bluuebunny/crossref_metadata_2025 huggingface dataset:
Exfoliación mecánica relevante en la sintesis de materiales tipo polioxometalatos y GO
Authors: Fernández Sánchez Rocio , Espinosa González Claudia Guadalupe , Cuara Díaz Edgar , Mercado Silva Jesús Alfonso
Published: September 2024

En este trabajo se reporta la obtención de materiales híbridos basados en POM (polioxometalatos) y GO (óxido de grafeno) preparados a partir de grafito expandido y exfoliado mecánicamente, con el propósito de acceder a su aplicación como electrodos en supercondensadores (SC). El procedimiento aquí reportado resultó en un proceso económico y con un tiempo corto de síntesis. Para la elaboración de los materiales se emplearon dos rutas sintéticas: usando a) punta ultrasónica y b) agitación magnética. El resto de las condiciones experimentales (solvente, tiempo de reacción, secado, etc.) se mantuvieron sin cambio. Se determinaron las propiedades fisicoquímicas y electroquímicas de los nanocompositos obtenidos usando DRX, Raman, Análisis elemental mediante EED-MEB y VC. Con base en los resultados se confirmó la obtención del material compuesto HPMo-GO esperado; los resultados también mostraron que la exfoliación mecánica, a la que fue sometido grafito expandido fue la clave para lograr una eficiencia de reacción similar tanto en la ruta magnética como en la ruta por punta ultrasónica.
Síntesis mecanoquímica de zeolita A modificada con Cu
Authors: Murrieta-Rico Fabian N. , Antúnez-García Joel , Xiao Mufei , Reyes Serrato Armando , Zamora Jonathan , Petranovskii Vitalii
Published: September 2024

Las zeolitas son materiales cristalinos con una amplia gama de aplicaciones, cuya diversidad es posible debido a las propiedades de estos materiales. Entre sus características inherentes, se sabe que las zeolitas pueden ser modificadas con nanopartículas y clusters de otras especies químicas, lo que les otorga propiedades novedosas y permite encontrarles aplicaciones inusuales. Por lo tanto, el uso práctico de estos materiales puede mejorarse mediante la búsqueda de nuevos métodos de modificación y el estudio de los materiales resultantes. El objetivo de este trabajo es evaluar los resultados de la modificación mecanoquímica de la zeolita A con cobre. La zeolita A se sintetizó de acuerdo con la metodología estándar y luego se mezcló con sulfato de cobre y se sometió a molienda. La zeolita A original y la zeolita CuA modificada con cobre se examinaron mediante SEM, UV-Vis y XRD. Posteriormente, se compararon las características de ambas muestras y se estudió el efecto del ataque mecanoquímico.
Por uma comunidade epistêmica da Luta Marajoara
Authors: Santos Carlos Afonso Ferreira dos , Freitas Rogério Gonçalves de , Furtado Renan Santos , Andrade Welison Alan Gonçalves , Cardias-Gomes Fábio José
Published: September 2024

Introdução: Pesquisadores, professores, artistas, cinegrafistas, instituições regulamentadoras e fazedores de políticas têm se interessado cada vez mais pela luta tradicional do Marajó, o que tem contribuído para a sua valorização, difusão, reconhecimento e produção do conhecimento. Objetivo: explorar o reconhecimento e a consolidação da Luta Marajoara como um campo particular, merecedor de sua própria comunidade epistêmica. Metodologia: o ensaio segue as orientações epistemológicas do trabalho intelectual como artesanato, utilizando a literatura e reflexões existentes como um laboratório analítico para mapear a rede epistêmica da Luta Marajoara. Resultados e discussão: indica-se princípios fundamentais para o estabelecimento de uma comunidade epistêmica para a Luta Marajoara: intercâmbio de saberes locais e acadêmicos; colaboração pluridisciplinar; sustentabilidade; e honestidade e integridade acadêmica. Considerações Finais: uma comunidade epistêmica da Luta Marajoara desempenharia o papel de registrar a memória, avaliar e produzir conhecimento socialmente relevante sobre essa luta brasileira. Ela agregaria atores com experiência e competência legitimada para compreender suas práticas e propor avanços qualitativos nas pesquisas, imbricando os campos científicos e sociais na busca por maior reconhecimento e valorização desta prática corporal nortista-brasileira.
Evolving MPD with Human Factors Approach
Authors: Sales I. M. , Nazareth V. R.
Published: September 2024

MPD technique has been successfully used to enable drilling in harsh environments. Despite the benefits, it is still seen with some skepticism in scenarios where it is not mandatory. In part due to the MPD failures observed and the added complexity of MPD application, when compared to conventional operations.

During the evolution of the technique, with increased complexity and more challenging scenarios, a great effort has been applied to develop better training and competency of the teams, since many failures can be directly linked to human error.

However, a better look should be given to the technique with a Human Factor approach. Can we really expect human not to failure in a challenging scenario with a complex technique? Although great effort was made in building competency, human error still continues.

Training plays an important role on the MPD, but other aspects should be considered, such as: communication, responsibility for the task, suitability of the procedure to the task, among others. Therefore, it is crucial to consider other contributing factors like organizational (and industry), technological and environmental.

This paper presents human errors collected from more than 100 wells drilled in deepwater and proposes a complementary interpretation of the raw causes with focus on human factors, beyond the need for training. It shows that human errors are often the sign of organizational or technological issues and proposes methods to mitigate them.

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100+ Deepwater MPD Wells Learnings
Authors: Fernandes A. A. , Vanni G. S. F. , Terra F. S.
Published: September 2024

MPD offshore in deepwater is less than 20 years old. Over the last decade there was noticeable evolution of usage of MPD technology. The industry acceptance of what is considered the correct application of the technology has evolved over the years. The first barrier concept and well control practices now consider the capability and characteristics of MPD technology. This allowed the undrillable wells to be drilled with almost no penalty when compared to a conventional well intervention. The operational awareness improved, due to new capabilities of MPD techniques, leading to an improvement on the overall efficiency of the intervention.

The sustained use with better understanding of the benefits of the technology lead to more refined applications of MPD, while reducing the added operational time. New applications also were developed using existing equipment, widening the deployment extent of MPD during well construction and maintenance.

Still, major discussions are needed to further develop the technology on deepwater scenarios. Completion and workover are still not discussed in depth in the industry and operational concepts between different disciplines must align considering MPD advantages and limitations.

This paper presents key aspects of the evolution of MPD application based on the experience of drilling more than 100 wells using MPD on deepwater scenarios. Regarding the MPD evolution, a revision of the internal and external operations, through several papers and publications allows the identification of different factors that changed over the years.
MPD Deepwater Drilling: A Case Study of MPD Surface Back Pressure Implementation for a Sidetrack Exploration Well in the Gulf of Mexico
Authors: Luis R. A. Gonzalez , Happoff R. , Meyer E. , Hampshire K. , Taques A. , Scott N. , Duong L. , Barker I.
Published: September 2024

Managed Pressure Drilling (MPD) was identified as the differentiating technology to successfully execute a sidetrack deepwater exploration prospect in the Gulf of Mexico. Conventional drilling efforts were suspended on the original hole due to multiple pressure management issues, such as losses, ballooning, and wellbore instability. MPD was selected as an enabler for overcoming these challenges. The sidetrack was planned to exit the existing 14-inch casing and run three additional strings of casing/liners to a planned total depth (TD) over 31,000 ft MD. MPD was strategically integrated to address operational hurdles and acquire valuable subsurface data. MPD enabled the liners' shoe to be set deeper in two sections than the original wellbore, increasing the probability of reaching well TD. Given the well's exploratory nature and lack of offset information, a statically underbalanced mud was used, giving maximum flexibility to manage and test the pressure profile. MPD techniques for real-time pressure estimation were successfully used to obtain critical reservoir information.

This paper offers a comprehensive overview of the sidetrack design, delineating some operational challenges. It also delves into MPD's role in effective equivalent circulating density (ECD), mud weight (MW) management, and tripping strategies needed to comply with regulatory requirements. By presenting key highlights, lessons learned, and recommendations gathered from the operation, this case contributes to the understanding and application of MPD in deepwater exploration.
MPD Well Control During Non-Drilling Operations
Authors: Sanguinetti C. E. , Callerio S. , Atehortua D. , Su D.
Published: September 2024

This study aims to advance the understanding of influx management in Managed Pressure Drilling (MPD) operations. Despite industry efforts to improve kick management using Coriolis flow meters in combination with algorithms for influx volume estimation, and well-established processes for kick circulation, such as Influx Management Envelope (IME) and the MPD matrix, there is still a literature gap regarding kick management with the bit off bottom - a common scenario during tripping, reaming, mud displacement, or running liners.

The identification and control of a kick with the bit off bottom introduces additional complexities, including pipe movement, fluctuating pump pressures, the absence of Equivalent Circulating Density (ECD) readings at the well's total depth (as the bottom hole assembly is off bottom), and temperature effects. These factors may lead to misinterpretations during off-bottom operations, potentially resulting in false alarms. Attempting to control a kick with MPD using drilling procedures may lead to elevated surface pressures or unnecessary and costly killing operations with heavier mud.

This work focuses on analyzing the risks and consequences associated with controlling kicks off bottom with the MPD system while exploring potential solutions, considering both false alarms and true kicks into the wellbore. The analysis is supported by hydraulic simulations and insights from real field experience.

The outcomes of this study will serve as a comprehensive guideline to enhance understanding, mitigate risks, and further development of influx management procedures for MPD, expanding coverage beyond drilling operations to include off-bottom scenarios.
Case Study: First Deepwater Surface Applied Back-Pressure (ABP) MPD Gravel Pack Operation - Design, Execution and Lessons Learned
Authors: Valecillos Juan , Arnone Maurizio , Campbell Patrick
Published: September 2024

Recently an operator embarked in drilling its first Deepwater Appraisal well in an area of the Caribbean Sea. The well objective was to obtain sufficient quality data from target reservoirs to verify the viability of the new asset. The base plan contemplated drilling two legs utilizing a Below Tension Ring (BTR) ABP MPD system for Early Kick and Loss Detection (EKLD) and optimized Bottomhole Pressure (BHP) control. One of the well main objectives was to well test the main reservoir, for which an Open Hole Gravel Pack (OHGP) concept was selected for sand control and a Drill-In Fluid (DIF) system was designed to minimized formation damage. The lower completion run and OHGP job were planned to be executed with a column overbalanced to the pore and stability gradients, however realized bottomhole pressure condition during the drilling phase indicated that a higher effective DHMW was needed to prevent open shales deterioration and hole collapse. The adopted solution to manage the higher-pressure requirement, minimize formation damaged, optimize operation and available resources was to use MPD to run the lower completion and execute the OHGP job. Some of the challenges to overcome included, well control considerations, reverse circulation method, among others.

This paper explores the challenges, planning, execution, and results of the first Deepwater OHGP operation utilizing an ABP MPD system, provides a valuable precedent for future similar applications and presents another example of how the used MPD systems can be extended beyond the drilling phase in well construction operations.
Simplified Deepwater FMCD Strategy
Authors: Fernandes A. A. , Malfitani M. V. B. , Sales I. M. , Vasconcelos K. S. , Pena G. C. M
Published: September 2024

Managed pressure Drilling Surface Back Pressure (MPD SBP) and Mud Cap Drilling (MCD) techniques provides operational flexibility when compared to conventional drilling techniques. By using SBP techniques it is possible to drill wells with narrow operational windows, Fernandes et al (1) and (2) describes the positive impact of having the capability of the maintaining the wellbore pressure within operational limits. However, in some cases, even with a precise control of the annulus pressure it is not possible to drill with returns to the surface.

One typical scenario without operational window on Brazilian offshore wells is fractured zones and karsts reservoirs. In these cases, even with the use of MPD SBP technique, it is not possible to continue drilling without severe or total losses to the formation. An alternative drilling technique for these cases is Mud Cap Drilling (MCD). In MCD, total losses are not controlled, all the fluid pumped through the string and cuttings are injected to the loss zone formation. Surface pressure and mud properties do not define the well pressure. Pore pressure from the loss zone and the friction losses to inject the fluid and cuttings are the governing factors for well pressure. On deepwater application, Pressurized Mud Cap Drilling (PMCD) and Floating Mud Cap Drilling (FMCD) techniques are considered when drilling carbonate reservoirs offshore.

IADC and ABS (3) defines Floating Mud Cap Drilling (FMCD) as a drilling technique used to drill without returns while sacrificial fluid is continuously pumped down drill string and the annulus to avoid all possibility of formation fluid migrating to the surface. Open-hole formation is taking all injected (sacrificial) fluid and drilled cuttings without surface pressure assistance.
Influx Detected and Circulated Out Entirely with MPD on the First Deployment of MPD on Deepwater Rig. A Description of the Well Planning and Execution Process
Authors: Smith T. , Poletzky I. , van Noort R. , Tuckwell N. , Arnone M. , Shah P. , Duong L.
Published: September 2024

A well was to be drilled in the Gulf of Mexico that had limited offset data. Several interpretations from geoscience indicated a level of uncertainty that the operator identified as an ideal scenario for the implementation of the Managed Pressure Drilling (MPD) technology in deepwater of Mexico, with the main purpose of enhancing the ability to manage process safety while drilling with great variations of probable geopressures.

A low intensity 5 barrels kick was identified, controlled, and circulated out entirely through the mud gas separator with the MPD system, utilizing the specific procedure, lessons learned, and best practices identified by the operator and contractors previous experience.

The well was concluded successfully, navigating through the narrow operating window without non-productive time, with effective use of early kick and loses detection (EKLD) implemented by the integrated team of service provider and well-trained rig personnel.

This paper will describe all the phases from MPD deployment on the rig, rig crew training, drills for influxes handling, well planning, and execution.
Çocuk Psikopatolojilerine Algısal Gelişim Perspektifinden Bakış
Authors: Cesur Elifcan , Demirci Yağmur
Published: September 2024

Giriş: Bu araştırmada Psikopatolojik bozukluk gösteren çocukların tanılarına göre duyusal, bilişsel ve duygusal algılama becerilerini belirlemek hedeflenmiştir.
Yöntem: Nedensel karşılaştırma modeliyle yürütülen çalışmanın örneklem grubu amaçlı örnekleme ve kartopu örnekleme yöntemleriyle oluşturulmuştur. Araştırmaya çocukları otizm spektrum bozukluğu, dikkat eksikliği/aşırı hareket bozukluğu, özgül öğrenme bozukluğu ya da anlıksal yeti yitimi tanılı 6-10 yaş arasında çocukları olan ebeveynler ile 6-10 yaş arasında tipik gelişim gösteren çocuğu olan toplam 620 ebeveyn katılmıştır. Veriler Kişisel Bilgi Formu ve Algısal Beceriler Ölçeği kullanılarak toplanmıştır.
Bulgular: Yapılan analizler sonucunda erkeklerin tüm algılama alanlarında kızlardan daha fazla zorlandıkları belirlenmiştir. Algılama alanlarının etkileşim halinde olduğu bulunmuştur. Ayrıca çocukların psikopatolojik tanıları ölçeğin tüm alt boyutları üzerinde anlamlı bir fark oluşturmuştur. Otizm spektrum bozukluğu tanılı çocuklar algısal becerilerde diğer gruplara göre daha fazla desteğe ihtiyaç duyarken, özgül öğrenme bozukluğu tanılı çocuklar daha az desteğe ihtiyaç duymaktadır.
Tartışma: Bulgular Algısal Beceriler Ölçeği’nin tanı grupları arasında kabaca bir sıralama yapabildiğini göstermiştir. Sonuç olarak Algısal Beceriler Ölçeği tıbbı tanılamada kullanılabilecek fonksiyonel bir ölçek olabilir. Bu nedenle ileriki çalışmalarda tıbbı tanılama aşamasındaki çocuklara uygulanarak tanı gruplarına ait kesim puanları hesaplanabilir.
Additively Manufactured Collector-Detector Device for Explosive Analysis Using Recycled PLA Filament Loaded with Carbon Black and Graphite
Authors: M. C. Souza Maria , P. Siqueira Gilvana , G. Rocha Raquel , D. Crapnell Robert , H. P. Santana Mário , M. Richter Eduardo , E. Banks Craig , A. A. Muñoz Rodrigo
Published: September 2024

We report the electrochemical potential of conductive filaments produced with recycled polylactic acid (rPLA) alongside a mixture of graphite (Gpt) and/or carbon black (CB) and castor oil to create an electrode ready-to-use. Additively-manufactured electrodes (AMEs) were compared with commercial-conductive filament composed of PLA and CB. The Gpt-CB-rPLA and CB-rPLA sensors showed lower charge-transfer resistance (Rct) and a greater heterogenous rate constant, k0 , (Rct = 1040 ± 50 Ω and 1810 ± 30 Ω and k0 = 6.91 (± 0.58) ×10-3 and 5.31 (± 0.40) × 10-3 cm s-1, respectively) compared to the sensor from the commercial filament (Rct = 9620 ± 280 Ω and k0 = 3.62 (± 0.38) ×10-3 cm s-1). The electrochemical response of [Fe(CN6)]3-/4- displayed a peak-to-peak separation of 180 ± 8 mV (Gpt-CB-rPLA) and 240 ± 6 mV (CB-rPLA) compared to commercial AME (740 ± 10 mV), without any surface treatment. The filaments were used to create a 2,4,6-trinitrotoluene (TNT) detection platform with linear range of 5-20 and 5-100 µmol L-1 for Gpt-CB-rPLA and CB-rPLA, respectively. The collector-detector device was applied for the analysis of a blast simulation. Finally, it is worth noting that the results obtained are without electrode treatment/activation, indicating that the rough surface of the additively manufactured electrode is an additional feature of the device for collecting explosive residues, simply by rubbing the additively manufactured platform on different surfaces in crime scenarios.
АКЦЕНАТ ИМЕНИЦА НА -АЊЕ У ГОВОРУ СПИКЕРА И РЕПОРТЕРА РАДИО-ТЕЛЕВИЗИЈЕ РЕПУБЛИКЕ СРПСКЕ И У РЈЕЧНИЦИМА СРПСКОГ ЈЕЗИКА
Authors: М. Цукут Слађана
Published: September 2024

У овом раду анализира се акценатска варијантност фреквентних именица на -ање: васпитање, поштовање, пословање, именовање, образовање, организовање, стабилизовање, легализовање, локализовање и сл. на материјалу забиљеженом према изговору спикера и репортера информативног програма Радио-телевизије Републике Српске, који указује на то да наведене именице могу имати двије или три акценатске варијанте. Преглед њихових акценатских типова и акценатских варијаната у Обратном рјечнику (ОР), провјерених у РМС и РСЈ, показује да око 280 ових именица има двије акценатске варијанте. Анализа грађе показује да се акценатске варијанте забиљежене на телевизији само дјелимично поклапају са рјечничким варијантама, као и да учесталост варијантности код појединачних примјера може драстично варирати.
DEVELOPING A COLLOCATION LEARNING MANAGEMENT MODEL FOR ENHANCING ELF ORAL COMMUNICATION IN THAILAND
Authors: Srisapoom Montaya , Chano Jiraporn
Published: September 2024

The significance of collocation in English as a Lingua Franca (ELF) for oral communication has been largely neglected. This study aims to develop a collocation learning management model that would enhance the oral communication skills ofEnglish ELF university students in Thailand. The study provides insights. Initially, the main challenges discovered were content enhancement, limited activities and learning arrangements, low motivation, and non-cooperative conduct. A learning managementmodel for English collocations was also introduced to address the issues. The model's theoretical concepts, objectives, learning management phases, social system, reaction principle, and support system have been identified. Furthermore, the model improved students' listening, speaking, and basic language skills in higher education. Additional investigation is required to ascertain the enduring scholarly achievement of this model when combined with other pedagogical methodologies and its integration and practical application across all language skills for prospective utilisation in comparable educational settings.
WITHIN THESE FOUR WALLS: THE PERILOUSNESS OF ELUSIVE GUARD RAILS AND IMPERMANENCE OF SAFETY
Authors: Z. Muhić Emir
Published: September 2024

Cognition for better or worse does appear to reside at the feet of spatiality, which in turn constitutes one of the more ossified keystones of reality-carving perception mechanisms the humanoid-coded cohort is invariably endowed with, and it bears repeating that this constellation of epistemic mechanics abides in no small measure owing to societal and culturally-tinted mores incessantly reiterated to the brink of relegation to a metanoia contrived in a borderline ad nauseum fashion. Therein lies the hindrance to one-to-one or at the very least easily elicited correspondence in the transposition and limpid demarcation between structurally inherited and transgenerationally mooted and affirmed cognitive devices garnered from a relatively unbiased source and telegraphed with a gloss of fear into a more pliant and individuated target domain. The unremitting character of moulding an intertextual and ostensibly erroneous meaning-sensitive system is equal parts the north star and a murky nor’easter blanketing the way forward and out. The paper, notwithstanding said constraints, posits an amalgamated theoretical and analytical matrix attuned to the “what works principle” and at the same intent lays the groundwork for a dry-run approach to decipherment at large. This hybridised analytical tool is provisionally put on a metaphorical beta blocker and remains to be further expatiated on and deployed in force on a more comprehensive corpus, however the paper shines a light on cognition, culture and along with grammaring as the “fifth” skill and brings it into synchronous orbit. It would not be misleading to say that this is a spark plug teasing an upcoming in-depth volume. It follows that since the unequivocal assertions concerning cultural and cognitive negotiations populating the domain at the heart of both cogitation and consequent meaningful and workable output show no signs of abating, this zetetic line ought to be further pursued and hopefully illuminated. The propositions were put to the test in an empirically attested and cogently targeted sample study of media-propelled and licenced messaging armature. Last and by no means least, this analytical amalgam seeks to broach the through line of safety, health and wellbeing perpendicular to the shielding tools meant to safeguard their sustained preservation.
ШЕКСПИР И ИНТЕРМЕДИЈАЛНОСТ НА ПРИМЕРУ ТЕЛЕВИЗИЈСКЕ СЕРИЈЕ ПРАЋКЕ И СТРЕЛЕ
Authors: М. Андрејевић Ана
Published: September 2024

Шекспирова дела историјски припадају елитној култури, али покушаји да се она прилагоде и интегришу у популарну културу увек су актуелни. Његови наративи имају толики значај за светску културу да се спонтано генеришу у многобројне адаптације и наставке ефектом лавине (snowball effect), у значењу Рајанове, како у оквиру истог медија тако и у другим медијима. У почетним фазама прераде Шекспирових дела адаптације су биле интрамедијалне. Међутим, оне се од романтизма реализују и у другим медијима, односно долази до ремедијације ради осавремењивања и контекстуализације. У доба електронских и нових медија Шекспирове драме се преобликују кроз различите медијске платформe, а познати садржаји транспонују се на разнолике начине. Многобројне интермедијалне и трансмедијалне адаптације присвајају препознатљиве топосе, ликове или радње и граде нове наративе који често немају уметнички карактер. Насупрот томе, канадска телевизијска серија Праћке и стреле (Slings and Arrows) издваја се наглашавањем трајне уметничке вредности Шекспировог наратива у сваком медију. Три сезоне серије приказују изазове фикционалног позоришта, док припрема продукције три велика Шекспирова комада: Хамлета, Магбета и Краља Лира. У том контексту, сведоци смо процеса ремедијације који подразумева интеграцију једне медијске форме у другу. Представљањем основних карактеристика позоришта и истицањем његове уметничке природе, серија Праћке и стреле истовремено постаје поучни и забавни медијски формат. Циљ рада јесте да расветли начин и ниво успешности процеса ремедијације у контексту Шекспировог аутентичног наратива. Истраживачки метод ослања се на теорију ремедијације Болтера и Грусина, као и на концепте интермедијалности и трансмедијалности Рајанове и Џенкинса.
INTERNATIONAL EDUCATION UNDER THE MICROSCOPE
Authors: M. Prodanović Marijana
Published: September 2024

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О СВЕТ(Л)ОСТИ ОГЊИШТА, НЕУГАСИВОЈ
Authors: Petaković Slavko
Published: September 2024

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Systematic review of the uses of Cortaderia selloana (Poaceae), an invasive plant
Authors: Teixeira Jéssica , Sousa Mariana , Cruz Agostinho
Published: September 2024

Background and Aims: Cortaderia selloana, commonly known as Pampas Grass, manifests as an invasive plant across numerous countries with predominant studies focused on its control measures (physical, biological, and chemical approaches). Native to South America, this perennial tussock grass negatively impacts economic, environmental, and human health. This study aims to explore the diverse uses of Cortaderia selloana in geographical, cultural and ecological contexts, to provide insights into its applications, and to contribute to socio-economic and ecological understanding.
Methods: This study comprises a systematic literature review based on the PRISMA 2020 guidelines. The search was conducted in EBSCOhost, ScienceDirect and Web of Science using the search question “("Cortaderia selloana") AND ("use" OR "purpose") NOT (“control”)”. Two researchers independently reviewed the titles and abstracts, applying predefined inclusion and exclusion criteria and extracting data on various aspects covered in the selected studies.
Key results: A total of 88 articles were retrieved of which 16 were included in this systematic review. This study described diverse applications attributed to Cortaderia selloana, including wastewater treatment, composite synthesis, traditional medicine, bioremediation, biorefining, product development in the automobile industry and decoration. The utilization of this invasive species demonstrated socio-economic and environmental benefits, providing a novel perspective on transforming something harmful into a resource with various applications. Furthermore, the necessity for more research is emphasized, to enhance understanding of known applications and explore new potential uses. This study's main limitation is that it only includes peer-reviewed articles from selected databases.
Conclusions: This research provides valuable insights into the diverse uses of Cortaderia selloana across geographical, cultural, and ecological contexts. These findings underscore the importance of considering both the beneficial applications and the challenges posed by this invasive species in order to inform balanced and sustainable management practices.
Exact solutions of the nonlinear space-time fractional Schamel equation
Authors:   Department of Mathematics, College of Science, Northern Border University, Arar, Saudi Arabia, Gumma Elzain A. E. , Hassaballa Abaker A. ,   Department of Mathematics, College of Science, Northern Border University, Arar, Saudi Arabia, Birkea Fathea M. O. ,   Department of Mathematics, College of Science, Northern Border University, Arar, Saudi Arabia, Adam Ahmed M. A. ,   Department of Mathematics, College of Science, Northern Border University, Arar, Saudi Arabia, Satty Ali ,   Department of Mathematics, College of Science, Northern Border University, Arar, Saudi Arabia, Abdel-Salam Emad A. B. ,   Department of Mathematics, Faculty of Science, New Valley University, Elkharga, Egypt, Yousif Eltayeb A. ,   Department of Applied Mathematics, Faculty of Mathematical Sciences and Informatics, University of Khartoum, Khartoum, Sudan, Nouh Mohamed I. ,   Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG), Cairo, Egypt
Published: September 2024

This study focuses on the nonlinear space-time behavior of a plasma system made up of electrons, positive ions, and negative ions using the fractional Schamel (FS) equation. The main goal is to find exact solutions to the nonlinear FS equation by applying the extended hyperbolic function (EHF) method. The study examines how the fractional order affects the phase velocity, amplitude, and wave width of solitary wave solutions. Different exact solutions were found based on various values of the fractional order. Graphical representations are included to show the physical properties of these solutions. Overall, the results demonstrate that the EHF method is effective and reliable for finding exact solutions to the nonlinear FS equation.
A Behavior-Based Model to Validate Electronic Systems Designed to Collect Patient-Reported Outcomes: Model Development and Application (Preprint)
Authors: Attamimi Sultan , Marshman Zoe , Deery Christopher , Radley Stephen , Gilchrist Fiona
Published: September 2024

BACKGROUND

The merits of technology have been adopted in capturing patient-reported outcomes (PROs) by incorporating PROs into electronic systems. Following the development of an electronic system, evaluation of system performance is crucial to ensuring the collection of meaningful data. In contemporary PRO literature, electronic system validation is overlooked, and evidence on validation methods is lacking.

OBJECTIVE

This study aims to introduce a generalized concept to guide electronic patient-reported outcome (ePRO) providers in planning for system-specific validation methods.

METHODS

Since electronic systems are essentially products of software engineering endeavors, electronic systems used to collect PRO should be viewed from a computer science perspective with consideration to the health care environment. On this basis, a testing model was blueprinted and applied to a newly developed ePRO system designed for clinical use in pediatric dentistry (electronic Personal Assessment Questionnaire-Paediatric Dentistry) to investigate its thoroughness.

RESULTS

A behavior-based model of ePRO system validation was developed based on the principles of user acceptance testing and patient-centered care. The model allows systematic inspection of system specifications and identification of technical errors through simulated positive and negative usage pathways in open and closed environments. The model was able to detect 15 positive errors with 1 unfavorable response when applied to electronic Personal Assessment Questionnaire-Paediatric Dentistry system testing.

CONCLUSIONS

The application of the behavior-based model to a newly developed ePRO system showed a high ability for technical error detection in a systematic fashion. The proposed model will increase confidence in the validity of ePRO systems as data collection tools in future research and clinical practice.
Pantalla. Procesos sonoros y musicales en Medellín 1953-1957
Authors: López Cabrera Heyder
Published: September 2024

Utilizando el semanario Pantalla como fuente principal, en este libro se analizarán los procesos de mediación tecnológica de la música popular y las culturas de consumo musical a mediados del siglo XX en Medellín e Hispanoamérica, enfocados en la radio, la prensa y la industria discográfica, buscando reconstruir las redes de actores y el papel que medios, agentes e instituciones jugaron en relación con las culturas de consumo de esta música en Medellín.
Técnicas de elicitación de formación personal para su uso en estadística bayesiana
Authors: Correa Morales Juan Carlos , Barrera Causil Carlos Javier
Published: September 2024

El objetivo de este trabajo, por lo tanto, será presentar diferentes formas de cuantificar información personal de forma que dispongamos de metodologías empíricas claras y que puedan ser replicadas en casos donde sea necesario.
Narrativas ambientais e educomunicação: o cinema como estratégia para a compreensão ambiental
Authors:   , Souza Gisele Cristina Gabriel de
Published: September 2024

Ao tomar como fio condutor o emprego do cinema em processos educomunicativos, esta pesquisa tem como foco as relações entre produções cinematográficas, comunicação e educação, interligadas às questões ambientais. Assim, o problema pode ser enunciado a partir da seguinte pergunta: como as narrativas podem auxiliar as práticas educomunicativas, supondo-se que possam oferecer uma abordagem complexa dos fenômenos? A pergunta parte da hipótese de que as narrativas podem contribuir para uma educomunicação sensível, capaz de comunicar por meio de uma linguagem poética e ampliar a maneira de como percebemos o mundo ao nosso redor. E, se assumida no cotidiano escolar, pode ser uma grande aliada frente às questões caras à educação e à comunicação ambiental. O objetivo geral é compreender os processos comunicacionais estabelecidos em produções cinematográficas que abordam as questões ambientais, bem como refletir sobre o uso destes recursos em processos educomunicativos. Como objetivos específicos: a) verificar as estratégias utilizadas para a construção destas narrativas, com ênfase na apuração sobre os elementos poéticos, possivelmente presentes na estrutura imagética, sonora e verbal; b) apresentar uma tipologia de narrativas para a construção de uma educomunicação pelo viés do sensível. Em busca de compreender como se configuram tais narrativas – e explicar sua inserção em um ambiente pedagógico voltado para o exercício crítico e criativo, seremos amparados por autores como: Míriam Cristina Carlos Silva; Edgar Morin; Octavio Paz; Walter Benjamin; Paulo Freire; Adilson Citelli; Ismar de Oliveira Soares; Ailton Krenak e Marcos Reigota. Além disso, com o intuito de contribuir para a reflexão do processo de ensino-aprendizagem, uma proposta didática é apresentada. A presente pesquisa se justifica no atual cenário social, no qual a questão ambiental tornou-se um problema de responsabilidade individual e coletiva, pois até aqui não fomos capazes de equilibrar nossa existência com a utilização dos recursos finitos disponíveis na natureza, e, em geral, nos relacionamos com o planeta de forma destrutiva. Neste sentido, ao tratar as questões ambientais a partir da educomunicação, pode-se apresentar ferramentas que se inserem no conjunto maior da educação com o objetivo de transformações sociais, afinal, trata-se de um papel ético na comunicação contemporânea. As narrativas fílmicas apresentadas neste trabalho, dada a sua complexidade poética e a forma sensível como tratam a questão ambiental, por meio do cinema, podem contribuir para uma educomunicação sensível. O trabalho demonstra que é possível, a partir do cinema e da comunicação sensível, aliar a educomunicação às discussões ambientais, por meio de sequências didáticas a serem trabalhadas no diálogo entre professores e alunos, levando-se em conta o fundamento da comunicação como um processo de interação, portanto, de construção intersubjetiva de saberes.
Making a Difference in Challenging Urban Schools: Successful Principals
Authors: Michalak Joanna M.
Published: September 2024

The article reports upon findings from four multiple-perspective case studies of successful principals in challenging urban contexts. Each principal was described as making a significant difference to the quality of school education. The findings are obtained from the Polish part of the ‘Leading Schools Successfully in Challenging Urban Contexts’: Strategies For Improvement’ project. The research design consisted of two overlapping phases: the first was a literature review to ascertain ‘what is known’ about the nature and effects of leadership in challenging urban contexts; the second involved a case-study approach, collecting data from 36 schools to explore the leadership strategies that are used by successful principals of schools that face challenging urban contexts. The analysis of the cases identified that there were several interconnected strategies that are not only important, but essential for leadership success in these schools. They are related to setting the directions, developing people, redesigning the organisation and changing the culture of the school. Each of them encompasses more specific competencies, attitudes and considerations.
Situated Learning in Young Romanian Roma Successful Learning Biographies
Authors: Nistor Nicolae , Stanciu Dorin , Vanea Cornelia , Sasu Virginia Maria , Dragotâ Maria
Published: September 2024

European Roma are often associated with social problems and conflicts due to poverty and low formal education. Nevertheless, Roma communities traditionally develop expertise in ethnically specific domains, probably by alternative, informal ways, such as situated learning in communities of practice. Although predictable, empirical evidence of Romani situated learning practice and its socio-cognitive effects is scarce. This qualitative study with quantitative components outlines knowledge domains, social contexts, and the initiation and evolution of situated learning, along with their occurring frequencies, in eighteen biographies of young Romanian Roma students, from which four cases are presented in detail. The study suggests that situated learning is omnipresent in successful Roma learning biographies, and has positive, cognitive and social effects, such as expertise and social skills, which may prevent social exclusion and stigma. The conclusions are relevant for educational research, and for educators and policy makers involved in social work with Roma ethnics.
Teacher Change in an Era of Neo-Liberal Policies: A Neo-Institutional Analysis of Teachers' Perceptions of Their Professional Change
Authors: Ramberg Magnus Rye
Published: September 2024

The aim of this article is to explore how neo-institutional theory may be applied as an analytical framework to investigate the relationships between teachers' perceptions on their professional change on the one hand, and the numerous change efforts embedded in recent neo-liberal educational policies in Norway on the other. Based on biographical interviews with Norwegian teachers, it is argued that the dynamics of change can be investigated in light of teachers' institutionalised practices within a certain set of governing mechanisms including regulative rules, norms and cultural-cognitive beliefs. The findings suggest that vital, regulative elements in recent neoliberal policies have managed to penetrate the teachers' perceptions of their classroom practices, in a process that is framed by teachers' pre-existing normative values and the cultural scripts guiding their practices. This article concludes that the neo-institutional analytical framework may serve as a sound approach to investigate and compare how issues of teacher change are unfolding across European education systems and policies.
Prevalent Metformin Use in Adults With Diabetes and the Incidence of Long COVID: An EHR-Based Cohort Study From the RECOVER Program
Authors: Johnson Steven G. , Abedian Sajjad , Stürmer Til , Huling Jared D. , Lewis V Colby , Buse John B. , Brosnahan Shari B. , Mudumbi Praveen C. , Erlandson Kristine M. , McComsey Grace A. , Arnold Jonathan , Wiggen Talia D. , Wong Rachel , Murphy Shawn , Rosen Clifford , Kaushal Rainu , Weiner Mark G. , Bramante Carolyn ,   RECOVER PCORnet EHR Cohort and the N3C Consortium
Published: September 2024

OBJECTIVE

Studies show metformin use before and during SARS-CoV-2 infection reduces severe COVID-19 and postacute sequelae of SARS-CoV-2 (PASC) in adults. Our objective was to describe the incidence of PASC and possible associations with prevalent metformin use in adults with type 2 diabetes mellitus (T2DM).

RESEARCH DESIGN AND METHODS

This is a retrospective cohort analysis using the National COVID Cohort Collaborative (N3C) and Patient-Centered Clinical Research Network (PCORnet) electronic health record (EHR) databases with an active comparator design that examined metformin-exposed individuals versus nonmetformin-exposed individuals who were taking other diabetes medications. T2DM was defined by HbA1c ≥6.5 or T2DM EHR diagnosis code. The outcome was death or PASC within 6 months, defined by EHR code or computable phenotype.

RESULTS

In the N3C, the hazard ratio (HR) for death or PASC with a U09.9 diagnosis code (PASC-U09.0) was 0.79 (95% CI 0.71–0.88; P < 0.001), and for death or N3C computable phenotype PASC (PASC-N3C) was 0.85 (95% CI 0.78–0.92; P < 0.001). In PCORnet, the HR for death or PASC-U09.9 was 0.87 (95% CI 0.66–1.14; P = 0.08), and for death or PCORnet computable phenotype PASC (PASC-PCORnet) was 1.04 (95% CI 0.97–1.11; P = 0.58). Incident PASC by diagnosis code was 1.6% metformin vs. 2.0% comparator in the N3C, and 2.1% metformin vs. 2.5% comparator in PCORnet. By computable phenotype, incidence was 4.8% metformin and 5.2% comparator in the N3C and 24.7% metformin vs. 26.1% comparator in PCORnet.

CONCLUSIONS

Prevalent metformin use is associated with a slightly lower incidence of death or PASC after SARS-CoV-2 infection. PASC incidence by computable phenotype is higher than by EHR code, especially in PCORnet. These data are consistent with other observational analyses showing prevalent metformin is associated with favorable outcomes after SARS-CoV-2 infection in adults with T2DM.
L’usage théorique de la littérature pour penser les transclasses
Authors: Jaquet Chantal
Published: September 2024

Il peut paraître curieux de prendre appui, comme je l’ai fait dans Les transclasses ou la non-reproduction (Jaquet 2014), sur des romans, empruntés principalement à la littérature française et américaine des XIXe et XXIe siècles, dans le cadre d’une démarche philosophique ayant pour objet d’analyser les causes et les effets des trajectoires des individus qui, seuls ou en groupe, passent d’une classe à l’autre. Les transclasses, qui, comme leur nom l’indique, franchissent les barrières de classe, se présentent comme des exceptions ou des écarts par rapport à la théorie de la reproduction sociale et devraient donc logiquement être appréhendés dans ce cadre de pensée mis en place par Marx et infléchi notamment par Althusser (2011) et Bourdieu (1970). Pourquoi convoquer des exemples littéraires et mobiliser des fictions au sein d’une réflexion philosophique qui porte sur un phénomène social réel, alors que l’on s’attendrait plutôt à trouver dans le livre des études de cas et des enquêtes statistiques fondées sur une approche sociologique? La littérature semble a priori déplacée dans ce contexte de pensée, puisqu’en aucun cas l’imaginaire ne saurait tenir lieu de réalité. C’est la raison pour laquelle il est nécessaire de revenir sur le statut de la littérature et de son usage dans cette réflexion sur les transclasses afin d’en mesurer la pertinence et l’intérêt.
Causales del multiempleo de los docentes de Ciencias Administrativas y Contables. Un caso en Medellín
Authors: Rojas Restrepo Farley S. , Vélez Acevedo Natalia María , Rodríguez Leidy Patricia
Published: September 2024

El multiempleo o trabajo fragmentado es un fenómeno de carácter mundial que se ha desarrollado históricamente y tiene como propósito principal mejorar los ingresos económicos, en la mayoría de los casos, así como tener varias opciones de empleo, que desde la percepción particular puede generar mayores oportunidades de estabilidad laboral. Esta investigación pretende evidenciar las causas que llevan a los docentes de la Universidad Católica Luis Amigó a emplearse a través del multiempleo. La metodología bajo un enfoque mixto con un alcance analítico soportado a través de la aplicación de un cuestionario semiestructurado de recolección de información y una triangulación de experiencias vividas por parte de los docentes de la facultad. Se puede afirmar que una de las causas con mayor peso que manifestaron los docentes es que el 50% de los consultados no considera que tener dos o más empleos obedece a la desregulación en las normas laborales que vulnera las garantías para los trabajadores, también es relevante mencionar las razones por las cuales labora en más de una institución educativa y/o empresa y el 64.3% de los docentes afirma que es por factores económicos, el 32.1% por que su familia depende económicamente de él y el 21,4% por el alto costo de vida.
Tratamiento especial en la contabilidad de los equipos de fútbol colombiano
Authors: Arboleda Esaa Aleksandryx , Jaramillo María De Los Ángeles , García Goez Mateo , Rodríguez Piñeros Leidy
Published: September 2024

La contabilidad deportiva es esencial para la gestión financiera efectiva, el cumplimiento legal y fiscal, la transparencia y la rendición de cuentas, la toma de decisiones informadas y la mejora de la rentabilidad de los equipos y organizaciones relacionadas con el deporte. Por ende, esta investigación se centró en identificar el tratamiento contable en los equipos de fútbol colombiano. La metodología abordó un enfoque cualitativo en el que la recopilación de datos se desarrolló mediante dos técnicas: el empleo de una matriz cuantitativa para caracterizar y comparar el manejo de los registros contables; y la realización de entrevistas a los contadores de dos clubes deportivos. Los resultados evidencian particularidades en dicho registro, como la valorización de activos intangibles representados en los derechos de imagen, los contratos de patrocinio y las marcas, así como la adecuada contabilización de los costos relacionados con los contratos de los jugadores. Por esto, es fundamental fortalecer los estudios en el tratamiento contable en este ámbito para garantizar la transparencia financiera, mejorar la gestión y la toma de decisiones informadas.
TÜRKİYE’DE MATEMATİK ÖĞRENME ORTAMLARINDA DERS KİTAPLARININ KULLANIMI
Authors: Galiç Selen , Urhan Selin , Dost Şenol
Published: September 2024

Matematik ders kitapları, bir ülkenin matematik kültürünü ve matematiğe yaklaşımını yansıtan ve sınıflarda etkili kullanılması beklenen en temel öğretim materyalidir. Bu çalışmada, Türkiye’de öğrenme ortamlarında öğretmenlerin ortaokul ve ortaöğretim matematik ders kitaplarını dersin hangi aşamalarında ve hangi nedenlerle kullandıklarını/kullanmadıklarını belirlemeye yönelik nitel bir araştırma yapılmıştır. Türkiye’de aktif olarak görev yapan 174 ortaokul öğretmeni ve 103 ortaöğretim matematik öğretmeninden çoktan seçmeli ve açık uçlu sorulardan oluşan bir anket aracılığıyla toplanmıştır. Sonuçlar, matematik öğretmenlerinin ders kitaplarını daha ziyade öğretim programındaki kazanımları öğrenmek ve ödev vermek amacıyla kullandıklarını; çoğunlukla ders planı hazırlama ve dersin değerlendirme aşamasında ders kitaplarından yararlandıklarını göstermektedir. Mevcut matematik ders kitaplarının öğretmenlerin görüşleri doğrultusunda gözden geçirilmesi önerilmiştir.