scholarly journals Making a Rhombicosidodecahedron: Mathematical Thinking Revisited

2019 ◽  
pp. 120-140
Author(s):  
ÖZLEM ÇEZIKTÜRK ◽  
SINEM İNCE ◽  
GÜLAY YALIM ◽  
KÜBRA KARADENIZ ◽  
ZÜLAL KENAR
Keyword(s):  
Mathematics Teachers ◽  
Mathematical Thinking ◽  
Mathematical Object ◽  
Construction Process ◽  
Future Studies ◽  
Archimedean Solid ◽  
Creative Insight ◽  
Art Course ◽  
Model Formation

A rhombicosidodecahedron (an Archimedean solid with 30 square, 20 triangles, and 12 pentagon faces) was redeemed from 60 pieces by modular origami. This study used a qualitative research case study as it asked about how participants experienced this construction process of rhombicosidodecahedron. Preservice primary mathematics teachers from a mathematics and art course were participants of the study.  Additionally, one student; the first student who came out with the totally symmetric and no damaged object was interviewed for the assembly process. Mathematical thinking throughout the process was noted. Student brought her/his previous experiences as much as specific aptıtudes. Student took this project as a creative writing piece so that the process gone through similar phases as intro, progress, and artifact. Deformations and sinking occurred but student investigated the specifics of the real mathematical object did it without a fault. To deal with problems occurred in the phases; students used a creative insight as using paperclips to attach modules and assembly of half spheres. Two main processes; organizational and structural took place in the creative model formation and assembly. Suggestions and future studies are also discussed.  

scholarly journals ICT Integration in Developing Competence for Pre- Service Mathematics Teachers: A Case Study from Six Universities in Vietnam

2020 ◽  
Vol 15 (14) ◽  
pp. 19
Author(s):  
Trung Tran ◽  
Hung Anh Phan ◽  
Hong Van Le ◽  
Hung Thanh Nguyen
Keyword(s):  
Mathematics Teachers ◽  
Ministry Of Education ◽  
Ict Integration ◽  
Ict Skills ◽  
Educational Levels ◽  
Future Studies ◽  
Competence Structure ◽  
Teaching Learning ◽  
And Training

Competence structure that pre-service teachers need to develop to become a future teachers has been defined since the 1930s. For pre-service mathematics teachers, their competence has its own characteristics. ICT integration in developing competence for pre-service mathematics teachers has been been proved to be effective in many previous studies. In Vietnam, the Ministry of Education and Training (MOET) has recommended the use of ICT to enhance teaching-learning activities in schools and universities, therefore, there have been many studies on ICT intergration at different educational levels. However, there are only a few studies on the use ICT integration in developing competence for pre-service mathematics teachers. This paper presents results from a research on the feasibility of ICT integration in developing competence of Vietnamese pre-service mathematics teachers. The research was conducted by surveying on a randomly selected of 297 pre-service mathematics teachers and 40 mathematics lecturers in six universities which provide mathematics training programs. Results show that despite of the availability of technologies, ICT integration in training pre-service teachers is still limited. In addition, ICT integration in teaching activities of mathematics teachers is not really effective because the levels of their ICT skills are very different. Pre-service mathematics teachers have the ability to use ICT equipment, and good accessibility to learning systems, but their use of the learning management systems (LMS) is limited. This study can be a reference for future studies to test the effective of ICT integration in training pre-service teachers when designing activities to develop feasibly and effectively their competence.

scholarly journals ArcGIS Urban: an application for plan assessment

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Ellen Soward ◽  
Jianling Li
Keyword(s):  
United States ◽  
The United States ◽  
Spatial Context ◽  
Future Studies ◽  
Planning Profession ◽  
Gis Tools ◽  
Comprehensive Plans ◽  
Near Future ◽  
The City

AbstractMost cities in the United States rely on zoning to address important planning-related issues within their jurisdictions. Planners often use GIS tools to analyze these issues in a spatial context. ESRI’s ArcGIS Urban software seeks to provide the planning profession with a GIS-based solution for various challenges, including zoning’s impacts on the built environment and housing capacity.This research explores the use of ArcGIS Urban for assessing the existing zoning and comprehensive plans in meeting the projected residential growth in the near future using the City of Arlington, Texas as a case study. The exploration provides examples and lessons for how ArcGIS Urban might be used by planners to accomplish their tasks and highlights the capabilities and limitations of ArcGIS Urban in its current stand. The paper is concluded with some suggestions for future studies.

scholarly journals The Potential of GRASP/GARRLiC Retrievals for Dust Aerosol Model Evaluation: Case Study during the PreTECT Campaign

2021 ◽  
Vol 13 (5) ◽  
pp. 873
Author(s):  
Dimitra Konsta ◽  
Alexandra Tsekeri ◽  
Stavros Solomos ◽  
Nikolaos Siomos ◽  
Anna Gialitaki ◽  
...  
Keyword(s):  
Model Evaluation ◽  
Dust Concentration ◽  
Saharan Dust ◽  
North Coast ◽  
Concentration Profiles ◽  
Future Studies ◽  
Aerosol Model ◽  
The North ◽  
Sun Photometer

We use the Generalized Retrieval of Aerosol Surface Properties algorithm (GRASP) to compare with dust concentration profiles derived from the NMME-DREAM model for a specific dust episode. The GRASP algorithm provides the possibility of deriving columnar and vertically-resolved aerosol properties from a combination of lidar and sun-photometer observations. Herein, we apply GRASP for analysis of a Saharan dust outburst observed during the “PREparatory: does dust TriboElectrification affect our ClimaTe” campaign (PreTECT) that took place at the North coast of Crete, at the Finokalia ACTRIS station. GRASP provides column-averaged and vertically resolved microphysical and optical properties of the particles. The retrieved dust concentration profiles are compared with modeled concentration profiles derived from the NMME-DREAM dust model. To strengthen the results, we use dust concentration profiles from the POlarization-LIdar PHOtometer Networking method (POLIPHON). A strong underestimation of the maximum dust concentration is observed from the NMME-DREAM model. The reported differences between the retrievals and the model indicate a high potential of the GRASP algorithm for future studies of dust model evaluation.

USING IDIOBLASTS TO GROUP LAURINOXYLON SPECIES: CASE STUDY FROM THE OLIGO-MIOCENE OF EUROPE

IAWA Journal ◽  
2016 ◽  
Vol 37 (3) ◽  
pp. 459-488 ◽  
Author(s):  
Dimitra Mantzouka ◽  
Vasileios Karakitsios ◽  
Jakub Sakala ◽  
Elisabeth A. Wheeler
Keyword(s):  
Fossil Wood ◽  
New Combination ◽  
The Czech Republic ◽  
Axial Parenchyma ◽  
Future Studies ◽  
Ray Parenchyma Cells ◽  
Type 3 ◽  
Of Greece

Several specimens of Lauraceae fossil wood from the Cenozoic of Greece (southern part of Lesbos), the Czech Republic (Kadaň-Zadní Vrch Hill and Jáchymov), and Hungary (Ipolytarnóc) were studied. When considering whether they belonged to the speciose fossil wood genus Laurinoxylon, we reviewed the literature and data from InsideWood on fossil and modern woods. As a result, we propose criteria for excluding a fossil Lauraceae wood from Laurinoxylon and list the species that should be excluded from this genus. The criteria (filters) proposed to exclude a genus from having relationships with Laurinoxylon are: A. Axial parenchyma features: A1. Marginal axial parenchyma, A2. Aliform to aliform-confluent paratracheal parenchyma. B. Ray features: B1. Rays higher than 1 mm, B2. Exclusively homocellular rays, B3. Rays more than 5 cells wide, B4. Rays storied. C. Porosity features: Ring-porous. D. Idioblasts: Absence of idioblasts. Based on the distribution of idioblasts, we recognize four groups in Laurinoxylon (Type 1 - with idioblasts associated only with ray parenchyma cells, Type 2a - with idioblasts associated with both ray and axial parenchyma, Type 2b - with idioblasts associated both with rays and present among the fibres, and Type 3 - with idioblasts associated with ray and axial parenchyma and also among the fibres) and list the extant genera with features of those groups. Such grouping helps with interpreting the relationships of fossil lauraceous woods with extant genera. We discuss the Oligocene–Miocene European species that belong to these Laurinoxylon groups, noting that some warrant reassignment to different genera or even families. Future studies are needed to determine whether new genera should be established to accommodate these species. We propose the new combination Cinnamomoxylon variabile (Privé-Gill & Pelletier) Mantzouka, Karakitsios, Sakala & Wheeler.

Characterising lesson planning: a case study with mathematics teachers

2018 ◽  
Vol 31 (3) ◽  
pp. 260-278
Author(s):  
María José González ◽  
Pedro Gómez ◽  
Andrés Pinzón
Keyword(s):  
Mathematics Teachers ◽  
Lesson Planning

scholarly journals Chemical Incident Analysis Involving Storage of Fertilizer Product

2021 ◽  
Vol 38 (1) ◽  
Author(s):  
Rogerio De Medeiros Tocantins ◽  
Bettina Tomio Heckert ◽  
Rafael Salum de Oliveira ◽  
Hélio João Coelho ◽  
Gisele Chibinski Parabocz ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Water Bodies ◽  
Reaction Products ◽  
Future Studies ◽  
Adjacent Water ◽  
Forensic Engineering ◽  
Fertilizer Material ◽  
The City ◽  
Incident Analysis

A forensic engineering analyses of a chemical incident is presented that was classified as a self-sustaining decomposition (SSD) event, which occurred in a load of 10,000 tons of NK 21-00-21 fertilizer bulk stored inside a warehouse in the city of São Francisco do Sul in Brazil. The chemical reaction developed within the fertilizer mass and took several days to be controlled, resulting in the evacuation of thousands of residents. The water used to fight against the reaction, after having contact with the load of fertilizer material, promoted changes in adjacent water bodies, causing the death of animals (fish, crustaceans, and amphibians). The smoke from the chemical reaction products damaged the incident’s surrounding vegetation. Large SSD events are rare, with an average worldwide frequency of one every three years. Therefore, in addition to presenting a case study of this type of phenomenon, the main objective of this work is to discuss the causes that led to SSD reaction at this event, evaluate its consequences, and motivate future studies.

scholarly journals Evaluation of the Structural Stability of an Octagonal Dome with Meridional Cracks. Case Study: Temple of Santa Lucia, Ambalema, Colombia

2017 ◽  
Vol 2 (2) ◽  
pp. 25
Author(s):  
Jorge Olmedo Montoya ◽  
Olimpia Niglio ◽  
Karol Brigith Romero
Keyword(s):  
Structural Stability ◽  
Dynamic Loads ◽  
Seismic Events ◽  
Seismic Loads ◽  
Construction Process ◽  
Analysis Software ◽  
Historical Structures ◽  
The Temple ◽  
Typical Process

This work performed a comparative analysis between the construction process carried out when building the dome at the Temple of Santa Lucía, in Ambalema-Colombia and the typical process of an octagonal dome. Additionally, the structural stability is assessed of the dome of the case study against service and dynamic loads. To compare with the case study, known domes were taken as examples from structures in Italy and Spain. The analysis includes a study on the dome’s geometry and the constructive errors found. Methodology: The dome’s stability was evaluated through structural analysis software for which the dome was simplified into a system of four articulated arches. Conclusions: As a result, it was found that the dome of the temple of Santa Lucía does not have a system to counteract lateral thrusts (a drum or its similar), which permitted the appearance and widening of meridional cracks. These cracks propagate from the base to the crown, but do not compromise the structure’s stability for service loads. The analysis for seismic loads indicates that the dome is at risk of collapse upon seismic events, even of moderate magnitudes. Originality: The study is aimed at architects and engineers interested in the theme of restoration of historical structures.

scholarly journals A Case Study of Chinese Students’ and IEP Faculty Perceptions of a Creativity and Critical Thinking Course

2019 ◽  
Vol 9 (3) ◽  
pp. 34 ◽  
Author(s):  
James Badger
Keyword(s):  
Critical Thinking ◽  
International Students ◽  
Faculty Perceptions ◽  
Chinese Students ◽  
Intensive English ◽  
Future Studies ◽  
Effective Strategies ◽  
Intensive English Programs ◽  
Analytic Skills

The attention to fostering learners’ critical thinking and creativity skills in secondary school and college students is growing in Western and non-Western countries. This study investigated the integration of a creativity and critical thinking course in an Intensive English Programs (IEP) to determine how the same course may contribute to international students’ linguistic skills and analytic abilities in preparation for college. Perry’s (1970) conceptual framework was adopted to analyze Chinese students’ views of problems presented in a creativity and critical thinking course, and how the same knowledge related to the Chinese students’ prior educational experiences as well as connect to their future studies. IEP faculty and administrator’s perceptions provided an additional perspective into the purpose and learning outcomes of the same course. Findings from this research address a gap in the literature that seeks effective strategies and models for IEPs to foster international students’ analytic skills in preparation for college studies.

scholarly journals Comparison of prospective mathematics teachers’ problem posing abilities in paper-pencil test and on dynamic geometry environment in terms of creativity

2020 ◽  
Vol 9 (3) ◽  
pp. 243
Author(s):  
MEHMET FATIH ÖÇAL ◽  
TUĞRUL KAR ◽  
GÜRSEL GÜLER ◽  
ALI SABRI İPEK
Keyword(s):  
Mathematics Teachers ◽  
Prospective Teachers ◽  
Creative Thinking ◽  
Dynamic Geometry ◽  
Thinking Skills ◽  
Problem Posing ◽  
Dynamic Geometry Environment ◽  
Mathematical Concepts ◽  
Prospective Mathematics Teachers

This study aims to investigate the similarities and differences between prospective mathematics teachers’ creative thinking skills in paper-pencil test and on a Geogebra-supported environment in terms of problem-posing. This case study used purposive sampling method for determining the participants. Findings revealed that the activities carried out in the GeoGebra-supported environment were insufficient to produce creative problems, and GeoGebra’s main utility to prospective teachers was in identifying their mistakes related to mathematical concepts and discrepancies among numerical values of the problems posed. The reasons for the low achievement in posing problem were discussed: These were; (i) lack of problem-posing experience, (ii) the structure of problem-posing activity, and (iii) prospective teachers’ mathematical content knowledge.

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