bluuebunny/crossref_metadata_2025 huggingface dataset:
Mental Health Training Programs for Non-Health Professionals and Volunteers Working with Asylum Seekers and Refugees: A Scoping Review Protocol
Authors: Teixeira-Santos Luísa , Ventura Filipa , Teixeira Luísa , Cardoso Daniela , Abreu Wilson
Published: February 2022

The number of people forcibly displaced worldwide is increasing. It is an imperative challenge to provide mental health training for non-health professionals and volunteers who work with those vulnerable populations. The objective is to identify mental health training programs for non-health professionals and volunteers, without mental health training, to work with asylum seekers or refugees in any context. Literature about mental health training programs for adults, non-health professionals and volunteers without mental health training, working, or who have worked, or will work, with asylum seekers or refugees will be considered. Literature published in English, Swedish, Portuguese, Spanish, and French will be considered. Literature reporting training programs exclusively for professionals or volunteers in the health or mental health domains will be excluded. The following electronic databases will be searched: MEDLINE, CINAHL, PsycINFO, Psychology & Behavioral Sciences Collection, SCOPUS, ERIC, RCAAP, and OPEN GREY. Other sites to be searched: ClinicalTrials, UNHCR, IOM, WHO, Save the Children, IMISCOE, and IFRC. The screening process will entail two steps carried out by two independent reviewers: firstly, screening by title and abstract, and secondarily, by full text. Data will describe the literature according to the review research questions that were defined following the PPC mnemonic, and presented graphically with a narrative.
Foreign Body Aspiration in Children—Diagnostic Clues through a Clinical Case
Authors: D’Addio Elisabetta , Palma Pier Luigi , Di Sessa Anna , Guarino Stefano , Marzuillo Pierluigi , Apicella Andrea
Published: February 2022

Foreign body aspiration is common in the pediatric age group, especially in males. Despite the high frequency of this potentially life-threatening event, it is not always easy to recognize it given the high variability of the clinical presentation and the potential of “pauci-symptomatic” inhalation. Moreover, a variable latency of the onset of symptoms since the moment of aspiration may be possible determining difficulties in the identification of the inhalation on an anamnestic basis. We describe the case of a 19-month-old boy who accessed the emergency room initially for a head trauma. The clinical evaluation, however, revealed an unexplained serious respiratory distress needing tracheal intubation. After our evaluation, we hypothesized that the severe respiratory distress determined an altered state of consciousness with following head trauma. The radiological findings raised the suspicion of foreign body aspiration for the presence of an atelectasis of the entire left lung. The computed tomography showed an abrupt interruption of the main bronchus at 12 mm from the hull. The following bronchoscopy identified an almond of 2 cm. We will review the literature to underline the diagnostic issues behind foreign body aspiration in children by highlighting the diagnostic clues that are helpful for emergency clinicians in the management of this condition.
Optimization of Deep Eutectic Solvent Extraction of Phenolic Acids and Tannins from Alchemilla vulgaris L.
Authors: Kovač Martina Jakovljević , Jokić Stela , Jerković Igor , Molnar Maja
Published: February 2022

Alchemilla vulgaris L. is a good source of antioxidant components with an emphasis on phenolic acids and tannins. In this study, gallic acid, ellagic acid, and hydrolyzable tannins (HT) were extracted from this plant with different deep eutectic solvents (DESs), varying the amount of added H2O, temperature and extraction time. Seventeen DESs (n = 3) were used for the extraction, of which choline chloride:urea (1:2) proved to be the most suitable. The selection of the best solvent was followed by the examination of the influence of the extraction type and parameters using response surface methodology (RSM). Gallic acid content was in the range of 0.00–1.89 µg mg−1, ellagic acid content was 0.00–12.76 µg mg−1 and hydrolyzable tannin (HT) content was 3.06–181.26 µgTAE mg−1, depending on the used technique and the extraction conditions. According to the results, extraction by stirring and heating was the most suitable since the highest amounts of gallic acid, ellagic acid, and HT were extracted, and the obtained optimal values using response surface methodology (RSM) are confirmed by experimentally obtained values.
Efficacy of Chitosan Nanoparticle Loaded-Salicylic Acid and -Silver on Management of Cassava Leaf Spot Disease
Authors: Hoang Nguyen Huy , Le Thanh Toan , Thepbandit Wannaporn , Treekoon Jongjit , Saengchan Chanon , Sangpueak Rungthip , Papathoti Narendra Kumar , Kamkaew Anyanee , Buensanteai Natthiya
Published: February 2022

Leaf spot is one of the most important cassava diseases. Nanotechnology can be applied to control diseases and improve plant growth. This study was performed to prepare chitosan (CS) nanoparticle (NP)-loaded salicylic acid (SA) or silver (Ag) by the ionic gelation method, and to evaluate their effectiveness on reducing leaf spot disease and enhancing the growth of cassava plants. The CS (0.4 or 0.5%) and Pentasodium triphosphate (0.2 or 0.5%) were mixed with SA varying at 0.05, 0.1, or 0.2% or silver nitrate varying at 1, 2, or 3 mM to prepare three formulations of CS-NP-loaded SA named N1, N2, and N3 or CS-NP-loaded Ag named N4, N5, and N6. The results showed that the six formulations were not toxic to cassava leaves up to 800 ppm. The CS-NP-loaded SA (N3) and CS-NP-loaded Ag (N6) were more effective than the remaining formulations in reducing the disease severity and the disease index of leaf spot. Furthermore, N3 at 400 ppm and N6 at 200, 400, and 800 ppm could reduce disease severity (68.9–73.6% or 37.0–37.7%, depending on the time of treatment and the pathogen density) and enhance plant growth more than or equal to commercial fungicide or nano-fungicide products under net-house conditions. The study indicates the potential to use CS-NP-loaded SA or Ag as elicitors to manage cassava leaf spot disease.
A Comprehensive Review on the Emerging Roles of Nanofillers and Plasticizers towards Sustainable Starch-Based Bioplastic Fabrication
Authors: Tan Shiou Xuan , Andriyana Andri , Ong Hwai Chyuan , Lim Steven , Pang Yean Ling , Ngoh Gek Cheng
Published: February 2022

Petroleum-based plastics are associated with environmental pollution problems owing to their non-biodegradable and toxic properties. In this context, renewable and biodegradable bioplastics possess great potential to replace petroleum-based plastics in mitigating these environmental issues. Fabrication of bioplastic films involves a delicate mixture of the film-forming agent, plasticizer and suitable solvent. The role of the plasticizer is to improve film flexibility, whereas the filler serves as a reinforcement medium. In recent years, much research attention has been shifted toward devising diverse methods for enhancing the performance of bioplastics, particularly in the utilization of environmentally benign nanoparticles to displace the conventional hazardous chemicals. Along this line, this paper presents the emergence of nanofillers and plasticizers utilized in bioplastic fabrication with a focus on starch-based bioplastics. This review paper not only highlights the influencing factors that affect the optical, mechanical and barrier properties of bioplastics, but also revolves around the proposed mechanism of starch-based bioplastic formation, which has rarely been reviewed in the current literature. To complete the review, prospects and challenges in bioplastic fabrication are also highlighted in order to align with the concept of the circular bioplastic economy and the United Nations’ Sustainable Development Goals.
Green Resources for Safety Improvement and Sustainable Landscape Design: The Case of a Dangerous Tehran-Dizin Road Bend
Authors: Habibi Mahsa , Chitsazzadeh Elnaz , Mosavi Amir
Published: February 2022

Improving road safety is not only reliant on engineering aspects but also on the surrounding landscape, which plays an indispensable role in drivers’ visual perception. As a part of road landscapes, green areas affect road safety by screening or framing views. While vistas could be highlighted in safe spots in order for road users to enjoy their travel, in dangerous scenic points, visual attractions need to be concealed to lessen visual distractions and the risk of accidents. This study aims at optimizing road safety through sustainable landscape design in one of the dangerous Tehran–Dizin road bends to meet both road safety and environmental requirements. In doing so, cone of vision formulas have been applied to calculate measures of green landscape features so as to hide visual distractions and upgrade safety. To design such a green landscape, green resources and their characteristics have been elaborated, and native species have been suggested in plant composition, which can improve the sense of place, enhance the environment, and create a sustainable landscape. The research shows that a cone of vision could functionally be employed to increase the success of a designed green landscape, especially in situations where two-dimensional approaches are not sufficient.
A New Method of Image Classification Based on Domain Adaptation
Authors: Zhao Fangwen , Liu Weifeng , Wen Chenglin
Published: February 2022

Deep neural networks can learn powerful representations from massive amounts of labeled data; however, their performance is unsatisfactory in the case of large samples and small labels. Transfer learning can bridge between a source domain with rich sample data and a target domain with only a few or zero labeled samples and, thus, complete the transfer of knowledge by aligning the distribution between domains through methods, such as domain adaptation. Previous domain adaptation methods mostly align the features in the feature space of all categories on a global scale. Recently, the method of locally aligning the sub-categories by introducing label information achieved better results. Based on this, we present a deep fuzzy domain adaptation (DFDA) that assigns different weights to samples of the same category in the source and target domains, which enhances the domain adaptive capabilities. Our experiments demonstrate that DFDA can achieve remarkable results on standard domain adaptation datasets.
Recent Advances in Boundary Layer Ingestion Technology of Evolving Powertrain Systems
Authors: Diamantidou Dimitra Eirini , Hosain Md Lokman , Kyprianidis Konstantinos G.
Published: February 2022

The increasing environmental concern during the last years is driving the research community towards reducing aviation’s environmental impact. Several strict goals set by various aviation organizations shifted the research focus towards more efficient and environmentally friendly aircraft concepts. Boundary Layer Ingestion (BLI) is currently investigated as a potential technology to achieve different design goals such as energy efficiency improvement and noise emission reductions in the next generation of commercial aircraft. The technology principle is to place the propulsive unit within the boundary layer generated by the airframe body. Although several studies showed its theoretical benefits, a multidisciplinary nature is introduced in the design phase. This imposes new challenges on the current design tools. An increasing number of publications are focusing on assessing this technology while taking into account interlinks between different disciplines. The goal of this work is to review the current state-of-the-art of BLI evaluation studies. Particular focus is given to the underlying assumptions of each work, the methodology employed, and the level of fidelity of the tools used. By organizing the available work in a comprehensive manner, the up-to-date results are interpreted. The current trends and trade-offs emerging from studies are presented. Through reviewing the ongoing published work, the next steps for further development of the methods that will assess this technology are derived.
Using Soil Sustainability and Resilience Concepts to Support Future Land Management Practice: A Case Study of Mt Grand Station, Hāwea, New Zealand
Authors: Smith Carol , Jayathunga Sadeepa , Gregorini Pablo , Pereira Fabiellen C. , McWilliam Wendy
Published: February 2022

Soil acts as the integrator of processes operating within the biological and hydrological landscapes and responds to external disturbances and processes on varying time scales. The impact of any change results in a corresponding response in the system; which is dependent on the resistance of the soil system to the disturbance. Irreversible permanent change results when the soil system shifts over a threshold tipping point; with the soil system experiencing a regime shift with associated structural and functional collapse. Climate change is the most important external disturbance or stressor on these systems due to changes in precipitation, temperature and moisture regimes. Our research at Mt Grand is focused on approaches to increasing land use resiliency in the face of environmental change. Our purpose is to select and apply soil quality indices which can be used to assess soil resilience to external disturbance events for Mt Grand Station in New Zealand. We will identify biophysical variations and landscape drivers in soil resilience; and use these results to match land management practices with variations in soil resilience. For example, soils with low resilience will only have land management practices that have a low impact on the soil resource. We selected soil attributes that represented indicators of resistance, used to quantify the capacity of a soil to recover its functionality. We mapped this soil resilience framework against a national database of soil and landscape attributes for Mt Grand Station. The output from this research is to posit a conceptual framework of soil quality indices which relates to soil resilience, and thus to create a spatial map of soil resilience for Mt Grand Station.
A Study on the Influence of Conformity Behaviors, Perceived Risks, and Customer Engagement on Group Buying Intention: A Case Study of Community E-Commerce Platforms
Authors: Ou Chueh-Chu , Chen Kuan-Liang , Tseng Wei-Kuo , Lin Ya-Yun
Published: February 2022

This study mainly probed into the factors influencing consumers’ OGB intention on community e-commerce platforms, built models that included facets of conformity behaviors, perceived risks, customer engagement, and OGB intention, and focused on whether there is a mediating effect on customer engagement and an interference effect on perceived risks. The subjects of this study were consumers with OGB experience on community e-commerce platforms. The results show that conformity behaviors have a significant positive impact on customer engagement and OGB intention; thus, when customers have insufficient information or relevant knowledge of OGB, the comments or recommendations of their relatives and friends would influence their engagement and OGB intention. Moreover, this study found that customer engagement has a complete mediating effect, which indicates that conformity behaviors can influence OGB intention through customer engagement. In addition, this study found that perceived risks have an interference effect, meaning that when consumers sense high risks, the OGB intention is weakened through customer engagement. This shows that in the OGB organizations of the community e-commerce platforms, it is recommended that more attention be paid to customer engagement; it is also a topic worthy of discussion in practical business applications.
Analytical Implementation and Prediction of Hydraulic Characteristics for a Francis Turbine Runner Operated at BEP
Authors: Chen Yu , Zhou Jianxu , Karney Bryan , Guo Qiang , Zhang Jian
Published: February 2022

The extensive investigation and profound understanding of the hydraulic characteristics of the Francis turbine are crucial to ensure a safe and stable hydraulic system. Especially, predicting the runner’s hydraulic efficiency with high fidelity is mandatory at the early stage of a new hydropower project. For these purposes, the current technologies mainly include experimentation and CFD simulation. Both methods generally have the demerits of a long period, massive investment and high requirements for supercomputers. In this work, an analytical solution is therefore introduced in order to predict the internal flow field and working performance of the runner while the Francis turbine operates at the best efficiency point (BEP). This approach, based on differential-geometry theory and the kinematics of ideal fluid, discretizes the blade channel by several spatial streamlines. Then, the dynamic parameters of these streamlines are determined in a curved-surface coordinate system, including velocity components, flow angles, Eulerian energy and pressure differences across the blade. Additionally, velocity components are converted from the spatial-velocity triangle to the Cartesian coordinate system, and the absolute-velocity vectors as well as the streamlines are subsequently derived. A validation of this approach is then presented. The analytical solution of hydraulic efficiency shows good agreement with the experimental value and simulation result. Additionally, the distributions of pressure differences over the blade, velocity and Eulerian energy are well predicted with respect to the CFD results. Finally, the discrepancy and distribution of the dynamic parameters are discussed.
Diversification of Eco-Innovation and Innovation Activity of Small and Medium-Sized Enterprises in the European Union Countries
Authors: Sobczak Elżbieta , Głuszczuk Dariusz
Published: February 2022

The development of eco-innovation activities performed by enterprises remains one of the key challenges of sustainable development. In modern economies, the implementation of innovative technological solutions should also take into account performing eco-innovation activities by enterprises. The aim of the research was to assess the involvement level of small and medium-sized enterprises in eco-innovation activities, regarding the implementation of actions for the effective management of resources and the implementation of sustainable products, against the background of their involvement in innovation activities related to the implementation of product innovations and business processes, as well as the assessment of spatial-temporal diversity and trends for changes in this regard. The spatial scope of the research addresses 27 European Union countries, and the time scope of the research covers the years 2013–2020. The methods of multivariate statistical analysis, with particular emphasis on classification methods, were used in the research. The main finding of the research is the division of the European Union countries into three types of classes, including the countries assessed as: (1) poor eco-innovators and moderate innovators; (2) moderate eco-innovators and poor innovators; and (3) leaders of eco-innovation and innovation. The conducted research shows that SMEs in the European Union countries are much less involved in eco-innovation activities than in innovation ones; the level of involvement in eco-innovation can be divergent from that of involvement in innovation. Moreover, the involvement in eco-innovation does not show an upward trend.
Effect of Using Aluminum Sulfate (Alum) as a Surface Amendment in Beef Cattle Feedlots on Ammonia and Sulfide Emissions
Authors: Spiehs Mindy J. , Woodbury Bryan
Published: February 2022

The objective of this study was to measure NH3 from feedlot surface material (FSM) containing aluminum sulfate (alum). A 33-day lab-scale study was conducted using pans containing FSM and either 0, 2.5, 5, or 10% alum. The pH of the FSM was significantly lower (p < 0.01) when treated with 2.5, 5, and 10% alum as opposed to the 0% alum treatment. No NH3 volatilization occurred below a pH of 6.5. A second study determined that small, weekly doses of 5% alum did not lower NH3 emissions further than a single dose of 5% alum. Two studies on the feedlot surface demonstrated a significant decrease (p < 0.01) in pH in the areas of the pens where alum was added compared to those that did not receive alum. Ammonia concentrations were lower (p < 0.05) for the areas that received alum compared to those that did not receive alum for 7 days when 5% alum was applied and 14 days when 10% alum was applied. In all the studies, sulfide emissions increased when alum was added to the FSM. We concluded 10% alum may reduce NH3 emissions from beef feedlots temporarily, but higher sulfide emissions offset this benefit.
The New Urban Profession: Entering the Age of Uncertainty
Authors: Roggema Rob , Chamski Robert
Published: February 2022

The context of urbanism is changing rapidly. The context for working in the field of urban design and planning is influenced by the pace of change; uncertainty; and massive transitions. The urban professional, however, is still used to planning for small changes and repeating traditional approaches. In this paper, we have investigated major future tasks and problems that require rethinking the skills required from people working in the urban arena. By conducting in-depth conversation with leading thinkers in the field, the tension between idealism and the urgency to act versus realism and the trust in current systems dominated by economic laws is present. This results in the conclusion that a different skillset is required in order to face future complexities and to be able to connect design creativity with process sensitivity in short- and long-term periods and at small and large scales.
Study on the Refusal of Vaccination against COVID-19 in Romania
Authors: Mărcău Flavius-Cristian , Purec Sorin , Niculescu George
Published: February 2022

The refusal to be inoculated with the anti-COVID-19 vaccine by a part of the Romanian population becomes a barrier against controlling and stopping this particularly infectious virus. The rapid evolution of COVID-19 vaccines has created confusion regarding health and safety. Many Romanian citizens refuse vaccination because of fears generated by uncertainties based on information obtained from fake news. At the present moment, January 2022, Romania has one of the lowest vaccination rates in the European Union, below 45% of the total population. In our study, we want to identify the determining factors behind the refusal of vaccination, offering a sociological analysis that, we hope, will help to understand this phenomenon. The analysis revealed that 81% of the respondents trust the mandatory vaccines under the national scheme and 57.3% trust the optional ones other than the anti-COVID-19 vaccines (like Rotavirus, Hepatitis A and B, Influenza, Meningococcal, Pneumococcal, etc.) and have less confidence in the anti-COVID-19 vaccines. The study also reveals a very high percentage of respondents who trust fake news claims.
On the Evolution of Different Types of Green Water Events—Part II: Applicability of a Convolution Approach
Authors: Fontes Jassiel V. H. , Mendoza Edgar , Silva Rodolfo , Hernández Irving D. , González-Olvera Marcos A. , Torres Lizeth
Published: February 2022

Recent research related to the evolution of different types of green water events, generated in wave flume experiments, has shown that some events, such as plunging-dam-break (PDB) and hammer-fist (HF) types, can present multiple-valued water surface elevations during formation at the bow of the structure. However, the applicability of analytical models to capture the evolution (i.e., the spatio-temporal variation of water elevations) of these events has not been tested thoroughly. This could be useful when estimating green water loads in the preliminary design stage of marine structures. The present work extends the research by Fontes et al. (On the evolution of different types of green water events, Water, 13, 1148, 2021) to examine the applicability of an analytical convolution approach to represent the variation in time of single-valued water elevations of different types of green water events generated by incident wave trains, particularly PDB and HF types. Detailed experimental measurements using high-speed video in wave flume experiments were used to verify the applicability of the model for single and consecutive green water events of type PDB and HF. The present work is a tentative attempt to compare an analytical approach for HF evolution. Results were also compared with the classic analytical dam-break approach. It was found that the convolution model allows the variation of water elevations in time to be captured better in comparison with the dam-break approach. The convolution model described the trend of water elevations well, particularly at the bow of the structure. The model captured the peak times well in single and consecutive events with multiple-valued water surfaces. Results suggest that this conservative and simplified approach could be a useful engineering tool, if improved and extended, to include the evolution of green water events in time domain simulations. This could be useful in the design stages of marine structures subject to green water events.
Road Runoff Characterization: Ecotoxicological Assessment Combined with (Non-)Target Screenings of Micropollutants for the Identification of Relevant Toxicants in the Dissolved Phase
Authors: Sandré Fidji , Huynh Nina , Gromaire Marie-Christine , Varrault Gilles , Morin Christophe , Moilleron Régis , Le Roux Julien , Garrigue-Antar Laure
Published: February 2022

Road runoff (RR) is an important vector of micropollutants towards groundwater and soils, threatening the environment and ecosystems. Through combined chemical and biological approaches, the purpose of this study was to get insights on specific toxicants present in RR from two sites differing by their traffic intensity and their toxicological risk assessment. Non-target screening was performed by HRMS on RR dissolved phase. Ecotoxicological risk was evaluated in a zebrafish embryos model and on rat liver mitochondrial respiratory chain. Specific HRMS fingerprints were obtained for each site, reflecting their respective traffic intensities. Several micropollutants, including 1,3-diphenylguanidine (DPG) and benzotriazole (BZT) were identified in greater concentrations at the high-traffic site. The origin of DPG was confirmed by analyzing HRMS fingerprints from shredded tires. RR samples from each site, DPG and BZT were of relatively low toxicity (no mortality) to zebrafish embryos, but all generated distinct and marked stress responses in the light–dark transition test, while DPG/BZT mixes abolished this effect. The moderate-traffic RR and DPG inhibited mitochondrial complex I. Our study highlights (i) the unpredictability of pollutants cocktail effect and (ii) the importance of a multi-approaches strategy to characterize environmental matrices, essential for their management at the source and optimization of depollution devices.
Water Dynamics in an Infiltration Trench in an Urban Centre in Brazil: Monitoring and Modelling
Authors: Lopes Bezerra Paulo Henrique , Coutinho Artur Paiva , Lassabatere Laurent , Santos Neto Severino Martins dos , Melo Tassia dos Anjos Tenório de , Antonino Antonio Celso Dantas , Angulo-Jaramillo Rafael , Montenegro Suzana Maria Gico Lima
Published: February 2022

Infiltration trenches are compensatory techniques that consist of a reservoir filled with granular material. Their function is to store and infiltrate runoff water generated by rainfall. The objective of this work was to evaluate the hydraulic performance and model the water dynamics of an infiltration trench installed in the city of Recife, Pernambuco, Brazil. For each event, the response time of the infiltration system, the percentage of the infiltrated volume and the dynamics of water storage processes were analyzed as a function of rainfall events. The Puls method was used to model the events. The monitoring data demonstrated that the infiltration trench had a positive performance, infiltrating a large part of the drained volume, even with system overflows. The analyzed events presented an average emptying time of 6 days. The infiltration trench achieved its objective of decreasing the volume drained on the surface. The application of the Puls method in simulations of the monitored events showed satisfactory results in the statistical criteria coefficient of determination, deviation ratio and coefficient of residual mass, obtaining efficient adjustments, apart from a few exceptions. This study allowed us to prove the positive contribution of the trench to the water budget.
Derrida, los animales y el futuro de las humanidades
Authors: Calarco Matthew
Published: February 2022

En las páginas finales de “El futuro de la profesión o la universidad sin condición”, Derrida sugiere que el futuro de las humanidades tendrá que incluir un análisis de la historia de los conceptos que instituyen varias de las disciplinas que componen las humanidades. Dichos análisis históricos, señala, no habrían de ser neutrales. Por el contrario, estarían guiados por un intento de abrir estas disciplinas a modos de alteridad que no han sido pensados cuando se han constituido sus fundamentos. Que este tipo de consideración crítica también ha de ser extendido hasta incluir las problemáticas fundamentales de las humanidades en cuanto tales y en su conjunto (y no sólo de las disciplinas individuales que caen bajo esta rúbrica) es algo que Derrida no elude. De hecho, esta exigencia crítica es el primer tema que él señala cuando intenta delinear un proyecto positivo y cuasi-programático para las humanidades. Sugiere que las humanidades, si han de mantener el espíritu ético a partir del cual se constituyeron, tendrán que girar sus lentes críticos sobre sus propios conceptos fundamentales, esto es, sobre el concepto de “lo humano”.
Actividad catalítica de complejos de rodio (I) con ligandos bidentados a base de Fósforo en reacciones de hidroformilación de Canfeno
Authors: Montalvo Liliana , Bolaños Alberto , Cabrera Armando
Published: February 2022

Se prepararon los complejos RhCl(dppe), RhCl(dppp) y RhCl(dppb) donde dppe = difenilfosfino etano, dppp = difenilfosfinopropano; dppb = difenilfosfinobutano. Estos complejos fueron usados como precursores catalíticos en la reacción de hidroformilación de canfeno a diferentes concentraciones y temperaturas. Se encuentra que el mejor precursor catalítico es el complejo de Rodio con el ligando dppp, al parecer el ángulo P-Rh-P es muy importante en la activación del sustrato.
Caracterización espectroscópica y cromatográfica de curcumina extraída de los rizomas de Cúrcuma (cúrcuma longa l.) Cultivada en el departamento del Quindío
Authors: Ríos-V Eunice , Duque-C. Alba Lucia , León-R David Fabián
Published: February 2022

La extracción de compuestos de origen natural es una de las industrias en mayor crecimiento debido a los beneficios que presentan frente a sus análogos de origen sintético, en esta investigación se extrajo el principal compuesto coloreado de los rizomas de la cúrcuma (Curcuma longa L.): Curcumina con rendimiento del 7.03% tras 9 horas de extracción, utilizando soxhlet con solventes orgánicos (hexano y etanol). La separación y purificación se realizó por cromatografía de capa delgada y de columna, usando como fase móvil una mezcla de cloroformo y acetato de etilo. El colorante fue caracterizado por análisis espectroscópicos de ultravioleta visible (UV-Vis), infrarrojo (IR), resonancia magnética nuclear (1D-RMN y 2D-RMN) y espectroscopia de masas (EM). Los resultados obtenidos de los análisis fisicoquímicos de humedad, cenizas, extracto etéreo, contenido de fibras y contenido de curcumina de los rizomas de la región fueron comparados con los reportes de otras regiones del mundo, encontrando notables diferencias entre los parámetros comparados.
Diseño de software educativo basado en competencias
Authors: Caro Manuel Fernando , Toscano Raúl Emiro , Hernandez Filadelfia María , David María Elena
Published: February 2022

El presente artículo describe un modelo de diseño de software educativo basado en competencias, el cual presenta una visión integral del desarrollo de estas aplicaciones mediante la combinación de componentes pedagógicos, didácticos, multimediales y de ingeniería de software.

El modelo sugerido se compone de cinco fases que detallan paso a paso los aspectos a tener en cuenta para la creación de software educativo. La fase inicial constituye la descripción del diseño educativo, en la cual se analiza la necesidad educativa, se plantean los objetivos de aprendizaje y se describen las competencias que se pretenden desarrollar con la aplicación; del diseño de éstas resultan las siguientes subfases: diseño de contenidos, diseño pedagógico y diseño de aprendizaje. Las competencias son el aspecto fundamental que abarca el desarrollo de este modelo, las cuales son primordiales para la realización de las fases a seguir conformadas por el diseño computacional y el diseño multimedial, estas se encargan del análisis y modelado del software, y del sistema de comunicación hombre-máquina. En la fase de producción se ensamblan los componentes elaborados o recolectados, según el caso. La última fase es la de aplicación, donde se hacen las pruebas de rigor para evaluar el desempeño del software en los contextos para los que fue desarrollado.
Aplicación de un arreglo adaptativo de micrófonos para el realce de voz
Authors: Cadavid William Andrés , Peñafiel Jhon Alexander , Marín Jorge Iván
Published: February 2022

En este trabajo se describe el diseño de un arreglo adaptativo de micrófonos para el realce de voz en un ambiente tipo teleconferencia usando filtrado espacial. Se muestran las simulaciones del sistema en MATLAB cuyos resultados se usaron para determinar los algoritmos a utilizar en la implementación en tiempo real, asimismo se describe en detalle el esquema de la implementación, las optimizaciones necesarias y las pruebas de desempeño del sistema implementado. Este último fue realizado sobre un procesador digital de señales TMS320C6701 de Texas Instruments al que se le conectó un arreglo de 2 sensores. Las señales recogidas por los sensores se pasan por un ADC que digitaliza las señales que posteriormente son procesadas para: calcular el número de fuentes presentes en el entorno usando el criterio MDL; calcular la dirección de llegada con el algoritmo RootMUSIC y finalmente enfocar el arreglo hacia la dirección desde donde se origina la señal deseada.
Identificación de Bacterias que afectan el establecimiento in vitro de segmentos nodales de Guadua angustifolia Kunth
Authors: Ramírez Lorena Alexandra , Castaño Sandra Milena , López Rodolfo
Published: February 2022

El cultivo in vitro de segmentos nodales (medio y basal), de ramas de chusquines de Guadua angustifolia Kunth., presenta un alto grado de contaminación por bacterias afectando su micropropagación, en la fase de establecimiento. Para la identificación de las bacterias contaminantes, se seleccionaron siete grupos con características de aspecto y color, a las que se les aplicaron medios de cultivo diferenciales, como los utilizados para géneros bacterianos fitopatógenos, como: YDC; B de King; D1; y D5; además, se efectuaron pruebas bioquímicas para confirmar la identificación, como: tinción de Gram; prueba de Hugh y Leifson; Indol; y motilidad. Mediante la presente investigación, se llegó a la identificación de los géneros: Xanthomonas, Pseudomonas,  Agrobacterium,  y una asociación entre Erwinia-Pseudomonas. El género Pseudomonas fue el principal agente contaminante para los segmentos nodales basales (26.8%) y la asociación Erwinia-Pseudomonas para segmentos nodales medios (26.6%). La sensibilidad a los antibióticos por parte de las bacterias, se determinó a través del antibiograma, donde los géneros encontrados presentaron sensibilidad a  Amikacina, Gentamicina y Vancomicina.
LIPIDOS PLASMATICOS Y POLIMORFISMO XbaI DEL GEN DE LA APOB-100 EN UN GRUPO DE NIÑOS, Y JOVENES Y SUS PADRES
Authors: Loango Nelsy , Restrepo Beatriz , Torres Ana Lucia , Landázuri Patricia
Published: February 2022

Introducción: Algunos estudios ha mostrado asociación entre el polimorfismo XbaI del gen de la apolipoproteína B (apoB) y niveles plasmáticos de lípidos y  apoproteína B, pero otros no. Objetivo: determinar la relación entre lípidos plasmáticos, apoB y el polimorfismo XbaI en un grupo de niños y jóvenes de ambos sexos entre 4 y 18 años y sus padres. Métodos: Se estudiaron 63 niños y 85 padres. Los niños se dividieron en dos grupos: niños con hipercolesterolemia (CHC), colesterol total (CT)>175 mg/dl y niños sin hipercolesterolemia (SHC), CT<175 mg/dl. Se determinaron: genotipo XbaI (por la reacción en cadena de la polimerasa (PCR) y digestión con la enzima de restricción XbaI), perfil lipídico,  apB y apoA1. Resultados: De los individuos estudiados tenían genotipo X1X1, 28,37%, X1X2 64,86%, y X2X2 6,75%. La frecuencia alélica fue de 0,61 (X1) y 0,40 (X2). La frecuencia del genotipo X1X1 fue de 0,39 y 0,28 para niños CHC y SHC respectivamente y de 0,30 y 0,19 en sus padres respectivamente. No se encontraron diferencias en los niveles de CT y C-LDL, entre los alelos  X1 y el X2 en cada grupo. En el grupo de padres e hijos CHC, el alelo X2 tuvo niveles de triglicéridos (TG), más altos, sin ser significativos. Conclusiones: Las frecuencias alélicas y génicas son similares a las descritas para poblaciones occidentales y diferentes a las reportadas para la población oriental. En esta población no se encontró relación entre el polimorfismo XbaI del gen de la apolipoproteína B (apoB y los niveles de lípidos y apoB, sin embargo, se necesitan estudios complementarios.
FAKTOR-FAKTOR YANG MEMPENGARUHI ADOPSI BIBIT BERSERTIFIKAT PADA PERKEBUNAN RAKYAT(Studi pada Petani Kelapa Sawit di Kecamatan Bilah Hulu Kabupaten Labuhan Batu)
Authors: Karosekali Abednego
Published: February 2022

Penelitian ini bertujuan untuk menganalisis penggunaan bibit kelapa sawit bersertifikat pada perkebunan rakyat di Kecamatan Bilah Hulu, Kabupaten Labuhan Batu, Sumatera Utara. Model yang digunakan untuk menjelaskan penggunaan bibit kelapa sawit bersertifikat adalah DOI (Diffusion Of Innovation) dengan variabel Relative Advantage, Compatibility, Complexity, Triability, dan Observability. Metode yang digunakan untuk menguji pola hubungan korelasi variabel yaitu Analisis Linear Berganda dengan menggunakan program SPSS 24. Data penelitian ini adalah data primer diperoleh dengan menggunakan kuisioner yang dibagikan kepada petani kelapa sawit. Berdasarkan hasil regresi dan analisis data menggunakan uji t, nilai thitung pada variabel Relative Advantage sebesar 2.747, Complexity sebesar 2.762, dan Triability sebesar 4,922 lebih besar dari nilai ttabel 1,660 yang artinya memiliki pengaruh positif dan signifikan terhadap adopsi bibit kelapa sawit bersertifikat, sedangkan nilai thitung variabel Compatibility sebesar 1,351, dan Observability sebesar 1.543 lebih kecil dari nilai ttabel 1,660 yang artinya tidak memiliki pengaruh signifikan terhadap niat petani mengadopsi bibit kelapa sawit bersertifikat. Hasil uji koefisien determinasi (R2) menunjukkan bahwa variabel Relative Advantage, Compatibility, Complexity, Triability, dan Observability mampu menjelaskan variabel dependent yaitu Adoption sebesar 42,4% dan sisanya 57,6 % dijelaskan oleh variabel-variabel lain di luar model. Pengujian secara simultan menggunakan uji f dimana nilai fhitung sebesar 13.859 lebih besar dari nilai ftabel 2,31. Artinya secara simultan variabel Relative Advantage, Compatibility, Complexity, Triability, dan Observability berpengaruh signifikan terhadap niat petani mengadopsi bibit kelapa sawit bersertifikat di Kecamatan Bilah Hulu Kabupaten Labuhan Batu Sumatera Utara.
DAMPAK BERDIRINYA PERUSAHAAN KELAPA SAWIT TERHADAP KONDISI SOSIAL EKONOMI MASYARAKAT SEKITAR
Authors: Apriyanti Ira
Published: February 2022

Perubahan yang terjadi akibat berdirinya perusahaan kelapa sawit akan menimbulkan dampak positif atau sebaliknya akan menimbulkan hal-hal negatif yang justru merugikan masyarakat sekitar. Hal ini yang melatar belakangi penelitian karena penulis ingin mengetahui bagaimana dampak keberadaan perusahaan terhadap kondisi sosial dan ekonomi masyarakat sekitar. Penelitian ini bertujuan untuk melihat dampak yang ditimbulkan oleh keberadaan perusahaan terhadap kondisi sosial dan ekonomi masyarakat yang tinggal di lokasi sekitar perusahaan. Penelitian ini menyimpulkan bahwa dampak keberadaan perusahaan kelapa sawit di Desa Blankahan secara sosial dan ekonomi membawa banyak dampak positif. Adapun dampak positif terhadap kondisi sosial terlihat pada Pembangunan Fasilitas Umum, Pendidikan, Kesehatan dan Terhadap Pranata Sosial Lembaga- Lembaga masyarakat. Dampak positif terhadap kondisi ekonomi terlihat pada Kesempatan bekerja/berusaha semakin terbuka dengan adanya PT. United Kingdom Indonesia Plantations, sehingga dapat membantu pemerintah dalam mengurangi angka pengangguran di Desa Blankahan.
ANALISIS FAKTOR YANG MEMPENGARUHI KONSUMEN DALAM PENGAMBILAN KEPUTUSAN PEMBELIAN MINYAK GORENG CURAH
Authors: Delima Sri
Published: February 2022

“Analysis Of Factors Which Influence Consumers In Making Decision Purchase Oil Fry Bulk in Subdistrict Pantai Cermin.( Study Case : Housewives Appliances in Subdistrict Pantai Cermin" this research is guided by Myrna Pratiwi Nasution SP., MP .

The purpose of research it is to identify the characteristics of consumers of oil fry bulk location research , identify the decision -making of consumers in buying the product oil fried bulk and to determine the factors that influence on the decisions of consumers in the purchase of the product oil cooking of the samples performed by using the technique of purposive sampling with a sample of 100 respondents . The method of analysis that is used is the method of analysis of descriptive , analytical factors, multiple reservation the data supported by Microsoft Excel 2013 and statistical package of social science (SPSS) version 21. The research is conducted on the month in March -April 2020. The results of the study it can be concluded that (1) consumers of oil fried output is dominated by the age of 31-40 years (67 %), most large has a background of education junior high school (73%), clarification of the work of consumers on average mother house of stairs (100%). (2) the process of making the decision of purchase of consumer oil fried bulk through the five stages of the process are : introduction to the problem, the search for information , alternative evaluations , purchasing decisions , post- purchase behavior ; (3) the results of the analysis of the factors that the seven factors that are culture factors, social factor, personal culture of social factors, social psychological factors, psychological factors, culture factors, culture psychological factors.

 

Key Word : Oil Fry Bulk, Analysis Factor.
STUDI MORFOMETRIK IKAN PIMPIANG DI SUNGAI KUMU DESA RAMBAH KABUPATEN ROKAN HULU PROVINSI RIAU
Authors: Purnama Arief Anthonius
Published: February 2022

Penelitian tentang kajian morfometrik ikan pimpiang di Sungai Kumu Desa Rambah Kecamatan Rambah Hilir Kabupaten Rokan Hulu Provinsi Riau ini telah dilakukan dari bulan November 2018 sampai Januari 2019. Bertujuan untuk mengetahui keragaman jenis ikan dan karakter morfologi dari ikan pimpiang. Penelitian ini menggunakan metode survei dengan teknik pencuplikan sampel secara purposive sampling. Proses pengukuran karakter morfologi ikan pimpiang dengan menggunakan jangka sorong. Penelitian ini menemukan 15 individu ikan pimpiang yang terdiri dari 2 spesies. Berdasarkan penelitian yang telah dilakukan pada tiga stasiun penelitian bahwa rata-rata karakter morfologi Oxygaster anomalura dan Parachela oxygastroides memperlihatkan sedikit variasi. Karakter morfologi Oxygaster anomalura  memiliki kisaran panjang total 105,37-164,05 mm dengan rata-rata ± 128,23 mm, dan tinggi badan 15,14-32,89 mm dengan rata-rata ± 22,40 mm. Sedangkan karakter morfologi Parachela oxygastroides memiliki kisaran panjang total 105,27-119,60 mm dengan rata-rata ± 113,14 mm, dan tinggi badan 21,13-24,93 mm dengan rata-rata ± 22,93 mm.
PERTUMBUHAN DAN HASIL TANAMAN SELADA (Lactuca sativa L.) AKIBAT JENIS MEDIA TANAM HIDROPONIK DAN KONSENTRASI NUTRISI AB MIX
Authors: - Meriaty
Published: February 2022

Penelitian ini dilakukan mulai dari bulan Februari 2020 sampai dengan April 2020, yang dilaksanakan di Jalan Naga Bonar, Kecamatan Siantar, Kabupaten Simalungun, dengan ketinggian tempat ± 400 m dpl. Tujuan penelitian : untuk mengetahui pertumbuhan dan hasil tanaman selada akibat jenis media tanam hidroponik dan konsentrasi nutrisi ab mix serta interaksi kedua perlakuan. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) Faktorial dengan dua faktor yaitu Faktor pertama: Jenis media tanam hidroponik (M) terdiri dari 3 taraf yaitu: M1= Rockwool, M2= Arang Sekam dan M3 = Cocopeat. Faktor kedua : Konsentrasi nutrisi ab mix (N) yang terdiri dari 3 taraf yaitu: N1= 400 ppm , N2= 800 ppm , dan N3= 1200 ppm , parameter yang diamati adalah : Tinggi tanaman (cm), Luas daun (cm2), Bobot akar (g), dan Bobot tanaman (g) . Perlakuan jenis media tanam berpengaruh terhadap tinggi tanaman, luas daun, jumlah daun, bobot akar, dan bobot tanaman. Tingkat konsentrasi nutrisi Ab Mix juga berpengaruh nyata terhadap tinggi tanaman, luas daun, bobot akar, dan bobot tanaman. Interaksi Jenis media tanam dan konsentrasi nutrisi Ab Mix berpengaruh tidak nyata terhadap tinggi tanaman, luas daun, bobot akar dan bobot tanaman.
Türkiye’de Eğitim Politikaları Alanındaki Güncel Lisansüstü Tezlerin Bibliyometrik Profili
Authors: KULOĞLU Muhammet Esad
Published: February 2022

Eğitim politikaları, siyasi erklerin eğitim alanında yapmayı veya yapmamayı tercih ettiği kararlar ve uygulamaların tümünü tanımlayan kavramdır. Bu çalışmada 2015-2020 yılları arasında Türkiye’de eğitim politikaları alanında yapılan lisansüstü tezlerin çeşitli açılardan incelenmesi amaçlanmış ve bu doğrultuda bibliyometrik analiz yöntemi tercih edilmiştir. Belirtilen yıl aralığında eğitim politikaları alanında yapılan lisansüstü tezler Ulusal Tez Merkezi aracılığıyla belge incelemesi yöntemi ile taranmış; elde edilen veriler betimsel bibliyometrik ve içerik analizi yöntemleri ile analiz edilmiştir. Ulaşılan sonuçlara göre 2020 yılı hariç bu alanda yapılan çalışmaların yıllara göre artış gösterdiği, daha çok yüksek lisans düzeyinde yürütüldüğü ve Türkçe dilinde yazıldığı tespit edilmiştir. Araştırmaların çoğunda metodoloji bilgisine kısmen veya tamamen erişilememiştir. Metodoloji bilgisine erişilen çalışmalarda en çok nitel araştırma yaklaşımının ve durum çalışması deseninin tercih edildiği; veri toplama yöntemi olarak en çok belge incelemesi ve görüşme yönteminin, veri analiz yöntemi olarak da en çok betimsel analiz ve içerik analizi yöntemlerinin kullanıldığı sonucuna ulaşılmıştır. Çalışmaların konulara göre dağılılımda dönemsel eğitim politikaları, göçmen (mülteci) eğitimi politikaları, siyasi parti eğitim politikaları ve karşılaştırmalı eğitim politikaları başı çekmektedir. Bu türde çalışmaların gerek ilgili bilimsel alana katkıları gerekse araştırmacılar için yol gösterici niteliğinde olmalarından dolayı çeşitli aralıklarla tekrarlanması önerilir. Ayrıca bu araştırmada değinilmeyen ve araştırmanın bir sınırlılığını oluşturan, lisansüstü çalışmaların atıf ve kaynakça istatistiklerinin de dahil edildiği daha detaylı bibliyometrik bir çalışma yürütülebilir.