air pollution and also increases dependence on crude oil. This is the reason for the spread of disease, which affects every living being. Reuse of waste oil is the easiest option to avoid such pollution and dependence on crude oil. Another benefit of reusing waste oil is converting waste into money. Recycling waste lubricating oil has become an increasingly important aspect of sustainable waste management and resource conservation. Lubricant oil is made with 90% of base oil and rest of additives. In the lubricant oil, Base oil is never spoiled but after continues use of lubricating oil, it loses their properties because of continues friction, heavy load, and dirt metals absorbed hence it’s become waste oil. Here, we review the methods available to recycle the waste oil with the help of various treatment including acid treatment, clay treatment, adsorption, and solvents. The viscosity modifiers and additives used to make the SAE (Society of Automotive Engineers) grade recycled oil have also reviewed.
Battery Level Indicator-A Novel Approach
Authors: Chakraborty Arijit , Dhar Palasri , Pal Koushik , Ghosal Antara , Majumdar Anurima , Banerjee Avali , Biswas Suparna , Roy Sunipa
Published: June 2023

Abstract: This paper aims to design a simple and cheap Battery level indicator.The background information of circuit, operations and uses of the indicator. Basic elements required to construct Battery-Level Indicator as well as the design criteria for the constructed indicator. This paper will present a circuit that lets us know the battery level of a device from the number of LED glowing and display on LCD. The Battery-Level Indicator circuit is successfully constructed. This indicator is capable to indicate the status of battery. The performance and limitations of this indicator are discussed in the project report.
Improvement Proposal based on the Optimization of Environmental Variables for the Production of an Aquaponic System (Greenhouse) at the Campus "Los Robles", Fundación Universitaria de Popayán, Colombia
Authors: Rivera Edwin , Quijano Margie V. , Imbachi Richard M. , Sanchez Sebastian , Alban Yazmin A. , Flor Yhoan V.
Published: June 2023

Abstract: The research focuses on the analysis of environmental variables and the operation of a greenhouse used for the production of fish and plants under aquaponic technology. It is important to mention the existence of studies on these techniques, although they do not represent and provide the totality of knowledge on the processes that occur in them, from their design and materiality. This work intends to make a contribution to sustainable production in aquaponic systems (greenhouse), studying the variables that most affect the development of plants and fish. The research was carried out in the aquaponic prototype of the "Los Robles" campus of the Fundación Universitaria de Popayán, Colombia. Initially, the effect of the physical and environmental parameters of the greenhouse was analyzed, such as design, production area, structure, climate and environment, which are variables that influence the productive performance of the greenhouses (fish and plants installed). With the results obtained from the analysis of environmental variables, improvements are proposed to optimize the production system. This proposal aims to contribute to food security and the social and productive reactivation of the communities in the region.
Social Networking Site Use and Restricted Eating Among College Students
Authors: Lu Xue , Zhang Yiran , Gong Huoliang
Published: June 2023

Use of social networking sites and dieting seem to have become common phenomena in our lives, and the pursuit of appearance and self-focus play an important role in this. Using sociocultural theory and social comparison theory we explored the relationship between social networking site
use and restricted eating, as well as the mediating role of appearance perfectionism and the moderating role of self-focus. We surveyed 1,252 college students in China. The results were as follows: (a) Social networking site use had a positive predictive effect on college students' restricted
eating, (b) appearance perfectionism played a mediating role between social networking site use and restricted eating among college students, and (c) self-focus played a negative moderating role between appearance perfectionism and restricted eating among college students. The results have
revealed factors influencing restricted eating in a college student population, which may provide inspiration for the treatment of disordered eating.
Medicinal Importance of Azadirachta indica: An Overview
Authors: Devi Jyoti , Sharma Ram Babu
Published: June 2023

Background: The neem tree has a long history of being referred to as a "wonder tree." Since the time of the Vedic civilization, neem has been used therapeutically in many different ways in India. The various components of the neem tree, including the stem, bark, roots, leaves, gum, seeds, fruits, and flowers, have a no. of chemical constituents and have been used as traditional medicines. The seeds, leaves, blossoms, and bark of this tree, are used for treating various diseases. Since ancient times, neem tree extracts have been widely employed in health management because they possess a number of health-promoting qualities. Some of the chemical constituents are named quercetin, azadirachtin, a number of limonoids, nimbosterol, etc.

Objective: The aim of this review is to highlight the potential of Azadirachta indica in the treatment of various ailments and prospects associated with the delivery of Azadirachta indica.

Methods: We reviewed the literature from journal publication websites and electronic databases, such as Bentham, Springer, Science Direct, PubMed, Scopus, etc.

Results: The abundant availability of sources of Azadirachta indica makes a point in favor of exhaustive exploration of this plant. This plant has been used in the treatment of a number of ailments from ancient times by human beings and these are reported to be having anti-bacterial, anti-fungal, anti-viral, anti-inflammatory, anti-cancer, antihyperglycemic, and antioxidant potential.

Conclusion: There are a number of health benefits of Azadirachta indica. The neem tree (Azadirachta indica) is found to have various medicinal/pharmacological actions.

Keywords: Azadirachta indica, quercetin, carcinogenic, pharmacological effect, hepatoprotective, peroxidation.
Polimorfismos de nucleótido simple en hormonas asociadas al crecimiento muscular en ovinos criollos colombianos
Authors: Sarmiento Paul Nicolás , Ariza Manuel Fernando , Ortiz Yurany Teresa , Susan Lorena Castro Susan Lorena Castro
Published: June 2023

Objetivo. Determinar Polimorfismos de Nucleótido Simple (SNPs) presentes en los genes de la Hormona del Crecimiento (HC) y del Factor de Crecimiento Semejante a la Insulina 1 (IGF-1) y su asociación con el crecimiento muscular en ovinos de pelo criollos colombianos. Materiales y métodos. Se seleccionó una población de 100 ovinos, de tres regiones diferentes: Valles interandinos, Piedemonte Llanero y departamento de Córdoba, sometidos a diferentes sistemas de producción. La identificación de polimorfismos en los genes se realizó mediante las técnicas de Reacción en Cadena de la Polimerasa (PCR) y de Polimorfismo Conformacional de Cadena Sencilla (SSCP). Resultados. Se identificaron los genotipos AA, AB y BB para dichos genes. Las frecuencias alélicas para los marcadores HC, IGF-1 (IGFov-1, IGF1ov-2 e IGF1ov-3) fueron de 58,9, 36,87, 53,76 y 56,81% para el alelo A, respectivamente, y de 41,41, 63,13, 46,24 y 43,18% para el alelo B, respectivamente. Asimismo, se determinaron las frecuencias genotípicas para cada marcador a nivel poblacional, calculado a partir del equilibrio de Hardy-Weinberg con un análisis de correlación Fis. Conclusión. Los marcadores seleccionados presentaron un alto nivel de homología en la población seleccionada, lográndose determinar que existe un alto porcentaje de individuos heterocigotos con base a los marcadores evaluados.
Gobernanza territorial para la salud en Medellín y el cuidado comunitario frente a la COVID-19
Authors: Chavarria-Guzmán Kathleen , Martínez-Herrera Eliana , Hernández-Carmona David , Olga Lucía Ostos Ortiz Olga Lucía Ostos Ortiz
Published: June 2023

Introducción. Existen enormes desafíos para la medición de la gobernanza debido a la diversidad de aproximaciones poco reconocidas entre actores involucrados y los ajustes en las políticas de salud. Objetivo. Identificar acciones de gobernanza territorial para el cuidado de la salud gestionadas por líderes comunitarios durante el segundo pico de la pandemia COVID-19 para el fomento y resiliencia comunitario. Materiales y métodos. Se aplicó un cuestionario, de cinco dimensiones y 43 preguntas, a 139 líderes de las comunas de Castilla, Belén y Guayabal. Se utilizó la prueba chi cuadrado de Pearson para medir diferencias por comuna y se realizó un análisis de correspondencia múltiple para explorar aspectos espaciales y relacionales. Resultados. Evitar reuniones (p=0,002), mantenerse informado (p=0,034), participar en redes de apoyo (p=0,051), realizar campañas informativas (p=0,017), incentivar actividades para recuperar la economía (p=0,027), la participación en espacios virtuales (p=0,004), el apoyo a familias de escasos recursos (p=0,009) y a los más vulnerables (p=0,002) fueron algunas de las acciones medidas, encontrando un manejo diferenciado por los líderes de cada comuna. En el ACM se encontró un nivel de correspondencia alto respecto a las acciones de cuidado y  utocuidado motivadas por el líder, un nivel medio frente a las características de los entornos y las acciones gestionadaspor el líder y un nivel bajo en las acciones colectivas. Conclusión. Se evidencian acciones orientadas a una gobernanza territorial para salud en la promoción de la salud para hacer frente a la COVID-19 en los líderes comunitarios de las comunas estudiadas.
Colangiopatía pos-COVID-19, una enfermedad emergente: serie de casos
Authors: Peña Amaya Rafael Gregorio , Vargas Rómulo Darío , Leguizamo Ana María , ´Rincón Sánchez Reinaldo Andrés Mauricio , Muñoz Velandia Oscar Mauricio
Published: June 2023

Introducción: la colangiopatía pos-COVID-19 es una entidad nueva caracterizada por esclerosis del tracto biliar y elevación de fosfatasa alcalina en el paciente críticamente enfermo. Esta serie de casos describe la experiencia de un hospital de referencia en Latinoamérica.
Métodos: serie de casos que incluye a pacientes con enfermedad por coronavirus de 2019 (COVID-19) confirmada y elevación posterior de fosfatasa alcalina > 3 veces del valor normal, asociados a anormalidades en las vías biliares documentada por colangiorresonancia o colangiopancreatografía retrógrada endoscópica (CPRE). Se describe la presentación clínica, hallazgos imagenológicos, complicaciones y tratamiento.
Resultados: se incluyeron a 8 pacientes (56,5 ± 9,2 años, 62,5% hombres). Todos presentaron neumonía por coronavirus del síndrome respiratorio agudo grave de tipo 2 (SARS-CoV-2) previo a desarrollo de colangiopatía, y requirieron ventilación mecánica. Cuatro pacientes (50%) recibieron sedoanalgesia con ketamina y ocho (100%) con propofol. Todos presentaron infecciones (colangitis/abscesos hepáticos) por bacterias gramnegativas. El nivel pico de fosfatasa alcalina durante el seguimiento fue en promedio 1646,12 ± 611,3. Los hallazgos imagenológicos incluyeron dilatación de la vía biliar intrahepática (100%) y extrahepática (87,5%). En el 75% se extrajo el molde biliar de apariencia negra. Siete pacientes presentaron recurrencia de colangitis y tres pacientes fueron referidos a consulta de pretrasplante hepático.
Conclusiones: la colangiopatía pos-COVID-19 está caracterizada por colestasis grave con dilatación de la vía biliar intra- y extrahepática, formación de moldes biliares y colangitis recurrente. En nuestro estudio se plantea como hipótesis una posible relación con sepsis por bacterias gramnegativas y uso de medicamentos sedativos. Se requieren nuevos estudios para establecer el manejo más adecuado para estos pacientes, que hasta el momento presentan una morbimortalidad desfavorable a largo plazo.
Caracterización de los pacientes con distintos subtipos de acalasia según la manometría de alta resolución en un hospital de referencia en Colombia
Authors: Amaris Vergara Amaury , Hani Albis Cecilia , Muñoz Velandia Oscar Mauricio , Ardila Andres Felipe , Ramirez Barranco Rosangela , Sierra Peña Julian
Published: June 2023

Introducción: Existe información limitada sobre las características clínicas y manométricas de los diferentes subtipos de acalasia. Este estudio describe dichas características en pacientes manejados en un hospital de referencia en Colombia

Método: Estudio descriptivo observacional incluyendo pacientes con diagnóstico de acalasia por manometría esofágica de alta resolución, manejados en el Hospital Universitario San Ignacio, Bogotá, Colombia entre 2016 y 2020. Se describe las manifestaciones clínicas, hallazgos manométricos, tratamiento utilizado y respuesta al mismo según el subtipo de acalasia.

Resultados: Se incluyeron 87 pacientes (Mediana edad 51 años, 56.4% mujeres). La mayoría tipo II (78,1%), seguido por tipo I (16%), y tipo III (5,7%). Todos presentaron disfagia, 40.2% dolor torácico y 27.6% reflujo gastroesofágico.  La clínica y los valores de IRP (Mediana 24 mmHg, RIQ 19 - 33), presión del EES (Mediana 63 mmHg, RIQ 46 - 98) y EEI (Mediana 34 mmHg, RIQ 26 - 45) fueron similares en los diferentes subtipos   El aclaramiento esofágico fue incompleto en todos los pacientes. Entre 35 pacientes que recibieron manejo intervencionista, la miotomía de Heller fue la intervención más utilizada (68,5%), seguido por la dilatación esofágica (28,6%). La totalidad de estos pacientes presento mejoría sintomática con mediana de Eckardt pretratamiento de 5 (RIQ 5–6) y pos tratamiento de 1 (RIQ 1-2).

Conclusiones: La acalasia tipo II es la más común. La clínica y hallazgos manométricos y respuesta a tratamiento son similares entre subtipos de Acalasia. En Colombia esta entidad se comporta de forma similar a lo reportado en otras partes del mundo.
Síndrome de Budd-Chiari por COVID-19: una asociación poco frecuente
Authors: Velasco Castro Julio Cesar , Patarroyo Maria Paula , Galan Juan David , Garcia Agudelo Lorena , Vargas Rodriguez Ledmar Jovanny
Published: June 2023

Introducción: el coronavirus del síndrome respiratorio agudo grave de tipo 2 (SARS-CoV-2) es un virus que puede causar infecciones respiratorias y poner en riesgo la vida de los pacientes. Aunque afecta principalmente las vías respiratorias, se pueden presentar manifestaciones clínicas extrapulmonares como estados de hipercoagulabilidad, lo que causa patologías como enfermedad cerebrovascular e infarto agudo de miocardio, y en casos menos frecuentes, síndrome de Budd-Chiari.
Caso clínico: se presenta el caso de una paciente que ingresó al servicio de urgencias por disnea de medianos esfuerzos, deterioro progresivo de la clase funcional y edema en extremidades inferiores asociado con tos, fiebre y adinamia. Refirió el antecedente de infección por enfermedad por coronavirus de 2019 (COVID-19) un mes antes y la tomografía de abdomen contrastada reveló síndrome de Budd-Chiari subagudo de la vena subhepática media asociada a trombosis del ventrículo derecho con prueba positiva para SARS-CoV-2.
Conclusiones: El síndrome de Budd-Chiari es de origen multicausal, principalmente por estados de hipercoagulabilidad o presencia de neoplasias que ocasionan disrupción de la función del hígado o causan la ocupación de espacio sobre el drenaje venoso hepático; sin embargo, en el contexto de la pandemia de SARS CoV-2, aún se conoce muy poco la heterogeneidad de su patogénesis, como es la hipercoagulabilidad de la COVID-19 y el síndrome de Budd-Chiari, por lo que inferimos que están altamente relacionados.
Divertículos múltiples en intestino delgado como causa de hemorragia digestiva masiva. A propósito de un caso
Authors: Avila Almanza Fredy , Rincón Sánchez Reinaldo Andrés Mauricio , Buitrago Tamayo Andrea Carolina
Published: June 2023

Se presenta el caso de una mujer de 71 años con múltiples comorbilidades que ingresó por hematoquecia sin inestabilidad hemodinámica. Se inició el estudio con una colonoscopia sin evidenciar la causa; durante la estancia hospitalaria presentó un aumento del sangrado, anemización e inestabilidad hemodinámica, por lo que se realizó una endoscopia digestiva alta sin hallazgos; posteriormente, se realizó una angiografía selectiva sin evidencia de sangrado activo. Ante el choque persistente se llevó a cirugía en la que se evidenció sangre proveniente del intestino delgado secundaria a la presencia de divertículos múltiples en el yeyuno.
Hemorragia gastrointestinal por diverticulosis yeyunal una complicación infrecuente: reporte de un caso
Authors: Camelo Pardo Gianmarco , Ortega Torres Francisco Jose , León Diaz Adriana Maritza , Tarazona Leon Cristian Eduardo
Published: June 2023

Introducción: Los divertículos de intestino delgado presentan una incidencia del 0.6% al 2%, su localización a nivel del yeyuno es una alteración poco frecuente y dada su baja sospecha clínica se retrasa el diagnóstico oportuno. La manifestación clínica de esta patología se encuentra correlacionada con el desarrollo de complicaciones las cuales ocurren entre el 15 al 30% de los pacientes, requiriendo el 10% de estos pacientes, manejo quirúrgico.

Caso clínico: Paciente adulto medio que cursó con una complicación secundaria a la presencia de un divertículo del yeyuno sangrante, al cual se le dio manejo quirúrgico, con un resultado satisfactorio.

Este articulo tiene como objetivo describir la diverticulosis yeyunal que, aunque poco frecuente, puede generar compromiso importante en quien la padece, lo que prioriza su sospecha clínica como diagnóstico diferencial causante de hemorragia gastrointestinal, así mismo esclarecer métodos diagnósticos y estar al tanto de las diferentes opciones terapéuticas que existen incluyendo el manejo quirúrgico.
Photoplethysmography for non-invasive diagnosis of cold urticaria
Authors: Fomina Daria , Serdotetskova Sofia , Machikhin Alexander , Volkov Mikhail , Guryleva Anastasia , Bizjak Mojca , Bukova Valeriya , Lebedkina Marina S. , Andrenova Gerelma , Mukhina Olga , Irina Mukatova , Danilycheva Inna , Maurer Marcus
Published: June 2023

Background: Cold urticaria (ColdU) is a common type of chronic
inducible urticaria. Patients with typical ColdU develop wheals in
response to standard cold stimulation tests (CSTs), an ice cube (ICT) or
TempTest . As of now, the evaluation of CST response
is visual and subjective. Validated, robust, and objective test readouts
lacking today are needed. Methods: We subjected 63 patients (39
with typical ColdU and 24 with atypical ColdU) and 15 healthy controls
(HCs) to TempTest CSTs and critical temperature
threshold assessments. Blood microcirculation photoplethysmography (PPG)
measurements were performed 5 min before and 10 min after the ICT on the
volar forearm. Results: PPG amplitudes reflected normal
baseline skin blood perfusion in patients with typical or atypical
ColdU. Ice cube CSTs induced a marked increase in blood perfusion and
PPG amplitudes in typical but not atypical ColdU, with distinct pre-post
CST changes in PPG amplitudes in the former. The ratio of
post-provocation and baseline PPG amplitudes ( R) in typical ColdU patients exceeded that in atypical
ColdU patients and HCs more than 3-fold. Almost all typical ColdU
patients (98%), but only 13% of atypical ColdU patients and 7% of HCs
had R >3. PPG results matched
those of CSTs in 94% of all tested individuals. Conclusion:
Photoplethysmographic assessments of CST responses appear accurate and
provide objective readouts. PPG may be of use in diagnosing ColdU,
distinguishing typical and atypical ColdU, and more precise threshold
testing.
Effects of ecological factors and reproductive strategies on germination capability of Ailanthus altissima (Mill.) Swingle
Authors: Cocco Alessandro Di , Panero Ilaria , Fabrini Giuseppe
Published: June 2023

The tree of heaven Ailanthus altissima is one of the most
invasive plant species in Europe and Italy and poses a threat especially
in urban environments, where it damages man-made structures. A deeper
comprehension of how germination traits respond to environmental factors
could help elucidate the process of invasion. Germination tests on
A. altissima seeds collected at different altitudes were carried
out at different light conditions (12-hr light/12-hr darkness and
continuous darkness) and temperature regimes (15-6 °C, 20-10 °C and
25-15 °C). A further test was also performed to assess the germinative
response of seeds retained on the plant during winter. Seeds have been
demonstrated not to have clear preferences for temperature and light,
nor to show an effect of the altitude at which they develop on their
germination capacity. This characteristic makes A. altissima
highly adaptable to different types of environments and not restrained
to specifical conditions. Moreover, the continuous release of seeds
throughout the year may maximize the chances of a successful
germination. The nature of pioneer species of A. altissima
emerges already during its reproduction and germination, both in its
tolerance to different environmental conditions and in the adoption of a
reproduction strategy oriented towards the extreme of r-strategist
species, contributing to the invasiveness of the species.
The Mediating Role of Sensory Processing and Attentional Control in the Relationship Between Misophonia and Severity of Disability, Emotional Traits, and Disgust Propensity in Iranian College Students
Authors: Ghorbani Sareh , Asadi Dr. Dorsa Mazaheri , Ashouri Ahmad , Farahani Hojjatollah , Saneh Niusha Akbari , Abedi Zahra
Published: June 2023

Background: The current study investigates how sensory
processing and attention management mediate the associations between
misophonia and the degree of disability, emotional characteristics, and
disgust propensity. Methods: The structural equation modeling
approach was applied on the data gathered from 495 students from public
colleges through convenience sampling in order to carry out this study.
Results: The findings demonstrated that misophonia
significantly affects both attention control and sensory processing. It
was also discovered that attention control has a mediating role in the
relationships between misophonia and disgust propensity as well as in
the relationship between misophonia, depression, and anxiety.
Keywords: Misophonia, Sensory Processing, Attention Control,
Severity of Disability, Emotional Characteristics, and Disgust
Propensity