bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calidad educativa: “Una visión y práctica de innovación y desarrollo curricular en educación superior para Centroamérica”
Authors: Ruiz de Campos Maritza 
Published: May 2021

El desarrollo del artículo hace una referencia cronológica del estado de las teorías de la educación y como éstas se han ido desarrollando través de la práctica didáctica pedagógica y como siguen predominado en algunos enfoques educativos, se aborda la educación y su relación con la gestión educativa a nivel de educación superior, las principales tendencias de la esencia e innovación curricular y de la educación, su impacto en el desarrollo para las Educación Superior en Centroamérica, la innovación y desarrollo curricular como una práctica de tecnología educativa. La calidad educativa, debe actualmente centrarse por supuesto en una visión y práctica de innovación y desarrollo curricular a nivel de una educación superior más inclusiva, lo cual deriva de un modelo de gestión y desarrollo institucional de las instituciones para impartir los diferentes programas y carreras en el nivel de educación superior, esto conllevará a generar ranking en calidad educativa y, por supuesto, esto impactará como indicador de desarrollo para cada uno de las carreras y programas educativos, que lleven la excelencia como práctica en la formación de los estudiantes, y puedan también insertarse a los programas de internacionalización de la educación.
Evaluación de la calidad de vida relacionada al climaterio y menopausia
Authors: Argueta Álvarez Roxana 
Published: May 2021

El climaterio es un periodo de transición que pone término a la capacidad reproductiva de la mujer. Inicia antes de que se produzca el cese del periodo menstrual; mientras que la menopausia se caracteriza por ausencia total, provocando alteraciones somáticas, psicológicas y genitourinarias. Objetivo: Determinar la calidad de vida de las mujeres en la etapa del climaterio y la menopausia. Metodología: Estudio cuantitativo de alcance descriptivo, en mujeres de la zona oriental, con criterio de inclusión de edades entre 45 y 55 años. El instrumento utilizado fue la Escala de Puntuación Menopáusica (Menopause Rating Scale, MRS), incluyendo preguntas relacionadas a la salud en general. Principios éticos: previo consentimiento informado de cada una de las participantes, respetando el derecho de confidencialidad.Resultados: Participaron 123 mujeres, los síntomas más frecuentes, con escala de valor desde leve a intolerable, son las molestias musculares y articulares (86%) a ellas le sigue el cansancio físico y mental (82%) y la irritabilidad (76%). Según los dominios que componen la escala MRS, se presentan con mayor frecuencia los de naturaleza psicológica, paralelamente relacionados al somato vegetativo.Conclusiones / Recomendaciones: el diagnóstico de patologías como hipertensión y diabetes en las pacientes influye en la severidad de la sintomatología, repercutiendo directamente en la calidad de vida de las mismas. Es importante considerar la vulnerabilidad de la familia dentro de los programas de atención a la mujer en este proceso, contribuyendo a la asimilación y mejora de la calidad de vida de la mujer.
High-Fidelity Wrist Fracture Phantom as a Training Tool to Develop Competency in Orthopaedic Surgical Trainees
Authors: Raeker-Jordan Elisha A. , Martinez Miguel , Aziz Keith T. , Miles Megan R. , Means Kenneth R. , LaPorte Dawn M. , Giladi Aviram M. , Shimada Kenji 
Published: May 2021

Background:
This article will describe the development of a low-cost 3D-printed medical phantom of the arm with a distal radius fracture (DRF) to facilitate training of reduction and splinting techniques. The phantom incorporates tactile responses and visual stimuli from fluoroscopy to assist skill acquisition in a clinical setting. This provides feedback to trainees to help them develop competency and knowledge before providing care to patients.

Methods:
Phantoms were developed through advice and feedback from fellowship-trained hand surgeons and orthopaedic senior and junior residents. Phantoms were then pilot tested during a surgical skills examination, with residents having minimal previous exposure to distal radial reduction techniques. Residents were evaluated on procedure speed and accuracy by attending surgeons using the objective structured assessment of technical skills. Residents then completed a written knowledge examination about relevant requirements of DRF management and feedback on their opinion of the exercise using the Likert scale.

Results:
Residents who passed the hands-on examination also scored higher on the written examination. All residents reported that the phantom was beneficial and motivating as part of their overall training.

Discussion:
Real-time feedback using a phantom limb and fluoroscopic imaging, in conjunction with guidance from surgeons, allows residents to learn and practice DRF reduction and splinting techniques. These educational exercises are relatively low-cost and remove the risk of potential harm to patients during early skill acquisition. This training method may be a predictor of surgical performance in addition to providing assessment of background knowledge. Additional training sessions will be required to determine the effect of repeat exposure to residents' proficiency and comprehension.
ON $L^2_W$ QUASI-DERIVATIVES FOR SOLUTIONS OF PERTURBED GENERAL QUASI-DIFFERENTIAL EQUATIONS
Authors: IBRAHIM SOBHY EL-SAYED 
Published: May 2021

This paper is concerned with square integrable quasi-derivatives for any solution of a general quasi-differential equations of nth order with complex coefficients $M[y] -\lambda wy = w f(t, y^{[0]}, \cdots ,y^{[n- 1]})$, $t \in [a,b)$ provided that all $r$th quasi-derivatives of solutions of $M[y] -\lambda wy = 0$ and all solutions of its formal adjoint $M^+[z] -\lambda wz = 0$ are in $L _W^2(a, b)$ and under suitable conditions on the function $f$.
Impact of Manganese on Pollen Germination and Tube Growth in Lily
Authors: Sawidis Thomas , Baycu Gülriz , Weryszko-Chmielewska Elżbieta , Sulborska Aneta 
Published: May 2021

Abstract
In vitro culture of
Lilium longiflorum
pollen grains was carried out to determine the role of manganese in pollen germination and pollen tube growth. Pollen germination was adversely affected by the presence of manganese (>10
−8
M), whereas low concentrations (10
−12
–10
−10
M) stimulated the process. Manganese caused morphological anomalies during tube growth, characterized by irregular pollen tube thickening and swollen tips. The main effect was the anomalous cell wall formation at the tip, in which the presence of several organelles reduced the number of secretory vesicles. A loose network of fibrillar material and spherical aggregates, mostly in the tip region, was detected, and this material was progressively loosened into the surrounding medium. As a response to potential toxicity, the excess manganese was isolated in vacuoles, which formed an internal barrier against penetration of manganese to the tip area. Elevated manganese concentrations might affect plant reproduction, resulting in anomalies in gamete development. Consequently, the loss in genetic diversity and decreased fruit set ultimately lower yield.
The Lichen Biota of Pinus sylvestris Under the Impact of Some Stand-Related Factors: A Case Study from the South-Eastern Part of Żerków-Czeszewo Landscape Park (Wielkopolska-Kujawy Lowland)
Authors: Zarabska-Bożejewicz Daria , Kujawa Krzysztof 
Published: May 2021

AbstractA lichenological inventory was conducted in the pine stands in the south-eastern region of Żerków-Czeszewo Landscape Park. The aim of this study was to recognize the lichen species diversity on the bark ofPinus sylvestrisby considering tree age and forest habitat type. In total, 26 species of lichenized fungi were found on the bark ofP. sylvestris. The biota comprises common and widespread species in Poland. Tree age positively and significantly influenced the species richness on the bark ofP. sylvestris. The suitability of the pine tree age for lichens evident as alpha diversity seemed to be independent from the habitat of the trees. The age of phorophytes strongly affected the presence ofHypocenomyce scalaris. Mixed fresh coniferous forests were characterized by higher beta- and gamma diversity compared to fresh coniferous forests. There was no correlation between the number of species per tree (alpha diversity) and diversification of species composition in relation to the distance between pines. The findings indicate that maintenance of a variety of phorophytes and age-diversified tree stands can prevent impoverishment of the lichen biota in the south-eastern part of Żerków-Czeszewo Landscape Park.
Porous ZnO Nanostructures Synthesized by Microwave Hydrothermal Method for Energy Harvesting Applications
Authors: Henriques Ferreira Sofia , Rovisco Ana , dos Santos Andreia , Águas Hugo , Igreja Rui , Barquinha Pedro , Fortunato Elvira , Martins Rodrigo 
Published: May 2021

The ever-growing global market for smart wearable technologies and Internet of Things (IoT) has increased the demand for sustainable and multifunctional nanomaterials synthesized by low-cost and energy-efficient processing technologies. Zinc oxide (ZnO) is a key material for this purpose due to the variety of facile methods that exist to produced ZnO nanostructures with tailored sizes, morphologies, and optical and electrical properties. In particular, ZnO nanostructures with a porous structure are advantageous over other morphologies for many applications because of their high specific surface area. In this chapter, a literature review on the latest progress regarding the synthesis and applications of ZnO with a porous morphology will be provided, with special focus on the synthesis by microwave hydrothermal method of these nanomaterials and their potential for application in energy harvesting devices. Nanogenerators of a composite made by polydimethylsiloxane (PDMS) and porous ZnO nanostructures were explored and optimized, with an output voltage of (4.5 ± 0.3) V being achieved for the best conditions. The daily life applicability of these devices was demonstrated by lighting up a commercial LED, by manually stimulating the nanogenerator directly connected to the LED.
In Vitro Diagnostics for COVID-19: State-of-the-Art, Future Directions and Role in Pandemic Response
Authors: Kumar Vashist Sandeep , Murugan Subramanian , Djoko Guiffo 
Published: May 2021

There have been tremendous advances in in vitro diagnostics (IVD) for coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Although the confirmatory clinical diagnosis is made by real-time reverse transcriptase polymerase chain reaction (RT-PCR), lateral flow immunoassay (LFIA) based viral antigen (Ag) detection is used for mass population screening at point-of-care (POC) settings. The rapid RT-PCR tests (such as from Cepheid and Bosch) have an assay duration of less than 40 min, while most rapid Ag tests (such as Abbott’s BinaxNOW™ COVID-19 Ag card) have an assay duration of about 15 min. Of interest is the POC molecular test (ID NOW™) from Abbott that takes less than13 min. Similarly, many immunoassays (IAs), i.e., automated chemiluminescent IA (CLIA), manual ELISA, and LFIA, have been developed to detect immunoglobulin G (IgG), immunoglobulin M (IgM), and immunoglobulin A (IgA) produced in subjects after SARS-CoV-2 infection. Many IVD tests have been approved by the United States Food and Drug Administration (FDA) under emergency use authorization (EUA), and almost all IVD tests are Conformité Européenne (CE) certified.
Revision of type specimens of Astaena (Coleoptera: Scarabaeidae: Melolonthinae: Sericini) described by L.W. Saylor
Authors: Pacheco Thaynara L. , Monné Marcela L. , Vaz-De-Mello Fernando Z. , Ahrens Dirk 
Published: May 2021

This is the first part of a revision of the type specimens of the South American Sericini. Herein, we examine type specimens of Astaena described by Lawrence Webster Saylor (1913–1999). We provide diagnostic redescriptions, images of habitus, aedeagus, and labels of the type specimens of all 18 species described by him in the genus Astaena. We raise Sayloria Frey, 1973, a former subgenus of Symmela Erichson, 1835 that includes three species, to genus level. Our study results in the following new combinations and synonymy: Sayloria bicoloripes (Saylor, 1946) comb. nov. (= A. postnodata Frey, 1973 syn. nov.), S. abcora (Saylor, 1946) comb. nov. (= A. apolinarmaria Saylor, 1946 syn. nov.) and S. pottsi (Saylor, 1946) comb. nov.
Identifying Key Transport Mechanisms in Organic Antiambipolar Transistors
Authors: Kim Chang‐Hyun , Yoo Hocheon 
Published: May 2021

AbstractAntiambipolar current is an enabling feature for a wide range of unconventional devices. At the same time, it still remains as a new phenomenon without sufficiently deep understanding. This article sheds light on the principles of organic antiambipolar transistors (AATs) that exploit this fundamental phenomenon, focusing on the identification of their governing charge‐transport mechanisms. Variable‐temperature current–voltage measurements are employed as a key diagnosis tool, and a series of in‐depth physical analyses are provided to directly correlate the whole AAT with its sub‐component field‐effect transistors. The gate‐selective potential transition and drift over the depleted channel are found to be responsible for the uniquely shaped AAT switching curve, thus laying a foundation for systematic device engineering.
Phenotype‐driven variant filtration strategy in exome sequencing toward a high diagnostic yield and identification of 85 novel variants in 400 patients with rare Mendelian disorders
Authors: Marinakis Nikolaos M. , Svingou Maria , Veltra Danai , Kekou Kyriaki , Sofocleous Christalena , Tilemis Faidon‐Nikolaos , Kosma Konstantina , Tsoutsou Eirini , Fryssira Helen , Traeger‐Synodinos Joanne 
Published: May 2021

AbstractAbout 6000 to 7000 different rare disorders with suspected genetic etiologies have been described and almost 4500 causative gene(s) have been identified. The advent of next‐generation sequencing (NGS) technologies has revolutionized genomic research and diagnostics, representing a major advance in the identification of pathogenic genetic variations. This study presents a 3‐year experience from an academic genetics center, where 400 patients were referred for genetic analysis of disorders with unknown etiology. A phenotype‐driven proband‐only exome sequencing (ES) strategy was applied for the investigation of rare disorders, in the context of optimizing ES diagnostic yield and minimizing costs and time to definitive diagnosis. Overall molecular diagnostic yield reached 53% and characterized 243 pathogenic variants in 210 cases, 85 of which were novel and 148 known, contributing information to the community of disease and variant databases. ES provides an opportunity to resolve the genetic etiology of disorders and support appropriate medical management and genetic counseling. In cases with complex phenotypes, the identification of complex genotypes may contribute to more comprehensive clinical management. In the context of effective multidisciplinary collaboration between clinicians and laboratories, ES provides an efficient and appropriate tool for first‐tier genomic analysis.
Lemur paparazzi: Arboreal camera trapping and occupancy modeling as conservation tools for monitoring threatened lemur species
Authors: Chen Devin M. , Narváez‐Torres Pamela R. , Tiafinjaka Olivia , Farris Zach J. , Rasoloharijaona Solofonirina , Louis Edward E. , Johnson Steig E. 
Published: May 2021

AbstractPrimate species face growing risks of extinction throughout the world. To better protect their populations, effective monitoring techniques are needed. The goal of this study was to evaluate the use of arboreal camera traps and occupancy modeling as conservation tools for threatened lemur species. This project aimed to (1) estimate the occupancy and detection probabilities of lemur species, (2) investigate factors potentially affecting lemur habitat use, and (3) determine whether ground or arboreal cameras are better for surveying lemur assemblages. We conducted camera trapping research in five forest fragments (total trap nights = 1770; 900 arboreal trap nights (134 photo events); 870 ground trap nights (2 photo events)) and reforestation areas (total trap nights = 608; 1 photo event) in Kianjavato, Madagascar from May to September 2019. We used arboreal trap data from fragments to estimate occupancy for five species: the red‐fronted brown lemur (Eulemur rufifrons;ψ = 0.54 ± SD0.03), Jolly's mouse lemur (Microcebus jollyae;ψ = 0.14 ± 0.17), the greater dwarf lemur (Cheirogaleus major;ψ = 0.42 ± 0.30), the red‐bellied lemur (Eulemur rubriventer;ψ = 0.24 ± 0.03), and the black‐and‐white ruffed lemur (Varecia variegata;ψ = 0.24 ± 0.08). Tree diameter, elevation, distance to village, and canopy connectivity were important predictors of occupancy, while camera height, canopy connectivity, fragment ID, and fragment size predicted detection. Arboreal cameras recorded significantly higher species richness compared with ground cameras. We suggest expanded application of arboreal camera traps in future research, but we recommend longer trapping periods to better sample rarer species. Overall, arboreal camera trapping combined with occupancy modeling can be a highly efficient and useful approach for monitoring and predicting the occurrence of elusive lemur species and has the potential to be effective for other arboreal primates and canopy taxa across the globe.
Interfacial Polymerization at the Alkane/Ionic Liquid Interface
Authors: Liu Chang , Yang Jing , Guo Bian‐Bian , Agarwal Seema , Greiner Andreas , Xu Zhi‐Kang 
Published: May 2021

AbstractPolymerization at the liquid–liquid interface has attracted much attention for synthesizing ultrathin polymer films for molecular sieving. However, it remains a major challenge to conduct this process outside the alkane–water interface since it not only suffers water‐caused side reactions but also is limited to water‐soluble monomers. Here, we report the interfacial polymerization at the alkane/ionic liquid interface (IP@AILI) where the ionic liquid acts as the universal solvent for diversified amines to synthesize task‐specific polyamide nanofilms. We propose that IP@AILI occurs when acyl chloride diffuses from the alkane into the ionic liquid instead of being triggered by the diffusion of amines as in the conventional alkane–water system, which is demonstrated by thermodynamic partitioning and kinetic monitoring. The prepared polyamide nanofilms with precisely adjustable pore sizes display unprecedented permeability and selectivity in various separation processes.
2,4‐Dinitrophenol: ‘diet’ drug death following major trauma
Authors: Freeman N. , Moir D. , Lowis E. , Tam E. 
Published: May 2021

SummaryThere has been a resurgence in the illicit use of 2,4‐dinitrophenol by people wishing to achieve rapid weight loss. Despite its availability, the drug is banned for human consumption as it is toxic and can have fatal consequences. We present the case of a 23‐year‐old man who regularly consumed 2,4‐dinitrophenol to generate fat loss without apparent ill effect. He was involved in a high‐speed road traffic collision and sustained limb‐threatening injuries. The combination of emergency surgery, trauma and 2,4‐dinitrophenol consumption culminated in deterioration under anaesthesia, with subsequent death from multiorgan failure in the intensive care unit 48 h later. Previous cases have reported death from 2,4‐dinitrophenol toxicity alone. We believe this is the first reported case of 2,4‐dinitrophenol toxicity triggered by the additional physiological stress of polytrauma and emergency surgery.
Thermal stability, surface wettability and mechanical behavior of highly ordered ZnO‐doped thermoplastic polyurethane films with hierarchically porous structures
Authors: Yin Zuozhu , Yuan Feng , Zhou Dongpeng , Li Min , Chen Xiaoxiang , Liu Yan , Xue Mingshan , Luo Yidan , Hong Zhen , Xie Chan 
Published: May 2021

AbstractIn this paper, the effect of ZnO nanoparticle on thermal, microstructure, mechanical behavior, superhydrophobicity of thermoplastic polyurethane (TPU), ZnO/TPU composite materials with doped‐ZnO nanoparticles were obtained via a solution blending method. The results show that the melting temperature region in soft segments of ZnO/TPU composite materials was the transition temperature region. The added ZnO slightly enhances the crystalline slipped of ZnO/TPU composite materials, and effectively hinder the transfer of high temperature small gas molecules. Due to the added ZnO nanoparticles, the microphase separation and ordered structures in TPU are reduced. In TPU, and between TPU and ZnO nanoparticles, there are variations in electron density at hard phase and soft phase interfaces. The good ZnO/TPU composites exhibit high water repellence with water contact angle of ~157°. The prepared ZnO/TPU nanocomposites show mechanical properties that are superior to those of pristine TPU. Tensile strength and storage modulus increase by 47.1% and 39.8% at ZnO loading values of 10 wt%. The results indicate that thermal behavior, microstructure, superhydrophobicity and the mechanical behavior of TPU composite materials can be enhanced by the doped ZnO.
Polydimethylsiloxane crosslinking kinetics: A systematic study on Sylgard184 comparing rheological and thermal approaches
Authors: Bardelli Tiziana , Marano Claudia , Briatico Vangosa Francesco 
Published: May 2021

AbstractIn this work a systematic investigation of crosslinking kinetics of Sylgard184 polydimethylsiloxane is performed in both isothermal and dynamic conditions. The results are discussed in terms of two conversions, αC and αR determined by thermal and rheological analysis, respectively. Thermal analysis can well detect the first stage of the reaction, while rheological analysis starts being sensitive only at longer time. However, once the rheological response is observable, it changes with time faster than the calorimetric one. From rheology experiments it comes out that the gel point occurs at αR = 0.53, independently of the applied thermal history. At gel point, αC is around 0.30 indicating that about 30% of the bonds involved in the crosslinking process is enough to create an infinite network. A modified version of the Kamal's autocatalytic model allows to fit and predict the experimental findings from both the techniques; however, two distinct sets of parameters have been used. The results of this work may be a useful tool to design appropriate curing cycles for the preparation of Sylgard184.
Robust predictive iterative learning control for linear time‐varying systems
Authors: Liang Chao , Zou Yun , Cai Chenxiao 
Published: May 2021

AbstractA novel control technique is proposed by combining iterative learning control (ILC) with model predictive control (MPC) for a trajectory tracking problem of linear time‐varying systems (LTVSs) in this paper. By introducing prediction mechanism along both of the iteration and time directions instead of only one direction, the control law is successively updated along two directions by learning from the predictive and compensatory information. The new control law can improve convergence speed and effectively suppress the uncertainties in initial states, external disturbances, and model mismatches. The convergence conditions are rigorously derived and analyzed as well. An example is given to illustrate the effectiveness of the obtained results.