Indonesia Conference Directory


<< Back

Abstract Topic: Mathematics

Page 1 (data 1 to 30 of 77) | Displayed ini 30 data/page

A Mathematical Model of the Cognitive Semantics of the English Preposition on
Ruswan Dallyono, Didi Sukyadi

Show More

Corresponding Author
Ruswan Dallyono

Institutions
Universitas Pendidikan Indonesia

Abstract
A mathematical approach to linguistics provides an array of insights for quantitative description on the ways language works. This area of investigation is still underexplored, but it is actually significant for the development of mathematical models to enhance linguists- understanding on linguistic structure. This study aims to present a mathematical analysis of how the English preposition on works under the framework of Trajector (TR) and Landmark (LM) relations (Tyler & Evans, 2003). Data were corpora taken from 10 dissertations written by American student writers. To sort the data, Ant Conc 3.4.1.0 was used to parse clauses or sentences based on the TR-LM configurations. Based on the TR-LM configurations, a mathematical model was developed to discover how these variables are quantitatively related to the number of senses produced by using a geometric representation of TR and LM. This study indicates that the relation between TRs and LMs, on the one hand, and the potential sum of senses, on the other, follows the integral function of ∑ C = ∫ TR d(LM), which means that the total number of senses of C equals the integral of TR with respect to LM. This mathematical modeling confirms the TR-LM hypothesis that every physical object has a unique sense established by their TR-LM configuration as spawned by Lakoff (1987).

Keywords
Keywords: construal, sense, preposition, trajector, landmark

Topic
Mathematics

Link: https://ifory.id/abstract/eJxjQW8a4kEK


A Modified Lax-Friedrichs Method for the Shallow Water Equations
Kartika Yulianti, Rini Marwati, Suci Permata Hati

Show More

Corresponding Author
kartika yulianti

Institutions
Universitas Pendidikan Indonesia

Abstract
In this paper, we present a simple modified Lax-Friedrich method for the numerical solution of shallow water equations. In the proposed method, we approximate the next-step value by applying the Lax–Friedrichs method at the half grid of space. The method were applied to simulate the wave propagation at a rest pool for non-flat topography. Based on the simulation, the proposed method is more accurate in terms of fulfill the conservation law than the classical Lax-Friedrichs method and it shows good agreement with steady analytical solution.

Keywords
Shallow water equations, Lax-Friedrichs method, Modification

Topic
Mathematics

Link: https://ifory.id/abstract/VXDv3yrZ4Wc9


A note on generalized Holder-s inequality in p-summable sequence spaces
Al Azhary Masta1, Eka Rahma Kurniasi2, Rajab Vebrian2, and Iis Juniati Lathifah2

Show More

Corresponding Author
Al Azhary Masta

Institutions
1Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi 229, Bandung 40154, INDONESIA

2Department of Mathematics Education, STKIP Muhammadiyah, Jl. KH. Ahmad Dahlan 51, Kabupaten Bangka Tengah, Bangka Belitung, 33684, INDONESIA

Abstract
In this paper we present sufficient and necessary conditions for generalized Ho ̈lder-s inequality in p summable sequence spaces which complete the Masta, et al. result in 2018. One of the keys to prove our results is to use the norm of the characteristic sequence of the balls in Z^n.

Keywords
Holders inequality, sufficient and necessary conditions, p-summable sequence spaces

Topic
Mathematics

Link: https://ifory.id/abstract/q3GMHPFWLKtz


A Study of Several Variable Selection Methods in Modelling The Mathematics Score of Indonesian Students in Programme for International Student Assessment (PISA) Based on Convex Penalized Likelihood
Vera Maya Santi (a*), Khairil Anwar Notodiputro (b), Bagus Sartono (b)

Show More

Corresponding Author
Vera Maya Santi

Institutions
a) Department of Statistics, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta
b) Department of Statistics, Faculty of Mathematics and Natural Science, Institut Pertanian Bogor

Abstract
Variable selection is an important topic in linear regression analysis. In practice, a large number of predictors usually are introduced at the initial stage of modeling to attenuate possible modeling biases. stepwise deletion and subset selection are usually used which can be computationally expensive and ignore stochastic errors in the variable selection process. In addition, the best subset selection of variables suffers from several disadvantages, the most severe of which is its a lack of stability. In this article, penalized likelihood approaches are proposed to handle these kinds of problems. The proposed methods select variables and estimate coefficients simultaneously. Some of penalty functions are used to produce sparse solutions. Based on the RMSE and GIC criteria, it was found that the factors affecting Indonesian mathematics scores from PISA with 148 independent variables showed that the SCAD penalty function had the best performance compared to LASSO, Ridge and MCP. LASSO produces 13 important variables for the model while SCAD has 11 variables which mean that the LASSO model is more complex than SCAD. The MCP produces a simpler model with 3 important variables but produces excessive bias.Ridge penalty has a worst performance based on all criteria.

Keywords
Variable Selection; Penalized Likelihood; SCAD; LASSO; MCP; Ridge; GIC; RMSE.

Topic
Mathematics

Link: https://ifory.id/abstract/AxC9NBMjKQrk


A sufficient condition for generalized Ho ̈lder-s inequality in Orlicz sequence spaces
Siti Fatimah1, Al Azhary Masta1, Ifronika2, Risnina Wafiqoh3, and Putri Cahyani Agustine3

Show More

Corresponding Author
Al Azhary Masta

Institutions
1Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi 229, Bandung 40154, INDONESIA

2Analysis and Geometry Research Group, Bandung Institute of Technology, Bandung, INDONESIA

3Department of Mathematics Education, STKIP Muhammadiyah, Jl. KH. Ahmad Dahlan 51, Kabupaten Bangka Tengah, Bangka Belitung, 33684, INDONESIA

Abstract
In this paper we present a sufficient condition for generalized Ho ̈lder-s inequality in Orlicz sequence spaces. One of the keys to prove our results is to use the norm of the characteristic sequence of the balls in R^n.

Keywords
Ho ̈lders inequality, sufficient and necessary conditions, p-summable sequence spaces

Topic
Mathematics

Link: https://ifory.id/abstract/tQ8f3c64eFhd


Analysis Of Geometry Learning Materials In Developing E-Module With Inquiry Approach
Dyah Triwahyuningtyas, I Ketut Suastika

Show More

Corresponding Author
Dyah Triwahyuningtyas

Institutions
Universitas Kanjuruhan Malang, Indonesia

Abstract
The development of online teaching materials technology makes it easier for students to study anywhere and anytime. In general, students still experience difficulties in understanding the material of the material in learning geometry. Therefore, the purpose of this study is to analyze geometry learning material in developing e-modules with an inquiry approach. This study applies the research and development method of Plomp in the preliminary research phase. The data analysis technique used is descriptive quantitative and qualitative data analysis. The results of this study are geometry learning material in elementary school teacher education students including material two-dimentional figure and space geometry. Geometry learning material that was previously used by students still gives the concept in finished form, so students only memorize in understanding the concept. Implementation of the results of the material analysis will be developed teaching materials in the form of e-modules for learning geometry with the inquiry approach.

Keywords
E-module, Inquiry, Two-Dimentional Figure

Topic
Mathematics

Link: https://ifory.id/abstract/fQvCJnyhLTBc


Analysis of Indicators achievement Habits of Mind (HoM) Senior High School Student.
Masta Hutajulu(a,b*), and Wahyudin Wahyudin(a)

Show More

Corresponding Author
Masta Hutajulu

Institutions
a)Postgraduat Departement of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229, Bandung 40154, Indonesia
b)Departement of Mathematics Education, IKIP Siliwangi, Jl. Terusan Jenderal Sudirman, Cimahi 40526, Indonesia
* masthahutajulu[at]student.upi.edu

Abstract
Abstract. This study aims to analyze the achievement of each indicators habits of mind (HoM) senior high school students. The research method used is descriptive. The population in this study were high school students in the city of Bandung. The sample was chosen by 1 class consisting of 31 students. The instrument used was the Habits of Mind questionnaire. The results showed that the habits of mind of senior high school students were positive for the 16 indicators and were at moderate to high levels. This study can be recommended to improve the habits of mind (HoM) senior high school students.

Keywords
Habits of mind, indicators

Topic
Mathematics

Link: https://ifory.id/abstract/mLQRrW7X6NA3


Analysis of Instruments and Mathematical Disposition Using Rasch Model
Didi Suhaedi, M Yusuf Fajar, Icih Sukarsih, and Yurika Permanasari

Show More

Corresponding Author
Didi Suhaedi

Institutions
Program Studi Matematika, Universitas Islam Bandung

Abstract
The reliability of students abilities is measured in aspects of cognitive, affective, and psychomotor abilities. One of the important affective abilities possessed by students is a mathematical disposition. The results of the study show that students who have high cognitive abilities generally have a high mathematical disposition too. This article discusses the description of the mathematical disposition abilities of eighth-grade vocational students in Bandung District. Analysis of students mathematical disposition data is performed using the Rasch Model. The results of the data analysis provide a description and interpretation of each students mathematical disposition statement item.

Keywords
Instruments, Mathematical Disposition, Rasch Model

Topic
Mathematics

Link: https://ifory.id/abstract/G2aYqHg7BxXQ


ANALYSIS OF MATHEMATICAL LEARNING MATERIALS WITH THE CHARACTERISTICS OF REALISTIC MATHEMATICS IN THE DESIGN RESEARCH STUDENT THESES IN THE MATHEMATICAL EDUCATION STUDY PROGRAM FMIPA UNJ
Pinta Deniyanti Sampoerno

Show More

Corresponding Author
Ratna Widyati

Institutions
Universitas Negeri Jakarta

Abstract
This study focuses on analyzing the theses of Mathematics Education Study Program students who are Design Research (DR) types. Thesis is analyzed with the aim to see the relationship between mathematics learning material with the characteristics of Realistic Mathematics Education. DR is a quite complex qualitative research and requires precision and creativity in preparing realistic mathematics learning. The emphasis of DR is on the process of delivering subject by teachers to students and the resulting product in the form of learning design which is part of the Hypothesis Learning Trajectory. Relational analysis in this study is in the form of error analysis as an effort to observe and describe deviations between mathematical concepts to be taught to students with mathematical contextual material to be appointed in research for every mathematical material that is described as human activity. Relational understanding produces conceptual knowledge, allows students to solve mathematical problems conceptually and can explain the strategies and steps used. From 36 DR theses, there are some learning materials which is felt to be very contextually forced, so that relational understanding is not achieved. But if it is right, not only acheived relational understanding, but also students mathematics learning outcomes increased.

Keywords
Design Research Error Analysis, Relational Understanding, Characteristics of Realtistic Mathematics Education

Topic
Mathematics

Link: https://ifory.id/abstract/TMNUgtCEXb9Y


Analysis Of Normality Of Quotient Subgroup On Matrices Integers Modulo Prime
Ibnu Hadi (a*), Selly Anastassia Amellia Kharis (a)

Show More

Corresponding Author
ibnu hadi

Institutions
a) Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta, Jalan Rawamangun Muka, Jakarta 13220, Indonesia
*ibnu_unj[at]yahoo.co.id

Abstract
A set of matrices integers modulo prime can form a finite group. This group has trivial and non-trivial subgroups. The trivial subgroup is normal clearly and for a non-trivial subgroup the normal properties will be investigated. Furthermore, if a non-trivial subgroup is a normal subgroup, then a quotient subgroup can be constructed. This paper discusses the characteristics of normality of quotient subgroup on matrices integers modulo prime. A group is constructed by matrices integers modulo prime. Here we considered some properties of this group. The order of group play an important role in this quotient subgroup. By this concept, we derive some result of normality of quotient subgroup. From this paper, it was found that the subgroup order had an effect on the normality of a quotient subgroup.

Keywords
Order of Group, Normality of Quotient Subgroup, Matrices Integers Modulo Prime

Topic
Mathematics

Link: https://ifory.id/abstract/A2PKpWwvQDrZ


Analytical Study and Numerical Solutions of Bird Flu Epidemic Model with Vaccination
Arrival Rince Putri (a*), Mahdhivan Syafwan (b)

Show More

Corresponding Author
Arrival Rince Putri

Institutions
a,b) Department of Mathematics, Andalas University, Kampus Unand Limau Manis, Padang, 25163, Indonesia
*arrivalputri[at]gmail.com

Abstract
Mathematical modeling is a tool used for the mechanism of strategy in controlling epidemics. In this paper, a basic model for bird flu epidemic is developed. Vaccination treatment of bird flu is a common method used to control disease. The bird flu model is reformulated by taking into account vaccination. Those models are system of ordinary differential equations. Stability of both the models are discussed and associated with the threshold number stating population is free of disease or infected. Numerical solutions are given on phase plane to confirm the analytical results.

Keywords
Epidemic model; Vaccination; stability; Threshold number; Numerical solutions

Topic
Mathematics

Link: https://ifory.id/abstract/YFcnMVD3h7pk


Application Ethnomatematics in Geometry Learning at SMP 99 Jakarta
Selly Anastassia Amellia Kharis (a*), Ellis Salsabila (a),

Show More

Corresponding Author
Selly Anastassia Amellia Kharis

Institutions
a) Faculty of Mathematics and Science, Universitas Negeri Jakarta, Jalan Rawamangun Muka, Jakarta 13220, Indonesia
*sellyanas[at]yahoo.com

Abstract
Innovative learning in mathematics can be doing through an approach called ethnomathematics. Application of ethnomathematics is focus to relate the material being taught with student condition in real life and encourage student to make connections between their knowledge with their application in the daily life. This paper aim to describe the application of ethnomatematics in the learning of geometry at Junior High School level. This paper uses literature study and experiment. The shapes of ethnomathematics are various results from mathematical activites that people have and develop in their community, including the mathematical concept in cultural heritage in the form of temples and inscriptions, pottery and traditional equipment, batik motifs and borders, traditional games, a local unit, and some activities that already become a culture in society. Ethnomathematics can be applied for teaching mathematics in junior high school level because this enables students to relate learning mathematics in school with their activities in their daily life. Students can easily think about mathematics because they know the application and the benefit of learning mathematics, especially in geometry learning.

Keywords
Ethnomathematics; Geometry Learning; Batik

Topic
Mathematics

Link: https://ifory.id/abstract/Tw4qKDuf6rMb


Application of fractal principles in redesigning an arabic calligraphy and rafflesia flower motif in batik besurek
Z M Mayasari

Show More

Corresponding Author
Zulfia Memi Mayasari

Institutions
Mathematics Department, Bengkulu University

Abstract
Batik besurek is one of Indonesias cultural heritages from Bengkulu Province. This batik is different from another batik in general because it has the characteristics of Arabic calligraphy. There are seven types basic of motifs in batik besurek, one of them is the Arabic calligraphy motif. In this paper explained the development of the pattern of the Arabic calligraphy and rafflesia flower motif in batik besurek. The pattern development is done by applying the fractal principles. The results is a new motif of batik besurek that are expected to enrich the style, shape, diversity of motifs, and enhance the beauty and selling value of the batik itself.

Keywords
batik besurek, fractal principles, characteristic, arabic calligraphy

Topic
Mathematics

Link: https://ifory.id/abstract/p4cg2AQ9DMnL


Betweenness Centrality in Corona Product of Path and Star Graph
Tri Irvan Haryadi (a*), Liliek Susilowati (a)

Show More

Corresponding Author
Tri Irvan Haryadi

Institutions
a) Departement of Mathematic, Faculty of Science and Technology, Universitas Airlangga, Jl. Mulyorejo, Surabaya, Indonesia
*tiharyadi[at]gmail.com

Abstract
Betweenness centrality is a concept in graph theory which is currently widely used in network analysis. The network can be an information network, criminal network, social interaction network, etc. The concept of betweenness centrality studies the potential ability of a point to exert influence on a network. If there is a point x in the shortest path between two points, then point x has the potential to influence information passing through that path. This paper will investigate the concept of betweenness centrality in the corona operation between path and star graph. Corona operation is one of the operations on graph theory that works between two graphs. The corona operation will duplicate the second graph and connect each copy to the first graph.

Keywords
Betweenness centrality; Corona; Graph

Topic
Mathematics

Link: https://ifory.id/abstract/9A4XuKeJ28RG


BIPLOT ANALYSIS FOR PROCESSING SCHOOL QUALITY IN ACCORDANCE WITH NATIONAL EXAMINATION VALUES
1. Fahrurrazi, 2. Turdjai 3. Manap Somantri, dan 4. Rohiat

Show More

Corresponding Author
Razi Fahrurrazi

Institutions
1. Mahasiswa program Doktor UNIB
2. Dosen S.3 Teknologi Pendidikan
3. Dosen S.3 Manajemen Pendidikan
4. Dosen S.3 Manajemen Pendidikan

Abstract
The issue of national examinations has always been a matter of debate, because the scores are only used to determine the passing scores of students without follow-up. There are two main objectives in this study, the first is mapping the quality of schools in accordance with national exam scores, and the second is to describe the relationship between national exam scores and influential variables. The data used in this study were compiled by Idris in his dissertation and published in a book titled Critical Analysis of Education Quality in 2005. Data were analyzed with a biplot package based on Mathematica programming, by combining several national deviation scores and standards. Gabriels goodness and Pearsons correlation coefficient were each used to measure proportional compatibility in the biplot and school quality configuration in the biplot. Mapping the quality of schools according to national examination scores cannot be obtained by biplots with standard variables. National examination scores, which are transformed with 1.5 standard deviations, will show the suitability of the rankings, and the biplot correctly displays all influential variables that have a very significant positive correlation. Expanding the scope of this study and using more recent data are recommended for further studies.

Keywords
school quality mapping, principal component analysis, biplot, good level of compatibility, Pearson correlation coefficient

Topic
Mathematics

Link: https://ifory.id/abstract/QmJk2EtWnwDU


Classification of Diabetics in Jakarta with Canonical Discriminant Analysis
Widyanti Rahayu, Vera Maya Santi, Bety Suryani Putri

Show More

Corresponding Author
Widyanti Rahayu

Institutions
Universitas Negeri Jakarta

Abstract
Diabetes is a chronic disease caused by unhealthy habits and lifestyle. Diabetes is characterized by increasing blood sugar levels in the body. Someone who has a blood sugar level slightly above normal can-t be said as a person with diabetes, such conditions are called prediabetes. Classifying diabetes case accurately is an important thing because the occurence of complications and also can be obtained significant variables that affect changes in a persons blood sugar levels. One of the statistics methods which can analyze classification of disbetes case is using linear discriminant analysis. However, when no assumptions can be made about the distribution within each group, or when the distribution is assumed not to be multivariate normal, canonical discriminant analysis can be used to classification of diabetes. In this study we will compare the classification of diabetics using linear discriminant analysis and canonical discriminant analysis. From the results, it was found that the classification accuracy with canonical discriminant analysis was higher than linear discriminant analysis

Keywords
discriminant analysis, diabetes, classification accuracy

Topic
Mathematics

Link: https://ifory.id/abstract/3JeXNrpdRG9Y


COMPARISON BETWEEN CONVEX AND QUASICONVEX FUNCTIONS ON R WITH DEVELOPMENT
Encum Sumiaty, Endang Dedy

Show More

Corresponding Author
Encum Sumiaty

Institutions
Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi no. 229, Bandung 40154, Indonesia

Abstract
According to study about convex function, A. W. Roberts and D. E. Varberg[17] have studied further. In this paper, we will introduce some basic properties about convex function and quasiconvex fucnction on R. Some comparison between properties of convex function and quasiconvex function will be presented also. Our results are quasiconvex function can be represented as monotone function either or at most as two combination of monotone functions, as consequences it is discontinuous mostly at countable points, and it is not differentiable at zero measure set only. However the results are still fundamental, but we will learn as clear as we can.

Keywords
Convex Function, Quasiconvex Function, Convex Function Space, Quasiconvex Function Space

Topic
Mathematics

Link: https://ifory.id/abstract/xtfe2AH6Trwz


Comparison Learning Model between Reciprocal Teaching and Problem Posing for Student Mathematical Understanding (Experiment at SMP 97 Jakarta)
Selly Anastassia Amellia Kharis (a*), Ellis Salsabila (a),

Show More

Corresponding Author
Selly Anastassia Amellia Kharis

Institutions
a) Faculty of Mathematics and Science, Universitas Negeri Jakarta
Jalan Rawamangun Muka, Jakarta 13220, Indonesia
*sellyanas[at]yahoo.com

Abstract
The ability to understand mathematical concepts is one of the abilities needed by students in mathematics learning. This study aims to compare learning model between reciprocal teaching and problem posing for student mathematical understanding. This research was conducted at SMP 97 Jakarta in class VII on the subject of One Variable Linear Equations. The research method used quasi experiment. The sampling technique uses two stage sampling; purposive sampling and cluster random sampling. Based on the research data, the average value of understanding the mathematical concept of experimental class I (reciprocal teaching model) is 70.83 while the experimental class II (problem posing model) is 64.35. The normality test using the Liliefors. Homogeneity testing using Fishers test. The research hypothesis test uses t-test statistics and the value of t count = 2.153 and t table = 1.667. Because tcount> t table, then H0 is rejected at the significance level &

Keywords
Student Mathematical Understanding, Problem Posing, Reciprocal Teaching

Topic
Mathematics

Link: https://ifory.id/abstract/YM4nmuceyRHp


Correlation between Coefficient of Thermal and Thermal stress fracture resistance on Ceramics filter exhaust
Husty Serviana Husain

Show More

Corresponding Author
Husty Serviana Husain

Institutions
Universitas Pendidikan Indonesia

Abstract
Data from 2017 to Dec. 14 2018 shows that there is a trend increase from the Coefficient of Thermal (CTE) from the Ceramics filter product from a company A and this makes a decrease in the meting point value of the Ceramic filter product which has approached the customer min spec (≥ 650 oC). A CTE value is needed that can be used as a standard to ensure the melting point value does not come out of the customer spec value. By using the correlation method a minimum CTE value will be used as a standard to guarantee the quality of the Ceramics filter from company A

Keywords
CTE, Statistics, Correlation

Topic
Mathematics

Link: https://ifory.id/abstract/UXHTajyAkWD7


Determination of Width Control of Dispersion Process for Single Sample Size in Multivariate Case with Many P=4 Variables
Enjang AS (1), Farid Soleh Nurdin (1), Wawan Setiawan(2), Iwan Gunawan (3), Eri Subekti (2)

Show More

Corresponding Author
Farid Soleh Nurdin

Institutions
1) Universitas Islam Negeri Sunan Gunung Djati, Jl. A.H. Nasution No.105, Cipadung, Cibiru, Kota Bandung
2) Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi no 229, Bandung
3) Universitas Langlangbuana, Jl. Karapitan no.116, Bandung

Abstract
In this study, we discussed the control of multivariate dispersion statistics for a single sample size. The control chart was developed from a multivariate control chart exponentially weighted mean square (MEWMS) with total variance (TV) as the multivariate dispersion size used. Although the MEWMS control chart has more advantages than MEWMA and MCUSUM control charts, it has limitations because it only applies to p = 3 variables. Therefore, the main focus in this study is to determine the L value as a determinant of the MEWMS control boundary width for the variable p = 4 through the simulation method. Based on historical data on controlling the wing component products of Airbus aircraft through simulations with vector mean parameters and covariance matrices, MEWMS Control Chart is quick in detecting changes in variance, while in detecting the average changes is very slow.

Keywords
Dispersion, Total Variance, Covariance Matrix

Topic
Mathematics

Link: https://ifory.id/abstract/VR37qNYefkAQ


Development of Property Rental Insurance Model
Sudarwanto, Lukita Ambarwati, Ibnu Hadi

Show More

Corresponding Author
Lukita Ambarwati

Institutions
Universitas Negeri Jakarta

Abstract
In this paper we developed insurance model on property rental business. We used Generalized Linear Models(GLM) to develop this model because the data on property rental matches to the characteristics of GLM. Analysis of the model is done by looking at the relationship between the distribution functions that are most widely used in the analysis of property rental data. The models for the relations of distribution functions are: Poisson-Gamma, Poisson-Inverse Gauss, Negative Binomial-Gamma and Negative Binomial-Inverse Gauss. The relationship between distributions is seen from the root-mean-squared error (RMSE) and absolute mean error (MAE). Simulation results show that the model formed in the case of random effects increases in standard deviation values also increases the variation value on the average estimator. This is in accordance with the condition that the addition of standard deviation means that there is an increase in the variance of the data.

Keywords
Property Rental Insurance, Generalized Linear Models

Topic
Mathematics

Link: https://ifory.id/abstract/Ttv23DGgm67z


Didactical Design to Overcome Learning Obstacles about Relationship between Central Angle, Length of Arc, and Area of Segment of the Circle
Mimi Nur Hajizah (*), Dwi Antari Wijayanti, Puspita Sari

Show More

Corresponding Author
Mimi Nur Hajizah

Institutions
Universitas Negeri Jakarta

Abstract
This research aims to develop a didactical design of learning about circle at junior high school, especially the relationship between central angle, length of arc, and area of segment of the circle. Developed didactical design consists of three activities obtained from three formal stages during the research process. The first stage is the analysis of the didactical situation before learning to obtain a hypothetical didactical design. Preparation of hypothetical didactical design is preceded by a preliminary study which includes the identification of obstacles student learning as well as the theoretical analysis and repersonalisasi. Identification of learning obstacle is conducted at a junior high school in South Jakarta involving 34 students of class IX by analyzing the results of the students answers on the questions provided, analyzing the results of interviews of teachers and students, as well as analyzing the textbooks used at the schools. The second stage is the analysis metapedadidaktic which is reflected in the design implementation. Design implementation is conducted at junior high school where a preliminary study done involving 36 students of class VIII. The third stage is the stage of reflection by conducting a retrospective analysis. This is done in order to obtain information for a revised design to produce empirical didactical design. The developed empirical didactical design allows for further development through the three stages of the same formal.

Keywords
didactical design; mathematics; learning obstacle; circle

Topic
Mathematics

Link: https://ifory.id/abstract/kQdexBfrAL76


DOMI KALI: ELEMENTARY SCHOOL MULTIPLICATION LEARNING MEDIA
Nury Yuniasih(a*), Resita Eka Novita Putri(b), Cicilia Ika Rahayu Nita(b)

Show More

Corresponding Author
Nury Yuniasih

Institutions
Elementary School Teacher Education Study Program, Universitas Kanjuruhan Malang
Jalan S. Supriadi No. 48 Malang Indonesia
nuryyuniasih[at]unikama.ac.id
resitaeka04[at]gmail.com
cirn[at]unikama.ac.id

Abstract
Abstract The purpose of this study is 1) to develop DOMI KALI media, 2) to describe the feasibility of the DOMI KALI media, 3) to describe the practicality of the DOMI KALI media. The method used is adapted from the ADDIE model with four stages, namely: analysis, design, development and implementation. The subjects of the trial were the third grade students of Sumbersari Elementary School 2. The instruments of data collection used questionnaires, unstructured interviews, and documentation. The results showed that the DOMI KALI media is feasible to use. Assessment by media experts gets a percentage of 91.25%. Assessment by material experts received a percentage of 93.75%. Assessment by prospective users gets a percentage of 82.14%. Assessment of the results of student responses to limited field trials received a percentage of 95.61%. Based on the explanation of the results of the assessment, the DOMI KALI media is "Eligible" or "Very Good" to be used as a learning medium.

Keywords
Domi Kali, Multiplication, Elementary School

Topic
Mathematics

Link: https://ifory.id/abstract/L3VNev74tp9Y


Drawing Graph of Quadratic Functions: What Affects It?
T S Sumartini, I Maryati, M A Noordyana, T Sritresna, Basuki

Show More

Corresponding Author
Tina Sri Sumartini

Institutions
Institut Pendidikan Indonesia Garut

Abstract
The quadratic function of the part of mathematics that is dynamic. This gives the meaning that drawing graphs of quadratic functions can use a variety of different ways. The purpose of this study is to find out various ways of presenting graphs of quadratic functions. The sample of this study took two respondents who had learned quadratic function material. The study was conducted qualitatively by analyzing the way the graphs of quadratic functions are presented. The results showed that the effectiveness of drawing quadratic functions is influenced by the ability to think creatively

Keywords
Quadratic Functions, Creative Thinking

Topic
Mathematics

Link: https://ifory.id/abstract/mhUy3wutMDLn


Dynamic Programming for An Optimization of Production Plan
Ulfasari Rafflesia, Fanani Haryo Widodo, Tuti Angraini

Show More

Corresponding Author
Ulfasari Rafflesia

Institutions
Universitas Bengkulu

Abstract
This study discusses the optimization of production plans using a dynamic programming through a case study on the one of a convection company. Fluctuating demand requires the convection company to implement a strategy to control the production process so that there are no shortages or excess products. The purpose of this study is to find out the total minimum costs with respect to school uniform production plans for the monthly-period demands of next one year. The initial step used in the production planning is by estimating the monthly-period demands of products for the next one year based on the monthly-period demands of previous 3-years. The implementation of dynamic programming brings to break down the case problem into 12 stages with respect to the monthly periods of the next one year. This study results in the total minimum cost of production plan for the next twelve months. Therefore it convinces that the production planning through dynamic programming is able to maintain the existence of a convection company due to its significant advantages of the approach for future production planning.

Keywords
Production planning, optimization, demand, dynamic programming

Topic
Mathematics

Link: https://ifory.id/abstract/vdRtrUZJqYmA


Generalized competition index of two-colored Wielandt digraphs
Hari Sumardi (a*), Saib Suwilo (b), Mardiningsih (b)

Show More

Corresponding Author
Hari Sumardi

Institutions
a) Graduate School of Mathematics Education, Bengkulu University, Bengkulu 38371, Indonesia
*harisumardi[at]unib.ac.id
b) Department of Mathematics, University of Sumatera Utara, Medan 20155, Indonesia

Abstract
A two-colored digraph (D^{(2)}) is called primitive if there exist nonnegative integers (h) and (k) such that for each ordered pair of vertices (v_a) and (v_b) there are ((h,k))-walk from (v_a) to (v_b) and (v_b) to (v_a). The competition index of a primitive two-colored digraph is the smallest positive integer (h+k) such that for each pair of vertices (v_a) and (v_b) there is a vertex (v_c) such that there are ((h,k))-walks from (v_a) to (v_c) and from (v_b) to (v_c). We study the generalized competition index of two-colored Wielandt digraphs.

Keywords
Two-colored digraph; Competition index; Generalized competition index

Topic
Mathematics

Link: https://ifory.id/abstract/xtfurVzK8HMP


Generalized Estimating Equation (GEE) Method Approach to Determine The Best Longitudinal Regression Model on Human Development Index Data In West Java
Hilda Nurmuslimah, Asep Solih Awalluddin, Rini Cahyandari

Show More

Corresponding Author
Hilda Nurmuslimah

Institutions
Islamic State University of Sunan Gunung Djati Bandung

Abstract
Longitudinal regression is a statistical method used to analyze the relationship between one or more independent variables and dependent variables on longitudinal data. Longitudinal data is the result of observation of a study in several different periods. Collecting data periodically causes the correlation in each object observation so that longitudinal data could not be analyzed with the usual regression methods. One of method used for regression analysis of correlated data is Generalized Estimating Equation (GEE). GEE method provides many types of correlation structures that are independent, exchangeable, AR(1) and unstructured. This research has intention to determine the best longitudinal regression models on study case of Human Development Index (HDI) in 2010-2014 used GEE method and four different correlation structures. The best model of it will be determined by using Quasi-likelihood Information Criterion (QIC) test. The result of analysis by seeing the smallest value of QIC is AR (1).

Keywords
Longitudinal Regression,Generalized Estimating Equation,Correlation,Human Development Index

Topic
Mathematics

Link: https://ifory.id/abstract/rUjETDyPYvqG


Holder-s inequality in Discrete Morrey spaces
Al Azhary Masta1, Indra Rukmana2 , Siti Fatimah3, and Muhamamd Taqiyuddin3

Show More

Corresponding Author
Al Azhary Masta

Institutions
1,3 Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi 229, Bandung 40154, INDONESIA

2 Raudhatul Jannah Sunior High School, Residence Grand Cilegon, Banten 42426, INDONESIA

4 Department of Mathematics Education, University of Georgia, Athens, United State of America

Abstract
Morrey spaces is a generalization of Lebesgues spaces. There are two type of Morrey spaces, i.e continous Morrey spaces and discrete Morrey spaces. In this paper we present sufficient and necessary conditions for Ho ̈lder-s inequality in discrete Morrey spaces. One of the keys to prove our results is to use the norm of the characteristic sequence of the balls in Z^n.

Keywords
Ho ̈lders inequality, sufficient and necessary conditions, discrete Morrey spaces

Topic
Mathematics

Link: https://ifory.id/abstract/BF2YfCZgDkHG


How Effective is the Vaccine in Reducing Outbreak of Diphtheria?
Fadilah Ilahi, Nenden Siti Nurkholipah

Show More

Corresponding Author
Fadilah Ilahi

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
Indonesia suffered a diphtheria outbreak in the late of 2017 after the last case in the 1980s. Over the years, DPT (Diphtheria Pertussis Tetanus) vaccine is believed to be the only ways of preventing diphtheria outbreaks. The Indonesian government requires all infants aged 2-4 months old to get DPT vaccine in order to get the immunity against diphtheria-causing bacteria with a single dose of vaccine on each month. The problem is when some infants do not have the complete vaccine so the effectiveness of DPT vaccine is need to be questioned. In this paper, the authors try to construct the model to see how effective the DPT vaccine for those cases. The population assumed to be closed population and consisted of SIR (Susceptible, Infected, and Recovery) population and the vaccine notated as a function of a dose that has taken by the infant. Furthermore, this model will be analyzed the stability using eigen values and basic reproduction number (R_0). The simulation is done to provide an overview of the effectiveness of the vaccine dynamically. Analysis and simulation results show that complete dose of DPT vaccine plays an effective role in reducing the spread of diphtheria.

Keywords
Diphtheria, vaccine, outbreak, epidemic, basic reproduction number, mathematical model

Topic
Mathematics

Link: https://ifory.id/abstract/VGgE2Q46LCF8


Implementation of Realistic Mathematics Education (RME) Through Comix Books on Results Learn Mathematics From Cognitive Sides
Ari Suryawan*, Tria Mardiana

Show More

Corresponding Author
DPPJ UMMagelang

Institutions
Universitas Muhammadiyah Magelang

ari.surya_88[at]ummgl.ac.id

Abstract
This study aims to determine the implementation of Realistic Mathematics Education through comics to the learning outcomes of fourth-grade mathematics elementary school. This research is an actual experimental study with a pretest-posttest control group design model. The research subjects were students in grade IV Elementary School. The sampling technique in this study was total sampling, consisting of 20 students in the experimental group and 20 students in the control group. Data analysis using parametric statistics with the t-test (independent sample t-test) The results showed that Realistic Mathematics Education (RME) through the Komix Book had a positive effect on mathematical results from the cognitive side. This is evidenced by the results of the analysis of the independent sample t-test with a significance value of 0.018 <0.05. Based on the analysis and discussion, there are differences in the increase in the average end of mathematics learning outcomes, namely the experimental group by 10.58 and the control group by 3.75. The results of the study can be concluded that realistic mathematics education through comic books has a positive effect on learning outcomes in mathematics

Keywords
Realistic Mathematics Education; Comix Book

Topic
Mathematics

Link: https://ifory.id/abstract/qC64WhFaNcR9


Page 1 (data 1 to 30 of 77) | Displayed ini 30 data/page

Featured Events

<< Swipe >>
<< Swipe >>

Embed Logo

If your conference is listed in our system, please put our logo somewhere in your website. Simply copy-paste the HTML code below to your website (ask your web admin):

<a target="_blank" href="https://ifory.id"><img src="https://ifory.id/ifory.png" title="Ifory - Indonesia Conference Directory" width="150" height="" border="0"></a>

Site Stats