bluuebunny/crossref_metadata_2025 huggingface dataset:
An Inquiry-Based Activity for Investigating the Effect of Climate Change on Phenology Using the R Programming Language
Authors: Austin Matthew W. , Miller-Struttmann Nicole E.
Published: April 2024

Engaging students in research is increasingly recognized as a valuable pedagogical tool that can augment student learning outcomes. Here, we present an original activity that utilizes research as pedagogy to teach upper-division college students about phenological responses to climate change. By studying phenological responses in multiple species, this activity emphasizes interspecific variability in responses to a changing climate (i.e., that not all species respond in the same way), while demonstrating the relationship between environmental and phenotypic variability. In this activity, students collect data from herbarium specimens of spring ephemerals native to North America and are tasked with formulating and testing hypotheses about how the day of year that a species’ flowering occurs (i.e., flowering phenology) has been affected by climate change. To accomplish this, students perform linear regressions using the R programming language—including data exploration and ensuring the dependent variable follows a normal distribution—and subsequently present their results via oral presentation. We taught this activity as a three-unit lab in an upper-division ecology course and observed quantifiable improvement in student learning outcomes. While designed as a three-unit, upper-division lab, this activity can be modified for other educational levels, blocks of time, and/or as a flipped classroom activity. Through this activity, students are provided with the opportunity to learn about the scientific method, biological collections, linear regressions, the R programming language, and scientific communication. Changes to flowering time are one of the most conspicuous effects of climate change, thus presenting an ideal topic for engaging students in biological inquiry.
History beyond Recovery: Julius Eastman and the Challenge of the Heterological
Authors: Mendez Matthew
Published: April 2024

This article examines the improvisative activities of the gay Black composer-vocalist Julius Eastman (1940–90), whose life and works have lent themselves in recent years to efforts to diversify histories of experimentalism and new music. These initiatives have obscured the fact that Eastman repeatedly engaged with jazz improvisation, a subject about which the secondary literature is mostly silent. Guided by George Lewis’s theorization of “Afrological” and “Eurological” improvisative modes, I examine a series of moments in Eastman’s improvisative trajectory that resist subsumption under either pole. Inasmuch as his improvisative work turned on an identity-affirming, self-expressive “Romantic ideal” that was in fashion with neither Eurological, post-Cagean experimentalism nor Afrological “loft” jazz, his engagements with both tended to lead to impasse. This suggests the utility of a third term, the “heterological.” I argue that Eastman’s heterological improvisative practice followed the logic of disidentification, or minoritarian recodings of hegemonic, exclusionary social texts. The article also explores the progressive radicalization of Eastman’s heterology, and his eventual renunciation of music-improvisative identity work. By the mid-1980s, Eastman was instead embracing practices of self-shattering and sacrifice, one goal of which was to place himself, literally, beyond historical recovery. The transgressive heterology of his personal life, and his profound indifference to archivization, pose deep challenges to musicology’s impulse to “recover” marginalized figures. Eastman’s ultimate rejection of futurity unsettles the grounds for meaningful historiographical identification with his past, since it is by no means clear that our present is any future he would have ever wished to inhabit.
Unionsrechtliche Pflicht der Zahlungsdienstleister zum Kundenidentifikator-Namensabgleich – Ökonomische Implikationen und rechtliche Friktionen
Authors: Fritz Dennis
Published: April 2024

Schon seit der Umsetzung der ersten Zahlungsdiensterichtlinie (PSD) in nationales Recht sind Zahlungsdienstleister nicht mehr verpflichtet, im Überweisungsverkehr einen Kontonummer-Namensabgleich durchzuführen. Mit der Verordnung zur Änderung u. a. der SEPA-Verordnung und – sollte der Unionsgesetzgeber diese ebenfalls verabschieden – der Verordnung über Zahlungsdienste im Binnenmarkt (PSR) ist ein grundlegender Wandel im Zahlungsdiensterecht verbunden. Danach sind nämlich Zahlungsdienstleister in der Regel verpflichtet, vor der Autorisierung eines Überweisungsauftrags den vom Zahler angegebenen Kundenidentifikator und Namen abzugleichen. Der Beitrag befasst sich mit den genannten europäischen Gesetzgebungsakten. Dabei geht es zum einen um ökonomische Erwägungen, die die Europäische Kommission zu ihren Vorschlägen veranlasst haben. Zum anderen sind die mit den derzeitigen Fassungen verbundenen rechtlichen Probleme zu untersuchen.
Cross Platform Waste Reuse, Reduce And Recycle Management Application With Prototyping Methodology
Authors: Setiawan Esther Irawati , Hartono Patrick , Vu Tong Nam Tuan , Halim Kevin Jonathan , Ferdinandus F. X. , Santoso Joan
Published: April 2024

The use of plastic bags by the public as containers for shopping goods is very high. People often throw away plastic waste carelessly, causing pollution everywhere. The biggest problem with the lack of recycling action lies in the lack of public awareness of the importance of implementing 3R (Reduce, Reuse, Recycle). People are less motivated to do 3R, one of which is because there are no rewards after doing 3R. This research develops an application provides rewards to the community for using Eco-Green Bags as an alternative to plastic bags. This research application has a system that makes it easier for people to carry out 3R. This proposed framework application uses the React Native framework for creating mobile apps and Next.JS for creating admin websites and APIs. With the React Native framework, application performance will be faster and smoother for users. The Next.JS framework allows developers to have a very clear project structure, because Next.JS uses file-based routing. With this research, it is hoped that people can be even more motivated to carry out 3R. The community can participate easily in implementing 3R without any coercion but through the community's own initiative. In this way, the application can be a real supporter of society in implementing 3R and avoiding the use of plastic bags which are also contributors to environmental pollution.
Análisis de las fuerzas competitivas para los cacaocultores de San José de Cúcuta, Colombia
Authors: Otero-Gómez Miller Eduardo , Villamizar-Quiñonez César , Cancino Susan
Published: April 2024

Introducción. La competitividad mide la capacidad de una empresa u organización de producir y comercializar un bien o producto con mayor eficiencia y eficacia en comparación con otros competidores. Objetivo. Analizar las fuerzas competitivas relacionadas con la productividad y comercialización del grano de cacao por parte de los cacaocultores de San José de Cúcuta y aportar información para futuras investigaciones, encaminadas hacia el mejoramiento delsector cacaotero. Materiales y métodos. La investigación fue desarrollada en el municipio de San José de Cúcuta en las veredas de Guaramito, Matecaña, La Floresta, Banco de Arena y Palmarito, Colombia, durante el año 2022. La población objeto de estudio, fueron productores de cacao residentes en la zona rural del municipio. El muestreo fue de tipo no probabilístico, lo que representó una muestra por conveniencia, allí se lograron identificar 86 productores de cacao que estuvieron en disposición para responder la encuesta. La modalidad fue observacional de tipo cuantitativo. Para el análisis  de la información, se aplicaron métodos estadísticos descriptivos e inferenciales. Resultados. Con relación a la capacidad de negociación de los productores sobre los precios del grano, el 34,88 % consideró que es muy bajo. Para el caso de acceso a la tecnología para el cultivo, el 47,67 % expresó como bajo. Referente a costos de producción el 45,35 % respondieron que son altos. En cuanto a productos sustitutos el 84,88 % de los encuestados considera que existe una amenaza de nivel medio a alto muy alto. Conclusiones. En el municipio de San José de Cúcuta, la producción de cacao es una actividad de importancia productiva y socioeconómica. Respecto al poder de los comercializadores, los cacaocultores no ejercen ningún efecto positivo sobre los precios del grano producido  en la zona de estudio, por el contrario, deben someterse a lo impuesto por las grandes industrias del país.
Crecimiento y absorción de nutrimentos en pitahaya (Hylocereus costaricensis y H. monocanthus) de Costa Rica
Authors: Garbanzo-León Gabriel , Vargas-Rojas Jorge Claudio , Vega-Villalobos Edgar Vidal
Published: April 2024

Introducción. El cultivo de pitahaya (Hylocereus costaricensis y H. monocanthus) está en aumento en Costa Rica, pero carece de información técnica para su manejo, en las necesidades nutricionales, momentos de fertilización y el comportamiento del crecimiento. Objetivo. Cuantificar y modelar el crecimiento y la absorción de nutrimentos de pitahaya (H. costaricensis y H. monocanthus) en condiciones del trópico estacional seco de Costa Rica. Materiales y métodos. La investigación se realizó durante el periodo de 2017 – 2020 en Guanacaste, Costa Rica. Se muestrearon plantas a los 76, 165, 308, 450, 607, 903, 1249 y 1706 días después de siembra (DDS) y 205 frutas . Se cuantificó la materia seca y se calculó la absorción de N, P, Ca, Mg, K, S, Fe, Cu, Zn, Mn y B. Se ajustaron dos modelos logísticos para determinar la absorción de nutrientes y se calibraron regresiones lineales en fruta fresca. Resultados. Los requerimientos nutricionales del cultivo fueron (kg ha-1): 137 N, 32 P, 327 K, 63 Mg, 32 S, 1,60 Zn, y 0,21 B en 3000 planta/ha. El modelo logístico de mejor ajuste (RMSE = 0,09) estimó de forma precisa la absorción de N, P, Ca, S, Zn y B. El modelo de regresión lineal tuvo alta capacidad predictora (R2 > 0,85) para los requerimientos de N, P, K, Mg, S en fruta. Conclusión. Los modelos logísticos tuvieron alta precisión para modelar de manera determinística la absorción de nutrientes en plantas de pitahaya. Además, se logró cuantificar y modelar de forma eficiente el comportamiento nutricional de planta de pitahaya en condiciones de trópico estacional seco de Costa Rica, lo que proporciona información esencial para los programas de fertilización del cultivo.
Clinical results of enhanced recovery after surgery in children after pectus excavatum repair
Authors:   Bogomolets National Medical University, Kyiv, Ukraine, Ovdii M.O. , Kryvopustov S.P. ,   Bogomolets National Medical University, Kyiv, Ukraine, Saltykova G.V. ,   Bogomolets National Medical University, Kyiv, Ukraine,, Pismennyi V.D. ,   Bogomolets National Medical University, Kyiv, Ukraine, Boyko N.S. ,   Bogomolets National Medical University, Kyiv, Ukraine, Lomaka V.V. ,   National Children’s Specialized Hospital OKHMATDYT, Kyiv, Ukraine, Kopyl L.G. ,   National Children’s Specialized Hospital OKHMATDYT, Kyiv, Ukraine
Published: April 2024

The funnel-shaped deformity of the chest is the most common defect of the chest, which can cause cosmetic problems, but also a decrease in tolerance to physical activity, cause fatigue, shortness of breath and chest pain. The application of the enhanced recovery protocol and rehabilitation interventions after Nuss procedure are poorly described in the literature. Purpose - to evaluate the clinical results of using a modified protocol of enhanced recovery after surgical correction of pectus excavatum in children. Materials and methods. The results of the treatment of 79 patients with a funnel-shaped chest deformity aged (14.2±1.6) who underwent surgical correction of the deformity according to Nuss method were analyzed. Two groups of patients were analyzed, according to the protocol of postoperative management: the Group I (n=20) - patients of traditional postoperative management, the Group II (n=59) - according to the the enhanced protocol of recovery. In the Group II, psychological and physical training was additionally included in the preoperative plan. Results. The groups were the same in terms of age, Haller index, and time of surgery (p>0.05). The length of stay in the hospital was significantly (p<0.001) shorter in patients of the Group II. The use of the epidural analgesia method in patients of the Group II made it possible to significantly reduce both the dose and the duration of taking opioid analgesics to 1 day, in contrast to the Group I (up to 3 days). The lack of pleural drainage enabled the patient to become more active after a day - to get up, walk, and take some procedures. Conclusions. The protocol of the enhanced postoperative recovery, which includes a program of rehabilitation treatment, early removal of the urinary catheter and early verticalization of the patient, improves the quality of recovery of patients after reconstruction of funnel-shaped deformity of the chest and reduces the length of stay of patients in hospital treatment after surgery. The research was carried out in accordance with the principles of the Declaration of Helsinki. The research protocol was approved by the Local Ethics Committee of the participating institution. Informed consent of the patients was obtained for the research. No conflict of interests was declared by the authors.
Reactiveness and inclusiveness as the characteristics of regional labour markets regarding the situation of young people
Authors: Bal-Domańska Beata
Published: April 2024

Having observed the growing number of transnational shocks affecting the national and regional economies, it is worth assessing the condition of regional labour markets, primarily in the con -text of the situation of young people, who for many years have been one of the most vulnerable groups in the labour market. The problem of non-inclusiveness of the labour markets regarding young workers affects both markets presenting high unemployment rates and highly responsive to economic shocks, and also those featuring low youth unemployment rates and stable economic conditions. The article defines models of regional labour markets with regard to the situation of young people in terms of their reactivity of youth labour markets to economic shocks, and their inclusiveness compared to adults.
The Theoretical and Practical Rationale for the Role of Regional Development Funds in the Economy
Authors: Korenik Dorota
Published: April 2024

The aim of the paper was to formulate a theoretical basis to justify the role of a specific financial institution, i.e. the Regional Development Fund (RDF), in the regional economy, and to establish the actual role of Regional Development Funds (RDFs) in Poland. The concept of comparative finance was used. Based on the principle of inference per analogiam in terms of the RDFs’ belonging to the market financial sector, the classical paradigm of financial intermediation and the paradigm transpositions of the bank’s role in the economy were used, and, complementarily, paradigms specific to public finance. In terms of establishing the actual role in the Polish reality, a descriptive method was used, after desk research analysis of RDFs financial reports, Investment Strategy documents, reports of the Association of Regional Development Funds. Theoretical paradigms appropriate to the specifics of the Regional Development Fund were obtained to explain its position in the region’s economy, moreover, the true role of such institutions in the Polish economy was established. The multidimensionality of the RDF’s role in the economy and its dual nature should be explained on the basis of paradigms of financial intermediation in their fusion with paradigms of the role of public finance. There are no arguments strong enough to undermine the legitimacy of the existence of current RDFs in Poland, yet it cannot be stated unequivocally that Polish RDFs perform sufficiently well in the assigned dual role. There are areas for improvement (the incentive system and the operational criteria in the Investment Strategies), which could significantly improve the usefulness of RDFs in the economy of the regions.
Fuzzifying bornivorous sets of fuzzifying bornological linear spaces
Authors: Yan C. H.
Published: April 2024

The main purpose of this paper is to introduce a notion of

fuzzifying bornivorous sets of fuzzifying bornological linear

spaces. In particular, we provide an example of fuzzifying

bornivorous sets on a fuzzifying topological linear space with its

von Neumann bornology. Furthermore, the description of fuzzifying

open sets of fuzzifying bornological linear spaces is showed and its

equivalent illustration is discussed as well. In addition, we study

the dual relationship of fuzzifying open and close sets. The

fuzzifying topological space induced by fuzzifying open sets is also

discussed.
Local distance antimagic cromatic number of join product of graphs with cycles or paths
Authors: Shiu Wai-chee , Lau Gee-choon , M Nalliah
Published: April 2024

Let $G$ be a graph of order $p$ without isolated vertices. A bijection $f: V \to \{1,2,3,\dots,p\}$ is called a local distance antimagic labeling, if $w_f(u)\ne w_f(v)$ for every edge $uv$ of $G$, where $w_f(u)=\sum_{x\epsilon N(u)} {f(x)}$. The local distance antimagic chromatic number $\chi_{lda}(G)$ is defined to be the minimum number of colors taken over all colorings of $G$ induced by local distance antimagic labelings of $G$. In this paper, we determined the local distance antimagic chromatic number of some cycles, paths, disjoint union of 3-paths. We also determined the local distance antimagic chromatic number of join products of some graphs with cycles or paths.
A NOTE ON NONLINEAR MIXED TYPE PRODUCT [E ⋄ K, D]∗ ON ∗-ALGEBRAS
Authors: Siddeeque Mohammad Aslam , Bhat Raof Ahmad , Alam Mohammad Shane
Published: April 2024

Let B be a ∗-algebra with the unity and a nontrivial projection. In the present paper, we show under certain restrictions that if a map Ψ : B →B satisfies

Ψ([E ⋄ K, D]∗) = [Ψ(E) ⋄ K, D]∗ + [E ⋄Ψ(K), D]∗ + [E ⋄ K, Ψ(D)]∗ for all E, K, D ∈ B, then Ψ is an additive ∗-derivation.
Ćirić contraction with graphical structure of bipolar metric spaces and related fixed point theorems
Authors: Younıs Mudasir , Mutlu Ali , Ahmad Haroon
Published: April 2024

We present the novel concept of graphical bipolar metric-type space in this article, which combines the notions of graph theory with fixed point theory. We prove that every bipolar metric space is a graphical bipolar metric space but the converse is not true in general. Various concepts like covariant mapping, contravariant mapping, and Cauchy bisequence are also discussed within the context of graphical bipolar metric-type spaces. Furthermore, in this study, we show that fixed point results exist in graphical structures of bipolar metric spaces and a series of examples are provided to support the main results within the realm of the graph structure.
The direct product of a star and a path is antimagic
Authors: Latchoumanane Vinothkumar , V Murugan , Fenovcıkova Andrea
Published: April 2024

A graph $G$ is antimagic if there exists a bijection $f$ from $E(G)$ to $\left\{1,2, \dots,|E(G)|\right\}$ such that the vertex sums for all vertices of $G$ are distinct, where the vertex sum is defined as the sum of the labels of all incident edges. Hartsfield and Ringel conjectured that every connected graph other than $K_2$ admits an antimagic labeling. It is still a challenging problem to address antimagicness in the case of disconnected graphs. In this paper, we study antimagicness for the disconnected graph that is constructed as the direct product of a star and a path.
On $k$-quasi-$(m,n,\mathbf{C})$-isosymmetric operators
Authors: Gherairi Khadija , Maqbul Saqer Alruwaili Nouf , Ould Ahmedmahmoud Sid Ahmed
Published: April 2024

We study the set of $k$-quasi-$(m,n,\mathbf{C})$-isosymmetric operators. This family extends the set of $(m,,n,\mathbf{C})$-isosymmetric operators. In the present article, we give operator matrix representation of $k$-quasi-$(m,,n,\mathbf{C})$-isosymmetric operator in order to obtain some structural properties for such operators. We show that if ${\bf R}$ is a $k$-quasi-$(m,n,\mathbf{C})$ isosymmetric, then ${\bf R}^{q}$ is a $k$-quasi-$(m,n,\mathbf{C})$-isosymmetric operator. We show that the product of a $k_1$-quasi-$(m_1,n_1,\mathbf{C})$-isosymmetric and a $k_2$-quasi-$(m_2,n_2,\mathbf{C})$-isosymmetric which are $\mathbf{C}$-double commuting is a $\max\{k_1 ,k_2\}$-quasi-$(m_1+m_2 - 1,n_1+n_2-1, \mathbf{C})$-isosymmetry under suitable conditions. In particular, we prove the stability of perturbation of $k$-quasi-$(m,n, \mathbf{C})$-isosymmetric operator by a nilpotent operator of order $p$ under suitable conditions. Moreover, we give some results about the joint approximate spectrum of a $k$-quasi-$(m,n,\mathbf{C})$-isosymmetric operator.
Finite $p$-groups in which the normalizer of each nonnormal subgroup is small
Authors: Zhao Libo , Li Yangming , Gong Lü , Guo Xiuyun
Published: April 2024

Let $G$ be a finite non-Dedekindian $p$-group which satisfies $N_G(H)=HZ(G)$ for each nonnormal subgroup $H$, and we call it an $NS$-group. In this paper, it is proved that an $NS$-group is the product of a minimal nonabelian group and the center.
Making written texts for learning more accessible with easy-to-read and universal design
Authors: Herrera Nieves Liliana , De La Hoz Vargas Verónica , Coba Roncallo Elis , Hernández Gutiérrez Ariana
Published: April 2024

Reading is regarded as one of the basic learning processes that provides multiple skills and abilities for daily life. The study reported on here arose from evidence of reading comprehension difficulties of middle school students in Colombia, and from reflection on the didactic strategies used for the promotion and teaching of reading. The purpose of this research was to strengthen students’ reading comprehension by taking advantage of the benefits of Easy-to-Read in the context of a methodology applied in Universal Design for Learning. The methodology was centred on the critical social paradigm, and the type of research was mixed with a design based on action research. The instruments used included non-participant observation, online questionnaire, standardised testing and a survey. The pedagogical proposal “Easy Reading” was designed and implemented to show progress in the students’ reading comprehension skills, meeting the objectives set.
Listening to foreign language student teachers: The use of transcripts to study classroom interactions
Authors: Al-Amri Majid N.
Published: April 2024

Although many issues about the use of transcripts for studying classroom interactions have been addressed in other studies, little attention has been given to the use of transcripts to study student teachers’ classroom interactions. To achieve a deeper understanding of student teachers’ perspectives and permit the formulation of a more appropriate framework, it is crucial to hear from student teachers and investigate their experiences about the use of transcripts. Therefore, in the study reported on here we used 7 focus-group interviews of approximately 6 Saudi EFL (English as a foreign language) student teachers in each group to investigate their perceptions on the use of transcripts for studying their classroom interactions. The data were thematically analysed. Three themes that represented the participants’ experiences of using transcripts to study their classroom interactions emerged: using the transcript analysis, learning from the transcript analysis, and committing to using the transcript analysis. The findings reveal that most participants felt they had autonomy in using transcripts to study their classroom interactions, but experienced some challenges. Most students were determined to change their classroom interaction based on their analyses of classroom interactions but only a few demonstrated the determination to continue using the transcript analysis approach.
Suggestibility Among the Indian Youth – A Validation Study of Multidimensional Iowa Suggestibility Scale
Authors:   Amity University, Panvel, Mumbai, Maharashtra, India, Agarwal Sanchi , Gawali Gautam ,   Amity University, Mumbai, Maharashtra, India, Puranik Deepti ,   NMIMS- Deemed-to-be-University, Mumbai, India
Published: April 2024

Suggestibility is one of the personality traits. The ability to accept signals from oneself, another person, or any type of media without feeling obligated to do so, including messages concerning physiological feelings, is referred to as suggestibility. It varies from compliance in that it requires the internalisation of a message rather than just a behavioural change. The study aims to validate the Multidimensional Iowa suggestibility Scale (MISS) developed by Dr Roman Kotov on Indian youth for future use and application. The study’s hypothesis is that the scale will be highly reliable and valid for the Indian population. The original scale established by Dr Roman Kotov consisted of 95 items to be responded to by choosing the appropriate option from five given, which was given to an Indian sample of 510 individuals. The scale includes five suggestibility subscales and two companion scales. To check the validity, inter-scale correlation and reliability was performed. The results have been positive, with high correlations among the subscales, which suggests further future use. MISS, consisting of five subscales of suggestibility and a Short Suggestibility Scale, has been validated and can be used on the Indian population.
AVALIAÇÃO DO VOLUME E FORÇA DO MÚSCULO QUADRÍCEPS ANTES E APÓS OPERAÇÃO DE RECONSTRUÇÃO DO LIGAMENTO CRUZADO ANTERIOR
Authors: Thiele André Luis Menezes Schwansee , Thiele Edilson Schwansee , Thiele Luis Fernando Menezes Schwansee , Tabushi Fernando Issamu , Nassif Paulo Afonso Nunes , Collaço Luiz Martins , Polanski Jose Fernando , Ribas Filho Jurandir Marcondes
Published: April 2024

Introdução: O ligamento cruzado anterior é um dos principais ligamentos do joelho, frequentemente mais suscetível às lesões devido à sua posição central e seu papel vital na estabilização desta articulação. A força do quadríceps desempenha papel crucial, com função de absorção de impacto, auxiliando na redução de carga.

Objetivo: Avaliar o volume e a força do músculo quadríceps antes e após a reconstrução do ligamento cruzado anterior do joelho, sua correlação e quais as variáveis preditivas da força muscular pré e pós-operatória.

Método: Coorte prospectiva de 37 pacientes avaliados no pré-operatório e com 4 meses após a operação, por meio de ressonância magnética e dinamometria isocinética. As medidas do membro submetido à operação foram comparadas ao membro contralateral como controle.

Resultado: O volume do músculo quadríceps foi de 65,2+13,4cm3 antes e de 63,4+15,9 cm3 após, significativamente menor no controle nos 2 momentos, com redução de 3,0cm3 (4,1%) no pré e 7,8 cm3 no pós (12,0%). A força muscular foi de 105,5+29,9N/m antes e de 100,9+28,6N/m após, significativamente menor no membro operado (126,4+28,2N/m e 129,6+27,6N/m, p<0,001). Esta redução foi semelhante nos 2 momentos de avaliação, em média de 17,5N/m (16,3%) no pré e de 22,8N/m (22,5%) no pós. A perda de força foi maior que a perda de volume muscular, sendo que o volume muscular e o tempo da lesão do ligamento cruzado anterior foram os principais determinantes da força muscular no pré. A força no pós foi determinada principalmente pela do pré.

Conclusão: A perda de força muscular foi 4 vezes maior que a perda de volume no pré e 2 vezes maior no pós, indicando início da recuperação com 4 meses no pós-operatório.
Modified cam clay bounding surface hyper-viscoplastic model
Authors: Dadras-Ajirlou Davood , Grimstad Gustav , Ghoreishian Amiri Seyed Ali , Degago Samson Abate , Houlsby Guy Tinmouth
Published: April 2024

Clays exhibit complex mechanical behaviour with significant viscous, nonlinear, and hysteric characteristics, beyond the prediction capacity of the well-known modified cam clay (MCC) model. This paper extends the MCC model to address these important limitations. The proposed family of models is constructed entirely within the hyperplasticity framework deduced from thermodynamic extremal principles. More specifically, the previously developed MCC hyper-viscoplastic model based on the isotache concept is extended to incorporate multiple internal variables and to capture recent loading history, hysteresis, and smooth response of the material. This is achieved by defining an inelastic free energy and an element that implements a bounding surface within hyperplasticity, resulting in pressure dependency in both reversible and irreversible processes with a unique critical state envelope, and only eight material parameters with a readily measurable viscous parameter. A kinematic hardening in the logistic differential form in stress space is derived that enables the proposed model to function effectively across a wide range of stresses. Based on this kinematic hardening rule, the current stress state acts as an asymptotic attractor for the back/shift stresses whose evolution rates are proportional to their current state.
Age-dependent deflection analysis of high-volume fly ash RC beams: experimental and artificial neural network modelling
Authors: Hashmi Ahmad Fuzail , Shariq Mohd , Baqi Abdul , Ayaz Md , Bilal Ahmed
Published: April 2024

This research examines the influence of high-volume fly ash (HVFA) on reinforced concrete (RC) beam deflections over 180 days of continuous loading. The study comprises eight fly ash-based concrete mixes with varying fly ash ratios (0–60%). Experimental assessments were conducted on two load levels, corresponding to 25% and 50% of the initial cracking load. Thirty-two full-scale RC beams, each measuring 100 × 150 × 1800 mm, were fabricated for both load levels. Long-term deflections were monitored for all concrete mixes through sustained four-point bending tests at ages ranging from 1 to 180 days. A comparative analysis of the overall mid-span deflection between conventional and fly ash concrete RC beams was carried out against established design codes. It was determined that high-volume fly ash RC beams exhibited less creep and shrinkage deflection compared with conventional RC beams. Moreover, artificial neural network (ANN) modelling was also carried out to propose a significant model helpful in predicting the total deflection of RC beams containing any fly ash content and at any age of concrete. The present study offers valuable insights for engineers and designers, facilitating the evaluation of age-dependent deflection patterns in RC beams constructed with reinforced high-volume fly ash concrete.
Developing geopolymer concrete using fine recycled concrete powder and recycled aggregates
Authors: Singh Paramveer , Kapoor Kanish
Published: April 2024

To develop a sustainable geopolymer concrete (GC), the efficacy of using fine recycled concrete powder (FRCP) and recycled aggregates (RA) as partial replacements for fly ash (FA) and natural aggregates (NA), respectively, was investigated. The compressive strengths of different GCs were measured. The durability performance was assessed by means of capillary suction tests, initial surface absorption tests and acid attack performed at ambient curing. The compressive strength of the GC made with 50% RA (both coarse and fine) and FRCP was found to be comparable to that of GC made with NA. Similarly, the inclusion of FRCP in the GC mixes resulted in a pore-blocking effect, restricting water ingress to the GC through capillary suction and surface absorption, even with the use of 50% coarse RA and 25% fine RA. The results demonstrated that sustainable GC can be developed using appropriate doses of FRCP and RA.
HETEROORGANIC COMPOUNDS ARE EFFECTIVE CORROSION INHIBITORS OF METAL EQUIPMENT
Authors: Kazieva Regina Yu. , Abdullayeva Narmina R. , Aliyeva Leylufer I.
Published: April 2024

Oil and gas equipment is operated in very difficult conditions. The reliability and durability of equipment depends on the technical and economic characteristics of structural materials. They are subject to very strict conditions. High demands are placed on the corrosion resistance of structural materials. The service life of metal structures in aggressive and hazardous environments is relatively short due to irreversible corrosion processes of metal equipment. Without the use of special chemical reagents, long-term operation of equipment in the oil and gas industries is impossible. The rapid development of these industries indicates a high demand for these reagents. General methods of combating the physical and chemical destruction of metals include the use of corrosion-resistant metals such as chromium and zinc as protective coatings, alloying of metals, the use of paints and varnishes, as well as special corrosion-resistant products when creating equipment, electrochemical protection, etc. A common method of protection is the use of inhibitors. They provide a reduction in the rate of corrosion process in metals in contact with various aggressive environments. To date, a fairly large number of organic and inorganic substances have been studied that influence the rate of the corrosion process in metals. Organic inhibitors are widely used because they are capable of forming stable protective films on the surface of metals. Highly effective inhibitors of organic origin mainly include substances containing heteroatoms. In this article, based on modern literature data from research by various authors, the task is to identify the most appropriate methods of combating corrosion. The principles of corrosion protection are considered, which made it possible to develop basic provisions for the organization and technology of using heteroorganic inhibitors, taking into account the aggressive effects of corrosive components.
PROPERTIES AND METHODS FOR PRODUCTION OF POLYETHERETHERKETONE
Authors: Fiterman Sofia I. , Sharafutdinov Emil R. , Onegov Nikita A. , Rudnev Nikolay A.
Published: April 2024

The polymer industry in Russia is one of the most promising industries predisposing to economic development. There is increasing interest in so-called high-performance plastics, which have a list of constructive and technological properties, the key of which is high temperature stability. Among these, it is worth highlighting polyetheretherketone (PEEK), one of the most expensive polymers, the cost of which is due not only to high-temperature stability, but also to mechanical and good electrical insulating properties, resistance to β-, γ-, X-ray and infrared radiation, to chemical influences and etc.This paper reviews the properties of PEEK and the demand for it on the market today. A comparative analysis of currently existing methods of its production was carried out. The most promising synthesis method for industrial implementation and its features have been studied.This material can be used to construct a calculation technological scheme for the synthesis of polyetheretherketone.
POSSIBILITY OF USING A PRODUCT OF NATURAL POLYMER CHEMICAL PROCESSING TO IMPROVE CONCRETE MIXTURE PLASTICIZING PROPERTIES
Authors: Dimitriev Evgeniy N. , Teptereva Galina A.
Published: April 2024

In modern construction, increasing attention is paid to the search for new materials and technologies that can improve the properties of concrete mixtures. Chemical additives such as superplasticizers and air bubbles are used to improve the workability of the concrete mixture and increase its plasticity. The strength characteristics of concrete mixtures are an important criterion in solving issues related to the profitability of the construction process. The use of plasticizers and hardening accelerators makes it possible to obtain high-strength mixtures with unique characteristics and guarantee high quality construction. Lignosulfonate-based additives have unique properties that can significantly increase the plasticizing characteristics of a concrete mixture. Tests for strength, frost resistance, resistance to aggressive environments, bending and torsion make it possible to evaluate the properties of concrete with lignosulfonate-based additives.While researching, several samples of concrete mixtures with different compositions were prepared. In the experimental testing laboratory, under conditions close to production conditions, a series of experiments was carried out with samples of concrete mixtures for compliance with the requirements of regulatory documents for concrete quality: a lignosulfonate-based additive with concentrations 0.5 %, 1 %, 1.5 % was added to the concrete mixture of compressive strength class B15 to volume 2286 kg/m3.It has been established that the use of a product of natural polymer chemical processing – lignosulfonate – improves the plasticizing properties of concrete mixtures with a two to fivefold increase in mobility and without slowing down the hardening of concrete both in the early (3 days) and late (10–15 days) periods of hardening.It has been revealed that the use of an additive based on lignosulfonate helps to increase the strength of concrete by 25–30 % compared to known plasticizing additives.It has been calculated that the use of a lignosulfonate-based additive helps to reduce cement consumption by 12–15 %.It has been shown that the addition of 1 % lignosulfonate reduces water absorption by 9 % and increases the average strength over 7 days by 10 %, which makes it possible to use the practical results of the research to develop new concrete compositions with improved technical characteristics.
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Published: April 2024

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Política pública en la garantía del derecho a una vida libre de violencia sexual en el sistema educativo ecuatoriano
Authors: Bustamante-Torres Johanna Patricia
Published: April 2024

Objetivo. Analizar la política pública para la garantía del derecho de las niñas, niños y adolescentes a una vida libre de violencia sexual en el sistema educativo ecuatoriano durante los últimos cinco años. Metodología. El método empleado para el desarrollo de la investigación fue de corte cualitativo, por medio de entrevistas a interlocutores expertos. Resultados. Se destaca que el Ministerio de Educación en calidad de ente rector de la educación ha establecido funciones primordiales dentro del sistema de protección integral: prevención, sanción y reparación en hechos de violencia sexual, para lo cual han implementado proyectos y programas con base en estrategias psicopedagógicas y metodológicas destinadas a garantizar una vida libre de violencia dentro de las instituciones educativas. Conclusión. A pesar de las medidas establecidas para contrarrestar la violencia sexual en las aulas, las estadísticas van en aumento, así como la impunidad de estos hechos denigrantes.
La visita como esfera de saber en trabajo social. Lectura comprensiva al acto de visitación
Authors: Yáñez-Pereira Víctor R.
Published: April 2024

Objetivo. Configurar el acto de visitación como esfera de saber disciplinar, sin reducirla a un medio de acceso e intervención al espacio doméstico, en los deslindes del domicilio. Metodología. Mediante el método de revisión documental y análisis de contenido manifiesto, comprensivamente se deconstruyen textos escritos en Trabajo Social iberoamericano. Resultados. En cuanto hallazgo principal se denota el vacío en la localización de la visita como núcleo de saber para la profesión, privilegiándose su instrumentalización e inmediatez operativa. Conclusión. Para asumir la visitación como matiz de sentido en la visita, a través de la hermenéutica contemporánea y la fenomenología hermenéutica, se concluye la necesidad de reconocerla como proceso intersubjetivo de “encuentro”, donde se develan modus vivendi que habitan lo cotidiano, entre tensiones públicas y privadas donde acontecen y se objetivan efectos de la cuestión social, respecto de los que es fundamental producir conocimiento situado.
Evaluación de una experiencia innovadora de gamificación en educación superior: el caso de ingeniería
Authors: Morales Londoño Natalie , Tejada Fernández José , Ospina-Mateus Holman
Published: April 2024

Introducción. En el contexto de la educación superior, basada en perfiles y competencias profesionales, se requieren prácticas y herramientas que permitan crear escenarios que favorezcan el proceso de enseñanza – aprendizaje. En este estudio se analiza la eficacia de la gamificación como estrategia innovadora para la adquisición de competencias profesionales, buscando identificar los componentes que influyen en su proceso de adquisición. Método. La investigación se fundamenta en un estudio de caso múltiple de investigación-acción de gamificación, implementado en tres grupos de ingeniería industrial en la Facultad de Ingeniería del Tecnológico de Comfenalco (Cartagena de Indias, Colombia). El estudio se estableció en cuatro momentos donde se conjugaron experiencias de aprendizaje, buscando identificar los efectos y los componentes que influyen en el proceso de aprendizaje. Resultados. Los resultados evidencian la efectividad de la gamificación en la medida en que los estudiantes modificaron su forma de abordar lo desconocido de manera creativa, permitiendo la generación de un pensamiento convergente, la comprensión de reglas, la formulación de hipótesis y la construcción de conocimiento. Conclusiones. Se concluye que la gamificación genera ambientes de aprendizaje significativos y efectivos para la adquisición de competencias y la necesidad de experimentar prácticas innovadoras y dinámicas dentro del aula que permiten alternar escenarios dentro del contexto socioprofesional.
Originalidad shakesperiana y herencia clásica en "El sueño de una noche de verano" / Shakespearean originality and classical heritage in “A Midsummer Night's Dream”
Authors: Pons Tovar Montserrat
Published: April 2024

Resumen: Nuestro objetivo es explorar los límites que existen entre la creatividad artística del dramaturgo inglés y el peso de la tradición, en este caso, grecorromana, amén de animar a los profesores de literatura a que exploten la obra en clase. Para ello, comenzaremos nuestro estudio con una breve introducción al panorama literario renacentista de Inglaterra a fin de facilitarle al lector información sobre los antecedentes y el ambiente en el que se desarrolló la producción shakespeariana. Seguidamente, pasaremos a un análisis que se basará en los siguientes puntos: las alusiones mitológicas, los recursos dramáticos y los elementos típicos de otros géneros literarios . En último lugar, ofrecemos nuestras reflexiones al respecto a modo de conclusión.

Palabras clave: Shakespeare; teatro; comedia; tradición clásica.

Abstract: With this article we present teaching professionals a personal view of one of the plays most represented, read and versioned of William Shakespeare with the intention that they exploit it in class. It's A Midsummer Night's Dream, a work rich in literary traditions, suitable for all audiences. Our goal is to explore the boundaries between artistic creativity of English playwright and the weight of tradition, in this case, Greco-Roman. We will start our study with a brief introduction to the Renaissance literary scene of England to provide the reader with information about the background and environment in which Shakespearean production was developed. Next, we turn to an analysis of the work that we study which will be based on the following points: the mythological allusions, the dramatic resources and the typical elements of other genres such as pastoral poetry and the ancient novel. Finally, we offer our thoughts on the subject to conclusion.

Key words: Shakespeare; theater;comedy; classical tradition.
Impacts of grazing management strategies on forage canopy structure in multi-species pastures during the wet-dry transition period
Authors: Penteado L. F. , Batista A. C. L. , Ongaro A. F. B. , Vieira M. M. , Simili F. F. , Costa R. L. D. , Barbosa C. M. P. , Simão S. D. , Gimenes F. M. A.
Published: April 2024

The condition of pastures during the wet-dry transition period reduces livestock production since there is an increase in dead material and a reduction in green tissues. This study evaluated the influence of grazing management strategies on the structure of the forage canopy during the wet-dry transition period. The pastures were composed of Aruana guineagrass (Megathyrsus maximum Syn. Panicum maximum cv. Aruana) and three legumes: Macrotyloma (Macrotyloma axillare), Calopo (Calopogoinum mucunoides), and Stylo (Stylosanthes macrocephala + Stylosanthes capitata). The treatments corresponded to four forage canopy heights (15, 30, 45, and 60 cm), and the grazing management strategies involved steady or variable stocking rates with sheep. The experiment was conducted in a randomized complete block design with four replications totaling 16 experimental units (paddocks). The masses of grass leaf blades and stems were higher at heights of 45 and 60 cm (P = 0.002), while the proportion of dead material was smaller in these than in the short pastures (15 and 30 cm) (P = 0.0497). There was an increase in the proportion of dead material over the dry-water transition period. The presence of grass and legume leaves was higher in the upper stratum of tall pastures (45 and 60 cm) and the proportion of legumes did not differ between grazing management strategies (P > 0.05). These strategies were represented by canopy heights of 45 to 60 cm and showed more leaf mass, less dead material, and better pasture structure, so these parameters can be used during the wet-dry transition period.
Intelligent Hemorrhage Identification in Wireless Capsule Endoscopy Pictures Using AI Techniques.
Authors: Himanshu Sharma Et al.
Published: April 2024

Image segmentation in medical images is performed to extract valuable information from the images by concentrating on the region of interest. Mostly, the number of medical images generated from a diagnosis is large and not ideal to treat with traditional ways of segmentation using machine learning models due to their numerous and complex features. To obtain crucial features from this large set of images, deep learning is a good choice over traditional machine learning algorithms. Wireless capsule endoscopy images comprise normal and sick frames and often suffers with a big data imbalance ratio which is sometimes 1000:1 for normal and sick classes. They are also special type of confounding images due to movement of the (capsule) camera, organs and variations in luminance to capture the site texture inside the body. So, we have proposed an automatic deep learning model based to detect bleeding frames out of the WCE images. The proposed model is based on Convolutional Neural Network (CNN) and its performance is compared with state-of- the-art methods including Logistic Regression, Support Vector Machine, Artificial Neural Network and Random Forest. The proposed model reduces the computational burden by offering the automatic feature extraction. It has promising accuracy with an F1 score of 0.76.