bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multifunctional engineered cementitious composites modified with nanomaterials and their applications: An overview
Authors: Haruna Sani , Adamu Musa , Ibrahim Yasser E. , Haruna Sadi I. , Seif ElDin Hany M. , Hamza Mukhtar Fatihu , Azab Marc 
Published: May 2023

Abstract
Due to their advantages such as high tensile strength, low cost of production, easy manufacturing methods, and ease of use, cementitious materials are extensively utilized in the construction industry. The applications of nanomaterials in cementitious materials have been found to enhance their properties. It allows molecular changes to improve the material behaviour and the performance of civil infrastructure structures, including buildings and highways. Owing to the high ductility of polyvinyl alcohol-engineered cementitious composites (ECCs), it was suggested to be used in steel-reinforced structural elements to enhance the strength and ductility of the components. The presence of hybrid fibres provided increased shattering resistance with decreased scabbing, spalling, destruction, and damage zone and better absorption of energy through distributed microcracking. The presence of nanomaterials in ECCs modifies its atomic macroscopic scales, enhancing its mechanical and microstructural properties. The versatile properties of nanomaterials offer immense potential to cementitious composite for structural applications.
Pathway specific interventions reveal the multiple roles of ventral hippocampus projections in cognitive functions
Authors: Bakoyiannis Ioannis , Ducourneau Eva-Gunnel , Parkes Shauna L. , Ferreira Guillaume 
Published: May 2023

Abstract
Since the 1950s study of Scoville and Milner on the case H.M., the hippocampus has attracted neuroscientists’ attention. The hippocampus has been traditionally divided into dorsal and ventral parts, each of which projects to different brain structures and mediates various functions. Despite a predominant interest in its dorsal part in animal models, especially regarding episodic-like and spatial cognition, recent data highlight the role of the ventral hippocampus (vHPC), as the main hippocampal output, in cognitive processes. Here, we review recent studies conducted in rodents that have used advanced in vivo functional techniques to specifically monitor and manipulate vHPC efferent pathways and delineate the roles of these specific projections in learning and memory processes. Results highlight that vHPC projections to basal amygdala are implicated in emotional memory, to nucleus accumbens in social memory and instrumental actions and to prefrontal cortex in all the above as well as in object-based memory. Some of these hippocampal projections also modulate feeding and anxiety-like behaviours providing further evidence that the “one pathway-one function” view is outdated and future directions are proposed to better understand the role of hippocampal pathways and shed further light on its connectivity and function.
Cobalt(II) and nickel(II) complexes based on 2,5-di(pyridine-4-yl)thiazolo[5,4-d]thiazole and dicarboxylate ligands: synthesis, structures and properties
Authors: Ai Jing , Yang Lei , Tian Zhong Zhen 
Published: May 2023

Abstract
Two metal coordination polymers [Ni(oba)(Py2TTz)1.5(H2O)]·2H2O·DMF (1) and [Co(oba)(Py2TTz)(H2O)4]·2H2O (2) have been synthesized under solvothermal conditions [H2oba = 4,4′-oxybis(benzoic acid) and Py2TTz = 2,5-di(pyridine-4-yl)thiazolo[5,4-d]thiazole]. Crystals of compound 1 belong to the orthorhombic system, space group Ibam, with a = 38.928(8), b = 7.7113(14), c = 28.508(6) Å, V = 8558(3) Å3, Z = 8. Compound 2 crystallizes in the monoclinic crystal system, space group C2/c, with a = 33.816(3), b = 6.2697(6), c = 13.5821(13) Å, β = 96.393(3)°, V = 2861.7(5) Å3, Z = 4. The oba2− dianions link two Ni atoms through unidentate carboxylate moieties in a μ
1 − η
1:η
0 coordination mode. Compound 1 features a three-dimensional (3D) framework structure with Py2TTz and oba2− ligands. In compound 2, the central cobalt ion is in an octahedral geometry, which is defined by four oxygen atoms from four different coordinated water molecules and two nitrogen atoms from two different Py2TTz ligands. It is noteworthy that the dicarboxylate ligands oba2− with four oxygen atoms do not directly coordinate with the cobalt ion, and only act as a counter-anion. The luminescence properties of 1 and 2 were also investigated.
Factor Analysis of Continuance Intention to Use QR Code Mobile Payment Services: An Extended Expectation-Confirmation Model (ECM)
Authors: Ifada Alda Bernika , Abidin Zaenal 
Published: May 2023

QR code mobile payment is a payment method that is quite popular in Indonesia where users only need to open or display a QR code on the m-payment application when making transactions. Users can make payments easily, anywhere and anytime. Apart from the benefits of QR codes on m-payments, there are still obstacles regarding the intention to continue using them. Some users stopped using the QR code service on the m-payment application due to the potential risks involved. The purpose of this study is to find out what factors can affect continued intention to use QR code m-payment. The research model used is the Extended Expectation-Confirmation Model (ECM) by combining ECM and UTAUT and adding trust and perceived risk variables. The number of samples in this study was 313 participants who were users who had used QR code m-payment OVO, GoPay, or ShopeePay with a minimum age of 17 years. The sampling technique used is purposive sampling. This study uses quantitative methods and data analysis with the PLS-SEM approach using SmartPLS version 3. The results of this study are three rejected hypotheses and nine accepted hypotheses. Based on the accepted hypotheses, it shows that social influence, trust, and satisfaction affect continuance intention to use QR code m-payment. Social influence is the biggest factor affecting continuance intention to use QR code m-payment service. These results can be considered for developers and companies such as OVO, GoPay, and ShopeePay.
Factors Influencing Community Behavior towards SIKER: An Extension of the TAM model
Authors: Majid Muhammad Nurkholis , Abidin Zaenal 
Published: May 2023

Sistem Kerja (SIKER) is a system that allows the public to make yellow cards/AK1, join job training, look for job vacancies and invite for interviews. In its application, not many public of Semarang city have adopted SIKER even though the city of Semarang is ranked 2nd in the excellent category in Central Java province in the e-government rankings. This study will observe the effect of perceived usefulness, perceived ease of use, facilitating conditions, and social influence on the behavioral intention of the public of Semarang city in utilizing SIKER, and the variables age and perceived trust will be used as intervening variables. This study uses a quantitative descriptive method with a data analysis approach using Partial Least Square Structural Equation Modeling (PLS-SEM) by utilizing SmartPLS version 3.2.9 tools. A number of 330 valid respondents participated in this current study. The results of this study show that the factors that influence the behavioral intention of the public of Semarang are perceived trust, perceived usefulness, facilitating conditions, and age with a negative direction. Perceived trust is proven to be the biggest factor influencing the behavioral intention to use SIKER services. Whereas the intervening effect of perceived trust is proven to intervene with perceived ease of use and perceived usefulness towards behavioral intention with the intervening effects of full mediation and partial mediation. However, for age, it is proven not to intervene with no intervening effect and unmediated effect.
Development of Environmental Pollution E-Module Containing Socio Scientific Issue to Train Students' Scientific Literacy
Authors: Fitriani Rizki , Amalia Andin Vita 
Published: May 2023

This study aims to analyze the characteristics, validity, readability of the E-module and the profile of students' scientific literacy after using the E-module. The design of this research is Research and Development (R&D), using the Sugiyono development model which consists of ten steps, potential and problems, data collection, product design, design validation, design revisions, product trials, product revisions, usage trials, product revisions, and mass production. The research subjects were VII grade students of SMP N 10 Magelang. The average score by the media validator is 96.25% very valid criteria and the material validator is 94.16% very valid criteria. The average score of the small-scale readability test is 91.60% and the average on the large-scale is 92.50% very good category. Based on the results of student scientific literacy profil 6.25% students are in the low scientific literacy, 13% students are in the medium category, 56.25% students are in the high category and 25% students are in the very high category . Based on the results of the study, it can be concluded that the environmental pollution E-module containing the Socio Scientific Issue is valid for use in science learning and can train students' scientific literacy skill.
Prácticas asumidas por docentes y estudiantes con discapacidad visual, para la educación inclusiva en tiempos de Covid-19 en la USTA-BGA
Authors: Arias Pineda Karen Natalia , García Maldonado Karen Liced , Escalona González Kelly Johanna , Santamaria García Sofía Alejandra , Jaimes Chacón María Alejandra 
Published: May 2023

Objetivo: Describir las prácticas cotidianas emprendidas por docentes y estudiantes con discapacidad visual de la Universidad Santo Tomás de Bucaramanga, que facilitan y obstaculizan la educación inclusiva, en tiempos de pandemia SARV-Cov2. Metodología: estudio cualitativo con enfoque descriptivo. Se realizaron entrevistas semi-estructuradas a dos docentes y dos estudiantes con discapacidad visual (baja visión) pertenecientes a la Universidad Santo Tomás de Bucaramanga. Se realizó un análisis descriptivo identificando patrones, regularidades o temas emergentes. Para el proceso de análisis, se utilizó el diseño metodológico desde Taylor y Bogdan. Resultados: De acuerdo con el análisis realizado, emergen cuatro categorías claramente identificables: prácticas metodológicas positivas para la enseñanza en tiempos de Covid-19. Esto se puede identificar y explicar debido a la necesidad urgente de pese a la pandemia, continuar con las acciones académicas previstas. Prácticas positivas para el aprendizaje diseñadas por estudiantes con discapacidad visual. Estas fueron naciendo en la medida que cada estudiante fue descubriendo cómo resolver retos presentados en los momentos de recibir sus clases mediadas por la tecnología. Redes de apoyo cercanas que contribuyen en el proceso de adaptabilidad a la nueva realidad. Sin duda las amistades y la familia se convierten para las personas con discapacidad en un eje fundamental de apoyo, que contribuye en su desarrollo individual. Conclusiones: Los hallazgos permiten reconocer las barreras y facilitadores que identifican las personas con discapacidad visual que están en el marco de un proceso de enseñanza y aprendizaje en el ámbito universitario. Aún persisten brechas que impiden la garantía de acceso a información, plataformas digitales entre otros elementos para las personas con discapacidad visual.
POLYETHYLENE GAS PIPELINES: PRACTICAL POSSIBILITIES TECHNICAL DIAGNOSTICS
Authors: Martynenko S. N. , Zubailov G. I. 
Published: May 2023

Technical diagnostics of in-service polyethylene-exhaust gas pipelines face a number of difficulties, since the existing methods of destructive control are not applicable for determining the mechanical and physical characteristics-stick of polyethylene pipes. The search for effective control methods that can most fully characterize the quality of pipe material and the interpretation of the results obtained are of scientific and practical interest. The article on the example of technical diagnostics of the polyethylene gas pipeline built in 1985 considers possible criteria for assessing the condition of pipes and their ranking by significance. It was found that polyethylene pipes produced during the development of their production did not always meet mandatory quality requirements and could have hidden defects in the form of inhomogeneities, cavities and cracks throughout the volume of pipe material. Based on the experimental studies carried out, it was shown that the pipe material during underground operation does not undergo significant changes in its initial characteristics. At the same time, it was noted that the pipe grades of polyethylene raw materials of the first generation had low resistance to slow crack growth, therefore, the presence of internal defects in the pipe material in owning value with the effect of concentrated loads can lead to premature loss of containment. The work carried out confirmed the possibility of a quantitative design assessment of the technical condition of the gas pipeline based on the results of destructive tests of pipes for long-term hydrostatic strength. The experimental data presented in the article are of interest to specialists who are faced with the need for expert assessment of the state of the pipes of the operated polyethylene gas wires and forecasting their service life.
FEATURES OF RHEOLOGICAL CHARACTERISTICS OF WATER INSULATION MATERIALS BASED ON POLYMER-DISPERSED ORGANOMINERAL REAGENTS
Authors: Akhmetov A. T. , Valiev A. A. , Rakhimov A. A. , Fakhreeva A. V. , Lenchenkova L. E. , Yakubov R. N. 
Published: May 2023

In most of the fields developed by the flooding method, there is an advanced flooding of borehole products associated with water breakthrough through the reservoir, backwater circulation, and also leakiness of the production column. In order to limit the extraction of "excess" water, water insulation technologies are widely used, in which hydrogels of various nature occupy a prominent place. For the rational use of water insulation technologies, it is necessary to know the rheology features and filtration characteristics of grouting materials. This article presents the results of experimental determination of a number of rheological characteristics of a composite insulating material based on sodium silicate, polyacrylamide (PAA), chromium acetate and rice husk dispersion. Rheological measurements were carried out in the oscillatory mode, which provide information about the elastic and viscous characteristics of the sample under study. The elastic modulus (accumulation modulus) characterizes the accumulated deformation energy in the system and reflects the property of the sample as a solid (elastic component). The viscous modulus (loss modulus) determines the energy dissipation and is responsible for the behavior of the sample as a liquid (viscous component). In each case, the range of linear viscoelastic behavior was determined as an interval of strain values in which the structure of the sample under study is not destroyed by deformation. Hydrodynamic modeling is increasingly used in the design of the RIW, which allows not only to reduce the time to justify the processing parameters, but also to increase its efficiency. For the convenience of subsequent hydrodynamic modeling, the results were processed using a two-component Burgers model to obtain the parameters of the elements of this model, which are a kind of «digital passport» of waterproofing materials.
Correlations between the Pronominal Address Forms, Origin (Urban/Rural) and Age: The Case of College Students in Medellin (Colombia)
Authors: Jang Ji Son 
Published: May 2023

In this paper we are going to present some results of a research about pronominal selection among university students in the city of Medellin (Colombia). We have done so considering the following social variables: 1) urban or rural origin of the informant and his/her parents; 2) the average age of respondents. To carry out this research, a questionnaire, which lists different types of interactions from the university students from Medellin was implemented and 806 answers were obtained. In order to analyze the data, we: 1) estimated optimal sample size for polynomial distributions (Thompson, 1987); 2) applied Contingency tables (Cochran, 1952); 3) Non-parametric Kruskal-Wallis test (Kruskal & Wallis, 1952); and 4) Analysis of variance (ANOVA). Statistics show that : 1) students from rural areas with parents of the same origin tend to use more usted than tú/ vos in most interpersonal relationships, and more vos than tú almost exclusively when they are addressing their boy/girlfriend; 2) the average age for the selection of usted is higher than for the selection of tú/vos in most cases, and just in certain cases the average age is higher using tú than the average age using vos.
“The moment of testimonio is over”: theoretical issues and perspectives of testimonial studies
Authors: Fernández Benítez Hans M. 
Published: May 2023

The purpose of this text is to explore the main ideas and issues in the theory surrounding testimonial literature, and to analyze the discussions that brought the genre to a close; these discussions did not take into account the fact that the theoretical-methodological crisis affected the field of testimo­nial studies but did not affect the creation of new testimonies. Hence, the theory of testimonial literature in Latin America emerged from two works (Biography of a Runaway Slave and I, Rigoberta Menchú), is based on the Marxist concept of class struggle, and acknowledges only one type. Tes­timonies that do not fit this model have lost importance or been ignored. Although testimonial studies have entered a crisis, new testimonies conti­nue to be produced. Finally, we posit the need to rekindle the debate based on different corpora and other categories of analysis.
Received: 27-08-09 /Accepted: 24-09-09
How to reference this article:
Fernandez Benitez, H. M. (2010). “The moment of testimonio is over”: problemas teóricos y perspectivas de los estudios testimoniales . Íkala 15(1), pp.47-71.
Telecollaboration in Spanish as a Foreign Language in Trinidad
Authors: Neva Carolina , Landa María , Carter Beverly Anne , Ibrahim-Ali Amina 
Published: May 2023

The objective is to study how participation in tandem partnership influences the motivation towards the target language and culture and the autonomy of learners of Spanish as a foreign language in Trinidad and Tobago. For this reason, an ac­tion research project was conducted with thirty-three learners of Spanish in Trinidad and thirty-three learners of English in Colombia, who engaged in a seven week tele-collaboration during which they used email and Web 2.0 technologies to communicate. Data were collected through questionnaires and a weekly journal. Quantitative and qualitative analyses were carried out. As a result the project was a rich source of learning for all the partici­pants and stresses the need of a deeper understanding of learners' language learning, an analysis of the sociocultural, psycholinguistic, and linguistic dimensions of intercultural competence in a specific context, and the critical assessment of the role of Web 2.0 technologies in fostering autonomy.
Received: 26-08-09 /Accepted: 28-02-10
How to reference this article:
Neva, C.; Landa-Buil, M.; Carter, B.-A. & Ibrahim-Ali, A. Telecollaboration in Spanish as a Foreign Language in Trinidad. Íkala [online]. 2010, vol.15, n.24, pp.75-102.
The Use of Foreign Language Learning Strategies in English and French
Authors: Orrego Luz Mery , Díaz Monsalve Ana Elsy 
Published: May 2023

Objective: To identify conceptions about learning held by students and teachers in the undergraduate Foreign Language Teaching program at the University of Antioquia School of Languages and the frequency with which students use learning strategies to develop communicative competence in English and French. Method: An exploratory and descriptive study was conducted using qualitative and quantitative method. Students and teachers participated in semi-structured interviews individually and in groups, and the students' self-assessment of their learning process was analyzed. Students' learning strategies were described using the questionnaire ''Strategy Inventory for Language Learning'' (version 5.1, Oxford, 1990).Results: For the students, learning is an intellectual development process that requires the use of skills specific to a foreign language. Teachers' conceptions can be classified under four theories of learning: behaviorist, psycholinguistic, pragmatic, and sociocultural. Regarding the use of learning strategies, results show that affective and memory strategies are the least frequently used, whereas cognitive, social, and compensation strategies are the most frequently used. Conclusions: The qualitative analysis of the students' and teachers' conceptions indicates that there are differences in the use of learning strategies between the two languages. However, the quantitative results of the study evidence that, in both English and French, students use learning strategies with the same frequency and in the same way. Received: 01-09-09 / Accepted: 04-03-10 How to reference this article: Orrego, L. M. & Diaz Monsalve, A. E. (2010). Empleo de estrategias de aprendizaje de lenguas extranjeras: inglés y francés. Íkala.15(1), pp.105-142.
Standards-Based Content Resources: A Prerequisite for Content Inte-gration and Content Interoperability
Authors: Galinski Christian 
Published: May 2023

The purpose of this article is to show how standards-based approaches for content standardization, content management, content related services and tools as well as the respective certification systems not only guarantee relia­ble content integration and content interoperability, but also are of particular benefit to people with special needs in eAccessibility/eInclusion. The method was to document MoU/MG/05 N0221 "Semantic Interoperability and the need for a coherent policy for a framework of distributed, possibly federated repositories for all kinds of content items on a world-wide scale", which was adopted in 2005, was a first step towards the formulation of global interope­rability requirements for structured content. These requirements -based on advanced terminological principles- were taken up in EU-projects such as IN-SAFETY (INfrastructure and SAFETY) and OASIS (Open Architecture for Accessible Services Integration and Standardization). The results found were: Content integration and content interoperability are key concepts in connection with the emergence of state-of-the-art distributed and federated databases/repositories of structured content. Given the fact that linguistic content items are increasingly combined with or embedded in non-linguistic content items (and vice versa), a systemic and generic approach to data mo­deling and content management has become the order of the day. Fulfilling the requirements of capability for multilinguality and multimodality, based on open standards makes software and database design fit for eAccessibili­ty/eInclusion from the outset. It also makes structured content capable for global content integration and content interoperability, because it enhances its potential for being re-used and re-purposed in totally different eApplica­tions. Such content as well as the methods, tools and services applied can be subject to new kinds of certification schemes which also should be based on standards. Taking everything into account content must be totally reliable in some applications, e.g. in eAccessibility/ eInclusion. New methods and tools for certification, verification and validation are largely facilitated by standards-based data-models and standardized content, which will have an impact on future ICT-related standards in general. While thus increasing the reliability of data, risk of all sorts and liability will be reduced.
Received: 20-03-10 / Accepted: 20-04-10
How to reference this article:
Galinski, C. (2010). Standards-based Content Resources: A Prerequisite for Content Integration and Content Interoperability. Íkala, 15(2), pp.143-157.