bluuebunny/crossref_metadata_2025 huggingface dataset:
Primary neonatal sacrococcygeal neuroblastoma masquerading as a teratoma: A case report
Authors: Edan Obay A , Jawhar Nazar MT
Published: August 2022

Background: Neonatal tumors comprise about 2% of all pediatric malignancies, with neuroblastoma having the highest incidence. Neuroblastoma involving the adrenal medulla and sympathetic ganglia is the most typical scenario in infancy, while the pelvic variant is rare. We report this case because of the unusual and rare presentation of neuroblastoma in a newborn baby mimicking sacrococcygeal teratoma.
Case Presentation: A newborn male baby presented with a firm sacral mass, about 5 x 7 cm, with normal overlying skin. MRI revealed an intrapelvic mass extending to the sacral region encasing the coccyx. After preparation, complete tumor excision was performed, and the diagnosis of neuroblastoma was confirmed by histological and immunohistochemical study.
Conclusion: Primary neonatal neuroblastoma presenting as a sacrococcygeal mass is a rare and atypical clinical finding of neuroblastoma. It is hard to diagnose this sort of tumor preoperatively unless the mass is subjected to histological and immunohistochemical analysis after tumor excision.
Factors promoting nursing leadership in health care settings: a theoretical perspective
Authors: Šabanovič Beatričė , Jakavonytė-Akstinienė Agnė
Published: August 2022

This article presents a theoretical study on the factors that promote nursing leadership in healthcare settings. Leadership in healthcare settings is significant because the success of an organisation depends to a large extent on the personal qualities of its leaders. Leadership is not only a managerial activity, but also a competency that can be important both in the management of the organisation and at all levels of the organisation.The aim of this paper is to review and present the factors that promote nursing leadership in healthcare settings. Methods – Systematic search of PubMed, Cochrane Library and Google Scholar. The systematic review included 14 articles on the topic. The results showed that leadership is associated with organisational success. The main factors for promoting nurses' leadership are: organizational leadership endorsement by managers, initiating change, organizing nurses around leadership issues, promoting communication, creating an environment conducive to leadership development, financial support and motivation, decision-making freedom, and creating opportunities to care for oneself and colleagues.
Climate Variation Assessment Based on Rainfall and Temperature in Ilorin Kwara State Nigeria
Authors:   Department of Agricultural and Environmental Engineering, Federal University of Technology, Akure, Nigeria, Olubanjo O
Published: August 2022

In recent times and across the globe, the concept of climate has gained much relevance because of its dynamic and complex nature and the significant influence it has on various aspects of the environment, including the increasing threat of global climate change. This study focuses on the assessment of climatic variation in Ilorin based on the variations in rainfall and temperature within the period 1980-2015. Time Series Analysis was used to determine the trend of rainfall and temperature within the period 1980-2015. The 5-Year Moving Average was used to smoothen the time series and to eliminate unwanted fluctuations. Linear Regression was used to estimate the value of variable Y (total rainfall or average minimum temperature), corresponding to a given value of variable X (time), while MAKESEN software was used to determine the temporal trend of rainfall indices within the study period. Furthermore, the study focused on the spatial variations of total rainfall and average minimum temperature in the study area. The result revealed that there is downward trend of 0.814 mm per year in the annual mean rainfall and also there is an upward trend of 0.029 per year in average annual minimum temperature and total annual maximum temperature has an upward trend of 0.01 mm per year. Thus, the rainfall is decreasing and temperature tends to increase. Key word: Climate variability, Rainfall, Temperature, Period, Temporal trend, Kwara state
Una mirada a la industria farmacéutica en Colombia
Authors: Salazar Hernández Rubén , Peralta Miranda Pabla
Published: August 2022

La industria farmacéutica Colombiana, ocupa uno de los renglones más importantes en la economía, sus ventas llegan anualmente a los 3 billones de pesos, y se espera un crecimiento al 2016 del 7%. Sin embargo, la industria enfrenta grandes retos, el más importante es el control de precios a los medicamentos, las políticas del Gobierno frente a los productos y su acceso por parte de la población, las fusiones y adquisiciones entre laboratorios y la entrada de productos biosimilares. Por tal razón, el mercado exige mejores prácticas empresariales, en términos no sólo curativos, sino también a nivel de prevención. El sector en Colombia se encuentra en un proceso de ajuste, con el fin de enfrentar de la mejor manera los retos de la industria interna e internacional; de allí se continúa buscando diversas alternativas en la oferta para los usuarios y contar así con una población mejor informada, en el uso racional de los medicamentos. La población colombiana cuenta con cobertura en salud (superior al 93%), situando el sistema de salud Colombiano en uno de los mejores de la región, con respecto a otros países de Latinoamérica.
Valoración económica de servicios ambientales en sistemas agroforestales en América Latina
Authors: Pardo Rozo Yelly Yamparli , Sanjinés Tudela Gimmy Nardó
Published: August 2022

Los sistemas agroforestales (SAF) otorgan valor económico a los predios rurales por cuanto optimizan la relación: insumo producto ambiente. La valoración de los servicios ambientales implícitos en los SAF, busca estimar los costos de oportunidad del uso de recursos y la contribución en el precio de las tierras, en la producción o en la utilidad. Entre los principales servicios ambientales se encuentran: almacenamiento de carbono, conservación de bosques y disponibilidad de agua. Para estimar los beneficios económicos la valoración ambiental (VEA) se apoya en la microeconomía y econometría para construir las curvas de oferta y demanda para luego calcular las medidas de bienestar económico tales como disponibilidad a pagar, excedente del consumidor y valoración compensada. Entre los métodos VEA de mayor aplicación se encuentran: valoración contingente, costo de viaje y precios hedónicos. Los estudios de valoración económica constituyen una línea base en la determinación de políticas ambientales.
Economía Solidaria: Modelo empresarial de desarrollo sustentable
Authors: Rubio Rodríguez Gustavo Adolfo , Pinto Guerra Gustavo
Published: August 2022

La revolución del conocimiento puesta al servicio del lucro ha desatado un ritmo acelerado de innovaciones que perjudican y someten los derechos del trabajo, y a la vez resultan nocivos para el desarrollo de las estructuras organizacionales, alterando, inclusive, el equilibrio social. Este documento inicialmente pretende brindar un acercamiento a la marcada diferencia que se presenta entre el neoliberalismo y la economía social, para lo cual se esgrimen sus posibilidades comparativas frente a los modelos tradicionales; asimismo, se expone la economía social y solidaria como componente determinante que logra llegar a afectar la dirección económica de la sociedad basado en su disposición funcional. Posteriormente, se presentan diferentes puntos de vista por parte de los autores, donde se critica y reflexiona acerca del sector solidario y la manera cómo repercute e infiere en el contexto económico. La forma como se caracteriza dicho sector, en este manuscrito, lo postula como un modelo alternativo de desarrollo económico y social.
RINOTRAQUEITIS INFECCIOSA BOVINA (RIB), UNA ENFERMEDAD DE POCO CONTROL EN COLOMBIA
Authors: Flechas Bernal Juan Diego , Bulla Castañeda Diana María , García Corredor Diego José , Jiménez Sánchez Jorge Alejandro , Cruz Estupiñan Sharon Elizabeth , Pulido Medellín Martin Orlando
Published: August 2022

Rinotraqueitis Infecciosa Bovina (RIB), es una enfermedad infectocontagiosa causada por el herpes virus bovino tipo 1 (HVB-1) perteneciente al género Varicellovirus. Su distribución es mundial, y representa una de las principales causas de infertilidad y aborto en los bovinos, además de una disminución en la producción, causando pérdidas económicas. La infección puede cursar de forma respiratoria, conjuntival, vulvovaginal, con abortos endémicos y de forma septicémica. Su transmisión puede ser vertical y horizontal, además de tener la capacidad de permanecer en estado de latencia para luego tener periodos de reactivación y re-excreción. Las manifestaciones clínicas y curso de la enfermedad precisa del sitio de la infección, la edad y el estado inmunológico del portador. El diagnóstico presuntivo de RIB puede darse en base a los signos clínicos, patalógicos y epidemiológicos, pero para realizar un diagnóstico definitivo se requiere de pruebas de laboratorio como aislamiento viral, inmunoperoxidasa (IP), inmunofluorescencia (IF), seroneutralización, ensayo por inmunoabsorción ligado a enzimas (ELISA) y reacción en cadena de la polimerasa (PCR). La profilaxis se logra por medio de la vacunación y con el sacrificio de animales seropositivos. Los impactos sanitarios y económicos de la RIB hacen necesario la implementación y refuerzo de programas nacionales de control y capacitaciones sanitarias para los ganaderos, además de una eliminación progresiva de animales seropositivos. Es por esto que el objetivo fue realizar una revisión de literatura de RIB que permita abordar aspectos sanitarios y epidemiológicos de la misma.
RESULTADOS DE APRENDIZAJE PARA EL PROGRAMA DE MEDICINA VETERINARIA Y ZOOTECNIA DE LA UNIVERSIDAD DE LA AMAZONÍA
Authors: Estrada Cely Gloria Elena
Published: August 2022

La presente investigación tuvo como objetivo central proponer Resultados de Aprendizaje que respondan a las particularidades del programa de Medicina Veterinaria y Zootecnia de la Universidad de la Amazonía; y fue desarrollada a partir del análisis de la normatividad vigente del orden nacional e institucional, así como de la información reportada por autores relevantes en el campo. Para la proyección de los Resultados de Aprendizaje fueron revisados cada uno de los componentes establecidos en el Proyecto Educativo del Programa, con particular atención al perfil del egresado y las competencias. Como uno de los principales resultados del proceso se pudo comprobar la correcta articulación entre las competencias y el perfil del egresado del programa y la necesaria identificación de mecanismos específicos para el establecimiento de los Resultado de Aprendizaje, que deben ser conocidos y concertados por el colectivo docente, con el fin de lograr su posterior ajuste incorporación en cada uno de los programas de curso de los espacios académicos.
An Efficient ICI Cancellation Scheme to Mitigate the Effect of ICI on OFDM Systems.
Authors: Kumar Arunabh , Pawar Shailendra Singh , Singh Kundan Kumar
Published: August 2022

Inter-carrier interference (ICI) emerges in orthogonal frequency division multiplexing (OFDM) systems used for mobile communication as a consequence of the Doppler Effect's loss of orthogonality among subcarriers. Inter-Carrier Interference (ICI), which affects every subcarrier, drastically lowers performance. The performance of OFDM systems may be enhanced using a variety of ICI mitigation strategies. Comparable subcarrier frequency offsets are guaranteed by the premise that the OFDM transmission bandwidth is suitably modest in the majority of ICI mitigation strategies, on the other hand. The frequency offsets between each subcarrier might change, hence a wideband OFDM system in a situation with high mobility is investigated. Furthermore, the suggested ICI cancellation approach, Total ICI Cancellation, does not reduce bandwidth efficiency or transmission rate. As an example, the Total ICI Cancellation approach uses the ICI matrix's orthogonality to provide perfect ICI cancellation and a significant boost in BER at a linearly increasing cost. The suggested technique, which matches the BER performance of a wideband OFDM system without ICI, offers the best BER performance possible in the presence of frequency offset and time shifts in the channel, according to simulation findings in the AWGN and multipath fading channels.
THE EFFECT of ETHANOLIC EXTRACT of Justicia secunda (BLOOD ROOT) on the VAGINAL OPENING and OESTROUS CYCLE of FEMALE WISTAR RATS
Authors: Okpara P. E , Dakuro Victor Progress , Reuben E , Ajie P.C , Joseph F.C.
Published: August 2022

Purpose: This study investigates the effect of the ethanolic extract of Justicia secunda (Blood root) on the vaginal opening and oestrous cycle of female wistar rats.

Methodology: Thirty (30) female wistar rats of 18-33g average weight was used. They were divided into six groups of five animals each. Group A received distilled water while animals in group B-F received 250, 300, 350, 400 and 450mg/body weight (kg) respectively of the ethanolic extract of the plant. Monitoring of the onset and completion of vaginal opening was done and the estrous cycle was also monitored throughout 3 weeks of extract administration. Early onset of vagina opening was seen in the treated group compared to the control. The oestrous cycle showed irregularities when compared to the control data were expressed as means ± standard error of mean and analyzed by analysis of variance (ANOVA).

Findings: This result showed that the plant extract causes an irregular oestrous cycle and precocious pubertal onset in female wistar rats.

Unique contribution to theory, practice and policy: The plant extract of Justicia secunda likely to induce precocious puberty in young female wistar rats and irregular cyclicity in the oestrous cycle. This implies that Justicia secunda is likely to have contraceptive properties.
Effect Of Tree Wrap On The Incidence Of Frost Crack In Norway Maple
Authors: Hart John H. , Dennis Gurdon K.
Published: August 2022

During the winters of 1970-1971 and 1971-1972, frost cracks developed on Norway maple cv. ‘Emerald Queen’ planted in a Michigan nursery. Trees in low areas or on poorly drained soils were more frequently injured than those planted on better drained soils. Wrapping trees in November, 1971, with bands of Kraft paper did not reduce the incidence of frost cracks during the 1971-1972 winter.
Current Urban Forestry Policy Of U.S. Governments
Authors: Rubens James M.
Published: August 2022

US urban forests are financed and managed primarily by local, state and federal governments. More correctly, these forests are actually underfinanced and mismanaged. Improving the condition of our urban forests may depend upon an increase of planting and maintenance expenditures by an estimated $100 to $150 million annually, and by increasing the cost-effectiveness of the approximate $300 million now spent. Improvements will also result only from retaining more skilled practitioners and managers, or from upgrading the skills of existing personnel. Governments must also be restructured so that innovation and efficiency are encouraged and rewarded.

Urban forest policy should be directed to the needs as expressed by urban forest managers, rather than to the somewhat inaccurate preconceptions of policymakers from traditional woodland forestry backgrounds. In depth communication among all levels of government and private practitioners will be the first step toward significant improvement of the condition of urban forests.
Development and Characterization of Bioactive Edible Films Based on Semi-Refined Kappa Carrageenan Incorporated with Honey and Kaempferia galanga L. Essential Oil
Authors: Praseptiangga Danar , Ferichani Indira Puspa , Mufida Nuha
Published: August 2022

This paper emphasized the innovation of commercial semi-refined kappa carrageenan-based (SRKC) films incorporated with Ceiba pentandra honey and Kaempferia galanga L. essential oil to develop bioactive edible film. The influence of honey and essential oil concentrations on the mechanical, physical, moisture barrier, and sensory properties has been investigated. It was found that the thickness, solubility, elongation at break of the edible film with honey addition (50, 100, 150, and 200 % w/w carrageenan) were increased (p < 0.05), whereas the tensile strength was decreased (p < 0.05), and there was no significant difference in the water vapor transmission rate of all the films (p > 0.05). In the next stage, increment of essential oil concentration (0.25, 0.5, and 1 % w/v) in SRKC film with 200 % honey increased the thickness, but reduced the solubility, tensile strength, and elongation at break, and had no significant influence on the water vapor transmission rate (p > 0.05). The edible film incorporated with 200 % honey and 0.25 % Kaempferia galanga L. essential oil demonstrated a significant effect on the sensory evaluation test on aroma, taste, and overall attributes (p < 0.05). Furthermore, the edible films also encompassed many bioactive compounds. In summary, the present research findings confirmed the potentials of SRKC edible film enriched with 200 % honey and 0.25 % Kaempferia galanga L. essential oil as a novel edible food packaging with enhanced bioactive characteristics.

HIGHLIGHTS

Semi-refined kappa carrageenan (SRKC) is a good film-forming material

Kaempferia galanga L. essential oil is known for its bioactive components

Honey and the essential oil are added to develop bioactive edible film

GRAPHICAL ABSTRACT
Nutrition, Phytochemicals, Antioxidants, and Cytotoxicity of Sweet Potato Leaf Tea
Authors: Manasathien Jinnawat , Khanema Piyanut
Published: August 2022

Due to their nutritional loadings and the value-added aspect, fresh leaves of 5 sweet potato varieties were screened for phytochemicals and used to produce herbal teas. The teas were observed for their proximate components, antioxidants, antioxidative activity, cytotoxicity and colour parameters under brewing at 60, 80 and 100 ºC for 3, 5, 7 and 10 min. Tannins, phenolic compounds, saponins, flavonoids, phytosterols and alkaloids were contained in almost all varieties, whereas cardiac glycosides were dominant only in WP (white skin and purple flesh root) fresh leaves. Results for proximate components found that WP tea was prominent with the enrichment of crude fat (16.71 g/100 g of tea), chlorophyll b (29.41 mg/100 g of tea), cyanidin-3-glucoside (83.59 mg/100 g of tea), pelargonidin-3-glucoside (72.30 mg/100 g of tea) and tannins (1,994.81 mg TAE/100 g of tea). This was followed by RO (red skin and orange flesh root) with more protein content (0.13 g/100 g of tea). In the antioxidant test, OO (orange skin and orange flesh root) had the highest total phenolic content (1,260.92 mg GAE/100 g of tea) and offered the greatest potential of antioxidative activity (12,218.44 mg GAE/100 g of tea). No teas showed any signs of cytotoxicity (LC50 > 1,000 µg/mL). Almost all the tea was green in colour, but a yellow colour indicating lutein or its influence was also detected. In conclusion, WP, RO and OO tea were predominantly served as a low-price healthy beverage with high nutrient levels and antioxidative properties.

HIGHLIGHTS

Edible sweet potato leaves can be served as a low-cost healthy tea beverage

Sweet potato leaf teas enrich of medicinal bioactivities such as cyanidin-3-glucoside, pelargonidin-3-glucoside, tannins, and total phenolic compounds

Sweet potato leaf teas have strong antioxidative activity

GRAPHICAL ABSTRACT
Bank Preference Factors of Retaıl Customers
Authors: İNCİRKUŞ Abdullah , ÜNDEY Nur
Published: August 2022

In this first quarter of the 21st century, the fact that digital technology applications are becoming more involved in people's lives has caused more changes in the banking ecosystem than ever before. This change has directed banking institutions to use the possibilities of digital technology channels as much as possible to deliver and offer their services to their customers. Formerly, a bank customer had to go to a branch of that bank in order to receive services from the bank, but now, customers can make the banking transactions they need using the various service channels offered by the bank without having to go to a physical bank branch. As a result of all these developments, it is believed that the technological and digital service channels that currently used by banks have become an important factor in determining the bank where their customers will work / receive services.

This new banking ecosystem in the bank individual customers of our study today's preference for measuring the factors in order to develop an appropriate scale developments in the field of banking, the online survey, the data obtained from the Explanatory Factor Analysis (AFA) and Confirmatory Factor Analysis (DFA) are reviewed. 1,163 participants who are individual bank customers participated in the survey conducted throughout Turkey. Participants were asked 32 questionnaires to find out their bank preferences. With the data obtained, AFA analysis was performed in SPSS 26 program and DFA analysis was performed in AMOS 24 program.

The scale developed as a result of both analyzes is appropriate and the factors that affect the bank preference of individual customers; It has been concluded that "Caring for Customer Satisfaction, Offering Digital Services, Offering Extra Advantages, Being Strong and Having Domestic Capital, Providing Quality Service at Low Cost, Providing High Profit, Having an Accessible Service Network".
Diseño sísmico de marcos especiales a momento compuestos (C-SMF) con columnas tubulares cuadradas de acero rellenas de hormigón (CFT) y vigas de perfil W aplicando la norma chilena NCH 433
Authors: Añazco A. , Berrú J. , Solano C. , Espinoza F.
Published: August 2022

En el presente trabajo de investigación se realizó el diseño sísmico de marcos especiales a momento compuestos (C-SMF). Para llevar a cabo este planteamiento como primer punto se realizó el prediseño de los elementos utilizando el método de la fuerza lateral equivalente (Bruneau, et al., 2011) para este sistema estructural. Luego de eso se realizó el diseño de varias configuraciones de edificios prototipo en 2D de 3, 6, 8, 12 y 16 pisos de altura tomados de una planta típica, ubicados en diferente zonificación sísmica y tipo de suelo, aplicando la norma chilena NCh 433 (INN, 1996). Se utilizó el software SAP2000 versión 19.1.1 para llevar a cabo todo el trabajo de investigación.

Un total de 18 diseños se llevaron a cabo. Se logró cumplir con las especificaciones para elementos del AISC 360 (ANSI, 2016), con las limitaciones sísmicas de la NCh 433 (INN, 1996) y el diseño por capacidad acorde al AISC 341 (ANSI, 2016) donde la disipación de energía se concentra en los extremos de las vigas y en la base de las columnas del primer entrepiso haciendo énfasis en la verificación del criterio sísmico de columna fuerte-viga débil para C-SMF. La solicitación en los elementos fue mucho menor que su resistencia quedando los diseños controlados completamente por el límite de deformaciones impuesto por la NCh 433 (INN, 1996).
Estudio del estado del hormigón en puentes de 50 años en la región subtropical de Bolivia
Authors: Ibarra Villanueva Rolando
Published: August 2022

La deterioración del hormigón es un factor común en estructuras que se encuentran en ambientes agresivos y están por encima de su vida útil, como es el caso de los puentes antiguos que, adicionalmente, tienen que soportar cargas superiores de las cuales fueron proyectados. En este sentido, el objetivo del presente artículo consiste en analizar el estado del hormigón en puentes de más de 50 años en la región subtropical de Chapare – Bolivia, caracterizada por una elevada humedad y constantes lluvias durante todo el año.

La metodología del estudio consistió en la evaluación de 6 puentes de esta región mediante inspecciones visuales juntamente con ensayos de campo y laboratorio. Se aplicaron ensayos no destructivos como esclerometría, profundidad de carbonatación, aspersión de nitrato de plata; y ensayos destructivos como la extracción de núcleos.

Los resultados muestran que todos los puentes son afectados negativamente por la humedad que provoca el crecimiento de musgos y vegetación, además facilita la difusión del dióxido de carbono en el hormigón (CO2) permitiendo el desarrollo de carbonatación en todos los casos, proceso químico que ataca lenta y progresivamente hacia adentro del hormigón hasta llegar al acero causando corrosión. Los resultados del esclerómetro dieron un hormigón de resistencia superficial regular, 200 a 300 kg/cm2, lo cual fue ratificado con la extracción de núcleos; no obstante, por las características de estas estructuras, la resistencia debería ser mayor.

El deterioro y envejecimiento del hormigón son características relacionadas a la naturaleza de los materiales; sin embargo, la elevada humedad y la falta de programas de inspección y mantenimiento facilita el desarrollo de ciertas manifestaciones patológicas que comprometen la funcionalidad y seguridad de estas estructuras.
Control fitosanitario en agroecosistemas de la caña de azúcar
Authors: Perez Iglesias Hipolito Israel
Published: August 2022

Se presentan los resultados obtenidos en la vigilancia fitosanitaria de las plantaciones comerciales de caña de azúcar en Cuba, con la implementación de los Servicios Científico Técnicos SERVAS (Servicio de Variedades y Semillas) y SEFIT (Servicio Fitosanitario) en un área de 600 000 ha de cultivo. Además la significancia del Programa de Producción de Semilla para las plantaciones comerciales y del Programa de lucha Biológica como complemento en la disminución de enfermedades e insectos plagas peligrosos capaces de producir severas perdidas económicas y los resultados alcanzados con la implementación del (SEFIT) en la disminución de enfermedades e insectos plagas a nivel nacional.  El manejo agronómico de las áreas ocupadas por las principales variedades de importancia comercial, junto a la introducción acelerada de nuevas obtenciones han permitido mejorar significativamente el cuadro fitosanitario de la caña de azúcar, bajo las condiciones edafoclimáticas y de manejo del cultivo en el país.
Metodología para la estimación de caudales mínimos de una cuenca hidrográfica con escasa información hidrometeorológica
Authors: Sánchez Mendieta Carlos Eugenio , Espinoza Correa Jesus , Vera Dominguez Francisco , Luna Romero Angel , Bustamante Roque Ana , Cardenas Pucha Jaime , Lucero Caiminagua William
Published: August 2022

El presente estudio se basa en la obtención del caudal mínimo en la cuenca del Rio Luis del Cantón Portovelo, Provincia de El Oro (Ecuador), en donde el objetivo principal es elaborar una metodología de evaluación hídrica de una cuenca con escasa información hidrológica mediante la comparación de una fuente hídrica homologas para la obtención de caudal mínimo.  Los métodos empleados son el balance hídrico y el método de la Curva Duración General, donde el primer método calcula el caudal mínimo en función de la precipitación y la temperatura, dados por la estación meteorológica M180 la cual nos da el escurrimiento superficial y además aforos obtenidos en la cuenca del rio Luis para encontrar el escurrimiento basal resultando la sumatoria entre ambas un caudal mínimo de 2.847 m³/s. El segundo método está en función de los caudales mínimos mensuales de una estación cercana a la cuenca de estudio, siendo esta la estación H587 Pindo AJ Amarillo en la cual se realizó la Curva de Duración General, aquí se determinó el caudal mínimo para una probabilidad de excedencia del 70%, en base a este resultado se realizó una relación matemática de áreas entre la cuenca de referencia y la cuenca a estudio y se obtuvo un caudal mínimo de 2.448 m³/s correspondiente al Rio Luis,  dando una diferencia de resultados entre ambos métodos de 14.12 %.De acuerdo a ambos métodos, los resultandos convergen por lo tanto son positivos ya que el porcentaje de variación de resultados es aceptable, aquí radica la importancia de tener aforos en las cuencas hidrográficas del ecuador, debido a que el balance hídrico se apoya de un aforo para determinar el escurrimiento basal que es el que esta permanente en épocas de estiaje.
Confiabilidad de un método para la determinación de CO2 por cromatografía de gases
Authors: Romero Bonilla Hugo Italo , Acaro Espinoza Jhonatan Joseph , Camacho Vásquez Andrea Geomara , Castillo Sánchez Andrés Enrique , Vega Quezada Cristhian Antonio , Gadvay Yambay Katty , Dávila Dávila Kerly Elizabeth
Published: August 2022

El objetivo del presente trabajo de investigación consistió en determinar la confiabilidad de un método de cromatografía de gases para la determinación de CO2 presente en el biogás producto de la digestión anaerobia de residuos agroindustriales. Para medir la concentración del gas se utilizó un cromatógrafo de gases Fuli Gas Chromatograph 9790 II, el cual contó con detector de ionización de llama (FID) y una columna capilar (Supel-Q PLOT 30 m X 0,32 mm X40 um). Se usó hidrógeno como gas transportador, el horno estuvo a una temperatura de 250 ◦ C, el inyector a 250 ◦  C y el detector de ionización de llama a 350 ◦C. Se construyó una curva de calibración a partir de un patrón de CO2 como estándar de referencia. Todas las lecturas se hicieron por duplicado. Para realizar las diluciones del analito (CO2) se utilizó una bolsa de propileno, y aire comprimido como disolvente. Para determinar la confiabilidad de un método para la cuantificación de  CO2 se determinó la linealidad, precisión, límite de detección y límite de cuantificación. La linealidad del método fue demostrada a partir del coeficiente de proporcionalidad de 0,9997. El coeficiente de variación (CV) tuvo un valor de 1,72%,  lo cual indica que la precisión del método es aceptable. Por su parte el límite de detección y límite de cuantificación corresponden a valores de 5,16 y 1,13 ppm respectivamente.
Estudio químico del aceite esencial de las hojas de pimenta racemosa (Mill) JW. Moore
Authors: Bustamante Pesantes Katherine Elizabeth
Published: August 2022

Introducción: Myrtaceae, son una familia de árboles o arbustos perennifolios, ricos en aceites esenciales, perteneciente con alrededor de 130 géneros y unas 2.900 especies de regiones tropicales y subtropicales. Dentro de esta familia se encuentra Pimenta racemosa (Mill) JW Moore planta introducida en el ecosistema costa del Ecuador, con pocos estudios sobre su composición química.Objetivos: Extraer y caracterizar el aceite esencial de las hojas de Pimenta racemosa (Mill) JW Moore, que crece en Ecuador.Materiales y Métodos: La recolección se realizó de árboles cultivados en el Jardín Botánico de Guayaquil; la identificación se realizó en el Departamento de Botánica de la Facultad de Ciencias Naturales de la Universidad de Guayaquil. El aceite esencial se extrajo por hidrodestilación, empleando un equipo Clevenguer de 1 litro de capacidad, por tres veces, calculándose el rendimiento. Al aceite esencial se le determinaron las características físico-químicas: índice de refracción, densidad, residuo de evaporación y solubilidad en alcohol a diferentes porcentajes. El aceite esencial se separó por columna cromatográfica, empleando sílica gel desactivada con 10% de agua y éter de petróleo y metanol como disolventes de separación. Las fracciones obtenidas y el aceite esencial fueron analizados por el sistema acoplado CG-EM con las siguientes condiciones de análisis: Equipo Argilent, columna Ultra 2 de 12 m x 0,20 mm x 0,33 µm, temperatura inicial: 60° C por 3 minutos incrementando 10° C/ min hasta 300° C por 5 min. Tiempo de corrida: 32 min. Espectrómetro de masas operado a 70 eV en modo full scan desde 50 hasta 600 unidades de masa. Temperatura de la fuente 230° C, temperatura del cuadrupolo 150° C. Temperatura del inyector: 280° C, volumen de inyección 2 µL con gas portador helio a 1 mL/min.Resultados y Discusión: El rendimiento obtenido para el aceite esencial fue de 1,4 %. Se asignaron estructuras, a un total de 28 componentes del aceite esencial. El Eugenol y el Estragol resultaron ser los componentes mayoritarios del aceite esencial, lo cual se corresponde con lo informado en la literatura.Conclusiones: Se informa la composición química del aceite esencial de Pimenta racemosa (Mill) JW Moore, que crece en Ecuador.
Onde está o Outro nos Estudos Organizacionais e da Administração?
Authors: López Cabana Rocío del Pilar , Ichikawa Elisa Yoshie
Published: August 2022

O objetivo deste ensaio teórico é trazer uma reflexão sobre o tratamento do Outro no transcurso dos Estudos Organizacionais e da Administração. Destarte, tentamos instigar o aprofundamento na temática do Outro, assim como de sua problematização. Para tanto, partindo de uma perspectiva merleu-pontyana discutimos o problema da existência do Outro, para logo discorrer sobre o tratamento dado ao Outro nos Estudos Organizacionais e da Administração. No percurso destes Estudos, na sua maior parte, privilegiou-se a herança das filosofias ocidentais, que geralmente possuem no seu âmago um solipsismo sem saída em que o Outro é reduzido ao Mesmo. Desta forma é necessário quebrar essas correntes esmagadoras do Outro para poder falar não de processos de constituição, de definição do Outro, mas dos entrelaçamentos do Mesmo com o(s) Outro(s), que criam o social e também as organizações e que se manifestam em experiências vividas, sentidas e percebidas.
The role of apparent diffusion coefficient (ADC) in the evaluation of lymph node status in patients with locally advanced cervical cancer: our experience and a review
Authors: Gui Benedetta , Russo Luca , Minordi Laura , Miccò Maura , Persiani Salvatore , Avesani Giacomo , Rufini Vittoria , Fuoco Valentina , Autorino Rosa , Ferrandina Gabriella , Scambia Giovanni , Manfredi Riccardo
Published: August 2022

Introduction

To evaluate the role of apparent diffusion coefficient (ADC) value measurement in the diagnosis of meta­static lymph nodes (LNs) in patients with locally advanced cervical cancer (LACC) and to present a systematic review of the literature.

Material and methods

Magnetic resonance imaging (MRI) exams of patients with LACC were retrospectively eva­luated. Mean ADC, relative ADC (rADC), and correct ADC (cADC) values of enlarged LNs were measured and compared between positron emission tomography (PET)-positive and PET-negative LNs. Comparisons were made using the Mann-Whitney U-test and Student’s t-test. ROC curves were generated for each parameter to identify the optimal cut-off value for differentiation of the LNs. A systematic search in the literature was performed, exploring several databases, including PubMed, Scopus, the Cochrane library, and Embase.

Results

A total of 105 LNs in 34 patients were analysed. The median ADC value of PET-positive LNs (0.907 × 10-3 mm2/s [0.780-1.080]) was lower than that in PET-negative LNs (1.275 × 10-3 mm2/s [1.063-1.525]) (p < 0.05). rADC and cADC values were lower in PET-positive LNs (rADC: 0.120 × 10-3 mm2/s [–0.060-0.270]; cADC: 1.130 [0.980-1.420]) than in PET-negative LNs (rADC: 0.435 × 10-3 mm2/s [0.225-0.673]; cADC: 1.615 [1.210-1.993]) LNs (p < 0.05). ADC showed the highest area under the curve (AUC 0.808).

Conclusions

Mean ADC, rADC, and cADC were significantly lower in the PET-positive group than in the PET-negative group. The ADC cut-off value of 1.149 × 10-3 mm2/s showed the highest sensitivity. These results confirm the usefulness of ADC in differentiating metastatic from non-metastatic LNs in LACC.
Impacts of a workplace-based weight-control intervention on objective and perceived physical activity among a subgroup of workers
Authors: Tabak Rachel , Colvin Ryan , Strickland Jaime , Dale Ann Marie , Kepper Maura , Ruggeri Tara , Evanoff Bradley
Published: August 2022

Physical activity (PA) has many benefits; however, groups facing barriers to health promoting behaviors are less likely to be physically active.

The current study employed objective (accelerometry) and perceived (International Physical Activity Questionnaire, IPAQ) measures of PA among a subset of participants from the “Working for You” study, which tests a multi-level (work group and individual), workplace intervention targeted at workers in low-wage positions. Linear mixed and hierarchical logistic regression models were used to determine the intervention’s impact on moderate- to vigorous PA (MVPA) and achieving the PA Guideline for Americans (≥150 minutes MVPA/week), respectively from baseline to 6- and 24-months, relative to a control group. Correlations (Spearman Rho) between perceived and objective PA were assessed.

One-hundred forty workers (69 control, 71 intervention) participated in the sub-study, of these, 131 (94%) had valid data at baseline, 88 (63%) at 6-months, and 77 (55%) at 24-months. Changes in MVPA were not significantly different among intervention relative to control participants assessed by accelerometer or IPAQ at 6- or 24-months follow-up. The percent achieving the PA Guideline for Americans did not vary by treatment group by any measure at any time point (e.g., baseline accelerometry: [control: n=37 (57%); intervention: n=35 (53%)]). The study identified limited agreement (correlation range: 0.04 to 0.42, all p>.05) between perceived and objective measures.

We cannot conclude the intervention improved PA among a subset of participants wearing accelerometers. Though agreement between objective and perceived MVPA was low, similar conclusions regarding intervention effectiveness would have been drawn with either method.

Trial registration: ClinicalTrials.gov: NCT02934113
Illegal actions of convicts against correctional officers: causes, conditions and prevention
Authors: Кутаков Н. Н.
Published: August 2022

В статье проводится комплексный анализ детерминант совершения противоправных действий осужденными в отношении сотрудников исправительных учреждений. Предметом статьи выступили данные ведомственной статистики, сведения о противоправных действиях, совершенных в отношении сотрудников исправительных учреждений за период с 2017 по 2022 год, научные работы по теме исследования. Целью исследования является определение эффективных мер профилактики противоправных действий в отношении сотрудников исправительных учреждений, основанных на объективном и всестороннем анализе причин и условий их совершения. В работе использовались статистический метод, анализ, синтез, индукция, обобщение. По результатам исследования сделан вывод о том, что профилактика противоправных действий в отношении сотрудников исправительных учреждений может быть результативной только при системном подходе к ее осуществлению. При этом наиболее важными ее направлениями выступают решение задач по комплектованию исправительных учреждений, подготовка сотрудников к противодействию конфликтным ситуациям с осужденными, а также повышение эффективности взаимодействия отделов и служб исправительных учреждений в сфере обеспечения личной безопасности их сотрудников.

The article provides a comprehensive analysis of the determinants of the commission of unlawful acts by convicts against employees of correctional institutions. The subject of the article was the data of departmental statistics, information on illegal actions committed against employees of the correctional institution for the period from 2017 to 2022, scientific works on the topic of the study. The purpose of the study is to determine effective measures to prevent illegal actions against employees of correctional institutions, based on an objective and comprehensive analysis of the causes and conditions for their commission. The author used the statistical method, analysis, synthesis, induction, generalization. Based on the results of the study, it was concluded that the prevention of illegal actions against employees of correctional institutions can be effective only with a systematic approach to its implementation. At the same time, its most important areas solve the tasks of recruiting personnel for correctional institutions, preparing employees to counteract conflict situations with convicts, as well as increasing the efficiency of interaction between departments and services of correctional institutions in the field of ensuring the personal safety of their employees.
PENGARUH PENDIDIKAN DAN PELATIHAN TERHADAP KINERJA KARYAWAN PADA PT. KAWASAN INDUSTRI MODERN (PERSERO) MEDAN
Authors: Sinaga Kepler , Sitinjak Putra Axido
Published: August 2022

This study aims to determine the magnitude of the effect of education and training on employee performance at PT. Modern Industrial Area (PERSERO) Medan. The research approach used is a quantitative approach with causal associative methods. The population in this study were all employees of PT.Kawasan Industri Medan who had attended education and training, totaling 95 people. The sampling technique used purposive sampling using the Slovin formula, therefore the number of samples taken was 49 people.The results of the study indicate that: (1) There is a positive and significant influence on the education variable (X1) on the performance of employees (Y) of PT. Medan Industrial Estate. This can be seen from the test results obtained a significant value of 0.000 <0.05 or t count 2.441 > from t table 1.679 (α = 0.05/2, n-k-1). (2) There is a positive and significant effect on the training variable (X2) on the performance of employees (Y) of PT. Medan Industrial Estate. This can be seen from the test results obtained a significant value of 0.000 <0.05 or t count 4.267 > from t table 1.679 (α = 0.05/2, n-k-1). (3) There is a simultaneous positive and significant effect on the variables of education (X1) and training (X2) on the performance of employees (Y) of PT. Medan Industrial Estate. This can be seen from the test results obtained significant values ​​X1 and X2 0.000 <0.05 and f arithmetic value 5.552 > from f table 1.679 (α = k, n-k). 3.09. So for that, it is recommended to PT. Medan Industrial Estate to continue to improve education and training for employees so that employee performance can also increase.
PENGARUH STRATEGI PEMASARAN TERHADAP PENINGKATAN VOLUME PENJUALAN LAHAN DI PT. KAWASAN INDUSTRI MODERN (PERSERO) MEDAN
Authors: Sianturi Charles , Simanjuntak Julia Mintasari
Published: August 2022

This study aims to determine the effect of marketing strategies, namely pricing strategies and promotional costs carried out by PT. Kawasan Industri Modern  (Persero) to increase the volume of land sales. The method used is a quantitative method. This study uses secondary data types and the data analysis used is multiple regression data analysis, partial regression analysis and equipped with classical assumption test. The results of the regression analysis show that partially the pricing strategy has a positive and significant effect on increasing the volume of land sales. Simultaneous or multiple regression testing of pricing and promotion strategies obtained constant values ​​and positive regression coefficients. And the value of R Square shows 0.75.3 or 75.3% which means that the marketing strategy carried out by PT. Kawasan Industri Modern (Persero) can be explained by the variable pricing strategy and promotion strategy while the remaining 24.7% is influenced by other factors not examined in this study. From the results of this study, it can be concluded that partially price and promotion have a positive and significant effect on increasing the volume of land sales and simultaneously price and promotion have a positive and significant effect on increasing land sales volume. Thus it can be suggested that PT. Kawasan Industri Modern (Persero) continues to carry out pricing strategies and also promotional costs that have a good impact on increasing land sales at PT. Kawasan Industri Modern (Persero).
Quantifying the “infodemic”: People turned to trustworthy news outlets during the 2020 coronavirus pandemic
Authors: Altay Sacha , Kleis Nielsen Rasmus , Fletcher Richard
Published: August 2022

How did the 2020 coronavirus pandemic affect people's online news consumption? To understand this, we present a comparative analysis of data on an estimated 905B desktop and mobile visits to news outlets, and 54B Facebook engagements, generated by news outlets in the US, UK, France, and Germany between 2017 and 2021. We find that in 2020 online news consumption increased. Trustworthy news outlets benefited the most from the increase in web traffic. In the UK trustworthy news outlets also benefited the most from the increase in Facebook engagement, but in other countries both trustworthy and untrustworthy news outlets benefited from the increase in Facebook engagement. Overall, untrustworthy news outlets captured 2.3% of web traffic and 14.0% of Facebook engagement, while news outlets regularly publishing false content accounted for 1.4% of web traffic and 6.8% of Facebook engagement. People largely turned to trustworthy news outlets during the 2020 coronavirus pandemic.
Ion Partition Detected in Homeopathically Manufactured Medicine Cuprum metallicum and Controls
Authors: Wassenhoven Michel Van , Nysten Bernard , Goyens Martine , Dorfman Pierre , Devos Philippe , Magnin Delphine
Published: August 2022

Background: Homeopathy is highly controversial. The main reason for this is its use of very highly dilute medicines (high homeopathic potencies, HHP), diluted beyond the Avogadro/Loschmidt limit. Research using Nano Tracking Analysis has demonstrated the presence of particles in HHPs. This study aims to verify the results of a previous publication that identified the ionic composition of these particles in all dilutions.

Methods: We used Scanning Electron Microscopy & Energy Dispersive X-Ray Spectroscopy (SEM-EDX) to examine dilutions of a commonly used homeopathic medicine, an insoluble metal, Cuprum metallicum, for the presence of particles (NPs). The homeopathic medicines tested were specially prepared according to the European pharmacopoeia standards. We compared the homeopathic dilutions/dynamizations of copper with simple dilutions and dynamized lactose controls.

Results: We observed an ionic diversity common to all preparations including HHPs but also significant differences in the relative quantity of each ion between manufacturing lines of homeopathic copper and lactose controls. The probability that the observed differences could have occurred chance alone (especially above Avogadro limit) can be rejected at p < 0.001. The essential component of these homeopathic medicines is sodium hydrogen carbonate, modulated by some other elements and by its quantity, size and shape.

Conclusion: Homeopathic medicines made of Cuprum metallicum do contain material with a specific ionic composition even in HHPs diluted beyond the Avogadro/Loschmidt limit. This specificity can be attributed to the manufacturing process. This material demonstrates that the step-by-step process (dynamized or not) does not match the theoretical expectations of a dilution process. The starting material and dilution/dynamization method influences the nature of these NPs. Further measurements are needed on other raw materials using the same controls (solvent and simply diluted manufacturing lines) to support these findings. The role of sodium bicarbonate must be carefully studied in the future.