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1.

A Mathematica l Model for the Study and Forecast of the Concentration of Harmful Substances in the Atmosphere Normakhmad Ravshanov, Mukhamadamin Shertaev, Nodira Toshtemirova American Journal of Modeling and Optimization. 2015 3 (2). doi: 10.12691/ajmo-3-2-1 Keywords: mathematical model, numerical algorithm, harmful substances, wind speed, humidity, weather and climate factor, soil erosion, resistance force, destruction force, concentration Context: ...f overview of the problem of studying and forecasting the diffusion of harmful substances in the atmosphere. Authors developed a Mathematica l model that takes into several parameters of the process and also weather and climate factors. Numerical experiments were conduct... Abstract Full Text (PDF) [Epub] Full Text (HTML)

2.

A Trapezoidal Fuzzy Method for Assessing Students’ Mathematica l Modeling Skills Michael Gr. Voskoglou American Journal of Educational Research. 2014 2 (12). doi: 10.12691/education-2-12-3 Keywords: mathematical modeling (MM), fuzzy sets and logic, centre of gravity (COG) defuzzification technique, trapezoidal fuzzy assessment model (TRFAM) Context: ...f vagueness and/or uncertainty. In this paper, we apply a new trapezoidal fuzzy assessment model (TRFAM) for measuring students’ Mathematica l modeling (MM) skills. TRFAM is actually a variation of the commonly used in fuzzy logic centre of gravity (COG) defuzzification ... Abstract Full Text (PDF) [Epub] Full Text (HTML)

3.

An Effort to Improve Mathematica l Problem Solving Ability of Middle Secondary School Students through Autograph-Assisted Mathematics Realistic Education Approach Roima Rizki Lestari, Mulyono, Ani Minarni American Journal of Educational Research. 2018 6 (10). doi: 10.12691/education-6-10-1 Keywords: mathematical problem solving ability, realistic mathematics education approach, autograph software Context: This study aims to investigate (1) the improvement of students' Mathematica l problem solving ability (MPSA) through Autograph-assisted realistic mathematics education approach (ARME), (2) The existence of ... Abstract Full Text (PDF) [Epub] Full Text (HTML)

4.

Analysis of Mathematica l Problem-Solving Abilities Taught Using Problem-Based Learning Rosmawaty Simatupang, E. Elvis Napitupulu, Edi Syahputra American Journal of Educational Research. 2019 7 (11). doi: 10.12691/education-7-11-6 Keywords: analysis, problem-solving abilities, problem-based learning Context: This study aims to analyze: (1) The level of students' Mathematica l problem-solving ability, (2) Mistakes made by students in solving mathematical problem-solving problems. This type of research i... Abstract Full Text (PDF) [Epub] Full Text (HTML)

5.

Analysis of Metacognitive Skills in Solving Mathematica l Problems Reviewed from Students’ Learning Style Khairatun Nisa Rambe, Bornok Sinaga, Asmin American Journal of Educational Research. 2019 7 (11). doi: 10.12691/education-7-11-5 Keywords: metacognition ability, Mathematica l problem solving, honey & mumford learning style Context: This study aims to analyze: (1) the level of metacognitive skills in Mathematica l problem solving in terms of student learning styles; (2) metacognition difficulties experienced by students in solving mathemati... Abstract Full Text (PDF) [Epub] Full Text (HTML)

6.

Analysis of Students Failure in Mathematica l Problem Solving Based on Newman Procedure at Middle Secondary School 3 Aceh Tamiang District Siti Rukmana Yus, Syafari, Ani Minarni American Journal of Educational Research. 2019 7 (11). doi: 10.12691/education-7-11-20 Keywords: types of in solving math problem based on the Newman procedure, Mathematica l problem solving, problem-based learning Context: This research aims to: 1) analyze the types of errors made in solving Mathematica l problems (MP) based on Newman's procedures by students taught through problem-based learning (PBL); 2) to find the cause of erro... Abstract Full Text (PDF) [Epub] Full Text (HTML)

7.

Analysis of Students Metacognitive Ability in Mathematica l Problem Solving in SMP Negeri 4 Bendahara Aceh Tamiang Nurdiana Fahmi, Bornok Sinaga, W. Rajagukguk American Journal of Educational Research. 2019 7 (2). doi: 10.12691/education-7-2-8 Keywords: analysis, metacognitive ability, problem sovling, problem based learning Context: The purpose of this research is to analyze: 1) the students metacognitive ability in Mathematica l problems solving, 2) difficulties experienced by students’ metacognitive in mathematical problem solving, 3) process of students... Abstract Full Text (PDF) [Epub] Full Text (HTML)

8.

Analysis of the Difficulties of Students Mathematica l Creative Thinking Process in Implementing of Problem-Based Learning Model Endang Hutauruk, Bornok Sinaga, M Mulyono American Journal of Educational Research. 2020 8 (3). doi: 10.12691/education-8-3-3 Keywords: analysis, Mathematica l creative thinking process, Problem Based Learning model Context: This study aims to: (1) determine the level of students Mathematica l creative thinking abilities; (2) analyze the difficulties of students mathematical creative thinking process through the Problem... Abstract Full Text (PDF) [Epub] Full Text (HTML)

9.

Analyze and Mathematica l Modeling of the Combustion Process of One-Cylinder Spark Ignited Hydrogen Fueled Engine Rachid Maamri, Alexandre Petrovitsh Martshenko, O. O. Osetrov, Yves Dubé, Lotfi Toubal, Agbossou Kodjo American Journal of Vehicle Design. 2013 1 (2). doi: 10.12691/ajvd-1-2-1 Keywords: hydrogen internal combustion engines, wiebe combustion model Context: Hydrogen is a potential replacement for fossil fuels in the transportation sector because it is clean, renewable and has the possibility to reduce emission of criteria pollutants (NOx) and the effect on global warming via carbon dioxide which is negligible. The present research study is devoted to analyze the process of combustion of hydrogen in the four-cycle one-cylinder spark ignited engine and to concern with developing a numerical model that consider the features of process of combustion, to estimate the influence of the constructive and the control parameters of the engine on process of combustion. It is found that the curve of speed of combustion at hydrogen blending is close to the triangular form. It was found that varying the compression ratio and, to a lesser extent, the ignition timing influences the duration and the dynamics of the combustion process, more than at varying the air–fuel ratio. Abstract Full Text (PDF) [Epub] Full Text (HTML)

10.

Analyze JPEG File Size for Random Pictures Using Random Function in Mathematica Tanvir Prince American Journal of Applied Mathematics and Statistics. 2014 2 (4). doi: 10.12691/ajams-2-4-14 Keywords: random pictures, Mathematica , JPEG compression Context: Using the random function in Mathematica (a mathematical software), random numbers between 0 and 1 were generated which in turn used to create random pictures. The random... Abstract Full Text (PDF) [Epub] Full Text (HTML)