scholarly journals Preschool children’s mathematical arguments in play-based activities

Author(s):  
Beate Nergård

AbstractThe present study examines the structure and mathematical content of children’s mathematical arguments as part of communication in play-based activities. It shows how Nordin and Boistrup’s (The Journal of Mathematical Behavior 51:15–27, 2018) framework for identifying and reconstructing mathematical arguments, which includes Toulmin’s model of argumentation, the notion of anchoring (Lithner, Educational Studies in Mathematics 67:255–276, 2008) and a multimodal approach, can be used to identify and explore preschool children’s mathematical arguments. Two different types of argument that occurred during play-based activities were identified: partial arguments and full arguments. The findings reveal the extensive use of multimodal interactions in all parts of the children’s mathematical arguments. Moreover, the findings point to the crucial role of adults as dialogue collaborators in the argumentation that emerges in the play-based activities.

2004 ◽  
Vol 10 (3) ◽  
pp. 324-335 ◽  
Author(s):  
S.P. Ringer ◽  
K.R. Ratinac

This work reviews recent research on the design and control of interfaces in engineering nanomaterials. Four case studies are presented that demonstrate the power of a multimodal approach to the characterization of different types of interfaces. We have used a combination of conventional, high resolution, and analytical transmission electron microscopy, microbeam electron diffraction, and three-dimensional atom probe to study polymer–clay nanocomposites, turbine rotor steels used for power generation, multicomponent aluminum alloys, and nanocrystalline magnetic materials.


2009 ◽  
pp. 245-251 ◽  
Author(s):  
Milica Ljaljevic-Grbic ◽  
Jelena Vukojevic

Fungal ability in production of pigments and organic acids have crucial role in discoloration and degradation of different types of stone in cultural heritage objects. Additionally, stone objects may support novel communities of microorganisms that are active in biodeterioration process. This investigation focuses on mycological analyses of microbial biofilm from two important buildings, made of granite and sandstone, and which were heavily colonized by fungi. The 23 fungal taxa including filamentous microfungi and yeasts with specific distribution on sandstone and granite substrate were isolated. Melanized fungi from Dematiaceae (Deuteromycotina) were dominant. The identified microfungi cause discoloration, as well as mechanical exfoliation of building stone material that was analyzed through mechanical hyphae penetration and production of dark pigments and organic acids.


Author(s):  
Kia Byrd ◽  
Saleh Alqahtani ◽  
Adam C. Yopp ◽  
Amit G. Singal

AbstractDespite advances in treatment options for hepatocellular carcinoma (HCC), 5-year survival for HCC remains below 20%. This poor survival is multifactorial but is partly related to underuse of curative treatment in clinical practice. In light of growing treatment options, delivered by different types of providers, optimal management requires input from multiple specialties. A multidisciplinary approach has been evolving over the past couple of decades, bringing different specialists together to develop a therapeutic plan to treat and manage HCC, which significantly increases timely guideline-concordant treatment and improves overall survival. The present review attempts to highlight the need for such a multimodal approach by providing insights on its potential structure and impact on the various aspects of HCC management.


2021 ◽  
pp. 089976402110574
Author(s):  
Hanna Schneider ◽  
Michaela Neumayr

Corporate volunteering (CV) is an increasingly common type of nonprofit-business collaboration and can take various forms, and its benefits for the business partner are well studied. The benefits for the nonprofit partner, however, are less evident and often questioned. This study investigates why nonprofits engage in and how they make sense of CV collaborations, building on the concepts of sensemaking and cognitive frames. Drawing on interviews with staff in nonprofit organizations, we reveal that decisions about CV collaborations usually go beyond the resources acquired through CV itself. We identify three different CV frames and show how they lead to different types of partnerships, hereby challenging the assumption that more integrative partnerships are superior to philanthropic ones. Our results show that depending on the frame used, different perceptions of the distribution of power between the nonprofit and the business partner exist, addressing the crucial role of how nonprofit organizations position themselves in such partnerships.


2014 ◽  
Vol 22 (2) ◽  
pp. 224-243 ◽  
Author(s):  
Daniel C. Burnston ◽  
Benjamin Sheredos ◽  
Adele Abrahamsen ◽  
William Bechtel

We explore the crucial role of diagrams in scientific reasoning, especially reasoning directed at developing mechanistic explanations of biological phenomena. We offer a case study focusing on one research project that resulted in a published paper advancing a new understanding of the mechanism by which the central circadian oscillator in Synechococcus elongatus controls gene expression. By examining how the diagrams prepared for the paper developed over the course of multiple drafts, we show how the process of generating a new explanation vitally involved the development and integration of multiple versions of different types of diagrams, and how reasoning about the mechanism proceeded in tandem with the development of the diagrams used to represent it.


2020 ◽  
Vol 28 ◽  
pp. 63-70
Author(s):  
María Valero Redondo

This article explores the different types of communities and the role of secrecy and counter-history in Arundhati Roy’s The God of Small Things (1997), a novel in which secrecy plays a crucial role and in which the most genuine human relations are characterized by a desire to participate in otherness. This article examines Roy’s subversion of the operative community by considering: (a) the different communitarian organizations in The God of Small Things, from the most organic (the caste system, patriarchy, religious institutions, communism and the commodification of culture) to the least organic (the community of Others and the community of lovers); (b) the connection between alterity, finitude and secrecy as preventing the unworked community from organicist fusion; (c) the link between alterity, finitude, secrecy and counter-history. Although ingrained within a deeply organicist community, the main characters in Roy’s novel prove to have a vigorous capacity to trespass communitarian boundaries and to expose themselves to otherness.


Cancers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 711
Author(s):  
Marta Justyna Kozieł ◽  
Karolina Kowalska ◽  
Agnieszka Wanda Piastowska-Ciesielska

Claudins are major integral proteins of tight junctions (TJs), the apical cell–cell adhesions that enable maintaining polarity of epithelial cells, their differentiation, and cell signaling. A number of studies have indicated that claudins might play a crucial role in both physiology and pathogenesis. Their tissue-specific expression was originally linked to the development of different types of cancer and triggered a hope to use them as diagnostic or prognostic markers. However, it seems that their expression is more complex than that, and undoubtedly, claudins participate in one of the most important molecular events in cells. This review summarizes the recent research evaluating the role of claudins in fertility and the most common endocrine-dependent cancers in the reproductive system and highlights the crucial role of claudins both in human fertility and the most common cancers.


2016 ◽  
Vol 86 (3-4) ◽  
pp. 127-151 ◽  
Author(s):  
Zeshan Ali ◽  
Zhenbin Wang ◽  
Rai Muhammad Amir ◽  
Shoaib Younas ◽  
Asif Wali ◽  
...  

While the use of vinegar to fi ght against infections and other crucial conditions dates back to Hippocrates, recent research has found that vinegar consumption has a positive effect on biomarkers for diabetes, cancer, and heart diseases. Different types of vinegar have been used in the world during different time periods. Vinegar is produced by a fermentation process. Foods with a high content of carbohydrates are a good source of vinegar. Review of the results of different studies performed on vinegar components reveals that the daily use of these components has a healthy impact on the physiological and chemical structure of the human body. During the era of Hippocrates, people used vinegar as a medicine to treat wounds, which means that vinegar is one of the ancient foods used as folk medicine. The purpose of the current review paper is to provide a detailed summary of the outcome of previous studies emphasizing the role of vinegar in treatment of different diseases both in acute and chronic conditions, its in vivo mechanism and the active role of different bacteria.


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