bluuebunny/crossref_metadata_2025 huggingface dataset:
La Práctica Pedagógica. De la Reflexión al Pensamiento Crítico
Authors: Mina Maritza Bibiana
Published: November 2024

La reflexión sobre la práctica pedagógica ha confirmado ser el camino para la deconstrucción del saber y el quehacer del docente. En consecuencia, a partir de allí, se esperan nuevas elaboraciones epistémicas alrededor de este saber pedagógico, didáctico y disciplinar. Así mismo, se instala como una ruta desde la cual se puede configurar el pensamiento crítico de los docentes, dados los elementos constitutivos derivados de la reflexión y que se asocian a este campo de conocimiento. Teniendo en cuenta esto, la investigación se propuso analizar cómo la reflexión sobre la práctica pedagógica del docente en formación y en ejercicio posibilita la configuración de su pensamiento crítico. Lo anterior desde un paradigma hermenéutico, con enfoque cualitativo, apoyado en una etnografía crítica. Los resultados evidencian la coexistencia de diversas interpretaciones conceptuales sobre el pensamiento crítico; la importancia de mejorar los procesos de reflexión sobre la práctica pedagógica con miras a que sea rigurosa y de orden crítico; y revisar las apuestas curriculares de formación docente en aras de posibilitar la configuración del pensamiento crítico para la transformación de la práctica.
THE VERIST VERGA IN CONTEMPORARY MUSIC
Authors: Mele Floriana
Published: November 2024

Between the end of the 20th century and the new millennium, while the critical debate on Giovanni Verga seemed to weaken and at the same time his influence on contemporary literature diminished, numerous artists in the musical world drew from the experimentalism inherent to the Catanian writer’s verist oeuvre. Through performances that combined theatre, dance, and music, often involving contaminations among different styles, the works of verist Verga transcended the geographical boundaries of Sicily to reach the ‘Big Apple’ and even reverberated in expressive pop-culture forms, including pop music, combining more traditional pieces in Sicilian dialect with rap sounds. Although the choice of musical works presented in this paper is limited to those based on the novel I Malavoglia and a few short stories, within this corpus containing various reinterpretations by contemporary artists one can find stylistic and thematic inspirations that reflect the cornerstones of Verga’s expressive innovation. This is, therefore, a tangible sign that the Etnean author, through the experimentation of his verist workshop, remains relevant in contemporary times.
EDUCAZIONE BILINGUE – STORIA IN ITALIANO
Authors: Papp Beáta
Published: November 2024

In questo lavoro prestiamo attenzione ai licei bilingui italo-ungheresi Kodály Zoltán di Pécs, Szent László di Kőbánya, Xántus János di Budapest e Csokonai Vitéz Mihály di Debrecen. L’obiettivo del presente studio è quello di esaminare − mediante l’analisi statistica − i risultati raggiunti nella materia di Storia svolta in lingua italiana all’Esame di Stato a livello intermedio (N=295) concernente il periodo degli anni scolastici che vanno dal 2011/2012 al 2020/2021. L’innovazione della politica educativa ungherese degli anni Ottanta è stata l’introduzione dell’educazione bilingue, che finora è la formazione più adatta per l’insegnamento veicolare. In questo studio, inquadriamo la materia di Storia soffermandoci prima sulle due fasi dell’insegnamento bilingue, ovvero il periodo prima delle guerre mondiali e il periodo del dopoguerra. Successivamente prendiamo in considerazione l’argomento dell’Apprendimento Integrato di Lingua e Contenuto, alla luce del quale richiamiamo alcune ricerche relative alla materia di Storia. In breve presentiamo l’esame di maturità e concludiamo il saggio con la nostra ricerca condotta al riguardo.
Menjadi Ladies: Social Climber dan Gaya Hidup Hedonis Pada Remaja Putri di Kota Banjarmasin
Authors: Yurizal Irianti Utami , Damaiyanti Varinia Pura
Published: November 2024

The lifestyle applied by ladies who are still teenagers in Banjarmasin City is an interesting thing to investigate more deeply. This research aims to find out in depth the background of teenagers doing social climber, the efforts made by teenagers to do social climber, and social climber in the perception of a ladies. This research uses descriptive qualitative method. The research instruments used observation and in-depth interviews. This research was conducted in Banjarmasin City. The results showed that a friendship environment that has a hedonic lifestyle is a form of lifestyle that emerged after the current massive modernization. Hedonic lifestyle or things that are considered fun are dominantly related to luxury. Teenagers who like new things, such as technology, the latest clothing models, the latest hairstyles, and others. The social climber's life has a self-created culture that encompasses a whole set of values and behaviors, which are considered self-discovery. Efforts are made to work, become the mistress of a rich man, and manipulate parents. Adolescent social climbers perceive that women's work has the opportunity to earn a lot of money in an easy way, and increase popularity. In some professions, women sometimes get lower salaries than men. The ladies' job in question is to serve men who are much older than the ladies, who are usually called om-om. Being a lady is not an easy job, sometimes getting violence, especially regarding health will be very vulnerable.
Perubahan Sosial Masyarakat Akibat Perkebunan Kelapa Sawit di Desa Barambai Karya Tani Kabupaten Barito Kuala
Authors: Faqih Ahmad , Khairussalam
Published: November 2024

The life of the community in Barambai Karya Tani Village, Barito Kuala Regency depends on the agricultural sector, but in 2007 it began to be replaced by the entry of oil palm plantations owned by PT Agri Bumi Sentosa (ABS). This research aims to find out and describe the factors that encourage people to accept oil palm plantations, and examine the social changes caused by oil palm plantations. The research method used is qualitative, with a phenomenological research type. Data were collected using participant observation, semi-structured interviews and documentation. Data were analysed using an interactive model, which consists of data reduction, data presentation and conclusion drawing. The results showed that the factors that encourage people to accept oil palm plantations are: PT Agri Bumi Sentosa (ABS) has obtained the Cultivation Rights Title (HGU); the declining productivity of agricultural land; and the opening of jobs as permanent employees and daily labourers in oil palm plantation companies. The income earned, both as permanent employees and daily labourers, can meet the needs of daily life, so the existence of oil palm plantations can improve the community's economy. The negative side is that oil palm plantations cause interactions between communities to decline, as well as the erosion of the gotong-royong culture. It is expected for PT Agri Bumi Sentosa (ABS) to actively involve the community in every decision-making, so that the potential of oil palm plantations can be maximised in a sustainable manner and minimise the negative impacts caused.
Pengaruh Isu Bullying Terhadap Kepercayaan Orang Tua Pada Pesantren di Kota Tanjung Pinang
Authors: Anggraini Resita , Khatijah Siti
Published: November 2024

Bullying cases that are often heard and occur in educational environments, including in Islamic educational institutions or pesantren, are a worrying phenomenon because of the impact of the bullying. This research aims to find out how the level of trust of parents in sending their children to pesantren with various news related to bullying cases in pesantren. The research method used is qualitative with a descriptive approach to describe and describe the problems studied. The research was conducted for 2 months, namely from May to June 2024. The theory used in this research is the Rational Choice Theory proposed by Jame S Coleman, which suggests that choice does not focus on what is chosen or what is the source of choice, but rather on the fact that it is believed that actions are taken as goals that are in accordance with the level of choice. The results showed that the pattern of violence committed by the bully was the same as what he had experienced, indicating that this culture has been attached and even become a stigma for santri. Various news about bullying in pesantren affect parents' confidence to send their children to pesantren. However, many parents still believe that pesantren is the best place to educate their children. Parents consider good education and the formation of their children's personality in the field of religion. It is important for parents to learn more and be selective in choosing pesantren to ensure their children's safety from the threat of bullying.
Phytocrene macrophylla var. macrophylla (Icacinaceae) - a new record for Thailand
Authors:   Plants of Thailand Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Pathum Wan, Bangkok 10330, Thailand., Songsangchun Apichart , Seelanan Tosak ,   Plants of Thailand Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Pathum Wan, Bangkok 10330, Thailand.
Published: November 2024

Phytocrene macrophylla var. macrophylla (Icacinaceae) is reported as a new record for Thailand. An updated description, photographs and a revised key to the genus in Thailand are provided.
PENGGUNANAAN BAHAN ADITIF MASTER GLENIUM ACE 8595 UNTUK MEMINIMALISIR POROSITAS PADA BETON
Authors: Fitriani Amelia Dwi , Mahardana Zendy Bima , Pasya Salman Alfaridh , Erwanda Niko Andika , Fathurrohman Nadi Rheiza , Qalby Atsfiela Dzulkhan , Okta Satria Perdana
Published: November 2024

Concrete has now become the most important material in the world of modern construction. The strength and durability of concrete are key factors that influence the strength and stability of buildings and infrastructure. Porosity refers to the degree to which concrete has void space within its structure. The higher the level of porosity, the lower the compressive strength of the concrete. This research aims to investigate the effect of adding type F additive, Master Glenium Ace 8595, on changes in porosity and increasing the compressive strength of concrete. Through laboratory experiments, we carry out analyzes of aggregate, workability, porosity and compressive strength of concrete. The research results showed that all the aggregates tested were suitable for use. The workability test produced dilute criteria, while the average porosity obtained was 8.05%. Compressive strength testing produced an average value of 23.56 MPa, indicating an increase of 8.69% from the planned concrete quality. This research concludes that concrete porosity must be considered to increase the compressive strength of concrete, because it has a significant influence on density and compressive strength. By keeping porosity at a low level and compressive strength at a high level, it can ensure that the concrete structure has good resistance to loads and the environment, as well as reducing the risk of damage and maintenance.
OPTIMASI DISTRIBUSI AIR IRIGASI MELALUI SISTEM GOLONGAN (STUDI KASUS DAERAH IRIGASI RONGKONG SELUAS 27.000 HA)
Authors: Rifai Muji , Wahyudi Agus Hari
Published: November 2024

The utilization of river water to support activities in the agricultural sector includes constructing water structures that function to channel or supply water to rice fields through weirs. The water required for rice fields is referred to as irrigation water demand. The amount of water needed in irrigated areas varies, necessitating a water distribution management system, one of which involves creating a crop planting schedule with a technical/rotational system, ensuring the water balance of an irrigation area is well managed. The aim of this research is to achieve the most efficient planting and water distribution plan for an irrigation area, considering the water balance as an indicator of the water management system in fulfilling irrigation water needs. The method used involves comparing the water balance of irrigation areas where water is supplied using a rotational system versus without. The research results show that the appropriate cropping pattern for an irrigation area of more than 25,000 hectares (ha) is to use a rotational system. For the Rongkong Irrigation Area (DI) with a size of 27,947 ha, it is divided into two groups: Group 1 includes: Rongkong Right Irrigation Area with 4,198.38 ha and Rongkong Left Irrigation Area with 6,497.56 ha; Group 2 includes: Rongkong Right Irrigation Area with 7,501.22 ha and Rongkong Left Irrigation Area with 9,749.22 ha. Before using the rotational system, a water deficit occurred in the first week of October, amounting to 0.22 m³/second. However, after implementing the rotational system, the water balance in the Rongkong Irrigation Area no longer showed any water demand deficit.
Two Fuzzy Clustering Algorithms Based on ARMA Model
Authors: Nomura Tomoki ,   Editorial Office, Kanzawa Yuchi
Published: November 2024

This study proposes two fuzzy clustering algorithms based on autoregressive moving average (ARMA) model for series data. The first, referred to as Tsallis entropy-regularized fuzzy c-ARMA model (TFCARMA), is created from k-ARMA, a conventional hard clustering algorithm for series data. TFCARMA is motivated by the relationship between the two clustering algorithms for vectorial data: k-means and Tsallis entropy-regularized fuzzy c-means. The second, referred to as q-divergence-based fuzzy c-ARMA model (QFCARMA), is created from ARMA mixtures, a conventional probabilistic clustering algorithm for series data. QFCARMA is motivated by the relationship between the two clustering algorithms for vectorial data: Gaussian mixture model and q-divergence-based fuzzy c-means. Based on numerical experiments using an artificial dataset, we observed the effects of fuzzification parameters in the proposed algorithms and relationship between the proposed and conventional algorithms. Moreover, numerical experiments using seven real datasets compared the clustering accuracy among the proposed and conventional algorithms.
Office Furniture Partition Space Design Based on Intelligent Domain Perception and Digital Twins
Authors: Zhang Jie ,   Editorial Office
Published: November 2024

With the increasing focus on sustainable development in society, intelligent domain perception and digital twin technology can be used to evaluate and optimize the design of office furniture. This study analyzed sensor data through machine-learning and data-mining techniques to identify patterns and trends in the office environment. Simultaneously, a digital twin model of office furniture partition space was established to simulate the usage of furniture partition space throughout its full lifecycle. When 50% of nodes fail, the minimum transmission energy mode was significantly better than the maximum greedy forwarding mode in terms of cumulative throughput. The distributed, event-based, unsupervised clustering algorithm successfully reduced communication energy consumption, and the lightweight gradient boosting machine algorithm achieved the best design optimization rate, with an improvement of 0.53%. The ratio of value-added time to non-value-added time increased by 56.3%. The study aimed to provide innovative ideas for the development of intelligent office environments, promote the design of office furniture toward intelligence and sustainability, and improve the adaptability and efficiency of the work environment.
Online Topological Mapping on a Quadcopter with Fast Growing Neural Gas
Authors: Junaedy Alfin ,   Editorial Office, Masuta Hiroyuki , Fuse Yotaro , Sawai Kei , Motoyoshi Tatsuo , Takagi Noboru
Published: November 2024

This paper presents an online topological mapping method on a quadcopter with fast-growing neural gas. Recently, perceiving the real world in 3D space has become increasingly important, and robotics is no exception. Quadcopters are the most common type of robot working in 3D space. The ability to perceive 3D space is even required in order to enable real-time autonomous control. Dense maps are simply unpractical, while sparse maps are not suitable due to a lack of appropriate information. Topological maps then offer a balance between computational cost and accuracy. One of the most well-known unsupervised learning methods for topological mapping is growing neural gas (GNG). Unfortunately, it is difficult to increase the learning speed due to the traditional iterative method. Consequently, we propose a new method for topological mapping, called simplified multi-scale batch-learning GNG, by applying a mini-batch strategy in the learning process. The proposed method has been implemented on a quadcopter for indoor mapping applications. In addition, the topological maps are also combined with the tracking data of the quadcopter to generate a new global map. The combination is simple yet robust, based on rotation and translation strategies. Thus, the quadcopter is able to run the algorithms in real-time and maintain its performance above 30 fps.
Plan de negocio para la producción y comercialización de agua mineral de manantial embotellada procedente de San Jerónimo de Surco (Huarochirí-Perú)
Authors:   , Alvarado Huamani Alex , Mendoza Casaverde Vladimir
Published: November 2024

La empresa PUKYUS MINERAL S.A.C. se posicionará dentro del mercado como una empresa líder en la industria de las bebidas saludables “SAN EBISU” gracias a nuestro enfoque en la calidad, la sostenibilidad y la innovación; mediante la implementación de un sólido plan estratégico, la empresa va a lograr destacarse por la buena producción eficiente, distribución logística optimizada y sus estrategias de marketing digital. El principal diferenciador de la empresa es el origen de su agua, extraída directamente de un manantial de montaña, el cual contiene propiedades minerales únicas y saludables, la planta de producción será de última tecnología para tener una buena filtración y purificación de calidad del agua mineral de manantial; además, la empresa integrará prácticas sostenibles en todos los procesos productivos, reduciendo su huella ambiental y comprometiéndose con la preservación de los recursos naturales. En cuanto a la estrategia de comercialización, la empresa enfocará sus esfuerzos en diferentes campos del mercado mayorista, minorista, tiendas locales y también en el desarrollo de una sólida presencia digital, aprovechando estrategias de marketing online para llegar a un público más amplio y fidelizar a sus consumidores. Adicionalmente la implementación de tecnologías avanzadas en su cadena de suministro le permitirá optimizar la distribución y garantizar la disponibilidad de sus productos en el mercado, gracias a esto la marca “SAN EBISU” gozará de una cobertura grande y disponibilidad inmediata en la zona de Lima Este específicamente en la localidad de Ate, gracias a su visión innovadora y su compromiso con la calidad y la sostenibilidad, además de contar con un equipo profesional de trabajo altamente capacitado en las áreas de producción, logística, administración y comercialización.
Mortalidad intrahospitalaria según las escalas quick SOFA y síndrome de respuesta inflamatoria sistémica en pacientes con diabetes mellitus tipo 2 del servicio de emergencia un hospital público peruano
Authors:   , Arismendi Gonzales Jorge Armando
Published: November 2024

La diabetes mellitus tipo 2 es una condición crónica que afecta a una parte significativa de la población mundial, con una incidencia y prevalencia en constante aumento. Entender los factores de riesgo que pueden impactar en la mortalidad de estos pacientes es decisivo para mejorar su atención clínica y los resultados de salud asociados. La capacidad de identificar marcadores de riesgo como la puntuación QSOFA y los criterios SIRS permite a los médicos de emergencia tomar decisiones más informadas sobre cómo manejar a estos pacientes. El objetivo es determinar la mortalidad intrahospitalaria según la escala quick SOFA y del síndrome de respuesta inflamatoria sistémica en pacientes con diabetes mellitus tipo 2 del servicio de emergencia del Hospital María Auxiliadora. Se realizará un estudio observacional, longitudinal de tipo cohorte retrospectiva. Se calculó un tamaño muestral de 303 participantes. Como instrumento se aplicará una ficha de recolección de datos y para el procesamiento de la información se usará estadística descriptiva e inferencial.
Calidad de servicio y fidelización de clientes en empresas de servicios de telefonía IP, Lima-2023
Authors:   , Ore Portal Diana Carolina , Vasquez Gamarra Jhonny Christopher
Published: November 2024

El campo de las telecomunicaciones es uno de los mercados más competitivos tanto en Perú como en el mundo entero. En el país existen compañías que le brindan a las pequeñas empresas el servicio de telefonía IP que consiste en tener una red de comunicación interna moderna a bajo costo a través del internet. Para obtener una ventaja competitiva estas compañías buscan fidelizar clientes, el problema es que la mayoría no logra hacerlo de forma correcta o eficiente, o por otro lado no entienden dónde deben centrar sus recursos económicos y estratégicos. Se buscó determinar la relación entre la calidad de servicio (CS) y fidelización de clientes (FC) en una empresa de servicios de telefonía IP. Enfoque cuantitativo, tipo aplicado, nivel descriptivo-correlacional, diseño no experimental. Muestra censal 100 clientes de la empresa Comunícate fácil S.A.C - Lima, evaluados mediante dos cuestionarios y con un nivel de fiabilidad determinado por el Alfa de Cronbach de (0.973) para la CS y (0,977) para la variable FC. Según los resultados existe una relación significativa y positiva entre las variables, obteniendo una Rho de Spearman 0.768 con un p-valor de 0.000 (p<0.05). Finalmente, los intentos fallidos de la empresa de telefonía IP por fidelizar clientes, responden directamente al paupérrimo desarrollo en las respectivas áreas de calidad de servicio, siendo importante fortalecer los equipos con una mejor capacitación, realizar ajustes en sus procesos logísticos e invertir más en el servicio ofrecido a los clientes.
Efecto de microorganismos eficientes de montaña sobre parámetros fisicoquímicos y microbiológicos de un compost a base de cascarilla de café
Authors:   , Aquino Quispe Jhoana Yoselin , Huaman Cervantes Karol Leonela
Published: November 2024

El cultivo de café es uno de los más importantes en el Perú, dedicado a la exportación por lo que se generan altas cantidades de biomasa y residuos, que al no ser tratados oportunamente pueden generar problemas ambientales; por lo que el compostaje puede representar una alternativa eficiente con el uso de microorganismos de montaña que incrementen su calidad. Por ello el objetivo fue demostrar el efecto de microorganismos de montaña sobre los parámetros fisicoquímicos y microbiológicos de un compost elaborado a base de cáscara de café, aserrín y estiércol de vacuno al que se le incorporó como tratamientos microorganismos de montaña a dosis de 2, 4, 6 y 8 litros por metro cúbico respectivamente y se incubó durante 20 semanas. Se encontró que el pH osciló entre 7,12 a 7,50 y según la dosis de microorganismos se reporta diferencia significativa en el contenido de levaduras, Bacillus spp, Pseudomonas spp, y actinomicetos, siendo mayor en el caso de dosis más altas respecto al control. Se reporta también mayor contenido de C.E, K, Ca tras la aplicación de microorganismos de montaña. Finalmente, los resultados evidencian que los ME mejoran la calidad de compost asociada al contenido de especies microbianas y parámetros fisicoquímicos.
Relación entre el consumo de productos ultraprocesados y el nivel de ansiedad en estudiantes adolescentes de una Institución Educativa Pública en Lima, Perú 2022
Authors:   , Mandujano Arellano Joseline Fernanda , Canziani Garcia Isabella
Published: November 2024

El objetivo de este estudio fue identificar la relación entre el consumo de alimentos y bebidas ultraprocesados y el nivel de ansiedad en adolescentes de 11 a 18 años en el año 2022. El estudio fue cuantitativo de corte transversal, realizado en 146 estudiantes de una institución educativa secundaria del distrito de Ate, Lima, Perú. Los participantes fueron seleccionados mediante consenso y se les entregó un cuestionario organizado. El análisis de los resultados mostró que el 71,2% de los estudiantes consumía alimentos y bebidas ultraprocesados de manera baja, el 26,7% de manera media y el 2,1% de manera alta. Del total de estudiantes, el 62,3% mostró ansiedad leve, el 36,3% ansiedad moderada y solo el 1,4% ansiedad severa. Se determinó que no existe correlación entre la cantidad de ansiedad y el consumo de alimentos y bebidas altamente procesados con un p valor de 0,411. Sin embargo, se encontró relación entre el nivel de ansiedad, el sexo femenino (p<0,001) y el grado de estudios (p<0,003).
Desarrollo de nuggets de pollo con adición de cáscara de pitahaya (Hylocereus megalanthus) como fuente de fibra dietética sobre la calidad nutricional y protección contra la lipoperoxidación del producto, Lima - Perú
Authors:   , Borja Gomez Abigail Cecilia , Gozalo Boggio Romina
Published: November 2024

En este estudio, se desarrollaron nuggets de pollo con adición de pulverizado de cáscara de Pitahaya (Hylocereus megalanthus) (PCP), como fuente de fibra dietética y compuestos bioactivos sobre la calidad nutricional y protección contra la lipoperoxidación, en tres concentraciones distintas (T1 – 0.6%, T2 – 0.7% y T3 – 0.8%) y se almacenaron refrigerados durante 20 días. La adición de PCP generó disminución en el pH de los nuggets y esto podría atribuirse al pH acidificado del PCP. Con respecto al color se evidenció diferencia significativa (p < 0.05) entre el control y los tratamientos, se observó que el T3 obtuvo mayor luminosidad y color amarillento, mientras que el control presentó mayor enrojecimiento. El análisis proximal demostró que no hubo diferencia significativa de cenizas entre el grupo control y los tratamientos, pero disminuyó el contenido de grasa significativamente, además de presentar diferencia significativa (p < 0.05) en proteínas totales. Así mismo, la adición de PCP aumentó significativamente (p < 0.05) el contenido de fibra dietética total y el contenido de polifenoles totales (1.52 mg AGE/g) fue mayor en los nuggets de pollo del T3. En la evaluación sensorial no hubo diferencia significativa, sin embargo, se reveló que el T2 obtuvo el mayor grado de aceptabilidad general. Los valores de TBARs (mg MDA/kg) de los nuggets de pollo, se incrementaron significativamente (p < 0.05) desde el día 0 hasta el día 20. Esto significa que el nivel de protección frente a la lipoperoxidación va disminuyendo, lo cual podría deberse a la producción de metabolitos volátiles en presencia de oxígeno durante el periodo de almacenamiento. El PCP es una fuente rica de fibra dietética total, además de ser un potencial antioxidante, mejoró el contenido de fibra dietética total sin afectar la aceptabilidad del producto, aumentó la estabilidad de los lípidos y mejoró...
Estimación de la biomasa de Lessonia trabeculata ‘aracanto palo’ (Lessoniaceae) dentro del ámbito submareal de la Reserva Nacional San Fernando
Authors:   , Cevallos Gil Bruno
Published: November 2024

Los bosques marinos son proveedores clave de servicios ecosistémicos a nivel mundial, con un reconocimiento creciente de su relevancia en el contexto de la adaptación y mitigación climática. A lo largo del sudeste del Pacífico, estos bosques sostienen intrincadas y productivas redes tróficas, sirviendo como sustento crucial para los sistemas costeros y como subsidio para hábitats más profundos. Este estudio tuvo como objetivo estimar la contribución de Lessonia trabeculata a las vías locales de carbono azul dentro del sector sur de la Reserva Nacional San Fernando (RNSF), la más extensa área costera protegida en Perú. Integrando teledetección, buceo científico y el conocimiento tradicional de buzos artesanales, realizamos una evaluación integral y estimaciones conservadoras del carbono capturado por estos bosques durante el invierno austral de 2021 utilizando los métodos de evaluación menos destructivos. Estimamos conservadoramente que ~1300 t C toneladas de carbono son capturadas como stock de biomasa por Lessonia trabeculata en el sector sur de la RNSF. Dicha asimilación de carbono en biomasa anualmente liberaría ~1300 t C m2 y-1 como detritos, de las cuales, una vez exportados potencialmente resulta en ~130 t C m2 y-1 secuestradas en sedimentos marinos profundos. La productividad detrital de L. trabeculata fue calculada por primera vez en el Perú, junto con el costo social y ambiental de emisiones equivalentes a la cantidad de carbono capturado (855.8k USD) y potencialmente removido por el stock de biomasa (85.7k USD). Además, presentamos una descripción general del estado de conservación de la población de kelp en el área protegida costera, junto con ecuaciones alométricas para estimar la biomasa en base a medidas biométricas fácilmente alcanzables bajo el agua. Este estudio representa la continuación de un esfuerzo pionero hacia la comprensión del carbono azul en los bosques marinos del Perú...
Evaluación de sensibilidad al desinfectante clorhexidina en Acinetobacter baumannii aislados de hospitales del Perú en 2022
Authors:   , Achachagua Barrera Renato Vladymir , De La Cruz Pareja Frank Robert
Published: November 2024

Objetivos. Analizar la susceptibilidad a la clorhexidina (CHX) en aislados de A. baumannii en diferentes hospitales. Materiales y métodos. Investigación descriptiva, tipo transversal. La población aislada fue de 49 estirpes de Acinetobacter baumannii con elevada tolerancia a carbapenems. Se evaluaron los niveles de sensibilidad a la clorhexidina mediante la MIC (Concentración Mínima Inhibitoria) por el procedimiento de dilución en Placas de Microtitulación. Se midieron los grados de susceptibilidad a antibacterianos por el método de difusión en disco. Finalmente, se estableció la presencia de genes resistentes a carbapenems por la técnica de Reacción en Cadena de la Polimerasa (PCR). Resultados. El rango de MIC de clorhexidina en los aislados del estudio fue de 8 a 32 mg/L, con una MIC50 y MIC90 de 32 mg/L. Encontramos que los aislados de A.baumannii presentaron una alta incidencia en cepas extremadamente resistentes (XDR) de 45/49 (91.8%), con niveles de resistencia elevados a cefotaxima, 48/49 (97.9%). El gen más frecuente reportado a la resistencia a carbapenemes fue blaOXA-24 en 33/49 (67.3%). Conclusiones. La tolerancia a la CHX de parte del A. baumannii en hospitales del Perú son variables en las cepas altamente resistentes a los antimicrobianos, manteniéndose sensibles a las soluciones de desinfectantes utilizados. Se necesitan más estudios de vigilancia para un mayor control.
Comunicación organizacional y gestión de contrataciones en una dirección del Ministerio de Cultura, (Lima-Perú) 2022
Authors:   , Rodriguez Geldres Ana Lucia Beatriz
Published: November 2024

En relación con el ámbito de estudio en una entidad del estado, se ha tenido a bien considerar el siguiente objetivo general: Analizar la relación entre la Comunicación Organizacional y la Gestión de Contrataciones en una Dirección del Ministerio de Cultura, (Lima-Perú) 2022. También, 102 colaboradores de las diferentes oficinas de la Dirección conformaron la muestra, el muestreo fue censal. Con respecto a la metodología, el enfoque considerado fue cuantitativo, el diseño no experimental y el tipo básico. Para el proceso de la recolección de datos se trabajó para la primera variable la prueba ECO: Escala de Comunicación Organizacional de Fernández Collao (2009) con 28 ítems. Asimismo, para la segunda variable gestión de contrataciones se creó un cuestionario con 12 ítems. Dichos instrumentos fueron sometidos al proceso de validez y confiablidad obteniendo resultados válidos. A continuación, después del procesamiento de datos, se encontró una relación directa y significativa con un coeficiente de correlación (p=0,525), nivel de criterio moderado entre la comunicación organizacional y la gestión de contrataciones en una Dirección del Ministerio de Cultura, (Lima-Perú) 2022.
Influencia de diferentes opacidades y la técnica de estratificación de resinas compuestas de nanotecnología en la longitud de onda e intensidad de fluorescencia: estudio in vitro
Authors:   , Portocarrero Flores Carla Daniela
Published: November 2024

Objetivo: Evaluar la influencia de la opacidad y de la técnica de estratificación en la fluorescencia de diferentes resinas compuestas. Materiales y métodos: Se evaluó in vitro 2 opacidades (Esmalte y Dentina) y la técnica de estratificación (Esmalte + Dentina) de las resinas compuestas: Filtek® Z350 y Palfique LX5. Para los grupos de opacidad única, se fabricaron discos de resina compuesta empleando una matriz preformada con un diámetro de 10 mm y un espesor de 0,5 mm y para los grupos de técnica estratificada fueron de 1 mm de espesor, utilizando 2 capas de 0,5 mm de cada opacidad (n = 5). Los especímenes se analizaron mediante el método de Espectroscopía Raman. Para el análisis de los datos se emplearon las pruebas de Kruskal-Wallis y U de Mann-Whitney. Resultados: Al examinar la intensidad de fluorescencia, no se detectaron diferencias estadísticamente significativas entre los pares: Técnica estratificada frente a Opacidad Esmalte en ambas marcas de resina compuesta, Filtek® Z350 y Palfique LX5® (p2 > 0,05). Asimismo, no se hallaron diferencias estadísticamente significativas en la longitud de onda entre los pares: Técnica estratificada frente a Opacidad Esmalte y Técnica estratificada frente a Opacidad Dentina para ambas resinas compuestas, Filtek® Z350 y Palfique LX5® (p2 > 0,05). Conclusiones: La intensidad de fluorescencia de la técnica estratifica es similar a la opacidad Esmalte para ambas resinas compuestas. De igual manera la longitud de onda de la técnica estratificada es similar a la opacidad Esmalte y opacidad Dentina para ambas marcas.
Improving Management of Oil and Gas Assets Through Derivatives
Authors: Stibolt Robert D.
Published: November 2024

Management

Summary

As markets for futures, swaps, and options have grown and matured in the oil and gas industry, the question of how companies should make use of such financial derivatives naturally arises. The simplest models of risk vs. return in modem finance theory are based on a world in which the costs of external and internal financing are the same and all risk is either systematic or can be diversified by shareholders. In this simplified world, derivatives must be viewed as purely speculative instruments that can add nothing to shareholder value. However, in the real world of financial distress, imperfect information, and misaligned management/shareholder risk attitudes, the use of these instruments can add significant value. This paper explores the sources of this potential for value creation, including a look at improving organizational alignment, information consistency, capital structure, and management of real assets.
Integrating Data for the Reservoir Engineer
Authors: Gochnour J. Robert
Published: November 2024

Computer Applications

Summary

More and more companies· are moving to multidisciplinary asset teams to work cooperatively on the same reservoir management and development studies. In the past, software developed specifically for the different disciplines or players had no mechanism for sharing the results effectively. With the enhancements in technology for collecting data, its quality and quantity have increased tremendously. The thrust now is removing data barriers between the different disciplines and proprietary systems, allowing data to be shared in a timely fashion to improve accuracy and productivity. At the same time, many companies desire to preserve previous investments in software, whether it was purchased or developed internally. A project data store has been developed that allows companies to use all reservoir, petroleum engineering, fluid, and geoscience data in a variety of applications, including their own favorite software, overcoming previous integration problems and leading to improvements in reservoir modeling, reservoir management, and risk reduction. Easy access to the bank of this information on global, corporate, and project levels will equalize technology at both large and small energy producers. Managing its access and use will drive software development in the near future.
The Genomic Evaluation of Space Travel and Research (GENESTAR) Manual for Biospecimen Collection, Biobanking and Omics Data Generation from Commercial Space Missions
Authors: Krishnavajhala Aparna , Gingras Marie-Claude , Urquieta Emmanuel , Chao Hsu , Bandaranaike Dilrukshi , Chen Yi , Bhamidipati Sravya , Korchina Viktoriya , Griffin S. Michelle , Masternak Michal , Moreno Hannah , Mohammed Javid , Murugan Mullai , Posey Jennifer , Wu Jimmy , Muzny Donna , Gibbs Richard , Doddapaneni Harsha vardhan
Published: November 2024

The surge in commercial and civilian spaceflight enables for the first time, systematic and longitudinal, large-scale biospecimen collection to understand prospective effects of space travel on human health. The Genomics and Space Medicine (Space Omics) project at BCM-HGSC involves a comprehensive biospecimen collection plan from commercial/private space flight participants (SFP). Biospecimens from multiple pre-launch (leading up to quarantine period) and post-return (the day of return, R + 0 onwards) time points are collected. The diverse array of biospecimen collections include venous blood, body swabs, saliva, stool, and urine samples and their derivatives. The manuscript addresses the critical gaps thus far in the biospecimen collection process such as informed consent process and a provision for subjects to obtain custom CLIA-WGS reports. We discuss here, the biospecimens collection, processing methodologies and nucleic acids’ suitability for Omics data generation, including successful generation of 16S rRNA data that have been presented as a ‘Genomic Evaluation of Space Travel and Research (GENESTAR)’ manual. Results from Axiom-2 mission where, a total of 339 biospecimens were collected using this manual, at two different sites, showed that 98% of the accessed blood samples and 91.6% of the non-blood samples passed the QC requirements for Omics assays, underscoring the reliability and effectiveness of the GENESTAR manual. Also for the for the first time, to support Space Omics studies, details of a data dictionary and a LIMS enabled biobank, are provided.
Exploring Salt Stress Tolerance in Horsegram (Macrotyloma uniflorum): Insights from Growth, Physiology and Biochemical Approaches
Authors: Singh Narayan , Maurya Vasudha , Sharma Ashutosh , Kumar Rahul
Published: November 2024

Soil salinity is one of the significant challenges affecting seed germination, growth, physiology, and crop productivity worldwide. Horsegram is known for its higher tolerance to stress conditions than other legumes and therefore is a potential pulse and fodder crop in salt-affected areas. During this study, 25 horsegram genotypes were screened under a controlled environment to identify salt-tolerant and sensitive genotypes based on the salt tolerance index and membership function value of 10-day-old seedlings. DH-22 and DH-29 were identified as salt-tolerant, while DH-11 and DH-12 were identified as salt-sensitive genotypes. These genotypes were further analyzed under 0, 50, 100, and 150 mM NaCl treatments to examine various growth, physiological, and biochemical parameters. The analysis revealed that the tolerant genotypes exhibited higher root and shoot length, dry and fresh weight, relative water content, chlorophyll and carotenoids content, free proline and phenolic content, and enhanced activity of antioxidant enzymes such as catalase, ascorbate peroxidase, glutathione reductase, superoxide dismutase, and guaiacol peroxidase. Further, lipid peroxidation, hydrogen peroxide content, and percent ion leakage decreased in the tolerant genotypes than in the sensitive genotypes. Additionally, the tolerant genotypes displayed less cell death and lower accumulation of H2O2 and superoxide ions in histochemical staining, which may play a vital role in cellular protection during salt stress tolerance.
Prevalence and clininco-pathological correlation of Sino- nasal malignancies in Sudan
Authors: Abdallah Ayat , Ahmed Sharfi , Ibrahim Ibrahim Gaffar , Ali Mujtaba A.
Published: November 2024

Background: Sinonasal malignancies are uncommon neoplasms with several histopathological subtypes. These malignancies have a poor prognosis, and because of the nonspecific nature of the symptoms, most patients are diagnosed late when the disease is already at an advanced stage. This is the first study to describe the prevalence and clinicopathological correlation of sinonasal malignancy in Sudan.
Objectives: This study aims to determine the prevalence and clinicopathological correlations of sinonasal malignancies among Sudanese patients, done in a cohort of patients in Khartoum state from September 2020 to September 2021.
Methods: This is a cross-sectional hospital-based study. All Ear, nose, and throat hospitals in Khartoum state, Sudan, were included. In the period from 01/09/2020 – 30/09/2021. Data were collected using structured interviews. Data were analyzed by statistical package for social sciences (SPSS).
Results: In Khartoum state, the study encompassed all patients diagnosed with sinonasal malignancies who willingly participated. Out of the consenting participants, 44 individuals were enrolled, with males constituting 61.4% of the cohort and females representing 38.6%. Noteworthy is the observation that 38.6% of the patients fell within the age range of 50-60 years old.
The estimated prevalence of sinonasal malignancies is 0.6 per 1000 individuals. Unilateral nasal obstruction emerged as the most frequent presentation (72.7%), followed by epistaxis in 56.8%. In terms of risk factors, 18.2% were identified as smokers, and 6.8% were woodworkers; however, a notable proportion (63.6%) did not exhibit any of the known risk factors.
Conclusion: The estimated prevalence of sinonasal malignancies is 0.6 per 1000 individuals. Nasal obstruction was identified as the most common presenting symptom, and decreased visual acuity emerged as the predominant ophthalmological symptom. Notably, there was a significant association between epistaxis and squamous cell carcinoma (SCC) in 15 patients, with a p-value of 0.005. Emphasizing the importance of early detection and timely treatment, these findings highlight the critical role they play in improving patient outcomes.
Potential Shared Neoantigens from Pan-cancer Transcript Isoforms
Authors: Techachakrit Jirapat , Malik Aijaz Ahmad , Pisitkun Trairak , Sriswa Sira
Published: November 2024

Background: Isoform switching in cancer is a prevalent phenomenon with significant implications for immunotherapy, as actionable neoantigens derived from these cancer-specific events would be applicable to broad categories of patients, reducing the necessity for personalized treatments.
Results: By integrating five large-scale transcriptomic datasets of cancer and normal tissues, we identified cancer-associated isoform switching events common to multiple cancer types, several of which involve genes with established mechanistic roles in oncogenesis. The presence of neoantigen-containing peptides derived from these transcripts was confirmed in broad cancer and normal tissue proteome datasets and the binding affinity of predicted neoantigens to the human leukocyte antigen (HLA) complex via molecular dynamic simulations.
Conclusion: The study presents strong evidence that isoform switching in cancer is a significant source of actionable neoantigens that have the capability to trigger an immune response. These findings suggest that isoform switching events could potentially be leveraged for broad immunotherapeutic strategies across various cancer types.
Assessing the Impact of Trauma Score, Mechanisms and Demographics on Chest Injury Outcomes
Authors: Sarbay İsmail , Öncü Kıvanç , Esme Nurullah Sait , Sarbay İbrahim
Published: November 2024

Aim
This study evaluated the effects of trauma mechanisms and age intervals on injury extent and prognosis in chest traumas to enhance trauma management strategies.
Background
Chest traumas are a major cause of morbidity and mortality globally, often resulting from high-energy impacts like motor vehicle accidents, falls, crushing injuries, and penetrating injuries. These can lead to various injuries, including lung contusions and rib fractures, requiring urgent medical or surgical intervention. The injury severity and mechanism, along with factors such as age and gender, influence clinical outcomes.
Methods
This was a retrospective study of 525 patients with thoracic trauma presenting to a secondary-care public hospital from May 2022 to May 2024. Demographic profiles, diagnoses, radiological findings, and surgical procedures were recorded and analyzed using Binary and Multinomial Logistic Regression and Chi-square tests.
Results
Among 525 patients, 158 were female, and 367 were male. The most common trauma etiologies were falls (58.7%) and traffic accidents (22.7%). Rib fractures were the most frequent injury (67.2%), with older patients and females at higher risk. Concomitant injuries were present in 28% of cases, mainly in traffic accidents. Intensive care was required in 12.4% of cases, especially after post-resuscitation, crush traumas, and polytrauma. The Chest Trauma Score (CTS) correlated with the hospitalization, requirement for intensive care, hemothorax, pneumothorax, and concomitant injuries.
Conclusion
The mechanism of injury and age significantly impact injury extent in chest traumas. Falls and traffic accidents increase the risk of rib fractures, while older patients are at higher risk for hemothorax and rib fractures. An increased trauma score is related to concomitant injuries and the requirement for intensive care. These findings emphasize the importance of factoring in both the type of trauma and the age in patient management to provide appropriate treatment and prevent complications.
Effect of Er:Yag Laser and Different Surface Treatment Methods on the Push out Bond Strength of Glass Fiber Post to Self Adhesive Resin Cement
Authors: Elalfy Nouran , Elbasty Reham
Published: November 2024

Purpose
to compare the bond strength of adhesive-based resin cement and glass fiber posts (GFP) at different root levels after exposure to Er:Yag laser irradiation compared to other conventional surface treatment procedures.
Methods
A total of 24 mandibular premolars were decoronated, root canal treatment was done, post spaces were prepared, and roots were mounted in acrylic resin blocks. Fiber posts were divided into four groups (n = 6) according to surface treatment methods: 1) silane only (control group), 2) Er:YAG laser 1.5 W + silane, 3) 30% hydrogen peroxide + silane, 4) sandblasting with 50 µm aluminum oxide particles + silane. GFP were cemented using self-adhesive resin cement. Scanning electron microscope images with 500x magnification were taken for all groups. Push-out test was performed using a universal testing machine.
Results
The difference between groups was statistically significant with laser group recorded the highest mean ± SD value of push out bond strength (5.668042 ± 1.16 MPa), followed by H2O2 group ,then the control group, meanwhile the lowest value was recorded with Sand-blasting group. The difference between the radicular regions was not statistically significant, with the middle region recorded the highest push out bond strength (4.746851 ± 0.73 MPa).
Conclusion
GFP surface treatment using an Er:yag laser is effective as it increases the retention to resin cement,while sandblasting decreases fiber post retention to resin cement. The hydrogen peroxide and the silane coupling agent give similar bond strength. The middle and apical regions of GFP have better retention to resin cement than the coronal one.