bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nurturing Sustainability in Agricultural Firms: The Role of Relational Marketing with Stakeholders and the Moderating Influence of Firm’s Attitudes Toward Sustainability
Authors: García-Agüero Ana Isabel , Terán-Yépez Eduardo , Belmonte-Ureña Luis J. , Camacho-Ferre Francisco 
Published: November 2024

AbstractThis study delves into the strategic intersection of sustainability practices, relational marketing, and firm attitudes in the agricultural sector, emphasizing the imperative of balancing economic viability with environmental responsibility. As global concerns over climate change, resource depletion, and ethical sourcing escalate, the agricultural industry faces unprecedented challenges that necessitate innovative and enduring solutions. Drawing on stakeholder theory, the study proposes a conceptual framework that integrates a firm’s relational marketing with stakeholders and the implementation of sustainable practices while considering the moderating influence of firm attitudes toward sustainability. The research underscores the pivotal role of stakeholders in driving agricultural firms toward sustainable initiatives, highlighting the positive impact of strong relationships on the adoption of sustainable practices. By fostering collaborative partnerships and demonstrating a firm commitment to sustainability, companies can enhance their social and environmental responsibility while strengthening their competitive advantage. The study also explores the moderating effect of firm attitudes towards sustainability, emphasizing the importance of proactive organizational attitudes in facilitating the relationship between relational marketing and sustainable practices implementation.
Methods for Managing the Tacit Knowledge of Employees with Long Scientific Seniority Using the Example of Research Institutions. Preliminary Assumptions
Authors: Tomiczak Katarzyna H. 
Published: November 2024

Abstract
Tacit knowledge management among employees with long scientific seniority within research institutions in Poland and the European Union is being discussed. The key question under analysis is: How should the tacit knowledge of employees with long scientific seniority be managed to preserve their legacy and facilitate its transfer to younger generations? As a part of a doctoral thesis, this study aims to verify and develop methods to support the management of tacit knowledge of employees with long scientific seniority in construction institutions. To achieve this, research comprising surveys and in-depth interviews will be conducted among employees of research institutions. The anticipated outcome of this study is a comprehensive method for tacit knowledge management, which includes elements such as an environment supporting knowledge transfer, cooperation techniques, and age diversity management. The insights from this research could provide a foundation for further investigation in other regions and disciplines, ultimately leading to a deeper understanding of the process of transferring tacit knowledge of senior researchers.
Foamed Concrete Reinforced with Polypropylene Fibers and Geotextile in Geotechnical Applications
Authors: Kadela Marta , Drusa Marian 
Published: November 2024

Abstract
Foamed concrete is known as lightweight or cellular concrete. It is commonly defined as a cementitious material with a minimum of 20% (by volume) mechanically entrained foam in the mortar mix where air-pores are entrapped in the matrix by means of a suitable foaming agent. Although the foamed concrete has been patented in 1923, it is mainly used as a filling or leveling material. The use of foamed concrete has been limited e.g. for backfilling retaining walls. As a material used in contact with the ground, it is a relatively new material. In order to use foamed concrete in road construction as a replacement for hydraulically bound mixtures, the improvement of foamed concrete was considered. The article presents the two different type of polypropylene reinforced of foamed concrete. Polypropylene fibers with content of 0.3 kg/m3 and 6.37 kg/m3 were used. For foamed concrete samples with addition of 6.37 kg/m3 PP fibers, the splitting tensile strength increased. In second case, the polypropylene geotextiles with weight 150 g/m2, 200 g/m2 and 500 g/m2 were used. It can be observed that flexural strength for foamed concrete reinforced with geotextile samples was higher compared to the base (unreinforced) foamed concrete sample. On this basis, the suitability of using reinforced foamed concrete in the road pavement-subsoil system was determined.
Polypropylene Fiber Reinforced - Latex Modified Mortar for Installation of Granite Paving Blocks on Various Road Sections
Authors: Šušteršič Jakob , Ercegovič Rok , Drolc Sandi , Kabashi Naser 
Published: November 2024

Abstract
The paper discusses the use of Polypropylene Fiber Reinforced - Latex Modified Mortar (PFR-LMM) for installation of granite paving blocks (GPBs) on various road sections in Slovenia. The following four examples are considered: two inner rings of roundabouts on both sides of the bridge over the Sava River on the bypass near Krško, a roundabout in front of the entrance to the Šoštanj thermal power plant and one part of a street in Ljubljana. GPBs were installed on a slab made with Steel Fiber Reinforced Concrete (SFRC). The workability of the fresh PFR-LMM had to be such that it filled the joints between the GPBs. Hardened PFR-LMM, however, must provide a good bond between the GPBs to ensure resistance to traffic loads and resistance to constantly changing weather and temperature influences. The age of the subject applications is between 5 and 11 years.
Optimization of Eco-Sustainable, Form-Stable Phase Change Material to Be Incorporated in Aerial-Lime-Based Mortars
Authors: Guzmán García Lascurain Paulina , Amendola Alessandro , Frigione Mariaenrica , Sarcinella Antonella , Toniolo Lucia , Goidanich Sara 
Published: November 2024

Abstract
The building sector faces a challenge to find innovative and sustainable ways to increment the energy-efficiency of buildings and reduce their environmental impact. Recently, the incorporation of phase change material (PCM), based on a polymeric active phase (PEG-1000) in waste stone aggregates, has proven to be a promising option to be used for building restoration. Mortars that include PCM aggregates demonstrated to have favorable thermal properties, that would lead to a reduction of energy requirement for heating/cooling needs. However, the inclusion of aggregates impregnated by PEG causes a reduction in the mechanical properties of the mortars possibly due to (i) a lack of compatibility between aggregate and binder, or (ii) a problem with the confinement of the PEG, causing its dispersion in the mortar. Therefore, the aim of this study was to investigate the causes associated to the reduction of the mechanical properties and propose a method to prevent it. Preliminary results showed that, given its high water solubility, the PEG 1000 included in the stone aggregates tends to be washed away when these aggregates are incorporated in the mortar mixture. This hypothesis was confirmed by FTIR spectroscopy. Therefore, an additional confinement method using a layer to coat the stone aggregates impregnated by PEG 1000 was proposed in this study. Different materials were tested as coating layer: powder calcium hydroxide, milk of lime (suspension of Ca(OH)2 in water), pozzolana, and cocciopesto. Carbonated mortar samples using the proposed coated aggregates were, then, analyzed using FTIR to evaluate the efficiency of this encapsulation methodology. Preliminary results suggested a relevant improvement in terms of PEG confinement.
Sustainable Development Approach for 3D Concrete Printing
Authors: Kaszyńska Maria , Skibicki Szymon 
Published: November 2024

Abstract
In the current era, sustainability has gained significant importance within the field of civil engineering. The promising technology of 3D printing for cementitious materials addresses the mentioned challenges. This study provides a briefly overview of the sustainable approach to 3D printed concrete, covering both technological and material aspects. The paper presents a thorough analysis of the essential properties of 3D printed concrete from a sustainable perspective. Specifically, the composition of binders and aggregates is examined in relation to sustainable development. In case of technological aspects various research studies have demonstrated that the mentioned aspects of 3D concrete printing have the potential to achieve a minimum reduction of 50% in CO2 emissions. Furthermore, modifying materials can help protect natural resources from depletion, and the use of alternative binders can further reduce CO2 emissions. The findings presented in this work pave the way for new directions in future research endeavors.
Evolution of Early-Age Mechanical and Failure Behavior of 3D Printed Polymer Concrete
Authors: Najvani Mohammad Amin D. , Murcia Daniel Heras , Taha Mahmoud Reda 
Published: November 2024

Abstract
The increasing interest in 3d printing of concrete for infrastructure applications necessitates having a design for this process. Previous research has mostly focused on 3D printable cement-based concrete mixes, with less attention given to 3D printed polymer concrete (PC). PC is a concrete type that uses polymer instead of cement as a binder. It offers improved compressive and tensile strengths, crack resistance and bond strengths, and superior durability than traditional Portland cement concrete, making it an excellent material for 3D printing. This study aims to understand the evolution of the early-age mechanical properties of fresh polymer concrete and its potential failure during printing. Unconfined uniaxial compression and direct shear tests were performed on fresh polymer concrete for the first 110 min after mixing to determine the evolution of mechanical and failure characteristics with time. Such characteristics include compressive strength, modulus of elasticity, cohesive strength, and friction angle. A time-dependent early-age Mohr-Coulomb failure envelope is established to describe the mechanical and failure behavior of 3D printed polymer concrete.
Soft Means of Concrete Modification – Curing Conditions
Authors: Woyciechowski Piotr , Jackiewicz-Rek Wioletta , Jaworska Beata 
Published: November 2024

Abstract
Concrete curing is an important activity from the point of view of shaping all the properties of concrete, and the way it is carried out depends primarily on the type of binder used. The optimal care effect is a kind of soft method of positive modification. Choosing such an optimal method is not an easy task, especially if the composite contains a complex binder whose components have different care requirements. The article review considerations on the optimal method of polymer-cement concrete curing, as well as the possibility of using various forms of polymers in the curing process of cement concretes.
Neutron Radiation Shielding of C-PC and Geopolymers
Authors: Piotrowski Tomasz , Prochoń Piotr , Wojtkowska Magdalena 
Published: November 2024

Abstract
The aim of the paper is to evaluate neutron shielding efficiency of ordinary concrete, heavy-weight concrete and geopolymer concrete modified with epoxy additive. Evaluation was based on neutron shielding efficiency calculations. Since the commonly used fast neutron effective removal cross-section calculation does not take into account thermal neutron absorption reactions, a method adopted from the fast neutron effective removal cross-section calculation based on the macroscopic cross-section calculation for compositions is therefore applied. The results confirmed that an efficient neutron shield requires a balanced mixture of light and heavy nuclei and polymer modification is a proper way for increasing neutron shielding efficiency.
Interactive Features in University Textbooks and Their Use by Teachers and Students
Authors: Mesa Vilma , Burley-Sanford Lelia , Hao Xinyi , Quiroz Carlos 
Published: November 2024

AbstractThe expansion of the field of interactive textbooks, thanks to the evolution and accessibility of production tools, has significantly facilitated basic research on these resources. There is building evidence in post-secondary education, that user interaction with learning resources (apps, videos, assessment systems) facilitate learning (Stains et al., 2018). Moreover, the field has been able to advance both theories and methods to investigate the use of these resources using real time data (Trouche, 2020a, 2020b; Trouche et al., 2020). In this context, we ask: to what extent does a teachers’ use of a particular textbook feature influence their students’ use of that feature?
Investigating Teachers’ Interactions with Textbooks: Findings from Secondary Mathematics Teachers in Shanghai, China
Authors: Fan Lianghuo , Xie Sicheng , Luo Jietong , Wang Yisu , Cheng Jing 
Published: November 2024

AbstractWe conducted a study on how Shanghai secondary mathematics teachers interact with textbooks. A conceptual framework was established for the study. Data were collected from 133 teachers in 13 randomly selected schools through a questionnaire survey and follow-up interviews with 24 of them. Results show that Shanghai mathematics teachers interacted with textbooks to a varying extent, and they adapted most frequently on mathematical thinking and methods, and least frequently on affects, attitudes and values. Meanwhile, mathematics teachers in high-performing schools and private schools adapted textbooks more frequently, while there was overall no statistically significant difference between teachers with different demographic features. Furthermore, teachers interacted more frequently with student books and teacher manuals than with exercise books. Implications and suggestions are discussed.
Examining Geometry in the Textbook and Teacher’s Guide at Middle School in the Light of Van Hiele’s Model and Didactical Phenomenology
Authors: Gebremichael Andualem Tamiru 
Published: November 2024

AbstractThis paper reports about a study undertaken on the mathematics textbook and teacher’s guide used at 6th grade in Ethiopia, with a particular focus on geometry. The study draws on a framework composed of van Hiele’s model of geometrical thinking and Freudenthal’s didactical phenomenology. The interest is to find out which levels of geometrical thinking are emphasized and whether phenomena familiar to Ethiopian children are used as context. Document analysis method is used. The results show that geometry topics mostly focus on analysis and informal deduction levels. The approach is usually contrary to van Hiele’s suggestion of order. Ethiopian grade six students are demanded to demonstrate formal deduction level. The study’s implications are set out.
Model Construction of GeoGebra Integrating High School Mathematics Teaching Under the Embodied Cognitive Horizon—Taking the “Elliptical Standard Equation” for Example
Authors: Geng Ning , Wu Hua 
Published: November 2024

AbstractSince education has entered a new era, information technology and classroom teaching have entered the stage of “deep integration”. Through the “elliptical standard equation” (the first class) teaching process, based on the three characteristics of the embodied teaching environment, construct the embodied cognitive horizon GeoGebra fusion high school mathematics teaching mode from the theoretical basis, teaching objectives, operation procedures, teaching evaluation, and analysis the classroom teaching four links “situational perception, embodied exploration, operation experience, reflection monitoring” with teaching advice, to provide a reference for basic education teaching and material development.
A Comparative Study on the Presentation of Preparatory Knowledge in the New Mathematics Textbooks for Senior High School in China
Authors: Yang Pei 
Published: November 2024

AbstractAs a special module added in the new curriculum standard of high school mathematics in China, the value of preparatory knowledge can't be underestimated. The special module are also added in the new high school mathematics textbooks published in 2019. This paper takes the preparatory knowledge in the new high school mathematics textbooks of People's Education version A, Beijing Normal University version & Hunan Education version as the research content, and analyzes the presentation of preparatory knowledge from two dimensions: the macro structure of the textbook and the main content. It is found that the three versions of textbooks have high consistency in the presentation of the main content; In the presentation of macro structure, they are distinctive. Then it puts forward three suggestions for textbook compilation, teachers’ teaching and students’ learning.
Opportunities to Learn Reasoning and Proving in the Algebra of NCM Mathematics Textbooks
Authors: Zhou Da , Liu Jinqing , Wu Qian , Ye Qingqing , Liu Jian 
Published: November 2024

AbstractMathematics textbooks play an essential role in providing students with learning opportunities for reasoning and proving (RP). Researchers showed that tasks used by teachers were directly related to those provided by mathematics textbooks. Yet, little is known about the learning opportunities offered by elementary textbooks for students to learn RP in China. This study analyzed six volumes of New Century Mathematics (NCM) textbooks, focusing on RP’s opportunities in written tasks based on a revised analytical framework. The results showed that the textbooks we analyzed in this study provide students with more opportunities to engage in the RP of the algebraic domain, especially in narrative sets. In addition, in terms of sub-components and representation, the opportunities provided by textbooks were different in narrative sets and exercise sets.
Exploring How the Senior High School Textbooks Support Students’ Learning of Mathematics
Authors: Wang Sikai , Xu Binyan 
Published: November 2024

AbstractMathematics textbooks are supporting materials for students’ learning of mathematics, the compilation of which should assist students in mathematics learning. PEP2019 was selected to analyse the design feature of the content of trigonometric function, and then to compare with PEP2004 in this article. On the basis of the content comparison, it reveals how PEP2019 supports students’ learning of trigonometric function. These insights also indicate the design of PEP2019 aligned with the ideas of mathematics curriculum reform.
Study on the Influence of Textbooks on Teachers’ Teaching: An NCM Story
Authors: Yu Guowen , Zhang Dan , Wu Jiaqi , Lin Danni 
Published: November 2024

AbstractIn this paper, we focus on NCM (New Century Mathematics) textbooks’ influence on teachers’ teaching. Based on the conceptual framework of Shulman and Fan, a survey with a questionnaire and interview was conducted. The data were collected from a stratified sample from Haidian District, Beijing. The results revealed the following: the textbooks facilitated mathematics teachers’ teaching, especially in the process of Transformation; the design of activities and columns of the NCM textbooks facilitated mathematics teachers’ teaching more obviously than other features; and compared with teacher characteristics, school characteristics played a more significant role on teachers’ response about how textbooks and the features facilitating their teaching.
Locally finite two-loop amplitudes for electroweak production through gluon fusion
Authors: Anastasiou Charalampos , Karlen Julia , Sterman George , Venkata Aniruddha 
Published: November 2024

Abstract
The computation of two-loop amplitudes for the production of multiple Higgs and electroweak gauge bosons via gluon fusion with exact dependence on quark masses relies primarily on numerical methods. We propose a framework that enables their numerical evaluation in momentum space. The method is inspired by the factorization of infrared divergences in QCD scattering amplitudes. It extends techniques introduced for electroweak gauge boson production from quark-antiquark annihilation to processes with external gluons. By combining diagrammatic integrands, we make use of local cancellations between diagrams that automatically eliminate most non-factoring infrared singularities. With a limited number of counterterms, we then derive two-loop integrands for which all soft and collinear singularities factorize locally. We hope that the local subtraction techniques presented in this article will play a useful role in extending the local factorization formalism to two-loop amplitudes for arbitrary processes.
Towards massive field-theory amplitudes from the cohomology of pure spinor superspace
Authors: Mafra Carlos R. 
Published: November 2024

Abstract
By analogy with the formula for the massless string disk amplitudes, we define massive field-theory tree amplitudes and conjecture that the BRST cohomology structure of pure spinor superspace fixes their form. We give evidence by deriving the pure spinor superspace expression of the massive field-theory n-point tree amplitude with one first-level massive and n − 1 massless states in two ways: 1) from BRST cohomology arguments in pure spinor superspace and 2) from the α′2 correction to the massless string amplitudes by inverting the unitarity constraint in superspace.
Ecosystem services of urban rivers: a systematic review
Authors: Sousa Maria Carolina , Martins Rita , Simões Nuno Eduardo , Feio Maria João 
Published: November 2024

Abstract
The multifaceted threats to global freshwater ecosystems, especially in urban environments, impact hydrological cycles, flora and fauna, habitats and ecosystem processes. While these ecosystems can potentially offer important services to the urban populations by providing natural areas inside cities, the constraints imposed by urbanisation and a high population density may result in the loss of those benefits. Thus, it is important to adopt a quantitative approach to assess the value of urban freshwater ecosystem services in order to enable strategic urban planning that balances urban development with the protection of these ecosystems. We have therefore performed a systematic review of Scopus database publications from 2006 to 2022 that focused on provisioning, regulating and maintenance, as well as cultural services, provided by urban river ecosystems. The screening identified 118 papers, 43% of which focused on urban stream ecosystems (stream and/or riparian area). For provisioning services, indicators were related to water and food supply, while regulation indicators were linked to water quality and flood mitigation; cultural services were mainly related to physical interactions with the ecosystems, education and aesthetic experiences. The economic valuation of urban river ecosystem services is the subject of study in 19% of the identified articles, mainly in relation to potential river restoration. Finally, 18% of articles incorporated public opinions of stakeholders and citizens, underlining the significant role of their input in understanding and managing urban river ecosystems. More studies on urban streams are needed, and standardising indicators and promoting greater citizen involvement in the evaluation of ecosystem services are challenges that remain to be overcome.
Erythema nodosum
Authors: Weber Viktoria , Weimann Konstantin , Kolm Isabel , Meier-Schiesser Barbara 
Published: November 2024

ZusammenfassungDas Erythema nodosum (EN) ist die am häufigsten auftretende Form einer akuten Pannikulitis. Es wird charakterisiert durch schmerzhafte, rote bis livide, erhabene Knötchen oder Beulen, die typischerweise symmetrisch im Bereich der Schienbeine auftreten. Häufig handelt es sich beim EN um eine Reaktion des Immunsystems auf Infektionen, entzündliche Erkrankungen oder Medikamente. In etwa der Hälfte der Fälle ist kein Auslöser zu eruieren. Nach Behandlung der zugrunde liegenden Ursache ist das EN in der Regel selbstlimitierend.