bluuebunny/crossref_metadata_2025 huggingface dataset:
Uso de macroinvertebrados bentônicos para análise integrada da Sub-Bacia do Ribeirão Conquistinha, afluente do Rio Grande (MG, Brasil)
Authors: Nascimento Moreira Gabriela , Cunha Biscalquini Amanda , Vieira Gonçalves Igor Augusto , Rodrigues da Silva Elcides , Milla dos Santos Senhuk Ana Paula , Borella Marfil Anhê Ana Carolina
Published: June 2024

O Ribeirão Conquistinha é um importante afluente do Rio Grande e sua sub-bacia recebe influência da ocupação urbana. Foi realizada avaliação da qualidade ambiental dessa sub-bacia utilizando macroinvertebrados bentônicos como bioindicadores, além de análises físico-químicas, microbiológicas e aplicação do Protocolo de Avaliação Rápida. Os resultados apontaram melhor qualidade das águas em regiões de mata ciliar, reforçando a sua importância na proteção do ecossistema. A redução significativa na qualidade ambiental foi observada nos locais que recebiam efluente industrial e doméstico, mostrando o seu efeito deletério sobre a comunidade biológica. Os locais com atividades rurais apresentaram qualidade da água intermediária. Assim, os resultados reforçam o uso dos bioindicadores para uma análise integrada da qualidade da água, indicando contaminação da sub-bacia e sugerindo graves impactos ambientais no metabolismo do ecossistema e na vida aquática.
Denture rehabilitation effect on elders’ nutritional status and quality of life
Authors: Vasconcelos Soares da Silva Thauany , Gomes Martins João Paulo , Nóbrega Gomes Lays , Abreu Pinheiro Mayara , Cavalcanti Yuri Wanderley
Published: June 2024

This study evaluated the effect of rehabilitation with complete denture on elders’ nutritional status and quality of life. Forty-nine edentulous patients were recruited. The dentures were made using the simplified method, as adopted by the Brazilian public health system. Three months later, subjects returned for revaluation. Eight of the 49 patients returned, under the assessments of the following parameters: body fat percentage; lean mass; Body Mass Index (BMI); nutritional status (MNA); and analysis of masticatory efficiency through colorimetric analysis of chewing gum; self-perception of quality of life in relation to health (SF-12); impact of oral health on the quality of life of edentulous people (OHIP-EDENT). Data were evaluated using the paired t test, considering p<0,05. There was a statistically significant reduction in the percentage of fat (p=0.031, MD= 2.475), increase in MNA score (p=0.010, MD= -2.375), greater impact on quality of life in relation to oral health (p=0.010, MD= -33.750) and improvement of masticatory efficiency (p=0.014, MD= 0.261). Rehabilitation with complete dentures can improve nutritional parameters and the masticatory efficiency. Nevertheless, some impact of oral health on quality of life can also be observed.
Avaliação de técnicas de restauração em área degradada desprovida das camadas iniciais de solo na Caatinga
Authors: Aguiar de Castro Raphaela , Daniele de Souza Patrícia , De Brito Rodrigues Léticia , Garcia Rodrigues Renato , Vinicius Meiado Marcos
Published: June 2024

O objetivo do estudo foi avaliar qual técnica de restauração florestal proporciona maior advento de riqueza, densidade, diversidade e cobertura vegetal da área em restauração. Para isso, foram testados os seguintes tratamentos: T1) Condução da regeneração natural; T2) Condução da regeneração natural com plantio de mudas; T2) Transposição de solo; T3) Transposição de solo com plantio de mudas. Os tratamentos foram conduzidos em 15 repetições. Após três anos, foi visualizado que para riqueza (média de 12,14 ± 3,77 espécies), densidade (média de 510,3 ± 222,9 indivíduos/m2) e cobertura (média de 90,26 ± 9,19%) não houve diferença entre os tratamentos. A colonização está sendo realizada majoritariamente por espécies herbáceas, nativas e anemocóricas, além de espécies arbustivas e arbóreas similares as áreas de referência positiva. As mudas plantadas que sobreviveram também não foram suficientes para contribuir no advento de novas espécies. Porém, o crescimento lento das arbóreas em campo pode gerar contribuições apenas a longo prazo. Portanto, as intervenções realizadas melhoraram os parâmetros gerais e os resultados mais expressivos foram observados nos tratamentos com maior intervenção. No entanto, a falta de efetividade de alguns tratamentos não proporcionou a diferença esperada entre eles.
Evaluation of conventional and microwave drying of tropical Amazonian wood indicated for the manufacture of EGP (Edge Glued Panels)
Authors: Araújo Roberto Daniel de , Nascimento Claudete Catanhede do , Nascimento Cristiano Sousa do , Kroessin Adilene , De Paula Estevão Vicente Cavalcanti Monteiro , Higuchi Niro
Published: June 2024

Wood drying is an important process in the forestry industry since the quality of manufactured products is directly related to the moisture content of the raw material. In the Amazon region, the complexity of the drying process is accentuated by the vast diversity of species, each with distinct technological profiles. This study focused on the evaluation of oven and microwave drying of five species of tropical Amazonian wood: Angelim-pedra (Hymenolobium pulcherrimum), Angelim-vermelho (Dinizia excelsa), Breu-vermelho (Protium puncticulatum), Murici (Byrsonima crispa) and Piaozinho (Micrandropsis scleroxylon), recommended for the production of laterally glued panels (EGP). Samples of these species were collected in areas of terra-firme forest in Amazonas, Brazil, and subjected to oven-dry for 25 days and in semi-industrial microwaves for 120 minutes (100 ± 3 °C). Additionally, analyses of the wood properties were carried out. The results indicate that microwave drying surpassed the efficiency of oven-dry. Specifically, Breu-vermelho and Murici wood presented the best results in terms of moisture content. This drying method not only significantly reduced the drying time but also resulted in defect-free wood. Furthermore, the energy consumption was lower compared to conventional drying. The physical-mechanical properties of wood showed a significant correlation with heat-treatment. In particular, microwave drying proved to be effective in obtaining standard moisture for manufacturing EGP panels and could be an advantageous alternative for the region.
Influência da suplementação alimentar na prevalência de parasitos e patógeno em colônias de Apis mellifera africanizada
Authors: Monteiro da Costa Miriam , Rodrigues Brito Ediane , Alves dos Santos Jefferson , Castor Modesto Vitor , Vasconcelos dos Santos Lima Mailin , Gomes Pinheiro Emmanuel Emydio , Dos Santos Farias Laécio , Paim Silva Irana , Maria Peixoto Cavalcante da Silva Samira , Lopes de Carvalho Carlos Alfredo , Da Silva Sodré Geni
Published: June 2024

A pesquisa objetivou testar suplementação mineral proteica na prevalência de Leptus sp., Varroa destructor e Vairimorpha sp. em colônias de Apis mellifera africanizada. O experimento foi em Delineamento Inteiramente Casualizado, com seis tratamentos e cinco repetições. Os tratamentos (exceto T1 – sem suplementação) foram elaborados à base de sacarose e água (xarope): T2- xarope; T3- complexo de aminoácidos comercial; T4- resíduo de levedura; T5- bentonita; T6- mistura resíduo de levedura e bentonita. Analisou-se a composição dos resíduos de leveduras e bentonita, consumo de alimento, peso das colônias, taxa de Leptus sp., V. destructor e níveis de microsporídio Vairimorpha sp. Diferentes teores de matéria seca, material mineral e proteína bruta foram encontrados nos tratamentos T4 (20,31; 4,89; 43,55), T5 (7,55; 50,70; 4,86) e T6 (13,41; 42,86; 26,90). O consumo médio de suplemento foi 79,20% e apenas no T1 houve diferença significativa no peso das colônias (8,70 kg = inicial; 6,80 kg = final). Observou-se diferenças significativas na taxa de V. destructor em T2 e T3, assim como nos níveis de infecção por Vairimorpha sp. em ambos os tratamentos (p ≤ 0,05). Conclui-se que T2 e T3 aumentaram a taxa de V. destructor e os níveis de infecção por Vairimorpha sp. Os tratamentos T4, T5 e T6 não apresentaram alterações significativas nas taxas de infestação por Leptus sp. e V. destructor ou infecção por Vairimorpha sp. T4 apresentou níveis proteicos e minerais ideais para dieta de A. mellifera africanizada.
Does the cutting time of Tifton 85 grass change the nutritional composition of the hay produced?
Authors: Cano Serafim Camila , Alexandre Boscaro de Castro Filipe , Yurika Mizubuti Ivone , Fernanda Nedel Pértile Simone , Pronievicz Barreto José Victor , Bonifácio da Silva Josemeyre , Hernandes de Oliveira Camila , Zundt Marilice , De Almeida Rego Fabiola Cristine
Published: June 2024

This study aimed to evaluate the chemical-bromatological composition of fresh grass and hay from Tifton 85 cut at different times of the day, as well as the potential losses from haymaking. The experimental design was a randomized block, assessing three cutting times: 11:00 AM, 2:00 PM, and 5:00 PM. We determined the contents of dry matter, neutral detergent fiber, acid detergent fiber, crude protein, protein insoluble in neutral detergent, acid detergent lignin, and in vitro digestibility of the collected samples. We also estimated values for cellulose, hemicellulose, non-fibrous carbohydrates, total carbohydrates, and total digestible nutrients of both fresh forage and hay. Losses of each nutritional component due to haymaking were calculated from the fresh and dried material after 72 h. Cutting time influenced the nutritional composition of Tifton 85 grass; grass cut at 2:00 pm exhibited a superior nutritional profile with higher in vitro digestibility of dry matter (73.22%), total digestible nutrients (69.15%), non-fiber carbohydrates (20.37%), and lower levels of neutral detergent fiber (67.75%) and cellulose (31.92%). Differences in haymaking losses were observed only for non-fiber carbohydrates at 2:00 pm, with a loss of 60.41%. The cutting time of Tifton 85 alters the quality of fresh forage but does not significantly affect the composition of hays produced from grass cut at various times of the day.
Índice trófico e qualidade da água balnear de praias no baixo rio Tapajós, Amazônia, Brasil
Authors: Junior de Souza Lemos Edvaldo , Pacheco Peleja José Reinaldo , Georgina de Freitas Goch Ynglea , Cristina Carvalho de Lima Flávia , Jesus Bacelar Rivolo
Published: June 2024

A degradação da qualidade ambiental, ocasionado principalmente por fatores antrópicos, causa impacto imediato aos cursos d’águas. Desta forma, monitorar os recursos hídricos é de fundamental importância para a manutenção da qualidade da água e para o bem-estar humano. Neste contexto, este trabalho visou investigar as condições espaço-temporal da qualidade das águas das praias da margem direita do baixo rio Tapajós, quanto ao Índice de Qualidade da Água (IQAs) e ao Índice de Estado trófico (IETs), no município de Santarém/PA. Para isso, amostraram-se ao longo da orla fluvial direita do Rio Tapajós nas seguintes praias: Muretá, Cajueiro, Ponta de Pedras, Pajuçara e Maracanã, e realizadas análises em campo e laboratoriais dos conjuntos de parâmetros fundamentais que compõe os índices IQA e IET. Foram realizadas quatros campanhas de monitoramento em duas fases da hidrógrafa fluvial: águas baixas (dezembro de 2015 e janeiro de 2017) e águas altas (maio de 2016 e maio de 2018). Os resultados apresentaram IQA variando de 67 ± 5,8 na praia do Maracanã no período das águas baixas a 77 ± 3,8 para a praia de Muretá no período das águas altas e IET com variação mínima (40 ± 7,5) e máxima (48 ± 6,8) registradas coincidentemente na praia do Pajuçara nas fases de águas baixas e águas altas, respectivamente. Estes resultados demonstraram que os índices avaliados, IQA e IET, apontam que as praias investigadas apresentam boa qualidade e baixo potencial de eutrofização.
Palavras-Chave: Qualidade Ambiental, Eutrofização, Rio Tapajós.
Assessment of antiproliferative activity of green-synthesized nickel oxide nanoparticles against glioblastoma cells using Terminalia chebula
Authors: Long Sui , Hui Lu , Yanli Dou , Dongdong Zhang , Feixiong Du , Weibing Wang
Published: June 2024

The present study investigates the effect of nickel oxide nanoparticles (NiO-NPs) on C6 glioma cells and develops a method for preparing NiO. Plant-based materials (leaf extract) can produce NPs efficiently and economically. Therefore, we developed NiO-NPs from Terminalia chebula leaf extract to reduce C6 glioblastoma cell proliferation. The structural, optical, and antimicrobial properties of NiO-NPs were investigated. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assays, Acridine orange/ethidium bromide dual staining, Hoechst 33342, and Rh123 staining were used to evaluate nuclear changes and mitochondrial membrane potential (MMP) in C6 glioblastoma cells. X-ray diffraction analyses revealed the cubic structures of the synthesized NiO-NPs, field emission scanning electron microscope analysis revealed polygonal NiO-NPs and an energy-dispersive X-ray spectrometer confirmed the high purity of the synthesized NiO-NPs. V. cholera, S. pneumonia, S. aureus, B. subtilis, P. aeruginosa, K. pneumonia, and C. albicans were sensitive to NiO-NPs. When NiO-NPs were applied at lower concentrations to rat glioblastoma C6 cells, they dose-dependently inhibited viability and induced apoptosis. Our findings show that NiO-NPs exhibit altered MMP and nuclear integrity. In this study, NiO-NPs were synthesized using T. chebula leaf extract, which has antiproliferative properties, and NiO-NPs increased cell cytotoxicity in C6 cells. Further exploration of NiO-NPs in glioblastoma animal models should be investigated.
Detecting treatment interference under K-nearest-neighbors interference
Authors: Alzubaidi Samirah H. , Higgins Michael J.
Published: June 2024

We propose a model of treatment interference where the response of a unit depends only on its treatment status and the statuses of units within its K-neighborhood. Current methods for detecting interference include carefully designed randomized experiments and conditional randomization tests on a set of focal units. We give guidance on how to choose focal units under this model of interference. We then conduct a simulation study to evaluate the efficacy of existing methods for detecting network interference. We show that this choice of focal units leads to powerful tests of treatment interference that outperform current experimental methods.
Identifying the Applications of Gamification for Audience Attraction in Public Libraries
Authors: Khademi Zare Sajjad , Varnaseri Ahmadreza , Bayati Niloufar
Published: June 2024

Gamification has emerged as an engaging approach to motivate participation and enhance experiences in diverse contexts. This study aimed to identify potential applications of gamification for attracting audiences to public libraries. Data was collected through semi-structured interviews with gamification experts, using purposive and snowball sampling, with thematic analysis revealing 16 main themes and 56 sub-themes. Our results show the potential of gamification to increase reading rates, help organize interesting events/challenges, and improve interactivity, the book lending process, library appeals, program awareness, user experience, educational activities, brand loyalty, participatory/volunteer activities, patron guidance, book searching, resource returns, marketing, and scientific/economic outputs in public libraries. This study highlights the fundamental and influential role of gamification in advancing public libraries and improving services in libraries. A dedicated gamification platform and system could enable libraries to engage librarian visitors, with further research needed to continue building knowledge in this emerging area.
Determination of Sexual Dimorphism and Morphological Variation of Pool Barb, Puntius sophore (Cypriniformes, Cyprinidae), Using Landmark Based Geometric Morphometric Analysis
Authors: Roy S. , Ray S. , Saikia S.
Published: June 2024

Geometric morphometrics is an efficient way to quantify biological shape variation and its covariation with other biotic or abiotic factors. The geometric information of an object is measured in a non-linear shape space after removing size, orientation, and position-related effects. This study was aimed to determine sexual dimorphism and morphological variation in body shape using landmark-based morphometrics by means of relative warp analysis. The indigenous freshwater fish Puntius sophore (Cyprinidae) was selected as the model organism for the study. Adult male and female individuals were collected during July-August 2019 (breeding season) and March–April 2019 (non-breeding season) from the ponds of Bolpur, West Bengal, India. Prior to analysis, the images were digitised using the appropriate fourteen landmarks and relative wrap analysis was performed using appropriate software. The results were then analysed, and the maximum relative displacements of adjacent landmarks were interpreted using canonical variate analysis (CVA) and principal component analysis (PCA). Significant body shape differences were found to be present in the non-breeding season and breeding season (male and female) populations of the species. Thus, geometric morphometrics can be used to understand the sexual dimorphism in natural populations of small fish species.
The Phenomenon of a Mixed Colony: the Case of Lasius brunneus and Lasius umbratus (Hymenoptera, Formicidae)
Authors: Stukalyuk S. , Radchenko Yu. , Akhmedov A. , Stelia V.
Published: June 2024

The aim of this work is to study to find out why, in the case of temporary social parasitism, a mixed colony of Lasius brunneus (Latreille, 1798) and Lasius umbratus (Nylander, 1846) exists in this state for many years. In 2023, a mixed colony of L. brunneus (host species) / L. umbratus (temporary social parasite) was discovered in Moldova. This mixed colony is located at the same site where another mixed colony containing Lasius fuliginosus (Latreille, 1798), L. umbratus disappeared in 2017. Video recordings of the intensity of movement of workers of the two species along the trails were made to study the frequency of antennal contacts and to calculate the colony population. Based on the previously used algorithms, it was assumed that the queen oviposition rate of L. umbratus is 1.5 times higher than that of L. niger, while that of L. brunneus is comparable to that of Lasius niger (Linnaeus, 1758). Chi-square test and post-hoc Dunn's test were used for statistical analysis of the data. Mathematical modelling was used to analyse the rate of colony development. Results of the analysis of worker activity on the trail showed that L. brunneus had 11 times more foragers than L. umbratus. A high number of interspecific antennal contacts between workers was recorded. The population of the mixed colony was estimated to be 48.880 L. brunneus and 24.433 L. umbratus workers. Mathematical modelling confirmed the failure of L. brunneus monogyny in a mixed colony and suggested that high L. brunneus abundance is ensured by multiple queens (oligogyny). Probably in 2021, the L. brunneus colony moved to a new habitat, which was invaded by the L. umbratus queen. After the invasion, several L. brunneus queens survived, allowing a mixed colony to exist.
Morphometric Analysis and Interrelationship of Seven Indonesian Hornbill Species (Aves, Bucerotidae) Utilizing Principal Component and Cluster Analyses
Authors: Jarulis J. , Solihin D. D. , Mardiastuti A. , Prasetyo L. B. , Novarino W.
Published: June 2024

In this comprehensive study, we examined 15 distinct morphometric characteristics within seven Indonesian hornbill species. Precise measurements of these morphometric traits were obtained using 0.1 mm calipers and a 1000 mm measuring tape. Our analysis encompassed a total of 85 individuals representing seven hornbill species: Anthracoceros albirostris (18 individuals), A. malayanus (4 individuals), Aceros cassidix (3 individuals), Rhyticeros plicatus (7 individuals), R. undulatus (36 individuals), Buceros bicornis (1 individual), and B. rhinoceros (16 individuals). To elucidate the morphometric ratio data, we employed a robust analytical approach involving the Principal Component Analysis (PCA), Discriminant Analysis, and Cluster Analysis. Our findings underscored a clear separation between hornbill genera, primarily attributed to a combination of PC1 (pertaining to body length) and PC3 (associated with beak morphology). Key morphometric traits that delineated these genera on PC1 included tail length, beak length, horn length, total length, and wing length. Meanwhile, on PC3 (characterizing beak morphology), the distinguishing features encompassed beak width, horn width, and tarsus length. Additionally, our analysis unveiled the characteristics that distinguish species within the genera Anthracoceros and Rhyticeros to be a composite of tail length and head length. This discerning morphometric data facilitated the clustering of seven hornbill species into two distinct groups: Group I comprised A. albirostris and A. malayanus, while Group II included R. plicatus, R. undulatus, A. cassidix, B. rhinoceros, and B. bicornis. Notably, these groups exhibited a 31.93% degree of similarity. This dataset holds immense potential for facilitating genetic classification and comparative studies of Indonesian hornbills.
Perspectives and Practices of Elementary Teachers Using an Internet-Based Formative Assessment Tool: The Case of Assessing Mathematics Concepts
Authors: Martin Christie S , Polly Drew , Wang Chuang , Lambert Richard G , Pugalee David K
Published: June 2024

This study examined the influence of professional development on elementary school teachers’ perceptions of and use of an internet-based formative assessment tool focused on students’ number sense skills. Data sources include teacher-participants’ pre and post survey,
open ended response on post survey, use of the assessment tool and their written responses completed during online professional development modules. Through an inductive analysis of teachers’ written reflections and open ended survey response, participants reported that the use of the
formative assessment tool supported their instruction, provided opportunities for teacher collaboration, and served as a vehicle for teachers’ own professional learning. A quantitative analysis of the pre and post survey indicated a statistically significant increase in teacher practices
to be more student centered. Implications for future research related to professional development focused on supporting teachers’ internet-based tools are also shared.
Teaching Undergraduate Mathematics using CAS Technology: Issues and Prospects
Authors: Tobin Patrick C. , Weiss Vida
Published: June 2024

The use of handheld CAS technology in undergraduate mathematics courses in Australia is paradoxically shrinking under sustained disapproval or disdain from the professional mathematics community. Mathematics education specialists argue with their mathematics colleagues over a range
of issues in course development and this use of CAS or even graphics calculator technology in assessment is a serious sticking point. We review some of the issues in the literature and established local practice and prospects for change within tertiary mathematics with reference to international
concerns and the experience in the secondary sector. Problems identified could argue for increased technology use in service courses.
Using an Iceberg Intervention Model to Understand Equivalent Fraction Learning when Students with Mathematical Learning Difficulties use Different Manipulatives
Authors: Westenskow Arla , Moyer-Packenham Patricia
Published: June 2024

This study examined variations in 43 fifth-grade Tier II students’ learning of equivalent fractions using physical and virtual manipulatives during intervention instruction. The overarching research question focused on how different manipulatives types support learning fraction
sub-concepts during mathematics intervention instruction for students with mathematical learning difficulties. Over a three-week period, students participated in ten small group sessions using different manipulatives during instruction (physical, virtual, and combination). Data were collected
from pre/post testing and daily monitoring assessments. An Iceberg Intervention Model was used to document student learning for five equivalent fraction sub-concepts and nine general fraction sub-concepts. Results showed that physical manipulatives were favoured for 5 sub-concepts, virtual
manipulatives for 4 sub-concepts and combined manipulatives for two sub-concepts. The results demonstrate that an understanding of relationships between manipulative type and equivalent fraction subtopics can be used to guide the use of manipulatives during intervention instruction.
An Instrumentation Theory View On Students’ Use Of An Applet For Algebraic Substitution
Authors: Jupri Al , Drijvers Paul , van den Heuvel-Panhuizen Marja
Published: June 2024

In this paper we investigated the relationship between the use of a digital tool for algebra and students’ algebraic understanding from an instrumentation theory perspective. In particular, we considered the schemes that students developed for algebraic substitution using an
applet called Cover-up. The data included video registrations of three seventh-grade Indonesian students (12-13 year-olds) using the applet. The results showed that while solving equations and related word problems, the students developed schemes for algebraic substitution in which technical
skills and conceptual understanding are intertwined. The schemes gradually were adapted to solve larger classes of equations. We found that crucial factors in this development called instrumental genesis are the characteristics of the applet and the task design, the role of a teacher, and
the interaction among students.
Institutionalising Virtual Math Resources at an HBCU
Authors: Mirani Mozhgan , Ramon Abby E.
Published: June 2024

This paper describes the work of a five-year grant project for the purpose of creating and institutionalising virtual mathematics resources (i.e., short video lessons) for general education mathematics courses at a Historically Black College/University (HBCU) in the US for the improvement
of student learning. The project was successful in creating full series of lectures for courses into videos and making them accessible to all students of the university at all times. Some data illustrating the impact of these efforts on performance and students’ experiences is also presented
and discussed. For each course, we compared the passing rates of students who watched the video lessons with those of students who did not watch the videos. Passing rates for students who watched the videos were consistently higher than for students who did not watch, and the majority of student
feedback indicated videos were viewed as helpful.
Exploring the Relationship between the Use of Technology with Enacted Tasks and Questions in Elementary School Mathematics
Authors: Polly Drew
Published: June 2024

This study explored the relationship between technology use, tasks, and questions posed during mathematics lessons in three elementary school classrooms. Teachers were observed between 21 to 30 times per classroom during the year. Data was recorded about the types of technologies,
mathematical tasks, and questions observed. Chi-square tests for independence released statistically significant relationships between several technologies and the types of mathematical tasks and questions enacted. Specifically, interactive whiteboards and internet-based activities were primarily
associated with highlevel tasks and questions, while iPad activities were used to implement low-level tasks and questions. Implications from this study include the need for further studies on teachers’ use of technology while simultaneously addressing the enactment of high-level mathematical
tasks and questions.
The Effect of Using Dynamic Mathematics Software: Cross Section and Visualization
Authors: Kösa Temel
Published: June 2024

The main purpose of this study is to determine the effects of using dynamic mathematics software on pre-service mathematics teachers’ ability to infer the shape of a cross section of a three-dimensional solid, as well as on their spatial visualization skills. The study employed
a quasiexperimental design with a control group; the Purdue Spatial Visualization Test (PSVT) and Santa Barbara Solid Test (SBST) were applied as pre- and post-tests. There were 48 students in the experimental group and 49 students in the control group. While the students in the experimental
group took a course in a computer laboratory, the control group took the same course in their regular classroom. The results of the study showed that using dynamic mathematics software had a positive effect on pre-service mathematics teachers’ ability to infer the cross section of three-dimensional
solids and on their spatial visualization skills.
Teaching Pre-service Teachers to Make Digital Stories that Explain Complex Mathematical Concepts in a Real-World Context: The “Math-eo” Project, Creating “Cool New Tools”
Authors: Walters Lynne Masel , Green Martha R. , Goldsby Dianne , Walters Timothy N. , Wang Liangyan
Published: June 2024

This mixed methods study examines whether engaging in a problem-solving project to create Math-eos (digital videos) increases pre-service teachers’ understanding of the relationship between visual, auditory, and verbal representation and critical thinking in mathematics. Additionally,
the study looks at what aspects of a digital problem solving project support pre-service teachers’ ability to integrate digital technology in mathematics education. Results indicated that, as pre-service teachers worked through the writing/problem solving process and constructed digital
stories, or Math-eos, they became more aware of the advantages of using this multimodal approach to teach mathematical concepts to elementary and middle school students. The Math-eo Project provided pre-service teachers, who typically used digital media only for socializing and meeting web-based
course requirements, with a new tool for their own learning and teaching. Designing Math-eos also enabled them to integrate digital technology in the mathematics curriculum with the aim of increasing student engagement, motivation and knowledge.
The New Technologies in Mathematics: a Personal History of 30 years
Authors: Villa Agustín de la , García Alfonsa , García Francisco , Rodríguez Gerardo
Published: June 2024

A personal overview about the use of new technologies for teaching and learning mathematics is given in this paper. We analyse the introduction of Computer Algebra Systems with learning purposes, reviewing different frameworks and didactical resources, some of them generated according
the philosophy of the European Area of Higher Education. Elearning was an important stage in new technologies. We discuss the different possibilities: learning content management system, e-assessments, projects, etc. The paper is completed with some comments about the mobile learning.
Dynamic Geometry Software And Tracing Tangents In The Context Of The Mean Value Theorem: Technique And Theory Production
Authors: Martínez-Hernández Cesar , Ulloa-Azpeitia Ricardo
Published: June 2024

Based on the theoretical elements of the instrumental approach to tool use known as Task-Technique-Theory (Artigue, 2002), this paper analyses and discusses the performance of graduate students enrolled in a Teacher Training program. The latter performance relates to tracing tangent
lines to the curve of a quadratic function in Dynamic Geometry Software, within the context of the Mean Value Theorem. The purpose of the paper is to show how usage of Dynamic Geometry can be helpful in promoting production of techniques and theory in the context of the Theorem, based on its
geometric interpretation. The results illustrate the pragmatic and epistemic role of the Dynamic Geometry Technique.
Modelling in action. Scaffolding High School Students to Higher Levels of Autonomy: The School’s Elevator and the Inverse Problem
Authors: Rivas Eugenia Marmolejo
Published: June 2024

In this paper, we focus our discussion on the strategy we follow to scaffold high school students to successfully build models of a real-life system. Our aim is for students to gradually achieve a higher level of autonomy and to use and further develop their mathematical knowledge.
We present work students did when we asked them to build a model of the position of the school’s elevator. Most students successfully built sound one-expression models. Those who did not, built an elegant piecewise model. They achieved this by working on the inverse problem, an exciting
proposition for students at any level. Crucial to the group’s success was the use of tracking software commonly used in physics, and dynamic mathematical software that empowers students to explore their models.
Using Technology for Digital Mathematics Textbooks: More than the Sum of the Parts
Authors: Bokhove Christian
Published: June 2024

This paper suggests a set of key features that might be appropriate when talking about digital textbooks or etextbooks for mathematics education. The set of features are presented in a coherent framework and the paper will discuss each of the six features: widgets, interactivity,
feedback, storing results, instructional design, authorability, interoperability and standards. I will argue, though, that these individual features are ‘more than the sum of the parts’; in other words that it’s the fact they are integrated into one e-textbook design that
makes them useful. I try to support this by reframing the question to ‘what will we miss if the feature wouldn’t be there?’
Nonverbal Elements in the Context of Didactic Transposition
Authors: Günzel Martin , Suchopárová Tereza , Binterová Helena , Šulista Marek
Published: June 2024

In this paper, the authors present results of their pilot research on nonverbal elements’ perception. They pay attention to a not yet well established system of evaluation in mathematics textbooks from the perspective of nonverbal elements and sum up their findings from pilot
researches on pupils’ operations with nonverbal elements. Pilot surveys were conducted in a lower secondary school during geometry lessons. The pupils were assigned activities about the transfer of knowledge, inquiry based learning and working with mental representations. Findings of
this pilot survey are coherent with a wider context of textbooks’ evaluation from nonverbal elements’ perspectives and serve as a basis for further research.
An Example how Geogebra can be Used as a Tool for STEM
Authors: Budinski Natalija
Published: June 2024

In this paper we display an example of how educational software Geogebra can be used as a tool for the STEM education. Geogebra is used in the process of introducing students in high school to mathematical models of materials science. Scientific results from materials science experiments
were used for mathematical modelling and learning about the properties of mathematical functions.
GeoGebra in Teaching of Primary School Mathematics
Authors: Korenova Lilla
Published: June 2024

The teaching of primary school mathematics is greatly oriented towards the development of basic mathematical literacy and cognitive skills such as remembering, understanding and applying (according to Bloom’s revised taxonomy). Nowadays, it is very important to implement teaching
methods that are motivating for children and lead to more effective teaching and learning. The use of digital technology such as interactive boards, tablets and smartphones with suitable software and applications is appropriate for children in this digital age. This contribution intends to
point out the possibilities of GeoGebra software as an effective tool for teaching mathematics for children between 9 and 11 years of age. We created and circulated a questionnaire to determine the use of technology by primary education teachers in Slovakia and Hungary, and their opinions
and experience concerning GeoGebra software. We will also show the results of the qualitative research through which we studied the possibilities of teaching geometry by using GeoGebra.
Bringing More STEAM to Mathematics Education
Authors: Solin Pavel
Published: June 2024

Most students view mathematics as something that is “nerdy and sophisticated” rather than “creative and artistic”. In this paper we present a way of exposing the creative and artistic aspect of math through simple visual coding and 3D modelling projects that
can be done in any modern web browser. Note that Art is rich in geometric shapes and repeating patterns. Think of mandalas, mosaics, Southwestern pottery, Native American symbols. Many of these patterns start with a basic shape or line, which can then be repeated, rotated, and combined with
other shapes to form beautiful and complex designs. Through these art projects, it is possible to attract to mathematics, coding and 3D modelling girls and many other students who otherwise would not be interested.
An Activity Structure for Supporting Students’ Coordination of Computer Algebra Systems and Paper-and-Pencil Across Phases of Curriculum
Authors: Fonger Nicole L.
Published: June 2024

In this study I examine the issue of how to support students’ coordination of computer algebra systems (CAS) and paper-and-pencil in solving mathematics problems. Together with a classroom teacher I designed and conducted a collaborative teaching experiment in a ninth-grade
algebra classroom to understand how to support students’ coordination of tools. I introduce a predict-act-reflect-reconcile activity structure for coordinating CAS and paper-and-pencil in solving problems involving linear expressions and equations and adopt this as an analytic lens to
examine the role of curriculum materials on impacting students’ learning. Findings suggest the activity structure of predict-act-reflect-reconcile is a potentially fruitful starting point for coordinating CAS and paper-and-pencil in classroom activity, but not sufficient on its own as
a task design principle without focused classroom discussion and support during the enacted curriculum. This research points to the importance of teaching students how to communicate about their process of using multiple tools while solving problems, especially the mathematical thinking that
students engage in while reconciling differences across toolbased representations.
Indicators of CAS use: Determining CAS use through analysis of written solutions
Authors: Ball Lynda
Published: June 2024

This paper provides a set of five indicators of CAS use, which provide a means to analyse a student’s written solution to determine whether they used CAS for solving a given problem. These indicators provide a way for researchers and teachers to determine CAS use without requiring
classroom observation or the explicit recording of extra information by students about CAS use for solving problems.
Teaching with Virtual Reality: Crafting a Lesson and Student Response
Authors: Goehle Geoff
Published: June 2024

This paper presents a “virtual reality” based lesson for a common Calculus topic, including a description of how the lecture was implemented in both a virtual reality and an augmented reality hardware system. This lesson was delivered to a number of calculus classes and
we describe the student response to the lesson via a quiz and a survey. We conclude with some general impressions on this emerging technology.
Visualizing and Understanding Regression and Correlation Using Dynamic Software
Authors: Gordon Sheldon P. , Gordon Florence S.
Published: June 2024

This article illustrates ways that dynamic software using some sophisticated techniques in Excel can be used to demonstrate fundamental ideas related to regression and correlation analysis to increase student understanding of the concepts and methods in elementary statistics courses
and in courses at the college algebra/precalculus level that stress ideas on curve fitting techniques.
Graphics Calculators in the Primary Classroom: Student-Teachers’ Beliefs and the TPACK Framework
Authors: Honey S.
Published: June 2024

This paper addresses a gap in the literature on primary student-teachers’ use of graphics calculators. A group of 12 student-teachers, specialising in mathematics, engaged in a mathematical task as learners, and then adapted the task for primary pupils. Their lesson plan included
graphics calculators, which the student-teachers taught to a class of primary pupils as part of their placement. Recordings of discussions, and notes from the lesson observations, were examined using the TPACK framework (Koehler et al, 2013). Findings suggest student-teachers are strongly
influenced by their prior experiences and beliefs about graphics calculators. Despite demonstrating good levels of TPACK, studentteachers’ beliefs and attitudes re-emerged and superseded their positive experience of teaching with graphics calculators. The ‘TPACK+’ framework
is proposed, which recommends that beliefs and attitudes should be taken into account, as well as technological, pedagogical and content knowledge.
“What If Not” Strategy Applied to Open-Ended Stimulating Problem Posing in Inquiry-Based Geometry Classes
Authors: Oxman Victor , Stupel Moshe , Jahangiri Jay M.
Published: June 2024

It has been more than two decades since researchers advocated the inquiry-based instruction in their classes. The idea, as appealing as it is in the theory, appeared not to be as fruitful in implementation. There are reports of students’ resentments, frustrations, withdrawals,
as well as challenges that instructors faced in their choice of appropriate and stimulating geometry problems. The present article is intended to exactly address these problems by exploring new ideas and presenting examples of open-ended geometry problems for future research and experimentation.
The ideas and strategies presented here can be used in almost all instructional settings in general and for pre-service and in-service geometry teacher education students, in particular.
App for Addition and Subtraction of Integers
Authors: Verzosa Debbie Marie B. , De Las Peñas Ma. Louise Antonette N. , Aberin Maria Alva Q. , Garces Len Patrick Dominic M.
Published: June 2024

This paper presents a mobile app, AlgeOps, created to assist students in understanding addition and subtraction of integers. The design of the app amalgamated the neutralization model (based on cancelling integers of opposite signs) and the number line model to offer a more holistic
representation of integers. Furthermore, since AlgeOps presents two objects, boxes and balloons, the learning objective may be extended to adding and subtracting polynomials. Pre- and post-assessments, student observations and interviews with teachers and students revealed the app can increase
performance, facilitate conceptual development, and increase engagement in tasks involving integer addition and subtraction.
Visualizing and Understanding Sampling Distributions Using Dynamic Software
Authors: Gordon Sheldon P. , Gordon Florence S.
Published: June 2024

This article illustrates ways that dynamic software using some sophisticated techniques in Excel can be used to demonstrate fundamental ideas related to sampling distributions and their properties to increase student understanding of the concepts and methods in elementary statistics courses. The article considers such sampling distributions as the distributions of sample means, sample medians, sample modes, sample midranges, sample proportions, and differences of sample means and examines how they depend on the underlying population and on the sample size of the repeated random samples drawn from the population.
Towards a Theoretical Foundation for Quality Tablet App-Enriched Learning Environments in Primary School Mathematics Education
Authors: Donevska-Todorova Ana
Published: June 2024

There has been much research about tasks and learning environments but not yet sufficient regarding those involving mobile technologies for mathematics education. This paper discusses the quality of the expanding amount of tablet applications for primary school mathematics and their
eloquent integration in student-centred learning environments (LE). It argues that students’ engagement in LE with tablet apps does not necessarily start with a particular a priori task designed within the LE and through a task-format, as by now reported in literature. An engaging design
of touchpad apps may rather encourage explorative activities leading towards a single task formulation and its solution as a result of that process. The paper further aims at framing essential characteristics and potentials of environments enriched with tablet-apps in three main categories:
mathematical and curricular meaning, didactical aspects and technical matters. Setting the focus on the didactical potentials of tablet-apps, the overarching categories are further specified finalizing with six categories: (1) mathematical contents and relation to curriculum, (2) communication,
collaboration and cooperation, (3) differentiation, (4) feedback and assessment, (5) connections and networking and (6) logistics, obtained through the grounded methodological approach in a theoretical model. The suggested model should also adequately represent the development of task, task-format
and LE in it. Additionally, a descriptive case study for illustrating the theoretical model for design and analysis of potentials of tablet apps for elementary geometry is also offered. The proposed model may be meaningful for teachers’ decision making when selecting and implementing
touchpad-apps in their instructional practices but also for developmental surveying of existing apps, their re-designs and further novel designs involving identified potentials.
Development of Mathematics Items with Dynamic Objects for Computer-Based Testing Using Tablet PC
Authors: Yasuno Fumiko , Nishimura Keiichi , Negami Seiya , Namikawa Yukihiko
Published: June 2024

Our study is on developing mathematics items for Computer-Based Testing (CBT) using Tablet PC. These items are subject-based items using interactive dynamic objects. The purpose of this study is to obtain some suggestions for further tasks drawing on field test results for developed
items. First, we clarified the role of the interactive dynamic objects on each item, according to the problem-solving process. Then, we conducted the field tests with Japanese high school students. As a result, we identified possible improvements in item design. For example, we had some questions
that cannot be asked in Paper-Based Testing (PBT), there is a possibility to evaluate the mathematical competencies more in detail according to the process, and so on. Here we shall show a few examples. Finally, we hope to make a contribution that might inform assessments and examinations
to support progression between secondary school and tertiary education.
Exploring Essential Aspects when Technology-Enhanced Flipped Classroom Approaches are at the Heart of Professional Mathematics Teacher Development Courses
Authors: Weinhandl Robert , Lavicza Zsolt
Published: June 2024

Recently, the idea of the Fourth Industrial Revolution (FIR) is increasingly shaping discussions about the world of work and society. In order to prepare the next generations for such new developments, it is necessary to adjust the way they learn. One possibility for a change in
education is Flipped Classroom Approaches (FCA), which are particularly helpful in mathematics education. The aim of our research is to identify essential pillars for teachers, when they are being familiarised with FCA. Therefore, we have chosen a research method that integrates various approaches
and diverse data sources. The data from a first sequence of expert interviews indicate, that regulatory changes, the recognition of one’s own learning and its added value, as well as being a member of a learner group are crucial in those cases, where the topic of teacher training utilise
both student-centred and technology-enhanced forms of learning. Thus, it would be necessary to modify in-service teacher training in Austria and beyond to utilise FCA.